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GB2155354A - Gas cleaning apparatus - Google Patents
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GB2155354A - Gas cleaning apparatus - Google Patents

Gas cleaning apparatus Download PDF

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Publication number
GB2155354A
GB2155354A GB08501132A GB8501132A GB2155354A GB 2155354 A GB2155354 A GB 2155354A GB 08501132 A GB08501132 A GB 08501132A GB 8501132 A GB8501132 A GB 8501132A GB 2155354 A GB2155354 A GB 2155354A
Authority
GB
United Kingdom
Prior art keywords
plates
plate
filter elements
housing
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.)
Granted
Application number
GB08501132A
Other versions
GB2155354B (en
GB8501132D0 (en
Inventor
Hans-Joachim Meier
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.)
Deutsche Babcock Werke AG
Original Assignee
Deutsche Babcock Werke AG
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 Deutsche Babcock Werke AG filed Critical Deutsche Babcock Werke AG
Publication of GB8501132D0 publication Critical patent/GB8501132D0/en
Publication of GB2155354A publication Critical patent/GB2155354A/en
Application granted granted Critical
Publication of GB2155354B publication Critical patent/GB2155354B/en
Expired 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
    • 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
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B01D46/0009—Tray-like arrangements of filters in a vessel
    • 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
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2407—Filter candles
    • 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
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
    • 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
    • B01D46/72—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 backwash arms, shoes or nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/104—High temperature resistant (ceramic) type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Apparatus for the removal of dust from hot combustion gas under pressure comprises a plurality of tubular ceramic filter elements (12) which are closed at one end and are held by their open ends in apertures in plates (11). Several tube plates (11) are arranged at different heights within a housing (1), wherein the diameter of the plates (11) increases upwards of the housing (1). Connected to each of the lower plates (11) is a respective hood (16) for removing filtered gas from the elements (12), and each hood narrows upwardly and is connected in gas-tight manner with a central aperture (17) in the plate (11) arranged thereabove. Filtered gas is removed from the space above top plate (11). A rotary nozzle 18 sweeps over each plate (11) to deliver reverse flow gas to clean the elements (12). <IMAGE>

Description

SPECIFICATION Gas cleaning apparatus The present invention relates to apparatus for cleaning hot gas, especially for the removal of dust from hot gas under pressure.
Apparatus, described in GB-PS 14 71 606, for this purpose is employed for the separation of suspended radio-active particles from a gas. In that case, a sintered metal is used as the material for the tubular filter elements.
It would be of advantage to provide apparatus for the cleaning of flue gas generated under pressure in a steam generator for the combustion of fuel, such apparatus being capable of handling high throughput rates.
According to the present invention there is provided apparatus for cleaning hot gas, comprising a housing, a plurality of plates arranged in the housing at spacings one above the other and comprising a lower plate and a plurality of upper plates, a respective plurality of tubular filter elements mounted at open ends thereof in each of the plates, the elements of each plurality being closed at their other ends, means defining a respective extraction hood above each plurality of filter elements, and cleaning means extending through central apertures in the upper plates and comprising a respective cleaning device disposed above each plurality of filter elements.
A parallel connection of the filter elements associated with each plate can be achieved in such apparatus, so that high gas throughput rates are possible. The particular arrangement of the cleaning means requires little space so that altogether compact filter equipment is provided. In this manner, it is possible to employ filter tubelets.
Embodiments of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which: Figure 1 is a longitudinal sectional view of apparatus embodying the invention; Figure 2 is the detail Z of Fig. 1 showing one form of mounting filter elements in the apparatus; and Figure 3 is the detail Z of Fig. 1 showing another form of mounting filter elements in the apparatus.
Referring now to the drawings, there is shown apparatus which serves for the cleaning of hot gases, standing under pressure, from the combustion of fuels in the furnace of a steam generator. A pressure-charged fluidised bed furnace can be employed as the furnace. The apparatus comprises a housing 1, preferably a cylindrical housing of vertical mode of construction, surrounded by an insulating layer 2 for protection against heat radiation.
In its lower region, the housing is provided with a feed pipe 3 for the raw gas. An outlet pipe 4 for the cleaned pure gas is connected to the narrowed upper part of the housing 1.
The part of the housing 1 below the pipe 3 is constructed as a funnel 5. A collecting funnel 7 for the dust separated out in the housing is connected to the funnel 5 by way of a sluice system 6. The collecting funnel 7 is provided with an output device 8, in the form of a cooled conveying worm.
Two closure flaps 9 are arranged one behind the other in each of the feed pipe 3 and the outlet pipe 4. Provided between the closure flaps 9 is a stub pipe 10, through which a medium standing under pressure can be supplied to or exhausted from the housing in order to place the housing under pressure or to relieve it. Further stub pipes 10 of that kind can be connected to the housing to the collecting funnel 7 and to the sluice system 6.
Plates 11 are provided at different heights in the housing 1. The diameter of the plates 11 increases with the height of the housing 1, thus in the flow direction of raw gas to be cleaned. Ceramic tubular filter elements 12 are suspended in each plate 11.
Each filter element 12 is closed at one side and projects by its closed end into the interior of the housing. The open upper end of the filter element 12 penetrates one of the plates 11. At this end, the filter element 12 is provided with a collar 13, which rests on an annular shoulder 14 in the plate 11 (Fig. 2 or Fig. 3). The filter element 12 is detachably held in the plate 11 by a securing plate 15. After detaching of the securing plate 15, the filter elements 12 can be removed upwardly. In order to facilitate removal of the filter elements 12 with a small overall height of the housing 1, the plates 11 can be, as illustrated in Fig. 3, installed in the housing 1 at a small angle to the horizontal.
An extraction hood 16, which conically narrows upwardly, is connected to each plate 11 above the filter elements 12. The extraction hood associated with the uppermost plate 11 is formed by the housing 1. Each plate 11, with the exception of the lower plate, is provided with a central recess 17.
Connected in gas-tight manner with the recess 17 of one plate 11 is the upper end of the extraction hood 16 of the plate 11 arranged thereunder. At the same time, the extraction hoods 16 serve for the suspension of each plate from the plate thereabove. The plates 11 equipped with the filter elements 12 are connected in parallel at the gas side by this arrangement.
The filter cake, which forms on the outside of the filter elements 12, is removed from time to time through scavenging gas of increased pressure, which flows through the filter elements 12 against the direction of the gas to be cleaned. A cleaning device is provided above each pate 11 and is employed for the performance of the filter cleaning. It consists of nozzles which are arranged on a rotata ble arm 18 so as to be able to wipe over the associated plate. The nozzles are supplied through a tube 19, which is guided through the central recesses 17 of the plates 11. A number of co-axial tubes 19 is provided, which corresponds to the number of the plates 11. The tubes 19 issue centrally from the top of the housing 1 and are provided with a rinsing gas connection 20 and a rotary drive 21.

Claims (9)

1. Apparatus for cleaning hot gas, comprising a housing, a plurality of plates arranged in the housing at spacings one above the other and comprising a lower plate and a plurality of upper plates, a respective plurality of tubular filter elements mounted at open ends thereof in each of the plates, the elements of each plurality being closed at their other ends, means defining a respective extraction hood above each plurality of filter elements, and cleaning means extending through central apertures in the upper plates and comprising a respective cleaning device disposed above each plurality of filter elements.
2. Apparatus as claimed in claim 1, wherein each of the filter elements comprises ceramic material.
3. Apparatus as claimed in either claim 1 or claim 2, wherein the hood disposed above the filter elements of the lower plate is connected to that plate and to the respective adjacent one of the upper plates at the central aperture therein, and the hood disposed above the filter elements of said one of the upper plates is connected to that plate and to the next upper plate at the central aperture therein.
4. Apparatus as claimed in any one of the preceding claims, wherein the diameter of each of the upper plates is greater than that of the respectively adjacent plate thereunder.
5. Apparatus as claimed in any one of the preceding claims, wherein each of the plates is inclined at a small angle to the horizontal.
6. Apparatus as claimed in any one of the preceding claims, wherein the filter elements of each plurality are removably mounted in the respective plate.
7. Apparatus substantially as hereinbefore described with reference to Fig. 1 of the accompanying drawings.
8. Apparatus as claimed in claim 7 and substantially as hereinbefore described with reference to Fig. 2 of the accompanying drawings.
9. Apparatus as claimed in claim 7 and substantially as hereinbefore described with reference to Fig. 3 of the accompanying drawings.
GB08501132A 1984-03-09 1985-01-17 Gas cleaning apparatus Expired GB2155354B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843408627 DE3408627A1 (en) 1984-03-09 1984-03-09 DEVICE FOR DEDUSTING HOT GASES

Publications (3)

Publication Number Publication Date
GB8501132D0 GB8501132D0 (en) 1985-02-20
GB2155354A true GB2155354A (en) 1985-09-25
GB2155354B GB2155354B (en) 1987-09-30

Family

ID=6229996

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08501132A Expired GB2155354B (en) 1984-03-09 1985-01-17 Gas cleaning apparatus

Country Status (5)

