A water film protection device, a water treatment device and a use method

Abstract

The application discloses a water film protection device, a matched water treatment device and a use method, and belongs to the technical field of sewage treatment equipment, and comprises a water film reaction component, wherein the water film reaction component comprises a semi-permeable membrane, the outer surface of the semi-permeable membrane is provided with first protrusions, the first protrusions are uniformly distributed along the circumferential direction of the outer surface of the semi-permeable membrane, flow channels are arranged between adjacent first protrusions, the flow channels are matched with second protrusions, and the second protrusions are located on the inner surface of a reaction pool shell; a drain port is formed in the bottom of the reaction pool shell, the semi-permeable membrane and the reaction pool shell are combined to form a cavity; the reaction pool shell is further provided with a transparent observation port, which is used for observing whether the water flow state in the cavity is laminar flow, the direct corrosion of corrosive wastewater on the shell of the device is isolated by using the water film, meanwhile, the reaction ions of the medicament can better enter the wastewater for reaction by using the semi-permeable membrane, the service life of the semi-permeable membrane is effectively prolonged by the continuous flushing of the water flow on the surface of the semi-permeable membrane, and the maintenance and regeneration of the semi-permeable membrane are facilitated.

Description

Technical Field

[0001] This invention belongs to the technical field of sewage treatment equipment, specifically relating to a water film protection device, a matching water treatment device, and a method of use. Background Technology

[0002] Wastewater treatment refers to the physical, chemical, and biological treatment of wastewater and sewage, aiming to remove or reduce pollutants in wastewater and treat it to meet environmental water quality standards for safe discharge or recycling. However, some sewage is corrosive, and conventional water treatment equipment will be corroded to varying degrees when treating such sewage. Conventional anti-corrosion methods cannot be effectively applied to water treatment equipment, especially small integrated sewage treatment devices. Such water treatment equipment only has an anti-corrosion layer sprayed on before use, and damage to the anti-corrosion layer during use cannot be detected in time. By the time it is discovered, the equipment has already suffered relatively serious corrosion.

[0003] A search revealed that invention CN113198285B discloses a corrosion-resistant sewage treatment container, relating to the field of sewage treatment technology. The key technical points of the solution are: it includes a container body and a sewage treatment system. Sewage flows through a sewage delivery pipe within the system. The container body has pipe and wiring channels, both with anti-corrosion layers on their outer walls. Both channels are connected to a circulating air supply device. A suction fan is located on the top of the container body and connected to a purification device. An air supply jacket is located inside the container body, containing a fresh air device for supplying fresh air to the container. The surface of the air supply jacket near the interior of the container body has an openable and closable ventilation mesh structure. However, this solution does not effectively solve the problem of corrosion of the sewage treatment device by corrosive sewage.

[0004] According to the search, the invention with publication number CN107001668B discloses a polymer ion-permeable membrane, a composite ion-permeable membrane, an electrolyte membrane for batteries and an electrode composite, which can unidirectionally transmit composite ions. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a water film protection device, a matching water treatment device and a method of use to solve the problems mentioned in the background art or to achieve better technical effects.

[0006] The system includes a water film reaction component, comprising a semi-permeable membrane. A first protrusion is formed on the outer surface of the semi-permeable membrane, evenly distributed along its circumference. A flow channel is formed between adjacent first protrusions, and a second protrusion mates with the flow channel. The second protrusion is not fully embedded in the flow channel, leaving a space between it and the flow channel to allow water to flow through and form a water film. The second protrusion is located on the inner surface of the reaction tank shell. A drain outlet is provided at the bottom of the reaction tank shell. The semi-permeable membrane and the reaction tank shell together form a cavity. The reaction tank shell also has a transparent observation port for observing whether the water flow inside the cavity is laminar. The system also includes a water ejector capable of controlling the water flow. The jet speed, combined with a sensor mounted on the second protrusion on the inner side of the reaction tank shell, is controlled and adjusted in real time to maintain the water flow in a laminar state, i.e., the ratio of the average flow velocity to the maximum flow velocity is equal to 0.5. The nozzle of the jet injector extends into the cavity at the end furthest from the ground, and the end of the jet injector furthest from the reaction tank shell is connected to a water film supply pipe. The water film isolates the device shell from direct corrosion by corrosive wastewater, while the use of a semi-permeable membrane allows the reaction ions of the reagent to better enter the wastewater for reaction. Furthermore, the continuous scouring of the semi-permeable membrane surface by the water flow effectively extends the service life of the semi-permeable membrane and is beneficial for its maintenance and regeneration.

[0007] Furthermore, the types of ions that a semipermeable membrane can pass through are determined by the neutralizing agent required for the corrosive wastewater being treated. Different types of neutralizing agents require different types of semipermeable membranes to allow different types of ions to pass through. During the reaction, a high concentration of neutralizing ions exists in the water film. Due to osmotic pressure, corrosive ions cannot pass through the semipermeable membrane into the water film.

[0008] Furthermore, a movable sealing component is provided at one end of the semi-permeable membrane near the water ejector. The movable sealing component includes a sealing slider. A water storage hopper is installed at one end of the sealing slider near the semi-permeable membrane, and a spring is installed at the other end. The spring connects the outer shell of the reaction tank and the sealing slider. The sealing slider is fitted with a sliding groove, and water permeable holes are opened on the lower surface of the sliding groove. The movable sealing component serves as a safety device.

[0009] Furthermore, the water ejector corresponds one-to-one with the cavity, and the semi-permeable membrane is movably connected to the outer shell of the reaction tank. A third protrusion is provided at the end of the semi-permeable membrane away from the ground, and a through hole is opened in the center of the third protrusion. A fixing rod is fitted to the through hole, and rubber protective sleeves are installed at both ends of the fixing rod. The semi-permeable membrane can be detachably connected, ensuring that it can be used on wastewater with different components and corresponding neutralizing agents, thus improving the applicability of the device.

