CN207331009U - A kind of quick lime feed opening dust-extraction unit - Google Patents
A kind of quick lime feed opening dust-extraction unit Download PDFInfo
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- CN207331009U CN207331009U CN201720985028.4U CN201720985028U CN207331009U CN 207331009 U CN207331009 U CN 207331009U CN 201720985028 U CN201720985028 U CN 201720985028U CN 207331009 U CN207331009 U CN 207331009U
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- dust
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- quick lime
- excluding hood
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Abstract
The utility model discloses a kind of quick lime feed opening dust-extraction unit and its application method, including ring cold machine, hot wind collecting hood, hot blast main pipe, hot blast manifold, dust excluding hood, quicklime slaking system, cleaning shaft, thermocouple, bag filter and valve, dust excluding hood upper pipe is connected by cleaning shaft with bag filter, one end of hot blast main pipe is connected with the hot wind collecting hood on ring cold machine, and the other end is connected by hot blast manifold with the lower part of dust excluding hood.The utility model is by introducing in the hot wind on ring cold machine to dust excluding hood, change the composition and temperature of dust-laden mixed gas in dust excluding hood, and dust-laden mixed gas temperature is kept more than 106 DEG C, avoiding in steam has water droplet to separate out reacts with quick lime, so as to effectively prevent the quick lime dust of quick lime blanking process generation dust stratification ring formation, blocking in cleaning shaft, manpower cleaning dredging work is significantly reduced, reduces the labor intensity of employee.
Description
Technical field
Quick lime is with addition of dedusting technology, more particularly to a kind of raw stone during the utility model is related to a kind of Sintering Blend
Grey feed opening dust-extraction unit.
Background technology
Sintering Blend process generally uses quicklime slaking system, i.e., quicklime slaking process is with addition of a certain proportion of
Water, material temperature is improved for improving the activity of quick lime and meeting water hair thermal property using quick lime.It can only keep away in the process
The meeting exempted from produces quick lime dust, for this reason, being provided with dust excluding hood in quick lime feed opening, bag-type dust is connected by cleaning shaft
Device.Since quick lime dust meets the characteristic and strong cohesive property of water condensation, the quick lime dust after process and dust excluding hood, dedusting are digested
Inner-walls of duct is collided, bonded, and condenses into cementing circle, more long-pending bigger, reduces dedusting tubing internal diameter, or even cause pipeline to block up
Fill in the generation of phenomenon.In order to avoid dedusting pipeline blockage, it will usually increase substantial amounts of manpower cleaning dredging work, the person of adding
The labor intensity of work.How effectively to avoid quick lime blanking process produce quick lime dust in cleaning shaft dust stratification ring formation,
It is insurmountable problem always in industry.
The content of the invention
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of quick lime feed opening dedusting dress
Put, avoid the quick lime dust after digestion process from depositing ring formation in cleaning shaft, thoroughly solve dedusting pipeline blockage problem.
Technical solution adopted in the utility model is：A kind of quick lime feed opening dust-extraction unit, including ring cold machine, hot wind
Collecting hood, hot blast main pipe, hot blast manifold, dust excluding hood, quicklime slaking system, cleaning shaft, thermocouple, bag filter and valve
Door, dust excluding hood upper pipe are connected by cleaning shaft with bag filter, it is characterised in that set hot blast main pipe, its one end
Connected with the hot wind collecting hood on ring cold machine, the other end is connected by hot blast manifold with the lower part of dust excluding hood.
Thermocouple is provided with the hot blast main pipe, dust excluding hood and cleaning shaft；
Hot blast control valve is provided with the hot blast main pipe；
Hot wind regulating valve is provided with the hot blast manifold；
The cleaning shaft, hot blast main pipe periphery are wrapped up or coated with thermal insulation material.
A kind of application method of quick lime feed opening dust-extraction unit, step are as follows：
(1), the hot blast control valve on hot blast main pipe and the dedusting control valve on cleaning shaft are opened, then opens heat again
Hot wind regulating valve on wind branch pipe；
(2), the exhaust fan on bag filter is opened, ring cold machine air blast is cooled down to the hot wind introducing collected after sinter and is removed
Dust hood, hot blast temperature are 160 DEG C~500 DEG C；
(3), quicklime slaking system is opened, on-line monitoring enters hot wind and cold air, steam and raw stone in dust excluding hood
Grey dust heat exchange situation, adjusts the hot blast control valve on hot blast main pipe and the hot wind control valve opening on hot blast manifold, it is ensured that
The dust-laden mixed gas temperature of formation is more than 106 DEG C；
(4), dust-laden mixed gas enters bag filter dedusting through cleaning shaft.
The utility model has made intensive studies cleaning shaft dust stratification ring formation mechanism, in technology arrangement, whole dedusting
System uses air aspiration process, and before dust-extraction unit is not transformed, a large amount of cold airs disappear from the feed inlet and quick lime of dust excluding hood
The feed opening for changing device enters dust excluding hood, although quicklime slaking process produces a small amount of 150 DEG C~200 DEG C of the vaporific steam of high temperature,
But after entering dust excluding hood, mixed rapidly with the cold air in dust excluding hood, quick lime dust, heat exchange, makes mixed dust-laden
Gas temperature is down to less than 100 DEG C, and actually detected result only has 55 DEG C~60 DEG C, and known steam is condensed into water below 100 DEG C.
55 DEG C~60 DEG C of dust-laden mixed gas is collided with dust excluding hood, cleaning shaft inner wall during pump drainage, bonded, and is sent out
Biochemical reaction：
CaO+H2O=Ca (OH)2↓
As a result, in the lime white that the quick lime in dust is formed after curing, lime particle forms calcium hydroxide colloform texture,
It is attached to dust excluding hood, on cleaning shaft inner wall, condenses into cementing circle, it is more long-pending bigger.
According to cleaning shaft dust stratification ring formation mechanism study as a result, the general thought of technical solutions of the utility model is that ring is cold
Hot wind on machine is introduced in dust excluding hood, by being mixed with the dust-laden of cold air, steam and the rapid heat exchange of quick lime dust, formation
For gas more than 106 DEG C, pump drainage process does not have condensed water, fully enters bag filter.
Compared with prior art, beneficial effect is the utility model：By setting hot blast main pipe, by the hot wind on ring cold machine
Introduce in dust excluding hood, change the composition and temperature of dust-laden mixed gas in dust excluding hood, avoiding in steam has water droplet to separate out and life
Lime reacts, thus effectively prevent quick lime blanking process generation quick lime dust in cleaning shaft dust stratification knot
Circle, block, and significantly reduces manpower cleaning dredging work, reduces the labor intensity of employee.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
In figure：1st, ring cold machine；2nd, hot wind collecting hood；3rd, hot blast main pipe；4th, hot blast manifold；5th, hot wind regulating valve；6th, dedusting
Cover；7th, cleaning shaft；8th, bag filter；9th, quick lime feed bin；10th, belted electronic balance；11st, burnt lime digester；12nd, it is electric
Machine；13rd, material conveyer belt；14th, hot blast control valve；15th, dedusting control valve；16th, thermocouple.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.Referring to Fig. 1, a kind of quick lime feed opening
Dust-extraction unit, including ring cold machine 1, hot wind collecting hood 2, hot blast main pipe 3, hot blast manifold 4, dust excluding hood 6, quicklime slaking system,
Cleaning shaft 7, thermocouple 16, bag filter 8 and valve, 6 upper pipe of dust excluding hood pass through cleaning shaft 7 and bag filter
8 connections, it is characterised in that hot blast main pipe 3 is set, and its one end is connected with the hot wind collecting hood 2 on ring cold machine 1, and the other end passes through
Hot blast manifold 4 is connected with the lower part of dust excluding hood 6.Thermocouple is provided with the hot blast main pipe 3, dust excluding hood 6 and cleaning shaft 7
16；Hot blast control valve 14 is provided with the hot blast main pipe 3；Hot wind regulating valve 5 is provided with the hot blast manifold 4；It is described to remove
Dirt pipeline 7, the periphery of hot blast main pipe 3 are wrapped up or coated with thermal insulation material.
A kind of application method of quick lime feed opening dust-extraction unit, step are as follows：
(1), the hot blast control valve 14 on hot blast main pipe 3 and the dedusting control valve 15 on cleaning shaft 7 are opened, Ran Houzai
Open the hot wind regulating valve 5 on hot blast manifold 4；
(2), the exhaust fan on bag filter 8 is opened, 1 air blast of ring cold machine is cooled down to the hot wind collected after sinter and is introduced
Dust excluding hood 6, hot blast temperature are 160 DEG C~500 DEG C；
(3), quicklime slaking system is opened, on-line monitoring enters hot wind and cold air, steam and raw stone in dust excluding hood 6
Grey dust heat exchange situation, adjusts the hot blast control valve 14 on hot blast main pipe 3 and 5 aperture of hot wind regulating valve on hot blast manifold 4,
Ensure the dust-laden mixed gas temperature to be formed more than 106 DEG C；
(4), dust-laden mixed gas enters 8 dedusting of bag filter through cleaning shaft 7.
Sinter is directly entered 1 entrance of sinter ring cold machine after single roller crushes, and sinter temperature has 450 DEG C~800 DEG C,
Need sinter ring cold machine 1 to be cooled further to less than 150 DEG C, Belt Conveying to blast furnace hopper could be used.Sinter ring cold machine 1
Generally 45~80 trolleys and 12~26 bellows, bellows are set to be each provided on 1 air passage of ring cold machine according to Sintering Yield scale.
Trolley orbits, the sinter in bellows air blast cooling trolley.With China's energy-saving and emission-reduction, efforts at environmental protection it is further
Promote, some sintering plants increase flue gas waste heat power generation device in succession on ring cold machine 1, for this reason, being set on the top of 1 track of ring cold machine
Put hot wind collecting hood 2 and collect hot wind, flue gas heat is utilized effectively.The hot blast temperature of collection is as track is away from ring cold machine
1 entrance and reduce, generally 160 DEG C~500 DEG C.
Embodiment：As shown in Figure 1, the exhaust fan (not shown) flow on bag filter 8：90000m3/ h, total head：
4800Pa, rotating speed：1450r/min, shaft power：135KW.One end of hot blast main pipe 3 and the hot wind collecting hood 2 on ring cold machine 1 are logical
Welding manner connection is crossed, the other end is connected by welding hot blast manifold 4 with the lower part of dust excluding hood 6, makes the heat on ring cold machine 1
Wind enters in dust excluding hood 6.Hot blast control valve 14 is installed on the hot blast main pipe 3 close to hot wind collecting hood 2, is controlled by hot wind
Valve 14 controls hot air flow, the flow velocity in hot blast main pipe 3.Hot wind regulating valve 6 is installed on each hot blast manifold 4, adjusts heat
Air quantity of the wind into dust excluding hood 6.Hot blast temperature is selected according to seasonal variations, and winter environment temperature is low, is electricity from 6 feed inlet of dust excluding hood
The air temperature that sub- 10 feeding port of belt conveyer scale is pumped into is also low, selects the high-temperature hot-air in 350 DEG C~500 DEG C sections at this time, to protect
Finally formed dust-laden mixed gas temperature is more than 106 DEG C in card dust excluding hood 6.Summer environment temperature is high, is fed from dust excluding hood 6
The air temperature that mouth is pumped into is also high, the hot wind in 160 DEG C~260 DEG C sections is selected at this time, it is ensured that most end form in dust excluding hood 6
Into dust-laden mixed gas temperature more than 106 DEG C, and dust-laden mixed gas remains to the temperature of terminal more than 101 DEG C.
6 upper pipe of dust excluding hood is welded with cleaning shaft 7, then is connected with bag filter 8, make the dust-laden mixed gas of extraction smoothly into
Enter bag filter 8.Dedusting control valve 15 is installed on the cleaning shaft 7 close to bag filter 8, controls whole exhausting system
Flow, the flow velocity of system wind.Fig. 1 shows, in hot blast main pipe 3 at hot wind collecting hood 2 and the top of dust excluding hood 6 and cleaning shaft
7 are separately installed with thermocouple 16 at bag filter 8, the mixed gas temperature in on-line monitoring dust excluding hood 6, easy to whole
Exhausting system adjusts wind-warm syndrome, ensures that finally formed dust-laden mixed gas temperature is more than 106 DEG C in dust excluding hood 6.In order to avoid
Whole exhausting system wind-warm syndrome is greatly lowered, in cleaning shaft 7, the periphery parcel thermal insulation material of hot blast main pipe 3, as asbestos,
Alumina silicate fiber felt, or thermal insulation coatings are coated in the periphery of cleaning shaft 7, hot blast main pipe 3, such as alumina silicate thermal insulation coatings or nanometer
Ceramic coating.
In Fig. 1, quicklime slaking system includes quick lime feed bin 9, belted electronic balance 10 and burnt lime digester 11.Thing
The operation of material is so：The quick lime fine powder that quick lime feed bin 9 gets off identifies after the metering of belted electronic balance 10 from stretching into figure
A, 10 one end of belted electronic balance of the dust excluding hood 6 of B is fallen, and is fallen into burnt lime digester 11, at this time, in belted electronic balance 10
Feed opening produce quick lime dust, covered by dust excluding hood 6, mix with hot wind, meanwhile, exhausting system run, also by cold air from
The feed inlet of dust excluding hood 6 is pumped into dust excluding hood 6, is mixed with hot wind.Burnt lime digester 11 is really the auger of a translator 12
Mechanism.Add water into the quick lime fine powder in burnt lime digester 11, digested when twisting, from the feed opening of burnt lime digester 11
Fall, be layered on the iron charge on material conveyer belt 13, material falls in the great wheel of material conveyer belt 13 and (C dust excluding hoods 6 identified in figure
Position), then sintering machine is transported to by another material conveyer belt 13.Meanwhile exhausting system is also by under burnt lime digester 11
In the dust excluding hood 6 that A, B are identified in the vaporific steam suction figure of high temperature that a small amount of cold air and quicklime slaking that material mouth is pumped into produce,
Mixed with hot wind.In addition, cold air and quick lime are also continued the high temperature of digestion generation by exhausting system on material conveyer belt 13
Vaporific steam is pumped into the dust excluding hood 6 that C is identified in figure, is mixed with hot wind.
When the utility model is used, operating procedure is as follows：
(1), the hot blast control valve 14 on hot blast main pipe 3 and the dedusting control valve 15 on cleaning shaft 7 are opened, Ran Houzai
Open the hot wind regulating valve 5 on hot blast manifold 4；
(2), the exhaust fan on bag filter 8 is opened, 1 air blast of ring cold machine is cooled down to the hot wind (Fig. 1 collected after sinter
Flow direction shown in cathetus arrow) dust excluding hood 6 and whole exhausting system are introduced, winter selects the high warm in 350 DEG C~500 DEG C sections
Wind, summer select the hot wind in 160 DEG C~260 DEG C sections, and the temperature in other seasons selects in the range of 160 DEG C~500 DEG C；
(3), quicklime slaking system is opened, passes through mixed gas temperature in 16 on-line monitoring dust excluding hood 6 of thermocouple, moment
After monitoring enters the hot wind in dust excluding hood 6 and cold air, steam and quick lime dust heat exchange, the dust-laden gaseous mixture body temperature of formation
Degree is more than 106 DEG C, if dust-laden mixed gas temperature is less than 106 DEG C, adjusts the hot blast control valve 14 on hot blast main pipe 3 in time
And 5 aperture of hot wind regulating valve on hot blast manifold 4, increase hot air flow, or both combination selection higher temperature hot wind, improve
Dust-laden mixed gas temperature is to more than 106 DEG C；
(4), dust-laden mixed gas further mixes in cleaning shaft 7, eventually enters into 8 dedusting of bag filter (in Fig. 1
Flow direction shown in setback arrow).
