Efficient vortex stirring kettle for carbonyl synthesis reaction

Abstract

The utility model relates to the field of chemical production equipment, in particular to an efficient vortex stirring kettle for carbonyl synthesis reaction. Comprising a kettle body, a power mechanism, a stirring mechanism and a control mechanism, the stirring mechanism comprises a main shaft, a vortex-shaped impeller and a flow guide cover; the main shaft is rotationally arranged along the axis of the kettle body; the vortex-shaped impeller is of a big-end-down structure, and the vortex-shaped impeller is fixedly connected to the main shaft in a sleeving mode; the flow guide cover is connected to the peripheral side of the vortex-shaped impeller in a sleeving mode and covers the two-thirds part of the lower portion of the vortex-shaped impeller. The stirring mechanism guides the lower materials to the upper part of the kettle body, then the blades of the upper one-third part of the vortex-shaped impeller rotate and throw out the materials flowing back upwards to be fully mixed with the materials at the upper part of the kettle body, and the mixed materials at the upper part of the kettle body flow downwards along the inner wall of the kettle body under the rotating power of the vortex-shaped impeller; therefore, the materials can be fully and circularly stirred, mixed and reacted.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment, specifically to a high-efficiency vortex stirred tank for carbonyl synthesis reaction. Background Technology

[0002] Carbonyl synthesis refers to the process by which carbon monoxide and hydrogen react with olefins in the presence of a catalyst and under pressure to produce an aliphatic aldehyde with one more carbon atom than the original olefin used. Therefore, it is also called "aldehyde (reaction)" or "hydroformylation".

[0003] The butanol and octanol production unit uses syngas composed of carbon monoxide and hydrogen to react with propylene through a carbonyl synthesis reaction to produce intermediate products. These intermediate products are then further processed to produce the desired butanol, octanol, and other products. The carbonyl synthesis reaction requires a stirred tank reactor. Existing stirring devices generally use propeller-type stirrers, which consist of several fan-like blades welded to a rotating shaft. This allows for rotational stirring only in a single plane, resulting in poor stirring efficiency and incomplete carbonyl synthesis, leading to a low yield of qualified intermediate products. Utility Model Content

[0004] This invention provides a high-efficiency vortex stirred tank for carbonyl synthesis reaction, which aims to solve the problem that the existing stirring device has poor stirring effect, resulting in incomplete carbonyl synthesis reaction of materials.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] This utility model provides a high-efficiency vortex stirred tank for carbonyl synthesis reaction, including a tank body, a power mechanism, a stirring mechanism, and a control mechanism; the power mechanism is located at the top of the tank body, the stirring mechanism is located inside the tank body, the power mechanism drives the stirring mechanism to operate, and the control mechanism controls the rotation speed of the power mechanism;

[0007] The stirring mechanism includes a main shaft, a vortex impeller, and a flow guide shroud; the main shaft is rotatably arranged along the axis of the vessel body; the vortex impeller has a structure that is smaller at the top and larger at the bottom, and the vortex impeller is sleeved and fixed on the main shaft; the flow guide shroud is sleeved on the outer periphery of the vortex impeller and covers the lower two-thirds of the vortex impeller.

[0008] Furthermore, a feed inlet is provided on the side wall of the vessel near the top, and a discharge outlet is provided on the side wall of the vessel near the bottom; the feed inlet is connected to the feed pipeline via a valve, and the discharge outlet is connected to the discharge pipeline via a valve.

[0009] Furthermore, liquid flow meters are installed on both the feed line and the discharge line, and a level gauge is installed inside the reactor.

[0010] Furthermore, the power mechanism includes a main stirring motor and a reduction mechanism, both of which are located on the top of the vessel body, and the output shaft of the main stirring motor is connected to the input end of the reduction mechanism.

[0011] Furthermore, the top end of the main shaft is connected to the output end of the reduction mechanism, and the bottom end of the main shaft is rotatably disposed at the bottom of the inner cavity of the vessel via a bearing.

[0012] Furthermore, the control mechanism includes a field control cabinet, a DCS control cabinet, and a central control room computer. The field control cabinet is equipped with a programmable logic controller (PLC) and a frequency converter. The DCS control cabinet and the central control room computer are located in the central control room at the rear.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] 1) By setting up a flow guide hood, which is fitted onto the lower two-thirds of the vortex impeller, the material below is guided to the upper part of the vessel. Then, the upper one-third of the blades of the vortex impeller rotate and throw the material flowing back up to mix it thoroughly with the material in the upper part of the vessel. The mixed material in the upper part of the vessel flows downward along the inner wall of the vessel under the rotational power of the vortex impeller. Since the outer diameter of the flow guide hood is smaller than the inner diameter of the vessel, the mixed material flows back to the lower part of the vortex impeller, thereby achieving full circulation, stirring and mixing reaction of the material.

[0015] 2) By setting up a control mechanism, the flow and liquid level data are uploaded to the control mechanism. The process intelligent control program in the DCS control cabinet issues control commands to the programmable controller (PLC) in the field control cabinet in real time according to the specific situation. The PLC controls the frequency converter to adjust the motor speed to the ideal speed. The intelligent control makes the material fully and evenly mixed, which can save manpower and material resources, reduce equipment wear and tear, and also reduce power consumption.

[0016] 3) By setting up a vortex impeller, the material can be stirred up and down in the reactor with high efficiency, which makes the stirring efficiency of the material higher and the reaction of the material more complete, thus resulting in a higher qualification rate of intermediate products. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a cross-sectional view of the present invention; in the figure, the arrows indicate the direction of material flow.

[0020] Figure 3 This is an exploded view of the present invention.

[0021] Figure 4 This is a schematic diagram of a vortex impeller structure.

[0022] In the diagram, 1. Reactor body; 11. Feed inlet; 12. Discharge outlet; 13. Inner wall of reactor; 2. Power mechanism; 21. Main stirring motor; 22. Reduction mechanism; 3. Stirring mechanism; 31. Main shaft; 32. Vortex impeller; 33. Flow guide; 4. Control mechanism; 41. Field control cabinet; 42. DCS control cabinet; 43. Central control room control computer. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] like Figures 1-4 As shown, this utility model provides a high-efficiency vortex stirred tank for carbonyl synthesis reaction, including a tank body 1, a power mechanism 2, a stirring mechanism 3, and a control mechanism 4; the power mechanism 2 is located on the top of the tank body 1, the stirring mechanism 3 is located inside the tank body 1, the power mechanism 2 drives the stirring mechanism 3 to operate, and the control mechanism 4 controls the rotation speed of the power mechanism 2.

[0027] The vessel body 1 is a sealed cylindrical structure with a cylindrical reaction chamber inside. An inlet 11 is located near the top of the side wall of the vessel body 1, and an outlet 12 is located near the bottom of the side wall of the vessel body 1. The inlet 11 is connected to the inlet pipeline via a valve, and the outlet 12 is connected to the outlet pipeline via a valve. Liquid flow meters (not shown in the figure) are installed on both the inlet and outlet pipelines. A level gauge (not shown in the figure) is installed inside the vessel body 1. Data from both the liquid flow meters and the level gauge are transmitted to the control mechanism 4.

[0028] The power mechanism 2 includes a main stirring motor 21 and a reduction gear 22, both of which are located on the top of the vessel body 1. The output shaft of the main stirring motor 21 is connected to the input end of the reduction gear 22, and the output end of the reduction gear 22 is connected to the main shaft 31 of the stirring mechanism 3. The main stirring motor 21 drives the stirring mechanism 3 to rotate through the reduction gear 22. The speed of the main stirring motor 21 is intelligently controlled and adjusted by a frequency converter and a PLC. The control mechanism 4 adjusts and controls the power mechanism 2 according to the liquid level and flow rate in the vessel body 1. The process intelligent control program in the DCS control cabinet 42 issues control commands to the programmable controller PLC in the field control cabinet 41 in real time according to the specific situation. The PLC controls the frequency converter to adjust the motor speed to the ideal speed.

[0029] The stirring mechanism 3 includes a main shaft 31, a vortex impeller 32, and a guide shroud 33, all three being coaxial. The main shaft 31 is rotatably mounted along the axis of the vessel body 1. The top end of the main shaft 31 is connected to the output end of the reduction mechanism 22, and the bottom end of the main shaft 31 is rotatably mounted at the bottom of the inner cavity of the vessel body 1 via a bearing. The vortex impeller 32 has a structure that is smaller at the top and larger at the bottom, resembling an inverted trumpet or cone shape, similar to a vortex fan. Specifically, the side projection shape of the vortex impeller 32 is similar to a trapezoid. The upper end of the blades of the vortex impeller 32 (near the feed inlet 11) is relatively narrow, while the lower end (near the discharge outlet 12) gradually widens. The vortex impeller 32 is sleeved and fixed on the main shaft 31 and can rotate with the main shaft 31. The flow guide shroud 33 is fitted onto the outer periphery of the vortex impeller 32 and covers the lower two-thirds of the vortex impeller 32. This design is to guide the material below to the upper part of the vessel body 1. Then, the upper third of the blades of the vortex impeller 32 rotates and throws the material flowing back up to mix it thoroughly with the material in the upper part of the vessel body 1. The mixed material in the upper part of the vessel body 1 flows downward along the inner wall 13 of the vessel under the rotational power of the vortex impeller 32. Since the outer diameter of the flow guide shroud 33 is smaller than the inner diameter of the vessel body 1, the mixed material flows back to the lower part of the vortex impeller 32, thereby achieving a thorough circulation, stirring, mixing and reaction of the material.

[0030] The control mechanism 4 includes a field control cabinet 41, a DCS control cabinet 42, and a central control room computer 43. The field control cabinet 41 is equipped with a programmable logic controller (PLC) and a frequency converter (neither shown in the figure), used for intelligent control of the motor. The DCS control cabinet 42 and the central control room computer 43 are located in the central control room at the rear. The main stirring motor 21 is connected to the field control cabinet 41, the field control cabinet 41 is connected to the DCS control cabinet 42, and the DCS control cabinet 42 is connected to the central control room computer 43. The intelligent process control program in the DCS control cabinet 42 adjusts and controls the power mechanism 2 according to the liquid level and flow rate in the vessel 1, and sends control commands to the PLC in the field control cabinet 41 in real time. The PLC controls the frequency converter to adjust the motor speed to the ideal speed. Intelligent control ensures that the material is thoroughly and evenly stirred, saving manpower and resources, reducing equipment wear and tear, and also saving power consumption. Generally speaking, the higher the liquid level and the greater the flow rate in the vessel 1, the higher the speed of the main stirring motor 21. The control mechanism 4 and its control process are quite common, and the specific implementation methods and technical details are obvious to those skilled in the art, so they will not be described in detail here.

[0031] When this new device is in operation, first turn on the power of the field control cabinet 41 and start the stirring device. The DCS control cabinet 42 sends control commands to the programmable controller PLC in the field control cabinet 41 in real time through data such as flow rate and liquid level on the vessel body 1. The PLC controls the frequency converter to adjust the motor speed to the ideal speed. During operation, the mechanism is intelligently adjusted according to the real-time changes in data.

[0032] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high efficiency vortex stirred tank for carbonylation synthesis reaction characterized by: Including kettle body (1), power mechanism (2), stirring mechanism (3) and control mechanism (4);The power mechanism (2) is arranged at the top of the kettle body (1), the stirring mechanism (3) is arranged in the kettle body (1), the power mechanism (2) drives the stirring mechanism (3) to operate, and the control mechanism (4) controls the rotating speed of the power mechanism (2); The stirring mechanism (3) includes a main shaft (31), a vortex impeller (32) and a fairing (33);The main shaft (31) is rotatably arranged along the axis of the kettle body (1);The vortex impeller (32) is small in size and large in size, and the vortex impeller (32) is fixedly sleeved on the main shaft (31);The fairing (33) is sleeved on the outer circumferential side of the vortex impeller (32) and covers two-thirds of the vortex impeller (32) below.

2. The high-efficiency vortex stirred tank reactor for carbonyl synthesis reaction according to claim 1, characterized in that: The side wall of the kettle body (1) is provided with a feed inlet (11) near the top position, and the side wall of the kettle body (1) is provided with a discharge outlet (12) near the bottom position;The feed inlet (11) is communicated with the feed pipeline through a valve, and the discharge outlet (12) is communicated with the discharge pipeline through a valve.

3. The high-efficiency vortex stirred tank for carbonyl synthesis reaction according to claim 2, characterized in that: Liquid flow meters are arranged on the feed pipeline and the discharge pipeline, and a liquid level meter is arranged in the kettle body (1).

4. The high-efficiency vortex stirred tank for carbonyl synthesis reaction according to claim 1, characterized in that: The power mechanism (2) includes a stirring main motor (21) and a speed reduction mechanism (22), and the stirring main motor (21) and the speed reduction mechanism (22) are arranged at the top of the kettle body (1), and the output shaft of the stirring main motor (21) is connected with the input end of the speed reduction mechanism (22).

5. The high-efficiency vortex stirred tank for carbonyl synthesis reaction according to claim 4, characterized in that: The top end of the main shaft (31) is connected with the output end of the speed reduction mechanism (22), and the bottom end of the main shaft (31) is rotatably arranged at the bottom of the inner cavity of the kettle body (1) through a bearing.

6. The high-efficiency vortex stirred tank for carbonyl synthesis reaction according to claim 1, characterized in that: The control mechanism (4) includes a field control cabinet (41), a DCS control cabinet (42) and a central control room control computer (43), and the field control cabinet (41) is provided with a programmable controller PLC and a frequency converter.

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