Novel high-efficiency static micro-filter for water vapor backwashing

Abstract

A left partition bin, a middle partition bin and a right partition bin are sequentially connected and are matched with a common cover plate and a control box, the left partition bin is an open cuboid, a side plate is provided with a main water inlet used for introducing sewage, a filter bin is composed of a plurality of microfiltration units connected in parallel, and the right partition bin is also an open cuboid and is provided with a water inlet used for introducing sewage. The upper part and the lower part are respectively provided with water outlets with different functions; the work comprises normal filtration and backwashing, during normal filtration, related valves are kept normally open, sewage flows in from a main water inlet and flows out from a main water outlet after being filtered by a filter screen, and when the filter screen intercepts dirt, the water level rises, backwashing is triggered, the related valves are firstly closed, water in a lower chamber of a right partition bin is pumped out, and then a backwashing assembly is started; the filter screen is flushed through high-pressure steam, the rodless cylinder drives comprehensive cleaning, and after the sewage discharging assembly discharges sewage, equipment is closed, related valves are opened, and normal filtering is recovered. The device is simple in structure, low in cost, free of blockage and easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of microfiltration technology, and more specifically to a novel high-efficiency static microfiltration machine with water-air backwashing. Background Technology

[0002] Microfiltration machines, as a filtration and recovery, solid-liquid separation device, are mainly used for wastewater filtration treatment. Common applications include the first-stage filtration of raw water to remove large particulate solid impurities, suspended algae, etc., as well as the first-stage coarse filtration stage of closed-loop purification.

[0003] Existing common rotary drum microfiltration machines consist of an inlet tank, a precision filter, a rotating disc, a motor drive, and a backwash pump. Their filtration principle involves fixing a microporous filter screen to a rotating drum. Aquaculture water flows into the drum, and as the drum rotates, solid waste is trapped by the filter screen, while water passes through the screen and enters the outside of the drum, achieving solid-liquid separation. When impurities accumulate to a certain level, the rotating drum, combined with the backwash water force, cleans the filter screen. However, this type of microfiltration machine has several problems: First, since the filter screen is fixed to the drum, only the filter screen in the lower part of the drum participates in filtration, while the upper filter screen is not utilized. Furthermore, during backwashing, the unfiltered filter screen is also washed away, wasting energy and water. Second, transmission components such as belts, chains, and gears are prone to wear, elongation, or breakage due to frequent operation and friction. Third, seals are easily worn due to material corrosion and aging, leading to seal failure. Fourth, production requires high processing precision and assembly processes; for example, the cylindricity and concentricity of the drum need strict control, increasing manufacturing costs.

[0004] Existing Chinese invention patent CN118949550A discloses a static microfilter, which consists of a water filtration unit, a water collection unit, and a backwashing device. The water filtration unit includes a water filter tank, a water filter plate, and a guide plate. The water collection unit includes a sludge collection tank and a clean water tank. The backwashing device includes components such as nozzles, nozzle holders, and slide bars. This microfilter improves the backwashing effect to some extent through a specific design; however, because filtration and backwashing occur simultaneously, the high-pressure backwashing water must pass through a section of water before reaching the water filter plate, resulting in a significant reduction in impact force and difficulty in removing stubborn dirt. Moreover, some of the flushed dirt is prone to flow back with the water flow, clogging the water filter plate again. Overall, the backwashing effect is poor, and the microfilter is still prone to clogging. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a novel high-efficiency static microfiltration machine with large filtration capacity, low clogging, simple equipment, convenient filter replacement, and high cost-effectiveness, featuring water and air backwashing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel high-efficiency static microfilter with water and air backwashing. The overall structure of the microfilter consists of a left compartment, a filter compartment, a right compartment, a common cover plate, and an automatic control box, wherein the left compartment, the filter compartment, and the right compartment are fixedly connected in sequence.

[0007] The left compartment is a rectangular open box formed by the front side plate I, the left side plate I, the rear side plate I, and the bottom plate I. The main water inlet is located in the middle of the left side plate I.

[0008] The filter chamber is composed of multiple microfiltration units connected in parallel. Each microfiltration unit consists of a housing, a backwashing component, a sewage discharge component, a water pumping component, and a filter screen component. Adjacent microfiltration units are provided with a common partition. The height and width of the filter chamber are the same as the height and width of the left partition.

[0009] The right compartment is a rectangular open box formed by the front side plate III, the rear side plate III, the right side plate III, and the bottom plate III, with the same height and width as the filter compartment. A horizontal partition is provided at the middle height of the right compartment. A main water outlet and a backwash water inlet are provided at the upper part of the right side plate III, which is higher than the horizontal partition. A main water inlet is provided at the lower part of the right side plate III, which is close to the bottom plate III.

[0010] An observation window is provided in the middle of the upper surface of the common cover plate, and a plastic sealing strip is provided on the lower surface. The plastic sealing strip forms a seal with the upper opening of the microfilter.

[0011] The automatic control box includes a control box, a microcontroller or PLC and its control circuit, an upper water level sensor, and a lower water level sensor. The upper water level sensor and the lower water level sensor are installed on the right rear support baffle of the box. The upper water level sensor is located at the height of the upper edge of the filter screen of the filter assembly, and the lower water level sensor is located at the height of the lower edge of the filter screen of the filter assembly.

[0012] The microfiltration unit consists of a housing, a backwashing assembly, a sewage discharge assembly, a water pumping assembly, and a filter assembly.

[0013] The frame structure of the box consists of a front side panel II, a left side panel II, a rear side panel II, a right side panel II, and a bottom panel II, which are fixedly connected to form a rectangular open box.

[0014] The internal structure of the housing is as follows: The housing is equipped with supporting baffles. The left supporting baffle is parallel to the left side panel II, positioned to the right of the left side panel II and between the two filter assemblies, with its lower part fixedly connected to the bottom panel II. The left supporting plate is horizontally positioned, with its left side fixedly connected to the upper part of the left side panel II and its right side fixedly connected to the upper part of the left supporting baffle. The right front supporting baffle is parallel to the right side panel II, perpendicularly fixedly connected to the front side panel II, and its lower part fixedly connected to the bottom panel II. The right rear supporting baffle is parallel to the right side panel II, perpendicularly fixedly connected to the rear side panel II, and its lower part fixedly connected to the bottom panel II. The right supporting plate is horizontally positioned, with its left side fixedly connected to the upper parts of the right front supporting baffle and the right rear supporting baffle, and its right side fixedly connected to the upper part of the right side panel II.

[0015] The openings and components on the side panels of the housing include: a water inlet and a drain outlet on the left side panel II, with a water inlet valve installed on the water inlet; an upper water outlet in the upper middle part of the right side panel II, which is higher than the horizontal level of the right compartment's horizontal partition; and a lower water outlet in the lower middle part of the right side panel II, which is lower than the horizontal level of the right compartment's horizontal partition; a gate valve is installed to the left of the upper and lower water outlets, which has two working states: in the normally open filtration state, the upper water outlet is unobstructed, and filtered water can pass through, while the lower water outlet is blocked by the gate valve's gate plate, preventing filtered water from passing through; in the backwash state, the gate valve's gate plate moves upward, the upper water outlet is blocked by the gate valve's gate plate, preventing filtered water from passing through, while the lower water outlet is unobstructed, and filtered water can pass through.

[0016] The backwash assembly consists of a backwash water path, a backwash air path, a rodless cylinder, and its accessories.

[0017] The backwash water system consists of the following components, and their specific connections and operation methods are as follows.

[0018] Components: Composed of backwash water pipe, water nozzle array, connecting water pipe, backwash water valve, connecting water pipe, backwash water pump, backwash water pump bracket and backwash water inlet pipe.

[0019] Operating procedure: The backwash water pump is connected to the backwash inlet through the backwash inlet pipe to obtain water. The generated high-pressure water is transmitted to the backwash water pipe through the connecting water pipe, the backwash water valve, and the connecting water pipe, and finally sprayed out through the water nozzle array.

[0020] Layout features: The backwash water pipe is set vertically, and the water nozzle array is tilted and evenly distributed on both sides of the backwash water pipe.

[0021] The backflushing air circuit consists of the following components, and its connection and operating principle are as follows.

[0022] Components: Consists of a backwash air pipe, an air nozzle array, a connecting air pipe, a backwash air valve, a connecting air pipe, and a backwash air pump.

[0023] Operating procedure: The high-pressure air generated by the backwash air pump is transmitted to the backwash air pipe through the connecting air pipe, backwash air valve, and connecting air pipe, and finally sprayed out through the air nozzle array.

[0024] Layout features: The backwash air pipe is set vertically, and the air nozzle array is tilted and evenly distributed on the front and rear sides of the backwash air pipe.

[0025] The rodless cylinder and its accessories are horizontally arranged, with its left side fixedly connected to the left support plate and its right side fixedly connected to the right support plate. The upper part of the backwash water pipe and the backwash air pipe are fixedly connected to the slider of the rodless cylinder and its accessories, and can move back and forth with the slider to drive the backwash water and air to clean the entire filter screen.

[0026] The sewage discharge assembly consists of a sewage pipe, a sewage pump, a sewage valve, and a sewage pump bracket. The sewage pump is fixedly connected to the outer wall of the housing via the sewage pump bracket, and the sewage pump is connected to the sewage outlet via the sewage pipe and the sewage valve.

[0027] The pumping assembly consists of a pumping pipe, a pumping pump, and a pumping pump bracket. The pumping pump is fixedly connected to the right side plate III of the right compartment via the pumping pump bracket, and the pumping pump is connected to the main pumping port via the pumping pipe.

[0028] The filter assembly consists of a left slide groove, a right slide groove, a support frame, a filter screen, a pressure strip frame, clamping screws, and fixing screws. Regarding the installation layout: two left slide grooves are vertically fixed to both sides of the left support baffle, and two symmetrical right slide grooves are fixed to the left side walls of the right front support baffle and right rear support baffle, respectively. The filter screen is fixed by clamping screws firmly pressing it between the support frame and the pressure strip frame. The assembly slides and is fixed by sliding the two sides of the support frame up and down along the left and right slide grooves, with fixing screws provided on one side of each slide groove.

[0029] The beneficial effects of this utility model are as follows: This utility model provides a novel high-efficiency static microfiltration machine with water and air backwashing. The equipment has a simple structure, which reduces manufacturing costs. The filter screen has a high utilization rate, a large filtration capacity, and is not easily clogged. The filter screen components are simple, easy to replace, and easy to maintain. It can also be combined into a microfiltration machine with dual or multiple microfiltration units, which further highlights its beneficial effects. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model.

[0031] Figure 2 This is a partial structural schematic diagram of the present invention.

[0032] Figure 3 This is a partial top view of the structure of this utility model.

[0033] Figure 4 This is a schematic diagram of the left compartment structure of this utility model.

[0034] Figure 5 This is a schematic diagram of the right compartment structure of this utility model.

[0035] Figure 6 This is a partial structural diagram of the filter chamber and filter screen assembly of this utility model.

[0036] Figure 7 This is a schematic diagram of the structure of the housing and filter assembly of this utility model.

[0037] Figure 8 This is a schematic diagram of the box body structure of this utility model.

[0038] Figure 9 This is a schematic diagram of the filter assembly structure of this utility model.

[0039] The diagram is labeled as follows: 100, Left Compartment; 101, Front Side Panel I; 102, Left Side Panel I; 103, Rear Side Panel I; 104, Bottom Plate I; 105, Main Inlet; 200, Filter Compartment; 210, Microfiltration Unit; 211, Housing; 21101, Front Side Panel II; 21102, Left Side Panel II; 21103, Rear Side Panel II; 21104, Right Side Panel II; 21105, Bottom Plate II; 21106, Sub-inlet; 21107, Sub-inlet Valve; 21108, Drain; 21109, Upper Sub-outlet; 21110, Lower Sub-outlet; 21111, Sub-gate Valve; 211 12. Left support baffle; 21113. Left support plate; 21114. Right front support baffle; 21115. Right rear support baffle; 21116. Right support plate; 212. Backwash assembly; 2121. Backwash water path; 21211. Backwash water pipe; 21212. Water nozzle array; 21213. Connecting water pipe; 21214. Backwash water valve; 21215. Connecting water pipe; 21216. Backwash water pump; 21217. Backwash water pump bracket; 21218. Backwash inlet pipe; 2122. Backwash air path; 21221. Backwash air pipe; 21222. Air nozzle array Items listed below: 21223, Connecting air pipe; 21224, Backwash air valve; 21225, Connecting air pipe; 21226, Backwash air pump; 2123, Rodless cylinder and its accessories; 213, Sewage discharge assembly; 21301, Sewage discharge pipe; 21302, Sewage discharge pump; 21303, Sewage discharge pump bracket; 21304, Sewage discharge valve; 214, Water pumping assembly; 21401, Water pumping pipe I; 21402, Water pump; 21403, Water pump bracket; 215, Filter screen assembly; 21501, Left slide rail; 21502, Right slide rail; 21503, Bracket frame; 21504, Filter screen; 21505. Pressure strip frame, 21506, clamping screw, 21507, fixing locking screw, 216, common partition; 300, right compartment, 301, front side panel III, 302, rear side panel III, 303, right side panel III, 304, bottom panel III, 305, horizontal partition, 306, main outlet, 307, backwash inlet, 308, main drain; 400, common cover plate, 401, observation window, 402, plastic sealing strip; 500, automatic control box, 501, control box, 502, microcontroller or PLC and its control circuit, 503, upper water level sensor, 504, lower water level sensor. Detailed Implementation

