JP6932089B2 - Diaper drying equipment and methods, fuel manufacturing equipment and methods - Google Patents

Description

The present invention relates to a paper diaper drying device and method, and further relates to a fuel manufacturing device and method using a dried disposable diaper.

Paper diapers are made of pulpwood, which is a urine absorbing pad, water-absorbing polymer, plastic materials such as vinyl, and a large amount of used disposable diapers with human waste are discarded in hospitals, facilities for the elderly, nurseries, etc. ..

Used disposable diapers are incinerated in an incinerator like kitchen waste, but there are hygiene problems and the combustion temperature needs to be raised because they contain a lot of water, which increases the operating cost of the incinerator. There was a problem such as doing. Therefore, in order to deal with these problems, it has been attempted to dry used disposable diapers, and to further mold and use them as fuel.

Under such circumstances, Patent Document 1 discloses a disposable diaper processing apparatus that crushes, dries, and processes used disposable diapers.

The processing apparatus of Patent Document 1 is a crushing mixing tank that crushes used paper diapers, adds a fermenting agent (microorganism), mixes and decomposes adhering urine, and supplies hot air to the crushing mixing tank to crush it. A hot air generator that heats the paper diaper with hot air to promote fermentation and decomposition and evaporates and dries the water, and deodorizes the exhaust of gas and steam generated in the crushing and mixing tank, sterilizes it at high temperature, and discharges it to the atmosphere. It has a deodorizing machine.

In the processing apparatus disclosed in Patent Document 1, the crushed and decomposed urine is fermented and decomposed in a crushing and mixing tank, and the crushed and dried paper diaper that has been dried by hot air and sterilized is used as it is as fuel, or is mixed and molded with waste plastic or the like. It will be used as a solid fuel.

Japanese Patent Application Laid-Open No. 2008-302271

In order to dry used disposable diapers with the apparatus disclosed in Patent Document 1, hot air generated by burning fuels such as city gas, LPG, kerosene and heavy oil with a hot air generator is sent to a tank containing the disposable diapers. Will be heated and dried.

Therefore, since hot air is generated for drying used disposable diapers, it is necessary to burn the fuel, which increases the fuel cost, and there is a problem that _{CO 2 derived from fossil fuel is emitted depending on the type of fuel.}

In addition, since the dry exhaust gas discharged when the paper diaper is heated and dried contains a strong odor, the dry exhaust gas is adsorbed and deodorized by a deodorant with a deodorizing device, or the odorous component is heated by high temperature combustion in a combustion furnace that burns fuel. It is necessary to disassemble and deodorize. Therefore, it is necessary to install a device for deodorization such as a deodorizing device and a pyrolysis deodorizing combustion furnace, and further, the fuel cost used for this pyrolysis deodorizing combustion furnace increases, and fossil fuels may be used depending on the type of fuel. There is a problem of emitting _{CO 2} derived from fuel.

In view of such circumstances, the present invention can effectively dry a disposable diaper without using fuel to dry the disposable diaper, and deodorize dry exhaust gas containing an odor generated when the disposable diaper is dried. It is an object of the present invention to provide a paper diaper drying device and method that do not require the installation of a diaper, and further, a fuel manufacturing device and method using the dried disposable diaper.

According to the present invention, as a means for solving the above-mentioned problems, a disposable diaper drying apparatus, a fuel manufacturing apparatus, a disposable diaper drying method, and a fuel manufacturing method having the following configurations are obtained.

[Paper diaper drying device]
The disposable diaper drying device is configured by any of the following <first invention> to <fourth invention>.

<First invention>
A high-temperature air production device that recovers heat from exhaust gas discharged from a waste incinerator to produce high-temperature air, a dryer that receives high-temperature air supply from the high-temperature air production device to dry used paper diapers, and an odor from the dryer. A paper diaper drying device characterized by being provided with a dry exhaust gas supply line that receives dry exhaust gas containing components and joins the combustion air supplied to the combustion chamber of a waste incinerator.

<Second invention>
A steam-type air preheater that produces high-temperature air by exchanging heat with steam generated by a boiler that recovers heat from the exhaust gas discharged from a waste incinerator, and a used paper diaper that receives high-temperature air supply from the steam-type air preheater. It is equipped with a dryer that dries the air and a dry exhaust gas supply line that receives dry exhaust gas containing odorous components from the dryer and joins it with the combustion air supplied to the combustion chamber of the waste incinerator.
The steam-type air preheater is characterized in that a part of the produced high-temperature air is supplied to the dryer and the rest of the high-temperature air is supplied to the combustion chamber of the waste incinerator as a part of the combustion air. Device.

<Third invention>
A combustion air preheater that produces high-temperature air by exchanging heat with exhaust gas discharged from a waste incinerator, a dryer that receives high-temperature air from the combustion air preheater to dry used paper diapers, and a dryer. It is equipped with a dry exhaust gas supply line that receives dry exhaust gas containing odorous components and joins the combustion air supplied to the combustion chamber of the waste incinerator.
The combustion air preheater is characterized in that a part of the produced high-temperature air is supplied to the dryer and the rest of the high-temperature air is supplied to the combustion chamber of the waste incinerator as a part of the combustion air. Device.

<Fourth invention>
High temperature due to heat exchange between the combustion air preheater that produces high temperature air for combustion by heat exchange with the exhaust gas discharged from the waste incinerator and the exhaust gas that is arranged on the downstream side of the combustion air preheater and has residual heat. A residual heat recovery air heater that produces air, a dryer that receives high-temperature air from the residual heat recovery air heater to dry used paper diapers, and a dryer that receives dry exhaust gas containing odorous components and burns the waste incinerator. Equipped with a dry exhaust gas supply line that joins the combustion air supplied to the room
The combustion air preheater is a paper diaper drying device characterized by supplying the manufactured high-temperature combustion air to the combustion chamber of a waste incinerator as a part of the combustion air.

[Fuel production equipment]
<Fifth invention>
A fuel manufacturing apparatus for producing fuel by molding a used disposable diaper to be dried by one of the first to fourth inventions, a disposable diaper drying apparatus, by itself or by mixing with other wastes.

[How to dry disposable diapers]
The method for drying disposable diapers is composed of any of the following <sixth invention> to <ninth invention>.

<Sixth invention>
The exhaust gas discharged from the waste incinerator is recovered by heat with a high-temperature air production device to produce high-temperature air, and the used paper diapers are supplied with high-temperature air from the high-temperature air production device and dried with a dryer. A method for drying paper diapers, which comprises supplying dry exhaust gas containing an odorous component from a dryer to a combustion chamber of a waste incinerator together with combustion air.

<Seventh invention>
High-temperature air is produced by exchanging heat between steam and air generated in a boiler that recovers heat from exhaust gas discharged from a waste incinerator with a steam-type air preheater, and used with high-temperature air from the steam-type air preheater. The finished paper diaper is dried with a dryer, and the dry exhaust gas containing odorous components from the dryer is supplied to the combustion chamber of the waste incinerator together with the combustion air through the dry exhaust gas supply line, and the high temperature produced by the steam type air preheater. A paper diaper drying method characterized in that a part of air is supplied to a dryer and the rest of high-temperature air is supplied to a combustion chamber of a waste incinerator as a part of combustion air.

<Eighth invention>
High-temperature air is produced by exchanging heat between the exhaust gas discharged from the waste incinerator and air with a combustion air preheater, and the used paper diapers are dried with a dryer using the high-temperature air from the combustion air preheater. Through the dry exhaust gas supply line, dry exhaust gas containing odorous components from the dryer is supplied to the combustion chamber of the waste incinerator together with combustion air, and a part of the high temperature air produced by the combustion air preheater is supplied to the dryer. A method for drying paper diapers, which comprises supplying the remainder of high-temperature air to the combustion chamber of a waste incinerator as a part of combustion air.

<Ninth invention>
High-temperature combustion air is produced by exchanging heat between the exhaust gas discharged from the waste incinerator and air with the combustion air preheater, and the exhaust gas and air having the residual heat of the exhaust gas from the combustion air preheater are separated. High-temperature air is produced by exchanging heat with the residual heat recovery air heater, and the used paper diapers are dried with the high-temperature air from the residual heat recovery air heater, and the odor component from the dryer passes through the dry exhaust gas supply line. The dry exhaust gas containing the above is supplied to the combustion chamber of the waste incinerator together with the combustion air, and the high temperature combustion air produced by the combustion air preheater is supplied to the combustion chamber of the waste incinerator as a part of the combustion air. A characteristic method for drying paper diapers.

[Fuel manufacturing method]
<10th invention>
A fuel manufacturing method for producing a fuel by molding a used disposable diaper, which is dried by one of the sixth to ninth inventions, a disposable diaper drying method, by itself or by mixing with other wastes.

According to the first to fourth inventions and the seventh to tenth inventions of the present application, a high temperature air production device, a steam type air preheater, a combustion air preheater or a residual heat recovery air heater provided in a waste combustion incinerator facility. By recovering heat from the exhaust gas discharged from the waste incinerator, the air is heated to produce high-temperature air, and a part of the high-temperature air and normal-temperature air are mixed and supplied to the incinerator as combustion air. , To supply hot air to the dryer to dry used paper diapers, that is, to use the heat of the exhaust gas from the waste incinerator to dry, so to generate hot air to be supplied to the dryer. The hot air generator provided in the above is not required, the device configuration can be made compact without using fuel, CO ₂ emissions due to fossil fuel and combustion can be eliminated, and fuel costs can be eliminated. The effect is obtained. In addition to this, the dry exhaust gas with odor discharged from the dryer is supplied to the combustion chamber of the waste incinerator together with the combustion air, so that the odorous components are thermally decomposed in the combustion chamber and the dry exhaust gas is deodorized in the incinerator. Therefore, it is not necessary to separately install a deodorizing device equipped with a deodorizing agent or a thermal decomposition incinerator for burning fuel, the device configuration can be made compact, the equipment cost can be reduced, and the operating cost can be reduced because there is no need to use fuel. Get the effect of being able to.

According to the fifth invention using the paper diaper drying apparatus of the first to fourth inventions and the tenth invention using the paper diaper drying method of the sixth to ninth inventions, the dried product obtained by drying and deodorizing the paper diaper is used alone. , Or by mixing with other waste and molding, the effect that it can be used as a fuel is obtained.

It is a block diagram which shows the outline structure of the 1st Embodiment apparatus of this invention. FIG. 1 is a configuration diagram of the device. It is a block diagram which shows the outline structure of the 2nd Embodiment apparatus of this invention. FIG. 3 is a configuration diagram of the device. It is a block diagram which shows the outline structure of the 3rd Embodiment apparatus of this invention. FIG. 5 is a configuration diagram of the device.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
FIG. 1 is a block diagram showing an outline configuration of the first embodiment device of the present invention, and FIG. 2 is a schematic configuration diagram of the apparatus of FIG.

As seen in FIG. 1, the apparatus of the present embodiment is connected to a waste incinerator 1 (hereinafter, incinerator 1) that incinerates waste, and steam generated by heat recovery of exhaust gas from the incinerator 1 in the boiler 2. It has a steam type air preheater 3 as a high temperature air producing device, a dryer 4 for drying paper diapers, and a combustion air supply line 5 for supplying combustion air to the incinerator 1. The dry exhaust gas supply line 50 is connected to the combustion air supply line 5 so as to receive the dry exhaust gas discharged from the dryer 4 and join the combustion air supplied to the incinerator 1. Air taken in from the outside and a part of high temperature air produced by the steam type air preheater 3 are supplied to the combustion air supply line 5 to become combustion air, and the dry exhaust gas supply line 50 It is supplied to the incinerator 1 together with the dry exhaust gas that merges with the air.

In the boiler 2, the water supplied from the outside is heated by heat exchange with the exhaust gas from the incinerator 1 to become steam, and the steam is sent to the steam type air preheater 3 and sent to the steam type air preheater 3. The air sent from the outside is heated by heat exchange with steam to become high-temperature air, which is sent to the dryer 4. The exhaust gas cooled by heat exchange with water in the boiler 2 is discharged to the downstream side, and the steam drain cooled by heat exchange with air in the steam type air preheater 3 is discharged.

In the dryer 4, the untreated paper diaper is thrown in, the paper diaper is dried by high temperature air and discharged as a dried product, and the dry exhaust gas containing odor is discharged from the dryer 4, and the dry exhaust gas is discharged from the dry exhaust gas supply line 50. Is supplied to the combustion air supply line 5, and is supplied to the incinerator 1 together with the combustion air including the air from the outside and a part of the high temperature air from the steam type air preheater 3.

Next, the configuration of the present embodiment device shown in the block diagram of FIG. 1 will be described more specifically with reference to FIG. In FIG. 2, the reference numerals used in FIG. 1 are used as they are for the corresponding parts (devices).

In FIG. 2, the incinerator 1 is installed adjacent to the waste pit 6 that stores the waste W. The waste pit 6 has a waste take-out part 6B projecting laterally at the upper part of the pit main body 6A, and the waste take-out part 6B has a part of waste W from the pit main body 6A. A bucket crane 6C for taking out the waste is provided. Further, the waste taking-out portion 6B is provided with an air suction port 6D for taking out the air in the waste pit 6 to the outside.

The incinerator 1 is a combustion that incinerates a chute 1A having a charging port 1A-1 at the upper end for receiving a drop-in of the waste W from the bucket crane 6C of the waste pit 6 and a waste W thrown into the chute 1A. It has a chamber 1B. A grate 1C is provided below the combustion chamber 1B, and the waste W on the grate 1C moves downstream (to the right in FIG. 2) by the grate 1C. There is. A wind box 1D is provided in the lower part of the grate 1C so that combustion air can be taken in from below. An incinerator ash discharge port 1E for discharging the incinerator ash after incineration of the waste W is provided in the lower part of the downstream end of the combustion chamber 1B.

In the combustion chamber 1B of the incinerator 1, a boiler 2 for recovering the heat of the exhaust gas to generate steam is continuously installed. The boiler 2 has a radiant heat transfer chamber 2A on the upstream side and a convection heat transfer chamber 2B in which a plurality of heat transfer tubes are arranged on the downstream side. The steam generated in the boiler 2 is sent to a steam turbine (not shown) to be used for power generation, or used as a heat source for equipment in an incinerator facility. The exhaust gas outlet 2C of the boiler 2 is connected to the exhaust gas treatment facility 7, and the exhaust gas is detoxified by the exhaust gas treatment facility 7 and then sent to the chimney 9 by the attraction blower 8 and sent from the chimney 9 to the atmosphere. It is released.

The present embodiment also includes a steam-type air preheater 3 and a dryer 4 that receives high-temperature air from the steam-type air preheater 3 to dry the untreated disposable diapers.

The steam type air preheater 3 receives the air in the waste pit 6 from the pipe 13 by the blower 12 through the pipe 11 connected to the air suction port 6D of the waste pit 6. The pipeline 11 is provided with an air flow meter F1 and a damper D1 for adjusting the air flow rate, and the opening degree of the damper D1 is adjusted based on the measured value of the air flow meter F1 to adjust the air flow rate. NS. A damper D2 is also provided in the pipeline 13, and the opening degree of the damper D2 is adjusted as described later. The air from the conduit 11 is sent by the blower 12 to the steam air preheater 3 via the conduit 13 and the damper D2. The steam type air preheater 3 receives the air in the waste pit 6 from the conduit 11 and sends high-temperature steam from the convection heat transfer chamber 2B via the conduit 14 connected to the convection heat transfer chamber 2B. It is supposed to receive. The pipeline 14 is provided with a regulating valve V1 for adjusting the amount of steam. Thus, in the steam type air preheater 3, the air received from the pipe line 11 through the pipe line 13 is converted into high temperature air by heat exchange with the steam from the pipe line 14, and the lowered steam is discharged as the steam drain 15.

The dryer 4 has a dryer main body 4A and a control panel 4B, and the dryer main body 4A receives and crushes the used and unprocessed paper diaper P1 and uses the high temperature air from the steam type air preheater 3 to crush the paper diaper. P1 is dried and deodorized and discharged as a dried product P2, and the control panel 4B grasps the situation inside the dryer main body 4A and controls this situation. The pipeline 16 connecting the steam type air preheater 3 and the dryer 4 is branched from the middle to provide a conduit 17, and each of the pipelines 17 is located in the lower part of the combustion chamber 1B of the incinerator 1. It is connected to the air box 1D, and a part of the high temperature air from the steam type air preheater 3 is supplied to the air box 1D as a part of the combustion air.

A pipe line 18 branched from the pipe line 13 is connected to the pipe line 17, and a part of the air from the blower 12 flows into the pipe line 17 through the pipe line 18 as a part of the combustion air. It is designed to supply to the wind box 1D. A damper D3 for adjusting the flow rate of air is provided in the pipeline 18. The combustion air supply line 5 is formed by the conduit 17 and the conduit 18, and the high temperature air flowing through the conduit 17 and the normal temperature air flowing through the conduit 18 are mixed and adjusted to a predetermined temperature to be adjusted to a predetermined temperature, and the air box is used as combustion air. It is supplied to the combustion chamber 1B via 1D.

The dryer 4 is provided with a dry exhaust gas supply line 50 that discharges dry exhaust gas after drying and deodorizing the disposable diaper P1, and the dry exhaust gas supply line 50 is connected to the pipeline 17 at a connection point Q. Has been done. From the dry exhaust gas supply line 50, the dry exhaust gas merges with the combustion air in which the high temperature air flowing through the pipeline 17 and the normal temperature air flowing through the pipeline 18 are mixed and supplied to the air box 1D, and is supplied to the combustion chamber 1B. Is supplied to. The odorous component contained in the dry exhaust gas is decomposed and deodorized in the combustion chamber 1B.

