CN204787783U - Tunnel cave kiln tail refrigeration cycle device - Google Patents
Tunnel cave kiln tail refrigeration cycle device Download PDFInfo
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- CN204787783U CN204787783U CN201520439875.1U CN201520439875U CN204787783U CN 204787783 U CN204787783 U CN 204787783U CN 201520439875 U CN201520439875 U CN 201520439875U CN 204787783 U CN204787783 U CN 204787783U
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- kiln tail
- heat exchanger
- air
- heater
- cooling
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a tunnel cave kiln tail refrigeration cycle device, including cooling body, waste heat retrieval and utilization mechanism, the cooling body sets up along kiln tail fore -and -aft direction, the cooling body includes firstly, two at least heat exchangers of second, two heat exchangers concatenate, gas vent intercommunication on first heat exchanger and the kiln tail lateral wall, be equipped with first air heater behind the second heat exchanger, be equipped with the heating pipe tee bend behind the first air heater, export of heating pipe tee bend is equipped with first spraying cooling device, another export is equipped with the third heat exchanger, be equipped with the second air heater behind the third heat exchanger, be equipped with second spraying cooling device behind the second air heater, two spraying cooling device locate kiln tail top, waste heat retrieval and utilization mechanism includes third air heater, burner blower, the third air heater communicates with the induction port that kiln tail top was equipped with, and third air heater air outlet extends to reduction nozzle department with the second heat exchanger stretch into the kiln tail through the pipeline inside after the burner blower air outlet communicates. The the device energy consumption is low, and with low costs, the cooling effect is good.
Description
Technical field
The utility model relates to field of metallurgical equipment, particularly relates to a kind of tunnel kiln tail cooling-cycle device for DRI.
Background technology
In China, coal-based tunnel cave pot type method is produced reduced iron and has been developed for many years, and its comparison of technology is stable, ripe, project distribution is relatively general; Meanwhile, its production capacity is corresponding to be improved, and at present, the ability of tunnel kiln reduction kiln year reduction raw ore is at about 10 ~ 200,000 tons.
In the process of tunnel kiln reduction material, for preventing product to be oxidized, need to control the kiln end temperature of reduction section rear end.But, existing tunnel cave ubiquity cools the defect of weak effect, in reduction process, kiln end temperature is up to about 1200 DEG C, dedusting, sulfur removal technology is carried out again after needing that cooling process is carried out to kiln tail, cause production efficiency low, increase the energy resource consumption of the invalid utilization of tunnel cave simultaneously, cause production cost to increase.
Summary of the invention
For effectively reducing energy consumption, realizing tunnel kiln tail and cooling, saving production cost, the utility model proposes a kind of tunnel kiln tail cooling-cycle device for DRI.
For this reason, the technical solution of the utility model is: tunnel kiln tail cooling-cycle device, is characterized in that: comprise cooling body, residual heat recovery mechanism;
Described cooling body is arranged along kiln tail fore-and-aft direction, cooling body comprises first, the second at least two heat exchangers, first, the second two heat exchanger serial connections, the exhaust outlet that the import of First Heat Exchanger is provided with by the anterior sidewall of pipeline and kiln tail is communicated with, the outlet of the second heat exchanger is provided with the first air-heater, the air outlet of the first air-heater is provided with heating pipe threeway, an outlet of heating pipe threeway is provided with the first spray cooling device, another outlet of heating pipe threeway is provided with the 3rd heat exchanger, the outlet of the 3rd heat exchanger is provided with the second air-heater, the air outlet of the second air-heater is provided with the second spray cooling device, described first spray cooling device, second spray cooling device is located at top in the middle part of kiln tail successively, during use, in First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, circulation is connected with cooling water,
Described residual heat recovery mechanism and the reverse setting of cooling body, residual heat recovery mechanism comprises the 3rd air-heater, combustion fan; The air entry that 3rd air-heater air inlet is provided with kiln tail center top is communicated with, and the air outlet of the 3rd air-heater stretches into kiln tail inside by pipeline, makes the unnecessary hot gas reverse press-in kiln tail front portion recycling in the middle part of kiln tail during use by the 3rd air-heater; It is outside that combustion fan is located at kiln tail, and combustion fan air outlet is extended to after being communicated with the second heat exchanger by pipeline and reduce burner place, the unnecessary hot gas in the second heat exchanger is pressed into reduce burner to carry out burning recycles during use by combustion fan.
One for technique scheme is improved and is: for improving material reduction effect, described cooling body also comprises the smoke exhaust fan being located at kiln tail rear portion, smoke exhaust fan is communicated with kiln tail top by pipeline, by smoke exhaust fan, the oxidizing gas in kiln is expelled from kiln during use, prevent the material after reducing to again be oxidized.
Operation principle:
In material reduction process, the high-temperature flue gas that kiln tail is anterior about 900 DEG C enters First Heat Exchanger by the exhaust outlet that kiln tail sidewall is provided with and be cooled to about 650 DEG C after cooling, and the flue gas of about 650 DEG C enters the second heat exchanger again and be cooled to about 400 DEG C after cooling; The flue gas of about 400 DEG C is introduced into the first spray cooling device through the first air-heater rear portion, cools the material entered in this stage kiln tail; Another part is introduced into the 3rd heat exchanger and is cooled to about 100 DEG C after again cooling, and then introduces the second spray cooling device through the second air-heater back, cools further the material entered in this stage kiln tail.Simultaneously, excessive gas in kiln tail postmedian enters the 3rd air-heater by the air entry that kiln tail center top is provided with, after the 3rd air-heater reclaims, the reverse kiln of press-in by force tail is anterior, the material entered in this stage kiln tail is cooled, the like this and reverse cyclic alternate-running of material direct of travel.In addition, being communicated with the second heat exchanger by arranging combustion fan, sending into reduction burner place after being reclaimed by the waste hot air in heat exchanger by force and carrying out burning recycling.
Beneficial effect:
The utility model is by the cooling body by multiple heat exchanger, air-heater, spray cooling device serial connection formation tunnel kiln tail cooling-cycle device, during use, the exhaust outlet that anterior to the front end of cooling body and kiln tail sidewall is provided with is communicated with, introduce kiln tail postmedian through air-heater after the feature utilizing hot gas upwards to flow makes the high temperature hot gas of kiln tail front portion enter heat exchanger cooling to be cooled material by spray cooling device, achieve the recycling of heat, make the temperature in this section of kiln tail obtain effective reduction simultaneously; By arranging air-heater and combustion fan formation residual heat recovery mechanism in addition, air-heater is utilized to be reclaimed by the unnecessary hot gas in the middle part of kiln tail during use, then reverse press-in kiln tail is anterior, carry out cold to the material in this section of kiln tail, by combustion fan, the unnecessary high-temperature flue gas in heat exchanger is reclaimed reverse press-in reduction burner place simultaneously and carry out burning recycling, the repetitive cycling achieving heat utilizes, and reduces energy loss.The air-heater arranged in device can to the adjustment of flue-gas temperature and air quantity, and heat waste is few, energy-conserving and environment-protective, conveniently controls the temperature in kiln tail, improves material reduction effect.The arrangement increases capacity usage ratio, energy consumption is low, saves production cost; Obviously, good cooling results, improves product also proper mass in cooling.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Number in the figure is: 1, kiln tail; 2, First Heat Exchanger; 3, the second heat exchanger; 4, exhaust outlet; 5, the first air-heater; 6, heating pipe threeway; 7, the first spray cooling device; 8, the 3rd heat exchanger; 9, the second air-heater; 10, the second spray cooling device; 11, the 3rd air-heater; 12, combustion fan; 13, air entry; 14, waste heat pipeline; 15, smoke exhaust fan.
