JP2749476B2 - Crushing and feeding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, for example, relates to municipal solid waste, and industrial waste utilization is that broken砕給dust equipment as feeder incineration for various incinerated into the fluidized bed furnace.

[0002]

2. Description of the Related Art In a fluidized bed incinerator, it is necessary to crush the incinerated material to an optimum size (reducing the size of the incinerator, making the particle size uniform, etc.) and supply the incinerator with a fixed amount. Conventionally, a duster and a crusher are required. The duster and the crusher are separately arranged according to the purpose, and a method of connecting them with a conveyor is mainly used. There are also devices that combine a duster and a coarse crusher. Furthermore, as shown in Japanese Patent Publication No. 53-47932, for example, a grid is provided outside a rotor having a hammer, and the raw material from a raw material input port is impact-crushed by the hammer and the grid, and cannot be crushed. There is also provided an apparatus for discharging foreign matter from a movable damper portion.

[0003]

According to the conventional type in which the above-mentioned duster and the crusher are connected by a conveyor, the duster and the crusher often swing up and down, and a large installation space is required. In addition to the complexity and size of the system, there was a problem in pollution and hygiene due to spills and odors at each connection. In addition, according to the conventional type in which a duster and a coarse crusher are combined, the quantitative supply by extrusion with a pusher is unstable, and the crusher has a single shaft, so that sufficient crushability cannot be obtained, and large lumps are formed. If the furnace enters the furnace or falls, it may not be able to follow the control, especially in a fluidized furnace with fast burning, which hinders combustion and instability and fluidization, causing problems such as an increase in unburned fuel and the generation of pollutants. there were. Further, in the case of the conventional type in which the rotor and the grid are combined, sufficient friability cannot be obtained because the rotor has one shaft.

[0004] It is an object of the present invention, provide a sufficient friability, moreover unsuitable material can not be crushed together may discharged out of the system, to provide a compact fracture that obtained constitutes the砕給dust facilities across On the point.

[0005]

Means for Solving the Problems] This in order to achieve the above object
The crushing and dusting equipment of the invention comprises a feed hopper for incinerated material,
Pusher that faces the outlet of the supply hopper from the side
Device and outside of the push end by this pusher device
The falling path of the formed incineration material and below this falling path
The twin-screw crusher that has been installed
And a discharge hopper for incinerated waste, wherein the twin-screw crusher comprises:
Turning the large diameter main cutter and small diameter sub cutter forward and backward
The cutters are arranged in a freely rotatable manner.
The incineration material from the road is crushed and crushed and then discharged downward.
Adjacent to the discharge hopper and outside the sub cutter.
An unsuitable object discharge path is formed facing the lower part of the
An unsuitable material discharge damper facing the outside upper part of the
doing.

[0006]

[0007]

According to the action Such This onset Ming configuration, incinerated from dropping path reaches between both cutters. Here, both cutters are rotating forward to pinch and crush the incinerated material and drop the crushed material and the like contained in the incinerated material down to the optimum size while reducing the soul. Therefore, since the incinerated material is reduced to an optimal size, it can be supplied to the incinerator without clogging and in a uniform amount, and combustion can be stabilized.

During the work of crushing and crushing, when the object to be crushed gets stuck between the two cutters and stops moving, the forward and reverse rotations of both cutters are repeated a plurality of times. As a result, when the object to be crushed can be crushed, the intended forward rotation is continued.
When crushing cannot be performed due to inappropriateness, both cutters are reversely rotated based on detection of torque of both cutters. Then, since the sub-cutter has a small diameter, unsuitable objects can get over the sub-cutter and be discharged out of the system, thereby preventing the occurrence of bridges on the discharge path side to the incinerator and protecting both cutters. I can do it.

[0009] or incinerated charged into the supply hopper,
The lower layer located below the outlet is supplied to the falling path by the operation of the pusher device. At the time of fixed-quantity supply by this pusher device, the amount pushed using the cushion of incinerated material falls into the twin-screw crusher side at a time, or when the pusher stops, the incinerated material in the supply hopper is crushed by its own weight. It can be prevented from dropping to the side and can always be supplied in a fixed amount.

