7results about How to "Reduce backwash frequency" patented technology

The utility model belongs to water treatment technical field, specifically discloses a perforated folded plate for sedimentation tank and the sedimentation tank of oblique installation perforated folded plate. The perforated folded plate is the plate -like structure of undulating extension and includes at least three folded plate tops of undulating top end and three folded plate bottoms of undulating bottom end, and the folded plate top of perforated folded plate is adjacent to the folded plate bottom and is provided with a plurality of folded plate holes on or close to the folded plate top. The water inlet and the water outlet of the sedimentation tank are separately arranged in the lower part and the upper part of the pool body, a folded plate support is fixed above the water inlet in the pool body, a plurality of aforementioned perforated folded plates are obliquely arranged on the folded plate support in the pool body, the folded plate top of the perforated folded plate faces upwards and the folded plate bottom faces downwards. The perforated folded plate top of the utility model is provided with the folded plate hole, and the sewage can flow upwards through the folded plate hole, which not only can increase the sedimentation area, but also can realize automatic sludge discharge, has the characteristics of simple structure, wide application range, high sedimentation efficiency and automatic sludge discharge.

The utility model discloses a kind of waste recovery devices for lens processing, it is related to waste recovery technical field, including jar body, the water inlet pipe is connected in the side top end of jar body, the inside top end fixedly connected with inner tube of jar body, the water outlet pipe that penetrates jar body is connected in the side of inner tube, the filter core is fixedly connected in the inside of inner tube, the liquid inlet that is communicated with filter core inner cavity is equipped in the bottom end of inner tube, filter screen is fixedly connected in the liquid inlet place;Spiral fairlead is fixedly connected in the outside of inner tube, multiple side baffles are vertically fixedly connected along the circumferential direction of the inner wall of jar body, the bottom end of jar body is equipped with deslag pipe.This waste recovery device for lens processing can gradually recover glass waste in wastewater from big to small, with small floor area, high recovery processing efficiency.

The invention relates to printing filtering equipment with an automatic backwashing and recycling function, which is applied to the field of filtering, two corresponding servo motors are started to enable a lead screw to rotate to drive a movable scraping plate to fall off to scrape off blockages, the blockages are concentrated at the lower part of a filter element, the content of the blockages in a blow-off pipe is high, and when the movable scraping plate falls off, the movable scraping plate does not fall off. Compared with the prior art, the method has the advantages that the consumption of backwashing water is reduced, the pollution discharge smoothness is improved, the electromagnetic lantern ring is closed when it is detected that the pressure difference value reaches the threshold value for the first time and the filter element is located below the filter element, and the electromagnetic lantern ring is closed. Waste water is flushed upwards, so that the scrapers move upwards to scrape blockages and accumulate the blockages in a fence space, the filtering time of the filter element is prolonged, when the pressure difference reaches a threshold value again, the servo motor is started to continue back flushing, meanwhile, the electromagnetic valve and the discharging pipe are opened, the blockages on the scrapers are discharged, and the back flushing frequency and water resource waste are reduced.

The utility model belongs to the technical field of polyester material processing, and particularly relates to a low-water-powder polyester pelletizing and drying system which comprises a pelletizing machine and a drying box, the drying box comprises a box body, an L-shaped partition plate is arranged in the box body and divides the inner space of the box body into a drying chamber, a separation chamber and a conveying chamber, a separation pipe is arranged in the separation chamber, and the conveying chamber is communicated with the drying chamber. A plurality of water filtering holes are formed in the pipe wall of the separating pipe, the bottom of the separating chamber is communicated with a drainage pipe, an inclined conveying belt is arranged in the conveying chamber, a spiral pipe is arranged in the drying chamber, a plurality of ventilation holes are formed in the pipe wall of the spiral pipe, and the top end of the spiral pipe is connected with a trumpet-shaped feeding pipe; the transverse air supply pipe blows the slices at the high end of the conveying belt into the trumpet-shaped feeding pipe; the bottom end of the spiral pipe is connected with a discharging pipe, an air outlet is formed in the bottom of the drying chamber, and a hot air blowing pipe is arranged on the top of the drying chamber. According to the utility model, the slices spirally descend along the spiral pipe, and meanwhile, hot air is introduced to blow downwards, so that the drying of the slices is realized, in the process, the collision frequency of the slices is less, the collision force is small, the generation amount of PET dust in the drying process can be greatly reduced, and the quality of the slices is improved.

The present invention discloses a combined upward split multi-media biofilm reactor, comprising a reaction tank, at least two BAF reaction zones arranged at the lower part of the reaction tank, a matrix layer filled in the BAF reaction zone, a water inlet system and an aeration system sequentially distributed at the bottom of the BAF reaction zone, at least two mutually separated MBBR reaction zones arranged at the upper part of the reaction tank, a filler zone arranged in the MBBR reaction zone, and a water outlet trough arranged in the middle of the top of the reaction tank. The present invention can complete backwashing without stopping operation. The aeration device is designed as one for use and one for standby. Only one aeration device needs to be turned on for normal operation. When the multi-media biofilm needs to be backwashed, the two aeration devices are turned on at the same time, and the backwashing of the multi-media membrane is completed by air flushing. There is no need to select a large single aeration device due to backwashing, which causes unnecessary energy consumption.

This invention discloses a method for treating highly hydrochloric acid wastewater from the rare earth industry by recycling hydrochloric acid, belonging to the field of rare earth metallurgical wastewater treatment and resource recovery technology. The method includes the following steps: first, homogenizing the wastewater, followed by primary membrane filtration to remove the extractant and secondary membrane filtration to remove impurities; then, tertiary membrane forced circulation for extractant-water separation; and finally, deep purification through ion exchange to complete the treatment. This invention provides a method for treating highly hydrochloric acid wastewater from the rare earth industry by recycling hydrochloric acid. This method has strong acid resistance and adaptability, requires no reagent adjustment, achieves thorough extractant and impurity removal, has a high resource recycling rate, achieves zero discharge, has strong process stability, good shock resistance, and high industrial adaptability, enabling large-scale industrial application. It solves the problems of high reagent consumption, incomplete hydrochloric acid recovery, easy membrane and resin fouling, waste of extractant resources, and easy secondary pollution in existing treatments of highly hydrochloric acid wastewater from the rare earth industry.

The utility model discloses a membrane separation and adsorption combined advanced treatment technology device aiming at electrophoresis wastewater, which comprises a working bottom plate, a water purification cylinder is fixedly connected to one side of the working bottom plate, and a drainage pipe is arranged on one side of the water purification cylinder; one side of the precipitation assembly is fixedly connected with the top of the working bottom plate, and the precipitation assembly is used for precipitating large-particle impurities in the electrophoresis wastewater; the bottom of the purification assembly is fixedly connected with the two sides of the inner wall of the water purification cylinder, and the purification assembly is used for carrying out purification treatment on the precipitated electrophoresis wastewater. According to the membrane separation and adsorption combined advanced treatment technology device for electrophoresis wastewater, the purification assembly is arranged, two purification plates with different heights are adopted, identification and replacement are convenient, and a subsequent water pump is matched, so that the membrane separation and adsorption combined advanced treatment technology device is a low-energy-consumption process form for driving membrane filtration through liquid level difference.