JP2000042396A - Granulating and drying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granulating and drying device capable of supplying dried granular soil whose grain sizes are less than a prescribed size and is uniform. SOLUTION: A partition plate 8 is provided at the boundary between a granulating chamber 2 and a drying chamber 1 in a rotary drum, and a rotary blade 3 is disposed at the lower part of the granulating chamber 2. The kneaded soil charged from a hopper 4 is rolled while crushing the soil by the rotary blade 3, and the roundish granular soil whose grain sizes are less than a prescribed size is allowed to overflow the partition plate 8, is fed to the drying chamber 1, and is dried by indirection heating in a heating tube 17, then the dried granular soil is discharged from an outlet hood 6 provided at an outlet end 5 of the drying chamber 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for granulating and drying sludge and the like.

[0002]

2. Description of the Related Art Various types of sludge such as water sludge discharged in large quantities are dried and discarded, and others are granulated and dried and reused for agricultural and horticultural soil.
These sludges to be reused are first dried in the sun or the like, and then subjected to a kneading step, a granulating step, and a drying step to become granular agricultural and horticultural soil.

[0003] In the above-mentioned production process of agricultural and horticultural soil, for the purpose of reducing equipment costs and rationalizing the transport of raw materials, there are cases where both the granulation and drying processes are performed by an integrated apparatus. Is a granulation drying apparatus disclosed in Japanese Utility Model Laid-Open No. 6-56693. This granulating and drying apparatus is shown in FIG.
As shown in FIG. 5, a screw feeder 42 for supplying sludge supplied from a hopper 41, a cylindrical rotary dryer 43, a granulating cylinder 44 added to an inlet end of the rotary dryer 43, and a rotary dryer 43. It is provided with a chamber 45 for removing dried granular soil provided at the outlet end, and an exhaust chamber 46 for exhausting steam evaporated from sludge.

The granulating cylinder 44 is provided with a scraper 47 close to the inner peripheral surface of the granulating cylinder 44 so that sludge adhering to the inner peripheral surface of the granulating cylinder 44 is scraped off. The sludge supplied from the screw feeder 42 is rounded and rounded while rolling in the granulating cylinder 44, and is sent to the rotary dryer 43 as granular soil.

[0005] A jacket 48 for heating gas is provided on the outer periphery of the rotary dryer 43, and the granular soil fed from the granulating cylinder 44 is dried. The dried granular soil is supplied to an outlet 49 provided at the lower end of the outlet chamber 45.
Is discharged from

In this apparatus, a gas is supplied from a supply port 50 provided in the take-out chamber 45, and steam generated when the granular soil is dried is guided into the granulating cylinder 44, so as to come into contact with cold sludge. It is stated that the dew condensation can function as a binder or adjust the moisture of the sludge. The supplied gas is discharged out of the device from the discharge port 51 of the exhaust chamber 46.

[0007]

In the conventional granulating and drying apparatus described above, the sludge is granulated only by rolling in the granulating cylinder, so that the size of the granular soil varies and extremely large granular There is a problem of soil mixing. For example, dry granular soil for agricultural and horticultural use is required to have a diameter of at most 10 mm or less, and dry granular soil greatly exceeding this size must be removed before shipment.

Accordingly, an object of the present invention is to provide a granulating and drying apparatus capable of supplying a rounded dry granular soil having a predetermined size or less.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cylindrical drying chamber which is disposed substantially horizontally and is rotatably driven at the raw material supply end side. A granulating and drying apparatus for granulating and drying the raw material supplied to the granulating chamber and discharging the raw material from the discharge end of the drying chamber includes rotating blades for stirring the raw material in the granulating chamber. Thus, a configuration was adopted in which an annular partition plate was provided at the boundary between the drying chamber and the granulation chamber.

That is, an annular partition plate is provided at the boundary between the granulation chamber and the drying chamber, and the massive soil supplied from the kneading step is stored in the granulation chamber for a certain period of time. The massive soil is finely crushed into lumps of a predetermined size or less, these crushed masses are rolled to take corners, and the rounded granular soil overflows from the partition plate and is sent to the drying chamber. It was. Further, since the rotating blades knead and soften the massive soil, it has an effect of forming a granular soil having a smooth roundness.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 show an overall view of a granulating and drying apparatus. 1 is a front view, FIG. 2 is a plan view,
FIG. 3 is a side view. This granulation drying apparatus is provided in a cylindrical drying chamber 1 that is driven to rotate, a cylindrical granulation chamber 2 that is also connected to the inlet end of the drying chamber 1, and a granulation chamber 2. It is basically composed of a rotary blade 3, a hopper 4 for supplying a mass of kneaded soil to the granulation chamber 2, and an outlet hood 6 provided at an outlet end 5 of the drying chamber 1 for discharging dry granular soil. I have.

The drying chamber 1 and the granulation chamber 2 are formed by an integral rotating cylinder 7 having both ends opened.
An annular partition plate 8 is provided at the boundary between the and the granulation chamber 2, and a sprocket 9 and two tires 10 are attached to the outer periphery of the rotating drum 7. The rotating drum 7 has a bearing 12 on a gantry 11.
The tire 10 is supported by two pairs of rollers 13 which are mounted via a sprocket. The sprocket 15 is mounted on a rotating shaft of a motor 14 equipped with a speed reducer, and the chain 16 is wound around the sprocket 9. It is supposed to be.

A plurality of heating tubes 17 are passed through the drying chamber 1 in the axial direction near the inner peripheral wall. These heating tubes 17 are connected to a steam pipe 19 via a rotary joint 18 attached to the outlet hood 6 and heat the drying chamber 1 with steam supplied from the steam pipe 19. Therefore, high thermal efficiency can be secured. In addition, a drain pipe 20 is also attached to the steam pipe 19.

An entrance hood 21 is provided on the side of the granulation chamber 2 of the rotary drum 7, and both ends of the rotary drum 7 are
And the outlet hood 6. Entrance hood 2
1, a gas supply port 22 and a raw material outlet 23 for cleaning are also provided.

The rotary blade 3 is connected to a rotary shaft 26 by a flange 24 and a tightening bolt / nut 25 so that the rotary blade 3 can be replaced with another type of rotary blade. The rotating shaft 26 is taken out to the outside through the entrance hood 21 and
It is supported by two bearings 27 mounted on the motor 1, and is connected to a rotating shaft of a motor 29 by a coupling 28.

As shown in FIGS. 4 (a) and 4 (b), the rotating blades 3 are arranged at a lower portion of the rotating drum 7, and are arranged at regular intervals in an axial direction at a paddle-shaped wing body 30 perpendicular to the rotating direction. Are provided radially every four sheets. These rotary blades 3 are rotated in a direction opposite to the rotation direction of the rotary drum 7, and crush the massive kneaded soil 31 rolling at the lower part of the granulation chamber 2. By rotating the rotating blades 3 in the direction opposite to the rotating drum 7, the kneaded soil 31 moving together with the rotating drum 7 can be efficiently crushed from the opposite direction.

The rounded granular soil that has been crushed by the rotating blades 3 and tumbled overflows from the partition plate 8 and is sent into the drying chamber 1. At this time, the kneaded soil 31 that is not sufficiently granulated has poor fluidity, and the fine kneaded soil 31
Since the slab penetrates beneath the large kneaded soil 31, the partition plate 8 cannot overflow, and only sufficiently granulated granular soil overflows. For this reason, even if the length of the granulation chamber 2 is short, a sufficient granulation action is performed. Further, by changing the number of rotations of the rotating blades 3, the degree of crushing can be adjusted to change the size of the granular soil to be produced. By changing the number of rotations of the rotary blades 3 according to the physical properties of the kneaded soil 31 to be supplied, a granular soil of a certain size can be obtained without being affected by the physical properties of the kneaded soil 31.

The granular soil fed into the drying chamber 1 is heated and dried by the heating tube 17 while rolling in the drying chamber 1 and sent out from the outlet end 5 to the outlet hood 6. The outlet hood 6 has a gas outlet 3 for discharging gas supplied from a gas supply port 22 of the inlet hood 21.
2 is provided, and the vapor generated from the granular soil by this gas is discharged to the outside of the apparatus. The dried granular soil is discharged from an outlet 33 provided below the outlet hood 6.

FIGS. 5A and 5B show a rotary blade 34 of another form. The rotating blades 34 are provided with four blade-shaped blades 35 radially parallel to the rotating direction at regular intervals in the axial direction. Since the rotating blades 34 shear the kneaded soil, they are suitable for crushing hard kneaded soil.

In the above-described embodiment, paddle-shaped blades and blade-shaped blades are shown as rotary blades for crushing massive kneaded soil.
A propeller-like rotating blade having a wing body inclined with respect to the rotation direction may be employed. Also, the number of wings arranged radially can be arbitrarily selected.

[0021]

As described above, the granulating and drying apparatus of the present invention is provided with an annular partition plate at the boundary between the granulating chamber and the drying chamber.
The bulk soil supplied from the kneading step is stored in the granulation chamber for a certain period of time, and the bulk soil is finely crushed into lumps having a predetermined size or less by rotating blades provided in the granulation chamber. Since the rolling granularity is rounded, the rounded granular soil overflows from the partition plate and is sent into the drying chamber, the dried granular soil having grains equal to or smaller than a predetermined size can be supplied. Further, since the rotating blades also have a function of kneading and softening the massive soil, it is possible to supply a dry granular soil having a smoother roundness.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a granulation drying apparatus.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a longitudinal sectional side view taken along the line III-III in FIG. 2;

4A is an enlarged cross-sectional view of a main part of FIG. 1, and FIG. 4B is a cross-sectional view taken along line IV-IV of FIG.

5A is a front view showing a rotating blade of another embodiment, and FIG. 5B is a longitudinal side view thereof.

FIG. 6 is a longitudinal sectional view showing a conventional granulation drying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room 2 Granulation room 3 Rotating blade 4 Hopper 5 Outlet end 6 Outlet hood 7 Rotating drum 8 Partition plate 9 Sprocket 10 Tire 11 Mount 12 Bearing 13 Roller 14 Motor 15 Sprocket 16 Chain 17 Heating tube 18 Rotary joint 19 Steam pipe 20 Drain pipe 21 Inlet hood 22 Supply port 23 Outlet 24 Flange 25 Bolt nut 26 Rotating shaft 27 Bearing 28 Coupling 29 Motor 30 Blade body 31 Kneaded soil 32 Discharge port 33 Extract port 34 Rotating blade 35 Blade body 41 Hopper 42 Screw feeder 43 Rotary dryer 44 Granulation cylinder 45 Extraction chamber 46 Exhaust chamber 47 Scraper 48 Jacket 49 Outlet 50 Supply port 51 Outlet

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshihide Takemoto 1-12-19 Kitahorie, Nishi-ku, Osaka-shi F-term in Kurimoto Iron Works Co., Ltd. 3L113 AA06 AB03 AB05 AC05 AC16 AC31 AC40 AC42 AC45 AC46 AC48 AC49 AC57 AC58 AC59 AC63 AC68 AC73 AC76 AC79 BA02 DA24 4G004 HA01 HA02

Claims (1)

[Claims] 1. A cylindrical granulating chamber is also added to a raw material supply end side of a cylindrical drying chamber which is arranged substantially horizontally and driven to rotate, and a raw material supplied to the granulating chamber is formed. In the granulation drying apparatus for drying granules and discharging from the discharge end of the drying chamber, the granulation chamber is provided with a rotary blade for stirring the raw material,
A granulation and drying apparatus, wherein an annular partition plate is provided at a boundary between the drying chamber and the granulation chamber.