Anhydrous calcium chloride flue gas waste heat reusing and whiten-eliminating system

Abstract

The invention provides an anhydrous calcium chloride flue gas waste heat reusing and whiten-eliminating system which comprises a boiling granulating tower, a GGH heat exchanger, a flue spraying system, an induced draft fan, a flue gas cooling and condensing system, a mechanical draft cooling tower, a cooling water pump and a chimney, wherein the flue gas cooling and condensing system is connectedwith the mechanical draft cooling tower and the cooling water pump to form a cold cycle; an outlet of the boiling granulating tower is connected with the GGH heat exchanger; an inlet of the flue spraying system is connected with the GGH heat exchanger; an outlet of the flue gas cooling and condensing system is connected with the GGH heat exchanger; an inlet of the chimney is connected with the GGHheat exchanger; flue gas is cooled after sequentially passing through the boiling granulating tower, the GGH heat exchanger, the flue spraying system, the induced draft fan and the flue gas cooling and condensing system, then is heated up by the GGH heat exchanger, and finally is discharged from the chimney. The system fully utilizes the waste heat of the original flue gas to heat the net flue gas, and uses the net flue gas to cool the original flue gas, so that the energy consumption is minimized, and the treated flue gas is discharged from the chimney without white smoke.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of flue gas whitening, in particular to an anhydrous calcium chloride flue gas waste heat recovery and whitening system. [0003] 【Background technique】 [0004] In the chemical industry, the flue gas produced by the anhydrous calcium chloride boiling prilling tower absorbs a large amount of water vapor due to the concentrated calcium chloride solution sprayed through the flue, and produces a large amount of white smoke when discharged, causing visual pollution. affect the corporate image. In recent years, the pollutant discharge requirements of the chemical industry have become more and more stringent, but there is a certain degree of lag in its whitening technology and requirements. [0005] At present, for the white smoke discharged from the anhydrous calcium chloride boiling prilling tower, the common white removal process equipment is the spray tower, and the condensation range of the flue gas ...

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Problems solved by technology

[0004] In the chemical industry, the flue gas produced by the anhydrous calcium chloride boiling prilling tower absorbs a large amount of water vapor due to the concentrated calcium chloride solution sprayed through the flue, and produces a large amount of white smoke when discharged, causing visual pollution. Affect corporate image

In recent years, the pollutant discharge requirements of the chemical industry have become more and more stringent, but there is a certain degree of lag in its whitening technology and requirements

[0005] At present, for the white smoke discharged from the anhydrous calcium chloride boiling prilling tower, the common white removal process equipment is the spray tower, and the condensation range of the flue gas is very limited, and because of the lack of flue gas reheating process, the white removal effect is general

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