DE2517131A1 - DISCUSSION FAN DEVICE FOR PULPY FABRIC - Google Patents

Description

PATENT LAWYERS

HELMUT SCHROETER KLAUS LEHMANN

DIPL.-PHYS. DIPL.-INC.

Ingersoll-Rand Company ir-3> 5

April 17, 1975 BB / P

Chopping blower device for pulp-like material

The invention relates to a disintegration blower device for pulp-like substances according to the preamble of claim 1.

The device according to the invention is particularly suitable for Chopping up and blowing off e.g. pulp and in particular for e.g. a plant in which the pulp is outside a Reaction kettle is broken up and then blown into this reaction kettle in order to react in it with a gas step.

An object of the invention is to provide a dismemberment blower device, which is particularly suitable for pulp, through the pulp outside of a gas reactor vessel can be dismembered and then blown into this, the dismemberment in a more effective manner than with known devices In addition, this device is essentially intended to avoid the undesired formation of lumps of pulp will.

A solution to this problem is given by claim 1.

AusfUhrungsbeispiele the invention are based on the following of the drawings.

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D-707 SCHWÄBISCH GMÜND COMMON ACCOUNTS: D-8 MÖNCHEN 70 Telephone: (07171) 56 90 Deuuche Bank Munich 70/37 369 (BLZ 700 700 10) Telephone: (0 89) 77 »9 5t H. SCHROETER telegrams: Sdiroeptt Sdiwtbixh Gmünd 02/00 535 (BLZ 413 700 86) K. LEHMANN telegrams: SdiroepK Bo & guK 49 Telex: 7248 868 pigd d PoKxfocfckonto Munich 167941-804 LipowikyitrA 10 Telex: 5 212 248 p »wt d

Pig.l shows a side view of an embodiment in part of which is shown in section.

Fig.2 shows an end view of the embodiment according to Pig.l, in which a part is broken away and shown in section.

Fig.j5 shows a partial section of the dismembering device on a larger scale.

FIG. 4 shows, on a larger scale, another partial view of the Dismemberment device.

Figures 5 and 6 are partial views of other embodiments of the Disintegration device that can be used together with the device according to Fig.l.

The embodiments of the invention shown in the drawings are particularly suitable, together with a To be used gas reaction kettle.

According to FIGS. 1 to 4, the device has a housing 10 in which a disk-like, rotatable partition wall 12 is arranged which is hereinafter referred to as the rotor. The rotor 12 divides the housing 10 into a fan chamber 14 on one side of the rotor 12 and a material chamber 16 on its opposite side. The rotor 12 has a circumferential distance of the parts of the device adjoining there in order to create an annular space 18 over which the chambers 14 and 16 are in communication with one another along the circumference of the rotor. The rotor 12 is fixed to a fastening device 20 Arranged at the end of a shaft which is connected on the other side to another shaft 22 for driving. The shaft 22 is

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rotatably held in bearings which are arranged in a bearing housing 24. You can also use a normal drive motor (this is not shown), which engages at its end 26, are driven.

The blower chamber 14 protrudes through an axial opening 28 in a housing wall 30 in connection with an injection chamber 32, which is also contained in the housing 10. A blow-in feed 34 is provided in the housing 10, which is connected to the chamber 32 and a gas supply source, not shown, to the continuous supply of gas is in communication. For example, the gas reaction vessel itself could be used as the gas source to serve. A fan is fixedly arranged on the rotor 12 in the blower chamber 14, the fan being in the The embodiment shown here is composed of a plurality of radially extending wings 36 arranged in an arc at a distance . The fan blades 36 are fastened to the fastening device 20 at their inner ends. During their common rotation with the rotor 12, the gas introduced into the blower chamber 14 through the annular space 18 on Scope of the rotor 12 promoted.

The housing 10 is provided with a material inlet 38 which opens centrally into the chamber 16 and as shown is arranged coaxially to the rotor 12. Through the material inlet 38 is continuous during operation of the device Pulp or other material is fed to the chamber 16. The material inlet 38 is through a material feed 40 with a Supply (not shown) of pulp or other material connected. The feed 40 has a material inlet 38 narrowing or inclined section in cross section. A drivable shaft 42 is coaxial in the inclined Section of the feed 40 arranged. At this

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A transport compression screw 44 is attached to the shaft and rotates continuously during operation of the device. As a result, material is continually forced into the tapered portion of the feeder by screw 44 to form a plug of compressed material in feeder 40 upstream of material inlet J> 8 . This prevents gas from escaping from the housing 10 through the feed 40 and prevents undesired gases from penetrating into the housing 10 through the feed 40. The screw 44 simultaneously transports the plug of material through the material inlet 38 into the material chamber 16.

Immediately following the material inlet 58 and in the Material chamber 16 centric to rotor 12 are on the attachment !: device 20 a plurality of radially extending, knife-like elements or cutting edges 46 attached, which are used to cut through the compressed material entering the material inlet 38 to break open or to dismember. On rotor 12 are a plurality of generally radially extending vanes 48 in the material chamber 16 fixedly arranged around the cutting edges 46. The wings 48 define generally radially extending pockets or channels 50. The inner ends 52 of the wings 48 are arcuate, general arranged centrally to the rotor 12 at a distance from one another, so that the fragmented or loosened material reaches the inner ends the channels 50 can be supplied. The outer ends 54 of the Vanes 48 are arcuately arranged over the circumference of the rotor 12 at a distance from one another, so that the loosened material during the rotation of the vanes 48 from the channels 50 at their outer ends 54 can be delivered due to the speed of rotation. The sides of the channels 50 adjoining the rotor 12 are over their entire length is closed off by the rotor 12 in relation to a direct connection to the blower chamber 14. However, they are opposite sides of the channels 54 open for a purpose which will be described later.

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A material discharge opening 56 is provided on the housing 1O ₁ , which is connected to the material chamber 16 for conveying the fragmented material out of the housing 10. The material discharge opening 56 is assigned a discharge spiral 58 which is arranged axially at a distance from the material chamber 16 and the vanes 48 present in it. The vanes 48 lie completely outside the spiral 58. The annular housing wall 60 which surrounds the vanes 48 is at a constant, uniform distance from the outer ends 54 of the vanes 48 over its entire, curved course. The spiral 58 is along its inner circumference 62 to the material chamber 16 and to the open sides of the channels 50 between the wings 48 open. The material shredding device of the device is generally designated 64 and is arranged in the material chamber 16 at a radial, outwardly facing distance from the outer ends 54 of the blades where the material discharged from the channels 50 between their outer ends 54 reaches. The blades 48 can rotate relative to the material shredding device 64. The device 64 is particularly suitable for comminuting the material by impinging it on this device, at the same time causing the material to move inwardly towards the outer ends 54 of the vanes 48. In addition, a retaining device, indicated generally at 66 , is disposed between the material chopping device 64 and the material conveying device of the apparatus in order to retain heavier, coherent or only partially fragmented material so that it does not reach the material dispensing device.

According to FIGS. 1 to 4, the material dismantling device 64 a wavy curved fragmentation ring 68, the Over its entire length formed alternately with inwardly protruding elevations 70 and outwardly pointing depressions 72 is. The ring 68 is fixed to the annular housing wall 60

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and extends around the vanes 48 at a distance from the outer ends 54, forming an annular space 74. The space 74 communicates on opposite sides with the space 18 around the rotor 12 and the discharge spiral 58. The gas blown from space 18 flows across space 74 to discharge spiral 58 to blow light, chopped material into the latter. Due to the wave-shaped design of the fragmentation ring 68, the material emerging from the channels 50 is fragmented when it interacts with the ring 68, while at the same time there is an inward movement of the material from the ring 68 to the outer ends 54 of the wings 48, whereby the easy , fragmented material is moved inwardly to a location so that it is readily blown past the retainer 66 to the spiral 58 described below.

