Bypass flow prevention device in lamella heat exchanger

Abstract

A bypass flow prevention device in a lamella heat exchanger comprises a heat exchanger shell and a heat exchange plate unit, the heat exchange plate unit is coaxially arranged in the heat exchanger shell, and two identical bypass flow blocking structures are arranged between the inner circumferential faces of the two ends of one diameter of the heat exchanger shell and the outer circumferential face of the heat exchange plate unit. The bypass flow blocking structure comprises a vertical plate and an arc-shaped elastic baffle, the vertical plate is fixedly connected to the outer circumference of the heat exchange plate unit and arranged in the radial direction of the heat exchange plate unit, one side of the arc-shaped elastic baffle is fixedly connected to one side of the vertical plate, and the other side of the arc-shaped elastic baffle is arranged on the inner circumferential face of the heat exchanger shell in an offset mode. Stop iron is fixedly arranged in the inner circumferential face of the heat exchanger shell, and the vertical plate is fixedly connected with the stop iron. Cold fluid bypass flow is prevented through the arc-shaped elastic baffles, the heat exchange efficiency is improved, and the occupied space of the heat exchanger is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange, in particular to heat exchange equipment, in particular to a bypass flow prevention device in a plate and shell heat exchanger. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of the process conditions. The plate and shell heat exchanger has both the high temperature resistance and high pressure resistance of the shell and tube heat exchanger, and the high efficiency of the heat transfer of the plate heat exchanger. In the plate and shell heat exchanger of the prior art, a plurality of circular heat exchange plate units are coaxially and axially spaced in a cylindrical shell. One pipe connects the inlet of all heat exchange plate units, and another pipe connects the outlet of all heat exchange plate units. The hot fluid enters from the pipe inlet on the end face of the shell, flows through the flow channel inside the heat exchange plate unit, and then flows out from the pipe outlet on the same end face of the shell. The inlet of the cold fluid is set on the circumferential surface of the shell, and the outlet of the cold fluid is set on the circumferential surface of the shell, located on the opposite side of the inlet of the cold fluid. The cold fluid flows through the gap between the heat exchange plate units to achieve heat exchange. Ideally, the cold fluid should all flow through the gap between the heat exchange plate units. However, in the actual working process, part of the cold fluid bypasses the heat exchange plate unit along the inner circumferential surface of the shell and reaches the outlet of the cold fluid without being heated, so the heat exchange efficiency is low. Utility Model Content

[0003] The utility model aims to provide a bypass flow prevention device in a plate and shell heat exchanger, which is intended to solve the technical problem in the prior art that part of the cold fluid in the plate and shell heat exchanger bypasses the heat exchange plate unit along the inner circumference of the shell to reach the outlet of the cold fluid and cannot be heated.

[0004] The utility model discloses a bypass flow prevention device in a plate and shell heat exchanger, comprising a heat exchanger shell and a heat exchange plate unit, wherein the heat exchange plate unit is coaxially arranged in the heat exchanger shell, and is characterized in that: two bypass flow blocking structures are arranged between the inner circumferential surface of the heat exchanger shell and the outer circumferential surface of the heat exchanger plate unit, and the two bypass flow blocking structures are respectively arranged at two ends of a diameter of the heat exchanger shell, and any one of the bypass flow blocking structures each comprises a vertical plate and an arc-shaped elastic baffle plate, in any one of the bypass flow blocking structures, the vertical plate is fixedly connected to the outer circumference of the heat exchanger plate unit and is arranged along the radial direction of the heat exchanger plate unit, and extends from one end of the heat exchanger shell to the other end of the heat exchanger shell, the arc-shaped elastic baffle plate also extends from one end of the heat exchanger shell to the other end of the heat exchanger shell, one side of the arc-shaped elastic baffle plate is fixedly connected to one side of the vertical plate, and the other side of the arc-shaped elastic baffle plate is offset on the inner circumferential surface of the heat exchanger shell, and a stop iron is fixedly arranged in the inner circumferential surface of the heat exchanger shell, and the vertical plate is fixedly connected to the stop iron.

[0005] Furthermore, the arc-shaped elastic baffle is composed of multiple layers of arc-shaped pressing sheets riveted together.

[0006] Furthermore, the arc-shaped elastic baffle 1 is fixed on the vertical plate by rivets.

[0007] Furthermore, the radial cross section of the stopper is L-shaped.

[0008] Compared with the prior art, the utility model has positive and obvious effects: the anti-bypass flow device in a plate and shell heat exchanger of the utility model prevents the bypass flow of cold fluid through an arc-shaped elastic baffle, thereby improving the heat exchange efficiency and effectively reducing the space occupied by the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a schematic structural diagram of a bypass flow prevention device in a plate and shell heat exchanger. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the embodiments, and any similar structure and similar changes of the present invention should be included in the protection scope of the present invention.

[0011] Figure 1 A detail of a radial cross section of a plate and shell heat exchanger is shown.

[0012] like Figure 1As shown, a bypass flow prevention device in a plate and shell heat exchanger of the present embodiment comprises a heat exchanger shell 2 and a heat exchange plate unit 6, wherein the heat exchange plate unit 6 is coaxially arranged in the heat exchanger shell 2, and two bypass flow blocking structures are arranged between the inner circumference of the heat exchanger shell 2 and the outer circumference of the heat exchange plate unit 6, wherein the two bypass flow blocking structures are respectively arranged at the two ends of a diameter of the heat exchanger shell 2, and any one of the bypass flow blocking structures comprises a vertical plate 3 and an arc-shaped elastic baffle 1, and at any one of the bypass flow blocking structures In the structure, the vertical plate 3 is fixedly connected to the outer circumference of the heat exchange plate unit and is arranged along the radial direction of the heat exchange plate unit 6, and extends from one end of the heat exchanger shell 2 to the other end of the heat exchanger shell 2. The arc-shaped elastic baffle 1 also extends from one end of the heat exchanger shell 2 to the other end of the heat exchanger shell 2. One side of the arc-shaped elastic baffle 1 is fixedly connected to one side of the vertical plate 3, and the other side of the arc-shaped elastic baffle 1 is offset on the inner circumferential surface of the heat exchanger shell 2. A stop iron 4 is fixedly arranged on the inner circumferential surface of the heat exchanger shell 2, and the vertical plate 3 is fixedly connected to the stop iron 4.

[0013] Furthermore, the arc-shaped elastic baffle 1 is composed of multiple layers of arc-shaped pressing sheets riveted together.

[0014] Furthermore, the arc-shaped elastic baffle 1 is fixed on the vertical plate 3 by rivets.

[0015] Furthermore, the radial cross section of the stopper 4 is L-shaped.

[0016] Specifically, the arc-shaped pressing sheet and the like in this embodiment all adopt the well-known solutions in the prior art, which are well known to those skilled in the art and will not be described in detail here.

[0017] The working principle of this embodiment is as follows: when the cold fluid entering the heat exchanger shell 2 flows along the K direction, it flows toward the arc-shaped elastic baffle 1. Under the action of the force of the cold fluid flow, the arc-shaped elastic baffle 1 will fit tightly against the inner circumferential surface of the heat exchanger shell 2, thereby blocking the cold fluid from flowing in and causing the cold fluid to flow toward the heat exchange plate unit 6, thereby preventing the generation of bypass flow, thereby forcing the cold fluid to flow through the heat exchange plate unit 6 for heat exchange, thereby enhancing the heat exchange effect.

[0018] Compared with the prior art, the utility model has positive and obvious effects: the anti-bypass flow device in a plate and shell heat exchanger of the utility model prevents the cold fluid from bypassing through the arc-shaped elastic baffle 1, thereby improving the heat exchange efficiency and effectively reducing the space occupied by the heat exchanger.

Claims

1. A bypass flow prevention device in a plate and shell heat exchanger, comprising a heat exchanger shell and a heat exchange plate unit, wherein the heat exchange plate unit is coaxially arranged in the heat exchanger shell, and is characterized in that: Two bypass flow blocking structures are arranged between the inner circumference of the heat exchanger shell and the outer circumference of the heat exchanger plate unit. The two bypass flow blocking structures are respectively arranged at the two ends of a diameter of the heat exchanger shell. Any one of the bypass flow blocking structures each includes a vertical plate and an arc-shaped elastic baffle. In any one of the bypass flow blocking structures, the vertical plate is fixedly connected to the outer circumference of the heat exchanger plate unit and is arranged along the radial direction of the heat exchanger plate unit, and extends from one end of the heat exchanger shell to the other end of the heat exchanger shell. The arc-shaped elastic baffle also extends from one end of the heat exchanger shell to the other end of the heat exchanger shell. One side of the arc-shaped elastic baffle is fixedly connected to one side of the vertical plate, and the other side of the arc-shaped elastic baffle is offset on the inner circumference of the heat exchanger shell. A stop iron is fixedly arranged in the inner circumference of the heat exchanger shell, and the vertical plate is fixedly connected to the stop iron.

2. The bypass flow prevention device in a plate and shell heat exchanger according to claim 1, characterized in that: The arc-shaped elastic baffle is composed of multiple layers of arc-shaped pressing sheets riveted together.

3. The bypass flow prevention device in a plate and shell heat exchanger according to claim 1, characterized in that: The arc-shaped elastic baffle is fixed on the vertical plate by rivets.

4. The bypass flow prevention device in a plate and shell heat exchanger according to claim 1, characterized in that: The radial cross section of the stopper is L-shaped.

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