Novel efficient acid mist absorber system and control method thereof

Abstract

The invention discloses a novel efficient acid mist absorber system and a control method thereof. The novel efficient acid mist absorber system comprises an acid storage tank, an acid mist absorber, a spraying pipe I, a spraying pipe II, an absorption liquid storage tank and a neutralization tank, two layers of spraying pipes I and two layers of spraying pipes II are sequentially arranged in the acid mist absorber at intervals from top to bottom, and plastic garland packing is respectively filled between the two spraying pipes I and between the spraying pipe I close to the lower side and the spraying pipe II close to the upper side in the acid mist absorber; pP (polypropylene) corrugated fillers are respectively filled between the two spraying pipes II and under the spraying pipe II close to the lower side in the spraying pipe I; the acid storage tank is communicated with the inner part, close to the bottom end, of the acid mist absorber through a gradually-expanding-gradually-shrinking pipeline, and acid mist is conveyed to the acid mist absorber to be subjected to quadruple spraying and filler absorption; a liquid outlet of the acid mist absorber is communicated with a liquid inlet of the absorption liquid storage tank, and a liquid outlet of the absorption liquid storage tank is communicated with a liquid inlet of the neutralization tank. According to the invention, the trapping efficiency of acid mist particles with different particle sizes is improved, and the environment-friendly emission requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of acid mist absorption, and in particular to a novel high-efficiency acid mist absorber system and a control method thereof. Background Art

[0002] Acid mist typically refers to a mist of acidic substances with a particle size of 0.1 to 10 μm and is highly corrosive. The emission of acid mist can cause acid mist and acidic gases to permeate the workplace air. Once released into the atmosphere, it can cause acid deposition in the atmosphere. This not only endangers the health of workers and residents living near the factory, corrodes factory equipment and precision instruments, and causes losses to production and livelihoods, but also adversely affects the survival of crops and other plants and animals, and can damage buildings, cultural relics, and other historical sites.

[0003] With growing environmental awareness and increasingly stringent environmental regulations, industrial production is facing increasingly stringent requirements for the emission control of pollutants such as acid mist. Companies need to take effective measures to reduce acid mist emissions to meet environmental standards and avoid environmental pollution and legal risks.

[0004] However, the existing acid mist absorbers generally have the following defects: 1) For high-concentration, high-flow acid mist working conditions, the existing acid mist absorbers are difficult to achieve the ideal purification effect, and the removal rate is not high enough; 2) The internal structure design of the existing acid mist absorber is unreasonable, and the gas-liquid contact method is not good, which will cause the gas to have a large resistance when passing through the absorber; 3) When treating acidic waste gas containing impurities or easy to crystallize, the fillers, nozzles and other parts of the existing acid mist absorber are prone to clogging, thereby affecting the absorption effect, and it is difficult to clean after scaling, which will reduce the service life of the equipment; 4) The existing acid mist absorber has poor adaptability to changes in working conditions. When the acid mist concentration and flow rate are changed, the absorber will not be able to meet the requirements of the equipment. When major changes occur, it is difficult to maintain a stable absorption efficiency, and it is necessary to frequently adjust the operating parameters or even carry out equipment modifications; 5) In order to ensure the absorption effect, the existing acid mist absorber often requires a large volume and height, which results in a large footprint and is not suitable for places with limited space; 6) If the absorption liquid after absorbing the acid mist is not handled properly, it may become a secondary pollution source, such as the absorption liquid discharge does not meet the standards or leaks during storage and treatment; 7) The degree of automation is insufficient, especially for enterprises with large storage and usage of hydrochloric acid, the amount of acid mist produced by hydrochloric acid water is also large, which will increase the amount of manual labor and labor costs.

[0005] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a new type of high-efficiency acid mist absorber system and its control method. The system adopts a design of alternating multi-stage spraying and packing layers, which can greatly improve the capture efficiency of acid mist particles of different particle sizes from the two aspects of physical contact and enhanced absorption. Especially under high-concentration and high-flow conditions, the purification efficiency of acid mist can be increased by 20% to 30%, effectively meeting environmental emission requirements.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: a novel high-efficiency acid mist absorber system of the present invention, the innovation of which is that it comprises an acid storage tank, a gradually expanding-converging pipe, an acid mist absorber, a spray pipe I, a plastic wreath filler, a spray pipe II, a PP corrugated filler, an absorption liquid storage tank and a neutralization tank; inside the acid mist absorber, two layers of spray pipe I and two layers of spray pipe II are sequentially spaced from top to bottom, and inside the acid mist absorber, two layers of spray pipe I and two layers of spray pipe II are respectively filled between the two spray pipes I and between the lower spray pipe I and the upper spray pipe II. A layer of plastic rosette filler is provided, and a layer of PP corrugated filler is respectively filled inside the space between the two spray pipes II and directly below the lower spray pipe II; the acid storage tank is sealed and connected to the bottom end of the interior of the acid mist absorber through a gradually expanding and gradually contracting pipe, and the acid mist is sent to the acid mist absorber for four-fold spraying and filler absorption; the liquid outlet of the acid mist absorber is connected to the liquid inlet of the absorption liquid storage tank through the drainage pipe I, and the liquid outlet of the absorption liquid storage tank is connected to the liquid inlet of the neutralization tank through the drainage pipe II.

[0008] Preferably, it also includes an inlet valve I, an inlet valve II and an inlet main valve; the inlet valve I and the inlet valve II are both pneumatic PPH diaphragm valves, and the inlet main valve is an acid- and alkali-resistant pneumatic PPH diaphragm regulating valve; all the spray pipes I of each layer are arranged horizontally and horizontally in parallel in the longitudinal direction, and a plurality of nozzles I are arranged vertically and spaced in sequence on the lower surface of each spray pipe I along its length. Each nozzle I is made of wear-resistant and corrosion-resistant ceramic or silicon carbide, and its aperture is 0.5-1 mm. Then, fine droplets are generated through nozzle I to enhance the capture of small-particle acid mist particles; one end of all the spray pipes I on the upper layer is gathered into one and then extends vertically upward from the upper surface of the acid mist absorber, and is sealed and connected to the industrial water source through the inlet valve I and the inlet main valve in sequence through the pipeline; one end of all the spray pipes I on the lower layer is gathered into one and then extends horizontally and vertically out of the right side of the acid mist absorber, and is sealed and connected to the pipeline located between the inlet valve I and the inlet main valve through the pipeline vertically upward through the inlet valve II.

