Gas-liquid separation device capable of realizing tail gas recovery

Abstract

The utility model discloses a gas-liquid separation device capable of realizing tail gas recovery, and relates to the technical field of tail gas recovery, the gas-liquid separation device comprises a separation tank and a tail gas filtering assembly, the inner side of the separation tank is fixedly provided with a partition plate, and the partition plate is used for dividing the separation tank into a separation spraying chamber and an exhaust chamber; the tail gas filtering assembly is used for realizing hydrochloric acid separation operation of hydrochloric acid-containing tail gas; a liquid discharging assembly extending into the spraying chamber is further arranged on the other side of the separating tank, and the liquid discharging assembly is used for discharging the separated hydrochloric acid liquid and circularly spraying the hydrochloric acid liquid. By arranging the separating tank and the tail gas filtering assembly, separation of hydrochloric acid-containing condensed liquid in tail gas can be achieved, the alkali consumption of the alkali spraying tower is reduced, the salt water amount of sewage treatment is reduced, meanwhile, the hydrochloric acid-containing condensed liquid is circularly sprayed through the liquid preparing assembly, the water consumption of sewage treatment is reduced, and the water quality is improved. And the concentration of the hydrochloric acid-containing condensed liquid can be further improved, so that subsequent recycling is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas recovery technical field, specifically a kind of gas-liquid separation device capable of realizing tail gas recovery. BACKGROUND

[0002] Spray tower exists as a kind of treatment equipment of environmental protection waste gas treatment, and is divided into circulating water spray tower, lye spray tower, acid liquid spray tower (alias: pickling tower) according to working principle, and its working principle is as follows:

[0003] Dusty waste gas or oil-containing waste gas is sprayed by liquid medium in suitable position (according to design) inside tower body, some are lye, some are sulfuric acid solution (such as: waste gas contains acid, then select lye spray to neutralize acidity, if waste gas contains alkali, then select sulfuric acid solution to absorb), when waste gas enters from the bottom of tower body, it contacts with the spray medium sprayed by spray tower, after contacting, waste gas or oil stain is wrapped by water bead, water bead wrapping pollutant collides again, surface area increases and gravity increases, and water drop wrapping pollutant under the condition of increased gravity falls into the bottom of spray tower under the influence of gravity, heavier pollutant sinks into the bottom of tower body, and lighter pollutant floats on the surface of circulating water body.

[0004] In actual production process, acidic substances in some hydrochloric acid gas tail gas can be recycled as acidic raw materials, and the acidic substances are directly transported to spray tower for neutralization with lye, which not only leads to large consumption of lye medium, but also leads to waste of acidic substances, which is not conducive to full use of resources, based on this, in order to realize the recycling of acidic substances in hydrochloric acid gas tail gas, a kind of gas-liquid separation device capable of realizing tail gas recovery is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at: in order to realize the recycling of acidic substances in hydrochloric acid gas tail gas, provide a kind of gas-liquid separation device capable of realizing tail gas recovery.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of gas-liquid separation device capable of realizing tail gas recovery, including separation tank, the inner side of the separation tank is fixed with baffle, the baffle is used to separate into separation spray chamber, exhaust chamber, the top of the baffle is equipped with vent hole, the vent hole is used to realize the space conduction of spray chamber and exhaust chamber;The top and one side of the separation tank are provided with tail gas filtering assembly extending to the inside of spray chamber, exhaust chamber, and the tail gas filtering assembly is used to realize the hydrochloric acid separation operation of hydrochloric acid-containing tail gas;The other side of the separation tank is also provided with liquid discharge assembly extending to the inside of spray chamber, and the liquid discharge assembly is used to realize the discharge and circulating spray operation of separated hydrochloric acid liquid.

[0007] As a further scheme of the utility model: the tail gas filter assembly includes air inlet, lower conveying pipe, water inlet pipe, first annular spray pipe, L-shaped air outlet pipe, the air inlet, water inlet pipe are fixed in the spray chamber top, the lower conveying pipe is distributed in the spray chamber inside and is fixedly connected with the spray chamber inner wall top, and the air inlet penetrates the separation tank and is connected with the lower conveying pipe conduction, the first annausal spray pipe is distributed in the spray chamber inside and is sleeved in the lower conveying pipe outside, the water inlet pipe bottom end penetrates the separation tank to the spray chamber inside and is connected with the first annausal spray pipe conduction, the tail gas is transported to the spray chamber inside through the air inlet, lower conveying pipe, and the spray water realizes annular spray and full contact with the tail gas through the water inlet pipe, first annausal spray pipe, for realizing the shower interception of the hydrochloric acid substance in the hydrochloric acid tail gas, the L-shaped air outlet pipe is fixed in the separation tank outer wall one side and extends and penetrates to the exhaust chamber inside, and the tail gas that is filtered through spray is discharged through the passage that is formed by the vent hole, exhaust chamber, L-shaped air outlet pipe.

