CN107385202A - A kind of quick lime feed opening dust arrester and its application method - Google Patents
A kind of quick lime feed opening dust arrester and its application method Download PDFInfo
- Publication number
- CN107385202A CN107385202A CN201710672799.2A CN201710672799A CN107385202A CN 107385202 A CN107385202 A CN 107385202A CN 201710672799 A CN201710672799 A CN 201710672799A CN 107385202 A CN107385202 A CN 107385202A
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- hot blast
- dust
- quick lime
- excluding hood
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- Geochemistry & Mineralogy (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of quick lime feed opening dust arrester and its application method, including central cooler, hot blast collecting hood, hot blast main pipe, hot blast manifold, dust excluding hood, quicklime slaking system, cleaning shaft, thermocouple, sack cleaner and valve, dust excluding hood upper pipe is connected by cleaning shaft with sack cleaner, one end of hot blast main pipe is connected with the hot blast collecting hood on central cooler, and the other end is connected by hot blast manifold with the bottom of dust excluding hood.The present invention is by introducing in the hot blast on central cooler 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 quick lime dust caused by quick lime blanking process dust stratification ring formation, blocking in cleaning shaft, manpower cleaning dredging work is significantly reduced, reduces the labor intensity of employee.
Description
Technical field
The present invention relates to quick lime during a kind of Sintering Blend with addition of dedusting technology, under more particularly to a kind of quick lime
Material mouth dust arrester and its application method.
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, therefore, being provided with dust excluding hood in quick lime feed opening, bag-type dust is connected by cleaning shaft
Device.Because 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 quick lime blanking process caused by quick lime dust cleaning shaft in dust stratification ring formation is effectively avoided,
It is insurmountable problem always in industry.
The content of the invention
For above-mentioned technical problem, it is an object of the invention to provide a kind of quick lime feed opening dust arrester and its
Application method, avoid the quick lime dust after digestion process from depositing ring formation in cleaning shaft, thoroughly solve dedusting pipeline blockage
Problem.
The technical solution used in the present invention is：A kind of quick lime feed opening dust arrester, including central cooler, hot blast are collected
Cover, hot blast main pipe, hot blast manifold, dust excluding hood, quicklime slaking system, cleaning shaft, thermocouple, sack cleaner and valve,
Dust excluding hood upper pipe is connected by cleaning shaft with sack cleaner, it is characterised in that sets hot blast main pipe, its one end and ring
Hot blast collecting hood connection in cold, the other end are connected by hot blast manifold with the bottom 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 blast regulating valve is provided with the hot blast manifold；
The cleaning shaft, hot blast main pipe periphery are wrapped up or coated with insulation material.
A kind of application method of quick lime feed opening dust arrester, 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 open heat again
Hot blast regulating valve on wind branch pipe；
(2) air exhauster on sack cleaner, is opened, central cooler air blast is cooled down to the hot blast introducing collected after sintering deposit and removed
Dust hood, hot blast temperature are 160 DEG C~500 DEG C；
(3) quicklime slaking system, the hot blast that on-line monitoring enters in dust excluding hood and cold air, steam and raw stone, are opened
Grey dust heat exchange situation, adjust the hot blast control valve on hot blast main pipe and the hot blast 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 removing dust pipeline enters sack cleaner dedusting.
The present invention has made intensive studies to cleaning shaft dust stratification ring formation mechanism, in technology arrangement, whole dust pelletizing system
Using air aspiration process, before dust arrester is not transformed, charging aperture and burnt lime digester of a large amount of cold airs from dust excluding hood
Feed opening enter 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,
Into after dust excluding hood, mixed rapidly with the cold air in dust excluding hood, quick lime dust, heat exchange, make mixed dusty 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℃
~60 DEG C of dust-laden mixed gas is collided with dust excluding hood, cleaning shaft inwall during pump drainage, bonded, and is changed
Learn reaction：
CaO+H2O=Ca (OH)2↓
As a result, in the lime white formed after the quick lime curing in dust, lime particle forms calcium hydroxide colloform texture,
It is attached to dust excluding hood, on cleaning shaft inwall, condenses into cementing circle, it is more long-pending bigger.
According to cleaning shaft dust stratification ring formation study mechanism result, the general thought of technical solution of the present invention is by central cooler
Hot blast introduce dust excluding hood in, by with cold air, steam and the rapid heat exchange of quick lime dust, the dust-laden mixed gas of formation
More than 106 DEG C, pump drainage process does not have condensed water, fully enters sack cleaner.
Compared with prior art, beneficial effect is the present invention：By setting hot blast main pipe, the hot blast on central cooler is introduced
In dust excluding hood, change the composition and temperature of dust-laden mixed gas in dust excluding hood, avoiding in steam has water droplet precipitation and quick lime
React, so as to effectively prevent the dust stratification ring formation, stifled in cleaning shaft of quick lime dust caused by quick lime blanking process
Plug, manpower cleaning dredging work is significantly reduced, reduce the labor intensity of employee.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, central cooler；2nd, hot blast collecting hood；3rd, hot blast main pipe；4th, hot blast manifold；5th, hot blast regulating valve；6th, dedusting
Cover；7th, cleaning shaft；8th, sack cleaner；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 invention will be further described with reference to the accompanying drawings and examples.Referring to Fig. 1, a kind of quick lime feed opening dedusting
Device, including central cooler 1, hot blast collecting hood 2, hot blast main pipe 3, hot blast manifold 4, dust excluding hood 6, quicklime slaking system, dedusting
Pipeline 7, thermocouple 16, sack cleaner 8 and valve, the upper pipe of dust excluding hood 6 are connected by cleaning shaft 7 and sack cleaner 8
It is logical, it is characterised in that hot blast main pipe 3 is set, and its one end connects with the hot blast collecting hood 2 on central cooler 1, and the other end passes through hot blast
Branch pipe 4 connects with the bottom of dust excluding hood 6.Thermocouple 16 is provided with the hot blast main pipe 3, dust excluding hood 6 and cleaning shaft 7；Institute
State and hot blast control valve 14 is provided with hot blast main pipe 3；Hot blast regulating valve 5 is provided with the hot blast manifold 4；The cleaning shaft
7th, the periphery of hot blast main pipe 3 is wrapped up or coated with insulation material.
A kind of application method of quick lime feed opening dust arrester, 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 blast regulating valve 5 on hot blast manifold 4；
(2) air exhauster on sack cleaner 8, is opened, the air blast of central cooler 1 is cooled down to the hot blast collected after sintering deposit and introduced
Dust excluding hood 6, hot blast temperature are 160 DEG C~500 DEG C；
(3) quicklime slaking system, the hot blast that on-line monitoring enters in dust excluding hood 6 and cold air, steam and raw stone, are opened
Grey dust heat exchange situation, the hot blast control valve 14 on hot blast main pipe 3 and the aperture of hot blast regulating valve 5 on hot blast manifold 4 are adjusted,
Ensure the dust-laden mixed gas temperature to be formed more than 106 DEG C；
(4), dust-laden mixed gas removing dust pipeline 7 enters the dedusting of sack cleaner 8.
Sintering deposit is directly entered the entrance of sintering deposit central cooler 1 after single roller is broken, and sintering deposit temperature has 450 DEG C~800 DEG C,
Need sintering deposit central cooler 1 to be cooled further to less than 150 DEG C, Belt Conveying to blast furnace hopper could be used.Sintering deposit central cooler 1
Typically 45~80 chassis and 12~26 bellows, bellows are set to be each provided on the air channel of central cooler 1 according to Sintering Yield scale.
Chassis orbits, the sintering deposit in bellows air blast cooling chassis.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 central cooler 1, therefore, being set on the top of the track of central cooler 1
Put hot blast collecting hood 2 and collect hot blast, flue gas heat is utilized effectively.The hot blast temperature of collection is as track is away from central cooler
1 entrance and reduce, generally 160 DEG C~500 DEG C.
Embodiment：As shown in figure 1, the air exhauster (not shown) flow on sack cleaner 8：90000m3/ h, total head：
4800Pa, rotating speed：1450r/min, shaft power：135KW.One end of hot blast main pipe 3 and the hot blast collecting hood 2 on central cooler 1 are logical
Welding manner connection is crossed, the other end connects by welding hot blast manifold 4 with the bottom of dust excluding hood 6, makes the heat on central cooler 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 blast collecting hood 2, controlled by hot blast
Valve 14 controls hot air flow, the flow velocity in hot blast main pipe 3.Hot blast regulating valve 6, regulation heat are installed on each hot blast manifold 4
Wind enters the air quantity of dust excluding hood 6.Hot blast temperature selects according to seasonal variations, and winter environment temperature is low, is electricity from the charging aperture of dust excluding hood 6
The air temperature that the sub- feeding port of belt conveyer scale 10 is pumped into is also low, now selects the high-temperature hot-air in 350 DEG C~500 DEG C sections, to protect
The dust-laden mixed gas temperature ultimately formed in card dust excluding hood 6 is more than 106 DEG C.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 blast in 160 DEG C~260 DEG C sections is now selected, 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.
The upper pipe of dust excluding hood 6 is welded with cleaning shaft 7, then is connected with sack cleaner 8, the dust-laden mixed gas of extraction is smoothly entered
Enter sack cleaner 8.Dedusting control valve 15 is installed on the cleaning shaft 7 close to sack cleaner 8, controls whole exhausting system
Flow, the flow velocity of system wind.Fig. 1 shows, in hot blast main pipe 3 at hot blast collecting hood 2 and the top of dust excluding hood 6 and cleaning shaft
7 are separately installed with thermocouple 16 at sack cleaner 8, the mixed gas temperature in on-line monitoring dust excluding hood 6, are easy to whole
Exhausting system adjusts wind-warm syndrome, and the dust-laden mixed gas temperature for ensureing to ultimately form in dust excluding hood 6 is more than 106 DEG C.In order to avoid
Whole exhausting system wind-warm syndrome is greatly lowered, in cleaning shaft 7, the periphery parcel 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, one end of belted electronic balance 10 of B dust excluding hood 6 is fallen, and is fallen into burnt lime digester 11, now, in belted electronic balance 10
Feed opening produce quick lime dust, covered by dust excluding hood 6, mix with hot blast, meanwhile, exhausting system run, also by cold air from
The charging aperture of dust excluding hood 6 is pumped into dust excluding hood 6, is mixed with hot blast.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 caused by a small amount of cold air and quicklime slaking that material mouth is pumped into,
Mixed with hot blast.In addition, exhausting system also continues cold air and quick lime to digest caused high temperature 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 blast.
The present invention is in use, 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 blast regulating valve 5 on hot blast manifold 4；
(2) air exhauster on sack cleaner 8, is opened, the air blast of central cooler 1 is cooled down to the hot blast (Fig. 1 collected after sintering deposit
Flowed to 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 blast 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 the on-line monitoring dust excluding hood 6 of thermocouple 16, moment
After monitoring enters the hot blast 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 the aperture of hot blast regulating valve 5 on hot blast manifold 4, increase hot air flow, or both combination selection higher temperature hot blast, 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 the dedusting of sack cleaner 8 (in Fig. 1
Flowed to shown in setback arrow).
The present invention implements monitoring result and is shown in Table 1：
The present invention of table 1 implements monitoring result
| Monitor the time | The outlet temperature of hot blast collecting hood 2 | Dust excluding hood 6A | Dust excluding hood 6B | Dust excluding hood 6C | The inlet temperature of sack cleaner 8 |
| 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 present invention obtains extraordinary effect, and cleaning shaft 7 and dedusting are opened after production run half a year, during maintenance
Manhole observation on cover 6, no quick lime dust is in the inwall of cleaning shaft 7 and the inwall of dust excluding hood 6 deposition ring formation phenomenon, thoroughly solution
Dedusting pipeline blockage problem.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and modification can also be made, these improvement and modification
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of quick lime feed opening dust arrester, including central cooler, hot blast collecting hood, hot blast main pipe, hot blast manifold, dedusting
Cover, quicklime slaking system, cleaning shaft, thermocouple, sack cleaner and valve, dust excluding hood upper pipe pass through cleaning shaft
Connected with sack cleaner, it is characterised in that hot blast main pipe is set, and its one end connects with the hot blast collecting hood on central cooler, separately
One end is connected by hot blast manifold with the bottom of dust excluding hood.
2. a kind of quick lime feed opening dust arrester 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 arrester 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 arrester according to claim 1, it is characterised in that set on the hot blast manifold
It is equipped with hot blast regulating valve.
5. a kind of quick lime feed opening dust arrester according to claim 1, it is characterised in that the cleaning shaft, heat
Wind supervisor wraps up or coated with insulation material periphery.
6. a kind of application method of quick lime feed opening dust arrester, step are as follows：
（1）, the hot blast control valve on hot blast main pipe and the dedusting control valve on cleaning shaft opened, then open hot blast branch again
Hot blast regulating valve on pipe；
（2）, open air exhauster on sack cleaner, will central cooler air blast cool down sintering deposit after the hot blast collected introduce dedusting
Cover, hot blast temperature are 160 DEG C ~ 500 DEG C；
（3）, open quicklime slaking system, hot blast and cold air, steam and the calcium lime powder that on-line monitoring enters in dust excluding hood
Dirt heat exchange situation, adjust the hot blast control valve on hot blast main pipe and the hot blast control valve opening on hot blast manifold, it is ensured that formed
Dust-laden mixed gas temperature more than 106 DEG C；
（4）, dust-laden mixed gas removing dust pipeline enter sack cleaner dedusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710672799.2A CN107385202A (en) | 2017-08-08 | 2017-08-08 | A kind of quick lime feed opening dust arrester and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710672799.2A CN107385202A (en) | 2017-08-08 | 2017-08-08 | A kind of quick lime feed opening dust arrester and its application method |
Publications (1)
| Publication Number | Publication Date |
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| CN107385202A true CN107385202A (en) | 2017-11-24 |
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ID=60354999
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| CN201710672799.2A Pending CN107385202A (en) | 2017-08-08 | 2017-08-08 | A kind of quick lime feed opening dust arrester and its application method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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| 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 |
| 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 |
| 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 |
| 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 |
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Application publication date: 20171124 |