A waste gas treatment pickling tower

Abstract

The utility model discloses a waste gas treatment pickling tower relates to pickling tower technical field, including pickling tower body, pretreatment heat dissipation jar and liquid storage tank, and pretreatment heat dissipation jar fixedly connected in the top of liquid storage tank, and the inside of pretreatment heat dissipation jar and liquid storage tank is in parallel, and the inside of liquid storage tank is equipped with alkaline solution. The utility model discloses through the circulating spray mechanism can extract atomized alkaline solution and spray downward, and the high temperature waste gas flowing upward is contacted, and droplet heat absorption evaporation, reduce the temperature of waste gas, avoid the damage to the material of pickling tower inside, also avoid the influence to the subsequent purification treatment efficiency, then and waste gas neutralization reaction, reach the effect of pre -purification to reduce the waste gas acidity, reduce the subsequent processing load, and the dust particle in liquid and waste gas contact, utilize the wetting and inertial collision effect of droplet, make dust particle weight gain and settle down, thereby reach the effect of dust fall.

Description

Technical Field

[0001] This utility model belongs to the field of acid washing tower technology, and in particular relates to an acid washing tower for waste gas treatment. Background Technology

[0002] Acid washing towers are devices used to treat industrial waste gases containing acidic or alkaline components, purifying the gases through absorption and neutralization reactions. Their core principle is liquid absorption, where acidic gases (such as sulfur dioxide, hydrogen chloride, and hydrogen fluoride) in the waste gas are reacted with an absorbent liquid (such as sulfuric acid or an alkaline solution), thereby purifying the waste gas. Acid washing towers are widely used in industries such as chemical, electronics, metallurgy, electroplating, textiles, food, and machinery manufacturing, effectively removing acidic gases generated during industrial production and preventing environmental pollution. For example, in the chemical industry, acid washing towers are commonly used to treat waste gases containing acidic gases such as sulfur dioxide and sulfur trioxide produced after sulfuric acid production.

[0003] For example, CN219168121U discloses a waste gas treatment pickling tower, comprising a pickling tower body. A spray frame is installed near the upper part of the inner cavity of the pickling tower body. One end of the spray frame is connected to a liquid inlet pipe, and the end of the liquid inlet pipe is connected to a reaction liquid storage box. A connecting pipe is installed at the lower end of the inner cavity of the reaction liquid storage box and communicates with the pickling tower body. A waste gas inlet pipe is installed on the other side of the inner cavity of the pickling tower body. An air intake fan is installed near the outer wall of the waste gas inlet pipe. A gas circulation pipe is fixedly installed at the upper outer end of the waste gas inlet pipe. A top cover is inserted into the other end of the gas circulation pipe. A detection chamber is located at the upper end of the top cover, and a neutralization treatment chamber is located at the lower end of the top cover. This invention, under the action of the air intake fan, allows for secondary reactions inside the pickling tower body, increasing the number of reactions between the waste gas and the interior of the pickling tower body and improving the waste gas purification effect.

[0004] The above-mentioned patent has the following defects in use:

[0005] The waste gas directly enters the pickling tower through the waste gas inlet pipe without a corresponding pretreatment mechanism. The waste gas, such as the waste gas generated after sulfuric acid production, not only contains acidic gases such as sulfur dioxide and sulfur trioxide, but also carries dust and heat. Dust can cause blockage of equipment pipes, and high-temperature gas can damage the materials inside the pickling tower, while also affecting the efficiency of subsequent purification treatment. Therefore, this utility model proposes a waste gas treatment pickling tower. Utility Model Content

