Novel electroplating wastewater treatment equipment based on EPSE technology

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a novel electroplating wastewater treatment equipment based on EPSE technology. The equipment includes a regulating tank with a detachable top cover. A stirring motor is mounted on the upper surface of the top cover, and the output shaft of the stirring motor passes through the top cover and is connected to a stirring shaft. A central cylinder is fitted onto the stirring shaft, and an inner spiral blade is slidably mounted inside the central cylinder. A transparent indicator cylinder is located on the outside of the regulating tank. An upper valve connects the lower end of the indicator cylinder to the upper end of the central cylinder, and a lower valve connects the lower end of the indicator cylinder to the lower end of the regulating tank. A float is slidably mounted inside the indicator cylinder, and a central hole is formed in the middle of the upper surface of the float. A transparent temporary storage cylinder is mounted on the upper end of the indicator cylinder. This invention has the following advantages: it avoids meaningless over-stirring, reduces energy consumption, shortens the residence period of wastewater in the regulating tank, improves the continuous operating efficiency of the overall treatment system, and is suitable for the wastewater treatment needs during peak electroplating production periods.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a novel electroplating wastewater treatment equipment based on EPSE technology. Background Technology

[0002] Electroplating wastewater treatment is challenging, requiring large quantities of acid-base adjusting agents and heavy metal scavenging agents, resulting in high treatment costs, low sedimentation efficiency, and difficulty in effectively removing heavy metals. Existing electroplating wastewater reuse and zero-discharge technologies suffer from unstable equipment operation, high treatment costs, and complex equipment operation and management. EPSE technology, developed by the Finnish company EPSE Technology, can be widely applied to the treatment of heavy metal pollution, including industrial wastewater, mine acidic wastewater, smelting wastewater, sediment, soil, surface water, groundwater, solid waste, landfill leachate, water quality, and air (fly ash). Based on existing EPSE technology, a new type of electroplating wastewater treatment equipment has been developed. This equipment includes a wastewater equalization tank, a pH adjustment tank, a reaction tank, and a supermagnetic separation device. First, the heavy metal wastewater is collected in the wastewater equalization tank for homogenization and quantity adjustment. Then, it enters the pH adjustment tank, where the pH is adjusted to approximately 3. The wastewater is then fed into a reaction tank where EPSE (Expanded Polystyrene) is added to react fully with the heavy metals. The reaction is rapid and complete, and under the efficient trapping effect of the EPSE, stable flocculent matter is formed. Alkali is then added to adjust the pH to approximately 9-12 (the optimal pH varies slightly depending on the heavy metal). Slow stirring is also added to form larger flocs. The wastewater then enters a supermagnetic separation unit for rapid separation of heavy metal precipitates. Finally, the resulting sludge cake is further recycled for heavy metal recovery.

[0003] The core function of a pH adjustment tank is to adjust the pH value of wastewater to a suitable range by adding acid-base adjusting agents, laying the foundation for subsequent treatment processes. The uniformity of mixing between the acid-base adjusting agents and the electroplating wastewater directly determines the accuracy of pH adjustment and the treatment effect; therefore, the stirring process is a critical step in the equipment's operation. Currently, the industry commonly uses a traditional stirring method with a motor-driven agitator. The rotation of the agitator drives the liquid flow within the tank to mix the acid-base adjusting agents with the wastewater. However, using a motor-driven agitator makes it impossible to visually assess the mixing state of the liquid within the pH adjustment tank. It's difficult to determine whether the acid-base adjusting agents have completely dissolved in the wastewater, or whether the stirring has achieved a uniform mixture. To avoid pH adjustment failure due to insufficient mixing, the industry typically adopts a conservative approach of extending the stirring time, ensuring a good mixing effect through excessive stirring.

