CN202420213U - Air draft fixed screen device for circular cooler - Google Patents
Air draft fixed screen device for circular cooler Download PDFInfo
- Publication number
- CN202420213U CN202420213U CN2012200208491U CN201220020849U CN202420213U CN 202420213 U CN202420213 U CN 202420213U CN 2012200208491 U CN2012200208491 U CN 2012200208491U CN 201220020849 U CN201220020849 U CN 201220020849U CN 202420213 U CN202420213 U CN 202420213U
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- China
- Prior art keywords
- air
- screen
- sieve
- cross beam
- gravity flow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an air draft fixed screen device for a circular cooler, which includes a support, screen beams, a cross beam and screen caps that are arranged in a kiln head cover; and further, a draft tube 2, a blower 1 and valves 3 are arranged outside the kiln head cover. The cross beam is naturally placed on the support with two ends extending out of the kiln head cover, wherein one end of the cross beam is used as an air inlet, is provided with a valve 3, is communicated with the draft tube 2, and is supplied by the blower 1 with air, and meanwhile, the other end of the cross beam is used as an air outlet; the air outlet is connected with a section of a warm air return pipe to guide hot air back into a production system; the air inlet pipe ends of the screen beams are also provided with valves 3, are connected with the draft tube 2, and are supplied by the blower with air; air outlets of the screen beams are arranged inside the kiln head cover, and warm air is directly used as primary air to participate in material combustion; multiple times of violent temperature variation of the screen beams and the cross beam of the fixed screen between the high temperature and the normal temperature may cause weld failures; however, as the air draft fixed screen is adopted, the normal production is free from influences, and warm air is used in the production again, so that energy consumption is not increased. Moreover, protective plates can be arranged to protect particle fireproofing material filled around the support, so that the overhaul and maintenance are facilitated.
Description
Technical field
The utility model belongs to steel and iron industry pelletizing field of engineering technology, is specifically related to the central cooler ventilation gravity flow screen device in a kind of iron ore pellet engineering.
Background technology
Central cooler is the capital equipment in the grate kiln pelletizing engineering, is used for the iron ore pellets cooling with heat, reclaims heat energy and makes second use.The gravity flow screen device is the important component part of central cooler equipment, is used to prevent 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 produces about 600,000 tons small-sized pelletizing engineering per year, 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, crooked, the fracture of unlikely appearance under bulk pelletizing and deadweight.
For solid gravity flow screen; Owing to will satisfy high temperature resistant, wear-resisting, elevated temperature strength and life requirements, the material requirements of therefore selecting for use is quite high, but the service life of present solid gravity flow screen is still about 1 year; Because material is a solid construction; Because of reasons such as elevated temperature strengths, side sway and flexible deformation appear in solid gravity flow screen sieve beam and crossbeam easily, thereby make the fixing instructions for use of not satisfying; Want whole the taking-up when solid gravity flow screen is changed, change then, solid gravity flow screen sieve beam is more than 400KG, and crossbeam is heavier, because the installation site spatial relationship, it is unfavorable to lift, and it is longer to change the engineering time, is unfavorable for continuous production, and very inconvenience seems.
In order to overcome the above-mentioned shortcoming of solid gravity flow screen, the water flowing gravity flow screen is designed utilization, and 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 processed, 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, requires firm welding, and is water-tight; Repeatedly violent variations in temperature between central cooler high temperature and the normal temperature makes the weld seam easy of crack, leakage accident occurs; Water at high temperature gasifies, and leakage accident will be in case generation will produce serious consequence; Necessary stop production to overhaul, it is inevitable very long to overhaul construction period this moment, is unfavorable for producing; Because water flowing is lowered the temperature, hot water can not recycle in production system, must great amount of heat be derived production system, has increased energy consumption simultaneously.
The utility model content
In order to overcome the technical deficiency of existing water flowing central cooler gravity flow screen, the utility model provides a kind of making to produce the ventilation gravity flow screen device smooth and easy, that energy consumption is low.
The utility model solves the technical scheme that its technical problem adopted:
The central cooler ventilation gravity flow screen device of the utility model comprises bearing, sieve beam, crossbeam, the sieve cap that is positioned at the kiln hood cover, also outside the kiln hood cover, is provided with ventilation duct, blower fan and valve.
The kiln hood cover is fixed on the central cooler steel platform, and bearing is fixed in the kiln hood cover, and crossbeam is shelved on the bearing naturally, two pass-out kiln hood cover, and an end air intake, this end is provided with 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 the crossbeam, and an end is shelved on the bearing, on sieve beam and the crossbeam sieve cap is housed all, and sieve beam air intake pipe end is provided with valve, connects ventilation duct, and by the blower fan air feed, the air outlet of sieve beam is in the kiln hood cover, and hot blast is directly participated in fuel combustion as a wind.
At least two sieve caps further are housed on sieve beam and the crossbeam in the kiln hood cover;
The granular refractory material of filling around the backplate protection bearing can also be set.
The sieve beam of ventilation gravity flow screen and the crossbeam repeatedly violent variations in temperature between high temperature and normal temperature also possibly cause weld cracking, owing to be to ventilate, cracking does not influence ordinary production, and hot blast gets into production again, does not increase energy consumption.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
The specific embodiment
Do further explanation in conjunction with 1 pair of the utility model of accompanying drawing:
Central cooler ventilation gravity flow screen device is the sieve beam of gravity flow screen and crossbeam to be carried out aeration-cooling, increases the temperature strength of gravity flow screen, through design the hot blast of heat exchange is imported production system again simultaneously, reduces energy consumption.
The central cooler ventilation gravity flow screen device of the utility model mainly is made up 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 the central cooler steel platform, and crossbeam is shelved on the bearing naturally, two pass-out kiln hood cover, and an end air intake, this end is provided with 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 the crossbeam, and an end is shelved on the bearing, by design configurations; At least two sieve caps are housed on sieve beam and the crossbeam; Sieve beam blast pipe is provided with 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 is directly participated in fuel combustion as a wind.
Fill granular refractory material around the bearing, with the backplate protection, also make things convenient for repair and maintenance then.
Claims (3)
1. a central cooler ventilation gravity flow screen device comprises the bearing, sieve beam, crossbeam, the sieve cap that are positioned at the kiln hood cover, it is characterized in that: outside the kiln hood cover, also be provided with ventilation duct (2), blower fan (1) and valve (3); Crossbeam is shelved on the bearing naturally, two pass-out kiln hood cover, an end air intake; This end is provided with valve (3), connects 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 is provided with valve (3), connects ventilation duct (2), and by blower fan (1) air feed, the air outlet of sieve beam is in the kiln hood cover, and hot blast is directly participated in fuel combustion as a wind.
2. according to the described central cooler ventilation of claim 1 gravity flow screen device, it is characterized in that: each sieve beam and crossbeam are provided with at least two sieve caps in the kiln hood cover.
3. according to claim 1 or 2 described central cooler ventilation gravity flow screen devices, 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 |
|---|---|---|---|
| CN2012200208491U CN202420213U (en) | 2012-01-17 | 2012-01-17 | Air draft fixed screen device for circular cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200208491U CN202420213U (en) | 2012-01-17 | 2012-01-17 | Air draft fixed screen device for circular cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202420213U true CN202420213U (en) | 2012-09-05 |
Family
ID=46744970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200208491U Withdrawn - After Issue CN202420213U (en) | 2012-01-17 | 2012-01-17 | Air draft fixed screen device for circular cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202420213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538486A (en) * | 2012-01-17 | 2012-07-04 | 常熟市华能环保工程有限公司 | Ventilation fixed screen device of circular cooler |
-
2012
- 2012-01-17 CN CN2012200208491U patent/CN202420213U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538486A (en) * | 2012-01-17 | 2012-07-04 | 常熟市华能环保工程有限公司 | Ventilation fixed screen device of circular cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120905 Effective date of abandoning: 20131106 |
|
| RGAV | Abandon patent right to avoid regrant |