Seeking expertise in waste gas treatment. . . . . . . . . . .
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The project requires level 2 acid removal, namely through dry and wet methods. Parameters for the wet method: 1. Parameters of the flue gas to be treated: 1) Flue gas volume: 11221 Nm3/h (actual flue gas flow rate: 23479 m3/h). 2) Flue gas temperature: Inlet temperature: 155°C, maximum inlet temperature: 200°C, outlet temperature: 75°C℃； 3) Dust concentration at the inlet: 30 mg/Nm3 4) Concentration of acidic gases at the inlet: SO2 level of 1154 mg/Nm3 ； HCl content: 284 mg/Nm3 ； HF content: 70 mg/Nm3 ； 5) Emission standards for exhaust gases: The standards that the exhaust gases from this project must meet, in terms of mg/m3. Sequence Number, Pollutant, Value (mg/Nm3): 1. Sulfur dioxide (SO2): 300; 2. Hydrogen fluoride (HF): 7.0; 3. Hydrogen chloride (HCl): 70. Conditions: dry air, 0°C, pressure of 101.3 KPa, oxygen content of 11%, average value over a daily period. Dry-process parameters: 1. Parameters related to the treated exhaust gases: 1) Source of exhaust gases: Exhaust gases resulting from the treatment in the quenching tower system for hazardous waste; 2) Volume of exhaust gases: 11,161 Nm3/h (actual exhaust gas flow rate: 25,765 m3/h); 3) Temperature of exhaust gases at the inlet: ~195°C; 4) Dust concentration at the inlet: 2.5 g/Nm3; 5) Concentration of acidic gases at the inlet: SO2 concentration of 1,649 mg/Nm3 ； HCl content: 568 mg/Nm3 ； HF content: 84 mg/Nm3 ； 6) Emission limits for exports: Serial number, Pollutant, Value (mg/Nm3): 1 Sulfur dioxide (SO2): 1154; 2 Hydrogen fluoride (HF): 70; 3 Hydrogen chloride (HCl): 284; 4 Mercury and its compounds (expressed as Hg): 0.1; 5 Cadmium and its compounds (expressed as Cd): 0.1; 6 Arsenic, nickel and their compounds (expressed as As+Ni): 1.0; 7 Lead and its compounds (expressed as Pb): 1.0; 8 Chromium, tin, antimony, copper, manganese and their compounds (expressed as Cr+Sn+Sb+Cu+Mn): 4.0; 9 Dioxins: 0.5 TEQ ng/m3. Conditions: dry air, 0°C, pressure of 101.3 KPa, oxygen content of 11%, daily average value
The above are the main flue gas conditions... I would like to ask everyone for their opinions. . How should this part be handled?··························
Look into Topsoo and see if its catalytic oxidation process for sulfuric acid production can meet your requirements
We can help you first cool it down and then use an alkali for absorption, but the heavy metals are likely to remain in the waste residue
This post was last edited by xuexue0909 on 2012-3-20 at 13:54. If you haven’t found a satisfactory solution yet, you can contact me: Engineer Zhang from Jiangsu Sino-German Environmental Protection Equipment Co., Ltd., at 13837968379. Services include dust removal, desulfurization, denitrification, and mercury removal for flue gas treatment. Of course, it’s best to have an integrated solution that handles everything in one step; the ideal option is one that offers the best cost-effectiveness, lowest operating costs, and the most straightforward and reliable operation. This refers to highly efficient integrated technologies and equipment for dust removal, desulfurization, denitrification, and mercury removal.
Since it contains HF, it is likely that ordinary metal equipment cannot be used; it is recommended to use a graphite quencher for rapid cooling, followed by a wet scrubber (FRP) and a Venturi device for acid and dust removal Dust and heavy metals end up in wastewater, and then are filtered and recovered?
I’d like to see how you carry out the calculations and design, and how the selection of processes and equipment is determined. I also want to learn more knowledge from you
1. Dry acid removal uses slaked lime as an absorbent, which is sprayed into the flue or reaction chamber using high-pressure air to undergo neutralization reactions with HCl, SO2, and HF. If adsorption of heavy metals is to be taken into account, activated carbon powder is usually sprayed in simultaneously; a bag filter is required afterward to collect the resulting fly ash, which needs to be further processed. 2. Wet acid removal uses a diluted alkaline solution as an absorbent; by spraying this alkaline solution, neutralization reactions occur with HCl, SO2, and HF, thereby washing the exhaust gases. Based on your parameters, it should be dry acid removal first, followed by dust removal, and then wet acid removal.
The desulfurization project is quite large; haha, it’s a pity we don’t have such a project at the moment. We should learn more about it
We specialize in the treatment of VOCs, organic waste gases; if there is organic waste gas that needs to be dealt with, I can assist you.