CN116146970A - Welded plate-type coal economizer - Google Patents
Welded plate-type coal economizer Download PDFInfo
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- CN116146970A CN116146970A CN202310443088.3A CN202310443088A CN116146970A CN 116146970 A CN116146970 A CN 116146970A CN 202310443088 A CN202310443088 A CN 202310443088A CN 116146970 A CN116146970 A CN 116146970A
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- heat transfer
- plate
- transfer plates
- outer shell
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the technical field of economizers, and particularly relates to a welded plate-type economizer, which comprises the following components: the heat transfer plate comprises two heat transfer plates which are oppositely arranged, wherein the outer edges of the two heat transfer plates are fixedly connected, the surfaces of the two heat transfer plates are fixedly connected through a plurality of fixing point groups, the fixing point groups are arranged at equal intervals along the length direction of the heat transfer plates, the adjacent two fixing point groups are arranged in a staggered mode, each fixing point group comprises a plurality of fixing points, the fixing points are arranged at equal intervals from top to bottom, the parts, which are not the fixing points, of the surfaces of the heat transfer plates are outwards bulged, and a flow channel is formed between the two heat transfer plates. According to the invention, water flows in the heat transfer plate, heat in the flue gas is directly transferred to water through the heat transfer plate, so that consumption in a heat transfer process is reduced, meanwhile, the non-fixed point of the heat transfer plate bulges outwards, the contact area between the heat transfer plate and the flue gas is increased, the heat exchange efficiency is increased, and meanwhile, the flue gas is not easy to block.
Description
Technical Field
The invention belongs to the technical field of economizers, and particularly relates to a welded plate-type economizer.
Background
The Economizer (english name Economizer) is a device installed at the lower part of the tail flue of the boiler for recovering the waste heat of exhausted smoke, and heats boiler feed water into the heating surface of saturated water under the drum pressure.
Most of the existing economizers belong to a light pipe type, have low heat transfer efficiency, small heat exchange area per unit volume and large equipment weight, and if the light pipe type economizers with fins are adopted, because the flue gas of a coal-fired boiler contains a large amount of dust, the light pipe type economizers are easy to block and lose efficacy quickly, cannot be used for a long time and are difficult to clean, so that a welding type plate type economizer is needed.
Disclosure of Invention
The invention aims to provide a welded plate-type economizer which aims to solve the problems.
In order to achieve the above object, the present invention provides the following solutions:
a welded plate economizer comprising: the heat transfer device comprises an outer shell, wherein a plurality of vertically arranged heat transfer plates are arranged in the outer shell, the heat transfer plates are arranged along the length direction of the outer shell, a plurality of heat transfer plates are arranged at equal intervals along the width direction of the outer shell, a flow passage is arranged in the heat transfer plates, a water supply mechanism and a water outlet mechanism are fixedly connected to the top end of each heat transfer plate, the water supply mechanism and the water outlet mechanism are communicated with the flow passage, the water supply mechanism and the water outlet mechanism are respectively positioned on two sides of the top end of each heat transfer plate, and the water supply mechanism and the water outlet mechanism extend out of the outer shell;
the heat transfer plate comprises two heat transfer plates which are oppositely arranged, wherein the outer edges of the two heat transfer plates are fixedly connected, the surfaces of the two heat transfer plates are fixedly connected through a plurality of fixing point groups, the fixing point groups are arranged at equal intervals along the length direction of the heat transfer plates, two adjacent fixing point groups are arranged in a staggered mode, each fixing point group comprises a plurality of fixing points, the fixing points are arranged at equal intervals from top to bottom, the parts, which are not the fixing points, of the surfaces of the heat transfer plates are outwards bulged, and the bulges form flow channels between the two heat transfer plates.
Preferably, the heat transfer plate is provided with a plurality of upper water retaining welding bars and a plurality of lower water retaining welding bars, the upper water retaining welding bars and the lower water retaining welding bars are vertically arranged, the upper water retaining welding bars and the lower water retaining welding bars are arranged in a staggered mode, and the bottom ends of the upper water retaining welding bars and the top ends of the lower water retaining welding bars are located on the same horizontal plane.
Preferably, the water supply mechanism comprises a water inlet pipe communicated with the water inlet of the heat transfer plate, the top ends of a plurality of water inlet pipes penetrate out of the top end of the outer shell and are communicated with a diverter, and the diverter is communicated with a water supply pipe.
Preferably, the water outlet mechanism comprises a water outlet pipe communicated with the water outlet of the heat transfer plate, the top ends of a plurality of water outlet pipes penetrate out of the top end of the outer shell and are communicated with a confluence device, and the confluence device is communicated with a water pipe.
Preferably, a plurality of reinforcing frames are fixedly connected to the outer edge of the outer shell in the circumferential direction, and the reinforcing frames are arranged at equal intervals along the length direction of the outer shell.
Preferably, the head ends and the tail ends of the heat transfer plates are fixedly connected in two fixing frames respectively, and the two fixing frames and the outer shell are coaxially arranged and fixedly connected.
Preferably, the thickness of the heat-conducting plate is 0.5-1.5mm.
Preferably, the heat conducting plate is made of stainless steel.
Compared with the prior art, the invention has the following advantages and technical effects:
in the invention, the high-temperature flue gas of the boiler firstly enters the outer shell from the inlet end of the outer shell (namely one end of the water inlet of the heat transfer plate); the high-temperature flue gas transfers the temperature to water in the heat transfer plate under the action of the heat transfer plate, and the water continuously flows to take away heat, so that heat energy exchange is realized;
according to the invention, water flows in the heat transfer plate, heat in the flue gas is directly transferred to water through the heat transfer plate, so that consumption in the heat transfer process is reduced, meanwhile, the non-fixed point of the heat transfer plate bulges outwards, the contact area between the heat transfer plate and the flue gas is increased, and the heat exchange efficiency is increased; meanwhile, the problems that the contact area between the traditional finned light pipe type coal economizer and smoke is increased through fins, the distance between the fins is smaller, and the traditional finned light pipe type coal economizer is easy to block are avoided.
Drawings
For a clearer description of an embodiment of the invention or of the solutions of the prior art, the drawings that are needed in the embodiment will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art:
FIG. 1 is a front view of the present invention;
FIG. 2 is a right side view of the present invention;
FIG. 3 is a front view of a heat conductive plate according to the present invention;
fig. 4 is a schematic structural view of embodiment 2;
FIG. 5 is a schematic diagram of the ash removal mechanism in embodiment 2;
FIG. 6 is an enlarged view of a portion of FIG. 4 at A;
1. a reinforcing frame; 2. an outer housing; 3. a fixed frame; 4. a water inlet pipe; 5. a shunt; 6. a water supply pipe; 7. a heat transfer plate; 8. a confluence device; 9. a water outlet pipe; 10. a water retaining welding strip is arranged; 11. a lower water retaining welding strip; 12. a motor; 13. a protective shell; 14. a first bevel gear; 15. a second bevel gear; 16. a transmission shaft; 18. a mounting plate; 19. a threaded rod; 20. a middle tube; 21. a medicine mixing tube; 22. a first electromagnetic valve; 23. a second electromagnetic valve; 24. a third electromagnetic valve; 25. a drug mixing water supply pipe; 26. a medicine box; 27. an ash removal roller; 28. a nut; 29. a worm wheel; 30. a short shaft; 31. a bearing seat; 32. a transmission box; 33. a first driving wheel; 34. a second driving wheel; 35. a connecting rod; 36. a rotating drum; 37. and a connecting shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
Referring to fig. 1 to 3, the present embodiment provides a welded plate economizer including: the heat transfer device comprises an outer shell body 2, wherein a plurality of vertically arranged heat transfer plates 7 are arranged in the outer shell body 2, the heat transfer plates 7 are arranged along the length direction of the outer shell body 2, a plurality of heat transfer plates 7 are arranged at equal intervals along the width direction of the outer shell body 2, flow channels are arranged in the heat transfer plates 7, a water supply mechanism and a water outlet mechanism are fixedly connected to the top ends of the heat transfer plates 7, the water supply mechanism and the water outlet mechanism are communicated with the flow channels, the water supply mechanism and the water outlet mechanism are respectively positioned on two sides of the top ends of the heat transfer plates 7, and the water supply mechanism and the water outlet mechanism extend out of the outer shell body 2;
the heat transfer plate 7 comprises two heat conducting plates which are oppositely arranged, the outer edges of the two heat conducting plates are fixedly connected, the surfaces of the two heat conducting plates are fixedly connected through a plurality of fixing point groups, the fixing point groups are arranged at equal intervals along the length direction of the heat conducting plates, the adjacent two fixing point groups are arranged in a staggered mode, each fixing point group comprises a plurality of fixing points, the fixing points are arranged at equal intervals from top to bottom, the parts, which are not fixedly connected, of the surfaces of the heat conducting plates are outwards raised, and a runner is formed between the two heat conducting plates by the raised parts.
