JPH1015373A - Twin-screw type continuous kneader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a twin-screw type continuous kneader which can improve the kneading performance of a powder particulate material to the degree of a muller or a vibrating kneader. SOLUTION: The inner wall of a kneading/stirring part 2B in a casing 2 is large enough to almost reach the tip of a paddle 7 and at the same time, the opening of a discharge aperture 3 in the casing 2 is smaller than the effective crosssectional area of the kneading/stirring part 2B. In addition, a feed screw 8 of a specified length is fitted to a position from which the kneading/ stirring part 2 begins at rotating shafts 6, 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal casing in which two rotating shafts are suspended in a horizontally long casing, and the powder and granules are kneaded and stirred by a paddle attached to the rotating shaft. The present invention relates to a twin-screw continuous kneading apparatus that discharges and discharges.

[0002]

2. Description of the Related Art The kneading performance of a twin-screw continuous kneading apparatus is inferior to that of a kneading apparatus which crushes and granulates with a crusher or a vibrating system. For example, a method has been adopted in which the length of the trough is extended to extend the residence time of the powder or the rotational speed of the shaft is increased.

[0003]

However, none of the above methods is sufficient to improve the kneading properties.
In particular, there is a problem that the kneading effect of the incineration fly ash of general garbage does not exhibit the originally required kneading effect, and a large amount of the chemical is required as compared with other types of kneading apparatuses.
The present invention has been made to solve the above problems,
It is an object of the present invention to provide a twin-screw continuous kneading apparatus capable of obtaining kneading properties close to those of a mara type kneading apparatus or a vibration kneading apparatus.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a twin-screw continuous kneading apparatus according to the present invention is arranged such that the inner wall of a kneading / stirring unit is sized so as to be close to the tip of a paddle, and the casing is formed. The opening of the discharge port of the shing is narrower than the effective cross-sectional area of the kneading / stirring unit, and a feeding screw of a predetermined length is mounted on the rotating shaft at the start of the kneading / stirring unit. As a result, it becomes possible to enhance the kneadability of the powder and discharge the powder.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIGS. The twin-screw continuous kneading apparatus according to the present invention comprises a hopper-shaped supply section 2A for supplying and supplying a powdery material such as fly ash from a supply port 1 and a discharge port 3 at one end. And a kneading / stirring unit 2B which is a horizontally long cylindrical casing 2 having an opening. The opening of the discharge port 3 is smaller than the effective sectional area of the kneading / stirring unit 2B. In the kneading / stirring unit 2B, two rotating shafts 6 and 6 having one end connected to a driving motor 5 as a driving means and the other end rotatably supported are mounted horizontally.

[0006] A paddle 7 for kneading, stirring and transporting the powder and granules is provided on the rotating shafts 6 and 6 over a substantially entire length of the rotating shafts 6 and 6 except for a feeding screw 8 described later. The rotary shafts 6, 6 at the starting position of the kneading / stirring unit 2B are provided with a feeding screw 8 having blades having a length of 2 leads. I have. The kneading / stirring unit 2B of the casing 2 has an inner wall which is close to the paddle 7 and the tip of the feeding screw 8 and has an elliptical shape as a whole.

The ceiling surface of the kneading / stirring unit 2B at a position close to the supply unit 2A is formed higher than other parts, and a water supply port 9 for adding water to the granular material is provided therein. An upper limit level sensor 10 and a lower limit level sensor 11 are mounted on the upper surface of the wall of the supply section 2A on the side of the drive motor 5, so that the powder at the time of starting and stopping is provided. The level of the granular material can be detected. Further, a fixed gate 12 is provided at a boundary position between the supply section 2A and the kneading / stirring section 2B.

A procedure for kneading and agitating the powder and granules by the twin-screw continuous kneading apparatus having such a configuration will be described. First, the apparatus is started up when the granular material is put into the supply section 2A from the supply port 1 and the upper limit level sensor-10 detects that the level is full. In other words, the drive motor 5 is driven to rotate the rotary shafts 6 and 6, and the mixing and stirring are started while feeding the supplied powder and granules into the mixing and stirring section 2B. At this time, the amount of the granular material fed into the kneading / stirring unit 2B by the fixed gate 12 at the boundary position between the supply unit 2A and the kneading / stirring unit 2B is suppressed to a fixed amount. It should be noted that the supply of the powder is kept below the level of the level sensor 11.

The amount of the powdered material fed into the kneading / stirring unit 2B is increased by the feeding screw 8 rotating together with the rotary shafts 6, 6 into the kneading / stirring unit 2B in a larger amount than when only the paddle 7 is used. It is pushed in the direction of the outlet 3. The inner wall of the kneading / stirring unit 2B has a size close to the paddle 7 and the tip of the feeding screw 8, and the opening of the discharge port 3 is smaller than the effective sectional area of the kneading / stirring unit 2B. Therefore, the granular material in the kneading / stirring unit 2B is in a pressurized state.

In this state, when the kneading and stirring of the granules are performed by the paddle 7, the granules in the kneading / stirring unit 2B are in a pressurized state and cannot move freely. The granules and the paddle 7 are strongly pressed against each other and rubbed, whereby a kneading action is obtained, and as a result, the kneading performance is improved. While sufficiently kneaded in this manner, the granular material is gradually conveyed and discharged from the discharge port 3.

When the discharge is continued in this manner, and the supply of the granular material is stopped, and the amount of the granular material charged into the supply section 2A decreases, the lower limit level sensor 11 operates. As a result, the drive motor 5 is stopped, and the discharge of the powder is stopped. By stopping the driving motor 5 after the operation is continued for a predetermined time, the powder and the granular material can be completely discharged.

[0012]

As is apparent from the above description, in the present invention, two rotary shafts each having a paddle mounted thereon are mounted in a horizontally long casing having a supply port at one end and a discharge port at the other end. A twin-screw continuous kneading apparatus, wherein the inner wall of the kneading / stirring unit in the casing is sized so as to be close to the tip of the paddle, and the opening of the casing outlet is effective for the kneading / stirring unit. It is smaller than the cross-sectional area, and a feeding screw of a predetermined length is installed at the start position of the kneading / stirring unit on the rotating shaft, so that the effect of kneading the powder and granules can be enhanced, and the incineration of refuse can be reduced. Even light powders such as ash can be sufficiently kneaded.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a twin-screw continuous kneading apparatus according to the present invention.

FIG. 2 is an enlarged view taken along the line AA in FIG.

[Explanation of symbols]

 2 Casing 2B Kneading and stirring section 3 Discharge port 6, 6 Rotary shaft 7 Paddle 8 Feed screw

Claims (1)

[Claims] 1. A twin-screw continuous kneading apparatus comprising two rotating shafts each having a paddle mounted therein in a horizontally long casing having a supply port at one end and a discharge port at the other end. The inner wall of the kneading / stirring unit 2B of the casing 2 is sized to be close to the tip of the paddle 7 and the opening of the outlet 3 of the casing 2 is narrower than the effective cross-sectional area of the kneading / stirring unit 2B. A twin-screw continuous kneading apparatus characterized in that a feeding screw 8 of a predetermined length is mounted at a position of the rotary shafts 6, 6 at the beginning of the kneading / stirring unit 2B.