A high-temperature dust-laden gas dedusting, desulfurization and denitrification integrated device and method

Abstract

An integrated device and method for dust removal, desulfurization and denitrification of high-temperature dust-laden gas. Aiming at the problem of sulfide gas (SOx) and nitrogen oxide (NOx) gas pollution in high temperature flue gas, the invention combines dust removal technology with desulfurization and denitrification catalytic technology to form an integrated filtration treatment equipment for high efficiency dust removal and desulfurization and denitrification. Among them, the glass phase change material wraps ceramic balls to adsorb and strengthen the particle layer to filter and dedust high-temperature flue gas ultra-fine dust, forming high-temperature "dust-free" gas, eliminating the impact of dust on the desulfurization and denitrification process; and then using porous alumina ceramic balls As a catalyst carrier, the porous alumina ceramic balls are impregnated with metal oxides as active substances, and cerium oxide as a co-catalyst to achieve desulfurization and denitrification of high-temperature flue gas; the third is to achieve dynamic and continuous dust removal and denitration through system process design Desulfurization and denitrification, online effect control and regeneration with dust removal and catalytic functions.

Description

[0001] technology [0002] The invention relates to a device and method for dust removal, desulfurization and denitrification, and in particular to an integrated device and method for dust removal, desulfurization and denitrification of high-temperature dust-laden gas Background technique [0003] China is the largest manufacturing country in the world, of which steel, nonferrous metals, petrochemicals, building materials and other industries have a larger proportion. These industries emit a large amount of industrial flue gas during the production process. These flue gases not only contain a large amount of dust, but also certain harmful gases such as nitrogen oxides (NOx) and sulfur oxides (SOx), which become the main source of air pollution. For industrial flue gas treatment, in addition to filtering and dedusting the dust in the flue gas, it is also important to perform desulfurization and denitrification treatment on the flue gas to achieve environmental protection compl...

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Problems solved by technology

[0015] To sum up, it can be concluded that the current desulfurization and denitrification technology needs to solve the following problems: first, dust particles and other impurities covering the catalyst and desulfurization and denitrification agent will cause a certain degree of deactivation and reduce the reaction efficiency; This not only leads to the reduction of flue gas treatment efficiency, but also makes the replacement of the filter device difficult, which also makes the cost investment high and has a great impact on production; the third is the treatment of the generated by-products and desulfurization and denitrification The problem of regeneration of reagents is more complicated and requires higher cost; fourth, there is high cost consumption for the use and storage of desulfurization and denitrification reagents. Generally, alumina pellets or activated carbon are used as catalyst carriers, and the disadvantage is that they are easy to wear and consume. As the base material, it will be more wear-resistant; fifth, the flue gas treatment devices used in industrial production now rarely can intelligently control the dust removal and desulfurization and denitrification process equipment and efficiency according to the flue gas conditions, so that the best use of resources cannot be achieved; Sixth, there is currently no integrated device for dust removal, desulfurization and denitrification, and most of the three functions are operated separately, resulting in a lack of overall coordination among various equipment units, resulting in unnecessary losses and waste

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