Sewage treatment device for anticorrosive paint production

Abstract

The utility model belongs to the technical field of sewage treatment, and relates to a sewage treatment device for anticorrosive paint production, which comprises a coagulating basin, a vertical flow sedimentation basin, an inclined tube sedimentation basin, a clean water basin and a control box, the coagulating basin, the vertical flow sedimentation basin, the inclined tube sedimentation basin, the clean water basin and the control box are separated by partition plates and communicated through a liquid inlet pipe and a liquid outlet, and the coagulating basin is provided with Ca (OH) 2 and PAC medicine barrels and is provided with a stirring device and a motor. The vertical flow sedimentation tank is provided with a PAM (Polyacrylamide) medicine barrel, an aeration pipe and a reflecting plate, the bottom of the vertical flow sedimentation tank is provided with a drain outlet, the inclined pipe sedimentation tank is provided with an inclined pipe and a drain outlet, the clean water tank is provided with a floating ball switch and a water outlet, and the air compressor is communicated with a medicine outlet pipe of the medicine barrel through a dredging pipe, so that pneumatic dredging is realized. The aeration machine is used for releasing bubbles to mix the sewage with the medicament, so that the medicament can be more fully mixed into the sewage, the flocculation and sedimentation efficiency of dirt is enhanced, the blocked medicament inlet pipeline is dredged by using the gas of the aeration machine, and the influence on the sewage treatment efficiency due to long-time blockage of the pipeline is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a wastewater treatment device for the production of anti-corrosion coatings. Background Technology

[0002] Wastewater generated during the production of anti-corrosion coatings typically contains organic solvents, pigments, fillers, emulsifiers, additives, and small amounts of heavy metal ions. If these pollutants are discharged directly into the environment without treatment, they will cause serious environmental pollution.

[0003] In existing technologies, wastewater treatment typically employs flocculation and sedimentation, which involves adding appropriate amounts of PAC and PAM to the wastewater to cause the pollutants in the wastewater to coagulate and precipitate, thereby purifying the wastewater.

[0004] However, in the above methods, during the feeding of PAC and PAM, after the agents are added to the coagulation tank and vertical flow sedimentation tank, it is difficult for the agents and sewage to be completely and evenly mixed. At the same time, the feeding pipe is prone to blockage after the agents are added, which affects the dosing efficiency, resulting in insufficient flocculant in the sewage and affecting the sedimentation efficiency of sludge. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides an automatic drug delivery wastewater treatment device for the production of anti-corrosion coatings.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0007] A wastewater treatment device for the production of anti-corrosion coatings includes a coagulation tank 1, a vertical flow sedimentation tank 2, an inclined tube sedimentation tank 3, a clear water tank 4, a control box 5, an air compressor 6, and an aeration pipe 7. The tanks are separated by partitions. The coagulation tank 1 and the vertical flow sedimentation tank 2 are connected by an inlet pipe 22 above the partitions. The vertical flow sedimentation tank 2 and the inclined tube sedimentation tank 3 are connected by an outlet above the partitions. The control box 5 is installed on the side wall of the tank. The aeration pipe 7 is located inside the vertical flow sedimentation tank 2 and connected to the air compressor 6.

[0008] Furthermore, a Ca(OH)2 reagent tank 11 and a PAC reagent tank 12 are installed on the side wall outside the coagulation tank 1 and are connected to the inside of the tank. A stirring device 13 and a motor 14 are installed inside the coagulation tank 1. The motor 14 is installed on a bracket above the coagulation tank 1. The stirring device 13 is connected to the motor 14 and extends into the coagulation tank 1.

[0009] Furthermore, a PAM medicine tank 21 is installed on the side wall outside the vertical flow sedimentation tank 2, and an inlet pipe 22 extends into the vertical flow sedimentation tank 2 with the pipe opening facing downward. A reflector plate 23 is installed at the pipe opening, and the sewage outlet 24 of the vertical flow sedimentation tank 2 is opened on the bottom side wall of the tank and connected to an external filter press.

[0010] Furthermore, the inclined tube sedimentation tank 3 includes an inclined tube 31 and a second discharge port 32. The inclined tube 31 is installed above the inclined tube sedimentation tank 3, and the second discharge port 32 is connected to an external filter press.

[0011] Furthermore, the clear water tank 4 includes a float switch 41 and a water outlet 42. The float switch 41 is connected to the control box 5, and the water outlet is located on the side wall of the clear water tank 4.

[0012] Furthermore, a drain pipe 61 is connected between the air compressor 6 and the aeration pipe 7 via a valve. The drain pipe 61 is connected to the outlet pipes of the Ca(OH)2 tank 11, the PAC tank 12, and the PAM tank 21, respectively.

[0013] According to the above technical solution, the beneficial effects of this utility model are as follows: This utility model adds an aerator to the vertical flow sedimentation tank, and uses the bubbles released by the aerator to make the sewage and the agent fully contact and mix, so that the agent can be more fully mixed into the sewage, enhancing the flocculation and sedimentation effect of the sewage. At the same time, the gas of the aerator can be used to unclog the blocked inlet pipe, solving the problem that the existing flocculant dosing cylinder is easy to clog, which affects the sewage treatment efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the wastewater treatment device;

[0015] Figure 2 This is a schematic diagram of the back structure of a wastewater treatment device;

[0016] Figure 3 This is a cross-sectional view of the internal structure of a wastewater treatment device;

[0017] 1-Coagulation tank, 11-Ca(OH)2 chemical tank, 12-PAC chemical tank, 13-Agitator, 14-Motor, 2-Vertical flow sedimentation tank, 21-PAM chemical tank, 22-Aerator, 23-Air pump, 24-Outlet 1, 3-Inclined tube sedimentation tank, 31-Inclined tube, 32-Outlet 2, 4-Clear water tank, 41-Float switch, 42-Outlet, 5-Control box, 51-pH meter, 6-Air compressor, 61-Air supply pipe. Detailed Implementation

[0018] To more clearly illustrate the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] A wastewater treatment device for the production of anti-corrosion coatings includes a coagulation tank 1, a vertical flow sedimentation tank 2, an inclined tube sedimentation tank 3, a clear water tank 4, a control box 5, an air compressor 6, and an aeration pipe 7. The tanks are separated by partitions. The coagulation tank 1 and the vertical flow sedimentation tank 2 are connected by an inlet pipe 22 above the partitions. The vertical flow sedimentation tank 2 and the inclined tube sedimentation tank 3 are connected by an outlet above the partitions. The control box 5 is installed on the side wall of the tank. The aeration pipe 7 is located inside the vertical flow sedimentation tank 2 and connected to the air compressor 6.

[0020] refer to Figure 1-3 The coagulation tank 1 is equipped with a Ca(OH)2 tank 11 and a PAC tank 12 on the outer side wall, which are connected to the inside of the tank. The coagulation tank 1 is equipped with a stirring device 13 and a motor 14. The motor 14 is mounted on a bracket above the coagulation tank 1. The stirring device 13 is connected to the motor 14. The stirring device 13 extends into the coagulation tank 1. After the sewage and the agent enter the coagulation tank, the agent is evenly dispersed in the sewage by the stirring device.

[0021] refer to Figure 1-3 A PAM chemical tank 21 is installed on the side wall outside the vertical flow sedimentation tank 2. The inlet pipe 22 extends into the vertical flow sedimentation tank 2 with the pipe opening facing downwards. A reflector plate 23 is installed at the pipe opening. The sewage outlet 24 of the vertical flow sedimentation tank 2 is opened on the bottom side wall of the tank and connected to an external filter press. The vertical flow sedimentation tank 2 is used to perform preliminary separation of sewage. The sewage flow direction entering the vertical flow sedimentation tank 2 from the lower pipe opening of the inlet pipe 22 is opposite to the particle sedimentation direction. The interception velocity is equal to the upward velocity of the water flow. Particles with an upward velocity equal to the settling velocity will be suspended in the mixed liquid to form a suspended layer, which intercepts and filters the rising particles, thereby improving the flocculation and sedimentation efficiency in the tank.

[0022] refer to Figure 1-3 The inclined tube sedimentation tank 3 includes an inclined tube 31 and a sewage outlet 32. The inclined tube 31 is installed above the inclined tube sedimentation tank 3, and the sewage outlet 32 ​​is connected to an external filter press. The sewage is further flocculated and settled in the inclined tube sedimentation tank 3. The clear water enters the clear water tank 4 after being filtered through the inclined tube above, and the sludge is discharged from the sewage outlet 32 ​​into the external filter press.

[0023] refer to Figure 1-3 The clear water tank 4 includes a float switch 41 and a water outlet 42. The float switch 41 is connected to the control box 5. The water outlet is located on the side wall of the clear water tank 4. When the clear water accumulates to a certain amount in the clear water tank, it triggers the float switch 41, causing the control box 5 to shut down the front-end operating components and suspend the sewage treatment process.

[0024] refer to Figure 1-3The air compressor 6 and the aeration pipe 7 are connected by a valve to a clearing pipe 61. The clearing pipe 61 is connected to the outlet pipes of Ca(OH)2 tank 11, PAC tank 12 and PAM tank 21 respectively. When the drug delivery pipeline is blocked, the outlet branch pipe of the air pump 23 is opened to allow the airflow to rush into the inlet pipe of the drug tank and clear the blockage.

[0025] See Figure 1-3 The control box 5 includes a box body 51 and a pH meter 52. The pH meter 52 is inserted into the coagulation tank 1. The float switch 41 and the pH meter 52 are connected to the PLC controller in the control box 5. The PLC controller is connected to each motor in the tank. The wastewater treatment device is centrally controlled by the PLC controller in the control box 5. The pH meter 52 is used to detect the wastewater in the coagulation tank 1 to ensure that the overall pH of the wastewater is within the reaction range of flocculation and sedimentation.

[0026] According to the above embodiments, the working process of this utility model is as follows:

[0027] Wastewater is fed into coagulation tank 1. Ca(OH)2 reagent is added to coagulation tank 1 through reagent tank 11 to adjust the pH of the wastewater. Once the pH value is stable within a suitable range, PAC reagent is added. Motor 14 is started to drive stirring device 13 to mix the reagent and wastewater evenly. After mixing, the inlet pipe 22 above the baffle is opened, allowing the wastewater mixed with the reagent to enter vertical flow sedimentation tank 2. Air pump 23 is started, and aerator 22 begins operation. Simultaneously, PAM reagent is added, and the reagent and wastewater undergo convective mixing. Air bubbles escaping from aeration pipe 7 disturb the wastewater, ensuring thorough mixing of the wastewater and PAM reagent, enhancing flocculation and sedimentation efficiency. After preliminary flocculation and sedimentation, the wastewater overflows from the outlet above the baffle into the inclined tube sedimentation tank. Further sedimentation occurs in sedimentation tank 3. The clear water after flocculation and sedimentation is further filtered through inclined tube 31 above inclined tube sedimentation tank 3 and overflows into clear water tank 4. Sludge is discharged from sewage outlet 32 ​​to external filter press for treatment. After clear water enters clear water tank 4, it accumulates to a certain amount and triggers float switch 41. The PLC controller in control box 5 shuts down the front-end treatment equipment, allowing clear water to be discharged. After the water level drops, float switch 41 resets, and the front-end flocculation and sedimentation process continues. If the chemical inlet pipe becomes blocked during the treatment process, the branch valve of the air outlet pipe of air compressor 6 is opened to connect the unblocking pipe 61. Compressed air pumped by air compressor 6 is used to enter the blocked pipe for unblocking.

[0028] The above-disclosed embodiments of the present invention are only for illustrating the present invention. The preferred embodiments do not describe all details exhaustively, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wastewater treatment device for the production of anti-corrosion coatings, characterized in that: It includes a coagulation tank (1), a vertical flow sedimentation tank (2), an inclined tube sedimentation tank (3), a clear water tank (4), a control box (5), an air compressor (6), and an aeration pipe (7). The tanks are separated by partitions. The coagulation tank (1) is connected to the vertical flow sedimentation tank (2) through an inlet pipe (22). The vertical flow sedimentation tank (2) and the inclined tube sedimentation tank (3) are connected through the outlet above the partition. The control box (5) is installed on the side wall of the tank. The aeration pipe (7) is set inside the vertical flow sedimentation tank (2) and connected to the air compressor (6).

2. The wastewater treatment device according to claim 1, characterized in that: The side wall outside the coagulation tank (1) is equipped with a Ca(OH)2 tank (11) and a PAC tank (12) which are connected to the inside of the tank. The coagulation tank (1) is equipped with a stirring device (13) and a motor (14). The motor (14) is installed on a bracket above the coagulation tank (1). The stirring device (13) is connected to the motor (14) and the stirring device (13) extends into the coagulation tank (1).

3. The wastewater treatment device according to claim 1, characterized in that: A PAM medicine tank (21) is installed on the side wall outside the vertical flow sedimentation tank (2). The inlet pipe (22) extends into the vertical flow sedimentation tank (2) in an L-shape with the pipe opening facing downwards. A reflector plate (23) is installed at the pipe opening. The sewage outlet (24) of the vertical flow sedimentation tank (2) is opened on the side wall of the bottom of the tank and connected to the external filter press. The aeration pipe (7) consists of two branches that extend from the side wall of the vertical flow sedimentation tank (2) into the tank below the reflector plate (23).

4. The wastewater treatment device according to claim 1, characterized in that: The inclined tube sedimentation tank (3) includes an inclined tube (31) and a second drain outlet (32). The inclined tube (31) is installed above the inclined tube sedimentation tank (3), and the second drain outlet (32) is connected to an external filter press.

5. The wastewater treatment device according to claim 1, characterized in that: The clear water tank (4) includes a float switch (41) and a water outlet (42). The float switch (41) is connected to the control box (5), and the water outlet is located on the side wall of the clear water tank (4).

6. The wastewater treatment device according to claim 1, characterized in that: The air compressor (6) and the aeration pipe (7) are connected by a drain pipe (61) through a valve. The drain pipe (61) is connected to the outlet pipes of the Ca(OH)2 tank (11), the PAC tank (12), and the PAM tank (21), respectively.

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