KR102475164B1 - Finless type shell and double tube heat exchanger with electric heating device - Google Patents

Abstract

The present invention (design) relates to the manufacture of a multi-tube multi-tube heat exchanger using an electric heating device, and more specifically, an electric heater is inserted into an inner pipe using a separated double-tube heating surface of the heat exchanger and a heat source (liquid or gas) heats the heat transfer surface of the outer pipe, the heat medium flowing between the outer pipe and the inner pipe is heated, and at this time, the temperature of the heat medium heated by the heat source (gas, liquid) is sent to the electric device that controls the heater 160 It relates to a finless type multi-tubular heat exchanger having an electric heating device that improves the efficiency of a heat exchanger in which a heat medium is heated to a use temperature by controlling the temperature of a heater 160.

Description

Finless type multi-tube double tube heat exchanger with electric heating device {omitted}

The present invention (design) relates to the manufacture of a complex heating finless type multi-tube double-tube heat exchanger using an electric heating device, and more specifically, an electric heater is inserted into the inner pipe using the separated double-tube heat transfer surface of the heat exchanger When a heat source (liquid or gas) heats the heat transfer surface of the outer pipe, the heat medium flowing between the outer pipe and the inner pipe is heated, and according to the temperature of the heat medium, the inner pipe electric heater simultaneously heats it to raise the temperature of the heat medium to improve thermal efficiency. It relates to a finless type multi-tubular heat exchanger provided with a heating device.

In general, heat exchangers are limited in the number of heat exchange tubes that can be installed in the case of tubes for heat exchange arranged inside a certain space, so the heating effect by heat exchange is limited, so there is a limit to increasing the heat exchange effect. Since the space occupied by these facilities, as well as the increase in equipment costs due to heating, must be secured, problems arise in the efficient use of space.

Therefore, the present applicant also proposed a finless type double tube heat exchanger and a boiler finless type multi-tube heat exchanger No. 10-1672278.

However, although the space and heat transfer effect could be increased through the above invention, the problem of heating in multiple stages could not be completely solved because an additional heat source could not be supplied.

The present invention (design) is an invention devised to solve the conventional problems as above, and relates to the manufacture of a finless type multi-tubular heat exchanger equipped with an electric heating device, and more specifically, the inner space in which the space of the heat exchanger is separated. The double tube structure of the pipe and the outer pipe is made, and the electric heater, which is the secondary heat source, is placed in the inner pipe, and the heat medium flows between the inner and outer pipes. It was heated simultaneously with a heater.

Therefore, it is an object of the present invention to provide a finless type multi-tubular heat exchanger equipped with an electric heating device capable of using a heat source that is a problem due to a low heating temperature.

The present invention for achieving the above object is a first chamber 110 that is connected to a heat medium (gas, liquid) pipe, receives a heat medium from the low temperature fluid inlet 111, and discharges the heated heat medium through the low temperature fluid outlet 112 , a partition wall 115 separating and partitioning the low-temperature fluid inlet 111 side and the low-temperature fluid outlet 112 side of the first chamber 110, one end of the first chamber 110 at both sides of the partition wall 115 It includes a plurality of outer pipes 150 through-connected to the outside of the inner wall 117 of ), and a second chamber 120 through-connected to the other end of the plurality of outer pipes 150.
In addition, according to the present invention, an electric heater 160 for heating a heating medium is inserted into the hollow, each inserted into the hollow of the plurality of outer pipes 150, and one end portion of the outer wall 118 of the first chamber 110 and the other end extends to the second chamber 120 to form a heat medium passage between the outer pipe 150 and the heat medium between the first chamber 110 and the second chamber 120. A plurality of inner pipes 140 to flow, and a first assembly 161 that is fixed to one end of the outer circumferential surface of the inner pipe 140 and mediates the coupling between the inner pipe 140 and the outer wall of the first chamber 110 ), a second assembly 162 fixed to the outer wall 118 of the first chamber 110 and wrapped around the outer circumferential surface of the first assembly 161, and a second assembly 162 for accommodating the electric heater 160 at the top. An electric heater compartment 130 is included.
In the present invention, when the heat medium flows between the first chamber 110 and the second chamber 120, the primary heat source introduced through the high-temperature heat source inlet 171 flows to the high-temperature heat source outlet 172 while the plurality of Heat is exchanged with the outer pipe 150, and the heat medium is firstly heated, and at the same time, the electric heater 160, which is a secondary heat source built into the plurality of inner pipes 140, heats the heat medium secondarily to bring the heat medium to the operating temperature. At this time, the temperature value of the heating medium primarily heated by the primary heat source is sent to an electrical device that controls the electric heater 160 to control the temperature of the electric heater 160 to heat the heating medium to a use temperature, Further comprising a baffle 173 partitioning a heat source flow space S accommodating a plurality of outer pipes 150 exposed between the first chamber 110 and the second chamber 120 in a zigzag form, , The baffle 173 has one end fixed to the inner surface of the housing 101 on the side of the low-temperature fluid inlet 111 and the other end installed on the outer circumferential surface of the outer pipe 150 installed on the side of the low-temperature fluid outlet 112. A first baffle ( 173a) and a second baffle 173b, one end of which is fixed to the inner surface of the housing 101 on the side of the low-temperature fluid outlet 112 and the other end of which is installed on the outer circumferential surface of the outer pipe 150 installed on the side of the low-temperature fluid inlet 111. The first baffle 173a and the second baffle 173b are alternately installed to partition the heat source flow space S in a zigzag shape, and the low-temperature fluid inlet 111 of the first chamber 110 - > The second chamber 120 -> When flowing along the U-shaped path of the low-temperature fluid outlet 112, the primary flowed in along the zigzag shape of the external flow path 170 formed by the baffle 173 The heat source flows sequentially and heat is exchanged.

