CN103949118B - A kind of CVI furnace exhaust gas treating apparatus - Google Patents
A kind of CVI furnace exhaust gas treating apparatus Download PDFInfo
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- CN103949118B CN103949118B CN201410211473.6A CN201410211473A CN103949118B CN 103949118 B CN103949118 B CN 103949118B CN 201410211473 A CN201410211473 A CN 201410211473A CN 103949118 B CN103949118 B CN 103949118B
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Abstract
A kind of CVI furnace exhaust gas treating apparatus, in the insertion kuppe of exhaust tube, the bottom external peripheral surface in kuppe is provided with flow-guide fan, is circumferentially fixed with multiple guide vane at flow-guide fan.Separation cone is positioned at below described exhaust tube.Exhaust tube, kuppe and separation cone are coaxial.Air inlet pipe is positioned at the neck place under kuppe outward flange dish, and through with kuppe.High pressure gas jet pipe is positioned at air inlet pipe one side surface and closes on kuppe neck place.The present invention is directed in CVI furnace exhaust gas the multi-phase complex component being rich in solid phase, liquid phase, condensated gas and not condensated gas, the centrifugal sieving actoion of eddying motion is utilized the high density objectionable impurities in tail gas to be thrown to cylindrical region in kuppe, and the center extraction port area of the clean gas that the bottom density of impurity sedimentation in kuppe is lower the most at last then in enrichment and kuppe is extracted out by exhaust tube, be a kind ofly can to run continuously for a long time, CVI furnace exhaust gas treating apparatus that purification efficiency is high.
Description
Technical field
The present invention relates to a kind of CVI stove of C/C composite, specifically exhaust gas processing device in CVI stove.
Background technology
CVI legal system is in C/C composite material, need to extract out outside stove by the vacuum evacuation system of CVI stove containing a large amount of tar, carbon black, coke granule, carbon fiber, the carbon-source gas that can coagulate the heterogeneous impurity such as large molecule and non-complete reaction, these impurity enter the meeting of vacuum evacuation system severe contamination, blocking pipeline, the valve damaged on it, prosecution equipment, the vavuum pump etc. of CVI stove, have a strong impact on the lasting reliability service of CVI stove.
In order to pollution abatement thing is to the adverse effect of CVI stove, Baimtec Material Co., Ltd is disclose in the utility model patent of 201120435175.7 " a kind of chemical vapour deposition (CVD) exhaust gas processing device " in the patent No., the process that this device utilizes two-stage to cool and the mode of three-stage filtration realizes objectionable impurities in CVI stove, serve certain purified treatment effect, but owing to having silk screen filter tank and activated carbon filtration tank in this device, device is after operation a period of time, silk screen filter tank and activated carbon filtration tank very easily block, furnace gas is caused to extract out smoothly, continuous operational effect is not ideal enough.
Xi'an Electric Furnace Institute Co., Ltd. is disclose in the innovation and creation of 201110356140.9 " a kind of gas phase CVI stove three-level filter system " at application number, this device employing cold plate condensation adsorption adds filter bag, the mode of active carbon double-filtration realizes clean-up effect, owing to polluting fast after cold plate condensation adsorption impurity in device, condensation efficiency sharply reduces, filter bag, active carbon filtering device also easily block in addition, also have impact on this filter and run continuously.
Summary of the invention
For overcome exist in prior art easy blocking, affect the deficiency that CVI stove runs continuously, the present invention proposes a kind of CVI furnace exhaust gas treating apparatus.
