Chinese name: water filter mbth: water filter structure: simplified, stainless steel filter screen, sewage discharge part, etc. Function: Introduce filter products, uses, working principles, object structure, working principles, design features, application fields, application features, technological innovation, technical parameters, product classification, selection principles, maintenance methods, equipment parameters, uses, filtration process, self-cleaning process, control methods, application scope and product introduction Water filters are widely used in metallurgy, chemical industry, petroleum, papermaking and medicine. Such as industrial wastewater, circulating water filtration, emulsion regeneration, waste oil filtration treatment, continuous casting water system in metallurgical industry, blast furnace water system, hot rolling high pressure water descaling system, etc. It is an advanced, efficient and easy-to-operate automatic filtering device. It consists of a cylinder, a stainless steel filter screen, a blowdown part, a transmission device and an electrical control part. Working principle When the filter works, the water to be filtered flows in from the water inlet, flows through the filter screen, enters the pipeline required by the user through the water outlet for process circulation, and the particulate impurities in the water are trapped inside the filter screen. In this way, more and more particles are trapped and the filtration speed is slower and slower. However, the input sewage will continue to enter, and the filter hole will become smaller and smaller, thus creating a pressure difference between the inlet and the outlet. When the differential pressure reaches the set value, the differential pressure transmitter will send an electrical signal to the controller, control crying to start the driving motor, and drive the shaft to rotate through the transmission assembly, and at the same time, the sewage outlet will be opened and discharged from the sewage outlet. When the filter screen is cleaned, the pressure difference will be minimized. The system will make the water filter of the object structure consist of a shell, a multi-element filter element, a backwashing mechanism and a pressure difference controller. The diaphragm in the shell divides its inner cavity into an upper cavity and a lower cavity. The upper cavity is equipped with a plurality of filter elements, which makes full use of the filtering space and significantly reduces the volume of the filter. The lower cavity is provided with a backwashing sucker. When working, turbid liquid enters the lower cavity of the filter through the inlet, and then enters the inner cavity of the filter element through the baffle hole. Impurities larger than the gap of the filter element are intercepted, and the cleaning liquid reaches the upper cavity through the gap and is finally sent out from the outlet. Working principle: The filter element adopts high-strength wedge-shaped filter screen, which can automatically clean the filter element through pressure difference control and timing control. When impurities in the filter accumulate on the surface of the filter element, resulting in the pressure difference between the inlet and outlet increasing to the set value, or the timer reaches the preset time, the electric control box sends a signal to drive the backwashing mechanism. When the backwashing suction pipe mouth is aligned with the inlet of the filter element, the drain valve is opened, and at this time, the system releases pressure to drain water, and a negative pressure area with a relative pressure lower than the water pressure outside the filter element appears, forcing part of the net circulating water to flow into the inner side of the filter element from the outer side of the filter element, and the impurity particles adsorbed on the inner wall of the filter element will flow into the water tray with the water and be discharged from the drain valve. The specially designed filter screen of the water filter makes the inside of the filter element have spraying effect, and any impurities will be washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of the filter returns to normal or the time set by the timer ends, the materials flow continuously in the whole process, and the backwashing water consumption is less, thus realizing continuous automatic production. After the equipment installation is completed, the technicians debug and set the filtering time and cleaning switching time. The water to be treated enters the machine body through the water inlet, and the filter starts to work normally. When the preset cleaning time is reached, the electric controller sends a signal to the hydraulic control valve and drives the motor to cause the following actions: the motor drives the brush to rotate and clean the filter element, and at the same time, the control valve is opened to discharge pollutants. The whole cleaning process only lasts a few tens of seconds. After cleaning, the control valve is closed and the motor stops running. The design feature of this system is 1. The internal mechanical structure of the filtering equipment adopts patented technology, which realizes the real high-pressure backwashing function, can easily and thoroughly remove the impurities intercepted by the filter screen, and has no dead angle and flow attenuation during cleaning, thus ensuring the filtering efficiency and long service life. Water filter 2. The water filter adopts 304, 3 16L stainless steel wedge filter screen, which has high strength, high precision and corrosion resistance, and the highest filtration precision can reach 25 microns. 3. The water filter realizes automatic backwashing through its own retrieval and emergency functions, and can cope with unstable water quality fluctuations without manual intervention. 4. The water filter has few wearing parts, no consumables, low operation and maintenance cost and simple operation and management. 5. The water filter runs accurately, and the backwashing pressure difference time and time setting can be flexibly adjusted according to different water sources and filtration accuracy. 6. In the backwashing process of the water filter, each (group) filter screen is backwashed in turn; Ensure that the filter screen is cleaned safely and efficiently, while other filters are not affected, and continue to filter. 7. The water filter adopts pneumatic blowdown valve, which has the advantages of short backwashing time, less backwashing water consumption, environmental protection and economy. 8. The water filter has compact and reasonable structural design, small floor space and flexible and convenient installation and movement. Application field 1. Domestic water supply and production process water supply filtration. 2. Pretreatment, such as ultrafiltration, reverse osmosis, softening and ion exchange. 3. Seawater purification of Haibao seedlings; Filtration of seawater and freshwater aquaculture water in factories. 4. Oilfield reinjection water filtration. 5. Filter the circulating cooling water. 6. Reclaimed water reuse, advanced treatment and filtration of wastewater. 7. Circulating water filtration in steel, petroleum, chemical industry, paper making, automobile, food, metallurgy and other industries. 8. Turbidity removal and purification of groundwater and surface water. 9. Central air conditioning and boiler backwater filtration. 10. Feed water filtration of equipment with certain requirements on water quality. 1 1. Water purification in swimming pools and landscapes. 12. Spraying and watering of municipal and green areas, water filtration of agricultural sprinkler irrigation and drip irrigation. Application function 1. The water filter has high filtration accuracy and stable effluent quality. 2. Automatic backwashing can be realized through its own retrieval and emergency functions, and unstable water quality fluctuation can be dealt with without manual intervention. Water filter 3. The water filter control system is sensitive and accurate. It has dual functions of setting pressure difference and time, and can flexibly adjust backwashing pressure difference or time setting value according to different water sources and filtration accuracy. 4. The cleaning is efficient and thorough, and the filter screen can be completely restored to the initial state, which can be used for life without replacement. 5. The backwashing of water filtration equipment does not interrupt the normal water production, and it runs continuously, stably and reliably. 6. The backwashing time is short, and the backwashing water consumption is only 0.00 1 ~ 0.002% of the normal water production, saving water, electricity and energy. 7. The invention has compact and reasonable structural design, small occupied area and flexible and convenient installation and movement. 8. Less wearing parts of the equipment, no consumables, low operation and maintenance costs and simple operation and management. 9. The water filter has a wide range of applications, and can be applied to different raw water quality and water requirements. The technological innovation is 1. 3 16L stainless steel sintered filter screen is used for the first time in the water filter, which has high strength, high precision and corrosion resistance, and the highest filtration precision can reach 2 microns. 2. The patented internal mechanical structure is adopted to realize the real high-pressure backwashing function, and the combination of external high-pressure backwashing of the filter screen and internal self-suction sewage discharge can easily and completely remove the blockage of the filter screen. 3. The differential pressure signal of water filter cleaning is transmitted by differential pressure transmitter, which overcomes the shortcoming of large error of differential pressure switch. 4. The transmission device of the water filter is built-in, sealed, isolated from the over-current parts, and designed with tripping protection function to prevent the motor or body parts from being damaged, and the operation is stable and reliable. 5. The sewage outlet is sealed by hydraulic pressure, and there is no need for solenoid valves or other fragile seals, which is simple and practical. 