Carbon dioxide fracturing discharging device

Abstract

The utility model discloses a carbon dioxide fracturing discharge device, which relates to the technical field of carbon dioxide fracturing, and comprises a feed box, a filter plate, a heat exchange tube and a recovery box, the filter plate is arranged in the feed box, one side of the bottom of the feed box is provided with a hole groove which is communicated with the inside of a vaporization box, one side of the bottom of the feed box is provided with a baffle, and the baffle is provided with a baffle. The top of the baffle is connected with the telescopic end of the bottom of an air pressure rod, the air pressure rod is installed on one side of the feeding box, a heat exchange pipe is arranged in the vaporization box, and after liquid carbon dioxide enters the vaporization box, the air pressure rod drives the baffle to downwards close a hole groove in one side of the top of the vaporization box; and the interior of the vaporization box is vacuumized through the vacuum pump on one side, so that the boiling point of liquid carbon dioxide in the vaporization box is reduced, the needed heat is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide fracturing, in particular to a carbon dioxide fracturing discharge device. Background Art

[0002] Carbon dioxide fracturing technology is a technology that uses liquid carbon dioxide instead of water as a fracturing fluid for fracturing. When performing carbon dioxide fracturing, it is necessary to discharge and collect the waste generated by carbon dioxide fracturing through a carbon dioxide fracturing discharge device. The Chinese patent authorization number CN220119141U discloses a carbon dioxide fracturing discharge device. After completing the vaporization of liquid carbon dioxide, the device collects carbon dioxide gas through a recovery box and multiple recovery pipes, and re-liquefies the carbon dioxide gas through a cooling tank where a coolant is placed, which is convenient for its secondary use. The device purifies the liquid carbon dioxide and re-liquefies it, reducing the waste of resources. However, when the device separates and liquefies the discharged liquid carbon dioxide again during discharge, the liquid carbon dioxide is heated by the bottom of the heating plate, which causes the upper layer of the liquid carbon dioxide to be heated slowly, resulting in uneven heating. The bottom layer of the liquid carbon dioxide needs to reach a certain temperature before the upper layer of the liquid carbon dioxide can be slowly heated, and more heat is required during the heating process, which increases the cost of use. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a carbon dioxide fracturing discharge device, which solves the problem that when the prior device proposed in the background technology separates and liquefies the discharged liquid carbon dioxide again during discharge, the liquid carbon dioxide is heated by a heating plate arranged at the bottom, which causes the upper layer of the liquid carbon dioxide to be heated slowly, thereby causing uneven heating. The liquid carbon dioxide bottom layer needs to reach a certain temperature before the upper layer of the liquid carbon dioxide can be slowly heated, and more heat is required during the heating process, which increases the cost of use.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a carbon dioxide fracturing discharge device, comprising a feed box, a filter plate, a heat exchange pipe and a recovery box, the feed box is provided with a filter plate inside, a bottom side of the feed box is provided with a hole groove connected to the inside of a vaporizer box, a baffle is provided on the bottom side of the feed box, the top of the baffle is connected to the telescopic end of the bottom of the gas pressure rod, the gas pressure rod is installed on one side of the feed box, a heat exchange pipe is provided inside the vaporizer box, both ends of the heat exchange pipe are connected to the inside of the gas groove, one side of the gas groove is connected to the connecting hole, a vacuum pump is installed on the other side of the vaporizer box, the vacuum pump is connected to the inside of the vaporizer box, a side plate is installed on the vaporizer box and one side of the feed box, the top side of the vaporizer box is connected to the inside of the recovery box through a recovery pipe, the inside of the recovery box is connected to the discharge port, a cooling box is provided outside the recovery box, and the inside of the cooling box is connected to the feeding port.

[0005] Preferably, two filter plates are provided, the two filter plates are in a wavy structure, and filter holes are evenly distributed on the surface of the filter plates, and waste can be filtered through the filter plates to separate solid from liquid, so that liquid carbon dioxide can be collected in a feed box.

[0006] Preferably, the heat exchange tubes are made of copper-aluminum composite material, and are distributed at equal intervals from each other. By providing a plurality of heat exchange tubes, the contact area between the liquid and the heat exchange tubes is increased, thereby facilitating sufficient heating of the liquid carbon dioxide.

[0007] Preferably, the outer wall surface of the heat exchange tube is regularly distributed with fins in an annular shape, and the fins are helpful to further increase the surface area of ​​the heat exchange tube, thereby helping to further improve the heating efficiency of the heat exchange tube.

[0008] Preferably, there is a gap between the recovery box and the cooling box, and the recovery box is made of copper-aluminum composite material. When the vaporized carbon dioxide inside the vaporization box enters the recovery box through the recovery pipe, the coolant is transported between the recovery box and the cooling box through the feeding port, thereby cooling the inside of the recovery box, so that the liquid carbon dioxide is purified and liquefied again, reducing the waste of resources.

[0009] The utility model provides a carbon dioxide fracturing discharge device, which has the following beneficial effects:

[0010] (1) In this carbon dioxide fracturing discharge device, when liquid carbon dioxide enters the vaporizer box, the gas pressure rod drives the baffle plate downward to close the hole groove on one side of the top of the vaporizer box, and then the inside of the vaporizer box is evacuated to a vacuum state through a vacuum pump on one side, thereby reducing the boiling point of the liquid carbon dioxide in the vaporizer box, thereby reducing the required heat, thereby achieving an energy-saving effect.

[0011] (2) A carbon dioxide fracturing discharge device, when in use, adds waste and liquid carbon dioxide into the feed box, and then drives the baffle to rise through the gas pressure rod, and the liquid carbon dioxide enters the vaporization box through the hole groove on one side of the bottom of the feed box, and then connects the high-temperature steam with the connecting hole on one side of the vaporization box. The high-temperature steam heats the heat exchange tube when passing through the gas groove and the heat exchange tube, and then the heat exchange tube can evenly heat and vaporize the liquid carbon dioxide in the vaporization box, avoiding the phenomenon of uneven heating of the upper and lower layers of the liquid, thereby improving the heating efficiency.

[0012] This solves the problem that when the existing device separates and liquefies the discharged liquid carbon dioxide again during discharge, the liquid carbon dioxide is heated by a heating plate at the bottom, which causes the upper layer of the liquid carbon dioxide to be heated slowly, resulting in uneven heating. The liquid carbon dioxide bottom layer needs to reach a certain temperature before the upper layer of the liquid carbon dioxide can be slowly heated, and more heat is required during the heating process, which increases the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a rear view structural diagram of the utility model;

[0016] Figure 4 This is a schematic diagram of the top view structure of the utility model;

[0017] Figure 5 This is a schematic diagram of the heat exchange tube structure of the utility model.

[0018] In the figure, 1. feed box; 2. filter plate; 3. side plate; 4. baffle; 5. air pressure rod; 6. vaporization box; 7. air groove; 8. connecting hole; 9. heat exchange tube; 10. recovery tube; 11. vacuum pump; 12. recovery box; 13. cooling box; 14. feeding port; 15. discharge port. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] See also Figure 1-5 A carbon dioxide fracturing discharge device comprises a feed box 1, a filter plate 2, a heat exchange pipe 9 and a recovery box 12. A filter plate 2 is arranged inside the feed box 1. A hole groove is arranged on one side of the bottom of the feed box 1 to communicate with the inside of the vaporization box 6. A baffle 4 is arranged on one side of the bottom of the feed box 1. The top of the baffle 4 is connected to the telescopic end of the bottom of the gas pressure rod 5. The gas pressure rod 5 is installed on one side of the feed box 1. A heat exchange pipe 9 is arranged inside the vaporization box 6. Both ends of the heat exchange pipe 9 are connected with the inside of the gas groove 7. One side of the gas groove 7 is connected with the connecting hole 8. A vacuum pump 11 is installed on the other side of the vaporization box 6. The vacuum pump 11 is connected with the inside of the vaporization box 6. The vaporization box 6 and one side of the feed box 1 are equipped with a side plate 3. One side of the top of 6 is communicated with the inside of the recovery box 12 through the recovery pipe 10, the inside of the recovery box 12 is communicated with the discharge port 15, a cooling box 13 is arranged outside the recovery box 12, the inside of the cooling box 13 is communicated with the feeding port 14, two filter plates 2 are arranged, the two filter plates 2 are in a wavy structure, and filter holes are evenly distributed on the surface of the filter plates 2. When the liquid carbon dioxide enters the vaporization box 6, the air pressure rod 5 drives the baffle 4 to close the hole groove on one side of the top of the vaporization box 6 downward, and then the inside of the vaporization box 6 is evacuated to a vacuum state through the vacuum pump 11 on one side, thereby reducing the boiling point of the liquid carbon dioxide in the vaporization box 6, thereby reducing the required heat, thereby achieving an energy-saving effect.

[0022] Embodiment 2:

[0023] The heat exchange tube 9 is made of copper-aluminum composite material, and the heat exchange tubes 9 are distributed at equal intervals with each other. By setting up a plurality of heat exchange tubes, the outer wall surface of the heat exchange tube 9 is regularly distributed with fins in annular shape. When the device is in use, waste and liquid carbon dioxide are added into the feed box 1, and then the baffle 4 is driven to rise by the gas pressure rod 5. The liquid carbon dioxide enters the vaporization box 6 through the hole groove on one side of the bottom of the feed box 1, and then the high-temperature steam is connected to the connecting hole 8 on one side of the vaporization box 6. The high-temperature steam heats the heat exchange tube 9 when passing through the gas groove 7 and the heat exchange tube 9, and then the heat exchange tube 9 can evenly heat and vaporize the liquid carbon dioxide in the vaporization box 6, avoiding the phenomenon of uneven heating of the upper and lower layers of the liquid, thereby improving the heating efficiency. The fins are conducive to further increasing the surface area of ​​the heat exchange tube 9, thereby further improving the heating efficiency of the heat exchange tube 9.

[0024] Working principle: When the device is used, waste and liquid carbon dioxide are added into the feed box 1, and the waste is filtered through the filter plate 2, and then the baffle 4 is lifted up by the gas pressure rod 5, and the liquid carbon dioxide enters the vaporization box 6 through the hole groove on one side of the bottom of the feed box 1, and then the high-temperature steam is connected to the connecting hole 8 on one side of the vaporization box 6. The high-temperature steam heats the heat exchange tube 9 when passing through the gas groove 7 and the heat exchange tube 9, and then the heat exchange tube 9 can evenly heat and vaporize the liquid carbon dioxide in the vaporization box 6, avoiding the phenomenon of uneven heating of the upper and lower layers of the liquid, thereby improving the heating efficiency. The fins are conducive to further increasing the surface area of ​​the heat exchange tube 9, thereby It is beneficial to further improve the heating efficiency of the heat exchange tube 9. When the liquid carbon dioxide enters the vaporizer box 6, the gas pressure rod 5 drives the baffle 4 downward to close the hole groove on one side of the top of the vaporizer box 6, and then the inside of the vaporizer box 6 is evacuated to a vacuum state through the vacuum pump 11 on one side, thereby reducing the boiling point of the liquid carbon dioxide in the vaporizer box 6, thereby reducing the required heat, thereby achieving energy-saving effect. When the vaporized carbon dioxide in the vaporizer box 6 enters the recovery box 12 through the recovery pipe 10, the coolant is transported between the recovery box 12 and the cooling box 13 through the feeding port 14, thereby cooling the inside of the recovery box 12, so that the liquid carbon dioxide is purified and liquefied again, reducing the waste of resources.

[0025] The components of the utility model, 1, feed box; 2, filter plate; 3, side plate; 4, baffle; 5, air pressure rod; 6, vaporization box; 7, air groove; 8, connecting hole; 9, heat exchange tube; 10, recovery tube; 11, vacuum pump; 12, recovery box; 13, cooling box; 14, feeding port; 15, discharge port, are all common standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A carbon dioxide fracturing discharge device, characterized in that: The invention comprises a feed box (1), a filter plate (2), a heat exchange tube (9) and a recovery box (12), wherein the feed box (1) is provided with a filter plate (2), a bottom side of the feed box (1) is provided with a hole groove connected to the inside of a vaporizer box (6), a baffle plate (4) is provided on the bottom side of the feed box (1), the top of the baffle plate (4) is connected to the telescopic end of the bottom of a gas pressure rod (5), the gas pressure rod (5) is installed on one side of the feed box (1), a heat exchange tube (9) is provided inside the vaporizer box (6), and both ends of the heat exchange tube (9) are connected to the inside of a gas groove (7). The gas groove (7) is connected to the connecting hole (8), a vacuum pump (11) is installed on the other side of the vaporizer box (6), and the vacuum pump (11) is connected to the inside of the vaporizer box (6). The vaporizer box (6) and the feed box (1) are installed with a side plate (3). The top side of the vaporizer box (6) is connected to the inside of a recovery box (12) through a recovery pipe (10), and the inside of the recovery box (12) is connected to a discharge port (15). A cooling box (13) is arranged outside the recovery box (12), and the inside of the cooling box (13) is connected to a feed port (14).

2. A carbon dioxide fracturing discharge device according to claim 1, characterized in that: Two filter plates (2) are provided, the two filter plates (2) are in a wavy structure, and filter holes are evenly distributed on the surface of the filter plates (2).

3. A carbon dioxide fracturing discharge device according to claim 1, characterized in that: The heat exchange tubes (9) are made of a copper-aluminum composite material, and the heat exchange tubes (9) are distributed at equal intervals from each other.

4. A carbon dioxide fracturing discharge device according to claim 1, characterized in that: The outer wall surface of the heat exchange tube (9) is provided with fins distributed in a regular annular shape.

5. The carbon dioxide fracturing discharge device according to claim 1, characterized in that: There is a gap between the recovery box (12) and the cooling box (13), and the recovery box (12) is made of a copper-aluminum composite material.

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