Acid mist diffusion and neutralization system and use method and mixed acid vehicle

Abstract

The present invention discloses an acid mist diffusion prevention neutralization system and a use method and a mixed acid vehicle, and relates to the technical field of acid mist prevention and control. The system includes an acid mist detection and collection module, a neutralization module, and an overflow processing module; the acid mist detection and collection module includes an acid mist collection pipeline and an acid mist sensor; the neutralization module includes a neutralization tank and an alkali liquid tank; and the overflow processing module includes an overflow tank. When the neutralization tank is full and there is no discharge condition during use, the liquid in the neutralization tank enters the overflow tank. If the pH value of the liquid in the overflow tank is less than 7, the liquid is sent to the mixed acid tank through the total return pipeline and the reflux pipeline. If the pH value of the liquid in the overflow tank is greater than or equal to 7, the liquid is sent to the alkali liquid tank for recovery through the total return pipeline and the recovery pipeline. After the mixed acid vehicle of the present invention is started, the system can automatically neutralize the acid mist and stop working, ensuring that no acid smoke overflows at the acid preparation site, and ensuring that the on-site safety and environmental protection operations meet the standards.

Description

Technical Field

[0001] The invention relates to the technical field of acid mist prevention and control, in particular to an acid mist diffusion prevention and neutralization system and a use method and an acid mixing vehicle. Background Art

[0002] A large amount of acid mist will be generated during the preparation and placement of the acid solution. The spread of the acid mist will cause environmental pollution. At the same time, the fracturing operation area cannot be far away from the operation area. Therefore, an acid mist prevention and control equipment is needed to monitor and treat the acid mist generated during the preparation of the acid solution and the acid mist generated during the placement of the finished acid, so as to achieve an effective neutralization effect.

[0003] Publication number: CN117883948A, discloses an acid mist purification system, including a liquid accumulation circulation pool, an acid mist purification tower, a gas-liquid separator, a pipeline demister, an induced draft fan, a number of pipelines, a liquid discharge port, an acid mist air inlet, and an acid mist feed pipe; the liquid accumulation circulation pool is provided with an absorption liquid pipeline; the top of the acid mist purification tower is connected to the bottom of the gas-liquid separator through a pipeline; the top of the gas-liquid separator is connected to the induced draft fan through a pipeline. However, the patent has a large volume and low acid mist neutralization efficiency, and is mainly aimed at the neutralization of nitric acid mist, and the neutralization efficiency for acid mist such as hydrochloric acid is not high.

[0004] Announcement No.: CN207153455U discloses an acid mist removal system, which is composed of a mixed acid system, a spray system and a neutralization system to remove acid mist during the operation.

[0005] Announcement No.: CN220546784U, discloses an acid mist neutralization and purification treatment device, which sends the acid mist to alkaline solution at different depths. At the same time, the vertical movement of the acid delivery pipe can stir the flow of the alkaline solution, accelerate the flow of the alkaline solution, and quickly replenish the alkaline substances near the acid delivery pipe, thereby ensuring that the alkaline substances in the alkaline solution are evenly consumed during the neutralization process, ensuring the neutralization effect, and improving the treatment effect of the acid mist.

[0006] The above-mentioned prior arts are unable to cope with the emergencies that the neutralization tank is full and cannot be discharged and the alkali material is insufficient.

[0007] In summary, the technical solutions of the above-disclosed technologies, the technical problems to be solved, and the beneficial effects produced are all different from the present invention. Regarding more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the invention

[0008] In view of the above-mentioned defects in the prior art, the object of the present invention is to provide an acid mist diffusion-proof neutralization system and a use method and an acid mixing vehicle.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] On the one hand, the present invention provides an acid mist diffusion prevention and neutralization system, comprising an acid mist detection and collection module, a neutralization module, and an overflow processing module; the acid mist detection and collection module comprises an acid mist collection pipeline and an acid mist sensor; the acid mist collection pipeline is connected to an acid mist generating tank through an acid mist collection unit, and the acid mist sensor is arranged on the top of the inner cavity of the acid mist generating tank; the neutralization module comprises a neutralization tank and an alkali liquid tank; the bottom of the alkali liquid tank is connected to the top of the neutralization tank through an infusion pipeline; the acid mist collection pipeline ... The neutralization pipeline and the acid-dissolving pipeline are connected to the neutralization tank, the neutralization pipeline is below the acid-dissolving pipeline, and an internal pH sensor is arranged in the neutralization tank; the overflow processing module includes an overflow tank; the top of the overflow tank is connected to the side wall of the neutralization tank through the overflow pipeline; a total return pipeline is arranged at the bottom of the overflow tank, the total return pipeline is connected to the alkali liquid tank through the recovery pipeline, and the total return pipeline is connected to the acid mist generating tank through the reflux pipeline; a fourth pH sensor is arranged in the overflow tank beside the total return pipeline port.

[0011] Further, the acid mist collection unit comprises a negative pressure generator and a first control valve connected in sequence, wherein the first control valve is close to the acid mist generating tank;

[0012] Specifically, when at least two acid mist collecting units are provided, an acid mist sensor is provided between every two acid mist collecting units.

[0013] Furthermore, the neutralization tank is provided with a stirring device, the connection port between the acid-dissolving pipeline and the neutralization tank is located above the turbulent component in the stirring device, and the connection port between the overflow pipeline and the neutralization tank is located above the acid-dissolving pipeline port in the neutralization tank.

[0014] Further, the internal pH sensor includes a first pH sensor and a second pH sensor;

[0015] Specifically, the first pH sensor is arranged in the projection area of ​​the spoiler component in the stirring device on the side wall of the neutralization tank, and the second pH sensor is arranged between the overflow pipeline outlet on the neutralization tank and the uppermost stirring blade.

[0016] Furthermore, the acid dissolving pipeline is provided with a second control valve and a first one-way valve in sequence; the neutralizing pipeline is provided with a third control valve and a second one-way valve in sequence; the infusion pipeline is provided with a first liquid pump and a fifth control valve in sequence; the total return pipeline is provided with a sixth control valve and a second liquid pump in sequence;

[0017] Specifically, the reflux pipeline is provided with a seventh control valve; and the recovery pipeline is provided with an eighth control valve.

[0018] Furthermore, the first liquid pump and the second liquid pump are both metering pumps;

[0019] Specifically, a feeding port is arranged at the top of the alkali liquid tank, and a third pH sensor is arranged at the bottom of the inner cavity of the alkali liquid tank.

[0020] Furthermore, the first one-way valve is close to the neutralization tank; the second one-way valve is close to the neutralization tank; the fifth control valve is close to the alkali liquid tank; the sixth control valve is close to the overflow tank; a discharge pipeline is set at the bottom of the neutralization tank; and a fourth control valve is set on the discharge pipeline.

[0021] In a second aspect, the present invention provides an acid mixing vehicle, including an acid mixing vehicle, wherein the acid mixing vehicle is provided with an acid mixing tank, and the acid mixing vehicle is provided with an acid mist diffusion prevention and neutralization system as described in the first aspect, wherein the acid mixing tank is an acid mist generating tank.

[0022] In a third aspect, the present invention provides a method for using an acid mist diffusion and neutralization system in a mixed acid vehicle, using the mixed acid vehicle described in the second aspect, comprising the following steps:

[0023] S1. Alkaline solution is prepared in an alkali solution tank; when the acid mixing vehicle starts to prepare the acid solution, after the acid mist sensor detects that the acid mist concentration is greater than 0, the acid mist collection unit starts to work to collect the acid mist, and collects it through the acid mist collection pipeline;

[0024] S2, the acid mist collection pipeline introduces the acid mist into the neutralization tank through the neutralization pipeline. At this time, the acid solution pipeline is closed, and the infusion pipeline sends the alkaline solution in the alkali solution tank into the neutralization tank. The acid mist reacts with the alkali solution in the neutralization tank. The internal pH sensor monitors the pH value in the neutralization tank in real time. When the pH value drops to the set value, an alarm will be issued to prompt the addition of alkaline solution;

[0025] S3. When the neutralization tank is full and there is no discharge condition, the liquid in the neutralization tank enters the overflow tank. According to the value of the fourth pH sensor, if the pH value of the liquid in the overflow tank is less than 7, the liquid is sent to the mixed acid tank through the total return pipeline and the reflux pipeline. If the pH value of the liquid in the overflow tank is ≥7, the liquid is sent to the alkali liquid tank for recovery through the total return pipeline and the recovery pipeline.

