JP2006162198A - Method for effectively using energy of waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat efficiency and power generation efficiency, while minimizing initial cost and running cost, by reducing the number of apparatuses and devices. <P>SOLUTION: A carbonization facility 1 of waste W for forming thermally decomposed gas G and a thermally decomposed residue D by processing the waste W by thermal decomposition under a reducing atmosphere, separating the generated thermally decomposed gas G and thermally decomposed residue D and selecting and recovering carbide C from the separated thermally decomposed residue D, is juxtaposed in a thermal power generation facility 2 using coal as fuel. A part of the thermally decomposed gas G generated by the carbonization facility 1 is burnt in a combustion furnace 9 of the carbonization facility 1, and is used as a heat source for thermally decomposing the waste W. The carbide C selected and recovered from residual thermally decomposed gas G and the thermally decomposed residue D, is supplied to the thermal power generation facility 2, and is used as fuel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for effectively using energy held by waste such as municipal waste, and the carbonization facility for waste that is thermally decomposed into pyrolysis gas and pyrolysis residue is coal-fired by an electric power company. A part of or all of the pyrolysis gas generated in the carbonization facility and the charcoal (carbon residue) selected and recovered from the pyrolysis residue are supplied to the thermal power generation facility and used as fuel. Further, the present invention relates to a waste energy effective utilization method that effectively utilizes the energy of pyrolysis gas and carbide.

  Generally, in a waste treatment facility that treats waste such as municipal waste, the waste is burned or melted, and the heat generated at that time is recovered as steam by a boiler or the like to generate power and supply heat. I am doing so. In this case, there are many facilities where the power generation efficiency is less than half that of the power generation facilities of the power company. For example, in the case of a single incineration facility, the power generation efficiency is as low as 10% to 20%, and it is difficult to say that the energy possessed by the waste is effectively utilized.

  Conventionally, as a method of effectively using the energy of waste, the waste is pyrolyzed into pyrolysis gas and pyrolysis residue, and the carbide (carbon residue) contained in the pyrolysis gas and pyrolysis residue. ) Is known as a fuel. As a waste treatment facility using this method, a pyrolysis gasification melting plant is known (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

  That is, the pyrolysis gasification and melting plant is not shown, but the waste is dry-distilled in a reducing atmosphere by a pretreatment facility for storing, crushing and transporting the waste and an indirect heating type pyrolysis drum. Pyrolysis equipment that decomposes pyrolysis into pyrolysis gas and pyrolysis residue, pyrolysis residue sorting equipment that cools pyrolysis residue and sorts it into carbide (carbon residue), iron, aluminum, etc., pyrolysis gas and High-temperature combustion melting equipment that burns and melts carbides, etc. in a combustion melting furnace, boiler power generation equipment that generates power by supplying boiler steam generated by heat recovery from exhaust gas to the steam turbine generator, cooling of exhaust gas and in exhaust gas It consists of an exhaust gas treatment facility that removes dust, etc., and can recover valuable materials such as iron and aluminum from waste in a form that can be easily reused, as well as low NOx and low dioxy Etc. attained a reduction, a treatment plant waste with excellent advantages.

  However, the pyrolysis gasification and melting plant has poor power generation efficiency compared to the power generation facilities of electric power companies, and since there are melting furnaces and dust collectors installed, the number of equipment and devices is inevitably large. As a result, the initial cost and running cost are increased, and a large installation space is required when installing the equipment.

In addition, as another method of effectively using the energy possessed by waste, after sorting and collecting carbides (carbon residues) from the thermal decomposition residues generated by the thermal decomposition of the waste, the carbides are recovered at the power plant, etc. There is known a method in which the fuel is supplied to another facility and burned as fuel (see, for example, Patent Document 4 and Patent Document 5).
This method has excellent advantages such as energy and cost can be reduced as compared with the case of producing solid fuel from waste, and valuable metals and glass contained in waste can be recovered. have.

