CN104998510B - Removing device and method for inhalable particles and fine particles in flue gas - Google Patents
Removing device and method for inhalable particles and fine particles in flue gas Download PDFInfo
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- CN104998510B CN104998510B CN201510488310.7A CN201510488310A CN104998510B CN 104998510 B CN104998510 B CN 104998510B CN 201510488310 A CN201510488310 A CN 201510488310A CN 104998510 B CN104998510 B CN 104998510B
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- China
- Prior art keywords
- magnetic
- gradient magnetic
- flue gas
- cleaner unit
- high gradient
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 239000010419 fine particle Substances 0.000 title claims abstract description 23
- 239000002245 particle Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052742 iron Inorganic materials 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 7
- 239000013618 particulate matter Substances 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 21
- 239000008188 pellet Substances 0.000 claims description 18
- 239000008187 granular material Substances 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000005307 ferromagnetism Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005389 magnetism Effects 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- -1 general cleaner unit Chemical compound 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the field of atmospheric pollution abatement, and particularly relates to a removing device and method for inhalable particles and fine particles in flue gas. The device comprises a general dust remover, a primary dust hopper, high-gradient magnetic dust removers, a secondary dust hopper and a vibration device. Electromagnets are installed on the two sides of a gas channel inside each high-gradient magnetic dust remover. Magnetism gathering media are perpendicular to the magnetic field direction and the gas flow direction. In the particle removing process, the general dust remover removes out particles with the diameter larger than or equal to 100 micrometers, residual flue gas containing inhalable particles and fine particles flows into any high-gradient magnetic dust remover to be captured by magnetism gathering media. By means of the removing device and method, the problem that a conventional dust remover is poor in effect of removing inhalable particles is solved, and pollution caused by particles produced by iron and steel enterprises on the atmosphere can be more effectively controlled.
Description
Technical field
The invention belongs to air contaminant treatment field, and in particular to pellet and fine particle in a kind of flue gas
Removing means and method.
Background technology
In recent years China's atmospheric environment problem is increasingly highlighted, and haze weather is multiple, has a strong impact on national physical and mental health.In a large number
Research shows, pellet in air（PM10）And fine particle（PM2.5）Concentration height is cause haze weather main
Reason.Although state functionaries improves the control standard granular material discharged to industry-by-industry, national annual granule density
Level has declined, but problems faced is still severe.
Iron and steel enterprise's particulate matter is resulted from each technical process of iron and steel production, and its analysis is wide, and ash-laden gas
Body discharge capacity is big, concentration is high, Dust is complicated, is industrial cigarette（Powder）One of dirt discharge significant contributor.Existing achievement in research
Show, in the PM10 and PM2.5 of iron and steel enterprise's discharge, mainly contain the metallic elements such as Fe, Si, Ca, K, Mn, Cu, Zn, Pb, with
And OC（Organic carbon）And EC（DIC）Deng harmful substance.
Conventional industrial dust collector species has a lot, according to the principle of its trap particulate matter can be divided into mechanical collector,
Wet scrubber, electrostatic precipitator, filtration dust catcher and electric bag compound type dust remover etc..These industrial dust collectors are used as protection
Ecological environment and the visual plant of recycling resource, have obtained extensive utilization in all trades and professions.Although these cleaner units
To total dirt（TSP）Removal efficiency it is very high or even can reach 99%, but the removal efficiency for PM10 and PM2.5 is low
It is many, removal efficiency η is often presentedTSP＞ ηPM10＞ ηPM2.5Trend.Trace it to its cause, be primarily due to these general cleaner units
Dust removal mechanism for small particle particulate matter effect it is very weak.For example, electrostatic precipitator mainly by charging particle it is adsorbed and
Removing, but granule of the particle diameter near 1 μm is very poor due to locating on the scene charged and diffusional charging mixed zone, its charge capacity, from
And it is difficult removing；For another example, sack cleaner mainly by inertial collision, intercept and spread removing, similarly, since near 1 μm
Grain is exactly in inertia and diffusion control mixed zone, and cloth bag is equally very low to its removal efficiency.Therefore, for small size particle
Removal need to research and develop new cleaner unit.
The content of the invention
For the problem that prior art is present, the present invention provides the de- of pellet and fine particle in a kind of flue gas
Except apparatus and method, it is therefore an objective to the pellet effectively in removing iron and steel factory smoke, reduce environmental pollution, solve industry
Problem of the cleaner unit to inhalable particulates removing scarce capacity.
