CN1931766A - Low heat value gas oxygen-enriched burning process in rotary lime kiln - Google Patents
Low heat value gas oxygen-enriched burning process in rotary lime kiln Download PDFInfo
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- CN1931766A CN1931766A CN 200610047911 CN200610047911A CN1931766A CN 1931766 A CN1931766 A CN 1931766A CN 200610047911 CN200610047911 CN 200610047911 CN 200610047911 A CN200610047911 A CN 200610047911A CN 1931766 A CN1931766 A CN 1931766A
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- Prior art keywords
- oxygen
- kiln
- air
- heat value
- burning
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000001301 oxygen Substances 0.000 title claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 43
- 239000007789 gas Substances 0.000 title claims abstract description 34
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 29
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 29
- 239000004571 lime Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 239000003034 coal gas Substances 0.000 claims description 5
- 238000001354 calcination Methods 0.000 abstract description 10
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000000571 coke Substances 0.000 abstract description 2
- 235000019738 Limestone Nutrition 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000006028 limestone Substances 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
Abstract
The oxygen-enriched low heat value gas burning process in rotary lime kiln includes adopting low heat value gas of (1700-2000)x4.18 kJ/cu m, such as converter gas and coke oven gas, burning in oxygen-enriched air of oxygen content 23-25 % to reach over 100 deg.c higher calcining temperature, compressing oxygen in a compressor and blending oxygen into the comburant air for burning, and increasing the oxygen content to reinforce burning, concentrate high temperature area and speed the decomposition of limestone.
Description
Technical field
The present invention relates to a kind of lime rotary kiln combustion technology, especially relate to low heat value gas oxygen-enriched burning process in rotary lime kiln.
Background technology
Because Iron and Steel Enterprises in China a large amount of low-heat value gas more than needed, and along with the raising of fuel price and the restriction of national STRENGTH ON COKE output, the coke-oven gas amount also has been subjected to certain influence, the usage quantity of civilian coke-oven gas all is difficult to guarantee, also have the fuel used oil of also taking of part enterprise to change coke-oven gas, cause high heating value gas famine as the coke-oven gas, and a large amount of low-heat value gas such as coal gas of converter, blast furnace gases etc. are but superfluous relatively.Because aspect such as calorific value, these low-heat value gas be at the lime calcining kiln, when especially on rotary kiln, using,, thereby the quality and the output of lime have been influenced because calcining temperature can not satisfy processing requirement fully.
Summary of the invention
In order to have overcome the defective that prior art exists, the purpose of this invention is to provide a kind of under the prerequisite that guarantees lime quality and output, low heat value gas oxygen-enriched burning process in rotary lime kiln.The existing various low-heat value gas fuel of these technology utilization industrial enterprise adopt auxiliary oxygen enrichment measure, by improving the oxygen level in the lime rotary kiln combustion air, reduce the products of combustion amount, thereby reach the purpose that improves temperature of combustion.
The present invention is achieved through the following technical solutions:
A kind of low heat value gas oxygen-enriched burning process in rotary lime kiln, its technological process is: the Wingdale of release mesh is sent into preheater top feed bin by rotary conveyor, expect that by slipping pipe is distributed to Wingdale in the shaft preheater then, Wingdale enters preheater and sends in the rotary kiln after the kiln exit gas preheating, decompose the generation lime product through coal gas roasting under the condition of high temperature in kiln, it is characterized in that: roasting lime employing calorific value is (1700～2000) * 4.18kJ/m in rotary kiln
N 3Low-heat value gas, and in combustion air, increase oxygen content, make that oxygen level is 25～23% in the combustion air.
Described low heat value gas oxygen-enriched burning process in rotary lime kiln, it is characterized in that: described oxygen is after the press pressurization, 50～100% of its total amount is delivered in the pipeline of primary air fan air outlet with air behind thorough mixing in airduct road, deliver to burner and participate in burning; Remaining oxygen deliver in the pipeline of overfire air fan air outlet with air behind thorough mixing in the secondary air pipeline, deliver to and participate in burning in the kiln.
The present invention utilizes the existing various low-heat value gas fuel of industrial enterprise (as blast furnace gas, coal gas of converter, iron-smelting furnace coal gas, producer gas and mixed gas etc.), adopt auxiliary oxygen enrichment measure, increase oxygen level in wind, make that oxygen level is 32.5～46.3% in wind, thereby make stove internal high temperature regional centralized, accelerate the decomposition rate of Wingdale, this technology calcining temperature is than not taking the oxygen enrichment measure can improve more than 100 ℃.Technology of the present invention can make full use of the such low-cost resource of low-heat value gas, minimizing is to the pollution of environment, help implementation of sustainable development, tally with the national condition, factory situation, benefit the nation and the people, having far-reaching economic and social benefit, is lime burner furnace developing direction from now on, has vast potential for future development.
