Wet deacidification system with deacidification agent preparation and supply mechanism

Abstract

The utility model relates to the technical field of flue gas wet treatment, in particular to a wet deacidification system with a deacidification agent preparation and supply mechanism, which comprises a wet washing tower, a dehumidification liquid circulation mechanism and a cooling liquid circulation mechanism, the dehumidification liquid circulation mechanism and the cooling liquid circulation mechanism are connected to the wet washing tower, and the wet washing tower is provided with a main flue for flue gas to enter. A flue gas-flue gas heat exchanger GGH is arranged on a flue gas pipeline between the main flue and the wet type washing tower, and a bypass flue used for being communicated with the flue gas-flue gas heat exchanger GGH is arranged on one side of the wet type washing tower; the caustic soda preparation and conveying mechanism is communicated with the cooling liquid circulating pump and the dehumidifying liquid circulating pump. The method has the effects of flexibly adjusting the concentration of the caustic soda solution and improving the deacidification efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas wet treatment, and particularly relates to a wet deacidification system with a deacidification agent preparation and supply mechanism. BACKGROUND

[0002] The wet deacidification system is an important environmental protection facility for purifying and treating flue gas generated by a household garbage incinerator, and can remove acid gases such as SOX and HCl in the flue gas.

[0003] In the related art, the wet deacidification system usually includes a wet scrubber, a circulating pump, a deacidification agent storage and conveying device, a flue gas heat exchanger and other related components. The flue gas enters the system through a draft fan, is pre-processed by the flue gas heat exchanger for heat exchange and cooling, and then enters the scrubber to fully contact and react with the circulating deacidification agent (such as lime slurry and other alkaline substances) to remove acid gases. The treated flue gas is subjected to post-processing such as demisting, and is then discharged through the draft fan.

[0004] Different garbage incineration conditions and flue gas acid gas concentrations may require different concentrations of caustic soda solution to achieve the best deacidification effect. In view of the related art described above, the wet deacidification system cannot flexibly adjust the concentration of the caustic soda solution according to actual needs, which may result in unstable deacidification efficiency or waste of deacidification agent. CONTENT OF THE INVENTION

[0005] In order to flexibly adjust the concentration of the caustic soda solution and improve the deacidification efficiency, the present application provides a wet deacidification system with a deacidification agent preparation and supply mechanism.

[0006] The wet deacidification system with a deacidification agent preparation and supply mechanism provided by the present application adopts the following technical solution:

[0007] A wet deacidification system with a deacidification agent preparation and supply mechanism, comprising a wet scrubber, a dehumidification liquid circulating mechanism and a cooling liquid circulating mechanism connected to the wet scrubber, the wet scrubber being provided with a main flue for flue gas to enter, a flue gas-flue gas heat exchanger GGH being arranged on a flue gas pipeline between the main flue and the wet scrubber, and the wet scrubber being provided with a bypass flue at one side for communication with the flue gas-flue gas heat exchanger GGH;

[0008] The wet scrubber has a dehumidification drainage port for connection with the dehumidification liquid circulating mechanism, and the dehumidification liquid circulating mechanism comprises a dehumidification water tank connected to the dehumidification drainage port and a dehumidification liquid circulating pump connected to the dehumidification water tank;

[0009] The cooling liquid circulating mechanism comprises a cooling liquid circulating pump and a cooling circulating water supply pipeline cooperating with the cooling liquid circulating pump and used for providing cooling water;

[0010] The caustic soda preparation and delivery mechanism is in communication with the cooling liquid circulating pump and the dehumidification liquid circulating pump.

