Device for adjusting pH value of sewage

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a sewage pH value adjusting device which comprises a sewage adjusting tank, a first pH value detection module, a second pH value detection module and a chemical feeding module. The first pH value detection module is connected to the front end of the sewage adjusting tank and is used for detecting the pH value of the unadjusted sewage; the second pH value detection module is connected to the rear end of the sewage adjusting tank and is used for detecting the pH value of the adjusted sewage; the chemical feeding module is installed in the sewage adjusting tank and comprises a chemical feeding main pipeline and a chemical feeding branch pipeline. The sewage pH value adjusting device disclosed by the utility model avoids the problem of low sewage pH value adjusting efficiency caused by the fact that medicines cannot quickly enter different liquid level layers to be fully neutralized with sewage.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage pH regulating device. Background Art

[0002] With the accelerated pace of industrialization in my country, the chemical industry is a key sector. However, its production and processing generate significant amounts of wastewater. Chemical wastewater contains significant amounts of organic matter, heavy metal ions, and other pollutants, which, if discharged directly, can cause severe ecological pollution. Therefore, the treatment of chemical wastewater is essential to reducing environmental pollution, protecting natural resources, and promoting sustainable development.

[0003] Common methods for treating wastewater from chemical plants include physical treatment, chemical treatment, and biological treatment. Physical treatment primarily removes suspended solids and particulate matter through filtration, flocculation, and sedimentation, such as membrane separation and adsorption. Chemical treatment removes organic pollutants through chemical reactions, oxidation, neutralization, electrolysis, ion exchange, and dialysis. Biological treatment utilizes the metabolic activity of microorganisms to break down organic matter into harmless substances.

[0004] The sewage treatment plant of a certain factory uses preliminary flocculation and sedimentation treatment. The upstream device transports sewage to a high-salt neutralization reaction tank. Liquid alkali and anionic polyacrylamide are added to the neutralization reaction tank. The main function is to flocculate small impurities or particulate matter in the sewage into large particles, which are convenient for separation from the sedimentation tank. However, after the addition of liquid alkali, the pH value of the sewage is too high, which does not meet the pH value requirements for the downstream sewage treatment. In the existing technology, sulfuric acid is usually added to the sewage to make the pH value of the sewage meet the requirements for external treatment. However, sulfuric acid cannot quickly enter the different liquid level layers to fully neutralize the sewage, and the efficiency of sewage pH adjustment is low. Therefore, in order to solve the above background problems, it is urgent to develop a sewage pH adjustment device. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a sewage pH regulating device, which avoids the problem that the medicine cannot quickly enter different liquid level layers and fully neutralize with the sewage, resulting in low sewage pH regulation efficiency.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical solutions:

[0007] In a first aspect, the utility model provides a sewage pH regulating device, comprising:

[0008] Sewage conditioning tank;

[0009] a first pH detection module, connected to the front end of the sewage adjustment tank, for detecting the pH of unadjusted sewage;

[0010] a second pH detection module, connected to the rear end of the sewage adjustment tank, for detecting the pH of the adjusted sewage; and

[0011] A drug feeding module is installed inside the sewage regulating tank, and the drug feeding module includes a drug feeding main line and a drug feeding branch line;

[0012] The main drug feed line extends downward from the top of the sewage regulating tank along the height direction of the sewage regulating tank, and several branch drug feed lines are connected to the periphery of the main drug feed line and are distributed at intervals along the height direction of the sewage regulating tank. Drug outlets are provided at the ends of several branch drug feed lines so that the sewage regulating medium can enter each liquid level layer of the sewage in the sewage regulating tank.

[0013] In some implementations, a plurality of branch holes are provided on the drug inlet branch line at intervals.

[0014] In this implementation, the drug flows out through a number of branch holes, which increases the contact area between the drug and the sewage, so that the drug can fully react with the sewage to neutralize it, thereby improving the efficiency of regulating the pH of the sewage.

[0015] In some implementations, the drug inlet branch lines are evenly spaced along the circumference of the drug inlet main line.

[0016] In this implementation, the contact area between the drug and the sewage is increased, so that the drug and the sewage are neutralized more quickly, thereby improving the efficiency of regulating the pH value of the sewage.

