JP2004093018A - Incineration system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incineration system without using fossil fuel system auxiliary fuel and quickly and accurately controlling the inside of an incineration furnace, allowing low cost operation. <P>SOLUTION: The incineration system comprises an incineration furnace, a dryer for forming a dried cake by drying a dehydrating cake, a dried cake supply part for supplying the dried cake formed by the dryer into the incineration furnace, a heat exchanger for transmitting the exhaust gas from the incineration furnace to the dryer, an exhaust gas processing tower for removing an acid portion in the exhaust gas, and a heat pump for transmitting the heat of the exhaust water from the exhaust gas processing tower. The incineration system further comprises a dehydrated cake supply part for supplying a dehydrated cake into the incineration furnace and a thermometer for gauging the temperature inside the incineration furnace. The ratio of supply amount of dried cakes and dehydrated cakes may be varied according to the temperature inside the incineration furnace. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an incineration system for incinerating sewage sludge and the like.
[0002]
[Prior art]
FIG. 6 is a schematic diagram of a prior art incineration system as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-303736. As shown in FIG. 6, the prior art incineration system 100 includes a fluidized incinerator 200, an air preheater 400, and an exhaust gas treatment tower 500. The dewatered cake formed by dewatering the sewage sludge is dried by the dryer 300 and is put into the fluidized incinerator 200 as a dry cake, or is put into the fluidized incinerator 200 as a dehydrated cake together with the dried cake. You. Next, the dried cake is incinerated in fluidized incinerator 200 and enters exhaust gas treatment tower 500 via air preheater 400 and heat exchanger 350. In the exhaust gas treatment tower 500, the exhaust gas is discharged after the acid component in the exhaust gas is absorbed by water. Water containing an acidic component is neutralized by an alkaline substance and then drained separately. The heat exchanger 350 is connected to the dryer 300 via a heat medium, and heats the dryer 300 using the heat of the exhaust gas.
[0003]
As shown in FIG. 6, the combustion air in the fluidized incinerator 200 is usually supplied to the fluidized incinerator 200 after being preheated by an air preheater 400 utilizing exhaust gas. For example, when the temperature in the fluidized incinerator 200 is significantly increased, the combustion air heated by the air preheater 400 is cooled by the air cooler 450, thereby adjusting the temperature in the fluidized incinerator 200. I have.
[0004]
[Problems to be solved by the invention]
However, when the dewatered cake is dried only by the heat exchanger 350 using the exhaust gas, the drying is insufficient, and it is difficult to form a dried cake having a moisture content capable of self-combustion. In such a case, even if only the dried cake is put into the fluidized incinerator 200, it cannot be incinerated. Therefore, it is necessary to separately inject the fossil fuel-based auxiliary fuel, for example, heavy oil into the incinerator 200 to incinerate the dried cake. There is. Since fossil fuel-based supplementary fuels are relatively expensive, the operating costs of prior art incineration systems 100 are increased. In the specification of the present application, a state in which incineration is possible without using auxiliary fuel is referred to as "self-combustible".
[0005]
Further, when the combustion air heated by the air preheater 400 is supplied into the fluidized incinerator 200 after being cooled by the air cooler 450, a time lag occurs because the temperature in the fluidized incinerator 200 is adjusted. It is extremely difficult to control the temperature in the fluidized incinerator 200 quickly and accurately, and as a result, it becomes difficult to control the self-combustion of the incineration system 100. In addition, it can be said that cooling the air for combustion by the air cooler 450 after heating the air for combustion by the air preheater 400 itself is thermally wasteful. Furthermore, when the entire dewatered cake is heated to a water content that can be burned without auxiliary fuel, the viscosity of the formed dried cake increases, so that the dried cake may be clogged when transported and charged. is there.
[0006]
The present invention has been made in view of such circumstances, is capable of self-combustion without using a fossil fuel-based auxiliary fuel, can quickly and accurately control the temperature in an incinerator, and can be operated at low cost. The purpose is to provide a simple incineration system.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided an incinerator, a dryer for forming a dried cake by drying a dehydrated cake, and a drying cake formed by the dryer. A drying cake supply unit for supplying the inside of the incinerator, a heat exchanger for transferring heat of exhaust gas from the incinerator to the dryer, an exhaust gas treatment tower for removing acid components in the exhaust gas, and the exhaust gas treatment There is provided an incineration system comprising: a heat pump that transfers heat of wastewater from a tower to the dryer; and the dryer is heated by the heat exchanger and the heat pump.