The dry exhaust gas supply line 50 is provided with a blower 19 and a damper D4, and the flow rate of the dry exhaust gas extracted from the dryer 4 by the blower 19 and merged with the combustion air is based on the command of the control panel 4B. Is adjusted by. Specifically, in the control panel 4B, both the temperature inside the dryer main body 4A and the duration of the temperature sufficient for drying the paper diaper P1 are monitored, and when both are not sufficient, the opening degree of the damper D4 is increased. The flow rate of the dry exhaust gas extracted from the dryer 4 is increased to increase the inflow of high-temperature air from the steam air preheater 3 into the dryer 4.

In the present embodiment, the combustion air thermometer T1 is further located in the downstream portion 17A from the connection point Q in the pipeline 17 forming a part of the combustion air supply line 5, and the steam is in the vicinity of the outlet of the steam type air preheater 3 in the pipeline 16. A type air preheater outlet thermometer T2 is provided, and room temperature air is controlled by controlling the opening degree of the damper D2 and the damper D3 so that the combustion air temperature is within a predetermined range based on the measured value of the combustion air thermometer T1. Combustion air temperature control device 21 that controls the flow rate of high-temperature air, and control valve V1 that controls the high-temperature air temperature within a predetermined range based on the measured values of the steam type air preheater outlet thermometer T2 to convection of the boiler. A high-temperature air temperature control device 22 for controlling the flow rate of steam supplied from the heat transfer chamber 2B to the steam type air preheater 3 via the conduit 14 is provided.

In such an apparatus of the present embodiment, the incineration treatment of waste and the dry deodorization treatment of used and untreated disposable diapers are performed according to the following procedure.

First, in the incinerator 1, the waste W dropped from the waste pit 6 to the chute 1A by the bucket crane 6C is supplied onto the grate 1C, receives the combustion air from the air box 1D, and is placed on the grate 1C. Is incinerated at. The high-temperature exhaust gas is brought to the boiler 2, and the incinerator ash is discharged to the outside of the furnace from the incinerator ash discharge port 1E.

The high-temperature exhaust gas is heat-exchanged in the boiler 2 by the radiant heat transfer chamber 2A and then by the convection heat transfer chamber 2B to generate steam. The cooled exhaust gas is detoxified by the exhaust gas treatment equipment 7, and then discharged from the chimney 9 to the atmosphere through the attracting blower 8.

The steam type air preheater 3 receives the air in the waste pit 6 sent by the blower 12 through the air suction port 6D, the pipe line 11, and the damper D1 through the pipe line 13 provided with the damper D2. On the other hand, the steam type air preheater 3 receives steam from the convection heat transfer chamber 2B via the conduit 14. The air from the conduit 13 is heated by heat exchange with the steam from the convection heat transfer chamber 2B to become high temperature air, and a part of the high temperature air is sent to the dryer 4 through the conduit 16 and the rest of the high temperature air. Is sent to the combustion chamber 1B as a part of the combustion air through the pipeline 17 of the combustion air supply line 5, and the steam cooled by this heat exchange is discharged as the steam drain 15.

In the dryer 4, the used paper diaper P1 before processing put into the dryer main body 4A is crushed and dried in contact with high temperature air from the steam type air preheater 3, and discharged as the processed dried product P2. The dry exhaust gas containing odor is supplied to the air box 1D of the incinerator 1 together with the combustion air through the dry exhaust gas supply line 50, and is supplied to the combustion chamber 1B.

In the dryer 4, both the temperature inside the dryer main body 4A and the duration of the temperature sufficient for drying the paper diaper P1 are monitored by the control panel 4B, and when both are not sufficient, the damper is commanded by the control panel 4B. By increasing the opening degree of D4, the flow rate of the dry exhaust gas extracted from the dryer 4 is increased to increase the inflow amount of the high temperature air from the steam type air preheater 3 into the dryer 4.

Further, the combustion air temperature control device 21 controls the opening degrees of the damper D2 and the damper D3 so that the combustion air temperature is within a predetermined range based on the measured value of the combustion air thermometer T1 to control the flow rates of normal temperature air and high temperature air. Will be done. Further, the flow rate of air in the pipeline 11 is maintained at an appropriate flow rate by adjusting the opening degree of the damper D1 based on the measured value of the air flow meter F1. Moreover,
The high temperature air temperature control device 22 controls the adjusting valve V1 so that the high temperature air temperature is within a predetermined range based on the measured value of the steam type air preheater outlet thermometer T2, and connects the conduit 14 from the convection heat transfer chamber 2B of the boiler. The steam flow rate supplied to the steam type air preheater 3 is controlled.

In the present embodiment, the dried product P2 discharged after the used disposable diaper is processed in the dryer can be used as fuel, and this may be supplied to the incinerator as fuel or sold outside as fuel. This often promotes the effective use of waste. The dried paper diaper P2 can be molded, or the dried paper diaper P2 and other waste can be mixed and molded to produce a fuel (referred to as a disposable diaper fuel).

When incinerating low-calorie waste in an incinerator, at present, auxiliary fuel such as city gas and petroleum is burned for the purpose of raising the temperature inside the incinerator, but fuel produced from dried paper diaper is used as auxiliary fuel. As a result, these auxiliary fuels are unnecessary or the amount used can be reduced, and the operating cost can be reduced.

Further, by supplying the paper diaper fuel to the waste combustion furnace and incinerating it, the thermal energy of the exhaust gas from the incinerator can be increased, the amount of boiler evaporation can be increased, and the amount of power generation can be increased.

Furthermore, by installing a used disposable diaper drying device or a disposable diaper fuel manufacturing device in the waste incinerator facility, it is not necessary to install a separate device for processing the used disposable diapers, and the processing cost can be reduced.

<Second embodiment>
FIG. 3 is a block diagram showing a schematic configuration of the device of the second embodiment of the present invention, and FIG. 4 is a schematic configuration diagram of the device of FIG.

As seen in FIG. 3, the present embodiment is characterized in that the boiler is removed from the first embodiment and the exhaust gas of the incinerator 1 is heat-exchanged with air by the combustion air preheater 3A to generate high temperature air. Is the same as in the first embodiment. Hereinafter, in FIGS. 3 and 4, the same parts as those in FIGS. 1 and 2 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 3, the exhaust gas from the incinerator 1 is introduced into the combustion air preheater 3A, and the air taken in from the outside becomes high temperature air by heat exchange with the exhaust gas and is sent to the dryer 4. The exhaust gas cooled by heat exchange with the air is discharged from the combustion air preheater 3A.

Next, the configuration of the present embodiment device shown in the block diagram of FIG. 3 will be described more specifically with reference to FIG. In FIG. 4, the reference numerals used in FIG. 3 are used as they are for the corresponding parts (devices).

In the present embodiment, the incinerator 1 is not continuously provided with a boiler, and the gas cooling chamber 1G is continuously provided on the exhaust gas outlet side of the incinerator 1. A heat transfer tube for circulating air is arranged downstream of the gas cooling chamber 1G, and a combustion air preheater 3A that heats the air by exchanging heat with the exhaust gas from the gas cooling chamber 1G to preheat the combustion air is connected. It is installed. Since the exhaust gas from the incinerator 1 is introduced into the combustion air preheater 3A, the gas is used to lower the temperature of the exhaust gas to a temperature suitable for heat exchange in the combustion air preheater 3A. A water injection nozzle 1F for injecting water into the cooling chamber 1G is provided. The exhaust gas cooled to a predetermined temperature by the injection of cold water from the cold water nozzle 1F flows into the combustion air preheater 3A. The combustion air preheater 3A receives the air in the waste pit 6 from the pipe 13 by the blower 12 through the pipe 11 connected to the air suction port 6D of the waste pit 6. The pipeline 11 is provided with an air flow meter F1 and a damper D1 for adjusting the air flow rate, and the opening degree of the damper D1 is adjusted based on the measured value of the air flow meter F1 to adjust the air flow rate. NS. Thus, the air introduced into the combustion air preheater 3A from the pipeline 13 is heated by heat exchange with the exhaust gas to become high temperature air. The exhaust gas cooled by heat exchange with the air in the combustion air preheater 3A is sent from the exhaust gas outlet 2C to the exhaust gas treatment facility 7, detoxified as in the case of the first embodiment, and discharged from the chimney 9 to the atmosphere. Will be done. The combustion air preheater 3A is connected to the dryer 4 via the pipe line 17 and the pipe line 16. A part of the high temperature air is sent to the dryer 4 via the pipe line 17 and the pipe line 16. The dryer 4 has a dryer main body 4A and a control panel 4B, and the dryer main body 4A receives and crushes the used and unprocessed paper diaper P1 and uses the high temperature air from the combustion air preheater 3A to crush the paper diaper. P1 is dried and deodorized and discharged as a dried product P2, and the control panel 4B grasps the situation inside the dryer main body 4A and controls this situation.

A pipeline 17 is connected to the combustion air preheater 3A, and a downstream portion 17A of the pipeline 17 is connected to each air box 1D located below the combustion chamber 1B of the incinerator 1, and the combustion air preheater 3A A part of the high temperature air from the above air box 1D is supplied to the combustion chamber 1B as a part of the combustion air. A pipe line 18 branched from the pipe line 13 is connected to the pipe line 17A, and a part of the air from the waste pit 6 sent by the blower 12 is sent to the pipe line 17A via the pipe line 18. It is made to flow in and is supplied as a part of combustion air to the combustion chamber 1B via the air box 1D. The combustion air supply line 5 is formed by the conduit 17, the conduit 17A, and the conduit 18, and the high temperature air flowing through the conduit 17 and the normal temperature air flowing through the conduit 18 are mixed and adjusted to a predetermined temperature for combustion. It is supplied as air to the combustion chamber 1B via the air box 1D. The pipeline 18 is provided with a damper D3 that adjusts the flow rate of air at room temperature that is taken in from the waste pit 6 and forms a part of the combustion air. Further, a combustion air thermometer T1 is provided in 17A forming a part of the combustion air supply line 5, and the opening degree of the damper D3 is set so that the combustion air temperature is within a predetermined range based on the measured value of the combustion air thermometer T1. Is designed to control the flow rate of normal temperature air.

The dryer 4 is provided with a dry exhaust gas supply line 50 for discharging the dry exhaust gas after drying and deodorizing the disposable diaper P1, and the dry exhaust gas supply line 50 is connected to the pipeline 17A. From the dry exhaust gas supply line 50, the dry exhaust gas merges with the combustion air in which the high temperature air flowing through the pipeline 17 and the normal temperature air flowing through the pipeline 18 are mixed and supplied to the air box 1D, and is supplied to the combustion chamber 1B. Is supplied to. The odorous component contained in the dry exhaust gas is decomposed and deodorized in the combustion chamber 1B.

The dry exhaust gas supply line 50 is provided with a blower 19 and a damper D4, and the flow rate of the dry exhaust gas extracted from the dryer 4 by the blower 19 and merged with the combustion air is based on the command of the control panel 4B. Is adjusted by. Specifically, in the control panel 4B, both the temperature inside the dryer main body 4A and the duration of the temperature sufficient for drying the paper diaper P1 are monitored, and when both are not sufficient, the opening degree of the damper D4 is increased. The flow rate of the dry exhaust gas extracted from the dryer 4 is increased to increase the inflow of high-temperature air from the combustion air preheater 3A into the dryer 4.

<Third Embodiment>
FIG. 5 is a block diagram showing a schematic configuration of the device of the third embodiment of the present invention, and FIG. 6 is a schematic configuration diagram of the device of FIG.

In this embodiment, as seen in FIG. 5, the residual heat recovery air heater 30 is arranged between the combustion air preheater 3A and the dryer 4 with respect to the second embodiment, and the residual heat recovery air heater The feature is that the high temperature air from 30 is sent to the dryer 4 and the high temperature air is sent to the hot water generation heat exchanger 32 for supplying hot water to the hot water usage destination 31 and used for hot water generation. Others are the same as in the second embodiment. Hereinafter, in FIGS. 5 and 6, the same parts as those in FIGS. 3 and 4 of the second embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the present embodiment, as seen in FIG. 5, residual heat recovery air that receives exhaust gas from the combustion air preheater 3A between the combustion air preheater 3A and the dryer 4 and heats the air from the outside. A heater 30 is provided.

Further, the residual heat recovery air heater 30 is connected to the dryer 4, and a part of the high temperature air generated by the residual heat recovery air heater 30 is supplied to the dryer 4 for drying the paper diaper, and the temperature is high. It is connected to the hot water generating heat exchanger 32 so as to send the rest of the air to the hot water generating heat exchanger 32 for supplying hot water to the hot water utilization destination 31. Hot water circulates between the hot water utilization destination 31 and the hot water generating heat exchanger 32, and the hot water rises by heat exchange with the high temperature air from the residual heat recovery air heater 30 in the hot water generating heat exchanger 32. It is supposed to be warmed up.

Thus, in the hot water generation heat exchanger 32, the returned hot water used in the hot water use destination 31 and lowered in temperature rises by heat exchange with the high temperature air, and is used again in the hot water use destination 31. The air that has been cooled down after being heated by the return hot water is discharged as it is.

Next, the configuration of the present embodiment device shown in the block diagram of FIG. 5 will be described more specifically with reference to FIG. In FIG. 6, the reference numerals used in FIG. 5 are used as they are for the corresponding parts (devices).

As can be seen in FIG. 6, a boiler is not continuously installed in the incinerator 1, and a gas cooling chamber 1G is continuously installed on the exhaust gas outlet side of the incinerator 1. A heat transfer tube for circulating air is arranged downstream of the gas cooling chamber 1G, and a combustion air preheater 3A that heats the air by exchanging heat with the exhaust gas from the gas cooling chamber 1G to preheat the combustion air is connected. It is installed. Further, a residual heat recovery air heater 30 is arranged downstream of the combustion air preheater 3A. Since the exhaust gas from the incinerator 1 is introduced into the combustion air preheater 3A, the gas is used to lower the temperature of the exhaust gas to a temperature suitable for heat exchange in the combustion air preheater 3A. A water injection nozzle 1F for injecting water into the cooling chamber 1G is provided. The exhaust gas cooled to a predetermined temperature by the injection of cold water from the cold water nozzle 1F flows into the combustion air preheater 3A. The combustion air preheater 3A receives the air in the waste pit 6 from the pipe 13 by the blower 12 through the pipe 11 connected to the air suction port 6D of the waste pit 6. The pipeline 11 is provided with an air flow meter F1 and a damper D1 for adjusting the flow rate of air. Thus, the air introduced into the combustion air preheater 3A from the pipeline 13 is heated by heat exchange with the exhaust gas to become high temperature air. ..

The exhaust gas cooled by heat exchange with the air in the combustion air preheater 3A is sent to the residual heat recovery air heater 30, and the retained residual heat is recovered and used for producing high-temperature air. A pipe line 36 is connected to the residual heat recovery air heater 30, and the flow rate of the air taken in from the air intake 33 is adjusted by the damper 34 and sent to the residual heat recovery air heater 30 via the pipe line 36 by the blower 35. It has become like. In the residual heat recovery air heater 30, the air is heat-exchanged with the exhaust gas sent from the combustion air preheater 3A to generate high-temperature air. The exhaust gas cooled by heat exchange with the air in the residual heat recovery air heater 30 is sent from the exhaust gas outlet 2C to the exhaust gas treatment facility 7, detoxified as in the case of the first embodiment, and discharged from the chimney 9 to the atmosphere. Will be done.

In the second embodiment, unlike the high temperature air sent from the combustion air preheater 3A to the dryer 4 for drying the paper diaper, in the third embodiment, the high temperature air is piped from the residual heat recovery air heater 30. It is sent to the dryer 4 for drying the paper diaper via the road 37 and the pipeline 37A. The dryer 4 has a dryer main body 4A and a control panel 4B, and the dryer main body 4A receives and crushes the used and unprocessed paper diaper P1 and uses the high temperature air from the residual heat recovery air heater 30 to crush the paper diaper. P1 is dried and deodorized and discharged as a dried product P2, and the control panel 4B grasps the situation inside the dryer main body 4A and controls this situation.

A part of the high-temperature air from the residual heat recovery air heater 30 is supplied to the dryer 4, and the rest of the high-temperature air is supplied to the hot water usage destination 31 via the pipeline 37. It is sent to the hot water generation heat exchanger 32. Hot water is circulated by the pump 38 between the hot water utilization destination 31 and the hot water generating heat exchanger 32, and the hot water generating heat exchanger 32 exchanges heat with the high temperature air from the residual heat recovery air heater 30. The temperature of hot water is increased. Thus, in the hot water generation heat exchanger 32, the returned hot water used at the hot water use destination 31 and lowered in temperature rises by heat exchange with the high temperature air, and is used again at the hot water use destination 31. The air that has been cooled down after being subjected to heating of the return hot water is discharged as it is through the conduit 37B.

A pipeline 17 is connected to the combustion air preheater 3A, and a downstream portion 17A of the pipeline 17 is connected to each air box 1D located below the combustion chamber 1B of the incinerator 1, and the combustion air preheater 3A The preheated high-temperature air from the above is supplied to the combustion chamber 1B via the air box 1D as a part of the combustion air. A pipe line 18 branched from the pipe line 13 is connected to the pipe line 17A, and a part of the air at room temperature from the waste pit 6 sent by the blower 12 is passed through the pipe line 18 to the pipe line. It flows into 17A, passes through the air box 1D, and is supplied to the combustion chamber 1B as a part of the combustion air. A damper D3 for adjusting the flow rate of air is provided in the pipeline 18. The combustion air supply line 5 is formed by the conduit 17, the conduit 17A, and the conduit 18, and the high temperature air flowing through the conduit 17 and the normal temperature air flowing through the conduit 18 are mixed and adjusted to a predetermined temperature for combustion. It is supplied as air to the combustion chamber 1B via the air box 1D. The pipeline 18 is provided with a damper D3 that adjusts the flow rate of air at room temperature that is taken in from the waste pit 6 and forms a part of the combustion air. Further, a combustion air thermometer T1 is provided in 17A forming a part of the combustion air supply line 5, and the opening degree of the damper D3 is set so that the combustion air temperature is within a predetermined range based on the measured value of the combustion air thermometer T1. Is designed to control the flow rate of normal temperature air.

The dryer 4 is provided with a dry exhaust gas supply line 50 for discharging the dry exhaust gas after drying and deodorizing the disposable diaper P1, and the dry exhaust gas supply line 50 is connected to the pipeline 17A. From the dry exhaust gas supply line 50, the dry exhaust gas merges with the combustion air in which the high temperature air flowing through the pipeline 17 and the normal temperature air flowing through the pipeline 18 are mixed and supplied to the air box 1D, and is supplied to the combustion chamber 1B. Is supplied to. The odorous component contained in the dry exhaust gas is decomposed and deodorized in the combustion chamber 1B.

The dry exhaust gas supply line 50 is provided with a blower 19 and a damper D4, and the flow rate of the dry exhaust gas extracted from the dryer 4 by the blower 19 and merged with the combustion air is controlled by the control panel 4.
It is adjusted by the damper D4 based on the command of B. Specifically, in the control panel 4B, both the temperature inside the dryer main body 4A and the duration of the temperature sufficient for drying the paper diaper P1 are monitored, and when both are not sufficient, the opening degree of the damper D4 is increased. The flow rate of the dry exhaust gas extracted from the dryer 4 is increased to increase the inflow amount of the high temperature air from the residual heat recovery air heater 30 into the dryer 4.

The dry exhaust gas supply line 50 is provided with a dry exhaust gas flow meter F2, and measures the dry exhaust gas flow rate discharged from the dryer 4 and sent to the combustion chamber 1B. The pipeline 11 is provided with an air flow meter F1 and a damper D1 for adjusting the flow rate of air. The air flow meter F1 measures the flow rate of air sent to the combustion air preheater 3A and the residual heat recovery air heater 30. The opening degree of the damper D1 of the pipeline 11 is controlled by the control device 39 by using the measured value of the air flow meter F1 and the measured value of the dry exhaust gas flow meter F2.

In the second embodiment and the third embodiment, as in the case of the first embodiment, the dried product P2 discharged after the used disposable diapers are processed in the dryer can be used as fuel, and this can be used as an incinerator. It may be supplied as fuel to the waste, or it may be sold externally as fuel, thereby promoting the effective use of waste.

When incinerating low-calorie waste in an incinerator, at present, auxiliary fuel such as city gas and petroleum is burned for the purpose of raising the temperature inside the incinerator, but fuel produced from dried paper diaper is used as auxiliary fuel. As a result, these auxiliary fuels are unnecessary or the amount used can be reduced, and the operating cost can be reduced.

Furthermore, by installing a used disposable diaper drying device or a disposable diaper fuel manufacturing device in the waste incinerator facility, it is not necessary to install a separate device for processing the used disposable diapers, and the processing cost can be reduced.

1 (Waste) Incinerator 2 Boiler 3 Steam type air preheater 3A Combustion air preheater 4 Dryer 50 Dry exhaust gas supply line 30 Residual heat recovery air heater 31 Hot water usage destination 32 Hot water generation heat exchanger P1 (used) Paper diaper P2 Dry matter W Waste

Claims (10)

A high-temperature air production device that recovers heat from exhaust gas discharged from a waste incinerator to produce high-temperature air, and a dryer that receives high-temperature air supply from the high-temperature air production device to dry used paper diapers.
It is equipped with a dry exhaust gas supply line that receives dry exhaust gas containing odorous components from the dryer and joins the combustion air supplied to the combustion chamber of the waste incinerator.
The dry exhaust gas supply line is equipped with a damper to adjust the flow rate of dry exhaust gas.
The dryer has a control panel
The control panel monitors both the temperature inside the dryer and the duration of the temperature sufficient to dry the used paper diaper, and when both are not sufficient for the predetermined value, issues a command to increase the opening of the damper. A paper diaper dryer characterized by increasing the flow rate of dry exhaust gas extracted from the dryer to increase the inflow of high-temperature air from the high-temperature air production device into the dryer. A steam-type air preheater that produces high-temperature air by exchanging heat with steam generated by a boiler that recovers heat from the exhaust gas discharged from a waste incinerator, and a used paper diaper that receives high-temperature air supply from the steam-type air preheater. It is equipped with a dryer that dries the air and a dry exhaust gas supply line that receives dry exhaust gas containing odorous components from the dryer and joins it with the combustion air supplied to the combustion chamber of the waste incinerator.
The steam type air preheater supplies a part of the produced high temperature air to the dryer and the rest of the high temperature air to the combustion chamber of the waste incinerator as a part of the combustion air .
The dry exhaust gas supply line is equipped with a damper to adjust the flow rate of dry exhaust gas.
The dryer has a control panel
The control panel monitors both the temperature inside the dryer and the duration of the temperature sufficient to dry the used paper diaper, and when both are not sufficient for the predetermined value, issues a command to increase the opening of the damper. A paper diaper dryer characterized by increasing the flow rate of dry exhaust gas extracted from the dryer to increase the inflow of high-temperature air from the steam air preheater into the dryer. A combustion air preheater that produces high-temperature air by exchanging heat with exhaust gas discharged from a waste incinerator, a dryer that receives high-temperature air from the combustion air preheater to dry used paper diapers, and a dryer. It is equipped with a dry exhaust gas supply line that receives dry exhaust gas containing odorous components and joins the combustion air supplied to the combustion chamber of the waste incinerator.
The combustion air preheater supplies a part of the produced high-temperature air to the dryer and the rest of the high-temperature air to the combustion chamber of the waste incinerator as a part of the combustion air .
The dry exhaust gas supply line is equipped with a damper to adjust the flow rate of dry exhaust gas.
The dryer has a control panel
The control panel monitors both the temperature inside the dryer and the duration of the temperature sufficient to dry the used paper diaper, and when both are not sufficient for the predetermined value, issues a command to increase the opening of the damper. A paper diaper dryer characterized by increasing the flow rate of dry exhaust gas extracted from the dryer to increase the inflow of high-temperature air from the combustion air preheater into the dryer. High temperature due to heat exchange between the combustion air preheater that produces high temperature air for combustion by heat exchange with the exhaust gas discharged from the waste incinerator and the exhaust gas that is arranged on the downstream side of the combustion air preheater and has residual heat. A residual heat recovery air heater that produces air, a dryer that receives high-temperature air from the residual heat recovery air heater to dry used paper diapers, and a dryer that receives dry exhaust gas containing odorous components and burns the waste incinerator. Equipped with a dry exhaust gas supply line that joins the combustion air supplied to the room
The combustion air preheater supplies the manufactured high-temperature combustion air to the combustion chamber of the waste incinerator as part of the combustion air .
The dry exhaust gas supply line is equipped with a damper to adjust the flow rate of dry exhaust gas.
The dryer has a control panel
The control panel monitors both the temperature inside the dryer and the duration of the temperature sufficient to dry the used paper diaper, and when both are not sufficient for the predetermined value, issues a command to increase the opening of the damper. A paper diaper dryer characterized by increasing the flow rate of dry exhaust gas extracted from the dryer to increase the inflow of high-temperature air from the residual heat recovery air heater into the dryer. A fuel manufacturing apparatus for producing fuel by molding a used disposable diaper to be dried by the disposable diaper drying apparatus according to any one of claims 1 to 4 by itself or by mixing it with other waste. The exhaust gas discharged from the waste incinerator is heat-recovered by the high-temperature air production equipment to produce high-temperature air, and the used paper diapers are supplied with high-temperature air from the high-temperature air production equipment and dried by the dryer, and the dry exhaust gas supply line. After that, the dry exhaust gas containing the odorous component from the dryer is mixed with the combustion air and supplied to the combustion chamber of the waste incinerator.
The control panel of the dryer monitors both the temperature inside the dryer and the duration of the temperature sufficient for drying the used paper diaper, and when both are not sufficient for the predetermined value, it is provided in the dry exhaust gas supply line. Issue a command to increase the opening of the damper to adjust the flow rate of dry exhaust gas, increase the flow rate of dry exhaust gas extracted from the dryer, and increase the amount of inflow of high temperature air from the high temperature air production equipment into the dryer. A method of drying a paper diaper, which is characterized by allowing the air to be dried. High-temperature air is produced by exchanging heat between steam and air generated in a boiler that recovers heat from exhaust gas discharged from a waste incinerator with a steam-type air preheater, and used with high-temperature air from the steam-type air preheater. The finished paper diaper is dried with a dryer, and the dry exhaust gas containing odorous components from the dryer is supplied to the combustion chamber of the waste incinerator together with the combustion air through the dry exhaust gas supply line, and the high temperature produced by the steam type air preheater. A part of the air is supplied to the dryer, and the rest of the high temperature air is supplied to the combustion chamber of the waste incinerator as a part of the combustion air .
The control panel of the dryer monitors both the temperature inside the dryer and the duration of the temperature sufficient for drying the used paper diaper, and when both are not sufficient for the predetermined value, it is provided in the dry exhaust gas supply line. Issue a command to increase the opening of the damper to adjust the flow rate of dry exhaust gas, increase the flow rate of dry exhaust gas extracted from the dryer, and increase the inflow of high-temperature air from the steam air preheater into the dryer. A method of drying paper diapers, characterized by increasing. High-temperature air is produced by exchanging heat between the exhaust gas discharged from the waste incinerator and air with a combustion air preheater, and the used paper diapers are dried with a dryer using the high-temperature air from the combustion air preheater. Through the dry exhaust gas supply line, dry exhaust gas containing odorous components from the dryer is supplied to the combustion chamber of the waste incinerator together with combustion air, and a part of the high temperature air produced by the combustion air preheater is supplied to the dryer. At the same time, the rest of the high temperature air is supplied to the combustion chamber of the waste incinerator as a part of the combustion air.
The control panel of the dryer monitors both the temperature inside the dryer and the duration of the temperature sufficient for drying the used paper diaper, and when both are not sufficient for the predetermined value, it is installed in the dry exhaust gas supply line. Issue a command to increase the opening of the damper to adjust the flow rate of dry exhaust gas, increase the flow rate of dry exhaust gas extracted from the dryer, and increase the inflow of high temperature air from the combustion air preheater to the dryer. A method of drying paper diapers, characterized by increasing. High-temperature combustion air is produced by exchanging heat between the exhaust gas discharged from the waste incinerator and air with a combustion air preheater, and the exhaust gas and air that have residual heat of the exhaust gas from the combustion air preheater are preheated. High-temperature air is produced by exchanging heat with the recovery air heater, and the used paper diapers are dried with the high-temperature air from the residual heat recovery air heater, and the odorous components from the dryer are removed via the dry exhaust gas supply line. The dry exhaust gas containing is supplied to the combustion chamber of the waste incinerator together with the combustion air, and the high temperature combustion air produced by the combustion air preheater is supplied to the combustion chamber of the waste incinerator as a part of the combustion air .
The control panel of the dryer monitors both the temperature inside the dryer and the duration of the temperature sufficient for drying the used paper diaper, and when both are not sufficient for the predetermined value, it is provided in the dry exhaust gas supply line. Issue a command to increase the opening of the damper to adjust the flow rate of dry exhaust gas, increase the flow rate of dry exhaust gas extracted from the dryer, and increase the inflow of high-temperature air from the residual heat recovery air heater into the dryer. A method of drying paper diapers, characterized by increasing. A fuel manufacturing method for producing a fuel by molding a used disposable diaper to be dried by the paper diaper drying method according to any one of claims 6 to 9 by itself or by mixing with other wastes.

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