A method for preparing coal-fired flue gas desulfurization and mercury removal agent with tartaric acid as raw material

Abstract

The invention relates to the technical field of coal-fired flue gas sulfur and mercury removal, in particular to a method for preparing a coal-fired flue gas sulfur and mercury remover from tartaric acid serving as a raw material. By heating, water adding, hydrothermal treatment and pulverization of pyrolusite, effective components in the pyrolusite are activated; and under the joint action of the tartaric acid and copper oxide powder, the rate for removing sulfur oxide and elemental mercury from the flue gas by the sulfur and mercury remover is improved, and the sulfur and mercury removal efficiency is up to 92 percent or above.

Description

technical field [0001] The invention relates to the technical field of coal-fired flue gas desulfurization and mercury removal, in particular to a method for preparing a coal-fired flue gas desulfurization and mercury removal agent using tartaric acid as a raw material. Background technique [0002] At present, my country's sulfur dioxide emissions have ranked among the top in the world, becoming the third largest acid rain area in the world, and the damage caused by acid rain has gradually increased every year, reaching more than 100 billion yuan. The source of sulfur dioxide is mainly sintering flue gas, and Most of the sintering flue gas also contains mercury components, so that when sulfur dioxide enters the air and forms acid rain, mercury components also enter the environment, and mercury is a toxic heavy metal component, which enters the environment with rainwater Afterwards, it is easy to enter the organism and convert into methylmercury in the organism, and methylmerc...

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Problems solved by technology

[0002] At present, my country's sulfur dioxide emissions have ranked among the top in the world, becoming the third largest acid rain area in the world, and the damage caused by acid rain has gradually increased every year, reaching more than 100 billion yuan. The source of sulfur dioxide is mainly sintering flue gas, and Most of the sintering flue gas also contains mercury components, so that when sulfur dioxide enters the air and forms acid rain, mercury components also enter the environment, and mercury is a toxic heavy metal component, which enters the environment with rainwater Afterwards, it is easy to enter the organism and convert into methylmercury in the organism, and methylmercury can greatly affect the metabolism of the organism, leading to threats to the health of the organism

[0003] Therefore, it is necessary to desulfurize and demercurize sintering flue gas; for desulfurization, most of the desulfurization at home and abroad is still dominated by wet desulfurization, and wet desulfurization accounts for more than 85%. Limestone-gypsum method and sodium desulfurization are generally used Alkali method, etc. These methods not only have high investment and operating costs, but also easily scale and block equipment during the desulfurization process, and the price of by-products after desulfurization is low, and the waste residue has little application value and is likely to cause secondary pollution; therefore, desulfurization technology is gradually Appeared semi-dry and dry desulfurization process

For mercury removal, it mainly involves mercury removal before combustion, mercury removal during combustion and mercury removal after combustion. Mercury removal in these three stages mainly involves mercury removal without dedusting equipment, adsorbent mercury removal, catalytic oxidation mercury removal, Wet flue gas desulfurization device for mercury removal, solution absorption method for mercury removal, however, for mercury removal in flue gas, the technology is still in an unsatisfactory state

[0004] According to statistics, the technology currently used in industrial desulfurization and mercury removal has a low removal rate for simultaneous removal of sulfur and mercury, most of which are maintained at about 80%, resulting in the vast majority of sulfur and mercury in the flue gas. Component emission, causing environmental pollution, in view of this, this researcher studies flue gas desulfurization and demercuration, uses tartaric acid as one of the raw materials, and uses it in the field of flue gas desulfurization and demercuration, providing a a new way of thinking

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