JPH09310606A - Power generation system using waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation system using waste which reduces NOx contained in combustion gas that is an overheating source for steam generated by a refuse incinerating boiler with high reliability. SOLUTION: Mixture gas 17 to be supplied to a fuel reformer 56 is heated by a power generation system using waste. The power generation system has the indirective thermal exchanging fuel reformer 56 in which first combustion gas 55 heating the mixture gas 17 and the mixture gas 17 are not mixed, a burner 12 which burns hydrogen including gas 19 obtained by the fuel reformer 56 and refuse incineration discharge gas 60, that is refuse combustion gas 4 to generate second combustion gas 24, and an overheater 10 which overheats steam 5 generated from a burning system by the use of the second combustion gas 24 generated by the burner 12. It is thus possible to reduce NOx contained in combustion gas which is an overheating source of the steam 5 generated by a refuse incinerating boiler 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste power generation system that generates steam by combustion gas obtained by incinerating waste, and drives the steam turbine with this steam to generate electric power. The present invention relates to a system for superheating steam supplied to the.

[0002]

2. Description of the Related Art A waste power generation system having a steam turbine system is used to obtain steam for driving a steam turbine.
Combustion gas obtained by incinerating waste in an incinerator is introduced to a steam generator (hereinafter abbreviated as a boiler) to generate steam.

However, since the combustion gas obtained by incinerating the waste contains a corrosive substance that corrodes the boiler heat transfer tube, the combustion gas of about 900 ° C. produces a steam having a relatively low corrosion rate. That is, the operating temperature of the boiler is restricted so that steam of about 300 ° C. is generated. As a result, the power generation efficiency is as low as about 15%. Therefore, it has been desired to increase the temperature of steam supplied to the steam turbine to achieve higher efficiency.

[0004] Therefore, conventionally, the materials for the lecture "Development status and prospects of high-efficiency waste power generation" sponsored by Japan Society of Industrial Technology (January 1994)
(October 7th) and industrial pollution, Vol.29, No.8 (1993)
, III-13, “Recent Trends in Power Generation and Efficiency Improvement of Municipal Solid Waste”, etc., and the temperature of steam is increased by using the thermal energy of combustion gas that burns fuel such as natural gas. There are known things that aim at.

Of these, the former is equipped with a superheater with a burner directly attached to a system for guiding steam generated in a boiler to a steam turbine, and superheats the steam guided to the steam turbine to improve efficiency. . On the other hand, the latter is equipped with a gas turbine so that high temperature exhaust gas from the gas turbine and the steam introduced to the steam turbine are heat-exchanged with each other to achieve high efficiency.

[0006]

However, the above-mentioned method of directly attaching a burner to the superheater requires good combustion stability of the burner in the entire load range in which the waste power generation system operates. Completely premixed combustion cannot be used because the stable combustion region is narrow and the amount of nitrogen oxides (hereinafter abbreviated as NOx) is small. Therefore, it is unavoidable to adopt partial premixed combustion or diffusion combustion in which the amount of NOx generated is inevitably larger than in the case of complete premixed combustion.

Further, in the system in which a gas turbine is installed side by side,
Since the power generation efficiency of the gas turbine is also to be increased, the combustion temperature in the gas turbine combustor is set high. As a result, even if the complete premixed combustion in which the amount of NOx generated is small is adopted, the amount of NOx generated increases exponentially as the combustion temperature increases.

That is, the above-mentioned known ones are effective in increasing the efficiency of the waste power generation system,
Since the raw fuel such as natural gas used to obtain the combustion gas that is the source of steam superheat is burned with the same composition, NOx of at least several tens of ppm is generated at the O2 conversion concentration of 16%. Conceivable.

As described above, the conventional waste power generation system has a problem of reducing NOx. Although it may be possible to install a denitration device for reducing NOx, it is not so preferable because installation of the denitration device may increase the size of the equipment and increase the equipment cost.

In order to solve the above problems, an object of the present invention is to provide a waste power generation system for reducing NOx contained in combustion gas which is a superheat source of steam generated in a refuse incineration boiler. is there.

[0011]

In order to achieve the above object, the present invention provides an incineration system section for generating steam by a first combustion gas obtained by burning waste, and a superheat for superheating the steam. In a waste power generation system having a system part and a steam turbine system part for introducing the superheated steam to drive a turbine to generate electric power, the superheat system part is a fuel for reforming raw fuel into hydrogen-containing gas. A reformer, a combustor that combusts the hydrogen-containing gas and an oxidant to generate a second combustion gas, and a superheater that superheats the steam with the second combustion gas. .

Another feature of the present invention is that the first combustion gas discharged from a refuse incinerator that burns waste is introduced into a refuse incinerator boiler to generate steam, and the steam is superheated. In a waste power generation system having a superheat system section and a steam turbine system section that drives the turbine by introducing the superheated steam to drive the turbine, the superheat system section is configured to generate a portion of the raw fuel and the steam. A fuel reformer that indirectly heats the mixed gas mixture by a third combustion gas generated from a burner across a reaction tube to reform into a hydrogen-containing gas, and the reformed hydrogen-containing gas. There is a combustor that combusts the first combustion gas to generate a second combustion gas, and a superheater that superheats the steam with the second combustion gas.

According to the present invention, the fuel reformer uses natural gas as a raw fuel (for example, methane as a hydrocarbon fuel).
And a part of the steam generated in the incineration system part are mixed to indirectly heat the mixed gas generated by the third combustion gas generated from the burner across the reaction tube to generate hydrogen in the presence of the reforming catalyst. It is reformed to contained gas. The combustor combusts the reformed hydrogen-containing gas and the first combustion gas as an oxidant to generate a second combustion gas. The superheater superheats the steam with the second combustion gas.

As a result, about 30 generated in the incineration system section
The steam at about 0 ° C. can be superheated by the second combustion gas at about 600 to 850 ° C., and can be supplied to the steam turbine system unit as superheated steam at about 400 to 500 ° C.

On the other hand, the hydrogen-containing gas obtained in the fuel reformer contains several tens of percent of steam, and the reforming reaction in the fuel reformer is a reaction in which the number of moles increases, so the unit The calorific value per volume is low. The NOx generation amount increases as the combustion temperature rises. However, if the hydrogen-containing gas obtained in the fuel reformer is introduced into the combustor and combusted with the first combustion gas as the oxidant, from the above reason, The combustion temperature in the combustor is suppressed, and the amount of NOx generated is reduced.

Further, since the hydrogen-containing gas obtained by the fuel reformer is used as the fuel for the burner that heats the fuel reformer, the amount of NOx generated from the burner is suppressed and NOx is generated in the entire waste power generation system. It can be a low volume system.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A waste power generation system according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a waste power generation system according to an embodiment of the present invention. As shown in FIG. 1, the waste power generation system is roughly classified into an incineration system section that incinerates waste to generate steam by combustion gas obtained, and an overheating system that superheats the steam obtained in the incineration system section. Section, a steam turbine system section for introducing steam superheated in the superheat system section to drive a turbine to generate electricity, and an expansion turbine system section driven by combustion exhaust gas discharged from the superheat system section.

Of these, the incineration system section incinerates the waste bunker 7 into which the collected waste 1 is put, and the waste 1 supplied from the waste bunker 7 by the combustion air 2 supplied from the forced blower 8. Waste incinerator 3, waste incineration boiler for exchanging heat between waste combustion gas 4 which is the first combustion gas obtained by incineration of waste 1 and feed water 36 from a steam turbine system described later to generate steam 5. 6. A desuperheater 30 for removing soot dust, NOx, impurities and the like contained in the refuse incineration exhaust gas 37 discharged from the refuse incineration boiler 6 and releasing it to the atmosphere from the chimney 35, a bag filter 31, a gas cleaning tower 32, a gas reheater 33, and an induction blower 34.

The superheat system part is a system part that superheats the steam 5 generated in the refuse incineration boiler 6 by the combustion gas 24 which is the second combustion gas. Natural gas that is a raw fuel in the fuel reformer 56 (for example, methane that is a hydrocarbon fuel)
The mixed gas 17 obtained by mixing the raw fuel 52 and the air 5 is passed through the reaction tube 51 filled with the reforming catalyst 50.
The mixed gas 17 is heated using the combustion gas 55, which is the third combustion gas obtained by burning 3 and 3 in the burner 54, as a heating medium.

