A gas-liquid separator for methanol production

Abstract

This invention relates to the field of gas-liquid separator technology, and provides a gas-liquid separator for methanol production. The separator includes a cylinder with an outlet, a liquid outlet, and a feed inlet. Two centrifugal cones are rotatably disposed within the cylinder and rotatably connected to the inner wall of the cylinder, so that the inner walls of the centrifugal cones and the inner wall of the cylinder form a centrifugal cavity. The liquid outlet and feed inlet are both connected to the centrifugal cavity. The cross-sectional area of ​​the centrifugal cones gradually increases towards the liquid outlet, and the two centrifugal cones are symmetrically arranged. The centrifugal cones also have exhaust ports, both of which can be connected to the outlet via pipelines. By replacing the disc-shaped swirling blades with centrifugal cones, rotatably connected to the cylinder wall to form a centrifugal cavity, the separation surface is increased, and ineffective gaps are reduced. The increased cross-sectional area of ​​the cones along the liquid outlet extends the separation path, enhances centrifugal force, and actively rotates to stabilize the centrifugal force. Furthermore, the symmetrical distribution of the two cones avoids space fragmentation, improving separation efficiency and space utilization.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of gas-liquid separator technology, specifically to a gas-liquid separator for methanol production. Background Technology

[0002] In the methanol production process, a separator is needed to separate the crude methanol produced by the reaction from the unreacted syngas. Its working principle is mainly based on physical methods, such as gravity sedimentation, baffle separation, centrifugal separation or wire mesh separation, etc.

[0003] Centrifugal separation refers to the separation of gas and liquid by utilizing centrifugal force and density differences. When a mixed gas containing methanol droplets enters the separator tangentially (such as a channel with swirl vanes), it rotates at high speed along the inner wall, generating a strong centrifugal force. Since the density of methanol droplets is much greater than that of gases (such as hydrogen, carbon monoxide, etc.), under the action of centrifugal force, the droplets are thrown towards the inner wall of the separator until they lose kinetic energy and sink along the wall, eventually converging and being discharged. Meanwhile, the less dense gas flows upward through the pipes in the central area, achieving effective gas-liquid separation. This method is effective for separating droplets with smaller diameters (usually larger than a few micrometers) and is often combined with gravity sedimentation, wire mesh interception, and other methods to improve overall separation efficiency.

[0004] However, centrifugal gas-liquid separators have the following drawbacks: the swirl blades are usually disc-shaped, which occupy irregular space inside the separator, resulting in low utilization of internal space. The combination of centrifugation with other separation methods further exacerbates the above problems, and the separation effect of disc-shaped swirl blades still needs to be improved. Summary of the Invention

[0005] To overcome the above-mentioned defects, embodiments of the present invention provide a gas-liquid separator for methanol production, which solves the technical problems that the separation effect of the disc-shaped swirl blades of centrifugal gas-liquid separators still needs to be improved and that the utilization rate of the internal space of the separator is not high.

[0006] According to one aspect, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, comprising:

[0007] A cylindrical body, wherein an air outlet, a liquid outlet, and a feed inlet are provided on the cylindrical body;

[0008] At least two centrifugal cones are rotatably disposed within the cylinder and spaced apart circumferentially along the cylinder. The main axis of the centrifugal cone is set at an angle to the main axis of the cylinder. The inner wall of the centrifugal cone and the inner wall of the cylinder form a centrifugal cavity. Each centrifugal cavity is connected to the liquid outlet and the feed inlet. The diameter of the centrifugal cone gradually increases from the center of the cylinder to the outer periphery of the cylinder.

[0009] The centrifugal cone has an exhaust port near the small diameter end of the centrifugal cone, and each exhaust port is connected to the air outlet through an exhaust pipe.

[0010] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the centrifugal cone has a horizontally arranged shaft, and the centrifugal cone has a plurality of swirling blades arranged circumferentially inside for separating gas and liquid. The centrifugal cone has an end plate at its small diameter end, and the swirling blades extend from the large diameter end of the centrifugal cone to the center of the end plate. The exhaust port is located on the end plate and at the intersection of the extension ends of the plurality of swirling blades. The exhaust port is used to allow the gas separated in the centrifugal cone to enter the exhaust pipe, and the feed port faces the exhaust port.

[0011] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein a support ring is provided on the inner wall of the cylinder, and a ring groove is provided at one end of the support ring, and the large-diameter end of the centrifugal cone is slidably connected to the ring groove.

[0012] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the outer peripheral wall of the small-diameter end of the centrifugal cone is provided with ring teeth, and further includes:

[0013] A drive gear is rotatably disposed at the bottom of the cylinder and is used to drive the centrifugal cone to rotate. The shaft of the drive gear is arranged vertically, and the ring teeth of both centrifugal cones mesh with the drive gear.

[0014] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein an annular connecting groove is provided on the small-diameter end of the centrifugal cone, the swirl vane is slidably connected in the annular connecting groove, a second support ring is provided on the inner wall of the cylinder, one end of the second support ring is provided with an annular groove, a ring portion is slidably connected in the annular groove, the ring portion is integrally formed with the swirl vane and slidably connected to the large-diameter end of the centrifugal cone, so that the swirl vane can rotate relative to the centrifugal cone to clean the inner wall of the centrifugal cone;

[0015] The swirling blades have a centrifugal state and a clean state. When the swirling blades are in the centrifugal state, they can rotate synchronously with the centrifugal cone to centrifugally separate gas and liquid.

[0016] When the swirling blades are in a clean state, the swirling blades can rotate relative to the centrifugal cone to clean the inner wall of the centrifugal cone.

[0017] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the inner wall of the centrifugal cone, the inner wall of the ring, and the inner wall of the second support ring together form the centrifugal cavity.

[0018] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein a gas recovery port is provided on the side wall of the cylinder, and further includes:

[0019] The cover is provided on the outer peripheral wall of the cylinder and forms a secondary processing chamber between the cover and the cylinder. The gas recovery port, the liquid outlet and the feed inlet are all connected to the secondary processing chamber. The gas recovery port is used to allow methanol gas in the secondary processing chamber to flow back into the cylinder.

[0020] A feed pipe is connected to the feed inlet for feeding material into the centrifuge chamber, and the feed pipe extends through the cover.

[0021] A heating element is disposed in the secondary processing chamber and is used to heat the waste liquid flowing into the secondary processing chamber from the outlet, so as to evaporate the methanol gas in the waste liquid.

[0022] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein a control valve is provided at the bottom of the cover, and the control valve is used to control the discharge of waste liquid in the secondary treatment chamber.

[0023] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the top of the cylinder is provided with the gas outlet, the side wall of the cylinder is provided with the liquid outlet and the feed inlet, and the gas recovery port is set higher than the liquid outlet, and the liquid outlet is set higher than the control valve.

[0024] The beneficial effects of the embodiments of the present invention are as follows:

[0025] First, the disc-shaped swirl vanes are replaced with a centrifugal cone, which is rotatably connected to the inner wall of the cone. This allows the inner wall of the cone to directly enclose the centrifugal cavity (i.e., the main space for gas-liquid separation). This increases the area of ​​the gas-liquid separation surface within the centrifugal cavity and reduces the ineffective gap between the traditional disc-shaped swirl vanes and the cone wall. The reason is that the area of ​​the gas-liquid separation surface of the disc-shaped swirl vanes is only its surface area. However, within the same space, the area of ​​the inner wall of the centrifugal cone used for gas-liquid separation is still larger than that of the disc-shaped swirl vanes. Eliminating the gap between the disc-shaped swirl vanes and the cone wall improves the separation efficiency.

[0026] Secondly, the cross-sectional area of ​​the centrifugal cone gradually increases along the direction of the liquid outlet. When the liquid-containing gas enters the centrifugal chamber from the feed inlet, the gas undergoes a spiral centrifugal motion with the rotating cone. As the radius of rotation increases, the centrifugal force gradually increases, making it easier to throw small-diameter droplets against the cylinder wall and discharge them from the liquid outlet. Compared with the "short planar path" of disc blades, the separation time is longer, and the droplets have a greater chance of being captured. In addition, the centrifugal cone itself can rotate at high speed. The centrifugal force generated by its rotation acts directly on the gas-liquid mixture in the centrifugal chamber, rather than relying solely on the tangential entry velocity of the gas. This active rotation can stabilize the magnitude of the centrifugal force and avoid the problem of unstable centrifugal force caused by gas flow rate fluctuations in traditional disc blades.

[0027] Meanwhile, the two additional cones are symmetrically distributed along the axis of the cylinder, occupying a relatively regular internal space, thus avoiding the spatial fragmentation caused by the "planar occupation" of the disc-shaped swirl blades. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0029] Figure 1 This is a cross-sectional view of a gas-liquid separator for methanol production according to one embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the internal structure of the cylinder in the embodiment;

[0031] Figure 3 for Figure 1 Enlarged view of section A in the middle;

[0032] Figure 4 for Figure 1 Enlarged view of section B in the middle;

[0033] Figure 5 This is a schematic diagram of the internal structure of the cylinder in another embodiment of the present invention;

[0034] Figure 6 for Figure 5 The embodiment shows the assembly diagram of the centrifugal cone, swirl vanes, and support ring;

[0035] Figure 7 for Figure 5 Enlarged view of section C;

[0036] Figure 8 for Figure 5A cross-sectional view of the centrifugal cone in the embodiment.

[0037] In the diagram: 1. Cylinder; 101. Air outlet; 102. Liquid outlet; 103. Feed inlet; 104. Gas recovery inlet; 2. Centrifugal cone; 201. Exhaust port; 202. Annular connecting groove; 3. Centrifugal chamber; 4. Swirl blades; 5. Support ring one; 501. Annular groove one; 6. Ring teeth; 7. Drive gear; 8. Support ring two; 801. Annular groove two; 9. Ring section; 10. Cover; 11. Secondary treatment chamber; 12. Feed pipe. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0039] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0040] 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0043] 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.

[0044] The large-diameter end of centrifugal cone 2 is the end with the largest diameter, and the small-diameter end is the end with the smallest diameter, such as... Figure 1 As shown, taking the centrifugal cone 2 on the left as an example, the left end is the large diameter end, the right end is the small diameter end, and the end plate is the vertical plate on the right end.

[0045] like Figures 1-3 As shown, this is an embodiment of a gas-liquid separator for methanol production, comprising a cylindrical body 1, which is a vertically columnar container providing space for gas-liquid separation and serving as the "outer shell foundation" of the entire separator, supporting the centrifugal cone 2 and power components inside. An outlet 101 is provided at the top or upper part of the centrifugal cone 101, serving as a channel for the separated gas phase output and connecting to an external pipeline. An inlet 103 and a liquid outlet 102 are provided on the middle sidewall from top to bottom, serving as channels for the input of the gas-liquid mixture and the output of the separated liquid phase. The centrifugal cone 2 is a frustoconical cylinder. The structure is rotatably connected to the inner wall of the cylinder 1 via bearings or seals (it can rotate around a horizontal axis). The inner wall of the centrifugal cone 2 and the inner wall of the cylinder 1 form a conical centrifugal cavity 3, which serves as the "main space" for centrifugal separation. It connects the feed inlet 103 and the liquid outlet 102. The cross-sectional area of ​​the centrifugal cone 2 gradually increases along the direction close to the liquid outlet 102 (i.e., the "large end of the cone" faces the liquid outlet 102), so that after high-speed rotation, it can throw small-diameter droplets toward the inner wall of the centrifugal cone 2 until the cylinder wall, and finally discharge them from the liquid outlet 102 for waste liquid recovery.

[0046] In addition, the two centrifugal cones 2 are symmetrically distributed along the vertical axis of the cylinder 1, and the rotating shaft is set horizontally. This eliminates the gap between the blades and the cylinder wall of the traditional disc type, increases the effective separation area (i.e. the entire inner wall of the cone), and can also adapt to the space of the cylinder 1, avoid spatial fragmentation, and make the gas-liquid flow smoother.

[0047] Traditional disc-shaped swirl blades 4 are flat / arc plates with large gaps between them and the inner wall of the cylinder 1 (the blade edges cannot fit against the cylinder wall). Furthermore, airflow channels need to be reserved between the blades, which occupies a large amount of irregular space (such as the gap between the blades and the cylinder wall). When superimposed with other separation structures (such as gravity settling zones), the effective space is further compressed, resulting in a low effective separation area ratio and space fragmentation. The gas-liquid mixture is easily discharged without being fully separated, and it is easy to rely on the gas and liquid flow rates to form centrifugal force. When the flow rate fluctuates, the centrifugal force is unstable, and small-diameter droplets are discharged with the gas phase before being thrown against the cylinder wall, resulting in low separation accuracy and efficiency.