[0009] Preferably, it also includes an inlet valve III and an inlet valve IV; the inlet valve III adopts a pneumatic PPH diaphragm valve, and the inlet valve IV adopts an acid- and alkali-resistant pneumatic PPH diaphragm regulating valve; all the spray pipes II of each layer are arranged horizontally and horizontally in parallel in sequence along the longitudinal direction, and a number of nozzles II are arranged vertically and spaced in sequence on the lower surface of each spray pipe II along its length direction, each of the nozzles II is made of wear-resistant and corrosion-resistant ceramic or silicon carbide material, and its pore size is 2-3mm, thereby ensuring the initial absorption of large-flow acid mist through nozzle II; one end of all the spray pipes II of the upper layer are gathered into one and then extended horizontally and vertically out of the right side of the acid mist absorber, and are vertically upward through the inlet valve III through the pipeline and are sealed and connected to the pipeline section between the acid mist absorber and the inlet valve II; one end of all the spray pipes II of the lower layer are gathered into one and then extended horizontally and vertically out of the right side of the acid mist absorber, and are vertically upward through the inlet valve IV through the pipeline and are sealed and connected to the pipeline section between the acid mist absorber and the inlet valve III.

[0010] Preferably, it also includes partitions; partitions matching the interior of the acid mist absorber are horizontally fixed relative to the position of each layer of plastic garland filler and each layer of PP corrugated filler, and each of the partitions supports the corresponding plastic garland filler or PP corrugated filler, and a number of small holes I are evenly spaced and vertically embedded on the upper surface of each partition; the two partitions on the upper side are located in the upper middle position of the interior of the acid mist absorber, and the two partitions on the lower side are located in the lower middle position of the interior of the acid mist absorber; each layer of the plastic garland filler adopts PP material φ25 plastic multi-faceted hollow balls, and is respectively filled in the interior of the acid mist absorber relative to the two partitions on the upper side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle I; each layer of the PP corrugated filler adopts pressure-resistant PP corrugated plates, and is respectively filled in the interior of the acid mist absorber relative to the two partitions on the lower side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle II.

[0011] Preferably, the gradually expanding and gradually converging pipeline includes an inlet pipe, a branch pipe and an outlet valve I; the liquid inlet of the acid mist absorber is arranged at the bottom end of its left side, and the acid storage tank is sealed and connected to the liquid inlet of the acid mist absorber through the inlet pipe, and an outlet valve I for controlling its on and off is also connected on the inlet pipe, and the outlet valve I is made of PPH material ball valve; one end of the inlet pipe extends horizontally and vertically to the right inner side surface of the interior of the acid mist absorber, and several branch pipes are horizontally and vertically connected at intervals on the front and back sides of the extended part along its length direction. The inner diameter of the inlet pipe is larger than the inner diameter of each of the branch pipes, and several small holes II are vertically embedded and penetrated in the upper surface of each of the branch pipes at intervals along its length direction, thereby forming a dendritic structure with a gradually expanding acid mist inlet and a gradually converging acid mist outlet, so that the acid mist in the acid storage tank flows out through the small hole II and undergoes four-fold spraying and filler absorption from bottom to top in the acid mist absorber.

[0012] Preferably, a swirl plate matching the acid mist absorber is horizontally provided between the lower layer of plastic garland filler and the upper spray pipe II inside the acid mist absorber. The swirl plate is made of acid-corrosion-resistant PP plate and is arranged in the middle position inside the acid mist absorber. The swirl plate causes the passing airflow to produce a rotational motion, thereby extending the residence time of the acid mist in the acid mist absorber and increasing the gas-liquid contact area.

[0013] Preferably, it also includes an acid mist concentration online monitor I, a check valve I, an exhaust pipe II, an exhaust valve II and an acid mist concentration online monitor II; the exhaust valve II adopts a PPH material ball valve, and the check valve I adopts PPH material; an acid mist concentration online monitor I is also connected on the inlet pipe near the outlet valve I, and the acid mist concentration value volatilized from the acid storage tank is monitored by the acid mist concentration online monitor I; the exhaust port of the acid mist absorber is located on the side of its upper surface away from the inlet valve I, and is connected to the outside world through the exhaust pipe II; the exhaust valve II and the acid mist concentration online monitor are also connected in sequence on the exhaust pipe II. The exhaust valve II is arranged on the side of the acid mist absorber, and the exhaust pipe II is controlled by the exhaust valve II, and the acid mist concentration online monitor II is used to monitor the absorption of acid mist by the acid mist absorber; one end of the check valve I is connected to the exhaust pipe II between the acid mist absorber and the exhaust valve II through a pipeline, and the other end is connected to the pipeline between the outlet valve I and the acid mist concentration online monitor I through a pipeline, and ensure that the direction of the check valve I is that the air flows to the inlet pipe, thereby ensuring that the positive pressure generated inside the acid mist absorber is discharged in time, and ensuring that the acid storage tank releases the acid smoothly.

[0014] Preferably, it also includes a U-shaped water seal, a bypass valve, a liquid level gauge I, an exhaust pipe I, an exhaust valve I, an outlet valve II, an acid-resistant pump, a check valve II and an inlet valve V; the liquid outlet of the acid mist absorber is arranged on its right side near its bottom end, and a U-shaped water seal is also provided on the drainage pipe I, the two open ends of the U-shaped water seal are arranged vertically downward, and are sealed and connected with the corresponding section of the drainage pipe I, and then the drainage pipe I is divided into left and right ends by the U-shaped water seal, and the U-shaped water seal is used to ensure that there is a certain liquid level of industrial water at the bottom of the acid mist absorber; the bypass valve is arranged just below the U-shaped water seal, and it adopts a pneumatic PP H diaphragm valve, one end of the bypass valve is sealed and connected to the drain pipe I located on the left through a pipeline, and the other end is sealed and connected to the corresponding drain pipe I located on the right through a pipeline, and then the industrial water at the bottom of the acid mist absorber is discharged by opening the bypass valve; a liquid level gauge I for monitoring the liquid level of the absorption liquid storage tank is also provided on the left side of the absorption liquid storage tank, and the exhaust port of the absorption liquid storage tank is provided on the right side of its upper surface and is connected to the outside world through the exhaust pipe I; an exhaust valve I is also connected to the exhaust pipe I, and the exhaust valve I adopts a PPH ball valve, and the exhaust pipe I is controlled by the exhaust valve I;

[0015] The liquid outlet of the absorption liquid storage tank is arranged on the right side near its bottom end, and the outlet valve II, acid-resistant pump, check valve II and inlet valve V are sequentially connected and connected on the discharge pipe II. The outlet valve II is arranged on the side close to the absorption liquid storage tank. The outlet valve II and the inlet valve V are both PPH ball valves, and the check valve II is made of PPH material. When the outlet valve II and the inlet valve V are opened, the acid in the absorption liquid storage tank is pumped into the neutralization tank by the acid-resistant pump for neutralization with the alkali solution.

[0016] Preferably, it also includes a liquid level meter II, a drain pipe III, a discharge valve, a discharge pump, an alkali adding pipe, an alkali adding valve, an exhaust pipe III, an exhaust valve III and a pH online monitor; a liquid level meter II for monitoring its liquid level is also provided on the left side of the neutralization tank, and a pH online monitor for monitoring its pH value is also provided on the right side; the alkali adding port of the neutralization tank is provided on the left side of its upper surface, and is sealed and connected to the alkali liquid source through the alkali adding pipe, and an alkali adding valve is also provided on the alkali adding pipe, the alkali adding valve adopts a pneumatic PPH diaphragm regulating valve, and the amount of alkali added to the neutralization tank is adjusted by the alkali adding valve; the neutralization tank The exhaust port is located on the right side of its upper surface and is connected to the outside world through the exhaust pipe III; the exhaust valve III is also connected to the exhaust pipe III, and the exhaust valve III adopts a PPH ball valve, and the exhaust pipe III is controlled by the exhaust valve III; the liquid outlet of the neutralization tank is located on the right side near its bottom end, and is connected to the outside world through the drainage pipe III; the drainage pipe III is also sequentially connected with a discharge valve and a discharge pump, the discharge valve is located on the side close to the neutralization tank, and adopts a pneumatic PPH diaphragm valve, and when the discharge valve is opened, the neutralized solution is discharged through the discharge pipe III by the discharge pump.

[0017] The novel control method of the high-efficiency acid mist absorber system of the present invention is innovative in that it comprises the following steps:

[0018] (1) Under normal operating conditions, outlet valve I, outlet valve II, inlet valve V, exhaust valve I, exhaust valve II and exhaust valve III are all in the fully open state;

[0019] (2) According to the concentration value monitored by the acid mist concentration online monitor I, three levels of low, medium and high are set, and then the opening of the inlet main valve and the inlet valve IV are set according to the three levels, and according to the three levels, all or part of the inlet valve I, inlet valve II, inlet valve III and inlet valve IV are selected for use;

[0020] (3) The acid mist in the acid storage tank flows out through the outlet valve I, the inlet pipe, the branch pipe and the small hole II in sequence, and is initially absorbed by the industrial water at the bottom of the acid mist absorber, and then sprayed and absorbed by the filler from bottom to top in the acid mist absorber; specifically:

[0021] (3.1) Low level: Set the opening of the inlet main valve to 30% and fully open the inlet valve I;

[0022] (3.2) Moderate level: Set the opening of the inlet main valve to 60%, and fully open inlet valves I and II;

[0023] (3.3) High level: Set the opening of the inlet main valve to 100%, and fully open inlet valves I, II, and III;

[0024] (3.4) Inlet valve IV is used as an auxiliary supplement, and its opening size is determined according to the concentration value monitored by the acid mist concentration online monitor II until the concentration value monitored by the acid mist concentration online monitor II reaches 0;

[0025] (4) The acid mist is discharged through the exhaust pipe II after being sprayed and absorbed by the filler, and the acid liquid is collected into the absorption liquid storage tank through the U-shaped water seal and the drain pipe I for storage; when the acid liquid level in the absorption liquid storage tank reaches 2 / 3 to 3 / 4, the acid-resistant pump is started to pump the acid liquid in the absorption liquid storage tank into the neutralization tank; at this time, the opening size of the alkali adding valve is adjusted according to the monitoring value of the pH online monitor, and when the pH value of the solution in the neutralization tank is adjusted to 6 to 9 by adding alkali liquid, the alkali adding valve is closed, and the discharge valve is started after 20 seconds, and the neutralized solution is discharged through the discharge pump;

[0026] (5) When the bottom of the acid mist absorber needs to be cleaned, open the bypass valve. At this time, the impurities and sediments accumulated at the bottom of the acid mist absorber can be discharged through the bypass valve.

[0027] Beneficial effects of the present invention:

[0028] (1) The present invention adopts a design of alternating multi-stage spraying and packing layers, which can significantly improve the capture efficiency of acid mist particles of different particle sizes from the two aspects of physical contact and enhanced absorption. Especially under high concentration and large flow conditions, the purification efficiency of acid mist can be increased by 20% to 30%, effectively meeting environmental emission requirements;

[0029] (2) The present invention adopts a gradually expanding and converging pipe design and uses low-resistance fillers, thereby reducing equipment resistance by 15% to 25%, effectively saving operating costs;

[0030] (3) The present invention can significantly reduce clogging and scaling problems by optimizing component materials and structures and combining them with automatic sewage drainage, thereby extending the service life of the equipment by 2 to 3 years and reducing maintenance costs;

[0031] (4) The present invention has a compact structure, which can reduce the equipment footprint by 30% to 50%, with high space utilization, and is particularly suitable for enterprises with limited space;

[0032] (5) The present invention can eliminate the risk of secondary pollution at the source, ensuring the safe treatment and reuse of the absorption liquid; at the same time, the anti-corrosion and anti-leakage design can ensure the safe operation of the equipment and avoid harm to the environment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a structural schematic diagram of a new type of high-efficiency acid mist absorber system of the present invention.

[0035] Figure 2 It is a structural schematic diagram of the plastic rosette filler of the present invention.

[0036] Figure 3 It is a structural schematic diagram of the swirl plate of the present invention.

