Acid tail gas absorption treatment device

Abstract

The utility model relates to the technical field of tail gas absorption, in particular to an acid tail gas absorption treatment device which comprises a circulating tank, alkali liquor is contained in the circulating tank, a partition plate is arranged in the circulating tank, the bottom of the partition plate is located below the liquid level of the alkali liquor, and the partition plate divides an inner cavity of the circulating tank into a left cavity and a right cavity. The liquid level of the alkali liquor divides the left cavity and the right cavity into a left gas cavity and a left liquid cavity as well as a right gas cavity and a right liquid cavity respectively; a left gas inlet pipe, a right gas inlet pipe, a left absorption tower and a right absorption tower are arranged at the upper part of the circulating tank, the left gas inlet pipe communicates with the bottom of the left absorption tower through a left gas cavity, and the right gas inlet pipe communicates with the bottom of the right absorption tower through a right gas cavity; the left gas inlet pipe is connected with a tail gas inlet pipe which is connected with a right gas inlet pipe through a first communicating gas pipe. A left gas outlet pipe is arranged at the top of the left absorption tower, a right gas outlet pipe is arranged at the top of the right absorption tower, and the left gas outlet pipe is connected with the right gas inlet pipe through a gas guide pipe and is connected with the right gas outlet pipe through a communicating gas pipe II. The equipment investment is reduced, the operation is safe and convenient, and the continuous operation can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas absorption technical field, concretely relates to acidic tail gas absorption treatment device. BACKGROUND

[0002] In the storage and use process of chemical raw materials containing chlorine, phosgene and the like, due to the existence of trace leakage in the sealing surface of flange, valve and pump sealing, under normal circumstances, the closed plant room emitting the above-mentioned toxic and harmful gas needs to be kept mechanical ventilation, and the ventilation frequency is not less than 6 times / h. When an accident occurs, a large amount of toxic and harmful gas leaks, at this time, the closed plant room needs to be opened for accident ventilation, and the ventilation frequency is not less than 12 times / h. The acidic tail gas generated by mechanical ventilation and accident ventilation needs to be absorbed by alkali liquor before being discharged. When conventionally designed, the diameter of the absorption tower needs to be determined according to the accident air volume, and the packing height in the tower needs to be determined according to the absorption effect. However, the probability of an accident occurring in actual production is very small, and most of the time is normal production. Therefore, when the diameter of the absorption tower is designed according to the accident air volume, the equipment investment is increased, the packing height is high, the height of the absorption device needs to be increased, and the equipment strength is required to be higher; in addition, when the absorption tower needs to be overhauled, the production device must be stopped, which affects normal production activities. CONTENT OF THE UTILITY MODEL

[0003] The utility model wants to solve the technical problem, proposes a kind of acidic tail gas absorption treatment device, reduce equipment investment, it is safe and convenient to operate, can be continuously operated.

[0004] The acidic tail gas absorption treatment device, including circulating tank, alkali liquor is contained in circulating tank, partition is equipped in circulating tank, the bottom of partition is below alkali liquor level, partition separates left cavity and right cavity in circulating tank cavity, and alkali liquor level separates left cavity and right cavity into left gas cavity and left liquid cavity and right gas cavity and right liquid cavity respectively, left gas cavity and right gas cavity are not communicated, and left liquid cavity and right liquid cavity are communicated;Left gas inlet pipe, right gas inlet pipe, left absorption tower and right absorption tower are equipped in the upper portion of circulating tank, left gas inlet pipe is communicated with the bottom of left absorption tower by left gas cavity, and right gas inlet pipe is communicated with the bottom of right absorption tower by right gas cavity;Tail gas inlet pipe is connected to left gas inlet pipe, and tail gas inlet pipe is connected to right gas inlet pipe by communication pipe one;Left gas outlet pipe is equipped in the top of left absorption tower, and right gas outlet pipe is equipped in the top of right absorption tower, left gas outlet pipe is connected to right gas inlet pipe by gas guide pipe, left gas outlet pipe is connected to right gas outlet pipe by communication pipe two, and right gas outlet pipe is connected to exhaust pipe;Left spray pipe is equipped in left absorption tower, and right spray pipe is equipped in right absorption tower, and left spray pipe and right spray pipe are connected to left spray pipe and right spray pipe by left alkali liquor pipe and right alkali liquor pipe respectively at the bottom of circulating tank.

[0005] Preferably, the exhaust pipe is connected to a gas treatment device.

[0006] Preferably, the left alkali liquor pipe and the right alkali liquor pipe are respectively provided with a circulating pump.

[0007] Preferably, the left air inlet pipe is provided with a left air inlet valve, and the communication air pipe one is provided with a communication air inlet valve.

[0008] Preferably, the right air outlet pipe is provided with a right air outlet valve, and the communication air pipe two is provided with a communication air outlet valve.

[0009] Preferably, the air guide pipe is provided with an air guide valve.

[0010] Preferably, the left absorption tower and the right absorption tower are both made of glass fiber reinforced plastic, and the left absorption tower and the right absorption tower are both provided with PVC inner liners.

[0011] Compared with the prior art, the device has the advantages that: the air carrying capacity of the device is adjustable, and two absorption towers, i.e., a left absorption tower and a right absorption tower, are arranged instead of an absorption tower with a high design air volume, the left absorption tower and the right absorption tower share one circulating tank, the left air cavity and the right air cavity above the alkali liquid level in the circulating tank and separated by a partition plate are communicated with the bottom of the left absorption tower and the bottom of the right absorption tower respectively, the tail gas enters the left absorption tower and the right absorption tower from the left air cavity and the right air cavity respectively, the left liquid cavity below the left air cavity and the right liquid cavity below the right air cavity are communicated, the alkali liquid in the circulating tank is shared by the left absorption tower and the right absorption tower, in actual use, the left absorption tower and the right absorption tower can be selected to be used in series or in parallel according to the air volume of the tail gas to be treated, the equipment investment is reduced, the operation is safe and convenient, and when the left absorption tower or the right absorption tower is overhauled, the other absorption tower can be used alone, and the device can continuously operate without stopping production. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the device;

[0013] In the figure: 1, circulating tank; 2, partition plate; 3, left cavity; 4, right cavity; 5, left air cavity; 6, right air cavity; 7, left air inlet pipe; 8, right air inlet pipe; 9, left absorption tower; 10, right absorption tower; 11, tail gas inlet pipe; 12, communication air pipe one; 13, left air outlet pipe; 14, right air outlet pipe; 15, air guide pipe; 16, communication air pipe two; 17, air outlet pipe; 18, left spraying pipe; 19, right spraying pipe; 20, left alkali liquid pipe; 21, right alkali liquid pipe; 22, circulating pump; 23, left air inlet valve; 24, communication air inlet valve; 25, right air outlet valve; 26, air guide valve; 27, communication air outlet valve. DETAILED DESCRIPTION

[0014] The device will be described clearly and completely in combination with the drawings.