[0048] The improved double-horizontal cone structure solves the above-mentioned drawbacks. The centrifugal cone 2 is rotatably connected to the inner wall of the cylinder 1, so that its inner wall and the inner wall of the cylinder 1 directly form the centrifugal cavity 3, which increases the area of ​​the gas-liquid separation surface in the centrifugal cavity 3. This reduces the ineffective gap between the disc-shaped swirling blades 4 and the cylinder wall. Moreover, the double cones are symmetrically distributed along the axis of the cylinder 1, occupying a more regular internal space, avoiding the space fragmentation caused by the "planar occupation" of the disc-shaped swirling blades 4. In addition, the cross-sectional area of ​​the centrifugal cone 2 gradually increases along the direction of the liquid outlet 102. When the liquid-containing gas enters the centrifugal cavity 3 from the feed inlet 103, the gas undergoes a spiral centrifugal motion with the rotating cone. As the radius of rotation increases, the centrifugal force gradually increases, making it easier to throw small-diameter droplets toward the cylinder wall and discharge them from the liquid outlet 102. Compared with the "short planar path" of the disc-shaped blades, the separation time is longer, and the droplets have a more sufficient chance to be captured.

[0049] It is worth mentioning that the feed inlet 103 faces the side of the central exhaust port 201 of the centrifugal cone 2 so that the gas and liquid are fully separated by the centrifugal cone 2 and the swirl blades 4.

[0050] Furthermore, several swirling blades 4 (circumferentially distributed, radially or at a certain angle) are welded or integrally formed on the inner wall of the centrifugal cone 2. These blades guide the gas-liquid mixture entering the centrifugal chamber 3 to form a swirling flow, thereby increasing the centrifugal motion path and extending the centrifugation time, allowing sufficient opportunity for droplet separation. Specifically, these blades can be straight-blade swirling blades 4 or spiral-twisted swirling blades 4. For straight-blade swirling blades 4, they are straight plates, and the length of the blades is determined according to the size of the centrifugal cone 2, extending from one end of the centrifugal cone 2 near the inlet 103 to the vicinity of the outlet 201. This ensures that the airflow can be directly and effectively guided to generate a swirling flow without excessively obstructing the airflow. This structure is relatively simple and does not require complex processing techniques during manufacturing, thus reducing production costs. For spiral-twisted blades... The swirling twisted blade 4 has an overall spiral twisted shape, the degree of which is determined by design requirements and is usually gradually varied. It closely conforms to the inner wall contour of the centrifugal cone 2. This type of blade is generally manufactured by integral molding to ensure the stability of its structure and the accuracy of its twisted shape. This spiral twisted structure enables the gas-liquid mixture to generate not only circumferential swirling motion when passing through the blade, but also complex three-dimensional flow in the axial and radial directions, further enhancing the effect of centrifugal force. It also has better adaptability to gas-liquid mixtures with different flow rates and velocities. When the flow rate or velocity of the gas-liquid mixture changes, it can still effectively guide the airflow to form a stable swirling flow, ensuring the stability of the gas-liquid separation effect and reducing the problem of decreased separation efficiency due to changes in operating conditions.

[0051] As a further embodiment, such as Figures 2-4 As shown, for the rotating structure of the centrifugal cone 2 and the inner wall of the cylinder 1, a support ring 5 is added, which is an annular protrusion fixed to the inner wall of the cylinder 1 (in conjunction with...). Figure 2 The ring groove 501 is an annular groove opened on the end face of the support ring near the axis of the cylinder 1 (its cross section is adapted to the end structure of the centrifugal cone 2). Specifically, the edge of the end of the centrifugal cone 2 near the liquid outlet 102 (the large cone end) is embedded in the ring groove 501 to form a sliding connection, so that the centrifugal cone 2 can rotate around its own horizontal axis. At the same time, the ring groove 501 can be a T-shaped or other structure to restrict the axial displacement of the centrifugal cone 2 and retain only the rotational degree of freedom.

