Waste heat recovery system for hydrophobic expansion container of waste power plant

Abstract

The invention relates to the technical field of a hydrophobic expansion container of a waste power plant, and discloses a waste heat recovery system for the hydrophobic expansion container of the waste power plant. The top of the hydrophobic diffusion container is connected with a steam exhaust pipe, the steam exhaust pipe is connected with a heat exchanger, the heat exchanger comprises a shell pass and a tube pass, a steam inlet is formed in the top of the shell pass, a condensate water outlet is formed in the bottom of the shell pass, the tube pass comprises a desalted water inlet and a desalted water outlet, the steam exhaust pipe is connected with the steam inlet, the condensate water outlet is connected with a hydrophobic tank through a condensate water pipe, the desalted water inletis connected with a desalted water main pipe through a water inlet pipe, the desalted water outlet is connected with a water outlet pipe, a plurality of deaerators are connected to the water outlet pipe in parallel, desalted water in the desalted water main pipe can be heated by the heat exchanger and then fed into the deaerators. The heat exchanger can be used for recycling heat in steam discharged from the hydrophobic expanding container to the desalted water, condensate water formed by steam exhaust is returned to the hydrophobic tank and can be reused, the steam discharge of the hydrophobic diffusion container is effectively prevented from being directly discharged, the energy is saved, and the safe production is facilitated.

Description

technical field [0001] The invention relates to the technical field of drain expansion vessels of garbage power plants, in particular to a waste heat recovery system used for drain expansion vessels of waste power plants. Background technique [0002] The function of the drain expander is to expand the drain in the pressure drain pipeline to reduce the pressure, recover the drain, and reduce the loss of soda water. In many waste incineration power plants, the exhaust pipes of the drainage expanders in the steam turbine rooms pass through the walls and lead to the outside of the plant to be discharged directly to the air. A large amount of hydrophobic exhaust is directly discharged to the air through the exhaust pipes, resulting in the loss of steam, water and heat, and also affects the power plant. At the same time, in the design stage, the design institute has already selected the parameters of the expansion vessel according to the drainage parameters of the power plant. Wh...

AI Technical Summary

Problems solved by technology

In many waste incineration power plants, the exhaust pipes of the drainage expanders in the steam turbine rooms pass through the walls and lead to the outside of the plant to be discharged directly to the air. A large amount of hydrophobic exhaust is directly discharged to the air through the exhaust pipes, resulting in the loss of steam, water and heat, and also affects the power plant. At the same time, in the design stage, the design institute has already selected the parameters of the expansion vessel according to the drainage parameters of the power plant. When the design is changed in the later stage, the overload operation of the expansion vessel and the loss of soda and heat will occur. Further aggravation may also lead to personal injury of the inspectors in this area and increase the unsafe factors in the factory area

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