That is, according to the first aspect of the present invention, it is possible to form a self-combustible dry cake by the heat of the exhaust gas from the incinerator and the wastewater from the exhaust gas treatment tower, and at low cost without using a fossil fuel-based auxiliary fuel. An operable incineration system can be provided.
[0008]
According to the invention of claim 2, an incinerator, a dryer for forming a dried cake by drying the dewatered cake, and a dried cake for supplying the dried cake formed by the dryer to the incinerator A supply unit, a heat exchanger that transfers heat of the exhaust gas from the incinerator to the dryer, a boiler that generates steam by the heat of the exhaust gas from the incinerator, a turbine that is rotated by the steam, and a water-cooled condenser. A heat pump that transfers heat of wastewater from the water-cooled condenser to the dryer, wherein the dryer is heated by the heat exchanger and the heat pump.
That is, according to the second aspect of the present invention, a dry cake capable of self-combustion can be formed by the heat of the exhaust gas from the incinerator and the waste water from the water-cooled condenser, so that the operation can be performed at low cost without using the fossil fuel-based auxiliary fuel. Provide a possible incineration system.
[0009]
According to the invention as set forth in claim 3, the incinerator, the digestion unit for digesting the sewage sludge, the dewatering unit for dewatering the digested sewage sludge to form a dewatered cake, and drying the dewatered cake by drying the dewatered cake A dryer for forming a cake, a dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator, and a first heat exchange for transferring heat of exhaust gas from the incinerator to the dryer. And a turbine that rotates by the energy of high-temperature and high-pressure air obtained by burning methane gas generated in the digestion section, and a second heat exchanger that transfers heat of steam from the gas turbine to the dryer. And an incineration system wherein the dryer is heated by the first and second heat exchangers.
That is, according to the third aspect of the invention, a dry cake capable of self-combustion can be formed by the heat of the exhaust gas from the incinerator and the steam from the gas turbine, so that the operation can be performed at low cost without using the fossil fuel-based auxiliary fuel. Provide a possible incineration system.
[0010]
According to the invention described in claim 4, the first incinerator, a dryer for forming a dried cake by drying the dewatered cake, and supplying the dried cake formed by the dryer to the incinerator. A drying cake supply unit, a first heat exchanger for transmitting heat of exhaust gas from the incinerator to the dryer, a second incinerator, and drying the heat of exhaust gas from the second incinerator. And a second heat exchanger communicating to the dryer, wherein the first and second heat exchangers heat the dryer.
That is, according to the invention of claim 4, since a dry cake capable of self-combustion can be formed by the heat of the exhaust gas from the first incinerator and the exhaust gas from the second incinerator, the fossil fuel-based auxiliary fuel is used. It is possible to provide an incineration system that can be operated at low cost without using any incinerator.
[0011]
According to the invention as set forth in claim 5, an incinerator, a dryer for forming a dried cake by drying the dewatered cake, and a dried cake for supplying the dried cake formed by the dryer to the incinerator A supply unit, a first heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer, and a biomass fuel supply unit that supplies biomass fuel into the incinerator; An incineration system is provided for incineration with a biomass fuel.
That is, according to the fifth aspect of the present invention, a dried cake or the like can be incinerated with a relatively low-cost biomass fuel, so that self-combustion can be performed without using a fossil fuel-based auxiliary fuel. Therefore, an incineration system that can be operated at low cost can be provided. The biomass fuel used in the invention of claim 5 is meat-and-bone meal or the like. Also, by supplying biomass fuel to a conventional auxiliary fuel supply, it is preferred to use the auxiliary fuel supply as a biomass fuel supply, thereby providing the additional fuel needed to install the biomass fuel supply. Costs can be eliminated. Of course, solid fuel (RDF) may be used instead of biomass fuel. Further, a dried cake having a moisture content capable of self-combustion, which is carried in from the outside of the incineration system, can also be used as biomass fuel.
[0012]
According to the invention as set forth in claim 6, further comprising a dewatering cake supply unit for supplying a dewatering cake into the incinerator, and a thermometer for measuring the temperature in the incinerator, The supply ratio of the dried cake and the dewatered cake into the incinerator was changed according to the temperature.
