Metallurgical gas diffusion system capable of preventing leakage

Abstract

The utility model discloses a metallurgical gas diffusion system capable of preventing leakage. The metallurgical gas diffusion system comprises a water sealing device, a diffusion tower, a first gas inlet pipe, a second gas inlet pipe and an exhaust pipe, a partition plate is arranged in the water sealing device and higher than the water surface, the water sealing device is divided into a first cavity and a second cavity, and the upper portion of the first cavity is communicated with the upper portion of the second cavity. One ends of the first gas inlet pipe and the second gas inlet pipe are connected into the main gas pipe in parallel, and the other ends are respectively inserted below the water surfaces of the first cavity and the second cavity; the top of the water sealing device is connected with the diffusing tower through an exhaust pipe. The utility model solves the leakage problem of the metallurgical gas diffusion system, and has the characteristics of high safety and strong practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of gas emission, in particular to a metallurgical gas emission system capable of preventing leakage. Background Art

[0002] During the smelting production of iron and steel enterprises, a large amount of blast furnace gas and converter gas will be generated. These gases are transported through pipelines and then used in industrial production, such as supplying gas-fired power boilers or for rolling steel heating furnaces for steel rolling. The reuse of these gases greatly reduces the enterprise cost. Due to changes in the gas consumption of gas users in the pipeline network and factors such as sudden equipment failures, sometimes it is necessary to emit gas to ensure that the pipeline network pressure is within the normal and safe operating range. In actual gas emission, due to the large amount of impurities in metallurgical gas, it is easy to accumulate at the valve, or due to the wear of the opening and closing of the valve itself, ultimately affecting the closing and sealing performance of the valve, that is, the valve cannot be closed properly; this often causes unnecessary gas emission, which is not only a waste but also affects safe production.

[0003] The gas emission system disclosed in the Chinese patent with the application number CN201621062404.4 and the name "Blast furnace gas emission system" includes a gas pipeline and an emission chimney. The gas pipeline is vertically connected to the emission chimney, and a spectacle valve, a regulating butterfly valve, a flat gate valve, and a pipeline compensator are installed on the pipeline. The regulating butterfly valve and the flat gate valve are controlled by a control system in a linkage manner. This patent uses a light single-gate flat gate valve to make up for the shortcoming of the butterfly valve not closing tightly, but it still uses a mechanical valve to reduce the probability of leakage, and the above-mentioned problems have not been well solved. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects of the existing technology and provide a metallurgical gas emission system capable of preventing leakage to solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A metallurgical gas emission system capable of preventing leakage includes a water seal device, an emission tower, a first inlet pipe, a second inlet pipe, and an exhaust pipe;

[0007] A partition is arranged inside the water seal device. The height of the partition is higher than the water surface, dividing the water seal device into a first chamber and a second chamber, and the first chamber and the second chamber are connected in communication at the upper part;

[0008] One ends of the first inlet pipe and the second inlet pipe are connected in parallel to the main gas pipe, and the other ends are respectively inserted below the water surface of the first chamber and the second chamber;

[0009] The top of the water seal device is connected to the emission tower through an exhaust pipe.

[0010] In the above metallurgical gas dispersion system capable of preventing leakage, a water inlet and a drain outlet are further provided on the water seal device; U-shaped bends are provided at the ends of the first inlet pipe and the second inlet pipe inserted below the water surface, and the air outlet faces upward; two drain outlets are provided, respectively located in the first chamber and the second chamber, and their heights are respectively lower than the air outlets of the first inlet pipe and the second inlet pipe; the number of water inlets is two, respectively supplying water to the first chamber and the second chamber.

[0011] In the above metallurgical gas dispersion system capable of preventing leakage, the bottom of the first chamber is set to be sloped, a sewage outlet is provided at the lowest point of the slope, and a water spray nozzle is provided at the highest point of the slope; a sewage disposal device is also provided in the second chamber, which has the same structure as the first chamber.

[0012] In the above metallurgical gas dispersion system capable of preventing leakage, a first valve and a second valve are respectively provided on the first inlet pipe and the second inlet pipe, and a third valve is provided on the main gas pipe.

[0013] In the above metallurgical gas dispersion system capable of preventing leakage, a water level gauge is provided outside the water seal device. Beneficial effects

[0014] Compared with the prior art, the utility model has the following advantages: First, a water seal device is adopted, and by changing the depth of water, that is, adjusting the distance between the water surface and the air outlets of the first inlet pipe and the second inlet pipe, the maximum pressure of the sealed gas can be changed, and unnecessary leakage of the gas dispersion system can be prevented. Second, two chambers are provided in the water seal device. According to the dispersion requirements, the first inlet pipe and the second inlet pipe can be dispersed separately or simultaneously, without mutual influence. Third, the U-shaped bends of the first inlet pipe and the second inlet pipe can prevent the gas from flowing out accidentally from the drain outlet during drainage. After the air outlet faces upward, the gas naturally overflows upward. Fourth, the bottoms of the two chambers of the water seal device are set to be sloped, and a sewage outlet and a water spray nozzle are provided to clean the sludge formed by the gas dust deposited at the bottom. Description of the drawings

[0015] The following further details the utility model in conjunction with the drawings.

[0016] Figure 1 is the overall structural schematic diagram of the utility model;

[0017] Figure 2 is the structural schematic diagram of the water seal device of the utility model;

[0018] Each label in the figure respectively represents:

[0019] 1. Water sealing device, 1-1 partition board, 1-2 first chamber, 1-3 second chamber, 1-2-1 sewage outlet, 1-2-2 water spray nozzle, 2 discharge tower, 3 first intake pipe, 3-1 first valve, 4 second intake pipe, 4-1 second valve, 5 exhaust pipe, 5-1 sixth valve, 6 main gas pipe, 6-1 third valve, 7 water inlet, 7-1 fourth valve, 8 drain outlet, 8-1 fifth valve. Specific implementation mode

[0020] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0021] See Figures 1 to 2 , the present utility model includes a water sealing device 1, a discharge tower 2, a first intake pipe 3, a second intake pipe 4, and an exhaust pipe 5. A partition board 1-1 is arranged in the water sealing device 1. The height of the partition board 1-1 is higher than the water surface, and the water sealing device 1 is divided into a first chamber 1-2 and a second chamber 1-3. The first chamber 1-2 and the second chamber 1-3 are connected in communication at the upper part. One ends of the first intake pipe 3 and the second intake pipe 4 are connected in parallel to the main gas pipe 6, and the other ends are respectively inserted below the water surface of the first chamber 1-2 and the second chamber 1-3; the top of the water sealing device 1 is connected to the discharge tower 2 through the exhaust pipe 5. A pressure sensor or a pressure gauge can be arranged in the main gas pipe 6 to monitor the pressure change of the main gas pipe network. A sixth valve 5-1 is arranged on the exhaust pipe 5, and the sixth valve 5-1 is normally open and can be closed when equipment maintenance or other work is required.

[0022] By changing the depth of the water, that is, adjusting the distance from the water surface to the air outlet of the first intake pipe 3 and the second intake pipe 4, the maximum pressure that can seal the gas can be changed. Taking blast furnace gas as an example, under normal production conditions, the gas pressure from the pipe network to the user generally fluctuates between 5KP - 16KP. When an abnormal situation causes the gas pressure to be too high, the gas starts to be discharged. When the overpressure is relatively small, only the first intake pipe 3 can be opened for discharging. When the overpressure is too high and the discharging is slow, the first intake pipe 3 and the second intake pipe 4 can be discharged together. The first intake pipe 3 can adopt a pipe fitting with a diameter of DN600, the second intake pipe 4 can adopt a pipe fitting with a diameter of DN800, and the main gas pipe 6 generally adopts a pipe fitting with a diameter of DN1200. The advantage of setting it as two chambers is that the first intake pipe 3 and the second intake pipe 4 can be discharged separately without affecting each other.

[0023] For the purpose of achieving rapid dispersion, during dispersion, the water in the water seal device 1 should be drained. Therefore, a water inlet 7 and a drain outlet 8 are also provided on the water seal device 1. The ends of the first gas inlet pipe 3 and the second gas inlet pipe 4 inserted below the water surface are provided with U-shaped bends, and the gas outlet faces upward; there are 2 drain outlets 8, which are respectively located in the first chamber 1-2 and the second chamber 1-3, and their heights are respectively lower than the gas outlets of the first gas inlet pipe 3 and the second gas inlet pipe 4; the number of water inlets 7 is 2, which are located above the first chamber 1-2 and the second chamber 1-3, and supply water to the first chamber 1-2 and the second chamber 1-3 respectively. The above-mentioned U-shaped bend is provided to prevent gas from leaking out incidentally from the drain outlet during drainage. After the gas outlet faces upward, the gas naturally overflows upward. Fourth valves 7-1 and fifth valves 8-1 are respectively provided on the water inlet 7 and the drain outlet 8. In order to achieve rapid drainage, a drainage pump can also be installed on the drain pipe connected to the drain outlet 8 to achieve rapid drainage and realize the purpose of rapid dispersion. The direction indicated by the arrow in the figure is the flow direction of water or gas.