However, in the above method, a carbonization facility equipped with a pyrolysis furnace for pyrolyzing waste and a sorting device for sorting carbides from pyrolysis residues generated by pyrolysis is used as a power plant of an electric power company. Is constructed in a different location, and solidified carbides and pulverized carbides are transported to power plants by trucks and trains and used as fuel, so it is difficult to reduce initial costs and running costs. There was a problem.
In addition, since only carbide is supplied to the power plant and used as fuel, it is difficult to significantly improve thermal efficiency and power generation efficiency, and an exhaust gas treatment device for treating pyrolysis gas in a carbonization facility is available. There was also a problem that it was necessary.
Japanese Patent No. 3317843 JP 2002-263626 A JP 2003-71242 A JP 2000-283404 A JP 2000-283430 A

  The present invention has been made in view of such problems, and its purpose is to reduce the number of equipment and devices, to keep initial costs and running costs low, and to improve the thermal efficiency and power generation efficiency. The object is to provide a method for effectively using waste energy that can be improved.

  In order to achieve the above-mentioned object, the invention of claim 1 of the present invention is that a waste is pyrolyzed in a reducing atmosphere to form pyrolysis gas and pyrolysis residue, and the generated pyrolysis gas and pyrolysis residue A waste carbonization facility that separates and collects carbides from the separated pyrolysis residue is attached to a thermal power generation facility using coal as fuel, and part of the pyrolysis gas generated in the carbonization facility Is used as a heat source for pyrolysis of waste by burning it in the combustion furnace of the carbonization facility, and the remaining pyrolysis gas and carbides selected and recovered from the pyrolysis residue are supplied to the thermal power generation facility as fuel. There is a feature in using it.

  According to the second aspect of the present invention, the waste is pyrolyzed in a reducing atmosphere to form a pyrolysis gas and a pyrolysis residue, the generated pyrolysis gas and the pyrolysis residue are separated, and the separated heat is separated. A waste carbonization facility that separates and collects carbides from cracking residues is attached to a thermal power generation facility that uses coal as fuel, and external fuel is burned in a hot-air generator in the carbonization facility to heat waste for thermal decomposition. As well as all of the pyrolysis gas produced in the carbonization facility and the carbide selected and recovered from the pyrolysis residue are supplied to the thermal power generation facility and used as fuel.

  According to the third aspect of the present invention, the waste is thermally decomposed in a reducing atmosphere to form a pyrolysis gas and a pyrolysis residue, the generated pyrolysis gas and the pyrolysis residue are separated, and the separated heat is separated. A waste carbonization facility that separates and collects carbides from the decomposition residue is attached to a thermal power generation facility using coal as fuel, and a part of the combustion exhaust gas generated in the thermal power generation facility is led to the carbonization facility to generate waste. In addition to being used as a heat source for pyrolysis, all of the pyrolysis gas generated in the carbonization facility and the carbide selected and recovered from the pyrolysis residue were supplied to the thermal power generation facility and used as fuel. There is a feature.

  The invention of claim 4 of the present invention is characterized in that the combustion exhaust gas generated in the carbonization facility is supplied to the thermal power generation facility and the exhaust gas treatment is performed by the exhaust gas treatment facility of the thermal power generation facility.

