47results about How to "With backwash function" patented technology

The invention discloses a ball-throwing type layered sand control process pipe column and a method thereof. The pipe column comprises a sand control outer pipe and a sand control inner pipe placed inside the sand control outer pipe, wherein the sand control outer pipe comprises a top suspension setting mechanism, a reverse well-flushing device, external filling devices, screen tubes and a pipe plug from top to bottom, and the top suspension setting mechanism, the reverse well-flushing device, the external filling devices, the screen tubes and the pipe plug are connected in sequence. The sand control inner tube includes a releasing mechanism, inner filling devices, a switch mechanism and a bottom positioning device from top to bottom, wherein the releasing mechanism, the inner filling devices, the switch mechanism and the bottom positioning device are connected in sequence. The number of the inner filling devices is consistent with that of the external filling devices in each oil reservoir, and the inner filling devices and the external filling devices correspond to each other in the radial direction. Internal well-flushing valves are installed between every two inner filling devices. The ball-throwing type layered sand control process pipe column and the method thereof can realize completion of layered sand control construction of a multiple zone by one-trip pipe column, ensureindependence between layers, and give full play to the productivity of each small layer to achieve the best sand control production effect.

The invention relates to an oily sewage treatment apparatus and a treatment method thereof. An upper precipitation zone and a lower precipitation zone are arranged to realize full precipitation, the bottom of a first precipitation zone forms an inclined plane used for recovering a waste material, a second precipitation zone is formed below the inclined plane of the first precipitation zone, the first precipitation zone is connected with the second precipitation zone through a first overflow pipeline, and a control valve controlled by a water level induction switch is arranged in the pipeline. The second precipitation zone is connected with an oil-water separation zone through a second overflow pipeline, an oil collecting chamber and an oil overflow opening are arranged at the top of the oil-water separation zone, the oil-water separation zone and the oil collecting chamber are divided by a separator plate to form a left chamber and a right chamber, and a conduit used for conducting the left chamber with the right chamber is arranged on the separator plate; and a filter zone and a clear water zone are arranged adjacent to the right chamber of the oil-water separation zone, a filter layer is arranged in the filter zone, the top of the filter layer is connected with the bottom of the right chamber of the oil-water separation zone through a third overflow pipeline, the bottom of the filter layer is connected to the upper portion of the clear water zone through a flow guiding tube provided with a switch valve, and the clear water zone is correspondingly provided with a water discharge opening in order to realize step-by-step filtering discharge of sewage.

The invention discloses an open-hole horizontal well bottom reverse packing multi-layer sand control tubular column to meet the increasing demand for open-hole horizontal well sand control technologies. The technology comprises two trips of tubular columns - a retention well sand control tubular column and a packing service tubular column, a mean of bottom reverse pack is adopted, gravel pack of all layers can be achieved in one trip of packing service tubular column, packing compaction is good, construction layers and positions are numerous, operation is simple, and reliability is high. According to the open-hole horizontal well bottom reverse packing multi-layer sand control tubular column, the technical problem that bottom reverse packing multi-layer sand control cannot be achieved in the existing sand control tubular column is solved; through a bottom-up packing mean, the technical advantage of the bottom reverse packing multi-layer sand control is fully developed, and a packing interval is long, packing compaction is good and construction reliability is high; the packing jobs in all positions can be achieved through one trip of packing service tubular column, and the functions of a squeeze packing and a circulating packing are provided; the technical problem that a horizontal well multi-layer squeeze packing cannot be achieved in the prior art is solved.

A prefilter comprises a connecting part, a filtering part and a drain valve sequentially from top to bottom, wherein a source water inlet is formed in one side of the connecting part, and a filter water outlet is formed in the other side corresponding to the one side; a filtering part port is arranged at a port of the lower end part of the connecting part, a filter core port is arranged in the lower end part of the connecting part, wherein the filter core port is concentric with the filtering part port; the filtering part sequentially comprises a filtering part sleeve, a filter core and a scrapping device from outside to inside; one end of the scraping device is fixed in the filter core port and integrally located in the filter core; one end of the filter core is arranged outside the filter core port in a sleeving manner, and drives the filter core to integrally rotate when the drain valve is rotated, so as to form a relative scraping movement between the surface of a filter screen and the scraping device to achieve a purpose of removing impurities on the surface of the filter screen. Preferably, a T-shaped three-way valve is also arranged in the connecting part, a waterflow direction is switched by adjusting the T-shaped three-way valve, so that the waterflow reversely enters the filter core to realize reverse flushing on the impurities on the surface of the filter screen.