The mixed gas 17 is reformed into the hydrogen-containing gas 19 by the reaction represented by the following formula (Equation 1). In addition,
This reforming reaction is called a steam reforming reaction of methane, and is an endothermic reaction in which a mixed gas of methane and steam is changed into a hydrogen-rich gas.

CH ₄ + sH ₂ O → hH ₂ + c ₁ CO + c ₂ CO ₂ −ΔQ (Equation 1) where s, h, c ₁ and c ₂ are coefficients, and ΔQ is heat of reaction.

The hydrogen-containing gas 19 thus obtained
Is led to the combustor 12 as fuel for the combustor 12.

In the combustor 12, the hydrogen-containing gas 19 and the refuse incineration exhaust gas 60 are combusted to generate the combustion gas 24. The combustion gas 24 serves as a superheat source for the superheater 10 and superheats the steam 5 generated in the refuse incineration boiler 6. The waste incineration exhaust gas 60 is the outflow gas from the gas cleaning tower 32, which is supplied to the combustor 12 by the blower 61.

The steam turbine system section uses a steam turbine 2 driven by the superheated steam 11 superheated by the superheater 10.
5, a generator 26 driven by the steam turbine 25,
A condenser 27 that condenses and condenses the steam that has driven the steam turbine 25, a deaerator 28 that deaerates the condensate obtained by the condenser 27 by extraction of the steam turbine 25, and a deaerator 28. It is composed of a water supply pump 29 for supplying the condensate as water supply 36 to the refuse incineration boiler 6.

The waste power generation system of this embodiment is constructed as described above, and as described above, the steam 5 generated in the refuse incineration boiler 6 and guided to the steam turbine 25 is burned from the combustor 12. When the gas 24 is overheated, the fuel used in the combustor 12 is reformed into the hydrogen-containing gas 19 by the fuel reformer 56.

That is, when natural gas, which is a raw fuel, is burned with air in the same composition as it is, a large amount of heat generated by the hydrocarbon fuel forms a local high temperature portion in the combustion gas, and a large amount of NOx is produced. Will occur.

In order to suppress the amount of NOx generated,
It is effective to change the fuel composition of natural gas, which is a raw fuel, to a gas composition having a lower calorific value instead of being a hydrocarbon, but it is effective to use only a low calorific value gas for combustor 12.
It is necessary to take care not to impair the combustion stability because the combustion in the air becomes unstable.

Therefore, in the present embodiment, the above-mentioned fuel reformer 56 is provided so that the fuel of the combustor 12 contains hydrogen gas having the highest burning rate.

The fuel reformer 56 of this embodiment employs an indirect heat exchange type fuel reformer. The indirect heat exchange type fuel reformer is configured such that the combustion gas that is a heating medium and the reforming raw material that is a medium to be heated are separated via the reaction tube 51, and both are not mixed. That is, the high temperature combustion gas 55 generated from the burner 54 that burns the raw fuel 52 and the air 53 flows along the periphery of the reaction tube 51,
The reaction tube 51 is heated. The reforming catalyst 50 in the reaction tube 51 is supplied with a mixed gas 17 of hydrocarbon and steam as a reforming raw material, heated and heated from the outside of the reaction tube 51 to cause a reforming reaction and become a hydrogen-containing gas 19.

As described above, the combustion gas 55 after heating the reaction tube 51 and the hydrogen-containing gas 19 produced by the reforming
Is called an indirect heat exchange type fuel reformer, which is a type that goes out from the fuel reformer through separate paths.

As another type, there is a direct heat exchange type fuel reformer which directly mixes the combustion gas with the raw material gas to be reformed to cover the reaction heat of the reforming reaction. However, the indirect heat exchange type fuel reformer has a feature that it is possible to provide a fuel that can be easily burned in the combustor 12 because nitrogen in the combustion gas is not mixed in the reformed gas.

Next, the operation of the waste power generation system of this embodiment will be described.