In the present invention, a waste carbonization facility that is thermally decomposed into a pyrolysis gas and a thermal decomposition residue in a reducing atmosphere is attached to a coal-fired thermal power generation facility of an electric power company, and is generated in the carbonization facility. Supply part or all of the pyrolysis gas and carbide (carbon residue) selected and recovered from the pyrolysis residue to the thermal power generation facility as fuel, and supply the combustion exhaust gas generated at the carbonization facility to the thermal power generation facility However, because the exhaust gas treatment equipment of the thermal power generation facility treats the combustion exhaust gas, the exhaust gas treatment equipment and chimney of the carbonization facility become unnecessary, and the number of equipment and devices in the carbonization facility can be greatly reduced. . As a result, according to the present invention, it is possible to simplify the carbonization facility, reduce the installation space of the carbonization facility, reduce initial costs (equipment costs and construction costs) and running costs, and reduce labor related to maintenance. .
In the present invention, since the carbonization facility is attached to the thermal power generation facility and the pyrolysis gas and carbide generated in the carbonization facility are supplied as fuel to the thermal power generation facility, the carbide is heated by thermal transportation or by a conveyor. It can be transported easily and easily to the power generation facility, and the initial cost and running cost are lower than when the carbonization facility is constructed at a location separate from the power plant and the carbide is transported to the power plant by truck or train. become.
Furthermore, since the present invention uses the pyrolysis gas and carbide as fuel in a thermal power generation facility with high power generation efficiency, it is possible to effectively recover the energy possessed by the waste, and the thermal efficiency and power generation efficiency Can be greatly improved.
In addition, since the present invention supplies carbides and pyrolysis gas to thermal power generation facilities and uses them as fuel, the electric power company can also reduce fuel costs by obtaining heat sources from waste. At the same time, new energy equivalent power (RPS) can be secured.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic system diagram of an effective energy utilization system for waste W that implements the method of the present invention. The system thermally decomposes the waste W in a reducing atmosphere to decompose pyrolysis gas G and pyrolysis. The waste pyrolysis gas G and the pyrolysis residue D are separated into the residue D, and the carbonization facility 1 of the waste W that selects and collects the carbide C from the separated pyrolysis residue D is replaced with coal from the electric power company. It has a structure attached to a thermal power generation facility 2 as a fuel, and a part of the pyrolysis gas G generated in the carbonization facility 1 is burned in the combustion furnace 9 of the carbonization facility 1 to produce high-temperature air A. The high-temperature air A is used as a heat source for the thermal decomposition of the waste W, and the remaining pyrolysis gas G and carbide C selected from the pyrolysis residue D are supplied to the thermal power generation facility 2 and used as fuel. Energy of pyrolysis gas G and carbide C In which was to promote the effective use of ghee.

  That is, the carbonization facility 1 includes a pretreatment facility 3 for storing, crushing, and transporting the waste W, and pyrolysis pyrolysis of the waste W into a pyrolysis gas G and a pyrolysis residue D under a reducing atmosphere. And a pyrolysis residue sorting facility 5 that cools the pyrolysis residue D and sorts it into carbide C (carbon residue), iron, aluminum, and the like. Are recovered in a form that can be easily reused, and the generated pyrolysis gas G and carbide C are supplied as fuel to the business boiler 18 of the thermal power generation facility 2.

  Specifically, the pretreatment facility 3 includes a waste pit (not shown) that stores waste W such as municipal waste, and a crusher 6 that crushes the waste W in order to increase thermal efficiency in the thermal decomposition facility 4. And a transporting device (not shown) for transporting the waste W, the waste W is crushed to about 150 mm or less by the crusher 6, and the crushed waste W is pyrolyzed by the transporting device (not shown). This is supplied to the pyrolysis drum 7 of the equipment 4.

  Further, the pyrolysis equipment 4 includes an indirect heating type pyrolysis drum 7 which thermally decomposes the waste W by indirect heating with high-temperature air A in a reducing atmosphere into pyrolysis gas G and pyrolysis residue D, A separator 8 that separates the pyrolysis gas G and pyrolysis residue D discharged from the cracking drum 7 by gravity, and a part of the pyrolysis gas G discharged from the separator 8 and flowing in the pyrolysis gas conduit 13 are branched. A combustion furnace 9 (provided with a starter burner) that is pulled out and burned by a pipe 14, and an air heater 10 that generates high-temperature air A for thermal decomposition heating of the waste W by the combustion exhaust gas G ′ from the combustion furnace 9. And a high-temperature air pipe 11 that connects the pyrolysis drum 7 and the air heater 10 in a loop, a high-temperature air circulation blower 12 interposed in the high-temperature air pipe 11, and the like. Waste W thrown into the inside is hot The pyrolysis gas G and pyrolysis residue D are pyrolyzed by indirect heating with gas A, and the pyrolysis gas G and pyrolysis residue D discharged from the pyrolysis drum 7 are separated by a separator 8. Part of the pyrolysis gas G discharged from 8 and flowing in the pyrolysis gas conduit 13 is guided to the combustion furnace 9 by the branch pipe 14 and burned, and the high-temperature combustion exhaust gas G ′ generated in the combustion furnace 9 is discharged. A high-temperature air A is produced by supplying it to the air heater 10, and the high-temperature air A is formed in a loop-shaped circulation path comprising a high-temperature air pipe 11, a pyrolysis drum 7, a high-temperature air circulation fan 12, an air heater 10, and the like. In circulation.

  Furthermore, the pyrolysis residue sorting equipment 5 includes a cooling conveyor (not shown) for cooling the pyrolysis residue D discharged from the separator 8 and a vibrating screen (not shown) for sorting and collecting the carbide C from the pyrolysis residue D. ), A magnetic separator (not shown) that sorts and collects iron from the pyrolysis residue D, and an aluminum sorter (not shown) that sorts and recovers aluminum from the pyrolysis residue D. The thermal decomposition residue D discharged from the container 8 is configured to selectively collect carbide C, valuable materials such as iron and aluminum, and unsuitable melting materials such as sand and concrete pieces.

The carbonization facility 1 uses the pyrolysis gas conduit 13 for the pyrolysis gas G discharged from the separator 8 (the pyrolysis gas G other than the pyrolysis gas G guided to the combustion furnace 9). In addition to supplying fuel to the boiler 18 for fuel, the carbide C sorted and recovered by the pyrolysis residue sorting equipment 5 is pneumatically transported by the blower 15 and the carbide piping 16 to be supplied to the business boiler 18 of the thermal power generation facility 2 as fuel. It is configured as follows.
Further, the carbonization facility 1 uses the combustion exhaust gas conduit 17 to treat the combustion exhaust gas G ′ through the combustion exhaust gas conduit 17 so that the combustion exhaust gas G ′ that has passed through the air heater 10 is treated with the exhaust gas treatment facility 21 of the thermal power generation facility 2. 2 to the upstream side of the exhaust gas treatment facility 21.

On the other hand, the thermal power generation facility 2 includes a business boiler 18 (a pulverized coal fired boiler, a stoker fired boiler, a fluidized bed boiler) that burns coal, pyrolysis gas G and carbide C as fuel, and a steam turbine driven by steam. 19, a generator 20 linked to the steam turbine 19, an exhaust gas treatment facility 21 including a denitration device, a dust collector and a desulfurization device, a chimney 22 connected to the exhaust gas treatment facility 21, and the like. A generator in which coal, pyrolysis gas G and carbide C are burned in a business boiler 18 to generate high-temperature and high-pressure steam S, a steam turbine 19 is driven by the generated steam S, and the steam turbine 19 is linked to the generator. Power generation is performed at 20. Further, the combustion exhaust gas G ″ discharged from the business boiler 18 is treated with exhaust gas by the exhaust gas treatment facility 21 and is discharged into the atmosphere from the chimney 22 as clean gas.
This thermal power generation facility 2 may be an existing one or a new one.

In the above-described embodiment, the carbide C is transported to the thermal power generation facility 2 by pneumatic transportation. However, in other embodiments, the carbide C is heated by a conveyor (not shown). It may be transferred to the power generation facility 2.
In the above embodiment, the high-temperature air A is produced by the air heater 10 from the combustion exhaust gas G ′ from the combustion furnace 9, and this is heated in the pyrolysis drum 7 for pyrolysis heating of the waste W. However, in other embodiments, the air heater 10 is omitted, and the combustion exhaust gas G ′ from the combustion furnace 9 is passed through a high-temperature bag filter (not shown) to remove dust. The combustion exhaust gas G ′ may be directly supplied to the pyrolysis drum 7 as a heating gas and circulated in a loop-shaped circulation path including the pyrolysis drum 7 and the combustion furnace 9. In this case, the surplus combustion exhaust gas G ′ is supplied to the thermal power generation facility 2, and the exhaust gas treatment is performed by the exhaust gas treatment facility 21 of the thermal power generation facility 2.

