CN219551292U - Secondary heat energy recovery mechanism for thermal power generation - Google Patents
Secondary heat energy recovery mechanism for thermal power generation Download PDFInfo
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- CN219551292U CN219551292U CN202320605902.2U CN202320605902U CN219551292U CN 219551292 U CN219551292 U CN 219551292U CN 202320605902 U CN202320605902 U CN 202320605902U CN 219551292 U CN219551292 U CN 219551292U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a thermal power generation secondary heat energy recovery mechanism, which comprises a closed box body; the four sides of the closed box body are respectively provided with a large flange seat and a small flange seat; two adjacent large flange seats are respectively connected to the flue pipe through two large valve bodies, and the remaining two large flange seats are respectively connected to the outer smoke exhaust pipe through the large valve bodies; two adjacent small flange seats are connected to the high-pressure fan through two small valve bodies respectively, and the remaining two small flange seats are connected to the bag-type dust collector through the small valve bodies respectively; an inner mandrel piece for heat exchange and filtration is arranged at the inner side of the closed box body; according to the thermal power generation secondary heat energy recovery mechanism, the filtering and heat exchange are integrally arranged, the high-temperature gas is filtered, the flow speed is reduced, the heat exchange end rapidly absorbs heat and evaporates, and on-line periodic ash removal can be realized, so that the device can efficiently recover the secondary heat energy.
Description
Technical Field
The utility model particularly relates to a thermal power generation secondary heat energy recovery mechanism, and belongs to the technical field of thermal power generation waste heat utilization.
Background
The thermal power generation utilizes the heat energy generated by the combustible materials during combustion, and is converted into electric energy through a power generation device, the fuel is mainly utilized to generate heat and heat water to form high-temperature high-pressure superheated steam, and then the steam enters a steam turbine along a pipeline to continuously expand and do work, and the steam turbine rotor is impacted to rotate at high speed to drive a generator to generate electricity; when the existing thermal power generation is produced, high-temperature heat is carried in the flue gas discharged by combustion, the high-temperature exhaust is recycled only through an economizer, a large amount of heat still exists, if the direct discharge can cause a large amount of heat energy loss, in the prior art, the flue gas waste heat recycling mode is many, but the problem of ash accumulation and blockage of heat exchange equipment is usually solved, so that the heat exchange efficiency is very low in the later stage of use, time and labor are wasted when the ash is removed in the later stage of use, and the problem of low-tight sealing and smoke leakage is easily caused.
Disclosure of Invention
In order to solve the problems, the utility model provides a thermal power generation secondary heat energy recovery mechanism, which is characterized in that the filtering and heat exchange are integrally arranged, high-temperature gas is filtered and simultaneously is quickly absorbed in heat and vaporized by a heat exchange end by utilizing a slow flow rate, and the on-line periodic ash removal can be realized, so that the device can efficiently recover the secondary heat energy.
The utility model relates to a thermal power generation secondary heat energy recovery mechanism, which comprises
Closing the box body; the four sides of the closed box body are respectively provided with a large flange seat and a small flange seat; the closed box body is used as a support body of the heat exchange and filtration assembly, and when the inner core shaft piece is assembled, the heat insulation cotton is fully filled in the closed box body;
the inner core shaft piece is fixed on the inner side of the closed box body; the inner core shaft piece comprises a supporting upright post, a guide cover, a filtering heat exchange supporting body, a water sealing plate and a filter screen body; the filtering heat exchange support body comprises a plurality of support rings; a convex connecting plate is welded at an interval of 90 degrees on the outer part of the supporting circular ring; the water sealing plates are of cambered surface structures, are provided with four water sealing plates and are welded between two adjacent connecting plates respectively, and the water sealing plates and the connecting plates are welded to form a cylinder structure; the water sealing plate and the connecting plate are adopted for splicing, so that the heat conduction between the water sealing plate and the connecting plate is reduced, and the water sealing plate can be conveniently processed and produced; after the water sealing plate is processed, a pressurized water injection sealing test is needed, and finally, after the whole inner core shaft piece is assembled, a secondary water injection pressurized sealing test is needed; the water seal plate comprises an inner plate and an outer plate, and a plurality of through grooves are formed in the inner plate and the outer plate in a right opposite way; the outer parts of the inner plate and the outer plate are sealed and welded through sealing edges; an inner baffle plate in a shape of a Chinese character 'kou' is arranged between the inner plate and the outer plate at the through groove; the inner surfaces of the lower part and the upper part of the water seal plate are provided with holes and welded with a wire head; the outer surface of the outer plate is integrally provided with an arc-shaped groove surface; the filter screen body is fixed on the concave groove surface through welding or bolts and nuts; the support upright post and the guide cover are integrally manufactured or penetrate through the center of the guide cover; a plurality of rows of inner pull rods are welded on the supporting upright posts; the other end of the inner pull rod is welded to the inner face of the inner plate; the air guide sleeve comprises a V-shaped or four arc-shaped sleeve bodies; two sides of the cover body are welded to the connecting plate respectively; the top surface and the bottom surface of the cover body are welded to the inner surface of the inner plate respectively; the two opposite cover bodies are communicated through the middle channel; the middle channels of the adjacent cover bodies are arranged in a staggered way up and down; the top and the bottom of the supporting upright post are welded with round reinforcing seat bodies; the two reinforcing seat bodies are fixed on the top surface and the bottom surface of the inner side of the closed box body;
the heat exchange assembly comprises a liquid inlet pipe group and a steam exhaust pipe group; the liquid inlet pipe group and the steam exhaust pipe group are respectively composed of four L-shaped metal pipes; one ends of the liquid inlet pipe group and the steam exhaust pipe group are respectively connected to the screw heads, and the other ends of the liquid inlet pipe group and the steam exhaust pipe group penetrate through the reinforcing seat and the closed box body and are connected to the main pipe through the water valve body; the two main pipes are respectively connected to the steam exhaust pipe and the water inlet pipe; the steam exhaust pipe is integrated into a steam drum pipeline or a steam pipe network; the water inlet pipe is connected to a power generation condensate recovery pipe or a front-end heat exchange pipe;
the transition cover comprises a cover body with two hollow ends; the cover body is welded between the inner core shaft piece and the closed box body, and the two ends of the cover body are respectively covered with the large flange seat and the filter screen body in an aligned mode; the bottom of the transition cover is communicated with an outer calandria; the outer calandria is connected to the small flange seat; the filter cover can form a closed channel in the closed box body, so that the leakage of smoke is avoided;
two adjacent large flange seats are respectively connected to the flue pipe through two large valve bodies, and the remaining two large flange seats are respectively connected to the outer smoke exhaust pipe through the large valve bodies;
two adjacent small flange seats are connected to the high-pressure fan through two small valve bodies respectively, and the remaining two small flange seats are connected to the bag-type dust collector through the small valve bodies respectively.
When the high-temperature exhaust gas enters a large valve body through a flue pipe, enters the large valve body on the opposite side of the large valve body through an inner shaft member, and enters an outer smoke exhaust pipe, and finally carries out next-stage heat exchange again or directly discharges the gas to a chimney;
after the high-temperature exhaust enters the closed box body, the high-temperature exhaust is led into the filter screen body through the transition cover; the filter screen body slows down the exhaust flow rate, meanwhile, the front-end heat exchange tube (the return tube of the heat exchanger of the next stage for completing heat exchange) or the power generation condensate recovery tube pumps water with certain residual temperature into the water inlet tube, and selects two liquid inlet tubes currently working through the water valve body, water flow is pumped into the water seal plate, and forms a plurality of flow channels through the inner partition plate in the water seal plate; the exhaust gas after heat exchange enters the guide cover, namely, firstly enters the opposite side cover body through a cover body and a middle channel, and finally is discharged outside to close the box body;
after the valve is used for a period of time, the two opened valve bodies are closed, and the other two valve bodies are opened, so that the tail gas reversing heat exchange is realized, the water valve bodies are synchronously switched, and the large valve bodies and the water valve bodies on the same side are synchronously opened and synchronously closed; then, opening the small valve bodies on the same side of the two large valve bodies to be closed; and starting a high-pressure fan and a cloth bag dust remover, wherein the high-pressure fan carries out variable-frequency high-pressure impact on accumulated ash in the channel in a reverse mode, dust gas discharged outside is removed through the cloth bag dust remover, and after the dust removal is completed, the small valve body is closed to wait for the next switching of the heat exchange channel and ash removal.
Further, the middle channel is a channel or a pipeline, and when the channel is adopted, the four cover bodies and the middle channel are integrally manufactured into a cross-shaped column body; the channel is directly arranged at the intersection of the columns.
Further, the water valve body is an electric control stop valve, and the large valve body and the small valve body are hydraulic flashboard electric control valves; the water valve body, the large valve body and the small valve body are connected to the controller; the control ends of the high-pressure fan and the bag-type dust remover are connected to a controller, and the controller can periodically switch a heat exchange channel and automatically remove ash.
Compared with the prior art, the thermal power generation secondary heat energy recovery mechanism is integrally provided with the functions of filtering and heat exchanging, high-temperature gas is filtered and simultaneously is reduced in flow speed, the heat exchange end rapidly absorbs heat and is vaporized, and on-line periodic ash removal can be realized, so that the device can efficiently recover the secondary heat energy.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic view of the overall structure of the inner core shaft of the present utility model.
Fig. 3 is a schematic view of a partial enlarged structure of fig. 2A according to the present utility model.
Fig. 4 is a schematic view of a filtering heat exchange support structure according to the present utility model.
Fig. 5 is a schematic view of the overall structure of the water seal plate of the present utility model.
Fig. 6 is a schematic view of the internal structure of the water seal plate of the present utility model.
FIG. 7 is a schematic view showing a structure in which the intake pipe group and the exhaust pipe group of the present utility model are mounted on a reinforcing seat
FIG. 8 is a schematic view of an integrated air guide sleeve according to the present utility model
FIG. 9 is a schematic view of the whole structure of a heat exchange channel according to the present utility model
Detailed Description
Example 1
The thermal power generation secondary heat energy recovery mechanism as shown in FIGS. 1 to 9 comprises
Closing the box body 1; four sides of the closed box body 1 are respectively provided with a large flange seat 2 and a small flange seat 3; the closed box body is used as a support body of the heat exchange and filtration assembly, and when the inner core shaft piece is assembled, the heat insulation cotton is fully filled in the closed box body;
two adjacent large flange seats 2 are respectively connected to the flue pipe 4 through two large valve bodies 21, and the remaining two large flange seats 2 are respectively connected to the outer smoke exhaust pipe 5 through the large valve bodies 21;
two adjacent small flange seats 3 are respectively connected to the high-pressure fan 6 through two small valve bodies 31, and the remaining two small flange seats 3 are respectively connected to the bag-type dust collector 7 through the small valve bodies 31;
the inner core shaft piece is fixed on the inner side of the closed box body 1; the inner mandrel piece comprises a supporting upright post 8, a guide cover 9, a filtering heat exchange supporting body 12, a water seal plate 11 and a filter screen body 13; the filtering heat exchange support 12 comprises a plurality of support rings 121; a convex connecting plate 122 is welded at an interval of 90 degrees on the outer part of the supporting ring 121; the water seal plates 11 are of cambered surface structures, are provided with four water seal plates and are welded between two adjacent connecting plates 122 respectively, and the water seal plates 11 and the connecting plates 122 are welded to form a cylindrical structure; the water sealing plate and the connecting plate are adopted for splicing, so that the heat conduction between the water sealing plate and the connecting plate is reduced, and the water sealing plate can be conveniently processed and produced; after the water sealing plate is processed, a pressurized water injection sealing test is needed, and finally, after the whole inner core shaft piece is assembled, a secondary water injection pressurized sealing test is needed; the water seal plate 11 comprises an inner plate 111 and an outer plate 112, and a plurality of through grooves 113 are formed in the inner plate 111 and the outer plate 112; the outer parts of the inner plate 111 and the outer plate 112 are welded in a sealing way through a sealing edge 114; an inner baffle 115 shaped like a Chinese character 'kou' is arranged between the inner plate 111 and the outer plate 112 at the through groove; the inner surfaces of the lower part and the upper part of the water seal plate 11 are provided with holes and welded with a wire head 116; the outer surface of the outer plate 112 is integrally provided with an arc-shaped groove surface 1121; the filter screen body 13 is fixed on the concave groove surface 1121 by welding or bolts and nuts; the support upright post 8 and the guide cover 9 are integrally manufactured or penetrate through the center of the guide cover 9; a plurality of rows of inner pull rods are welded on the supporting upright posts; the other end of the inner pull rod is welded to the inner face of the inner plate 111; the air guide sleeve 9 comprises a V-shaped or four arc-shaped sleeve body 91; both sides of the cover 91 are welded to the connecting plate 122 respectively; the top and bottom surfaces of the cover 91 are welded to the inner surface of the inner plate 111, respectively; the two opposite cover bodies 91 are communicated through a middle channel 92; the middle channels 92 adjacent to the cover 91 are arranged in a staggered manner up and down; the top and the bottom of the supporting upright post 8 are welded with a round reinforcing seat body 81; the two reinforcing seats 81 are fixed on the top surface and the bottom surface of the inner side of the closed box body 1;
a heat exchange assembly including a liquid inlet tube group 141 and a vapor exhaust tube group 142; the liquid inlet pipe group 141 and the steam exhaust pipe group 142 are respectively composed of four L-shaped metal pipes; one ends of the liquid inlet pipe group 141 and the steam exhaust pipe group 142 are respectively connected to the spinneret 116, and the other ends pass through the reinforcing seat 81 and the closed box body and are connected to the main pipe 144 through the water valve body 143; the two main pipes 144 are respectively connected to a steam exhaust pipe 145 and a water inlet pipe 146; the exhaust 145 is incorporated into a drum line or steam pipe network; the water inlet pipe 146 is connected to a power generation condensate recovery pipe or a front-end heat exchange pipe;
a transition cover 15, wherein the transition cover 15 comprises a cover body with two hollow ends; the cover body is welded between the inner core shaft piece and the closed box body 1, and two ends of the cover body are respectively covered with the large flange seat 3 and the filter screen body 13 in an aligned mode; the bottom of the transition cover 15 is communicated with an outer drain pipe 16; the outer drain tube 16 is connected to the small flange seat 3; the filter cover can form a closed channel in the closed box body, so that the leakage of smoke is avoided.
The middle channel 92 is a channel or a pipeline, and when the channel is adopted, four cover bodies and the middle channel are integrally manufactured into a cross-shaped column body; the channel is directly arranged at the intersection of the columns. The water valve body 143 is an electric control stop valve, and the large valve body 21 and the small valve body 31 are hydraulic flashboard electric control valves; the water valve body 143, the large valve body 21 and the small valve body 31 are all connected to the controller; the control ends of the high-pressure fan 6 and the bag-type dust collector 7 are connected to a controller, and the controller can periodically switch a heat exchange channel and automatically remove ash.
When the high-temperature exhaust gas enters a large valve body through a flue pipe, enters the large valve body on the opposite side of the large valve body through an inner shaft member, and enters an outer smoke exhaust pipe, and finally carries out next-stage heat exchange again or directly discharges the gas to a chimney;
after the high-temperature exhaust enters the closed box body, the high-temperature exhaust is led into the filter screen body through the transition cover; the filter screen body slows down the exhaust flow rate, meanwhile, the front-end heat exchange tube (the return tube of the heat exchanger of the next stage for completing heat exchange) or the power generation condensate recovery tube pumps water with certain residual temperature into the water inlet tube, and selects two liquid inlet tubes currently working through the water valve body, water flow is pumped into the water seal plate, and forms a plurality of flow channels through the inner partition plate in the water seal plate; the exhaust gas after heat exchange enters the guide cover, namely, firstly enters the opposite side cover body through a cover body and a middle channel, and finally is discharged outside to close the box body;
after the valve is used for a period of time, the two opened valve bodies are closed, and the other two valve bodies are opened, so that the tail gas reversing heat exchange is realized, the water valve bodies are synchronously switched, and the large valve bodies and the water valve bodies on the same side are synchronously opened and synchronously closed; then, opening the small valve bodies on the same side of the two large valve bodies to be closed; and starting a high-pressure fan and a cloth bag dust remover, wherein the high-pressure fan carries out variable-frequency high-pressure impact on accumulated ash in the channel in a reverse mode, dust gas discharged outside is removed through the cloth bag dust remover, and after the dust removal is completed, the small valve body is closed to wait for the next switching of the heat exchange channel and ash removal.
The above embodiments are merely preferred embodiments of the present utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.
Claims (3)
1. A thermal power generation secondary heat recovery mechanism which is characterized in that: comprising
Closing the box body; the four sides of the closed box body are respectively provided with a large flange seat and a small flange seat;
the inner core shaft piece is fixed on the inner side of the closed box body; the inner core shaft piece comprises a supporting upright post, a guide cover, a filtering heat exchange supporting body, a water sealing plate and a filter screen body; the filtering heat exchange support body comprises a plurality of support rings; a convex connecting plate is welded at an interval of 90 degrees on the outer part of the supporting circular ring; the water sealing plates are of cambered surface structures, are provided with four water sealing plates and are welded between two adjacent connecting plates respectively, and the water sealing plates and the connecting plates are welded to form a cylinder structure; the water seal plate comprises an inner plate and an outer plate, and a plurality of through grooves are formed in the inner plate and the outer plate in a right opposite way; the outer parts of the inner plate and the outer plate are sealed and welded through sealing edges; an inner baffle plate in a shape of a Chinese character 'kou' is arranged between the inner plate and the outer plate at the through groove; the inner surfaces of the lower part and the upper part of the water seal plate are provided with holes and welded with a wire head; the outer surface of the outer plate is integrally provided with an arc-shaped groove surface; the filter screen body is fixed on the concave groove surface through welding or bolts and nuts; the support upright post and the guide cover are integrally manufactured or penetrate through the center of the guide cover; a plurality of rows of inner pull rods are welded on the supporting upright posts; the other end of the inner pull rod is welded to the inner face of the inner plate; the air guide sleeve comprises a V-shaped or four arc-shaped sleeve bodies; two sides of the cover body are welded to the connecting plate respectively; the top surface and the bottom surface of the cover body are welded to the inner surface of the inner plate respectively; the two opposite cover bodies are communicated through the middle channel; the middle channels of the adjacent cover bodies are arranged in a staggered way up and down; the top and the bottom of the supporting upright post are welded with round reinforcing seat bodies; the two reinforcing seat bodies are fixed on the top surface and the bottom surface of the inner side of the closed box body;
the heat exchange assembly comprises a liquid inlet pipe group and a steam exhaust pipe group; the liquid inlet pipe group and the steam exhaust pipe group are respectively composed of four L-shaped metal pipes; one ends of the liquid inlet pipe group and the steam exhaust pipe group are respectively connected to the screw heads, and the other ends of the liquid inlet pipe group and the steam exhaust pipe group penetrate through the reinforcing seat and the closed box body and are connected to the main pipe through the water valve body; the two main pipes are respectively connected to the steam exhaust pipe and the water inlet pipe; the steam exhaust pipe is integrated into a steam drum pipeline or a steam pipe network; the water inlet pipe is connected to a power generation condensate recovery pipe or a front-end heat exchange pipe;
the transition cover comprises a cover body with two hollow ends; the cover body is welded between the inner core shaft piece and the closed box body, and the two ends of the cover body are respectively covered with the large flange seat and the filter screen body in an aligned mode; the bottom of the transition cover is communicated with an outer calandria; the outer calandria is connected to the small flange seat;
two adjacent large flange seats are respectively connected to the flue pipe through two large valve bodies, and the remaining two large flange seats are respectively connected to the outer smoke exhaust pipe through the large valve bodies;
two adjacent small flange seats are connected to the high-pressure fan through two small valve bodies respectively, and the remaining two small flange seats are connected to the bag-type dust collector through the small valve bodies respectively.
2. The thermal power generation secondary heat energy recovery mechanism according to claim 1, wherein: the middle channel is a channel or a pipeline, and when the channel is adopted, the four cover bodies and the middle channel are integrally manufactured into a cross-shaped column body; the channel is directly arranged at the intersection of the columns.
3. The thermal power generation secondary heat energy recovery mechanism according to claim 1, wherein: the water valve body is an electric control stop valve, and the large valve body and the small valve body are hydraulic flashboard electric control valves; the water valve body, the large valve body and the small valve body are connected to the controller; and the control ends of the high-pressure fan and the bag-type dust collector are connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320605902.2U CN219551292U (en) | 2023-03-24 | 2023-03-24 | Secondary heat energy recovery mechanism for thermal power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320605902.2U CN219551292U (en) | 2023-03-24 | 2023-03-24 | Secondary heat energy recovery mechanism for thermal power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219551292U true CN219551292U (en) | 2023-08-18 |
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ID=87702373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320605902.2U Active CN219551292U (en) | 2023-03-24 | 2023-03-24 | Secondary heat energy recovery mechanism for thermal power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219551292U (en) |
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2023
- 2023-03-24 CN CN202320605902.2U patent/CN219551292U/en active Active
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