35results about How to "Guaranteed backwash effect" patented technology

The utility model relates to an urban sewage hydraulic self-cleaning device provided with a roller grill, which relates to an improvement of a device which utilizes urban sewage to provide energy. It consists of a sewage suction pipe (2), a sewage return pipe (3), a sewage lifting pump (4) installed on the sewage suction pipe (2) and a decontamination device (5). The sewage suction pipe (2) The water suction port (6) and the return port (7) of the sewage return pipe (3) are arranged in the main sewage canal (1), and the other end of the sewage suction pipe (2) and the sewage return pipe (3) is provided with a decontamination device (5), the decontamination device (5) consists of a housing (8), a cylindrical grid filter (9) and a transmission device (10) that drives the rotation of the cylindrical grid filter (9) , the inside of the housing (8) is divided into a water supply area (11) and a return water area (12), and the cylindrical grille filter (9) divides the water supply area (11) into the inner water supply area (11-1) and The water supply area (11-2) outside the tube, the backwater area (12) is divided into the backwater area (12-1) inside the tube and the backwater area (12-2) outside the tube by the cylindrical grid filter (9) . The invention has the advantages of small occupied area, low cost, simple equipment and wide application range.

The invention discloses an upward flow heterogeneous filter material filter tank, which comprises a filter tank body, the bottom of the filter tank body is divided into a water distribution and gas distribution space at the bottom and an upper filter tank by a partition board, and multiple filters are installed on the partition board A long-handle filter head connects the water distribution and air distribution space with the filter tank. The bottom of the filter tank is a support layer, and the upper part of the support layer is a filter layer. Above the filter material layer is a water outlet along the length of the filter. The outlet channel on one side of the filter is connected, and the other side symmetrical to the filter tank and the outlet channel is provided with a water inlet branch channel. The bottom of the water inlet branch channel is provided with a water inlet pipe. The outlet end of the water inlet pipe is connected with the water distribution and air distribution space. The filter material layer and The supporting layer is filled with filter material, and the filter material is a heterogeneous filter material, and the particle size of the heterogeneous filter material increases sequentially from top to bottom. The filter adopts non-homogeneous filter material, and the acquisition cost of the filter material is low. After backwashing, it will naturally form an arrangement of small particles at the top and large at the bottom, which is more conducive to the improvement of the filtration efficiency of the filter.

The invention discloses a river water pretreatment device. A gas sterilizing chamber, an adsorption chamber and a water collection chamber are arranged in a tank; a water distribution device is arranged in the gas sterilizing chamber, and is communicated with a water inlet, gas sprayers are arranged below the water distribution device, and are communicated with an external gas source pump by means of a gas transmission pipeline, the lower part of the gas sterilizing chamber is provided with a first flexible diaphragm, a first gas cavity is formed between the first flexible diaphragm and a bottom plate of the gas sterilizing chamber, a gas sterilizing chamber water sump is formed between the first flexible diaphragm and the sprayers, and a rotary impeller is mounted in the gas sterilizing chamber water sump; a homogeneous water pore plate is arranged in an adsorption chamber, the adsorption water sump is arranged below the homogeneous water pore plate, the adsorption chamber is filled with a plurality of lightweight porous adsorption carriers, and the lightweight porous adsorption carriers are made from activated carbon materials. The river water pretreatment device provided by the invention integrally adopts a vertical structure, is small in floor space, and suitable for transforming in an existing waterworks or building renewedly and installing, the process is simple, the operation is convenient, the energy consumption and operation cost are low, and a better river water pretreatment effect is realized.

The invention discloses a method and a system for recycling reverse osmosis concentrated water. Tap water is filtered by an ultrafiltration device (20) to obtain ultra-filtered water, the ultra-filtered water is subjected to a softening process to obtain softened water, and the softened water is treated by a reverse osmosis device (30) to obtain osmotic water and reverse osmosis concentrated water. The method comprises the steps of mixing the reverse osmosis concentrated water and the ultra-filtered water to obtain back washing water and performing back washing on the ultrafiltration device (20) with the back washing water. By adoption of the technical scheme, the reverse osmosis concentrated water and the ultra-filtered water are mixed for back washing of the ultrafiltration device, so that on the premise of guaranteeing the back washing effect on the ultrafiltration device, the reverse osmosis concentrated water is recycled and waste of water resources is avoided.

The invention discloses an aerating biological filter pool in the water disposal device domain, which comprises the following parts: filter pool within aerating device and filtering device, water inlet pipe on the bottom of filter pool, backwash drainage pipe on the bottom of filter pool, pulse air-chamber to interconnect bottom of filter pool through backwash inlet pipe and vent pipe, wherein the vent pipe lies in one end of water sealing pipe in the pulse air-chamber; the other end of vent pipe connects gas-water separator, whose top possesses connection pipe with bottom interconnecting the bottom of pulse air-chamber through connection pipe.

The invention provides a novel combined defluorinating device for underground water. The device comprises a water inlet unit, a defluorinating reaction unit, a pipe chute or cantboard separating area, an initial filter unit, a terminal filter unit, a backwashing device and an electromagnetic exhausting valve which are sequentially arranged from bottom to top, wherein the terminal filter unit comprises a central water inlet pipe as well as a stainless steel filter screen and a closed quartz sand filter layer sequentially arranged from bottom to top, the central water inlet pipe is arranged on the top of the initial filter unit at the bottom and penetrates through the middle parts of the stainless steel filter screen and the quartz sand filter layer, and the lower part of the central water inlet pipe between the stainless steel filter screen and the quartz sand filter layer is stainless steel filter cloth with the aperture of 0-0 mu m; a water collecting area is arranged at the bottom of the quartz sand filter layer, and water outlet pipes which are communicated with each other are arranged on the top of the stainless steel screen and the side wall of the water collecting area. The novel defluorinating device provided by the invention has the advantages of compact structure, small occupied area, low treatment cost, high effluent quality and the like, is convenient to change and flexible to use, and has a good popularization and application prospect.

The invention provides a loop multi-biochemical and filtration linked treatment method and a device, a cavity body of a reactor is divided into a reaction zone and a sedimentation zone, wherein, the reaction zone is sequentially divided into an aerobic zone, an anoxic zone and an anaerobic zone from top to bottom, an aerator is arranged in the aerobic zone, a water inlet is arranged at the bottompart of the anaerobic zone, liquid in the reactor generates the loop current through the density difference which is formed by aeration in the aerobic zone; at the same time, a filtration zone is arranged in or out of the reactor, communicated with the sedimentation zone by an overflow pipe and positioned below the sedimentation zone; the filtration process and the backwashing process of the filtration zone can be controlled according to the change of water level of the sedimentation zone through a liquid level travel switch and a controller which are arranged at the upper end of the sedimentation zone. The treatment method and the device fully utilize vertical spatial structure and can realize the loop multi-circulating biochemical linked treatment for removing nitrogen, removing phosphorus and degrading organic matters of sewage; furthermore, the treatment method and the device are characterized by automatic backwashing, power-free sludge reflux, less investment, small and compact device, small occupying area and convenient operation and management.