6. The inlet and outlet flanges of the water filter are designed as movable structure, and the direction of screw holes can be adjusted at will, which is convenient for on-site installation. 7. Special non-toxic anticorrosive materials are used for internal corrosion protection, which has good weather resistance, acid and alkali resistance, salt spray resistance and mildew resistance. 8. The filter adopts integrated control mode, which can realize remote control. Technical parameters ◆ Working pressure: ≤ 1.0Mpa (if higher working pressure is required, please specify it when ordering) ◆ Pressure loss force: ≤0.0 15Mpa ◆ Filtration accuracy: 0.8 mm (it can be manufactured within the precision range of 0.2 ~ 3.5 mm) ◆ Maximum working temperature: ≤/kloc-0. ◆ Scope of application: filter pots, fans, pumps, faucets, centrifuges, water purifiers, direct drinking machines, etc. Properties: acid, alkali, low temperature and waterproof. The following focuses on the anti-corrosion ability of the filter element: ◆ The tank of the water treatment filter element is made of high-performance composite material and glass fiber; ◆ All pressure vessels have 100% corrosion resistance; ◆ Thermoplastic liner made of various materials: polyethylene, polypropylene, polytetrafluoroethylene, etc. Water treatment filter is a kind of filter with quartz sand as filter material. It can effectively remove suspended solids in water, and obviously remove colloid, iron, organic matter, pesticide, manganese, bacteria, viruses and other pollutants in water. It has the advantages of small filtration resistance, large specific surface area, strong acid and alkali resistance, oxidation resistance, PH application range of 2- 13 and good pollution resistance. It is widely used in the pretreatment fields of various process water, domestic water, circulating water and wastewater, such as electric power, electronics, beverages, tap water, petroleum, chemical industry, metallurgy, textile, papermaking, food, swimming pool, municipal engineering, etc. Product classification 1, PP filter element filter: Single-cylinder filters with various PP filter elements are generally low in price, but the filter elements are easily blocked and need to be replaced frequently, so the filtering accuracy is not high, and they are only used for preliminary filtration of water. 2. Activated carbon filter screen: it can eliminate different colors and odors in water, but it can't remove bacteria and other harmful substances in water, and the removal effect of sediment and rust is also very poor. 3, filtration: completely remove the beneficial and harmful substances in the water to produce pure water. Pressurized power supply is needed, and the utilization rate of water is low (there is more waste water and less pure water, which generally wastes about 50% of tap water). The purification cost is high and the flow rate is small, which only solves the problem of drinking water. 4. Water softener: Generally, regenerated sodium resin is used to replace calcium and magnesium ions in water, which only softens and reduces the hardness of water and cannot purify and remove various harmful pollutants in water. 5. Bucket filter: Bucket water purifiers installed on drinking fountains generally use filtering materials such as activated carbon, ceramics and mineralized balls, which have low filtering accuracy and are completely intercepted. It is inconvenient to clean, easy to form secondary pollution, and uses less water, and only solves the drinking problem by positioning. 6. Ultrafiltration: It can effectively remove harmful substances such as sediment, rust, suspended matter, colloid, bacteria and macromolecular organic matter, and retain mineral trace elements beneficial to human body. The filter element has long service life, large water output, no need of power and pressure, low purification cost and high water utilization rate, and is suitable for purifying a large amount of domestic water. 7. Mixed media filter: According to the functional characteristics of different filter materials, combined with various technologies, a wider range of water quality treatment can be realized, and all kinds of harmful substances in water can be removed comprehensively and effectively. For example, Jinliyuan kitchen filter screen, with ultrafiltration as the core component and high performance KDF, can not only effectively remove sediment, rust, suspended solids, colloid, bacteria, macromolecular organic matter and so on. From tap water, it can also effectively inhibit the growth of bacteria in water, and remove heavy metals through KDF, making the filtered water safer and healthier; The water utilization rate is as high as over 95%, and the water yield is large, which can conveniently meet the purification requirements of filtered water in family kitchens. Selection principle 1, inlet and outlet diameter: in principle, the inlet and outlet diameter of the filter should not be less than the inlet diameter of the matching pump, and generally the same as the inlet pipe diameter. 2. Nominal pressure: Determine the pressure grade of the filter according to the highest possible pressure of the filter pipeline. 