CN102226630A

CN102226630A - Natural energy drying system

Info

Publication number: CN102226630A
Application number: CN2011101083686A
Authority: CN
Inventors: 冯益安
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-10-26

Abstract

The invention relates to a natural energy drying system, belonging to the field of energy-saving drying. The existing vacuum drying technology consumes massive energy such as electrical heating, steam, fire coal or fuel oil and solar energy, namely the energy consumption is high in the drying industry, and the invention aims at solving the energy consumption problem during drying by utilizing natural energy. The invention comprises: a heat exchanger is added to absorb waste heat sources such as normal-temperature normal-pressure air, running water and waste heat of a factory in natural world. The heat exchanger added in the invention is a large-area air cooling fin, the cooling fin is respectively contacted with the air in a large area inside and outside a vacuum container, or a set of medium circulating pipes penetrate through the inner cavity of the vacuum container to achieve the aim of rapidly exchanging heat, wherein the medium circulating pipes are metal circulating pipelines which are connected in series, and air or water is introduced into the pipelines. By adopting the manner, the heat conversion efficiency is higher, no conventional energy source is consumed, a real energy-saving drying device is realized, and the advantage that a vacuum dryer can realize rapid drying is remained.

Description

The natural energy drying system

Technical field: energy-saving drying

Background technology:

The vacuum drying technique rate of drying is fast, power consumption is big, equipment cost is high, end product quality is high.

Summary of the invention:

Vacuum drying technique needs a large amount of power consumptions at present, such as have need electrical heating, the needs fire coal that needs steam, has that has or fuel oil, have need solar energy, the whole power consumption of dry in a word industry is huge, when being water evaporates, reason can draw a large amount of heats, vacuum drying has solved the dry speed and the quality problems of dry finished product, but still can not reduce for power consumption.The present invention is exactly the substitution problem that solves conventional energy resource in the drying.

Summary of the invention is: draw natural discarded thermal source by increasing a heat exchanger, comprise natural normal temperature and pressure air, normal temperature running water, the discarded waste heat of factory etc.When the vacuum tank internal pressure is lower than normal pressure, temperature in the vacuum tank is lower than the temperature of ambient atmosphere, the big more temperature difference of pressure differential is just big more, as long as the heat exchanger that increases to vacuum tank has enough heat exchange areas and medium circulation speed, just can from surrounding air, absorb heat fully and reach rapid evaporation and quick-drying purpose, therefore the heat exchanger of the present invention's increase is the large tracts of land air-cooling fin, described fin contacts with the air large tracts of land respectively at the inside and outside of vacuum tank, perhaps pass the vacuum tank inner chamber and reach quick heat exchange purpose by a cover medium circulation pipe, described medium circulation pipe is series connection metal circulating line, bubbling air or water in the pipeline.Because this mode thermal transition efficient is higher, does not consume conventional energy resource, is real energy-saving drying device, keeping vacuum desiccator simultaneously can quick-drying advantage.

Description of drawings

Accompanying drawing 1 is the structural representation of natural energy drying device.Fig. 2 is the natural energy drier vertical view with circulation pipe structure.Fig. 3 is that the natural energy drier with circulation pipe structure is faced planing surface figure.Fig. 4 is the natural energy drier easy structure schematic diagram with fin device.Wherein 1, vacuum tank inner chamber; 2, baking zone; 3, air exhauster; 4, Pressure gauge; 5, equilibrated valve; 6, shell; 7, vertical circulation interface; 8, circulation pipe; 9, medium circulation pipe import; 10, medium circulation pipe outlet; 11, offside vertical duct; 12, nearside vertical duct; 13, fin.

