68results about How to "Backwashing is easy" patented technology

The invention discloses a produce method for concavo-convex bar ceramsite filtering material. Wherein, the said filter material comprises concavo-convex bar clay, coal gangue and volcanic ash, and is produced by burdening, milling, granulating, baking, screening and packaging. The filter material has rough surface, well bonding film property, small flow resistance, and well stability and adsorption properties. This invention needs low cost and baking temperature, can save much energy, has no secondary pollution and fit to water purification treatment.

The invention relates to an integrated A/O bacteria filter device for treating dispersed wastewater, which has a cylindrical structure in shape. The center of the integrated A/O bacteria filter device is provided with a cylindrical erect flow primary settling tank, a baffle wall is arranged between an inner cylinder body and an outer cylinder body, and a space is divided into an adjusting tank, a hypoxia bacteria filter, an aerobe filter, a clear water tank and a mud storage tank. The aerobe filter and the clear water tank are in a concentric circle arc structure. Wastewater in the adjusting tank is lifted into the primary settling tank through an air lifter, the settled wastewater and recycled nitrification liquor are together distributed into the hypoxia bacteria filter for denitrification, the bottom and the middle part of the hypoxia bacteria filter are provided with backwashing pipelines which can realize subsection washing; the hypoxia bacteria filter is communicated with the bottom of the aerobe filter, the denitrified wastewater overflows from the surface into the clear water tank for outputting after organic matters are removed and nitrification is carried out in the aerobe filter. The backwashing wastewater of the device flows into the adjusting tank per se, and mud in the primary settling tank is lifted into the mud storage tank through the air lifter. The invention has the advantages of less investment, little operation cost, longer mud discharge period and convenient management, thereby being suitable for treating the dispersed wastewater in countryside.

The invention relates the method of producing filtering material used in bio-aeration filter tank. The lightweight and highly effective biology filtering material comprises 65wt%-80wt% red earth ore, 10wt%-30wt% coal ash and 5wt%-15wt% pore-forming agent. The method comprises the following steps: breaking the 65wt%-80wt% 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 relates to a process for preparing a porous functional ceramic material. The process comprises the following steps: 1) activating treatment of the porous ceramic material, namely soaking the porous ceramic material into a mixed solution of a dilute acid and hydrogen peroxide, of which the concentration is 0.1-15%, placing for 0.1-2 hours under the condition at 20-90 DEG C, and then drying for 10-120 minutes under the condition at 100-200 DEG C; 2) preparation of mother liquor, namely taking 1-50ml of silane coupling agent to 100ml of absolute ethyl alcohol, and then adding 1-10% of water and 0.1-2ml of acetic acid (HAC), placing for 0.1-3 hours at 20-80 DEG C; and 3) surface modification reaction. The porous functional ceramic material disclosed by the invention is simple in preparation technology, and the raw materials are subjected to modification treatment, so that the original hydrophily of the material is converted into strong hydrophobicity (lipophilicity), the water contact angle exceeds 120 degrees, the material has an ultra-strong adsorbing effect on oil, and has the characteristics of being easy for backwash after the oil is absorbed, and the prepared porous functional ceramic material can be widely applied to fine filtration treatment of an oily wastewater generated in the industries such as petrifaction, smelting and medicines.

The invention discloses a cold and heat source revolution type dual-prevention device for sewage or surface water and a system thereof and relates to a device for preventing blocking and scaling while extracting cold and heat in sewage or surface water by utilizing a heat pump technology and a system thereof, belonging to the technical field of energy and aiming to effectively solve the problem of heat exchange equipment blockage by impurities in the sewage or the surface water and on how to reduce the growth thickness of dirt in the heat exchange equipment. The device comprises a shell, a valve body, a scraper, a filter piece 1, a filter piece 2, a water inlet, a water outlet, two connecting ports, a rotating component, and the like. The system comprises a heat pump set, the device, a connecting pipeline, and the like. When one filter piece works, the other filter piece is used for back washing, the rotating component intermittently changes the direction of the valve body to ensure that the two filter pieces are used for alternately filtering and back washing, and filtered sewage or surface water enters the heat pump set or the heat exchange device again to carry out cold and heat exchange. The invention is suitable for a cold and heat source system of the sewage or the surface water.

The invention discloses a method of preparing liquid ferrous chloride for water treatment by taking waste hydrochloric acid as a raw material. The method comprises the following steps: firstly, controlling content of ferrous chloride to be not lower than 20wt% in the waste hydrochloric acid and controlling the content of free aid to be not greater than 5wt%; secondly, exhausting the waste hydrochloric acid into an acid storage tank, standing and precipitating for 24-48 hours; extracting the waste hydrochloric acid at the upper layer of the acid storage tank again and conveying the extracted waste hydrochloric acid to a filter tank to filter; and finally, detecting content of acid non-soluble substances in filtered waste hydrochloric acid, and collecting the obtained waste hydrochloric acid, namely qualified liquid ferrous chloride product for water treatment when the content of the acid non-soluble substances in the waste hydrochloric acid is not greater than 0.5wt%. The method is low in energy consumption for treating the waste hydrochloric acid, low in cost, high in efficiency, convenient to operate, good in applicability, capable of utilizing products produced by waste hydrochloric acid treatment secondarily and high in economic value.

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 composite-method oil removing apparatus which employs composite principles of aggregation and oleophobicity, belonging to the technical field of oil-water separation and filtration. The apparatus comprises a water inlet, a water inflow chamber, an oil collecting chamber, a floating oil chamber, an oil outlet, an oleophobic chamber, a shell, a drain outlet, a clear water chamber and a water outlet, wherein raw water enters into the water inflow chamber from the water inlet, impurities in the water deposit on the bottom of the water inflow chamber and are discharged from the drain outlet, then the water enters into the oil collecting chamber, an oleophylic and oil-accumulating material is disposed in the oil collecting chamber, dispersed oil in the water is aggregated to form large-grained oil droplets which enter into the floating oil chamber, the water in the lower part of the floating oil chamber enters into the oleophobic chamber, an oleophylic and oil-separating material is disposed in the oleophobic chamber to further obstruct residual oil in the water, obtained clear water enters into the clear water chamber and is discharged from the water outlet, and floating oil is discharged from the oil outlet. The composite-method oil removing apparatus provided by the invention can realize backwashing, removes impurities and oil without addition of additives and guarantees that the properties of original liquid maintain invariable; and usage of a plurality of the oil removing apparatuses in series connection enables oil to be thoroughly removed, so the oil removing apparatus has wide market prospects.

The invention discloses a water filter unit and a filter method thereof, the water filter unit comprises a first filter tank and a second filter tank, wherein a first water discharging hole of the first filter tank is connected with a three-way valve and then respectively communicated with a washing hole and a water discharging pipe of the second filter tank, a first water discharging hole of thesecond filter tank is connected with the three-way valve and then respectively communicated with a washing hole and a water discharging pipe of the first filter tank, second water discharging holes oftwo filter tanks are communicated with the water discharging pipes, water feeding holes of two filter tanks are communicated with each other and then communicated with a water feeding pipeline, and sewage draining exits of two filter tanks are communicated with each other and then communicated with a sewage draining pipeline; two filter tanks of the water filter unit can complete the filter independently and can also backwash the filter element of the other at the same time of filter, and the backwashing is simple and the filter efficiency is greatly enhanced.

The present invention discloses a method for high-effectively extracting and separating nano-grade substance from solution and its equipment, belonging to the field of substance extraction and separation technology. Said equipment includes coarse filtration system, fine filtration system, ultrafiltration system, negative pressure suction system, back-flushing system and whole system program controller.

The invention provides a high-efficiency loaded bio-membrane purification device. The device comprises a reaction tank, the internal of the reaction tank is divided into a first reaction chamber and asecond reaction chamber by a separation plate, the separation plate is provided with a through hole, the through hole divides the separation plate into an upper separation plate and a lower separation plate, a coal gangue ceramsite layer, a biological sludge ceramsite layer and a first double-layer filtration layer are sequentially arranged in the first reaction chamber from top to bottom, the coal gangue ceramsite layer and the biological sludge ceramsite layer are arranged in an interlaced manner, a nano-modified ceramic layer, a porous sponge layer and a second double-layer filter layer are sequentially arranged in the second reaction chamber from top to bottom, movable plates are hingedly connected to two sides of the lower separation plate, the movable plates and the lower separationplate are connected by compression springs, L-shaped limiting grooves are symmetrically arranged at one sides, close to the lower separation plate, of the first double-layer filter layer and the second double-layer filter layer, and the free ends of the movable plates are located in the L-shaped limiting grooves. The device has a biodegradation function and a good sewage treatment effect.

The invention relates to single-pipe external-compression type mechanical-circulation forced-cross flow solid and liquid-separating dynamic membrane system and device. The dynamic membrane device comprises a tubular external-compression type supporter with a large-hole diameter net, a shell arranged at the outer side of the tubular external-compression type supporter, a plurality of supports, a raw water inlet and a plurality of purified water outlet tubes, wherein the inner part of the shell and the outer part of the tubular external-compression type supporter form a water inlet chamber, and the supports are arranged between the tubular external-compression type supporter and the shell at intervals and are respectively sheathed with the tubular external-compression type supporter and the tubular external-compression type supporter; the raw water inlet is connected to the lower end of the shell and is communicated with the water inlet chamber; and the purified water outlet tubes penetrate through the shell and are communicated with the inner cavity of the tubular external-compression type supporter. The dynamic membrane device also comprises a cross-flow backflow water outlet which is connected to the upper end of the shell and is communicated with the water inlet chamber. The dynamic membrane device has the advantages of no waterpower blind angel, short precoating time, convenient back washing, continuous working, improved membrane flux, stable water yield and long working period.

The invention relates to a filtering material for removing iron and manganese from water, and a manufacturing method thereof. The invention is characterized in that the filtering material is made by using irregular polyhedral filtration particles, which are obtained by crushing and screening building ceramic particles and of which the surfaces have pores, and by making an adhesive layer containing ferric oxide and manganese on the surfaces of the filtration particles by using a chemical or coating method. The filtering material has a large specific surface ratio, a small specific gravity and good physical and chemical properties and can be manufactured by a simple and convenient method. The water iron and manganese filtration effect of the filtering material is better than that of natural manganese sand, so the filtering material has a promising market application prospect.

The invention specifically relates to a sewage treatment biological filter material based on low-voltage electric porcelain waste and a preparation method of the sewage treatment biological filter material. According to the technical scheme, the method includes the first step of using 40.0-60.0 wt% of the low-voltage electric porcelain waste, 15.0-25.0 wt% of coal ash, 10.0-20.0 wt% of pyrophyllite and 5.0-15.0 wt% of clay as raw materials, adding 500-1000 L of pore-forming agents into per ton of the raw materials, conducting mixing, further adding 2.0-5.0 wt% of binding agents and 15.0-25.0 wt% of water, and then conducting pelleting forming, and the second step of conducting drying for 24-48 hours at the temperature ranging from 80 DEG C to 140 DEG C, conducting heat preservation for 2-12 hours at the temperature ranging from 800 DEG C to 1200 DEG C, and finally obtaining the sewage treatment biological filter material based on the low-voltage electric porcelain waste. The method has the advantages of being simple in process, capable of saving resources and friendly to the environment. Products manufactured through the method are large in specific surface area, high in mechanical strength, good in wear resistance and high in apparent porosity.

The invention discloses a water treatment device comprising circular pipe filling and a use method and belongs to the technical field of water treatment. The water treatment device comprises a tank body reaction system, a gas distribution system and a water distribution system, wherein gas is supplied to a gas distribution pipe via adjustment and opening of an aeration pipe, the gas distribution pipe and a pulse pipe in a gas distribution area; the pulse pipe is connected with a gas storage tank from a high pressure fan via an adjustment valve; an outlet is connected with the pulse pipe via areducing valve, an electromagnetic valve and an adjustment valve; the circular pipe filling is 3-6mm in outer diameter D, 10-30mm in length L, 0.5-1mm in pipe wall thickness h and 1.05-1.2g/cm<3> in density rho; U-shaped notches are formed at the two ends of circular pipes; and the circular pipes are made from PVC (polyvinyl chloride). An operating state of the filling can be changed by adjustinga gas distribution valve according to influent quality. The device is used for biochemical sewage treatment and has a good synchronous treatment effect on C, N and P; the working state of the fillingcan be adjusted according to different C/N ratios; back flushing is easy and low in energy consumption; the possibility of blocking is low; the surface area per unit volume is large; and the device issimple to manufacture.