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Forward film oxygen production process and device and application of forward film oxygen production process and device in oxygen-enriched firing system

A process and oxygen-enriched technology, which is applied in the forward membrane oxygen production process and device and its application in the oxygen-enriched firing system, can solve the problems of huge investment and huge investment energy, and achieve reduced investment and enhanced heat radiation , the effect of reducing exhaust emissions

Pending Publication Date: 2022-04-19
玉溪西美西节能减排服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Taking the cement industry as an example, the existing dry-process cement production line requires at least 20,000-30,000 m 3 The air volume per hour, with the existing oxygen production technology, to achieve full oxygen-enriched combustion, requires huge equipment and a large amount of investment, which is still difficult to achieve, but even if the local oxygen-enriched combustion technology is used in the cement production line, that is, in the cement production line Oxygen-enriched air is added to the coal feeding air at the kiln head and kiln tail, and the combustion effect is enhanced through the full mixing of pulverized coal and oxygen-enriched air. It also requires an oxygen-enriched air volume of about 5000m³ / h, 30-40% concentration, equipment investment, The energy consumed for operation is huge

Method used

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  • Forward film oxygen production process and device and application of forward film oxygen production process and device in oxygen-enriched firing system
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  • Forward film oxygen production process and device and application of forward film oxygen production process and device in oxygen-enriched firing system

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Embodiment 1

[0045] like figure 1 , 2 , 3, and 4, this case is the specific application of the oxygen-enriched technology prepared by the compressed air membrane method in a cement company. Through the oxygen-enriched combustion-supporting transformation of the company's current clinker output of 2800t / d rotary kiln, in order to achieve the technological purpose of increasing production and reducing consumption.

[0046] First of all, the main technical performance parameters of the membrane separator oxygen generator used in this case are as follows:

[0047] Compressed air demand: flow > 7700Nm³ / h, pressure > 0.7MPa, dew point < -15°C

[0048] A total of three sets of membrane separators are put into operation, each of which is skid-mounted as a whole and operated in parallel in groups;

[0049] Oxygen enrichment concentration: 37%~40%;

[0050] Oxygen-enriched flow: 2000~3200Nm 3 / h;

[0051] Nitrogen-enriched gas: 4600Nm 3 / h, purity 90%, pressure > 0.6MPa (gauge pressure), at...

Embodiment 2

[0069] A cement production line in a cement factory currently has a clinker output of 5,600 tons / day, and 34.5 tons / hour of coal with a calorific value of about 5,600 kcal / Kg; it currently has 3 compressed air stations with a total of 10 air compressors Compressor, can provide 1.0Mpa compressed air monthly 300m³ / min. It is required to increase the production by 5% after the oxygen-enriched technology is prepared by the compressed air membrane method, or reduce the fuel coal consumption by more than 5%, and the condition of the kiln will not be affected after switching to low-quality coal.

[0070] According to the demand, combined with the actual operation and overall situation of the kiln, it is planned to make full use of the original equipment of the cement plant for dust removal and blockage removal. The pressure is ~0.7MPa. After being "filtered" by the membrane separation system, two gases can be produced:

[0071] One is 30~40% oxygen-enriched air; it can be directly se...

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Abstract

The invention provides a forward membrane oxygen production process and device and specific application of the forward membrane oxygen production process and device in an oxygen-enriched firing system, relates to the technical field of combustion equipment and combustion methods of kilns, furnaces and the like, and mainly aims to solve a series of problems of high equipment investment, difficulty in operation management, high use cost and the like when an existing oxygen-enriched combustion technology is applied to the firing system. By adopting the membrane separation oxygen production technology, the purpose of replacing oxygen with compressed air is achieved, the generated oxygen-enriched air participates in firing, an on-site compressed air system can be fully utilized, the oxygen-enriched air can be prepared at low cost, the influence on the air pressure of the nitrogen-enriched air is small, the safety is improved, all functions of original compressed air can be achieved, and the production efficiency is improved. In addition, the use safety is greatly improved, and meanwhile, the mode is short in construction period and low in equipment management and maintenance cost; and rich oxygen is used for participating in combustion, so that emission of combustion air and waste gas is reduced, heat energy loss is reduced, and corresponding investment for waste gas treatment is reduced.

Description

technical field [0001] The invention relates to the technical field of combustion equipment and combustion methods for kilns, furnaces, etc., and in particular to a forward membrane oxygen production process and device and its application in an oxygen-enriched firing system. Background technique [0002] Oxygen-enriched combustion is a technology that uses gas with a higher oxygen content than natural air in firing systems such as boilers and kilns. Oxygen-enriched combustion is used for all industrial boilers and kiln fuels (including gas, liquid and solid), which can not only improve the application range of inferior fuels, but also give full play to the performance of high-quality fuels. The membrane oxygen enrichment technology is a new separation method gradually developed since the late 1970s. It uses the difference in the selective permeability of organic polymer dense films to nitrogen and oxygen. When there is a pressure difference or pressure ratio on both sides of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D7/02F23L7/00C01B13/02
CPCF27D7/02F23L7/007C01B13/0251C01B2210/0028C01B2210/0046C01B2210/0062
Inventor 李峰陈铭瑞子陈亮
Owner 玉溪西美西节能减排服务有限责任公司
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