[0052] The aforementioned support ring 5 can stabilize the cone's posture and bear axial force. Traditional disc-type swirl blades 4 are fixed only at both ends (such as by welding / bolts), and are prone to displacement due to vibration during high-speed rotation. However, the support ring 5 limits the "large cone end" of the cone through the ring groove 501, so that the axis of the cone is stable when it rotates (the horizontal axis does not deviate), avoiding the disruption of the gas-liquid separation path caused by the cone shaking. Moreover, after the gas-liquid mixture enters the centrifuge chamber 3, it generates an axial thrust on the cone (towards the liquid outlet 102). The ring groove of the support ring can bear this thrust, preventing the cone from moving axially and ensuring the structural reliability of long-term operation.

[0053] Furthermore, considering the drive structure of the double horizontal cone, based on the structure of the support ring 5 mentioned above, a drive gear 7 driven by a motor can be added to the inner bottom of the cylinder 1, and an annular rack is welded or integrally formed on the outer wall of the centrifugal cone 2 at the end away from the liquid outlet 102 (small cone end). The drive gear 7 can be a cylindrical gear, and its shaft is set vertically and located in the middle of the annular teeth 6 of the two centrifugal cones 2. Thus, the drive gear 7 can mesh with the two annular teeth 6 at the same time, so as to realize the synchronous rotation of the two centrifugal cones 2.

[0054] As a further embodiment, such as Figures 5-8 As shown, the swirl vane 4 and the centrifugal cone 2 are set separately. Both are driven by a power source to achieve synchronous or relative rotation, so as to switch the swirl vane 4 between centrifugal state and cleaning state. Specifically, the swirl vane 4 abuts against the inner wall of the centrifugal cone 2. When the swirl vane 4 is in the centrifugal state, the swirl vane 4 can rotate synchronously with the centrifugal cone 2 to centrifuge and separate gas and liquid. When the swirl vane 4 is in the cleaning state, the swirl vane 4 can rotate relative to the centrifugal cone 2 to clean the inner wall of the centrifugal cone 2.

[0055] Furthermore, the complex operation of traditional maintenance, which requires stopping the machine to remove the blades, is no longer necessary. Self-cleaning can be achieved simply by changing the rotation speed or direction of the swirl blades.

[0056] For the connection structure between the split swirl blade 4 and the centrifugal cone 2, an annular connecting groove 202 is opened on the bottom wall of the centrifugal cone 2, and the ball can be slidably connected. Specifically, a corresponding ball groove can be opened at the position of the annular connecting groove 202 for each swirl blade 4, and a ball is rolled in the ball groove so that the ball is assembled in the annular connecting groove 202 to ensure the sliding connection and coaxial rotation between the swirl blade 4 and the centrifugal cone 2.

[0057] Furthermore, considering the rotating structure of the centrifugal cone 2 and the inner wall of the cylinder 1, and taking into account the driving structure of the swirl blades 4, a second support ring 8 is added (its function and structure are similar to the first support ring 5). This second support ring is an annular protrusion fixed to the inner wall of the cylinder 1 (in conjunction with...). Figure 5The ring (in a stepped ring shape) extends towards the axis of the cylinder 1 and has an annular groove 801. The ring 9, integrally formed with the swirl vane 4, is slidably connected to the annular groove 801. The ring 9 is also slidably connected to the end of the centrifugal cone 2 near the outlet 102 (e.g., a slider groove connection). This allows the inner wall of the centrifugal cone 2, the inner wall of the ring 9, and the inner wall of the supporting ring 8 to jointly form a centrifugal cavity 3. On the one hand, this allows for normal centrifugal separation within the centrifugal cavity 3, as both can rotate synchronously at high speed and rotate relative to each other to scrape away impurities within the centrifugal cone 2. On the other hand, as... Figure 8 As shown, a gear and a motor can be added inside the support ring 2 8. The gear meshes with the teeth of the ring 9 to actively drive its rotation, providing stable support for the drive component of the swirl blade 4.

[0058] As a further embodiment, such as Figure 5 , Figure 8 As shown, during the operation of the methanol separator, methanol may remain in the waste liquid. Direct discharge would result in methanol loss and even environmental pollution. Therefore, a cover 10 is added to form a secondary treatment chamber 11, in which the waste liquid is heated to evaporate methanol gas and then recovered. Specifically, a gas recovery port 104 is provided on the side wall of the cylinder 1, and a vertical cylindrical cover 10 is installed on the outer wall of the cylinder 1 so that the inner wall of the cover 10 and the outer wall of the cylinder 1 form the secondary treatment chamber 11. The gas recovery port 104, the liquid outlet 102, and the feed inlet 103 are all connected to the secondary treatment chamber 11. The gas recovery port 104 can recover the methanol gas in the secondary treatment chamber 11 back into the cylinder 1. Waste liquid discharged from outlet 102 can enter secondary treatment chamber 11; at the same time, a feed pipe 12 penetrating through the cover 10 is added to supply material into centrifuge chamber 3. The feed pipe 12 is a tubular structure, with one end connected to feed port 103 to supply material into centrifuge chamber 3, and the other end penetrating through cover 10 to extend to the outside. Heating elements (such as electric heating tubes or steam coils) are arranged in secondary treatment chamber 11 (they can be attached to the outer wall of cylinder 1 or suspended in the chamber) to heat the waste liquid in secondary treatment chamber 11 to evaporate methanol gas in the waste liquid. The control valve is a controllable opening (such as an electric valve / manual valve) set at the bottom of cover 10 to control the discharge of waste liquid in secondary treatment chamber 11.

[0059] The above structure constructs a closed-loop methanol recovery system. The waste liquid discharged from the outlet 102 enters the secondary treatment chamber 11. The heating element heats the secondary treatment chamber 11, causing the residual methanol in the waste liquid to evaporate into gas. The gas returns to the cylinder 1 through the gas recovery port 104 and participates in gas-liquid separation again (a guide surface can be formed on the cover 10 near the gas recovery port 104 to facilitate the recovery of methanol gas). After the waste liquid in the secondary treatment chamber 11 evaporates methanol through heating, the remaining waste liquid can be discharged periodically through the control valve (the control valve accumulates waste liquid when closed and discharges liquid quickly when open). Therefore, the gas recovery port 104 is set higher than the outlet 102, and the outlet 102 is set higher than the control valve to ensure that the above functions work properly.

[0060] Working principle: First, the gas-liquid mixture is fed into the centrifuge chamber 3 through the feed pipe 12. At this time, the drive gear 7 drives the centrifuge cone 2 to rotate actively, and the swirling blades 4 rotate synchronously with the centrifuge cone 2 on the same axis (centrifugal state). The spiral or straight blades guide the gas-liquid mixture to form a stable swirling flow. The centrifugal force throws the methanol droplets toward the inner wall of the centrifuge cone 2. The droplets slide down the wall and are discharged through the liquid outlet 102 into the secondary treatment chamber 11. The gas phase gathers in the center of the centrifuge cone 2 and is discharged through the exhaust port 201 and pipeline to the gas outlet 101, completing the initial gas-liquid separation.

[0061] If a decrease in separation efficiency is detected during long-term operation, the system switches to a cleaning state: by adjusting the speed or direction of the swirl vanes 4, the swirl vanes 4 rotate in the opposite direction / differential speed relative to the centrifugal cone 2, like a "brush" to scrape off the attached dirt, ensuring the cleanliness of the inner wall of the centrifugal chamber 3, ensuring subsequent separation efficiency, without the need to stop disassembly throughout the process, maintaining production continuity.

[0062] Secondly, the methanol-containing waste liquid discharged from the outlet 102 enters the secondary treatment chamber 11. The heating element is activated to heat and evaporate the waste liquid—the residual methanol turns into gas, returns to the cylinder 1 through the gas recovery port 104, and is recovered from the gas outlet 101. After the methanol has been fully evaporated, the control valve at the bottom of the secondary treatment chamber 11 is opened intermittently to discharge the waste liquid.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A gas-liquid separator for methanol production, characterized in that, include: The cylinder (1) is provided with an air outlet (101), a liquid outlet (102) and a feed inlet (103). At least two centrifugal cones (2) are rotatably disposed inside the cylinder (1) and spaced apart along the circumference of the cylinder (1). The main axis of the centrifugal cone (2) is set at an angle to the main axis of the cylinder (1). The inner wall of the centrifugal cone (2) and the inner wall of the cylinder (1) form a centrifugal cavity (3). Each centrifugal cavity (3) is connected to the liquid outlet (102) and the feed inlet (103). The diameter of the centrifugal cone (2) gradually increases from the center of the cylinder (1) to the outer periphery of the cylinder (1). The centrifugal cone (2) is provided with an exhaust port (201) near the small diameter end of the centrifugal cone (2), and each exhaust port (201) is connected to the air outlet (101) through an exhaust pipe; The cylinder (1) has a gas recovery port (104) on its side wall, and also includes: Cover (10), the cover (10) is installed on the outer peripheral wall of the cylinder (1) and forms a secondary processing chamber (11) between the cover (10) and the cylinder (10). The gas recovery port (104), the liquid outlet (102) and the feed inlet (103) are all connected to the secondary processing chamber (11). The gas recovery port (104) is used to allow methanol gas in the secondary processing chamber (11) to flow back into the cylinder (1). Feed pipe (12), the feed pipe (12) is connected to the feed port (103) and is used to feed material into the centrifuge chamber (3), and the feed pipe (12) passes through the cover (10). A heating element is provided in the secondary processing chamber (11) to heat the waste liquid flowing from the outlet (102) into the secondary processing chamber (11) so as to evaporate the methanol gas in the waste liquid.

2. The gas-liquid separator for methanol production according to claim 1, characterized in that, The centrifugal cone (2) has a horizontally arranged shaft. The centrifugal cone (2) has several swirling blades (4) arranged around its circumference for separating gas and liquid. The centrifugal cone (2) has an end plate at its small diameter end. The swirling blades (4) extend from the large diameter end of the centrifugal cone (2) to the center of the end plate. The exhaust port (201) is located on the end plate and at the intersection of the extension ends of the swirling blades (4). The exhaust port (201) is used to allow the gas separated in the centrifugal cone (2) to enter the exhaust pipe. The feed inlet (103) faces the exhaust port (201).

3. A gas-liquid separator for methanol production according to claim 2, characterized in that, The inner wall of the cylinder (1) is provided with a support ring (5), and one end of the support ring (5) is provided with a ring groove (501). The large diameter end of the centrifugal cone (2) is slidably connected in the ring groove (501).

4. A gas-liquid separator for methanol production according to claim 3, characterized in that, The centrifugal cone (2) has ring teeth (6) on its outer peripheral wall at the small diameter end, and also includes: The drive gear (7) is rotatably located at the bottom of the cylinder (1) and is used to drive the centrifugal cone (2) to rotate. The shaft of the drive gear (7) is arranged vertically, and the ring teeth (6) of the two centrifugal cones (2) mesh with the drive gear (7).

5. A gas-liquid separator for methanol production according to claim 2, characterized in that, An annular connecting groove (202) is provided on the small diameter end of the centrifugal cone (2). The swirling blade (4) is slidably connected in the annular connecting groove (202). A second support ring (8) is provided on the inner wall of the cylinder (1). An annular groove (801) is provided at one end of the second support ring (8). An annular part (9) is slidably connected in the annular groove (801). The annular part (9) is integrally formed with the swirling blade (4) and slidably connected to the large diameter end of the centrifugal cone (2) so that the swirling blade (4) can rotate relative to the centrifugal cone (2) to clean the inner wall of the centrifugal cone (2). The swirling blade (4) has a centrifugal state and a clean state. When the swirling blade (4) is in the centrifugal state, the swirling blade (4) can rotate synchronously with the centrifugal cone (2) to centrifugally separate gas and liquid. When the swirling blade (4) is in a clean state, the swirling blade (4) can rotate relative to the centrifugal cone (2) to clean the inner wall of the centrifugal cone (2).

6. A gas-liquid separator for methanol production according to claim 5, characterized in that, The inner wall of the centrifugal cone (2), the inner wall of the ring (9), and the inner wall of the second support ring (8) together form the centrifugal cavity (3).

7. A gas-liquid separator for methanol production according to claim 1, characterized in that, The bottom of the cover (10) is provided with a control valve, which is used to control the discharge of waste liquid in the secondary treatment chamber (11).

8. A gas-liquid separator for methanol production according to claim 7, characterized in that, The top of the cylinder (1) is provided with the air outlet (101), the side wall of the cylinder (1) is provided with the liquid outlet (102) and the feed inlet (103), and the gas recovery port (104) is set higher than the liquid outlet (102), and the liquid outlet (102) is set higher than the control valve.

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