When industrially separating gas mixtures that can absorb gas, the adsorption operation has significant advantages. At present, due to the development of adsorption technology and the emergence of new adsorbents, the adsorption process is used in cryogenic air separation units and atmospheric pressure swing adsorption air to produce oxygen and produce The application of nitrogen equipment has become a routine choice. In cryogenic air separation, molecular sieve adsorbers are used in air purification systems, so that carbon dioxide in the air is less than 1 ppm, and water is less than 5 ppm. The process of using molecular sieve to produce oxygen and nitrogen from the air by pressure swing adsorption at room temperature has also become another air separation device.
According to the size of the cryogenic air separation unit, it can be divided into vertical radial flow adsorber and horizontal radial flow adsorber.
1. Schematic diagram of horizontal radial flow molecular sieve adsorber:
The adsorbent of the horizontal molecular sieve is loaded through the upper manholes at both ends, the lower layer is alumina to remove moisture from the air, and the upper layer is molecular sieve to remove carbon dioxide, acetylene and other hydrocarbons, and the middle is separated by a partition. The molecular sieve air outlet pipe is equipped with a gas distributor and a dust filter cartridge, and the air inlet pipe is equipped with a gas uniformly distributed baffle.
Advantages: mature technology, simple structure and process design, easy maintenance.
Disadvantages: large floor area, large working resistance, slow flow rate, uneven air distribution, high energy consumption.
2. Schematic diagram of vertical radial flow molecular sieve adsorber:
The vertical adsorber is composed of an outer shell, three-layer grid and a central tube. The activated alumina is installed in the interlayer between the outer grid and the middle grid, and the molecular sieve is installed in the interlayer between the middle grid and the inner grid. , The weight of all alumina and molecular sieves is supported by a three-layer grid suspended on the upper head. The upper part of the cylinder is equipped with a charging tube for filling alumina and molecular sieves.
When the purifier is working, the air enters from the bottom, first passes through the alumina layer to remove the moisture in the air, then passes through the molecular sieve layer to remove carbon dioxide, acetylene and other hydrocarbons, and is discharged from the top of the container through the filter.
When the purifier is regenerated, the polluted nitrogen from the cold box enters from the top of the container and is discharged from the bottom, in the opposite direction to that of adsorption. The central cylinder not only functions as a filter, but the special structure at the center can ensure that the forward air or regenerated backflow air has the same gas velocity in each section, so that the adsorption speed and adsorption capacity of each part of the adsorption bed along the axial direction are uniform. , The adsorption saturation time is the same.
Advantages: uniform air distribution, small footprint, small resistance, fast flow rate, and low energy consumption.
Disadvantages: complex structure, complicated process design, high manufacturing cost, and difficult maintenance.
Because of the adsorption performance of 13X molecular sieve, can be a long period of water and carbon dioxide adsorption in the air, its adsorption belongs to the balance separation type.
Jalon’s JLPM series molecular sieves are mainly used for cryogenic drying of general industrial gases. The purification system in the air separation unit removes H2O and CO2, as well as natural gas and other hydrocarbon desulfurization (removal of H2S and mercaptans) and CO2.
It is worth mentioning that North Copper Co. LTD, Yuanqu Smelter overhaul air separation unit using high efficiency molecular sieve, activated alumina projects use Jianlong JLPM fifth-generation cryogenic air separation molecular sieve. The equipment molecular sieve was replaced on April 12th, 2020, and it was put into operation on April 26th. From May 5th to May 8th after 72 hours of full-load operation, the CO2 at the outlet of the molecular sieve adsorber is stable at 0.2-0.3ppm, which meets the customer’s requirements for CO2 ≤1ppm. The adsorption cycle is extended from 4 hours to 8 hours, so that the number of molecular sieve adsorber regenerations is reduced from 6 to 3, which not only extends the service life of equipment valves and molecular sieve, but also reduces the power load, and has a significant energy saving effect.
Jalon fifth-generation high-performance molecular sieve JLPM is an X-crystal molecular sieve suitable for air pre-purification devices. It not only can efficiently adsorb CO2 and water vapor, but also has good dynamic characteristics and physical characteristics. Under standard process conditions, JLPM usually works synergistically with alumina and has a very high adsorption capacity for water vapor and CO2 . Instead of 13X molecular sieve, the adsorption cycle can be doubled after optimized filling.
