JP2015045483A - Power generation system and power generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently acquire electric power using heat generated during refuse incineration in an incinerator.SOLUTION: A power generation system using waste heat generated in an incinerator 2, includes: steam pipes 21 to 24 arranged in the incinerator 2; a water reservoir supplying water to the steam pipes 21 to 24; a plurality of heat storage tanks 31 to 34 provided outside of the incinerator 2, taking out a part of the water flowing in the steam pipes 21 to 24, and storing the water therein at temperatures within a fixed temperature range; electric boilers 51 and 52 heating the water stored in the heat storage tank 34 located in a final stage by electric heat; and a turbine device 7 generating electric power by water vapor generated in the electric boilers 51 and 52, the heat storage tanks 31 to 34 being configured so that a temperature range of the heat storage tanks 31 to 34 arranged in front stages are set higher than that of the heat storage tanks 31 to 34 arranged in rear stages.

Description

  The present invention relates to a power generation system and a power generation method using heat generated in an incinerator.

  In the recent Great East Japan Earthquake, houses were washed away by the tsunami, many people were damaged, and there was an accident that a large amount of radioactive material leaked because the nuclear power plant reactor was damaged by the earthquake and tsunami did. Therefore, the use of energy resources (renewable energy) replenished constantly (or repetitively) by natural forces such as sunlight, wind power, hydropower, geothermal heat, solar heat, etc. has been attracting attention.

  As an example of using such renewable energy, there is one using heat generated when garbage is burned in an incinerator (for example, Patent Document 1). The technique which concerns on patent document 1 is a technique which produces warm water using the heat | fever discharged | emitted in an incinerator. It is also possible to generate power using the hot water utilized in this way.

Special table 2013-513085 gazette

  However, in the technique disclosed in Patent Document 1, since the loss of heat generated from the incinerator is not sufficient, for example, when generating power using such a system, the power generation efficiency is not sufficient. There is.

  Therefore, the present invention solves the above problems, and a power generation system and a power generation method capable of efficiently generating electric power using heat generated when incineration of garbage in an incinerator. The purpose is to provide.

  In order to solve the above problems, the present invention is a power generation system using waste heat generated in an incinerator, a steam pipe piped in the incinerator, a water receiving tank for supplying water to the steam pipe, Outside the incinerator, take out a part of the water circulating in the steam pipe and store the water in the heat storage tank located at the last stage among the multiple heat storage tanks that store water at a certain range of temperature and the plurality of heat storage tanks It is equipped with an electric heating device that heats by electric heat and a turbine device that generates electric power using water vapor generated from the electric heating device. The temperature range is set high.

Another invention is a power generation method using waste heat generated in an incinerator,
(1) A water supply process for supplying water from a water receiving tank to a steam pipe installed in the incinerator;
(2) A portion of the water flowing through the steam pipes piped in the incinerator is sequentially taken out, stored in a plurality of heat storage tanks provided outside the incinerator at a certain temperature range, and then in the incinerator. Storage heat treatment to return to
(3) Among the plurality of heat storage tanks, an electrothermal treatment for heating the water in the heat storage tank located at the last stage by electric heat;
(4) including a power generation process for generating power by supplying steam generated by the electrothermal treatment to the turbine device,
In heat storage heat treatment, the temperature range of the heat storage tank arranged in the subsequent stage is set higher than the temperature range of the heat storage tank arranged in the previous stage for a plurality of heat storage tanks, and the water stored in the heat storage tank in the previous stage is incinerated. After returning to the furnace and further heating the returned water in the incinerator, it is taken out again and stored in a subsequent heat storage tank to gradually increase the temperature range.

  According to the present invention as described above, since a plurality of heat storage tanks that accumulate hot water having different temperature ranges are used, it is possible to accumulate and utilize hot water having a low temperature, and therefore, the amount of heat generated from the incinerator. Loss can be suppressed. And in this invention, since the temperature range of the heat storage tank arrange | positioned in the back | latter stage becomes higher than the temperature range of the heat storage tank arrange | positioned in the front | former stage, since water vapor | steam is generated using hot water with a high temperature. The electric power used for generating water vapor can be suppressed. Thus, according to this invention, electric power can be efficiently generated using the heat at the time of incineration of garbage in an incinerator.

  Furthermore, in the above-described invention, the steam heating unit further stores the steam generated in the electric heating device, and the steam from the electric heating device is supplied to the turbine device via the steam heading unit and is stored in the steam heading unit. Part of the steam is preferably supplied to a plurality of heat storage tanks. In this case, since the steam provided to the turbine device can be accumulated by the steam header unit for pressurizing and heating the steam, the steam having a predetermined pressure and flow rate can be supplied to the turbine device. . Further, according to the present invention, a part of the steam accumulated in the steam header section is supplied to the plurality of heat storage tanks, so that the hot water generated when used in the turbine device is supplied again into the heat storage tank. Therefore, the loss of heat generated from the incinerator can be suppressed, and the power generation efficiency can be further improved.

  In the above-mentioned invention, the flue section for leading out the smoke generated in the incinerator in the horizontal direction, the water spray means disposed horizontally in the upper portion of the flue and spraying water into the flue section, and the smoke in the flue section It is preferably a wall-like member disposed so as to block a part or all of the cross section of the passage path, and a plurality of louver portions in which a large number of slits penetrating the front and back are formed.

  Here, soot refers to those containing incompletely burned particles that are generated by the combustion of things, for example, sulfur oxide, soot, harmful substances (cadmium, chlorine and hydrogen chloride, fluorine, fluorine, etc.). Air pollutants such as hydrogen fluoride and silicon fluoride, lead and its compounds, nitrogen oxides and dioxins).

  In this case, the flue section that leads out the smoke in the horizontal direction is equipped with water sprinkling means for sprinkling water into the flue section, so that the contamination contained in the smoke that passes through the flue section to the sprinkled water. Can contact substances and adsorb pollutants in water. Thereby, since the water containing a pollutant can be collect | recovered as a waste_water | drain, it can prevent discharging | emitting smoke.

  Further, according to the present invention, the flue portion is formed with the gallery portion of the wall-like member disposed so as to block a part or all of the cross section of the passage of smoke so that the flow of smoke flows. And an air flow path for adsorbing contaminants to water can be secured.

  Further, according to the present invention, the gallery portion is formed with a plurality of gallery portions in which a large number of slits penetrating the front and back sides are formed, so that smoke can flow into the slits. Thereby, the air flow path in a flue part can be maintained appropriately, it can prevent that the combustion of an incinerator falls, and generation | occurrence | production of incomplete combustion substance can be suppressed.

  In addition, since the water sprayed from the sprinkling means covers the surface of the louvered part, the flue gas flowing into the slit part will be adsorbed by the water on the louvered part surface, resulting in higher removal. The effect can be demonstrated.

  As described above, according to the power generation system and the power generation method, it is possible to obtain electric power by efficiently using the heat generated when incineration of garbage in the incinerator.

It is the schematic which shows the whole structure of the electric power generation system which concerns on this embodiment. (A) is a side view which shows the structure of the smoke exhaustion equipment which concerns on this embodiment, The same figure (b) is a top view which shows arrangement | positioning of the louver part in a smoke exhaustion equipment, The same figure (c) FIG. 3 is a top view showing the arrangement of watering means in the smoke exhausting facility. It is a flowchart figure which shows the electric power generation method which concerns on this embodiment. It is the schematic which shows the structure of the smoke exhaustion equipment which concerns on a modification.

  Hereinafter, an embodiment of a power generation system according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a conceptual diagram showing the overall configuration of the power generation system according to the present embodiment.

  As shown in FIG. 1, the present invention is a power generation system that uses waste heat generated in an incinerator 2, in which a water receiving tank 1 that stores water serving as a medium for recovering exhaust heat, incinerates garbage and the like. An incinerator 2, a heat storage tank 3 (31 to 34) for storing water heated by the heat of the incinerator 2, electric boilers 51 and 52 for heating water in the heat storage tank 3 by electric heat, The turbine apparatus 7 that generates electric power using water vapor generated from the gas turbine 52 and the smoke exhausting facility 8 that discharges the smoke generated from the incinerator 2 to the outside are schematically configured.

  In this embodiment, the water receiving tank 1 stores therein soft water obtained by softening hard water such as tap water (for example, calcium removal), and the temperature of the water in the water receiving tank is about 15 degrees. Set to The water receiving tank 1 is connected to steam pipes 21 to 27 piped in the incinerator 2, and the water receiving tank 1 supplies water to the steam pipes 21 to 27 in the incinerator 2. Yes.

  The incinerator 2 is formed of a metal member having heat resistance, and is an incinerator for incinerating household combustible waste, for example. In the present embodiment, the temperature in the incinerator 2 is about 500 to about 900 degrees. Become. And in this incinerator 2, the steam pipes 21-24 which are the piping which warms the water supplied from the water receiving tank 1 with the waste heat in the incinerator 2 and supplies the warm water to the heat storage tanks 31-34 are arrange | positioned. Is done. Specifically, as the steam pipe for supplying warm water to the heat storage tanks 31 to 34, the steam pipe 21 connected to the water receiving tank 1 and the heat storage tank 31 located in the foremost stage, the heat storage tank 31, and the second stage heat storage tank 31. The steam pipe 22 connecting the heat storage tank 32 and the third stage heat storage tank 33, the steam pipe 23 connecting the heat storage tank 31 and the second stage heat storage tank 31, and the heat storage It is comprised from the steam pipe 24 which connects the tank 33 and the thermal storage tank 34 located in the last stage.

  Further, the incinerator 2 has steam pipes 25 to 27 for supplying steam generated by the heat in the incinerator 2 to the steam header 4. In the present embodiment, the pipe 28 extending from the water receiving tank 1 is connected to one end of the steam pipes 25 to 27, and the steam introducing pipe 41 extending from the steam header 4 is connected to the other end of the steam pipes 25 to 27. The steam generated by the exhaust heat in the incinerator 2 is supplied to the steam header unit 4. The pipe 28 between the water receiving tank 1 and the incinerator 2 is provided with valves 2a and 2b for controlling the pressure and flow rate of water.

  The steam header 4 is a tank device that accumulates and distributes the steam generated in the incinerator 2 and pressurizes and heats the steam, and includes a body part for storing steam inside, and a steam introduction pipe at the upper part of the body part. 41 and a steam discharge pipe 42 at the bottom. The steam discharge pipe 42 is connected to each of the heat storage tanks 31 to 34, and supplies the steam in the body portion to each of the heat storage tanks 31 to 34 to warm the heat storage tanks 31 to 34. The steam introduction pipe 41 and the steam discharge pipe 42 are provided with valves 4a and 4b for controlling the pressure and flow rate of the steam, respectively.

  Although not shown, the steam header 4 has a control device that detects the internal pressure with a sensor and adjusts the steam pressure in the steam header. The steam temperature is 100 degrees.

  The heat storage tanks 31 to 34 are devices that take out a part of hot water flowing through the steam pipes 21 to 24 outside the incinerator 2 and store the water at a certain range of temperatures. In this embodiment, it is comprised from the four heat storage tanks 31-34, each heat storage tank 31-34 is connected sequentially via the steam pipes 22-24, and the pressure of warm water is respectively between the steam pipes 22-24. -Valves 31a to 33a for controlling the flow rate are provided.

  And by controlling opening and closing of these valves 31a to 33a, the amount of water is adjusted to adjust the temperature in each of the heat storage tanks 31 to 34, than the temperature range of the heat storage tanks 31 to 33 arranged in the previous stage, The temperature range of the heat storage tanks 32 to 34 disposed in the subsequent stage is set high.

  In the present embodiment, the uppermost heat storage tank 31 is set so that the temperature of the hot water is 40 degrees or higher, and the temperature of the second stage heat storage tank 32 is such that the temperature of the stored hot water is 60 degrees or more. The third stage heat storage tank 33 is set so that the temperature of the stored warm water is 80 degrees or more, and the last stage heat storage tank 34 is such that the temperature of the stored warm water is 90 degrees or more. Is set to Further, the amount of water stored in the heat storage tanks 31 to 33 is about 50 t (tons), and the amount of water stored in the last heat storage tank 34 is about 100 t (tons).

  Among the plurality of heat storage tanks 31 to 34, the heat storage tank 34 located at the last stage is connected to the electric boilers 51 and 52 via the pipe 35, and supplies the hot water in the heat storage tank 34 to the electric boilers 51 and 52. It is supposed to be. The pipe 35 is separated so as to be connected to the electric boilers 51 and 52, and valves 5a and 5b are provided in the branched pipe portions, respectively.

  The electric boilers 51 and 52 are heating devices that heat the hot water supplied from the heat storage tank 34 by electric heat and generate steam having a pressure exceeding the atmospheric pressure, and are provided with a plurality of electric heaters. This electric heater can use an external power source (not shown) or power generated from a steam turbine as a power source.

In the present embodiment, the heat transfer area contributing to the heat transfer of the heat exchange device in the electric boiler is set to comply with the law. That is, the heat transfer area is set to be an area obtained by converting the maximum installation capacity by regarding the electric installation capacity 20 kW (kilowatt) as 1 square meter. In the present embodiment, 100 cylindrical electric heaters having a diameter of 10 cm and a length of 1 m and a capacity of 200 kw are used, and the electric installation capacity is
Electric equipment capacity = 200kw × 100 = 20,000kw
And its heat transfer area is
Heat transfer area = 20,000 kw / 20 = 1000 m ²
It becomes.

  And in each electric boiler 51,52, it connects to the vapor | steam header part 6 via the piping 53,54, the hot water supplied from the thermal storage tank 34 is evaporated at 100 t / h, and the generated water vapor | steam is a vapor | steam header part. 6 is supplied.

  The steam header 6 is a tank device for accumulating and distributing water vapor generated in the electric boilers 51 and 52, and pressurizing and heating the steam, and a body part for storing the steam therein, and the steam in the body part. It has piping 53, 54 to be steam introduction pipes to be introduced, and a steam discharge pipe 61 for discharging steam. The pipes 53 and 54 are provided with valves 6a and 6b, and control of steam pressure and flow rate is executed. Then, the steam from the electric boilers 51 and 52 is supplied to the turbine device 7 via the steam discharge pipe 61 of the steam header 6. Note that the number of turbine devices connected to the steam header 6 is not limited, and a plurality of turbine devices 7 can be connected.

  The turbine device 7 is a device that generates electric power using the steam supplied from the steam header 6, and supports the impeller 71 that generates a rotational motion when the steam is injected, and the impeller 71. A central shaft 72 to which the rotational motion is transmitted, and a generator 73 that is provided on the central shaft 72 and generates electric power by the transmitted rotational motion.

  In the present embodiment, the maximum output of the generator 73 is 200,000 kW. And the electric power which generate | occur | produced from the generator 73 is accumulate | stored in the electrical storage device which is not shown in figure. Further, the turbine device 7 includes a switching unit 74 that distributes the used steam to other devices. The switching unit 74 is a tank device that accumulates the steam used in the turbine device 7 and supplies the steam to the heat storage tank 34 or the electric boiler 51. By reusing the steam used in the turbine device 7, It has the advantage of improving thermal efficiency. Specifically, the switching unit 74 is connected to the heat storage tank 34 via a pipe 75, and the temperature, quantity, and water level of the heat storage tank 34 can be adjusted by supplying steam to the heat storage tank 34. .

  On the other hand, the switching unit 74 is also connected to the electric boiler 51 via a pipe 77. A decompressor 76 such as a valve for reducing the pressure of the steam supplied to the electric boiler 51 is provided between the switching unit 74 and the electric boiler 51. By adjusting the steam to a predetermined pressure by the decompressor 76, a sudden change in atmospheric pressure is prevented to prevent water hammer (water hammer action), and equipment in the electric boiler 51 is protected. ing. Further, by reducing the pressure of the steam by the decompressor 76, the inside of the decompressor 76 can be brought close to vacuum, and the rotational driving force of the turbine device 7 can be increased via the pipe 77, so that a larger output can be obtained. become able to.

  Next, the smoke exhausting facility 8 will be described with reference to FIG. 2A is a side view showing the structure of the smoke exhausting equipment 8, FIG. 2B is a top view showing the arrangement of the louvered portion 85 of the smoke exhausting equipment 8, and FIG. It is a top view which shows arrangement | positioning of the water sprinkling means of the smoke exhaustion equipment 8. FIG.

  As shown in FIGS. 1 and 2, the flue gas facility 8 has a flue portion 80 a that projects from the upper part of the incinerator 2 through the pipe 29 and leads the soot generated in the incinerator 2 in the horizontal direction, Connected via a pipe 80c, connected to a flue section 80a, composed of a chimney section 80b that discharges smoke from which harmful substances have been removed from the smoke, and a filter section 82 that purifies waste liquid containing the harmful substances. The

  Here, the soot refers to those containing incompletely burned particles generated by combustion in the incinerator 2, for example, sulfur oxide, dust, harmful substances (cadmium, chlorine and hydrogen chloride, fluorine, And air pollutants such as nitrogen fluoride and dioxin).

  As shown in FIGS. 2A to 2C, the flue portion 80a is a water spray means 84 for spraying water into the flue portion 80a and a wall-like member disposed in the flue portion 80a. It is formed from a louver part 85 and a drain pan 86 for storing the sprinkled water at the lower part in the flue part 80a.

  The watering means 84 is means for spraying mist-like or granular water. In this embodiment, the water pressure and the air volume are adjusted to spray water at a predetermined watering pressure. Such water sprinkling means 84 is disposed in the horizontal direction in the upper part in the flue portion 80a, and as shown in FIG. 2 (c), each position is sprayed with mist or granular water. A water outlet 84 a is arranged, and by sprinkling water from the water outlet 84 a, pollutants that mean each material of soot flowing in the flue portion 80 a are adsorbed in contact with the water spray and stored in the drain pan 86. Go.

  As shown in FIG. 2B, the louver portions 85 are arranged in a staggered manner so as to block a part or all of the cross-section of the passage of smoke in the flue portion 80a. The gallery portion 85 has a large number of slits penetrating the front and back, so that smoke can pass through the slit portion. Further, the garage portion 85 has its surface coated with water sprayed from the water sprinkling means 84 and adsorbs smoke particles flowing into the slit portion.

  The drain pan 86 is a container that temporarily stores water containing pollutants, and the water that has flowed into the drain pan 86 flows into the filter portion 82 through a drain pipe located below. A plurality of filter nets 82a having a predetermined filtration accuracy for filtering contaminants are arranged in the filter unit 82 so as to collect the contaminants. The filtered and purified water is discharged to the sewer.

  In addition, about each apparatus demonstrated above, the metal member which has heat resistance with respect to the set temperature, such as a nickel base alloy and a cobalt base alloy shall be used. In addition, each device is provided with a temperature sensor, a pressure sensor, a flow rate sensor and the like (not shown), and the pressure, flow rate, and temperature of water and steam flowing out and inflow from each device by a control device such as a CPU. Is to be controlled.

(Power generation method)
By operating the power generation system described above, the power generation method of the present invention can be implemented. FIG. 3 is a flowchart showing the power generation method according to this embodiment.

  In the power generation method using the waste heat generated in the incinerator 2 in the present embodiment, first, a water supply process for supplying water from the water receiving tank 1 to the steam pipes 21 to 24 piped in the incinerator 2 is performed (S101). ). And one part of the water which distribute | circulates the inside of the steam pipes 21-24 piped in the incinerator 2 is taken out one by one, and the several heat storage tanks 31-34 provided in the exterior of the incinerator 2 are made into the temperature of a fixed range. After the water is stored, the heat storage heat is returned to the incinerator 2 (S102).

  Under the present circumstances, about the some heat storage tanks 31-34, the temperature range of the heat storage tanks 31-34 arrange | positioned in the back | latter stage is set higher than the temperature range of the heat storage tanks 31-34 arrange | positioned in the front | former stage. The water stored in 31 to 34 is returned to the incinerator 2, and the returned water is further heated in the incinerator 2. Then, the water is taken out again and stored in the subsequent heat storage tanks 31 to 34, so that the temperature is increased. Increase the range.

  And the water in the thermal storage tanks 31-34 located in the last stage among the several thermal storage tanks 31-34 is supplied to the electric boilers 51, 52, warm water is heated by the electric heat of the electric boilers 51, 52, and water vapor | steam is supplied. An electrothermal treatment is performed to generate (S103).

  Thereafter, steam accumulation processing for accumulating water vapor generated in the electric boilers 51 and 52 in the steam header 6 is performed (S104). And the power generation process which supplies the water vapor | steam generate | occur | produced by the electrothermal treatment to the turbine apparatus 7, and generates electric power is performed (S105). At this time, the water vapor from the electric boilers 51 and 52 is supplied to the turbine device 7 via the steam header 6. Further, a part of the steam accumulated in the steam header 6 is supplied to the heat storage tank 34.

  On the other hand, the smoke generated from the incinerator 2 is introduced into the flue portion 80a and the smoke removal process is executed (S106). Specifically, water sprinkling means 84 disposed in the upper part of the flue portion 80a sprinkles water into the flue portion 80a, and attaches water to the pollutants in the smoke so that water containing the pollutants is contained. Is stored in the drain pan 86 below the flue portion 80a.

  The smoke from which the pollutants are removed is discharged to the outside from the chimney 80b. On the other hand, the water in the drain pan 86 is then filtered for contaminants in the filter unit 82, and the water from which the contaminants have been removed is discharged into the sewer.

(Action / Effect)
According to such this embodiment, it is provided with a plurality of heat storage tanks 31 to 34 that accumulate hot water having a temperature range different from 40 degrees, 60 degrees, 80 degrees, and 90 degrees, and accumulates warm water having a low temperature. Since it is utilized, the loss of heat generated from the incinerator 2 can be suppressed. Furthermore, according to the present embodiment, the temperature range of any one of the heat storage tanks 32 to 34 disposed in the subsequent stage is higher than the temperature range of any one of the heat storage tanks 31 to 33 disposed in the previous stage. Since water in the heat storage tank 34 in which hot water having the highest temperature is stored is heated by electric heat to generate water vapor, the power used for generating water vapor can be suppressed. As described above, according to the present embodiment, it is possible to efficiently generate electric power while suppressing a loss of heat generated when incinerators are incinerated.

  In the present embodiment, since the steam from the electric boilers 51 and 52 is accumulated by the steam header 6 and then supplied to the turbine device 7, the steam generated from the two electric heating devices is collected and the steam is collected. The turbine apparatus can be supplied at a predetermined pressure and flow rate.

  Moreover, in this embodiment, since a part of the vapor | steam accumulate | stored in the vapor | steam header 6 is supplied again, for example to the thermal storage tank 34, the loss of the calorie | heat amount in a thermal storage tank is suppressed more, and it is more efficient in electric power generation. Can be improved.

  Furthermore, in this embodiment, since it has the smoke exhausting equipment 8 provided with the water sprinkling means 84 and the louver part 85, the smoke which passes the flue part 80a, first, has a part or all of the passage path | route cross section of soot. By the louver portions 85 arranged in a staggered manner so as to be closed, an air flow path meandering is provided. And by spraying the soot flowing in this way from the upper part by the sprinkling means 84, the particles of the pollutant contained in the soot are adsorbed in contact with the sprinkled water. It is possible to prevent soot from being emitted.

