Gas leakage prevention drainage and pollution discharge device for blast furnace top distributing device

Abstract

The utility model discloses a coal gas leakage prevention drainage and pollution discharge device for a blast furnace top distributing device, which comprises a drainage pipe, a water-gas separation box, a gas return pipe, a water-gas separation pipe, a pollution discharge box, an ascending section drainage pipe, a sewage drainage tank and a cooling water drainage tank positioned at the bottom of the distributing device, the cooling water drainage tank, the water drainage pipe, the water-gas separation box, the water-gas separation pipe, the pollution discharge box, the ascending section water drainage pipe and the sewage drainage tank are sequentially communicated, and the gas return pipe is connected with the water-gas separation box and the furnace top distributing device. According to the coal gas leakage prevention drainage and pollution discharge device for the blast furnace top distributing device, the drainage pipe below the cooling water drainage tank is not prone to being blocked, so that drainage is smoother, meanwhile, water-gas separation of the water-gas separation box and the water-gas separation pipe is combined with an upward floating channel of the gas return pipe, and in the drainage process, the water-gas leakage prevention effect is achieved. The water-gas separation is smoother, and the device is safer, more stable and more reliable in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of burden distributors for blast furnace tops in ironmaking, and particularly relates to a device for preventing gas leakage, draining water and discharging sewage of a burden distributor for a blast furnace top. Background Art

[0002] The burden distributor for the blast furnace top in ironmaking is a core device of the blast furnace, which is installed above the top steel ring of the furnace. The inside of the burden distributor is connected to the blast furnace and is mainly responsible for distributing materials into the blast furnace. When the blast furnace is working, a large amount of blast furnace gas is generated inside the furnace, and the temperature is also relatively high. To reduce the influence of high temperature, an open cooling water channel that is connected to the inside of the blast furnace is provided in the burden distributor. Compared with a closed cooling water pipe, the open cooling water channel has a better cooling effect. A drain trough is provided at the bottom of the burden distributor. After the open cooling water channel in the burden distributor converges into the drain trough, it is drained through an external connection to the drain system of the drain trough. Since it is an open cooling water channel that is connected to the inside of the blast furnace, to prevent blast furnace gas from leaking out along the cooling water channel of the cooling water pipe, the drain trough and the drain system, the drain system usually adopts a U-shaped pipeline structure. Whether it is a simple U-shaped pipe or as described in the patent document with the Chinese patent application number 201120017317.8, a sewage discharge box is provided below the U-shaped pipeline. Both use the principle of U-shaped water seal to seal the blast furnace gas. However, it is found in the actual use process that the existing drain system of the blast furnace burden distributor has the following disadvantages:

[0003] 1. The slope of the pipeline connected to the drain trough is small, or even horizontal. After lubricating oil and other oil stains in the burden distributor enter the drain system, it is difficult to operate in the pipeline with a small slope or even a horizontal setting, and it is easy to block the drain system, which may lead to water leakage from the burden distributor into the blast furnace, affecting the production of the blast furnace.

[0004] 2. The downward pipelines of its drain system are all directly connected to the drain trough. Limited by the interface diameter of the drain trough, the diameter of the downward pipelines of the drain system is usually small. However, the air pressure at the blast furnace top is high, and a large amount of gas enters the drain system with a high air pressure. When the cooling water with a large amount of gas and high air pressure is directly discharged from the drain system with a small diameter, it is easy to form a sealed air column in the drain system and leak out along the drain system. The water seal is often damaged, and a large amount of gas rushes out of the end of the drain pipe, posing a great safety hazard.

[0005] 3. The sewage discharge box below the U-shaped pipeline is usually flat. When high-pressure water is introduced into the sewage discharge box to clean the sewage discharge box, the sewage discharge box is easily deformed due to the high pressure, posing safety hazards such as cracking and air leakage. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a device for preventing gas leakage, draining water and discharging sewage of a burden distributor for a blast furnace top.

