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

The invention relates to a sewage treatment method and a device thereof. The sewage treatment method is characterized in that the method comprises the following steps that: 1) the electric flocculation and the ozone catalytic oxidation are synchronously performed, and a flocculating agent produced by the electric flocculation and a small amount of activated carbon inside an electric flocculation vessel are a catalyst for ozone oxidation; and 2) water to be treated enters a treatment vessel body through an inlet of the treatment vessel body, is subjected to electric flocculation and ozone catalytic oxidation, is adsorbed by the activated carbon and then is drained from an outlet of the treatment vessel body. The sewage treatment device for realizing the method comprises the electric flocculation vessel body, an adsorption filtration vessel body, adsorption medium and an electrode plate, and is characterized in that the electric flocculation and the ozone catalytic oxidation are synchronously performed, COD in sewage is obviously reduced through the electric flocculation and the ozone catalytic oxidation after the sewage enters from a water inlet pipe, and then the sewage is adsorbed by the activated carbon further so as to realize high removal rate of the COD. The method and the device have good treatment effect and broad application range; and under same treatment conditions, the device is small and has less floor space.

The invention discloses a system and a method for purifying sewage by powdered active carbon. The system comprises a carbon adding device, a mixing treatment device, a carbon-water separation device, a backwashing device, a control system and a power supply module. The method comprises the following steps: sufficiently mixing the powdered active carbon with the sewage and feeding a mixture into the carbon-water separation device by a feeding pump to be subjected to carbon-water separation; then detecting a water inlet and outlet pressure difference of the carbon-water separation device according to a pressure controller; automatically starting the backwashing device to carry out backwashing on a hollow micro-pore filtering pipe; and finally, closing the backwashing device and opening a coal slurry outlet solenoid valve; discharging the coal slurry; and activating after dehydrating and drying. The system and the method disclosed by the invention can be used for purifying the sewage by using the powdered active carbon; equipment is simple and easy to operate and low in operation cost; the separated powdered active carbon is intensively recycled; the continuous operation time of the equipment is long, the backwashing time is short and the efficiency is high.

An integrated lightweight filter-material water treatment filter tank is characterized by comprising at least a water treatment unit. The water treatment unit comprises a tank. The tank is composed of a clear water area, a filtering area and a water inlet area which are communicated with each other through water-flow from the top to the bottom. Adjacent two areas of the above three areas are isolated through a filter board respectively. The filter board is provided with several water channels used for water flowing. The water inlet area has a water inlet used for receiving sewage to be filtrated. The filtering area holds several lightweight elastic filter material particles which have lower density than water. Particle size of the lightweight elastic filter material particles is greater than width of the water channels. After water-flowing, each lightweight elastic filter material particle forms a filter layer, and there is a gap between the filter layer and the lower filter board. The top of the clear water area is an overflow surface of clear water. The filter tank has advantages of good filtering effect, low backwashing requirement, high reliability, low cost, low operation cost, less land occupation and convenience in operation management.

The invention discloses a full-automatic suction self-cleaning filter comprising a casing, a filter screen, a mandrel, a soil pick-up pipe, a sucker, a driving device and a control system. Wherein, the casing is divided into a cleaning room and a soil exhaust room while the filter screen is mounted in the cleaning room, the mandrel is mounted in the casing to through the filter screen; the soil pick-up pipe is fixed on the mandrel; the sucker is mounted on the outer surface of soil pick-up pipe of cleaning room to be connected with the soil pick-up pipe; the casing has a water inlet and a water outlet; the filter screen has a water inlet connected to the one of casing; the floss hole of soil pick-up pipe is arranged in the soil exhaust room which has a soil exhaust hole through with outside; a soil exhaust valve is mounted on the floss hole or the soil exhaust hole; the driving device can rotate the mandrel when moves along the axis of mandrel; and the control system and the driving device are connected to the soil exhaust valve. The invention operates automatically without interrupted water supply to realize the intelligent control. And the invention has short reverse washing time, and lower water consumption for exhausting soil to save water and power resource.

The invention relates to an upward flow type biological aerated filter. The biological aerated filter comprises a plurality of filter chambers which are connected in series sequentially, wherein a water inlet region is arranged in each filter chamber, sewage enters the water inlet region of the bottom of the first filter chamber by virtue of a pipeline, and each water inlet region is connected with a dredge pipe; a filter region is arranged in each filter chamber above the water inlet region, a ceramisite filter material covers each filter region, a supporting separator is arranged under each filter region, a filter head is fixedly arranged on each separator, and an aerator pipe is arranged under the filter material; except the first filter chamber, an overflow weir is arranged on the top of one side, close to the previous filter chamber, of an arbitrary filter chamber, and the water inlet region of an arbitrary filter chamber is connected with the overflow weir of the filter chamber by virtue of a water delivery pipe, so that the heights of the overflow weirs in the plurality of filter chambers are gradually reduced from the side of the water inlet end to the side of the water outlet end. The upward flow type biological aerated filter is easy to maintain, cannot be blocked easily, and can be used for effectively improving the sewage washing effect.

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 relates to a filter equipment, in particular to a full automatic sewage-brushing and backwashing water filter. According to the technical proposal provided by the invention, a filter screen is arranged in a shell body. The invention is characterized in that a reducer is arranged on the shell body; a plurality of cylinder-shaped filer screens is uniformly arranged on a stent; the stent is connected with a main shaft; the main shaft is connected with the output end of the reducer; every filter screen is internally provided with a rotating shaft which is provided with a brush; the end of the brush is touched with the inner wall of the filer screen; the end of the rotating shaft extends out of the filter screen. The end of the rotating shaft is also provided with a planetary gear while every planetary gear is respectively meshed with a gearwheel fixed in the shell body. A water inlet, a water outlet and a backwashing pipe are arranged at the lower part of the shell body 2. The water filter backwashes the filter screen automatically after being used for a period of time, which ensures the normal operation of the water filter and alleviates the labor intensity of workers.

The invention relates to an automatic backwashing system for a water vapor sampling filter of a thermal power plant. The system comprises a filter, a measurement flow cell and a backwashing water storage tank, a water inlet of the filter is communicated with a water vapor inlet pipe; the water vapor inlet pipe is connected with a first electric control valve in series; the water vapor inlet pipe is communicated with a backwashing drain pipe; a second electric control valve is connected in series to the backwashing drainage pipe; a water outlet of the filter is communicated with a water vapor outlet pipe; the water vapor outlet pipe is connected with a third electric control valve in series; the water vapor outlet pipe is communicated with the measurement flow cell; the measurement flow cell is communicated with the backwashing water storage tank through a communicating pipe; a backwashing water storage tank is communicated with a backwashing pipe, the backwashing pipe is connected backto a water vapor outlet pipe, a backwashing water pump is connected in series to the backwashing pipe, a fourth electric control valve is connected in series to the backwashing pipe, and the filter can be automatically or manually backwashed after running for a certain period, so that the quality of water vapor in a system is guaranteed.

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.

The invention discloses a novel rotating energy-saving water purifying device in the field of raw water purification. A water purifying container is cylindrical and tubular, oval sealing heads are adopted on the upper portion and the lower portion, and a sealing pressure bearing container is formed in a welding mode through metal. A scraper is a rotating type scraper. A scraper motor drives a lower scraping plate through a rotating shaft to move circularly around the central axis, the scraper motor is a hydraulic motor and utilizes self water pressure to spray water radially to generate counter acting force and moves circularly around the central axis under the drive of the counter acting force. High pressure raw water at a back washing dirt discharging water inlet/outlet is used for back washing a filtering material, the raw water enables a sand layer to be bulk by utilizing the self pressure from bottom to top during back washing, and intercepted impurities are brought out of the water purifying device through the high pressure water. The water purifying device has the advantages of being reasonable in process, low in energy consumption, short in back washing time, complete in sludge discharge and the like.

The invention discloses a spiral pulse gas-water composite backflushing system which includes a filter tank, gas-water mixing jet pipes are in circumference array arrangement in the filter tank, independent first and second pulse gas jet branch pipes and a backflushing water jet pipe are arranged in each gas-water mixing jet pipe, the out-jet direction of jet ports of the first pulse gas jet branch pipes are in clockwise arrangement according to the circumference array to form a positive spiral pulse gas-water mixing jet system, the out-jet direction of gas-water jet ports of the second pulse gas jet branch pipes are in anticlockwise arrangement according to the circumference array to form a negative spiral pulse gas-water mixing jet system, and the first and second pulse gas jet branch pipes are connected with a pulse gas source input device. A filter media in the filter tank can be stirred at a high speed by spiral pulse compound gas and water, the filter media can intensely collide and move in the filter tank, discharge of impurities in the filter media into water is accelerated, and the filter media can be quickly restored to the level before filtration.

The invention relates to a filter for a pretreatment technology of sea water desalination. Sea water corrosion resistant antiseptic is added into filter concrete; a concrete interior surface contacting with sea water is coated with sea water resistant anticorrosive paint; steel bar in the concrete is provided with steel bar rust remover; metal pieces contacting with sea water in the filter are made of high alloy duplex stainless steel S32205 (ASTM); non-metallic materials comprise sea water corrosion resistant FRP glass fiber reinforced plastic, ABS engineering plastic and EPDM rubber, etc. Durability of the filter is enhanced; air water back washing and surface sweep washing are employed by the filter to realize a good back washing effect; technical breakthrough in filter material selection is realized by employing a double layer filter material, which has strong dirt containing ability, and quality of water outlet from the filter is improved substantially; during air water back washing, electric draining gate valve is closed, so as to realize high speed backwashing, short backwashing time, long backwashing period, small water consumption and avoid loss of filter material during backwashing. The filter has a high degree of automatic operation and is convenient for management; besides, a civil structure is simple in order to save capital construction investment and facilitate construction.

A precision treater for condensed water belongs to the technical field of water treatment equipment, and comprises a barrel, a barrel cavity partition plate, a group of lower cavity filter elements, a condensed water leading-in pipe, a spacer sleeve, a return water pipe, a back-wash pipe drive mechanism and a back-wash pipe, wherein the barrel is provided with an upper seal head and a lower seal head; the barrel cavity partition plate is arranged in a barrel cavity; a group of lower cavity filter element liquid outlet matching holes are formed in the barrel cavity partition plate; the lower cavity filter elements are arranged in the lower cavity of the barrel; the condensed water leading-in pipe is fixed with the bottom of the lower seal head; the spacer sleeve is fixed on one side of the upper seal head; a spacer sleeve water inlet connector extends from one side of the spacer sleeve; a one-way valve is arranged on the water inlet connector; one end of the return water pipe extends into the cavity of the spacer sleeve, and the other end thereof extends out of the barrel cavity; the back-wash pipe drive mechanism is arranged on the upper seal head; the upper end of the back-wash pipe extends into the cavity of the spacer sleeve, and the lower end thereof is supported in the center of the barrel cavity partition plate. The precision treater has the characteristics that a back-wash liquid spray arm is fixed at the lower end of the back-wash pipe, a spray arm opening is formed in the bottom of the back-wash liquid spray arm, the back-wash effect is ideal, the back-wash time is shortened, energy is saved, the outage time of the equipment is shortened, the structure is simplified, and the material is saved.