[0026] In S3, during operation, the liquid level of the alkali liquid tank is known according to the amount of clean water added, the metering of the first liquid pump, and the metering of the second liquid pump. When the alkali solution in the alkali liquid tank is insufficient, a certain amount of alkali material and clean water are added to the alkali liquid tank; if the alkali material is exhausted, only clean water is added. At this time, the detection value of the third pH sensor suddenly changes to 7. After the sudden change occurs, the neutralization pipeline is closed and the acid dissolution pipeline is opened. After the acid mist enters the neutralization tank, it enters the overflow tank together with the liquid, and then is sent to the mixed acid tank through the total return pipeline and the reflux pipeline. During this period, the infusion pipeline provides clean water to the neutralization tank to ensure liquid flow and avoid excessive acid concentration.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention can cope with emergencies such as a full neutralization tank and insufficient alkali material, and has higher safety compared with the prior art.

[0029] 2. After the acid mixing vehicle is started, the system of the present invention can automatically neutralize the acid mist and stop working, ensuring that no acid smoke overflows at the acid liquid preparation site, ensuring that the on-site safety and environmental protection operations meet the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an acid mist diffusion and neutralization system of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the negative pressure generator in the present invention.

[0032] In the figure: 1, acid mist generating tank; 1.1, first liquid level gauge; 1.2, second liquid level gauge; 1.3, acid mist sensor; 1.4, breathing valve; 2, neutralizing tank; 2.1, transmission shaft; 2.2, first pH sensor; 2.3, second pH sensor; 3, alkali liquid tank; 3.1, feeding port; 3.2, third pH sensor; 4, overflow tank; 4.1, fourth pH sensor; 5, negative pressure generator; 5.1, stator shell; 5.2, coil assembly; 5.3, rotor shell; 5.4, magnet; 5.5, center rod; 5.6, fan blade; 5.7, lower joint; 5.8, upper joint;

[0033] F1, first control valve; F2, second control valve; F3, third control valve; F4, fourth control valve; F5, fifth control valve; F6, sixth control valve; F7, seventh control valve; F8, eighth control valve; D1, first one-way valve; D2, second one-way valve; B1, first liquid pump; B2, second liquid pump. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0035] See also Figure 1 The present invention provides an acid mist diffusion prevention and neutralization system, which includes an acid mist detection and collection module, a neutralization module, and an overflow processing module.

[0036] The acid mist detection and collection module includes an acid mist collection pipeline and an acid mist sensor 1.3. The acid mist collection pipeline is connected to the acid mist generating tank 1 through an acid mist collection unit. The acid mist collection unit includes a negative pressure generator 5 and a first control valve F1 connected in sequence. The first control valve F1 is close to the acid mist generating tank 1. The acid mist sensor 1.3 is arranged on the top of the inner cavity of the acid mist generating tank 1.

[0037] The acid mist sensor 1.3 can measure the concentration of the acid mist gas, and the negative pressure generator 5 can generate negative pressure to suck in the acid mist when the first control valve F1 is opened.

[0038] Specifically, when at least two acid mist collecting units are provided, an acid mist sensor 1.3 is provided between every two acid mist collecting units, so as to accurately collect the acid mist gas in the acid mist generating tank 1.

[0039] The neutralization module includes a neutralization tank 2 and an alkali liquid tank 3. The bottom of the alkali liquid tank 3 is connected to the top of the neutralization tank 2 through an infusion pipeline. The acid mist collection pipeline is connected to the neutralization tank 2 through a neutralization pipeline and an acid-dissolving pipeline respectively. The neutralization pipeline is below the acid-dissolving pipeline. The neutralization tank 2 is provided with a stirring device. A pH sensor is provided in the neutralization tank 2. A discharge pipeline is provided at the bottom of the neutralization tank 2. A feeding port 3.1 is provided at the top of the alkali liquid tank 3 for preparing alkali liquid. A third pH sensor 3.2 is provided at the bottom of the inner cavity of the alkali liquid tank 3 for indicating the concentration of the alkali liquid.

