Classifications

• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
  • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
  • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
  • F23C10/00—Fluidised bed combustion apparatus
  • F23C10/18—Details; Accessories
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S55/00—Gas separation
  • Y10S55/37—Louvers

Definitions

• the invention relates to a separator for separating solids from a gas stream rising in a channel bounded by several walls and loaded with solids, in particular solids from the rising flue gas stream of a fluidized bed furnace, with at least two layers of staggered and opposed walls there are traps of essentially U-shaped cross-section that open against the flue gas flow, and in which gutter-like pockets are formed on the free ends of their thighs and the solids separated from the gutter lead to wall pockets.
• each gutter adjacent to the wall is assigned an outlet channel piece which extends to the wall and has a slot-like outlet opening lying on the wall and opening downwards, and that one is located between the outlet channel pieces extend each layer of gutters baffles at a distance from each other and at a distance from the wall, which delimit at least one gas passage slot between them.
• the outlet channel piece ensures a safe deflection and, if necessary, bringing together the two drain strands emerging from the channel-like catch pockets.
• the at least one slot defined between the baffles enables pressure equalization between the individual gutter layers on the one hand and on the other hand the greatest possible reduction in the circulation of the bypass flow within one layer.
• the edges of the outlet opening of the outlet channel piece and the guide plates, which are adjacent to the wall are assigned downward angled lines in order to create defined flow conditions.
• the outlet opening of each outlet channel piece can be delimited by the wall, ie the wall forms the end face of the outlet channel piece.
• the connecting duct piece is closed at its end against the wall by a low-wear end plate in order to limit the erosions caused by the removed solids on the wall.
• the gutter is at least partially closed at its end facing the connecting duct piece while leaving the outlet cross sections of the collecting pockets free.
• the bypass flow can be adjusted via the gutter due to the extent of the closure.
• the inclination and, if appropriate, the position of the guide plates arranged at a distance correspond to the inclination and, if appropriate, the position of the top surface or the bottom surface of the outlet duct piece.
• the distance between the edges, in particular buckling edges, of the guide plates from the wall is smaller in the upper layer than in the lower layer in order to dissipate the increase in the amount of separated solids on the wall.
• the distance is therefore dependent on the cross-sectional size of the catch pockets and the number of gutter layers. Since the connection duct pieces are closed in their top surface, the separated solid is discharged downwards through the slots remaining between the edges of the guide plates and the wall.
• the individual layers of the gutters, the connection duct pieces and the in the spaces between the Connection duct pieces arranged baffles can be arranged at a predetermined distance from each other, so that a gas passage slot is built between them in the vicinity of the wall.
• roof-shaped attachments can be provided on the top surface of the connecting channel piece, or the top surface can be designed correspondingly roof-shaped.
• the invention also relates to a device for separating and discharging solids with a separator of the type mentioned above.
• At least one roof-shaped installation is provided on the wall below the separator, which leads the strands emerging from the separator along the wall into the two corners of the channel assigned to the wall. This results in two highly concentrated strands of solids, which retain their closed jet shape over greater heights even in countercurrent to the ascending gas stream laden with solids.
• the angle of inclination of the gutters themselves depends on the bulk material angle of the solids or dusts to be separated and is between approx. 30-60o, whereby in the normal case an inclination angle of 45 is provided
• FIG. 1 shows a partial section through the combustion chamber of a highly expanded fluidized bed furnace with a three-layer gutter separator and a drainage device arranged below the gutter separator for discharging the solids into two opposite corners of the combustion chamber,
• FIG. 2 shows a cross section through a gutter along the line II-II in FIG. 1,
• FIG. 3 is a top view of a gutter in the direction of arrows III-III in FIG. 1,
• FIG. 4 is a partial perspective view in the direction of arrow IV in FIG. 1,
• FIG. 5 shows a section through the assembly according to FIG. 4 along the line V-V and
• FIG. 6 shows a section along the line VI-VI in FIG. 4
• a gutter separator 2 which consists of three spaced-apart layers of gutters 3, the gutters 3 of one layer being offset from the gutters of the following layer, ie one so-called labyrinth separator is built.
• the individual gutter 3 consists of two vertical side walls 3a and 3b and a top surface 3c, so that a substantially U-shaped shape is given.
• Gutter-like catch pockets 4 are formed on the free edges of the side walls 3a and 3b. (See FIG. 2 and 3) The in FIG.
• connection duct pieces 7 are provided which are inclined with respect to the gutters 3.
• the connecting duct pieces 7 (see also FIG. 3, 4, 5 and 6) consist of side walls 7a and 7b of a top surface 7c and a bottom surface 7d.
• the top surface 7c extends from the end of the gutter 3 to the firebox wall 6.
• the bottom surface 7d has an angled portion 7d ', so that between the angled edge 8, the two side walls 7a and 7b and the firebox wall 6 a slit-shaped outlet opening 9 remains.
• an end plate 7e can be provided (see FIG. 3 and FIG. 6 above).
• adjacent connecting pieces extend between the adjacent side walls 7b and 7a, with an orientation towards the position and angle of the Top surface 7c or the bottom surface 7d, an upper baffle 10 and a lower baffle 11, which like the bottom surface 7d are each provided with an angled portion 10 'and 11', the corresponding edges 12 and 13 being spaced from the wall 6, so that slots 14 and 15 are formed.
• a continuous slot 16 is formed between the free edges of the bends 7d 'and 11d'.
• the solid streams that emerge from the outlet openings 9 are shown with thick solid lines.
• the thick lines limit the exit veil.
• the equalization of the strands emerging from the pockets 4 when passing through the outlet opening is not shown in the description.
• the baffles 10 also perform a dust-guiding function, since they deflect the solid impinging on them.
• FIG. 6 it makes sense to form a roof-shaped structure 18 on the otherwise flat top surface 7c, at least in the case of the lower separators, in order to avoid dust deposits in the connection region of the lower channel layer or layers on the combustion chamber wall 6.
• This structure can also be formed by appropriate shaping of the top surface 7c itself.
• FIG. 4 the partial gas flows branching off from the rising gas flow along the combustion chamber wall 6 are shown in dotted lines and flow through the slot 16 and the individual slots 19 which are established between the free edge of the bend 10 'of the guide plate 10 and the guide plate 11. Only one flows through the outlet openings 9 small amount of gas.
• the width of the slots 14 and 15 increases from top to bottom, so that the discharge cross section is increased in accordance with the increase in the separated solid.
• the increase from layer to layer depends on the cross-sectional size of the pockets and the total number of channel layers.
• one or more pipe stiffeners 21 are provided in the individual channel.
• the connecting duct piece 7 need not be formed separately from the gutter 3; e.g. the side walls and the top surface of the connecting piece can be formed integrally with the gutter.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Fluidized-Bed Combustion And Resonant Combustion (AREA)
• Separating Particles In Gases By Inertia (AREA)
• Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
• Incineration Of Waste (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6352347

Family Applications (1)

Country Status (6)

Family Cites Families (5)

• 1988
  • 1988-04-19 DE DE3813054A patent/DE3813054A1/de active Granted
• 1989
  • 1989-04-15 JP JP1504481A patent/JPH03503796A/ja active Pending
  • 1989-04-15 WO PCT/EP1989/000409 patent/WO1989010516A1/de not_active Application Discontinuation
  • 1989-04-15 EP EP89904797A patent/EP0413712A1/de not_active Withdrawn
  • 1989-04-15 AU AU34246/89A patent/AU3424689A/en not_active Abandoned
  • 1989-04-15 US US07/598,616 patent/US5082477A/en not_active Expired - Fee Related

Non-Patent Citations (1)

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