CN202719904U - A High Pressure Resistant Circular Corrugated Plate Shell Heat Exchanger - Google Patents

Abstract

The utility model aims to provide a high-pressure-resistant circular corrugated plate shell-and-plate heat exchanger, which comprises a shell, cover plates, a corrugated plate bundle, flow guide blocks and supporting plates, wherein the corrugated plate bundle comprises corrugated plates and is fixedly arranged in the shell through the supporting plates; the two ends of the shell are sealed by the cover plates; the shell is provided with a shell pass outlet and a shell pass inlet; the cover plates are provided with plate pass inlets and plate pass outlets; an annular region between the shell and the corrugated plate bundle is divided into a shell pass inlet chamber and a shell pass outlet chamber by the flow guide blocks; the shell pass inlet is communicated with the shell pass inlet chamber; the shell pass outlet is communicated with the shell pass outlet chamber; the corrugated plate bundle is provided with angular holes; and the plate pass inlet and the plate pass outlet are communicated through the angular holes of the corrugated plate bundle. The high-pressure-resistant circular corrugated plate shell-and-plate heat exchanger has the advantages of high bearing capacity, high heat exchange efficiency, compact structure, large heat transfer area in a unit volume, wide material selection range, wide application range, simple machining and easiness in mounting.

Description

A High Pressure Resistant Circular Corrugated Plate Shell Heat Exchanger

technical field

The utility model relates to a heat exchanger in the technical field of enhanced heat exchange.

Background technique

Plate heat exchangers are widely used in energy, power, heating, refrigeration and other fields due to their high heat transfer efficiency and compact structure. With the maturity of plate heat exchanger technology, it has replaced the traditional shell and tube heat exchanger in some fields. However, the existing rectangular plate heat exchanger generally has the problem of low pressure bearing capacity. In petrochemical and other common high-pressure fields, the application of plate heat exchangers has been greatly restricted. Developing a plate heat exchanger that can withstand high pressure and has a compact structure has broad application prospects in the field of energy and power. Although there are some fully welded plate and shell heat exchangers at present, their working pressure generally does not exceed 4.5MPa, and their volume is relatively large and their compactness is not high. These fully welded plate and shell heat exchangers use rectangular plates as heat transfer elements, and the plate bundles are placed in rectangular or circular shells to improve pressure performance. This kind of plate heat exchanger has limited pressure bearing capacity and large volume.

In ordinary plate heat exchangers, the channel structure of the two media is the same. For some working conditions where the physical properties of the heat exchange media on both sides are quite different, there will be design mismatches, which will result in waste of volume and materials. For example, when using water to cool high-viscosity lubricating oil, since the viscosity of the lubricating oil is much higher than that of water, the flow resistance of the lubricating oil will be much higher than that of the cooling water at the same flow rate, and usually the flow resistance of the lubricating oil meets the design requirements When the upper limit is reached, the flow resistance on the cooling water side is far from the limit value, which causes design waste.

Contents of the invention

The purpose of the utility model is to provide a high-pressure-resistant circular corrugated plate-shell heat exchanger suitable for heat exchange between different types of fluids, especially for heat exchange between two media with large thermal and physical properties differences.

The purpose of this utility model is achieved in that:

The utility model is a high-pressure-resistant circular corrugated plate-shell heat exchanger, which is characterized in that it includes a shell, a cover plate, a corrugated plate bundle, a diversion block, a support plate, and the corrugated plate bundle includes a corrugated plate, The corrugated plate bundle is fixed in the shell through the supporting plate, the two ends of the shell are sealed by the cover plate, the shell side outlet and the shell side inlet are set on the shell, the plate side inlet and the plate side outlet are set on the cover plate, the shell and the corrugated plate The annular area between the plate bundles is divided into a shell-side inlet chamber and a shell-side outlet chamber by a deflector block. The shell-side inlet is connected to the shell-side inlet chamber, and the shell-side outlet is connected to the shell-side outlet chamber. There are corner holes, and the board side inlet and board side outlet are connected through the corner holes of the corrugated board bundle.

The utility model can also include:

1. Two corrugated plates are pressed together to form a plate pair. The plate pair forms an inter-plate channel between the shell side outlet and the shell side inlet. The plate pairs are connected together to form a corrugated plate bundle. Between the plate pairs Form the inter-board channel between the board-side inlet and the board-side outlet.

2. The plate side inlet is located at the upper end of the heat exchanger body, the plate side outlet is located at the lower end of the heat exchanger body, the shell side outlet is located on the side of the plate side inlet on the shell, and the shell side inlet is located on the side of the plate side outlet on the shell .

3. The corrugated plate adopts a circular plate with straight corrugation or herringbone corrugation, and the corrugation heights on both sides of the corrugated plate are different.

The utility model has the advantages of:

1. Strong pressure bearing capacity. The plates are connected by full welding without sealing gaskets, and the pressure bearing capacity is stronger than that of detachable and brazed plate heat exchangers. Stress concentration occurs when ordinary rectangular plates are under pressure. When the circular plate is under pressure, the stress distribution is uniform, and it is not easy to cause damage and leakage due to local stress concentration, and its pressure bearing capacity is better than that of ordinary rectangular plates. In addition, the plate and shell design is adopted to enclose the plate bundle in the shell, which further improves the sealing performance and pressure bearing capacity.

2. High heat exchange efficiency. The channel between plates in the plate bundle is a herringbone or double herringbone corrugated channel with many cross contact points. The fluid flows in a vortex around the contact point in the channel between the plates, and the turbulence is strong, which can effectively destroy the boundary layer when the viscous medium flows, and play a role in enhancing heat transfer.

3. Compact structure, large heat transfer area per unit volume. The corrugated plates in the utility model are closely arranged, and the overall structure of the heat exchanger is simple and compact. Under the same volume, the utility model has a larger heat transfer area than the shell-and-tube heat exchanger. Compared with the plate and shell heat exchanger with rectangular plates, the structure is more compact.

4. Wide selection of materials. The corrugated plate in the utility model can adopt many different materials, such as various types of stainless steel, copper alloy, titanium alloy, etc., so as to be suitable for different types of heat exchange media.

5. Wide application range. The corrugation heights on both sides of the circular corrugated plate are different, and it has strong applicability when the medium flow and physical parameters on both sides are quite different. And the heat exchanger can be designed with various process combinations for the media on both sides according to actual needs.

6. Simple processing and easy installation. The asymmetric channel circular corrugated plate described in the utility model is convenient and quick to process, has a short production cycle and low cost, and is especially suitable for industrial batch production.

In summary, the utility model is a new type of plate-shell heat exchanger with the characteristics of high pressure resistance of shell-and-tube heat exchangers, high compactness and large heat transfer coefficient of plate heat exchangers, and has a wide range of applications. , high reliability, easy to manufacture, and has good development and application prospects.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is A-A sectional view;

Fig. 3 is a schematic diagram of flow distribution of media on both sides in the utility model;

Fig. 4 is a structural schematic diagram of plate butt welding;

Figure 5 is a structural schematic diagram of plate beam welding.

Detailed ways

The utility model is described in more detail below in conjunction with accompanying drawing example:

In conjunction with Figures 1 to 5, the utility model consists of a board-side inlet 1, a board-side outlet 7, a shell-side inlet 9, a shell-side outlet 3, a shell-side inlet chamber 14, a shell-side outlet chamber 12, corrugated board bundles 5, It is composed of supporting plates 6, 10, deflector blocks 11 and 13, cover plates 2 and 8 on both sides, and housing 4 and other components. The corrugated plate bundle 5 is welded to the support plates 6, 10 through corner holes, and placed in the housing 4 through the support plates 6, 10. The two ends of the plate bundle 5 are compressed and fixed by the cover plates 2 and 8 . The cover plates 2, 8 are welded with the shell 4 to form a complete shell, which encloses the corrugated plate bundle 5 and the supporting plates 6, 10 inside. The annular area between the shell and the plate bundle is divided into a shell-side inlet chamber 14 and a shell-side outlet chamber 12 by guide blocks 11 and 13 . The shell 4 has a shell side inlet 9 and a shell side outlet 3 . The shell-side inlet and the shell-side outlet communicate with the shell-side inlet chamber and the shell-side outlet chamber respectively. The board pass inlet 1 and the board pass outlet 7 are respectively provided on the cover plates 2 and 8 on both sides. The plate way inlet and the plate way outlet are respectively connected with the two corner hole channels of the plate bundle.

The corrugated plate bundle 5 is welded by circular corrugated plates 15 . Figure 4 and Figure 5 are cross-sectional views of the welding process of circular corrugated plates. 2 , 4 , and 5 , the corrugations on both sides of the circular corrugated plates 15 and 17 have different heights. The two corrugated plates are pressed together and welded 16 and 19 along the edges of the corner holes to form a plate pair 20 . After the circular corrugated plates 15, 17 are welded into a plate pair, an inter-plate channel 18 of the shell side is formed inside it. After the circular corrugated plates are welded two by two to form a plate pair, multiple plate pairs are welded to form a corrugated plate bundle. The sheet pairs 20, 22 are pressed together and welded 23 through the edges of the corrugated sheet periphery. The channel between the two pairs of plates forms the inter-plate channel 21 of the plate side.

Fluid can enter the inter-plate channel 18 on the shell side from the gap between the outer peripheries of the two corrugated plates inside the plate pair. The fluid in the corner holes can enter the inter-plate channel 21 of the plate side through the gap between the diagonal holes of two adjacent pairs of plates. As shown in FIG. 4 , due to the different corrugation heights on both sides of the corrugated plate used, the flow channel widths of the adjacent channels 18 and 21 of the plate bundle are different. It has strong applicability when the flow rate or thermal properties of the media on both sides are quite different.

Fig. 3 is a schematic diagram of flow distribution of media on both sides in the utility model. In order to facilitate the observation of the flow of fluid in the channel between the plates, the cross-sectional view of the corrugated plate is represented by a straight line in the figure. Combining Figure 3 with Figures 1 and 2, the board side fluid flows from the board side inlet 1 into the corner hole channel of the board bundle. Referring to FIG. 4 , the plate-side fluid distributes flow through the corner hole channels, and enters the inter-plate channel 21 of the plate side through the corner hole gaps between each plate pair, and enters the corner hole channel on the other side after heat exchange. Finally, the plate-side fluid flows out of the heat exchanger from the out-flow plate-side outlet 7. The shell side fluid flows from the shell side inlet 9 into the shell side inlet chamber 14 . The shell-side fluid is distributed in the shell-side inlet chamber, and enters the shell-side inter-plate channel 18 through the circumferential gaps inside each plate pair, and enters the shell-side outlet chamber 12 after heat exchange. Finally, the shell side fluid flows out of the heat exchanger from the shell side outlet 3. The two media flow in opposite directions in the channels between the adjacent plates respectively, and exchange heat through the corrugated plates.

The plate bundle 5 is welded by plate pairs 20 . Each plate pair 20 is formed by welding two asymmetric circular corrugated plates through two corner holes. The plate pairs 20 are welded through the circular periphery of the plates, and multiple sets of plate pairs 20 are welded together to form a cylindrical plate bundle. The inner channel between the two corrugated plates forming the plate pair 20 is the shell side channel, and the channel between the adjacent plate pairs 20 is the plate side channel. The shell-side channel and plate-side channel can be designed with different widths according to actual needs.

In the asymmetric circular corrugated plate, the central heat exchange area is inclined straight corrugated or herringbone corrugated, and the two sides of the corrugated plate have different corrugated heights. The periphery of the corrugated plate is a flange for welding; the flange protrudes to one side of the plate and is flush with the corrugation on the side. There are two circular corner holes opposite to each other at both ends of the corrugated plate, and the outer periphery of the corner holes is provided with a wing for welding; the wing of the corner hole protrudes to the other side of the plate and the corrugation on the other side is flush.

The support plate 10 is a circular stainless steel plate with a certain thickness. Support plates 6, 10 are arranged at both ends of the plate bundle, and their diameters match the inner diameter of the housing. Have a circular hole on the support plate 6,10. The diameter of the round hole is the same as that of the corner hole on the corrugated plate, and its position corresponds to the position of the corner hole on the corrugated plate. The support plate and the plate bundle are welded through corner holes. The support plate plays a role of supporting and positioning the plate bundle.

The cover plates 2, 8 are thicker circular steel plates. There are circular holes on it, and the positions of the circular holes correspond to the positions of the holes on the support plates 6,10. The cover plate is provided with a board pass inlet and a board pass outlet. The cover plate tightly presses the plate bundles in the shell together to play the role of pressure bearing.

Claims (5)

1. A high-pressure-resistant circular corrugated plate-shell heat exchanger is characterized in that it includes a shell, a cover plate, a corrugated plate bundle, a deflector block, and a support plate, and the corrugated plate bundle includes corrugated plates, corrugated plates, and corrugated plates. The plate bundle is fixed in the shell through the support plate, the two ends of the shell are sealed by the cover plate, the shell side outlet and the shell side inlet are set on the shell, the plate side inlet and the plate side outlet are set on the cover plate, the shell and the corrugated plate plate The annular area between the beams is divided into a shell-side inlet chamber and a shell-side outlet chamber by a deflector block. The shell-side inlet is connected to the shell-side inlet chamber, and the shell-side outlet is connected to the shell-side outlet chamber. The corner hole, the board side inlet and the board side outlet are connected through the corner hole of the corrugated plate bundle. 2. A high-pressure-resistant circular corrugated plate-shell heat exchanger according to claim 1, characterized in that: two corrugated plates are pressed together to form a plate pair, and the inside of the plate pair forms a shell-side outlet, The interplate channel between the shell side inlet, the plate pair is connected together to form a corrugated plate bundle, and the plate pair forms the interplate channel between the plate side inlet and the plate side outlet. 3. A high-pressure resistant circular corrugated plate plate-and-shell heat exchanger according to claim 1 or 2, characterized in that: the plate side inlet is located at the upper end of the heat exchanger body, and the plate side outlet is located at the upper end of the heat exchanger body. At the lower end of the heater body, the shell side outlet is located on the side of the board side inlet on the shell, and the shell side inlet is located on the side of the board side outlet on the shell. 4. A high-pressure-resistant circular corrugated plate-shell heat exchanger according to claim 1 or 2, characterized in that: the corrugated plate adopts a circular plate with straight corrugation or herringbone corrugation, and the two sides of the corrugated plate are The corrugation varies in height. 5. A high-pressure-resistant circular corrugated plate plate-shell heat exchanger according to claim 3, characterized in that: the corrugated plate adopts circular plates with straight corrugations or herringbone corrugations, and the height of the corrugations on both sides of the corrugated plate is different.

Images