CN211260761U - Chicken manure boiler flue structure - Google Patents

Abstract

The utility model provides a chicken manure boiler flue structure, set up the tobacco pipe between vapour cold cyclone and chimney including the intercommunication, vapour cold cyclone sets up with the exhaust port intercommunication of boiler, has set gradually 10 at least heat transfer device along the circulation direction of flue gas in the tobacco pipe, two last heat transfer device all correspond separately and are equipped with a cold junction air compensator, and every cold junction air compensator's entry all communicates with external natural air intercommunication, cold junction air compensator's export and the heat transfer device's that corresponds cold medium entry intercommunication. The utility model discloses a flue structure can effectively reduce the deposition of flue bottom heat transfer device heating surface, strengthens the boiler heat exchange, improves boiler thermal efficiency.

Description

Chicken manure boiler flue structure

Technical Field

The utility model belongs to chicken manure boiler power generation equipment field, especially a chicken manure boiler flue structure.

Background

In recent years, the chicken manure boiler power generation technology is developed along with the development of domestic breeding industry, particularly white feather broiler breeding industry. White-feather chickens are usually bred on breeding beds formed by paving biomass padding materials such as rice husks, so that a large amount of wastes such as chicken manure and the rice husks are generated in the breeding process, the environment is influenced, and great resource waste is caused. Therefore, aiming at the characteristics that the heat value of the chicken manure and the rice hull, the dried sludge of the breeding and slaughtering sewage and the like is 1200-1800 Cal/g, the chicken manure boiler which takes the chicken manure and the rice hull as main fuels is designed and produced in the prior art. The flue structure of the existing chicken manure boiler is as follows: comprises a chimney which is vertically arranged, the upper end of the chimney is communicated with a flue gas outlet pipeline of the chicken manure boiler, the lower end of the chimney is communicated with a chimney pipeline, the chimney is of a linear structure, and 10 heat exchange devices including a high-temperature economizer, a high-temperature superheater, a low-temperature superheater, a medium-high temperature economizer, a medium-low temperature economizer, a low-temperature economizer, a high-temperature primary air preheater, a medium-temperature primary air preheater, a low-temperature primary air preheater and a secondary air preheater are sequentially arranged in the chimney from top to bottom, the cold media of the primary air pre-heaters and the secondary air pre-heaters are all outside natural air, meanwhile, the cold medium between the high-temperature superheater and the low-temperature superheater is arranged in series, the source of the cold medium of the low-temperature superheater is superheated steam at 320-340 ℃, the cold medium between the four coal economizers is arranged in series, and the source of the cold medium of the low-temperature coal economizer is condensed water at about 140-160 ℃. When the boiler works, smoke coming out of the chicken manure boiler is filtered by the steam-cooled cyclone separator and then enters the chimney (the temperature of the smoke entering the chimney is about 750 ℃), and after heat exchange is sequentially carried out between the smoke and each heat exchange device in the chimney from top to bottom, the smoke is dedusted by the deduster from the lower end part of the chimney and then enters the chimney through the induced draft fan and is discharged to the external environment. However, the existing chicken manure boiler flue has the following defects: the soot deposition phenomenon often occurs on the heating surface of the heat exchanger (the tertiary primary air pre-heater and the secondary air pre-heater) at the lower part of the chimney, the more the operation time of the boiler flue structure is long, the more serious the soot deposition is, particularly after the boiler operates for 15-20 days, the heat exchange efficiency of the boiler flue structure is obviously reduced, the exhaust gas temperature is increased, and the economy and the safety are affected; in addition, in the operation process of the boiler flue structure, the heating surfaces of the high-temperature superheater and the low-temperature superheater can generate different degrees of dust deposition.

Disclosure of Invention

The utility model aims at providing a chicken manure boiler flue structure, this flue structure can effectively reduce the deposition of flue bottom heat transfer device heated surface, strengthens the boiler heat exchange, improves the boiler thermal efficiency.

The utility model provides a chicken manure boiler flue structure, sets up the tobacco pipe between vapour cold cyclone and chimney including the intercommunication, the exhaust port intercommunication setting of vapour cold cyclone and boiler has set gradually 10 at least heat transfer device along the circulation direction of flue gas in the tobacco pipe, two last heat transfer device all correspond separately and are equipped with a cold junction air compensator, and every cold junction air compensator's entry all communicates with external natural air intercommunication, cold junction air compensator's export and the heat transfer device's that corresponds cold medium entry intercommunication.

When the smoke-cooling cyclone separator works, smoke discharged from a boiler is separated by the steam-cooling cyclone separator to remove solids, enters the smoke tube, exchanges heat with each heat exchange device in sequence in the smoke tube, and is finally discharged from a chimney.

The utility model discloses a cold medium of last two heat transfer device is the warm air that forms behind cold junction air compensator of external natural air, compares with external natural air, and two last heat transfer device's cold medium temperature all promotes for two last heat transfer device's the inside and outside difference in temperature diminishes, avoids the flue gas when two last heat transfer device, meets condensation and produces deposition on two last heat transfer device's heat-transfer surfaces, influences heat transfer device's heat exchange efficiency.

Preferably, the smoke tube is of a vertical serpentine structure, so that the residence time of smoke in the smoke tube is prolonged to a certain extent, the temperature of the smoke at the last two heat exchange devices in the smoke tube is reduced, and the dust deposition generated on the heat exchange surfaces of the last two heat exchange devices is further reduced.

Preferably, at least one groove is arranged on the bottom wall of all the turning positions at the bottom of the smoke tube at intervals in parallel, a smoke dust particle conveyor is uniformly distributed in each groove, an ash deposition discharge pipe is arranged at the bottom of the smoke dust particle conveyor and penetrates through the wall of the smoke tube to extend out of the smoke tube, and a valve is arranged at the outlet of the ash deposition discharge pipe. When more dust is deposited at the bottom of the smoke tube and the dust needs to be discharged, the valve is opened, and the smoke dust particle conveyor is started; and after the ash accumulation is finished, closing the valve and closing the smoke dust particle conveyor. The utility model can clean the deposited dust at the bottom of the smoke tube in time through the smoke dust particle conveyor, and can avoid the deposited dust from transferring part of the deposited dust to the heated surface of the heat exchange device near the bottom of the smoke tube to influence the heat exchange efficiency of the heat exchange device while improving the heat exchange efficiency at the bent part of the bottom of the smoke tube; in addition, the dust deposition discharge pipe is only opened when the dust deposition is discharged, and is closed at other times, so that the smoke is prevented from being directly discharged from the dust deposition discharge pipe.

Preferably, the smoke dust particle conveyor comprises a shell with a U-shaped section, a spiral feeding auger embedded in the shell and a transmission rod fixedly connected with any one end of the spiral feeding auger, the central axis of the transmission rod is coincided with the central axis of the spiral feeding auger, and the transmission rod is driven to rotate by an auger driving device positioned outside the smoke pipe. The utility model discloses a spiral pay-off auger is connected with auger drive transmission through the transfer line that is located its one end, does not have the center pin, consequently, when plugs such as stereoplasm deposition deposit appear in smoke and dust granule conveyer casing inside bottom part is local, the auger can take place deformation when spiral pay-off auger rotates to here and bumps with this plug, upwards plays slightly, skips this plug, avoids causing the damage of spiral pay-off auger.

Furthermore, correspond respectively on casing and the flue pipe wall and seted up and to supply the dredging tool freely to insert the mediation hole in the casing, the during operation, the dredging tool passes in proper order from the extroversion to the inside mediation hole and dredges the hole and insert in the casing and push away the plug in the casing to deposition delivery pipe department, does benefit to in time the plug in the casing of mediation.

Furthermore, the middle part and the tail part of the shell are respectively provided with a dust deposition discharge pipe.

Preferably, the heat medium of the cold end air compensator is condensed water which is obtained after power generation of the boiler and has the temperature of 120-150 ℃, so that the heat of the condensed water obtained after the power generation of the boiler is recycled, and the utilization rate of the heat of the boiler is improved.

Preferably, cold junction air compensator includes the box structure, and the box seals the setting all around, and goes up the top surface and open with bottom surface down, the last top surface of box structure is air inlet, bottom surface down and is the air outlet, has arranged several snakelike heat exchange tubes side by side in the box structure, and the equal vertical setting of every heat exchange tube, the upper end of every heat exchange tube is heat medium entry, the lower extreme is the heat medium export, the utility model discloses a cold junction air compensator simple structure, it is practical. Furthermore, adjacent heat exchange tubes are arranged in a staggered mode, and the heat exchange efficiency is higher. In the specific implementation process, the upper part of the box body structure is provided with a heat medium inlet collection box communicated with the heat medium inlets of all the heat exchange tubes, the lower part of the box body structure is provided with a heat medium outlet collection box communicated with the heat medium outlets of all the heat exchange tubes, the heat medium inlet collection box is provided with a heat medium main inlet, and the heat medium outlet collection box is provided with a heat medium main outlet.

Furthermore, the heat exchange tube with the fins on the outer side is preferably adopted, so that the heat exchange area is increased, and the heat exchange efficiency is improved.

Preferably, a high-temperature superheater, a low-temperature superheater, a high-temperature economizer, a medium-low-temperature economizer, a high-temperature primary air preheater, a medium-temperature primary air preheater, a low-temperature primary air preheater and a low-temperature secondary air preheater are arranged in the smoke tube, cold media between the high-temperature superheater and the low-temperature superheater are arranged in series, the source of the cold media of the low-temperature superheater is superheated steam at about 320-340 ℃, the cold media between the three primary air preheaters are arranged in series, the cold media of the primary air preheaters and the cold media of the secondary air preheaters are warm air formed by passing outside natural air through a cold end air compensator, meanwhile, the cold media between the four economizers are arranged in series, and the source of the cold media of the low-temperature economizer is condensed water at 140-160 ℃; the high-temperature primary air pre-heater is arranged between the high-temperature economizer and the medium-high temperature economizer. An air preheater provides "wind for the boiler, sets up in low temperature economizer rear for prior art's high temperature air preheater, the utility model discloses a wind temperature that high temperature air preheater (35) came out is higher, and the heat utilization efficiency of boiler is higher.

Further, the high-temperature economizer is arranged between the low-temperature superheater and the high-temperature primary air preheater. The structure can avoid the phenomenon of dust accumulation on the heating surface of the high-temperature primary air preheater as much as possible.

Furthermore, a middle-temperature secondary air pre-heater is further arranged behind the smoke flowing direction of the low-temperature secondary air pre-heater, and cold media of the two secondary air pre-heaters are connected in series. Overgrate air preheater provides "overgrate air" for the boiler, only sets up one-level overgrate air preheater among the prior art, the utility model discloses increased one-level overgrate air preheater (be middle temperature overgrate air preheater), the temperature of overgrate air is higher, and the heat utilization efficiency of boiler is higher. Furthermore, because the total number of heat exchangers in the flue is large, in order to facilitate laying of a connecting pipeline, the medium-temperature primary air pre-heater and the low-temperature primary air pre-heater are respectively located in two adjacent vertical flue unit pipes, the medium-temperature primary air pre-heater and the low-temperature primary air pre-heater are located at the same horizontal height position, the medium-temperature secondary air pre-heater and the low-temperature secondary air pre-heater are also respectively located in the two adjacent vertical flue unit pipes, the medium-temperature secondary air pre-heater and the low-temperature secondary air pre-heater are located at the same horizontal height position, the medium-low-temperature economizer and the low-temperature economizer are respectively located in the two adjacent vertical flue unit pipes, and the medium-low-temperature economizer and the low-temperature economizer are located at the same horizontal height position.

Further, an evaporator is arranged behind the flue gas flowing direction of the high-temperature superheater, and the source of a cooling medium of the evaporator is 230-250 ℃ saturated steam in a boiler drum. This application shifts to the flue gas circulation direction's of low temperature over heater the place ahead with high temperature economizer in, add at the flue gas circulation direction's of high temperature over heater rear and establish the evaporimeter, the cold medium of this evaporimeter is the saturated steam of temperature 230 ~ 250 ℃, avoids high temperature over heater and low temperature over heater's heating surface to appear the deposition phenomenon.

Drawings

FIG. 1 is a simplified diagram of the structure of the chicken manure boiler flue, wherein the arrow head

The indicated direction is the circulation direction of the smoke; arrow head

The indicated direction is the circulation direction of the primary wind; arrow head

The indicated direction is the circulation direction of the secondary air;

FIG. 2 is a perspective view of the assembled smoke particulate conveyor of the present invention, wherein the flue is a partial cross-sectional view;

FIG. 3 is a structural diagram of the housing of the soot particle conveyor of the present invention;

fig. 4 is a three-dimensional structure view of the cold-end air compensator of the present invention in a state where the front panels of the heat medium inlet header and the heat medium outlet header are removed;

fig. 5 is a structural diagram of the cold end air compensator of the present invention in a state where one of the side plates is removed;

fig. 6 is a partial structure view of the heat exchange tube of the cold end air compensator of the present invention.

Detailed Description

The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

as shown in fig. 1, a chicken manure boiler flue structure includes a flue tube 30 disposed between a steam-cooled cyclone separator 10 and a chimney 20 in a communicating manner, the steam-cooled cyclone separator 10 is disposed in a communicating manner with a smoke outlet of a boiler 100, at least 10 heat exchange devices (31-42) are sequentially disposed in the flue tube 30 along a flow direction of smoke, two last heat exchange devices (41, 42) are respectively provided with a cold-end air compensator (50a, 50b) in a corresponding manner, an inlet of each cold-end air compensator (50a, 50b) is communicated with external natural air, and an outlet of each cold-end air compensator (50a, 50b) is communicated with a cold medium inlet of the corresponding heat exchange device (41, 42).

When the boiler 100 works, the flue gas discharged from the boiler 100 is separated by the steam-cooled cyclone separator 10 to remove solids, then enters the flue pipe 30, exchanges heat with the heat exchange devices (31-42) in sequence in the flue pipe 30, and finally is discharged from the chimney 20.

The utility model discloses a cold medium of last two heat transfer device (41, 42) is the warm air that external natural air formed behind cold junction air compensator (50a, 50b), compare with external natural air, the cold medium temperature of last two heat transfer device (41, 42) all promotes, make the inside and outside difference in temperature of last two heat transfer device (41, 42) diminish, avoid the flue gas when last two heat transfer device (41, 42), meet the condensation knot and produce deposition on the heat-transfer face of last two heat transfer device (41, 42), influence the heat exchange efficiency of heat transfer device (41, 42).

Preferably, the smoke tube 30 is a vertical serpentine structure, which prolongs the residence time of the smoke in the smoke tube 30 to a certain extent, so that the temperature of the smoke at the last two heat exchange devices (41, 42) in the smoke tube 30 is reduced, and the dust deposition on the heat exchange surfaces of the last two heat exchange devices (41, 42) is further reduced.

Preferably, referring to fig. 1 to fig. 3, at least one groove 43 is arranged on the bottom wall of all the bends at the bottom of the smoke tube 30 at intervals in parallel, a smoke particle conveyor 60 is arranged in each groove 43, an ash deposition discharge pipe 61 is arranged at the bottom of the smoke particle conveyor 60, the ash deposition discharge pipe 61 penetrates through the wall of the smoke tube 30 and extends out of the smoke tube 30, and a valve 610 is arranged at the outlet of the ash deposition discharge pipe 61. When more dust is deposited at the bottom of the smoke tube 30 and the dust needs to be discharged, the valve 610 is opened, and the smoke dust particle conveyor 60 is started; after the ash deposition is completed, the valve 610 is closed and the soot particle conveyor 60 is closed. The utility model can timely clean the deposited dust at the bottom of the smoke tube 30 through the smoke dust particle conveyor 60, and can prevent the deposited dust from flying to transfer part of the deposited dust to the heating surface of the heat exchange device near the bottom of the smoke tube 30 to influence the heat exchange efficiency of the heat exchange device while improving the heat exchange efficiency at the bent part at the bottom of the smoke tube 30; in addition, the dust-deposition discharge pipe 61 is opened only when the dust is discharged and is closed at other times, so that the direct discharge of the flue gas from the dust-deposition discharge pipe 61 is avoided.

Preferably, as shown in fig. 2, the smoke dust particle conveyor 60 includes a housing 62 with a U-shaped cross section, a spiral feeding auger 63 embedded in the housing 62, and a transmission rod 64 fixedly connected to either end of the spiral feeding auger 63, wherein the central axis of the transmission rod 64 coincides with the central axis of the spiral feeding auger 63, and the transmission rod 64 is driven to rotate by an auger driving device 65 located outside the smoke tube 30. The utility model discloses a spiral pay-off auger 63 is connected through the transfer line 64 that is located its one end and auger drive arrangement 65 transmission, does not have the center pin, consequently, when plugs such as stereoplasm deposition deposit appear in smoke and dust granule conveyer casing internal bottom part is local, auger 63 can take place deformation when colliding with this plug when spiral pay-off auger 63 rotates to here, upwards plays slightly, skips this plug, avoids causing spiral pay-off auger 63's damage.

Further, referring to fig. 2 and fig. 3, the casing 62 and the smoke tube 30 are respectively and correspondingly provided with dredging holes (621, 301) for freely inserting the dredging tool into the casing 62, when in use, the dredging tool sequentially penetrates through the dredging holes 301 and the dredging holes 621 from outside to inside to be inserted into the casing 62, and pushes the blockage in the casing 62 to the dust-depositing discharge pipe 61, so as to facilitate timely dredging of the blockage in the casing 62.

Further, as shown in fig. 2, the middle and the tail of the housing 62 are respectively provided with dust-collecting discharge pipes 61.

Preferably, the heat medium of the cold-end air compensator (50a, 50b) is from the condensed water which is obtained after the boiler generates electricity and has the temperature of 120-150 ℃, so that the heat of the condensed water obtained after the boiler generates electricity is recycled, and the utilization rate of the heat of the boiler is improved.

Preferably, combine fig. 4 and 5, cold junction air compensator (50a, 50b) all includes box structure 51, and box 51 seals the setting all around, and goes up the top surface and open with bottom surface down, box structure 51's last top surface is air inlet, bottom surface is air outlet down, has arranged several snakelike heat exchange tubes 52 in the box structure 51 side by side, the equal vertical setting of every heat exchange tube 52, and the upper end of every heat exchange tube 52 is thermal medium entry 521, the lower extreme is thermal medium export 522, the utility model discloses a cold junction air compensator (50a, 50b) simple structure, it is practical. Further, as shown in fig. 4 and 5, the adjacent heat exchange tubes 52 are arranged in a staggered manner, so that the heat exchange efficiency is higher. In the specific implementation process, as shown in fig. 4 and 5, a heat medium inlet header tank 53 communicated with the heat medium inlets 521 of all the heat exchange tubes 52 is arranged at the upper part of the box structure 51, a heat medium outlet header tank 54 communicated with the heat medium outlets 522 of all the heat exchange tubes 52 is arranged at the lower part of the box structure, a heat medium total inlet 531 is arranged on the heat medium inlet header tank 53, and a heat medium total outlet 541 is arranged on the heat medium outlet header tank 54, so that the structural design is simple and reasonable.

Further, as shown in fig. 6, the heat exchange tube 52 preferably adopts a heat exchange tube with fins 523 on the outer side, so that the heat exchange area is increased, and the heat exchange efficiency is improved. Of course, the heat exchange tube 52 of the present invention may also be a heat exchange tube without the fins 523 on the outside.

