CN115962664A - Converter gas indirect heat exchange cooler - Google Patents

Abstract

The invention provides a converter gas indirect heat exchange cooler, which relates to the technical field of gas emission in the steel industry and at least comprises a shell, a water inlet tank, a water return tank, a cleaning device and at least one heat exchange pipe set, wherein the shell is hollow and forms a heat exchange cavity, the heat exchange cavity is provided with an air inlet and an air outlet, the heat exchange pipe set is arranged in the heat exchange cavity, the heat exchange pipe set comprises a plurality of heat exchange pipes which are arranged in parallel, two ends of each heat exchange pipe respectively penetrate through the outer wall of the shell in a sealing manner, the water inlet tank and the water return tank are respectively arranged outside the shell, one end of each heat exchange pipe is communicated with the water inlet tank, the other end of each heat exchange pipe is communicated with the water return tank, and the cleaning device is arranged in the heat exchange cavity and can spray cleaning water to the outer wall of each heat exchange pipe. The converter gas indirect heat exchange cooler provided by the invention can effectively ensure the heat exchange efficiency and the service life of the heat exchanger.

Description

Converter gas indirect heat exchange cooler

Technical Field

The invention relates to the technical field of gas emission in the steel industry, in particular to a converter gas indirect heat exchange cooler.

Background

At present, the steel industry needs to meet the requirement of ultralow emission of coal gas. Through the technical upgrading of recent years, the ultralow standard of the primary gas dust emission and the gas recovery of the converter is realized. In the above coal gas recovery processing process, an important step is to cool the primary coal gas of the converter by using a cooler. The existing cooler has two cooling modes.

One cooling mode is a spray water direct cooling mode, namely, the temperature of the coal gas is reduced from 150 ℃ at an inlet to 70 ℃ at an outlet, so that the temperature requirement of a gas cabinet on the recovered coal gas is met. However, the adoption of direct spray cooling can lead the coal gas to reach a supersaturated state while reducing the temperature, a plurality of coal gas drainers are required to be arranged on the recovered coal gas pipeline, and the corrosion of the water-containing coal gas to the pipeline is serious.

The other cooling mode is an indirect heat exchange cooling mode, namely, the coal gas is cooled through a heat exchanger. The utility model with the application number of CN207435480U provides a converter gas cooling device, which adopts a low-temperature gravity type heat pipe for heat exchange; however, dust-containing condensate water is generated after the coal gas is cooled, dust is accumulated on the heat exchange tube under the action of high-temperature coal gas, and the heat exchange efficiency is obviously reduced due to the lack of effective cleaning measures of the device; in addition, the heat pipe heat exchanger has a complex structure and high processing requirements, and is difficult to maintain and replace once damaged. The utility model with the application number of CN205313588U provides another converter pure dry dedusting gas cooler, wherein a dedusting device is arranged at the front end of the cooler, but the dedusting device can not completely treat dust in gas, the gas still contains partial dust, and due to the lack of cleaning measures, after the heat exchanger runs for a long time, dust deposition on fins can cause the reduction of heat exchange efficiency, so that the temperature of outlet gas can not reach a set range, and the recovery of the gas is influenced; in addition, a large number of fin structures are arranged in the device, coal gas flows in a labyrinth mode in the heat exchanger, and the resistance of the device is high.

In view of the above, the inventor designs an indirect heat exchange cooler for converter gas through repeated experiments according to production design experiences in the field and related fields for many years, so as to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a converter gas indirect heat exchange cooler which can effectively ensure the heat exchange efficiency and the service life of a heat exchanger.

In order to achieve the purpose, the invention provides a converter gas indirect heat exchange cooler which at least comprises a shell, a water inlet tank, a water return tank, a cleaning device and at least one heat exchange pipe set, wherein the shell is hollow and forms a heat exchange cavity, the heat exchange cavity is provided with an air inlet and an air outlet, the heat exchange pipe set is arranged in the heat exchange cavity, the heat exchange pipe set comprises a plurality of heat exchange pipes which are arranged in parallel, two ends of each heat exchange pipe respectively penetrate through the outer wall of the shell in a sealing mode, the water inlet tank and the water return tank are respectively arranged outside the shell, one end of each heat exchange pipe is communicated with the water inlet tank, the other end of each heat exchange pipe is communicated with the water return tank, and the cleaning device is arranged in the heat exchange cavity and can spray cleaning water to the outer wall of each heat exchange pipe.

