KR200237867Y1 - Plate type heat exchanger using gas - Google Patents

Abstract

The present invention is passed through the air supply fluid to the inner space of the unit heat plate combined the upper plate and the lower plate formed a plurality of ridges in a predetermined direction on the metal plate of the standard product, and laminated a plurality of unit heat transfer plate to open the space between each unit heat transfer plate The present invention relates to a plate heat exchanger for gas, which allows a gas to pass through so that a heat exchange action is carried out between the fruit gas and the supply fluid. In the plate heat exchanger according to the present invention, an upper plate having a plurality of raised portions protruding in a predetermined direction on a metal plate, and a lower plate having a plurality of raised portions formed at a position intersected with the raised portions of the upper plate are bonded to the metal plate to supply air to the internal space. It consists of one or more unit heat exchanger plate manufactured to pass through, and one or more heat transfer plate bundle for stacking a plurality of the unit heat transfer plate to pass the fruit medium gas to the space between each unit heat transfer plate. On the other hand, the space through which the air supply fluid and the fruit opening gas pass can be reversed as necessary.

Description

Plate type heat exchanger using gas

The present invention is a device for recovering the energy of the waste gas or exhaust gas discarded in the industrial field, and relates to a gas plate heat exchanger consisting of a unit heat transfer plate having a ridge projecting in a predetermined direction.

In the final energy consumption of our country, the industrial sector uses the highest energy of 56% of the entire sector, of which 60% is lost to waste energy. In addition, a considerable amount of waste heat from incineration of domestic industrial waste is discarded, which is a huge loss at the national level.

Such discarded waste gas and exhaust gas contain a lot of harmful components that depend on the temperature conditions, which is difficult to recover energy by the existing heat exchanger. In addition, although the above-mentioned problems can be partially solved with expensive materials, current welding techniques and assembly techniques are difficult to manufacture and use. Therefore, they may be manufactured at high prices, imported from foreign countries, or replaced with other tubular heat exchangers. This situation is not widely spread.

As an example, as shown in Fig. 1 (a), (b), (c), and (d), which show a conventional heat exchange plate for a plate heat exchanger, the edge of a predetermined height is conventionally used to form and reinforce the flow path of the heat transfer plate 1. After the bars 2, 5, the stud pins 4 or the reinforcement plate 3 are welded to the heat transfer plate 1, the C portion of each heat transfer plate 1 is overlapped and welded up and down. After stacking the heat transfer plates made 90 ° alternately, the heat transfer plates were stacked at corners of the frame 6 and the spring seal 9, as shown in Figs. We weld all around the D and E parts to make the plate heat exchanger completely sealed to prevent leakage and mixing of exhaust gas and air supply.

However, the industrial plate heat exchanger manufactured by such a process is difficult to adjust and expand the heat exchanger plate according to the amount of fluid, and it is accompanied by torsional deformation of the heat transfer plate due to the whole circumferential welding, and it is difficult to assemble according to the deformation, and temperature change Stress corrosion occurs due to the welding site has a problem that it is difficult to maintain airtight. In addition, the heat transfer plate, the frame, and the corner of the spring chamber are fragile welds, and thus cracks or breakages occur easily, and due to difficulty in welding and poor welding of the release material, the heat transfer plate, the frame, and the spring chamber corners cannot be properly applied according to the types and conditions of the waste gas and exhaust gas. .

Accordingly, an object of the present invention is to pass an air supply fluid into an inner space of a unit heat exchanger plate that combines a top plate and a bottom plate formed by protruding a plurality of ridges in a predetermined direction on a metal plate of a standard product, and stack the unit heat transfer plates to form a plurality of conventional heat transfer plates. Unlike the structure of lamination welding alternately with., It is to provide a gas plate heat exchanger which allows heat exchange gas to pass between the nut opening gas and the supply fluid by passing the nut opening gas into the space between the unit heat transfer plates.

1 is a heat transfer plate structure diagram of a conventional plate heat exchanger.

Figure 2a, b is a plan view and a cross-sectional view of the heat transfer plate upper plate used in the heat exchanger of the present invention.