[0006] This invention provides an acid washing tower for waste gas treatment. A circulating spray mechanism draws atomized alkaline solution and sprays it downwards, where it contacts the upward-flowing high-temperature waste gas. The droplets absorb heat and evaporate, lowering the temperature of the waste gas and preventing damage to the internal materials of the acid washing tower. This also avoids affecting the efficiency of subsequent purification treatment. The solution then undergoes a neutralization reaction with the waste gas, achieving a pre-purification effect, thereby reducing the acidity of the waste gas and lessening the load on subsequent treatment. Simultaneously, the liquid contacts dust particles in the waste gas, and the wetting and inertial collision of the droplets causes the dust particles to become heavier and settle, achieving a dust reduction effect. A detection and replenishment mechanism uses a pH sensor to monitor the pH value of the alkaline solution inside the storage tank in real time. When the pH value falls below a set threshold, the concentrated alkaline solution in the storage cone is automatically replenished to the storage tank to maintain the alkaline concentration of the solution, preventing solution failure due to neutralization reaction and ensuring stable pre-treatment results. In summary, this invention solves the problems in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model discloses an acid washing tower for waste gas treatment, comprising:

[0009] The pickling tower body, the pretreatment heat dissipation tank, and the storage tank are provided. The pretreatment heat dissipation tank is fixedly connected to the top of the storage tank, and the interiors of the pretreatment heat dissipation tank and the storage tank are in communication. The storage tank contains an alkaline solution. The pickling tower body and the pretreatment heat dissipation tank are connected by a waste gas inlet pipe through a flange and hexagonal bolts. The outer wall of the pretreatment heat dissipation tank is connected by a gas transmission pipe through a flange and hexagonal bolts.

[0010] A circulating spraying mechanism is provided between the pretreatment heat dissipation tank and the liquid storage tank, and the circulating spraying mechanism is used for the pretreatment of waste gas.

[0011] A detection and replenishment mechanism is provided, which is located on the top of the storage tank and is used for detecting and replenishing the concentration of alkaline solution.

[0012] The circulating spray mechanism includes a circulating pump fixedly connected to the outer wall of the storage tank. A suction pipe is fixedly connected to the inner wall of the storage tank, and one end of the suction pipe penetrates the inner wall of the storage tank and is fixedly connected to the suction end of the circulating pump. A discharge pipe is fixedly connected to the discharge end of the circulating pump, and one end of the discharge pipe penetrates the outer wall of the pretreatment heat dissipation tank and extends into it, where an annular pipe is fixedly connected. Multiple first atomizing nozzles and second atomizing nozzles are fixedly connected to the bottom of the annular pipe, and the multiple first atomizing nozzles and second atomizing nozzles are all located at the bottom of the exhaust gas inlet pipe. A waterproof and breathable membrane is fixedly connected to the inner wall of the exhaust gas inlet pipe.

[0013] Furthermore, all of the first atomizing nozzles are vertically arranged, and all of the second atomizing nozzles are inclined, with the inclination direction facing the center of the annular tube.

[0014] Furthermore, a dust filter is fixedly connected to the inner wall of the liquid storage tank, and the dust filter is located on one side of the liquid extraction pipe.

[0015] Furthermore, a rectangular opening is cut at the top of the liquid storage tank, and a sealing cover is connected to the rectangular opening by hexagonal bolts. The outer wall of the sealing cover is in close contact with the inner wall of the rectangular opening.

[0016] Furthermore, the detection and replenishment mechanism includes a liquid storage cone, inside which is a concentrated alkaline solution. A connecting pipe is fixedly connected to the bottom end of the liquid storage cone, and the bottom end of the connecting pipe is connected to the top end of a sealing cover plate. The connecting pipe is in communication with the interior of the liquid storage tank, and an electric control valve is fixedly connected to the outer wall of the connecting pipe. A pH sensor is embedded in the top end of the sealing cover plate, and the probe of the pH sensor is located inside the liquid storage tank. The pH sensor is electrically connected to the electric control valve through an external main controller.

[0017] Furthermore, the top of the liquid storage cone is open, and a sealing plug is fitted on the top of the liquid storage cone, with the outer wall of the sealing plug in close contact with the inner wall of the liquid storage cone.

[0018] Furthermore, multiple heat sinks are fixedly connected to the outer wall of the liquid storage tank.

