CN212269791U - Rural distributed garden type domestic sewage treatment system - Google Patents

Abstract

The utility model discloses a rural distributed garden type domestic sewage treatment system, relating to the technical field of rural sewage treatment, which is sequentially provided with an impurity removal device, a regulating tank and a nitration treatment device; a denitrification treatment tank, a sedimentation tank and a garden wetland tank; the edulcoration device includes the edulcoration box, and edulcoration box inner wall sets up sewage drainage fill through first bolt installation bracket in the middle part of the bracket, and sewage drainage fill below sets up the filter assembly, and the installation of filter assembly top sets up and cleans the subassembly, cleans the subassembly below and sets up the impurity and collects the box, and impurity collection box one side sets up clamping component. The utility model discloses it can carry out the edulcoration operation to rural domestic sewage in, clears up and collect with concentrating the waste residue impurity of sneaking into, effectively prevents to take place blocking phenomenon, and its operation management is convenient, and the working costs is low, can carry out nitration and denitrification to domestic sewage and handle to send rural domestic sewage and the mud that produces into garden wetland pond and carry out reuse.

Description

Rural distributed garden type domestic sewage treatment system

Technical Field

The utility model relates to a rural sewage treatment technical field specifically is a rural distributed garden formula sewage treatment system.

Background

In recent years, with the rapid development of rural economy and the continuous promotion of urbanization in China, the discharge amount of rural distributed domestic and aquaculture sewage is continuously increased, and the pollution to surrounding natural water bodies and soil is serious. Meanwhile, the dispersed sewage discharge in rural areas is becoming a main pollution source of drainage basins and increasingly becoming a main nitrogen and phosphorus source of downstream estuaries and lakes to cause water eutrophication. Therefore, effective treatment of rural sewage is becoming an urgent problem to be solved, the amount of domestic waste generated by economic growth is increasing, but environmental awareness, living habits and matched environmental protection facilities of rural residents are not followed up, rural domestic sewage is directly discharged into rivers, domestic garbage is directly discarded at the periphery of a courtyard or nearby ditches, pollution of domestic sewage and domestic garbage generated by rural life becomes an important source of rural area source pollution, and rural ecological environment is in a gradually worsening trend. Along with the increasing attention of people to the environment protection work and the urgent need of farmers for healthy life, the rural ecological environment protection work is raised to a very important height.

At present, the following problems exist in the process of treating domestic sewage generated in rural life: 1. a large amount of waste residue impurities such as plastic bags, stones, deadwood and the like are often mixed in the rural domestic sewage, and the filtration and separation operation is not carried out in the treatment process, so that the treatment effect of the post-process of the rural domestic sewage is greatly influenced; 2. the rural domestic sewage is separated and filtered by adopting the conventional grid or grid, so that the blocking phenomenon is often generated at the filtering position, and waste residue impurities mixed in the rural domestic sewage are not effectively cleaned and collected, so that the large-batch sewage treatment operation of the rural domestic sewage can not be met, the secondary pollution to the surrounding environment is easy to cause, and the healthy development of the rural ecological environment is not facilitated; 3. the existing sewage treatment system has high operating cost and complex management, and the high-investment sewage treatment mode meets the treatment requirement of cities on domestic sewage, but is difficult to popularize in vast rural areas in China, so that a stable and efficient ecological combined treatment system with low investment, low energy consumption, convenient operation and management and low operating cost is developed according to local conditions based on rural economic conditions and natural environment ecology, and is an important guarantee for realizing effective control of rural sewage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above problem, a rural distributed garden formula sewage treatment system is provided, it can carry out the edulcoration operation to rural domestic sewage in, the waste residue impurity that will sneak carries out effectual clearance and centralized collection, can effectively prevent to take place blocking phenomenon, its operation management is convenient, the working costs is low, can carry out nitration reaction and denitrification to domestic sewage effectively, and send into rural domestic sewage and the mud that produces and carry out reuse in the garden wetland pond.

