Flue gas desulfurization efficiency enhancing agent for wet flue gas desulfurization system, and preparation method and application of flue gas desulfurization efficiency enhancing agent

Abstract

The invention discloses a flue gas desulfurization efficiency enhancing agent for a wet flue gas desulfurization system. The agent comprises the following components in percent by weight: 65 to 75 percent of adipic acid, 1 to 10 percent of sodium adipate, 10 to 20 percent of succinic acid, 1 to 10 percent of sodium succinate, and 1 to 10 percent of glutaric acid; a preparation method of the flue gas desulfurization efficiency enhancing agent comprises the following step: mixing and uniformly stirring the formula amount of adipic acid, sodium adipate, succinic acid, sodium succinate and glutaric acid, so as to obtain the flue gas desulfurization efficiency enhancing agent; and the flue gas desulfurization efficiency enhancing agent is applied to wet flue gas desulfurization systems configured to units, with the furnace coal sulphur content being greater than 1.2 percent. The flue gas desulfurization efficiency enhancing agent can greatly reduce the power consumption rate of the units, and reduce the power generation cost; a devulcanized PH value can be controlled to be in a low level; scales formed in an absorption tower can be effectively reduced; the oxidation effect of the absorption tower can be improved; the use ratio of limestone can be improved; the agent can effectively prevent foam from being produced in the absorption tower; and the agent does not have toxicity.

Description

technical field [0001] The invention relates to a flue gas desulfurization efficiency-enhancing agent used in a wet desulfurization system, a preparation method and application thereof, and belongs to the field of desulfurization technology. Background technique [0002] The limestone-gypsum wet flue gas desulfurization process is widely used because of its mature technology, high desulfurization efficiency, abundant sources of absorbent, low price, and availability of by-products. It has become the most widely used process for flue gas desulfurization in coal-fired power plants. [0003] However, at present, the operation of limestone-gypsum wet flue gas desulfurization devices in thermal power plants in my country generally has high energy consumption and operating costs, poor adaptability to coal sulfur content, serious blockage and fouling of subsequent equipment in the absorption tower, and serious equipment wear And other issues, with the instability of my country's coa...

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Problems solved by technology

[0003] However, at present, the operation of limestone-gypsum wet flue gas desulfurization devices in thermal power plants in my country generally has high energy consumption and operating costs, poor adaptability to coal sulfur content, serious blockage and fouling of subsequent equipment in the absorption tower, and serious equipment wear and tear. And other issues, with the instability of my country's coal market, many power plants have been burning coal that exceeds the design sulfur content for a long time, resulting in the desulfurization system not operating normally. With the implementation of increasingly stringent environmental protection emission standards, many desulfurization devices have been Forced to carry out capacity expansion work

After the technical transformation, the plant power consumption rate of the unit increased, which increased the coal consumption of the unit

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