DE573417C - Process for the operation of drying plants - Google Patents
Process for the operation of drying plantsInfo
- Publication number
- DE573417C DE573417C DE1930573417D DE573417DD DE573417C DE 573417 C DE573417 C DE 573417C DE 1930573417 D DE1930573417 D DE 1930573417D DE 573417D D DE573417D D DE 573417DD DE 573417 C DE573417 C DE 573417C
- Authority
- DE
- Germany
- Prior art keywords
- drying
- water
- dry material
- drying plants
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
- F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Description
Verfahren zum Betriebe von Trockenanlagen Diejenigen Trocknungsverfahren, bei denen der zu trocknende Rohstoff in einen Strom von heißer Luft, heißen Verbrennungsgasen, überhitztem Dämpf oder in Gemische derselben eingetragen und in diesem Strom bis zur vollendeten Trocknung in der Schwebe gehalten wird, verlaufen mit solcher Geschwindigkeit, daß ein gleichmäßiger Trocknungsgrad nur bei genauer Aufrechterhaltung des Beharrungszustandes der Trockenanlage bezüglich .der Rohstoff- und Wärmezufuhr erreichbar. ist. Dementsprechend konnte bisher .bei der Inbetriebsetzung und beim Abstellen derartiger Anlagen der, gewünschte Trocknangsgrad nicht' eingehalten werden.Process for the operation of drying systems Those drying processes, where the raw material to be dried is in a stream of hot air, hot combustion gases, superheated vapor or in mixtures thereof entered and in this stream up is held in suspension for complete drying, run at such a speed, that a uniform degree of drying is only possible if the steady state is precisely maintained the drying system with regard to the supply of raw materials and heat. is. Accordingly was previously able to, when commissioning and shutting down such systems, Desired degree of dryness cannot be maintained.
Werden Trockenanlagen der genannten Art in der ihnen eigentümlichen, wärmewirtschaftlich besonders vorteilhaften Weise bei hohen Temperaturen und mit hoher Durchsatzleistung betrieben, so müssen nach dem Vorgesagten beim An- und Abstellen der An-Iage sowie bei gelegentlichem Aussetzen der Rohstoffzufuhr große Mengen von unter-bzw. übertrocknetem Endstoff anfallen. Bei ungewollten Unterbrechungen der Zufuhr des Trockengutes besteht außerdem die Gefahr der Beschädigung der Vorrichtung, da die von der Heizquelle in die Trockenvorrichtung gelangende Wärme in solchen Fällen nicht zur Wasserverdampfung aus dem Trockengut verbraucht wird, vielmehr im vollen Umfang gegen die Wände der Vorrichtung bzw. gegen deren kostspielige Auskleidung gerät.Are drying systems of the type mentioned in the peculiar to them, heat-economically particularly advantageous way at high temperatures and with operated with a high throughput, so must according to the above when switching on and off the plant as well as with occasional interruption of the raw material supply large amounts of under or. overdried end product accumulate. In the event of unintentional interruptions in the In addition, there is a risk of damage to the device when the dry material is fed in, because the heat coming from the heating source into the drying device is in such Cases are not used to evaporate water from the dry material, rather fully against the walls of the device or against its expensive lining device.
Die genannten Schwierigkeiten können nach der Erfindung mit besonderem Vorteil bei den hohen Anfangstemperaturen, wie sie bei Feuergastrocknungen auftreten, dadurch vermieden werden, daß, solange die Zufuhr des Trockengutes in die unter Feuer stehende Trockenantage, sei es mit oder ohne Absicht, ganz oder teilweise abgesperrt ist, die im regelrechten Betrieb der Anlage vom Trockengut aufzunehmende Wärme durch-Einbringen von Wasser hinter der Heizquelle so weit vernichtet wird, daß das' eingebrachte Wasser vollständig verdampft und mit den hierdurch gekühlten Heizgasen als Dampf aus der Anlage abzieht. Dabei wird,das zu verdampfende Wasser zweckmäßigerweise über den ganzen Querschnitt des Heizgasstromes verteilt, was. beispielsweise durch Einsprühen mittels Düsen geschehen kann.The difficulties mentioned can according to the invention with particular Advantage with the high initial temperatures that occur with fire gas drying, be avoided that as long as the supply of the dry material in the under Fire standing dry days, be it with or without intent, in whole or in part is locked, the material to be absorbed by the dry material during normal operation of the system Heat is destroyed by introducing water behind the heating source to such an extent that that the 'introduced water evaporates completely and with the thereby cooled Removes heating gases as steam from the system. In doing so, the water to be evaporated expediently distributed over the entire cross section of the heating gas flow, what. can be done for example by spraying using nozzles.
Erwünschtenfalrs kann gemäß der Erfindung bei der Trocknung wasserhaltiger Rohstoffe so vorgegangen werden, daß nach dem Anstellen der Feuerung vor der Eintragung des Trockengutes der Beharrungszustand der Anlage in bezwg auf die zur Verdampfung der Rohstoffeuchtigkeit erforderliche Wärmemenge und Wärmespannung unter Einsprühen von Wasser vorher eingestellt wird. Nach Erreichung des gewünschten Beharrungszustandes wind vom Wasser auf Trockengut, zwecks Stillsetzung der Anlage umgekehrt vom Trockengut auf Wasser umgestellt. In beiden Fällen ist es besonders angezeigt, die eingebrachte Wassermenge zu messen.According to the invention, water-containing substances can be used in the drying process, if desired Raw materials are proceeded in such a way that after turning on the furnace before the entry of Dry material the steady state of the system in relation to the evaporation of the Raw material moisture, required amount of heat and thermal tension under spraying of water is set beforehand. After reaching the desired steady state wind from water to dry material, in order to shut down the plant the other way round from dry material switched to water. In both cases it is particularly advisable to use the one brought in Measure the amount of water.
Das angegebene Verfahren bietet in seiner Anwendung auf die Trocknung brennbarer Rohstoffe, insbesondere also von Brennstoffezi, den gleichzeitigen Vorteil eines imimer .bereiten und wirksamen Schutzes gegen die in solchen Fällen niennals -ganz vermeidbare Brandgefahr.The specified method offers in its application to drying flammable raw materials, especially from Brennstoffezi, the simultaneous advantage an immediate and effective protection against the niennals in such cases - Completely avoidable fire hazard.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS573417X | 1930-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE573417C true DE573417C (en) | 1933-03-31 |
Family
ID=5453656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930573417D Expired DE573417C (en) | 1930-11-17 | 1930-12-17 | Process for the operation of drying plants |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE573417C (en) |
-
1930
- 1930-12-17 DE DE1930573417D patent/DE573417C/en not_active Expired
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