DE2935229A1 - Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions - Google Patents

Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions

Info

Publication number
DE2935229A1
DE2935229A1 DE19792935229 DE2935229A DE2935229A1 DE 2935229 A1 DE2935229 A1 DE 2935229A1 DE 19792935229 DE19792935229 DE 19792935229 DE 2935229 A DE2935229 A DE 2935229A DE 2935229 A1 DE2935229 A1 DE 2935229A1
Authority
DE
Germany
Prior art keywords
filter
dust
explosions
reverse jet
pneumatic conveying
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.)
Ceased
Application number
DE19792935229
Other languages
German (de)
Inventor
Heinz Ing.(Grad.) 4600 Dortmund Gresch
Heinz Ing.(grad.) 4390 Gladbeck Hölter
Heinrich Ing.(grad.) 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.)
HOELTER ING GRAD HEINZ
Original Assignee
HOELTER ING GRAD HEINZ
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 HOELTER ING GRAD HEINZ filed Critical HOELTER ING GRAD HEINZ
Priority to DE19792935229 priority Critical patent/DE2935229A1/en
Publication of DE2935229A1 publication Critical patent/DE2935229A1/en
Ceased legal-status Critical Current

Links

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
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0091—Including arrangements for environmental or personal protection
    • B01D46/0093—Including arrangements for environmental or personal protection against fire or explosion
    • 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
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C11/00—Other auxiliary devices or accessories specially adapted for grain mills
    • B02C11/06—Arrangements for preventing fire or explosion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Food Science & Technology (AREA)
  • Cleaning In General (AREA)

Abstract

Dust explosions in filter associated with grinders for combustible materials has a draw off system for the collected dust which contains no moving parts which could create friction. This avoids the ignition of the dust. The filter cloth elements are cleaned by reverse jet pulse using N2. This also suppresses the tendency to cause ignition. The filter is for use on grinding plants operating with combustible material. The precautions described avoid or reduce the risk of dust explosion by eliminating points at which ignition could occur.

Description

In Mühlenanlagen kommt es immer wieder zu Staubexplosionen in Filtereinrichtungen.In mill systems, dust explosions occur time and again in filter devices.

Rütteleinrichtungen im Filter oder reibende Austragsorgane wie Schnecken oder Stegkettenförderer führen zur Zündtemperatur und bewirken dadurch eine Staubexplosion.Vibrating devices in the filter or rubbing discharge elements such as screws or chain conveyors lead to the ignition temperature and thus cause a dust explosion.

Um diese Nachteile zu vermeiden, wird erfindungsgemäß vorgeschlagen, zwei Vorrichtungen zu verwenden, die eine Staubexplosion vermeiden,In order to avoid these disadvantages, it is proposed according to the invention to use two devices which avoid a dust explosion,

1. als Austragsorgan für die vom Filtertuch gereinigten, abgefallenen Stäube einen Fluid-Förderer anstelle von reibenden Fördermitteln zu verwenden,1. to use a fluid conveyor instead of abrasive conveying means as the discharge device for the dust that has been cleaned from the filter cloth,

2. das Reinigen der Filtertücher nicht durch einen Rüttelvorgang vorzunehmen, sondern durch Druckgasdüsen, die mit einem Inertgas, vorzugsweise Stickstoff, beschickt werden.2. Do not clean the filter cloths by shaking them, but by using pressurized gas nozzles that are charged with an inert gas, preferably nitrogen.

Durch diese beiden erfindungsgemäßen Merkmale ist die Gewähr gegeben, dass Explosionen mit größtmöglicher Wahrscheinlichkeit ausgeschlossen werden.These two features according to the invention ensure that explosions are excluded with the greatest possible probability.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen beschriebenen Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, oder jedoch von dem Grundgedanken abzuweichen, ein Verfahren und eine Vorrichtung zur Verhinderung von Staubexplosionen in Filteranlagen, vorzugsweise in Mühlen, so zu gestalten, dass der Reinigungsvorgang für die filternden Flächen durch Inertgasspül- und/oder Druckschockeinrichtungen vorgenommen wird und der Austrag der abgeschiedenen Stäube über eine Fluidisiersystemtechnik erfolgt.Of course, the invention is not limited to the forms of embodiment described in detail above, but numerous modifications are possible or, however, deviating from the basic idea of designing a method and a device for preventing dust explosions in filter systems, preferably in mills, so that the The cleaning process for the filtering surfaces is carried out by means of inert gas flushing and / or pressure shock devices and the separated dusts are discharged via a fluidization system technology he follows.

