Centrifugal degasser

Abstract

The utility model relates to the technical field of degassers, and provides a centrifugal degasser which comprises a degasser cylinder, the degasser cylinder is provided with a degasser cavity, an inlet and an outlet are formed in the degasser cavity, the inlet is located below the liquid level of slurry, the outlet is located above the liquid level of the slurry, an impeller is rotationally arranged in the degasser cavity, and a liquid drainage piece is arranged on the degasser cylinder and provided with a liquid drainage cavity. The liquid discharging cavity is larger than the gas removing cylinder in diameter and provided with a liquid outlet and an exhaust port. According to the technical scheme, the problem that a degasser in the prior art is poor in degassing effect is solved.

Description

Technical Field

[0001] This utility model relates to the field of degassing technology, specifically to a centrifugal degassing device. Background Technology

[0002] In many industrial fields such as oil drilling and chemical slurry treatment, the presence of gas in slurries has always been a thorny problem, seriously affecting production operations and product quality. Traditional degassing methods have many limitations.

[0003] Early methods, such as simple settling, relied solely on time for gas to rise and escape naturally. This was extremely inefficient and completely unsuitable for large-scale slurry processing. In gas-leached drilling fluid scenarios, the long wait would delay the project and increase costs. Physical filtration degassing attempted to block gas using filters, but since the gas is mostly dispersed in the form of tiny bubbles within the slurry, it easily penetrates the filters, resulting in negligible degassing effectiveness.

[0004] Some early mechanical stirring degassing equipment, although they have stirring action, lack sophisticated structural design. The stirring only creates local turbulence, and the gas is difficult to systematically gather and separate to the liquid surface. Often, some areas of gas are still trapped in the slurry, which makes it impossible to reduce the overall gas content. For example, in chemical batching slurries, residual gas greatly reduces the reaction activity and product stability.

[0005] Moreover, the previous equipment had an arbitrary layout of outlets and inlets, failed to make good use of the space above and below the liquid surface and the flow characteristics of the slurry, and could not efficiently degas by combining centrifugal force and gravity. The equipment was also often difficult to maintain and costly due to its complex structure, easy blockage and damage, making it difficult to meet the demands of continuous and high-quality industrial production. Utility Model Content

[0006] This invention proposes a centrifugal degasser, which solves the problem of poor degassing effect in related technologies.

[0007] The technical solution of this utility model is as follows:

[0008] A centrifugal degasser for removing gas from inside a slurry, comprising:

[0009] The degassing cylinder has a degassing chamber with an inlet and an outlet. The inlet is located below the slurry surface, and the outlet is located above the slurry surface.

[0010] The impeller is rotatably disposed within the degassing chamber.

[0011] A draining component is provided on the degassing cylinder. The draining component has a draining chamber with a diameter larger than that of the degassing cylinder. The draining chamber has a liquid outlet and a vent outlet.

[0012] As a further technical solution, it also includes:

[0013] The mounting component is disposed at the end of the drain component, and the mounting component has a communicating cavity, through which the vent port opens.

[0014] A degassing component, the degassing component having an air inlet, and the communicating cavity leading to the air inlet.

[0015] As a further technical solution, it also includes:

[0016] A coupling is rotatably disposed within the communicating cavity and divides the communicating cavity into an upper cavity and a lower cavity. The air inlet is located below the communicating cavity and leads to the upper cavity. The impeller is disposed on the coupling.

[0017] As a further technical solution, it also includes:

[0018] A rotation drive is provided at the end of the mounting component, and the output end of the rotation drive passes through the mounting component and is disposed on the coupling to drive the coupling to rotate.

[0019] As a further technical solution, the draining component is volute-shaped, and the outlet is located on the side wall of the draining component.

[0020] As a further technical solution, the degassing cylinder has a coating, which is an anti-corrosion coating.

[0021] As a further technical solution, it also includes:

[0022] The air distributor has an air inlet leading to it.

[0023] The air distribution component leads to the fan.

[0024] A pressurizing component, wherein the fan is connected to the pressurizing component.

[0025] As a further technical solution, the gas distribution component has a guide pipe and a liquid distribution pipe. The liquid distribution pipe has a U-shaped portion, one end of which leads to the fan, and the other end has a liquid distribution port. The air inlet leads to the guide pipe, and the guide pipe leads to the middle of one side of the liquid distribution port.

[0026] As a further technical solution, the liquid distribution tube also has a pressure relief port, and the pressure relief port and the liquid distribution port are respectively located on both sides of the guide tube.

[0027] The working principle and beneficial effects of this utility model are as follows:

[0028] In this invention, the degassing chamber of the degassing cylinder features a unique layout where the inlet is located below the slurry surface and the outlet is located above the slurry surface. Combined with an impeller rotating within the degassing chamber, the gas naturally gathers above the slurry surface due to the agitation of the impeller and the centrifugal force after the slurry enters the chamber. Finally, the gas is discharged from the outlet located above the slurry surface, achieving deep separation of the gas inside the slurry, effectively reducing the gas content in the slurry, and improving the quality of subsequent processing or slurry-related products.

[0029] As the impeller rotates, the gas-leaved drilling fluid mud is gradually fed from the bottom to the top by the degassing blades, forming a columnar liquid layer with an inverted conical cavity in the center, above the fluid level. This process is similar to stirring water in a porcelain jar with chopsticks; as the water rises along the inner wall, an inverted air vortex forms in the center. During this process, liquid and gas begin to separate initially. The mud moves upward under the impeller's influence, while the gas, being less dense than the mud, begins to exhibit a relatively independent distribution within the liquid layer.

[0030] As the liquid column rises, the liquid layer on the inner wall of the degassing cylinder becomes thinner and thinner. The slurry reaching the very top of the degassing cylinder is then tangentially discharged through the outlet of the discharge chamber due to the inertia of the centrifugal force. This tangential discharge method utilizes centrifugal force to allow the slurry to exit the degassing device more smoothly and quickly, while also helping to further separate any remaining gas and ensure that the discharged slurry has the lowest possible gas content.

[0031] Simultaneously, the gas infiltrating the mud gradually rises to the surface along with the increasingly thin mud, rapidly overcoming the surface tension of the liquid and bursting out as bubbles. Due to its low density, the gas eventually accumulates within the inverted conical cavity. As the equipment operates continuously, mud continuously flows in, and gas continuously escapes from the vent. The overall structure is simple, easy to maintain, and provides better slurry venting. Attached Figure Description

[0032] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 for Figure 1 A magnified structural diagram of A in the middle;

[0035] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0036] In the diagram: Degassing cylinder-1, Degassing chamber-101, Inlet-102, Outlet-103, Impeller-2, Drainage component-3, Drainage chamber-301, Outlet-302, Exhaust port-303, Degassing component-4, Inlet-401, Mounting component-5, Connecting chamber-501, Upper chamber-502, Lower chamber-503, Coupling-6, Rotation drive component-7, Gas distribution component-8, Guide pipe-801, Liquid distribution pipe-802, U-shaped part-803, Liquid distribution port-804, Pressure relief port-805, Fan-9, Pressure boosting component-10. Detailed Implementation

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0038] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0039] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Reference Figures 1-3This is the first embodiment of the present invention, which proposes a centrifugal degasser for removing gas from inside slurry. It includes a degassing cylinder 1, which has a degassing chamber 101. The degassing chamber 101 has an inlet 102 and an outlet 103. The inlet 102 is located below the slurry liquid surface, and the outlet 103 is located above the slurry liquid surface. An impeller 2 is rotatably disposed in the degassing chamber 101. A draining component 3 is disposed on the degassing cylinder 1. The draining component 3 has a draining chamber 301. The diameter of the draining chamber 301 is larger than the diameter of the degassing cylinder 1. The draining chamber 301 has a liquid outlet 302 and an exhaust outlet 303.

[0042] In this embodiment, the degassing chamber 101 of the degassing cylinder 1 has a unique layout with the inlet 102 located below the slurry surface and the outlet 103 located above the slurry surface. Combined with the impeller 2 rotating inside the degassing chamber 101, the gas in the slurry, due to its lower density than the slurry, naturally gathers above the slurry surface after entering the degassing chamber 101 and is finally discharged from the degassing chamber 101 through the outlet 103 located above the slurry surface. This achieves deep separation of the gas inside the slurry, effectively reduces the gas content in the slurry, and improves the quality of subsequent processing or use of slurry-related products.

[0043] As impeller 2 rotates, the gas-leaved drilling fluid mud is gradually fed from the bottom to the top by the degassing blades, forming a columnar liquid layer with an inverted conical cavity in the center, above the fluid level. This process is similar to stirring water in a porcelain jar with chopsticks; as the water rises along the inner wall, an inverted air vortex forms in the center. During this process, liquid and gas begin to separate initially. The mud moves upward under the drive of impeller 2, while the gas, due to its lower density than the mud, begins to exhibit a relatively independent distribution within the liquid layer.

[0044] As the liquid column rises, the liquid layer thickness on the inner wall of the degassing cylinder 1 gradually decreases. The slurry reaching the very top of the inner wall of the degassing cylinder 1 is then tangentially discharged through the outlet 302 of the discharge chamber 301 due to the inertia of the centrifugal force. This tangential discharge method utilizes centrifugal force to allow the slurry to exit the degasser more smoothly and quickly, while also helping to further separate any remaining gas, ensuring that the discharged slurry has the lowest possible gas content.

[0045] Simultaneously, the gas infiltrating the mud gradually rises to the surface along with the increasingly thin mud, rapidly overcoming the surface tension of the liquid and bursting out as bubbles. Due to its low density, the gas eventually accumulates within the inverted conical cavity. As the equipment operates continuously, mud continuously flows in, and gas continuously overflows from the exhaust port 303. The overall structure is simple, easy to maintain, and provides better slurry venting.

[0046] Furthermore, it also includes a degassing component 4, which has an air inlet 401. A mounting component 5 is disposed at the end of the drain component 3. The mounting component 5 has a connecting cavity 501. An exhaust port 303 leads to the connecting cavity 501, and the connecting cavity 501 leads to the air inlet 401. A coupling 6 is rotatably disposed in the connecting cavity 501 and divides the connecting cavity 501 into an upper cavity 502 and a lower cavity 503. The air inlet 401 is located below the connecting cavity 501. An impeller 2 is disposed on the coupling 6. A rotation drive component 7 is disposed at the end of the mounting component 5. The output end of the rotation drive component 7 passes through the mounting component 5 and is disposed on the coupling 6 to drive the coupling 6 to rotate.

[0047] In this embodiment, the rotating drive 7 stably outputs power, driving the coupling 6 to rotate smoothly within the connecting cavity 501 of the mounting component 5, thereby driving the impeller 2 to rotate at high speed. When processing slurry mixed with gas, the impeller 2 agitates the material, and gas escapes from the slurry. It first flows into the connecting cavity 501 through the exhaust port 303 of the drain component 3, and then precisely flows into the air inlet 401 of the degassing component 4. The coupling 6 divides the connecting cavity 501 into an upper cavity 502 and a lower cavity 503. The ingenious design of placing the air inlet 401 at the bottom allows the gas to flow smoothly from the air inlet 401 in accordance with the rotation of the impeller 2.

[0048] Mounting component 5 tightly connects the drain component 3 and the degassing component 4. Its internal connecting cavity 501 provides a stable base for the rotation of the coupling 6. The rotation drive component 7 is rigidly connected to the mounting component 5 and has a shock-absorbing pad to reduce vibration transmission. The coupling 6 divides the connecting cavity 501 into an upper cavity 502 and a lower cavity 503, preventing water vapor from contacting the rotation drive component 7, thereby improving the service life of the rotation drive component 7 and reducing the damage rate.

[0049] Furthermore, the drain component 3 is volute-shaped, and the outlet 302 is located on the side wall of the drain component 3.

[0050] In this embodiment, the drain component 3 adopts a volute-shaped design, cleverly conforming to the principles of fluid mechanics. When the degassed slurry flows from the degassing cylinder 1 into the volute-shaped drain component 3, its unique spiral inner wall guides the orderly flow of the slurry. The outlet 302 is located on the side wall of the drain component 3 and is arranged tangentially. This layout allows the discharged slurry to carry "centrifugal inertia," further expelling the gas within the slurry. The volute-shaped structure gives the drain component 3 excellent mechanical stability. Faced with the impact of the slurry, the spiral inner wall evenly disperses the impact force, significantly reducing local stress concentration compared to square or cylindrical structures.

[0051] Furthermore, the degassing cylinder 1 has a coating, which is an anti-corrosion coating.

[0052] In this embodiment, the anti-corrosion coating on the surface of the degassing cylinder 1 effectively resists various possible corrosive media. Corrosion not only damages the structure of the equipment but may also affect its internal hydrodynamic performance and the synergistic effect of its components. For centrifugal degassers, corrosion of the degassing cylinder 1 may cause deformation of the gas and slurry flow channels, affecting the impeller's rotational balance and thus reducing degassing efficiency. However, because the anti-corrosion coating of the degassing cylinder 1 effectively protects the cylinder body, the gas and slurry can always flow stably and smoothly within the designed channels, and the impeller can also maintain a good rotational state continuously in a stable environment.

[0053] Furthermore, it also includes an air distribution component 8, an air inlet 401 leading to the air distribution component 8, the air distribution component 8 leading to the fan 9, and the fan 9 leading to the booster component 10.

[0054] In this embodiment, the coordinated operation of the gas separator 8, the fan 9, and the pressure booster 10 enables the centrifugal degasser to better adapt to slurries with fewer bubbles. The speed of the fan 9 can be flexibly adjusted according to factors such as gas flow rate and pipeline resistance to ensure stable gas output. The use of the gas separator 8 further separates any liquid or gas that may be present in the discharged gas. The pressure booster 10 is designed to prevent gas backflow when the external air pressure is high, which would affect the degassing effect. Through the design of the fan 9 and the pressure booster 10, the internal negative pressure of the equipment is further increased, making it easier for the gas to be discharged.

[0055] Furthermore, the gas distribution component 8 has a guide pipe 801 and a liquid distribution pipe 802. The liquid distribution pipe 802 has a U-shaped part 803. One end of the U-shaped part 803 leads to the fan 9, and the other end has a liquid distribution port 804. The air inlet 401 leads to the guide pipe 801, and the guide pipe 801 leads to the middle part of the liquid distribution port 804 on one side of the U-shaped part 803.

[0056] In this embodiment, the gas distributor 8, through the design of the guide pipe 801 and the liquid distributor 802, achieves the separation of incoming gas and any liquid that may be present. After receiving the gas from the inlet 401, the guide pipe 801 precisely guides it to the middle of the liquid distributor 804 on one side of the U-shaped portion 803 of the liquid distributor 802. If liquid is present, it sinks to the liquid distributor 804, while the gas diffuses upwards. The unique structure of the U-shaped portion 803 acts as a buffer during gas flow. When gas rushes from the guide pipe 801 into the liquid distributor 802, the U-shaped portion 803, with its curved structure, cleverly mitigates the airflow impact, allowing for a smooth transition in gas velocity and pressure. Compared to the turbulence and pressure fluctuations that easily occur in simple direct-connection pipes, the U-shaped portion 803 reduces velocity fluctuations and stabilizes the pressure within the optimal operating range of the fan 9 when gas enters, ensuring stable and continuous air intake and extending the service life of the fan 9.

[0057] Furthermore, the liquid distribution tube 802 also has a pressure relief port 805, and the pressure relief port 805 and the liquid distribution port 804 are located on both sides of the guide tube 801, respectively.

[0058] In this embodiment, the pressure relief port 805 added to the liquid distribution pipe 802 is located on both sides of the guide pipe 801, along with the liquid distribution port 804, forming a crucial pressure safety control mechanism. In actual working conditions, when the inlet pressure spikes due to unexpected factors such as fluctuations in slurry properties (e.g., a sudden reaction of chemical slurry causing a surge in gas escape or localized blockage in the system), the pressure relief port 805 plays a timely role. If the gas pressure of the gas distribution component 8 momentarily exceeds the normal range, a pressure sensor can be installed on one side of the pressure relief port 805. When the pressure changes abruptly, the control device automatically opens the pressure relief port to quickly discharge excess gas, regulating the pressure within the liquid distribution pipe 802 back to a safe range. This ensures that the entire equipment, including downstream components such as the fan 9 and the booster component 10, is protected from high-pressure impact damage, improving equipment operational stability, reducing the frequency of downtime and maintenance caused by abnormal pressure, and ensuring continuous production.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this 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 be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A centrifugal degasser for removing gas from inside a slurry, characterized in that, include: A degassing cylinder (1) has a degassing chamber (101), which has an inlet (102) and an outlet (103). The inlet (102) is located below the slurry surface, and the outlet (103) is located above the slurry surface. Impeller (2), which is rotatably disposed within the degassing chamber (101), The draining component (3) is disposed on the degassing cylinder (1). The draining component (3) has a draining chamber (301) with a diameter larger than that of the degassing cylinder (1). The draining chamber (301) has a liquid outlet (302) and a vent (303).

2. The centrifugal degasser according to claim 1, characterized in that, Also includes: Mounting component (5), which is disposed at the end of the drain component (3), has a communicating cavity (501), and the exhaust port (303) leads to the communicating cavity (501). The degassing component (4) has an air inlet (401), and the connecting cavity (501) leads to the air inlet (401).

3. A centrifugal degasser according to claim 2, characterized in that, Also includes: The coupling (6) is rotatably disposed in the communicating cavity (501) and divides the communicating cavity (501) into an upper cavity (502) and a lower cavity (503). The air inlet (401) is located below the communicating cavity (501) and leads to the upper cavity (502). The impeller (2) is disposed on the coupling (6).

4. A centrifugal degasser according to claim 3, characterized in that, Also includes: A rotation drive (7) is disposed at the end of the mounting (5). The output end of the rotation drive (7) passes through the mounting (5) and is disposed on the coupling (6) to drive the coupling (6) to rotate.

5. A centrifugal degasser according to claim 4, characterized in that, The drain component (3) is volute-shaped, and the outlet (302) is located on the side wall of the drain component (3).

6. A centrifugal degasser according to claim 1, characterized in that, The degassing cylinder (1) has a coating, which is an anti-corrosion coating.

7. A centrifugal degasser according to claim 5, characterized in that, Also includes: The air distribution component (8) has an air inlet (401) leading to it. The fan (9) is connected to the air distribution component (8). A pressurizing component (10) is provided, and the fan (9) is directed to the pressurizing component (10).

8. A centrifugal degasser according to claim 7, characterized in that, The gas distribution component (8) has a guide pipe (801) and a liquid distribution pipe (802). The liquid distribution pipe (802) has a U-shaped part (803). One end of the U-shaped part (803) is connected to the fan (9), and the other end has a liquid distribution port (804). The air inlet (401) is connected to the guide pipe (801), and the guide pipe (801) is connected to the middle part of one side of the liquid distribution port (804).

9. A centrifugal degasser according to claim 8, characterized in that, The liquid distribution tube (802) also has a pressure relief port (805), and the pressure relief port (805) and the liquid distribution port (804) are located on both sides of the guide tube (801).

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