DE3412758A1 - Hot gas filter having a preheating apparatus for flushing gases - Google Patents

Hot gas filter having a preheating apparatus for flushing gases

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Publication number
DE3412758A1
DE3412758A1 DE19843412758 DE3412758A DE3412758A1 DE 3412758 A1 DE3412758 A1 DE 3412758A1 DE 19843412758 DE19843412758 DE 19843412758 DE 3412758 A DE3412758 A DE 3412758A DE 3412758 A1 DE3412758 A1 DE 3412758A1
Authority
DE
Germany
Prior art keywords
filter
heat exchanger
cleaning
tube
hot gas
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.)
Withdrawn
Application number
DE19843412758
Other languages
German (de)
Inventor
Heribert Dipl.-Ing. 4390 Gladbeck Dewert
Heinrich Ing.(grad.) 4600 Dortmund Gresch
Heinz Dipl.-Ing. Hölter
Heinrich Dipl.-Ing. 4390 Gladbeck Igelbüscher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19843412758 priority Critical patent/DE3412758A1/en
Publication of DE3412758A1 publication Critical patent/DE3412758A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/20—High temperature filtration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

It is known to use fabric filters for the purification of hot gases and to clean off these filters using compressed air shock. In order to prevent an undercooling of the filter when cold compressed air is used, according to the invention it is proposed that each filter surface (3) to be cleaned is furnished with a heat exchanger tube (5) in such a manner that the cleaning pulse flows through the exchanger surface before it reaches the filter surface (3) for cleaning. The heat exchanger tube (5) has a diffuse-like opening at its top end (8) to suck in a secondary jet stream. Heating apparatuses (9) are mounted externally and/or internally on the heat exchanger tube (5). <IMAGE>

Description

Beschreibung und Erläuterung zur PatentanmeldungDescription and explanation of the patent application

Heißgasfilter mit Vorerhitzungsvorrichtung für Spülgase" Es ist bekannt, zur Reinigung von heißen Gasen Gewebefilter einzusetzen.Hot gas filter with preheating device for purge gases "It is known use fabric filters to clean hot gases.

Die Schwierigkeit liegt u.a. nicht nur im Gewebe, sondern auch im Reinigungstrakt für das Gewebe.The difficulty lies not only in the tissue, but also in the Cleaning tract for the tissue.

Es ist bekannt, mittels Druckluftschock oder Druckstickstoffschock bzw. mittels eines vorgegebenen Gasschocks, die Filter zu reinigen.It is known to use compressed air shock or pressure nitrogen shock or by means of a predetermined gas shock to clean the filter.

Bei der Einströmung durch das Druckventil wird in der Regel das Kaltgas oder ein aufwendig erhitztes Gas zur Reinigung der Filter eingesetzt.When flowing in through the pressure valve, the cold gas is usually or a laboriously heated gas is used to clean the filter.

Beim kalten Medium entstehen vielfach Taupunktsunterschreitungen, die zu Kondensaten auf dem Filtermaterial führen, und damit wird die Filterfläche inaktiv oder undurchlässig und dadurch verstopft.When the medium is cold, the dew point is often not reached, which lead to condensates on the filter material, and thus the filter surface inactive or impermeable and thus clogged.

Um den Nachteil der Unterkühlung auf einfachste Art und Weise zu vermeiden, wird erfindungsgemäß vorgeschlagen, ein Verfahren und eine Vorrichtung entsprechend beiliegender Zeichnung zu verwenden.To avoid the disadvantage of hypothermia in the simplest possible way, the invention proposes a method and a device accordingly to use the enclosed drawing.

In der beiliegenden Zeichnung ist dargestellt: mit (1) der Lufteintritt in das Filtergehäuse; mit (2) der Luftaustritt aus dem Oberteil des Filtergehäuses; mit (3) das Gewebefilter als Tasche oder Schlauch ausgebildet; mit (4) die übliche Blaseinrichtung zur Reinigung der Filterschläuche; mit (5) die im Gasstrom liegende erhitzte Rohrführung des Blasstrahls (4), der über der Düse (7) zur Reinigung des Filterschlauches (3) dient; mit (6) Wärmetauscherflächen; mit (7) die Düse; bei (8) wird durch das Ansaugen der heißen Gase der kalte Gasstrahl gemischt; mit (9) sind Aufheizvorrichtungen angedeutet, um bei Bedarf wahlweise diese Wärmetauschereinheiten zusätzlich aufheizen zu können.The attached drawing shows: with (1) the air inlet into the filter housing; with (2) the air outlet from the top of the filter housing; with (3) the fabric filter designed as a bag or hose; with (4) the usual Blower for cleaning the filter bags; with (5) the one lying in the gas stream heated pipe guide of the blow jet (4), which is above the Nozzle (7) serves to clean the filter hose (3); with (6) heat exchanger surfaces; with (7) the nozzle; at (8) the cold gas jet is created by sucking in the hot gases mixed; with (9) heating devices are indicated in order to selectively if necessary to be able to additionally heat these heat exchanger units.

Auf dem Weg zum Filterschlauch wird nicht nur durch das Ansaugen der heißen Gase der kalte Gasstrahl bei (8) gemischt, sondern während des Transportes bis zum Filter durch die zwangsläufige Führung des Gases im Rohr (5) wird das Gas vorzugsweise weiterhin erfindungsgemäß durch Wärmetauscherflächen (6) bis zum Eintritt in den Filterschlauch (3) soweit erwärmt, daß eine Taupunktsunterschreitung durch den Reinigung strahl vermieden wird.On the way to the filter bag is not only due to the suction of the hot gases mixed with the cold gas jet at (8), but rather during transport up to the filter through the inevitable guidance of the gas in the pipe (5) the gas preferably also according to the invention through heat exchanger surfaces (6) up to the inlet in the filter hose (3) warmed up to such an extent that the temperature drops below the dew point the cleaning jet is avoided.

Wenn der Druckschockeffekt zu Ende ist, wird das Rohr vom Reingas durchströmt, so daß das Rohr (5) und auch die Wärmetauscherflächen (6) wieder zur Wärmeabgabe aufgeheizt werden.When the pressure shock effect is over, the pipe becomes clean gas flows through, so that the tube (5) and the heat exchanger surfaces (6) back to Heat dissipation.

Erfindungsgemäß sind die Massen der Teile(5) und (6) so hoch gewählt, daß der durch Wärmeabgabe an den Blasstrahl verursachte Temperaturverlust in dieser erfindungsgemäßen Einrichtung gering ist, so daß es auch durch die Wärmeabgabe in der Rekuperatorfläche nicht zu Taupunktsunterschreitumgen während des Abkühlens kommt.According to the invention, the masses of parts (5) and (6) are chosen so high that that the loss of temperature caused by the dissipation of heat to the blower jet in this Device according to the invention is small, so that it is also due to the heat dissipation in the recuperator surface does not fall below the dew point during cooling comes.

Durch diese erfindungsgemäße Maßnahme kann ein Heißgasfilter ohne äußere Vorwärmung der Blasluft sicher betrieben werden, ohne daß es zu Taupunktsunterschreitungen und somit Verstopfungen des Filtergewebes kommt.By means of this measure according to the invention, a hot gas filter can be used without external preheating of the blown air can be operated safely without falling below the dew point and thus blockages of the filter fabric.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen dargestellten und beschriebenen Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, dem zu reinigenden Filterschlauch ein Impulsführungsrohr vorzuschalten, das den Reinigungsimpulsstrahl durch Wärmeabgabe auf die Filtertemperatur vorwärmt, und dieses Reinigungsrohr in der Zwischenzeit, in der nicht gereinigt wird, vom Gasstrom wiederaufgeheizt wird und soviel Masse besitzt, daß eine genügend hohe Wärmeabgabe an den Impulsstrahl erfolgen kann, ohne selbst soweit abgekühlt zu werden, daß eine Taupunktsufterschreitung im Rohr entsteht, - und dies wird vielfach durch zusätzliche Wärmespeicher-Tauscherflächen geschaffen.Of course, the invention is not limited to the above in detail illustrated and described Forms of training limited, but rather numerous changes are possible without, however, deviating from the basic idea, upstream of the filter hose to be cleaned, a pulse guide tube, which the The cleaning pulse jet is preheated to the filter temperature by emitting heat, and this cleaning tube in the meantime, in which there is no cleaning, from the gas flow is reheated and has so much mass that a sufficiently high heat emission can be done to the pulse beam without being cooled so far that a Dew point excess in the pipe arises - and this is often due to additional Heat storage exchanger surfaces created.

Patentansprüche: - Leerseite - Patent claims: - blank page -

Claims (1)

Patentansprüche: Anspruch 1 Heißgasfilter mit Impulsreinigung dadurch gekennzeichnet, daß die jeweils zu reinigende Filterfläche mit einem Wärmetauscherrohr derart versehen ist, daß der Reinigungsimpuis diese Tauscherfläche durchströmt bevor er die Filterfläche zur Reinigung erreicht.Claims: Claim 1 hot gas filter with pulse cleaning as a result characterized in that the filter surface to be cleaned is provided with a heat exchanger tube is provided in such a way that the cleaning pulse flows through this exchanger surface before he reaches the filter surface for cleaning. Anspruch 2 Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß diese Tauscherfläche vorzugsweise als Rohr (5) ausgebildet ist.Claim 2 method according to claim 1, characterized in that this Exchanger surface is preferably designed as a tube (5). Anspruch 3 Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 - 2 dadurch gekennzeichnet, daß das Rohr (5) Tauscherflächen (6), vorzugsweise als Rippen ausgebildet, enthält.Claim 3 device for performing the method according to claim 1-2, characterized in that the tube (5) exchanger surfaces (6), preferably designed as ribs contains. Anspruch 4 Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 - 3 dadurch gekennzeichnet, daß das Wärmetauscherrohr vorzugsweise am oberen Ende bei (8) eine diffuserartige Öffnung zur Sekundärstrahlansaugung aufweist.Claim 4 device for performing the method according to claim 1-3, characterized in that the heat exchanger tube is preferably at the upper end at (8) has a diffuser-like opening for secondary jet suction. Anspruch 5 Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 - 4 dadurch gekennzeichnet, daß am Rohr (9) - außen und/oder innen - entsprechende Aufheizvorrichtungen wahlweise angebracht sind.Claim 5 device for performing the method according to claim 1 - 4 characterized in that on the tube (9) - outside and / or inside - corresponding Heaters are optionally attached.
DE19843412758 1984-04-05 1984-04-05 Hot gas filter having a preheating apparatus for flushing gases Withdrawn DE3412758A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843412758 DE3412758A1 (en) 1984-04-05 1984-04-05 Hot gas filter having a preheating apparatus for flushing gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843412758 DE3412758A1 (en) 1984-04-05 1984-04-05 Hot gas filter having a preheating apparatus for flushing gases

Publications (1)

Publication Number Publication Date
DE3412758A1 true DE3412758A1 (en) 1985-10-17

Family

ID=6232710

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843412758 Withdrawn DE3412758A1 (en) 1984-04-05 1984-04-05 Hot gas filter having a preheating apparatus for flushing gases

Country Status (1)

Country Link
DE (1) DE3412758A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113217A1 (en) * 1991-04-23 1992-10-29 Kurt Kugler Reverse pulse jet cleaning dust filter - using preheated pulse gas to avoid condensation, used for pyrolysis tars in high temp. waste-incinerator smoke-gases
US5562746A (en) * 1994-04-11 1996-10-08 Donaldson Company, Inc. Air filter assembly for filtering air with particulate matter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE252431C (en) *
DE3004453A1 (en) * 1980-02-07 1981-08-13 Intensiv-Filter Gmbh & Co Kg, 5620 Velbert TWO-STAGE INJECTOR FOR THE EXHAUST GAS CLEANING OF DUST FILTERS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE252431C (en) *
DE3004453A1 (en) * 1980-02-07 1981-08-13 Intensiv-Filter Gmbh & Co Kg, 5620 Velbert TWO-STAGE INJECTOR FOR THE EXHAUST GAS CLEANING OF DUST FILTERS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4113217A1 (en) * 1991-04-23 1992-10-29 Kurt Kugler Reverse pulse jet cleaning dust filter - using preheated pulse gas to avoid condensation, used for pyrolysis tars in high temp. waste-incinerator smoke-gases
US5562746A (en) * 1994-04-11 1996-10-08 Donaldson Company, Inc. Air filter assembly for filtering air with particulate matter

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