Coke oven gas purification device

Abstract

The utility model relates to the technical field of gas purification, in particular to a coke oven gas purification device which comprises a gas-liquid separation condensation mechanism, a benzene washing tower, a desulfurization tower, an air blower and an ammonium sulfate saturator which are sequentially arranged, the desulfurizing tower is communicated with the benzene washing tower through a communicating pipe, the side wall of the desulfurizing tower is provided with an air outlet communicated with an air blower, the inner bottom wall of the benzene washing tower is provided with a water tank, the water tank is filled with washing oil, and the side wall of the water tank is provided with an oil outlet; a gas inlet mechanism and a first spraying mechanism are arranged in the benzene washing tower, and the gas inlet mechanism is used for introducing coal gas into the water tank; the first spraying mechanism is used for spraying wash oil to the coal gas; a second spraying mechanism is arranged in the desulfurization tower and is used for spraying an absorbent to the coal gas; through the arrangement of the benzene washing tower, the supporting shell, the gas inlet mechanism, the first spraying mechanism, the second spraying mechanism and the communicating pipe, the gas purification efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of coal gas purification technology, specifically to a coke oven gas purification device. Background Technology

[0002] Coke oven gas purification equipment is used to refine and purify coke oven gas, removing impurities and bringing it to a higher quality standard. The traditional coke oven gas purification process is as follows:

[0003] Condensation: Low-temperature cooling water is sprayed directly onto the gas. The gas and cooling water come into direct contact and exchange heat. The gas is cooled, and the condensable substances in it condense down. At the same time, some dust and tar and other impurities in the gas are washed away.

[0004] Benzene washing: Pretreated coal gas enters from the bottom of the benzene washing tower and comes into countercurrent contact with wash oil sprayed down from the top of the tower. During the countercurrent contact process, benzene hydrocarbons in the coal gas dissolve in the wash oil due to the principle of "like dissolves like," thereby reducing the benzene content in the coal gas and achieving benzene washing and purification of the coal gas.

[0005] Desulfurization: It utilizes alkaline solutions (such as sodium carbonate solution, ammonia water, etc.) or redox solutions (such as anthraquinone disulfonic acid method, modified ADA method, etc.) to chemically react with hydrogen sulfide in coal gas, absorbing the hydrogen sulfide and converting it into other substances.

[0006] The present invention aims to provide a coke oven gas purification device with high gas purification efficiency. Utility Model Content

[0007] The purpose of this invention is to provide a coke oven gas purification device to solve the problems existing in the prior art and improve the purification efficiency of the gas.

[0008] To achieve the above objectives, this utility model provides the following solution:

[0009] A coke oven gas purification device includes a gas-liquid separation and condensation mechanism, a benzene washing tower, a desulfurization tower, a blower, and an ammonium sulfate saturator arranged in sequence. The desulfurization tower is connected to the benzene washing tower through a connecting pipe. The side wall of the desulfurization tower has an outlet for connecting to the blower. The inner bottom wall of the benzene washing tower has a water tank filled with washing oil. The side wall of the water tank has an oil outlet.

[0010] The benzene washing tower is equipped with an air inlet mechanism and a first spray mechanism. The air inlet mechanism is used to introduce coal gas into the water tank; the first spray mechanism is used to spray the coal gas to wash oil.

[0011] The desulfurization tower is equipped with a second spraying mechanism, which is used to spray absorbent onto the coal gas.

[0012] As one embodiment, the air intake mechanism includes:

[0013] A rotating mechanism is mounted on a supporting shell inside the benzene washing tower;

[0014] The first air intake pipe is connected between the support housing and the bottom of the water tank, and the rotating mechanism is used to drive the first air intake pipe to rotate.

[0015] The second air intake pipe is connected to the first air intake pipe and multiple second air intake pipes are provided. The end of the second air intake pipe away from the first air intake pipe is sealed, and multiple air inlets are provided on the second air intake pipe.

[0016] And a third air inlet pipe, which is installed through the benzene washing tower, passes through the support shell and extends into the first air inlet pipe.

[0017] As one embodiment, a plurality of stirring rods are fixedly provided on the side wall of the first air intake pipe.

[0018] As one embodiment, a plurality of fixed columns are fixedly provided between the side wall of the supporting shell and the side wall of the benzene washing tower.

[0019] As one embodiment, the rotating mechanism includes:

[0020] The first bevel gear is rotatably mounted on the inner bottom wall of the support housing; the first air intake pipe passes through the support housing and is fixedly connected to the first bevel gear; the third air intake pipe passes through the first bevel gear and is rotatably connected to the first bevel gear.

[0021] The second bevel gear is rotatably mounted on the side wall of the support housing, and the second bevel gear meshes with the first bevel gear;

[0022] And a first motor, which is fixedly mounted on the benzene washing tower, and a drive rod is fixedly mounted between the output end of the first motor and the second bevel gear.

[0023] As one embodiment, the first spraying mechanism includes:

[0024] The first spray pipe is rotatably mounted on the inner top wall of the benzene washing tower, and the end of the first spray pipe near the supporting shell is sealed.

[0025] The second spray pipe is provided with multiple second spray pipes connected to the side wall of the first spray pipe. The end of the second spray pipe away from the first spray pipe is sealed. Multiple first nozzles are provided connected to the side wall of the second spray pipe.

[0026] The first water inlet pipe and the first air inlet pipe are installed through the benzene washing tower, with the end of the first water inlet pipe near the first spray pipe extending into the first spray pipe.

[0027] And a driving mechanism, which is disposed between the support housing and the first spray pipe, for driving the first spray pipe to rotate.

[0028] As one embodiment, the driving mechanism includes:

[0029] The third bevel gear is rotatably mounted on the inner top wall of the support housing, and the third bevel gear meshes with the second bevel gear;

[0030] And a drive column, which is fixedly disposed between the third bevel gear and the first spray pipe.

[0031] As one embodiment, the second spraying mechanism includes:

[0032] A spray shell is rotatably mounted on the inner top wall of the desulfurization tower, and multiple second spray nozzles are connected to the side wall of the spray shell;

[0033] The second water inlet pipe and the second air inlet pipe are installed through the inner top wall of the desulfurization tower. The end of the second water inlet pipe near the spray shell is connected to the spray shell, and the second water inlet pipe is rotatably connected to the spray shell.

[0034] And a water outlet pipe, which is connected to the side wall of the desulfurization tower.

[0035] As one embodiment, a water outlet control valve is provided inside the water outlet pipe, and an oil outlet control valve is also provided at the oil outlet.

[0036] As one embodiment, the gas-liquid separation and condensation mechanism is further provided with an air spray tower for dust removal at its front end.

[0037] The present invention has the following technical advantages over the prior art:

[0038] 1. This utility model, through the arrangement of a benzene washing tower, a supporting shell, an air inlet mechanism, a first spraying mechanism, a second spraying mechanism, and a connecting pipe, can improve the uniformity of the distribution of washing oil and absorbent by spraying washing oil and desulfurizing agent, thereby improving the purification efficiency of coal gas.

[0039] 2. This utility model, through the setting of the air intake mechanism, introduces gas into the first air intake pipe through the third air intake pipe, and then blows gas into the water tank through the second air intake pipe and the air inlet. Thus, the gas achieves benzene washing through direct contact with the washing oil. At the same time, the operation of the first motor can drive the second bevel gear to rotate, and then the meshing of the second bevel gear and the first bevel gear drives the first air intake pipe to rotate. Thus, while adjusting the position of the air inlet, the washing oil can be stirred, thereby improving the benzene washing efficiency of the gas.

[0040] 3. By setting up the first spraying mechanism, the present invention can blow washing oil into the first spraying pipe through the first water inlet pipe, and then spray the washing oil through the first nozzle. At the same time, the meshing of the second bevel gear and the third bevel gear can drive the first spraying pipe to rotate, thereby realizing the adjustment of the position of the first nozzle, which can further improve the benzene washing effect of the gas.

[0041] 4. By setting up a second spraying mechanism, the absorbent can be blown into the spraying housing through the second water inlet pipe, and then sprayed through the second nozzle, thereby facilitating the desulfurization treatment of the coal gas through contact between the absorbent and the coal gas. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the desulfurization tower in one embodiment of the present invention;

[0044] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0045] Figure 3 This is a schematic diagram of the benzene washing tower in one embodiment of the present invention;

[0046] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0047] Figure 5 for Figure 4 A structural diagram from another perspective;

[0048] Figure 6 This is a schematic diagram of the first spraying mechanism in one embodiment of the present invention;

[0049] Figure 7 This is a cross-sectional view of the air intake mechanism in one embodiment of the present invention;

[0050] Figure 8 This is a schematic diagram of a benzene washing tower with benzene washing packing in one embodiment of the present invention;

[0051] Figure 9 This is a schematic diagram of a gas purification process in one embodiment of the present invention.

[0052] Figure Labels

[0053] 1. Benzene washing tower; 2. Desulfurization tower; 3. Water tank; 4. Support shell; 5. Fixed column; 6. Connecting pipe; 7. First air inlet pipe; 8. Second air inlet pipe; 9. Third air inlet pipe; 10. First bevel gear; 11. Second bevel gear; 12. First motor; 13. First spray pipe; 14. Second spray pipe; 15. First water inlet pipe; 16. Third bevel gear; 17. Drive column; 18. Spray shell; 19. Second water inlet pipe; 20. Water outlet pipe; 21. Desulfurization packing; 22. Benzene washing packing. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0055] The purpose of this invention is to provide a coke oven gas purification device to solve the problems existing in the prior art and improve the purification efficiency of the gas.

[0056] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] like Figures 1-5As shown in the figure, this embodiment proposes a coke oven gas purification device, including a gas-liquid separation and condensation mechanism, a benzene washing tower 1, a desulfurization tower 2, a blower, and an ammonium sulfate saturator arranged in sequence. The desulfurization tower 2 is connected to the benzene washing tower through a connecting pipe 6. The side wall of the desulfurization tower 2 has an outlet for connecting to the blower. The inner bottom wall of the benzene washing tower 1 has a water tank 3, which is filled with washing oil. The side wall of the water tank 3 has an oil outlet, which is equipped with an oil outlet control valve. The support shell 4 is installed on the benzene washing tower 1. Multiple fixing columns 5 are fixedly installed between the side wall of the support shell 4 and the side wall of the benzene washing tower 1. The air inlet mechanism is installed on the support shell 4 for introducing gas into the water tank 3. The first spraying mechanism is installed on the benzene washing tower 1 for spraying the gas with washing oil. The second spraying mechanism is installed on the desulfurization tower 2 for spraying the gas with absorbent. The connecting pipe 6 is connected between the benzene washing tower 1 and the desulfurization tower 2.

[0058] The gas-liquid separation and condensation mechanism can use existing equipment, specifically including a gas-liquid separator and a primary cooler. The gas is drawn into the gas-liquid separator, and after gas-liquid separation, the raw gas comes out from the top and enters the horizontal tube primary cooler, where it is cooled in two stages. The upper stage uses circulating water at 30℃~35℃, and the lower stage uses low-temperature water at 14℃~18℃ to cool the gas to 20℃~24℃, removing water vapor, naphthalene, tar and other substances from the coke oven gas. In order to ensure the cooling effect of the primary cooler, a mixture of tar and ammonia water is continuously sprayed in the upper and lower stages, and the top is periodically rinsed with hot ammonia water to remove impurities such as tar and naphthalene from the pipe wall.

[0059] In this embodiment, the blower and ammonium sulfate saturator can be existing devices, and the ammonium sulfate process is also a technology well known to those skilled in the art, so this embodiment will not elaborate on it.

[0060] In this embodiment, both the benzene washing tower 1 and the desulfurization tower 2 are packed towers. The benzene washing tower 1 is equipped with benzene washing packing, and the desulfurization tower 2 is equipped with desulfurization packing. Wash oil and absorbent are evenly sprayed onto the benzene washing packing 22 and the desulfurization packing 21 for benzene washing and desulfurization. The wash oil falls to the bottom of the benzene washing tower 1 and flows out from the oil outlet.

[0061] Reference Figure 2 and Figure 5In this embodiment, the air intake mechanism includes a first air intake pipe 7, a second air intake pipe 8, a third air intake pipe 9, and a rotating mechanism. The first air intake pipe 7 is connected between the support housing 4 and the bottom of the water tank 3. Multiple stirring rods are fixedly installed on the side wall of the first air intake pipe 7. Multiple second air intake pipes 8 are connected to the first air intake pipe 7. The end of the second air intake pipe 8 away from the first air intake pipe 7 is sealed. Multiple air inlets are opened on the second air intake pipe 8. The third air intake pipe 9 is installed through the benzene washing tower 1. The third air intake pipe 9 passes through the support housing 4 and extends into the first air intake pipe 7. The rotating mechanism is installed on the support housing 4 and is used to drive the first air intake pipe 7 to rotate. The rotating mechanism includes a first bevel gear 10, a second bevel gear 11, and a first motor 12. The first bevel gear 10 is rotatably installed on the inner bottom wall of the support housing 4. The first air intake pipe 7 passes through the support housing 4 and is fixedly connected to the first bevel gear 10. The third air intake pipe 9 passes through the first bevel gear 10 and is rotatably connected to the first bevel gear 11. The bevel gear 11 is rotatably mounted on the side wall of the support housing 4. The second bevel gear 11 meshes with the first bevel gear 10. The first motor 12 is fixedly mounted on the benzene washing tower 1. A drive rod is fixedly mounted between the output end of the first motor 12 and the second bevel gear 11. The operator can use a blower to pass the gas generated by the coke oven into the third air inlet pipe 9, and then through the third air inlet pipe 9 into the first air inlet pipe 7. Then, the gas can be blown into the water tank 3 through the second air inlet pipe 8 and the air inlet. The benzene washing of the gas is achieved through direct contact between the gas and the washing oil. At the same time, the operation of the first motor 12 can drive the second bevel gear 11 to rotate, and then through the meshing of the second bevel gear 11 and the first bevel gear 10, the first air inlet pipe 7 can be rotated. Thus, while adjusting the position of the air inlet, the washing oil at the bottom can be stirred, thereby improving the benzene washing efficiency of the gas. After the gas is washed by the bottom washing oil, it comes into contact with the washing oil again at the benzene washing packing 22 to wash benzene, ensuring the benzene washing effect.

[0062] Reference Figures 2-4In this embodiment, the first spraying mechanism includes a first spray pipe 13, a second spray pipe 14, a first water inlet pipe 15, and a driving mechanism. The first spray pipe 13 is rotatably mounted on the inner top wall of the benzene washing tower 1. The end of the first spray pipe 13 near the supporting shell 4 is sealed. Multiple second spray pipes 14 are connected to the side wall of the first spray pipe 13. The end of the second spray pipe 14 away from the first spray pipe 13 is sealed. Multiple first nozzles are connected to the side wall of the second spray pipe 14. A first air inlet pipe 7 is installed through the benzene washing tower 1. The end of the first water inlet pipe 15 near the first spray pipe 13 extends into the first spray pipe 13. The driving mechanism is located between the supporting shell 4 and the first spray pipe 13 and is used to drive the first spray pipe 15. The spray pipe 13 rotates, and the driving mechanism includes a third bevel gear 16 and a drive column 17. The third bevel gear 16 is rotatably mounted on the inner top wall of the support housing 4. The third bevel gear 16 meshes with the second bevel gear 11. The drive column 17 is fixedly mounted between the third bevel gear 16 and the first spray pipe 13. Washing oil can be blown into the first spray pipe 13 through the first water inlet pipe 15, and then the washing oil can be sprayed through the first nozzle. At the same time, the meshing of the second bevel gear 11 and the third bevel gear 16 can drive the first spray pipe 13 to rotate, thereby adjusting the position of the first nozzle, which can further improve the uniformity of the washing oil spray and improve the benzene washing effect of the coal gas.

[0063] Reference Figure 2 and Figure 3 In this embodiment, the second spraying mechanism includes a spray housing 18, a second inlet pipe 19, and an outlet pipe 20. The spray housing 18 is rotatably mounted on the inner top wall of the desulfurization tower 2. Multiple second nozzles are connected to the side wall of the spray housing 18. The second air inlet pipe 8 is installed through the inner top wall of the desulfurization tower 2. The end of the second inlet pipe 19 near the spray housing 18 is connected to the spray housing 18. The second inlet pipe 19 is rotatably connected to the spray housing 18. The outlet pipe 20 is connected to the side wall of the desulfurization tower 2. An outlet control valve is installed in the outlet pipe 20. The absorbent can be blown into the spray housing 18 through the second inlet pipe 19, and then sprayed through the second nozzles. Thus, the desulfurization of the coal gas can be achieved through the contact between the absorbent and the coal gas.

[0064] In this embodiment, the operator can use a blower to introduce the coke oven gas into the third intake pipe 9, and then into the first intake pipe 7 through the third intake pipe 9. Subsequently, the gas can be blown into the water tank 3 through the second intake pipe 8 and the intake port. This allows for heat exchange between the gas and the washing oil, achieving cooling of the gas. Simultaneously, the direct contact between the gas and the washing oil enables benzene washing. The operation of the first motor 12 drives the second bevel gear 11 to rotate, which in turn, through the meshing of the second bevel gear 11 and the first bevel gear 10, drives the first intake pipe 7 to rotate. This allows for adjustment of the intake port position while simultaneously agitating the washing oil, thereby improving the cooling of the gas and the efficiency of benzene washing. The operator can also use the first intake pipe 8 to blow the gas into the water tank 3. Water pipe 15 blows washing oil into the first spray pipe 13, which can then be sprayed through the first nozzle. Simultaneously, the meshing of the second bevel gear 11 and the third bevel gear 16 drives the first spray pipe 13 to rotate, thereby adjusting the position of the first nozzle and further improving the benzene washing effect of the coal gas. The coal gas after benzene washing can enter the desulfurization tower 2 through the connecting pipe 6. Then, the operator blows absorbent into the spray shell 18 through the second water inlet pipe 19, which can then be sprayed through the second nozzle. The contact between the absorbent and the coal gas achieves desulfurization treatment of the coal gas. Afterward, the coal gas ventilation blower pressurizes the air and sends it into the ammonium sulfate saturator, where it reacts with ammonia to obtain clean coal gas, which is then discharged through the outlet.

[0065] As one embodiment, in this embodiment, an air spray tower for dust removal is also provided at the front end of the gas-liquid separation and condensation mechanism.

[0066] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0067] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A coke oven gas purification device, characterized in that, The system includes a gas-liquid separation and condensation mechanism, a benzene washing tower, a desulfurization tower, a blower, and an ammonium sulfate saturator arranged in sequence. The desulfurization tower is connected to the benzene washing tower through a connecting pipe. The side wall of the desulfurization tower has an air outlet connected to the blower. The inner bottom wall of the benzene washing tower has a water tank filled with washing oil. The side wall of the water tank has an oil outlet. The benzene washing tower is equipped with an air inlet mechanism and a first spray mechanism. The air inlet mechanism is used to introduce coal gas into the water tank; the first spray mechanism is used to spray the coal gas to wash oil. The desulfurization tower is equipped with a second spraying mechanism, which is used to spray absorbent onto the coal gas.

2. The coke oven gas purification device according to claim 1, characterized in that, The air intake mechanism includes: A rotating mechanism is mounted on a supporting shell inside the benzene washing tower; The first air intake pipe is connected between the support housing and the bottom of the water tank, and the rotating mechanism is used to drive the first air intake pipe to rotate. The second air intake pipe is connected to the first air intake pipe and multiple second air intake pipes are provided. The end of the second air intake pipe away from the first air intake pipe is sealed, and multiple air inlets are provided on the second air intake pipe. And a third air inlet pipe, which is installed through the benzene washing tower, passes through the support shell and extends into the first air inlet pipe.

3. The coke oven gas purification device according to claim 2, characterized in that, Multiple stirring rods are fixedly installed on the side wall of the first air intake pipe.

4. The coke oven gas purification device according to claim 2, characterized in that, Multiple fixed columns are fixedly installed between the side wall of the supporting shell and the side wall of the benzene washing tower.

5. A coke oven gas purification device according to claim 2, characterized in that, The rotating mechanism includes: The first bevel gear is rotatably mounted on the inner bottom wall of the support housing; the first air intake pipe passes through the support housing and is fixedly connected to the first bevel gear; the third air intake pipe passes through the first bevel gear and is rotatably connected to the first bevel gear. The second bevel gear is rotatably mounted on the side wall of the support housing, and the second bevel gear meshes with the first bevel gear; And a first motor, which is fixedly mounted on the benzene washing tower, and a drive rod is fixedly mounted between the output end of the first motor and the second bevel gear.

6. The coke oven gas purification device according to claim 5, characterized in that, The first spraying mechanism includes: The first spray pipe is rotatably mounted on the inner top wall of the benzene washing tower, and the end of the first spray pipe near the supporting shell is sealed. The second spray pipe is provided with multiple second spray pipes connected to the side wall of the first spray pipe. The end of the second spray pipe away from the first spray pipe is sealed. Multiple first nozzles are provided connected to the side wall of the second spray pipe. The first water inlet pipe and the first air inlet pipe are installed through the benzene washing tower, with the end of the first water inlet pipe near the first spray pipe extending into the first spray pipe. And a driving mechanism, which is disposed between the support housing and the first spray pipe, for driving the first spray pipe to rotate.

7. A coke oven gas purification device according to claim 6, characterized in that, The drive mechanism includes: The third bevel gear is rotatably mounted on the inner top wall of the support housing, and the third bevel gear meshes with the second bevel gear; And a drive column, which is fixedly disposed between the third bevel gear and the first spray pipe.

8. A coke oven gas purification device according to claim 7, characterized in that, The second spray mechanism includes: A spray shell is rotatably mounted on the inner top wall of the desulfurization tower, and multiple second spray nozzles are connected to the side wall of the spray shell; The second water inlet pipe and the second air inlet pipe are installed through the inner top wall of the desulfurization tower. The end of the second water inlet pipe near the spray shell is connected to the spray shell, and the second water inlet pipe is rotatably connected to the spray shell. And a water outlet pipe, which is connected to the side wall of the desulfurization tower.

9. A coke oven gas purification device according to claim 8, characterized in that, A water outlet control valve is installed inside the water outlet pipe; an oil outlet control valve is also installed at the oil outlet.

10. A coke oven gas purification device according to claim 1, characterized in that, The gas-liquid separation and condensation mechanism is also equipped with an air spray tower for dust removal at its front end.

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