CN202237299U - Sugar solution evaporator employing rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube - Google Patents
Sugar solution evaporator employing rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube Download PDFInfo
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- CN202237299U CN202237299U CN2011203324432U CN201120332443U CN202237299U CN 202237299 U CN202237299 U CN 202237299U CN 2011203324432 U CN2011203324432 U CN 2011203324432U CN 201120332443 U CN201120332443 U CN 201120332443U CN 202237299 U CN202237299 U CN 202237299U
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- spinning disk
- sugar solution
- liquid glucose
- diverging
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Abstract
The utility model discloses a sugar solution evaporator employing a rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube. The sugar solution evaporator comprises a barrel, and an upper vapor chamber, an upper tube plate, the rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube, a central downcomer of which the axis is overlapped with that of a cylinder, a lower tube plate and a lower head. The bottom of the lower head is provided with a tube pass sugar solution outlet and a tube pass sugar solution inlet; the top of the upper vapor chamber is provided with a tube pass secondary vapor outlet; and the cylinder between the upper tube plate and the lower tube plate is provided with a shell pass primary vapor inlet and a shell pass condensed water outlet. The sugar solution evaporator performs locally intelligent repeated replacement and disturbance on a main stream in the tube and a fluid near the wall through a periodically converging and diverging rib surface and the inserted rotational flow sheet of the converging-diverging tube, so that the concentration and viscosity of the sugar solution are distributed more uniformly on a flow channel section for flowing, boiling and vaporizing under the natural convection condition, the convection heat-transfer coefficient and the convection diffusivity of the fluid in the tube are obviously improved, a phenomenon that the concentration and viscosity distribution of the sugar solution in a fluid central area and a near-wall area are not uniform is improved, and scale depositing of the sugar solution on a wall surface is reduced.
Description
Technical field
The utility model relates to the evaporimeter of augmentation of heat transfer, inserts the liquid glucose evaporimeter of spinning disk sharp expansion and accelerated flow converging-diverging tube in being specifically related to adopt.Key in technical field herein and describe paragraph.
Background technology
Existing vaporizer technology has multiple; Shell-and-tube evaporator for example; Plate-type evaporator adopts the evaporimeter of free convection or forced convection flow boiling and the evaporimeter of employing falling film evaporation etc., and the liquid glucose evaporimeter overwhelming majority in sugar industry adopts traditional plain tube shell-and-tube evaporator at present; Heat transfer type is the heat transfer type that adopts free convection or the evaporation of forced convection flow boiling; The advantage of this evaporimeter is that mechanical seal property is good, and bearing capacity is high, and the sealing between cold and hot two side runners of tube side and shell side has only welding or the expanded joint sealing between the tube-to-tube sheet connection of tube bank two ends; Therefore can be applied to the heat exchange occasion of high temperature and high pressure, in sugar industry, continue to use for a long time always.But because the viscosity of liquid glucose is bigger; The flow boiling evaporation heat transfer operation Reynolds number of free convection in the plain tube evaporimeter or forced convection is very low; Be in the flow regime of laminar flow or transition flow, the center is difficult to do double replacement mutually with the fluid of near wall region in pipe, and the transmission efficiency of fluid dependence self molecular diffusion and heat conduction is very low; Cause the sugar concentration and the viscosity profile meeting difference of fluid center and near wall region very big; This not only can cause the flow velocity of the nearly wall of fluid slow, and heat transfer coefficient is low, also can cause the near wall region sugar concentration too high and the serious incrustation phenomenon of wall occurs.
Summary of the invention
For solving defective and the deficiency that existing correlation technique exists, the utility model provides the liquid glucose evaporimeter of inserting the spinning disk sharp expansion and accelerated flow converging-diverging tube in a kind of the employing.
Insert the liquid glucose evaporimeter of spinning disk sharp expansion and accelerated flow converging-diverging tube in adopting; Comprise central well down take 7, lower perforated plate 3 and low head 2 that last steam chest 10, upper perforated plate 8, axis that cylindrical shell 5 and barrel set gradually overlap with tubular axis from top to bottom; Central well down take 7 two ends are connected with lower perforated plate 3 with upper perforated plate 8 respectively; Be provided with gas-liquid separator 9 in the last steam chest 10; Low head 2 bottoms are provided with tube side liquid glucose outlet 1; The ring set pipeline of low head 2 bottoms also is provided with tube side liquid glucose inlet 13, and last steam chest 10 tops are provided with tube side indirect steam outlet 11, and the cylindrical shell outer setting between upper perforated plate 8 and the lower perforated plate 3 has shell side primary steam inlet 12 and shell side condensation-water drain 4; Said shell side condensation-water drain 4 is close to lower perforated plate 3 tops, also comprises the interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 that the body two ends are connected with lower perforated plate 3 with upper perforated plate 8 respectively.
Spinning disk is even vertically in the slotting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 in said splits at interval, and the length of spinning disk is 1 times～15 times of caliber, and the rate of turning round is 1～6, and the spinning disk spacing is 1 times～50 times of caliber.
The said interior pipeline section of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 is pressed the tube fluid direction of motion and is installed by the conical camber direction of elder generation's anxious expansion back convergent.
The caliber size of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 in said is 20mm～70mm.
The anxious reamer shape curved surface length of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 in said is 2 times～15 times of tapered conical curved surface length, and periodically rib spacing is dark 5 times～15 times of rib, and rib is 2%～10% of caliber deeply.
The said interior pipeline section of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 is pressed the tube fluid direction of motion and is installed by the conical camber direction of elder generation's anxious expansion back convergent.
Said interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 is triangular in shape, square or annular array along the cylindrical shell annular region.
Further, said gas-liquid separator 9 is made up of multilayer herringbone strip metal plate resistance liquid layer in the opposite direction.
The angle of herringbone strip metal plate resistance liquid layer is 30 °～120 °, and the metallic plate width is 20mm～200mm, and plate thickness is 1mm～10mm, and the length of gas-liquid separator 9 is the inboard radial distance of last steam chest 10.
Multilayer herringbone strip metal plate resistance liquid layer in the opposite direction makes steam through baffling is successively upwards mobile repeatedly, can effectively separate the drop that it carries, and plays the effect of gas-liquid separation.
Interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube can effectively improve the heat transfer coefficient of tube fluid; And liquid glucose as far as under free convection or forced convection flow boiling condition, conducting heat; Can do effectively local displacement to nearly wall fluid of heat-transfer pipe and center fluid; Make the sugar concentration distribution of fluid center and near wall region and the inhomogeneities of viscosity profile significantly to reduce; Improve the convection current diffusivity of fluid mass and heat, when improving heat transfer efficiency, also can effectively alleviate the near wall region liquid glucose because of the high wall incrustation phenomenon that occurs of concentration.Therefore the liquid glucose evaporimeter can significantly improve heat-transfer pipe tube fluid convective heat-transfer coefficient, effectively improves fluid center and the near wall region sugar concentration distribution phenomenon uneven with viscosity profile, improves the convection current diffusivity and minimizing wall incrustation of fluid mass and heat.
Compared with prior art, the utlity model has following advantage:
(1) inserts the spinning disk sharp expansion and accelerated flow converging-diverging tube in the liquid glucose evaporimeter of the utility model adopts; Utilize asymmetrical anxious expansion of its periodicity to reach the interior function that the spinning disk convection cell has nearly wall periodic replacement and disturbance of inserting with the convergent curved surface; Change the flow direction and raising turbulivity of fluid near wall region; Can produce stronger heat transfer field synergy, carry under the identical condition of power consumption, compare the convective heat-transfer coefficient that can significantly improve fluid with smooth heat transfer tube at fluid;
(2) insert the spinning disk sharp expansion and accelerated flow converging-diverging tube in the utility model adopts and substitute smooth heat transfer tube in the liquid glucose evaporimeter; As far as the liquid glucose that under free convection or forced convection flow boiling condition, conducts heat; Can do effectively local displacement to nearly wall fluid of heat-transfer pipe and center fluid; Make the distribution of fluid center and near wall region sugar concentration and the inhomogeneities of viscosity profile significantly to reduce; Improve the convection current diffusivity of fluid mass and heat, alleviate the near wall region liquid glucose because of the high wall incrustation phenomenon that occurs of concentration.
Description of drawings
Fig. 1 is the front elevational schematic of the utility model liquid glucose evaporimeter;
Fig. 2 is the analyse and observe schematic top plan view of Fig. 1 along the A-A line;
Fig. 3 is an interior front view of inserting the spinning disk sharp expansion and accelerated flow converging-diverging tube shown in Figure 1;
Fig. 4 is an interior front view of inserting spinning disk in the spinning disk sharp expansion and accelerated flow converging-diverging tube pipe shown in Figure 1;
Fig. 5 is the front view of herringbone strip metal plate resistance liquid layer in the gas-liquid separator shown in Figure 1;
Fig. 6 is the front elevational schematic of gas-liquid separator shown in Figure 1;
Fig. 7 is the schematic top plan view of gas-liquid separator shown in Figure 1.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but the embodiment of the utility model does not limit therewith.
The liquid glucose evaporation structure of the utility model is as shown in Figure 1; Comprise central well down take 7, lower perforated plate 3 and low head 2 that last steam chest 10, upper perforated plate 8, axis that cylindrical shell 5 and barrel set gradually overlap with tubular axis from top to bottom; Central well down take 7 two ends are connected with lower perforated plate 3 with upper perforated plate 8 respectively; This liquid glucose evaporimeter also comprises the interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube 6 that the body two ends are connected with lower perforated plate 3 with upper perforated plate 8 respectively, and its pipeline section is to install by the anxious conical camber direction that expands the back convergent earlier by the tube fluid direction of motion.
Be provided with gas-liquid separator 9 in the last steam chest 10; Low head 2 bottoms are provided with tube side liquid glucose outlet 1; Also be provided with tube side liquid glucose inlet 13 on the casing replacing road, bottom of low head 2; Last steam chest 10 set inside have gas-liquid separator 9 (its view is shown in Fig. 6 and 7), and the top is provided with tube side indirect steam outlet 11, and the cylindrical shell outer setting between upper perforated plate 8 and the lower perforated plate 3 has shell side primary steam inlet 12; Cylindrical shell 5 also is provided with shell side condensation-water drain 4, and said shell side condensation-water drain 4 is close to lower perforated plate 3 tops.The cutaway view of liquid glucose evaporimeter is as shown in Figure 2.
Present embodiment liquid glucose evaporation structure is as implied above.Cylindrical shell 5 adopts 304 stainless steel materials, and diameter is Φ 2000x16mm, and height 2000mm is provided with in the cylindrical shell 5 and inserts spinning disk sharp expansion and accelerated flow converging-diverging tube 6 (its front view is as shown in Figure 3) in 1170.The body material is 304 stainless steel materials, and pipe range 2000mm, caliber D are Φ 45x3mm; Its contraction section length P2 is 8:1 with expansion segment length P1 ratio, and periodicity rib spacing (P1+P2) is 10 times of the dark e of rib, and the dark e of rib is 8% of caliber D; Along the cylindrical shell square arrangement; Tube pitch 58mm, downspout 7 calibers in axle center district are Φ 250x10mm, length 2000mm.In insert spinning disk sharp expansion and accelerated flow converging-diverging tube 6 and downspout 7 and all be connected with the tube sheet at two ends up and down; Spinning disk is (not shown among Fig. 1 in the interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube; The front view of spinning disk is as shown in Figure 4) evenly split at interval vertically; The length of spinning disk is 5 times of caliber, and the rate of turning round is 3, and the spinning disk spacing is 10 times of caliber.
Tube sheet adopts 304 stainless steel materials, and thickness is 60mm, and the last steam chest 10 that links to each other with tube sheet adopts 304 stainless steel materials, Φ 2000x16mm, height 1500mm.The gas-liquid separator 9 distance from bottom upper perforated plates surface 900mm that last steam chest 10 is built-in; Gas-liquid separator 9 is made up of 5 layers of herringbone strip in the opposite direction, 304 corrosion resistant plate combined liquid-proof layer 14 (as shown in Figure 5); The angle of herringbone strip metal plate resistance liquid layer 14 is 45 °; Plate width w is 50mm, and plate thickness is 2mm, the interfloor distance 20mm of adjacent person font strip metal plate resistance liquid layer.The low head 2 that is connected with lower perforated plate 3 adopts 304 stainless steel materials, Φ 2000x18mm, height 1000mm; Evaporimeter tube side liquid glucose exports 1 size Φ 180x10mm, is connected the bottom of low head 2, the tube side liquid glucose 13 size Φ 200x10mm that enter the mouth; Be connected on the ring set pipeline of low head 2 bottoms; The tube side indirect steam exports 11 size Φ 800x10mm and is connected with the top of last steam chest 10, and the shell side primary steam 12 size Φ 600x10mm that enter the mouth are connected with the centre position of cylindrical shell at last lower perforated plate; Shell side condensation-water drain 4 size Φ 150x10mm, with cylindrical shell be close to lower perforated plate 3 above be connected.
The operation principle of above-mentioned liquid glucose evaporimeter is:
Liquid glucose is got into the low head 2 of evaporimeter by tube side liquid glucose inlet 13; In the effect lower edge of evaporimeter liquid glucose heat transfer enhancement, insert in spinning disk sharp expansion and accelerated flow converging-diverging tube 6 pipes and upwards flow; In pipe, receive thermal evaporation; The indirect steam that produces separates the liquid foam that carries through last steam chest 10 with the Shanghai Automobile Factory indoor gas-liquid separator of putting 9, export 11 by the tube side indirect steam and draw, liquid glucose after evaporation and concentration by central well down take 7 backflows; A part is drawn by tube side liquid glucose outlet 1; Another part is back to the evaporation of low head 2 repetitive cycling, and primary steam is inserted between spinning disk sharp expansion and accelerated flow converging-diverging tube 6 pipes in being got into by shell side primary steam inlet 12, and condensed water is drawn by shell side condensation-water drain 4 after the heating liquid glucose.
The plain tube liquid glucose preheater of employing and the equal scale of present embodiment, equal material and physical dimension carries out the comparison of liquid glucose heat transfer property, and the liquid glucose preheater of slotting spinning disk sharp expansion and accelerated flow converging-diverging tube can improve heat transfer efficiency 45% in adopting.
Claims (8)
1. insert the liquid glucose evaporimeter of spinning disk sharp expansion and accelerated flow converging-diverging tube in adopting; Comprise central well down take (7), lower perforated plate (3) and low head (2) that last steam chest (10), upper perforated plate (8), axis that cylindrical shell (5) and barrel set gradually overlap with tubular axis from top to bottom; Central well down take (7) two ends are connected with lower perforated plate (3) with upper perforated plate (8) respectively; Be provided with gas-liquid separator (9) in the last steam chest (10); Low head (2) bottom is provided with tube side liquid glucose outlet (1); The ring set pipeline of low head (2) bottom also is provided with tube side liquid glucose inlet (13); Last steam chest (10) top is provided with tube side indirect steam outlet (11); Cylindrical shell outer setting between upper perforated plate (8) and the lower perforated plate (3) has shell side primary steam inlet (12) and shell side condensation-water drain (4), and said shell side condensation-water drain (4) is close to lower perforated plate (3) top, it is characterized in that also comprising the interior slotting spinning disk sharp expansion and accelerated flow converging-diverging tube (6) that the body two ends are connected with lower perforated plate (3) with upper perforated plate (8) respectively.
2. liquid glucose evaporimeter according to claim 1; It is characterized in that the said interior interior slotting spinning disk of inserting in the spinning disk sharp expansion and accelerated flow converging-diverging tube (6) evenly splits vertically at interval; The length of spinning disk is 1 times～15 times of caliber; The rate of turning round is 1～6, and the spinning disk spacing is 1 times～50 times of caliber.
3. liquid glucose evaporimeter according to claim 2 is characterized in that the said interior caliber size of inserting the spinning disk sharp expansion and accelerated flow converging-diverging tube is 20mm～70mm.
4. liquid glucose evaporimeter according to claim 3; It is characterized in that said interior anxious reamer shape curved surface length of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube (6) is 2 times～15 times of tapered conical curved surface length; Periodically rib spacing is dark 5 times～15 times of rib, and rib is 2%～10% of caliber deeply.
5. according to the described liquid glucose evaporimeter of one of claim 2 to 4, it is characterized in that the said interior pipeline section of inserting spinning disk sharp expansion and accelerated flow converging-diverging tube (6) is pressed anxious earlier expansion back convergent along the tube fluid direction of motion conical camber direction installation.
6. liquid glucose evaporimeter according to claim 5, it is characterized in that inserting in said spinning disk sharp expansion and accelerated flow converging-diverging tube (6) along the cylindrical shell annular region triangular in shape, square or annular array.
7. liquid glucose evaporimeter according to claim 6 is characterized in that said gas-liquid separator (9) is made up of multilayer herringbone strip metal plate resistance liquid layer (14) in the opposite direction.
8. liquid glucose evaporimeter according to claim 7; The angle that it is characterized in that said herringbone strip metal plate resistance liquid layer (14) is 30 °～120 °; The metallic plate width is 20mm～200mm; Plate thickness is 1mm～10mm, and the length of gas-liquid separator (9) is the inboard radial distance of last steam chest (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203324432U CN202237299U (en) | 2011-09-06 | 2011-09-06 | Sugar solution evaporator employing rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203324432U CN202237299U (en) | 2011-09-06 | 2011-09-06 | Sugar solution evaporator employing rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube |
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| Publication Number | Publication Date |
|---|---|
| CN202237299U true CN202237299U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203324432U Expired - Fee Related CN202237299U (en) | 2011-09-06 | 2011-09-06 | Sugar solution evaporator employing rotational flow sheet inserted sharp expansion and accelerated flow converging-diverging tube |
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| CN (1) | CN202237299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430248A (en) * | 2011-09-06 | 2012-05-02 | 华南理工大学 | Sugar liquid evaporator with sharp expansion and accelerated flow converging-diverging tubes inserted with twisted leaves |
| CN104784949A (en) * | 2015-04-02 | 2015-07-22 | 沈阳航空航天大学 | Special-shaped falling-film evaporation tube |
-
2011
- 2011-09-06 CN CN2011203324432U patent/CN202237299U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430248A (en) * | 2011-09-06 | 2012-05-02 | 华南理工大学 | Sugar liquid evaporator with sharp expansion and accelerated flow converging-diverging tubes inserted with twisted leaves |
| CN104784949A (en) * | 2015-04-02 | 2015-07-22 | 沈阳航空航天大学 | Special-shaped falling-film evaporation tube |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140906 |
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| EXPY | Termination of patent right or utility model |