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Nitrogen Unit

Nitrogen pumping unit AP-II

THIS NITROGEN PUMPING UNIT  IS MOUNTED ON A TRAILER AND CONSISTS OF THREE MAIN COMPONENTS; STORAGE TANK, PUMPING SYSTEM AND HEATER (VAPORIZER).

Liquid nitrogen is stored in a special pressure vessel at -1950 C. (-3200 F.). The vessel is actually no more than a large twin shelled "thermos bottle. The inner tank is a stainless steel pressure vessel which holds the liquid nitrogen. While the outer steel shell provides the insulating space on which a near vacuum is drawn. Approximately 8" of special "perlite" insulation and polished inner surfaces further help reduce radiant heat transfer.

Liquid nitrogen in storage does loose a small percentage of product continuously to vaporization, but can be stored for an extended number of weeks with minimal product loss. Liquid nitrogen from the tank flows to a "boost pump" through stainless steel pipes. This boost pump is a hydraulic centrifugal pump with cryogenic liquid handling capabilities. The boost pump raises the pressure of the liquid nitrogen up to 827 kPa (120 PSI). The nitrogen at 827 kPa (120 PSI) is then fed to a high pressure cryogenic pump. This pump is a positive displacement "Triplex" pump that can deliver pressures up to 10,000 PSI (70 mpa). The "Triplex" pump raises the pressure of the liquid nitrogen up to required working pressures. From the high pressure pump the liquid nitrogen is forced through a series of stainless steel coils which are heated by hot air from a diesel burner. The liquid nitrogen in these coils absorbs heat and is gasified.

This gaseous nitrogen at 100 - 650 C. (500 – 1500 F.) is the final product which flows down the line for its various service applications

NITROGEN PUMPING UNIT

 
Manufacturer CANADIAN FRACMASTER LTD.
Model Trailer mounted nitrogen unit 055

Serial number

 

CFM 01988001

Year of production    

1988.

Weight with liquid nitrogen

23 810 Kg

Weight without liquid nitrogen

15 350 Kg

 

TRAILER  

Manufacturer    

FRUEHAUF

Serial number

2H8V03629KT000101

Number of axles

two
Number of tires eight + one

Dimension of tires

11 X R22.5

Pressure in tires

700 Kpa

 

NITROGEN PUMING UNIT CAPACITY  

Volume of gaseous nitrogen for cold end ID 2"  

15 300 Sm 3 /h  on 686 bar

Volume of gaseous nitrogen for cold end ID 2.5"  

9 300 Sm 3 /h  on 535 bar

 

CRYOGENIC STORAGE TANK  
Manufacturer

LOX EQUIPMENT COMPANY

 

Serial number

 
30197
Tank volume

11.35 m 3 (3000 gal.)

Maximum work volume of liquid nitrogen 10.2 m 3
Weight of liquid nitrogen 8230 Kg
Gaseous nitrogen volume 7000 Nm 3
Pressure in tank during storage and transport 105 Kpa (15 psi)
Working pressure 275 Kpa (40 psi)
Test pressure 440 Kpa (64 psi)
Vacuum between walls of tank 1 – 10 Pa
Nitrogen storage lost 40 – 80 kg/day

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BOOST PUMP  
Manufacturer AIRCO CRYOGENICS 
Type 1 1/2"  x 2 1/2" x 6"
Serial number 88659931
Maximum pressure 827 Kpa (120 psi)
Maximum flow rate 378 l/min (100 GPM)
Maximum power 5.5 Kw (7.5 Ks)
Hydraulic drive motor VOLVO F11-5
Hydraulic pressure 13 790 Kpa (2000 psi)

HIGH PRESSURE "TRIPLEX" PUMP  
Manufacturer AIRCO CRYOGENICS 
Type 3-LMPD with gear box
Serial number 821434719
Gear box ratio 1:2.615
Maximum RPM 900 rev./min
Maximum power 350 Kw (476 Ks)
Pistons stroke 50.8 mm (2")
Piston OD 50.8 mm (2") and 63.5 mm (2.5")
Maximum LN 2 flow rate 236 l/min and 370 l/min
Maximum WP 686 bar (10 000 psi)
Lube pressure 410 – 550 Kpa ( 60-80 psi)
Oil volume 180 l

VAPORIZER BURNERS   
Fan Centrifugal with hydraulic motor
Hydraulic pressure 13 790 Kpa ( 2000 psi)
Maximum RPM 2700 rev./min
Combustion chamber Single chamber with turbulent blend
Maximum fuel pressure 3445 Kpa (500 psi)
Fuel consumption @ 3 flames 284 l/h ( 75 gal/h)
Fuel Diesel
Vaporizer section With stainless steel coiled tubes manifold
Serial number 81133641
Maximum pressure 137 Mpa

ENGINE  
Manufacturer DIESEL ALISON
Type GM 12V-71
Serial number 12VA083037
Power 360 Kw (480 Ks) on 2100 rev./min
Maximum fuel consumption 100 l/min
Oil pressure 105 – 5480 Kpa (15 – 80 psi)
Oil volume 59 l (15.5 gal.)
Cold fluid volume 113 l (30 gal.)
Fuel reservoir 1135 l (300 gal)

TRANSMISSION  
Manufacturer DIESEL ALISON
Type CLT 755
Serial number 2510123557
Maximum power 317 Kw (425 Ks) on 2100 rev./min
Oil pressure 890 – 1710 Kpa (130-250 psi)
Oil volume 76.5 l (18 gal.)

HYDRAULIC SYSTEM  
Oil pump Three section
Manufacturer COMMERCIAL SHEARING
Type P50B27860Y615-11BV1C12-1CP30A291SPAB05-22
Oil volume 378 l (100 gal.)