Leak-proof device for a coal gas cooler

Abstract

The utility model discloses a kind of anti-leakage devices of coal gas cooler, including cooler main body, U-shaped pipe and hot water pool, one end of the U-shaped pipe is connected first horizontal pipe, the other end is connected second horizontal pipe, the first horizontal pipe passes through the wall body of the cooler main body, the end portion of the first horizontal pipe in the cooler main body has overflow extension pipe extending downward, the hot water pool is below the U-shaped pipe, the second horizontal pipe is communicated with the hot water pool by connecting pipe. The utility model passes through setting the overflow extension pipe extending downward, the liquid level in the cooler main body forms first barrier to the coal gas in the cooler main body, water in the U-shaped pipe forms second barrier to coal gas, constitutes double water seal, double water seal structure is more reliable, and leakage prevention grade is higher, effect is also better, can effectively avoid coal gas leakage to the hot water pool and cause various problems.

Description

Technical Field

[0001] This utility model relates to the field of gas production equipment, and in particular to a leak prevention device for a gas cooler. Background Technology

[0002] In dry dust removal systems for steelmaking in the iron and steel metallurgical industry, the gas cooler, as the core equipment for gas purification and cooling, directly determines the safety, environmental protection, and energy efficiency of the entire dry dust removal process through its operational stability. A typical existing structure, as described in Chinese patent CN201721879071.9, involves a cooler body connected to a high-temperature gas inlet. Multiple layers of spray devices are arranged along the height of the interior, using circulating water atomization spray to rapidly cool and wash the high-temperature gas. As the spray water accumulates, a certain liquid level forms at the bottom of the cooler body. To prevent excessively high liquid levels from causing a surge in gas resistance or even backflow into the fan, an overflow pipe is horizontally connected to the side wall of the main body at the designed maximum liquid level. The outlet of the overflow pipe is connected to an open-air hot water tank to achieve continuous overflow drainage.

[0003] To prevent the gas inside the cooler from being directly discharged into the atmosphere through the overflow pipe, a U-shaped water seal is usually installed on the overflow pipe. Theoretically, an effective liquid seal can be formed when the height of the water column in the U-shaped pipe is ≥1.5 times the gas pressure. However, steelmaking gas contains 5~15g / Nm³ of dust, 60~70% CO, 2~3% H2, 15~20% CO2, and 0.2~0.4% O2, and carries a large amount of mechanical water, tar, acidic gases, and chloride ions. Under harsh conditions of strong scouring, high corrosion, and high dust content, the U-shaped water seal exposes the following main defects: 1. Dynamic imbalance of water seal height: The high solid content in the spray water makes it easy for sludge to accumulate at the bottom of the U-shaped water seal, and the effective water seal height is gradually eroded; especially in the case of high-pressure gas in the cooler body, when the water seal height is lower than the corresponding value of gas pressure, the high-pressure gas will instantly break through the water column, forming a "gasping" phenomenon, causing periodic and severe leakage.

[0004] 2. Gas-liquid two-phase entrainment leakage: Even if the water seal height is sufficient, the high-speed overflow water generates violent turbulence in the descending section of the U-shaped water seal, and the gas is entrained by the water flow in the form of bubbles, forming "aerosol" emissions.

[0005] The combined effect of these defects leads to coal gas concentrations in the hot water pool area below the gas cooler often reaching as high as 1500 ppm. High concentrations of coal gas not only pose risks of poisoning and explosion, but its acidic components also cause cracking of the hot water pool concrete, corrosion of reinforcing steel, increased annual replacement rates for cables and instrument sensors, and increased unplanned downtime. Simultaneously, fugitive emissions cause CO concentrations at the plant boundary to exceed standards, resulting in frequent environmental complaints and administrative penalties. Even more serious is the fact that in high coal gas concentration warning areas, inspections and maintenance work require wearing breathing apparatus and dual supervision, extending the time required for each inspection, reducing manual efficiency, and still carrying the risk of human error, creating a vicious cycle of "leakage - accumulating hidden dangers - escalating risks." Utility Model Content

[0006] The purpose of this utility model is to provide a leak-proof device for a gas cooler.

