Method for recycling heat energy in low-temperature smoke containing SO3 and dust
A low-temperature flue gas and heat energy recovery technology, applied in chemical instruments and methods, lighting and heating equipment, preheating, etc., can solve problems such as blockage of heat pipe equipment, limited heat recovery, corrosion, etc., to reduce working pressure and increase economical Benefit, the effect of reducing the amount of evaporation
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[0018] Example 1 Using the method of the present invention to recover heat energy
[0019] The invention can be modified in the existing sulphuric acid system and can also be popularized in the newly built production system. The applicant uses pyrite (sulfur concentrate) to make acid, a production line with an annual output of 20,000 tons of sulfuric acid, and after the flue gas from the pyrite sulphuric acid process is removed by electrostatic precipitator (about 300℃), it is resistant to dilute acid The gas pipeline of the liquid-gas heat exchanger made of corrosive and temperature-resistant materials, after the flue gas heat exchange, it absorbs SO by the power wave purification device, packed tower and other equipment 3 After discharge, absorb SO 3 The acid solution obtained after cooling is used in the acid making process. After the production water passes through the water treatment equipment, the soft water that comes out passes through the liquid pipeline of the liquid ga...
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