[0015] For example, Figure 1As shown, the acid tail gas absorption treatment device comprises a circulating tank 1, the circulating tank 1 is filled with lye, the circulating tank 1 is provided with a partition plate 2, the partition plate 2 is located below the lye surface, the lye surface is located above 60% of the height of the circulating tank 1, the partition plate 2 divides the inner cavity of the circulating tank 1 into a left cavity 3 and a right cavity 4, the lye surface divides the left cavity 3 and the right cavity 4 into a left gas cavity 5 and a left liquid cavity and a right gas cavity 6 and a right liquid cavity respectively, the left gas cavity 5 and the right gas cavity 6 are not communicated, and the left liquid cavity and the right liquid cavity are communicated; the upper part of the circulating tank 1 is provided with a left gas inlet pipe 7, a right gas inlet pipe 8, a left absorption tower 9 and a right absorption tower 10, the left absorption tower 9 and the right absorption tower 10 are both made of glass fiber reinforced plastic, the left absorption tower 9 and the right absorption tower 10 are provided with PVC lining, the left gas inlet pipe 7 is communicated with the bottom of the left absorption tower 9 through the left gas cavity 5, and the right gas inlet pipe 8 is communicated with the bottom of the right absorption tower 10 through the right gas cavity 6; the left gas inlet pipe 7 is connected with a tail gas inlet pipe 11, the tail gas inlet pipe 11 is connected with the right gas inlet pipe 8 through a communication pipe 1 2; the top of the left absorption tower 9 is provided with a left gas outlet pipe 13, the top of the right absorption tower 10 is provided with a right gas outlet pipe 14, the left gas outlet pipe 13 is connected with the right gas inlet pipe 8 through a gas guide pipe 15, the left gas outlet pipe 13 is connected with the right gas outlet pipe 14 through a communication pipe 2 16, and the right gas outlet pipe 14 is connected with an exhaust pipe 17; the left absorption tower 9 is provided with a left spray pipe 18, the right absorption tower 10 is provided with a right spray pipe 19, and the bottom of the circulating tank 1 is connected with the left spray pipe 18 and the right spray pipe 19 through a left lye pipe 20 and a right lye pipe 21 respectively.

[0016] The exhaust pipe 17 is connected with a gas treatment device.

[0017] The left lye pipe 20 and the right lye pipe 21 are respectively provided with a circulating pump 22.

[0018] The left gas inlet pipe 7 is provided with a left gas inlet valve 23, and the communication pipe 1 2 is provided with a communication gas inlet valve 24.

[0019] The right gas outlet pipe 14 is provided with a right gas outlet valve 25, and the communication pipe 2 16 is provided with a communication exhaust valve 27.

[0020] The gas guide pipe 15 is provided with a gas guide valve 26.

[0021] The working process is as follows:

[0022] When normal production only needs to deal with mechanically ventilated tail gas, open left air inlet valve 23, air guide valve 26, right air outlet valve 25, close communication air inlet valve 24 and communication air outlet valve 27, acidic tail gas enters left gas chamber 5 through tail gas inlet pipe 11 and left air inlet pipe 7, and then enters left absorption tower 9, and is sprayed by alkali liquor in left spray pipe 18 during the ascending process in left absorption tower 9, then the gas enters right absorption tower 10 through right air inlet pipe 8 and right gas chamber 6, and is sprayed by alkali liquor in right spray pipe 19 during the ascending process in right absorption tower 10, and the acidic substances in the gas are further absorbed, and then the gas enters the gas treatment device through exhaust pipe 17; the acidic tail gas can be realized to enter the subsequent treatment process after being absorbed by left absorption tower 9 and right absorption tower 10 in series;

[0023] When the accident ventilation is opened, the tail gas volume is doubled, at this time, open left air inlet valve 23, communication air inlet valve 24, right air outlet valve 25, communication air outlet valve 27, close air guide valve 26, acidic tail gas enters through tail gas inlet pipe 11, and then enters left absorption tower 9 through left air inlet pipe 7 and left gas chamber 5 in turn, enters right absorption tower 10 through communication air pipe one 12 in turn, and the tail gas in left absorption tower 9 and right absorption tower 10 enters left air outlet pipe 13 and right air outlet pipe 14 respectively after being sprayed by alkali liquor in left spray pipe 18 and right spray pipe 19 respectively, the gas in left air outlet pipe 13 enters right air outlet pipe 14 through communication air pipe two 16, and the gas in right air outlet pipe 14 enters the gas treatment device through exhaust pipe 17, which can realize that the acidic tail gas enters the subsequent treatment process after being absorbed by left absorption tower 9 and right absorption tower 10 in parallel, and meets the requirement of 2 times of wind volume in the accident state;

