CN104075583B - A kind of alumina roasting furnace dust arrester installation and method - Google Patents
A kind of alumina roasting furnace dust arrester installation and method Download PDFInfo
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- CN104075583B CN104075583B CN201410333373.0A CN201410333373A CN104075583B CN 104075583 B CN104075583 B CN 104075583B CN 201410333373 A CN201410333373 A CN 201410333373A CN 104075583 B CN104075583 B CN 104075583B
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- China
- Prior art keywords
- distributor
- bagroom
- roasting furnace
- pipeline
- dust arrester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000428 dust Substances 0.000 title claims abstract description 52
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000009434 installation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 241001482108 Alosa pseudoharengus Species 0.000 claims abstract description 9
- 238000009826 distribution Methods 0.000 claims abstract description 9
- 230000008676 import Effects 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 19
- 239000003546 flue gas Substances 0.000 abstract description 19
- 239000007789 gas Substances 0.000 abstract description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 7
- 238000000746 purification Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of alumina roasting furnace dust arrester installation and method, this dust arrester installation comprises: bagroom; First distributor, one end of this first distributor is connected with the exhanst gas outlet of roaster, and the other end is connected with described bagroom by pipeline, and this first distributor is a casing, in casing, airflow-distribution board is installed, this airflow-distribution board form import thin, export thick tapering trumpet-like passage; Second distributor, one end of this second distributor is connected with described bagroom by pipeline, and the other end is connected with blower fan, and this second distributor is a casing; Gray back pipeline, one end of this gray back pipeline is connected with described bagroom, and the other end is connected with roaster.The invention provides a kind of in aluminum oxide roasting furnace flue gas purification process, efficient stable operations, energy-saving safe, exhaust emissions concentration can reach the alumina roasting furnace bag collection device and method of state environmental emissioning standard requirement, for substituting the electric dust and flue gas process for purifying of existing roaster.
Description
Technical field
The present invention relates to a kind of dust arrester installation and method, be specifically related to a kind of the alumina roasting furnace dust arrester installation and the method that use bagroom.
Background technology
What current alumina industry purifying fume from calcining furnace process adopted is all cottrell, but its use exists problems: 1, by the restriction of its structure, principle, cannot catch alumina ultrafine particle, emissions concentration is all at 50mg/m
3above, even higher.And country issues and specifies the concentration of emission limit value 10mg/Nm of the particle of alumina producer roaster in " the aluminum i ndustry pollutant emission standard " implemented on December 27th, 2013
3, at all cannot be up to standard.2, in production process, hydroxide particle-size fluctuation is large, and when granularity refinement, electricity gathers dust and cannot meet the demands.3, electricity gathers dust, and to consume electric energy high, and operating cost is large, and fault is many, and efficiency of dust collection fluctuation is large, and maintenance cost is high.4, the most key, during roaster fluctuation, fuel combustion is not exclusively understood some CO gas and is entered in electric precipitation, meet electricity gather dust short circuit dischange time easily blast, there is severe compromise.
Because aluminum oxide roasting furnace flue gas composition and operating mode are different from the special circumstances of other industry roaster, conventional bag collection technology cannot be suitable for, mainly there is following several respects technical barrier: 1, aluminum oxide roasting furnace flue gas temperature is higher, fluctuation is large, especially during fault stop jumping, flue-gas temperature can reach more than 300 DEG C, adopts bag collection easily to cause cloth bag to burn out, and adopting special refractory glass fibre material to make cloth bag, the dustiness of outlet again cannot be up to standard.2, high, the high humidity of flue gas moisture in alumina roasting furnace, water content reaches more than 35%, especially the alumina roasting furnace of coke-stove gas and fuelled with natural gas is adopted, smoke moisture is more up to more than 40%, control bad easy condensation to cause cloth bag to harden can not to use, particularly when back-blowing, often because air quantity is large, can cause flue gas and filter cloth contact surface temperature can lower than dew point, after the time is long, filter cloth hardens.3, bagroom filtration pressure difference is comparatively large, can impact roaster system negative pressure and blower fan, reduces pressure reduction and filter area can be caused to increase, occupation of land and investment are increased considerably.4, aluminum oxide dust hardness is comparatively large, and filter process wind speed is improper easily causes the cloth bag that weares and teares.Above problem, causes conventional bag collection device can not extensive use in aluminum oxide roasting furnace flue gas purification process.Therefore, so far, metallurgical grade commercial alumina process for purifying fume from calcining furnace still adopts electric dust-collecting method.
Summary of the invention
Along with the development of bagroom technology and cloth bag material, its technology reaches its maturity.Bagroom has that efficiency of dust collection is high, good stability, operation, maintenance cost are low, not by the feature such as impact of dust kind and import dustiness, meanwhile, bagroom is inner without electricity consumption facility, even if CO exceeds standard in flue gas, also can not blast, security is high.
Object of the present invention is exactly the deficiency existed for existing technology, the particularity of combined aluminum oxide baking furnace fume operating mode, there is provided a kind of in aluminum oxide roasting furnace flue gas purification process, the alumina roasting furnace dust arrester installation that energy efficient stable runs, safety coefficient is high, exhaust emissions concentration can reach state environmental emissioning standard requirement and method.
The object of the invention is to be achieved through the following technical solutions.
A kind of alumina roasting furnace dust arrester installation, it is characterized in that, this dust arrester installation comprises:
Bagroom;
First distributor, one end of this first distributor is connected with the exhanst gas outlet of roaster, the other end is connected with described bagroom by pipeline, this first distributor is a casing, multiple airflow-distribution board is installed in casing, formed between neighboring gas flow distribution grid import thin, export thick tapering trumpet-like passage;
Second distributor, one end of this second distributor is connected with described bagroom by pipeline, and the other end is connected with blower fan, and this second distributor is a casing;
Gray back pipeline, one end of this gray back pipeline is connected with described bagroom, and the other end is connected with roaster.
A kind of alumina roasting furnace dust arrester installation of the present invention, it is characterized in that, the pipeline between described first distributor and described bagroom is many, the pipeline between described second distributor and described bagroom is many.
A kind of alumina roasting furnace dust arrester installation of the present invention, it is characterized in that, be provided with the filter element identical with the number of tubes between described first distributor and described bagroom in described bagroom, the pipeline between described first distributor and described bagroom is communicated with respectively with described filter element.
A kind of alumina roasting furnace dust arrester installation of the present invention, is characterized in that, the pipeline between described first distributor and described bagroom is provided with cold-air flap and temperature measuring equipment, and this temperature measuring equipment is connected with the control device for controlling cold-air flap.
A kind of alumina roasting furnace dust arrester installation of the present invention, is characterized in that, described temperature measuring equipment is thermocouple thermometer or thermal resistance thermometer.
A kind of alumina roasting furnace dust arrester installation of the present invention, is characterized in that, described control device is PLC or DCS.
A kind of alumina roasting furnace collecting method, is characterized in that, the method uses bagroom to gather dust.
A kind of alumina roasting furnace collecting method, it is characterized in that, the method uses above-mentioned alumina roasting furnace dust arrester installation to gather dust.
A kind of alumina roasting furnace collecting method of the present invention, is characterized in that, described bagroom inner filtration wind speed is 0.5-0.8m/min.
A kind of alumina roasting furnace collecting method of the present invention, is characterized in that, the inlet outlet pressure differential of described bagroom is 400-1000Pa.
Bag collection device of the present invention can substitute cottrell, and stable application is in alumina roasting furnace, and safety coefficient is high, and dust collection effect is good, and exhaust emissions concentration can reach the requirement of state environmental emissioning standard.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Detailed description of the invention
See Fig. 1, alumina roasting furnace dust arrester installation of the present invention comprises:
Bagroom 1, first distributor 2, one end of first distributor 2 is connected with the exhanst gas outlet of roaster 3, the other end is connected with bagroom 1 by pipeline, first distributor 2 is a casing, arranges multiple airflow-distribution board 10 in casing, formed between neighboring gas flow distribution grid import thin, export thick tapering trumpet-like passage, its effect is each passage making flue gas stream enter bagroom comparatively uniformly, avoids flue gas inequality to cause certain filter element load that gathers dust excessive.The effect of the first distributor 2 ensures that the flue gas entered in bagroom 1 realizes uniform distribution.One end of second distributor 4 is connected with bagroom 1 by pipeline, and for the flue gas after collection and purification, the other end of the second distributor 4 is connected with blower fan 5.A kind of alumina roasting furnace dust arrester installation of the present invention also comprises gray back pipeline 6, and its one end is connected with bagroom 1, and the other end is connected with roaster 3, and the material that gathers dust in bagroom 1 is back in roaster 3 by gray back pipeline 6, carries out after baking.Pipeline in alumina roasting furnace dust arrester installation between the first distributor 2 and bagroom 1 can be many, makes the flue gas that need purify evenly and enters fast in bagroom 1.Same, the pipeline between the second distributor 4 and bagroom 1 also can be many.
Filter element is provided with in bagroom 1, the quantity of this filter element is identical with the number of tubes between the first distributor 2 and bagroom 1, the connection that pipeline between first distributor 2 and bagroom 1 is corresponding respectively with filter element, i.e. multiple filter element parallel operation, the flue gas entered in bagroom 1 by different pipeline can be filtered and purified in the filter element corresponding with entering pipeline, improves the efficiency and effect of gathering dust.
During work, the flue gas that alumina roasting furnace 3 produces enters the first distributor 2 from exhanst gas outlet, and uniform distribution is carried out under the effect of airflow-distribution board, enter in bagroom 1 by pipeline subsequently, purify in filter element, purify up to standard after flue gas entered in the second distributor 4 by another pipeline, under the effect of blower fan 5, discharge dust arrester installation subsequently.The material that gathers dust in bagroom 1 is back in roaster 3 by gray back pipeline 6, carries out after baking.
In alumina roasting furnace dust arrester installation of the present invention, the pipeline between the first distributor 2 and bagroom 1 is provided with cold-air flap 7 and temperature measuring equipment 8, this temperature measuring equipment 8 is connected with the control device 9 for controlling cold-air flap 7 intake.The flue-gas temperature detected is fed back to control device 9 by temperature measuring equipment 8, measured temperature value and design temperature compare by control device 9, the intake of automatic adjustment cold-air flap 7, ensure that bagroom 1 inlet temperature is no more than the temperature required by cloth bag material, and be not less than close dew temperature, avoid cloth bag to burn out and smoke condensation.Temperature measuring equipment can select thermocouple thermometer or thermal resistance thermometer.Control device is PLC or DSC.
The back-blowing of bagroom adopts pulsation to be interrupted back-flushing technique, namely the cloth bag back-blowing time is very short, blow number of times more, by the discharging of system negative pressure, blowback air quantity each during cloth bag blowback is 1% of traditional air quantity, and blowback number of times can reach 60 beats/min, the cold blast rate entering cloth bag during so each blowing is very little, there will not be dew condensation phenomenon, but also ensure that and unload grey effect, thus thoroughly solve the technical barrier causing filter cloth to harden because Fume moisture is large.
When using alumina roasting furnace dust arrester installation of the present invention to gather dust, bagroom 1 inner filtration wind speed is that 0.5-0.8m/min is advisable, and the inlet outlet pressure differential of bagroom 1 controls at 400-1000Pa, can realize investing the best combination with effect.
Embodiment 1
In certain company 4# alumina roasting furnace electric cleaner southern side, 1 tablecloth bag collector is installed, draws part of smoke from the pipeline of 4# roaster electric precipitation import, be connected with dust arrester installation entrance of the present invention with the pipeline of DN450.Through detecting, after gathering dust with collecting method of the present invention, emptying tail gas dust content can reach 10mg/Nm
3below.Process conditions: filtration velocity 0.5m/min, during pressure reduction 400Pa, cloth bag inlet temperature 148-178 DEG C, the average 4.05mg/Nm of outlet dustiness
3.
Embodiment 2
In certain company 4# alumina roasting furnace electric cleaner southern side, 1 tablecloth bag collector is installed, draws part of smoke from the pipeline of 4# roaster electric precipitation import, be connected with dust arrester installation entrance of the present invention with the pipeline of DN450.Through detecting, after gathering dust with collecting method of the present invention, emptying tail gas dust content can reach 10mg/Nm
3below.Process conditions: filtration velocity 0.8m/min, during pressure reduction 1000Pa, cloth bag inlet temperature 144-170 DEG C, the average 7.16mg/Nm of outlet dustiness
3.
Claims (9)
1. an alumina roasting furnace dust arrester installation, is characterized in that, this dust arrester installation comprises:
Bagroom;
First distributor, one end of this first distributor is connected with the exhanst gas outlet of roaster, the other end is connected with described bagroom by pipeline, this first distributor is a casing, multiple airflow-distribution board is installed in casing, formed between neighboring gas flow distribution grid import thin, export thick tapering trumpet-like passage;
Second distributor, one end of this second distributor is connected with described bagroom by pipeline, and the other end is connected with blower fan, and this second distributor is a casing;
Gray back pipeline, one end of this gray back pipeline is connected with described bagroom, and the other end is connected with roaster.
2. alumina roasting furnace dust arrester installation according to claim 1, is characterized in that, the pipeline between described first distributor and described bagroom is many, and the pipeline between described second distributor and described bagroom is many.
3. alumina roasting furnace dust arrester installation according to claim 1, it is characterized in that, be provided with the filter element identical with the number of tubes between described first distributor and described bagroom in described bagroom, the pipeline between described first distributor and described bagroom is communicated with respectively with described filter element.
4. alumina roasting furnace dust arrester installation according to claim 1, it is characterized in that, pipeline between described first distributor and described bagroom is provided with cold-air flap and temperature measuring equipment, and this temperature measuring equipment is connected with the control device for controlling cold-air flap.
5. alumina roasting furnace dust arrester installation according to claim 4, is characterized in that, described temperature measuring equipment is thermocouple thermometer or thermal resistance thermometer.
6. alumina roasting furnace dust arrester installation according to claim 4, is characterized in that, described control device is PLC or DCS.
7. an alumina roasting furnace collecting method, is characterized in that, the method uses and gathers dust according to the alumina roasting furnace dust arrester installation one of claim 1-6 Suo Shu.
8. a kind of alumina roasting furnace collecting method according to claim 7, is characterized in that, described bagroom inner filtration wind speed is 0.5-0.8m/min.
9. a kind of alumina roasting furnace collecting method according to claim 7, is characterized in that, the inlet outlet pressure differential of described bagroom is 400-1000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333373.0A CN104075583B (en) | 2014-07-15 | 2014-07-15 | A kind of alumina roasting furnace dust arrester installation and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333373.0A CN104075583B (en) | 2014-07-15 | 2014-07-15 | A kind of alumina roasting furnace dust arrester installation and method |
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| Publication Number | Publication Date |
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| CN104075583A CN104075583A (en) | 2014-10-01 |
| CN104075583B true CN104075583B (en) | 2016-03-30 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495195B (en) * | 2016-12-05 | 2017-09-05 | 沈阳鑫博工业技术股份有限公司 | A kind of multifunctional roasting device and control method |
| CN110094986A (en) * | 2018-01-31 | 2019-08-06 | 沈阳铝镁设计研究院有限公司 | Reduce the device of aluminum oxide roasting furnace flue gas dust concentration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141734A (en) * | 1983-11-07 | 1992-08-25 | Aluminum Company Of America | Steam producing process |
| CN201032399Y (en) * | 2007-03-22 | 2008-03-05 | 中国铝业股份有限公司 | Kiln end dust collecting device of aluminum oxide calcin kiln |
| CN102743946A (en) * | 2012-07-10 | 2012-10-24 | 中国铝业股份有限公司 | Alumina calcination dust collecting system |
| CN203672160U (en) * | 2014-01-14 | 2014-06-25 | 沈阳铝镁设计研究院有限公司 | Recovery device of dust in smoke of aluminum hydroxide roasting furnace |
-
2014
- 2014-07-15 CN CN201410333373.0A patent/CN104075583B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141734A (en) * | 1983-11-07 | 1992-08-25 | Aluminum Company Of America | Steam producing process |
| CN201032399Y (en) * | 2007-03-22 | 2008-03-05 | 中国铝业股份有限公司 | Kiln end dust collecting device of aluminum oxide calcin kiln |
| CN102743946A (en) * | 2012-07-10 | 2012-10-24 | 中国铝业股份有限公司 | Alumina calcination dust collecting system |
| CN203672160U (en) * | 2014-01-14 | 2014-06-25 | 沈阳铝镁设计研究院有限公司 | Recovery device of dust in smoke of aluminum hydroxide roasting furnace |
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| CN104075583A (en) | 2014-10-01 |
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