Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for roasting active lime with mixed gas in sleeve lime kiln

A technology of sleeve lime kiln and mixed gas is applied in the field of sleeve lime kiln, and the sleeve lime kiln uses mixed gas to roast active lime, and achieves the effect of saving gas consumption, good effect and reliable process design.

Inactive Publication Date: 2017-04-19
SHANDONG IRON & STEEL CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, there is a contradiction with the fact that the gas is mixed first and then enters the upper and lower combustion chambers for combustion.

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of sleeve lime kiln of this embodiment uses the method for roasting active lime with mixed gas, comprises the following steps:

[0024] ①. The combustion system of the sleeve lime kiln is equipped with an upper combustion chamber and a lower combustion chamber, and the gas consumption of the lower combustion chamber is controlled to be more than twice the gas consumption of the upper combustion chamber;

[0025] ②. The gas with different calorific values ​​is fed through the two gas ring pipes outside the sleeve lime kiln respectively. The upper row of burners set in the upper combustion chamber is fed into the blast furnace gas, and the lower row of burners set in the lower combustion chamber is fed into the coke oven. gas;

[0026] ③. Control the excess coefficient of air supplied to the upper row of burners in the range of 1.55, so that the combustion flue gas reaches the temperature range of 1050-1100 °C required for limestone decomposition;

[0027] ④. The ...

Embodiment 2

[0032] The difference between this embodiment and Embodiment 1 is that less air is introduced into the upper combustion chamber to achieve a greater air excess coefficient, and the air excess coefficient supplied to the upper row of burners is controlled at 1.5, so that lime can be continuously provided The heat from the decomposition of the outer layer has better production efficiency.

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
Login to View More

PUM

No PUM Login to View More

Abstract

A method for calcining active lime by the use of mixed gas in a lime sleeve kiln comprises the following steps: different consumption amounts of gas is respectively introduced into upper and lower combustion chambers of a combustion system of the lime sleeve kiln; blast-furnace gas is blown into the upper combustion chamber to keep oxygen free combustion and make combusted gas reach the temperature range of 1000-1100 DEG C required by limestone decomposition; and coke oven gas is blown into lower nozzles of the lower combustion chamber, the lower nozzles are multi-row structural layered combustors, a part of fuel in the layered combustors undergoes premixed combustion at a normal air-fuel ratio, high temperature generated by combustion makes an area where the air nearby is relatively thin satisfy ignition conditions and thereby ignition is carried out layer by layer, the combustion status of flameless oxidation is formed by combining recirculation flow of flue gas, and temperature is controlled within the range of 1150-1200 DEG C. According to the method, there is no need to build a gas mixing and pressuring station, and the purposes of accurately controlling lime calcination temperature, guaranteeing heat balance and reducing production costs of lime can be achieved.

Description

technical field [0001] The invention relates to a sleeve lime kiln, which belongs to the technical field of lime calcination, in particular to a method for roasting active lime using mixed gas in a sleeve lime kiln. Background technique [0002] At present, the domestic sleeve lime kiln has been widely used in the metallurgy and chemical industry, which has brought great economic effects due to its advantages of high efficiency, energy saving and environmental protection. The calcination process of the sleeve lime kiln uses combustible gas as fuel and high temperature calcination Lime production. Exhaust gas preheating is used to drive the wind, and the high-temperature and high-pressure driving wind sprays to trigger the circulating air circulation to realize the recycling of heat and reduce the heat consumption of lime production, so as to achieve the purpose of energy saving and consumption reduction. [0003] Coke oven gas or blast furnace gas or coke oven gas and conve...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10
CPCY02P40/40
Inventor 贾法强陈江林曲思民刘昌霞
Owner SHANDONG IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com