A wastewater treatment system for reclaimed water membrane

Abstract

The invention discloses a wastewater treatment system for a reclaimed water membrane system, which relates to the technical field of wastewater treatment, including a coarse filtration separation mechanism, a pressurizing mechanism connected to the bottom of the coarse filtration separation mechanism, a filter press mechanism connected to the pressurizing mechanism and running in cooperation with the pressurizing mechanism, and a star-shaped pressurizing box connected to the coarse filtration separation mechanism through a flange, a second rotary motor fixedly installed at the bottom center of the star-shaped pressurizing box, an output end of the second rotary motor extending into the inner cavity of the star-shaped pressurizing box and fixedly connected to a rotating counterweight, a rotating counterweight rotatably connected to a turntable at the square end, a plurality of annularly distributed fixed shafts fixedly connected to the upper surface of the turntable, each fixed shaft is rotatably connected to a connecting rod, and each connecting rod is rotatably connected to a piston at one end away from the turntable, and each piston is slidably installed in a branch pipe of the star-shaped pressurizing box. The wastewater treatment system is used for a reclaimed water membrane system, so that wastewater can be filtered through a reverse osmosis membrane faster, thereby improving the filtration efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system for a reclaimed water membrane. Background Art

[0002] In industrial production, a large amount of wastewater is often generated, and the wastewater needs to be strictly treated before it can be discharged. Existing sewage treatment equipment usually uses reverse osmosis membranes for filtration treatment, but if there is no continuously operating wastewater pressurization mechanism to be used in conjunction with the reverse osmosis membrane, it is difficult for the wastewater to pass through the reverse osmosis membrane, and the filtration efficiency is low.

[0003] For example, the existing announcement number is: CN216785914U, which is a wastewater treatment reverse osmosis device, which "includes a pre-treatment box, a purification box and a siphon down-pipe, the pre-treatment box and the purification box are connected by a siphon down-pipe; a support frame is arranged at the bottom of the pre-treatment box, the pre-treatment box has a coarse filter chamber and a sedimentation chamber arranged up and down, the coarse filter chamber is connected to a wastewater pipe, and a coarse filter screen is also arranged in the coarse filter chamber; a detachable movable plate is arranged in the purification box, the movable plate is located at the upper part of the purification box and a reverse osmosis membrane is arranged on the movable plate, and the bottom of the purification box is connected to a clean water outlet pipe". Although the patent adopts a reverse osmosis membrane for filtration treatment, it does not provide a wastewater pressurizing mechanism matched with the reverse osmosis membrane, making it difficult for wastewater to pass through the reverse osmosis membrane, and the filtration efficiency is low. Therefore, a new type of wastewater treatment is needed for the reclaimed water membrane system. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a wastewater treatment method for a reclaimed water membrane system.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a wastewater treatment system for reclaimed water membrane, comprising a coarse filtration separation mechanism, the bottom of the coarse filtration separation mechanism is connected to a pressurizing mechanism, and the pressurizing mechanism is connected to a filter press mechanism that cooperates with the pressurizing mechanism;

[0008] The pressurizing mechanism comprises: a star-shaped pressurizing box connected with the coarse filtering and separating mechanism through a flange, a second rotating motor is fixedly installed at the bottom center of the star-shaped pressurizing box, an output end of the second rotating motor extends into the inner cavity of the star-shaped pressurizing box and is fixedly connected with a rotating counterweight block, a square head end of the rotating counterweight block is rotatably connected with a turntable, a plurality of annularly distributed fixed shafts are fixedly connected to the upper surface of the turntable, each of the fixed shafts is rotatably connected with a connecting rod, and each connecting rod is rotatably connected with a piston at one end away from the turntable, each of the pistons is slidably installed in a branch pipe of the star-shaped pressurizing box, and the number of annularly evenly distributed branch pipes of the star-shaped pressurizing box is the same as the number of pistons, a limiting column is coaxially fixedly connected to a side of each piston away from the connecting rod, each limiting column is slidably installed with a moving plug, and each moving plug is fixedly connected with a spring, each of the springs is fixedly connected to the circular plate end of the limiting column, a one-way valve is threadedly connected to the end of each branch pipe of the star-shaped pressurizing box, and each one-way valve is connected with a connecting pipe;

[0009] The filter press mechanism comprises: a filter press box whose inner cavity is connected with a plurality of connecting pipes, a rotating base is threadedly connected to the bottom of the filter press box, a filter element is threadedly connected to the center of the rotating base, and a ring-shaped bent reverse osmosis membrane is arranged in the annular cavity of the filter element.

[0010] As a preferred embodiment of the present invention, the turntable is rotatably connected to the rotating counterweight block through a rotating shaft at the bottom, the output end of the second rotating motor is coaxially fixedly connected with a sealed bearing, and the outer ring of the sealed bearing is fixedly connected to the star-shaped pressurizing box.

[0011] As a preferred embodiment of the present invention, each movable plug is provided with an annular protrusion for sealing the piston on the side facing the adjacent piston.

[0012] As a preferred embodiment of the present invention, the side wall of the filter element is made of two coaxial steel cylinders which are sleeved together, and both steel cylinders are provided with annularly distributed strip-shaped slits.

[0013] As a preferred embodiment of the present invention, a PP cotton layer is filled between the reverse osmosis membrane and the outer steel cylinder of the filter element, and an activated carbon layer is filled between the reverse osmosis membrane and the inner steel cylinder of the filter element.

[0014] As a preferred embodiment of the present invention, the coarse filtration separation mechanism includes: a coarse filtration box for preliminary solid-liquid separation, a collecting box is connected to the top notch of the coarse filtration box, the bottom of the coarse filtration box is connected to a collecting bucket, and the bottom of the collecting bucket is connected to a star-shaped pressurizing box.

[0015] As a preferred embodiment of the present invention, a placement bar is obliquely provided on two opposite side walls of the inner cavity of the coarse filter box, and the two placement bars extend to the top notch of the coarse filter box, and a coarse filter screen is placed on the two placement bars together, and an annular guide rail is arranged in parallel above each of the placement bars, and a chain is slidably installed inside each of the annular guide rails, and a number of movable scrapers evenly distributed along the chains are installed together on the two chains, each of the chains is meshed with a toothed disc, and each toothed disc is coaxially fixedly connected to a first rotating motor.

[0016] As a preferred embodiment of the present invention, the inner cavity of the collection box is funnel-shaped, and the inner cavity is connected to the bent pipe at its bottom.

[0017] As a preferred embodiment of the present invention, both ends of each of the movable scrapers are fixedly connected to the chain plates of the chain, each of the annular guide rails is provided with a notch for the toothed disc to pass through, and each of the first rotating motors is fixedly mounted on the outer wall of the coarse filter box.

[0018] As a preferred embodiment of the present invention, a connecting ring is fixedly connected to the bottom of the star-shaped pressurizing box, and the connecting ring is fixedly connected to the top of the filter press box.

[0019] Beneficial Effects

[0020] Compared with the prior art, the present invention provides a wastewater treatment system for a reclaimed water membrane system, which has the following beneficial effects:

[0021] The wastewater treatment is used in the reclaimed water membrane system. During the coarse filtration, the first rotating motor drives the toothed disc to rotate, and the toothed disc drives the chain to slide in the inner cavity of the annular guide rail. The chain drives the moving scraper close to the coarse filter to move upward, scraping the solid impurities above the coarse filter, so that the solid impurities flow into the collection box, so that the solid impurities filtered out of the industrial wastewater can be discharged continuously, without the need for manual cleaning after running for a period of time, thereby improving the continuous operation capacity;

[0022] This wastewater treatment is used in the reclaimed water membrane system. During pressurization, when the piston moves away from the second rotating motor, the one-way valve opens, and the moving plug presses the annular groove of the piston, so that the piston can pressurize the water in the branch pipe of the star-shaped pressurizing box and squeeze it out from the one-way valve. When the piston moves toward the second rotating motor, the one-way valve opens and closes. Under the water pressure, the moving plug slides along the limit column, so that the moving plug is separated from the piston. The water in the center of the inner cavity of the star-shaped pressurizing box flows into the branch pipe through the annular groove of the piston. When enough water flows into the branch pipe, the water pressure is balanced. Under the pressure of the spring, the moving plug presses the annular groove of the piston. Several branches of the star-shaped pressurizing box can pressurize the water in turn, so that the pressurized water continuously flows into the filter press mechanism for filtration. Thanks to the continuous pressurization of the wastewater by the pressurizing mechanism, the wastewater can be filtered through the reverse osmosis membrane faster, which improves the filtration efficiency.

[0023] This wastewater treatment is used in the reclaimed water membrane system. During filtration, the water flowing into the filter press box passes through the PP cotton layer of the filter element, the reverse osmosis membrane and the activated carbon layer of the filter element in turn, then flows to the center of the filter element, and finally is discharged through the drain pipe at the bottom center of the rotating base. The reverse osmosis membrane adopts a bent and folded design to increase the contact area with water, thereby improving the filtration efficiency of the reverse osmosis membrane. Thanks to the multi-layer filtration of the PP cotton layer, reverse osmosis membrane and activated carbon layer, the quality of the filtered water is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of another angle of an embodiment of the present invention;

[0026] Figure 3 An exploded view of a coarse filter separation mechanism without a coarse filter box, a collection box and a collection bucket according to an embodiment of the present invention;

[0027] Figure 4 For the embodiment of the present invention Figure 3 The enlarged view of point A in the middle;

[0028] Figure 5 It is a structural schematic diagram of a pressurizing mechanism according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the pressurizing mechanism without the one-way valve and the connecting pipe according to an embodiment of the present invention;

[0030] Figure 7 This is an exploded view of the pressurizing mechanism without the star-shaped pressurizing box, the one-way valve and the connecting pipe according to the embodiment of the present invention;

[0031] Figure 8 An exploded view of a piston, a limiting column, a moving plug and a spring according to an embodiment of the present invention;

[0032] Fig. 9 This is a schematic diagram of the structure of a movable plug according to an embodiment of the present invention;

[0033] Fig.10 An exploded view of a filter press mechanism according to an embodiment of the present invention;

[0034] Fig.11 It is a cross-sectional view of the filter element and reverse osmosis membrane according to an embodiment of the present invention.

[0035] In the figure:

[0036] 1. Coarse filter separation mechanism; 101. Coarse filter box; 102. Collecting box; 103. Collecting bucket; 104. Placement bar; 105. Coarse filter screen; 106. Annular guide rail; 107. Chain; 108. Moving scraper; 109. Tooth disc; 110. First rotating motor;

[0037] 2. Pressurizing mechanism; 201. Star-shaped pressurizing box; 202. One-way valve; 203. Connecting pipe; 204. Second rotating motor; 205. Sealed bearing; 206. Rotating counterweight; 207. Turntable; 208. Fixed shaft; 209. Connecting rod; 210. Piston; 211. Limiting column; 212. Moving plug; 213. Spring;

[0038] 3. Filter press mechanism; 301. Filter press box; 302. Filter element; 303. Rotating base; 304. Reverse osmosis membrane;

[0039] 4. Connecting ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-11 A wastewater treatment system for reclaimed water membranes includes a coarse filtration separation mechanism 1, the bottom of which is connected to a pressurizing mechanism 2, which is connected to a filter press mechanism 3 that cooperates with the pressurizing mechanism 2. The pressurizing mechanism 2 presses the sewage after coarse filtration so that the sewage can quickly pass through the reverse osmosis membrane 304 of the filter press mechanism 3, thereby improving the filtration efficiency. A connecting ring 4 is fixedly connected to the bottom of the star-shaped pressurizing box 201, and the connecting ring 4 is fixedly connected to the top of the filter press box 301.

[0042] The coarse filtration separation mechanism 1 comprises: a coarse filtration box 101 for preliminary solid-liquid separation, and a collecting box 102 is connected to the top notch of the coarse filtration box 101. The notch at the top of the coarse filtration box 101 is aligned with the notch at the top of the collecting box 102, so as to facilitate the transfer of solid impurities from the coarse filtration box 101 to the collecting box 102. The bottom of the coarse filtration box 101 is connected to a collecting hopper 103, and the bottom of the collecting hopper 103 is connected to the star-shaped pressurizing box 201.

[0043] A placement bar 104 is obliquely arranged on two opposite side walls of the inner cavity of the coarse filter box 101, and the two placement bars 104 extend to the top notch of the coarse filter box 101, and a coarse filter screen 105 is placed on the two placement bars 104. The top frame of the coarse filter screen 105 is flush with the top notch of the coarse filter box 101. The coarse filter screen 105 is used to filter out solid impurities in industrial wastewater. An annular guide rail 106 is arranged in parallel above each placement bar 104, and a chain 107 is slidably installed inside each annular guide rail 106. The two chains 107 are jointly installed with a plurality of moving scrapers 108 evenly distributed along the chains 107, and each chain 107 is meshed with a toothed disc 109, and each toothed disc 109 is coaxially fixedly connected with a first rotating motor 110. The toothed disc 109 is meshed with the rotating shaft of the chain 107. An annular protrusion is provided in the middle of the rotating shaft of the chain 107, so that the chain 107 can slide in the inner cavity of the annular guide rail 106 and cannot be separated. When the first rotating motor 110 drives the toothed disc 109 to rotate, the toothed disc 109 drives the chain 107 to slide in the inner cavity of the annular guide rail 106, and the chain 107 drives the moving scraper 108 near the coarse filter 105 to move upward, scraping the solid impurities above the coarse filter 105, so that the solid impurities flow into the collection box 102.

[0044] The inner cavity of the collecting box 102 is funnel-shaped, and the inner cavity is connected to the bend at its bottom. The bend at the bottom of the collecting box 102 is connected to a solid waste treatment pipeline. The solid impurities flowing into the inner cavity of the collecting box 102 are continuously discharged through the bend at its bottom. Both ends of each movable scraper 108 are fixedly connected to the chain plates of the chain 107. The movable scraper 108 moves with the chain plates. Each annular guide rail 106 is provided with a notch for the toothed disc 109 to pass through. The toothed disc 109 engages with the chain 107 through the notch of the annular guide rail 106. Each first rotating motor 110 is fixedly mounted on the outer wall of the coarse filter box 101. The output end of the first rotating motor 110 passes through the side wall of the coarse filter box 101 and is coaxially fixedly connected to the toothed disc 109.

[0045] The pressurizing mechanism 2 includes: a star-shaped pressurizing box 201 connected to the coarse filtration separation mechanism 1 through a flange, and a second rotating motor 204 is fixedly installed at the bottom center of the star-shaped pressurizing box 201. Through holes are set at the four corners of the second rotating motor 204, and bolts passing through the through holes are threadedly connected to the star-shaped pressurizing box 201. The output end of the second rotating motor 204 extends into the inner cavity of the star-shaped pressurizing box 201 and is fixedly connected to a rotating counterweight 206. One end of the rotating counterweight 206 is semicircular and the other end is square-headed, and the round head end is heavier than the square head end, and the round head end serves as a counterweight. The square head end of the rotating counterweight 206 is rotatably connected to a turntable 207, and the upper surface of the turntable 207 is fixedly connected to a plurality of annularly distributed fixed shafts 208, each of which is rotatably connected to a connecting rod 209, and each of which is rotatably connected to one end of the connecting rod 209 away from the turntable 207, and each of which is slidably connected to a piston 210, and each of which is slidably installed in a branch pipe of the star-shaped pressurizing box 201, and the number of annularly evenly distributed branch pipes of the star-shaped pressurizing box 201 is the same as the number of pistons 210. The piston 210 can reciprocate in the branch pipe of the star-shaped pressurizing box 201. Each piston 210 is coaxially fixedly connected to a limiting column 211 on one side away from the connecting rod 209, and each limiting column 211 is slidably installed with a moving plug 212, and each of which is fixedly connected to a spring 213, and each of which is fixedly connected to the circular plate end of the limiting column 211. When the piston 210 moves away from the second rotary motor 204, the one-way valve 202 opens, and the moving plug 212 presses the annular groove of the piston 210, so that the piston 210 can pressurize the water in the branch pipe of the star-shaped pressurizing box 201 and squeeze it out from the one-way valve 202. When the piston 210 moves toward the second rotary motor 204, the one-way valve 202 opens and closes. Under the water pressure, the moving plug 212 slides along the limit column 211, so that the moving plug 212 is separated from the piston 210, and the water in the center of the inner cavity of the star-shaped pressurizing box 201 flows into the branch pipe through the annular groove of the piston 210. When enough water flows into the branch pipe, the water pressure is balanced, and the moving plug 212 presses the annular groove of the piston 210 under the pressure of the spring 213. Each branch pipe end of the star-shaped pressurizing box 201 is threadedly connected with a one-way valve 202, and each one-way valve 202 is connected with a connecting pipe 203. The connecting pipe 203 is a pressure hose that can withstand the pressure of squeezing water through the one-way valve 202 through the piston 210. The one-way valve 202 can only discharge the water in the star-shaped pressurized box 201. A hexagonal nut is provided at one end of the one-way valve 202 away from the connecting pipe 203.