Realize the removing means of pellet and fine particle in the object of the invention flue gas, including general cleaner unit,
One-level ash bucket, high gradient magnetic-type cleaner unit, second-level ash bucket and rapping apparatus；Wherein, the dust mouth of described general cleaner unit with
One-level ash bucket is connected, and gas outlet is connected by connecting pipe with two high gradient magnetic-type cleaner units, two high gradient magnetic-type dedustings
Device is arranged in parallel, and switch valve is provided with connecting pipe；
Described high gradient magnetic-type cleaner unit includes a housing, magnetic matrix is housed in enclosure interior, in enclosure interior
Gas passage both sides electric magnet is installed, magnetic matrix is perpendicular to magnetic direction and gas flow direction；High gradient magnetic-type is removed
The dust mouth of dirt device is connected with second-level ash bucket, and inlet pressure sensor is provided with its air inlet, is provided with gas outlet
Gas outlet pressure transducer, gas outlet is connected with clean flue gas pipeline, and described clean flue gas pipeline is open；
Described rapping apparatus is arranged on high gradient magnetic-type shell of dust remover.
Wherein, described general cleaner unit is filtration dust catcher or electrostatic precipitator.
Described magnetic matrix is the ferromagnetism porous media board of low-coercivity high magnetic permeability, and its porosity is more than 90%.
Pellet in flue gas and fine particle are removed method using above-mentioned removing means, according to following
Step is carried out：
（1）The ash-laden gas that each operation is produced in iron and steel production is made through general cleaner unit, by particle diameter in ash-laden gas >=
100 microns of particulate matter is removed, and removed particulate matter is fallen in one-level ash bucket；
（2）The remaining flue gas containing pellet and fine particle flows into any one high gradient magnetic-type cleaner unit
In, particulate matter is magnetized in the presence of high-gradient magnetic field, and the particulate matter being magnetized is under the influence of a magnetic field constantly to poly- magnetic Jie
Matter is close, is constantly condensed into the larger granule of particle diameter in approach process, and is finally captured by magnetic matrix, the flue gas being cleaned
Discharge from clean flue gas pipeline；
（3）Work as step（2）In high gradient magnetic-type cleaner unit inlet pressure and gas outlet constant pressure differential it is constant when,
Saturation trapping state is reached, the opposing magnetic field for incrementally increasing is passed through to magnetic matrix, while using mechanical shaking device to poly- magnetic
Medium carries out rapping, and the particulate matter for coming off falls in second-level ash bucket and is captured, while start switch valve, by remaining containing can
The flue gas of suction particulate matter and fine particle is introduced in another high gradient magnetic-type cleaner unit, the two alternation.
Compared with prior art, of the invention the characteristics of and beneficial effect are：
The operation principle of the removing means of pellet and fine particle is first with normal in the flue gas of the present invention
The general cleaner unit of rule removes the larger particulate matter of particle diameter in flue gas, is then applied using the electric magnet in high gradient magnetic-type cleaner unit
Plus magnetic field, make pellet and fine particle be magnetized, the particulate matter being magnetized is under the influence of a magnetic field constantly to poly- magnetic
Medium is close, is constantly condensed into the larger granule of particle diameter in approach process, and is finally captured by magnetic matrix.
To improve the work efficiency of dedusting, two high gradient magnetic-type cleaner units are included in the present invention, by pipeline between them
Connect and use Valve controlling, alternation can be switched, when a high gradient magnetic-type cleaner unit processes ash-laden gas, another
High gradient magnetic-type cleaner unit reaches saturation trapping state, carries out degaussing rapping.
The dust collection method provided using the present invention and device, overcome conventional dust removal device to inhalable particulates removing effect
Not good problem, can more effectively control pollution of iron and steel enterprise's particulate matter to air.
Description of the drawings
Fig. 1 is the process chart of the present invention；
Fig. 2 is the removing means structural representation of pellet and fine particle in flue gas of the invention；
Fig. 3 is the top view of Fig. 2；
Wherein：1：General cleaner unit；2：One-level ash bucket；3：High gradient magnetic-type cleaner unit；3-1：First high gradient magnetic-type is removed
Dirt device；3-2：Second high gradient magnetic-type cleaner unit；4：Second-level ash bucket；5：Rapping apparatus；6：Connecting pipe；7：Switch valve；8：
Magnetic matrix；9：Electric magnet；10：Inlet pressure sensor；11：Gas outlet pressure transducer；12：Clean flue gas pipeline；
Fig. 4 is the structural representation of the high gradient magnetic-type cleaner unit in Fig. 2 and Fig. 3；
Wherein：13：Coil；14：Iron core.
Specific embodiment
The inlet pressure sensor 10 and the model of gas outlet pressure transducer 11 that the present embodiment is adopted is ZNZ-PTB high-precision
Degree gas pressure sensor.
The removing means of pellet and fine particle in the flue gas of the present embodiment, including general cleaner unit 1, one-level
Ash bucket 2, high gradient magnetic-type cleaner unit 3, second-level ash bucket 4 and rapping apparatus 5；Wherein, the dust mouth of described general cleaner unit 1 with
One-level ash bucket 2 is connected, and gas outlet is by connecting pipe 6 and two high gradient magnetic-type cleaner units, i.e. the first high gradient magnetic-type dedusting
Device 3-1 and the second high gradient magnetic-type cleaner unit 3-2 is connected, and two high gradient magnetic-type cleaner units are arranged in parallel, on connecting pipe 6
Switch valve 7 is installed；
Described high gradient magnetic-type cleaner unit 3 includes a housing, magnetic matrix 8 is housed in enclosure interior, in housing
The gas passage both sides in portion are provided with electric magnet 9, and magnetic matrix 8 is perpendicular to magnetic direction and gas flow direction；High-gradient Magnetic
The dust mouth of formula cleaner unit 3 is connected with second-level ash bucket 4, and inlet pressure sensor 10, gas outlet are provided with its air inlet
Place is provided with gas outlet pressure transducer 11, and gas outlet is connected with clean flue gas pipeline 12, and described clean flue gas pipeline 12 is
Open；
Described rapping apparatus 5 is arranged on the housing of high gradient magnetic-type cleaner unit 3.
Described general cleaner unit 1 is filtration dust catcher or electrostatic precipitator.
Described magnetic matrix 8 is the ferromagnetism porous media board of low-coercivity high magnetic permeability, and its porosity is more than 90%,
5 ~ 10mm of magnetic matrix width during factory's practical application, distribution distance is less than 5mm in gas channel, and arrangement row is not less than 20
Row.
Described electric magnet 9 is as shown in figure 4, including coil 13 and iron core 14.
The method removed to pellet in flue gas and fine particle using the removing means of the present embodiment, is pressed
Carry out according to following steps：
（1）The ash-laden gas that each operation is produced in iron and steel production is made through general cleaner unit, by particle diameter in ash-laden gas >=
100 microns of particulate matter is removed, and removed particulate matter is fallen in one-level ash bucket；
（2）The remaining flue gas containing pellet and fine particle flows into any one high gradient magnetic-type cleaner unit
In, gas flow rate is less than 1.5m/s in control gas passage, and the magnetic flux density of background magnetic field is more than 1.0T, and particulate matter is in high gradient
It is magnetized in the presence of magnetic field, the particulate matter being magnetized is constantly close to magnetic matrix under the influence of a magnetic field, in approach process
In be constantly condensed into the larger granule of particle diameter, and finally captured by magnetic matrix, the flue gas being cleaned is arranged from clean flue gas pipeline
Go out；
（3）Work as step（2）In high gradient magnetic-type cleaner unit inlet pressure and gas outlet constant pressure differential it is constant when,
Saturation trapping state is reached, the opposing magnetic field for incrementally increasing is passed through to magnetic matrix, while using mechanical shaking device to poly- magnetic
Medium carries out rapping, and the particulate matter for coming off falls in second-level ash bucket and is captured, while start switch valve, by remaining containing can
The flue gas of suction particulate matter and fine particle is introduced in another high gradient magnetic-type cleaner unit, the two alternation.
Claims (3)
1. in a kind of flue gas pellet and fine particle removing means, it is characterised in that including general cleaner unit, one
Level ash bucket, high gradient magnetic-type cleaner unit, second-level ash bucket and rapping apparatus；Wherein, the dust mouth and of described general cleaner unit
Level ash bucket is connected, and gas outlet is connected by connecting pipe with two high gradient magnetic-type cleaner units, two high gradient magnetic-type cleaner units
It is arranged in parallel, switch valve is installed on connecting pipe；
Described high gradient magnetic-type cleaner unit includes a housing, and magnetic matrix, described magnetic matrix are housed in enclosure interior
It is the ferromagnetism porous media board of low-coercivity high magnetic permeability, its porosity is more than 90%, in the gas passage both sides of enclosure interior
Electric magnet is installed, magnetic matrix is perpendicular to magnetic direction and gas flow direction；The dust mouth of high gradient magnetic-type cleaner unit with
Second-level ash bucket is connected, and inlet pressure sensor is provided with its air inlet, and gas outlet pressure sensing is provided with gas outlet
Device, gas outlet is connected with clean flue gas pipeline, and described clean flue gas pipeline is open；
Described rapping apparatus is arranged on high gradient magnetic-type shell of dust remover.
2. in a kind of flue gas according to claim 1 pellet and fine particle removing means, its feature exists
In described general cleaner unit be filtration dust catcher or electrostatic precipitator.
3. side pellet in flue gas and fine particle removed using removing means as claimed in claim 1
Method, it is characterised in that follow the steps below：
（1）The ash-laden gas that each operation is produced in iron and steel production is made through general cleaner unit, particle diameter >=100 in ash-laden gas are micro-
The particulate matter of rice is removed, and removed particulate matter is fallen in one-level ash bucket；
（2）The remaining flue gas containing pellet and fine particle is flowed in any one high gradient magnetic-type cleaner unit,
Particulate matter is magnetized in the presence of high-gradient magnetic field, and the particulate matter being magnetized constantly is leaned on to magnetic matrix under the influence of a magnetic field
Closely, constantly it is condensed into the larger granule of particle diameter in approach process, and is finally captured by magnetic matrix, the flue gas being cleaned is from clean
Neat stress pipeline is discharged；
（3）Work as step（2）In high gradient magnetic-type cleaner unit inlet pressure and gas outlet constant pressure differential it is constant when, reach
Saturation traps state, the opposing magnetic field for incrementally increasing is passed through to magnetic matrix, while using mechanical shaking device to magnetic matrix
Rapping is carried out, the particulate matter for coming off falls in second-level ash bucket and is captured, while start switch valve, by remaining containing inhalable
The flue gas of particulate matter and fine particle is introduced in another high gradient magnetic-type cleaner unit, the two alternation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488310.7A CN104998510B (en) | 2015-08-11 | 2015-08-11 | Removing device and method for inhalable particles and fine particles in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510488310.7A CN104998510B (en) | 2015-08-11 | 2015-08-11 | Removing device and method for inhalable particles and fine particles in flue gas |
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| Publication Number | Publication Date |
|---|---|
| CN104998510A CN104998510A (en) | 2015-10-28 |
| CN104998510B true CN104998510B (en) | 2017-04-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396408A (en) * | 2015-11-27 | 2016-03-16 | 国家电网公司 | PM2.5 (fine particulate matter) removal system for thermal power plant |
| CN105562204B (en) * | 2015-12-30 | 2017-04-12 | 东北大学 | Flue gas purification device and method for trapping PM2.5-PM10 in advancing magnetic field by means of magnetic porous media |
| CN110801678B (en) * | 2019-11-19 | 2021-07-16 | 温岭市亚超童鞋业有限公司 | Dandelion-like self-dropping type filtering device for purifying heavily-polluted waste gas |
| CN113145856A (en) * | 2021-03-15 | 2021-07-23 | 西安交通大学 | System and method for separation, reduction and storage and transportation of iron oxidation products |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0983119A1 (en) * | 1998-03-23 | 2000-03-08 | Koninklijke Philips Electronics N.V. | Air cleaner |
| JP5079222B2 (en) * | 2005-05-24 | 2012-11-21 | 住友重機械工業株式会社 | Method and apparatus for processing zinc-containing iron oxide |
| CN101376122B (en) * | 2008-10-13 | 2010-06-09 | 宁波科宁达工业有限公司 | Magnetic dust-cleaning equipment |
| CN203803297U (en) * | 2014-01-21 | 2014-09-03 | 河北华北石油迪威尔石化设备厂 | Coalbed gas filter device |
| CN204911114U (en) * | 2015-08-11 | 2015-12-30 | 东北大学 | Inhalable particle and fine particles's desorption device in flue gas |
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