Language

Products

Home

market demand

Oxygen-enriched combustion is a high-efficiency enhanced combustion technology using oxygen-enriched air with an oxygen volume content of more than 21% as a combustion-supporting gas. Oxygen-enriched combustion can significantly improve combustion efficiency and flame temperature, reduce the ignition point of fuel, accelerate the combustion reaction speed, and then save primary energy; oxygen-enriched combustion can promote complete combustion, reduce the amount of flue gas after combustion, improve heat utilization, and reduce excess Air coefficient, reduce the generation of harmful substances, is conducive to carbon dioxide capture. With the progress of combustion technology and the reduction of oxygen cost, oxygen-enriched combustion technology has been more and more widely used in iron and steel smelting, non-ferrous smelting, industrial furnace, thermal engineering, environmental protection and other fields.

Technical features

Significant energy saving effect

Pressure swing adsorption oxygen-enriched combustion can greatly improve the combustion thermal efficiency and has remarkable energy-saving effect. For example, in the glass industry, the average natural gas usage can be saved by 20%-40%. In the blast furnace smelting process, for every 1% increase in oxygen enrichment rate, the combustion temperature can be increased by 40-50 degrees Celsius, the coal injection ratio can be increased by 20-30 kg/t, the calorific value of gas can be increased by 3.4, and the molten iron can be increased by about 4%.

Wide range of applications

Pressure swing adsorption oxygen and oxygen-enriched combustion technology has a wide range of applications. It has been successfully applied in blast furnace ironmaking, electric furnace steelmaking, steel rolling heating furnace, copper smelting, lead and zinc smelting, nickel smelting, recycled lead smelting, recycled copper smelting, glass fiber kiln, glass kiln, cement kiln, rotary kiln, gas furnace, boiler, hot blast furnace and other fields.

Low cost of oxygen

In the oxygen-enriched combustion technology, the preparation cost of oxygen has an important impact on the economy of the whole project. Take a 5000Nm/h oxygen device as an example, if the oxygen cost per Nm can save 0.2 yuan, it can save 1000 yuan per hour, and 8.76 million yuan can be saved at an annual operating rate of 100. Among the three oxygen preparation methods, the oxygen cost of pressure swing adsorption is the lowest, about 0.3kwh/Nm³.

Simple operation and convenient adjustment

The pressure swing adsorption oxygen generation technology has a high degree of automation, simple operation, and can realize unattended operation. At the same time, the load adjustment is very convenient, and a single set of units can realize 50% ~ 100 real-time adjustment. It is very suitable for adjusting the oxygen volume according to the order or production plan, so as to obtain better economic benefits.

Application areas

Waste incineration

The application principle of oxygen-enriched combustion in waste incineration is to enrich the oxygen in the air to make the oxygen content reach 25%-30%, and send the oxygen-enriched gas into the incinerator in the form of secondary air, which can increase the overall or local oxygen content in the furnace and reduce the overall air excess coefficient in the furnace. At the same time, the increase of oxygen enrichment can improve the conditions of ignition, so that the combustion is complete, the ash is melted, and the volume is reduced to nearly zero, thus ensuring the complete decomposition and combustion of toxic organic gases such as dioxins at high temperatures. Therefore, the use of oxygen-enriched combustion technology in the field of waste incineration not only saves energy and reduces consumption, but also has significant environmental benefits.

Cement kiln

Oxyfuel technology is considered to be the most economical technical solution for the cement industry to achieve effective carbon capture. The process route is as follows: oxygen-enriched and high-concentration CO² flue gas circulating in the system is mixed as combustion-supporting air to fully burn the fuel and obtain flue gas with CO² concentration exceeding 75% at the outlet of the preheater. Subsequently, pressure swing adsorption technology is adopted to capture and purify carbon dioxide. The carbon dioxide can be used for mineralization, maintenance, modification of materials, capture and storage. Oxyfuel combustion technology based on carbon emission reduction target has great market application potential in cement production process.

Nonferrous Smelting/Recycled Metal Smelting

The use of oxygen-enriched air instead of ordinary air in the non-ferrous metal smelting process is a major technical measure to strengthen production, reduce energy consumption and increase economic benefits. Pressure swing adsorption oxygen generation technology can provide a stable and reliable source of oxygen for copper, lead, nickel, zinc, tin, gold and other non-ferrous metals smelting, promote the energy-saving optimization of oxygen-enriched combustion-supporting process, provide users with multiple pressure swing adsorption oxygen generation devices with "adjustable gear", and greatly reduce the cost of oxygen consumption. The supporting furnace types include bottom blowing furnace, side blowing furnace, top blowing furnace, etc. More than 40 sets of VPSA oxygen generating units have been built for the non-ferrous metallurgical industry.

New energy industry

The application of oxygen-enriched combustion technology in the field of new energy includes three aspects: first, it is used for smelting high-iced nickel in an oxygen-enriched side-blowing furnace of laterite nickel ore. The process has the advantages of low cost, flexible control of ferronickel grade, high heat utilization rate and low fuel requirement. Second, it is used in the calcination process of high nickel ternary cathode material, which can stably provide oxygen with purity above 93%, and has fast start-stop and adaptive load adjustment functions, reduce the emission and effectively reduce the production cost, and the third is to use oxygen products as a protective gas in the production process of lithium battery pole pieces.

Glass Furnace/Glass Fiber Kiln Furnace

Oxygen-enriched combustion technology is an effective measure for energy saving and consumption reduction of glass/glass fiber kiln. With the gradual reduction of oxygen production cost, oxygen-enriched/full oxygen combustion technology composed of oxygen fuel gradually replaces the regular combustion mode composed of air and fuel in glass furnace. VPSA oxygen generation technology can provide stable and reliable oxygen supply for the total oxygen (oxygen-enriched) combustion section of glass/glass fiber kiln. Considering the high requirements of the kiln for the stability and continuity of oxygen supply, it can provide cooperation modes such as equipment rental or operation and maintenance services for industrial kiln users to ensure the safety and stability of users' oxygen use.

Oxygen enrichment of blast furnace

In the long-process steel enterprises, more and more steel enterprises choose pressure swing adsorption oxygen generation to provide oxygen enrichment for blast furnaces. First, because the oxygen required for ironmaking is rich oxygen instead of pure oxygen, pressure swing adsorption and air can meet the requirements after mixing. We have mature pressure swing adsorption oxygen generation technology, unique structure and process of pre-machine oxygen mixing system, has been more than 50 iron and steel enterprises to configure pressure swing adsorption oxygen generation equipment and pre-machine oxygen enrichment overall solution.

SUZHOU DOER OXYGEN

EQUIPMENT CO.,LTD
Address: Room 323, Building 3, Yangtze River Delta International R & D Community Start-up Area, 286 Qinglonggang Road, High-speed Railway New Town, Xiangcheng District, Suzhou City

E-mail: boren@doercryo.com

Phone number:17706256431

Business License

Powerdy By：300.cn