[0019] The present invention has the following advantages over the prior art:

[0020] 1. This technical solution, through its circulating spray mechanism, can extract atomized alkaline solution and spray it downwards to contact the upward-flowing high-temperature waste gas. The droplets absorb heat and evaporate, reducing the temperature of the waste gas and preventing damage to the internal materials of the pickling tower. This also avoids affecting the efficiency of subsequent purification treatment. Then, it undergoes a neutralization reaction with the waste gas, achieving a pre-purification effect, thereby reducing the acidity of the waste gas and reducing the load on subsequent treatment. At the same time, the liquid comes into contact with dust particles in the waste gas, and the wetting and inertial collision of the droplets causes the dust particles to increase in weight and settle, thereby achieving a dust reduction effect.

[0021] 2. This technical solution, through its detection and replenishment mechanism, can detect the pH value of the alkaline solution inside the storage tank in real time using a pH sensor. When the pH value is lower than the set threshold, it automatically replenishes the concentrated alkaline solution in the storage cone to the storage tank, maintaining the alkaline concentration of the solution and preventing solution failure due to neutralization reaction, thus ensuring stable pretreatment results.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of an acid washing tower for waste gas treatment according to the present invention;

[0025] Figure 2 This is a partial cross-sectional structural diagram of an acid washing tower for waste gas treatment according to the present invention.

[0026] Figure 3 This is a partial cross-section and structural diagram of an acid washing tower for waste gas treatment according to this utility model from another perspective.

[0027] Figure 4 This is a partial disassembled structural diagram of the sealing cover and the detection and replenishment mechanism in this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Pickling tower body; 2. Pretreatment heat dissipation tank; 3. Liquid storage tank; 4. Exhaust gas inlet pipe; 5. Gas transmission pipe; 6. Circulating spray mechanism; 601. Circulating pump; 602. Liquid extraction pipe; 603. Liquid discharge pipe; 604. Annular pipe; 605. First atomizing nozzle; 606. Second atomizing nozzle; 607. Dustproof filter; 608. Waterproof and breathable membrane; 7. Sealing cover plate; 8. Detection and replenishment mechanism; 801. Liquid storage cone; 802. Connecting pipe; 803. Electric control valve; 804. pH sensor; 805. Sealing plug; 9. Heat sink. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Specific Implementation Example 1:

[0033] Please see Figures 1-4 As shown, the present invention provides an acid washing tower for waste gas treatment, comprising:

[0034] The acid pickling tower body 1, the pretreatment heat dissipation tank 2, and the liquid storage tank 3 are connected. The pretreatment heat dissipation tank 2 is fixedly connected to the top of the liquid storage tank 3, and the interiors of the pretreatment heat dissipation tank 2 and the liquid storage tank 3 are in communication. The interior of the liquid storage tank 3 is filled with an alkaline solution. The acid pickling tower body 1 and the pretreatment heat dissipation tank 2 are connected by a flange and hexagonal bolts to a waste gas inlet pipe 4. The outer wall of the pretreatment heat dissipation tank 2 is connected by a gas transmission pipe 5 through a flange and hexagonal bolts.

[0035] The circulating spray mechanism 6 is located between the pretreatment heat dissipation tank 2 and the liquid storage tank 3, and is used for the pretreatment of waste gas.

[0036] The detection and replenishment mechanism 8 is located on the top of the storage tank 3 and is used for the detection and replenishment of the alkaline solution concentration.

[0037] The circulating spray mechanism 6 includes a circulating pump 601 fixedly connected to the outer wall of the storage tank 3. A suction pipe 602 is fixedly connected to the inner wall of the storage tank 3, and one end of the suction pipe 602 penetrates the inner wall of the storage tank 3 and is fixedly connected to the suction end of the circulating pump 601. A discharge pipe 603 is fixedly connected to the discharge end of the circulating pump 601, and one end of the discharge pipe 603 penetrates the outer wall of the pretreatment heat dissipation tank 2 and extends into it to be fixedly connected to an annular pipe 604. Multiple first atomizing nozzles 605 and second atomizing nozzles 606 are fixedly connected to the bottom of the annular pipe 604, and the multiple first atomizing nozzles 605 and second atomizing nozzles 606 are all located at the bottom of the exhaust gas inlet pipe 4. A waterproof and breathable membrane 608 is fixedly connected to the inner wall of the exhaust gas inlet pipe 4.

[0038] In the specific implementation process, sulfuric acid waste gas enters the storage tank 3 through the gas transmission pipe 5 and flows upward. At the same time, the driving circulation pump 601 draws alkaline solution from inside the storage tank 3 through the extraction pipe 602. The alkaline solution can be used for neutralization and pre-purification. The specific solution selection can be determined according to the actual usage. In this scheme, NaOH solution is selected. The NaOH solution flows into the annular pipe 604 through the drain pipe 603, and is then atomized and sprayed downward by multiple first atomizing nozzles 605 and second atomizing nozzles 606. It comes into contact with the upward-flowing high-temperature waste gas. At the moment of contact, the droplets absorb heat and evaporate, reducing the temperature of the waste gas and avoiding damage to the internal materials of the acid washing tower, as well as avoiding affecting the subsequent purification treatment. Efficiency is improved by the NaOH solution reacting with the acidic sulfur dioxide gas in the exhaust gas (reaction formula: SO2 + 2NaOH → Na2SO3 + H2O), achieving pre-purification and reducing the acidity of the exhaust gas, thus reducing the load on subsequent treatment. Simultaneously, the liquid contacts the dust particles in the exhaust gas, utilizing the wetting and inertial collision effects of the droplets to increase the weight of the dust particles and cause them to settle, achieving dust reduction. The settled dust falls into the storage tank 3 along with the NaOH solution. After entering the storage tank 3, the NaOH solution can be recycled by the circulation pump 601, improving resource utilization and reducing operating costs. Then, the pre-treated exhaust gas enters the exhaust gas system through the waterproof and breathable membrane 608. Inside the inlet pipe 4, the waste gas enters the acid washing tower body 1 for subsequent purification treatment. This solution, based on existing technology, primarily improves the external structure of the prior art referenced in the background document (An Acid Washing Tower for Waste Gas Treatment). Specifically, it adds a pretreatment heat dissipation tank 2, a liquid storage tank 3, a circulating spray mechanism 6, and a detection and replenishment mechanism 8 before the waste gas inlet pipe 4 for the pretreatment of sulfuric acid waste gas. These improvements do not require changes to the internal structure of the existing technology, as its internal structure is consistent with the prior art reference (An Acid Washing Tower for Waste Gas Treatment), and therefore will not be elaborated upon here. Furthermore, several components of this solution require corrosion-resistant materials to resist corrosion from sulfuric acid waste gas and alkaline solutions during use, such as the pretreatment heat dissipation tank. 2. The system is made of 2205 duplex stainless steel with a heat dissipation layer on the surface, utilizing the dissipation of internal reaction heat. The liquid storage tank 3 is made of fiberglass with a vinyl ester resin lining. The exhaust gas inlet pipe 4 and the gas delivery pipe 5 are both made of homopolymer polypropylene. The liquid extraction pipe 602 and the liquid discharge pipe 603 are both made of chlorinated polyvinyl chloride. The annular pipe 604, the first atomizing nozzle 605, and the second atomizing nozzle 606 are all made of 316L stainless steel. The waterproof and breathable membrane 608 is made of expanded polytetrafluoroethylene (ePTFE). The dust filter 607 is made of 316L stainless steel sintered mesh. The sealing cover 7 is made of polypropylene. The liquid storage cone 801 and the connecting pipe 802 are both made of transparent PVDF. The electric control valve 803 uses a CPVC valve body with an EPDM sealing assembly.

[0039] Among them, the multiple first atomizing nozzles 605 are all vertically arranged, and the multiple second atomizing nozzles 606 are all inclined, with the inclined direction facing the center of the annular tube 604.

[0040] The vertical first atomizing nozzle 605 and the inclined second atomizing nozzle 606 enable a wider spray range of atomized droplets.

[0041] The inner wall of the liquid storage tank 3 is fixedly connected with a dust filter 607, and the dust filter 607 is located on one side of the liquid extraction pipe 602.

[0042] The dust filter 607 is designed to filter and intercept settled dust, preventing it from clogging the pipes during circulation.

[0043] The top of the liquid storage tank 3 has a rectangular opening, and a sealing cover 7 is connected to the rectangular opening by hexagonal bolts. The outer wall of the sealing cover 7 is in close contact with the inner wall of the rectangular opening.

[0044] The sealing cover 7 facilitates the opening and sealing of the rectangular opening, making it easier to clean the inside of the liquid storage tank 3. Specific Implementation Example 2:

[0046] Please see Figure 1 , Figure 3 and Figure 4 As shown, in a preferred embodiment, the detection and replenishment mechanism 8 includes a liquid storage cone 801, which contains a concentrated alkaline solution. A connecting pipe 802 is fixedly connected to the bottom end of the liquid storage cone 801, and the bottom end of the connecting pipe 802 is connected to the top end of the sealing cover plate 7. The connecting pipe 802 is in communication with the interior of the liquid storage tank 3, and an electric control valve 803 is fixedly connected to the outer wall of the connecting pipe 802. A pH sensor 804 is embedded and connected to the top end of the sealing cover plate 7, and the probe of the pH sensor 804 is located inside the liquid storage tank 3. The pH sensor 804 is electrically connected to the electric control valve 803 through an external main controller.

[0047] In the specific implementation process, the pH sensor 804 is mainly used for real-time detection of the pH value of alkaline solutions. The specific model is selected according to the actual use. In this solution, Mettler Toledo InPro 4260 i is selected. The electrode material is equipped with a glass membrane made of high-alkali lithium glass, and the shell material is polyphenylene sulfone. When the pH value is lower than the set threshold, that is, when the alkalinity is insufficient, the main controller drives the electric control valve 803 to open, so that the concentrated alkaline solution in the liquid storage cone 801 is automatically replenished into the liquid storage tank 3 to maintain the alkalinity concentration of the solution, avoid the solution failure due to neutralization reaction, and ensure the stability of the pretreatment effect.

[0048] The liquid storage cone 801 has an open top and a sealing plug 805 is fitted on the top of the liquid storage cone 801. The outer wall of the sealing plug 805 is in close contact with the inner wall of the liquid storage cone 801.

[0049] By setting the sealing plug 805, when adding concentrated alkaline solution into the liquid storage cone 801, the sealing plug 805 can be removed so that the operator can add the solution through the top opening. After the addition is completed, the sealing plug 805 can be put back on to seal the container.

[0050] The outer wall of the liquid storage tank 3 is fixedly connected with multiple heat sinks 9.

[0051] The heat sink 9 is designed to accelerate the dissipation of heat from the alkaline solution flowing back into the liquid storage tank 3, thus facilitating subsequent pretreatment.

[0052] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0053] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.

[0054] The working principle of this utility model is as follows:

[0055] In use, sulfuric acid waste gas enters the storage tank 3 through the gas delivery pipe 5 and flows upward. Simultaneously, the driving circulation pump 601 draws NaOH solution from inside the storage tank 3 through the extraction pipe 602. The NaOH solution flows through the drain pipe 603 into the annular pipe 604, and is then atomized and sprayed downward by multiple first atomizing nozzles 605 and second atomizing nozzles 606. This atomizes and sprays the solution into contact with the upward-flowing high-temperature waste gas. Upon contact, the droplets absorb heat and evaporate, lowering the temperature of the waste gas. Then, the NaOH solution neutralizes the acidic sulfur dioxide gas in the waste gas, achieving a pre-purification effect and reducing the acidity of the waste gas. At the same time, the liquid comes into contact with dust particles in the waste gas, utilizing the wetting and inertia of the droplets... The impact of the collision causes the dust particles to become heavier and settle. The settled dust falls into the storage tank 3 along with the NaOH solution. After falling into the storage tank 3, the NaOH solution can be recycled by the circulation pump 601. The pH sensor 804 can detect the pH value of the alkaline solution in real time. When the pH value is lower than the set threshold, that is, when the alkalinity is insufficient, the main controller drives the electric control valve 803 to open, so that the concentrated alkaline solution in the storage cone 801 is automatically replenished into the storage tank 3 to maintain the alkalinity concentration of the solution. Then, the pretreated waste gas enters the waste gas inlet pipe 4 through the waterproof and breathable membrane 608, and enters the acid washing tower body 1 for subsequent purification treatment.

[0056] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A waste gas treatment acid washing tower, characterized in that, include: The acid pickling tower body (1), the pretreatment heat dissipation tank (2) and the liquid storage tank (3) are connected. The pretreatment heat dissipation tank (2) is fixedly connected to the top of the liquid storage tank (3), and the interiors of the pretreatment heat dissipation tank (2) and the liquid storage tank (3) are connected. The interior of the liquid storage tank (3) is provided with an alkaline solution. The acid pickling tower body (1) and the pretreatment heat dissipation tank (2) are connected by a waste gas inlet pipe (4) through a flange and hexagonal bolts. The outer wall of the pretreatment heat dissipation tank (2) is connected by a gas transmission pipe (5) through a flange and hexagonal bolts. A circulating spray mechanism (6) is provided between the pretreatment heat dissipation tank (2) and the liquid storage tank (3), and the circulating spray mechanism (6) is used for the pretreatment of waste gas; The detection and replenishment mechanism (8) is located on the top of the storage tank (3) and is used for the detection and replenishment of the concentration of alkaline solution; The circulating spray mechanism (6) includes a circulating pump (601) fixedly connected to the outer wall of the storage tank (3). The inner wall of the storage tank (3) is fixedly connected to a suction pipe (602), and one end of the suction pipe (602) penetrates the inner wall of the storage tank (3) and is fixedly connected to the suction end of the circulating pump (601). The discharge end of the circulating pump (601) is fixedly connected to a drain pipe (603), and one end of the drain pipe (603) penetrates the outer wall of the pretreatment heat dissipation tank (2) and extends to its interior where a ring pipe (604) is fixedly connected. The bottom of the ring pipe (604) is fixedly connected to a plurality of first atomizing nozzles (605) and second atomizing nozzles (606), and the plurality of first atomizing nozzles (605) and second atomizing nozzles (606) are all located at the bottom of the exhaust gas inlet pipe (4). The inner wall of the exhaust gas inlet pipe (4) is fixedly connected to a waterproof and breathable membrane (608).

2. The waste gas treatment acid washing tower according to claim 1, characterized in that, The first atomizing nozzles (605) are all vertically arranged, and the second atomizing nozzles (606) are all inclined, with the inclination direction facing the center of the annular tube (604).

3. The waste gas treatment acid washing tower according to claim 1, characterized in that, The inner wall of the liquid storage tank (3) is fixedly connected with a dust filter (607), and the dust filter (607) is located on one side of the liquid extraction pipe (602).

4. The waste gas treatment acid washing tower according to claim 1, characterized in that, The top of the liquid storage tank (3) is chiseled with a rectangular opening, and the rectangular opening is connected to a sealing cover plate (7) by hexagonal bolts. The outer wall of the sealing cover plate (7) is in close contact with the inner wall of the rectangular opening.

5. The waste gas treatment acid washing tower according to claim 4, characterized in that, The detection and replenishment mechanism (8) includes a liquid storage cone (801), which contains a concentrated alkaline solution. The bottom end of the liquid storage cone (801) is fixedly connected to a connecting pipe (802), and the bottom end of the connecting pipe (802) is connected to the top end of the sealing cover (7). The connecting pipe (802) is in communication with the interior of the liquid storage tank (3), and an electric control valve (803) is fixedly connected to the outer wall of the connecting pipe (802). A pH sensor (804) is embedded in the top end of the sealing cover (7), and the probe of the pH sensor (804) is located inside the liquid storage tank (3). The pH sensor (804) is electrically connected to the electric control valve (803) through an external main controller.

6. The waste gas treatment acid washing tower according to claim 5, characterized in that, The top of the liquid storage cone (801) is open, and a sealing plug (805) is fitted on the top of the liquid storage cone (801). The outer wall of the sealing plug (805) is in close contact with the inner wall of the liquid storage cone (801).

7. The waste gas treatment acid washing tower according to claim 1, characterized in that, Multiple heat sinks (9) are fixedly connected to the outer wall of the liquid storage tank (3).

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