A coal gas purification and separation device at the bottom of a desulfurization tower
Patent Information
- Application Number
- CN202522778935.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-12-29
AI Technical Summary
[0012]本实用新型运行时，脱硫后的煤气在中央煤气管道内自上而下流动，然后分成多股，分别流入各根连接管，再流入各个文氏管，在文氏管内，对煤气中的微小液滴进行聚合，形成体积较大的大液滴，而煤气中的杂质也会粘附到液滴上，带有液滴的煤气流入汇气室后，再经切向设置的出气管排出，排入竖筒内后形成向上流动的旋流，利用离心力将大液滴和杂质分离出来，干净的煤气最终从排气管排出。在本实用新型中，设置了多个文氏管，当煤气从中央煤气管道的下端流出后，分成了多股，分别经连接管后进入各个文氏管，含有液滴等杂质的煤气进入文氏管的收缩段，速度急剧增加，在最窄的喉部，煤气速度达到顶峰，在如此高的速度下，煤气具有巨大的动能，会猛烈地冲击、剪切并粉碎原本较大的液滴，被加速到极高速度的微小雾滴和粉尘颗粒，在喉部这个狭窄的通道里以不同的轨迹和惯性运动，彼此之间发生剧烈的碰撞，通过这些频繁、剧烈的碰撞，微小的雾滴聚合在一起，合并成更大的液滴，且由于每个文氏管的直径都很小，壁面效应的影响相对更大，使得整个文氏管截面内的速度分布更为均匀，几乎所有的煤气都可以以接近设计的高速度通过文氏管喉部；其次，本实用新型利用离心力将煤气中的液滴和杂质甩出去，然后沿竖筒侧壁下落，汇集后从排液管落到下液锥排出，运行一段时间后，在竖筒的侧壁上可能会粘附较多的粘稠物，此时，可启动电机，电机带动螺杆转动，进而带动刮板上下移动，在移动过程中，刮板的外侧面将粘附的粘稠物刮落，达到清理竖筒侧壁的作用，整个清理过程高效快速，且还可实现在线清理，不需停机，也不需人工处理，清理过程简单快捷，能有效防止粘稠物在竖筒侧壁上聚集。综上所述，本实用新型具有捕集效率高，分离效果好，容易清洗的优点。
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Figure CN224784088U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coal gas purification and separation equipment, specifically to a coal gas purification and separation device at the bottom of a desulfurization tower. Background Technology
[0002] In oxidative desulfurization units for coal gas purification, the desulfurized coal gas often contains a large number of desulfurization liquid droplets. These droplets accumulate in the gas pipeline, the packing of the subsequent coal gas scrubbing tower, the liquid distributor, and the mist eliminator, making cleaning extremely difficult. Accumulation to a certain extent can clog the packing and mist eliminator, and also affect the uniform distribution of the liquid, adversely impacting the coal gas purification process. Currently, to improve the overall stress structure of the tower equipment, large desulfurization towers generally employ a built-in central coal gas pipeline and a packing mist eliminator layer to remove entrained mist in the coal gas. This method generally suffers from low collection efficiency, poor separation effect, and difficulty in cleaning, failing to meet the requirements for droplet separation in the coal gas and hindering coal gas purification. Therefore, developing a desulfurization tower bottom coal gas purification and separation device with high collection efficiency, good separation effect, and easy cleaning is objectively necessary. Utility Model Content
[0003] The purpose of this invention is to provide a gas purification and separation device at the bottom of a desulfurization tower that has high capture efficiency, good separation effect, and is easy to clean.
[0004] The purpose of this utility model is achieved as follows: It includes a desulfurization tower and a central gas pipeline installed inside the desulfurization tower. A blocking plate is installed at the bottom of the central gas pipeline, and multiple connecting pipes are evenly distributed on the blocking plate. Each connecting pipe has a Venturi tube connected to its lower end. A vertical cylinder is connected to the lower part of the central gas pipeline via a top plate. A lower liquid cone is connected to the lower end of the vertical cylinder, and the lower end of the lower liquid cone communicates with the bottom of the desulfurization tower. A baffle plate is installed in the lower part of the vertical cylinder, and a gas collecting chamber is installed on the baffle plate. The bottom of the gas collecting chamber communicates with the internal space of the vertical cylinder, and the lower end of the Venturi tube communicates with the top of the gas collecting chamber. Multiple gas outlet pipes are tangentially installed on the side wall of the gas collecting chamber. A drain pipe communicating with the lower liquid cone is installed on the baffle plate. An exhaust pipe is installed in the upper part of the vertical cylinder. An annular scraper is installed inside the vertical cylinder, with its outer side contacting the inner side wall of the vertical cylinder. Threaded holes are machined on the scraper, and screws are connected to the threaded holes. The lower end of the screw is rotatably connected to the baffle plate, and its upper end is driven by a motor installed on the top plate.
[0005] Furthermore, annular nozzles are provided above and below the scraper, and an inlet pipe is provided on the top plate, which is connected to the annular nozzles via a flexible hose.
[0006] Furthermore, a liquid level sensor is installed at the bottom of the vertical cylinder, and a drain solenoid valve is installed on the drain pipe.
[0007] Furthermore, the scraper is machined with through holes, and a guide rod is inserted through the through holes. The lower end of the guide rod is fixedly connected to the partition plate, and the upper end of the guide rod is fixedly connected to the top plate.
[0008] Furthermore, the venturi tube includes a constriction section, a throat, and a diffusion section connected sequentially from top to bottom. An infusion ring is provided on the outside of the venturi tube, and the infusion ring is connected to the bottom of the constriction section of each venturi tube through branch pipes. An infusion tube is connected to the infusion ring.
[0009] Furthermore, each connecting pipe is equipped with a regulating solenoid valve.
[0010] Furthermore, an impact plate is installed in the gas collection chamber below each venturi tube, and the impact plate is fixed in the gas collection chamber by a connecting rod.
[0011] Furthermore, the upper surface of the impact plate is provided with several spikes.
[0012] When this invention is in operation, the desulfurized coal gas flows from top to bottom in the central coal gas pipeline, then splits into multiple streams, which flow into each connecting pipe and then into each Venturi tube. In the Venturi tube, the tiny droplets in the coal gas are aggregated to form larger droplets, and impurities in the coal gas also adhere to the droplets. The coal gas with droplets flows into the gas collection chamber and then is discharged through the tangentially set gas outlet pipe. After being discharged into the vertical cylinder, it forms an upward swirling flow, which uses centrifugal force to separate the large droplets and impurities. The clean coal gas is finally discharged from the exhaust pipe. In this invention, multiple Venturi tubes are incorporated. When the gas flows out from the lower end of the central gas pipeline, it splits into multiple streams, which then enter individual Venturi tubes via connecting pipes. Gas containing droplets and other impurities enters the constricted section of the Venturi tube, where its velocity increases dramatically. At the narrowest point, the gas velocity reaches its peak. At such high speeds, the gas possesses enormous kinetic energy, violently impacting, shearing, and pulverizing the originally larger droplets. These accelerated micro-droplets and dust particles move along different trajectories and with inertia within the narrow throat, colliding violently with each other. Through these frequent and intense collisions, the micro-droplets coalesce into larger droplets. Furthermore, due to the small diameter of each Venturi tube, the wall effect is relatively greater. This design ensures a more uniform velocity distribution throughout the venturi cross-section, allowing almost all gas to pass through the venturi throat at near-design high speeds. Secondly, this invention utilizes centrifugal force to eject droplets and impurities from the gas, which then fall along the side wall of the vertical cylinder, collect, and drain from the outlet pipe into the lower cone. After a period of operation, a significant amount of viscous material may adhere to the side wall of the vertical cylinder. At this point, the motor can be started, driving the screw to rotate, which in turn moves the scraper up and down. During this movement, the outer surface of the scraper scrapes off the adhered viscous material, effectively cleaning the side wall of the vertical cylinder. The entire cleaning process is highly efficient and fast, and can be performed online without stopping the machine or requiring manual intervention. The cleaning process is simple and quick, effectively preventing the accumulation of viscous material on the side wall of the vertical cylinder. In summary, this invention has the advantages of high collection efficiency, good separation effect, and easy cleaning. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; In the diagram: 1-Desulfurization tower, 2-Central gas pipeline, 3-Connecting pipe, 4-Venturi tube, 5-Top plate, 6-Vertical cylinder, 7-Lower liquid cone, 8-Baffle plate, 9-Gas collection chamber, 10-Drain pipe, 11-Exhaust pipe, 12-Scraper, 13-Screw, 14-Motor, 15-Annular nozzle, 16-Hose, 17-Drain solenoid valve, 18-Guide rod, 19-Liquid delivery ring pipe, 20-Liquid inlet pipe, 21-Regulating solenoid valve, 22-Impact plate, 23-Spike, 24-Level sensor. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.
[0015] like Figure 1 As shown, this utility model includes a desulfurization tower 1 and a central gas pipeline 2 installed inside the desulfurization tower 1. A blocking plate is installed at the bottom of the central gas pipeline 2, and multiple connecting pipes 3 are evenly distributed on the blocking plate. Each connecting pipe 3 has a Venturi tube 4 connected to its lower end. A vertical cylinder 6 is connected to the lower part of the central gas pipeline 2 via a top plate 5. A lower liquid cone 7 is connected to the lower end of the vertical cylinder 6, and the lower end of the lower liquid cone 7 communicates with the bottom of the desulfurization tower 1. A baffle 8 is installed in the lower part of the vertical cylinder 6, and a gas collecting chamber 9 is installed on the baffle 8. The bottom of the gas collecting chamber 9 is connected to the vertical cylinder 6 via a leakage hole. The internal space of the desulfurization tower 1 is interconnected. The lower end of the Venturi tube 4 is connected to the top of the gas collection chamber 9. Multiple gas outlet pipes are tangentially arranged on the side wall of the gas collection chamber 9. A drain pipe 10 connected to the lower liquid cone 7 is provided on the partition plate 8. An exhaust pipe 11 is provided on the upper part of the vertical cylinder 6. An annular scraper 12 is provided inside the vertical cylinder 6. The outer side of the scraper 12 contacts the inner side wall of the vertical cylinder 6. A threaded hole is machined on the scraper 12. A screw 13 is connected to the threaded hole. The lower end of the screw 13 is rotatably connected to the partition plate 8, and the upper end is driven by the motor 14 installed on the top plate 5. This utility model makes full use of the space of the central gas pipeline 2 at the bottom of the desulfurization tower 1 and integrates it with the central gas pipeline 2 located at the bottom of the desulfurization tower 1. The overall structure is compact and realizes the purification and separation of gas.
[0016] When this utility model is in operation, the desulfurized coal gas flows from top to bottom in the central coal gas pipeline 2, and then splits into multiple streams, which flow into each connecting pipe 3 and then into each Venturi tube 4. In the Venturi tube 4, the tiny droplets in the coal gas are aggregated to form larger droplets, and the impurities in the coal gas also adhere to the droplets. The coal gas with droplets flows into the gas collection chamber 9 and then is discharged through the tangentially set gas outlet pipe. After being discharged into the vertical cylinder 6, it forms an upward swirling flow. Centrifugal force is used to separate the large droplets and impurities, and the clean coal gas is finally discharged from the exhaust pipe 11.
[0017] In this invention, multiple Venturi tubes 4 are provided. When the gas flows out from the lower end of the central gas pipeline 2, it splits into multiple streams, which enter each Venturi tube 4 after passing through the connecting pipe 3. The gas containing impurities such as droplets enters the constriction section of the Venturi tube 4, where its velocity increases sharply. At the narrowest throat, the gas velocity reaches its peak. At such a high velocity, the gas has enormous kinetic energy, which violently impacts, shears, and pulverizes the originally larger droplets. The tiny droplets and dust particles, accelerated to extremely high speeds, move along different trajectories and with inertia in the narrow channel of the throat, colliding violently with each other. Through these frequent and violent collisions, the tiny droplets aggregate together, merging into larger droplets. Furthermore, because the diameter of each Venturi tube 4 is very small, the wall effect is relatively greater, making the entire Venturi tube 4 cross section... The velocity distribution within the surface is more uniform, allowing almost all the gas to pass through the throat of the Venturi tube 4 at near-design high speed, ensuring working efficiency. Secondly, this invention utilizes centrifugal force to throw out droplets and impurities in the gas, which then fall along the side wall of the vertical cylinder 6, collect, and fall from the drain pipe 10 to the lower liquid cone 7 for discharge. After running for a period of time, a lot of viscous material may adhere to the side wall of the vertical cylinder 6. At this time, the motor 14 can be started, which drives the screw 13 to rotate, thereby driving the scraper 12 to move up and down. During the movement, the outer side of the scraper 12 scrapes off the adhered viscous material, achieving the effect of cleaning the side wall of the vertical cylinder 6. The entire cleaning process is efficient and fast, and online cleaning can also be achieved without stopping the machine or manual handling. The cleaning process is simple and quick, and can effectively prevent viscous material from accumulating on the side wall of the vertical cylinder 6.
[0018] Annular nozzles 15 are provided above and below the scraper 12. An inlet pipe is provided on the top plate 5. The inlet pipe is connected to the annular nozzles 15 through a hose 16. The scraper 12 moves up and down to scrape off the viscous material adhering to the vertical cylinder 6. At the same time, cleaning fluid is introduced into the inlet pipe. The cleaning fluid is introduced into the annular nozzles 15 through the hose 16 and then sprayed from the annular nozzles 15 onto the vertical cylinder 6 to assist the scraper 12 in cleaning the viscous material on the vertical cylinder 6.
[0019] A liquid level sensor 24 is installed at the lower part of the vertical cylinder 6, and a liquid discharge solenoid valve 17 is installed on the drain pipe 10. During operation, when the liquid discharge solenoid valve 17 is closed, the liquid and impurities separated from the gas will continuously fall onto the baffle 8 and accumulate on the baffle 8. When the liquid level reaches a certain height, it may affect the gas discharge from the gas outlet pipe. To avoid this problem, the liquid discharge solenoid valve 17 is opened to discharge the accumulated liquid.
[0020] The scraper 12 has a through hole, through which a guide rod 18 is inserted. The lower end of the guide rod 18 is fixedly connected to the partition plate 8, and the upper end of the guide rod 18 is fixedly connected to the top plate 5. In this utility model, the motor 14 drives the screw 13 to rotate. When the screw 13 rotates, it drives the scraper 12 to move up and down. During use, the annular scraper 12 may experience problems such as skewing or jamming. To solve this problem, the guide rod 18 is set to guide and position the scraper 12, making the scraper 12 move more smoothly and stably during its up and down movement.
[0021] The venturi tube 4 includes a contraction section, a throat, and a diffusion section connected sequentially from top to bottom. A liquid delivery loop 19 is provided on the outside of the venturi tube 4. The liquid delivery loop 19 is connected to the bottom of the contraction section of each venturi tube 4 through branch pipes. An inlet pipe 20 is connected to the liquid delivery loop 19. During operation, cleaning fluid for coal gas can be delivered to the liquid delivery loop 19 through the inlet pipe 20. The cleaning fluid is sent to the bottom of the contraction section of each venturi tube 4 through the branch pipe and enters the throat. The tiny droplets and dust particles accelerated to extremely high speeds move with different trajectories and inertia in the narrow channel of the throat, and collide violently with each other. At the same time, the high-speed droplets also collide with the injected cleaning fluid droplets. Through these frequent and violent collisions, the tiny droplets continuously aggregate together and merge into larger droplets, improving the aggregation effect of large droplets and thus improving the subsequent droplet separation efficiency.
[0022] Each connecting pipe 3 is equipped with a regulating solenoid valve 21. Since the design operating conditions of the equipment are relatively fixed, when the enterprise load decreases and the amount of gas decreases, the gas flow rate in the throat of the venturi tube 4 will decrease, thereby drastically reducing the gas processing efficiency. After setting the regulating solenoid valve 21, by closing part of the regulating solenoid valve 21, part of the venturi tube 4 can be closed to adapt to the low load operating conditions of the device, so that the normally operating venturi tube 4 can still maintain a high-efficiency throat speed and achieve wide load regulation.
