CN103933811A - Optical fiber perform rod sintering tail gas processing apparatus and method - Google Patents
Optical fiber perform rod sintering tail gas processing apparatus and method Download PDFInfo
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- CN103933811A CN103933811A CN201410061147.1A CN201410061147A CN103933811A CN 103933811 A CN103933811 A CN 103933811A CN 201410061147 A CN201410061147 A CN 201410061147A CN 103933811 A CN103933811 A CN 103933811A
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- tube
- tube settler
- concentration
- water scrubber
- caustic wash
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Abstract
The invention belongs to the technical field of environmental protection, and especially relates to an optical fiber perform rod sintering tail gas processing apparatus and a method. The optical fiber perform rod sintering tail gas processing apparatus is composed of a Venturi tube deduster, a wire mesh filter, a bath tower, a wet electrostatic precipitator, a second bath tower, a second wet electrostatic precipitator, and an alkaline tower which are connected successively; the Venturi tube deduster, the bath tower, the wet electrostatic precipitator, the second bath tower, the second wet electrostatic precipitator, and the alkaline tower are connected with a first inclined tube sedimentation tank, a second inclined tube sedimentation tank, a third inclined tube sedimentation tank, a fourth inclined tube sedimentation tank, a fifth inclined tube sedimentation tank, and a sixth inclined tube sedimentation tank successively via circulating water pumps; the top of the bath tower and the top of the second bath tower are provided with demisters; a supernatant outlet of the wire mesh filter is connected with the second inclined tube sedimentation tank; and a supernatant outlet of the inclined tube sedimentation tank is connected with the Venturi tube deduster. The optical fiber perform rod sintering tail gas processing apparatus can be used for recycling SiO2 and HCl in optical fiber perform rod sintering tail gas, and can be used for processing tail gas with a relatively high concentration.
Description
Technical field
The present invention relates to environmental technology field, particularly a kind of optical wand sintering exhaust gas processing device and method.
Background technology
Optical wand sintering is taking silicon tetrachloride as raw material, and hydrogen, oxygen are supply gas, at high temperature reacts and generates orthosilicic acid and hydrogen chloride, and orthosilicic acid is sloughed two water and generated silica.The key reaction formula of optical wand sintering: SiCl
4+ 4H
2o==H
4siO
4+ 4HCl, H
4siO
4==2H
2o+SiO
2.Chinese patent discloses a kind of gas-phase silicon dioxide tail gas treatment process device for No. 201110164284.4, has and is difficult for stopping up, and by-product hydrochloric acid concentration is high, and advantage that can by-product high-purity hydrogen chloride.But before science and engineering skill, tail gas was processed through bag-type dust herein, had illustrated that this device only limits to the silica vent gas treatment of low concentration.
Summary of the invention
The invention provides a kind of optical wand sintering exhaust gas processing device, this device is for burning the SiO that separates tail gas to optical wand
2reclaim with HCl, can process the tail gas of higher concentration.
The present invention also provides a kind of method of utilizing described device to carry out optical wand sintering vent gas treatment.
The technical solution adopted for the present invention to solve the technical problems is:
A method for optical wand sintering vent gas treatment, is characterized in that comprising the following steps:
A, waste gas, through the venturi tube duster dust removal process of lowering the temperature, to reduce the dust concentration in waste gas, carry out processed by wire gauzee filter to waste gas, afterwards to reduce the processing pressure of follow-up wet static dedusting unit;
B, waste gas after a step process pass into " two-stage washing+two-stage wet static dedusting " processing unit, further HCl and the SiO in effective recycling waste gas
2, also reached the effect of purifying exhaust air simultaneously;
C, finally waste gas is passed into caustic wash tower and carry out end treatment, the waste gas after up to standard draws to aiutage high altitude discharge by blower fan;
After unified collection of waste water that d, each processing unit produce, enter tube settler and carry out concentration and recovery, the mud that tube settler produces enters concentration basin and carries out concentration, then enters plate compression processing, and the solid waste obtaining is recycled.
