CN103418151B - A kind of distilling apparatus - Google Patents
A kind of distilling apparatus Download PDFInfo
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- CN103418151B CN103418151B CN201310360535.5A CN201310360535A CN103418151B CN 103418151 B CN103418151 B CN 103418151B CN 201310360535 A CN201310360535 A CN 201310360535A CN 103418151 B CN103418151 B CN 103418151B
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- sieve plate
- tower body
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- flow tube
- downflow weir
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Abstract
The embodiment of the invention discloses a kind of distilling apparatus, including tower body, steam outlet pipe it is disposed with from top to bottom on described tower body, feed pipe and discharge nozzle, described tower body inwall is provided with at least two-layer sieve plate, at least one downflow weir it is provided with on every layer of sieve plate, also bottom described tower body, it is provided with at least one fall flow tube on every layer of sieve plate, one end of each fall flow tube connects with the downflow weir on its place sieve plate, the other end of the fall flow tube on last layer sieve plate stretches on next layer of sieve plate in the downflow weir of correspondence position, each downflow weir at most connects with a fall flow tube, multiple sieve aperture for steam circulation is offered on described sieve plate, and the multiple pilot hole for guiding to steam.
Description
Technical field
The present invention relates to chemical field, particularly relate to a kind of distilling apparatus.
Background technology
At present, in conventional distil-lation device, sieve plate only offers the passage of multiple certain diameter, boric acid
When solution flows on sieve plate, easily form " backflow " and " eddy flow ", cause plate efficiency relatively low.It addition,
The distillation target of the dilute boric acid solution in nuclear power station boric acid recovery system is higher, and distillate needs boron concentration to reach
Below 5ppm, existing boric acid solution distilling apparatus is difficulty with this target.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, for prior art mesoboric acid solution distillation dress
Put plate efficiency and the relatively low defect of separating degree, it is provided that a kind of high efficiency, the distilling apparatus of high separation.
In order to solve above-mentioned technical problem, embodiments provide a kind of distilling apparatus, including tower body,
Steam outlet pipe, feed pipe and discharge nozzle it is disposed with from top to bottom, on described tower body inwall on described tower body
Be provided with at least two-layer sieve plate, every layer of sieve plate be provided with at least one downflow weir, on every layer of sieve plate also towards
At least one fall flow tube, one end of each fall flow tube and on its place sieve plate it is provided with bottom described tower body
Downflow weir connects, and the other end of the fall flow tube on last layer sieve plate stretches into the excessive of correspondence position on next layer of sieve plate
In stream weir, each downflow weir at most connects with a fall flow tube, described sieve plate offers multiple for steam
The sieve aperture of circulation and multiple pilot hole for guiding to steam, the rising overflowed in described pilot hole is steamed
Vapour promotes the liquid phase feed liquid on sieve plate to move to the fall flow tube place effluent of this layer of sieve plate.
In distilling apparatus of the present invention, the position of the downflow weir on every layer of sieve plate is the most identical, described fall
Flow tube is straight pipeline.
In distilling apparatus of the present invention, every layer of sieve plate is provided with a fall flow tube and two downflow weirs,
Said two downflow weir is oppositely arranged.
In distilling apparatus of the present invention, described tower body is additionally provided with return duct, described return duct ratio
Described sieve plate is closer to described tower body top.
In distilling apparatus of the present invention, overflowing near the close return duct on the sieve plate at tower body top
Stream weir connects with described return duct, and another downflow weir on described sieve plate connects with the fall flow tube of described sieve plate.
In distilling apparatus of the present invention, described downflow weir is close to described tower body inwall.
In distilling apparatus of the present invention, described pilot hole includes pilot hole opening and from pilot hole opening
The prerotation vane that extends obliquely of side, the direction that described prerotation vane extends and boric acid solution stream on described sieve plate
Dynamic direction is identical.
In distilling apparatus of the present invention, in described tower body, bottom described tower body, place is additionally provided with anti-
Whirlpool plate, described vortex shield and described discharge nozzle clamping.
In distilling apparatus of the present invention, in described tower body, it is additionally provided with wire mesh demister, described silk screen
Demister than described sieve plate closer to described tower body top.
In distilling apparatus of the present invention, the inwall of described tower body is provided with bracing ring, described sieve plate
It is connected with described bracing ring by connector.
Implement the embodiment of the present invention, have the advantages that by offering pilot hole on sieve plate, make
Rise steam and the liquid phase feed liquid on sieve plate is produced impetus forward, make liquid phase feed liquid directed flow form piston
Stream, it is to avoid liquid produces " backflow ", " eddy flow " in column plate, can improve production capacity and plate efficiency；Logical
Cross downflow weir and the fall flow tube that multiple sieve plate and correspondence are set, the separating degree of solute and water can be improved.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the distilling apparatus that the preferred embodiment of the present invention provides；
Fig. 2 is the side view of the downflow weir in distilling apparatus shown in Fig. 1；
Fig. 3 is the top view of the downflow weir in distilling apparatus shown in Fig. 1；
Fig. 4 is the side sectional view of the fall flow tube in distilling apparatus shown in Fig. 1；
Fig. 5 is the top view of the fall flow tube in distilling apparatus shown in Fig. 1；
Fig. 6 is the side view of the sieve plate in distilling apparatus shown in Fig. 1；
Fig. 7 is the top view of the sieve plate in distilling apparatus shown in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
The distilling apparatus that the present invention provides includes tower body, and tower body can be divided into several part, so can so that
The installation of tower body internal components and maintenance.Such as, the tower body shown in Fig. 1 is divided into tower top cover, tower from top to bottom
Body wall and three parts of tower chassis, be connected with each other by flange 4 between these three part.
Steam outlet pipe 9, feed pipe 3 and discharge nozzle 1 it is disposed with from top to bottom on tower body.Due to surplus after distillation
Remaining concentration solution collects in bottom tower body, is therefore generally located at bottom tower body by discharge nozzle 1, the most permissible
It is easy to concentrate solution flow out.Steam outlet pipe 9 is generally located on tower body top, the steaming after so can conveniently distilling
Steam flow goes out.Feed pipe 3 can be arranged on tower body arbitrarily higher than the position of discharge nozzle 1, certainly, feed pipe 3
Preferably exceed discharge nozzle 1 one segment distance, to avoid the need for ceaselessly discharging concentration solution.If feed pipe 3
Position is positioned at sieve plate 5 once, as it is shown in figure 1, steam outlet pipe 9 is arranged on tower top cover, and discharge nozzle 1 and entering
Material pipe 3 may be contained within tower chassis, at this moment, is preferably positioned at the position on sieve plate 5 on tower body and arranges back
Flow tube 8, such as, be positioned at the position on sieve plate 5 on tower body wall and arrange return duct 8, as such, it is possible to make tower
Internal upflowing vapor forms mass transfer through the liquid phase feed liquid on sieve plate 5.Mass transfer is owing to material is dense in system
Spend mass transfer process that is uneven and that occur.System moves from trend maximum due to entropy, i.e. tends to all
Even, if each several part non-uniform temperature, a mean temperature can be tended to, if uneven concentration, also can become
To a mean concentration.Mass transfer can make upflowing vapor mesoboric acid tend to liquid phase diffusion so that upflowing vapor
Boronic acid containing concentration is lower.As it is shown in figure 1, return duct 8 be arranged on connect tower top cover and tower body wall flange it
Under, it is a right-angle elbow pipe, enters in tower in downflow weir for backflow.
At least two-layer sieve plate 5 it is provided with on tower body inwall.Preferably, tower body inwall is additionally provided with bracing ring,
Sieve plate 5 is connected with bracing ring by connector.
Be provided with at least one downflow weir 7 on every layer of sieve plate 5, on every layer of sieve plate 5 also towards bottom tower body (i.e.
