A finished acid PAF cooler

Abstract

This utility model discloses a finished acid PAF cooler, belonging to the field of heat exchanger technology; it includes a shell, an end seat, a tube sheet, and a head arranged sequentially from the inside to the outside at the end of the shell. The end seat is sealed to the end of the shell through a loose flange. The tube sheet and the head are bolted to studs provided on the end seat. The end seat and the tube sheet are made of fluoroplastic, and the shell and the head are lined with a fluoroplastic layer. This utility model, by lining the shell and the head with a fluoroplastic layer and using an end seat and tube sheet made of fluoroplastic, ensures that the liquid flow inside the cooler is all within the fluoroplastic, which can effectively block the corrosion of metal by acid, and has a lower manufacturing cost. The fluoroplastic layer has a certain thickness, making it more corrosion-resistant and less prone to damage.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically to a finished acid PAF cooler. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial production processes. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used.

[0003] Most heat exchangers are currently made of metal. In some applications, it is necessary to condense corrosive acid liquids and acid vapors. To prevent corrosion, the metal heat exchangers used often need to be coated with a corrosion-resistant metal, which is costly. Moreover, the coating is still easily corroded and damaged after it is damaged. Utility Model Content

[0004] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a finished acid PAF cooler. This application provides the following technical solution:

[0005] The device includes a housing, an end seat, a tube sheet, and a head arranged sequentially from the inside to the outside at the end of the housing. The end seat is sealed to the end of the housing via a loose flange. The tube sheet and the head are bolted to studs provided on the end seat. The end seat and the tube sheet are made of fluoroplastic. The housing and the head are lined with a fluoroplastic layer.

[0006] The shell is provided with a cooling water inlet and outlet, and a number of heat exchange tubes are installed on the tube sheet. The heat exchange tubes pass through the shell. The end cap is sealed to the tube sheet. The heat exchange tubes are connected to the end cap. The end cap is provided with a material inlet and outlet.

[0007] Several baffles are staggered inside the shell, the heat exchange tube passes through the baffles, and the baffles are connected and fixed by a support rod, one end of which is fixed to the end seat.

[0008] A fluororubber sealing gasket is provided between the tube sheet and the end seat.

[0009] A fluoroplastic sealing gasket is provided between the end cap and the tube sheet.

[0010] The stud is made of metal and one end is embedded in the end seat.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0012] The shell and heads are lined with a fluoroplastic layer, and the end seats and tube sheets are made of fluoroplastic. This ensures that the liquid flow inside the cooler is entirely within the fluoroplastic layer, effectively preventing acid corrosion of the metal. Furthermore, the manufacturing cost is lower, and the fluoroplastic layer has a certain thickness, making it more corrosion-resistant and less prone to breakage. Simultaneously, by setting end seats, which are connected and sealed to the shell using loose flanges, the tube sheets and heads are sequentially installed on the studs on the end seats. The tube sheets and heads have high coaxiality, resulting in smaller dimensional deviations after assembly. Meanwhile, the loose flanges and studs are still made of metal, ensuring the tightness of the end seat installation and the installation of the tube sheets and heads, which is comparable to the tightness of the end components in existing coolers made entirely of metal. Therefore, it combines the corrosion resistance of fluoroplastic coolers with the compactness of metal coolers.

[0013] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of an embodiment of a finished acid PAF cooler.

[0016] Figure 2 This is a partial cross-sectional view of an embodiment of a finished acid PAF cooler.

[0017] Figure 3 This is a schematic diagram of an embodiment two of a finished acid PAF cooler.

[0018] Figure 4 This is a partial cross-sectional view of Example 2 of a finished acid PAF cooler.

[0019] Reference numerals: 1. Shell; 11. Cooling water inlet / outlet; 2. End seat; 21. Stud; 22. Support rod; 3. Tube sheet; 31. Heat exchange tube; 4. End cap; 41. Material inlet / outlet; 5. Baffle plate; 6. Fluororubber gasket; 7. Fluoroplastic gasket; 8. Loose flange. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] Please refer to Figure 1-4 As shown, this utility model provides a finished acid PAF cooler, which includes a shell 1, an end seat 2, a tube sheet 3, and a head 4 arranged sequentially from the inside to the outside at the end of the shell 1. The end seat 2 is sealed to the end of the shell 1 through a loose flange 8. The tube sheet 3 and the head 4 are bolted to the studs 21 provided on the end seat 2. The end seat 2 and the tube sheet 3 are made of fluoroplastic, and the shell 1 and the head 4 are lined with a fluoroplastic layer.

[0024] The shell 1 is provided with a cooling water inlet / outlet 11, and a number of heat exchange tubes 31 are installed on the tube sheet 3. The heat exchange tubes 31 are inserted into the shell 1. The end cap 4 is sealed with the tube sheet 3. The heat exchange tubes 31 are connected to the end cap 4. The end cap 4 is provided with a material inlet / outlet 41.

[0025] Several baffles 5 are staggered inside the shell 1. The heat exchange tube 31 passes through the baffles 5. The baffles 5 are connected and fixed by the support rod 22. That is, the baffles 5 are fixed on the support rod 22. The baffles 5 have through holes, and the heat exchange tube 31 passes through the through holes. One end of the support rod 22 is fixed to the end seat 2.

[0026] A fluororubber sealing gasket 6 is provided between the tube sheet 3 and the end seat 2.

[0027] A fluoroplastic sealing gasket 7 is provided between the end cap 4 and the tube sheet 3.

[0028] The stud 21 is made of metal and one end is embedded in the end seat 2.

[0029] For details, please refer to Figure 1-2 As shown, this is an embodiment of the present invention. The cooler is a fixed tube sheet type shell and tube heat exchanger. Both ends of the shell 1 have end seats 2, tube sheets 3, and end caps 4. The interiors of the end caps 4 on both sides are connected to the interiors of the heat exchange tubes 31 on the tube sheet 3. The material enters the end cap 4 from the material inlet / outlet 41 on one side of the end cap 4, flows through the heat exchange tubes 31 to the other side of the end cap 4, and exits from the material inlet / outlet 41 on the other side of the end cap 4. When the material passes through the heat exchange tubes 31, cooling water enters from the cooling water inlet / outlet 11 at one end of the shell 1, flows from one end to the other inside the shell 1, and flows through the baffle 5 to bend and twist, and then flows out from the cooling water inlet / outlet 11 at the other end. The material in the heat exchange tubes 31 exchanges heat with the cooling water to achieve cooling.

[0030] For details, please refer to Figure 3-4 As shown, this is Embodiment 2 of the present invention. The cooler is a U-shaped tube-and-shell heat exchanger; only one end of the shell 1 has an end seat 2, a tube sheet 3, and a head 4; the heat exchange tubes 3 on the tube sheet 3 are bent inside the shell 1 and then connected back to the tube sheet 3, and the tube sheet 3 also has material inlet and outlet ports. One end of all the heat exchange tubes 3 is connected to one of the material inlet and outlet ports, and the other end of all the heat exchange tubes 3 is connected to the other material inlet and outlet port. The material inlet and outlet ports are also equipped with sealing rings. The end of the head 4 near the tube sheet 3 has a corresponding end cap. After the end cap 4 and tube sheet 3 are both installed on the stud 21, the end cap 4 is close to the tube sheet 3, and the material inlet and outlet ports are sealed and connected to the interface. The interface is connected to different material inlets and outlets 41 respectively, without interfering with each other. The material enters the end cap 4 from one of the material inlets and outlets 41, and enters one end of the heat exchange tube 3 through the material inlet and outlet ports. It is then output from the other end through the heat exchange tube 3, and enters the end cap 4 through another material inlet and outlet port, and is output from another material inlet and outlet 41. When the material flows through the heat exchange tube 31, it exchanges heat with the cooling water to achieve cooling.

[0031] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A finished acid PAF cooler characterized by: The device includes a housing (1), an end seat (2), a tube sheet (3), and a head (4) arranged sequentially from the inside to the outside at the end of the housing (1). The end seat (2) is sealed to the end of the housing (1) by a loose flange (8). The tube sheet (3) and the head (4) are bolted to the studs (21) provided on the end seat (2). The end seat (2) and the tube sheet (3) are made of fluoroplastic. The housing (1) and the head (4) are lined with a fluoroplastic layer.

2. A finished acid PAF cooler as claimed in claim 1 characterized by: The shell (1) is provided with a cooling water inlet and outlet (11), and a plurality of heat exchange tubes (31) are installed on the tube sheet (3). The heat exchange tubes (31) are inserted into the shell (1), the end cap (4) is sealed to the tube sheet (3), the heat exchange tubes (31) are connected to the end cap (4), and the end cap (4) is provided with a material inlet and outlet (41).

3. A finished acid PAF cooler as claimed in claim 2, characterized by: Several baffles (5) are staggered inside the shell (1). The heat exchange tube (31) passes through the baffles (5). The baffles (5) are connected and fixed by a support rod (22). One end of the support rod (22) is fixed to the end seat (2).

4. A finished acid PAF cooler as claimed in claim 1 characterized by: A fluororubber sealing gasket (6) is provided between the tube sheet (3) and the end seat (2).

5. A finished acid PAF cooler as claimed in claim 2, characterized by: A fluoroplastic gasket (7) is provided between the end cap (4) and the tube sheet (3).

6. A finished acid PAF cooler as described in claim 1, characterized in that: The stud (21) is made of metal and one end is embedded in the end seat (2).

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