JP6507006B2 - Fluidized bed incinerator - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a fluidized bed incineration apparatus which fluidizes and incinerates an object to be treated by flowing air supplied to a fluidized bed incinerator.

  As such a fluidized bed incineration facility, for example, Patent Document 1 discloses a fluidized bed furnace which burns an object to be treated such as sewage sludge while flowing it with flowing air, combustion exhaust gas discharged from the fluidized bed furnace and a flow An air preheater that exchanges heat with the air, a dust collector that removes dust from the combustion exhaust gas discharged from the air preheater, and a turbocharger that generates compressed air from the combustion exhaust gas that is dusted by the dust collector ( A pressurized flow furnace installation with a turbocharger) is described. The compressed air generated by the supercharger is supplied as fluidizing air to the fluidized bed furnace through the air preheater.

JP 2014-190572 A

  By the way, in such a fluidized bed incineration facility, the waste heat of the combustion exhaust gas discharged from the fluidized bed furnace and the combustion exhaust gas discharged from the air preheater is recovered by the waste heat boiler, and the combustion exhaust gas removed of dust is externally removed. Heat is recovered from the circulating water of the flue gas treatment tower that carries out treatment to discharge the However, especially when the material to be treated is sewage sludge, when the water content of the dewatered sludge decreases due to the improvement of the capacity of the dewatering facility, self-combustion operation is possible in the fluid bed furnace without the need for auxiliary fuel. The temperature may become too high and the amount of heat that can be recovered from the flue gas may increase.

  Here, as means for coping with such an increase in the amount of heat generated by incineration, it is conceivable to recover heat from the combustion exhaust gas. For example, with means for recovering heat in the fluidized bed furnace as a boiler structure, the equipment becomes complicated and the cost In particular, in the pressurized fluidized bed furnace described in Patent Document 1, it is difficult to adopt the boiler structure itself because the diameter of the fluidized bed furnace is reduced. In addition, the problem of adhesion of dust to the boiler also occurs. Furthermore, it is conceivable to provide a waste heat boiler in the discharge path of the combustion exhaust gas discharged from the dust collector, but in this case it is necessary to secure the installation space of the waste heat boiler and the facility will have to be enlarged. .

  The present invention has been made under such a background, and aims to recover heat from combustion exhaust gas stably and efficiently over a long period of time without increasing the size and complexity of equipment and increasing costs. The purpose is to provide a fluid bed incinerator capable of

In order to solve the above problems and achieve such an object, a fluidized bed incineration plant according to the present invention is firstly a fluidized bed incinerator which burns an object to be treated while flowing it by means of flowing air; And a dust collector for removing combustion exhaust gas discharged from the fluidized bed incinerator with a filter, and an exhaust gas for discharging the combustion exhaust gas discharged from the dust collector to a discharge path for discharging the combustion exhaust gas removed by the filter. A plurality of Stirling engine generators are attached to the duct, and the plurality of Stirling engine generators are spaced apart in the venting direction of the combustion exhaust gas in the exhaust gas duct and are adjacent to the venting direction of the combustion exhaust gas. Spirally arranged so that the Stirling engine generators are at different positions in the circumferential direction of the exhaust gas duct It is characterized in that it is attached to.
Second, in the fluidized bed incineration plant of the present invention, a fluidized bed incinerator which combusts an object to be treated while flowing it by flowing air and combusts the flue gas discharged from the fluidized bed incinerator by means of a filter. A plurality of Stirling engine generators are attached to a discharge path provided with a dust collector and discharging the combustion exhaust gas removed by the filter, and the dust collector is provided with an inflow chamber into which the combustion exhaust gas flows in at the lower part. A container provided with a discharge chamber, which is the discharge path from which the above-mentioned combustion exhaust gas is discharged to the upper part, is discharged, a partition separating the inflow chamber and the discharge chamber of the container, and The plurality of Stirling engine generators are circumferentially spaced on the inner wall surface of the discharge chamber. Only together are mounted, between the adjacent Stirling engine generator adjacent to the circumferential direction, the rectifying plate extending vertically and being provided on the inner wall surface.

  As is well known, a Stirling engine generator, for example, connects a displacer piston housed in a cylinder and a power piston to a crankshaft, makes one end of this cylinder a heater (heating unit) and the other end a cooling unit The crankshaft is rotated by the volume change of gas in the cylinder due to the temperature difference, power is generated by the generator connected to the crankshaft, and the larger the temperature difference between the heater part and the cooling part, the larger the electric power Generate.

