Liquid carbon dioxide cold sand tank unloading equipment

Abstract

The utility model discloses liquid carbon dioxide cold sand tank unloading equipment, and particularly relates to the technical field of cold sand tank unloading equipment, the liquid carbon dioxide cold sand tank unloading equipment comprises a material receiving box arranged below a cold sand tank body, the top of the material receiving box is fixedly provided with a material receiving pipe, the material receiving pipe is communicated with the interior of the material receiving box, one side of the material receiving pipe is fixedly provided with an exhaust pipe in a penetrating mode, and the exhaust pipe is communicated with the interior of the material receiving box. A suction pump is fixedly arranged on one side of the top of the material collecting box, an air inlet of the suction pump is communicated with an air suction pipe, an air outlet of the suction pump is communicated with an air conveying pipe, the bottom of the air conveying pipe is communicated with an air spraying pipe, and a plurality of air outlet heads distributed in an annular array are fixedly arranged at the bottom of the air spraying pipe. According to the cold sand tank, the exhaust pipe is used for exhausting air, and the air spraying pipe is used for blowing air, so that materials in the cold sand tank body quickly fall into the material receiving box through the discharging pipe and the material receiving pipe under the action of suction force, the materials are prevented from being blocked in the discharging pipe and the material receiving pipe, the structure is simple, a structure does not need to be arranged in the tank, and the manufacturing cost of the cold sand tank body can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of cold sand tank unloading equipment, and more specifically to a liquid carbon dioxide cold sand tank unloading equipment. Background Technology

[0002] Liquid carbon dioxide cold sand tanks are generally double-walled containers consisting of inner and outer layers, employing a vacuum powder insulation design. The inner container is typically made of 16MnDR material, while the outer container material can be Q235-B or 16MnR depending on the user's region. The interlayer between the inner and outer containers is filled with perlite insulation and evacuated to reduce heat transfer and maintain a low-temperature environment. Liquid carbon dioxide is stored in a liquid state within the cold sand tank at low temperatures. A refrigeration unit maintains the low temperature; when the temperature rises, the refrigeration unit is activated to lower the temperature inside the carbon dioxide storage tank to the design temperature. Typically, the carbon dioxide exists in a liquid state at -23℃ to -30℃ in the storage tank. In the oil extraction field, during dry carbon dioxide fracturing operations, liquid carbon dioxide cold sand tanks are used to store and supply liquid carbon dioxide, as well as for mixing with proppant, helping to improve the production capacity of reservoirs severely damaged by water / water lock and adsorbed natural gas reservoirs (such as shale gas and coalbed methane). In industries such as metal smelting and chemicals, liquid carbon dioxide can be used for cooling and protective atmospheres, while cold sand tanks are used to store and supply liquid carbon dioxide to meet the needs of the production process.

[0003] For example, the prior art disclosure number CN210164469U describes a liquid carbon dioxide cold sand tank unloading device. This utility model facilitates unloading of the cold sand tank by setting up stirring blades and unloading mechanism in the cold sand tank. Both the stirring blades and the conveying blades are made of cast iron, which is relatively wear-resistant. The stirring blades are simpler and less expensive than the screw conveyor system. Moreover, the volume of the stirring blades is smaller than that of the screw conveyor mechanism, making them easier to replace.

[0004] However, the existing technology has the following problems in use: traditional cold sand tanks require an internal agitator for mixing during unloading. Because the material wears down in contact with the agitator, it needs frequent replacement. Furthermore, the agitator is located at the bottom of the cold sand tank, making operation time-consuming and labor-intensive. Therefore, this invention provides a liquid carbon dioxide cold sand tank unloading device with high unloading efficiency. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides a liquid carbon dioxide cold sand tank unloading device. The device collects the discharged material at the bottom of the cold sand tank via a receiving box, uses an air extraction pipe to draw air, and a jet pipe to blow air, causing the material inside the cold sand tank to quickly fall into the receiving box through the discharge and receiving pipes under suction. This avoids blockages in the discharge and receiving pipes. The device has a simple structure and requires no internal structure, thereby reducing the manufacturing cost of the cold sand tank and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a liquid carbon dioxide cold sand tank unloading device, comprising a receiving box located below the cold sand tank body, a receiving pipe fixedly installed on the top of the receiving box, the receiving pipe communicating with the interior of the receiving box, an exhaust pipe fixedly passing through one side of the receiving pipe, a suction pump fixedly installed on one side of the top of the receiving box, the air inlet of the suction pump communicating with the exhaust pipe, an air delivery pipe communicating with the air outlet of the suction pump, an air jet pipe communicating with the bottom of the air delivery pipe, and a plurality of air outlets arranged in a circular array fixedly installed at the bottom of the air jet pipe, each air outlet communicating with the interior of the air jet pipe, and the bottom ends of each air outlet extending into the interior of the cold sand tank body for uniformly spraying gas into the interior of the cold sand tank body, thereby increasing the unloading speed and preventing material blockage.

[0007] In a preferred embodiment, a filter screen is fixedly installed inside the suction pipe, and one end of the suction pipe is set to be inclined. When some material flows into the suction pipe, it can flow into the receiving box under the action of gravity. At the same time, the filter screen can prevent too much material from flowing into the suction pipe and avoid material flowing into the suction pump and causing blockage.

[0008] In a preferred embodiment, a support plate is fixedly provided on the top of the receiving box. The support plate is located on one side of the suction pump and is sleeved on the outside of the air supply pipe for reinforcement, so as to prevent the air supply pipe from shaking and affecting the connection between the air supply pipe and the suction pump and the jet pipe.

[0009] In a preferred embodiment, a detachable sealing door is fixedly provided on one side of the receiving box, and a rubber sealing strip is provided between the sealing door and the receiving box to fill the gap between them. The rubber sealing strip can improve the sealing performance between the sealing door and the receiving box.

[0010] In a preferred embodiment, a glass observation window is fixedly provided on the sealed door. The glass observation window allows the staff to view the inside of the receiving box at any time. The bottom wall of the receiving box is set as a slope. The slope design facilitates the material to flow towards the opening under the action of gravity, which is convenient for rapid unloading.

[0011] In a preferred embodiment, the cold sand tank and the receiving box are fixed together by multiple support legs, which are arranged in a circular array at the bottom of the cold sand tank to improve the stability between the cold sand tank and the receiving box.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model collects the discharged material at the bottom of the cold sand tank through a receiving box, and uses an air extraction pipe to draw air and an air jet pipe to blow air, so that the material in the cold sand tank falls quickly into the receiving box through the discharge pipe and the receiving pipe under the suction force, avoiding the material from clogging in the discharge pipe and the receiving pipe. The structure is simple and does not require a structure inside the tank, thereby reducing the manufacturing cost of the cold sand tank.

[0014] 2. By setting multiple air outlets at the bottom of the jet pipe, and distributing the multiple air outlets in a ring, the gas can be sprayed evenly, improving the unloading efficiency. In addition, the bottom wall of the receiving box is set with a slope to facilitate rapid material discharge and improve the receiving efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the overall structure of this utility model;

[0017] Figure 3 This is a rear view of the overall structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of the receiving box of this utility model;

[0019] Figure 5 This is a cross-sectional view of the receiving tube of this utility model.

[0020] The attached diagram is labeled as follows: 1. Receiving box; 2. Receiving pipe; 3. Air extraction pipe; 4. Suction pump; 5. Air delivery pipe; 6. Air jet pipe; 7. Air outlet; 8. Filter screen; 9. Support plate; 10. Sealing door; 11. Rubber sealing strip; 12. Glass observation window; 13. Cold sand tank body; 14. Support leg. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Refer to the instruction manual appendix Figures 1-5 This utility model provides a liquid carbon dioxide cold sand tank unloading device, including a receiving box 1 located below the cold sand tank body 13. The cold sand tank body 13 and the receiving box 1 are fixed together by multiple support legs 14. The multiple support legs 14 are arranged in a circular array at the bottom of the cold sand tank body 13 to improve the firmness between the cold sand tank body 13 and the receiving box 1. A receiving pipe 2 is fixedly provided on the top of the receiving box 1, and the receiving pipe 2 communicates with the inside of the receiving box 1. An exhaust pipe 3 is fixedly passed through one side of the receiving pipe 2. A suction pump 4 is fixed to one side of the top by bolts. For example, a vane-type high-pressure air pump is selected, which is similar to a centrifugal pump. It draws in and accelerates air through rotating vanes and then discharges it through the air outlet of the pump body. The air inlet of the suction pump 4 is connected to the suction pipe 3. A filter screen 8 is fixed inside the suction pipe 3. One end of the suction pipe 3 is set in an inclined shape to prevent material from falling directly into the suction pipe 3 through the discharge pipe. At the same time, some of the material sucked into the suction pipe 3 is blocked by the filter screen 8, which can prevent the suction pipe 3 from being blocked.

[0023] The outlet of the suction pump 4 is connected to an air supply pipe 5, and the bottom of the air supply pipe 5 is connected to an air jet pipe 6. The bottom of the air jet pipe 6 is fixed with multiple air outlets 7 arranged in a ring array. The multiple air outlets 7 are all connected to the inside of the air jet pipe 6, and the bottom ends of the multiple air outlets 7 extend into the inside of the cold sand tank 13. The multiple air outlets 7 spray gas evenly, and the gas blows the material inside the cold sand tank 13 downward, thereby preventing the material from clogging the discharge pipe and the receiving pipe 2.

[0024] In actual use, the staff installs the receiving box 1 at the bottom of the cold sand tank 13 and connects the receiving pipe 2 to the discharge pipe at the bottom of the cold sand tank 13. During unloading, the suction pump 4 and the air extraction pipe 3 are used to draw air. Under the action of suction, the material in the cold sand tank 13 falls into the receiving box 1 through the discharge pipe and the receiving pipe 2. At the same time, the gas blown out by the suction pump 4 is transported to the inside of the air jet pipe 6 through the air delivery pipe 5, and then sprayed out from the air outlet 7 at the bottom of the air jet pipe 6, blowing the material in the tank into the unloading pipe. Since there are multiple air outlets 7, and the multiple air outlets 7 are distributed in a ring, the gas can be sprayed evenly to assist in unloading and avoid the material from getting blocked in the discharge pipe and the receiving pipe 2. The structure is simple and there is no need to set up a structure inside the tank, which can reduce the manufacturing cost of the cold sand tank 13.

[0025] Refer to the instruction manual appendix Figure 1 and Figure 3 The top of the receiving box 1 is fixed with a support plate 9 by bolts. The support plate 9 is located on one side of the suction pump 4 and is sleeved on the outside of the air supply pipe 5 for reinforcement, so as to prevent the air supply pipe 5 from shaking and affecting the connection between it and the suction pump 4 and the jet pipe 6.

[0026] like Figures 2-4As shown, a detachable sealing door 10 is fixed to one side of the receiving box 1 by bolts. A rubber sealing strip 11 is provided between the sealing door 10 and the receiving box 1 to fill the gap between them. After unloading, the staff can remove the sealing door 10 to collect the material in the receiving box 1 and reinstall the sealing door 10. The rubber sealing strip 11 can improve the sealing between the sealing door 10 and the receiving box 1.

[0027] And, as Figures 2-4 As shown, a glass observation window 12 is fixedly provided on the sealed door 10. The bottom wall of the receiving box 1 is set as an inclined surface, which is inclined towards the discharge port of the receiving box 1. The glass observation window 12 is provided to facilitate the staff to check the inside of the receiving box 1 at any time. In addition, the inclined surface design makes it easy for the material to flow towards the opening under the action of gravity, which is convenient for rapid material discharge.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid carbon dioxide cold sand tank unloading device, comprising a receiving box (1) disposed below the cold sand tank body (13), characterized in that: The top of the receiving box (1) is fixedly provided with a receiving pipe (2), which is connected to the inside of the receiving box (1). An air extraction pipe (3) is fixedly passed through one side of the receiving pipe (2). A suction pump (4) is fixedly installed on one side of the top of the receiving box (1). The air inlet of the suction pump (4) is connected to the suction pipe (3). The air outlet of the suction pump (4) is connected to the air supply pipe (5). The bottom of the air supply pipe (5) is connected to the jet pipe (6). The bottom of the jet pipe (6) is fixedly provided with multiple air outlets (7) arranged in a ring array. The multiple air outlets (7) are all connected to the inside of the jet pipe (6). The bottom ends of the multiple air outlets (7) extend into the cold sand tank (13).

2. The liquid carbon dioxide cold sand tank unloading device according to claim 1, characterized in that: The air extraction pipe (3) is equipped with a filter screen (8) inside, and one end of the air extraction pipe (3) is set in an inclined shape.

3. The liquid carbon dioxide cold sand tank unloading equipment according to claim 1, characterized in that: The top of the receiving box (1) is fixedly provided with a support plate (9), which is located on one side of the suction pump (4) and is sleeved on the outside of the air supply pipe (5) for reinforcement.

4. The liquid carbon dioxide cold sand tank unloading equipment according to claim 1, characterized in that: A detachable sealing door (10) is fixedly provided on one side of the receiving box (1), and a rubber sealing strip (11) is provided between the sealing door (10) and the receiving box (1) to fill the gap between them.

5. The liquid carbon dioxide cold sand tank unloading device according to claim 4, characterized in that: A glass observation window (12) is fixedly provided on the sealed door (10), and the bottom wall of the receiving box (1) is set as an inclined surface.

6. The liquid carbon dioxide cold sand tank unloading equipment according to claim 1, characterized in that: The cold sand tank (13) is fixed to the receiving box (1) by multiple support legs (14), which are arranged in a ring array at the bottom of the cold sand tank (13).

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