Secondary filter, automatic secondary filter, electric second filter

A second filter, an overview of the environment is more serious as rivers, lakes and other water pollution outstanding. Filtered water through a filter, there are many suspended solids and organic matter, therefore, the second filter system is then purified water contamination, keeping the condenser water chamber often in a clean state, to ensure the normal operation of plastic sphere, improve gum ball recoveries indispensable means. Our company is the production of electric power auxiliary equipment sentinel plants, through the past few years continue to solicit the views of the majority of users and the secondary filter of repeated trial and continue to improve, so the second filter structure and performance more perfect, and is widely used 6MW 300MW thermal power generating units to open-cycle cooling water system, the praise of new and old customers. Second, fixed and rotary two secondary filter Features Currently the power plant condenser circulating water system is more commonly used, through years of operation proved the existence of the following main problems: 1, fixed characteristics : fixed core network can not rotate, clean up dirt poor, mesh easy to plug, cleaning down to wait. 2, Rotary features: network core rotation, cleaning negative backlash against the strainer strong decontamination capacity than fixed, but the peak season when the goods more serious water pollution, and water containing plastic film. When weeds and other sticky dirt overlooking the strong force, the cleaning effect is still not ideal, such as the case when the sewage chamber blade wear serious, clean-up effect is even worse, there is a big drawback of the structure: (1) Driver Network core A pair of size gear perennial water containing sediment and other impurities in operation, easy to wear and corrosion, seriously affecting the safe and economical operation of the unit. (2) The drive control system is more complex, generally by controlling the solenoid valves, pumps, tanks, fuel tanks, motor oil, oil control box and other components, run among the most prone to oil spills, control failure phenomenon. (3) the maintenance, repair workload. The presence of the secondary filter for the shortcomings, the company through research and repeated trial system is designed to power rotary kick secondary filter, is currently the best performance of the second filter, which has the following characteristics: 1, core network drive gear and circulating water cut off, the lubrication system is fully enclosed to open the form, the gear is no longer water, sediment and other impurities to wear and erosion. 2, to eliminate the transmission of complex fault prone shortcomings exist in the old second filter, fixed line safe, reliable, easy repair and maintenance. Third, the structure and working principle of rotary electric kick secondary filter form structures such as Figure 1, which is mainly composed of: ⑴ ⑵ stainless steel housing core network transmission ⑶ ⑷ ⑸ sewage gear doors and other five components. How it works: circulating water through the trash rack and a mesh filter still contains a lot of suspended solids and sediment and other impurities, after circulating pump into the secondary filter filtered, when suspended solids in water and sediment and other impurities in the filter When attached to a certain number of the internal and external water pressure filter is increased to a predetermined numerical control system (typically 500mmH2O column), start control system to use, sewerage agencies to work, the discharge secondary filter attachments, to be within at the pressure returned to normal (usually ≤400mmH2O column) control mechanism closes the cycle, thus completing the filtration of sewage works. Fourth, the standard model (see table) Specifications Model Diameter DN (mm) suitable for steam turbine power (MW) design temperature design pressure explanatory notes EPF-500 500 N6 80 ℃ 0.6MPa backwash water: not more than 5% of the total water cycle ~ 10% of the backwash interval (setting): 1 to 24 hours adjustable backwash time (setting): 0-10 minutes adjustable EPF-600 600 N12 EPF-700 700 N12-25 EPF-800 800 N25 EPF -900 900 N25-50 EPF-1000 1000 N50 EPF-1200 1200 N50-100 EPF-1400 1400 N100 EPF-1600 1600 N100-200 EPF-1800 1800 N200-300 EPF-2000 2000 N300 EPF-2200 2200 N300 than five, Installation and precautions 1) the second filter can be installed in a horizontal condenser imports can also be installed in the circulation pump outlet, the same effect. 2) import filter straight pipe length should be greater than the circulating water pipe diameter. 3) The installation can not tilt, connected to a solid. 4) filters and traps it, keep the circulation tube inlet spacing of 100mm or more, and the installation of compensation between the screen and the condenser section, easy assembly and disassembly repair and compensation. 5) After installation, the need to eliminate circulating water filter in front of all the debris, put into operation before, and for running test. VI Ordering Information 1. Provide takeover diameter, pressure and steam turbine power. 2, the design value of the circulating water flow and water impurities. Impurities in the water cycle is what the majority of the impurities. Should the change provided by the installation program needs to take over the diameter, the original copy of the screen drawing.