The carbon molecular sieve CMS

Commodity description：
The Carbon Molecular Siening Series (HTCMS) product produced by the company is a new non-polar adsorbent that adsorbes oxygen molecules in the air at normal temperature and pressure change conditions, and thus obtains nitrogen-rich gas.

The product belongs to carbon adsorbent, which is a porous material composed of carbon, and the pore structure model is disordered accumulation of carbon structure. Carbon molecular sieve is a non-stoichiometric compound, and its important properties are based on its micropore structure. Its ability to separate air depends on the different diffusion rates of various gases in the air in the pores of carbon molecular sieves, or different adsorption forces, or the simultaneous action of the two effects. Under equilibrium conditions, the adsorption capacity of carbon molecular sieves for nitrogen and oxygen is quite close, but the diffusion rate of oxygen molecules through the narrow pores of carbon molecular sieves is much faster than that of nitrogen molecules. Carbon molecular sieve air separation of nitrogen is based on this performance, away from the equilibrium conditions of time Enriching nitrogen molecules in the gas phase.

The device is generally called a nitrogen making machine. Its technological process is to use pressure swing attachment (PSA) at room temperature as a non-heat source adsorption separation process. carbon molecular sieves at room temperature pressure swing adsorption component adsorption capacity because of its component) The increase in pressure is reduced by the decrease in its partial pressure. Thus, the carbon molecular sieve is adsorbed under pressure, liberated during decompression, and the adsorbed component is released to regenerate the carbon molecular sieve.

Conditions for carbon molecular sieves to be controlled:

1.Pretreatment of raw material air

Clean raw material air into the carbon molecular sieve adsorption tower is very necessary. Because the oil vapor enters the micropores that block the carbon molecular sieve, the separation effect is greatly reduced. After the raw material air is compressed by the air compressor, not only the air temperature is increased, but also the oil vapor is present, so it needs to go through the cooler and the oil output, drying and cooling purification system. Finally, the treated raw material air enters the carbon molecular adsorption tower.

2.Product nitrogen concentration and gas production

Preparation of nitrogen by carbon molecular sieve, its N2 concentration and Gas production can be adjusted according to the needs of users, gas production will decrease, N2 concentration will increase, on the contrary, N2 will decline. According to the actual needs of users, the two can be considered comprehensively in order to obtain low-cost nitrogen .

3.Pressure equalizing time

In the process of nitrogen production by carbon molecular sieve, when the adsorption of an adsorption tower is over, the gas in the adsorption tower needs to be removed from the top ,Make the gas pressure of the two towers the same, this process is called the equalizing pressure of the adsorption tower. The energy can be recovered and the impact of carbon molecular sieve in the adsorption tower can be reduced by selecting the appropriate equalizing time ,Extend the service life of molecular sieves. Generally choose the average pressure time of one to three seconds . 

4.Gas production time

Due to the different adsorption rates of oxygen and nitrogen, the adsorption of 02 on carbon molecular sieves reaches equilibrium in a short time. at this time, the adsorption capacity of N2 is very small. the adsorption time is longer properly, which can save raw material air, reduce energy consumption and reduce valve switching frequency on nitrogen-making machine. Improve the stability of the device, extend the service life of carbon molecular sieves, general selection The adsorption time is forty-five to ninety seconds

5.Operating pressure

The adsorption pressure is high and the adsorption capacity is also large, so pressurized adsorption is beneficial, but the adsorption pressure is too high, and the air energy consumption and device requirements are also high. Therefore, it is necessary to select the adsorption pressure from the perspective of comprehensive energy consumption. It is suggested that 0.6-0.8MPa is suitable for the adsorption pressure selection of general atmospheric regeneration process .

6.Service temperature

Because the adsorption process has exothermic effect, the adsorption temperature increases and the adsorption capacity decreases. Therefore, the selection of lower adsorption temperature is conducive to the performance of nitrogen production. The process of nitrogen making machine is advantageous to reduce the adsorption temperature under the condition of condition.

Materialization indicators：

1.Particle diameter：1.1-1.3mm

2.Adption time：2*60s

3.Specific gravity：650-690g/1

4.Compressive strength：≥100N/ pcs

5.List：