White elimination system in waste heat recovery for fixed-displacement capacity expander in thermal power plant, and working method thereof

Abstract

The invention discloses a white elimination system in waste heat recovery for a fixed-displacement capacity expander in a thermal power plant, and a working method thereof. The white elimination system in waste heat recovery for the fixed-displacement capacity expander in the thermal power plant comprises an outlet condensed water pipeline of a unit condensed water pump, a cooling water shut-off valve, a heat exchanger, a water return shut-off valve and a unit condensed water system, wherein the outlet condensed water pipeline of the unit condensed water pump communicates with one end of the cooling water shut-off valve; the other end of the cooling water shut-off valve communicates with a heat-absorption side inlet of the heat exchanger; a heat-absorption side outlet of the heat exchangercommunicates with the unit condensed water system through the water return shut-off valve; and an emptying pipeline of the fixed-displacement capacity expander is taken as a heat release side of theheat exchanger. The system and the working method thereof are capable of recovering low-grade heat energy in the emptying pipeline of the fixed-displacement capacity expander, and achieving the purpose of white elimination.

Description

technical field [0001] The invention belongs to the technical field of whitening in thermal power plants, and relates to a whitening system for waste heat recovery and whitening of fixed-arrangement expansion vessels in thermal power plants and a working method thereof. Background technique [0002] With the vigorous implementation of national energy conservation and emission reduction policies, thermal power plants have gradually strengthened the use of waste heat from power plants to reduce energy consumption and save costs. The more stringent, many power plants have strengthened the management of running, emitting, dripping and leaking. There is low-grade steam coming out of the emptying pipe of the fixed-row expansion vessel, which causes white smoke. At present, the thermal power plant directly discharges this part of the low-grade steam. This wastes part of the heat energy, and will cause visual pollution and affect the corporate image. Therefore, strengthening the use...

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Problems solved by technology

[0002] With the vigorous implementation of national energy conservation and emission reduction policies, thermal power plants have gradually strengthened the use of waste heat from power plants to reduce energy consumption and save costs. The more stringent, many power plants have strengthened the management of running, emitting, dripping and leaking. There is low-grade steam coming out of the emptying pipe of the fixed-row expansion vessel, which causes white smoke. At present, the thermal power plant directly discharges this part of the low-grade steam. In this way, part of the heat energy is wasted, and it will cause visual pollution and affect the image of the company. Therefore, strengthening the use of this part of the heat energy can not only save energy, but also improve the image of the company.

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