An indirect air-cooling unit high back pressure heating system and adjustment method

Abstract

The invention discloses an indirect air cooling unit high back pressure heat supplying system and an adjusting method. The system mainly comprises a steam turbine intermediate pressure cylinder, a steam turbine low pressure cylinder, a high back pressure steam condenser, a low back pressure steam condenser, a circulating water pump, an indirect air cooling tower, a thermal net plate type heat exchanging device, a thermal network circulating water pump, a front-mounted thermal net steam condenser, a steam jetting device steam condenser, a peak heating device, a vapour jetting device and the like. According to the system, first stage heating is conducted on thermal net back flowing water by using the thermal net plate type heat exchanging device, secondary heating is conducted on the thermalnet back flowing water by the front-mounted thermal net steam condenser, third-stage heating is conducted on the thermal net back flowing water by using the steam jetting device steam condenser, fourth-stage heating is conducted on the thermal net back flowing water by using the peak heating device, and the gradient utilization of the energy is achieved by four-stage heating of the whole system.The system has the advantages that the technological converting is simple, the cost is low, the converting on the steam turbine body is not needed, the defect of larger end difference of panel type heat exchanging device is overcome, compared with traditional indirect air cooling unit high back pressure heat supplying converting, the dead steam utilization rate of the unit after application is improved, and equipment initial investment is reduced.

Description

technical field [0001] The invention relates to a heat supply system, in particular to an indirect air-cooling unit high back pressure heat supply system and an adjustment method. Background technique [0002] In recent years, due to the country's emphasis on environmental protection and water conservation in the construction of power projects, air-cooled units using air as the cooling medium have developed rapidly in power construction. Air-cooled units are widely used in North China, Inner Mongolia, Xinjiang and other places in my country, effectively solving the problem of power generation in areas rich in coal and poor in water. With the operation and promotion of the air-cooling system of power stations in my country, the system has gradually reached a consensus on its advantages such as no need for cooling water, large heat transfer temperature difference, simple system, flexible and reliable air volume adjustment, strong corrosion resistance, and small footprint. Comp...

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Problems solved by technology

[0009] 1. The condensers are operated with hot network water on one side and circulating water on the other side, resulting in the inability to fully utilize the heating potential of the unit, and only use about half of the exhaust steam heating capacity

[0010] 2. If the hot plate heat exchanger is used for water-water heat exchange, the plate exchange area needs to be large, and the cost will increase greatly

[0011] 3. Due to the upper end difference of the plate heat exchanger, to ensure the same outlet water temperature, it is necessary to maintain a higher back pressure operation, which will affect more power generation due to the higher back pressure operation of the unit

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