CN103332873A - Parallel-flow heat accumulating type lime rotary kiln - Google Patents
Parallel-flow heat accumulating type lime rotary kiln Download PDFInfo
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- CN103332873A CN103332873A CN2013102205374A CN201310220537A CN103332873A CN 103332873 A CN103332873 A CN 103332873A CN 2013102205374 A CN2013102205374 A CN 2013102205374A CN 201310220537 A CN201310220537 A CN 201310220537A CN 103332873 A CN103332873 A CN 103332873A
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- thermophore
- rotary kiln
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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 relates to a parallel-flow heat accumulating type lime rotary kiln. The parallel-flow heat accumulating type lime rotary kiln comprises two rotary kilns, a cooler, one or two heat accumulators, a charging system, a discharging system, an air blower, a cooling air blower and a waste gas exhaustion system, wherein the two rotary kilns are connected with the cooler by a kiln tail cover; and an upper gas port of the heat accumulator is respectively connected with the air blower and the waste gas exhaustion system by a three-way valve. The heat accumulator is of a sleeve type structure including an inner barrel and an outer barrel, wherein the inner barrel and the outer barrel are arranged in a concentric manner; an annular space is formed between the inner barrel and the outer barrel; the lower part of the annular space is connected with the rotary kilns by a kiln head. The heat accumulator is provided with 2-10 material pushers; the lime kiln is provided with 2-20 nozzles, wherein the nozzles are arranged on the connected part of the heat accumulator and the kiln head or are arranged at the kiln head. According to the parallel-flow heat accumulating type lime rotary kiln, the heat accumulator adopts a sleeve parallel-flow type structure which is good in heat transfer effect and beneficial to uniformly pre-heating processed materials. The two rotary kilns are connected with the heat accumulator by the kiln tail cover, so that the roasted materials and the combustion air are preheated, and therefore, the parallel-flow heat accumulating type lime rotary kiln is beneficial to the continuity and stability of lime production and expanding the production capacity.
Description
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 and stream heat accumulating type lime rotary kiln.
Background technology
Rotary kiln refers to rotate calcining kiln, and wherein lime rotary kiln is to use the kiln of calcining small particles material more widely, is fit to be applied to manufacturing enterprises such as iron and steel, calcium carbide chemical industry, non-ferrous metal.Lime rotary kiln can directly be calcined fine fraction raw material limestone or the light dolomite of 10-40mm, has characteristics such as adaptability to raw material is good, output is big, 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 in time be discharged, and the sulfur in the fuel is difficult for adhering to, thereby calcining finished product sulphur content is low, and the purity height meets the specification of quality of finished product; Both rollings along the circumferential direction of material simultaneously, mobile vertically again, be heated evenly, the combustion unit easy control of temperature, burning quality is good, and the product activity degree can reach more than the 360mlL.
But because the lime rotary kiln energy consumption is big, seriously restrict popularization and the development of lime rotary kiln.That application number is that 200920227150.0 Chinese utility model patent discloses is a kind of " energy-conservation calcined by rotary kiln system ", and " the calcined by rotary kiln system comprises rotary kiln, and fuel gas advances from the rotary kiln low side, brings out from the rotary kiln height in this patent; 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 that communicates with rotary kiln, and raw material enters rotary kiln after the preheating of feeding preheating pipe.So design, raw material are before entering rotary kiln, and drying heats up.”。But preheating tube is limited by the preheating material recovered energy in this patent, saves the energy and also has sufficient space, and 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 invention provides a kind of and stream heat accumulating type lime rotary kiln, utilizes two rotary kilns to combine with thermophore, takes full advantage of waste heat preheating material and the air of flue gas, thereby cuts down the consumption of energy, and enlarges lime throughput.
The present invention also flows the heat accumulating type lime rotary kiln, comprises two rotary kilns, water cooler, one or two thermophore, feeding system, discharge system, gas blower, cooling blower and exhaust emission systems.Rotary kiln is provided with kiln hood, and two rotary kilns are connected with water cooler by the kiln hood, and water cooler is connected with discharge system.Thermophore top material mouth is connected with feeding system by feed valve, and thermophore top gas port is connected with exhaust emission system with gas blower respectively by T-valve, and cooling blower is connected with water cooler.Thermophore is telescoping structure, comprises urceolus and inner core, is annular space between urceolus cylindrical shell and the inner core, and the bottom of annular space is connected with rotary kiln by kiln hood.Thermophore is provided with 2～10 pushing devices, and pushing device has pushing plate.The limestone kiln is provided with 2～20 brunched burner nozzles, burner or pass the inner tube installation of thermophore at the connecting portion of thermophore and kiln hood, or be installed in kiln hood.
Lime rotary kiln inner core top is pyramidal structure, and the intermediate cross-section is circular configuration.Two rotary kilns are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood.
Thermophore is provided with dividing plate, and dividing plate is with the thermophore separated into two parts.One of rotary kiln is connected with water cooler by the kiln hood, and the other end is connected with thermophore by kiln hood, and two shared thermophore of rotary kilns are connected with the side that the thermophore dividing plate separates respectively.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
The present invention also flows the heat accumulating type lime rotary kiln, by increasing thermophore, the flue gas and the material that utilize calcination process to produce decompose the decomposition gas preheating material to be machined that produces, material to be machined preheated air behind the recycling pre-heating temperature elevation, improve the temperature of combustion of fuel, thereby take full advantage of waste heat, reduced energy consumption.Thermophore adopts sleeve cocurrent flow type structure, and heat-transfer effect is good, is conducive to the even preheating of material to be machined.By two rotary kilns of kiln hood and thermophore associating, realize that preheating by calcining raw materials and combustion air, is conducive to continuity and stability that lime is produced, expand production capacity.Burner is arranged on the connecting portion of thermophore and kiln hood or is installed in kiln hood, has increased the selectivity of production operation.
Description of drawings
Fig. 1 is the present invention and the structural representation that flows the heat accumulating type lime rotary kiln;
Fig. 2 is the structural representation of another embodiment of the present invention;
Fig. 3 is the structural representation of the third embodiment of the present invention;
Fig. 4 is the A-A figure of Fig. 1;
Fig. 5 is the cross-sectional view of thermophore bottom discharging section among Fig. 3.
Wherein:
1-T-valve, 2-feeding system, 3-feed valve, 4-thermophore, 5-pushing device, 6-pushing plate, 7-burner, 8-kiln hood, 9-valve, 10-gas blower, 11-rotary kiln, 12-kiln hood, 13-dividing plate, 14-cooling blower, 15-water cooler, 16-discharge system, 17-inner core, 18-annular space.
Embodiment
The present invention is described in detail below in conjunction with embodiment and accompanying drawing.
Embodiment 1
The present invention also flows the heat accumulating type lime rotary kiln, as shown in Figure 1, comprises two rotary kilns 11, water cooler 15, two thermophore 4, feeding system 2, discharge system 16, gas blower 10, cooling blower 14 and exhaust emission systems.Two rotary kilns 11 are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood.Rotary kiln is provided with kiln hood, and two rotary kilns are connected with water cooler by kiln hood 12, and water cooler 15 is connected with discharge system, and cooling blower is connected with water cooler 15.Thermophore 4 tops material mouth is connected with feeding system 2 by feed valve 3.Two thermophore 4 are telescoping structure, as shown in Figure 4, comprise urceolus and inner core 17, and inner core 17 tops are pyramidal structure, and the intermediate cross-section is circular configuration.Be annular space 18 between urceolus and the inner core 17, annular space 18 for raw material by and with the space of flue gas or air heat exchange, the bottom of annular space is connected with rotary kiln 11 by kiln hood 8.Thermophore 4 top gas ports are connected with exhaust emission system with gas blower 10 respectively by T-valve 1, and thermophore 4 is provided with 6 pushing devices 5, and pushing device has pushing plate 6, and pushing plate 6 is evenly distributed on the thermophore bottom.The limestone kiln is provided with 6 brunched burner nozzles 7, and the inner core 17 that burner passes thermophore 4 is installed in the connecting portion of thermophore 4 and kiln hood 8, and the entrance of burner 7 is connected with fuel conduit by valve 9.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
The present invention and the operational process that flows the heat accumulating type lime rotary kiln be, the Wingdale raw material enters thermophore 4 through left side feeding system 2, and the cone by inner core 17 tops is evenly distributed on annular space 18.The flue gas of being come by left side rotary kiln 11 enters the annular space of thermophore 4 through kiln hood 8, and the raw material in the thermophore is carried out preheating.Wingdale raw material after the preheating pushes kiln hood 8 by pushing device 5, enters left side rotary kiln 11 through kiln hood 8 and calcines.To water cooler 15, the cooling air of being sent by cooling blower 14 cools off the high temperature lime in the water cooler 15 lime after the calcining through kiln hood 12, and cooled lime goes out device through discharge port and discharge system 16.The gas operation scheme be the air that bloats of right-hand drum blower fan 10 through T-valve 1 to right side thermophore 4, the raw material liberated heat warm-up combustion-supporting air after air is preheated in thermophore.Fuel gas enters burner 7 through right side valve 9, at burner outlet ejection fuel, with the air mixed after the thermophore preheating, entering right side rotary kiln 11 through kiln hood 8 burns, limestone material in the rotary kiln of right side is calcined, flue gas and decomposition gas that burning produces mix through the gas of kiln hood 12 with water cooler 15 cool lime together, continue the preheating limestone material to left side rotary kiln 11, mixed gas is through kiln hood 8 and 4 preheating limestone material and the accumulation of heats of left side thermophore then, emit flue gas behind the heat through T-valve 1 to the exhaust emission system discharging, the temperature of fume emission is lower than 150 ℃.According to both sides fume emission design temperature, both sides rotary kiln 11 hockets and calcines and preheating, hocket accumulation of heat and emit the heat preheated air of both sides thermophore 4, the action by T-valve 1, valve 9 and feed valve 3 realizes alternate run, the design temperature of fume emission is 150 ℃.
Embodiment 2
Another embodiment of the present invention as shown in Figure 2, burner 7 is installed in kiln hood 8, the entrance of burner 7 is connected with fuel conduit by valve 9, the outlet of burner is positioned at kiln hood.Air in thermophore 4 after the preheating mixes with fuel gas at kiln hood 8 and burns.Miscellaneous equipment and operation are identical with embodiment 1.
Embodiment 3
An embodiment more of the present invention such as Fig. 3 and shown in Figure 5, and stream heat accumulating type lime rotary kiln comprises two rotary kilns 11, a thermophore 4, thermophore 4 is provided with dividing plate 13, and dividing plate is with thermophore 4 separated into two parts, and two-part structure is identical.One of two rotary kilns 11 is connected with water cooler 15 by kiln hood 12, and the other end is connected with thermophore 4.Miscellaneous equipment and connection state are identical with embodiment 1.Hocket smoke pre-heating Wingdale and emit the heat warm-up combustion-supporting air of being operating as of present embodiment, the both sides of thermophore 4, principle is identical with embodiment 1 with operational process.The advantage of present embodiment is the device compactness, saves to take up an area of the space.
Claims (5)
1. one kind and flow the heat accumulating type lime rotary kiln, comprise two rotary kilns (11), water cooler (15), one or two thermophore (4), feeding system (2), discharge system (16), gas blower (10), cooling blower (14) and exhaust emission system, described rotary kiln is provided with kiln hood (8), two rotary kilns are connected with water cooler by kiln hood (12), and water cooler is connected with discharge system; Described thermophore top material mouth is connected with feeding system by feed valve; Described thermophore (4) top gas port is connected with exhaust emission system with gas blower (10) respectively by T-valve (1), cooling blower is connected with water cooler, it is characterized in that: described thermophore is telescoping structure, comprise urceolus and inner core (17), be annular space (18) between urceolus and the inner core (17), the bottom of described annular space is connected with rotary kiln by kiln hood; Described thermophore is provided with 2～10 pushing devices, and described pushing device has pushing plate; Described limestone kiln is provided with 2～20 brunched burner nozzles, burner or pass the inner tube installation of thermophore at the connecting portion of thermophore and kiln hood, or be installed in kiln hood.
2. according to claim 1 and stream heat accumulating type lime rotary kiln, it is characterized in that: described inner core (17) top is pyramidal structure, and the intermediate cross-section is circular configuration.
3. according to claim 1 and stream heat accumulating type lime rotary kiln, it is characterized in that: described two rotary kilns (11) are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood (12).
4. according to claim 1 and stream heat accumulating type lime rotary kiln, it is characterized in that: described thermophore (4) is provided with dividing plate (13), and dividing plate is with the thermophore separated into two parts; One of described rotary kiln (11) is connected with water cooler (15) by kiln hood (12), and the other end is passed through kiln hood (8) and is connected with thermophore.
5. according to claim 1 and stream heat accumulating type lime rotary kiln, it is characterized in that: described exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310220537.4A CN103332873B (en) | 2013-06-05 | 2013-06-05 | Parallel-flow heat accumulating type lime rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310220537.4A CN103332873B (en) | 2013-06-05 | 2013-06-05 | Parallel-flow heat accumulating type lime rotary kiln |
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| CN103332873A true CN103332873A (en) | 2013-10-02 |
| CN103332873B CN103332873B (en) | 2015-06-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366964A (en) * | 2015-11-27 | 2016-03-02 | 石家庄新华能源环保科技股份有限公司 | Lime-coke-calcium carbide production joint apparatus |
| CN105731835A (en) * | 2016-01-28 | 2016-07-06 | 石家庄新华能源环保科技股份有限公司 | Multi-group heat accumulating type lime kiln 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515577A (en) * | 2011-12-03 | 2012-06-27 | 石家庄市新华工业炉有限公司 | Method and device for utilizing solar energy to calcine materials |
| 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 |
| CN203373275U (en) * | 2013-06-05 | 2014-01-01 | 石家庄新华能源环保科技股份有限公司 | Parallel flow heat accumulating type lime rotary kiln |
-
2013
- 2013-06-05 CN CN201310220537.4A patent/CN103332873B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515577A (en) * | 2011-12-03 | 2012-06-27 | 石家庄市新华工业炉有限公司 | Method and device for utilizing solar energy to calcine materials |
| 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 |
| CN203373275U (en) * | 2013-06-05 | 2014-01-01 | 石家庄新华能源环保科技股份有限公司 | Parallel flow heat accumulating type lime rotary kiln |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105366964A (en) * | 2015-11-27 | 2016-03-02 | 石家庄新华能源环保科技股份有限公司 | Lime-coke-calcium carbide production joint apparatus |
| CN105366964B (en) * | 2015-11-27 | 2018-09-28 | 石家庄新华能源环保科技股份有限公司 | Lime, coke and calcium carbide produce combined unit |
| CN105731835A (en) * | 2016-01-28 | 2016-07-06 | 石家庄新华能源环保科技股份有限公司 | Multi-group heat accumulating type lime kiln device |
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| CN103332873B (en) | 2015-06-10 |
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