In order to realize the above purpose, the utility model adopts the technical scheme that: a rural distributed garden type domestic sewage treatment system comprises an impurity removal device for removing impurities from rural sewage, the impurity removal device comprises an impurity removal box body, a partition plate is vertically and fixedly arranged in the impurity removal box body, the inner wall of the impurity removal box body is provided with a bracket through a first bolt, a sewage drainage hopper for intensively feeding the rural sewage is fixedly arranged in the middle of the bracket, two groups of filtering components for filtering the sewage are arranged below the sewage drainage hopper, cleaning components for removing filter residues are respectively arranged above the filtering components, an impurity collecting box is arranged below the cleaning components and on a supporting platform on the side wall of the partition plate, a clamping component for clamping the impurity collecting box is arranged on one side of the impurity collecting box, a first water pipeline is arranged at the bottom of the impurity removal box body and is connected with a first control valve, a second water pipeline is arranged at the other end of the first control valve and is communicated into, a third water pipeline is arranged in the regulating tank and connected to the input end of a first water pump, the output end of the first water pump is provided with a fourth water pipeline and connected to a nitration treatment device, the output end of the nitration treatment device is provided with a fifth water pipeline and connected to a second control valve, the other end of the second control valve is provided with a sixth water pipeline and connected to a denitrification treatment tank, the bottom of the denitrification treatment tank is provided with an aeration component, the inside of the denitrification treatment tank is provided with a seventh water pipeline and connected to the input end of the second water pump, the output end of the second water pump is provided with an eighth water pipeline and connected to a sedimentation tank, bent plate-shaped flow dividing clapboards are arranged in the sedimentation tank at intervals, a first sludge pipe is arranged between the flow dividing clapboards and at the bottom of the sedimentation tank and connected to the input end of a sludge pump, the output end of the sludge pump is provided with a second sludge pipe, the output end of the third water pump is provided with a tenth water pipeline and is connected into the garden wetland pond.

As the utility model discloses a further optimization, the filtering component includes that the level sets up the fixed boss in the edulcoration box, and fixed boss bottom is through the filter plate of third bolt installation rectangular plate shape, and the interval array is provided with the filtration pore in the filter plate, and the both sides parallel arrangement of filter plate upper surface has first blend stop, and the slope is provided with the second blend stop on the fixed boss, and the height setting such as second blend stop and first blend stop.

As the utility model discloses a further optimization, clean the subassembly and include that horizontal interval rotates the lead screw that sets up in the edulcoration box, the lead screw passes the scum outlet and stretches out the one end of edulcoration box lateral wall and be provided with driven pulley, driven pulley passes through the belt and cleans the drive pulley looks transmission connection on the motor output axle end, all be provided with the sprocket on parallel arrangement's the lead screw and pass through chain looks transmission connection, the lead screw other end rotates set up in the fixing base and be provided with the bearing between the fixing base, be provided with screw-nut on the lead screw, the screw-nut lower extreme is provided with the brush board through the installation of second bolt, brush board lower surface is provided with the stereoplasm brush and can sweeps the filter residue on the.

As the utility model discloses a further optimization, clamping component includes and is fixed in the support pedestal on the supporting platform through the fourth nut, supports the pedestal and goes up the level and run through and be provided with two sets of threaded rods, and the threaded rod is close to the one end of impurity collection box and be provided with splint, on the threaded rod and be provided with the spring in the splint side, the one end that splint were kept away from to the threaded rod is provided with the nut.

As the utility model discloses a further optimization, the articulated first dodge gate and the second dodge gate that is provided with on the rear end face lateral wall of edulcoration box.

As the utility model discloses a further optimization, nitration reaction processing apparatus includes the nitration tank of cavity tank structure form, nitration tank upper end is provided with input hole and fourth conduit looks UNICOM, nitration tank top installation is provided with agitator motor, agitator motor output shaft end and driving disc looks transmission are connected and can drive the stirring pivot and be rotary motion, be provided with the puddler in the stirring pivot, the tip is provided with delivery outlet and is linked together with fifth conduit under the nitration tank.

