JPH05203391A - Multi-tube cylindrical heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if slime is generated in the main body due to organic substances contained in sewage or seawater used as heat source water, the main body does not need to be disassembled and can be easily and easily. The heat exchange efficiency is improved by making it possible to wash. [Structure] A cylindrical body 21 to which a cleaning fluid Q is pumped from the outside is provided at an axial center portion of a cylindrical main body 1 in which a large number of fluid pipes 4 are arranged, and the cleaning wall is provided on a peripheral wall of the cylindrical body 21. Nozzle holes 21 for radially ejecting the working fluid Q are formed, and the cleaning fluid Q is ejected from these nozzle holes 21 so that every corner of a large number of fluid pipes 4 can be cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tube cylindrical heat exchanger.

[0002]

2. Description of the Related Art FIG. 3 shows the structure of a conventional general multi-tube cylindrical heat exchanger. In the figure, 1 is a lid body 2,
It is a cylindrical main body whose both ends are closed by 3, and inside it, a large number of cooling fluid pipes 4 which are composed of thin tubes and are arranged along the axis of the main body 1 are provided. 6
It is supported and fixed by. Reference numerals 7 and 8 denote chambers formed at both ends of the main body 1, and one chamber 8 is partitioned by a partition plate 9 into two chambers 8A and 8B. Reference numeral 10 denotes a heat medium inlet port provided in the main body 1 corresponding to the chamber 8A for inflowing the heat medium F, and 11 denotes the heat medium F flowing out in the main body 1 corresponding to the chamber 8B. It is an outlet port for the heat medium for making it.

A heat source water inlet port 12 for letting in heat source water W is provided at one end of the main body 1 between the tube plates 5 and 6, and at the other end of the main body 1.
An outlet port 13 for heat source water for letting out the heat source water W is provided. A plurality of support plates 14 are fixed between the tube plates 5 and 6 in the main body 1 so as to alternately traverse the cooling fluid pipes 4 from opposite directions. A zigzag-shaped flow path 15 is formed in the shaft 1 in the axial direction.

In the multi-tube cylindrical heat exchanger having the above structure,
The heat medium F such as CFC gas flowing in from the heat medium inlet port 10 enters the chamber 7 from the chamber 8A through a large number of cooling fluid pipes 4 and then from this chamber 7 to another cooling fluid pipe 4
To the chamber 8B, and flows out from the chamber 8B via the heat medium outlet port 11. On the other hand, the heat source water W that has flowed in from the heat source water inlet port 12 has a zigzag-shaped flow path 1
After passing through the inside 5, the heat source water outlet port 13 flows out. While the heat source water W flows through the zigzag flow path 15, the heat medium F is indirectly exchanged with the heat medium F passing through the cooling fluid pipe 4.

[0005]

By the way, in recent years, sewage, river water or seawater has been used as a heat source water for the above-mentioned multi-tubular cylindrical heat exchanger for economical reasons. It is getting more and more. However, sewage and the like contain a large amount of impurities such as organic substances, so that scale and slime are likely to be generated in the main body 1, and if they adhere to the surface of the cooling fluid pipe 4, the film thermal resistance is increased. Therefore, the heat exchange efficiency is remarkably deteriorated, so that it is required to regularly clean the inside of the main body 1. However, a large number of cooling fluid pipes 4 are provided in the body 1.
Are arranged at an extremely small pitch, so it is difficult to wash the details by simply disassembling a part of the main body 1, and the washing effect cannot be expected sufficiently.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to easily and surely clean every corner of a fluid pipe in the main body which is in close contact, and use sewage or the like as heat source water. An object of the present invention is to provide a multi-tube cylindrical heat exchanger that can improve heat exchange efficiency in such a case.

[0007]

In order to achieve the above object, a multi-tube cylindrical heat exchanger according to the present invention has a large number of fluid tubes arranged in a cylindrical main body along the axis of the main body. In addition, forming a zigzag-shaped flow path that passes through the periphery of each fluid pipe in the direction along the axis, a heat medium that flows into the main body and flows out through the respective fluid pipes, and In a cylindrical shell-and-tube heat exchanger configured to indirectly exchange heat with the heat source water that flows in and flows out through the zigzag-shaped flow path, washing at the axial center position in the main body A cylindrical body for supplying the working fluid is arranged, and a large number of nozzle holes for radially ejecting the cleaning fluid toward the zigzag-shaped flow path in the main body are formed on the peripheral wall of the cylindrical body.

[0008]

According to the present invention, even if slime is generated in the main body due to the use of sewage containing a large amount of impurities such as organic matter as the heat source water, if the cleaning fluid is pumped into the cylinder, The cleaning fluid is radially ejected from a large number of nozzle holes on the peripheral wall of the nozzle, and this ejection force can effectively clean every corner of the fluid pipe. Therefore,
It is possible to easily clean the inside of the main body without the trouble of releasing and disassembling a part of the main body and cleaning it, and it is easy to properly maintain the heat exchange efficiency.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a longitudinal sectional view and a lateral sectional view, respectively, showing a multi-tube cylindrical heat exchanger according to an embodiment of the present invention, in which the same parts as those of the conventional one shown in FIG. , The same reference numerals are given, and the description thereof is omitted.

In FIGS. 1 and 2, reference numeral 21 denotes a cylindrical body which is provided at the axial center of the cylindrical main body 1 and to which a cleaning liquid Q as a cleaning fluid is supplied, and the cleaning liquid Q is provided on the peripheral wall thereof. A large number of nozzle holes 22 are formed to eject radially.

In the multi-tube cylindrical heat exchanger having the above structure,
While passing Freon F as a heat medium through the cooling fluid pipe 4,
By flowing the sewage W as the heat source water through the zigzag-shaped flow path 15, indirect heat exchange is performed between the fluorocarbon F and the sewage W. Slime or the like tends to be generated in the main body 1, especially around the cooling pipe 4 by the organic matter contained in the sewage W, but by optionally pumping the cleaning liquid Q into the cylindrical body 21, Nozzle holes 22 on the peripheral wall
The cleaning liquid W is radially ejected from the above, and the jet power causes the slime or the like to be washed out and is discharged from the heat source water outlet port 11 together with the sewage W through the heat source water outlet port 13.
Therefore, it is possible to easily and effectively clean the dirt around each cooling fluid pipe 4 without regularly disassembling the main body 1, and as a result, it is possible to contribute to the improvement of the heat exchange efficiency. it can.

The cleaning fluid is not limited to the cleaning liquid Q described above, but a gas such as compressed air may be used.

[0013]

As described above, according to the present invention, as sewage containing a large amount of impurities such as organic substances is used as heat source water, slime or the like is generated in the main body, which is the surface of the fluid pipe or the like. If it adheres to the cleaning fluid, the cleaning fluid can be ejected radially from a large number of nozzle holes in the peripheral wall of the cylindrical body simply by pumping the cleaning fluid into the cylindrical body located at the axial center position of the main body. Therefore, it is possible to effectively clean every corner of the fluid pipe in a close contact state. Therefore, it is possible to easily clean the inside of the main body without the trouble of releasing and disassembling a part of the main body and cleaning. Therefore, even when sewage or the like is used as the heat source water for economical reasons, it is easy to maintain the heat exchange efficiency properly.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a multi-tube cylindrical heat exchanger according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the multi-tube cylindrical heat exchanger.

FIG. 3 is a vertical cross-sectional view showing a conventional multi-tube cylindrical heat exchanger.

[Explanation of symbols]

 1 Main Body 4 Cooling Pipe 15 Zigzag Channel 21 Cylinder 22 Pore F Heat Medium Q Cleaning Fluid W Heat Source Water

Claims (1)

[Claims] 1. A cylindrical main body is provided with a large number of fluid pipes along the axis of the main body, and zigzag flow passages passing around the respective fluid pipes in the direction along the axis. A heat medium that is formed and flows into the main body and flows out through the fluid pipes, and a heat source water that flows into the main body and flows out through the zigzag-shaped flow path are indirectly connected through the fluid pipes. In a cylindrical multitubular heat exchanger configured to perform heat exchange, a cylindrical body for supplying a cleaning fluid is arranged at an axial center position in the main body, and the cleaning fluid is provided on the peripheral wall of the cylindrical body in the main body. A multi-tube cylindrical heat exchanger having a large number of nozzle holes radially ejected toward the zigzag flow path.