JP2000325999A - Slurry treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a slurry treatment apparatus capable of reducing the weight of treated matter of a slurry and capable of certainly eliminating the clogging of a drum screen. SOLUTION: A slurry treatment apparatus has a drum screen 2 having small holes 2a formed to its side surface and having a recovery port 11 provided to its bottom portion and centrifugally dehydrating a charged slurry to form an adhered layer 4 being the extracted matter of the slurry to the side surface, a drive part 3 for rotationally driving the drum screen 2 and a heating means 5a for evaporating moisture contained in the extracted matter to incinerate the extracted matter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry processing apparatus for separating solids from a slurry and treating the separated solids.

[0002]

2. Description of the Related Art As a slurry processing apparatus for extracting a solid substance from a slurry, one described in Japanese Patent Application Laid-Open No. 6-281325 is known. The slurry processing apparatus disclosed in this publication includes an enclosure that covers the periphery, a drum screen housed in the enclosure, a scraping device that scrapes dry solid matter, and a mixing tool that agitates the scraped dry material. And a heating means for heating the bottom of the drum screen.

According to such a slurry processing apparatus, when the slurry containing the granular powder to be dried is charged into the drum screen, the rotation of the drum screen is started, and the slurry is centrifuged on the inner wall surface of the drum screen. It flows almost cylindrically by force, and a ring-shaped adhesion layer is formed. Then, the liquid contained in the slurry flows out of the drum screen from the screen.

When the rotation speed of the drum screen is increased to a maximum and the outflow of liquid by centrifugation has been reduced to a negligible level, the rotation speed is reduced to operate the scraping device. That is, the scraping device is inserted into the semi-dry solid, the solid is scraped from the inner wall of the drum screen and dropped on the bottom plate of the drum screen. Thus, the first drying stage is completed.

[0005] Subsequently, a second drying stage is performed by alternately rotating the drum screen forward and reverse, and continuously or intermittently rotating the scraping device and the mixing tool to sweep the bottom plate of the drum screen. Will be

[0006] The operations of the drum screen reversing and scraping device and the mixing tool are all coordinated so that the solid material layer in the drum screen is sufficiently stirred.

Here, since heating means is provided at the bottom of the drum screen, when the above-described operations for stirring are performed, all solids roll and come into contact with the heating means. The remaining liquid is quickly evaporated.

[0008] The solid matter sufficiently dried in this way is carried out of the drum screen by pneumatic transportation by suction or mechanical transportation by a conveyor.

However, in the conventional slurry processing apparatus as described above, after centrifugal dewatering, it is necessary to scrape off the inner wall of the drum screen to the heating means in order to dry the solid, so that a mechanical scraping apparatus is required. Becomes

In addition, a stirrer such as a mechanical mixing tool is required to uniformly contact the heating means with the solids scraped off on the bottom plate of the drum screen and piled up, thereby increasing the cost.

Further, since the drum screen is rotated at a high speed for centrifugal separation, fine solids are easily clogged in the screen portion. Since it is difficult to eliminate the clogging only by the scraping device, maintenance for preventing the clogging is indispensable.

If the clogging is to be eliminated without performing such maintenance, a new clogging prevention mechanism is required, resulting in an increase in cost.

[0013] Since the dried solids are formed into non-uniform granules, they need to be taken out by means of transportation such as suction or a conveyor as described above, which increases the cost.

Therefore, the present inventors have proposed the following slurry processing apparatus prior to the present invention in order to solve such problems.

Hereinafter, a kitchen waste processing apparatus using the slurry processing apparatus will be described in detail with reference to the drawings.

FIG. 3 is an explanatory view showing the entire configuration of a conventional slurry processing apparatus.

As shown in FIG. 3, the slurry processing apparatus 1
Has a drum screen 2 in which a small hole 2a is formed on the side surface and a recovery port 11 is formed on the bottom. The drum screen 2 is formed in a cylindrical shape, and is rotationally driven by the driving unit 3 to centrifugally dehydrate the supplied slurry.

The recovery port 11 formed at the bottom of the drum screen 2 has an inner diameter larger than the outer diameter of the dried material so that the shrunk dried material can be dropped, and has an inner wall surface of the drum screen 2. It is formed to have a smaller diameter than the inner diameter.

Here, in the case shown in the drawing, an adhesion layer 4 made of a semi-dry solid after centrifugally dewatering the slurry is formed on the inner wall of the drum screen 2. The adhesion layer 4 adheres to the inner wall surface of the drum screen 2 with a substantially uniform thickness due to the centrifugal force of the drum screen 2.

The drum screen 2 has an air supply duct 13
And a discharge duct 12 are attached.

The air supply duct 13 has a heating unit 5 serving as a heat source.
And the heat generated in the heating section 5 is transferred to the drum screen 2
An air blowing means 6 such as a fan for feeding the inside is provided. Thereby, the heat of the heating unit 5 is supplied to the adhesion layer 4, and the adhesion layer 4 is dried.

Further, the discharge duct 12 discharges water vapor in the drum screen 2 when the adhesion layer 4 is dried by the moisture when the slurry is centrifugally dehydrated and the heat from the heating unit 5.
A dehydration detecting means 100 is attached to the discharge duct 12, and it is detected from the amount of water detected by the dehydration detecting means 100 that centrifugal dehydration has progressed and the adhesion layer 4 has been formed.

In such a slurry processing apparatus, an inlet 8a is provided facing the inner wall surface of the drum screen 2, and an inlet 8 for introducing the slurry into the drum screen 2 is provided. The introduction unit 8 is provided with adjusting means 10 for adjusting the amount of slurry flowing into the drum screen 2. Further, an inflow amount detecting means 101 for detecting an inflow amount of the slurry is provided.

When the slurry reaches a predetermined amount in the drum screen 2, the inflow amount detecting means 10 which detects the predetermined amount of slurry.
1 sends a signal to the control unit 9, whereby the operation of the drive unit 3 and the adjusting means 10 is controlled.

Next, a series of operations of the conventional slurry processing apparatus having such a configuration will be described.

First, the drive unit 3 starts driving by the control unit 9, and thereby the drum screen 2 starts rotating.
When the slurry is guided into the drum screen 2 through the introduction section 8, the slurry is subjected to centrifugal force by the rotating drum screen 2, so that the slurry does not fall directly downward (vertically) from the collection port 11, Drum screen 2
Flows on the inner wall of the substrate to form a cylindrical adhered layer 4.

Here, the inflow amount of the slurry is detected by the inflow amount detecting means 101, and the detection signal is sent to the control unit 9. Then, in response to the detection signal, the control unit 9 controls the adjusting means 10 to control the slurry drum screen 2.
It controls the amount of inflow to the system. This is because if the amount of the slurry that has flowed in is not less than a predetermined amount, the adhesion layer 4 having an appropriate thickness is not formed in the drum screen 2.

Under the influence of the centrifugal force, the liquid contained in the slurry reaches the discharge duct 12 from the small holes 2a formed on the side surface of the drum screen 2 in large numbers.
And is discharged out of the slurry processing apparatus 1 via the

The drum screen 2 is rotated until the liquid discharged from the many small holes 2a has a negligible flow rate.

When the dehydration detecting means 100 detects that such a state has been reached, a cylindrical adhesion layer 4 having a substantially uniform thickness and height is formed on the inner wall surface of the drum screen 2. It will be.

When the dehydration detecting means 100 detects that the dehydration has been completed, the controller 9 controls the drum screen 2
, The heating unit 5 and the blowing unit 6 are operated. Here, the heating unit 5 raises the temperature of the drum screen 2 and the adhesion layer 4 to a predetermined temperature and maintains the temperature in that state, and the blowing unit 6 transfers the heat of the heating unit 5 to the drum screen 2. This is for drying the adhesion layer 4.

When the drying by heating is started, the moisture contained in the adhesion layer 4 starts to evaporate and the adhesion layer 4 shrinks. Specifically, the diameter shrinks by about 1% to 10%, depending on the type of slurry. Since the inner wall surface of the drum screen 2 is formed of a material having a large contact angle with water, the dried and shrunk adhesive layer 4 is easily separated from the inner wall surface of the drum screen 2. Here, when the slurry is a crushed garbage, the moisture content of the adhesion layer 4 is desirably set to 10% or less in consideration of a margin.

After a lapse of a predetermined time, the adhesion layer 4 becomes a small piece of dried material and falls from the collection port 11 to form a drum screen 2.
Easily discharged from And the discharged dried product is
Once stored in an accumulation tank (not shown), it is disposed of.

[0034]

However, in such a conventional slurry processing apparatus, only the slurry is dried, so that the weight is reduced to about 1/10 of that before the processing, and the dried shrinkage is discarded. There was a problem that the frequency increased.

When the slurry has a small particle size such as sludge, the diameter of the drum screen must be reduced in order to catch the sludge. Therefore, clogging of the drum screen can be prevented only by drying the slurry. There was a problem that it could not be solved reliably.

Accordingly, it is an object of the present invention to provide a slurry processing apparatus capable of reducing the weight of a processed slurry.

Another object of the present invention is to provide a slurry processing apparatus capable of reliably eliminating clogging of a drum screen.

[0038]

In order to solve this problem, a slurry processing apparatus according to the present invention has a small hole formed on a side surface and a recovery port provided at a bottom, and centrifugally dewaters the supplied slurry. A drum screen that forms an adhesion layer that is an extract of slurry on the inside of the side surface, a drive unit that rotationally drives the drum screen, and a heating unit that evaporates water contained in the extract and incinerates the extract. It is configured.

Thus, since the slurry is dehydrated and dried and further incinerated, the weight of the processed slurry can be reduced. In addition, it is possible to reliably eliminate clogging of the drum screen.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, a small hole is formed in a side surface and a recovery port is provided in a bottom portion. A drum screen that forms an adhesion layer that is an extract of a, a driving unit that rotationally drives the drum screen,
It is a slurry processing apparatus having a heating means for evaporating water contained in the extract and incinerating the extract, and the dewatering and drying of the slurry and further incineration reduce the weight of the processed material of the slurry. Has the effect that it becomes possible. In addition, there is an effect that clogging of the drum screen can be reliably eliminated.

