CN103936307B - A kind of sleeve kiln low temperature lime production method - Google Patents
A kind of sleeve kiln low temperature lime production method Download PDFInfo
- Publication number
- CN103936307B CN103936307B CN201410113866.3A CN201410113866A CN103936307B CN 103936307 B CN103936307 B CN 103936307B CN 201410113866 A CN201410113866 A CN 201410113866A CN 103936307 B CN103936307 B CN 103936307B
- Authority
- CN
- China
- Prior art keywords
- output
- pressure
- ton
- air
- kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The present invention relates to a kind of sleeve kiln low temperature lime production method, carry out the injection bore≤48mm of (1) spray tube as follows; (2) pressure of spray tube is entered according to gas product flow readjustment high-speed gas specific as follows: output≤250 ton, pressure 38kPa; Output 250-300 ton, pressure 39kPa; Output 300-330 ton, pressure 40kPa; Output 330-350 ton, pressure 41kPa; Output 350-380 ton, pressure 42kPa; Output 380-420 ton, pressure 43kPa; Output >=420 ton, pressure 43kPa; (3) minimum raising 5 DEG C on the temperature basis of existing recycle gas; (4) according to change of production, the partition ratio of cooling air is at 0.49-0.53; (5) close lower combustion chamber's secondary air, reduce air output 1000-1500m3/h; (6) control raw material limestone grade to distribute and cleanliness factor, limestone granularity is 40-70mm, and diameter is less than 40mm and is greater than ratio sum≤4% of Wingdale of 70mm; Implement this production method, lime temperature compared with normal ash discharge temperature can reduce by 30 DEG C.
Description
Technical field
The present invention relates to a kind of lime production method, especially a kind of sleeve kiln low temperature lime production method, belongs to calcining technology field.
Background technology
Along with development and the constructional transfer of industrial society, extensive Development patterns is also come more to be restricted, and the Economic Development Mode of environmental protection intensive style seems further important; In traditional mass transport, open type flat belt accounts for the overwhelming majority, now gradually by air conveying or tubular belt replace.But because pipe turns the material character of belt self, can not carry high-temperature material, therefore, reducing the temperature being transferred material is a problem being worth discussing; Sleeve lime kiln is the one in limestone kiln, primarily of inner core and urceolus composition, and inner core and urceolus arranged concentric, form an annular space, Wingdale is just calcined in this annular region; Kiln body is divided into preheating zone from top to bottom, adverse current calcining zone, and flows calcining zone and cooling zone; Preheating zone utilizes the high temperature air preheating lime stone material after calcining, and calcining zone utilizes burning liberated heat to calcine Wingdale, makes decomposition of limestone become lime and carbonic acid gas, and cooling zone utilizes freezing air to cool the lime after calcining; The time length that the metallurgy lime ash discharge temperature that sleeve kiln is produced depends on raw burn degree and stops in kiln, recycle gas temperature is reflection lime quality most important parameter, and therefore how reasonably reducing tapping temperature and improving recycle gas efficiency then becomes a crucial working point; Find to authorize day to be 2013.9.18 through retrieval, application number be 201210124850.3 Chinese patent disclose " a kind of sleeve kiln lime cooling apparatus ", this equipment reaches the object of cooling by the arrangement design of ventilation hole, but this equipment does not provide concrete design variable and method, actually current Problems existing can not be solved.
Summary of the invention
Technical problem to be solved by this invention is: overcome prior art Problems existing, provides the sleeve kiln low temperature lime production method of cooling in a kind of kiln.
The technical scheme that the present invention solves its technical problem is as follows:
A kind of sleeve kiln low temperature lime production method, the kiln body of sleeve kiln includes inner sleeve, upper and lower combustion chamber is provided with it at kiln, lime cooling air inlet is provided with in the bottom of kiln body, outside upper and lower combustion chamber, upper and lower burner is installed respectively, upper burner radial direction connects the First air being derived from inner sleeve interlayer, the lower burner bright eruption place radial direction of lower combustion chamber connects the secondary air being derived from interchanger, the gas channel of combustion chamber in kiln body is connected with bottom inner sleeve, is communicated with above inner sleeve through return flow line with air-supply assembly; Also be provided with air-supply assembly in sleeve kiln, air-supply assembly comprises outside for carrying the ventpipe of high temperature circulation gas and being inserted in the spray tube for carrying high-speed gas of injector blast inlet; The method comprises the following steps:
(1) the injection bore≤48mm of spray tube is made;
Applicant thinks: the setting entrance pipe of ventpipe and the pressure of outlet section pipe are respectively P
4and P
0, the blast inlet of injector and the pressure reduction of air outlet are:
Wherein: P
4-P
0for ventpipe import and export pressure reduction, unit Pa; A
1for spray tube exit area, unit m
2; A
3for mixing section tube section area, unit m
2; ρ
1for the density of high-speed gas, units/kg/m
3; ω
1for the flow velocity that high-speed gas exports at spray tube, unit m/s.
Formula is known thus, when other parameter remains unchanged, reduces A
1ω can be impelled
1improve, go deep into practical studies checking through applicant, the injection bore of spray tube is adjusted to 48mm at the most, driving air flow quantity can be reduced, improve and drive air pressure and recycle gas flow, make and flow calcine more abundant, lime cooling is more even, makes full kiln coefficient of excess air more reasonable.
(2) pressure of spray tube is entered according to gas product flow readjustment high-speed gas specific as follows: output≤250 ton, pressure 38kPa; Output 250-300 ton, pressure 39kPa; Output 300-330 ton, pressure 40kPa; Output 330-350 ton, pressure 41kPa; Output 350-380 ton, pressure 42kPa; Output 380-420 ton, pressure 43kPa; Output >=420 ton, pressure 43kPa;
Be greater than after 420 tons at day output, drive the pressure change of wind very little, main two reasons: one is the security standpoint of equipment itself, two be the flow ascensional range of driving wind itself compare slow, can no longer improve.
(3) existing recycle gas temperature 760-880 DEG C, minimum raising 5 DEG C on the temperature basis of existing recycle gas;
Raw burn rate can be reduced like this.
(4) partition ratio adjusting cooling air is 0.49-0.53, and cooling air partition ratio=cooling air flow/kiln hourly output, cooling air flux unit is m
3/ h, kiln hourly output unit is kg/h;
Can guarantee like this to provide enough cooling airs, sleeve kiln cooling zone utilizes freezing air to cool the lime after calcining, and cooling zone cooling air is evenly distributed, ash discharge temperature-stable, improves the quality of lime product.
(5) close lower combustion chamber's secondary air, reduce air output 1000-1500m
3/ h;
The object of closing 2 wind reduces exhausted air quantity in kiln exactly, reduces the load of high-temperature blower; This step operation simultaneously can reduce cooling air flow and drive the impact of wind flow increase on air utilization coefficient.
(6) adopt granularity to be the Wingdale of 40-70mm, and control ratio sum≤4% of Wingdale that diameter is less than 40mm and is greater than 70mm;
The apparent cleanliness factor of Wingdale is most important, has influence on the ventilation property in kiln, and produces dross; Therefore need to control raw material limestone grade to distribute and cleanliness factor.
The further technical scheme of the present invention is as follows:
Further, in step (1), the injection bore of spray tube is 48mm; In step (3), the temperature of recycle gas improves 5 DEG C; In step (4), the partition ratio of cooling air is 0.49-0.50; Air output 1000-1200m is reduced in step (5)
3/ h; In step (6), limestone granularity is 40-50mm, and it is 4% that diameter is less than 40mm with the ratio sum of the Wingdale being greater than 70mm.
Further, in step (1), the injection bore of spray tube is 47mm; In step (3), the temperature of recycle gas improves 10 DEG C; In step (4), the partition ratio of cooling air is 0.50-0.53; Air output 1200-1500m is reduced in step (5)
3/ h; In step (6), limestone granularity is 50-70mm, and it is 3% that diameter is less than 40mm with the ratio sum of the Wingdale being greater than 70mm.
