CO2-water mixed injection system for hot dry rock mining

Abstract

The utility model discloses a CO2-water mixed injection system for hot dry rock exploitation. The CO2-water mixed injection system comprises a carbon dioxide and water mixing device, a pretreatment box is fixedly installed on the carbon dioxide and water mixing device, a mist making device is installed on the pretreatment box, a pressure unit is arranged on the pretreatment box, and an adjusting unit is arranged on a fixing frame. The carbon dioxide pretreatment device has the beneficial effects that when the carbon dioxide and water in the pretreatment box are mixed slowly, the pressure in the pretreatment box is increased at the moment, under the action of the starting sensor, the fogger is controlled to start, spray and accelerate the mixing of the carbon dioxide and the water, and when the content of the carbon dioxide in the pretreatment box is continuously increased and the mixing effect of the carbon dioxide and the water is poor, the fogger is controlled to start. At the moment, the first contact seat continuously moves to push the starting sensor to move and drive the starting sensor to be in contact with the closing sensor, the air pump is controlled to stop conveying of carbon dioxide, and the mixing efficiency of carbon dioxide is guaranteed.

Description

Technical Field

[0001] The utility model relates to a CO2-water mixed injection system for hot dry rock mining, in particular to a CO2-water mixed injection system for hot dry rock mining, and belongs to the technical field of CO2-water mixed injection for hot dry rock mining. Background Art

[0002] Carbon dioxide is mixed with water and injected into hot dry rock reservoirs to utilize and store energy while achieving carbon dioxide emission reduction and storage.

[0003] Mix carbon dioxide with water and inject the mixture into hot dry rock reservoirs under high pressure to achieve carbon dioxide emission reduction and storage. In the reservoir, carbon dioxide and water react with rocks under high temperature conditions to improve the efficiency of geothermal energy extraction.

[0004] According to the specific application requirements and underground conditions, the mixing ratio of carbon dioxide and water is determined, and then the carbon dioxide and water are mixed, and then the carbon dioxide and water mixture is injected into the hot dry rock reservoir through a high-pressure injection pump. The existing technology pretreats carbon dioxide and water, and allows carbon dioxide to pass through a water pretreatment box so that carbon dioxide is dissolved in water to complete the mixing of carbon dioxide and water. However, in the existing technology, the mixing efficiency of carbon dioxide and water cannot be guaranteed, resulting in unstable carbon dioxide concentration in the pretreatment box. In order to ensure the mixing efficiency of carbon dioxide and water, after pretreatment, the carbon dioxide and water mixing injection system is used to control the fogger to spray water mist to humidify the carbon dioxide. The fogger is controlled to spray water mist according to the concentration of carbon dioxide, and the concentration of carbon dioxide in the pretreatment box is limited to ensure that the carbon dioxide is at a high mixing efficiency. Therefore, we propose a hot dry rock mining CO2-water mixing injection system. Utility Model Content

[0005] The purpose of the utility model is to provide a CO2-water mixed injection system for hot dry rock mining in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a CO2-water mixing injection system for hot dry rock mining, comprising a carbon dioxide and water mixing device, a pretreatment box fixedly installed on the carbon dioxide and water mixing device, the pretreatment box being connected to the carbon dioxide and water mixing device through a connecting pipe, the pretreatment box being connected to a water tank and an air pump through a connecting pipe, a fog maker being installed on the pretreatment box, and the pretreatment box being provided with:

[0007] A pressure unit, the pressure unit comprising a sliding rod slidably connected to the inner wall of the pretreatment box, a top end surface of the sliding rod being fixedly connected to a first contact seat, and a start sensor being arranged directly above the first contact seat;

[0008] The top end surface of the carbon dioxide and water mixing device is fixedly connected to a fixing frame, and the fixing frame is provided with:

[0009] The adjusting unit comprises a threaded rod fixedly connected to the top end surface of the fixing frame, a sliding seat is slidably connected to the outer wall of the threaded rod, a closing sensor is installed on the bottom end surface of the sliding seat, and the closing sensor is located directly above the starting sensor.

[0010] Preferably, the outer peripheral wall of the sliding rod is sleeved with a spring.

[0011] Preferably, the top end surface of the spring is fixedly connected to the pre-processing box, and the top end surface of the pre-processing box is fixedly connected to the first contact seat.

[0012] Preferably, a moving rod is fixedly connected to the top end surface of the start sensor.

[0013] Preferably, the moving rod is slidably connected to the inner wall of the fixing frame, and the top end surface of the moving rod is fixedly connected to a second contact seat, and the second contact seat is in contact with the fixing frame.

[0014] Preferably, the second contact seat is located directly below the closing sensor.

[0015] Preferably, the outer peripheral wall of the threaded rod is threadedly connected with a nut seat, and the nut seat is fitted with two sides of the sliding seat.

[0016] The beneficial effect of the utility model is as follows: when the mixing of carbon dioxide and water in the pretreatment box is slow, the pressure in the pretreatment box increases, and the sliding rod is pushed to drive the first contact seat to move, so that the first contact seat contacts the starting sensor. Under the action of the starting sensor, the fog maker is controlled to start and spray to accelerate the mixing of carbon dioxide and water. When the carbon dioxide content in the pretreatment box continues to increase and the mixing effect with water is poor, the first contact seat continues to move to push the starting sensor to move, drive the starting sensor to contact the closing sensor, control the air pump to stop the delivery of carbon dioxide, and by adjusting the sliding seat to slide on the threaded rod, change the distance between the closing sensor and the starting sensor, control the pressure in the pretreatment box to be at a specified value, and stop the air pump to ensure the mixing efficiency of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the pretreatment box of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixing frame of the utility model.

[0020] In the figure: 1. Carbon dioxide and water mixing equipment; 2. Pretreatment box; 3. Water tank; 4. Air pump; 5. Mist maker; 6. Fixed frame; 7. Pressure unit; 701. First contact seat; 702. Sliding rod; 703. Spring; 8. Start sensor; 801. Moving rod; 802. Second contact seat; 9. Adjustment unit; 901. Threaded rod; 902. Sliding seat; 903. Closing sensor. DETAILED DESCRIPTION

[0021] 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.

[0022] The utility model embodiment discloses a CO2-water mixed injection system for hot dry rock mining. Figure 1-3 As shown, it includes a carbon dioxide and water mixing device 1, a pretreatment box 2 is fixedly installed on the carbon dioxide and water mixing device 1, the pretreatment box 2 is connected to the carbon dioxide and water mixing device 1 through a connecting pipe, the pretreatment box 2 is connected to a water tank 3 and an air pump 4 through a connecting pipe, water is injected into the pretreatment box 2 through the water tank 3, and carbon dioxide is injected into the pretreatment box 2 through the air pump 4, carbon dioxide and water are mixed in the pretreatment box 2, and then transported to the carbon dioxide and water mixing device 1 through the connecting pipe, a fog maker 5 is installed on the pretreatment box 2, the fog maker 5 is connected to the water in the pretreatment box 2 through a connecting pipe, the water in the pretreatment box 2 is sprayed through the fog maker 5, so that the carbon dioxide in the pretreatment box 2 is mixed with water, and the pretreatment box 2 is provided with:

[0023] The pressure unit 7 includes a sliding rod 702 slidably connected to the inner wall of the pretreatment box 2, and the top end surface of the sliding rod 702 is fixedly connected to the first contact seat 701. A start sensor 8 is arranged just above the first contact seat 701. When the mixing of carbon dioxide and water in the pretreatment box 2 is slow, the pressure in the pretreatment box 2 increases, and the sliding rod 702 is pushed to drive the first contact seat 701 to move, so that the first contact seat 701 contacts the start sensor 8. Under the action of the start sensor 8, the fog maker 5 is controlled to start and spray, thereby accelerating the mixing of carbon dioxide and water.

[0024] The top end surface of the carbon dioxide and water mixing device 1 is fixedly connected with a fixing frame 6, and the fixing frame 6 is provided with:

[0025] The adjusting unit 9 includes a threaded rod 901 fixedly connected to the top end face of the fixing frame 6, a sliding seat 902 is slidably connected to the outer wall of the threaded rod 901, and a closing sensor 903 is installed on the bottom end face of the sliding seat 902. The closing sensor 903 is located directly above the starting sensor 8. When the carbon dioxide content in the pretreatment box 2 continues to increase and the mixing effect with water is poor, the first contact seat 701 continues to move to push the starting sensor 8 to move, drive the starting sensor 8 to contact the closing sensor 903, and control the air pump 4 to stop the delivery of carbon dioxide. By adjusting the sliding seat 902 to slide on the threaded rod 901, the distance between the closing sensor 903 and the starting sensor 8 is changed, and the pressure in the pretreatment box 2 is controlled to be at a specified value, and the air pump 4 stops working to ensure the mixing efficiency of carbon dioxide.

[0026] The outer wall of the sliding rod 702 is sleeved with a spring 703 .

[0027] The top end surface of the spring 703 is fixedly connected to the pretreatment box 2, and the top end surface of the pretreatment box 2 is fixedly connected to the first contact seat 701. When the pressure in the pretreatment box 2 is too large, the sliding rod 702 is pushed to move under the pressure of the pretreatment box 2, driving the first contact seat 701 to move, so that the spring 703 is stretched. When the first contact seat 701 moves, the first contact seat 701 contacts the start sensor 8. At this time, the start sensor 8 controls the fog maker 5 to start, and the water in the pretreatment box 2 is sprayed through the fog maker 5 to facilitate the mixing of carbon dioxide and water in the pretreatment box 2.

[0028] A moving rod 801 is fixedly connected to the top end surface of the start sensor 8 .

[0029] The moving rod 801 is slidably connected to the inner wall of the fixed frame 6, and the top end face of the moving rod 801 is fixedly connected to the second contact seat 802, and the second contact seat 802 is in contact with the fixed frame 6. When the first contact seat 701 contacts the start sensor 8, the start sensor 8 pushes the moving rod 801 and the second contact seat 802 to move.

[0030] The second contact seat 802 is directly below the closing sensor 903. When the pressure in the pretreatment box 2 continues to increase, the first contact seat 701 continues to move, pushing the second contact seat 802 to move, so that the second contact seat 802 contacts the closing sensor 903. At this time, the closing sensor 903 controls the air pump 4 to shut down and stop the delivery of carbon dioxide until the carbon dioxide in the pretreatment box 2 is mixed with water, so that the pressure in the pretreatment box 2 is reduced. At this time, under the rebound of the spring 703, the first contact seat 701 is pulled downward. At this time, the start sensor 8, the moving rod 801 and the second contact seat 802 move downward, so that the second contact seat 802 is separated from the closing sensor 903. At this time, the air pump 4 starts and continues to deliver carbon dioxide to the pretreatment box 2.

[0031] The outer wall of the threaded rod 901 is threadedly connected with a nut seat, and the nut seat fits with both sides of the sliding seat 902. The position of the sliding seat 902 is adjusted by adjusting the position of the threaded seat, and then the position of the sliding seat 902 on the threaded rod 901 is adjusted, and the position of the closing sensor 903 is adjusted. The first contact seat 701 is adjusted to move to push the second contact seat 802 to contact the closing sensor 903, and the air pump 4 is controlled to stop moving, so that the pressure critical value in the pretreatment box 2 is at a specified value.

[0032] 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 CO2-water mixing injection system for hot dry rock mining, comprising a carbon dioxide and water mixing device (1), characterized in that: A pretreatment box (2) is fixedly mounted on the carbon dioxide and water mixing device (1), the pretreatment box (2) is connected to the carbon dioxide and water mixing device (1) via a connecting pipe, the pretreatment box (2) is connected to a water tank (3) and an air pump (4) via a connecting pipe, a fogger (5) is mounted on the pretreatment box (2), and the pretreatment box (2) is provided with: A pressure unit (7), the pressure unit (7) comprising a sliding rod (702) slidably connected to the inner wall of the pretreatment box (2), the top end surface of the sliding rod (702) being fixedly connected to a first contact seat (701), and a start sensor (8) being arranged directly above the first contact seat (701); The top end surface of the carbon dioxide and water mixing device (1) is fixedly connected to a fixing frame (6), and the fixing frame (6) is provided with: An adjustment unit (9), the adjustment unit (9) comprising a threaded rod (901) fixedly connected to the top end surface of a fixing frame (6), a sliding seat (902) being slidably connected to the outer wall of the threaded rod (901), a closing sensor (903) being installed on the bottom end surface of the sliding seat (902), and the closing sensor (903) being located directly above the start sensor (8).

2. The hot dry rock mining CO2-water mixed injection system according to claim 1, characterized in that: The outer peripheral wall of the sliding rod (702) is sleeved with a spring (703).

3. The hot dry rock mining CO2-water mixed injection system according to claim 2 is characterized in that: The top end surface of the spring (703) is fixedly connected to the pre-treatment box (2), and the top end surface of the pre-treatment box (2) is fixedly connected to the first contact seat (701).

4. The hot dry rock mining CO2-water mixed injection system according to claim 3 is characterized in that: A moving rod (801) is fixedly connected to the top end surface of the start sensor (8).

5. The hot dry rock mining CO2-water mixed injection system according to claim 4, characterized in that: The moving rod (801) is slidably connected to the inner wall of the fixed frame (6); the top end surface of the moving rod (801) is fixedly connected to a second contact seat (802); and the second contact seat (802) is in close contact with the fixed frame (6).

6. The hot dry rock mining CO2-water mixed injection system according to claim 5, characterized in that: The second contact seat (802) is located directly below the closing sensor (903).

7. The hot dry rock mining CO2-water mixed injection system according to claim 1, characterized in that: The outer peripheral wall of the threaded rod (901) is threadedly connected with a nut seat, and the nut seat is fitted with two sides of the sliding seat (902).

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