CN103332873B - Parallel-flow heat accumulating type lime rotary kiln - Google Patents
Parallel-flow heat accumulating type lime rotary kiln Download PDFInfo
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- CN103332873B CN103332873B CN201310220537.4A CN201310220537A CN103332873B CN 103332873 B CN103332873 B CN 103332873B CN 201310220537 A CN201310220537 A CN 201310220537A CN 103332873 B CN103332873 B CN 103332873B
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- kiln
- thermophore
- rotary kiln
- rotary
- flow heat
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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 industrial furnace technical field, relate to a kind of rotary kiln, be specifically related to one and flow Heat storage type lime rotary kiln.
Background technology
Rotary kiln refers to rotary calcining kiln, and wherein lime rotary kiln uses the kiln calcining small particles material more widely, 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 the fine fraction raw material limestone of dinectly bruning 10-40mm or light dolomite, has the features 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 structure is simple, and air-flow is unobstructed, and sulfur-containing smoke gas can be discharged in time, and the sulfur in fuel not easily adheres to, and thus calcining finished product sulphur content is low, and purity is high, meets the specification of quality of finished product; Material both along the circumferential direction rolled simultaneously, and move vertically again, be heated evenly, combustion unit easy control of temperature, burning quality is good, Product Activity more than Du Keda 360mlL.
But because lime rotary kiln energy consumption is large, the popularization of serious restriction lime rotary kiln and development.Application number be 200920227150.0 Chinese utility model patent disclose one " calcination system of energy-saving rotary kiln ", in this patent, " calcined by rotary kiln system comprises rotary kiln, and fuel gas enters from rotary kiln low side, brings out from rotary kiln is high; Raw material from rotary kiln high-end enter, bring out from rotary kiln is low, it is characterized in that: rotary kiln is high-end to communicate with a heat recovery chamber, 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.Design like this, raw material is before entering rotary kiln, and drying heats up.”。But preheating tube is limited by preheating material recovered energy in this patent, save the energy and also have sufficient space, the rotary kiln of this patent is single rotary kiln in addition, is unfavorable for expanding production capacity.
Summary of the invention
The object of invention is to provide one and flows Heat storage type lime rotary kiln, utilizes two rotary kilns to combine with thermophore, makes full use of waste heat preheating material and the air of flue gas, thus reduces energy consumption, expands lime production ability.
The present invention also flows Heat storage 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 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 gas blower and exhaust emission system respectively by T-valve, and cooling blower is connected with water cooler.Thermophore is telescoping structure, comprises urceolus and inner core, and be annular space between urceolus cylindrical shell and inner core, the bottom of annular space is connected with rotary kiln by kiln hood.Thermophore is provided with 2 ~ 10 pushing devices, and pushing device is with pushing plate.Limestone kiln is provided with 2 ~ 20 brunched burner nozzles, burner or through the inner tube installation of thermophore at the connecting portion of thermophore and kiln hood, or be arranged on kiln hood.
Lime rotary kiln inner core top is pyramidal structure, and 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 thermophore is divided into two portions by dividing plate.One of rotary kiln is connected with water cooler by kiln hood, and other end is connected with thermophore by kiln hood, and two rotary kilns share a thermophore, and the side separated with thermophore dividing plate is respectively connected.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
The present invention also flows Heat storage type lime rotary kiln, by increasing thermophore, the flue gas utilizing calcination process to produce and material decompose the decomposition gas preheating material to be machined produced, material to be machined preheated air after recycling pre-heating temperature elevation, improve the temperature of combustion of fuel, thus take full advantage of waste heat, reduce 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.Combined with thermophore by kiln hood two rotary kilns, realize preheating by calcining raw materials and combustion air, be conducive to the stability of lime production, expand production capacity.Burner is arranged on the connecting portion of thermophore and kiln hood or is arranged on kiln hood, adds the selectivity of production operation.
Accompanying drawing explanation
Fig. 1 is the present invention and flows the structural representation of Heat storage 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 in 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
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment 1
The present invention also flows Heat storage 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 top material mouth is connected with feeding system 2 by feed valve 3.Two thermophore 4 are telescoping structure, and as shown in Figure 4, comprise urceolus and inner core 17, inner core 17 top is pyramidal structure, and intermediate cross-section is circular configuration.Be annular space 18 between urceolus and 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 port is connected with gas blower 10 and exhaust emission system respectively by T-valve 1, and thermophore 4 is provided with 6 pushing devices 5, and pushing device is with pushing plate 6, and pushing plate 6 is evenly distributed on thermophore bottom.Limestone kiln is provided with 6 brunched burner nozzles 7, and burner is arranged on the connecting portion of thermophore 4 and kiln hood 8 through the inner core 17 of thermophore 4, 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 the operational process flowing Heat storage type lime rotary kiln is that raw limestone enters thermophore 4 through left side feeding system 2, is evenly distributed on annular space 18 by the cone on inner core 17 top.The flue gas of being come by left side rotary kiln 11 enters the annular space of thermophore 4 through kiln hood 8, carries out preheating to the raw material in thermophore.Raw limestone after preheating pushes kiln hood 8 by pushing device 5, enters left side rotary kiln 11 calcine through kiln hood 8.Lime after calcining is through kiln hood 12 to water cooler 15, and the cooling air sent by cooling blower 14 cools the high-temperature lime in water cooler 15, and cooled lime goes out device through discharge port and discharge system 16.Gas operation scheme be the air that bloats of right-hand drum blower fan 10 through T-valve 1 to right side thermophore 4, in thermophore air be preheated after raw material liberated heat warm-up combustion-supporting air.Fuel gas enters burner 7 through right side valve 9, at burner outlet ejection fuel, with the air mixed after thermophore preheating, enter right side rotary kiln 11 through kiln hood 8 to burn, limestone material in the rotary kiln of right side is calcined, the flue gas that burning produces and decomposition gas are together through the gas and vapor permeation of kiln hood 12 with water cooler 15 cool lime, preheating lime stone material is continued to left side rotary kiln 11, then mixed gas is through kiln hood 8 and left side thermophore 4 preheating lime stone material and accumulation of heat, release the flue gas after heat through T-valve 1 to exhaust emission system discharge, the temperature of fume emission is lower than 150 DEG C.According to both sides fume emission design temperature, both sides rotary kiln 11 hockets and calcines and preheating, both sides thermophore 4 hockets accumulation of heat and release heat preheated air, and realize alternate run by the action of T-valve 1, valve 9 and feed valve 3, the design temperature of fume emission is 150 DEG C.
Embodiment 2
As shown in Figure 2, burner 7 is arranged on kiln hood 8 to another embodiment of the present invention, and the entrance of burner 7 is connected with fuel conduit by valve 9, and the outlet of burner is positioned at kiln hood.Air in thermophore 4 after preheating to mix with fuel gas at kiln hood 8 and burns.Miscellaneous equipment and operation identical with embodiment 1.
Embodiment 3
An embodiment more of the present invention as shown in Figure 3 and Figure 5, and flows Heat storage type lime rotary kiln and comprises two rotary kilns, 11, thermophore 4, and thermophore 4 is provided with dividing plate 13, and thermophore 4 is divided into two portions by dividing plate, and two-part structure is identical.One of two rotary kilns 11 is connected with water cooler 15 by kiln hood 12, and other end is connected with thermophore 4.Miscellaneous equipment and connection state identical with embodiment 1.Being operating as of the present embodiment, hocket smoke pre-heating Wingdale and release heat warm-up combustion-supporting air for the both sides of thermophore 4, and principle is identical with embodiment 1 with operational process.The advantage of the present embodiment is that device is compact, saves and takes up an area space.
Claims (5)
1. one kind and flow Heat storage 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 systems, 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 gas blower (10) and exhaust emission system 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 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 is with pushing plate, and pushing plate is evenly distributed on thermophore bottom; Described lime rotary kiln is provided with 2 ~ 20 brunched burner nozzles, burner or through the inner tube installation of thermophore at the connecting portion of thermophore and kiln hood, or be arranged on kiln hood.
2. according to claim 1 and flow Heat storage type lime rotary kiln, it is characterized in that: described inner core (17) top is pyramidal structure, intermediate cross-section is circular configuration.
3. according to claim 1 and flow Heat storage 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 flow Heat storage type lime rotary kiln, it is characterized in that: described thermophore (4) is provided with dividing plate (13), and thermophore is divided into two portions by dividing plate; One of described rotary kiln (11) is connected with water cooler (15) by kiln hood (12), and other end is connected with thermophore by kiln hood (8).
5. according to claim 1 and flow Heat storage type lime rotary kiln, it is characterized in that: described exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
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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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| 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 CN103332873A (en) | 2013-10-02 |
| CN103332873B true CN103332873B (en) | 2015-06-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104803615A (en) * | 2015-03-24 | 2015-07-29 | 石家庄新华能源环保科技股份有限公司 | Heat accumulating type lime rotary kiln |
| 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 |
| CN105731835B (en) * | 2016-01-28 | 2019-03-29 | 石家庄新华能源环保科技股份有限公司 | A kind of multiple groups heat accumulating type lime kiln device |
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 |
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- 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 |
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