JPH0125360B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a simple generation device for carbonized gas,
In particular, the present invention relates to a carbonization gas generation device designed to easily generate carbonization gas by carbonization of used waste tires, thereby contributing to resource and energy conservation.

BACKGROUND OF THE INVENTION As the popularity of automobiles increases dramatically today, used tires are being disposed of in large quantities, and the treatment of these discarded tires has become a major issue for waste management. In general, this kind of waste tires are only reused as buffer fenders for ships, etc., or as earthworks laid on riverbanks and cliffs to prevent wind and flood damage, and the majority of them are incinerated. The reality is that the crushed pieces are sent to landfill. In this case, when incinerating waste tires, the so-called "direct combustion method" is adopted, in which the tires are directly placed in an incinerator, ignited, and air is forcibly supplied from the bottom of the hearth.

Problems to be Solved by the Invention Incidentally, tires are composed of polymers of petroleum-based hydrocarbon compounds, and the main component is typically rubber.
It is highly flammable as it is made up of 53% carbon black, 25% carbon black, 9% cords, 6% chemicals, and 5% oil, and when burned, it releases sulfur dioxide gas and bad odors. Therefore, if complete combustion is performed to suppress the occurrence of these pollution factors, the temperature reaches a high temperature of over 1,500°C, which has the drawback of damaging the furnace body in a normal incinerator. In order to contrast this, a special furnace structure has been proposed in which the furnace body exterior is configured as a double-walled water jacket and water is circulated to perform forced water cooling of the furnace body. However, the disadvantage is that the construction cost of the furnace increases significantly.

In addition, this type of waste tire incineration furnace is aimed at incineration by complete combustion of the tire, so there is little consideration given to the effective use of the heat generated during combustion, and until recently it has been used as a hot water/hot air generator. However, the utilization of this technology has only been realized to a limited extent.

Therefore, the inventor focused on the fact that waste tires are polymers of petroleum-based hydrocarbon compounds as described above, and can be made into a good combustible material by controlling combustion conditions. If carbonization is performed instead of combustion under a sufficient oxygen supply, the combustion components are volatilized to generate carbonization gas, and the resulting gas is used as a heat source by a burner, it is possible to process waste tires and use heat effectively. It was discovered that these can be achieved all at once. In this case, the carbonization gasification method for wood, coal, etc. is generally known, but the inside of the furnace is ideal for carbonization gasification by evenly and uniformly supplying air and water vapor, which are gasification promoters, into the fuel. It has been pointed out that maintaining the temperature at a certain temperature and taking all possible explosion-proof measures are technical difficulties, and these are important common issues that need to be solved when converting waste tires to carbonized gas.

Purpose of the Invention In this way, the present invention easily realizes the carbonization gasification of waste tires, which is generally considered to be difficult, and also allows the gasification operation to be carried out without requiring special technicians. The object of the present invention is to provide a simple carbonization gas generation device that can obtain the following effects.

Means for Solving the Problems In order to overcome the above-mentioned problems and suitably achieve the intended purpose, a simple carbonization gas generator according to the present invention includes an outer cylinder having ventilation holes in its outer periphery, and The inner cylinder is inserted concentrically into the outer cylinder, and the upper opening expands to close the upper part of the outer cylinder, forming a double pipe body. The double pipe body is arranged upright through a required space capable of storing objects, a first air supply pipe communicating with an external air blowing source is connected to the lower part of the outer pipe, and a gas burner tip is provided at the tip. A carbonization gas feed pipe led out to the outside of the carbonization furnace is connected to the lower part of the inner cylinder, and a second air supply pipe branched out from the first air supply pipe is connected concentrically to the carbonization gas feed pipe. It is characterized by being inserted into the tube so that the opening of the tube faces the vicinity of the gas burner chip, and further connecting the outlet of the hot air supply device to the furnace chamber of the carbonization furnace.

Embodiments Next, preferred embodiments of the carbonized gas simple generator according to the present invention will be described below with reference to the accompanying drawings. Note that the illustrated embodiment shows one embodiment as a preferred example, and it goes without saying that the present invention is not limited to the illustrated structure.

FIG. 1 is a schematic longitudinal cross-sectional view of an embodiment of a simple carbonized gas generator according to the present invention.
Reference numeral 10 indicates a carbonization furnace that forms the main body of the carbonization gas generator. This carbonization furnace 10 is preferably configured as a cylindrical furnace body whose inner wall is lined with a refractory cement to provide fire resistance and heat retention.
Inside this cylindrical furnace body, a large number of waste tires 12 as materials to be carbonized are stored in an overlapping manner. A suitable rostle (grate) 14 is stretched near the bottom of the furnace body 10, and this rostle 14
The inside of the furnace body is defined into a furnace chamber 16 and a combustion residue recovery chamber 18.

Next, as shown in the figure, an air supply cylinder 20 made of a metal with excellent fire resistance is vertically installed in the center of the furnace chamber 16. This air supply tube 20 is a waste tire 1.
The tire has a double hollow structure consisting of an outer cylinder 22 having a diameter large enough to allow a tire to be inserted through the center hole of the tire, and an inner cylinder 24 concentrically inserted into the outer cylinder 22. And the outer cylinder 22
is closed at its upper part by the upper opening of the inner cylinder 24 which expands in a flared shape, and is connected to a blower 28 via an air supply pipe 26 at its lower part. Further, an appropriate number of air holes 30 are bored in the outer cylinder 22 to supply air around the waste tire 12, but the number of air holes 30 is relatively small in the upper part of the cylinder. It is preferable to drill the holes so that they become denser toward the bottom.

Further, the inner cylinder 24 of the double cylinder body 20 has an open upper part and is used as a flow path for carbonization gas, which will be described later. The lower part of the inner cylinder 24 is connected to a carbonization gas feed pipe 32 having a gas burner chip 34 at its tip and led out to the outside of the carbonization furnace. in this case,
The air supply pipe 26 connected to the blower 28 is branched in the middle to lead out a second air supply pipe 36, which is concentrically inserted into the carbonized gas supply pipe 32 as shown in the figure. It is preferable that the opening end face the vicinity of the gas burner chip 34. Note that the first air supply pipe 26 and the second air supply pipe 36 are provided with dampers 38 and 40, respectively.
be installed so that the air supply amount can be adjusted. Furthermore, although the upper part of the inner cylinder 24 may be left completely open, it is covered with a cap 44 having an appropriate number of through holes 42 as shown in the figure, so that the inner cylinder 24 is sucked into the inner cylinder 24. It is preferable to uniformly diffuse the gas concentration of the carbonized gas.

Next, an opening 46 is bored below the furnace chamber 16, and this opening 46 is connected to a hot air supply device 50 via a pipe 48. This hot air supply machine 50
The furnace has a built-in electric heater with a large electric capacity and generates extremely high-temperature hot air, allowing the temperature inside the furnace to be adjusted to a desired high temperature in a short period of time. Note that this hot air supply device 50 and the above-mentioned blower 28 are both used for the purpose of blowing air, so if air is blown with the blowing capacity fully open, there will be enough air in the furnace chamber 16 of the carbonization furnace 10. Therefore, the carbonization (that is, steaming state) conditions would not be satisfied. Therefore, the amount of air supplied to the furnace chamber 16 by the hot air supply device 50 and the blower 28 is adjusted according to the internal volume of the furnace chamber 16 and the amount of waste tires to be carbonized to maintain a good carbonization condition. It is necessary to ensure that enough oxygen is delivered throughout the body. In this case, by selecting an appropriate model for the hot air supply device 50, it is possible to use one that provides a small amount of scenery and high static pressure. Can be controlled at high temperatures.

In FIG. 1, reference numeral 52 indicates a waste tire input port, and reference numerals 54 and 56 indicate an in-furnace viewing window and a combustion residue (generally ash) collection port, respectively.

Effects of the Embodiment Next, the actual use of the carbonization gas simple generator according to the present embodiment having the above-described configuration will be explained. When in use, an appropriate number of used waste tires 12 are stacked from the waste tire inlet 52 with the tire center hole inserted into the air supply cylinder 20, and the top layer of waste tire newspaper or the like is used as a pilot light. Perform top ignition. In addition, the air supply pipe 26
The damper 38 is fully opened and a large amount of air is supplied from the blower 28 to promote the combustion of the waste tires. When the temperature inside the furnace has risen sufficiently, the damper 38 is closed to release the amount of oxygen necessary for carbonization. supply When the temperature inside the furnace rises to a level necessary for carbonization, the waste tire 12 melts from its surface, and flammable gas begins to volatilize and stays in the furnace chamber 16.
This is carbonized gas.

Next, the operation of the hot air supply device 50 is started, high temperature hot air is sent into the furnace chamber 16 from the opening 46, and the temperature inside the furnace is appropriately controlled according to the carbonization conditions to perform stable carbonization operation. Can be done. The carbonized gas filling the furnace chamber 16 is maintained at a positive pressure inside the furnace chamber by the fumes from the air holes 30 formed in the air supply tube 20.
As shown, the gas is forced into the inner cylinder 24 and directed to the gas burner chip 34 via the carbonization gas feed pipe 32. At this time, as mentioned above, since the opening of the second air supply pipe 36 faces the vicinity of the gas burner chip 34, the carbonized gas is entrained by the air discharged from the second air supply pipe 36. Flow development occurs and is rapidly fed to the gas burner chip 34 with proper air mixing. In other words, the burner chip acts as an ejector that supplies carbonization gas by pressurizing air. If the gas burner chip 34 is ignited in this state, the carbonized gas will burn well, so this combustion energy can be effectively used as a heat source for boilers and other devices.

In addition, at the beginning of carbonization, dilute gas with insufficient flammability is generated, which is generally accompanied by an odor. Therefore, a band heater 58 made of an electric heating coil is wound around the connection part of the gas burner chip 34 of the carbonization gas feed pipe 32 to sufficiently heat the diluted gas that arrives first to promote deodorization and gas combustion. is desirable. Furthermore, in place of the band heater, high-temperature hot air from the hot air supply device 50 may be branched out and mixed into the diluted gas for deodorization.

Effects of the Invention As explained above, according to the simple carbonization gas generator of the present invention, a waste tire placed in a carbonization furnace is top ignited, and the waste tire is combusted with sufficient air supply. After starting the process and raising the temperature inside the furnace sufficiently, the air supply amount is reduced to facilitate the carbonization gasification reaction, and then high-temperature hot air is supplied into the furnace using a hot air supply machine to raise the temperature inside the furnace. It promotes carbonization and allows you to easily obtain carbonized gas. That is, after the inside of the furnace reaches the carbonization temperature, high-temperature hot air is blown into the furnace by the hot air supply device, and the carbonization gasification temperature can be freely set according to the type and property of the material to be carbonized. It is possible to obtain a large amount of flammable gas by carbonizing not only the waste tires shown in the figure, but also various other materials such as cloth, paper waste, plastic waste, wood chips, etc., which greatly contributes to resource and energy conservation. It is something.

In addition, temperature detection means such as thermocouples and thermistors are inserted into the furnace to monitor the temperature inside the furnace, and the hot air supply machine is operated within the range of maximum and minimum temperatures necessary for proper carbonization. I'll keep it.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view schematically showing a simple carbonization gas generation device according to the present invention. 10... Carbonization furnace, 12... Waste tires, 16...
Furnace chamber, 20...Double cylinder, 22...External cylinder, 2
4...inner cylinder, 26... (first) air supply pipe,
28... Blower, 30... Air hole, 32... Carbonized gas feed pipe, 34... Gas burner chip, 36
...Second air supply pipe, 42...Through hole, 44...
Shade, 46...opening, 48...pipe body, 50...hot air supply machine, 52...waste tire inlet, 58...band heater.

Claims (1)

[Scope of Claims] 1. An outer cylinder 22 having a ventilation hole 30 formed on its outer periphery, and an inner cylinder that is inserted concentrically through the outer cylinder 22 and whose upper opening expands to close the upper part of the outer cylinder 22. The double pipe body 20 is constructed from the carbonization furnace 10 with a refractory lining, and the double pipe body 20 is arranged upright inside the carbonization furnace 10 with a refractory lining, with a required space in which the material to be carbonized 12 can be stored. A first air supply pipe 26 communicating with the air source 28
is connected to the lower part of the outer cylinder 22, and a carbonization gas feed pipe 32 having a gas burner chip 34 at the tip and leading out of the carbonization furnace 10 is connected to the inner cylinder 22.
4 and branched out from the first air supply pipe 26.
An air supply pipe 36 is inserted concentrically into the carbonization gas supply pipe 32 so that the opening of the pipe body faces the vicinity of the gas burner chip 34, and a hot air supply machine is further inserted into the furnace chamber 16 of the carbonization furnace 10. 50
1. A simple carbonization gas generator characterized in that the air outlet of the carbonization gas is configured to be connected in communication with each other. 2. The carbonized gas simple generation according to claim 1, wherein the number of vent holes 30 on the outer periphery of the outer cylinder 22 is set to be relatively sparse in the upper part of the cylinder and become denser as it goes downward. Device. 3 Shade body 4 with many through holes drilled in the upper part of the inner cylinder 24
4. The simple carbonization gas generator according to claim 1, wherein the carbonization gas generator is coated with a carbon dioxide gas. 4. A simple carbonization gas generator according to claim 1, wherein a band heater 58 is wound around the carbonization gas feed pipe 32 near the connection portion with the gas burner chip 34.