Spray gun, spray gun control method and lime kiln with spray gun

A technology of spray gun and telescopic length, which is applied in the field of lime kiln, can solve the problems of high NOx, unfavorable environmental performance of equipment, etc., and achieve the effect of reducing the content of NOx

Active Publication Date: 2020-10-30
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the calcination temperature of the material is as high as 1100°C, the kiln chamber temperature in the calcination section of the lime kiln generally needs to reach 1300°C. In this h

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  • Spray gun, spray gun control method and lime kiln with spray gun
  • Spray gun, spray gun control method and lime kiln with spray gun
  • Spray gun, spray gun control method and lime kiln with spray gun

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Embodiment Construction

[0035] In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings.

[0036] The technical solution of the present application is based on the low NOx combustion theory of fuel staging combustion. The so-called fuel staging combustion means that the fuel is fed into the furnace in stages to form a primary combustion zone with a small fuel concentration and a secondary combustion zone with a large fuel concentration in the combustion zone. . The NOx formed in the primary combustion zone is reduced to N2 under the high temperature and reducing atmosphere of the secondary combustion zone, which can significantly reduce the NOx emission during the combustion process.

[0037] Based on the above fuel staged combustion theory, see image 3, the application provides a spray...

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Abstract

The invention discloses a spray gun, a spray gun control method and a lime kiln with the spray gun. A fixed partition plate arranged in the spray gun divides a vertical pipe of the spray gun into a thin fuel area and a thick fuel area. When the pulverized coal passes through the bent pipe, the pulverized coal concentration in the rich fuel area is high and the pulverized coal concentration in thelight fuel area is low because of the inertia effect; the telescopic positions of the sliding partition plate and the sliding sleeve are adjusted, the fuel pulverized coal concentration difference between the thin fuel area and the thick fuel area is adjusted; a primary combustion area with low pulverized coal concentration and a secondary combustion area with high pulverized coal concentration are naturally formed at an outlet of a spray gun in the lime kiln so that NOx formed by combustion in the primary combustion area can be better reduced into N2 in the secondary combustion area, and thecontent of NOx in the lime production process is reduced.

Description

technical field [0001] The application relates to the technical field of lime kilns, and in particular, to a spray gun, a spray gun control method and a lime kiln with a spray gun. Background technique [0002] Usually we call lime refers to quicklime (CaO), which is an important auxiliary raw material widely used in the metallurgical industry. In the sintering of iron-making raw materials, iron-making reduction process, molten iron pretreatment process and out-of-furnace refining process, lime is used as an additive. It plays the role of adjusting the basicity of the charge, slagging and desulfurization. It can be seen that lime plays an important role in the smooth progress of the iron and steelmaking process. [0003] The lime kiln is the core equipment in the lime production process. The raw limestone is heated to 1100 ℃ in the lime kiln, and then calcined to produce the product lime. In the production process of lime kiln, fuels such as pulverized coal and gas need to ...

Claims

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Application Information

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IPC IPC(8): C04B2/10
CPCC04B2/10Y02P40/40
Inventor 周浩宇刘前
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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