A kind of 1,1,7-trichloro-1-heptene-3-ketone production with enamel reaction kettle

Abstract

The present disclosure relates to the technical field of enamel reaction kettles, and one embodiment of the present disclosure provides an enamel reaction kettle for producing 1,1,7-trichloro-1-heptene-3-ketone, which comprises a support frame and a kettle body, the kettle body is fixed on the support frame, a kettle cover is arranged on the kettle body, a connecting assembly is arranged on the support frame and the kettle cover, a heating and stirring assembly is arranged on the kettle body and the kettle cover, the heating and stirring assembly comprises a main shaft, the main shaft is rotationally connected in the kettle cover, the main shaft rotates through a motor, a plurality of stirring frames are arranged on the main shaft, a convex layer is arranged on the inner wall of the kettle body, a first heating pipe is arranged in the convex layer, a partition cavity is formed in the inner wall of the kettle body, the partition cavity is located outside the first heating pipe, a plurality of stand columns are arranged on the inner bottom of the kettle body, an inner cover is arranged on the upper end of the stand column, and a plurality of second heating pipes are arranged in the inner cover. Through the above technical solution, the technical problems of low heating efficiency and poor mixing effect in the prior art are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of enamel-lined reactors, specifically to an enamel-lined reactor for the production of 1,1,7-trichloro-1-hepten-3-one. Background Technology

[0002] In the fine chemical production of 1,1,7-trichloro-1-hepten-3-one, enamel-lined reactors are crucial equipment due to their excellent corrosion resistance and high-temperature resistance. However, existing defects in enamel-lined reactors severely restrict production quality and efficiency.

[0003] In the heating stage, traditional reactors often employ jacket heating or electric heating rods. Jacket heating relies on heat convection, which easily creates temperature gradients, leading to localized overheating of the materials and causing side reactions that affect product purity. Electric heating rods have a limited heating area, slow heat diffusion, prolonging reaction time and consuming high energy. Regarding stirring, conventional paddle and anchor stirrers generate insufficient fluid shear force, making it difficult to fully mix high-viscosity materials, resulting in insufficient contact between reactants and hindering the reaction process.

[0004] Furthermore, the traditional monolithic design of reaction vessels makes cleaning of internal dead corners difficult. Even with high-pressure water jet rinsing, residual materials easily adhere, not only contaminating subsequent reactions but also corroding the enamel layer and shortening the equipment's lifespan. Therefore, there is an urgent need to develop an enamel-lined reaction vessel that improves heating and stirring effects and is easy to disassemble and clean internally to meet the demand for efficient production of 1,1,7-trichloro-1-hepten-3-one. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide an enamel-lined reactor for the production of 1,1,7-trichloro-1-hepten-3-one, which solves the technical problems of low heating efficiency and poor mixing effect in the prior art.

[0006] According to one aspect, at least one embodiment of this disclosure provides an enamel-lined reactor for the production of 1,1,7-trichloro-1-hepten-3-one, comprising:

[0007] A support frame and a vessel body, wherein the vessel body is fixed to the support frame;

[0008] A vessel lid and a connecting assembly, wherein the vessel lid is disposed on the vessel body, and the connecting assembly is disposed on the support frame and the vessel lid;

[0009] A heating and stirring assembly is disposed on the vessel body and the vessel lid;

[0010] The heating and stirring assembly includes a main shaft, which is rotatably connected inside the vessel lid. The main shaft is controlled to rotate by a motor. Several stirring racks are provided on the main shaft. A protrusion is provided on the inner wall of the vessel, and a first heating tube is provided in the protrusion.

[0011] As a further technical solution, a partition cavity is provided in the inner wall of the vessel, the partition cavity is located outside the first heating tube, a number of columns are provided at the bottom of the vessel, an inner cover is provided at the upper end of the columns, and a number of second heating tubes are provided in the inner cover.

[0012] As a further technical solution, the connecting assembly includes a connecting frame, which is fixed on the vessel lid. The connecting frame is connected to the top of the support frame via a vertical linear drive, and a pair of rectangular grooves are formed on the surface of the support frame.

[0013] As a further technical solution, cross frames are movably connected to both sides of the support frame, and a tightening frame is provided on the outer end face of the cross frame. The tightening frame is fitted at the connection between the vessel body and the vessel cover, and the tightening frames are fixedly connected by bolts.

[0014] As a further technical solution, a stud is provided on the side end face of the cross frame. The stud is inserted into the side end face of the support frame. A nut is screwed to one end of the stud. The nut fits into one side of the rectangular groove. The other end of the cross frame is fixedly connected to the inner side of the rectangular groove by bolts.

[0015] As a further technical solution, the outer surface of the connection between the vessel body and the vessel lid and the inner surface of the clamping frame are both inclined transition structural surfaces.

[0016] As a further technical solution, the inner cover is in the form of a circular ring structure, and there is a certain height gap between the bottom of the inner cover and the bottom surface of the vessel body.

[0017] As a further technical solution, a pair of stabilizing rods are provided at the bottom of the connecting frame, and the stabilizing rods are movably connected to the top of the support frame.

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

[0019] In this disclosure, the component forms a three-dimensional heating network from the sidewall to the bottom by the synergistic action of the first heating tube embedded in the convex layer and the second heating tube in the inner casing. This significantly improves heat conduction efficiency and avoids the temperature gradient and local overheating problems of traditional jacket heating. The stirring rack generates high-intensity shear force under the drive of the main shaft, effectively breaking up material agglomeration and promoting uniform mixing of high-viscosity fluids. The heat insulation design of the cavity reduces heat loss and buffers the temperature difference between the inside and outside, significantly reducing the risk of enamel layer cracking due to thermal stress. The annular structure and bottom gap design of the inner casing prevent the formation of a dead zone in the center of the bottom of the vessel, ensuring that heating and stirring cover the entire area. Ultimately, this achieves simultaneous improvement in reaction temperature uniformity and reaction rate, ensuring the synthesis purity and yield of 1,1,7-trichloro-1-hepten-3-one. 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. Support frame; 2. Vessel body; 3. Vessel lid; 4. Heating and stirring assembly; 4-1. Main shaft; 4-2. Stirring frame; 4-3. Raised layer; 4-4. First heating tube; 4-5. Chamber; 4-6. Column; 4-7. Inner cover; 4-8. Second heating tube; 5. Connecting assembly; 5-1. Connecting frame; 5-2. Rectangular groove; 5-3. Horizontal frame; 5-4. Tightening frame; 5-5. Stud; 5-6. Nut; 6. Stabilizing rod. 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, it illustrates an enamel-lined reactor for the production of 1,1,7-trichloro-1-hepten-3-one according to an embodiment of this disclosure, comprising:

[0033] The support frame 1 and the vessel body 2 are fixed on the support frame 1;

[0034] The vessel lid 3 and the connecting component 5 are provided on the vessel body 2, and the connecting component 5 is provided on the support frame 1 and the vessel lid 3.

[0035] Heating and stirring assembly 4 is disposed on the vessel body 2 and the vessel cover 3;

[0036] The heating and stirring assembly 4 includes a main shaft 4-1, which is rotatably connected inside the vessel cover 3. The main shaft 4-1 is rotated by a motor. Several stirring racks 4-2 are provided on the main shaft 4-1. A protrusion 4-3 is provided on the inner wall of the vessel body 2. A first heating tube 4-4 is provided in the protrusion 4-3. A partition 4-5 is opened in the inner wall of the vessel body 2. The partition 4-5 is located outside the first heating tube 4-4. Several columns 4-6 are provided at the bottom of the vessel body 2. An inner cover 4-7 is provided at the upper end of the columns 4-6. Several second heating tubes 4-8 are provided in the inner cover 4-7.

[0037] In some examples, a heating and stirring assembly 4 is designed to achieve a comprehensive effect of uniform heating of materials, efficient mixing, and prevention of localized overheating of the vessel wall. This assembly includes a main shaft 4-1 driven by a motor, on which multiple stirring racks 4-2 can powerfully mix the materials inside the vessel. A first heating tube 4-4 is embedded in the raised layer 4-3 of the inner wall of the vessel body 2, primarily heating the materials on the side walls and upper middle part of the vessel body 2. A cavity 4-5 located outside the first heating tube 4-4 can be filled with insulation material or form an air insulation layer, effectively reducing heat loss to the outer wall of the vessel body 2 and lowering the risk of damage to the enamel layer of the vessel wall due to excessive temperature differences between the inside and outside. A column 4-65-7 at the bottom of the vessel supports the inner cover 4-7, and a second heating tube 4-8 installed inside it mainly provides concentrated heating to the bottom area of ​​the vessel body 2, preventing high-boiling-point or easily sedimenting materials from accumulating at the bottom and receiving insufficient heating. The structural design of the raised layer 4-3 enhances the heat transfer area of ​​the inner wall. The first heating tube 4-4 and the second heating tube 4-8 work together to form a three-dimensional heating network from the side wall to the bottom. Combined with the continuous mixing action of the stirring rack 4-2, this ensures that the material is heated evenly during the reaction process, promoting the full progress of the synthesis reaction of 1,1,7-trichloro-1-hepten-3-one.

[0038] like Figures 1-4As shown in the figure, the connecting component 5 in this embodiment includes a connecting frame 5-1, which is fixed on the vessel cover 3. The connecting frame 5-1 is connected to the top of the support frame 1 by a vertical linear drive. A pair of rectangular slots 5-2 are opened on the surface of the support frame 1. A cross frame 5-3 is movably fitted to both sides of the support frame 1. A tightening frame 5-4 is provided on the outer end face of the cross frame 5-3. The tightening frame 5-4 is fitted at the connection between the vessel body 2 and the vessel cover 3. The tightening frames 5-4 are fixedly connected to each other by bolts. A stud 5-5 is provided on the side end face of the cross frame 5-3. The stud 5-5 is inserted into the side end face of the support frame 1. A nut 5-6 is screwed to one end of the stud 5-5. The nut 5-6 fits against one side of the rectangular slot 5-2. The other end of the cross frame 5-3 is fixedly connected to the inner side of the rectangular slot 5-2 by bolts.

[0039] In some examples, a connecting assembly 5 is designed to achieve a quick, secure sealing connection and convenient opening and closing between the vessel body 2 and the vessel lid 3. This assembly includes a connecting bracket 5-1 fixed to the vessel lid 3, which is connected to the top of the support frame 1 via a vertical linear drive (such as a pneumatic or hydraulic cylinder) to control the overall lifting and lowering of the vessel lid 3. Laterally sliding crossbars 5-3 are movably fitted within the rectangular grooves 5-2 on both sides of the support frame 1. The clamping brackets 5-4 installed at the outer ends of the crossbars 5-3 are designed to cover the flange connection between the vessel body 2 and the vessel lid 3. When sealing is required, the vertical linear drive first lowers the vessel lid 3 to initially align and fit it with the vessel body 2. Subsequently, the crossbars 5-3 on both sides are pushed along the rectangular grooves 5-2 towards the center of the vessel body 2, causing the two clamping brackets 5-4 to close and cover the flange connection, and are then fastened together with bolts to form the first locking structure. Tighten the nut 5-6 on the stud 5-5 at the side end of the crossbeam 5-3. The nut 5-6 provides a reaction force on the inner wall of the rectangular groove 5-2, pulling the crossbeam 5-3 towards the center of the vessel body 2, achieving the second locking. Finally, use a bolt to pass through the other end of the crossbeam 5-3 and fix it to the inner side of the rectangular groove 5-2, forming the third locking, ensuring an absolutely firm and reliable connection that meets the reaction pressure requirements. When it is necessary to open the lid, loosen the bolts, nuts 5-6, and bolts in reverse order, slide the crossbeam 5-3 outward, release the constraint of the clamping frame 5-4, and then start the vertical linear drive to lift the vessel lid 3. The operation is simple and efficient. This structure not only ensures the strength and reliability of the seal but also greatly facilitates the loading, unloading, cleaning, and maintenance of the reactor.

[0040] For example, such as Figure 3 As shown, the outer surface of the connection between the vessel body 2 and the vessel cover 3, as well as the inner surface of the clamping frame 5-4, are all inclined transition structural surfaces.

[0041] In some examples, the inclined transition surface design allows the inclined surface to generate a self-centering effect when the clamping bracket 5-4 is fitted and locked at the connecting flange of the vessel body 2 and the vessel cover 3. This guides the clamping bracket 5-4 to more accurately cover the vessel, while increasing the contact area and making the locking force distribution more uniform. This effectively improves the sealing performance of the flange connection and reduces the risk of leakage.

[0042] For example, such as Figure 3 As shown, the inner cover 4-7 has an overall ring-shaped structure, and there is a certain height gap between the bottom of the inner cover 4-7 and the inner bottom surface of the vessel body 2.

[0043] In some examples, the annular structure of the inner casing 4-7 allows it to effectively heat the bottom area using the second heating element 4-8 without completely obstructing the flow of material at the bottom of the vessel. The height gap between its bottom and the inner bottom surface of the vessel body 2 provides space for material flow, preventing the formation of dead zones and accumulation of material in the central bottom area. It also facilitates the stirring of the material at the bottom by the stirring rack 4-2 and the convection transfer of heat, ensuring uniform heating throughout the entire bottom area.

[0044] For example, such as Figure 2 As shown, a pair of stabilizing rods 6 are provided at the bottom of the connecting frame 5-1, and the stabilizing rods 6 are movably connected to the top of the support frame 1.

[0045] In some examples, the stabilizing rod 6 is movably inserted into the corresponding sleeve or hole at the top of the support frame 1. Its main function is to provide additional lateral support and guidance for the connecting frame 5-1 and the vessel lid 3 during the vertical linear drive lifting and lowering process and during the operation of the reactor. This effectively prevents the vessel lid 3 from shaking or shifting during lifting and lowering, ensuring its precise alignment with the reactor body 2. Simultaneously, during the reaction process, especially when stirring generates significant vibration, the stabilizing rod 6 significantly enhances the stability of the vessel lid 3, reducing the impact of vibration on the connecting assembly 5 and sealing performance, and improving the smoothness and safety of equipment operation. Its movable connection design does not affect the normal lifting and lowering movement of the vessel lid 3.

[0046] In actual use: First, activate the vertical linear drive in the connecting assembly 5 to control the smooth rise of the vessel lid 3, fully exposing the vessel body 2. Then, add the reaction raw material 1,1,7-trichloro-1-hepten-3-one into the vessel. After closing the vessel lid 3, the operator pushes the horizontal frames 5-3 on both sides of the support frame 1 to slide towards the center, causing the clamping frame 5-4 to cover the flange connection between the vessel body 2 and the vessel lid 3. The clamping frame 5-4 is then tightened with bolts to form the first seal. Next, tighten the nuts 5-6 on the studs 5-5 on the side of the horizontal frame 5-3. The reaction force between the nuts 5-6 and the inner wall of the rectangular groove 5-2 is used to tighten the horizontal frame 5-3 to achieve the second seal. Finally, bolts are used to fix the horizontal frame 5-3 to the inner side of the rectangular groove 5-2. After completing the third locking step to ensure the pressure-bearing and sealing performance of the reactor, the heating and stirring assembly 4 is started. The motor drives the main shaft 4-1 to rotate the multi-layer stirring rack 4-2, which powerfully shears the material and promotes convection. At the same time, the first heating tube 4-4 heats the material laterally and evenly through the protrusion 4-3 on the reactor wall, while the second heating tube 4-8 concentrates the heating of the bottom area inside the inner cover 4-7. The heat insulation layer of the partition 4-5 reduces heat loss and protects the enamel layer. During the reaction, heating and stirring work together to ensure uniform temperature and complete reaction. After the reaction is completed, the connecting assembly 5 is unlocked in reverse order, the reactor lid 3 is lifted, and the inner wall of the reactor, the stirring rack 4-2, and the bottom gap of the inner cover 4-7 are thoroughly cleaned to prevent residues from corroding the equipment.

[0047] 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 1,1,7-trichloro-1-heptene-3-one production porcelain reaction vessel, characterized by, include: A support frame (1) and a vessel body (2), wherein the vessel body (2) is fixed on the support frame (1); The vessel lid (3) and the connecting assembly (5) are provided on the vessel body (2), and the connecting assembly (5) is provided on the support frame (1) and the vessel lid (3). A heating and stirring assembly (4) is provided on the vessel body (2) and the vessel cover (3); The heating and stirring assembly (4) includes a main shaft (4-1), which is rotatably connected inside the vessel cover (3). The main shaft (4-1) is rotated by a motor. Several stirring racks (4-2) are provided on the main shaft (4-1). A protrusion (4-3) is provided on the inner wall of the vessel body (2), and a first heating tube (4-4) is provided in the protrusion (4-3).

2. The enamel reaction kettle for producing 1,1,7-trichloro-1-heptene-3-one according to claim 1, characterized in that, The inner wall of the vessel body (2) is provided with a partition cavity (4-5), the partition cavity (4-5) is located outside the first heating tube (4-4), a number of columns (4-6) are provided at the bottom of the vessel body (2), an inner cover (4-7) is provided at the upper end of the column (4-6), and a number of second heating tubes (4-8) are provided in the inner cover (4-7).

3. The enamel reaction kettle for producing 1,1,7-trichloro-1-heptene-3-ketone according to claim 1, characterized in that, The connecting assembly (5) includes a connecting frame (5-1), which is fixed on the lid (3). The connecting frame (5-1) is connected to the top of the support frame (1) by a vertical linear drive. A pair of rectangular grooves (5-2) are provided on the surface of the support frame (1).

4. The enamel reaction vessel for producing 1,1,7-trichloro-1-heptene-3-one according to claim 3, characterized by The support frame (1) is movably fitted with a cross frame (5-3) on both sides. A tightening frame (5-4) is provided on the outer end face of the cross frame (5-3). The tightening frame (5-4) is fitted at the connection between the vessel body (2) and the vessel cover (3). The tightening frames (5-4) are fixedly connected to each other by bolts.

5. The enamel-lined reactor for the production of 1,1,7-trichloro-1-hepten-3-one according to claim 4, characterized in that, A stud (5-5) is provided on the side end face of the cross frame (5-3). The stud (5-5) is inserted into the side end face of the support frame (1). A nut (5-6) is screwed to one end of the stud (5-5). The nut (5-6) fits against one side of the rectangular groove (5-2). The other end of the cross frame (5-3) is fixedly connected to the inner side of the rectangular groove (5-2) by bolts.

6. The enamel reaction vessel for producing 1,1,7-trichloro-1-heptene-3-one according to claim 4, characterized by The outer surface of the connection between the vessel body (2) and the vessel cover (3) and the inner surface of the clamping frame (5-4) are all inclined transition structural surfaces.

7. The enamel reaction vessel for producing 1,1,7-trichloro-1-heptene-3-one according to claim 2, characterized by The inner cover (4-7) has an overall ring-shaped structure, and there is a certain height gap between the bottom of the inner cover (4-7) and the inner bottom surface of the vessel body (2).

8. The enamel reaction vessel for producing 1,1,7-trichloro-1-heptene-3-one according to claim 3, characterized by The bottom of the connecting frame (5-1) is provided with a pair of stabilizing rods (6), which are movably connected to the top of the support frame (1).

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