Gas-liquid separator for methanol production

Abstract

The invention relates to the technical field of gas-liquid separators, and provides a gas-liquid separator for methanol production, which is characterized in that a cylinder is provided with a gas outlet, a liquid outlet and a feed inlet; the two centrifugal conical cylinders are rotationally arranged in the cylinder body and rotationally connected with the inner wall of the cylinder body, so that a centrifugal cavity is defined by the inner walls of the centrifugal conical cylinders and the inner wall of the cylinder body, the liquid outlet and the feeding port are communicated with the centrifugal cavity, the sectional areas of the centrifugal conical cylinders are gradually increased in the direction close to the liquid outlet, and the two centrifugal conical cylinders are symmetrically arranged; the centrifugal conical cylinder is further provided with exhaust ports, and the two exhaust ports can communicate with the air outlet through pipelines. A disc-shaped rotational flow blade is changed into a centrifugal conical barrel which is rotationally connected with the barrel wall to define a centrifugal cavity, so that the separation acting surface is enlarged, and invalid gaps are reduced; the sectional area of the conical cylinder is increased along the liquid outlet, a separation path is prolonged, and centrifugal force is enhanced and stabilized through active rotation; and the two conical cylinders are symmetrically distributed, space fragmentation is avoided, and the separation efficiency and the space utilization rate are improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of gas-liquid separators, and in particular, to a gas-liquid separator for methanol production. Background Art

[0002] During the methanol production process, a separator is required to separate the crude methanol generated by the reaction from the incompletely reacted synthesis gas. Its working principle is mainly based on physical methods, such as gravity sedimentation, baffle separation, centrifugal separation or wire mesh separation, etc.

[0003] Among them, centrifugal separation refers to the use of centrifugal force and density difference to achieve gas-liquid separation. When the mixed gas containing methanol droplets enters the interior of the separator (such as a channel with swirl blades) in a tangential direction, it will rotate at high speed along the inner wall, generating a strong centrifugal force. Since the density of methanol droplets is much greater than the density of gases (such as hydrogen, carbon monoxide, etc.), under the action of centrifugal force, the droplets will be thrown to the inner wall of the separator until they lose kinetic energy and sink along the wall, eventually converging and being discharged, while the gas with lower density will flow upward through the pipeline in the central area, realizing effective separation of gas and liquid; this method has a better separation effect on droplets with smaller particle size (usually larger than a few microns), and is often combined with gravity sedimentation, wire mesh interception and other methods to improve the overall separation efficiency.

[0004] However, centrifugal gas-liquid separators have the following disadvantages: the swirl blades are usually disc-shaped, occupying irregular space within the separator, resulting in low internal space utilization. The combination of centrifugal separation with other separation methods further aggravates 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, an embodiment of the present invention provides a gas-liquid separator for methanol production, which solves the technical problems in the related art that the separation effect of the disc-shaped swirl blades of the centrifugal gas-liquid separator still needs to be improved and the internal space utilization rate 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: A cylinder body, wherein the cylinder body is provided with an air outlet, a liquid outlet and a feed inlet; At least two centrifugal cones, both of which are rotatably disposed within the barrel and spaced apart along the circumference of the barrel, the main axis of the centrifugal cone being arranged at an angle to the main axis of the barrel, the inner wall of the centrifugal cone and the inner wall of the barrel forming a centrifugal cavity, each of the centrifugal cavities being connected to the liquid outlet and the feed inlet, and the diameter of the centrifugal cone gradually increasing from the center of the barrel to the outer periphery of the barrel; The centrifugal cone is provided with an exhaust port close to the small-diameter end of the centrifugal cone, and each of the exhaust ports is connected to the air outlet through an exhaust pipeline.

[0007] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the rotating shaft of the centrifugal cone is arranged horizontally, and a plurality of swirl blades for separating gas and liquid are provided along the circumference of the inside of the centrifugal cone, and an end plate is provided at the small diameter end of the centrifugal cone, and the swirl blades extend from the large diameter end of the centrifugal cone to the center of the end plate. The exhaust port is provided on the end plate and is located at the intersection of the extended ends of several swirl blades. The exhaust port is used to supply the gas separated in the centrifugal cone to enter the exhaust pipe, and the feed port is facing the side of the exhaust port.

[0008] 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, an annular groove is provided at one end of the support ring, and the large diameter end of the centrifugal cone is slidably connected to the annular groove.

[0009] 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 comprises: A driving gear is rotatably arranged at the bottom of the cylinder and is used to drive the centrifugal cone to rotate. The rotating shaft of the driving gear is arranged vertically, and the ring teeth of the two centrifugal cones are engaged with the driving gear.

[0010] 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, and the swirl blade is slidably connected to the annular connecting groove. A second support ring is provided on the inner wall of the cylinder, and one end of the second support ring is provided with a second annular groove. A ring portion is slidably connected to the second annular groove. The ring portion is integrally formed with the swirl blade and is slidably connected to the large-diameter end of the centrifugal cone, so that the swirl blade can rotate relative to the centrifugal cone to clean the inner wall of the centrifugal cone. The swirl blade has a centrifugal state and a cleaning state. When the swirl blade is in the centrifugal state, the swirl blade can rotate synchronously with the centrifugal cone to centrifugally separate gas and liquid; When the swirl blade is in a cleaning state, the swirl blade can rotate relative to the centrifugal cone to clean the inner wall of the centrifugal cone.

[0011] For example, in at least one embodiment of the present invention, a gas-liquid separator for methanol production is provided, wherein the inner wall of the centrifugal cone, the inner wall of the ring portion, and the inner walls of the support ring together enclose the centrifugal chamber.

[0012] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the side wall of the cylinder is provided with a gas recovery port, and further comprises: a cover body, the cover body being arranged on the outer peripheral wall of the cylinder and forming a secondary processing chamber between the cover body and the cover body, the gas recovery port, the liquid outlet and the feed port being all connected to the secondary processing chamber, and the gas recovery port being used to allow the methanol gas in the secondary processing chamber to flow back into the cylinder; a feed pipe connected to the feed port and used for feeding material into the centrifugal chamber, and the feed pipe passes through the cover; A heating element is provided in the secondary treatment chamber and is used for heating the waste liquid flowing into the secondary treatment chamber from the liquid outlet to evaporate methanol gas in the waste liquid.

[0013] 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 body, and the control valve is used to control the discharge of waste liquid in the secondary treatment chamber.

[0014] For example, at least one embodiment of the present invention provides a gas-liquid separator for methanol production, wherein the gas outlet is provided on the top of the cylinder, the liquid outlet and the feed port are provided on the side wall of the cylinder, and the gas recovery port is arranged higher than the liquid outlet, and the liquid outlet is arranged higher than the control valve.

[0015] The beneficial effects of the embodiments of the present invention are: First, the disc-shaped swirl blades are replaced with centrifugal cones and rotatably connected to the inner wall of the cylinder so that their inner walls directly enclose a centrifugal cavity (i.e., the main space for separating gas and liquid). This increases the area of ​​the gas-liquid separation surface in the centrifugal cavity and reduces the ineffective gap between the traditional disc-shaped swirl blades and the cylinder wall. The reason is that the area of ​​the gas-liquid separation surface of the disc-shaped swirl blades is only its surface area, but in the same space, the area of ​​the inner wall of the centrifugal cone used for separating gas and liquid is still larger than that of the disc-shaped swirl blades. Therefore, the gap between the disc-shaped swirl blades and the cylinder wall is eliminated, thereby improving the separation efficiency.

[0016] 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 port, the gas performs spiral centrifugal motion with the rotating cone. As the rotation radius increases, the centrifugal force can be gradually enhanced, making it easier to throw small-particle droplets to the cylinder wall and discharge them from the liquid outlet. Compared with the "flat short path" of the disc blade, the separation time is longer and the droplets have more opportunities to be captured. In addition, the centrifugal cone itself can rotate at high speed, and the centrifugal force generated by its rotation directly acts on the gas-liquid mixture in the centrifugal chamber, rather than relying solely on the tangential entry speed of the gas itself. This active rotation can stabilize the centrifugal force and avoid the centrifugal force instability problem caused by gas flow rate fluctuations in traditional disc blades.

[0017] At the same time, the two additional cones are symmetrically distributed along the axis of the cylinder, occupying a relatively regular space inside the cylinder, avoiding the space fragmentation caused by the "plane occupation" of the disc-shaped swirl blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0019] Figure 1 This is a cross-sectional view of a gas-liquid separator for methanol production according to one embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal structure of the cylinder in the embodiment; Figure 3 for Figure 1 Enlarged view of part A in the middle; Figure 4 for Figure 1 Enlarged view of middle part B; Figure 5 This is a schematic diagram of the internal structure of the cylinder in another embodiment of the present invention; Figure 6 for Figure 5 FIG2 shows the coordination of the centrifugal cone, swirl blades and support ring in the embodiment of FIG2; Figure 7 for Figure 5 Enlarged view of middle C part; Figure 8 for Figure 5 A cross-sectional view of a centrifugal cone in an embodiment of the present invention.

[0020] In the figure: 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 1; 501. Ring groove 1; 6. Ring gear; 7. Drive gear; 8. Support ring 2; 801. Ring groove 2; 9. Ring portion; 10. Cover; 11. Secondary treatment chamber; 12. Feed pipe. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0022] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0023] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0024] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] The large diameter end of the centrifugal cone 2 is the end with the largest diameter, and the small diameter end is the end with the smallest diameter. Figure 1 As shown, taking the left centrifugal cone 2 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 at the right end.

[0028] like Figures 1 to 3As shown, it shows a gas-liquid separator for methanol production in one embodiment of the present invention, including a cylinder 1 in the form of a vertical columnar container, which provides space for gas-liquid separation and serves as the "shell foundation" of the entire separator to provide support for the centrifugal cone 2 and power components therein. The top or upper part of the cylinder is provided with a gas outlet 101, which serves as a channel for the output of the gas phase after separation and is connected to an external pipeline. The middle side wall is provided with a feed inlet 103 and a liquid outlet 102 from top to bottom, which serve as channels for the input of the gas-liquid mixture and the output of the liquid phase after separation; the centrifugal cone 2 adopts a frustum-shaped cylinder. 1 structure, which is rotatably connected to the inner wall of the cylinder 1 through bearings or seals (rotatable around a horizontal axis), and then the inner wall of the centrifugal cone 2 and the inner wall of the cylinder 1 can enclose a conical centrifugal chamber 3, which serves as the "main space" for centrifugal separation. It is connected to the feed port 103 and the liquid outlet 102, and the cross-sectional area of ​​the centrifugal cone 2 gradually increases towards the liquid outlet 102 (that is, the "large end of the cone" faces the liquid outlet 102), so that after high-speed rotation, small-sized droplets are thrown toward the inner wall of the centrifugal cone 2 and even the cylinder wall, and finally discharged from the liquid outlet 102 for waste liquid recovery.

[0029] 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, eliminating the gap between the traditional disc-type blades and the cylinder wall, increasing the effective separation area (that is, the entire inner wall of the cone) and being able to adapt to the space of the cylinder 1, avoiding space fragmentation and making the gas-liquid flow smoother.

[0030] The traditional disc-shaped swirl blade 4 is a flat / arc-shaped plate with a large gap between it and the inner wall of the cylinder 1 (the edge of the blade cannot fit the cylinder wall), and air flow channels need to be reserved between the blades, which will occupy a large amount of irregular space (such as the gap between the blade and the cylinder wall). When superimposed with other separation structures (such as the gravity sedimentation area), the effective space is further compressed, resulting in a low proportion of effective separation area and spatial fragmentation. The gas-liquid mixture is easily discharged without being fully separated, and it is easy to rely on the gas-liquid flow rate itself to form centrifugal force. When the flow rate fluctuates, the centrifugal force is unstable, and small particle size droplets are discharged with the gas phase before being thrown to the cylinder wall, resulting in low separation accuracy and efficiency.

[0031] The improved double-horizontal cone structure can solve 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 enclose a centrifugal chamber 3, which increases the area of ​​the gas-liquid separation surface in the centrifugal chamber 3 and can reduce the ineffective gap between the above-mentioned disc-shaped swirl blades 4 and the cylinder wall. The double cones are symmetrically distributed along the axis of the cylinder 1, occupying a relatively regular space in the cylinder, avoiding the spatial fragmentation caused by the "plane occupation" of the disc-shaped swirl 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 chamber 3 from the feed port 103, the gas performs spiral centrifugal motion with the rotating cone. As the rotation radius increases, the centrifugal force can be gradually enhanced, making it easier to throw small-particle droplets to the cylinder wall and discharge them from the liquid outlet 102. Compared with the "planar short path" of the disc-shaped blades, the separation time is longer and the droplets have more opportunities to be captured.

[0032] It is worth mentioning that the feed port 103 faces one side of the central exhaust port 201 of the centrifugal cone 2 so that the gas and liquid can be fully centrifugally separated by the centrifugal cone 2 and the swirl blades 4.

[0033] Furthermore, a plurality of swirl blades 4 (uniformly distributed around the circumference, radially or inclined at a certain angle) are welded or integrally formed on the inner wall of the centrifugal cone 2 to guide the gas-liquid mixture entering the centrifugal chamber 3 to form a swirl, so as to increase the centrifugal motion path, increase the centrifugal time, and give the droplets ample opportunities to be separated; specifically, they can be straight-leaf swirl blades 4 or spirally twisted swirl blades 4. For the straight-leaf swirl blades 4, they are in the shape of a straight plate, and the length of the blades is determined according to the size of the centrifugal cone 2. They extend from one end of the centrifugal cone 2 close to the feed port 103 to near the end close to the exhaust port 201 to ensure that the airflow can be directly and effectively guided to generate a swirl without excessively hindering the flow of the airflow. This structure is relatively simple and does not require complex processing technology during the production process, which can reduce production costs; for the spiral twisted swirl blades 4, they are in the shape of a straight plate, and the length of the blades is determined according to the size of the centrifugal cone 2. The spirally twisted swirl blade 4 has a spirally twisted shape as a whole. The degree of twisting is determined according to the design requirements, usually changing gradually, and closely fitting the inner wall contour of the centrifugal cone 2. This blade is generally manufactured in an integral molding manner to ensure the stability of its structure and the accuracy of the twisted shape. The spirally twisted structure can enable the gas-liquid mixture to not only produce a circumferential swirl motion when passing through the blade, but also produce a complex three-dimensional flow in the axial and radial directions, further enhancing the effect of the centrifugal force, and has better adaptability to gas-liquid mixtures with different flow rates and flow rates. When the flow rate or flow rate of the gas-liquid mixture changes, it can still effectively guide the airflow to form a stable swirl, thereby ensuring the stability of the gas-liquid separation effect and reducing the problem of decreased separation efficiency due to changes in working conditions.

[0034] As a further example, Figures 2 to 4As shown, for the rotation 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 (combined with Figure 2 , in the form of an annular step), extending toward the axis of the cylinder 1, the annular groove 1 501 is an annular groove (its cross section is adapted to the end structure of the centrifugal cone 2) provided on the end face of the support ring close to the axis of the cylinder 1. Specifically, the edge of one end (large cone end) of the centrifugal cone 2 close to the liquid outlet 102 is embedded in the annular groove 1 501 to form a sliding connection, so that the centrifugal cone 2 can rotate around its own horizontal axis. At the same time, the annular groove 1 501 can be a T-shaped structure to limit the axial displacement of the centrifugal cone 2 and only retain the rotational freedom.

[0035] The above-mentioned support ring 5 can stabilize the posture of the cone and bear the axial force. The traditional disc-type swirl blade 4 is only fixed at both ends (such as welding / bolts), and is easily offset due to vibration when rotating at high speed. The support ring 5 limits the "large cone end" of the cone through the annular groove 501, so that the axis of the cone is stable when the cone rotates (the horizontal axis does not deviate), avoiding the disorder of the gas-liquid separation path due to the shaking of the cone; and after the gas-liquid mixture enters the centrifugal chamber 3, an axial thrust is generated on the cone (towards the liquid outlet 102), and the annular groove of the support ring can bear the thrust, preventing the cone from axial movement, thereby ensuring the structural reliability of long-term operation.

[0036] Further, considering the driving structure of the double horizontal cones, on the basis of the structure of the above-mentioned support ring 5, a motor-driven driving gear 7 can be added to the inner bottom of the cylinder 1, and a ring rack can be welded or integrally formed on the outer wall of the end (small cone end) of the centrifugal cone 2 away from the liquid outlet 102. The driving gear 7 can be a cylindrical gear, and its rotating shaft is arranged vertically and located between the ring teeth 6 of the two centrifugal cones 2. Then, the driving gear 7 can engage with the two ring teeth 6 at the same time to realize the synchronous rotation of the two centrifugal cones 2.

[0037] As a further example, Figures 5 to 8 As shown, the swirl blades 4 and the centrifugal cone 2 are separately arranged, and both are achieved through a power source to achieve synchronous or relative rotation, so that the swirl blades 4 can switch between the centrifugal state and the cleaning state; specifically, the swirl blades 4 abut against the inner wall of the centrifugal cone 2, and when the swirl blades 4 are in the centrifugal state, the swirl blades 4 can rotate synchronously with the centrifugal cone 2 to centrifugally separate the gas and liquid; when the swirl blades 4 are in the cleaning state, the swirl blades 4 can rotate relative to the centrifugal cone 2 to clean the inner wall of the centrifugal cone 2.

[0038] Furthermore, the traditional complicated operation of maintenance which requires stopping the machine and removing the blades no longer requires stopping the machine. Self-cleaning can be achieved by simply changing the rotation speed or direction of the swirl blades 4.

[0039] For the connection structure between the swirl blade 4 and the centrifugal cone 2 after separation, the annular connecting groove 202 provided on the inner bottom wall of the centrifugal cone 2 is adopted, and the ball sliding connection can be used. Specifically, a corresponding ball groove can be provided at the position corresponding to the annular connecting groove 202 of each swirl blade 4, and a ball is installed in the ball groove for rolling, so that the ball is assembled in the annular connecting groove 202 to ensure the sliding connection between the swirl blade 4 and the centrifugal cone 2, and the coaxial rotation; Furthermore, in view of the rotation structure of the centrifugal cone 2 and the inner wall of the cylinder 1, and taking into account the driving structure of the swirl blade 4, a second support ring 8 is added (its function and structure are similar to the support ring 1 5), which is an annular protrusion fixed to the inner wall of the cylinder 1 (combined with Figure 5 , in the form of an annular step), extending toward the axis of the cylinder 1, and providing a second annular groove 801, and the ring portion 9 integrally formed with the swirl blade 4 is slidably connected in the second annular groove 801, and the ring portion 9 is slidably connected to the end of the centrifugal cone 2 near the liquid outlet 102 (for example, a slider groove connection), so that the inner wall of the centrifugal cone 2, the inner wall of the ring portion 9 and the inner wall of the second support ring 8 together enclose the centrifugal chamber 3. On the one hand, centrifugal separation can be normally performed in the centrifugal chamber 3, and the two can rotate synchronously at high speed and can rotate relative to each other to scrape off impurities in the centrifugal cone 2; on the other hand, as Figure 8 As shown, gears and motors can be added to the support ring 8, and the gears are engaged with the teeth of the ring portion 9 to actively drive its rotation, providing stable support for the driving components of the swirl blades 4.

[0040] As a further example, Figure 5 、 Figure 8 As shown, during the operation of the methanol separator, methanol may still remain in the waste liquid. Direct discharge will cause methanol loss and even pollute the environment. Therefore, a cover body 10 is added to form a secondary treatment chamber 11, in which the waste liquid is heated to evaporate methanol gas and recover it; specifically, a gas recovery port 104 is opened on the side wall of the cylinder 1, and the vertical cylindrical cover body 10 is covered on the outer wall of the cylinder 1 so that the inner wall of the cover body 10 and the outer wall of the cylinder 1 enclose the secondary treatment chamber 11, and the gas recovery port 104, the liquid outlet 102 and the feed port 103 are all connected to the secondary treatment chamber 11, and the gas recovery port 104 can recover the methanol gas in the secondary treatment chamber 11 into the cylinder 1. The waste liquid discharged from the liquid outlet 102 can enter the secondary treatment chamber 11; at the same time, a feed pipe 12 is added through the cover body 10 to supply material to the centrifugal chamber 3. The feed pipe 12 is a tubular structure, one end of which is connected to the feed port 103 to supply material to the centrifugal chamber 3, and the other end extends through the cover body 10 to the outside. The heating element (such as an electric heating tube, a steam coil) is arranged in the secondary treatment chamber 11 (can be attached to the outer wall of the cylinder 1 or hung in the chamber) to heat the waste liquid in the secondary treatment chamber 11 to evaporate the 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 the cover body 10, which is used to control the discharge of the waste liquid in the secondary treatment chamber 11.

[0041] The above structure creates a closed-loop methanol recovery system. Waste liquid discharged from liquid outlet 102 enters secondary treatment chamber 11, where a heating element heats the chamber, evaporating any remaining methanol in the waste liquid into gas. The gas then returns to cylinder 1 through gas recovery port 104, where it re-enters gas-liquid separation. (A guide surface can be formed near gas recovery port 104 on housing 10 to facilitate methanol gas recovery.) Once the methanol in the waste liquid in secondary treatment chamber 11 has been heated and evaporated, the remaining waste liquid can be periodically discharged through a control valve (waste liquid accumulates when closed and drains rapidly when opened). Therefore, gas recovery port 104 is positioned above liquid outlet 102, and liquid outlet 102 is positioned above the control valve to ensure proper functioning of these functions.

[0042] Working principle: First, the gas-liquid mixture is transported into the centrifugal chamber 3 through the feed pipe 12. At this time, the driving gear 7 drives the centrifugal cone 2 to rotate actively, and the swirl blades 4 rotate coaxially and synchronously with the centrifugal cone 2 (centrifugal state). The spiral or linear blades guide the gas-liquid mixture to form a stable swirl, and use centrifugal force to throw the methanol droplets to the inner wall of the centrifugal cone 2. The droplets slide along the wall and are discharged into the secondary treatment chamber 11 through the liquid outlet 102; the gas phase converges at the center of the centrifugal cone 2, and is led out to the gas outlet 101 through the exhaust port 201 and the pipeline, completing the initial gas-liquid separation.

[0043] 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 blades 4, the swirl blades 4 rotate in the opposite direction / differentially 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 and the subsequent separation efficiency. There is no need to stop or disassemble the machine during the entire process, maintaining production continuity.

[0044] Secondly, the methanol-containing waste liquid discharged from the liquid outlet 102 enters the secondary treatment chamber 11, and the heating element is started to heat and evaporate the waste liquid - the residual methanol is converted into gas, returned to the cylinder 1 through the gas recovery port 104, and recovered from the gas outlet 101; after the methanol is fully evaporated, the control valve at the bottom of the secondary treatment chamber 11 is intermittently opened to discharge the waste liquid.

[0045] 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gas-liquid separator for methanol production, characterized in that: include: A cylinder (1), wherein 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), both of which are rotatably disposed in the cylinder (1) and spaced apart along the circumference of the cylinder (1), the main axis of the centrifugal cone (2) and the main axis of the cylinder (1) being arranged at an angle, the inner wall of the centrifugal cone (2) and the inner wall of the cylinder (1) enclosing a centrifugal cavity (3), each of which is connected to the liquid outlet (102) and the feed inlet (103), and the diameter of the centrifugal cone (2) gradually increasing 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) close to the small-diameter end of the centrifugal cone (2), and each exhaust port (201) is connected to the air outlet (101) via an exhaust pipeline.

2. A gas-liquid separator for methanol production according to claim 1, characterized in that: The rotating shaft of the centrifugal cone (2) is arranged horizontally, and a plurality of swirl blades (4) for separating gas and liquid are arranged along the circumference of the inside of the centrifugal cone (2). An end plate is provided at the small-diameter end of the centrifugal cone (2), and the swirl 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 provided on the end plate and is located at the intersection of the extended ends of the plurality of swirl blades (4). The exhaust port (201) is used to allow the gas separated in the centrifugal cone (2) to enter the exhaust pipeline, and the feed port (103) faces one side of the exhaust port (201).

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

4. A gas-liquid separator for methanol production according to claim 3, characterized in that: The centrifugal cone (2) is provided with a ring gear (6) on the outer peripheral wall of the small diameter end, and further comprises: A driving gear (7) is rotatably arranged at the bottom of the cylinder (1) and is used to drive the centrifugal cone (2) to rotate. The rotating shaft of the driving gear (7) is arranged vertically, and the ring teeth (6) of the two centrifugal cones (2) are both engaged with the driving 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), and the swirl blade (4) is slidably connected in the annular connecting groove (202). A supporting ring (8) is provided on the inner wall of the cylinder (1), and an annular groove (801) is provided at one end of the supporting ring (8). A ring portion (9) is slidably connected in the annular groove (801). The ring portion (9) is integrally formed with the swirl blade (4) and is slidably connected to the large-diameter end of the centrifugal cone (2), so that the swirl blade (4) can rotate relative to the centrifugal cone (2) to clean the inner wall of the centrifugal cone (2); The swirl blade (4) has a centrifugal state and a cleaning state. When the swirl blade (4) is in the centrifugal state, the swirl blade (4) can rotate synchronously with the centrifugal cone (2) to centrifugally separate gas and liquid. When the swirl blades (4) are in a cleaning state, the swirl blades (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 portion (9) and the inner wall of the second support ring (8) together enclose the centrifugal chamber (3).

7. A gas-liquid separator for methanol production according to claim 1, characterized in that: The side wall of the cylinder (1) is provided with a gas recovery port (104), and further comprises: a cover body (10), the cover body (10) being arranged on the outer peripheral wall of the cylinder (1) and forming a secondary processing chamber (11) between the cover body (10) and the cover body (10), the gas recovery port (104), the liquid outlet (102) and the feed port (103) all being connected to the secondary processing chamber (11), and the gas recovery port (104) being used for reflux of methanol gas in the secondary processing chamber (11) into the cylinder (1); a feed pipe (12), the feed pipe (12) being connected to the feed port (103) and being used for feeding material into the centrifugal chamber (3), and the feed pipe (12) penetrating the cover body (10); A heating element is provided in the secondary treatment chamber (11) and is used to heat the waste liquid flowing from the liquid outlet (102) into the secondary treatment chamber (11) to evaporate methanol gas in the waste liquid.

8. A gas-liquid separator for methanol production according to claim 7, characterized in that: A control valve is provided at the bottom of the cover body (10), and the control valve is used to control the discharge of waste liquid in the secondary treatment chamber (11).

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

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