[0007] The technical solution for achieving the purpose of the present utility model is: A gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of a blast furnace, including a drain pipe, a water-gas separation tank, a return gas pipe, a water-gas separation pipe, a sewage discharge tank, an upward-section drain pipe, a sewage drainage trough, and a cooling water drainage trough located at the bottom of the burden distributor. The drain pipe, the return gas pipe, the water-gas separation pipe, and the upward-section drain pipe are all vertically arranged. The cooling water drainage trough, the water-gas separation tank, and the sewage discharge tank are arranged in sequence from top to bottom. The upper end of the drain pipe is communicated with the cooling water drainage trough, and the lower end is communicated with the top of the water-gas separation tank. The lower end of the return gas pipe is communicated with the top of the water-gas separation tank, and the upper end is communicated with the burden distributor at the top of the furnace. The upper end of the water-gas separation pipe is communicated with the bottom of the water-gas separation tank, and the lower end is communicated with the top of the sewage discharge tank. The sewage drainage trough is located above the sewage discharge tank and below the water-gas separation tank. The lower end of the upward-section drain pipe is communicated with the top of the sewage discharge tank, and the upper end is communicated with the top of the sewage drainage trough.

[0008] Further, the number of the drain pipes is several. The arrangement of several drain pipes facilitates the smooth drainage of the cooling water drainage trough.

[0009] Further, the bottom of the water-gas separation tank is of a conical structure. It is convenient for sewage discharge.

[0010] Further, the water-gas separation pipe and the upward-section drain pipe are vertical, and the water-gas separation pipe, the sewage discharge tank, and the upward-section drain pipe are in a U shape.

[0011] Further, the diameter of the water-gas separation pipe is limited such that the cooling water and gas entering the water-gas separation pipe can be automatically separated and no sealed gas column will be formed inside the water-gas separation pipe.

[0012] Further, the diameter of the water-gas separation pipe is not less than 20 cm. For the water-gas separation pipe with a diameter not less than 20 cm, its diameter is large enough. When draining water, the water-gas separation pipe will not be full of water, and the gas entering the water-gas separation pipe can penetrate upward, and no sealed gas column will be formed inside the water-gas separation pipe, so as to prevent leakage along with the cooling water.

[0013] Further, a sewage discharge port is provided at the bottom of the sewage discharge tank, and a sewage discharge valve is installed on the sewage discharge port. The sewage discharge port and the sewage discharge valve thereon are provided to facilitate the opening of the sewage discharge valve when overhauling or cleaning the sewage discharge tank, and the sewage in the sewage discharge tank can be discharged from the sewage discharge port.

[0014] Further, the first end of a connecting pipe is communicated with the water-gas separation pipe, the second end of the connecting pipe is communicated with the rising section drain pipe, a bypass valve is installed on the connecting pipe, a first maintenance valve is installed on the water-gas separation pipe, the first maintenance valve is located between the first end of the connecting pipe and the sewage tank, a second maintenance valve is installed on the rising section drain pipe, and the second maintenance valve is located between the second end of the connecting pipe and the sewage tank. During normal use, the bypass valve is closed, the first maintenance valve and the second maintenance valve are opened, the cooling water in the water-gas separation pipe passes through the sewage tank and then is discharged into the sewage drainage tank through the rising section drain pipe; when cleaning or maintaining the sewage tank, the bypass valve is opened, the first maintenance valve and the second maintenance valve are closed, the cooling water in the water-gas separation pipe passes through the connecting pipe and then is discharged into the sewage drainage tank through the rising section drain pipe, and the sewage tank is isolated. At this time, it is convenient to clean or maintain the sewage tank.

[0015] Further, a cleaning water pipe is connected to the top of the sewage tank, and a cleaning valve is installed on the cleaning water pipe. The arrangement of the cleaning water pipe and the cleaning valve thereon facilitates the cleaning of the sewage tank. During cleaning, the cleaning valve is opened, and high-pressure water is introduced into the sewage tank through the cleaning water pipe, and the sewage tank is cleaned by the high-pressure water.

[0016] Further, an exhaust pipe is connected to the top of the sewage tank, and an exhaust valve is installed on the exhaust pipe. The installation height of the exhaust valve is higher than the installation heights of the first maintenance valve and the second maintenance valve. The arrangement of the exhaust pipe and the exhaust valve thereon can balance the air pressure inside and outside the sewage tank, thereby facilitating the introduction of high-pressure water into the sewage tank through the cleaning water pipe to clean the sewage tank, especially the top of the sewage tank. When cleaning the top of the sewage tank, the sewage valve is closed, the exhaust valve is opened, high-pressure water is introduced into the sewage tank through the cleaning water pipe, and after the high-pressure water fills to the top of the sewage tank, the cleaning of the top of the sewage tank can be achieved.

[0017] Further, the bottom of the sewage tank is of a conical structure. This sewage tank has greater structural strength, is not easily deformed and air-leaked during the cleaning process, and is also convenient for sewage discharge.

[0018] The anti-gas-leakage drainage and sewage discharge device of the blast furnace top batcher of the present utility model has the following advantages:

[0019] 1. The drain pipe, the return air pipe, the water-gas separation pipe and the rising section drain pipe are all vertically arranged without a horizontal section. The fluidity of the cooling water and the oil stain in it in each pipe is large, and it is not easily blocked, so that the batcher will not leak water into the blast furnace.

[0020] 2. The lower end of the drain pipe is provided with the water-gas separation box. The box structure of the water-gas separation box enables the cooling water not to fill the box completely, providing a floating space for the gas. The cooling water and the gas can be separated in the water-gas separation box, and the gas will not be discharged along with the cooling water.

[0021] 3. The setting of the water-gas separation box also facilitates disconnecting the water-gas separation pipe from the drain pipe after connecting the water-gas separation pipe below it. They are not integrated, and the water-gas separation pipe is not directly connected to the cooling water drainage tank. The water-gas separation pipe can be set to have a large diameter, so that the cooling water will not fill the large-diameter water-gas separation pipe completely. The gas in the large-diameter water-gas separation pipe has a floating space, and the cooling water and the gas can also be separated in the water-gas separation pipe, and the gas will not be discharged along with the cooling water.

[0022] 4. The settings of the water-gas separation box and the water-gas separation pipe ensure that even if the cooling water and the gas are not completely separated in the drain pipe, they will definitely be separated after entering the water-gas separation box and the water-gas separation pipe. The gas will not be discharged along with the cooling water, improving the sealing effect.

[0023] 5. By providing the return gas pipe connected to the top of the furnace top distributor on the top of the water-gas separation box, a simple gas passage that is not shared with the cooling water drainage is provided for the floating of the gas. After the water and gas are separated in the water-gas separation box and the water-gas separation pipe, the gas floats more smoothly and will not form a sealed gas column and be discharged along with the cooling water, improving the sealing effect.

[0024] 6. The drain pipe below the cooling water drainage tank is not easily blocked, making the drainage smoother. At the same time, the water-gas separation in the water-gas separation box and the water-gas separation pipe, combined with the floating channel of the return gas pipe, also makes the water-gas separation smoother during the drainage process. The water seal effect of the water seal device for preventing gas leakage and draining sewage of the blast furnace top distributor of the present invention is better, and the operation is safer, more stable and reliable. Since the company adopted the water seal device for preventing gas leakage and draining sewage of the blast furnace top distributor of the present invention, no gas leakage accident has occurred so far. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural view of the water seal device for preventing gas leakage and draining sewage of the blast furnace top distributor of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The following describes in detail the preferred embodiments of the water seal device for preventing gas leakage and draining sewage of the blast furnace top distributor of the present invention with reference to the drawings:

[0027] As Figure 1As shown in the figure, a gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of a blast furnace includes a drain pipe 2, a water-gas separation box 3, a return air pipe 4, a water-gas separation pipe 5, a sewage discharge box 6, an upward-section drain pipe 7, a sewage drain trough 8, and a cooling water drain trough 1 located at the bottom of the burden distributor 100. The drain pipe 2, the return air pipe 4, the water-gas separation pipe 5, and the upward-section drain pipe 7 are all vertically arranged. The cooling water drain trough 1, the water-gas separation box 3, and the sewage discharge box 6 are arranged in sequence from top to bottom. The upper end of the drain pipe 2 is communicated with the cooling water drain trough 1, and the lower end is communicated with the top of the water-gas separation box 3. The lower end of the return air pipe 4 is communicated with the top of the water-gas separation box 3, and the upper end is communicated with the burden distributor 100 at the top of the blast furnace. The upper end of the water-gas separation pipe 5 is communicated with the bottom of the water-gas separation box 3, and the lower end is communicated with the top of the sewage discharge box 6. The sewage drain trough 8 is located above the sewage discharge box 6 and below the water-gas separation box 3. The lower end of the upward-section drain pipe 7 is communicated with the top of the sewage discharge box 6, and the upper end is communicated with the top of the sewage drain trough 8.

[0028] For the gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, the burden distributor 100 is located at the top of the blast furnace and is used for distributing burden to the blast furnace; a cooling water channel is arranged inside the burden distributor 100 for cooling the burden distributor 100; the bottom of the burden distributor 100 has the cooling water drain trough 1. After the cooling water channels inside the burden distributor 100 converge into the cooling water drain trough 1, external drainage is carried out through the cooling water drain trough 1. The structure of the burden distributor 100 is an existing structure, and the present utility model will not elaborate on it too much.

[0029] For the gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, the drain pipe 2 serves as the drainage channel of the cooling water drain trough 1 and is used for discharging the cooling water in the cooling water drain trough 1 into the water-gas separation box 3; the water-gas separation box 3 is of a box structure, and its broad inner chamber provides a floating space for gas, which is used for separating cooling water and gas; the return air pipe 4 serves as an air pipe. After being communicated with the burden distributor 100 and the blast furnace, it is used for the gas separated from the cooling water to return upward to the blast furnace and be enclosed in the blast furnace system; the water-gas separation pipe 5 is used for discharging the cooling water in the water-gas separation box 3 into the sewage discharge box 6; the sewage discharge box 6 is used for depositing the sediment in the cooling water and discharging sewage from the cooling water; the upward-section drain pipe 7 is used for discharging the cooling water in the sewage discharge box 6 into the sewage drain trough 8, and at the same time, together with the water-gas separation pipe 5 and the sewage discharge box 6, forms a U-shaped sealing structure for preventing the leakage of blast furnace gas; the sewage drain trough 8 is used for collecting cooling water.

[0030] The anti-gas-leakage drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, when in use, the cooling water in the cooling water drainage tank 1 is discharged into the gas-water separation tank 3 and the gas-water separation pipe 5 successively after passing through the drainage pipe 2. During the drainage process of the drainage pipe 2, the gas-water separation tank 3 and the gas-water separation pipe 5, gas-water separation can also be carried out. Among them, when the cooling water in the drainage pipe 2 is filled in the pipe in an unfilled state, gas-water separation can be carried out. The gas separated from the drainage pipe 2 returns directly to the blast furnace along the drainage pipe 2, and the separated cooling water enters the gas-water separation tank 3; the space in the gas-water separation tank 3 with a box structure is relatively large. When the cooling water enters the gas-water separation tank 3 from the drainage pipe 2 with a smaller diameter, it will not be discharged full of the tank. There is a gas floating space in the gas-water separation tank 3. The cooling water and gas discharged into the gas-water separation tank 3 are separated in the gas-water separation tank 3. The separated gas floats up and forms a passage with the blast furnace through the gas return pipe 4. The separated cooling water then enters the gas-water separation pipe 5; the gas-water separation pipe 5 is not directly connected to the cooling water drainage tank 1. The diameter of the gas-water separation pipe 5 is not affected by the diameter of the connection port of the cooling water drainage tank 1, and the diameter of the gas-water separation pipe 5 can also be set relatively large. The cooling water entering the gas-water separation pipe 5 will not be discharged full of the pipe. There is also a gas floating space in the gas-water separation pipe 5. The cooling water and gas discharged into the gas-water separation pipe 5 are separated in the gas-water separation pipe 5. The separated gas floats up and forms a passage with the blast furnace through the gas return pipe 4. The separated cooling water then enters the sewage discharge tank 6. The cooling water entering the sewage discharge tank 6 then discharges upward along the rising section drainage pipe 7 into the sewage drainage tank 8. In this way, the drainage and sewage discharge for preventing gas leakage of the burden distributor are realized.

[0031] The anti-gas-leakage drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model has the following advantages:

[0032] 1. The drainage pipe 2, the gas return pipe 4, the gas-water separation pipe 5 and the rising section drainage pipe 7 are all vertically arranged without a horizontal section. The fluidity of the cooling water and the oil stain in it in each pipe is large, and it is not easy to be blocked, resulting in water leakage from the burden distributor into the blast furnace.

[0033] 2. The gas-water separation tank 3 is arranged at the lower end of the drainage pipe 2. The box structure of the gas-water separation tank 3 enables the cooling water not to be filled in the tank full, and there is a floating space for gas. The cooling water and gas can be separated in the gas-water separation tank 3, and the gas will not be discharged along with the cooling water.

[0034] 3. The provision of the water-gas separation box 3 also facilitates disconnecting the water-gas separation pipe 5 from the drain pipe 2 after connecting the water-gas separation pipe 5 below it, such that they are not integrated. The water-gas separation pipe 5 is not directly connected to the cooling water drainage tank 1. The water-gas separation pipe 5 can be set to have a large diameter, so that cooling water will not fill the large-diameter water-gas separation pipe 5. There is a floating space for the gas in the large-diameter water-gas separation pipe 5, and separation of the cooling water and the gas can also be achieved within the water-gas separation pipe 5, and the gas will not be discharged along with the cooling water.

[0035] 4. The provision of the water-gas separation box 3 and the water-gas separation pipe 5 ensures that even if the cooling water and the gas are not completely separated within the drain pipe 2, they will definitely be separated after entering the water-gas separation box 3 and the water-gas separation pipe 5, and the gas will not be discharged along with the cooling water, improving the sealing effect.

[0036] 5. By providing the return gas pipe 4 connected to the top of the water-gas separation box 3 and communicating with the top charging device 100, a dedicated gas passage for the floating of the gas is provided that is not shared with the cooling water drainage, enabling the gas to float more smoothly after the separation of water and gas within the water-gas separation box 3 and the water-gas separation pipe 5, without forming a sealed gas column and being discharged along with the cooling water, thus improving the sealing effect.

[0037] 6. The drain pipe 2 below the cooling water drainage tank 1 is not easily blocked, facilitating smoother drainage. At the same time, the separation of water and gas in the water-gas separation box 3 and the water-gas separation pipe 5, combined with the floating passage of the return gas pipe 4, also enables smoother separation of water and gas during the drainage process. The water seal effect of the anti-gas leakage, drainage, and sewage discharge device for the top charging device of the blast furnace of the present utility model is better, and the operation is safer, more stable, and more reliable. Since the company adopted the anti-gas leakage, drainage, and sewage discharge device for the top charging device of the blast furnace of the present utility model, no gas leakage accidents have occurred so far.

[0038] For the anti-gas leakage, drainage, and sewage discharge device for the top charging device of the blast furnace of the present utility model, preferably, the number of the drain pipes 2 is several. The provision of several drain pipes 2 facilitates smooth drainage of the cooling water drainage tank 1.

[0039] For the anti-gas leakage, drainage, and sewage discharge device for the top charging device of the blast furnace of the present utility model, preferably, the bottom of the water-gas separation box 3 is of a conical structure, facilitating sewage discharge.

[0040] For the anti-gas leakage, drainage, and sewage discharge device for the top charging device of the blast furnace of the present utility model, preferably, the water-gas separation pipe 5 and the rising section drain pipe 7 are upright, and the water-gas separation pipe 5, the sewage discharge box 6, and the rising section drain pipe 7 form a U shape.

[0041] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, the diameter of the water-gas separation pipe 5 is limited to that the cooling water and gas entering the water-gas separation pipe 5 can be automatically separated and no sealed gas column will be formed in the water-gas separation pipe 5.

[0042] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, preferably, the diameter of the water-gas separation pipe 5 is not less than 20 cm. The water-gas separation pipe 5 with a diameter not less than 20 cm has a large enough diameter. When draining water, the water-gas separation pipe 5 will not be full of water, and the gas entering the water-gas separation pipe 5 can penetrate upward, and no sealed gas column will be formed in the water-gas separation pipe 5, and it will not leak out with the cooling water when discharged.

[0043] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, preferably, a sewage discharge port 61 is provided at the bottom of the sewage discharge box 6, and a sewage discharge valve 62 is installed on the sewage discharge port 61. The arrangement of the sewage discharge port 61 and the sewage discharge valve 62 thereon facilitates the opening of the sewage discharge valve 62 when the sewage discharge box needs to be repaired or cleaned, and the sewage in the sewage discharge box 6 can be discharged through the sewage discharge port 61.

[0044] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, preferably, a first end of a connecting pipe 9 is communicated with the water-gas separation pipe 5, a second end of the connecting pipe 9 is communicated with the rising section drain pipe 7, a bypass valve 90 is installed on the connecting pipe 9, a first maintenance valve 91 is installed on the water-gas separation pipe 5, the first maintenance valve 91 is located between the first end of the connecting pipe 9 and the sewage discharge box 6, a second maintenance valve 92 is installed on the rising section drain pipe 7, and the second maintenance valve 92 is located between the second end of the connecting pipe 9 and the sewage discharge box 6. During normal use, the bypass valve 90 is closed, the first maintenance valve 91 and the second maintenance valve 92 are opened, the cooling water in the water-gas separation pipe 5 passes through the sewage discharge box 6 and then is discharged into the sewage drainage tank 8 through the rising section drain pipe 7; when cleaning or maintaining the sewage discharge box, the bypass valve 90 is opened, the first maintenance valve 91 and the second maintenance valve 92 are closed, the cooling water in the water-gas separation pipe 5 passes through the connecting pipe 9 and then is discharged into the sewage drainage tank 8 through the rising section drain pipe 7, and the sewage discharge box 6 is isolated. At this time, it is convenient to clean or maintain the sewage discharge box 6.

[0045] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model. Preferably, a cleaning water pipe 10 is connected to the top of the sewage discharge tank 6, and a cleaning valve 101 is installed on the cleaning water pipe 10. The arrangement of the cleaning water pipe 10 and the cleaning valve 101 thereon facilitates the cleaning of the sewage discharge tank. During cleaning, the cleaning valve 101 is opened, and high-pressure water is introduced into the sewage discharge tank 6 through the cleaning water pipe 10, and the sewage discharge tank 6 is cleaned by the high-pressure water.

[0046] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model. Preferably, an exhaust pipe 11 is connected to the top of the sewage discharge tank 6, and an exhaust valve 111 is installed on the exhaust pipe 11. The installation height of the exhaust valve 111 is higher than the installation heights of the first maintenance valve 91 and the second maintenance valve 92. The arrangement of the exhaust pipe 11 and the exhaust valve 111 thereon can balance the air pressure inside and outside the sewage discharge tank 6, and then facilitate the introduction of high-pressure water into the sewage discharge tank 6 through the cleaning water pipe 10 to clean the sewage discharge tank 6, especially to clean the top of the sewage discharge tank 6. When cleaning the top of the sewage discharge tank 6, the sewage discharge valve 62 is closed, the exhaust valve 111 is opened, high-pressure water is introduced into the sewage discharge tank 6 through the cleaning water pipe 10, and after the high-pressure water fills to the top of the sewage discharge tank 6, the cleaning of the top of the sewage discharge tank 6 can be realized.

[0047] The gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model. Preferably, the bottom of the sewage discharge tank 6 is of a conical structure. The sewage discharge tank 6 has greater structural strength, is not easily deformed and air-leaked during the cleaning process, and is also convenient for sewage discharge.

[0048] In the gas leakage prevention, drainage and sewage discharge device for the burden distributor at the top of the blast furnace of the present utility model, during the operation of the blast furnace, affected by the air pressure at the top of the blast furnace, the liquid level height in the water-gas separation pipe 5 is usually lower than the liquid level height in the rising section drain pipe 7. When the blast furnace is not working, the liquid level height in the water-gas separation pipe 5 is consistent with the liquid level in the rising section drain pipe 7.

[0049] For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can also be made, which should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. A device for preventing gas leakage, draining water and discharging sewage of a blast furnace top burden distributor, characterized in that: It includes a drain pipe, a water-gas separation box, a return air pipe, a water-gas separation pipe, a sewage discharge box, an ascending section drain pipe, a sewage drainage trough, and a cooling water drainage trough located at the bottom of the distributor. The drain pipe, the return air pipe, the water-gas separation pipe, and the ascending section drain pipe are all vertically arranged. The cooling water drainage trough, the water-gas separation box, and the sewage discharge box are arranged in sequence from top to bottom. The upper end of the drain pipe is communicated with the cooling water drainage trough, and the lower end is communicated with the top of the water-gas separation box. The lower end of the return air pipe is communicated with the top of the water-gas separation box, and the upper end is communicated with the top of the furnace top distributor. The upper end of the water-gas separation pipe is communicated with the bottom of the water-gas separation box, and the lower end is communicated with the top of the sewage discharge box. The sewage drainage trough is located above the sewage discharge box and below the water-gas separation box. The lower end of the ascending section drain pipe is communicated with the top of the sewage discharge box, and the upper end is communicated with the top of the sewage drainage trough.

2. The blast furnace top batcher gas leakage prevention, drainage and sewage discharge device according to claim 1, characterized in that: The number of the drain pipes is several.

3. The blast furnace top batcher anti-gas-leakage drainage and sewage discharge device according to claim 1, characterized in that: The bottom of the water-gas separation box is of a conical structure.

4. The blast furnace top batcher gas leakage prevention, drainage and sewage discharge device according to claim 1, characterized in that: The water-gas separation pipe and the ascending section drain pipe are vertical, and the water-gas separation pipe, the sewage discharge box, and the ascending section drain pipe are in a U shape.

5. The blast furnace top batcher gas leakage prevention, drainage and sewage discharge device according to claim 1, characterized in that: The pipe diameter of the water-gas separation pipe is limited such that the cooling water and the gas entering the water-gas separation pipe can be automatically separated and no sealed gas column will be formed inside the water-gas separation pipe.

6. The blast furnace top batcher anti-gas-leakage drainage and sewage discharge device according to claim 1, characterized in that: The pipe diameter of the water-gas separation pipe is not less than 20 cm.

7. The blast furnace top batcher anti-gas leakage drainage and sewage discharge device according to claim 1, characterized in that: A sewage discharge port is provided at the bottom of the sewage discharge box, and a sewage discharge valve is installed on the sewage discharge port.

8. The blast furnace top batcher anti-gas-leakage drainage and sewage discharge device according to claim 7, characterized in that: The first end of a connecting pipe is communicated with the water-gas separation pipe, the second end of the connecting pipe is communicated with the ascending section drain pipe, a bypass valve is installed on the connecting pipe, a first maintenance valve is installed on the water-gas separation pipe, the first maintenance valve is located between the first end of the connecting pipe and the sewage discharge box, a second maintenance valve is installed on the ascending section drain pipe, and the second maintenance valve is located between the second end of the connecting pipe and the sewage discharge box.

9. The blast furnace top batcher gas leakage prevention, drainage and sewage discharge device according to claim 8, characterized in that: A cleaning water pipe is connected to the top of the sewage discharge box, and a cleaning valve is installed on the cleaning water pipe; an exhaust pipe is connected to the top of the sewage discharge box, and an exhaust valve is installed on the exhaust pipe. The installation height of the exhaust valve is higher than the installation heights of the first maintenance valve and the second maintenance valve.

10. The blast furnace top batcher anti-gas-leakage drainage and sewage discharge device according to claim 1, characterized in that: The bottom of the sewage discharge box is of a conical structure.

Images