Answer: small air separation equipment consists of air compressor, purifier, air separation Tower, expansion machine, oxygen compressor and other main parts. Before starting, all parts of the equipment should be ensured to be in good condition and can be put into operation at any time.
(1) start-up preparation of piston air compressor
Air compressor after installation shall be to the manual test run. Daily drive preparing work before remember "water, oil, gas, electricity, Ann" five words, in accordance with these five aspects to check.
1) Water: open at all levels cylinder liner and cooler cooling water, oil cooler cooling water and imported valve, check cooling water whether unblocked and adjustment that suits;
2) oil: includes cylinder lubricating oil and lubricating oil of Operation part. For hand plunger oil pump until opening individual oiling point check valve oil outflow and to oiler in-fill cylinder oil. The working parts of the oil focus on fuel tank (or crankcase) you mian ji, its oil storage whether above 2/3, oil pump front refueling funnel whether fill it up. If for circulating oil pump of air compressor, should first start the pump, and check its oil pressure is normal every lubrication point whether unblocked;
3) gas: Open the blow-off valves of oil-water separators at all levels, open the blow-off valves of oil-water separators of purifiers, connect a group of valves of purifiers, and close the general inlet valve of high pressure air inlet and distillation column. If air compressor level intake valve with "top open device" should be top open, to air compressor light load starter;
4) electricity: Check whether the brush handle of the motor is in the "start" position. With low-voltage integrated starter device, its rotor "short handle" should be placed on "start" position; with resistance starter controller equipment should be hand wheel pointer "0" bit. Turn on the current and check whether the voltage is around 380 V;
5) Ann: security check do not forget the following points:
Each mechanical part of join and fastening screws loose;
Air compressor, motor based on foot screws are loose;
Pressure gauge, oil pressure gauge test of time whether expired, and open its valves;
Relief valve calibration period whether expired;
Whether the tightness of the belt is appropriate;
For human barring freewheel 2 ~ 3-to, check cylinder whether stuck;
Whether the surrounding roads are unobstructed, and whether it is convenient for emergency parking.
(2) kong fen ta startup ready
The distillation column must be thoroughly heated and blown off before starting, and the following inspection should be done:
1) Check fractionator perpendicularity and adjust;
2) check the safety valve, pressure gauge, thermometer, calibration cycle is over, mounted the location is correct. Level gauge, flow meter in the liquid whether "0" bit (bit Air Liquide liquid level shall be filled coloring water, liquid oxygen level gauge and oxygen, nitrogen flow meter shall be filled carbon tetrachloride, fraction flow meter shall be filled mercury );
3) ready oxygen, nitrogen analyzer;
4) Check the switch-on condition of the valve of the distillation column: the whole joint-1 Valve, the pass-6 valve, the delivery valve of the finished oxygen and nitrogen products, all the heating valves, the blow-1 and blow-2 valves. Full open high-pressure air inlet valve, oxygen, nitrogen discharge vent valve, fraction outlet valve and-7 (or pass-8 valve), pass-1 valve, all ya li biao fa, analysis, Valve, level Gauge Upper, Lower valve, liquid oxygen drain valve and upper, lower tower chui chu fa. Open section-4 valve and section-3 valve each 15 to, open section-2 valve and go 2 ~ 3 turns;
5) fractionating tower outer connection pipeline tightness of the check: In high-pressure air pressure normal start pressure when, should check high-pressure air imported flange and expander bridge connecting pipe each joint shall not have leak. Fractionator and expander guo qiao guan should be based on different situation seal check, and then dressed good insulation. This work with expander intake and, exhaust valve tightness test together.
(3) purifier before the start of Preparatory
1) the newly installed absorbents should be activated. Regeneration temperature is in accordance with the requirements of the specification;
2) kong fen ta start pre-should be recycled a group purifier set aside. Therefore, kong fen ta in before the start of heating in should be small do purifier regeneration of work. In the complete set air separation start front, should check valve switch the validity;
3) Check whether the pressure gauge and thermometer are in the verification period;
4) small jia wen lu whether the work normal, safety bo mo pian are periodic replacement;
5) connect the cooling water that uses a set of purifiers;
6) inspection from air compressor to fractionator all connection pipe line of the air tightness, and eliminate leak.
(4) piston Expander drive preparing work before
1) Check foot screws are solid tight, adjusting belt tension;
2) crankcase inner join N68 machine oil;
3) connect the thermometer, pressure gauge and oil pressure gauge and check whether they are correct;
4) Check motor rotation direction is correct;
5) Check the air tightness of the inlet and exhaust valves. Pair intake valve tightness of the check: by mechanical methods top open exhaust valve, the piston bottom dead center, intake valve are in the off, remove the exhaust ya li biao fa connector, if with expander exit bridge valve, the valve is closed. The high pressure air access. When the pressure up to 2MPa when inspection ya li biao fa joint leaks. Intake valve check., suspended high-pressure air access. Release the exhaust valve to close state by mechanical methods top open intake valve, the piston in bottom dead center. Slowly import high pressure air. When the pressure reaches 2MPa, check whether the valve joint of the pressure gauge leaks. Note: When high pressure air is introduced, the air inlet valve of the expansion machine is only open about 30 °, and there is a specially-assigned person guarding. What if coaster, shall promptly intake valve closed;
6) adjust the in, row valve rod and ejector pin of gap. First adjust the cam to the "0" position (namely the maximum air intake position), and put the piston to the bottom dead center. Release the intermediate ejector pin on the lock nut, adjusting screw to intake valve ejector pin and valve rod gap remain at 0.3 ~ 0.5mm between, and then lock nut solid tight. The piston place top dead center, use the same methods to adjust the exhaust valve gap;
7) check whether there are obstacles around the machine and whether tools are stored on the machine;
8) turn the flywheel for several turns, and check whether the opening of the inlet and exhaust valve and the operation of the motion mechanism are normal. Cam at the minimum intake location.
(5) turbine-Expander drive preparing work before
The inlet and outlet pipes of the expansion machine must be heated thoroughly and blown away clean; the air supply pressure of the bearing gas of the turbine expansion machine is 0.1 ~ 0.6MPa lower, check air flotation situation or feel air flotation good; bearing supply duct and sealing pipeline blow brush clean; on bearing gas, and control pressure at 0.55 ~ 0.6MPa; connect the tachometer; connect the cooling water of the ventilation fan; open the outlet valve of the expansion machine; close the expansion inlet valve; connect the sealing gas and adjust the pressure within 0.5 ~ 0.6MPa.
(6) oxygen compressor drive ready
When oxygen gas storage bag full of 2/3 oxygen can be drive ready. The procedure can refer to the start-up preparation work of the air compressor:
1) Water: connect the circulating water of the cooling tank of the cylinder and adjust the water volume. Small cooling water should be clean, there shall be no grease and corrosive substances;
2) oil: check crankcase in-oil of the oil height about in you mian ji around 1/2;
3) air: Open oxygen compressor imports of Valve, open gas-water separator on the chui chu fa, turn off the oxygen to oxygenation table valve and gateway to storage airbag in the valve;
4) Electric: check motor brush, start rheostat handwheel whether put in the "start" position on (note: equipped with frequency sensitive rheostat Motor no boot brush );
5) Ann: security inspection and air compressor same.
Notification oxygenation table do charger bottle of preparation work. Oxygen compressor cylinder lubrication and cooling for distilled water box to fill distilled water, and before driving half a minute left and right open dripping device, adjustment good traffic.
Above ready after work can start.
