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How to improve the low vacuum pump?
Market users have reported that they purchased the vacuum pump failure, "ejector can not be invested" the largest proportion, resulting in limited vacuum pump output, affecting the improvement of condenser vacuum. On the economy of the unit greater impact on the 6th season when the pump can not be put into the vacuum pump, vacuum pump output is limited, resulting in poor condenser vacuum, now eliminate the vacuum pump "injector can not be put" failure to improve the output of complete sets of equipment to enhance Condenser vacuum 0.8kPa during cold season. How to improve the low vacuum pump? First, the vacuum pump injector can not be put into the cause analysis: 1, ejector bypass valve leakage 2, mechanical wear increased 3, mechanical wear increased 4, maintenance and repair is not in place 5, maintenance and repair is not in place 6, overhaul standards 7, the cooling water temperature in the cold season is high 8, the ejector gas source contains too much water 9, the ejector flow control improper detection found that the main reason is: injector bypass valve without internal leakage phenomenon, the injector surface temperature is stable, Not lower than 0 ℃. Check the injector bypass valve before and after the temperature difference reached 8 ℃ ~ 15 ℃, indicating serious leakage within the valve, a direct impact on the vacuum pump output unit, the injector wall temperature from room temperature to -15 ℃ drastic changes. Condenser vacuum followed by sharp fluctuations, check the injector inlet pipe contains a lot of water. Second, the solution: 1, jet air source to a relatively small atmosphere of humidity. Ejector air source connected to the atmosphere and install manual isolation valve and filter. 2, In order to eliminate the valve leakage, repair modified valve, the rationalization of the replica check valve transformation, the use of high reliability pneumatic rubber butterfly valve to eliminate internal leakage. After the realization, the comparison of the results shows that after the vacuum pump D is modified, the injector is put into normal operation. Under the load of 558MW, the vacuum of the B side condenser increases by 0.88 kPa and the exhaust temperature decreases by 2.77 ° C. The transformation of the input cost of 100,000 yuan, coal consumption decreased 1.8g / kWh, saving 5184 tons of coal per year, saving 2.3 million yuan in power generation costs, reducing CO2, SO2 emissions. (Editor: Li Juan) Recommended reading: fluid machinery free generation mining services