I. Overview
1. Purpose: To guide operators on how to properly use liquid oxygen and liquid nitrogen
2, the use of equipment: cryogenic liquid storage tank, gasifier, voltage regulator
Second, the operation steps
1. Preparation before gas supply
1.1 Check if the pressure in the tank is normal.
1.2 Slowly open the liquid outlet valve and open the front valve of the pressure reducing valve when the pressure in the tank reaches the required pressure.
2, gas supply program
2.1 After the pressure is stable, open the liquid outlet valve.
2.2 Open the air supply valve after the evaporator and the gas station starts working.
3, close the program
3.1 Close the outlet valve, booster valve.
3.2 Close the pre-reduction valve to deactivate the gas station.
4, the fault handler
4.1 If the pressure is too high, open the vent valve to reduce pressure.
4.2 The pressure is too low, open the booster valve (and boost switch) for boosting.
4.3 When the safety valve jumps due to excessive pressure, open the vent valve to reduce the pressure in the tank.
Then close the safety valve and pay close attention to the pressure changes in the tank.
4.4 When the leak is found, take the necessary measures and notify the Factory Facilities Section.
Third, the operating parameters
1. The oxygen and nitrogen transport pressure shall not be lower than 0.45Mpa and shall not exceed 0.6 Mpa.
2. Under normal circumstances, the front and rear valves of the outlet valve and the pressure regulating valve are normally open, and the vent valve is normally closed.
3. When the liquid volume is less than 25% of the reserve, the shifting department should notify the supplier in time, and report the power supervisor in time when the contact is difficult, and contact the gas supply.
Fourth, maintenance
1. The patrol personnel shall not arbitrarily dial the valve, decompression device, and notify the Factory Facilities Section if problems are found.
2. Repair work shall be carried out by professional maintenance personnel of BOC Gas Company.
V. Inspection inspection (submission, 5S work)
1. The patrol personnel must make meter readings every hour for liquid oxygen and liquid nitrogen storage tanks, and make a record.
2. It must be monitored on site when adding liquid. The pressure of adding liquid can not affect production.
3. Do a good job in counting the amount of liquid added and record it.
4. After liquid oxygen and liquid nitrogen storage tanks are filled, the pressure changes in the storage tank should be closely monitored within 24 hours. If the pressure fluctuation is large, it should be discharged immediately to maintain normal pressure.
5. Pay close attention to the storage capacity of the liquid tank. If the specified lower limit is reached, the gas should be contacted in time.
6. When the evaporator is seriously frosted, the defrosting work should be done in time.
Sixth, security measures
1. When the operator opens and closes the valve pipe fittings, he must wear antifreeze tools.
2. For the thawing of equipment, pipelines and valves, only water can be used, and it is strictly forbidden to beat, fire and electric heating.
3. Oil and oxygen storage tanks are strictly prohibited from oil. It is strictly forbidden to contact equipment with acid, alkali and oil.
4. The liquid nitrogen storage tank leaks and the staff are suffocating. (When emptying, stay as far as possible)
5. Non-workers are not allowed to enter the liquid oxygen and liquid nitrogen areas.
Seven, environmental protection
1. Prevent leakage and save energy.
( Shao Lihua )
Doosan Main Wiring Harness,Doosan Main Pump Assy,Doosan Excavator Main Pump,Doosan Loader Parts
JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.sdkomatsudozerparts.com