Figure 3a, b is a plan view and a cross-sectional view of the lower plate of the heat transfer plate used in the heat exchanger of the present invention.

Figure 4a, b, c is an exploded perspective view, cross-sectional view and assembly view of the unit heat exchanger plate used in the heat exchanger of the present invention.

5 is various embodiments of the ridges.

6 is a perspective view of the unit heat transfer plate laminated.

7 is a perspective view of a heat transfer plate bundle of a heat exchanger according to the present invention.

8 is an exploded perspective view of a heat exchanger according to the present invention.

Fig. 9 is a front view of the X-X part of Fig. 8;

Fig. 10A is a sectional view of the Y-Y section in Fig. 8;

10B is a detailed view of portion C of FIG. 10A;

11 is an exemplary view showing various combinations of the heat transfer plate bundle of the present invention.

<Description of Drawing>

Upper plate 10, ridge 12, upper edge 14, 14 ', spot welding device 20, lower plate 30, ridge 32, lower edge 34, 34', unit Heat transfer plate 50, heat transfer plate bundle 60, heat transfer sheet 62, sealing frame 64, upper frame 66, lower frame 68, body frame 70, 70 ', gasket 72, 72' ), Spring Seal (74), Air Guide Van (76)

Definition of Terms

The term 'plate heat exchanger for gas' (hereinafter, 'plate heat exchanger') is defined as a heat exchanger that heats an air supply fluid such as cold air by using hot gas such as waste gas or exhaust gas as hot-dip gas. In gas plate heat exchangers, the air to be warmed and the fruit gas must not be separated and leaked with the heat path between them.

'Heat-mediated gas' means high-temperature waste gas, flue gas, etc. as a heat source.

The 'air supply fluid' means a fluid such as a gas which takes heat from the fruit opening gas (by heat exchange action) and heats it up.

Overview of the devise

In order to achieve the above object, the plate heat exchanger according to the present invention has a top plate with a plurality of ridges protruding in a predetermined direction on the metal plate, and a bottom plate formed with a plurality of ridges on the metal plate at a position that is crossed with the ridges of the top plate One or more unit heat exchangers, which are bonded and manufactured to allow the supply fluid to pass into the internal space,

It consists of one or more heat transfer plate bundles for stacking a plurality of unit heat transfer plate to pass the fruit medium gas to the space between each unit heat transfer plate.

Unlike the structure in which the plate heat exchanger for gas according to the present invention is laminated and welded to alternately heat transfer plates at 90 °, the unit heat exchanger can obtain a staggering effect at 90 ° by simply stacking the unit heat exchangers in the same direction. The heat exchange action is performed between the air supply fluid passing through the inner space of the heat transfer plate and the fruit heating gas passing through the space between the unit heat transfer plates stacked on the heat transfer plate bundle.

Example

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. 2a to 5 show the structure of the heat transfer plate used in the plate heat exchanger for gas of the present invention.

Figure 2a shows a top plate 10 which is one component constituting the heat transfer plate used in the plate heat exchanger of the present invention, Figure 2b shows a cross-sectional view of the A-A portion of Figure 2a. The upper plate 10 is manufactured by embossing the ridges 12 in a predetermined direction with a press on a commercially available metal plate. The height and spacing of the ridges 12 may be determined according to the type of fruiting gas to be used, installation conditions, air volume, and the like. The height of the ridge 12 can be adjusted by adjusting the stroke of the press during press molding. In addition, the material of the metal plate may be a material suitable for special conditions such as corrosion resistance, heat resistance, chemical resistance, etc. according to the use conditions of the fluid, or selectively surface treatment on the exhaust gas side or the air supply side to meet various design requirements. In addition, since the molding process by the press can maintain a smooth heat transfer surface without the oxidation site of the heat transfer plate due to the welding of the existing heat transfer plate.

The top plate 10 of Fig. 2A is shaped so that the edges 14, 14 '(' top edge portion ') of the left and right sides are folded stepwise so that the height T of the step is equal to the height H of the ridge 12. These top edge portions 14, 14 'together with the bottom plate, which will be described later, serve to maintain airtightness with the space where the air supply fluid passes.

Figure 3a shows a lower plate 30, which is another component constituting the heat transfer plate used in the plate heat exchanger of the present invention, Figure 3b shows a cross-sectional view B-B portion of Figure 3a. Like the upper plate 10, the lower plate 30 is produced by protruding the ridge 32 in a predetermined direction by pressing on a metal plate of a standard product. The height of the lower plate ridge 32 may also be determined according to the type of nut opening gas (waste gas, exhaust gas, etc.), installation conditions, air volume of the fluid, and the like. The ridge 32 of the lower plate 30 is formed to be staggered with the position of the ridge 12 of the upper plate 10. 2A and 3A, it will be seen that the positions of the ridges 12 and 32 are not overlapped with each other. The left and right side edges 34 and 34 'and' lower edge portion 'of the lower plate 30 of FIG. 3A are bent with' c 'to be assembled with the edge portion 14 and 14' of the upper plate 10. Explained).

4A to 4C show the unit heat plate 50 assembled by stacking the upper plate 10 and the lower plate 30. In both the upper plate 10 and the lower plate 30, the ridges 12 and 32 should protrude in a certain direction. A cross-sectional view of the assembled state is shown in Fig. 4b. When the upper plate 10 is placed on the lower plate 30, the ridges 12 and 32 are arranged alternately with each other, so that the ridges 12 and 32 are arranged at regular intervals as shown in FIG. 4C without overlapping ridges. Insert the edge portions 14, 14 'of the upper plate 10 into the edge portions 34, 34' of the lower plate 30, and then the edge portions 14, 14 ', 34, of the upper plate 10 and the lower plate 30. 34 ') is press-contacted by a press to create a unit heat plate 50 for maintaining the space and fluid tightness. The upper edge 14, 14 'and the lower edge 34, 34' are spot-welded using the spot welding apparatus 20. FIG. The spot welding is also performed on the contact portion between the raised portion 12 and the lower plate 30 of the upper plate 10. In this way, the bonding strength between the upper plate 10 and the lower plate 30 can be increased. This spot welding is for reinforcing the mechanical strength of the unit heat-transfer plate 50 according to the wind pressure of each fluid, and may be performed in several places or all places according to the needs of a use condition.

4C conceptually illustrates a unit heat exchanger plate 50 having completed assembly and a supply air flowing through the unit heat transfer plate 50. The ridges 12 of the upper plate 10 are indicated by solid lines, and the ridges 32 of the lower plate 30 are indicated by dotted lines. 4C is manufactured so that the upper plate 10 and the lower plate 30 form spaces at regular intervals using the upper plate ridges 12 as spacers.

The ridges 12 and 32 of the upper plate 10 and the lower plate 30 can be protruded into various shapes in addition to the hemispherical shapes shown in Figs. 2A to 4C. For example, as shown in FIG. 5, hemispheres may be formed in (a) hemisphere, (b) cone, (c) triangle (delta), and (d) Y-shape. In other words, the shape of the ridges 12 and 32 is not a problem, but protrudes to maintain a constant gap between the upper plate 10 and the lower plate 30, but protrudes without cracks or burrs from the metal plate by one press molding. Any shape can be used as long as it is a shape. This is obvious to those skilled in the art.

6 illustrates a concept of implementing a plate heat exchanger according to the present invention by stacking the unit heat plates 50 of FIG. 4C. It has been described that the air supply fluid passes through the space between the upper plate 10 and the lower plate 30 of the unit heat plate 50. In addition, as shown in FIG. 6, the space between the unit heat plate 50 and the unit heat plate 50 is a lower plate ridge of the unit heat plate 50 located in the upper portion and an upper plate of the unit heat plate 50 located in the lower portion. It is formed between) and passes through the fruit opening gas. Therefore, the supply air is warmed by the hot waste gas and discharged to the other side. This causes the heat exchange action.

The concept of FIG. 6 may be implemented as shown in FIG. 7. 7 shows a heat transfer plate bundle 60 in which a plurality of unit heat transfer plates 50 are inserted and welded side by side to the heat transfer sheet 62. By combining a large number of hexahedral heat transfer plate bundles 60 as shown in FIG. 7, it is possible to install the plate heat exchanger of the present invention in a desired space of a desired capacity. The structure of the heat transfer plate bundle 60 of FIG. 7 can be seen in FIGS. 8, 9, 10a, and 10b. FIG. 8 is an exploded perspective view of the heat exchanger assembled with the heat exchanger bundle 60, FIG. 9 is a front view of the XX part of FIG. 8, FIG. 10A is a sectional view of the YY part of FIG. 8, and FIG. 10B is a detail C part of FIG. It is also.

In FIG. 8, a plurality of slits are formed in the heat transfer sheet 62, and a unit heat transfer plate 50 is inserted into each slit and welded thereto. That is, a plurality of unit heat transfer plates 50 are stacked and open side by side to supply air fluid. In FIGS. 7 and 8, the intervals between the unit heating plates 50 are exaggerated wide, but in actual production, only the gaps of the ridges 32 of the lower plate of the unit heating plates are separated.

8, the sealing frame 64 is joined to the upper and lower sides of both ends of each unit heat exchanger plate 50 in a state in which a plurality of unit heat transfer plates 50 are inserted and stacked. The sealing frame 64 is coupled to the spring seal (74) and the upper frame (66). In addition, the sealing frame 64 ′ and the lower frame 68 are bonded to the lower portion of the heat transfer sheet 62. The body frames 70 and 70 'are bonded to the side surfaces of the heat transfer sheet 62. The spring chamber 74 serves to absorb the thermal expansion of the unit heat transfer plate 50 due to the hot nut gas, and has a U-shaped frame structure.

FIG. 9 is a front view of the X-X part of FIG. 8, in which a plurality of unit heat transfer plates 50 are stacked. A plurality of unit heat transfer plates 50 are inserted in the heat transfer sheet 62, the lower frame 68 is joined to the lower portion, and the spring chamber 74 and the upper frame 66 are joined to the upper portion. Further, body frames 70 and 70 'are joined to both sides. The sealing frames 64 and 64 'are welded to the heat transfer sheets 62 at upper and lower ends of each unit heat transfer plate 50 to prevent mixing of the nut opening gas and the supply air.

FIG. 10A is a longitudinal cross-sectional view (Y-Y cross-sectional view) of FIG. 8, in which one unit heat exchanger plate 50 can be seen. A cross section of the spring chamber 74 and the upper frame 66 is shown above the unit heat plate 50, and a cross section of the lower frame 68 is shown below the unit heat plate 50. In addition, the cross section of the heat transfer sheet 62 is seen on the left and right sides of the unit heat exchanger plate 50. In Fig. 10A, the air supply fluid passes in the horizontal direction, and a fruit gas such as waste gas passes in the vertical direction.

10B, the structure of the spring chamber 74 and the sealed structure of each unit heat exchanger plate 50 are demonstrated. 10B is a detailed view of portion C of FIG. 10A. The joint surface with the upper frame 66 and the joint surface with the heat transfer sheet 62 are fastened by bolts with the gaskets 72 and 72 'interposed therebetween. The gaskets 72 and 72 'serve to prevent leakage of the nut opening gas and the supply fluid. The spring chamber 74 is installed in a U-shaped frame structure, and an air guide van 76 is installed to prevent free passage of the supply fluid due to the U-shaped space of the spring chamber 74, and the structure is a spring chamber ( It is a sliding type to move freely according to the expansion and contraction of 74). In FIG. 10B, the unit heat transfer plate 50 and the heat transfer sheet 62 may be combined.

11 is an exemplary view showing a combination method of each heat transfer plate bundle 60. It is exemplified that the heat transfer plate bundle 60 can be combined back and forth (a), left and right (b), and up and down (c) as necessary. Assembly of the heat transfer plate bundle 60 is a sealing frame (64, 64 '), the upper frame 66, the lower frame bonded to the outer contact surface of the heat transfer plate bundle 60 and the heat transfer sheet 62 of the heat transfer plate bundle 60. 68, a hole is formed in the contact surface of the body frame 70, 70 'coupled to the side of the heat transfer sheet 62. Through these holes, all components can be assembled, disassembled, and expanded by assembling each heat transfer plate bundle 60 using fastening means such as bolt nuts.

As described above, according to the present invention, it is possible to easily manufacture the unit heat exchanger plate by forming only the ridge by press molding on the metal plate, and by stacking the unit heat exchanger in the same direction, the existing heat transfer plate is 90 ° for heat exchange action. The complex work of staggering is simplified, and it is easy to expand by unit heating plate and heating plate bundle structure, and the heating plate can be manufactured according to specific conditions, and the utilization of energy recovery is very high. Quality is very advantageous in terms of price competitiveness, and all components are prefabricated for easy maintenance, maintenance, repair and replacement.

Claims (7)

A plate heat exchanger for gas that uses a heat exchange action between a fruit gas and an air supply fluid, The upper plate 10 in which a plurality of ridges 12 protrude in a predetermined direction on the metal plate, and the plurality of ridges 32 in a predetermined direction on the metal plate alternate with the ridges 12 of the upper plate 10. At least one unit heat exchanger plate 50 formed to be bonded to the lower plate 30 to be connected to supply air to the internal space, A plate heat exchanger for a gas comprising one or more heat transfer plate bundles (60) for stacking the plurality of unit heat transfer plate (50) to pass through the nut opening gas to the space between each unit heat transfer plate (50). The method of claim 1, wherein the heat transfer plate bundle 60 A plurality of unit heat transfer plates 50 are inserted and welded to the upper part of the pair of heat transfer sheets 62 and the heat transfer sheets 62 into which the unit heat transfer plates 50 are inserted to prevent leakage of the nut carrier gas and the supply fluid. The sealing frame 64 and the spring frame 74 and the upper frame 66 coupled to the upper portion of the sealing frame 64, the sealing frame 64 'and the lower frame coupled to the lower portion of the heat transfer sheet 62 ( 68), it is composed of the body frame 70, 70 'coupled to the side of the heat transfer sheet 62, Gaskets 72 and 72 'are positioned at the joint surface of the sealing frame 64, the spring chamber 74 and the upper frame 66, and the joint surface of the heat transfer sheet 62 to leak the fruit gas and the supply fluid. And a U-shaped spring chamber 74 for absorbing thermal expansion of the unit heat pipe 50 due to the high temperature of the nut opening gas. A gas plate heat exchanger, characterized in that the air guide van 76 is installed to prevent free passage of the supply fluid due to the U-space of the spring chamber (74). 3. The sealing frames 64 and 64 ′ are welded to the heat transfer sheets 62 at upper and lower ends of both ends of the unit heat transfer plate 50, thereby preventing mixing of the nut carrier gas and the supply air. Plate heat exchanger for gas. In the unit heat transfer plate 50, the left and right edge portions 14 and 14 'of the upper plate 10 are processed stepwise, and the left and right edge portions 34 and 34' of the lower plate 30 are Gas, characterized in that the bend, 'b', the upper plate 10 and the lower plate 30, the edge portion (14, 14 ', 34, 34') of the assembly is assembled by pressing after pressing to be in close contact with each other Plate heat exchanger. In claim 1 or 4, the edge portion 14, 14 'of the upper plate and the edge portion 34, 34' of the lower plate and the contact portion of the ridge 12 and the lower plate 30 of the upper plate 10 is spot welded A plate heat exchanger for gas. The gas plate heat exchanger of claim 1 or 4, wherein the ridges 12 and 32 of the upper plate 10 and the lower plate 30 are either hemispherical, conical, triangular (delta) or Y-shaped. . The sealing frame (64, 64 '), the upper frame 66, the lower frame which is bonded to the outer contact surface of the heat transfer plate bundle 60 and the heat transfer sheet 62 of the heat transfer plate bundle 60 in claim 1, or 2,3 68), the contact surface of the body frame (70, 70 ') coupled to the side of the heat transfer sheet 62 is formed so that all components can be assembled, dismantled, expanded to be fastened by the fastening means, characterized in that Plate heat exchanger for gas.