Accident area post the basic situation of the torch system is the acetic acid tail gas centralized venting combustion system, in addition to a large number of CO, trace iodomethane and other flammable gases, there are CO2, H2, N2 and other inert gases and steam for insulation, the torch system and ignition of long-lasting lamps in the liquefied petroleum gas storage tanks. Torch pipeline composition is complex and the proportion of changes in concentration with the system fluctuations is relatively large, its composition is easy to O2 mixed to form explosive mixtures, once the torch system explosion will directly affect the entire Hexi Industrial Park, including the main unit of acetic acid, acetic acid ice machine device area, acetic anhydride device area and the normal production of the filling workshop and safety, and may be around the middle of the acetic acid tanks, amine device area, urea device area, etc. pose a serious threat, if not controlled in a timely manner will be a serious threat. Serious threat, if not controlled in time will lead to a large number of CO diffusion in the main device air release, when the concentration in the surrounding air is high enough to the explosive mixing limit, the safety of the surrounding residents and post personnel will be very dangerous. This equipment is responsible for the synthesis position, the total control of each shift is staffed by 3 people, the person in charge of the post Zhou Xia. Field positions are staffed 3 people. Preservation of 20 people, the night shift 2 people, responsible for Jiang Hongjun. Second, the emergency equipment and hazardous media characteristics 1, emergency equipment: general control, on-site positions are equipped with gas masks and chemical protective clothing, air respirators and other personal protective equipment, the main device to the torch device along the way acetic anhydride device, filling plant have a fire hydrant, fire cannons, two (see the "fire protection system layout"). 2, protection, firefighting, rescue measures: protection: the explosion of torch system, there will be a large number of CO and trace iodine, the explosion will be a large amount of CO and trace iodine, and the fire will be a large amount of CO and trace iodine. There are a large number of CO and trace iodomethane leakage and air mixing, continuous combustion, and may cause the explosion of liquefied petroleum gas. Personnel must wear gas masks, oxygen respirators or air respirators from the upwind approach to the torch device, no protective facilities personnel are prohibited from entering the scene of the accident. Emergency escape from the explosion area, available wet towels and other blocking respiratory tract, temporarily prevent CO, iodomethane gas into the body caused by poisoning. A large number of CO, trace iodomethane leakage fire, open the torch device area of the fire pump to the torch explosion area spray foam fire water (such as liquefied petroleum gas storage tanks did not explode should be sprayed to the liquefied petroleum gas storage tanks to cool down fire water to prevent the explosion); contact the filling plant and acetic anhydride device to open the fire water system to the torch along the pipeline to cool down fire water to prevent the spread of fire caused by the venting of the pipeline to explode. Firefighters into the torch accident area first wear a good air respirator, etc., with fire water or dry powder fire extinguishers to extinguish the fire, pay attention to the firmness of the torch frame is safe, to prevent the collapse of injuries. Rescue measures: when there is poisoning and other injuries such as asphyxiation, firefighters should first wear a good air respirator into the accident area, carry the patient to a safe area with fresh air, and supply oxygen or artificial respiration for first aid, while notifying the medical unit to give professional rescue in a timely manner. 3, hazardous properties of dangerous goods: 3.1 Hazardous characteristics of hazardous substances CO: Carbon monoxide is odorless, tasteless, the explosion limit is 12.5%-74.2%, insoluble in water. Invasive pathway: inhalation. Health hazards: can make people die of asphyxiation, mild poisoning manifested as headache, dizziness, palpitations and weakness of the limbs. Severe cases of deep coma shock, accompanied by pulmonary edema, serious myocardial damage, resulting in death, typical carbon monoxide poisoning of patients with skin is often cherry red. Toxicity: the degree of toxicity hazard is moderate, the maximum allowable concentration in the workshop is 30mg/m3. Hazardous properties: flammable, form explosive mixture with air, can cause combustion and explosion when exposed to open flame and high heat.3.2 Characteristics of hazardous materials iodomethane: iodomethane is a colorless liquid with molecular weight of 141.9, and boiling point of 42.5°C. It can be inhaled, ingested or swallowed, and can be used in the treatment of other diseases. Invasion route: inhalation, ingestion, absorption through skin. Health hazards: Acute poisoning will cause headache, nausea, vision loss, speech difficulty, paralysis, coma and other symptoms. Chronic effects: severe burns to the skin, eyes and other organs, inhalation of vapors can irritate the respiratory system. Toxicity: a highly hazardous chemical, maximum allowable concentration in workshop 1mg/m3. Hazardous characteristics: its vapors mixed with air can form explosive mixtures, which can cause combustion and explosion when exposed to open fire and high heat. Fire hazard level: Class B. When an accident occurs, the person who found the accident will immediately report to the shift manager, workshop director and production dispatching room. The production dispatching room will contact the safety and environment department, quality department, fire department, hospital and related personnel to rush to the scene and notify the related personnel to pay attention to personal protection. When the accident level is higher, there are people trapped, casualties, the first discoverer can directly report to the fire department, first aid station, dispatching room. Workshop list of relevant posts, personnel phone numbers: YuFuhong: 13396276803 SongWangYi: 13396276884 FuAiJun: 13053403364 post phone: office: 5196 Dispatch room administrative phone: 5136, 5238; scheduling production phone: "0" technical group : 5428 Security and Environmental Protection Department: 5138 Security Class: ** Fire Brigade: 5237 Fire: 5119 Hospital Emergency: 5120 On-site: ** Social Emergency Telephone "120", fire phone "119" Fourth, the cause of the accident analysis and preventive measures 1, the possible causes of the accident: A. Combustible gases to reach the explosive range in the mixture (overhaul of fire equipment replacement is not qualified or string of gas and other unauthorized fire caused by the explosion, explosion around the fire caused by the explosion of the chain of explosions). B. static electricity across the connection, poor grounding. C. torch system operating errors or overpressure in the main device area equipment. E. torch pipeline has an opening to the atmosphere, inhalation of torch oxygen. F. torch backfire or flameout resulting in torch explosion. 2, the accident prevention measures: A. strict control of the process indicators, to maintain stable production, strict process discipline to ensure that the equipment is intact and use, and equipment, pipeline safety hazards found in a timely manner to overhaul the treatment of hidden problems. B. Check and test the static electricity in spring every year. B. Annual spring inspection and testing of static electricity across the grounding device, found that the problem is immediately rectified. C. Fire strictly implement the fire management system, strictly fire ticket for the ticket, the ticket within the safety measures to be implemented one by one (safety isolation, away from the gutter, clean up around the flammable, according to the time required to take samples to analyze, monitoring in place, etc.). D. Ensure that the equipment and pipeline safety accessories sensitive and reliable, and according to the plan for the maintenance. E. Site lighting is intact, post personnel in accordance with the "Fire Maintenance System" and "Accident Cabinet Management System", the fire fighting equipment, protective equipment inspection, maintenance, to ensure that the maintenance of standby. F. Workshop operators are required to take samples and send them for analysis on a regular basis, and the results will be reported to the main operator of the general control and the workshop technician in a timely manner, and any abnormalities in the workshop should be reported to the Safety and Environmental Protection Department in a timely manner. G. Strengthen professional skills training, safety education and accident drills to improve employee safety awareness, professionalism, sense of responsibility, ability to perform, so that employees in the ideological awareness, prevention should be implemented, and measures in case of accidents. V. Emergency procedures after the accident 1, after the explosion of the hazardous areas of acetic acid production plant area, ice machine device area, acetic anhydride production plant area, filling plant, water vapor station and the site area belonging to the posts that may affect the acetic acid intermediate tanks, three amines, 400,000 tons of urea, and the south side of the Tutun, etc. 2, after the explosion of the master control main operator quickly press the emergency stop button, close the high-pressure absorber tower venting Control valve FV3302, PV3312, dewatering tower venting control valve PV3201B, low-pressure absorption tower venting control valve PV3302, cut off the main device to the torch bleeder pipe bleed air, while closing the finished product tower venting control valve PV3202A, high-pressure CO tanks V105 venting control valve PV3115, propionic acid tanks venting control valve PV3213, acid tank venting control valve PV3205, etc., isolate the connection between the main venting pipe and the main device equipment, close the CO feed and high and low, pressure CO into the device valve, cut off the synthesis of raw materials CH3OH, the system emergency stop, will be independent of the tower. At the same time, manually open the south end of the venting main pipe and the flare separation tank V605 side N2, steam regulating valve FV3603 to the venting main pipe blowing inert gas and steam until the gas in the venting main pipe is not combustible, and then stop blowing. If there are people working on the site of the flare device, the shift supervisor will immediately organize the evacuation of the personnel. If the wind is blowing from the west, evacuate the personnel in the workshop boundary area as necessary, evacuate the personnel to the safety zone in the upwind direction, and prohibit unrelated personnel from entering the accident area of the flare device. Under the premise of safety work is guaranteed, post personnel should wear oxygen respirator on-site (at least two people peer) as far as possible to cut off the explosion pipeline related valves: if the torch feed line or torch head explosion occurs, then close the device to go to all the safety valves after the shut-off valve and the cut-off valve of the normal venting, the V605 liquid-phase sewage valves, isolation of the main venting pipe and the device, to prevent the impact of the flare mains on the device area. After the implementation of safety measures general parking treatment. Workshop safety officer, post manager, shift manager is responsible for accident handling and personnel organization, workshop production director is responsible for on-site guidance. After the accident occurred on-site personnel wear the appropriate protective equipment, such as no protective equipment at hand can be wet temporarily cover the mouth and nose, from the upwind to the safety channel to quickly evacuate, around the other workshop positions by the dispatching room notification, by the safety channel evacuation. When the post is evacuated, the main operation of each post counts the number of people in the post and reports to the shift manager. The post personnel may count the number of people outside the main control room. If any post personnel are absent, the shift leader will organize a rapid search and rescue under the condition of ensuring the safety of relevant personnel (general control and site operators). On this basis, the shift supervisor will report the absence of personnel and injuries to the workshop, relevant departments and other leaders. The team leader will organize relevant personnel (security, general control, on-site personnel) to set up corresponding alert areas at both ends of the road on the east side of the torch, at the entrance of the torch and outside the south wall of the torch when there is a northwesterly or southwesterly or northeasterly wind, and at the entrance of the torch when there is a southeasterly wind, and try to stay away from the accident area of the torch device and arrange for people to supervise it, and then set up the alert area according to the situation when the safety officer arrives at the scene. Notify the dispatch office to immediately contact the surrounding plants such as Vostok or villages to pay attention to personal protection, wear acid-proof protective masks or use wet hand towels to cover the nose and mouth away from the accident contaminated area. Contact the analysis of the surrounding area for testing, air CO concentration exceeds 30mg/m3, iodomethane concentration exceeds 1mg/m3 for the accident contaminated area, identified as the alert area. 3, when there are injured, poisoned, burned and other people in need of emergency rescue, rescue by the medical staff, medical staff did not arrive by the first aiders on the shift rescue. 4, the accident scene, prohibit all forms of fire. The surrounding areas and posts are prohibited from starting fire according to the CO concentration, including electrical sparks and other sources of ignition (the scene to ensure that the operation of the equipment stops, you can let the power plant in the distribution room to cut off the power, if the amount of CO leakage is large, the other devices should also be made to stop the car, power outage treatment. (This matter is notified by the shift supervisor to the dispatch office). 5, when the explosion, fire extinguished, there is no danger, the organization of post personnel wearing protective equipment (gas mask) contact the water car room neutralization pool position will torch the device area of fire water through the gutter recycling to the accident neutralization pool. Notify the dispatching office and the dispatching office to notify the affected area and lift the alert. The end of the emergency, according to the function department arrangement by the shift manager to set up a guard to protect the accident scene; the end of the investigation after obtaining the consent of the function department to clean up the scene and cleaning (recycling to avoid contamination of the surrounding environment). 6, when the accident level is higher or the personnel trapped in a serious situation should be immediately notified to the company, the start of the company's emergency response system.
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