Novel integrated apparatus for conditioning and desulphurizing flue gas by dry method

Abstract

The invention relates to a novel integrated apparatus for conditioning and desulphurizing flue gas by a dry method. The apparatus comprises the following components: a glass melting cellar, a first cooling device, an adsorption and dust collection device, a first desulphurization apparatus, a centrifugal dust collector, a denitration apparatus, a second desulphurization apparatus, an atomizer, a waste residue processing apparatus, a chimney, a first liquid storage tank, a second liquid storage tank, a third liquid storage tank, an air tank and a heat exchange device, wherein the heat exchange device is internally provided with a high temperature heat exchange apparatus, a middle temperature heat exchange apparatus, and a low temperature heat exchange apparatus from up to bottom in order; and the glass melting cellar is connected to the adsorption and dust collection device by the first cooling device, the adsorption and dust collection device is connected to the centrifugal dust collector by the first desulphurization apparatus, the centrifugal dust collector is connected to the second desulphurization apparatus by the atomizer, and the second desulphurization apparatus is connected to the chimney by the denitration apparatus. Waste heat of flue gas is absorbed, and the absorbed heat is stored and supplied for the devices, so that resource is effectively saved, loss of heat is avoided, and production cost is effectively reduced.

Description

technical field [0001] The invention relates to a flue gas treatment device, in particular to a novel flue gas dry conditioning and desulfurization integrated device. Background technique [0002] Glass melting furnace is an industrial furnace with high resource consumption, high pollutant emission and high energy consumption. In the production process of flat glass in my country, heavy oil, natural gas, coal gas, etc. are mainly used as fuel, and the flue gas contains a large amount of soot, SO 2 And NOx and other pollutants, the discharge of pollutants has caused serious pollution to the atmosphere. In order to improve the environment and strictly control the emission of pollutants in the exhaust gas, my country began to implement the "Emission Standard of Air Pollutants for the Flat Glass Industry" (GB26453-2011) from October 2011, which clearly stipulates that the emission of nitrogen oxides (NOx) is less than 700mg / Nm3, SO 2 The emission is lower than 400mg / Nm3. [...

AI Technical Summary

Problems solved by technology

At a specific temperature, sodium sulfate reacts with gaseous sulfur trioxide in the flue gas to produce highly viscous, highly corrosive dust. big trouble

Catalytic reduction denitrification technology is used for denitrification of flue gas in glass melting furnaces. Due to the influence of flue gas and dust, the catalyst is easily blocked and the active components are reduced, which increases the difficulty of cleaning

[0004] At present, domestic flue gas desulfurization technology is mostly wet desulfurization, desulfurization wastewater needs to be further treated, desulfurization waste residues are not fully utilized, and waste residues can only be used as road fillers after pressure filtration, which is not conducive to the recycling of resources; The concentration of sulfur oxides in the flue gas is generally low, and the investment cost is high if the sulfur oxides are treated separately

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