Waste heat recovery system for deaerator and power plant power generation system

Abstract

The invention discloses a waste heat recovery system for a deaerator. The waste heat recovery system comprises a first leading pipe and a heater, wherein the first leading pipe is communicated with an auxiliary pipe of a continuous steam discharge pipe in the deaerator; the auxiliary pipe is provided with a fastening valve which is close to an exhaust port end of a main pipe of the continuous steam discharge pipe, and an orifice of the auxiliary pipe is close to the other end of the main pipe; the first leading pipe is disposed between the orifice and the fastening valve; and the heater is provided with a heat source working medium channel and a heated working medium channel, and the heat source working medium channel is communicated with the first leading pipe through the second leading pipe. According to the waste heat recovery system for the deaerator, waste heat of dead steam of the deaerator can be fully utilized, energy waste is avoided, and energy saving and emission reduction in power plant production are facilitated. The invention further discloses a power plant power generation system using the waste heat recovery system for the deaerator. Waste of dead steam waste heat of the deaerator can be avoided, and energy saving and emission reduction can be achieved.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization, more specifically, to a waste heat utilization system for a deaerator, and also to a power plant power generation system. Background technique [0002] A power plant is a power plant that converts some form of raw energy into electrical energy for fixed facilities or transportation. Taking thermal power plants as an example, please refer to figure 1 and figure 2 , the power generation system of the power plant mainly includes: boiler, deaerator, steam turbine, generator, feed water preheater and steam seal heater. After being heated by the boiler, it is transported to the boiler, and is heated at the boiler to form gaseous water vapor. The water vapor reaches the steam turbine and makes the steam turbine drive the generator to rotate to generate electricity. The water vapor is discharged from the cylinders of each pressure level of the steam turbine. The steam is condensed into...

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Problems solved by technology

However, in the above-mentioned deaerator, the non-condensable gas overflowing from the condensed water will carry a large amount of water vapor after gas-liquid separation, and the two will mix to form exhaust steam, and the exhaust steam contains a large amount of heat, which will cause energy loss after being directly discharged into the atmosphere. Waste is not conducive to the power plant to achieve the production goal of energy saving and consumption reduction

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