[0024] When left absorption tower 9 needs to be overhauled, at this time, open communication air inlet valve 24 and right air outlet valve 25, close left air inlet valve 23, air guide valve 26 and communication air outlet valve 27, stop the circulating pump 22 on left alkali liquor pipe 20, acidic tail gas enters right absorption tower 10 through tail gas inlet pipe 11, communication air pipe one 12, right air inlet pipe 8 and right gas chamber 6 in turn, and then enters exhaust pipe 17 through right air outlet pipe 14 after being sprayed by right spray pipe 19, which can realize that the acidic tail gas enters the subsequent treatment process after being absorbed by right absorption tower 10; when right absorption tower 10 needs to be overhauled, at this time, open left air inlet valve 23 and communication air outlet valve 27, close communication air inlet valve 24, right air outlet valve 25 and air guide valve 26, stop the circulating pump 22 on right alkali liquor pipe 21, acidic tail gas enters left absorption tower 9 through tail gas inlet pipe 11, left air inlet pipe 7 and left gas chamber 5 in turn, and then enters exhaust pipe 17 through left air outlet pipe 13 and communication air pipe two 16 after being sprayed by left spray pipe 18, which can realize that the acidic tail gas enters the subsequent treatment process after being absorbed by left absorption tower 9.

Claims

1. An acid tail gas absorption treatment apparatus, characterized by comprising: The application relates to a circulating tank (1) containing alkali solution, a partition (2) is arranged in the circulating tank (1), the bottom of the partition (2) is below the liquid level of the alkali solution, the partition (2) divides the inner cavity of the circulating tank (1) into a left cavity (3) and a right cavity (4), the liquid level of the alkali solution divides the left cavity (3) and the right cavity (4) into a left gas cavity (5) and a left liquid cavity and a right gas cavity (6) and a right liquid cavity respectively, the left gas cavity (5) and the right gas cavity (6) are not communicated, and the left liquid cavity and the right liquid cavity are communicated; a left gas inlet pipe (7), a right gas inlet pipe (8), a left absorption tower (9) and a right absorption tower (10) are arranged at the upper portion of the circulating tank (1), the left gas inlet pipe (7) is communicated with the bottom of the left absorption tower (9) through the left gas cavity (5), the right gas inlet pipe (8) is communicated with the bottom of the right absorption tower (10) through the right gas cavity (6); the left gas inlet pipe (7) is connected with a tail gas inlet pipe (11), the tail gas inlet pipe (11) is connected with the right gas inlet pipe (8) through a communicating pipe (12), a left gas outlet pipe (13) is arranged at the top of the left absorption tower (9), a right gas outlet pipe (14) is arranged at the top of the right absorption tower (10), the left gas outlet pipe (13) is connected with the right gas inlet pipe (8) through a gas guide pipe (15), the left gas outlet pipe (13) is connected with the right gas outlet pipe (14) through a communicating pipe (16), and the right gas outlet pipe (14) is connected with an exhaust pipe (17); a left spraying pipe (18) is arranged in the left absorption tower (9), a right spraying pipe (19) is arranged in the right absorption tower (10), and the bottom of the circulating tank (1) is connected with the left spraying pipe (18) and the right spraying pipe (19) through a left alkali solution pipe (20) and a right alkali solution pipe (21) respectively.

2. The acid tail gas absorption treatment apparatus according to claim 1, characterized by The exhaust pipe (17) is connected with a gas treatment device.

3. The acid tail gas absorption treatment apparatus according to claim 1, characterized by Circulating pumps (22) are arranged on the left alkali solution pipe (20) and the right alkali solution pipe (21) respectively.

4. The sour tail gas absorption treatment apparatus according to claim 1, characterized by A left gas inlet valve (23) is arranged on the left gas inlet pipe (7), and a communicating gas inlet valve (24) is arranged on the communicating pipe (12).

5. The acid tail gas absorption treatment apparatus according to claim 1, wherein A right gas outlet valve (25) is arranged on the right gas outlet pipe (14), and a communicating exhaust valve (27) is arranged on the communicating pipe (16).

6. The sour tail gas absorption treatment apparatus according to claim 1, characterized by A gas guide valve (26) is arranged on the gas guide pipe (15).

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