CN1239677A - Film forming device utilizing vacuum evaporation of high-concentration material liquid - Google Patents
Film forming device utilizing vacuum evaporation of high-concentration material liquid Download PDFInfo
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- CN1239677A CN1239677A CN 99116259 CN99116259A CN1239677A CN 1239677 A CN1239677 A CN 1239677A CN 99116259 CN99116259 CN 99116259 CN 99116259 A CN99116259 A CN 99116259A CN 1239677 A CN1239677 A CN 1239677A
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Abstract
The present invention relates to evaporating concentration technology and the film forming device which is used in multi-effect falling-film vacuum evaporation of high-concentration and high-viscosity thermosensitive material in light industry, food production, pharmaceutical, fine chemical and other industry. One support connects the upper and the lower distribution plates to constitute one integral double-layer distibution plate with the upper distribution plate having bore size greater than that of the lower one. Without the demerits of inhomogeneous material liquid distribution which exist in proir film forming device, the film forming device has ideal film forming effect, high heat transfer efficiency, obvious energy-saving effect and simple structure.
Description
The present invention relates to evaporation concentration technique, specifically be meant industries such as being used for light industry, food, starch sugar, medicine, fine chemistry industry, the film formation device of the multiple-effect falling film vacuum evaporation of high concentration, high viscosity, heat sensitive material.
Over past ten years, the researcher of states such as Germany, Japan, the U.S., Denmark has obtained bigger progress at the aspects such as reinforcement that falling film evaporation concentrates heat-transfer mechanism and diabatic process, and theoretical monograph is delivered in succession.In recent years multiple-effect falling film vacuum evaporation enrichment facility approved product comes out, and realizes the equipment integral self-control, has been widely used in the evaporating concentration process of industry feed liquids such as light industry, food, starch sugar, medicine, fine chemistry industry at present.Its principle is that feed liquid is added by the heater top, after film formation device distributes, be membranaceous decline at gravity and vacuum action lower edge heating tube inwall, heating tube divides two sections of preheating section and evaporator sections, feed liquid is warming up to evaporating temperature at preheating section, and in the evaporator section evaporation and concentration, the feed liquid after concentrating is separated at separator with the indirect steam mixture, feed liquid enters next effect and continues to concentrate, and indirect steam is as the heating steam of next effect.Multiple-effect falling film vacuum evaporation concentration systems has advantages such as evaporation rate is fast, evaporation intensity is high, energy utilization rate is high, temperature is low, the time of staying is short, performance is good.
But, at present to multiple-effect falling film vacuum evaporation concentration systems, the emphasis of countries in the world research all is placed on the optimization coupling of whole system and controls automatically, the but deep research of shortage system of film formation device that diabatic process is played a crucial role, the individual layer distribution disc type film formation devices that adopt more, as shown in Figure 1 and Figure 2, be the porous disc structure, be welded with high 1～2 centimetre short tube-overflow pipe on each hole, the dish periphery is high 2～3 centimetres, the aperture is bigger, is 0.98～1.02d (d is the heating tube caliber), and hole and heating tube mate one by one.Material enters heater by feed pipe, forms a liquid layer between the periphery of film formation device and overflow pipe, and liquid level surpasses overflow pipe after the pore overflow enters heating tube, the start vaporizer concentration process.Because adopt individual layer distribution tray type structure, feed liquid is directly impacted distributing disc, causes the part feed liquid not form liquid layer and enters heating tube with regard to direct short-circuit by the overflow pore, the feed liquid skewness.Because the overflow pipe aperture is big, and this influence is more obvious, the middle part heating tube feed liquid flow relative with feed pipe is excessive simultaneously, film-formation result is undesirable, and heat-transfer effect is poor, and the heating tube feed liquid flow of periphery is too small, easily feed liquid is burnt, cause " burnt pipe " problem and influence product quality.On distributing disc, weld many overflow pipes simultaneously, the specification requirement height, difficulty of processing is big.These have all directly influenced promoting the use of of multiple-effect falling film vacuum evaporation concentration systems.In addition, domestic two effects and the triple effect falling liquid film vacuum evaporation concentration systems that adopts in recent years mostly is Japan, Germany introduces, and has the DOMESTICATION PROBLEM of this equipment.
The objective of the invention is to overcome the deficiency of existing traditional and film formation device import, be modified into the film device structure, to solve the feed liquid skewness that individual layer distribution disc type film formation device exists and " burnt pipe " problem of bringing thus, provide a kind of energy utilization rate height, film-formation result is good, production cost is lower and the film formation device and the installation method thereof of the utilizing vacuum evaporation of high-concentration material liquid that is easy to apply at home.
The present invention has designed a kind of double-deck board-like film formation device that distributes to substitute individual layer distribution disc type film formation device of the prior art, it be one by support with the upper and lower distribution grid double-deck distribution grid of all-in-one-piece that is fixedly connected; The aperture of last distribution plate orifices is greater than the aperture of following distribution plate orifices, when the heating tube caliber was d, last distribution plate orifices aperture was 0.18～0.25d, and following distribution plate orifices aperture is 0.08～0.15d, last distribution grid percent opening is 16～25%, and following distribution grid percent opening is 12～20%; Be welded with the handle of being convenient to clean the maintenance loading and unloading on the last distribution grid; Its level, be movably arranged on heating tube top.
The present invention compares with individual layer distribution disc type film formation device has following outstanding advantage:
1. adopt double-deck distributing plate structure, feed liquid is carried out quadratic distribution, and to the aperture and the percent opening of distribution grid are optimized up and down, the aperture is little, hole count is many (be about distribution disc type film formation device 18～35 times), feed liquid distributes very evenly, and has solved the feed liquid skewness that adopts individual layer distribution disc type film formation device to exist satisfactorily and has reached " burnt pipe " problem of bringing thus.
2. film-formation result ideal, heat transfer efficiency greatly improves, and steam mono-consumption (ton steam/ton evaporation water) reduces to 0.38～0.41 by 0.43～0.46 of distribution disc type film formation device, has descended more than 10%, and energy-saving effect is very obvious.
3. this apparatus structure is simple, and processing and manufacturing is easy, is easy to promote the use of, and is specially adapted to the evaporating concentration process of industry feed liquids such as domestic light industry, food, starch sugar, medicine, fine chemistry industry;
4. adopt this plant energy consumption low, production cost reduces relatively, and the economic benefit prospect is good;
5. this device is a movable structure, is easy to cleaning and maintenance etc.
Fig. 1 is an individual layer distribution disc type film formation device structural representation;
Fig. 2 cuts open figure for the A-A of Fig. 1;
Fig. 3 is the film formation device structural representation of utilizing vacuum evaporation of high-concentration material liquid;
Fig. 4 is the vertical view of Fig. 3, promptly goes up the distributing plate structure schematic diagram;
Fig. 5 promptly descends the distributing plate structure schematic diagram for the A-A of Fig. 3 cuts open figure;
Fig. 6 is the film formation device scheme of installation of utilizing vacuum evaporation of high-concentration material liquid.
The present invention is described in further detail by following examples and accompanying drawing thereof:
As shown in Figure 3, the film formation device of utilizing vacuum evaporation of high-concentration material liquid by last distribution grid 2, down distribution grid 4, upper and lower distribution grid 2 and 4 supports that are fixedly connected 3 and handle 1 are formed.Offer distribution plate orifices 5 on the last distribution grid 2 shown in Figure 4, offer down distribution plate orifices 6 on the following distribution grid 4 shown in Figure 5, the aperture of last distribution plate orifices 5 is greater than following distribution plate orifices 6.During design, take all factors into consideration feed liquid and distribute and fluid resistance, to the aperture and the percent opening of distribution grid are optimized up and down.When heating tube 8 calibers were d, last distribution plate orifices aperture was 0.18～0.25d, and following distribution plate orifices aperture is 0.08～0.15d; Last distribution grid percent opening is 16～25%, and following distribution grid percent opening is 12～20%.Last distribution grid 2 and following distribution grid 4 are connected as one by support 3 and equally distributed pad 7, are welded with the handle 1 of being convenient to clean the maintenance loading and unloading on the last distribution grid 2.As shown in Figure 6, double-deck board-like film formation device 10 levels that distribute, be movably arranged on even distribution and with the backing plates 9 of multiple-effect falling film vacuum evaporator inner housing 11 fixing welding on.Material enters the film formation device of utilizing vacuum evaporation of high-concentration material liquid by feed pipe 12, after last distribution grid carries out distributing the first time, enters down distribution grid and carries out quadratic distribution, enters heating tube again, the start vaporizer concentration process.Because the aperture is little, hole count is many (be about distribution disc type film formation device 18～35 times), carry out quadratic distribution simultaneously, feed liquid distributes very evenly, and has solved the feed liquid skewness that adopts individual layer distribution disc type film formation device to exist satisfactorily and has reached " burnt pipe " problem of bringing thus.
Claims (4)
1. the film formation device of a utilizing vacuum evaporation of high-concentration material liquid, it is characterized in that it be one by support (3) with upper and lower distribution grid (2) and (4) the double-deck distribution grid of all-in-one-piece that is fixedly connected; The aperture of last distribution plate orifices (5) is greater than the aperture of following distribution plate orifices (6).
2. the film formation device of a kind of utilizing vacuum evaporation of high-concentration material liquid according to claim 1 is characterized in that last distribution plate orifices aperture is 0.18～0.25d when heating tube (8) caliber is d, and following distribution plate orifices aperture is 0.08～0.15d.
3. according to the film formation device of claim 1,2 described a kind of utilizing vacuum evaporation of high-concentration material liquid, it is characterized in that the distribution grid percent opening is 16～25%, following distribution grid percent opening is 12～20%.
4. the film formation device of a utilizing vacuum evaporation of high-concentration material liquid is characterized in that its level, is movably arranged on the heating tube top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116259A CN1086594C (en) | 1999-06-28 | 1999-06-28 | Film forming device utilizing vacuum evaporation of high-concentration material liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99116259A CN1086594C (en) | 1999-06-28 | 1999-06-28 | Film forming device utilizing vacuum evaporation of high-concentration material liquid |
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| Publication Number | Publication Date |
|---|---|
| CN1239677A true CN1239677A (en) | 1999-12-29 |
| CN1086594C CN1086594C (en) | 2002-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99116259A Expired - Fee Related CN1086594C (en) | 1999-06-28 | 1999-06-28 | Film forming device utilizing vacuum evaporation of high-concentration material liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600627A (en) * | 2011-12-23 | 2012-07-25 | 安徽国孚润滑油工业有限公司 | Cyclone-flash cloth-film-reboiling-type heat-pipe distiller |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451495C (en) * | 2007-05-10 | 2009-01-14 | 上海交通大学 | Refrigerant uniform distributor of compression refrigeration falling-film evaporator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4572287A (en) * | 1983-04-04 | 1986-02-25 | Chicago Bridge & Iron Company | Falling film heat exchanger with film forming members |
| CN2052682U (en) * | 1988-09-23 | 1990-02-14 | 王风岐 | External flow and free droping membrance plate type evaporator |
| CN2054369U (en) * | 1989-06-15 | 1990-03-14 | 天津大学 | Low-resistance dispersing type falling film liquid distributing unit |
| CN2164308Y (en) * | 1993-07-10 | 1994-05-11 | 河北工学院 | Material liquid film forming device for falling-film evaporator |
| CN2195251Y (en) * | 1994-07-18 | 1995-04-26 | 张艳 | Chair for infants |
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1999
- 1999-06-28 CN CN99116259A patent/CN1086594C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102600627A (en) * | 2011-12-23 | 2012-07-25 | 安徽国孚润滑油工业有限公司 | Cyclone-flash cloth-film-reboiling-type heat-pipe distiller |
| CN102600627B (en) * | 2011-12-23 | 2014-03-12 | 安徽国孚润滑油工业有限公司 | Cyclone-flash cloth-film-reboiling-type heat-pipe distiller |
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| CN1086594C (en) | 2002-06-26 |
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