[0010] It also includes a water film supply component, which consists of a housing with a return water inlet pipe connected to the bottom, and a water film outlet pipe and a water film supply pipe connected to the outer surface of the housing. An agitator is installed inside the housing, with a cavity inside. A dosing port is connected to the top of the agitator, and a bearing is installed at the connection between the agitator and the dosing port. A through hole is opened at the end of the agitator near the ground, and a stirring motor is installed on the top of the housing. Neutralizing agents are added directly to the water film, allowing neutralized ions in the water film to directly pass through the semi-permeable membrane and react in the wastewater, accelerating the reaction efficiency. No additional dosing mechanism or agitator is needed, reducing the size of the device. Additionally, a natural, biodegradable dye can be added to the water in the supply component, allowing staff to observe the water flow within the cavity.

[0011] It also includes a water film supply pump, the inlet of which is connected to the water film supply pipe, and the outlet of which is connected to the water film inlet pipe. The water film inlet pipe extends towards the water film protection device and passes through the outer shell to connect to the water film supply pipe. A separate water pump supplies water to the water film, improving the stability of the water film protection device.

[0012] Furthermore, when the device encounters an overflow, the water flow in the reaction tank rises and gradually overflows the storage hopper. The wastewater in the storage hopper gradually increases, and under the action of gravity, it overcomes the elastic force of the spring and moves along the chute towards the outer shell of the reaction tank, releasing the blockage. The wastewater flows into the cavity through the permeable holes on the lower surface of the chute and eventually enters the water film. When the wastewater enters the water film, the reagents in the water film react directly with the wastewater, reducing its corrosiveness. At the same time, it carries the wastewater into the drain outlet and into the water film supply component through the wastewater return pipe. As wastewater continuously enters, the water level inside the water film sealing component continuously rises. The water level rises and eventually reaches the alarm line. At this point, the component issues an alarm and simultaneously activates the sewage return pipe, sewage return pump, and lift pump. The water in the water film sealing component is sent through the sewage return pipe to the wastewater inlet pipe and discharged back into the reaction tank. At this time, the high concentration of water in the water film directly enters the reaction tank and reacts with the sewage. At the same time, the lift pump starts to lift the sewage to the sedimentation tank for the next reaction until the liquid level in the reaction tank returns to the normal level. After the lift pump lifts the excess sewage to the sedimentation tank, the sludge discharge pipe is temporarily opened to discharge sludge and release some space to accommodate sewage for reaction.

[0013] When an overflow occurs, the water circulation through the water film supply component and the water film protection component further expands the buffer volume of the reaction tank. At the same time, the high-concentration neutralizing agent reacts directly, minimizing the corrosiveness of the wastewater and reducing corrosion to the equipment.

[0014] It also includes an outer shell, with an aerator installed at the top. The aeration port of the aerator extends into the sedimentation tank. Guide plates and baffles are set around the aeration port. A guide channel is set between the guide plates and baffles. A partition plate is installed at the end of the guide plate near the ground. An overflow weir is set on the outer surface of the shell, and the overflow weir is connected to an outlet pipe. The sedimentation tank used in conjunction with it further improves the treatment efficiency of wastewater. When there are other impurities in the wastewater, it can be further purified.

[0015] Furthermore, all components and pumps are electrically connected to a data terminal, which can directly control each component and the water pump.

[0016] Furthermore, a vent pipe is provided at the bottom of the outer shell, and a valve is provided at the connection between the vent pipe and the sedimentation tank. A sludge discharge pipe is provided at the bottom of the sedimentation tank.

[0017] Furthermore, it also includes a booster pump, which is connected to a booster pipe. A dosing machine is installed between the booster pump and the booster pipe. The booster pipe extends towards the sedimentation tank and passes through the outer shell to enter the sedimentation tank. A filter screen is installed at the outlet of the booster pipe that extends into the sedimentation tank.

[0018] Furthermore, the dosing machine is equipped with a stirring rod inside, a sampling port at the top, and an active window at the corresponding position on the outer casing. By increasing the water pump to agitate the wastewater, the reaction efficiency of the neutralizing agent is accelerated. The sampling port on the dosing machine can effectively ensure the complete occurrence of the reaction, which is conducive to the staff to monitor the reaction rate in real time and make timely adjustments. At the same time, if other agents are needed in subsequent processes, they can also be added and stirred again through the dosing machine, which is more convenient.

[0019] Furthermore, the water film protection device can be used as a reaction tank for neutralization reactions and can be integrated with other wastewater treatment devices for subsequent treatment.

[0020] A water treatment method, characterized by comprising the following steps:

[0021] S1. Prepare the water film; supply water to the water film supply component to the specified scale and add dye to indicate the water flow status, open the water film outlet pipe and water film supply pipe, close the return water inlet pipe, start the water film supply pump to supply water to the ejector, and start the ejector to initially form a water film to fill the cavity.

[0022] S2. Adjust the water film; use a water jet to control the water flow speed and control the nozzle of the water jet to be oriented to a suitable position. The water flows in a laminar state into the cavity formed by the first protrusion of the semi-permeable membrane and the second protrusion on the inner surface of the reaction tank shell, and flows on the flow channel to form a stable flowing water film, which washes the semi-permeable membrane and the reaction tank shell. As the water film moves downward, its speed increases under the action of gravity, and it may break away from the laminar flow state. At this time, the gap between the first protrusion and the flow channel gradually increases. The total water volume remains unchanged, the cross-sectional water flow rate increases, and the flow velocity decreases to prevent the flow velocity from accelerating and breaking away from the laminar flow state until it enters the bottom drain outlet and is discharged. Observe the flow state of the dyeing water through the transparent observation window on the reaction tank shell, and at the same time check whether the water flow velocity in the water film outlet pipe reaches the specified range.

