CN103611383B - A kind of method of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant - Google Patents
A kind of method of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant Download PDFInfo
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- CN103611383B CN103611383B CN201310667661.5A CN201310667661A CN103611383B CN 103611383 B CN103611383 B CN 103611383B CN 201310667661 A CN201310667661 A CN 201310667661A CN 103611383 B CN103611383 B CN 103611383B
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- 239000000356 contaminant Substances 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 title claims abstract description 13
- 239000003517 fume Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 40
- 239000000428 dust Substances 0.000 claims abstract description 23
- 238000005054 agglomeration Methods 0.000 claims abstract description 16
- 230000002776 aggregation Effects 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 239000000376 reactant Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003352 sequestering agent Substances 0.000 claims description 7
- 239000013618 particulate matter Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 claims description 2
- 239000003500 flue dust Substances 0.000 claims description 2
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 11
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 229910052602 gypsum Inorganic materials 0.000 abstract description 6
- 239000010440 gypsum Substances 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 239000003546 flue gas Substances 0.000 description 15
- 239000000779 smoke Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000013522 chelant Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000005685 electric field effect Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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Abstract
The present invention relates to the apparatus and method of a kind of cooperation-removal fire coal boiler fume ultra-fine grain and trace contaminant. The present invention adopts and is disposed with the pre-spray equipment of adsorbent, ultra-fine grain agglomeration device, adsorbent adding apparatus and bag-type dust collector before desulfurizer along airflow direction, is disposed with the technological process of spraying and cleaning apparatus, reactant adding apparatus and Wet type electric dust-removing device after desulfurizer. Heavy metal, two English etc. such as PM2.5 ultra-fine grain, " gypsum rain ", hydrargyrum are ultra-fine and trace contaminant the removal efficiency of the present invention is high, operating cost is low, overhaul and operation maintenance is convenient, it is adaptable to the pollutant purification in fire coal boiler fume.
Description
Technical field
The present invention relates to a kind of method removing fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant, particularly relate to a kind of cooperation-removal method being made up of the pre-spray equipment of adsorbent, ultra-fine grain agglomeration device, adsorbent adding apparatus, bag-type dust collector, spraying and cleaning apparatus, reactant adding apparatus and Wet type electric dust-removing device etc.
Background technology
Though the coal combustion pollutant removing of China and control technology have obtained commercial Application widely, but the discharge heavily endangering pollutant for PM2.5 ultra-fine grain and trace fails to play significant control and removal effect. This type of can carcinogenic, teratogenesis, mutagenic heavy harm pollutant include: the organic pollutions such as heavy metal, two English such as below PM10 particulate matter (especially PM2.5), hydrargyrum. Research and detection show, in coal-fired plant flue gas, below PM2.5 particulate matter accounts for the ratio of particle total amount more than 80%, and the organic pollutions such as gaseous mercury and particle mercury higher than 50% are discharged into air, two English are once be formed, and the ratio being captured is lower than 20%. Additionally, " gypsum rain " phenomenon produced by desulfurizer also comparatively generally occurs, destroy local environment, be badly in need of being addressed. The elimination heavily endangering pollutant of PM2.5 ultra-fine grain and trace is increasingly becoming the international forward position focus of current basic research and technological development.
The present invention adopts the mechanism such as physics and chemisorbed, particle agglomeration, chelatropic reaction, the ultra-fine and trace contaminant such as heavy metal, two English such as cooperation-removal PM2.5 ultra-fine grain, " gypsum rain ", hydrargyrum.
Summary of the invention
A kind of method that it is an object of the invention to provide cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant, adopt and before desulfurizer, set gradually the pre-spray equipment of adsorbent, ultra-fine grain agglomeration device, adsorbent adding apparatus and bag-type dust collector along airflow direction, after desulfurizer, set gradually the cooperation-removal method of spraying and cleaning apparatus, reactant adding apparatus and Wet type electric dust-removing device. Heavy metal, two English etc. such as PM2.5 ultra-fine grain, " gypsum rain ", hydrargyrum are ultra-fine and trace contaminant the removal efficiency of the present invention is high, operating cost is low, overhaul and operation maintenance is convenient, it is adaptable to the pollutant purification in fire coal boiler fume.
For reaching above-mentioned purpose, the ultra-fine grain agglomeration device of the present invention is made up of high-voltage discharging electrode etc. Ultra-fine grain agglomeration device working voltage is at about 60kV. Enter the ultra-fine grains such as the bulky grain in ultra-fine grain agglomeration device flue gas and PM2.5 under high voltage electric field effect by the charged bulky grain that agglomerates into, enter in follow-up bag-type dust collector with flue gas, improve the bag-type dust collector removal efficiency to ultra-fine grains such as PM2.5.
The bag-type dust collector of the present invention connects the pre-spray equipment of adsorbent, ultra-fine grain agglomeration device and adsorbent adding apparatus respectively. Before bag-type dust collector puts into operation and during overhaul, the pre-spray equipment of adsorbent sprayed into adsorbent before ultra-fine grain agglomeration device, and after airflow uniform distribution, adsorbent uniform fold is on bag-type dust collector filter bag surface. At bag-type dust collector run duration, the pre-spray equipment of adsorbent is out of service, and adsorbent adding apparatus puts into operation. The adsorbent that the pre-spray equipment of adsorbent sprays into is identical with the adsorbent added in adsorbent adding apparatus. In bag-type dust collector running, the adsorbent added by adsorbent adding apparatus continues heavy metal and two English etc. such as non-aggregated in flue gas or the PM2.5 ultra-fine grain of absorption, hydrargyrum are played adsorption, thus removing further. PM2.5 ultra-fine grain in flue gas and trace contaminant are carried out further absorption and filter by the uniform fold adsorbent on filter bag surface, thus obtaining high-efficient purification effect.
The Wet type electric dust-removing device of the present invention is coupled reaction agent adding apparatus and spraying and cleaning apparatus respectively. Flue gas enters after Wet type electric dust-removing device through desulfurizer, water smoke is sprayed to corona zone and discharge electrode by spraying and cleaning apparatus, after corona field that water smoke is formed at arista electrode is charged, heavy metal, two English etc. such as PM2.5 ultra-fine grain, " gypsum rain ", hydrargyrum are ultra-fine and trace contaminant plays trapping effect, is finally collected in dust collecting electrode and rinses. Organic sequestering agent is added in spraying and cleaning apparatus by reactant adding apparatus, it is injected into Wet type electric dust-removing device with water smoke, organic sequestering agent and the contents of many kinds of heavy metal ion generation chelatropic reaction in moisture film, generate stable and water-fast metallo-chelate, so that the micro heavy pollutant in flue gas are able to efficient removal. Clean flue gas after Wet type electric dust-removing device purifies passes through smoke stack emission.
The adsorbent of the present invention is have the cellular formed after the flyash of certain phosphorus content is modified activation, the particulate matter that specific surface area is abundant, has physics and chemisorbed function simultaneously. Its mean diameter at about 20 μm, specific surface area > 55m2/ g, unburned carbon in flue dust is at about 6%-7%.
The organic sequestering agent of the present invention is water miscible macromolecular organic compound.
Compared with prior art, the invention have the characteristics that:
(1) owing to have employed the mechanism such as physics and chemisorbed, particle agglomeration, chelatropic reaction, fire coal boiler fume containing PM2.5 ultra-fine grain and trace contaminant is through synergistic purification, removal efficiency is high, and after elimination, quality and the quantity of the PM2.5 ultra-fine grain in clean flue gas and trace contaminant are greatly lowered. Adopt removing means and the removal methods of the present invention, export dust emission≤10mg/Nm3; PM2.5 ultra-fine grain and trace contaminant capture rate >=90%.
(2) owing to the adsorbent adopted is by having the flyash of certain phosphorus content as carrier, operating cost is low.
(3) Wet type electric dust-removing device of the present invention adopt water miscible macromolecule organic sequestering agent as the chelatropic reaction agent of heavy metal contaminants.
(4) present invention has the feature such as maintenance and operation maintenance convenience.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the process flow diagram of patent of the present invention.
In figure: 1. the pre-spray equipment of adsorbent, 2. ultra-fine grain agglomeration device, 3. adsorbent adding apparatus, 4. bag-type dust collector, 5. desulfurizer, 6. spraying and cleaning apparatus, 7. Wet type electric dust-removing device, 8. reactant adding apparatus, 9. chimney.
Detailed description of the invention
It is disposed with the pre-spray equipment of adsorbent (1), ultra-fine grain agglomeration device (2), adsorbent adding apparatus (3) and bag-type dust collector (4) along airflow direction desulfurizer (5) is front in FIG, after desulfurizer (5), is disposed with spraying and cleaning apparatus (6), reactant adding apparatus (8) and Wet type electric dust-removing device (7).
When the present invention cooperation-removal device place in working order time, fire coal boiler fume enters ultra-fine grain agglomeration device (2), the ultra-fine grain such as bulky grain and PM2.5 in flue gas under high voltage electric field effect by the charged bulky grain that agglomerates into, enter in follow-up bag-type dust collector (4) with flue gas, improve the bag-type dust collector removal efficiency to ultra-fine grains such as PM2.5. Before bag-type dust collector (4) puts into operation and during overhaul, the pre-spray equipment of adsorbent (1) sprayed into adsorbent before ultra-fine grain agglomeration device (2), and after airflow uniform distribution, adsorbent uniform fold is on bag-type dust collector (4) filter bag surface. At bag-type dust collector (4) run duration, the pre-spray equipment of adsorbent (1) is out of service, and adsorbent adding apparatus (3) puts into operation. In bag-type dust collector (4) running, the adsorbent added by adsorbent adding apparatus (3) continues heavy metal and two English etc. such as non-aggregated in flue gas or the PM2.5 ultra-fine grain of absorption, hydrargyrum are played adsorption, thus removing further. Flue gas enters Wet type electric dust-removing device (7) through desulfurizer (5) subsequently, water smoke is sprayed to corona zone and discharge electrode by spraying and cleaning apparatus (6), after corona field that water smoke is formed at arista electrode is charged, heavy metal, two English etc. such as PM2.5 ultra-fine grain, " gypsum rain ", hydrargyrum are ultra-fine and trace contaminant plays trapping effect, is finally collected in dust collecting electrode and rinses. Organic sequestering agent is added in spraying and cleaning apparatus (6) by reactant adding apparatus (8), it is injected into Wet type electric dust-removing device (7) with water smoke, organic sequestering agent and the contents of many kinds of heavy metal ion generation chelatropic reaction in moisture film, generate stable and water-fast metallo-chelate, so that the micro heavy pollutant in flue gas are able to efficient removal. Clean flue gas after Wet type electric dust-removing device (7) purifies is by chimney (9) discharge.
Above are only the specific embodiment of the present invention, the technical characteristic of the present invention is not limited to this, change that any those skilled in the art makees in the field of the invention or modify the scope of the claims that all should include the present invention in.
Claims (2)
1. a method for cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant, wherein the device of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant is mainly by the pre-spray equipment of adsorbent, ultra-fine grain agglomeration device, adsorbent adding apparatus, bag-type dust collector, spraying and cleaning apparatus, reactant adding apparatus, Wet type electric dust-removing device, desulfurizer and chimney composition, it is characterised in that: before desulfurizer, it is disposed with the pre-spray equipment of adsorbent along airflow direction, ultra-fine grain agglomeration device, adsorbent adding apparatus and bag-type dust collector, be disposed with spraying and cleaning apparatus after desulfurizer, reactant adding apparatus and Wet type electric dust-removing device, the adsorbent that the pre-spray equipment of adsorbent and adsorbent adding apparatus spray into is have the cellular formed after the flyash of certain phosphorus content is modified activation, the particulate matter that specific surface area is abundant, has physics and chemisorbed function simultaneously, its mean diameter at about 20 μm, specific surface area > 55m2/ g, unburned carbon in flue dust is at 6%-7%.
2. the method for a kind of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain according to claim 1 and trace contaminant, it is characterised in that: organic sequestering agent affiliated in reactant adding apparatus is water miscible macromolecular organic compound.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667661.5A CN103611383B (en) | 2013-12-11 | 2013-12-11 | A kind of method of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant |
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| CN201310667661.5A CN103611383B (en) | 2013-12-11 | 2013-12-11 | A kind of method of cooperation-removal fire coal boiler fume PM2.5 ultra-fine grain and trace contaminant |
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| Publication Number | Publication Date |
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| CN103611383A CN103611383A (en) | 2014-03-05 |
| CN103611383B true CN103611383B (en) | 2016-06-15 |
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| CN107262281A (en) * | 2016-04-08 | 2017-10-20 | 北京龙电宏泰环保科技有限公司 | A kind of method for controlling industrial smoke ultra-fine grain and the ultra-clean discharge of trace contaminant |
| CN107930316A (en) * | 2017-11-14 | 2018-04-20 | 张静 | A kind of oil fog purification plant and its application process |
| CN112023623A (en) * | 2020-08-27 | 2020-12-04 | 北京龙电宏泰环保科技有限公司 | Device and method for efficient adsorption and agglomeration removal of ultrafine particles and heavy metal mercury |
| CN113464968A (en) * | 2021-08-05 | 2021-10-01 | 北京龙电宏泰环保科技有限公司 | W-shaped flame furnace flue gas deep energy-saving and ultra-clean emission cooperative control method |
| CN117509668A (en) * | 2023-10-11 | 2024-02-06 | 湖北兴福电子材料股份有限公司 | Production device and production method for directly producing electronic grade ammonia water by ammonia gas |
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| JP2000135411A (en) * | 1998-10-29 | 2000-05-16 | Tanabe Kogyo Kk | Exhaust gas treatment device and method of manufacturing the same |
| CN1498673A (en) * | 2002-11-06 | 2004-05-26 | 清华大学 | A method and device for integrating flue gas desulfurization and dust removal in a circulating fluidized bed |
| CN1895745A (en) * | 2006-06-29 | 2007-01-17 | 上海交通大学 | Mercury removal for smoke desulfurizing system by fortified wetting method |
| CN101574617B (en) * | 2009-06-12 | 2012-02-01 | 四川大学 | Simultaneous desulfurization and denitrification method for resource utilization of coal-fired flue gas pyrolusite slurry |
| CN102423599A (en) * | 2011-09-02 | 2012-04-25 | 北京龙电宏泰环保科技有限公司 | Electric bag composite purification device for integrated removal of industrially-discharged ultrafine and micro pollutants, and purification method thereof |
| CN202683014U (en) * | 2012-07-20 | 2013-01-23 | 中电投远达环保工程有限公司 | Dry-wet hybrid precipitation and desulfurization system for coal-fired flue gas |
| CN203710855U (en) * | 2013-12-11 | 2014-07-16 | 北京龙电宏泰环保科技有限公司 | Device for cooperatively removing ultrafine particles and micropollutants in flue gas of coal-fired boiler |
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