System and method for continuous and constant blowdown energy collection of boiler

Abstract

The invention discloses a system and method for continuous and constant blowdown energy collection of a boiler. The system for continuous and constant blowdown energy collection of the boiler comprises a flash tank and an energy collector, wherein the flash tank is connected with a continuous blowdown outlet of the boiler through a continuous blowdown pipeline and connected with a constant blowdown outlet of the boiler through a constant blowdown pipeline; the energy collector is connected with a steam outlet of the flash tank through a steam pipeline; a three-stage heat exchanger is arrangedin the energy collector; a water outlet is connected with a water inlet of the boiler through a water outlet pipeline; and a steam distribution chamber is connected with the steam pipeline through a steam inlet formed in a cylinder. Waste water of the boiler is recovered through the energy collector and then is treated in the flash tank to form steam, water is heated through steam energy, most part of the steam is condensed, and a small part of non-condensed gas is exhausted through an oxygen outlet. The recovery rate of the heat of steam which is continuously or constantly exhausted can reach99%, the heat-exchange efficiency is high, and the energy-saving effect is good; and the system and method for continuous and constant blowdown energy collection of the boiler have the advantages that energy is saved, consumption is reduced, environmental friendliness is achieved, and noise pollution is avoided.

Description

technical field [0001] The invention relates to the field of boiler blowdown equipment, in particular to a boiler continuous and fixed discharge energy collection system; the invention also relates to a method for energy collection by using the aforementioned energy collection system. Background technique [0002] During the operation of the boiler, with the evaporation of water, various impurities in the water are continuously concentrated in the drum (steam drum). In order to ensure the normal operation of the boiler, it is necessary to control the concentration ratio (concentration of impurities in the boiler water) through continuous sewage discharge. . The boiler water discharged by continuous blowdown is usually saturated water under corresponding pressure, which contains a lot of heat energy. Continuous blowdown not only loses a lot of heat energy, wastes fuel, but also may cause thermal pollution and noise. Boilers in most power plants use continuous expansion vesse...

AI Technical Summary

Problems solved by technology

However, continuous expansion vessels cannot cool the sewage to below 100°C. For systems using high-pressure deaerators, the outlet water temperature of continuous expansion vessels is still as high as 140-180°C, and the recovered heat energy is limited.

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