Country Link
DE (1) DE3408627A1 (en)
DK (1) DK18085A (en)
GB (1) GB2155354B (en)
SE (1) SE454242B (en)
ZA (1) ZA85637B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249719A3 (en) * 1986-05-19 1988-01-13 Westinghouse Electric Corporation Hot gas cross flow filtering module
EP0351552A1 (en) * 1988-06-22 1990-01-24 Filtan Filter-Anlagenbau GmbH Device for the separation of impurities from gases
EP0433637A1 (en) * 1989-12-21 1991-06-26 Deutsche Babcock Anlagen Gmbh Device for removing dust from a gas
EP0572063A1 (en) * 1992-05-18 1993-12-01 Shell Internationale Researchmaatschappij B.V. Filtration module
WO1994003260A1 (en) * 1992-08-05 1994-02-17 Seghers Engineering N.V. Filter for filtering gases charged with particles
EP0682971A1 (en) * 1994-05-18 1995-11-22 Pall Corporation Filtering apparatus
WO1996036973A1 (en) * 1995-05-18 1996-11-21 British Nuclear Fuels Plc Air extract system for a containment
CN102867558A (en) * 2012-09-28 2013-01-09 清华大学 Dusty gas filter
WO2013150498A3 (en) * 2012-04-05 2014-02-20 Tenova Pyromet (Proprietary) Limited Method and apparatus for dry filtering process gas

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922764A1 (en) * 1989-07-11 1991-01-17 Babcock Werke Ag METHOD AND DEVICE FOR SEPARATING SOLID FROM A GAS
US5505906A (en) * 1991-05-31 1996-04-09 A. Ahlstrom Corporation Cleaning of high temperature high pressure (HTHP) gases
US5458665A (en) * 1993-07-12 1995-10-17 A. Ahlstrom Corporation Apparatus for filtering gases
US5536285A (en) * 1993-07-12 1996-07-16 Foster Wheeler Energia Oy Ceramic filtering of gases
US5482537A (en) * 1994-05-18 1996-01-09 A. Ahlstrom Corporation Gas filtering apparatus
US5453108A (en) * 1994-05-18 1995-09-26 A. Ahlstrom Corporation Apparatus for filtering gases
CN110743282B (en) * 2019-11-07 2021-04-20 南京工业大学 A variable diameter gas purification ceramic filter membrane tube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1471606A (en) * 1973-09-12 1977-04-27 Gen Electric Apparatus and method for collecting particulate nuclear fuel material from a gas stream

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0249719A3 (en) * 1986-05-19 1988-01-13 Westinghouse Electric Corporation Hot gas cross flow filtering module
EP0351552A1 (en) * 1988-06-22 1990-01-24 Filtan Filter-Anlagenbau GmbH Device for the separation of impurities from gases
EP0433637A1 (en) * 1989-12-21 1991-06-26 Deutsche Babcock Anlagen Gmbh Device for removing dust from a gas
US5094673A (en) * 1989-12-21 1992-03-10 Deutsche Babcock Anlagen Aktiengesellschaft Apparatus for dedusting a gas stream
EP0572063A1 (en) * 1992-05-18 1993-12-01 Shell Internationale Researchmaatschappij B.V. Filtration module
AU656854B2 (en) * 1992-05-18 1995-02-16 Shell Internationale Research Maatschappij B.V. Filtration module
AU674861B2 (en) * 1992-08-05 1997-01-16 Seghers Engineering N.V. Filter gases charged with particles
WO1994003260A1 (en) * 1992-08-05 1994-02-17 Seghers Engineering N.V. Filter for filtering gases charged with particles
BE1006111A5 (en) * 1992-08-05 1994-05-17 Seghers Engineering Filter for filtering particles loaded with gas.
US5536284A (en) * 1992-08-05 1996-07-16 Seghers Engineering N.V. Filter for filtering gases laden with particles
EP0682971A1 (en) * 1994-05-18 1995-11-22 Pall Corporation Filtering apparatus
WO1996036973A1 (en) * 1995-05-18 1996-11-21 British Nuclear Fuels Plc Air extract system for a containment
US6017376A (en) * 1995-05-18 2000-01-25 British Nuclear Fuels Plc Air extract system for a containment
WO2013150498A3 (en) * 2012-04-05 2014-02-20 Tenova Pyromet (Proprietary) Limited Method and apparatus for dry filtering process gas
CN104349830A (en) * 2012-04-05 2015-02-11 特诺恩派罗梅特私人有限公司 Method and apparatus for dry filtering process gas
CN102867558A (en) * 2012-09-28 2013-01-09 清华大学 Dusty gas filter

Also Published As

Publication number Publication date
ZA85637B (en) 1985-09-25
GB2155354B (en) 1987-09-30
SE8406603D0 (en) 1984-12-27
DE3408627A1 (en) 1985-09-12
SE8406603L (en) 1985-09-10
DK18085A (en) 1985-09-10
SE454242B (en) 1988-04-18
DK18085D0 (en) 1985-01-15
GB8501132D0 (en) 1985-02-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee