Hello, boss. If you want to buy air separation device to help your industry, this paper will explain the industrial oxygen and nitrogen machine manufacturing technology, equipment configuration, selection points, maintenance knowledge, use and market trends, and provides a detailed technical analysis, very suitable for technical report or industry research framework, and to buy oxygen generator and nitrogen machine to provide strong theoretical support and data support.
The use of industrial oxygen and nitrogen production
The use of the industrial oxygen production
The strong flammability of oxygen makes it an important raw material for high temperature industries such as steelmaking, smelting and glass melting, and improves the production efficiency, especially in metallurgical, chemical and other industries, oxygen combustion greatly improves the reaction speed. In terms of safety and environmental protection, the use of oxygen for sewage treatment, waste incineration and combustion optimization of thermal power plants can effectively reduce environmental pollution and fire risk. Hospitals will also need to use oxygen therapy and hyperbaric oxygen chambers.
The use of industrial nitrogen production
The low reactivity of nitrogen makes it widely used in metal heat treatment, electronic manufacturing, food preservation and other fields to avoid oxidation and contamination. The inert protection of nitrogen can prolong the shelf life of food and reduce oxidative deterioration. In the oil and gas industry, nitrogen can be used for pipeline purging, explosion prevention and gas field pressurization to ensure safe production. The liquid nitrogen rose is also a derivative of scientific research. liquid nitrogen is often used to preserve biological samples, laboratory freezing and special processing processes. Oxygen and nitrogen, as the basic resources of the modern industrial system, play an irreplaceable role in promoting production efficiency, ensuring safety and environmental protection, and promoting the progress of science and technology.
A brief history and development trend of air separation technology
A brief history of technology
At the end of the 19th century, German chemist Linde (Carl von Linde) invented the first air liquefaction unit, which laid the foundation for the deep cold air separation technology. But it was only at the beginning of the 20th century that deep cold separation technology was widely used for industrial oxygen production in steel mills and chemical plants. In the 1970s, pressure change adsorption (PSA) and membrane separation technology appeared for small-scale gas production and efficient gas purification. After entering the 21st century, automation and intelligent technology have been applied to air separation equipment to realize remote monitoring and efficient operation.
Trend of development
It can be predicted that the air separation technology will continue to combine the Internet of Things technology in the future to continuously improve the operating efficiency and fault warning capability of the equipment. And emphasize green manufacturing and energy saving, reduce energy consumption, improve oxygen and nitrogen production efficiency, reduce carbon emissions, to meet the requirements of environmental protection. With the growth of liquid oxygen and liquid nitrogen demand and the expansion of the liquid nitrogen gas market, liquefaction equipment will become the new favorite in the market.
Of course, as the industrialization of emerging markets (such as Asian and African countries) accelerates and the demand for oxygen and nitrogen production continues to increase, the regional markets will continue to expand.
The development of air separation technology not only improves the efficiency of gas manufacturing, but also promotes the progress of modern industry. In the future, this field will usher in more innovations and breakthroughs in intelligence, energy conservation and environmental protection.
Principles of air separation technology
Cryogenic Air Separation
Cryogenic Air Separation is to obtain high purity oxygen, nitrogen (oxygen> 99.5%, nitrogen> 99.999%) by liquefaction of air and distillation of other rare gases (such as argon), and is suitable for large-scale gas production. But its investment and operation costs are high, the equipment is huge, suitable for the fixed plant station.
- Air compression: compress the air to a certain pressure.
- Pre-cooling: use cold water or a freezer to cool the air to near zero to remove water and carbon dioxide.
- Air liquefaction: the air enters the heat exchanger to cool below-170℃, part of the air is liquefied.
- Distillation: Using different boiling points of oxygen (-183℃) and nitrogen (-196℃) to separate them step by step.
- Purification and collection: to obtain a high purity of industrial oxygen, nitrogen, and argon.
Pressure Swing Adsorption, PSA
Pressure Swing Adsorption, PSA uses the selective adsorption of adsorbent (such as molecular sieve) at different pressures to separate oxygen or nitrogen. And low energy consumption, simple equipment structure, rapid start and stop, suitable for small and medium-scale gas production. However, the gas purity is limited (oxygen about 93% ± 3%, nitrogen maximum 99.99%), and the adsorbent also needs to be replaced and maintained regularly.
- Air compression: to compress the air to a certain pressure.
- Adsorption separation: compressed air into the adsorption tower, the adsorbent selectively adsorbed nitrogen (oxygen) or oxygen (nitrogen) in the air.
- Desorption regeneration: when the adsorbent is near saturation, reduce the pressure in the tower and release the adsorbed gas to regenerate the adsorbent.
- Rotation operation: the twin towers run alternately to achieve continuous gas production.
Membrane Separation
Membrane Separation uses special polymer film to different speed of gas to achieve gas separation. The components such as oxygen and nitrogen have different penetration rates when crossing the membrane material to achieve the separation. The equipment is compact, easy to move, suitable for field applications, easy to operate, and easy to start and stop. However, the gas purity is low, usually oxygen in 30% -40%, nitrogen can be up to 95%, the membrane maintenance and life span have high requirements.
- Air compression: compress the air into the membrane assembly.
- Membrane filtration: oxygen passes through the membrane more quickly, while nitrogen passes through it more slowly.
- Separation product: High concentrations of oxygen or nitrogen are isolated according to the rate of gas flow through the membrane.
Comparison of the various techniques
| technology | pureness | production capacity | capitalized cos | energy consumption | applicable scene |
| Cryogenic Air Separation | O₂ >99.5% N₂ > 99.999% | large-scale | high | high | iron and steel, chemical industry, large gas plant and station |
| Pressure Swing Adsorption, PSA | O₂ 93±3% N₂ >99.99% | Small and medium-sized | middle | middle | medical use, electronic use, and food preservation |
| Pressure Swing Adsorption, PSA | O₂ 30%-40% N₂ about95% | small-scale | low | low | food packaging, pipe purging |
Each technology, according to different scenarios and needs, plays its own advantages in production. In the future, with the promotion of the concept of intelligent and green environmental protection, various separation technologies will continue to improve and complement each other.
Industrial oxygen production and equipment configuration
PSA oxygen generator process flow
PSA oxygen generator with clean compressed air as raw material, With a high-quality zeolite molecular sieve as an adsorbent, Of producing oxygen from the air at a certain pressure, After purified and dried compressed air in the adsorbent, Pressure pression and desorption, Due to the aerodynamic effect, The diffusion rate of nitrogen in the pores of the zeolite mesh is much larger than oxygen, Nitrogen is preferentially adsorbed by zeolite molecules, Oxygen is enriched in the gas phase, Forming the finished product of oxygen, Then, by reducing the pressure to atmospheric pressure, Adsorbent desorents the adsorbed nitrogen, such as impurities, To achieve the regeneration, Two adsorption towers are generally provided in the system, A tower of adsorption to produce oxygen, Another tower, desorption and regeneration, The PLC procedure controls the opening and closing of the pneumatic valve, Make the two towers alternate alternately, To obtain high purity oxygen (93% ± 3%).
Process flow chart of the PAS nitrogen generator
Operation of the PSA oxygen production equipment
- Start-up preparation: check the status of the equipment to ensure the normal operation of the air compressor and cold dryer. Ensure that the filter and adsorption tower are in good condition, with no abnormal sound and vibration.
- Start the equipment: start the air compressor, set the pressure and flow rate. Start the cold dryer and filter to ensure that the air is dry and clean.
- Monitoring operating parameters: oxygen purity, flow, pressure and temperature, ensure within the set range. Check the pressure change of the adsorption tower regularly to determine the saturation state of the adsorbent.
| operating process: | |
| Boot preparation | Check the status of the equipment to ensure that the air compressor and cold dryer operate normally.Ensure that the filter and adsorption tower are in good condition, with no abnormal sound and vibration. |
| starting device；trigger | Start the air compressor and set the pressure and flow rate.Start the cold dryer and filter to ensure that the air is dry and clean. |
| Monitor operating parameters | Monitor oxygen purity, flow, pressure and temperature to ensure within the set range. Check the pressure change of the adsorption tower regularly to determine the saturation state of the adsorbent. |
| machine halt | Close the oxygen output valve and gradually reduce the pressure when stopping.Check the operation of the equipment regularly and record the data for analysis. |
Industrial nitrogen production system and equipment configuration
PSA nitrogen generator process flow
- There are two adsorption towers equipped with A carbon molecular sieve. When one tower (A) works, the other tower (B) desorbes under reduced pressure.