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 tunnel kiln tail cooling-cycle device, comprises cooling body, residual heat recovery mechanism, described cooling body is arranged along the fore-and-aft direction of kiln tail 1, cooling body comprises First Heat Exchanger 2, second heat exchanger 3, First Heat Exchanger 2 is connected in series with the second heat exchanger 3, the exhaust outlet 4 that the import of First Heat Exchanger 2 is provided with by pipeline and the anterior sidewall of kiln tail 1 is communicated with, the first air-heater 5 is provided with by pipeline in the outlet of the second heat exchanger 3, heating pipe threeway 6 is provided with by pipeline at the air outlet of the first air-heater 5, the first spray cooling device 7 is provided with in an outlet of heating pipe threeway 6, the 3rd heat exchanger 8 is provided with in another outlet of heating pipe threeway 6, the second air-heater 9 is provided with by pipeline in the outlet of the 3rd heat exchanger 8, the second spray cooling device 10 is provided with at the air outlet of the second air-heater 9, by described first spray cooling device 7 during use, second spray cooling device 10 is located at above the middle part of kiln tail 1 successively, during use, in described First Heat Exchanger 2, second heat exchanger 3, the 3rd heat exchanger 8, circulation is connected with cooling water, to improve cooling effect, described residual heat recovery mechanism and the reverse setting of cooling body, residual heat recovery mechanism comprises the 3rd air-heater 11, combustion fan 12, the air entry 13 that air inlet and kiln tail 1 center top of the 3rd air-heater 11 are provided with is communicated with, the air outlet of the 3rd air-heater 11 stretches into kiln tail inside by pipeline, by the 3rd air-heater 11, the unnecessary hot gas reverse press-in kiln tail front portion in the middle part of kiln tail 1 is reused during use, combustion fan 12 is located at the outside of kiln tail 1, extend to after the air outlet of combustion fan 12 is communicated with the second heat exchanger 3 by waste heat pipeline 14 and reduce burner place, make the reverse press-in reduction of the unnecessary hot gas in the second heat exchanger 3 burner carry out burning by combustion fan 12 during use and recycle.
As shown in Figure 1, in order to improve material reduction effect, described cooling body also comprises the smoke exhaust fan 15 being located at kiln tail 1 rear portion, smoke exhaust fan 15 is communicated with by the top of pipeline with kiln tail 1, make the oxidizing gas of kiln tail inside be discharged to outside kiln by smoke exhaust fan 15 during use, prevent the material after reducing to again be oxidized.
First Heat Exchanger described in the utility model, the second heat exchanger, the 3rd heat exchanger are shell-and-tube heat exchanger, and during use, high-temperature flue gas enters in heat exchanger shell and carries out exchange heat with the cooling water in heat exchanger tube, flows out after making cooling high-temperature flue gas.
First air-heater described in the utility model, the second air-heater, the 3rd air-heater can realize high-temperature flue gas to be continued to flow into, and can control, handled easily to temperature and air quantity.
First spray cooling device described in the utility model, the second spray cooling device are by being mixed in forced draft by a small amount of water, form vaporific gas-liquid two-phase fluid, produce jet by spraying, be ejected into material cooling zone, make the material after reduction obtain abundant Cooling and Lubricator.
When this cooling-cycle device uses in material reduction process, the high-temperature flue gas that kiln tail is anterior 900 DEG C enters First Heat Exchanger by the exhaust outlet that kiln tail sidewall is provided with and be cooled to 650 DEG C after cooling, and the flue gas of 650 DEG C enters the second heat exchanger again and be cooled to 400 DEG C after cooling; The flue gas of 400 DEG C is introduced into the first spray cooling device through the first air-heater rear portion, cools the material entered in this stage kiln tail; Another part is introduced into the 3rd heat exchanger and is cooled to 100 DEG C after again cooling, and then introduces the second spray cooling device through the second air-heater back, cools further the material entered in this stage kiln tail.Simultaneously, excessive gas in kiln tail postmedian enters the 3rd air-heater by the air entry that kiln tail center top is provided with, after the 3rd air-heater reclaims, the reverse kiln of press-in by force tail is anterior, the material entered in this stage kiln tail is cooled, the like this and reverse cyclic alternate-running of material direct of travel.In addition, being communicated with the second heat exchanger by arranging combustion fan, sending into reduction burner place after being reclaimed by the waste hot air in heat exchanger by force and carrying out burning recycling.
The utility model is by the cooling body by multiple heat exchanger, air-heater, spray cooling device serial connection formation tunnel kiln tail cooling-cycle device, during use, the exhaust outlet that anterior to the front end of cooling body and kiln tail sidewall is provided with is communicated with, introduce kiln tail postmedian through air-heater after the feature utilizing hot gas upwards to flow makes the high temperature hot gas of kiln tail front portion enter heat exchanger cooling to be cooled material by spray cooling device, achieve the recycling of heat, make the temperature in this section of kiln tail obtain effective reduction simultaneously; By arranging air-heater and combustion fan formation residual heat recovery mechanism in addition, air-heater is utilized to be reclaimed by the unnecessary hot gas in the middle part of kiln tail during use, then reverse press-in kiln tail is anterior, carry out cold to the material in this section of kiln tail, by combustion fan, the unnecessary high-temperature flue gas in heat exchanger is reclaimed reverse press-in reduction burner place simultaneously and carry out burning recycling, the repetitive cycling achieving heat utilizes, and reduces energy loss.The air-heater arranged in device can to the adjustment of flue-gas temperature and air quantity, and heat waste is few, energy-conserving and environment-protective, conveniently controls the temperature in kiln tail, improves material reduction effect.The arrangement increases capacity usage ratio, energy consumption is low, cost-saving; Obviously, good cooling results, improves product also proper mass in cooling.
Claims (2)
1. tunnel kiln tail cooling-cycle device, is characterized in that: comprise cooling body, residual heat recovery mechanism;
Described cooling body is arranged along kiln tail fore-and-aft direction, cooling body comprises first, the second at least two heat exchangers, first, the second two heat exchanger serial connections, the exhaust outlet that the import of First Heat Exchanger is provided with by the anterior sidewall of pipeline and kiln tail is communicated with, the outlet of the second heat exchanger is provided with the first air-heater, the air outlet of the first air-heater is provided with heating pipe threeway, an outlet of heating pipe threeway is provided with the first spray cooling device, another outlet of heating pipe threeway is provided with the 3rd heat exchanger, the outlet of the 3rd heat exchanger is provided with the second air-heater, the air outlet of the second air-heater is provided with the second spray cooling device, described first spray cooling device, second spray cooling device is located at top in the middle part of kiln tail successively, during use, in First Heat Exchanger, the second heat exchanger, the 3rd heat exchanger, circulation is connected with cooling water,
Described residual heat recovery mechanism and the reverse setting of cooling body, residual heat recovery mechanism comprises the 3rd air-heater, combustion fan; The air entry that 3rd air-heater air inlet is provided with kiln tail center top is communicated with, and the air outlet of the 3rd air-heater stretches into kiln tail inside by pipeline, makes the unnecessary hot gas reverse press-in kiln tail front portion recycling in the middle part of kiln tail during use by the 3rd air-heater; It is outside that combustion fan is located at kiln tail, and combustion fan air outlet is extended to after being communicated with the second heat exchanger by pipeline and reduce burner place, the unnecessary hot gas in the second heat exchanger is pressed into reduce burner to carry out burning recycles during use by combustion fan.
2. tunnel kiln tail cooling-cycle device according to claim 1, it is characterized in that: described cooling body also comprises the smoke exhaust fan being located at kiln tail rear portion, smoke exhaust fan is communicated with kiln tail top by pipeline, by smoke exhaust fan, the oxidizing gas in kiln is expelled from kiln during use, prevent the material after reducing to again be oxidized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520439875.1U CN204787783U (en) | 2015-06-25 | 2015-06-25 | Tunnel cave kiln tail refrigeration cycle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520439875.1U CN204787783U (en) | 2015-06-25 | 2015-06-25 | Tunnel cave kiln tail refrigeration cycle device |
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| Publication Number | Publication Date |
|---|---|
| CN204787783U true CN204787783U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520439875.1U Expired - Fee Related CN204787783U (en) | 2015-06-25 | 2015-06-25 | Tunnel cave kiln tail refrigeration cycle device |
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| Country | Link |
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| CN (1) | CN204787783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854684A (en) * | 2016-12-27 | 2017-06-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | One kind is used for iron ore magnetizing roast tunnel cave and iron ore magnetizing roast method |
-
2015
- 2015-06-25 CN CN201520439875.1U patent/CN204787783U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854684A (en) * | 2016-12-27 | 2017-06-16 | 甘肃酒钢集团宏兴钢铁股份有限公司 | One kind is used for iron ore magnetizing roast tunnel cave and iron ore magnetizing roast method |
| CN106854684B (en) * | 2016-12-27 | 2018-11-23 | 甘肃酒钢集团宏兴钢铁股份有限公司 | One kind being used for iron ore magnetizing roast tunnel oven and iron ore magnetizing roast method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20190625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |