Activated carbon filter, a tank filter device, the outer casing is generally stainless steel or glass steel, filled with activated carbon, used to filter free matter, microorganisms, some heavy metal ions in water, and can effectively reduce the color of water. The role of the activated carbon filter is mainly to remove macromolecular organic matter, iron oxides, and residual chlorine. This is because organic substances, residual chlorine, and iron oxides are easily poisoned by ion exchange resins, and residual chlorine, cationic surfactants, and the like not only poison the resin, but also damage the membrane structure and render the reverse osmosis membrane ineffective.
The principle of adsorption of activated carbon is: a balanced surface concentration is formed on the surface of the particles, and the impurities of the organic substances are adsorbed into the activated carbon particles, and the initial adsorption effect is high. However, after a long period of time, the adsorption capacity of activated carbon will be weakened to varying degrees, and the adsorption effect will also decrease. If the water in the aquarium is turbid and the organic content in the water is high, the activated carbon will soon lose its filtering function. Therefore, activated carbon should be cleaned or replaced regularly.
The size of the activated carbon particles also has an effect on the adsorption capacity. In general, the smaller the activated carbon particles, the larger the filtration area. Therefore, the powdered activated carbon has the largest total area and the best adsorption effect, but the powdered activated carbon easily flows into the aquarium with water, which is difficult to control and is rarely used. Granular activated carbon is not easy to flow due to particle formation, and impurities such as organic matter in water are not easily blocked in the activated carbon filter layer, and its adsorption capacity is strong, and it is convenient to carry and replace.
The adsorption capacity of activated carbon is proportional to the time of contact with water. The longer the contact time, the better the water quality after filtration. Note: The filtered water should flow out of the filter layer slowly. The new activated carbon should be cleaned before the first use, otherwise black ink will flow out. Before the activated carbon is installed in the filter, it should be spread with 2~3 cm thick sponge at the bottom and top to prevent the penetration of large particles such as algae. After 2~3 months of activated carbon, if the filtration effect is reduced, it should be exchanged. New activated carbon and sponge layers should be replaced regularly.
The activated carbon filter pressure vessel is a pressure vessel filled with a thick quartz sand cushion and high quality activated carbon.
Principle of activated carbon adsorption
Activated carbon is a very fine carbon particle with a large surface area, and there are finer pores in the carbon particles - the capillary. This capillary has a strong adsorption capacity and is sufficiently in contact with gas (impurities) because of its large surface area. When these gases (impurities) hit the capillary, they are adsorbed and purify. The surface area of ​​activated carbon is very important. The specific surface area detection data of activated carbon can only be verified by the BET method. There are many instruments in China that can only be directly compared, and now it has been eliminated in China. At present, the specific surface area test at home and abroad adopts the multi-point BET method. The specific surface area measurement standards developed at home and abroad are based on the BET test method. Please refer to the national standard of China (GB/T 19587-2004) - Gas adsorption BET principle A method of determining the specific surface area of ​​a solid material. The specific surface area detection is actually a relatively time-consuming task. Due to the different adsorption capacity of the sample, some samples may take a whole day to test. If the test process is not fully automated, the tester can not leave at all times. High concentration, observing the dashboard, and manipulating the knobs, a little inattention will lead to the failure of the test process, which will waste a lot of valuable time for the testers. The F-Sorb 2400 specific surface area tester is an instrument that can truly realize the BET detection function (both direct contrast method). The more important F-Sorb 2400 specific surface area tester is the only fully automated and intelligent specific surface area inspection equipment in China. The test results are highly consistent with international standards, and the stability is also good, while reducing human error and improving the accuracy of test results.
The activated carbon filter is a pressure vessel filled with a thick quartz sand cushion and high quality activated carbon. 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 water odor, colloid and pigment, heavy metal ions, etc., and also has the effect of reducing COD. The SDI value of the RO influent can be further reduced to ensure SDI < 5 and TOC < 2. Oppm.
The activated carbon filter is designed and manufactured by us after taking the advice of the majority of users. It changes the original water inflow and sewage direction, making the water purification effect better and more popular among users. This product is a necessary equipment for water treatment such as drinking water and food water. After the turbidity <5 mm / liter of water is treated by the equipment, it can be clear and transparent, dry and mellow, non-toxic, sterile, no odor, and can be directly consumed by drinking water. Purified water meets national drinking water quality standards.
The device can remove the discoloration, odor and mercury, lead, cadmium, zinc, iron, manganese, chromium and other heavy metal substances in the clear water, and can also remove the arsenic, hydride, sulfide, residual chlorine and other polymer compounds in the clear water. Radioactive substances such as radon and radium remove and kill bacteria and E. coli and other carcinogens in the water. It is an ideal water supply equipment for drinking water, food, beverage, pharmaceutical, chemical and other industrial purified water. The activated carbon filter has a simple structure and convenient operation and maintenance. Applicable to food, beverage, chemical and other enterprises and institutions with high water quality requirements, but also used in restaurants, hotels, troops, stations, terminals. Water supply equipment for industrial water and domestic water.
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.
When the user actually chooses, the filter form and the type of activated carbon should be determined according to the type of pollutant, concentration and 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
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