JPS5813201B2 - Side seal device in drum dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side seal device for a drum dryer.

In other words, in a drum dryer configured so that the raw liquid is supplied above between the feed roll and the heating drum, which are connected to the upper part of the rotating heating drum, and is dried on the outer peripheral surface of the heating drum, both ends of the heating drum and the feed roll are By pre-concentrating the stock solution while holding it on the heated drum, it is possible to dry efficiently and make effective use of the conductive surface, but if the seal of the stock solution is insufficient. However, not only are they not sufficiently effective, but they also have the problem that post-treatment of the liquid leaking from the heating drum is extremely troublesome.

Conventionally, this type of sealing has been done by taking liquid leakage into consideration from the beginning and feeding the leaked liquid back into the stock liquid, or by using a seal plate, etc., but in order to achieve a complete seal, the structure becomes complicated, Another drawback is that it cannot be used if the feed roll is replaced with a soft rubber roll.

The present invention solves these drawbacks, and is capable of completely sealing the stock solution by blowing gas, and has a simple structure instead of a mechanical seal structure, which ensures good sealing and is suitable for implementation. We will provide it to you as soon as possible.

Next, the embodiment shown in the drawings will be described.

FIG. 1 shows a front view of the whole body, in which a heating drum 2 is rotatably mounted inside the main body case 1, and a rubber-lined feed roll 3 is mounted on the upper side of the heating tram 2.
and the feed roll 3 is installed so as to rotate in the opposite direction at the same circumferential speed as the heating drum 2,
A squeezing roll 4 is attached above the feed roll 3 to prevent the stock solution that thinly adheres to the feed roll 3 from going to the dry product side, and a squeeze roll 4 is attached above the feed roll 3 to prevent the raw liquid thinly attached to the feed roll 3 from going to the dry product side. A feed pipe 8 is installed vertically above the feed roll 3 so that the stock solution 10 of the viscosity aqueous solution can be supplied, and a scraper 5 is installed directly below the feed roll 3 to scrape off the dried product adhering to the outer peripheral surface of the drum. The structure is the same as the conventional structure.

In addition, nozzles 6, 6 are provided obliquely on both sides so that the gas 11 can be sprayed on both sides above the heating drum 2 and the feed roll 3, and the gas 11 is discharged by a flow rate adjustment valve 7. The device is installed so that the flow rate can be adjusted, and depending on the properties of the stock solution, air, inert gas, steam, etc. may be used as the gas.

Although FIG. 3 shows only one side, the nozzle 6 is also installed symmetrically on the other side.

During operation, the heating drum 2, feed roll 3, and squeezing roll 4 rotate as shown by the arrows, and when the raw solution is supplied from the feed pipe 8 above between the heating drum 2 and the feed roll 3, the heating drum The undiluted solution is applied onto the outer peripheral surface of the container 2 and dried while rotating, and the dried product is scraped off by the scraper 5.

In that case, the gas 11 is installed from both sides above the heating drum 2 and the feed roll 3 through the nozzles 6, 6, so that the raw liquid does not leak to the sides as shown by arrow A. The gas 1
With the spraying force of 1, the stock solution is held without being blown away and becomes preconcentrated, and is efficiently dried.

Note that the discharge flow rate of the gas 11 is adjusted by the valve 7,
It can be adapted to the properties of the stock solution.

In this way, the present invention is provided between the heating drum and the feed roll so that gas can be blown inward from the upper side using a nozzle or the like to prevent the stock solution from leaking outward. It has the features of being able to completely seal so that the stock solution does not leak to the side, having a simple structure rather than a mechanical sealing structure, being able to seal reliably and well, and being able to be carried out suitably.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of the entire drum dryer, Fig. 2 is a side view of a part thereof, Fig. 3 is an internal view of a part of the main part, and Fig. 4 is a main part. FIG. 2... Heating drum, 3... Feed roll, 10... Stock solution, 6... Nozzle,
11... Gas.

Claims (1)

[Claims] 1. In a drum dryer configured so that a raw solution is supplied above between a feed roll and a heating drum connected to the upper part of a rotating heating drum and is dried on the outer peripheral surface of the heating drum, the heating drum and the feed roll are 1. A side seal device, characterized in that the side seal device is configured such that gas can be blown inward using a nozzle or the like on the upper side of the gap to prevent the raw solution from leaking outward.