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0041] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0042] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0043] Example 1: As Figures 1-9 As shown, a novel high-efficiency static microfiltration machine with water and air backwashing is composed of a left compartment 100, a filter compartment 200, a right compartment 300, a common cover plate 400, and an automatic control box 500. The left compartment 100, the filter compartment 200, and the right compartment 300 are fixedly connected in sequence.

[0044] The left compartment 100 is a rectangular open box formed by the front side plate I101, the left side plate I102, the rear side plate I103 and the bottom plate I104. The main water inlet 105 is located in the middle of the left side plate I102.

[0045] The filter chamber 200 is composed of multiple microfiltration units 210 connected in parallel. Each microfiltration unit 210 consists of a housing 211, a backwashing component 212, a sewage discharge component 213, a water pumping component 214, and a filter screen component 215. A common partition 216 is provided between adjacent microfiltration units 210. The height and width of the filter chamber 200 are the same as the height and width of the left partition 100.

[0046] The right compartment 300 is a rectangular open box formed by the front side plate III301, the rear side plate III302, the right side plate III303, and the bottom plate III304. Its height and width are the same as those of the filter compartment 200. A horizontal partition 305 is provided at the middle height of the right compartment 300. A main outlet 306 and a backwash inlet 307 are provided at the upper part of the right side plate III303, which is higher than the horizontal partition 305. A main drain 308 is provided at the lower part of the right side plate III303, which is close to the bottom plate III304.

[0047] The common cover plate 400 has an observation window 401 in the middle of its upper surface and a plastic sealing strip 402 on its lower surface. The plastic sealing strip 402 forms a seal with the upper opening of the microfilter.

[0048] The automatic control box 500 includes a control box 501, a microcontroller or PLC and its control circuit 502, an upper water level sensor 503, and a lower water level sensor 504. The upper water level sensor 503 and the lower water level sensor 504 are mounted on the right rear support baffle 21115 of the box body 211. The upper water level sensor 503 is located at the upper edge height of the filter screen 21504 of the filter screen assembly 215, and the lower water level sensor 504 is located at the lower edge height of the filter screen 21504 of the filter screen assembly 215.

[0049] The microfiltration unit 210 consists of a housing 211, a backwashing assembly 212, a sewage discharge assembly 213, a water pumping assembly 214, and a filter assembly 215.

[0050] The frame structure of the box 211 is formed by the front side plate II21101, the left side plate II21102, the rear side plate II21103, the right side plate II21104, and the bottom plate II21105, which are fixedly connected to form a rectangular open box.

[0051] The internal structure of the housing 211 is as follows: The housing 211 has internal support baffles, wherein the left support baffle 21112 is parallel to the left side plate II 21102, located to the right of the left side plate II 21102 and between the two filter assemblies 215, and its lower part is fixedly connected to the bottom plate II 21105; the left support plate 21113 is horizontally arranged, its left side is fixedly connected to the upper part of the left side plate II 21102, and its right side is fixedly connected to the upper part of the left support baffle 21112; the right front support baffle 21114 is connected to the right side plate I... I21104 is parallel to and vertically fixedly connected to the front side plate II21101, and its lower part is fixedly connected to the bottom plate II21105; the right rear support baffle 21115 is parallel to the right side plate II21104, vertically fixedly connected to the rear side plate II21103, and its lower part is fixedly connected to the bottom plate II21105; the right support plate 21116 is horizontally set, its left side is fixedly connected to the upper part of the right front support baffle 21114 and the right rear support baffle 21115, and its right side is fixedly connected to the upper part of the right side plate II21104.

[0052] The openings and components on the side panels of the housing 211 include: a water inlet 21106 and a drain outlet 21108 on the left side panel II 21102, with a water inlet valve 21107 installed on the water inlet 21106; an upper water outlet 21109 on the upper middle part of the right side panel II 21104, which is higher than the horizontal height of the horizontal partition 305 of the right compartment 300; and a lower water outlet 21110 on the lower middle part of the right side panel II 21104, which is lower than the horizontal position of the horizontal partition 305 of the right compartment 300; the upper water outlet 21109 and the lower water outlet... A slide gate valve 21111 is installed on the left side of outlet 21110. This slide gate valve 21111 has two working states. In the normally open filtration state, the upper outlet 21109 is unobstructed, and the filtered water can pass through. The lower outlet 21110 is blocked by the slide gate of the slide gate valve 21111, preventing the filtered water from passing through. In the backwashing state, the slide gate of the slide gate valve 21111 moves upward. The upper outlet 21109 is blocked by the slide gate of the slide gate valve 21111, preventing the filtered water from passing through. The lower outlet 21110 is unobstructed, and the filtered water can pass through.

[0053] The backwash assembly 212 consists of a backwash water passage 2121, a backwash air passage 2122, and a rodless cylinder and its accessories 2123.

[0054] The backwash water circuit 2121 is composed of the following components, and the specific connection and operation are as follows.

[0055] Components: Composed of a backwash water pipe 21211, a water nozzle array 21212, a connecting water pipe 21213, a backwash water valve 21214, a connecting water pipe 21215, a backwash water pump 21216, a backwash water pump bracket 21217, and a backwash water inlet pipe 21218.

[0056] Operating procedure: The backwash water pump 21216 is connected to the backwash water inlet 307 through the backwash water inlet pipe 21218 to obtain water. The generated high-pressure water is transmitted to the backwash water pipe 21211 through the connecting water pipe 21215, the backwash water valve 21214, and the connecting water pipe 21213, and finally sprayed out through the water nozzle array 21212.

[0057] Layout features: The backwash water pipe 21211 is set vertically, and the water nozzle array 21212 is inclined and evenly distributed on the front and rear sides of the backwash water pipe 21211.

[0058] The backwash air path 2122 consists of the following components, and its connection and operating principle are as follows.

[0059] Components: Composed of backwash air pipe 21221, air nozzle array 21222, connecting air pipe 21223, backwash air valve 21224, connecting air pipe 21225, and backwash air pump 21226.

[0060] Operating procedure: The high-pressure air generated by the backwash air pump 21226 is transmitted to the backwash air pipe 21221 via the connecting air pipe 21225, the backwash air valve 21224, and the connecting air pipe 21223, and finally sprayed out through the air nozzle array 21222.

[0061] Layout features: The backwash air pipe 21221 is set vertically, and the air nozzle array 21222 is inclined and evenly distributed on the front and rear sides of the backwash air pipe 21221.

[0062] The rodless cylinder and its accessories 2123 are horizontally arranged, with its left side fixedly connected to the left support plate 21113 and its right side fixedly connected to the right support plate 21116. The upper parts of the backwash water pipe 21211 and the backwash air pipe 21221 are fixedly connected to the slider of the rodless cylinder and its accessories 2123, and can move back and forth with the slider to drive the backwash water and air to clean the entire filter screen 21504.

[0063] The sewage discharge assembly 213 consists of a sewage discharge pipe 21301, a sewage discharge pump 21302, a sewage discharge valve 21304, and a sewage discharge pump bracket 21303. The sewage discharge pump 21302 is fixedly connected to the outer wall of the housing 211 through the sewage discharge pump bracket 21303. The sewage discharge pump 21302 is connected to the sewage discharge port 21108 through the sewage discharge pipe 21301 and the sewage discharge valve 21304.

[0064] The pumping assembly 214 consists of a pumping pipe 21401, a pumping pump 21402, and a pumping pump bracket 21403. The pumping pump 21402 is fixedly connected to the right side plate III303 of the right compartment 300 via the pumping pump bracket 21403. The pumping pump 21402 is connected to the main pumping port 308 via the pumping pipe 21401.

[0065] The filter assembly 215 consists of a left slide groove 21501, a right slide groove 21502, a support frame 21503, a filter screen 21504, a pressure strip frame 21505, a clamping screw 21506, and a fixing locking screw 21507.

[0066] Regarding the installation layout: two left sliding grooves 21501 are vertically fixed on both sides of the left support baffle 21112, and two right sliding grooves 21502, which are symmetrical to them, are fixed on the left side walls of the right front support baffle 21114 and the right rear support baffle 21115, respectively.

[0067] Filter screen fixing method: The filter screen 21504 is firmly pressed and fixed between the bracket frame 21503 and the pressure strip frame 21505 by the clamping screw 21506.

