Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A co-based 2 Enriched parallel flow regenerative lime kiln production process

A production process, regenerative technology, applied in lime production, chemical instruments and methods, inorganic chemistry, etc., to achieve the effect of increasing product added value and eliminating circulation

Active Publication Date: 2017-01-18
NORTHEASTERN UNIV LIAONING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the existing process, the present invention provides a CO-based 2 Enriched parallel flow regenerative lime kiln production process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A co-based <sub>2</sub> Enriched parallel flow regenerative lime kiln production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, based on CO 2 The structure of enriched parallel flow regenerative lime kiln system is as follows: figure 1 As shown, the dust removal device used in the system is a bag filter, and the fuel is pulverized coal. The dust concentration of the flue gas discharged from the exhaust port is ≤50mg / Nm 3 .

[0025] The above parallel flow regenerative lime kiln system is used to produce quicklime (CaO). The daily output of quicklime is 450 tons, 80 production cycles per day, the amount of pulverized coal per production cycle is 240 kg~270kg, and the excess coefficient of combustion air is 1.1~1.4.

[0026] CO-based 2 The enriched parallel flow regenerative lime kiln production process method comprises the following steps:

[0027] (1) In the first combustion cycle, the limestone raw material is transported from the stone silo in front of the kiln to the weighing hopper, and the limestone raw material is weighed by the weighing hopper and then loaded into the...

Embodiment 2

[0040] In this example, based on CO 2 The structure of enriched parallel flow regenerative lime kiln system is as follows: figure 1 As shown, the dust removal device used in the system is a bag filter, and the fuel is pulverized coal. The dust concentration of the flue gas discharged from the exhaust port is ≤50mg / Nm 3 .

[0041] The above parallel flow regenerative lime kiln system is used to produce quicklime (CaO). The daily output of quicklime is 500 tons, 80 production cycles per day, the amount of pulverized coal per production cycle is 265kg~300kg, and the excess coefficient of combustion air is 1.1~1.4.

[0042]CO-based 2 The enriched parallel flow regenerative lime kiln production process method comprises the following steps:

[0043] (1) In the first combustion cycle, the limestone raw material is transported from the stone silo in front of the kiln to the weighing hopper, and the limestone raw material is weighed by the weighing hopper and then loaded into the f...

Embodiment 3

[0055] In this example, based on CO 2 The structure of enriched parallel flow regenerative lime kiln system is as follows: figure 1 As shown, the dust removal device used in the system is a bag filter, and the fuel is pulverized coal. The dust concentration of the flue gas discharged from the exhaust port is ≤50mg / Nm 3 .

[0056] The above parallel flow regenerative lime kiln system is used to produce quicklime (CaO). The daily output of quicklime is 550 tons, 80 production cycles per day, the amount of pulverized coal per production cycle is 290 kg ~ 330 kg, and the excess coefficient of combustion air is 1.1 ~ 1.4.

[0057] CO-based 2 The enriched parallel flow regenerative lime kiln production process method comprises the following steps:

[0058] (1) In the first combustion cycle, the limestone raw material is transported from the stone silo in front of the kiln to the weighing hopper, and the limestone raw material is weighed by the weighing hopper and then loaded int...

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 production process method for a parallel-flow regenerative lime kiln based on CO2 enrichment, including: feeding limestone raw materials into two kiln chambers of a parallel-flow regenerative lime kiln; spraying carrier gas into the kiln chamber; Gas is supplied; in the current combustion zone of the kiln chamber, the limestone absorbs the heat generated by fuel combustion and decomposes to generate quicklime and CO2 gas; the quicklime is cooled to 80℃~100℃ and then discharged; the cooling gas decomposes with the limestone to generate CO2 gas and fuel The CO2 gas generated by combustion is mixed into another kiln chamber to preheat the limestone; the flue gas generated by the preheating releases heat to the limestone and then the temperature is lowered and discharged, producing CO2 gas with a volume concentration greater than 95%; Parallel flow regenerative lime The kiln starts reversing work. The invention prepares high-quality lime and also obtains high-purity CO2 gas. Compared with the existing process method, the circulation of N2 in the system is eliminated, the energy used to heat N2 is saved, and the flue gas is recycled to achieve the goals of increasing product added value and energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a lime kiln production process, in particular to a CO-based 2 Enriched parallel flow regenerative lime kiln production process. Background technique [0002] In the metallurgical industry, a large amount of CO is produced when the slagging material quicklime is produced 2 . In actual production, the production of 1 ton of quicklime produces more than 1 ton of CO 2 , and about 70 kg of quicklime is needed to smelt 1 ton of steel. In 2014, China's crude steel output was about 820 million tons, and about 57 million tons of quicklime was needed, which produced more than 60 million tons of CO 2 . At present, lime kilns are mostly used to produce quicklime, but CO in the exhaust gas from lime kilns 2 The content is very low, if the CO 2 Enrichment recycling still needs to spend a large part of energy and capital, so most enterprises choose to discharge directly, which has caused a very serious environmental problem. [0003] ...

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): C04B2/10C01B31/20C01B32/50
CPCY02P40/40
Inventor 李宝宽荣文杰王强李林敏孙美佳童岩鹏李一明齐凤升王芳
Owner NORTHEASTERN UNIV LIAONING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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