52results about How to "Short backwash time" patented technology

The invention relates to an automatic backwashing liquid-returning filter, belonging to the field of automatic backwashing filtering devices of emulsion in a coal mine. A cylinder (10) is divided into an upper part and a lower part, the inside of the cylinder (10) is divided into a liquid inlet and outlet chamber (1) and a filter chamber (2), a liquid inlet (14) and a liquid outlet (22) are bisymmetrically arranged at the upper part of the liquid inlet and outlet chamber (1), two groups of backwashing devices are correspondingly installed inside the liquid inlet and outlet chamber (1), a filter element (9) is installed in the filter chamber (2) through a shaft (42) and a bearing (43), a big nut (6) and a stop member (5) are connected to the lower end of the filter chamber (2) in threads, the stop member (5) is connected with a drainage valve (4), a backwashing pipe (27) is arranged at one side inside the filter chamber (2), the backwashing devices are connected to the upper part of the backwashing pipe (27), and a plurality of backwashing holes (38) are uniformly distributed on pipe walls. The automatic backwashing liquid-returning filter has the advantages of long service life, large filter area, strong drainage capacity, timed or automatic online backwashing and the like.

The invention discloses an air water reverse blowing and washing device used for a tubular sintered membrane filter. At least one air distribution plate is arranged in a reverse blowing and washing cavity in a shell of the filter, the air distribution plate and a filter pipe connecting plate mounted in the shell are arranged at intervals, a plurality of air distribution holes are formed in the air distribution plate, and the air distribution holes are in one-to-one correspondence and central alignment with a plurality of mounting holes formed the filter pipe connecting plate and used for fixedly mounting a sintered membrane pipe. The added air distributing plate can guide the reversely blown air flow, so that the problems that the reverse blowing and washing is not uniform or complete are solved, and no dead angle exists during reverse blowing and washing.

The invention relates to an automatic back flush and liquid absorption filter, belonging to the field of an automatic back flush filter device for an emulsion in a coal mine. In the filter provided by the invention, a barrel body (5) is divided into two parts; the interior of the barrel body (5) is divided into a liquid absorption chamber (1) and a filtration chamber (6); a liquid outlet (24) is formed on one end surface of the liquid absorption chamber (1); a back flush device is installed in the liquid absorption chamber (1); a filter element (7) is installed in the filtration chamber (6) through a bearing (29) and a shaft (28); a check valve (11) is installed at the other end of the filtration chamber (6) through a limit piece (9); the check valve (11) is connected with a control mechanism (16); a blowoff valve (4) is installed in a drain outlet (3) at one side of the filtration chamber (6); a back flush pipe is installed at one side in the barrel body (5) and between the filter element (7) and the barrel body (5); one end of the back flush pipe is connected with the back flush device, and the other end is installed in the filtration chamber (6); and multiple back flush holes (40) are uniformly distributed on the wall of the pipe. The filter provided by the invention has the advantages of large filter area, strong drain capacity, long service life, can realize timing or automatic online cleaning and the like.

The invention provides a back flush filter, relating to the field of sewage purification treatment facilities. The back flush filter comprises a shell, an electrodynamic mechanism, a coarse screen, a fine screen, a sewage suction device and a gas supply unit, wherein the coarse screen and fine screen are arranged in the cavity of the shell; the coarse screen and fine screen are respectively cylindrical, and form a back flush chamber with the inner wall of the shell; one end of the shell is provided with a sewage inlet; the upper end of the shell is provided with the electrodynamic mechanism and a purified water outlet; the lower end of the shell is provided with a drainage port; the sewage suction device comprises a drainage pipe, a high-pressure gas pipe, a sewage suction pipe and an exhaust pipe; the high-pressure gas pipe is sheathed in the drainage pipe; the sewage suction pipe communicates with the inner cavity of the drainage pipe; the exhaust pipe penetrates through the wall of the drainage pipe and communicates with the inner cavity of the high-pressure gas pipe; the exhaust pipe comprises a straight-opening pipe and a bent-opening pipe; and the gas supply unit comprises a motor, a gas pump and a gas supply pipe. The back flush filter has the advantages of high cleaning efficiency and thorough cleaning, and can satisfy the quality requirements for sewage filtration and automatic drainage.

The invention discloses a biological aerated filter. The biological aerated filter is divided into a water distribution zone and a water inlet zone, wherein the water distribution zone and the water inlet zone are arranged at intervals by virtue of a partition plate; the bottom of the water distribution zone is provided with an aeration pipe, and the aeration pipe releases oxygen to the water distribution zone; the partition plate is provided with a filter head which causes the water distribution zone and the water inlet zone to be communicated; the water inlet zone is also connected with a backwash water inlet pipe and a backwash air inlet pipe, and the backwash water inlet pipe and the backwash air inlet pipe are respectively used for water injection and air injection on the water inlet zone by virtue of valves; and a branch pipeline is arranged between the backwash water inlet pipe and the valves of the backwash water inlet pipe, and the branch pipeline is also provided with a sludge discharge pump. By applying the technical scheme of the invention, complete biological treatment can be completely achieved in one biological aerated filter while no secondary sedimentation tank used for sludge sedimentation is required to be arranged downstream; meanwhile, valves of the backwash water inlet pipe and the valves of the backwash air inlet pipe are closed, the sludge discharge pump is started, sludge gathered at the water distribution zone is reversely and forcibly discharged, then backwashing is carried out, time of the backwashing is shortened, and water yield is increased.

The invention discloses a method for optimizing the backwashing time of a membrane bioreactor. The method comprises the following steps: conducting backwashing on the membrane bioreactor, and establishing a relation curve of the backwashing time and the membrane flux of a membrane assembly; calculating the membrane flux increase rate mu of the membrane assembly, and establishing a relation curve of the membrane flux increase rate mu and the backwashing time; confirming the highest membrane flux increase rate mu1 and the corresponding backwashing time T1, and searching for the backwashing time T2 corresponding to a ratio of the highest membrane flux increase rate mu1 to a, wherein if T2 is longer than T1, T2 is the optimized backwashing time of the membrane bioreactor. According to the method, the efficiency of cleaning the membrane bioreactor is improved, the energy consumption is reduced, the damage of washing to the membrane bioreactor is weakened, and the service life of the membrane assembly in the membrane bioreactor is prolonged.

The present invention proposes an electrostatic separator and a cleaning method capable of changing the packing accumulation mode, so that the packing accumulation mode can be conveniently changed without disassembly in the electrostatic separator, and solves the problem of insufficient backwashing of the packing material in the prior art. The technical problems of low efficiency and difficult packing drying include the cylinder body, the coaxial electrode column, a number of packing plates between the inner electrode and the cylinder body, and the packing plates are equipped with assembly column insertion holes, fixed column insertion holes, and moving column Jack holes, electrode holes and filler placement holes, the fillers are arranged on the filler plate, the position of the odd-numbered plates is fixed by the fixed column, and the horizontal movement of the even-numbered plates is controlled by the moving column to change the packing accumulation method.