KR102097399B1 - Plate Tpye Heat Exchanger - Google Patents

Abstract

The present invention relates to a plate-type heat exchanger capable of preventing acid dew points. The plate-type heat exchanger comprises: a first and a second heat transfer plate having a first flange surface bent to one side on the edge of one side of a heat transfer surface of a rectangular plate shape, and a second flange surface bent to the other side on the edge of the other side of the heat transfer surface adjacent to one end of the first flange surface; a heat transfer shell in which the first flange surface of the first and second heat transfer plates and an outer edge of a heat transfer surface of a different heat transfer plate come in contact with each other to be integrally welded, and the second flange surface of the first and second heat transfer plates and a different outer edge of the heat transfer surface of the different heat transfer plate come in contact with each other to be integrally welded to form an internal passage between the first and second heat transfer plates; a heat transfer assembly forming a second fluid passage perpendicularly crossing a first fluid passage formed by the internal passage between a plurality of heat transfer shells by stacking the heat transfer shells in multiple layers; a frame unit having a plurality of support beams connecting a pair of sealing panels facing the outer surface of both sides of the heat transfer assembly; and a rectification plate forming a plurality of rectification holes of which inner diameters become smaller in a self-weight direction through a lower area of an inlet of the second fluid passage of the heat transfer assembly connected to a duct for low-temperature gas supply for supplying low-temperature gas to form an upper rectification area through which the low-temperature gas passes and a lower blocking area for blocking the supply of the low-temperature gas.

Description

Plate heat exchanger {Plate Tpye Heat Exchanger}

The present invention relates to a plate-type heat exchanger, and more specifically, a high temperature having the lowest temperature in the process of heat exchange while passing the first fluid passage and the second fluid passage of the plate heat exchanger without physical contact between the high-temperature gas and the low-temperature gas. The present invention relates to a plate heat exchanger that can prevent the occurrence of acid dew point, which frequently occurs in the lower portion of the exit side of the high temperature gas and the lower side of the entry side of the low temperature gas during heat exchange between the gas and the low temperature gas having the lowest temperature.

In general, the heat exchanger is to recover heat contained in the exhaust gas exhausted to the outside from industrial facilities and air conditioning facilities to recover heat through a fluid-to-fluid method supplied to a production facility or a room.

The heat exchanger is classified into a plate heat exchanger, a heat pipe type heat exchanger, and a disk type heat exchanger according to the shape of a heat exchange module, which is a core part provided therein.

That is, the plate-type heat exchanger is such that heat transfer (heat exchange) is performed without physical contact with each other between a high-temperature gas such as waste heat and a low-temperature gas as a gas in the atmosphere.

These plate heat exchangers are arranged by overlapping a plurality of heat transfer plates having a plate shape at a predetermined interval in parallel with each other, and each flow path is a flow path in which fluid flows in one direction, and each flow path alternates hot and low temperature gases for each heat transfer plate. Heat is recovered through heat exchange (heat transfer) through each heat transfer plate by supplying to.

On the other hand, in a heat exchange device such as a plate heat exchanger, one of design conditions that must be considered variously in designing a device relates to the safety of the device against corrosion.

For example, in a device in which heat exchange is performed, the temperature drops by contact of both fluids separated from each other, and the surface temperature decreases to an acid dew point or a lower dew point, which inevitably causes condensation. As this occurs, corrosion may proceed in certain areas.

That is, in the fluid for performing heat exchange, in the gas group, sulfur dioxide (SO ₂ ) and a large amount of harmful gases that cause corrosion are mixed, and these corrosive substances are accommodated in dew to promote corrosion.

This corrosive substance stops the heat exchange and adheres to the spot as the dew evaporates, causing continuous corrosion in certain parts, for example, in the case of a plate heat exchanger, the heat exchanger, etc. Ordered.

For this reason, the maintenance management of the heat exchanger must be frequently performed, and even if the actual maintenance is performed, there is an inevitable problem of replacing the parts with corrosion.

