CN218155672U - Multi-flow fixed tube plate heat exchanger - Google Patents

Abstract

The utility model discloses a fixed tube sheet heat exchanger of stranded flow. The heat exchange tube comprises a shell pass cavity which is formed in the middle of a tube box and is internally provided with a heat exchange tube, and a tube pass inlet cavity and a tube pass outlet cavity which are formed in the tube box and are positioned at two ends of the shell pass cavity, wherein the tube box is provided with a shell pass inlet and a shell pass outlet which are communicated with the shell pass cavity, the tube pass inlet cavity is at least divided into two inlet branch areas, the tube pass outlet cavity is at least divided into two outlet branch areas, and each inlet branch area and each outlet branch area are respectively communicated with the corresponding heat exchange tube. After the structure is adopted, the flow entering the inlet split-pass area can be controlled, the tube side medium flows through the heat exchange tube and the shell side medium to realize heat exchange of various media, finally flows into the other side tube box outflow device, the shell side medium enters the shell side from one side of the tube side medium outflow, the flowing direction is repeatedly turned back in the shell side through the blocking of the baffle plate in the shell side, the flowing stroke of the shell side medium is increased, and the heat exchange of the medium inside and outside the heat exchange tube is more sufficient.

Description

Multi-flow fixed tube plate heat exchanger

Technical Field

The utility model relates to a chemical industry equipment, specifically speaking are fixed tube sheet heat exchanger of stranded flow.

Background

The fixed tube plate heat exchanger is a dividing wall type heat exchanger which takes the wall surface of a tube bundle sealed in a shell as a heat transfer surface; the heat exchanger has simple structure, low cost, wider flow cross section and easy scale cleaning; can be made of various structural materials (mainly metal materials), and is the most widely applied type at present.

At present, a common fixed tube plate heat exchanger generally circulates one medium through a tube pass, another medium circulates through a shell pass, and the heat exchange function is realized due to different temperatures of the media in the tube pass and the shell pass, but the heat exchange working conditions of various media need to be related in some special fields, and the conventional fixed tube plate heat exchanger cannot be realized.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a can realize the condition of multiple medium heat transfer and the abundant fixed tube sheet heat exchanger of stranded flow of heat transfer.

In order to solve the technical problem, the utility model discloses a fixed tube sheet heat exchanger of multithread flow, including the built-in shell side chamber that has the heat exchange tube that is located the pipe case middle part that forms in the pipe case and be located a tube side import chamber and a tube side outlet chamber at shell side chamber both ends, be provided with on the pipe case with the communicating shell side entry in shell side chamber and the export of shell side, the tube side import chamber is separated for two import branches at least regionally, the tube side outlet chamber is separated for two exports branches region at least, each import branch is regional with each export branch regional respectively with the heat exchange tube that corresponds communicate with each other.

An inner cavity of the tube box is divided into a shell pass cavity, a tube pass inlet cavity and a tube pass outlet cavity which are positioned at two ends of the shell pass cavity by two tube plates in the tube box, and the heat exchange tubes are supported and installed between the two tube plates.

Each inlet split-range area is formed by separating an inlet split-range partition plate arranged in a tube pass inlet cavity, and each outlet split-range area is formed by separating an outlet split-range partition plate arranged in a tube pass outlet cavity.

And an expansion joint arranged in the middle of the shell pass cavity is arranged on the tube box.

And a baffle plate supported on the heat exchange tube is arranged in the shell pass cavity.

The shell-side inlet and the shell-side outlet are arranged in a staggered mode, the shell-side inlet is located on one side of the tube-side outlet cavity, and the shell-side outlet is located on one side of the tube-side inlet cavity.

And the tube box is provided with a base positioned at the bottom of the shell pass cavity.

After the structure is adopted, different tube side media enter the tube side inlet cavity, the multiple inlet branch areas are separated through the tube side inlet cavity, the inlet branch area proportion of the tube box is divided according to the heat transfer quantity of actual needs, the flow entering the inlet branch areas can be controlled, the tube side media flow through the heat exchange tube and the shell side media to realize multiple media heat exchange, finally flow into the tube box on the other side and flow out of the device, the shell side media enter the shell side from one side where the tube side media flow out, the flowing direction is turned back for multiple times in the shell side through the blocking of the baffle plates in the shell side, the flowing stroke of the shell side media is increased, and the heat exchange of the media inside and outside the heat exchange tube is more sufficient.

Drawings

FIG. 1 is a schematic structural view of a multi-flow fixed tube plate heat exchanger according to the present invention;

fig. 2 is a schematic view of a welding structure of the heat exchange tube and the tube plate.