[0040] The overflow treatment module includes an overflow tank 4, the top of which is connected to the side wall of the neutralization tank 2 through an overflow pipeline, a total return pipeline is arranged at the bottom of the overflow tank 4, the total return pipeline is connected to the alkali liquid tank 3 through a recovery pipeline, the total return pipeline is connected to the acid mist generating tank 1 through a reflux pipeline, and a fourth pH sensor 4.1 is arranged in the overflow tank 4 next to the total return pipeline outlet.

[0041] The stirring device includes a driver and a transmission shaft 2.1. The driver is arranged on the top of the outer wall of the neutralization tank 2. The transmission shaft 2.1 is connected to the driver inside the neutralization tank 2. The transmission shaft 2.1 is provided with at least two and at least one layer of blades, and the blades are spoiler components.

[0042] Specifically, the connection port between the acid-soluble pipeline and the neutralization tank 2 is located above the uppermost blade, and the connection port between the overflow pipeline and the neutralization tank 2 is located above the acid-soluble pipeline in the neutralization tank 2; in this way, when the liquid level in the neutralization tank 2 reaches the overflow height and the stirring assembly stops, the neutralization pipeline is closed and the acid-soluble pipeline is activated, and the acid mist enters the neutralization tank 2 from the acid-soluble pipeline, the acid mist dissolves in the liquid, and enters the overflow tank 4 in a laminar flow manner, thereby avoiding interference of the blades with the liquid flow.

[0043] Specifically, the acid dissolving pipeline is provided with a second control valve F2 and a first one-way valve D1 in sequence, and the first one-way valve D1 is close to the neutralization tank 2; the neutralization pipeline is provided with a third control valve F3 and a second one-way valve D2 in sequence, and the second one-way valve D2 is close to the neutralization tank 2. The second control valve F2 is used to control the opening and closing of the acid dissolving pipeline, and the third control valve F3 is used to control the opening and closing of the neutralization pipeline; the first one-way valve D1 and the second one-way valve D2 prevent the liquid from flowing back into the pipeline, and the first one-way valve D1 and the second one-way valve D2 are opened by the air pressure generated by the negative pressure generator 5, and the valve balls of the first one-way valve D1 and the second one-way valve D2 are made of ceramics, which are corrosion-resistant and have a long service life.

[0044] Specifically, the infusion pipeline is provided with a first liquid pump B1 and a fifth control valve F5 in sequence. The fifth control valve F5 is close to the alkali liquid tank 3 , and the fifth control valve F5 controls the opening and closing of the infusion pipeline.

[0045] Specifically, the pH sensor in the neutralization tank 2 includes a first pH sensor 2.2 and a second pH sensor 2.3. The first pH sensor 2.2 is arranged in the projection area of ​​the stirring blade on the side wall of the neutralization tank 2, and the second pH sensor 2.3 is arranged between the overflow pipeline outlet on the neutralization tank 2 and the uppermost stirring blade.

[0046] Specifically, a fourth control valve F4 is provided on the discharge pipeline, and the fourth control valve F4 controls the opening and closing of the discharge pipeline.

[0047] Specifically, a sixth control valve F6 and a second liquid pump B2 are sequentially arranged on the total return pipeline, and the sixth control valve F6 is close to the overflow tank 4; a seventh control valve F7 is arranged on the return pipeline; and an eighth control valve F8 is arranged on the recovery pipeline; wherein, the sixth control valve F6 controls the opening and closing of the total return pipeline, the seventh control valve F7 controls the opening and closing of the return pipeline, and the eighth control valve F8 controls the opening and closing of the recovery pipeline.

