Method for providing oxygen rich gas with stable flow and purity for oxygen rich combustion supporting of kiln

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...

AI Technical Summary

Problems solved by technology

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 rate of the oxygen-enriched air system and the stability of oxygen purity directly determines the effect of the oxygen-enriched combustion-supporting process, so, in a sense, if the stable oxidant supply method cannot be solved, the enrichment of this separation method The application of oxygen combustion system will be severely restricted

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