FRP centrifugal pump failure reasons and troubleshooting: failure phenomenon troubleshooting reasons 1, the pump does not water a, import and export valves are not open, out of the pipeline blocked, flow impeller blockage. b, the motor is running in the wrong direction, the motor phase loss is very slow. c, suction tube leakage. d, the pump is not filled with liquid, the pump cavity with air. e, imported insufficient water supply, suction stroke is too high, the valve leaks. f, pipe resistance is too large, improper pump selection. a, check, remove the blockage. b, adjust the motor direction, tighten the motor wiring. c, tighten the sealing surface, remove leakage. d, filled with liquid and open the exhaust valve, drain the air. e, downtime, inspection, adjustment (water pipe or suction pipe with easy to use this phenomenon). f, reduce pipe corners, re-select the pump. 2, insufficient pump flow a, first press 1. Cause check. b, pipes, pump impeller blockage, scale deposition, the valve opening is not enough. c, the voltage is low. d, impeller wear. a, first press 1. exclude. b, remove the blockage, readjust the valve opening. c, regulator. d, replace the impeller. 3, the power is too large a, more than the rated flow. b, suction is too high. c, pump bearing wear. a, adjust the flow, off the small outlet valve. b, reduce. c, replace the bearing. 4, noise vibration a, unstable pipe support. b, liquid mixed with gas. c, produce cavitation. d, bearing damage. e, the motor overload heating operation. a, a solid pipeline. b, improve suction pressure exhaust. c, reduce the degree of vacuum. d, replace the bearing. e, adjust press 5. 5, the motor heat a, flow is too large, overload operation. b, rub rub. c, motor bearing damage. d, the voltage is insufficient. a, off the small outlet valve. b, check and exclude. c, replace the bearing. d, regulator. 6, pump leaking a, mechanical seal wear. b, sand or cracked pump body. c, sealing surface is not flat. d, Loose mounting bolts. a, replace. b, welding repair or replacement. c, trimming. d, fastening.
Coal and coke
Coal is a naturally-found fossil fuel that is formed by the anaerobic decay of plant life taking place over millions of years. The energy released when the fuel is burned comes from the initial solar energy that remains stored in the hydrocarbons contained in coal. Coke is what remains when the impurities in coal, such as coal-tar and coal-gas, are removed by high temperatures in an oxygen-free furnace. The absence of oxygen during the process prevents the coal from burning. Unlike coal, coke can be burned with little or no smoke.
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