CN102748943A - Waste heat utilization technology for metallurgical tunnel kiln - Google Patents
Waste heat utilization technology for metallurgical tunnel kiln Download PDFInfo
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- CN102748943A CN102748943A CN201210208445XA CN201210208445A CN102748943A CN 102748943 A CN102748943 A CN 102748943A CN 201210208445X A CN201210208445X A CN 201210208445XA CN 201210208445 A CN201210208445 A CN 201210208445A CN 102748943 A CN102748943 A CN 102748943A
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Abstract
The invention provides a waste heat utilization technology for a metallurgical tunnel kiln. A plurality of air inlets (3) are respectively arranged in outer walls of a cooling section (4) on the left side and the right side of a tunnel kiln body (5) with dual-layer hollow walls. Air outlets are connected with air suction pipes (121) of a fan (6) and the air suction pipes (121) are connected and communicated with a main air suction pipe (12). An air deliver pipe (13) of the fan is connected with the internal part of a refined iron powder drying oven (7) which is arranged beside the tunnel kiln. Since the fan is used for directly sucking cold air into the cooling section of the kiln body and drawing out high-temperature hot air, the temperature of the cooling section can be rapidly reduced; and the drawn-out high-temperature hot air is fed into the refined iron powder drying oven (7) to dry wet refined iron powder which is required to be dried by additionally burning coal, the dual energy-saving technical effects of not only reducing the temperature of the cooling section of the kiln body but also using the high-temperature hot air to dry the refined iron powder are reached, and the goals of the waste heat utilization technology are realized.
Description
Technical field
What the present invention relates to is the tunnel cave in the metallurgical industry, especially a kind of surplus, waste heat utilization technology that is applied to metallurgical tunnel cave.
Background technology
In metallurgical industry, sponge iron manufacturing enterprise belongs to the energy consumption rich and influential family, and its main energy consumption operation is respectively the smart powder drying oven of hyperthermia tunnel Kiln and iron.Because coal expense shared ratio in the enterprise production cost is very big, therefore, energy-saving and emission-reduction are technological emphasis of paying special attention to all the year.
At present; Domestic sponge iron manufacturer adopts Water Cooling Technology mostly to the cooling of tunnel kiln body cooling section; In cooling section kiln body, install 2 exactly---3 joint metal recirculated water ice chests; Drain the heat exchange method of hot water and reduce kiln body cooling section temperature through injecting cold water, to prevent or to reduce the sponge iron oxidation fast in this section kiln body after the calcining.This cooling technology has following drawback:
(1), the water-cooled case is static, can only absorb the in-plant hot-air heat of casing periphery, limited to the cooling-down effect of kiln body, the temperature of panel kiln body is still up to more than 600 ℃.The oxidation rate that experiment showed, sponge iron when temperature reaches 575 ℃ is obviously accelerated.Therefore, the traditional water refrigeration technique can't satisfy the cooling demand, has directly caused the secondary oxidation of sponge iron, and defect rate is high, and production efficiency is low.(2), recirculated water re-injects the water-cooled case after need sending into cooling tower cooling with water pump, great amount of heat energy spills into atmosphere, energy waste is serious.
In sum, how can in to the cooling of kiln body cooling section, can the heat energy of being fallen effectively be used again and go in the production, reach the technical purpose of energy-saving and emission-reduction, be the insoluble for a long time research of technique content in this area.
Summary of the invention
The technical problem that the present invention will solve provides a kind of surplus, waste heat utilization technology that is applied to metallurgical tunnel cave, and its facility comprises the tunnel cave body with double-layer hollow wall; Specifically be on the outer wall of the cooling section of the tunnel cave body the right and left with double-layer hollow wall, several air inlets are set respectively, be arranged on the aspiration channel that air outlet on the tunnel cave body connects blower fan, aspiration channel is connected perforation with total aspiration channel; The ajutage of blower fan is connected and is arranged in the smart powder drying oven of the other iron of said tunnel cave.After adopting this air-cooled measure, blower fan is directly taken high-temperature hot air away in cooling section kiln body, and sends into the smart powder drying oven of iron on one side, is by the smart powder of the moist iron of crawler belt transmission in the drying oven, sends the high-temperature hot air that comes to it is dried.Compare with the water-cooled case that prior art is static, because cold wind directly sucks from several air inlets that the outer wall of cooling section kiln body is provided with, dynamic cold and hot air flows rapidly, has reduced here temperature fast and significantly; And then again the high-temperature hot air of extracting out is sent in the smart powder drying oven of iron; Script is needed the smart powder oven dry of the coal-fired in addition moist iron that could dry; Reach the power-saving technology effect that Waste Heat Recovery is utilized, realized the goal of the invention that is applied to surplus, the waste heat utilization technology of metallurgical tunnel cave of the present invention.
Construction for ease, said aspiration channel should be arranged on kiln body double-layer hollow wall top.
In order to reduce cooling section kiln temperature sooner, the said air outlet that is arranged on the right and left kiln body should be two to three respectively, is total up to four to six, and is connected perforation with a total aspiration channel respectively.
The air inlet that is arranged on metope of tunnel cave body is five to eight, and both sides add up to ten to 16, and their bore is respectively 130mm * 130mm, and the power of fan that then is complementary is 4kw.
Below in conjunction with accompanying drawing the present invention is further specified.
Description of drawings
Fig. 1 is the overall structure and the schematic flow sheet of said technology
The specific embodiment
Can see that from analysing and observe partly of Fig. 1 tunnel cave body 5 is the double-deck bodies of wall that have voided layer 2, what be positioned at the kiln body is kiln car 1.On the outer wall of cooling section 4 positions of said kiln body the right and left, be provided with several air inlets 3, cold air is inhaled into kiln body voided layer from here.On the hollow kiln wall of kiln body top the right and left; Two totally four aspiration channels 121 are set respectively; And be aggregated in total aspiration channel 12; Hot-air (shown in arrow) in the hollow wall is sucked by 4kw blower fan 6, via ajutage 13 temperature of drawing is sent into up to 200 ℃ high-temperature hot air then to be arranged in the other drying oven 7 of tunnel cave.Filler funnel 10 all is spread out in the smart powder of the iron of humidity on the conveyer belt 9, after power Kun 11 rotates the smart powder of iron is slowly sent into drying oven, and when conveyer belt slowly arrived the drying oven other end, the smart powder of iron was dried, and falls into the pipeline 8 interior subsequent processings that arrive.
After adopting above-mentioned surplus, the waste heat utilization technology that is applied to metallurgical tunnel cave, through measuring, kiln body cooling section temperature has been reduced to below 450 ℃, has effectively controlled the oxidation of sponge iron.The hot-air in the exit of ajutage 13 is about 200 ℃; Flow is 4000m3, can practice thrift about 1.5 tons of bottle coal every day with the smart powder oven dry of 30 tons moisture 7% iron to moisture≤0.02% in 24 hours; Annual 540 tons of the fire coals of practicing thrift; The smart powder oven dry of the former iron labour of workshop section 5 people are saved in about 50 tons of using water wisely, and discharge, optimized outside the air quality at a large amount of SO2 of minimizing and CO2; Improved the quality of sponge iron, realized that the present invention is applied to the goal of the invention of surplus, the waste heat utilization technology of metallurgical tunnel cave.
Claims (4)
1. surplus, waste heat utilization technology that is applied to metallurgical tunnel cave; Comprise tunnel cave body (5) with double-layer hollow wall; It is characterized in that: on the outer wall of the cooling section (4) of tunnel cave body (5) the right and left with double-layer hollow wall; Several air inlets (3) are set respectively, are arranged on the aspiration channel (121) of the air outlet connection blower fan (6) on the tunnel cave body (5), aspiration channel (121) is connected perforation with total aspiration channel (12); The ajutage (13) of blower fan (6) is connected and is arranged in the said tunnel cave smart powder drying oven of other iron (7).
2. surplus, the waste heat utilization technology that is applied to metallurgical tunnel cave as claimed in claim 1 is characterized in that: aspiration channel (121) is arranged on the top of the cooling section (4) of said tunnel cave body (5) the right and left with double-layer hollow wall.
3. surplus, the waste heat utilization technology that is applied to metallurgical tunnel cave as claimed in claim 2 is characterized in that: aspiration channel (121) is four, and they all connect with aspiration channel total pipeline (12).
