Tar gas wet desulfurization device

Abstract

The utility model discloses a tar coal gas wet desulphurization device, including desulfurizing tower, reaction purification equipment, diffusion mechanism, cleaning mechanism, slow flow mechanism and air intake mechanism, the diffusion mechanism includes diffusion disc, the diffusion disc rotates and is installed in the inner upper portion of desulfurizing tower through the pivot, the inboard surface of diffusion disc is fixedly installed with several groups of baffle, the surface of diffusion disc is passed through and is equipped with several groups of diffusion mesh, the inner upper portion of desulfurizing tower is fixedly installed with two groups of conveying pipeline, the slow flow mechanism includes upper fixed plate, lower fixed plate and spiral fairlead, spiral fairlead is fixedly installed in the inside of desulfurizing tower through upper fixed plate. The utility model discloses through setting up slow flow mechanism, has prolonged the desulfurizing liquid flow path significantly, makes desulfurizing liquid and tar coal gas form multistage cross contact, effectively increases reaction time and contact area, has solved the problem that traditional spraying mode is uneven, and the contact time is short.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization equipment technology, and in particular to a wet desulfurization equipment for coal tar gas. Background Technology

[0002] The wet desulfurization unit for coal tar gas is an environmentally friendly device used to purify hydrogen sulfide (H2S) from coal gas or coke oven gas, primarily applied in coking, coal chemical, and other fields. Its working principle involves using an alkaline absorbent solution in a packed tower or spray tower to countercurrently contact sulfur-containing coal gas, causing the H2S to be chemically absorbed and converted into sulfides. The desulfurized coal gas then enters subsequent processes, while the sulfur-rich absorbent solution undergoes regeneration to recover sulfur or sulfate byproducts, achieving the recycling of sulfur resources. This technology features high desulfurization efficiency and stable operation, effectively reducing sulfur dioxide emissions and meeting environmental protection requirements.

[0003] Currently, wet desulfurization units for coal tar gas typically employ a counter-current contact design. The desulfurization liquid is sprayed downwards from the top of the desulfurization tower, while the coal tar gas enters from the bottom and flows upwards. The two gases achieve the desulfurization reaction through convection. However, traditional desulfurization towers often use fixed spray or static packing structures. The desulfurization liquid falls rapidly under gravity, resulting in a short and uneven flow path. This leads to insufficient effective contact time and limited contact area between the liquid and the coal tar gas, thus affecting desulfurization efficiency. Utility Model Content

[0004] One objective of this invention is to provide a wet desulfurization device for coal tar gas. This invention addresses the problem mentioned in the background that traditional desulfurization towers often employ fixed spray or static packing structures, causing the desulfurization liquid to fall rapidly under gravity, resulting in a short and uneven flow path, insufficient effective contact time and limited contact area with the coal tar gas, thus affecting desulfurization efficiency.

[0005] A wet desulfurization device for coal gas tar according to an embodiment of the present invention includes a desulfurization tower, a reaction purification device, a diffusion mechanism, a cleaning mechanism, a slowing flow mechanism, and an inlet mechanism. The diffusion mechanism includes a diffusion disk, which is rotatably installed in the upper inner part of the desulfurization tower via a rotating shaft. Several sets of baffles are fixedly installed on the inner surface of the diffusion disk, and several sets of diffusion mesh holes are opened through the surface of the diffusion disk. Two sets of conveying pipes are fixedly installed through the upper inner part of the desulfurization tower. The slowing flow mechanism includes an upper fixed plate, a lower fixed plate, and a spiral guide plate. The spiral guide plate is fixedly installed inside the desulfurization tower via the upper fixed plate, and the lower fixed plate is fixedly installed in the lower inner part of the desulfurization tower.

[0006] Preferably, a first support leg is fixedly installed on the lower surface of the desulfurization tower, a reaction purification device is fixedly installed on the lower side of the desulfurization tower through an outflow pipe, one end of the conveying pipe is fixedly installed on the surface of the reaction purification device, and a second support leg is fixedly installed on the lower surface of the reaction purification device.

[0007] Preferably, the reaction purification equipment includes a rich liquid tank, a regeneration tank, a sulfur foam tank, a sulfur melting kettle, a lean liquid tank, a circulating pump, a filter, and a cooler.

[0008] Preferably, the conveying pipes are arranged obliquely on both sides of the upper part of the diffuser.

[0009] Preferably, the cleaning mechanism includes a scraper, and a fixing rod is fixedly installed on the lower surface of the diffusion disk. The scraper is movably installed on the outside of the fixing rod by a spring structure.

[0010] Preferably, a drain outlet is provided through the surface of the upper fixing plate.

[0011] Preferably, the surface of the lower fixing plate is provided with an inclined surface.

[0012] Preferably, the air intake mechanism includes an air intake pipe and a U-shaped pipe, wherein the air intake pipe is fixedly installed through the upper part of the lower fixed plate, and the U-shaped pipe is fixedly installed at the upper end of the air intake pipe.

[0013] The beneficial effects of this utility model are: This invention utilizes a slow-flow mechanism. After the desulfurization liquid is sprayed downwards through the conveying pipe, it is first diffused by a diffusion mechanism and then evenly sprayed onto the surface of the upper fixed plate. As the tar gas entering the desulfurization tower through the air inlet mechanism flows upwards, it comes into full contact with the desulfurization liquid on the surface of the upper fixed plate. Simultaneously, excess desulfurization liquid on the surface of the upper fixed plate flows downwards through the water outlet and is guided by a spiral guide plate, allowing the tar gas to come into full contact with the desulfurization liquid again during its upward flow. This significantly extends the flow path of the desulfurization liquid, enabling multi-stage cross-contact between the desulfurization liquid and the tar gas, effectively increasing the reaction time and contact area, and solving the problems of uneven distribution and short contact time in traditional spraying methods. This utility model, through its diffusion mechanism, causes the desulfurization liquid to rotate around its axis as it impacts the baffle on the surface of the diffusion disk through the conveying pipe. This allows the desulfurization liquid falling onto the surface of the diffusion disk to spread outwards through the centrifugal force of the diffusion disk and be evenly sprayed downwards through the diffusion mesh, significantly improving the coverage area and distribution uniformity of the desulfurization liquid and solving the problem of uneven coverage in traditional fixed spraying. This utility model, through its cleaning mechanism, diffuses the desulfurization liquid while simultaneously rotating the diffusion plate, causing the scraper to rotate and cleaning the upper surface of the inner wall of the desulfurization tower. Furthermore, the spring structure prevents the scraper from being blocked from rotating when it encounters tightly adhered and hard impurities, thus preventing the diffusion mechanism from malfunctioning. By automatically cleaning scale from the tower wall while diffusing the desulfurization liquid, it prevents impurities from accumulating and affecting operation, and avoids hard scale from jamming the equipment, achieving simultaneous desulfurization and cleaning. This utility model, through its air intake mechanism, allows tar gas to flow upwards into the desulfurization tower via the air intake pipe. The U-shaped pipe effectively prevents the desulfurization liquid above from flowing into the air intake pipe, ensuring smooth flow of tar gas while effectively preventing the desulfurization liquid from flowing back into the pipe. This avoids the risk of gas blockage and ensures the stability of gas delivery. Attached Figure Description

[0014] 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 structure of a wet desulfurization device for tar gas proposed in this utility model; Figure 2 This is a cross-sectional view of the internal structure of the desulfurization tower in a wet desulfurization device for tar gas proposed in this utility model; Figure 3 This is a schematic diagram of the internal structure of the desulfurization tower in a wet desulfurization device for tar gas proposed in this utility model. Figure 4 This utility model proposes a wet desulfurization device for coal tar gas. Figure 3 Enlarged view of point A in the middle; In the diagram: 1. Desulfurization tower; 2. First support leg; 3. Reaction purification equipment; 4. Second support leg; 5. Conveying pipeline; 6. Diffusion mechanism; 601. Diffusion disk; 602. Rotating shaft; 603. Diffusion mesh; 604. Baffle; 7. Cleaning mechanism; 701. Fixing rod; 702. Scraper; 703. Spring structure; 8. Flow control mechanism; 801. Upper fixing plate; 802. Spiral guide plate; 803. Lower fixing plate; 804. Inclined surface; 805. Outflow pipeline; 806. Water outlet; 9. Air inlet mechanism; 901. Air inlet pipeline; 902. U-shaped pipe. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] refer to Figure 1-4 A wet desulfurization device for coal tar gas includes a desulfurization tower 1, a reaction purification device 3, a diffusion mechanism 6, a cleaning mechanism 7, a slowing flow mechanism 8, and an inlet mechanism 9. The diffusion mechanism 6 includes a diffusion disk 601, which is rotatably installed in the upper inner part of the desulfurization tower 1 via a rotating shaft 602. Several sets of baffles 604 are fixedly installed on the inner surface of the diffusion disk 601, and several sets of diffusion mesh holes 603 are opened through the surface of the diffusion disk 601. Two sets of conveying pipes 5 are fixedly installed through the upper inner part of the desulfurization tower 1. The slowing flow mechanism 8 includes an upper fixed plate 801, a lower fixed plate 803, and a spiral guide plate 802. The spiral guide plate 802 is fixedly installed inside the desulfurization tower 1 via the upper fixed plate 801, and the lower fixed plate 803 is fixedly installed in the desulfurization tower 1. In the lower part of the tower, after the desulfurization liquid is sprayed downward through the conveying pipe 5 via the slow flow mechanism 8, the desulfurization liquid is first diffused by the diffusion mechanism 6 and then evenly sprayed onto the surface of the upper fixed plate 801. When the tar gas entering the desulfurization tower 1 through the air intake mechanism 9 flows upward, it comes into full contact with the desulfurization liquid on the surface of the upper fixed plate 801. At the same time, the excess desulfurization liquid on the surface of the upper fixed plate 801 flows downward through the water flow hole and is guided by the spiral guide plate 802, so that the tar gas comes into full contact with the desulfurization liquid again during the upward flow. This significantly extends the flow path of the desulfurization liquid and makes the desulfurization liquid and tar gas form multi-level cross contact, effectively increasing the reaction time and contact area, and solving the problems of uneven distribution and short contact time in the traditional spraying method.