The invention discloses a sewage treatment unit, which comprises an aeration chamber (1), a contact chamber (2), a settling chamber (3) and an MBR chamber (4), wherein the aeration chamber (1) is communicated with the contact chamber (2) by a filter sieve plate (5); the contact chamber (2) is communicated with the settling chamber (3) by the filter sieve plate (5); the settling chamber (3) is communicated with the MBR chamber (4) by a filter bag (11); a membrane module (6) is arranged in the MBR chamber (4); the outlet of the membrane module (6) is communicated with an ultraviolet sterilization device (8) by a sorption pump (7); and the outlet of the ultraviolet sterilization device (8) is connected with the outside of a cabin. The sewage treatment unit provided by the invention has low cost, high performance and long service life and can meet the discharge index of the new 'convention'.

The invention discloses equipment for rapidly detecting pesticide residues in fruit and vegetable products. The equipment mainly consists of a to-be-tested sample liquid preparation device, an allocation device, a conveying device, to-be-tested sample liquid storage devices, a rotating disc and a detection analysis device, wherein the to-be-tested sample liquid preparation device is connected withthe allocation device through a tube connector; a to-be-tested sample liquid is allocated into the to-be-tested sample liquid storage devices and is further transferred to the rotating disc through the conveying device; the detection analysis device is positioned on the right side of the rotating disc; the detection analysis device is internally provided with optical detection equipment and a host computer; the optical detection equipment is connected with the host computer through a conduction lead. By adopting the equipment, crushing, extraction, purification, sample liquid preparation, sample liquid allocation, sample liquid conveying and sample liquid detection are integrated, a high automation degree is achieved, the operation can be implemented rapidly and conveniently, pesticide residues on a sample to be tested can be rapidly and effectively detected, relatively detection results can be achieved, pesticide residues of a plurality of different samples to be tested can be detected continuously within a short time, and thus high efficiency is achieved.

A prefilter comprises a connecting part, a bottle body, a flexible scraping swob, a filter cartridge, a rotary component, a drainage tube and a blow-down valve, and is characterized in that a body of the connecting part is provided with a water inlet, a water outlet, a bottle body connector, a filter core connector, a drainage tube connector and a blow-down valve connector, wherein one end of the drainage tube is fixedly connected with the drainage tube connector; one end of the filter cartridge is connected with the filter cartridge connector, and the other end sleeves the outside of the drainage tube and sealing match is formed at the contact position of the other end; one end of the bottle body is connected and fixed with the bottle connector by threads, and the other end is provided with the rotary component; the flexible scraping swob is arranged on the inner wall of the bottle body or on the rotary component, and is always in close contact with the outer surface of the filter cartridge; the blow-down valve connector is arranged at the bottom end of an interlayer formed between the inner wall of the bottle body and the outer wall of the filter cartridge and is communicated with the interlayer, and the blow-down valve and the blow-down valve connector are connected. As a preference, a three-way valve is further arranged in the connecting part.

The invention discloses integrated sewage purifying treatment equipment with a backwashing function. The integrated sewage purifying treatment equipment comprises a first purifying device, a second purifying device and a water pump, a water inlet pipe is fixedly arranged at the bottom of the left end of the first purifying device, and a reverse osmosis membrane filter screen and a plastic particle filter screen are installed and distributed in the first purifying device; a suction pump is arranged at the top of the first purifying device, a vertical pipe frame is connected to the bottom of the suction pump, adsorption plates are fixedly distributed at the two ends of the vertical pipe frame, a vibration device is arranged at the right end of the top of the first purifying device, and a water pumping pipe is connected to the upper end of the right side of the first purifying device through a connecting port; and the middle of the water pumping pipe is connected with a filter cylinder, and the bottom of the water pumping pipe is connected with the second purifying device through the water pump. The integrated sewage purifying treatment equipment relates to the technical field of sewage purifying, effectively removes dissolved salts, colloids, microorganisms, organic matters and the like in sewage so as to achieve the purpose of purifying water quality, directly adsorbs metal impurity particles in water, and is suitable for sewage purifying treatment.

The invention discloses an adjusting device for treating domestic sewage. According to the adjusting device, sewage collecting pipelines for collecting grey water and black water are connected to the adjusting device and the adjusting device is connected to an electrolysis device by a pipeline; the adjusting device comprises an adjusting pool with an Inverted-right-angled-trapezoid-shaped structure, wherein the adjusting pool is divided by a vertical plate into a chamber I and a chamber II of which the bottoms are connected; one side of the upper part of the chamber I is connected with the sewage collecting pipelines; an inclined board is arranged in the chamber II, wherein gaps are left between the inclined board and both the upper and lower inner walls of the chamber two; a crushing pump is connected to the bottom of the adjusting pool and the chamber II by pipelines; a water collecting head with filter holes is arranged at one side of the chamber two and is connected to a water connector which is located outside the adjusting pool; and filtered sewage is provided to the electrolysis device by the water collector via a pipeline and a delivery pump. The adjusting device for treating domestic sewage is simple in structure, capable of fining the particles in the domestic sewage only by physical and mechanical effects and capable of relatively stabilizing the indexes such as the pH and the salt content. According to the adjusting device for treating domestic sewage, no large-granule solid waste in the sewage for electrolysis treatment is ensured, so that impact to the electrolysis device is avoided.

The invention relates to preparation of high-precision filter element used for a security filter and application technology thereof, in particular to a preparation and application technology of a filter element in a security filter in front of a membrane during wastewater deep treatment and reuse. The filter element provided in the invention solves the technical problems that spray melt or wound PP filter elements currently used in industry have low precision, are easy to cause deep pollution, and cannot realize repeated use through chemical cleaning. The filter element involved in the invention can mainly be used in the security filter of a double-membrane system to perform operation and replacement in a membrane method sewage treatment field, and also can be applied in water treatment processes that have high filtration precision requirements and can have discharged water used for oilfield reinjection water and circulating water supplement. In a conventional biochemical treatment unit, the filter element can take the place of or partially substitute the sedimentation function of a secondary sedimentation tank, thus meeting stricter discharged water quality requirements.

The invention discloses a table-top large-flow water purifier, which comprises an upper barrel, a lower barrel and a base, wherein the upper barrel has a water outlet, the lower barrel has a water inlet, and the upper and lower barrels are connected by a hoop; and a filter core is arranged between the upper and lower barrels, and the lower barrel is arranged on the base. The filter core comprises an outer filtering layer made of a sintered PP material, an inner ceramic filtering layer and one or more filling filter material of granular active carbon, bacteriostatic agent and ion exchange resin. End covers are arranged on the upside and lower side of the filter core. The table-top large-flow water purifier adopts a multifunctional filtration mode and has functions of gradient filtration, absorption, scale restraint, softening and the like, and water current is in a radial form and has small resistance and large flow; the filter core is easy to wash and exchange and has a backwash function and a long service life; and meanwhile, each filtering unit is independently exchanged according to the practical using condition thereof, so operation cost is saved.

The invention provides a filtering laminating piece and a laminated type filter. The filtering laminating piece comprises a laminating piece main body and multiple bending units; the laminating piecemain body comprises an inner ring wall and an outer ring wall; the multiple bending units are connected orderly end to end and arranged on the upper surface of the laminating piece main body; each bending unit is provided with a first isolating wall and a second isolating wall; the first isolating wall and the second isolating wall are formed with first inlets at the outer ring wall, and two adjacent bending units are formed with outlets at the inner ring wall; multiple guide flow channels are arranged on the first isolating wall and the second isolating wall, and connected to the first inletand the first outlet. The filtering laminating piece is simple in structure, good in filtering effect and has back flushing function; the laminated type filter with the filtering laminating piece canaccurately filter water flow, and the filtering efficiency is high.

The invention relates to a device and a method for preventing a feeding valve of a ceramic filter from being blocked, which comprises a main pulp pipeline, a distribution barrel, a mixing barrel, the feeding valve and the ceramic filter. Pulp of the main pulp pipeline enters the distribution barrel which distributes the pulp to one or a plurality of mixing barrels, and each mixing barrel is connected with each ceramic filter through a pipeline. The feeding valve is disposed on the pipeline and divides the pipeline into a feeding valve front section pipeline and a feeding valve rear end pipeline. Mineral powder accumulated in the feeding valve, the feeding valve front section pipeline and the feeding valve rear end pipeline is washed and dredged through a backwash device. Due to the fact that after the backwash device and the method are arranged, the blocked valve pipeline of the ceramic filter can be directly washed without stopping other ceramic filters and mixing barrels, productionefficiency is greatly improved.

