Common faults and treatment methods of PSA nitrogen generator
1. During operation, the large pressure displayed on the meter head can not reach the set value. It is caused by the leakage device. Perform a comprehensive leak detection on the gas circuit, especially the drying room and the battery. 2. Check whether the battery is leaking or broken 3. There is noise during the operation of the instrument It is the solenoid valve sound: use a 14 wrench to properly adjust the tightness of the nut on the solenoid valve, not too tight; if not, you need to disassemble the solenoid valve to clean the interior (the sound is mainly due to impurities in the solenoid valve internal organs), and return it after cleaning. No, it must be replaced with a new one. Four, there is gas output when starting up When the pressure rises just after the start-up, you must press the red delay switch on the front, and then the output pressure will be released from the output and wait for 10 minutes before it can be used. The above is the most common troubleshooting of PSA nitrogen generator.
Industrial activated carbons covering fields and applications
1 Functional activated carbon activated carbons Activated carbon is an important functional material for national economic development and national defense construction. Activated carbon can be used for gas phase adsorption, liquid phase adsorption, electronic materials, medical treatment and many other aspects, and can be used as a catalyst and catalyst carrier. In recent years, with the rapid development of environmental protection, new energy and other industries, the market demand for functional activated carbon has surged. 2 Activated carbon modification Industrial development has increased the requirements for the adsorption capacity and catalytic activity of activated carbon. Conventional activated carbon can no longer meet the special requirements of various fields, and super activated carbon has emerged as the times require. Super activated carbon has a huge specific surface area and excellent adsorption performance, so it is widely used in fuel gas adsorption and storage, gas separation, catalyst carrier, electrode material of super capacitor and so on. In many applications, special activated carbon has also appeared, such as nickel-coated activated carbon suitable for removing alkyl sulfides in gas or exhaust gas, and special activated carbon for citric acid. Although the advantages of super activated carbon are obvious, the application of shortcomings is insufficiently studied, especially in the process of preparation and use, there are still some shortcomings that need to be further studied and improved. Activated carbon modification is to adjust its adsorption performance, adsorption capacity, catalytic activity and other properties to meet specific working conditions and application conditions. The modification of the adsorption performance of activated carbon is currently mainly focused on two aspects. One is to develop activated carbon with special properties, such as activated carbon fiber and wood activated carbon. The other is to modify the activated carbon to adjust the pore structure of activated carbon to improve the specific adsorption properties. Absorption capacity or desorption capacity. Activated carbon fiber (ACF) is the third-generation activated carbon product. It can be made into products of any shape, which can be decolorized and deodorized. It is suitable for solvent recovery devices, water purifiers, ozone filters, anti-virus masks, medical bandages, cigarette filters, Precious metal recovery equipment, etc. ACF is mainly used to treat micro-polluted raw water and low-concentration wastewater. One of the main reasons limiting its wide application is the high price.
The effect of industrial activated carbons on the environment
Until the 21st century, the application fields of activated carbons have been further expanded. Activated carbon is also involved in many high-tech fields such as environmental protection, energy and catalysts, gas storage, chemical separation, and biological organisms. Among them, the treatment and purification of industrial waste gas by activated carbon, including the removal of formaldehyde gas, is mainly dependent on its gas phase adsorption application, and activated carbon is dependent on it for pharmaceutical and chemical wastewater, precious metal recovery, and the most basic water treatment. The application of liquid phase adsorption is precisely because of the unique characteristics of activated carbon, so it is always indispensable when treating waste gas and wastewater. Nowadays, the development of activated carbon is becoming more and more diversified, and when dealing with different pollution, scientists have also developed different types of activated carbon to deal with. Targeted development of activated carbon with special adsorption properties has also become a top priority. It is hoped that one day activated carbon can better improve the environment and return the environment to its origin.
Quickly understand the classification of activated carbon
Activated carbon is a kind of black porous solid carbon, which is produced by pulverizing and shaping coal or carbonizing and activating uniform coal particles. The main component is carbon, and contains a small amount of oxygen, hydrogen, sulfur, nitrogen, chlorine and other elements. The specific surface area of ordinary activated carbon is between 500 and 1700 m2/g. It has strong adsorption performance and is an industrial adsorbent with a wide range of uses. Activated carbon is a traditional and modern man-made material, also known as carbon molecular sieve. Classification: According to the different sources of raw materials, manufacturing methods, appearance and shape, and application occasions, there are many types of environmentally friendly activated carbon. Up to now, there are no measurable statistical materials, and there are about thousands of varieties. According to the source of raw materials: 1. Wooden activated carbon; 2. Animal bones, blood charcoal; 3. Mineral raw material activated carbon; 4. Other raw material activated carbon; 5. Regenerated activated carbon. According to the manufacturing method: 1. Chemical activated carbon (chemical carbon); 2. Physical activated carbon; 3. Chemical-physical or physical-chemical activated carbon. According to appearance shape: 1. Powdered activated carbon; 2. Granular activated carbon; 3. Unshaped granular activated carbon; 4. Cylindrical activated carbon; 5. Spherical activated carbon; 6. Activated carbon of other shapes. According to the aperture: Macropore radius>20 000nm; transition pore radius 150-20000nm; micropore radius<150nm The surface area of activated carbon is mainly provided by micropores. Classified by material: Coconut shell activated carbon; nut shell activated carbon (including apricot shell activated carbon, fruit core shell activated carbon, walnut shell activated carbon); wooden activated carbon; coal-based activated carbon.
Activated alumina as a catalyst and carrier for chemical reactions
Activated alumina has a large specific surface area, a variety of pore structures and pore size distributions, and rich surface properties. Therefore, it has a wide range of uses in adsorbents, catalysts and catalyst carriers. Alumina for adsorbent and catalyst carrier is a fine chemical and also a special chemical. Different uses have different requirements for physical structure, which is the reason for its strong specificity and many varieties and grades. According to statistics, the amount of alumina used as catalysts and carriers is more than the total amount of catalysts using molecular sieve, silica gel, activated carbon, diatomaceous earth and silica alumina gel. This shows the pivotal position of alumina in catalysts and carriers. Among them, η-Al2O3 and γ-Al2O3 are the most important catalysts and supports. They are both spinel structures containing defects. The difference between the two is: the tetrahedral crystal structure is different (γ>η), and the hexagonal layer stack The row regularity is different (γ>η) and the Al—O bond distance is different (η>γ, the difference is 0.05～0.1nm).
Carbon molecular sieves is a new type of non-polar adsorbent
The ability of molecular sieve to separate air depends on the diffusion speed of various gases in the air in the pores of Carbon Molecular Sieves, or the adsorption force, or both. Carbon Molecular Sieves PSA air separation nitrogen production is based on this performance. Carbon Molecular Sieves are used to produce nitrogen. The N2 concentration and gas production volume can be adjusted according to the user's needs. When the gas production time and operating pressure are determined, the gas production volume will be lowered, and the N2 concentration will increase, otherwise, the N2 concentration will decrease. Users can adjust according to actual needs.