The collected waste 1 is put into a waste bunker 7 and supplied to the refuse incinerator 3 by a supply means such as a crane (not shown). In addition, garbage incinerator 3
Combustion air 2 is supplied from the forced air blower 8 to burn the waste 1. By this combustion, a waste combustion gas 4 of about 900 ° C. is obtained from the waste incinerator 3, and the obtained waste combustion gas 4 is guided to a waste incineration boiler 6 provided on the downstream side.

Further, the refuse incineration ash 9 is discharged from the lower part of the refuse incinerator 3. In the refuse incineration boiler 6, heat is exchanged between the introduced waste combustion gas 4 of about 900 ° C. and the feed water 36 supplied from the feed water pump 29 to generate steam 5 of about 300 ° C.

The waste combustion gas 4 that has exchanged heat with the supply water and has a lowered temperature is used as a waste incineration exhaust gas 37, and the desuperheater 30 on the downstream side.
After passing through the bag filter 31 and the gas cleaning tower 32 to remove most of the dust, HCl, mercury, dioxin, etc. contained therein, the gas is introduced into the gas reheater 33. The gas reheater 33 is for raising the temperature of the refuse incineration exhaust gas 37 whose temperature has been lowered by washing with water in the gas washing tower 32 to a predetermined temperature, which is for preventing the generation of white smoke from the chimney 35. is there. The waste incineration exhaust gas 37, which has been heated to a predetermined temperature by the gas reheater 33, is pressure-fed by the induction blower 34 and is discharged from the chimney 35 into the atmosphere.

On the other hand, in the superheat system section, in order to obtain the combustion gas 24 which superheats the steam 5 of about 300 ° C. obtained in the incineration system section, the reaction in which the reforming catalyst 50 is filled in the fuel reformer 56. A mixed gas 17 which is a raw fuel in which a hydrocarbon-based fuel (for example, methane) and steam are mixed at a predetermined ratio is supplied into the pipe 51, and the mixed gas 17 is heated by the combustion gas 55 generated from the burner 54. The hydrogen-containing gas 19 is reformed.

The hydrogen-containing gas 19 thus obtained
Is led to the combustor 12 as fuel for the combustor 12.

In the combustor 12, the hydrogen-containing gas 19 supplied from the fuel reformer 56 and the refuse incineration exhaust gas 60 sucked from the outlet of the gas cleaning tower 32, that is, the refuse incineration which is the first combustion gas as an oxidant The gas 4 and the gas 4 are combusted by diffusion combustion to obtain a combustion gas 24 of about 600 to 850 ° C. The obtained combustion gas 24 is guided to the superheater 10 and superheats the steam 5 of about 300 ° C. generated in the refuse incineration boiler 6. Due to this overheating, about 400
Superheated steam 11 of about 550 ° C. is obtained.

At this time, the mass flow ratio of the waste incineration exhaust gas 60 to the hydrogen-containing gas 19 introduced into the combustor 12, that is, the waste incineration gas 4 as the first combustion gas, is 4 or more and 1 or more.
It is important that the temperature of the combustion gas 24 is set to 00 or lower and the temperature of the combustion gas 24 is set to a temperature of 700 ° C. or higher suitable for decomposing dioxin.

In the fuel reformer 56, the mass flow ratio of the mixed gas 17 to the raw fuel, that is, the combustion gas 55 which is a heating medium for heating the mixed gas 17 is set to 0.2 or more and 0.8 or less, Reforming catalyst 5 in reformer 56
It is important to maintain the temperature of 0 at 700 ° C. or higher, which is suitable for the reforming reaction.

The superheated steam 11 superheated by the superheater 10 drives the steam turbine 25. By this drive, the generator 26 directly connected to the steam turbine 25 is driven and electric power is obtained. The superheated steam 11 that has driven the steam turbine 25 is discharged from the steam turbine 25, and the condenser 2
It is condensed by 7 and condensed. The condensate obtained by the condenser 27 is supplied to the steam turbine 25 in the deaerator 28.
Is degassed by the bleeding of the water and is supplied with water through the water supply pump 29.
Is returned to the refuse incineration boiler 6.