The invention discloses a pipeline mechanism with a backwashing function. The pipeline mechanism comprises a first straight pipe, the side wall of the first straight pipe communicates with a second straight pipe, and the second straight pipe connects the first straight pipe. The straight pipe is divided into a first straight pipe part and a second straight pipe part which communicate with each other; The second straight pipe part is connected, the first straight pipe part is provided with a first valve, the elbow pipe is provided with a second valve, and the inside of the second straight pipe part is provided with a filtering mechanism, which solves the existing problem The inside of the drain pipe is easily blocked by debris, and the blocked drain pipe is also extremely difficult to clean, which greatly reduces the drainage capacity of the drainage system.

The invention discloses equipment for rapidly detecting pesticide residues in fruit and vegetable products. The equipment mainly consists of a to-be-tested sample liquid preparation device, an allocation device, a conveying device, to-be-tested sample liquid storage devices, a rotating disc and a detection analysis device, wherein the to-be-tested sample liquid preparation device is connected withthe allocation device through a tube connector; a to-be-tested sample liquid is allocated into the to-be-tested sample liquid storage devices and is further transferred to the rotating disc through the conveying device; the detection analysis device is positioned on the right side of the rotating disc; the detection analysis device is internally provided with optical detection equipment and a host computer; the optical detection equipment is connected with the host computer through a conduction lead. By adopting the equipment, crushing, extraction, purification, sample liquid preparation, sample liquid allocation, sample liquid conveying and sample liquid detection are integrated, a high automation degree is achieved, the operation can be implemented rapidly and conveniently, pesticide residues on a sample to be tested can be rapidly and effectively detected, relatively detection results can be achieved, pesticide residues of a plurality of different samples to be tested can be detected continuously within a short time, and thus high efficiency is achieved.

The invention discloses a bottom sinking type automatic surface water collecting system. The system comprises a water tank, a water collection pump, a pipeline, a floating rod, a filter, a buoy, a heavy block, fixing steel ropes, fixing piles and a control unit, the two water collection pumps are arranged in the closed water tank; the water collecting pump is connected with a water inlet pipelineand a water outlet pipeline; the floating rod is flexibly connected with the water tank water inlet; a sand outlet is formed in the bottom of the water tank; the water tank is prevented from being washed away; heavy blocks are connected to two ends of the water tank; meanwhile, the front end of the water tank is connected to the fixed pile; after the control unit sends a water sampling command, the water sampling pump is started, surface water to be detected enters the water tank from the floating rod water inlet hole and is conveyed to the automatic water quality monitoring station pretreatment unit through a pipeline, the water sampling system is provided with a cleaning pipeline and a backwashing pipeline at the same time, backwashing can be conducted on the water sampling system, and the whole water sampling system is subjected to instruction sending through the control unit. The water sampling system is low in construction cost, low in construction difficulty, high in operability,low in operation and maintenance cost and suitable for rivers, lakes and reservoirs with relatively shallow water levels and slow water flow.

The invention relates to a portable waterer which comprises a shell, a piston rod and a filtration membrane; the side wall of the shell is provided with at least one water outlet, and the lower end of the shell is connected with raw water; the shell is internally provided with a cylinder body, and the piton rod is movably connected into the cylinder body; the filtration membrane is arranged in the shell and is positioned out of the cylinder body, and comprises a plurality of nanofiltration membranes which are hollow and tubular; and at the head and tail parts of the nanofiltration membranes, the nanofiltration membranes are connected in a sealed manner, the nanofiltration membranes and the shell are connected in a sealed manner, and the nanofiltration membranes and the cylinder body are connected in a sealed manner. The waterer is small in size, can be carried along, filters water by adopting the nanofiltration membranes, can purify water through operations of extracting and pressing a handle; the technical problem in the prior art that a water treatment device is large in size and cannot be carried along is solved, and water supply issue under the emergent and special conditions and in poverty-stricken areas is solved well.