Detailed Description

The multi-flow fixed tube plate heat exchanger of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

As shown in the figures, the utility model discloses a fixed tube sheet heat exchanger of multiple strand flow, including pipe case and two tube sheets that set up in the pipe case, support between two tube sheets and install heat exchange tube 6 and form the shell side chamber that is located the pipe case middle part, be provided with the base that is located shell side chamber bottom on the pipe case, be provided with shell side entry 8 and shell side export 9 that communicate with shell side chamber 4 on the pipe case, shell side entry 8 and shell side export 9 stagger arrangement each other and shell side entry is located tube side outlet chamber one side, and shell side export is located tube side inlet chamber one side, make shell side medium flow in from shell side entry 8 from this, flow out from shell side export 9, the flow direction of shell side medium is opposite with the flow direction of tube side medium; in the embodiment, the tube pass inlet cavity is divided into two independent inlet split areas (a first inlet split area 1-1 and a second inlet split area 1-2 shown in figure 1) through an inlet split partition, the tube pass outlet cavity is divided into two independent outlet split areas (a first outlet split area 7-1 and a second outlet split area 7-2 shown in figure 1) through an outlet split partition, the heat exchange tubes are provided with multiple groups, and each inlet split area and each outlet split area are respectively communicated with the heat exchange tubes corresponding to the groups of positions, so that the tube pass can simultaneously enter two media to exchange heat with the shell pass media.

Furthermore, an expansion joint 5 arranged in the middle of the shell side cavity 4 is arranged on the tube box to offset the temperature difference stress of the equipment; in addition, the tube plate 3 and the heat exchange tube 6 are in a welded structure, the heat exchange tube is provided with an expansion joint structure matched with the tube plate, and welded structures are also arranged between the inlet split-pass partition plate and the tube box and between the outlet split-pass partition plate and the tube box, so that not only can medium leakage be effectively avoided, but also vibration during the operation of equipment can be reduced.

When the heat exchanger is used, the inlet split-pass partition plate 2 is arranged in the tube pass inlet cavity of the tube box, so that the tube box is divided into two or more independent inlet split-pass areas, each area corresponds to one inlet pipeline, different media can be injected through different inlet pipelines and respectively injected into different tube box areas (a first inlet split-pass area 1-1 and a second inlet split-pass area 1-2), the different media complete heat transfer with a shell pass medium through the heat exchange tube 6 under the action of pressure, and finally the tube pass medium reaches the tube box on the other side and flows out of a first outlet split-pass area 7-1 and a second outlet split-pass area 7-2 in the tube pass outlet cavity.

Claims (7)

1. The utility model provides a fixed tube sheet heat exchanger of multithread flow, is located shell side chamber (4) that the built-in heat exchange tube (6) that have of pipe case middle part and be located a tube side import chamber and a tube side export chamber at shell side chamber (4) both ends that form including the pipe incasement, its characterized in that: the tube box is provided with a shell pass inlet (8) and a shell pass outlet (9) which are communicated with a shell pass cavity (4), the tube pass inlet cavity is at least divided into two inlet branch pass areas, the tube pass outlet cavity is at least divided into two outlet branch pass areas, and each inlet branch pass area and each outlet branch pass area are respectively communicated with a corresponding heat exchange tube (6).

2. The multiple flow fixed tube sheet heat exchanger of claim 1, wherein: the tube box is internally divided into a shell pass cavity (4) and a tube pass inlet cavity and a tube pass outlet cavity which are positioned at two ends of the shell pass cavity through two tube plates (3), and the heat exchange tube (6) is supported and arranged between the two tube plates (3).

3. The multiple flow fixed tube sheet heat exchanger of claim 1 or 2, wherein: each inlet split-range area is formed by separating an inlet split-range partition plate (2) arranged in a tube pass inlet cavity, and each outlet split-range area is formed by separating an outlet split-range partition plate arranged in a tube pass outlet cavity.

4. The multi-flow fixed tube sheet heat exchanger of claim 3, wherein: and an expansion joint (5) arranged in the middle of the shell side cavity (4) is arranged on the tube box.

5. The multiple flow fixed tube sheet heat exchanger of claim 1, 2 or 4, wherein: and a baffle plate (10) supported on the heat exchange tube is arranged in the shell side cavity (4).

6. The multi-flow fixed tube sheet heat exchanger of claim 5, wherein: the shell-side inlet and the shell-side outlet are arranged in a staggered mode, the shell-side inlet is located on one side of the tube-side outlet cavity, and the shell-side outlet is located on one side of the tube-side inlet cavity.

7. The multi-flow fixed tube sheet heat exchanger of claim 6, wherein: and a base arranged at the bottom of the shell pass cavity is arranged on the tube box.

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