JPH063089A - Tubular heat exchanger with temperature controller - Google Patents

Abstract

(57) [Abstract] [Purpose] To make a tube heat exchanger with a temperature controller compact and easy to install. [Composition] A temperature provided with a control valve mechanism for adjusting a bypass flow rate of a fluid flowing into the heat transfer tube side with respect to the heat transfer tube side between a body section having the heat transfer tube and a header section having a flow path partition plate. The temperature of the fluid flowing out from the header portion is controlled by interposing a bypass fluid into the fluid flowing out from the heat transfer tube side through the control portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a tube heat exchanger with a temperature control device, and more particularly to a tube heat exchanger with a temperature control device for downsizing the heat exchange device and facilitating installation. Is.

[0002]

2. Description of the Related Art FIG. 18 shows an example of a conventional tube heat exchanger, which is composed of a body portion 2 accommodating a heat transfer tube 1 and a header portion 4 provided with a flow path partition plate 3. While the fluid 6a flowing from the inlet pipe 5a, for example, the low temperature heated fluid flows through the heat transfer pipe 1, the inlet pipe base 2a to the body 2
It is heated by the heated fluid 7 that has flowed in, and becomes a high temperature fluid 6b that flows out from the outlet pipe 5b. In the figure, 2b is an outlet nozzle, and 8 is a tube plate.

As a method of controlling the temperature of the fluid 6b,
As shown in FIG. 19, a control valve 9 is provided in the vicinity of the barrel inlet nozzle 2a, and a temperature controller 11 is supplied with a signal from the temperature detector 10.
20 and 21, a bypass conduit 12 is provided between the inlet pipe 5a and the outlet pipe 5b of the fluid 6 and the bypass valve 13 and the valve 14 are connected to each other.
The method of adjusting the opening degree of (or the three-way valve 15) is generally widely used.

By the way, in the temperature control method for adjusting the flow rate of the fluid 7 shown in FIG. 19, the selection of the control valve 9 may be restricted from the viewpoint of the property of the fluid 7, for example, the corrosiveness of the fluid.
Not applicable to temperature control of all tubular heat exchanges. In addition, the vicinity of the body inlet nozzle stub 2a of the tubular heat exchanger is usually a place where other pipelines and the like are congested, and there is a drawback that the installation of the control valve 9 is likely to be restricted in terms of space space and the like. is there. Further, since the heat transfer surface of the heat transfer tube 1 is interposed between the fluid 7 and the fluid 6, there is a drawback in that the response and controllability are slightly lacking.

On the other hand, the same applies to the temperature control method for adjusting the bypass flow rate of the fluid 6a shown in FIGS.
The valve 1 is installed in the external conduit that connects to the header section 4 of the tubular heat exchanger.
3, the valve 14, the three-way valve 15, the bypass pipe 12 and the like are installed, so that a lot of work is required for the installation work of the heat exchanger, and a large piping space is required outside the header portion 4, so that the pipe heat There is a drawback that the exchange device itself becomes extremely large.

[0006]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present invention has the above-mentioned problems in the conventional tube heat exchanger, that is, in the tube heat exchanger of the type in which the temperature is controlled by adjusting the bypass amount of the fluid,
The problem is that the heat exchanger itself becomes large as a whole, requires a large installation space outside the header part, and also requires a lot of labor for installation and piping of the heat exchanger, resulting in a sharp rise in equipment costs. The present invention provides a tubular heat exchanger with a temperature control device, which enables downsizing of the heat exchange device and reduction of the labor required for installation.

[0007]

According to the present invention, a fluid 6a flowing into the heat transfer tube 1 side is transferred between a body portion 2 having a heat transfer tube 1 and a header portion 4 having a flow path partition plate 3. The fluid 6b flowing out from the heat transfer tube 1 side is provided with the temperature control unit 16 including the control valve mechanism 26 for adjusting the bypass flow rate to the heat tube 1 side.
The temperature of the fluid flowing out from the header portion 4 is controlled by mixing the bypass fluid 6c into the inside, which is the basic configuration of the invention.

[0008]

The function of the temperature controller 1 is based on the signal from the temperature detector 10.
The control motor 17 is actuated via 1 to drive the control valve mechanism 26 of the temperature control section 16. That is, the passage cross-sectional area of the fluid passage 22 is adjusted by driving the valve body 23, and the bypass flow rate 6c of the fluid 6a flowing into the heat transfer tube 1 with respect to the heat transfer tube 1 is changed. As a result, the temperature of the fluid 6b flowing out of the heat transfer tube 1, that is, the fluid 6b flowing out of the outlet tube 5b of the header portion 4 changes, and the passage cross-sectional area 2
By adjusting 2 as appropriate, the temperature of the fluid 6b flowing out from the outlet pipe 5b is controlled.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same reference numerals are used for the same parts as those in FIGS. FIG. 1 shows an example of installation of a tubular heat exchanger with a temperature control device for one circuit and two passes according to the first embodiment of the present invention, and FIG. 2 shows a temperature control valve forming an essential part of the present invention. FIG. 3 is a vertical sectional side view of the portion, and FIG.

As shown in FIG. 1, the tubular heat exchanger A with a temperature control device comprises a body 2, a temperature control valve portion 16 and a header portion 4 as main components. Then, the control motor 17 is driven via the temperature controller 11 by the signal from the temperature detector 10, so that the arm linkage 1
The valve rod 19 is driven via 8 to change the flow rate of the bypass fluid 6c of the low-temperature heated fluid 6a in the temperature control valve portion 16 and control the temperature of the high-temperature heated fluid 6b.

The body 2 is the same as the body of the conventional heat exchanger shown in FIG. 18, in which the heat exchange tube 1 is arranged, and the heating fluid 7 is provided on the outer wall of the body 2. An inlet nozzle 2a and an outlet nozzle 2b are provided, and a flange 2c for connection is provided at the open end of the body 2. Further, the heat exchange tube 1
The end of the body on the opening side is held by a so-called tube sheet 8, and the tube sheet 8 divides the flow passage space of the heating fluid 7 in the body 2 and the temperature control section 16 described later in an airtight manner. ing.

The header portion 4 is the same as the header portion 4 of the conventional heat exchanger shown in FIG. 18, and the flow path partition plate 3 is horizontally arranged inside thereof, whereby The passage for the heated fluid 6 is divided into two sections. An inlet pipe 5a and an outlet pipe 5b are provided on the wall surface of the header portion, and a flange 4a for connection is provided on the opening end side.

As shown in FIGS. 2 and 3, the temperature control section 16 includes a short pipe 20 having flanges 20a at both ends, and a short pipe 2.
A partition wall 21 arranged horizontally in 0, a fluid passage 22 formed in the partition wall 21 in a substantially circular shape, and a disc-shaped valve plate 23 for opening and closing the fluid passage 22 and a valve plate 23 are rotatable. The control valve mechanism 26 includes a valve rod 19 that supports the valve rod 19, and a bush 24 and a bearing mechanism 25 that axially support both ends of the valve rod 19. That is, by driving the valve rod 19 to bring the valve plate 23 to the horizontal position, the fluid passage 22 is fully closed and the bypass flow 6c of the heated fluid 6 becomes zero. as a result,
The high temperature heated fluid 6b has the highest temperature. Also, the valve plate 2
By setting 3 to the vertical posture, the fluid passage 22 is fully opened, and the low temperature heated fluid 6a (or most of it) becomes the bypass flow 6c. As a result, the temperature of the high temperature heated fluid 6b becomes the lowest temperature.

The temperature control section 16 is airtightly inserted between the body section 2 and the header section 4 via a flange 20a. Further, the flow path partition plate 3 in the header portion 4 and the flow path partition wall 21 in the short pipe 20 are formed to have substantially the same cross-sectional shape, and the end faces of both are abutted in an airtight manner.
As a result, both the high temperature and low temperature heated fluids 6a and 6b are airtightly divided. 2 and 3, 26 is a packing, 27 is an O-ring, 28 is a gland packing, and 29 is a packing retainer. Further, although the fluid 6 is heated by the fluid 7 in the present embodiment, it goes without saying that the fluid 6 may be cooled by the fluid 7.

In FIG. 1, the short pipe 20 of the temperature control section 16 is flange-connected to the body section 2 and the header section 4, respectively, but it is also possible to use screw-in connection instead of flange connection. is there. Further, in this embodiment, the valve rod 1
9, control valve mechanism 2 including valve plate 23 and fluid passage 22
6 has a so-called butterfly valve structure, the fluid passage 22
It goes without saying that the control valve mechanism for adjusting the opening degree of may be of a plug type. Furthermore, in this embodiment, the valve rod 19 is rotated by the control motor 17 and the arm linkage 18, but the drive mechanism of the valve rod 19 has any structure, for example, a hydraulic or pneumatic drive mechanism. May be.

FIG. 4 and FIG. 5 show another example of the temperature control section 16 which is an essential part of the present invention.
The fluid passage 22 and the valve plate 23 are semicircular (or half-moon shaped). Fluid passage 22 and valve plate 23
By making the shape of FIG. 4 and FIG. 5 smaller, the length dimension of the temperature control unit 16 becomes smaller, and the tubular heat exchanger can be made even smaller and more compact.

FIGS. 6 and 7 are a vertical side view and a vertical plan view of a temperature control unit used in the third embodiment of the present invention, which are used for a so-called one-circuit four-pass type tube heat exchanger. Is. In the one-circuit four-pass type tube heat exchanger, as shown in FIG. 8, the low-temperature heated fluid 6a passes through the first pass, the second pass, the third pass and the fourth pass in the body portion 2. The high-temperature heated fluid 6b passes through each of the heat exchange tubes 1 to be formed. That is,
As shown in FIG. 8, a flow path partition wall 21 having a T-shaped cross section is disposed in the short pipe 20 of the temperature control unit 16, and a semicircular fluid is provided in a horizontal portion 21 a of the flow path partition wall 21. A passage 22 is formed. A semicircular valve plate 23 is provided in the fluid passage 22. By rotating the valve plate 23, the fluid passage 22 for bypassing the low temperature heated fluid 6a is provided.
Is adjusted to control the flow rate of the bypass flow 6c flowing into the high temperature heated fluid 6b. 6 and 7, the support mechanism and drive mechanism for the short pipe 20 and the valve rod 19 are exactly the same as those in FIGS. 1 to 3.

9 and 10 are a vertical side view and a vertical plan view of the temperature control unit used in the fourth embodiment of the present invention. The fluid passages in the temperature control unit 16 of FIGS. 6 and 7 are shown. The shape of the valve 22 and the valve plate 23 is a quarter circle. By making the shapes of the fluid passage 22 and the valve plate 23 a quarter circle, the length dimension of the temperature control unit 16 is reduced, and the tubular heat exchanger can be made more compact.

11 and 12 are a vertical side view and a vertical plan view of the temperature control unit used in the fifth embodiment of the present invention.
It is used for a so-called two-circuit, two-pass type tube heat exchanger. In the two-circuit, two-pass type tube heat exchanger,
As shown in FIG. 13, the low temperature heated fluids 6a1 and 6a2 are the first
The fluid flows through the first path of the circuit, the second path of the first circuit, the first path of the second circuit, and the second path of the second circuit, and becomes high-temperature heated fluids 6b1 and 6b2. That is, as shown in FIG. 13, a flow path partition wall 21 having a cross-shaped cross section is arranged in the short pipe 20 of the temperature control unit 16.
The two horizontal portions 21a1 and 21a2 and the two vertical portions 21b1 and 21b2 forming a fluid passage form four compartments of the fluid passage, and the inlet pipe 5a1 of the first circuit and the inlet pipe 5a2 of the second circuit are formed. The outlet pipe 5b1 of one circuit and the outlet pipe 5b2 of the second circuit communicate with each other.

Therefore, in the temperature control section 16 of this embodiment, as shown in FIG. 12, semicircular fluid passages 22a and 22b are formed in the horizontal portions 21a1 and 21a2 on both sides of the flow path partition wall 21.
Are respectively provided, and the respective fluid passages 22a and 22b are provided.
The control valve mechanism 26a for the first circuit and the control valve mechanism for the second circuit are provided by disposing the semicircular valve plates 23a, 23b and the valve rods 19a, 19b for rotating them, respectively. 26
b is formed.

14 and 15 are a side view and a front view of the tube heat exchanger according to the present embodiment. The temperature control unit 16 includes a control motor 17a for the first circuit and a control motor for the second circuit. A motor 17b is provided and the arm linkage 18a is provided.
Through the valve stem 19a of the first circuit control valve mechanism 26a,
Further, the valve rods 19b of the second circuit control valve mechanism 26b are respectively driven via the arm linkages 18b. When the first circuit control valve mechanism 26a is operated, the fluid passage 22a
Through, a portion of the low temperature heated fluid 6a1 is bypassed into the high temperature heated fluid 6b1 and its temperature decreases, and
When the circuit control valve mechanism 26b is activated, the fluid flow path 22
A part of the low temperature heated fluid 6a2 is bypassed into the high temperature heated fluid 6b2 through b, and the temperature thereof is lowered.

16 and 17 are a vertical sectional side view and a vertical plan view of a temperature control unit used in the sixth embodiment of the present invention. The first example of the temperature control unit 16 shown in FIGS. Fluid passage 22a and valve plate 23 of circuit control valve mechanism 26a
The fluid passage 22b and the valve plate 23b of the control valve mechanism 26b for "a" and the second circuit are each formed in a quarter circle shape. The fluid passages 22a, 22b and the valve plates 23a, 23
By making b a quarter circle, the temperature control valve 16 can be shortened, and the tubular heat exchanger can be made compact and compact.

[0023]

According to the present invention, the body portion 2 having the heat transfer tube 1 is provided.
And the header section 4 provided with the flow path partition plate 3, the temperature control section 1 provided with the control valve mechanism 26 for controlling the bypass flow rate of the fluid 6a flowing into the heat transfer tube 1 side with respect to the heat transfer tube 1 side.
6, the temperature of the fluid 6b flowing out from the outlet pipe of the header portion 4 is controlled by mixing the bypassed fluid 6c into the fluid 6b flowing out of the heat transfer pipe 1. As a result, it is possible to significantly reduce the installation space of the tube heat exchanger without requiring a large piping space as in the case where a bypass circuit for temperature adjustment is formed outside the conventional header portion 4, The number of steps required to install the tube heat exchanger is reduced, and the installation cost can be significantly reduced. Further, since the temperature control unit 16 is attachable / detachable between the header unit 4 and the body unit 2, the temperature control unit 16 can be omitted to easily form a tubular heat exchanger without a temperature control device. It is possible and practically very convenient. Further, the temperature controller 16 has a relatively simple structure and can be easily miniaturized. As a result, the external dimensions of the tubular heat exchanger with temperature controller itself are significantly smaller than the external dimensions of the conventional tubular heat exchanger in which the temperature adjustment bypass circuit is formed by external piping. The device can be made compact. As described above, the present invention has excellent practical utility.

[Brief description of drawings]

FIG. 1 shows an installation example of a tube heat exchanger with a temperature control device according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of a temperature control unit that is an essential part of the present invention.

FIG. 3 is a sectional view taken along the line E-I of FIG.

FIG. 4 is a vertical cross-sectional side view of a temperature control unit used in the second embodiment.

5 is a cross-sectional view taken along line E-I of FIG.

FIG. 6 is a vertical sectional side view of a temperature control unit used in a third embodiment.

FIG. 7 is a cross-sectional plan view of a temperature control unit used in the third embodiment.

FIG. 8 is an explanatory diagram of a flow passage of a fluid to be heated of a tubular heat exchanger for one circuit and four passes.

FIG. 9 is a vertical sectional side view of a temperature controller used in a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional plan view of a temperature controller used in the fourth embodiment of the present invention.

FIG. 11 is a vertical sectional side view of a temperature control unit used in a fifth embodiment of the present invention.

FIG. 12 is a cross-sectional plan view of a temperature controller used in a fifth embodiment of the present invention.

FIG. 13 is an explanatory diagram of a flow passage of a fluid to be heated of a tubular heat exchanger for two circuits and two passes.

FIG. 14 is a side view showing an installation example of a tube heat exchanger with a temperature controller according to a fifth embodiment of the present invention.

FIG. 15 is a front view of FIG.

FIG. 16 is a vertical sectional side view of a temperature control unit used in a sixth embodiment of the present invention.

FIG. 17 is a cross-sectional plan view of a temperature controller used in the sixth embodiment of the present invention.

FIG. 18 is a vertical sectional side view of a conventional tubular heat exchanger.

FIG. 19 shows an example of installation of a conventional tubular heat exchanger.

FIG. 20 is an explanatory diagram of a conventional temperature control method using a bypass flow.

FIG. 21 is an explanatory diagram showing another example of a conventional temperature control method using a bypass flow.

[Explanation of symbols]

1 is a heat transfer tube, 2 is a body, 2a is an inlet nozzle, 2b is an outlet nozzle, 2c is a flange, 3 is a partition plate, 4 is a header, 4
a is a flange, 5a is an inlet pipe, 5b is an outlet pipe, 6a is a fluid, 6b is a fluid, 6c is a bypass fluid, 7 is a heating fluid,
8 is a tube plate, 10 is a temperature detector, 11 is a temperature controller, 16
Is a temperature control unit, 17 is a control motor, 18 is an arm linkage, 19 is a valve rod, 20 is a short pipe, 20a is a flange, 2
1 is a flow path partition wall, 21a is a horizontal part, 21b is a vertical part, 2
2 is a fluid passage, 23 is a valve body, 24 is a bush, 25 is a bearing mechanism, 26 is a control valve mechanism, 26a is a first circuit control valve mechanism, and 26b is a second circuit control valve mechanism.

Claims (5)

[Claims] 1. A fluid flowing into the heat transfer tube (1) side between a body section (2) provided with the heat transfer tube (1) and a header section (4) provided with a flow path partition plate (3). Inside the fluid (6b) flowing out from the heat transfer tube (1) side, which is provided with a temperature control section (16) having a control valve mechanism (26) for adjusting the bypass flow rate to the heat transfer tube (1) side of (6a). A pipe type heat exchanger with a temperature control device, wherein the temperature of the fluid flowing out from the header portion (4) is controlled by mixing the bypass fluid (6c) into the heat exchanger. 2. A temperature control section (16) comprising a short pipe (20),
A flow path partition wall (2) having substantially the same cross-sectional shape as the flow path partition wall (21) of the header portion (4) and having a fluid passage (22) for the bypass fluid (6c) for the heat transfer tube (1) side formed therein.
1) and a valve body (2) for adjusting the cross-sectional area of the fluid passageway (22).
The pipe heat exchanger with a temperature control device according to claim 1, comprising a control valve mechanism (26) having a valve stem (19) for driving the valve body (23). 3. The tubular heat exchanger with a temperature controller according to claim 2, wherein the valve body (23) is a plate-shaped valve body or a plug-shaped valve body. 4. The pipe type heat exchange with temperature control device according to claim 2, wherein the fluid passage (22) has a semicircular shape, and the valve body (23) is a semicircular plate valve body. vessel. 5. The pipe type with temperature control device according to claim 2, wherein the shape of the fluid passage (22) is a quarter circle, and the valve body (23) is a plate valve body of a quarter circle. Heat exchanger.