[0004] This excessive stirring not only wastes electricity and increases the operating cost of wastewater treatment, but also prolongs the overall interval between pH adjustments, resulting in a longer residence period of wastewater in the pH adjustment tank. This, in turn, affects the continuous operating efficiency of the entire electroplating wastewater treatment system. Especially during peak electroplating production periods, when wastewater discharge increases, the problem of decreased treatment efficiency caused by excessive stirring becomes more pronounced. This can lead to a mismatch between wastewater treatment and production schedules, and even wastewater stagnation and accumulation, placing dual pressure on enterprises' environmental compliance and production operations. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a new type of electroplating wastewater treatment equipment based on EPSE technology to solve the problems mentioned in the background.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a novel electroplating wastewater treatment equipment based on EPSE technology, comprising an adjustment tank, a detachable top cover installed on the top of the adjustment tank, a stirring motor installed on the upper surface of the top cover, the output shaft of the stirring motor passing through the top cover and connected to a stirring shaft, a stirring disc installed at the lower end of the stirring shaft, a central cylinder sleeved on the stirring shaft, the upper end of the central cylinder being closed and connected to the top cover, an inner spiral blade slidably installed inside the central cylinder, the inner spiral blade being sleeved on the stirring shaft and fixedly connected to the stirring shaft, a transparent indicator cylinder provided on the outside of the adjustment tank, an upper valve connected between the lower end of the indicator cylinder and the upper end of the central cylinder, a lower valve connected between the lower end of the indicator cylinder and the lower end of the adjustment tank, a float slidably installed inside the indicator cylinder, a central hole opened at the middle position of the upper surface of the float, a transparent temporary storage cylinder installed at the upper end of the indicator cylinder, and a filling component for adding acid-base adjusting agents into the adjustment tank installed on the outer surface of the lower end of the indicator cylinder. The transparent indicator cylinder, combined with the float structure, provides a clear view of the wastewater circulation and mixing status within the regulating tank, eliminating the need for extended stirring time and avoiding energy waste. Integrating stirring, monitoring, and reagent dosing functions into one unit simplifies the equipment structure and reduces operation and maintenance complexity.

[0007] Specifically, the dispensing component includes a suction cylinder. A horizontally arranged suction cylinder is located on one side of the indicator cylinder. Graduation lines are machined on the outer surfaces of the suction cylinder, the indicator cylinder, and the temporary storage cylinder. One end of the suction cylinder is open, and a cylinder cover is connected to the open end of the suction cylinder via multiple sets of bolts. A screw hole is located in the center of one side of the cylinder cover, and a screw rod is threaded into the screw hole. One end of the screw rod extends into the suction cylinder and is fitted with a piston. The piston is slidably mounted inside the suction cylinder. A handle is installed at the end of the screw rod away from the outer side of the suction cylinder. A first valve and a second valve are connected to the end of the suction cylinder away from the cylinder cover via a three-way pipe. The end of the first valve away from the three-way pipe is connected to the lower end of the indicator cylinder. The end of the second valve away from the three-way pipe is connected to an acid-base regulating agent storage tank via a pipe. By rotating the handle to drive the piston movement, combined with the graduation lines on the suction cylinder, the amount of agent extracted and added can be controlled, avoiding over- or under-dosing of the agent. The first and second valves are connected to the acid-base adjusting agent storage tank and the indicator cylinder, respectively, allowing for switching between suction and dosing without changing the pipeline, thus improving operational efficiency. The suction cylinder and indicator cylinder are equipped with graduations, enabling rapid calculation of the dosage based on their volume ratio to the adjusting tank, providing data support for pH adjustment.

[0008] Specifically, the inner diameter of the suction cylinder is larger than that of the indicator cylinder, the inner diameter of the temporary storage cylinder is larger than that of the indicator cylinder, and the upper end of the temporary storage cylinder is open. The defined ratio of the inner diameters of the suction cylinder, indicator cylinder, and temporary storage cylinder optimizes fluid flow and metering accuracy.

[0009] Specifically, a sealing cap is bolted to the upper end of the temporary storage cylinder, and a sealing ring is installed between the sealing cap and the temporary storage cylinder. A return pipe is installed on the upper surface of the sealing cap, and the end of the return pipe away from the sealing cap passes through the upper cap and communicates with the internal space of the regulating tank. The return pipe guides the wastewater in the temporary storage cylinder back to the regulating tank, forming a circulation.

[0010] Specifically, the suction cylinder has a connecting ring at its open end, which is connected to the cylinder cover by multiple sets of bolts. One side of the cylinder cover has multiple arc-shaped openings arranged in a ring at equal intervals for ventilation. This solves the problem of air pressure balance during piston movement.

[0011] Specifically, the float has a conical column on its lower side for inserting into the central hole to change the size of the channel through which wastewater flows. The conical column is concentrically arranged with the central hole, and its diameter gradually decreases from bottom to top. A stud is installed on the lower surface of the float to ensure that the float is always above the connection point between the first valve and the indicator cylinder. A lug is fitted on the stud and installed at the lower end of the conical column. Nuts are provided on both the upper and lower sides of the lug, and the nuts are threadedly connected to the stud. Adjusting the height of the lug along the stud changes the depth to which the conical column is inserted into the central hole, thereby adjusting the cross-sectional area of ​​the central hole and controlling the wastewater return rate. When the cross-sectional area is increased, the liquid level in the temporary storage cylinder rises more slowly, corresponding to an increase in the number of wastewater circulations; conversely, the number of circulations decreases. This allows for matching different water quality treatment needs as required. The stud limit ensures that the float is always above the connection point of the first valve, preventing the float from blocking the reagent dosing channel and ensuring the normal operation of the dosing device.

[0012] Specifically, a bottom cover is installed at the lower end of the indicator cylinder, and a bent pipe connected to the lower valve is installed at the bottom of the bottom cover. A connecting pipe is installed at the end of the upper valve away from the indicator cylinder, and the end of the connecting pipe away from the upper valve passes through the regulating tank and connects to the upper end of the central cylinder. This optimizes the connection method between the indicator cylinder and the regulating tank.

[0013] Specifically, a top cover is installed at the upper end of the central cylinder, and the top cover is fitted onto the stirring shaft. A dynamic seal is installed between the top cover and the stirring shaft. Two connecting brackets are symmetrically installed on the upper surface of the top cover. The connecting brackets have an L-shaped structure, and the end of the connecting bracket away from the top cover is connected to the upper cover. The dynamic seal between the top cover and the stirring shaft prevents wastewater in the regulating tank from leaking from the upper end of the central cylinder. The L-shaped connecting brackets fix the top cover and the upper cover, preventing the central cylinder from rotating with the stirring shaft.

[0014] Specifically, each of the two parallel sides of the top cover is hinged with a movable cover. The two movable covers and the top cover together form a circular structure to seal the top of the regulating tank. A handle is installed on the upper surface of the movable cover. The movable cover is hinged to the top cover and can be easily opened by the handle, facilitating the operator to inspect and clean the stirring shaft and other components inside the regulating tank.

[0015] Specifically, the upper surface of the stirring plate is equipped with external helical blades, which are fitted onto the central cylinder with a gap between them. A drain valve is installed at the bottom of the regulating tank, and a delivery pipe is installed at the end of the drain valve furthest from the regulating tank. Multiple support legs are evenly installed at the bottom of the regulating tank. The external helical blades create a helical stirring flow field, driving the wastewater inside the tank to flow fully up and down, shortening the mixing time between the reagent and the wastewater. The drain valve and delivery pipe at the bottom of the regulating tank can quickly discharge the regulated wastewater. The support leg structure provides ample space for the installation and operation of the drain valve.

[0016] The beneficial effects of this invention are: A transparent indicator tube is installed on the outside of the regulating tank. When the stirring motor drives the stirring shaft to rotate, the inner spiral blades rotate with the stirring shaft. The rotating inner spiral blades cause the wastewater at the bottom of the regulating tank to flow upward through the central tube. Then, the wastewater in the central tube flows into the indicator tube. Since both the upper and lower valves are in the open state, the wastewater flowing into the indicator tube flows back into the regulating tank through the central hole. Because the amount of wastewater flowing through the central hole per unit time is less than the amount of wastewater flowing into the indicator tube from the central tube, some wastewater flows into the temporary storage tube. When the wastewater in the temporary storage tube reaches the set height, it indicates that the number of times the wastewater in the regulating tank has been turned up and down has reached the required level. There is no need to rely on extending the stirring time to ensure the mixing effect. This solves the problem that traditional stirring methods cannot judge the degree of mixing, avoids meaningless over-stirring, reduces power consumption, and shortens the residence period of wastewater in the regulating tank, thereby improving the continuous operation efficiency of the overall treatment system and adapting to the wastewater treatment needs during peak electroplating production periods.

[0017] Adjusting the height of the lug along the stud changes the length of the conical column inserted into the central hole. This enlarges or shrinks the channel for wastewater flow within the central hole, thus changing the amount of wastewater flowing through the central hole per unit time. Then, using a nut to limit the relative position of the stud and the conical column allows for adjustment of the relative position of the conical column and the float. When the channel for wastewater flow in the central hole enlarges, the time it takes for wastewater to reach a specific height in the temporary storage tank increases; conversely, the time it takes for wastewater to reach a specific height in the temporary storage tank decreases. This allows for adjustment of the number of cycles of wastewater churning in the regulating tank as needed. Simultaneously, the stud's position prevents the float from blocking the connection between the first valve and the indicator cylinder, facilitating the addition of acid-base adjusting agents.

[0018] The surfaces of the indicator cylinder, temporary storage cylinder, and suction cylinder are all marked with graduation lines. Based on the corresponding proportions of the internal spaces of the indicator cylinder, suction cylinder, and regulating tank, the piston driven by the screw can achieve quantitative extraction and addition of acid-base regulating agents, avoiding over- or under-addition of agents, ensuring the accuracy of pH adjustment, and laying the foundation for the full reaction of EPSE agents and heavy metals. In other words, the float and indicator cylinder work together to display the liquid level inside the regulating tank, and the known liquid level inside the regulating tank provides a data basis for the quantitative extraction and addition of acid-base regulating agents. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the novel electroplating wastewater treatment equipment based on EPSE technology of the present invention; Figure 2 This is a top view of the novel electroplating wastewater treatment equipment based on EPSE technology according to the present invention. Figure 3 for Figure 2 Sectional view of AA; Figure 4 This is a schematic diagram of the assembly of the suction cylinder, indicator cylinder, temporary storage cylinder, central cylinder and stirring motor in the novel electroplating wastewater treatment equipment based on EPSE technology of the present invention. Figure 5 This is a cross-sectional assembly diagram of the stirring shaft, central cylinder, indicator cylinder, temporary storage cylinder, and suction cylinder in the novel electroplating wastewater treatment equipment based on EPSE technology of the present invention. Figure 6 for Figure 5 Enlarged view at point B in the middle; Figure 7 This is a schematic diagram of the assembly of the outer spiral blade, inner spiral blade, stirring plate, and stirring shaft in the novel electroplating wastewater treatment equipment based on EPSE technology of the present invention. Figure 8 This is a schematic diagram of the assembly of the stud, conical column and float in the novel electroplating wastewater treatment equipment based on EPSE technology of the present invention; In the picture: 100. Regulating tank; 101. Top cover; 1011. Movable cover; 1012. Handle; 102. Support leg; 103. Drain valve; 1031. Infusion pipe; 200. Stirring motor; 201. Stirring disc; 2011. External spiral blades; 202. Stirring shaft; 300. Temporary storage cylinder; 301. Sealing cover; 3011. Return pipe; 302. Upper valve; 3021. Connecting pipe; 303. Indicator; 3031. Bottom valve; 3032, bottom cover; 304, center cylinder; 3041, top cover; 3042, connecting frame; 305, inner spiral blade; 400, suction cylinder; 401, cylinder cover; 402, screw; 4021, handle; 403, second valve; 404, first valve; 405, piston; 500, float; 501, conical column; 502, stud; 5021, nut; 5022, lug; 503, center hole. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Please see Figures 1-8This invention provides a technical solution: a novel electroplating wastewater treatment equipment based on EPSE technology, comprising an regulating tank 100, a detachable top cover 101 installed on the top of the regulating tank 100, and movable covers 1011 hinged to two parallel sides of the top cover 101. The two movable covers 1011 and the top cover 101 together form a circular structure to seal the top of the regulating tank 100. A handle 1012 is installed on the upper surface of the movable cover 1011 to provide a gripping carrier for opening and closing the movable cover 1011. A drain valve 103 is installed at the bottom of the regulating tank 100, and a delivery pipe 1031 is installed at the end of the drain valve 103 away from the regulating tank 100. Multiple support legs 102 are evenly installed at the bottom of the regulating tank 100 to support the regulating tank 100.

[0022] A stirring motor 200 is mounted on the upper surface of the cover 101. The output shaft of the stirring motor 200 passes through the cover 101 and is connected to a stirring shaft 202. A stirring disc 201 is mounted on the lower end of the stirring shaft 202. An outer spiral blade 2011 is mounted on the upper surface of the stirring disc 201. The outer spiral blade 2011 is sleeved on the central cylinder 304, and there is a gap between the outer spiral blade 2011 and the central cylinder 304. Driven by the stirring motor 200, the stirring shaft 202 drives the outer spiral blade 2011 to rotate, forming a stirring flow field, increasing the mixing speed of the acid-base regulating agent and the electroplating wastewater, and promoting the rapid diffusion of the agent.

[0023] A central cylinder 304 is fitted onto the stirring shaft 202. A top cover 3041 is installed on the upper end of the central cylinder 304, and the top cover 3041 is fitted onto the stirring shaft 202. A dynamic seal is installed between the top cover 3041 and the stirring shaft 202. Two connecting brackets 3042 are symmetrically installed on the upper surface of the top cover 3041. The connecting brackets 3042 have an L-shaped structure, so that the end of the connecting bracket 3042 away from the top cover 3041 is connected to the upper cover 101. At this time, the top cover 3041 seals the upper end of the central cylinder 304, and at the same time, the central cylinder 304 is connected to the upper cover 101, so that the central cylinder 304 does not rotate with the rotation of the stirring shaft 202.

[0024] An inner spiral blade 305 is slidably installed inside the central cylinder 304. The inner spiral blade 305 is sleeved on the stirring shaft 202 and connected and fixed to the stirring shaft 202. A transparent indicator cylinder 303 is provided on the outside of the regulating tank 100. An upper valve 302 is connected between the lower end of the indicator cylinder 303 and the upper end of the central cylinder 304, and a lower valve 3031 is connected between the lower end of the indicator cylinder 303 and the lower end of the regulating tank 100. A bottom cover 3032 is installed at the lower end of the indicator cylinder 303. A bent pipe connected to the lower valve 3031 is installed at the bottom of the bottom cover 3032. A connecting pipe 3021 is installed at the end of the upper valve 302 away from the indicator cylinder 303. The end of the connecting pipe 3021 away from the upper valve 302 passes through the regulating tank 100 and is connected to the upper end of the central cylinder 304.

[0025] A float 500 is slidably installed inside the indicator cylinder 303. A central hole 503 is provided in the middle of the upper surface of the float 500. A transparent temporary storage cylinder 300 is installed at the upper end of the indicator cylinder 303. A transparent indicator cylinder 303 is arranged on the outside of the regulating tank 100. When the stirring motor 200 drives the stirring shaft 202 to operate, the inner spiral blade 305 connected to it rotates synchronously. Under the stirring action of the inner spiral blade 305, the wastewater at the bottom of the regulating tank 100 is conveyed upward through the central cylinder 304 and then flows into the indicator cylinder 303. At this time, both the upper valve 302 and the lower valve 3031 are in the open state. The wastewater entering the indicator cylinder 303 will flow back to the regulating tank 100 through the central hole 503 on the float 500. Since the water flow rate through the central hole 503 is lower than the water delivery rate from the central cylinder 304 to the indicator cylinder 303, the excess wastewater will accumulate in the upper temporary storage cylinder 300.

[0026] The number of cycles is quantified by the fixed difference between the flow rate of the central cylinder 304 and the return flow rate of the central hole 503: When the inner spiral blade 305 rotates, the amount of wastewater delivered by the central cylinder 304 to the indicator cylinder 303 per unit time is a fixed value. The cross-sectional area of ​​the central hole 503 is kept constant after being adjusted by the conical column 501. Therefore, the volume of liquid entering the temporary storage cylinder 300 per unit time is a fixed difference.

[0027] Operators can determine the required number of cycles to achieve uniform mixing in advance through small-scale tests, based on the electroplating wastewater quality, the effective volume of the regulating tank 100, and the dosage of acid and alkali reagents. They can then calculate the corresponding preset height mark on the storage cylinder 300 based on the volume ratio. When the liquid level in the storage cylinder 300 rises to this preset height, it indicates that the wastewater in the regulating tank 100 has completed the set number of up-and-down cycles, and the mixing can be directly judged to have reached a uniform state, without relying on experience or extending the mixing time. The correspondence between the number of cycles and the uniformity of mixing can be determined through routine small-scale tests, a conventional method that can be implemented by those skilled in the art.

[0028] The upper end of the temporary storage cylinder 300 is open, and a sealing cover 301 is bolted to the upper end of the temporary storage cylinder 300. A sealing ring is installed between the sealing cover 301 and the temporary storage cylinder 300. A return pipe 3011 is installed on the upper surface of the sealing cover 301. The end of the return pipe 3011 away from the sealing cover 301 passes through the upper cover 101 and communicates with the internal space of the regulating tank 100. The temporary storage cylinder 300 and the return pipe 3011 form a closed loop structure, allowing excess wastewater to return to the regulating tank 100.

[0029] A horizontally arranged suction cylinder 400 is provided on one side of the indicator cylinder 303. The outer surfaces of the suction cylinder 400, the indicator cylinder 303, and the temporary storage cylinder 300 are all machined with graduation lines. The inner diameter of the suction cylinder 400 is larger than that of the indicator cylinder 303, and the inner diameter of the temporary storage cylinder 300 is larger than that of the indicator cylinder 303. The surfaces of the indicator cylinder 303, the temporary storage cylinder 300, and the suction cylinder 400 are all clearly marked with graduation lines. The lower end of the indicator cylinder 303 is simultaneously connected to the bottom of the regulating tank 100 via the lower valve 3031, the first valve 404 via the suction cylinder 400, and the return channel of the central hole 503 via the regulating tank 100, forming a completely interconnected structure. When adding chemicals, the acid-base adjusting agent in the suction cylinder 400 enters the lower end of the indicator cylinder 303 through the first valve 404. Under the action of gravity and the communicating vessel, it can enter 100% of the regulating tank 100 without residue or interception, ensuring controllable dosage.

[0030] Meanwhile, the indicator cylinder 303 and the regulating tank 100 are communicating vessels, and the liquid level in the indicator cylinder 303 is exactly the same as the liquid level in the regulating tank 100. The actual volume of wastewater in the regulating tank 100 can be read in real time through the scale of the indicator cylinder 303. Based on the target pH value and the current water quality, the operator calculates the theoretical dosage of the required acid-base adjusting agent according to the volume ratio, and then quantitatively extracts and adds the agent through the scale on the suction cylinder 400. After addition, stirring is started, and the mixture is considered uniform when the liquid level in the temporary storage cylinder 300 reaches the preset height. At this point, the pH value can be verified using pH detection methods, completing the adjustment. The above addition path and pH adjustment logic are clear, feasible, and represent conventional technical methods in this field.

[0031] The suction cylinder 400 has an open end, and the open end of the suction cylinder 400 is connected to the cylinder cover 401 by multiple sets of bolts. The open end of the suction cylinder 400 is connected to a connecting ring, which is connected to the cylinder cover 401 by multiple sets of bolts. Multiple arc-shaped openings for ventilation are opened on one side of the cylinder cover 401 in an annular arrangement to facilitate the movement of the piston 405 inside the suction cylinder 400.

