Low-temperature methanol washing underground tank structure

Abstract

The utility model belongs to the technical field of coal methanol tail gas treatment, and relates to a low-temperature methanol washing underground tank environment which comprises an air inlet header pipe, an air inlet branch pipe and a booster pump, the air inlet branch pipe is arranged in the depth direction of the pit, and the outlet end of the air inlet branch pipe directly faces the bottom position in the pit. The outlet end of the air inlet header pipe is communicated with the inlet ends of the air inlet branch pipes; the booster pump is mounted on the air inlet header pipe; according to the utility model, when polluted methanol leaks, air is blown to the bottom of the pit through the arranged air inlet branch pipe, toxic and harmful gases accumulated in the pit are rapidly diluted, and the concentration of the toxic and harmful gases in the pit is reduced, so that the concentration of the toxic and harmful gases is lower when an operator enters the pit to operate; meanwhile, the air inlet branch pipe continuously blows air into the pit, the gloomy, cold, humid and oxygen-deficient environment in the pit is improved, the accident potential caused by environmental factors is reduced, and the operation safety of the operating personnel is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal methanol tail gas treatment, and specifically relates to a low-temperature methanol washing underground tank structure. BACKGROUND

[0002] In the coal chemical process, the underground tank of the low-temperature methanol washing device is installed in the deep underground, which is used to collect the low-methanol contaminated methanol. The low-methanol contaminated methanol dissolves a large amount of toxic and harmful gases, such as hydrogen sulfide, carbon monoxide, nitrogen and methanol vapor, etc. The pit environment where the underground tank is located is easy to form a gas accumulation area due to its depth, especially in the case of contaminated methanol leakage, the bottom of the pit will quickly accumulate high-concentration toxic and harmful gases.

[0003] There is some research on the structure of the low-temperature methanol washing underground tank in the prior art, referring to the patent document with the application number 202120579655.4, which discloses a methanol underground tank protection system, belonging to the technical field of coal chemical contaminated methanol treatment equipment, comprising: a methanol underground tank; a total contaminated methanol pipeline, which is arranged on the methanol underground tank, the total contaminated methanol pipeline is connected with the methanol underground tank, which is used to guide the contaminated methanol into the methanol underground tank; a low-pressure hydrogen-rich cold flare pipeline, which is arranged on the methanol underground tank, the low-pressure hydrogen-rich cold flare pipeline is connected with the methanol underground tank through a pipeline, which is used to guide the toxic and harmful gases out of the methanol underground tank, and reduce the pressure in the methanol underground tank.

[0004] As can be seen, through the total contaminated methanol pipeline and the low-pressure hydrogen-rich cold flare pipeline, the toxic and harmful gases in the underground tank are partially guided out and the pressure is controlled. However, when the contaminated methanol leaks, a large amount of toxic and harmful gases will still accumulate at the bottom of the pit, which makes the operating personnel have the risk of poisoning and suffocation when entering the pit for operation, and the internal environment of the pit is cold and humid, and oxygen-deficient, which further increases the difficulty of rescue after the accident. UTILITY MODEL CONTENT

[0005] In order to solve the technical problem that when the contaminated methanol leaks, a large amount of toxic and harmful gases will accumulate at the bottom of the pit, which causes the operating personnel to have the risk of poisoning and suffocation when entering the pit for operation in the background technology, the utility model provides a low-temperature methanol washing underground tank structure.

[0006] The low-temperature methanol washing underground groove structure is characterized in that when the polluted methanol leaks, the toxic and harmful gas released is accumulated at the bottom of the pit, air is blown to the pit bottom through the air inlet branch pipe arranged, the toxic and harmful gas accumulated in the pit is rapidly diluted, the concentration of the toxic and harmful gas in the pit is reduced, the concentration of the toxic and harmful gas is low when the operating personnel enter the pit to operate, the risk of poisoning and asphyxiation of the operating personnel is reduced, meanwhile, air is continuously blown into the pit through the air inlet branch pipe, the cold and damp and oxygen-deficient environment in the pit is improved, the hidden danger caused by the environmental factors is reduced, and the operation safety of the operating personnel is improved.

[0007] To solve the above technical problems, the utility model provides the following technical scheme:

[0008] A low-temperature methanol washing underground groove structure, the underground groove is arranged in a pit, comprising: an air inlet main pipe, an air inlet branch pipe and a booster pump; the air inlet branch pipe is arranged along the depth direction of the pit, and the outlet end of the air inlet branch pipe is opposite to the bottom position inside the pit, for blowing air to the pit bottom; the outlet end of the air inlet main pipe is communicated with the inlet end of the air inlet branch pipe, for providing compressed air to the air inlet branch pipe; the booster pump is installed on the air inlet main pipe, for providing power for the compressed air; wherein the underground groove is arranged in the pit.

[0009] In a specific implementation, the ratio between the height of the outlet end of the air inlet branch pipe from the pit bottom and the pit depth is 1:(5-10).

[0010] In a specific implementation, the outlet end of the air inlet branch pipe is connected with a booster nozzle.

[0011] In a specific implementation, the outlet end of the booster nozzle is opposite to the underground groove.

[0012] In a specific implementation, the air inlet branch pipe and the booster nozzle are connected through a hose.

[0013] In a specific implementation, a plurality of air inlet branch pipes are arranged, and the air inlet branch pipes are arranged along the inner wall of the pit; the inlet end of each air inlet branch pipe is communicated with the air inlet main pipe, and the outlet end of each air inlet branch pipe is opposite to the bottom position of the pit.

[0014] In a specific implementation, a first regulating valve is installed on each air inlet branch pipe.

[0015] In a specific implementation, the low-temperature methanol washing underground groove structure further comprises a regulating assembly for regulating the air volume in the air inlet main pipe, and the regulating assembly comprises a second regulating valve; the second regulating valve is installed on the air inlet main pipe.

[0016] In one specific implementation, the air intake main is in communication with each air intake branch through an adapter pipe.

[0017] In one specific implementation, a plurality of locking members for fixing the position of the spray head are arranged on the hose, and the plurality of locking members are distributed along the length direction of the hose.

[0018] In summary, the low-temperature methanol washing underground tank structure has the following beneficial technical effects:

[0019] 1. The low-temperature methanol washing underground tank structure, when the dirty methanol leaks, the toxic and harmful gas released at the bottom of the pit is blown to the bottom of the pit through the air intake branch, the toxic and harmful gas accumulated in the pit is rapidly diluted, the concentration of the toxic and harmful gas in the pit is reduced, the concentration of the toxic and harmful gas is low when the operating personnel enters the pit to work, thereby reducing the risk of poisoning and suffocation of the operating personnel, and at the same time, the air is continuously blown into the pit through the air intake branch, the cold and humid, oxygen-deficient environment inside the pit is improved, the accident hidden danger caused by environmental factors is reduced, and the operation safety of the operating personnel is improved.

[0020] 2. The low-temperature methanol washing underground tank structure, the booster spray head is connected with the air intake branch through the hose, when the dirty methanol leaks, the operating personnel adjusts the position of the booster spray head through the hose according to the actual need of the area to be overhauled, the flexibility of air circulation in the pit is improved, and the reliability of the low-temperature methanol washing underground tank structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the low-temperature methanol washing underground tank structure.

[0022] Explanation of reference signs: 1, air intake main; 2, air intake branch; 3, second regulating valve; 4, third regulating valve; 5, pit. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be further explained and described below in combination with the drawings and embodiments, but the utility model is not limited to the implementation modes described below.

[0024] In the coal chemical process, after the low-temperature methanol washing device goes through the processes of coal gasification, synthesis gas purification and low-temperature methanol washing, low-methanol dirty methanol containing impurities is generated; then, the dirty methanol is collected into an underground tank and then transported to subsequent treatment equipment through the underground tank for further treatment of the dirty methanol to recover useful substances, and the toxic and harmful gas is treated according to environmental protection requirements.

[0025] In the utility model, the underground tank is placed in a pit 5 with a size of 5*9*9m (width*length*depth), and the volume of the underground tank is 25m3 In order to optimize the environment of the underground groove, improve the safety of the operating personnel entering the pit 5 when the methanol leakage occurs, the utility model provides a low temperature methanol washing underground groove structure.

[0026] With reference to Figure 1 A low temperature methanol washing underground groove structure, comprising: air inlet main pipe 1, air inlet branch pipe 2 and booster pump. Air inlet branch pipe 2 is arranged along the depth direction of pit 5, and the outlet end of air inlet branch pipe 2 is opposite to the bottom position inside pit 5, for blowing air to the bottom of pit 5; the outlet end of air inlet main pipe 1 is communicated with the inlet end of air inlet branch pipe 2, for providing compressed air to air inlet branch pipe 2; booster pump is installed on air inlet main pipe 1, for providing power for compressed air.

[0027] With reference to Figure 1 The ratio between the height of the outlet end of air inlet branch pipe 2 from the pit bottom and the depth of pit 5 is 1: (5-10).

[0028] Specifically, the ratio between the height of the outlet end of air inlet branch pipe 2 from the pit bottom and the depth of pit 5 can be 1:5, 1:7.5 or 1:10, and the appropriate height of the outlet end of air inlet branch pipe 2 from the pit bottom is determined according to the depth of pit 5 and the volume of the underground groove, to ensure that air inlet branch pipe 2 blows compressed air to the bottom of pit 5, so as to rapidly dilute a large amount of toxic and harmful gas accumulated at the bottom of pit 5. Preferably, the ratio between the height of the outlet end of air inlet branch pipe 2 from the pit bottom and the depth of pit 5 is 1:7.5; in the utility model, the depth of pit 5 is 9m, and the height of the outlet end of air inlet branch pipe 2 from the pit bottom is 1.2m.

[0029] Embodiment 1:

[0030] With reference to Figure 1 In the low temperature methanol washing underground groove structure of the embodiment, the outlet end of air inlet branch pipe 2 is connected with a booster nozzle.

[0031] Specifically, the outlet end of the booster nozzle can be opposite to the bottom of pit 5 or opposite to the underground groove, and the compressed air at the outlet end of air inlet branch pipe 2 is boosted by the booster nozzle, so as to greatly improve the flow rate of air around the booster nozzle. Preferably, the outlet end of the booster nozzle is opposite to the underground groove.

[0032] In the embodiment, the booster nozzle is arranged, so as to facilitate the air flow rate at the bottom of pit 5; and the booster nozzle is arranged opposite to the underground groove, so as to facilitate the reduction of accumulation of toxic and harmful gas around the underground groove, and improve the safety of the operating personnel when operating the underground groove.

[0033] Embodiment 2:

[0034] With reference toFigure 1 The low-temperature methanol washing underground tank structure of the embodiment, on the basis of the embodiment 1, the air inlet branch pipe 2 is connected with the pressurizing nozzle through a hose.

[0035] Specifically, the hose can be a rubber hose, a metal hose, a plastic hose, etc., and the pressurizing nozzle can be connected with the air inlet branch pipe 2 in any of the above manners. Preferably, the hose is a rubber hose.

[0036] In the embodiment, when the contaminated methanol leaks, the position of the pressurizing nozzle can be adjusted by the hose according to the actual maintenance area, so that the flexibility of air circulation is improved, and the reliability of the low-temperature methanol washing underground tank structure is further improved.

[0037] Embodiment 3:

[0038] With reference to Figure 1 The low-temperature methanol washing underground tank structure of the embodiment, on the basis of the embodiment 2, a plurality of locking members for fixing the position of the nozzle are arranged on the hose, and the plurality of locking members are distributed along the length direction of the hose.

[0039] Specifically, the locking member can be a clamp, a locking ring, a buckle, etc., and the locking member can be arranged to fix the position of the pressurizing nozzle after adjustment. Preferably, the locking member is a clamp, and the clamp is connected with the hose through a fastening bolt.

[0040] In the embodiment, the locking member is arranged to fix the position of the pressurizing nozzle after adjustment, so that the pressurizing nozzle is prevented from shaking during use, and the reliability of the low-temperature methanol washing underground tank structure is further improved.

[0041] Embodiment 4:

[0042] With reference to Figure 1 The low-temperature methanol washing underground tank structure of the embodiment, the air inlet branch pipe 2 is arranged in plurality, and the plurality of air inlet branch pipes 2 are arranged along the inner wall of the pit 5; the inlet end of each air inlet branch pipe 2 is communicated with the air inlet main pipe 1, and the outlet end of each air inlet branch pipe 2 is opposite to the bottom position of the pit 5.

[0043] In the embodiment, the plurality of air inlet branch pipes 2 are arranged to further improve the circulation rate of air around the underground tank and reduce the accumulation of toxic and harmful gases at the bottom of the pit 5.

[0044] Embodiment 5:

[0045] With reference to Figure 1 The low-temperature methanol washing underground tank structure of the embodiment, on the basis of the embodiment 4, the first regulating valve is arranged on each air inlet branch pipe 2.

[0046] In the embodiment, the first adjusting valve is arranged, so that the operator can adjust the compressed air flow in each air inlet branch pipe 2 according to actual needs, and the precise adjustment of the compressed air flow is realized.

[0047] Embodiment 6:

[0048] With reference to Figure 1 The low-temperature methanol washing underground tank structure further comprises an adjusting assembly for adjusting the air volume in the air inlet main pipe 1, and the adjusting assembly comprises a second adjusting valve 3.

[0049] In the embodiment, the second adjusting valve 3 is arranged, so that the operator can adjust the air volume in the air inlet main pipe 1 according to actual needs, different actual needs are met, and the flexibility of the low-temperature methanol washing underground tank structure is improved.

[0050] Embodiment 7:

[0051] With reference to Figure 1 The low-temperature methanol washing underground tank structure, the air inlet main pipe 1 is communicated with each air inlet branch pipe 2 through a switching pipeline, and the switching pipeline is provided with a third adjusting valve 4 for adjusting the compressed air flow in the switching pipeline.

[0052] In the embodiment, the switching pipeline is arranged, so that the air inlet main pipe 1 and the air inlet branch pipe 2 are connected, and the operation is convenient.

[0053] The working principle of the low-temperature methanol washing underground tank structure is as follows: when the dirty methanol leaks, the compressed air is sent into the air inlet main pipe 1 through the booster pump; the compressed air sequentially passes through the switching pipeline, the air inlet branch pipe 2 and the hose, and then is blown to the surroundings of the underground tank through the booster nozzle, so that the high-concentration toxic and harmful gas around the underground tank is rapidly diluted, and the working environment of the operator is optimized.

[0054] The preferable embodiments of the utility model are not limited to the protection scope of the utility model, and therefore: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A low temperature methanol wash underground tank structure, the underground tank being placed in a pit (5), characterized in that, The utility model relates to a low-temperature methanol washing underground groove structure, including: Air inlet main pipe (1), air inlet branch pipe (2) and booster pump; The air inlet branch pipe (2) is arranged along the depth direction of the pit (5), and the outlet end of the air inlet branch pipe (2) is opposite to the bottom position inside the pit (5), for blowing air to the bottom of the pit (5); The outlet end of the air inlet main pipe (1) is communicated with the inlet end of the air inlet branch pipe (2), for providing compressed air to the air inlet branch pipe (2); The booster pump is installed on the air inlet main pipe (1), for providing power for the compressed air.

2. The rectisol underground tank structure according to claim 1, characterized in that: The ratio range between the height of the outlet end of the air inlet branch pipe (2) from the pit bottom and the pit (5) depth is 1: (5-10).

3. The rectisol underground tank structure according to claim 2, characterized in that: The outlet end of the air inlet branch pipe (2) is connected with the booster nozzle.

4. The rectisol underground tank structure according to claim 3, characterized in that: The outlet end of the booster nozzle is opposite to the underground groove.

5. The rectisol underground tank structure according to claim 4, characterized in that: The air inlet branch pipe (2) and the booster nozzle are connected through the hose.

6. The rectisol underground tank structure according to claim 5, characterized in that: The air inlet branch pipe (2) is provided with a plurality of air inlet branch pipes (2), and the plurality of air inlet branch pipes (2) are arranged along the inner wall of the pit (5). The inlet end of each air inlet branch pipe (2) is communicated with the air inlet main pipe (1), and the outlet end of each air inlet branch pipe (2) is opposite to the bottom position of the pit (5).

7. The rectisol underground tank structure according to claim 6, characterized in that: A first regulating valve is installed on each air inlet branch pipe (2).

8. The rectisol underground tank structure according to any one of claims 1 to 7, characterized in that: The low-temperature methanol washing underground groove structure further includes a regulating assembly for adjusting the air volume in the air inlet main pipe (1), and the regulating assembly includes a second regulating valve (3). The second regulating valve (3) is installed on the air inlet main pipe (1).

9. The rectisol underground tank structure according to claim 1, characterized in that: The air inlet main pipe (1) is communicated with each air inlet branch pipe (2) through the adapter pipe.

10. The rectisol underground tank structure according to claim 5, characterized in that: A plurality of locking members for fixing the position of the nozzle are arranged on the hose, and the plurality of locking members are distributed along the length direction of the hose.

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