As described above, according to the present embodiment, the mixed gas 17 obtained by mixing the natural gas, which is the raw fuel (for example, methane, which is a hydrocarbon fuel), and the water vapor is indirectly heated by the heat of the combustion gas 55 generated from the burner 54. Fuel reformer 56 that heats and reforms to obtain the hydrogen-containing gas 19 and combustion that combusts the hydrogen-containing gas 19 obtained in the fuel reformer 56 with the refuse incineration exhaust gas 60 to generate the combustion gas 24 Since the superheater system unit including the furnace 12 and the superheater 10 that superheats the steam 5 generated in the refuse incineration boiler 6 by using the combustion gas 24 generated in the combustor 12 as a superheat source is generated in the refuse incineration boiler 6. The steam 5 of about 300 ° C. can be supplied to the steam turbine 25 as the superheated steam 11 of about 400 to 550 ° C.

As a result, the amount of power generated by the steam turbine 25 is increased, and the power generation efficiency of the waste power generation system can be improved.

Further, since the hydrogen-containing gas 19 of low calorific value obtained in the fuel reformer 56 is introduced into the combustor 12 and burned with the refuse incineration exhaust gas 60, the combustion temperature in the combustor 12 is suppressed and NOx. Is reduced. That is, the hydrogen-containing gas 19 obtained in the fuel reformer 56 contains several tens% of water vapor, and the reforming reaction in the fuel reformer 13 is a reaction for increasing the number of moles. The calorific value per unit volume is reduced, and the rise in local temperature of the combustion gas is suppressed.

On the other hand, in the hydrogen-containing gas 19 obtained in the fuel reformer 56, hydrogen having a high burning rate is present at a rate of several% to several tens%, so that the calorific value per unit volume is low. Excellent combustion stability even with fuel. As a result, when the hydrogen-containing gas 19 obtained in the fuel reformer 56 and the refuse incineration exhaust gas 60 are combusted in the combustor 12, the combustion temperature is suppressed and the amount of NOx generated is reduced.

Furthermore, by reducing the NOx, the equipment such as the denitration device is reduced in size, and the running cost of ammonia water and the like required for denitration is reduced. Therefore, the cost of the waste power generation system can be reduced.

Further, according to the present embodiment, since the diffusion combustion having good combustion stability is used as the combustion method of the combustor 12, the combustor 12 is operated by following the load fluctuation of the steam amount in the superheater 10. can do.

Further, the waste incineration exhaust gas 60 is fed to the combustor 1
By subjecting it to combustion of No. 2, it is possible to combust and decompose dioxin, which is a harmful substance contained in the waste incineration exhaust gas 60, and it is effective in improving environmental conservation.

FIG. 2 is a block diagram showing a waste power generation system according to another embodiment of the present invention, which is a modification of the above-described FIG. Therefore, in the following description, only the differences from FIG. 1 will be described.

In the present embodiment, the entire amount of the refuse incineration exhaust gas 37 flowing out from the gas cleaning tower 32 is supplied to the combustor 12 by the blower 61, and the combustion gas 40 after heat exchange in the superheater 10 is introduced into the chimney 35. It is characterized in that it is configured to do.

According to this configuration, the entire amount of the refuse incineration exhaust gas 37 becomes the high temperature combustion gas 24 in the combustor 12 using the hydrogen-containing gas 19 obtained from the fuel reformer 56 as fuel, and then in the superheater 10. Steam 5 about 400-550 ℃
It is used as a heat source for producing superheated steam 11 of a certain degree. At this time, the hydrogen-containing gas 19 introduced into the combustor 12
The mass flow rate ratio of the waste incineration exhaust gas 37 to 4 to 10
It is important to set the temperature of the combustion gas 24 to 0 or lower and to set the temperature of the combustion gas 24 to 700 ° C. or higher suitable for the decomposition of dioxin.

Further, in the fuel reformer 56, the mixed gas 1 with respect to the combustion gas 55 which is a heating medium of the mixed gas 17
It is important to set the mass flow rate ratio of No. 7 to 0.2 or more and 0.8 or less and to keep the temperature of the reforming catalyst 50 in the fuel reformer 56 at 700 ° C. or more, which is a temperature suitable for the reforming reaction.

As described above, according to this embodiment, the waste incineration exhaust gas 3
Since the entire amount of No. 7 was burned in the combustor 12, dioxin, which is a harmful substance contained in the waste incineration exhaust gas 37, can be burned and decomposed, and there is an effect of further improving environmental conservation. Further, combustion exhaust gas 40 discharged from the superheater 10
Is at a temperature at which white smoke is not generated, so it can be directly guided to the chimney 35 and discharged into the atmosphere.
There is an economic effect that 3 is unnecessary.

When the temperature of the combustion exhaust gas 40 discharged from the superheater 10 is higher than the white smoke prevention temperature by several tens of degrees Celsius or more, the heat of the combustion exhaust gas 40 is retained by the raw fuel supplied to the fuel reformer 56. It is used to improve the thermal efficiency of the entire system by utilizing it for preheating 52, air 53 or mixed gas 17.

FIG. 3 is a block diagram showing a waste power generation system according to another embodiment of the present invention, which is a modification of the above-described FIG. Therefore, in the following description, only the differences from FIG. 2 will be described.

In this embodiment, a part of the hydrogen-containing gas 19 obtained from the fuel reformer 56 is passed through the valve 62 to the burner 54.
It is characterized in that a bypass pipe 64 that is introduced as the fuel 63 is provided.

According to this configuration, the burner 54, which was burning the raw fuel 52 at the time of starting the system, has a low calorific value obtained from the fuel reformer 56 after the fuel reformer 56 is in the operating state. It becomes possible to generate combustion gas by using the hydrogen-containing gas 19 as the fuel 63 of the burner 54.

As described above, according to the present embodiment, the low calorific value hydrogen-containing gas 19 obtained from the fuel reformer 56 is burned by the burner 54, so that the combustion gas 5 discharged from the burner 54 is discharged.
There is an effect that NOx contained in 5 can be reduced. As a result, the entire waste power generation system can be suppressed to a lower NOx level.

FIG. 4 is a system diagram showing a waste power generation system according to another embodiment of the present invention, which is a modification of the above-described FIG. Therefore, in the following description, only the differences from FIG. 3 will be described.

In this embodiment, the water vapor 65, which is one of the compositions of the mixed gas 17 supplied to the fuel reformer 56, is passed through the valve 6
It is characterized in that it is supplied from the refuse incineration boiler 6 via 6 and that a mixer 67 is provided to mix the raw fuel 68 and the steam 65 with the mixer 67 to obtain the mixed gas 17.

According to this structure, the raw fuel 68 is mixed with the mixer 6 by the steam 65 of about 300 ° C. from the refuse incineration boiler 6.
After being mixed and heated in 7, the fuel is sent to the reforming catalyst 50 filled in the reaction tube 51 in the fuel reformer 56,
The combustion gas 55 generated from the burner 54 supplies the heat necessary for the reforming reaction.

As described above, according to this embodiment, the waste incineration boiler 6 is used as the steam 65 necessary for the reformed gas of the fuel reformer 56.
Since a part of the steam 5 is used, the fuel reformer 56 does not require a dedicated steam generator.

[0064]

EFFECTS OF THE INVENTION According to the present invention, NO contained in the combustion gas which is a superheat source of steam generated in the refuse incineration boiler.
Since x can be reduced, the efficiency and reliability of the waste power generation system can be improved, and the environmental conservation can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a waste power generation system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a waste power generation system which is a modification of FIG. 1 in another embodiment of the present invention.

FIG. 3 is a configuration diagram showing a waste power generation system which is a modified example of FIG. 2 in another embodiment of the present invention.

FIG. 4 is a configuration diagram showing a waste power generation system which is a modification of FIG. 3 in another embodiment of the present invention.

