Conversion device of desulfurized and denitrified side products of active-coke flue gas, desulfurizing and denitrifying system and method

Abstract

The invention belongs to the technical field of environmental protection, and relates to an integrated purification technology of flue (waste) gas, in particular to a conversion device of desulfurized and denitrified side products of active-coke flue gas, a desulfurizing and denitrifying system and a method. The conversion device comprises an absorbing tower, an alkali preparation unit, an intermediate-product storage tank, a neutralizing kettle, an evaporator, a concentrated-material tank, a centrifugal unit and a drying device, wherein the absorbing tower is provided with a gas inlet end which is connected with a output end of sulfur-dioxide gas released in the desulfurizing and denitrifying system of the active-coke flue gas; and the alkali preparation unit, the absorbing tower, the intermediate-product storage tank, the neutralizing kettle, the evaporator, the concentrated-material tank, the centrifugal unit and the drying device are connected in sequence. The conversion device, the desulfurizing and denitrifying system and the method have the advantages that the production additional value of the desulfurizing and denitrifying system of the active-coke flue gas can be increased, and the economic benefit can be improved, so that the economic and environment-friendly effects are achieved; the process is simple, the layout is compact, the energy consumption is low, and no waste water, solid waste and secondary pollution are caused, so that the resource recycling is realized.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to flue gas (waste) gas integrated purification technology, in particular to an active coke flue gas desulfurization and denitrification by-product conversion device, desulfurization and denitrification system and method. Background technique [0002] With the development of human social economy and the acceleration of industrialization, the smoke (waste) gas discharged from iron and steel metallurgy, non-ferrous metal smelting, coal-fired thermal power, chemical building materials and combustion boilers contains a large amount of SO 2 , NO x and other harmful gases, causing serious atmospheric sulfur pollution and acid rain hazards. Although after the construction of flue gas desulfurization during the "Eleventh Five-Year Plan" period, my country's SO 2 , NO x Emissions have dropped to a certain extent, but in the "Twelfth Five-Year Plan" and a longer period in the...

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Problems solved by technology

However, with the help of parsed SO 2 Concentrated sulfuric acid, a by-product of gas preparation, often has the following problems in practical applications: due to the different conditions in different regions, the demand for sulfuric acid is also different, so it will cause difficulties in the sale of sulfuric acid in some regions, resulting in low economic benefits, And it will also cause some pollution to the environment

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