(1) air pipeline explosion accident

1, cause of accident:

1) ? Air duct explosion caused by automatic stop or trip of blower;

2) ? The automatic stop or trip of the voltage stabilizer leads to the explosion of trachea;

3) ? Air pipeline explosion caused by power failure in the whole station;

A. improper handling of power failure in the whole station

B. Power failure and misoperation of the whole station

C. the power failure of the whole station was not handled.

4) ? When the whole station stopped gas, the bell valve did not open, which led to the explosion of the air main pipe;

5) ? Blower and supercharger stop without stopping coal feeder to cause explosion;

2, preventive measures:

1) ? Strengthen technical training to improve the accident judgment ability and accident handling level of employees;

2) ? When the blower, supercharger or "double stop", keep positive pressure operation;

3) ? When the whole station loses power or gas, it must be operated in strict accordance with the operating procedures;

4) ? The whole station should be under unified command, cooperate with each other and have a clear division of labor when handling accidents;

5) ? Strengthen labor discipline and work strictly;

(2) An explosion accident occurred at the bottom of the furnace.

1, cause of accident:

1) ? Closing the flap causes the automatic gas stove to explode;

2) ? When sending gas, the bottom of the furnace explodes due to the excessive pressure of the two furnaces;

3) ? The hole in the bottom of the furnace is not tightly sealed, which leads to the explosion of the furnace;

4) ? During gas transmission, the bell valve falls off prematurely and the bottom of the furnace explodes;

5) ? Interlocking failure, blower or supercharger tripping, resulting in furnace bottom explosion;

2, preventive measures:

1) ? When automatic adjustment is adopted, the flow rate should not be too small to prevent gas from flowing back;

2) ? When stopping gas supply, unified command, close cooperation and clear division of labor are required;

3) ? Regularly check whether each inlet hole and water seal are correct;

4) ? Regularly check whether each interlock is correct;

(III) Furnace explosion accident

1, cause of accident:

1) ? The bell valve is blocked, and the combustion bell valve causes the furnace body to explode;

2) ? Interlocking failure, blower or supercharger tripping, resulting in furnace explosion;

3) ? Overhauling the coal feeder in operation causes the furnace body to explode;

4) ? Water jacket explosion of furnace body caused by water shortage of steam drum;

5) ? Overpressure of steam drum leads to explosion of water jacket;

6) ? The water jacket enters the air duct too quickly, causing the furnace body to explode;

7) ? When the gas is stopped, the water seal reflux valve is not strict, causing the furnace body to explode;

8) ? Overhaul of hot standby furnace causes explosion of furnace body;

9) ? Critical explosion of the furnace caused by the start-up operation failure of the hot standby furnace;

2, preventive measures:

1) ? When dealing with the blockage of bell jar valve, steam blowing or other tools should be used to poke and dig, and fire is not allowed;

2) ? Protective measures should be taken when the equipment is overhauled in operation, and a hot work ticket should be handled when hot;

3) ? When the steam drum is short of water, the airbag should be called "water" first;

4) ? Regularly check whether the pressure gauge of airbag safety valve is normal;

5) ? When filling the air bag with water, it is advisable to slowly fill it to the water level gauge 1/2-2/3;

6) ? Improve the sense of responsibility of employees and regularly check whether all water seals are normal;

7) ? Strengthen technical training, improve the technical operation level of employees, and issue safety operation certificates after passing the examination before they can operate independently;

8) ? Strict implementation of operating procedures, unified command, clear division of labor, close cooperation;

9) ? Regularly check whether the interlocking of auxiliary equipment is normal;

(4) Electric coke catching operation accident

1, cause of accident:

1) ? Electric coke catching explosion caused by hot work during maintenance;

2) ? Incomplete or incomplete purging, resulting in electric coke catching explosion due to hot work maintenance;

3) ? When the gas is transported, it is not purged or not completely purged, and the electric coke catching and power transmission causes an explosion;

4) ? Sending unqualified gas causes electric coke catching explosion;

5) ? Due to interlock failure, the blower tripped, resulting in electric coke catching explosion;

2. Preventive measures,

1) ? When hot work is carried out in the gas pipeline, purging should be carried out first, and a hot work ticket should be handled;

2) ? Before gas supply, the electric coke catcher should be fully purged;

3) ? When sending gas, the gas shall be tested to be qualified, and the oxygen content shall not exceed 0.8%;

4) ? Regularly check the linkage test of blower and supercharger;

(5) press explosion accident

1, cause of accident:

1). Hot work for voltage stabilizer maintenance, improper measures, resulting in explosion;

2) The voltage regulator was overhauled without purging and debugging, causing an explosion;

2, preventive measures:

1). The hot work of voltage stabilizer maintenance should be completely removed, and a hot work ticket should be handled;

2) The regulator can be debugged after maintenance and purging;

(6) Coal storage hopper explosion accident

1, cause of accident:

1). Overhaul the explosion caused by the fire of the fireman;

2). The coal feeder is stuck, which causes explosion due to improper handling;

2, preventive measures:

1). Safety and fire prevention measures should be taken during hot work maintenance;

2). When dealing with the fireman's card, it should be closely coordinated from top to bottom, and the coal valve should be slowly opened;

Second, the fire accident case analysis

(1) Coal storage hopper fire accident

1, cause of accident:

1). Sparks fall into the coal hopper when overhauling the coal bunker;

2). Introduction of other fire sources (such as pipes and combustibles);