The invention discloses a backwashing sewage lifter and a use method thereof. The backwashing sewage lifter comprises a closed water collecting tank and a control cabinet; at least two sewage liftingcircuits are arranged in the water collecting tank; each sewage lifting circuit comprises a terminal main pump and a lifting channel; one end of each lifting channel is connected with the output end of the main pump, and the other end of each lifting channel is communicated with a water inlet and a water outlet; water inlet check valves are arranged between the water inlets and the lifting channels, and water outlet check valves are arranged between the water outlets and the lifting channels; when the water level in the water collecting tank reaches the starting water level of one of the mainpumps, the control cabinet controls one of the main pumps to start to discharge water, back washing is carried out on the corresponding sewage discharge lifting circuit, water inflow is stopped or water inflow is carried out from the other sewage discharge lifting circuit; and when the water level is reduced to be lower than the starting water level of one main pump, the control cabinet controls one main pump to stop running. Compared with a traditional sewage pool and a lifting device, the backwashing sewage lifter has the beneficial effects of no blockage, no precipitation, no cleaning and no pollution, and the reduction of the occupied area.

The invention discloses an electric water heater with water purification function, which comprises a heating device with a water inlet pipe and a water outlet pipe, and also includes a water purification device arranged at the water inlet pipe. The main pipe and the side pipe, the side pipe is provided with a purification filter, and one end of the main pipe is connected with the side pipe through a waterway reversing valve, or the main pipe and the side pipe are respectively provided with a waterway switch. The water purification device has two water flow channels, one of which is provided with a purification filter, so that the bath water can be selectively purified, effectively purifying the water quality, delaying the formation of scale and ensuring the health and safety of the bath water. At the same time, it is more flexible, effectively prolonging the service life of the filter element and reducing the cost of water purification. At the same time, the water purification device of the electric water heater also has a backwash function, which further ensures the filtration efficiency and water flow of the filter element. The invention also provides a water quality purification method for the electric water heater.

The invention relates to an MBR membrane assembly testing device. The MBR membrane assembly testing device is used for flux test of an MBR membrane assembly, and comprises a main box body, a test control system arranged in the main box body, a sewage pool formed on the main box body and used for receiving external sewage, a clean water pool and a sewage overflow pool used for receiving excessive sewage in the sewage pool, The MBR membrane assembly testing device also comprises a MBR membrane assembly body fixed in the sewage pool, a water production system and a backwashing system respectivelycommunicated with the clean water pool and two ends of the MBR membrane assembly body, and a water supplementing system respectively communicated with the sewage pool and the sewage overflow pool.During water production operation, sewage in the sewage overflow pool is refluxed into the sewage pool through the watersupplementing system, and water production, backwashing and water replenishing operation of the water production system, the backwashing system and the water supplementing system are all controlled by the test control system. According to the technical scheme, the attenuation rate of the flux of the MBR membrane assembly can be accurately measured under the condition of long-time operation, the accurate effective working duration is obtained accordingly, and the effective working duration of the MBR membrane assembly body can be prevented from being shortened.

The invention belongs to the technical field of chemical production equipment and relates to filtering equipment for realizing separation of a catalyst in production of polytetramethylene ether glycol. The filtering equipment comprises an upper barrel body and a lower barrel body which are in sealed connection, wherein a pipe plate is fixedly connected with an inner wall of the lower barrel body; the upper surface of the pipe plate is fixedly connected with a filter element; a first polytetrafluoroethylene gasket is arranged between the filter element and the pipe plate; a pressing plate is arranged at the upper part of the filter element; a plurality of screw rods which vertically and upward extend are fixed on the pipe plate; upper ends of the screw rods penetrate through corresponding through holes in the pressing plate, and springs sleeve the upper ends of the screw rods; the lower ends of the springs are tightly pressed on the upper surface of the pressing plate; and the upper ends of the springs jack against the bottom surfaces of nuts on the screw rods. When the filtering equipment works, the filtering equipment works stably, and the utilization efficiency of the filter element is greatly improved.

The invention relates to a drainage system of a housing construction site and a use method. The drainage system comprises a foundation pit, wherein the foundation pit is formed in the construction site, a plurality of water seepage pipes which surround the foundation pit are inserted in the construction site, the bottom ends of the water seepage pipes communicate with a water suction pump which is arranged on the construction site in advance through water suction pipes which are arranged in advance, and the peripheries of the tops of the water seepage pipes communicate with a water injection pump which is arranged on the construction site in advance through water injection pipes which are arranged in advance; a plurality of groups of water seepage holes which are arranged at intervals are formed in the peripheries of the bottoms of the water seepage pipes and are obliquely coiled on the peripheries of the water seepage pipes in the length direction of the water seepage pipes; and plugging pipes which are attached to the inner walls of the water seepage pipes are rotatably embedded in inner cavities of the water seepage pipes, driving assemblies which are used for driving the plugging pipes to rotate are arranged in the inner cavities of the water seepage pipes, avoidance holes which extend in the length direction of the plugging pipes are formed in the plugging pipes, and the avoidance holes can be aligned with any group of water seepage holes in the process of rotating along with the plugging pipes. According to the drainage system, the construction difficulty in the foundation pit can be reduced, and the condition of collapse of the side wall of the foundation pit is reduced.

The invention discloses a copper valve for backwashing filter, which comprises a casing, a conduit is arranged in the middle of the casing, the conduit is arranged through the inside of the casing, and is fixedly connected with the casing, The end of the conduit is provided with a magnetic isolation net, and the magnetic isolation net is covered and arranged on the guide tube, and is fixedly connected with the conduit by screws. The bottom of the magnetic isolation net is provided with a fixed block, and the fixed The middle position of the block is provided with a sewage discharge key, which is embedded in the fixed block and fixedly connected with the fixed block. The bottom end of the sewage discharge key is provided with a differential pressure key, and the differential pressure key A ventilation hole is provided at the bottom of the ventilation hole, a pressure gauge and a water outlet are provided on the opposite side of the ventilation hole, and a water inlet is provided at the bottom of the water outlet. Equipped with a cleaning valve, it is convenient for the user to flush the shell and reduce the maintenance cost.

The invention discloses an open-hole horizontal well bottom reverse packing multi-layer sand control tubular column to meet the increasing demand for open-hole horizontal well sand control technologies. The technology comprises two trips of tubular columns - a retention well sand control tubular column and a packing service tubular column, a mean of bottom reverse pack is adopted, gravel pack of all layers can be achieved in one trip of packing service tubular column, packing compaction is good, construction layers and positions are numerous, operation is simple, and reliability is high. According to the open-hole horizontal well bottom reverse packing multi-layer sand control tubular column, the technical problem that bottom reverse packing multi-layer sand control cannot be achieved in the existing sand control tubular column is solved; through a bottom-up packing mean, the technical advantage of the bottom reverse packing multi-layer sand control is fully developed, and a packing interval is long, packing compaction is good and construction reliability is high; the packing jobs in all positions can be achieved through one trip of packing service tubular column, and the functions of a squeeze packing and a circulating packing are provided; the technical problem that a horizontal well multi-layer squeeze packing cannot be achieved in the prior art is solved.

The invention relates to a device and a method for preventing a feeding valve of a ceramic filter from being blocked, which comprises a main pulp pipeline, a distribution barrel, a mixing barrel, the feeding valve and the ceramic filter. Pulp of the main pulp pipeline enters the distribution barrel which distributes the pulp to one or a plurality of mixing barrels, and each mixing barrel is connected with each ceramic filter through a pipeline. The feeding valve is disposed on the pipeline and divides the pipeline into a feeding valve front section pipeline and a feeding valve rear end pipeline. Mineral powder accumulated in the feeding valve, the feeding valve front section pipeline and the feeding valve rear end pipeline is washed and dredged through a backwash device. Due to the fact that after the backwash device and the method are arranged, the blocked valve pipeline of the ceramic filter can be directly washed without stopping other ceramic filters and mixing barrels, production efficiency is greatly improved.

