Flue gas desulfurization agent and method for flue gas desulfurization

Abstract

The invention discloses a flue gas desulfurization agent and a flue gas desulfurization method thereof. Expressed by weight percentage, the flue gas desulfurizer is composed of 10-80% of red mud, 5-50% of aluminum ash, 5-70% of fly ash and 5-30% of waste carbon powder. First, weigh various raw materials according to the composition ratio of raw materials, mix them evenly, and obtain a mixed material; press the mixed material into a prism, and a gas channel is provided in the middle of the prism; the prism is assembled in the desulfurization equipment, and the desulfurization equipment is connected to the flue gas pipeline. The flue gas generated in the flue gas pipeline is passed into the desulfurization equipment to fully contact with the desulfurizer for desulfurization; after measurement, the desulfurized gas meets the national emission standards and is discharged. The invention utilizes the respective characteristics of red mud, fly ash, aluminum ash and waste carbon powder, and mixes them as a desulfurizing agent, which can effectively remove sulfur dioxide in flue gas, and the desulfurization rate reaches over 90%. The invention treats waste with waste, has low desulfurization cost, high sulfur dioxide removal rate, and is beneficial to industrial scale-up.

Description

technical field [0001] The invention relates to a flue gas desulfurization technology, in particular to a method of using industrial solid waste as a flue gas desulfurizer and using the desulfurizer for desulfurization, that is, the invention relates to a flue gas desulfurizer and its flue gas Desulfurization method. Background technique [0002] Sulfur dioxide in flue gas is extremely harmful to animals, plants and the ecological environment, especially for low-concentration sulfur dioxide. Due to its large content in flue gas and low treatment benefits, its effective treatment has become a major problem for a long time. Currently governing SO in the world 2 The main technical means of pollution is flue gas desulfurization. There are more than 200 kinds of flue gas desulfurization technologies researched, developed and used in various countries, of which about 20 kinds have been industrialized, and wet desulfurization is the main method. Absorbent absorbs sulfur dioxide i...

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Problems solved by technology

[0007] Most of the absorption equipment in the above-mentioned existing technology is tower equipment, which has problems such as large equipment volume, large floor space, high operating costs, and the product after desulfurization cannot be effectively treated; and during alkaline desulfurization, the consumption of alkali solution is large, and the cost of desulfurization is high. The widely used ammonia desulfurization method uses gaseous ammonia as the absorbent. The cost of gaseous ammonia accounts for about 80% of the operating cost of the entire device. The value of its by-product ammonium sulfate is not high, resulting in most desulfurization devices operating at a loss, and the enthusiasm of enterprises is not high.