Cement plant kiln on-site oxygen production and gas supply device and method

Abstract

The invention belongs to the technical field of air separation, and particularly relates to a cement plant kiln on-site oxygen production and gas supply device and method. A membrane separation oxygen production technology is organically coupled to an original compressed air gas supply facility, and original compressed air is separated into two kinds of gas, rich nitrogen and rich oxygen; the generated rich nitrogen directly replaces the compressed air demand of an original factory, and compression energy is recycled; the generated rich oxygen can be sent to a furnace kiln to directly completely or partially replace original clean air and coal air to carry out oxygen-enriched combustion, the compression energy of a fan is recycled, and additional economic benefits are obtained due to oxygen-enriched combustion; the extreme condition of compressed air use is fully considered, a standby compressed air compensation loop is adopted for flow compensation, the oxygen supply scheme that oxygen is replaced with compressed air is achieved on the whole, and energy consumption of oxygen extraction is greatly reduced; and the equipment management and maintenance cost is low, potential safety hazards are avoided, and a preferred scheme for oxygen-enriched combustion energy-saving transformation of a cement plant is achieved.

Description

technical field [0001] The invention belongs to the technical field of air separation, and in particular relates to an on-site oxygen production and gas supply device and method for furnaces and kilns in cement plants. Background technique [0002] Oxygen-enriched, widely used in various fuel oil, gas, coal-fired furnaces (glass, cement, ceramics), various boilers, heating furnaces, incinerators, heat medium furnaces, hot blast stoves, smelting furnaces, aero engines, ship engines, etc. Combustion, energy saving and environmental protection; catalytic cracking, desulfurization, wastewater treatment, engine efficiency enhancement, oxygen-enriched gas (coal) production, various oxidation reactions, fermentation and other fields have also applied oxygen-enriched technology to achieve good economic benefits; in addition, oxygen-enriched It is also widely used in medical care, large-scale oxygen-enriched ventilation, plateau oxygen enhancement, aquaculture, etc., involving petroc...

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Problems solved by technology

[0003] The air contains about 21% of oxygen and 78% of nitrogen. In the method of extracting rich oxygen from air, the most widely used methods in industry are cryogenic distillation and pressure swing adsorption, but these two methods Oxygen-enrichment systems constructed have large investment, high energy consumption, complicated technology, special operation is required, and high operating costs; in addition, there are oxygen separation methods such as electrolysis and chemical methods, but because of their water consumption and consumption The use of chemical raw materials to achieve oxygen separation has disadvantages such as difficult acquisition of raw materials, high energy consumption, high manufacturing costs, and high use costs, which are unacceptable to industrial customers and are only used in some special occasions.

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