- When the clean air enters the adsorption tower (A), the oxygen, carbon dioxide and water are adsorbed through the molecular sieve, and the gas flowing to the outlet end is nitrogen and the trace amount of argon and oxygen.
- The other tower (stripping tower B) separates the absorbed oxygen, carbon dioxide and water from the pores of the molecular sieve and discharges them into the atmosphere.
- In this way, the two towers take turns to complete the nitrogen and oxygen separation, and continuously output the nitrogen gas.
- 95% -99.9% of the output of nitrogen nitrogen into the nitrogen purification equipment.
- Then through the dryer deep drying (two adsorption drying tower alternately: one adsorption drying and dehydration, the other heating desorption drainage), then the purity of nitrogen can reach 99.9997%.
- The final product is high pure nitrogen produced on site, which costs far below the price of a liquid or bottled gas.
Video display of PSA nitrogen manufacturing machine process flow
Selection and design of industrial oxygen and nitrogen generator
First, the gas production of the equipment is selected according to the actual use demand to ensure that the peak demand is met. Secondly, different industries have different purity requirements for oxygen, so suitable technologies (such as PSA or deep cold separation) should be selected. In addition, the equipment layout should also be designed according to the plant area and production capacity to ensure easy operation and maintenance. It is best to choose high energy efficiency compressor and cold dryer, reduce energy consumption, in line with environmental standards. Of course, the equipment design should also take into account the convenience of maintenance and operation, reducing downtime and maintenance costs. It is also important to ensure that the equipment meets safety standards, including safety precautions and monitoring systems for high-voltage equipment.
In short, the design and selection of oxygen production equipment should comprehensively consider many factors, such as gas production, gas purity, equipment scale and layout, energy efficiency and environmental protection, maintenance and operation convenience, and safety design, so as to ensure that the equipment operates under efficient and safe conditions and meet the actual production needs.
How to choose the right PSA oxygen generator？
1. Calculate how many cubic meters of oxygen per hour are required?
There are two types of production of oxygen
- Direct connection to the hospital oxygen supply system
- In Hospital oxygen production, each patient requires oxygen of 20 l/mins, requiring 1.2 m³ /hour.
- Filled oxygen cylinders
- For filling oxygen cylinders, it is necessary to determine 1. the type of oxygen cylinder and 2. the working pressure.
eg, 40L/200bar oxygen cylinder, 40*200=8000L, about 8m³ of oxygen capacity, then multiply, e.g., filling 100 cylinders/day.100*8=800 m³ of oxygen /day. the oxygen plant working 20 hours, 800/20= 40, then 40 m³ oxygen machine is your model
2、Tell us the altitude of your local area
Normal poster below 1km. Higher altitudes require additional compressors
3、Determine your local voltage and frequency
The voltage in Australia is 240V and the frequency is 50HZ.
The voltage in Belgium, France is 230V and the frequency is 50HZ.
How to Choose PSA Nitrogen Plant?
- Choose the right nitrogen concentration：Incorrectly selected concentration can become a factor in a significant increase in the price by several times. A difference of 0.05% in concentration can double the cost of the system.
- Calculate station performance：Considering all consumer parameters, calculate the total amount of nitrogen consumed. Pay attention to the units of measurement, the flow must be normalized, Nm³/h at a pressure of 1 bar and a temperature of 20°C.
- Consider the operating conditions：All parameters of the station are specified under standard operating conditions of 20°C, The temperature rises above 38℃ will affect the air compressor, so be sure to keep the use of the site ventilation heat
- Choose a compressor with a margin of 10%：For the correct operation of the system, many factors must be taken into account: the nature of consumption, the number of peak loads, additional losses of compressed air, the volume of receivers, and much more.
- How much cost:Start a small 20m³ PSA N2 generator price is $12000. We promise a good price with top quality.
Maintenance and maintenance of industrial oxygen and nitrogen generator
Daily maintenance and maintenance of the oxygen generator
In order to ensure the normal operation of the oxygen generator and extend the service life, daily maintenance and maintenance are essential. It mainly includes the following aspects:
- periodic inspection Equipment appearance: Inspect the equipment shell, pipes and valves regularly to ensure no leakage, corrosion or other damage. Connections: Check all connections and pipes to prevent gas leakage.
- Filter replacement Air filter: replace the air filter regularly according to the running time to ensure good air quality and prevent impurities from entering the equipment. Oxygen filter: Oxygen filters should be checked and replaced regularly to ensure the purity and safety of oxygen.
- Filter replacement The performance of the molecular sieve is monitored regularly and replaced if necessary to ensure oxygen yield and purity.
- Lubrication and cleaning Lubrication: Lubricate the compressor and moving parts regularly to avoid wear. Cleaning: clean the heat sink of the cold dryer, cooler and other equipment to ensure a good heat dissipation effect.
- data logging Record the parameters of the equipment operation (such as flow, pressure, temperature, etc.), analyze the data regularly, and handle the abnormal situation in time.
Common problems and solutions of the nitrogen generator
In the process of using the nitrogen generator, there may be some common problems, and their corresponding solutions:
- Nitnitrogen purity: molecular sieve saturation, filter blockage or improper operation. Solution: Check and replace the molecular sieve and filter to ensure that the operation is according to specification.
- Equipment vibration or excessive noise: wear or loosening of mechanical parts. Solution: Check the installation and connection of the equipment, and tighten or replace the worn parts if necessary.
- Frequent equipment shutdown: insufficient air source pressure or system failure. Solution: Check the gas source pressure, confirm that the gas supply system is normal, and conduct maintenance if necessary.
- Insufficient nitrogen flow rate: adsorption tower blockage or equipment failure. Solution: Check the adsorption tower status, clean or replace if necessary.
Equipment shutdown and troubleshooting process
Equipment shutdown and troubleshooting are important links to ensure the normal operation of the equipment. The specific process is as follows:
- Downtime preparation Close the oxygen or nitrogen output valve to reduce the pressure. Record the equipment operation parameters before shutdown and save the data for subsequent analysis.
- troubleshooting steps Confirmation of fault: collect operator feedback and confirm fault type and performance. Check the power supply and control system: ensure the power supply is normal and check the control system for alarm information. Equipment appearance inspection: check for obvious damage or leakage outside the equipment.
- Step by step Sub-system inspection: check one by one according to the equipment structure, such as compressor, filter, adsorption tower and other components. Data monitoring: check the operating data and analyze the fault causes.
- Repair and reset Repair or replace any fault fault. After completion, do the system reset and prepare to restart the equipment.
- Restart the device After confirming that all problems are resolved, gradually start the equipment and monitor the operating parameters to ensure that everything is normal.
The maintenance and maintenance of industrial oxygen and nitrogen generator is the key link to ensure its efficient and stable operation. Through daily maintenance, troubleshooting and scientific management, the service life of the equipment can be effectively extended, reduce the failure rate and improve the production efficiency.
Application of technological innovation in the production of oxygen and nitrogen generator in MINNUO industry
Technological innovation is the core power to promote the progress of industrial gas production. The application of new technologies has played an important role in improving production efficiency, reducing energy consumption and improving gas purity.
- MINNUO advanced separation technology: such as membrane separation, deep cold separation and improved pressure change adsorption (PSA) technology, improve the efficiency and economy of gas separation.
- MINNUO energy saving and environmental protection technology: develop efficient and energy-saving compressor, cold dryer and filtration equipment to reduce the energy consumption and carbon emissions of industrial gas production.
- MINNUO intelligent equipment: introduce the Internet of Things, big data and artificial intelligence technology to realize the intelligent monitoring and prediction maintenance of equipment, and improve the operation reliability of equipment.
Conclusion
If you need to buy oxygen and nitrogen production machines, please trust the manufacturing technology, equipment configuration, selection points and maintenance of industrial oxygen and nitrogen production machines provided by MINNUO. We will actively adapt to the trend of green manufacturing and sustainable development, and constantly optimize the products, to provide you with the most reliable products.
