CN203790598U - Falling film evaporator - Google Patents
Falling film evaporator Download PDFInfo
- Publication number
- CN203790598U CN203790598U CN201420062720.6U CN201420062720U CN203790598U CN 203790598 U CN203790598 U CN 203790598U CN 201420062720 U CN201420062720 U CN 201420062720U CN 203790598 U CN203790598 U CN 203790598U
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- China
- Prior art keywords
- distribution
- cavity
- take
- heat exchanger
- film evaporator
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- 239000011552 falling film Substances 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
The utility model discloses a falling film evaporator and belongs to the technical field of evaporator equipment. The evaporator comprises a shell, an upper tube plate, a lower tube plate, heat exchange tubes and an input tube, wherein the upper tube plate and the lower tube plate are mounted at the upper part and the lower part in the shell, respectively; one end of each heat exchange tube is fixed on the upper tube plate, and the other end of each heat exchange tube is fixed on the lower tube plate. The evaporator further comprises an upper distribution plate and a lower distribution plate, wherein the upper distribution plate and the lower distribution plate are sequentially arranged above the upper tube plate from top to bottom. A cavity body above the upper tube plate is divided into an accommodating cavity, an upper distribution cavity and a lower distribution cavity, and an opening of the input pipe is formed in the accommodating cavity. Distribution holes for communicating the accommodating cavity with the upper distribution cavity are formed in the upper distribution plate, and a guide tube for communicating the upper distribution cavity with the lower distribution cavity is arranged on the lower distribution plate. Liquid to be concentrated can be uniformly distributed into each heat exchange tube through multiple times of distribution of a two-layer distributor, and a film-forming effect of the liquid to be concentrated in the heat exchange tubes is improved. The falling film evaporator has the advantages of high heat exchange efficiency, low liquid circulation amount and less possibility of scaling.
Description
Technical field
The utility model relates to evaporator device technical field, particularly relates to a kind of downward film evaporator.
Background technology
In conventional falling film evaporator, conventionally by the mode of overflow, solution to be concentrated is distributed in heat exchanger tube, make solution to be concentrated in heat exchanger tube, become evenly membranaceous and flow from top to bottom.In flow process, thereby be heated, carry out evaporating concentration process.
But, use conventional falling film evaporator, often there will be phenomenon pockety; cause the interior film-formation result of heat exchanger tube poor, when serious, even occur " dry wall " phenomenon, thereby affect evaporation effect; especially when load changes, the non-uniform phenomenon of sub-material is more obvious.
Summary of the invention
Based on this, the purpose of this utility model is to overcome the defect of prior art, and a kind of downward film evaporator is provided, and adopts this evaporimeter, solution to be concentrated can be distributed in heat exchanger tube uniformly, obtains good evaporation effect.
For achieving the above object, the utility model is taked following technical scheme:
A downward film evaporator, comprises housing, upper perforated plate, lower perforated plate, heat exchanger tube, input pipe, and described upper perforated plate and lower perforated plate are installed on respectively the upper and lower in housing, and described heat exchanger tube one end is fixed on upper perforated plate, and the other end is fixed on lower perforated plate; Also comprise distribution grid, lower distribution grid, described upper perforated plate top is from top to bottom provided with distribution grid and lower distribution grid successively, and upper perforated plate is divided into container cavity, upper distribution cavity and lower distribution cavity with upper cavity; Described input pipe is opened in container cavity, and described upper distribution grid is provided with the distribution hole that is communicated with container cavity and upper distribution cavity, and described lower distribution grid is provided with the mozzle that is communicated with upper distribution cavity and lower distribution cavity.
Downward film evaporator of the present utility model, the double-deck distributor that in employing, distribution grid and lower distribution grid form, when solution to be concentrated enters after the container cavity of evaporimeter by input pipe, solution to be concentrated enters upper distribution cavity by the distribution hole on upper distribution grid by container cavity, by mozzle, in upper distribution cavity, enter again subsequently lower distribution cavity, by the distribution of twice, guaranteed the uniformity that solution to be concentrated distributes, make solution to be concentrated in heat exchanger tube better must form membranaceous, can effectively reduce the internal circulating load of solution to be concentrated, thereby realize the raising of evaporation efficiency.
