CN204388572U - The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat - Google Patents
The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat Download PDFInfo
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- CN204388572U CN204388572U CN201420805215.6U CN201420805215U CN204388572U CN 204388572 U CN204388572 U CN 204388572U CN 201420805215 U CN201420805215 U CN 201420805215U CN 204388572 U CN204388572 U CN 204388572U
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- flue
- shaft furnace
- heat
- calcining furnace
- formula calcining
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Abstract
The utility model discloses 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 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.Flue gas heat obtains multistage and makes full use of, and improves utilization efficiency of heat energy, reduces fuel consumption; The reduction of smog discharge temperature, improves the service life of equipment, reduces dust removal process air quantity, saves dedusting operation energy consumption and investment; Two complete equipments are used alternatingly, the production cycle of shortening, the speed of production of quickening.
Description
Technical field
The utility model belongs to lump material calcining furnace field, particularly relates 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.
Utility model content
For overcoming the deficiencies in the prior art, the purpose of this utility model 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 utility model is realized by following technical scheme.
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 utility model 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 utility model has the advantage of:
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 utility model;
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 utility model 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 utility model and existing equipment contrast, and obtain the data of following table:
| Project | The utility model | 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 utility model is illustrated according to above-described embodiment, should be appreciated that above-described embodiment does not limit the utility model in any form, and all employings are equal to replacement or the technical scheme that obtains of equivalent transformation mode, all drop within protection domain of the present utility model.
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 |
|---|---|---|---|
| CN201420805215.6U CN204388572U (en) | 2014-12-18 | 2014-12-18 | The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420805215.6U CN204388572U (en) | 2014-12-18 | 2014-12-18 | The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat |
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| Publication Number | Publication Date |
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| CN204388572U true CN204388572U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420805215.6U Active CN204388572U (en) | 2014-12-18 | 2014-12-18 | The two shaft furnace formula calcining furnace of a kind of multistage accumulation of heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501578A (en) * | 2014-12-18 | 2015-04-08 | 南京净环热冶金工程有限公司 | Multistage heat-storage double shaft kiln type calcinator |
-
2014
- 2014-12-18 CN CN201420805215.6U patent/CN204388572U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501578A (en) * | 2014-12-18 | 2015-04-08 | 南京净环热冶金工程有限公司 | Multistage heat-storage double shaft kiln type calcinator |
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| GR01 | Patent grant |