[0046] The turntable 207 is rotatably connected to the rotating counterweight 206 via a rotating shaft at the bottom. The turntable 207 cannot move along the axial direction of its own rotating shaft and can only rotate along the axis. The output end of the second rotating motor 204 is coaxially fixedly connected with a sealing bearing 205, and the outer ring of the sealing bearing 205 is fixedly connected to the star-shaped pressurizing box 201. Each movable plug 212 is provided with an annular protrusion for blocking the piston 210 on the side facing the adjacent piston 210. The annular protrusion of the movable plug 212 is provided with rounded corners to facilitate insertion into the annular groove of the piston 210. The annular protrusion of the movable plug 212 can be set to a rubber material to improve the sealing between the movable plug 212 and the piston 210.

[0047] The filter press mechanism 3 includes: a filter press box 301 whose inner cavity is connected to a plurality of connecting pipes 203, and a rotating base 303 is threadedly connected to the bottom of the filter press box 301. A drain pipe extends from the center of the bottom of the rotating base 303, which can be threadedly connected to other water pipes. A filter element 302 is threadedly connected to the center of the rotating base 303, and a circular bent reverse osmosis membrane 304 is arranged in the annular cavity of the filter element 302. The reverse osmosis membrane 304 requires a certain water pressure to quickly filter a certain amount of industrial wastewater. A hexagonal nut is arranged at the bottom of the filter element 302. The bent design of the reverse osmosis membrane 304 increases the contact area with water and improves the filtration efficiency of the reverse osmosis membrane 304. The side wall of the filter element 302 is made of two steel cylinders that are sleeved together and coaxial, and both steel cylinders are provided with strip-shaped slits distributed in an annular manner. Water flows in and out of the strip-shaped slits of the steel cylinder. A PP cotton layer is filled between the reverse osmosis membrane 304 and the outer steel cylinder of the filter element 302, and an activated carbon layer is filled between the reverse osmosis membrane 304 and the inner steel cylinder of the filter element 302. In order to show the structure of the reverse osmosis membrane 304 and the filter element 302, the PP cotton layer and the activated carbon layer are not drawn in the drawings of the specification. The water flowing into the filter press box 301 is pressurized by the pressurizing mechanism 2, passes through the PP cotton layer of the filter element 302, the reverse osmosis membrane 304 and the activated carbon layer of the filter element 302 in sequence, then flows to the center of the filter element 302, and finally is discharged through the drain pipe at the bottom center of the rotating base 303. During maintenance, the rotating base 303 can be unscrewed first, and then the filter element 302 can be unscrewed for replacement.

[0048] Working principle:

[0049] The wastewater treatment is used in the reclaimed water membrane system. During the coarse filtration, industrial wastewater is continuously poured into the coarse filter box 101, and the solid impurities are retained above the coarse filter screen 105. The water flows into the collection bucket 103 and then flows into the inner cavity of the star-shaped pressurizing box 201. At this time, the first rotating motor 110 drives the toothed disc 109 to rotate, and the toothed disc 109 drives the chain 107 to slide in the inner cavity of the annular guide rail 106. The chain 107 drives the moving scraper 108 close to the coarse filter screen 105 to move upward, scraping the solid impurities retained above the coarse filter screen 105, so that the solid impurities flow into the collection box 102. The solid impurities flowing into the inner cavity of the collection box 102 are continuously discharged through the curved pipe at the bottom thereof;

[0050] During pressurization, water flows into the center of the inner cavity of the star-shaped pressurizing box 201, and the second rotary motor 204 drives the rotary counterweight 206 to rotate. The rotary counterweight 206 drives the turntable 207 to make a circular motion, so that the turntable 207 drives the piston 210 in the branch pipe of the star-shaped pressurizing box 201 to make a reciprocating motion through the fixed shaft 208 and the connecting rod 209. When the piston 210 moves away from the second rotary motor 204, the one-way valve 202 opens, and the moving plug 212 presses the annular groove of the piston 210, so that the piston 210 can pressurize the branch pipe of the star-shaped pressurizing box 201. The water is pressurized and squeezed out from the one-way valve 202. The squeezed water is pressed into the filter press box 301 through the connecting pipe 203. When the piston 210 moves toward the direction close to the second rotary motor 204, the one-way valve 202 is opened and closed. Under the water pressure, the movable plug 212 slides along the limit column 211, so that the movable plug 212 is separated from the piston 210. The water in the center of the inner cavity of the star-shaped pressurizing box 201 flows into the branch pipe through the annular groove of the piston 210. When enough water flows into the branch pipe, the water pressure is balanced, and the movable plug 212 presses the annular groove of the piston 210 under the pressure of the spring 213.

[0051] During pressure filtration, the water pressurized by the pressurizing mechanism 2 flows into the filter press box 301. Under the action of pressure, the water in the inner cavity of the filter press box 301 flows from the outside of the filter element 302 to the center, passes through the PP cotton layer of the filter element 302, the reverse osmosis membrane 304 and the activated carbon layer of the filter element 302, and is finally discharged through the drain pipe at the bottom center of the rotating base 303.

[0052] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A wastewater treatment system for a reclaimed water membrane, comprising a coarse filtration separation mechanism (1), characterized in that: The bottom of the coarse filtration separation mechanism (1) is connected to a pressurizing mechanism (2), and the pressurizing mechanism (2) is connected to a filter pressing mechanism (3) that cooperates with the pressurizing mechanism (2) for operation; The pressurizing mechanism (2) comprises: a star-shaped pressurizing box (201) connected to the coarse filtering separation mechanism (1) via a flange; a second rotating motor (204) is fixedly mounted at the bottom center of the star-shaped pressurizing box (201); an output end of the second rotating motor (204) extends into the inner cavity of the star-shaped pressurizing box (201) and is fixedly connected to a rotating counterweight (206); a square end of the rotating counterweight (206) is rotatably connected to a rotating disk (207); a plurality of annularly distributed fixed shafts (208) are fixedly connected to the upper surface of the rotating disk (207); each of the fixed shafts (208) is rotatably connected to a connecting rod (209); and each connecting rod (209) is rotatably connected to a piston (210) at one end away from the rotating disk (207); The pistons (210) are all slidably mounted in the branch pipes of the star-shaped pressurizing box (201), and the number of the branch pipes of the star-shaped pressurizing box (201) evenly distributed in an annular shape is the same as the number of the pistons (210); a side of each piston (210) away from the connecting rod (209) is coaxially fixedly connected to a limiting column (211); each limiting column (211) is slidably mounted with a movable plug (212), and each movable plug (212) is fixedly connected to a spring (213); each spring (213) is fixedly connected to the circular plate end of the limiting column (211); each branch pipe end of the star-shaped pressurizing box (201) is threadedly connected to a one-way valve (202), and each one-way valve (202) is connected to a connecting pipe (203); The filter press mechanism (3) comprises: a filter press box (301) whose inner cavity is connected to a plurality of connecting pipes (203); the bottom of the filter press box (301) is threadedly connected to a rotating base (303); the center of the rotating base (303) is threadedly connected to a filter element (302); and an annular curved reverse osmosis membrane (304) is arranged in the annular cavity of the filter element (302); When pressurizing, water flows into the center of the inner cavity of the star-shaped pressurizing box (201), and the second rotating motor (204) drives the rotating counterweight (206) to rotate. The rotating counterweight (206) drives the rotating disk (207) to make a circular motion, so that the rotating disk (207) drives the piston (210) in the branch pipe of the star-shaped pressurizing box (201) to make a reciprocating motion through the fixed shaft (208) and the connecting rod (209). When the piston (210) moves in a direction away from the second rotating motor (204), the one-way valve (202) opens, and the moving plug (212) presses the annular groove of the piston (210), so that the piston (210) can move the star-shaped pressurizing box (201) The water in the branch pipe is pressurized and squeezed out from the one-way valve (202), and the squeezed water is pressed into the filter press box (301) through the connecting pipe (203); when the piston (210) moves in a direction close to the second rotating motor (204), the one-way valve (202) is opened and closed, and under the water pressure, the movable plug (212) slides along the limit column (211), so that the movable plug (212) is separated from the piston (210), and the water in the center of the inner cavity of the star-shaped pressurizing box (201) flows into the branch pipe through the annular groove of the piston (210). When enough water flows into the branch pipe, the water pressure is balanced, and the movable plug (212) presses the annular groove of the piston (210) under the pressure of the spring (213).

2. A wastewater treatment system for reclaimed water according to claim 1, characterized in that: The rotating disk (207) is rotationally connected to the rotating counterweight (206) via a rotating shaft at the bottom, the output end of the second rotating motor (204) is coaxially fixedly connected to a sealed bearing (205), and the outer ring of the sealed bearing (205) is fixedly connected to the star-shaped pressurizing box (201).

3. The wastewater treatment system for reclaimed water according to claim 1, characterized in that: Each movable plug (212) is provided with an annular protrusion on a side facing the adjacent piston (210) for sealing the piston (210).

4. The wastewater treatment system for reclaimed water according to claim 1, characterized in that: The side wall of the filter element (302) is made of two steel cylinders which are sleeved together and have the same axis, and both steel cylinders are provided with annularly distributed strip-shaped slits.

5. A wastewater treatment system for reclaimed water according to claim 4, characterized in that: A PP cotton layer is filled between the reverse osmosis membrane (304) and the outer steel cylinder of the filter element (302), and an activated carbon layer is filled between the reverse osmosis membrane (304) and the inner steel cylinder of the filter element (302).

6. The wastewater treatment system for reclaimed water according to claim 1, characterized in that: The coarse filtration separation mechanism (1) comprises: a coarse filtration box (101) for preliminary solid-liquid separation, a collection box (102) connected to a notch at the top of the coarse filtration box (101), a collection hopper (103) connected to the bottom of the coarse filtration box (101), and a bottom of the collection hopper (103) connected to a star-shaped pressurizing box (201).

7. A wastewater treatment system for reclaimed water according to claim 6, characterized in that: A placement bar (104) is obliquely arranged on two opposite side walls of the inner cavity of the coarse filter box (101), and the two placement bars (104) extend to the top notch of the coarse filter box (101). A coarse filter screen (105) is placed on the two placement bars (104). An annular guide rail (106) is arranged in parallel above each placement bar (104). A chain (107) is slidably installed inside each annular guide rail (106). The two chains (107) are jointly installed with a plurality of moving scrapers (108) evenly distributed along the chains (107). Each chain (107) is meshed with a toothed disc (109), and each toothed disc (109) is coaxially fixedly connected to a first rotating motor (110).

8. The wastewater treatment system for reclaimed water according to claim 6, characterized in that: The inner cavity of the collection box (102) is funnel-shaped, and the inner cavity is connected to the bent pipe at its bottom.

9. A wastewater treatment system for reclaimed water according to claim 7, characterized in that: Both ends of each movable scraper (108) are fixedly connected to the chain plates of the chain (107), each annular guide rail (106) is provided with a notch for the toothed disc (109) to pass through, and each first rotating motor (110) is fixedly mounted on the outer wall of the coarse filter box (101).

10. The wastewater treatment system for reclaimed water according to claim 1, characterized in that: A connecting ring (4) is fixedly connected to the bottom of the star-shaped pressurizing box (201), and the connecting ring (4) is fixedly connected to the top of the filter press box (301).

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