Method for providing oxygen rich gas with stable flow and purity for oxygen rich combustion supporting of kiln
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An oxygen-enriched combustion-supporting, stable flow technology, which is applied in the transportation of non-flammable liquid/gas, combustion methods, oxygen preparation, etc., can solve the problems of oxygen-enriched air flow rate, oxygen purity fluctuation, application constraints of oxygen-enriched combustion-supporting system, etc.
Active Publication Date: 2012-06-20
上海穗杉实业股份有限公司
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Therefore, the membrane separation system that provides oxygen for oxygen-enriched combustion in the kiln will cause huge fluctuations in the flow rate and oxygen purity of the separated oxygen-enriched air due to changes in the temperature of the separated air in different locations and seasons
Since membrane separation provides the flow r
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Embodiment 1
[0055] A system that uses Oxylead? plate membrane separator to provide oxidant for oxygen-enriched combustion of cement rotary kiln. The designed plate membrane separator is a single-component oxygen-enriched flow rate of 5000Nm 3 / hr, Oxylead® plate membrane separator is produced by Shanghai Haoshan Industrial Co., Ltd., and can be obtained from the market. The oxygen and nitrogen separation membrane material used in the separator has a separation coefficient of 2.05 and an oxygen permeability of 5.068 at 25°C. N m 3 / hr bar m 2 , the nitrogen permeation rate is 2.479 Nm3 / hr bar m 2 , 5000Nm 3 / hr, a total of 1381 m 2 Membrane material, a set of 21352.9 Nm at 25°C was selected for the design of this case 3 / hr pumping speed vacuum pump, achieved 29.94% purity of oxygen-enriched 4974 Nm at 20°C 3 / hr, to meet the design requirements:
[0056] Design ambient temperature 20.0 ℃ environment humidity 70.0% Operating altitude 100.0 m operating...
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Abstract
The invention belongs to the technical field of air separation, and in particular discloses a method for providing an oxygen rich gas with stable flow and purity for oxygen rich combustion supporting of a. kiln. Conventional membrane separation devices are improved, namely membrane separators are grouped; and a control valve capable of isolating at least one part of membrane area and a set of heat exchanger for compensating the temperature of the inlet gas are installed. By the method, the change or the fluctuation of the flow or the oxygen purity of the oxygen rich air due to the change of the environmental temperature is eliminated or lightened to a range of meeting the oxygen rich combustion supporting requirement; when the running environmental temperature is low, an inlet gas temperature compensation measure is adopted; and when the running environmental temperature is high, stable temperature and flow of raw gas are realized by regulating the flow and isolating a part of membrane area, and the stability of the flow and the purity of the oxygen rich air at the outlet of a separation system is finally ensured. By adopting the simple isolating measure and the method for fully reclaiming the heat energy of the waste gas, the stability of the system is enhanced, and the total efficiency of the system is improved.
Description
technical field [0001] The invention belongs to the technical field of air separation, and in particular relates to a method for providing oxygen-enriched gas (oxidant) for oxygen-enriched combustion of furnaces and kilns by adopting membrane method oxygen-enrichment technology. Background technique [0002] Oxygen-enriched, has been 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 Combustion-supporting energy-saving and environmental protection fields; catalytic cracking, desulfurization, wastewater treatment, engine efficiency enhancement, oxygen-enriched gas (coal) production, various oxidation reactions, fermentation and other fields also apply oxygen-enriched technology, and have achieved good economic benefits; In addition, oxygen enrichment is also widely used in medical care, large-scale oxygen enri...
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