The converter gas indirect heat exchange cooler comprises a cleaning main pipe, a plurality of cleaning branch pipes and a plurality of cleaning nozzles, wherein the cleaning branch pipes are connected to the cleaning main pipe in parallel, and each cleaning branch pipe is provided with a plurality of cleaning nozzles.

The converter gas indirect heat exchange cooler is characterized in that each heat exchange tube is U-shaped, each heat exchange tube comprises a first straight tube section, an arc-shaped bent tube section and a second straight tube section which are sequentially arranged, the first straight tube section and the second straight tube section are horizontally arranged, the first straight tube section penetrates through the outer wall of the shell in a sealing mode and is connected with the water inlet tank, and the second straight tube section penetrates through the outer wall of the shell in a sealing mode and is connected with the water return tank.

The indirect converter gas heat exchange cooler is characterized in that the cleaning main pipe and each cleaning branch pipe are respectively arranged horizontally, a plurality of water distribution holes are formed in the outer wall of the cleaning main pipe along the length direction of the cleaning main pipe, the cleaning branch pipes are connected to the outside of the water distribution holes in a one-to-one correspondence manner, a plurality of water spray nozzles are respectively formed in the outer wall of each cleaning branch pipe, and the cleaning nozzles are correspondingly arranged outside the water spray nozzles in a one-to-one correspondence manner.

The converter gas indirect heat exchange cooler is characterized in that the heat exchange tubes are fluoroplastic heat exchange tubes.

The converter gas indirect heat exchange cooler as described above, wherein the converter gas indirect heat exchange cooler further comprises a sewage collecting cylinder, the sewage collecting cylinder has a cylinder body, the cylinder body is arranged below the casing and is fixedly connected with the casing, an accommodating cavity with an upward opening is arranged in the cylinder body, and the accommodating cavity is communicated with the heat exchange cavity and is used for collecting sewage generated by the cleaning device.

The indirect heat exchange cooler for converter gas comprises a shell, a gas inlet, a gas outlet and a containing cavity, wherein the gas inlet is arranged at the bottom end of the shell, the gas outlet is arranged at the top end of the shell, and the containing cavity is communicated with the heat exchange cavity through the gas inlet.

The converter gas indirect heat exchange cooler as described above, wherein the converter gas indirect heat exchange cooler further comprises an air inlet pipeline, and the air inlet pipeline is connected with the sewage collecting cylinder.

The indirect heat exchange cooler for converter gas comprises a converter gas collecting barrel, a containing cavity, a sewage collecting hopper, a sewage discharging pipe, a sewage collecting cavity, a cylinder body and a water collecting pipe, wherein the sewage collecting hopper and the sewage discharging pipe are arranged in the containing cavity, the outer edge of the top of the sewage collecting hopper is fixedly connected with the inner wall of the cylinder body in a sealing mode, the sewage collecting hopper is provided with the sewage collecting cavity with an upward opening, the sewage discharging pipe is arranged below the sewage collecting hopper, one end of the sewage discharging pipe is connected with the sewage collecting hopper, and the other end of the sewage discharging pipe penetrates through the outer wall of the cylinder body in a sealing mode.

The indirect heat exchange cooler for converter gas comprises a heat exchange cavity, a heat exchange pipe group, a heat exchange pipe and an air inlet, wherein the heat exchange cavity is internally provided with an air flow distribution plate, the air flow distribution plate is arranged between the air inlet and the heat exchange pipe group, and the air flow distribution plate is provided with a plurality of through holes allowing air flow to pass through.

Compared with the prior art, the invention has the following characteristics and advantages:

the indirect heat exchange cooler for the converter gas, provided by the invention, is provided with the cleaning device, the cleaning device can regularly spray cleaning water to the heat exchange tube group at the smelting interval of the converter, and the cleaning water can timely clean off dust accumulated on the outer wall of the heat exchange tube so as to ensure that the outer wall of the heat exchange tube is in a smooth state, reduce the influence of the dust on the heat exchange efficiency of the heat exchange tube and ensure that the whole heat exchanger is in an optimal working state.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may effect this invention by selecting various possible shapes and proportional dimensions as appropriate.

FIG. 1 is a schematic structural diagram of a converter gas indirect heat exchange cooler provided by the invention;

FIG. 2 is a side view of the indirect heat exchange cooler for converter gas according to the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 6 is a partial enlarged view of the gas flow distribution plate according to the present invention;

fig. 7 is a schematic structural view of the heat exchange tube set of the present invention.

Description of reference numerals:

100. a converter gas indirect heat exchange cooler; 10. A housing;

11. a heat exchange cavity; 12. An air inlet;

13. an air outlet; 20. A water inlet tank;

21. a water inlet cavity; 30. Returning to a water tank;

31. a water return cavity; 40. A heat exchange tube set;

41. a heat exchange pipe; 411. A first straight pipe section;

412. bending the pipe section in an arc manner; 413. A second straight tube section;

50. a cleaning device;

51. cleaning a main pipe; 52. Cleaning the branch pipe;

53. cleaning the nozzle; 60. An air flow uniform distribution plate;

61. a through hole; 70. A sewage collection cylinder;

71. a cylinder body; 72. An accommodating cavity;

721. a diameter-changing section; 722. An air inlet section;

723. a sewage collection section; 73. A sewage collecting hopper;

74. a sewage discharge pipe; 80. An air intake duct;

90. an air outlet pipeline.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and should not be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.

As shown in fig. 1 to 7, the present invention provides an indirect heat exchange cooler 100 for converter gas, where the indirect heat exchange cooler 100 for converter gas at least includes a casing 10, a water inlet tank 20, a water return tank 30, a cleaning device 50, and at least one heat exchange tube set 40, the casing 10 is hollow and forms a heat exchange cavity 11, the heat exchange cavity 11 has an air inlet 12 and an air outlet 13, the heat exchange tube set 40 is disposed in the heat exchange cavity 11, the heat exchange tube set 40 includes a plurality of heat exchange tubes 41 disposed in parallel, two ends of each heat exchange tube 41 respectively penetrate through an outer wall of the casing 10 in a sealing manner, the water inlet tank 20 and the water return tank 30 are respectively disposed outside the casing 10, one end of each heat exchange tube 41 is connected to the water inlet tank 20, the other end of each heat exchange tube 41 is connected to the water return tank 30, and the cleaning device 50 is disposed in the heat exchange cavity 11 and can spray cleaning water to the outer wall of each heat exchange tube 41.

The converter gas indirect heat exchange cooler 100 provided by the invention is provided with the cleaning device 50, the cleaning device 50 can regularly spray cleaning water to the heat exchange tube group 40 at the converter smelting interval, and the cleaning water can timely clean dust accumulated on the outer wall of the heat exchange tube 41 so as to ensure that the outer wall of the heat exchange tube 41 is in a smooth state, reduce the influence of the dust on the heat exchange efficiency of the heat exchange tube 41 and ensure that the whole heat exchanger is in an optimal working state.

The converter gas indirect heat exchange cooler 100 provided by the invention ensures that the converter gas indirect heat exchange cooler 100 has good service life, convenient maintenance and lower resistance loss while efficiently and indirectly cooling the converter gas.

The cleaning water sprayed to the heat exchange tube group 40 by the cleaning device 50 of the converter gas indirect heat exchange cooler 100 provided by the invention is only used for cleaning the heat exchange tubes 41, the water consumption is less, the cleaning time of the heat exchange tube group 40 by the cleaning device 50 can be selected to be carried out at the converter smelting intermittence, the gas heat exchange is carried out after the cleaning is finished, the influence on the gas humidity is very small, the moisture content of the gas is hardly increased, the cooled gas is still in an unsaturated state, and the adverse effect on a gas recovery pipeline and a valve in the subsequent process is avoided.

The converter gas indirect heat exchange cooler 100 provided by the invention adopts an indirect heat exchange technology, and can reduce the temperature of converter gas from 150 ℃ to 70 ℃.

The indirect heat exchange cooler 100 for converter gas provided by the invention has the advantages of simple and reliable equipment and high heat exchange efficiency, can prolong the service life of a gas pipeline while reducing the temperature of the gas, and realizes the recovery of full-dry converter gas.

In an alternative embodiment of the present invention, each heat exchange tube 41 has a U-shape, each heat exchange tube 41 includes a first straight tube section 411, an arc-shaped bent tube section 412 and a second straight tube section 413 which are sequentially arranged, each of the first straight tube section 411 and the second straight tube section 413 is horizontally arranged, the first straight tube section 411 is connected to the water inlet tank 20 by penetrating through the outer wall of the housing 10 in a sealing manner, and the second straight tube section 413 is connected to the water return tank 30 by penetrating through the outer wall of the housing 10 in a sealing manner.

In an alternative example of this embodiment, the first straight pipe section 411 is located below the second straight pipe section 413, and accordingly, the water inlet tank 20 is located below the water return tank 30.

In an alternative example of this embodiment, the water inlet tank 20 and the water return tank 30 are fixedly connected to the outer wall of the housing 10, respectively.

In an alternative example of this embodiment, the water inlet tank 20 is connected to an external water source through a water inlet pipe, and the water inlet tank 20 is hollow to form a water inlet chamber 21, and the water return tank 30 discharges cooling water through a water return pipe, and the water return tank 30 is hollow to form a water return chamber 31. The cooling water provided by the external water source flows into the water inlet cavity 21 through the water inlet pipe and is uniformly distributed into the heat exchange pipes 41 through the water inlet cavity 21, the cooling water in each heat exchange pipe 41 exchanges heat with the high-temperature coal gas in the heat exchange cavity 11, the temperature of the coal gas is reduced, the temperature of the cooling water is increased to form hot water, and the heated hot water flows into the water return cavity 31 to be collected and then is discharged in a centralized manner.

In an alternative embodiment of the present invention, a single, two or more heat exchange tube sets 40 may be disposed in the heat exchange chamber 11, and the number of the heat exchange tube sets 40 may be determined by those skilled in the art according to the total heat exchange amount and the appearance of the casing 10.

In an alternative example of this embodiment, each heat exchange tube set 40 in the heat exchange chamber 11 is arranged in a modular manner, which is flexible and convenient.

In an alternative example, the heat exchange chamber 11 is a rectangular chamber, and the outer contour of each heat exchange tube set 40 is rectangular, so that a plurality of heat exchange tube sets 40 can be arranged and installed in a modular manner.

In an alternative embodiment of the present invention, a heat exchange tube frame for supporting each heat exchange tube 41 is further disposed in the heat exchange chamber 11, so as to ensure that each heat exchange tube 41 is orderly and stably arranged in the heat exchange chamber 11.

In an alternative embodiment of the present invention, the heat exchange tube 41 is a fluoroplastic heat exchange tube. The fluoroplastic heat exchange tube has good heat exchange efficiency and good corrosion resistance, and overcomes the defect of poor corrosion resistance of the traditional metal heat exchanger. Of course, the heat exchange tube 41 is made of other corrosion-resistant materials, and those skilled in the art can select other corrosion-resistant materials such as stainless steel, copper tube, PP tube, etc. by considering the corrosion resistance, temperature resistance, non-dust adhesion, high strength, etc. of the materials.

In an optional example of this embodiment, the heat exchange tube 41 is a thin-walled tube (fluoroplastic heat exchange tube) with a small diameter, and the specification is usually phi 10x0.5mm, so as to integrally improve the heat exchange performance of the heat exchange tube set 40; meanwhile, the heat exchange tubes 41 have the same diameter and are closely arranged, and the heat exchange coefficient of the heat exchange tube group 40 can reach more than 2 times of that of the traditional metal finned tube heat exchanger, so that the good heat exchange effect on the converter gas is further ensured.

In an alternative embodiment of the present invention, the washing apparatus 50 includes a washing header pipe 51, a plurality of washing branch pipes 52, and a plurality of washing nozzles 53, the plurality of washing branch pipes 52 are connected to the washing header pipe 51, respectively, and the plurality of washing nozzles 53 are installed on each washing branch pipe 52.

In an optional example of this embodiment, the cleaning device 50 is disposed above the heat exchange tube set 40, the cleaning main pipe 51 and each cleaning branch pipe 52 are respectively disposed horizontally, a plurality of water distribution holes are formed in the outer wall of the cleaning main pipe 51 along the length direction of the cleaning main pipe 51, the plurality of cleaning branch pipes 52 are connected to the outside of the plurality of water distribution holes in a one-to-one correspondence manner, a plurality of water spray nozzles are respectively formed in the outer wall of each cleaning branch pipe 52, and the plurality of cleaning nozzles 53 are correspondingly installed at the plurality of water spray nozzles in a one-to-one correspondence manner.

In an alternative example, one end of the cleaning main pipe 51 penetrates through the outer wall of the casing 10 in a sealing manner and is connected with an external cleaning water source, the cleaning water firstly flows into each cleaning branch pipe 52 through the cleaning main pipe 51 and then is sprayed out from a plurality of cleaning nozzles 53 on each cleaning branch pipe 52, and the sprayed cleaning water cleans dust on the outer wall of each heat exchange pipe 41, so that the surface of the outer wall of each heat exchange pipe 41 is smooth, accumulation and scaling of the dust are avoided, the influence of the dust accumulated outside the heat exchange pipe 41 on the heat exchange efficiency is reduced, and the heat exchange pipe 41 is ensured to have high heat exchange efficiency all the time.

In an alternative embodiment of the present invention, the indirect heat exchange cooler 100 for converter gas further includes a sewage collecting cylinder 70, the sewage collecting cylinder 70 has a cylinder 71, the cylinder 71 is disposed below the casing 10 and is fixedly connected to the casing 10, an accommodating cavity 72 with an upward opening is disposed in the cylinder 71, and the accommodating cavity 72 is communicated with the heat exchange cavity 11 and is used for collecting sewage generated by cleaning. With the structure, after the cleaning device 50 cleans the heat exchange tube set 40, the sewage generated by cleaning can be discharged from the heat exchange cavity 11 in time and recycled by the sewage collecting cylinder 70, thereby further reducing the influence of the cleaning operation on the gas humidity.

In an optional example of this embodiment, the sewage collecting cylinder 70 further includes a sewage collecting hopper 73 and a sewage draining pipe 74, the sewage collecting hopper 73 and the sewage draining pipe 74 are both disposed in the accommodating cavity 72, an outer edge of the top of the sewage collecting hopper 73 is fixedly connected to the inner wall of the cylinder 71 in a sealing manner, the sewage collecting hopper 73 has a sewage collecting cavity with an upward opening, the sewage collecting cavity is in an inverted cone shape that gradually reduces in diameter from top to bottom, the sewage draining pipe 74 is disposed below the sewage collecting hopper 73, one end of the sewage draining pipe 74 is connected to the sewage collecting hopper 73, and the other end of the sewage draining pipe 74 penetrates through the outer wall of the cylinder 71 in a sealing manner. By adopting the structure, the sewage collecting cavity is pre-stored with water with a certain height, which plays a role of water sealing for coal gas, and meanwhile, the sewage collecting cavity can also collect dust-containing water in the cleaning process and then regularly discharge the dust-containing water through the sewage discharge pipe 74.

In an alternative example, the air inlet 12 is disposed at the bottom end of the casing 10, the air outlet 13 is disposed at the top end of the casing 10, and the accommodating chamber 72 is communicated with the heat exchange chamber 11 through the air inlet 12. With the above structure, the air inlet 12 has both air intake and water discharge functions, thereby avoiding secondary hole opening on the housing 10, and facilitating to ensure the strength and sealing performance of the housing 10.

In an alternative example, the converter gas indirect heat exchange cooler 100 further comprises an air inlet pipeline 80, and the air inlet pipeline 80 is connected with the sewage collecting cylinder 70. The air inlet pipeline 80 is used for conveying high-temperature coal gas to be treated (to be heat-exchanged), and the high-temperature coal gas flows through the air inlet pipeline 80, the accommodating cavity 72 and the air inlet 12 and then enters the heat exchange cavity 11 to exchange heat with cooling water in the heat exchange tube group 40.

In an alternative example, one end of the air inlet pipe 80 is sealed through the outer wall of the cylinder 71 and extends into the accommodating cavity 72.

Further, the end of the air inlet pipe 80 extending into the accommodating cavity 72 is bent downward to prevent the sewage discharged from the air inlet 12 from entering the air inlet pipe 80, so as to ensure the normal operation of the air inlet pipe 80.

Preferably, the gas inlet tube 80 is a circular tube, so as to ensure that the gas in the tube cannot flow uniformly.

In an optional example, the accommodating cavity 72 includes a reducing section 721, an air inlet section 722 and a sewage collecting section 723 sequentially arranged from top to bottom, the shape of the cross section of the reducing section 721 gradually changes from circular to square along the direction from bottom to top, the air inlet pipe 80 is connected to the air inlet section 722, and the sewage collecting hopper 73 and the sewage discharge pipe 74 are arranged in the sewage collecting section 723.

In an alternative embodiment of the present invention, an air distribution plate 60 is further disposed in the heat exchange cavity 11, and the air distribution plate 60 is disposed between the air inlet 12 and the heat exchange tube sets 40, so as to make the air entering from the air inlet 12 uniformly flow through each heat exchange tube set 40, and further ensure the heat exchange efficiency.

In an alternative example of this embodiment, the air distribution plate 60 is disposed parallel to each heat exchange tube 41, the outer edge of the air distribution plate 60 is hermetically connected to the inner wall of the casing 10, and the air distribution plate 60 is provided with a plurality of through holes 61 for allowing the air to pass through.

In an alternative example, the through holes 61 are square holes, and the specific size, number and arrangement of the through holes 61 can be determined by those skilled in the art according to actual needs.

In an alternative embodiment of the present invention, the indirect heat exchange cooler 100 for converter gas further comprises an air outlet pipe 90, the air outlet pipe 90 is disposed above the housing 10 and connected to the air outlet 13, and the air outlet pipe 90 is used for guiding the cooled gas out of the heat exchange chamber 11.

In an alternative example of this embodiment, the shape of the cross section of the outlet pipe 90 gradually changes from a square shape to a circular shape in the direction from bottom to top.

In an alternative example of this embodiment, the outlet conduit 90 is connected to a gas cabinet through which converter gas that has passed through cooling is discharged and passed to a subsequent gas cabinet.

In an alternative embodiment of the present invention, the converter gas indirect heat exchange cooler 100 further comprises a base, which is located at the bottom of the sewage collecting cylinder 70 and is used for supporting the whole converter gas indirect heat exchange cooler 100.

Referring to fig. 1 to fig. 7, a detailed description will be given of a specific implementation process of the indirect heat exchange cooler 100 for converter gas according to an embodiment of the present invention:

the converter gas with the front end dedusting temperature of about 150 ℃ enters the sewage collecting cylinder 70 through the gas inlet pipeline 80;

coal gas enters the heat exchange cavity 11 upwards along the gas inlet section 722 through the reducer section 721;

in the heat exchange cavity 11, the coal gas firstly passes through the air flow uniform distribution plate 60, is uniformly guided and then contacts the outer walls of a plurality of heat exchange tubes 41 contained in the heat exchange tube group 40, and because cooling water is arranged in the heat exchange tube group 40, the heat of the high-temperature coal gas is transferred to low-temperature cooling water, so that the purpose of reducing the temperature of the coal gas is achieved, and the quantity and the cooling water quantity of the heat exchange tube group 40 are determined according to the coal gas quantity and the coal gas cooling temperature (generally 70 ℃ required by a coal gas cabinet);

cooling water is distributed to a plurality of heat exchange pipes 41 in the heat exchange pipe group 40 by the water inlet tank 20, and hot water heated by absorbing coal gas heat is collected to the water return tank 30 and then is uniformly discharged;

the indirectly cooled qualified gas is discharged from the cooler through the gas outlet pipe 90;

after the heat exchange tube set 40 works for a certain time, the heat exchange tube set 40 needs to be washed due to accumulation of dust in coal gas, at the moment, the washing device 50 is opened, washing water is distributed to the washing branch tubes 52 through the washing main tube 51 until the washing nozzles 53, the outer walls of all the heat exchange tubes 41 are effectively washed, the washing device 50 is closed after washing is finished, and the heat exchange tube set 40 can continue to work normally; because the converter smelting is periodic, the coal gas entering the cooler is also discontinuous, the working time of the cleaning device 50 is set as the smelting intermittent period, the washing frequency can be set to be cleaned once every 30-40 smelting periods, and the cleaning frequency can be adjusted appropriately according to the situation.

The sewage collecting hopper 73 stores water with a certain liquid level for a long time, plays a role of sealing coal gas, simultaneously collects sewage generated by washing the heat exchange tube 41 by the cleaning device 50, and periodically discharges the sewage out of the cooler through the sewage discharge tube 74.

The present invention is not limited to the above embodiments, and in particular, various features described in different embodiments can be arbitrarily combined with each other to form other embodiments, and the features are understood to be applicable to any embodiment except the explicitly opposite descriptions, and are not limited to the described embodiments.

Claims (10)

1. The converter gas indirect heat exchange cooler is characterized by at least comprising a shell, a water inlet tank, a water return tank, a cleaning device and at least one heat exchange tube set, wherein the shell is hollow and forms a heat exchange cavity, the heat exchange cavity is provided with an air inlet and an air outlet, the heat exchange tube set is arranged in the heat exchange cavity, the heat exchange tube set comprises a plurality of heat exchange tubes which are connected in parallel, two ends of each heat exchange tube respectively penetrate through the outer wall of the shell in a sealing mode, the water inlet tank and the water return tank are respectively arranged outside the shell, one end of each heat exchange tube is communicated with the water inlet tank, the other end of each heat exchange tube is communicated with the water return tank, and the cleaning device is arranged in the heat exchange cavity and can spray cleaning water to the outer wall of each heat exchange tube.

2. The indirect converter gas heat exchange cooler of claim 1, wherein the cleaning device comprises a cleaning main pipe, a plurality of cleaning branch pipes and a plurality of cleaning nozzles, the plurality of cleaning branch pipes are connected to the cleaning main pipe in parallel, and the plurality of cleaning nozzles are installed on each cleaning branch pipe.

3. The indirect heat exchange cooler for converter gas as claimed in claim 2, wherein each heat exchange tube is U-shaped, and comprises a first straight tube section, an arc-shaped bent tube section and a second straight tube section which are sequentially arranged, the first straight tube section and the second straight tube section are both horizontally arranged, the first straight tube section hermetically penetrates through the outer wall of the shell and is connected with the water inlet tank, and the second straight tube section hermetically penetrates through the outer wall of the shell and is connected with the water return tank.

4. The indirect converter gas heat exchange cooler of claim 3, wherein the cleaning main pipe and each cleaning branch pipe are horizontally arranged, a plurality of water distribution holes are formed in the outer wall of the cleaning main pipe along the length direction of the cleaning main pipe, the cleaning branch pipes are connected to the outside of the water distribution holes in a one-to-one correspondence manner, a plurality of water spray nozzles are formed in the outer wall of each cleaning branch pipe, and the cleaning nozzles are correspondingly installed outside the water spray nozzles in a one-to-one correspondence manner.

5. The indirect heat exchange cooler for converter gas according to any one of claims 1 to 4, wherein each heat exchange tube is a fluoroplastic heat exchange tube.

6. The indirect heat exchange cooler for converter gas as claimed in claim 1, further comprising a waste water collecting barrel, wherein the waste water collecting barrel has a barrel body, the barrel body is disposed below the casing and is fixedly connected with the casing, an accommodating cavity with an upward opening is formed in the barrel body, and the accommodating cavity is communicated with the heat exchange cavity and is used for collecting waste water generated by the cleaning device.

7. The indirect heat exchange cooler for converter gas as recited in claim 6, wherein said gas inlet is disposed at a bottom end of said housing, said gas outlet is disposed at a top end of said housing, and said receiving chamber is in communication with said heat exchange chamber through said gas inlet.

8. The indirect heat exchange cooler for converter gas of claim 7, further comprising an air inlet pipe, wherein the air inlet pipe is connected with the sewage collecting cylinder.

9. The converter gas indirect heat exchange cooler according to any one of claims 6 to 8, wherein the sewage collecting cylinder further comprises a sewage collecting hopper and a sewage pipe, the sewage collecting hopper and the sewage pipe are both arranged in the accommodating cavity, the outer edge of the top of the sewage collecting hopper is fixedly connected with the inner wall of the cylinder in a sealing manner, the sewage collecting hopper is provided with a sewage collecting cavity with an upward opening, the sewage pipe is arranged below the sewage collecting hopper, one end of the sewage pipe is connected with the sewage collecting hopper, and the other end of the sewage pipe penetrates through the outer wall of the cylinder in a sealing manner.

10. The indirect heat exchange cooler for converter gas according to claim 1, wherein an air distribution plate is further disposed in the heat exchange cavity, the air distribution plate is disposed between the air inlet and the heat exchange tube set, and a plurality of through holes allowing air to pass through are formed in the air distribution plate.

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