CN107324671A - A kind of pair of bore type lime shaft kiln - Google Patents

A kind of pair of bore type lime shaft kiln Download PDF

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Publication number
CN107324671A
CN107324671A CN201710522135.8A CN201710522135A CN107324671A CN 107324671 A CN107324671 A CN 107324671A CN 201710522135 A CN201710522135 A CN 201710522135A CN 107324671 A CN107324671 A CN 107324671A
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CN
China
Prior art keywords
kiln
shaft
circular passage
flue gas
zone
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.)
Pending
Application number
CN201710522135.8A
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Chinese (zh)
Inventor
贾鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Ke Laipu Energy Technology Co Ltd
Original Assignee
Shanghai Ke Laipu Energy Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Ke Laipu Energy Technology Co Ltd filed Critical Shanghai Ke Laipu Energy Technology Co Ltd
Priority to CN201710522135.8A priority Critical patent/CN107324671A/en
Publication of CN107324671A publication Critical patent/CN107324671A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00Lime, magnesia or dolomite
    • C04B2/10Preheating, burning calcining or cooling
    • C04B2/12Preheating, burning calcining or cooling in shaft or vertical furnaces
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The present invention relates to a kind of pair of bore type lime shaft kiln, including two shaft furnaces set up, it is divided into preheating zone, burning zone and cooling zone inside the kiln body of shaft furnace.The top of preheating zone is provided with waste gas outlet, and the bottom of cooling zone is provided with discharging opening and cooling air inlet, and kiln body top is provided with burner.Shaft furnace is provided with circular passage, and circular passage is located between burning zone and cooling zone, and circular passage is fixedly mounted on the outside of kiln body by channel support.Shaft kiln is provided with inside flue gas mouthful, kiln body to be connected by flue gas mouthful with circular passage.Double bore type lime shaft kilns are provided with flue gas interface channel, and the circular passage of two shaft furnaces is connected by flue gas interface channel.The present invention realizes parallel type calcined limestone, improves the thermal efficiency in limekiln, advantageously reduce the energy consumption of lime production by adding circular passage between the burning zone and cooling zone of shaft furnace and flue gas interface channel being set between the circular passage of two shaft furnaces.

Description

A kind of pair of bore type lime shaft kiln
Technical field
The invention belongs to industrial furnace technical field, it is related to a kind of limekiln, and in particular to a kind of pair of bore type lime shaft kiln.
Background technology
Lime is important construction material, is also the metallurgical, important source material of chemical field, prior art be with dolomite, Lime stone is raw material, using the shaft furnace lime burning with burning beam.The deficiency of so process is:The direction that furnace gas flows in shaft furnace With building stones flow it is in opposite direction, i.e., building stones are run from the top down, and furnace gas flows from bottom to top, and the air resistances of building stones is big, are held Easily there is spot segregation phenomenon, cause lime stone to be heated uneven, influence product quality.
Double thorax kilns are also known as double thorax cocurrent heat accumulating type limekilns, and fuel enters from burning zone upper end, and with raw material cocurrent.Due to Fuel is sprayed into from burning zone top, and raw material can absorb the heat that most of fuel is discharged, and the temperature of burning zone here 950 DEG C of average out to.Double another important feature of thorax kiln are accumulation of heats, and building stones are preheated using waste heat.Cocurrent is calcined and adverse current accumulation of heat Thermal characteristics determines that double thorax kiln furnitures have the very high thermal efficiency, and its thermal energy consumption is in all types lime such as rotary kiln, sleeve kiln It is minimum in kiln.It is completed existing or discarded lime shaft kiln, by technological improvement, reconstructs thorax cocurrent kiln in pairs, can not only carry The thermal efficiency in high limekiln, and be conducive to repairing the old and utilizing scraps, save calciner investment.
The content of the invention
It is an object of the invention to provide a kind of pair of bore type lime shaft kiln, using existing lime shaft kiln technological transformation into cocurrent Formula limekiln, improves the efficiency in limekiln, reduces the energy consumption of lime production.
The technical scheme is that:It is divided into preheating inside double bore type lime shaft kilns, including two shaft furnaces, the kiln body of shaft furnace Band, burning zone and cooling zone.The top of preheating zone is provided with waste gas outlet, and the bottom of cooling zone enters provided with discharging opening and cooling wind Mouthful, kiln body top is provided with burner.Shaft furnace is provided with circular passage, and circular passage is located between burning zone and cooling zone, circular passage The outside of kiln body is fixedly mounted on by channel support.Shaft kiln provided with flue gas mouthful, inside kiln body kiln gas by flue gas mouthful with Circular passage is connected.Double bore type lime shaft kilns are provided with flue gas interface channel, and the circular passage of two shaft furnaces connects logical by flue gas Road is connected.
Shaft kiln is per side provided with 1~10 layer of flue gas mouthful, and every layer provided with 2~10 flue gases mouthful.Burner is plug-in type burner. Waste gas outlet is connected by triple valve with exhaust emission system, and exhaust emission system includes deduster, air-introduced machine and chimney.It is described Shaft furnace is beam type kiln, periphery burner kiln or multifuel combustion kiln.
Double bore type lime shaft kilns of the invention are the improvement on the basis of existing shaft furnace, are inserted by being set on the top of shaft furnace Enter formula burner, circular passage is added between the burning zone and cooling zone of shaft furnace and flue gas is set between the circular passage of two shaft furnaces Interface channel, realizes that parallel type is calcined, improves the efficiency in limekiln, advantageously reduce the energy consumption of lime production.Existing old Lime shaft kiln on the basis of be transformed into and double thorax streaming limekilns, upgrading is utilized, and construction cost is low, is a calciner upgrading The effective way of the replacement.
Brief description of the drawings
Fig. 1 is the structural representation of the double bore type lime shaft kilns of the present invention;
Fig. 2 is Fig. 1 circular passage cross-sectional view.
Wherein:1-waste gas outlet, 2-burner, 3-channel support, 4-circular passage, 5-flue gas mouth, 6-cooling air inlet, 7-discharging opening, 8-flue gas interface channel, 9-shaft furnace, 10-preheating zone, 11-burning zone, 12-cooling zone.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in detail.The scope of the present invention is not limited to embodiment, Those skilled in the art make any change in the range of claim restriction and fall within the scope of protection of the invention.
Bore type lime shaft kilns of the invention double are as shown in figure 1, including two shaft furnaces 9, apparatus for feeding, fuel feed system, go out Expect equipment, air feed system, control system and exhaust emission system, air feed system includes cooling blower and combustion fan.Shaft furnace It is divided into preheating zone 10, burning zone 11 and cooling zone 12 inside kiln body, the top of preheating zone is provided with waste gas outlet 1.Under cooling zone Portion is provided with discharging opening 7 and cooling air inlet 6, and discharging opening is connected with discharging equipment, and cooling air inlet is connected with cooling blower.Kiln body Top is provided with burner 2, and burner is plug-in type gaseous fuel burner.The fuel inlet of burner is supplied by triple valve and gaseous fuel System is connected, and combustion air entrance is connected by triple valve with combustion fan.Shaft furnace is provided with circular passage 4, and circular passage, which is located at, forges Burn between band and cooling zone, circular passage is fixedly mounted on the outside of kiln body by channel support 3.As shown in Fig. 2 shaft furnace is side Tee section, kiln body is sideways provided with 1 layer of flue gas mouthful 5, and each side, which is provided with inside 3 flue gases mouthful, kiln body, passes through flue gas mouthful and annular Passage is connected.Double bore type lime shaft kilns are provided with flue gas interface channel 8, and the circular passage of two shaft furnaces is connected by flue gas interface channel It is logical.
The running of double bore type lime shaft kilns of the invention is that lime stone is added from kiln top, is flowed downward.Two shaft furnaces 9 Alternately calcine and preheat, during the shaft furnace calcining in left side, fuel gas and combustion air enter insertion burner, and burner 2 sprays fuel The limestone material in the Shaft kiln of burning calcining left side is carried out with combustion air, cooling zone cooling is advanced into after calcining under lime, Lime input and output material equipment kiln discharge after cooling.Flue gas mouthful 5 of being passed through after burning under flue gas enters circular passage 4.Wind is cooled down through cooling down wind Cooling wind after being heated up after the lime that entrance 6 enters after cooling zone cooling calcining, cool lime enters circular passage, with flue gas Converge the circular passage for entering right side shaft furnace through flue gas interface channel 8.The mixed gas flue gas through right side shaft furnace mouthful 5 enters right side The cooling wind of shaft furnace, high-temperature gas mixture body and right side shaft furnace converges and run up the lime stone of preheating zone in the shaft furnace of preheating right side Low temperature waste gas after material, preheating material is discharged through the exhaust emission system of right side shaft furnace waste gas outlet 1, now right side shaft furnace burner It is closed.Shaft furnace is positive pressure operation on the left of double bore type lime shaft kilns, and right side shaft furnace is negative-pressure operation, is taken out by air-introduced machine Go out the waste gas formation negative pressure of right side shaft furnace.Run one it is intersegmental commutated every rear, left side shaft furnace preheating lime stone material, right side erect Kiln is calcined, and by control system Automated condtrol, switch operation is realized by the action of triple valve.

Claims (5)

1. a kind of pair of bore type lime shaft kiln, including two shaft furnaces(9), it is divided into preheating zone inside the kiln body of the shaft furnace(10), forge Burn band(11)And cooling zone(12), the top of the preheating zone is provided with waste gas outlet(1), the bottom of the cooling zone is provided with discharging Mouthful(7)And cooling air inlet(6), kiln body top is provided with burner(2), it is characterized in that:The shaft furnace is provided with circular passage(4), institute State circular passage to be located between burning zone and cooling zone, circular passage passes through channel support(3)It is fixedly mounted on the outside of kiln body; The Shaft kiln is provided with flue gas mouthful(5), kiln gas is connected by flue gas mouthful with circular passage inside kiln body;Described pair of bore type lime Shaft furnace is provided with flue gas interface channel(8), the circular passage of two shaft furnaces is connected by flue gas interface channel.
2. according to claim 1 pair of bore type lime shaft kiln, it is characterized in that:The Shaft kiln is provided with 1~10 layer per side Flue gas mouthful(5), every layer provided with 2~10 flue gases mouthful.
3. according to claim 1 pair of bore type lime shaft kiln, it is characterized in that:The burner(2)It is described for plug-in type burner Plug-in type burner is solid fuel burner, liquid fuel burner or gaseous fuel burner.
4. according to claim 1 pair of bore type lime shaft kiln, it is characterized in that:The waste gas outlet(1)By triple valve with Exhaust emission system is connected.
5. according to claim 1 pair of bore type lime shaft kiln, it is characterized in that:The shaft furnace is beam type kiln, periphery burner kiln Or multifuel combustion kiln.
CN201710522135.8A 2017-06-30 2017-06-30 A kind of pair of bore type lime shaft kiln Pending CN107324671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710522135.8A CN107324671A (en) 2017-06-30 2017-06-30 A kind of pair of bore type lime shaft kiln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710522135.8A CN107324671A (en) 2017-06-30 2017-06-30 A kind of pair of bore type lime shaft kiln

Publications (1)

Publication Number Publication Date
CN107324671A true CN107324671A (en) 2017-11-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710522135.8A Pending CN107324671A (en) 2017-06-30 2017-06-30 A kind of pair of bore type lime shaft kiln

Country Status (1)

Country Link
CN (1) CN107324671A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302675A (en) * 2020-04-27 2020-06-19 垣曲县五龙镁业有限责任公司 Method and system for calcining dolomite in heat accumulating type energy-saving double-hearth shaft kiln
CN111302675B (en) * 2020-04-27 2021-11-09 垣曲县五龙镁业有限责任公司 Method and system for calcining dolomite in heat accumulating type energy-saving double-hearth shaft kiln

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302675A (en) * 2020-04-27 2020-06-19 垣曲县五龙镁业有限责任公司 Method and system for calcining dolomite in heat accumulating type energy-saving double-hearth shaft kiln
CN111302675B (en) * 2020-04-27 2021-11-09 垣曲县五龙镁业有限责任公司 Method and system for calcining dolomite in heat accumulating type energy-saving double-hearth shaft kiln

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