Embodiment
Embodiment 1:
Certain Lime Factory utilizes 600t/d calcined by rotary kiln lime, and the use calorific value is 1747.5 * 4.18kJ/m
N 3Low-heat value gas, and in combustion air, increase oxygen content, make that oxygen level is 23.4% in the combustion air.Combustion air is divided into wind and secondary air, and one time wind participates in rapid combustion, keeps flame profile; Secondary air is mainly used in cool lime, self is heated the back and participates in burning.Required 900m
N 3/ h purity oxygen is after the press pressurization, 70% of its total amount is delivered to injection air on the pipeline of primary air fan air outlet, oxygen and air are in airduct road behind the thorough mixing, deliver to burner and participate in burning, so just increased oxygen level in wind, make that oxygen level is 33.1% in wind, thereby high-temperature area is concentrated, accelerated the decomposition rate of Wingdale; All the other oxygen of 30% deliver in the pipeline of overfire air fan air outlet with air behind thorough mixing in the secondary air pipeline, deliver to and participate in burning in the kiln, calcining temperature is brought up to more than 1350 ℃ like this, has satisfied the requirement of rotary kiln to the lime calcining temperature.
Embodiment 2:
Certain Lime Factory utilizes 600t/d calcined by rotary kiln lime, and the use calorific value is 1800 * 4.18kJ/m
N 3Low-heat value gas, and in combustion air, increase oxygen content, make that oxygen level is 23.2% in the combustion air.Required 800m
N 3The purity oxygen of/h after press pressurization, 80% of its total amount is delivered in the pipeline of primary air fan air outlet with air behind thorough mixing in airduct road, deliver to burner and participate in burning; All the other oxygen of 20% deliver in the pipeline of overfire air fan air outlet with air behind thorough mixing in the secondary air pipeline, deliver to and participate in burning in the kiln, calcining temperature is brought up to more than 1350 ℃ like this, has satisfied the requirement of rotary kiln to the lime calcining temperature.
Embodiment 3:
Certain Lime Factory utilizes 600t/d calcined by rotary kiln lime, and the use calorific value is 2000 * 4.18kJ/m
N 3Low-heat value gas, and in combustion air, increase oxygen content, make that oxygen level is 23% in the combustion air.Required 750m
N 3The purity oxygen of/h after press pressurization, 90% of its total amount is delivered in the pipeline of primary air fan air outlet with air behind thorough mixing in airduct road, deliver to burner and participate in burning; All the other oxygen of 10% deliver in the pipeline of overfire air fan air outlet with air behind thorough mixing in the secondary air pipeline, deliver to and participate in burning in the kiln, calcining temperature is brought up to more than 1350 ℃ like this, has satisfied the requirement of rotary kiln to the lime calcining temperature.
Claims (2)
1, a kind of low heat value gas oxygen-enriched burning process in rotary lime kiln, its technological process is: the Wingdale of release mesh is sent into preheater top feed bin by rotary conveyor, expect that by slipping pipe is distributed to Wingdale in the shaft preheater then, Wingdale enters preheater and sends in the rotary kiln after the kiln exit gas preheating, decompose the generation lime product through coal gas roasting under the condition of high temperature in kiln, it is characterized in that: roasting lime employing calorific value is (1700～2000) * 4.18kJ/m in rotary kiln
N 3Low-heat value gas, and in combustion air, increase oxygen content, make that oxygen level is 25～23% in the combustion air.
