They are desulfurization before turning off the light, desulfurization during turning off the light, and desulfurization after turning off the light. Among them, limestone is generally used to stop using desulfurization methods, so today's Hengneng will focus on the Jiangsu biological desulfurization equipment used in it.
The principle of biological desulfurization equipment is to add limestone to water to form a slurry, which can prevent sulfur dioxide and oxidation reactions in flue gas, generating calcium sulfate. After continuous reflection, calcium sulfate reaches a certain saturation, forming crystalline dihydrate gypsum. Then stop the dehydration treatment of these gypsum and stack them in the gypsum storage room. The flue gas after biological desulfurization can be discharged into the atmosphere through the chimney after passing through the mist eliminator and heat exchanger. The desulfurization efficiency of the flue gas treated by the desulfurization equipment can reach 95%.
This desulfurization method is so convenient. In addition to its own desulfurization principle, high-quality desulfurization equipment is also required. In order to better utilize the desulfurization effect, biological desulfurization equipment needs a certain degree of corrosion resistance, for the following reasons:
1. Chemical corrosion mainly refers to the chemical reaction between corrosive media in the flue and metal equipment at a certain temperature, generating soluble iron salts that corrode the equipment over time.
2. Electrochemical corrosion refers to the formation of a primary battery on the surface of metal equipment containing water and electrolytes, which generates current and can also cause corrosion after a period of time.
3. Wear and corrosion mainly refers to the residual solid particles in the flue, which will stop friction with the surface of the biological desulfurization equipment, update the surface from time to time, accelerate the corrosion process with the equipment surface, and make the equipment surface thinner.
It can be seen that the production of Jiangsu biological desulfurization equipment must pay attention to the design of equipment anti-corrosion performance, which also plays an important role in the entire biological desulfurization process.
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2023-05-11
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