JPH03258335A - Glass-lined mixing drier for bulk material - Google Patents

Abstract

PURPOSE:To obtain an excellent mixing and drying effect and to prevent local overheating by providing a scraping blade at the central region of the vessel main body and a disintegrating blade close to the wall of the main body. CONSTITUTION:A heating medium jacket 7 is provided outside the glass-lined vessel main body 1, and a glass lining rotary member 10 piercing a shaft-seal bearing 11 at the center of an upper end plate 2, supported by the bearing and rotated around a vertical center axis X is provided in the vessel 1. A paddle-type scraping blade 10b is fixed to the center shaft 10a in stages to form the scraping blade A of the rotary member 10. A supporting arm 10d is radially and symmetrically extended from the upper and lower parts, and a glass lining supporting rod 13 is provided between the upper and lower arms away from and in parallel with the inclined side surface of the main body 1. A freely rotatable disintegrating blade 14 is loosely mounted on the supporting rod 13 in contact with the inner surface of the main body 1. Consequently, an excellent mixing and drying effect is produced, and local overheating is prevented.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an apparatus for efficiently heating and drying powder and granules charged in batches in a container while mixing the entire area when drying the powder and granules, particularly When powder and granules contain corrosive substances or handle metal-phobic substances, it is possible to use glass linings that do not cause corrosion or contamination, and are suitable for refining high value-added chemicals and pharmaceuticals such as antibiotics. This invention relates to a powder mixing dryer.

(Prior art) A powder dryer is equipped with screw blades arranged along the inner surface of the inclined side wall of a conical container equipped with a heating jacket, and the screw blades revolve around the central axis of the container while rotating on their own axis.
Utility Model Publication No. 50-38842, Special Publication No. 51-13911, Utility Model Publication No. 54-20126, Japanese Patent Application Publication No. 1987-93820
It is known by the number etc. This device has the function of performing relatively efficient mixing over the entire area by scraping up the powder and granules near the interior wall of the machine using screw blades and collapsing them from the top, and quickly drying the powder and granules by circulating the mixture.

(Problems to be Solved by the Invention) However, in the above-mentioned prior art device, mechanically, the rotation and revolution of the screw blades are driven by separate drive sources, and are designed to prevent interference between the two transmission systems within the device. Since it is necessary to provide an automatic drive system built into the revolution system to match the joints, there is always a risk that oil leaks from the joints and contaminates the powder product. Furthermore, if corrosive vapors such as chlorine are generated from the powder or granules being handled, many parts of the in-machine moving parts must be made of highly corrosion-resistant metal. Even so, this type of apparatus cannot be used to treat substances that are contaminated by metals because metal ions may be eluted and abrasion metals may be mixed in due to abrasion of powder or granules.

In order to make the interior of the container more resistant to corrosion, it is desirable to make these components made of glass-lined steel. However, it is difficult to use glass lining for screw blades with complex shapes, and even the inner surface of a container with a simple shape can be damaged due to repeated high-temperature firing. When glass lining is installed, it becomes distorted due to thermal distortion, making it impossible to maintain a constant gap between the inside wall of the vessel and the screw blade edge. It is difficult to involve the powder and granules in the mixing process, and they are overheated on the heating surface, resulting in deterioration or scorching.

(Means for Solving the Problems) The present invention has been made in order to provide a solution to the problems of the above-mentioned powder and granular material mixing drying of the prior art. To scrape up the powder inside the shaped container, a rotary scraping blade section with scale-shaped scraping blades arranged in rows is provided at the central axis position, and the tilting of the container body is integrated between supporting arms extending radially from above and below. Parallel unraveling blade support rods are provided at intervals from the side surfaces to enable glass-lined steel formation and upper-shaft drive of this rotating member, and freely rotating unwinding blade bodies are loosely fitted onto the support rods. A loosening wing portion is configured to rotate and come into contact with the side surface of the glass-lined container to give a loosening effect to and move the powder particles stagnant near the surface.

That is, in the glass-lined powder/granule mixing dryer of the present invention, an upper mirror portion having a raw material inlet and a steam outlet is sealingly coupled to a conical container body whose diameter decreases toward the powder/granule discharge port at the bottom. A sealed corrosion-resistant container with glass lining on the inside is formed, and a heat transfer jacket is attached to the outside of the container body. A glass lining rotating member that is rotatably driven is provided, and the rotating member is integrally formed with a central shaft portion to form a rake-up blade section in which scale-shaped rake-up blades are arranged in stages, and also integrally formed symmetrically from the upper and lower parts. A support arm is formed that extends radially, and a parallel glass lining support rod part is provided between the upper and lower support arms at a distance from the inclined side surface of the container body, and a loosening rod that freely rotates in contact with the inner surface of the container body is provided on the support rod. It is characterized by loosely fitted wing bodies.

(Function) In the present invention, the powder and granules in the container body are lifted up by scale-shaped raking blades in which raking blades are arranged in multiple stages and are driven to rotate around the vertical central axis. Since the granules are given a continuous twisting arrangement, they are effectively raked up in the center, and the powder behaves as if it falls to the lower parts, so it flows into the empty space after being raked up and is effectively mixed. Ru. However, unlike stirring a liquid, powder and granules are difficult to circulate due to extrusion flow, so even if the surface of the glass lining is smooth, sticky powder may stagnate on the uneven inner surface of the container body. However, in the present invention, the loosening blade pushes the powder away and moves, and at this time, due to the difference in resistance between the center side of the container and the side wall side, or due to contact with the side wall, it rotates around the support rod part, Since it acts to loosen the binding of the powder near the side wall and separates it from the side wall, stagnation on the side wall is prevented and uniform mixing action is promoted. Further, since the unraveling blade is loosely fitted onto the support rod with a large gap, there is no risk of damaging the glass lining even if it comes into contact with the side wall of the glass lining of the container body.