[0068] Component sliding and fixing method: The two sides of the bracket frame 21503 can slide up and down along the left slide groove 21501 and the right slide groove 21502, and a fixing locking screw 21507 is provided on one side of the left slide groove 21501 and the right slide groove 21502.

[0069] The working process of the novel high-efficiency static microfilter with water-air backwashing provided in this embodiment in normal filtration and backwashing states.

[0070] 1) The normal filtering state is as follows.

[0071] During filtration, the valve and pump status is as follows: the inlet valve 21107 of each microfiltration unit 210 is normally open, the backwash water valve 21214, the backwash air valve 21224, and the drain valve 21304 are normally closed, the gate valve 21111 is at the bottom blocking the lower outlet 21110, and the backwash water pump 21216, the backwash air pump 21226, the drain pump 21302, and the water pump 21402 are in the off state.

[0072] Water flow path: Aquaculture wastewater first flows into the left compartment 100 through the main inlet 105. Then, the water flows through the branch inlet valves 21107 and enters each microfiltration unit 210. Inside the microfiltration unit 210, the water is split into two streams after encountering the left support baffle 21112. These two streams flow to the two filter screens 21504 respectively. The water filtered by the filter screens 21504 converges in the channel between the two filter screens 21504. Then, the converged water flows into the upper part of the right compartment 300 through the upper branch outlet 21109 on the right side plate II 21104. Finally, the water flows out of the microfilter through the main outlet 306.

[0073] 2) The backwashing status is as follows.

[0074] Triggering backwashing conditions: During the operation of the microfilter, as the aquaculture wastewater is filtered, the dirt is intercepted on the outside of the filter screen 21504. As the dirt accumulates, when the amount of dirt intercepted by the filter screen 21504 reaches a certain level and forms a blockage, the water level on the outside of the filter screen 21504 rises to the set position of the upper water level sensor 503. The microcontroller or PLC and its control circuit 502 detect the signal from the upper water level sensor 503 in a certain microfiltration unit 210 that the set water level has been reached, and at this time, backwashing of the microfiltration unit begins.

[0075] Prepare for backwashing: First, close the inlet valve 21107. Move the slide plate of the slide valve 21111 upward to block the upper outlet 21109, while exposing the lower outlet 21110, allowing the filtered water to flow into the lower part of the right compartment 300. Turn on the water pump 21402 to pump the water flowing into the lower part of the right compartment 300 out of the microfilter and to the downstream treatment unit.

[0076] Water washing stage: When the water level in the microfiltration unit 210 drops to the water level set by the lower water level sensor 504, the backwash water valve 21214 is opened and the backwash water pump 21216 is started. The high-pressure water generated by the backwash water pump 21216 is transmitted sequentially through the connecting water pipe 21215, the backwash water valve 21214, and the connecting water pipe 21213 to the backwash water pipe 21211. Finally, it is sprayed out through the water nozzle array 21212 to wash the filter screen 21504. At the same time, the rodless cylinder and its accessories 2123 are started. The backwash water pipe 21211 moves back and forth with the slider of the rodless cylinder and its accessories 2123 to clean the entire filter screen 21504. After 10-30 seconds, the backwash water valve 21214, the backwash water pump 21216, and the rodless cylinder and its accessories 2123 are turned off.

[0077] Wastewater discharge stage: After the water washing is completed, the following operations are performed simultaneously: open the wastewater discharge valve 21304, start the wastewater discharge pump 21302, and the wastewater discharge pump 21302 will pump all the backwash wastewater out of the microfilter through the wastewater discharge port 21108.

[0078] Air washing stage: While discharging sewage, open the backwash air valve 21224 and start the backwash air pump 21226. The high-pressure air generated by the backwash air pump 21226 is transmitted sequentially through the connecting air pipe 21225, the backwash air valve 21224, and the connecting air pipe 21223 to the backwash air pipe 21221. Finally, it is sprayed out through the air nozzle array 21222 to air wash the filter screen 21504. At the same time, the rodless cylinder and its accessories 2123 are started. The backwash air pipe 21221 moves back and forth with the slider of the rodless cylinder and its accessories 2123 to clean the entire filter screen 21504. After 10-30 seconds, the backwash air valve 21224, the backwash air pump 21226, and the rodless cylinder and its accessories 2123 are turned off.

[0079] Resume normal filtration: After air washing is completed, turn off the water pump 21402, the sewage pump 21302, and the sewage valve 21304. At this time, the backwashing of the microfiltration unit is completed. Open the inlet valve 21107 of the microfiltration unit. The slide plate of the slide plate valve 21111 moves downward to block the lower outlet 21110, while exposing the upper outlet 21109. The microfiltration unit 210 enters the normal filtration state.

