107results about How to "Improve backwash efficiency" patented technology

The invention relates to a ceramic dead-end filter for filtration of liquid. The ceramic dead-end filter comprises at least one ceramic filter membrane having a first side with a front surface and a second side. The ceramic membrane comprises a selective front layer providing said front surface and the selective front layer comprises a maximum pore size diameter of about μm or smaller, for example between about 0.5 nm and about 25 μm. The ceramic dead-end filter of the invention provides an effective filtration with a high flux and a long durability. The filter can furthermore be regenerated in a simple way. The invention also relates to filtration system comprising such ceramic dead-end filter, a method of performing the filtration process as well as a method of producing the filter.

A filter apparatus including: a casing including, in a sealed space provided therein, a fluid inflow chamber, a filtration chamber and a drain chamber; a filter element provided inside the filtration chamber to let a fluid pass therethrough from inside to outside to perform filtration; a backwash slide member movably provided inside the filter element and removing trapped matter adhering to an inner circumferential surface of the filter element by an inward flow generated by a difference in pressure inside and outside the filter element at the time of backwashing; a backwash pipe that lets the inward flow flow toward the drain chamber; an actuation cylinder that lets the fluid from the backwash pipe flow toward the drain chamber; and a fluid flowing unit allowing a fluid to flow, enabling a piston member to move inside the actuation cylinder.

The invention relates to a claystone-activated carbon fiber water purification and filtration system. The claystone-activated carbon fiber water purification and filtration system comprises a water conveying device, a water draining main pipe and a claystone-activated carbon fiber filtering device, wherein the water conveying device is communicated with the claystone-activated carbon fiber filtering device; the claystone-activated carbon fiber filtering device is communicated with the water draining main pipe; the claystone-activated carbon fiber filtering device is provided with a claystone-activated carbon fiber medium layer and an air-distributing structure layer respectively; the claystone-activated carbon fiber medium layer comprises three filtering layers, namely a modified bentonite filtering layer, an activated carbon fiber filtering layer and a zeolite filtering layer, which are arranged from top to bottom sequentially; a certain space is reserved above the modified bentonite filtering layer and the zeolite filtering layer; and the air-distributing structure layer is positioned on the lower part of the claystone-activated carbon fiber medium layer and is communicated with the claystone-activated carbon fiber medium layer. After breeding organic sewage is treated by the claystone-activated carbon fiber water purification and filtration system, the result shows that the removal rate of ammonia nitrogen is 42 to 48 percent, the decoloration rate is 64 to 68 percent, and good water purification effect is achieved.

A pressure sand filter is composed of cylindrical body, raw water pump and air pump. Said cylindrical body contains a lower air bag in water collecting chamber. The water collecting chamber also plays the role of back washing box and the blower plays the role of back washing pump. Its advantages are less water consumption, low cost and high water utilization rate.

The invention relates to a dust removal device, which comprises a hollow shell and a partition disposed in the shell. The partition at least divides the shell into a first chamber and a second chamber. Several ceramic filter pipes are vertically arranged side by side on the partition. The dust removal device is designed as follows: the gas flows from the first chamber to the second chamber or fromthe second chamber to the first chamber and must be filtered through a ceramic filtering structure. The ceramic filtering structure comprises the ceramic filter pipes, which comprises ceramic fiber pipes used for filtration. The two-way air passage between the inside of the pipes and the outside of the pipes is realized through several air vents on the pipe wall of the pipes. The dust removal device is arranged according to the following mode: the filtered gas that enters the second chamber can flow from at least two different levels to the several ceramic filter pipes. According to the dustremoval device, the filter resources of the ceramic filter pipes can be more fully and evenly utilized, thus enhancing the filter efficiency and being helpful for improving the backwash efficiency.

The invention discloses an ultrafiltration back flushing device for rural domestic sewage, belongs to sewage treatment (C02F), and mainly aims to solve the problems of high energy consumption, incomplete cleaning, poor flux recovery, short running period, complexity in operation management, easiness in damaging ultrafiltration assemblies and the like existing in the conventional tubular ultrafiltration back flushing device. A manual hydraulic pump is used for supplying power to the ultrafiltration back flushing device, so that a low-power and low-energy-consumption effect is achieved; moreover, a two-stage flushing mode consisting of high-level boosting manual flushing and manual hydraulic pump boosting back flushing is adopted for completely flushing a membrane tube, so that the membrane flux recovery degree is increased effectively, and the running period of a membrane assembly is prolonged. The ultrafiltration back flushing device has the advantages of low energy consumption, completeness in cleaning, good flux recovery, easiness in operation management, low investment and running costs and the like, and can be used by being matched with an ultrafiltration device.

The invention provides a helical flow dephosphorization reactor. The helical flow dephosphorization reactor comprises a pre-backwashing zone, a gas stripping lifting zone, a water discharging zone, a filtering zone, a water feeding zone, a backwashing zone and a solid-liquid separation zone from bottom to top; the pre-backwashing zone comprises an inverted bench body, and an escape tube is arranged below the inverted bench body; the gas stripping lifting zone comprises a gas stripping tube, and the lower end of the gas stripping tube is provided with a gas stripping gas inlet tube; the water discharging zone comprises a filtered water collecting tube, and the filtered water collecting tube is coaxially arranged outside the gas stripping tube; the filtering zone comprises a lower cylinder, and the lower cylinder is coaxially arranged outside the filtered water collecting tube; the water feeding zone comprises a water feeding tube, and the water feeding tube is connected with the upper end of the lower cylinder; the backwashing zone comprises a backwashing air tube, the backwashing air tube is connected with the upper end of the gas stripping tube, and an efficient stripping tube is connected with the top of the gas stripping tube; and the solid-liquid separation zone comprises an upper cylinder, and the upper cylinder is connected with the top of the lower cylinder. The reactor has the advantages of continuous running, tending towards a laminar flow state, small dead zone area, high filtering and backwashing efficiency, reasonable and concise structure, convenient processing and convenient popularization application.

The invention relates to a sewage three-level effluent advanced treatment device. The device mainly comprises a coagulating basin, wherein the upper end of the coagulating basin is connected with a chemical dosing device, the water outlet of the coagulating basin is connected with a surface turbulence filtering device, the water outlet of the surface turbulence filtering device is connected with a photocatalytic degradation reaction device, the water outlet of the photocatalytic degradation reaction device is connected with a secondary nanometer aeration advanced oxidation device, and the water outlet of the secondary nanometer aeration advanced oxidation device is connected with an ultrafiltration device. The invention also discloses a sewage three-level effluent advanced treatment method.

The invention belongs to the technical field of water pumps, and particularly relates to a clogging prevention control method of a floating water pump. The clogging prevention control method of the floating water pump includes the following steps that 1, the power of a drive motor of a pump body is monitored; 2, the monitored power of the drive motor is compared with preset power and maximum application power of the drive motor; 3, according to comparison results in step 2, the pump body is controlled to make the floating water pump rotate faster, or the pump body stops working, and when the pump body stops working, water in the floating water pump and water in a water pipe are subjected to back flush. During running of the floating water pump, the flow of the floating water pump is reduced, when the power of the floating water pump increases to be within a preset range, the rotation speed of the floating water pump is moderately increased through a control cabinet, and water flow needed by a customer is ensured; when filter screen clogging becomes more serious and the maximum application power of the floating water pump motor is reached, a back flush command is started; a gap withpreset width exists between the periphery of a filter screen and a floating ring, it is convenient to flush junk inside the floating ring and at the inner sides of filtration pores to the external ofthe floating ring, the situation is avoided that the junk deposits at the inner sides of the filtration pores, and the back flush efficiency can be greatly improved.

The invention discloses a biofilm active sand reactor and a wastewater treatment method thereof. The biofilm active sand reactor comprises a main body, a water inlet pipe, an effluent weir, a filter material, a water distributor, a sand guide cone, an air lifting pump, a sand lifting air nozzle, a sand lifting pipe, a sand washer, a sand washing water outlet and an electric control system. The wastewater enters through the water inlet pipe and is uniformly distributed by the water distributor; the wastewater goes adversely from bottom to top and goes through the filter material; impurities in the wastewater are filtered, and the turbidity and chroma in the wastewater are effectively removed. By adopting the reactor and method disclosed by the invention to treat wastewater, the reactor covers a small area, the backwashing efficiency of a filter material is high, and the filter material is not hardened; by wrapping the filter material with a biofilm, an effect of removing organic pollutants in the wastewater is realized; moreover, the chroma and turbidity removal effect of the whole system is more remarkable due to microorganisms. After the treatment, the COD (chemical oxygen demand), turbidity and chroma in the water reach or exceed the first-class A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002).

The invention relates to an automatic back-washing combined filter which is characterized by comprising a sediment filter tank body; a sediment inlet, a back-washing water outlet and an air inlet/exhaust valve are arranged at the top of the sediment filter tank body; a water-sediment swirler is arranged in the sediment filter tank body; an outlet opening at the bottom of the sediment filter tank body passes out of the baseplate of the sediment filter tank body and is connected with a sand tank; one end of an overflow pipe connected with the water-sediment swirler extends into a water-sediment swirler tank body, and the other end of the overflow pipe is connected with the junction between the outflow pipe and a back-washing drainage pipe; an electromagnetic three-way valve is arranged at the junction; two ends of the outflow pipe are arranged in the sediment filter tank body; a water inlet tube passing out of the sediment filter tank body is connected on the water-sediment swirler tank body; drain pipes passing out of the bottom plate of the sediment filter tank body are connected with the bottoms of two mesh gauze filters arranged in the sediment filter tank body; two ends of the back-washing drainage pipes pass out of the sediment filter tank body and are correspondingly connected on the drain pipes; an impeller is arranged in the sediment filter tank body; and the motor fixed on the sediment filter tank body provides power for the impeller.

The invention provides a novel sand and rock filter, relates to a filter for surface water filtering and sewage treatment, and aims to provide a novel sand and rock filter which is simple in structure, low in use and maintenance cost, and complete in filtering and cleaning. The novel sand and rock filter comprises a tank body; a water inlet and a sand filling opening are formed in the upper part of the tank body; a water outlet and a sand digging opening are formed in the lower part of the tank body; a plurality of brackets are mounted below the tank body; a single buffering baffle is arranged under the water inlet; the edge part of the buffering baffle is arranged upwards in an inclined manner; a filter element base is mounted above the water outlet; a back washing valve and a plurality of filter elements are arranged on the filter element base; each filter element comprises a framework and a wrapping wire wound on the framework; the cross section of the wrapping wire is trapezoidal; the bottom surface, corresponding to the longer bottom edge, of the trapezoidal cross section is in contact with the framework; a V-shaped clearance is defined by two adjacent circles of the wrapping wire on the framework; a sand and rock mixing layer is arranged in the tank body; the top surface of the sand and rock mixing layer is higher than the upper surfaces of the filter elements.

The invention belongs to the technical field of coal mine fully-mechanized mining work surface filters, and provides a high water base filtration system back washing apparatus based on fluid-solid coupling vibration, and a back washing method thereof. The high water base filtration system back washing apparatus comprises a filtration core arranged in a filter, a jet flow liquid storage chamber, a drainage member, a clockwise jet flow pipe and a counterclockwise jet flow pipe, wherein a flow meter and a throttle valve are arranged between a high water base hydraulic pump and the first channel of the drainage member, the second channel of the drainage member is communicated to the liquid inlet P of an insertion-installation valve through the jet flow liquid storage chamber, the liquid outlet A and the liquid outlet B of the insertion-installation valve are respectively communicated to the clockwise jet flow pipe and the counterclockwise jet flow pipe, the clockwise jet flow pipe and the counterclockwise jet flow pipe are respectively provided with a plurality of clockwise jet flow holes and counterclockwise jet flow holes obliquely intersecting with the cross section circumference of the filtration core, and the control ends of the insertion-installation valve and the throttle valve, and the output end of the flow meter are connected to a PLC controller. According to the present invention, with the apparatus and the method, the back washing effect is improved, the back washing control process is simple, and the apparatus and the method can be widely used in coal mine fully-mechanized mining work surface.

The invention discloses a siphon type valveless filtering pool comprising a pool body (1), a clean water tank (2), a filtering water chamber (3), a water outlet (4), a water inlet pipe (5), a filtering layer (6) and a closed pipe (7), wherein the pool body (1) is provided with a siphon pipe (8) which is communicated with an outlet end of the water inlet pipe (5); the siphon pipe (8) comprises a siphon ascending pipe (9) and a siphon descending pipe (10); the lower end and the upper end of the siphon ascending pipe (9) are respectively connected with the outlet end of the water inlet pipe (5) and the upper end of the siphon descending pipe (10); the lower end of the siphon descending pipe (10) is immersed into a water seal tank (11) located at the lower side of the pool body (1); and the lower wall of the upper end of the siphon ascending pipe (9) is provided with a siphon assisting pipe (12) and the upper wall of the top end of the siphon pipe (8) is provided with a siphon damaging pipe (13) with the lower end located at the bottom of the clean water tank (2). According to the siphon type valveless filtering pool disclosed by the invention, the backwashing speed is high, the efficiency is high and the backwashing is complete, so that the siphon type valveless filtering pool is suitable for being popularized and used.

The invention discloses a gas-water united siphon bi-directional backwash art and the device thereof, belonging to the backwash field of the sewage treating art. The invention relates to establish a new backwash art in a fluidized bed system for treating sewage, and names the art as a gas-water united siphon bi-directional backwash art. The invention has the characteristics that the bottom aeration is adopted; when the lower part has inflow and reaches the siphon water level, the siphon at the lower part automatically discharges backwash water. The new backwash art has the advantages of time and water conservation, short recover period after the backwash, prolonged backwash period and so on when being compared with the commonly adopted gas-water united unilateral backwash art and the single pure water backwash art at present.

The invention discloses a pulse backwashing deep bed filter device and a method, and belongs to the technical field of automatic control. A set of device may be provided with 1, 2.....n pulse backwashing deep bed filters; the pulse backwashing deep bed filter comprises a casing, a water collection mechanism arranged on the lower part of the casing and a connecting tube thereof, a water distributing mechanism arranged on the upper part of the casing and a connecting tube thereof, a filter material cushion layer arranged on the lower part of the casing, a filter material arranged in the middle part of the casing, and a filter material height detection device arranged on the upper part of the casing; a backwashing pump is a centrifugal pump, the rotating speed of an arranged motor can be regulated in variable frequency; a flow detection device is arranged on a main backwashing pipeline of a backwashing pump outlet; a control cabinet is provided with a PLC (programmable logic controller), and also provided with a frequency converter for regulating the rotating speed of the backwashing pump; the flow detection device and the filter material height detection device are provided with detection signal output ends which are connected with signal acquisition ends of the PLC. The effect of the pulse backwashing deep bed filter device is that: water-saving high-efficiency cleaning of a filtering layer can be performed by used of backwash water producing flow fluctuation.

The invention provides an electrostatic separator capable of changing a packing stacking mode and a cleaning method thereof, the packing stacking mode can be conveniently changed in the electrostaticseparator without disassembly; the technical problem of backwashing of a packing is insufficient, the backwashing efficiency is low, and the packing is difficult to dry in the prior art are solved. The electrostatic separator comprises a cylinder body; a plurality of packing plates are arranged among an electrode column, an inner electrode and the cylinder body which are coaxial, each packing plate is provided with an assembly column insertion hole, a fixed column insertion hole, a movable column insertion hole, an electrode hole and a packing placement hole, packing is arranged on the packingplates, odd-numbered plates are fixed through fixed columns, and horizontal movement of even-numbered plates is controlled through movable columns to change the packing stacking mode.