A device for deep purification of coke oven gas
By installing a multi-layer filter box with multiple filter media at the gas-liquid separator inlet, the problem of equipment wear and blockage caused by large particulate impurities in coke oven gas is solved, achieving deep purification of coke oven gas and ensuring stable equipment operation and resource recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI FENGXI HUARUI COAL CHEM IND
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-31
AI Technical Summary
Existing gas-liquid separators cannot effectively prevent the entry of larger solid particles and liquid impurities when processing coke oven gas, leading to equipment wear, blockage, and system pressure imbalance, which affects purification efficiency and equipment lifespan.
A filter box is installed at the gas inlet of the gas-liquid separator. It contains a metal wire mesh, an activated carbon mesh, and a sintered metal mesh. The filter media intercepts large particulate impurities in the crude coal gas through multiple layers of filter media. The contaminated filter media is replaced regularly to maintain the filtration efficiency.
It effectively intercepts large particulate impurities in crude coal gas, protects the gas-liquid separator equipment, extends its service life, improves purification efficiency, prevents pipeline blockage, and reduces operating costs.
Smart Images
Figure CN224573414U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coke oven gas purification technology, specifically relating to a device for deep purification of coke oven gas. Background Technology
[0002] Coke oven gas is a mixed gas produced by the thermal decomposition of organic matter in coal during high-temperature dry distillation at 900-1100℃ in an air-isolated coke oven. Its main components are combustible elements such as hydrogen, methane, and carbon monoxide, while also containing impurities such as hydrogen sulfide, ammonia, naphthalene, and tar. The presence of these impurities poses several problems if coke oven gas is used directly: firstly, acidic gases such as hydrogen sulfide can corrode pipelines and equipment, shortening their lifespan; secondly, combustion releases pollutants such as sulfur dioxide, causing air pollution; and thirdly, impurities may affect the quality of the gas as fuel or chemical feedstock (e.g., reducing calorific value, interfering with chemical reactions). Therefore, deep purification is necessary to remove impurities to meet the purity and safety requirements of industrial fuels, hydrogen production, and synthetic chemical applications, while simultaneously achieving efficient resource utilization and environmental protection. Gas-liquid separators are key equipment in the coke oven gas purification process. They are mainly used to separate liquid impurities such as tar, ammonia, and condensate carried in the gas. Typically, they serve as a pretreatment stage after the crude gas is discharged, operating before precision processes such as desulfurization and benzene removal. This prevents liquid impurities from clogging or corroding subsequent equipment or affecting purification efficiency. Their significance lies in two aspects: firstly, separating liquid impurities ensures the stable operation of equipment such as desulfurization towers and compressors, improving the precision of desulfurization and benzene removal processes; secondly, they can efficiently recover liquid byproducts such as tar and ammonia for use in chemical production, reducing resource waste and lowering the risk of pollutant emissions during gas combustion. Furthermore, they can achieve energy savings by reducing system flow resistance and avoid catalyst poisoning, thus reducing operating costs. They are a core link connecting gas production and clean utilization, balancing efficiency and environmental protection. Existing gas-liquid separators can prevent liquid impurities from clogging or corroding downstream equipment or affecting purification efficiency after separating crude coal gas. However, the raw coke oven gas contains a large number of large solid particles (such as coke powder and coal powder) and liquid impurities (tar and condensate). If these substances directly enter the gas-liquid separator, they will not only accelerate the internal wear of the equipment and reduce the separation efficiency, but may also cause problems such as pipeline blockage and system pressure imbalance. Utility Model Content
[0003] The purpose of this invention is to provide a device for deep purification of coke oven gas. It aims to solve the problem that existing gas-liquid separators can avoid liquid impurities clogging, corroding downstream equipment, or affecting purification efficiency after separating crude gas. However, the raw coke oven gas contains a large number of large solid particles (such as coke powder and coal powder) and liquid impurities (tar and condensate). If these substances directly enter the gas-liquid separator, they will not only accelerate the internal wear of the equipment and reduce the separation efficiency, but may also cause problems such as pipeline blockage and system pressure imbalance.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for deep purification of coke oven gas, comprising a gas-liquid separator body, an air inlet connected to one side surface of the gas-liquid separator body, a connecting pipe connected to the open end of the air inlet by a bolt thread, a filter box connected to the other side surface of the connecting pipe, a threaded pipe connected to the other side surface of the filter box, a metal wire mesh inserted into the inner wall of the filter box, the upper surface of the metal wire mesh being snapped onto the inner wall of a top plate, a sealing ring adhered to the top surface of the top plate, and a metal wire mesh movably fitted onto the surface of the sealing ring. An activated carbon mesh is movably sleeved on the wall. The upper surface of the activated carbon mesh is engaged with the inner wall of the top plate, and the bottom of the activated carbon mesh is inserted into a groove at the bottom of the inner wall of the filter box. A sintered metal mesh is inserted into the groove at the bottom of the inner wall of the filter box, and the upper surface of the sintered metal mesh is engaged with the inner wall of the top plate. The surface of the sintered metal mesh is movably sleeved on the inner wall of the sealing ring. A sealing cover is fitted onto the top opening of the filter box. A box cover is sleeved on the top surface of the filter box, and a fixing bolt is threaded through the longitudinal end of the box cover and connected to the surface of the filter box.
[0005] As a preferred embodiment of the device for deep purification of coke oven gas according to this utility model, three sets of circular grooves are equally spaced at the bottom of the inner wall of the filter box, and the shape and size of the grooves are adapted to the bottom protrusions of the metal wire mesh, activated carbon mesh and sintered metal mesh.
[0006] As a preferred embodiment of the device for deep purification of coke oven gas according to this utility model, three sets of rectangular through slots are equally spaced on the surface of the top plate, and the shape and size of the through slots are adapted to the metal wire mesh, activated carbon mesh and sintered metal mesh.
[0007] As a preferred embodiment of the device for deep purification of coke oven gas according to this utility model, circular grooves are respectively opened on both sides of the upper surface of the metal wire mesh, activated carbon mesh and metal sintered mesh, and the circular grooves are adapted to the rubber blocks bonded to the through groove end of the top plate surface.
[0008] As a preferred embodiment of the device for deep purification of coke oven gas according to this utility model, the bottom of the sealing cover is provided with three sets of rectangular protrusions at equal intervals, and the shape and size of the protrusions are adapted to the through groove on the inner wall of the sealing ring.
[0009] As a preferred embodiment of the device for deep purification of coke oven gas according to this utility model, the filter box, the box cover and the fixing bolt form a threaded connection structure.
[0010] Compared with the prior art, the beneficial effects of this utility model are: Three sets of filter media installed in the filter box on one side of the gas-liquid separator body filter and intercept large particulate impurities carried in the crude coal gas entering the gas-liquid separator body for separation. This prevents them from directly entering the gas-liquid separator body and causing damage, which would affect the service life of the gas-liquid separator body. At the same time, since the filter media are easily contaminated, leading to a decrease in filtration efficiency, the three layers of filter media installed in the filter box are disassembled and maintained to ensure the filtration efficiency of the filter box. Attached Figure Description
[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic cross-sectional view of the filter box of this utility model; Figure 3 This is an exploded structural diagram of the top plate and metal wire mesh portion of this utility model; Figure 4 This is an enlarged structural diagram of the box lid and sealing cover of this utility model.
[0012] In the diagram: 1. Gas-liquid separator body; 2. Air inlet; 3. Connecting pipe; 4. Filter box; 5. Threaded pipe; 6. Metal wire mesh; 7. Top plate; 8. Sealing ring; 9. Activated carbon mesh; 10. Sintered metal mesh; 11. Sealing cover; 12. Box cover; 13. Fixing bolt. Detailed Implementation
[0013] 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.