According to a second aspect of the present invention, in the first aspect of the present invention, the lower part of the drum screen is provided.
A slurry processing device equipped with a pulverizing unit that pulverizes incineration material that has fallen from the drum screen after falling off from the drum screen. Since the volume is reduced by the pulverization, it is possible to improve the handleability. Having.

According to a third aspect of the present invention, in the first or second aspect, the heating means is a slurry processing apparatus in which the heating means is a magnetron, and the drying process and the incineration process are continuously performed with a simple configuration. Has the effect that it is possible to perform

According to the invention of claim 4 of the present invention, a small hole is formed on the side surface and a recovery port is provided at the bottom, and the supplied slurry is centrifugally dewatered to extract the slurry extract inside the side surface. A drum screen for forming an adhesion layer;
It has a driving unit for rotating and driving the drum screen, an incineration unit installed below the drum screen, and a heating unit for incinerating the extract reaching the incineration unit from the recovery port and drying the adhesion layer of the drum screen. This is a slurry processing apparatus, which has a function of reducing the weight of a processed material of the slurry because the slurry is dehydrated and dried and further incinerated. In addition, there is an effect that clogging of the drum screen can be reliably eliminated. Furthermore, since the adhered layer in the drum screen is dried by waste heat generated during incineration, power consumption can be reduced and running cost can be greatly reduced.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a small hole is formed between the drum screen and the incineration section, the small hole is separated from the drum screen and drops from the recovery port. This is a slurry processing apparatus in which a pulverizing unit for pulverizing the extracted extract is installed, and since the volume is reduced by the pulverization, it has an effect of improving the handleability.

The invention according to claim 6 of the present invention is the invention according to claim 4 or 5, wherein the heating means is a slurry processing apparatus in which a burner is used, and a higher combustion temperature can be obtained. It has an effect that drying of the adhesion layer can be efficiently performed by heat.

According to a seventh aspect of the present invention, in the invention according to any one of the fourth to sixth aspects, waste heat at the time of incineration in the incineration section is recovered and the extract is dried. This is a slurry processing device provided with a heat transfer path to send to the drum screen, and has the effect that it is possible to reuse waste heat even if the place where the slurry is dewatered and the place where the slurry is incinerated are far apart. Have.

According to an eighth aspect of the present invention, in the seventh aspect of the present invention, the heat transfer path is a slurry processing apparatus which is a heat pipe, and a place where the slurry is dewatered and a place where the slurry is incinerated. This has the effect that it is possible to reuse waste heat even if it is far away.

According to a ninth aspect of the present invention, in accordance with any one of the fourth to eighth aspects, a heat storage means for collecting and storing waste heat generated during incineration in the incineration section is provided. Slurry processing device, which has an effect that the drying process and the incineration process can be performed at different times.

According to a tenth aspect of the present invention, in the invention according to any one of the fourth to ninth aspects, a hot water supply pipe is wound around the incineration section, and waste heat generated during incineration in the incineration section. This is a slurry processing apparatus for heating the hot water supply pipe, and has an effect that waste heat can be used as a heat source for hot water supply.

According to an eleventh aspect of the present invention, in the first aspect of the present invention, a dehydration detecting means for detecting that an adhesion layer is formed on the drum screen is provided. Since it is detected that the dehydration of the adhering layer has been completed, it is possible to carry out continuous processing of the slurry.

According to a twelfth aspect of the present invention, in the first aspect of the invention, the dehydration detecting means measures a time until the slurry becomes a dehydrated adhered layer. This is a slurry processing device that is a timer that performs continuous processing of slurry at low cost.

According to a thirteenth aspect of the present invention, in the slurry processing apparatus according to any one of the first to twelfth aspects, the dewatering and incineration of the slurry is performed using a late-night electric power. In addition, the power consumption can be further reduced, and the running cost can be greatly reduced.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In these drawings, the same members are denoted by the same reference numerals, and duplicate description is omitted.

(Embodiment 1) FIG. 1 is an explanatory view showing the overall configuration of a slurry processing apparatus according to Embodiment 1 of the present invention.

As shown in FIG. 1, the slurry processing apparatus 1 of the present embodiment has a drum screen 2 having a small hole 2a formed on a side surface and a recovery port 11 formed at a bottom. The drum screen 2 is formed in a cylindrical shape, and is rotationally driven by a driving unit 3 such as a motor to extract the solid matter by centrifugally dewatering the supplied slurry.

Examples of suitable slurry that is introduced into the slurry processing apparatus 1 and effectively performs a drying process include, for example, crushed garbage obtained by crushing with a crusher such as a disposer provided in the garbage processing apparatus. is there. However,
The slurry is not limited to the crushed garbage, but any liquid containing a solid is sufficient.

The drum screen 2 is rotatably mounted on the apparatus main body by bearings.
Is driven by the belt. However, drum screen 2
May be driven by, for example, a chain or a gear instead of a belt drive. Further, a rotor may be attached to the drum screen 2, and an external stator may be energized and driven.

