JPS62272086A - Filler for multitubular drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 6 Detailed Description of the Invention Field of Industrial Application The present invention relates to a multi-tube dryer that rotates around a stationary rotating shaft, the intrusion end wall of the multi-tube dryer A chute rotatably arranged between two guide walls in front, and a dam wall held above the chute so that its height can be adjusted;
The chute is provided with a bottom wall that cuts off the area between the guide wall and the intrusion end wall from below, and the distance between the chute and the damming wall is the same as that of the chute and the damming wall. It relates to a type that can be changed in view in the width direction.

PRIOR TECHNOLOGY In a filling device as described above, in which the material to be dried, in particular lignite, is fed, for example, through a closable funnel-shaped light head, the drying material is fed into a multi-tube dryer at the slowest possible sliding speed. It must then pass into the area of the entry end wall and then into the heating drying tube starting from this entry end wall.

Besides the possibility of varying the angle of inclination of the chute, the sliding properties of the dry material can be fully influenced by adjusting the height of the associated dam wall. By bringing the dam wall closer to the chute, the flow cross section through which the dry material moves towards the entry end wall is narrowed. Another possibility of influencing the slip V characteristics is by changing the spacing between the chute and the dam wall, viewed from the widthwise side of this chute and the dam wall, i.e. from the entry end wall side. can get. In particular, the chute and the dam wall are aligned with each other in such a way that their distance from each other becomes smaller and smaller around the axis of rotation of the multi-tube dryer.

Problem that the invention seeks to solve: To eliminate the difficulties in feeding dry material, especially when the dry material has a tendency to burn, even though the chute and the cooperating dam wall are adjustable. I can't. If the drying material becomes clogged, the entry of the drying material into the multi-tube dryer is potentially significantly hindered, thus reducing the drying efficiency. The proposal to loosen the dry material by means of a so-called swirl bed, that is to say by blowing compressed air from the entire bottom wall towards the end section of the chute on the dryer side, does not result in the desired improvement of the sliding properties of the dry material. Not yet.

It is therefore an object of the present invention to improve a filling device of the type mentioned at the outset to facilitate the movement of the drying material in the vicinity of the multi-tube dryer and to fully assist this movement. The filling device must also be configured such that slack in the drying material is created at least near the entry end wall of the multi-tube dryer.

Means for solving all the problems The present invention, which has solved all the problems mentioned above, has a shoot of '7'' o
- a blowing unit which, as an extension, projects beyond the entire chute end section on the dryer side, the blowing opening of this blowing unit being directed towards the entry end wall of the multi-tube dryer; and are arranged at an adjustable distance from the entry end wall.

Operation The basic idea of the invention is that the inlet end of the multi-tube dryer is assigned to a blowing unit that extends the chute in the transition area of the chute, that is to say in the area of the end section of the chute on the dryer side. The entire position of the blow opening directed towards the wall is at the point of being adjustable relative to the entry end wall. In this case, the blow opening is arranged and configured in such a way that the dry material is driven into the multi-tube dryer and at the same time the dry material layer is loosened in the area between the end section on the dryer side and the entry end wall. Ru.

Embodiment According to an embodiment of the invention, the blowing opening of the blowing unit is arranged on the underside of the chute (assumed extension straight). To achieve the desired acceleration of all the dried material in the direction of the multi-tube dryer, the blow openings are configured as a number of slits and are arranged offset from each other in a fan-like fashion towards the inlet end wall of the multi-tube dryer. obtained by

Advantageously, the blowing unit is constructed in a 6-4 configuration so that the angle of the blowing opening relative to the entry end wall can be varied. With this arrangement, the blow opening is brought to an angular position that produces a strong upwardly directed gas flow, if necessary. The blowing unit may be configured such that the outer contour formed by the plurality of blowing openings forms an acute angle with respect to the entry end wall, and/or the blow openings form an approximately acute angle with respect to the entry end wall when viewed in side view. It can also be configured to be oriented at right angles.

In order to ensure a uniform compressed gas loading over the entire width of the chute, the blow openings are configured differently in each group (especially in cross section) and/or in groups 15. are loaded with different compressed gases. The division into groups is necessary in order to adapt the action of the blowing unit to multi-tube dryers that rotate at different circumferential speeds. For example, the amount of gas supplied per time unit gradually increases as the distance from the rotation axis of the multi-tubular dryer increases, depending on the number of drying tubes that rotate per time unit. In this case, the amount of air supplied to the region of the outer drying tube will be several times the amount of air that is to be supplied to the region of the inner drying tube adjacent to the axis of rotation.

According to another embodiment of the invention, the blowing unit comprises a hollow member with a blowing opening, the length of which is approximately the same as the width of the chute. Also,
The hollow material is held by the chute in a soft manner in the longitudinal direction of the chute via a guide member. By shifting the hollow material all along the chute, the position of the blow openings is rotated around these blow openings, relative to the entry end wall of the multi-tube dryer, depending on the operating conditions, especially the drying material. Can be modified in detail to suit the special notes.

The effect of the blow opening on the dry material is that the dry material
By being pivotably fastened to the chute, additional changes can be made if necessary. This is achieved in particular by an arrangement in which the hollow member is movable about a pivot axis parallel to the lateral direction of the chute and can be fixed in different pivot positions.

According to another advantageous embodiment of the invention, the hollow chambers of the hollow material are arranged side by side and separated from each other into a number of sectors. Each of these sectors has its own supply conduit with nine valves and can be connected to a pressure source. By appropriately adjusting the throttle valves, different air quantities can be applied to the drying material via the respective sectors of the hollow material.

A bottom wall with upwardly turned bottom holes at least in the lower region of the chute end section on the dryer side? The operation of the filling device is optionally further improved in that the lower region of the bottom wall is supplied with compressed gas via the filling device. According to such an embodiment, the action of the blowing unit is assisted by a swirling bed of the type mentioned at the outset.

Embodiment Next, the structure of the present invention will be specifically explained with reference to the embodiment shown in the drawings.

The filling device connected to the front side of the multi-tube dryer 1 consists of a plate-shaped chute 2 with two lateral limiting guide walls 3 and this chute 2 as a known main part.
It has a dam wall 4 which acts like a breakwater and is placed above the dam. This dam wall 4 is a guide wall 3
It is held by a guide 5 provided in between so that its height can be adjusted in the direction of the arrow 6 (see FIG. 1).

The chute 2 is held by a guide wall 3 (and an attached member fixed to the guide wall 3) so as to be movable in the direction of the arrow 7 with the entire center of the pivot shaft 8 extending perpendicularly to the drawing plane.

An entry end wall 9 of the multi-tube dryer 1 is arranged on the lower side of the chute 2, opposite the chute end section 2a.

This entry end wall 9 has a drum-like outer shape. The drying tube 10 starting from this entry end wall 9 rotates together with this entry end wall in a clockwise direction (in the direction of the arrow 11 in FIG. 2) about a fixed rotation axis 12. This rotating shaft 12 is
Like the drying tube, it is slightly inclined to the horizontal. Heating of the drying tube takes place with a gaseous heating medium.

This gaseous heating medium is supplied in the area of the rotating shaft 12 and flows through the drying tubes in the inner chamber of the multi-tube dryer drum body.

The n-th pivotable guide wall 3 ends at a small distance from the rotating entry end wall 9.

The angle of inclination of chute 2 with respect to the horizontal is
The tilt angle is adjusted to a small angle as follows by the pivot arm 8a acting on the guide wall 3 (and the guide wall 3). Tsu-! As a result, the drying material (for example, wet lignite B, B') reaches the entry end wall 9 at the slowest possible rate of deterioration and yet reliably, and at this entry end wall 9 the drying tube 10 in which the drying operation is carried out is connected. It is adjusted to the extent that it is introduced. The sliding process is adjusted by moving the dam wall 4 up and down. By moving the dam wall 4 up and down, the flow cross section of the dry material can be increased or decreased. The lignite is loosened near the intrusion end wall.

This loosened range is indicated by the symbol B'. In the illustrated embodiment (see FIG. 2), the chute 2 and the damming wall 4 are such that the distance between them is equal to
They are arranged with respect to each other in such a way that they become gradually smaller towards 2. If the lower edge 4a of the dam wall 4 is arranged horizontally, the chute 2 will be arranged so as to gradually rise at a gentle angle toward the rotating shaft 12 (see Fig. 2).
, it may be configured to be able to turn around a plane perpendicular to the drawing plane. A bottom wall 13 is fixed between the guide walls 3. This bottom wall 13 cuts off the range 1f between the guide wall and the entry end wall 9 from below on the lower side of the chute 2 (see FIG. 1). This bottom wall 13 can also be used, if necessary, to form a so-called swirl bed.

In order to improve the operation of the filling device with the main components 2, 3, 4, 13', and thus also the overall economy of the multi-tube dryer 1, a blowing unit 14 is provided on the underside of the chute 2.
is fixed.

This blow unit 14 has a hollow member 15 with a blow opening 15a in the area of the chute end section 2a on the dryer side. This hollow member 15 extends as an extension beyond the chute end section 2a on the dryer side;
The width of the hollow member 150 is configured to extend over at least substantially the entire recess of the chute 2 (in the direction perpendicular to the drawing plane of FIG. 1).

Hollow material 15 formed by blow opening 15a
According to FIG. 1, the outer contour 15b on the side of the entry end wall 9 extends approximately parallel to the chute 2, and
and form an acute angle α.

Fine adjustment of the position of the hollow member 15 relative to the components of the chute 2 and the entry end wall 9 is obtained as follows. The hollow material 15 is the guide rod 16 (see Figure 6).
, and this guide rod 16 itself (for example via a rank gear transmission or cylinder arrangement)
This is obtained by being held longitudinally movable in a guide support 17 on the underside of the chute 2.

The resulting shiftability of the hollow member 15 is indicated by the arrow 18 in FIG. By moving the hollow member 15 parallel to the chute 2, the spacing between each blowing nozzle 15a (which, viewed in side view, is oriented approximately at right angles to the entry end wall 9) is It can be finely modified to adapt to the particular operating conditions, and to adapt to the properties of the lignite to be dried.

The blowing openings 15a of the hollow material 15 are preferably constructed as slots and are pushed together (in an armored manner) towards the inlet end wall 9 of the multi-tube dryer 1, which passes through the blowing openings 15a. It is shifted. The lower blow opening thus extends further into the entry end wall than its upper blow opening (see especially Figures 3 and 4).
.

By interlocking the rotation of the multi-tube dryer 1 in the direction of the arrow 11 (see FIG. 2), when the drying tubes 10 are uniformly provided on the intrusion end wall 9, the area outside the vicinity of the rotation axis 12 is A significantly large number of drying tubes cover the area of the blow opening per unit of time. The main feature of the present invention is that the core chamber of the cored material 15 has an intermediate wall 15c (see FIG. 6);
By partitioning rLl into a large number of mutually independent sectors 15d, 15e, 15f, and 15g arranged in parallel, the blow unit 7 can be controlled in its respective operating state.
The advantage is that it can be adjusted to suit the characteristics of the lignite to be dried. Each sector has a throttle valve 19'eOii?
It can be connected to a pressure source via its own supply conduit 20.

By adjusting the throttle valves 19 in different ways, it is thus possible to supply a gradually decreasing amount of air towards the axis of rotation 12 via the associated sectors 15d, 15gk. Alternatively or additionally, the blow openings in each sector may be configured with different shapes. This is in simple form, with each sector provided with a respective blown cross-section gold rotating shaft 12.
This is achieved by configuring the sector force gradually from sector to sector.

By using all of the blowing units 14 and by arranging the blowing openings as described above approximately at right angles to the entry end wall 9, the lignite to be dried can be transported within the delivery range of the chute 2, i.e. by drying. It is not only loosened in the area of the end section 2a on the machine side, but is also progressively accelerated, in particular towards the entry end wall and the drying tube 10 starting from this entry end wall. This largely avoids the risk of burning or clogging in the particularly dangerous delivery area. The pressure source supplying the supply conduit 20 with compressed gas (usually air) is designated at 21 in FIG. 1 (schematic diagram).

The filling device according to the invention furthermore provides that the bottom wall 13 has an upwardly aligned bottom hole 13at in the lower region of the dryer-side end section 2a of the chute 2, in which the pressure box 2
2 is formed.

This pressure box 22 is loaded with compressed gas metered in via both a pressure line 23 and a throttle valve 24 . This compressed gas is drawn off, in particular, from a pressure source 21 (see FIG. 1).

In order to adapt to different operating conditions, the pressure box 22 (depending on the construction of the hollow member 15) is divided into a number of sectors arranged side by side and in each case partitioned from one another.

In this case, these sectors are each formed with a different shape and/or have differently arranged bottom holes 13ak.

In the first embodiment of the present invention described so far, the hollow member 15 can be shifted only in the longitudinal direction of the chute 2.

By suspending a hollow member 15 (see FIG. 4) on a guide rod 16 so as to be able to pivot around 1IO25, and using appropriate fixing members for this hollow member 15 and the guide rod 16, Position i of slit-shaped blow opening 15a
The possibility of additional adjustment is obtained. Hollow wood 15
The fully pivotable arrangement presupposes that the supply conduit 20 is sufficiently movable or of a flexible design at the connection with the hollow member 15.

By pivoting the hollow member 15 relative to the chute 2, the angle α between the outer contour 15b and the entry end wall 9 is
is changed, thereby also changing the alignment of the blow opening 15a with respect to the entry end wall 9. In this way, it is possible to additionally influence the action of the blowing unit 14 on the brown coal introduced into the shell dryer. This means that more or less influence can be exerted by adjusting the gas flow (usually air flow) directed upwards.

Effects As described above, according to the filling device for a multi-tube dryer of the present invention, it is possible to more easily interlock the drying materials in the vicinity of the multi-tube dryer according to the respective operating conditions, and to It is also possible to create slack in the drying material near the entry end wall of the multi-tube dryer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic vertical sectional view of a filling device according to an embodiment of the invention, connected forwardly to a multi-tube dryer;
The figure is a sectional view taken along the line ■-■ in FIG. 1, and the third figure is a plan view of the terminal section on the dryer side of the chute and associated blow unit shown in FIGS. 1 and 2. The 4th is the 1st
FIG. 2 is an enlarged view of the dryer-side end section of the swingably held blow-unisof chute of the filling device shown in FIG. 1...Multi-W E image area, 2...Chute, 2a...Chute end section, 3...Guide wall, 4...Damming wall, 4a...Lower edge, 5...Guide, 6,7 ...-arrow,
8゜8a...Swivel axis, 9...Intrusion end wall, 10...Drying tube, 11...Arrow, 12...Rotation axis, 13...Bottom wall,
13a・Bottom hole, 14・・Blow unit, 15・・
Hollow material, 15a, blow opening, 15b, outer contour, 15c, intermediate wall, 15d, 15e, 15f,
1'5g...Sector, 16...Guide rod, 17
... Guide support material, 18 ... Arrow, 19 ... Throttle valve, 20 ... Supply conduit, 21 ... Pressure source, 22 - Pressure box, 23 ... Pressure conduit, 24 ... Throttle 9 Valve, 25・Shaft,
B, B'・・・Lignite

Claims (1)

[Scope of Claims] 1. A multi-tube dryer (1) that rotates around a fixed rotating shaft (12), the intrusion end wall (1) of the multi-tube dryer (1)
9), a chute (2) rotatably arranged between two guide walls (3), and a damming wall (4) held above the chute (2) so as to be adjustable in height; On the underside of the chute (2) there is a guide wall (3) and an intrusion end wall (9).
A bottom wall (13) that cuts off the area between the
The chute (2) and the dam wall (4) are provided.
) in which the distance between the chute (2) and the dam wall (4) can be changed when viewed from the widthwise side of the chute (2) and the dam wall (4), the chute (2) being equipped with a blow unit (14), The blowing unit (14) projects as an extension beyond the chute end section (2a) on the dryer side and has a blowing opening (1) of this blowing unit (14).
5a) is directed towards the entry end wall (9) of the multi-tube dryer (1) and is arranged at an adjustable distance with respect to this entry end wall (9), Filling device for multi-tube dryer. 2. Filling device according to claim 1, wherein the blow opening (15a) is arranged below the chute (2). 3. The blow openings (15a) are configured as a number of slits and are arranged offset from one another in a fan-like fashion towards the entry end wall (9) of the multi-tube dryer (1). The filling device according to item 1 or 2. 4. The filling device according to any one of claims 1 to 3, wherein the angle of the blow opening (15a) with respect to the entry end wall (9) is variable. 5. The outer contour (15b) formed by the plurality of blow openings (15a) forms an acute angle (α) with respect to the entry end wall (9).
), the filling device according to any one of claims 1 to 4. 6. According to any one of claims 1 to 5, wherein the blow opening (15a) is oriented approximately at right angles to the entry end wall (9), seen in side view. filling equipment. 7. The blow opening (15a) according to any one of claims 1 to 6, wherein the blow opening (15a) is configured differently for each group when viewed from the width direction side of the chute (2). Filling device. 8. The blow openings (15a) are loaded with different compressed gases for each group when viewed from the widthwise side of the chute (2);
A filling device according to any one of claims 1 to 7. 9. The blow unit (14) has a blow opening (15a)
Claims 1 to 8 have a hollow member (15) with a width of the hollow member (15) substantially equal to the width of the chute (2). The filling device according to any one of the preceding items. 10. The hollow material (15) is the guide member (16, I7
10. The filling device according to claim 9, wherein the filling device is held in the chute (2) so as to be shiftable in the longitudinal direction of the chute (2) via the chute (2). 11. Claim 9 or 10, wherein the hollow member (15) is rotatably fixed to the chute (2).
Filling equipment as described in section. 12. The hollow chambers of the hollow material (15) are arranged in parallel,
A number of sectors (15d, 15e, 15
f, 15g) and these sectors are connectable to a pressure source (21) via their own supply conduit (20) with a throttle valve (19). The filling device according to any one of items 9 to 11. 13. Via a lower wall (13) with upwardly directed bottom holes (13a) in at least the lower region of the chute end section (2a) on the dryer side; The filling device according to any one of claims 1 to 12, wherein compressed gas is supplied at a metered amount.