  Next, the case where the waste W is processed using the above-described waste energy effective utilization system will be described.

  When the operation of the carbonization facility 1 is started, fossil fuel is burned by a burner (not shown) provided in the combustion furnace 9 to generate a heated gas, and the heated gas is used for pyrolysis heating of the waste W by the air heater 10. High-temperature air A is produced, and the high-temperature air A is supplied to the pyrolysis drum 7. Then, the waste W that has been crushed by the crusher 6 and supplied to the pyrolysis drum 7 is indirectly heated in the pyrolysis drum 7 by hot air A in a reducing atmosphere and pyrolyzed pyrolyzing. The pyrolysis gas G and the pyrolysis residue D are obtained. These pyrolysis gas G and pyrolysis residue D are discharged from the pyrolysis drum 7 and separated into pyrolysis gas G and pyrolysis residue D by the separator 8.

The pyrolysis gas G is mainly composed of moisture, CO, CO ₂ , H ₂ and hydrocarbons, and additionally contains carbon residue and the like. The pyrolysis residue D is a mixture of a carbon residue, a valuable material such as iron or aluminum, and an unsuitable melting material such as sand or a concrete piece.

When the pyrolysis gas G and the pyrolysis residue D are discharged from the pyrolysis drum 7, a part of the pyrolysis gas G flowing in the pyrolysis gas conduit 13 is led to the combustion furnace 9 by the branch pipe 14. While burning, gradually reduce the amount of fossil fuel burned in the burner.
The remaining pyrolysis gas G is supplied to the business boiler 18 of the thermal power generation facility 2 through the pyrolysis gas conduit 13 and burned there as fuel.

When the amount of the pyrolysis gas G discharged from the pyrolysis drum 7 reaches the set amount, the operation of the burner is stopped and only the pyrolysis gas G guided from the branch pipe 14 to the combustion furnace 9 is removed. The combustion exhaust gas G ′ is generated by burning the gas, and the combustion exhaust gas G ′ is supplied to the air heater 10 to produce high-temperature air A. Circulation and circulation are performed in a loop-shaped circulation path composed of the circulation fan 12 and the air heater 10. As a result, the waste W in the pyrolysis drum 7 is subsequently pyrolyzed by indirect heating with high-temperature air A to become pyrolysis gas G and pyrolysis residue D.
At this time, the combustion exhaust gas G ′ supplied from the combustion furnace 9 to the air heater 10 is supplied to the thermal power generation facility 2 through the combustion exhaust gas conduit 17. And released from the chimney 22 into the atmosphere.
Moreover, since only the pyrolysis gas G is burned to produce the high-temperature air A, the amount of fossil fuel used can be reduced.

On the other hand, the pyrolysis residue D separated by the separator 8 is supplied to the pyrolysis residue sorting equipment 5, where carbide C and valuable materials such as iron and aluminum are separated by a vibrating screen, a magnetic separator and an aluminum sorter. Then, they are sorted and collected into unsuitable materials such as sand and concrete pieces.
Further, the carbide C sorted and collected by the thermal decomposition residue sorting equipment 5 is conveyed to the business boiler 18 of the thermal power generation facility 2 by air transportation or conveyor by the blower 15 and the carbide pipe 16 and burned as fuel here. .

Thus, in the above-mentioned waste energy effective utilization system, the carbonization facility 1 is attached to the thermal power generation facility 2, and the pyrolysis gas G and carbide C generated in the carbonization facility 1 are supplied to the thermal power generation facility 2. Since the fuel is supplied as fuel, the energy of the waste W can be effectively recovered, and the thermal efficiency and power generation efficiency can be greatly improved. For example, in this system, the power generation efficiency can be about 40% as compared with a conventional single waste incineration facility (equipped with power generation equipment) having a power generation efficiency of 10% to 20%.
In this system, since pyrolysis gas G, carbide C and combustion exhaust gas G ′ are supplied to the thermal power generation facility 2, the exhaust gas treatment equipment and chimney of the carbonization facility 1 become unnecessary. The number of equipment and devices in the carbonization facility 1 can be greatly reduced. As a result, the carbonization facility 1 can be simplified, the installation space of the carbonization facility 1 can be reduced, the initial cost (equipment costs and construction costs) and running costs can be reduced, the labor involved in maintenance can be reduced, and the chemicals used for exhaust gas treatment can be reduced. You can plan each one.
Further, in this system, since the carbonization facility 1 is provided in the thermal power generation facility 2, the carbide C can be easily and easily transported to the thermal power generation facility 2 by pneumatic transportation or a conveyor. The initial cost and running cost are lower than the case where is constructed in a place different from the power plant.
In addition, in this system, since the carbide C and the pyrolysis gas G are supplied to the thermal power generation facility 2 and used as fuel, the power company also obtains the fuel cost by obtaining the heat source from the waste W. It is possible to reduce power consumption and secure new energy equivalent power (RPS).

  FIG. 2 shows a schematic system diagram of a waste energy effective utilization system for carrying out another method of the present invention. The system thermally decomposes the waste W in a reducing atmosphere to produce pyrolysis gas G and heat. The pyrolysis gas G and the pyrolysis residue D are separated into the cracking residue D, and the carbonization facility 1 for the waste W that sorts and collects the carbide C from the separated pyrolysis residue D is used as the coal of the electric power company. The thermal power generation facility 2 is used as a fuel, and an external fuel such as oil or natural gas is burned in the hot air generator 25 of the carbonization facility 1 and the combustion exhaust gas G ′ is pyrolyzed into the waste W. And used as a fuel by supplying all of the pyrolysis gas G generated in the carbonization facility 1 and carbide C selected and recovered from the pyrolysis residue D to the thermal power generation facility 2 Energy of cracked gas G and carbide C It is obtained so as to make effective use of over.

That is, the system burns external fuel such as oil or natural gas in the hot air generating furnace 25 to generate combustion exhaust gas G ′, and heats the combustion exhaust gas G ′ as a heating gas for thermal decomposition heating of the waste W. It was circulated and circulated in a loop-shaped circulation path composed of the decomposition drum 7, the combustion exhaust gas circulation blower 23, the combustion furnace 9, the combustion exhaust gas piping 24, the high-temperature bag filter (not shown), etc. The pyrolysis gas G and the carbide C selected and recovered from the pyrolysis residue D are supplied to the boiler 18 for use in the thermal power generation facility 2 and used as fuel. The exhaust gas G ′ is supplied to the thermal power generation facility 2 through the combustion exhaust gas conduit 17, and the exhaust gas treatment is performed by the exhaust gas treatment facility 21 of the thermal power generation facility 2.
The system is configured in the same manner as the system shown in FIG. 1 except for the above-described system. The same parts and members as those in the system shown in FIG. Is omitted.
This system can achieve the same effects as the system shown in FIG. 1 and can further simplify the pyrolysis equipment 4 of the carbonization facility 1.

  FIG. 3 shows a schematic system diagram of a waste energy effective utilization system that implements still another method of the present invention. The system thermally decomposes the waste W in a reducing atmosphere to produce a pyrolysis gas G and The pyrolysis residue G is separated from the generated pyrolysis gas G and the pyrolysis residue D, and the carbonization facility 1 for the waste W that separates and collects the carbide C from the separated pyrolysis residue D A thermal power generation facility 2 that uses coal as fuel is provided, and a part of the combustion exhaust gas G ″ generated in the thermal power generation facility 2 is led to the carbonization facility 1 as a heat source for thermal decomposition of the waste W. In addition to using the pyrolysis gas G generated in the carbonization facility 1 and the carbide C selected and recovered from the pyrolysis residue D, the pyrolysis gas G is supplied to the thermal power generation facility 2 and used as fuel. And energy of carbide C In which it was to promote the use.

That is, in the system, a part of the combustion exhaust gas G ″ discharged from the business boiler 18 of the thermal power generation facility 2 or a part of the combustion exhaust gas G ″ in the business boiler 18 is converted into the waste W by the combustion exhaust gas pipe 26. Is supplied to the thermal decomposition drum 7 as a heating gas for thermal decomposition heating, and the combustion exhaust gas G ″ discharged from the thermal decomposition drum 7 is supplied to the thermal power generation facility 2 through the combustion exhaust gas pipe 26 to be exhausted by the exhaust gas treatment facility 21. The entire pyrolysis gas G generated in the carbonization facility 1 and the carbide C selected and recovered from the pyrolysis residue D are supplied to the business boiler 18 of the thermal power generation facility 2 and used as fuel. At this time, the temperature of the combustion exhaust gas G ″ supplied from the thermal power generation facility 2 to the pyrolysis drum 7 is a temperature (530 ° C.) at which the waste W can be pyrolyzed. .
The system is configured in the same manner as the system shown in FIG. 1 except for the above-described system. The same parts and members as those in the system shown in FIG. Is omitted.
This system can achieve the same effects as the system shown in FIG. However, since the combustion exhaust gas G ″ of the thermal power generation facility 2 is a clean gas with less acid gas components than the combustion exhaust gas G ′ of the pyrolysis gas G, it is suitable for diversion.

It is a schematic system diagram of the energy efficient utilization system of the waste which implements the method of the present invention. It is a schematic system diagram of the energy efficient utilization system of the waste which implements the other method of this invention. It is a schematic system diagram of the waste energy effective utilization system which implements another method of the present invention.

Explanation of symbols

  1 is a carbonization facility, 2 is a thermal power generation facility, 9 is a combustion furnace, 25 is a hot air generator, A is high-temperature air, C is carbide, D is a pyrolysis residue, G is a pyrolysis gas, G ′ and G ″ are combustion Exhaust gas, W is waste.

Claims (4)

  The waste is pyrolyzed under a reducing atmosphere into pyrolysis gas and pyrolysis residue, and the generated pyrolysis gas and pyrolysis residue are separated, and carbide is selected and recovered from the separated pyrolysis residue. A waste carbonization facility is installed in a coal-fired thermal power generation facility, and a part of the pyrolysis gas generated in the carbonization facility is combusted in a combustion furnace of the carbonization facility to heat waste for thermal decomposition. In addition, the waste pyrolysis gas and the carbide selected and collected from the pyrolysis residue are supplied to a thermal power generation facility and used as fuel, and the waste energy is effectively used.   The waste is pyrolyzed under a reducing atmosphere into pyrolysis gas and pyrolysis residue, and the generated pyrolysis gas and pyrolysis residue are separated, and carbide is selected and recovered from the separated pyrolysis residue. A carbonization facility for waste is attached to a thermal power generation facility using coal as fuel, and external fuel is burned in a hot-air generator of the carbonization facility to be used as a heat source for thermal decomposition of waste, and also generated at the carbonization facility. A method for effectively using waste energy, wherein all of the pyrolyzed gas and carbide selected and recovered from the pyrolysis residue are supplied to a thermal power generation facility and used as fuel.   The waste is pyrolyzed under a reducing atmosphere into pyrolysis gas and pyrolysis residue, and the generated pyrolysis gas and pyrolysis residue are separated, and carbide is selected and recovered from the separated pyrolysis residue. A waste carbonization facility is attached to a coal-fired thermal power generation facility, and a part of the combustion exhaust gas generated in the thermal power generation facility is led to the carbonization facility to be used as a heat source for thermal decomposition of waste, Efficient use of waste energy, characterized in that all of the pyrolysis gas generated in the carbonization facility and the carbide selected and recovered from the pyrolysis residue are supplied to the thermal power generation facility and used as fuel. Method.   The waste according to claim 1, 2 or 3, wherein the combustion exhaust gas generated in the carbonization facility is supplied to the thermal power generation facility and the exhaust gas treatment is performed by the exhaust gas treatment facility of the thermal power generation facility. How to use energy efficiently.

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