Method and system for recycling smoke waste heat through absorption type heat pump

Abstract

A system for recycling smoke waste heat through an absorption type heat pump comprises a spraying tower, a wet desulphurization smoke inlet is formed in the bottom of the spraying tower, a cooled smoke outlet is formed in the top of the spraying tower, a spraying water inlet is formed in the upper portion of the spraying tower, and a spraying water outlet is formed in the lower portion of the spraying tower. The spraying water outlet is connected with a heating medium inlet of a plate heat exchanger, and the spraying water inlet is connected with a heating medium outlet of the plate heat exchanger. A loop is formed by a refrigerant outlet and inlet port of the plate heat exchanger and the cold end of the heat pump, and a loop is formed by the heat end of the heat pump and heat net return water. After smoke is heated, the smoke is sent to the bottom of the spraying tower and runs upwards to exchange heat with downward spraying water, heat is transmitted to the spraying water, and the cooled smoke is discharged from the top of the spraying tower. For the spraying water with the increased temperature, heat is transmitted to the cold end of the absorption type heat pump through the plate heat exchanger, under driving of a drive heat source, the heat pump recycles heat from the cold end for heating the heat net return water at the heat end, and the beneficial effects of high recycling efficiency, low energy consumption and environment friendliness are achieved.

Description

technical field [0001] The invention belongs to the technical field of industrial boilers and energy saving, and in particular relates to a method and a system for recovering waste heat of flue gas by using an absorption heat pump. Background technique [0002] Coal-fired power stations are the most important part of my country's power generation industry. Although the country has vigorously developed new energy construction in recent years and gradually controlled and reduced the number of new coal-fired power stations, the power generation of coal-fired power stations still accounts for 70% of the country's total power generation. In northern China, coal-fired power stations also play an important role in heating in winter. In recent years, with the acceleration of urbanization and rapid economic development, more residential areas and industrial enterprises have been built. At the same time, the policy of central heating has been gradually implemented. Accompanied by the...

AI Technical Summary

Problems solved by technology

Most of the sensible heat of the flue gas and the latent heat of vaporization of the water vapor in the flue gas have not been fully utilized

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