Otherwise, The fifth-generation high-performance molecular sieve JLPM will bring multiple benefits to air separation designers and air separation operators. For the design of new air separation units, the application of JLPM can make the area of air separation smaller, thereby reducing equipment investment and operating costs; for the transformation of old equipment, the replacement of JLPM molecular sieve can reduce energy consumption and extend the service life of equipment.
This letter is to inform you that we evaluated Molecular Sieve JLOED 3.0-5.0 MM product from Luoyang Jalon Micro-nano New Materials Co., Ltd to dry our organic solvents for production of electrolyte for Li ion battery. The resulting organic solvents that went through our process with the Molecular Sieve JLOED 3.0-5.0 MM product in our R/D and production facility located in Chico, CA, US passed our specifications showing extremely low content of moisture, below 10ppm. This Molecular Sieve product met our quality requirement, and it is highly recommended for use in the industry of Li ion battery for drying of organic solvents. We also appreciate the technical support from the company.
Nanotech Energy
Luoyang Jalon Micro-nano New Materials Co., Ltd. JLPM series molecular sieves are mainly used for cryogenic drying of general industrial gases. The purification system in the air separation unit removes H2O and CO2, as well as natural gas and other hydrocarbon desulfurization (removal of H2S and mercaptans) and CO2.
It is worth mentioning that Yuntianhua United Commerce Co., Ltd. Company 52000 Nm3/Cryogenic air separation unit project. The design and manufacture method of the air separation unit by air, adsorber adopt vertical radial flow design, processing capacity of 311352 nm3 / h, 5.13 Bar (A) adsorption pressure, loading type my company JLPM3 efficient molecular sieve 92 tons, 107 tons of activated alumina, can ensure that the CO2 content in the air mean 1000 parts per million (2000 PPM) instantaneous equipment and stable operation, export CO2 molecular sieve < 0.1 PPM.
The fifth-generation high-performance molecular sieve JLPM1 is an advanced molecular sieve used in the pre-purification unit (APPU) of air separation equipment. Compared with previous generations, the fifth-generation high-performance molecular sieve JLPM1 has significantly improved CO2 adsorption capacity; the fifth-generation high-performance molecular sieve JLPM1 will bring multiple benefits to air separation designers and operators. For the design of the new air separation plant, the application of the fifth-generation high-performance molecular sieve JLPM1 can make the air separation occupy a smaller area, thereby reducing equipment investment and operating costs. The fifth-generation high-performance molecular sieve JLPM1 can also be used for the transformation of old equipment, which can reduce energy consumption or improveair separation processing capacity.
Oxygen molecular sieve is an important material to ensure the work of VPSA oxygen production equipment. This project is another successful case of our JLOX-103 lithium-type high-efficiency oxygen molecular sieve.
The 30000Nm3/h pressure swing adsorption (VPSA) oxygen production project of Zhuhai Yueyufeng Iron and Steel Co., Ltd., designed and built by CSSC Huanggang Precious Metals Co., Ltd., was successfully started up on June 27, 2019. As of May 29, 2020, the device has been operating stably for 11 months, and all indicators are better than the design indicators. It has been highly recognized and praised by customers, and has created a cumulative effect of 150 million yuan per year for the enterprise. At the same time, the project has realized intelligent oxygen production, mobile control and remote monitoring to guide production, helping to realize the green and intelligent promotion of the industry.
The project uses 4 sets of pressure swing adsorption (VPSA) oxygen generators in parallel. The single set of device is designed to produce 7500Nm3/h of oxygen and 80% oxygen purity. It is filled with our company (Luoyang Jalon Micro Nano New Materials Co., Ltd.) JLOX-103 lithium-type high-efficiency oxygen molecular sieve is 68 tons, the actual oxygen output reaches 7650Nm3/h, and the oxygen concentration is above 82.3%. The 4 sets of equipment in this project are filled with 272 tons of our JLOX-103 oxygen molecular sieve, with a total oxygen production of more than 30000Nm3/h.
Oxygen molecular sieve is an important material to ensure the operation of VPSA oxygen production equipment. This project is another successful case of our company’s JLOX-103 lithium-type high-efficiency oxygen molecular sieve.
Luoyang Jalon Micro-nano New Materials Co., Ltd. JLOX-100 series high-efficiency oxygen generation molecular sieve is a lithium X-type aluminosilicate crystal, which is an oxygen generation molecular sieve with international advanced level. Widely used in: iron and steel, non-ferrous metallurgy, chemical industry, furnace energy-saving transformation, environmental protection, papermaking, aquaculture, medical care and other industries.
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