4. like claim 1---3 each described surplus, waste heat utilization technology that are applied to metallurgical tunnel cave; It is characterized in that: the air inlet (3) that is arranged on (5) metopes of tunnel cave body is five to eight; Both sides add up to ten to 16; Their bore is 130mm * 130mm, and the power of fan that then is complementary is 4kw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210208445XA CN102748943A (en) | 2012-06-14 | 2012-06-14 | Waste heat utilization technology for metallurgical tunnel kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210208445XA CN102748943A (en) | 2012-06-14 | 2012-06-14 | Waste heat utilization technology for metallurgical tunnel kiln |
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| CN102748943A true CN102748943A (en) | 2012-10-24 |
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| CN201210208445XA Pending CN102748943A (en) | 2012-06-14 | 2012-06-14 | Waste heat utilization technology for metallurgical tunnel kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759543A (en) * | 2013-12-30 | 2014-04-30 | 湖南省醴陵市科发窑炉热工设备有限公司 | Waste heat utilization structure for tunnel kiln cooling area |
| CN105937854A (en) * | 2016-02-03 | 2016-09-14 | 石嘴山市宝马兴庆特种合金有限公司 | Application of air cooling technology to electric furnace |
| CN105973007A (en) * | 2016-06-24 | 2016-09-28 | 常德天厦建材有限公司 | Furnace device and method utilizing furnace device to manufacture sintered bricks |
Citations (7)
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| GB552878A (en) * | 1941-12-04 | 1943-04-28 | Gen Motors Corp | Improvements relating to tunnel kilns for firing ceramic ware |
| JPS56133580A (en) * | 1980-03-10 | 1981-10-19 | Hitachi Shipbuilding Eng Co | Heat recovery of tunnel furnace |
| CN101298962A (en) * | 2008-06-20 | 2008-11-05 | 东北大学 | Classification recovery and step utilizing method of residual heat resources in sintering process |
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| CN202648384U (en) * | 2012-06-14 | 2013-01-02 | 安徽省六安市佳瑞粉末冶金有限公司 | Surplus and waste heat utilization technology applied to metallurgy tunnel |
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2012
- 2012-06-14 CN CN201210208445XA patent/CN102748943A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB552878A (en) * | 1941-12-04 | 1943-04-28 | Gen Motors Corp | Improvements relating to tunnel kilns for firing ceramic ware |
| JPS56133580A (en) * | 1980-03-10 | 1981-10-19 | Hitachi Shipbuilding Eng Co | Heat recovery of tunnel furnace |
| CN201233183Y (en) * | 2008-05-14 | 2009-05-06 | 北京创导高科绝热材料有限公司 | Waste heat recovery system for tunnel kiln |
| CN101298962A (en) * | 2008-06-20 | 2008-11-05 | 东北大学 | Classification recovery and step utilizing method of residual heat resources in sintering process |
| CN201293557Y (en) * | 2008-10-15 | 2009-08-19 | 王玉福 | Tunnel kiln with intensive cooling apparatus |
| CN201583131U (en) * | 2009-11-09 | 2010-09-15 | 寿阳县明鑫铝矾耐火材料有限公司 | Afterheat utilization system of tunnel furnace |
| CN202648384U (en) * | 2012-06-14 | 2013-01-02 | 安徽省六安市佳瑞粉末冶金有限公司 | Surplus and waste heat utilization technology applied to metallurgy tunnel |
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| 徐培勋等: "新型高温隧道窑的设计与应用", 《耐火材料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759543A (en) * | 2013-12-30 | 2014-04-30 | 湖南省醴陵市科发窑炉热工设备有限公司 | Waste heat utilization structure for tunnel kiln cooling area |
| CN105937854A (en) * | 2016-02-03 | 2016-09-14 | 石嘴山市宝马兴庆特种合金有限公司 | Application of air cooling technology to electric furnace |
| CN105937854B (en) * | 2016-02-03 | 2018-10-09 | 石嘴山市宝马兴庆特种合金有限公司 | The method for reducing ferroalloy smelting electric furnace water consumption |
| CN105973007A (en) * | 2016-06-24 | 2016-09-28 | 常德天厦建材有限公司 | Furnace device and method utilizing furnace device to manufacture sintered bricks |
| CN105973007B (en) * | 2016-06-24 | 2018-07-31 | 常德天厦建材有限公司 | A kind of furnace equipment and the method using its making fired brick |
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Application publication date: 20121024 |