That is, according to the invention of claim 6, the temperature in the incinerator is adjusted to the optimum temperature by simply changing the supply ratio between the dried cake and the dewatered cake in accordance with the temperature in the incinerator obtained by the thermometer. Can be easily maintained. In this case, since the calorific value of the incineration itself is directly adjusted, the temperature in the incinerator can be quickly and accurately controlled, and the self-combustion action of the incineration system itself can be controlled. As a result, it is possible to provide an incineration system that can self-burn without using a fossil fuel-based auxiliary fuel and that can be operated at low cost. The invention according to claim 6 maintains the temperature in the incinerator by changing the amount of the dried cake and the dewatered cake to be incinerated, so that the air cooler used in the conventional incineration system is eliminated. can do. Furthermore, according to the invention of claims 1 to 5, since the dry cake has a high viscosity and can have a water content lower than the water content range in which clogging is likely to occur at the time of transportation and charging, the conventional dry cake incineration system can be used. The clogging of the cake can be reduced as compared with the case.
[0013]
According to the invention of claim 7, an incinerator, a dewatering cake supply unit that supplies a dewatered cake into the incinerator, and a dryer that dries a part of the dewatered cake to form a dried cake, A drying cake supply unit configured to supply the dried cake into the incinerator; and a heat exchanger configured to transmit heat of exhaust gas from the incinerator to the dryer, wherein the drying is performed according to a temperature in the incinerator. An incineration system is provided in which the ratio of the amount of cake and the dewatered cake supplied to the incinerator is changed.
That is, according to the invention of claim 7, when a dry cake sufficiently dried to be self-combustible can be supplied, the dry cake and the dewatered cake are separated according to the temperature in the incinerator obtained by the thermometer. By simply changing the feed ratio, the temperature in the incinerator can be easily maintained at the optimum temperature. In this case, since the calorific value of the incineration itself is directly adjusted, the temperature in the incinerator can be quickly and accurately controlled, and the self-combustion action of the incineration system itself can be controlled. As a result, it is possible to provide an incineration system that can self-burn without using a fossil fuel-based auxiliary fuel and that can be operated at low cost. The invention according to claim 7 maintains the temperature in the incinerator by changing the amount of the dry cake and the dewatered cake to be incinerated, so that the air cooler used in the incineration system of the prior art is eliminated. can do. Furthermore, according to the invention of claims 1 to 5, since the dry cake has a high viscosity and can have a water content lower than the water content range in which clogging is likely to occur at the time of transportation and charging, the conventional dry cake incineration system can be used. The clogging of the cake can be reduced as compared with the case. In addition, a biomass fuel, for example, meat-and-bone meal may be supplied to the incinerator together with the dried cake to further make it self-combustible.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same members are denoted by the same reference numerals. To facilitate understanding, the scales of these drawings are appropriately changed.
FIG. 1 is a schematic diagram of an incineration system according to a first embodiment of the present invention. As shown in FIG. 1, in the incineration system 10 of the present invention, a dewatered cake formed by pre-treating sewage sludge or the like, for example, by dewatering, is dried by a dryer 30, thereby forming a dried cake. ing. The dried cake is supplied into the incinerator 20 of the incineration system 10 by a dried cake supply unit (not shown), for example, a conveyor, a hopper, or the like. The incinerator 20 in the present invention is, for example, a fluidized incinerator. The exhaust gas generated in the incinerator 20 is discharged through the air preheater 40 and the exhaust gas treatment tower 50 (the flow of the exhaust gas is indicated by a double line). ing. As shown in FIG. 1, the combustion air supplied by the blower 41 is supplied into the incinerator 20 after being heated by the air preheater 40 using exhaust gas. Further, a heat exchanger 35 utilizing the heat of the exhaust gas is provided. The heat of the exhaust gas is transmitted to the dryer 30 by the heat exchanger 35, and the dehydrated cake is dried to form a dried cake.
[0015]
The water containing acidic components is supplied to the heat pump 61 after being neutralized by the alkaline substance in the exhaust gas treatment tower 50. As shown in FIG. 1, the heat pump 61 is connected to the dryer 30 via a heat medium. In the heat pump 61, water at about 50 ° C. from the exhaust gas treatment tower 50 is cooled to about 30 ° C. and discharged, and a heat medium at about 80 ° C. is heated to about 200 ° C. and enters the dryer 30. That is, in the present embodiment, both the heat of the exhaust gas and the heat of the wastewater from the exhaust gas treatment tower 50 are transmitted to the dryer 30 by the heat exchanger 35 and the heat pump 61. As a result, in the present embodiment, it is possible to form a dry cake that is sufficiently dried to self-burn. Accordingly, in the present embodiment, a relatively expensive fossil fuel-based auxiliary fuel, for example, heavy oil is not required, so that an incineration system that can be operated at low cost can be provided.
[0016]
FIG. 2 is a schematic diagram showing a part of an incineration system according to a second embodiment of the present invention. In FIG. 2, the incinerator 20, the exhaust gas treatment tower 50, and the like are omitted for easy understanding.
The turbine 71 shown in FIG. 2 is driven by steam generated in a boiler (not shown) using heat of exhaust gas generated from the incinerator 20 of the incineration system 10. Gas discharged from the turbine is cooled in a water-cooled condenser 72. As shown in FIG. 2, a heat pump 62 is connected to the water-cooled condenser 72 and the dryer 30 via a heat medium. Thus, in the heat pump 62, the water of about 50 ° C. generated in the water-cooled condenser 72 is cooled to about 30 ° C. and discharged, and the heat medium of about 80 ° C. is heated to about 200 ° C. enter in. That is, in the present embodiment, both the heat of the exhaust gas and the heat of the wastewater from the water-cooled condenser 72 are transmitted to the dryer 30 by the heat exchanger 35 and the heat pump 62. As a result, in the present embodiment, it is possible to form a dry cake that is sufficiently dried to self-burn. Therefore, similarly to the above-described embodiment, a relatively expensive fossil fuel-based auxiliary fuel, for example, heavy oil is not required in the present embodiment, so that an incineration system that can be operated at low cost can be provided.
[0017]
FIG. 3 is a schematic diagram showing a part of an incineration system according to a third embodiment of the present invention. 3, the incinerator 20, the exhaust gas treatment tower 50, and the like are omitted for easy understanding.
The dewatered cake is formed by dewatering sewage sludge or the like. In the present embodiment, the dewatered cake has a digestion unit (not shown) for digesting sewage sludge before dehydration, and the digestion unit is, for example, a digestion tank. Organic substances in the sewage sludge are anaerobically decomposed in the digestion section to generate digestive gas. Since the main component of the digestion gas is methane gas, in this embodiment, high-temperature and high-pressure air is generated by burning methane gas. The turbine 81 shown in FIG. 3 is rotated by the high-temperature and high-pressure air via a recuperator 82. As shown in FIG. 3, the high-temperature and high-pressure air obtained by burning the methane gas is heated from about 200 ° C. to 500 ° C. by the recuperator 82 and enters the turbine 81. At the same time, the exhaust gas from the turbine 81 is lowered from about 600 ° C. to about 270 ° C. in the recuperator 82 and enters the heat exchanger 63. As shown in FIG. 3, the heat exchanger 63 is connected to the dryer 30 via a heat medium. Therefore, in the heat exchanger 63, the steam at about 270 ° C. from the recuperator 82 is cooled to about 80 ° C. and discharged, and the heat medium at about 80 ° C. is heated to about 200 ° C. and enters the dryer 30. I do. That is, in the present embodiment, both the heat of the exhaust gas and the heat of the steam from the turbine are transmitted to the dryer 30 by the heat exchanger 35 and the heat exchanger 63. As a result, in the present embodiment, it is possible to form a dry cake that is sufficiently dried to self-burn. Therefore, similarly to the above-described embodiment, a relatively expensive fossil fuel-based auxiliary fuel, for example, heavy oil is not required in the present embodiment, so that an incineration system that can be operated at low cost can be provided.
[0018]
FIG. 4 is a schematic diagram of an incineration system according to a fourth embodiment of the present invention. This embodiment is applied to a case where an incinerator (not shown) separate from the incinerator 20 of the incineration system 10, for example, an incinerator in a garbage incineration plant is installed near the incineration system 10. As shown in FIG. 4, for example, steam generated by using exhaust gas from an incinerator in a garbage incineration plant is applied to a heat medium that connects the heat exchanger 35 and the dryer 30. That is, in the present embodiment, the heat of the exhaust gas from the incinerator 20 and the heat of the exhaust gas from another incinerator (not shown) are transmitted to the dryer 30. As a result, in the present embodiment, it is possible to form a dry cake that is sufficiently dried to self-burn. Therefore, similarly to the above-described embodiment, a relatively expensive fossil fuel-based auxiliary fuel, for example, heavy oil is not required in the present embodiment, so that an incineration system that can be operated at low cost can be provided.