[0011] By adopting the above technical solution, the caustic soda preparation and delivery mechanism can accurately prepare and deliver caustic soda solution of appropriate concentration according to different waste incineration conditions and flue gas acid gas concentration. Whether it is to respond to high-concentration acid gas emission scenarios that require high-concentration caustic soda solution for rapid reaction, or to use moderately diluted caustic soda solution in low-concentration acid gas cases to avoid waste and excessive reaction, the concentration of caustic soda solution can be accurately and flexibly adjusted. Because the optimal concentration of caustic soda solution can be provided according to actual needs, the reaction of caustic soda and acid gas in the wet scrubber is more complete and efficient. It can ensure that SOX, HCl and other acid gases in the flue gas are more completely absorbed and removed, improve the overall deacidification efficiency of the deacidification system, reduce the emission concentration of acid gases, and make it easier to meet strict environmental emission standards. The caustic soda preparation and delivery mechanism is in communication with the cooling liquid circulating pump and the dehumidification liquid circulating pump, so that the caustic soda solution can be reasonably integrated into the cooling liquid and dehumidification liquid circulation system. During the circulation process, the caustic soda solution is uniformly distributed and continuously in contact with the flue gas, ensuring the continuity and stability of the deacidification reaction.

[0012] Further, the caustic soda preparation and delivery mechanism includes a caustic soda storage tank for storing caustic soda solution, a caustic soda loading and unloading pump for transferring caustic soda solution from a tank truck to the caustic soda storage tank, a caustic soda dilution tank for diluting caustic soda solution, a caustic soda dilution pump for transferring caustic soda solution in the caustic soda storage tank to the caustic soda dilution tank, and a caustic soda delivery pump for transferring the diluted caustic soda solution to the wet scrubber.

[0013] By adopting the above technical solution, the caustic soda storage tank provides a dedicated storage place for caustic soda solution, and the caustic soda loading and unloading pump realizes efficient transfer from the tank truck to the caustic soda storage tank. The caustic soda dilution tank provides a specific space and conditions for dilution of caustic soda solution. By transferring the solution in the caustic soda storage tank to the dilution tank through the caustic soda dilution pump and adding an appropriate amount of diluent (such as water) according to the pre-set ratio, the final concentration of the caustic soda solution can be accurately controlled. When the concentration of acid gas in the flue gas changes during the operation of the waste incinerator, the concentration of the caustic soda solution in the caustic soda dilution tank can be quickly adjusted without the need for large-scale modification of the entire system or replacement of a large amount of deacidifying agent.

[0014] Further, the caustic soda dilution tank has a discharge port for discharging the diluted caustic soda solution, and the caustic soda delivery pump is connected to the discharge port through a pipeline.

[0015] By adopting the technical scheme, the dilute lye circulating pump is connected with the discharge port of the lye dilution tank, the dilute lye solution can be accurately delivered into the circulating system according to the real-time demand of the lye circulating system for the concentration and flow of the lye solution. The excessive or insufficient supply of the lye solution can be effectively avoided, the resources can be efficiently utilized, the lye can play the best effect in the deacidification process, and the removal efficiency of the acid gas is improved. When the waste incineration condition changes and the concentration of the acid gas in the flue gas changes, the concentration of the lye solution in the lye dilution tank can be conveniently adjusted, then the adjusted solution is rapidly delivered into the lye circulating system through the connection with the dilute lye circulating pump, so that the deacidification requirement under different conditions is met, and large-scale modification of the pipeline and equipment layout of the whole system is not needed.

[0016] Further, the upstream pipeline and the downstream pipeline of the lye loading and unloading pump are respectively provided with first and second ball valves for controlling start and stop and emergency cut-off, and a check valve is arranged between the lye loading and unloading pump and the second ball valve.

[0017] By adopting the technical scheme, the first and second ball valves are respectively arranged on the upstream and downstream pipelines of the lye loading and unloading pump, the start and stop process of the loading and unloading operation can be accurately controlled, and the accidental flow of the solution during non-operation is prevented. In an emergency, such as leakage, equipment failure or other safety hazards, the emergency cut-off of the fluid can be rapidly realized, and the risk and harm degree of the accident are reduced. The arrangement of the check valve avoids the backflow of the lye solution in the downstream pipeline to the loading and unloading pump, prevents the damage of the pump due to backflow, reduces the safety and operation problems caused by backflow, and improves the safety, reliability and stability of the whole lye loading and unloading link.

[0018] Further, the lye dilution tank is internally provided with a stirrer.

[0019] By adopting the technical scheme, the stirrer can rapidly and uniformly mix the lye solution and the diluent (such as water) added into the lye dilution tank, ensure that the concentration of the lye solution is consistent in the whole tank body, and accurately obtain the dilute lye concentration meeting the demand, thereby providing reliable guarantee for the subsequent stable and efficient deacidification reaction. Through the continuous stirring action, the local concentration of the lye in the dilution process can be effectively prevented from being too high or precipitation, the deacidification effect fluctuation caused by uneven concentration and the adverse effects such as corrosion and blockage of the conveying pipeline and related equipment caused by uneven concentration can be avoided, and the stability, reliability and effectiveness of the wet deacidification system operation are improved.

[0020] Further, the lye preparation and conveying mechanism further comprises a safety spray eye-washing device connected with the lye dilution tank and used for emergency rescue.

[0021] By adopting the technical scheme, the safety spray eye-washing device in the caustic soda preparation and conveying mechanism is connected with the caustic soda dilution tank. In the operation process of caustic soda storage, dilution and conveying, once caustic soda solution leakage, splashing and other accidents occur, especially when the eyes or other parts of the operator contact caustic soda solution, the safety spray eye-washing device can be started immediately to provide a large amount of clean water for rapid and continuous flushing of the contaminated part. The caustic soda solution is diluted and washed away in the first time, the corrosion and harm of caustic soda to human tissues are minimized, valuable time is saved for subsequent medical treatment, and the life safety and health of the operator are effectively guaranteed.

[0022] Further, the dehumidification liquid circulating pump and the wet scrubber are provided with a dehumidification liquid heat exchanger.

[0023] By adopting the technical scheme, the dehumidification liquid heat exchanger can adjust the temperature of the dehumidification liquid, optimize the dehumidification and acid gas absorption effect in the scrubber, and improve the stability and efficiency of the system for treating flue gas.

[0024] Further, the dehumidification water tank and the dehumidification liquid heat exchanger are provided with a dehumidification liquid pH buffer tank.

[0025] By adopting the above technical scheme, in the dehumidification liquid circulating system, the flow may fluctuate due to equipment start-stop or working condition change, which may cause instantaneous change of the concentration of acid-base substances in the dehumidification liquid. The dehumidification liquid pH buffer tank can be used as a buffer link to stabilize the pH value of the dehumidification liquid when the flow fluctuates, reduce the impact on the subsequent equipment, and improve the overall stability of the system.

[0026] In summary, the present application has the following at least one beneficial technical effect:

[0027] 1. The wet desulfurization system can accurately adjust the concentration of caustic soda solution according to the working condition and the concentration of acid gas, so that the reaction of caustic soda and acid gas in the scrubber is more efficient, the desulfurization efficiency is significantly improved, the emission concentration of acid gas is reduced to meet the environmental protection standard, and the continuity and stability of the desulfurization reaction are ensured by the cooperation of various components, ensuring the reliability and continuity of the system for treating flue gas;

[0028] 2. In the caustic soda loading and unloading link, the ball valve and the check valve cooperate to ensure accurate control and safety and stability of loading and unloading operation, prevent accidental flow and backflow, and the safety spray eye-washing device ensures personnel safety in case of accident. The dehumidification liquid heat exchanger, diaphragm pump and cooling liquid pH buffer tank etc. respectively reduce the risk of equipment failure from the aspects of adjusting temperature, stabilizing conveying, buffering pressure, controlling flow and stabilizing pH, prolong the service life of the equipment, reduce the risk of system operation, improve the overall stability and reliability, reduce downtime and maintenance cost;

[0029] 3. The components of the caustic soda preparation and delivery mechanism cooperate with each other to achieve flexible deployment and efficient transfer and storage of caustic soda solution, such as the caustic soda dilution tank which can quickly adjust the concentration according to the working condition, the butterfly valve which precisely controls the flow to adapt to the working condition change, and can be connected with the cooling liquid and dehumidification liquid circulating pumps, so that the caustic soda is reasonably integrated into the circulation system to adapt to different working conditions. The system layout and component design are convenient for operation and maintenance, and improve the adaptability and flexibility of the system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the overall structure schematic diagram of a wet deacidification system with a deacidification agent preparation and supply mechanism.

