Waste gas acid mist purification structure

Abstract

The utility model discloses a waste gas acid mist purification structure which comprises a waste gas inlet pipeline, an ejector, a circulating liquid tank for storing circulating liquid, an acid mist absorption tower and a waste gas discharge pipeline which are communicated in sequence, the circulating liquid tank is communicated with an alkali supplementing pipeline capable of conveying liquid alkali, a water supplementing pipeline capable of conveying process water and a sewage discharging pipeline capable of discharging pollutants, the acid mist absorption tower comprises a spraying pipe and a filtering structure located below the spraying pipe, and the circulating liquid tank is further connected with a circulating pump used for conveying circulating liquid in the circulating liquid tank to the spraying pipe; the ejector comprises a shell communicated with the waste gas inlet pipeline and the circulating liquid tank, and an ejection nozzle capable of sucking the circulating liquid and pressurizing the circulating liquid to be vaporific, so that the vaporific circulating liquid ejected by the ejection nozzle is in full contact with the waste gas; the waste gas is primarily treated by the circulating liquid before entering the acid mist absorption tower, the waste gas purification effect is improved, and the circulating liquid is atomized by the ejector, so that the contact between the circulating liquid and the waste gas can be greatly improved, and the purification effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment devices, in particular to a waste gas acid mist purification structure. Background Art

[0002] Industrial waste gas refers to the polluted gases generated during fuel combustion and production processes within the factory area of ​​an enterprise. Some waste gases will cause direct harm after inhalation, while some waste gases will not have obvious reactions after a short period of inhalation but have an accumulation effect. When accumulated to a certain extent, it will cause more serious health problems. Therefore, both types of waste gas currently need to be treated through an acid mist waste gas purification system.

[0003] At present, waste gas treatment is generally carried out directly through an acid mist purification tower. For example, an acid mist waste gas purification tower disclosed in the invention patent with publication number CN112933930A directly passes the waste gas into the purification tower for treatment. However, when using this method for waste gas treatment, the waste gas is only filtered and absorbed by one packing layer, and the treatment effect is poor. Therefore, a purification structure with higher purification effect is currently needed. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a waste gas acid mist purification structure, which first undergoes preliminary treatment with mist circulating liquid before the waste gas enters the acid mist absorption tower, thereby improving the waste gas purification effect.

[0005] The utility model adopts a technical solution to solve the technical problem, which is a waste gas acid mist purification structure, comprising a waste gas inlet pipeline, an ejector, a circulating liquid tank for storing circulating liquid, an acid mist absorption tower and a waste gas discharge pipeline which are connected in sequence, the circulating liquid tank is connected with an alkali replenishment pipeline capable of conveying liquid alkali, a water replenishment pipeline capable of conveying process water and a sewage discharge pipeline capable of discharging pollutants, the acid mist absorption tower comprises a spray pipe and a filtering structure located below the spray pipe, the circulating liquid tank is also connected with a circulating pump for conveying the circulating liquid in the circulating liquid tank to the spray pipe, the ejector comprises a shell connected with the waste gas inlet pipeline and the circulating liquid tank and a spray nozzle capable of absorbing the circulating liquid and pressurizing the circulating liquid to a mist state so that the mist circulating liquid sprayed by the spray nozzle is in full contact with the waste gas.

[0006] As a further improvement of the utility model, the circulating liquid tank is provided with a liquid level meter, a pH meter and a salt concentration meter all connected to the control device, and the water supply pipeline, the alkali supply pipeline and the sewage pipeline are all provided with switch valves connected to the control device.

[0007] As a further improvement of the present invention, the liquid level meter includes a magnetic flap liquid level meter and a tuning fork liquid level meter. The magnetic flap liquid level meter has a first detection position and a second detection position located above the first detection position. When the first detection position is not triggered, the control device opens the switch valve of the water supply pipe. When the second detection position is triggered, the control device closes the switch valve of the water supply pipe. The tuning fork liquid level meter has an interlock detection position located above the second detection position. When the interlock detection position is triggered, the control device closes the switch valves of the water supply pipe and the alkali supply pipe.

[0008] As a further improvement of the utility model, a fan for driving the exhaust gas discharge and a differential pressure gauge for detecting the pressure difference are provided on the exhaust gas exhaust pipe. One end of the differential pressure gauge is connected before the fan and the other end is connected after the fan to detect whether the fan is blocked.

[0009] As a further improvement of the utility model, an alkali replenishment metering pump connected to the control device is arranged on the alkali replenishment pipeline.

[0010] As a further improvement of the utility model, pressure gauges are connected to the alkali replenishing pipeline, the circulation pump and the injection nozzle.

[0011] As a further improvement of the utility model, the sewage discharge pipe has a sewage discharge inlet flange, and the surface of the sewage discharge inlet flange is arranged to fit the lower surface of the circulating liquid tank.