[0008] As a further scheme of the utility model: the liquid discharge assembly includes drain pipe, circulating pump, tee pipe, drain valve, circulating pipe, second annular spray pipe, the drain pipe is fixed in the separation tank outer wall and is away from the L-shaped air outlet pipe one side and is connected with the spray chamber inner wall bottom conduction, the drain pipe is connected with the input end of circulating pump conduction, one end of tee pipe is connected with the output end of circulating pump conduction, and the drain valve and circulating pipe are connected to the other two end heads of tee pipe, the second annular spray pipe is distributed in the spray chamber inside and is sleeved in the lower conveying pipe inside, and the circulating pipe extends and penetrates to the spray chamber inside and is connected with the second annular spray pipe conduction, the hydrochloric acid liquid is discharged through the drain pipe, circulating pump, tee pipe, drain valve, and the circulating spray operation of hydrochloric acid liquid is realized through the drain pipe, circulating pump, tee pipe, circulating pipe, second annular spray pipe.

[0009] As a further scheme of the utility model: the bottom of lower conveying pipe is tapered and shrinks, the bottom of first annausal spray pipe and second annausal spray pipe is provided with a plurality of annular distribution and is towards the lower conveying pipe bottom end position inclined spray head, and the second annausal spray pipe is distributed below the first annausal spray pipe.

[0010] As a further scheme of the utility model: the bottom end horizontal height of lower conveying pipe and L-shaped air outlet pipe is lower than the horizontal height of vent hole.

[0011] As a further scheme of the utility model: one end of separation tank outside is also installed with liquid level meter that is connected with the spray chamber inner cavity conduction, and the outer wall side of separation tank is also installed with overflow port that is connected with the spray chamber inner cavity conduction, the horizontal height of overflow port is higher than the upper through hole horizontal height of liquid level meter, and is lower than the bottom horizontal height of lower conveying pipe.

[0012] As a further scheme of the utility model: the first blowdown, the second blowdown are further fixed at the position close to the bottom of the outer part of the separation tank, and the first blowdown, the second blowdown are respectively communicated with the spraying chamber and the inner cavity bottom of the exhaust chamber.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The separation tank and the tail gas filtering assembly are arranged to separate the hydrochloric acid condensate liquid in the tail gas, reduce the alkali consumption of the alkali spraying tower, reduce the salt water quantity of sewage treatment, and through the circulating spraying operation of the hydrochloric acid condensate liquid by the liquid preparation assembly, the water consumption of sewage treatment is reduced, and the concentration of the hydrochloric acid condensate liquid is further improved, thereby facilitating subsequent recycling and use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of the utility model;

[0016] Fig. 2 It is a separation tank internal structure sectional view of the utility model;

[0017] Fig. 3 It is a separation tank and lower delivery pipe structure sectional view of the utility model.

[0018] In the drawing: 1, separation tank; 101, spraying chamber; 102, exhaust chamber; 2, partition; 3, vent hole; 4, tail gas filtering assembly; 401, air inlet; 402, lower delivery pipe; 403, water inlet pipe; 404, first annular spraying pipe; 405, L-shaped air outlet pipe; 5, liquid discharge assembly; 501, liquid discharge pipe; 502, circulating pump; 503, tee; 504, liquid discharge valve; 505, circulating pipe; 506, second annular spraying pipe; 507, liquid level meter; 508, overflow; 6, first blowdown; 7, second blowdown. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Please refer to Figs. 1-3The utility model embodiment, a kind of gas-liquid separation device capable of realizing tail gas recovery, including separation tank 1, the inside of separation tank 1 is fixed with baffle 2, baffle 2 is used to separate into separation spray chamber 101, exhaust chamber 102 with separation tank 1, the top of baffle 2 is equipped with vent 3, vent 3 is used to realize the space conduction of spray chamber 101 and exhaust chamber 102;The top of separation tank 1 is provided with tail gas filter assembly 4 extending to spray chamber 101, exhaust chamber 102 inside in one side, tail gas filter assembly 4 is used to realize the hydrochloric acid separation operation of hydrochloric acid containing tail gas;Another side of separation tank 1 is also provided with liquid discharge component 5 extending to spray chamber 101 inside, and liquid discharge component 5 is used to realize the separated hydrochloric acid liquid discharge and circulation spray operation.

[0021] Tail gas filter assembly 4 includes air inlet 401, lower delivery pipe 402, water inlet pipe 403, first annular spray pipe 404, L-shaped air outlet pipe 405;Air inlet 401, water inlet pipe 403 are fixed to the top of spray chamber 101, lower delivery pipe 402 is distributed to the inside of spray chamber 101 and is fixedly connected with the top of inner wall of spray chamber 101, and air inlet 401 penetrates separation tank 1 and is connected with lower delivery pipe 402 and is conducted through;First annular spray pipe 404 is distributed to the inside of spray chamber 101 and is sleeved to the outside of lower delivery pipe 402, and the bottom end of water inlet pipe 403 penetrates separation tank 1 to the inside of spray chamber 101 and is connected with first annular spray pipe 404 and is conducted through;Tail gas is transported to the inside of spray chamber 101 by air inlet 401, lower delivery pipe 402, and spray water is realized annular spray and fully contacts with tail gas by water inlet pipe 403, first annular spray pipe 404, for realizing the flushing interception of hydrochloric acid material in hydrochloric acid containing tail gas;L-shaped air outlet pipe 405 is fixed to the outside wall of separation tank 1 and extends and penetrates to the inside of exhaust chamber 102, and the tail gas filtered by spray is discharged through the passage of vent 3, exhaust chamber 102, L-shaped air outlet pipe 405.

[0022] The liquid drainage assembly 5 comprises a liquid drainage pipe 501, a circulating pump 502, a three-way pipe 503, a liquid drainage valve 504, a circulating pipe 505, and a second annular spray pipe 506. The liquid drainage pipe 501 is fixed to the outer wall of the separation tank 1 away from the L-shaped air outlet pipe 405 and is in communication with the bottom of the inner wall of the spray chamber 101. The liquid drainage pipe 501 is connected to the input end of the circulating pump 502. One end of the three-way pipe 503 is connected to the output end of the circulating pump 502. The liquid drainage valve 504 and the circulating pipe 505 are respectively connected to the other two ends of the three-way pipe 503. The second annular spray pipe 506 is distributed inside the spray chamber 101 and is sleeved inside the lower conveying pipe 402. The circulating pipe 505 extends through the spray chamber 101 and is in communication with the second annular spray pipe 506. The liquid drainage pipe 501, the circulating pump 502, the three-way pipe 503, and the liquid drainage valve 504 are used to drain the hydrochloric acid liquid. The liquid drainage pipe 501, the circulating pump 502, the three-way pipe 503, the circulating pipe 505, and the second annular spray pipe 506 are used to realize the circulating spray operation of the hydrochloric acid liquid.

[0023] The bottom of the lower conveying pipe 402 is a tapered contraction opening. The first annular spray pipe 404 and the second annular spray pipe 506 are provided with a plurality of inclined nozzles which are annularly distributed and face the bottom end of the lower conveying pipe 402. The second annular spray pipe 506 is distributed below the first annular spray pipe 404.

[0024] In this embodiment, it should be noted that the gas-liquid separation device is located between the alkali liquid spray tower and the reaction equipment. The gas inlet 401 is connected in communication with the tail gas outlet of the reaction equipment. The L-shaped air outlet pipe 405 is connected in communication with the gas inlet of the alkali liquid spray tower. The liquid drainage valve 504 is in communication with the hydrochloric acid liquid collection tank. The water inlet pipe 4033 is connected in communication with the external water tank through a water pump.

[0025] The operation principle of the separation tank is as follows:

[0026] The tail gas containing hydrochloric acid gas from the reaction equipment enters the spray chamber 101 through the gas inlet 401 and the lower conveying pipe 402. The tapered contraction opening of the lower conveying pipe 402 can accelerate the flow and diffusion of the tail gas when it enters the spray chamber 101. At the same time, the water spray is formed by spraying water through the water inlet pipe 403, the first annular spray pipe 404, and the inclined nozzles through the starting of the external water pump. The tail gas containing hydrochloric acid gas enters the spray chamber 101 and floats upward. In this process, the water spray contacts the tail gas containing hydrochloric acid gas, so that the hydrochloric acid substance in the tail gas containing hydrochloric acid gas is combined with the water spray and collected at the bottom of the spray chamber 101, thereby achieving the effect of separating the hydrochloric acid substance.

