CN103335514A - Rotary kiln device provided with energy recovery equipment - Google Patents

Rotary kiln device provided with energy recovery equipment Download PDF

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Publication number
CN103335514A
CN103335514A CN2013102207331A CN201310220733A CN103335514A CN 103335514 A CN103335514 A CN 103335514A CN 2013102207331 A CN2013102207331 A CN 2013102207331A CN 201310220733 A CN201310220733 A CN 201310220733A CN 103335514 A CN103335514 A CN 103335514A
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China
Prior art keywords
energy recovery
rotary kiln
kiln
rotary
heat exchanger
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Pending
Application number
CN2013102207331A
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Chinese (zh)
Inventor
贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Priority to CN2013102207331A priority Critical patent/CN103335514A/en
Publication of CN103335514A publication Critical patent/CN103335514A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a rotary kiln device provided with energy recovery equipment, which comprises two rotary kilns, a cooler, one or two heat accumulators, charging systems, a discharging system, air blowers, a cooling fan and an exhaust emission system, and is provided with the energy recovery equipment, wherein the energy recovery equipment is formed by defining steel plates or coil pipes outside the rotary kilns, and is provided with a fixed structure; sliding seal pieces are arranged at the two heads of the energy recovery equipment; the energy recovery equipment is in rotary seal with the rotary kilns by the sliding seal pieces; the heat accumulators are in sleeve structures, and comprise outer barrels and inner barrels; annular spaces are formed between the outer barrels and the inner barrels; the lower parts of the annular spaces are connected with the rotary kilns by kiln heads; the heat accumulators are provided with 2-10 material pushing machines; and the material pushing machines are provided with material pushing plates. The device recovers heat emitted by outer walls of the rotary kilns with the energy recovery equipment to preheat fuel gas, and preheats processed materials and air with flue gas and decomposition gas generated by material decomposition, so that a combustion temperature is raised, the waste heat is fully used, the energy consumption and the production cost are reduced, and economic benefits are improved.

Description

A kind of device of the rotary kiln with apparatus for energy recovery
Technical field
The invention belongs to the industrial furnace technical field, relate to a kind of rotary kiln, be specifically related to a kind of device of the rotary kiln with apparatus for energy recovery.
Background technology
Rotary kiln refers to rotary calcining kiln, and wherein lime rotary kiln is to use the kiln of calcining more widely small particles material, is applicable to being applied to the manufacturing enterprises such as iron and steel, calcium carbide chemical industry, non-ferrous metal.Lime rotary kiln can dinectly bruning 10-40mm fine fraction raw material limestone or light dolomite, there are the characteristics such as adaptability to raw material is good, output is large, product is even, activity degree is high, production operation is stable.Lime rotary kiln is simple in structure, and air-flow is unobstructed, and sulfur-containing smoke gas can be discharged in time, and the sulphur in fuel is difficult for adhering to, thereby calcining finished product sulfur content is low, and purity is high, meets the quality requirement of finished product.Both along the circumferential direction rollings of material simultaneously, move again vertically, are heated evenly, and the burner easy control of temperature, burning quality is good, more than Product Activity Du Keda 360mL.
But, because the lime rotary kiln energy consumption is large, seriously restrict popularization and the development of lime rotary kiln.The Chinese invention patent that application number is 200920227150.0 discloses a kind of " calcination system of energy-saving rotary kiln ", and in this patent, " the calcined by rotary kiln system comprises rotary kiln, and fuel gas advances from the rotary kiln low side, brings out from rotary kiln is high; Raw material advances from rotary kiln is high-end, brings out from rotary kiln is low, and it is characterized in that: rotary kiln is high-end to communicate with a heat recovery chamber, and this heat recovery chamber inside is provided with the feeding preheating pipe communicated with rotary kiln, and raw material enters rotary kiln after the preheating of feeding preheating pipe.So design, raw material is before entering rotary kiln, and drying heats up.”。But by the economizer bank preheating material, recover energy limited in this patent, using energy source also has larger space, this device can not reclaim the heat of rotary kiln outer wall loss simultaneously, with other kiln types, compare, it is great that the rotary kiln wall energy loss accounts for the ratio of total power consumption, the rotary kiln of this patent is single rotary kiln in addition, is unfavorable for expanding production capacity.
Summary of the invention
The purpose of this invention is to provide a kind of device of the rotary kiln with apparatus for energy recovery, utilize apparatus for energy recovery and storage heater to combine, take full advantage of waste heat preheating material to be machined and air that flue gas and material decompose the decomposition gas produced, rotary kiln outer wall liberated heat pre-heating fuel, thereby the reduction energy consumption, increase economic efficiency.
The present invention, with the rotary kiln device of apparatus for energy recovery, comprises two rotary kilns, cooler, one or two storage heaters, feeding system, discharge system, air blast, cooling blower and exhaust emission systems.Rotary kiln is provided with kiln hood, and kiln hood is provided with burner.Two rotary kilns are connected with cooler by the kiln hood, and cooler is connected with discharge system, and cooling blower is connected with cooler.The top material mouthful of storage heater is connected with feeding system by inlet valve.The gas port of storage heater is connected with exhaust emission system with air blast respectively by triple valve.The rotary kiln device is provided with apparatus for energy recovery, and apparatus for energy recovery is formed in rotary kiln outer peripheral system by steel plate or coil pipe.Apparatus for energy recovery is fixed structure, and two is provided with sliding seal, and apparatus for energy recovery is by sliding seal and rotary kiln rotary seal.Storage heater is telescoping structure, comprises urceolus and inner core, between urceolus and inner core, is annular space, and the bottom of annular space is connected with rotary kiln by kiln hood.Storage heater is provided with 2~10 pushers, and pusher is with scraping wings.
The apparatus for energy recovery formed by the coil pipe system of enclosing is provided with gas entry and gas exit, and gas entry is connected with gaspipe line, and gas exit is connected with burner.Apparatus for energy recovery inside is provided with the flow-disturbing blower fan.
Rotary kiln device with apparatus for energy recovery is provided with heat exchanger and circulating fan, and heat exchanger is provided with air pipe line and gaspipe line, and the apparatus for energy recovery formed by the steel plate system of enclosing is provided with air intake and air outlet slit.Air outlet slit is connected to the air pipe line entrance of heat exchanger, and the outlet of heat exchanger air pipe line is connected to the circulating fan entrance, and the circulating fan outlet is connected to the air intake of apparatus for energy recovery.Heat exchanger coal pipeline entrance is connected with the cooled coal gas pipeline, and outlet is connected with burner.Heat exchanger is shell-and-tube heat exchanger or coil exchanger.Storage heater is provided with dividing plate, and dividing plate is divided into two parts by storage heater, and two rotary kilns share a storage heater.One of rotary kiln is connected with cooler by the kiln hood, and other end is connected with storage heater by kiln hood, and two rotary kilns share a storage heater.
The inner core top of storage heater is cone structure, and centre is cylindrical structure.Two rotary kilns are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood.
Rotary kiln device with apparatus for energy recovery is used for calcined limestone and dolomite .apparatus for energy recovery also can be applied on common rotary kiln, the predecomposition rotary kiln of using as cement plant, or the shaft preheater lime rotary kiln used of Lime Factory.Rotary kiln both can be used for lime burning, also can be used for producing clinker, produce clinker as be used for, the raw material of ball processed is added by the shaft preheater top, powder sprays into by the powder spout that is arranged on kiln hood, the grog burnt till goes out device after subcooler is cooling, and rotary kiln can also be used for producing the multiple uses such as reduced iron.The rotary kiln energy recycle device also can be applied on common rotary kiln, the predecomposition rotary kiln of using as cement plant, or the shaft preheater lime rotary kiln used of Lime Factory.
The present invention is with the rotary kiln device of apparatus for energy recovery, by the outer setting apparatus for energy recovery at rotary kiln, and the heat pre-heating fuel gas of outer wall bulk storage while utilizing apparatus for energy recovery to reclaim rotary kiln running; Pass through storage heater, the flue gas and the material that utilize calcination process to produce decompose the decomposition gas preheating material to be machined produced, material to be machined preheated air after the recycling pre-heating temperature elevation, thereby improved ignition temperature, take full advantage of the waste heat of calcined by rotary kiln material process, reduce energy consumption and lime production cost, improved economic benefit.Storage heater adopts sleeve parallel type structure, and heat-transfer effect is good, is conducive to the even preheating of material to be machined.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention with the rotary kiln device of apparatus for energy recovery;
The schematic diagram that Fig. 2 is another embodiment of the present invention.
Wherein: 1-triple valve, 2-feeding system, 3-inlet valve, 4-storage heater, 5-pusher, 6-scraping wings, 7-kiln hood, 8-burner, 9-air blast, 10-flow-disturbing blower fan, 11-coil pipe, 12-rotary kiln, 13-kiln hood, 14-sliding seal, 15-gas exit, 16-gas entry, 17-cooling blower, 18-cooler, 19-discharge system, 20-valve, 21-apparatus for energy recovery outer wall, 22-air outlet slit, 23-air intake, 24-circulating fan, 25-heat exchanger, 26-inner core, 27-annular space, 28-apparatus for energy recovery.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment 1
The present invention is with the rotary kiln device of apparatus for energy recovery, as shown in Figure 1, comprise two rotary kilns 12, cooler 18, two storage heaters 4, feeding system 2, discharge system 19, air blast 9, cooling blower 17, apparatus for energy recovery 28 and exhaust emission systems.Rotary kiln is provided with kiln hood 7, and kiln hood is provided with burner 8.Two rotary kilns are connected with cooler by kiln hood 13, are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood.Cooler is connected with discharge system, and cooling blower is connected with cooler.The top material mouthful of storage heater is connected with feeding system by inlet valve 3, and the top gas port of storage heater is connected with exhaust emission system with air blast 9 respectively by triple valve 1.Apparatus for energy recovery is formed in rotary kiln outer peripheral system by coil pipe 11, and inside is provided with flow-disturbing blower fan 10.Apparatus for energy recovery is fixed structure, and two is provided with sliding seal 14, and apparatus for energy recovery is by sliding seal and rotary kiln rotary seal.Storage heater is telescoping structure, comprises urceolus and inner core 26, between urceolus and inner core, is annular space 27, and the bottom of annular space is connected with rotary kiln by kiln hood.Inner core top is cone structure, and centre is cylindrical structure.Storage heater is provided with 6 pushers 5, and pusher is with scraping wings 6.Apparatus for energy recovery is provided with gas entry 16 and gas exit 15, and gas entry is connected with gaspipe line, and gas exit is connected with burner 8, and connecting line is provided with valve 20.
The present invention with the running of the rotary kiln device of apparatus for energy recovery is, the lime stone raw material enters storage heater 4 through left side feeding system 2, and the cone by inner core 26 tops is evenly distributed on annular space 27.The flue gas of being come by rotary kiln 12 enters the annular space of storage heater 4 through kiln hood 7, the raw material in storage heater is carried out to preheating.Lime stone raw material after preheating pushes kiln hood 7 by pusher 5, enters left side rotary kiln 12 through kiln hood and is calcined.Lime after calcining is through kiln hood 13 to cooler 18, and the cooling air of being sent by cooling blower 17 carries out cooling to the high temperature lime in cooler, and cooled lime goes out device through discharging opening and discharge system 19.The gas method of operation be the air that bloats of air blast 9 through triple valve 1 to the right side storage heater, in storage heater, be preheated, heat is from the raw material after being preheated, and the cooled coal gas that the cooled coal gas pipeline is come enters coil pipe through gas entry 16, and the coal gas after preheating enters burner through gas exit 15, valve 20.Flow by flow-disturbing blower fan 10 strengthening apparatus for energy recovery 28 internal gas, improve heat transfer efficiency.Coal gas after preheating and combustion air enter the right side rotary kiln and are burnt after kiln hood mixes, limestone material in the rotary kiln of right side is calcined, flue gas and decomposition gas that burning produces mix with the gas of cooler cool lime through the kiln hood together, mist is through left side rotary kiln, kiln hood and left side storage heater preheating limestone material accumulation of heat, the flue gas of emitting after heat enters into exhaust emission system through triple valve 1, and the temperature of fume emission is lower than 150 ℃.According to both sides fume emission design temperature, the both sides rotary kiln hockets and calcines and preheating, the hocket accumulation of heat and emit the heat preheated air of both sides storage heater, the action by triple valve, valve 20 and inlet valve 3 realizes alternate run, the design temperature of fume emission is 150 ℃.
Embodiment 2
As shown in Figure 2, device is provided with heat exchanger 25 and circulating fan 24 to another embodiment of the present invention, and heat exchanger is coil exchanger, and heat exchanger is provided with air pipe line and fuel gas pipeline.Apparatus for energy recovery 28 is formed by the steel plate system of enclosing, and is provided with air intake 23 and air outlet slit 22.Air outlet slit is connected to the air pipe line entrance of heat exchanger, and the outlet of heat exchanger air pipe line is connected to the circulating fan entrance, and the circulating fan outlet is connected to the air intake of apparatus for energy recovery.Heat exchanger fuel gas pipeline entrance is connected with the cooled coal gas pipeline, and outlet is connected with burner 8.Enter heat exchanger by the combustion air after the apparatus for energy recovery preheating through air outlet slit 22 and heat exchanger air pipe line entrance, with the cooled coal gas heat exchange, by an air pipe line outlet minute two-way, translateral circulating fan 24, air intake 23 enter both sides rotary kiln apparatus for energy recovery respectively.Realize that by circulating fan 24 air circulates between apparatus for energy recovery and heat exchanger.Cooled coal gas enters burner 8 burnings in the shell side preheating of heat exchanger by valve 20.Miscellaneous equipment and operation are identical with embodiment 1.

Claims (8)

1. the device of the rotary kiln with apparatus for energy recovery, comprise two rotary kilns (12), cooler (18), one or two storage heaters (4), feeding system (2), discharge system (19), air blast (9), cooling blower (17) and exhaust emission system, described rotary kiln is provided with kiln hood (7), and kiln hood is provided with burner (8); Two rotary kilns are connected with cooler by kiln hood (13), and cooler is connected with discharge system, and cooling blower is connected with cooler; The top material mouthful of described storage heater is connected with feeding system by inlet valve (3); The top gas port of described storage heater (4) is connected with exhaust emission system with air blast (9) respectively by triple valve (1), it is characterized in that: described rotary kiln device is provided with apparatus for energy recovery (28), and described apparatus for energy recovery is formed in rotary kiln outer peripheral system by steel plate or coil pipe (11); Described apparatus for energy recovery is fixed structure, and two is provided with sliding seal (14), and apparatus for energy recovery is by sliding seal and rotary kiln rotary seal; Described storage heater is telescoping structure, comprises urceolus and inner core (26), between urceolus and inner core, is annular space (27), and the bottom of described annular space is connected with rotary kiln by kiln hood; Described storage heater is provided with 2~10 pushers (5), and pusher is with scraping wings (6).
2. the device of the rotary kiln with apparatus for energy recovery according to claim 1, it is characterized in that: the described apparatus for energy recovery (28) formed by coil pipe (11) system of enclosing is provided with gas entry (16) and gas exit (15), gas entry is connected with gaspipe line, and gas exit is connected with burner (8).
3. the device of the rotary kiln with apparatus for energy recovery according to claim 2, it is characterized in that: described apparatus for energy recovery (28) inside is provided with flow-disturbing blower fan (10).
4. the device of the rotary kiln with apparatus for energy recovery according to claim 1, it is characterized in that: described device is provided with heat exchanger (25) and circulating fan (24), and described heat exchanger is provided with air pipe line and blast tube; The described apparatus for energy recovery (28) formed by the steel plate system of enclosing is provided with air intake (23) and air outlet slit (22); Described air outlet slit is connected to the air pipe line entrance of heat exchanger, and the outlet of heat exchanger air pipe line is connected to the circulating fan entrance, and the circulating fan outlet is connected to air intake; Heat exchanger gaspipe line entrance is connected with the cooled coal gas pipeline, and outlet is connected with burner (8).
5. the device of the rotary kiln with apparatus for energy recovery according to claim 4, it is characterized in that: described heat exchanger (25) is shell-and-tube heat exchanger or coil exchanger.
6. the device of the rotary kiln with apparatus for energy recovery according to claim 1, it is characterized in that: described storage heater (4) is provided with dividing plate, and dividing plate is divided into two parts by storage heater; One of described rotary kiln (12) is connected with cooler (18) by kiln hood (13), and other end is connected with storage heater by kiln hood (7).
7. according to the described device of the rotary kiln with apparatus for energy recovery of claim 1~6 any one, it is characterized in that: described inner core (26) top is cone structure, and centre is cylindrical structure.
8. according to the described device of the rotary kiln with apparatus for energy recovery of claim 1~6 any one, it is characterized in that: described two rotary kilns (12) are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood (13).
CN2013102207331A 2013-06-05 2013-06-05 Rotary kiln device provided with energy recovery equipment Pending CN103335514A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557694A (en) * 2013-11-06 2014-02-05 武汉科技大学 Necking-type rotary kiln for vanadium extraction of stone coal
CN104016596A (en) * 2014-05-27 2014-09-03 石家庄新华能源环保科技股份有限公司 Rotary kiln with power generation device
WO2016150100A1 (en) * 2015-03-24 2016-09-29 石家庄新华能源环保科技股份有限公司 Heat-accumulating lime rotary kiln
CN111548036A (en) * 2020-05-18 2020-08-18 郑州三迪建筑科技有限公司 Method for utilizing waste heat generated by calcining phosphogypsum

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2811901Y (en) * 2005-08-11 2006-08-30 北京东方能汇能源工程技术有限公司 Cement rotary kiln body with surface heat energy recovery device
JP4126397B2 (en) * 2000-05-16 2008-07-30 株式会社明電舎 Rotary heat treatment equipment
CN201514102U (en) * 2009-09-22 2010-06-23 山东奥鹏工贸有限公司 Calcination system of energy-saving rotary kiln
CN102875036A (en) * 2012-10-24 2013-01-16 石家庄市新华工业炉有限公司 Heat storage type lime rotary kiln
CN202792923U (en) * 2012-07-30 2013-03-13 四川川润动力设备有限公司 Spiral heat exchange device for rotary kiln
CN203478938U (en) * 2013-06-05 2014-03-12 石家庄新华能源环保科技股份有限公司 Rotary kiln apparatus with energy recovery equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4126397B2 (en) * 2000-05-16 2008-07-30 株式会社明電舎 Rotary heat treatment equipment
CN2811901Y (en) * 2005-08-11 2006-08-30 北京东方能汇能源工程技术有限公司 Cement rotary kiln body with surface heat energy recovery device
CN201514102U (en) * 2009-09-22 2010-06-23 山东奥鹏工贸有限公司 Calcination system of energy-saving rotary kiln
CN202792923U (en) * 2012-07-30 2013-03-13 四川川润动力设备有限公司 Spiral heat exchange device for rotary kiln
CN102875036A (en) * 2012-10-24 2013-01-16 石家庄市新华工业炉有限公司 Heat storage type lime rotary kiln
CN203478938U (en) * 2013-06-05 2014-03-12 石家庄新华能源环保科技股份有限公司 Rotary kiln apparatus with energy recovery equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557694A (en) * 2013-11-06 2014-02-05 武汉科技大学 Necking-type rotary kiln for vanadium extraction of stone coal
CN104016596A (en) * 2014-05-27 2014-09-03 石家庄新华能源环保科技股份有限公司 Rotary kiln with power generation device
WO2016150100A1 (en) * 2015-03-24 2016-09-29 石家庄新华能源环保科技股份有限公司 Heat-accumulating lime rotary kiln
CN111548036A (en) * 2020-05-18 2020-08-18 郑州三迪建筑科技有限公司 Method for utilizing waste heat generated by calcining phosphogypsum

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Application publication date: 20131002