CN108905553A - One kind being used for the ultralow arranging device of steel industry fume treatment - Google Patents
One kind being used for the ultralow arranging device of steel industry fume treatment Download PDFInfo
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- CN108905553A CN108905553A CN201810977503.2A CN201810977503A CN108905553A CN 108905553 A CN108905553 A CN 108905553A CN 201810977503 A CN201810977503 A CN 201810977503A CN 108905553 A CN108905553 A CN 108905553A
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- demister
- ultralow
- flue gas
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- barostat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to one kind to be used for the ultralow arranging device of steel industry fume treatment, from the bottom up successively includes " barostat ", " three-level ridge demister " in desulfurizing tower." barostat " is configured with the spray irrigation system with nozzle, valve, pipeline；The spacing of every grade of demister demisting piece of three-level ridge demister and structure difference.5mg/Nm is smaller than by the exhanst gas outlet dust content after device3, realize minimum discharge requirement.Using " barostat ", internal structure is simple, should not be blocked, and easy cleaning, crushing is low, and investment, operating cost are low.
Description
Technical field
The present invention relates to one kind to be used for the ultralow arranging device of steel industry fume treatment, is applied to a kind of energy in desulfurizing tower
Flue gas ash removal, demisting efficiency are improved, the device of minimum discharge is reached.
Background technique
It several years ago is substantially achieved control for the minimum discharge of power industry fire coal boiler fume, as national environmental protection is wanted
Ask increasingly harsh, agenda is also arranged in steel industry minimum discharge.On May 7th, 2019, general office of ecological environment portion issue about sign
It asks《Iron and steel enterprise's minimum discharge retrofit work scheme（Exposure draft）》The letter of opinion.
The main target of clear retrofit work is in opinion original text：It is " newly-built（Containing resettlement）Steel project will entirely reach ultralow
Emission level.To the year two thousand twenty by the end of October before, the prevention and control of air pollution key area such as Jing-jin-ji region and periphery, the Yangtze River Delta, Fen Weihe Plain
The iron and steel enterprise for having transformation condition is basically completed minimum discharge transformation；To before the end of the year 2022, Pearl River Delta, Chengdu-Chongqing, Liaoning Middle,
The regions such as Wuhan and its periphery, Chang Zhu Tan, Wu Chang are basically completed；To before the end of the year 2025, the whole nation has the steel enterprise of transformation condition
Industry strives realizing minimum discharge." corresponding control standard requirements are：" flue gas of sintering machine head, pellet roasting flue gas are oxygen-containing in benchmark
Under the conditions of amount 16%, the small hourly value concentration of emission of particulate matter, sulfur dioxide, nitrogen oxides be respectively no higher than 10,35,50 milligrams/it is vertical
Square rice；The small hourly value concentration of emission of other pollution sources particulate matters, sulfur dioxide, nitrogen oxides is respectively no higher than 10,50,150 millis
Gram/cubic metre, specific targets limit value are seen attached list.Within assessment cycle, the small hourly value concentration of emission of iron and steel enterprise at least 95% or more
Meet above-mentioned requirements, can regard as reaching minimum discharge level." each timing node completes transformation scale requirements：" strive 2020
Steel production capacity will be completed before the end of the year and is transformed 4.8 hundred million tons, and 5.8 hundred million tons will be completed before the end of the year 2022,900,000,000 tons of left sides of transformation will be completed before the end of the year 2025
It is right."
So stringent environmental requirement, is the major transformation of non-electrical industry smoke gas treatment, determines the final and decisive juncture and economy of enterprise
Benefit, how could effectively, low cost reach minimum discharge will gas be current problem.
The technology for reaching minimum discharge requirement to the disposition of flue gas flue dust, droplet at present is also very much, mainly have " electric precipitation+
Absorption tower dedusting+wet-esp ", " low temperature electric precipitation+high-effective dust-removing absorption tower+wet-esp ", " bag-type dust/electricity
Dedusting+absorption tower dedusting+bundled tube deduster ".
" electric precipitation+absorption tower dedusting+wet-esp ", " low temperature electric precipitation+high-effective dust-removing absorption tower+wet type electricity removes
The dedusting of dirt ", defogging effect are preferable, can meet minimum discharge requirement.But the land occupation of wet cottrell is big, cost of investment,
It is high to run power consumption, flue gas resistance, service technique, maintenance cost, and deposits pole plate in operation and metal parts is perishable and need
The problems such as waste water dis posal, many electric power enterprises encounter many difficulties in specific implementation wet electrical dust precipitator.
And the bundled tube dedusting that emphasis is promoted in " bag-type dust/electric precipitation+absorption tower dedusting+bundled tube deduster " technique
Device is the market behavior of individual enterprises, and the time for releasing application is very short, is examined without prolonged, most important slurries mist
Drip discharge index and without the detection and identification of science.From the Inner construction analysis of bundled tube deduster, bundled tube deduster
There are multiple spiral boards and venturi in inside, and structure is complicated, and the risk of fouling is as good as conventional ridge type demister.Pass through
Application of the failure application attestations of the ten thousand state power plant bundled tube deduster in minimum discharge is also immature, and main cause is eddy flow
Contradiction, defogging effect are poor each other with secondary flue gas liquid carry over for demisting efficiency；" the tubular type machinery cyclone dust " being bundled together, it is right
The flow distribution evenness of desulfurization tower section requires very high；The bad adaptability that bundled tube deduster changes unit load.
It can be seen that at present in the technique of flue gas minimum discharge, denitrification process and equipment more mature stabilization；Desulfurization work
Skill and equipment are mature, reliable, but also need to gradually reduce investment, operating cost, improve whole system efficiency；Dedusting, demisting technique
With equipment also in be verified or need to improve the stage, the side such as the reliability especially run and investment, cost, Maintenance and Repair
Face also needs to add to study and consider.
Summary of the invention
The demands such as stable, reliable, efficient, low cost are needed for current steel industry flue gas ash removal, demisting, the present invention provides
It is a kind of to be used for steel industry fume treatment ultralow arranging device.
The technical scheme is that：Flue gas of sintering machine head, pellet roasting flue gas enter desulfurizing tower after leading portion pre-processes
（Import dust concentration<20mg/Nm3）, with spraying layer（3）The absorbent of spray carries out gas-liquid contact, and flue gas passes through " gas after spray
Press adjuster（2）With three-level ridge demister（1）" qualified discharge after processing.
The slurries of spray have certain dedusting function, the particle that can will be escaped from front end deduster to the washing of flue gas
Object carries out secondary trapping, to reduce smoke dust discharge concentration, achievees the effect that collaboration is administered.Spraying layer（3）It can remove most of
Into the flue gas flue dust of desulfurizing tower, but such as without further dedusting, demisting, then desulfurizing tower exiting flue gas is not able to satisfy still super
The requirement of low emission.
Desulfurizing tower outlet dust concentration be it is dimeric, a part is brought by desulfurizer front end electric precipitation
, the remaining flue dust after absorption tower washing, absorbing, another part is that flue gas flows through the slurries droplet taken out of after demister,
The solid particles such as gypsum, lime stone contained in droplet are counted into dust concentration.So will be wet after spray in this patent
Flue gas passes through " barostat again（2）With three-level ridge demister（1）" further removed the flue dust of escape and droplet, out
The dust content of mouth is smaller than 5mg/Nm3, it can be achieved that being finally reached minimum discharge requirement.
" barostat in the present invention（2）" by multiple there is upper lower pyramid mouth（5,7）And cylindrical channel（6）Similar dumbbell shaped
Minor adjustment device composition, upper lower pyramid mouth（5,7）Horizontal sextant angle R is 30 ~ 60 °, minor adjustment device quantity and barostat（2）It is required
Percent opening and cylindrical channel（6）Interior flue gas flow rate ν is related.Cylindrical channel（6）Length is related with flue gas flow rate ν, and general flue gas exists
Cylindrical channel（6）Residence time is 0 ~ 3s.Flue gas passes through spraying layer（3）After pass through lower pyramid mouth（7）Into cylindrical channel（6）, because
Channel narrows, the gap between gas molecule become smaller, and hydrone is also closer, closely can be mutual to the hydrogen bond between hydrone
Effect, when flue gas passes through cylindrical channel（6）Pass through upper cone mouth（5）Afterwards, air pressure moment reduce, on the one hand other gas molecules due to
Repulsion is spread apart rapidly between molecule, but due to spreading there are hydrogen bond slower than other between hydrone, steam can be rapid
Condensation；The remote potential energy increase of distance between gas molecule when being on the other hand depressured can become potential energy cooling interior, condensation vapor,
The droplet of these condensations falls under the effect of gravity, or is removed in the demister of rear end.Flue gas is passing through cylindrical channel（6）
When, gas velocity increases, and molecular motion is fierce, increases the collision between hydrone, is easily formed compared with big droplet, due to the inertia of gas
Effect of impact, droplet and cylindrical channel（6）The drop that inner surface collides and gathered arrives greatly the gravity of its own generation more than gas
When the climbing power of body and the resultant force of surface tension of liquid, drop is just from cylindrical channel（6）It is separated on inner surface.
As a further improvement of the present invention, the described " barostat（2）" the mating spray irrigation pipeline in top, valve,
Nozzle（4）, facilitate " barostat（2）" inner wall flushing, prevent fouling.Nozzle（4）By reach effectively rinse for the purpose of into
Row arrangement.
As a further improvement of the present invention, the described " barostat（2）" it is sprayed the settable control system of valve,
It is timed flushing or emergency is rinsed.
As a further improvement of the present invention, the described " barostat（2）" material that uses can for alloy material,
Carbon steel brushing anti-corrosion material, glass reinforced plastic, heat-proof corrosion resistant lose high strength plastics.
As a further improvement of the present invention, the described " barostat（2）" inner wall can do hydrophobicity processing, have lotus leaf
Effect prevents encrustation, blocking.
As a further improvement of the present invention, the described " barostat（2）" cone mouth（5,7）Between parallel distance L be 0
~D（D is desulfurizing tower internal diameter）.
Pass through " barostat（2）" after flue gas enter " three-level ridge demister（1）" further removed.
" three-level ridge demister（1）" be made of tubular demister and three-level demister.Tubular demister is mounted on first order demister
Under, play the role of primary demisting and flue gas even distribution；First order demister demisting piece spacing 30mm；The thin grade of second level demister, is removed
Mist piece buckle, spacing 25.4mm；The thin grade of third level demister, demisting piece buckle, spacing 20mm.
As a further improvement of the present invention, increase level-one after the second level demister and humidify enhancing device：Work as flue gas
After level-one, second level demister, the slurries dirt and water carried in flue gas is largely removed, and there remains the slurries dirt of particle very little
And the requirement of gravity centrifuge separation is not achieved in water and demister collision, can be discharged with flue gas；Increase after the demister of the second level and adds
Wet device, humidification atomized water are collided with molecule in flue gas and water mist, and little particle and water mist droplet particle size increase, then go and
The collision separation of third level demister, is discharged clean flue gas.
As a further improvement of the present invention, described " the three-level ridge demister（1）" and " barostat（2）" between
Distance is 2000 ~ 8000mm, and it is uniformly distributed to be conducive to flue gas flow field.
The beneficial effects of the invention are as follows：Pass through " barostat（2）With three-level ridge demister（1）" effect, control
Demister exports drop carrying amount and is not more than 30mg/Nm3, gypsum solid conversion dustiness in drop can be made to control in 2mg/Nm3It is left
The right side makes final outlet dust content be smaller than 5mg/Nm3, realize minimum discharge requirement.Using " barostat（2）", it is internal
Structure is simple, is different from bundled tube deduster, should not be blocked, and easy cleaning, crushing is low, and investment, operating cost are low.
Detailed description of the invention
Fig. 1 is schematic view of the mounting position in inventive desulfurization tower
Fig. 2 is " barostat " top view in the present invention
Fig. 3 is " barostat " A-A sectional view in the present invention
Fig. 4 is the arrangement schematic diagram of " three-level ridge demister " in the present invention
In figure label for：1- three-level ridge demister；2- barostat；3- spraying layer；4- barostat flooding nozzle；5-
Upper cone mouth；6- cylindrical channel；7- lower pyramid mouth.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Desulfurizing tower import 600000m3/ h operating condition flue gas, 170 DEG C of smoke temperature, import dust concentration 18mg/L, desulfurizing tower internal diameter
For 7.5m, barostat percent opening is 41%, and flue gas is 8m/s, cylindrical channel in cylindrical channel gas velocity（6）Length is 4m.Into
Enter desulfurization tower flue gas and passes sequentially through spraying layer from the bottom up（3）, barostat（2）, three-level ridge demister（1）, spraying layer
The slurries of spray are by the SO in flue gas2, the pollutants such as flue dust carry out most of removal, the wet flue gas after spray enters air pressure adjustment
Device（2）, increase gas velocity, air pressure and molecular motion by changing aisle spare, inner wall condensation and upper cone mouth collided by droplet（5）
Low pressure condensation mode removes smoke abatement and droplet.Finally by three-level ridge demister（1）Demisting, drop in demister exiting flue gas
Content is lower than 15 ~ 20mg/Nm3（Butt, standard state）, desulfurizing tower outlet dust content is no more than 5mg/Nm3（Standard state, butt, 6%O2）
Index.
Claims (5)
- It from the bottom up successively include " air pressure adjustment in desulfurizing tower 1. one kind is used for the ultralow arranging device of steel industry fume treatment Device（2）", " three-level ridge demister（1）"；It is characterized in that " the barostat in described device（2）" be configured with band nozzle, The spray irrigation system of valve, pipeline；Three-level ridge demister（1）Every grade of demister demisting piece spacing and structure it is different.
- 2. according to claim 1 a kind of for the ultralow arranging device of steel industry fume treatment, it is characterised in that：" air pressure Adjuster（2）" by multiple there is upper lower pyramid mouth（5,7）And cylindrical channel（6）The minor adjustment device of similar dumbbell shaped forms, upper lower pyramid mouth （5,7）Horizontal sextant angle R is 30 ~ 60 °, cylindrical channel（6）Length is related with flue gas flow rate ν, and general flue gas is in cylindrical channel（6）Stop Staying the time is 0 ~ 3s.
- 3. according to claim 1 a kind of for the ultralow arranging device of steel industry fume treatment, it is characterised in that：" air pressure Adjuster（2）" mating the sprays irrigation pipeline in top and valve, nozzle be arranged for the purpose of reaching effectively flushing.
- 4. according to claim 2 a kind of for the ultralow arranging device of steel industry fume treatment, it is characterised in that：It is described " barostat（2）" cone mouth（5,7）Between parallel distance L be 0 ~ D（D is desulfurizing tower internal diameter）.
- 5. according to claim 1 a kind of for the ultralow arranging device of steel industry fume treatment, it is characterised in that：" three-level Ridge demister（1）" be made of tubular demister and three-level demister；Tubular demister is mounted under first order demister, is risen It is acted on to thick grade demisting and flue gas even distribution；The thick grade of first order demister, demisting piece spacing 30mm；The thin grade of second level demister, is removed Mist piece buckle, spacing 25.4mm；The thin grade of third level demister, demisting piece buckle, spacing 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810977503.2A CN108905553A (en) | 2018-08-27 | 2018-08-27 | One kind being used for the ultralow arranging device of steel industry fume treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810977503.2A CN108905553A (en) | 2018-08-27 | 2018-08-27 | One kind being used for the ultralow arranging device of steel industry fume treatment |
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| CN108905553A true CN108905553A (en) | 2018-11-30 |
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| CN201810977503.2A Pending CN108905553A (en) | 2018-08-27 | 2018-08-27 | One kind being used for the ultralow arranging device of steel industry fume treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111569626A (en) * | 2020-05-22 | 2020-08-25 | 四川君和环保股份有限公司 | Sintering flue gas treatment process and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205730730U (en) * | 2016-05-07 | 2016-11-30 | 同正环保集团有限公司 | A kind of multitube Venturi |
| CN106731422A (en) * | 2017-02-23 | 2017-05-31 | 哈尔滨锅炉厂环保工程技术有限公司 | A kind of desulfurizing tower dust is grown up and merges dedusting demisting integrated apparatus |
-
2018
- 2018-08-27 CN CN201810977503.2A patent/CN108905553A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205730730U (en) * | 2016-05-07 | 2016-11-30 | 同正环保集团有限公司 | A kind of multitube Venturi |
| CN106731422A (en) * | 2017-02-23 | 2017-05-31 | 哈尔滨锅炉厂环保工程技术有限公司 | A kind of desulfurizing tower dust is grown up and merges dedusting demisting integrated apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111569626A (en) * | 2020-05-22 | 2020-08-25 | 四川君和环保股份有限公司 | Sintering flue gas treatment process and system |
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Application publication date: 20181130 |