[0014] Please see Figures 1-4This utility model provides the following technical solution: a device for deep purification of coke oven gas, comprising a gas-liquid separator body 1, an air inlet 2 connected to one side surface of the gas-liquid separator body 1, a connecting pipe 3 connected to the open end of the air inlet 2 by bolt thread, a filter box 4 connected to the other side surface of the connecting pipe 3, a threaded pipe 5 connected to the other side surface of the filter box 4, a metal wire mesh 6 inserted into the inner wall of the filter box 4, the upper surface of the metal wire mesh 6 being snapped onto the inner wall of the top plate 7, a sealing ring 8 bonded to the top surface of the top plate 7, the metal wire mesh 6 movably sleeved on the surface of the sealing ring 8, an activated carbon mesh 9 movably sleeved on the inner wall of the sealing ring 8, the upper surface of the activated carbon mesh 9 being snapped onto the inner wall of the top plate 7, and the bottom of the activated carbon mesh 9 being inserted into the bottom groove of the inner wall of the filter box 4, the filter box... A sintered metal mesh 10 is inserted into the groove at the bottom of the inner wall of the filter box 4. The upper surface of the sintered metal mesh 10 is snapped onto the inner wall of the top plate 7. The surface of the sintered metal mesh 10 is movably sleeved onto the inner wall of the sealing ring 8. The top surface of the sealing ring 8 is fitted with a sealing cover 11. The surface of the sealing cover 11 is sleeved onto the top opening of the filter box 4. The top surface of the filter box 4 is sleeved with a box cover 12. The longitudinal end surface of the box cover 12 is threaded onto the surface of the filter box 4 through a fixing bolt 13. In this design, the gas-liquid separator body 1 and the air inlet 2 constitute the main body of the gas-liquid separator. A large number of related components are set in the main body of the gas-liquid separator. Since they are existing technologies and the core content of this technical solution is irrelevant to them, they will not be described in detail in this technical solution. The main model of the gas-liquid separator in this solution is: BJAS double-baffle steam separator.
[0015] Preferably, three sets of circular grooves are equally spaced at the bottom of the inner wall of the filter box 4, and the shape and size of the grooves are adapted to the bottom protrusions of the metal wire mesh 6, activated carbon mesh 9 and sintered metal mesh 10.
[0016] In practical use, the protrusions at the bottom of the metal wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10 are inserted into the grooves opened inside the filter box 4, thereby fixing their positions inside the filter box 4.
[0017] Preferably, three sets of rectangular through slots are equally spaced on the surface of the top plate 7, and the shape and size of the through slots are adapted to the metal wire mesh 6, activated carbon mesh 9 and metal sintered mesh 10.
[0018] In practical use, the three sets of rectangular through slots on the surface of the top plate 7 facilitate the insertion of the metal wire mesh 6, activated carbon mesh 9 and sintered metal mesh 10, thereby filtering impurities in the crude coal gas entering the filter box 4.
[0019] Preferably, circular grooves are formed on both sides of the upper surface of the metal wire mesh 6, activated carbon mesh 9 and sintered metal mesh 10, and the circular grooves are adapted to the rubber blocks bonded to the through groove end of the top plate 7.
[0020] In practical use, the grooves on the surfaces of the wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10 are used to facilitate their insertion between the filter box 4 and the top plate 7. The rubber protrusions on the surface of the top plate 7 are used to engage with the surfaces of the wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10, thereby fixing their positions.
[0021] Preferably, the bottom of the sealing cover 11 is provided with three sets of rectangular protrusions at equal intervals, and the shape and size of the protrusions are adapted to the through groove on the inner wall of the sealing ring 8.
[0022] In practical use, the sealing cap 11 at the bottom of the box cover 12 is fitted into the inner wall of the sealing ring 8, thereby filling the gap between the top plate 7 and the box cover 12 and maintaining the airtightness between the filter box 4 and the box cover 12.
[0023] Preferably, the filter box 4, the box cover 12, and the fixing bolt 13 form a threaded connection structure.
[0024] In practical use, four sets of fixing bolts 13 are threadedly connected between the cover 12 and the filter box 4 to fix the cover 12 at the top of the filter box 4.
[0025] Working principle: During the deep purification of coke oven gas, the gas-liquid separator body 1 is used for pre-treatment of the crude gas after it is discharged. To prevent large particulate impurities in the crude gas from directly entering the gas-liquid separator body 1 and causing damage, thus affecting its working efficiency and service life, a connecting pipe 3 is connected to the air inlet 2 on one side of the gas-liquid separator body 1. This allows the threaded pipe 5 on the other side of the filter box 4 to connect with the crude gas discharge pipe, thus inputting the crude gas to be purified into the filter box 4. Larger particles carried in the crude coal gas (such as coke powder, rust, and large pieces of tar residue, typically >50μm in diameter) are intercepted by the metal wire mesh 6. Then, activated carbon mesh 9 and sintered metal mesh 10, sequentially inserted into the filter box 4 beside the metal wire mesh 6, intercept and filter even finer impurities in the filtered crude coal gas. Finally, the filtered coal gas enters the gas-liquid separator body 1 through the connected pipe 3, where it undergoes gas-liquid separation, facilitating subsequent purification processing. After long-term use, the gas can be periodically filtered when the gas flow stops. During filtration, unscrew the four fixing bolts 13 threaded between the filter box 4 and the box cover 12, then lift the sealing cover 11 abutting against the sealing ring 8 to expose the wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10 locked onto the top plate 7. Pull the wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10 onto the top plate 7 upwards in sequence to easily remove and replace the contaminated wire mesh 6, activated carbon mesh 9, and sintered metal mesh 10. Repeat the above operation to replace the new wire mesh 6 and activated carbon mesh. The metal wire mesh 9 and the sintered metal mesh 10 are sequentially snapped and fixed onto the top plate 7. At the same time, the protrusions at the bottom of the metal wire mesh 6, the activated carbon mesh 9, and the sintered metal mesh 10 are inserted into the grooves opened inside the filter box 4, thereby fixing their positions inside the filter box 4. Then, the sealing cap 11 at the bottom of the box cover 12 is fitted into the inner wall of the sealing ring 8. The rubber sealing cap 11 and the sealing ring 8 are used to fill the gap between the top plate 7 and the box cover 12, maintaining the airtightness between the filter box 4 and the box cover 12, thereby ensuring the subsequent filtration and transmission of crude gas pretreatment.
[0026] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A device for deep cleaning of coke oven gas, comprising a gas-liquid separator body (1), characterized in that: The gas-liquid separator body (1) has an air inlet (2) connected to one side surface. The opening end of the air inlet (2) is connected to a connecting pipe (3) by bolt thread. The other side surface of the connecting pipe (3) is connected to a filter box (4). The other side surface of the filter box (4) is connected to a threaded pipe (5). A metal wire mesh (6) is inserted into the inner wall of the filter box (4). The upper surface of the metal wire mesh (6) is snapped onto the inner wall of the top plate (7). A sealing ring (8) is bonded to the top surface of the top plate (7). The metal wire mesh (6) is movably sleeved on the surface of the sealing ring (8). An activated carbon mesh (9) is movably sleeved on the inner wall of the sealing ring (8). The upper surface of the activated carbon mesh (9) is snapped onto the top plate (7). The bottom of the activated carbon mesh (9) is inserted into the bottom groove of the inner wall of the filter box (4). The metal sintered mesh (10) is inserted into the bottom groove of the inner wall of the filter box (4). The upper surface of the metal sintered mesh (10) is snapped onto the inner wall of the top plate (7). The surface of the metal sintered mesh (10) is movably sleeved onto the inner wall of the sealing ring (8). The top surface of the sealing ring (8) is fitted with the sealing cover (11). The surface of the sealing cover (11) is sleeved onto the top opening end of the filter box (4). The top surface of the filter box (4) is sleeved with the box cover (12). The longitudinal end surface of the box cover (12) is threaded onto the surface of the filter box (4) by a fixing bolt (13).
2. The apparatus for deep purification of coke oven gas according to claim 1, characterized in that: The filter box (4) has three sets of circular grooves at equal intervals on the bottom of its inner wall, and the shape and size of the grooves are adapted to the bottom protrusions of the wire mesh (6), activated carbon mesh (9) and sintered metal mesh (10).
3. A device for deep cleaning of coke oven gas according to claim 2, characterized in that: The top plate (7) has three sets of rectangular through slots at equal intervals on its surface, and the shape and size of the through slots are adapted to the metal wire mesh (6), activated carbon mesh (9) and metal sintered mesh (10).
4. A device for deep cleaning of coke oven gas according to claim 3, characterized in that: The upper surfaces of the metal wire mesh (6), activated carbon mesh (9) and metal sintered mesh (10) are respectively provided with circular grooves, and the circular grooves are adapted to the rubber blocks bonded to the through groove end of the top plate (7).
5. A device for deep cleaning of coke oven gas according to claim 1, characterized in that: The bottom of the sealing cap (11) is provided with three sets of rectangular protrusions at equal intervals, and the shape and size of the protrusions are adapted to the through groove on the inner wall of the sealing ring (8).
6. The apparatus for deep purification of coke oven gas according to claim 1, characterized in that: The filter box (4), the box cover (12), and the fixing bolt (13) form a threaded connection structure.