System and method for achieving low-temperature simultaneous desulfurization, denitration and dedusting of flue gas of gas-fired boiler

Abstract

Provided are a system and method for achieving low-temperature simultaneous desulfurization, denitration and dedusting of flue gas of a gas-fired boiler.The invention aims at solving the problem that at present, when burning is conducted through a gas-fired boiler, exhaust of dust, sulfur dioxide and nitrogen oxide in flue gas is substandard.The invention provides the system and method for achieving low-temperature simultaneous desulfurization, denitration and dedusting of the flue gas of the gas-fired boiler.The system comprises an absorption tower, an ozone generator, a gas distributer, a chimney, an oxygen supply pump, an ammonia water supply tank, an oxidation air blower, a residue storage tank, a catalyst separation and recovery system, a liquid fertilizer storage tank and a circulating pump; for the treatment effect, high desulfurization rate, denitration dedusting rate and dedusting rate are achieved; the system is low in investment cost, low in energy consumption and convenient and rapid to use.

Description

technical field [0001] The invention relates to a system and method for low-temperature denitrification and cooperative desulfurization and dust removal of gas-fired boiler flue gas. Background technique [0002] The treatment of gas-fired boiler flue gas emission has always been an indispensable part of the field of environmental protection. The gas-fired boiler flue gas emission pollutants are mainly sulfur dioxide, nitrogen oxides and dust. Sulfur dioxide is a colorless and transparent gas with a pungent odor. In the atmosphere, it will be oxidized into sulfuric acid mist or sulfate aerosol, which is the main substance that forms acid rain. Nitrogen oxides mainly refer to nitric oxide and nitrogen dioxide. Nitrogen oxides mainly damage the human respiratory tract, and nitrogen dioxide is also one of the causes of acid rain. Under sunlight, due to the action of ultraviolet rays, a series of photochemical reactions often occur between nitrogen oxides, hydrocarbons and ozo...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the flue gas dust, sulfur dioxide, and nitrogen oxide emissions are not up to standard after the combustion of the gas-fired boiler. The flue gas produced at low temperature can achieve a desulfurization rate of over 99%, a denitrification rate of over 90%, and a dust removal rate of over 60%. This system has low investment costs, low energy consumption, and is easy to use.

Images