## Project Background
The cold-rolled stainless steel pickling process employs a mixed acid (HNO3 + HF), which emits toxic gases such as NOx and HF. The original workshop ventilation system is outdated, leading to multiple complaints from operators regarding irritation in the eyes and throat.
## Implementation Plan
Deploy 18 sets of fixed dual-parameter detectors, YQGT-NOX and YQGT-HF, covering the acid tank edge, chimney gas collection hood, and lounge. The system is connected to the on-site local exhaust fan frequency converter, automatically increasing the exhaust air volume when the concentration is high.
– HF measurement range: 0-10ppm, resolution: 0.1ppm, probe located near critical workstations
– Data is integrated into the workshop safety monthly report, and a trend graph is automatically generated each month
– Equip each of the 5 acid pickling workers with a portable dual-gas detector equipped with an alarm whistle
## Implementation Effect
After being put into operation for three months, the health complaints from acid pickling workers have been eliminated, and the workshop has been included as a demonstration unit in the company’s ISO 45001 safety management system.
