CN103387347A - Method and device for producing active lime powder from calcined limestone - Google Patents
Method and device for producing active lime powder from calcined limestone Download PDFInfo
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- CN103387347A CN103387347A CN2013103295861A CN201310329586A CN103387347A CN 103387347 A CN103387347 A CN 103387347A CN 2013103295861 A CN2013103295861 A CN 2013103295861A CN 201310329586 A CN201310329586 A CN 201310329586A CN 103387347 A CN103387347 A CN 103387347A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The invention discloses a method for producing active lime powder from calcined limestone. The method comprises the following steps: (1) by taking limestone as a raw material, crushing and grinding the limestone to obtain limestone powder; (2) preheating the limestone powder by a suspension preheating system, and heating the limestone powder after preheating by a combustion decomposition furnace, so that the limestone powder is subjected to further heat absorption and decomposition; and (3) cooling the material subjected to heat decomposition in the step (2) to obtain the active lime powder through a suspension cooling system. The invention discloses a device for employing the method. The preheated limestone powder can be fed from the lower and middle parts of the combustion decomposition furnace, the temperature of the combustion decomposition furnace can be flexibly regulated, and the generated lime powder has high activity; caloric content in primary cyclone waste gas in the suspension preheating system and temperature rise air in the suspension cooling system is fully utilized, and the aim of saving energy in the system is fulfilled; moreover, the degree of automation is high, the production efficiency is high, and the production scale is conveniently enlarged.
Description
Technical field
The present invention relates to a kind of calcined limestone and produce the method and apparatus of lime powder, especially a kind of method and apparatus that utilizes the precalcining system calcined limestone of producing cement to produce lime powder.
Background technology
Lime (being unslaked lime) has a wide range of applications in fields such as metallurgy, building, chemical industry, environment, agriculturals, and the production process of lime is in fact calcium carbonate (CaCO
3) process of decomposes.
It is mainly rotary kiln and shaft furnace that the technique of quickened lime is produced in China's Wingdale calcination at present.Rotary kiln configures shaft preheater and shaft cooler mostly, and the quickened lime quality that its calcining obtains is good, activity degree is high, output is high and it is stable to produce, and can utilize 10～40mm fine fraction Wingdale.Shaft preheater is preheating to 800～900 ℃ with Wingdale, and rate of decomposition reaches 20～25%, and the decomposition of 75～80% Wingdales enters 1200～1350 ℃ of rotary kiln inherences and completes.Be mainly the not high radiation heat transfer of thermo-efficiency in rotary kiln, the surface radiating of cylinder of rotary kiln is excessive, causes system energy consumption to increase.
The external quickened lime of introducing shaft furnace production have activity degree high, give birth to that the burning rate is low, the uniform advantage of composition, but have simultaneously investment high, complicated operation, the not high shortcoming of easy-maintaining or maintenance cost.The quickened lime activity degree that domestic shaft furnace is calcined out is relatively low, and the Wingdale that needs use is mostly the bulk more than 40mm, and the mine utilization ratio is low.
Summary of the invention
The present invention provides a kind of method and apparatus that utilizes the precalcining system calcined limestone of producing cement to produce lime powder for solving the technical problem that exists in known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of calcined limestone is produced the method for active lime powder, comprises the following steps:
One) take Wingdale as raw material, broken rear grinding obtains limestone powder;
Two) adopt the suspension preheating system to carry out preheating to limestone powder, and adopt the combustion decomposition stove to heat and make its further thermal endothermic decomposition limestone powder after preheating;
Three) will be through step 2) material after thermolysis is through the cooling active lime powder that obtains of suspension cooling system.