3. Selection of mesh number: mainly consider the particle size of trapped impurities, depending on the technological requirements of medium flow. See the following table "Screen Specifications" for the particle sizes that can be intercepted by various screens. 4. Filter material: The filter material is generally the same as the connected process pipeline. For different use conditions, cast iron, carbon steel, low alloy steel or stainless steel filters can be considered. 5. The filtration resistance loss calculation of the water filter shows that the pressure loss is 0.52 ~ 1.2 kPa under the general rated flow. Maintenance method ● coarse filter 1, the core part of the filter is the filter element, which is composed of filter frame and stainless steel wire mesh, which is easy to be damaged and needs special protection; 2. When the water treatment filter works for a period of time, some impurities will precipitate in the filter element. At this time, the pressure drop increases and the flow rate decreases, so it is necessary to remove impurities in the filter element in time; 3. When cleaning impurities, special attention should be paid to the stainless steel screen on the filter element not to be deformed or damaged, otherwise the purity of the filtered medium will not meet the design requirements, and the compressor, pump, instrument and other equipment will be damaged; 4. If the stainless steel wire mesh is found to be deformed or damaged, it should be replaced immediately. ● Precision filter 1. The core component of precision filter is filter element, which is made of special materials and belongs to consumable parts and needs special protection. 2. When the precision filter works for a period of time, the filter element will block a certain amount of impurities. At this time, the pressure drop increases and the flow rate decreases. Remove impurities in the filter element in time and clean the filter element at the same time; 3. When removing impurities, special attention should be paid to the precision filter element, which shall not be deformed or damaged, otherwise the reinstalled filter element will not meet the design requirements. 4. If the filter element is found to be deformed or damaged, it should be replaced immediately. Basic parameters of equipment parameters: principle: pressurized filtration application: solid-liquid separation mode: cylinder performance: precision filtration application object: water main material: stainless steel application scope: domestic water in chemical, petroleum, pharmaceutical, automobile, light industry, food, mineral processing, water treatment, electroplating, metallurgy, dye, textile and other industries; Build a factory-owned water plant; Soft water and pure water production system; Industrial cooling water circulation system; Mine water purification treatment system. In the process of filtration, raw water flows in from the water inlet, enters the inside of the filter cartridge, and then passes through the filter barrel from the inside out. Impurities are intercepted on the inner wall of the filter cartridge, and filtered water flows out from the water outlet. When the impurities on the inner wall of the filter cartridge accumulate more and more, a filter cake is formed on the inner surface of the filter cartridge, and a pressure difference is gradually formed inside and outside the filter cartridge. When the pressure difference reaches the preset value of the pressure difference controller, the self-cleaning process will be started. Self-cleaning process The self-cleaning process of the water filter is completed by the suction sweeper and the drain valve which move spirally along the inner surface of the filter cartridge. The open drain valve makes the front end of the suction nozzle of the suction scanner produce a high backwashing speed, forming a vacuum, and the filter cake attached to the inner wall of the filter cartridge is sucked out of the body. The whole cleaning process takes about 60 seconds, and the system keeps flowing during the cleaning process. S-series suction scanner has the function of scanning point by point, which makes the cleaning more thorough. Control mode Self-cleaning filter has three functions: pressure difference/time/manual. At the same time, we specially designed the priority control function for you, that is, in any case, as long as the system pressure difference reaches a predetermined value, the equipment will start the self-cleaning function, thus better ensuring the normal operation of your system. Scope of application Industrial filtration: filtration of source water, cooling water, reclaimed water, bypass filtered water, circulating water of refrigeration and heating system, cooling water and frozen water in chemical industry, steel industry, paper industry, power plant, automobile, mining industry and water plant; Protect the nozzle; Tertiary treatment of sewage; Urban water reuse; Workshop water; Pre-system filtering, etc. ; Application of irrigation filtration: groundwater; Municipal water use; Rivers, lakes and seawater; Orchard; Nursery; Greenhouse; Golf course; Parks, etc.