  Therefore, in the fluidized bed incineration facility of the above configuration, in which such a Stirling engine generator is attached to the high temperature flue gas discharge path, which is usually 450 ° C. or higher, the excess heat of the flue gas is efficiently recovered as electric power. be able to. In addition, since the Stirling engine generator may be attached to the exhaust gas discharge path originally provided in the fluidized bed incineration facility, the facility does not become large in size, complicated, and cost-increasing.

  Furthermore, since the Stirling engine generator is attached to the discharge path of the relatively clean flue gas dusted off by the filter of the dust collector, the heater portion of the Stirling engine generator is directly exposed to the flue gas and heated. For example, there is no reduction in the amount of power generation due to adhesion of dust and the like in the combustion exhaust gas as in the case of heat recovery by exposure to the combustion exhaust gas before dust removal, and high power generation efficiency can be obtained over a long period of time. In addition, since the exhaust gas from which dust is removed is also reduced in corrosiveness, there is also an advantage that the selection range of the material of the Stirling engine generator is broadened, and a cheaper material can be selected to reduce the cost.

Here, in the first fluidized bed incineration facility of the present invention, such a Stirling engine generator is attached to an exhaust gas duct through which the combustion exhaust gas discharged from the dust collector passes . In such a case, by attaching a Stirling engine generator so that the heater portion penetrates the exhaust gas duct, as described above, the heater portion can be directly exposed to combustion exhaust gas to be heated, and more efficient power generation It can be performed.

Further, in the first fluidized bed incineration facility of the present invention in which the Stirling engine generator is attached to the exhaust gas duct in this manner, a plurality of Stirling engine generators are attached at intervals in the ventilation direction of the combustion exhaust gas in the exhaust gas duct Even when the heating unit of the Stirling engine generator is penetrated into the exhaust gas duct and attached as described above when the inner diameter of the exhaust gas duct is small, interference between the heating parts is prevented to perform more efficient heat recovery As well as preventing the flow of the flue gas in the flue gas duct. Moreover, by adjusting the number of Stirling engine generators to be started according to the temperature of the combustion exhaust gas, it is possible to cope with the change of the exhaust gas temperature easily and finely.

And, in the first fluidized bed incinerator of the present invention in which a plurality of Stirling engine generators are attached at intervals in the ventilation direction of the combustion exhaust gas of the exhaust gas duct in this way, the Stirling engine generators adjacent to this ventilation direction By arranging them spirally so as to be at different positions in the circumferential direction of the exhaust gas duct, it is possible to prevent heating by the combustion exhaust gas to the Stirling engine generator located on the aeration direction side from being hindered and The flow of the flue gas in the duct can be further stabilized. In addition, when a plurality of Stirling engine generators are similarly installed at intervals in the ventilation direction of the combustion exhaust gas, among the plurality of Stirling engine generators, from the Stirling engine generator positioned closest to the dust collector side By providing control means for starting the Stirling engine generator sequentially, heat can be recovered from the combustion exhaust gas at a higher temperature, which is efficient, and when the Stirling engine generator is additionally started, it is already started. Because the amount of heat of the combustion exhaust gas supplied to the Stirling engine generator does not fluctuate, stable power generation can be performed.

On the other hand, in the second fluidized bed incinerator of the present invention, the dust collector, the discharge chamber to the upper together with the inflow chamber below the combustion exhaust gas flows is provided is the discharge path flue gas is dedusted is discharged a container is provided, a partition separates the discharge chamber and the inlet chamber of the container, when the internal hung on the partition wall is a bag filter or the like and a filter communicating with the discharge chamber, the plurality A Stirling engine generator is mounted in the discharge chamber of the bag filter . In this case, the power generation can be performed by the higher temperature flue gas, which is more efficient.

And, in this case , in the second fluidized bed incineration facility of the present invention, a plurality of Stirling engine generators are attached to the inner wall surface of the discharge chamber at intervals in the circumferential direction, and at this time , they are adjacent in the circumferential direction. A vertically extending rectifying plate is provided on the inner wall surface between the Stirling engine generators , thereby allowing the filter to be suspended without interfering with the dividing wall and the rectifying plate in the discharge chamber of the dust exhaust combustion exhaust gas. The flow can be arranged to efficiently heat the individual Stirling engine generators.

  Furthermore, in the combustion exhaust gas under pressure, the convective heat transfer is enhanced, and the radiation effect is also enhanced. As a result, the heat exchange efficiency of the heater unit in the Stirling engine generator is also enhanced, so the heater unit can be miniaturized. it can. Therefore, the above-described configuration of the present invention is as described in Patent Document 1 in which the combustion exhaust gas discharged from the dust collector is supplied to a supercharger that pressurizes the flow air, and thus the combustion exhaust gas itself is also pressurized. It is particularly effective when applied to pressurized fluidized bed furnace equipment.

  As described above, according to the present invention, heat can be recovered from the combustion exhaust gas stably and efficiently over a long period of time without increasing the size and complexity of the equipment and increasing the cost.

FIG. 1 is a schematic view of a fluidized bed incinerator showing an embodiment of the present invention. It is the (a) top view of the exhaust gas duct in the embodiment shown in Drawing 1, and the (b) side view. (A) The plane sectional view of the discharge chamber in the embodiment shown in Drawing 1 (however, the penetration hole of a partition is omitted in illustration), (b) It is a side view.

  1 to 3 show one embodiment of the fluidized bed incineration system of the present invention. The disclosed technology is not limited to the following embodiments, and various modifications can be made without departing from the scope of the present invention. In FIG. 1, reference numeral 1 denotes a pressurized fluidized bed incinerator which burns while moving an object to be treated, and a fluidized medium is filled in the fluidized bed incinerator 1. Material to be treated such as sewage sludge, human waste sludge, food waste, food waste, municipal waste, etc. supplied to the inside is made to flow with the fluid medium by the high temperature, high pressure fluid air A supplied from the hearth section. It is heated and burned. In the fluidized bed incinerator 1, a state of the combustion temperature, exhaust gas temperature, pressure, etc. in the furnace, which is not shown, is measured, and a thermometer or the like is output to the control means of the incinerator which is not shown. An instrumentation device such as a pressure gauge is provided.

  High-temperature flue gas B at a temperature of usually 800 ° C. or higher (for example, 850 ° C.) generated by burning the material to be treated in the fluidized bed incinerator 1 is supplied to, for example, a shell-and-tube air preheater 2 to obtain fluidized bed By heat exchange with the fluidizing air A supplied to the incinerator 1, the fluidizing air A is heated and heated to, for example, about 650.degree. Subsequently, the combustion exhaust gas B which has heated the fluidizing air A in the air preheater 2 to about 450 ° C. to 600 ° C. is supplied to the dust collector 3 described later, and the combustion exhaust gas B is supplied by the filter 3A of the dust collector. Dust such as contained dust is removed. The flue gas duct connecting the flue gas outlet of the fluidized bed incinerator 1 and the air preheater 2 is provided with a thermometer (not shown) for measuring the flue gas temperature and outputting it to the control means.

  Furthermore, the combustion exhaust gas B cleaned in the dust collector 3 is supplied to the supercharger 5 via the discharge pipe 4. The supercharger 5 includes a turbine that is supplied with the cleaned flue gas B and is rotated at high speed, and a compressor that is coaxially connected to the turbine and generates high-pressure compressed air by integrally rotating at high speed. It is a well-known, so-called turbocharger equipped. The atmosphere C is drawn into the compressor of the supercharger 5 through a filter or the like and supplied, and the compressed air generated in the compressor is supplied to the air preheater 2 as the flow air A, as described above. After being heat-exchanged with the flue gas B, it is supplied to the fluidized bed incinerator 1. The exhaust pipe 4 is provided with a thermometer (not shown) which measures the temperature of the flue gas supplied to the turbocharger 5 and outputs the temperature to the control means in the vicinity of the connection portion with the turbocharger 5.

  In this way, after the flue gas B which generated compressed air in the supercharger 5 is supplied to the white smoke prevention heat exchanger 6 and heat-exchanged with the white smoke prevention air D, the flue gas treatment tower 7 By spraying the caustic soda water and water, impurities and the like are removed and the cooling process is performed. Furthermore, the cooled flue gas B is supplied to the chimney 8 and mixed with the white smoke preventing air D heat-exchanged by the white smoke preventing heat exchanger 6 to be heated, thereby preventing the generation of white smoke. It is discharged to the outside.

  Then, in the present embodiment, firstly, the exhaust gas duct 9 is connected in series to the exhaust pipe 4 which is a discharge path of the combustion exhaust gas B for supplying the turbocharger 5 with the combustion exhaust gas B removed by the filter 3A in the dust collector 3 The exhaust gas duct 9 is provided with a Stirling engine generator 10 attached thereto. The exhaust gas duct 9 is attached in the middle of the exhaust pipe 4 when the pipe diameter of the exhaust pipe 4 is smaller than the length of the heater portion 10A of the Stirling engine generator 10 or when the pressure loss becomes too large. The central portion is formed in a cylindrical shape having a larger diameter than the discharge pipe 4, and both end portions are formed in a tapered truncated cone shape and connected to the discharge pipe 4 in an airtight manner.

  Further, in the Stirling engine generator 10, for example, the displacer piston and the power piston connected to the crankshaft as described above are accommodated in a cylinder, and one end of this cylinder is used as the heater unit (heating unit) 10A. At the same time, the other end is a cooling unit 10B supplied with cooling water to be cooled, and a generator 10D is connected to a case 10C in which a crankshaft is housed. The Stirling engine generator 10 according to the present embodiment has the heater 10A penetrated from the outside to the inside of the exhaust gas duct 9, and the cooling unit 10B, the case 10C, and the generator 10D are located outside the exhaust gas duct 9. It is airtightly attached to the exhaust gas duct 9.

  Furthermore, in the present embodiment, a plurality of (for example, four as shown in FIG. 2) Stirling engine generators 10 have intervals in the ventilation direction F of the combustion exhaust gas B in the exhaust gas duct 9 as shown in FIG. It is open and attached. Among these, the Stirling engine generators 10 adjacent to each other in the ventilation direction F of the combustion exhaust gas B are attached at different positions in the circumferential direction of the exhaust gas duct 9.

  Specifically, as shown in FIG. 2, the plurality of Stirling engine generators 10 according to the present embodiment are disposed at equal intervals in the ventilation direction F, and adjacent ones in the ventilation direction F are exhaust gas ducts 9. The positions are also shifted at equal intervals in the circumferential direction of. In addition, these Stirling engine generators 10 are arranged so as to move around the exhaust gas duct 9 while shifting their positions in one circumferential direction (clockwise direction as viewed from the ventilation direction F side in this embodiment) in the ventilation direction F. It is arranged, i.e. arranged in a spiral. The Stirling engine generator 10 is preferably installed closer to the dust collector 3 than the thermometer (not shown) provided near the connection portion of the discharge pipe 4 with the turbocharger 5.

  Here, it is assumed that the exhaust gas temperature of the combustion exhaust gas B becomes high due to the fluctuation of the property etc. of the processing object supplied. In this case, the number of operating Stirling engine generators 10 is determined within a range where the inlet temperature of the turbocharger 5 can maintain a preset temperature. Specifically, the Stirling engine generator 10 is controlled based on the measurement result of the thermometer (not shown) provided in the vicinity of the connecting portion with the turbocharger 5 by controlling the operation of the Stirling engine generator 10 by the control means. Determine the machine 10. More specifically, among the plurality of Stirling engine generators 10, one Stirling engine generator 10 closest to the dust collector 3 is started first, and thereafter, when the inlet temperature of the turbocharger 5 is equal to or higher than the set temperature The remaining Stirling engine generator 10 is sequentially activated from the side of the dust collector 3 toward the ventilation direction F.

  Further, in the present embodiment, the dust collector 3 is a bag filter, and the inflow chamber 3B into which the combustion exhaust gas B discharged from the air preheater 2 flows is provided at the lower portion, and the combustion exhaust gas removed by the filter 3A at the upper portion A container 3D having a circular cross section provided with a discharge chamber 3C from which B is discharged, and a substantially horizontal partition wall 3E separating the inflow chamber 3B and the discharge chamber 3C of the container 3D A through hole is formed.

