Ultrasonic winding pipe heat exchanger

Abstract

The utility model discloses an ultrasonic wave winding pipe heat exchanger which comprises two heat exchanger assemblies, the two heat exchanger assemblies are in butt joint through a transition section, the transition section comprises a pipe plate a and a pipe plate b which are arranged in parallel, the pipe plate a and the pipe plate b are both circular, and a plurality of flow channels penetrating in the axial direction are arranged between the pipe plate a and the pipe plate b. A plurality of transducers are radially mounted on the outer side of the transition section along the circumference; the heat exchanger assembly comprises a cylindrical shell and a plurality of heat transfer pipes, the heat transfer pipes are located in an inner cavity of the shell and connected between the two ends of the shell, an axial center pipe is arranged in the middle of the shell, a winding part is arranged in the middle of each heat transfer pipe and spirally wound along the center pipe, and the side faces of the two ends of the shell are each provided with a cold side medium connector communicated with the inner cavity. The two adjacent cold side medium connectors of the two heat exchanger assemblies are communicated through a connecting pipe. The winding pipe heat exchanger is a two-section type winding pipe heat exchanger, ultrasonic waves are used for generating oscillation at the transition positions of the two ends to strengthen flowing of media in the pipe, and crystallization and condensation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to an ultrasonic wound tube heat exchanger. Background Art

[0002] The wound tube heat exchanger has a wide applicable temperature range, is adaptable to thermal shock, can eliminate thermal stress by itself, and has a very high compactness. Due to its special structure, its flow field is fully developed and there is no dead zone. The most special thing is that by setting up multiple tube passes (single shell pass), it can meet the simultaneous heat exchange of multiple fluids in one device. It is widely used in fertilizer, air separation, LNG liquefaction and other devices, and its application in hydrogenation devices has gradually increased in recent years. Ammonium chloride and ammonium hydrogen sulfide in the hydrogenation reaction product will form crystals in the low-temperature section inside the heat exchanger. Due to the complex structure of the existing wound tube heat exchanger, it cannot be cleaned online. Once ammonium salt crystals are generated inside, it is easy to reduce the heat exchange efficiency, increase the system pressure drop, increase the energy consumption of the device, and even be forced to stop working, which is not conducive to the safe and stable operation of the device and increases the production cost. In the prior art, there are also heat exchangers that are easy to clean and maintain, such as the prior public patents with publication numbers CN111912253 A and CN217979916U, but they all need to stop the equipment during the cleaning process and can only resume operation after the cleaning is completed, which has certain limitations. Utility Model Content

[0003] The purpose of the utility model is to provide an ultrasonic wound tube heat exchanger to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultrasonic wound tube heat exchanger, comprising a heat exchanger assembly, wherein the heat exchanger assembly is provided with two and the two are butt-jointed via a transition section, wherein the transition section comprises a tube sheet a and a tube sheet b arranged in parallel, wherein the tube sheet a and the tube sheet b are both circular and a plurality of axially penetrating flow channels are arranged between the two, and the flow channels are evenly arranged in a circular array, and a plurality of transducers are installed radially along the circumference on the outer side of the transition section, and the transducers are used to ultrasonically vibrate the heat medium flowing in the flow channel to prevent condensation;

[0005] The heat exchanger assembly includes a cylindrical shell and a plurality of heat transfer tubes, wherein the heat transfer tubes are located in the inner cavity of the shell and connected between the two ends of the shell, an axial central tube is provided in the middle of the shell, and the heat transfer tubes have a winding portion spirally wound along the central tube in the middle, and the heat transfer tubes are connected one by one with the flow channels in the transition section, and cold side medium interfaces communicating with the inner cavity are respectively provided on the side surfaces at both ends of the shell, and two adjacent cold side medium interfaces of two heat exchanger assemblies are connected through a connecting pipe.

[0006] Preferably, an annular junction box and an ultrasonic controller are fixedly installed on the outer side of the transition section, and the transducer is electrically connected to the ultrasonic controller through the junction box.

[0007] Preferably, a buffer port is fixedly connected to the outer end of the shell, one end of the heat transfer pipe is connected to the buffer port, and a hot side medium interface is provided at the outer end of the buffer port.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the utility model is a two-stage wound tube heat exchanger, which uses ultrasonic waves to generate vibrations at the transition points at both ends to strengthen the flow of the medium in the tube, avoid crystallization and condensation, and enable it to better complete the next stage of heat exchange, avoid clogging of the heat exchange tube during the heat exchange process to affect the use of the product, avoid clogging from the root of the product, and the design of the transition section is also convenient for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the main structure of the transition section of the utility model;

[0011] Figure 3 It is a schematic diagram of the top view structure of the transition section of the utility model.

[0012] In the figure: 1. Shell; 2. Buffer port; 3. Hot side medium interface; 4. Center tube; 5. Heat transfer tube; 6. Winding part; 7. Connecting tube; 8. Cold side medium interface; 9. Transition section; 91. Tube sheet a; 92. Tube sheet b; 10. Ultrasonic controller; 11. Junction box; 12. Transducer. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0014] See also Figure 1-3The utility model provides a technical solution: an ultrasonic wound tube heat exchanger, including a heat exchanger assembly, the heat exchanger assembly is provided with two and the two are connected by a transition section 9, the transition section 9 includes a tube sheet a91 and a tube sheet b92 arranged in parallel, the tube sheet a91 and the tube sheet b92 are both circular and a plurality of axially penetrating flow channels are arranged between the two, and the flow channels are evenly arranged in a circular array, and a plurality of transducers 12 (the transducer 12 is an existing mature product) are installed radially along the circumference of the outer side of the transition section 9, and the transducer 12 is used to ultrasonically oscillate the heat medium flowing in the flow channel to prevent condensation, and an annular junction box 11 and an ultrasonic controller 10 are fixedly installed on the outer side of the transition section 9, and the transducer 12 is electrically connected to the ultrasonic controller 10 through the junction box 11, and the ultrasonic controller 10 controls the operation of the transducer 12.

[0015] The heat exchanger assembly includes a cylindrical shell 1 and a plurality of heat transfer tubes 5. The heat transfer tubes 5 are located in the inner cavity of the shell 1 and connected between the two ends of the shell 1. An axial central tube 4 is provided in the middle of the shell 1. The heat transfer tube 5 has a winding portion 6 spirally wound along the central tube 4 in the middle. The heat transfer tubes 5 are connected to the flow channels in the transition section 9 one by one. The tube bundle of the heat transfer tubes 5 forms a spindle structure with a large middle and small ends. The two ends of the shell 1 are provided with cold side medium interfaces 8 connected to the inner cavity. The two adjacent cold side medium interfaces 8 of the two heat exchanger assemblies are connected through a connecting pipe 7. The cold side medium interfaces 8 are connected to the refrigerant, which flows outside the heat transfer tube 5 for heat exchange. The outer end of the shell 1 is fixedly connected with a buffer port 2. One end of the heat transfer tube 5 is connected to the buffer port 2. The outer end of the buffer port 2 is provided with a hot side medium interface 3.

[0016] Working principle: The utility model includes two heat exchanger components, which are connected between opposite ends by a transition section 9. A plurality of transducers 12 are installed on the transition section 9. When the transducers 12 are turned on, ultrasonic vibrations are generated to strengthen the flow of the medium in the tube to avoid crystallization and condensation.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic wound tube heat exchanger, comprising a heat exchanger assembly, characterized in that: The heat exchanger assembly is provided with two tube sheets a (9) and the two tube sheets b (92) are connected to each other via a transition section (9), the transition section (9) comprises a tube sheet a (91) and a tube sheet b (92) arranged in parallel, the tube sheet a (91) and the tube sheet b (92) are both circular and a plurality of axially penetrating flow channels are arranged between the two tube sheets, the flow channels are evenly arranged in a circular array, a plurality of transducers (12) are installed radially along the circumference of the outer side of the transition section (9), and the transducers (12) are used to ultrasonically vibrate the heat medium flowing in the flow channel to prevent condensation; The heat exchanger assembly comprises a cylindrical shell (1) and a plurality of heat transfer tubes (5), wherein the heat transfer tubes (5) are located in the inner cavity of the shell (1) and connected between the two ends of the shell (1), an axial central tube (4) is provided in the middle of the shell (1), a winding portion (6) of the heat transfer tube (5) is spirally wound along the central tube (4) in the middle, the heat transfer tube (5) is connected one by one with the flow channel in the transition section (9), and cold side medium interfaces (8) communicating with the inner cavity are respectively provided on the side surfaces of the two ends of the shell (1), and two adjacent cold side medium interfaces (8) of the two heat exchanger assemblies are connected via a connecting pipe (7).

2. The ultrasonic wound tube heat exchanger according to claim 1, characterized in that: An annular junction box (11) and an ultrasonic controller (10) are fixedly mounted on the outer side of the transition section (9), and the transducer (12) is electrically connected to the ultrasonic controller (10) via the junction box (11).

3. The ultrasonic wound tube heat exchanger according to claim 1, characterized in that: The outer end of the shell (1) is fixedly connected with a buffer port (2), one end of the heat transfer pipe (5) is connected to the buffer port (2), and the outer end of the buffer port (2) is provided with a hot side medium interface (3).

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