Acid regenerated flue gas treatment method and system

A flue gas treatment system and flue gas treatment technology, applied in the field of acid regeneration flue gas treatment and acid regeneration flue gas treatment system, can solve the problem of affecting the heat exchange efficiency and normal use of heat exchangers, the effect of dust content is not very obvious, and the graphite Heat exchanger graphite block hole blockage and other problems, to achieve the effect of eliminating psychological discomfort, excellent emission indicators, and reducing air volume
CN109569205APending Publication Date: 2019-04-05WISDRI ENG & RES INC LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WISDRI ENG & RES INC LTD
Publication Date
2019-04-05

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Abstract

The invention relates to an acid regenerated flue gas treatment method and system. The system comprises an absorbing column, a waste acid washing column, a venturi washing column, a spraying cooling column, a secondary washing column, a dust collector and a discharge chimney which are connected in sequence through a flue gas pipeline. A waste acid spraying unit is arranged in the waste acid washing column; acid regenerated flue gas is cooled by a venturi preconcentrator; the cooled flue gas is subjected to acid absorption in the absorbing column; dust collection is performed via the waste acidwashing column; the flue gas with the dust removed is washed via the venturi washing column to remove part of dust and acid mist in the flue gas; secondary washing is performed via spraying cooling;discharging is carried out after dust collecting, especially treatment via a wet electric dust collector. The waste acid washing column preheats waste acid during flue gas dedusting, so that operational energy consumption of an acid regeneration system can be reduced; the process is reasonable, the treated flue gas may reach good discharge indexes, and the discharged flue gas can gain white mist removal.
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Description

technical field

[0001] The invention belongs to the technical field of hydrochloric acid waste liquid regeneration treatment, and in particular relates to an acid regeneration flue gas treatment method and an acid regeneration flue gas treatment system. Background technique

[0002] Hydrochloric acid is an important industrial production product, widely used in cold rolling mills in the iron and steel industry, pickling section in the pipe industry, acid leaching system in the chemical industry, etching industry, etc. When the consumption of hydrochloric acid waste liquid is large, spray roasting method or fluidized bed method is generally used for treatment. The principle is: the concentrated waste acid liquid is sprayed into the high-temperature area of ​​the roaster (or other roasting equipment, such as a rotary kiln, etc.), and after high-temperature chemical heat treatment, the high-temperature roasting flue gas passes through the Venturi pre-concentrator (or other equi...

Claims

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