JP2006068574A - Dehydration cake crushing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To crush a dehydration cake such as a paper-making sludge or the like by primarily roughly loosening the dehydration cake during moving and then secondarily finely loosening it. <P>SOLUTION: A primary loosening mechanism 7 provided with a large number of loosening blades 11 is provided on an upstream side in a crusher body having a throwing port and a discharge port, and a secondary loosening mechanism 8 is provided with a large number of loosening impellers 13 on a downstream side of it. A large number of loosening blades 11 are formed on an edge of a screw impeller 10 to a tongue-like shape. In the secondary loosening mechanism 8, a large number of loosening impellers 13 are arranged on a peripheral surface of a taper cylinder 12 gradually becoming a large diameter to a downstream side. Directions of the loosening impellers are aligned in a helical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dewatered cake crusher used for a dewatered cake such as paper sludge.

  When sludge having a long fiber content such as simple sediment sludge, such as paper sludge, is dehydrated with a screw press, a dehydrated cake dehydrated to a concentration of 50% or more is obtained. And the shape of the discharged cake becomes a larger lump as it is discharged from a large model that can be processed in large quantities, but it is difficult to finely pulverize it because of the longer fiber content.

  The final disposal of such simple sediment sludge is almost always incinerated, and if the mass of dehydrated cake is large, the combustion efficiency is poor, and the amount of heat that the original pulp has is not burned sufficiently. It becomes a factor to lower the temperature. Therefore, in order not to cause a temperature drop, extra fuel such as heavy oil must be used, which increases costs.

  As a screw-type pulverizer, for example, Patent Documents 1 to 3 are disclosed, and Patent Document 1 shows a pulverizer for building material waste, and this pulverizer is an upper part of a horizontal pulverizer main body with a screw installed therein. And a discharge port at the front end, and the material charged in the input port is sheared between the edge of the screw blade of the rotating screw and the lower end opening edge of the input port, and then the screw It is configured to send out from the discharge port to the outside by rotating.

  Patent Document 2 shows a pressure pulverizer, and the basic structure thereof is that a discharge plate having a large number of discharge holes is fixed to the tip of a horizontal-type pressure-feed cylinder with a pressure-feed screw, and the inner surface of the discharge plate. A cutter that rotates integrally with the pressure feed screw is provided on the side, and the plant waste material put into the pressure feed cylinder is pumped by the pressure feed screw so that it is dispersed and extruded from each discharge hole, and at the same time it is sheared and pulverized by the cutter. It is configured.

  Patent Document 3 shows a two-screw screw shaft type pulverizer, and this pulverizer is configured in a double structure by integrating two pulverizers that rotate in reverse to each other in an overlapping state. Has been.

JP-A-11-90259 JP 2001-198487 A JP 2003-159545 A

  However, the above-described pulverizers of Patent Documents 1 to 3 are not suitable for pulverizing dehydrated cake such as paper sludge. In other words, in the case of papermaking sludge, the intertwined thin fibers enter the slight gap between the fixed member and the rotating member, and the pumping promotes this, so that the screw can become non-rotatable. High nature.

  The object of the present invention is to solve the above-mentioned problems, and to realize the pulverization of the dehydrated cake by breaking the lump of the dehydrated cake during the movement, thereby reducing the power and reducing the operating cost. Is to provide.

  The technical feature of the dewatering cake crusher according to the present invention for achieving the above object is that the dewatering cake crusher according to the present invention is loosened roughly on the inlet side in the main body provided with an inlet at the upstream end and an outlet at the downstream end. A dewatering cake crusher provided with a primary unraveling mechanism and a secondary unraveling mechanism for finely unraveling on the discharge port side, wherein a rotating shaft is arranged in the main body, and the primary unraveling mechanism is sent around the rotating shaft. The screw blades of the mechanism are spirally wound, a number of loosening blades are provided at the edges of the screw blades, and the secondary unwinding mechanism is a large number of long piece-shaped loosening blades that also serve as a feeding mechanism around the rotating shaft It is in having established.

  According to the dewatering cake pulverizer according to the present invention, the dewatered cake is subjected to a fine secondary unraveling followed by a fine secondary unraveling, and the dewatered cake is accurately pulverized to significantly increase the surface area. Combustion efficiency can be increased, and fuel consumption for maintaining the furnace temperature can be reduced.

The present invention will be described in detail with reference to illustrated embodiments.
The drawings show an embodiment of a pulverizer for papermaking pulp waste. FIG. 1 is a side view and FIG. 2 is a plan view. A horizontal drum-shaped pulverizer body 2 is arranged on a machine base 1 and is fixed by stands 3 at both ends. An inlet 5 is provided on the upper surface of the upstream end of the cylindrical body 4 of the pulverizer body 2, and an outlet 6 is provided on the lower surface of the downstream end, and the dehydrated cake dehydrated by a screw press or the like is introduced into the inlet 5. An internal path is formed in which the loosening process is performed in the process of being conveyed to the discharge port 6.

  FIG. 3 is a side view of the primary unraveling mechanism and the secondary unraveling mechanism, and a primary unraveling mechanism 7 is configured at a portion of the inlet 5 in the pulverizer body 2, and an intermediate between the inlet 5 and the outlet 6. A secondary unraveling mechanism 8 is provided at the site, and these are connected by the same rotating shaft 9.

  In the primary unraveling mechanism 7, screw blades 10 are spirally wound around the rotating shaft 9 at an equal pitch, and the peripheral edge thereof is provided close to the inner surface of the cylindrical body 4. The peripheral edge is shown in FIG. As shown, a number of loosening blades 11 are provided by cutting the screw blades 10 radially.

  The unraveling blade 11 is cut and bent in the shape of an inclined tongue piece on the upstream side and the downstream side, and as shown in FIG. 5 (a), the unraveling blade 11a is inclined on the downstream side, and inclined on the upstream side shown in FIG. 5 (b). The loosening blades 11b are alternately formed, and upright loosening blades 11c as shown in FIG. 5C are formed at intermediate portions between the inclined loosening blades 11a and 10b.

  In the secondary loosening mechanism 8, the rotary shaft 9 is formed in the tapered cylinder 12 so as to gradually increase in diameter toward the downstream side, and a number of long pieces of loosening blades 13 are disposed on the peripheral surface thereof. These loosening blades 13 project perpendicularly to the center line of the tapered cylinder 12, and the angle of the loosening blades 13 is often inclined with respect to the circumferential direction. The leading ends of the loosening blades 13 are arranged close to the inner surface of the cylindrical body 4. Therefore, the length of the loosening blade 13 is made longer toward the upstream side along the tapered cylinder 12. 3, illustration of the loosening blade 13 on the tapered cylinder 12 is omitted.

  As shown in the development view of FIG. 6, the arrangement density of the loosening blades 13 is generally increased toward the downstream side of the rotation shaft 9, and the final stage of the loosening blades 13 is made steeper. This point is a design matter, and may be set appropriately as required.

  As described above, the primary unraveling mechanism 7 and the secondary unraveling mechanism 8 are arranged on the integral rotating shaft 9, and both ends of the rotating shaft 9 are pivotally supported by the bearings 14 provided on the machine base 1. It is driven by a driving motor 15 fixed at an appropriate position on the table 1.

  That is, one end of the rotating shaft 9 protrudes to the outside and a pulley 16 is attached, and a belt 19 is stretched between the pulley 18 attached to the rotating shaft 17 of the driving motor 15 and mechanically linked. Yes. The mechanical connection means is not limited to such belt connection, but may be chain connection, gear connection, or the like. A drive source other than the drive motor 15 may be used. Reference numeral 20 denotes a maintenance / inspection window hole cover provided in the pulverizer body 2.

  In use, the rotating shaft 9 is rotated by the driving motor 15 to rotate the primary unraveling mechanism 7 having a large number of unraveling blades 11 and the secondary unraveling mechanism 8 having a large number of unraveling blades 13.

  In this state, when a lump of dehydrated cake is charged into the charging port 5 of the pulverizer body 2, the dehydrated cake is loosened primarily by the loosening blade 11 in the primary loosening mechanism 7. In this primary loosening, the dewatered cake that has been thrown in is primarily loosened by the numerous loosening blades 11 a to 11 c that are alternately formed on the edge of the screw blade 10, and falls between the screw blades 10. The dewatered cake crushed material and the crushed material adhering to the inner periphery of the cylindrical body 4 are scraped off by the unwinding blades 11a to 11c and conveyed so as to be pushed out to the secondary unwinding mechanism 8 by the rotation of the screw blade 10. Is done.

  In this way, the coarsely pulverized crushed material is then finely secondarily untwisted using centrifugal force by a number of unwinding blades 13 rotating in the secondary unwinding mechanism 8 and conveyed to the discharge port 6 side. It is discharged from the discharge port 6 to the outside.

  In this secondary loosening mechanism 8, since the path of the pulverized material in the cylindrical body 4 becomes narrower as it advances downstream by the tapered rotating shaft 9, the flow rate of the pulverized material is increased accordingly, and a large number of loosening blades 13 are used. The secondary loosening is promoted, and the crushed material coarsely and primarily loosened by the primary loosening mechanism 7 is crushed more finely and efficiently.

  Also in this case, the crushed material adhering to the inner periphery of the cylindrical body 4 is scraped off by the unwinding blade 13 and does not hinder the operation of the secondary unwinding mechanism 8.

  Further, in the screw press, steam may be blown to increase the dewatering efficiency, and in this case, there is an advantage that the water content is reduced during the pulverization by the dewatering cake pulverizer and the water content is reduced.

  In addition, the same grinding | pulverization effect is acquired by making it further increase the density of the loosening blade | wing 13 progressing downstream, without providing the taper cylinder 12. FIG.

  Moreover, this dewatering cake crusher can be applied not only to the papermaking pulp waste of the examples but also to the dewatering cake obtained from various wastes.

It is a side view of an Example. It is a top view. It is a side view of a primary and a secondary unraveling mechanism. It is a front view of a screw blade. It is sectional drawing of a loosening blade. It is an arrangement development view of a loosening blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine stand 2 Crusher main body 5 Input port 6 Discharge port 7 Primary unraveling mechanism 8 Secondary unraveling mechanism 9 Rotating shaft 10 Screw blade 11 Unraveling blade 12 Taper cylinder 13 Unraveling blade 15 Motor for driving

Claims (3)

A dewatering system provided with a primary unwinding mechanism for loosening loosely and a secondary unraveling mechanism for loosening loosely on the discharge port side on the loading port side in the main body provided with a loading port on the upstream end and a discharge port on the downstream end A cake crusher, in which a rotating shaft is disposed in the main body, the primary unwinding mechanism spirally winds a screw blade of a feed mechanism around the rotating shaft, and a number of unwinding screws are arranged around the edge of the screw blade. A dehydrating cake crusher characterized in that a blade is provided, and the secondary loosening mechanism is provided with a number of long pieces of loosening blades also serving as a feeding mechanism around the rotating shaft. The dewatering cake crusher according to claim 1, wherein the plurality of loosening blades are formed by tilting toward the upstream side or the downstream side and cutting down into a tongue shape. The secondary unraveling mechanism projects the numerous unraveling blades in a direction perpendicular to the rotation shaft on the circumferential surface of the rotating shaft that gradually increases in diameter toward the downstream side. The dewatered cake crusher according to claim 1 or 2, wherein the direction is aligned in a spiral direction with respect to the rotation axis.

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