[0019]
In the fifth embodiment of the present invention (not shown), the dried cake is incinerated by supplying the biomass fuel into the incinerator 20. The biomass fuel is, for example, meat-and-bone meal, but other biomass fuels can be used. A dried cake having a moisture content capable of self-combustion carried in from the outside of the incineration system 10 can also be used as the biomass fuel. In the present embodiment, by using a relatively low-cost biomass fuel, a relatively expensive fossil fuel-based auxiliary fuel, for example, heavy oil is not required, so that an incineration system that can be operated at a low cost can be provided. Further, in the related art, an auxiliary fuel supply unit (not shown) for supplying auxiliary fuel to the incinerator 200, for example, a pipe is present, but the biomass fuel is supplied into the incinerator 20 using these auxiliary fuel supply units. Preferably it is supplied. In this case, the additional costs required to install a biomass fuel supply can be eliminated. Of course, solid fuel (RDF) may be used instead of biomass fuel.
[0020]
FIG. 5 is a schematic diagram of an incineration system according to an additional embodiment of the present invention. As shown in FIG. 5, in the present embodiment, a dewatered cake supply unit 95 that supplies dewatered cake into the incinerator 20 is provided. The dehydrated cake supply unit 95 branches in the middle, and the dryer 30 described above is provided on one of the paths, forming a dry cake supply unit 96. Each of the dehydrated cake supply unit 95 and the dried cake supply unit 96 in the present embodiment includes a hopper (not shown), a weighing conveyor (not shown), and the like, and the weighing conveyor is driven by motors M1 and M2. Further, a heat exchanger 35 using exhaust gas is connected to the dryer 30 via a heat medium. Further, as in the above-described embodiment, steam generated by using exhaust gas from another incinerator (not shown), for example, an incinerator in a garbage incineration plant is used as a heat medium for connecting the heat exchanger 35 and the dryer 30. Has been applied.
[0021]
As shown in FIG. 5, both the dehydrated cake supply unit 95 and the dried cake supply unit 96 are provided with weighing scales 93 and 94, respectively. Further, thermometers 91 and 92 are provided so that the temperature in the incinerator 20 can be measured. For example, when the incinerator 20 is a fluidized incinerator, the thermometer 91 measures the combustion gas temperature in the upper part of the furnace, and the thermometer 92 measures the fluid medium in the lower part of the furnace. Further, these thermometers 91 and 92 are connected to a switch 90 so that only one thermometer functions. These thermometers 91 and 92 are connected to weight scales 93 and 94 via a switch 90.
[0022]
During operation, the temperature inside the incinerator 20 is measured by one of the thermometers 91 and 92. When incinerating a cake formed from sewage sludge, there is an optimum temperature for incineration in the incinerator 20. For example, when the incinerator 20 is a fluidized incinerator, the temperature measured by the thermometer 91 is used. Is preferably about 800 ° C. to 850 ° C., and the temperature measured by the thermometer 92 is about 750 ° C. to 800 ° C. When the temperature in the incinerator 20 is significantly higher than the optimum temperature, the amount of the dehydrated cake supplied is increased by changing the rotation speed of the motor M1 provided in the dehydrated cake supply 95, and the dried cake supply 96 The supply amount of the dried cake is reduced by changing the rotation speed of the motor M <b> 2 provided in the above. The dry cake and the dehydrated cake are supplied into the incinerator 20 while the weights of the adjusted dried cake and the dehydrated cake are monitored by the weighing machines 93 and 94. Since the amount of heat of the dehydrated cake is smaller than the amount of heat of the dried cake, the temperature in the incinerator 20 can be reduced by the above-described operation. Similarly, when the temperature in the incinerator 20 is significantly lower than the above-mentioned optimum temperature, the supply amount of the dewatered cake is reduced by the motor M1 provided in the dehydrated cake supply unit 95, and the dehydration cake is provided in the dried cake supply unit 96. The supply of the dried cake is increased by the motor M2. The dry cake and the dehydrated cake are supplied into the incinerator 20 while the weights of the adjusted dried cake and the dehydrated cake are monitored by the weighing machines 93 and 94. Thereby, the temperature in the incinerator 20 can be increased.
[0023]
In this embodiment, the temperature in the incinerator is easily maintained at the optimum temperature by simply changing the supply ratio of the dried cake and the dewatered cake in accordance with the temperature in the incinerator obtained by the thermometer. Can be. In this case, since the calorific value of the incineration itself is directly adjusted, the temperature in the incinerator can be quickly and accurately controlled, and the self-combustion action of the incineration system itself can be controlled. As a result, self-combustion can be performed without using a fossil fuel-based auxiliary fuel, and operation can be performed at low cost. Further, in the present embodiment, the temperature in the incinerator is maintained by changing the amount of the dried cake and the dewatered cake, so that the air cooler employed in the conventional incineration system can be eliminated. Furthermore, according to the above-described embodiment, the dried cake has a high viscosity, and can have a moisture content lower than the moisture content range in which clogging is likely to occur at the time of transportation and charging. Clogging can be reduced.