In this way, the conventional heat exchange device frequently undergoes corrosion in a specific area exposed to the acid dew point depending on the temperature drop, so the replacement cycle for parts located in the corresponding area is frequent. This may lead to a decrease in the durability of the device and a shortening of the life of the device, and consequently, the operating cost of the device must be increased.

(Patent Document 1) KR10-2019-0004556 A

Patent Document 1, a pair of heat transfer plates are attached to a pair in which a first flow path is formed therein, and two or more are assembled at a predetermined separation distance, and the core includes a second flow path formed between the pair and the pair, In the plate heat exchanger in which the first fluid and the second fluid passing through the first flow path and the second flow path are orthogonal to each other, the second flow path is attached to both side heat transfer plates of adjacent pairs. By constructing the hot plate, the hot gas passing through the plate heat exchanger and the low temperature air cross each other to form a heat shield layer at a specific portion having low temperature characteristics to minimize temperature degradation, thereby generating an acid dew point. Disclosed is a plate heat exchanger having a function of preventing dew point.

However, in order to prevent the occurrence of acid dew point in Patent Literature 1, the work process of integrally attaching the heat shield plates to both sides of the pair is to be integrally attached to the heat shield plates on both sides of the pair. It is very demanding and there is a risk of dropout when used for a long time, and it has been a major cause of increasing manufacturing cost.

Therefore, the present invention is to solve the problems as described above, the purpose of which is that the high-temperature gas and the low-temperature gas heat exchange while passing through the first fluid passage and the second fluid passage of the plate heat exchanger without physical contact with each other. During the heat exchange between the high temperature gas having the lowest temperature and the low temperature gas having the lowest temperature in the process, a plate shape that can prevent the occurrence of acid dew point, which frequently occurs in the lower part of the exit side of the high temperature gas and the lower part of the entry side of the low temperature gas, It is intended to provide a heat exchanger.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

As a specific means for achieving the above object, a preferred embodiment of the present invention, the first flank to be bent to one side of one edge of the heat transfer surface of a rectangular plate, and the front adjacent to one end of the first flank A first and second heat transfer plate having a second flange surface bent to the other side of the other side of the heat surface; The first flange surface of the first and second heat transfer plates and the outer edges of the heat transfer surfaces of the other heat transfer plates facing each other are spaced apart from each other to form an inlet portion and an outlet portion, and a second of the one heat transfer plate of the first and second heat transfer plates A heat transfer shell in which the flange surface and the other outer border of the heat transfer surface of the other heat transfer plate facing the same are welded integrally to form an internal passage between the first heat transfer plate and the second heat transfer plate; An electrothermal assembly in which the heat transfer shells are stacked in a multi-layer to form a second fluid passage that intersects at a right angle with the first fluid passage formed by the internal passage for each of the plurality of heat exchange shells; A frame part having a plurality of support beams connecting between a pair of sealed panels facing the outer surfaces of both sides of the heating assembly; And a plurality of rectifying holes having a smaller inner diameter size penetrating toward the lower area of the entrance of the second fluid passage of the heat transfer assembly connected to the duct for supplying the low-temperature gas to the low-temperature gas supply, thereby allowing the low-temperature gas to pass therethrough. A rectifying plate forming an upper rectifying region and a lower blocking region blocking the supply of the low-temperature gas; It provides a plate heat exchanger characterized in that it comprises a.

At this time, the upper rectifying region is a first rectifying region having a plurality of first rectifying holes having a predetermined size penetrating, and a second rectifying having a plurality of second rectifying holes having an inner diameter size smaller than the inner diameter of the first rectifying hole. And a third rectifying region formed by penetrating a plurality of regions and a third rectifying hole having an inner diameter smaller than the inner diameter of the second rectifying hole.

At this time, the rectifying plate may be fixedly installed in the heat transfer assembly corresponding to the lower area of the inlet of the second fluid passage.

At this time, the rectifying plate may be fixedly installed in the lower portion of the outlet side of the low-temperature gas supply duct in communication with the inlet of the second fluid passage of the heat transfer assembly.

At this time, the outlet end of the low-temperature gas supply duct may include a plurality of laminar flow plates to form first, second and third laminar flow regions corresponding to the first, second and third rectification regions formed on the rectifying plate. .

At this time, the rectifying plate is provided with a pair of hinge shafts, which are rotatably assembled to a pair of hinge holes, respectively formed at the bottom of both inner sides of the inner side of the duct for supplying the low-temperature gas, on both sides of the lower side, and on both inner sides of the duct for supplying the low-temperature gas. A guide jaw guided along the arc-shaped guide groove formed in the upper side may be provided to be rotatable.

At this time, the rectifying plate is provided with a pair of hinge shafts that are rotatably assembled in a pair of hinge grooves recessed at the bottom of both inner sides of the inner side of the duct for supplying the low-temperature gas to both side ends of the lower side, and the inner both side surfaces of the duct for supplying the low-temperature gas It may include a guide member that is guided along the arc-shaped guide groove formed at both upper ends, and a magnet member that generates a magnetic force by applying a magnetic force to the pizza seat member provided at both sides.

According to a preferred embodiment of the present invention as described above has the following effects.

When the high temperature gas and the low temperature gas passing through the plate heat exchanger cross each other, a plurality of commutation holes having a smaller inner diameter are formed toward the outlet side of the first fluid passage at the lower part of the inlet side where the low temperature gas is supplied at a specific site having the characteristics of the low temperature part. By providing one rectifying plate, the supply amount of the low-temperature gas supplied to the inlet side of the second fluid passage corresponding to the outlet side of the first fluid passage corresponding to the rectifying plate decreases the supply amount toward the outlet side of the first fluid passage to reduce the first Since the temperature drop of the high-temperature gas can be minimized at the outlet side of the fluid passage, it is possible to prevent the occurrence of an acid dew point, thereby extending the service life of the plate heat exchanger, and maintenance costs due to corrosion Can be reduced.

1 is an overall perspective view showing a plate heat exchanger according to an embodiment of the present invention.
2 is an exploded perspective view showing a plate heat exchanger according to an embodiment of the present invention.
Figure 3 shows a heat transfer shell applied to the plate-type heat exchanger according to an embodiment of the present invention,
a) is an overall perspective view,
b) is a cross-sectional view taken along line AA,
c) is a cross-sectional view taken along line BB. .
4 is a perspective view showing a rectifying plate applied to a plate type heat exchanger according to an embodiment of the present invention
5A, 5B, and 5C are configuration views of a rectifying plate applied to a plate heat exchanger according to an embodiment of the present invention installed in a duct for supplying low-temperature gas.
6A to 6F are process diagrams for manufacturing a heat transfer shell applied to a plate heat exchanger according to an embodiment of the present invention.
7 is a graph showing a correlation between a temperature change of a high temperature gas and a supply amount of a low temperature gas in a plate type heat exchanger according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments that can be easily carried out by the person of ordinary skill in the art. However, in the detailed description of the structural principle of the preferred embodiment of the present invention, when it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

In addition, the same reference numerals are used for parts having similar functions and functions throughout the drawings.

In addition, throughout the specification, when a part is said to be 'connected' to another part, it is not only 'directly connected', but also 'indirectly connected' with another element in between. Includes. Also, 'including' a component means that other components may be included, not excluded, unless otherwise stated.

1 is an overall perspective view showing a plate heat exchanger according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a plate heat exchanger according to an embodiment of the present invention, and FIG. 3 is a plate heat exchanger according to an embodiment of the present invention Shown as a heat transfer shell employed in the group, a) is an overall perspective view, b) is a cross-sectional view taken along line AA, and c) is a cross-sectional view taken along line BB.

Plate-type heat exchanger 200 according to an embodiment of the present invention, as shown in Figures 1, 2 and 3a to 3c, a heat transfer shell 130 consisting of a pair of heat transfer plates (110 120), a plurality of heat transfer shell It includes a hexahedral heating assembly 100 made of 130, the frame portion 140 and the rectifying plate 150.

In FIG. 1, the first fluid passage (F1) is supplied with high-temperature gas, such as high-temperature exhaust gas and waste heat, discharged from the industrial site from the top, and passes through the heat transfer assembly (100) vertically, thereby exchanging heat with the low-temperature gas to lose heat. It is assumed that it is discharged downward through the internal passage provided in the heat transfer shell 130, and the second fluid passage F2 is supplied with low-temperature gas such as air in low-temperature atmosphere from the left side in the drawing, so that the heat-transfer assembly 100 is provided. While passing through horizontally and heat-exchanging with a high-temperature gas to obtain heat, it is discharged to the right through an external passage formed between the heat transfer shell 130 and other heat transfer shells 130 stacked thereon, but is not limited thereto. The gas and the low-temperature gas may be supplied opposite to each other to pass through the inner and outer passages of the heat transfer assembly.

The heat transfer shell 130, as shown in Figures 6a to 6f, the first heat transfer surface (111,121) made of a substantially rectangular plate shape, and the first flange surface (112, 122) bent outwardly from the upper or lower edge in the drawing , First and second heat transfer plates (110, 120) forming second flange surfaces (114, 124) that are bent outward from one side of one of the two side edges of the heat transfer surfaces (111, 121) corresponding to one end of the first flange surface.

The heat transfer shell 130 is formed by a combination of the first heat transfer plate and the second heat transfer plate, and the upper first flange surface 112 of the first heat transfer plate 110 of the first and second heat transfer plates 110 and 120 Is spaced apart at a predetermined distance from the lower edge of the second heat exchanger plate 120 corresponding to this to form an inlet, and the first first flange surface 122 of the second heat exchanger plate 120 corresponds to the first heat exchanger plate 110 ) Spaced apart from the lower edge of the lower edge to form an outlet portion communicating with the inlet portion.

At the same time, the left second flange surface 114 of one of the first and second heat transfer plates 110 and 120 contacts the left edge of the corresponding second heat transfer plate to form a welding sealing line to be welded. , The second flange surface 124 on the right side of the second heat transfer plate 120 forms another welding sealing line that is welded in contact with the right edge of the first heat transfer plate.

Accordingly, in the first and second heat transfer plates, an inner passage parallel to the welding sealing line is formed between the heat transfer surfaces 111 and 121 facing each other, and at the same time, the inlet and outlet portions of the inner passage are upper and lower sides of the heat transfer shell in the drawing. Is formed on.

Here, the first and second flange surfaces 112 and 122 and the second and second flange surfaces 114 and 124 respectively formed on the first and second heat transfer plates are bent to protrude in opposite directions based on the heat transfer surfaces 111 and 121.

And, between the first flange surface (112,122) and the heat transfer surface (111,121) forms an inclined surface that is bent and formed at a certain angle toward the inlet and outlet side of the inner passage, the second flange surface (114,124) And between the heat transfer surface (111,121) to form a different inclined surface is formed to bend at a certain angle inclined toward the direction perpendicular to the welding sealing line.

At this time, the welding sealing line is formed by deep welding the contact portions between the first and second flange surfaces 112, 114, 122, 124 of the heat exchanger plates 110 and 120 facing each other and the edges of the heat exchanger plates corresponding to each other. The part and the outlet part are formed by the first flanks 112 and 122 that open outward.

1 and 2, the heat transfer assembly 100 is formed by stacking a plurality of heat transfer shells 130, which are one unit member, manufactured by bonding a pair of heat exchange plates 110 and 120 facing each other to each other in multiple layers. It is a hexahedral rigid structure.

The heat transfer assembly 100 forms a passage of a certain size so that the fluid can pass freely between the heat transfer shell 130 and other heat transfer shells 130 adjacent to each other, so that low-temperature gas is supplied to one side and the other side. A second fluid passage F2 that can pass through is formed.

Here, the second fluid passage (F2) is formed by the respective internal passages of the plurality of heat transfer shells (130) so that the hot gas is supplied to one side and crosses the first fluid passage (F1) perpendicular to the other side. Since the low-temperature gas passing through it passes through the heat transfer assembly 100 without mixing with the high-temperature gas, the high-temperature gas and the low-temperature gas having different temperatures can be exchanged with each other.

That is, when the heat transfer shell 130 forming a welding sealing line is laminated between the second flange surfaces 114 and 124 of the first and second heat transfer plates and the heat transfer surfaces of the first and second heat transfer plates corresponding to the heat transfer shells 130, the heat transfer is performed. Each of the first and second heat transfer plates 112 and 122 of the first and second heat transfer plates forming the inlet and outlet portions of the inner passage of the shell 130 does not form a first flan surface in other heat transfer shells 130 that are adjacently stacked. While being welded integrally in an interview with the outer edge of the heat surface, each of the second flange surfaces 114 and 124 of the first and second heat transfer plates parallel to the welding sealing line is first and second of the other heat transfer shell 130 stacked adjacently. Each of the second flange surfaces 114 and 124 of the heat transfer plate is spaced apart from each other.

In addition, between the left and right ends of each of the first and second heat transfer plates of the first and second heat transfer plates and the outer edges of the respective heat transfer plates of the first and second heat transfer plates corresponding to the first and second heat transfer plates, welding sealing lines are formed on both sides of the heat transfer shell. Each end plate 135 is formed in contact with and forms an inlet and an outlet.

A plurality of first spacing holding members 115 in contact with the heat transfer surfaces of the second heat transfer plates of adjacent heat transfer shells when stacked with other heat transfer shells adjacent to the heat transfer surface 111 of the first heat transfer plate 110 By fixedly installing, it is possible to maintain a constant distance between the second fluid passages F2 through which the low-temperature gas passes while maintaining the distance between the heat transfer shells stacked adjacent to each other by the plurality of first interval holding members 115. .

In addition, the plurality of second spacings are maintained by fixing a plurality of second spacing holding members 125 in contact with the heat transfer surfaces of the adjacent first heat transfer plates and the end portions of the second heat transfer plates 120. The spacing of the first fluid passage F1 through which the high-temperature gas passes can be kept constant while maintaining the interval of the internal passage formed in the heat transfer shell that is in contact with and joined to each other by the member 125.

1 and 2, the frame part 140 is provided with a pair of sealing panels 141 and 142 disposed to face each other on both outer surfaces of the heat transfer assembly 100, and a plurality of connecting between them. It includes upper and lower support beams 143 and 144.

The pair of sealing panels 141 and 142 include a sealing plate on a square plate facing both outer surfaces of the heat transfer assembly 100 and a lattice-type reinforcement plate provided on the outer surface of the sealing plate, Each corner is fastened as a fastening member with both ends of the upper and lower support beams 143 and 144.

Here, each inner surface of the sealing plate facing the heat transfer assembly 100 may be provided with a glass coating layer of a predetermined thickness so as to suppress thermal deformation and corrosion as much as possible.

In addition, the upper and lower supporting beams 143 and 144 have a predetermined length of beam members that are supported while connecting the pair of sealing panels 141 and 142 disposed to face each other on both sides of the heat transfer assembly 100 therebetween. to be.

Between the upper and lower support beams 143,144 and the heat transfer assembly 100, one end is in contact with one side of the upper and lower support beams 143,144 to be welded and fixed, and the other end to the outer surface of the heat transfer assembly 100. It includes upper and lower elastic support plates 145 and 146 of a predetermined length bent at a right angle so as to be welded and fixed.

On the other hand, the rectifying plate 150, as shown in Figures 1, 2 and 4, the low-temperature gas supply duct 160 for supplying the low-temperature gas to the inlet-side lower region of the heat transfer assembly 100 connected to The upper rectifying region (A) through which the low-temperature gas passes and the supply of the low-temperature gas are provided by penetrating through a plurality of inlet holes (151, 152, 153) that are installed, and the inner diameter size decreases toward the same self-weight direction as the traveling direction of the high-temperature gas. A lower blocking region (B) is formed.

The upper rectifying region (A) has a first rectifying region (A1) having a plurality of first rectifying holes (151) having a predetermined size, and a second having a smaller inner diameter than the inner diameter of the first rectifying hole (151). A second rectifying region A2 through which a plurality of rectifying holes 152 are formed and a third rectifying region through which a plurality of third rectifying holes 153 having an inner diameter smaller than the inner diameter of the second rectifying holes 152 are formed through (A3).

At this time, the first, second and third commutation holes are shown and described as being formed through a substantially circular hole, but the present invention is not limited thereto, and may be provided as a straight slit hole.

Here, the opening area formed by the plurality of first rectifying holes 151 formed through the first rectifying region A1 and through which the low-temperature gas passes is a plurality of second rectifying holes in the second rectifying region A2. It is larger than the opening area formed by 152, and the opening area of the second rectifying area A2 is formed by a plurality of third rectifying holes 153 formed through the third rectifying area A3. Since it is provided larger, the amount of low-temperature gas supplied to the inside of the heat-transfer assembly in the first, second and third rectification regions is different from each other.

In addition, the first, second and third rectifying plates are shown to penetrate through the first, second and third rectifying holes having different inner diameter sizes so as to form first, second and third rectifying regions having different opening areas. Although described, the present invention is not limited thereto, and the first, second and third rectifying regions having different opening areas may be formed by the number of rectifying holes having the same inner diameter, respectively.

That is, as it goes in the same self-weighting direction as the traveling direction of the high-temperature gas, the supply amount of low-temperature gas is sequentially decreased in the order of the first, second and third rectification regions, and the supply of low-temperature gas is not made in the lower blocking region.

In this case, the rectifying plate 150 having the upper rectifying region (A) and the lower blocking region (B) has a temperature higher than the temperature of the low-temperature gas supplied through the second fluid passage (F2). It is installed in the lower region of the inlet side of the second fluid passage corresponding to the outlet of the first fluid passage (F1) through which the gas passes, thereby reducing the supply amount of the low-temperature gas exchanged with the hot gas at the outlet side of the first fluid passage. Therefore, it is possible to reduce the temperature drop rate so that the temperature of the high-temperature gas is maintained above the temperature at which the acid dew point occurs (hereinafter, the temperature at which the acid dew point occurs) from the outlet side of the first fluid passage toward the inlet side of the second fluid passage.

That is, when the rectifying plate is not installed in an area corresponding to the lower portion of the inlet side of the second fluid passage, the high-temperature gas supplied to the inlet side of the first fluid passage and the low-temperature gas supplied to the inlet side of the first fluid passage While crossing each other in the heat transfer assembly, the high temperature gas passes through the first fluid passage and heat exchanges with the low temperature gas, so that the temperature at the outlet side becomes relatively lower than the inlet side of the first fluid passage and at the same time, the high temperature gas passes and discharges. It has a heat exchange temperature characteristic in which the temperature decrease of the high-temperature gas becomes severe as it approaches the inlet side where the low-temperature gas flows from the outlet side of the first fluid passage.

Here, assuming that the temperature at which the acid dew point occurs in the high temperature gas containing the acid component is approximately 110 ° C to 130 ° C, the heat is exchanged with the low temperature gas at the lower portion of the heat transfer assembly forming the outlet of the first fluid passage to dissipate heat and then discharged. Since the temperature of the high-temperature gas decreases as it approaches the outlet side where the high-temperature gas is discharged and toward the inlet side where the low-temperature gas flows, it approaches the temperature at which the acid dew point occurs, so the temperature of the high-temperature gas increases from the outlet side of the first fluid passage to the inlet side of the second fluid passage. The incidence of formation of acid dew point on the surface of the heat transfer plate in contact with is high.

On the other hand, when the rectifying plate is installed in an area corresponding to the lower portion of the inlet side of the second fluid passage, as shown in FIG. 7, the first flow so as to exchange heat with the hot gas discharged to the outlet side of the first fluid passage Since the supply amount of the low-temperature gas supplied to the lower side of the inlet of the fluid passage can be reduced toward the outlet side of the first fluid passage, the high-temperature at the outlet side of the first fluid passage through which heat-extracted high-temperature gas is discharged by heat exchange with the low-temperature gas The temperature of the gas does not decrease as it approaches the inlet side of the second fluid passage through which the low-temperature gas flows, and has a heat exchange temperature characteristic that keeps constant.

