CN104501578A - Multistage heat-storage double shaft kiln type calcinator - Google Patents
Multistage heat-storage double shaft kiln type calcinator Download PDFInfo
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- CN104501578A CN104501578A CN201410790788.0A CN201410790788A CN104501578A CN 104501578 A CN104501578 A CN 104501578A CN 201410790788 A CN201410790788 A CN 201410790788A CN 104501578 A CN104501578 A CN 104501578A
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- heat
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Abstract
The invention discloses a multistage heat-storage double shaft kiln type calcinator. The multistage heat-storage double shaft kiln type calcinatory comprises an air pipeline and two shaft kiln type calcinator bodies, and smoke pipelines are mounted at the tops of the shaft kiln type calcinator bodies and provided with reversing valves. Each smoke pipeline is connected with the air pipeline through the corresponding reversing valve. A fuel spraying pipe is arranged in each shaft kiln type calcinator body, a channel communicating the two calcinator bodies is arranged at the bottom of each shaft kiln type calcinator body, all smoke pipelines are combined into a main smoke duct after passing the reversing valves corresponding to the smoke pipelines, and a smoke discharge pipeline heat exchanger is mounted on the main smoke duct. Smoke heat is sufficiently utilized in multiple stages, utilization efficiency of heat is improved, and fuel consumption is reduced. Smoke discharge temperature is lowered, service life of equipment is prolonged, dust treatment air amount is reduced, and dust removal operation energy consumption and investment are saved; two shaft kilns are alternatively used, production period is shortened and production speed is accelerated.
Description
Technical field
The invention belongs to lump material calcining furnace field, particularly relate to the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat.
Background technology
The general conventional calcination facility of lump material calcining is shaft (tower) furnace, as calcined ore, mineral pelletizing, lime stone, dolomite, metal charge etc., the single shaft furnace structure of the many employings of existing calcining furnace, namely from shaft furnace top-feed, the lump material calcined is discharged from bottom, and fuel and combustion air enter burning bottom shaft furnace, waste gas is discharged from shaft furnace top.The subject matter of prior art is that heat energy from waste gas can not effectively utilize, and calcining hear rate is high, and the equipment of the waste gas simultaneously more than 200 DEG C to furnace roof causes adverse effect.
Summary of the invention
For overcoming the deficiencies in the prior art, the object of the present invention is to provide a kind of by lump material and heat storage, flue gas is carried out to two shaft furnace formula calcining furnaces of multistage accumulation of heat, reach and preheating is carried out to combustion air, fuel and material, realize the two shaft furnace formula calcining furnace of multistage accumulation of heat of low energy consumption, equipment optimum of operation.
For achieving the above object, the present invention is achieved by the following technical solutions.
The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat, comprises air duct, two shaft furnace formula calcining furnace bodies, is all provided with flue, flue is provided with reversal valve at the top of each described shaft furnace formula calcining furnace body; Described in every root, flue is connected with air duct respectively by the reversal valve of its correspondence; Fuel nozzle is provided with in each described shaft furnace formula calcining furnace body; The passage of connection two bodies of heater is provided with in the bottom of each described shaft furnace formula calcining furnace body; All flues, merging into a total gas flue after the reversal valve corresponding with this flue, total flue are provided with smoke discharging pipe heat exchanger.
Operation principle of the present invention is: block stock enters from two body of heater tops, after the combustion heating of fuel and air, moves downward and discharges body of heater and complete calcining.During work, the first body of heater fuel nozzle passes into fuel, combustion air is entered by the flue of reversal valve from the first body of heater top simultaneously, in the middle part of body of heater after the burning of combustion zone, flue gas enters the second body of heater by the passage of bottom of furnace body, preheating is carried out to the raw material in the second body of heater, flue gas rises through the flue on the second body of heater, after the raw material preheating in the second body of heater to predetermined temperature, and discharge after final temperature reduces.Switch after first body of heater calcining terminates, second body of heater burning, combustion air is entered by the flue of reversal valve from the second body of heater top, in the middle part of the second body of heater after the burning of combustion zone, flue gas enters the first body of heater by the passage of furnace bottom, preheating is carried out to the raw material in the first body of heater, two body of heater body alternately calcinings.
Described flue installs heat storage between body of heater and reversal valve, and described heat storage is the honeycomb coaly cylinder that metal or refractory material are made, size and flue suitable.Introducing flue gas at two body of heater top combustion airs enters in pipeline, arranges the heat storage of metal or refractory material composition, and when discharging flue gas and passing through, heat storage absorbs flue gas heat and stores; When introducing combustion air and passing through, store heat is passed to combustion air by heat storage, improves heating efficiency.
Described fuel nozzle is by gaseous state, powder state, liquid state or mixed state fuel.Can select the fuel of different calorific value according to the difference of calcining materials, as natural gas, coal gas, coal dust, fuel wet goods, coal dust brings stove combustion into by natural gas, coal gas or compressed air.
Described fuel nozzle first enters shaft furnace formula calcining furnace again after the heat exchange of smoke discharging pipe heat exchanger.Fuel, by heat exchanger, absorbs the heat in flue gas, improves fuel temperature, and then improves heating efficiency.
Beneficial effect: compared with prior art, the invention has the advantages that:
1) flue gas heat obtains multistage and makes full use of, and improves utilization efficiency of heat energy, reduces fuel consumption;
2) reduction of smog discharge temperature, improves the service life of equipment, reduces dust removal process air quantity, saves dedusting operation energy consumption and investment;
3) two complete equipments are used alternatingly, the production cycle of shortening, the speed of production of quickening.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention;
1. the first body of heater; 2. interface channel; 3. the first fuel nozzle; 4. the first flue;
5. the first heat storage; 6. the first reversal valve; 7. smoke discharging pipe heat exchanger; 8. the second body of heater;
9. the second fuel nozzle; 10. the second flue; 11. second heat storages;
12. second reversal valves; 13. air ducts.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, a kind of application example of the two shaft furnace formula calcining furnace of described multistage accumulation of heat, calcining raw materials is dolomite clinker, enters stove granularity 30-80mm, and the fuel of use is coal gas and coal dust.
The two shaft furnace formula calcining furnace of the multistage accumulation of heat adopted comprises the first body of heater 1 and the second body of heater 8, two bottom of furnace body are connected by interface channel 2, dolomite is full of body of heater, first coal gas as fuel pass through smoke discharging pipe heat exchanger 7, after absorbing the heat in flue gas, and entering part first fuel nozzle 3, spray into left body of heater 1, also have coal dust as part of fuel, enter other fuel nozzle 3 of the first stove by compressed air delivery, spray into the first body of heater 1, combustion air is by air duct 13, the first body of heater 1 is imported by the first reversal valve 6, and by the first heat storage 5 before entering body of heater, absorb the flue gas heat intensification that metal heat storage stores, body of heater is entered afterwards by the first flue 4, combustion air and fuel mix are burnt, the high-temperature flue gas produced after burning flows downward, the second body of heater 8 is entered by interface channel 2, now the second fuel nozzle 9 does not spray into fuel, after flue gas transfers heat to white clouds building stones through white clouds building stones, when entering the second heat storage 11 by the second flue 10, partial heat is transmitted again and is stored in the second heat storage 11, then the second reversal valve 12 is passed through discharged to dust removal installation, before entering dust removal installation, flue gas is by smoke discharging pipe heat exchanger 7, can again partial heat be passed to simultaneously by the coal gas of smoke discharging pipe heat exchanger 7.
Above calcination process continues for some time, treat that the first stove calcining terminates, switched by the first reversal valve 6, second reversal valve 12, after first, second stove carries out reinforced and discharging action simultaneously, first, second stove function is exchanged, coal gas as fuel passes through smoke discharging pipe heat exchanger 7, after absorbing the heat in flue gas, entering part second fuel nozzle 9, spray into the second body of heater 8, also have part as the coal dust of fuel, enter other fuel nozzle 9 of the second stove by compressed air delivery, spray into the second body of heater 8, combustion air is by air duct 13, the second body of heater 8 is imported by the second reversal valve 12, and by the second heat storage 11 before entering body of heater, absorb the flue gas heat intensification that metal heat storage stores, body of heater is entered afterwards by the second flue 10, combustion air and fuel mix are burnt, the high-temperature flue gas produced after burning flows downward, the first body of heater 1 is entered by interface channel 2, now the first fuel nozzle 3 does not spray into fuel, after flue gas transfers heat to white clouds building stones through white clouds building stones, when entering the first heat storage 5 by the first flue 4, partial heat is transmitted again and is stored in the first heat storage 5, then the first reversal valve 6 is passed through discharged to dust removal installation, before entering dust removal installation, flue gas is by smoke discharging pipe heat exchanger 7, can again partial heat be passed to simultaneously by the coal gas of smoke discharging pipe heat exchanger 7.
First body of heater, the second body of heater are according to above-mentioned operating principle cycle alternation, flue gas is all the time through raw limestone accumulation of heat, the accumulation of heat of pipeline heat storage, the heat exchange of smoke discharging pipe heat exchanger, heat is passed to raw material, combustion air, fuel respectively, realize making full use of of heat, and then reduce fuel consumption, reduce exhaust gas temperature.
Heat storage adopts similar honeycomb coal texture, and available metal or other refractory materials are made, and appearance and size coordinates with flue.Described reversal valve is high temperature resistant three valve.Described smoke discharging pipe heat exchanger is tubular heat exchanger.
The present invention and existing equipment contrast, and obtain the data of following table:
| Project | The present invention | Existing equipment |
| Heat utilization rate | ＞80％ | ＜70％ |
| Fuel Consumption | ＜800kcal/kg | ＞1000kcal/kg |
| Service life | > 6 years | < 4 years |
| The energy saved | 40kg marks coal/t | 0 |
| Production cycle | Unchanged |
The present invention is illustrated according to above-described embodiment, should be appreciated that above-described embodiment does not limit the present invention in any form, and all employings are equal to replacement or the technical scheme that obtains of equivalent transformation mode, all drop within protection scope of the present invention.
Claims (7)
1. the two shaft furnace formula calcining furnace of multistage accumulation of heat, is characterized in that, comprise air duct, two shaft furnace formula calcining furnace bodies, be all provided with flue, flue is provided with reversal valve at the top of each described shaft furnace formula calcining furnace body; Described in every root, flue is connected with air duct respectively by the reversal valve of its correspondence; Fuel nozzle is provided with in each described shaft furnace formula calcining furnace body; The passage of connection two bodies of heater is provided with in the bottom of each described shaft furnace formula calcining furnace body; All flues, merging into a total gas flue after the reversal valve corresponding with this flue, total flue are provided with smoke discharging pipe heat exchanger.
2. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, it is characterized in that, described fuel nozzle is arranged on the middle and upper part of shaft furnace formula calcining furnace body.
3. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, is characterized in that, described flue also installs heat storage between body of heater and reversal valve.
4. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, it is characterized in that, described heat storage is the honeycomb coaly cylinder that metal or refractory material are made, size and flue suitable.
5. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, it is characterized in that, described total flue exit is provided with dust arrester.
6. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, it is characterized in that, described smoke discharging pipe heat exchanger is tubular heat exchanger.
7. the two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat according to claim 1, it is characterized in that, described reversal valve is high temperature resistant three valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790788.0A CN104501578A (en) | 2014-12-18 | 2014-12-18 | Multistage heat-storage double shaft kiln type calcinator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410790788.0A CN104501578A (en) | 2014-12-18 | 2014-12-18 | Multistage heat-storage double shaft kiln type calcinator |
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| CN104501578A true CN104501578A (en) | 2015-04-08 |
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| CN201410790788.0A Pending CN104501578A (en) | 2014-12-18 | 2014-12-18 | Multistage heat-storage double shaft kiln type calcinator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766865A (en) * | 2017-01-21 | 2017-05-31 | 江苏中圣园科技股份有限公司 | Flash calcination system |
| CN106989590A (en) * | 2017-04-20 | 2017-07-28 | 中钢集团鞍山热能研究院有限公司 | A kind of bicyclic room alternately heating filters the intelligent calciner plant of dirt and method for calcinating certainly |
| CN109425232A (en) * | 2017-08-28 | 2019-03-05 | 上饶市融源再生资源有限公司 | Tower calcining furnace with binary |
| CN114322546A (en) * | 2020-09-30 | 2022-04-12 | 宝山钢铁股份有限公司 | Discharging method and device for rotary hearth furnace |
| CN114608331A (en) * | 2022-01-27 | 2022-06-10 | 大冶有色金属有限责任公司 | Heat preservation and furnace drying device and heat preservation and furnace drying method |
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| CA1124513A (en) * | 1978-09-15 | 1982-06-01 | Erwin Fussl | Process for calcining mineral raw materials in a uniflow regenerative shaft furnace |
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| CN102557492A (en) * | 2012-01-06 | 2012-07-11 | 石家庄市新华工业炉有限公司 | Heat accumulating type double-hearth lime kiln |
| CN203561187U (en) * | 2013-09-26 | 2014-04-23 | 山东耀通节能投资有限公司 | Energy-saving thermal storage calcining kiln |
| CN204388572U (en) * | 2014-12-18 | 2015-06-10 | 南京净环热冶金工程有限公司 | The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat |
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| CA1124513A (en) * | 1978-09-15 | 1982-06-01 | Erwin Fussl | Process for calcining mineral raw materials in a uniflow regenerative shaft furnace |
| CN1076270A (en) * | 1992-03-07 | 1993-09-15 | 梅尔兹-奥芬布股份公司 | The shaft furnace that is used for sintering mineral stock |
| CN1798948A (en) * | 2003-06-03 | 2006-07-05 | 梅尔兹-奥芬布股份公司 | Process for burning lumps of material with lean gas |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766865A (en) * | 2017-01-21 | 2017-05-31 | 江苏中圣园科技股份有限公司 | Flash calcination system |
| CN106989590A (en) * | 2017-04-20 | 2017-07-28 | 中钢集团鞍山热能研究院有限公司 | A kind of bicyclic room alternately heating filters the intelligent calciner plant of dirt and method for calcinating certainly |
| CN106989590B (en) * | 2017-04-20 | 2022-12-02 | 中钢集团鞍山热能研究院有限公司 | Double-ring-chamber alternate heat supply self-dust-filtering intelligent calcining device and calcining method |
| CN109425232A (en) * | 2017-08-28 | 2019-03-05 | 上饶市融源再生资源有限公司 | Tower calcining furnace with binary |
| CN114322546A (en) * | 2020-09-30 | 2022-04-12 | 宝山钢铁股份有限公司 | Discharging method and device for rotary hearth furnace |
| CN114322546B (en) * | 2020-09-30 | 2024-04-05 | 宝山钢铁股份有限公司 | Discharging method and device for rotary hearth furnace |
| CN114608331A (en) * | 2022-01-27 | 2022-06-10 | 大冶有色金属有限责任公司 | Heat preservation and furnace drying device and heat preservation and furnace drying method |
| CN114608331B (en) * | 2022-01-27 | 2024-02-23 | 大冶有色金属有限责任公司 | Heat preservation and baking device and heat preservation and baking method |
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Address after: The peak area of Jiangning District of Nanjing city industrial area of Tangshan, Jiangsu province 211134 Applicant after: NANJING JINGHUANRE METALLURGY ENGINEERING CO., LTD. Address before: 210016, room 616, building B, building 319, Zhongshan East Road, Nanjing, Jiangsu Applicant before: NANJING JINGHUANRE METALLURGY ENGINEERING CO., LTD. |
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Free format text: CORRECT: ADDRESS; FROM: 210016 NANJING, JIANGSU PROVINCE TO: 211134 NANJING, JIANGSU PROVINCE |
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