Small integrated sewage treatment equipment suitable for rural areas

Abstract

The application discloses a small integrated sewage treatment equipment suitable for rural areas and relates to the technical field of sewage treatment.The small integrated sewage treatment equipment suitable for rural areas comprises an open box, an extrusion through hole is formed in the left side wall of the open box, and an overflow pipe is arranged on the right side wall of the open box; an inner side plate is arranged in the middle of the open box, a semicircular sieve plate is arranged between the left side wall of the open box and the bottom of the inner side plate, a circular through hole is formed in the middle of the inner side plate, a hollow rotating drum is arranged in the circular through hole, the hollow rotating drum is connected with the inner side plate through a reciprocating mechanism, a conical rotating drum is arranged on the left side wall of the hollow rotating drum, and a spiral extrusion belt is arranged on the outer surface of the conical rotating drum; a fixed side plate is arranged on the right side in the open box, a pair of filter assemblies are arranged between the left side wall of the open box and the bottom of the fixed side plate, and a purification and sedimentation tank is formed between the fixed side plate and the right side wall of the open box.The small integrated sewage treatment equipment can realize efficient solid-liquid separation, can effectively prevent the filter assemblies from being blocked and can comprehensively solve the problem that the composition of sewage in rural areas is complex.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a small-scale integrated wastewater treatment device suitable for rural areas. Background Technology

[0002] Wastewater treatment plays a crucial role in environmental governance in rural areas, but due to relatively underdeveloped infrastructure, large-scale, efficient wastewater treatment is difficult to achieve. In the field of rural wastewater treatment, existing technologies mostly employ traditional septic tanks, constructed wetlands, or single filtration devices. While traditional septic tanks have a simple structure, they only achieve primary sedimentation, with limited effectiveness in removing organic matter, heavy metals, and microorganisms. Constructed wetlands rely on natural ecosystems, occupy large areas, and are significantly affected by climate, with treatment efficiency dropping sharply in winter.

[0003] Single filtration devices, such as sand filters, suffer from insufficient filtration precision, easy clogging, and frequent filter media replacement when dealing with complex rural domestic sewage (containing suspended solids, colloids, organic matter, heavy metals, and pathogenic microorganisms). Furthermore, existing equipment generally suffers from low automation and high maintenance costs, making it difficult to adapt to the lack of professional maintenance personnel in rural areas and unsuitable for the dispersed layout of rural homesteads. This results in low sewage collection and treatment efficiency and low water quality compliance rates. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of insufficient filtration accuracy, easy clogging, and frequent replacement of filter media in the existing technology of rural domestic sewage, and to propose a small integrated sewage treatment equipment suitable for rural areas.

[0005] To address the problems existing in the prior art, the present invention adopts the following technical solution:

[0006] A small-scale integrated sewage treatment device suitable for rural areas includes an open box. The left side wall of the open box has a compression through hole. The left side wall of the open box is fixed with an inclined plate that is distributed obliquely downward and backward. The right side wall of the open box is fixed with an overflow pipe that is distributed through. The bottom of the open box has several trapezoidal support legs that are distributed at equal intervals on both the front and rear sides.

[0007] An inner side plate with a semi-circular bottom is fixed in the middle of the open box. A semi-circular sieve plate is fixed between the left side wall of the open box and the bottom of the inner side plate. A circular through hole is opened in the middle of the inner side plate. A hollow rotating cylinder is rotatably installed inside the circular through hole. The hollow rotating cylinder is connected to the inner side plate through a reciprocating mechanism. A conical rotating cylinder is fixed on the left side wall of the hollow rotating cylinder. A spiral extrusion band is fixed on the outer surface of the conical rotating cylinder.

[0008] A fixed side plate is fixedly installed on the right side inside the open box. A pair of filter components are provided between the bottom of the left side wall of the open box and the fixed side plate. A purification sedimentation tank is formed between the fixed side plate and the right side wall of the open box.

[0009] Preferably, a hollow retaining ring is fixedly provided on the right side wall of the inner side plate, the hollow retaining ring is distributed in a through-hole, and a concentrically fixed annular retaining rail is fitted on the outer ring surface of the hollow rotating cylinder, the outer ring surface of the annular retaining rail is rotatably engaged in the hollow retaining ring.

[0010] A fixing plate is fixed to the top of one side where the open box and the inner side plate intersect. A through-type inverted conical bucket is fixed to the middle of the fixing plate. Several evenly distributed filter holes are opened on the semi-circular sieve plate. Several evenly distributed leakage holes are opened on the outer surface of the conical rotating cylinder. The filter holes and leakage holes have the same inner diameter.

[0011] Preferably, a three-claw bracket is fixedly provided on the left side wall of the open box, a fixing ring is fixedly provided in the middle of the three-claw bracket, a fixing shaft is rotatably inserted in the middle of the fixing ring, and the right end of the fixing shaft passes through the extrusion hole and is coaxially fixedly connected to the left end of the conical rotating cylinder.

[0012] The middle section of the fixed shaft is fitted with a concentrically fixed sleeve. The left end of the fixed sleeve is fitted with a concentrically fixed retaining ring. The right end of the fixed sleeve is slidably fitted with a compression retaining ring. The middle section of the fixed sleeve is fitted with a tension spring. The two ends of the tension spring are respectively fixed to the fixed retaining ring and the compression retaining ring, and the compression retaining ring is pressed against the outside of the compression through hole.

[0013] Preferably, a fixed vertical plate is fixedly provided at the center of the top surface of the inner side plate, an L-shaped connecting rod is fixedly provided at the bottom of the right side of the fixed vertical plate, a reciprocating shaft is rotatably inserted at the top of the L-shaped connecting rod, a small-diameter sprocket is sleeved on the right end of the reciprocating shaft, a large-diameter sprocket is sleeved on the right end of the hollow rotating cylinder, and the small-diameter sprocket is connected to the large-diameter sprocket by a drive chain.

[0014] Preferably, the reciprocating mechanism includes a notched gear ring, a notched gear, and a reciprocating gear. The top of the fixed vertical plate is provided with a first through hole. A first motor is fixedly installed inside the first through hole. A three-jaw turntable is fixedly provided in the middle of the motor shaft of the first motor. Notched gear rings are fixedly provided at the three ends of the three-jaw turntable. Notched gears are fixedly provided at the ends of the motor shaft of the first motor.

[0015] The left end of the reciprocating shaft is fitted with a reciprocating gear that is concentrically fixed. The reciprocating gear is located between the notched gear and the notched gear ring, and the notched gear and the notched gear ring alternately mesh with the reciprocating gear.

[0016] Preferably, the filter assembly comprises, from the outside to the inside, a metal mesh layer, a medium-efficiency filter layer, an adsorption filter layer, a precision filter layer, and an auxiliary disinfection layer; the metal mesh layer is a mesh structure formed by interwoven longitudinal and transverse metal lines, with a wall thickness of 50-100 mm and a pore size of 5-10 mm; the medium-efficiency filter layer is composed of alternating layers of sand and filter cloth, with a wall thickness of 100-150 mm, the sand layer using fine quartz sand with a particle size of 0.5-2 mm, and the filter cloth using polyester fiber filter cloth with a pore size of 10-50 μm;

[0017] The adsorption filtration layer is composed of activated carbon, zeolite, and diatomaceous earth, with a wall thickness of 80-120 mm. The precision filtration layer, from the outside to the inside, includes a polypropylene membrane, a sintered activated carbon filter element, and a hollow fiber membrane, with a wall thickness of 5-20 mm. The pore size of the polypropylene membrane is 0.1-1 μm, and the pore size of the hollow fiber membrane is 0.01-0.1 μm. The auxiliary disinfection layer, from the outside to the inside, includes an ultraviolet sterilization layer and an inner filter mesh skeleton, with a wall thickness of 30-50 mm.

[0018] Preferably, a first turntable is fixedly provided at the left end of the filter assembly, a sliding shaft is fixedly provided in the middle of the first turntable, a pair of hollow shafts are rotatably inserted into the bottom of the left side wall of the open box, each of the sliding shafts is slidably inserted into the corresponding hollow shaft, a pair of limiting slots are provided on the inner ring surface of the hollow shaft, a pair of limiting protrusions are fixed on the outer surface of the sliding shaft, and each limiting protrusion is slidably engaged in the corresponding limiting slot;

[0019] The filter assembly has a second turntable fixed at its right end, and a through-distributed flow guide cylinder is fixed in the middle of the second turntable. A pair of flow guide holes are opened at the two corners at the bottom of the fixed side plate, and each flow guide cylinder is slidably inserted into the corresponding flow guide hole.

[0020] Preferably, an L-shaped connecting plate is fixedly provided at the bottom of the left side wall of the open box, and a vertically distributed rectangular connecting plate is fixedly provided at the top of the L-shaped connecting plate. A pair of rectangular sliding holes are provided at both ends of the rectangular connecting plate, and a rectangular sliding plate is slidably inserted into the interior of each rectangular sliding hole. A rectangular sleeve is fixedly provided at the right end of each rectangular sliding plate.

[0021] Each sliding shaft has a rotating head fixedly mounted on its left end. Each rotating head is rotatably engaged in a corresponding rectangular sleeve. Each hollow shaft has a concentrically fixed gear mounted on its left end, and a pair of fixed gears are meshed together.

[0022] Preferably, a fixed lug is fixedly provided in the middle of the left side wall of the L-shaped connecting plate, and a double-headed swing arm is hinged to the outer end of the fixed lug. The rear half of the double-headed swing arm is thickened, and elliptical pin holes are provided at both the front and rear ends of the double-headed swing arm. A limiting pin is fixedly provided at the left end of each rectangular slide plate, and each limiting pin is slidably inserted into the corresponding elliptical pin hole.

[0023] A fixed horizontal plate is fixedly provided at the bottom of the left side wall of the open box. A second through hole is provided at the left end of the fixed horizontal plate. A second motor is fixedly installed inside the second through hole. A fixed turntable is fixedly provided at the end of the motor shaft of the second motor. An eccentric pin is fixedly provided on the top surface of the fixed turntable. The top end of the eccentric pin is slidably inserted into the corresponding elliptical pin hole.

[0024] Preferably, a linkage shaft is rotatably inserted into the right side of the top surface of the fixed horizontal plate, and a first bevel gear is concentrically fixed at the top end of the linkage shaft. The left end of a hollow shaft extends to the left and is fitted with a second bevel gear concentrically fixed, and the first bevel gear and the second bevel gear are meshed and connected.

[0025] The outer ring of the fixed turntable is fitted with a large-diameter pulley that is concentrically fixed, and the middle part of the linkage shaft is fitted with a small-diameter pulley. The small-diameter pulley is connected to the large-diameter pulley via a drive belt.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. In this invention, efficient solid-liquid separation is achieved through the combination of a conical rotating drum and a spiral extrusion belt. The spiral extrusion belt uses its spiral angle to push solid waste to the extrusion through-hole for discharge. The tension spring drives the extrusion retaining ring for secondary dehydration, reducing the water content of the solid matter. The semi-circular screen plate and the water leakage hole of the conical rotating drum provide preliminary filtration of wastewater. All components work together to reduce the burden on subsequent deep treatment, effectively separating solid and liquid components in wastewater and improving treatment efficiency.

[0028] 2. In this invention, a multi-layer composite filtration assembly is used to specifically treat different impurities. The metal mesh layer intercepts large particles of impurities, reducing the subsequent load; the medium-efficiency filtration layer removes medium-sized particles of impurities; the adsorption filtration layer adsorbs organic matter and heavy metals; the precision filtration layer traps tiny particles and bacteria; and the auxiliary disinfection layer inactivates microorganisms. This graded filtration mode comprehensively solves the problem of complex composition of rural sewage, ensuring that the effluent water quality meets the standards for reuse or discharge, and achieving a high water quality compliance rate.

[0029] 3. In this invention, the filter components are driven to rotate and reciprocate by a second motor, and a fixed gear causes a pair of filter components to rotate in opposite directions. The eccentric pin shaft drives the double-headed swing arm to slide back and forth, preventing impurities from accumulating and clogging the filter layer. Furthermore, this dynamic motion can enhance the contact between wastewater and the filter medium, improve the pollutant retention rate, reduce the frequency of manual maintenance, extend the service life of the filter components, and reduce operating costs.

[0030] In summary, this invention forms a complete treatment system from solid-liquid separation to deep filtration and dynamic anti-clogging design; the equipment has a compact structure, is suitable for rural scenarios, and ensures water quality safety through multi-stage treatment; solid-liquid separation and multi-layer filtration ensure purification effect, dynamic filtration extends the service life of filter components, reduces operation and maintenance costs, and provides an efficient, economical, and sustainable solution for rural sewage treatment. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention from one perspective;

[0033] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;

[0034] Figure 3 This is a cross-sectional view of the overall structure of the present invention;

[0035] Figure 4 This is a cross-sectional schematic diagram of the open box, hollow rotating cylinder, and conical rotating cylinder of the present invention;

[0036] Figure 5 This is an exploded cross-sectional view of the open box, hollow rotating cylinder, and conical rotating cylinder of the present invention.

[0037] Figure 6 This is a cross-sectional schematic diagram of the open box and a pair of filter components of the present invention;

[0038] Figure 7 This is an exploded cross-sectional view of the open box and a pair of filter components of the present invention;

[0039] Figure 8 This is a transmission diagram of the hollow shaft, sliding shaft, and fixed gear of the present invention;

[0040] Figure 9 This is an exploded view of the transmission of the hollow shaft, sliding shaft, and fixed gear of the present invention.

[0041] Figure 10 This is a schematic diagram of the structure of the filter assembly of the present invention;

[0042] Figure 11 This is a cross-sectional schematic diagram of the filter assembly of the present invention;

[0043] Figure 12 This is an exploded cross-sectional view of the filter assembly of the present invention;

[0044] The following are the serial numbers in the diagram: 100. Open box; 101. Trapezoidal support leg; 102. Extrusion through hole; 103. Overflow pipe; 104. Inclined plate; 105. Semi-circular sieve plate; 106. Inner side plate; 107. Hollow retaining ring; 108. Fixed side plate; 109. Three-jaw bracket; 110. Fixed ring; 111. Fixed plate; 112. Inverted conical bucket; 200. Hollow rotating drum; 201. Conical rotating drum; 202. Spiral extrusion belt; 203. Fixed shaft; 204. Fixed retaining ring; 205. Fixed sleeve; 206. Extrusion retaining ring; 207. Tension spring; 208. Fixed vertical plate; 209. L-shaped connecting rod; 210. First motor; 211. Three-jaw turntable; 212. Notched gear ring; 213. Notched gear; 214. Reciprocating shaft; 215. Reciprocating gear; 216. 1. Drive chain belt; 217. Circular track; 300. Hollow shaft; 301. Fixed gear; 302. Sliding shaft; 303. First turntable; 304. Second turntable; 305. Guide slide; 306. Metal mesh layer; 307. Medium-efficiency filter layer; 308. Adsorption filter layer; 309. Precision filter layer; 310. Auxiliary disinfection layer; 400. Fixed horizontal plate; 401. Second motor; 402. Fixed turntable; 403. Eccentric pin; 404. Linkage shaft; 405. Drive belt; 406. First bevel gear; 407. Second bevel gear; 408. L-shaped connecting plate; 409. Fixed lug; 410. Double-headed swing arm; 411. Rectangular connecting plate; 412. Rectangular sliding plate; 413. Limiting pin; 414. Rectangular sleeve; 415. Rotating head. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0046] Example 1: This example provides a small-scale integrated sewage treatment device suitable for rural areas. See [link / reference]. Figures 1-12The equipment includes an open box 100, which serves as the main body of the equipment, providing installation space for other components and is also the main place for sewage to be treated after entering the equipment. A squeezing through hole 102 is provided on the left side wall of the open box 100 for discharging solid waste. An inclined plate 104 is fixedly provided on the left side wall of the open box 100, which is distributed downwards and backwards. The inclined plate 104 is used to receive the solid waste discharged from the squeezing through hole 102 and let it slide down to the designated collection area. An overflow pipe 103 is fixedly provided on the right side wall of the open box 100, which is used to discharge the treated water in the purification sedimentation tank that meets the standards from the equipment. Several trapezoidal support legs 101 are fixedly provided on the front and rear sides of the bottom of the open box 100, which are used to support the open box 100 and keep the equipment stable.

[0047] An inner side plate 106 with a semi-circular bottom is fixedly installed in the center of the open box 100. The inner side plate 106 is used to divide the internal space of the open box 100 and to provide an installation base for components such as the hollow rotating cylinder 200. A semi-circular screen plate 105 is fixed between the left side wall of the open box 100 and the bottom of the inner side plate 106. The semi-circular screen plate 105 is used for preliminary filtration of sewage, allowing some wastewater to flow into the bottom of the open box 100 through its filter holes. A circular through hole is opened in the center of the inner side plate 106, and a hollow rotating cylinder 200 is rotatably installed inside the circular through hole. The hollow rotating drum 200 can guide the flow of some wastewater inside. The hollow rotating drum 200 is connected to the inner side plate 106 through a reciprocating mechanism. A conical rotating drum 201 is fixedly provided on the left side wall of the hollow rotating drum 200. The hollow rotating drum 200 and the conical rotating drum 201 are coaxially connected. The water leakage holes on the surface of the conical rotating drum 201 allow some wastewater to enter its interior. A spiral extrusion belt 202 is fixedly provided on the outer surface of the conical rotating drum 201. The spiral extrusion belt 202 is used to separate solid and liquid wastewater. It uses the spiral rise angle to generate axial thrust and pushes solid waste to the extrusion through hole 102.

[0048] A fixed side plate 108 is fixedly installed on the right side inside the open box 100. A pair of filter components are provided between the left side wall of the open box 100 and the bottom of the fixed side plate 108. The fixed side plate 108 is used to provide an installation position for the filter components. A purification sedimentation tank is formed between the fixed side plate 108 and the right side wall of the open box 100.

[0049] It should be noted that: In this embodiment, a hollow retaining ring 107 is fixedly provided on the right side wall of the inner side plate 106. The hollow retaining ring 107 is distributed in a through-hole. A concentrically fixed annular retaining rail 217 is sleeved on the outer ring surface of the hollow rotating cylinder 200. The outer ring surface of the annular retaining rail 217 is rotatably engaged in the hollow retaining ring 107. The hollow retaining ring 107 cooperates with the annular retaining rail 217 to provide guidance and support for the rotation of the hollow rotating cylinder 200, so that the hollow rotating cylinder 200 can make circumferential motion along the circular through-hole of the inner side plate 106.

[0050] A fixing plate 111 is fixed to the top of one side where the open box 100 and the inner side plate 106 intersect. The fixing plate 111 is used to provide structural support for the sewage introduction. A through-type inverted conical bucket 112 is fixed to the middle of the fixing plate 111. The inverted conical bucket 112 is used to guide farmers to pour domestic sewage into the open box 100. A number of evenly distributed filter holes are opened on the semi-circular screen plate 105. A number of evenly distributed leakage holes are opened on the outer surface of the conical rotating cylinder 201. The filter holes and leakage holes have the same inner diameter.

[0051] In the specific implementation process, such as Figure 4 and Figure 5 As shown, a three-jaw bracket 109 is fixedly mounted on the left side wall of the open box 100. A fixing ring 110 is fixedly mounted in the middle of the three-jaw bracket 109. A fixing shaft 203 is rotatably inserted into the middle of the fixing ring 110. The right end of the fixing shaft 203 passes through the extrusion hole 102 and is coaxially fixed to the left end of the conical rotating cylinder 201. The three-jaw bracket 109 and the fixing ring 110 provide a rotation support point for the fixing shaft 203, so that the fixing shaft 203 can rotate stably. The fixing shaft 203 is connected to the conical rotating cylinder 201 to transmit rotational power.

[0052] A fixed sleeve 205 is concentrically fixed to the middle section of the fixed shaft 203. A fixed retaining ring 204 is concentrically fixed to the left end of the fixed sleeve 205. A compression retaining ring 206 is slidably fitted to the right end of the fixed sleeve 205. A tension spring 207 is fitted to the middle section of the fixed sleeve 205. The two ends of the tension spring 207 are fixed to the fixed retaining ring 204 and the compression retaining ring 206, respectively, and the compression retaining ring 206 abuts against the outside of the compression through hole 102. The fixed sleeve 205 is used for... The mounting and sliding tracks are provided for the fixed retaining ring 204 and the compression retaining ring 206, respectively. The fixed retaining ring 204 is used to limit the sliding position of the compression retaining ring 206 and cooperates with the tension spring 207 to compress the solid waste. When the spiral compression belt 202 pushes the solid waste, the compression retaining ring 206 overcomes the elastic force of the tension spring 207 and slides, performing secondary compression and dehydration on the solid waste. The tension spring 207 provides elastic support for the compression retaining ring 206, assisting in the compression and dehydration of the solid waste.

[0053] A fixed vertical plate 208 is fixedly provided in the middle of the top surface of the inner side plate 106. An L-shaped connecting rod 209 is fixedly provided at the bottom of the right side of the fixed vertical plate 208. A reciprocating shaft 214 is rotatably inserted at the top of the L-shaped connecting rod 209. A small-diameter sprocket is concentrically fixed at the right end of the reciprocating shaft 214. A large-diameter sprocket is concentrically fixed at the right end of the hollow rotating drum 200. The small-diameter sprocket is connected to the large-diameter sprocket through a drive chain belt 216.

[0054] The reciprocating mechanism includes a notched gear ring 212, a notched gear 213, and a reciprocating gear 215. The top of the fixed vertical plate 208 has a first through hole, and a first motor 210 is fixedly installed inside the first through hole. A three-jaw turntable 211 is fixedly installed in the middle of the motor shaft of the first motor 210. The three ends of the three-jaw turntable 211 are fixedly provided with concentrically distributed notched gear rings 212. The end of the motor shaft of the first motor 210 is fixedly provided with a notched gear 213. The left end of the reciprocating shaft 214 is fitted with a concentrically fixed reciprocating gear 215. The reciprocating gear 215 is located between the notched gear 213 and the notched gear ring 212, and the notched gear 213 and the notched gear ring 212 are alternately meshed with the reciprocating gear 215.

[0055] The fixed vertical plate 208 is used to install components such as the first motor 210, providing a mounting base for the reciprocating mechanism; the L-shaped connecting rod 209 is used to connect the fixed vertical plate 208 and the reciprocating shaft 214, and transmit rotational power; the reciprocating shaft 214 is used to connect the small-diameter sprocket and the reciprocating gear 215, transmit power and realize the change of direction rotation; the small-diameter sprocket and the large-diameter sprocket are meshed and driven by the drive chain belt 216, which transmits the rotation of the reciprocating shaft 214 to the hollow drum 200;

[0056] The first motor 210 serves as the core power source, driving the three-jaw turntable 211, the notched gear ring 212, and the notched gear 213 to rotate. The three-jaw turntable 211 is used to install the notched gear ring 212 and rotates under the drive of the first motor 210, assisting in achieving directional rotation.

[0057] The notched gear ring 212 and the notched gear 213 mesh alternately, driving the reciprocating gear 215 to achieve periodic reversible rotation; the reciprocating gear 215 achieves reversible rotation under the action of the notched gear ring 212 and the notched gear 213.

[0058] The working principle of this embodiment is as follows: When started, the first motor 210 serves as the core power source, and its motor shaft drives the three-jaw turntable 211, the notched gear ring 212, and the notched gear 213 to rotate synchronously; the notched gear ring 212 and the notched gear 213 drive the reciprocating gear 215 to achieve periodic directional rotation through a unique alternating meshing design—first completing three rounds of forward rotation, and then performing a small-amplitude reverse rotation;

[0059] The reciprocating gear 215 drives the reciprocating shaft 214 to rotate, and through the small-diameter sprocket fixed on it, it meshes with the large-diameter sprocket at the end of the hollow drum 200 via the drive chain belt 216. As a result, the hollow drum 200 and the conical drum 201 and the spiral extrusion belt 202 connected coaxially move in a circular motion along the circular through hole of the inner side plate 106 under the guidance of the annular retaining rail 217 and the hollow retaining ring 107. At the same time, the fixed shaft 203, which is coaxially fixed to the conical drum 201, drives the fixed sleeve 205, the fixed retaining ring 204, the tension spring 207 and the extrusion retaining ring 206 to rotate synchronously.

[0060] In the wastewater treatment process, farmers introduce domestic sewage into an open box 100 through an inverted conical hopper 112. A spiral extrusion belt 202 is attached to the outer surface of a conical rotating drum 201. During rotation, the axial thrust generated by the spiral angle gradually pushes the solid waste in the sewage to the extrusion through hole 102. During this process, a tension spring 207 provides elastic support for the extrusion retaining ring 206. When the solid waste is subjected to continuous thrust from the spiral extrusion belt 202, the extrusion retaining ring 206 overcomes the elastic force of the tension spring 207 and slides along the fixed sleeve 205 toward the fixed retaining ring 204, achieving secondary extrusion and dehydration of the solid waste. The dehydrated solids are discharged through the extrusion through hole 102 and slide down the inclined plate 104 to the designated collection area.

[0061] During the solid-liquid separation process, some wastewater enters the internal cavity of the conical rotating drum 201 through the water leakage holes on its surface, and then flows into the semi-circular sieve plate 105 through the water leakage holes on its bottom surface, or flows into the filter assembly at the bottom of the open box 100 through the right port of the hollow rotating drum 200; the remaining wastewater falls directly onto the semi-circular sieve plate 105; the wastewater falling into the semi-circular sieve plate 105 undergoes preliminary filtration through the water filter holes on it and then falls into the filter assembly; under the action of the filter assembly, it undergoes multiple physical filtrations; finally, the purified water flows into the purification sedimentation tank formed by the fixed side plate 108 and the right side wall of the open box 100, and is discharged through the overflow pipe 103.

[0062] Example 2: Based on Example 1, this example innovatively designs a multi-layer composite filter assembly. Specifically, the filter assembly consists of a metal mesh layer 306, a medium-efficiency filter layer 307, an adsorption filter layer 308, a precision filter layer 309, and an auxiliary disinfection layer 310, from the outside to the inside. This example clearly defines the material, structural parameters, and functions of each layer, solving the problem that a single filtration method cannot simultaneously remove large particulate impurities, dissolved pollutants, and microorganisms.

[0063] In the specific implementation process, such as Figure 10 and Figure 12 As shown, the filter assembly, from the outside to the inside, includes a metal mesh layer 306, a medium-efficiency filter layer 307, an adsorption filter layer 308, a precision filter layer 309, and an auxiliary disinfection layer 310. The metal mesh layer 306 is a mesh structure formed by interwoven longitudinal and transverse metal lines, with a wall thickness of 50-100mm and a pore size of 5-10mm. It is used to intercept large particulate impurities (such as suspended solids, silt, fibers, etc.) and reduce the load on subsequent filter layers. As the first line of defense of the filter assembly, the metal mesh layer 306, through its specific pore size and wall thickness design, can quickly intercept large particulate impurities in wastewater, extend the service life of subsequent filter layers, and reduce the frequency of equipment maintenance.

[0064] The medium-efficiency filter layer 307 is composed of alternating layers of sand and filter cloth to enhance the interception effect. The wall thickness is 100-150mm. The sand layer uses fine quartz sand with a particle size of 0.5-2mm, and the filter cloth uses polyester fiber filter cloth with a pore size of 10-50μm. The medium-efficiency filter layer 307 is used to remove medium-sized particulate impurities (such as colloids, fine sand, and some organic matter). The medium-efficiency filter layer 307 utilizes the synergistic effect of different materials to further remove medium-sized particulate impurities, laying the foundation for subsequent deep purification.

[0065] The adsorption filter layer 308 is composed of activated carbon, zeolite, and diatomaceous earth, with a wall thickness of 80-120mm. It is used to adsorb organic matter, heavy metals, odors, and some dissolved impurities. The activated carbon is granular or blocky, with a large surface area and strong adsorption capacity. The zeolite / diatomaceous earth is used to adsorb heavy metal ions and also plays a filtering role. The adsorption filter layer 308 is composed of a variety of adsorption materials, which can chemically and physically adsorb complex pollutants such as organic matter, heavy metals, and odors, significantly improving the water purification level.

[0066] The precision filter layer 309 comprises, from the outside to the inside, a polypropylene membrane, a sintered activated carbon filter element, and a hollow fiber membrane, with a wall thickness of 5-20 mm. The pore size of the polypropylene membrane is 0.1-1 μm, and the pore size of the hollow fiber membrane is 0.01-0.1 μm. The precision filter layer 309 is a combination of multiple high-precision filter materials, which can accurately intercept tiny particles and microorganisms, ensuring that the effluent water quality meets strict standards.

[0067] The auxiliary disinfection layer 310 consists of an ultraviolet sterilization layer and an inner filter mesh skeleton from the outside to the inside, with a wall thickness of 30-50mm. For wastewater with excessive microorganisms, the auxiliary disinfection layer 310, through the cooperation of the ultraviolet sterilization layer and the inner filter mesh skeleton, specifically solves the problem of excessive microorganisms, providing the last safety guarantee for purified water.

[0068] The working principle of this embodiment is as follows: After solid-liquid separation is completed in Embodiment 1, the wastewater enters the filter assembly in an orderly manner to start the deep purification process. The wastewater first impacts the metal mesh layer 306. The crisscrossing 50-100mm thick metal mesh layer 306, with a pore size of 5-10mm, quickly intercepts large particulate impurities such as suspended solids, silt, and fibers, effectively reducing the treatment load of subsequent filter layers. Subsequently, the wastewater permeates to the medium-efficiency filter layer 307, where medium-sized particulate impurities such as colloids, fine sand, and some organic matter are intercepted through physical interception and adsorption.

[0069] When the wastewater reaches the adsorption filter layer 308, the mixed structure of 80-120mm thick activated carbon, zeolite, and diatomaceous earth plays a core role in purification. The granular activated carbon, with its huge specific surface area, strongly adsorbs organic matter and odors, while zeolite and diatomaceous earth specifically capture heavy metal ions, achieving efficient removal of dissolved impurities. Next, the wastewater enters the precision filter layer 309, where it passes through a 5-20mm composite structure composed of a polypropylene membrane (pore size 0.1-1μm), a sintered activated carbon filter element, and a hollow fiber membrane (pore size 0.01-0.1μm), which acts like a multi-layered filter screen, trapping all tiny particles, bacteria, and colloids.

[0070] Finally, the wastewater with excessive microorganisms undergoes final purification in the auxiliary disinfection layer 310. The ultraviolet sterilization layer inactivates bacteria and viruses in the water, while the inner filter mesh skeleton ensures stable water flow during the sterilization process, ensuring that the water quality fully meets the standards. The purified water, after multiple filtrations, finally flows into the purification sedimentation tank and is discharged from the equipment through the overflow pipe 103.

[0071] Example 3: Based on Example 2, this example adds a dynamic filtration structure to the filter component. Driven by the second motor 401, the filter component rotates while reciprocating axially, forming a composite motion trajectory, which solves the problem of easy clogging of the filter component.

[0072] In the specific implementation process, such as Figure 7 and Figure 9 As shown, a first turntable 303 is fixedly mounted on the left end of the filter assembly, and a sliding shaft 302 is fixedly mounted in the middle of the first turntable 303. A pair of hollow shafts 300 are rotatably inserted into the bottom of the left side wall of the open box 100. Each sliding shaft 302 is slidably inserted into the corresponding hollow shaft 300. A pair of limiting slots are opened on the inner ring surface of the hollow shaft 300, and a pair of limiting protrusions are fixed on the outer surface of the sliding shaft 302. Each limiting protrusion is slidably engaged in the corresponding limiting slot. The sliding shaft 302 achieves a combined rotation and axial sliding motion through the cooperation of the limiting protrusions and the limiting slots of the hollow shaft 300. The hollow shaft 300 is used to support the sliding shaft 302 and transmit torque, and its limiting slots ensure the synchronous rotation of the sliding shaft 302.

[0073] A second turntable 304 is fixedly installed at the right end of the filter assembly. A through-distributed flow guide cylinder 305 is fixedly installed in the middle of the second turntable 304. A pair of flow guide holes are opened at the two corners of the bottom of the fixed side plate 108. Each flow guide cylinder 305 is slidably inserted into the corresponding flow guide hole. The flow guide cylinder 305 and the flow guide hole are used to guide the axial movement trajectory of the filter assembly and ensure the stability of the movement.

[0074] An L-shaped connecting plate 408 is fixedly provided at the bottom of the left side wall of the open box 100. A vertically distributed rectangular connecting plate 411 is fixedly provided at the top of the L-shaped connecting plate 408. A pair of rectangular sliding holes are provided at both ends of the rectangular connecting plate 411. A rectangular sliding plate 412 is slidably inserted into the interior of each rectangular sliding hole. A rectangular sleeve 414 is fixedly provided at the right end of each rectangular sliding plate 412. The L-shaped connecting plate 408 and the rectangular connecting plate 411 are used to construct a support frame to fix components such as the second motor 401.

[0075] Each sliding shaft 302 has a rotating head 415 fixedly mounted on its left end. Each rotating head 415 is rotatably engaged in the corresponding rectangular sleeve 414. Each hollow shaft 300 has a fixed gear 301 concentrically fixed on its left end, and a pair of fixed gears 301 are meshed together. The rotating head 415 is used to realize the rotatable connection between the rectangular sleeve 414 and the sliding shaft 302, allowing relative rotation. The fixed gears 301 enable a pair of filter components to rotate in opposite directions, enhancing the filtration effect.

[0076] A fixed lug 409 is fixedly provided in the middle of the left side wall of the L-shaped connecting plate 408. A double-headed swing arm 410 is hinged to the outer end of the fixed lug 409. The rear half of the double-headed swing arm 410 is thickened, and elliptical pin holes are provided at both the front and rear ends of the double-headed swing arm 410. A limiting pin 413 is fixedly provided at the left end of each rectangular slide plate 412. Each limiting pin 413 is slidably inserted into the corresponding elliptical pin hole. The double-headed swing arm 410 cooperates with the limiting pin 413 through the elliptical pin hole to convert the circular motion into reciprocating oscillation. The rectangular slide plate 412 and the rectangular sleeve 414 are used to convert the oscillation of the double-headed swing arm 410 into linear reciprocating motion.

[0077] A fixed horizontal plate 400 is fixedly installed at the bottom of the left side wall of the open box 100. A second through hole is opened at the left end of the fixed horizontal plate 400. A second motor 401 is fixedly installed inside the second through hole. A fixed turntable 402 is fixedly installed at the end of the motor shaft of the second motor 401. An eccentric pin 403 is fixedly installed on the top surface of the fixed turntable 402. The top end of the eccentric pin 403 is slidably inserted into the corresponding elliptical pin hole. The eccentric pin 403 is a key component for power conversion and drives the double-headed swing arm 410 to swing.

[0078] A linkage shaft 404 is rotatably inserted into the right side of the top surface of the fixed horizontal plate 400. A first bevel gear 406 is concentrically fixed at the top end of the linkage shaft 404. The left end of a hollow shaft 300 extends to the left and is fitted with a second bevel gear 407 concentrically fixed. The first bevel gear 406 and the second bevel gear 407 are meshed and connected. The first bevel gear 406 and the second bevel gear 407 are used to change the transmission direction and transmit the power of the linkage shaft 404 to the hollow shaft 300.

[0079] A large-diameter pulley is concentrically fixed on the outer ring surface of the fixed turntable 402, and a small-diameter pulley is fitted in the middle of the linkage shaft 404. The small-diameter pulley is connected to the large-diameter pulley through the drive belt 405. The drive belt 405 can realize the power transmission between the large-diameter pulley and the small-diameter pulley and increase the rotational speed.

[0080] The working principle of this embodiment is as follows: After the second motor 401 is started, its motor shaft drives the fixed turntable 402 and the large-diameter pulley to rotate synchronously. The large-diameter pulley drives the small-diameter pulley through the drive belt 405, which in turn drives the linkage shaft 404 and the first bevel gear 406 to rotate. The meshing of the first bevel gear 406 and the second bevel gear 407 causes the hollow shaft 300 on the corresponding side to start rotating. Through the linkage of the fixed gear 301, the hollow shaft 300 on the other side is driven to rotate in the opposite direction. At this time, the sliding shaft 302 rotates synchronously with the hollow shaft 300 under the cooperation of the limiting protrusion and the limiting slot, thereby driving the first turntable 303, the filter assembly, the second turntable 304 and the guide slide 305 to rotate in opposite directions.

[0081] Meanwhile, during rotation, the eccentric pin 403 on the fixed turntable 402, through its limiting action with the elliptical pin hole on the double-headed swing arm 410, forces the double-headed swing arm 410 to reciprocate around the fixed lug 409. The elliptical pin hole on the double-headed swing arm 410 cooperates with the limiting pin 413 on the rectangular slide plate 412, converting the swing into reciprocating sliding of the rectangular slide plate 412 within the rectangular sliding hole. This sliding is transmitted to the sliding shaft 302 through the rotational connection between the rectangular sleeve 414 and the rotating head 415, causing it to reciprocate axially within the hollow shaft 300. Ultimately, the reciprocating sliding of the guide slide cylinder 305 within the guide slide hole realizes that the filter assembly performs axial reciprocating motion while rotating, forming a dynamic filtration process.

[0082] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A small-scale integrated wastewater treatment plant suitable for rural areas, characterized in that: The utility model provides an open box (100), the left side wall of open box (100) is equipped with extrusion through -hole (102), the left side wall of open box (100) is equipped with inclined plate (104) and is distributed to the rear lower side, the right side wall of open box (100) is equipped with overflow pipe (103) and is distributed through, the bottom of open box (100) is equipped with a plurality of equidistance distribution trapezoidal support leg (101) and is distributed to the front and rear, The utility model provides an open box (100), the left side wall of open box (100) is equipped with extrusion through -hole (102), the left side wall of open box (100) is equipped with inclined plate (104) and is distributed to the rear lower side, the right side wall of open box (100) is equipped with overflow pipe (103) and is distributed through, the bottom of open box (100) is equipped with a plurality of equidistance distribution trapezoidal support leg (101) and is distributed to the front and rear, The utility model provides an open box (100), the left side wall of open box (100) is equipped with extrusion through -hole (102), the left side wall of open box (100) is equipped with inclined plate (104) and is distributed to the rear lower side, the right side wall of open box (100) is equipped with overflow pipe (103) and is distributed through, the bottom of open box (100) is equipped with a plurality of equidistance distribution trapezoidal support leg (101) and is distributed to the front and rear, The left end of filter assembly is equipped with first turntable (303), the middle part of first turntable (303) is equipped with sliding shaft (302), the bottom of left side wall of open box (100) is rotatably inserted with a pair of hollow shafts (300) and is distributed through, each sliding shaft (302) is slidably inserted in the corresponding hollow shaft (300), a pair of limit clamping grooves are formed in the inner ring surface of hollow shaft (300), a pair of limit protrusions are formed on the outer surface of sliding shaft (302), and each limit protrusion is slidably clamped in the corresponding limit clamping groove, The right end of filter assembly is equipped with second turntable (304), the middle part of second turntable (304) is equipped with through -distribution flow guide sliding cylinder (305), a pair of flow guide sliding holes are formed in the bottom of two corners of fixed side plate (108), and each flow guide sliding cylinder (305) is slidably inserted in the corresponding flow guide sliding hole, The bottom of left side wall of open box (100) is equipped with L-shaped connecting plate (408), the top of L-shaped connecting plate (408) is equipped with vertically -distributed rectangular connecting plate (411), a pair of rectangular sliding holes are formed in the both ends of rectangular connecting plate (411), a rectangular sliding plate (412) is slidably inserted in each rectangular sliding hole, and a rectangular sleeve (414) is formed on the right end of each rectangular sliding plate (412). The left end of each sliding shaft (302) is fixedly provided with a rotating head (415), each rotating head (415) is rotationally clamped in a corresponding rectangular sleeve (414), the left end of each hollow shaft (300) is sleeved with a fixed gear (301) fixedly connected in a concentric manner, and a pair of fixed gears (301) are meshedly connected; The middle part of the left side wall of the L-shaped connecting plate (408) is fixedly provided with a fixed lug (409), the outer end of the fixed lug (409) is hingedly provided with a double-end swing arm (410), the rear half of the double-end swing arm (410) is thickened, and the front and rear ends of the double-end swing arm (410) are both provided with an oval pin hole, the left end of each rectangular sliding plate (412) is fixedly provided with a limiting pin shaft (413), and each limiting pin shaft (413) is slidingly inserted into the corresponding oval pin hole; The bottom of the left side wall of the open box (100) is fixedly provided with a fixed transverse plate (400), the left end of the fixed transverse plate (400) is provided with a second through hole, the inside of the second through hole is fixedly provided with a second motor (401), the motor shaft end of the second motor (401) is fixedly provided with a fixed rotating disc (402), the top surface of the fixed rotating disc (402) is fixedly provided with an eccentric pin shaft (403), and the top end of the eccentric pin shaft (403) is slidingly inserted into the corresponding oval pin hole; The top right side of the top surface of the fixed transverse plate (400) is rotationally inserted with a linkage shaft (404), the top end of the linkage shaft (404) is sleeved with a first bevel gear (406) fixedly connected in a concentric manner, the left end of one of the hollow shafts (300) is extended to the left and sleeved with a second bevel gear (407) fixedly connected in a concentric manner, and the first bevel gear (406) is meshedly connected with the second bevel gear (407). The outer ring surface of the fixed rotating disc (402) is sleeved with a large-diameter pulley fixedly connected in a concentric manner, the middle part of the linkage shaft (404) is sleeved with a small-diameter pulley, and the small-diameter pulley is in transmission connection with the large-diameter pulley through a driving belt (405).

2. The small integrated wastewater treatment plant suitable for rural areas according to claim 1, characterized in that: The right side wall of the inner side plate (106) is fixedly provided with a hollow clamping ring (107), the hollow clamping ring (107) is in through distribution with the circular through hole, the outer ring surface of the hollow rotating drum (200) is sleeved with an annular clamping rail (217) fixedly connected in a concentric manner, and the outer ring surface of the annular clamping rail (217) is rotationally clamped in the hollow clamping ring (107); One side of the intersection position of the open box (100) and the inner side plate (106) is fixedly provided with a fixed plate (111) at the top, the middle part of the fixed plate (111) is fixedly provided with a through-distributed inverted conical hopper (112), a plurality of uniformly distributed water filtering holes are formed in the semicircular sieve plate (105), a plurality of uniformly distributed water leakage holes are formed in the outer surface of the conical rotating drum (201), and the inner diameters of the water filtering holes and the water leakage holes are the same. The left end of each sliding shaft (302) is fixedly provided with a rotating head (415), each rotating head (415) is rotationally clamped in a corresponding rectangular sleeve (414), the left end of each hollow shaft (300) is sleeved with a fixed gear (301) fixedly connected in a concentric manner, and a pair of fixed gears (301) are meshedly connected; The middle part of the left side wall of the L-shaped connecting plate (408) is fixedly provided with a fixed lug (409), the outer end of the fixed lug (409) is hingedly provided with a double-end swing arm (410), the rear half of the double-end swing arm (410) is thickened, and the front and rear ends of the double-end swing arm (410) are both provided with an oval pin hole, the left end of each rectangular sliding plate (412) is fixedly provided with a limiting pin shaft (413), and each limiting pin shaft (413) is slidingly inserted into the corresponding oval pin hole; The bottom of the left side wall of the open box (100) is fixedly provided with a fixed transverse plate (400), the left end of the fixed transverse plate (400) is provided with a second through hole, the inside of the second through hole is fixedly provided with a second motor (401), the motor shaft end of the second motor (401) is fixedly provided with a fixed rotating disc (402), the top surface of the fixed rotating disc (402) is fixedly provided with an eccentric pin shaft (403), and the top end of the eccentric pin shaft (403) is slidingly inserted into the corresponding oval pin hole; The top right side of the top surface of the fixed transverse plate (400) is rotationally inserted with a linkage shaft (404), the top end of the linkage shaft (404) is sleeved with a first bevel gear (406) fixedly connected in a concentric manner, the left end of one of the hollow shafts (300) is extended to the left and sleeved with a second bevel gear (407) fixedly connected in a concentric manner, and the first bevel gear (406) is meshedly connected with the second bevel gear (407). The outer ring surface of the fixed rotating disc (402) is sleeved with a large-diameter pulley fixedly connected in a concentric manner, the middle part of the linkage shaft (404) is sleeved with a small-diameter pulley, and the small-diameter pulley is in transmission connection with the large-diameter pulley through a driving belt (405). The right side wall of the inner side plate (106) is fixedly provided with a hollow clamping ring (107), the hollow clamping ring (107) is in through distribution with the circular through hole, the outer ring surface of the hollow rotating drum (200) is sleeved with an annular clamping rail (217) fixedly connected in a concentric manner, and the outer ring surface of the annular clamping rail (217) is rotationally clamped in the hollow clamping ring (107); One side of the intersection position of the open box (100) and the inner side plate (106) is fixedly provided with a fixed plate (111) at the top, the middle part of the fixed plate (111) is fixedly provided with a through-distributed inverted conical hopper (112), a plurality of uniformly distributed water filtering holes are formed in the semicircular sieve plate (105), a plurality of uniformly distributed water leakage holes are formed in the outer surface of the conical rotating drum (201), and the inner diameters of the water filtering holes and the water leakage holes are the same.

3. The small integrated sewage treatment equipment suitable for rural areas according to claim 1 or 2, characterized in that: The left side wall of the open box (100) is fixedly provided with a three-jaw support (109), the middle part of the three-jaw support (109) is fixedly provided with a fixing ring (110), the middle part of the fixing ring (110) is rotatably inserted with a fixing shaft (203), the right end of the fixing shaft (203) penetrates through the extrusion through hole (102) and is coaxially fixedly connected with the left end of the conical rotating cylinder (201); The middle segment of the fixing shaft (203) is sleeved with a concentrically fixed fixing sleeve (205), the left end of the fixing sleeve (205) is sleeved with a concentrically fixed fixing block ring (204), the right end of the fixing sleeve (205) is sleeved with an extrusion block ring (206), the middle segment of the fixing sleeve (205) is sleeved with a tension spring (207), the two ends of the tension spring (207) are fixedly connected with the fixing block ring (204) and the extrusion block ring (206) respectively, and the extrusion block ring (206) abuts against the outside of the extrusion through hole (102).

4. The small integrated wastewater treatment plant suitable for rural areas according to claim 1, characterized in that: The top surface of the inner side plate (106) is fixedly provided with a fixed vertical plate (208), the right side surface bottom of the fixed vertical plate (208) is fixedly provided with an L-shaped connecting rod (209), the top end of the L-shaped connecting rod (209) is rotatably inserted with a reciprocating shaft (214), the right end of the reciprocating shaft (214) is sleeved with a small-diameter chain wheel which is concentrically fixed, the right end of the hollow rotating cylinder (200) is sleeved with a large-diameter chain wheel which is concentrically fixed, and the small-diameter chain wheel is meshingly and drivingly connected with the large-diameter chain wheel through a driving chain belt (216).

5. The small integrated wastewater treatment plant suitable for rural areas according to claim 4, characterized in that: The reciprocating mechanism comprises a notched gear ring (212), a notched gear (213) and a reciprocating gear (215), the top of the fixed vertical plate (208) is provided with a first through hole, the inside of the first through hole is fixedly provided with a first motor (210), the middle part of the motor shaft of the first motor (210) is fixedly provided with a three-jaw rotating disc (211), the three ends of the three-jaw rotating disc (211) are fixedly provided with concentrically distributed notched gear rings (212), and the end of the motor shaft of the first motor (210) is fixedly provided with a notched gear (213); The left end of the reciprocating shaft (214) is sleeved with a reciprocating gear (215) which is concentrically fixed, the reciprocating gear (215) is located between the notched gear (213) and the notched gear ring (212), and the notched gear (213) and the notched gear ring (212) are alternately meshingly connected with the reciprocating gear (215).

6. The small integrated wastewater treatment plant suitable for rural areas according to claim 1, characterized in that: The filter assembly comprises, from outside to inside, a metal grid layer (306), a medium-efficiency filter layer (307), an adsorption filter layer (308), a precision filter layer (309) and an auxiliary disinfection layer (310); the metal grid layer (306) is a mesh structure formed by longitudinally and transversely interweaving metal wires, has a wall thickness of 50-100 mm and a pore size of 5-10 mm; the medium-efficiency filter layer (307) is formed by alternately laying sand layers and filter cloths, has a wall thickness of 100-150 mm, the sand layers adopt fine quartz sand with a particle size of 0.5-2 mm, and the filter cloths adopt polyester fiber filter cloths with a pore size of 10-50 μm; The adsorbing filter layer (308) is mixed by activated carbon, zeolite and diatomite, and has a wall thickness of 80-120 mm; the precision filter layer (309) comprises, from outside to inside, a polypropylene film, a sintered activated carbon filter core and a hollow fiber membrane, has a wall thickness of 5-20 mm, and has a pore size of 0.1-1 μm for the polypropylene film and 0.01-0.1 μm for the hollow fiber membrane; and the auxiliary disinfection layer (310) comprises, from outside to inside, an ultraviolet sterilization layer and an inner filter screen skeleton, and has a wall thickness of 30-50 mm.

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