Preferably, as shown in fig. 1, a high-temperature superheater 32, a low-temperature superheater 33, a high-temperature economizer 34, a medium-high-temperature economizer 36, a medium-low-temperature economizer 37, a low-temperature economizer 40, a high-temperature primary air preheater 35, a medium-temperature primary air preheater 39, a low-temperature primary air preheater 42 and a low-temperature secondary air preheater 41 are arranged in the smoke tube 30, the cold media between the high-temperature superheater 32 and the low-temperature superheater 33 are arranged in series, the cold media of the low-temperature superheater 33 are superheated steam with a temperature of about 320-340 ℃, the cold media between the three primary air preheaters (35, 39, 42) are arranged in series, the cold media of the primary air preheaters (35, 39, 42) and the cold media of the secondary air preheater 41 are warm air formed by natural air passing through cold-end air compensators (50a, 50b), and meanwhile, the four economizers (34, 36, 34, 36, 34, 37. 40), the cold media are arranged in series, and the source of the cold media of the low-temperature economizer 40 is condensed water at 140-160 ℃; the high-temperature primary air preheater 35 is arranged between the high-temperature economizer 34 and the medium-high temperature economizer 36. The air preheater 35 provides "air" for the boiler, sets up in low temperature economizer rear for the air preheater of high temperature air of prior art, the utility model discloses an air temperature that air preheater 35 came out is higher for high temperature air, and boiler 100's heat utilization efficiency is higher.

Further, as shown in fig. 1, the high-temperature economizer 34 is disposed between the low-temperature superheater 33 and the high-temperature primary air preheater 35. The structure can avoid the phenomenon of dust accumulation on the heating surface of the high-temperature primary air preheater 35 as much as possible.

Further, as shown in fig. 1, a middle-temperature secondary air pre-heater 38 is further disposed behind the low-temperature secondary air pre-heater 41 in the smoke flowing direction, and the cold mediums of the two secondary air pre-heaters (38, 41) are connected in series. Overgrate air preheater provides "overgrate air" for the boiler, only sets up one-level overgrate air preheater among the prior art, the utility model discloses increased one-level overgrate air preheater (be middle temperature overgrate air preheater), the temperature of overgrate air is higher, and the heat utilization efficiency of boiler is higher. Further, because the total number of the heat exchangers (31-42) in the flue is large, in order to facilitate laying of connecting pipelines, as shown in fig. 1, the medium-temperature primary air pre-heater 39 and the low-temperature primary air pre-heater 42 are respectively located in two adjacent vertical flue unit pipes, the medium-temperature primary air pre-heater 39 and the low-temperature primary air pre-heater 42 are located at the same horizontal height position, the medium-temperature secondary air pre-heater 38 and the low-temperature secondary air pre-heater 41 are also respectively located in two adjacent vertical flue unit pipes, the medium-temperature secondary air pre-heater 38 and the low-temperature secondary air pre-heater 41 are located at the same horizontal height position, the medium-low-temperature economizer 37 and the low-temperature economizer 40 are respectively located in two adjacent vertical flue unit pipes, and the medium-low-temperature economizer 37 and the low-temperature economizer 40 are located at the same horizontal height position.

Further, as shown in fig. 1, an evaporator 31 is arranged behind the high-temperature superheater 32 in the flue gas flowing direction, and a source of a cooling medium of the evaporator 31 is 230-250 ℃ saturated steam in a boiler drum. According to the application, the high-temperature economizer 34 is transferred to the front of the smoke flowing direction of the low-temperature superheater 33, the evaporator 31 is additionally arranged behind the smoke flowing direction of the high-temperature superheater 32, the temperature of a cold medium of the evaporator 31 is 230-250 ℃ saturated steam, and the phenomenon of dust deposition on the heating surfaces of the high-temperature superheater 32 and the low-temperature superheater 33 is avoided.

Claims (10)

1. The utility model provides a chicken manure boiler flue structure, sets up the tobacco pipe between vapour cooling cyclone and chimney including the intercommunication, vapour cooling cyclone sets up with the exhaust port intercommunication of boiler, has set gradually 10 at least heat transfer device, its characterized in that along the circulation direction of flue gas in the tobacco pipe: and the last two heat exchange devices are respectively and correspondingly provided with a cold end air compensator, the inlet of each cold end air compensator is communicated with the external natural air, and the outlet of each cold end air compensator is communicated with the cold medium inlet of the corresponding heat exchange device.

2. The chicken manure boiler flue structure of claim 1, which is characterized in that: the smoke tube is of a vertical snake-shaped structure; at least one groove is arranged on the bottom wall of all the turning positions at the bottom of the smoke tube at intervals in parallel, a smoke particle conveyor is uniformly arranged in each groove, an accumulated dust discharge pipe is arranged at the bottom of the smoke particle conveyor and penetrates through the wall of the smoke tube to extend out of the smoke tube, and a valve is arranged at the outlet of the accumulated dust discharge pipe.

3. The chicken manure boiler flue structure of claim 2, wherein: the smoke dust particle conveyor comprises a shell with a U-shaped section, a spiral feeding auger embedded in the shell and a transmission rod fixedly connected with any end of the spiral feeding auger, the central axis of the transmission rod coincides with the central axis of the spiral feeding auger, and the transmission rod is driven to rotate by an auger driving device positioned outside the smoke pipe.

4. The chicken manure boiler flue structure of claim 3, wherein: the shell and the flue pipe wall are respectively and correspondingly provided with dredging holes for freely inserting the dredging tool into the shell.

5. The chicken manure boiler flue structure of claim 3, wherein: the middle part and the tail part of the shell are respectively provided with a dust deposition discharge pipe.

6. The chicken manure boiler flue structure of claim 1, which is characterized in that: the cold end air compensator comprises a box body structure, the box body is sealed and arranged on the periphery, the upper top surface and the lower bottom surface of the box body structure are open, the upper top surface of the box body structure is an air inlet, the lower bottom surface of the box body structure is an air outlet, a plurality of snake-shaped heat exchange tubes are arranged in the box body structure in parallel, each heat exchange tube is vertically arranged, and the upper end of each heat exchange tube is a heat medium inlet while the lower end of the heat exchange tube is a heat.

7. The chicken manure boiler flue structure of claim 1, which is characterized in that: the smoke tube is internally provided with a high-temperature superheater, a low-temperature superheater, a high-temperature economizer, a medium-low-temperature economizer, a high-temperature primary air preheater, a medium-temperature primary air preheater, a low-temperature primary air preheater and a low-temperature secondary air preheater, cold media between the high-temperature superheater and the low-temperature superheater are arranged in series, the source of the cold media of the low-temperature superheater is superheated steam at about 320-340 ℃, the cold media between the three primary air preheaters are arranged in series, the cold media of the primary air preheater and the secondary air preheater are warm air formed by passing external natural air through a cold end air compensator, meanwhile, the cold media between the four economizers are arranged in series, and the source of the cold media of the low-temperature economizer is condensed water at 140-160 ℃; the high-temperature primary air pre-heater is arranged between the high-temperature economizer and the medium-high temperature economizer.

8. The chicken manure boiler flue structure of claim 7, wherein: the high-temperature economizer is arranged between the low-temperature superheater and the high-temperature primary air preheater; the rear of the smoke flowing direction of the low-temperature secondary air pre-heater is also provided with a medium-temperature secondary air pre-heater, and cold media of the two secondary air pre-heaters are connected in series.

9. The chicken manure boiler flue structure of claim 8, wherein: the medium-temperature primary air pre-heater and the low-temperature primary air pre-heater are respectively positioned in two adjacent vertical flue unit pipes, the medium-temperature primary air pre-heater and the low-temperature primary air pre-heater are positioned at the same horizontal height position, the medium-temperature secondary air pre-heater and the low-temperature secondary air pre-heater are also respectively positioned in two adjacent vertical flue unit pipes, the medium-temperature secondary air pre-heater and the low-temperature secondary air pre-heater are positioned at the same horizontal height position, the medium-low-temperature economizer and the low-temperature economizer are respectively positioned in two adjacent vertical flue unit pipes, and the medium-low-temperature economizer and the low-temperature economizer are positioned at the same horizontal height position.

10. The chicken manure boiler flue structure of claim 7, wherein: an evaporator is arranged behind the high-temperature superheater in the smoke flowing direction, and the source of a cold medium of the evaporator is 230-250 ℃ saturated steam in a boiler drum.

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