The fuel that described combustion decomposition stove adopts is any one in coal, Sweet natural gas, fuel oil and refinery coke.
another technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the device that adopts the calcined limestone production active lime powder of aforesaid method, comprise the feeding unit that sets gradually, mulitistage cyclone, combustion decomposition stove and multistage cyclone water cooler, the top of described combustion decomposition stove is provided with band material air stream outlet, bottom is provided with air flow inlet, middle part and bottom are provided with material inlet, combustion decomposition furnace gas influx is connected with the air outlet of the one-level cyclone cylinder of described multistage cyclone water cooler, combustion decomposition furnace zone material air stream outlet is connected with the import airduct of the final stage cyclone cylinder of described mulitistage cyclone, combustion decomposition stove material inlet is connected with the feed opening of the penultimate stage cyclone cylinder of described mulitistage cyclone.
The bottom of described combustion decomposition stove is provided with burner.
Described feeding unit is connected with the cyclone cylinder import airduct of described suspension preheating system.
Advantage and positively effect that the present invention has are: 1) limestone powder after preheating can be from the bottom of combustion decomposition stove and middle part feeding, and the combustion decomposition furnace temperature can flexible, can guarantee that the lime powder activity that generates is high; 2) take full advantage of out the one-level cyclone cylinder waste gas of suspension preheating system and the heat content of the interior intensification air of suspension cooling system, reach the purpose of energy saving of system; 3) level of automation is high, and production efficiency is high, is convenient to expand the scale of production.
Description of drawings
Fig. 1 is the structural representation that calcined limestone of the present invention is produced the device of active lime powder.
In figure: the 1st, feeding unit, the 2nd, preheater one-level cyclone cylinder, the 3rd, preheater secondary rotary air duct, the 4th, three grades of cyclone cylinders of preheater, the 5th, preheater Category Four cyclone cylinder, the 6th, combustion decomposition stove, the 7th, preheater five-stage whirlwind cylinder, the 8th, cooling cyclone one-level cyclone cylinder, the 9th, cooling cyclone secondary rotary air duct, the 10th, three grades of cyclone cylinders of cooling cyclone, the 11st, cooling air, the 12nd, dust-precipitator, the 13rd, material distributing valve, the 14th, burner.
Embodiment
, for further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
The invention discloses a kind of calcined limestone and produce the method for active lime powder, comprise the following steps:
One) take Wingdale as raw material, broken rear grinding obtains limestone powder;
Two) adopt the suspension preheating system to carry out preheating to limestone powder, and adopt the combustion decomposition stove to heat and make its further thermal endothermic decomposition limestone powder after preheating;
Three) will be through step 2) material after thermolysis is through the cooling active lime powder that obtains of suspension cooling system.
The fuel that described combustion decomposition stove adopts is any one in coal, Sweet natural gas, fuel oil and refinery coke.
see also Fig. 1, adopt the aforesaid method calcined limestone to produce the device of active lime powder, comprise the grinding system (not shown) that sets gradually, feeding unit, mulitistage cyclone, combustion decomposition stove 6, the multistage cyclone water cooler, the top of described combustion decomposition stove 6 is provided with band material air stream outlet, bottom is provided with air flow inlet, middle part and bottom are provided with material inlet, combustion decomposition furnace gas influx is connected with the air outlet of the one-level cyclone cylinder 8 of described multistage cyclone water cooler, combustion decomposition furnace zone material air stream outlet is connected with the import airduct of the final stage cyclone cylinder of described mulitistage cyclone, combustion decomposition stove material inlet is connected with the feed opening of the penultimate stage cyclone cylinder of mulitistage cyclone.The one-level cyclone cylinder of described pre-heating system is connected the charging airduct and is connected with feeding unit 1 respectively with the secondary rotary air duct.The one-level cyclone cylinder 2 of described pre-heating system is provided with the airduct that is connected with grinding system.
