CN103418151A - Distilling device - Google Patents
Distilling device Download PDFInfo
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- CN103418151A CN103418151A CN2013103605355A CN201310360535A CN103418151A CN 103418151 A CN103418151 A CN 103418151A CN 2013103605355 A CN2013103605355 A CN 2013103605355A CN 201310360535 A CN201310360535 A CN 201310360535A CN 103418151 A CN103418151 A CN 103418151A
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- sieve plate
- tower body
- distilling apparatus
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- downflow weir
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Abstract
An embodiment of the invention discloses a distilling device which comprises a tower. A steam outgoing pipe, a feeding pipe and a discharging pipe are sequentially arranged on the tower from top to bottom, at least two layers of screening plates are arranged on the inner wall of the tower, at least one overflow weir is arranged on each screening plate, at least one down-flow pipe is arranged facing the bottom of the tower and on each screening plate, one end of each down-flow pipe is communicated with one overflow weir on the screening plate where the down-flow pipe is positioned, the other end of the down-flow pipe on the screening plate on the next upper layer extends into the overflow weir, at the corresponding position, on the screening plate on the next lower layer, each overflow weir is communicated with one down-flow pipe at most, and multiple screening holes used for steam circulating and multiple guiding holes used for steam guiding are formed in the screening plates.
Description
Technical field
The present invention relates to chemical field, relate in particular to a kind of distilling apparatus.
Background technology
At present, in conventional distilling apparatus, only offer the passage of a plurality of certain diameters on sieve plate, when BAS flows on sieve plate, easily form " backflow " and " eddy flow ", cause plate efficiency lower.In addition, the distillation target of the rare BAS in nuclear power station boric acid recovery system is higher, and distillate needs boron concentration to reach below 5ppm, and existing BAS distilling apparatus is difficult to realize this goal.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, for prior art mesoboric acid solution distilling apparatus plate efficiency and the lower defect of separating degree, provides the distilling apparatus of a kind of high efficiency, high separation.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of distilling apparatus, comprise tower body, be disposed with from top to bottom steam outlet pipe on described tower body, feed pipe and discharge nozzle, be provided with at least two-layer sieve plate on described tower body inwall, be provided with at least one downflow weir on every layer of sieve plate, also towards described tower body bottom, be provided with at least one on every layer of sieve plate and fall the stream pipe, each end that falls the stream pipe is communicated with the downflow weir on its place sieve plate, the other end that falls the stream pipe on the last layer sieve plate stretches in the downflow weir of correspondence position on lower one deck sieve plate, each downflow weir at most falls stream and manages and be communicated with one, offer a plurality of sieve apertures for the steam circulation on described sieve plate, and a plurality of for the pilot hole to the steam guiding, liquid phase feed liquid on the rising Steam Actuation sieve plate overflowed in described pilot hole is managed the place side flow to the stream that falls 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 all identical, and described to fall the stream pipe be straight pipeline.
In distilling apparatus of the present invention, be provided with one on every layer of sieve plate and fall stream pipe and two downflow weirs, described two downflow weirs are oppositely arranged.
In distilling apparatus of the present invention, also be provided with return duct on described tower body, described return duct is than the more close described tower body of described sieve plate top.
In distilling apparatus of the present invention, the downflow weir of the close return duct on the sieve plate at the most close tower body top is communicated with described return duct, and another downflow weir on described sieve plate is communicated with the stream pipe that falls of described sieve plate.
In distilling apparatus of the present invention, described downflow weir is all near described tower body inwall.
In distilling apparatus of the present invention, described pilot hole comprises the pilot hole opening and from the upwardly extending prerotation vane of a skew back of pilot hole opening, and the direction that described prerotation vane the extends direction mobile with BAS on described sieve plate is identical.
In distilling apparatus of the present invention, in described tower body, near place, described tower body bottom, also be provided with vortex shield, described vortex shield and described discharge nozzle clamping.
In distilling apparatus of the present invention, also be provided with wire mesh demister in described tower body, described wire mesh demister is than the more close described tower body of described sieve plate top.
In distilling apparatus of the present invention, be provided with bracing ring on the inwall of described tower body, described sieve plate is connected with described bracing ring by connector.
Implement the embodiment of the present invention, there is following beneficial effect: by offer pilot hole on sieve plate, the steam that makes to rise produces impetus forward to the liquid phase feed liquid on sieve plate, make liquid phase feed liquid directed flow form piston flow, avoid liquid to produce " backflow ", " eddy flow " in column plate, can improve production capacity and plate efficiency; Flow pipe by the downflow weir that multiple sieve plate and correspondence are set with falling, can improve the separating degree of solute and water.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the distilling apparatus that provides of the preferred embodiment of the present invention;
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 that falls the stream pipe in distilling apparatus shown in Fig. 1;
Fig. 5 is the top view that falls the stream pipe 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.
The specific embodiment
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Distilling apparatus provided by the invention comprises tower body, and tower body can be divided into several parts, like this can be so that the installation and maintenance of tower body internal components.For example, the tower body shown in Fig. 1 is divided into tower top cover, tower body wall and three parts of tower chassis from top to bottom, between these three parts, by flange 4, interconnects.
Be disposed with from top to bottom steam outlet pipe 9, feed pipe 3 and discharge nozzle 1 on tower body.Because remaining concentrated solution after distilling collects in the tower body bottom, therefore usually discharge nozzle 1 is located to the tower body bottom, like this can be so that the concentrated solution outflow.Steam outlet pipe 9 operated by rotary motion are at the tower body top, and the steam after can conveniently distilling like this flows out.Feed pipe 3 can be arranged at any position higher than discharge nozzle 1 on tower body, and certainly, feed pipe 3 preferably exceeds discharge nozzle 1 one segment distances, to avoid ceaselessly discharging concentrated solution.If the position of feed pipe 3 is positioned at sieve plate 5 once, as shown in Figure 1, steam outlet pipe 9 is arranged on tower top cover, discharge nozzle 1 and feed pipe 3 all are arranged on tower chassis, at this moment, be preferably on tower body the position be positioned on sieve plate 5 return duct 8 is set, the position for example be positioned on the tower body wall on sieve plate 5 arranges return duct 8, like this, can make the rising steam in tower body form mass transfer through the liquid phase feed liquid on sieve plate 5.Mass transfer is the mass transfer process occurred because material concentration is inhomogeneous in system.In system, because entropy moves from the trend maximum, trend evenly, if the each several part non-uniform temperature can tend to a mean temperature, if density unevenness is even, also can tend to a mean concentration.The mass transfer steam mesoboric acid that can make to rise is tending towards, to liquid phase diffusion, making rising steam boronic acid containing concentration lower.As shown in Figure 1, return duct 8 is arranged under the flange that connects tower top cover and tower body wall, is a right angle bend pipe, for phegma, enters into downflow weir in tower.
Be provided with at least two-layer sieve plate 5 on the tower body inwall.Preferably, also be provided with bracing ring on the tower body inwall, 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 tower body bottom, (downward) is provided with at least one and falls stream and manage 6.Downflow weir 7 can form with downspout 6 fluid-tight of certain pressure, and after the full downflow weir 7 of liquid phase feed liquid collection, the meeting overflow is to sieve plate 5.The structure that downflow weir 7 overflows for liquid phase feed liquid on sieve plate 5, the effect that there is liquid layer on retaining plate and the liquid phase feed liquid is evenly overflowed.As shown in Figures 2 and 3, downflow weir 7 is set to chord-type weir mostly, and general weir length can be taken as 0.6～0.8 times of tower diameter, and the height on weir is determined according to different templates and liquid load.For gas-liquid two-phase is fully mixed, on sieve plate, to borrow downflow weir to maintain certain supernatant layer (suppose in liquid layer not gassiness phase time), supernatant layer increases, and the two-phase mixture of formation also increases, and time of contact and contact area be all corresponding increases also, and mass transfer is more abundant; But gas is by the also corresponding increase of pressure drop of liquid layer, and the leakage probability also can increase.Clear liquid layer height equals height of weir and weir supernatant layer height sum, and then responsibility depends on weir length and fluid flow.Decline liquid stream all passes through above weir, long to certain weir, and liquid stream increases, and weir supernatant layer height increases; To certain flow quantity, weir is long, and more supernatant layer height in weir is less, the long overflow periphery that is called again of Gu Yan.As very little as liquid measure, optional profile of tooth weir, the actual overflow periphery on profile of tooth weir can change within the specific limits with liquid measure.Downspout is the passage passed through between sieve plate for liquid in tower, the effect that also there is the axial mixing in gas phase between separate bubbles, minimizing plate, therefore need to keep liquid that certain time of staying is arranged in downspout, the General Requirements volume is no less than the fluid flow volume of 3～5ml, when liquid measure is large especially, can be worth a little less than this.Clear liquid floor height (because pressure balance causes) in pipe, be no more than 40%～60% of whole downspout height, in order to avoid cause liquid flooding.
Each end that falls stream pipe 6 is communicated with the downflow weir 7 on its place sieve plate 5, and the other end that falling stream pipe 6 on last layer sieve plate 5 stretches in the downflow weir 7 of correspondence position on lower one deck sieve plate 5, and each downflow weir 7 falls to flow and manages 6 and be communicated with one at most.Usually, fall between stream pipe 6 and sieve plate 5 and interconnect by welding manner or bolt connecting mode.The liquid phase feed liquid of upper strata sieve plate can be by letting out under the downspout on this layer of sieve plate to the downflow weir of the correspondence position on lower floor's sieve plate.Can be provided with a plurality of downflow weirs 7 and a plurality of stream pipe 6 that falls on one deck sieve plate 5, last layer sieve plate 5 fall stream pipe 6 all downwards one deck stretch out and be communicated with the downflow weir 7 of correspondence position on lower one deck sieve plate 5, for the liquid phase feed liquid can flow on sieve plate 5, each downflow weir 7 only falls stream pipe 6 and is communicated with one, that is to say, on adjacent two layers sieve plate 5, falling the setting of staggering of stream pipe.Preferably, in order to reduce the making manufacture difficulty, as shown in Figure 1, the position of the downflow weir 7 on every layer of sieve plate 5 is all identical, and falling stream pipe 6 is straight pipelines.Preferably, as shown in Figure 1, for simplified structure, only arrange one on every layer of sieve plate 5 and fall 6 and two downflow weirs 7 of stream pipe, and two downflow weirs 7 are oppositely arranged, like this, only be communicated with one between every two-layer sieve plate 5 and fall stream pipe 6, and adjacent two are fallen the both sides that stream pipe 6 lays respectively at tower body.Preferably, as shown in Figure 1, the downflow weir 7 of the close return duct 8 on the sieve plate 5 at the most close tower body top is communicated with this return duct 8, and another downflow weir 7 on this sieve plate 5 is communicated with the stream pipe 6 that falls of this sieve plate 5.The other end (lower end) that falls stream pipe 6 on the sieve plate 5 of the most close tower body bottom is connected with a bottom downflow weir, this bottom downflow weir is cylindric, slightly thicker than downspout 6, inner and downspout 6 links together, purpose is to allow the liquid in the downspout 6 of below overflow from slightly thick cylinder top, maintains certain pressure and falls.Preferably, as shown in Figure 1, all downflow weirs 7, all near the tower body inwall, can increase steam and the flow area of liquid phase feed liquid on sieve plate 5 like this.
Offer a plurality of sieve apertures 501 for the steam circulation and a plurality of for the pilot hole 502 to the steam guiding on sieve plate 5, the liquid phase feed liquid on the rising Steam Actuation sieve plate 5 overflowed in pilot hole 502 is managed 6 place side flow to the stream that falls of this layer of sieve plate 5.Preferably, as shown in Figure 7, sieve plate 5 is circular metal plate, and the sieve aperture 501 on every layer of sieve plate 5 all is triangular arranged, and triangular arranged is conducive to liquid and is uniformly distributed on sieve plate, is conducive to the mass transfer of steam and liquid phase.As shown in Figures 6 and 7, pilot hole 502 comprises pilot hole opening 502A and from the upwardly extending prerotation vane 502B of a skew back of pilot hole opening 502A, the direction that prerotation vane 502B the extends direction mobile with liquid phase feed liquid on sieve plate 5 is identical, and prerotation vane 502B rolls oblique to stream pipe 6 places that fall of this layer of sieve plate 5.Acting as of pilot hole changes the gas trend, and the liquid phase feed liquid is produced to impetus forward, makes the liquid phase feed liquid be piston flow, improves production capacity, and gas motive force has forward reduced liquid level drop, can improve mass-transfer efficiency.
The air pressure that the air pressure of tower body inside is outer lower than tower body, be convenient to the liquid phase feed liquid in tower body is evaporated to steam like this.Particularly, when the present invention is used as the BAS destilling tower in nuclear power station, the pressure limit of tower body inside is 0.1～0.12MPa, and temperature range is 100～105 ℃.
Preferably, as shown in Figure 1, in tower body, near place, tower body bottom, also be provided with vortex shield 2, vortex shield 2 and discharge nozzle 1 clamping.By vortex shield 2 is set, produce whirlpool in the time of can preventing from the concentrated liquid phase feed liquid of discharge nozzle output.
Preferably, as shown in Figure 1, also be provided with wire mesh demister 10 in tower body, wire mesh demister 10 is than the more close tower body of sieve plate 5 top.
Preferably, the structure of every layer of sieve plate is all identical, and the 180 ° of settings that only upper and lower sieve plate need be interlocked during installation, can be easy for installation, and can reduce manufacturing process, reduces costs.
In the present invention, liquid phase feed liquid (for example BAS) enters from feed pipe, from discharge nozzle, discharges, and forms the feed liquid closed circuit.And saturated feed liquid enters due to pressure decreased from feed pipe, form rising steam in tower.Rising steam forms mass transfer by the liquid phase feed liquid on sieve plate, and the liquid phase feed liquid flows downward by downflow weir and downspout.Rising steam further enters in the wire mesh demister at top, and the liquid foam of carrying secretly in steam is removed by wire mesh demister.Clean steam is discharged outside tower by steam outlet pipe, and then cooling part formation distillate, and a part is in return duct is back to tower.Simultaneously, the concentrate of tower bottom is along with the further generation of distillation, and boronic acid containing concentration is more and more higher, when reaching setting value, by discharge nozzle, discharges.
The present invention can solve the deficiency that traditional packed tower does not reach degree of depth rectifying, and a kind of distilling apparatus of convective mass transfer of high gas phase load is provided, and has improved distillation efficiency.What the present invention adopted is novel guide sieve-plate tower, its sieve-plate structure can improve the liquid phase operational load, gas phase can obtain liquid phase impact more in tower disperses, make gas phase contact with liquid phase more abundant, improve mass transfer effect, made steam and feed liquid carry out degree of depth mass transfer, chosen suitable reflux ratio, and multiple sieve plate is set, thereby reach the purpose of degree of depth rectifying.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.
Claims (10)
1. a distilling apparatus, comprise tower body, be disposed with from top to bottom steam outlet pipe on described tower body, feed pipe and discharge nozzle, it is characterized in that, be provided with at least two-layer sieve plate on described tower body inwall, be provided with at least one downflow weir on every layer of sieve plate, also towards described tower body bottom, be provided with at least one on every layer of sieve plate and fall the stream pipe, each end that falls the stream pipe is communicated with the downflow weir on its place sieve plate, the other end that falls the stream pipe on the last layer sieve plate stretches in the downflow weir of correspondence position on lower one deck sieve plate, each downflow weir at most falls stream and manages and be communicated with one, offer a plurality of sieve apertures for the steam circulation on described sieve plate, and a plurality of for the pilot hole to the steam guiding, liquid phase feed liquid on the rising Steam Actuation sieve plate overflowed in described pilot hole is managed the place side flow to the stream that falls of this layer of sieve plate.
2. distilling apparatus as claimed in claim 1, is characterized in that, the position of the downflow weir on every layer of sieve plate is all identical, and described to fall the stream pipe be straight pipeline.
3. distilling apparatus as claimed in claim 2, is characterized in that, is provided with one on every layer of sieve plate and falls stream pipe and two downflow weirs, and described two downflow weirs are oppositely arranged.
4. distilling apparatus as claimed in claim 3, is characterized in that, also is provided with return duct on described tower body, and described return duct is than the more close described tower body of described sieve plate top.
5. fairing as claimed in claim 4, is characterized in that, the downflow weir of the close return duct on the sieve plate at the most close tower body top is communicated with described return duct, and another downflow weir on described sieve plate is communicated with the stream pipe that falls of described sieve plate.
6. fairing as described as any one in claim 2-5, is characterized in that, described downflow weir is all near described tower body inwall.
7. distilling apparatus as claimed in claim 6, is characterized in that, described pilot hole comprises the pilot hole opening and from the upwardly extending prerotation vane of a skew back of pilot hole opening, and the direction that described prerotation vane the extends direction mobile with BAS on described sieve plate is identical.
8. distilling apparatus as claimed in claim 7, is characterized in that, in described tower body, near place, described tower body bottom, also is provided with vortex shield, described vortex shield and described discharge nozzle clamping.
9. distilling apparatus as claimed in claim 8, is characterized in that, also is provided with wire mesh demister in described tower body, and described wire mesh demister is than the more close described tower body of described sieve plate top.
10. distilling apparatus as claimed in claim 9, is characterized in that, on the inwall of described tower body, is provided with bracing ring, and described 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 |
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| 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 true CN103418151A (en) | 2013-12-04 |
| CN103418151B CN103418151B (en) | 2016-08-24 |
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| CN201310360535.5A Active CN103418151B (en) | 2013-08-19 | 2013-08-19 | A kind of distilling apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810071A (en) * | 2015-04-16 | 2015-07-29 | 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 (5)
| 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 |
| JPH10148417A (en) * | 1996-11-20 | 1998-06-02 | Tokyo Gas Co Ltd | Water based rectification apparatus |
| 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 |
-
2013
- 2013-08-19 CN CN201310360535.5A patent/CN103418151B/en active Active
Patent Citations (5)
| 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 |
| JPH10148417A (en) * | 1996-11-20 | 1998-06-02 | Tokyo Gas Co Ltd | Water based rectification apparatus |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810071A (en) * | 2015-04-16 | 2015-07-29 | 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 |
| 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 |
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| CN103418151B (en) | 2016-08-24 |
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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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