JPH06273081A - Spiral type heat exchanger - Google Patents

Abstract

PURPOSE:To improve a heat exchanging efficiency without engaging with fiber sludge in a spiral type heat exchanger using fluid containing fibrous material. CONSTITUTION:A spiral type heat exchanger formed by winding a heat transfer plate 1 comprises stud pins 2 as spacers at a one-way channel 3, and disturbance bars 5 at the other channel 4. The bars 5 are intermittently arranged in a zigzag manner, and mounted at an angle to extend in an advancing direction of fluid. Accordingly, since the intermittent bars 5 are arranged in the zigzag manner, the fluid is dispersed and mixed to improve heat transfer performance. Since the fluid has an angle for extending in its advancing direction, it has the same effect as extension of an width of the bars supported between the plates 1 to provide a strong holding effect and to improve a heat exchanging efficiency by a turbulent flow effect of the fluid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral heat exchanger for treating a fluid, which mainly contains fibrous sludge, slurry and the like, for example, a slurry solution of rhoose, vinyl chloride or the like.

[0002]

2. Description of the Related Art In a conventional spiral heat exchanger, as shown in FIG. 4, a heat transfer plate 1 is spirally wound via a spacer 2 at regular intervals to form fluid passages 3 and 4. is doing. Fluid inlets and outlets 6 and 7 are partitioned by a central partition plate 8 of the center core. Reference numerals 9 and 10 denote fluid inlets and outlets provided on the end edge of the heat transfer plate 1 at the end of winding.

Conventionally, a stud pin is often used as the spacer 2, and as shown in FIG. 4, the stud pin keeps the gap of the fluid flow path 3 and the heat transfer plate 1 is made to resist the pressure of the medium. It is designed to retain strength.
Further, a structure in which a fibrous sludge is prevented from being caught by using a stud pin in one flow passage and a distance bar in the other flow passage is disclosed in JP-A-60-155892.
It is disclosed in the publication.

[0004]

Among the conventional examples, in the spiral heat exchanger using the stud pins as the spacers, when used for the fluid containing the fibrous sludge, the sludge is caught by these pins and the Blockage occurs and the flow paths 3, 4
There is a problem that the heat exchange rate in the inside is lowered. On the other hand, in the case where the distance bar is used instead of the stat pin for the other flow path, catching does not occur with respect to the fluid containing fibrous sludge, but the width of the heat transfer plate between the distance bars. Since it is necessary to dispose them at intervals in the direction, there is a problem that the dispersion and mixing action of the fluid becomes insufficient with the distance bar parallel to the width direction. There was also a problem that the pressure received was weak and the heat transfer plate was deformed.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a spiral heat exchanger having a high heat exchange rate for a fluid containing fibers.

[0006]

In order to achieve the above object, a heat transfer plate is wound around spacers at regular intervals, and heat is exchanged between adjacent flow paths via the heat transfer plate. In the spiral heat exchanger described above, a stud pin is used as a spacer for maintaining the flow path on one side, and a distance bar is used as a spacer for maintaining the flow path on the other side, and the distance bars are intermittently arranged in a staggered pattern. The spiral heat exchanger was installed and installed at a certain angle so as to spread in the flow direction of the fluid.

[0007]

In the present invention, the distance bars provided in the other flow path are intermittently arranged in a zigzag pattern, and are attached in such a manner as to spread in the flow direction of the fluid (8-shaped). Just as when using a wide distance bar, the pressure received by the heat transfer plate is reinforced, and because it has an angle, the fiber containing fluid does not get caught in the flow direction, and the caught fiber grows. The flow path is no longer blocked. In addition, the flow path extends obliquely in a staggered manner, and the distance bars at each stage repeat expansion and contraction of the flow path to give a turbulent flow action, thus repeating the dispersion and mixing of the fluid containing fibers. As a result, the heat exchange efficiency can be increased.

[0008]

Embodiments will be described below with reference to the drawings shown as embodiments. Reference numeral 1 denotes a heat transfer plate, which is partitioned by a central partition plate 8 of the center core, and is spirally wound at regular intervals. Two
Is a stud pin and constitutes one flow path 3. Reference numeral 4 denotes the other flow path, which is held at a distance by a distance bar 5. The distance bars 5 are intermittently arranged in a zigzag pattern, and are attached at an angle so as to spread in the fluid flow direction. A fluid such as fibrous sludge passes through the other flow path 4, but the distance bar 5 is arranged in an eight-shape so as to spread in the traveling direction, so that the edge does not get caught along the bar along the bar. After the transfer, the staggered bars disperse and mix and have a turbulent effect, which improves the heat exchange efficiency.

Since each of the distance bars 5 is inclined at a certain angle, the pressure receiving pressure is increased as in the case of using a wide bar in the width direction of the heat transfer plate 1.
The space between them is maintained. Further, even when the heat transfer plate 1 is wound, the gaps in the width direction are staggered and continuous in the traveling direction, so that the gaps between the flow paths can be eliminated.

If a fluid containing fibrous material is caught on the edge of the distance bar, it can be easily eliminated by flowing the fluid in the opposite direction.

[0011]

According to the present invention, the distance bar is used as the other flow path for flowing the fluid containing the fibrous material, and the distance bars are intermittently arranged in a zigzag manner, and further mounted so as to spread in the traveling direction of the fluid. The flow channel spacing is maintained reliably, and the fibrous fluid advances along the bar without being caught by the edges, and the flow channel is repeatedly expanded and contracted.
The heat transfer performance can be improved, the pressure loss of the fluid can be prevented from increasing, and the heat exchange efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a heat transfer plate of a spiral heat exchanger of the present invention.

FIG. 2 is an enlarged sectional view of the heat transfer plate.

FIG. 3 is a plan view of the heat transfer plate.

FIG. 4 is a cross-sectional view of a conventional spiral heat exchanger.

[Explanation of symbols]

 1 Heat transfer plate 2 Stud pin 3, 4 Flow path 5 Distance bar

Claims (1)

[Claims] 1. A spiral heat exchanger in which a heat transfer plate is wound around spacers at regular intervals and heat is exchanged between adjacent flow paths via the heat transfer plate. The stud pin is used as a spacer for maintaining the distance between the two, and the distance bar is used as the spacer for maintaining the distance between the flow paths on the other side, and the distance bars are intermittently arranged in a staggered manner and spread in the fluid flow direction. A spiral heat exchanger characterized by being installed at an angle.