Energy-saving type vacuum device

Abstract

The invention relates to an energy-saving type vacuum device. The energy-saving type vacuum device comprises a condenser, a condenser hot well, a steam condensing mother pipe, a first water ring vacuum pump system, a steam condensing branch pipe, a steam condensing pipeline check valve, a steam condensing pipeline flow meter, a steam condensing pipeline pressure transmitter, a steam condensing pipeline thermal resistor, a steam condensing pipeline isolating valve, a steam condensing pipeline pneumatic valve, a power steam adjusting valve, a steam ejector, a tubular heat exchanger, a steam trap, a hydrophobic pneumatic valve, a contact pneumatic valve, a contact isolation valve and a second water ring vacuum pump. According to the energy-saving type vacuum device, the first water ring vacuum pump system is replaced by the tubular heat exchanger and the small-power second water ring vacuum pump, thus the vacuum of the condenser can be maintained and provided, the condenser is guaranteedto be in the optimum working condition, the influence of environmental temperature changes is avoided, stable pumping capacity of the condenser is kept all the time, the vacuum degree of the condenseris improved, the power generation coal consumption of a unit is reduced, the operation power consumption of a vacuum pumping system is reduced, operation of the system equipment is reliable and safe,the maintenance workload is small, the cavitation phenomenon is avoided, and the phenomena of high noise and vibration are avoided.

Description

technical field [0001] The invention relates to the technical field of vacuuming, in particular to an energy-saving vacuum device and a control method thereof. Background technique [0002] Condenser is one of the important equipment of thermal power generating set, and the vacuum value of condenser has an important influence on the economy of turbo-generating set operation. There are many factors that affect the vacuum of the condenser, among which the most direct impact is vacuum tightness, cooling water temperature, cooling water volume, and the working characteristics of the water ring vacuum pump. At present, the condenser vacuum pumping system of domestic 300MW and above generator sets mostly adopts 2 or 3 water ring vacuum pump units, and the water ring vacuum pump has the following disadvantages: [0003] 1. The temperature of the working fluid of the water ring vacuum pump is greatly affected by the temperature of the cooling water, and the ambient temperature is a...

AI Technical Summary

Problems solved by technology

Under vacuum conditions, a large amount of working fluid of the water ring vacuum pump vaporizes to cause cavitation, and then problems such as vibration and noise occur. The suction characteristics of the water ring vacuum pump are greatly reduced, and the dry air in the condenser cannot be pumped out in time. Affect the vacuum of the condenser, seriously affecting the safe and stable operation of the unit and the economy of operation;

[0004] 2. In the traditional vacuum system of the unit, the water ring vacuum pump is configured according to the requirements of the unit to establish a vacuum. The operation of the equipment consumes a lot of power. Under the condition of maintaining the vacuum of the unit, there is a lot of room for consumption reduction;

[0006] 4. The water ring vacuum pump is a rotating device, the wear of the impeller and the occurrence of cavitation phenomenon, the workload of daily maintenance is very large

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