[0012] As a further improvement of the utility model, an overflow pipe connected to the sewage pipe is also provided on the top of the circulating liquid tank.

[0013] As a further improvement of the utility model, both the exhaust gas inlet pipe and the exhaust gas outlet pipe are provided with a one-way valve.

[0014] As a further improvement of the utility model, the acid mist absorption tower and the ejector are both arranged on the top of the circulating liquid tank.

[0015] The beneficial effects of the utility model are at least: before the waste gas enters the acid mist absorption tower, it is first preliminarily treated with the circulating liquid to increase the waste gas purification effect, and the circulating liquid is atomized by the ejector, which can greatly increase the contact between the circulating liquid and the waste gas, thereby further improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0019] Reference Figure 1 and Figure 2 The utility model proposes a waste gas acid mist purification structure, comprising a waste gas inlet pipeline 1, an ejector 2, a circulating liquid tank 3 for storing circulating liquid, an acid mist absorption tower 4 and a waste gas discharge pipeline 5 which are connected in sequence. The circulating liquid tank 3 is connected with an alkali replenishment pipeline 6 for conveying liquid alkali, a water replenishment pipeline 7 for conveying process water and a sewage discharge pipeline 8 for discharging pollutants. The acid mist absorption tower 4 includes a spray pipe 41 and a filtering structure 42 located under the spray pipe 41. The circulating liquid tank 3 is also connected with a filter structure 42 for discharging circulating liquid in the circulating liquid tank 3. The circulating liquid is transported to the circulating pump 43 of the spray pipe 41, and the ejector 2 includes a shell 21 connected to the exhaust gas inlet pipeline 1 and the circulating liquid tank 3, and an ejector nozzle 22 capable of absorbing the circulating liquid and pressurizing the circulating liquid into a mist so that the mist circulating liquid ejected from the ejector nozzle 22 can fully contact with the exhaust gas; before the exhaust gas enters the acid mist absorption tower, it is first preliminarily treated with the circulating liquid to increase the exhaust gas purification effect, and the circulating liquid is atomized by the ejector, which can greatly increase the contact between the circulating liquid and the exhaust gas, thereby further improving the purification effect.

[0020] Reference Figure 1 and Figure 2 The circulating liquid tank 3 is provided with a liquid level meter 31, a pH meter 32 and a salt concentration meter 33 which are all connected to the control device, and the water supply pipe 7, the alkali supply pipe 6 and the sewage pipe 8 are all provided with a switch valve 11 which is connected to the control device; the liquid level meter 31 checks the height of the liquid, so as to judge whether it is necessary to add water or stop adding water or draining water; when the pH meter 32 detects that the pH value of the circulating liquid is lower than the preset value, alkali is supplemented through the alkali supply pipe 6; the salt concentration meter 33 detects the salt content of the circulating liquid, and when it exceeds a certain value, the switch valve 11 of the sewage pipe 8 is started to discharge sewage.

[0021] Reference Figure 2 It can be seen that the liquid level meter 31 includes a magnetic flap liquid level meter 311 and a tuning fork liquid level meter 312. The magnetic flap liquid level meter 311 has a first detection position 3111 and a second detection position 3112 located above the first detection position 3111. When the first detection position 3111 is not triggered, the control device opens the switch valve 11 of the water supply pipe 7. When the second detection position 3112 is triggered, the control device closes the switch valve 11 of the water supply pipe 7. The tuning fork liquid level meter 312 has an interlock detection position 3121 located above the second detection position 3112. When the interlock detection position 3121 is triggered, the control device closes the switch valves 11 of the water supply pipe 7 and the alkali supply pipe 6.

[0022] Reference Figure 1 The exhaust gas exhaust pipe 5 is provided with a fan 51 for driving the exhaust gas to be discharged and a differential pressure gauge 52 for detecting the pressure difference. One end of the differential pressure gauge 52 is connected before the fan 51 and the other end is connected after the fan 51 to detect whether the fan 51 is blocked.

[0023] Reference Figure 1 The alkali replenishing pipeline 6 is provided with an alkali replenishing metering pump 61 connected to the control device.

[0024] Reference Figure 1 The alkali replenishment pipeline 6, the circulation pump 43 and the injection nozzle 22 are all connected with a pressure gauge 12. When it is detected that the pressure value of the current pipeline reaches a certain value, an alarm is triggered to prompt an abnormality.

[0025] Reference Figure 1 and Figure 2 The sewage pipe 8 has a sewage inlet flange 81, and the surface of the sewage inlet flange 81 is arranged to fit the lower surface of the circulating liquid tank 3; the sewage inlet flange 81 is close to the lower surface of the circulating liquid tank 3, so that the pollutants in the circulating liquid tank 3 can be discharged as much as possible, and the circulating liquid can be prevented from being discharged together.

[0026] Reference Figure 1 and Figure 2 The top of the circulating liquid tank 3 is also provided with an overflow pipe 82 connected to the sewage pipe 8; when the water supply pipe 7 and the alkali supply pipe 6 have abnormalities and the water supply or alkali supply is not stopped in time, the circulating liquid in the circulating liquid tank 3 can directly overflow through the overflow pipe 82, avoiding the overflow of the circulating liquid and causing pollutants to enter the acid mist absorption tower 4.

[0027] Reference Figure 1 The exhaust gas inlet pipe 1 and the exhaust gas outlet pipe 5 are both provided with a one-way valve 13.

[0028] Reference Figure 2 The acid mist absorption tower 4 and the ejector 2 are both arranged on the top of the circulating liquid tank 3; when the exhaust gas is ejected from the ejector 2, it needs to pass through the circulating liquid tank 3 before entering the acid mist absorption tower 4, thereby increasing the contact time and improving the purification effect.

Claims

1. A waste gas acid mist purification structure, characterized in that: The invention comprises a waste gas inlet pipeline (1), an ejector (2), a circulating liquid tank (3) for storing circulating liquid, an acid mist absorption tower (4) and a waste gas discharge pipeline (5) which are connected in sequence. The circulating liquid tank (3) is connected with an alkali replenishment pipeline (6) capable of conveying liquid alkali, a water replenishment pipeline (7) capable of conveying process water and a sewage discharge pipeline (8) capable of discharging pollutants. The acid mist absorption tower (4) comprises a spray pipe (41) and a filtering structure (42) located below the spray pipe (41). The circulating liquid tank (3) is also connected with a circulating pump (43) for conveying circulating liquid in the circulating liquid tank (3) to the spray pipe (41). The ejector (2) comprises a housing (21) connecting the waste gas inlet pipeline (1) and the circulating liquid tank (3) and an ejector nozzle (22) capable of absorbing circulating liquid and pressurizing the circulating liquid into a mist so that the mist circulating liquid ejected by the ejector nozzle (22) is in full contact with the waste gas.

2. The waste gas acid mist purification structure according to claim 1, characterized in that: The circulating liquid tank (3) is provided with a liquid level meter (31), a pH meter (32) and a salt concentration meter (33) all connected to the control device, and the water supply pipeline (7), the alkali supply pipeline (6) and the sewage discharge pipeline (8) are all provided with a switch valve (11) connected to the control device.

3. The waste gas acid mist purification structure according to claim 2, characterized in that: The liquid level meter (31) comprises a magnetic flap liquid level meter (311) and a tuning fork liquid level meter (312); the magnetic flap liquid level meter (311) has a first detection position (3111) and a second detection position (3112) located above the first detection position (3111); when the first detection position (3111) is not triggered, the control device opens the switch valve (11) of the water supply pipeline (7); when the second detection position (3112) is triggered, the control device closes the switch valve (11) of the water supply pipeline (7); the tuning fork liquid level meter (312) has an interlock detection position (3121) located above the second detection position (3112); when the interlock detection position (3121) is triggered, the control device closes the switch valves (11) of the water supply pipeline (7) and the alkali supply pipeline (6).

4. The waste gas acid mist purification structure according to claim 1, characterized in that: The exhaust gas discharge pipe (5) is provided with a fan (51) for driving the exhaust gas to be discharged and a differential pressure gauge (52) for detecting the pressure difference. One end of the differential pressure gauge (52) is connected before the fan (51) and the other end is connected after the fan (51) to detect whether the fan (51) is blocked.

5. The waste gas acid mist purification structure according to claim 1, characterized in that: The alkali replenishment pipeline (6) is provided with an alkali replenishment metering pump (61) connected to the control device.

6. The waste gas acid mist purification structure according to claim 1, characterized in that: The alkali replenishing pipeline (6), the circulation pump (43) and the injection nozzle (22) are all connected with a pressure gauge (12).

7. The waste gas acid mist purification structure according to claim 1, characterized in that: The sewage discharge pipe (8) has a sewage discharge inlet flange (81), and the surface of the sewage discharge inlet flange (81) is arranged to fit the lower surface of the circulating liquid tank (3).

8. The waste gas acid mist purification structure according to claim 1, characterized in that: The top of the circulating liquid tank (3) is also provided with an overflow pipe (82) which is in communication with the sewage discharge pipe (8).

9. The waste gas acid mist purification structure according to claim 1, characterized in that: The waste gas inlet pipe (1) and the waste gas outlet pipe (5) are both provided with a one-way valve (13).

10. The waste gas acid mist purification structure according to claim 1, characterized in that: The acid mist absorption tower (4) and the ejector (2) are both arranged on the top of the circulating liquid tank (3).

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