[0023] Each gas collection chamber 9 below the Venturi tube 4 is equipped with an impact plate 22. The impact plate 22 is fixed in the gas collection chamber 9 by a connecting rod. The gas flows from top to bottom in the central gas pipeline, passing through the connecting pipe 3 and the Venturi tube 4 in sequence before flowing to the impact plate 22. During the impact process, impurities such as droplets and solid particles are separated from the gas, achieving the initial purification and separation of impurities such as droplets in the gas.
[0024] The upper surface of the impact plate 22 is provided with several spikes 23. After the coal gas is desulfurized by the desulfurization liquid, there may be some tiny bubbles in the coal gas. After passing through the Venturi tube 4, these tiny bubbles will rush towards the impact plate 22. The spikes 23 on the impact plate 22 can puncture these tiny bubbles in the coal gas, and further realize the separation of liquid droplets in the coal gas.
Claims
1. A gas purification and separation device at the bottom of a desulfurization tower, comprising a desulfurization tower (1) and a central gas pipeline (2) disposed within the desulfurization tower (1), characterized in that: The bottom of the central gas pipeline (2) is equipped with a blocking plate, on which multiple connecting pipes (3) are evenly distributed. The lower end of each connecting pipe (3) is connected to a Venturi tube (4). The lower part of the central gas pipeline (2) is connected to a vertical cylinder (6) through a top plate (5). The lower end of the vertical cylinder (6) is connected to a lower liquid cone (7). The lower end of the lower liquid cone (7) is connected to the bottom of the desulfurization tower (1). The lower part of the vertical cylinder (6) is equipped with a baffle plate (8). A gas collecting chamber (9) is provided on the baffle plate (8). The bottom of the gas collecting chamber (9) is connected to the internal space of the vertical cylinder (6) through a leakage hole. The lower end of the Venturi tube (4) The top of the gas collection chamber (9) is connected to the gas collection chamber (9). Multiple gas outlet pipes are tangentially arranged on the side wall of the gas collection chamber (9). A drain pipe (10) connected to the lower liquid cone (7) is provided on the partition plate (8). An exhaust pipe (11) is provided on the upper part of the vertical cylinder (6). An annular scraper (12) is provided inside the vertical cylinder (6). The outer side of the scraper (12) contacts the inner side wall of the vertical cylinder (6). A threaded hole is machined on the scraper (12). A screw (13) is connected inside the threaded hole. The lower end of the screw (13) is rotatably connected to the partition plate (8), and the upper end is drivenly connected to the motor (14) installed on the top plate (5).
2. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: Annular nozzles (15) are provided above and below the scraper (12), and an inlet pipe is provided on the top plate (5). The inlet pipe is connected to the annular nozzles (15) through a hose (16).
3. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: A liquid level sensor (24) is installed at the lower part of the vertical cylinder (6), and a drain solenoid valve (17) is installed on the drain pipe (10).
4. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: The scraper (12) has a through hole, and a guide rod (18) is installed in the through hole. The lower end of the guide rod (18) is fixedly connected to the partition plate (8), and the upper end of the guide rod (18) is fixedly connected to the top plate (5).
5. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: The Venturi tube (4) includes a constriction section, a throat and a diffusion section connected from top to bottom. An infusion ring tube (19) is provided on the outside of the Venturi tube (4). The infusion ring tube (19) is connected to the bottom of the constriction section of each Venturi tube (4) through a branch tube. An infusion tube (20) is connected to the infusion ring tube (19).
6. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: Each connecting pipe (3) is equipped with a regulating solenoid valve (21).
7. The desulfurization tower bottom gas purification and separation device according to claim 1, characterized in that: An impact plate (22) is installed in the gas collection chamber (9) below each Venturi tube (4), and the impact plate (22) is fixed in the gas collection chamber (9) by a connecting rod.
8. The desulfurization tower bottom gas purification and separation device according to claim 7, characterized in that: The upper surface of the impact plate (22) is provided with a number of spikes (23).