[0080] Complete the overall backwash: Perform the above backwashing operation on other microfiltration units 210 in sequence until all microfiltration units 210 have been backwashed once, thus completing one complete backwash of the microfiltration machine.

[0081] The above description is only a specific embodiment of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A novel high-efficiency static microfiltration machine with water-air backwashing, characterized in that, The overall structure of the microfiltration unit consists of a left compartment (100), a filter compartment (200), a right compartment (300), a common cover plate (400), and an automatic control box (500). The left compartment (100), the filter compartment (200), and the right compartment (300) are fixedly connected in sequence, and the structure of each part is as follows: 1) The left compartment (100) is characterized in that it is a rectangular open box formed by a front side plate I (101), a left side plate I (102), a rear side plate I (103) and a bottom plate I (104), and a main water inlet (105) is provided in the middle of the left side plate I (102). 2) The filter chamber (200) is characterized in that it is composed of multiple microfiltration units (210) connected in parallel. Each microfiltration unit (210) is composed of a housing (211), a backwashing assembly (212), a sewage discharge assembly (213), a water pumping assembly (214), and a filter screen assembly (215). A common partition (216) is provided between adjacent microfiltration units (210). The height and width of the filter chamber (200) are the same as the height and width of the left partition (100). 3) The right compartment (300) is characterized in that the right compartment (300) is a rectangular box-shaped structure formed by the front side plate III (301), the rear side plate III (302), the right side plate III (303), and the bottom plate III (304), and its height and width are the same as those of the filter compartment (200); a horizontal partition (305) is provided at the middle height position of the right compartment (300), and a main outlet (306) and a backwash inlet (307) are provided at the upper part of the right side plate III (303) at a height position higher than the horizontal partition (305); a main drain (308) is provided at the lower part of the right side plate III (303) at a height position close to the bottom plate III (304). 4) The common cover plate (400) is characterized in that an observation window (401) is provided in the middle of the upper surface of the common cover plate (400), and a plastic sealing strip (402) is provided on the lower surface, wherein the plastic sealing strip (402) forms a seal with the upper opening of the microfilter. 5) The automatic control box (500) is characterized in that it includes a control box (501), a microcontroller or PLC and its control circuit (502), an upper water level sensor (503), and a lower water level sensor (504); the upper water level sensor (503) and the lower water level sensor (504) are disposed on the right rear support baffle (21115) of the box body (211), the upper water level sensor (503) is located at the upper edge height of the filter screen (21504) of the filter screen assembly (215), and the lower water level sensor (504) is located at the lower edge height of the filter screen (21504) of the filter screen assembly (215).

