1471 results about "Backwashing" patented technology

The invention provides an efficient photocatalysis water treatment device. The efficient photocatalysis water treatment device comprises a tank body, a quartz tube, a backflow port, an extra-ultraviolet tube, a three-dimensional ceramic honeycomb net photochemical reaction chamber, a sewage distributor, a sewage port, an aeration port, an aeration assembly, a sewage draining port, a medicine distributing assembly, a medicine port, a coarse filtering net, a high-pressure backwashing device, a high-pressure water port, a tail gas recovering port and a reciprocating motion device; three ports are formed at the lower part of the tank body, namely, an organic sewage port, the aeration port and the medicine port; the three-dimensional ceramic honeycomb net photochemical reaction chamber for loading the extra-ultraviolet lamp and a nanometer TiO2 photocatalyst are formed at the upper part of the tank body; and the tail gas recovery port is formed at the upper part of the tank body.

A mobile water purification system is configured as modules to be air-lifted to a site requiring potable water. Raw water is pumped to a pre-treatment module that separates suspended solids and preferably oxidizes organic contaminants. At least one, and preferably two or more filtration modules coupled in parallel, then remove contaminants using ultrafiltration and/or reverse osmosis, and pass treated water to a storage tank. A control system operates valves to stagger backwashing of filtration modules, allowing one such module to be backwashed while allowing others to continue filtering water. The control system can selectively bypass a reverse osmosis unit, and disable related booster pumps, depending upon raw water quality. During backwash cycles, sodium bisulfite is added to fill water directed into ultrafiltration units to neutralize free chlorine present in backwash fluid.

The invention discloses a method for treating waste gas with a biological trickling filter tower: the waste gas is passed through the bottom of the biological trickling filter tower, treated by the biological trickling filter tower, and the treated waste gas is discharged from the top, and the biological trickling filter tower is composed of The bottom of the tower with exhaust gas inlet, the tower body, and the top of the tower equipped with exhaust gas outlet are composed. The tower body is composed of several biological treatment units stacked from bottom to top, and the biological treatment units on adjacent layers are arranged There is a liquid interlayer, and the air vents for the adjacent layers are arranged on the liquid interlayer, and each layer of biological treatment units is independently equipped with a nutrient solution spray system and a temperature control device from top to bottom. Biological packing layer and nutrient solution receiving pool; the invention increases the processing load of the unit packing; improves the plugging problem of the packing layer, avoids the occurrence of channeling phenomenon, and has uniform and sufficient gas-liquid contact; packing replacement and backwashing are more convenient; the process Economical, suitable for the purification treatment of complex volatile organic mixed pollutants.

The invention relates to a device for optimized control over carbon source feeding in a denitrification biofilter process. The device is provided with a denitrification biofilter, a carbon source box, a frequency-conversion carbon source pump, a carbon source flowmeter, a backwashing air pump and a backwashing air inlet valve; the denitrification biofilter is internally provided with an online-water-inlet nitrate sensor, an online-water-inlet dissolved oxygen sensor, an online-water-outlet nitrate sensor, a nitrate determinator, a dissolved oxygen determinator, a process controller, and an industrial personal computer; and a water inlet pipeline is provided with a water inlet pump, a water inlet valve and an online-water inlet flowmeter. A method for optimized control cover the carbon source feeding is characterized by comprising the following steps of: (1) introducing water; (2) processing and judging parameters; (3) processing frequency ft by a frequency converter; (4) preventing excessive feeding of a carbon source; (5) stably running; (6) diagnosing faults; and (7) performing backwashing. The device and the method disclosed by the invention can be widely applied to sewage advanced treatment and nitrogenous industrial wastewater treatment, is particularly suitable for producing high-quality recycled water, have the advantages of complete structure, precision for control, good effect and high efficiency.

The invention discloses an automatic backwashing filter and a working method, which are suitable for filtering impurities in sewage. The filter comprises a runner switching main valve, a valve plate and a barrel, the valve plate is arranged on an upper opening of the barrel, and the main valve is arranged on the valve plate and communicated with the interior of the barrel through a runner; two flow channels are arranged on the valve plate, one flow channel is a filtering flow channel communicated with the inner space of the filter screen, and the other flow channel is a backwashing flow channel communicated with the space between the filter screen and the cylinder body; the flow channel switching main valve comprises a valve body, a sewage draining exit, a water inlet and a water outlet are sequentially formed in the valve body from left to right, and a filtering outlet connected with the filtering flow channel and a backwashing outlet connected with the backwashing flow channel are sequentially formed in the lower portion of the valve body from left to right; wherein a two-position five-way reversing valve group capable of automatically switching a normal working mode or a backwashing mode according to the blockage condition of the filter screen is arranged among the drain outlet, the water inlet, the water outlet, the filter outlet and the backwashing outlet. The filter is simple in structure, does not consume energy, and automatically switches backwashing.

The patent of the invention brings forward a novel multimedium filter for water treatment. The filter comprises a tank, a baffle plate, a water-locator, a filter material layer, an aeration system, a clear water sump and a novel specific backwashing stirring device. The device can be structured in a round, square or other vertical shape. In the meanwhile, a stirring system of the built-in novel specific backwashing stirring device can be used for deep stirring of a filter layer during routine backwashing process of the equipment. Under the action of continuous fiction and repeated stirring by stirring vanes, pollutants on the filter material layer peel off from a filter material. Simultaneously, dropped and separated pollutants are washed away from the inside of the tank by the utilization of a lot of clear water and appropriate compressed air. The unique stirring technology of the device has changed a backward technology of a traditional filter which has defects of unsatisfactory flushing effect, large power consumption and a filter layer which easily undergoes pollution, soil hardening and huddling. The invention is especially applicable to various water purification and sewage treatment fields.

The invention relates to a technology for purifying wastewater in micro-aeration vertical flow wetlands, and belongs to the water pollution control field. The technology adds a manual micro-aeration system in the conventional upwelling vertical downward flow wetlands, and adds channels for washing pipelines and outputting sediments at the bottom part of the wetland system, thereby improving the treatment capacity of the wetland system, having the functions of backwashing and sediment outputting, and prolonging the service life of the wetland. The technology can be independently utilized, and can also be combined with other wetlands by serving as an aerobic unit. The technology can be applied to the domestic sewage processing of villages, small towns and scenic spots, the wastewater treatment of a municipal sewage mixed stream entering a lake and the deep purification of tail water of a sewage treatment plant.

The invention provides an efficient blue algae salvaging ship for improving salvaging and treatment efficiency of the blue algae salvaging ship. The efficient blue algae salvaging ship mainly comprises a ship body, a water decanter, a water pump, a filtration pipeline, a chemical feeding tank, an algae-mud dehydrating machine, a rear drainage pipe and a side drainage pipe. Algae-laden water on thesurface layer in a nose direction is collected into an algae water bin by the water decanter, is pressurized by virtue of the water pump, the pressurized algae-laden water enters the filtration pipeline to be dehydrated and then is conveyed into the chemical feeding tank and the algae-mud dehydrating machine, produced algae cake is loaded into an algae cake bin, tail water discharged by the filtration pipeline and the algae-mud dehydrating machine is discharged out from the stern direction by virtue of the rear drainage pipe and the side drainage pipe. The filtration pipeline is regularly back-washed by lifting the water decanter, switching a valve and utilizing the tail water of the algae-mud dehydrating machine. After blue algae salvaging is finished, water in the algae water bin, a pipeline bin and the chemical feeding tank is discharged outside the ship body by virtue of the water pump and a backwashing pipe, and the algae cake is transported to a shore to be treated. By implementing the efficient blue algae salvaging ship provided by the invention, a significant role is played for controlling blue algal bloom, water bloom and red tide, improving lake water quality, removing phosphorus and nitrogen in water and alleviating water eutrophication.

An antifouling modified walnut shell filter material as well as preparation method and application thereof are disclosed, and the method is as follows: washing a walnut shell filter material with water, and drying for later use; dispersing hydrophilic micro-nano particles and a silane coupling agent into water, and stirring to obtain a mixed solution; adding water-based resin and an assistant intothe mixed solution, and uniformly stirring and uniformly mixing to obtain a required modifying solution; and adding the cleaned walnut shell filter material into the modifying solution, stirring, filtering, and drying to obtain the antifouling modified walnut shell filter material. According to the invention, the surface modification is adopted, and the contact angle of the walnut shell filter material to water and oil in air is 0 degree, so that the antifouling modified walnut shell filter material has superhydrophilicity and superoleophylic property, has super-oleophobic property at underwater, and has the characteristic of low adhesion to oil drops, so that the anti-fouling property is achieved, the filtering effect is optimized, and the backwashing capability is improved.

The invention discloses an MBR (membrane bioreactor)-based system and method for oil refining wastewater biochemical treatment and a membrane component cleaning method. A biochemical treatment system comprises an aerobic aeration tank, a middle sedimentation tank, an anoxic tank and a membrane bioreactor. The aerobic aeration tank allows pretreated oil refining wastewater to enter, and the middle sedimentation tank connected with the aerobic aeration tank is used for separation mud and water in the aerobic aeration tank to enable part of sludge to be discharged and part of precipitated sludge to flow back into the aerobic aeration tank. The anoxic tank is connected with the middle sedimentation tank, supernatant in the middle sedimentation tank enters the anoxic tank for denitrification, and the membrane bioreactor which forms an organic pollutant main removing unit is connected with the anoxic tank. The MBR system membrane component cleaning method includes: air scrubbing, online backwashing, online chemical cleaning and offline cleaning, especially online cleaning adopts high-concentration NaClO solution and low-concentration NaClO solution alternately, and offline cleaning adopts sodium dodecyl sulfate and sodium carbonate solution for cleaning or NaClO solution for cleaning.

The invention relates to an efficient MVR (mechanical vapor recompression) integrated seawater desalting device and an efficient MVR integrated seawater desalting method. The desalting device comprises a main equipment cabinet, a pre-treating module, a heating and waste heat recycling module, a mechanical vapor re-compressing module and a PLC (programmable logical control) control cabinet which are arranged in the main equipment cabinet, an evaporating module arranged outside the main equipment cabinet as well as connecting pipelines, wherein the pre-treating module comprises a self-backwashing filter, a dosing device and a three-directional control valve; the heating and waste heat recycling module comprises a condensed fresh water heat exchanger and a strong brine heat exchanger, a degassing device and a fresh water tank; the connecting pipelines comprise a sweater pipeline, a condensed fresh water production tube, a strong brine discharge tube and a strong brine circulating tube; and each module is connected to the PLC control cabinet and controlled by the PLC control cabinet. The efficient MVR integrated seawater desalting device disclosed by the invention is compact, small in size, high in assembling precision and convenient to mount and dismount on the spot, can be used for processing according to the modules and maintaining in blocks according to the functions. The device and the method disclosed by the invention are adopted to perform seawater desalting, so that the energy consumption is low, the operation is simple, and the large-scale application and popularization can be realized.

The invention relates to a water filter and an operating principle thereof. The water filter comprises a tank cylinder, a bottom cover and a filter screen cylinder, wherein a water inlet, a water outlet, a back-washing inlet and a sewage draining opening are formed in the side surface of the tank cylinder; an upper flow guide cover is arranged at the upper part in the tank cylinder, and a lower flow guide cover is arranged at the lower part in the tank cylinder; a water inlet flow guide cavity is formed between the upper flow guide cover and the tank cylinder; the water inlet corresponds to the side surface of the upper flow guide cover in the water inlet flow guide cavity; a sewage draining flow guide cavity is formed between the lower flow guide cover and the bottom of the tank cylinder; the sewage draining opening corresponds to the side surface of the lower flow guide cover in the sewage draining flow guide cavity; the filter screen cylinder is limited between the upper flow guide cover and the lower flow guide cover; the area in the filter screen cylinder is communicated with the water inlet flow guide cavity and the sewage draining flow guide cavity. The operating principle is that through controlling the inlets in the side surface of the tank cylinder, when water flows to the area outside the cylinder from the area inside the filter screen cylinder, the filtering is realized, and the back-washing is realized when water flows to the area inside the cylinder from the area outside the filter screen cylinder. The water filter is relatively simple in structure, easy to mount and use, relatively convenient for filter and backwashing, and better in effect, thereby being suitable for being used as a water filtering device.