CN104030580A - Combustion system of sleeve limekiln using blast furnace gas - Google Patents
Combustion system of sleeve limekiln using blast furnace gas Download PDFInfo
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- CN104030580A CN104030580A CN201310072825.XA CN201310072825A CN104030580A CN 104030580 A CN104030580 A CN 104030580A CN 201310072825 A CN201310072825 A CN 201310072825A CN 104030580 A CN104030580 A CN 104030580A
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Abstract
The invention relates to a sleeve limekiln. A combustion system of a sleeve limekiln using blast furnace gas is characterized in that the blast furnace gas goes through a gas heat exchanger to make the temperature rise to 150DEG C, the blast furnace gas with the temperature of 150DEG C is input into the sleeve limekiln, the kiln feeding pressure of the blast furnace gas reaches above 16kpa, and the blast furnace gas is input into an upper combustion chamber and a lower combustion chamber from burners; the air excess coefficient is adjusted to 1.1-1.4, and the air excel proportion is reduced to make the blast furnace gas undergo proper oxygen combustion in the upper combustion chamber and the lower combustion chamber; and flue gas used for heat exchange is from the heat exchanger exhaust gas from the sleeve limekiln, and the exhaust gas and the gas fed into the kiln undergo one time heat exchange, and then the exhaust gas is discharged to the outside. The combustion system realizes a reasonable proportion of the blast furnace gas in lime calcining in order to make the temperatures of the upper combustion chamber and the lower combustion chamber reach theoretical combustion temperatures required by production.
Description
Technical field
The present invention relates to sleeve lime kiln, relate in particular to a kind of firing system of sleeve lime kiln.
Background technology
At present, domestic, in the world high heating value combustion gas (calorific value is greater than 1400Kcal/Nm
3) on sleeve kiln, obtain extensively and successfully application, but there is no the sleeve kiln ripe precedent of blast furnace gas.If use calorific value is 750kcal/m
3when low-heat value gas, the in the situation that of original technology level, the temperature of combustion of lower combustion chamber is obviously on the low side, determine in the combustion space of kiln type shortly, Wingdale is realized the time that decomposition need to be longer completely, and raw burn rate obviously increases, and therefore output and lime quality all will significantly decline.This is the lethal factor that fuel gas with low heat value fails to use on sleeve kiln.
Summary of the invention
The present invention is intended to address the aforementioned drawbacks, and the firing system of a kind of blast furnace gas for sleeve lime kiln is provided.The present invention makes low-calorie blast furnace gas can be used for sleeve lime kiln, changes blast furnace gas by waste becoming treasure simultaneously.
For addressing the above problem, a kind of blast furnace gas is for the firing system of sleeve lime kiln, it comprises: the blast furnace gas of bringing from gas holder is after gas change heater, temperature increase to 150 DEG C is inputted in sleeve lime kiln again, simultaneously blast furnace gas enters more than furnace pressure power reaches 16kpa, inputs upper and lower combustion chamber by burner; Adjust coefficient of excess air simultaneously and reach 1.1～1.4, reduce air excess ratio, make its suitable oxygen burning in upper and lower combustion chamber; Be used for the flue gas of heat exchange from the interchanger waste gas of sleeve lime kiln, this waste gas, is got rid of outside kiln again through a heat exchange with the coal gas that enters kiln.Can make blast furnace gas reach a rational proportioning when the lime kilning by this system, produce the required theoretical temperatures of 1200 DEG C thereby upper and lower chamber temperature can be reached.On the resistance to material of sleeve lime kiln combustion chamber, increase seven apertures in the human head gitter brick, to prevent the de-fire of blast furnace gas simultaneously.
It is 750Kcal/Nm that the present invention makes calorific value
3pure blast furnace gas be applied to the calcining of sleeve lime kiln, and calcine out activity degree and be greater than 340ml(4N HCl 10min) lime.The emission problem that has simultaneously solved in a large number low heat value, low-grade blast furnace gas, meets national policy requirement.Filled up an application blank in lime technology industry, the fuel applications scope that has expanded sleeve kiln simultaneously.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Fig. 1 is that the blast furnace gas of firing system of the present invention moves towards schematic diagram;
Fig. 2 states gas change heater schematic diagram described in being;
Fig. 3 is described burner schematic diagram.
Embodiment
Refer to Fig. 1, a kind of blast furnace gas is for the firing system of sleeve lime kiln, it comprises: the blast furnace gas of bringing from gas holder is after gas change heater 1, temperature increase to 150 DEG C is inputted in sleeve lime kiln again, simultaneously blast furnace gas enters more than furnace pressure power reaches 16kpa, inputs upper and lower combustion chamber by burner 2; Adjust coefficient of excess air simultaneously and reach 1.1～1.4, reduce air excess ratio, make its suitable oxygen burning in upper and lower combustion chamber; Be used for the flue gas of heat exchange from the interchanger waste gas of sleeve lime kiln, this waste gas, is got rid of outside kiln again through a heat exchange with the coal gas that enters kiln.Can make blast furnace gas reach a rational proportioning when the lime kilning by this system, produce the required theoretical temperatures of 1200 DEG C thereby upper and lower chamber temperature can be reached.On the resistance to material of sleeve lime kiln combustion chamber, increase seven apertures in the human head gitter brick, to prevent the de-fire of blast furnace gas simultaneously.
Now please see Figure 2, visible, gas change heater 1 adopts shell and tube, walk in gas change heater pipe outside from flue gas out in kiln body air heat exchanger, heat exchange coal gas is walked in pipe the inside, for improving the individual heat transfer coefficient of extratubal fluid, some baffle plates is installed in housing simultaneously.Baffle plate can improve shell-side fluid speed, force fluid in accordance with regulations distance repeatedly laterally by tube bank, enhance fluid turbulent extent.Heat transfer tube is pressed equilateral triangle or square pitch arrangement on tube sheet.Triangular arranged is compacter, and pipe outer air less turbulence is high, and individual heat transfer coefficient is large; Square pitch arrangement is managed outer easy to clean, is applicable to the fluid of easy fouling.For improving gas velocity in pipe, in the bobbin carriage of two ends, dividing plate is set, whole pipes are divided into some groups, effectively reclaim the heat in tail gas, it is effectively used.
As shown in Figure 3, burner 2 adopts two channels burner, makes coal gas effectively be transported to pars basilaris pontis and fully burns.Lower burner adopts three concentric tubes, and coal gas is walked in inner ring and outer ring, and air flows out from intermediate casing, coal gas and air split flow, so mixing is slower, the length of flame is longer; Upper burner adopts reducing shape, and flame is relatively short, and empty combustion gas mixing is abundant, can play two concentric tubes of supplementary employing to fire box temperature, and spout regulates.
Claims (4)
1. blast furnace gas, for a firing system for sleeve lime kiln, is characterized in that; It comprises: blast furnace gas is after gas change heater, and temperature increase to 150 DEG C is inputted in sleeve lime kiln again, and simultaneously blast furnace gas enters more than furnace pressure power reaches 16kpa, inputs upper and lower combustion chamber by burner; Adjust coefficient of excess air simultaneously and reach 1.1～1.4, reduce air excess ratio, make its suitable oxygen burning in upper and lower combustion chamber; Be used for the flue gas of heat exchange from the interchanger waste gas of sleeve lime kiln, this waste gas again through a heat exchange, is got rid of kiln with the coal gas that enters kiln, and described upper and lower chamber temperature reaches produces required 1200 DEG C.
2. a kind of blast furnace gas according to claim 1, for the firing system of sleeve lime kiln, is characterized in that, has additional seven apertures in the human head gitter brick to prevent the de-fire of blast furnace gas on the resistance to material of described sleeve lime kiln combustion chamber.
3. a kind of blast furnace gas according to claim 1 is for the firing system of sleeve lime kiln, it is characterized in that, described gas change heater is shell and tube gas change heater, walk in described coal gas heat transfer tube outside from hot flue gas out in the air heat exchanger of limestone kiln body, blast furnace coal is made leave with rage in heat transfer tube the inside, and heat transfer tube is pressed equilateral triangle or square pitch arrangement on tube sheet; One group of baffle plate is installed in the housing of gas change heater.
4. a kind of blast furnace gas according to claim 1 is for the firing system of sleeve lime kiln, it is characterized in that, in described upper and lower combustion chamber, be provided with as two channels burner, be divided into upper and lower burner, described upper burner is two concentric tubes that adopt reducing shape: described lower burner is three concentric tubes, coal gas is walked in inner ring and outer ring, and air flows out from intermediate casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072825.XA CN104030580A (en) | 2013-03-07 | 2013-03-07 | Combustion system of sleeve limekiln using blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072825.XA CN104030580A (en) | 2013-03-07 | 2013-03-07 | Combustion system of sleeve limekiln using blast furnace gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104030580A true CN104030580A (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310072825.XA Pending CN104030580A (en) | 2013-03-07 | 2013-03-07 | Combustion system of sleeve limekiln using blast furnace gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271842A (en) * | 2015-09-30 | 2016-01-27 | 山东钢铁股份有限公司 | Method for calcining active lime by use of mixed gas in lime sleeve kiln |
| CN105645792A (en) * | 2016-03-01 | 2016-06-08 | 济南力士源机电科技有限公司 | Method for roasting lime with blast furnace gas in sleeve lime kiln |
| CN110966872A (en) * | 2018-09-30 | 2020-04-07 | 南京梅山冶金发展有限公司 | Sleeve kiln gas flow fine adjustment method based on heat exchanger state |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643038A (en) * | 2012-03-30 | 2012-08-22 | 中信重工机械股份有限公司 | Process for calcining high-activity lime by utilizing low-heating value blast furnace coal gas |
-
2013
- 2013-03-07 CN CN201310072825.XA patent/CN104030580A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643038A (en) * | 2012-03-30 | 2012-08-22 | 中信重工机械股份有限公司 | Process for calcining high-activity lime by utilizing low-heating value blast furnace coal gas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271842A (en) * | 2015-09-30 | 2016-01-27 | 山东钢铁股份有限公司 | Method for calcining active lime by use of mixed gas in lime sleeve kiln |
| CN105271842B (en) * | 2015-09-30 | 2017-04-19 | 山东钢铁股份有限公司 | Method for calcining active lime by use of mixed gas in lime sleeve kiln |
| CN105645792A (en) * | 2016-03-01 | 2016-06-08 | 济南力士源机电科技有限公司 | Method for roasting lime with blast furnace gas in sleeve lime kiln |
| CN105645792B (en) * | 2016-03-01 | 2017-07-21 | 济南力士源机电科技有限公司 | A kind of method that sleeve lime kiln is calcined lime using blast furnace gas |
| CN110966872A (en) * | 2018-09-30 | 2020-04-07 | 南京梅山冶金发展有限公司 | Sleeve kiln gas flow fine adjustment method based on heat exchanger state |
| CN110966872B (en) * | 2018-09-30 | 2021-11-19 | 南京梅山冶金发展有限公司 | Sleeve kiln gas flow fine adjustment method based on heat exchanger state |
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Application publication date: 20140910 |