Molecular sieve Introduction

Molecular sieve is a cubic lattice aluminosilicate compound having. Molecular sieve has a uniform porous structure, the diameter of its pores of uniform size, these cavities can adsorb molecules smaller diameter than the bore to the interior, and the polarity molecular sieves 3a of the molecules and the preferential adsorption of the unsaturated molecules having a capacity, which can very different degree, a different degree of saturation, and the boiling point of different molecular size to separate different molecules, which has the effect of "screening" of molecules, so called synthetic zeolite powder molecular sieves. Since the molecular sieves have a high adsorption capacity, high thermal stability, etc. The other adsorbents that are not so widely used to obtain the molecular sieve.

Dynamic dry

Definition: the weight of the adsorbent filled in a column adsorption, so that a certain concentration of the solution at a constant regeneration of molecular sieves temperature at a constant rate flow, so as measured by the adsorption capacity and adsorption capacity balance. (Liquid or gas to be treated by the downward flow of adsorbent from the adsorption is called dynamic.) Application: 1, air drying: warehouse, cargo hold, pharmaceutical, precision machinery, electronic Activated zeolite powders equipment factory, compressed air, instrument air dry. 2, the purification of industrial gas dehydration of: hydrogen, oxygen, nitrogen, chlorine, CO2, acetylene, ethylene, methane, ethane, propane, SO3, SO2, natural gas, coal gas.

Vacuum pressure swing adsorption and desorption of oxygen machine

Vacuum pressure swing adsorption and desorption of oxygen machine (referred to as VPSA oxygen), which penetrates under molecular sieves 13x atmospheric pressure conditions, using VPSA special air Selective Adsorption nitrogen,molecular sieve desiccant carbon dioxide and water and other impurities, vacuuming 4a zeolite molecular sieves under the conditions of the molecular sieve desorption, and thus the cycle to obtain high purity oxygen (90 to 94%). VPSA low energy consumption, the greater the power consumption and low equipment.

molecular sieve drying Under a certain pressure

molecular sieve drying Under a certain pressure, as the temperature decreases, the moisture content of natural gas saturated water will fall. Thus, reducing the gas temperature of the gas can  molecular sieve design  be partially condensed steam precipitation method of dewatering. This method requires the use of gas expansion get cold, and can simultaneously control the water dew point and hydrocarbon dew point, 5a molecular sieves  therefore, mostly for high-pressure gas condensate or high-pressure wet containing heavy hydrocarbons such as natural gas wellhead pressure for the use of excess occasion. If the low pressure associated gas for use in high pressure or no pressure wet gas, we need a refrigerant cooling.

The most representative adsorbent is activated carbon adsorption is quite good

Using multiple adsorption column effluent oil content according to the level of a series of sewage treatment,molecular sieve adsorbent oil content in the effluent monitoring at, if the water quality  molecular sieve adsorbent  is not up to then enter the circulatory system to continue processing until the compliance date. If oily wastewater COD, emulsion content is higher, before entering into the first reactor COD removal device and emulsion and dissolved substances such  regeneration of molecular sieves  as pretreatment removal device.
The most representative adsorbent is activated carbon adsorption performance is quite good, but the cost is relatively high, the event has been applied in the Songhua River water for adsorption of toluene. Then there zeolite, silica gel, activated aluminum, polymer adsorbent and biological adsorbents, etc.

This requires to develop alumina industry

This requires to develop alumina industry. Since 1954, Shandong Aluminum production, there Zhengzhou Aluminum Plant, Guizhou Aluminum Plant, Shanxi Aluminum Plant put into operation. Alumina production capacity of 1.2 million tons or more. In order  activated zeolite powders  to meet the needs of the development of the aluminum industry are planning to build a peaceful fruit Zhongzhou Aluminum smelter;and expansion of old plants need to gradually form an alumina base molecular sieve drying in Central China, Northwest, Southwest aluminum base for a more reasonable layout. Alumina production and species will continue to increase. According to the characteristics and production status of bauxite resources, the total recovery of  molecular sieves drying  alumina and alkali consumption compared with similar foreign factories, reached the advanced level. And most economical way to recover from the mother liquor circulation gallium; successful use of the alumina production waste - red mud production of cement, from the surface to improve the overall efficiency of alumina production. At present, the main technical development direction of China's aluminum industry is: continue to develop baked knot and joint production process, using indirect heat strengthened dissolution, fluidized roasting and other new technologies and high equipment.

molecular sieve desiccant

Common physical adsorption desiccant silica gel desiccant, clay desiccant, molecular sieve desiccant, mineral desiccant, fiber desiccant, montmorillonite desiccant.
molecular sieve desiccant
A desiccant material that can remove water in the wet material, often divided into two categories: a chemical agent such as calcium sulfate and calcium chloride, hydrate with water, dried by binding; physical desiccant such as silica gel and the active alumina and the like，molecular sieve grace  by physically adsorbed water and dried.
Moisture control is the product yield is closely related to food, in the appropriate temperature and humidity, food, bacteria and mold will be breeding at an alarming rate, so that food spoilage, resulting in moisture and color changed. Electronic products due to high humidity will cause the metal oxide, adversely. The desiccant is used in order to avoid the occurrence of excess water caused by defective products.