CN217082599U - Power plant flue gas waste heat recovery device - Google Patents
Power plant flue gas waste heat recovery device Download PDFInfo
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- CN217082599U CN217082599U CN202220965330.4U CN202220965330U CN217082599U CN 217082599 U CN217082599 U CN 217082599U CN 202220965330 U CN202220965330 U CN 202220965330U CN 217082599 U CN217082599 U CN 217082599U
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Abstract
The utility model discloses a flue gas waste heat recovery device of a power plant, wherein a heat collection box is internally provided with a flue gas heating pipe which realizes the cold water heating treatment in the heat collection box through the heat transfer of flue gas, the flue gas heating pipe is arranged in a longitudinal spiral way, the upper end of the flue gas heating pipe is connected with an air inlet, the lower end of the flue gas heating pipe is connected with an air outlet, one side of the heat collection box is provided with a flue gas filtering box which is communicated with the air outlet and filters the flue gas, the side wall of the flue gas filtering box is used for a flue gas outlet which discharges the filtered flue gas, and the outer end of the flue gas outlet is connected with a fan which is helpful for the circulation and discharge of the flue gas; the utility model discloses an install the inside flue gas heating pipe that is spiral range of thermal-arrest incasement for waste heat transfer in the flue gas heating pipe can be abundant effectual flue gas gives the cold water heating, has not only improved the waste heat recovery who is the flue gas greatly and has utilized the effect, but also can carry out effective filtration to the impurity granule in the flue gas, avoids piling up of the impurity granule in the flue gas heating pipe to block up.
Description
Technical Field
The utility model relates to a thermal power technical field especially relates to a flue gas waste heat recovery device of power plant.
Background
Thermal power generation is a power generation mode which utilizes heat energy generated by combustible materials during combustion and converts the heat energy into electric energy through a power generation power device, the thermal power generation is a main power generation mode in China, coal resources in China are abundant, 10.9 hundred million tons of coal are produced in 1990, wherein the coal for power generation only accounts for 12%, the thermal power generation still has great potential, however, in the thermal power generation process, the heat loss of exhaust gas of a boiler accounts for a considerable proportion, the smoke quantity of a large-capacity high-parameter boiler is very large, the temperature of the exhaust gas is generally 120 ℃, the high-temperature smoke gas is directly discharged into the air, the heat loss is large, and impurity particles in the smoke gas can cause pollution.
The existing flue gas recovery equipment often filters the flue gas earlier the back, and the pipeline winding that will retrieve the flue gas again realizes the heating process to cold water in the box at the box outer wall, and this kind of mode can realize the waste heat recovery of flue gas and utilize, but still has some not enoughly:
firstly, the mode of filtering and then utilizing the smoke gas can not only cause a great loss of heat of the smoke gas in the filtering process, but also seriously affect the filtering effect and the service life of the high-temperature smoke gas after the filtering mechanism filters the high-temperature smoke gas for a long time;
the mode that the flue gas pipeline is wound on the outer wall of the box body can heat cold water in the box body, but the contact area is effective, so that heat loss and waste are caused, the periphery of the cold water can be heated only in the heating process, and the uniform and efficient heating treatment of the cold water cannot be realized;
the spiral winding of the flue gas pipeline ensures that impurity particles in the flue gas can be accumulated at the bent part of the flue gas pipeline in the flue gas circulation process, so that the flue gas pipeline is not convenient to clean and is easy to block, corrode and damage;
therefore, a flue gas waste heat recovery device which can fully utilize flue gas waste heat and is convenient for filtering impurity particles in flue gas is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome not enough among the background art, the utility model discloses a power plant flue gas waste heat recovery device is through installing the inside flue gas heating pipe that is spiral range of thermal-arrest incasement for the waste heat transfer in the flue gas heating pipe can be abundant effectual flue gas gives the cold water heating, has not only improved the waste heat recovery utilization effect to the flue gas greatly, but also can carry out effective filtration to the impurity granule in the flue gas, avoids piling up of the impurity granule in the flue gas heating pipe to block up.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a flue gas waste heat recovery device of a power plant comprises a heat collection box, wherein the side wall of the heat collection box is respectively provided with a water injection port and a water discharge port, the upper part and the lower part of the heat collection box are respectively provided with a gas inlet and a gas outlet, the upper part of the gas inlet is provided with a gas inlet pipe connected with a smoke discharge port of coal-fired power generation equipment, a flue gas heating pipe for heating cold water in the heat collection box through heat transfer of flue gas is arranged in the heat collection box, the flue gas heating pipe is arranged in a longitudinal spiral mode, the upper end of the flue gas heating pipe is connected with the gas inlet, the lower end of the flue gas heating pipe is connected with the gas outlet, one side of the heat collection box is provided with a flue gas filtering box communicated with the gas outlet and used for filtering the flue gas, the side wall of the flue gas filtering box is used for discharging the filtered flue gas, and the outer end of the flue gas outlet is connected with a fan which is beneficial to circulation and discharge of the flue gas.
Furthermore, a plurality of rotating rollers are connected in the flue gas heating pipe in a rotating mode, and a plurality of scraping plates which are driven by the rotating rollers to scrape impurity particles on the bottom surface of the flue gas heating pipe are arranged on the side wall of each rotating roller.
Furthermore, a flue gas inlet is arranged on one side of the flue gas filtering box and is in sealing connection with the gas outlet of the heat collecting box.
Furthermore, be used for in the flue gas rose box in proper order carrying out filterable filter screen to the large granule in the flue gas to and carry out filterable active carbon filter layer to the harmful substance in the flue gas.
Furthermore, the upper cover is arranged on the upper part of the flue gas filtering box, and the lower surface of the upper cover and the inner bottom surface of the flue gas filtering box are respectively provided with a limiting groove for limiting and clamping the filter screen and the active carbon filter layer.
Furthermore, the inner bottom surface of the heat collection box is an inclined bottom surface, and the water outlet is arranged on one side of the lower end of the inner bottom surface of the heat collection box.
Compared with the prior art, the beneficial effects of the utility model are that: by utilizing the flue gas heating pipes which are arranged in the heat collection box and are spirally arranged, the contact area between the flue gas heating pipes and cold water can be effectively increased, the heating efficiency of the cold water is greatly improved, and in the flue gas circulation process, impurity particles in the flue gas can roll downwards along the inclined pipe walls and the thrust of the flue gas circulation, so that the accumulation of the impurity particles in the flue gas heating pipes is greatly reduced; the utility model discloses an install the inside flue gas heating pipe that is spiral range of thermal-arrest incasement for waste heat transfer in the flue gas heating pipe can be abundant effectual flue gas gives the cold water heating, has not only improved the waste heat recovery who is the flue gas greatly and has utilized the effect, but also can carry out effective filtration to the impurity granule in the flue gas, avoids piling up of the impurity granule in the flue gas heating pipe to block up.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the flue gas heating pipe of the present invention;
fig. 3 is a schematic structural view of the flue gas filtering box of the present invention.
In the figure: 1. an air inlet pipe; 2. an air inlet; 3. a heat collection tank; 4. a water injection port; 5. a flue gas heating pipe; 6. a water outlet; 7. a flue gas filter box; 8. an activated carbon filter layer; 9. filtering with a screen; 10. a fan; 11. an air outlet; 12. a squeegee; 13. a rotating roller; 14. an upper cover; 15. a limiting groove; 16. a flue gas outlet; 17. and a flue gas inlet.
Detailed Description
In the following description, the technical solutions of the present invention will be described with reference to the drawings in the embodiments of the present invention, it should be understood that, if there are the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., it only corresponds to the drawings of the present invention, and for convenience of description, it is not intended to indicate or imply that the indicated device or element must have a specific orientation.
Referring to the attached drawings 1-3 of the specification, the utility model provides a technical scheme:
in the first embodiment, a flue gas waste heat recovery device of a power plant comprises a heat collection box 3, the side wall of the heat collection box 3 is respectively provided with a water injection port 4 and a water discharge port 6, the inner bottom surface of the heat collection box 3 is an inclined bottom surface, the water discharge port 6 is arranged at one side of the lower end of the inner bottom surface of the heat collection box 3, the upper part and the lower part of the heat collection box 3 are respectively provided with an air inlet 2 and an air outlet 11, the upper part of the air inlet 2 is provided with an air inlet pipe 1 connected with a smoke discharge port of coal-fired power generation equipment, the air inlet pipe 1 can be used for guiding the flue gas discharged by the coal-fired power generation equipment, so that the flue gas can enter the heat collection box 3 in a vertical direction, a flue gas heating pipe 5 for heating cold water in the heat collection box 3 through heat transfer to the flue gas is arranged in a longitudinal spiral manner, the upper end of the flue gas heating pipe is connected with the air inlet 2, the lower end of the flue gas is connected with the air outlet 11, and cold water is injected into the heat collection box 3 through the water injection port 4, the flue gas heating pipe 5 absorbs heat in flue gas and transmits the heat to cold water, heating treatment of the cold water is achieved, the flue gas is discharged into coal-fired power generation equipment through the water outlet 6 to be used, a flue gas filtering box 7 is arranged on one side of the heat collection box 3, a flue gas inlet 17 which is connected with the gas outlet 11 in a sealing mode is arranged on one side of the flue gas filtering box 7, a filter screen 9 which is used for filtering large particles in the flue gas and an active carbon filtering layer 8 which is used for filtering harmful substances in the flue gas are sequentially arranged in the flue gas filtering box 7, a flue gas outlet 16 which is used for discharging the filtered flue gas is arranged on the other side of the flue gas filtering box 7, the outer end of the flue gas outlet 16 is connected with the fan 10, suction force of the fan 10 is utilized to help the flue gas heating pipe 5 and circulation of the flue gas in the flue gas filtering box 7, and the flue gas can effectively flow from top to bottom along the flue gas heating pipe 5.
Embodiment two, the flue gas is along flue gas heating pipe 5 flow in-process, particle impurity in the flue gas can remain on flue gas heating pipe 5 inner wall, although be vertical spiral flue gas heating pipe 5 of arranging, and the circulation of flue gas can help particle impurity's roll emission, but still can have partial particle impurity to pile up and cause the pipeline to block up the corruption at the pipeline inner wall, for the convenience of particle impurity's roll emission, interval is equipped with several live-rollers 13 in order in flue gas heating pipe 5, the both ends of live-rollers 13 rotate with flue gas heating pipe 5's inner wall and are connected, interval is equipped with several scraper blade 12 in order on live-rollers 13's the lateral wall, blow scraper blade 12 at flue gas flow in-process and drive live-rollers 13 and rotate, scraper blade 12 can strike off the particle impurity on flue gas heating pipe 5 inner wall, avoid it to adhere on the pipeline inner wall.
In order to facilitate the disassembly and cleaning of the filter screen 9 and the activated carbon filter layer 8 in the flue gas filter box 7, a detachable upper cover 14 is arranged on the upper portion of the flue gas filter box 7, the upper cover 14 and the flue gas filter box 7 are fixedly connected through screws or are in interference sealing fit, and limiting grooves 15 used for limiting and clamping the filter screen 9 and the activated carbon filter layer 8 are formed in the lower surface of the upper cover 14 and the inner bottom surface of the flue gas filter box 7.
The details of the present invention not described in detail are prior art, and it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the scope of the claims.
Claims (6)
1. The utility model provides a power plant flue gas waste heat recovery device, includes thermal-arrest case (3), its characterized in that: the side wall of the heat collection box (3) is respectively provided with a water injection port (4) and a water discharge port (6), the upper part and the lower part of the heat collection box (3) are respectively provided with an air inlet (2) and an air outlet (11), the upper part of the air inlet (2) is provided with an air inlet pipe (1) connected with a smoke discharge port of coal-fired power generation equipment, a smoke heating pipe (5) for heating cold water in the heat collection box (3) through heat transfer of smoke is arranged in the heat collection box (3), the smoke heating pipes (5) are arranged in a longitudinal spiral manner, the upper end of the heat collecting box is connected with the air inlet (2), the lower end of the heat collecting box is connected with the air outlet (11), one side of the heat collecting box (3) is provided with a heat collecting pipe communicated with the air outlet (11), and carry out filtration treatment's flue gas rose box (7) to the flue gas, flue gas outlet (16) that the flue gas rose box (7) lateral wall was used for discharging the flue gas after filtering, fan (10) that help the circulation of flue gas to discharge are connected to flue gas outlet (16) outer end.
2. The power plant flue gas waste heat recovery device of claim 1, characterized in that: a plurality of rotating rollers (13) are rotatably connected in the flue gas heating pipe (5), and a plurality of scraping plates (12) which are driven by the rotating rollers (13) to scrape impurity particles on the bottom surface in the flue gas heating pipe (5) are arranged on the side wall of each rotating roller (13).
3. The power plant flue gas waste heat recovery device of claim 1, characterized in that: a flue gas inlet (17) is arranged on one side of the flue gas filtering box (7), and the flue gas inlet (17) is hermetically connected with the gas outlet (11) of the heat collecting box (3).
4. The power plant flue gas waste heat recovery device of claim 1, characterized in that: the smoke filtering box (7) is internally sequentially used for filtering a filtering screen (9) for large particles in smoke and an activated carbon filtering layer (8) for filtering harmful substances in the smoke.
5. The power plant flue gas waste heat recovery device of claim 4, characterized in that: an upper cover (14) is arranged on the upper part of the flue gas filtering box (7), and limiting grooves (15) used for limiting and clamping the filter screen (9) and the active carbon filtering layer (8) are arranged on the lower surface of the upper cover (14) and the inner bottom surface of the flue gas filtering box (7).
6. The power plant flue gas waste heat recovery device of claim 1, characterized in that: the inner bottom surface of the heat collection box (3) is an inclined bottom surface, and the water outlet (6) is arranged on one side of the lower end of the inner bottom surface of the heat collection box (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965330.4U CN217082599U (en) | 2022-04-25 | 2022-04-25 | Power plant flue gas waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965330.4U CN217082599U (en) | 2022-04-25 | 2022-04-25 | Power plant flue gas waste heat recovery device |
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| CN217082599U true CN217082599U (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220965330.4U Active CN217082599U (en) | 2022-04-25 | 2022-04-25 | Power plant flue gas waste heat recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718045A (en) * | 2023-06-28 | 2023-09-08 | 江西金德铅业股份有限公司 | Two suction mouth pipeline flue gas heat energy recycle device |
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2022
- 2022-04-25 CN CN202220965330.4U patent/CN217082599U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718045A (en) * | 2023-06-28 | 2023-09-08 | 江西金德铅业股份有限公司 | Two suction mouth pipeline flue gas heat energy recycle device |
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