A supercritical geothermal heat exchange device

Abstract

This utility model discloses a supercritical geothermal heat exchange device, relating to the field of heat exchange technology. It includes a main shell and a support frame. The main shell is mounted on the support frame. A front shell box and a rear shell box are respectively arranged at both ends of the main shell. Several guide pipes are horizontally arranged inside the main shell. The front shell box is connected to the rear shell box through the guide pipes. A supercritical fluid inlet is provided on the front shell box. A heat exchange medium inlet, a heat exchange medium outlet, and a supercritical fluid outlet are respectively provided on the main shell. The water pipe adopts a coiled structure wound around the guide pipes. This utility model uses supercritical fluid for heating. The supercritical fluid heats the heat exchange medium in the water pipes once through the guide pipes and then flows into the cavity of the main shell. Under the action of baffles set in the cavity, the supercritical fluid heats the heat exchange medium in the water pipes a second time, effectively improving the heat recovery of the supercritical fluid. The coiled structure of the water pipes effectively increases the heat exchange area and heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a supercritical geothermal heat exchange device. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid. Heat exchangers play a vital role in chemical, petroleum, power, food, and many other industrial production processes. In chemical production, they are widely used as heaters, coolers, condensers, evaporators, and reboilers. Due to the high energy density and high heat transfer efficiency of high-temperature supercritical fluids, the development of efficient supercritical fluid heat exchangers is of great significance for reducing system energy consumption and improving production efficiency. Currently, heat exchangers in supercritical water gasification systems mainly use traditional industrial co-tube heat exchangers, which limits the potential for further improvement in heat transfer efficiency. Therefore, this paper proposes a supercritical geothermal heat exchange device to improve energy recovery from supercritical fluids. Utility Model Content

[0003] The purpose of this invention is to provide a supercritical geothermal heat exchange device. This heat exchange device uses supercritical fluid to reheat the heat exchange medium in the water pipe, which effectively improves the heat recovery of the supercritical fluid. At the same time, the coiled structure of the water pipe effectively increases the heat exchange area and improves the heat exchange efficiency.

[0004] To achieve the above objectives, this utility model provides a supercritical geothermal heat exchange device, including a main shell and a support frame. The main shell is mounted on the support frame. A front shell box and a rear shell box are respectively provided at both ends of the main shell. A plurality of guide pipes are horizontally arranged inside the main shell. The front shell box is connected to the rear shell box through the guide pipes. A supercritical fluid inlet is provided on the front shell box. A heat exchange medium inlet, a heat exchange medium outlet, and a supercritical fluid outlet are respectively provided on the main shell.

[0005] Preferably, the heat exchange medium inlet and the heat exchange medium outlet are connected by water pipes, and the water pipes are coiled around the guide pipes respectively.

[0006] Preferably, the main housing has a cylindrical cross-section, a baffle plate is provided inside the main housing, and the guide pipe passes through the baffle plate.

[0007] Preferably, a first fixed connecting plate is provided between the front housing and the main housing, the first fixed connecting plate being provided with a first circular hole and an annular groove, and a second fixed connecting plate is provided between the rear housing and the main housing, the second fixed connecting plate being provided with a second circular hole.

[0008] Preferably, a middle partition is provided inside the front housing box, and the middle partition, the front housing box and the first fixed connecting plate are connected to form a sealed cavity. The front housing box and the first fixed connecting plate, and the rear housing box and the second fixed connecting plate are all connected by bolts.

[0009] Preferably, the baffles are arranged alternately in the upper and lower parts of the main housing.

[0010] Preferably, the guide tube is made of hollow tube, and the diameter of the guide tube matches the diameter of the first circular hole and the second circular hole.

[0011] Therefore, the supercritical geothermal heat exchange device of this invention, adopting the above-described structure, has the following advantages compared with the prior art:

[0012] (1) The water pipe of this utility model adopts a coil structure and is wound on the water pipe, which effectively improves the heat exchange area and heat exchange efficiency of the heat exchange medium in the water pipe.

[0013] (2) In this utility model, the heat exchange device heats the heat exchange medium in the water pipe once through the supercritical fluid via the guide pipe and then flows into the main shell cavity. The supercritical fluid heats the heat exchange medium in the water pipe a second time under the action of the baffle plate set in the cavity, which effectively improves the heat recovery of the supercritical fluid. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a supercritical geothermal heat exchange device according to the present invention;

[0015] Figure 2 This is a front view of an embodiment of a supercritical geothermal heat exchange device according to this utility model;

[0016] Figure 3 This is a schematic diagram of the internal fluid of an embodiment of a supercritical geothermal heat exchange device according to the present invention;

[0017] Figure 4 This is a schematic diagram of the first fixed connection plate structure of an embodiment of a supercritical geothermal heat exchange device of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the second fixed connecting plate in an embodiment of a supercritical geothermal heat exchange device of this utility model.

[0019] Figure label:

[0020] 1. Front shell box; 2. Main shell box; 3. Rear shell box; 4. Supercritical fluid inlet; 5. Heat exchange medium inlet; 6. Heat exchange medium outlet; 7. Supercritical fluid outlet; 8. Intermediate partition plate; 9. Baffle plate; 10. Water pipe; 11. First fixed connection plate; 1101. First circular hole; 1102. Annular groove; 12. Second fixed connection plate; 1201. Second circular hole; 13. Bolt; 14. Support frame; 15. Guide pipe. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Example

[0024] like Figures 1-2As shown in the diagram, this utility model provides an overall structural schematic of a supercritical geothermal heat exchange device embodiment, including a main shell 2 and a support frame 14. During installation, the main shell 2 is fixed on the support frame 14, which is used to fix it to the ground or mounting base to prevent the heat exchange device from deflecting or moving. A front shell box 1 and a rear shell box 3 are respectively provided at both ends of the main shell 2. Several guide pipes 15 are horizontally arranged inside the main shell 2. In this embodiment, there are four guide pipes 15, and the material of the guide pipes 15 is hollow. The front shell box 1 is connected to the rear shell box 3 through the guide pipes 15. A supercritical fluid inlet 4 is provided at the top of the front shell box 1. A heat exchange medium inlet 5, a heat exchange medium outlet 6, and a supercritical fluid outlet 7 are respectively provided on the main shell 2. The heat exchange medium inlet 5 and the heat exchange medium outlet 6 are connected by water pipes 10. At the same time, the water pipes 10 adopt a coiled structure and are wound around the guide pipes 15. The coiled water pipes 10 effectively increase the heat exchange area and improve the heat exchange efficiency. The main shell 2 has a circular cross-section, and baffles 9 are installed inside the cylindrical main shell 2. The baffles 9 are staggered vertically, and the guide pipe 15 passes through the baffles 9. The baffles 9 ensure that the supercritical fluid sweeps across the water pipe 10, preventing the circulating supercritical fluid from operating only in the laminar flow region, thus effectively enhancing the heat transfer effect. During installation, a first fixed connecting plate 11 is installed between the front shell box 1 and the main shell 2, such as... Figure 4 As shown, the first fixed connecting plate 11 is provided with a first circular hole 1101 and an annular groove 1102, and a second fixed connecting plate 12 is provided between the rear housing 3 and the main housing 2, as shown. Figure 5 As shown, a second circular hole 1201 is provided on the second fixed connecting plate 12, wherein the diameter of the guide pipe 15 matches the diameter of the first circular hole 1101 and the second circular hole 1201, and an intermediate partition plate 8 is provided in the front housing box 1, wherein the partition plate 8, the front housing box 1 and the first fixed connecting plate 11, and the rear housing box 3 and the second fixed connecting plate 12 are all connected by bolts 13 to form a sealed cavity.

[0025] like Figure 3The diagram shows the internal fluid flow of an embodiment of the supercritical geothermal heat exchange device of this invention. The supercritical fluid flows into the front shell 1 through the supercritical fluid inlet 4, then into the rear shell 3 via the guide pipe 15. The supercritical fluid then flows back into the other side of the front shell 1 through the guide pipe 15, and into the main shell 2 through the annular groove 1102 on the first fixed connecting plate 11. Finally, it flows out through the supercritical fluid outlet 7 at the lower end of the main shell 2. Simultaneously, the heat exchange medium enters through the heat exchange medium inlet 5, passes through the coiled water pipe 10, and flows out through the heat exchange medium outlet 6 to complete the heat exchange. Throughout the process, the supercritical fluid heats the heat exchange medium in the water pipe 10 once through the guide pipe 15 before flowing into the cavity of the main shell 2. Under the action of the baffle 9 installed in the cavity, the supercritical fluid further heats the heat exchange medium in the water pipe 10, effectively improving the heat recovery of the supercritical fluid.

[0026] Therefore, this invention uses supercritical fluid for heat exchange. The supercritical fluid heats the heat exchange medium in the water pipe once through the guide pipe and then flows into the main shell cavity. Under the action of the baffles set in the cavity, the supercritical fluid heats the heat exchange medium in the water pipe a second time, which effectively improves the heat recovery of the supercritical fluid. The coiled water pipe effectively increases the heat exchange area and improves the heat exchange efficiency.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A supercritical geothermal heat exchanger, characterized by: The device includes a main shell and a support frame. The main shell is mounted on the support frame. A front shell box and a rear shell box are respectively provided at both ends of the main shell. Several guide pipes are horizontally arranged inside the main shell. The front shell box is connected to the rear shell box through the guide pipes. A supercritical fluid inlet is provided on the front shell box. A heat exchange medium inlet, a heat exchange medium outlet, and a supercritical fluid outlet are respectively provided on the main shell.

2. A supercritical geothermal heat exchanger according to claim 1, wherein: The heat exchange medium inlet and the heat exchange medium outlet are connected by water pipes, which are coiled around the guide pipes.

3. A supercritical geothermal heat exchanger according to claim 2, wherein: The main housing has a circular cross-section, and a baffle plate is provided inside the main housing. The guide pipe passes through the baffle plate.

4. A supercritical geothermal heat exchanger according to claim 3, wherein: A first fixed connecting plate is provided between the front housing and the main housing, and the first fixed connecting plate is provided with a first circular hole and an annular groove. A second fixed connecting plate is provided between the rear housing and the main housing, and the second fixed connecting plate is provided with a second circular hole.

5. A supercritical geothermal heat exchanger according to claim 4, wherein: The front housing is provided with a middle partition plate. The middle partition plate, the front housing, and the first fixed connecting plate are connected to form a sealed cavity. The front housing and the first fixed connecting plate, and the rear housing and the second fixed connecting plate are all connected by bolts.

6. A supercritical geothermal heat exchanger according to claim 5, wherein: The baffles are arranged alternately in the upper and lower parts of the main housing.

7. A supercritical geothermal heat exchanger according to claim 6, wherein: The guide tube is made of hollow tube, and its diameter matches the diameters of the first circular hole and the second circular hole.

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