[0024]
In the embodiment shown in FIG. 5, it is assumed that steam from a garbage incineration plant is used, but the other embodiments described above may be combined. Of course, the proper combination of these embodiments is within the scope of the present invention.
[0025]
【The invention's effect】
Advantageous Effects of Invention According to the inventions described in the respective claims, it is possible to provide a common effect that it is possible to provide an incineration system which is self-combustible without using fossil fuel-based auxiliary fuel and can be operated at low cost.
Further, according to the inventions described in claims 6 and 7, it is possible to provide an effect that the temperature in the incinerator can be quickly and accurately controlled and the self-combustion action of the incineration system itself can be controlled.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an incineration system according to a first embodiment of the present invention.
FIG. 2 is a schematic view showing a part of an incineration system according to a second embodiment of the present invention.
FIG. 3 is a schematic diagram showing a part of an incineration system according to a third embodiment of the present invention.
FIG. 4 is a schematic diagram of an incineration system according to a fourth embodiment of the present invention.
FIG. 5 is a schematic diagram of an incineration system according to an additional embodiment of the present invention.
FIG. 6 is a schematic diagram of a prior art incineration system.
[Explanation of symbols]
10 incineration system 20 incinerator 30 dryer 35 heat exchanger 40 air preheater 41 blower 50 exhaust gas treatment tower 61 heat pump 62 heat pump 63 heat exchanger 71 turbine 72 water-cooled condenser 81 Turbine 82 Recuperator 90 Switch 91 Thermometer 93 Weight scale 95 Dehydrated cake supply unit 96 Dry cake supply unit M1 Motor M2 Motor

Claims (7)

An incinerator,
A dryer that forms a dried cake by drying the dehydrated cake;
A dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator,
A heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer,
An exhaust gas treatment tower for removing acidic components in the exhaust gas,
Comprising a heat pump that transfers the heat of the wastewater from the exhaust gas treatment tower to the dryer.
An incineration system wherein the dryer is heated by the heat exchanger and the heat pump. An incinerator,
A dryer that forms a dried cake by drying the dehydrated cake;
A dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator,
A heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer,
A boiler that generates steam by heat of exhaust gas from the incinerator, a turbine that is rotated by the steam, a water-cooled condenser, and a heat pump that transfers heat of wastewater from the water-cooled condenser to the dryer,
An incineration system wherein the dryer is heated by the heat exchanger and the heat pump. An incinerator,
A digestion unit that digests sewage sludge,
A dewatering unit that dewaters the digested sewage sludge to form a dewatered cake;
A dryer that forms a dried cake by drying the dehydrated cake;
A dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator,
A first heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer,
A turbine that rotates by the energy of high-temperature, high-pressure air obtained by burning methane gas generated in the digestion unit; and a second heat exchanger that transfers heat of steam from the gas turbine to the dryer. ,
An incineration system wherein the dryer is heated by the first and second heat exchangers. The first incinerator,
A dryer that forms a dried cake by drying the dehydrated cake;
A dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator,
A first heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer,
A second incinerator,
A second heat exchanger that transfers the heat of the exhaust gas from the second incinerator to the dryer,
An incineration system wherein the dryer is heated by the first and second heat exchangers. An incinerator,
A dryer that forms a dried cake by drying the dehydrated cake;
A dry cake supply unit for supplying a dry cake formed by the dryer into the incinerator,
A first heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer,
A biomass fuel supply unit that supplies biomass fuel into the incinerator,
An incineration system configured to incinerate the dried cake together with the biomass fuel. The incinerator further includes a dehydration cake supply unit that supplies the dehydration cake into the incinerator, and a thermometer that measures a temperature in the incinerator. The incineration system according to claim 1, wherein a ratio of a supply amount to the incinerator is changed. An incinerator,
A dewatering cake supply unit for supplying a dewatering cake into the incinerator,
A dryer for drying a part of the dewatered cake to form a dried cake,
A dry cake supply unit that supplies the dry cake into the incinerator,
A heat exchanger that transfers the heat of the exhaust gas from the incinerator to the dryer.
An incineration system wherein a supply ratio of the dried cake and the dewatered cake to the incinerator is changed according to a temperature in the incinerator.

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