The Occupational Health Management in Coal Chemical Plant

Скачать презентацию The Occupational Health Management in Coal Chemical Plant

33856dd750722a98ba89c2482d5fb926.ppt

Количество слайдов: 45

The Occupational Health Management in Coal Chemical Plant in CSC Chuan-Fang Li, Shih-Ping Cheng, Pao-Yin Lu, Pao-Hong Tong November 22, 2010 © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 1

Outline Introduction 2. Operation and production processes in coal chemical plant 3. Occupational health management 4. Occupational management practice in each process 1. 5. Conclusion © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 2

1. Introduction Coal chemical plant is the chemical plant of ironmaking factory in CSC with four major processes of coke oven gas(COG) purifying, coal tar recycling, H 2 S/NH 3 removing, and light oil recycling. Raw COG, produced in the dry distillation of coal, is cooled down, purified. The impurities such as coal tar, sulfur and light oil in the process of purifying are recycled. Purified COG is used as power source and coal tar, sulfur and light oil are piped or transported by tank cars to the downstream as basic chemical raw materials for the high economic value. 3 © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved.

2. Operation and production processes in coal chemical plant Coal chemical plant is set up with boilers, pressure vessels, COG holders, coal tar tanks, light oil tanks, and sulfur tanks. Purified COG is used as power source in CSC, and coal tar and light oil are piped to China Steel Chemical Corporation(CSCC), and sulfur is transported to CSCC by tank cars. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 4

3. Occupational health management Process identification assessment Hazard analysis Physical examination Environmental management Workplace measurement Operation management Coal tar recycling process H 2 S/NH 3 Removing process Light oil recycling process Hazard distribution Equipment maintenance work © 2010中國鋼鐵公司著作權所有 Occupational health study control Improvement measure Copyright 20010 by China Steel Corporation All rights reserved. 6

3. 3 Occupational health management measures i. Enhance patrol plan. ii. Active engineering improvement. iii. Alarms should be installed in all areas where COG might build up in a release. iv. A respiratory protection program and special protective equipment for some operations should be instructed for employees. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 9

v. The employer should supply and launder the work clothing for employees, and provide showers and separate lockers for street and work clothes. vi. Measures should be taken to eliminate or reduce the escape of hazardous substances during maintenance operations, sampling for laboratory analysis, and truck loading. vii. Coal tar slag buckets should be enclosed to reduce leaks. viii. Other management measures such as training, on-site supervisor inspection and regulations of wearing protective equipment to reduce hazard exposure. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 10

3. 4 Occupational health management information system Category Hazardous Materials Management System Working Environment Measurement Management System Special Physical Examination Tracing System Subsystem MSDS management Main Function As a sharing platform, for users to upload and download MSDS. Periodic registering For users to register usage and storage quarterly. Application system Management system for results Tracing system for exceeding control value a. Apply for working environment measurement demands. b. Upload results of workplace surveillance. c. Fill in improvement and control measures on line. Special physical examination identifying system Apply for special physical examination. Tracing system for exceeding control level a. Upload results of special physical examination. b. Fill in improvement and control measures on line. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 11

Category Subsystem Main Function OSH training Hazard identification and risk assessment Other Supporting management Systems a. Upload and look up training records. b. Remind training effectiveness. Upload and look up record of hazard identification and risk assessment Management program Trace progress of hazard elimination and risk reduction. Workplace regulation Register, upload and bulletin workplace regulation. Inspection a. Register inspection record. b. Tracing progress of improvement measures. Ionizing radiation equipment a. Management of ionizing radiation equipment. b. Periodic registering. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 12

4. Occupational management practice in coal tar process 4. 1 Hazard identification l Physical hazards: noise l Chemical hazards: coal tar, sulfuric acid ¡ Route of exposure: inhalation and skin contact © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 19

4. 3 Improvement and control measures: Enclosed equipment Use exhaust system for ventilation in pump room © 2010中國鋼鐵公司著作權所有 Slag buckets are capped Copyright 20010 by China Steel Corporation All rights reserved. 23

4. 3 Improvement and control measures: Noise reduction Results of noise monitoring in workplace near screw-type air compressor are lower than reciprocating type. (80 -85 d. BA and 90 -92 d. BA, respectively) © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 24

5. Occupational management practice in H 2 S/NH 3 Removing process 5. 1 Hazard identification l Physical hazards: noise l Chemical hazards: coal tar, sulfuric acid l Ergonomic hazards: operation of heat exchange of exposure: inhalation, skin and eye contact ¡ Route © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 25

5. 3 Improvement and control measures: isolation and remote control Exhaust pipeline is equipped with valves for manually open to increase exposure risk. © 2010中國鋼鐵公司著作權所有 Valves in pipeline are changed to pneumatic valve for operation in control rooms to decrease exposure risk. Copyright 20010 by China Steel Corporation All rights reserved. 28

5. 3 Improvement and control measures: automation and mechanization Heat exchange equipment is changed from manual operation to automation. © 2010中國鋼鐵公司著作權所有 On-site sampling is automated. Copyright 20010 by China Steel Corporation All rights reserved. 29

6. Occupational management practice in Light oil recycle process 6. 1 Hazard identification l Physical hazards: noise, ionizing radiation l Chemical hazards: benzene, toluene and xylene l Ergonomic hazards: operation of heat exchange of exposure: inhalation and skin contact ¡ Route © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 30

6. 3 Occupational health study l Coal chemical plant health risk study coordinated with academia in 2007 -2008, for a two-year period research of benzene exposure and heath assessment, and improvement and control program. The conclusions of this study are summarized as follows: © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 34

6. 3. 1 Working environment measurement l In comparison with the results of workplace monitoring analyzed by both academia and authorized institute, we find out all the results are far lower than permissible exposure limit. It shows that occupational health management in coal chemical plant maintains a certain level, effectively eliminate or reduce the emission of harmful substances to reduce employee exposure. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 35

6. 3. 2 Analysis of physical examination data l Physical examination data analysis based on historical results shows that the major abnormal physical examination items focus on cardiovascular system and abnormalities of hearing and abdominal ultrasound inspection. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 36

6. 3. 3 Reproductive health assessment l The reproductive health assessment projects, including semen volume, sperm concentration, sperm motility and sperm normal morphology of high exposure group (operators) and low exposure groups (maintenance personnel and administrative staff) in coal chemical plant shows that all the data fit the average proportion of WHO reference values. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 37

6. 4 Improvement and control measures: enclosed equipment Improvement to reach completely closed sampling system. © 2010中國鋼鐵公司著作權所有 Replacement of seal valve to bellow seal type to reduce emission from seal valve. Copyright 20010 by China Steel Corporation All rights reserved. 38

7. Occupational management practice in equipment maintenance work 7. 1 Hazard identification l Physical hazards: noise l Chemical hazards: coal tar, sulfuric acid, hydrogen sulfide, ammonia, benzene, xylene, toluene of exposure: inhalation, skin and eye contact ¡Route © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 39

7. 2 Evaluation method of workplace and employee exposure The results of environmental monitoring in maintenance work are the same as results in other processes. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 40

7. 3 Improvement and control measures: l Contractors, as our partner, account for a large part of the maintenance staff and management of them is very important. Contractors are asked to prepare the necessary protective equipment such as safety helmets, safety shoes, safety glasses, masks, ear plugs and safety belts and strictly put personal protection into practice in accordance with regulations to avoid the hazards of exposure © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 41

7. 3 Improvement and control measures: l Enhance patrol plan. Once find gas leaking, inform the operation unit and fix it at once. l Other control measures: Keep records of on-job training and on-site supervisor inspection especially for employees wearing of protective equipment. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 42

8. Conclusion and prospects in the future a. According to the results of working environment measurement over the years and conclusion of occupational health study, results analyzed by both academia and authorized institute, concentrations of harmful substances in the air of coal chemical plant are far lower than permissible exposure limits. Therefore, we can confirm data of workplace monitoring is reliable and effectiveness of occupational health and safety management in coal chemical is remarkable © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 43

b. The integration and data links of different systems are key points to promote occupational health management of coal chemical plant in CSC. © 2010中國鋼鐵公司著作權所有 Copyright 20010 by China Steel Corporation All rights reserved. 44