The carbon filter pressure vessel is a pressure vessel filled with a thick quartz sand cushion and high quality activated carbon. The work of the activated carbon filter is done through a carbon bed. The activated carbon particles constituting the carbon bed have a large number of micropores and a large specific surface area, and have a strong physical adsorption capacity. The water passes through the carbon bed, and the organic pollutants in the water are effectively adsorbed by the activated carbon. In addition, some non-crystalline part of the activated carbon surface has some oxygen-containing tube energy groups, so that the organic pollutants in the water passing through the carbon bed are effectively adsorbed by the activated carbon. Activated carbon filter is a commonly used water treatment equipment. As a pretreatment of water treatment desalination system, it can effectively guarantee the service life of the latter equipment, improve the quality of the effluent water, prevent pollution, especially prevent the reverse osmosis membrane, ion exchange resin, etc. Free state residual oxygen poisoning. The main factors affecting the adsorption effect and service life of the activated carbon filter are: the type and concentration of the pollutant, the residence time of the gas flow in the filter material, the temperature and humidity of the air. In actual selection, the filter form and activated carbon type should be determined according to the type of pollutant, concentration and treatment air volume. The upstream and downstream of the activated carbon filter should have a good dust filter, and the efficiency specification should not be lower than F7. The upstream filter prevents dust from clogging the activated carbon material; the downstream filter blocks the dust from the activated carbon itself. The active sand filter is a continuous filtration device based on the principle of counterflow, which integrates coagulation, clarification and filtration. The influent water enters the treatment system through the water distribution pipe at the bottom of the equipment, and is filtered by the sand bed and overflows from the top outlet. The impurities trapped by the sand bed during filtration are air-powered to the sand washer at the top of the filter tank. The pollutants are separated from the surface of the filter sand by mechanical friction and turbulence. The impurities are discharged with the sand washing water, and the sand is returned by its own weight. Sand bed. Features: 1, high efficiency: 24 hours of continuous work, no need to stop backwashing. 2, low operating costs: no need for high lift large flow backwash pump. 3. Low maintenance cost: it has no rotating parts except quartz sand filter material during operation, low failure rate and low maintenance cost. 4, one-time investment is low: no need to set up a separate coagulation tank, clarification tank and other facilities, no need for backwashing pumps and electric, pneumatic valves and other equipment, small amount of engineering, one-time investment. 5, the head loss is small: a single filter material and the filter material is clean and timely, the head loss is small, the total head loss is ≤ 0.5m. 6, the influent water quality requirements are loose: can withstand 150mg / L concentration of SS water quality for a long time, short-term 300mg / L concentration SS impact and the effluent water quality unchanged. 7. The effluent water quality is stable and the filtration effect is good. The filter material is cleaned in time to ensure high quality and stable water output, and there is no periodic water quality fluctuation. 8. Easy to rebuild and expand: The unit operation mode can be flexibly increased or deleted according to the change of water volume, which is easy to be expanded and expanded. 9. Small footprint and beautiful appearance: It integrates the traditional three-stage reclaimed water treatment process, saving about 70-80% of land; the appearance is more beautiful and compact.
Function: In the water quality pretreatment system, the activated carbon filter can absorb the residual chlorine that cannot be removed in the pre-stage filtration to prevent the reverse osmosis membrane from being oxidatively degraded, and also adsorbs pollutants such as small molecules and organic substances leaking from the previous stage. It has obvious adsorption and removal effects on odor, colloid and pigment, heavy metal ions and COD in water. The SDI value of the RO influent can be further reduced to ensure SDI < 5 and TOC < 2. Oppm.