It is provided with downwards) at least one fall flow tube 6.Downflow weir 7 can form the fluid-tight of certain pressure with downspout 6,
After the full downflow weir 7 of liquid phase feed liquid collection, meeting overflow is to sieve plate 5.Downflow weir 7 is that on sieve plate 5, liquid phase feed liquid is overflowed
Structure, has the effect maintaining liquid layer on plate and making liquid phase feed liquid uniformly overflow.As shown in Figures 2 and 3, overflow
Stream weir 7 be mostly set to chord-type weir, general weir length can be taken as 0.6～0.8 times of tower diameter, the height on weir according to
Depending on different templates and liquid load.For making gas-liquid two-phase be sufficiently mixed, downflow weir to be borrowed dimension on sieve plate
Holding certain supernatant layer (when assuming not contain gas phase in liquid layer), supernatant layer increases, and the two-phase mixtures body of formation is also
Increasing, time of contact is the most corresponding to contact area to increase, and mass transfer is more abundant；But gas is by liquid layer
Pressure drop increases the most accordingly, and leakage probability also can increase.Clear liquid layer height is equal to height of weir and weir supernatant layer height
Sum, then responsibility depends on weir length and fluid flow.Decline liquid stream all to pass through above weir, to one
Determining weir long, liquid stream increases, and weir supernatant layer height increases；To certain flow quantity, the bigger then weir supernatant of weir length
Height of liquid layer is the least, and Gu Yan length is also called overflow periphery.As liquid measure is the least, optional profile of tooth weir, profile of tooth weir
Actual overflow periphery can change within the specific limits with liquid measure.Downspout is to pass through between sieve plate for liquid in tower
Passage, also there is the effect of axial mixing in gas phase separating bubble, reducing between plate, it is therefore desirable to keep liquid to exist
There is certain time of staying in downspout, typically require that volume is no less than the fluid flow volume of 3～5ml, liquid
When measuring the biggest, this value can be slightly below.Clear liquid floor height (owing to pressure balance causes) in pipe, less than whole
The 40%～60% of downspout height, in order to avoid causing liquid flooding.
One end of each fall flow tube 6 connects with the downflow weir 7 on its place sieve plate 5, last layer sieve plate 5
On the other end of fall flow tube 6 stretch in the downflow weir 7 of correspondence position on next layer of sieve plate 5, each overflow
Weir 7 at most connects with a fall flow tube 6.Generally, between fall flow tube 6 and sieve plate 5 by welding manner or
Bolt connecting mode is connected with each other.The liquid phase feed liquid of upper strata sieve plate can be by under the downspout on this layer of sieve plate
Let out in the downflow weir of the correspondence position to lower floor's sieve plate.Multiple downflow weir 7 can be provided with on one layer of sieve plate 5
With multiple fall flow tube 6, the fall flow tube 6 of last layer sieve plate 5 all stretch out to next layer and with on next layer of sieve plate 5
The downflow weir 7 of correspondence position connects, and in order to liquid phase feed liquid can flow on sieve plate 5, each downflow weir 7 is only
Connect with a fall flow tube 6, say, that the fall flow tube on adjacent two layers sieve plate 5 staggers setting.
Preferably, in order to reduce making manufacture difficulty, as it is shown in figure 1, the position of the downflow weir 7 on every layer of sieve plate 5
Putting the most identical, fall flow tube 6 is straight pipeline.Preferably, as it is shown in figure 1, in order to simplify structure, every layer
One fall flow tube 6 and two downflow weirs 7 are only set on sieve plate 5, and two downflow weirs 7 are oppositely arranged, so,
Only it is communicated with a fall flow tube 6 between every two-layer sieve plate 5, and adjacent two fall flow tube 6 lay respectively at tower body
Both sides.Preferably, as it is shown in figure 1, near the close return duct 8 on the sieve plate 5 at tower body top overflow
Stream weir 7 connects with this return duct 8, another downflow weir 7 on this sieve plate 5 and the fall flow tube 6 of this sieve plate 5
Connection.The other end (lower end) near the fall flow tube 6 on the sieve plate 5 bottom tower body connects to be had bottom one
Downflow weir, bottom this, downflow weir is cylindrically, slightly thicker than downspout 6, and internal and downspout 6 is connected to one
Rise, it is therefore intended that allow the liquid in the downspout 6 of bottom overflow from the thickest cylinder top, maintain
Certain pressure drops.Preferably, as it is shown in figure 1, all downflow weirs 7 are close to tower body inwall, the most permissible
Increase steam and liquid phase feed liquid flow area on sieve plate 5.
Multiple sieve aperture 501 for steam circulation and multiple for guiding is offered to steam on sieve plate 5
Pilot hole 502, the upflowing vapor overflowed in pilot hole 502 promotes the liquid phase feed liquid on sieve plate 5 to this layer of sieve plate
The fall flow tube 6 place effluent of 5 moves.Preferably, as it is shown in fig. 7, sieve plate 5 is circular metal plate, every layer of sieve
Sieve aperture 501 on plate 5 is all in triangular arranged, and triangular arranged is conducive to liquid on sieve plate
It is uniformly distributed, beneficially steam and the mass transfer of liquid phase.As shown in Figures 6 and 7, pilot hole 502 includes guiding
The prerotation vane 502B that hole opening 502A and the side from pilot hole opening 502A extend obliquely, prerotation vane
The direction that 502B extends is identical with the direction of liquid phase feed solution flow on sieve plate 5, and i.e. prerotation vane 502B is to this layer
Fall flow tube 6 place of sieve plate 5 rolls tiltedly.The change gas that act as of pilot hole moves towards, and produces liquid phase feed liquid
Raw impetus forward, making liquid phase feed liquid is piston flow, improves production capacity, gas motive force fall forward
Low liquid level drop, can improve mass-transfer efficiency.
Air pressure within tower body, less than the air pressure outside tower body, is so easy to be evaporated to the liquid phase feed liquid in tower body
Steam.Specifically, when the present invention is used as the boric acid solution distillation column in nuclear power station, the pressure within tower body
Scope is 0.1～0.12MPa, and temperature range is 100～105 DEG C.
Preferably, as it is shown in figure 1, bottom tower body, place is additionally provided with vortex shield 2, vortex shield 2 in tower body
With discharge nozzle 1 clamping.By arranging vortex shield 2, it is possible to prevent when discharge nozzle output concentrates liquid phase feed liquid to produce
Raw whirlpool.
Preferably, as it is shown in figure 1, be additionally provided with wire mesh demister 10 in tower body, wire mesh demister 10 is than sieve
Plate 5 is closer to tower body top.
Preferably, the structure of every layer of sieve plate is the most identical, and only need to be interlocked 180 ° by upper and lower sieve plate during installation is arranged,
Can be easy for installation, and manufacturing process can be reduced, reduce cost.
In the present invention, liquid phase feed liquid (such as boric acid solution) enters from feed pipe, discharges from discharge nozzle,
Form feed liquid closed circuit.And saturated feed liquid enters owing to pressure reduces from feed pipe, rise in forming tower and steam
Vapour.Upflowing vapor forms mass transfer by the liquid phase feed liquid on sieve plate, and liquid phase feed liquid is then by downflow weir and fall
Liquid pipe flows downward.Upflowing vapor then enters further in the wire mesh demister at top, carries secretly in steam
Liquid foam is removed by wire mesh demister.Clean steam is then discharged outside tower by steam outlet pipe, and then a cooling part
Forming distillate, a part is in return duct is back to tower.Meanwhile, the concentrated solution of tower bottom is along with distillation
Occurring further, boronic acid containing concentration is more and more higher, when reaching setting value, is then discharged by discharge nozzle.
The present invention can solve traditional packed tower and not reach the deficiency of degree of depth rectification, it is provided that a kind of high gas phase
The distilling apparatus of the convective mass transfer of load, improves distillation efficiency.The present invention uses novel linde sieve tray
Tower, its sieve-plate structure can improve liquid phase operational load, and liquid phase impact can be obtained more dispersed in tower by gas phase,
Gas phase is contacted with liquid phase more abundant, improves mass transfer effect, make steam and feed liquid carry out degree of depth mass transfer,
Choose suitable reflux ratio, and multiple sieve plate is set, thus reach the purpose of degree of depth rectification.
Above disclosed only one preferred embodiment of the present invention, can not limit this with this certainly
Bright interest field, one of ordinary skill in the art will appreciate that all or part of stream realizing above-described embodiment
Journey, and according to the equivalent variations that the claims in the present invention are made, still fall within the scope that invention is contained.
Claims (8)
1. a distilling apparatus, including tower body, described tower body is disposed with steam outlet pipe, feed pipe from top to bottom and goes out
Material pipe, it is characterised in that be provided with at least two-layer sieve plate on described tower body inwall, every layer of sieve plate is provided with two overflows
Weir, said two downflow weir is oppositely arranged, and every layer of sieve plate is also provided with at least one fall flow tube bottom described tower body,
One end of each fall flow tube connects with the downflow weir on its place sieve plate, and cylindrically, inside is connected downflow weir with fall flow tube
Together；The other end of the fall flow tube on last layer sieve plate stretches on next layer of sieve plate in the downflow weir of correspondence position, Mei Geyi
Stream weir at most connects with a fall flow tube, described sieve plate offers multiple sieve aperture circulated for steam and multiple for
The pilot hole guided to steam, described pilot hole includes that what pilot hole opening and the side from pilot hole opening extended obliquely leads
To sheet, the direction that described prerotation vane extends is identical with the direction of liquid phase feed solution flow on described sieve plate, overflows in described pilot hole
Upflowing vapor promote the liquid phase feed liquid on sieve plate to move to the fall flow tube place effluent of this layer of sieve plate.
2. distilling apparatus as claimed in claim 1, it is characterised in that the position of the downflow weir on every layer of sieve plate is the most identical,
Described fall flow tube is straight pipeline.
3. distilling apparatus as claimed in claim 2, it is characterised in that be additionally provided with return duct on described tower body, described time
Flow tube than described sieve plate closer to described tower body top.
4. distilling apparatus as claimed in claim 3, it is characterised in that near the close backflow on the sieve plate at tower body top
The downflow weir of pipe connects with described return duct；Fall stream near another downflow weir on the sieve plate at tower body top Yu this sieve plate
Pipe connects.
5. the distilling apparatus as according to any one of claim 2-4, it is characterised in that described downflow weir is close to described tower
Internal wall.
6. distilling apparatus as claimed in claim 5, it is characterised in that locate also to set in described tower body bottom described tower body
It is equipped with vortex shield, described vortex shield and described discharge nozzle clamping.
7. distilling apparatus as claimed in claim 6, it is characterised in that be additionally provided with wire mesh demister, institute in described tower body
State wire mesh demister than the described sieve plate near tower body top closer to described tower body top.
8. distilling apparatus as claimed in claim 7, it is characterised in that be provided with bracing ring on the inwall of described tower body,
Described every layer of sieve plate is connected with described bracing ring by connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310360535.5A CN103418151B (en) | 2013-08-19 | 2013-08-19 | A kind of distilling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310360535.5A CN103418151B (en) | 2013-08-19 | 2013-08-19 | A kind of distilling apparatus |
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| Publication Number | Publication Date |
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| CN103418151A CN103418151A (en) | 2013-12-04 |
| CN103418151B true CN103418151B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310360535.5A Active CN103418151B (en) | 2013-08-19 | 2013-08-19 | A kind of distilling apparatus |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104810071B (en) * | 2015-04-16 | 2017-02-22 | 湖南桃花江核电有限公司 | Method and equipment for deep purifying of boron-containing radioactive waste liquid and recovery of boric acid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419946A (en) * | 2001-11-16 | 2003-05-28 | 北京化工大学 | High-efficiency guide sieve-plate tower |
| CN101073710A (en) * | 2007-04-05 | 2007-11-21 | 南京化工职业技术学院 | Plated tower |
| CN201049217Y (en) * | 2007-04-05 | 2008-04-23 | 南京化工职业技术学院 | Board type tower |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398640A (en) * | 1989-09-12 | 1991-04-24 | Ngk Insulators Ltd | Ceramic packing material for fluid contact |
| JP3683054B2 (en) * | 1996-11-20 | 2005-08-17 | 東京瓦斯株式会社 | Water-based rectification equipment |
-
2013
- 2013-08-19 CN CN201310360535.5A patent/CN103418151B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419946A (en) * | 2001-11-16 | 2003-05-28 | 北京化工大学 | High-efficiency guide sieve-plate tower |
| CN101073710A (en) * | 2007-04-05 | 2007-11-21 | 南京化工职业技术学院 | Plated tower |
| CN201049217Y (en) * | 2007-04-05 | 2008-04-23 | 南京化工职业技术学院 | Board type tower |
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| CN103418151A (en) | 2013-12-04 |
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Address after: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Applicant after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Applicant after: China General Nuclear Power Corporation Applicant after: China Nuclear Power Engineering Co., Ltd. Address before: 518000 Guangdong, Futian District, Yitian Road, building A, block, building on the whole floor of A1301-1320 13 Applicant before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Applicant before: China General Nuclear Power Corporation Applicant before: China Nuclear Power Engineering Co., Ltd. |
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