  Furthermore, the filter 3A is, for example, a ceramic filter formed in a bottomed cylindrical shape with a U-shaped cross section, and its upper end opening is joined to the through hole of the partition 3E so that the inside communicates with the discharge chamber 3C. The combustion exhaust gas B is suspended from the partition wall 3E into the inflow chamber 3B, and when the combustion exhaust gas B passes through this filter having fine pores, dust such as dust in the combustion exhaust gas B is collected and removed. Thus, the flue gas B is purified.

  In the present embodiment, secondly, also in the dust collector 3, the Stirling engine generator 10 is attached to the discharge chamber 3C, which is a discharge path of the combustion exhaust gas B after dust removal by the filter 3A. . Here, the Stirling engine generator 10 of the dust collector 3 also penetrates the heater 10A of the dust collector 3 from the outside to the inside of the container 3D in the discharge chamber 3C, while the cooling unit 10B, the case 10C, and the generator 10D are of the container 3D. It is airtightly attached to this container 3D, being located outside.

  Also in the dust collector 3, a plurality of Stirling engine generators 10 are attached. However, the plurality of Stirling engine generators 10 in the dust collectors 3 are attached to the inner wall surface of the discharge chamber 3C at intervals in the circumferential direction at substantially equal positions in the vertical direction. Furthermore, between the Stirling engine generators 10 adjacent in the circumferential direction, a flow straightening vane 3F extending in the vertical direction is provided so as to protrude from the inner wall surface. In the present embodiment, the plurality of Stirling engine generators 10 and the straightening vanes 3F are arranged substantially alternately at equal intervals in the circumferential direction, provided that the straightening vanes are disposed at the exhaust port 3G of the combustion exhaust gas B from the discharge chamber 3C. 3F is not provided.

  Such a Stirling engine generator 10 has a short start-up time until the crankshaft stops rotating and starts from a stopped state, and the larger the temperature difference between the heater unit 10A and the cooling unit 10B, the larger the power consumption. Occur. Therefore, by attaching such a Stirling engine generator 10 to the discharge path of the combustion exhaust gas B having a high temperature of 450 ° C. or more as described above, according to the fluidized bed incineration facility of the above configuration, the surplus of the combustion exhaust gas B Heat can be efficiently recovered as electric power.

  Further, the discharge chamber 3C of the flue gas B in the dust collector 3 and the discharge path of the flue gas B dust-removed by the filter 3A of the dust collector 3 are originally provided in such a fluidized bed incinerator, Since the Stirling engine generator 10 may be attached to such an exhaust path, the size, complexity and cost of the facility are not increased.

  Further, the Stirling engine generator 10 is attached to a discharge path of the relatively clean flue gas B in which dust such as dust is removed by the filter 3A of the dust collector 3. Therefore, even if the heater 10A of the Stirling engine generator 10 is directly exposed to the combustion exhaust gas B and heated as described above, for example, the Stirling engine power generation is performed in the discharge path between the fluidized bed incinerator 1 and the inflow chamber 3B of the dust collector 3. As in the case where the machine 10 is attached, the amount of power generation does not decrease due to the adhesion of dust and the like in the combustion exhaust gas B before dust removal.

  For this reason, according to the fluidized bed incinerator of the above configuration, high power generation efficiency can be stably obtained over a long period of time. In addition, since the dust combustion exhaust gas B is also reduced in corrosiveness, it is possible to select a cheaper one as the material of the heater portion 10A etc. of the Stirling engine generator 10, thereby further reducing the cost. Can be

  Further, in the present embodiment, first, the Stirling engine generator 10 is disposed in the exhaust gas duct 9 through which the combustion exhaust gas B discharged from the dust collector 3 passes as a discharge path of the combustion exhaust gas B removed by the filter 3A of the dust collector 3. It is attached. Therefore, as described above, it is relatively easy to attach the Stirling engine generator 10 so that the heater 10A penetrates the exhaust gas duct 9, and efficient and economical heat recovery can be performed.

  Furthermore, in the present embodiment, a plurality of Stirling engine generators 10 are attached at intervals in the ventilation direction F of the combustion exhaust gas B in the exhaust gas duct 9, and when the internal diameter of the exhaust gas duct 9 is small Even when the heater unit 10A of the machine 10 is penetrated and attached, it is possible to prevent the heater units 10A of the Stirling engine generator 10 adjacent in the ventilation direction F from interfering with each other. Moreover, by adjusting the number of Stirling engine generators 10 to be started according to the temperature of the combustion exhaust gas B, it is possible to cope with the change easily in the exhaust gas temperature easily and finely.