That is, when the temperature of the acid dew point of the high-temperature gas is approximately 110 ° C to 130 ° C, the temperature of the high-temperature gas that is discharged after being heat-exchanged with the low-temperature gas at the lower portion of the heat transfer assembly forming the outlet of the first fluid passage Is to prevent the acid dew point from being generated on the surface of the heat transfer plate directly in contact with the high temperature gas because it keeps constant above the temperature at which the acid dew point is generated toward the inlet side of the second fluid passage through which the low temperature gas flows.

Meanwhile, as illustrated in FIGS. 5A to 5C, the first, second, and third rectifying regions A1, are shown in the duct 160 for supplying low-temperature gas in communication with the inlet of the second fluid passage of the heat transfer assembly 100. A2, A3) are fixed to a plurality of laminar flow plates 161 at regular intervals to form first, second, and third laminar flow regions (C1, C2, C3) that are separated from each other in one-to-one correspondence and guide and supply low-temperature gas. Can be installed.

In this case, the supplied low-temperature gas guided through the separated first, second and third laminar flow regions C1, C2 and C3 are divided into the first, second and third rectification regions A1, A2 and A3, respectively. It can supply stably.

In addition, by forming a plurality of through holes in the laminar flow plate in the lowermost layer or removing the laminar flow plate in the lowermost layer, a low-temperature gas guided to the laminar flow region corresponding to the blocking region can be supplied to the third rectification region.

Meanwhile, as shown in FIG. 5A, the rectifying plate 150 is fixed to the heat transfer assembly 100 corresponding to the lower area of the inlet of the second fluid passage, or the second of the heat transfer assembly is supplied with the low-temperature gas. It may be fixedly installed in the lower portion of the outlet of the low-temperature gas supply duct 160 in communication with the inlet of the fluid passage.

The rectifying plate 150 may be fixedly installed at the lower side of the inlet side of the second fluid passage of the electrothermal assembly or at the lower side of the outlet side of the duct for supplying low-temperature gas, but is not limited thereto. It can be installed in a rotational structure so that it can be selectively used depending on the winter temperature when the temperature of the temperature drops below zero and during the summer when the temperature of the low temperature gas rises above 30 degrees.

This is because the temperature difference between the high-temperature gas and the low-temperature gas is large while supplying the low-temperature gas, which is the outside air whose temperature has dropped below zero, in winter, and condensation occurs frequently, but in the summer, the low-temperature gas, which is high temperature outside air, is heat-assembled. As the temperature difference between the high-temperature gas and the low-temperature gas is reduced while supplying to the furnace, condensation does not occur and evaporates.

That is, the rectifying plate 150, as shown in Figure 5b, a pair of hinges that are each rotatably assembled to a pair of hinge holes 156 formed through the bottom of the inner side of both sides of the low-temperature gas supply duct 160 Shafts 155 may be provided at both lower ends, and guide jaws 155a guided along arc-shaped guide grooves 156a formed on both inner surfaces of the low-temperature gas supply duct 160 may be provided at both upper ends. .

Accordingly, in the summer when the air temperature is high, the rectifying plate 150 is rotated by rotating the hinge shaft 155 of the rectifying plate 150 drawn out through the hinge hole 156 of the low-temperature gas supply duct 160. Is converted from a vertical state to a horizontal state and positioned on the inner bottom surface of the low-temperature gas supply duct 160, while in the winter when the air temperature drops below zero, the hinge axis 155 of the rectifying plate 150 is rotated to operate horizontally. By switching from a state to a vertical state, it is possible to control the supply amount of the low-temperature gas supplied to the lower side of the inlet of the second fluid passage of the heat transfer assembly.

The rectifying plate 150, as shown in Figure 5c, a pair of hinge shafts each assembled rotatably in a pair of hinge grooves (156a) recessed on the inner side of the lower side of the low-temperature gas supply duct 160 ( 155) is provided on both sides of the lower side, the guide jaw 155a is guided along the arc guide grooves 156a formed on both sides of the inner side of the duct 160 for supplying the low-temperature gas are provided at both ends of the upper side, It may include a magnet member 159 that generates a magnetic force by applying a magnetic force to the provided pizza seat member 158.

Accordingly, the rectifying plate 150 is seasonally changed or operated by a magnet member 159 that generates a magnetic force by applying a magnetic force to the pizza seat member 158 on the outer surface of the low-temperature gas supply duct 160. Depending on the conditions, it can be converted from a vertical state to a horizontal state or from winter to a horizontal state in the winter.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and various substitutions, modifications and changes are possible within the scope of the present invention without departing from the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

100: electrothermal assembly
200: plate heat exchanger
110,120: 1st, 2nd heating plate
111,121: Heat transfer surface
112,122: 1st floor plan
114,124: Second Plan Ground
130: heat transfer shell
140: frame portion
150: rectifying plate
160: low temperature gas supply duct

Claims (7)

A first flange having a first flange surface that is bent to one side of one side of the heat transfer surface on a square plate, and a second flange surface that is bent to the other side of the other edge of the heat transfer surface adjacent to one end of the first flange surface, Two heating plates;
The first flange surface of the first and second heat transfer plates and the outer edges of the heat transfer surfaces of the other heat transfer plates facing each other are spaced apart from each other to form an inlet portion and an outlet portion, and a second of the one heat transfer plate of the first and second heat transfer plates A heat transfer shell in which the flange surface and the other outer border of the heat transfer surface of the other heat transfer plate facing the same are welded integrally to form an internal passage between the first heat transfer plate and the second heat transfer plate;
Each of the first and second flan plates of the first and second heat transfer plates forming the inlet and outlet portions of the inner passage of the heat transfer shell is interviewed with the outer edge of the heat transfer surface that does not form the first flank in another heat-shell that is stacked adjacent to each other. An electro-thermal assembly in which the heat-transfer shells are stacked in multiple layers while being integrally welded, and a second fluid passage intersecting at right angles to the first fluid passage formed by the internal passages for each of the plurality of heat-transfer shells;
A frame portion having a plurality of support beams connecting between a pair of sealed panels facing both outer surfaces of the heat transfer assembly; And
Upper rectification through which the low-temperature gas passes by forming a plurality of rectifying holes having a smaller inner diameter as it goes toward the self-weight direction in the lower area of the inlet of the second fluid passage connecting the duct for supplying the low-temperature gas to the low-temperature gas supply duct. A rectifying plate forming a region and a lower blocking region blocking the supply of the low-temperature gas; Including,
The upper rectifying region includes a first rectifying region having a plurality of first rectifying holes having a predetermined size, and a second rectifying region having a plurality of second rectifying holes having an inner diameter smaller than the inner diameter of the first rectifying hole, and And a third rectifying region through which a plurality of third rectifying holes having an inner diameter size smaller than the inner diameter of the second rectifying hole are formed, and through the first, second and third rectifying regions and an outlet side of the first fluid passage. The temperature of the high-temperature gas discharged after being heat-exchanged with the low-temperature gas by reducing the supply amount of the low-temperature gas flowing into the inside from the inlet side of the corresponding second fluid passage toward the outlet side of the first fluid passage through which the high-temperature gas passes and is discharged. While minimizing the degradation, it remains constant above the temperature at which the acid dew point occurs,
At the outlet end of the low-temperature gas supply duct, a plurality of laminar flow plates are formed to form first, second, and third laminar flow regions for guiding and supplying low-temperature gas in a one-to-one correspondence with the first, second and third rectification regions formed on the rectifying plate. Including,
The rectifying plate is formed through the bottom of both sides of the inner side of the duct for supplying the low-temperature gas so that the temperature of the low-temperature gas supplied to the inside of the heat transfer assembly can be selectively used depending on the winter time when the temperature of the low-temperature gas is lowered below zero and the summer time when the temperature of the low-temperature gas is increased. A pair of hinge shafts, which are each rotatably assembled to a pair of hinge holes, are provided at both lower ends, and the guide jaws guided along the arc guide grooves formed on both sides of the inner side of the duct for supplying low-temperature gas are provided at both upper ends for rotation. Plate heat exchanger, characterized in that provided. delete delete delete delete delete delete

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