CN110368727A - A kind of full-automatic accurate filter - Google Patents

Abstract

The invention discloses an automatic precision filter, belonging to the technical field of precision filter equipment, comprising a sewage containment device, a positioning air supply device, a positioning feeding device, a sewage purification device and a control device. The sewage purification device includes a sewage filtering component , Carrying water inlet part, purification backflushing part, filtrate discharge part and filter residue discharge part, the carrying water inlet part is arranged below the sewage holding device and communicates with the carrying water inlet part, and the purification backflushing part is arranged in the sewage holding device The side wall of the device is connected to and connected to the side wall of the device. The inlet end of the purification and blowback part is connected to the positioning air supply device. The discharge ends of the filtrate discharge part and the filter residue discharge part are connected to the sewage holding device. The process is fully automated, reducing the number of operators, and the operation is simple and convenient. Equipment cost and operating cost are low, maintenance and maintenance are very convenient, and ideal economic benefits are achieved.

Description

A fully automatic precision filter

technical field

The invention relates to the technical field of precision filtering equipment, in particular to a fully automatic precision filter.

Background technique

This application is a precision filtration equipment designed by absorbing the advanced technology of similar products at home and abroad and combining with the production requirements of our country. It has a wide range of applications in environmental protection, fine chemicals, pharmaceuticals, food, petroleum, metallurgy and other industries.

The sewage filter in the prior art, first, will have odor leakage, and the airtightness is not high; second, it is impossible to completely recover the filtering residue and residual liquid, which will cause environmental pollution; third, traditional and existing After the filter material reaches its service life, it can only be replaced with a new filter material. Fourth, the existing sewage filter needs to be manually operated throughout the operation process, which will result in high equipment costs and operating costs. , maintenance and maintenance are very complicated.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fully automatic precision filter to solve the technical problems in the prior art.

A fully automatic precision filter provided by the present invention includes a sewage holding device, a positioning air supply device, a positioning feeding device, a sewage purification device and a control device. The positioning air supply device, the positioning feeding device and the sewage purification device are all It is electrically connected with the control device, the positioning air supply device and the positioning feeding device are both arranged on the side of the sewage holding device and communicate with the sewage holding device. The sewage purification device includes a sewage filtering part, a bearing water inlet part, a A backflushing part, a filtrate discharge part and a filter residue discharge part, the sewage filtering part is arranged in the sewage holding device; The components are arranged on the side wall of the sewage holding device and communicate with it, the inlet end of the purifying backflushing component is connected with the positioning air supply device, and the discharge ends of the filtrate discharge component and the filter residue discharge component are both connected with the sewage holding device.

Further, the control device includes a remote control system, a positioning controller and a number of liquid level sensing instruments, the remote control system is installed in an area where the operator can operate, and the positioning controller is connected with the sewage filter component and the water inlet component. , The purification backflushing part, the filtrate discharge part and the filter residue discharge part are electrically connected, and several of the liquid level sensing instruments are electrically connected with the positioning controller.

Further, the sewage accommodating device includes a sewage accommodating tank, a positioning and locking part and a positioning and capping part, the sewage accommodating tank is a cylindrical hollow structure, and the positioning and fastening part and the positioning and sealing part are respectively arranged in the sewage accommodating tank. On both sides of the tank, the positioning and buckling components include a buckling cover, a first cover-opening cylinder and a first hinge plate. The tight cover is integrally formed, the end of the telescopic rod of the first cover opening cylinder is fixedly connected with one end of the first hinge plate, the tail end of the first cover opening cylinder is hinged with the side wall of the sewage holding tank, and the positioning seal is The cover part includes a second cover opening cylinder and a second hinge plate, the end of the telescopic rod of the second cover opening cylinder is hinged with the side wall of the second hinge plate, and the rear end of the second cover opening cylinder is connected to the sewage holding tank Hinged, in the buckling state, the second hinge plate locks and forms the buckling plate cover and the sewage holding tank.

Further, the sewage filter component includes a first filter assembly and a second filter assembly, the first filter assembly is disposed in the middle part of the sewage holding tank, the second filter assembly is disposed at the bottom of the sewage holding tank, the The first filter assembly includes positioning and mounting strips and a number of filter plates arranged at intervals, and several of the filter plates are sequentially installed at the bottom of the positioning and mounting plate, and the second filter assembly includes a filter mounting plate, a vertical positioning column and several groups of The sewage purification plate is arranged on the vertical positioning column at intervals, the filter installation plate is arranged at the bottom end in the sewage holding tank, and the vertical positioning column is installed on the filter installation plate.

Further, the bearing water inlet component includes a water inlet pipe, a positioning water pump, a control valve and a connecting pipe, the positioning water pump is arranged on the side of the sewage holding tank, one end of the water inlet pipe is connected with the positioning water pump, and the other end is connected with the positioning water pump. The water point to be connected is connected, one end of the connecting pipe is connected with the water outlet end of the positioning water pump, and the other end is connected with the sewage holding tank.

Further, the positioning air supply device includes an air compressor, an oil-water filter, an air storage tank, a number of air supply pipes, a number of air supply manual ball valves and a number of air supply pressure valves. The tanks are arranged on the side of the sewage holding tank in sequence, and the air compressor, the oil-water filter and the air storage tank are all connected by an air supply pipeline. The air supply pipeline is provided with an air supply manual ball valve. The pressure valves are respectively arranged on the top of the gas storage tank and the gas supply pipeline, and the gas storage tank and the sewage holding tank communicate with each other through the gas supply pipeline.

Further, the positioning and feeding device includes a waste liquid pool, a feeding pump, a feeding pipeline, a discharging pipeline, a feeding pipeline, a feeding pressure valve and several feeding manual ball valves, and the liquid level sensing instrument is arranged at the On the side wall in the waste liquid pool, the waste liquid pool and the feed pump are communicated through a feed pipe, one end of the discharge pipe is communicated with the feed pump, and the other end is communicated with the sewage holding tank. One end of the feeding pipeline is communicated with the middle part of the discharging pipeline, and the other end is communicated with the waste liquid pool. Set on the discharge pipe.

Further, the purification and backflushing component includes a backflushing communication pipe, a backflushing manual ball valve, a backflushing pressure valve and a backflushing feed port, and one end of the backflushing communication pipe is connected to the air supply close to the gas storage tank. The pipeline is connected, and the other end is connected with the backflushing feed port, and the backflushing manual ball valve and the backflushing pressure valve are arranged on the backflushing communication pipeline.

Further, the filtrate discharge component includes a circulating water intake assembly and a purified water discharge assembly, the circulating water intake assembly includes a positioning water outlet, a circulating connecting pipe and a positioning water inlet, and the positioning water outlet and the positioning water inlet are respectively arranged in the buckle. The top of the tight lid and the sewage holding tank, the two ends of the circulating connection pipe are respectively connected with the positioning water outlet and the positioning water inlet, and the purified water discharge assembly includes a purified water discharge port and a purified water discharge pipe, and the purified water discharge The outlet is arranged on the side wall of the sewage holding tank, and one end of the purified water discharge pipe is communicated with the purified water discharge port.

Further, the filter residue discharge component includes a residue discharge port and a filter residue discharge pipe, the residue discharge port is arranged at the bottom of the fastening cover, and one end of the filter residue discharge pipe is communicated with the residue discharge port.

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

First, due to its unique structure, the present application has the advantages of high efficiency, energy saving, and fully automatic airtight filtration. Filtration precision is 0.3~100 microns, good corrosion resistance, acid and alkali resistance, oil and salt resistance; resistance to most organic solutions such as grease, ketone, ether, aldehyde, etc., no odor leakage, complete airtightness, complete clarification after one filtration, filter residue, The residual liquid is completely recovered without any environmental pollution. The bottom of the filter is equipped with a large-diameter open-door slag discharge port, and the filter residue is discharged from the bottom slag discharge port, which can be easily and automatically removed. The filtrate and filter residue can be recovered together, reducing cost and waste, and making the filtration and drying more thorough and ideal. It can be connected with the control room, so that the whole filtration process can be fully automated, reducing the number of operators, and the operation is simple and convenient. Equipment cost and operating cost are low, maintenance and maintenance are very convenient, and ideal economic benefits are achieved.