[0007] The technical solution to achieve the purpose of this utility model is: a leak-proof device for a gas cooler, comprising a cooler body, a U-shaped pipe and a hot water tank. The U-shaped pipe and the hot water tank are located outside the cooler body. One end of the U-shaped pipe is connected to a first horizontal pipe and the other end is connected to a second horizontal pipe. The first horizontal pipe passes through the wall of the cooler body. The end of the first horizontal pipe located inside the cooler body extends downward to an overflow extension pipe. The lower end of the overflow extension pipe is open. The hot water tank is located below the U-shaped pipe. The second horizontal pipe is connected to the hot water tank through a connecting pipe.

[0008] Furthermore, the overflow extension pipe is vertically arranged. At the same vertical height, the vertically arranged overflow extension pipe is shorter and uses less material.

[0009] Furthermore, the vertical height of the overflow extension pipe is 1.2~1.5m. The length of the overflow extension pipe is determined according to the gas pressure inside the cylinder. The gas pressure inside the cooler body is usually 2~8 kPa. When the vertical height of the overflow extension pipe is 1.2~1.5m, it can more effectively ensure that the gas will not break through the liquid surface.

[0010] Furthermore, a first vent pipe is installed on the first horizontal pipe, with its lower end connected to the first horizontal pipe and its upper end open. The first vent pipe is used to release the gas that escapes into the first horizontal pipe through the overflow extension pipe. This ensures that even if gas from the cooler body escapes into the first horizontal pipe through the overflow extension pipe, the gas in the first horizontal pipe can be dispersed through the first vent pipe, preventing gas from escaping into the hot water tank and increasing the gas concentration near the hot water tank. The installation of the first vent pipe provides another safeguard against gas accumulation near the hot water tank. Combined with the overflow extension pipe and the U-shaped pipe, this multi-measure redundant setup significantly reduces the probability of gas escaping to the hot water tank, improving the safety of the environment at the hot water tank.

[0011] Furthermore, the first vent pipe is vertically arranged. This vertically arranged vent pipe releases the gas upwards. When releasing the gas upwards, the gas flows directly upwards after exiting the first vent pipe, preventing it from spreading outwards and affecting the surrounding environment.

[0012] Furthermore, a second vent pipe is installed on the second horizontal pipe. The lower end of the second vent pipe is connected to the second horizontal pipe, and the upper end is open. The second vent pipe is used to vent the gas that escapes into the second horizontal pipe through the overflow extension pipe and the U-shaped pipe. This ensures that even if the gas in the cooler body escapes into the second horizontal pipe through the overflow extension pipe and the U-shaped pipe, the gas that escapes into the second horizontal pipe can be dispersed through the second vent pipe, preventing the gas from escaping into the hot water pool and increasing the gas concentration near the hot water pool. The installation of the second vent pipe provides another safeguard against the accumulation of gas near the hot water pool. Combined with the overflow extension pipe and the U-shaped pipe, the multiple redundant measures can greatly reduce the probability of gas escaping to the hot water pool and improve the safety of the environment at the hot water pool.

[0013] Furthermore, the second vent pipe is vertically arranged. This vertically arranged second vent pipe vents the gas upwards. When venting the gas upwards, the gas flows directly upwards after exiting the second vent pipe, preventing it from spreading outwards and affecting the surrounding environment.

[0014] This utility model relates to a leak-proof device for a gas cooler. An overflow extension pipe extending downwards is installed at the end of the first horizontal pipe located within the cooler body. This allows the lower end of the overflow extension pipe, composed of the overflow extension pipe and the U-shaped pipe, to extend below the liquid surface within the cooler body. After the overflow port at the lower end of the overflow extension pipe extends below the liquid surface, water within the cooler body must enter the overflow extension pipe and the U-shaped pipe from below the liquid surface. Under this overflow path, the liquid surface within the cooler body forms a first barrier against the gas, and the water in the U-shaped pipe forms a second barrier against the gas, creating a double water seal. Compared to the single water seal structure of the U-shaped pipe, the double water seal structure of the overflow extension pipe and the U-shaped pipe extending below the liquid surface is more reliable, has a higher leak-proof rating, and is more effective, effectively preventing gas leakage to the hot water tank and the resulting problems. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the anti-leakage device of the gas cooler of this utility model; in the figure, the spatial arrows represent the flow path of the gas, the solid arrows represent the overflow path of the water, and the dashed lines represent the liquid surface. Detailed Implementation

[0016] The preferred embodiment of the anti-leakage device for the gas cooler of this utility model will be described in detail below with reference to the accompanying drawings: like Figure 1 As shown, a leak-proof device for a gas cooler includes a cooler body 1, a U-shaped pipe 2, and a hot water tank 10. Both the U-shaped pipe 2 and the hot water tank 10 are located outside the cooler body 1. One end of the U-shaped pipe 2 is connected to a first horizontal pipe 31, and the other end is connected to a second horizontal pipe 32. The first horizontal pipe 31 passes through the wall of the cooler body 1. An overflow extension pipe 4 extends downward from the end of the first horizontal pipe 31 inside the cooler body 1. The lower end of the overflow extension pipe 4 is open. The hot water tank 10 is located below the U-shaped pipe 2. The second horizontal pipe 32 is connected to the hot water tank 10 through a connecting pipe 5.

[0017] This utility model relates to a leak-proof device for a gas cooler. The cooler body 1 is equipped with a spray device. During gas cooling, gas is introduced into the cooler body 1, and the spray device sprays water to cool and wash the gas entering the cooler body 1. The structure and cooling principle of the cooler body 1 are existing technologies, and will not be elaborated further in this utility model.

[0018] This utility model relates to a leak-proof device for a gas cooler. During the gas cooling process, as the spray device continuously sprays water, the water level at the bottom of the cooler body 1 gradually rises, submerging the lower end of the overflow extension pipe 4. After reaching the height of the first horizontal pipe 31, the overflow extension pipe 4 is below the liquid surface. The water in the cooler body 1 flows out sequentially along the overflow extension pipe 4, the first horizontal pipe 31, the U-shaped pipe 2, the second horizontal pipe 32, and the connecting pipe 5, and flows into the hot water tank 10.

[0019] This utility model relates to a leak-proof device for a gas cooler. An overflow extension pipe 4 extends downwards from the end of the first horizontal pipe 31 located within the cooler body 1. This allows the lower end of the overflow extension pipe 4, composed of the overflow extension pipe 4 and the U-shaped pipe 2, to extend below the liquid surface within the cooler body 1. After the overflow port at the lower end of the overflow extension pipe 4 extends below the liquid surface, water within the cooler body 1 must enter the overflow extension pipe 4 and the U-shaped pipe 2 from below the liquid surface. Under this overflow path, the liquid surface within the cooler body 1 forms a first barrier against the gas within the cooler body 1, and the water in the U-shaped pipe 2 forms a second barrier against the gas, thus creating a double water seal. Compared to the single water seal structure of the U-shaped pipe 2, the double water seal structure of the overflow extension pipe 4 and the U-shaped pipe 2 extending below the liquid surface is more reliable, has a higher leak-proof rating, and is more effective, effectively preventing gas leakage to the hot water tank 10 and avoiding various problems.

[0020] After our company used the leak-proof device of this utility model for the gas cooler, the gas concentration around the hot water pool 10 was found to be less than 24 ppm, meeting the safe operating threshold. Furthermore, during the gas cooling and recovery process, due to the better sealing of the leak-proof device, the fluctuation of the liquid level inside the cooler body 1 was also smaller and more stable.

[0021] In this invention, the leakage prevention device for a gas cooler preferably has the overflow extension pipe 4 vertically installed. At the same vertical height, the vertically installed overflow extension pipe 4 is shorter and uses less material.

[0022] In the leak-proof device of this utility model gas cooler, preferably, the vertical height of the overflow extension pipe 4 is 1.2~1.5m. The length of the overflow extension pipe 4 is determined according to the gas pressure inside the cylinder. The gas pressure inside the cooler body 1 is usually 2~8 kPa. When the vertical height of the overflow extension pipe 4 is 1.2~1.5m, it can more effectively ensure that the gas will not break through the liquid surface.

[0023] In a preferred embodiment of the leak-proof device for a gas cooler of this utility model, a first vent pipe 61 is installed on the first horizontal pipe 31. The lower end of the first vent pipe 61 is connected to the first horizontal pipe 31, and the upper end is open. The first vent pipe 61 is used to vent the gas that escapes into the first horizontal pipe 31 through the overflow extension pipe 4. This ensures that even if the gas in the cooler body 1 escapes into the first horizontal pipe 31 through the overflow extension pipe 4, the gas that escapes into the first horizontal pipe 31 can be dispersed through the first vent pipe 61, preventing the gas from escaping into the hot water tank 10 and increasing the gas concentration near the hot water tank 10. The installation of the first vent pipe 61 provides another safeguard against the accumulation of gas near the hot water tank 10. Combined with the overflow extension pipe 4 and the U-shaped pipe 2, the multiple redundant measures can greatly reduce the probability of gas escaping into the hot water tank 10 and improve the safety of the environment at the hot water tank 10. In addition, due to its low density, the gas in the water overflows. When the gas overflows from the water in the first horizontal pipe 31 and is installed on the first vent pipe 61, the gas overflowing from the water in the first horizontal pipe 31 is more easily dispersed by the first vent pipe 61, resulting in a better dispersion effect.

[0024] In this utility model, the leak-proof device for a gas cooler preferably has the first vent pipe 61 vertically arranged. The vertically arranged first vent pipe 61 vents the gas upwards. When venting the gas upwards, the gas flows directly upwards after exiting the first vent pipe 61, preventing it from spreading to the surrounding environment and affecting it.

[0025] In a preferred embodiment of the leak-proof device for a gas cooler of this utility model, a second vent pipe 62 is installed on the second horizontal pipe 32. The lower end of the second vent pipe 62 is connected to the second horizontal pipe 32, and the upper end is open. The second vent pipe 62 is used to vent the gas that escapes into the second horizontal pipe 32 through the overflow extension pipe 4 and the U-shaped pipe 2. This ensures that even if the gas in the cooler body 1 escapes into the second horizontal pipe 32 through the overflow extension pipe 4 and the U-shaped pipe 2, the gas that escapes into the second horizontal pipe 32 can be dispersed by the second vent pipe 62, preventing the gas from escaping into the hot water tank 10 and increasing the gas concentration near the hot water tank 10. The installation of the second vent pipe 62 provides another safeguard against the accumulation of gas near the hot water tank 10. Combined with the overflow extension pipe 4 and the U-shaped pipe 2, the multiple redundant measures can greatly reduce the probability of gas escaping into the hot water tank 10 and improve the safety of the environment at the hot water tank 10. In addition, due to its low density, the gas in the water overflows. When the second horizontal pipe 32 is installed on the second vent pipe 62, the gas overflowing from the water in the second horizontal pipe 32 is more easily dispersed by the second vent pipe 62, resulting in a better venting effect.

[0026] In this utility model, the leak-proof device for a gas cooler preferably has the second vent pipe 62 vertically arranged. The vertically arranged second vent pipe 62 vents the gas upwards. When venting the gas upwards, the gas flows directly upwards after exiting the second vent pipe 62, preventing it from spreading to the surrounding environment and affecting it.

[0027] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A leak-proof device for a gas cooler, comprising a cooler body, a U-shaped pipe, and a hot water tank, wherein the U-shaped pipe and the hot water tank are located outside the cooler body, one end of the U-shaped pipe is connected to a first horizontal pipe, and the other end is connected to a second horizontal pipe, characterized in that: The first horizontal pipe passes through the wall of the cooler body. The end of the first horizontal pipe located inside the cooler body extends downward to an overflow extension pipe. The lower end of the overflow extension pipe is open. The hot water tank is located below the U-shaped pipe. The second horizontal pipe is connected to the hot water tank through a connecting pipe.

2. The leak-proof device for the gas cooler according to claim 1, characterized in that: The overflow extension pipe is set vertically.

3. The leak-proof device for the gas cooler according to claim 1, characterized in that: The vertical height of the overflow extension pipe is 1.2~1.5m.

4. The anti-leakage device for the gas cooler according to claim 1, characterized in that: A first vent pipe is installed on the first horizontal pipe, with the lower end of the first vent pipe connected to the first horizontal pipe and the upper end open.

5. The anti-leakage device for the gas cooler according to claim 4, characterized in that: The first vent pipe is set vertically.

6. The anti-leakage device for the gas cooler according to claim 1, characterized in that: A second vent pipe is installed on the second horizontal pipe, with the lower end of the second vent pipe connected to the second horizontal pipe and the upper end open.

7. The leak-proof device for a gas cooler according to claim 6, characterized in that: The second vent pipe is set vertically.

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