CN104784947A - Surface local heating-based liquid evaporation method - Google Patents
Surface local heating-based liquid evaporation method Download PDFInfo
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- CN104784947A CN104784947A CN201510198891.0A CN201510198891A CN104784947A CN 104784947 A CN104784947 A CN 104784947A CN 201510198891 A CN201510198891 A CN 201510198891A CN 104784947 A CN104784947 A CN 104784947A
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Abstract
The invention relates to a surface local heating-based liquid evaporation method. According to the method, a floating heat source is adopted; the heat source is located on the surface of the liquid; by adopting a surface local heating manner, the liquid surface is heated to the boiling point without heating all the liquid to the boiling point, so that the liquid evaporation is realized. Compared with the prior art, the surface local heating-based liquid evaporation method has the advantages of being easy to get and quick to heat, is particularly suitable for the application occasions of large-scale liquid evaporation, such as large-scale steam boilers and the like, and is high in energy utilization rate and high in evaporation speed.
Description
Technical field
The present invention relates to thermal evaporation techniques field, especially relate to a kind of liquid evaporation based on surperficial local heat.
Background technology
Liquid evaporation is the way utilizing heating, and heating liquid is produced boiling phenomenon to boiling point and forms steam, the application of this technology is very extensive.Such as, steam boiler utilizes evaporation to produce a large amount of vapours to carry out heat supply or to provide driving force exactly.In the first time industrial revolution, watt has produced First to evaporate the steam engine that the vapours of generation is driving force, has greatly liberated the productivity of the mankind.In the cylinder of internal combustion engine in modern times, thermal evaporation impels fuel and air to carry out mixing thus reaching Thorough combustion.Equally, efficient thermal evaporation also contributes to improving power plant generating efficiency, strengthens the heat transfer performance of phase transformation heat transfer system.In addition, weak solution concentrates, solute crystallization, distilation, the field such as desalinization be also the category that evaporation technique is often utilized.
Current evaporation technique is all utilize various thermal source to heat container bottom or wall that liquid is housed, overheated heating or between wall and internal liquid, heat exchange occurs, make internal liquid reach boiling point by thermal convection current and seethe with excitement, producing a large amount of steam.This overall mode of heating could produce steam after needing that all liq in container is heated to boiling point, have a large amount of heats by liquid and container in this process absorb, cause the waste of heat energy.Meanwhile, bottom-heated mode requires that overheated liquid bubble arrives the interface of liquid-to-air through the motion of long-distance from bottom, and steam could be escaped.This bottom-heated design causes current evaporation technique to there is low-response, the low inferior shortcoming of evaporation efficiency.
Summary of the invention
Object of the present invention is exactly provide a kind of to avoid because evaporation and the liquid level fluctuation that causes makes thermal source depart from liquid surface to overcome defect that above-mentioned prior art exists, achieves the liquid evaporation based on surperficial local heat of controlled long-time evaporation.
Object of the present invention can be achieved through the following technical solutions:
A kind of liquid evaporation based on surperficial local heat, adopt floating type thermal source, this thermal source is positioned at the surface of liquid, adopt the mode of surperficial local heat that liquid surface is heated to boiling point, all liq is not needed to be heated to boiling point, realize the evaporation of liquid, effectively improve heat utilization rate and liquid evaporation efficiency.
Described floating type thermal source directly contacts with liquid surface, is partially or completely immersed in liquid, keeps thermal source to be within the scope of liquid surface.
Described floating type thermal source declines with liquid level and slowly declines, and remains on the surface of liquid.
Described floating type thermal source passes through buoyancy or the external equipment control of liquid, remains on the surface of liquid.
Described floating type thermal source adopts electrical heating, fuel heating or other modes to heat, and this kind of mode of heating has and is easy to obtain, and heats advantage rapidly, is particularly useful for the steam boiler etc. that the application scenario of mass liquid evaporation is such as large-scale.
The surface of described floating type thermal source is netted or vesicular texture, can carry out local heat fast to liquid, and steam can be made again to depart from liquid level fast.
Described liquid is water, the neat liquid of organic solvent or mixed solution.
This efficient liquid evaporation technique based on surperficial local heat, compared with traditional liquid evaporating technology, it is advantageous that: traditional liquid evaporation, be generally at container bottom, because the thermal convection current of liquid exists, hydrothermal solution floats, cold liquid declines, the heating process that the boiling point reaching liquid needs experience one very long, not only wastes heat energy, and consumes a large amount of time.And this technology directly adopts the mode of liquid surface local heat to carry out evaporating liquid, the impact of thermal convection current is very little, and without the need to by whole heating liquid, heat is concentrated at liquid level, substantially increases evaporation efficiency.Meanwhile, this technology adopts floating type thermal source, avoids the liquid level fluctuation caused because of evaporation and makes thermal source depart from liquid surface, achieve controlled long-time evaporation.In addition, the source of this technology to heat there is no particular/special requirement, can adopt electrical heating, fuel combustion etc.This technology adopts the mode of surperficial local heat, reaches the object of rapidly and efficiently evaporating liquid, in the commercial Application of reality, has broad application prospects.
Accompanying drawing explanation
The evaporation rate comparison diagram that Fig. 1 is electrical heating power when being 5W;
The evaporation rate comparison diagram that Fig. 2 is electrical heating power when being 9W;
The evaporation rate comparison diagram that Fig. 3 is fuel heating power when being 7W.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Get a 100ml beaker, load about 80ml deionized water, be placed on electronic balance.Customized porous electric heating sheets is swum on the liquid level in beaker, then the electrode of electric heating sheets is received on adjustable power of direct current.
The FPDP of electronic balance is received on computer, opens logging software, set the registration that every five seconds reads primary electron balance.
After all preparations are ready, open adjustable power of direct current, regulation output power, to 5W, is clicked computer software simultaneously and is started to record data, close dc source, and derive the evaporation data of computer record after 40 minutes.
Repeat previous step, evaporation data when measurement power output is 9W.
Comparative example 1
In order to the advantage of protuberate local heat in liquid evaporation, we have also carried out the contrast experiment of a series of bottom-heated.
Get a 100ml beaker, load about 80ml deionized water, be placed on electronic balance.Customized porous electric heating sheets is immersed into the bottom of beaker, then the electrode of electric heating sheets is received on adjustable power of direct current.
The FPDP of electronic balance is received on computer, opens logging software, set the registration that every five seconds reads primary electron balance.
After all preparations are ready, open adjustable power of direct current, regulation output power, to 5W, is clicked computer software simultaneously and is started to record data, close dc source, and derive the evaporation data of computer record after 40 minutes.
Repeat previous step, evaporation data when measurement power output is 9W
By the process to above-mentioned experiment evaporation data, we obtain the Data Comparison figure in accompanying drawing.
Fig. 1 display be heating power be 5W time surface heating and the evaporation rate comparison diagram of bottom-heated, as can be seen from the figure, within 40 minutes, inner surface heating evaporation has fallen about 2.1 grams of deionized waters, and bottom-heated has only evaporated about 0.6 gram of deionized water, and difference is very large.
Fig. 2 display be heating power be 9W time surface heating and the evaporation rate comparison diagram of bottom-heated, as can be seen from the figure, the evaporation capacity difference of two kinds of mode of heatings is still very large, surface heated evaporation capacity is about 3 times of bottom-heated evaporation capacity, shows that the evaporation efficiency of surperficial local heat will be far superior to bottom-heated mode.
Embodiment 2
Using the heat of fuel combustion generation as the thermal source of surperficial local heat, heat is delivered to by the surface of evaporating liquid by the heat pipe with high thermal conductivity, utilizes the effect of buoyancy to make heat pipe remain on liquid level place simultaneously.The heat energy of burning release is transmitted to rapidly the liquid on surface, makes it reach boiling point, rapid evaporation.Compared to base burning heating, this technology has evaporation and responds fast, evaporation efficiency advantages of higher.Adopt the experimental provision identical with embodiment 1, surperficial local heat thermal source is replaced by fuel heating, carries out contrast evaporation experiment.Fig. 3 display be fuel heating power be 7W time surface heating and bottom-heated evaporation rate comparison diagram.Can find, similar with electrical heating, the evaporation rate of the surperficial local heat that the present invention proposes and the response of evaporation are all far above tradition bottom mode of heating.
Claims (7)
1. based on a liquid evaporation for surperficial local heat, it is characterized in that, the method adopts floating type thermal source, this thermal source is positioned at the surface of liquid, adopt the mode of surperficial local heat that liquid surface is heated to boiling point, do not need all liq to be heated to boiling point, realize the evaporation of liquid.
2. a kind of liquid evaporation based on surperficial local heat according to claim 1, is characterized in that, described floating type thermal source directly contacts with liquid surface, is partially or completely immersed in liquid, keeps thermal source to be within the scope of liquid surface.
3. a kind of liquid evaporation based on surperficial local heat according to claim 1 and 2, is characterized in that, described floating type thermal source declines with liquid level and slowly declines, and remains on the surface of liquid.
4. a kind of liquid evaporation based on surperficial local heat according to claim 3, is characterized in that, described floating type thermal source passes through buoyancy or the external equipment control of liquid, remains on the surface of liquid.
5. a kind of liquid evaporation based on surperficial local heat according to claim 1, is characterized in that, described floating type thermal source adopts electrical heating, fuel heating or other modes to heat.
6. a kind of liquid evaporation based on surperficial local heat according to claim 1, is characterized in that, the surface of described floating type thermal source is netted or vesicular texture.
7. a kind of liquid evaporation based on surperficial local heat according to claim 1, is characterized in that, described liquid is water, the neat liquid of organic solvent or mixed solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510198891.0A CN104784947A (en) | 2015-04-22 | 2015-04-22 | Surface local heating-based liquid evaporation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510198891.0A CN104784947A (en) | 2015-04-22 | 2015-04-22 | Surface local heating-based liquid evaporation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591833A (en) * | 2020-11-30 | 2021-04-02 | 湖北文理学院 | Local heating type seawater desalination device with multiple energy mechanisms |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388911A (en) * | 1979-12-13 | 1983-06-21 | Daimler-Benz Aktiengesellschaft | Apparatus for producing a defined fuel vapor-air mixture for gasoline internal combustion engines |
| JPH01107883A (en) * | 1987-10-21 | 1989-04-25 | Mitsubishi Heavy Ind Ltd | Solar thermal fresh water generator |
| CA2416501A1 (en) * | 2003-01-17 | 2004-07-17 | Leo Francois Blais | Floating insulated solar heating panel |
| WO2010042971A1 (en) * | 2008-10-13 | 2010-04-22 | Wasabi (Holdings) Pty Ltd | Liquid evaporation system |
-
2015
- 2015-04-22 CN CN201510198891.0A patent/CN104784947A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388911A (en) * | 1979-12-13 | 1983-06-21 | Daimler-Benz Aktiengesellschaft | Apparatus for producing a defined fuel vapor-air mixture for gasoline internal combustion engines |
| JPH01107883A (en) * | 1987-10-21 | 1989-04-25 | Mitsubishi Heavy Ind Ltd | Solar thermal fresh water generator |
| CA2416501A1 (en) * | 2003-01-17 | 2004-07-17 | Leo Francois Blais | Floating insulated solar heating panel |
| WO2010042971A1 (en) * | 2008-10-13 | 2010-04-22 | Wasabi (Holdings) Pty Ltd | Liquid evaporation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112591833A (en) * | 2020-11-30 | 2021-04-02 | 湖北文理学院 | Local heating type seawater desalination device with multiple energy mechanisms |
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Application publication date: 20150722 |
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