CN211625188U

CN211625188U - Waste heat boiler for recovering heat of corrosive process gas containing halogen and salt

Info

Publication number: CN211625188U
Application number: CN202020133675.4U
Authority: CN
Inventors: 汤效飞; 李华娜; 李永胜; 傅峣
Original assignee: Beijing Senlin Technology Co ltd
Current assignee: Beijing Senlin Technology Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-10-02
Anticipated expiration: 2030-01-20

Abstract

The utility model provides a retrieve thermal exhaust-heat boiler of halogen and contain salt corrosivity process gas, relate to the flue gas treatment technology field, this exhaust-heat boiler includes steam pocket, water inlet pipe, outlet pipe way and furnace body, the steam pocket is located the top of furnace body, water inlet pipe way and outlet pipe way set up between steam pocket and furnace body, the water inlet pipe way is located the furnace body outside, the outlet pipe way part is located the furnace body inside, the outlet pipe way is switched on with the water inlet pipe way, the outlet pipe way runs through the furnace body and extends to the steam pocket direction, communicate with the steam pocket; the furnace body is internally provided with a burnout chamber and a tube bundle zone, the burnout chamber and the tube bundle zone are alternately arranged, a flue gas channel is arranged between the burnout chamber and the tube bundle zone, and a water outlet pipeline passes through the burnout chamber and the tube bundle zone. The utility model discloses set up burn-out room and tube bank district simultaneously in the furnace body is inside, the high temperature flue gas that contains corrosivity gets into burn-out room and tube bank district earlier afterwards, flue gas vortex to reach the purpose that stops longer time in the furnace body, improved high temperature flue gas radiation heat transfer efficiency.

Description

Waste heat boiler for recovering heat of corrosive process gas containing halogen and salt

Technical Field

The utility model belongs to the technical field of the flue gas treatment technique and specifically relates to a retrieve and contain the thermal exhaust-heat boiler of halogen and salt corrosivity process gas.

Background

Waste heat boilers are devices for recovering heat, and are widely used for recovering heat from flue gas discharged from a smelting furnace, for example, in the field of nonferrous metallurgy.

Conventionally, a waste heat boiler generally includes a boiler body, a steam drum, and a circulation line. The circulating pipeline supplies cooling water in the steam drum to the furnace body, the mixture of water and steam after heat exchange in the furnace body returns to the steam drum, the steam is discharged through the steam drum for gas use, and the returned water is recycled.

The combination mode of the furnace body and the circulating pipeline can be a burnout chamber, namely ascending pipes forming the circulating pipeline are distributed on the inner wall of the furnace body, and the ascending pipes form a water-cooled wall and are used for absorbing the heat of the flue gas passing through the burnout chamber; the combination mode of the furnace body and the circulating pipeline can also be in a tube bundle area mode, namely, ascending tubes forming the circulating pipeline are arranged in the inner cavity of the furnace body in a tube bundle mode.

Above-mentioned burn-out room and tube bank district all exist alone generally in the furnace body, only have burn-out room or only tube bank district in the furnace body promptly, and flue gas vortex effect is poor, and the flue gas dwell time is shorter in the furnace body, leads to the flue gas radiation heat transfer efficiency relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a retrieve and contain the thermal exhaust-heat boiler of halogen and salt corrosivity process gas to the furnace body of solving among the prior art only has the burn-out room or only tube bank district, and flue gas vortex effect is poor, and flue gas dwell time is shorter in the furnace body promptly, and then arouses the poor technical problem of flue gas radiation heat transfer efficiency.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of retrieve and contain the thermal exhaust-heat boiler of salt corrosivity process gas, including steam pocket, water intake pipe, outlet pipe way and furnace body, wherein:

the steam drum is positioned above the furnace body, the water inlet pipeline and the water outlet pipeline are arranged between the steam drum and the furnace body, the water inlet pipeline is positioned outside the furnace body, the water outlet pipeline is communicated with the water inlet pipeline, and the water outlet pipeline penetrates through the furnace body, extends towards the steam drum and is communicated with the steam drum;

the furnace body is internally provided with a burn-out chamber and a tube bundle area, the burn-out chamber and the tube bundle area are alternately arranged, a flue gas channel is arranged between the burn-out chamber and the tube bundle area, and the water outlet pipeline passes through the burn-out chamber and the tube bundle area.

Preferably, the ember chambers comprise a first ember chamber and a second ember chamber, the tube bundle zone is positioned between the first ember chamber and the second ember chamber, the flue gas channel is communicated with the first ember chamber and the tube bundle zone and the second ember chamber and the tube bundle zone, and the water outlet pipeline passes through the first ember chamber and the second ember chamber.

Preferably, the first burn-out chamber is provided with a sootblower opening.

Preferably, the tube bundle zone is separated from the first ember chamber by a first partition plate, the first partition plate is arranged from one side of the inner wall of the furnace body, the tube bundle zone is separated from the second ember chamber by a second partition plate, the second partition plate is arranged from the opposite side of the inner wall of the furnace body, and the flue gas channel is positioned on the two opposite sides of the first partition plate and the second partition plate.

Preferably, the water inlet pipeline comprises a downcomer and a lower header, the lower header is positioned below the furnace body, and the downcomer is communicated with the steam drum and the lower header.

Preferably, the water outlet pipeline comprises an ascending pipe, an upper header and a pipe bundle, the upper header is positioned above the furnace body, the ascending pipe is communicated with the steam drum and the upper header, the pipe bundle penetrates through the burnout chamber and the pipe bundle area, and the pipe bundle is communicated with the upper header and the water inlet pipeline.

Preferably, the first partition plate and the second partition plate are both formed by the tube bundles, the tube bundles are vertically installed in rows, and the tube bundles are welded to each other.

Preferably, the first and second ember chambers are each formed by tube bundles, the tube bundles are vertically mounted and the tube bundles are welded to each other.

Preferably, the tube bundle zone is comprised of the tube banks arranged in large transverse intervals.

Preferably, a flue gas inlet pipe box and a flue gas outlet pipe box are arranged on two opposite sides of the furnace body, and both the flue gas inlet pipe box and the flue gas outlet pipe box are connected and communicated with the furnace body.

The utility model provides a receive and contain the thermal exhaust-heat boiler of halogen and salt corrosivity process gas has following technological effect:

this kind of retrieve and contain the thermal exhaust-heat boiler of halogen and salt corrosivity process gas, mainly used retrieve the heat that contains the halogen and contain corrosive process gas such as salt, this exhaust-heat boiler mainly comprises steam pocket, water intake pipe, outlet pipe way and furnace body, compares with traditional exhaust-heat boiler, the utility model discloses then set up burn-out room and tube bank district simultaneously in the furnace body is inside, outlet pipe way is through burn-out room and tube bank district, and the high temperature flue gas that contains corrosivity gets into earlier and burns out room and tube bank district, shifts the temperature to the rivers in the outlet pipe way, and the vortex of high temperature flue gas to reach the purpose that stops the longer time in the furnace body, improved high temperature flue gas radiation heat transfer efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a waste heat boiler according to an embodiment of the present invention;

fig. 2 is a top view of the flue gas run of the waste heat boiler of fig. 1.

Wherein, fig. 1-2:

100. a steam drum;

200. a water inlet pipeline; 201. a down pipe; 202. a lower header;

300. a water outlet pipeline; 301. an upper header; 302. a riser pipe; 303. tube bundle;

400. a furnace body; 401. a first ember chamber; 402. a tube bundle zone; 403. a second burn-up chamber; 404. a flue gas channel; 405. a first separator; 406. a second separator; 407. a flue gas inlet pipe box; 408. and a smoke outlet channel box.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, fig. 1 is a schematic view of an overall structure of a waste heat boiler according to an embodiment of the present invention, and fig. 2 is a top view of a flue gas flow of the waste heat boiler shown in fig. 1.

The recovery that this embodiment provided contains halogen and contains the thermal exhaust-heat boiler of salt corrosivity process gas, as shown in fig. 1 and fig. 2, mainly include steam pocket 100, water intake pipe 200, outlet pipe 300 and furnace body 400, the utility model discloses an exhaust-heat boiler mainly used retrieves and contains halogen and contain salt etc. corrosivity process gas heat.

