Multi-stage hot-pressing type vacuum pumping system

Abstract

The invention provides a multi-stage hot-pressing type vacuum pumping system. The system comprises a power steam pressure stabilization tank, a multi-stage hot presser, a steam condensing device, valves and pipe parts, wherein the steam condensing device is matched with the hot presser, and the valves and pipe parts are used for connecting related units. The set of system adopts auxiliary steam as a power source, does not use service power and is simple to maintain; moreover, cooling water of the condensing device adopts condensed water of a main machine; drain water automatically flows to a hot well of a steam condenser stage by stage, so that afterheat of steam and the drain water can be utilized, and energy saving effect is improved; besides, a tail-stage condenser of the device is replaced with a gland heater, so the floor area of the equipment is reduced, and power plant reconstruction is facilitated.

Description

technical field [0001] The invention relates to a vacuum pumping system for a condenser in a power plant, in particular to a multistage hot-pressing vacuum pumping system. Background technique [0002] The function of the vacuum system of the power plant is to remove the gas that cannot be condensed in the condenser, including the air leaked into the system and the uncondensed water vapor, etc., so as to ensure the heat transfer effect of the condenser and avoid the deterioration of the vacuum of the condenser. , so as to ensure the safe and efficient operation of the unit. At present, power plants generally use a vacuum system based on water ring vacuum pumps. This system is easily limited by the temperature of the cooling water in actual operation, which affects the suction capacity of the system; and is limited by the limit suction capacity during operation. Due to the influence of the impeller surface, local water erosion is likely to occur on the surface of the impelle...

AI Technical Summary

Problems solved by technology

[0004] 1. The vacuum system of the water ring vacuum pump is noisy, the pump body is easy to cavitate, and the maintenance workload is heavy;

[0005] 2. The power consumption is high, and the suction capacity in the low pressure area decreases sharply;

[0006] 3. Poor recycling rate of heat and volume of water vapor pumped

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