The size of the small holes 2a is set appropriately according to the components of the slurry. The size of the small holes 2a may be such that the solid matter contained in the slurry hardly passes. In the case of food, if the diameter of the small hole 2a is about 1 mm, about 80
% Or more, and when the slurry is sludge generated in a wastewater purification device, the diameter of the small holes 2a is 1
It needs to be about 00 μm.

The collecting port 11 formed at the bottom of the drum screen 2 has an inner diameter larger than the outer diameter of the incinerated material so that the incinerated material of the slurry can drop, and the inner wall surface of the drum screen 2 It is formed so as to have a smaller diameter than the inner diameter of. Note that the diameter of the collection port 11 can be made variable. Here, the diameter of the recovery port 11 can be set to an appropriate size depending on the type of slurry to be processed by the slurry processing apparatus 1.

In the case shown in the drawing, an adhesion layer 4 made of semi-dry solid material after centrifugally dewatering the slurry is formed on the inner wall of the drum screen 2. The adhesion layer 4 adheres to the inner wall surface of the drum screen 2 with a substantially uniform thickness due to the centrifugal force of the drum screen 2 and has a cylindrical shape.

A heating means 5a is attached to the drum screen 2 in order to dry and incinerate the adhesion layer 4 as described above. Various means such as a heater such as a burner and a nichrome wire, a magnetron for generating a high frequency, and a device for heating the drum screen 2 using an electrically induced eddy current can be applied to the heating means 5a. However,
It is desirable to use a magnetron that can perform the drying process and the incineration process continuously with a simple configuration.

The exhaust gas duct 2 is provided on the drum screen 2.
2 and a discharge duct 12 are attached.

The exhaust gas duct 22 is provided with an exhaust gas purifying means 7 made of, for example, a catalyst or activated carbon for purifying the exhaust gas.
Further, a blowing means 6a such as a fan for discharging exhaust gas generated during drying and incineration to the outside of the apparatus is provided. In addition,
In the case of natural exhaust, the blowing means 6a may not be attached.

The discharge duct 12 discharges water when the slurry is subjected to centrifugal dehydration and exhaust gas generated during drying and incineration. A dehydration detecting means 100 is attached to the discharge duct 12, and it is detected from the amount of water detected by the dehydration detecting means 100 that centrifugal dehydration has progressed and the adhesion layer 4 has been formed. And such dehydration detecting means 1
Since the completion of the dehydration of the adhesion layer 4 is detected by 00, the slurry can be continuously processed.

The dehydration detecting means 100 measures the distance in the discharge duct 12 and the distance between the formed liquid films, such as a distance measuring sensor and an ultrasonic sensor, and detects the presence or absence of moisture, or dehydration. What is detected by a change in the current value of the drive unit 3 corresponding to the state described above can be used.

In such a slurry processing apparatus 1, the inlet 8 a is installed toward the inner wall surface of the drum screen 2,
An introduction unit 8 for introducing the slurry into the drum screen 2 is provided. The introduction section 8 has an adjusting means 10 for adjusting the amount of slurry flowing into the drum screen 2.
Is attached. Further, an inflow amount detecting means 101 for detecting an inflow amount of the slurry is provided.

Here, the adjusting means 10 may be controlled by a pump such as a tube pump or a monopump suitable for feeding a slurry containing solid matter, or may be controlled by an electromagnetic valve or a solenoid. One that stops the inflow of water can be used. Also, the inflow amount detecting means 101 detects the thickness of the slurry adhering layer with an ultrasonic sensor, detects the change in the current value of the drive unit 3 whose load varies depending on the inflow amount of the slurry, or adjusts the inflow amount. A device that detects the operation time of the pump used as 10 can be used.

When the slurry reaches a predetermined amount in the drum screen 2, the inflow amount detecting means 10 which detects this,
1 sends a signal to the control unit 9, whereby the operations of the driving unit 3, the heating unit 5a and the adjusting unit 10 are controlled.

Below the drum screen 2, there is provided a pulverizing section 18 for pulverizing the incinerated material which has been dehydrated and dried by the drum screen 2 and dropped from the recovery port 11 to reduce the particle size. Small holes 21a are formed in the side and bottom surfaces of the housing 21 that forms the crushing unit 18.

The crushing unit 18 includes a driving unit 15 such as a motor.
A cutter (pulverizing means) 14 that is driven to rotate and pulverizes the incinerated material that has fallen is attached to the bottom surface of the housing 21.

Here, the cutter 14 may be a cutter for cutting incinerated materials having a small blade thickness, or a hammer for crushing incinerated materials having a large thickness to crush the incinerated materials. The driving unit 15 is the driving unit 3 described above.
Can also be shared with. In this case, the drive unit 3 may be a two-axis motor, and the cutter 14 may be rotated on a different axis from the axis for driving the drum screen 2 via a belt or a chain. Also,
At this time, the rotation directions of the drum screen 2 and the cutter 14 may be set to be opposite to each other, and a clutch may be provided so that each can be driven to rotate independently.

The cutter 14 is provided with a drop detecting means 102 for detecting, by weight, the incinerated material that has fallen into the pulverizing section 18. However, the fall detecting means 102 is not limited to the weight detection sensor for detecting the weight of the incinerated material to confirm the fall, and for example, a sensor for confirming that the incinerated material is stored in the crushing unit 18 by a photo sensor or the like. It can also be used.

When the fall detecting means 102 detects that the incinerated material has dropped into the crushing section 18, the driving means 15 rotates the cutter 14 to crush the incinerated material. Then, the crushed incineration material is discharged from the small hole 21a of the housing 21 described above. Here, the small hole 21
Although the volume of the incinerated material changes depending on the size of a, for example, when the size of the small holes 21a is set to about 1 mm, the volume can be reduced by about 1/20 compared with that before pulverization.

The drop detecting means 102 is not always required to be attached.
As described above, it is sequentially detected that the incinerated material has fallen into the crushing unit 18, so that the incinerated material can be continuously crushed.

A storage section 16 is provided from the periphery of the pulverizing section 18 to the lower side for storing the incinerated material pulverized in this way and discharged from the small holes 21a. Then, by storing the incinerated materials in the storage unit 16 in this way, the incinerated materials can be collectively discarded.

As shown in the drawing, the storage unit 16 is provided with the crushing unit 1.
A casing 16a for preventing the incineration discharged from small holes 21a formed on the side surface of the housing 21 from being scattered around the casing 8;
16b provided so as to continue downward from
It is composed of The incinerated matter discharged from the small holes 21a formed on the bottom surface of the housing 21 and the incinerated matter whose scattering is prevented by the casing 16a are stored in the casing 16b. Therefore, by taking out the incinerated material from the inside of the casing 16b, the incinerated material can be easily disposed.

Next, a series of operations of the slurry processing apparatus 1 according to the present embodiment having such a configuration will be described.

First, the drive unit 3 starts driving by the control unit 9, and thereby the drum screen 2 starts rotating.
When the slurry is guided into the drum screen 2 through the introduction section 8, the slurry is subjected to centrifugal force by the rotating drum screen 2, so that the slurry does not fall directly downward (vertically) from the collection port 11, Drum screen 2
Flows on the inner wall of the substrate to form a cylindrical adhesion layer 4.

Here, it is preferable to control the amount of the slurry flowing into the drum screen 2 to a predetermined level or less. This is because if the inflow of the slurry is too large, the slurry may be discharged from the rotating drum screen 2 to the outside.

Then, whether the inflow amount of the slurry has reached a predetermined level is detected by the inflow amount detecting means 101, and when the inflow amount reaches the predetermined level, a detection signal is sent to the control unit 9. Then, the adjusting means 10 is controlled by the control unit 9 which has received the detection signal, whereby the inflow amount of the slurry is controlled.

The liquid contained in the slurry is guided to the discharge duct 12 through a number of small holes 2a formed in the side surface of the drum screen 2 due to the effect of the centrifugal force generated in the drum screen 2 driven to rotate by the drive unit 3. The slurry is discharged out of the slurry processing apparatus 1 through the discharge duct 12.

By the way, the rotation speed N of the drum screen 2
(Rpm) should be higher than a predetermined number of rotations at which the solid matter contained in the slurry can form a substantially uniform adhesion layer 4 on the inner wall surface of the drum screen 2.
However, if the rotation speed is too high, the centrifugal force becomes too strong and a part of the adhesion layer 4 is released to the outside of the drum screen 2. Therefore, the rotation speed must be lower than such a rotation speed. Therefore, the rotational speed N of the drum screen 2 has an upper limit and a lower limit.

Here, the rotation speed N is the same as the drum screen 2
Is a function of r, where r is the radius of r, and is a rotation speed in a range that satisfies 200 / r ^1/2 <N <1200 / r ^1/2 . That is, the rotation speed is 200 /
At r ^1/2 or less, the adhesion layer 4 cannot be formed well, and 1200
When the ratio is / r ^1/2 or more, the amount of solids mixed into the wastewater and passing through the small holes 2a increases, which is not appropriate.

The drum screen 2 is rotated at such a predetermined rotation speed between the upper limit and the lower limit until the flow rate of the liquid discharged from the large number of small holes 2a becomes negligible. When the dehydration detecting means 100 detects that the dehydration of the adhesion layer 4 is substantially completed, a cylindrical adhesion layer 4 having a substantially uniform thickness and height is formed on the inner wall surface of the drum screen 2.

By the way, as the dehydration detecting means 100,
It is preferable to use a mechanism such as an ultrasonic sensor or the like to measure the dimensions such as the thickness and height of the formation of the adhesion layer 4 to detect the dehydration state. Instead, as described above, the adjusting means 10
The control unit 9 calculates the rotation time of the drum screen 2 corresponding to the slurry inflow amount adjusted by (or selects one rotation time from a rotation time table stored in advance), and sets this time by a timer. A measuring mechanism can also be used. This makes it possible to perform continuous processing of the slurry at low cost without using a sensor or the like.

When the dehydration detecting means 100 detects that the dehydration has been completed, the controller 9 controls the drum screen 2
And the heating means 5a and the blowing means 6a are operated.