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The coupling between the outer circumferential surface of the first assembly 161 and the inner circumferential surface of the second assembly 162 is by screw coupling, and partition walls 115 dividing the space of the first chamber 110 into a plurality of spaces are formed so that the heating medium sequentially flows between the first chamber, the heating medium passage, and the second chamber 120,

The primary heat exchange is performed through the outer pipe in which the exterior flow path portion 170 is formed, and at this time, the temperature of the heating medium heated primarily by the heat source (gas, liquid) is sent to the electrical device that controls the heater 160, and the heater 160 ) by controlling the temperature of the heat medium to heat the secondary heat exchange.

The present invention (design) as described above is an invention devised to solve the conventional problems as described above. The heat medium flows between the inner pipe and the outer pipe, and is first heated with the first heat source (gas, liquid) through the outer pipe, and the insufficient heat is secondarily heated with the second heat source, the electric heater. It is a very economical and useful invention by providing a finless type shell-and-tubular heat exchanger equipped with an electric heating device that is convenient and reduces equipment costs by increasing the heating effect in various heat exchangers required for this.

1. A side view of a finless type multi-tubular heat exchanger having an electric heating device according to an embodiment of the present invention;
Figure 2. A cross-sectional view showing the side of a finless type multi-tubular heat exchanger having an electric heating device according to an embodiment of the present invention;
Figure 3. A cross-sectional view showing the detailed structure of a finless type multi-tubular heat exchanger having an electric heating device according to an embodiment of the present invention;
4. is a cross-sectional view showing a heat medium circulation structure of a finless type multi-tubular heat exchanger having an electric heating device according to another embodiment of the present invention;

Hereinafter, a finless type multi-tubular heat exchanger equipped with an electric heating device according to the present invention will be described in more detail with reference to the drawings.

Prior to a more detailed description of the high-temperature regenerator of the combined absorption type electric heater combined with waste heat recovery of the present invention,

Since the present invention can have various changes and various forms, the implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numeral, in particular, the same number of tens and ones digits, or the same reference numerals having the same tens digit, ones digit, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings Members indicated by reference numerals may be understood as members conforming to these standards.

In addition, the components in each drawing are expressed in exaggeratedly large (or thick) small (or thin) or simplified expressions in size or thickness in consideration of convenience of understanding, etc., but the scope of protection of the present invention is thereby limited. It shouldn't be.

Terms used in this specification are only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and are not intended to limit the present invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~comprising~ or ~consisting of are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

As shown in FIG. 2, the finless type multi-tubular heat exchanger equipped with an electric heating device is connected to a heat medium (gas, liquid) pipe, receives heat medium from the low temperature fluid inlet 111, and warms through the low temperature fluid outlet 112. A first chamber 110 through which heat medium is discharged: a plurality of outer pipes 150 through-connected to the outside of the inner wall of the first chamber 110 and a second chamber through-connected to the ends of the plurality of outer pipes 150 ( 120): A heater 160 for heating a heat medium is inserted into the hollow, one end is penetrated through the outer wall of the first chamber 110 and the other end extends to the second chamber 120 to form the outer pipe ( 150) to form a heat medium flow path between the first chamber 110 and the second chamber 120, a plurality of inner pipes 140 that allow the heat medium to flow, fixed to one end of the inner pipe 140 The first assembly 161 mediating the coupling between the inner pipe 140 and the outer wall of the first chamber 110, and the first assembly 161 fixed to the outer wall of the first chamber 110 A plurality of outer pipes 150 exposed between the first chamber 110 and the second chamber 120 of the heat exchanger 100 composed of a second assembly 162 for wrapping and coupling the outer circumferential surface of the and an electric heater compartment 130 accommodating the electric heater 160 at the upper end, and the outer circumferential surface of the first assembly 161 and the inner circumferential surface of the second assembly 162 are coupled by screw coupling, When the heat medium flows between the first chamber 110 and the second chamber 120, the heat source (gas, liquid) introduced through the heat source (gas, liquid) inlet 171 flows to the outlet 172 while the plurality of Heat exchange with the outer pipe 150 of the heat medium is heated, and at the same time, the heater 160 built in the plurality of inner pipes 140 heats the heat medium to raise the heat medium to the operating temperature. At this time, the temperature of the heat medium heated by the heat source (gas, liquid) is sent to the electric device that controls the heater 160 to control the temperature of the heater 160 to heat the heat medium to a use temperature.

