A distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one

Abstract

This disclosure relates to the technical field of distillation columns. One embodiment of this disclosure provides a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one, comprising: a lower column body, an upper column body, and a waste discharge pipe. The upper column body is located at the top of the lower column body, the waste discharge pipe is located at the bottom of the lower column body, and the top pipe is located at the top of the upper column body. A condenser is installed at one end of the top pipe. Connecting frames are fixed to opposite ends of the outer wall of the upper column body. An outwardly protruding layer is provided around the outer wall of the lower column body. A pair of vertical hydraulic cylinders are provided at the bottom of the outwardly protruding layer, and the output ends of the vertical hydraulic cylinders are connected to the connecting frames. Several supporting legs are provided around the bottom surface of the outwardly protruding layer. This technical solution solves the problem in the prior art where traditional distillation columns typically use an integral closed structure, making it difficult for maintenance personnel to quickly and conveniently open the column body for internal inspection and maintenance when problems such as packing damage, plate scaling, or internal pipe blockage occur.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of distillation columns, and more specifically, to a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one. Background Technology

[0002] In the chemical production of 1,1,7-trichloro-1-hepten-3-one, the distillation column, as the core equipment for separating and purifying the mixture, directly affects product quality and production efficiency. However, most distillation columns currently on the market for the preparation of 1,1,7-trichloro-1-hepten-3-one suffer from structural design flaws, leading to numerous inconveniences in equipment maintenance. Traditional distillation columns typically employ an integral, closed structure. When problems arise such as packing damage, plate scaling, or internal pipeline blockage, maintenance personnel find it difficult to quickly and conveniently open the column for internal inspection and maintenance. This inability to open for timely maintenance not only exacerbates equipment malfunctions, affecting the production schedule and product quality of 1,1,7-trichloro-1-hepten-3-one, but also requires significant time and manpower for disassembly each time, increasing maintenance costs and equipment downtime, thus reducing the company's economic efficiency and production flexibility.

[0003] Therefore, there is an urgent need for a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one that can overcome the drawback of the inconvenience of opening and maintaining the internal structure, so as to improve the maintainability and production efficiency of the equipment. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one, which solves the technical problem that the column body of the traditional distillation column in the prior art is usually an integral closed structure, and when problems such as packing damage, plate scaling, and internal pipeline blockage occur in the column, it is difficult for maintenance personnel to quickly and conveniently open the column body to inspect and maintain the interior.

[0005] According to one aspect, at least one embodiment of this disclosure provides a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one, comprising:

[0006] The lower tower body, the upper tower body, and the waste discharge pipe are provided, wherein the upper tower body is located at the top of the lower tower body and the waste discharge pipe is located at the bottom of the lower tower body.

[0007] The top pipe and the condenser are provided, wherein the top pipe is located at the top of the upper tower body and the condenser is installed at one end of the top pipe;

[0008] The split lifting assembly is disposed between the lower tower body and the upper tower body;

[0009] A splicing hood and a distillation treatment assembly, wherein the splicing hood is fitted between the upper column and the lower column, and the distillation treatment assembly is disposed within the lower column and the splicing hood;

[0010] The split lifting assembly includes a pair of connecting frames, which are fixed to opposite ends of the outer wall of the upper tower body. The outer wall of the lower tower body is provided with an outward protrusion layer around its perimeter. A pair of vertical hydraulic cylinders are provided at the bottom of the outward protrusion layer. The output end of the vertical hydraulic cylinders is connected to the connecting frames. Several support legs are provided around the bottom surface of the outward protrusion layer.

[0011] As a further technical solution, the distillation processing assembly includes an inner ring frame, which is fixed inside the lower column body, and a plurality of heating resistance wires are arranged inside the inner ring frame.

[0012] As a further technical solution, the inner wall of the splicing cover is provided with a layered tower plate, and the outer wall of the layered tower plate is provided with protrusions in a stepped manner. Several side surfaces of the layered tower plate are provided with dispersion openings.