The utility model implements monitoring result and is shown in Table 1：
1 the utility model of table implements monitoring result
| Monitoring time | 2 outlet temperature of hot wind collecting hood | Dust excluding hood 6A | Dust excluding hood 6B | Dust excluding hood 6C | 8 inlet temperature of bag filter |
| 2016.10.15 | 320℃ | 125℃ | 126℃ | 117℃ | 114℃ |
| 2016.12.26 | 450℃ | 135℃ | 133℃ | 128℃ | 131℃ |
| 2017.1.10 | 480℃ | 138℃ | 136℃ | 132℃ | 134℃ |
| 2017.4.12 | 280℃ | 121℃ | 123℃ | 119℃ | 120℃ |
| 2017.6.17 | 260℃ | 116℃ | 118℃ | 115℃ | 110℃ |
| 2017.7.26 | 160℃ | 109℃ | 108℃ | 106℃ | 103℃ |
The implementation of the utility model obtains extraordinary effect, after production run half a year, when maintenance open cleaning shaft 7 and
Manhole observation on dust excluding hood 6, no quick lime dust deposit ring formation phenomenon in 7 inner wall of cleaning shaft and 6 inner wall of dust excluding hood, thoroughly
Solves dedusting pipeline blockage problem.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and modification can also be made, these change
The scope of protection of the utility model is also should be regarded as into modification.
Claims (5)
1. a kind of quick lime feed opening dust-extraction unit, including ring cold machine, hot wind collecting hood, hot blast main pipe, hot blast manifold, dedusting
Cover, quicklime slaking system, cleaning shaft, thermocouple, bag filter and valve, dust excluding hood upper pipe pass through cleaning shaft
Connected with bag filter, it is characterised in that hot blast main pipe is set, and its one end is connected with the hot wind collecting hood on ring cold machine, separately
One end is connected by hot blast manifold with the lower part of dust excluding hood.
2. a kind of quick lime feed opening dust-extraction unit according to claim 1, it is characterised in that the hot blast main pipe, remove
Thermocouple is provided with dust hood and cleaning shaft.
3. a kind of quick lime feed opening dust-extraction unit according to claim 1, it is characterised in that set on the hot blast main pipe
It is equipped with hot blast control valve.
4. a kind of quick lime feed opening dust-extraction unit according to claim 1, it is characterised in that set on the hot blast manifold
It is equipped with hot wind regulating valve.
5. a kind of quick lime feed opening dust-extraction unit according to claim 1, it is characterised in that the cleaning shaft, heat
Wind supervisor wraps up or coated with thermal insulation material periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720985028.4U CN207331009U (en) | 2017-08-08 | 2017-08-08 | A kind of quick lime feed opening dust-extraction unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720985028.4U CN207331009U (en) | 2017-08-08 | 2017-08-08 | A kind of quick lime feed opening dust-extraction unit |
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| CN207331009U true CN207331009U (en) | 2018-05-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385202A (en) * | 2017-08-08 | 2017-11-24 | 新余钢铁股份有限公司 | A kind of quick lime feed opening dust arrester and its application method |
| CN110564955A (en) * | 2019-09-10 | 2019-12-13 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
| CN110564954A (en) * | 2019-09-10 | 2019-12-13 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
-
2017
- 2017-08-08 CN CN201720985028.4U patent/CN207331009U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385202A (en) * | 2017-08-08 | 2017-11-24 | 新余钢铁股份有限公司 | A kind of quick lime feed opening dust arrester and its application method |
| CN110564955A (en) * | 2019-09-10 | 2019-12-13 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
| CN110564954A (en) * | 2019-09-10 | 2019-12-13 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
| CN110564955B (en) * | 2019-09-10 | 2021-08-31 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
| CN110564954B (en) * | 2019-09-10 | 2021-08-31 | 中冶长天国际工程有限责任公司 | Iron smelting device and sintering equipment thereof |
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