2. The novel high-efficiency static microfiltration machine with water-air backwashing according to claim 1, characterized in that: The microfiltration unit (210) consists of a housing (211), a backwashing assembly (212), a sewage discharge assembly (213), a water pumping assembly (214), and a filter assembly (215), and the structure of each part is as follows; 1) The frame structure of the box (211): It is formed by the front side plate II (21101), the left side plate II (21102), the rear side plate II (21103), the right side plate II (21104) and the bottom plate II (21105) being fixedly connected to form a rectangular open box; 2) Internal structure of the housing (211): The housing (211) is provided with a support baffle, wherein the left support baffle (21112) is parallel to the left side plate II (21102), is located to the right of the left side plate II (21102) and between the two filter assemblies (215), and its lower part is fixedly connected to the bottom plate II (21105); the left support plate (21113) is horizontally set, its left side is fixedly connected to the upper part of the left side plate II (21102), and its right side is fixedly connected to the upper part of the left support baffle (21112); the right front support baffle (21114) is connected to the right side Plate II (21104) is parallel to and vertically fixed to the front plate II (21101), and its lower part is fixedly fixed to the bottom plate II (21105); the right rear support baffle (21115) is parallel to the right side plate II (21104), vertically fixed to the rear side plate II (21103), and its lower part is fixedly fixed to the bottom plate II (21105); the right support plate (21116) is horizontally set, its left side is fixedly fixed to the upper part of the right front support baffle (21114) and the right rear support baffle (21115), and its right side is fixedly fixed to the upper part of the right side plate II (21104); 3) Openings and components on the side panel of the housing (211): including a water inlet (21106) and a drain outlet (21108) on the left side panel II (21102), with a water inlet valve (21107) installed on the water inlet (21106); an upper water outlet (21109) is opened in the upper middle part of the right side panel II (21104), which is higher than the horizontal height of the horizontal partition (305) of the right compartment (300); a lower water outlet (21110) is opened in the lower middle part of the right side panel II (21104), which is lower than the horizontal position of the horizontal partition (305) of the right compartment (300); and an upper water outlet (21109) is opened in the lower middle part of the right side panel II (21104). A slide gate valve (21111) is installed on the left side of the upper outlet (21109) and the lower outlet (21110). The slide gate valve (21111) has two working states. In the normally open filtration state, the upper outlet (21109) is unobstructed, and the filtered water can pass through. The lower outlet (21110) is blocked by the slide gate of the slide gate valve (21111), preventing the filtered water from passing through. In the backwashing state, the slide gate of the slide gate valve (21111) moves upward. The upper outlet (21109) is blocked by the slide gate of the slide gate valve (21111), preventing the filtered water from passing through. The lower outlet (21110) is unobstructed, and the filtered water can pass through. 4) The backwash assembly (212) consists of a backwash water passage (2121), a backwash air passage (2122), and a rodless cylinder and its accessories (2123); 5) The backwash water path (2121) consists of a backwash water pipe (21211), a water nozzle array (21212), a connecting water pipe (21213), a backwash water valve (21214), a connecting water pipe (21215), a backwash water pump (21216), a backwash water pump bracket (21217), and a backwash water inlet pipe (21218); wherein, the backwash water pipe (21211) is vertically arranged, and the water nozzle array (21212) is inclined and evenly distributed on the front and rear sides of the backwash water pipe (21211); the backwash water pump (21216) is connected to the backwash water inlet (307) through the backwash water inlet pipe (21218), and is connected to the backwash water pipe (21211) through the connecting water pipe (21215), the backwash water valve (21214), and the connecting water pipe (21213); 6) The backwash air path (2122) consists of a backwash air pipe (21221), an air nozzle array (21222), a connecting air pipe (21223), a backwash air valve (21224), a connecting air pipe (21225), and a backwash air pump (21226); wherein, the backwash air pipe (21221) is vertically arranged, and the air nozzle array (21222) is inclined and evenly distributed on the front and rear sides of the backwash air pipe (21221); the backwash air pump (21226) is connected to the backwash air pipe (21221) through the connecting air pipe (21225), the backwash air valve (21224), and the connecting air pipe (21223); 7) The rodless cylinder and its accessories (2123) are horizontally arranged, with its left side fixedly connected to the left support plate (21113) and its right side fixedly connected to the right support plate (21116); the upper part of the backwash water pipe (21211) and the backwash air pipe (21221) are fixedly connected to the slider of the rodless cylinder and its accessories (2123), and can move back and forth with the slider to drive the backwash water and air to clean the entire filter screen (21504); 8) The sewage discharge assembly (213) consists of a sewage pipe (21301), a sewage pump (21302), a sewage valve (21304), and a sewage pump bracket (21303). The sewage pump (21302) is fixedly connected to the outer wall of the housing (211) through the sewage pump bracket (21303). The sewage pump (21302) is connected to the sewage outlet (21108) through the sewage pipe (21301) and the sewage valve (21304). 9) The pumping assembly (214) consists of a pumping pipe (21401), a pumping pump (21402) and a pumping pump bracket (21403). The pumping pump (21402) is fixedly connected to the right side plate III (303) of the right compartment (300) through the pumping pump bracket (21403). The pumping pump (21402) is connected to the main pumping port (308) through the pumping pipe (21401). 10) The filter assembly (215) consists of a left slide groove (21501), a right slide groove (21502), a support frame (21503), a filter screen (21504), a pressure strip frame (21505), a clamping screw (21506), and a fixing locking screw (21507); ①In terms of installation layout: Two left sliding grooves (21501) are vertically fixed on both sides of the left support baffle (21112), and two right sliding grooves (21502) symmetrical to them are fixed on the left side wall of the right front support baffle (21114) and the right rear support baffle (21115) respectively. ② Filter screen fixing method: The filter screen (21504) is firmly pressed and fixed between the bracket frame (21503) and the pressure strip frame (21505) by the clamping screw (21506); ③ Component sliding and fixing method: The two sides of the bracket frame (21503) can slide up and down along the left slide groove (21501) and the right slide groove (21502). A fixing locking screw (21507) is provided on one side of the left slide groove (21501) and the right slide groove (21502).

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