[0037] Among them, 1-acid storage tank; 2-outlet valve I; 3-check valve I; 4-inlet main valve; 5-inlet valve I; 6-inlet valve II; 7-inlet valve III; 8-inlet valve IV; 9-bypass valve; 10-U-type water seal; 11-outlet valve II; 12-acid-resistant pump; 13-check valve II; 14-inlet valve V; 15-discharge valve; 16-spray pipe I; 17-spray pipe II; 18-plastic rosette packing; 19-PP corrugated packing; 20-nozzle I; 21-branch pipe; 22-absorption Liquid storage tank; 23-Neutralization tank; 24-Partition; 25-Exhaust valve I; 26-Acid mist absorber; 27-Exhaust valve II; 28-Nozzle II; 29-Exhaust valve III; 30-PH online monitor; 31-Inlet pipe; 32-Acid mist concentration online monitor I; 33-Exhaust pipe II; 34-Acid mist concentration online monitor II; 35-Exhaust pipe I; 36-Exhaust pipe III; 37-Liquid level gauge I; 38-Liquid level gauge II; 39-Alkali addition valve; 40-Discharge pump; 41-Swirl plate. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0039] The present invention is a novel high-efficiency acid mist absorber system, comprising an acid storage tank 1, a gradually expanding and contracting pipeline, an acid mist absorber 26, a spray pipe I 16, a plastic rosette filler 18, a spray pipe II 17, a PP corrugated filler 19, an absorption liquid storage tank 22 and a neutralization tank 23; the specific structure is as follows Figures 1 to 3As shown, inside the acid mist absorber 26, two layers of spray pipes I 16 and two layers of spray pipes II 17 are sequentially spaced from top to bottom, and a layer of plastic garland filler 18 is respectively filled between the two spray pipes I 16 and between the lower spray pipe I 16 and the upper spray pipe II 17 inside the acid mist absorber 26, and a layer of PP corrugated filler 19 is respectively filled between the two spray pipes II 17 and directly below the lower spray pipe II 17 inside the acid mist absorber 26; the acid storage tank 1 is sealedly connected to the bottom end of the interior of the acid mist absorber 26 through a gradually expanding-converging pipe, and the acid mist is sent to the acid mist absorber 26 for four-fold spraying and filler absorption; the liquid outlet of the acid mist absorber 26 is connected to the liquid inlet of the absorption liquid storage tank 22 through the drain pipe I, and the liquid outlet of the absorption liquid storage tank 22 is connected to the liquid inlet of the neutralization tank 23 through the drain pipe II.

[0040] like Figures 1 to 3 As shown, the inlet valve Ⅰ5 and the inlet valve Ⅱ6 are both pneumatic PPH diaphragm valves, and the inlet main valve 4 is an acid and alkali resistant pneumatic PPH diaphragm regulating valve; all the spray pipes Ⅰ16 of each layer are arranged horizontally and horizontally in parallel in the longitudinal direction, and a number of nozzles Ⅰ20 are arranged vertically and spaced in the lower surface of each spray pipe Ⅰ16 along its length. Each nozzle Ⅰ20 is made of wear-resistant and corrosion-resistant ceramic or silicon carbide material, and its aperture is 0.5-1mm, and then fine particles are generated through the nozzle Ⅰ20. Dense mist droplets are formed to enhance the capture of small-size acid mist particles; one end of all the spray pipes Ⅰ16 on the upper layer is gathered into one path and then extends vertically upward to the upper surface of the acid mist absorber 26, and is sealed and connected to the industrial water source through the inlet valve Ⅰ5 and the inlet main valve 4 in sequence through the pipeline; one end of all the spray pipes Ⅰ16 on the lower layer is gathered into one path and then extends horizontally and vertically to the right side of the acid mist absorber 26, and is sealed and connected to the pipeline located between the inlet valve Ⅰ5 and the inlet main valve 4 through the pipeline vertically upward.

[0041] like Figures 1 to 3As shown, the inlet valve III7 adopts a pneumatic PPH diaphragm valve, and the inlet valve IV8 adopts an acid- and alkali-resistant pneumatic PPH diaphragm regulating valve; all the spray pipes II17 of each layer are arranged horizontally and horizontally in parallel in the longitudinal direction, and a number of nozzles II28 are arranged vertically and spaced in the lower surface of each spray pipe II17 along its length. Each nozzle II28 is made of wear-resistant and corrosion-resistant ceramic or silicon carbide material, and its aperture is 2-3mm, thereby ensuring the initial absorption of large-flow acid mist through the nozzle II28, so that the gas-liquid contact More fully, improve the absorption efficiency; one end of all the spray pipes II17 on the upper layer is combined into one path and then extends horizontally and vertically out of the right side of the acid mist absorber 26, and is sealed and connected to the pipeline between the acid mist absorber 26 and the inlet valve II6 vertically upward through the pipeline; one end of all the spray pipes II17 on the lower layer is combined into one path and then extends horizontally and vertically out of the right side of the acid mist absorber 26, and is sealed and connected to the pipeline between the acid mist absorber 26 and the inlet valve III7 vertically upward through the pipeline. The nozzle I20 and nozzle II28 of the present invention can choose a low-resistance spray nozzle, such as a spiral nozzle. Its unique structural design can make the liquid atomized evenly and has less obstruction to the airflow, which can reduce a certain amount of equipment resistance compared to traditional nozzles.

[0042] like Figures 1 to 3 As shown, inside the acid mist absorber 26, relative to the position of each layer of plastic rosette filler 18 and each layer of PP corrugated filler 19, a partition 24 matching the inside of the acid mist absorber 26 is fixed horizontally, and each partition 24 supports the corresponding plastic rosette filler 18 or PP corrugated filler 19, and a plurality of small holes I are evenly spaced and vertically embedded in the upper surface of each partition 24; the two partitions 24 on the upper side are located in the middle and upper part of the acid mist absorber 26, and the two partitions 24 on the lower side are located in the middle and upper part of the acid mist absorber 26. It is located in the lower middle position inside the acid mist absorber 26; each layer of plastic garland filler 18 adopts φ25 plastic multi-faceted hollow balls made of PP material, and is respectively filled in the interior of the acid mist absorber 26 relative to the two partitions 24 on the upper side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle I 20; each layer of PP corrugated filler 19 adopts pressure-resistant PP corrugated plate, and is respectively filled in the interior of the acid mist absorber 26 relative to the two partitions 24 on the lower side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle II 28.

[0043] The gradually expanding-converging pipeline of the present invention comprises an inlet pipe 31, a branch pipe 21 and an outlet valve I2; Figures 1 to 3As shown, the liquid inlet of the acid mist absorber 26 is located at the bottom end of its left side, and the acid storage tank 1 is sealed and connected to the liquid inlet of the acid mist absorber 26 through an inlet pipe 31, and an outlet valve I2 for controlling its on and off is also connected on the inlet pipe 31, and the outlet valve I2 adopts a PPH ball valve; one end of the inlet pipe 31 extends horizontally and vertically to the right inner side of the interior of the acid mist absorber 26, and a number of branch pipes 21 are horizontally and vertically connected at intervals along its length on both sides of the extended part. The inner diameter of the inlet pipe 31 is larger than the inner diameter of each branch pipe 21, and a number of small holes II are vertically embedded and penetrated in the upper surface of each branch pipe 21 at intervals along its length, thereby forming a dendritic structure with a gradually expanding acid mist inlet and a gradually shrinking acid mist outlet, so that the acid mist in the acid storage tank 1 flows out through the small holes II and is subjected to four-fold spraying and filler absorption from bottom to top in the acid mist absorber 26. The present invention adopts a gradually expanding-converging pipe design, which can make the air flow enter and leave the acid mist absorber 26 smoothly, thereby reducing the eddy current and turbulence of the air flow and lowering the local resistance.

[0044] like Figures 1 to 3 As shown, a swirl plate 41 matching the same is horizontally provided inside the acid mist absorber 26 between the lower layer of plastic rosette filler 18 and the upper spray pipe II 17. The swirl plate 41 is made of acid-corrosion-resistant PP plate and is arranged in the middle position inside the acid mist absorber 26. The swirl plate 41 causes the passing airflow to generate a rotational motion, thereby extending the residence time of the acid mist in the acid mist absorber 26 and increasing the gas-liquid contact area to improve the absorption capacity of the acid mist.

[0045] like Figures 1 to 3As shown, the exhaust valve II 27 adopts a PPH ball valve, and the check valve I 3 adopts PPH material; an acid mist concentration online monitor I 32 is also connected to the inlet pipe 31 near the outlet valve I 2, and the acid mist concentration online monitor I 32 is used to monitor the acid mist concentration value volatilized from the acid storage tank 1; the exhaust port of the acid mist absorber 26 is provided on the upper surface away from the inlet valve I 5 side, and is connected to the outside world through the exhaust pipe II 33; the exhaust valve II 27 and the acid mist concentration online monitor II 34 are also connected in sequence on the exhaust pipe II 33, and the exhaust valve II 27 and the acid mist concentration online monitor II 34 are connected in sequence. The air valve II 27 is arranged on the side close to the acid mist absorber 26, and the exhaust valve II 27 controls the opening and closing of the exhaust pipe II 33, and the acid mist concentration online monitor II 34 is used to monitor the absorption of acid mist by the acid mist absorber 26. One end of the check valve I 3 is connected to the exhaust pipe II 33 located between the acid mist absorber 26 and the exhaust valve II 27 through a pipeline, and the other end is connected to the pipeline located between the outlet valve I 2 and the acid mist concentration online monitor I 32 through a pipeline, and the direction of the check valve I 3 is ensured to allow air to flow toward the inlet pipe 31. By providing the check valve I 3, the present invention can ensure that the positive pressure generated inside the acid mist absorber 26 is discharged in a timely manner when the acid mist is discharged. It can also ensure that when the acid storage tank 1 is releasing acid, a negative pressure is generated inside the acid storage tank 1, and air can smoothly enter the acid storage tank 1 through the check valve I 3 and the inlet pipe 31, thereby enabling the acid storage tank 1 to smoothly release the acid liquid.

[0046] like Figures 1 to 3 As shown, the liquid outlet of the acid mist absorber 26 is located on its right side near its bottom end, and a U-shaped water seal 10 is also provided on the drain pipe I. The two open ends of the U-shaped water seal 10 are vertically downwardly arranged and sealed and connected with the corresponding section of the drain pipe I. The drain pipe I is then divided into left and right ends by the U-shaped water seal 10, and the U-shaped water seal 10 ensures that there is a certain liquid level of industrial water at the bottom of the acid mist absorber 26; this ensures that the acid mist first contacts the industrial water at the bottom of the acid mist absorber 26, so that it can dissolve part of the acid mist, further improving the acid mist absorption efficiency; the bypass valve 9 is provided on the U-shaped water seal 10 Directly below it, and it adopts a pneumatic PPH diaphragm valve, one end of the bypass valve 9 is sealed and connected to the drain pipe I located on the left through a pipeline, and the other end thereof is sealed and connected to the corresponding drain pipe I located on the right through a pipeline, and then the industrial water at the bottom of the acid mist absorber 26 is discharged by opening the bypass valve 9; the present invention ensures that there is a certain liquid level of industrial water at the bottom of the acid mist absorber 26 when the bypass valve 9 is closed through the cooperation of the U-shaped water seal 10 and the bypass valve 9, and can discharge impurities and sediments accumulated at the bottom of the acid mist absorber 26 in time when the bypass valve 9 is opened to prevent them from clogging the drain pipe I.

[0047] like Figures 1 to 3As shown, a liquid level gauge I37 for monitoring the liquid level of the absorption liquid storage tank 22 is provided on the left side thereof, and an exhaust port of the absorption liquid storage tank 22 is provided on the right side of its upper surface and is connected to the outside through an exhaust pipe I35; an exhaust valve I25 is also provided on the exhaust pipe I35, and the exhaust valve I25 adopts a PPH ball valve, and the exhaust pipe I35 is controlled to be on and off by the exhaust valve I25;

[0048] like Figures 1 to 3 As shown, the liquid outlet of the absorption liquid storage tank 22 is arranged on the right side near its bottom end, and the outlet valve II11, the acid-resistant pump 12, the check valve II13 and the inlet valve V14 are sequentially connected and spaced on the discharge pipe II, and the outlet valve II11 is arranged on the side close to the absorption liquid storage tank 22. The outlet valve II11 and the inlet valve V14 are both PPH ball valves, and the check valve II13 is made of PPH material. When the outlet valve II11 and the inlet valve V14 are opened, the acid liquid in the absorption liquid storage tank 22 is pumped into the neutralization tank 23 through the acid-resistant pump 12 for neutralization with the alkali solution.

[0049] like Figures 1 to 3 As shown, a liquid level gauge II 38 for monitoring the liquid level is provided on the left side of the neutralization tank 23, and a pH online monitor 30 for monitoring the pH value is provided on the right side; the alkali addition port of the neutralization tank 23 is provided on the left side of its upper surface, and is sealed and connected to the alkali liquid source through an alkali addition pipe, and an alkali addition valve 39 is also provided on the alkali addition pipe. The alkali addition valve 39 adopts a pneumatic PPH diaphragm regulating valve, and the amount of alkali liquid added to the neutralization tank 23 is adjusted by the alkali addition valve 39; the exhaust port of the neutralization tank 23 is provided on the right side of its upper surface and is connected to the outside through an exhaust pipe III 36 ; An exhaust valve III29 is also provided on the exhaust pipe III36, and the exhaust valve III29 adopts a PPH ball valve, and the exhaust pipe III36 is controlled by the exhaust valve III29; the liquid outlet of the neutralization tank 23 is located on its right side near its bottom end, and it is connected to the outside through the drainage pipe III; the discharge valve 15 and the discharge pump 40 are also connected in sequence on the drainage pipe III, and the discharge valve 15 is provided on the side close to the neutralization tank 23, and it adopts a pneumatic PPH diaphragm valve, and then when the discharge valve 15 is opened, the neutralized solution is discharged through the discharge pipe III by the discharge pump 40.

[0050] The present invention adopts a vertical multi-layer design for the acid mist absorber 26 and arranges the spray layer and the filler layer in a reasonable and compact manner, thereby making full use of the vertical space and reducing the floor space in the horizontal direction.

[0051] The present invention provides a novel control method for a high-efficiency acid mist absorber system, such as Figures 1 to 3 As shown, the following steps are included:

[0052] (1) Under normal operating conditions, outlet valve I2, outlet valve II11, inlet valve V14, exhaust valve I25, exhaust valve II27, and exhaust valve III29 are all in the fully open state;

[0053] (2) According to the concentration value monitored by the acid mist concentration online monitor Ⅰ32, three levels of low, medium and high are set, and then the opening of the inlet main valve 4 and the inlet valve IV8 are set according to the three levels, and all or part of the inlet valve Ⅰ5, inlet valve Ⅱ6, inlet valve Ⅲ7 and inlet valve IV8 are selected for use according to the three levels.

[0054] (3) The hydrochloric acid stored in the acid storage tank 1 will volatilize and generate acid mist. In particular, a large amount of acid mist will be generated during the process of transporting the hydrochloric acid to the acid storage tank 1. The acid mist will flow out through the outlet valve I2, the inlet pipe 31, the branch pipe 21 and the small hole II in sequence, and will first be initially absorbed by the industrial water at the bottom of the acid mist absorber 26. Then, it will be sprayed and absorbed by the filler in the acid mist absorber 26 from bottom to top. Specifically:

[0055] (3.1) Low level: Set the opening of the inlet main valve 4 to 30% and fully open the inlet valve I5.

[0056] (3.2) Medium level: Set the opening of the inlet main valve 4 to 60%, and fully open the inlet valve I5 and the inlet valve II6.

[0057] (3.3) High level: Set the opening of the inlet main valve 4 to 100%, and fully open the inlet valve I5, the inlet valve II6, and the inlet valve III7.

[0058] (3.4) The inlet valve IV8 is used as an auxiliary supplement, and its opening size is determined according to the concentration value monitored by the acid mist concentration online monitor II34 until the concentration value monitored by the acid mist concentration online monitor II34 reaches 0.

[0059] (4) The acid mist is discharged through the exhaust pipe II 33 after being sprayed and absorbed by the filler, and the acid liquid is collected into the absorption liquid storage tank 22 for storage through the U-shaped water seal 10 and the drainage pipe I; when the acid liquid level in the absorption liquid storage tank 22 reaches 2 / 3 to 3 / 4, the acid-resistant pump 12 is started to pump the acid liquid in the absorption liquid storage tank 22 into the neutralization tank 23; at this time, the opening size of the alkali adding valve 39 is adjusted according to the monitoring value of the pH online monitor 30, and when the pH value of the solution in the neutralization tank 23 is adjusted to 6 to 9 by adding alkali liquid, the alkali adding valve 39 is closed, and after 20 seconds, the discharge valve 15 is started, and the neutralized solution is discharged through the discharge pump 40.

[0060] (5) When the bottom of the acid mist absorber 26 needs to be cleaned, the bypass valve 9 is opened, and the impurities and sediments accumulated at the bottom of the acid mist absorber 26 can be discharged through the bypass valve 9.

[0061] Beneficial effects of the present invention:

[0062] (1) The present invention adopts a design of alternating multi-stage spraying and packing layers, which can significantly improve the capture efficiency of acid mist particles of different particle sizes from the two aspects of physical contact and enhanced absorption. Especially under high concentration and large flow conditions, the purification efficiency of acid mist can be increased by 20% to 30%, effectively meeting environmental emission requirements;

[0063] (2) The present invention adopts a gradually expanding and converging pipe design and uses low-resistance fillers, thereby reducing equipment resistance by 15% to 25%, effectively saving operating costs;

[0064] (3) The present invention can significantly reduce clogging and scaling problems by optimizing component materials and structures and combining them with automatic sewage drainage, thereby extending the service life of the equipment by 2 to 3 years and reducing maintenance costs;

[0065] (4) The present invention has a compact structure, which can reduce the equipment footprint by 30% to 50%, with high space utilization, and is particularly suitable for enterprises with limited space;

[0066] (5) The present invention can eliminate the risk of secondary pollution at the source, ensuring the safe treatment and reuse of the absorption liquid; at the same time, the anti-corrosion and anti-leakage design can ensure the safe operation of the equipment and avoid harm to the environment and personnel.

[0067] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary engineering technicians in this field should fall within the scope of protection of the present invention. The technical contents to be protected by the present invention have been fully recorded in the technical requirements.

Claims

1. A new type of high-efficiency acid mist absorber system, characterized by: The invention comprises an acid storage tank, a gradually expanding and contracting pipeline, an acid mist absorber, a spray pipe I, a plastic rosette filler, a spray pipe II, a PP corrugated filler, an absorption liquid storage tank and a neutralization tank; two layers of spray pipe I and two layers of spray pipe II are sequentially spaced from top to bottom inside the acid mist absorber, and a layer of plastic rosette filler is respectively filled between the two spray pipes I and between the lower spray pipe I and the upper spray pipe II inside the absorber, and a layer of PP corrugated filler is respectively filled between the two spray pipes II and directly below the lower spray pipe II inside the absorber; the acid storage tank is sealedly connected to the bottom end of the interior of the acid mist absorber through the gradually expanding and contracting pipeline, and the acid mist is sent to the acid mist absorber for quadruple spraying and filler absorption; the liquid outlet of the acid mist absorber is connected to the liquid inlet of the absorption liquid storage tank through the drain pipe I, and the liquid outlet of the absorption liquid storage tank is connected to the liquid inlet of the neutralization tank through the drain pipe II.

2. A novel high-efficiency acid mist absorber system according to claim 1, characterized in that: It also includes an inlet valve I, an inlet valve II and an inlet main valve; the inlet valve I and the inlet valve II are both pneumatic PPH diaphragm valves, and the inlet main valve is an acid and alkali resistant pneumatic PPH diaphragm regulating valve; all the spray pipes I of each layer are arranged horizontally and horizontally in parallel in the longitudinal direction, and a plurality of nozzles I are arranged vertically and spaced in sequence on the lower surface of each spray pipe I along its length. Each nozzle I is made of wear-resistant and corrosion-resistant ceramic or silicon carbide, and its aperture is 0.5-1mm, thereby Fine droplets are generated through nozzle I to enhance the capture of small-particle acid mist particles; one end of all the spray pipes I on the upper layer is gathered into one and then extends vertically upward from the upper surface of the acid mist absorber, and is sealed and connected to the industrial water source through the inlet valve I and the inlet main valve in sequence through the pipeline; one end of all the spray pipes I on the lower layer is gathered into one and then extends horizontally and vertically out of the right side of the acid mist absorber, and is sealed and connected to the pipeline located between the inlet valve I and the inlet main valve through the pipeline vertically upward through the inlet valve II.

3. A novel high-efficiency acid mist absorber system according to claim 2, characterized in that: It also includes an inlet valve III and an inlet valve IV; the inlet valve III adopts a pneumatic PPH diaphragm valve, and the inlet valve IV adopts an acid- and alkali-resistant pneumatic PPH diaphragm regulating valve; all the spray pipes II of each layer are arranged horizontally and horizontally in parallel in the longitudinal direction, and a number of nozzles II are arranged vertically and spaced in sequence on the lower surface of each spray pipe II along its length direction, each of the nozzles II is made of wear-resistant and corrosion-resistant ceramic or silicon carbide material, and its aperture is 2-3mm, thereby ensuring the initial absorption of large-flow acid mist through nozzle II; one end of all the spray pipes II of the upper layer are gathered into one and then extended horizontally and vertically out of the right side of the acid mist absorber, and are vertically upward through the inlet valve III and sealedly connected to the pipe section between the acid mist absorber and the inlet valve II; one end of all the spray pipes II of the lower layer are gathered into one and then extended horizontally and vertically out of the right side of the acid mist absorber, and are vertically upward through the inlet valve IV and sealedly connected to the pipe section between the acid mist absorber and the inlet valve III.

4. A novel high-efficiency acid mist absorber system according to claim 3, characterized in that: It also includes partitions; partitions matching the interior of the acid mist absorber are horizontally fixed relative to the position of each layer of plastic garland filler and each layer of PP corrugated filler, and each of the partitions supports the corresponding plastic garland filler or PP corrugated filler, and a number of small holes I are evenly spaced and vertically embedded on the upper surface of each partition; the two partitions on the upper side are located in the upper middle position of the interior of the acid mist absorber, and the two partitions on the lower side are located in the lower middle position of the interior of the acid mist absorber; each layer of the plastic garland filler adopts PP material φ25 plastic multi-faceted hollow balls, and is respectively filled in the interior of the acid mist absorber relative to the two partitions on the upper side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle I; each layer of the PP corrugated filler adopts pressure-resistant PP corrugated plates, and is respectively filled in the interior of the acid mist absorber relative to the two partitions on the lower side, and it is necessary to ensure that there is no interference with the spraying action of the corresponding nozzle II.

5. A novel high-efficiency acid mist absorber system according to claim 4, characterized in that: The gradually expanding and gradually converging pipeline includes an inlet pipe, a branch pipe and an outlet valve I; the liquid inlet of the acid mist absorber is arranged at the bottom end of its left side, and the acid storage tank is sealed and connected to the liquid inlet of the acid mist absorber through the inlet pipe, and an outlet valve I for controlling its on and off is also connected on the inlet pipe, and the outlet valve I is made of PPH material ball valve; one end of the inlet pipe extends horizontally and vertically to the right inner side surface of the interior of the acid mist absorber, and several branch pipes are horizontally and vertically connected at intervals on the front and back sides of the extended part along its length direction. The inner diameter of the inlet pipe is larger than the inner diameter of each of the branch pipes, and several small holes II are vertically embedded and penetrated in the upper surface of each of the branch pipes at intervals along its length direction, thereby forming a dendritic structure with a gradually expanding acid mist inlet and a gradually converging acid mist outlet, so that the acid mist in the acid storage tank flows out through the small hole II and undergoes four-fold spraying and filler absorption from bottom to top in the acid mist absorber.

6. A novel high-efficiency acid mist absorber system according to claim 5, characterized in that: A swirl plate matching the above is horizontally provided inside the acid mist absorber between a lower layer of plastic rosette filler and an upper spray pipe II. The swirl plate is made of an acid-corrosion-resistant PP plate and is arranged in the middle position inside the acid mist absorber. The swirl plate causes the passing airflow to produce a rotating motion, thereby extending the residence time of the acid mist in the acid mist absorber and increasing the gas-liquid contact area.

7. A novel high-efficiency acid mist absorber system according to claim 6, characterized in that: It also includes an acid mist concentration online monitor I, a check valve I, an exhaust pipe II, an exhaust valve II and an acid mist concentration online monitor II; the exhaust valve II adopts a PPH ball valve, and the check valve I adopts PPH material; an acid mist concentration online monitor I is also connected on the inlet pipe near the outlet valve I, and the acid mist concentration value volatilized from the acid storage tank is monitored by the acid mist concentration online monitor I; the exhaust port of the acid mist absorber is arranged on the side of its upper surface away from the inlet valve I, and is connected to the outside world through the exhaust pipe II; the exhaust valve II and the acid mist concentration online monitor are also connected in sequence on the exhaust pipe II. Ⅱ, the exhaust valve Ⅱ is arranged on the side of the acid mist absorber, and the exhaust pipe Ⅱ is controlled by the exhaust valve Ⅱ, and the acid mist absorption of the acid mist by the acid mist absorber is monitored by the acid mist concentration online monitor Ⅱ; one end of the check valve Ⅰ is connected to the exhaust pipe Ⅱ located between the acid mist absorber and the exhaust valve Ⅱ through a pipeline, and the other end is connected to the pipeline located between the outlet valve Ⅰ and the acid mist concentration online monitor Ⅰ through a pipeline, and ensure that the direction of the check valve Ⅰ is that the air flows to the inlet pipe, thereby ensuring that the positive pressure generated inside the acid mist absorber is discharged in time, and ensuring that the acid storage tank releases the acid smoothly.

8. A novel high-efficiency acid mist absorber system according to claim 7, characterized in that: The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. The condenser valve is connected to the outlet of the acid mist absorber, and the condenser valve is connected to the outlet of the acid mist absorber. Membrane valve, one end of the bypass valve is sealed and connected to the drain pipe I located on the left through a pipe, and the other end is sealed and connected to the corresponding drain pipe I located on the right through a pipe, and the industrial water at the bottom of the acid mist absorber is discharged by opening the bypass valve; a liquid level gauge I for monitoring the liquid level of the absorption liquid storage tank is also provided on the left side of the absorption liquid storage tank, and the exhaust port of the absorption liquid storage tank is provided on the right side of its upper surface and is connected to the outside world through the exhaust pipe I; an exhaust valve I is also provided on the exhaust pipe I, and the exhaust valve I adopts a PPH ball valve, and the exhaust pipe I is controlled to be on and off by the exhaust valve I; The liquid outlet of the absorption liquid storage tank is arranged on the right side near its bottom end, and the outlet valve II, acid-resistant pump, check valve II and inlet valve V are sequentially connected and connected on the discharge pipe II. The outlet valve II is arranged on the side close to the absorption liquid storage tank. The outlet valve II and the inlet valve V are both PPH ball valves, and the check valve II is made of PPH material. When the outlet valve II and the inlet valve V are opened, the acid in the absorption liquid storage tank is pumped into the neutralization tank by the acid-resistant pump for neutralization with the alkali solution.

9. A novel high-efficiency acid mist absorber system according to claim 8, characterized in that: It also includes a liquid level meter II, a drain pipe III, a discharge valve, a discharge pump, an alkali adding pipe, an alkali adding valve, an exhaust pipe III, an exhaust valve III and a pH online monitor; a liquid level meter II for monitoring its liquid level is provided on the left side of the neutralization tank, and a pH online monitor for monitoring its pH value is provided on the right side; the alkali adding port of the neutralization tank is provided on the left side of its upper surface, and is sealed and connected to the alkali liquid source through the alkali adding pipe, and an alkali adding valve is also provided on the alkali adding pipe, the alkali adding valve adopts a pneumatic PPH diaphragm regulating valve, and the amount of alkali liquid added to the neutralization tank is adjusted by the alkali adding valve; the drain of the neutralization tank The air inlet is located on the right side of its upper surface and is connected to the outside world through the exhaust pipe III; the exhaust valve III is also connected to the exhaust pipe III, and the exhaust valve III adopts a PPH ball valve, and the exhaust pipe III is controlled by the exhaust valve III; the liquid outlet of the neutralization tank is located on the right side near its bottom end, and is connected to the outside world through the drainage pipe III; the drainage pipe III is also connected with a discharge valve and a discharge pump at intervals, and the discharge valve is located on the side close to the neutralization tank, and adopts a pneumatic PPH diaphragm valve, and when the discharge valve is opened, the neutralized solution is discharged through the discharge pipe III by the discharge pump.

10. The control method of a novel high-efficiency acid mist absorber system according to claim 9, characterized in that The following steps are involved: (1) Under normal operating conditions, outlet valve I, outlet valve II, inlet valve V, exhaust valve I, exhaust valve II and exhaust valve III are all in the fully open state; (2) According to the concentration value monitored by the acid mist concentration online monitor I, three levels of low, medium and high are set, and then the opening of the inlet main valve and the inlet valve IV are set according to the three levels, and according to the three levels, all or part of the inlet valve I, inlet valve II, inlet valve III and inlet valve IV are selected for use; (3) The acid mist in the acid storage tank flows out through the outlet valve I, the inlet pipe, the branch pipe and the small hole II in sequence, and is initially absorbed by the industrial water at the bottom of the acid mist absorber, and then sprayed and absorbed by the filler from bottom to top in the acid mist absorber; specifically: (3.1) Low level: Set the opening of the inlet main valve to 30% and fully open the inlet valve I; (3.2) Moderate level: Set the opening of the inlet main valve to 60%, and fully open inlet valves I and II; (3.3) High level: Set the opening of the inlet main valve to 100%, and fully open inlet valves I, II, and III; (3.4) Inlet valve IV is used as an auxiliary supplement, and its opening size is determined according to the concentration value monitored by the acid mist concentration online monitor II until the concentration value monitored by the acid mist concentration online monitor II reaches 0; (4) The acid mist is discharged through the exhaust pipe II after being sprayed and absorbed by the filler, and the acid liquid is collected into the absorption liquid storage tank through the U-shaped water seal and the drain pipe I for storage; when the acid liquid level in the absorption liquid storage tank reaches 2 / 3 to 3 / 4, the acid-resistant pump is started to pump the acid liquid in the absorption liquid storage tank into the neutralization tank; at this time, the opening size of the alkali adding valve is adjusted according to the monitoring value of the pH online monitor, and when the pH value of the solution in the neutralization tank is adjusted to 6 to 9 by adding alkali liquid, the alkali adding valve is closed, and the discharge valve is started after 20 seconds, and the neutralized solution is discharged through the discharge pump; (5) When the bottom of the acid mist absorber needs to be cleaned, open the bypass valve. At this time, the impurities and sediments accumulated at the bottom of the acid mist absorber can be discharged through the bypass valve.

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