In der beiliegenden Zeichnung ist die Erfindung näher beschrieben:The invention is described in more detail in the accompanying drawing:

mit 1 ein Filteraggregatwith 1 a filter unit

mit 2 das Ansaugrohrwith 2 the suction pipe

mit 3 der unterdruckerzeugende Ventilatorwith 3 the vacuum generating fan

mit 4 eine Inertgasvorrats- oder -erzeugungsanlage, die die Filterflächen 5 im Filter durch Spüldüsen oder Druckschockdüsen reinigtwith 4 an inert gas supply or generation system that cleans the filter surfaces 5 in the filter by flushing nozzles or pressure shock nozzles

mit 6 die Fluidförderrinne, die integriert im Filter den Austrag des abgereinigten Staubes bewirkt.with 6 the fluid conveyor channel, which is integrated in the filter and causes the removed dust to be discharged.

Claims (1)

Verfahren zur Beseitigung von Explosionen in vorzugsweise Mühlenfiltern dadurch gekennzeichnet, dass das Austragsorgan keine reibenden Förderteile aufweist, sondern als Fluidfördersystem ausgebildet ist und die Abreinigung der Filtertücher durch Inertgas, vorzugsweise Stickstoff, mittels Blas- und/oder Druckschockdüsen vorgenommen wird.Method for eliminating explosions in mill filters, preferably characterized in that the discharge element has no rubbing conveying parts, but is designed as a fluid conveying system and the filter cloths are cleaned by inert gas, preferably nitrogen, by means of blow and / or pressure shock nozzles.
DE19792935229 1979-08-31 1979-08-31 Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions Ceased DE2935229A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792935229 DE2935229A1 (en) 1979-08-31 1979-08-31 Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792935229 DE2935229A1 (en) 1979-08-31 1979-08-31 Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions

Publications (1)

Publication Number Publication Date
DE2935229A1 true DE2935229A1 (en) 1981-03-26

Family

ID=6079746

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792935229 Ceased DE2935229A1 (en) 1979-08-31 1979-08-31 Filter for combustible dusts - having nitrogen reverse jet cleaning and pneumatic conveying to remove accumulated dust to avoid dust explosions

Country Status (1)

Country Link
DE (1) DE2935229A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE885188C (en) * 1943-08-20 1953-08-03 Sueddeutsche Kalkstickstoff Process for the fine separation of soot or similar very finely divided solids from gases or vapors
AT184812B (en) * 1952-02-23 1956-02-25 Hermann Ing Ruderstorfer Device for protecting coal grinding plants from explosion and fire
DE1228130B (en) * 1956-07-09 1966-11-03 Slick Ind Company Process for cleaning hollow filter elements from dust collectors by pressure surge backwashing using scavenging air and pressurized gas backwashing device
DE1266685B (en) * 1966-06-28 1968-04-18 Gema A G Appbau Pneumatic conveying device with adjustable conveying capacity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE885188C (en) * 1943-08-20 1953-08-03 Sueddeutsche Kalkstickstoff Process for the fine separation of soot or similar very finely divided solids from gases or vapors
AT184812B (en) * 1952-02-23 1956-02-25 Hermann Ing Ruderstorfer Device for protecting coal grinding plants from explosion and fire
DE1228130B (en) * 1956-07-09 1966-11-03 Slick Ind Company Process for cleaning hollow filter elements from dust collectors by pressure surge backwashing using scavenging air and pressurized gas backwashing device
DE1266685B (en) * 1966-06-28 1968-04-18 Gema A G Appbau Pneumatic conveying device with adjustable conveying capacity

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8131 Rejection