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Take quality as life and seek market with honesty

Analysis of advantages of nitrogen generator


Take science and technology as the guide, quality as the life, and honesty as the market

Safe and efficient

In strict accordance with ISO9001 GB standards, pressure vessel inspection specifications for production, to ensure long-term safe, efficient and reliable operation of products.

Excellent equipment

The cyclone type air diffusion device and the isolated compound bed make the air flow evenly distributed, reduce the high-speed impact of annual flow, make the gas more uniform in the adsorption and desorption process, make it more reasonable, make full use of carbon molecular sieve and increase the service life and nitrogen purity of carbon molecular sieve.

International brand

Most of the parts and control elements are made of international high-quality brands to improve the service life.

Precise design

According to the purity of nitrogen, the state of venting / finished product can be switched in real time, so that The unqualified waste gas of users can be effectively discharged when swabbing to ensure the nitrogen content of products
Gas quality.

Zhejiang Zhongyi Gas Technology Co., Ltd

Easy to install

Easy to install, operate and maintain.

Device safety

The self pressing device uses its own system gas source to sample and press. When the nitrogen generator starts to work, it will enter the working state. The internal piston always ensures that the molecular sieve is pressed, and at the same time, it will not crush the molecular sieve. It can avoid the pulverization of the molecular sieve caused by the impact of different adsorption / desorption air flow in the adsorption tower.

Nitrogen production efficiency

It adopts high-quality brand carbon molecular sieve, and its service life is more than 8-10 years under normal use.

Professional customization

Accept all kinds of special customization from customers.

Choose our four advantages


Brand strength

Do one thing with your heart
"Focus on gas separation" equipment


Quality service

Good product quality
Start from every link


Professional customization

Gas separation equipment


Quality Assurance

One-to-one full tracking
Attentive service

Zhongyi is willing to join hands with friends from all walks of life to create a better future


Appointment consultation

Customers propose detailed parameters or provide samples


Site inspection

Receive roughly input information from customers


Design plan budget price

Preliminary price checking and quotation according to the bill of materials


Technical confirmation

Perform rigorous various tests on samples


Signing the contract

After the information is confirmed, both parties sign the contract


Installation and commissioning

Carry out all aspects of debugging and inspection after the equipment is installed


Equipment acceptance

After accurate review by 6 major departments, rationally arrange production


Customer return visit

Routine return visits to customers



Zhejiang Zhongyi Gas Technology Co., Ltd.

Zhejiang Zhongyi Gas Technology Co., Ltd. is an enterprise specializing in the research and development, production and operation of industrial gas equipment. The company is located in Hangzhou Fuyang Economic and Technological Development Zone. The company has a research and development center, a manufacturing center and a marketing service center. It gathers high-level professional and technical personnel to provide customers with technical consulting, program design, product manufacturing, personnel training, installation and commissioning services. Adhering to the business philosophy of taking science and technology as the guide, quality as the life, and seeking the market with integrity, Zhongyi is willing to join hands with friends from all walks of life to create a better future.

— They chose us —

Thank you for your company along the way and witness the growth of Zhongyi Technology

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Adhering to the business philosophy of taking science and technology as the guide, quality as the life, and seeking the market with integrity, Zhongyi is willing to join hands with friends from all walks of life to create a better future.

Meet the needs and change as you want

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Whole process tracking, intimate service

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Sufficient spare parts, timely delivery

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Adhering to the business philosophy of taking science and technology as the guide, quality as the life, and seeking the market with integrity, Zhongyi is willing to join hands with friends from all walks of life to create a better future.

Industry News +More
Shocking air separation device explosion accident inventory, explosion cause analysis and control measures
Explosion accident of air separation unit at home and abroad On January 4, 1961, an air separation tower of a 4000m3/h air separation equipment in the former Federal Republic of Germany exploded, killing 15 people and seriously damaging the equipment and buildings. On November 23, 1973, the typical malignant explosion of the 3350m3/h air separation unit in Anshan Iron and Steel Oxyoxygen Plant occurred outside the tower, which also caused the explosion of the air separation base inside the tower. The equipment was destroyed in many places, and the production was resumed after six months of maintenance. On July 27, 1986, the 3200m3/h air separation equipment of Qianjin Chemical Plant of Yanshan Petrochemical Company made a loud noise, and the whole equipment became a pile of ruins. On November 1, 1992, an explosion occurred in the 150m3/h air separation tower of the oxygen station of Lanzhou Petrochemical Machinery Plant, resulting in the death of one person and the abandonment of the air separation tower. On July 25, 1993, the main condensing evaporator of 150m3/h air separation tower of Jinchuan Nonferrous Metals Company in Gansu Province suffered a crushing explosion, which killed one person on the spot and scrapped the air separation tower. On March 2, 1996, the 6000m3/h air separation equipment in Xinyu Iron and Steel Plant of Jiangxi Province, under the condition that no abnormal symptoms were found, the plate fin main condensing evaporator suddenly exploded, and the equipment was seriously damaged. The blast wave shattered the glass of the surrounding buildings. On July 18, 1996, the main cooling of the 10000m3/h air separation equipment in the air separation branch of Harbin Gasification Plant exploded, and the main cooling and upper tower were scrapped. On May 16, 1997, a malignant explosion occurred in the 6000m3/h air separation tower of Fushun ethylene chemical plant in Liaoning Province. The equipment and plant were seriously damaged,4 people died,4 people were seriously injured and 27 people were slightly injured. On December 25, 1997, a set of 81760m3/h air separation equipment of Malaysia Bintulu Shell Oil Company suffered a malignant explosion. The explosion started in the main condensation evaporator and expanded to the tower body; The lower tower is pressed into the ground; The upper tower and the main cold were blown 750 meters away; Window frames shattered within 5km and flying metal smashed oil and kerosene tanks, sparking the fire. August 21, 2000, Jiangxi Pingxiang Iron and Steel Company oxygen plant 1500m3/h air separation unit maintenance site of an explosion accident, resulting in 22 deaths, 7 serious injuries, 17 minor injuries. On July 7, 2003, when the 10000m3/h air separation equipment of Shanghai Cosco Chemical Co., Ltd. was preparing to hoist the upper column and the upper section of the coarse argon column, there was a loud noise, and the two-layer plastic color strip on the upper seal of the lower section of the coarse argon column was torn to pieces by the air waves. On August 22, 2003, the 20,00m3 /h air separation equipment in the oxygen plant of Maanshan Iron and Steel Corporation deflagrate occurred during installation, and people were ejected and 35% burned. After rescue, they escaped from the emergency. On September 17, 2003, during the installation of the 10000m3/h air separation equipment of Lengshui Iron and Steel Company in Hunan, a blast of gas burst out, and the welder was knocked out and fell off the platform. He died in the rescue. On April 10, 2017, an air separation accident occurred in Shenhua with 4 million tons of coal-to-oil The explosion occurred at 5:45 PM on July 19, 2019, in the air separation unit C of the Yima Gasification Plant of Henan Energy and Chemical Group in Sanmenxia, Henan Province. The explosion resulted in 15 deaths, 15 serious injuries and 256 hospitalizations. In recent years, with the large-scale of air separation equipment, the explosive energy of air separation equipment is also increasing. From the principle of explosion, air separation equipment can be divided into physical explosion and chemical explosion. Chemical explosions cause more harm than physical explosions. Causes of physical explosion of air separation equipment are as follows: 1. A large amount of high temperature gas enters the fractionation tower containing cryogenic liquid, and the cryogenic liquid rapidly vaporizes, resulting in increased pressure in the fractionation tower, slow pressure relief speed of the safety valve, and deformation and rupture of the air separation tower. 2, air separation, cold box is memory is cryogenic liquid of fractionating column filled with thousands of cubic perlite insulation materials, fractionating column leakage fault occurs, will have a lot of cryogenic liquid, perlite in high temperature gas, cryogenic liquid evaporation sharply, the ratio of cold box burst, a large nu
FAQ +More
Uses and common preparation methods of nitrogen
First, the nature of nitrogen Nitrogen, under normal conditions, is a colorless, tasteless, odorless gas and is usually non-toxic. Nitrogen accounts for 78.12% of the total atmosphere (volume fraction). At normal temperature, it is a gas. At standard atmospheric pressure, it becomes a colorless liquid when it is cooled to -195.8℃. When it is cooled to -209.86℃, liquid nitrogen becomes a snow-like solid. Usage: chemical synthesis (synthetic nylon, acrylic fiber, synthetic resin, synthetic rubber and other important raw materials), automobile tires (nitrogen can effectively reduce the noise of tires, prolong the service life of tires). Because nitrogen is chemically inert, it is often used as a protective gas, such as melon, fruit, food, and light bulb filling gas. Two, the use of nitrogen Nitrogen in metallurgy, chemical industry, light industry, electronics and other departments, as feedstock gas, protective gas, replacement gas and sealing gas. Liquid nitrogen products are also widely used in food frozen, vegetables and fruits preservation. It is also widely used in agriculture and animal husbandry, such as insecticidal grain storage, frozen storage of semen of superior livestock, etc. Is the constituent of proteins in plants and animals. With the progress of science and technology and the development of economy, the application scope of nitrogen is expanding day by day. Take advantage of the inertia of nitrogen Metal thermal processing: bright quenching, bright annealing, carburizing, carbonitriding, soft nitriding and other nitrogen based atmosphere heat treatment of nitrogen source, welding and powder metallurgy burning process protection gas, etc. Metallurgical industry: continuous casting, continuous rolling, steel annealing protective atmosphere, BOF top compound blowing nitrogen steelmaking, steelmaking BOF seal, BF top seal, BF ironmaking pulverized coal injection and other processes. Using cryogenic liquid nitrogen Electronic industry: large-scale integrated circuit, color TV picture tube, TV and recorder components and conductor production process protection, etc. Food preservation: food, fruit (fruit), vegetables and other air conditioning storage and preservation, meat, cheese, mustard, tea and coffee, such as fresh packaging, jam, such as nitrogen oxygenation preservation, various bottles of wine purification and covering, etc. Pharmaceutical industry: Chinese medicine (ginseng) nitrogen filling storage and preservation, western medicine injection nitrogen filling, storage tank and container nitrogen filling oxygen, drug pneumatic transmission of air source, etc. Chemical industry: replacement, cleaning, sealing, leak detection and protection of gas, dry quenching, catalyst regeneration, petroleum fractionation, chemical fiber production, etc. Fertilizer industry: raw material of nitrogen fertilizer. Catalyst protection copy, washing gas, etc. Plastics industry: pneumatic transmission of plastic particles, plastic production and storage oxidation prevention. Rubber industry: rubber packaging and storage, tire production, etc. Glass industry: Protective gas for float glass production process. Petroleum industry: nitrogen filling and purification of storage, containers, catalytic towers and pipelines, pressure leak detection of management systems, etc. Offshore oil development: gas covering of offshore oil platforms, nitrogen injection for oil recovery, tank and container inerting, etc. Lump storage: to prevent cellar, barn and other warehouse combustible dust ignition and explosion, etc. Shipping: oil tanker cleaning gas, etc. Aerospace technology: rocket fuel booster, launch pad replacement gas and safety protection gas, astronaut control gas, space simulation room, aircraft fuel pipeline cleaning gas, etc. Other: paint and coating nitrogen oxygenation to prevent the polymerization of oil drying, oil and natural gas storage tanks and containers nitrogen oxygenation, etc. Using cryogenic liquid nitrogen Hypothermia medicine: surgical hypothermia, cryotherapy, blood refrigeration, drug freezing and cryopatter, etc. Biomedicine: cryopreservation and transportation of precious plants, plant cells, genetic germplasm, etc.
Some industrial applications of nitrogen
In the process of industrial production, toxic and harmful, volatile, flammable and explosive materials need to be protected by inert gases. Nitrogen, as one of the inert gases, has a rich gas source, with a content of 79% in the air, and has been increasingly widely used in production. At present, the single making device is widely used in safety protection gas, replacement gas, nitrogen injection three times oil recovery, coal mine fire prevention and fire fighting, nitrogen based atmosphere heat treatment, anti-corrosion and explosion-proof, electronic industry, integrated circuit, etc. Carbon molecular sieves and zeolite molecular sieves are used more in the field of nitrogen production. The separation of oxygen and nitrogen by molecular sieve is mainly based on the different diffusion rates of the two gases on the surface of molecular sieve. Carbon molecular sieve is a carbon-based adsorbent with some characteristics of activated carbon and molecular sieve. Carbon molecular sieves are composed of very small pores. The smaller diameter gas diffuses faster and enters the solid phase of the molecular sieve, so that the nitrogen enrichment component can be obtained in the gas phase. Molecular sieve nitrogen is air as raw material, with carbon molecular sieve as adsorbent, using the principle of pressure change adsorption, the use of carbon molecular sieve on oxygen and nitrogen selective adsorption and separation of nitrogen and oxygen method, commonly known as PSA nitrogen device. As adsorbent for different gases in the adsorption capacity and adsorption speed, adsorption and other differences, as well as the adsorbent adsorption capacity varies with pressure change, therefore the PSA nitrogen making device can be finished in a pressurized conditions of mixed gas adsorption separation process, reduce pressure desorption adsorption by the impurity components, so as to realize the recycling of gas separation and adsorbent. In some emerging material industry, electronic industry, integrated circuit, beer beverage and other inert gas applications are also constantly expanding new application fields. For example, the new PSA nitrogen production device has been used for inert protection of mobile phone lithium battery production, nitrogen packaging for beer and beverage, nitrogen dehydration and drying in organosilicone production, and nitrogen packaging for snack food instead of air and deoxidizer. The application of nitrogen makes the products of these enterprises in the process technology, product quality has been improved, to win the core competitiveness.
Gas separation equipment: localization is still the top priority
The new normal will be the main theme of the 13th Five-Year Plan period. From the perspective of the various fields of gas separation equipment application, after the 12th five-year development, petroleum, chemical, fertilizer, metallurgy, building materials, machinery and other fields, and photovoltaic industry, electronic industry, production capacity has reached the high level, further improve the possibility of smaller, this will make "much starker choices-and graver consequences-in" during the application of gas separation equipment in these areas is greatly reduced. But at the same time, China's GDP will maintain a growth rate of 6.5% ~ 7%, gas separation equipment industry will still have a certain development. In addition, market-oriented reform and the implementation of "going out" strategy are also expected to further stimulate the vitality of gas separation equipment. At present, the gas separation equipment manufacturing industry has formed the following development ideas: in the "13th Five-Year" period, continue to promote the localization of super large air separation equipment, and realize the localization of supporting key components on the basis of fully mastering the complete set of integration technology. Products to high quality, better performance, technology integration direction development. Substantive progress has been made in the application research of special gases, high purity gases and rare gases. Promote the research of cryogenic engineering and petrochemical related products, especially natural gas and coalbed methane. Establish a large experimental research platform in the field of air separation and low temperature, and carry out research on the mechanism of air separation. It can be seen that localization is still the top priority in the development of gas separation equipment manufacturing industry in the "13th Five Year Plan". Gas separation equipment industry should also accelerate the transformation from traditional manufacturing industry to manufacturing service industry. First, air separation equipment industry as the main body extends to both ends, the upstream focuses on the development of complete engineering service business, the downstream focuses on the development of industrial gas business, to strengthen the application research of industrial gas; Second, "expand the horizontal", while developing complete sets of air separation equipment and key supporting units business, take into account the horizontal development of petrochemical low-temperature related industries and characteristic products with competitive advantages; Third, while maintaining the domestic market share to open up the international market.

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Zhejiang Zhongyi Gas Technology Co., Ltd.

Tel: 0086 0571-63372200    Fax: 0571-61779389

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Address: No. 3, No. 12 Road, Dongzhou Industrial Functional Zone, Fuyang District, Hangzhou

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