The present invention includes exhaust tube, kuppe, flow-guide fan, nut, separation cone, base plate, air inlet pipe and high pressure gas jet pipe.Wherein, one end of exhaust tube to be inserted from center, kuppe top in this kuppe and is connected, the bottom external peripheral surface being positioned at kuppe at described exhaust tube is provided with flow-guide fan, is circumferentially fixed with multiple guide vane, for air-guiding direction at described flow-guide fan.Separation cone is positioned at below described exhaust tube, and the top of this separation cone is 5 ~ 20mm apart from the distance between this exhaust tube lower surface.Described separation cone is inserted into the plate upper surface of kuppe by pole.Lower end and the base plate of described kuppe pass through Flange joint.Exhaust tube, kuppe and separation cone are coaxial.The maximum gauge of described separation cone: the maximum inner diameter=0.4 ~ 0.7:1 of water conservancy diversion axle; The facies basialis pyramidis diameter of separation cone: cone height=3 ~ 8:1.Air inlet pipe is positioned at the neck place under kuppe outward flange dish, and through with kuppe.The inner surface of described air inlet pipe side tube wall and this kuppe tube wall is tangent, the extension line of the opposite side tube wall of air inlet pipe and the outer surface of tube wall of exhaust tube tangent.Angle between described air inlet pipe upper surface and kuppe outer surface is 75 ~ 87 degree.Described high pressure gas jet pipe is positioned at air inlet pipe one side surface and closes on kuppe neck place, one end and this air inlet pipe through, the other end is communicated with high-pressure air source.
The outer surface on described exhaust tube top has flange, and have the radial limiting stand protruded at the outer surface of this exhaust tube bottom, for limiting the installation site of flow-guide fan, and the lower surface of this exhaust tube is concordant with the lower surface of diversion section in kuppe.
Described kuppe is revolving body, and this kuppe comprises cover body and flange.The upper end of cover body is the neck of this kuppe, and lower end is settlement barrel, and described neck and settlement barrel are isometrical cylindrical shell, and neck: settlement barrel=0.2 ~ 0.4:1.Be diversion section between described neck and settlement barrel, the axial height of this diversion section is 0.2 ~ 0.4 times of settlement barrel internal diameter; Described diversion section is taper.
Flow-guide fan comprises adapter sleeve and guide vane.The internal diameter of described adapter sleeve is identical with the external diameter of exhaust tube.Guide vane has 3 ~ 20, uniform and be welded on the external peripheral surface of adapter sleeve.Guide vane is plane blade, and the established angle on adapter sleeve is 5 ~ 20 degree.Distance between the end face of guide vane blade tip end and kuppe inner surface is 5 ~ 20mm.
The present invention is directed to the problem that the continuous maneuverability of existing exhaust gas processing device is poor, purification efficiency is low, propose a kind of CVI furnace exhaust gas treating apparatus.For be rich in CVI furnace exhaust gas solid phase, liquid phase, condensated gas, not condensated gas, etc. multi-phase complex component, wherein harmful solid phase, liquid phase, the feature that condensated gas density is higher, utilize the centrifugal sieving actoion of eddying motion the high density objectionable impurities in tail gas to be thrown to cylindrical region in kuppe, and the center extraction port area of the clean gas that the bottom density of impurity sedimentation in kuppe is lower the most at last then in enrichment and kuppe is extracted out by exhaust tube.
Target tail gas enters this device through air inlet pipe under the effect of this device internal negative pressure.Under the induced effect of the supersonic airstream that the object gas of access to plant sprays at high pressure gas jet pipe, flow velocity increases sharply 20 ~ 30 times.The mixed airflow that object gas and supersonic gas are formed changes through the action direction of flow-guide fan generation screw after importing kuppe at a certain angle.The centrifugal action produced when utilizing flow spiral to move in this process has carried out sieving purification to object gas.Through the object gas of preliminary screening be enriched in cylindrical in kuppe and constantly and wall collide absorption and realize adsorbing separation effect.Because gas first separation is difficult to reach the effect be thoroughly separated, in order to realize the repeatedly multi-cycle separation to object gas, in the present invention, utilize the narrow annular passage formed between separation cone and exhaust tube, flow spiral motion in stiffening device, utilizes the brim of a hat type structure of separation cone that the gas barrier being rich in impurity is done repetition screw below the brim of a hat to carry out repeatedly repeated isolation thus to reach the effect improving isolation of purified degree.The impurity be rich in the object gas of impurity through separating for several times is attached to the inner surface of kuppe and the surface of flow-guide fan and separation cone substantially, and the clean gas after separation is sucked out discharge through bleeding point.The impurity be attached on the inner surface of kuppe and the surface of flow-guide fan and separation cone labor cleaning can be got rid of when overhauling.
The present invention be a kind ofly can to run continuously for a long time, CVI furnace exhaust gas treating apparatus that purification efficiency is high, concrete manifestation in the following areas:
The present invention makes full use of the centrifugation of screw, spiral increases journey and sedimentation theory achieves efficient separation and collection to tail gas.
The design of the decanting zone in the kuppe adopted below separation cone improves the trapping effect to impurity in tail gas.
Add air-flow flow distance and time in device by flow spiral motion, improve separating effect.
Reduce bleeding point size by separation cone, accelerate bleeding point gas flow rate and spiral separation effect.
By the brim of a hat isolation of separation cone, the objectionable impurities sieved out is isolated in outside bleeding point.
And the high velocity air utilizing gas ejector to spray drives tail gas to do high-speed screw motion, improves separating effect.
The present invention adopts without mesh filter, does not block, and continuous operational effect is good.And movement-less part, device reliability is high.
Accompanying drawing explanation
Fig. 1 is sectional view such as axle such as grade of the present invention;
Fig. 2 is sectional view of the present invention;
Fig. 3 is the axis side view such as grade of exhaust tube;
Fig. 4 is the top view of flow-guide fan;
Fig. 5 is the front view of flow-guide fan;
Fig. 6 is the sectional view of separation cone;
Fig. 7 is the axis side view such as grade of base plate;
Fig. 8 runs schematic diagram;
Fig. 9 is the top view of Fig. 8.
In figure:
1. exhaust tube; 2. kuppe; 3. flow-guide fan; 4. nut; 5. separation cone; 6. base plate; 7. air inlet pipe; 8. high pressure gas jet pipe; 9. limiting stand; 10. guide vane; 11. poles; 12. sockets; 13. cones.
Detailed description of the invention
The present embodiment is the problem poor for the continuous maneuverability of existing exhaust gas processing device, purification efficiency is low, proposes a kind of CVI furnace exhaust gas treating apparatus.
The present embodiment comprises exhaust tube 1, kuppe 2, flow-guide fan 3, nut 4, separation cone 5, base plate 6, air inlet pipe 7, high pressure gas jet pipe 8.Wherein, one end of exhaust tube 1 to be inserted from center, kuppe 2 top in this kuppe and is connected by flange, the bottom external peripheral surface being positioned at kuppe at described exhaust tube is provided with flow-guide fan 3 and is locked by nut 4, multiple guide vane 10 is circumferentially welded with, for air-guiding direction at described flow-guide fan.Separation cone 5 is positioned at below described exhaust tube 1, and the top of this separation cone is 5 ~ 20mm apart from the distance between this exhaust tube lower surface.Described separation cone is inserted into base plate 6 upper surface of kuppe by pole 11.Lower end and the base plate 6 of described kuppe pass through Flange joint.Exhaust tube 1, kuppe 2 and separation cone 5 are coaxial.The maximum gauge of described separation cone 5: the maximum inner diameter=0.4 ~ 0.7:1 of water conservancy diversion axle; The facies basialis pyramidis diameter of separation cone 5: cone height=3 ~ 8:1.In the present embodiment, the top of described separation cone is 8mm apart from the distance between this exhaust tube lower surface, the maximum gauge of described separation cone 5: the maximum inner diameter=0.6:1 of water conservancy diversion axle; The facies basialis pyramidis diameter of separation cone 5: cone height=6:1.Air inlet pipe 7 is positioned at the neck place under kuppe 2 outward flange dish, and through with kuppe 2.Position between described air inlet pipe 7 and kuppe 2 makes the inner surface of this air inlet pipe 7 side tube wall and this kuppe 2 tube wall tangent, the extension line of the opposite side tube wall of described air inlet pipe 7 and the outer surface of tube wall of exhaust tube 1 tangent.Angle between described air inlet pipe upper surface and kuppe 2 outer surface is 75 ~ 87 degree, and the angle namely between the center line in intake manifold length direction and the axis of kuppe 2 is 75 ~ 87 degree.Described high pressure gas jet pipe 8 is positioned at air inlet pipe 7 one side surface and closes on kuppe neck place, one end and this air inlet pipe through, the other end is communicated with high-pressure air source, imports in kuppe by this high pressure gas jet pipe by gases at high pressure, to realize acceleration suction being entered to the gas in kuppe.
Described exhaust tube 1 is revolving body, flange is had at the outer surface on this exhaust tube top, have the radial limiting stand protruded at the outer surface of this exhaust tube bottom, for limiting the installation site of flow-guide fan, and the lower surface of this exhaust tube is concordant with the lower surface of diversion section in kuppe.
Described kuppe 2 is revolving body, and this kuppe 2 comprises cover body and flange.The upper end of cover body is the neck of this kuppe, and lower end is settlement barrel, and described neck and settlement barrel are isometrical cylindrical shell, and neck: settlement barrel=0.2 ~ 0.4:1.Be diversion section between described neck and settlement barrel, the axial height of this diversion section is 0.2 ~ 0.4 times of settlement barrel internal diameter; Described diversion section is taper.In the present embodiment, the neck of kuppe 2: settlement barrel=0.3:1, the axial height of diversion section is 0.3 times of settlement barrel internal diameter.
Flow-guide fan 3 comprises adapter sleeve and guide vane.The internal diameter of described adapter sleeve is identical with the external diameter of exhaust tube.Guide vane has 3 ~ 20, uniform and be welded on the external peripheral surface of adapter sleeve.Guide vane is plane blade, and the established angle on adapter sleeve is 5 ~ 20 degree.Distance between the end face of guide vane blade tip end and kuppe inner surface is 5 ~ 20mm.In the present embodiment, guide vane has 12, and the established angle of lid guide vane is 10 degree, and the distance between the end face of guide vane blade tip end and kuppe inner surface is 5mm.
The cross section of described air inlet pipe 7 is square.The tube wall closing on kuppe one end in this air inlet pipe there is the installing hole of high-pressure nozzle, have flange at the end face of this air inlet pipe other end.
Separation cone 5 comprises pole 11 and cone 13.Pole 11 is positioned at cone 13 lower surface center, inserts in the sleeve-shaped socket 12 of base plate 6 upper surface.
Described base plate 6 is circular slab, and centre of surface has the sleeve-shaped socket 12 of protrusion on which floor plate; The diameter of this base plate is identical with the external diameter of end flanges under kuppe.
During use, the mouth of pipe on exhaust tube 2 top is connected with vavuum pump, and air inlet pipe 7 is connected with chemical vapor deposition stove gas outlet, and the import of high pressure gas jet pipe 8 is connected with elevated pressure nitrogen tracheae.The tail gas being rich in solid phase, liquid phase, condensated gas and not condensated gas multi-phase complex component produced by chemical vapor deposition stove by air inlet pipe 7 is imported in kuppe 2, the tail gas of supersonic airstream to described importing simultaneously sprayed by high pressure gas jet pipe 8 is accelerated, tail gas after acceleration is moved in the same way along the tangential direction of this annular region in an annular region, and described annular region formed by the outer wall of kuppe inwall with the exhaust tube being positioned at kuppe.
In the rotation of tail gas after described acceleration in kuppe, constantly keep tail gas to flow in the tangential direction of annular region by the guide effect of flow-guide fan blade, and continue to produce centrifugal force.This centrifugal force is utilized to be separated by the high density objectionable impurities in tail gas and be settled down to the bottom in kuppe, and the spacing by keeping between separation cone poppet surface and exhaust tube, accelerate bleeding point gas flow rate and spiral separation effect.Tail gas is after being separated, and obtain the clean gas that density is lower, this clean gas is extracted out by exhaust tube.
