JPH09137927A - Power generation amount control equipment in waste treatment system having power generation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate the amount of supply of waste and thereby to make the amount of power generation constant in the equipment which generates electric power by utilizing exhaust heat of a waste treatment system. SOLUTION: This power generation equipment so constructed that waste D is charged in a thermal decomposition reactor 2 by a charging device 1 and subjected to thermal decomposition and thereby dry distillation gas G1 and a thermal decomposition residue (z) constituted mainly of nonvolatile components are produced, that the dry distillation gas G1 and the thermal decomposition residue are separated from each other and the latter is supplied to a separating device 13 to be separated into combustive components (n) and non-combustive components (fn) and that the combustive components (n) and the dry distillation gas G1 are supplied to a combustor 11 and steam S obtained by supplying combustion gas from the combustor 11 to an exhaust heat boiler 17 is supplied to a steam turbine 21 driving a generator 20, is provided. A detector 22 detecting the amount of power generation is provided for the generator 20 and the aforesaid charging device 1 is controlled by a signal from the detector 22 so as to control the amount of the waste D charged in the thermal decomposition reactor 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation amount control device in a waste treatment device having a power generation device, and more specifically to thermal decomposition of waste to generate a thermal decomposition product, which is combusted in a combustor. The present invention relates to a power generation amount control device in a waste treatment device having a power generation device configured to supply the obtained combustion gas to an exhaust heat boiler and use the steam generated in the exhaust heat boiler to generate electric power.

[0002]

2. Description of the Related Art Waste is put into a thermal decomposition reactor by an input device as one of the treatment devices for general waste such as municipal solid waste and industrial waste containing combustible substances such as waste plastic, and low acid under atmospheric pressure is used. Pyrolysis is performed by heating in an atmosphere to produce a dry distillation gas and a pyrolysis residue mainly composed of non-volatile components,
Further, after the thermal decomposition residue is cooled, it is led to a separating device, and in this separating device, it is separated into non-combustible components and burning components such as rubble of metal, pottery, gravel, concrete and the like.

Then, this combustion component is pulverized, and the pulverized combustion component and the above-mentioned carbonization gas are introduced into a melting furnace which is a combustor and burned in this melting furnace, and the generated combustion ash is made into molten slag, A waste treatment device that discharges this molten slag to cool and solidify it, and also supplies combustion gas from the melting furnace to an exhaust heat boiler to generate steam, which drives a steam turbine to drive a generator. Has already been proposed (for example, JP-A-1-49816).

[0004]

By the way, in a waste treatment apparatus in which such an exhaust heat boiler and a generator are provided side by side to recover heat of exhaust gas, the nature of the waste, specifically, the waste The temperature of the combustion gas generated from the melting furnace changes depending on the water content and the type and content of combustible substances, and therefore the temperature and amount of steam generated in the exhaust heat boiler also change.

As a result, the amount of power generated by the generator changes. Due to this variation in the amount of power generation, it is not preferable to operate the equipment on the load side that uses this power. Especially when this generator is installed in a power plant for the purpose of selling power, this variation in the amount of power generation is a serious problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, in which waste is put into a thermal decomposition reactor by an input device, and the inside of the thermal decomposition reactor is charged. In the above, the waste is heated to be thermally decomposed to generate a dry distillation gas and a thermal decomposition residue mainly composed of a non-volatile component, the dry distillation gas and the thermal decomposition residue are separated, and the thermal decomposition residue is separated. Is supplied to a combustor to separate it into a combustion component and a non-combustion component, the combustion component and the carbonized gas are supplied to a combustor, and the combustion gas from the combustor is supplied to an exhaust heat boiler, which is obtained by the exhaust heat boiler. In a waste treatment device having a power generator configured to supply the generated steam to a steam turbine that drives a generator, the generator is provided with a detector for detecting the amount of power generation, and the injection is performed by a signal from the detector. Waste to the pyrolysis reactor by controlling the equipment There is provided a power generation control device of the waste processing apparatus having a power generator so as to control the Iriryou.

When the feeding device is a screw feeder, the amount of waste fed to the waste pyrolysis reactor is adjusted by controlling the rotation speed of the screw. According to the power generation amount control device in the waste treatment device having such a power generation device, the power generation amount that changes depending on the property of the waste is
By adjusting the input amount of waste, it can be kept almost constant, and the load on the load side equipment can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a power generation amount control device in a waste treatment device having a generator according to the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a charging device for charging the waste D into the thermal decomposition reactor 2.
Is composed of a screw feeder 5 in which a screw 4 attached to a screw shaft is arranged in a casing 3, and a drive device 6 such as a motor for rotating the screw 4. The driving device 6 is controlled by a signal V ₁ described later.

A horizontal rotary drum is usually used as the thermal decomposition reactor 2, which is sealed by a sealing mechanism (not shown) and the inside of which is attracted by an induction blower 8 provided at the final stage of the passage of the combustion gas under atmospheric pressure. That is, it is operating in a negative pressure state. Then, the thermal decomposition reactor 2 is heated by the heated air a supplied from the heat exchanger 9 through the line L _1.
The waste D supplied is heated to 00 ° C. to 600 ° C., usually to about 450 ° C., and the supplied waste D is pyrolyzed to produce a dry distillation gas G ₁ and mainly a non-volatile pyrolysis residue z.

The dry distillation gas G ₁ and the thermal decomposition residue z
Are separated by a discharge device 10 provided in the pyrolysis reactor 2 and the dry distillation gas G ₁ is supplied to a burner 12 of a melting furnace 11 constituting a combustor via a line L ₂ . On the other hand, the thermal decomposition residue z is supplied to the separation device 13 having a cooling device. The separating device 13 has a classifying means composed of a plurality of stages of sieves of, for example, 5 mm, 2 mm, and 1 mm, and is mainly a coarse non-combustible component fn (metal, rubble, etc.) present in the thermal decomposition residue z. Are separated and removed.

The thermal decomposition residue composed of relatively fine particles separated by the separator 13 is mainly a combustion component n.
, And the by a pulverizer 14 to the fuel constituent n, preferably 'is a, the combustion component n' combustion components n which consists of the following fine 1mm melting furnace 11 through the storage device is not directly or illustrated from the line L ₃ Is supplied to the burner 12. Then, the dry distillation gas G ₁ supplied from the line L ₂ and the combustion component n ′ supplied from the line L ₃ : the line L ₄ by the blower 15
The combustion air k supplied from the
Combustion is performed at a high temperature of 1300 ° C., and combustion ash generated at this time becomes molten slag s and falls into the water tank 16 to be cooled and solidified. The cooled and solidified slag s is used as a building material such as a paving material.

The combustion gas G ₂ in the melting furnace 11 passes through the line L ₅ and the heat exchanger 9, the exhaust heat boiler 17 and the dust collector 18a,
18b are successively heat recovery and dust removal via, they are attracted by the attractant blower 8 relatively a low temperature clean combustion gas G _3, and is discharged from the chimney 19 into the atmosphere. Dust collector
The line L ₆ connected to the outlet side of 18b is the combustion gas G ₃
Is a line for supplying a part of this to the separating device 13, specifically, the cooling device incorporated in the separating device 13.

The steam S generated by the exhaust heat boiler 17 heated by the combustion gas G ₂ of the melting furnace 11 is supplied to the steam turbine 21 which drives the generator 20, and the electric power obtained by the generator 20 is not shown. It is supplied to equipment on the load side.
A detector 22 detects the amount of power generated by the generator 20, and the signal V _{2 from the} detector 22 is input to the arithmetic unit 23. The arithmetic unit 23 is composed of devices such as a storage device 24 and a comparator 25, and a predetermined power generation amount required in advance is input to the storage device 24, and its signal V ₃ and the signal V ₂ from the detector 22 are input. When the amount of power generation is input to the comparator 25 and the power generation amount is out of the allowable range, a control signal V ₁ is generated, and the control device V ₁ controls the driving device 6 of the screw feeder 5 to perform thermal decomposition. It is configured to adjust the input amount of the waste D to the reactor 2.

It is possible to control the amount of power generation more effectively by using a means for detecting the property of the waste D which is previously charged into the thermal decomposition reactor 2.

[0015]

As is apparent from the above description, according to the power generation amount control device in the waste treatment device having the power generation device according to the present invention, the amount of waste to be put into the thermal decomposition reactor can be adjusted. This makes it possible to keep the amount of power generated by the generator almost constant. As a result, the device control on the load side using the electric power from this generator becomes simple. Especially when this generator is installed in a power plant for the purpose of selling power, the effect is great.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a power generation amount control device in a waste treatment device having a power generation device according to the present invention.

[Explanation of symbols]

 1 Input Device 2 Pyrolysis Reactor 3 Casing 4 Screw 5 Screw Feeder 6 Drive Device 8 Induction Blower 9 Heat Exchanger 10 Discharge Device 11 Melting Furnace 12 Burner 13 Separator 14 Crusher 15 Blower 16 Water Tank 17 Exhaust Heat Boiler 18a, 18b Dust collector 19 Chimney 20 Generator 21 Steam turbine 22 Detector 23 Computing device 24 Storage device 25 Comparator

Claims (2)

[Claims] 1. A waste is charged into a pyrolysis reactor by an input device, and the waste is heated and pyrolyzed to produce a dry distillation gas and a pyrolysis residue mainly composed of a non-volatile component,
The dry distillation gas and the pyrolysis residue are separated, and the pyrolysis residue is supplied to a separation device to separate into a combustion component and a non-combustion component,
A combustion component and the carbonized gas are supplied to a combustor, the combustion gas from the combustor is supplied to an exhaust heat boiler, and the steam obtained by the exhaust heat boiler is supplied to a steam turbine that drives a generator. In the waste treatment device having the power generator described above, a detector for detecting the amount of power generation in the generator is provided, and the input device is controlled by a signal from the detector to input the amount of waste into the thermal decomposition reactor. A power generation amount control device for a waste treatment device having a power generation device. 2. The feeding device comprises a screw feeder having a screw arranged in a casing and a driving device for driving the screw, and the driving device is controlled by a signal from a detector to rotate the screw. A power generation amount control device in a waste treatment device having the power generation device according to claim 1, wherein the power generation amount control device is adjusted.