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Low-NOx cleaning combustion type lime production method and device and control method thereof

A production device and clean technology, applied in the direction of combustion method, combustion type, control combustion, etc., can solve the problems of reducing NOx content and high NOx emissions

Pending Publication Date: 2019-02-19
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The lime production method and production device can control the combustion process at the source of NOx generation to reduce the NOx content, which solves the problem of excessive NOx emissions in the lime production process and various shortcomings in the subsequent denitrification process

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  • Low-NOx cleaning combustion type lime production method and device and control method thereof
  • Low-NOx cleaning combustion type lime production method and device and control method thereof
  • Low-NOx cleaning combustion type lime production method and device and control method thereof

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Embodiment Construction

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] In this article, terms such as "upper, lower, inner, outer" are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may also change accordingly depending on the drawings. It is understood as an absolute limitation on the scope of protection; moreover, relative terms such as "first" and "second" are only used to distinguish one from another component with the same name, and do not necessarily require or No such actual relationship or order between these components is implied.

[0048] The main component of limestone is CaO, which will combine with SOx to form CaSOx during the calcination process, that is, calcium desulfurization, so the whole lime kiln is equiva...

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Abstract

The invention discloses a low-NOx cleaning combustion type lime production method and device and a control method thereof. The production method comprises the following steps: dividing combustion airrequired for calcining quicklime into primary air, secondary combustion air and over firing air; feeding the primary air from the upstream portion of a main fuel feeding portion, enabling a region which corresponds to the main fuel feeding portion to become a main combustion region for calcining the quicklime; feeding the secondary combustion air into a region which corresponds to a secondary combustion fuel feeding portion to form a secondary combustion region which is positioned at the downstream of the main combustion region; feeding the over firing air from the downstream of the secondarycombustion fuel feeding portion, forming an over firing region at the downstream of the secondary combustion region, and meanwhile changing single-position one-time spraying of fuel into up-down double-position multiple-time spraying of the fuel so as to further strengthen fuel grades. Through the lime production method, the production device and the control method, by deviation of an air-fuel ratio equivalent weight, a combustion process can be controlled on a NOx generation source to reduce NOx content, and the problem of over-high NOx emission amount in a lime production process is solved.

Description

technical field [0001] The invention relates to lime production equipment in the metallurgical and chemical industry, in particular to a clean burning lime production method and a production device with low NOx emission concentration. The invention also relates to a control method of the lime production plant. Background technique [0002] In the metallurgical and chemical industry, the so-called lime generally refers to quicklime (CaO), which is made of limestone (main component CaCO 3 ) is calcined at 950°C to 1100°C in a lime kiln to release CO 2 generated after. Lime is an important auxiliary raw material in the metallurgical industry. In the sintering of ironmaking raw materials, ironmaking reduction process, molten iron pretreatment process and external refining process, lime is used as an additive to dephosphorize and desulfurize. The influence on the properties of steel is very important. [0003] Please refer to figure 1 , figure 1 It is a schematic structural...

Claims

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Application Information

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IPC IPC(8): C04B2/12F23N1/02F23C7/02
CPCC04B2/12F23C7/02F23C2201/20F23N1/02F23N2900/05003F23N2237/04F23N2237/16
Inventor 周浩宇
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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