The principle of work of the present embodiment:
Wingdale rises to the feeding unit of preheater tower top of the trellis by lift technique after grinding, at first material enters after by feeding unit after the import airduct of preheater one-level cyclone cylinder 2 through abundant dispersion, and carry out heat exchange with preheater secondary rotary air duct 3 air-flow out and realize pre-heating temperature elevation, then dust-contained airflow enters preheater one-level cyclone cylinder 2 and carries out gas solid separation, isolated material enters the import airduct of preheater secondary rotary air duct 3, and the air-flow after separation enters exhaust pipeline; Material enters after the import airduct of preheater secondary rotary air duct 3 through abundant dispersion, and with three grades of cyclone cylinders 4 of preheater air-flow out, carry out heat exchange, then dust-contained airflow enters preheater secondary rotary air duct 3 and carries out gas solid separation, isolated material enters the import airduct of three grades of cyclone cylinders 4 of preheater, and the air-flow after separation enters first step cyclone preheater 2; Material enters after the import airduct of three grades of cyclone cylinders 4 of preheater through abundant dispersion, and with preheater Category Four cyclone cylinder 5 air-flow out, carry out heat exchange, then dust-contained airflow enters three grades of cyclone cylinders of preheater 4 and carries out gas solid separation, isolated material enters the import airduct of preheater Category Four cyclone cylinder 5, and the air-flow after separation enters preheater secondary rotary air duct 3; Material enters after the import airduct of preheater Category Four cyclone cylinder 5 through abundant dispersion, and with preheater five-stage whirlwind cylinder 7 air-flow out, carry out heat exchange, then dust-contained airflow enters preheater Category Four cyclone cylinder 5 and carries out gas solid separation, isolated material enters combustion decomposition stove 6, and the air-flow after separation enters three grades of cyclone cylinders 4 of preheater; Material enters combustion decomposition stove 6 afterwards and cooling cyclone one-level cyclone cylinder 8 air-flow out carries out heat exchange, then dust-contained airflow enters preheater five-stage whirlwind cylinder 7 and carries out gas solid separation, isolated material enters the import airduct of cooling cyclone one-level cyclone cylinder 8, and the air-flow after separation enters preheater Category Four cyclone cylinder 5; Material enters after the import airduct of cooling cyclone one-level cyclone cylinder 8 through abundant dispersion, and carry out heat exchange with cooling cyclone secondary rotary air duct 9 air-flow out and realize cooling, then dust-contained airflow enters cooling cyclone one-level cyclone cylinder 8 and carries out gas solid separation, isolated material enters the import airduct of cooling cyclone secondary rotary air duct 9, and the air-flow after separation enters combustion decomposition stove 6; Material enters after the import airduct of cooling cyclone secondary rotary air duct 9 through abundant dispersion, and carry out heat exchange with three grades of cyclone cylinders 10 of cooling cyclone air-flow out and realize cooling, then dust-contained airflow enters cooling cyclone secondary rotary air duct 9 and carries out gas solid separation, isolated material enters the import airduct of three grades of cyclone cylinders 10 of cooling cyclone, and the air-flow after separation enters cooling cyclone one-level cyclone cylinder 8; Material enters after the import airduct of three grades of cyclone cylinders 10 of cooling cyclone through abundant dispersion, and carry out heat exchange with cooling air 11 and again lower the temperature, then dust-contained airflow enters three grades of cyclone cylinders of cooling cyclone 10 and carries out gas solid separation, an air-flow part after separation enters cooling cyclone secondary rotary air duct 9, remaining air-flow enters dust-precipitator 12, it is namely the active lime powder finished product that the material that dust-precipitator 12 is collected and three grades of isolated materials of cyclone cylinder 10 of cooling cyclone combine, and the gas after dust-precipitator 12 gathers dust enters the off gas treatment link.Burner 14 provides fuel for combustion decomposition stove 6.
Feeding unit 1 can be controlled flexibly limestone powder and enter the position of pre-heating system.All feed the import airduct of preheater one-level cyclone cylinder 2 when limestone powder, realize the Pyatyi heat exchange; All feed the import airduct of preheater secondary rotary air duct 4 when limestone powder, the level Four heat exchange only occurs.
The isolated material of preheater Category Four cyclone cylinder 5 enters combustion decomposition stove 6 through material distributing valve 13, by regulating the aperture of material distributing valve, can regulate the bottom that enters respectively the combustion decomposition stove and the material amount at middle part, thereby guarantees the flexible of combustion decomposition furnace temperature.
The present embodiment can also cause the waste gas that cyclone preheater one-level cyclone cylinder limestone powder grinding system oven dry Wingdale or cause fuel grinding system drying fuel.
In the present embodiment, pre-heating system is five-stage cyclone preheater, but is not limited to this.Preheater progression can also be level Four or three grades.
In the present embodiment, the multistage cyclone water cooler is comprised of three grades of cyclone cylinders, but is not limited to this.Can also be formed by the Category Four cyclone cylinder.
In the present embodiment, described combustion decomposition stove is fuel used is coal, can be also Sweet natural gas, fuel oil, refinery coke.
Content of the present invention is not limited in the above-described embodiment, and the technician in same area can propose other embodiment easily within technical director's thought of the present invention, but this embodiment should comprise within the scope of the invention.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention;, not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (5)
1. the method that calcined limestone is produced active lime powder, is characterized in that, comprises the following steps:
One) take Wingdale as raw material, broken rear grinding obtains limestone powder;
Two) adopt the suspension preheating system to carry out preheating to limestone powder, and adopt the combustion decomposition stove to heat and make its further thermal endothermic decomposition limestone powder after preheating;
Three) will be through step 2) material after thermolysis is through the cooling active lime powder that obtains of suspension cooling system.
2. the calcined limestone method of producing active lime powder according to claim 1, is characterized in that, the fuel that described combustion decomposition stove adopts is any one in coal, Sweet natural gas, fuel oil and refinery coke.
3. one kind is adopted the device of the calcined limestone production active lime powder of method as claimed in claim 1, it is characterized in that, comprise the feeding unit that sets gradually, mulitistage cyclone, combustion decomposition stove and multistage cyclone water cooler, the top of described combustion decomposition stove is provided with band material air stream outlet, bottom is provided with air flow inlet, middle part and bottom are provided with material inlet, combustion decomposition furnace gas influx is connected with the air outlet of the one-level cyclone cylinder of described multistage cyclone water cooler, combustion decomposition furnace zone material air stream outlet is connected with the import airduct of the final stage cyclone cylinder of described mulitistage cyclone, combustion decomposition stove material inlet is connected with the feed opening of the penultimate stage cyclone cylinder of described mulitistage cyclone.
4. calcined limestone is produced the device of active lime powder according to claim 3, and it is characterized in that: the bottom of described combustion decomposition stove is provided with burner.
5. calcined limestone is produced the device of active lime powder according to claim 3, and it is characterized in that: described feeding unit is connected with the cyclone cylinder import airduct of described suspension preheating system.
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| CN201310329586.1A CN103387347B (en) | 2013-07-30 | 2013-07-30 | Method and device for producing active lime powder from calcined limestone |
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| CN201310329586.1A CN103387347B (en) | 2013-07-30 | 2013-07-30 | Method and device for producing active lime powder from calcined limestone |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2593396C1 (en) * | 2015-03-17 | 2016-08-10 | Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Method of obtaining lime |
| CN105906223A (en) * | 2016-06-02 | 2016-08-31 | 浙江钙科机械设备有限公司 | Lime powder suspension calcining production line and suspension calcining process thereof |
| CN106587667A (en) * | 2016-12-28 | 2017-04-26 | 柳州市昌泉贸易有限公司 | Method for producing active lime powder by calcining limestone |
| CN106630690A (en) * | 2016-12-28 | 2017-05-10 | 柳州市昌泉贸易有限公司 | Method for producing high-activity lime through vacuum calcination |
| CN106673463A (en) * | 2016-12-28 | 2017-05-17 | 柳州市昌泉贸易有限公司 | Production method of high-activity lime |
| CN107226627A (en) * | 2017-07-10 | 2017-10-03 | 合肥水泥研究设计院 | A kind of two grades of suspension calcining devices of active powder lime |
| CN107698179A (en) * | 2017-12-01 | 2018-02-16 | 河南中蓝新材料科技有限公司 | A kind of strength gaseous suspension cooling means for being used to produce powdery active lime system |
| CN107759115A (en) * | 2017-12-12 | 2018-03-06 | 泰安中意重型工业设备有限公司 | The new process for calcining and device of a kind of powdered lime |
| CN107963629A (en) * | 2017-12-26 | 2018-04-27 | 神雾环保技术股份有限公司 | A kind of calcium carbide production process raw material preheating system and its application process |
| CN108059369A (en) * | 2018-02-12 | 2018-05-22 | 沈阳鑫博工业技术股份有限公司 | A kind of preparation facilities and method for producing aluminium oxide lime |
| CN108164161A (en) * | 2018-03-07 | 2018-06-15 | 中国中材国际工程股份有限公司 | A kind of extra light calcined magnesia suspended state calcination system and preparation method of magnesia |
| CN108502909A (en) * | 2018-06-19 | 2018-09-07 | 郑小华 | A kind of powdery highly active calcium oxide and its production technology |
| CN109467323A (en) * | 2019-01-15 | 2019-03-15 | 王誓学 | Lime suspension calcining process equipment |
| CN109836059A (en) * | 2019-04-04 | 2019-06-04 | 南京凯盛国际工程有限公司 | A kind of transformation cement kiln lime production device and method |
| CN109836060A (en) * | 2019-04-04 | 2019-06-04 | 南京凯盛国际工程有限公司 | A kind of powdered lime calcining and decomposing preparation system |
| CN109896760A (en) * | 2019-04-04 | 2019-06-18 | 南京凯盛国际工程有限公司 | A kind of device and technique using cement kiln end lime burning |
| CN112479606A (en) * | 2020-12-10 | 2021-03-12 | 石家庄新华能源环保科技股份有限公司 | Suspension kiln for producing lime |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114249547A (en) * | 2020-09-24 | 2022-03-29 | 合肥丰达水泥科技有限公司 | Kiln-free calcination process for producing powdery active lime |
| CN114956610A (en) * | 2022-05-20 | 2022-08-30 | 南京乐巨国际工程有限公司 | Carbide slag suspension calcining system |
| CN116903272A (en) * | 2023-08-30 | 2023-10-20 | 浙江钙科科技股份有限公司 | Powder lime suspension calcination system with preheating and dispersing functions |
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| CN101987783A (en) * | 2010-08-27 | 2011-03-23 | 莱芜钢铁股份有限公司 | Method for producing active pulverized lime by utilizing coal gas to calcine limestone through suspended state pre-heating decomposing furnace |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101987783A (en) * | 2010-08-27 | 2011-03-23 | 莱芜钢铁股份有限公司 | Method for producing active pulverized lime by utilizing coal gas to calcine limestone through suspended state pre-heating decomposing furnace |
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2593396C1 (en) * | 2015-03-17 | 2016-08-10 | Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Method of obtaining lime |
| CN105906223A (en) * | 2016-06-02 | 2016-08-31 | 浙江钙科机械设备有限公司 | Lime powder suspension calcining production line and suspension calcining process thereof |
| CN106587667A (en) * | 2016-12-28 | 2017-04-26 | 柳州市昌泉贸易有限公司 | Method for producing active lime powder by calcining limestone |
| CN106630690A (en) * | 2016-12-28 | 2017-05-10 | 柳州市昌泉贸易有限公司 | Method for producing high-activity lime through vacuum calcination |
| CN106673463A (en) * | 2016-12-28 | 2017-05-17 | 柳州市昌泉贸易有限公司 | Production method of high-activity lime |
| CN106630690B (en) * | 2016-12-28 | 2019-06-18 | 柳州市昌泉贸易有限公司 | A kind of method of vacuum calcining production active lime |
| CN106587667B (en) * | 2016-12-28 | 2019-05-03 | 柳州市昌泉贸易有限公司 | A kind of method of calcined limestone production active lime powder |
| CN106673463B (en) * | 2016-12-28 | 2019-05-03 | 柳州市昌泉贸易有限公司 | A kind of active lime production method |
| CN107226627A (en) * | 2017-07-10 | 2017-10-03 | 合肥水泥研究设计院 | A kind of two grades of suspension calcining devices of active powder lime |
| CN107698179A (en) * | 2017-12-01 | 2018-02-16 | 河南中蓝新材料科技有限公司 | A kind of strength gaseous suspension cooling means for being used to produce powdery active lime system |
| CN107759115A (en) * | 2017-12-12 | 2018-03-06 | 泰安中意重型工业设备有限公司 | The new process for calcining and device of a kind of powdered lime |
| CN107963629A (en) * | 2017-12-26 | 2018-04-27 | 神雾环保技术股份有限公司 | A kind of calcium carbide production process raw material preheating system and its application process |
| CN108059369A (en) * | 2018-02-12 | 2018-05-22 | 沈阳鑫博工业技术股份有限公司 | A kind of preparation facilities and method for producing aluminium oxide lime |
| CN108164161A (en) * | 2018-03-07 | 2018-06-15 | 中国中材国际工程股份有限公司 | A kind of extra light calcined magnesia suspended state calcination system and preparation method of magnesia |
| CN108502909A (en) * | 2018-06-19 | 2018-09-07 | 郑小华 | A kind of powdery highly active calcium oxide and its production technology |
| CN109467323A (en) * | 2019-01-15 | 2019-03-15 | 王誓学 | Lime suspension calcining process equipment |
| CN109467323B (en) * | 2019-01-15 | 2023-11-21 | 王誓学 | Lime suspension calcination process equipment |
| CN109836060A (en) * | 2019-04-04 | 2019-06-04 | 南京凯盛国际工程有限公司 | A kind of powdered lime calcining and decomposing preparation system |
| CN109836059A (en) * | 2019-04-04 | 2019-06-04 | 南京凯盛国际工程有限公司 | A kind of transformation cement kiln lime production device and method |
| CN109896760A (en) * | 2019-04-04 | 2019-06-18 | 南京凯盛国际工程有限公司 | A kind of device and technique using cement kiln end lime burning |
| CN114249547A (en) * | 2020-09-24 | 2022-03-29 | 合肥丰达水泥科技有限公司 | Kiln-free calcination process for producing powdery active lime |
| CN114249547B (en) * | 2020-09-24 | 2022-07-05 | 合肥丰达水泥科技有限公司 | Kiln-free calcination process for producing powdery active lime |
| CN112479606A (en) * | 2020-12-10 | 2021-03-12 | 石家庄新华能源环保科技股份有限公司 | Suspension kiln for producing lime |
| CN114011834A (en) * | 2021-10-15 | 2022-02-08 | 江苏中圣园科技股份有限公司 | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system |
| CN114956610A (en) * | 2022-05-20 | 2022-08-30 | 南京乐巨国际工程有限公司 | Carbide slag suspension calcining system |
| CN116903272A (en) * | 2023-08-30 | 2023-10-20 | 浙江钙科科技股份有限公司 | Powder lime suspension calcination system with preheating and dispersing functions |
| CN116903272B (en) * | 2023-08-30 | 2024-04-05 | 浙江钙科科技股份有限公司 | Powder lime suspension calcination system with preheating and dispersing functions |
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| CN103387347B (en) | 2015-01-28 |
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