[0024] Since metallurgical gas contains a large amount of impurities such as dust, during operation, sludge will inevitably be deposited in the water. During drainage, it is very difficult to drain the sludge. The following solution can be adopted. The bottom of the first chamber 1-2 is set in a slope shape. A sewage outlet 1-2-1 is provided at the lowest point of the slope shape, and a water spray nozzle 1-2-2 is provided at the highest point of the slope shape. The water spray nozzle 1-2-2 is connected to a high-pressure water pump and a water source. The number of water spray nozzles 1-2-2 can be set to 5-8, or appropriately increased or decreased according to the bottom space of the first chamber 1-2; the second chamber 1-3 is also provided with a sewage disposal device, which has the same structure as the first chamber 1-2.

[0025] For the convenience of control and pipeline maintenance, the following solution can be adopted: First valves 3-1 and second valves 4-1 are respectively provided on the first gas inlet pipe 3 and the second gas inlet pipe 4, and a third valve 6-1 is provided on the main gas pipe 6. The third valve 6-1 can adopt a blind plate valve. The third valve 6-1 is in an open state during operation. The opening and closing of the dispersion are completed by the first valve 3-1 and the second valve 4-1. When the pipeline needs to be maintained, the third valve 6-1 can be closed. In order to facilitate observing the water level, a water level gauge is provided outside the water seal device 1. The number of water level gauges is 2, which are respectively connected to the first chamber 1-2 and the second chamber 1-3.

[0026] For the above design, an automatic control method can be adopted. A pressure sensor is set in the main gas pipe 6, and the output of the pressure sensor is connected to the input end of the CPU. The output end of the CPU is respectively connected to a relay through a triode amplifier circuit, and then respectively connected to control the first valve 3-1, the second valve 4-1, the fourth valve 7-1, the fifth valve 8-1, and the drainage pump. The CPU can select a C8051F340 series chip, the 8051F340-GQR model of the SILICON LABS brand, and its number of I / O ports is 40, which can fully meet the requirements. The first valve 3-1 and the second valve 4-1 can adopt electric butterfly valves, and the fourth valve 7-1 and the fifth valve 8-1 can adopt electric butterfly valves or gate valves.

Claims

1. A leak-proof metallurgical gas release system, comprising a water sealing device (1), a release tower (2), a first air inlet pipe (3), a second air inlet pipe (4), and an exhaust pipe (5); A partition (1-1) is provided in the water sealing device (1); the partition (1-1) is higher than the water surface and separates the water sealing device (1) into a first chamber (1-2) and a second chamber (1-3); the first chamber (1-2) and the second chamber (1-3) are connected at the top; One end of the first air inlet pipe (3) and the second air inlet pipe (4) are connected in parallel to the main gas pipe (6), and the other ends are respectively inserted below the water surface of the first chamber (1-2) and the second chamber (1-3); The top of the water sealing device (1) is connected to the discharge tower (2) via an exhaust pipe (5).

2. The leak-proof metallurgical gas release system according to claim 1, characterized in that: The water sealing device (1) is also provided with a water inlet (7) and a water outlet (8); a U-shaped bend is provided at the end of the first air inlet pipe (3) and the second air inlet pipe (4) inserted below the water surface, and the air outlet faces upward; two water outlets (8) are provided, respectively located in the first cavity (1-2) and the second cavity (1-3), and their heights are respectively lower than the air outlets of the first air inlet pipe (3) and the second air inlet pipe (4); the number of water inlets (7) is two, and water is supplied to the first cavity (1-2) and the second cavity (1-3) respectively.

3. The leak-proof metallurgical gas release system according to claim 1, characterized in that: The bottom of the first chamber (1-2) is arranged in a slope shape, a sewage outlet (1-2-1) is arranged at the lowest point of the slope, and a water spray nozzle (1-2-2) is arranged at the highest point of the slope; the second chamber (1-3) is also arranged with a sewage discharge device, which has the same structure as the first chamber (1-2).

4. The leak-proof metallurgical gas release system according to claim 1, characterized in that: A first valve (3-1) and a second valve (4-1) are respectively provided on the first air intake pipe (3) and the second air intake pipe (4), and a third valve (6-1) is provided on the main gas pipe (6).

5. The leak-proof metallurgical gas release system according to claim 1, characterized in that: A water level gauge is arranged outside the water sealing device (1).

Images