JPS6313795Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sludge treatment device that crushes and pulverizes a large amount of sludge, and effectively deodorizes and granulates the large amount of sludge.

Recently, as a technology for treating excess sludge in, for example, human waste treatment plants, a method has been proposed in which powdered material such as zeolite is added to sludge and pulverized to form granules. According to this method, the sludge can be deodorized through simple treatment and the sludge can be easily handled.

Therefore, the present applicant previously filed an application for a device suitable for the above technology. (Utility Application No. 56-5996) This invention is an improvement of the above-mentioned application, and provides a sludge treatment device that can efficiently crush and granulate a large amount of sludge, and can deodorize and granulate a large amount of sludge at once. The purpose is to

An embodiment of this invention will be described below with reference to the drawings.

Inside the casing 1, there is a rotating shaft 3 (upper rotating shaft) that crushes and granulates sludge using a plurality of crushing rods 2.
and rotating shafts 4 and 5 (lower rotating shafts) are housed. At least two of these rotating shafts 4 and 5 are arranged so that the loci of the crushing rods 2 intersect with each other.

As shown in FIGS. 1 and 2, the casing 1 housing the rotating shafts 3 to 5 has a shape in which three cylindrical bodies with a part cut out in the axial direction are connected and communicated with each other. are arranged horizontally, one at the top and two at the bottom. Further, as shown in FIGS. 1 and 2, this casing 1 has a rectangular inlet 6 that communicates with the upper cylindrical body and extends upward at the upper end of the casing, and a lower part of the casing 1 at the lower end of the casing 1. A discharge port 7 is formed by cutting out the bottom of the cylindrical body. Inside each cylindrical body of the casing 1, the rotating shafts 3 to 5 are horizontally arranged at respective center positions, and each of the rotating shafts 3 to 5 is pivotally supported by both end walls of the casing 1.

In this embodiment, the upper rotating shaft 3 of each of the rotating shafts 3 to 5 is connected to a drive unit (not shown) via a pulley or the like.
It is connected to and rotates. Gears 8 to 1 are meshed with each rotating shaft 3 to 5 in sequence as shown in FIG.
1, the rotation of the upper rotating shaft 3 is sequentially transmitted to the two lower rotating shafts 4 and 5 via the upper gear 8, the floating gear 9, and the lower gears 10 and 11 as rotations in mutually opposite directions. It is designed to be The gear ratio of each of the gears 8 to 11 is 1, and the rotating shafts 3 to 5 are formed to rotate at the same time.

Further, as shown in FIGS. 4 and 5, a plurality of crushing rods 2 are spirally attached to the rotating shafts 3 to 5, passing through a hollow pipe-shaped shaft portion and having the other end fixed by tightening bolts 12. and one upper crusher 13;
Two lower crushers 14 and 15 are constructed. The rod crushers 13 to 15 function as cut screws and carry the sludge toward the discharge port 7.

Here, one pitch of the crushing rod 2 is approximately 4/5 times the outer diameter D of the cylindrical body of the casing 1, and this crushing rod 2
are formed on each rotating shaft 3 to 5 at a pitch of 4.5. As shown in FIG. 5, eight crushing rods 2 are attached to each pitch at an angle of 45 degrees. Further, a plate-shaped sludge adhesion prevention plate 16 is provided at the tip of the crushing rod 2 to prevent sludge from adhering to the periphery of the cylindrical body. Furthermore, a sludge cutting plate 17 oriented in the circumferential direction is attached to the tip of the crushing rod 2 of the rotating shaft 3. still,
As described above, the two lower rotating shafts 4 and 5 are arranged so that the trajectories of the respective crushing rods 2 intersect.

In Fig. 5, part A shows the interlocking state of the three upper left and right stirring shafts, part B shows only the left-hand rotation right-hand screw stirring shaft on the left, and part C shows only the right-hand right-hand rotation left-hand screw stirring shaft. , part D shows the upper left-handed rotation right-handed screw stirring shaft, and part E shows the termination part of the left and right upper three shafts.

Next, the operation of this invention will be explained.

Sludge with a moisture content of approximately 85%, which has been dehydrated by the dehydrator, is fed into the casing 1 from the inlet 6 together with the zeolite powder.
When the sludge is introduced into the interior, it is first crushed by the sludge cutting plate 17 and crushing rod 2 of the upper crusher 13,
A part of it falls to the lower crushing rods 14 and 15 below, and a part of it is conveyed toward the discharge port 7 as shown by arrow A. In addition, lower crushers 14 and 15 located below
As shown in Fig. 4, the sludge rotates in the directions of the arrows B and C, which are opposite to each other, and the sludge is thrown upward from the center of both, so that after the falling sludge is crushed, some of it is sent to the upper crusher 13. The sludge in the upper crusher 13 enters the sludge, and conversely, the sludge in the upper crusher 13 falls down one by one due to gravity, which is repeated, as the sludge and zeolite powder mix and become granulated, and are discharged from the discharge port 7. At this time, since a sludge cutting plate 17 is attached to the upper crushing rod 2, the sludge immediately after being input, the lower crusher 14,
Relatively large diameter sludge thrown up from the central part of 15 is effectively cut. Further, the sludge adhesion prevention plate 16 of the crushing rod 2 can prevent sludge from adhering and remaining on the inner wall of the casing 1, and the sludge cutting plate 17 is effective in temporarily crushing the charged sludge.
In this way, in this invention, a plurality of crushers 13 to 15 are provided, and they are effectively arranged in the upper and lower portions to efficiently crush the sludge, so that the sludge crushing effect is dramatically improved. Furthermore, since zeolite powder is mixed into the input sludge, the sludge once crushed is less likely to coalesce and can be effectively granulated. The most suitable powder material is powdered zeolite, but other materials such as incinerated ash, sawdust, wood chips, coal powder, etc. may also be used, and incinerated ash that is still hot may be recycled.

As described above, this invention has extremely excellent effects such as being able to crush and granulate a large amount of sludge, effectively deodorizing and granulating a large amount of sludge at once.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the external appearance of one embodiment of this invention, Fig. 2 is a side view taken in the direction of the arrow in Fig. 1, Fig. 3 is a side view showing the structure of the same gear section, and Fig. 4 is the first embodiment of the invention. The internal view is shown in the side view shown by the arrow in the figure, and FIG. 5 is a front view of the same interior. 1...Casing, 2...Crushing rod, 3-5...
Rotating shaft, 6...input port, 7...discharge port.

Claims (1)

[Scope of utility model registration request] A casing with an input port at the top of one end and a discharge port at the bottom of the other end, an upper rotating shaft that is housed in the upper part of the casing and has a plurality of crushing rods attached in a spiral, and this upper rotating shaft. a sludge cutting plate attached to a crushing rod; and two lower rotating shafts housed in the lower part of the casing and having a plurality of crushing rods attached in a spiral manner, the two lower rotating shafts are , the crushing rods are arranged such that their trajectories intersect with each other, are rotated in opposite directions, and are configured such that the crushing rods move upward at a place where the trajectories of the crushing rods intersect. A sludge treatment device featuring: