Coal gas cooling device with backwashing function
Patent Information
- Application Number
- CN202522359511.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-06
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-06
AI Technical Summary
1）设置的第二回水管与煤气冷却装置固定连接，同时第二回水管与第一回水管固定连接，第一回水管与循环水总管固定连接，形成循环闭路，通过热交换降低煤气温度，确保工艺安全、设备稳定运行，并回收热能，煤气在生成或输送过程中温度较高，如焦炉煤气可达600~800℃，直接接触设备或管道可能引发变形、密封失效甚至爆炸。循环水通过管道间接冷却煤气，将温度降至安全范围至40~60℃；高温煤气中的焦油、萘等杂质易冷凝结块，冷却后可减少管道堵塞风险；冷却后的煤气体积收缩，减少后续压缩或输送的能耗；冷却促使煤气中的水蒸气、焦油、硫化物等冷凝析出，便于后续脱硫、除尘等净化处理，减少污染物排放。
Smart Images
Figure CN224787813U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coal gas cooling equipment in the coking chemical product recovery area, specifically a coal gas cooling device with backwashing function. Background Technology
[0002] Coal gas cooling devices such as primary coolers, precooling towers, and final coolers are prone to blockage due to scaling on the tube bundles and debris such as packing material in cooling towers. Scaling on the tube bundles, such as scale and sludge, accumulates on the heat exchange surface, forming an insulating layer that significantly reduces the heat transfer coefficient, resulting in poor cooling performance and preventing the cooling medium from effectively dissipating heat. Blockage of the cooling tower packing material by sludge, algae, or other debris disrupts the uniform contact surface between water and air, reducing the evaporative heat dissipation area and decreasing the cooling water's temperature reduction capacity. Therefore, regular professional cleaning is necessary. The most severe blockage in the tube bundles of the coal gas cooling devices is concentrated at the end caps at the tube inlet, causing narrowing or even complete blockage of the cooling water channels. This reduces the cooling water circulation, affecting the coal gas cooling effect and making it difficult to remove impurities such as tar mist and naphthalene from the coal gas. This impacts the stable operation of desulfurization and ammonia absorption processes and leads to a decline in coal gas quality, affecting downstream users.
[0003] Therefore, a gas cooling device is needed to effectively prevent the tube bundles inside the gas cooling device from becoming clogged. Regular cleaning is required, which involves a large investment and extends the production cycle. Utility Model Content
[0004] The purpose of this utility model is to provide a gas cooling device with a backwashing function that has a reasonable structural design, is easy to process, has low processing and manufacturing costs, is convenient to operate, can backwash the tube bundle of the gas cooling device, improve the tube bundle blockage problem of the gas cooling device, extend the service life of the tube bundle of the gas cooling device, and thus extend the service life of the gas cooling device.
[0005] This utility model discloses a gas cooling device with backwashing function, including a gas cooling device, a second return water pipe fixedly connected to the side wall of the gas cooling device, the second return water pipe being connected to a first return water pipe; a return water pipe control valve fixedly installed on the second return water pipe; a backwashing water supply pipe fixedly connected to the second return water pipe, and a first backwashing water supply pipe control valve fixedly installed on the second return water pipe.
[0006] The second return water pipe is fixedly connected to the gas cooling device, and simultaneously fixedly connected to the first return water pipe, which in turn is fixedly connected to the main circulating water pipe, forming a closed-loop circulation system. This system reduces the gas temperature through heat exchange, ensuring process safety, stable equipment operation, and heat energy recovery. Gas temperatures are high during generation and transportation; for example, coke oven gas can reach 600-800℃. Direct contact with equipment or pipelines could cause deformation, seal failure, or even explosion. The circulating water indirectly cools the gas through pipelines, reducing the temperature to a safe range of 40-60℃. Impurities such as tar and naphthalene in high-temperature gas easily condense and agglomerate; cooling reduces the risk of pipeline blockage. The cooled gas shrinks in volume, reducing energy consumption for subsequent compression or transportation. Cooling also causes water vapor, tar, sulfides, and other pollutants in the gas to condense and precipitate, facilitating subsequent desulfurization, dust removal, and other purification treatments, thus reducing pollutant emissions.
[0007] A second backwash water supply pipe control valve is fixedly installed on the second return water pipe; the first backwash water supply pipe control valve and the second backwash water supply pipe control valve are installed near both ends of the second return water pipe.
[0008] The bottom end of the backwash water supply pipe is fixedly connected to the second water supply main pipe, the end of the second water supply main pipe is fixedly connected to the first water supply main pipe, the second water supply main pipe is fixedly installed with a water supply main pipe control valve, and the other end of the second water supply main pipe is fixedly connected to the side wall of the gas cooling device.
[0009] The backwash water supply pipe is fixedly connected to the second and first water supply mains. The first water supply main is connected to the water supply device to provide a water source, forming a backwash loop. When it is necessary to flush out blockages in the tube bundle of the gas cooling device, the return water pipe control valve and the water supply main control valve can be closed, while the first and second backwash water supply pipe control valves can be opened. Water flows through the first and second water supply mains, the backwash water supply pipe, and the second return water pipe, ultimately entering the gas system. Inside the cooling unit tube bundle, the circulating cooling water from the gas cooling unit flows back from the tube bundle outlet to backwash away scale and deposits, maintaining heat exchange efficiency and ensuring safe operation of the equipment. The reverse-flowing cooling water can flush away impurities such as tar, dust, and sulfides adhering to the tube wall, preventing long-term scale buildup from reducing heat transfer efficiency. Particulate matter in the gas tends to accumulate at bends or narrow sections of the tube bundle; backwashing can clear local blockages and ensure smooth flow of the medium. This reduces damage to the tubes from corrosion and scaling, lowering maintenance frequency and replacement costs.
[0010] A sewage discharge pipe is fixedly installed on the second water supply main, and a sewage discharge control valve is fixedly installed on the sewage discharge pipe.
[0011] The wastewater discharge pipe is connected to the second water supply main pipe. After the gas cooling device tube bundle is backwashed, the control valve of the water supply main pipe can be opened. The flushed wastewater is discharged into the ditch or other recycling device through the second water supply main pipe and the wastewater discharge pipe for wastewater recycling and treatment, thereby reducing pollution.
[0012] The beneficial effects of this utility model are: 1) The second return water pipe is fixedly connected to the gas cooling device, and simultaneously fixedly connected to the first return water pipe, which in turn is fixedly connected to the main circulating water pipe, forming a closed-loop circulation system. This system reduces the gas temperature through heat exchange, ensuring process safety, stable equipment operation, and heat recovery. Gas temperatures are high during generation and transportation; for example, coke oven gas can reach 600-800℃. Direct contact with equipment or pipelines may cause deformation, seal failure, or even explosion. The circulating water indirectly cools the gas through pipelines, reducing the temperature to a safe range of 40-60℃. Impurities such as tar and naphthalene in high-temperature gas easily condense and agglomerate; cooling reduces the risk of pipeline blockage. The cooled gas shrinks in volume, reducing energy consumption for subsequent compression or transportation. Cooling also promotes the condensation and precipitation of water vapor, tar, sulfides, etc., in the gas, facilitating subsequent desulfurization, dust removal, and other purification treatments, thus reducing pollutant emissions.
[0013] 2) The backwash water supply pipe is fixedly connected to the second and first water supply mains. The first water supply main is connected to the water supply device to provide a water source, forming a backwash loop. When it is necessary to flush out blockages in the tube bundle of the gas cooling device, the return water pipe control valve and the water supply main control valve can be closed, while the first and second backwash water supply pipe control valves can be opened. Water flows through the first and second water supply mains, the backwash water supply pipe, and the second return water pipe, ultimately entering the coal cooling system. Inside the gas-cooled tube bundle, the circulating cooling water from the gas cooling device flows back from the tube bundle outlet to backwash away scale and deposits, maintaining heat exchange efficiency and ensuring safe operation of the equipment. The reverse-flowing cooling water can flush away impurities such as tar, dust, and sulfides adhering to the tube wall, preventing long-term scale buildup from reducing heat transfer efficiency. Particulate matter in the gas tends to accumulate at bends or narrow sections of the tube bundle; backwashing can clear local blockages and ensure smooth flow of the medium. This reduces damage to the tubes from corrosion and scaling, lowering maintenance frequency and replacement costs.
[0014] 3) The sewage discharge pipe is connected to the second water supply main pipe. After the gas cooling device tube bundle is backwashed, the control valve of the water supply main pipe and the sewage discharge control valve can be opened. The flushed sewage is discharged into the ditch or other recycling device through the second water supply main pipe and the sewage discharge pipe to recycle the sewage and reduce pollution.
[0015] 4) The device has a reasonable structural design, is easy to process, has low processing and manufacturing costs, and is easy to operate. It can backwash the tube bundle of the gas cooling device, improve the tube bundle blockage problem of the gas cooling device, extend the service life of the tube bundle of the gas cooling device, and thus extend the service life of the gas cooling device. It is highly practical and has been put into use with good results. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model; In the diagram: 1. First return water pipe; 2. First main water supply pipe; 3. Return water pipe control valve; 4. Second return water pipe; 5. First backwash water supply pipe control valve; 6. Backwash water supply pipe; 7. Second main water supply pipe; 8. Main water supply pipe control valve; 9. Sewage discharge pipe; 10. Sewage discharge control valve; 11. Gas cooling device. Detailed Implementation
[0017] Example 1. The present invention will be further described below with reference to the accompanying drawings.
[0018] This utility model includes a first return water pipe 1, a first main water supply pipe 2, a return water pipe control valve 3, a second return water pipe 4, a first backwash water supply pipe control valve 5, a backwash water supply pipe 6, a second backwash water supply pipe control valve 7, a second main water supply pipe 8, a main water supply pipe control valve 9, and a gas cooling device 12. Specifically, the gas cooling device 12 has a second return water pipe 4 fixedly connected to its side wall, and the second return water pipe 4 is connected to the first return water pipe 1. A return water pipe control valve 3 is fixedly installed on the second return water pipe 4. A backwash water supply pipe 6 is fixedly connected to the second return water pipe 4, and a first backwash water supply pipe control valve 5 is fixedly installed on the second return water pipe 4.
[0019] A second backwash water supply pipe control valve 7 is fixedly installed on the second return water pipe 4; the first backwash water supply pipe control valve 5 and the second backwash water supply pipe control valve 7 are installed near both ends of the second return water pipe 4.
[0020] The bottom end of the backwash water supply pipe 6 is fixedly connected to the second water supply main pipe 8, the end of the second water supply main pipe 8 is fixedly connected to the first water supply main pipe 2, the second water supply main pipe 8 is fixedly installed with the water supply main pipe control valve 9, and the other end of the second water supply main pipe 8 is fixedly connected to the side wall of the gas cooling device 12.
[0021] The return water pipe control valve 3, the first backwash water supply pipe control valve 5, the second backwash water supply pipe control valve 7, and the main water supply pipe control valve 9 are all of model Z41H-16C.
[0022] Operating method: The second return water pipe 4 is fixedly connected to the gas cooling device 12, and simultaneously fixedly connected to the first return water pipe 1. The first return water pipe 1 is fixedly connected to the circulating water main pipe, forming a closed-loop circulation. The gas temperature is reduced through heat exchange. The backwash water supply pipe 6 is fixedly connected to the second water supply main pipe 8 and the first water supply main pipe 2. The first water supply main pipe 2 is connected to the water supply device to provide a water source, which can form a backwashing loop. When it is necessary to flush the blockage in the tube bundle of the gas cooling device 12, the return water pipe control valve 3 and the water supply main pipe control valve 9 can be closed, and the first backwash water supply pipe control valve 5 and the second backwash water supply pipe control valve 7 can be opened. The water flows in through the first water supply main pipe 2, the second water supply main pipe 8, the backwash water supply pipe 6, and the second return water pipe 4, and finally enters the tube bundle of the gas cooling device 12. The cooling circulating water of the gas cooling device 12 flows back from the tube bundle outlet to backwash the scale and deposits in the tube bundle.
[0023] Example 2. This utility model includes a first return water pipe 1, a first main water supply pipe 2, a return water pipe control valve 3, a second return water pipe 4, a first backwash water supply pipe control valve 5, a backwash water supply pipe 6, a second backwash water supply pipe control valve 7, a second main water supply pipe 8, a main water supply pipe control valve 9, a sewage discharge pipe 10, a sewage discharge control valve 11, and a gas cooling device 12. Specifically, the gas cooling device 12 has a second return water pipe 4 fixedly connected to its side wall, and the second return water pipe 4 is connected to the first return water pipe 1. A return water pipe control valve 3 is fixedly installed on the second return water pipe 4. A backwash water supply pipe 6 is fixedly connected to the second return water pipe 4, and a first backwash water supply pipe control valve 5 is fixedly installed on the second return water pipe 4.
[0024] A second backwash water supply pipe control valve 7 is fixedly installed on the second return water pipe 4; the first backwash water supply pipe control valve 5 and the second backwash water supply pipe control valve 7 are installed near both ends of the second return water pipe 4.
[0025] The bottom end of the backwash water supply pipe 6 is fixedly connected to the second water supply main pipe 8, the end of the second water supply main pipe 8 is fixedly connected to the first water supply main pipe 2, the second water supply main pipe 8 is fixedly installed with the water supply main pipe control valve 9, and the other end of the second water supply main pipe 8 is fixedly connected to the side wall of the gas cooling device 12.
[0026] A sewage discharge pipe 10 is fixedly installed on the second water supply main pipe 8, and a sewage discharge control valve 11 is fixedly installed on the sewage discharge pipe 10.
[0027] The return water pipe control valve 3, the first backwash water supply pipe control valve 5, the second backwash water supply pipe control valve 7, the main water supply pipe control valve 9, and the sewage discharge control valve 11 are all of model Z41H-16C.
[0028] Operating Instructions: The second return water pipe 4 is fixedly connected to the gas cooling device 12, and simultaneously fixedly connected to the first return water pipe 1. The first return water pipe 1 is fixedly connected to the circulating water main pipe, forming a closed-loop circulation system to reduce the gas temperature through heat exchange. The backwash water supply pipe 6 is fixedly connected to the second water supply main pipe 8 and the first water supply main pipe 2. The first water supply main pipe 2 is connected to the water supply device to provide a water source, forming a backwashing loop. When it is necessary to flush out blockages in the tube bundle of the gas cooling device 12, the return water pipe control valve 3 and the water supply main pipe control valve 9 can be closed, while the first backwash water supply pipe control valve 5 and the second backwash water supply pipe control valve 6 can be opened. Water is controlled by valve 7. Water flows through the first main water supply pipe 2, the second main water supply pipe 8, the backwash water supply pipe 6, and the second return water pipe 4, finally entering the tube bundle of the gas cooling device 12. The cooling circulating water of the gas cooling device 12 flows back from the tube bundle outlet to backwash the scale and deposits inside the tube bundle. The sewage discharge pipe 10 is connected to the second main water supply pipe 8. After backwashing the tube bundle of the gas cooling device 12, the main water supply pipe control valve 9 and the sewage discharge control valve 11 can be opened. The flushed sewage is discharged through the second main water supply pipe 8 and the sewage discharge pipe 10 to the ditch or other recycling device for sewage recycling and treatment, reducing pollution.
Claims
1. A gas cooling device with backflushing function, comprising a gas cooling device (12), characterized in that: A second return water pipe (4) is fixedly connected to the side wall of the gas cooling device (12), and the second return water pipe (4) is connected to the first return water pipe (1); a return water pipe control valve (3) is fixedly installed on the second return water pipe (4); a backwash water supply pipe (6) is fixedly connected to the second return water pipe (4), and a first backwash water supply pipe control valve (5) is fixedly installed on the second return water pipe (4).
2. A gas cooling device with backflushing function as described in claim 1, characterized in that: The second return water pipe (4) is fixedly installed with a second backwash water supply pipe control valve (7); the first backwash water supply pipe control valve (5) and the second backwash water supply pipe control valve (7) are installed near both ends of the second return water pipe (4).
3. A gas cooling device with backflushing function as described in claim 2, characterized in that: The bottom end of the backwash water supply pipe (6) is fixedly connected to the second water supply main pipe (8), the end of the second water supply main pipe (8) is fixedly connected to the first water supply main pipe (2), the second water supply main pipe (8) is fixedly installed with the water supply main pipe control valve (9), and the other end of the second water supply main pipe (8) is fixedly connected to the side wall of the gas cooling device (12).
4. A gas cooling device with backflushing function as described in claim 3, characterized in that: A sewage discharge pipe (10) is fixedly installed on the second water supply main pipe (8), and a sewage discharge control valve (11) is fixedly installed on the sewage discharge pipe (10).