CN102589267A - Pump-free spray dryer - Google Patents
Pump-free spray dryer Download PDFInfo
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- CN102589267A CN102589267A CN2011100260081A CN201110026008A CN102589267A CN 102589267 A CN102589267 A CN 102589267A CN 2011100260081 A CN2011100260081 A CN 2011100260081A CN 201110026008 A CN201110026008 A CN 201110026008A CN 102589267 A CN102589267 A CN 102589267A
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- liquid
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- powder
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Abstract
A spray drying method for preparing dry powder without pump conveying machinery and a hot air drying device is technically characterized in that superheated liquid is directly spray-dried by superheated steam pressure generated by the superheated liquid when heated by a closed pressure container. Namely, when the closed pressure container is used for heating the liquid to be superheated, the liquid can be pressed out of a spray device and sprayed into droplets by the superheated steam pressure generated by the superheated liquid, so that the dry powder is directly obtained without hot air for drying. Compared with a conventional process, the spray drying method has the advantages that the pump conveying machinery and the hot air drying device are omitted, equipment in different sizes can be optionally designed, and the spray drying method is particularly suitable for scattered self-employed laborers and laboratories.
Description
Technical field
The present invention is mainly used in food, medicinal material, pottery, glass and other can use the field of drying process with atomizing.
Technical background
Traditional spray drying process is to utilize the pressure of pump machines that aqueous material is sprayed into droplet through sprayer unit; Make droplet and hot-air generation exchange heat then; Hot-air makes the moisture in the droplet be able to evaporation, and the material in the droplet has lost the powder that moisture just becomes dried shape.
Summary of the invention
Method of the present invention is the container that can heat that aqueous material is placed airtight ability bearing certain pressure, and electricity consumption, combustion gas, coal or other fuel heat it, and the boiling point that makes its temperature surpass this liquid becomes superheated liquid and produces pressure.Utilize this superheated steam pressure that self produces to pass through sprayer unit then crossing hydrothermal solution material atomisation; And need not to carry the liquid material through the pump class; Also need not in the drying course to use the hot air dries device, but the heat that utilizes superheated liquid self to contain carries out drying.The process of spraying must be carried out in the powder gathering-device.Because material temperature when vessel in heating has surpassed the boiling point of this liquid, when it is sprayed into vaporificly when no longer being in pressurized state, contained humidity will evaporate rapidly and stay the powder of exsiccation in the droplet.At this moment powder temperature controls still that to maintain boiling point above and be difficult for absorbing moisture, has just obtained the dry mash of microspheroidal through the powder gathering-device.
When aqueous material being carried out spray-drying with spray drying process of the present invention; Because aqueous material places heating in the airtight pressure vessel; Its liquid material temperature has been heated to more than the boiling point of liquid before spraying, though at this moment the temperature of superheated liquid is still liquid state above its boiling point under the effect of closed container pressure; In a single day the liquid material extrudes sprayer unit and becomes droplet pressure and promptly disappear, and the liquid partial transient in the droplet just can flash to gaseous state from liquid state and stay the dry of powdery.Therefore the present invention need not use the pump machines of carrying the liquid material, need not use hot-air and droplet to carry out heat exchange yet, can obviously simplify and shorten dry run, is particularly conducive to the miniaturization of equipment.
Employed container must be airtight withstand voltage, so that make the liquid in the container become superheated liquid and produce pressure through heating.
To the material of some free settling layering, can be used on and carry out the uniformity that stirring method guarantees liquid material in the container in the container.
Employed liquid is generally water, can use alcohol and other suitable solvent to some special material.
Can also can directly carry out electrical heating to the container heating during heating to the aqueous material in the container.Must be able to show temperature and pressure in the container in the heating process.
In case of necessity can be to the pipeline heating before the sprayer unit outlet to strengthen thermal effect.
In case of necessity can be to the gatherer heating to prevent that droplet from gluing wall.
Can reclaim solvent in case of necessity.When the liquid that uses is water, after through sprayer, promptly flash to superheated steam, can design UTILIZATION OF VESIDUAL HEAT IN in case of necessity.
Description of drawings
In the accompanying drawing, the left side is a closed container, and container can heat, pressurize.Can also can directly heat the liquid material with electrical heating in the external container heating during heating at internal tank.Be to be heated to temperature required and mistake hydrothermal solution material pressure in the container, liquid material top is a superheated steam.The right side is the powder gathering-device.Mistakes hydrothermal solution material in the closed container sprays into the powder gathering-device through pipeline and sprayer unit under superheated steam pressure, the liquid flash evapn that droplet is interior and stay required dry mash.
The specific embodiment
1, the liquid material is added in the container and seal of vessel is good.
2, the liquid material is heated.The mode of heating can use electrical heating in the heating of the inside of liquid material, also can heat container with other fuel such as combustion gas, coal, faggots.Liquid material to easy sedimentation layering during heating should accompany by stirring, and container should be provided with the demonstration control of temperature and pressure simultaneously.
3, because container is airtight withstand voltage, temperature rising pressure rising simultaneously when the liquid material is heated.When material was heated to form hot and form certain pressure; Open spray valve; The superheated steam pressure of crossing hydrothermal solution material self generation when utilizing the pressure vessel heating extrudes sprayer unit atomisation thing with aqueous material, during spraying spray is sprayed in the powder gathering-device.Because this moment, the liquid material of ejection was hot, the liquid in the droplet stays flash evapn the dry powder substance of microspheroidal.
4, for strengthening the spray-drying effect, prevent that droplet from gluing wall, can consider in case of necessity gatherer is heated.Also can be before sprayer unit outlet increase to the heater of pipeline to strengthen thermal effect.
If the liquid in the 5 liquid material is organic solvents such as alcohol, then considered is recycled.If solvent is a water, after being sprayed into the droplet evaporation, then become superheated steam, the also recyclable in case of necessity waste heat that utilizes.
6, with the dry powder collecting packing in the powder gathering-device.
Claims (6)
1. spray drying process that need not to use pump class conveying machinery and hot air dries device.Also be a kind ofly to adopt airtight container heating to make the liquid in the container become overheated pulpous state liquid material, the superheated steam pressure that utilized hydrothermal solution material self to produce is carried the liquid material, directly will cross the method that hydrothermal solution material spray-drying prepares powder without hot air dries.
In order to the container that holds the liquid material must seal, withstand voltage and can heat.Pulpous state liquid material heats the temperature that makes liquid and surpasses the boiling point of liquid and become superheated liquid in airtight pressure vessel, at this moment superheated liquid self will produce certain pressure.The pressure that utilizes this superheated steam just can carry out spray-drying with crossing in the powder gatherer that the hydrothermal solution material is sprayed on normal pressure, is sprayed into that moisture in the mistake hydrothermal solution material of droplet shape will directly evaporate and the dry powder that stays microspheroidal.
3. heating is that the liquid material in the container is heated, and also can heat closed container.According to the different condition in powder process place, heating the employed energy can be electricity, combustion gas, coal, faggot or other fuel.
4. for strengthening drying effect, can heat to prevent that droplet from gluing wall gatherer in case of necessity.
5. made powder can be the material that can be dissolved in this liquid, also can be to be insoluble to this solution but abundant material crushed.
6. the liquid that is adopted can be water, and looking different material also can be other solvents such as alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100260081A CN102589267A (en) | 2011-01-17 | 2011-01-17 | Pump-free spray dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100260081A CN102589267A (en) | 2011-01-17 | 2011-01-17 | Pump-free spray dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102589267A true CN102589267A (en) | 2012-07-18 |
Family
ID=46478269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100260081A Pending CN102589267A (en) | 2011-01-17 | 2011-01-17 | Pump-free spray dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102589267A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4376010A (en) * | 1981-04-14 | 1983-03-08 | Noranda Mines Limited | Spray drying with a plasma of superheated steam |
| US5615492A (en) * | 1993-06-26 | 1997-04-01 | Henkel Kommanditgesellschaft Auf Aktien | Drying of water-containing useful materials or mixtures thereof with superheated steam |
| CN2757889Y (en) * | 2004-05-17 | 2006-02-15 | 张成武 | Small size spray drying machine for laboratory |
| CN101327378A (en) * | 2008-07-09 | 2008-12-24 | 史祖法 | Method for preparing powder by sponging drying method for superheated liquid |
-
2011
- 2011-01-17 CN CN2011100260081A patent/CN102589267A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4376010A (en) * | 1981-04-14 | 1983-03-08 | Noranda Mines Limited | Spray drying with a plasma of superheated steam |
| US5615492A (en) * | 1993-06-26 | 1997-04-01 | Henkel Kommanditgesellschaft Auf Aktien | Drying of water-containing useful materials or mixtures thereof with superheated steam |
| CN2757889Y (en) * | 2004-05-17 | 2006-02-15 | 张成武 | Small size spray drying machine for laboratory |
| CN101327378A (en) * | 2008-07-09 | 2008-12-24 | 史祖法 | Method for preparing powder by sponging drying method for superheated liquid |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120718 |