In an embodiment, described mozzle is arranged in the water conservancy diversion entry position of distribution cavity higher than the upper surface of lower distribution grid therein.Solution to be concentrated is accumulated in upper distribution cavity, after the water conservancy diversion entrance of last liquid level higher than mozzle, mode with overflow enters mozzle, enters lower distribution cavity after can making solution to be concentrated be evenly distributed in upper distribution cavity again, and can guarantee all can water conservancy diversion solution to be concentrated in all mozzles.Meanwhile, by the mode of overflow, make the solution to be concentrated mozzle tube wall of flowing through form liquid film, play the effect of membranaceous water conservancy diversion.
In an embodiment, described mozzle be take three to six as one group therein, take its water conservancy diversion entrance center as end points formation regular polygon; The centre of form of this regular polygon of Kong Xinyu of described distribution hole is positioned on same vertical axis.Above-mentioned setting is evenly distributed after solution to be concentrated is flowed out by distribution hole between a plurality of water conservancy diversion entrances, reaches the object that solution to be concentrated is evenly distributed.
In an embodiment, described mozzle be take three as one group therein, take its water conservancy diversion entrance center as end points formation equilateral triangle.Mozzle is set to triplets, and press equilateral triangle and arrange, can make each mozzle and its around any two mozzles all can form equilateral triangle, allow each distribution hole be three mozzle feed flows, also allow each mozzle accept the feed flow of three distribution holes, reach better mean allocation effect.
Therein in an embodiment, described to take water conservancy diversion entrance center be the radius that the equilateral triangle centre of form that forms of end points and the distance between water conservancy diversion ingress edge are greater than distribution hole.After solution to be concentrated is flowed out by distribution hole, now descend on distribution grid and accumulate, avoid it directly to enter water conservancy diversion entrance, guarantee that solution to be concentrated can accumulate in upper distribution cavity, and enter mozzle by the mode of overflow, reach the object being evenly distributed.
In an embodiment, described heat exchanger tube be take three to six as one group therein, take its die as end points formation regular polygon; Described mozzle is arranged in the diversion outlet center of lower distribution cavity and the centre of form of this regular polygon is positioned on same vertical axis.Above-mentioned be arranged so that solution to be concentrated is flowed out by diversion outlet after, between a plurality of heat exchanger tubes, be evenly distributed, reach the object that solution to be concentrated is evenly distributed.
In an embodiment, described heat exchanger tube be take three as one group therein, take its die as end points formation equilateral triangle.Heat exchanger tube is set to triplets, and press equilateral triangle and arrange, can make each heat exchanger tube and its around any two heat exchanger tubes all can form equilateral triangle, allow each mozzle be three heat exchanger tube feed flows, also allow each heat exchanger tube accept the feed flow of three mozzles, reach the effect that is better evenly distributed solution to be concentrated.
Therein in an embodiment, described to take heat exchanger tube die be the radius that the equilateral triangle centre of form that forms of end points and the distance between heat exchanger tube edge are less than mozzle diversion outlet.Make, after the diversion outlet outflow of membranaceous solution to be concentrated by mozzle, can enter in heat exchanger tube, improve the film-formation result of solution to be concentrated in heat exchanger tube.
Compared with prior art, the utlity model has following beneficial effect:
Downward film evaporator of the present utility model, by two-layer distributor repeated dispensing, solution to be concentrated can be distributed in every heat exchanger tube uniformly, improve the film-formation result of solution to be concentrated in heat exchanger tube, have advantages of that heat exchange efficiency is high, liquid circulation amount is low, less scaling.
And this downward film evaporator, by mozzle, be set to triplets, and press equilateral triangle and arrange, and heat exchanger tube is set to triplets, and press the mode that equilateral triangle is arranged, can better solution to be concentrated be evenly distributed in every heat exchanger tube, further improve the film-formation result of solution to be concentrated in heat exchanger tube.
Accompanying drawing explanation
Fig. 1 is downward film evaporator structural representation in the specific embodiment;
Fig. 2 is A part partial enlarged drawing in Fig. 1;
Fig. 3 is distribution hole and mozzle position relationship schematic top plan view;
Fig. 4 is mozzle and heat exchanger tube position relationship schematic top plan view.
Wherein: 1. housing; 2. upper perforated plate; 3. lower perforated plate; 4. heat exchanger tube; 5. input pipe; 51. input pipe imports; 52. input pipe outlets; 6. go up distribution grid; 61. distribution holes; 62. bolts; 7. descend distribution grid; 71. mozzles; 72. gripper shoes; 81. shell side imports; 82. shell side outlets; 91. concentrated solution outlets; 92. flash steam outlets.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, describe the utility model in detail.
A kind of downward film evaporator, as shown in Figure 1, comprise housing 1, upper perforated plate 2, lower perforated plate 3, heat exchanger tube 4, input pipe 5, described upper perforated plate 2 and lower perforated plate 3 are installed on respectively the upper and lower in housing 1, described heat exchanger tube 4 one end are fixed on upper perforated plate 2, and the other end is fixed on lower perforated plate 3; Also comprise distribution grid 6, lower distribution grid 7, described upper perforated plate 2 tops are from top to bottom provided with distribution grid 6 and lower distribution grid 7 successively, and upper perforated plate 2 is divided into container cavity, upper distribution cavity and lower distribution cavity with upper cavity; Described input pipe 5 is opened in container cavity, and described upper distribution grid 6 is provided with the distribution hole 61 that is communicated with container cavity and upper distribution cavity, and described lower distribution grid 7 is provided with the mozzle 71 that is communicated with upper distribution cavity and lower distribution cavity, as shown in Figure 2.
Described lower distribution grid 7 is bolted on housing 1, is welded and fixed with input pipe 5 simultaneously, also by gripper shoe 72, is supported on upper perforated plate 2.Described upper distribution grid 6 is fixed on lower distribution grid 7 by bolt 62, is also welded and fixed with input pipe 5 simultaneously, improves the steadiness of this equipment, as shown in Figure 2.
Described mozzle 71 is arranged in the water conservancy diversion entry position of distribution cavity higher than the upper surface of lower distribution grid 7.This mozzle 71 be take three as one group, take its water conservancy diversion entrance center as end points formation equilateral triangle, and the centre of form of this regular polygon of Kong Xinyu of described distribution hole 61 is positioned on same vertical axis, and as shown in Figure 3, and this distribution hole 61 is also to arrange according to equilateral triangle.By above-mentioned setting, can make each mozzle 71 and any two mozzles around it all can form equilateral triangle, allow each distribution hole be three mozzle feed flows, also allow each mozzle accept the feed flow of three distribution holes, reach the effect that is better evenly distributed solution to be concentrated.
And above-mentionedly take the radius r that the equilateral triangle centre of form that water conservancy diversion entrance center is that end points forms and the distance l between water conservancy diversion ingress edge be greater than distribution hole 61, as shown in Figure 3.
Described heat exchanger tube 4 be take three as one group, take its die as end points formation equilateral triangle.This mozzle 71 is arranged in the diversion outlet center of lower distribution cavity and the centre of form of this regular polygon is positioned on same vertical axis, as shown in Figure 4.By above-mentioned setting, can make each heat exchanger tube and its around any two heat exchanger tubes all can form equilateral triangle, allow each mozzle be three heat exchanger tube feed flows, also allow each heat exchanger tube accept the feed flow of three mozzles, reach the effect that is better evenly distributed solution to be concentrated.
And above-mentionedly take the radius R that the equilateral triangle centre of form that heat exchanger tube die is that end points forms and the distance L between this heat exchanger tube edge be less than mozzle 71 diversion outlets, as shown in Figure 4.
The downward film evaporator workflow of the present embodiment is as follows:
First, solution to be concentrated is entered in input pipe 5 by input pipe import 51 by front pump, and transportation from the bottom up in input pipe 5, is entered in the container cavity of evaporimeter upper end by input pipe outlet 52.
Via the distribution hole 61 on upper distribution grid 6, flow in upper distribution cavity subsequently, the mozzle 71 that lower distribution grid 7 is provided with is arranged by equilateral triangle, distribution hole 61 is over against the centre of form of this equilateral triangle, thereby make solution to be concentrated by distribution hole, be flowed into the zone line of three mozzles, reach the object of mean allocation.
Now, solution to be concentrated is accumulated on lower distribution grid 7, finally after the liquid level of the solution to be concentrated water conservancy diversion entrance higher than mozzle 71, mode with overflow enters mozzle 71, and form membranaceous liquid in the process of mozzle 71 tube walls of flowing through, finally the diversion outlet by mozzle 71 flows out, through upper perforated plate 2, enter in heat exchanger tube 4, this heat exchanger tube 4 is also pressed equilateral triangle and is arranged, diversion outlet is over against the centre of form of this equilateral triangle, thereby make solution to be concentrated by mozzle, be flowed into the zone line of three heat exchanger tubes, mean allocation in heat exchanger tube.
Finally, solution to be concentrated carries out abundant heat exchange with shell side thermal source gas with liquid film state in heat exchanger tube 4, and thermal source gas is entered by the shell side import 81 that is positioned at evaporimeter top, after heat exchange, from being positioned at the shell side outlet 82 of evaporimeter bottom, flows out.Solution to be concentrated, under the promotion of gravity and thermal source gas, flows from top to bottom with membranaceous, carries out gas-liquid separation in the bobbin carriage of evaporimeter lower end, and flash steam flows out from flash steam outlet 92, and the concentrate of acquisition flows out from the concentrated solution outlet 91 of base of evaporator.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (8)
1. a downward film evaporator, comprises housing, upper perforated plate, lower perforated plate, heat exchanger tube, input pipe, and described upper perforated plate and lower perforated plate are installed on respectively the upper and lower in housing, and described heat exchanger tube one end is fixed on upper perforated plate, and the other end is fixed on lower perforated plate; It is characterized in that, also comprise distribution grid, lower distribution grid, described upper perforated plate top is from top to bottom provided with distribution grid and lower distribution grid successively, and upper perforated plate is divided into container cavity, upper distribution cavity and lower distribution cavity with upper cavity; Described input pipe is opened in container cavity, and described upper distribution grid is provided with the distribution hole that is communicated with container cavity and upper distribution cavity, and described lower distribution grid is provided with the mozzle that is communicated with upper distribution cavity and lower distribution cavity.
2. downward film evaporator according to claim 1, is characterized in that, described mozzle is arranged in the water conservancy diversion entry position of distribution cavity higher than the upper surface of lower distribution grid.
3. downward film evaporator according to claim 2, is characterized in that, described mozzle be take three to six as one group, take its water conservancy diversion entrance center as end points formation regular polygon; The centre of form of this regular polygon of Kong Xinyu of described distribution hole is positioned on same vertical axis.
4. downward film evaporator according to claim 3, is characterized in that, described mozzle be take three as one group, take its water conservancy diversion entrance center as end points formation equilateral triangle.
5. downward film evaporator according to claim 4, is characterized in that, describedly take the radius that the equilateral triangle centre of form that water conservancy diversion entrance center is that end points forms and the distance between water conservancy diversion ingress edge be greater than distribution hole.
6. according to the downward film evaporator described in claim 1-5 any one, it is characterized in that, described heat exchanger tube be take three to six as one group, take its die as end points formation regular polygon; Described mozzle is arranged in the diversion outlet center of lower distribution cavity and the centre of form of this regular polygon is positioned on same vertical axis.
7. downward film evaporator according to claim 6, is characterized in that, described heat exchanger tube be take three as one group, take its die as end points formation equilateral triangle.
8. downward film evaporator according to claim 7, is characterized in that, describedly take the radius that the equilateral triangle centre of form that heat exchanger tube die is that end points forms and the distance between heat exchanger tube edge be less than mozzle diversion outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062720.6U CN203790598U (en) | 2014-02-11 | 2014-02-11 | Falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062720.6U CN203790598U (en) | 2014-02-11 | 2014-02-11 | Falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203790598U true CN203790598U (en) | 2014-08-27 |
Family
ID=51372873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420062720.6U Expired - Lifetime CN203790598U (en) | 2014-02-11 | 2014-02-11 | Falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203790598U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781785A (en) * | 2016-04-28 | 2016-07-20 | 中国船舶重工集团公司第七〇九研究所 | Tubular heater with gas-collecting ring |
| CN106039747A (en) * | 2016-07-13 | 2016-10-26 | 范亚平 | Vertical-type stock-solution outside tube falling-film evaporator |
| CN106693419A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Vertical tube falling-film evaporator |
| CN109876475A (en) * | 2019-03-29 | 2019-06-14 | 无锡化工装备股份有限公司 | A kind of multiple field liquid distribution device of falling-film reboiler |
-
2014
- 2014-02-11 CN CN201420062720.6U patent/CN203790598U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693419A (en) * | 2015-11-12 | 2017-05-24 | 中国石油化工股份有限公司 | Vertical tube falling-film evaporator |
| CN105781785A (en) * | 2016-04-28 | 2016-07-20 | 中国船舶重工集团公司第七〇九研究所 | Tubular heater with gas-collecting ring |
| CN106039747A (en) * | 2016-07-13 | 2016-10-26 | 范亚平 | Vertical-type stock-solution outside tube falling-film evaporator |
| CN109876475A (en) * | 2019-03-29 | 2019-06-14 | 无锡化工装备股份有限公司 | A kind of multiple field liquid distribution device of falling-film reboiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
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| CX01 | Expiry of patent term |