The retaining device 66 has an annular ramp 76 which is fastened to the housing wall 60 and which is arranged between the fragmentation ring 68 and the spiral 58 immediately adjacent to the fragmentation ring 68. The ramp 76 runs obliquely upwards or at an inclination from the ring 68 to the spiral 58, as a result of which material adjoining the inner circumference 68 must overcome the ramp 76 in order to get into the dispensing spiral 58. As a result, ramp 76 retains or delays heavy material from entering spiral 58, causing this heavier material to be retained on ring 68 to be broken up into lighter material. The ramp 76 also prevents the formation of lumps of material which would otherwise inevitably occur at this point. Such lumps of material are very undesirable, in particular because the material deposited in this area would loosen in the form of lumps.

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The retaining device 66 also includes an inwardly projecting, annular wall 78 which is positioned between the Ramp 76 and the spiral 58 is arranged. The wall 78 defines the open side 62 of the spiral 58 and extends further inward than the innermost end of ramp 76, in order to prevent the continuation of heavier material from the upper end of the ramp 76 into the spiral 58. According to the Figures 1 through 4 may include the dismemberment ring 68 and ramp 76 both as previously described the housing wall 60 be attached. On the other hand, however, it is according to Fig. 5 * in which the same parts with the same Reference numerals to which, however, an "a" has been added, denotes are also possible to form the ramp 76a in one piece with the housing wall 60a.

In FIG. 6, the same parts are denoted by the reference numerals provided with an additional "b". The dismemberment ring 68b may be formed as an annular array of generally diamond-shaped elements 78 which are attached to the housing wall 6Ob around the Wing 48 is attached around in a manner similar to that of the ring 68 already described. In this case, the already described retaining device 66 and the remaining parts of the device formed in the manner already described be.

When the device according to FIGS. 1 to 4 is used for chopping up and blowing off pulp in papermaking, the shaft 22 is continuously driven so that the rotor 12, the blades 48, the knife-like parts 46 and the fan blades 36 continuously rotate. Gas is continually supplied to the injection chamber 32 and into the blower chamber 14 from which the rotating fan blades 56 direct the gas at a relatively high speed through the annular spaces 14 and 74 to make chopped up pulp into the discharge spiral

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and blow out of the housing 10. Pulp to be processed is continuously fed through the guide 40. The conveyor screw 44 is continuously driven to make pulp as impermeable as possible upstream of the Compress material feed 38 while at the same time the compressed pulp plug is introduced into the material chamber 16 through the inlet 38. The knife-like ones Elements 46 chop up or shred the supplied pulp. The shredded pulp gets out between the inner ones Ends 52 of the wings 48 and thus in the channels 50 formed by them. The rotation of the wings 48 causes the pulp to open accelerates a relatively high speed as the pulp passes radially outwardly through the channels 50. The pulp is discharged outwardly from the channels 50 between the outer ends 54 of the vanes 48 at a relatively high speed, that by the speed of rotation of the outer ends 54 is conditional. The direction of discharge of the pulp from the area between the outer end 44 of the wing 48 is shown schematically by the dashed arrow in Figure 4, the direction of rotation the rotating wing 48 is indicated by the solid arrow. The pulp discharged hits with its relatively high Speed on the dismemberment ring 68.

The impact of the pulp on the ring 68 divides the dispensed pulp into smaller, lighter fiber groups, and in some cases even creates individual fibers which fall back inwardly onto the outer ends 5 ^ of the wings 48 in an area from which they can be blown rapidly over the retainer 66 and through the dispensing coil 58. The heavier lumps of pulp, however, are not blown over the retaining device 66 and cannot climb over the ramp 76 and the partition wall 78. They re-interact with the fragmentation ring 68 until they finally split into lighter fiber groups or fibers

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have been dn the spiral in the already described Way to be blown.

Since the sides of the channels 50 adjoin the spiral 58 are open to this, a return of part of the gas through the channels 50 is obtained supports the conveyance of shredded material. Since the spiral 58 is arranged axially at a distance from the vanes 48, with the latter lying outside the spiral 58, the space 74 has a constant cross-section, with the exception that its Cross-section through the wave-shaped configuration of the fragmentation ring 68 is changed. So you get a uniform treatment of the pulp in the material chamber 16. The pulp accumulation that normally occurs in the area of the Ramp 76 is prevented by the latter. Extremely quick separation of the light, shredded pulp of the heavier, coherent or only partially shredded pulp is achieved by the high speed, with the lighter pulp from the space 74 blown into the spiral 58 will.

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Claims (15)

PATENT CLAIMS Chopping blower device for pulp, in particular, with a housing, a rotatable one assigned to the housing Drive shaft, a separating device, through which the housing into a material chamber on one side of this separating device and a blower chamber is divided on the other side, with one centered with the material chamber material feed device arranged to the separating device for feeding material into the material chamber, with a gas inlet connected to the blower chamber and with several wings in the material chamber, the inner ends of which are generally centered to the separating device and at a distance are then arranged at their outer ends on the circumference of the separating device, the drive shaft with the Wings for their rotation is connected * with a material dismantling device, which is connected to the wings for Collaboration of material escaping to the outside between them cooperates with a material dispensing device for Removal of fragmented material from the material chamber, with a feedthrough arranged on the circumference of the separating device for a gas flow from the blower chamber into the material chamber, whereby the blown gas disintegrates the Material can be fed to the material dispensing device, thereby characterized in that the material dispensing device (64) at a distance outside the outer ends (54) the wing (48) and located in the area in which material is dispensed from the spaces between the outer ends (54) and in that the material disintegrating device (64) is arranged around the outer ends (54), whereby on them impinging material can be crushed and also moved inwardly in the direction of the outer ends (54), and that S09848 / 0719 There are locking devices (66, 76, 78) between the material shredding device (64) and the material delivery device (56, 58), by means of which the movement of heavier material from the material shredding device (64) to the material delivery device (56, 58) can be prevented. 2. Apparatus according to claim 1, characterized in that the locking device (66, 76, 78) has a ramp (76) which extends towards the material discharge device (56, 58) at an angle. 3. Device according to claim 1, characterized in that that the locking device (66, 76, 78) has a partition (78). 4. Device according to at least one of the preceding claims, characterized in that the ramp (76) is circumferentially to the separating device (12) and then is arranged on the material disintegration device (64), wherein the material discharge device (56, 58) is a discharge spiral (58), which is arranged axially at a distance from the wings (48), and that the partition wall (78) extends inward extends from the ramp (76) and delimits one side of the dispensing spiral (58). 5. Device according to at least one of the preceding claims, characterized in that the wings (48) relative to the material disintegrating device (64), the Ramp (76) and the partition (78) are rotatable. 6. Device according to at least one of the preceding claims, characterized in that the material delivery S09848 / 0719 means (56, 58) has a "dispensing spiral (58) which is axially spaced from the vanes (48). 7. Device according to at least one of the preceding claims, characterized in that the separating device (12) has a rotor which is connected to the drive shaft (22) in Drive engagement is. 8. The device according to at least one of the preceding claims, characterized in that a rotatable fan device (36) in the blower chamber (14) through which the flow of blown gas from the blower chamber (14) is supported in the material chamber (16) by the guide area (18). 9. Device according to at least one of the preceding claims, characterized in that means (46) in the housing (10) between the inner ends (52) of the blades (48) and the material feed (38) is arranged through which the material fed through the material feed (38) can be comminuted is before this material gets to the inner ends (52). 10. The device according to claim 9 *, characterized in that that the wings (48) extend generally radially on the separator (12) at locations around the Material disintegration device (46) are distributed, and that the device (46) for rotation with the wings (48) connected is. 11. Device according to at least one of the preceding claims, characterized in that the material disintegrating means (64) during the operation of the Device is fixed. · 509848/0719 - 13 - ir-35 12. The device according to at least one of the preceding claims, characterized in that it rejects the material disintegrating device (64) has a ring formed with projections and depressions, which ring extends around the wings (48). 13 · Device according to at least one of the preceding Claims, characterized in that the material disintegration device (64) has several disintegration elements which are spaced from one another around the wings (48). 14. The device according to at least one of the preceding claims, characterized in that it rejects those connected to the material dispensing device (56, 58) Sides of the channels (50) between the wings (48) are open to this device. 15. Device according to at least one of the preceding claims, characterized in that the material shredding device (64), the ramp (76) and the wall (78) be carried by the housing (10). rt q α /. ö / η 11 α Blank page