JPH0743106B2 - Equipment for drying and incinerating livestock manure - Google Patents

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention is to incinerate animal dung discharged from livestock farms, high-humidity waste products with high phosphorus content such as human sewage treatment sludge generated at sewage treatment plants by drying and incineration. Drying of livestock manure, etc. , which has a treatment process layout and equipment system that minimizes heat loss while recovering ash resources
-Regarding incineration treatment equipment .

[0002]

2. Description of the Related Art Conventionally, livestock manure discharged from livestock farms has been partially returned to the field as fertilizer, but most of the rest and those that are not suitable as fertilizer as they are, are dried or deposited by fermentation. Either processed or dumped at the final disposal site.

Further, the sludge treated with human waste generated at the sewage treatment plant may be processed into fertilizer, but most of it has been incinerated. As a technique for drying and incinerating high-humidity sludge typified by these, a drying and incineration system that combines a dryer and an incinerator is known. In this case, there are various incinerators such as a multi-stage incinerator, a fluidized bed type, a fixed bed type or a rotary bed type incinerator, and the same applies to a dryer or a drying oven.

The technical developments made in the above drying / incineration system are to improve the heat efficiency by improving the heat recovery technology including the invention of each furnace, improve the processing capacity by changing the processing process layout, and reduce the scattering amount. It was the subject.

[0005]

However, among these treatment techniques, especially as a drying / treatment device that exclusively treats livestock manure and the like , the treated product is safe, stabilized, and reduced in amount, and is a residue. I couldn't find any disclosure of flow sheets up to the point of recovering incinerated ash as a resource.

The present invention has been made in view of such circumstances, and is an energy saving type by heat recovery,
At the same time, we aim to make the processed materials safer, more stable, and less wasteful.
New livestock manure, etc. that recovers the treated incineration ash that is the residue as a resource
It is an object of the present invention to provide a drying / incineration treatment device for

[0007]

In order to achieve the above object, the present invention provides a drying and incineration treatment apparatus for livestock manure, etc.
A dryer that pre-drys the object to be processed that is supplied from the raw material feeder to the input hopper by conveyor transfer to a moisture content that can burn itself, and the dry exhaust gas that is introduced into the pipe and the product dry product that is transferred and supplied to the input screw by the dry product conveyor. An incinerator equipped with a self-burning auxiliary burner and a deodorizing burner is installed ,
Direct the dried exhaust gas to the incinerator and self-burn the object to be treated after preliminary drying.
It is consumed to replenish the amount of heat for
Introduced in the jacket of the dryer and newly accepted
Heat is consumed as a heat source for drying the product, and after passing through the jacket
The combustion exhaust gas is guided to the heat exchanger via the dust collection cyclone.
It is consumed for preheating the outside air and sends the preheated outside air to the inner cylinder of the dryer.
It is characterized by being equipped with a heat recovery mechanism consisting of a circulating system .

[0008]

In the above-described drying / incineration apparatus of the present invention, the high-humidity waste treatment product is dried to a moisture content that can be self-combusted by the dryer, and after being put into the incinerator, the piping of this dry exhaust gas is introduced and only ignition is performed. Do it by yourself. Here, the auxiliary burner for igniting corresponds to the fluctuation of the calorific value during incineration. The dry exhaust gas is also a malodorous gas, which is burned at a high temperature by a deodorizing burner to decompose the malodorous substance.
Next, the combustion exhaust gas is guided to the jacket of the dryer to recover heat, and further, heat is exchanged via the dust collecting cyclone, and preheated outside air is delivered / supplied to the dryer inner cylinder as a heat source for drying. Energy can be saved by incorporating heat recovery by drying / self-combustion incineration of this high-humidity waste treatment and circulation supply of combustion exhaust gas into the equipment system.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An optimum embodiment of the present invention will be described below with reference to the accompanying drawings. Figure 1 shows the drying and incineration facility for livestock manure .
It is an example of a flow sheet of the abduction . Optimal profit
The place of use was as a device for drying and incinerating chicken manure.
Pollution-free treatment of treated material (chicken dung) and treatment of charcoal-containing material
This is an attempt to recover the ash resources.

In the figure, livestock manure etc. as raw materials (hereinafter,
It is called raw material sludge. ) Is stored in the raw material feeder (1).
This raw material sludge is transferred from the raw material feeder (1) to the input hopper (3) of the dryer (4) by the raw material conveyor (2). Here, the raw material feeder (1) is configured such that the supply amount can be arbitrarily selected by a screw with a variable motor, and a target supply amount can be set.

The input raw material sludge is dried from high humidity of about 70 to 85% to about 20 to 30%, that is, to a moisture content capable of self-combustion, and a dry product conveyor (6).
Is discharged to. Here, since the drying is performed by recovering the heat of the combustion exhaust gas described later, it is not necessary to supply the amount of heat from the outside.

The pre-dried raw material sludge is transferred to the input screw (7) by the dry product conveyor (6) and is input to the incinerator (8). In the incinerator, since the raw material sludge self-combusts, it suffices to consume the fuel only at the time of ignition, but the auxiliary burner (9) for coping with this ignition and the fluctuation of the calorific value.
And a deodorizing burner (10) for ensuring the deodorizing temperature.

The incinerated ash is temporarily stored in the ash hopper by the incinerated ash discharge screw (11) and is regularly taken out to the outside.

On the other hand, dry exhaust gas (malodorous gas) is introduced into the incinerator (8) through an exhaust fan (15) and is deodorized at high temperature in the furnace. Next, the combustion exhaust gas in the furnace is introduced from the exhaust port (12) into the jacket section (5) of the dryer (4) through a pipe to recover heat, and is also guided to the dust collecting cyclone (13) and further to the heat exchanger. The air is preheated by the pushing fan (16) via the (14) and is sent out and supplied to the inner cylinder of the dryer (4) as a drying heat source. The combustion exhaust gas from which the heat has been recovered in the heat exchanger (14) is separately discharged to the atmosphere from the chimney (17) via the exhaust fan (15).

It should be noted that, when the dryer (4) is stopped, the combustion exhaust gas is cut off from the exhaust port (12) to the jacket section (5) of the dryer (4) by a damper so as to be directly exposed to the atmosphere. Can be released.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made within the scope of protection of the present invention.

[0017]

According to the present invention, more than are those composed of configuration, <br/> drying and incineration layout treat exclusively livestock manure and the like as the material sludge According to this, the heat recovery mechanism, dry
Multi- stage heat utilization by circulating supply of dry exhaust gas and combustion exhaust gas
Because it is said that the equipment system incorporates the use (heat recovery) and the atmospheric release due to deodorization and dust removal, it is possible to achieve an energy-saving, pollution-free incineration process that minimizes heat loss.

Further, since the raw material sludge having a high phosphorus content such as livestock manure is self-combusted, it has a high economic efficiency in synergy with the above energy saving, and at the same time, the resource recovery of the phosphorus content in the incineration ash is intended. In addition, it contributes to the reduction of excess waste, and is extremely valuable in industrial use.

[Brief description of drawings]

FIG. 1 is a flow sheet of an apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 1 Raw material feeder 2 Raw material conveyor 3 Input hopper 4 Dryer 5 Jacket part 6 Dry product conveyor 7 Input screw 8 Incinerator 9 Auxiliary burner 10 Deodorizing burner 11 Exhaust screw 12 Exhaust port 13 Dust collection cyclone 14 Heat exchanger 15 Exhaust fan 16 Push-in Fan 17 chimney

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F23G 7/00 C 8409-3K

Claims (1)

[Claims] 1. An apparatus for drying and incinerating a high-humidity waste treatment product having a high phosphorus content such as livestock manure reserves up to self-combustible water for a substance to be treated supplied from a raw material feeder to a feeding hopper by conveyor transfer. A dryer for drying and an incinerator equipped with an auxiliary burner and a deodorizing burner for self-burning the produced dry product that is introduced into the screw by the dry product exhaust gas and transferred to the feeding screw by the dry product conveyor are installed to burn the dry exhaust gas.
Heat to guide the incinerator to self-burn the object to be treated after preliminary drying
The exhaust gas exhausted after deodorizing is consumed for replenishing
And a new heat source for the processed material
And heat transfer to consume the exhaust gas after passing through the jacket.
It is led to the heat exchanger via the dust cyclone and extinguished to preheat the outside air.
From the circulation system that costs and sends the preheated outside air to the inner cylinder of the dryer
Of a livestock dung etc. characterized by having a heat recovery mechanism
Drying / incineration processing equipment.