2, low heat value gas oxygen-enriched burning process in rotary lime kiln according to claim 1, it is characterized in that: described oxygen is after the press pressurization, 50～100% of its total amount is delivered in the pipeline of primary air fan air outlet with air behind thorough mixing in airduct road, deliver to burner and participate in burning; Remaining oxygen deliver in the pipeline of overfire air fan air outlet with air behind thorough mixing in the secondary air pipeline, deliver to and participate in burning in the kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100479115A CN100480206C (en) | 2006-09-27 | 2006-09-27 | Low heat value gas oxygen-enriched burning process in rotary lime kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100479115A CN100480206C (en) | 2006-09-27 | 2006-09-27 | Low heat value gas oxygen-enriched burning process in rotary lime kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1931766A true CN1931766A (en) | 2007-03-21 |
| CN100480206C CN100480206C (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100479115A Active CN100480206C (en) | 2006-09-27 | 2006-09-27 | Low heat value gas oxygen-enriched burning process in rotary lime kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100480206C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269919B (en) * | 2008-05-08 | 2010-06-09 | 贾会平 | Vertical kiln apparatus for materials calcination |
| CN102679350A (en) * | 2012-05-11 | 2012-09-19 | 王林海 | Gas and oxygen mixed combustion method for cupola furnace and cupola furnace |
| CN102745914A (en) * | 2012-07-03 | 2012-10-24 | 江苏永钢集团有限公司 | Roasting process for active lime in rotary kiln |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN106220004A (en) * | 2016-07-23 | 2016-12-14 | 襄汾县鸿达集团水泥建材有限公司 | The rotary kiln production line of dinectly bruning powdered lime and production method |
| CN109574523A (en) * | 2018-12-25 | 2019-04-05 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt |
| CN110627384A (en) * | 2019-10-18 | 2019-12-31 | 湖北大学 | Process method for preparing active calcium oxide by oxygen-enriched calcination |
| CN110642542A (en) * | 2019-06-29 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for preparing lime for steelmaking refining |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | Double-chamber lime kiln |
| CN115321846A (en) * | 2022-09-13 | 2022-11-11 | 石横特钢集团有限公司 | Calcining method for separately using blast furnace gas in double-hearth lime kiln |
-
2006
- 2006-09-27 CN CNB2006100479115A patent/CN100480206C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269919B (en) * | 2008-05-08 | 2010-06-09 | 贾会平 | Vertical kiln apparatus for materials calcination |
| CN102679350A (en) * | 2012-05-11 | 2012-09-19 | 王林海 | Gas and oxygen mixed combustion method for cupola furnace and cupola furnace |
| CN102679350B (en) * | 2012-05-11 | 2016-06-01 | 王林海 | A kind of method of combustion gas for furnace cupola and oxygen mix burning and furnace cupola |
| CN102745914A (en) * | 2012-07-03 | 2012-10-24 | 江苏永钢集团有限公司 | Roasting process for active lime in rotary kiln |
| CN104058606A (en) * | 2014-05-31 | 2014-09-24 | 石家庄新华能源环保科技股份有限公司 | Method and device for producing lime by oxygen-enriched combustion |
| CN104058606B (en) * | 2014-05-31 | 2016-08-24 | 石家庄新华能源环保科技股份有限公司 | Oxygen-enriched combusting produces the method and apparatus of lime |
| CN106220004A (en) * | 2016-07-23 | 2016-12-14 | 襄汾县鸿达集团水泥建材有限公司 | The rotary kiln production line of dinectly bruning powdered lime and production method |
| CN109574523A (en) * | 2018-12-25 | 2019-04-05 | 石家庄新华能源环保科技股份有限公司 | A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt |
| CN109574523B (en) * | 2018-12-25 | 2024-04-16 | 石家庄新华能源环保科技股份有限公司 | Lime kiln for directly burning high-temperature coal gas of gasification furnace in hot feeding manner |
| CN110642542A (en) * | 2019-06-29 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for preparing lime for steelmaking refining |
| CN110642542B (en) * | 2019-06-29 | 2022-06-21 | 广东韶钢松山股份有限公司 | Method for preparing lime for steelmaking refining |
| CN110627384A (en) * | 2019-10-18 | 2019-12-31 | 湖北大学 | Process method for preparing active calcium oxide by oxygen-enriched calcination |
| CN111454004A (en) * | 2020-04-23 | 2020-07-28 | 中冶南方武汉钢铁设计研究院有限公司 | Double-chamber lime kiln |
| CN115321846A (en) * | 2022-09-13 | 2022-11-11 | 石横特钢集团有限公司 | Calcining method for separately using blast furnace gas in double-hearth lime kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100480206C (en) | 2009-04-22 |
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Owner name: ACRE COKING + REFRACTORY ENGINEERING CONSULTING CO Free format text: FORMER OWNER: ACRE COKING + REFRACTORY ENGINEERING CO., LTD. Effective date: 20100519 |
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Free format text: CORRECT: ADDRESS; FROM: 114002 NO.27 SHENGLI SOUTH ROAD, TIEDONG DISTRICT, ANSHAN CITY, LIAONING PROVINCE TO: 116023 NO.128, QIXIANLING GAONENG STREET, HIGH-TECH INDUSTRY PARK, DALIAN CITY, LIAONING PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100519 Address after: Dalian high tech Industrial Park, 116023 Liaoning province Qixianling high-energy Street No. 128 Patentee after: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Address before: 114002 No. 27 Shengli South Road, Anshan, Liaoning Patentee before: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION, MCC |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Oxygen enriched combustion process of low calorific value gas in lime rotary kiln Effective date of registration: 20211203 Granted publication date: 20090422 Pledgee: Dalian Branch of Bank of Communications Co.,Ltd. Pledgor: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Registration number: Y2021210000090 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20090422 Pledgee: Dalian Branch of Bank of Communications Co.,Ltd. Pledgor: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Registration number: Y2021210000090 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |