Small air separation plantIt consists of air compressor, purifier, air separation tower,Expander,Oxygen compressorAnd 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) piston typeAir compressorStart-up preparation
Air compressor after installation shall be to the manual test run. The daily preparation work before driving should remember the words "water, oil, gas, electricity and safety", and check according to these five aspects.
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: including cylinder oil and to part of the oil two parts. Shake the plunger oil pump by hand until the oil flows out of the check valve of each oil injection point is opened, and fill up the oil cylinder into the oil injector. The lubricating oil of the running part mainly checks the oil level gauge of the oil tank (or the crank case) to see if the oil storage volume is above 2/3, and if the refueling funnel in front of the oil pump is full. 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) air: open at all levels-water separator chui chu fa, open purifier of oil-water separator chui chu fa, Connect Group purifier valve, close the high pressure air intake and fractionator total imports valve. If the first-class air intake valve of the air compressor is equipped with "jacking device", it should be opened to enable the air compressor to start with light load;
4) electricity: Check whether the brush handle of the motor is in the "start" position. For the equipment with low-voltage integrated starter, its rotor "short-circuit handle" should be placed in the "start" position; for the equipment with resistance starting controller, the hand wheel pointer should be placed in the "0" position. On current, check voltage whether 380V left and right;
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;
Use manpower to rotate flywheel 2 ~ 3-to, check cylinder whether stuck;
Around if the road was clear, whether for emergency parking processing.
(2) The start-up preparation of the air separation Tower
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 fractionator of valve: total joint-1 valve, pass-6 valve, oxygen, nitrogen finished product submit valve, all heating valve, blow-1, blow-2 valve. 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) new into adsorbent to activation. Regeneration temperature by manual requirements;
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) turn using a set purifier of cooling water;
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) connected thermometer, pressure gauge, oil pressure gauge and inspection is correct;
4) Check whether the rotation direction of the motor is correct;
5) Check intake and, the exhaust valve tightness. 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 pressures 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 into the high-pressure air. When pressures to 2MPa when inspection ya li biao fa joint leaks. Note: access high-pressure air expander intake valve only 30 ° left and right, and with special care. 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 ~ 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 machine around obstructions, machine on storing tools, etc;
8) turn the handwheel number of to, check intake and exhaust valve open and sports mechanism operation of the normal. Cam at the minimum intake location.
(5) turbine-Expander drive preparing work before
Expander import and export tube must be thoroughly heating blowing clean; in turbine expander bearing gas supply pressure 0.1 ~ 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 ~ 6MPa; on tachometer; extensions fan cooling water; open expander exit valve; close expansion imported valve; on seal gas, and adjust pressure at 0.5 ~ 6MPa MPA.
(6) The start-up preparation of the oxygen compressor
When oxygen gas storage bag full of 2/3 oxygen can be drive ready. Its procedures can reference Air Compressor Drive Preparation:
1) Water: switch on the cylinder cooling water tank of the circulating water, and adjusting water. Pay attention that the cooling water should be clean without grease or corrosive substances;
2) oil: check crankcase in-oil of the oil height about in you mian ji around 1/2;
3) gas: Open the inlet valve of the oxygen compressor, open the blow-off valve on the gas-water separator, and close the valve that the oxygen is sent to the oxygen filling table and the pressure reducing valve that leads to the air storage bag;
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.
Inform the oxygen filling station to prepare for bottle filling. The distilled water tank used for lubrication and cooling in the cylinder of the oxygen compressor should be filled with distilled water, and the water dripping device should be opened about half a minute before starting to adjust the flow rate.
The above preparation work can be started after completion.