[0031] Figure 2 is the connection structure schematic diagram of a wet scrubbing tower and a flue gas-flue gas heat exchanger GGH in the present application.

[0032] Figure 3 is the connection structure schematic diagram of a wet scrubbing tower and a dehumidification liquid circulating mechanism in the present application.

[0033] Figure 4 is the connection structure schematic diagram of a wet scrubbing tower and a caustic soda preparation and delivery mechanism in the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, wet scrubbing tower; 11, main flue; 12, bypass flue; 13, dehumidification drainage port; 2, flue gas-flue gas heat exchanger GGH; 21, original flue gas inlet; 22, original flue gas outlet; 23, circulating flue gas inlet; 24, circulating flue gas outlet; 3, dehumidification liquid circulating mechanism; 31, dehumidification water tank; 32, dehumidification liquid circulating pump; 33, dehumidification liquid heat exchanger; 331, diaphragm pump; 34, dehumidification liquid pH buffer tank; 4, cooling liquid circulating mechanism; 41, cooling liquid circulating pump; 42, cooling circulating water supply pipeline; 43, cooling liquid pH buffer tank; 5, caustic soda preparation and delivery mechanism; 51, caustic soda storage tank; 52, caustic soda loading and unloading pump; 521, first ball valve; 522, second ball valve; 523, check valve; 53, caustic soda dilution tank; 531, discharge port; 532, stirrer; 54, caustic soda dilution pump; 55, caustic soda delivery pump; 551, cylinder operation valve; 552, flow meter; 553, regulating valve; 56, safety spray eye washing device; 6, incinerator; 7, induced draft fan; 8, sealing air SAN steam heater. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will combine the drawings of the present application with the embodiments to make further detailed description of the present application. Figures 1-4 and embodiments, the present application will be further described in detail.

[0036] The embodiments of the present application disclose a wet deacidification system with a deacidification agent preparation and supply mechanism. Referring to the drawings of the present application and the embodiments, the present application will be further described in detail. Figure 1 and embodiments, the present application will be further described in detail.Figure 2 The wet deacidification system with deacidification agent preparation and supply mechanism comprises a wet scrubber 1, a gas-gas heater GGH 2, a dehumidification liquid circulation mechanism 3, a cooling liquid circulation mechanism 4, and a caustic soda preparation and delivery mechanism 5.

[0037] The wet scrubber 1 has a main flue 11 arranged vertically above and a bypass flue 12 connected to the side wall. The gas-gas heater GGH 2 has a raw gas inlet 21 and a raw gas outlet 22 arranged at the upper and lower ends respectively, and a circulating gas inlet 23 and a circulating gas outlet 24 arranged at one side. The raw gas inlet 21 is connected to the flue gas outlet of the incinerator 6, the raw gas outlet 22 is connected to the bypass flue 12, the circulating gas inlet 23 is connected to the main flue 11, and the circulating gas outlet 24 is connected to the induced draft fan 7.

[0038] A sealing air (SAN) steam heater 8 is arranged in the pipeline between the raw gas inlet 21 and the flue gas outlet of the incinerator 6. When water vapor in the flue gas is directly discharged in a low temperature environment, a large amount of white smoke will be formed, affecting the visual effect and the surrounding environment. By increasing the flue gas temperature through the sealing air (SAN) steam heater 8, the water vapor is discharged in gaseous form, reducing the generation of white smoke and improving the appearance of the waste incineration plant. On the other hand, the sealing air (SAN) steam heater 8 can adjust the flue gas temperature to a suitable range, improve the chemical reaction rate of the pollutant removal process such as denitrification, and thus improve the removal efficiency of pollutants.

[0039] The wet scrubber 1 has a dehumidification drainage port 13 for connecting to the dehumidification liquid circulation mechanism 3, as shown in Figure 1 and Figure 3 The dehumidification liquid circulation mechanism 3 comprises a dehumidification water tank 31 connected to the dehumidification drainage port 13 and a dehumidification liquid circulation pump 32 connected to the dehumidification water tank 31. The cooling liquid circulation mechanism 4 comprises a cooling liquid circulation pump 41 and a cooling circulating water supply pipeline 42 cooperating with the cooling liquid circulation pump 41 and used for providing cooling water. In this embodiment, two groups of cooling liquid circulation pumps 41 are arranged in parallel, and each cooling liquid circulation pump 41 is connected to the cooling circulating water supply pipeline 42.

[0040] A coolant pH buffer tank 43 is installed in the circulation loop between the coolant circulation pump 41 and the wet scrubbing tower 1. During the waste incineration flue gas treatment process, acidic gases such as SO2 and HCl in the flue gas may dissolve in the coolant, causing the pH value of the coolant to decrease and the acidity to increase. At the same time, the addition of caustic soda solution as a deacidifying agent may also affect the pH value of the coolant. The buffering substance in the coolant pH buffer tank 43 can react with these acidic or alkaline substances to neutralize their effect on the pH value, keeping the pH value of the coolant within a relatively stable range. When the waste incineration conditions change, such as a sudden increase or decrease in the concentration of acidic gases in the flue gas, the pH value of the coolant may fluctuate significantly. The pH buffer tank can mitigate such rapid pH changes through its own buffering effect, avoiding serious corrosion or scaling problems caused by large pH fluctuations in the system equipment.

[0041] Reference Figure 3 In this embodiment, two sets of dehumidifying liquid circulation pumps 32 are connected in parallel, and each dehumidifying liquid circulation pump 32 is connected to the cooling circulating water supply pipeline 42. A dehumidifying liquid heat exchanger 33 with adjustable dehumidifying liquid temperature is installed in the circulation loop between the dehumidifying liquid circulation pump 32 and the wet scrubbing tower 1. A diaphragm pump 331 is installed between the dehumidifying liquid heat exchanger 33 and the dehumidifying liquid circulation pump 32 to buffer pressure and flow fluctuations, thereby preventing cavitation from damaging the circulation pump, flexibly controlling the flow rate, achieving flow matching with other parts of the system, and improving overall operating efficiency. A dehumidifying liquid pH buffer tank 34 is installed between the dehumidifying water tank 31 and the dehumidifying liquid heat exchanger 33. The dehumidifying liquid pH buffer tank 34 can effectively stabilize the pH value of the coolant, avoiding significant changes in the coolant pH due to factors such as fluctuations in flue gas composition and changes in the amount of caustic soda solution added.

[0042] Reference Figure 1 and Figure 4 The caustic soda preparation and conveying mechanism 5 is interconnected with both the coolant circulation pump 41 and the dehumidifying liquid circulation pump 32. The caustic soda preparation and conveying mechanism 5 includes a caustic soda storage tank 51 for holding the caustic soda solution, a caustic soda loading / unloading pump 52 for transferring the caustic soda solution from a tanker truck to the caustic soda storage tank 51, a caustic soda dilution tank 53 for diluting the caustic soda solution, a caustic soda dilution pump 54 for transferring the caustic soda solution from the caustic soda storage tank 51 to the caustic soda dilution tank 53, a caustic soda transfer pump 55 for transferring the diluted caustic soda solution to the wet scrubbing tower 1, and a safety spray and eyewash device 56 for emergency rescue. The caustic soda dilution tank 53 has a discharge port 531 for discharging the diluted caustic soda solution. The caustic soda transfer pump 55 is connected to the discharge port 531 via a pipeline. A cylinder-operated valve 551 for controlling the opening and closing of the discharge port 531 is installed on the pipeline between the caustic soda transfer pump 55 and the wet scrubbing tower 1. The safety spray and eyewash device 56 is connected to the caustic soda dilution tank 53.

[0043] In this embodiment, two caustic soda storage tanks 51 and two caustic soda dilution tanks 53 are provided, and each caustic soda dilution tank 53 is provided with a corresponding stirrer 532. Two groups of caustic soda loading and unloading pumps 52, caustic soda dilution pumps 54, and caustic soda delivery pumps 55 are provided in parallel. The upstream pipeline and the downstream pipeline of the caustic soda loading and unloading pump 52 are respectively provided with a first ball valve 521 and a second ball valve 522 for controlling start and stop and performing emergency shutdown, and a check valve 523 is provided between the caustic soda loading and unloading pump 52 and the second ball valve 522. A flow meter 552 and an adjusting valve 553 are provided between the caustic soda delivery pump 55 and the wet scrubber 1.

[0044] The implementation principle of the wet deacidification system with a deacidifying agent preparation and supply mechanism according to the embodiment of the application is as follows: the system includes a wet scrubber 1, a flue gas-flue gas heat exchanger GGH2, a dehumidification liquid circulation mechanism 3, a cooling liquid circulation mechanism 4, and a caustic soda preparation and delivery mechanism 5. After flue gas is discharged from the flue gas outlet of the incinerator 6, the flue gas first passes through the sealing air (SAN) steam heater 8 to increase the flue gas temperature, so as to reduce the generation of white smoke and improve the appearance by discharging water vapor in gaseous form, and to adjust the flue gas temperature to an appropriate range to improve the chemical reaction rate of the de-nitrogen and other pollutant removal processes and to improve the pollutant removal efficiency. Then, the original flue gas enters the original flue gas inlet 21 of the flue gas-flue gas heat exchanger GGH2, is connected to the bypass flue 12 of the wet scrubber 1 through the original flue gas outlet 22 of the flue gas-flue gas heat exchanger GGH2, and part of the circulating flue gas enters the circulating flue gas inlet 23 of the flue gas-flue gas heat exchanger GGH2 from the main flue 11 of the wet scrubber 1, and is then connected to the induced draft fan 7 from the circulating flue gas outlet 24.

[0045] The wet scrubber 1 is connected to the dehumidification liquid circulation mechanism 3 through the dehumidification drainage port 13, and the dehumidification liquid circulation mechanism 3 includes a dehumidification water tank 31, a dehumidification liquid circulation pump 32, etc. Two groups of dehumidification liquid circulation pumps 32 are provided in parallel and are connected to the cooling circulating water supply pipeline 42. A dehumidification liquid heat exchanger 33 is provided on the circulation loop between the dehumidification liquid circulation pump 32 and the wet scrubber 1 to adjust the dehumidification liquid temperature. A diaphragm pump 331 is also provided to buffer pressure and flow fluctuations to prevent cavitation damage to the circulation pump. A dehumidification liquid pH buffer tank 34 is provided between the dehumidification water tank 31 and the dehumidification liquid heat exchanger 33 to stabilize the cooling liquid pH value and avoid large changes in the pH value due to various factors.

[0046] The cooling liquid circulating mechanism 4 comprises a cooling liquid circulating pump 41 and a cooling circulating water supply pipeline 42, the cooling liquid circulating pump 41 is connected with the cooling circulating water supply pipeline 42 in parallel, and a cooling liquid pH buffer tank 43 is arranged on the circulating loop between the cooling liquid circulating pump 41 and the wet scrubber 1. The pH value of the cooling liquid can be changed due to the influence of the acid gas in the waste incineration flue gas and the addition of the caustic soda solution. The buffer material in the buffer tank can react with the related acid or alkaline substances to neutralize the influence on the pH value, so as to slow down the sharp change of the pH value when the waste incineration condition changes, and avoid the corrosion or fouling problems of the system equipment.

[0047] The caustic soda preparation and conveying mechanism 5 is connected with the cooling liquid circulating pump 41 and the dehumidification liquid circulating pump 32, and comprises a caustic soda storage tank 51, a caustic soda loading and unloading pump 52, a caustic soda dilution tank 53, a caustic soda dilution pump 54, a caustic soda conveying pump 55, and a safety spray eye washing device 56. The caustic soda solution is transferred from the tank truck to the caustic soda storage tank 51 through the caustic soda loading and unloading pump 52, and then is transferred to the caustic soda dilution tank 53 for dilution through the caustic soda dilution pump 54. The diluted caustic soda solution is conveyed to the wet scrubber 1 through the pipeline provided with a cylinder operation valve 551, a flow meter 552 and an adjusting valve 553, etc. by the caustic soda conveying pump 55. The caustic soda storage tank 51 and the caustic soda dilution tank 53 are both provided with two tanks, and the latter has an agitator 532. Multiple key pumps are provided in parallel in two groups, and the caustic soda loading and unloading pump 52 is provided with related control and stop valves upstream and downstream to ensure operation and safety.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A wet deacidification system with deacidifying agent preparation and supply mechanism, characterized by: The wet scrubber (1) is provided with a main flue (11) for the flue gas to enter, and a bypass flue (12) is arranged on one side of the wet scrubber (1) to communicate with the gas-gas heat exchanger (GGH) (2). The wet scrubber (1) is provided with a dehumidification drainage port (13) for connecting with the dehumidification liquid circulating mechanism (3), and the dehumidification liquid circulating mechanism (3) comprises a dehumidification water tank (31) connected to the dehumidification drainage port (13) and a dehumidification liquid circulating pump (32) connected to the dehumidification water tank (31). The cooling liquid circulating mechanism (4) comprises a cooling liquid circulating pump (41) and a cooling circulating water supply pipeline (42) matched with the cooling liquid circulating pump (41) and used for providing cooling water. The caustic soda preparation and delivery mechanism (5) comprises a caustic soda storage tank (51) for storing caustic soda solution, a caustic soda loading and unloading pump (52) for transferring caustic soda solution from a tank car to the caustic soda storage tank (51), a caustic soda dilution tank (53) for diluting caustic soda solution, a caustic soda dilution pump (54) for transferring caustic soda solution in the caustic soda storage tank (51) to the caustic soda dilution tank (53), and a caustic soda delivery pump (55) for transferring the diluted caustic soda solution to the wet scrubber (1).

2. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 1, characterized in that: The caustic soda dilution tank (53) has a discharge port (531) for discharging the diluted caustic soda solution, and the caustic soda delivery pump (55) is connected to the discharge port (531) through a pipeline.

3. A wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 2, characterized in that: The upstream pipeline and the downstream pipeline of the caustic soda loading and unloading pump (52) are respectively provided with a first ball valve (521) and a second ball valve (522) for controlling start and stop and emergency shutdown, and a check valve (523) is arranged between the caustic soda loading and unloading pump (52) and the second ball valve (522).

4. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 2, characterized in that: The caustic soda dilution tank (53) is provided with an internal agitator (532).

5. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 2, characterized in that: The caustic soda preparation and delivery mechanism (5) further comprises a safety shower and eye washing device (56) connected to the caustic soda dilution tank (53) and used for emergency rescue.

6. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 2, characterized in that: A dehumidification liquid heat exchanger (33) is arranged between the dehumidification liquid circulating pump (32) and the wet scrubber (1), and a diaphragm pump (331) is arranged between the dehumidification liquid heat exchanger (33) and the dehumidification liquid circulating pump (32).

7. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 1, characterized in that: A dehumidification liquid pH buffer tank (34) is arranged between the dehumidification water tank (31) and the dehumidification liquid heat exchanger (33).

8. The wet deacidification system with deacidifying agent preparation and supply mechanism according to claim 7, characterized in that: ​

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