Treatment to ensure compliant discharge of calcium carbide supernatant in PVC production

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To address the issue of calcium carbide slag generated in PVC production, PVC manufacturers now equip themselves with cement production facilities; cement production has specific requirements regarding the sulfur content in this slag (and no bypass ventilation systems are used to reduce energy consumption). For calcium carbide derived from high-sulfur raw materials, it is difficult to meet the sulfur requirements for calcium carbide slag in cement production by carrying out desulfurization treatment on the acetylene generation supernatant 【new dry-process cement requires that the total sulfur content in calcium carbide slag be ≤1% (on a SO3 basis)】. Therefore, if the approach of adding fresh industrial water to the acetylene generator is considered to solve this issue, the calcium carbide supernatant cannot be used. So how can the calcium carbide supernatant containing acetylene be effectively treated to meet the requirements for compliant discharge? This post was last edited by sgh1966 on 2009-4-8 23:16]