[0048] Specifically, the first liquid pump B1 and the second liquid pump B2 are both metering pumps, which is convenient for controlling the liquid volume in the alkali liquid tank 3; the control valve, liquid pump, and driver are all pneumatic or electric, which is convenient for driving with a single power device; the acid mist generating tank 1 is provided with a breathing valve 1.4, and the neutralization tank 2, alkali liquid tank 3, and overflow tank 4 are also provided with breathing holes for balancing the air pressure. Example 2

[0049] Based on Example 1, this example applies an acid mist diffusion prevention and neutralization system to a mixed acid vehicle, wherein the mixed acid vehicle comprises a mixed acid tank, which is an acid mist generating tank 1. The control panel of the mixed acid vehicle is connected to all control valves, sensors, and liquid pumps, and can control and display their operating status.

[0050] A first liquid level gauge 1.1 is arranged at the front end of the upper wall of the inner cavity of the mixed acid tank, and a second liquid level gauge 1.2 is arranged at the rear end of the upper wall of the inner cavity of the mixed acid tank. The first liquid level gauge 1.1 and the second liquid level gauge 1.2 are radar level gauges. The two are arranged to facilitate the control of the liquid level in the mixed acid tank when the mixed acid vehicle is tilted, and the radar level gauge is used to control the working displacement of the suction pump of the mixed acid vehicle to avoid overflow of acid liquid and prevent acid liquid from invading the collector.

[0051] It should be noted that the acid mixing vehicle and its acid mixing tank and control panel are prior art, and their structures are clear to those skilled in the art.

[0052] A method for using an acid mist diffusion and neutralization system in a mixed acid vehicle:

[0053] S1, add a certain amount of NaOH and clean water to the alkali solution tank 3 to prepare a 2%-5% NaOH aqueous solution;

[0054] When the acid mixing vehicle starts to configure the acid solution, after the acid mist sensor detects that the acid mist concentration is greater than 0, the negative pressure generator 5 on the mixing tank starts to work to collect the acid mist. After the negative pressure generator 5 starts to work, the first control valve F1 generates negative pressure to suck the acid mist within 1m into the negative pressure generator 5, and collects it through the acid mist collection pipeline; the number of negative pressure generators 5 matches the situation of the tank, with a surplus amount to ensure the collection effect;

[0055] S2, the acid mist collection pipeline introduces the acid mist into the neutralization tank 2 through the neutralization pipeline. At this time, the acid solution pipeline is closed, and the infusion pipeline pumps the alkali solution in the alkali solution tank 3 into the neutralization tank 2. The acid mist reacts with the alkali solution in the neutralization tank 2, NaOH+HCL=NaCL+H2O, and becomes a salt solution, thereby achieving the purpose of neutralizing the acid mist; the stirring component is started to speed up the reaction speed, and the first pH sensor 2.2 monitors the pH value in the neutralization tank 2 in real time. When the pH value drops to the set value, an alarm will be issued to prompt the addition of the NaOH aqueous solution to ensure that the acid mist can be effectively neutralized;

[0056] S3, when the neutralization tank 2 is full and there is no discharge condition, the liquid in the neutralization tank 2 enters the overflow tank 4, and the overflow tank 4 is based on the value of the fourth pH sensor 4.1. If the pH value of the liquid in the overflow tank 4 is less than 7, the liquid is pumped to the mixed acid tank through the total return pipeline and the reflux pipeline. If the pH value of the liquid in the overflow tank 4 is ≥7, the liquid is pumped to the alkali liquid tank 3 through the total return pipeline and the recovery pipeline for recovery. When the second liquid pump B2 is working, the detection value of the three pH sensors 3.2 approaches 7, and the opening and closing of the neutralization pipeline and the acid-soluble pipeline are not switched;

[0057] During operation, the liquid level of the alkali liquid tank 3 is known according to the amount of clean water added, the metering of the first liquid pump B1 and the second liquid pump B2. When the alkali solution in the alkali liquid tank 3 is insufficient, a certain amount of NaOH and clean water are added to the alkali liquid tank 3; if the alkali material is exhausted, only clean water is added. At this time, the detection value of the third pH sensor 3.2 suddenly changes to 7. After the sudden change occurs, the neutralization pipeline is closed and the acid dissolution pipeline is opened. After the acid mist enters the neutralization tank 2, it enters the overflow tank 4 together with the liquid, and then is pumped to the mixed acid tank through the total return pipeline and the reflux pipeline. During this period, the infusion pipeline provides clean water to the neutralization tank 2 to ensure liquid flow and avoid excessive acid concentration in the neutralization tank 2. Example 3

[0058] like Figure 2 As shown, this embodiment provides a specific structure of a negative pressure generator 5.

[0059] The negative pressure generator 5 includes a stator and a rotor.

[0060] The stator comprises a stator shell 5.1, which is in a hollow ring shape. A coil group 5.2 is arranged inside the stator shell 5.1. An upper joint 5.8 is arranged at the upper end of the inner ring wall of the stator shell 5.1, and a lower joint 5.7 is arranged at the lower end of the inner ring wall of the stator shell 5.1. A step is arranged between the lower joint 5.7 and the inner ring wall of the stator shell 5.1.

[0061] The rotor includes a rotor shell 5.3, which is in a ring shape. A magnet 5.4 is embedded in the outer wall of the rotor shell 5.3. A center rod 5.5 is arranged at the center of the inner wall of the rotor shell 5.3. Fan blades 5.6 are arranged between the center rod 5.5 and the inner wall of the rotor shell 5.3. The rotor shell 5.3, the center rod 5.5 and the fan blades 5.6 are made as one piece, and the rotor shell 5.3 is placed on a step.

[0062] The rotor is driven to rotate through the action of the coil assembly 5.2 and the magnet 5.4.

[0063] Among them, the outer walls of the rotor shell 5.3, the center rod 5.5, the fan blades 5.6, and the magnet 5.4 are electroplated or sprayed with anti-corrosion materials to increase the service life.

[0064] Among them, the lower end surface of the rotor shell 5.3 is a frosted surface, which contacts the step through the lubricating oil. The frosted surface has a good oil storage capacity and can maintain lubrication performance for a long time.

[0065] The lower joint 5.7 is an external threaded joint, and the upper joint 5.8 is an internal threaded joint, so that the end face of the connected pipeline can limit the rotor so that the rotor is within the influence range of the coil group 5.2.

[0066] All components and connection methods of components not discussed in this application belong to the known technologies in this technical field and can be directly applied without further explanation.

[0067] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0068] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0069] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acid mist diffusion prevention and neutralization system, comprising an acid mist detection and collection module and a neutralization module, characterized in that: Also included is an overflow treatment module; The acid mist detection and collection module includes an acid mist collection pipeline and an acid mist sensor; the acid mist collection pipeline is connected to the acid mist generating tank through an acid mist collecting unit, and the acid mist sensor is arranged on the top of the inner cavity of the acid mist generating tank; The neutralization module includes a neutralization tank and an alkali liquid tank; the bottom of the alkali liquid tank is connected to the top of the neutralization tank through a liquid infusion line; the acid mist collection line is connected to the neutralization tank through a neutralization line and an acid-dissolving line, respectively, the neutralization line is below the acid-dissolving line, and an internal pH sensor is provided in the neutralization tank; The overflow treatment module includes an overflow tank; the top of the overflow tank is connected to the side wall of the neutralization tank through an overflow pipeline; a total return pipeline is arranged at the bottom of the overflow tank, the total return pipeline is connected to the alkali liquid tank through a recovery pipeline, and the total return pipeline is connected to the acid mist generating tank through a reflux pipeline; a fourth pH sensor is arranged next to the total return pipeline mouth in the overflow tank.

2. The acid mist diffusion and neutralization system according to claim 1, characterized in that: The acid mist collection unit comprises a negative pressure generator and a first control valve connected in sequence, wherein the first control valve is close to the acid mist generating tank; When at least two acid mist collecting units are provided, an acid mist sensor is provided between every two acid mist collecting units.

3. The acid mist diffusion and neutralization system according to claim 1, characterized in that: The neutralization tank is provided with a stirring device, the connection port of the acid dissolving pipeline and the neutralization tank is located above the turbulent component in the stirring device, and the connection port of the overflow pipeline and the neutralization tank is located above the acid dissolving pipeline port in the neutralization tank.

4. The acid mist diffusion and neutralization system according to claim 3, characterized in that: The internal pH sensor includes a first pH sensor and a second pH sensor; The first pH sensor is arranged in the projection area of ​​the spoiler component in the stirring device on the side wall of the neutralization tank, and the second pH sensor is arranged between the overflow pipeline outlet on the neutralization tank and the uppermost stirring blade.

5. The acid mist diffusion and neutralization system according to claim 1, characterized in that: The acid dissolving pipeline is provided with a second control valve and a first one-way valve in sequence; A third control valve and a second one-way valve are sequentially arranged on the neutralization pipeline; The infusion pipeline is provided with a first liquid pump and a fifth control valve in sequence; The total return pipeline is provided with a sixth control valve and a second liquid pump in sequence; The return line is provided with a seventh control valve; The recovery line is provided with an eighth control valve.

6. The acid mist diffusion and neutralization system according to claim 5, characterized in that: The first liquid pump and the second liquid pump are both metering pumps; A feeding port is arranged on the top of the alkali liquid tank, and a third pH sensor is arranged on the bottom of the inner cavity of the alkali liquid tank.

7. The acid mist diffusion and neutralization system according to claim 5, characterized in that: The first one-way valve is close to the neutralization tank; The second one-way valve is close to the neutralization tank; The fifth control valve is close to the alkali liquid tank; The sixth control valve is close to the overflow tank; A discharge pipeline is arranged at the bottom of the neutralization tank; a fourth control valve is arranged on the discharge pipeline.

8. An acid mixing vehicle, comprising an acid mixing vehicle, wherein the acid mixing vehicle is provided with an acid mixing tank, wherein the acid mixing vehicle is provided with an acid mist diffusion prevention and neutralization system as claimed in claim 6, and the acid mixing tank is an acid mist generating tank.

9. A method for using an acid mist diffusion and neutralization system in a mixed acid vehicle, characterized in that: Using the mixed acid vehicle according to claim 8 comprises the following steps: S1. Add a certain amount of alkali material and clean water to the alkali liquid tank to prepare an alkali solution in the alkali liquid tank; when the acid mixing vehicle starts to prepare the acid solution, the acid mist sensor detects that the acid mist concentration is greater than 0, and the acid mist collection unit starts to work to collect the acid mist, and collects it through the acid mist collection pipeline; S2, the acid mist collection pipeline introduces the acid mist into the neutralization tank through the neutralization pipeline. At this time, the acid dissolving pipeline is closed, and the infusion pipeline sends the alkaline solution in the alkali solution tank into the neutralization tank. The acid mist reacts with the alkaline solution in the neutralization tank. The internal pH sensor monitors the pH value in the neutralization tank in real time. When the pH value drops to the set value, an alarm will be issued to prompt the addition of alkaline solution; S3. When the neutralization tank is full and there is no discharge condition, the liquid in the neutralization tank enters the overflow tank. According to the value of the fourth pH sensor, if the pH value of the liquid in the overflow tank is less than 7, the liquid is sent to the mixed acid tank through the total return pipeline and the reflux pipeline. If the pH value of the liquid in the overflow tank is ≥7, the liquid is sent to the alkali liquid tank for recovery through the total return pipeline and the recovery pipeline.

10. The method for using the acid mist diffusion and neutralization system in a mixed acid vehicle according to claim 9, characterized in that: In S3, during operation, the liquid level of the alkali liquid tank is known according to the amount of clean water added, the measurement of the first liquid pump, and the measurement of the second liquid pump. When the alkali solution in the alkali liquid tank is insufficient, a quantitative alkali material and clean water are added to the alkali liquid tank; If the alkali material is exhausted, only clean water is added. At this time, the detection value of the third pH sensor suddenly changes to 7. After the sudden change occurs, the neutralization pipeline is closed and the acid dissolving pipeline is opened. The acid mist enters the neutralization tank and enters the overflow tank together with the liquid, and then is sent to the mixed acid tank through the total return pipeline and the reflux pipeline. During this period, the infusion pipeline provides clean water to the neutralization tank to ensure liquid flow and avoid excessive acid concentration in the neutralization tank.

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