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CN-121993101-A - Combined heat exchanger matched with crude oil heating heat pump device

CN121993101ACN 121993101 ACN121993101 ACN 121993101ACN-121993101-A

Abstract

The invention discloses a combined heat exchanger matched with a crude oil heating heat pump device, and belongs to the field of heat pumps and heat exchange. The combined heat exchanger comprises a condenser, a wrapped flexible electric heating component and a phase-change heat storage component, wherein the wrapped flexible electric heating component is wrapped outside the condenser, the wrapped flexible electric heating component is connected with a power supply, the condenser comprises a refrigerant channel and a crude oil channel, the phase-change heat storage component comprises the refrigerant channel and the crude oil channel, the condenser refrigerant channel is communicated with the phase-change heat storage component, and the condenser crude oil channel is communicated with the phase-change heat storage component crude oil channel. The invention integrates the three functions of the condenser, the wrapped flexible electric heating component and the phase change heat storage component, greatly simplifies the whole structure, and has obvious technical advantages in the aspects of heat exchange efficiency, scale prevention treatment, system defrosting, energy efficiency improvement and the like.

Inventors

  • ZHANG QIAN
  • FENG JIANSHE
  • WANG LINPING
  • XU WENLONG
  • XU ZIQIANG
  • ZHANG XUAN
  • SHI LEI
  • QIN CHUAN
  • WEI LIJUN
  • WANG MAN

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (10)

  1. 1. The combined heat exchanger matched with the crude oil heating heat pump device is characterized by comprising a condenser (1), a wrapped flexible electric heating component (2) and a phase change heat storage component (3); the wrapped flexible electric heating component (2) is wrapped outside the condenser (1), the wrapped flexible electric heating component (2) is connected with a power supply, the condenser (1) comprises a refrigerant channel and a crude oil channel, the phase-change heat storage component (3) comprises the refrigerant channel and the crude oil channel, the refrigerant channel of the condenser (1) is communicated with the refrigerant channel of the phase-change heat storage component (3), and the crude oil channel of the condenser (1) is communicated with the crude oil channel of the phase-change heat storage component (3).
  2. 2. The combined heat exchanger for matching the crude oil heating heat pump device according to claim 1 is characterized in that a refrigerant channel of the condenser (1) comprises a plurality of inner pipes (101), the inner pipes (101) are arranged in parallel, adjacent inner pipes (101) are connected through elbows (105), the elbows (105) are alternately arranged at two ends of the inner pipes (101), connecting pipes (104) and sealing gaskets are arranged at the connecting positions of the elbows (105) and the inner pipes (101), one end of the refrigerant channel of the condenser (1) is a first refrigerant inlet (106), the other end of the refrigerant channel of the condenser (1) is a first refrigerant outlet (107), the first refrigerant inlet (106) is communicated with the refrigerant channel of the phase change heat storage component (3), and the first refrigerant outlet (107) is connected with an external refrigerant pipeline.
  3. 3. The combined heat exchanger for matching a crude oil heating heat pump device according to claim 2, wherein the crude oil channel of the condenser (1) comprises sleeves (102), the sleeves (102) are sleeved outside the inner tube (101), sealing plates (103) are coaxially arranged at two ends of each sleeve (102), adjacent sleeves (102) are communicated through pipelines which are alternately arranged near two ends of each sleeve (2), a first discharging pipe (109) is arranged at one end of each sleeve (102) near a first refrigerant inlet (106), a first feeding pipe (108) is arranged at one end of each sleeve (102) near a first refrigerant outlet (107), the first discharging pipe (109) is communicated with the crude oil channel of the phase-change heat storage component (3) through a pipeline, and the first feeding pipe (108) is connected with an external crude oil pipeline.
  4. 4. A combined heat exchanger for a crude oil heating heat pump apparatus according to claim 3, wherein the inner surface of the sleeve (102), the inner tube (101) and the outer surface of the elbow (105) are all subjected to a hydrophobic coating treatment.
  5. 5. A combined heat exchanger for a crude oil heating heat pump apparatus according to claim 3, wherein the crude oil passage of the phase change heat storage member (3) comprises a second spiral pipe (302), one end of the second spiral pipe (302) is connected to a second feed pipe (308), the other end is connected to a second discharge pipe (309), the second feed pipe (308) is connected to a first discharge pipe (109) of the refrigerant condenser (1), and the second discharge pipe (309) is connected to an external crude oil pipe.
  6. 6. A combined heat exchanger for a crude oil heating heat pump apparatus according to claim 3, wherein the refrigerant passage of the phase change heat storage member (3) comprises a first spiral pipe (301), one end of the first spiral pipe (301) is connected to a second refrigerant inlet (306), the other end is connected to a second refrigerant outlet (307), the second refrigerant outlet (307) is connected to a first refrigerant inlet (106) of the condenser, and the second refrigerant inlet (306) is connected to an external refrigerant pipe.
  7. 7. A combined heat exchanger for a crude oil heating heat pump apparatus according to claim 5 or 6, wherein the first spiral pipe (301) and the second spiral pipe (302) are wound around each other and are simultaneously disposed in a cylindrical cavity formed by the inner sleeve (303) and the outer sleeve (304), and the phase change heat storage material is stored in the cylindrical cavity.
  8. 8. The combined heat exchanger for a crude oil heating heat pump apparatus according to claim 7, wherein the outer side of the outer sleeve (304) and the inner side of the inner sleeve (303) are both wrapped with heat insulation layers.
  9. 9. The combined heat exchanger for matching the crude oil heating heat pump device according to claim 1 is characterized in that the wrapped flexible electric heating component (2) comprises a heating layer (201), current-carrying electrodes (202) are arranged at two ends of the heating layer (201), a waterproof layer (203) is wrapped outside the heating layer (201), an insulating layer (204) is wrapped outside the waterproof layer (203), and the current-carrying electrodes (202) are connected with a power supply.
  10. 10. The combined heat exchanger for matching a crude oil heating heat pump device according to claim 9, wherein the heating layer (201) is a graphene electric heating film.

Description

Combined heat exchanger matched with crude oil heating heat pump device Technical Field The invention belongs to the technical field of heat pumps and heat exchange, and particularly relates to a combined heat exchanger matched with a crude oil heating heat pump device. Background The waxy content in crude oil extracted from a plurality of domestic oil fields is generally higher, and the freezing point is higher. Especially in winter in north, in the crude oil outward transportation process of well sites, the temperature of the crude oil is rapidly reduced due to the heat dissipation effect of the pipeline, so that wax, colloid, asphaltene, sand grains and other mechanical impurities in the crude oil are deposited on the inner wall of the pipeline, and the phenomenon of wax deposition on the pipe wall is formed, so that the transportation safety and the transportation capacity of the pipeline are seriously affected. Therefore, the northern oil extraction well site generally needs to heat and then output the produced liquid in winter. In various technical schemes of heating crude oil at well sites, the air source heat pump heating device is a technical means developed in recent years, and has remarkable energy-saving and environment-friendly advantages compared with other heating technologies. The air source heat pump is an energy-saving heating device widely used at present, is widely applied to the fields of domestic hot water preparation and heating, but is used for heating produced liquid in a well site, and can be used only by aiming at solving some special requirements for heating crude oil in the well site. In addition, crude oil needs to be continuously heated in the whole winter, and cannot be interrupted, and an air source heat pump often needs to stop heating because of defrosting problems, and other auxiliary heating means are also needed to provide heat. Aiming at the defrosting problem of the air source heat pump, the reverse operation technology adopting the four-way valve reversing is the fastest and most commonly used method, but the heat required by defrosting is provided at the moment. Meanwhile, during defrosting of the system, the heating of crude oil cannot be interrupted, so that heat is also required to supply the crude oil for continuous heating. To solve this problem, a phase change thermal storage medium may be used to store a portion of the heat for defrosting during normal operation of the system and to provide a portion of the heat source for heating the crude oil during defrosting. The residual heat supply gap during defrosting can be compensated by an electric heating means. How to efficiently realize efficient, coupled and cooperative heat exchange among the refrigerant, the crude oil, the heat storage medium and the electric heating device in the condensation process in the crude oil heating heat pump device becomes a great difficulty in the design of the crude oil heat exchanger. The smart coupling and integration of the functions are the precondition and foundation for ensuring the efficient, compact, safe and reliable operation of the heat pump device. Therefore, in the design of crude oil heating heat pump units, special attention is paid to the synergy between these functions to achieve the best heat exchange effect. Disclosure of Invention The invention aims to provide a combined heat exchanger matched with a crude oil heating heat pump device, so as to solve the problems of stable heat supply and matching of a heat pump system in normal and defrosting working modes, solve the problems of difficult heat multi-element transfer during defrosting in the crude oil heating heat pump device and difficult realization of coupling design of a multi-medium crude oil heat exchanger, and ensure the stable, safe, efficient and reliable operation of the heat pump system. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides a combined heat exchanger matched with a crude oil heating heat pump device, which comprises a condenser, a wrapped flexible electric heating component and a phase change heat storage component; The wrapped flexible electric heating component is wrapped outside the condenser, the wrapped flexible electric heating component is connected with a power supply, the condenser comprises a refrigerant channel and a crude oil channel, the phase-change heat storage component comprises the refrigerant channel and the crude oil channel, the condenser refrigerant channel is communicated with the phase-change heat storage component refrigerant channel, and the condenser crude oil channel is communicated with the phase-change heat storage component crude oil channel. The refrigerant channel of the condenser comprises a plurality of inner pipes which are arranged in parallel, the adjacent inner pipes are connected through elbows, the elbows are alternately arranged at the two ends of the inner pipes, conne