  Therefore, as shown in FIG. 2A, particularly, even when the heater portion 10A penetrates so as to project beyond the center of the exhaust gas duct 9, the plurality of Stirling engine generators 10 can be obtained without interference. It can be disposed to ensure reliable heat recovery. Further, it is possible to prevent the stable flow of the combustion exhaust gas B in the exhaust gas duct 9 from being disturbed as in the case where the heater portion 10A protrudes to the same position in the ventilation direction F. Furthermore, heat recovery from the flow air A at a higher temperature is achieved by controlling the Stirling engine generator 10 spaced in the air flow direction F to start from the Stirling engine generator 10 closest to the dust collector 3 in this way. It is efficient because it can. In addition, the combustion exhaust gas supplied to the already-started Stirling engine generator 10 when the Stirling engine generator 10 is additionally started by sequentially starting from the Stirling engine generator 10 located closest to the dust collector 3 Since the amount of heat of B does not fluctuate, stable power generation can be performed.

  Further, in the present embodiment, the Stirling engine generators 10 adjacent to each other in the ventilation direction F are attached together with the plurality of Stirling engine generators 10 thus attached at intervals in the ventilation direction F of the combustion exhaust gas B. However, they are also mounted at different positions in the circumferential direction of the exhaust gas duct 9. Therefore, the heater unit 10A of the Stirling engine generator 10 on the near side (the dust collector 3 side) of the ventilation direction F burns the heater unit 10A of the Stirling engine generator 10 adjacent to the ventilation direction F side (supercharger 51 side). A situation in which heating by the exhaust gas B is prevented can be prevented, and more reliable heat recovery can be achieved, and the flow of the combustion exhaust gas B in the exhaust gas duct 9 can be further stabilized.

  In particular, in the present embodiment, as described above, the Stirling engine generator 10 is spirally disposed in the exhaust gas duct 9, and until the spiral makes a round, the Stirling engine generator 10 on the ventilation direction F side is The heater portion 10A of the next Stirling engine generator 10 does not protrude in the opposite direction to the ventilation direction F. For this reason, on at least the other end side of the cylinder of the Stirling engine generator 10, the heater unit 10A can be exposed to the high temperature combustion exhaust gas B, and heat can be recovered more efficiently.

  In the present embodiment, an exhaust gas duct 9 having a diameter larger than that of the exhaust pipe 4 is connected in the middle of the exhaust pipe 4 for discharging the combustion exhaust gas B from the dust collector 3 to the turbocharger 5 to connect a plurality of Stirling engine generators Although 10 is attached, if exhaust pipe 4 has a sufficiently large diameter, a plurality of Stirling engine generators 10 are attached by using exhaust pipe 4 itself as an exhaust gas duct without connecting such exhaust gas duct 9 separately. May be

Furthermore, although the exhaust gas duct 9 extends in the vertical direction in FIGS. 1 and 2, a plurality of Stirling engine generators 10 may be attached to the horizontally extending exhaust gas duct 9. Further, in addition to or instead of attaching the Stirling engine generator 10 between the dust collector 3 and the turbocharger 5, the space between the turbocharger 5 and the white smoke prevention heat exchanger 6, or the white smoke prevention heat A Stirling engine generator 10 may be attached between the exchanger 6 and the flue gas treatment tower 7.

  Further, in the present embodiment, the plurality of Stirling engine generators 10 are controlled by the control means based on the inlet temperature of the supercharger 5 and sequentially started from the side of the dust collector 3. A control may be performed to simultaneously activate a plurality of units when it becomes an emergency. Furthermore, the starting condition of the Stirling engine generator 10 is not limited to the inlet temperature of the turbocharger 5, the furnace temperature of the fluidized bed incinerator 1, the flue gas temperature at the air preheater 2 outlet, the dust collector 3 inlet, the dust collector 3 outlet The combustion exhaust gas temperature or the like may be adopted.

  On the other hand, in the present embodiment, in the container 3D of the dust collector 3 in which the Stirling engine generator 10 as described above includes the filter 3A that removes the flue gas B, the discharge chamber 3C in which the dusted flue gas B is discharged. It is also attached. For this reason, since power generation can be performed and heat recovery can be performed by the flue gas B which becomes the highest temperature after dust removal, it is more efficient.

  In addition, a plurality of Stirling engine generators 10 are attached to the inner wall surface of the discharge chamber 3C at intervals in the circumferential direction also in the dust collector 3, and are discharged from the filter 3A through the through holes of the partition 3E. The combustion exhaust gas B enables efficient heat recovery. Furthermore, a straightening vane 3F extending in the vertical direction is provided between the Stirling engine generators 10 adjacent to each other in the circumferential direction, and the combustion exhaust gas B discharged to the discharge chamber 3C from the through hole of the partition 3E is reliably made. Flows can be arranged to strike individual Stirling engine generators 10 to promote efficient heating. Moreover, since the straightening vanes 3F are provided on the inner wall surface of the discharge chamber 3C, they do not interfere with the partition 3E that suspends the filter 3A.

  In the case of the combustion exhaust gas B under pressure, the convective heat transfer is enhanced, and the radiation effect is also enhanced. As a result, the heat exchange efficiency of the heater portion 10A in the Stirling engine generator 10 is also enhanced. Miniaturization can be achieved. Accordingly, in the fluidized bed incineration facility configured as described above, the flue gas B discharged from the dust collector 3 is supplied to the turbocharger 5 so that the fluidizing air A is pressurized and supplied to the fluidized bed incinerator 1. It is particularly effective to apply to a pressurized fluidizing furnace facility such as the present embodiment in which the combustion exhaust gas B itself discharged from the fluidized bed incinerator 1 is pressurized accordingly. Further, in the present embodiment, the Stirling engine generator 10 is attached to both the discharge chamber 3C of the dust collector 3 and the discharge path of the combustion exhaust gas B from the dust collector 3, but even if attached to only one of them. Good.

1 fluid bed incinerator 2 air preheater 3 dust collector 3A filter 3B inflow chamber 3C discharge chamber 3D container 3E partition wall 3F straightening vane 3G discharge port 4 exhaust pipe of combustion exhaust gas 5 supercharger 6 white smoke prevention heat exchanger 7 exhaust smoke Processing tower 8 chimney 9 exhaust gas duct 10 Stirling engine generator 10A heater unit 10B cooling unit 10C case 10D generator A flow air B combustion exhaust gas C air D white smoke prevention air F air flow direction

Claims (4)

A fluidized bed incinerator which burns an object to be treated by flowing air while flowing, and a dust collector which removes the flue gas discharged from the fluidized bed incinerator with a filter, and the flue gas which has been subjected to dust removal by the filter In the discharge path to be discharged, a plurality of Stirling engine generators are attached to an exhaust gas duct through which the combustion exhaust gas discharged from the dust collector passes .
The plurality of Stirling engine generators are spaced apart in the ventilation direction of the combustion exhaust gas in the exhaust gas duct, and the Stirling engine generators adjacent to each other in the ventilation direction of the combustion exhaust gas are different in the circumferential direction of the exhaust gas duct A fluidized bed incinerator characterized in that it is helically arranged and mounted so as to be in position . Claims, characterized in that said plurality of Stirling engine generator, and a control means for activating the most the dust collector side successively the Stirling engine generator toward the vent direction from the Stirling engine generator located Fluidized bed incinerator according to 1 . A fluidized bed incinerator which burns an object to be treated by flowing air while flowing, and a dust collector which removes the flue gas discharged from the fluidized bed incinerator with a filter, and the flue gas which has been subjected to dust removal by the filter A number of Stirling engine generators are attached to the discharge path that discharges,
The dust collector is provided at the lower portion thereof with an inflow chamber into which the combustion exhaust gas flows, and at the upper portion is a container provided with a discharge chamber which is the discharge passage from which the dust is discharged. A partition separating the discharge chamber and the discharge chamber, and the filter suspended by the partition and the inside of which communicates with the discharge chamber;
The plurality of Stirling engine generators are mounted on the inner wall surface of the discharge chamber at intervals in the circumferential direction, and flow straightening plates extending in the vertical direction between the Stirling engine generators adjacent in the circumferential direction A fluidized bed incinerator characterized in that the above inner wall surface is provided . The fluidized bed incinerator according to any one of claims 1 to 3 , wherein the combustion exhaust gas discharged from the dust collector is supplied to a supercharger that pressurizes the fluidizing air. .

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