Evaluation of Occupational Hygiene in the Coking Enterprise
Objective To explore occupational risk factors and hazard degrees,evaluate the protective effects,and take reasonable and feasible protective measures.Methods Through field investigation and engineering analysis,occupational risk factors were identified and confirmed in the production process.Concentrations(intensities) of risk factors were determined and results were analyzed by statistics.According to the national laws and standards,hazard levels and protective measures were evaluated.Results(1) In the coking enterprise,the main occupational risk factors were dust,noise,high temperature,heat radiation,carbon monoxide(CO),sulfur dioxide(SO_2),nitrogen oxides(NOx),ammonia(NH_3),benzene,toluene,xylene,phenol,cyanide,coke oven emissions,benzo(a) pyrene and so on.(2) In the monitored workplaces,seven occupational risk factors(CO,SO_2,NOx,benzene,toluene,xylene and phenol)accorded with national occupational health standards.(3) Dust and noise seriously exceeded national standards,50% of samples exceeded national standards in dust,and 31.6 of samples exceeded in noise.(4) The concentrations of benzo(a) pyrene mostly exceeded national standards,84.6 of samples exceeded national standards.Conclusion Through effective protective measures,the enterprise strengthens occupational health management,actively propagates the protective knowledge of occupational diseases,and improves workmen's self protective consciousness.Meantime,in workplace,the related department ought to monitor occupational hazards and health surveillance of workmen periodically,stringency and rescue's management and prevention of installment in the coking plant.Concentrations of occupational hazards and protective measures can control basically under national occupational health standards and correspond the demands related to national regulations.