Winding pipe type oxidation reactor

Abstract

A winding pipe type oxidation reactor comprises at least two winding pipe type heat exchangers which are sequentially arranged side by side; a short section is arranged between every two adjacent winding pipe type heat exchangers, the interiors of the short sections are hollow so as to be communicated with the tube passes of the corresponding two adjacent winding pipe type heat exchangers, and meanwhile independent channels are arranged in the short sections so as to be communicated with the shell passes of the corresponding two adjacent winding pipe type heat exchangers. The first heat exchanger in the winding pipe type heat exchangers arranged side by side is provided with a pipe pass inlet connecting pipe for inputting a reaction medium, the last heat exchanger is provided with a pipe pass outlet connecting pipe, and the first heat exchanger and the last heat exchanger are alternatively provided with a shell pass inlet connecting pipe and a shell pass outlet connecting pipe for entering and exiting of a heat exchange medium respectively. During use, the heat exchange medium can exchange heat with the reaction medium in the whole process, so that the oxidation reaction can be carried out more smoothly. Meanwhile, due to the design of the pup joint, piping can be reduced, pipes and shell pass connecting pipes are arranged on the first heat exchanger and the last heat exchanger, and the technological process is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of reactors, and in particular relates to a winding tube type oxidation reactor. Background Art

[0002] The existing oxidation reactor uses multiple wound tube heat exchangers in series, and two adjacent heat exchangers are connected by pipelines exposed to the outside, and the pipelines used to transport the heat exchange medium and the pipelines used to transport the reaction medium are set independently, resulting in more and more complicated piping. In addition, since the pipelines are exposed to the outside and independent of each other, the heat exchange of the medium in the pipeline will be affected, making it impossible for the reaction medium and the heat exchange medium to exchange heat throughout the process, which will affect the reaction to a certain extent. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a winding tube type oxidation reactor capable of smoothly carrying out the reaction in view of the current status of the prior art.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a wound tube oxidation reactor, comprising:

[0005] At least two wound tube heat exchangers are arranged side by side;

[0006] Features:

[0007] A short section is provided between each two adjacent spiral wound tube heat exchangers, and the interior of the short section is hollow to connect the tube sides of the corresponding two adjacent spiral wound tube heat exchangers, and an independent channel is provided in the short section to connect the shell sides of the corresponding two adjacent spiral wound tube heat exchangers;

[0008] At the same time, the first heat exchanger in the side-by-side wound tube heat exchangers is provided with a tube side inlet pipe for inputting the reaction medium, the last heat exchanger is provided with a tube side outlet pipe, and the first heat exchanger and the last heat exchanger are respectively provided with a shell side inlet pipe and a shell side outlet pipe for inputting and outputting the heat exchange medium.

[0009] That is, the short section connects each wound tube heat exchanger in series, and the heat exchange medium alternately flows in the shell side of the heat exchanger and the independent channel of the short section. The reaction medium can alternately exchange heat with the heat exchange medium in the tube side of the heat exchanger and in the short section. Since the independent channel is located in the short section, the reaction medium can flow in an environment with the heat exchange medium throughout the process, so that the oxidation reaction can proceed more smoothly. At the same time, the design of the short section in the utility model can also reduce piping. It is sufficient to set the tube and shell side pipe on the first and last heat exchangers, simplify the process flow, and save the space occupied by the reactor.

[0010] Preferably, there are at least two independent passages in a single short section and they are arranged at intervals. Of course, there may be only one independent passage in a single short section.

[0011] Preferably, the sum of the flow areas of the cross sections of the independent channels in a single short section is greater than or equal to the flow area of ​​the shell-side inlet pipe, so that the shell-side medium can smoothly pass through the independent channels.

[0012] Furthermore, the independent channels in a single short section extend along the arrangement direction of the wound tube heat exchanger and are arranged at intervals along the circumference of the corresponding short section.

[0013] In the above scheme, in order to better control the smooth progress of the reaction, preferably, the short section is provided with a temperature measurement interface and a temperature control interface. A temperature sensor can be set at the temperature measurement interface to detect the temperature of the reaction medium in the short section; or, the temperature measurement interface can also be used as a sampling port to take out a small amount of reaction medium for temperature measurement. Similarly, a heating element can be set at the temperature control interface to control the temperature of the reaction medium; or, the temperature control interface is used as an injection port to input a small amount of medium to adjust the temperature of the reaction medium in the short section.

[0014] Thereby, the temperature of the reaction medium can be measured and controlled.

[0015] Preferably, the side wall of the independent channel is a heat-conducting wall that can conduct heat, so that the heat exchange medium can exchange heat with the reaction medium throughout the entire process.

[0016] In the above schemes, preferably, each wound tube heat exchanger is vertically arranged and arranged side by side vertically, and the wound tube heat exchanger located at the bottom is the first heat exchanger mentioned above, and the wound tube heat exchanger located at the top is the last heat exchanger mentioned above.

[0017] Furthermore, each wound tube heat exchanger comprises:

[0018] The shell-side cylinder is arranged vertically, and tube sheets are provided at both ends;

[0019] A center cylinder is axially arranged inside the shell cylinder;

[0020] The heat exchange tube is located in the shell-side cylinder and is spirally wound around the outer circumference of the central cylinder from the inside to the outside, and both ends of the heat exchange tube are supported on respective corresponding tube sheets;

[0021] The short section is vertically arranged between adjacent tube sheets of two adjacent wound tube heat exchangers, the independent channel is vertically arranged in the short section, and the end of the independent channel opens on the corresponding tube sheet and avoids the end of the heat exchange tube.

[0022] Compared with the prior art, the advantages of the utility model are: the short section connects each wound tube heat exchanger in series, the heat exchange medium alternately flows in the shell side of the heat exchanger and the independent channel of the short section, the reaction medium can alternately exchange heat with the heat exchange medium in the tube side of the heat exchanger and in the short section, and because the independent channel is located in the short section (that is, there is no exposed pipeline in the shell side, and the pipeline for conveying the heat exchange medium and the pipeline for conveying the reaction medium are not independently set), the reaction medium can flow in an environment with the heat exchange medium throughout the process, so that the oxidation reaction can proceed more smoothly. At the same time, the design of the short section in the utility model can also reduce piping, and it is sufficient to set the tube and shell side pipe on the first and last heat exchangers, simplify the process flow, and save the space occupied by the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure in the B direction. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 3 As shown, a preferred embodiment of a wound tube oxidation reactor of the utility model is shown, and the wound tube oxidation reactor includes four wound tube heat exchangers 1 and three short sections 2.

[0028] Each wound tube heat exchanger 1 is vertically arranged and arranged side by side vertically. Each wound tube heat exchanger 1 includes a shell-side cylinder 11, a center cylinder 12, a tube sheet 13 and a heat exchange tube 14. The shell-side cylinder 11 is vertically arranged, and tube sheets 13 are provided at both the upper and lower ends. The center cylinder 12 is vertically arranged in the shell-side cylinder 11. The heat exchange tube 14 is located in the shell-side cylinder 11 and is spirally wound on the outer circumference of the center cylinder 12 from the inside to the outside, and the two ends of the heat exchange tube 14 are respectively supported on the corresponding tube sheets 13. In this way, the internal space of the shell-side cylinder 11 forms the shell side of the heat exchanger, and the space inside the heat exchange tube forms the tube side of the heat exchanger.

[0029] Meanwhile, in this embodiment, the wound tube heat exchanger 1 at the bottom is the first heat exchanger, and the wound tube heat exchanger 1 at the top is the last heat exchanger. A tube side inlet pipe 3a for inputting the reaction medium and a shell side inlet pipe 4a for inputting the heat exchange medium are provided on the tube sheet at the lower side of the first heat exchanger. The tube side inlet pipe 3a is connected to the lower port of the heat exchange tube in the first heat exchanger, and the shell side inlet pipe 4a is connected to the inner space of the shell side cylinder 11 of the first heat exchanger.

[0030] A tube side outlet pipe 3b for the reaction medium to be discharged and a shell side outlet pipe 4b for the heat exchange medium to be discharged are provided on the tube sheet on the upper side of the last heat exchanger. The tube side outlet pipe 3b is connected to the upper port of the heat exchange tube in the last heat exchanger, and the shell side outlet pipe 4b is connected to the internal space of the shell side cylinder 11 of the last heat exchanger.

[0031] Each of the above-mentioned short sections 2 is hollow inside and is vertically arranged between the adjacent tube sheets 13 of each two adjacent wound tube heat exchangers 1, so that the heat exchange tubes 14 in the two adjacent wound tube heat exchangers 1 are connected. At the same time, a vertically extending independent channel 21 is provided in the short section 2. The side wall of the independent channel 21 is a heat-conducting wall that can conduct heat, and the upper and lower ends of the independent channel 21 are opened on the corresponding tube sheet 13 and avoid the end of the heat exchange tube 14, so that the shell-side cylinders 11 of the two adjacent wound tube heat exchangers 1 are connected. In this embodiment, as Figure 3 As shown, there are at least two independent channels 21 in a single short section 2, which are arranged at equal intervals along the circumferential direction. And the sum of the flow areas on the cross sections of the independent channels 21 in a single short section 2 is greater than or equal to the flow area of ​​the shell inlet pipe 4a. In addition, each short section 2 is provided with a temperature measuring interface 22 and a temperature control interface 23. A temperature sensor can be set at the temperature measuring interface 22 to detect the temperature of the reaction medium in the short section; or, the temperature measuring interface 22 can also be used as a sampling port to take out a small amount of reaction medium for temperature measurement. Similarly, a heating element can be set at the temperature control interface 23 to control the temperature of the reaction medium; or, the temperature control interface 23 is used as an injection port to input a small amount of medium to adjust the temperature of the reaction medium in the short section.

[0032] In this embodiment, the short section connects each wound tube heat exchanger in series, and the heat exchange medium alternately flows in the shell side of the heat exchanger and the independent channel 21 of the short section 2. The reaction medium can alternately exchange heat with the heat exchange medium in the tube side of the heat exchanger and in the short section 2, so that the heat exchange medium can exchange heat with the reaction medium throughout the whole process, so that the oxidation reaction can proceed more smoothly. At the same time, the design of the short section in the utility model can also reduce piping, and only tubes and shell side pipes can be set on the first and last heat exchangers, simplifying the process flow and saving the space occupied by the reactor.

Claims

1. A wound tube oxidation reactor, comprising: At least two wound tube heat exchangers (1) are arranged in parallel; Features: A short section (2) is provided between each two adjacent spiral wound tube heat exchangers (1), and the interior of the short section (2) is hollow so as to connect the tube sides of the corresponding two adjacent spiral wound tube heat exchangers (1). Meanwhile, an independent channel (21) is provided in the short section (2) so as to connect the shell sides of the corresponding two adjacent spiral wound tube heat exchangers (1); At the same time, the first heat exchanger in the wound tube heat exchangers (1) arranged side by side is provided with a tube side inlet pipe (3a) for inputting the reaction medium, the last heat exchanger is provided with a tube side outlet pipe (3b), and the first heat exchanger and the last heat exchanger are respectively provided with a shell side inlet pipe (4a) and a shell side outlet pipe (4b) for inputting and outputting the heat exchange medium.

2. The wound tube oxidation reactor according to claim 1, characterized in that: There are at least two independent channels (21) in a single short section (2), which are arranged at intervals.

3. The wound tube oxidation reactor according to claim 2, characterized in that: The sum of the flow areas of the cross sections of the independent channels (21) in a single short section (2) is greater than or equal to the flow area of ​​the shell side inlet pipe (4a).

4. The wound tube oxidation reactor according to claim 2, characterized in that: The independent channels (21) in a single short section (2) extend along the arrangement direction of the wound tube heat exchanger (1) and are arranged at intervals along the circumference of the corresponding short section (2).

5. The wound tube oxidation reactor according to claim 1, characterized in that: The short section (2) is provided with a temperature measurement interface (22) and a temperature control interface (23).

6. The wound tube oxidation reactor according to claim 1, characterized in that: The side wall of the independent channel (21) is a heat-conducting wall capable of conducting heat.

7. The wound tubular oxidation reactor according to any one of claims 1 to 6, characterized in that: Each wound tube heat exchanger (1) is arranged vertically and arranged side by side in the vertical direction, and the wound tube heat exchanger (1) located at the bottom is the first heat exchanger mentioned above, and the wound tube heat exchanger (1) located at the top is the last heat exchanger mentioned above.

8. The wound tube oxidation reactor according to claim 7, characterized in that: Each wound tube heat exchanger (1) comprises: A shell-side cylinder (11) is arranged vertically, and tube sheets (13) are provided at both ends thereof; A central cylinder (12) is axially arranged inside the shell-side cylinder (11); The heat exchange tube (14) is located in the shell-side cylinder (11) and is spirally wound from the inside to the outside around the outer circumference of the central cylinder (12), and both ends of the heat exchange tube (14) are supported on the corresponding tube sheets (13); The short section (2) is vertically arranged between adjacent tube sheets (13) of two adjacent wound tube heat exchangers (1), the independent channel (21) is vertically arranged in the short section (2), and the end of the independent channel (21) opens on the corresponding tube sheet (13) and avoids the end of the heat exchange tube (14).

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