Here, the heating means 5a heats and dries the adhered layer 4 to change the solid material constituting the adhered layer 4 into a high calorific value dry fuel. Then, when the heating is further continued after drying, the adhesion layer 4 ignites and burns, and the combustibles are carbonized to become combustions. By such a dry incineration treatment, the weight of the introduced slurry is reduced to about 1/50.

When drying is started by heating by the heating means 5a, water contained in the adhesion layer 4 starts to evaporate, and
Starts to shrink.

When the diameter of the small hole 2a of the drum screen 2 is as large as about 1 mm, the adhesive layer 4 can easily be separated from the inner wall of the drum screen 2 only by the shrinkage during drying. When the diameter of the drum screen 2 is reduced to capture sludge or the like, the drum screen 2 cannot be separated sufficiently by drying alone, but can be easily separated from the inner wall of the drum screen 2 by shrinkage due to heating and incineration.

When the drying and incineration of the adhesion layer 4 is completed after a predetermined period of time, the operation of the heating means 5a and the blowing means 6a is stopped. At this time, the adhesion layer 4 becomes a cylindrical incinerated material which has been reduced in diameter and separated from the drum screen 2, falls down from the recovery port 11, and is easily discharged from the drum screen 2.

The incinerated matter discharged from the drum screen 2 in this way falls down (vertically), and is
8

When the fall detecting means 102 detects that the incinerated material is stored in the crushing unit 18, the driving unit 15 rotates the cutter 14 to crush the incinerated material. The crushed incinerated material has a small particle size, becomes substantially uniform granular material, and is discharged from a large number of small holes 21 a formed in the housing 21. By performing the pulverization in this way, the volume is reduced, and the handleability is improved.

Here, as means for detecting that the incinerated material has been completely discharged, for example, the drive unit 15 is stopped when a predetermined time has elapsed from the start of pulverization, and the incineration measured by the drop detecting means 102 There is something to be calculated from the weight of things. If the weight of the incinerated material is measured by the drop detecting means 102, it means that the incinerated material has not been completely discharged. Therefore, in such a case, the driving unit 15 is driven again to restart the pulverization by the cutter 14.

The incinerated material discharged from the small hole 21a of the housing 21 is stored in the storage section 16 provided below (vertically), and is taken out after being stored for a predetermined period. At the time of taking out, the casing 16a and the casing 16b are separated so that the casing 16a is separated.
a is removed from the drying device 1. Here, the casing 16a and the casing 16b do not necessarily need to be connected in a separable manner, and the crushing unit 18 and the storage unit 1 are not necessarily connected.
The casing 6 may be detachable from the slurry processing apparatus 1 as an integral casing, and the casing may be detached from the apparatus.

The exhaust gas generated during the drying and incineration is sent to the exhaust gas purifying means 7 by the blowing means 6a, where it is purified into harmless gas and exhausted out of the apparatus.

As described above, according to the present embodiment, since the slurry is dehydrated and dried and further incinerated, the weight of the processed slurry can be reduced.

Further, since the slurry is subjected to the dehydration drying treatment and the incineration treatment, the clogging of the drum screen can be surely eliminated.

(Embodiment 2) FIG. 2 is an explanatory view showing the overall configuration of a slurry processing apparatus according to Embodiment 2 of the present invention.

As shown in FIG. 2, the slurry processing apparatus 1 of the present embodiment has a drum screen 2 having a small hole 2a formed on the side surface and a recovery port 11 formed at the bottom. The drum screen 2 is rotationally driven by the drive unit 3 to centrifugally dehydrate the slurry and extract solids.

The collecting port 11 formed at the bottom of the drum screen 2 has an inner diameter larger than the outer diameter of the dried product so that the dried product that has contracted due to dehydration drying of the adhesive layer 4 can drop. And formed so as to have a diameter smaller than the inner diameter of the inner wall surface of the drum screen 2.

A drain duct 12 is attached to the drum screen 2.
00 is attached. In addition, an inlet 8 a is provided facing the inner wall surface of the drum screen 2, and an inlet 8 for introducing the slurry into the drum screen 2 is provided. Further, an adjusting unit 10 for adjusting the amount of slurry flowing into the drum screen 2 is attached to the introduction unit 8, and an inflow amount detecting unit 101 for detecting the amount of slurry flowing is provided.

An exhaust gas duct 22 is attached to the drum screen 2, and the exhaust gas duct 22 is provided with exhaust gas purifying means 7 for purifying exhaust gas.

Below the drum screen 2 is provided a pulverizing section 18 for pulverizing the dried matter which has been dehydrated and dried by the drum screen 2 and dropped from the collecting port 11 to reduce the particle size. Small holes 21a are formed in the side and bottom surfaces of the housing 21 that forms the crushing unit 18.

The cutter (pulverizing means) 14 which is rotated and driven by the drive unit 15 and pulverizes the dried product that has fallen is attached to the bottom of the housing 21.

The cutter 14 is provided with a drop detecting means 102 for detecting, by its weight, the dried product dropped on the crushing section 18. When the fall detection unit 102 detects that the dried matter has fallen into the crushing unit 18, the cutter 14 is driven to rotate by the driving unit 15 to crush the dried matter, and the crushed matter is discharged from the small hole 21 a of the housing 21. Is discharged.

Here, the volume of the dried product changes depending on the size of the small holes 21a.
mm, the volume is 1/2 of that before grinding.
It can be reduced by about 0.

Below the pulverizing section 18, there is provided an incineration section 20 for storing the dried and pulverized material thus pulverized and discharged from the small holes 21a and incinerating it. Then, by taking out the incinerated material from the incineration unit 20, it is possible to easily dispose of the incinerated material.

An air supply duct 19 is attached to the incineration section 20.

The air supply duct 19 has a heating means 5b as a heat source for incinerating the dried and pulverized matter introduced into the incineration section 20, and a heat generated by the heating means 5b.
An air blowing means 6b such as a fan that sends the air to the adhesion layer 4 in the drum screen 2 is provided.

Here, as the heating means 5b, a burner,
Various devices such as a heater such as a nichrome wire, a magnetron for generating a high frequency, and a device for heating the drum screen 2 using an electrically induced eddy current can be applied. However, in this case, a burner capable of increasing the combustion temperature is desirable because the waste heat of incineration is used for drying the adhesion layer 4.

Next, a series of operations of the slurry processing apparatus 1 according to the present embodiment having such a configuration will be described.

First, the drive unit 3 starts driving by the control unit 9 and the drum screen 2 starts rotating. Then, the slurry guided into the drum screen 2 flows on the inner wall of the drum screen 2 to form a cylindrical adhered layer 4.

The liquid contained in the slurry is guided to the discharge duct 12 through the small holes 2a formed on the side surface of the drum screen 2 and discharged to the outside due to the effect of the centrifugal force generated on the drum screen 2 which is driven to rotate. You.

When the dehydration detecting means 100 detects that the dehydration has been completed, the controller 9 controls the drum screen 2
, The heating means 5b and the blowing means 6b are operated.

When drying is started by heating by the heating means 5b, moisture contained in the adhesion layer 4 starts to evaporate, and
Begins to shrink in diameter.

Here, the inner wall surface of the drum screen 2 is
If the material is formed or coated with a material having a large contact angle with water, the adhesion layer 4 can be easily separated from the inner surface of the drum screen 2. Then, it falls from the collection port 11 and is easily discharged from the drum screen 2.

The dried matter discharged from the drum screen 2 in this manner falls down (vertically), and is
8

When the fall detecting means 102 detects that the incinerated material has been stored in the crushing unit 18, the driving unit 15 rotates the cutter 14 to crush the dried material. The pulverized dried material has a small particle size, becomes substantially uniform granular material, and is discharged from a large number of small holes 21 a formed in the housing 21.

The dried and pulverized material discharged from the small hole 21a of the housing 21 is subjected to the incineration section 2 provided below (vertically).
It is stored in 0. When the dried and crushed material is stored in the incineration unit 20 as described above, the control unit 9 introduces the next slurry to the drum screen 2 and dehydrates it to form the adhesion layer 4, and then the heating unit 5b and the blowing unit 6b is operated.

As a result, the heating means 5b heats the dry pulverized material in the incineration section 20 to ignite and burn, and the combustible material in the dry pulverized material is carbonized to become a combustible material. Further, the waste heat at the time of combustion rises to the drum screen 2 and dries the adhesion layer 4. A part of the exhaust gas at the time of drying is reused as air for combustion by the blowing means 6b, and the rest is sent to the exhaust gas purifying means 7 to be purified into harmless gas and exhausted out of the slurry processing apparatus 1. You.

After the incinerated material has been stored for a predetermined period of time, it is taken out of the slurry processing apparatus 1.

As described above, according to the present embodiment, the waste heat generated during the incineration of the dried material is recovered and reused as a heat source for drying the adhesion layer 4 in the drum screen 2. Can be reduced, and the running cost can be greatly reduced.

A heat transfer path such as a heat pipe is provided.
If waste heat from incineration is recovered by this heat transfer path and sent to the drum screen 2 for reuse as a drying heat source,
Structurally, it is possible to reuse waste heat even if the place where the slurry is dewatered and the place where the slurry is incinerated are far apart.

Further, waste heat from incineration is recovered and stored by a heat storage means (a means for temporarily storing energy and a means for subsequently using the energy).
If it is used as a heat source for subsequent drying, the drying process and the incineration process can be performed at different times.

Further, if a hot water supply pipe is wound around the incineration section 20 and the hot water supply pipe is heated by waste heat generated during incineration, the waste heat can be used as a heat source for hot water supply. Become.

In Embodiments 1 and 2 described above, if a timer or the like is provided in the control unit 9 and the slurry is dried and incinerated using midnight power during the midnight hours, power consumption can be further increased. As a result, the running cost can be significantly reduced.

[0127]

As described above, according to the present invention, since the slurry is dehydrated and dried and further incinerated, it is possible to obtain an effective effect that the weight of the slurry can be reduced. Can be

Further, according to the present invention, there is obtained an effective effect that the clogging of the drum screen can be reliably eliminated.