Claims (2)
1. a CVI furnace exhaust gas treating apparatus, is characterized in that, comprises exhaust tube, kuppe, flow-guide fan, nut, separation cone, base plate, air inlet pipe and high pressure gas jet pipe; Wherein, one end of exhaust tube to be inserted from center, kuppe top in this kuppe and is connected, the bottom external peripheral surface being positioned at kuppe at described exhaust tube is provided with flow-guide fan, is circumferentially fixed with multiple guide vane, for air-guiding direction at described flow-guide fan; Separation cone is positioned at below described exhaust tube, and the top of this separation cone is 5 ~ 20mm apart from the distance between this exhaust tube lower surface; Described separation cone is inserted into the plate upper surface of kuppe by pole; Lower end and the base plate of described kuppe pass through Flange joint; Exhaust tube, kuppe and separation cone are coaxial; The maximum gauge of described separation cone: the maximum inner diameter=0.4 ~ 0.7:1 of kuppe; The facies basialis pyramidis diameter of separation cone: cone height=3 ~ 8:1; Air inlet pipe is positioned at the neck place under kuppe outward flange dish, and through with kuppe; The inner surface of described air inlet pipe side tube wall and this kuppe tube wall is tangent, the extension line of the opposite side tube wall of air inlet pipe and the outer surface of tube wall of exhaust tube tangent; Angle between described air inlet pipe upper surface and kuppe outer surface is 75 ~ 87 degree; Described high pressure gas jet pipe is positioned at air inlet pipe one side surface and closes on kuppe neck place, one end and this air inlet pipe through, the other end is communicated with high-pressure air source;
Described kuppe is revolving body, and this kuppe comprises cover body and flange; The upper end of cover body is the neck of this kuppe, and lower end is settlement barrel, and described neck and settlement barrel are isometrical cylindrical shell, and neck: settlement barrel=0.2 ~ 0.4:1; Be diversion section between described neck and settlement barrel, the axial height of this diversion section is 0.2 ~ 0.4 times of settlement barrel internal diameter; Described diversion section is taper;
Described flow-guide fan comprises adapter sleeve and guide vane; The internal diameter of described adapter sleeve is identical with the external diameter of exhaust tube; Guide vane has 3 ~ 20, uniform and be welded on the external peripheral surface of adapter sleeve; Guide vane is plane blade, and the established angle on adapter sleeve is 5 ~ 20 degree; Distance between the end face of guide vane blade tip end and kuppe inner surface is 5 ~ 20mm.
2. CVI furnace exhaust gas treating apparatus as claimed in claim 1, it is characterized in that, the outer surface on described exhaust tube top has flange, the radial limiting stand protruded is had at the outer surface of this exhaust tube bottom, for limiting the installation site of flow-guide fan, and the lower surface of this exhaust tube is concordant with the lower surface of diversion section in kuppe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410211473.6A CN103949118B (en) | 2014-05-19 | 2014-05-19 | A kind of CVI furnace exhaust gas treating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410211473.6A CN103949118B (en) | 2014-05-19 | 2014-05-19 | A kind of CVI furnace exhaust gas treating apparatus |
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| CN103949118A CN103949118A (en) | 2014-07-30 |
| CN103949118B true CN103949118B (en) | 2016-02-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2355771Y (en) * | 1998-12-18 | 1999-12-29 | 周明连 | Centrifugal purifier |
| CN101077471A (en) * | 2007-06-28 | 2007-11-28 | 陈锦霖 | Oil fume secondary purifier |
| CN101790588A (en) * | 2007-08-29 | 2010-07-28 | 保尔伍斯股份有限公司 | Dust-catcher for blast furnace gas |
| CN202270430U (en) * | 2011-09-16 | 2012-06-13 | 固耐重工（苏州）有限公司 | Gas-liquid separator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009262027A (en) * | 2008-04-23 | 2009-11-12 | Calsonic Kansei Corp | Gas-liquid separator |
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2014
- 2014-05-19 CN CN201410211473.6A patent/CN103949118B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2355771Y (en) * | 1998-12-18 | 1999-12-29 | 周明连 | Centrifugal purifier |
| CN101077471A (en) * | 2007-06-28 | 2007-11-28 | 陈锦霖 | Oil fume secondary purifier |
| CN101790588A (en) * | 2007-08-29 | 2010-07-28 | 保尔伍斯股份有限公司 | Dust-catcher for blast furnace gas |
| CN202270430U (en) * | 2011-09-16 | 2012-06-13 | 固耐重工（苏州）有限公司 | Gas-liquid separator |
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