Further optimizing scheme is provided with a plurality of manger plate welding strip 10 and a plurality of lower manger plate welding strip 11 on the heat transfer slab 7, goes up manger plate welding strip 10 and lower manger plate welding strip 11 all vertical setting, and crisscross setting between a plurality of manger plate welding strip 10 and a plurality of lower manger plate welding strip 11 goes up manger plate welding strip 10's bottom and the top of lower manger plate welding strip 11 is located same horizontal plane.
So set up, make water flow along the runner that upper water retaining welding strip 10 and lower water retaining welding strip 11 left, avoid in the heat transfer process, the water that is located the bottom can't flow, only the rivers at top participate in the heat exchange, influence the efficiency of this device heat exchange.
Further optimizing scheme, water supply mechanism includes the inlet tube 4 with heat transfer sheet 7 water inlet intercommunication, and the top of a plurality of inlet tubes 4 all wears out the top of shell body 2 and communicates there is shunt 5, and shunt 5 communicates there is delivery pipe 6.
The external water supply device supplies water into the shunt 5 through the water supply pipe 6; the flow divider 5 feeds water into the heat transfer plate 7 through the several inlet pipes 4 and causes the water to flow along the flow channels in the heat transfer plate 7.
Further optimizing scheme, the water outlet mechanism includes the outlet pipe 9 that communicates with heat transfer sheet 7 delivery port, and the top of a plurality of outlet pipes 9 all wears out the top of shell body 2 and communicates there is confluence ware 8, and confluence ware 8 communicates there is the raceway. The water in the heat transfer sheet 7 flows into the confluence device 8 through the water outlet pipe 9, flows into a water pipe (not shown) through the confluence device 8 and is sent to a designated place.
According to the further optimization scheme, the outer edge of the outer shell body 2 is fixedly connected with a plurality of reinforcing frames 1 in the circumferential direction, and the reinforcing frames 1 are arranged at equal intervals along the length direction of the outer shell body 2.
Through the peripheral direction rigid coupling reinforcing frame 1 in outer fringe department of shell body 2 for the structure of shell body 2 is more stable, and is not fragile.
In a further optimized scheme, the head ends and the tail ends of the heat transfer plates 7 are fixedly connected in the two fixing frames 3 respectively, and the two fixing frames 3 are coaxially arranged and fixedly connected with the outer shell 2. Firstly, a plurality of heat transfer plates 7 are fixed end to end through two fixing frames 3, then the heat transfer plates 7 are placed in the outer shell 2, and then the fixing frames 3 are fixedly connected with the outer shell 2, so that the installation is more convenient.
In a further optimized scheme, the thickness of the heat-conducting plate is 0.5-1.5mm. So that the heat conducting plate is firm and durable and does not affect the heat exchange efficiency.
According to a further optimization scheme, the heat conducting plate is made of stainless steel. The heat conducting plate is made of stainless steel, has smooth appearance and is not easy to adhere to corrosive substances, soot and other impurities.
Working principle: the external water supply mechanism supplies water to the inside of the flow divider 5 through the water supply pipe 6, the flow divider 5 transmits water into the heat transfer plate 7 through the plurality of water inlet pipes 4, and the water flows to the water outlet pipe 9 and is converged in the converging device 8 to flow out through the water delivery pipe; in the process, the flue gas is continuously introduced into the outer shell 2 and passes between the heat transfer plates 7, and the heat transfer plates 7 take away the heat in the flue gas through the flow of water, so that the heat exchange is realized.
Example 2
Referring to fig. 4 to 6, the difference from embodiment 1 is that an ash removing mechanism and a descaling component are also provided in this embodiment;
the ash removing mechanism comprises a mounting plate 18 fixedly connected to the bottom end of the outer shell 2, a protective shell 13 is fixedly connected to the bottom surface of the mounting plate 18, a motor 12 is fixedly connected to the bottom surface of the mounting plate 18, a transmission shaft 16 is coaxially fixedly connected to an output shaft of the motor 12, the transmission shaft 16 is rotatably connected in the protective shell 13, the transmission shaft 16 is perpendicular to the heat transfer plates 7, a plurality of first bevel gears 14 are fixedly connected to the transmission shaft 16 at equal intervals, the first bevel gears 14 are meshed with second bevel gears 15, threaded rods 19 which are vertically arranged are coaxially fixedly connected to the second bevel gears 15, the top ends of the threaded rods 19 penetrate into the outer shell 2, a threaded rod 19 is arranged between every two adjacent heat transfer plates 7, a transmission box 32 is slidably connected to the outer side wall of each threaded rod 19, a nut 28 is fixedly connected to the top wall of each transmission box 32, and each nut 28 is in threaded connection with each threaded rod 19; two bearing seats 31 are fixedly connected to the bottom wall of the inner side of the transmission box 32, a short shaft 30 is rotatably connected to the bearing seats 31, one end of the short shaft 30 is coaxially fixedly connected with a worm wheel 29, the worm wheel 29 is meshed with the threaded rod 19, the two worm wheels 29 are respectively positioned on two opposite sides of the threaded rod 19, a first transmission wheel 33 is coaxially fixedly connected to the other end of the short shaft 30, a connecting rod 35 is rotatably connected to one side, far away from the short shaft 30, of the first transmission wheel 33, and the connecting rod 35 is not coaxial with the first transmission wheel 33; the other end of the connecting rod 35 is rotationally connected with a second driving wheel 34, the second driving wheel 34 is not coaxial with the connecting rod 35, one side of the second driving wheel 34 far away from the connecting rod 35 is coaxially and fixedly connected with a connecting shaft 37, the connecting shaft 37 extends out of the driving box 32 and is coaxially and fixedly connected with an ash removing roller 27, the outer side wall of the connecting shaft 37 is rotationally connected with a rotary drum 36, the rotary drum 36 is fixedly connected on the outer side wall of the driving box 32, the ash removing roller 27 is positioned on two opposite sides of the threaded rod 19, the two ash removing rollers 27 are coaxially arranged, and the ash removing roller 27 is in contact with the side wall of the heat transfer plate 7;
when in operation, the device comprises: the motor 12 drives the transmission shaft 16 to rotate, so as to drive the first bevel gear 14 to rotate, the first bevel gear 14 drives the threaded rod 19 through the second bevel gear 15, and the threaded rod 19 drives the transmission box 32 to move up and down; simultaneously, the threaded rod 19 drives the worm wheel 29 to rotate, and then drives the ash removal roller 27 to remove ash on the outer side wall of the heat transfer plate 7.
The descaling assembly comprises a medicine mixing pipe 21 arranged at the top end of the flow divider 5, one end of the medicine mixing pipe 21 is communicated with the flow divider 5 through a middle pipe 20, and the other end of the medicine mixing pipe 21 is communicated with the water supply pipe 6; a second electromagnetic valve 23 is arranged between the medicine mixing pipe 21 and the water supply pipe 6, a first electromagnetic valve 22 is arranged between the water supply pipe 6 and the flow divider 5,
the side wall of the water supply pipe 6 is communicated with a medicine mixing water supply pipe 25, one end of the medicine mixing water supply pipe 25, which is far away from the water supply pipe 6, is communicated with the medicine mixing pipe 21, a third electromagnetic valve 24 and a medicine box 26 are arranged on the medicine mixing water supply pipe 25, and the third electromagnetic valve 24 is positioned between the water supply pipe 6 and the medicine box 26.
When the device works, the first electromagnetic valve 22 is closed, the second electromagnetic valve 23 and the third electromagnetic valve 24 are opened, water flow carries descaling agents in the medicine box 26 into the medicine mixing pipe 21 to be mixed, then enters the flow divider 5, and then enters the heat transfer plate 7 through the water inlet pipe 4 for descaling.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (8)
1. A welded plate economizer comprising: the heat transfer device comprises an outer shell body (2), wherein a plurality of vertically arranged heat transfer plates (7) are arranged in the outer shell body (2), the heat transfer plates (7) are arranged along the length direction of the outer shell body (2), a plurality of heat transfer plates (7) are arranged at equal intervals along the width direction of the outer shell body (2), a flow passage is arranged in the heat transfer plates (7), a water supply mechanism and a water outlet mechanism are fixedly connected to the top end of each heat transfer plate (7), the water supply mechanism and the water outlet mechanism are communicated with the flow passage, the water supply mechanism and the water outlet mechanism are respectively positioned on two sides of the top end of each heat transfer plate (7), and the water supply mechanism and the water outlet mechanism extend out of the outer shell body (2);
the heat transfer plate (7) comprises two heat transfer plates which are oppositely arranged, the outer edges of the two heat transfer plates are fixedly connected, the surfaces of the two heat transfer plates are fixedly connected through a plurality of fixing point groups, the fixing point groups are arranged at equal intervals along the length direction of the heat transfer plates, the adjacent two fixing point groups are arranged in a staggered mode, each fixing point group comprises a plurality of fixing points, the fixing points are arranged at equal intervals from top to bottom, the parts, which are not the fixing points, of the surfaces of the heat transfer plates are outwards bulged, and the bulges form flow channels between the two heat transfer plates.
2. A welded plate economizer according to claim 1 wherein: be provided with a plurality of manger plate welded strip (10) and a plurality of manger plate welded strip (11) down on heat transfer slab (7), go up manger plate welded strip (10) with lower manger plate welded strip (11) all vertically set up, a plurality of go up manger plate welded strip (10) and a plurality of crisscross setting between lower manger plate welded strip (11), go up the bottom of manger plate welded strip (10) with the top of lower manger plate welded strip (11) is located same horizontal plane.
3. A welded plate economizer according to claim 1 wherein: the water supply mechanism comprises a water inlet pipe (4) communicated with the water inlet of the heat transfer plate (7), a plurality of water inlet pipes (4) penetrate out of the top end of the outer shell (2) and are communicated with a diverter (5), and the diverter (5) is communicated with a water supply pipe (6).
4. A welded plate economizer according to claim 1 wherein: the water outlet mechanism comprises water outlet pipes (9) communicated with water outlets of the heat transfer plates (7), the top ends of the water outlet pipes (9) penetrate out of the top end of the outer shell (2) and are communicated with a confluence device (8), and the confluence device (8) is communicated with a water delivery pipe.
5. A welded plate economizer according to claim 1 wherein: the outer edge of the outer shell body (2) is fixedly connected with a plurality of reinforcing frames (1) in the circumferential direction, and the reinforcing frames (1) are arranged at equal intervals along the length direction of the outer shell body (2).
6. A welded plate economizer according to claim 1 wherein: the head ends and the tail ends of the heat transfer plates (7) are fixedly connected in two fixing frames (3) respectively, and the two fixing frames (3) and the outer shell (2) are coaxially arranged and fixedly connected.
7. A welded plate economizer according to claim 2 wherein: the thickness of the heat-conducting plate is 0.5-1.5mm.
8. A welded plate economizer according to claim 2 wherein: the heat conducting plate is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310443088.3A CN116146970B (en) | 2023-04-24 | 2023-04-24 | Welded plate-type coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310443088.3A CN116146970B (en) | 2023-04-24 | 2023-04-24 | Welded plate-type coal economizer |
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| CN116146970A true CN116146970A (en) | 2023-05-23 |
| CN116146970B CN116146970B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310443088.3A Active CN116146970B (en) | 2023-04-24 | 2023-04-24 | Welded plate-type coal economizer |
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| CN208567606U (en) * | 2018-05-03 | 2019-03-01 | 杭州伯勒智能工程有限公司 | Board-like flue air heat exchanger |
| KR20190078047A (en) * | 2017-12-26 | 2019-07-04 | 고려엠지주식회사 | Non-uniform semi-welded plate type heat exchanger |
| CN113028882A (en) * | 2021-04-26 | 2021-06-25 | 上海镐渭工业技术有限公司 | Heat transfer plate recovery system for waste heat of public bathroom |
| CN214065803U (en) * | 2020-11-06 | 2021-08-27 | 无锡锡东能源科技有限公司 | Heat exchanger with scale removal structure |
| CN113623635A (en) * | 2021-07-26 | 2021-11-09 | 华能曲阜热电有限公司 | Two-row double-pipe type low-temperature economizer |
| CN113916029A (en) * | 2021-11-24 | 2022-01-11 | 上海兴全电力技术有限公司 | Horizontal plate-shell type falling film anti-scaling evaporator and application method thereof |
| CN217654201U (en) * | 2022-06-23 | 2022-10-25 | 常州市茂宏干燥设备有限公司 | Circulating filtration formula heated air circulation oven |
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2023
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| JPH08145305A (en) * | 1994-11-21 | 1996-06-07 | Hitachi Ltd | Feed water heater and power generating plant |
| JPH08233212A (en) * | 1995-02-24 | 1996-09-10 | Hitachi Ltd | Heat exchanger |
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| CN217654201U (en) * | 2022-06-23 | 2022-10-25 | 常州市茂宏干燥设备有限公司 | Circulating filtration formula heated air circulation oven |
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| Publication number | Publication date |
|---|---|
| CN116146970B (en) | 2023-07-25 |
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