Processing Machinery
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PVC Processing Smoke and Acid Gas
Problem Phenomenon
Pungent sour smoke appears in the workshop, operators feel throat discomfort, and signs of rust may appear on equipment surfaces.
Cause Analysis
PVC decomposition releases HCl gas; when overheated, resident too long, or stabilizer exhausted, it escapes in large quantities, both endangering personnel health and forming hydrochloric acid with water vapor to corrode equipment — a dual alarm of quality and safety.
Solution
①Immediately reduce processing temperature; ②Check whether the stabilizer system has failed; ③Strengthen workshop exhaust ventilation; ④Clean degraded material in the barrel; ⑤Monitor actual melt temperature and set alarms; ⑥Evacuate personnel and stop for maintenance if necessary.
Key Takeaway
PVC acid gas = 'HCl leakage': cooling + ventilation + checking stabilizer is the emergency three-piece set; this is both a quality problem and an occupational health and equipment safety problem, it must be treated as an accident hazard, not endured stubbornly.
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