Tail water alkalization adjusting device and adjusting method based on multi-stage reaction tank

Abstract

The invention discloses a tail water alkalization adjusting device and adjusting method based on a multistage reaction tank. The device comprises a tail water input pipe, an alkalization dissolving tank, an alkali liquor storage tank, a pH regulation reaction tank and a control system. The method comprises the following steps: firstly, respectively inputting tail water to be treated into an alkalization dissolving tank and a pH regulation reaction tank through a tail water input pipe; one part of tail water to be treated is used as a solvent of an alkalizer, and an alkalization dissolution control box is used for controlling the dissolution degree of the alkalizer in an alkalization dissolution tank to obtain alkali liquor; alkali liquor is stored in the alkali liquor storage tank, the alkali liquor is added into the pH adjusting reaction tank through the pH adjusting and alkali liquor storage control box, the alkali liquor is mixed with the remaining part of tail water again, the tail water is discharged after being treated to reach the standard, and therefore alkalization adjusting treatment of all the tail water is achieved. According to the present invention, the modular design is adopted, the structure is compact, the application range is wide, the maintenance cost is low, the automatic control can be integrated, and the real-time monitoring of the water quality change and the precise control of the adding amount adjustment can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a tail water alkalization regulating device and a regulating method based on a multi-stage reaction tank. Background Art

[0002] In the treatment of tailwater from sewage treatment plants, increasing the alkalinity of tailwater is an emerging strategy to increase marine carbon sinks. It aims to neutralize some of the acidic substances in the ocean by discharging alkalinized tailwater into the ocean, thereby increasing the ocean's carbon sink capacity. Discharging alkalinized tailwater into the ocean can not only regulate the pH of seawater and slow down the trend of ocean acidification, but also enhance the ocean's ability to absorb atmospheric CO. 2 The absorption and storage capacity of carbon dioxide provides a new way to address climate change.

[0003] The tailwater treatment of traditional sewage treatment plants mainly focuses on removing harmful substances such as suspended particulate matter, organic matter and heavy metals, and rarely involves the adjustment of the alkalinity of the tailwater. The alkalinity of the tailwater after conventional sewage treatment is relatively low, which cannot effectively provide sufficient alkalization for the ocean and cannot meet the needs of enhancing marine carbon sinks. There are many deficiencies in improving the alkalinity of tailwater based on existing sewage treatment processes. For example, although the method of directly adding alkalizers can improve the alkalinity of tailwater to a certain extent, due to the lack of fine process control, it is easy to cause excessive or insufficient alkalizers, affecting the treatment effect. Excessive alkalizers will not only cause waste of resources, but may also cause secondary pollution to the marine environment after the tailwater is discharged. On the contrary, if the alkalizer is insufficient, the ideal alkalization effect cannot be achieved, which weakens the role of alkalized tailwater in enhancing marine carbon sinks.

[0004] Therefore, during the alkalization treatment process, the pH of the tail water and the amount of alkalizer added are difficult to monitor and accurately control in real time, which will lead to unstable alkalization effect of the tail water. Although some processes in the prior art can be automatically controlled to a certain extent, they are usually complex in structure, large in equipment, difficult to operate and maintain, and have relatively high operating costs. How to develop a tail water treatment device with a simple structure, easy to operate, and capable of achieving precise alkalization has become an important research direction for enhancing marine carbon sinks. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a tail water alkalization adjustment device and adjustment method based on a multi-stage reaction tank, which can efficiently and accurately adjust the alkalinity of tail water to meet the discharge standards. At the same time, after being discharged into the ocean, it can neutralize acidic substances and enhance marine carbon sinks. The design and operation of the device can effectively overcome the shortcomings of traditional tail water treatment processes, realize the automation, intelligence and stabilization of tail water alkalization, and solve the problems in the above-mentioned background technology.

[0006] One of the technical solutions adopted by the present invention to solve its technical problems is: providing a tail water alkalization regulating device based on a multi-stage reaction tank, including a tail water input pipe, an alkalization dissolution tank, an alkali solution storage tank, a pH regulating reaction tank and a control system;

[0007] The tail water input pipe inputs the tail water to be treated into the alkalization dissolution tank and the pH adjustment reaction tank respectively; the top of the alkalization dissolution tank is provided with an alkalizing agent feeding mechanism, and the inside is provided with an alkalization stirring mechanism; the alkali solution storage tank is connected to the alkalization dissolution tank through an alkali solution storage pipe; the pH adjustment reaction tank is connected to the alkali solution storage tank through an alkali solution input pipe, and the pH adjustment reaction tank is provided with a pH adjustment stirring mechanism; the control system includes an alkalization dissolution control box and a pH adjustment and alkali solution storage control box, and also includes sensors arranged on the alkalization dissolution tank, the alkali solution storage tank, and the pH adjustment reaction tank, and a water pump and an electronic valve arranged on the tail water input pipe, the alkali solution storage pipe and the alkali solution input pipe; the sensors include a pH sensor, a water level sensor, an alkalinity sensor, and a dissolved oxygen sensor.

[0008] In the present invention, two groups of input pipes are provided downstream of the water inlet end of the tailwater input pipe, a connecting pipe is provided between the two groups of input pipes, and the two groups of input pipes are respectively provided with electronic valves, water pumps and one-way valves.

[0009] In the present invention, the tailwater input pipe, the alkali solution storage pipe and the alkali solution input pipe respectively include at least two groups of parallel pipelines, and each group of parallel pipelines is provided with at least one water pump and two electronic valves before and after the water pump.

[0010] In the present invention, the alkalizing dissolution tank is provided with a top cover and a tank body; the top cover opening is connected with a pH sensor and a water level sensor interface, and is provided with an alkalizing agent input port, and the alkalizing agent feeding mechanism is arranged at the alkalizing agent input port; the tank body is a hollow tubular cylinder, and three openings are provided at the bottom and cylindrical surface of the tank body, namely, a maintenance drain outlet, a tail water inlet and an alkali solution outlet.

[0011] In the present invention, the alkalizer feeding mechanism includes a feeding motor, a spiral feeding hopper and a shell. The spiral feeding hopper is opened upward and arranged perpendicular to the shell. The feeding motor is arranged in the shell and located at the bottom of the spiral feeding hopper. The propulsion direction of the feeding motor is toward the alkalizer input port.

[0012] In the present invention, the alkalization stirring mechanism and the pH adjustment stirring mechanism include a stirring paddle, a stirring motor and a belt. The stirring paddle is arranged in the alkalization dissolution tank or the pH adjustment reaction tank and is connected to the stirring motor on the outer wall of the tank through the belt.

[0013] In the present invention, the pH adjustment reaction tank includes a top cover and a tank body, and the bottom and cylindrical surface of the tank body are provided with a maintenance drain port, an alkali solution inlet and a qualified tail water outlet; the top cover has a hole connected to a pH sensor and a water level sensor interface, and is also provided with an artificial maintenance port.

[0014] In the present invention, the alkalization dissolution control box and the pH adjustment and alkali solution storage control box include operation buttons and a display screen; the alkalization dissolution control box is used to control the tail water and alkalizer feeding of the alkalization dissolution tank, the movement of the alkalization stirring mechanism and the discharge of the alkalizer solution; the pH adjustment and alkali solution storage control box is used to control.

[0015] The second technical solution adopted by the present invention to solve its technical problem is: providing a tail water alkalization and regulation method based on a multi-stage reaction tank, inputting the tail water to be treated into the alkalization dissolution tank and the pH adjustment reaction tank respectively through the tail water input pipe; wherein, a part of the tail water to be treated is used as the solvent of the alkalizer, and by collecting the pH and water level information of the alkalization dissolution tank, the alkalization dissolution control box is used to control the dissolution degree of the alkalizer in the alkalization dissolution tank to obtain alkali solution; the alkali solution is stored in an alkali solution storage tank, and by collecting the pH and water level information of the pH adjustment reaction tank, the alkali solution is added to the pH adjustment reaction tank by using the pH adjustment and alkali solution storage control box, and mixed with the remaining part of the tail water again, and discharged after being treated until reaching the standard, thereby realizing the alkalization and regulation treatment of all the tail water.

[0016] Compared with the background technology, this technical solution has the following advantages:

[0017] 1. Modular design: Each functional module of the present invention can be independently installed, disassembled and maintained. Compared with the traditional integrated large-scale treatment device, the modular design facilitates the flexible adjustment of the equipment configuration according to different sewage treatment scales and discharge requirements. At the same time, the modular design reduces the difficulty of installation and maintenance, allowing the equipment to adapt to more usage scenarios and sewage treatment plants of different sizes, saving operating costs.

[0018] 2. Precise control: The present invention uses an alkalization dissolution control box and a pH adjustment and alkali solution storage control box to collect and monitor the pH value, water level and other parameters in each reaction tank in real time, and automatically control the addition of the alkalizer to achieve precise adjustment of the pH value of the tail water. The control system can automatically adjust the amount of alkalizer added according to the real-time monitored water quality changes to ensure that the pH value of the tail water is stable within the set range after treatment and meets environmental emission standards. This precise control not only improves the treatment effect, but also reduces the waste of alkalizers and reduces operating costs.

[0019] 3. Redundant design to improve system reliability: In traditional treatment devices, failures of key components such as water pumps often lead to the paralysis of the entire treatment system, affecting the stability of tailwater discharge. The present invention provides backup channels for key components such as water pumps by introducing parallel redundant design in the connecting pipeline and configuring corresponding electronic valves. When a water pump is damaged, the backup water pump can immediately take over the work to ensure that the device can continue to operate. Such redundant design greatly improves the reliability of the system, reduces the complexity of equipment maintenance, and reduces downtime caused by equipment failure.

[0020] 4. High level of automation and intelligence: The device integrates an automated control system, which can communicate with the indoor remote monitoring platform wirelessly or wired, and can realize remote monitoring and control of the status of each reaction tank. Through automation and intelligence, the device can adjust itself according to the real-time status of the tail water, reducing the dependence on manual operation. The operator only needs to observe the data on the monitoring platform and make necessary adjustments, which greatly improves work efficiency and reduces the frequency of human intervention.

[0021] 5. Strong adaptability: The device has a compact structure and can be adjusted according to different treatment scales and discharge standards. It is suitable for the alkalization treatment of tail water in various sewage treatment plants.

[0022] 6. Reduce maintenance costs: Due to the modular design and the inspection port at the bottom of each reactor, the cleaning and maintenance of the device becomes more convenient. Each functional module can be maintained and replaced separately without disassembling the entire system. This not only shortens the maintenance time, but also reduces the maintenance cost, extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the tailwater inlet pipe structure;

[0025] Figure 3 It is a schematic diagram of the structure of the alkalization dissolution tank;

[0026] Figure 4 A and b are schematic diagrams of the alkalizing agent feeding mechanism structure;

[0027] Figure 5 It is a schematic diagram of the alkalization stirring mechanism;

[0028] Figure 6 This is a schematic diagram of the alkaline dissolution control box;

[0029] Figure 7 It is a schematic diagram of the structure of the alkali solution storage tube;

[0030] Figure 8 A and b are schematic diagrams of the structure of the alkali solution storage tank;

[0031] Fig. 9 This is a schematic diagram of the structure of the alkali solution input pipe;

[0032] Fig.10 a and b are schematic diagrams of pH adjustment reaction tanks;

[0033] Fig.11 This is a schematic diagram of the pH adjustment stirring mechanism structure.

[0034] Among them, the alkalization dissolution tank 101, the alkali solution storage tank 102, the pH adjustment reaction tank 103, the alkalization dissolution control box 104, the pH adjustment and alkali solution storage control box 105, the alkalization agent feeding mechanism 106, the alkalization stirring mechanism 107, the pH adjustment stirring mechanism 108, the tail water input pipe 109, the alkali solution storage pipe 110, the alkali solution input pipe 111, the alkalization dissolution tank body 112, the alkalization dissolution tank top cover 113, the alkalization dissolution tank maintenance drain 114, the alkalization dissolution tank tail water inlet 115, the alkalization dissolution tank alkali solution outlet 116, the pH sensor interface 117, the water level sensor interface 118, the alkalization agent input port 119, the feeding motor 120, the spiral mechanism 121, the shell 122, the button 123, the display screen 12 4. Alkali liquid storage tank body 125, alkali liquid storage tank top cover 126, alkali liquid storage tank maintenance drain 127, alkali liquid inlet 128 of alkali liquid storage tank, alkali liquid outlet 129 of alkali liquid storage tank, pH adjustment reaction tank body 130, pH adjustment reaction tank top cover 131, pH adjustment reaction tank maintenance drain 132, pH adjustment reaction tank tail water inlet 133, pH adjustment reaction tank alkali liquid inlet 134, pH adjustment reaction tank standard tail water outlet 135, manual maintenance port 136, alkalization agitator 137, alkalization agitation motor 138, dissolution tank belt 139, reaction tank agitator 140, reaction tank agitation motor 141, reaction tank belt 142, water pipe 143, one-way valve 144, water pump 145, electronic valve 146 DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that the terms "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0036] Example

[0037] The present embodiment provides a tail water alkalization and regulation device based on a multi-stage reaction tank, comprising a tail water inlet pipe 109, an alkalization and dissolution tank, an alkali solution storage tank, a pH adjustment reaction tank and a control system; the control system comprises an alkalization and dissolution control box 104 and a pH adjustment and alkali solution storage control box 105, and also comprises a pH sensor and a water level sensor arranged in the alkalization and dissolution tank 101, the alkali solution storage tank 102, and the pH adjustment reaction tank 103, and a water pump and an electronic valve arranged in the tail water inlet pipe 109, the alkali solution storage pipe 110 and the alkali solution inlet pipe 111.

[0038] The tail water inlet pipe 109 respectively inputs the tail water to be treated into the alkalinization dissolution tank and the pH adjustment reaction tank. Figure 2 In this embodiment, there are two groups of input pipes downstream of the water inlet end of the tail water input pipe 109, and a connecting pipe 143 is provided between the two groups of input pipes. In addition, there are two one-way valves 144, four water pumps 145 and ten electronic valves 146; among them, the two one-way valves 144 are respectively connected to the front end of the tail water inlet of the alkalization dissolution tank 101 and the pH adjustment reaction tank 103 to prevent the tail water from flowing back; the four water pumps 145 and the eight electronic valves 146 form two parallel pipelines, and the two parallel pipelines are respectively connected to the tail water inlets of the alkalization dissolution tank 101 and the pH adjustment reaction tank 103.

[0039] The alkalization dissolution tank 101 is composed of an alkalization dissolution tank body 112 and an alkalization dissolution tank top cover 113; the alkalization dissolution tank body 112 is provided with three openings at the bottom and side thereof, namely, an alkalization dissolution tank maintenance drain outlet 114, an alkalization dissolution tank tail water inlet 115, and an alkalization dissolution tank alkali solution outlet 116; the alkalization dissolution tank top cover 113 is connected with a pH sensor interface 117 and a water level sensor interface 118, and is provided with an alkalization agent input port 119; the tail water of the sewage treatment plant enters from the alkalization dissolution tank tail water inlet 115, is mixed with the alkalization agent entering from the alkalization agent input port 119 to form alkali solution, and flows out from the alkalization dissolution tank alkali solution outlet 116. The alkalizing agent feeding mechanism 106 is composed of a feeding motor 120, a spiral mechanism 121, and a shell 122; the alkalizing agent is fed into the spiral mechanism 121 from the top opening of the shell 122, and the feeding motor 120 drives the spiral mechanism 121 to push the alkalizing agent into the alkalizing dissolution tank 101. The alkalizing stirring mechanism 107 is composed of an alkalizing stirrer 137, an alkalizing stirring motor 138, and a dissolution tank belt 139; the alkalizing stirrer 137 is arranged inside the alkalizing dissolution tank 101, and the alkalizing stirring motor 138 drives the alkalizing stirrer 137 through the dissolution tank belt 139 to fully and evenly mix the tail water and the alkalizing agent.

[0040] The alkaline dissolution control box 104 is composed of a plurality of buttons 123 and a display screen 124 ; the water pump 145 and the electronic valve 146 of the tail water inlet pipe 109 are controlled by the buttons 123 , and the display screen 124 can display information such as the pH value and water level of the alkaline dissolution tank 101 .

[0041] The alkali solution storage tank 102 is connected to the alkali dissolution tank 101 through an alkali solution storage pipe 110. The alkali solution storage pipe 110 is connected in sequence by a water pipe 143, two water pumps 145 and seven electronic valves 146; the two water pumps 145 and the four electronic valves 146 form a parallel pipeline, and the two ends are respectively connected to the alkali solution outlet 116 of the alkali dissolution tank and the alkali solution inlet 128 of the alkali solution storage tank.

[0042] The alkali liquid storage tank 102 consists of an alkali liquid storage tank body 125 and an alkali liquid storage tank top cover 126; three openings are opened at the bottom and side of the alkali liquid storage tank body 125, namely, an alkali liquid storage tank maintenance drain outlet 127, an alkali liquid storage tank alkali liquid inlet 128, and an alkali liquid storage tank alkali liquid outlet 129; the alkali liquid storage tank top cover 126 is connected to a pH sensor interface 117 and a water level sensor interface 118.

[0043] The pH adjustment reaction tank 103 is connected to the alkali solution storage tank 102 through an alkali solution input pipe 111. The alkali solution input pipe 111 is connected in sequence to a water pipe 143, two water pumps 145 and seven electronic valves 146; the two water pumps 145 and the four electronic valves 146 form a parallel pipeline, and the two ends are respectively connected to the alkali solution outlet 129 of the alkali solution storage tank and the alkali solution inlet 134 of the pH adjustment reaction tank.

[0044] The pH adjustment reaction tank 103 is composed of a pH adjustment reaction tank body 130 and a pH adjustment reaction tank top cover 131; the pH adjustment reaction tank body 130 is provided with four openings at the bottom and side thereof, namely a pH adjustment reaction tank maintenance drain outlet 132, a pH adjustment reaction tank tail water inlet 133, a pH adjustment reaction tank alkali solution inlet 134, and a pH adjustment reaction tank standard tail water outlet 135; the pH adjustment reaction tank top cover 131 is connected with a pH sensor interface 117 and a water level sensor interface 118; and at the same time, the pH adjustment reaction tank top cover 131 is provided with an artificial maintenance opening 136, so as to facilitate regular maintenance of the pH adjustment reaction tank.

[0045] The pH adjustment stirring mechanism 108 is composed of a reaction tank stirrer 140, a reaction tank stirring motor 141, and a reaction tank belt 142; the reaction tank stirrer 140 is arranged inside the pH adjustment reaction tank 103, and the reaction tank stirring motor 141 drives the reaction tank stirrer 140 through the reaction tank belt 142 to fully mix the tail water and the alkali solution.

[0046] A tail water alkalization and regulation method based on a multi-stage reaction tank using the device of this embodiment comprises the following steps:

[0047] First, the tail water to be treated of the sewage treatment plant is input into the alkalization dissolution tank 101 and the pH adjustment reaction tank 103 through the tail water input pipe 109; a part of the tail water to be treated is used as the solvent of the alkalizer, and the pH and water level information of the alkalization dissolution tank 101 is collected, and the alkalization dissolution control box 104 is used to accurately control the alkalizer feeding mechanism 106 to add the alkalizer to the alkalization dissolution tank 101 as needed, so that the alkalizer is dissolved in the alkalization dissolution tank 101 to obtain an alkali solution with a specific pH value; the alkalization dissolution is used to The control box 104 controls the alkali solution to be discharged from the alkaline dissolution tank 101, and stores the alkali solution in the alkali solution storage tank 102. By collecting the pH and water level information of the pH adjustment reaction tank 103, the pH adjustment and alkali solution storage control box 105 is used to add alkali solution to the pH adjustment reaction tank 103, and the two are mixed again with the remaining part of the tail water in proportion and accurately controlled; the pH and water level information in the pH adjustment reaction tank 103 is collected in real time, and the tail water is discharged after being monitored to meet the treatment standards, thereby realizing the alkalinization adjustment treatment of all the tail water.

[0048] During the treatment process, the method of this embodiment can use the control system to adjust the stirring mechanism in the tank to accelerate the mixing of alkali solution and tail water, improve the timeliness of information collection and the accuracy of control. The modular setting of the multi-stage reaction tank can not only better control the reaction time and reaction conditions, but also ensure that the pH value of the tail water remains stable and improve the quality of the effluent. At the same time, during or after the treatment process, the alkalization dissolution tank 101, the alkali solution storage tank 102 and the pH adjustment reaction tank 103 are equipped with inspection ports at the bottom to clean and inspect the devices in the tank.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tail water alkalization regulating device based on a multi-stage reaction tank, characterized in that: It includes tail water inlet pipe, alkalization dissolution tank, alkali solution storage tank, pH adjustment reaction tank and control system; The tail water input pipe inputs the tail water to be treated into the alkalization dissolution tank and the pH adjustment reaction tank respectively; the top of the alkalization dissolution tank is provided with an alkalizing agent feeding mechanism, and the inside is provided with an alkalization stirring mechanism; the alkali solution storage tank is connected to the alkalization dissolution tank through an alkali solution storage pipe; the pH adjustment reaction tank is connected to the alkali solution storage tank through an alkali solution input pipe, and the pH adjustment reaction tank is provided with a pH adjustment stirring mechanism; the control system includes an alkalization dissolution control box and a pH adjustment and alkali solution storage control box, and also includes sensors arranged on the alkalization dissolution tank, the alkali solution storage tank, and the pH adjustment reaction tank, and a water pump and an electronic valve arranged on the tail water input pipe, the alkali solution storage pipe and the alkali solution input pipe.

2. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: There are two groups of input pipes downstream of the water inlet end of the tailwater input pipe, a connecting pipe is arranged between the two groups of input pipes, and the two groups of input pipes are respectively provided with electronic valves, water pumps and one-way valves.

3. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: The tail water input pipe, the alkali solution storage pipe and the alkali solution input pipe respectively include at least two groups of parallel pipelines, and each group of parallel pipelines is provided with at least one water pump and two electronic valves before and after the water pump.

4. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: The alkalizing dissolution tank is provided with a top cover and a tank body; the top cover opening is connected with a sensor interface, and the sensors include a pH sensor, a water level sensor, an alkalinity sensor, and a dissolved oxygen sensor; the top cover is also provided with an alkalizing agent input port, and the alkalizing agent feeding mechanism is arranged at the alkalizing agent input port; the tank body is a hollow tubular cylinder, and three openings are provided at the bottom and cylindrical surface of the tank body, which are a maintenance drain port, a tail water inlet, and an alkali solution outlet.

5. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 4 is characterized in that: The alkalizer feeding mechanism comprises a feeding motor, a spiral feeding hopper and a shell. The spiral feeding hopper is opened upward and arranged perpendicular to the shell. The feeding motor is arranged in the shell and located at the bottom of the spiral feeding hopper. The propulsion direction of the feeding motor is toward the alkalizer input port.

6. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: The alkalization stirring mechanism and the pH adjustment stirring mechanism include a stirring paddle, a stirring motor and a belt. The stirring paddle is arranged in the alkalization dissolution tank or the pH adjustment reaction tank and is connected to the stirring motor on the outer wall of the tank body through the belt.

7. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: The pH adjustment reaction tank includes a top cover and a tank body, and the bottom and cylindrical surface of the tank body are provided with a maintenance drain port, an alkali solution inlet and a qualified tail water outlet; the top cover is provided with a hole connected to a sensor interface, and the sensors include a pH sensor, a water level sensor, an alkalinity sensor, and a dissolved oxygen sensor; the top cover is also provided with a manual maintenance port.

8. The tail water alkalization regulating device based on a multi-stage reaction tank according to claim 1, characterized in that: The alkalization dissolution control box and the pH adjustment and alkali solution storage control box include operation buttons and a display screen; the alkalization dissolution control box is used to control the tail water and alkalizer feeding of the alkalization dissolution tank, the movement of the alkalization stirring mechanism and the discharge of the alkalizer solution; the pH adjustment and alkali solution storage control box is used to control.

9. A tail water alkalization and regulation method based on a multi-stage reaction tank, characterized in that: A device as described in any one of claims 1 to 8 is used.

10. The tail water alkalization and regulation method based on a multi-stage reaction tank according to claim 9, characterized in that: The tail water to be treated is input into the alkalization dissolution tank and the pH adjustment reaction tank respectively through the tail water input pipe; wherein, a part of the tail water to be treated is used as the solvent of the alkalizer, and the pH and water level information of the alkalization dissolution tank are collected, and the dissolution degree of the alkalizer in the alkalization dissolution tank is controlled by the alkalization dissolution control box to obtain alkali solution; the alkali solution is stored in the alkali solution storage tank, and the pH and water level information of the pH adjustment reaction tank are collected, and the alkali solution is added to the pH adjustment reaction tank by the pH adjustment and alkali solution storage control box, and mixed with the remaining part of the tail water again, and discharged after being treated until reaching the standard, thereby realizing the alkalization adjustment treatment of all the tail water.

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