The object of safety management is the state management and control of all people, things and environment in production, and safety management is a dynamic management. The following are the key points of gas safety management in metallurgical enterprises that I have compiled for you. Welcome to read and browse.
I. General safety management contents
(a) it should be clear that specialized agencies are responsible for the safety management of gas, and equipped with corresponding professional and technical personnel and related testing equipment and protective equipment.
(two) should establish and improve the gas safety management system, such as regional management, education and training assessment, post operation inspection, professional inspection, maintenance management system.
(3) Personnel engaged in the production, storage, transportation, use, maintenance and overhaul of gas shall be trained in basic knowledge of gas safety, gas safety technology, gas inspection methods and emergency rescue technology for gas poisoning. Only after passing the exam can they be arranged to work at their posts.
Second, the content of safety management during maintenance
Maintenance mainly refers to the maintenance of recovery, storage, use and transportation system of coke oven, blast furnace and converter gas.
(1) Three plans should be made: one is the maintenance work plan; Second, stop gas and purging scheme; The third is the gas replacement scheme. The plan should include the organization and command organization; Contents and scope of overhaul; Maintenance procedures; Safety measures and emergency treatment. Relevant operations shall be licensed, safety confirmed, and records shall be strictly checked to ensure unified command and prohibition.
(two) the unit responsible for the construction must sign a safety production agreement with the owner, and at the same time be approved by the relevant departments and go through the relevant formalities. Construction enterprises should be responsible for their own safety work.
(three) before the implementation of maintenance, operators should be given targeted safety education and safety disclosure.
(4) Operators should wear portable carbon monoxide alarm. When the concentration of harmful gas in the working environment exceeds the standard or the oxygen concentration is insufficient, you should wear an air or oxygen respirator and set up a full-time guardian.
(five) the workplace should be equipped with escape and rescue channels. Conditional enterprises should organize fire engines and ambulances to stand by and watch the scene.
(six) the contents of the maintenance procedures shall not be changed, otherwise a new application must be made. After the completion of the project, the person in charge will sign for confirmation.
(7) Construction requirements:
1. The established single safety measures must be strictly observed in the construction, and the hot spot must be equipped with corresponding effective fire-fighting equipment and carbon monoxide detector; When working in gas equipment or pipeline, portable carbon monoxide detector and portable oxygen detector must be equipped, and contact call measures should be taken for safety confirmation; The time interval for staff to enter the facility for work is at least 2 hours, and they rest in places where there is no gas.
2. Dangerous operations with gas, such as blind plate pumping and blocking with gas, taking over with gas, replacing blast furnace sounding ruler, operating inserting plate, etc. , should not be carried out in a thunderstorm, also should not be carried out at night; During operation, the operator should wear positive pressure air respirator or isolated gas mask, and shall comply with the following provisions:
(1) The workplace should be equipped with necessary contact signals, gas pressure gauges and wind direction signs;
(2) There should be no fire source within 40 meters from the workplace, and fire prevention measures should be taken. Personnel unrelated to work should leave the operating point 40 meters away;
(3) Tools that do not generate sparks should be used, such as copper tools or iron tools coated with enough grease;
(4) The lighting device can only be installed at a distance of10m from the operating point;
(5) Gas operation should not be carried out in buildings and structures such as furnaces with high temperature sources.
3. When hot work such as gas repair welding is carried out, the positive pressure of gas in the pipeline must be kept not lower than 100Pa, and a suitable pressure gauge should be installed near the hot work point to continuously monitor the pressure, and the intercom should be used to keep in touch. If the specified pressure cannot be guaranteed, the operation should be stopped immediately.
(eight) stop gas should do:
1. Confirm all fire stations. In accordance with the provisions, use effective and reliable devices to close the inlet and instrument conduit valves, and use blind plates or glass valves to reliably cut off maintenance equipment and operating equipment. Open the exhaust pipe at the end to ensure that the internal gas is blown clean.
2. The terminal radiation should be 4m higher than the gas pipeline, equipment or platform, and not less than 10m from the ground. Radiation pipes that are not frequently operated in the workshop or within the range of 10m from the workshop must be higher than the eaves of the building, and they should stand at the upper air outlet when operating. When necessary, a warning zone should be designated near the radiation exit, and there should be no fire source in the zone, and attention should be paid to the gas not to escape into the surrounding houses.
3. When the blast furnace gas pipeline stops, nitrogen is introduced from the vicinity behind the gas source valve to capture the residual gas, or all manholes are opened to capture the residual gas by natural ventilation or forced air supply.
4. When the coke oven gas or mixed gas pipeline stops, nitrogen can be introduced at the beginning of the pipeline, or blast furnace gas can be introduced first to drive away the residual gas, and then the residual blast furnace gas can be driven away.
5. Drainers drain water from far and near one by one to drive away the residual gas inside.
6. Conduct explosion tests at the end of the pipeline and at each dead angle. If there is no ignition, stop the nitrogen and open the manhole for ventilation. Oxygen content reaches 18%, and carbon monoxide content is qualified before entering the pipeline.
(9) The ambition should be:
1. Clean the sundries in the pipeline, check the tools, and close the manholes and handholes after checking.
2. All valves shall be intact and can be closed and opened as required.
3. Fill the drainer with water to ensure the required water seal height, and close the drain valve and the test head valve.
4. Stop hot work on pipelines and ancillary equipment, and there shall be no fire source and high-temperature substances above 200℃ around the gas transmission pipeline.
5. Open the discharge pipe at the end, introduce nitrogen from the beginning of the pipe to drive away the air, and sample and test near the discharge pipe at the end until the oxygen content is lower than 2%.
6. Open the valve to introduce gas, and stop introducing nitrogen at the same time. Use gas to capture nitrogen to do explosion test at the end radiation tube, and close the radiation tube after passing the test for three times in a row.
7. Open the valve of the instrument conduit and restore the instrument indication.
8. The gas pipeline after renovation and overhaul must undergo a leak test and comprehensive inspection and acceptance before it can be inhaled.
(ten) found that the gas leak, not blindly adventure homework and adventure rescue.
Three. Safety management content in reconstruction and expansion project
The reconstruction and expansion project mainly refers to the reconstruction, expansion and maintenance of coke oven, blast furnace and converter, which involves the cross operation of gas recovery system. In addition to the above requirements, you must also:
(a) in the case of reconstruction and expansion projects and normal production, metallurgical enterprises are the main responsible parties involved in safety production matters of both parties, and bear the responsibility for this. Matters related to the safety production management of this enterprise and construction enterprises should be included in the safety management system of this enterprise. For example, when a construction enterprise is building a converter, a metallurgical enterprise cannot leak gas to the job site.
(two) the construction plan should be formulated, and the work content, tasks and responsibilities of each unit should be clearly defined, and it shall not be changed without re-confirmation.
(three) the person in charge of the reconstruction and expansion project and the person in charge of the production system should be responsible for one-on-one contact to avoid anyone else conveying instructions.
(4) Under the condition that the contents of the construction work within the scope of the reconstruction and expansion project have not been completely finished and the personnel have not been completely evacuated, all the commissioning and debugging work involving the gas system shall be finished, and the connection with the production system shall not be organized.
(five) the gas facilities after the renovation and expansion project shall be checked and accepted, and can be put into operation only after they are proved to meet the safety requirements and establish and improve the safety rules and regulations; The gas pipeline after reconstruction and expansion must pass the leak test and comprehensive inspection and acceptance before it can be delivered for use. The acceptance of gas facilities must be attended by the safety department of gas users.
Four, gas facilities safety inspection content
(1) General provisions.
1. All kinds of main gas equipment, valves, radiation pipes and pipe supports shall be numbered, and the numbers shall be marked in obvious places.
2. Platforms and workshops are in danger of gas leakage. , you must set two entrances and exits in opposite directions.
3. All kinds of workplaces with gas should be hung with eye-catching warning signs respectively.
4 gas auxiliary facilities remain intact and effective.
5. For equipment corrosion, pipe wall thickness, bracket elevation, etc. , focus on inspection once a year, and record the inspection.
6. The concentration of carbon monoxide in dangerous gas areas (such as basements, pressure stations, ditches, hot stoves and various gas generating facilities) must be determined regularly, and carbon monoxide monitoring devices should be set up in key parts.
(2) Gas consumption point.
1. A sampling tube shall be provided in front of the burner valve.
2. The two furnaces should be equipped with independent radiant tubes respectively.
3. The burner valve head has obvious switch signs.
4. Before the burner valve, there is a drainage or exhaust head.
5. The valve is tight, flexible and leak-free.
6. The combustion-supporting air duct is equipped with explosion-proof membrane and low-voltage alarm device.
(3) pipeline.
1. The main gas pipelines in the plant area shall be marked with obvious gas flow direction and type.
Warning signs should be hung in all places where gas may leak.
3. There is no visible leakage in the pipeline body (including flanges, valves and accessories).
4. When the gas pipeline is laid on the same pillar or bracket as the water pipe, heating pipe, fuel pipe and nonflammable gas pipe, the vertical clear distance shall not be less than 250 mm..
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