As the utility model discloses a further optimization, the aeration subassembly includes the aeration fan, and aeration fan output installation is provided with the aeration pipe who stretches into in the denitrification treatment pond, and the interval sets up the aeration dish on the aeration pipe.

As the utility model discloses a further optimization, garden wetland pond inside is provided with the wetland packing layer, plants on the wetland packing layer and is provided with the wetland plant, and the wetland packing layer adopts high-efficient phosphorus-accumulating packing layer, and the wetland plant adopts one or more in lotus flower, reed, cattail, water shallot, arundo donax, garden wetland bottom of the pool portion is provided with the third control valve on drain pipe and the drain pipe.

The utility model has the advantages that: the utility model provides a rural distributed garden formula sewage treatment system, it can carry out the edulcoration operation to rural domestic sewage in, the waste residue impurity that will sneak carries out effectual clearance and collects with concentrating, can effectively prevent to take place blocking phenomenon, its operation management is convenient, the working costs is low, can carry out nitration reaction and denitrification to domestic sewage effectively to send into rural domestic sewage and the mud that produces and carry out reuse in the garden wetland pond.

1. The utility model discloses in be provided with filtering component, can realize carrying out the separation operation with the waste residue impurity among the rural domestic sewage fast, rural domestic sewage is fought position department from the sewage drainage and is concentrated the entering, carries out the filtering separation operation in filter plate position department, and the second blend stop plays the effect that blocks the filter residue and break away from the filter plate both sides with first blend stop, and the filter plate adopts the design of components of a whole that can function independently combination formula with the edulcoration box to better realization is to installation, maintenance and the change operation of filter plate.

2. The utility model discloses in be provided with and clean the subassembly, clean the subassembly and be favorable to realizing cleaning the operation with the filter residue that separates on the filter plate, the drive cleans the motor, drives the lead screw and is rotary motion, and screw-nut drives the brush board and is linear motion on the filter plate, and the stereoplasm brush that brush board lower surface set up can clean the operation with the filter residue on the filter plate, and the filter residue is from slag notch department through and fall into in the impurity collection box.

3. The utility model discloses in be provided with clamping unit, clamping unit is favorable to realizing collecting the box with impurity and stably sets up on supporting platform, and splint provide pressure of impurity collection box lateral wall under the spring action of spring, make impurity collect the box and can place steadily on supporting platform, when needs take out impurity collection box, the staff is towards the direction pulling threaded rod of keeping away from impurity collection box to can realize collecting the box with impurity and take out from supporting platform.

4. The utility model discloses in be provided with the garden wetland pond, the garden wetland pond is favorable to making rural domestic sewage obtain further utilization, garden wetland pond inside is provided with the wetland packing layer, plant on the wetland packing layer and be provided with the wetland plant, the wetland packing layer adopts high-efficient phosphorus-accumulating packing layer, the wetland plant adopts lotus, reed, cattail, water shallot, arundo donax, one kind or multiple in the calamus, absorption and ecological purification effect through wetland plant root system, can be to the mud that produces among the rural domestic sewage in the processing procedure, the further effective utilization of sewage.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is the main view structure diagram of the impurity removing device of the utility model.

Fig. 3 is a front view of the components on the right side of the first control valve in fig. 1.

Fig. 4 is a schematic sectional view at a-a in fig. 2.

Fig. 5 is a schematic view of the structure of the position of the impurity collecting box of the present invention.

The text labels in the figures are represented as: 1. an impurity removal device; 2. a sweeping assembly; 3. a filter assembly; 4. an impurity collection box; 5. a clamping assembly; 6. a first control valve; 7. a regulating tank; 8. a first water pump; 9. a nitration reaction treatment device; 10. a second control valve; 11. a denitrification treatment tank; 12. an aeration assembly; 13. a second water pump; 14. a sedimentation tank; 15. a sludge pump; 16. a third water pump; 17. a garden wetland pool; 18. a third control valve; 101. a sewage drainage hopper; 102. an impurity removal box body; 103. a bracket; 104. a first bolt; 105. a slag discharge port; 106. a partition plate; 107. a support platform; 108. a first movable door; 109. a second movable door; 201. a fixed seat; 202. a bearing; 203. a screw rod; 204. a feed screw nut; 205. a second bolt; 206. a brush plate; 207. cleaning a motor; 208. a drive pulley; 209. a belt; 210. a driven pulley; 211. a sprocket; 212. a chain; 301. a first barrier strip; 302. filtering the plate; 303. filtering holes; 304. a third bolt; 305. a second barrier strip; 306. fixing the boss; 501. a splint; 502. a spring; 503. a nut; 504. a threaded rod; 505. a support base; 506. a fourth nut; 601. a first water delivery pipeline; 602. a second water delivery pipeline; 801. a third water delivery pipeline; 802. a fourth water delivery pipeline; 901. a stirring motor; 902. a drive plate; 903. a nitration reaction tank; 904. an input aperture; 905. a stirring rotating shaft; 906. a stirring rod; 907. an output aperture; 1001. a fifth water conveying pipeline; 1002. a sixth water conveying pipeline; 1201. an aeration fan; 1202. an aeration pipe; 1203. an aeration disc; 1301. a seventh water delivery pipeline; 1302. an eighth water conveying pipeline; 1401. a flow dividing partition plate; 1501. a first sludge pipe; 1502. a second sludge pipe; 1601. a ninth water delivery pipeline; 1602. a tenth water conduit; 1701. wetland plants; 1702. a wetland packing layer; 1801. and a water discharge pipe.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

As shown in fig. 1-5, the specific structure of the present invention is: the device comprises an impurity removing device 1 for removing impurities from rural sewage, wherein the impurity removing device 1 comprises an impurity removing box body 102, a partition plate 106 is vertically and fixedly arranged in the impurity removing box body 102, a bracket 103 is arranged on the inner wall of the impurity removing box body 102 through a first bolt 104, a sewage diversion hopper 101 for intensively feeding the rural sewage is fixedly arranged in the middle of the bracket 103, two groups of filtering components 3 for filtering the sewage are arranged below the sewage diversion hopper 101, cleaning components 2 for removing filter residues are arranged above the filtering components 3, an impurity collecting box 4 is arranged below the cleaning components 2 and on a supporting platform 107 on the side wall of the partition plate 106, a clamping component 5 for clamping the impurity collecting box 4 is arranged on one side of the impurity collecting box 4, a first water pipeline 601 is arranged at the bottom of the impurity removing box body 102 and connected with a first control valve 6, a second water pipeline 602 is arranged at the other end of the first control valve 6 and communicated into an, a third water pipe 801 is arranged inside the adjusting tank 7 and connected to the input end of a first water pump 8, the output end of the first water pump 8 is provided with a fourth water pipe 802 and connected to a nitration treatment device 9, the output end of the nitration treatment device 9 is provided with a fifth water pipe 1001 and connected to a second control valve 10, the other end of the second control valve 10 is provided with a sixth water pipe 1002 and connected to the inside of a denitrification treatment tank 11, the bottom of the denitrification treatment tank 11 is provided with an aeration component 12, the inside of the denitrification treatment tank 11 is provided with a seventh water pipe 1301 and connected to the input end of a second water pump 13, the output end of the second water pump 13 is provided with an eighth water pipe 1302 and connected to a sedimentation tank 14, bent plate-shaped flow dividing clapboards 1401 are arranged in the sedimentation tank 14 at intervals, a first sludge pipe 1501 is arranged between the flow dividing clapboards 1401 and at the bottom of the sedimentation tank 14 and connected to the input end of a sludge pump 15, the output end, a ninth water pipeline 1601 is arranged in the sedimentation tank 14 and is connected to the input end of the third water pump 16, and the output end of the third water pump 16 is provided with a tenth water pipeline 1602 and is connected to the garden wetland tank 17.

Referring to fig. 2 and 4, in order to facilitate the separation of waste residues and impurities in rural domestic sewage, the filter assembly 3 includes a fixing boss 306 horizontally disposed in the impurity removal tank 102, a rectangular plate-shaped filter plate 302 is mounted at the bottom of the fixing boss 306 through a third bolt 304, filter holes 303 are arranged in the filter plate 302 at intervals in an array manner, first barrier strips 301 are arranged in parallel on two sides of the upper surface of the filter plate 302, second barrier strips 305 are obliquely arranged on the fixing boss 306, the second barrier strips 305 are arranged at equal height to the first barrier strips 301, rural domestic sewage enters from the sewage guide hopper 101, the filtration and separation operations are performed at the position of the filter plate 302, the second barrier strips 305 and the first barrier strips 301 play a role in blocking filter residues from being separated from two sides of the filter plate 302, the filter plate 302 and the impurity removal tank 102 adopt a split combined design, so as to better implement the mounting of the filter plate 302, Maintenance and replacement operations.

Referring to fig. 2 and 4, in order to facilitate the cleaning operation of the filter residues separated from the filter plates 302, the cleaning assembly 2 includes a screw rod 203 horizontally and horizontally spaced and rotatably disposed in the impurity removing box 102, a driven pulley 210 is disposed at one end of the screw rod 203, which passes through the residue discharge port 105 and extends out of the sidewall of the impurity removing box 102, the driven pulley 210 is in transmission connection with a driving pulley 208 at the output shaft end of the cleaning motor 207 through a belt 209, chain wheels 211 are disposed on the screw rods 203 which are arranged in parallel and are in transmission connection with each other through chains 212, a bearing 202 is disposed between the other end of the screw rod 203 and the fixed seat 201, a screw rod nut 204 is disposed on the screw rod 203, a brush plate 206 is mounted at the lower end of the screw rod nut 204 through a second bolt 205, a hard brush is disposed on the lower surface of the brush plate 206 and can sweep the filter residues on, the cleaning motor 207 is driven to drive the screw rod 203 to rotate, the screw rod nut 204 drives the brush plate 206 to linearly move on the filter plate 302, the hard brush arranged on the lower surface of the brush plate 206 can clean the filter residue on the filter plate 302, and the filter residue passes through the residue discharge port 105 and falls into the impurity collecting box 4.

Referring to fig. 5, in order to facilitate the stable installation of the impurity collecting box 4 on the supporting platform 107, the clamping assembly 5 includes a supporting seat 505 fixed on the supporting platform 107 by a fourth nut 506, two sets of threaded rods 504 horizontally penetrate through the supporting seat 505, and one end of the threaded rod 504 close to the impurity collecting box 4 is provided with a clamping plate 501, the threaded rod 504 is provided with a spring 502 at the side end of the clamping plate 501, one end of the threaded rod 504 far away from the clamping plate 501 is provided with a nut 503, the clamping plate 501 provides pressure for the side wall of the impurity collecting box 4 under the elastic force action of the spring 502, so that the impurity collecting box 4 can be stably placed on the supporting platform 107, when it is necessary to take out the impurity collecting box 4, the worker pulls the threaded rod 504 in a direction away from the impurity collecting box 4, thereby enabling the impurity collecting box 4 to be taken out from the supporting platform 107.

Referring to fig. 4, in order to facilitate the installation, maintenance and replacement of each component in the impurity removing box 102 and further facilitate the removal of the impurity collecting box 4 from the impurity removing box 102, a first movable door 108 and a second movable door 109 are hinged to the outer side wall of the rear end surface of the impurity removing box 102.

Referring to fig. 1 and 3, in order to facilitate the domestic sewage to perform nitrification operation in the nitrification treatment apparatus 9, the nitrification treatment apparatus 9 includes a nitrification reactor 903 having a hollow tank structure, an input hole 904 is formed at an upper end of the nitrification reactor 903, the input hole 904 is communicated with a fourth water pipe 802, a stirring motor 901 is installed at a top of the nitrification reactor 903, an output shaft end of the stirring motor 901 is in transmission connection with a transmission disc 902 and can drive a stirring rotating shaft 905 to rotate, a stirring rod 906 is arranged on the stirring rotating shaft 905, an output hole 907 is formed at a lower end of the nitrification reactor 903 and is communicated with a fifth water pipe 1001, and nitrifying microorganisms are arranged in the nitrification reactor 903 and are used for oxidizing ammonia nitrogen in the sewage into nitrate nitrogen or nitrite nitrogen.

Referring to fig. 1 and 3, in order to facilitate the domestic sewage to carry out nitrification reaction in the denitrification treatment tank 11, the aeration assembly 12 includes an aeration fan 1201, an output end of the aeration fan 1201 is provided with an aeration pipe 1202 extending into the denitrification treatment tank 11, aeration discs 1203 are arranged on the aeration pipe 1202 at intervals, denitrification microorganisms are arranged in the denitrification treatment tank 11 and carbon sources are added, so that nitrate nitrogen or nitrite nitrogen in the sewage is subjected to denitrification reaction in the presence of the carbon sources.

Referring to fig. 1 and 3, in order to facilitate further utilization of rural domestic sewage, a wetland filler layer 1702 is arranged inside the garden wetland pool 17, wetland plants 1701 are planted on the wetland filler layer 1702, the wetland filler layer 1702 adopts a high-efficiency phosphorus-accumulating filler layer, the wetland plants 1701 adopt one or more of lotus, reed, cattail, allium mongolicum regel, arum donax and calamus, a drain pipe 1801 is arranged at the bottom of the garden wetland pool 17, and a third control valve 18 is arranged on the drain pipe 1801.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims (8)

1. A rural distributed garden type domestic sewage treatment system is characterized by comprising an impurity removal device (1) for removing impurities from rural sewage, wherein the impurity removal device (1) comprises an impurity removal box body (102), a partition plate (106) is vertically and fixedly arranged in the impurity removal box body (102), a bracket (103) is installed on the inner wall of the impurity removal box body (102) through a first bolt (104), a sewage drainage hopper (101) for intensively feeding the rural sewage is fixedly arranged in the middle of the bracket (103), two groups of filtering components (3) for filtering the sewage are arranged below the sewage drainage hopper (101), cleaning components (2) for removing filter residues are respectively installed above the filtering components (3), impurity collection boxes (4) are arranged below the cleaning components (2) and on supporting platforms (107) on the side wall of the partition plate (106), and clamping components (5) for clamping the impurity collection boxes (4) are arranged on one side of the impurity collection boxes (4), the bottom of the impurity removal box body (102) is provided with a first water pipeline (601) and is connected with a first control valve (6), the other end of the first control valve (6) is provided with a second water pipeline (602) and is communicated into a regulating tank (7), a third water pipeline (801) is arranged inside the regulating tank (7) and is connected to the input end of a first water pump (8), the output end of the first water pump (8) is provided with a fourth water pipeline (802) and is connected to a nitration treatment device (9), the output end of the nitration treatment device (9) is provided with a fifth water pipeline (1001) and is connected to a second control valve (10), the other end of the second control valve (10) is provided with a sixth water pipeline (1002) and is connected to a denitrification treatment tank (11), the bottom of the denitrification treatment tank (11) is provided with an aeration component (12), a seventh water pipeline (1301) is arranged inside the denitrification treatment tank (11) and is connected to the input end of a second water pump (13), the output end of the second water pump (13) is provided with an eighth water pipeline (1302) and is connected to the sedimentation tank (14), bent plate-shaped shunting partition plates (1401) are arranged in the sedimentation tank (14) at intervals, a first sludge pipe (1501) is arranged between the shunting partition plates (1401) and at the bottom of the sedimentation tank (14) and is connected to the input end of a sludge pump (15), the output end of the sludge pump (15) is provided with a second sludge pipe (1502) and is connected to the interior of the garden wetland tank (17), a ninth water pipeline (1601) is arranged in the sedimentation tank (14) and is connected to the input end of a third water pump (16), and the output end of the third water pump (16) is provided with a tenth water pipeline (1602) and is connected to the interior of the garden wetland tank (17.

2. The rural distributed garden type domestic sewage treatment system according to claim 1, wherein the filtering assembly (3) comprises a fixing boss (306) horizontally arranged in the impurity removing tank body (102), a rectangular plate-shaped filtering plate (302) is mounted at the bottom of the fixing boss (306) through a third bolt (304), filtering holes (303) are formed in the filtering plate (302) at intervals in an array manner, first barrier strips (301) are arranged on two sides of the upper surface of the filtering plate (302) in parallel, second barrier strips (305) are obliquely arranged on the fixing boss (306), and the second barrier strips (305) are arranged at the same height as the first barrier strips (301).

3. The rural distributed garden type domestic sewage treatment system according to claim 1, wherein the cleaning assembly (2) comprises a screw rod (203) which is transversely and horizontally arranged in the impurity removing box body (102) in a rotating manner at a certain interval, one end of the screw rod (203) which passes through the slag discharge port (105) and extends out of the side wall of the impurity removing box body (102) is provided with a driven pulley (210), the driven pulley (210) is in transmission connection with a driving pulley (208) on the output shaft end of the cleaning motor (207) through a belt (209), the parallel screw rods (203) are respectively provided with a chain wheel (211) and are in transmission connection through a chain (212), the other end of the screw rod (203) is rotatably arranged in the fixing seat (201) and is provided with a bearing (202) between the screw rod (203), the screw rod nut (204) is arranged on the screw rod (203), the lower end of the screw rod nut (204) is provided with a hairbrush plate (206), the lower surface of the brush plate (206) is provided with a hard brush and can sweep filter residues on the filter assembly (3) into the impurity collecting box (4).

4. The rural decentralized garden-type domestic sewage treatment system according to claim 1, wherein the clamping assembly (5) comprises a support base body (505) fixed on the support platform (107) through a fourth nut (506), two sets of threaded rods (504) are horizontally arranged on the support base body (505) in a penetrating manner, a clamping plate (501) is arranged at one end of each threaded rod (504) close to the impurity collecting box (4), a spring (502) is arranged on each threaded rod (504) and at the side end of each clamping plate (501), and a nut (503) is arranged at the end of each threaded rod (504) far away from each clamping plate (501).

5. The rural decentralized garden-type domestic sewage treatment system according to claim 1, wherein a first movable door (108) and a second movable door (109) are hinged on the outer side wall of the rear end face of the impurity removing box body (102).

6. The rural distributed garden type domestic sewage treatment system according to claim 1, wherein the nitrification reaction treatment device (9) comprises a nitrification reaction tank (903) having a cavity tank structure, an input hole (904) is formed in the upper end of the nitrification reaction tank (903), the input hole (904) is communicated with a fourth water pipeline (802), a stirring motor (901) is installed at the top of the nitrification reaction tank (903), the output shaft end of the stirring motor (901) is in transmission connection with a transmission disc (902) and can drive a stirring rotating shaft (905) to rotate, a stirring rod (906) is arranged on the stirring rotating shaft (905), an output hole (907) is formed in the lower end of the nitrification reaction tank (903), and the output hole (907) is communicated with a fifth water pipeline (1001).

7. The rural distributed garden type domestic sewage treatment system according to claim 1, wherein the aeration assembly (12) comprises an aeration fan (1201), an aeration pipe (1202) extending into the denitrification treatment tank (11) is installed at the output end of the aeration fan (1201), and aeration discs (1203) are arranged on the aeration pipe (1202) at intervals.

8. The rural distributed garden type domestic sewage treatment system according to claim 1, wherein a wetland filler layer (1702) is arranged inside the garden wetland pool (17), wetland plants (1701) are planted on the wetland filler layer (1702), the wetland filler layer (1702) adopts a high-efficiency phosphorus-accumulating filler layer, the wetland plants (1701) adopt one or more of lotus flowers, reeds, cattail, allium fistulosum, arundo donax and calamus, a drain pipe (1801) is arranged at the bottom of the garden wetland pool (17), and a third control valve (18) is arranged on the drain pipe (1801).

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