Second, the present application can simultaneously recover the filtrate and the filter residue in the filter material, and the filter residue can be recovered in a relatively dry solid state. To recover the filtrate, just start the feed pump to transport the filter material through the filter; before the filter residue is recovered, use compressed air to squeeze the filter residue in the filter body to make it dry and solid, and finally discharge the residue from the bottom The outlet is discharged for recovery.

Third, traditional and existing filters generally have a maximum filtration precision of 5 microns. When a higher filtration precision is selected, the body is relatively large. The filtration precision of the present application is 0.3 to 100 microns. The filtrate was filtered and decolorized. Compared with the traditional and existing filters, the volume of the body of the present application is relatively small.

Fourth, the application uses the liquid level sensing instrument in the waste water tank to automatically control the start and stop of the feed pump of the filter. When the feed pump starts, the filter works to filter the filter material, the filtrate is discharged from the outlet of the filter, and the filter residue is discharged. Stored in the filter body; when the feed pump stops, the filter stops working;

For filter residue recovery, just on the control cabinet, control the locking of the bottom residue discharge port and the opening of the cover opening cylinder, and the filter residue can be automatically discharged from the filter;

The filter is equipped with a pressure sensing instrument. When the working pressure of the filter is exceeded, the operator can be instructed in real time to recover the filter residue in time;

Filter control system, PLC programmable controller, LCD touch screen and DCS remote monitoring system can be added according to user requirements.

Fifth, in the present application, after the filter material reaches the service period, the filter material can be regenerated by physical or chemical means, so as to achieve the purpose of repeated use and reduce the operating cost of the filter.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the first structure schematic diagram of the present invention;

Fig. 2 is the second structure schematic diagram of the present invention;

Fig. 3 is the third structural schematic diagram of the present invention;

FIG. 4 is a schematic structural diagram of the sewage holding device, the positioning air supply device and the positioning feeding device according to the present invention.

Reference numerals: sewage accommodating device 1, sewage accommodating tank 1a, positioning and fastening part 1b, fastening cover 1b1, first opening cylinder 1b2, first hinge plate 1b3, positioning cover part 1c, second opening cylinder 1c1 , the second hinge plate 1c2, the positioning air supply device 2, the air compressor 2a, the oil-water filter 2b, the air storage tank 2c, the air supply pipeline 2d, the air supply manual ball valve 2e, the air supply pressure valve 2f, the positioning and feeding device 3 , waste liquid pool 3a, feed pump 3b, feed pipe 3c, discharge pipe 3d, return pipe 3e, feed pressure valve 3f, feed manual ball valve 3g, sewage purification device 4, sewage filter part 5, the first Filter assembly 5a, positioning and installation strip 5a1, filter plate 5a2, second filter assembly 5b, filter installation plate 5b1, vertical positioning column 5b2, sewage purification plate 5b3, carrying water inlet part 6, water inlet pipe 6a, positioning water pump 6b , control valve 6c, connecting pipeline 6d, purification backflushing component 7, backflushing communication pipeline 7a, backflushing manual ball valve 7b, backflushing pressure valve 7c, backflushing feed port 7d, filtrate discharge component 8, circulating water component 8a , Positioning water outlet 8a1, circulating connection pipe 8a2, positioning water inlet 8a3, purified water discharge assembly 8b, purified water discharge port 8b1, purified water discharge pipe 8b2, filter residue discharge part 9, residue discharge port 9a, filter residue discharge pipe 9b.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.

The components of the embodiments of the invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1 to 4, an embodiment of the present invention provides a fully automatic precision filter, including a sewage holding device 1, a positioning air supply device 2, a positioning feeding device 3, a sewage purification device 4 and a control device, The positioning air supply device 2 , the positioning feeding device 3 and the sewage purification device 4 are all electrically connected to the control device, and the positioning air supply device 2 and the positioning feeding device 3 are all arranged on the side of the sewage holding device 1 and Connected with the sewage holding device 1, the sewage purification device 4 includes a sewage filter part 5, a carrying water inlet part 6, a purification backflushing part 7, a filtrate discharge part 8 and a filter residue discharge part 9, and the sewage filter part 5 is arranged in the sewage. In the accommodating device 1, the carrying water inlet member 6 is arranged below the sewage accommodating device 1 and communicates with the carrying water feeding member 6, and the purifying backflushing member 7 is disposed on the side wall of the sewage accommodating device 1 and communicates with it, The inlet end of the purifying backflushing part 7 is communicated with the positioning air supply device 2, and the discharge ends of the filtrate discharge part 8 and the filter residue discharge part 9 are both communicated with the sewage holding device 1. Because of its unique structure, the present application has The advantages of high efficiency, energy saving, fully automatic airtight filtration. The filtration precision is 0.3~100 microns, and it is resistant to corrosion and acid, alkali, oil, and salt; resistant to most organic solutions such as grease, ketone, ether, aldehyde, etc., no odor leakage, complete airtightness, one filtration is completely clarified, and the filtration residue, The residual liquid is completely recovered without any environmental pollution. The bottom of the filter is provided with a large diameter opening slag discharge port 9a, and the filter residue is discharged from the bottom slag discharge port 9a, which can be easily and automatically removed, and the filtrate and filter residue can be recovered together, reducing cost and waste, and making filtration and drying more thorough and ideal. . It can be connected with the control room, so that the whole filtration process can be fully automated, reducing the number of operators, and the operation is simple and convenient. Equipment cost and operating cost are low, maintenance and maintenance are very convenient, and ideal economic benefits are achieved.

The control device includes a remote control system, a positioning controller and a number of liquid level sensing instruments. The remote control system is installed in the operator's operable area. The positioning controller is connected to the sewage filter part 5 and the water inlet part 6. , The purification backflushing part 7, the filtrate discharge part 8 and the filter residue discharge part 9 are electrically connected, and several of the liquid level sensing instruments are electrically connected with the positioning controller, and the operator can realize the waste liquid through remote control. The filtering operation improves the efficiency of the filtering operation.

The sewage holding device 1 includes a sewage holding tank 1a, a positioning and locking part 1b and a positioning and capping part 1c. The sewage holding tank 1a is a cylindrical hollow structure. Located on both sides of the sewage holding tank 1a, the positioning and fastening parts 1b include a fastening cover 1b1, a first cover opening cylinder 1b2 and a first hinge plate 1b3, and the fastening cover 1b1 is arranged on the tank of the sewage holding tank 1a. At the bottom opening, the first hinge plate 1b3 is integrally formed with the fastening cover 1b1, the end of the telescopic rod of the first cover opening cylinder 1b2 is fixedly connected with one end of the first hinge plate 1b3, and the first cover opening cylinder The rear end of 1b2 is hinged with the side wall of the sewage holding tank 1a, and the positioning cover part 1c includes a second opening cylinder 1c1 and a second hinge plate 1c2, and the end of the telescopic rod of the second opening cylinder 1c1 is connected with the first opening cylinder 1c1. The side walls of the two hinge plates 1c2 are hinged, and the rear end of the second cover opening cylinder 1c1 is hinged with the sewage holding tank 1a. In the buckled state, the second hinge plate 1c2 will fasten the cover and the sewage holding tank 1a. For locking and forming, the filter residue can be recovered. The filter residue can be automatically discharged from the filter only by controlling the locking of the bottom residue discharge port 9a, opening the first cover opening cylinder 1b2 and the second cover opening cylinder 1c1 on the control cabinet.

The sewage filter component 5 includes a first filter assembly 5a and a second filter assembly 5b, the first filter assembly 5a is disposed in the middle part of the sewage holding tank 1a, and the second filter assembly 5b is disposed in the sewage holding tank 1a. The bottom of the first filter assembly 5a includes a positioning and mounting strip 5a1 and a number of filter plates 5a2 arranged at intervals, and several of the filter plates 5a2 are sequentially installed on the bottom of the positioning and mounting strip 5a1. It includes a filter mounting plate 5b1, a vertical positioning column 5b2, and several groups of sewage purification plates 5b3 arranged on the vertical positioning column 5b2 at intervals. The positioning column 5b2 is installed on the filter mounting plate 5b1. The filter plate 5a2 and the sewage purification plate 5b3 have a filtration accuracy of 0.3-100 microns. Under the condition of high filtration accuracy, the filtrate can be filtered and decolorized. Compared with the traditional and existing filters, the volume of the body of the present application is relatively small.

The carrying water inlet component 6 includes a water inlet pipe 6a, a positioning water pump 6b, a control valve 6c and a connecting pipe 6d. The positioning water pump 6b is arranged on the side of the sewage holding tank 1a. The water pump 6b is connected, and the other end is connected to the water point to be connected. One end of the connecting pipe 6d is connected to the outlet end of the positioning water pump 6b, and the other end is connected to the sewage holding tank 1a, because in the process of treatment, it is necessary to pass the purified water. Dilute the waste liquid to reduce the viscosity of the waste liquid and improve the filtration precision of the sewage.

The positioning air supply device 2 includes an air compressor 2a, an oil-water filter 2b, an air storage tank 2c, several air supply pipes 2d, several air supply manual ball valves 2e and several air supply pressure valves 2f. The air compressor 2a, The oil-water filter 2b and the air storage tank 2c are arranged on the side of the sewage holding tank 1a in sequence. The pipeline 2d is provided with an air supply manual ball valve 2e, the air supply pressure valve 2f is respectively arranged on the top of the air storage tank 2c and on the air supply pipeline 2d, and the air supply is passed between the air storage tank 2c and the sewage holding tank 1a. The pipeline 2d is connected, and before the filter residue is recovered, compressed air is used to press the filter residue in the filter body to make it a dry solid state, and finally it is discharged and recovered from the bottom residue discharge port 9a.

The positioning and feeding device 3 includes a waste liquid pool 3a, a feeding pump 3b, a feeding pipeline 3c, a discharging pipeline 3d, a feeding pipeline 3e, a feeding pressure valve 3f and several feeding manual ball valves 3g. The sensing instrument is arranged on the side wall of the waste liquid pool 3a, the waste liquid pool 3a and the feed pump 3b are communicated through the feed pipe 3c, and one end of the discharge pipe 3d is connected to the feed pump 3b. The other end is communicated with the sewage holding tank 1a, one end of the return pipe 3e is communicated with the middle part of the discharge pipe 3d, and the other end is communicated with the waste liquid pool 3a. On the material pipe 3c, the discharge pipe 3d and the return pipe 3e, the feeding pressure valve 3f is arranged on the discharge pipe 3d. Start and stop, when the feeding pump 3b starts, the filter works to filter the filter material, the filtrate is discharged from the outlet of the filter, and the filter residue is stored in the filter body; when the feeding pump 3b stops, the filter stops working

The purification and backflushing component 7 includes a backflushing communication pipe 7a, a backflushing manual ball valve 7b, a backflushing pressure valve 7c and a backflushing feed port 7d. One end of the backflushing communication pipe 7a is close to the gas storage tank 2c. The air supply pipeline 2d is connected, and the other end is connected with the backflushing feed port 7d. The backflushing manual ball valve 7b and the backflushing pressure valve 7c are arranged on the backflushing communication pipeline 7a.

The filtrate discharge part 8 includes a circulating water inlet assembly 8a and a purified water discharge assembly 8b. The circulating water inlet assembly 8a includes a positioning water outlet 8a1, a circulating connecting pipe 8a2 and a positioning water inlet 8a3. The positioning water outlet 8a1 and the positioning water outlet 8a1 The water inlets 8a3 are respectively arranged on the tops of the fastening cover 1b1 and the sewage holding tank 1a, the two ends of the circulating connection pipe 8a2 are respectively connected with the positioning water outlet 8a1 and the positioning water inlet 8a3, and the purified water discharge assembly 8b includes purified water. A discharge port 8b1 and a purified water discharge pipe 8b2, the purified water discharge port 8b1 is provided on the side wall of the sewage holding tank 1a, one end of the purified water discharge pipe 8b2 is communicated with the purified water discharge port 8b1, and the assembly can be carried out through circulation. The wastewater to be treated can be repeatedly treated several times, thereby improving the accuracy of the wastewater treatment and improving the efficiency of wastewater treatment.

The filter residue discharge part 9 comprises a residue discharge port 9a and a filter residue discharge pipe 9b, the residue discharge port 9a is arranged at the bottom of the fastening cover 1b1, and one end of the filter residue discharge pipe 9b is communicated with the residue discharge port 9a, and the filter residue is recovered, Just on the control cabinet, control the locking and opening cylinder of the bottom slag discharge port 9a to open, and the filter slag can be automatically discharged from the filter.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (10)

1. A fully automatic precision filter, characterized in that it comprises a sewage containing device (1), a positioning air supply device (2), a positioning feeding device (3), a sewage purification device (4) and a control device, the said The positioning air supply device (2), the positioning feeding device (3) and the sewage purification device (4) are all electrically connected with the control device, and the positioning air supplying device (2) and the positioning feeding device (3) are all arranged in the The sewage accommodating device (1) is on the side and communicated with the sewage accommodating device (1), the sewage purifying device (4) includes a sewage filtering part (5), a carrying water inlet part (6), and a purifying backflushing part (7) , a filtrate discharge part (8) and a filter residue discharge part (9), the sewage filter part (5) is arranged in the sewage holding device (1), and the carrying water inlet part (6) is arranged in the sewage holding device (1) The bottom of the purifying backflushing component (7) is arranged on the side wall of the sewage holding device (1) and communicates with it, and the air inlet end of the purifying backflushing component (7) is It is communicated with the positioning air supply device (2), and the discharge ends of the filtrate discharge part (8) and the filter residue discharge part (9) are both communicated with the sewage accommodating device (1). 2. A fully automatic precision filter according to claim 1, characterized in that: the control device comprises a remote control system, a positioning controller and several liquid level sensing instruments, and the remote control system is installed in the operator In the operable area, the positioning controller is electrically connected with the sewage filtering part (5), the carrying water inlet part (6), the purification and backflushing part (7), the filtrate discharge part (8) and the filter residue discharge part (9). , and several of the liquid level sensing instruments are electrically connected with the positioning controller. 3 . The fully automatic precision filter according to claim 1 , wherein the sewage holding device ( 1 ) comprises a sewage holding tank ( 1 a ), a positioning and snap-fitting part ( 1 b ) and a positioning and capping part ( 3 . 3 . 1c), the sewage accommodating tank (1a) is a cylindrical hollow structure, and the positioning and snap-fitting parts (1b) and the positioning and capping parts (1c) are respectively arranged on both sides of the sewage accommodating tank (1a). The fastening component (1b) comprises a fastening cover (1b1), a first cover-opening cylinder (1b2) and a first hinge plate (1b3), the fastening cover (1b1) being arranged on the bottom of the sewage holding tank (1a) At the opening, the first hinge plate (1b3) is integrally formed with the fastening cover (1b1), and the end of the telescopic rod of the first cover opening cylinder (1b2) is fixedly connected to one end of the first hinge plate (1b3), The rear end of the first cover opening cylinder (1b2) is hinged with the side wall of the sewage holding tank (1a), and the positioning cover part (1c) includes a second cover opening cylinder (1c1) and a second hinge plate (1c2) ), the end of the telescopic rod of the second opening cylinder (1c1) is hinged with the side wall of the second hinge plate (1c2), and the rear end of the second opening cylinder (1c1) is connected to the sewage holding tank (1a) Hinged, in the buckling state, the second hinge plate (1c2) locks and forms the buckling plate cover and the sewage holding tank (1a). 4. A fully automatic precision filter according to claim 3, characterized in that: the sewage filter component (5) comprises a first filter assembly (5a) and a second filter assembly (5b), the first filter assembly (5b) The filter assembly (5a) is disposed in the middle part of the sewage holding tank (1a), the second filter assembly (5b) is disposed at the bottom of the sewage holding tank (1a), and the first filter assembly (5a) includes a positioning installation The slats (5a1) and a plurality of filter plates (5a2) arranged at intervals, a plurality of the filter plates (5a2) are sequentially installed on the bottom of the positioning and installation slats (5a1), and the second filter assembly (5b) includes a filter installation A plate (5b1), a vertical positioning column (5b2) and several groups of sewage purification plates (5b3) arranged on the vertical positioning column (5b2) at intervals, the filter mounting plate (5b1) is arranged in the sewage holding tank (1a) At the inner bottom end, the vertical positioning column (5b2) is mounted on the filter mounting plate (5b1). 5. A fully automatic precision filter according to claim 4, characterized in that: the bearing water inlet component (6) comprises a water inlet pipe (6a), a positioning water pump (6b), a control valve (6c) and A connecting pipe (6d), the positioning water pump (6b) is arranged on the side of the sewage holding tank (1a), one end of the water inlet pipe (6a) is connected with the positioning water pump (6b), and the other end is connected with the water point to be connected Connection, one end of the connecting pipe (6d) is connected with the water outlet end of the positioning water pump (6b), and the other end is communicated with the sewage holding tank (1a). 6. A fully automatic precision filter according to claim 2, characterized in that: the positioning air supply device (2) comprises an air compressor (2a), an oil-water filter (2b), an air storage tank (2c) ), several air supply pipes (2d), several air supply manual ball valves (2e) and several air supply pressure valves (2f), the air compressor (2a), the oil-water filter (2b) and the air storage tank (2c) The air compressor (2a), the oil-water filter (2b) and the air storage tank (2c) are all connected by an air supply pipeline (2d), and the An air supply manual ball valve (2e) is arranged on the air pipeline (2d), and the air supply pressure valve (2f) is respectively arranged on the top of the air storage tank (2c) and on the air supply pipeline (2d). (2c) communicates with the sewage holding tank (1a) through a gas supply pipe (2d). 7 . The fully automatic precision filter according to claim 6 , wherein the positioning and feeding device ( 3 ) comprises a waste liquid pool ( 3 a ), a feeding pump ( 3 b ), and a feeding pipeline ( 3 c ). 8 . ), a discharge pipe (3d), a return pipe (3e), a feeding pressure valve (3f) and several feeding manual ball valves (3g), the liquid level sensing instrument is arranged in the waste liquid pool (3a) On the inner side wall, the waste liquid pool (3a) and the feed pump (3b) are communicated through a feed pipe (3c), and one end of the discharge pipe (3d) is communicated with the feed pump (3b) , the other end is communicated with the sewage holding tank (1a), one end of the return pipe (3e) is communicated with the middle part of the discharge pipe (3d), and the other end is communicated with the waste liquid pool (3a). Manual ball valves (3g) are respectively arranged on the feed pipe (3c), the discharge pipe (3d) and the return pipe (3e), and the feed pressure valve (3f) is arranged on the discharge pipe (3d). 8. A fully automatic precision filter according to claim 7, characterized in that: the purification backflushing component (7) comprises a backflushing communication pipe (7a), a backflushing manual ball valve (7b), a backflushing pressure A valve (7c) and a backflushing feed port (7d), one end of the backflushing communication pipe (7a) is communicated with the gas supply pipe (2d) close to the gas storage tank (2c), and the other end is connected with the counter The blowing feed port (7d) is in butt communication, and the back blowing manual ball valve (7b) and the back blowing pressure valve (7c) are arranged on the back blowing communication pipe (7a). 9 . The fully automatic precision filter according to claim 8 , wherein the filtrate discharge component ( 8 ) comprises a circulating water inlet component ( 8 a ) and a purified water discharge component ( 8 b ). 9 . The water assembly (8a) includes a positioning water outlet (8a1), a circulation connection pipe (8a2) and a positioning water inlet (8a3), the positioning water outlet (8a1) and the positioning water inlet (8a3) are respectively provided on the fastening cover (1b1) ) and the top of the sewage holding tank (1a), the two ends of the circulating connection pipe (8a2) are respectively connected with the positioning water outlet (8a1) and the positioning water inlet (8a3), and the purified water discharge assembly (8b) includes a purification A water discharge port (8b1) and a purified water discharge pipe (8b2), the purified water discharge port (8b1) is provided on the side wall of the sewage holding tank (1a), and one end of the purified water discharge pipe (8b2) is connected to the purified water The water discharge port (8b1) communicates. 10. A fully automatic precision filter according to claim 3, characterized in that: the filter residue discharge component (9) comprises a residue discharge port (9a) and a filter residue discharge pipe (9b), and the residue discharge port (9a) 9a) is arranged at the bottom of the fastening cover (1b1), and one end of the filter residue discharge pipe (9b) is communicated with the residue discharge port (9a).