A dry desulfurization superfine powder that realizes ultra-low emissions of flue gas, its manufacturing method and application

Abstract

A dry-type desulfurization ultra-fine powder that cooperates to realize ultra-low emissions of flue gas and its manufacturing method and application. It relates to the field of desulfurization. The present invention aims to solve the problem of desulfurization when using medium-high sulfur coal caused by the current limestone wet desulfurization and magnesium oxide wet desulfurization. If the emission cannot reach the ultra-low emission, it needs to cooperate or add other technical means, or the desulfurization ultra-low emission is unstable when using higher low-sulfur coal. Wet desulfurization technology has problems of high equipment investment, too many subsystems, high operating costs, high power consumption, high water consumption, large floor area, difficult treatment of solid waste gypsum and high cost of sewage treatment. The dry desulfurization superfine powder of the present invention is compounded by sodium bicarbonate, calcium hydroxide, magnesium stearate, calcium-based granular clay and iron ore. Desulfurization treatment is carried out in the reactor. It is most economical to achieve ultra-low emissions when using low-sulfur coal, and the operating costs for ultra-low emissions are increased when using medium-high sulfur coal, and ultra-low emissions can be achieved stably for a long time.

Description

technical field [0001] The invention relates to the field of desulfurization, in particular to a dry-type desulfurization superfine powder for synergistically realizing ultra-low emission of flue gas, a manufacturing method and application thereof. Background technique [0002] SO in existing flue gas 2 There are two categories of methods for pollution control (such as flue gas purification and desulfurization of coal-fired boilers, kilns, and power plant boilers). The first category is represented by the limestone-wet desulfurization process, which installs a desulfurization tower after the boiler dust collector and before the chimney. This type of desulfurization method belongs to non-standard design, non-standard processing, and non-standard installation. Therefore, design, processing, The installation period is long, the investment is huge, and the operating cost is high. Its desulfurization efficiency can reach ultra-low emissions or ultra-low emissions when it is rela...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems caused by the current wet desulfurization method when using medium and high sulfur coal, the desulfurization ultra-low emission is not up to standard or unstable, the equipment investment is too high, the operating cost is high, the power consumption is high, the water consumption is high, and the solid waste gypsum is difficult to handle. and the high cost of sewage treatment