[0017] Example 1: A first support leg 2 is fixedly installed on the lower surface of the desulfurization tower 1. A reaction purification device 3 is fixedly installed on the lower side of the desulfurization tower 1 through an outlet pipe 805. One end of the conveying pipe 5 is fixedly installed on the surface of the reaction purification device 3. A second support leg 4 is fixedly installed on the lower surface of the reaction purification device 3. The reaction purification device 3 includes a rich liquid tank, a regeneration tank, a sulfur foam tank, a sulfur melting kettle, a lean liquid tank, a circulating pump, a filter, and a cooler. The conveying pipe 5 is obliquely arranged on both sides of the upper part of the diffuser plate 601. Through the provided diffusion mechanism 6, the desulfurization liquid impacts the baffle 604 on the surface of the diffuser plate 601 through the conveying pipe 5, causing the diffuser plate 601 to rotate around the rotating shaft 602. The desulfurization liquid falling into the surface of the diffuser plate 601 is dispersed to the surroundings by the centrifugal force of the diffuser plate 601 and sprayed evenly downwards through the diffusion mesh 603, which greatly improves the coverage area and distribution uniformity of the desulfurization liquid and solves the problem of uneven coverage of traditional fixed spraying.

[0018] Example 2: The cleaning mechanism 7 includes a scraper 702. A fixing rod 701 is fixedly installed on the lower surface of the diffuser 601. The scraper 702 is movably installed on the outside of the fixing rod 701 via a spring structure 703. Through the cleaning mechanism 7, while the desulfurization liquid is diffused by the diffuser 6, the rotation of the diffuser 601 drives the scraper 702 to rotate, thus cleaning the upper surface of the inner wall of the desulfurization tower 1. Simultaneously, the spring structure 703 prevents the scraper 702 from being blocked from rotating when it encounters tightly adhered and hard impurities, thus preventing the diffuser 6 from malfunctioning. This automatically cleans the scale on the tower wall while diffusing the desulfurization liquid, preventing impurities from accumulating and affecting operation, and avoiding hard scale from jamming the equipment. To ensure simultaneous desulfurization and cleaning, a water outlet 806 is provided through the surface of the upper fixed plate 801, and an inclined surface 804 is provided on the surface of the lower fixed plate 803. The air intake mechanism 9 includes an air intake pipe 901 and a U-shaped pipe 902. The air intake pipe 901 is fixedly installed through the upper part of the lower fixed plate 803, and the U-shaped pipe 902 is fixedly installed at the upper end of the air intake pipe 901. Through the air intake mechanism 9, when the tar gas is introduced into the desulfurization tower 1 through the air intake pipe 901, the U-shaped pipe 902 can effectively prevent the desulfurization liquid above from flowing into the air intake pipe 901. While ensuring the smooth flow of tar gas, it effectively prevents the desulfurization liquid from flowing back into the pipe, thus avoiding the risk of gas blockage and ensuring the stability of gas transportation.

[0019] During operation, tar gas enters the desulfurization tower 1 through the inlet pipe 901 above the lower fixed plate 803, and the U-shaped pipe 902 effectively prevents the backflow of desulfurization liquid. Simultaneously, the desulfurization liquid in the lean liquid tank of the reaction purification equipment 3 is pumped to the inclined conveying pipe 5 by a circulating pump, and impacts the baffle 604 inside the diffuser 601 with a certain pressure. The impact force drives the diffuser 601 to rotate around the rotating shaft 602, and under centrifugal force, the desulfurization liquid is evenly sprayed through the diffusion mesh 603. When the diffuser 601 rotates, it drives the scraper 702 on the fixed rod 701 to rotate synchronously. The spring structure 703 allows the scraper 702 to elastically contract when encountering hard scale, both cleaning the tower wall and preventing jamming. The desulfurization liquid, after being diffused... After being dispersed, the desulfurized liquid evenly covers the surface of the upper fixed plate 801, and reacts with the rising tar gas in the first contact. Excess liquid flows down through the outlet 806. The downward-flowing desulfurized liquid forms a swirling flow along the spiral guide plate 802, forming a secondary counter-current contact with the gas. The spiral guide plate 802 extends the contact path. The rich liquid after the reaction is guided by the inclined surface 804 of the lower fixed plate 803 and enters the reaction purification equipment 3 through the outlet pipe 805. After being temporarily stored in the rich liquid tank, it enters the regeneration tank for oxidation and regeneration. Sulfur foam enters the sulfur foam tank for separation, and sulfur is recovered in the sulfur melting kettle. The regenerated desulfurized liquid is purified by the lean liquid tank and filter and then sent back to the system by the circulation pump. After the temperature is adjusted by the cooler, the desulfurized liquid re-enters the conveying pipe 5 for recycling. The entire process achieves uniform distribution of desulfurized liquid through the diffusion mechanism 6, establishes multi-stage contact through the slow flow mechanism 8, removes scale simultaneously through the cleaning mechanism 7, and prevents backflow through the air intake mechanism 9, forming a highly efficient continuous desulfurization circulation system.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wet desulfurization device for coal tar gas, characterized in that, The system includes a desulfurization tower (1), a reaction purification device (3), a diffusion mechanism (6), a cleaning mechanism (7), a slow-flow mechanism (8), and an air inlet mechanism (9). The diffusion mechanism (6) includes a diffusion disk (601), which is rotatably installed in the upper part of the desulfurization tower (1) via a rotating shaft (602). Several sets of baffles (604) are fixedly installed on the inner surface of the diffusion disk (601). Several sets of diffusion mesh holes (603) are opened through the surface of the diffusion disk (601). Two sets of conveying pipes (5) are fixedly installed through the upper part of the desulfurization tower (1). The slow-flow mechanism (8) includes an upper fixed plate (801), a lower fixed plate (803), and a spiral guide plate (802). The spiral guide plate (802) is fixedly installed inside the desulfurization tower (1) via the upper fixed plate (801), and the lower fixed plate (803) is fixedly installed in the lower part of the desulfurization tower (1).

2. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The lower surface of the desulfurization tower (1) is fixedly installed with a first support leg (2), and a reaction purification device (3) is fixedly installed on one side of the lower part of the desulfurization tower (1) through an outlet pipe (805). One end of the conveying pipe (5) is fixedly installed on the surface of the reaction purification device (3), and a second support leg (4) is fixedly installed on the lower surface of the reaction purification device (3).

3. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The reaction purification equipment (3) includes a rich liquid tank, a regeneration tank, a sulfur foam tank, a sulfur melting kettle, a lean liquid tank, a circulating pump, a filter, and a cooler.

4. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The conveying pipe (5) is obliquely arranged on both sides of the upper part of the diffuser plate (601).

5. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The cleaning mechanism (7) includes a scraper (702), and a fixing rod (701) is fixedly installed on the lower surface of the diffuser (601). The scraper (702) is movably installed on the outside of the fixing rod (701) by a spring structure (703).

6. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The surface of the upper fixing plate (801) is provided with a water outlet (806).

7. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The surface of the lower fixing plate (803) is provided with an inclined surface (804).

8. The wet desulfurization device for coal tar gas according to claim 1, characterized in that, The air intake mechanism (9) includes an air intake pipe (901) and a U-shaped pipe (902). The air intake pipe (901) is fixedly installed through the upper part of the lower fixed plate (803), and the U-shaped pipe (902) is fixedly installed at the upper end of the air intake pipe (901).

Images