44results about How to "Save backwash water" patented technology

The present invention discloses a volume-variable solid-liquid separating device with functions of sewage capturing and dirt accepting, and a separating method thereof. The solid-liquid mixture to be separated flows(down-to-up or up-to-down) through the filtering medium which is compressed to have a height equal to 60% to 90% of the natural filling height. With the increase of captured solid phases, a shaft lifting driver drives a lifting shaft to lift a compress screen, and the height of the filtering medium increases gradually. When the height of the filtering medium reaches 90% of the natural filling height, the compress screen is lifted to the highest position, the filtering medium is loosened completely, at the same time, reverse flushing gas is charged from the intake pipe for a period of 10 to 15 minutes, after the reverse flushing, the compress screen is lowered to compress the filtering medium for refiltration. As a result, the invention has a fast filtering speed reaching a level of 45m / h, sewage capturing speed is increased while the pressure drop loss is decreased; the reverse flushing is complete while the water consuming is less; the operation is simple, and complete auto-control can be realized.

The invention discloses a high-efficiency desulfurization waste liquor salt extraction recycling device. The device comprises a two-stage filtering device formed by connecting two micro-porous ceramic filtering devices with each other, wherein each micro-porous ceramic filtering device comprises a tank body (5) and a seal head (1); a liquid inlet (6) is formed in the lower part of the tank body; a liquid outlet (8) is formed in the upper part of the tank body; a backwash opening (9) is formed in the liquid outlet; a supporting disc (2) is arranged in the tank body; liquid outlet holes (19) are formed in the supporting disc at intervals; limiting sleeves (3) are fixedly arranged on the lower bottom surface of the supporting disc at intervals; the limiting sleeves are tightly connected with the outer diameters at the upper ends of micro-porous ceramic pipes in a matched mode; the micro-porous ceramic pipes are connected with a pressing plate (13); a riding fixing rack (18) is fixedly arranged on the supporting disc; and pull rods (15) through which the micro-porous ceramic pipes can be fixedly arranged on the supporting disc in a suspended mode at the intervals are arranged between the riding fixing rack and the pressing plate. According to the device disclosed by the invention, the occupied space can be reduced, the construction cost is saved, the filtering effect of desulfurization waste liquor can be improved, desulfurization liquor is conveniently filtered, and the backwash is conveniently performed.

The invention belongs to the field of water production, and relates to a mixed bed regeneration improvement process, a system and application. The process comprises air scrubbing, backwashing pre-layering, primary drainage, alkali feeding failure, backwashing layering, standing, secondary drainage, pre-injection, acid and alkali feeding, replacement, after-replacement drainage, regeneration mixing, regeneration irrigation, regeneration forward washing, and operation. The backwashing effect is enhanced by compressed-air scrubbing, so that the resin is fully loosened. The subsequent backwashingis facilitated. Meanwhile, in the alkali feeding failure step, the alkali feeding mode is adjusted, a positive discharge valve is changed into a middle discharge valve, alkali can fully and only exchange with upper-layer anion resin, meanwhile, a small amount of upper-layer cation resin fails, the alkali feeding time is shortened, the alkali consumption can be reduced, and the regeneration effectis improved.

The invention discloses a novel denitrification deep bed filter tank reaction system. The novel denitrification deep bed filter tank reaction system comprises a denitrification deep bed filter tank composed of a water inlet system, a biological filter material, sewage special-purpose water distribution gas distribution filter bricks, a gas water distribution chamber, a water outlet pipe, a backwashing system, and a carbon source adding system; a plurality of functions are achieved; a plurality of purposes can be achieved using one tank; synchronous removing is adopted to reach TN, SS, and TP three water quality index standards; the quality of discharged water is better than first grade A discharge standard or special discharge value limit standard in <Discharge standard of pollutants for municipal wastewater treatment plant> (GB18918-2002); incomplete denitrification at winter low temperature conditions is avoided; adding of a certain amount of carbon source into the denitrification deep bed filter tank plays an important role in stable reachment of TN standard, and TN discharge standard which is gradually strict in the further is achieved, and TN is ensured to be equal to or lower than 8mg / L.

The invention relates to a gas-water backwashing rapid filter tank based on modification of a siphon filter tank. A pneumatic pull plate valve is used and an air impact system is additionally arranged; a siphon filter tank only having a water flushing mode is modified into a gas-water combined backwashing efficient intensive filter tank. The filter tank comprises a water inlet pull plate valve arranged in a water distribution channel, a water outlet / water flushing pull plate valve arranged on a transverse partition plate of a clear water channel, a drainage pull plate valve arranged on the outer side tank wall of the filter tank, and an overflow pull plate valve arranged on an overflow weir wall at the tail end of the clear water channel of the filter tank, a flushing water head is formedthrough coordination and cooperation between the pneumatic pull plate valves to perform filter tank water flushing operation without a back flushing pump, so that process equipment is simplified. Herein, by adding the air flushing system, air-water combined backwashing of the filter is realized, and the operation efficiency of the traditional siphon filter is improved, the operation effect of thefilter tank can be remarkably improved, the operation period of the filter tank is prolonged, the operation cost is reduced, and certain popularization and reference values are achieved for siphon filter tank transformation of medium and small water plants.

The invention relates the method of producing filtering material used in bio-aeration filter tank. The highly effective biology filtering material comprises 70wt%-90wt% red earth ore and 10wt%-30wt% coal ash. The filtering material is out-of-shape, and the grain diameter is between 3mm and 8mm. The method comprises the following steps: breaking the 70wt%-90wt% red earth ore, drying at 130Deg.C-170Deg.C; fetching 10wt%-30wt% coal ash; fetching 5wt%-15wt% pore-forming agent, water content being below 3%, mixing them, adding water to form ball, drying, calcining, at 1050Deg.C-1250Deg.C, cooling, breaking, barreling and screening until the grain size being 3-8mm. The invention has the advantages of macroporous structure, rough surface, proper void ratio and large specific surface area. Every property is satisfied for the request of bio-aeration filter tank filtering material.

The invention provides a back-flushing cutting module for a ceramic bio-filter and a three-dimensional back-flushing technology of the back-flushing cutting module. The adopted three-dimensional back-flushing technology is realized mainly by depending on the back-flushing cutting module. The back-flushing cutting module for a ceramic bio-filter comprises a cutting framework, a cutting skeleton, asecond back-flushing water inlet pipe, a second back-flushing water inlet branch pipe, a rotating shaft, a frame plate and a transmission motor, wherein the transmission motor drives the back-flushingcutting module to perform transverse filter material cutting through horizontal rotation of the rotating shaft; and the ceramic bio-filter performs longitudinal back-flushing upwards through back-flushing water which enters through a first back-flushing water inlet pipe. The three-dimensional back-flushing technology adopting three process of a 'independent gas back-flushing mode' to a 'gas-watercombined back-flushing mode' to a 'dependent water three-dimensional back-flushing mode' is provided, so that sufficient friction and movement of a filter material on a longitudinal face and a transverse face are performed, and accordingly, the bio-filter is radically prevented from blockage and caking of the filter material.

The invention belongs to the technical field of sewage processing up-to-standard discharging and recycling, and especially relates to a sea water, fresh water culture tail water processing up-to-standard discharging recycling system. The sea water, fresh water culture tail water processing up-to-standard discharging recycling system comprises a phosphorus removing water tank, a filter, and a smallmolecule sterilizer; the phosphorus removing water tank is connected with the filter through a first water pipe; a filtering structure is arranged in the filter; the filtering structure is connectedwith the small molecule sterilizer through a fourth water pipe; the filtering structure comprises a plurality of filter cores; each filter core comprises an outer sleeve; each outer sleeve is sleevedwith cylindrical filter cloth; an inner tube is sleeved by each outer sleeve; the side surface of each inner tube is provided with water flow holes. According to the sea water, fresh water culture tail water processing up-to-standard discharging recycling system, simple technology equipment is adopted to realize technical improvement of a conventional culture system, sea water and fresh water fishculture industry structure restructuring is promoted, limit water resource is saved, pollution of aquatic product culture on the environment is reduced, and active promotion effect on development offish culture industry with high requirements on water quality is achieved.

The invention relates to a denitrified deep bed biological filter tank, which comprises a tank body of a flocculation sedimentation tank which is divided into four groups of sedimentation tanks. The invention is characterized in that tank walls are additionally installed at the central position of the front part of each group of the sedimentation tank to form eight groups of filter tanks, a collecting tank is provided at the bottom of the filter tank, a cover plate is provided on the collecting tank, an interval part capable of penetrating water is provided between the cover plate and the collecting tank, an aeration head and an aeration pipe are uniformly distributed on the cover plate, a gas and water distribution block is additionally installed on the aeration pipe, a distribution tank is additionally installed at the upper part of each group of the filter tank. The invention has the advantages that the land occupation is less, the filter tank can be taken as the deep bed filter tank or the denitrified deep bed biological filter tank for removing SS, TN and TP. According to the invention, the gas and water distribution is employed; the water distribution and the gas distribution are uniform, maintenance-free for lifetime in the filter tank is provided. The water volume for backwashing is little with 4% and no exceeding of 2% generally. The filling material uses quartz sand which possesses hard quality, no loss or damage can be generated, no replacement is required. The standard of urban reclaimed water can be reached, and the water from the filter tank of the invention can be reused as wash water for plant area greening and road flushing.

The invention discloses a new biological filter tank process and a new biological filter tank, the new biological filter tank includes a filter tank, a backwash water pipe located at the bottom side part of the filter tank, a water intake canal located above the filter tank, an effluent weir located below the filter tank, and a filter material; all the filter material is separately put into a plurality of liftable filter material boxes, the filter material boxes vertically separate a filter bed into a plurality of layers, the plane of the filter bed is also can be divided into a plurality of cases and one overall case according to the need of practical engineering, a water swelling material is arranged between the periphery of the filter material boxes and the filter tank, a compressible and stretchable rigid frame is arranged in the swelling material; the filter material size gradually decreases along the filtering water flow direction, and enough spare height is left above the filter material in the filter material boxes. The new biological filter tank can solve many technical problems of high backwash difficulty, easy blockage or hardening, high backwash frequency, high backwash water consumption, f large power consumption, high effluent SS (suspended solids) and the like of filter tanks in the prior art.

The multifunctional sea water purification equipment comprises the purification pool and filter material placed in the purification pool, and the described filter material is formed from several pieces of water-cleaning clohtes which are parallelly sepaced and suspended, and the purification pool is divided into several purification filtering chambers by means of water-cleaning clothes. Said water-cleaning cloth has a row of vertical gaps which are cut according to a spaced width, and its two end portions and middle portion are equipped with connecting portion with a certain width, said water-cleaning cloth is a punched non-woven fabric, and its specific surface area is above 2000 sq.m / cu.m. Its purification process includes: fish farming pool, air float pool, multifunctional sea water purificiation equipment, oxygen-dissolving tank and fish farming pool.

The invention discloses a backwashing method of a filter, which solves a problem of low backwashing efficiency of traditional filters, a specific method is that a whirl cavity, a water collection cavity, a filtering medium collection and transfer cavity and a discharge cavity are all installed in the filter, so that a mixed liquor generates a strong centrifugal separation acting force after passing through the whirl cavity, the acting force results in not only applying a rubbing force on the filtering medium, but also effectively separating the filtering medium from oil and suspending impurities through their channels, namely, the oil and the suspending impurities are discharged from a tank via the water collection cavity, the washed filtering medium is sequentially returned back to the tank via the collection and transfer cavity and the discharge cavity, repeating in this cycle, the filtering medium can be completely washed; the invention also provides a device capable of implementing the method.