Absorption process and equipment for smelting flue gas emissions
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Our factory is a gold smelting enterprise, and currently the sulfuric acid exhaust emissions exceed the allowed levels; we are in urgent need of a complete set of processes and equipment for exhaust gas absorption. The sulfur dioxide content in the exhaust gases is 0.08%, and the sulfur trioxide content is 0.05%. I hope experts can recommend suitable processes and equipment. Thank you
Reply to 1# zyh929208: OP, speak more quietly – don’t get caught by your environmental protection agency! Hehe, you get it! Yesterday, I saw an exhaust gas treatment system at a sulfuric acid production facility; it worked quite well. Ammonia water was used for absorption, and the exhaust gas treatment was effective. However, the quality of the produced anhydrous sulfuric acid and anhydrous sulfurous acid wasn’t good enough, so they couldn’t be sold at a proper price!
Reply to 1# zyh929208: Is your acid mist level too high? The absorption system also has big problems!
This post was last edited by txglyl on 2012-6-17 21:21. We use a turbulent flow washer combined with electric exhaust mist removal; no solid waste is generated, and the performance is good. The absorbent used is soda ash
We use liquid caustic to absorb sulfur dioxide to produce sodium sulfite
How effective is the exhaust gas electrostatic demisting system? Please share! Thank you
From the perspective of the equipment itself, its quality is good; the secondary voltage and current values are within normal ranges, and no problems have occurred after one year of operation. However, in terms of the processing technique used, electric scrubbing of exhaust gases does not have much effect on controlling them – control still relies mainly on the three main processes that come before it. If there are issues with the equipment and processes prior to this stage, exhaust gases will still be emitted.
Absorbed with ammonia, it provides excellent exhaust gas treatment results; moreover, the sulfuric acid produced with a catalyst can be used as a raw material for manufacturing compound fertilizers.
We designed a system to absorb sulfur dioxide using inorganic salts, and then to convert that sulfur dioxide back into sulfuric acid within the sulfuric acid production process, thereby increasing the sulfur recovery rate. At the same time, inorganic salts return to the system for reabsorption. This method is similar to the organic amine method, but requires much less investment.
Is it a slurry feed? If that’s the case, sodium salts need to be added during slurry preparation (as you know), so liquid alkali is used to absorb the exhaust gases; meanwhile, regular opening of the system for slurry preparation serves a dual purpose.