Technological process of the present invention is as follows: waste gas is introduced (SiO
2)--venturi cooling dedusting--dehydration--washing--demist--wet-esp--secondary washing--demist--secondary wet-esp--alkali lye spray--demist--blower fan--gas qualified discharge;----supernatant refluxes concentrated (HCl), and--mud is at concentration basin plate compression, and------SiO is reclaimed in washing--plate compression--to plate compression to precipitation to waste liquid (containing HCl) in alkali cleaning
2.
As preferably, described tube settler has 6 at least, be connected with each unit for treating water or processed unit respectively, tube settler adopts FRP material, the supernatant of tube settler returns step by step, owing to containing HCl in supernatant, refluxing step by step purifies makes HCl obtain concentration raising, finally concentrates.
As preferably, the sewage backflow between secondary tube settler, concentration basin and plate compression to wire gauzee filter reduces the concentration of the HCl of subordinate, SiO
2concentration improve.
A kind of optical wand sintering exhaust gas processing device, this device is by venturi tube duster, wire gauzee filter, water scrubber, wet cottrell, secondary water scrubber, secondary wet cottrell, caustic wash tower is connected in sequence, venturi tube duster, water scrubber, wet cottrell, secondary water scrubber, secondary wet cottrell, caustic wash tower respectively by water circulating pump successively with one-level tube settler, secondary tube settler, three grades of tube settlers, level Four tube settler, Pyatyi tube settler is connected with six grades of tube settlers, the top of water scrubber and secondary water scrubber is provided with demister, the supernatant outlet of wire gauzee filter is connected with secondary tube settler, and the supernatant outlet of secondary tube settler is connected with venturi tube duster.
As preferably, in caustic wash tower tower body, upper end is provided with demister, and the top of caustic wash tower is connected with blower fan.
As preferably, the sludge outlet of secondary tube settler, three grades of tube settlers, level Four tube settler, Pyatyi tube settler and six grades of tube settlers is connected with concentration basin respectively.
As preferably, described concentration basin, be connected with plate and frame filter press, the second caustic wash tower, secondary plate and frame filter press, the second water scrubber and three grades of plate and frame filter press in turn, concentration basin arranges respectively with plate and frame filter press the return line being connected with wire gauzee filter, between the second caustic wash tower, secondary plate and frame filter press, the second water scrubber and three grades of plate and frame filter press and caustic wash tower, return line is set respectively.
The invention has the beneficial effects as follows: this device is for burning the SiO that separates tail gas to optical wand
2reclaim with HCl, can process the tail gas of higher concentration.This device is provided with supernatant return line supernatant is carried out to step by step concentration, thereby reclaims high concentration HCl.Concentrated and the plate compression of mud is also provided with return line mud is purified, and makes the SO reclaiming
2purity improve.
Brief description of the drawings
Fig. 1 is process chart of the present invention;
Fig. 2 is the structural representation of apparatus of the present invention;
In figure: 1 venturi tube duster, 2 wire gauzee filters, 3 water scrubbers, 4 wet cottrells, 5 secondary water scrubbers, 6 secondary wet cottrells, 7 caustic wash towers, 8 blower fans, 9 concentration basins, 10 plate and frame filter press, 11 second caustic wash towers, 12 secondary plate and frame filter press, 13 second water scrubbers, 14 3 grades of plate and frame filter press, 15 one-level tube settlers, 16 secondary tube settlers, 17 3 grades of tube settlers, 18 level Four tube settlers, 19 Pyatyi tube settlers, 20 6 grades of tube settlers.
Detailed description of the invention
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.Should be appreciated that enforcement of the present invention is not limited to the following examples, any pro forma accommodation that the present invention is made and/or change all will fall into protection domain of the present invention.
In the present invention, if not refer in particular to, all part, percentages are unit of weight, and equipment and the raw material etc. adopting all can be buied from market or this area is conventional.Method in following embodiment, if no special instructions, is the conventional method of this area.
Embodiment:
The device of a kind of optical wand sintering vent gas treatment as shown in Figure 1, this device is connected in sequence by venturi tube duster 1, wire gauzee filter 2, water scrubber 3, wet cottrell 4, secondary water scrubber 5, secondary wet cottrell 6, caustic wash tower 7, in caustic wash tower tower body, upper end is provided with demister, and the top of caustic wash tower is connected with blower fan 8.Venturi tube duster, water scrubber, wet cottrell, secondary water scrubber, secondary wet cottrell, caustic wash tower are connected with six grades of tube settlers 20 with one-level tube settler 15, secondary tube settler 16, three grades of tube settlers 17, level Four tube settler 18, Pyatyi tube settlers 19 successively by water circulating pump respectively, and the top in water scrubber and secondary water scrubber tower body is provided with demister; The supernatant outlet of wire gauzee filter is connected with secondary tube settler, and the supernatant outlet of secondary tube settler is connected with venturi tube duster.
