CN208526157U - A kind of processing unit for burning arsenical fume - Google Patents
A kind of processing unit for burning arsenical fume Download PDFInfo
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- CN208526157U CN208526157U CN201820507539.XU CN201820507539U CN208526157U CN 208526157 U CN208526157 U CN 208526157U CN 201820507539 U CN201820507539 U CN 201820507539U CN 208526157 U CN208526157 U CN 208526157U
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- mixing chamber
- liquid nitrogen
- arsenic
- ceramic tube
- electric precipitator
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- 239000003517 fume Substances 0.000 title claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000002156 mixing Methods 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 30
- 239000012716 precipitator Substances 0.000 claims abstract description 25
- 239000000919 ceramic Substances 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 48
- 239000003546 flue gas Substances 0.000 abstract description 48
- 229910052785 arsenic Inorganic materials 0.000 abstract description 35
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 35
- HJTAZXHBEBIQQX-UHFFFAOYSA-N 1,5-bis(chloromethyl)naphthalene Chemical compound C1=CC=C2C(CCl)=CC=CC2=C1CCl HJTAZXHBEBIQQX-UHFFFAOYSA-N 0.000 abstract description 26
- GOLCXWYRSKYTSP-UHFFFAOYSA-N arsenic trioxide Inorganic materials O1[As]2O[As]1O2 GOLCXWYRSKYTSP-UHFFFAOYSA-N 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 13
- 239000007789 gas Substances 0.000 abstract description 11
- 239000013078 crystal Substances 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 3
- 238000009834 vaporization Methods 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 241000223782 Ciliophora Species 0.000 description 15
- 241000051984 Blepharidachne Species 0.000 description 14
- 239000002245 particle Substances 0.000 description 12
- 239000002956 ash Substances 0.000 description 9
- 239000004744 fabric Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000006101 laboratory sample Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of processing unit for burning arsenical fume comprising ceramic tube deduster, liquid nitrogen bottle, mixing chamber, electric precipitator；Air inlet is provided on ceramic tube deduster, ceramic tube deduster bottom is provided with cinder-discharging port, ceramic tube house outlet is connected to mixing chamber bottom, liquid nitrogen bottle is connected to by valve with the liquid nitrogen entrance on mixing chamber top, mixing chamber upper outlet is connected to electric precipitator, exhaust outlet is provided on electric precipitator, mixing chamber bottom is provided with discharge port；The present apparatus absorbs a large amount of heat using liquid nitrogen vaporization, the solidification range of amorphous arsenic trioxide is quickly tided over, to obtain crystal form arsenic trioxide to greatest extent；Liquid nitrogen into flue gas does not react with gas component, will not change the chemical property of gas component；Arsenic is received using electric fishing, has only carried out the removing of arsenic；Whole process does not have the use of water, greatly reduces water consumption and subsequent cost of water treatment, and there are also the generations of the arsenic trioxide product of technical grade, improves environmental benefit and social benefit.
Description
Technical field
The utility model relates to a kind of processing units for burning arsenical fume, belong to field of environment engineering technology.
Background technique
For " about the opinion for accelerating propulsion conservation culture " for carrying out Party Central Committee's proposition, Guangxi Huanjiangmaonanzu is autonomous
Bureau of agriculture of county has introduced ciliate desert-grass planting technology, the ciliate desert-grass arsenic in Rapid Extraction, concentration and Enriching soil during the growth process,
By periodically gathering in the arsenic in ciliate desert-grass removal soil, to realize the purpose of rehabilitating soil.Introduction through bureau of agriculture, ciliate desert-grass meeting
Burning disposal is carried out, flue gas is handled using " chilling+wet dedusting+bag-type dust " device；Containing the arsenic of high concentration in lime-ash, press
Landfill disposal is carried out according to hazardous waste.
Not high incineration temperature is the major reason for causing the arsenic in lime-ash containing high concentration.Arsenic after usually burning is with three oxygen
Change the presence of two arsenic forms, and the sublimation temperature of arsenic trioxide is 313 DEG C, therefore ciliate desert-grass is in the combustion atmospheres higher than 313 DEG C
It will be greatly reduced arsenic content in lime-ash.Meanwhile the arsenic content in incineration flue gas will increase.
About the processing of arsenical fume, studied always both at home and abroad.German Lurgi proposes wet process arsenic removal process,
Patent DE19823227063 and DE3514471 are applied in processing copper blast furnace off-gas wet process arsenic removal；Shandong perseverance nation smelts stock
Part Co., Ltd proposes quenching arsenic removal process, and CN105536475A and CN205360870U are applied in processing metallurgy industry
High arsenic content ore high-temperature flue gas；CHINA ENFI ENGINEERING CORPORATION proposes the covert arsenic removal process of quenching, by patent
ZL.201310204680.4 and ZL.201420831059.0 is applied in processing non-ferrous metal industry arsenical fume；Kunming science and engineering
University proposes water flash distillation dry method arsenic removal process, and CN106377922A is applied in processing cloud copper blast furnace off-gas.It is above-mentioned various
Method can make arsenical fume qualified discharge, but a large amount of uses of smoke components, especially water are changed by cooling method,
So that subsequent water process load aggravates；It receives arsenic mode and is all made of cloth bag receipts arsenic.
Cloth bag receipts arsenic will exactly contain arsenic trioxide granular gas and enter in cylinder-shaped filter bag from lower part orifice plate, and air-flow passes through
When the hole of filter cloth, dust is captured on filtrate, is discharged, is deposited on filter cloth by outlet through the clean gas of filtrate
Arsenic trioxide splits away off from filter cloth surface under the action of machinery concussion, falls into ash bucket, completes to receive arsenic work.The receipts
The shortcomings that arsenic mode is: (1) arsenic trioxide is easy to be attached on cloth bag, causes cleaning difficult；(2) check and replace filter bag
When, it needs to enter cabinet, atmosphere containing arsenic is unfavorable to staff's health；(3) cloth bag arsenic removing apparatus occupied area is larger.
Compared to above-mentioned handled smelting arsenical fume, the flue gas handled by this has the following characteristics that (1) burns raw material
For the ciliate desert-grass of Guangxi Huan Jiangxian；(2) in Industrial Analysis, content of ashes 15.5%, compared to the 43.0% of general flue gas during smelting,
Ash content is few；(3) content of the main trace element in ciliate desert-grass is 318.39mg/Kg, and the arsenic content in ore is generally
192mg/Kg, compared to raw material are smelted, arsenic content is high；(4) in XRD test, it is not found S element and Cl element, phase
Than in flue gas during smelting, without the concern for flue gas acid dew point temperature；(5) there is N in ciliate desert-grass2、CO2Under atmosphere, the As at 600 DEG C
Mobility reach highest, and the temperature of flue gas during smelting is generally at 800 DEG C or more, and compared to flue gas during smelting, ciliate desert-grass burns cigarette
Temperature degree is lower；The document of arsenic is received about electric fishing at present and report was not met.
Summary of the invention
The utility model aim is to provide a kind of processing unit for burning arsenical fume, solves such as wet process arsenic removal process
The yield of bring sewage is big and mud arsenic leads to the problem of bring secondary pollution comprising ceramic tube deduster, liquid nitrogen bottle,
Mixing chamber, electric precipitator；Air inlet is provided on ceramic tube deduster, ceramic tube deduster bottom is provided with cinder-discharging port, ceramics
Pipe house outlet is connected to mixing chamber bottom, and liquid nitrogen bottle is connected to by valve with the liquid nitrogen entrance on mixing chamber top, mixing chamber
Upper outlet is connected to electric precipitator, and exhaust outlet is provided on electric precipitator, and mixing chamber bottom is provided with discharge port.
Flowmeter is provided between the liquid nitrogen bottle and mixing chamber.
Temperature monitor is provided at the mixing chamber outlet.
Above-mentioned apparatus is that the burning arsenical fume by temperature higher than 313 DEG C is passed through dedusting in ceramic tube deduster, after dedusting
Flue gas enters mixing chamber, while liquid nitrogen is passed through in mixing chamber, liquid nitrogen inversely contacted with flue gas make flue-gas temperature be down to 30 DEG C with
Under, the part arsenic trioxide particle for the precipitation that cools down be deposited to mixing chamber bottom discharge, another part arsenic trioxide particle with
Flue gas enter electric precipitator complete collecting, flue gas emission after arsenic removal.
Absorb a large amount of heat using liquid nitrogen vaporization makes flue-gas temperature be reduced to 30 DEG C in instantaneous cooling, to make three oxidations two
Arsenic forms crystalloid little particle, is trapped by electric precipitator.The principle that whole flow process receives arsenic is dense using the saturation of arsenic trioxide
The relationship of degree, crystal form and temperature, amorphous arsenic trioxide are the glassy mass of colorless amorphous, and temperature is at 175 ~ 250 DEG C
It is precipitated, crystalline state arsenic trioxide is trapped with graininess by electric precipitator when flue-gas temperature is reduced to 120 DEG C or less.
The characteristics of device is exactly: (1) the arsenic trioxide particulate matter being attached on the entrapment plate of electric precipitator is powering off
After be easy to fall off；(2) it does not need to change corona discharge electrode, reduces maintenance cost；(3) installation area of whole flow process is small, operation
It is easy, it is easy to accomplish automation control.