[0010] The incinerated material pushed out by the pusher device in this manner falls on the falling path, and at this time, the unsuitable material discharge damper is closed, whereby the incinerated material falling on the falling path is removed by the two cutters. Will lead you in the meantime. The incineration that has been reduced to the optimal size by both cutters is
A fixed amount is supplied (dropped) to the discharge hopper. At this time, the crushing crushing is performed because the incinerated material is always supplied in a fixed amount.
The load of both cutters is averaged to perform crushing with good crushability. Then, the incineration is supplied to the incinerator. And when the unsuitable material cannot be crushed, the unsuitable material discharge damper is opened based on the detection of the torque of both cutters,
By rotating both cutters in reverse, the unsuitable object is moved over the sub-cutter to the unsuitable object discharge path, dropped and discharged.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. The crushing dust supply equipment has a supply hopper (cushion hopper) 1 at an upper portion, and the incineration material (including the crushed material) A is charged into the supply hopper 1 by, for example, a crane device. Outlet portion 2 which is integrated into the bottom of the feed hopper 1, a tip portion (lower end portion) 2A and is inclined toward the one side, and its tip angle of inclination theta ₁ 55
It is set to 60 degrees.

A pusher device 5 is disposed below the outlet 2 so as to face the other side. This pusher device 5
Is composed of a bottom plate 6 also serving as a cover frame, a pusher 7 slidable on the bottom plate 6, a cylinder device (operating device) 8 for reciprocatingly sliding the pusher 7, a cover frame 9, and the like. Here the bottom plate 6, as the inclination direction of the tip portion 2A (one side end) is lower, is inclined to the bottom plate inclination angle theta ₂ as 5-10 degrees.

The supply hopper 1 and the bottom plate 6 are supported by a machine frame 10, and at this time, a cylinder device 8 that is linked to an outer end of a pusher 7 is also supported by the machine frame 10. Here, the stroke of the cylinder device 8 is such that the pressing surface 7a formed on the inner end of the pusher 7 reciprocates between the position below the other side portion of the tip 2A and the position below the one side portion. Is set to When the pusher 7 is moved to a position below one side portion of the bottom plate 6, the pushing surface 7a is set at a position approximately half the length of the receiving surface of the bottom plate 6 when the pusher 7 moves to a position below the one side portion. , So that the pressing surface 7a does not protrude forward of the bottom plate 6.

A television seat 11 is opposed to an outlet (one side) formed by the front end 2A and the bottom plate 6 and facing in one direction (lateral direction).
A cover frame 12 having the following structure is provided. The cover frame 12 has a lower portion opened to form a falling path 13. Here, assuming that the lower end width of the supply hopper 1 is W, the stroke of the pusher 7 is approximately 1 W, the height of the outlet formed by the tip 2A and the bottom plate 6 is 1 W, and the width of the falling path 13 is 1 W. .

A biaxial crusher 15 is provided below the falling path 13. That is, the two-shaft crusher 15 has
The main body is constituted by a cover frame 16 which communicates with the main body and has a lower part opened, and a large-diameter main cutter 17 and a small-diameter sub-cutter 18 are juxtaposed in the cover frame 16. These cutters 17 and 18 are of a rotor type, and have lateral drive shafts 19 and 20 rotatably supported on the cover frame 16 side via a bearing device, and a drum externally fitted and fixed to the drive shafts 19 and 20. The crushing blades 21 and 22 include a plurality of crushing blades 23 and 24 projecting from the outer periphery of the drums 21 and 22. The crushing blades 23 and 24 are juxtaposed so as to overlap each other.

Here, the diameter d of the sub-cutter 18 is set to 2/3 to 1/2 with respect to the diameter D of the main cutter 17, and the horizontal axes 19 and 20 are set at the same level. An unsuitable discharge space S is formed. The diameter D of the main cutter 17 is approximately equal to the lower end width W of the supply hopper 1 described above. And both cutters 17, 18
Is the direction in which the incinerated material A from the falling path 13 is pinched and crushed,
That is, the rotation of the sub-cutter 18 is set to 1.5 to 3 times the rotation speed of the main cutter 17 by interlocking with the driving device (not shown) so that the direction of the solid arrow is forward rotation and forward and reverse rotation. It is twice as fast.

In order to scrape the incinerated material A entangled with the crushing blades 23, 24 of the cutters 17, 18, these cutters 1
Scrapers (claws) 25 and 26 that wrap around the crushing blades 23 and 24 are provided opposite to the lower side of 7 and 18.

A discharge hopper 30 for the incinerated material A is disposed facing the whole of the main cutter 17 and almost half of the inside of the sub-cutter 18 from below.
Is connected to a chute 32 via a seal damper 31. An unsuitable material discharge path 33 is formed by a tubular body 34 at a position adjacent to the discharge hopper 30 and opposed to a lower portion outside the sub cutter 18 from below. Further, within the cover frame 16 and at the portion of the discharge space S, a swinging motion is provided between a position where the discharge space S is closed near the upper outside of the sub-cutter 18 and a position where the discharge space S is opened. A flexible inappropriate object discharge damper 35 is provided.

The operation of crushing and feeding the incinerated material A in the above configuration will be described below. The lower layer located at the tip 2A of the incineration material A charged into the supply hopper 1 is received by the bottom plate 6. Then, by operating the cylinder device 8 to reciprocate the pusher 7 on the bottom plate 6, the lower incinerated material A is extruded through the pressing surface 7 a and is supplied to the falling path 13 in a constant amount. When this way is performed the extrusion feed of the material to be incinerated A, from the fact that the bottom plate 6 as described above, the bottom plate inclination angle theta ₂ is inclined as 5-10 degrees,
It is possible to prevent dust and sewage from flowing back to the cylinder device 8 and clogging a gap in a casing such as a cover frame.

The pusher 7 does not push the entire length of the bottom plate 6 but leaves about half the length of the stroke at the end. Further, the pusher 7 connects the tip 2A of the supply hopper 1 to the side wall inclination angle as described above. theta ₁ by a tilted toward the biaxial crusher 15 as 55-60 degrees, incinerated a is what easily enter the dropping path 13 without chalk, when further pressed in the pusher 7, incinerated When the amount pushed by using the cushion of A falls to the twin-screw crusher 15 side at a time, or when the pusher 7 stops, the incineration material A in the supply hopper 1 falls to the twin-screw crusher 15 side by its own weight. Can be prevented,
We can always supply a fixed amount.

The incinerated material A pushed out by the pusher 7 as described above falls down the falling path 13 and
Reach between 17 and 18. At this time, the unsuitable material discharge damper 35 is inclined 50 to 60 degrees toward the center of the sub-cutter 18 as shown by the solid line, thereby closing the discharge space S and incinerating material falling down the fall path 13. Guide A so that it is well cut between the cutters 17 and 18.

Here, both cutters 17 and 18 are rotating forward as indicated by solid arrows, so that the incinerated material A is subjected to the action of crushing and crushing by both cutters 17 and 18 and is included in this incinerated material A. The crushed material is supplied (dropped) to the discharge hopper 30 while reducing the size of the crushed material to an optimal size. At this time, the crushing crushing is performed with good crushing property by averaging the loads of both cutters 17 and 18 since the incinerated material A is always supplied in a constant amount as described above. Then, the incinerated material A is supplied to the incinerator through the chute 32 by the opening movement of the seal damper 31. At that time, since the incineration material A is reduced to the optimum size, the incinerator A can be supplied to the incinerator in a uniform amount without clogging the chute 32 or the like, and stable combustion can be achieved.

During the crushing and crushing operation, when the object to be crushed gets stuck between the cutters 17 and 18 and does not move, the cutters 17 and 18 are rotated forward and backward two or three times (a plurality of times). Repeat) As a result, when the object to be crushed can be crushed, the intended forward rotation is continued. When the unsuitable material cannot be crushed, the unsuitable material discharge damper 35 is swung as indicated by the imaginary line based on the detection of the torque of the cutters 17 and 18, and the discharge space S is opened.
The cutters 17, 18 are reversely rotated several times as shown by the dotted arrows. Then, since the sub-cutter 18 has a small diameter and a high speed, the unsuitable object is moved to the discharge space S side over the sub-cutter 18 and falls down the unsuitable object discharge path 33 to be discharged. As a result, unsuitable substances can be discharged out of the system, for example, bridging on the chute 32 side can be prevented, and furthermore, the twin-screw crusher 15 can be protected.

In the above embodiment, the pushing surface 7a of the pusher 7 may be a flat surface. For example, when the center of the pusher 7 is a convex inclined surface in plan view, the extruded incineration material A spreads in the width direction to make it possible to supply a fixed amount. It can be suitably performed. When an inappropriate object comes, the sub-cutter 18 may be slid together with the drive shaft 20 to take out the inappropriate object out of the system.

[0025]

According to the onset light of the above configuration according to the present invention, incinerated and clamping disrupted by a pair of cutters, it is possible to improve the friability since be small chunking the optimum size. Accordingly, the incinerated material can be supplied to the incinerator without clogging and in a uniform amount, whereby the combustion can be stabilized and the control can be easily performed, and the generation of CO, CH, DXN can be suppressed.

During the crushing and crushing operation, when an unsuitable object that cannot be crushed is stuck between the cutters and cannot move, the unsuitable object is removed by rotating both cutters in reverse based on the detection of the torque of the cutters. It is possible to quickly get out of the system after getting over the small diameter sub-cutter, thereby preventing the occurrence of bridges on the side of the discharge path to the incinerator and protecting both cutters and the furnace body.

[0027] Also, the incinerated bottom layer positioned below the outlet of the supply hopper, while utilizing the cushion incinerated itself by the operation of the pusher device can quantitatively supply to fall path, pressed by the pusher device min Can be prevented from dropping into the twin-screw crusher side at once, or the incineration material in the supply hopper falling into the twin-screw crusher side by its own weight when the pusher stops. And by the constant feed, crushing crushing by both cutters can be performed with good crushing property by averaging the load of both cutters, so incineration can be supplied to the incinerator with uniform size and quantity, and stable combustion Can be achieved.

Further, a duster using a pusher device, 2
By integrally combining the shaft crusher and the unsuitable material discharging device, it is possible to prevent dust from dropping out of the connection portion and the like, improve the sealing performance, and provide a clean, non-polluting and odor-free product. Further, a material seal can be achieved by a rational combination of the supply hopper and the pusher device, so that unnecessary air leakage into the furnace can be prevented.
Furthermore, the system can be made compact, the installation space can be reduced, and the arrangement of the equipment is facilitated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a crushing and dusting equipment, showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Supply hopper 2 Outlet 2A Tip 5 Pusher device 6 Bottom plate 7 Pusher 13 Falling path 15 2-axis crusher 17 Main cutter 18 Subcutter 23,24 Crushing blade 30 Discharge hopper 33 Unsuitable material discharge path 35 Unsuitable material discharge damper A Incineration Objects (including objects to be crushed) D Main cutter diameter d Sub cutter diameter

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shigeru Matsumori 5-3-28 Nishikujo, Konohana-ku, Osaka-shi, Japan Inside Hitachi Zosen Corporation (56) References Japanese Utility Model 1983-151449 (JP, U) Kaisho 56-159140 (JP, U)

Claims (1)

(57) [Claims] A feed hopper for incinerated material;
A pusher device facing the outlet of the par from the side,
Formed outside the extruded end by the pusher device of
Incineration material fall path and two axes arranged below this fall path
A crusher and an incinerator disposed below the twin-screw crusher are discharged.
The hopper has a large diameter main hopper.
Cutter and small-diameter sub-cutter are juxtaposed for free and forward rotation
However, these cutters incinerate from the falling path during normal rotation.
The material is crushed and crushed and then discharged downward.
Adjacent to the output hopper and facing the lower outside of the sub cutter
To form an unsuitable material discharging path outside the sub-cutter
It is noteworthy that an unsuitable material discharge damper was
Crushing and dusting equipment.