The sludge outlet of secondary tube settler, three grades of tube settlers, level Four tube settler, Pyatyi tube settler and six grades of tube settlers is connected with concentration basin 9 respectively.Described concentration basin, be connected with plate and frame filter press 10, the second caustic wash tower 11, secondary plate and frame filter press 12, the second water scrubber 13 and three grades of plate and frame filter press 14 in turn, concentration basin arranges respectively with plate and frame filter press the return line being connected with wire gauzee filter, between the second caustic wash tower, secondary plate and frame filter press, the second water scrubber and three grades of plate and frame filter press and caustic wash tower, return line is set respectively.
Sewage backflow between secondary tube settler, concentration basin and plate and frame filter press, to wire gauzee filter, reduces the concentration of the HCl of subordinate, SiO
2concentration improve.The cleaning press filtration (two-stage plate compression) repeating makes SiO
2purity higher, can effectively reclaim and in waste gas, have the composition of value and make waste gas qualified discharge.
Wet cottrell is treatment S iO
2the core visual plant of dust, wet cottrell is vertical structure.Equipment material: shell material FRP, dust collector pole material C-FRP, through the SiO of cooling tower decreasing temperature and increasing humidity
2dust enters from wet cottrell bottom air inlet, discharges from top.Trapped the SiO getting off by dust collector pole
2dust, through being arranged on the washing away of spray system water at wet cottrell top, SiO
2dust flows into the cyclic water tank of electric cleaner with current.Wet cottrell dust collector pole developed area is 2022.4 ㎡, the very rectangle that gathers dust, and with pole span 396mm, the high 5m of electrode; Be 0.334m/s by the dust-contained airflow speed of one-level wet cottrell; This device can trap particle more than 0.03 μ m, efficiency of dust collection >=93%.
The water tank of caustic wash tower is provided with one of pH meter, detects the basicity of water tank, in the time of pH value < 8, and high-order alkali groove metering pumping NaOH, in the time of pH value > 9, high-order alkali groove measuring pump stops sending NaOH.
The swash plate that tube settler usage level inclination angle is 60, the sedimentation basin that is A1 by original area is divided into n layer, and the total settlement area of current is A=n*A1*cos α, calculates theoretically its discharge capacity and has improved n*cos α doubly.The current sedimentation time of this tube settler is about 100min-200min, water capacity 20m
3.For convenience of spoil disposal, tube settler is placed on the high platform of frame.Tube settler material is manufactured with FRP, and outsourcing SS steel pipe is made frame structure, the anticorrosion rear and fiberglass coverboard strong bond of steelframe external application FRP.
The built-in one deck many-sided ball of water scrubber and caustic wash tower filler (43.96m
3), the high 3500mm of individual layer filler.DN50 many-sided ball, PP material for filler.One spray equipment is set on every layer of filler, 7 detachable spiral solid type nozzles (190L/min) are housed, layer spray flux 80m
3/ h, hydraulic load 6.3m
3/ m
2h.
Following content is to adopt apparatus of the present invention to carry out the process of exhaust-gas treatment, and process chart is shown in Fig. 2:
A, exhaust-gas treatment and HCl reclaim:
150 DEG C are mixed with SiO
2concentration 1.5g/Nm
3, HCl concentration 7g/Nm
3optical wand sintering exhaust emissions after first enter venturi tube duster 1 and lower the temperature after dedusting, gas temperature drops within the scope of 45 DEG C～55 DEG C, then entering wire gauzee filter 2 dewaters, the waste liquid part producing enters one-level tube settler 15 by water pump, and another part is returned the venturi tube duster dedusting of lowering the temperature.The supernatant of one-level tube settler 15 removes concentrated HCl.
Waste gas after wire gauzee filter 2 dehydrations enters water scrubber 3 and washes, and the waste liquid going out from water scrubber tower bottom flow enters secondary tube settler 16, and the supernatant of secondary tube settler is back to venturi tube duster.Part waste gas, after the demister demist at water scrubber top, enters wet cottrell, and the waste liquid that wet cottrell the flows out supernatant part that a part enters 17, three grades of tube settlers of three grades of tube settlers is back to water scrubber.Enter secondary water scrubber 5 from wet cottrell waste gas out.
Waste gas enters after 5 washings of secondary water scrubber, and waste gas enters the demister of tower top, and waste liquid enters level Four tube settler 18 by water pump part water at the bottom of tower, and another part water loops back secondary water scrubber.The supernatant of level Four tube settler is back to wet cottrell.Waste gas is after demister demist, and waste gas enters secondary wet cottrell 6, and waste liquid enters Pyatyi tube settler 19, and the supernatant of Pyatyi tube settler is back to secondary water scrubber.Waste gas enters the dedusting once again of secondary wet cottrell, adds quantitative water to secondary wet cottrell simultaneously, and secondary wet cottrell waste gas out enters caustic wash tower 7 and carries out alkali lye spray.
Waste gas enters caustic wash tower 7 and carries out alkali lye spray, adds alkali lye simultaneously.Waste gas enters the demister of tower top after demist, and by blower fan qualified discharge, now HCl concentration is 100mg/Nm
3(20 DEG C); Waste liquid enters six grades of tube settlers 20 by water pump part water, and another part water loops back caustic wash tower.In six grades of tube settlers, waste liquid is included sewage network discharge in.
B, liquid waste processing and SiO
2reclaim:
It is concentrated that secondary to the mud in Pyatyi tube settler enters concentration basin 9, and concentrated rear mud enters plate and frame filter press 10, and the waste reflux of concentration basin 9 and plate and frame filter press 10 is to secondary tube settler.Mud is after plate and frame filter press 10 press filtrations, mud enters the second caustic wash tower 11 and processes and supplement in time alkali lye and water, after 12 press filtrations of secondary plate and frame filter press, mud enters the second water scrubber 13 and adds water toward water scrubber simultaneously, after washing, mud enters three grades of plate and frame filter press 14, after mud plate compression, reclaims SiO
2, SiO
2concentration 60mg/Nm
3(20 DEG C).
The liquid that the second caustic wash tower 11, secondary plate and frame filter press 12, the second water scrubber 13 and three grades of plate and frame filter press 14 flow out is all back to caustic wash tower 7 and further processes.
Above-described embodiment is preferably scheme of one of the present invention, not the present invention is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (7)
1. a method for optical wand sintering vent gas treatment, is characterized in that comprising the following steps:
A, waste gas, through the venturi tube duster dust removal process of lowering the temperature, to reduce the dust concentration in waste gas, carry out processed by wire gauzee filter to waste gas afterwards;
B, waste gas after a step process pass into " two-stage washing+two-stage wet static dedusting " processing unit, further HCl and the SiO in effective recycling waste gas
2; " two-stage washing+two-stage wet static dedusting " processing unit is made up of water scrubber, wet cottrell, secondary water scrubber and secondary wet cottrell;
C, finally waste gas is passed into caustic wash tower and carry out end treatment, the waste gas after up to standard draws to aiutage high altitude discharge by blower fan;
After unified collection of waste water that d, each processing unit produce, enter tube settler and carry out concentration and recovery, the mud that tube settler produces enters concentration basin and carries out concentration, then enters plate compression processing, and the solid waste obtaining is recycled.
2. the method for optical wand sintering vent gas treatment according to claim 1, it is characterized in that: described tube settler has 6 at least, be connected with each unit for treating water or processed unit respectively, tube settler adopts FRP material, the supernatant of tube settler returns step by step, owing to containing HCl in supernatant, refluxing step by step purifies makes HCl obtain concentration raising, finally concentrates.
3. the method for optical wand sintering vent gas treatment according to claim 2, is characterized in that: the sewage backflow between secondary tube settler, concentration basin and plate compression to wire gauzee filter reduces the concentration of the HCl of subordinate, SiO
2concentration improve.