[0027] The tail gas filtered by the spray enters the discharge chamber 102 through the air hole 3 and flows downward along the trajectory of the discharge chamber 102. When it contacts the bottom end port of the L-shaped air outlet pipe 405, it enters the L-shaped air outlet pipe 405 and is conveyed to the alkali liquid spray tower through the L-shaped air outlet pipe 405.

[0028] In the above process, the liquid level of the hydrochloric acid-containing condensate liquid in the spraying chamber 101 is monitored by the liquid level meter 507. When the liquid level of the hydrochloric acid-containing condensate liquid in the spraying chamber 101 reaches a certain height, the water pump is stopped, and the circulating pump 502 is started at the same time. The circulating pump 502 pumps the hydrochloric acid-containing condensate liquid in the spraying chamber 101 and transports it to the second annular spraying pipe 506 through the three-way pipe 503 and the circulating pipe 505 (it should be noted that the drain valve 504 is closed at this time). The hydrochloric acid-containing condensate liquid is sprayed out through the inclined nozzles at the bottom of the second annular spraying pipe 506, thereby realizing the rinsing and filtering of the tail gas. In this way, the concentration of the hydrochloric acid-containing condensate liquid can be further increased. When the concentration of the hydrochloric acid-containing condensate liquid reaches 20% (it should be noted that an online hydrochloric acid concentration meter is installed in the separation tank to realize real-time monitoring of the concentration of the hydrochloric acid-containing condensate liquid), the drain valve 504 is opened, and the hydrochloric acid-containing condensate liquid is transported to the external hydrochloric acid liquid collection tank through the drain valve 504. In this process, the second annular spraying pipe 506 continues to spray. When the liquid level of the hydrochloric acid-containing condensate liquid in the separation tank 1 drops to a certain height, the circulating pump 502 is stopped and the drain valve 504 is closed, and the external water pump is started again. This reciprocating operation can be realized.

[0029] Through the cooperation of the above multiple parts, the separation of the hydrochloric acid-containing condensate liquid in the tail gas can be realized, the amount of alkali used in the alkali spraying tower can be reduced, and the amount of water used for sewage treatment can be reduced.

[0030] Please refer to Figs. 1-3 , the bottom end horizontal height of the lower delivery pipe 402 and the L-shaped air outlet pipe 405 is lower than the horizontal height of the ventilation hole 3.

[0031] The outer end of the separation tank 1 is also provided with a liquid level meter 507 in communication with the inner cavity of the spraying chamber 101, and the outer wall side of the separation tank 1 is also provided with an overflow port 508 in communication with the inner cavity of the spraying chamber 101. The horizontal height of the overflow port 508 is higher than the upper through hole horizontal height of the liquid level meter 507, and lower than the bottom horizontal height of the lower delivery pipe 402.

[0032] The first and second pollution outlets 6 and 7 are fixed to the outer end of the separation tank 1 near the bottom, and are in communication with the inner cavities of the spraying chamber 101 and the exhaust chamber 102, respectively.

[0033] In the embodiment: through the structure that the bottom end horizontal height of the lower conveying pipe 402, L type air outlet pipe 405 is lower than the horizontal height of the vent 3, can make the whole track of tail gas in the separation tank 1 is W type track, thereby guaranteeing the repeated contact filtering of tail gas and water mist, a small amount of water vapor along with the tail gas into the exhaust chamber 102, can be deposited to the bottom of the exhaust chamber 102 in the process of tail gas flowing to the bottom of the exhaust chamber 102, then can be discharged through the second blow-off port 7;

[0034] The first blow-off port 6 can be used for discharging the residual solution in the spraying chamber 101;

[0035] In addition, the overflow port 508 is mainly used for avoiding the situation that the lower conveying pipe 402 is blocked by the solution in the spraying chamber 101.

[0036] The above is only the preferred specific implementation mode of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art in the technical range disclosed by the present application, according to the technical scheme and the utility model concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A gas-liquid separation device capable of achieving tail gas recovery, comprising a separation tank (1), characterized in that, The inner side of the separation tank (1) is fixed with a partition plate (2), the partition plate (2) is used for separating the separation tank (1) into a separation spray chamber (101) and an exhaust chamber (102), a ventilation hole (3) is formed in the top of the partition plate (2), and the ventilation hole (3) is used for realizing the space communication of the spray chamber (101) and the exhaust chamber (102); the top and one side of the separation tank (1) are provided with a tail gas filtering assembly (4) extending into the inside of the spray chamber (101) and the exhaust chamber (102), the tail gas filtering assembly (4) is used for realizing the hydrochloric acid separation operation of the hydrochloric acid-containing tail gas; and the other side of the separation tank (1) is further provided with a liquid discharge assembly (5) extending into the inside of the spray chamber (101), and the liquid discharge assembly (5) is used for realizing the discharge and circulating spray operation of the separated hydrochloric acid liquid.

2. The gas-liquid separation device capable of recovering tail gas according to claim 1, characterized in that, The tail gas filtering assembly (4) comprises an air inlet (401), a lower conveying pipe (402), a water inlet pipe (403), a first annular spray pipe (404) and an L-shaped air outlet pipe (405); the air inlet (401) and the water inlet pipe (403) are fixed to the top of the spray chamber (101), the lower conveying pipe (402) is distributed on the inner side of the spray chamber (101) and is fixedly connected with the top of the inner wall of the spray chamber (101), and the air inlet (401) penetrates through the separation tank (1) and is connected and communicated with the lower conveying pipe (402); the first annular spray pipe (404) is distributed on the inner side of the spray chamber (101) and is sleeved on the outer side of the lower conveying pipe (402), the bottom end of the water inlet pipe (403) penetrates through the separation tank (1) to the inside of the spray chamber (101) and is connected and communicated with the first annular spray pipe (404); and the L-shaped air outlet pipe (405) is fixed to one side of the outer wall of the separation tank (1) and extends to penetrate into the inside of the exhaust chamber (102), and the tail gas filtered by spraying is discharged through the channel composed of the ventilation hole (3), the exhaust chamber (102) and the L-shaped air outlet pipe (405).

3. The gas-liquid separation device capable of recovering tail gas according to claim 2, characterized in that, The liquid discharge assembly (5) comprises a liquid discharge pipe (501), a circulating pump (502), a three-way pipe (503), a liquid discharge valve (504), a circulating pipe (505) and a second annular spray pipe (506); the liquid discharge pipe (501) is fixed to one side of the outer wall of the separation tank (1) away from the L-shaped air outlet pipe (405) and is communicated with the bottom of the inner wall of the spray chamber (101), the liquid discharge pipe (501) is connected and communicated with the input end of the circulating pump (502), one end of the three-way pipe (503) is connected and communicated with the output end of the circulating pump (502), and the liquid discharge valve (504) and the circulating pipe (505) are respectively connected to the other two ends of the three-way pipe (503); and the second annular spray pipe (506) is distributed on the inner side of the spray chamber (101) and is sleeved on the inner side of the lower conveying pipe (402), and the circulating pipe (505) extends to penetrate into the inside of the spray chamber (101) and is connected and communicated with the second annular spray pipe (506).

4. The gas-liquid separation device capable of recovering tail gas according to claim 3, characterized in that, The bottom of the lower conveying pipe (402) is a tapered shrinkage opening, the bottom of the first annular spray pipe (404) and the second annular spray pipe (506) is provided with a plurality of annularly distributed and inclined spray heads which are directed to the bottom end of the lower conveying pipe (402), and the second annular spray pipe (506) is distributed below the first annular spray pipe (404).

5. The gas-liquid separation device capable of recovering tail gas according to claim 2, characterized in that, The bottom end horizontal height of the lower conveying pipe (402) and the L-shaped air outlet pipe (405) is lower than the horizontal height of the ventilation hole (3).

6. The gas-liquid separation device capable of recovering tail gas according to claim 3, characterized in that, The outer end of the separation tank (1) is further provided with a liquid level meter (507) which is in communication with the inner cavity of the spray chamber (101), and the outer wall side of the separation tank (1) is further provided with an overflow port (508) which is in communication with the inner cavity of the spray chamber (101), the horizontal height of the overflow port (508) is higher than the upper through hole horizontal height of the liquid level meter (507) and lower than the bottom horizontal height of the lower conveying pipe (402).

7. The gas-liquid separation device capable of recovering tail gas according to claim 1, characterized in that, The outer end of the separation tank (1) is further provided with a first blowdown port (6) and a second blowdown port (7) which are close to the bottom, and the first blowdown port (6) and the second blowdown port (7) are respectively in communication with the inner cavity bottom of the spray chamber (101) and the exhaust chamber (102).

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