[0023] S3. Add neutralizing agent; Based on the chemical properties of the wastewater, select a suitable neutralizing agent and add it into the cavity inside the stirring rod through the dosing port. Start the stirring motor, and the neutralizing agent inside the stirring rod will be gradually released into the water through the through hole under the action of centrifugal force. Wait for a period of time until the concentration of the neutralizing agent inside the water film supply component reaches the specified range.

[0024] S4. Water intake and start the water treatment device: Open the wastewater inlet pipe, and the sewage enters the reaction tank and comes into direct contact with the semi-permeable membrane. The cavity between the semi-permeable membrane and the outer shell of the reaction tank is covered with a water film containing a high concentration of neutralized ions. The semi-permeable membrane only allows neutralized ions to pass through and react with the wastewater. After a period of time, start the lift pump to lift the wastewater after the reaction and add it directly to the reagent machine for sampling and testing. If it meets the standard, proceed to the next step; if it does not meet the standard, continue the reaction for a period of time.

[0025] S5. Add flocculant; If the wastewater is only corrosive, there is no need to add chemicals again. It can be directly sent to the sedimentation tank through the lifting pipe. If it contains other impurities, add the corresponding flocculant in the dosing machine and stir it. Then send it to the sedimentation tank through the lifting pipe.

[0026] S6. Air flotation sedimentation; After the water level in the sedimentation tank reaches the corresponding position, the aerator is started. The aeration port releases a large number of air bubbles into the water to impact the water flow. At the same time, the lifting pipe continuously releases water flow towards the aerator. The water flow and air bubbles mix and spread around the aerator nozzle. Due to the restriction of the guide plate, most of the foam moves towards the bottom of the tank and continues to move towards the aerator with the water flow in the lifting pipe. Some foam crosses the guide plate and continues to spread around, and is eventually intercepted by the mud baffle and enters the guide channel. The foam is broken by the impact of subsequent foam in the guide channel, and the sediment sinks. During the sinking process, it moves along the partition plate to the sedimentation area. The upper clear liquid gradually overflows the overflow weir and enters the outlet pipe for discharge.

[0027] S7; Sludge Discharge Maintenance: After the unit has been operating for a period of time, sludge discharge maintenance is required. During sludge discharge, open the sludge discharge pipe to discharge the sludge settled at the bottom of the sedimentation tank along with the sludge-containing wastewater. After discharge, perform sludge dewatering treatment. When the sludge is basically discharged, close the sludge discharge pipe and aerator, and open the vent pipe to discharge the wastewater in the sedimentation tank to other wastewater treatment devices. At the same time, the lift pump lifts the wastewater in the reaction tank to the sedimentation tank for discharge. At this time, the water membrane protection device continues to operate until the wastewater in the reaction tank is basically discharged. The return water is fed into the reaction tank through the wastewater inlet pipe for rinsing, and then lifted to the sedimentation tank for discharge by the lift pump. Repeat the rinsing until the wastewater residue in the reaction tank is within the standard range. Close the wastewater inlet pipe and the lift pump, and finally close the water membrane protection device, drain the water flow in the cavity, and close the water membrane outlet pipe and water membrane supply pipe. Inspect the semi-permeable membrane and perform maintenance.

[0028] Furthermore, the method of using the water film protection device in the event of an overflow accident includes the following steps;

[0029] S1. Activate the movable sealing component; When wastewater exceeding the buffer volume enters the reaction tank, the water level in the reaction tank gradually rises. When the water level rises to the point of overflowing the water storage hopper and entering, the water volume in the water storage hopper gradually increases. Under the action of gravity, the water flow and the water storage hopper cause the sealing block to move along the slide towards the outer shell of the reaction tank. The wastewater flows into the slide and enters the water film in the cavity through the water permeable holes on the lower surface of the slide.

[0030] S2. Open the sewage return valve; the sewage enters the cavity and mixes with the water film. The sewage mixes with the chemicals in the water film to neutralize the corrosiveness, and then reaches the drain outlet together with the water film. It then passes through the water film outlet pipe to the inside of the water film supply component. The sewage continuously flows in to form mixed sewage, and the water level inside the water film supply component rises continuously until it reaches the alarm line. After reaching the alarm line, the component issues an alarm and simultaneously opens the sewage return pipe, the lift pump, and the sewage return pump. The sewage return pump sends the mixed sewage inside the water film supply component to the wastewater inlet pipe through the sewage return pipe, and flows back into the reaction tank to form a mixed sewage circulation. The high-concentration neutralizing agent in the water film supply component directly enters the reaction tank to react with the sewage.

[0031] S3. Open the sludge discharge pipe; At the same time as the booster pump starts, the sludge discharge pipe starts to discharge the muddy sewage and sludge from the bottom of the reaction tank, leaving a buffer in the sedimentation tank. After leaving a buffer volume, close the sludge discharge pipe.

[0032] S4. Backwashing: After the overflow sewage has been mixed and circulated for a period of time, the water level inside the water film supply component drops to the normal water level, and after the sewage in this pool has been basically treated, the return water inlet pipe is opened to let clean water into the component to circulate the mixed sewage, continuously diluting the mixed sewage and rinsing the component and cavity, and then carrying out subsequent maintenance.

[0033] Compared with the prior art, the present invention can achieve the following technical effects:

[0034] A drain outlet is located at the bottom of the reaction tank shell. The semi-permeable membrane and the reaction tank shell together form a cavity. A water jet injector controls the speed of the water jet, and in conjunction with a sensor mounted on the second protrusion on the inner side of the reaction tank shell, it controls and adjusts the water flow speed in real time, ensuring the water flow remains in a laminar state. The reaction tank shell also has a transparent observation port to observe whether the water flow inside the cavity is laminar. A water film is used to isolate the device shell from direct corrosion by corrosive wastewater, while the semi-permeable membrane allows the reactant ions to better enter the wastewater for reaction. Furthermore, the continuous water flow washes away the semi-permeable membrane... The membrane surface effectively extends the service life of the semipermeable membrane, which is beneficial for its maintenance and regeneration. The semipermeable membrane is detachable, ensuring that it can be used with wastewater of different compositions and corresponding neutralizing agents, thus improving the applicability of the device. Neutralizing agents can be added directly to the water membrane, allowing the neutralized ions in the water membrane to pass directly through the semipermeable membrane into the wastewater for reaction, accelerating the reaction efficiency. No additional dosing mechanism or agitator is required, reducing the size of the device. At the same time, natural biodegradable dyes can be added to the water in the supply component, so that the staff can observe the flow of water in the cavity.

