CN102538486B - Ventilation fixed screen device of circular cooler - Google Patents
Ventilation fixed screen device of circular cooler Download PDFInfo
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- CN102538486B CN102538486B CN 201210013587 CN201210013587A CN102538486B CN 102538486 B CN102538486 B CN 102538486B CN 201210013587 CN201210013587 CN 201210013587 CN 201210013587 A CN201210013587 A CN 201210013587A CN 102538486 B CN102538486 B CN 102538486B
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Abstract
The invention discloses a ventilation fixed screen device of a circular cooler. The ventilation fixed screen device comprises a supporting seat, a screen beam, a cross beam and a screen cap which are located in a kiln hood; a ventilation pipe 2, a fan 1 and valves 3 are further arranged outside the kiln hood. The cross beam is naturally placed on the supporting seat; the two ends of the cross beam extend out of the kiln hood; one end of the cross beam is used for air inlet, is provided with the valves 3, is connected with the ventilation pipe 2, and is provided with air by the fan 1; the other end of the cross beam is used for air outlet, an air outlet is connected with a section of a hot air return pipe of the circular cooler so as to guide hot air back to a production system; an air inlet pipe end of the screen beam is provided with the valves 3, is connected with the ventilation pipe 2, and is provided with air by the fan 1; an air outlet of the screen beam is located in the kiln hood; and the hot air participates in fuel combustion by directly serving as primary air. The weld seams of the screen beam and the cross beam of the ventilation fixed screen device may crack due to the repeated severe temperature change between high temperature and normal temperature, the normal production is not affected because the screen beam and the cross beam are used for ventilation, and no energy consumption is increased because the hot air enters again for production. Protecting sheets can also be arranged to protect a granular refractory material filled around the supporting seat, so as to facilitate repair and maintenance.
Description
Technical field
The invention belongs to steel and iron industry pelletizing field of engineering technology, be specifically related to the ventilation fixed screen device of circular cooler in a kind of iron ore pellet engineering.
Background technology
Central cooler is the capital equipment in the grate-kiln pelletizing process engineering, for the iron ore pellets of heat is cooling, reclaim heat energy and does the secondary utilization.The gravity flow screen device is the important component part of central cooler equipment, is used for preventing that the pelletizing bulk from falling circular cooler trolley, thereby causes the chassis upset ineffective, and discharging is not smooth.
The gravity flow screen device mainly is divided into two kinds at present: solid gravity flow screen and water flowing gravity flow screen, solid gravity flow screen are mainly used in producing per year the small-sized pelletizing engineering of 600,000 tons of left and right, and the water flowing gravity flow screen is mainly used in medium-and-large-sized pelletizing engineering.Be hot mineral aggregate when iron ore pellets goes out rotary kiln to central cooler, temperature is more than 1150 ℃, so gravity flow screen should be high temperature resistant, wear-resisting, and enough intensity is arranged again, unlikely appearance bending, fracture under bulk pelletizing and deadweight.
For solid gravity flow screen,, elevated temperature strength high temperature resistant, wear-resisting owing to satisfying and life requirements, the material requirements of therefore selecting is quite high, but the service life of present solid gravity flow screen is still about 1 year, because material is solid construction, because of reasons such as elevated temperature strengths, side sway and flexible deformation easily appear in solid gravity flow screen sieve beam and crossbeam, thereby make the fixing instructions for use of not satisfying; Want whole the taking-up when solid gravity flow screen is changed, then change, solid gravity flow screen sieve beam is more than 400KG, and crossbeam is heavier, and due to the installation site spatial relationship, it is unfavorable to lift, and changes the engineering time longer, is unfavorable for continuous production, seems very inconvenient.
In order to overcome the above-mentioned shortcoming of solid gravity flow screen, the water flowing gravity flow screen is designed to use, the water flowing gravity flow screen adopts the water flowing mode to lower the temperature, after the temperature of sieve beam and crossbeam reduces, temperature strength rises, and sieve beam and crossbeam add the sieve cap that exotic material is made, and the sieve cap is mainly used in wear-resisting, and because sieve cap monomer weight is less, it is convenient to change in the time between overhauls(TBO) at engineering equipment.Water flowing sieve beam is permanent beam, require firm welding, water-tight, the repeatedly violent variations in temperature between central cooler high temperature and normal temperature, weld seam is easily ftractureed, leakage accident occurs, water at high temperature gasifies, and leakage accident is in case occur, to produce serious consequence, necessary stop production to overhaul overhauls construction period this moment inevitable very long, is unfavorable for producing; Due to the water flowing cooling, hot water can not recycle in production system simultaneously, a large amount of heats must be derived production system, has increased energy consumption.
Summary of the invention
In order to overcome the technical deficiency of existing water flowing central cooler gravity flow screen, the invention provides a kind of making and produce the ventilation fixed screen device smooth and easy, that energy consumption is low.
The technical solution adopted for the present invention to solve the technical problems is:
Ventilation fixed screen device of circular cooler of the present invention comprises bearing, sieve beam, crossbeam, the sieve cap that is positioned at kiln head cover, also is provided with ventilation duct, blower fan and valve outside kiln head cover.
Kiln head cover is fixed on central cooler steel platform, and bearing is fixed in kiln head cover, and crossbeam is shelved on bearing naturally, two pass-out kiln head cover, and an end air intake, this end arranges valve, connects ventilation duct, by the blower fan air feed; Other end air-out, one section backheat airduct of air outlet and central cooler is connected, and hot blast is led go back to the production system.Sieve Liang Yiduan is shelved on crossbeam, and an end is shelved on bearing, on sieve beam and crossbeam, the sieve cap is housed all, and sieve beam air intake pipe end arranges valve, connects ventilation duct, and by the blower fan air feed, the air outlet of sieve beam is in kiln head cover, and hot blast directly participates in fuel combustion as a wind.
At least two sieve caps further are housed on sieve beam and crossbeam in kiln head cover;
The granular refractory material of filling around backplate protection bearing can also be set.
The sieve beam of ventilation fixed screen and the crossbeam repeatedly violent variations in temperature between high temperature and normal temperature also may cause weld cracking, and because being ventilates, cracking does not affect normal production, and hot blast reenters production, does not increase energy consumption.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
The specific embodiment
1 the present invention is described further by reference to the accompanying drawings:
Ventilation fixed screen device of circular cooler is the sieve beam of gravity flow screen and crossbeam to be carried out aeration-cooling, increases the temperature strength of gravity flow screen, by design, the hot blast of heat exchange is imported production system again simultaneously, reduces energy consumption.
Ventilation fixed screen device of circular cooler of the present invention mainly is comprised of parts such as bearing, sieve beam, crossbeam, sieve cap, blower fan 1, ventilation duct 2, valves 3.
Bearing is fixed in the rotary kiln head-shield, and the rotary kiln head-shield is fixed on again on central cooler steel platform, and crossbeam is shelved on bearing naturally, two pass-out kiln head cover, and an end air intake, this end arranges valve 3, connects ventilation duct 2, by blower fan 1 air feed; One brings out wind, and air outlet joins with one section backheat airduct of central cooler again, and hot blast is led go back to the production system.
Sieve Liang Yiduan is shelved on crossbeam, one end is shelved on bearing, by design configurations, at least two sieve caps are housed on sieve beam and crossbeam, sieve beam blast pipe arranges valve 3, connects ventilation duct 2, by blower fan 1 air feed, the air outlet of sieve beam is in the rotary kiln head-shield, and hot blast directly participates in fuel combustion as a wind.
Fill granular refractory material around bearing, then with the backplate protection, also facilitate repair and maintenance.
Claims (3)
1. ventilation fixed screen device of circular cooler, comprise the bearing, sieve beam, crossbeam, the sieve cap that are positioned at kiln head cover, it is characterized in that: also be provided with ventilation duct (2), blower fan (1) and valve (3) outside kiln head cover, crossbeam is shelved on bearing naturally, two pass-out kiln head cover, one end air intake, this end arranges valve (3), connect ventilation duct (2), by blower fan (1) air feed, other end air-out, one section backheat airduct of air outlet and central cooler is connected, and hot blast is led go back to the production system; Sieve beam air intake pipe end arranges valve (3), connects ventilation duct (2), and by blower fan (1) air feed, the air outlet of sieve beam is in kiln head cover, and hot blast directly participates in fuel combustion as a wind.
2. according to ventilation fixed screen device of circular cooler claimed in claim 1, it is characterized in that: in kiln head cover, each sieve beam and crossbeam are provided with at least two sieve caps.
3. according to claim 1 or 2 described ventilation fixed screen device of circular coolers, it is characterized in that: the backplate that is provided with the granular refractory material of filling around the protection bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210013587 CN102538486B (en) | 2012-01-17 | 2012-01-17 | Ventilation fixed screen device of circular cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210013587 CN102538486B (en) | 2012-01-17 | 2012-01-17 | Ventilation fixed screen device of circular cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102538486A CN102538486A (en) | 2012-07-04 |
| CN102538486B true CN102538486B (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210013587 Active CN102538486B (en) | 2012-01-17 | 2012-01-17 | Ventilation fixed screen device of circular cooler |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292603B (en) * | 2013-06-21 | 2014-11-12 | 江苏华能冶金工程技术有限公司 | Annular-cooler non-pressure water-cooling grating beam |
| CN103822481B (en) * | 2014-03-21 | 2016-01-06 | 秦皇岛西重所燕大重型机械研究院有限公司 | Exhausting cooled upper-supporting wheel axle drying grate |
| CN108106414A (en) * | 2017-12-13 | 2018-06-01 | 北京首钢国际工程技术有限公司 | A kind of full manage-style cold type gravity flow screen with heat-proof device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6220837A (en) * | 1985-07-19 | 1987-01-29 | Kobe Steel Ltd | Granule sorting device of heat exchange installation for granule packed layer |
| DE4242374A1 (en) * | 1992-01-31 | 1993-08-05 | Kloeckner Humboldt Deutz Ag | |
| CN2499140Y (en) * | 2001-08-31 | 2002-07-10 | 邯郸钢铁股份有限公司 | Fixed sieving device for sintering machine |
| CN201443957U (en) * | 2009-07-28 | 2010-04-28 | 中冶北方工程技术有限公司 | Rotary kiln combined type fixed screen |
| CN202420213U (en) * | 2012-01-17 | 2012-09-05 | 常熟市华能环保工程有限公司 | Air draft fixed screen device for circular cooler |
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| CN102538486A (en) | 2012-07-04 |
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Address after: 215500 Jiangsu city of Suzhou province Changshou City Tonglinlu No. 1 Patentee after: JIANGSU XINHUANNENG ENVIRONMENT PROTECTION ENGINEERING CO., LTD. Address before: 215500 Jiangsu city of Suzhou province Changshou City Tonglinlu No. 1 Patentee before: Huaneng Environment Protection Engineering Co., Ltd., Changshu |