The specific embodiment

Once illustrate in conjunction with the accompanying drawings:

Fig. 1 is structural framing figure, comprise vacuum tank (1), baking zone (2), air exhauster (3), Pressure gauge (4), balanced valve (5) and shell (6), wherein the ratio of cavity pressure and ambient pressure is generally less than 100 in the vacuum tank, is far smaller than " vacuum " degree of conventional vacuum container.Wherein said air exhauster power power under the condition that vacuumizes with specific volume is less, so that reach balance for a short time at less power, such as 50W, 100W, 200W etc.The effect of balanced valve (5) is to limit the force value of vacuum lumen (1), and pressure difference value is too big, and balanced valve is opened, and purpose is to allow the interior sudden changes in pressure of vacuum lumen (1) cause the explosion of drying article too greatly.The effect of shell (6) is to support and heat exchange.But Fig. 1 is easy structure figure, and shell (6) rate of heat exchange is also unhappy, so can influence drying rate, therefore Fig. 2, Fig. 3, the designed Rapid Thermal switch mode of Fig. 4 is arranged.

Fig. 2 and Fig. 3 utilize the circulation pipe pattern to carry out the structural representation of heat exchange.Wherein Fig. 2 is a vertical view, and Fig. 3 is a front view.In Fig. 2, medium (such as air) is entered by medium circulation pipe import (9), circulation in circulation pipe (8), connect countermeasure vertical duct (11) by vertical circulation pipe interface (7) and enter last layer circulation pipe (8), enter last layer circulation pipe (8) by nearside vertical duct (12) again after the circulation ... and the like, until being discharged to the external world by medium circulation mouth (10).This kind circulation be circulation pipe metallic walls can and the interior drying article of vacuum lumen (1) carry out heat exchange, be convenient to drying article and absorb under low-temp low-pressure relatively more that low-temperature heat quantity evaporates, thereby reach the oven dry purpose.This circulation can be provided by wind-force or electric power for the small-power power cycle, also can be provided by manpower, such as hand-rail type.Medium circulation pipe import (9) and medium circulation pipe outlet (10) can be exchanged.Wherein air outlet slit is a cold air, and can feed in the room and use as air-conditioning summer.Be from ambient atmosphere, to absorb heat energy during medium circulation pipe inner circulating air, if in the medium circulation pipe (8) circulation be running water, then be draw heat from running water, also can feed waste water in the factory, electric field waste heat particularly, effect is more obvious.

Fig. 4 is the natural energy drying equipment easy structure schematic diagram with fin.Usually do not having under the situation of heat exchanger, as long as air exhauster (3) operation, pressure in the vacuum lumen (1) reduces, temperature reduces, nature can absorb heat by vacuum tank wall (6), impel the water evaporates of vacuum inner drying article, but the heat transfer rate is slow for the vacuum tank wall, can influence drying rate, so need add fin shown in Figure 4 (13), fin (a 13) part embeds in the vacuum lumen (1), a part is exposed in the air, and in vacuo the partial function in chamber (1) is " heat radiation ", is exposed to airborne partial function and is " heat absorption ", promptly absorb airborne heat, if fin is placed on the heat that just absorbs in the water in the water.This dryer is placed on and indoorly can reduces indoor temperature summer, plays the air-conditioning effect.

Claims

1. the natural energy drying system is a kind of low-pressure energy-saving drying, comprise vacuum tank, vavuum pump, heat exchanger and heating power source, it is characterized in that: vavuum pump replaces with general air exhauster, heat exchanger is air-cooling fin or circulation pipe, and the heating power source is from natural normal temperature and pressure air or normal temperature running water or discarded thermal source.

2. a kind of natural energy drying system according to claim 1, wherein heat exchanger is the medium circulation pipe partly, it is characterized in that medium circulation pipe import (9) and medium circulation pipe export (10) and can exchange.

3. according to claim 1 and claim 2 described a kind of natural energy drying systems, what it is characterized in that the interior circulation of medium circulation pipe (8) is the discarded thermal source of water or factory of air or natural temperature.

4. a kind of natural energy drying system according to claim 1, wherein heat exchanger is a fin partly, it is characterized in that the part of fin embeds in the vacuum lumen (1), another part is exposed in the air.

5. a kind of natural energy drying system according to claim 1, air exhauster (3) power resources are in wind-force.

6. a kind of natural energy drying system according to claim 1 is characterized in that feed indoor as " air-conditioning " use that reduces indoor air temperature summer to the cold air that drying equipment is placed on medium circulation pipe (8) discharge of indoor or drying equipment.