4. an optical wand sintering exhaust gas processing device, it is characterized in that: this device is by venturi tube duster, wire gauzee filter, water scrubber, wet cottrell, secondary water scrubber, secondary wet cottrell, caustic wash tower is connected in sequence, venturi tube duster, water scrubber, wet cottrell, secondary water scrubber, secondary wet cottrell, caustic wash tower respectively by water circulating pump successively with one-level tube settler, secondary tube settler, three grades of tube settlers, level Four tube settler, Pyatyi tube settler is connected with six grades of tube settlers, the top of water scrubber and secondary water scrubber is provided with demister, the supernatant outlet of wire gauzee filter is connected with secondary tube settler, and the supernatant outlet of secondary tube settler is connected with venturi tube duster.
5. optical wand sintering exhaust gas processing device according to claim 4, is characterized in that: in caustic wash tower tower body, upper end is provided with demister, and the top of caustic wash tower is connected with blower fan.
6. optical wand sintering exhaust gas processing device according to claim 4, is characterized in that: the sludge outlet of secondary tube settler, three grades of tube settlers, level Four tube settler, Pyatyi tube settler and six grades of tube settlers is connected with concentration basin respectively.
7. according to the optical wand sintering exhaust gas processing device described in claim 4 or 5 or 6, it is characterized in that: described concentration basin, be connected with plate and frame filter press, the second caustic wash tower, secondary plate and frame filter press, the second water scrubber and three grades of plate and frame filter press in turn, concentration basin arranges respectively with plate and frame filter press the return line being connected with wire gauzee filter, between the second caustic wash tower, secondary plate and frame filter press, the second water scrubber and three grades of plate and frame filter press and caustic wash tower, return line is set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061147.1A CN103933811B (en) | 2014-02-24 | 2014-02-24 | Optical wand sintering exhaust gas processing device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410061147.1A CN103933811B (en) | 2014-02-24 | 2014-02-24 | Optical wand sintering exhaust gas processing device and method |
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| Publication Number | Publication Date |
|---|---|
| CN103933811A true CN103933811A (en) | 2014-07-23 |
| CN103933811B CN103933811B (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556070A (en) * | 2014-12-26 | 2015-04-29 | 中天科技精密材料有限公司 | Method and device for recycling high-purity silica |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757148A (en) * | 2011-04-28 | 2012-10-31 | 陕西天宏硅材料有限责任公司 | System and method for processing waste gas and waste liquor in polysilicon production |
| CN202962208U (en) * | 2012-12-11 | 2013-06-05 | 中国瑞林工程技术有限公司 | High-temperature selenium-containing flue gas treatment device |
| CN103382032A (en) * | 2013-06-26 | 2013-11-06 | 内蒙古同远企业管理咨询有限责任公司 | Preparation method for trichlorosilane from silicon tetrachloride |
| CN203816429U (en) * | 2014-02-24 | 2014-09-10 | 杭州碧空环境科技有限公司 | Device for treating tail gas in sintering of polished rod |
-
2014
- 2014-02-24 CN CN201410061147.1A patent/CN103933811B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757148A (en) * | 2011-04-28 | 2012-10-31 | 陕西天宏硅材料有限责任公司 | System and method for processing waste gas and waste liquor in polysilicon production |
| CN202962208U (en) * | 2012-12-11 | 2013-06-05 | 中国瑞林工程技术有限公司 | High-temperature selenium-containing flue gas treatment device |
| CN103382032A (en) * | 2013-06-26 | 2013-11-06 | 内蒙古同远企业管理咨询有限责任公司 | Preparation method for trichlorosilane from silicon tetrachloride |
| CN203816429U (en) * | 2014-02-24 | 2014-09-10 | 杭州碧空环境科技有限公司 | Device for treating tail gas in sintering of polished rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556070A (en) * | 2014-12-26 | 2015-04-29 | 中天科技精密材料有限公司 | Method and device for recycling high-purity silica |
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| Publication number | Publication date |
|---|---|
| CN103933811B (en) | 2015-11-18 |
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Address after: Pu Yang Zhen Jian Hu Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Blue Sky Environmental Technology Co.,Ltd. Address before: Pu Yang Zhen Jian Hu Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU BIKONG ENVIRONMENT TECHNOLOGY Co.,Ltd. |