Beneficial effect of the present invention is as follows:
1, the sleeve kiln of day output more than 400 tons, ash discharge temperature range general is at present probably at 150-200 degree, by the production method using above each step to be combined to form, lime temperature compared with normal ash discharge temperature can reduce by 30 DEG C, cooling-down effect is remarkable, effectively realize cooling in kiln, realize the major technological breakthrough of this area;
2, found out the relation driven between wind flow and output by great many of experiments, under the prerequisite that product is produced smoothly, made the pressure of high-speed gas reach optimum;
3, by limiting the specification of raw material, raw material is dropped to minimum on the impact of producing;
4, by deriving to the theoretical model of air-supply assembly, shown that the best of spray tube sprays bore scope.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention air-supply unit construction used schematic diagram.
Embodiment
With reference to the accompanying drawings and the present invention is described in further detail in conjunction with the embodiments.But the invention is not restricted to given example.
Embodiment
The sleeve kiln low temperature lime production method of the present embodiment, the kiln body of sleeve kiln includes inner sleeve, upper and lower combustion chamber is provided with it at kiln, lime cooling air inlet is provided with in the bottom of kiln body, outside upper and lower combustion chamber, upper and lower burner is installed respectively, upper burner radial direction connects the First air being derived from inner sleeve interlayer, the lower burner bright eruption place radial direction of lower combustion chamber connects the secondary air being derived from interchanger, the gas channel of combustion chamber in kiln body is connected with bottom inner sleeve, be communicated with air-supply assembly through return flow line above inner sleeve
Carry out as follows:
(1) the injection bore d1≤48mm of spray tube; The air-supply assembly of recycle gas as shown in Figure 1, described air-supply assembly comprises outside for carrying the ventpipe of high temperature circulation gas and being inserted in the spray tube for carrying high-speed gas of described injector blast inlet, described ventpipe primarily of receive recycle gas bellmouth entrance section pipe, form for the mixing section pipe of mixing two fluids and the outlet section pipe of diffusion speedup; The setting entrance pipe of ventpipe and the pressure of outlet section pipe are respectively P
4and P
0, the blast inlet of injector and the pressure reduction of air outlet are:
Wherein: P
4-P
0for ventpipe import and export pressure reduction, unit Pa; A
1for spray tube exit area, unit m
2; A
3for mixing section tube section area, unit m
2; ρ
1for the density of high-speed gas, units/kg/m
3; ω
1for the flow velocity that high-speed gas exports at spray tube, unit m/s.
| Embodiment | Embodiment 1 | Embodiment 2 |
| Spray bore (unit: mm) | 48 | 47 |
；
(2) pressure of spray tube is entered according to gas product flow readjustment high-speed gas specific as follows: output≤250 ton, pressure 38kPa; Output 250-300 ton, pressure 39kPa; Output 300-330 ton, pressure 40kPa; Output 330-350 ton, pressure 41kPa; Output 350-380 ton, pressure 42kPa; Output 380-420 ton, pressure 43kPa; Output >=420 ton, pressure 43kPa; Be greater than after 420 tons at day output, drive the pressure change of wind very little, main two reasons: one is the security standpoint of equipment itself, two be the flow ascensional range of driving wind itself compare slow, can no longer improve;
(3) minimum raising 5 DEG C on the temperature basis of existing recycle gas; This improves the upper limit to reduce raw burn rate;
| Embodiment | Embodiment 1 | Embodiment 2 |
| Recycle gas temperature (unit: DEG C) | 5 | 10 |
；
(4) enough cooling airs, according to change of production, the partition ratio of cooling air is at 0.49-0.53; Sleeve kiln cooling zone utilizes freezing air to cool the lime after calcining, and cooling zone cooling air is evenly distributed, ash discharge temperature-stable, improves the quality of lime product;
| Embodiment | Embodiment 1 | Embodiment 2 |
| The partition ratio (unit: nothing) of cooling air | 0.49-0.50 | 0.50-0.53 |
；
(5) close lower combustion chamber's secondary air, reduce air output 1000-1500m
3/ h, this is to reduce cooling air flow and driving the impact of wind flow increase on air utilization coefficient;
| Embodiment | Embodiment 1 | Embodiment 2 |
| Air output (unit: m 3/h) | 1000-1200 | 1200-1500 |
；
(6) the apparent cleanliness factor of Wingdale is most important, has influence on the ventilation property in kiln, and produces dross; Therefore need to control raw material limestone grade to distribute and cleanliness factor, limestone granularity is 40-70mm, and diameter is less than 40mm and is greater than ratio sum≤4% of Wingdale of 70mm;
| Embodiment | Embodiment 1 | Embodiment 2 |
| Limestone granularity (unit: mm) | 1000-1200 | 1200-1500 |
| Diameter is less than 40mm and is greater than the ratio of Wingdale of 70mm | 4％ | 3％ |
；
The sleeve kiln that day output is more than 400 tons, ash discharge temperature range general is at present probably at 150-200 degree, by the production method using above each step to be combined to form, lime temperature compared with normal ash discharge temperature can reduce by 30 DEG C, cooling-down effect is remarkable, effectively realize cooling in kiln, realize the major technological breakthrough of this area;
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (3)
1. a sleeve kiln low temperature lime production method, the kiln body of described sleeve kiln includes inner sleeve, upper and lower combustion chamber is provided with it at kiln, lime cooling air inlet is provided with in the bottom of described kiln body, outside described upper and lower combustion chamber, upper and lower burner is installed respectively, described upper burner radial direction connects the First air being derived from inner sleeve interlayer, the lower burner bright eruption place radial direction of described lower combustion chamber connects the secondary air being derived from interchanger, the gas channel of combustion chamber in kiln body is connected with bottom inner sleeve, is communicated with above described inner sleeve through return flow line with air-supply assembly; Described air-supply assembly comprises outside for carrying the ventpipe of high temperature circulation gas and being inserted in the spray tube for carrying high-speed gas of injector blast inlet; It is characterized in that, comprise the following steps:
(1) the injection bore≤48mm of spray tube is made;
(2) pressure of spray tube is entered according to gas product flow readjustment high-speed gas specific as follows: day output≤250 ton, pressure 38kPa; 250 tons of < day output≤300 ton, pressure 39kPa; 300 tons of < day output≤330 ton, pressure 40kPa; 330 tons of < day output≤350 ton, pressure 41kPa; 350 tons of < day output≤380 ton, pressure 42kPa; 380 tons of < day output < 420 tons, pressure 43kPa; Day output >=420 ton, pressure 43kPa;
(3) existing recycle gas temperature 760-880 DEG C, minimum raising 5 DEG C on the temperature basis of existing recycle gas;
(4) partition ratio adjusting cooling air is 0.49-0.53, cooling air partition ratio=cooling air flow/kiln hourly output, and cooling air flux unit is m3/h, and kiln hourly output unit is kg/h;
(5) close lower combustion chamber's secondary air, reduce air output 1000-1500m3/h;
(6) adopt granularity to be the Wingdale of 40-70mm, and control ratio sum≤4% of Wingdale that diameter is less than 40mm and is greater than 70mm.
2. sleeve kiln low temperature lime production method according to claim 1, is characterized in that: in step (1), the injection bore of spray tube is 48mm; In step (3), the temperature of recycle gas improves 5 DEG C; According to output in step (4), the partition ratio of cooling air is at 0.49-0.50; Air output 1000-1200m3/h is reduced in step (5); In step (6), limestone granularity is 40-50mm, and it is 4% that diameter is less than 40mm with the ratio sum of the Wingdale being greater than 70mm.
3. sleeve kiln low temperature lime production method according to claim 1, is characterized in that: in step (1), the injection bore of spray tube is 47mm; In step (3), the temperature of recycle gas improves 10 DEG C; According to output in step (4), the partition ratio of cooling air is at 0.50-0.53; Air output 1200-1500m3/h is reduced in step (5); In step (6), limestone granularity is 50-70mm, and it is 3% that diameter is less than 40mm with the ratio sum of the Wingdale being greater than 70mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410113866.3A CN103936307B (en) | 2014-03-25 | 2014-03-25 | A kind of sleeve kiln low temperature lime production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410113866.3A CN103936307B (en) | 2014-03-25 | 2014-03-25 | A kind of sleeve kiln low temperature lime production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103936307A CN103936307A (en) | 2014-07-23 |
| CN103936307B true CN103936307B (en) | 2016-01-20 |
Family
ID=51184230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410113866.3A Active CN103936307B (en) | 2014-03-25 | 2014-03-25 | A kind of sleeve kiln low temperature lime production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103936307B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851238A (en) * | 2017-11-30 | 2019-06-07 | 南京梅山冶金发展有限公司 | A kind of method of stable annular lime kiln cocurrent burning zone control |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431407A (en) * | 1981-10-13 | 1984-02-14 | Ulrich Beckenbach | Process for burning limestone, dolomite or the like and annular shaft furnace for performing the same |
| US4668184A (en) * | 1986-07-08 | 1987-05-26 | Fuller Company | Annular shaft kiln |
| KR100894056B1 (en) * | 2002-10-15 | 2009-04-21 | 주식회사 포스코 | Device for protecting closure of port for recuperator in shaft kiln |
| CN102627417A (en) * | 2012-04-26 | 2012-08-08 | 石家庄市新华工业炉有限公司 | Lime cooling equipment of sleeve kiln |
| CN202836180U (en) * | 2012-08-08 | 2013-03-27 | 南京梅山冶金发展有限公司 | Ring-shaped sleeve kiln |
-
2014
- 2014-03-25 CN CN201410113866.3A patent/CN103936307B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4431407A (en) * | 1981-10-13 | 1984-02-14 | Ulrich Beckenbach | Process for burning limestone, dolomite or the like and annular shaft furnace for performing the same |
| US4668184A (en) * | 1986-07-08 | 1987-05-26 | Fuller Company | Annular shaft kiln |
| KR100894056B1 (en) * | 2002-10-15 | 2009-04-21 | 주식회사 포스코 | Device for protecting closure of port for recuperator in shaft kiln |
| CN102627417A (en) * | 2012-04-26 | 2012-08-08 | 石家庄市新华工业炉有限公司 | Lime cooling equipment of sleeve kiln |
| CN202836180U (en) * | 2012-08-08 | 2013-03-27 | 南京梅山冶金发展有限公司 | Ring-shaped sleeve kiln |
Non-Patent Citations (2)
| Title |
|---|
| 低热值煤气煅烧高品质石灰工艺分析;张全生;《现代冶金》;20131231;第41卷(第6期);23-25 * |
| 环型套筒窑结构优势及运行控制;王国强;《梅山科技》;20080715(第S1期);20-24 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103936307A (en) | 2014-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102517042B (en) | Method for heating coke oven capable of controlling multistage combustion | |
| CN102207286B (en) | Low-heating-value gas burner | |
| CN103708515B (en) | A kind of is that raw material adopts predecomposition explained hereafter α-Al with aluminium hydroxide 2o 3method | |
| CN102268266A (en) | Controllable multi-section-combustion heating molded coke oven | |
| CN106440811B (en) | A kind of sintering ignition device and ignition method | |
| CN103968671A (en) | Device and method for cooling clinker by liquid oxygen and liquid nitrogen of cement kiln | |
| CN101863627A (en) | Double-beam lime kiln | |
| CN103673592B (en) | The method and system of the combustion gas of a kind of preheating, sintering, igniting stove in parallel and combustion air | |
| CN103936307B (en) | A kind of sleeve kiln low temperature lime production method | |
| CN104457227B (en) | A kind of split type tunnel cave | |
| CN203807326U (en) | Energy-saving fuel gas glass melting furnace | |
| CN107337435A (en) | A kind of method for cooking of brick for antique architecture | |
| CN205151782U (en) | Calcium carbide furnace | |
| CN102288022A (en) | Sleeve-type gas-burning shaft kiln | |
| CN204039066U (en) | The furnace of calcium carbide that a kind of circulation of tail gas utilizes | |
| CN203625449U (en) | Micro-power hot air preheater for secondary sinter mixture | |
| CN203464678U (en) | Cupola furnace for rock wool production | |
| CN102351442B (en) | Method for material calcination and limekiln device | |
| CN101597057B (en) | Method for producing active carbon by core class charring material | |
| CN103922561A (en) | Energy-saving gas glass melting furnace | |
| CN102925181B (en) | High-pressure dry distillation technology and device for oil shale ores | |
| CN204401072U (en) | Continous way bar plate heating stove | |
| CN104192846B (en) | The furnace of calcium carbide that a kind of circulation of tail gas utilizes | |
| CN205979762U (en) | Raw materials oil gun for carbon black production | |
| CN205170893U (en) | Directly reduced iron's production system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |