Cement plant kiln on-site oxygen production and gas supply device and method
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A technology for cement plants and kilns, applied in the field of air separation, can solve the problems of high manufacturing cost, high operating cost and large investment.
Pending Publication Date: 2021-05-18
上海穗杉实业股份有限公司 +1
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[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, ther
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Embodiment 1
[0060] A cement plant, the local altitude is 500m, the output of clinker is 6200TPD, the high-quality coal with a calorific value of ~5900kcal / kg is about 31T / h, the average electricity price is 0.55 yuan / KWH, and the average coal price is 690 yuan / ton. The cost is 30 yuan / ton, and the benefit of each additional ton of clinker production is 100 yuan, and the annual operation time is 300 days;
[0061] Factory normal compressed air consumption ~ 50m 3 / min, mainly for the use of dust removal and blockage removal, the normal operating pressure of the gas point is about 0.6MPa, and the total amount of equipment is about 90m 3 / min, a compressed air unit with a pressure of 0.7MPa, the investment cost is about 1.2 million yuan, and the annual operation and maintenance cost is 120,000 yuan;
[0062] According to the simulation calculation of the oxygen-enriched combustion process, about 7100m of oxygen-enriched air with a purity of 35% is required 3 / h (about 118m 3 / min), design...
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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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