Two-way energy storage and coal consumption reduction system for thermal power generating unit

Abstract

The invention relates to a two-way energy storage and coal consumption reduction system for a thermal power generating unit. The two-way energy storage and coal consumption reduction system comprises a jet condenser. The top end of the jet condenser communicates with an exhaust pipeline. The bottom of the jet condenser communicates with a condensed water tank and a heat storage tank. The heat storage tank communicates with a regenerative system of a steam turbine. The bottom of the condensed water tank communicates with a cold storage tank. The cold storage tank is connected with multiple nozzles arranged in the jet condenser through a pipeline sequentially provided with a circulating cooling water pump, a third regulating valve and a sixth regulating valve. The cold storage tank communicates with a cooling and mixing device communicating with the exhaust pipeline through another pipeline sequentially provided with the circulating cooling water pump, a third regulating valve and a seventh regulating valve. The two-way energy storage and coal consumption reduction system has the beneficial effects that the design is reasonable, the pressure in the air-cooling condenser is lowered effectively, the vacuum of the unit in the operating process is improved, the operating economy of the unit is improved, the operating safety and reliability of a steam turbine unit are improved, the fatigue loss of a steam turbine rotor is reduced, the service life of the rotor is prolonged, and on the premise of meeting the safe operation of the unit, energy saving and emission reduction are truly achieved.

Description

technical field [0001] The invention relates to the field of circulating water cooling, in particular to a two-way energy storage and coal consumption reduction system for a thermal power unit. Background technique [0002] With the steady and rapid development of my country's economy, the demand for energy consumption in the whole society is gradually expanding, and the demand for electric energy in the manufacturing industry dominated by light and heavy industries is increasing day by day. The pressure of economic transformation has also made the original south of the developed areas of the manufacturing industry gradually complete the transfer to the north's new and old industrial areas, and the extension of the manufacturing industry chain. In order to ensure the successful transfer of industrial enterprises from south to north and provide sufficient energy support, the northern region has vigorously developed the power industry since 2000, especially in Shanxi, Inner Mo...

AI Technical Summary

Problems solved by technology

In actual operation, direct air-cooled thermal power units will have problems of high back pressure and frequent fluctuations in back pressure in summer, and the vacuum can reach more than 40kPa, which will have a great negative impact on the stable operation and economy of the unit

The current solution is mainly to increase the area of ​​the original direct air cooling tower and the wet peak cooler. The cost of adding a direct air cooling tower is high and cannot solve the problem of vacuum fluctuations. Although the cost of the wet peak cooler is slightly lower, it is in operation. It needs to consume a lot of water resources to achieve the purpose of reducing back pressure, and the external spray cooler consumes a lot of demineralized water, which is contrary to the original intention of water saving in establishing a direct air cooling unit

Images