Cryogenic Oxygen And Nitrogen Plants

Shenger Gas's cryogenic oxygen and nitrogen plants adopt modular design and advanced process control technology to ensure the reliability, automation and energy efficiency of the equipment. The equipment is not only capable of producing oxygen and nitrogen simultaneously or separately according to customer needs, but also has excellent load regulation capabilities to cope with fluctuating gas demand. Whether it is used as an on-site gas generation (On-site Gas Generation) to replace expensive bottled gas or liquid nitrogen purchases, or to establish an independent gas production facility, this system is an economical and reliable choice.

Working principle and system structure

The core of Cryogenic separation lies in "freezing" and "fractionation".

1. Working principle: After the ambient air is filtered to remove dust, it is compressed by the air compressor. Subsequently, the compressed air enters the pre-cooling system and molecular sieve purification system to completely remove moisture, carbon dioxide and hydrocarbons. The purified air enters the main heat exchanger, exchanges heat with the returning low-temperature product gas, and is cooled to close to the liquefaction temperature (about -172°C). After that, the air enters the fractionation tower system, taking advantage of the difference in boiling points of the oxygen and nitrogen components (oxygen boiling point -183°C, nitrogen boiling point -196°C). In the rectification tower, the rising steam fully contacts the downstream liquid to perform mass and heat transfer. Eventually, nitrogen is enriched at the top of the upper tower due to its lower boiling point, while liquid oxygen accumulates at the bottom of the lower tower, thus completing the separation.

2. System structure: A complete set of cryogenic oxygen and nitrogen Plants mainly consists of the following subsystems:

• Air compression system: Provides the power and air source required for separation.
• Air pre-cooling and purification system: ensure that the air entering the cryogenic core is clean and dry.
• Heat exchange system: achieve efficient energy recovery and reduce system energy consumption.
• Expansion refrigeration system: Provides the system with the required cooling capacity.
• Fractionating tower system: the core of the equipment, completing the precise separation of oxygen and nitrogen.
• Product compression and storage system: pressurize the product gas to the required pressure or liquefy it for storage.
• Fully automatic control system: integrated PLC/DCS to achieve unattended and remote monitoring.

Main Technical Parameters

The following are the technical specifications for typical equipment series. Specific parameters can be customized according to client requirements.

Industrial Applications and Case Studies

1. Wide application fields:

• Metal processing and metallurgy: oxygen top blowing in steelmaking, oxygen-enriched blast in blast furnaces; nitrogen used for annealing and sintering protection.
• Chemical and petrochemical industry: Oxygen is used for oxidation process and gas generation; nitrogen is used for pipeline purging, material replacement, and atmosphere protection.
• Electronic manufacturing: High-purity nitrogen is used as protective gas for the production of semiconductors and LCD panels.
• Medical and Health: Produces medical oxygen to supply hospital respiratory therapy and intensive care.
• Food and Beverages: Nitrogen is used for nitrogen-filled packaging of food and filling and preservation of beverages.
• Glass manufacturing: Oxygen assists combustion to increase furnace temperature, and nitrogen is used for cooling and protection.

2. Successful cases:

In order to reduce the cost of outsourcing liquid nitrogen, a large steel company adopted a set of cryogenic nitrogen production equipment from our company with a nitrogen production capacity of 5000 Nm³/h. After the equipment is put into operation, it not only achieves self-sufficiency in nitrogen, but also saves more than 30% of energy and procurement costs annually. The purity and pressure are stable, effectively ensuring the continuous operation of the production line.

Advantages and limitations 

1. Core advantages:

• High Purity and Large Scale: Ultra-high purity oxygen and nitrogen can be economically produced and process a wide range of gas volumes.
• Low operating costs: Compared with other separation methods (such as PSA), the unit cost is more competitive in large-scale applications.
• Stable and reliable operation: long design life, continuous operation for several years, and long maintenance cycle.
• Dual product output: can produce oxygen and nitrogen at the same time to maximize resource utilization.

2. Limitations:

• Long start-up time: It takes several hours to dozens of hours from startup to stable production of qualified gas.
• Not suitable for small gas volumes: For extremely small-scale gas consumption, investment and energy consumption are relatively uneconomical.
• Requires professional maintenance: involving cryogenic technology and high-pressure equipment, a professional team is required for maintenance.

Our cryogenic oxygen and nitrogen plants are the result of many years of technical accumulation and engineering practice experience. Each set of equipment has undergone strict factory testing to ensure that a set of high-quality products that are efficient, stable, and energy-saving are delivered to customers. Choosing Shenger means choosing a long-lasting and reliable industrial gas guarantee. Welcome to contact us to obtain exclusive technical solutions and detailed quotations.

Shenger's products are divided into the following categories: various gas purification devices, PSA nitrogen plant, PSA oxygen plant, VPSA oxygen plant, waste heat regeneration air dryers, heatless regeneration dryers, micro-heat regeneration dryers, refrigerated type Dryers, combined dryers, cryogenic air separation plants, etc.

Our products are widely used in metallurgy, electric power, chemical, petroleum, electronic, biological, pharmaceutical, chemical fiber, food, rubber and other industries.

 

The produce of distillation column

The frame of cold box

the plate rolling in factory

 

Hot Tags: cryogenic oxygen and nitrogen plants, China cryogenic oxygen and nitrogen plants manufacturers, suppliers, factory, Cryogenic Liquid Nitrogen Plant, , , ,