The steam drum 100 supplies water to the furnace body 400, and is internally provided with a steam-water separator to realize the separation of saturated water and saturated steam.

And a water inlet pipeline 200 for transferring the water in the steam drum 100 to the furnace body 400 for heating.

The water outlet pipe 300 forms a steam-water mixture from the water heated by the furnace body 400, and transfers the mixture to the steam drum 100.

The furnace body 400 heats water when high-temperature flue gas passes through.

The specific installation modes of the steam drum 100, the water inlet pipeline 200, the water outlet pipeline 300 and the furnace body 400 are as follows: the steam pocket 100 is located above the furnace body 400, as shown in fig. 1, the water inlet pipeline 200 and the water outlet pipeline 300 are arranged between the steam pocket 100 and the furnace body 400, the water inlet pipeline 200 is located outside the furnace body 400, the water inlet pipeline 200 is simultaneously communicated with the steam pocket 100 and the furnace body 400, the water outlet pipeline 300 is communicated with the water inlet pipeline 200, the water outlet pipeline 300 penetrates through the furnace body 400 and extends towards the steam pocket 100, and is communicated with the steam pocket, that is, when high-temperature flue gas passes through the furnace body 400, the high-temperature flue gas heats water flowing through the water outlet pipeline 300 to form a steam-water mixture, so that a pressure difference is.

The inside ember chamber and the district 402 of tube bank that sets up of furnace body 400, ember chamber and the district 402 of tube bank set up in turn, and the district 402 of tube bank is located between the ember chamber promptly, sets up flue gas channel 404 between ember chamber and the district 402 of tube bank, and the high temperature flue gas passes through the ember chamber promptly, gets into the fast district of pipe through flue gas channel 404 to reach the purpose of high temperature flue gas vortex, outlet conduit 300 is through ember chamber and the district 402 of tube bank.

The tube bundle area 402 can be used for homogenizing smoke, so that no smoke dead zone is ensured, and no corrosion point exists in the whole furnace body 400.

The water outlet pipeline 300 passing through the burn-out chamber means that the water outlet pipeline 300 forms four walls of the burn-out chamber, and when high-temperature flue gas passes through the burn-out chamber, water flow passing through the water outlet pipeline 300 can absorb heat of the high-temperature flue gas to form a mixture of saturated water and saturated steam.

The water outlet pipeline 300 passing through the tube bundle area 402 means that a plurality of tubes form a tube bundle, the water flow of the water outlet pipeline 300 flows through the tube bundle, and when the high-temperature flue gas passes through the tube bundle area 402, the water flow in the tube bundle can absorb the heat of the high-temperature flue gas to form a mixture of saturated water and saturated steam.

Compare with traditional exhaust-heat boiler, the utility model discloses set up burn-out room and tube bank district 402 simultaneously inside furnace body 400, outlet pipe 300 passes through flue gas channel 404 and passes through successively burn-out room and tube bank district 402, and the high temperature flue gas that contains corrosivity gets into earlier and burns out room and tube bank district 402, shifts the temperature to the rivers in the outlet pipe, and the high temperature flue gas can carry out the vortex along flue gas channel 404, reaches the purpose that stops the longer time in furnace body 400 to flue gas radiation heat transfer efficiency has been improved.

In the concrete scheme, the utility model discloses burn-out chamber includes first burn-out chamber 401 and second burn-out chamber 403, and tube bank district 402 is located between first burn-out chamber 401 and second burn-out chamber 403, as shown in fig. 2, flue gas passageway 404 communicates first burn-out chamber 401 and tube bank district 402, also communicates tube bank district 402 and second burn-out chamber 403 simultaneously, and high temperature flue gas passes through first burn-out chamber 401, tube bank district 402 and second burn-out chamber 403 in proper order promptly, realizes the baffling of high temperature flue gas, has increased the time of stopping in furnace body 400.

The water outlet pipeline 300 passes through the first burn-out chamber 401 and the second burn-out chamber 403, specifically, the water outlet pipeline 300 forms four walls of the first burn-out chamber 401 and the second burn-out chamber 403, and when high-temperature flue gas passes through the first burn-out chamber 401 and the second burn-out chamber 403, water flow inside the water outlet pipeline 300 can absorb heat of the high-temperature flue gas.

In a specific scheme, the tube bundle zone 402 and the first ember chamber 401 are separated by a first partition plate 405, the first partition plate 405 is arranged from one side of the inner wall of the furnace body 400, the width of the first partition plate 405 is smaller than the distance between the inner walls of the opposite sides of the furnace body 400, and the part where the first partition plate 405 is not arranged forms a flue gas channel 404.

The tube bundle area 402 and the second burn-out chamber 403 are separated by a second partition plate 406, the width of the second partition plate 406 is smaller than the distance between the inner walls of the opposite sides of the furnace body 400, the second partition plate 406 is arranged from the opposite side of the inner wall of the furnace body 400, namely, when the flue gas channel 404 passes through the first burn-out chamber 401, the tube bundle area 402 and the second burn-out chamber 403, the flue gas channel is Z-shaped, and the high-temperature flue gas passes through the Z-shaped flue gas channel 404 to achieve the purpose of baffling.

In a further scheme, the water inlet pipeline 200 specifically includes a downcomer 201 and a lower header 202, as shown in fig. 1, the lower header 202 is located below the furnace body 400, the downcomer 201 communicates with the steam drum 100 and the lower header 202, and water in the steam drum 100 flows into the lower header 202 through the downcomer 201.

The water outlet line 300 comprises an ascending pipe 302, an upper header 301 and a pipe bundle 303, the upper header 301 is positioned above the furnace body 400, the ascending pipe 302 is communicated with the steam drum 100 and the upper header 301, the pipe bundle 303 penetrates through the burn-out chamber and the pipe bundle area 402, and the pipe bundle 303 is communicated with the upper header 301 and the lower header 202, namely, a saturated water and saturated steam mixture flows from the lower header 202 to the upper header 301 through the pipe bundle 303.

The utility model discloses an after-burning chamber comprises tube bank 303, and first after-burning chamber 401 and second after-burning chamber 403 constitute by tube bank 303 promptly, and tube bank 303 is the vertical installation in bank, and tube bank 303 constitutes the wall of first after-burning chamber 401 and second after-burning chamber 403, welds each other between the tube bank 303, forms the water-cooling wall, and water-cooling wall sealing performance is reliable.

The utility model discloses a tube bank district 402 also comprises tube bank 303, and tube bank 303 adopts big transverse spacing to arrange, when reducing the deposition, even with the flue gas, plays the effect that reduces the flue gas temperature simultaneously.

In the further scheme, compare with traditional exhaust-heat boiler, the utility model discloses an exhaust-heat boiler's first baffle 405 and second baffle 406 constitute by tube bank 303, weld each other between the tube bank 303, first baffle 405 and second baffle 406 have replaced traditional steel sheet by tube bank 303 promptly, tube bank 303 forms the water-cooling wall promptly, water-cooling wall temperature is unanimous with exhaust-heat boiler saturated steam temperature basically, can guarantee that water-cooling wall temperature is higher than flue gas dew point temperature, the inside saturated steam of tube bank 303 can not liquefy and form the water droplet promptly, thereby guarantee that the wall does not take place to corrode, be fit for retrieving and contain the heat of corrosivity process gas such as salt.

In a further scheme, a flue gas inlet pipe box 407 and a flue gas outlet pipe box 408 are arranged on two opposite sides of the furnace body 400, the flue gas inlet pipe box 407 and the flue gas outlet pipe box 408 are both connected and communicated with the furnace body 400, corrosive process gases containing halogen, salt and the like enter the furnace body 400 through the flue gas inlet pipe box 407, and are discharged outwards through the flue gas outlet pipe box after being cooled.

Steam-water flow: boiler feed water flows to the steam drum 100, the steam drum 100 flows to the water-cooled wall of the first burn-out chamber 401, the tube bundle 303 in the boiler tube bundle area 402 and the water-cooled wall of the second burn-out chamber 403 through the downcomer 201 and the lower header, and the boiler feed water is heated by smoke until saturated steam flows into the steam drum 100 through the riser 302 and finally is led out of the battery limits. The power of natural circulation is formed by utilizing the difference between the steam density and the water density, the water circulation multiplying power is high, and the circulation is reliable.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a retrieve thermal exhaust-heat boiler who contains halogen and contain salt corrosivity process gas which characterized in that, includes steam pocket (100), inlet channel (200), outlet channel (300) and furnace body (400), wherein:

the steam pocket (100) is positioned above the furnace body (400), the water inlet pipeline (200) and the water outlet pipeline (300) are arranged between the steam pocket (100) and the furnace body (400), the water inlet pipeline (200) is positioned outside the furnace body (400), the water outlet pipeline (300) is partially positioned inside the furnace body (400), the water outlet pipeline (300) is communicated with the water inlet pipeline (200), and the water outlet pipeline (300) penetrates through the furnace body (400), extends towards the steam pocket (100) and is communicated with the steam pocket (100);

the interior of the furnace body (400) is provided with an ember chamber and a tube bundle zone (402), the ember chamber and the tube bundle zone (402) are alternately arranged, a flue gas channel (404) is arranged between the ember chamber and the tube bundle zone (402), and the water outlet pipeline (300) passes through the ember chamber and the tube bundle zone (402).

2. The exhaust-heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 1, characterized in that said ember chambers comprise a first ember chamber (401) and a second ember chamber (403), said tube bundle zone (402) is located between said first ember chamber (401) and said second ember chamber (403), said flue gas channel (404) communicates both said first ember chamber (401) and said tube bundle zone (402) and said second ember chamber (403) and said tube bundle zone (402), and said water outlet pipe (300) passes through said first ember chamber (401) and said second ember chamber (403).

3. Waste heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 2, characterized in that the first ember chamber (401) is provided with sootblower ports.

4. The waste heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 2, characterized in that said tube bundle zone (402) is separated from said first ember chamber (401) by a first partition (405), said first partition (405) being arranged from one side of the inner wall of said furnace body (400), said tube bundle zone (402) is separated from said second ember chamber (403) by a second partition (406), said second partition (406) being arranged from the opposite side of the inner wall of said furnace body (400), said flue gas channel (404) being located on the opposite sides of said first partition (405) and said second partition (406).

5. The exhaust-heat boiler for recovering halogen-containing and salt-containing corrosive process gas heat according to claim 4, characterized in that the water inlet pipe (200) comprises a downcomer (201) and a lower header (202), the lower header (202) is located below the furnace body (400), and the downcomer (201) is communicated with the steam drum (100) and the lower header (202).

6. The exhaust-heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 4, characterized in that said water outlet line (300) comprises a riser pipe (302), an upper header (301) and a tube bundle (303), said upper header (301) is located above said furnace body (400), said riser pipe (302) communicates said steam drum (100) and said upper header (301), said tube bundle (303) runs through said burn-out chamber and said tube bundle zone (402), and said tube bundle (303) communicates said upper header (301) and said water inlet line (200).

7. The waste heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 6, characterized in that said first partition (405) and said second partition (406) are both constituted by said tube bundles (303), said tube bundles (303) being vertically installed in rows, said tube bundles (303) being welded to each other.

8. A waste heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 6, characterized in that said first ember chamber (401) and said second ember chamber (403) are both constituted by said tube bundle (303), said tube bundle (303) being vertically installed and said tube bundle (303) being welded to each other.

9. Waste heat boiler for recovering heat from halogen-containing and salt-containing corrosive process gases according to claim 6, characterized in that said tube bundle zone (402) is constituted by said tube bundles (303), said tube bundles (303) being arranged with a large lateral spacing.

10. The waste heat boiler for recovering heat of halogen-containing and salt-containing corrosive process gases according to any one of claims 1-9, characterized in that a flue gas inlet channel (407) and a flue gas outlet channel (408) are arranged at two opposite sides of the furnace body (400), and the flue gas inlet channel (407) and the flue gas outlet channel (408) are both connected and communicated with the furnace body (400).