[0013] As a further technical solution, several surfaces of the layered tower plate are provided with long ventilation holes, and several gas collecting hoods are provided on the surface of the layered tower plate. Dispersion holes are provided on both sides of the gas collecting hoods.

[0014] As a further technical solution, the surface of the boss has an inclined structure, and the dispersing port is located on one side of the boss.

[0015] As a further technical solution, both the layered tower plate and the outer wall of the boss are sealed and fitted to the inner wall of the upper tower body.

[0016] As a further technical solution, the cross-section of the connection between the splicing cover and the upper tower body and the lower tower body is U-shaped.

[0017] As a further technical solution, the cross-section of the gas collecting hood is Y-shaped, and the dispersion holes are opened on the inclined surfaces on both sides of the bottom of the gas collecting hood.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] In this disclosure, the split lifting assembly, through the extension and retraction of a vertical hydraulic cylinder, can easily raise and lower the upper column, solving the problem of the difficulty in opening and maintaining the traditional monolithic closed structure of distillation columns. When problems such as packing damage or scaling on the trays occur inside the column, no complicated disassembly process is required; simply activating the vertical hydraulic cylinder allows for quick opening of the column, facilitating internal inspection and maintenance by maintenance personnel. This reduces maintenance time and labor costs, and improves the maintainability and production efficiency of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0021] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0022] Figure 2 This is an isometric drawing of the present disclosure;

[0023] Figure 3 This is an isometric sectional view of the present disclosure;

[0024] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;

[0025] In the diagram: 1. Lower tower body; 2. Upper tower body; 3. Waste discharge pipe; 4. Top pipe; 5. Condenser; 6. Splicing hood; 7. Split lifting assembly; 7-1. Connecting frame; 7-2. Outer protrusion layer; 7-3. Vertical hydraulic cylinder; 7-4. Support leg; 8. Distillation processing assembly; 8-1. Inner ring frame; 8-2. Heating resistance wire; 8-3. Layered tower plate; 8-4. Boss; 8-5. Dispersion port; 8-6. Vent hole; 8-7. Gas collection hood; 8-8. Dispersion hole. Detailed Implementation

[0026] The present disclosure 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 present disclosure and are not intended to limit the scope of the disclosure.

[0027] 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."

[0028] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" 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 disclosure based on the specific circumstances.

[0029] In this disclosure, unless otherwise expressly 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.

[0030] 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 this disclosure.

[0031] 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.

[0032] like Figures 1-4 As shown, a distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one is illustrated in one embodiment of this disclosure, comprising:

[0033] The lower tower body 1, the upper tower body 2, and the waste discharge pipe 3 are provided. The upper tower body 2 is located at the top of the lower tower body 1, and the waste discharge pipe 3 is located at the bottom of the lower tower body 1.

[0034] Top pipe 4 and condenser 5, the top pipe 4 is located at the top of the upper tower body 2, and the condenser 5 is installed at one end of the top pipe 4;

[0035] Split lifting assembly 7, wherein the split lifting assembly 7 is disposed between the lower tower body 1 and the upper tower body 2;

[0036] The splicing cover 6 and the distillation processing component 8 are provided. The splicing cover 6 is fitted between the upper column body 2 and the lower column body 1, and the distillation processing component 8 is disposed inside the lower column body 1 and the splicing cover 6.

[0037] The split lifting assembly 7 includes a pair of connecting frames 7-1, which are fixed to opposite ends of the outer wall of the upper tower body 2. The outer wall of the lower tower body 1 is provided with an outward protrusion layer 7-2. A pair of vertical hydraulic cylinders 7-3 are provided at the bottom of the outward protrusion layer 7-2. The output end of the vertical hydraulic cylinder 7-3 is connected to the connecting frame 7-1. Several support legs 7-4 are provided around the bottom surface of the outward protrusion layer 7-2.

[0038] In some examples, to achieve precise lifting and stable support for the upper tower body 2, a split lifting assembly 7 is designed. This assembly includes a pair of connecting frames 7-1 vertically fixed at opposite ends of the outer wall of the upper tower body 2, with their bottoms connected to the output ends of vertical hydraulic cylinders 7-3. The outer protruding layer 7-2 of the outer wall of the lower tower body 1 has an annular structure, and the vertical hydraulic cylinders 7-3, symmetrically arranged at the bottom, are fixed to the outer protruding layer 7-2 via flanges. The cylinder piston rod extends upward and is rigidly connected to the connecting frames 7-1. When compressed air is introduced into the vertical hydraulic cylinder 7-3, the piston rod pushes the connecting frames 7-1 upward, causing the upper tower body 2 to slowly rise vertically, thus enabling the split opening of the upper and lower tower bodies 1 for convenient internal inspection and maintenance operations.

[0039] The support legs 7-4, which are evenly distributed around the bottom surface of the outer convex layer 7-2, are designed to control the lifting stroke of the upper tower body 2 by combining the power drive of the vertical hydraulic cylinder 7-3 with the mechanical support of the support legs 7-4, and to maintain stability in the split state, thus preventing damage to the sealing surface caused by shaking.

[0040] like Figures 1-4 As shown in the figure, the distillation processing component 8 in this embodiment includes an inner ring frame 8-1, which is fixed inside the lower column body 1. A plurality of heating resistance wires 8-2 are arranged inside the inner ring frame 8-1. A layered column plate 8-3 is arranged on the inner wall of the splicing cover 6. The outer wall of the layered column plate 8-3 is provided with bosses 8-4 in a stepped manner. A plurality of dispersion ports 8-5 are opened on a plurality of side surfaces of the layered column plate 8-3. A plurality of vent holes 8-6 are opened on a plurality of surface of the layered column plate 8-3. A plurality of gas collecting hoods 8-7 are arranged on the surface of the layered column plate 8-3. Dispersion holes 8-8 are opened on both sides of the gas collecting hoods 8-7.

[0041] In some examples, to achieve efficient distillation, a distillation processing component 8 is designed. This component includes an inner ring frame 8-1, which is a circular metal frame fixed to the inner wall of the lower column 1. Heating resistance wires 8-2 (such as nickel-chromium alloy wires) are evenly arranged in the circumferential direction and insulated from the inner ring frame 8-1 by ceramic insulators. When energized, they uniformly heat the material in the lower column 1, causing the low-boiling-point components to vaporize. The layered trays 8-3 on the inner wall of the splicing cover 6 are stacked in a stepped manner. The outer wall protrusions 8-4 of each tray engage with the grooves on the inner wall of the splicing cover 6 to form positioning supports. The height difference between the trays causes the liquid to flow in a wave-like manner along the tray surface under the action of gravity, prolonging the gas-liquid contact time. After the upper column 2 is raised and opened, the layered trays 8-3 and the splicing cover 6 can be removed together.

[0042] The side surfaces of each tray are alternately arranged with dispersion ports 8-5 and elongated venting holes 8-6: the dispersion ports 8-5 disperse the liquid flowing down from the upper layer into fine streams, increasing the contact area with the rising vapor; the elongated venting holes 8-6 provide an upward channel for the vapor, and the baffles inside the holes prevent the liquid from falling directly. The gas collecting hood 8-7 on the tray surface is an inverted funnel shape, with the dispersion ports 8-8 on both sides corresponding to the elongated venting holes 8-6. After the vapor enters the gas collecting hood 8-7 through the dispersion ports 8-8, it is guided to the area above the dispersion ports 8-5 on the upper tray, forming a cross-flow mass transfer of rising vapor and descending liquid. For example, after the 1,1,7-trichloro-1-hepten-3-one mixture is heated and vaporized in the lower column 1, the vapor rises through the elongated venting holes 8-6 and comes into countercurrent contact with the liquid on the layered tray 8-3. The high-boiling-point component condenses and refluxes, while the low-boiling-point component continues to rise to the condenser 5. Component separation is achieved through this multi-stage mass transfer process.

[0043] For example, such as Figure 3 As shown, the surface of the boss 8-4 has an inclined structure, and the dispersing port 8-5 is on one side of the boss 8-4.

[0044] In some examples, the surface of the boss 8-4 is inclined, and the dispersion port 8-5 is located on one side of the boss 8-4. This design optimizes the mass transfer path of the liquid through gravity guidance. The inclination angle of the surface of the boss 8-4 is usually 10°~15°, tilting from the center of the tray towards the edge, so that the liquid flowing down from the upper layer forms a thin film flow on the surface of the boss 8-4. When the liquid reaches the dispersion port 8-5, it is dispersed into fine streams or droplets due to the acceleration effect of the inclined surface, and evenly sprinkled above the venting holes 8-6 of the lower tray.

[0045] For example, such as Figure 3 As shown, the outer walls of the layered tower plate 8-3 and the boss 8-4 are both sealed and fitted to the inner wall of the upper tower body 2.

[0046] In some examples, the outer walls of the layered tray 8-3 and the boss 8-4 are sealed to the inner wall of the upper tower body 2, preventing steam short-circuit leakage through a rigid sealing structure. The boss 8-4 on the outer wall of the layered tray 8-3 and the annular groove on the inner wall of the upper tower body 2 are fitted with a tenon and mortise structure. The outer side of the boss 8-4 is wrapped with a fluororubber sealing ring. When the upper and lower tower bodies 1 are spliced ​​by the split lifting assembly 7, the pressure applied by the vertical cylinder compresses the sealing ring, forming a tight radial seal. The inclined surface of the boss 8-4 is in contact with the conical surface of the inner wall of the upper tower body 2, further blocking the path of steam rising from the gap between the tray and the tower wall.

[0047] For example, such as Figure 3 As shown, the cross-section of the splicing cover 6 at the connection with the upper tower body 2 and the lower tower body 1 is U-shaped.

[0048] In some examples, the cross-section of the splicing cover 6 at the connection with the upper tower body 2 and the lower tower body 1 has a U-shaped structure, forming a composite connection of elastic sealing and mechanical support. The groove of the U-shape is filled with graphite packing or metal spiral wound gaskets. When the upper and lower tower bodies 1 are pressed together by the vertical cylinder, the opening of the U-shaped groove is compressed, and the gasket deforms to fill the gap, achieving axial sealing. The two side walls of the U-shape are respectively fitted with the flange faces of the upper tower body 2 and the lower tower body 1, providing radial support and preventing cracks from forming at the splice due to thermal expansion and contraction.

[0049] For example, such as Figure 4 As shown, the cross-section of the gas collecting hood 8-7 is Y-shaped, and the dispersion holes 8-8 are opened on the inclined surfaces on both sides of the bottom of the gas collecting hood 8-7.

[0050] In some examples, the gas collecting hood 8-7 has a Y-shaped cross-section, with dispersion holes 8-8 located on the inclined surfaces on both sides of the bottom. This design enhances the uniform distribution of steam through flow channel diversion. The top opening of the Y-shape is aligned with the venting elongated hole 8-6. After the steam rises and enters the gas collecting hood 8-7, it is diverted along the two branches of the Y-shape to the dispersion holes 8-8 on both sides of the bottom. The inclined surfaces of the dispersion holes 8-8 cause the steam to be ejected at a 45° angle, covering the dispersion port 8-5 area of ​​the lower tray.

