JP2006300498A - Coil type drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent efficiency degradation by setting a coil rotation direction in a certain direction or by reducing a reverse rotation time by decreasing a moving speed of a processing object by a torsional angle of a coil. <P>SOLUTION: In this coil type drier, drying efficiency can be remarkably increased by stabilization of load capacity in a casing and uniform movement of a processing object by cutting the torsion of a heating coil into pieces and by forming agitating blades with feeding action in the cut parts. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, by slowing down the moving speed of the processed object due to the coil twist angle, the direction of the coil rotation is fixed, or the drain generated in the coil due to the decrease in the reverse rotation time makes the discharge stop state by the reverse rotation in a short time. This is a means to prevent the efficiency from being reduced.

  According to the principle of drying, the rotational speed of the screw coil is normally 2 to 10 R / M. However, if the rotational speed of the screw coil is operated, the arrival time of the processed material from the inlet to the outlet is 10 to 10. Although it seems to be about 30 minutes, the time required for normal drying is almost 1 hour or more. For this reason, the treatment product is reversely rotated by the reverse rotation of the screw coil to extend the staying time. However, the drainage amount during that time is reduced, the capacity is reduced, and the collateral phenomenon of the treatment product in the container occurs.

  If the coil pitch in Fig. 1 (A) is made small to slow down the feed, the treated material will be attached to the outer circumference of the coil as shown in Fig. 1 (B), causing a co-rotation phenomenon and insufficient coil contact. The amount of heat transfer is reduced and the drying effect is reduced. In addition, the processed material is less likely to fall in the direction of the central shaft, and the drying effect is significantly reduced. In the case of fine powders, this phenomenon usually occurs when the processed material contains a lot of moisture, and it is difficult to clean the shaft and the coil support part.

  When the coil pitch is increased, the processed material falls to the shaft side, and almost all of the processed material does not attach to the upper surface of the coil, but the feed speed becomes faster and the blade rotation direction needs to be changed again. Discharging is difficult, and heat efficiency is lowered, resulting in poor drying.

Although the coil screw direction differs depending on the continuous type and the batch type, the following methods are conceivable.
(1) Repeat of right screw, joint material, right screw, joint material (2) Repeat of right screw, joint material, right screw, joint material, repeated left screw, joint material, left screw, joint material ( 3) All combinations of right screw, joint material, left screw, joint material, right screw, joint material, left screw, joint material and more

  FIG. 1 shows a conventional coil dryer, which has a continuous coil shape, so that the processed material introduced from 8 has a short time to reach 9 and results in an insufficiently dried product. In order to prevent this, the coil pitch A in FIG. 2 is reduced, and the feed of the processed material by the coil is completely interrupted by the joint material of D, and the movement is only moved by the pressing pressure of the processed material. The processed material falls in the direction of C in Fig. 2, and the effect of diffusing the processed material is exerted by the falling motion and the collision with the shaft to promote drying. In order to increase the heat transfer area of the coil, it is one of the means to make the A dimension in FIG. 2 smaller than the A dimension in FIG.

  FIG. 5 is a reference diagram of claim 3. When it is combined by repeating the left screw, joint material, right screw, and joint material, it is more effective to make it difficult for the heating coil to collect drainage. It is possible to shorten the length of the heating coil and use it as a means to prevent drain clogging.

Claims (3)

  With or without a jacket that holds steam, hold sludge or powder containing moisture, or residues (hereinafter referred to as treated products) in a container, and perform stirring, mixing, and conveying operations in the container. In a dryer that heats the processed material and evaporates moisture by winding a coil with blades around a cylindrical screw and rotating the coil while steaming it, the conventional coil is wound endlessly, that is, fully threaded. Rotating in a certain direction by using several screw types as one block, or by setting each coil with zero torsion, that is, each coil with no twist, as a structure heat source body joined together by several blocks A coil-type drying device that can adjust the moving speed of the processed material in the container and adjust the residence time.   By providing a steam supply head pipe in the device, supplying steam to each one to several blocks from this pipe, while drain drain head pipe has a structure that can collect the drain from each supply point A coil-type drying device capable of obtaining a high-efficiency drying capability as the deformation device according to claim 1.   In this drying method, a continuous charging method, that is, a process product is continuously input from one end of the container, and a dry product processed product is continuously discharged from the other end, and a batch input method, that is, an outlet for discharging the processed material in the container is provided. Coil-type drying device that can be applied either in a closed manner, after being put in a lump and staying within the drying time, and then opening the outlet and discharging the processed material.

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