JP3880099B2 - Dry sludge molding machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dewatered sludge treatment apparatus for small-scale facilities such as small-scale sewage treatment plants and agricultural settlement drainage facilities, and specifically, molding of dehydrated cake used as a pretreatment for drying dehydrated cake. Relates to the device. In the present invention, to-be-dried sludge refers to a dehydrated cake.
[0002]
[Prior art]
As a pretreatment of a drying apparatus for sludge treatment, a roll groove molding machine as shown in FIGS. 6 and 7 has been used. 6 is a side view of the hopper and the forming apparatus, and FIG. 7 is a front view of the forming roll.
In this type of molding machine, when a sticky dewatered cake is processed, the dewatered cake that has entered the forming rolls 62 and 63 from the hopper 61 is formed by the forming roll grooves 66 and 67, and the formed dewatered cake is transferred to the roll groove 66. , 67 does not leave and is removed by the scrapers 70 to 74, but complete removal is difficult. In particular, sewage sludge has a large amount of organic matter and easily adheres to the roll grooves 66 and 67, so that removal thereof is not easy. In addition, the scrapers 70 to 74 were often damaged by the biting of metals, stones, etc. contained in the dehydrated cake. For this reason, there has been a problem in that the molding apparatus cannot be operated smoothly.
[0003]
[Problems to be solved by the invention]
In order to solve the above-described adverse effects, a molding machine using a completely different method has been expected instead of forming a dehydrated cake with a forming roll.
The present invention does not use a forming roll to form a dehydrated cake, so there is no problem of adhesion of the dehydrated cake to the roll groove or damage to the scraper, and it is easy to adjust the amount of dehydrated cake and cake thickness and to cut the cake width. The purpose is to provide a to-be-dried sludge molding machine capable of forming a smooth dehydrated cake.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a dried sludge molding machine according to the present invention is a dehydrated cake molding machine used as a pretreatment of a dehydrated cake drying apparatus, and includes a trough and a vibrator. That is, a trough that receives the sludge and forms a flat plate, and a vibration device that sequentially applies a vibration component to the trough to move the sludge sequentially on the trough. A partition member is provided so that the sludge comes out in a band shape from one end of the trough through between the partition member and the partition member.
[0005]
Specifically, the shape of the trough is such that the bottom surface of the trough forms an upward slope with respect to the horizontal plane along the moving direction of the dehydrated cake. The width of the bottom of the trough is increased according to the moving direction of the dehydrated cake. By increasing the upward inclination of the bottom surface of the trough and the width of the trough bottom surface in accordance with the moving direction of the dehydrated cake, the thickness of the dehydrated cake near the exit of the dehydrated cake of the trough is reduced. Furthermore, a partition groove for forming the dehydrated cake is provided at the trough outlet portion of the dehydrated cake, and the width of the dehydrated cake is formed to the width of the partition groove.
[0006]
On the other hand, the vibration of the trough vibrates along a plane having an inclination angle larger by an angle ψ than the upward inclination angle θ of the bottom surface of the trough by the vibrator. The dehydrated cake is moved stepwise toward the trough exit by the vibration and gravity of the dehydrated cake. The trajectory of the dehydrated cake due to trough vibration is as shown by the thick line in FIG. Due to the movement trajectory of the so-called corrugated dehydrated cake, the dehydrated cake is formed into a square bar shape from the trough exit portion, moved, cut in the dropping process by the gravity of the dehydrated cake, and transferred to the dryer.
[0007]
Furthermore, a rotary cutter for forming a dehydrated cake can be provided above the partition groove for forming the dehydrated cake provided at the dehydrated cake exit portion of the trough. This rotary cutter is provided as an auxiliary in the case of high moisture content sludge with a thick cake.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. 1 to 5 are assigned the same reference numerals. FIG. 1 is a schematic longitudinal sectional view of a drying sludge molding machine according to the present invention. FIG. 2 is a schematic plan view of a drying sludge molding machine according to the present invention. In addition, the partition groove | channel which shape | molds the dewatering cake provided in the trough exit part of the dewatering cake of FIG. 2 is shown to CC arrow part, The figure of this part shows the case where a rotary cutter is not attached.
[0009]
The drying sludge molding machine according to the present invention includes a trough 1 and a vibrator 2. Moreover, the rotary cutter 5 is attached according to the property of the dewatering cake 3.
As shown in FIG. 1, the bottom surface 1 a of the trough 1 forms an upward inclination with an inclination angle θ with respect to the horizontal plane along the moving direction of the dehydrated cake. The width of the bottom of the trough increases as the dehydrated cake goes from the entrance to the exit. By increasing the slope of the trough bottom and the width of the trough bottom as the dehydrated cake goes from the inlet to the outlet, the thickness of the dehydrated cake near the trough dehydrated cake outlet is reduced.
[0010]
A partition groove composed of a partition portion 4 for forming the dewatered cake is provided at the exit portion of the dewatered cake of the trough where the thickness of the dewatered cake is reduced. Detailed views of this partition groove are shown in FIGS. FIG. 4 is a detailed view of part A in FIG. FIG. 5 is a front view of FIG. The height of the partition plate of the partition groove is h. The width of the partition groove is b. The width of the dewatered cake is formed into the partition groove width b and the height is t.
[0011]
4 and 5 show a state in which the rotary cutter 5 is attached. The rotary cutter 5 includes a rotary shaft 5a, a sleeve 5b, and a rotary cutter plate 5C. The rotary cutter 5 rotates using the electric motor 6 shown in FIG. 1 as a driving machine. The mounting interval of the rotary cutter plate 5c is the same as the partition groove width b.
[0012]
The vibrator 2 is attached to the lower surface of the trough bottom surface 1a as shown in FIG. The types include an electromagnetic feeder using electromagnetic vibration, a linear feeder, and a rubber spring feeder using vibration due to rotation of an unbalanced weight.
The electromagnetic feeder includes an electromagnet as a vibration source and a leaf spring. The vibration direction of the trough is the direction of the arrow EE, which is the direction of the inclined angle plane of θ + ψ with respect to the horizontal plane. As shown in FIG. 3, the inclination angle ψ is appropriately 25 ° to 30 °.
[0013]
Next, a method for forming a dehydrated cake using the dried sludge molding machine according to the present invention described above will be described.
A dehydrated cake 3 is supplied to the trough 1 from the dehydrated cake supply pipe 7 of FIG. When a certain amount of dehydrated cake is supplied to the trough 1, the vibrator 2 is activated. When the electromagnet is excited by the pulsating current from the controller, the trough 1 is suddenly attracted downward. The point G in FIG. 3 moves to the point F. Since the descending speed of the trough 1 is fast, the dewatered cake floats in the air and becomes the position M in FIG. 3 and falls forward on the trough 1 by gravity and becomes the position N. Next, the trough 1 is pushed back by the force of the leaf spring 2a and moves from the F point to the H point. At this time, the dehydrated cake on the trough 1 moves forward. The movement trajectory of the dehydrated cake is indicated by a thick line in FIG. In this case, the vibration amplitude of the trough 1 is the width of the KK arrow. This action is repeated at a high speed of 3000 to 3600 times per minute. The dehydrated cake on the trough 1 moves smoothly and enters the partition groove portion at the exit of the trough 1. The dehydrated cake is formed into a square bar shape at the partition groove. The cross section of the square bar has a height t and a width b. The dehydrated cake formed into a square bar shape is supplied from the tip of the trough 1 to the drying conveyor 8 in the dropping process of the dehydrated cake.
[0014]
In the case of high moisture content sludge with a thick dehydrated cake, a rotary cutter 5 for forming the dehydrated cake is provided above the partition groove 4 for forming the dehydrated cake provided at the exit of the dehydrated cake of the trough 1 to secure the partition groove width b. Then, it is supplied to the drying conveyor 8 as a thick square bar-shaped dehydrated cake.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0016]
(1) Since there is no equipment such as a scraper that removes the adhesion of the dehydrated cake, there is no obstacle due to the work stoppage due to their breakage.
(2) Even if there is a lot of organic matter such as sewage sludge and it tends to adhere to the partition groove, it does not adhere to the partition groove due to vibration and gravity movement of the dewatered cake, and there is no broken instrument.
(3) Since the drying area of the dewatered cake can be formed large, the drying speed of the dewatered cake such as a heat pump type ventilator can be increased.
(4) Automatic control of the supply amount can be easily performed by detecting fluctuations in combination with a load of a measuring instrument, a flow meter, a thermometer, and an electric motor.
(5) Since the resonance phenomenon is used, it consumes less power and is economical.
(6) Since the structure is simple, there is no need for maintenance and inspection.
(7) Since vibration is used, there is little wear between the trough surface and the dewatered cake, and even when used for a long time, there is little wear on the trough.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view of a drying sludge molding machine.
FIG. 2 is a schematic plan view of a drying sludge molding machine.
FIG. 3 is a movement locus diagram of a dehydrated cake due to trough vibration.
4 is a detailed cross-sectional view of a portion A in FIG. 1. FIG.
FIG. 5 is a detailed front view of a portion A in FIG. 1;
FIG. 6 is a partial cross-sectional side view of the hopper and roll groove mold forming apparatus.
FIG. 7 is a front view of a groove forming roll.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Trough 2 Vibrator 3 Dehydrated cake 4 Dehydrated cake partition plate 5 Rotating cutter 6 Electric motor 7 Dehydrated cake supply piping 8 Drying conveyor 61 Hopper 62, 63 Groove type forming roll

Claims (3)

In a to-be-dried sludge molding machine that molds dehydrated organic-containing sludge, the inlet portion to which the sludge is supplied, and an outlet portion that is formed wider than the inlet portion and has a plurality of partition members at the ends, A to-be-dried sludge molding machine comprising a trough for making sludge into a flat plate shape, and a vibration device for vibrating the trough and moving the sludge from an inlet portion to an outlet portion of the trough. The to-be-dried sludge molding machine according to claim 1, wherein the trough is inclined upward from the inlet portion toward the outlet portion. The drying sludge molding machine according to claim 1 or 2, wherein a rotary cutter is provided at the trough outlet.

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