(Example) Hereinafter, the glass-lined powder/granule mixing dryer of the present invention will be specifically explained using examples to clarify its properties. FIG. 1 shows an overall longitudinal sectional side view of a mixing dryer according to an embodiment of the present invention.

The body of the powder mixer of this embodiment is a conical container body (1) whose inner surface is covered with a glass lining, and an upper mirror part (2) is clamped by sealing the joint flange part of the container body (1). (3) to form a sealed corrosion-resistant container with a glass lining inside. The upper mirror part (2) is provided with a raw material inlet (4) that opens when charging powdered raw materials and a steam outlet (5) for discharging generated steam outside the vessel. is provided with a powder discharge port (6) that opens when the mixed and dried powder is taken out of the container, and the container body (1) is formed into a conical shape whose diameter decreases toward the bottom discharge port, A heat medium jacket (7) for heating the powder inside the container is attached to the outside thereof, and the heat medium is passed through the heat medium inlets and outlets (8) and (9).

A glass lining rotating member 0ω for effectively stirring and mixing the powder inside the container is supported by its central shaft (10a) passing through the shaft seal bearing OD at the center of the upper mirror part, The container main body is rotated around the vertical central axis (x) by the driving unit Q21.

The rotating member (10) includes a rake-up blade (10b) having at its outer end a scoop-shaped blade inclined in the rake-up direction with respect to its central axis (10a) in several stages in the vertical direction. They are arranged in rows, and are integrated with the central shaft part by welding at their bases, and together with the shaft end blades (10c) formed at the lower end, these serve as scraping blades that scrape up the powder and granules in the central area of the container. (A) Become. Further, as the rotating member 0ω, support arms (10d) are symmetrically formed in a radial manner, which are integrally welded from above and below the central shaft portion (10a).

These parts (10a) (10b) of the rotating member (In)
) (10c) Since (10d) is a steel base material that is connected and integrated with a relatively large radius of curvature, it is possible to cover it with a glass lining.

Furthermore, in the present invention, the above-mentioned upper and lower support arms (10d) (1
0d) In between, a glass lining support rod 0■ parallel to the inclined side surface of the container body at a distance is connected by a corrosion-resistant and high-strength synthetic resin connector and attached to the rotating member 0ω.

As shown in Figures 2 and 3 above the support rod part a, loosening blades (b) that freely rotate in contact with the inner surface of the container body are loosely fitted and arranged in rows with a relatively large gap. Wing part (B)
form. Each loosening wing body (b) has a cylindrical part (1
It has a short cylindrical shape with a spiral (14b) wound around the outer periphery of 4a) and is made of synthetic resin, and the cylindrical part (14b) is provided with an opening (14c) that allows the powder to pass through. FIG. 4 shows another loosening wing body (14^), which has a cage-shaped cylindrical part (14a') with a large opening to facilitate passage of powder and granules.

(Effects of the Invention) As described above, in the powder mixing dryer of the present invention, all internal equipment is made of a glass lining and a part of corrosion-resistant resin, so it has high corrosion resistance. There is no fear of contamination due to leakage, no mixing of worn metals, and the mixing action of powder and granules is efficiently raked up by the raking blades (A) in the center area of the vessel, and the unevenness of the glass lining surface is removed near the wall. Even if there is a problem, the loosening blade part (B) exerts a loosening effect with good contact between the loosening blades and mixing is performed in the entire area, so the mixing and drying effect is excellent and local overheating does not occur. is obtained.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of the entire powder and granular material mixing dryer according to an embodiment of the present invention, Fig. 2 is a cross-sectional plan view of a portion showing the rotational operation status of the loosening blade, and Fig. 3 is a cross-sectional view of the loosening blade. FIG. 4 is a partial longitudinal sectional side view of one example, and FIG. 4 is a perspective view of the other side. (1)... Conical container body, (2)... Upper mirror part, (
3)... Clamp, (4)... Raw material inlet, (5)...
...Steam outlet, (6)...Powder discharge port, (7)...
・Heat medium jacket, (8) (9)...Heat medium inlet/outlet, 0
ω... Rotating member, (10a)... Central shaft portion, (10
b)... Raising wing, (10c)... Shaft end wing, (10
d)...Support arm, 0θ...Shaft seal bearing part, (I21・
... Drive part, ■... Support rod part, Q4) (14A),
,, wing body, (14a) (14a') ---cylindrical part, (14b) (14b') vertical central axis, wing part. ...Spiral, (14c) ...Port, (X) (A) ...Rake-up wing part, (B) ...Scrap Figure 3, Figure 4

Claims (1)

[Claims] An upper mirror portion having a raw material inlet and a steam outlet is sealed and joined to a conical container body whose diameter decreases toward the powder discharge port at the bottom to form a sealed corrosion-resistant container with an inner glass lining. A heating medium jacket is attached to the outside of the container, and a glass lining co-rotating member is installed inside the container, which is supported through the shaft seal bearing at the center of the upper mirror part and is driven to rotate around the vertical center axis. integrally forms a rake-up wing part with scale-shaped rake-up blades arranged in stages, and also integrally forms support arms extending radially symmetrically from the upper and lower parts, and between the upper and lower support arms. A glass lining support rod part parallel to the inclined side surface of the container body is provided at a distance from the inclined side surface of the container body, and a loosening wing body that freely rotates in contact with the inner surface of the container body is loosely fitted on the support rod. Lining powder mixing dryer.