3) Bring into the fire source when overhauling the coal conveying belt;

2, preventive measures:

1). During hot work or other operations, safety measures should be taken to prevent sparks from falling into the coal hopper;

2). Smoking is prohibited in the coal conveying belt;

3). Improve personnel quality and enhance fire prevention awareness;

(2) Fire accident in outdoor purification area

1, cause of accident:

1) The radiation tube at the generator outlet was struck by lightning and caught fire;

2) The cyclone caught fire when it was hot;

3). The electric coke catching transmission is not purged, causing a fire;

4). The tar pool is on fire, causing a fire;

5). Overhaul the purification equipment and cause a fire;

6). The cable trench caught fire, causing fire;

7). The introduction of other external fire sources leads to fire;

2, preventive measures:

1). Lightning rods should be inspected regularly;

2). Fire prevention and safety should be well done when the equipment is hot, and a hot working ticket should be handled;

3). All fire control facilities and equipment should be complete (fire hydrants, fire extinguishers, etc.). );

4. Conduct regular fire safety inspections to completely eliminate fire hazards;

5). The oxygen content in the gas should be tested before electric coke catching and power transmission;

6). Smoking is prohibited in the gas station, and safety measures should be taken when using naked flame equipment;

Third, case analysis of poisoning accident

(1) poisoning accident in main workshop

1, cause of accident:

1). The gas pipeline leaked and was not found in time;

2). Misoperation leads to gas pipeline rupture;

3). The bell jar valve water seal is damaged;

4). Failing to repair the furnace according to the operation procedures;

2, preventive measures:

1). Strengthen training, improve the technical level of employees and strictly observe their posts;

2) Check whether the water seal is normal in time;

3) Wear protective equipment and operate according to regulations;

(2) poisoning in coal conveying corridor and coal storage hopper area

1, cause of accident:

1). Poisoning occurs when a single person enters the coal storage hopper for work;

2). Accidentally fall into the coal storage hopper for poisoning;

3). Taking a rest near the coal conveying passage or factory building leads to poisoning;

2, preventive measures:

1). When entering the coal storage hopper, there should be someone to monitor it;

2) When the gas enters the coal storage hopper, it should be thoroughly purged;

3). It is forbidden to rest in or near the airway;

(3) Poisoning between voltage regulators

1, cause of accident:

1). The sealing ring of the voltage regulator leaks;

2). The instrument pipe joint of the voltage regulator falls off.

3) gas leakage when tar is discharged from the bottom of the pressurizer;

4) Gas leakage caused by maintenance of the inlet and outlet doors of the voltage stabilizer;

2, preventive measures:

1). It is forbidden to rest between pressurizers;

2). Check regularly. Ensure that the equipment is normal;

3) Install indoor alarm facilities and emergency ventilation devices;

4). Safety protection measures should be taken when overhauling the voltage regulator;

(5) Poisoning accident of purification equipment

1、 ? Cause of the accident:

1) ? Overhaul cyclone dust collector and electrostatic precipitator intercooler, poisoning due to incomplete or incomplete purging;

2) ? Poisoning caused by improper safety measures when studying purification equipment;

3) ? Rest near the purification equipment, gas leakage causes poisoning;

4) ? The emission of purification equipment is too low, resulting in poisoning;

2、 ? Preventive measures;

1) ? Before entering the purification equipment, designated personnel shall conduct purging and supervision;

2) ? Maintenance of purification equipment, must apply for a working ticket, and take safety measures;

3) ? All personnel are forbidden to rest near the equipment;

4) ? Wear protective equipment at work to prevent poisoning;

5) ? Strengthen safety education and improve employees' safety awareness;

Fourth, the cause of the equipment accident

(1) Water jacket burning accident

1、 ? Cause of the accident;

1) ? Long-term use of tap water leads to water jacket scaling;

2) ? Demineralized water was interrupted and not found in time;

3) ? The water level is false due to the failure of water level gauge;

2, preventive measures:

1) ? Tap water has been used for a long time, so it should be discharged regularly;

2) ? Ensure sufficient softened water;

3) ? Check carefully and find problems in time;

(2) The fire layer falls and burns the grate, bottom and skirt.

1, cause of accident:

1) ? Poor control of furnace worker's level leads to the decline of fire layer;

2) ? The equipment is defective and the ashtray leaks;

3) ? There was no water in the ashtray and it was not found in time;

4) ? Excessive ash removal;

2, preventive measures:

1) ? The fireman should control the liquid level in the furnace well, and there should be no gray phenomenon;

2) ? Ensure that there is enough sealing water in the ashtray;

3) ? According to the material level in the furnace, the ash should be removed properly;

(three) blower, compressor bearing damage accident

1, cause of accident:

1) ? After the overhaul of the fan, the center is misaligned, resulting in bearing damage;

2) ? Vibration of fan bearing causes bearing damage;

3) ? Bearing is damaged due to lack of oil;

2、 ? Preventive measures:

1) ? Check whether the center is correct after overhaul of the fan;

2) ? Oil the bearings regularly;

3) ? Check the equipment regularly and switch in time when problems are found.

(4) Accident of plant pipe network equipment

1, cause of accident:

1) ? The natural rupture of gas transmission pipeline caused the whole plant to stop gas;

2) ? Welding seam cracking caused by falling gas pipeline;

3) ? The operation of the dumper causes the gas pipeline to rupture;

2, preventive measures:

1) ? Regularly check whether the pipeline is blasted;

2) ? The support of gas pipeline should be firm;