Full-automatic tail gas absorption treatment device

Abstract

The utility model relates to a full-automatic tail gas absorption treatment device which comprises a liquid preparation system, a liquid storage system and a tail gas spraying system, the liquid preparation system comprises a liquid preparation tank and a first liquid level meter, the liquid preparation tank is connected with a feeding pipeline, and the feeding pipeline is connected with an automatic feeding valve and a flow meter; the liquid storage system comprises a liquid storage tank connected to the outlet end of the liquid preparation tank through a first material transfer pipeline and a second liquid level meter, and the first material transfer pipeline is connected with a first material transfer valve; the tail gas spraying system comprises a tail gas absorption tower and a third liquid level meter which are connected to the outlet end of the liquid storage tank through a second material transferring pipeline, the second material transferring pipeline is connected with a second material transferring valve, a circulation loop is arranged between the spraying liquid inlet end and the spraying liquid outlet end of the tail gas absorption tower, and the circulation loop branches a waste liquid discharging pipeline; and the circulation loop is connected with a monitor for monitoring the effectiveness of the spraying liquid. The tail gas absorption and treatment device can realize the whole-process operation of tail gas treatment, avoids the influence of manual operation deviation on the tail gas absorption and treatment process, and improves the accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to the design fields requiring tail gas treatment such as chemical production, sewage treatment, and food production, and specifically is a fully automatic tail gas absorption treatment device. Background Art

[0002] During operations in the fields of chemical production, sewage treatment, food production, etc., odorous and harmful exhaust gases are easily generated. In order to meet the atmospheric emission standards, the treatment of the exhaust gas is an indispensable process in the production process. Conventional exhaust gas treatment equipment is mainly manually operated by operators, relying mainly on the operator's experience and human judgment on the timeliness of the operation. There are often problems such as inaccurate concentration of spray liquid preparation, incomplete transfer of spray liquid, inaccurate transfer of waste spray liquid, inaccurate transfer of fresh spray liquid, and inaccurate pH control of the exhaust gas absorption tower. All of the above problems will affect the exhaust gas treatment effect. Moreover, with the development of production, the reduction in the number of operators is also a general trend. Therefore, in the process of exhaust gas treatment, how to reduce dependence on operators and improve the accuracy of operations is an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to provide a fully automatic tail gas absorption treatment device, which can at least partially solve the technical problems mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fully automatic tail gas absorption treatment device, comprising a liquid preparation system, a liquid storage system and a tail gas spray system, the liquid preparation system comprising a liquid preparation tank and a first liquid level gauge connected thereto, the liquid preparation tank is connected to a feed pipeline, and the feed pipeline is connected to an automatic feed valve and a flow meter; the liquid storage system comprises a liquid storage tank connected to the outlet end of the liquid preparation tank through a first material transfer pipeline and a second liquid level gauge connected thereto, the first material transfer pipeline is connected to a first material transfer valve; the tail gas spray system comprises a tail gas absorption tower connected to the outlet end of the liquid storage tank through a second material transfer pipeline and a third liquid level gauge connected thereto, the second material transfer pipeline is connected to a second material transfer valve, a circulation loop is provided between the spray liquid inlet end and the spray liquid outlet end of the tail gas absorption tower, the circulation loop is branched with a waste liquid discharge pipeline, and the circulation loop is connected to a monitor for monitoring the effectiveness of the spray liquid.

[0005] In one embodiment, the feed pipeline is configured as at least two groups to meet the feed requirements of various types of materials, achieve the diversity of the spray liquid, and meet the treatment requirements of different tail gases.

[0006] In one embodiment, the liquid preparation system further includes an agitator connected to the liquid preparation tank.

[0007] In one embodiment, the liquid preparation system further includes a temperature control jacket disposed on the periphery of the liquid preparation tank and a temperature sensor connected to the liquid preparation tank.

[0008] In one embodiment, the tail gas absorption tower is filled with at least one layer of filler, and the spray liquid inlet corresponds to the filler.

