JPH0351691A - Heat coil - Google Patents

Abstract

PURPOSE:To improve the performance of draining condensed water in coil tubes and augment the drying capacity of the heat coil by stopping coil tubes, connected to a return header, at the ends connected thereto positioned at the rear in the direction of the rotation of the return header. CONSTITUTION:Coil tubes 15 connected to a return header 14 at the rear in the direction of its rotation are stopped at the connected ends by the peripheral wall 14a of the return header 14. As a result, when the coil tubes 15 and both headers 13, 14 rotate with a main piping 10, condensed water W in the coil tubes 15 is collected in the return header 14, so that the condensed water W can be efficiently discharged through a drainpipe 12. With the outflow of condensed water from the return header through rotation reduced to a minimum, the capacity of draining condensed water in the coil tubes can be improved. Hence the coil tubes can be heated with an improved efficiency and the drying capacity of the heat coil itself augmented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat coil for drying, for example, humus, okara, etc., and particularly to a heat coil that can efficiently drain condensed water in a coil tube.

[Prior Art] This type of heat coil is one in which a steam coil tube is provided inside a case into which raw material is supplied, and the raw material is dried by heating the steam coil tube.

As shown in FIGS. 3 and 4, it has a double-pipe structure consisting of a main pipe 10 rotatably suspended horizontally within the sub-body 20: a stem trachea 11 and a water return pipe 12 disposed within the pipe. A forward header 13 and a return header 14 are provided at opposite positions on the outer circumferential surface of the main pipe 10 so as to protrude in the radial direction. The header 13 is connected to the steam pipe 11, and the return header 14 is connected to the return water pipe 12, and both headers 13.1
4 are connected by a coiled tube 15 that runs concentrically around the rotation axis of the main tube 10.

This coiled pipe 15 heats the inside of the sub-body 20 by steam supplied from the steam pipe 11 via the outgoing hender 13. Therefore, as the main pipe 10 rotates, the coiled pipe 15 rotates together with both headers 13 and 14, and the raw material supplied from the inlet 21 into the sub-body 20 is uniformly heated and dried while being stirred.

Note that the supplied raw material rises like a mountain near the inlet 21, but the raw material is
5, the peak collapses and spreads toward the exit 22 side, and the tip protrusions of both headers 13 and 14 cause the exit 22 to collapse.
It is scraped out of the detachment body 20.

[Problems to be Solved by the Invention] In the heat coil configured as described above, water can be drained only when the return header is located above the rotating shaft. However, since the outgoing header and the return header are completely connected by the coiled pipe, when the return header reaches the upper position, the condensed water flows down into the coiled pipe located at the bottom or into the outgoing header, resulting in poor drainage performance. It was very bad. Therefore, it is necessary to operate with a large amount of condensed water always present in the coiled tube, which reduces the heating efficiency of the coiled tube and makes it impossible to dry the raw material efficiently.

Therefore, an object of the present invention is to increase the drying ability of the heat coil by improving the drainage performance of condensed water.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention employs a configuration in which the coil tube connected to the rear of the return header in the rotational direction is closed at its connecting end in the heat coil described above.

[Effect]

The condensed water that has flowed down and accumulated in the coil tube or forward header located below is scooped up and carried upward by the return header whose coil tube connection end on the rear side in the direction of rotation is closed, and is returned through the communication port. Drained into water pipes.

〔Example〕

Examples will be described below with reference to the drawings.

Since this embodiment has almost the same structure as the conventional heating coil described above, the same reference numerals are given and the explanation thereof will be omitted.

As shown in Figure 1, this heating coil is connected to the return header 1.
The connecting end of the coil tube 15 connected to the rear in the rotational direction (indicated by the arrow in the figure) of the coil tube 4 is closed by the peripheral wall 14a of the return header 14.

Therefore, together with the main pipe 10, the coil pipe 15 and both henders 1
3.14 rotates, the second [D(e)
), the condensed water W in the coiled pipe 15 is collected in the return header 14 and efficiently discharged to the return pipe 12.

[Effect] In the present invention, since the heat coil is configured as described above, the outflow of condensed water from the return header due to rotation is suppressed to a minimum, so that the drainage performance of condensed water in the coil pipe is improved. Accordingly, the heating efficiency of the coil tube is improved, and the drying capacity of the heat coil itself is increased.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a heating coil according to the present invention, FIG. 2 is a step diagram showing the condensed water drainage process, and FIGS. 3 and 4 are sectional views of a conventional example. 10...Main pipe, 11...Steam pipe, 12...Return pipe, 13...
Outward header, 14... Far header, 14a...
... Peripheral wall, 15 ... Coiled tube, 20 ...
...Secondary body, 21...Entrance, 22...
···Exit.

Claims (1)

[Claims] (1) A main pipe with a double-pipe structure in which a water return pipe is provided inside the steam pipe is rotatably installed horizontally in the case, and the main pipe is provided with a pair of forward header and return header that protrude in the radial direction. In a heat coil in which the forward header and the return header are in contact with each other through a coil tube on a concentric circle centered on the rotation axis of the main pipe, the coil tube connected to the rear in the rotational direction of the return header is closed at its connecting end. A heat coil characterized by: