Gas replacement device for coke-oven gas

Abstract

The utility model relates to the technical field of coke-oven gas treatment and liquefied natural gas preparation, and discloses a gas replacement device for coke-oven gas, which comprises a desulfurizing tower, the right side of the outer wall of the desulfurizing tower is communicated with a gas inlet pipe, the middle part of the outer wall of the gas inlet pipe is communicated with a filter box, and the left side and the right side of the inner wall of the filter box are connected with filter screens in a sliding manner; a gas conveying pipe is communicated with the top of the left side of the outer wall of the desulfurization tower, the other end of the gas conveying pipe is communicated with a compressor, the output end of the compressor is communicated with a hose, the other end of the hose is communicated with an adsorption tower, and the middle of the outer wall of the hose is communicated with a cooling box. According to the utility model, solid particle impurities and sulfides are respectively removed through the filter screen and the desulfurization tower, the gas is efficiently purified, cooled, purified and dried through collaborative optimization of phase change assisted by gas pressure increased by the compressor and cooling and adsorption links, and finally, the gas is liquefied and stored through the low-temperature heat exchanger.

Description

TECHNICAL FIELD

[0001] The utility model relates to coke oven gas treatment and liquefied natural gas preparation technical field especially relates to a gas replacement device for coke oven gas. BACKGROUND

[0002] Coke oven gas refers to the coal for coking prepared with various bituminous coal, which is a kind of combustible gas generated at the same time as coke and tar products after high-temperature dry distillation in coking oven, and is a byproduct of coking industry. Since coke oven gas contains high-concentration methane and other combustible gas components, the energy density is high, and direct emission pollutes the environment, so a gas replacement device for coke oven gas is needed.

[0003] The traditional treatment method mainly discharges directly, which fails to fully utilize the energy resources, not only causing energy waste, but also polluting the air. The prior art uses chemical absorption method to absorb harmful components in coke oven gas by using chemical solvents, and then separates pure methane through subsequent processes. This method can achieve relatively complete purification, but the equipment investment is large, the operation cost is high, and it is not suitable for large-scale industrial production, reducing the practicality of the device. SUMMARY

[0004] To make up for the above shortcomings, the utility model provides a gas replacement device for coke oven gas, aiming at improving the problem that the prior art separates pure methane by chemical absorption method, the equipment investment is large, the operation cost is high, and it is not suitable for large-scale industrial production.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a gas replacement device for coke oven gas, comprising a desulfurization tower, the outer wall right side of the desulfurization tower is connected with an air inlet pipe, the outer wall middle part of the air inlet pipe is connected with a filter box, the inner wall left and right sides of the filter box are slidably connected with filter screens, the outer wall left side top of the desulfurization tower is connected with a gas conveying pipe, the other end of the gas conveying pipe is connected with a compressor, the output end of the compressor is connected with a hose, the other end of the hose is connected with an adsorption tower, the outer wall middle part of the hose is connected with a cooling box, the inner wall of the cooling box is fixedly connected with a circulating pipe, the bottom rear side of the cooling box is fixedly connected with a condenser, the rear end of the circulating pipe is communicated with the condenser, the bottom end middle part of the cooling box is fixedly connected with a water tank, the rear end of the water tank is communicated with the condenser, the outer wall front side of the water tank is fixedly connected with a circulating pump, the left end of the circulating pump is communicated with the water tank, the outer wall left side of the adsorption tower is connected with a conveying pipe, the left end of the conveying pipe is connected with a cold box, the top of the cold box is fixedly connected with a low-temperature heat exchanger, the left end of the cold box is connected with a flow pipe, the left end of the flow pipe is connected with a storage tank, the top of the filter box is provided with a box cover, and the bottom of the box cover is provided with a dismounting mechanism.

[0006] Through the technical scheme, the coke oven gas passes through the filter screen to remove larger solid particle impurities in the coke oven gas before entering the desulfurization tower through the gas inlet pipe, and the coke oven gas after the preliminary filtration enters the desulfurization tower, and a specific desulfurizer in the desulfurization tower reacts with sulfides in the coke oven gas to adsorb the sulfides, thereby removing the sulfur components in the coke oven gas, and obtaining relatively clean gas. The gas discharged from the desulfurization tower enters the compressor through the gas conveying pipe to compress the gas and increase the pressure of the gas, which is helpful to better realize phase change in the subsequent cooling and liquefaction process. The compressed gas enters the cooling box to be cooled, and the cooled gas enters the adsorption tower filled with molecular sieve adsorbent, which can adsorb water and other trace impurities in the gas to further improve the purity and dryness of the gas. In the cooling box, the gas exchanges heat with a low-temperature medium through a low-temperature heat exchanger, the temperature of the gas is further reduced, reaches the critical point of liquefaction, and gradually liquefies. The liquefied natural gas enters the storage tank through the flow pipe for storage and standby use.

[0007] Further description of the above technical scheme:

[0008] The dismounting mechanism comprises two hinges, both of which are fixedly connected to the rear side of the outer wall of the filter box and the outer wall of the box cover. The front end of the outer wall of the box cover is fixedly connected with hooks on both sides, and the front end of the outer wall of the filter box is fixedly connected with buckles on both sides. The two buckles are respectively engaged with the corresponding hooks. A reserved groove is formed in the inner wall of the filter box, and a collecting box is slidably connected to the inner wall of the reserved groove. The inner wall of the collecting box is fixedly connected with partitions on both sides, and the two partitions are respectively attached to the corresponding filter screens.

[0009] Through the above technical scheme, the two hinges are arranged to realize the rotatable connection of the box cover and the filter box, so that the box cover can be conveniently opened and closed. The hooks on the front end of the outer wall of the hinge are engaged with the buckles on the front end of the outer wall of the filter box. This simple and effective fixing method ensures the sealing and stability of the box cover in the closed state. The collecting box is used to collect the impurity particles falling from the filter screens during the filtering process, and the partitions are respectively attached to the corresponding filter screens, so that the impurities falling from the two filter screens fall into different areas of the collecting box.

[0010] Further description of the above technical scheme:

[0011] The top of the filter box is fixedly connected with a mounting box, and the inner wall of the mounting box is fixedly connected with an alarm lamp.

[0012] Through the above technical scheme, the alarm lamp will light up when a fault occurs during the operation of the device. The lighting of the alarm lamp can timely remind the operator that the device has a problem and needs to be checked and maintained.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the adsorption tower is fixedly connected with a mounting frame, and the outer wall of the mounting frame is fixedly connected with a display screen.

[0015] Through the above technical solution: the operator can understand the working condition of the adsorption tower in real time by observing the information on the display screen, and judge whether the adsorbent needs to be replaced or regenerated, and whether the adsorption process is normal.

[0016] As a further description of the above technical solution:

[0017] The outer wall of the two filter screens is fixedly connected with a sliding bar, and the inner wall of the filter box is provided with two sliding grooves, and the two sliding bars are respectively connected with the corresponding sliding grooves.

[0018] Through the above technical solution: when the filter screen needs to be cleaned or replaced, the operator only needs to slide the sliding bar along the sliding groove direction, so that the filter screen can be easily taken out from the filter box, and the maintenance efficiency is improved.

[0019] As a further description of the above technical solution:

[0020] The bottom of the cold box is fixedly connected with a mounting foot, and the middle of the mounting foot is provided with a reserved hole.

[0021] Through the above technical solution: when the device is installed in a specific site, the mounting foot can provide a stable support point, and the reserved hole is used to fasten the cold box and the ground by bolts.

[0022] As a further description of the above technical solution:

[0023] The outer wall of the cold box is fixedly connected with a controller, and the controller is electrically connected with the compressor, the condenser, the circulating pump and the low-temperature heat exchanger.

[0024] Through the above technical solution: through the coordinated control of the controller, each component can work cooperatively, realize the automation and precision of the whole coke oven gas preparation liquefied natural gas process, improve the reliability, stability and energy utilization efficiency of the system, and also reduce the difficulty and workload of manual operation.

[0025] As a further description of the above technical solution:

[0026] The outer wall of the collecting box is fixedly connected with a sliding plate, and the inner wall of the reserved groove is provided with a sliding groove, and the two sliding plates are respectively connected with the corresponding sliding grooves.

[0027] Through the technical scheme, the sliding plate is slidably connected with the sliding grooves on the left and right inner walls of the reserved groove, so that the collecting box can be conveniently pulled out of and inserted into the reserved groove.

[0028] The utility model has the advantages of the following:

[0029] 1、The utility model discloses, through filter screen and desulfurizing tower remove solid particle impurity and sulfide respectively, compressor lift gas pressure power phase change, cooling and adsorption link synergic optimization, make gas can efficient purification, cooling, purification drying, finally through low temperature heat exchanger liquefaction and store, not only has improved coke oven gas energy utilization, has optimized the process, reduced the cost, enhanced equipment operation stability, power enterprise realizes green sustainable development.

[0030] 2、The utility model discloses, through convenient buckle and hook operation and box lid rotation mode, can easily pull out filter screen and clean, greatly improved equipment maintenance efficiency, simultaneously, the cooperation of collecting box and baffle can effectively collect and distinguish the impurity of different filter screen drop, convenient for operator intuitive master filter screen state, in time discovers the problem and pertinence processing, optimized impurity management, improved the practicality of device. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a perspective view of a coke oven gas gas replacement device provided by the utility model;

[0032] Figure 2 It is an enlarged view of A of Figure 1

[0033] Figure 3 It is a front view of a coke oven gas gas replacement device provided by the utility model;

[0034] Figure 4 It is a dismounting mechanism schematic view of a coke oven gas gas replacement device provided by the utility model;

[0035] Figure 5 It is a partial structure schematic view of a coke oven gas gas replacement device provided by the utility model;

[0036] Figure 6 It is a partial structure split view of a coke oven gas gas replacement device provided by the utility model.

[0037] LEGEND:

[0038] ​1, desulfurization tower; 2, dismounting mechanism; 201, hinge; 202, hook; 203, buckle; 204, reserved slot; 205, collection box; 206, partition; 3, air inlet pipe; 4, filter box; 5, filter screen; 6, gas conveying pipe; 7, compressor; 8, hose; 9, adsorption tower; 10, cooling box; 11, circulating pipe; 12, condenser; 13, water tank; 14, circulating pump; 15, conveying pipe; 16, cold box; 17, low-temperature heat exchanger; 18, flow pipe; 19, storage tank; 20, box cover; 21, mounting box; 22, alarm lamp; 23, mounting frame; 24, display screen; 25, slide bar; 26, slide slot; 27, mounting foot; 28, reserved hole; 29, controller; 30, slide plate; 31, sliding groove. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the 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 scope of protection of the present application.

[0040] Referring to Figure 1 , Figure 2 and Figure 6The utility model provides a kind of gas replacement device for coke oven gas, including desulfurizer 1, desulfurizer 1 is used to remove sulfide in coke oven gas Key equipment, in desulfurizer 1, utilize specific desulfurizer and sulfide in coke oven gas occur chemical reaction, it is adsorbed or converted, to reduce the sulfur content in coke oven gas, the outer wall right side of desulfurizer 1 is communicated with inlet pipe 3, inlet pipe 3 transports coke oven gas from outside into desulfurizer 1, with certain pressure resistance and corrosion resistance, the outer wall middle part of inlet pipe 3 is communicated with filter box 4, the inner wall left and right sides of filter box 4 are slidably connected with filter screen 5, filter box 4 carries out preliminary filtration to coke oven gas, filter screen 5 effectively intercepts solid particles, protects subsequent equipment from the harm of impurities, the outer wall left side top of desulfurizer 1 is communicated with gas delivery pipe 6, the other end of gas delivery pipe 6 is communicated with compressor 7, after desulfurization and preliminary filtration, the pressure of coke oven gas is lower, and in subsequent cooling and liquefaction process, higher pressure helps gas to realize phase change better, compressor 7 gradually improves the pressure of coke oven gas by the way of multistage compression, so that it reaches the pressure level suitable for subsequent processing, the output of compressor 7 is communicated with hose 8, the other end of hose 8 is communicated with adsorption tower 9, adsorption tower 9 is filled with molecular sieve adsorbent, molecular sieve utilizes its porous structure and adsorption performance, and water and impurities are adsorbed on its surface, to further improve the purity and dryness of gas, the outer wall middle part of hose 8 is communicated with cooling box 10, cooling box 10 carries out cooling to coke oven gas, the inner wall of cooling box 10 is fixedly connected with circulation pipe 11, circulation pipe 11 provides flow channel for cooling medium, the bottom rear side of cooling box 10 is fixedly connected with condenser 12, the rear end of circulation pipe 11 is communicated with condenser 12, condenser 12 cools cooling medium in circulation pipe 11, the bottom middle part of cooling box 10 is fixedly connected with water tank 13, and water tank 13 provides cooling medium for circulating pump 14, to ensure that there is enough cooling medium to participate in heat exchange in the circulation process, the rear end of water tank 13 is communicated with condenser 12, the outer wall front side of water tank 13 is fixedly connected with circulating pump 14, and circulating pump 14 provides circulating power for cooling medium, the left end of circulating pump 14 is communicated with water tank 13, the outer wall left side of adsorption tower 9 is communicated with delivery pipe 15, the left end of delivery pipe 15 is communicated with cold box 16, the top of cold box 16 is fixedly connected with low-temperature heat exchanger 17, cold box 16 utilizes top fixedly connected low-temperature heat exchanger 17, and gas and low-temperature medium are exchanged, and gas temperature is reduced to below its liquefaction critical point, to realize the liquefaction of gas, the left end of cold box 16 is communicated with flow pipe 18, the left end of flow pipe 18 is communicated with storage tank 19, and storage tank 19 provides safe, stable storage environment for liquefied natural gas after production, the top of filter box 4 is provided with box cover 20, and the bottom of box cover 20 is provided with dismounting mechanism 2.The outer wall of the two filter screens 5 is fixedly connected with sliding strips 25 on the front and back sides, the inner wall of the filter box 4 is provided with two sliding grooves 26 on the front and back sides, the two sliding strips 25 are respectively in sliding connection with the corresponding sliding grooves 26, and the sliding strip 25 and the sliding groove 26 enable the filter screen 5 to be easily installed and dismounted in the filter box 4; the bottom of the cold box 16 is fixedly connected with mounting feet 27 around the periphery, the mounting feet 27 provide contact support points of the cold box 16 with the ground, the middle part of the plurality of mounting feet 27 is provided with a reserved hole 28, and the reserved hole 28 is used for fastening the cold box 16 to the ground or the mounting platform through bolts;

[0041] Specifically, the coke oven gas passes through the filter box 4 before entering the desulfurization tower 1 through the gas inlet pipe 3, the filter screen 5 in the filter box 4 removes larger solid particle impurities in the coke oven gas and preliminarily purifies the gas, the coke oven gas after preliminary filtration enters the desulfurization tower 1, and a specific desulfurizer in the desulfurization tower 1 reacts with sulfides in the coke oven gas to adsorb the sulfides, so that the sulfur component in the coke oven gas is removed, and relatively clean gas is obtained, the gas discharged from the desulfurization tower 1 enters the compressor 7 through the gas conveying pipe 6, the compressor 7 compresses the gas to increase the pressure of the gas, which is helpful to better realize phase change in the subsequent cooling and liquefaction process, the compressed gas enters the cooling box 10 through the hose 8, the circulating pump 14 pumps water in the water tank 13 out and conveys the water to the condenser 12 for cooling, the cooled water enters the circulating pipe 11 and exchanges heat with the high-temperature and high-pressure gas outside the pipe to reduce the temperature of the gas, the cooled gas enters the adsorption tower 9, the adsorption tower 9 is filled with molecular sieve adsorbent, the molecular sieve can adsorb water and other trace impurities in the gas, and the purity and dryness of the gas are further improved, in the cold box 16, the gas exchanges heat with a low-temperature medium through the low-temperature heat exchanger 17, the temperature of the gas is further reduced to reach the critical point of liquefaction, and the gas is gradually liquefied, the liquefied natural gas enters the storage tank 19 through the flow pipe 18 for storage and standby use; when the filter screen 5 needs to be cleaned or replaced, the operator only needs to slide the sliding strip 25 along the sliding groove 26, so that the filter screen 5 can be easily taken out of the filter box 4, and the maintenance efficiency is improved; when the device is installed in a specific site, the mounting feet 27 can provide stable support points, and the reserved holes 28 are used for fastening the cold box 16 to the ground through bolts.

[0042] Referring to Figure 1 , Figure 4 and Figure 5The dismounting mechanism 2 comprises two hinges 201, both of which are fixedly connected to the outer wall of the filter box 4 at the back side of the box cover 20, and the hinge 201 enables the box cover 20 to rotate around the axis of the hinge 201, thereby facilitating the opening and closing of the filter box 4. The outer wall of the box cover 20 is fixedly connected with hooks 202 at the left and right sides of the front end, and the outer wall of the filter box 4 is fixedly connected with buckles 203 at the left and right sides of the front end. The two buckles 203 are respectively engaged with the corresponding hooks 202. When the box cover 20 is closed, the buckle 203 is clamped into the hook 202, which can provide sufficient fastening force to ensure that the box cover 20 is tightly attached to the top of the filter box 4, thereby forming a good sealing effect and preventing foreign matter from entering the filter box 4. The inner wall of the filter box 4 is provided with a reserved groove 204 at the bottom, and the inner wall of the reserved groove 204 is slidably connected with a collection box 205. During the operation of the filter box 4, the filter screen 5 will intercept a large amount of impurities over time. The presence of the collection box 205 can effectively collect impurities, avoiding excessive accumulation of impurities in the filter box 4, which affects the filtering effect or causes damage to other components. The inner wall of the collection box 205 is fixedly connected with a partition plate 206 at the left and right sides, and the two partition plates 206 are respectively attached to the corresponding filter screen 5. The partition plate 206 divides the collection box 205 into two areas, so that the impurities falling from the two filter screens 5 fall into the corresponding areas, avoiding the mixing of impurities. The outer wall of the collection box 205 is fixedly connected with a sliding plate 30 at the left and right sides, and the inner wall of the reserved groove 204 is provided with a sliding groove 31 at the left and right sides. The two sliding plates 30 are respectively slidably connected with the corresponding sliding grooves 31. The cooperation of the sliding plate 30 and the sliding groove 31 plays a guiding and limiting role, ensuring that the collection box 205 always maintains the correct position and direction during the extraction and insertion process, and cannot be deviated or inclined;

[0043] Specifically, the two hinges 201 are arranged to achieve the rotatable connection of the box cover 20 and the filter box 4, so that the box cover 20 can be conveniently opened and closed. The hooks 202 on the left and right sides of the front end of the outer wall of the hinge 201 are clamped with the buckles 203 on the left and right sides of the front end of the outer wall of the filter box 4. This simple and effective fixing method ensures the sealing and stability of the box cover 20 in the closed state. The collection box 205 is used to collect the impurity particles falling from the filter screen 5 during the filtering process. The partition plates 206 are respectively attached to the corresponding filter screens 5, so that the impurities falling from the two filter screens 5 fall into different areas of the collection box 205, avoiding the mixing of impurities and facilitating the subsequent cleaning and analysis of different types of impurities. When the impurities in the collection box 205 accumulate to a certain extent, the operator can easily pull out the collection box 205, clean the impurities therein, and then put it back into the reserved slot 204, ensuring the continuous and effective use of the collection box 205, while reducing the impact of impurity accumulation in the filter box 4 on the filtering effect, improving the operation efficiency and reliability of the entire filtering system. The sliding plate 30 is slidably connected with the sliding grooves 31 on the left and right sides of the inner wall of the reserved slot 204, so that the collection box 205 can be easily pulled out and inserted from the reserved slot 204.

[0044] Referring to Figure 1 , Figure 2 and Figure 3 , the top of the filter box 4 is fixedly connected with the mounting box 21, which provides a mounting position and certain protection for the alarm lamp 22. The inner wall of the mounting box 21 is fixedly connected with the alarm lamp 22, which will be triggered to light up when a fault occurs during the operation of the device. The lighting of the alarm lamp 22 can timely remind the operator that the device has a problem. The outer wall of the front side of the adsorption tower 9 is fixedly connected with the mounting frame 23, and the outer wall of the front side of the mounting frame 23 is fixedly connected with the display screen 24. The operator can observe the information on the display screen 24 to real-time understand the working condition of the adsorption tower 9, judge whether the adsorbent needs to be replaced or regenerated, and whether the adsorption process is normal. The outer wall of the front side of the cold box 16 is fixedly connected with the controller 29, which is electrically connected with the compressor 7, the condenser 12, the circulating pump 14 and the low-temperature heat exchanger 17. Through the coordinated control of the controller 29, the various components can work cooperatively to realize the automation and precision of the entire coke oven gas preparation liquefied natural gas process, improve the reliability, stability and energy utilization efficiency of the system, and also reduce the difficulty and workload of manual operation.

[0045] Specifically, the alarm light 22 will be triggered to light up when the device fails during operation, which can remind the operator in time that the device has a problem and needs to be checked and maintained; the operator can understand the working condition of the adsorption tower 9 in real time through the information on the display screen 24, judge whether the adsorbent needs to be replaced or regenerated, and whether the adsorption process is normal; through the coordinated control of the controller 29, each component can work cooperatively to realize the automation and precision of the whole coke oven gas preparation liquefied natural gas process, improve the reliability, stability and energy utilization efficiency of the system, and also reduce the difficulty and workload of manual operation.

[0046] Working principle: Before the coke oven gas passes through the desulfurization tower 1 through the inlet pipe 3, the larger solid particle impurities in the coke oven gas are removed through the filter screen 5 to preliminarily purify the gas. The coke oven gas after preliminary filtration reacts with sulfides in the coke oven gas using a specific desulfurizer in the desulfurization tower 1 to adsorb the sulfides, obtaining relatively clean gas. The gas discharged from the desulfurization tower 1 enters the compressor 7 through the gas conveying pipe 6. The compressor 7 compresses the gas to improve the pressure of the gas, which helps to better realize phase change in the subsequent cooling and liquefaction process. The compressed gas enters the cooling box 10 through the hose 8. The circulating pump 14 pumps the water in the water tank 13 out and delivers it to the condenser 12 for cooling. The cooled water enters the circulating pipe 11 and exchanges heat with the high-temperature and high-pressure gas outside the pipe, absorbing the heat of the gas to reduce the temperature of the gas. The cooled gas enters the adsorption tower 9, which uses molecular sieve in the adsorption tower 9 to adsorb water and other trace impurities in the gas, further improving the purity and dryness of the gas. In the cold box 16, the gas exchanges heat with the low-temperature medium through the low-temperature heat exchanger 17, further reducing the temperature of the gas to its liquefaction critical point, gradually liquefying. The liquefied natural gas enters the storage tank 19 through the flow pipe 18 for storage and standby use. The filter screen 5 can be pulled out by rotating the box cover 20, so that the filter screen 5 can be easily removed for cleaning. The collection box 205 is used to collect the impurity particles falling from the filter screen 5 during the filtering process. The partition 206 is respectively attached to the corresponding filter screen 5, so that the impurities falling from the two filter screens 5 fall into different areas of the collection box 205, avoiding mixing of the impurities and facilitating subsequent cleaning and analysis of different types of impurities.

[0047] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A gas replacement device for coke oven gas, comprising a desulfurization tower (1), characterized in that: The desulfurization tower (1) has an inlet pipe (3) connected to the right side of its outer wall. A filter box (4) is connected to the middle of the outer wall of the inlet pipe (3). Filter screens (5) are slidably connected to the left and right sides of the inner wall of the filter box (4). A gas transmission pipe (6) is connected to the top left side of the outer wall of the desulfurization tower (1). A compressor (7) is connected to the other end of the gas transmission pipe (6). A hose (8) is connected to the output end of the compressor (7). An adsorption tower (9) is connected to the other end of the hose (8). A cooling box (10) is connected to the middle of the outer wall of the hose (8). A circulation pipe (11) is fixedly connected to the inner wall of the cooling box (10). A condenser (12) is fixedly connected to the rear bottom of the cooling box (10). The rear end of the circulation pipe (11) is connected to the condenser (12). The cooling box (10) is fixedly connected to a water tank (13) at the bottom center. The rear end of the water tank (13) is connected to the condenser (12). A circulation pump (14) is fixedly connected to the front side of the outer wall of the water tank (13). The left end of the circulation pump (14) is connected to the water tank (13). A conveying pipe (15) is connected to the left side of the outer wall of the adsorption tower (9). The left end of the conveying pipe (15) is connected to a cold box (16). A low-temperature heat exchanger (17) is fixedly connected to the top of the cold box (16). A flow pipe (18) is connected to the left end of the cold box (16). The left end of the flow pipe (18) is connected to a storage tank (19). A box cover (20) is provided on the top of the filter box (4). A disassembly mechanism (2) is provided at the bottom of the box cover (20).

2. The gas replacement device for coke oven gas according to claim 1, characterized in that: The disassembly mechanism (2) includes two hinges (201), both of which are fixedly connected to the rear side of the outer wall of the box cover (20) and the filter box (4). Hooks (202) are fixedly connected to the left and right sides of the front end of the outer wall of the box cover (20), and buckles (203) are fixedly connected to the left and right sides of the front end of the outer wall of the filter box (4). The two buckles (203) are respectively engaged with the corresponding hooks (202). A reserved groove (204) is provided at the bottom of the inner wall of the filter box (4). A collection box (205) is slidably connected to the inner wall of the reserved groove (204). A partition (206) is fixedly connected to the left and right sides of the inner wall of the collection box (205). The two partitions (206) are respectively attached to the corresponding filter screen (5).

3. The gas replacement device for coke oven gas according to claim 1, characterized in that: The top of the filter box (4) is fixedly connected to the mounting box (21), and the inner wall of the mounting box (21) is fixedly connected to the alarm light (22).

4. The gas replacement device for coke oven gas according to claim 1, characterized in that: An installation frame (23) is fixedly connected to the front side of the outer wall of the adsorption tower (9), and a display screen (24) is fixedly connected to the front side of the outer wall of the installation frame (23).

5. The gas replacement device for coke oven gas according to claim 1, characterized in that: The outer walls of the two filter screens (5) are fixedly connected with sliding strips (25) on the front and back sides. The inner walls of the filter box (4) are provided with two sliding grooves (26), and the two sliding strips (25) are slidably connected to the corresponding sliding grooves (26).

6. The gas replacement device for coke oven gas according to claim 1, characterized in that: The bottom of the cold box (16) is fixedly connected with mounting feet (27) on all four sides, and a reserved hole (28) is opened in the middle of each of the mounting feet (27).

7. The gas replacement device for coke oven gas according to claim 1, characterized in that: A controller (29) is fixedly connected to the front side of the outer wall of the cold box (16). The controller (29) is electrically connected to the compressor (7), condenser (12), circulating pump (14) and low temperature heat exchanger (17).

8. The gas replacement device for coke oven gas according to claim 2, characterized in that: The outer wall of the collection box (205) is fixedly connected to the left and right sides of the sliding plate (30), and the inner wall of the reserved groove (204) is provided with the sliding groove (31) on the left and right sides. The two sliding plates (30) are respectively slidably connected to the corresponding sliding groove (31).

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