[0009] In one embodiment, the second material transfer pipeline includes a front section pipeline close to the liquid storage tank and a rear section pipeline close to the tail gas absorption tower, and the second material transfer valve is connected to the front section pipeline.

[0010] In one embodiment, the circulation loop includes a circulation pipeline connected to the outlet end of the tail gas absorption tower spray liquid and a rear section pipeline of the second material transfer pipeline, and the circulation pipeline and the rear section pipeline are connected through a three-way pipeline.

[0011] In one embodiment, the monitor is connected to the rear section of the second material transfer pipeline.

[0012] In one embodiment, the waste liquid discharge pipeline branch is connected to the circulation pipeline.

[0013] In one embodiment, the monitor is a pH meter or a conductivity meter.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the fully automatic tail gas absorption treatment device provided by the utility model can realize the full process operation of tail gas treatment through the joint use of the quantitative automatic liquid dispensing tank, the liquid storage tank, the tail gas absorption tower and the automatic control system, and through the cooperation of the front-end liquid level meter, the valve and the flow meter, it can realize the accurate control of the concentration of the spray liquid preparation and the timely supply of the spray liquid, and through the cooperation of the back-end monitor, the liquid level meter and each pump body, it can realize the timely transfer of waste and fresh spray liquid, and the accurate control of the transfer amount of waste and fresh spray liquid. Through this device, the influence of manual operation deviation on the tail gas absorption treatment process can be effectively avoided, the accuracy can be improved, and the harm to the human body and the environment caused by improper tail gas treatment can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the fully automatic tail gas absorption treatment device in the embodiment of the utility model.

[0016] The meaning of each number in the figure is:

[0017] 1. Liquid dispensing system; 11. Liquid dispensing tank; 12. Feeding pipeline; 13. Automatic feeding valve; 14. Flow meter; 15. Agitator; 16. First liquid level meter; 17. Temperature control jacket; 18. Temperature control valve; 19. Temperature sensor;

[0018] 2. Liquid storage system; 21. Liquid storage tank; 22. First material transfer pipeline; 23. First material transfer valve; 24. Second liquid level gauge; 25. Second material transfer pipeline; 251. Front section pipeline; 252. Back section pipeline; 26. Second material transfer valve; 27. Material transfer pump;

[0019] 3. Exhaust gas spray system; 31. Exhaust gas absorption tower; 32. Filler; 33. Spray liquid inlet; 34. Spray liquid outlet; 35. Circulation pipeline; 36. Circulation pump; 37. Waste liquid discharge pipeline; 38. Discharge control valve; 39. Monitor; 40. Third liquid level meter. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] See also Figure 1 The present embodiment discloses a fully automatic exhaust gas absorption treatment device, including a liquid preparation system 1, a liquid storage system 2 and an exhaust gas spraying system 3. The liquid preparation system 1 is used to prepare exhaust gas absorption spraying liquid. The liquid storage system 2 is connected to the liquid preparation system 1, and is used to store the prepared spraying liquid. The liquid storage system 2 is configured to transport the spraying liquid to the exhaust gas spraying system 3. The exhaust gas spraying system 3 uses the spraying liquid to treat the exhaust gas. The device also includes an automatic control system for enabling the liquid preparation system 1, the liquid storage system 2 and the exhaust gas spraying system 3 to automatically operate according to a preset process.

[0023] Specifically, the liquid preparation system 1 includes a liquid preparation tank 11 for preparing the spray liquid, and the liquid preparation tank 11 is connected to a feed pipeline 12, and the feed pipeline 12 is connected to an automatic feed valve 13 and a flow meter 14, which can realize automatic feeding of materials, quantitative metering, and automatic closing function after feeding is completed. The liquid preparation tank 11 can select different materials or inner wall coatings according to the properties of the prepared solution. For example, stainless steel, fiberglass, glass lining, ceramic paint and other materials can be used, which can be selected according to actual needs.