[0017] In some implementations, an angle is formed between two adjacent drug inlet branch pipes, and the angle of the angle is any value between 30° and 40°.

[0018] In some implementations, the drug inlet branch pipes are evenly spaced along the height direction of the sewage regulating tank, and the spacing distance is any value between 15 cm and 30 cm.

[0019] In some implementations, a dosing module and a control module are further included, wherein the dosing module is connected to the input end of the main drug inlet line, the input end of the control module is connected to the first pH detection module and / or the second pH detection module, and the output end is connected to the dosing module to control the dosing module to execute the dosing instruction according to the detection data of the first pH detection module and / or the second pH detection module.

[0020] In this implementation, the first pH detection module detects unadjusted sewage and feeds back the detection data to the control module. The control module controls the dosing module to add medicine based on the detection data to adjust the pH of the sewage. Then the second pH detection module detects the adjusted sewage and feeds back the detection data to the control module.

[0021] In some implementations, it also includes an inlet valve and an outlet valve. The top of the sewage regulating tank is provided with an inlet interface, and the inlet valve is connected to the inlet interface. The bottom of the sewage regulating tank is provided with an outlet interface, and the outlet valve is connected to the outlet interface.

[0022] In some implementations, the system further includes a first liquid level detection module for detecting the highest liquid level of sewage in the sewage regulating tank, and a second liquid level detection module for detecting the lowest liquid level of sewage in the sewage regulating tank.

[0023] In some implementations, the input end of the control module is further connected to the first liquid level detection module, and the output end is further connected to the water inlet valve, so as to control the water inlet valve to execute a switching instruction according to the sewage level in the sewage regulating tank; and / or

[0024] The input end of the control module is also connected to the second liquid level detection module, and the output end is also connected to the water outlet valve, so as to control the water outlet valve to execute a switch instruction according to the sewage liquid level in the sewage regulating tank.

[0025] In this implementation, the first liquid level detection module and / or the second liquid level detection module detects the sewage level in the sewage regulating tank and feeds the sewage level back to the control module, which controls the switching of the water inlet valve and / or the water outlet valve according to the sewage level.

[0026] In some implementations, the water outlet interface is further connected to a water outlet pump to drive the sewage in the sewage regulating tank to be discharged from the water outlet interface.

[0027] In some implementations, a mud discharge interface is provided at the bottom of the sewage regulating tank.

[0028] In this implementation, the sludge accumulated at the bottom of the sewage regulating tank is discharged from the sludge discharge interface, which can prevent the sludge from entering the equipment of the next station, thereby reducing the sludge treatment cost.

[0029] In summary, the present invention has at least the following advantages:

[0030] The sewage pH regulating device provided by the utility model connects a number of branch medicine feed pipes at the periphery of the main medicine feed pipe, so that the medicine is dispersed to the branch medicine feed pipes through the main medicine feed pipe, and then flows out from the medicine outlet of the branch medicine feed pipe. Since the several branch medicine feed pipes are spaced apart along the height direction of the sewage regulating tank, the medicine can enter the different liquid level layers in the sewage regulating tank through the several medicine outlets, and react with the sewage in the different liquid level layers to regulate the pH of the sewage, thereby avoiding the problem of low efficiency of sewage pH regulation caused by the inability of the medicine to quickly enter the different liquid level layers and fully neutralize with the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the sewage pH regulating device of Example 1;

[0032] Figure 2 for Figure 1 The structural diagram of the drug feeding module shown;

[0033] Figure 3 Schematic diagram of the structure of a sewage pH regulating device in some embodiments.

[0034] Markings in the figure:

[0035] 1. Sewage regulating tank; 11. Water inlet valve; 12. Water outlet valve; 13. Water inlet interface; 14. Water outlet interface; 15. Mud discharge interface;

[0036] 2. The first pH detection module;

[0037] 3. Second pH detection module;

[0038] 4. Drug inlet module; 41. Drug inlet main line; 42. Drug inlet branch line; 421. Drug outlet; 422. Branch hole;

[0039] 5. Dosing module;

[0040] 6. Control module;

[0041] 7. First liquid level detection module;

[0042] 8. Second liquid level detection module. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] Example 1:

[0046] Please see the attached Figures 1 and 2 The sewage pH regulating device of the present invention includes a sewage regulating tank 1, a first pH detection module 2, a second pH detection module 3 and a drug feeding module 4.

[0047] Among them, see Figure 1 , Figure 1 The diagram illustrates the structural relationship among the sewage regulating tank 1, the first pH detection module 2, the second pH detection module 3 and the drug feeding module 4 in an embodiment of the present utility model. Specifically, the first pH detection module 2 is connected to the front end of the sewage regulating tank 1 for detecting the pH of the unregulated sewage; the second pH detection module 3 is connected to the rear end of the sewage regulating tank 1 for detecting the pH of the regulated sewage; the drug feeding module 4 is installed inside the sewage regulating tank 1, and the drug feeding module 4 includes a drug feeding main line 41 and a drug feeding branch line 42. The drug feeding main line 41 extends downward from the top of the sewage regulating tank 1 along the height direction of the sewage regulating tank 1, and a number of drug feeding branch lines 42 are connected to the periphery of the drug feeding main line 41 and are spaced apart along the height direction of the sewage regulating tank 1. Drug outlets 421 are provided at the ends of the several drug feeding branch lines 42, so that the sewage regulating medium can enter each liquid level layer of the sewage in the sewage regulating tank 1.

[0048] In this embodiment, the first pH detection module 2 detects the pH of the unadjusted sewage, and according to the detected pH of the sewage, the drug feeding module 4 replenishes the corresponding drugs, thereby making the pH of the sewage in the sewage regulating tank 1 meet the treatment requirements of the next station. Specifically, the drugs first enter the drug feeding main line 41. Since the periphery of the drug feeding main line 41 is connected to a plurality of branch lines, and the plurality of branch lines are spaced apart along the height direction of the sewage regulating tank 1, the drugs enter the drug feeding main line 41 and are dispersed to a plurality of drug feeding branch lines 42, and then flow out from the drug outlets 421 of the plurality of drug feeding branch lines 42. In this way, the drugs can enter each liquid level of the sewage in the sewage regulating tank 1, and react with the sewage at different liquid level layers to produce an acid-base neutralization reaction, so that the pH of the sewage is adjusted to the pH index that meets the treatment requirements of the next station; the adjusted sewage is detected by the second pH detection module 3, and after reaching the pH target value, it is transported to the next station.

[0049] Preferably, the end of the main drug inlet line 41 is closed, preventing the majority of the drug from flowing out of the end of the main drug inlet line 41 while only a small portion flows out of the end of the branch drug inlet line 42. This, in turn, avoids inconsistent pH adjustments at different liquid levels. In this embodiment, the drug is sulfuric acid, which is added to alkaline wastewater to lower the wastewater's pH. Conversely, if the wastewater's pH is low, the sulfuric acid can be neutralized by adding liquid caustic soda to adjust the wastewater's pH.

[0050] It is understood that the use of a drug inlet main line 41 and a drug inlet branch line 42 in conjunction with the drug inlet method allows the drug to be dispersed in the sewage at different liquid levels within the sewage conditioning tank 1, thereby avoiding the problem of uneven acid-base neutralization of the sewage. Furthermore, the device is simple and does not require additional stirring equipment, thus saving energy and costs. However, if the drug is directly injected into the sewage and then stirred using a stirring device, the larger the tank, the larger the stirring device required. Otherwise, it is difficult to ensure that the drug and sewage are fully neutralized. This inevitably increases energy consumption and makes installation and maintenance difficult.

[0051] The above-mentioned sewage pH regulating device connects a number of drug feed branch pipes 42 on the periphery of the drug feed main pipe 41, so that the medicine is dispersed to the drug feed branch pipes 42 through the drug feed main pipe 41, and then flows out from the drug outlet 421 of the drug feed branch pipe 42. Since the several drug feed branch pipes 42 are spaced apart along the height direction of the sewage regulating tank 1, the medicine can enter the different liquid level layers in the sewage regulating tank 1 through the several drug outlets 421, and react with the sewage in the different liquid level layers to regulate the pH of the sewage, thereby avoiding the problem that the medicine cannot quickly enter the different liquid level layers and fully neutralize with the sewage, resulting in low efficiency of sewage pH regulation.

[0052] In some preferred embodiments, see Figure 2 , Figure 2 The diagram illustrates the structural relationship between the drug inlet main line 41 and the drug inlet branch line 42 in an embodiment of the present utility model. Specifically, a plurality of branch holes 422 are spaced apart on the drug inlet branch line 42. The drug flows out through the plurality of branch holes 422, which increases the contact area between the drug and the sewage, so that the drug can fully react with the sewage to neutralize, thereby improving the efficiency of regulating the pH of the sewage. A plurality of branch holes 422 are provided on each of the drug inlet branch lines 42, and the number of branch holes 422 can be set according to the actual pH regulation requirements. In this embodiment, six branch holes 422 are provided on each drug inlet branch line 42. Preferably, the diameter of the branch hole 422 is 5 mm.

[0053] Furthermore, considering that the pressures of different liquid level layers are different, it is more difficult for the drug to flow out from the drug outlet 421 and / or the branch hole 422 in the liquid level layer with high pressure. In order to ensure the neutralization consistency of the drug with different liquid level layers, the diameters of the branch holes 422 on the drug feed branch line 42 in different liquid level layers can be set to be inconsistent. For example, the lower the liquid level layer, the greater the pressure, and the larger the branch hole 422 opened on the drug feed branch line 42, and so on. The higher the liquid level layer, the smaller the pressure, and the smaller the branch hole 422 opened on the drug feed branch line 42.

[0054] In some preferred embodiments, the drug inlet branch pipes 42 are evenly spaced along the circumferential direction of the drug inlet main pipe 41. The contact area between the drug and the sewage is increased, so that the drug and the sewage are neutralized more quickly, thereby improving the efficiency of regulating the pH value of the sewage. An angle is formed between two adjacent drug inlet branch pipes 42, and the angle of the angle is any value between 30° and 40°. It is ensured that the sewage between the drug inlet branch pipes 42 and the drug inlet branch pipes 42 can also come into contact with the drug, and at the same time it is convenient to control the injection amount of the drug and ensure the reliability of the sewage pH regulating device. Of course, the number of drug inlet branch pipes 42 can be increased or decreased according to the actual regulation requirements of the sewage. In this embodiment, the number of drug inlet branch pipes 42 is 10.

[0055] In some preferred embodiments, the drug feed branch lines 42 are evenly spaced along the height of the sewage conditioning tank 1, with spacing ranging from 15 cm to 30 cm. This ensures more uniform contact between the drug and the sewage, ensuring consistent neutralization of the drug with sewage at different liquid levels. Of course, the spacing between the drug feed branch lines 42 can be adjusted to ensure reliable sewage conditioning based on actual sewage pH adjustment requirements.

[0056] Example 2:

[0057] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the sewage pH regulating device of the utility model. Figure 3 .

[0058] Among them, see Figure 3 , Figure 3 The diagram illustrates the structural relationship between the dosing module 5 and the main drug inlet line 41 in an embodiment of the present invention. Specifically, the sewage pH adjustment device further includes a dosing module 5 and a control module 6. The dosing module 5 is connected to the input end of the main drug inlet line 41. The input end of the control module 6 is connected to the first pH detection module 2 and / or the second pH detection module 3, and the output end is connected to the dosing module 5 to control the dosing module 5 to execute a dosing instruction based on the detection data of the first pH detection module 2 and / or the second pH detection module 3.

[0059] In this embodiment, the first pH detection module 2 detects unadjusted wastewater and feeds the detection data back to the control module 6. The control module 6 controls the dosing module 5 to add medicine based on the detection data to adjust the pH of the wastewater. The second pH detection module 3 then detects the adjusted wastewater and feeds the detection data back to the control module 6. The control module 6 determines whether the detection data is consistent with the target pH. If it is consistent, the compensation dosing instruction is not executed. If it is inconsistent, the compensation dosing instruction is executed or the dosing module 5 is controlled to reduce the dosage. Preferably, the dosing module 5 includes a dosing pump, which is connected to the input end of the drug inlet main line 41 and the external drug medium source respectively. The dosing pump allows the drug to enter the drug inlet main line 41 and then be dispersed into the wastewater to be adjusted.

[0060] It can be understood that the control module 6 can be a PID controller, which is used to receive and transmit relevant data to control the equipment to execute relevant instructions; the control module 6 can also be a control system composed of a PID controller and a DCS system. The control system is used to receive and transmit relevant data to control the equipment to execute relevant instructions, and to monitor various parameters in the sewage adjustment process in real time. Once an abnormality is found, an alarm is used to inform the staff of the abnormal situation in the sewage treatment process in a timely manner.

[0061] In some preferred embodiments, please continue to see Figure 3 The sewage pH regulating device also includes an inlet valve 11 and an outlet valve 12. A water inlet interface 13 is provided on the top of the sewage regulating tank 1, and the inlet valve 11 is connected to the inlet interface 13. A water outlet interface 14 is provided on the bottom of the sewage regulating tank 1, and the outlet valve 12 is connected to the outlet interface 14. By controlling the switches of the inlet valve 11 and the outlet valve 12, the inlet interface 13 and the outlet interface 14 of the sewage regulating tank 1 are opened or closed. The sewage pH regulating device also includes a first liquid level detection module 7 for detecting the highest liquid level of sewage in the sewage regulating tank 1, and a second liquid level detection module 8 for detecting the lowest liquid level of sewage in the sewage regulating tank 1. This allows the staff to know the liquid level in the sewage regulating tank 1, avoiding the problem of sewage exceeding the highest liquid level causing leakage and sewage below the lowest liquid level causing the sewage regulating tank 1 to be emptied.

[0062] Example 3:

[0063] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the sewage pH regulating device of the utility model. Please continue to refer to the attached Figure 3 .

[0064] Among them, the input end of the control module 6 is also connected to the first liquid level detection module 7, and the output end is also connected to the water inlet valve 11, so as to control the water inlet valve 11 to execute the switching instruction according to the sewage liquid level in the sewage regulating tank 1; and / or the input end of the control module 6 is also connected to the second liquid level detection module 8, and the output end is also connected to the water outlet valve 12, so as to control the water outlet valve 12 to execute the switching instruction according to the sewage liquid level in the sewage regulating tank 1.

[0065] In this embodiment, the first liquid level detection module 7 detects the sewage liquid level in the sewage regulating tank 1 and feeds the sewage liquid level back to the control module 6. The control module 6 controls the switch of the water inlet valve 11 according to the sewage liquid level; the second liquid level detection module 8 detects the sewage liquid level in the sewage regulating tank 1 and feeds the sewage liquid level back to the control module 6. The control module 6 controls the switch of the water outlet valve 12 according to the sewage liquid level; fully automatic detection and control are realized, reducing labor costs.

[0066] In some preferred embodiments, the water outlet interface 14 is further connected to a water outlet pump to drive the sewage in the sewage regulating tank 1 to be discharged from the water outlet interface 14, thereby improving the reliability of sewage discharge.

[0067] In some more preferred embodiments, please continue to see Figure 3 The bottom of the sewage conditioning tank 1 is provided with a sludge discharge port 15. This allows sludge accumulated at the bottom of the sewage conditioning tank 1 to be discharged through the sludge discharge port 15, preventing it from entering the equipment at the next station and thus reducing sludge treatment costs. Preferably, the sludge discharge port 15 is connected to a sludge discharge pump, thereby improving the reliability of sludge discharge from the sewage conditioning tank 1.

[0068] The sewage pH regulating device of the present invention connects a number of drug inlet branch pipes 42 at the periphery of the drug inlet main pipe 41, so that the medicine is dispersed to the drug inlet branch pipes 42 through the drug inlet main pipe 41, and then flows out from the drug outlet 421 of the drug inlet branch pipe 42. Since the several drug inlet branch pipes 42 are spaced apart along the height direction of the sewage regulating tank 1, the medicine can enter the different liquid level layers in the sewage regulating tank 1 through the several drug outlets 421, and react with the sewage in the different liquid level layers to regulate the pH of the sewage, thereby avoiding the problem that the medicine cannot quickly enter the different liquid level layers and fully neutralize with the sewage, resulting in low efficiency of sewage pH regulation.

[0069] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0070] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0071] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0072] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A sewage pH regulating device, characterized in that: include: Sewage conditioning tank (1); A first pH detection module (2), connected to the front end of the sewage adjustment tank (1), for detecting the pH of unadjusted sewage; A second pH detection module (3) is connected to the rear end of the sewage adjustment tank (1) and is used to detect the pH of the adjusted sewage; as well as A drug feeding module (4) is installed inside the sewage regulating tank (1), and the drug feeding module (4) includes a drug feeding main line (41) and a drug feeding branch line (42); The drug feed main line (41) extends downward from the top of the sewage regulating tank (1) along the height direction of the sewage regulating tank (1), and a plurality of drug feed branch lines (42) are connected to the periphery of the drug feed main line (41) and are spaced apart along the height direction of the sewage regulating tank (1), and a drug outlet (421) is provided at the end of a plurality of drug feed branch lines (42); so that the sewage regulating medium can enter each liquid level layer of the sewage in the sewage regulating tank (1).

2. The sewage pH regulating device according to claim 1, characterized in that: A plurality of branch holes (422) are provided at intervals on the medicine inlet branch pipeline (42).

3. The sewage pH regulating device according to claim 1, characterized in that: The drug inlet branch lines (42) are evenly spaced along the circumferential direction of the drug inlet main line (41).

4. The sewage pH regulating device according to claim 3, characterized in that: An angle is formed between two adjacent drug inlet branch pipes (42), and the angle is any value between 30° and 40°.

5. The sewage pH regulating device according to claim 1, characterized in that: The drug inlet branch pipes (42) are evenly spaced along the height direction of the sewage regulating tank (1), and the spacing distance is any value between 15 cm and 30 cm.

6. The sewage pH regulating device according to claim 1, characterized in that: The invention also includes a drug-adding module (5) and a control module (6), wherein the drug-adding module (5) is connected to the input end of the drug-inlet main line (41), the input end of the control module (6) is connected to the first pH detection module (2) and / or the second pH detection module (3), and the output end is connected to the drug-adding module (5) to control the drug-adding module (5) to execute a drug-adding instruction according to the detection data of the first pH detection module (2) and / or the second pH detection module (3).

7. The sewage pH regulating device according to claim 6, characterized in that: It also includes a water inlet valve (11) and a water outlet valve (12); a water inlet interface (13) is provided on the top of the sewage regulating tank (1); the water inlet valve (11) is connected to the water inlet interface (13); a water outlet interface (14) is provided on the bottom of the sewage regulating tank (1); the water outlet valve (12) is connected to the water outlet interface (14).

8. The sewage pH regulating device according to claim 7, characterized in that: It also includes a first liquid level detection module (7) for detecting the highest liquid level of sewage in the sewage regulating tank (1), and a second liquid level detection module (8) for detecting the lowest liquid level of sewage in the sewage regulating tank (1).

9. The sewage pH regulating device according to claim 8, characterized in that: The input end of the control module (6) is also connected to the first liquid level detection module (7), and the output end is also connected to the water inlet valve (11), so as to control the water inlet valve (11) to execute a switch instruction according to the sewage liquid level in the sewage regulating tank (1); and / or The input end of the control module (6) is also connected to the second liquid level detection module (8), and the output end is also connected to the water outlet valve (12), so as to control the water outlet valve (12) to execute a switch instruction according to the sewage liquid level in the sewage regulating tank (1).

10. The sewage pH regulating device according to claim 7, characterized in that: The water outlet interface (14) is also connected to a water outlet pump to drive the sewage in the sewage regulating tank (1) to be discharged from the water outlet interface (14).

11. The sewage pH regulating device according to claim 1, characterized in that: A mud discharge interface (15) is provided at the bottom of the sewage regulating tank (1).

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