Year1
- 小型：
- 高纯度工业制氧机
- 工业：
- 高纯度工业制氧机
- 高纯度：
- 高纯度工业制氧机
A series of pressure swing adsorption oxygen production equipment and cryogenic oxygen production equipment provided by Xinbang.
Our company can choose models of oxygen-generating equipment with an oxygen purity of ≥ 0.0 Å / cryogenic oxygen-generating equipment with an oxygen purity of ≥ 100 Å.
1. Technical indicators of oxygen production equipment
Oxygen purity
Oxygen pressure
Effective air consumption
Air compressor
Power consumption
2. Oxygen production Equipment Working Principle
The pressure swing adsorption oxygen generator is an automated equipment that uses zeolite molecular sieve as the adsorbent and uses the principle of pressure adsorption, pressure reduction and desorption to adsorb and release oxygen from the air to separate oxygen. Zeolite molecular sieve is a white spherical granular adsorbent with micropores on the surface and inside processed by a special pore treatment process. Its pore characteristics enable it to achieve excellent kinetic separations. The separation effect of zeolite molecular sieve pairs is based on the small difference in the kinetic diameter of the two gases. The molecules have a faster diffusion rate in the micropores of the zeolite molecular sieve and the molecules have a slower diffusion rate. The diffusion of water and nitrogen in compressed air is not much different from that of nitrogen. What is finally enriched from the adsorption tower is oxygen molecules.
Pressure swing adsorption oxygen production utilizes the selective adsorption characteristics of zeolite molecular sieves and uses a cycle of pressure adsorption, decompression and desorption to alternately enter the adsorption tower with compressed air to achieve air separation and continuously produce high-purity product oxygen.
The oxygen generator uses high-quality zeolite molecular sieve as the adsorbent to produce oxygen from the air under a certain pressure based on the principle of pressure swing adsorption. The purified and dried compressed air is adsorbed under pressure and desorbed under reduced pressure in the adsorber. Due to the aerodynamic effect, the diffusion rate of nitrogen in the pores of the zeolite molecular sieve is much greater than that of oxygen. Nitrogen is preferentially adsorbed by the zeolite molecular sieve and oxygen is enriched in the gas phase to form the finished oxygen. Then the adsorbent depressurizes to normal pressure to desorb the adsorbed nitrogen and other impurities to achieve regeneration. Generally, two adsorption towers are set up in the system. One tower adsorbs and produces oxygen, and the other tower desorbs and regenerates. The program controller controls the opening and closing of the pneumatic valve so that the two towers cycle alternately to achieve the purpose of continuously producing high-quality oxygen. The entire system consists of the following components: compressed air purification component, air storage tank, oxygen and nitrogen separation device, oxygen buffer tank, if a cylinder needs to be filled, an oxygen booster and bottle filling device are installed at the end.
Compressed air purification group
The compressed air provided by the air compressor is first passed into the compressed air purification assembly. The compressed air is first removed by the pipeline filter to remove most of the oil, water and dust, and then is further removed and filtered by the freeze dryer. The filter removes oil and dust and is deeply purified by the ultra-fine filter that follows. According to the system working conditions, UEG Gas has specially designed a set of compressed air oil remover to prevent possible trace oil penetration and provide sufficient protection for the molecular sieve. Rigorously designed air purification components ensure the service life of the molecular sieve. The clean air processed by this component can be used as instrument air.
Air storage tank
Oxygen and nitrogen separation device
There are two adsorption towers equipped with special molecular sieves. When the clean compressed air enters the inlet end of the tower and flows to the outlet end through the molecular sieve, the product oxygen adsorbed by it flows out from the outlet end of the adsorption tower. After a period of time, the molecular sieve adsorption in the tower becomes saturated. At this time, the tower automatically stops adsorbing the compressed air and flows into the tower to absorb nitrogen and produce oxygen to regenerate the molecular sieve of the combined tower. The regeneration of molecular sieves is achieved by rapidly lowering the adsorption tower to normal pressure to remove the adsorbed ones. The two towers alternately perform adsorption and regeneration to complete the separation of oxygen and nitrogen and continuously output oxygen. The above processes are controlled by programmable controller. When the oxygen purity at the outlet end reaches the set value, the program will automatically open the vent valve to automatically vent unqualified oxygen to ensure that unqualified oxygen does not flow to the gas point. When the gas is vented, use a silencer to reduce the noise.
Oxygen Buffer Tank
The oxygen buffer tank is used to balance the pressure and purity of oxygen separated from the nitrogen and oxygen separation system to ensure a stable continuous supply of oxygen. At the same time, after the adsorption tower switches work, it will recharge part of its own gas into the adsorption tower. On the one hand, it helps the adsorption tower to increase the pressure, and on the other hand, it also plays a role in protecting the bed, and plays a very important process assisting role during the operation of the equipment.
Oxygen filling system
Oxygen filling includes an oxygen balloon, an oxygen booster, and an oxygen filling row to fill the finished oxygen into cylinders.
Three technical indicators of low-temperature air separation oxygen production equipment
Four working principles of low-temperature air separation oxygen production equipment
Using low-temperature distillation process to separate air, oxygen, nitrogen and argon can be produced.
Air compression cooling and purification
The heat generated by the compression of the raw air by the multi-stage centrifugal turbine compressor is taken away by the intercooler and aftercooler, and then is nitrogen-contaminated and frozen in the air cooling tower The water is further cooled to the desired temperature. A demister is used to remove moisture from the air and a water separator is also installed.
The pre-cooled air passes through the double-bed adsorber to remove moisture, carbon dioxide and hydrocarbons from the air with activated aluminum and molecular sieves filled in the adsorber. The air passes through the bed and then enters the dust filter to remove molecular sieve powder that may be contained in the air. A small stream of air is extracted after the dust filter as instrument air for the air separation plant.
One of the two adsorbers is regenerated by the waste nitrogen from the cold box. The regeneration gas is heated by an electric heater in the regeneration heating cycle.
After the air leaves the purification system, the clean air is divided into two streams. One stream enters the main heat exchanger in the cold box and the other stream is compressed to high pressure by a multi-stage centrifugal air booster and then sent to the cold box. The medium-pressure air and high-pressure air are cooled to produce product oxygen, product nitrogen and waste nitrogen by exchanging heat with the reflux liquid oxygen through the main heat exchanger in the cold box.
Air Distillation
Air distillation is carried out in the cold box of the air separation equipment. The cold box is equipped with a main heat exchanger, a nitrogen heater, a lower tower and an upper tower, a main condenser, an argon condenser, an argon tower, a turbine expander, a cryogenic pump, etc.
The medium-pressure air close to the dew point enters the lower tower for primary separation.
A part of the high-pressure air is extracted from a certain position of the main heat exchanger and sent to the turbine expander for expansion to obtain the required cooling capacity. The expanded air is fed into the medium pressure tower. Another part of the high-pressure air is further compressed in the booster coupled with the expander to increase the pressure. In the main heat exchanger, the liquid oxygen is evaporated and expanded through the expansion valve before being sent to the medium-pressure tower. Oxygen and nitrogen are separated from the air through low-temperature distillation in the cold box. In order to produce argon gas, the argon fraction in the middle of the upper tower is sent to the refined argon tower to remove the nitrogen component. Send the pure liquid argon obtained at the bottom of the tower into the storage tank.
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