[0032] A screw hole is provided in the middle of one side of the cylinder cover 401. A screw rod 402 is threaded into the screw hole. One end of the screw rod 402 extends into the suction cylinder 400 and is fitted with a piston 405. The piston 405 is slidably installed in the suction cylinder 400. A handle 4021 is installed at the end of the screw rod 402 away from the outside of the suction cylinder 400. The end of the suction cylinder 400 away from the cylinder cover 401 is connected to a first valve 404 and a second valve 403 through a three-way pipe. The end of the first valve 404 away from the three-way pipe is connected to the lower end of the indicator cylinder 303. The end of the second valve 403 away from the three-way pipe is connected to the acid-base regulating agent storage tank through a pipe. Open the second valve 403 and close the first valve 404. Use the handle 4021 to drive the screw 402 to rotate, so that the screw 402 drives the piston 405 to move away from the three-way pipe, thereby extracting the acid-base regulating agent in the acid-base regulating agent storage tank. Close the second valve 403 and open the first valve 404, so that the piston 405 squeezes the acid-base regulating agent in the suction cylinder 400, thereby allowing the acid-base regulating agent to enter the regulating tank 100.

[0033] The float 500 has a conical column 501 on its lower side for changing the size of the channel through which wastewater flows from the central hole 503 when inserted into the central hole 503. The conical column 501 is arranged concentrically with the central hole 503, and the diameter of the conical column 501 gradually decreases from bottom to top. A stud 502 is installed on the lower surface of the float 500 to keep the float 500 always above the connection between the first valve 404 and the indicator cylinder 303. A lug 5022 is fitted on the stud 502 and installed at the lower end of the conical column 501. Nuts 5021 are provided on both the upper and lower sides of the lug 5022 and are threadedly connected to the stud 502. The operator can move the mounting position of the support lug 5022 up and down along the stud 502 to change the depth of the conical column 501 inserted into the central hole 503 of the float 500. This operation directly adjusts the cross-sectional area of ​​the central hole 503, thereby changing the wastewater flow rate per unit time. After adjustment, tightening the nuts 5021 on both sides of the support lug 5022 locks the relative position of the conical column 501 and the float 500. When the water passage of the central hole 503 expands, the time it takes for the wastewater to fill the temporary storage cylinder 300 to the set height will increase accordingly; conversely, when the water passage narrows, this time will be shortened. In this way, the number of times the wastewater circulates in the regulating tank 100 can be adjusted as needed. At the same time, the limiting effect of the stud 502 can prevent the float 500 from moving down and blocking the connection between the first valve 404 and the indicator cylinder 303, ensuring the smooth flow of the acid-base regulating agent dosing channel.

[0034] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel electroplating wastewater treatment equipment based on EPSE technology, characterized by: The system includes a regulating tank (100), on which a removable top cover (101) is mounted. A stirring motor (200) is mounted on the upper surface of the top cover (101). The output shaft of the stirring motor (200) passes through the top cover (101) and is connected to a stirring shaft (202). A stirring disc (201) is mounted on the lower end of the stirring shaft (202). A central cylinder (304) is fitted onto the stirring shaft (202). The upper end of the central cylinder (304) is closed and connected to the top cover (101). An inner spiral blade (305) is slidably installed inside the central cylinder (304). The inner spiral blade (305) is fitted onto the stirring shaft (202) and connected to the stirring shaft (202). 202) Connection and fixation: A transparent indicator tube (303) is provided on the outside of the regulating tank (100). An upper valve (302) is connected between the lower end of the indicator tube (303) and the upper end of the central tube (304). A lower valve (3031) is connected between the lower end of the indicator tube (303) and the lower end of the regulating tank (100). A float (500) is slidably installed inside the indicator tube (303). A central hole (503) is opened in the middle of the upper surface of the float (500). A transparent temporary storage tube (300) is installed at the upper end of the indicator tube (303). A filling component for adding acid-base regulating agent into the regulating tank (100) is installed on the outer surface of the lower end of the indicator tube (303).

2. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 1, characterized in that: The filling component includes a suction cylinder (400). A suction cylinder (400) is arranged laterally on one side of the indicator cylinder (303). The outer surfaces of the suction cylinder (400), the indicator cylinder (303), and the temporary storage cylinder (300) are all machined with scale lines. One end of the suction cylinder (400) is open. The open end of the suction cylinder (400) is connected to a cylinder cover (401) by multiple sets of bolts. A screw hole is opened in the middle of one side of the cylinder cover (401). A screw rod (402) is threaded into the screw hole. One end of the screw rod (402) extends to the suction cylinder (400). A piston (405) is installed inside the suction cylinder (400). The piston (405) is slidably installed inside the suction cylinder (400). A handle (4021) is installed at the end of the screw (402) away from the outside of the suction cylinder (400). The end of the suction cylinder (400) away from the cylinder cover (401) is connected to a first valve (404) and a second valve (403) through a three-way pipe. The end of the first valve (404) away from the three-way pipe is connected to the lower end of the indicator cylinder (303). The end of the second valve (403) away from the three-way pipe is connected to the acid-base regulating agent storage tank through a pipe.

3. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 2, characterized in that: The inner diameter of the suction cylinder (400) is larger than the inner diameter of the indicator cylinder (303), the inner diameter of the temporary storage cylinder (300) is larger than the inner diameter of the indicator cylinder (303), and the upper end of the temporary storage cylinder (300) is open.

4. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 3, characterized in that: The upper end of the temporary storage cylinder (300) is connected to a sealing cap (301) by bolts. A sealing ring is installed between the sealing cap (301) and the temporary storage cylinder (300). A return pipe (3011) is installed on the upper surface of the sealing cap (301). The end of the return pipe (3011) away from the sealing cap (301) passes through the upper cover (101) and communicates with the internal space of the regulating tank (100).

5. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 4, characterized in that: The suction cylinder (400) has a connecting ring at its open end. The connecting ring is connected to the cylinder cover (401) by multiple sets of bolts. The cylinder cover (401) has multiple arc-shaped openings arranged in a ring at equal intervals on one side for ventilation.

6. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 5, characterized in that: The float (500) is provided with a conical column (501) on its lower side for being inserted into the central hole (503) to change the size of the channel through which wastewater flows from the central hole (503). The conical column (501) is arranged concentrically with the central hole (503). The diameter of the conical column (501) gradually decreases from bottom to top. A stud (502) is installed on the lower surface of the float (500) to keep the float (500) always above the connection between the first valve (404) and the indicator cylinder (303). A lug (5022) is sleeved on the stud (502). The lug (5022) is installed at the lower end of the conical column (501). Nuts (5021) are provided on both the upper and lower sides of the lug (5022). The nuts (5021) are threadedly connected to the stud (502).

7. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 1, characterized in that: The lower end of the indicator cylinder (303) is equipped with a bottom cover (3032), and the bottom of the bottom cover (3032) is equipped with a bent pipe connected to the lower valve (3031). The upper valve (302) is equipped with a connecting pipe (3021) at the end away from the indicator cylinder (303). The end of the connecting pipe (3021) away from the upper valve (302) passes through the regulating tank (100) and is connected to the upper end of the central cylinder (304).

8. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 7, characterized in that: The top cover (3041) is installed on the upper end of the central cylinder (304). The top cover (3041) is sleeved on the stirring shaft (202). A dynamic seal is installed between the top cover (3041) and the stirring shaft (202). Two connecting brackets (3042) are symmetrically installed on the upper surface of the top cover (3041). The connecting brackets (3042) are L-shaped structures. The end of the connecting bracket (3042) away from the top cover (3041) is connected to the upper cover (101).

9. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 8, characterized in that: The upper cover (101) has two movable covers (1011) hinged to its two parallel sides. The two movable covers (1011) together with the upper cover (101) form a circular structure to seal the top of the regulating tank (100). A handle (1012) is installed on the upper surface of the movable cover (1011).

10. The novel electroplating wastewater treatment equipment based on EPSE technology according to claim 1, characterized in that: The upper surface of the stirring plate (201) is equipped with an outer spiral blade (2011), which is sleeved on the central cylinder (304). There is a gap between the outer spiral blade (2011) and the central cylinder (304). The bottom of the regulating tank (100) is equipped with a drain valve (103), and an infusion pipe (1031) is installed at the end of the drain valve (103) away from the regulating tank (100). Multiple support legs (102) are evenly installed at the bottom of the regulating tank (100).

Images