CN102322736B - Rake type dryer - Google Patents

Abstract

The invention provides a rake dryer, which includes a body shell, a drying chamber, a rotating shaft, a rake rod, a water vapor outlet, a material outlet, vacuum equipment and other components of a conventional dryer. The rake rod is connected on the rotating shaft, and the rake rod is fist-shaped, T-shaped or inverted L-shaped, and the rake rod is composed of a rake root and a rake head. In the direction from the rotating shaft to the rake head, the cross-sectional area of the rake root gradually decreases, and the cross-sectional area of the rake head is larger than the cross-sectional area of the tail of the rake root. There are connected water pipes inside the rake bar and the inside of the rotating shaft. There is a semi-pipe heating pipeline in the shell of the body, and the wall material of the drying chamber inside the body is made of stainless steel or carbon steel. The equipment can be used for drying slurry, paste, granular, powder and fibrous materials, and can be used in chemical, food, medicine, dye and other industries.

Description

rake dryer

technical field

The invention relates to a dryer, in particular to a rake dryer using a fist-shaped rake.

Background technique

Usually, the dryer is composed of the rotor part, the machine shell part, the vacuum system, the heating part, the transmission system and the electric control system and other parts. The rotor part of the ordinary dryer does not help the material to turn over much, the moisture in the material is not easy to release, the drying efficiency is low, and the energy consumption is large.

The description of the patent application No. 200710021519.8 discloses a rake dryer, which mainly adopts a hollow main shaft to be installed in the inner cylinder of the tank. Shaft and empty stomach rake head, small steam consumption, fast heating. But the shape of its rake bar has not been improved, and the overturning effect of the material has not been brought into play.

Contents of the invention

Purpose of the invention: to overcome the defects of low drying efficiency of traditional dryers, and provide a rake dryer with uniform material turning, thorough and rapid drying.

Technical solution: The rake dryer of the present invention includes a body shell, a drying chamber, a rotating shaft, a rake rod, a water vapor outlet, a vacuum device, a material outlet and other components of a conventional dryer. The rake rods are evenly distributed and connected to the rotating shaft. Composed of a rake root and a rake head, the rake rod is fist-shaped, T-shaped or inverted L-shaped; in the direction from the rotating shaft to the rake head, the cross-sectional area of the rake root gradually decreases, and the cross-sectional area of the rake head is larger than that of the rake root and tail The cross-sectional area of the head; the projected width of the rake head in a plane perpendicular to the axis of rotation is greater than the projected width of the rake root in this plane.

The projection of the rake head in a plane parallel to the rotation axis is equal to or larger than the projection of the rake root tail in the plane.

There is a water pipe in the rake rod inside the rake rod, and a middle water pipe in the rotating shaft inside the shaft; the water pipe in the rake rod and the water pipe in the rotating shaft are connected to each other, and the water pipe in the rotating shaft is connected to the external pipeline for inputting hot water or cold water.

The shell of the machine body may contain a semi-pipe heating pipeline, and steam or hot oil is passed into the pipeline to provide a heat source for the material.

The rake rod is movably connected to the rotating shaft, and the rake rod can swing 0-15° left and right along the axial direction of the rotating shaft, which further facilitates stirring and turning over materials.

The material of the wall surface of the drying chamber in the shell of the body in contact with the material is preferably stainless steel or carbon steel, which has good corrosion resistance and heat resistance.

Beneficial effects: the material of the present invention is heated in the airtight drying chamber through the drying outdoor jacket to conduct heat energy to the material, and at the same time, the left and right rake rods fixed on the rotating shaft are continuously turned over the material, so that the moisture on the surface and inside of the material is vaporized , and then the water vapor in the drying chamber is extracted by the high vacuum equipment to reach the material drying equipment. This equipment can be widely used in the drying treatment of slurry, paste, granular, powder and fibrous materials. It is an ideal drying equipment for chemical, food, medicine, dye and other industries.

Description of drawings

Fig. 1 is a partial structure schematic diagram of the present invention;

Fig. 2 is a schematic view of the front view of a rake bar of the present invention;

Fig. 3 is a side view structure diagram of a rake bar of the present invention.

In the figure, 1. Substrate shell; 2. Water vapor outlet; 3. Rake rod; 4. Rotating shaft; 5. Material outlet; 6. Half-pipe heating pipeline; 7. Rake head; 8. Rake root; 9. Rake rod Middle water pipe; 10, middle water pipe of rotating shaft.

Detailed ways

Below, the present invention will be described in more detail in conjunction with the drawings and embodiments.

As shown in accompanying drawing 1, in the rake dryer including the body shell 1, drying chamber, water vapor outlet 2, rotating shaft 4, rake rod, vacuum equipment, material outlet 5 and other components of a conventional dryer, the rake rods 3 are evenly distributed and connected on reel 4.

As shown in accompanying drawings 2 and 3, the rake bar 3 is composed of a rake root 8 and a rake head 7, and the rake bar 3 is in the shape of a fist, a T or an inverted L shape; in the direction from the rotating shaft 4 to the rake head 7, The cross-sectional area of the rake root 8 gradually decreases, and the cross-sectional area of the rake head 7 is larger than that of the tail of the rake root 8; The projection width.

Example 1

The rake head 7 is T-shaped.

The projection of the rake head 7 in a plane parallel to the rotating shaft 4 is equal in width to the projection of the tail of the rake root 8 in this plane.

The inside of the rake bar 3 has a rake bar middle water pipe 9, and the inside of the rotating shaft 4 has a rotating shaft middle water pipe 10; the rake bar middle water pipe and the rotating shaft middle water pipe are connected to each other, and the rotating shaft middle water pipe 10 is connected to an external pipeline for heating by inputting hot water materials.

The body casing 1 contains a semi-pipe heating pipeline 6, and steam is passed into the pipeline to provide a heat source for the material.

The material of the wall surface of the drying chamber inside the body shell 1 in contact with the material is stainless steel, which has good corrosion resistance and heat resistance.

Example 2

The rake head 7 is an inverted L shape.

The projection of the rake head 7 in a plane parallel to the rotating shaft 4 is larger than the projection of the tail of the rake root 8 in this plane.

The inside of the rake bar 3 and the inside of the rotating shaft 4 have connected water pipes, which are connected with the external pipeline for inputting cold water to cool the material.

The body shell 1 contains a semi-pipe heating pipeline 6, and hot oil is passed into the pipeline to provide a heat source for the material.

The rake rod 3 is movably connected to the rotating shaft 4, and the rake rod 3 can swing 0-15° left and right along the axial direction of the rotating shaft 4, which further facilitates stirring and turning over materials.

The wall surface material of the drying chamber inside the body shell 1 that is in contact with the material is carbon steel, which has good corrosion resistance and heat resistance.

In the above-mentioned embodiments 1 and 2, the material is in the airtight drying room, and the heat energy is conducted to the material through the heating of the body shell 1, and at the same time, the rake rod 3 connected to the rotating shaft 4 is continuously turned over the material, so that the moisture on the surface and inside of the material Gasification, and then the water vapor in the drying chamber is drawn out by the high-vacuum equipment through the water vapor outlet 2 to achieve the drying of the material, and the dried material is discharged from the material outlet 5.

Claims (4)

1. a rake type drier, other parts that contain body fuselage (1), hothouse, rotating shaft (4), raking arm (3), steam outlet (2), vacuum equipment, material outlet (5) and conventional drying machine, it is characterized in that: raking arm (3) is uniformly distributed and is connected in rotating shaft (4), raking arm (3) is comprised of rake root (8) and drag head (7), and raking arm (3) is T-shaped or inverted L-type;

By rotating shaft (4), on the direction of drag head (3), the cross-sectional area of rake root (8) reduces gradually, and the cross-sectional area of drag head (7) is greater than the cross-sectional area of rake root (8) afterbody; The projection width of drag head (7) in the plane perpendicular to rotating shaft (4) is greater than the projection width of rake root (8) in this plane;

There is water pipe in raking arm (9) described raking arm (3) inside, and there is water pipe in rotating shaft (10) rotating shaft (4) inside; In water pipe in raking arm (9) and rotating shaft, water pipe (10) is interconnected, and in rotating shaft, water pipe (10) is connected with outer pipeline, for input hot water or cold water;

It is upper that described raking arm (3) is movably connected in rotating shaft (4), and raking arm (3) can respectively wave 0-15 ° along the axial left and right of rotating shaft (4).

2. according to the described rake type drier of claim 1, it is characterized in that: the projection of described drag head (7) in the plane that is parallel to rotating shaft (4) is wide with the projection of rake root (8) afterbody in this plane.

3. according to the described rake type drier of claim 1, it is characterized in that: in described body fuselage (1), contain semi-canal type heating pipe line (6).

4. according to claim 1,2 or 3 described rake type drier, it is characterized in that: the wall surface material that the inner hothouse of described body fuselage (1) contacts with material is stainless steel or carbon steel.

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