[0051] In practical use: The material to be distilled is fed into the lower column 1 from the top. The heating resistance wire 8-2 inside the inner ring rack 8-1 is activated to heat the material, which then vaporizes and rises. The steam rises through the vent holes 8-6 of the layered tray 8-3, coming into countercurrent contact with the liquid on the tray. The high-boiling-point components condense and reflux, while the low-boiling-point components continue to rise. After entering the gas collecting hood 8-7, the steam is sprayed obliquely through the dispersion holes 8-8, making full contact with the liquid on the upper tray. It then enters the condenser 5 through the top pipe 4 and condenses into a liquid state, completing the distillation. The waste liquid is discharged from the waste discharge pipe 3. When maintenance is required, the vertical hydraulic cylinder 7-3 is activated. Its output end pushes the connecting frame 7-1, causing the upper column 2 to rise slowly, exposing the splicing cover 6 and the internal layered trays 8-3. Maintenance personnel can then inspect and maintain the packing and trays inside the column. After maintenance is completed, the vertical hydraulic cylinder 7-3 retracts, and the upper column 2 descends to close with the lower column 1.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure 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 this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one, characterized in that, include: The lower tower body (1), the upper tower body (2), and the waste discharge pipe (3) are provided. The upper tower body (2) is located at the top of the lower tower body (1), and the waste discharge pipe (3) is located at the bottom of the lower tower body (1). The top pipe (4) and the condenser (5) are provided at the top of the upper tower body (2). The split lifting assembly (7) is disposed between the lower tower body (1) and the upper tower body (2); The splicing cover (6) and the distillation processing component (8) are provided, wherein the splicing cover (6) is fitted between the upper column body (2) and the lower column body (1), and the distillation processing component (8) is disposed inside the lower column body (1) and the splicing cover (6); The split lifting assembly (7) includes a pair of connecting frames (7-1), which are fixed at opposite ends of the outer wall of the upper tower body (2). The outer wall of the lower tower body (1) is provided with an outward protrusion layer (7-2). A pair of vertical hydraulic cylinders (7-3) are provided at the bottom of the outward protrusion layer (7-2). The output end of the vertical hydraulic cylinder (7-3) is connected to the connecting frame (7-1). A number of support legs (7-4) are provided around the bottom surface of the outward protrusion layer (7-2).

2. The distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one according to claim 1, characterized in that, The distillation processing assembly (8) includes an inner ring frame (8-1), which is fixed inside the lower column body (1). A plurality of heating resistance wires (8-2) are provided inside the inner ring frame (8-1).

3. The distillation column for preparing 1,1,7-trichloro-1-hepten-3-one according to claim 2, characterized in that, The inner wall of the splicing cover (6) is provided with a layered tower plate (8-3), and the outer wall of the layered tower plate (8-3) is provided with bosses (8-4) in a stepped manner. Several side surfaces of the layered tower plate (8-3) are provided with dispersion openings (8-5).

4. The distillation column for preparing 1,1,7-trichloro-1-hepten-3-one according to claim 3, characterized in that, The layered tower plate (8-3) has several elongated ventilation holes (8-6) on several surfaces, and several gas collecting hoods (8-7) are provided on the surface of the layered tower plate (8-3). Dispersion holes (8-8) are provided on both sides of the gas collecting hoods (8-7).

5. The distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one according to claim 3, characterized in that, The surface of the boss (8-4) has an inclined structure, and the dispersing port (8-5) is on the same side as the boss (8-4).

6. The distillation column for preparing 1,1,7-trichloro-1-hepten-3-one according to claim 3, characterized in that, The outer walls of the layered tower plate (8-3) and the boss (8-4) are both sealed and fitted to the inner wall of the upper tower body (2).

7. A distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one according to claim 1, characterized in that, The cross-section of the splicing cover (6) at the connection with the upper tower body (2) and the lower tower body (1) is U-shaped.

8. A distillation column for the preparation of 1,1,7-trichloro-1-hepten-3-one according to claim 4, characterized in that, The gas collecting hood (8-7) has a Y-shaped cross-section, and the dispersion holes (8-8) are opened on the inclined surfaces on both sides of the bottom of the gas collecting hood (8-7).

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