  Furthermore, since a large number of slits penetrating the front and back surfaces are formed in the gallery portion 85, soot can be caused to flow into the slits. At this time, since the water sprayed from the sprinkling means 84 covers the surface of the gallery portion 85, the flue gas flowing into the slit portion is adsorbed by the contaminant on the surface of the gallery portion 85. Higher removal effect can be exhibited.

By using the power generation system described above for incineration facilities throughout the country and implementing the power generation method, it is possible to generate a large amount of power and contribute to the nuclear power plant problem and the environmental problem. Specifically, since there are 1243 incinerators nationwide in FY2008, if electricity is supplied using an electric boiler having 100 electric heaters with a capacity of 200 kw as described above, the power used (kw ) Is 20,000 (kw) x 1243 (units) = 24.86 million (kw)
It becomes.

On the other hand, since the electric power output from the turbine device 7 is 200,000 kw, the nationally generated power (kw) is
200,000 (kw) x 1243 (units) = 248.6 million kw
It becomes.

Therefore, the acquired power (kw) is
248.6 million (kw)-24.86 million (kw) = 227.44 million (kw)
As a result, a larger amount of power can be supplied.

  For example, these electric powers are purchased by an electric power company and transmitted to substation facilities, factories, and houses. In this case, for example, it is preferable that the country manages and separates the power generation business and the power transmission business. Further, if the smoke exhausting facility 8 by this power generation system is used in each country, it is possible to delete 25% of the greenhouse gas and contribute to the global environment.

(Example of change)
The description of each embodiment described above is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made according to the design or the like as long as the technical idea according to the present invention is not deviated. For example, in the above-described embodiment, the contaminant is filtered in the filter unit 82 and the water is discharged into the sewer. However, the present invention is not limited to this. For example, the water is sprayed from the watering means. It can also be used for water.

  That is, as shown in FIG. 4, after removing contaminants by the filter unit 82, the filter unit 81 is further used for filtration and cleaning. The filtering device 81 is connected to the cooling tower 88 via the pipe 87 and cools the water filtered by the cooling tower 88. Specifically, water is sprayed and cooled by a fan 88 a provided in the cooling tower 88.

  The cooling tower 88 is connected to the sprinkling means 84 via a pipe 89 and a sprinkling pipe 83, and the cooled water is supplied to the sprinkling means 84 through the pipe 89 and the sprinkling pipe 83. Pumps 87a and 89a are respectively provided in the pipe 87 portion from the filtration device 81 to the cooling tower 88 and the pipe 89 portion from the cooling tower 88 to the water spray means 84, and the cooling tower 88 and Water is supplied to the watering means 84.

  The pump 87a also has a back washing function for washing the smoke exhausting equipment 8 by causing the water cooled by the cooling tower 88 to flow backward to the filtration device 81 side. Specifically, the water backflowed by the pump 87a causes the pollutant accumulated in the filtering device 81 to flow into the filter part 82 and further flows into the pipe 82b including the pollutant accumulated in the filter part 82. become. Thereby, the inside of the filtration apparatus 81 and the filter part 82 can be wash | cleaned. The contaminated water that has flowed from the pipe 82b is, for example, flowed into a sewer, or accumulated in a predetermined tank and discarded.

  According to such a modified example, the pollutant can be removed from the contaminated water used to remove the pollutant from the smoke, and the purified water can be reused for spraying. Can contribute.

  Further, for example, in the above-described embodiment, the electric boilers 51 and 52 are configured to be driven using an external power source. However, the present invention is not limited to this, and for example, is driven with a small amount of power at the beginning. The turbine apparatus 7 may be rotationally driven using a small water tube boiler to generate electric power, and after the output of the generator 73 is stabilized, the electric boilers 51 and 52 may be switched to operate. In this case, the small water tube boiler is connected to the heat storage tank 34 via a pipe to provide hot water of 90 degrees or more. Further, the small water tube boiler is connected to the steam header 6 via a pipe, and the steam generated in the small water tube boiler is supplied to the steam header 6. According to such a modification, it is possible to generate power without using an external power source, and as a result, it is possible to further improve the power generation efficiency.

DESCRIPTION OF SYMBOLS 1 ... Receiving tank 2 ... Incinerator 2a, 2b ... Valve 3 ... Heat storage tank 4 ... Steam header 4a, 4b ... Valve 5a, 5b ... Valve 6 ... Steam header 6a, 6b ... Valve 7 ... Turbine device 8 ... Smoke Equipment 21-27 ... Steam pipe 28 ... Pipe 29 ... Pipe 31 ... Heat storage tank 31a-33a ... Valve 31-34 ... Heat storage tank 34 ... Heat storage tank 35 ... Pipe 41 ... Steam introduction pipe 42 ... Steam discharge pipe 51, 52 ... Electricity Boiler 53, 54 ... Piping 61 ... Steam exhaust pipe 71 ... Impeller 72 ... Center shaft 73 ... Generator 74 ... Switching section 75, 77 ... Piping 76 ... Decompressor 80a ... Flue section 80b ... Chimney section 80c ... Piping 81 ... Filtration device 82 ... Filter part 82a ... Filter network 82b ... Piping 83 ... Sprinkling pipe 84 ... Sprinkling means 84a ... Sprinkling port 85 ... Gripping part 86 ... Drain pan 87 ... Piping 87a, 89 a ... pump 88 ... cooling tower 88a ... fan 89 ... piping

Claims (5)

A power generation system using waste heat generated in an incinerator,
A steam pipe piped in the incinerator;
A water receiving tank for supplying water to the steam pipe;
Outside the incinerator, a plurality of heat storage tanks for taking out a part of the water circulating in the steam pipe and storing the water at a certain range of temperature,
Among the plurality of heat storage tanks, an electric heating device that heats the water in the heat storage tank located at the last stage by electric heat;
A turbine device that generates electric power by steam generated from the electric heating device,
In the plurality of heat storage tanks, the temperature range of the heat storage tank disposed in the subsequent stage is set higher than the temperature range of the heat storage tank disposed in the previous stage. It further comprises a steam header unit that accumulates steam generated by the electric heating device,
The steam from the electric heating device is supplied to the turbine device via the steam header unit, and a part of the steam accumulated in the steam header unit is supplied to the plurality of heat storage tanks. The power generation system according to claim 1. A flue section for horizontally deriving soot generated in the incinerator;
Watering means disposed horizontally in the upper part of the flue part and for sprinkling water into the flue part;
A wall-like member disposed so as to block a part or all of a cross-section of the passage of smoke in the flue portion, and a plurality of gallery portions in which a large number of slits penetrating the front and back are formed. The power generation system according to claim 1 or 2. A power generation method using waste heat generated in an incinerator,
A water supply process for supplying water from a water receiving tank to a steam pipe installed in the incinerator;
After sequentially taking out a part of the water flowing through the steam pipe piped in the incinerator and storing the water in a plurality of heat storage tanks provided outside the incinerator at a certain range of temperature, the incinerator Heat storage heat storage
Among the plurality of heat storage tanks, an electrothermal treatment for heating the water in the heat storage tank located at the last stage by electric heat;
A power generation process for generating power by supplying steam generated by the electrothermal treatment to a turbine device,
In the heat storage heat treatment, for the plurality of heat storage tanks, the temperature range of the heat storage tank disposed in the subsequent stage is set higher than the temperature range of the heat storage tank disposed in the previous stage, and the water stored in the heat storage tank in the previous stage is stored. The power generation method is characterized in that after returning to the incinerator and further heating the returned water in the incinerator, the temperature is gradually increased by taking it out again and storing it in a subsequent heat storage tank. Prior to the power generation process, further includes a steam accumulation process for accumulating water vapor generated in the electric heating device in a steam header.
In the power generation process, water vapor from the electric heating device is supplied to the turbine device via the steam header unit, and in the heat storage process, a part of the steam accumulated in the steam header unit is the plurality of steam units. The power generation method according to claim 4, wherein the power generation method is supplied to a heat storage tank.