Smoke desulfurizing process by circulation fluid state dry method of layered feed back

A technology of dry flue gas desulfurization and circulating flow, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. The dust removal effect of the dust removal system and other problems can be achieved to improve the utilization rate and desulfurization efficiency, increase the residence reaction time, and improve the desulfurization reaction efficiency.
CN1491739AActive Publication Date: 2004-04-28WUHAN KAIDI ELECTRIC POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUHAN KAIDI ELECTRIC POWER CO LTD
Publication Date
2004-04-28

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Abstract

The present invention relates to external grain re-circulating technology in large circular fluidizing dry fume desulfurizing system. The desulfurizing process includes preparing desulfurizing agent, desulfurizing reaction inside the desulfurizing reaction tower and external desulfurizing agent grain separation and re-circulation. In the external grain re-circulation, the returned material is two-stage separated and re-circulated, the grains separated by the first stage and the second stage desulfurizing agent grain separator are fed to the fluidizing region in the lower part of the desulfurizing reaction tower separately through different re-circulation inlets, resulting in raised desulfurizing agent grain utilization and desulfurizing reaction efficiency. Compared with available technology, the present invention has much higher fume dedusting efficiency, high desulfurizing efficiency up to 92 % at Ca / S of 1.1-1.3, less adhesion and blocking in the lower desulfurizing tower part and lowered load of the desulfurizing agent grain separator.
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Description

technical field

[0001] The invention belongs to the technical field of flue gas desulfurization, relates to dry desulfurization of flue gas exhausted by various combustion equipment, and specifically refers to a circulating fluidized dry flue gas desulfurization process using layered recycling. Background technique

[0002] The control of sulfur dioxide gas pollution in the flue gas exhausted by combustion equipment has always been the focus of environmental protection in most countries in the world. It is imperative. For the treatment of sulfur dioxide in flue gas, foreign countries usually use wet lime gypsum method (W-FGD) to desulfurize. A series of problems such as large size, complex structure, and the need to retreat water. Therefore, dry or semi-dry flue gas desulfurization technology has become the focus of research and development at home and abroad. For dry or semi-dry flue gas desulfurization technology, the main factors affecting desu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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