A naphthalene removal device for purifying coke oven gas

Abstract

This application relates to the field of coal gas impurity filtration technology, and in particular to a naphthalene removal device for purifying coke oven gas, comprising a coal gas transfer tank, a gas guide pipe, a separation tank, a heating box, a lean oil spray assembly, and a rapid separation assembly. The naphthalene removal device for purifying coke oven gas of this application converts solid naphthalene into liquid through the heating box, and combined with the rapid separation assembly, achieves continuous and efficient separation and discharge of naphthalene, effectively avoiding equipment and pipeline blockage and significantly reducing maintenance difficulty. The wooden grid packing layer enhances gas-liquid contact, and the lean oil spray effectively captures and dissolves naphthalene and other volatile components. Combined with nitrogen-assisted purging, it improves impurity separation efficiency and reduces the burden of subsequent processing. Furthermore, the introduction of a metering pump and a self-priming pump enables precise control of oil inlet and media delivery, while the solenoid valve feed pipe facilitates the recovery of valuable components. The overall system operation is more flexible and stable, significantly improving its practicality.

Description

Technical Field

[0001] This application relates to the field of gas impurity filtration technology, and in particular to a naphthalene removal device for purifying coke oven gas. Background Technology

[0002] Waste gas collection devices are mainly used for collecting waste gases generated in industrial sites, such as toxic and harmful gases and odorous gases. This includes the collection of naphthalene-containing waste gas. Currently, due to the low boiling point of the waste gas, the collection of naphthalene-containing waste gas can only be carried out by setting up treatment stations nearby in different areas, and it is not possible to lay long pipelines for centralized treatment.

[0003] Chinese utility model patent CN215480762U discloses a naphthalene removal device for purifying coke oven gas. The device comprises a first water pump, a liquid-cooled pipe, and a chiller. When treating waste gas, the chiller and the first water pump are operated by a control switch. Naphthalene in the waste gas condenses and adsorbs onto the surface of the liquid-cooled pipe. The first water pump, liquid-cooled pipe, and chiller facilitate the separation of naphthalene from the waste gas. A second water tank, a third water pump, and nozzles are also included. When treating naphthalene crystals on the surface of the liquid-cooled pipe, the third water pump is operated by a control switch to rinse the naphthalene crystals off the surface of the liquid-cooled pipe.

[0004] Regarding the aforementioned technologies, the inventors believe the following technical defects require improvement: Although the above-mentioned device utilizes the characteristic that the saturated vapor pressure of naphthalene in coal gas decreases sharply with decreasing temperature, and directly supersaturates and crystallizes naphthalene vapor by pressurizing and deeply cooling the coal gas, the precipitated naphthalene is a solid, making it difficult to continuously and thoroughly remove from the system. This easily causes blockages in equipment pipelines, making operation and maintenance very difficult. The collected naphthalene contains tar, dust, and other impurities, requiring multi-stage processing, thus reducing its practicality. Utility Model Content

[0005] This application provides a naphthalene removal device for purifying coke oven gas to improve the following technical problems: the naphthalene precipitated by traditional devices is solid, which is difficult to remove continuously and thoroughly from the system, easily causing equipment and pipeline blockage, making operation and maintenance very difficult, and the collected naphthalene contains other impurities such as tar and dust, requiring multi-stage treatment, and has low practicality.

[0006] This application provides a naphthalene removal device for purifying coke oven gas, which adopts the following technical solution: A naphthalene removal device for purifying coke oven gas includes a gas transfer tank, a gas guide pipe, a separation tank, a heating box, a lean oil spray assembly, and a rapid separation assembly. One side of the gas guide pipe is installed at the bottom of the gas transfer tank, and the other side of the gas guide pipe passes through the top of the separation tank and is in close contact with the inner surface of the separation tank. The separation tank is located outside the gas transfer tank, and the heating box is located outside the separation tank. The bottom conveying end of the separation tank is connected to the bottom of the heating box through a pipe. The lean oil spray assembly is installed outside the separation tank, and the rapid separation assembly is installed inside the heating box.

[0007] In one feasible technical solution of this application, a nitrogen tank and a connecting pipe are also provided on the outside of the separation tank. The top of the nitrogen tank is connected to one side of the connecting pipe through an exhaust valve, and the other side of the connecting pipe passes through the bottom of the separation tank and is tightly fitted to the inner wall of the bottom of the separation tank.

[0008] In one feasible technical solution of this application, the lean oil spraying assembly includes an oil storage tank, a circular pipe, spray heads, and an oil delivery pipe. The output end of the oil storage tank is fixedly connected to the bottom of the oil delivery pipe, the circular pipe is fixedly connected to the top outside of the oil delivery pipe, and the spray heads are arranged in a ring array at the bottom of the separation tank located at the bottom of the circular pipe.

[0009] In one feasible technical solution of this application, the rapid separation assembly includes a swing frame, a support base, a rotating shaft, a paddle, a rotating cam, a DC motor, and a transmission shaft. The swing frame is movably connected inside the heating chamber, the support base is fixedly connected to the bottom of the swing frame, the rotating shaft is sleeved on the bottom of the support base, the paddle is fixedly connected to the outside of the rotating shaft, the protruding end surface of the rotating cam abuts against the surface of the paddle, the transmission shaft passes through the interior of the rotating cam and is rotatably connected to the outside of the heating chamber, and the output end of the DC motor is fixedly connected to one end of the transmission shaft.

[0010] In one feasible technical solution of this application, the interior of the separator is provided with several sets of wooden grid packing materials arranged at equal intervals to ensure full contact between the coal gas and the washing oil.

[0011] In one feasible technical solution of this application, a metering pump for controlling the oil inlet volume is also provided on the outer side of the oil pipeline near the oil storage tank.

[0012] In one feasible technical solution of this application, a self-priming pump is provided on the outside of the gas guide pipe and the connecting pipe between the separation tank and the heating box.

[0013] In one feasible technical solution of this application, the top outer side of the heating box is also equipped with several sets of material pipes with solenoid valves for recovering vaporized naphthalene vapor, benzene vapor, nitrogen and water vapor.

[0014] In summary, this application includes at least one of the following beneficial technical effects: This device converts solid naphthalene into liquid through a heating chamber, and combines this with a rapid separation component to achieve continuous and efficient separation and discharge of naphthalene, effectively avoiding equipment and pipeline blockage and significantly reducing maintenance difficulty. The wooden grid packing layer enhances gas-liquid contact, and lean oil spraying effectively captures and dissolves naphthalene and other volatile components. Combined with nitrogen-assisted purging, it improves impurity separation efficiency and reduces the burden of subsequent processing. Furthermore, the introduction of metering pumps and self-priming pumps enables precise control of oil inlet and media delivery, while the solenoid valve feed pipe facilitates the recovery of valuable components. The overall system operation is more flexible and stable, significantly improving practicality. The gas guide pipe and related connecting pipelines are all equipped with self-priming pumps to ensure smooth media delivery; the top of the heating chamber has a feed pipe with a solenoid valve for recovering vaporized naphthalene vapor, benzene vapor, nitrogen, and water vapor, preventing pipeline blockage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the naphthalene removal device for purifying coke oven gas according to an embodiment of this application.

[0017] Figure 2 This is a distribution diagram of the feed tube with solenoid valve in the embodiments of this application.

[0018] Figure 3 This is a cross-sectional view of the separation tank in an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the rapid separation component in the embodiments of this application.

[0020] Figure 5 This is a distribution diagram of the rotation axes in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures: 1. Gas transfer tank; 2. Gas delivery pipe; 3. Separator; 4. Heating box; 5. Lean oil spray assembly; 51. Oil storage tank; 53. Circular pipe; 54. Spray head; 55. Oil delivery pipe; 6. Quick-release assembly; 61. Swing frame; 62. Support base; 63. Rotary shaft; 64. Paddle; 65. Rotary cam; 66. DC motor; 67. Drive shaft; 7. Nitrogen tank; 8. Connecting pipe; 9. Wooden packing; 10. Metering pump; 11. Self-priming pump; 12. Material pipe with solenoid valve. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a naphthalene removal device for purifying coke oven gas. (Refer to...) Figures 1 to 5The naphthalene removal device for purifying coke oven gas includes a gas transfer tank 1, a gas guide pipe 2, a separation tank 3, a heating box 4, a lean oil spray assembly 5, and a rapid separation assembly 6. One side of the gas guide pipe 2 is installed at the bottom of the gas transfer tank 1, and the other side of the gas guide pipe 2 passes through the top of the separation tank 3 and is tightly fitted to the inner surface of the separation tank 3. The separation tank 3 is located outside the gas transfer tank 1, and the heating box 4 is located outside the separation tank 3. The bottom conveying end of the separation tank 3 is connected to the bottom of the heating box 4 through a pipe. The lean oil spray assembly 5 is installed outside the separation tank 3, and the rapid separation assembly 6 is installed inside the heating box 4.

[0028] A nitrogen tank 7 and a connecting pipe 8 are also provided on the outside of the separator 3. The top of the nitrogen tank 7 is connected to one side of the connecting pipe 8 through an exhaust valve. The other side of the connecting pipe 8 passes through the bottom of the separator 3 and is tightly fitted to the inner wall of the bottom of the separator 3.

[0029] During the nitrogen purging process, nitrogen is introduced into the bottom of the tank through the connecting pipe 8 to promote gas-liquid mixing and assist in purging residual components, preventing deposition.

[0030] The lean oil spray assembly 5 includes an oil storage tank 51, an annular pipe 53, spray heads 54, and an oil delivery pipe 55. The output end of the oil storage tank 51 is fixedly connected to the bottom of the oil delivery pipe 55. The annular pipe 53 is fixedly connected to the top outside of the oil delivery pipe 55. The spray heads 54 are arranged in annular array at the bottom of the annular pipe 53 in the separation tank 3.

[0031] During the lean oil spraying and dissolution absorption process, the lean oil spraying assembly 5 is started. The wash oil is transported from the oil storage tank 51 through the oil delivery pipe 55. The flow rate is controlled by the metering pump 10. After entering the annular pipe 53, it is evenly sprayed into the separator 3 through the annularly arranged spray heads 54 to dissolve and absorb the naphthalene in the coal gas.

[0032] The quick separation assembly 6 includes a swing frame 61, a support base 62, a rotating shaft 63, a paddle 64, a rotating cam 65, a DC motor 66, and a drive shaft 67. The swing frame 61 is movably connected inside the heating chamber 4. The support base 62 is fixedly connected to the bottom of the swing frame 61. The rotating shaft 63 is sleeved on the bottom of the support base 62. The paddle 64 is fixedly connected to the outside of the rotating shaft 63. The protruding end surface of the rotating cam 65 abuts against the surface of the paddle 64. The drive shaft 67 passes through the interior of the rotating cam 65 and is rotatably connected to the outside of the heating chamber 4. The output end of the DC motor 66 is fixedly connected to one end of the drive shaft 67.

[0033] The washing oil containing dissolved naphthalene is pumped to the heating tank 4 via a self-priming pump 11. Under heating conditions, solid naphthalene is converted into liquid, achieving separation of oil and naphthalene. During the separation and recovery process, the rapid separation component 6 is activated, and the DC motor 66 drives the transmission shaft 67 and the rotating cam 65, causing the paddle 64 to oscillate back and forth, accelerating the separation of naphthalene from the liquid. The vaporized naphthalene vapor, benzene vapor, nitrogen, and water vapor are recovered via the top feed pipe 12 equipped with a solenoid valve.

[0034] Inside the separator 3, several sets of wooden packing 9 are arranged at equal intervals to ensure full contact between the coal gas and the washing oil.

[0035] The tank is equipped with multiple layers of wooden grid packing 9 to enhance the contact area between the coal gas and the washing oil, thereby improving the mass transfer effect.

[0036] A metering pump 10 for controlling the amount of oil inlet is also installed on the outside of the oil pipeline 55 near the oil storage tank 51.

[0037] A self-priming pump 11 is installed on the outside of the gas duct 2 and the connecting pipes of the separator 3 and the heating box 4.

[0038] Several sets of electromagnetic valve-equipped feed pipes 12 are also installed on the top outer side of the heating box 4 for recovering vaporized naphthalene vapor, benzene vapor, nitrogen and water vapor.

[0039] The general process of using the naphthalene removal device for purifying coke oven gas in this embodiment of the application is as follows: Coke oven gas is first introduced into the separator 3 from the gas transfer tank 1 via the gas guide pipe 2. Here, the lean oil spray assembly 5 is activated, and the wash oil, under the precise control of the metering pump 10, is transported from the oil storage tank 51 through the oil delivery pipe 55 to the annular pipe 53, and finally uniformly sprayed through the annular array of spray nozzles 54. The sprayed wash oil comes into full contact with the rising gas in the wooden grid packing layer 9, effectively dissolving and absorbing the naphthalene in the gas. The rich oil mixture at the bottom of the separator 3 is transported to the heating box 4 by the self-priming pump 11. Simultaneously, nitrogen is injected into the system through the connecting pipe 8 from the nitrogen tank 7, serving as an auxiliary purging and stirring mechanism, helping to prevent solid deposition and promote mass transfer. In the heating box 4, the rich oil is heated to melt the naphthalene. Subsequently, the rapid separation assembly 6 begins operation; the DC motor 66 drives the rotating cam 65 through the drive shaft 67, which in turn drives the paddle 64 and the connected swing frame 61 to reciprocate, mechanically agitating the material and significantly improving the separation efficiency of oil and naphthalene. After separation, the vaporized naphthalene vapor, benzene vapor, and the mixture of nitrogen and water vapor are finally guided to the recovery system through the material pipe 12 with a solenoid valve at the top of the heating box 4, completing the entire purification and recovery process.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A naphthalene removal device for purifying coke oven gas, characterized by comprising: The system includes a gas transfer tank (1), a gas guide pipe (2), a separation tank (3), a heating box (4), a lean oil spray assembly (5), and a rapid separation assembly (6). One side of the gas guide pipe (2) is installed at the bottom of the gas transfer tank (1), and the other side of the gas guide pipe (2) passes through the top of the separation tank (3) and is in close contact with the inner surface of the separation tank (3). The separation tank (3) is located on the outside of the gas transfer tank (1), and the heating box (4) is located on the outside of the separation tank (3). The bottom conveying end of the separation tank (3) is connected to the bottom of the heating box (4) through a pipe. The lean oil spray assembly (5) is installed on the outside of the separation tank (3), and the rapid separation assembly (6) is installed inside the heating box (4).

2. The naphthalene removal device for purifying coke oven gas according to claim 1, characterized in that, A nitrogen tank (7) and a connecting pipe (8) are also provided on the outside of the separation tank (3). The top of the nitrogen tank (7) is connected to one side of the connecting pipe (8) through an exhaust valve. The other side of the connecting pipe (8) passes through the bottom of the separation tank (3) and is tightly fitted to the inner wall of the bottom of the separation tank (3).

3. The naphthalene removal device for purifying coke oven gas according to claim 1, characterized in that, The lean oil spray assembly (5) includes an oil storage tank (51), a circular pipe (53), a spray head (54), and an oil delivery pipe (55). The output end of the oil storage tank (51) is fixedly connected to the bottom of the oil delivery pipe (55). The circular pipe (53) is fixedly connected to the top outside of the oil delivery pipe (55). The spray head (54) is arranged in a ring array at the bottom of the circular pipe (53) in the separation tank (3).

4. The naphthalene removal device for purifying coke oven gas according to claim 1, characterized in that, The rapid separation assembly (6) includes a swing frame (61), a support base (62), a rotating shaft (63), a paddle (64), a rotating cam (65), a DC motor (66), and a drive shaft (67). The swing frame (61) is movably connected to the inside of the heating box (4). The support base (62) is fixedly connected to the bottom of the swing frame (61). The rotating shaft (63) is sleeved on the bottom of the support base (62). The paddle (64) is fixedly connected to the outside of the rotating shaft (63). The protruding end surface of the rotating cam (65) abuts against the surface of the paddle (64). The drive shaft (67) passes through the inside of the rotating cam (65) and is rotatably connected to the outside of the heating box (4). The output end of the DC motor (66) is fixedly connected to one end of the drive shaft (67).

5. The naphthalene removal device for purifying coke oven gas according to claim 3, characterized in that, The interior of the separator (3) is equipped with several sets of wooden grid packing (9) arranged at equal intervals to ensure full contact between the coal gas and the washing oil.

6. The naphthalene removal device for purifying coke oven gas according to claim 3, characterized in that, A metering pump (10) for controlling the amount of oil inlet is also provided on the outside of the oil pipeline (55) near the oil storage tank (51).

7. The naphthalene removal device for purifying coke oven gas according to claim 1, characterized in that, A self-priming pump (11) is installed on the outside of the air guide pipe (2), the connecting pipe of the separation tank (3) and the heating box (4).

8. The naphthalene removal device for purifying coke oven gas according to claim 1, characterized in that, The heating box (4) is also equipped with several sets of electromagnetic valve-equipped feed pipes (12) on the top outer side for recovering vaporized naphthalene vapor, benzene vapor, nitrogen and water vapor.

Images