[Explanation of symbols]

1 ... Waste, 2 ... Combustion air, 3 ... Garbage incinerator, 4 ... Garbage combustion gas, 5 ... Steam, 6 ... Garbage incineration boiler, 7 ... Waste bunker, 8 ... Push blower, 9 ... Garbage incineration ash, 10 ... Superheater, 11 ... Superheated steam, 12 ... Combustor, 17 ... Mixed gas, 18 ...
Air, 19 ... Hydrogen-containing gas, 24 ... Combustion gas, 25 ... Steam turbine, 26 ... Generator, 27 ... Condenser, 28 ... Deaerator, 29 ... Water pump, 30 ... Desuperheater, 31 ... Bag filter , 32 ... Gas scrubber, 33 ... Gas reheater, 34 ... Induction blower, 35 ... Chimney, 36 ...
Water supply, 37 ... refuse incineration exhaust gas, 40 ... combustion exhaust gas, 50 ... reforming catalyst, 51 ... reaction tube, 52 ... raw fuel, 53 ... air, 54 ... burner, 55 ... combustion gas, 56 ... fuel reformer, 60 … Waste incineration exhaust gas, 61… Blower, 62… Valve, 63… Fuel, 64… Bypass pipe,
65 ... steam, 66 ... valve, 67 ... mixer, 68 ... raw fuel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuko Amishiro 72-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Electric Power & Electric Development Division (72) Akira Yamada Omika-cho, Hitachi-shi, Ibaraki 7-1-1, Hitachi Co., Ltd. Hitachi Research Laboratory (72) Inventor Megumi Suno 3-1-1, Saiwaicho, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Works (72) Inventor Kenji Tokunaga Ibaraki 1-1, Saiwaicho, Hitachi, Ltd. Hitachi Works, Hitachi Works

Claims (10)

[Claims] 1. An incineration system section for producing steam by first combustion gas obtained by burning waste, an overheating system section for superheating the steam, and a turbine for introducing the superheated steam. In a waste power generation system having a steam turbine system unit that drives and generates electricity, the superheat system unit burns a fuel reformer that reforms a raw fuel into a hydrogen-containing gas, and the hydrogen-containing gas and an oxidant. And a superheater that superheats the steam with the second combustion gas, the waste power generation system. 2. The fuel reformer according to claim 1, wherein the heating medium for heating the raw fuel and the raw fuel are fluid when the raw fuel is heated and reformed into the hydrogen-containing gas. A waste power generation system characterized by an indirect heat exchange method that does not mix mechanically. 3. The waste power generation system according to claim 1, wherein the first combustion gas is used as the oxidant. 4. The mass flow rate ratio of the first combustion gas as the oxidant to the hydrogen-containing gas introduced into the combustor according to claim 1, wherein the mass flow ratio is 4 or more and 100 or more.
A waste power generation system characterized by the following. 5. The mass flow rate ratio of the raw fuel to the heating medium according to any one of claims 1 to 3, wherein the mass flow rate ratio of the raw fuel is 0.2 or more and 0.1.
A waste power generation system characterized in that the number is 8 or less. 6. The waste power generation system according to claim 2 or 5, wherein the heating medium is a third combustion gas generated from a burner of the fuel reformer. 7. The waste according to claim 1, wherein the entire amount of the first combustion gas obtained by burning the waste is burned in the combustor as the oxidant. Power generation system. 8. The outlet of the fuel reformer according to claim 1, wherein a conduit for supplying a part of the hydrogen-containing gas reformed by the fuel reformer as fuel for the burner is provided. A waste power generation system characterized by being installed in parallel with the fuel reformer from the side to the inlet side. 9. The fuel reformer according to claim 1, wherein a part of the steam is mixed with the raw fuel as reforming steam of the fuel reformer and is supplied to the fuel reformer. The waste power generation system, wherein the waste power generation system is provided on the side where the raw fuel flows. 10. An incineration system section for introducing a first combustion gas discharged from a refuse incinerator for burning waste to a refuse incineration boiler to generate steam, an overheating system section for superheating the steam, and the superheated system. In a waste power generation system having a steam turbine system unit that introduces the steam and drives a turbine to generate electricity, the superheat system unit uses a mixed gas obtained by mixing the raw fuel and a part of the steam as a reaction tube. A fuel reformer that indirectly heats and reforms to a hydrogen-containing gas by a third combustion gas generated from a burner across a distance, the reformed hydrogen-containing gas and the first combustion gas. A waste power generation system comprising: a combustor that burns to generate a second combustion gas; and a superheater that superheats the steam with the second combustion gas.