Blast furnace gas biological desulfurization equipment and desulfurization system

Abstract

The present application relates to the technical field of coal gas desulfurization, and provides a blast furnace gas biological desulfurization equipment and a desulfurization system, which comprises a biological filler area, a spraying assembly and a dehydration assembly, so that the whole process of blast furnace gas desulfurization is carried out in a humid environment, thereby avoiding the risk of deflagration caused by the mixing of combustible gas in blast furnace gas and air, and the sulfides in blast furnace gas are oxidized by using the characteristics of desulfurization bacteria in the biological filler area, so that the treatment process is mild, the spraying assembly utilizes the principle that gas flows upward and water solution flows downward, blast furnace gas is in opposite contact with the nutrient solution sprayed by the spraying assembly, on the one hand, elemental sulfur and some impurities in blast furnace gas are removed, and on the other hand, nutrients are provided for the desulfurization bacteria in the biological filler area, and the overall equipment has the advantages of high practicability, mild treatment process and high-efficiency desulfurization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gas desulfurization, and particularly relates to a blast furnace coal gas biological desulfurization equipment and a desulfurization system. BACKGROUND

[0002] The blast furnace coal gas is a combustible byproduct obtained in the process of blast furnace ironmaking, and is the main fuel of hot blast stoves and heating furnaces at home and abroad. After dust removal and TRT residual pressure power generation, most of the blast furnace coal gas is sent to hot blast stoves, heating furnaces and the like as fuel, and the sulfides in the blast furnace coal gas will make the flue gas of hot blast stoves, heating furnaces and the like exceed the standard.

[0003] At present, the blast furnace coal gas sulfide desulfurization often adopts the method of placing multiple layers of sulfide adsorption materials in a tower type device, and the blast furnace coal gas enters the desulfurization tower to reduce the sulfide content in the blast furnace coal gas through the adsorption materials.

[0004] However, the blast furnace coal gas has large flow and low pressure, and the composition is complex, and when passing through the multiple layers of adsorption materials in the tower, the airflow is not smooth and easy to be blocked, which leads to large pressure drop of the whole gas supply gas path, affects the desulfurization effect, although some manufacturers use air pressurization, although the purpose of the passage is achieved, but there is a risk of deflagration due to the mixing of combustible gas and particulate matter in the coal gas and air. SUMMARY

[0005] Therefore, the present application provides a blast furnace coal gas biological desulfurization equipment and a desulfurization system to solve the problem of poor desulfurization effect caused by the structure of the existing desulfurization tower.

[0006] The first aspect of the present application provides a blast furnace coal gas biological desulfurization equipment, which comprises a main tank body, and a biological filler area, a spray assembly, a dehydration assembly and a gas outlet pipeline are sequentially arranged in the main tank body from bottom to top.

[0007] An air inlet assembly is arranged in the main tank body and used for supplying coal gas into the main tank body.

[0008] The biological filler area contains desulfurization bacteria to perform oxidation reaction with sulfides in the coal gas.

[0009] The spray assembly is used for washing the product after the oxidation reaction in the biological filler area.

[0010] The dehydration assembly is used for dehydrating the coal gas after the oxidation reaction.

[0011] The gas outlet pipeline is arranged at the top of the main tank body and used for connecting the main tank body with an external pipeline.

[0012] The blast furnace coal gas biological desulfurization equipment provided by the present application comprises a plurality of filler layers arranged at intervals in the biological filler area, and each filler layer comprises:

[0013] The filler support plate is a continuous bending structure, and a plurality of water holes are uniformly distributed on the filler support plate.

[0014] A liquid redistributor is arranged on the filler support plate and used for uniformly distributing the liquid flowing through the filler support plate.

[0015] The spray assembly comprises:

[0016] The spray pipeline comprises a spray main pipe and a plurality of spray branch pipes, the plurality of spray branch pipes are uniformly connected to the spray main pipe, and a plurality of water holes are uniformly distributed on the plurality of spray branch pipes.

[0017] The flushing pipeline is arranged above the spray pipeline, and the flushing pipeline comprises a flushing main pipe and a plurality of flushing branch pipes, the plurality of flushing branch pipes are uniformly connected to the flushing main pipe, and a plurality of air holes are uniformly distributed on the plurality of flushing branch pipes.

[0018] The dehydration assembly comprises a plurality of dehydration components arranged in an up-down mode, each of the dehydration components comprises a dehydrator and a blowing pipeline, the dehydrator is used for dehydrating the oxidized gas, and the blowing pipeline is used for blowing and scaling the dehydrator.

[0019] The dehydrator comprises:

[0020] A center plate;

[0021] An outer shell body is sealingly connected to the inner wall of the main tank body.

[0022] A plurality of fan leaves are arranged in a circumferential mode between the center plate and the outer shell body, the rotation directions of the plurality of fan leaves are all towards the center direction of the main tank body, and the rotation direction angles are greater than 0°.

[0023] The blowing pipeline comprises a blowing main pipe and a plurality of blowing branch pipes, the plurality of blowing branch pipes are uniformly connected to the blowing main pipe, and a plurality of spray heads are uniformly connected to the plurality of blowing branch pipes.

[0024] The main tank body further comprises:

[0025] A liquid storage area is arranged below the gas inlet assembly, the liquid storage area is used for storing the desulfurization liquid produced after the biological filler area is washed by the spray assembly, and the bottom of the liquid storage area is connected to a liquid discharge pipeline.

[0026] The blast furnace gas biological desulfurization equipment provided by the present application is characterized in that a sludge discharge pipeline is connected to the liquid discharge pipeline, and a jet sludge discharger is arranged on the sludge discharge pipeline.

[0027] The blast furnace gas biological desulfurization equipment provided by the present application is characterized in that the gas inlet assembly comprises a gas inlet main pipeline and a plurality of gas inlet branch pipelines, the gas inlet branch pipelines are uniformly connected to the gas inlet main pipeline, and a plurality of gas inlet holes are arranged on the gas inlet branch pipelines.

[0028] The second aspect of the present application provides a desulfurization system comprising the blast furnace gas biological desulfurization equipment as described above.

[0029] The blast furnace gas biological desulfurization equipment provided by the present application is characterized in that a main tank body is provided, and an air inlet assembly, a biological filler area, a spraying assembly, a dehydration assembly and an air outlet pipeline are sequentially arranged in the main tank body from bottom to top. By arranging the biological filler area, the spraying assembly and the dehydration assembly in the main tank body, the whole process of the blast furnace gas desulfurization is carried out in a humid environment, thereby avoiding the risk of deflagration caused by the mixing of combustible gas in the blast furnace gas and air. In the biological filler area, the sulfides in the blast furnace gas are oxidized by using the characteristics of desulfurization bacteria, and the treatment process is mild without the use of adsorption materials, the addition of a large amount of reagents, and the problem of blast furnace gas path disorder caused by the blockage of adsorption materials. According to the principle that gas flows upward and water solution flows downward, the blast furnace gas and the nutrient solution sprayed by the spraying assembly are in opposite contact, which removes elemental sulfur and some impurities in the blast furnace gas on one hand, and provides nutrients for the desulfurization bacteria in the biological filler area on the other hand. The overall equipment has the advantages of high practicability, mild treatment process and high efficiency of desulfurization. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0031] Figure 1 is the overall schematic diagram of the blast furnace gas biological desulfurization equipment in the embodiment of the present application;

[0032] Figure 2 is the sectional structure schematic diagram of the filler support plate in the embodiment of the present application;

[0033] Figure 3 is the opening structure schematic diagram of the filler support plate in the embodiment of the present application;

[0034] Figure 4 is the structure schematic diagram of the spraying pipeline in the embodiment of the present application;

[0035] Figure 5 is a structure diagram of the flushing pipeline in the embodiment of the present application;

[0036] Figure 6 is a structure diagram of the dehydrator in the embodiment of the present application;

[0037] Figure 7 is a structure diagram of the purging pipeline in the embodiment of the present application;

[0038] Figure 8 is a structure diagram of the air inlet assembly in the embodiment of the present application.

[0039] Reference signs:

[0040] 1, main tank body;

[0041] 2, air inlet assembly; 21, air inlet main pipe; 22, air inlet branch pipe;

[0042] 3, biological filler area; 31, filler layer; 32, filler support plate;

[0043] 4, spraying assembly; 41, spraying main pipe; 42, spraying branch pipe; 43, flushing main pipe; 44, flushing branch pipe;

[0044] 5, dehydration assembly; 51, dehydrator; 511, center plate; 512, outer shell; 513, fan blade; 52, purging pipeline; 521, purging main pipe; 522, purging branch pipe;

[0045] 6, air outlet pipeline;

[0046] 7, liquid storage area; 71, liquid discharge pipeline; 72, sludge discharge pipeline. DETAILED DESCRIPTION

[0047] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0048] In the description of the present application, it should be understood that the terms "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, 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 therefore cannot be understood as a limitation on the present application.

[0049] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can include one or more of such features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is two or more, unless explicitly specified otherwise.

[0050] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and examples.

[0051] Blast furnace gas is a combustible by-product obtained in the process of blast furnace ironmaking, and is the main fuel for hot blast stoves and heating furnaces at home and abroad. After dust removal and TRT residual pressure power generation, most of the blast furnace gas is sent to hot blast stoves, heating furnaces and the like for use as fuel, and sulfides in the blast furnace gas can cause flue gas emissions of hot blast stoves, heating furnaces and the like to exceed the standard.

[0052] At present, desulfurization of sulfides in blast furnace gas often uses a plurality of sulfide adsorption materials placed in a tower type device, and the blast furnace gas enters the desulfurization tower to reduce the content of sulfides in the blast furnace gas through the adsorption materials.

[0053] However, the blast furnace gas has large flow rate, low pressure and complex composition, and when passing through the plurality of adsorption materials in the tower, problems such as airflow disorder, large resistance and easy plugging can occur, resulting in large pressure drop of the entire gas supply path and affecting the desulfurization effect. Although some manufacturers use air pressurization, although the purpose of the passage is achieved, there is a risk of deflagration due to the mixing of combustible gases and particulate matters in the gas with air.

[0054] The blast furnace gas biological desulfurization equipment in the embodiment of the present application has the advantages that the blast furnace gas full-process desulfurization is carried out in a humid environment by arranging a biological filler area, a spraying assembly and a dehydration assembly in the main tank body, the risk of deflagration due to the mixing of combustible gases in the blast furnace gas with air is avoided, the sulfides in the blast furnace gas are oxidized by using the characteristics of desulfurization bacteria in the biological filler area, the treatment process is mild, and adsorption materials are not needed, a large amount of reagent does not need to be added, and the problem of blast furnace gas path disorder caused by plugging of the adsorption materials does not occur, the blast furnace gas and the nutrient solution sprayed by the spraying assembly are in opposite contact by using the principle that gas goes upward and water solution flows downward, elemental sulfur and some impurities in the blast furnace gas are removed on one hand, and the desulfurization bacteria in the biological filler area are provided with nutrients on the other hand, and the overall equipment has the advantages of strong practicability, mild treatment process and high-efficiency desulfurization.

[0055] For example, Figures 1 to 8As shown, the blast furnace gas biological desulfurization equipment provided by the embodiment of the present application comprises a main tank body 1, the inside of the main tank body 1 is sequentially provided with an air inlet assembly 2, a biological filler area 3, a spraying assembly 4, a dehydration assembly 5 and an air outlet pipeline from bottom to top, the air inlet assembly 2 is used for supplying the blast furnace gas into the main tank body 1, the biological filler area 3 contains desulfurization bacteria to perform oxidation reaction with sulfides in the blast furnace gas, the spraying assembly 4 is used for flushing the product after oxidation reaction of the biological filler area 3, the dehydration assembly 5 is used for dehydrating the blast furnace gas after oxidation, and the air outlet pipeline is arranged at the top of the main tank body 1 and is used for connecting the main tank body 1 with an external pipeline.

[0056] Specifically, the desulfurization bacteria used in the biological filler area 3 is suitable for the atmosphere of the blast furnace gas, the desulfurization bacteria is autotrophic bacteria, the survival temperature is 2-75°, the optimal growth temperature is 25-55℃, the pH = 6.0-7.8 is the most suitable for the growth and reproduction of the desulfurization bacteria, the desulfurization bacteria can use different sulfides as substrates to obtain energy through oxidation, the growth energy is obtained in the process of oxidizing the sulfides, the sulfides in the blast furnace gas are oxidized to elemental sulfur under the oxidation of the desulfurization bacteria, and the filler in the biological filler area 3 is made of high-strength, corrosion-resistant and high-temperature-resistant material and is suitable for the growth of the desulfurization bacteria.

[0057] On one hand, the water solution sprayed by the spraying assembly 4 is nutrient solution suitable for the growth and reproduction of the desulfurization bacteria after nutrient adjustment, the desulfurization bacteria always maintains a wet state after the spraying of the nutrient solution, the sulfides in the blast furnace gas are better oxidized and absorbed, and the desulfurization effect of the biological filler area 3 is improved; on the other hand, the elemental sulfur and some dead desulfurization bacteria after oxidation of the blast furnace gas are flushed away by the water solution and fall to the bottom of the main tank body 1 to form desulfurization liquid under the action of the water solution, the desulfurization liquid plays a water sealing role on the tank body, and the coal gas breakdown accident is avoided.

[0058] The dehydration assembly 5 can use a wire mesh mist eliminator or a vane type mist eliminator, as long as a device capable of removing liquid droplets carried in the blast furnace gas can be used, and the embodiment is not limited.

[0059] The blast furnace gas to be treated enters the lower part of the main tank body 1, flows upwards through the biological filler area 3, the sulfides contained in the blast furnace gas are oxidized to elemental sulfur by the desulfurization bacteria in the biological filler area 3, the elemental sulfur and the dead desulfurization bacteria are flushed to the bottom of the tank to form desulfurization liquid after the flushing of the spraying water of the spraying assembly 4 above the biological filler area 3, the blast furnace gas after oxidation reaction is dehydrated by the dehydration assembly 5, and finally is discharged by the air outlet pipeline 6.

[0060] Further, the air inlet assembly 2 is arranged at the lower part of the main tank body 1, the air outlet pipeline 6 is arranged at the top of the main tank body 1, the characteristics of upward flow of gas and downward flow of water solution are utilized, one inlet and one outlet are arranged, and the desulfurization treatment is performed in the vertical space of the main tank body 1, so that the land occupation area of the desulfurization equipment is saved, and the space utilization rate of the main tank body 1 is improved.

[0061] In the embodiment of the present application, by arranging the biological filler area 3, the spraying assembly 4 and the dehydration assembly 5 in the main tank body 1, the full-process desulfurization of the blast furnace gas is carried out in a humid environment, avoiding the risk of deflagration caused by the mixing of the combustible gas in the blast furnace gas and air. In the biological filler area 3, the sulfides in the blast furnace gas are oxidized by using the characteristics of the desulfurization bacteria, and the treatment process is mild without the use of adsorption materials, the addition of a large amount of reagent, and the problem of the blockage of the blast furnace gas path caused by the blockage of the adsorption materials. The spraying assembly 4 utilizes the principle that the gas flows upward and the aqueous solution flows downward, and the blast furnace gas and the nutrient solution sprayed by the spraying assembly 4 are in opposite contact, which removes the elemental sulfur and some impurities in the blast furnace gas on one hand, and provides nutrients for the desulfurization bacteria in the biological filler area 3 on the other hand. The overall device has the advantages of high practicability, mild treatment process and high desulfurization efficiency.

[0062] In some embodiments of the present application, the biological filler area 3 includes a plurality of filler layers 31 arranged at intervals, each filler layer 31 includes a filler support plate 32 and a liquid redistributor, as shown in Figure 2 and Figure 3 The filler support plate 32 is a continuous bending structure, and a plurality of water holes are uniformly distributed on the top and bottom of the bending structure of the filler support plate 32 for flushing the biological filler area 3 by the nutrient solution sprayed by the spraying assembly 4. The liquid redistributor is arranged on the filler support plate 32 and is used for uniformly distributing the nutrient solution flowing through the filler support plate 32.

[0063] Specifically, the plurality of filler layers 31 arranged at intervals in the biological filler area 3 can perform multiple oxidation reactions on the sulfides in the blast furnace gas, so that the sulfides in the blast furnace gas are completely oxidized, and the desulfurization effect of the device is further improved.

[0064] Each filler layer 31 includes a filler support plate 32 and a liquid redistributor. The filler support plate 32 is a continuous bending structure for supporting the desulfurization bacteria filler, and a plurality of water holes are uniformly distributed on the top and bottom of the bending structure. The top and bottom are both perforated, which can accelerate the flushing speed of the nutrient solution sprayed by the spraying assembly 4 and the rising speed of the blast furnace gas, and will not cause the blockage of the blast furnace gas in the biological filler area 3. The liquid redistributor can uniformly distribute the nutrient solution flowing through the previous filler layer 31, thereby uniformly flushing the desulfurization bacteria filler in the next filler layer 31. On one hand, the desulfurization bacteria at each position can contact the nutrient solution, and on the other hand, the desulfurization bacteria filler of each layer can be uniformly flushed, thereby further ensuring the growth rate of the desulfurization bacteria and the flushing of the elemental sulfur and impurities, and improving the desulfurization effect.

[0065] As shown in Figure 4 and Figure 5As shown, in some embodiments of the present application, the spraying assembly 4 comprises a spraying pipeline and a flushing pipeline, the spraying pipeline comprises a spraying main pipe 41 and spraying branch pipes 42, the spraying branch pipes 42 are provided in plurality and uniformly connected to the spraying main pipe 41, the plurality of spraying branch pipes 42 are uniformly distributed with water holes, and the spraying pipeline can be set to continuously operate at a small flow rate.

[0066] The flushing pipeline is arranged above the spraying pipeline, nitrogen is used for flushing in the flushing pipeline, the flushing pipeline comprises a flushing main pipe 43 and flushing branch pipes 44, the flushing branch pipes 44 are provided in plurality and uniformly connected to the flushing main pipe 43, the plurality of flushing branch pipes 44 are uniformly distributed with air holes, and the flushing pipeline is used for flushing the spraying pipeline in stages, when cleaning, the flushing pipeline air holes spray nitrogen to blow the water holes in the spraying pipeline to prevent the water holes from being blocked.

[0067] Specifically, the spraying pipeline is provided with the spraying main pipe 41 and the spraying branch pipes 42, the spraying branch pipes 42 are uniformly distributed with the plurality of water holes, which can ensure the uniformity of the spraying nutrient solution, the flushing pipeline is used for flushing the spraying pipeline in stages to ensure the normal spraying of the spraying pipeline, the flushing pipeline is correspondingly arranged with the spraying pipeline to ensure the normal operation of the spraying assembly 4 and further ensure the desulfurization effect of the equipment.

[0068] As shown in Figure 1 and Figure 6 As shown, in some embodiments of the present application, the dehydration assembly 5 comprises a plurality of dehydration components arranged in an up-down interval, the blast furnace gas is subjected to multiple dehydration treatments to ensure the dryness of the desulfurized blast furnace gas and improve the practicability of the equipment.

[0069] Specifically, each dehydration component comprises a dehydrator 51 and a blowing pipeline 52, the dehydrator 51 is used for dehydrating the oxidized gas, and the blowing pipeline 52 is used for blowing and scaling the dehydrator 51.

[0070] In some embodiments of the present application, the dehydrator 51 comprises a center plate 511, an outer shell 512 and a plurality of vanes 513. The outer shell 512 is sealingly connected to the inner wall of the main tank body 1 to prevent the blast furnace gas from flowing out of the gap between the outer shell 512 and the inner wall of the main tank body 1, so that the blast furnace gas can only be discharged from the gas outlet pipeline 6 after being dehydrated by the dehydrator 51. The plurality of vanes 513 are circumferentially distributed between the center plate 511 and the outer shell 512, and the rotation directions of the plurality of vanes 513 are all towards the center direction of the main tank body 1 and the rotation directions are greater than 0°. The plurality of vanes 513 with rotation directions form a corrugated gas flow path in the main tank body 1. The change of the gas flow direction causes the liquid droplets carried in the blast furnace gas to impact on the vanes 513 and combine into larger droplets. Under the action of gravity, the large droplets after combination fall to the lower part of the main tank body 1, so that the water in the gas is removed. The dry gas is discharged through the gas outlet pipeline 6. The corrugated gas flow path formed by the plurality of vanes 513 with rotation directions in the main tank body 1 removes the water in the gas, and the vanes 513 with rotation directions increase the opportunity of capturing liquid droplets, thereby greatly improving the dehydration efficiency.

[0071] As shown in Figure 7 some embodiments of the present application, the purge pipeline 52 comprises a purge main pipe 521 and a plurality of purge branch pipes 522. The plurality of purge branch pipes 522 are uniformly connected to the purge main pipe 521, and a plurality of injection heads are uniformly connected to the plurality of purge branch pipes 522. After the device operates for a period of time, the vanes 513 will be scaled. Nitrogen is used for purging in the purge pipeline 52 to ensure the purging intensity through the purge main pipe 521, the purge branch pipes 522 and the injection heads.

[0072] As shown in Figure 1 some embodiments of the present application, the main tank body 1 further comprises a liquid storage area 7. The liquid storage area 7 is arranged below the gas inlet assembly 2. The liquid storage area 7 is used for storing the desulfurization liquid which is the product after the oxidation reaction of the biological filler area 3 by the spraying assembly 4. The desulfurization liquid plays a water sealing role on the tank body to avoid the occurrence of a gas breakdown accident. The bottom of the liquid storage area 7 is connected to a liquid discharge pipeline 71. The liquid discharge pipeline 71 is used for discharging the desulfurization liquid in the liquid storage area 7. The liquid discharge pipeline 71 is connected to a sludge discharge pipeline 72 which is used for discharging the sludge deposited on the tank bottom. The sludge discharge pipeline 72 is provided with a jet sludge discharger. The jet sludge discharger is a prior art, and the specific principle is not described here.

[0073] As shown in Figure 8 some embodiments of the present application, the gas inlet assembly 2 comprises a gas inlet main pipe 21 and a plurality of gas inlet branch pipes 22. The plurality of gas inlet branch pipes 22 are uniformly connected to the gas inlet main pipe 21, and a plurality of gas inlet holes are uniformly distributed on the plurality of gas inlet branch pipes 22. The plurality of gas inlet holes are uniformly distributed on the plane where the axial section of the main tank body 1 is located, so that the gas inlet is more uniform, and the desulfurization effect of the device is further improved.

[0074] In another aspect, the embodiments of the present application also provide a desulfurization system comprising the blast furnace gas biological desulfurization equipment according to any of the above embodiments. The beneficial effect of the desulfurization system in the embodiments of the present application is deduced in a manner similar to that of the blast furnace gas biological desulfurization equipment, and thus is not described here again.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A biological desulfurization device for blast furnace gas, characterized in that, Including a main tank (1), the main tank (1) contains, from bottom to top, the following: An air intake assembly (2) is used to supply gas into the main tank (1); Biological packing zone (3), which contains desulfurizing bacteria to react with sulfides in coal gas; A spray assembly (4) is used to rinse the products after oxidation reaction in the biological filler zone (3); Dehydration component (5) is used to dehydrate oxidized coal gas; An exhaust pipe (6) is located at the top of the main tank (1) and is used to connect the main tank (1) with an external pipe. The biological packing zone (3) includes multiple layers of packing layers (31) spaced apart, each of the packing layers (31) comprising: The packing support plate (32) is a continuous bent structure and multiple water holes are evenly distributed at the top and bottom of the bent structure; A liquid redistributor is provided on the packing support plate (32) for uniformly distributing the liquid flowing through the packing support plate (32).

2. The blast furnace gas biological desulfurization equipment according to claim 1, characterized in that, The spray assembly includes: The spray pipeline includes a main spray pipe (41) and a branch spray pipe (42). The branch spray pipe (42) is provided with multiple and evenly connected to the main spray pipe (41). Multiple water holes are evenly distributed on the multiple branch spray pipes (42). A flushing pipeline is provided above the spray pipeline. The flushing pipeline includes a main flushing pipe (43) and flushing branch pipes (44). Multiple flushing branch pipes (44) are provided and are evenly connected to the main flushing pipe (43). Multiple air holes are evenly distributed on the multiple flushing branch pipes (44).

3. The blast furnace gas biological desulfurization equipment according to claim 2, characterized in that, The dehydration assembly (5) includes multiple dehydration components arranged at intervals. Each dehydration component includes a dehydrator (51) and a purge pipe (52). The dehydrator (51) is used to dehydrate the oxidized coal gas, and the purge pipe (52) is used to purge the scale from the dehydrator (51).

4. The blast furnace gas biological desulfurization equipment according to claim 3, characterized in that, The dehydrator (51) includes: Center plate (511); The outer shell (512) is sealed to the inner wall of the main tank (1); The fan blades (513) are provided in multiple directions. The multiple fan blades (513) are evenly distributed circumferentially between the center plate (511) and the outer shell (512). The rotation direction of the multiple fan blades (513) is towards the center of the main tank (1) and the rotation angle is greater than 0°.

5. The blast furnace gas biological desulfurization equipment according to claim 4, characterized in that, The purging pipeline includes a main purging pipe (521) and purging branch pipes (522). Multiple purging branch pipes (522) are provided and evenly connected to the main purging pipe (521). Multiple spray heads are evenly connected to the multiple purging branch pipes (522).

6. The blast furnace gas biological desulfurization equipment according to claim 1, characterized in that, The main tank (1) also includes: The liquid storage area (7) is located below the air inlet assembly (2). The liquid storage area (7) is used to store the desulfurization liquid produced by the oxidation reaction of the biological packing area (3) after being rinsed by the spray assembly (4). The bottom of the liquid storage area (7) is connected to the drain pipe (71).

7. The blast furnace gas biological desulfurization equipment according to claim 6, characterized in that, The drain pipe (71) is connected to the sludge discharge pipe (72), and the sludge discharge pipe (72) is equipped with a jet sludge discharge device.

8. The blast furnace gas biological desulfurization equipment according to claim 1, characterized in that, The air intake assembly (2) includes an air intake main pipe (21) and air intake branch pipes (22). The air intake branch pipes (22) are provided with multiple pipes and are evenly connected to the air intake main pipe (21). Multiple air intake holes are evenly distributed on the multiple air intake branch pipes (22).

9. A desulfurization system, characterized in that, Including the blast furnace gas biological desulfurization equipment as described in any one of claims 1-8.

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