CN104803615A - Heat accumulating type lime rotary kiln - Google Patents
Heat accumulating type lime rotary kiln Download PDFInfo
- Publication number
- CN104803615A CN104803615A CN201510129141.8A CN201510129141A CN104803615A CN 104803615 A CN104803615 A CN 104803615A CN 201510129141 A CN201510129141 A CN 201510129141A CN 104803615 A CN104803615 A CN 104803615A
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- CN
- China
- Prior art keywords
- rotary kiln
- kiln
- thermophore
- storage type
- heat storage
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to a heat accumulating type lime rotary kiln which comprises two rotary kiln bodies, a cooler, one or two heat accumulators, one or two blowers, a cooling fan and a flue gas exhaust system, wherein the two rotary kiln bodies are connected with the cooler through a kiln tail hood, and an air port in the upper part of each heat accumulator is connected with the corresponding blower and the flue gas exhaust system respectively through a three-way valve; each heat accumulator adopts a telescoping structure, an inner barrel and an outer barrel are concentrically arranged, annular space is formed between the inner barrel and the outer barrel, and the lower part of the annular space is connected with the corresponding rotary kiln body through corresponding kiln head; the lime rotary kiln further comprises burners and an auxiliary burner, the burners are mounted on the kiln heads, and the auxiliary burner is mounted on the kiln tail hood. The heat accumulators of the heat accumulating type lime rotary kiln adopt the telescoping parallel flow structure, the heat transfer effect is good, and processed materials can be pre-heated uniformly; the two rotary kiln bodies are connected with the heat accumulators through the kiln tail hood to realize preheating of calcined raw materials and combustion air, continuity and stability of lime production are facilitated, and the production capacity is improved.
Description
Technical field
The invention belongs to industrial furnace technical field, relate to a kind of rotary kiln, be specifically related to a kind of 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 a kind of 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.
Technical scheme of the present invention is 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.Thermophore top gas port is connected with gas blower and exhaust emission system 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 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 burner and auxiliary burning nozzle, and burner is arranged on kiln hood, and auxiliary burning nozzle is arranged on kiln hood.
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 two rotary kilns is connected with water cooler by kiln hood, and other end is connected with thermophore by kiln hood.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.T-valve is connected with exhaust emission system by waste heat power generation equipment.Waste heat power generation equipment comprises waste heat boiler, steam turbine and generator.Steam coils established by waste heat boiler, and steam coils is connected with steam turbine, and steam turbine is coaxially connected with generating set.Burner and auxiliary burning nozzle are geseous fuel burner, liquid fuel burner or solid fuel burner.Feeding system comprises feeder, feeding cart and hopper.Rotary kiln is provided with temperature measuring equipment, and temperature measuring equipment is wireless signal temperature measuring equipment.
Heat storage type lime rotary kiln of the present invention, 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 structural representation of Heat storage type lime rotary kiln of the present invention;
Fig. 2 is the structural representation of another embodiment of the present invention;
Fig. 3 is thermophore sectional view;
Fig. 4 is the sectional view of another embodiment thermophore;
Wherein:
1-T-valve, 2-feed valve, 3-feeding system, 4-thermophore, 5-pushing device, 6-pushing plate, 7-burner, 8-flue gas pipeline, 9-valve, 10-waste heat power generation equipment, 11-gas blower, 12-temperature measuring equipment, 13-rotary kiln, 14-kiln hood, 15-auxiliary burning nozzle, 16-water cooler, 17-cooling blower, 18-discharge system, 19-dividing plate, 20-inner core, 21-annular space, 22-kiln hood.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.Scope is not limited to embodiment, and those skilled in the art make any change and also belong to the scope of protection of the invention in the scope that claim limits.
Embodiment 1
Heat storage type lime rotary kiln of the present invention, as shown in Figure 1, comprises two rotary kilns 13, water cooler 16, two thermophore 4, feeding system 3, discharge system 18, gas blower 11, cooling blower 17, waste heat power generation equipment 10 and exhaust emission systems.Two rotary kilns are symmetrically arranged, and lay respectively at the both sides of kiln hood.Rotary kiln is provided with kiln hood 22, and two rotary kilns are connected with water cooler by kiln hood 14, and water cooler 16 is connected with discharge system, and cooling blower is connected with water cooler.Thermophore 4 top material mouth is connected with feeding system 3 by feed valve 2.Two thermophore 4 are telescoping structure, and as shown in Figure 3, thermophore 4 comprises urceolus and inner core 20, and inner core top is pyramidal structure, and intermediate cross-section is circular configuration.Be annular space 21 between urceolus and inner core, annular space is the space that raw material passes through, and flue gas or air carry out heat exchange at annular space and raw material, and the bottom of annular space is connected with rotary kiln 13 by kiln hood 22.The top gas port of thermophore 4 is connected with gas blower 11 by T-valve 1 one tunnel, and pipeline flue gas pipeline 8 of separately leading up to is connected with waste heat power generation equipment 10, and the outlet of waste heat power generation equipment is connected with exhaust emission system.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.Waste heat power generation equipment 10 comprises waste heat boiler, steam turbine and generator.Steam coils established by waste heat boiler, and steam coils is connected with steam turbine, and steam turbine is coaxially connected with generating set.Limestone kiln is provided with burner 7 and auxiliary burning nozzle 15, and burner and auxiliary burning nozzle are geseous fuel burner, and burner is arranged on kiln hood 22, and auxiliary burning nozzle is arranged on kiln hood 14.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.Rotary kiln is provided with temperature measuring equipment 12, and temperature measuring equipment is infrared radio signal temperature measuring equipment, is arranged on the kiln body of both sides rotary kiln, rotates thermometric, be wirelessly transmitted to watch-keeping cubicle with kiln body.
The operational process of Heat storage type lime rotary kiln of the present invention is that raw limestone enters thermophore 4 through left side feeding system 3, is evenly distributed on annular space 21 by the cone on inner core 20 top.The flue gas of being come by left side rotary kiln 13 enters the annular space of thermophore 4 through kiln hood 22, carries out preheating to the raw material in thermophore.Raw limestone after preheating pushes kiln hood 22 by pushing device 5, enters left side rotary kiln 13 calcine through kiln hood.Lime after calcining is through kiln hood 14 to water cooler 16, and the cooling air sent by cooling blower 17 cools the high-temperature lime in water cooler 16, and cooled lime goes out device through discharge port and discharge system 18.Gas operation scheme be the air that bloats of right-hand drum blower fan 11 through T-valve 1 to right side thermophore 4, the raw material liberated heat warm-up combustion-supporting air in thermophore after preheating.Fuel gas enters right side burner 7 and sprays fuel, with the air mixed after thermophore preheating, enters right side rotary kiln 13 and burns, calcine limestone material in the rotary kiln of right side through kiln hood 22.The flue gas that burning produces and decomposition gas through the gas and vapor permeation of kiln hood 14 with water cooler 16 cool lime, continue heating lime stone material to left side rotary kiln 13 together.Then mixed gas is through kiln hood and left side thermophore 4 preheating lime stone material and accumulation of heat, the flue gas of releasing after heat generates electricity to waste heat power generation equipment 10 through T-valve 1 and flue gas pipeline 8, useless flue gas after generating is to exhaust emission system discharge, and the temperature of fume emission is lower than 150 DEG C.According to the design temperature of fume emission, both sides rotary kiln 13 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 2, the design temperature of fume emission is 150 DEG C.The choice for use auxiliary burning nozzle 15 when preheating temperature deficiency, ejection fuel combustion additional heat.
Embodiment 2
As shown in Figure 2 and Figure 4, Heat storage type lime rotary kiln comprises two rotary kilns, 13, thermophore 4 to another embodiment of the present invention, and thermophore 4 is provided with dividing plate 19, and thermophore 4 is divided into two portions by dividing plate, and two-part structure is identical.One of two rotary kilns 13 is connected with water cooler 16 by kiln hood 14, and other end is connected with thermophore 4.Two rotary kilns 13 hocket and calcine and preheating, the material space-alternating of thermophore dividing plate 19 both sides carries out accumulation of heat and releases heat preheated air, realize alternate run by the action of T-valve 1, valve 9 and feed valve 3, the design temperature of fume emission is 160 DEG C.Miscellaneous equipment and connection state identical with embodiment 1.The advantage of the present embodiment is that device is compact, saves and takes up an area space.
Claims (9)
1. a Heat storage type lime rotary kiln, comprise two rotary kilns (13), water cooler (16), one or two thermophore (4), feeding system (3), discharge system (18), gas blower (11), cooling blower (17) and exhaust emission systems, described rotary kiln is provided with kiln hood (22), two rotary kilns are connected with water cooler by kiln hood (14), and water cooler is connected with discharge system; Described thermophore top material mouth is connected with feeding system by feed valve; It is characterized in that: described thermophore (4) top gas port is connected with gas blower and exhaust emission system by T-valve (1), and cooling blower is connected with water cooler; Described thermophore is telescoping structure, and comprise urceolus and inner core (20), be annular space (21) between urceolus and inner core, 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; Described limestone kiln is provided with burner (7) and auxiliary burning nozzle (15), and burner is arranged on kiln hood, and auxiliary burning nozzle is arranged on kiln hood.
2. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described inner core (20) top is pyramidal structure, and intermediate cross-section is circular configuration.
3. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described two rotary kilns (13) are symmetrically arranged or asymmetric arrangement, lay respectively at the both sides of kiln hood (14).
4. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described thermophore (4) is provided with dividing plate (19), and thermophore is divided into two portions by dividing plate; One of two rotary kilns (13) is connected with water cooler (16) by kiln hood (14), and other end is connected with thermophore by kiln hood (22).
5. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
6. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described T-valve (1) is connected with exhaust emission system by waste heat power generation equipment (10).
7. Heat storage type lime rotary kiln according to claim 6, is characterized in that: described waste heat power generation equipment (10) comprises waste heat boiler, steam turbine and generator; Steam coils established by waste heat boiler, and steam coils is connected with steam turbine, and steam turbine is coaxially connected with generating set.
8. Heat storage type lime rotary kiln according to claim 1, is characterized in that: described burner (7) and auxiliary burning nozzle (15) are geseous fuel burner, liquid fuel burner or solid fuel burner.
9. Heat storage type lime rotary kiln according to claim 1, is characterized in that: rotary kiln is provided with temperature measuring equipment (12), and temperature measuring equipment is wireless signal temperature measuring equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510129141.8A CN104803615A (en) | 2015-03-24 | 2015-03-24 | Heat accumulating type lime rotary kiln |
| PCT/CN2015/088329 WO2016150100A1 (en) | 2015-03-24 | 2015-08-28 | Heat-accumulating lime rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510129141.8A CN104803615A (en) | 2015-03-24 | 2015-03-24 | Heat accumulating type lime rotary kiln |
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| Publication Number | Publication Date |
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| CN104803615A true CN104803615A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510129141.8A Pending CN104803615A (en) | 2015-03-24 | 2015-03-24 | Heat accumulating type lime rotary kiln |
Country Status (2)
| Country | Link |
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| CN (1) | CN104803615A (en) |
| WO (1) | WO2016150100A1 (en) |
Cited By (3)
| 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 |
| CN110749189A (en) * | 2018-07-24 | 2020-02-04 | 唐山市丰南区奉岗灰业有限公司 | Novel white lime cellar with waste heat utilization function |
| CN113137857A (en) * | 2021-04-15 | 2021-07-20 | 镇江新宇固体废物处置有限公司 | Novel rotary kiln using waste heat circulation to support combustion |
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| CN109574523B (en) * | 2018-12-25 | 2024-04-16 | 石家庄新华能源环保科技股份有限公司 | Lime kiln for directly burning high-temperature coal gas of gasification furnace in hot feeding manner |
| CN109708464B (en) * | 2019-01-02 | 2024-01-02 | 宁波大学 | Double-cylinder rotary kiln for smoke-gas split-flow purification |
| CN111217542B (en) * | 2020-03-23 | 2024-02-06 | 南京威普粉体工程有限公司 | Sleeve shaft kiln for calcining lime in advection manner |
| CN112944927B (en) * | 2021-03-12 | 2022-12-06 | 华北水利水电大学 | Multi-point flue gas collecting and heat-extracting system for lime kiln production |
| CN113372024B (en) * | 2021-07-03 | 2023-03-24 | 石家庄新华能源环保科技股份有限公司 | Double-hearth kiln for calcining lime by using low-calorific-value fuel and calcining method |
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| CN113137857A (en) * | 2021-04-15 | 2021-07-20 | 镇江新宇固体废物处置有限公司 | Novel rotary kiln using waste heat circulation to support combustion |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016150100A1 (en) | 2016-09-29 |
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Application publication date: 20150729 |