The invention discloses an energy-saving water purifier with a backwashing function. The energy-saving water purifier comprises a PP cotton filter element 1, a front activated carbon filter element 2, an ultrafiltration membrane filter element 3, a nanofiltration membrane filter element 4, a rear activated carbon filter element 5, a backwashing part 6, a fixed frame part 7, a water outlet part 8, a connecting pipe 9 and a blow-down valve 10; the backwashing part 6 comprises a booster pump 61, a three-way connected ball valve 62, a water storage pressure barrel 63 and a fixing nut 64; the fixed frame part 7 comprises a fixed bracket 71 and a fixed frame 72; and the water outlet part 8 comprises a concentrated wastewater / sewage outlet 81, a domestic water outlet pipe valve 82, a domestic water outlet pipe 83 and a drinking water outlet 84. Compared with a traditional water purifier, the water purifier has the advantages that the energy consumption can be effectively reduced, the service life of the membrane is prolonged, the use cost of water purification is reduced, ions in water can be selectively removed, and the backwashing function is achieved; the integrated design is adopted, the use space is saved, maintenance is convenient, the operation and maintenance cost is low, the effluent quality is stable, and the service life is long.

The invention relates to a back-flushing pre-filter, which comprises an outer protective cover and a filter body arranged in the outer protective cover. The outer protective cover consists of a manualvalve handle, a plastic shield, a first plastic sheath, an adjustable decorative ring, a second plastic sheath and an external blow-down valve handle from top to bottom in order. The filter body includes a valve body component, a transparent cup cover, a filter component and a blow-down valve component. The valve body component includes a valve main body and a main body valve core set in the valve main body. The manual valve handle is set at the top of the valve body component, linkage with the main body valve core can be realized by rotating the manual valve handle, and linkage with the blow-down valve component can be realized by rotating the external blow-down valve handle. A water inlet and a water outlet are respectively disposed on the left side and right side of the valve main body, and extend out of the outer protective cover respectively. When the filter body is in a normal working state, the main body valve core inside is in an off state, and when the main body valve core rotates by 180 degrees, the filter body can be in a back-flushing state.

The invention provides an ultramicro sewage filter with backwashing function and a method of the ultramicro sewage filter. The ultramicro sewage filter with the backwashing function comprises a pressure container, wherein at least one filter element is arranged in the pressure container, a water inlet is arranged on the top of the pressure container, and a water outlet connected with the filter element is arranged on the bottom of the pressure container. The ultramicro sewage filter with the backwashing function has the beneficial effects of low operating cost, good reliability, wide application and high cost performance. Under the condition that the incoming water contains suspended matter above 2000ppm, after testing, the outgoing water contains suspended matter below 1ppm, and therefore, the ultramicro sewage filter with backwashing function has high separation precision.

The invention discloses a multi-filter element filter. A motor is installed on the top cover of a multi-filter element filter with a support. The lower end of the seal rotates through the filter element mounting plate and connects a backwash pipe that rotates with the rotating shaft downwards with a tee in the middle of the liquid inlet chamber. A backwash pipe is connected to the bypass of the tee, which can be used with any filter element connection hole on the mounting plate. The bypass pipe connected to the suction cup is connected to the lower end of the backwashing pipe with a blowdown valve connected to the outside of the lower end head, and a manual blowdown valve is installed on the other side of the blowdown valve on the lower head. A control cabinet is installed on the outer wall of the filter housing, a differential pressure sensor is installed on the outer wall of the filter housing above the liquid outlet pipe, and an exhaust valve communicating with the inside of the filter housing is installed on one side of the top cover. With backwashing function, it can effectively improve work efficiency and reduce maintenance amount and cost.

The invention discloses a recycling and reusing device for residual slurry capable of being used for a laminated slab. The recycling and reusing device comprises a workshop residual slurry storage barrel, a residual slurry homogenizing and metering barrel and a mixing plant residual slurry barrel; a residual slurry pump is arranged in the workshop residual slurry storage barrel, and the residual slurry pump is connected into the residual slurry homogenizing and metering barrel through a first pipeline; and the interior of the residual slurry homogenizing and metering barrel is connected to the interior of the mixing plant residual slurry barrel through the residual slurry pump and a second pipeline. According to the device, after an additive and water are proportioned in the residual slurry homogenizing and metering barrel andare stirred until the proportion is qualified, the residual slurry is pumped into the mixing plant residual slurry barrel, a mixing plant controls the residual slurry to automatically flow into a water metering hopper according to the proportion, and the residual slurry is fed into a stirrer to be knocked after being metered properly, so that by all steps and stirring by all barrels, the quality of the overall recovered residual slurry is very high, and the residual slurry recovered by the device can be applied to the production of the laminated slab, the cost is effectively saved, and the environmental protection pressure is relieved.