CN1872423A - Thermophoresis type cyclone separator for objects of subparticle - Google Patents
Thermophoresis type cyclone separator for objects of subparticle Download PDFInfo
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- CN1872423A CN1872423A CN 200610078082 CN200610078082A CN1872423A CN 1872423 A CN1872423 A CN 1872423A CN 200610078082 CN200610078082 CN 200610078082 CN 200610078082 A CN200610078082 A CN 200610078082A CN 1872423 A CN1872423 A CN 1872423A
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Abstract
A thermophoresis-type cyclone separator for superfine particles is composed of a thermophoresis-type cyclone separating cavity surrounded by a dual-layer wall, a dust discharging conic sleeve, a dust collecting bucket, a cooler for the external wall of said separating cavity, a heater for the internal wall of said separating cavity, and a clean air outlet tube on the top.
Description
Technical field
The invention belongs to dedusting technology field or environmental protection technical field.Specifically, be when the Dual-Phrase Distribution of Gas olid body that contains fine particle flows through the cyclone separator that has cold wall, thermophoretic effect and the centrifugal rotation effect of utilization under the temperature difference effect, make fine particle be deposited on cold wall, realize removing a kind of thermophoresis type cyclone separator for objects of subparticle in the broad particle size range.
Background technology
The common cyclone separator of extensive use is to pellet (PM contained in the air-flow
10) removal efficiency is extremely low.Fine particle in the air-flow can be under the effect of higher gas flow temperature and colder wall surface temperature difference,, and is deposited on the cold wall to moving to the temperature lower one, and this is referred to as thermophoretic effect.The thermophoresis phenomenon is the heat subject of studying in the world, and from present external experiment and theoretical study results, the thermophoresis deposition efficiency that is caused by thermophoretic effect merely in turbulent flow has only 10%～20%.The thermophoresis deposition efficiency is lower, is because thermophoretic forces is a short-range contingence, only just plays a role near the boundary layer.And studies show that, when duct length when 2m is above, the thermophoresis deposition efficiency just stops to increase.So, the also less report of seeing of the deduster that utilizes thermophoretic effect to make.Typical research is: the Byung Uk Lee of Korea S in 2002 and Sang Soo Kim are at document " New type ofimpactor with a cooled impaction plate for capturing PM
2.5And otheraerosols.Journal of Aerosol Science. (34) 957-967.2003)) ", a kind of novel impactor of capturing that cold drawing is housed has been carried out experimental study.They have utilized particle to the inertial collision of cold copper pressing plate and the effect of thermophoresis deposition simultaneously, and are coated with on the copper pressing plate with butter with the bonded particulate thing, total deposition efficiency is reached more than 50%, but this method are very complicated, are difficult to be applied to engineering reality.So, solve the inhalable particulates removing problem, must the new deduster of design.
Summary of the invention
The objective of the invention is to propose to utilize thermophoresis principle and centrifugal rotation effect to realize removing a kind of thermophoresis type cyclone separator for objects of subparticle of fine particle at the deficiencies in the prior art.
Purpose of the present invention is achieved through the following technical solutions: described thermophoresis type cyclone separator for objects of subparticle is a kind of cyclone type combination dust pelletizing system that the ring interlayer passes to cooling agent that has.The cooling agent that the ring interlayer feeds can be cooling water or cold air.The internal ring wall of ring interlayer 6 is a heat exchange walls, and heat exchange wall surrounds thermophoresis formula cyclonic separation chamber 7, and the internal ring wall lower end of ring interlayer 6 connects tapered sleeve 8, and the thin awl mouth of tapered sleeve 8 stretches in the control of dust ash bucket 9; The fixing pure qi (oxygen) outlet 3 in the upper end in cyclone separator chamber 7; Air intake valve 2 is connected by air inlet pipe and disengagement chamber 7, and heater 1 is connected on the inlet end of air intake valve 2, as the assisted heating device that produces higher gas flow temperature; Advance cooling medium pump 11 and be communicated with, to produce low wall surface temperature by the bottom that enters valve 10, pipeline and ring interlayer 6; Coolant discharge pipe picks out from the external annulus top of ring interlayer 6, and polyphone discharge valve 4 and cooler 5.
The present invention compared with prior art has following outstanding advantage and effect: thermophoresis type cyclone separator for objects of subparticle provided by the invention is to utilize thermophoresis principle and centrifugal rotation effect to remove pellet.On the basis of centrifugal rotation effect, utilize the thermophoretic effect effect again, the subparticle that comprehensively makes various particle diameters of two kinds of effectiveness reaches higher total deposition efficiency.Utilize this thermophoresis type cyclone separator for objects of subparticle plural serial stage, when air velocity was 5～25m/s, total removal efficiency reached 90%.And cost and operating cost are cheap, and it is convenient to implement, and control is simple.The cyclone separator bottom just has the dust stratification bucket.Also can pass through regularly to adopt hot water heated separator inwall, and purge separator inwall (short tube on pure qi (oxygen) outlet short tube 3 both sides promptly is used for utilizing compressed air purging separator inwall) with compressed air.The application of principle is removed in this reverse thermophoresis, can make the normal phase stable operation of equipment, dependable performance.And can under various environmental conditions, use effectively, positive effect be arranged administering the fine particle environmental pollution.Can carry out the marketization at an easy rate is applicable.
Description of drawings
Fig. 1 is a thermophoresis type cyclone separator for objects of subparticle work system schematic diagram.
Fig. 2 is the active section vertical view of thermophoresis type cyclone separator for objects of subparticle.
The specific embodiment
A kind of thermophoresis type cyclone separator for objects of subparticle that The present invention be directed to the deficiencies in the prior art and provide.
Described thermophoresis type cyclone separator for objects of subparticle be a kind of utilize that thermophoresis principle and centrifugal rotation effect develop a kind of simple in structure, removal efficiency is high, the equipment that removes fine particulates of stable performance.Below in conjunction with accompanying drawing concrete structure of the present invention, the course of work and preferred forms are described further.
Fig. 1 is a thermophoresis type cyclone separator for objects of subparticle work system schematic diagram provided by the invention.Fig. 2 position cyclone separator active section vertical view.The present invention is a kind of cyclone type combination dust pelletizing system that passes to cooling agent (cooling water or cold air) that has the ring interlayer.The internal ring wall of ring interlayer 6 is a heat exchange walls among the figure, and heat exchange wall surrounds thermophoresis formula cyclonic separation chamber 7, and the internal ring wall lower end of ring interlayer 6 connects tapered sleeve 8, and the thin awl mouth of tapered sleeve 8 stretches in the control of dust ash bucket 9; The fixing pure qi (oxygen) outlet 3 in the upper end in cyclonic separation chamber 7, air intake valve 2 is connected by the inwall of air inlet pipe and ring interlayer 6, and heater 1 is connected on the inlet end of air intake valve 2, as the assisted heating device that produces higher gas flow temperature; Advance cooling medium pump 11 and be communicated with, to produce low wall surface temperature by entering valve 10, pipeline and ring interlayer 6 bottoms; Coolant discharge pipe picks out from the external annulus top of ring interlayer 6, and polyphone discharge valve 4 and cooler 5.
Above-mentioned heat exchange wall surrounds thermophoresis formula cyclonic separation chamber 7 (active sections).General barrel diameter is between 40mm～200mm; Cylindrical shell and cone total height are 120mm～1500mm, and cylindrical shell can be shorter than the cone height slightly; Ash discharging hole diameter 10mm～140mm; Pure qi (oxygen) outlet diameter is 16mm～140mm; Entrance height 24mm～130mm; Throat width 8mm～60mm.Thermophoresis formula cyclone separator active section can be improved making with reference to general cyclone separator size.This system can be installed in any outside place and meet the interior space of the size of system requirements.Can also according to basic principle of the present invention, can produce the thermophoresis type cyclone separator for objects of subparticle equipment of water-cooled and air cooling all types ofs size according to the situation of the interior space and the situation of other system.With regard to Fig. 1, non high temperature gas grain mixture is through behind the auxiliary heater 1, from separator active section tangent to periphery direction, enter in thermophoresis formula cyclone separator disengagement chamber 7 (active sections), High Temperature Gas grain mixture centrifugal rotation in disengagement chamber about 200 ℃, wherein relatively large particle can separate near internal face under centrifugal rotation effect effect; On the other hand,, under water-cooling wall or air cooling (can use liquid nitrogen, carbon dioxide or other refrigerant gas) wall action of thermal difference, be deposited on the tube wall face than small-particle according to the thermophoresis rule.
Cleaners such as present cyclone separator are to pellet PM
10Removal efficiency very low, but greater than the particulate of 10 μ m certain removal efficiency is arranged for particle diameter, be generally used for the grit of particle separation diameter, and increase and efficient increases with particle diameter greater than 10 μ m.In the experiment, the thermophoresis deposition efficiency that is caused by thermophoretic effect merely in turbulent flow has 10%～20% both at home and abroad.Consider all kinds of particles that contain the particle size range broad in the grit of discharges such as power plant, consider and improve fine grain total deposition efficiency, can adopt multi-level series connection.By multi-level series connection, constantly produce non-fully developed stream effect at several swimming formula cyclone separator active sections, total deposition efficiency is constantly gone forward one by one, thereby improve.General wall-cooling surface temperature takes from about about 20 ℃ of coolant-temperature gage, and gas flow temperature generally need be more than 100 ℃.
Auxiliary heater of the present invention mainly is to improve temperature of incoming flow.To possessing the dust-contained airflow that higher temperature is arranged,, then can omit this link as boiler smoke, kiln gas etc.Auxiliary heater can substitute with the electric heater on the open market.
Cool stream and dust-contained airflow divide following current and two kinds of forms of adverse current by the mode of action, are good with adverse current.Two kinds of forms of this device can be different environments for use and condition realizes removing efficiently the interior fine particulates of broad particle size range.
The thermophoresis formula cyclone body ring set interlayer both ends of the surface of this equipment are made by steel plate with holes, with the welding of separator lower shell, two cylindrical shells are also sealed with one heart form annular end face, separator interlayer ectosome welding limbers.Cooling water can be taken from all kinds of normal temperature water source, and can recycle repeatedly.The number of multi-level series connection will be determined according to temperature difference and Reynolds number, generally be advisable with about 10.The connection of pipe-line system will be prevented sealing, gas leakage.
The short tube (also can consider 4 or many layouts) of band valve 12,13 is housed in the thermophoresis formula cyclone body upper surface of this equipment, closing turnover two-way main valve, after opening two branch road valves 12,13, in order to feed compressed air, regularly purge the fine particulates of deposition, and at the terminal dust-exhausting port of air-flow place's connection cloth bag or other container, to collect fine particulates.If heated cooling water when there is hot water supply in system or utilizes work can feed hot water from cooling water hole, utilize colder compressed air by sandwich passage simultaneously, utilize the effect of thermophoresis equally, all kinds of particle high efficiency are blown into cloth bag collect.Certainly, system also can use each kind solvent such as water to clean easily.
Claims (1)
1. thermophoresis type cyclone separator for objects of subparticle, it is characterized in that, described thermophoresis type cyclone separator for objects of subparticle is a kind of cyclone type combination dust pelletizing system that has the ring interlayer of coolant, and having heaters (1) heats temperature of incoming flow, there is cooler (5) to cool off through the cooling agent after the heat exchange, the internal ring wall of ring interlayer (6) is a heat exchange walls, heat exchange wall surrounds thermophoresis formula cyclonic separation chamber (7), the internal ring wall lower end of ring interlayer (6) connects tapered sleeve (8), and the thin awl mouth of tapered sleeve (8) stretches in the control of dust ash bucket (9); The fixing pure qi (oxygen) outlet (3) in the upper end of cyclonic separation chamber (7), air intake valve (2) is connected by air inlet pipe and ring interlayer (6), and heater (1) is connected on the inlet end of air intake valve (2), as the assisted heating device that produces higher gas flow temperature; Advance cooling medium pump (11) and be communicated with, to produce low wall surface temperature by entering valve (10), pipeline and ring interlayer (6) bottom; Coolant discharge pipe picks out from the external annulus top of ring interlayer (6), and polyphone dump valve (4) and cooler (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610078082 CN1872423A (en) | 2006-05-09 | 2006-05-09 | Thermophoresis type cyclone separator for objects of subparticle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610078082 CN1872423A (en) | 2006-05-09 | 2006-05-09 | Thermophoresis type cyclone separator for objects of subparticle |
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| CN1872423A true CN1872423A (en) | 2006-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511223A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Calcium carbide furnace tail gas purification system |
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2006
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104511223A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Calcium carbide furnace tail gas purification system |
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