[0035] The accompanying sedimentation tank further improves the wastewater treatment efficiency. When other impurities are present in the wastewater, it can be further purified. The dosing machine is equipped with a stirring rod inside and a sampling port at the top. The outer shell has an active window at the corresponding position of the dosing machine. By raising the water pump to agitate the wastewater, the reaction efficiency of the neutralizing agent is accelerated. The sampling port on the dosing machine can effectively ensure that the reaction occurs completely, which is conducive to the staff to monitor the reaction rate in real time and make timely adjustments. At the same time, if other agents are needed in subsequent processes, they can also be added and stirred again through the dosing machine, which is more convenient.

[0036] The water circulation between the water film protection components and the water film supply components can expand the buffer volume of the reaction tank in the event of an overflow accident, while minimizing the corrosiveness of the wastewater and reducing the losses caused by the overflow accident. Attached Figure Description

[0037] Figure 1 This is a cross-sectional view of the structure of the present invention;

[0038] Figure 2 This is a cross-sectional view of the water film protection device.

[0039] Figure 3 This is a top view of the water film protection component;

[0040] Figure 4 This is a schematic diagram of the front structure of the semi-permeable membrane;

[0041] Figure 5This is a schematic diagram of the bottom structure of the semi-permeable membrane;

[0042] Figure 6 This is a cross-sectional view of the water film protection component structure;

[0043] Figure 7 This is an enlarged view of part A;

[0044] Figure 8 This is a cross-sectional view of the water film supply component.

[0045] Figure 9 This is a cross-sectional view of the stirring rod structure;

[0046] Figure 10 This is a cross-sectional view of the water treatment device.

[0047] In the diagram: 1. Outer shell; 101. Wastewater inlet pipe; 102. Filter tank; 103. Vent pipe; 104. Sludge discharge pipe; 105. Outlet pipe; 106. Overflow weir; 107. Aerator; 108. Return water inlet pipe; 1081. Sewage return pipe; 109. Water film outlet pipe; 1010. Water film water supply pump; 1011. Water film water supply pipe; 1012. Stirring rod; 1013. Chemical dosing port; 1014. Stirring motor; 1015. Bearing; 1016. Blade; 1017. Through hole; 1 018. Water film inlet pipe, 2. Semi-permeable membrane, 201 First protrusion, 202. Flow channel, 203. Water ejector, 204. Water film supply pipe, 205. Lifting water pump, 206. Third protrusion, 207. Fixing rod, 208. Rubber protective sleeve, 209. Liquid storage hopper, 2010. Sealing block, 2011. Water permeable hole, 2012. Spring, 3. Reaction tank shell, 301. Second protrusion, 302. Drain outlet, 4. Mud baffle, 5. Divider plate, 6. Guide plate, 7. Guide channel, 8. Lifting water pipe. Detailed Implementation

[0048] Example 1

[0049] like Figure 1-10 As shown:

[0050] A water film protection device includes a water film reaction component, comprising a semi-permeable membrane 2, with first protrusions 201 evenly distributed along the circumferential direction of the outer surface of the semi-permeable membrane 2 on its outer surface. A flow channel 202 is provided between adjacent first protrusions 201, and a second protrusion 301 is fitted into the flow channel 202. The second protrusion 301 is located on the inner surface of the reaction tank shell 3. A drain outlet is provided at the bottom of the reaction tank shell 3. The flow channel 202 on the semi-permeable membrane 2 and the second protrusion 301 on the reaction tank shell 3 combine to form a cavity. The device also includes a water ejector 203. 3. The nozzle extends into the cavity at the end away from the ground. The end of the water ejector 203 away from the outer shell 3 of the reaction tank is connected to a water film supply pipe 204. The semi-permeable membrane 2 is provided with a movable sealing component at the end near the water ejector 203. The movable sealing component includes a sealing slider 2010. A water storage tank 209 is installed at the end of the sealing slider 2010 near the semi-permeable membrane 2, and a spring 2012 is installed at the other end. The spring 2012 connects the outer shell 3 of the reaction tank and the sealing slider 20110. The sealing slider 2010 is fitted with a sliding groove, and a water permeable hole 2011 is opened on the lower surface of the sliding groove.

[0051] The water ejector 203 corresponds to the cavity one by one. The semi-permeable membrane 2 is movably connected to the outer shell 3 of the reaction tank. A third protrusion 206 is provided at the end of the semi-permeable membrane 2 away from the ground. A through hole is opened in the center of the third protrusion 206. A fixing rod 207 is fitted to the through hole. Rubber protective sleeves 208 are installed at both ends of the fixing rod 207 to prevent sewage from corroding the fixing rod 207 and causing the semi-permeable membrane 2 to fall off.

[0052] It also includes a water film supply component, which includes a housing 1. The bottom of the housing 1 is connected to a return water inlet pipe 108. The outer surface of the housing 1 is connected to a water film outlet pipe 109 and a water film supply pipe 1011. A stirring rod 1012 is installed inside the housing 1. The stirring rod 1012 has a cavity inside. The top of the stirring rod 1012 is connected to a dosing port 1013. A bearing 1015 is installed at the connection between the stirring rod 1012 and the dosing port 1013. A through hole 1017 is opened at the end of the stirring rod 1012 near the ground. A stirring motor 1014 is installed on the top of the housing 1.

[0053] It also includes a water film water supply pump 1010, the inlet of which is connected to a water film water supply pipe 1011, and the outlet of which is connected to a water film water inlet pipe 1018. The water film water inlet pipe 1018 extends toward the direction of the water film protective device and passes through the outer shell 1 to connect to the water film water supply pipe 204.

[0054] A water treatment device, used in conjunction with a water film protection device, includes a housing 1. An aerator 107 is installed at the top of the housing 1. The aeration port at the lower end of the aerator 107 extends into a sedimentation tank. A guide plate 6 and a mud baffle 4 are arranged around the aeration port. A guide channel 7 is arranged between the guide plate 6 and the mud baffle 4. A partition plate 5 is installed at the end of the guide plate 6 near the ground. An overflow weir 106 is provided on the outer surface of the housing 1. The overflow weir 106 is connected to a water outlet pipe 105.

[0055] The bottom of the outer shell 1 is provided with a vent pipe 103, and a valve is provided at the connection between the vent pipe 103 and the sedimentation tank. The bottom of the sedimentation tank is provided with a sludge discharge pipe 104.

[0056] It also includes a booster pump 205, which is connected to a booster pipe 8. A dosing machine 206 is installed between the booster pump 205 and the booster pipe 8. The booster pipe 8 extends towards the sedimentation tank and passes through the outer shell 1 into the sedimentation tank. A filter screen is installed at the outlet of the part of the booster pipe 8 that extends into the sedimentation tank.

[0057] The dosing machine 206 is equipped with a stirring rod inside, a sampling port is provided at the top of the dosing machine, and an active window is provided in the outer shell 1 at the corresponding position of the dosing machine.

[0058] Example 2

[0059] A water treatment method includes the following steps:

[0060] S1. Prepare water film; supply water to the water film supply component to the specified scale, open the water film outlet pipe 109 and the water film supply pipe 1011, close the return water inlet pipe 108, start the water film supply pump 1010 to supply water to the water ejector 203, and start the water ejector 203 to initially form a water film to fill the cavity.

[0061] S2. Adjust the water film; use the water jet 203 to control the water flow speed, control the nozzle of the water jet 203 to be oriented to a suitable position, and the water flow enters the cavity formed by the first protrusion 201 of the semi-permeable membrane 2 and the second protrusion 301 on the inner surface of the reaction tank shell 3 in a laminar flow state and flows on the flow channel 202 to form a stable water film. As the water film moves downward, its speed increases under the action of gravity, and it may break away from the laminar flow state. At this time, the gap between the first protrusion 201 and the flow channel 202 gradually increases, the water flow rate increases, and the flow velocity decreases to avoid breaking away from the laminar flow state until it enters the bottom drain outlet and is discharged. At the same time, check whether the water flow velocity in the water film outlet pipe 109 reaches the specified range.

[0062] S3. Add neutralizing agent; Select a suitable neutralizing agent according to the chemical properties of the wastewater, and put the neutralizing agent into the internal cavity of the stirring rod 1012 through the dosing port 1013. Start the stirring motor 1014. Under the action of centrifugal force, the neutralizing agent inside the stirring rod 1014 is gradually released into the water through the through hole 1017. Wait for a period of time until the concentration of the neutralizing agent inside the water film supply component reaches the specified range.

[0063] S4. Water intake and start the water treatment device: Open the wastewater inlet pipe 101, and the sewage enters the reaction tank and comes into direct contact with the semi-permeable membrane 2. The cavity between the semi-permeable membrane 2 and the outer shell 3 of the reaction tank is covered with a water film containing a high concentration of neutralizing ions. The semi-permeable membrane 2 only allows neutralizing ions to pass through and react with the wastewater. After neutralizing the wastewater, the lift pump 205 is started to lift the wastewater after the reaction and add it directly to the reagent machine 206 for sampling and testing. If it meets the standard, proceed to the next step; if it does not meet the standard, continue the reaction for a period of time.

[0064] S5. Add flocculant; If the wastewater is only corrosive, there is no need to add chemicals again. It can be directly sent to the sedimentation tank through the lifting pipe. If it contains other impurities, add the corresponding flocculant in the dosing machine 206 and stir it. Then send it to the sedimentation tank through the lifting pipe.

[0065] S6. Air flotation sedimentation; After the water level in the sedimentation tank reaches the corresponding position, the aerator 107 is started. The aeration port releases a large number of air bubbles into the water to impact the water flow. At the same time, the lifting pipe 8 continuously releases water flow towards the aerator. The water flow and air bubbles mix and spread around the aerator nozzle. Due to the restriction of the guide plate 6, most of the foam moves towards the bottom of the tank and continues to move towards the aerator with the water flow from the lifting pipe. Some foam crosses the guide plate 6 and continues to spread around, and is eventually intercepted by the mud baffle 4 and enters the guide channel 7. The foam is broken by the impact of subsequent foam in the guide channel 7, and the sediment sinks. During the sinking process, it moves along the partition plate 5 to the sedimentation area. The upper clear liquid gradually overflows the overflow weir 106 and enters the outlet pipe for discharge.

[0066] S7. Sludge Discharge Maintenance: After the unit has been operating for a period of time, sludge discharge maintenance is required. During sludge discharge, open the sludge discharge pipe 104 to discharge the sludge settled at the bottom of the sedimentation tank along with the sludge-containing wastewater. After discharge, perform sludge dewatering treatment. When the sludge is basically discharged, close the sludge discharge pipe 104 and the aerator 107, and open the vent pipe 103 to discharge the wastewater in the sedimentation tank to other wastewater treatment devices. At the same time, the lift pump 205 lifts the wastewater in the reaction tank to the sedimentation tank for discharge. At this time, the water membrane protection device continues to operate until the wastewater in the reaction tank is basically discharged. The return water is fed into the reaction tank through the wastewater inlet pipe 101 for rinsing, and then lifted to the sedimentation tank for discharge by the lift pump 205. Repeat the rinsing until the wastewater residue in the reaction tank is within the standard range. Close the wastewater inlet pipe 101 and the lift pump 205, and finally close the water membrane protection device to discharge the water flow in the cavity. Close the water membrane outlet pipe 109 and the water membrane supply pipe 1011, check the semi-permeable membrane and perform maintenance.

[0067] Example 3

[0068] The ejector 203 controls the outflow velocity and impact direction of the water flow, ensuring that the water remains in a laminar flow state after exiting the ejector 203. At this point, the cavity is filled with water, and the water flows in the channel, continuously scouring the outer surface of the semi-permeable membrane 2 and the inner surface of the reaction tank shell 3. The water flows downward along the channel 202 under the action of gravity, and the flow velocity gradually increases. At this time, the gap between the channel 202 and the second protrusion 301 gradually widens, increasing the flow rate through a single cross-section while maintaining the total water volume. The flow velocity decreases to offset the increased flow velocity caused by gravity, preventing the water from deviating from the laminar flow state during the flow process. In laminar flow conditions, the water flow velocity is the same at the same cross-section, which can better flush the semi-permeable membrane 2 and the outer shell 3 of the reaction tank. When treating corrosive wastewater, it can effectively prevent the wastewater from corroding inside the equipment. Furthermore, if the semi-permeable membrane 2 is damaged due to negligence by the staff, and corrosive wastewater seeps out, the water film isolates the air from the reaction of the corrosive wastewater on the outer shell 3 of the reaction tank. At the same time, the continuous flushing of the water flow prevents the wastewater from staying in one place for a long time, thus avoiding more serious corrosion. Furthermore, a neutralizing agent is added to the water film, so that the corrosive wastewater reacts with the agent in the water film when it seeps out, neutralizing its corrosiveness.

[0069] Example 4

[0070] One method of using a water film protection device in the event of an overflow accident includes the following steps;

[0071] S1. Activate the movable sealing component; When wastewater exceeding the buffer volume enters the reaction tank, the water level in the reaction tank gradually rises. When the water level rises to overflow the water storage hopper 209 and enters, the water volume in the water storage hopper 209 gradually increases. Under the action of gravity, the water flow and the water storage hopper 209 cause the sealing block 2010 to move along the slide towards the outer shell of the reaction tank. The wastewater flows into the slide and enters the water film in the cavity through the water permeable holes 2011 on the lower surface of the slide.

[0072] S2. Open the sewage return valve; the sewage enters the cavity and mixes with the water film. The sewage mixes with the agent in the water film to neutralize the corrosiveness, and together with the water film, it reaches the drain outlet. It then passes through the water film outlet pipe 109 to the inside of the water film supply component. The sewage continuously flows in to form mixed sewage. The water level inside the water film supply component rises continuously until it reaches the alarm line. After reaching the alarm line, the component issues an alarm and simultaneously opens the sewage return pipe 109, the lift pump 205, and the sewage return pump. The sewage return pump sends the mixed sewage inside the water film supply component through the sewage return pipe 109 to the wastewater inlet pipe 101, and it flows back into the reaction tank to form a mixed sewage circulation. The high-concentration neutralizing agent in the water film supply component directly enters the reaction tank to react with the sewage.

[0073] S3. Open the sludge discharge pipe; at the same time as the lifting pump 205 starts, the sludge discharge pipe 104 starts to discharge the muddy sewage and sludge from the bottom of the reaction tank, leaving a buffer in the sedimentation tank. After leaving a buffer volume, close the sludge discharge pipe 104.

[0074] S4. Backwashing: After the overflow sewage has been mixed and circulated for a period of time, the water level inside the water film supply component drops to the normal water level, and after the sewage in this pool has been basically treated, the return water inlet pipe 108 is opened to let clean water into the component to circulate the mixed sewage, continuously diluting the mixed sewage and rinsing the component and cavity, and then carrying out subsequent maintenance.

[0075] Working principle

[0076] Water is supplied to the water film supply component to the specified scale, the water film outlet pipe 109 and the water film supply pipe 1011 are opened, the return water inlet pipe 108 is closed, the water film supply pump 1010 is started to supply water to the water ejector 203, the water ejector 203 is started to initially form a water film to fill the cavity, and air is discharged to avoid air bubbles from affecting the normal operation of the water film.

[0077] Adjust the water film; use the water jet 203 to control the water flow speed, and control the nozzle of the water jet 203 to be oriented to a suitable position. The water flows in a laminar state into the cavity formed by the first protrusion 201 of the semi-permeable membrane 2 and the second protrusion 301 on the inner surface of the reaction tank shell 3, and flows on the flow channel 202 to form a stable water film. As the water film moves downward, its speed increases under the action of gravity, and it may break away from the laminar flow state. The water flows in the flow channel, continuously washing the outer surface of the semi-permeable membrane 2 and the inner surface of the reaction tank shell 3. The water flows downward along the flow channel 202 under the action of gravity, and the flow rate is... As the flow gradually increases, the gap between the flow channel 202 and the second protrusion 301 gradually widens. The flow rate of water flowing through a single cross section increases, but the total water volume remains unchanged. The flow velocity of the water decreases to offset the increase in flow velocity caused by gravity, thus preventing the water from leaving the laminar flow state during the flow process. In the laminar flow state, the flow velocity of the water at the same cross section is the same, which can better flush the semi-permeable membrane 2 and the outer shell of the reaction tank 3, preventing it from leaving the laminar flow state, until it enters the bottom drain outlet and is discharged. At the same time, check whether the flow velocity of the water in the water film outlet pipe 109 reaches the specified range.

[0078] Based on the chemical properties of the wastewater, a suitable neutralizing agent is selected and added into the internal cavity of the stirring rod 1012 through the dosing port 1013. The stirring motor 1014 is started, and the neutralizing agent inside the stirring rod 1014 is gradually released into the water through the through hole 1017 under the action of centrifugal force. Wait for a period of time until the concentration of the neutralizing agent inside the water film supply component reaches the specified range.

[0079] Water intake and water treatment device start: Open wastewater inlet pipe 101, wastewater enters the reaction tank and comes into direct contact with semipermeable membrane 2. The cavity between semipermeable membrane 2 and the outer shell 3 of the reaction tank is covered with a water film containing a high concentration of neutralizing ions. Semipermeable membrane 2 only allows neutralizing ions to pass through and react with the wastewater. After neutralizing the wastewater, after a period of time, start lift pump 205 to lift the wastewater after reaction and add it directly to the chemical reagent machine 206 for sampling and testing. If it meets the standard, proceed to the next step; if it does not meet the standard, continue the reaction for a period of time.

[0080] If the wastewater is only corrosive, there is no need to add chemicals again. It can be directly sent to the sedimentation tank through the lifting pipeline. If it contains other impurities, the corresponding flocculant is added to the dosing machine 206 and stirred before being sent to the sedimentation tank through the lifting pipeline.

[0081] Once the water level in the sedimentation tank reaches the appropriate position, the aerator 107 is started. The aeration port releases a large number of bubbles into the water, impacting the water flow. At the same time, the lift pipe 8 continuously releases water flow towards the aerator. The water flow and bubbles mix near the aerator nozzle and spread outwards. Due to the restriction of the guide plate 6, most of the foam moves towards the bottom of the tank and continues to move towards the aerator following the water flow in the lift pipe. Some foam crosses the guide plate 6 and continues to spread outwards, and is eventually intercepted by the mud baffle 4 and enters the guide channel 7. The foam is broken by the impact of subsequent foam in the guide channel 7, and the sediment sinks. During the sinking process, it moves along the partition plate 5 to the sedimentation area. The upper clear liquid gradually overflows the overflow weir 106 and enters the outlet pipe for discharge.

Claims

1. A water treatment device, characterized in that: The device includes an outer shell, an aerator is installed at the top of the outer shell, the aeration port at the bottom of the aerator extends into the sedimentation tank, guide plates and baffles are arranged around the aeration port, a guide channel is arranged between the guide plates and the baffles, a partition plate is installed at the end of the guide plate near the ground, and an overflow weir is provided on the outer surface of the outer shell, and the overflow weir is connected to a water outlet pipe. It also includes a booster pump, which is connected to a booster pipe. A dosing machine is installed between the booster pump and the booster pipe. The booster pipe extends toward the sedimentation tank and passes through the outer shell to enter the sedimentation tank. A filter screen is installed at the outlet of the booster pipe that extends into the sedimentation tank. The device includes a water film reaction component, which includes a semi-permeable membrane. The outer surface of the semi-permeable membrane is provided with a first protrusion, and a flow channel is provided between the first protrusion. The device also includes a second protrusion, which is located on the inner surface of the outer shell of the reaction tank. The flow channel is fitted with the second protrusion. The bottom of the outer shell of the reaction tank is provided with a drain outlet. The semi-permeable membrane and the outer shell of the reaction tank are combined to form a cavity. It also includes a water jet injector, the nozzle of which extends into the cavity; a movable sealing component is provided at one end of the semi-permeable membrane near the water jet injector, the movable sealing component includes a sealing slider, a water storage tank is installed at one end of the sealing slider near the semi-permeable membrane, and a spring is installed at the other end, the spring connects the outer shell of the reaction tank and the sealing slider, the sealing slider is fitted with a sliding groove, and a water permeable hole is opened on the lower surface of the sliding groove; The wastewater inlet pipe is connected to the space formed by the inner surface of the semi-permeable membrane, thereby inputting the wastewater that needs to be treated; the booster pump is located inside the space formed by the inner surface of the semi-permeable membrane.

2. The water treatment device according to claim 1, characterized in that: It also includes a water film supply component, which includes a housing. The bottom of the housing is connected to a return water inlet pipe and a sewage return pipe. The outer surface of the housing is connected to a water film outlet pipe and a water film supply pipe. A stirring rod is installed inside the housing. The stirring rod has a cavity inside. A dosing port is connected to the top of the stirring rod. A bearing is installed at the connection between the stirring rod and the dosing port. A through hole is opened at the end of the stirring rod near the ground. A stirring motor is installed on the top of the housing.

3. The water treatment device according to claim 1, characterized in that: The water jets correspond one-to-one with the cavities. The semi-permeable membrane is movably connected to the outer shell of the reaction tank. A third protrusion is provided at the end of the semi-permeable membrane away from the ground. A through hole is opened in the center of the third protrusion. A fixing rod is fitted to the through hole. Rubber protective sleeves are installed at both ends of the fixing rod.

4. A water treatment device according to claim 3, characterized in that: It also includes a water film water supply pump, the inlet of which is connected to a water film water supply pipe, and the outlet of which is connected to a water film water inlet pipe. The water film water inlet pipe extends toward the water film protective device and passes through the outer shell to connect to the water film water supply pipe.

5. A water treatment device according to claim 4, characterized in that: The bottom of the outer shell is provided with a vent pipe, and a valve is provided at the connection between the vent pipe and the sedimentation tank. A sludge discharge pipe is provided at the bottom of the sedimentation tank.

6. A water treatment device according to claim 1, characterized in that: The dosing machine is equipped with a stirring rod inside, a sampling port at the top, and an active window at a corresponding position on the outer shell.

7. A water treatment method, employing the water treatment apparatus according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Prepare the water film; supply water to the water film supply component to the specified scale, open the water film outlet pipe and water film supply pipe, close the return water inlet pipe, start the water film supply pump to supply water to the ejector, and start the ejector to initially form a water film to fill the cavity. S2. Adjust the water film; The water flow rate is controlled by a water jet injector. The nozzle of the water jet injector is directed to a suitable position. The water flows in a laminar state into the cavity formed by the first protrusion of the semi-permeable membrane and the second protrusion on the inner surface of the reaction tank shell, and flows in the flow channel to form a stable water film. As the water film moves downward, its speed increases under the action of gravity, and it leaves the laminar flow state. At this time, the gap between the first protrusion and the flow channel gradually increases, the water flow rate increases, and the flow velocity decreases to avoid leaving the laminar flow state until it enters the bottom drain outlet and is discharged. At the same time, it is checked whether the water flow velocity in the water film outlet pipe reaches the specified range. S3. Add neutralizing agent; Based on the chemical properties of the wastewater, select a suitable neutralizing agent and add it into the cavity inside the stirring rod through the dosing port. Start the stirring motor, and the neutralizing agent inside the stirring rod will be gradually released into the water through the through hole under the action of centrifugal force. Wait for a period of time. S4. Water intake and start the water treatment device: Open the wastewater inlet pipe, and the sewage enters the reaction tank and comes into direct contact with the semi-permeable membrane. The cavity between the semi-permeable membrane and the outer shell of the reaction tank is covered with a water film containing a high concentration of neutralized ions. The semi-permeable membrane only allows neutralized ions to pass through and react with the wastewater. After a period of time, start the lift pump to lift the wastewater after the reaction and add it directly to the reagent machine for sampling and testing. If it meets the standard, proceed to the next step; if it does not meet the standard, continue the reaction for a period of time. S5. Add flocculant; If the wastewater is only corrosive, there is no need to add chemicals again. It can be directly sent to the sedimentation tank through the lifting pipe. If it contains other impurities, add the corresponding flocculant in the dosing machine and stir it. Then send it to the sedimentation tank through the lifting pipe. S6. Air flotation sedimentation; After the water level in the sedimentation tank reaches the corresponding position, the aerator is started. The aeration port releases a large number of air bubbles into the water to impact the water flow. At the same time, the lifting pipe continuously releases water flow towards the aerator. The water flow and air bubbles mix and spread around the aerator nozzle. Due to the restriction of the guide plate, most of the foam moves towards the bottom of the tank and continues to move towards the aerator with the water flow in the lifting pipe. Some foam crosses the guide plate and continues to spread around, and is eventually intercepted by the mud baffle and enters the guide channel. The foam is broken by the impact of subsequent foam in the guide channel, and the sediment sinks. During the sinking process, it moves along the partition plate to the sedimentation area. The upper clear liquid gradually overflows the overflow weir and enters the outlet pipe for discharge. S7. Sludge Discharge Maintenance: After the unit has been operating for a period of time, sludge discharge maintenance is required. During sludge discharge, open the sludge discharge pipe to discharge the sludge settled at the bottom of the sedimentation tank along with the sludge-containing wastewater. After discharge, perform sludge dewatering treatment. When the sludge is basically discharged, close the sludge discharge pipe and the aerator, and open the vent pipe to discharge the wastewater in the sedimentation tank to other wastewater treatment devices. At the same time, the lift pump lifts the wastewater in the reaction tank to the sedimentation tank for discharge. At this time, the water membrane protection device continues to operate until the wastewater in the reaction tank is basically discharged. The return water is fed into the reaction tank through the wastewater inlet pipe for rinsing, and then lifted to the sedimentation tank for discharge by the lift pump. Repeat the rinsing until the wastewater residue in the reaction tank is within the standard range. Close the wastewater inlet pipe and the lift pump, and finally close the water membrane protection device, drain the water flow in the cavity, and close the water membrane outlet pipe and water membrane supply pipe. Inspect the semi-permeable membrane and perform maintenance.

8. A method of using a water film protection device in the event of an overflow accident, employing the water treatment device according to any one of claims 1-6, characterized in that, Includes the following steps; S1. Activate the movable sealing component; When wastewater exceeding the buffer volume enters the reaction tank, the water level in the reaction tank gradually rises. When the water level rises to the point of overflowing the water storage hopper and entering, the water volume in the water storage hopper gradually increases. Under the action of gravity, the water flow and the water storage hopper cause the sealing slider to move along the slide groove towards the outer shell of the reaction tank. The wastewater flows into the slide groove and enters the water film in the cavity through the water permeable holes on the lower surface of the slide groove. S2. Open the sewage return valve; the sewage enters the cavity and mixes with the water film. The sewage mixes with the chemicals in the water film to neutralize the corrosiveness, and then reaches the drain outlet together with the water film. It then passes through the water film outlet pipe to the inside of the water film supply component. The sewage continuously flows in to form mixed sewage, and the water level inside the water film supply component rises continuously until it reaches the alarm line. After reaching the alarm line, the component issues an alarm and simultaneously opens the sewage return pipe, the lift pump, and the sewage return pump. The sewage return pump sends the mixed sewage inside the water film supply component to the wastewater inlet pipe through the sewage return pipe, and flows back into the reaction tank to form a mixed sewage circulation. The high-concentration neutralizing agent in the water film supply component directly enters the reaction tank to react with the sewage. S3. Open the sludge discharge pipe; At the same time as the booster pump starts, the sludge discharge pipe starts to discharge the muddy sewage and sludge from the bottom of the reaction tank, leaving a buffer in the sedimentation tank. After leaving a buffer volume, close the sludge discharge pipe. S4. Backwashing: After the overflow sewage has been mixed and circulated for a period of time, the water level inside the water film supply component drops to the normal water level, and after the sewage in this pool has been basically treated, the return water inlet pipe is opened to let clean water into the component to circulate the mixed sewage, continuously diluting the mixed sewage and rinsing the component and cavity, and then carrying out subsequent maintenance.

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