Further, if the adhering layer in the drum screen is dried by waste heat from incineration, the power consumption can be reduced and the running cost can be greatly reduced. The effect is obtained.

If a pulverizing section is provided, the volume is reduced by the pulverization, so that an effective effect of improving the handleability can be obtained.

If the heating means is a magnetron, it is possible to obtain an effective effect that drying and incineration can be continuously performed with a simple structure.

If the heating means is a burner, a higher combustion temperature can be obtained, so that an effective effect of efficiently drying the adhered layer with waste heat from incineration can be obtained.

By installing a heat transfer path such as a heat pipe,
The effective effect that waste heat can be reused even if the place where the slurry is dewatered and the place where the slurry is incinerated is far away is obtained.

If the heat storage means is provided, an effective effect is obtained that the drying process and the incineration process can be performed at different times.

If a hot water supply pipe is wound around the incineration section, an effective effect that waste heat can be used as a heat source for hot water supply can be obtained.

If the dehydration detecting means is provided, it is detected that the dehydration of the adhered layer has been completed, so that it is possible to obtain an effective effect that the slurry can be continuously processed.

When a timer is used as the dehydration detecting means, an effective effect that continuous processing of slurry can be performed at low cost can be obtained.

If the dewatering and incineration of the slurry is performed at midnight power, the power consumption can be further reduced, and an effective effect that the running cost can be greatly reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an overall configuration of a slurry processing apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an overall configuration of a slurry processing apparatus according to a second embodiment of the present invention.

FIG. 3 is an explanatory view showing the overall configuration of a conventional slurry processing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slurry processing apparatus 2 Drum screen 2a Small hole 3 Driving part 4 Adhesion layer 5a, 5b Heating means 11 Collection port 18 Crushing part 20 Incineration part 21a Small hole 100 Dehydration detection means

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B04B 15/02 B04B 15/02 15/10 15/10 15/12 15/12 B09B 3/00 C02F 11/00 N 5 / 00 F23G 5/033 ZABC C02F 11/00 5/46 ZABZ F23G 5/033 ZAB 7/04 ZAB 5/46 ZAB 601K 7/04 ZAB 603L 601 B09B 3/00 303M 603 5/00 P (72) Inventor Seiji Urano 1006, Kazuma, Kazuma, Kazuma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. BA40 CA00 CA05 CB08 4D059 AA00 BB01 BB17 BE38 BK11 CA06 CA14 CB19 CB27 EA16 4D065 AA11 BB01 CA05 CB03 CC03 DD12 DD24 EB20 ED06 ED16 ED18 ED35

Claims (13)

[Claims] 1. A drum screen having a small hole formed in a side surface and a recovery port provided in a bottom portion, and a centrifugal dehydration of a supplied slurry to form an adhesion layer which is an extract of the slurry inside the side surface. A slurry processing apparatus, comprising: a driving unit that rotationally drives the drum screen; and a heating unit that evaporates water contained in the extract and incinerates the extract. 2. A slurry processing apparatus according to claim 1, further comprising a pulverizing section disposed under said drum screen for pulverizing incinerated material falling off from said drum screen and dropping from said recovery port. apparatus. 3. A slurry processing apparatus according to claim 1, wherein said heating means is a magnetron. 4. A drum screen having a small hole formed in a side surface and a recovery port provided in a bottom portion, and a centrifugal dewatering of the supplied slurry to form an adhesion layer which is an extract of the slurry inside the side surface. A driving unit that rotationally drives the drum screen; an incineration unit installed below the drum screen; and an incineration unit that incinerates the extract from the collection port and reaches the incineration unit and forms an adhesion layer of the drum screen. A slurry processing apparatus, comprising: a heating unit for performing drying. 5. A small hole is formed between the drum screen and the incineration unit, and a pulverizing unit is provided to separate the extract from the drum screen and fall from the recovery port. 5. The slurry processing apparatus according to claim 4, wherein: 6. A slurry processing apparatus according to claim 4, wherein said heating means is a burner. 7. A heat transfer path according to claim 4, wherein a heat transfer path is provided for recovering waste heat at the time of incineration in said incineration section and sending it to said drum screen for drying said extract. A slurry processing apparatus according to claim 1. 8. A slurry processing apparatus according to claim 7, wherein said heat transfer path is a heat pipe. 9. Recovery of waste heat from incineration in said incineration section,
The slurry processing apparatus according to any one of claims 4 to 8, further comprising a heat storage means for storing. 10. The hot water supply pipe according to claim 4, wherein a hot water supply pipe is wound around the incineration section, and the hot water supply pipe is heated by waste heat generated during incineration in the incineration section. A slurry processing apparatus as described in the above. 11. The slurry processing apparatus according to claim 1, further comprising a dehydration detecting means for detecting that the adhesion layer has been formed on the drum screen. 12. The slurry according to claim 1, wherein the dehydration detecting means is a timer for measuring a time until the slurry becomes the adhesion layer in a dehydrated state. Processing equipment. 13. The method according to claim 1, wherein the dewatering and incineration of the slurry is carried out using midnight power.
The slurry processing apparatus according to any one of the above.