The second assembly 162 has an inner circumferential cross section of a first region having a first diameter so as to surround the outer circumferential surface of the first assembly 161, extending from the first region and limiting the movement of the first assembly 161. A cross section of the inner circumferential surface has a second diameter smaller than the first diameter, and a second region to which the first assembly 161 is connected is formed at an end.

In addition, the second area includes a sealing portion provided in the insertion space so as to be located between the inner end of the first assembly 161 and the end of the second assembly 162 facing each other in a straight line direction, and one or more O-rings or One or more gaskets are inserted.

The first assembly 161 of the inner pipe 140 penetrated through the second assembly 162 attached to the outer wall of the first chamber 110 from the outside of the first chamber 110 through the screw thread formed on both sides. By rotating the inner pipe 140 in close contact with the bolt or nut for coupling, pressure is applied to the binding ends of the coupling bodies 161 and 162, so that the O-ring or gasket in the sealing portion. By being compressed, binding and sealing of the connection part of the inner pipe 140 connected to the first chamber 110 are simultaneously performed.

In addition, a heat exchanger body surrounding outer circumferential surfaces of the plurality of outer pipes 150 exposed between the first chamber 110 and the second chamber 120 is included, and the heat exchanger body includes the upper first chamber 110 ), a lower second chamber 120, and an electric heater compartment 130 therein.

The heater 150 heats the plurality of outer pipes 1150 while a heat source (gas or liquid) is introduced through the inlet 171 and flows to the outlet 172, and at the same time the plurality of inner pipes 140 The heater 160 heats the heating medium to raise the heating medium use temperature. At this time, the temperature of the heating medium primarily heated by the primary heat source is sent to the electrical device that controls the heater 160 to control the temperature of the heater so as to heat the heating medium to a use temperature secondarily.

2 to 4 are examples related to the present invention, which accommodate a plurality of external pipes exposed between the first chamber 110 and the second chamber 120 of the heat exchanger 100 so that the primary heat source is When a flowing flow path is formed, the heat source (gas or liquid) introduced by placing the baffle 173 in the flow path exchanges heat along the flow path formed by the baffle 173 and is discharged through the outlet 172 connected to one side.

Between the first assembly 161 coupled to the plurality of inner pipes 140 and the first chamber 110, and the second assembly 162 coupled to the outer wall through welding are connected.

In the assembly method for achieving the object of the present invention, a plurality of outer pipes 150 communicating between the first chamber 110 and the second chamber 120 are connected to the first chamber 110 and the second chamber 120. 2 fixing by welding for penetrating coupling to the inner wall of the chamber 120, welding and fixing the first assembly 161 to one end of the inner pipe 140 equipped with the electric heater 160, Through-welding one end of the second assembly 162 screwed to the outer circumferential surface of the first assembly 161 to the outer wall of the first chamber 110, the inner pipe 140 is connected to the second assembly ( 162) and the first chamber 110, inserting into the outer pipe 150 and coupling between the second assembly 162 and the first assembly 161 with screws, and the first chamber 110 ) And the heat source flow space (S) accommodating the plurality of outer pipes 150 exposed between the second chamber 120 is partitioned in a zigzag shape to form the exterior flow path portion 170. and accommodating it inside the heat exchanger (100).

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In the above description of the present invention, a finless type multi-tubular heat exchanger having an electric heating device having a specific shape and structure has been described with reference to the accompanying drawings, but the present invention is capable of various modifications and changes by those skilled in the art, However, such modifications and changes should be construed as belonging to the protection scope of the present invention.

<Name of symbols for main parts of drawings>
100: heat exchanger
110: first chamber 111: low-temperature fluid inlet 112: low-temperature fluid outlet 115: bulkhead
120; second chamber
130: electric heater compartment
140: inner pipe
150: outer pipe
160: electric heater 161: first assembly 162: second assembly
170: exterior flow path 171: high-temperature heat source inlet 172: high-temperature heat source outlet
173 baffle

Claims (3)

A first chamber 110 connected to a heating medium (gas, liquid) pipe, receiving a heating medium to be heated from the low temperature fluid inlet 111 and discharging the heated heating medium through the low temperature fluid outlet 112;
a partition wall 115 separating and partitioning the low-temperature fluid inlet 111 side and the low-temperature fluid outlet 112 side of the first chamber 110;
a plurality of outer pipes 150 having one ends penetrated and connected to the outside of the inner wall 117 of the first chamber 110 from both sides of the partition wall 115;
a second chamber 120 penetrated and connected to the other end of the plurality of outer pipes 150;
An electric heater 160 for heating the heat medium is inserted into the hollow, each inserted into the hollow of the plurality of outer pipes 150, and one end is penetrated and coupled to the outer wall 118 of the first chamber 110 and the other An end portion extends to the second chamber 120 to form a heat medium passage between the outer pipe 150 and a plurality of heat medium flow between the first chamber 110 and the second chamber 120. inner pipe 140;
a first assembly 161 that is fixed to one outer circumferential surface of the inner pipe 140 and mediates the coupling between the inner pipe 140 and the outer wall of the first chamber 110;
a second assembly 162 fixed to the outer wall 118 of the first chamber 110 and wrapped around an outer circumferential surface of the first assembly 161; and
An electric heater compartment 130 for accommodating an electric heater 160 at the top;
including,
The coupling between the outer circumferential surface of the first assembly 161 and the inner circumferential surface of the second assembly 162 is by screw coupling,
When the heat medium flows between the first chamber 110 and the second chamber 120, the primary heat source introduced through the high-temperature heat source inlet 171 flows to the high-temperature heat source outlet 172 while the plurality of outer pipes ( 150) and the heat medium is heated first, and at the same time, the electric heater 160, which is a secondary heat source built into the plurality of inner pipes 140, heats the heat medium secondarily to raise the heat medium to the operating temperature,
At this time, the temperature value of the heating medium primarily heated by the primary heat source is sent to the electric device that controls the electric heater 160 to control the temperature of the electric heater 160 to heat the heating medium to the operating temperature secondarily,
Further comprising a baffle 173 partitioning a heat source flow space S accommodating a plurality of outer pipes 150 exposed between the first chamber 110 and the second chamber 120 in a zigzag form, ,
The baffle 173 has one end fixed to the inner surface of the housing 101 on the side of the low-temperature fluid inlet 111 and the other end of the first baffle 173a installed on the outer circumferential surface of the outer pipe 150 installed on the side of the low-temperature fluid outlet 112. ) and a second baffle 173b installed on the outer circumference of the outer pipe 150, one end of which is fixed to the inner surface of the housing 101 on the side of the low-temperature fluid outlet 112 and the other end of which is installed on the side of the low-temperature fluid inlet 111. , the first baffle 173a and the second baffle 173b are alternately installed to partition the heat source flow space S in a zigzag shape,
When the heat medium to be heated flows along a U-shaped path from the low-temperature fluid inlet 111 of the first chamber 110 -> the second chamber 120 -> the low-temperature fluid outlet 112, the baffle 173 ) A finless type shell-and-tube heat exchanger having an armature heating device, characterized in that the primary heat source introduced along the zigzag-shaped external flow path portion 170 is sequentially flowed and heat exchanged. A method for manufacturing a finless type multi-tubular heat exchanger having the electric heating device of claim 1,
Welding for penetrating and coupling a plurality of outer pipes 150 communicating between the first chamber 110 and the second chamber 120 to the inner walls of the first chamber 110 and the second chamber 120 fixing with;
welding and fixing the first assembly 161 to one end of the inner pipe 140 equipped with the electric heater 160;
through-welding one end of the second assembly 162 screwed to the outer circumferential surface of the first assembly 161 to the outer wall of the first chamber 110;
The inner pipe 140 is inserted into the outer pipe 150 through the second assembly 162 and the first chamber 110 and passes between the second assembly 162 and the first assembly 161. screwing together; and
The exterior flow passage part 170 is formed by partitioning the heat source flow space S accommodating the plurality of external pipes 150 exposed between the first chamber 110 and the second chamber 120 in a zigzag shape. accommodating the baffle 173 inside the heat exchanger 100 so as to;
Method for manufacturing a finless type multi-tubular heat exchanger having an electric heating device comprising a. delete

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