Above-mentioned apparatus is using steps are as follows:
(1) arsenical fume will be burned to enter in ceramic tube dust catcher device from air intake, under the solids such as ash content are collected
Carry out and enter discharger, and flue gas enters mixing chamber；
(2) after the flue gas of step (1) enters mixing chamber, the liquid nitrogen in liquid nitrogen gas cylinder enters mixing chamber, rapid vaporization, with height
Warm flue gas inversely mixes, and absorbs a large amount of heat, quickly spends 175 ~ 250 DEG C, be reduced to 30 DEG C, generates more crystalline state three and aoxidizes
Two arsenic particles, gas is other than the absolute magnitude of nitrogen increases at this time, other gas contents remain unchanged, and to the place of subsequent gases
Reason is without influence.Due to gravity, partial particulate can enter the discharger of mixing chamber bottom to be removed, some is then
Electric precipitator can be entered, realize and part gas solid separation, temperature prison are haved the function that by temperature controlled effect with mixing chamber
It surveys the flue gas that instrument comes out mixing chamber to be monitored, if flue gas does not reach requirement, be controlled by valve into mixing
The flow of room reaches required flue-gas temperature in turn；
(3) flue gas after step (2) cooling enters electric precipitator, flue gas cool-down, and crystal arsenic trioxide is directly caught pole
Plate collecting, the flue gas after arsenic removal can be expelled directly out.
A distance that pole plate has just enter into air-flow is caught, does not have particulate matter, the mainly arsenic trioxide of gas state not
Can be charged in ceramic tube deduster, it only could be charged when forming graininess.
Beneficial effects of the present invention:
(1) present invention only has liquid nitrogen to participate in reaction, will not generate secondary pollution, emit no waste water, and has to environmental protection
There is important meaning；
(2) flue gas after cooling down is identical as atmospheric temperature, not will cause periphery thermal pollution；
(3) the arsenic trioxide purity collected is higher, can be used as enterprise's production raw material, produces economic benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of utility model device；
In figure, 1- air inlet, 2- ceramic tube deduster, 3- liquid nitrogen bottle, 4- mixing chamber, 5- electric precipitator, 6- valve, 7- temperature
Spend monitor, 8- flowmeter, 9- cinder-discharging port, 10- discharge port, 11- exhaust outlet.
Specific embodiment
The utility model, but scope of protection of the utility model are described in further detail in the following with reference to the drawings and specific embodiments
It is not limited to content as described below.
Embodiment 1
Ciliate desert-grass used in the present embodiment is derived from Guangxi Huan Jiangxian, takes the top of ciliate desert-grass, dries in 70 DEG C of insulating box,
It is crushed again with pulverizer, finally crosses 0.18mm sieve and obtain laboratory sample, weigh sample and burned in incinerator, temperature is
620 DEG C, atmosphere is air；And with the rate of 400mL/min by Fig. 1 shown device, the device include ceramic tube deduster 2,
Liquid nitrogen bottle 3, mixing chamber 4, electric precipitator 5；Air inlet 1 is provided on ceramic tube deduster, ceramic tube deduster bottom is provided with
Cinder-discharging port 9, ceramic tube house outlet are connected to 4 bottom of mixing chamber, and liquid nitrogen bottle 3 passes through the liquid nitrogen of valve 6 and 4 top of mixing chamber
Entrance connection, 4 upper outlet of mixing chamber are connected to electric precipitator, exhaust outlet 11 are provided on electric precipitator, 4 bottom of mixing chamber is set
It is equipped with discharge port 10；4 exit of mixing chamber is provided with temperature monitor 7, is provided with flow between the liquid nitrogen bottle and mixing chamber
Meter 8.
The processing step for burning arsenical fume is specific as follows:
(1) arsenical fume will be burned and enters ceramic tube deduster 2 from air inlet 1, the solids such as ash content in flue gas will be cut
After staying, grey branch enters 2 bottom of ceramic tube deduster and is recycled by cinder-discharging port 9, and flue gas enters mixing chamber 4 after dedusting；
(2) it after the flue gas of step (1) enters mixing chamber 4, is mixed with liquid nitrogen, hybrid mode is reverse contact, flue gas
A large amount of arsenic trioxide crystal little particle can be precipitated to 30 DEG C in rapid drop in temperature；Due to there is no sour gas in flue gas, no
With acid dew-point temperature is considered, since the ingredient of flue gas is air, and ciliate desert-grass has also been dehydrated, when temperature is close to 30 DEG C of room temperature
It is not up to the dew-point temperature of air, so the arsenic trioxide particle being precipitated is dry；When temperature continues decline, can increase
The usage amount of liquid feeding nitrogen, and the arsenic trioxide particle being precipitated is seldom, economic cost increases, general it is not recommended that being lower than 30 DEG C.Analysis
Particle a part out can be fallen at the discharge port of mixing chamber, and another part can enter in electric precipitator 5 with flue gas；Temperature prison
It surveys instrument 7 to be monitored the flue gas come out from mixing chamber, when temperature does not reach requirement, then be controlled by valve 6 into mixed
The liquid nitrogen flow of room is closed to adjust caloric receptivity；
(3) flue gas after step (2) cooling enters in electric precipitator 5, and graininess arsenic trioxide can be by electric precipitator
Entrapment plate trapping, the flue gas after arsenic removal pass through 11 direct emission of exhaust outlet.
The removal efficiency of arsenic reaches 98% in the present embodiment flue gas, obtains arsenic trioxide crystal purity and reaches 99%.
Embodiment 2
Ciliate desert-grass used in the present embodiment is derived from Guangxi Huan Jiangxian, takes the top of ciliate desert-grass, dries in 70 DEG C of insulating box,
It is crushed again with pulverizer, finally crosses 0.18mm sieve and obtain laboratory sample, weigh sample and burned in incinerator, ignition temperature
It is 610 DEG C, atmosphere is air, and with the rate of 300mL/min by Fig. 1 device, apparatus structure is the same as embodiment 1；
The processing step for burning arsenical fume is specific as follows:
(1) arsenical fume will be burned and enters ceramic tube deduster 2 from air inlet 1, the solids such as ash content in flue gas will be cut
After staying, grey branch enters 2 bottom of ceramic tube deduster and is recycled by cinder-discharging port 9, and flue gas enters mixing chamber 4 after dedusting；
(2) it after the flue gas of step (1) enters mixing chamber 4, is mixed with liquid nitrogen, hybrid mode is reverse contact, flue gas
A large amount of arsenic trioxide crystal little particle can be precipitated to 30 DEG C in rapid drop in temperature；Due to there is no sour gas in flue gas, no
It can consider acid dew-point temperature, since the ingredient of flue gas is air, and ciliate desert-grass has also been dehydrated, when temperature is close to 30 DEG C of room temperature
It is not up to the dew-point temperature of air, so the arsenic trioxide particle being precipitated is dry；When temperature continues decline, can increase
The usage amount of liquid feeding nitrogen, and the arsenic trioxide particle being precipitated is seldom, economic cost increases, general it is not recommended that being lower than 30 DEG C.Analysis
Particle a part out can be fallen in the discharger of mixing chamber, and another part can enter in electric precipitator 5；Temperature monitor 7
The flue gas come out from mixing chamber is monitored, when temperature does not reach requirement, then entrance is controlled by valve 6, flowmeter 8
The liquid nitrogen flow of mixing chamber recepts the caloric to adjust；
(3) flue gas after step (2) cooling enters in electric precipitator 5, and graininess arsenic trioxide can be by electric precipitator
Entrapment plate trapping, the flue gas after arsenic removal pass through 11 direct emission of exhaust outlet.
The removal efficiency of arsenic reaches 99% in the present embodiment flue gas, obtains arsenic trioxide crystal purity and reaches 99%.
Claims (3)
1. a kind of processing unit for burning arsenical fume, it is characterised in that: including ceramic tube deduster (2), liquid nitrogen bottle (3), mix
Close room (4), electric precipitator (5)；It is provided on ceramic tube deduster air inlet (1), ceramic tube deduster bottom, which is provided with, unloads ash
Mouthful, ceramic tube house outlet is connected to mixing chamber (4) bottom, and liquid nitrogen bottle (3) passes through the liquid nitrogen of valve and mixing chamber (4) top
Entrance connection, mixing chamber (4) upper outlet are connected to electric precipitator, and exhaust outlet, mixing chamber (4) bottom are provided on electric precipitator
It is provided with discharge port.
2. the apparatus according to claim 1, it is characterised in that: be provided with flow between liquid nitrogen bottle (3) and mixing chamber (4)
Meter.
3. the apparatus according to claim 1, it is characterised in that: mixing chamber (4) exit is provided with temperature monitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820507539.XU CN208526157U (en) | 2018-04-11 | 2018-04-11 | A kind of processing unit for burning arsenical fume |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820507539.XU CN208526157U (en) | 2018-04-11 | 2018-04-11 | A kind of processing unit for burning arsenical fume |
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| Publication Number | Publication Date |
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| CN208526157U true CN208526157U (en) | 2019-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339361A (en) * | 2018-04-11 | 2018-07-31 | 昆明理工大学 | A kind of processing method and processing device for burning arsenical fume |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108339361A (en) * | 2018-04-11 | 2018-07-31 | 昆明理工大学 | A kind of processing method and processing device for burning arsenical fume |
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