Pressure swing adsorption nitrogen purification system device

A new type of pressure swing adsorption nitrogen production device adopts a new gas distribution technology to optimize the adsorption efficiency.

　Nitrogen is an inert protective gas, which is widely used in petroleum, chemical and other industries, grain preservation, fruit preservation and metallurgy. The pressure swing adsorption nitrogen production equipment uses the difference in the diffusion rate of oxygen and nitrogen in the air in the carbon molecular sieve pores to separate the oxygen and nitrogen in the air. The diffusion rate of oxygen molecules is faster than that of nitrogen molecules. Oxygen molecules diffuse into the pores of carbon molecular adsorbents before nitrogen molecules, and nitrogen molecules that fail to diffuse into the pores of carbon molecular adsorbents are output as product gas.

Process principle
 
The compressed and purified air flows through the adsorption tower filled with carbon molecular sieves. The compressed air flows through the adsorption tower from bottom to top, during which the oxygen molecules are adsorbed by carbon molecular sieves. The unadsorbed nitrogen flows out from the upper end of the adsorption tower and enters a buffer tank. After a period of time, the carbon molecules in the adsorption tower are saturated by the adsorbed oxygen and need to be regenerated. Regeneration is achieved by methods such as depressurization or vacuuming. Two adsorption towers are used to adsorb and regenerate alternately to ensure continuous nitrogen output.

Technical characteristics of pressure swing adsorption nitrogen production equipment
 
Through special loading techniques, the service life of carbon molecular sieves can reach more than 10 years.
 
The pressure boosting and depressurization process is realized by a new gas distributor and a special control valve, with a service life of up to 2 million times. After the gas distribution technology is adopted, the pressure swing adsorption efficiency and piping process are greatly optimized.
 
The nitrogen flow rate is indicated by the flow meter, and the purity is continuously monitored by the oxygen analyzer. When the purity does not meet customer requirements, it will be automatically vented to prevent unqualified gas from entering the customer 's production line.
 
4. The use of gas distributor, reduce the number of valves.
 
5, skid-mounted block assembly, no installation workload on site
 
6, equipment covers an area of small, short production cycle
 
7.Starting quickly, the product nitrogen can be provided 30 minutes after driving.
 
8 、 High degree of automation, automatic unmanned operation
 
9, less investment, compact structure, low operating costs, simple process, less maintenance.
 
10. The purity of the product is 95 ~ 99.9995 %.

Nitrogen purification system
 
After mixing the raw material nitrogen produced by PSA pressure swing adsorption system with a small amount of hydrogen, the residual oxygen in the crude nitrogen in the reactor reacts with hydrogen to produce steam with the help of a special catalyst. The chemical reaction formula is as follows : 2H2 + O2-2H2 + reaction heat

Process principle
 
The nitrogen purification system can automatically adjust the amount of gas entering the feed gas according to the actual oxygen content continuously measured by the oxygen analyzer. In order to minimize the excess hydrogen and improve the purity of nitrogen, the system is equipped with a high-precision, high-performance hydrogen control module. The mixed gas enters a catalytic reactor, and the hydrogen and oxygen in the reactor undergo an exothermic reaction, which is converted into water vapor. After condensation, the water is removed. Nitrogen is dried by adsorption dryer, and finally a clean and dry nitrogen product is obtained.

Technical characteristics of nitrogen purification system
 
The purity of the product gas is continuously monitored by an oxygen analyzer. When the purity of the product gas is lower than the customer 's requirements. The high purity nitrogen leaving the reactor is first cooled by a cooler to remove the cooling water.
 
2, nitrogen products are very clean and dry ( product gas dew point can reach-70 °C ).
 
The control system can automatically adjust the hydrogen flow rate and ensure that the hydrogen content in the product nitrogen is the least.
 
4. The whole system is fully automatic operation.

Application of PSA nitrogen production equipment
 
Metal heat treatment : bright quenching and annealing, carburizing, controllable atmosphere, powder metal sintering
 
Chemical industry : Covering, inert gas protection, pressure transmission, paint, edible oil mixing
 
Petroleum industry : Nitrogen drilling, well maintenance, refining, natural gas recovery
 
Fertilizer industry : nitrogen fertilizer raw materials, coal protection, washing gas, etc.
 
The electronics industry : large scale integrated circuits, color television picture tubes, television and recorder components and semiconductor processing
 
Food industry : food packaging, beer film, non-chemical disinfection, fruit and vegetable preservation
 
Pharmaceutical industry : Nitrogen-filled packaging, transportation and protection of pharmaceuticals, pharmaceutical materials and pneumatic transmission
 
Coal industry : coal fire prevention, gas replacement in the process of coal mining
 
Rubber industry : cross-linked cable production and rubber products production anti-aging protection
 
Glass Industry : Gas Protection in Float Glass Production
 
Protection of cultural relics : anti-corrosion treatment and toxic gases of unearthed cultural relics, paintings, bronzes, silk fabrics, etc.

Pressure swing adsorption nitrogen production device
model	Finished product gas Nitrogen			feed gas			overall dimension
	gas output（Nm3/h）	pressure（MPa）	dew point（℃）	Air consumption（Nm3/h）	pressure（MPa）	dew point（℃）	Air inlet diameter	Air outlet diameter	length × width（mm）
JR5-95	5	≤0.6	≤-45	14	0.6-0.8	≤-25	DN15	DN15	1100×500
JR5-99				15					1100×500
JR5-295				17.5					1100×500
JR5-39				22.5					1100×500
JR5-49				27.5					1100×500
JR10-95	10	≤0.6	≤-45	23	0.6-0.8	≤-25	DN25	DN15	1100×500
JR10-99				30					1400×800
JR10-295				30					1600×1000
JR10-39				42					1800×1200
JR10-49				60					1900×1300
JR20-95	20	≤0.6	≤-45	46	0.6-0.8	≤-25	DN25	DN25	1300×500
JR20-99				60					1600×800
JR20-295				60					1800×1000
JR20-39				84					2000×1200
JR20-49				120					2200×1400
JR30-95	30	≤0.6	≤-45	69	0.6-0.8	≤-25	DN25	DN25	1500×600
JR30-99				90					1800×900
JR30-295				96					2000×1100
JR30-39				126					2200×1400
JR30-49				189					2400×1500
JR40-95	40	≤0.6	≤-45	92	0.6-0.8	≤-25	DN25	DN25	1500×700
JR40-99				120					1800×1000
JR40-295				132					2000×1200
JR40-39				156					2200×1400
JR40-49				252					2400×1600
JR50-95	50	≤0.6	≤-45	115	0.6-0.8	≤-25	DN32	DN25	1700×700
JR50-99				144					2000×1000
JR50-295				165					2200×1200
JR50-39				198					2400×1400
JR50-49				318					2600×1600
JR80-95	80	≤0.6	≤-45	184	0.6-0.8	≤-25	DN40	DN25	2000×900
JR80-99				240					2300×900
JR80-295				252					2500×1400
JR80-39				316					2700×1600
JR80-49				504					2900×1800
JR100-95	100	≤0.6	≤-45	230	0.6-0.8	≤-25	DN50	DN25	2300×900
JR100-99				300					2600×1200
JR100-295				330					2800×1400
JR100-39				396					3000×1600
JR100-49				630					3200×1800
JR200-95	200	≤0.6	≤-45	460	0.6-0.8	≤-25	DN65	DN32	2900×1500
JR200-99				570					3200×1800
JR200-295				660					3400×2000
JR200-39				792					3600×2200
JR200-49				1266					3600×2200
JR300-95	300	≤0.6	≤-45	690	0.6-0.8	≤-25	DN80	DN40	3500×1700
JR300-99				864					3800×2000
JR300-295				942					4000×2400
JR300-39				1188					4200×2400
JR300-49				1896					3700×2400
JR500-95	500	≤0.6	≤-45	1150	0.6-0.8	≤-25	DN100	DN50	3900×1900
JR500-99				1422					4200×2200
JR500-295				1572					4400×2200
JR500-39				1974					5000×2800
JR500-49				3162					4800×2800
JR800-95	800	≤0.6	≤-45	1840	0.6-0.8	≤-25	DN125	DN65	4700×2100
JR800-99				2280					5000×2400
JR800-295				2520					5200×2600
JR800-39				3162					5200×2800
JR800-49				5064					5400×3000
JR1000-95	1000	≤0.6	≤-45	2301	0.6-0.8	≤-25	DN150	DN80	4900×2300
JR1000-99				2851					5200×2700
JR1000-295				3151					5400×2900
JR1000-39				4200					5400×3200
JR1000-49				6000					5600×3800

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