[0024] Preferably, the feed pipeline 12 is set to at least two groups to meet the feed requirements of various types of materials, so that spray liquids of different types, weights and concentrations can be prepared to achieve the diversity of the spray liquid and meet the treatment requirements of different exhaust gases.

[0025] In this embodiment, the liquid preparation system 1 also includes an agitator 15 connected to the liquid preparation tank 11. The agitator 15 can promote uniform mixing of the spray liquid and avoid concentration differences. Exemplarily, the agitator 15 can adopt anchor stirring, frame stirring, paddle stirring and other structures. The structural setting of the agitator 15 in the tank belongs to the prior art, and its installation structure will not be described here.

[0026] The liquid dispensing system 1 also includes a first liquid level meter 16 connected to the liquid dispensing tank 11. The first liquid level meter 16 can monitor the liquid level in the liquid dispensing tank 11 in real time during operation to avoid material transfer residue. The first liquid level meter 16 and the following liquid level meters can be radar level meters, flap level meters, diaphragm level meters, tuning fork level switches, etc., which can be selected according to actual needs.

[0027] In a preferred embodiment, the liquid preparation system 1 also includes a temperature control jacket 17 arranged on the periphery of the liquid preparation tank 11 and a temperature sensor 19 connected to the liquid preparation tank 11. The temperature sensor 19 is used to monitor the temperature inside the tank. The temperature control jacket 17 is respectively connected to cold and hot circulating water pipelines, and the cold and hot circulating water pipelines are respectively connected to temperature control valves 18. According to the temperature inside the tank detected by the temperature sensor 19, the cold and hot circulating water pipelines are opened and closed to control the liquid preparation tank 11 to maintain it within a stable temperature range, so as to improve the preparation speed of the spray liquid.

[0028] The liquid storage system 2 includes a liquid storage tank 21 for storing the prepared spray liquid. Figure 1 As shown, the liquid storage tank 21 is connected to the bottom outlet end of the liquid preparation tank 11 through the first material transfer pipeline 22, and the first material transfer pipeline 22 is connected to a first material transfer valve 23 for controlling its on-off and flow rate, and the spray liquid is transferred from the liquid preparation tank 11 to the liquid storage tank 21 through the first material transfer pipeline 22. It can be understood that if the liquid preparation tank 11 and the liquid storage tank 21 do not have a liquid level difference, the first material transfer pipeline 22 needs to be equipped with a pumping structure to realize the automatic material transfer function.

[0029] In this embodiment, the liquid storage system 2 also includes a second liquid level gauge 24 connected to the liquid storage tank 21. The second liquid level gauge 24 can realize real-time monitoring of the liquid level of the liquid storage tank 21. The second liquid level gauge 24 is linked to the first material transfer valve 23 of the first material transfer pipeline 22. When the liquid level of the liquid storage tank 21 is lower than the set lower limit, the automatic control system triggers the liquid dispensing tank 11 to automatically dispense liquid, and automatically transfers the liquid into the liquid storage tank 21 for temporary storage; when the liquid level of the liquid storage tank 21 is higher than the set upper limit, the automatic control system triggers the liquid dispensing tank 11 to stop dispensing liquid, thereby ensuring that the liquid level in the liquid storage tank 21 is within a stable range.

[0030] The outlet end of the liquid storage tank 21 is connected to a second material transfer pipeline 25 , and the second material transfer pipeline 25 is connected to a second material transfer valve 26 for controlling its on-off and flow rate, and a material transfer pump 27 for pumping the spray liquid to the exhaust gas spray system 3 .

[0031] The tail gas spray system 3 includes a tail gas absorption tower 31, which is provided with a tail gas inlet and a tail gas outlet. The interior of the tail gas absorption tower 31 is filled with at least one layer of filler 32. Through the dispersion effect of the filler 32, the spray liquid can be evenly dispersed in the tail gas absorption tower 31, and the tail gas treatment effect is better. Different types of fillers 32 can be selected according to different types of spray liquids to prevent inappropriate spray liquids from corroding the fillers 32. In this embodiment, the tail gas absorption tower 31 is provided with a spray liquid inlet 33 corresponding to the filler 32 layer near the upper end, and the second material transfer pipeline 25 is connected to the spray liquid inlet 33 of the tail gas absorption tower 31. The fresh spray liquid in the liquid storage tank 21 enters the tail gas absorption tower 31 from the spray liquid inlet 33. The tail gas absorption tower 31 is provided with a spray liquid outlet 34 near the lower end, and the waste spray liquid is discharged from the tail gas absorption tower 31 from the spray liquid outlet 34.

[0032] It should be noted that, in order to make full use of the spray liquid, in this embodiment, a circulation loop is provided between the spray liquid inlet end 33 and the spray liquid outlet end 34 of the tail gas absorption tower 31, and the specific structure of the circulation loop is as follows: the spray liquid outlet end 34 of the tail gas absorption tower 31 is connected with a circulation pipeline 35, and correspondingly, the second material transfer pipeline 25 further includes a front section pipeline 251 close to the liquid storage tank 21 and a rear section pipeline 252 close to the tail gas absorption tower 31, and the two are connected by a three-way pipeline, and the second material transfer valve 26 is connected to the front section pipeline 251. The circulation pipeline 35 is connected to the three-way pipeline, and then, when the second material transfer valve 26 is closed, the circulation pipeline 35 is connected to the rear section pipeline 252 of the second material transfer pipeline 25, forming a complete circulation loop, and the circulation pipeline 35 is connected with a circulation pump 36 to realize automatic pumping of waste spray liquid.

[0033] The branch of the circulation pipeline 35 is connected to the waste liquid discharge pipeline 37, and the waste liquid discharge pipeline 37 is connected to the discharge control valve 38. Through the discharge control valve 38, the circulation pipeline 35 can be selectively connected to the waste liquid discharge pipeline 37 to discharge the waste liquid, or connected to the rear section pipeline 252 of the second material transfer pipeline 25 to realize the circulation of the spray liquid.

[0034] In this embodiment, a monitor 39 is connected to the circulation loop for real-time monitoring of the effectiveness of the spray liquid, and the waste spray liquid is automatically transferred out and the fresh spray liquid is automatically replenished according to the preset monitoring value in the automatic control system to ensure that the spray liquid meets the requirements and meets the tail gas treatment needs. Exemplarily, the monitor 39 can be a pH meter. During the spray liquid circulation spraying process, when the pH meter detects that the pH reaches the preset value, the external discharge control valve 38 is opened, and the waste spray liquid of the tail gas absorption tower 31 is discharged through the waste liquid external discharge pipeline 37. It should be noted that in order to ensure the continuity of the operation, a part of the waste spray liquid is simultaneously refluxed to the tail gas absorption tower 31 through the circulation loop, so that the spraying operation is uninterrupted. When the liquid level in the tower reaches the set liquid level lower limit, the external discharge control valve 38 is closed, and the second transfer valve 26 and the transfer pump 27 of the second transfer pipeline 25 are opened to transfer the fresh spray liquid into the tail gas absorption tower 31. In other embodiments not shown, the monitor 39 may also be a conductivity meter to monitor the conductivity of the spray liquid in real time.

[0035] It can be understood that the monitor 39 can be set in the circulation pipeline 35, and can also be set in the rear section pipeline 252 of the second material transfer pipeline 25, both of which can monitor the effectiveness of the circulating spray liquid. Preferably, the monitor 39 is set in the rear section pipeline 252 of the second material transfer pipeline 25. This setting can monitor the effectiveness of the circulating spray liquid and the effectiveness of the fresh spray liquid.

[0036] In this embodiment, the exhaust gas spray system 3 further includes a third liquid level meter 40 connected to the exhaust gas absorption tower 31. The third liquid level meter 40 is used to monitor the liquid level changes in the exhaust gas absorption tower 31, and cooperate with the external discharge control valve 38 to control the amount of waste spray liquid transferred out. It can also cooperate with the transfer pump 27 and the second control valve to control the amount of fresh spray liquid added, thereby avoiding excessive spray liquid from flooding the exhaust gas inlet pipe, and avoiding too little spray liquid causing the circulation pump 36 to run idle and burn.

[0037] In this embodiment, the automatic control system can perform logic program editing according to actual needs. By real-time monitoring and logical judgment of the amount of prepared material added, the liquid level, temperature, pH, etc. of each tank and absorption tower, it can realize automatic program control of each valve, pump body, agitator 15, etc., to meet the fully automatic liquid preparation and liquid conversion tail gas absorption treatment operation, and can also be manually operated to meet various manual and automatic requirements.

[0038] For ease of understanding, the use process of the fully automatic tail gas absorption treatment device provided in this embodiment is described as follows:

[0039] Start the automatic control system, and the fully automatic tail gas absorption treatment device will perform fully automatic liquid preparation, liquid transfer, and tail gas absorption treatment operations according to the set parameters and procedures, as follows:

[0040] The first transfer valve 23 is closed, the automatic feed valve 13 of one feed pipe is opened, and tap water is added to the quantitative liquid preparation tank 11. When the flow meter 14 detects the set weight, the automatic feed valve 13 is closed, and the agitator 15 is turned on at the same time. Then the automatic feed valve 13 on the other feed pipe is opened, and concentrated sulfuric acid is added. When the corresponding flow meter 14 detects the set weight, the automatic feed valve 13 is closed, and the feeding is completed. Then, stirring is started according to the stirring set time. After the agitator 15 is closed, the first transfer valve 23 on the first transfer pipeline 22 is opened, and the prepared dilute sulfuric acid in the liquid preparation tank 11 is transferred to the liquid storage tank 21 through the liquid level difference. At the same time, the temperature sensor 19 monitors the system temperature in real time during the whole process, and the temperature of the system is ensured to be within the process range through the control of the temperature control jacket 17. The second liquid level gauge 24 on the liquid storage tank 21 detects the liquid level in real time. When the liquid level is lower than the set liquid level lower limit, the liquid preparation and liquid transfer operation is continued. When the liquid level is higher than the set liquid level upper limit, the liquid preparation and liquid transfer operation is stopped.

[0041] The second transfer valve 26 and the transfer pump 27 on the second transfer pipeline 25 at the bottom of the liquid storage tank 21 are opened to transfer the spray liquid into the tail gas absorption tower 31. The third liquid level meter 40 connected to the tail gas absorption tower 31 detects the liquid level in real time. When the liquid level reaches the set upper limit, the transfer pump 27 stops, the second transfer valve 26 is closed, and the operation of transferring the spray liquid into the tail gas absorption tower 31 is completed.

[0042] When the liquid level of the tail gas absorption tower 31 is higher than the set lower limit of the liquid level, the circulation pump 36 is started and the tail gas treatment begins. The pH meter on the circulation loop of the tail gas absorption tower 31 monitors the pH of the spray liquid in real time. When the pH reaches the set upper limit of the pH, the external discharge control valve 38 on the waste liquid external discharge pipeline 37 is opened to automatically transfer the waste spray liquid in the tower. When the liquid level reaches the set lower limit of the liquid level, the external discharge control valve 38 is closed, and the waste spray liquid is transferred out. Then the second transfer valve 26 and the transfer pump 27 on the second transfer pipeline 25 are opened to transfer the fresh spray liquid into the tail gas absorption tower 31 again. The third liquid level meter 40 detects the liquid level in real time. When the liquid level reaches the set upper limit of the liquid level, the transfer pump 27 stops, the second transfer valve 26 is closed, and the operation of transferring the spray liquid into the tail gas absorption tower 31 is completed.

[0043] The fully automatic tail gas absorption treatment device provided in this embodiment can realize the full process operation of tail gas treatment through the joint use of the quantitative automatic liquid dispensing tank 11, the liquid storage tank 21, the tail gas absorption tower 31 and the automatic control system, and through the linkage of each liquid level meter and each valve, the pump body and the monitor 39, the flow meter 14, it can realize the accurate control of the concentration of the spray liquid preparation and the timely supply of the spray liquid at the front end, and realize the timely transfer of the waste spray liquid and the timely transfer of the fresh spray liquid at the back end, as well as the accurate control of the transfer amount of the waste and fresh spray liquid. This device can reduce the labor intensity of the operator, improve production efficiency, avoid the problems of inaccurate feeding, incomplete material transfer, unstable liquid level, unstable temperature, inaccurate pH control, etc. caused by manual operation that affect the tail gas absorption treatment, and avoid the harm caused by improper tail gas treatment to the human body and the environment.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A fully automatic tail gas absorption treatment device, characterized in that: include: A liquid dispensing system (1) comprises a liquid dispensing tank (11) and a first liquid level meter (16) connected thereto, wherein the liquid dispensing tank (11) is connected to a feed pipeline (12), and the feed pipeline (12) is connected to an automatic feed valve (13) and a flow meter (14); The liquid storage system (2) comprises a liquid storage tank (21) connected to the outlet end of the liquid dispensing tank (11) via a first material transfer pipeline (22) and a second liquid level meter (24) connected thereto, wherein the first material transfer pipeline (22) is connected to a first material transfer valve (23); The tail gas spraying system (3) comprises a tail gas absorption tower (31) connected to the outlet end of the liquid storage tank (21) via a second material transfer pipeline (25) and a third liquid level meter (40) connected thereto, the second material transfer pipeline (25) being connected to a second material transfer valve (26), a circulation loop being provided between the spray liquid inlet end (33) and the spray liquid outlet end (34) of the tail gas absorption tower (31), the circulation loop being branched with a waste liquid discharge pipeline (37), and the circulation loop being connected to a monitor (39) for monitoring the effectiveness of the spray liquid.

2. The fully automatic tail gas absorption treatment device according to claim 1 is characterized in that: The feed pipelines (12) are arranged in at least two groups.

3. The fully automatic tail gas absorption treatment device according to claim 1 is characterized in that: The liquid preparation system (1) further comprises a stirrer (15) connected to the liquid preparation tank (11).

4. The fully automatic tail gas absorption treatment device according to claim 1 is characterized in that: The liquid preparation system (1) further comprises a temperature control jacket (17) sleeved on the periphery of the liquid preparation tank (11) and a temperature sensor (19) connected to the liquid preparation tank (11).

5. The fully automatic tail gas absorption treatment device according to claim 1 is characterized in that: The tail gas absorption tower (31) is filled with at least one layer of filler (32), and the spray liquid inlet end (33) corresponds to the filler (32).

6. The fully automatic tail gas absorption treatment device according to claim 1 is characterized in that: The second material transfer pipeline (25) comprises a front section pipeline (251) close to the liquid storage tank (21) and a rear section pipeline (252) close to the tail gas absorption tower (31), and the second material transfer valve (26) is connected to the front section pipeline (251).

7. The fully automatic tail gas absorption treatment device according to claim 6 is characterized in that: The circulation loop comprises a circulation pipeline (35) connected to the spray liquid outlet end (34) of the tail gas absorption tower (31) and a rear section pipeline (252) of the second material transfer pipeline (25), and the circulation pipeline (35) and the rear section pipeline (252) are connected via a three-way pipeline.

8. The fully automatic tail gas absorption treatment device according to claim 7 is characterized in that: The monitor (39) is connected to the rear section pipeline (252) of the second material transfer pipeline (25).

9. The fully automatic tail gas absorption treatment device according to claim 7, characterized in that: The waste liquid discharge pipeline (37) is branched and connected to the circulation pipeline (35).

10. The fully automatic tail gas absorption treatment device according to claim 1, characterized in that: The monitor (39) is a pH meter or a conductivity meter.

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