Low NOx clean combustion type lime production method and device as well as control method of low NOx clean combustion type lime production device

A production device, clean technology, applied in the direction of furnace control device, charging treatment type, lighting and heating equipment, etc., can solve the problems of reducing NOx content and high NOx emission

Inactive Publication Date: 2019-01-01
ZHONGYE-CHANGTIAN INT ENG CO LTD
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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, whi

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  • Low NOx clean combustion type lime production method and device as well as control method of low NOx clean combustion type lime production device
  • Low NOx clean combustion type lime production method and device as well as control method of low NOx clean combustion type lime production device
  • Low NOx clean combustion type lime production method and device as well as control method of low NOx clean combustion type lime production device

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Embodiment Construction

[0044] 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.

[0045] 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.

[0046] 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 clean combustion type lime production method and a device as well as a control method of the low NOx clean combustion type lime production device. The production method comprises the following steps that combustion-supporting wind required for calcining quicklime is divided into primary air and over fire air, and the primary air is input from the upstream of a fuel input portion to enable a region, corresponding to the fuel input portion, to form a main combustion region for calcining the quicklime; and the over fire air is input from the downstream of the fuel input portion to form a secondary combustion region for calcining the quicklime at the downstream of the main combustion region. For the lime production method and device as well as the control method, through deviation of air-fuel ratio equivalence, combination process control from NOx production sources can be performed to lower the content of NOx, and the problem of too high NOx emission in the lime production process and various disadvantages caused by adopting a subsequent denitration technology are 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 for lime production using 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...

Claims

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Application Information

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IPC IPC(8): C04B2/12F27D7/02F27D19/00
CPCC04B2/12F27D7/02F27D19/00F27D2007/023F27D2019/0015F27D2019/0043F27D2019/0046F27M2003/03
Inventor 周浩宇王赛辉
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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