An adjustable stirred reactor for the production of butadiene extraction inhibitors
The design of the adjustable stirred reactor solves the problem that the stirring blades cannot fully contact the liquid when the feed rate is low, thus achieving efficient production of butadiene extraction inhibitors, improving mixing uniformity and reaction efficiency, and extending the operating cycle of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGYIN SHENGYUAN TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-08-04
AI Technical Summary
During butadiene production, if the feed rate is lower than the designed volume, the stirring blades cannot fully contact the liquid, resulting in a sharp drop in mixing efficiency. Furthermore, it is easy to generate end polymers or peroxides, leading to scaling and blockage of the equipment and increasing maintenance costs.
An adjustable stirred reactor is designed. The connecting rod and stirring blades are driven to rotate by a rotating component. Combined with a lifting component, the depth of the stirring blades can be adjusted to ensure that they are always immersed below the liquid surface. High-speed turbulence is formed through the turbulence holes to achieve molecular-level dispersion of components such as phenolic compounds.
It enables adjustable depth of stirring blades under low feed conditions, avoids mixing dead zones, improves mixing uniformity and reaction efficiency, prevents side reactions caused by uneven local concentration, and extends the operating cycle of the device.
Smart Images
Figure CN224585910U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of reaction vessel equipment, and in particular to an adjustable stirred reaction vessel for the production of butadiene extraction inhibitors. Background Technology
[0002] In the petrochemical industry, butadiene is an important monomer for the synthesis of rubber and resins. During its production, it is prone to self-polymerization, generating end polymers or peroxides, leading to scaling and blockage of extraction unit trays, reboilers, and pipelines. This significantly shortens the unit's operating cycle and increases maintenance costs. To inhibit this polymerization, highly efficient polymerization inhibitors are needed. Currently, mainstream polymerization inhibitors use phenolic compounds containing 1-2 hydroxyl groups as their core components, possessing metal passivation, dispersion, and cleaning functions, effectively inhibiting the polymerization of butadiene and dienes. The production of these inhibitors requires precise mixing and reaction of multiple raw materials in a reactor, but the production process faces the following technical bottlenecks: When the feed volume is lower than the design volume (such as half-capacity operation), the stirring blades cannot fully contact the liquid, and the mixing efficiency drops sharply. Utility Model Content
[0003] In order to make the stirring depth of the stirring blades adjustable and improve the problem that the stirring blades cannot fully contact the liquid when the feed amount is lower than the design volume, this application provides an adjustable stirred reactor for the production of butadiene extraction inhibitors.
[0004] The adjustable stirred reactor for the production of butadiene extraction inhibitors provided in this application adopts the following technical solution: An adjustable stirred reactor for producing butadiene extraction inhibitors includes a cylindrical body. A rotating block is disposed inside the cylindrical body, and stirring blades are fixedly connected to the rotating block. A connecting rod is connected to the rotating block. The connecting rod is a square rod, and its axis is collinear with the axis of the cylindrical body. A rotating assembly for driving the connecting rod to rotate is disposed at the top of the cylindrical body, and a lifting assembly for driving the connecting rod to rise and fall is also disposed at the top of the cylindrical body.
[0005] Preferably, the stirring blade has turbulence holes for liquid to pass through, and a plurality of turbulence holes are evenly distributed on the stirring blade.
[0006] Preferably, the distance between the stirring blades and the inner wall of the cylinder is less than or equal to 1 cm.
[0007] Preferably, the rotating assembly includes a sealed bearing, a rotating sleeve, a driving pulley, a driven pulley, a track, a fixed frame, and a rotating motor. The sealed bearing is connected to the top of the cylinder, the rotating sleeve is connected inside the sealed bearing, the inner hole of the rotating sleeve is square, the connecting rod slides through the inside of the rotating sleeve, the side wall of the connecting rod slides against the inner wall of the rotating sleeve, the driven pulley is connected to the rotating sleeve, the fixed frame is connected to the top of the cylinder, the rotating motor is connected to the fixed frame, the driving pulley is connected to the end of the rotating motor's output shaft that passes through the fixed frame, and the track is tensioned and wound between the driving pulley and the driven pulley.
[0008] Preferably, the lifting assembly includes a connecting frame, a lifting cylinder, a connecting plate, and a connecting bearing. The connecting frame is connected to the top of the cylinder, the lifting cylinder is connected to the connecting frame and is arranged vertically, the connecting plate is connected to the end of the piston rod of the lifting cylinder, the connecting bearing is connected to the connecting plate, and the end of the connecting rod is connected to the connecting bearing.
[0009] Preferably, a feed pipe is connected to the top of the cylinder, a first solenoid valve is connected to the feed pipe, a discharge pipe is connected to the bottom of the cylinder, the discharge pipe is located at the center of the bottom of the cylinder, and a second solenoid valve is connected to the discharge pipe.
[0010] In summary, this application includes the following beneficial technical effects: This invention provides an adjustable stirred reactor for the production of butadiene extraction inhibitors. A rotating assembly drives a connecting rod, a rotating block, and stirring blades to rotate. A lifting assembly drives the connecting rod to vertically raise and lower the stirring blades, ensuring the stirring blades are always submerged below the liquid surface (even when the feed volume is lower than the design volume). This ensures stirring intensity and reaction uniformity, avoiding the mixing dead zones caused by traditional fixed blades. This achieves adjustable stirring depth, improving the problem of insufficient contact between the stirring blades and the liquid when the feed volume is lower than the design volume.
[0011] This invention provides an adjustable stirred reactor for the production of butadiene extraction inhibitors. The design features a gap of ≤1cm between the stirring blades and the inner wall of the reactor. Combined with the flow-disrupting holes on the blades, this creates high-speed turbulence, forcing the liquid to penetrate the holes and generating shear force. This achieves molecular-level dispersion of components such as phenolic compounds and metal passivators, preventing side reactions caused by uneven local concentrations. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the adjustable stirred reactor used for butadiene extraction polymerization inhibitor production in the embodiments of this application; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram illustrating the internal structure of the cylinder in the embodiments of this application.
[0013] Explanation of reference numerals in the attached drawings: 1. Cylinder; 11. Feed pipe; 111. First solenoid valve; 12. Discharge pipe; 121. Second solenoid valve; 2. Rotating block; 21. Connecting rod; 3. Stirring blade; 31. Turbulence hole; 4. Rotating assembly; 41. Sealed bearing; 42. Rotating sleeve; 43. Driving pulley; 44. Driven pulley; 45. Track; 46. Fixed frame; 47. Rotating motor; 5. Lifting assembly; 51. Connecting frame; 52. Lifting cylinder; 53. Connecting plate; 54. Connecting bearing. Detailed Implementation
[0014] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0016] This application discloses an adjustable stirred reactor for the production of butadiene extraction inhibitors. (Refer to...) Figure 1 , Figure 2 and Figure 3The adjustable stirred reactor for producing butadiene extraction inhibitors includes a cylinder 1, a rotating block 2 inside the cylinder 1, a stirring blade 3 fixedly connected to the rotating block 2, a connecting rod 21 connected to the rotating block 2, the connecting rod 21 being a square rod, the axis of the connecting rod 21 being collinear with the axis of the cylinder 1, a rotating assembly 4 for driving the connecting rod 21 to rotate at the top of the cylinder 1, and a lifting assembly 5 for driving the connecting rod 21 to rise and fall at the top of the cylinder 1.
[0017] The rotating assembly 4 drives the connecting rod 21, the rotating block 2, and the stirring blade 3 to rotate. The lifting assembly 5 drives the connecting rod 21 to move the stirring blade 3 vertically up and down, so that the stirring blade 3 is always immersed below the liquid surface (even if the amount of material fed is lower than the design volume). This ensures the stirring intensity and reaction uniformity, avoids the mixing dead zone caused by traditional fixed blades, and achieves the effect of making the stirring depth of the stirring blade adjustable, thus improving the problem that the stirring blade cannot fully contact the liquid when the amount of material fed is lower than the design volume.
[0018] The stirring blade 3 has turbulence holes 31 for liquid to pass through, and there are several turbulence holes 31 evenly distributed on the stirring blade 3.
[0019] The distance between the stirring blade 3 and the inner wall of the cylinder 1 is less than or equal to 1 cm.
[0020] The design of a gap of ≤1cm between the stirring blade 3 and the inner wall of the cylinder 1, combined with the turbulence holes 31 on the blade, forms a high-speed turbulent flow, which forces the liquid to penetrate the hole and generate shear force, thereby achieving molecular-level dispersion of components such as phenolic compounds and metal passivators, and preventing side reactions caused by uneven local concentration.
[0021] The rotating assembly 4 includes a sealed bearing 41, a rotating sleeve 42, a driving pulley 43, a driven pulley 44, a track 45, a fixed frame 46, and a rotating motor 47. The sealed bearing 41 is connected to the top of the cylinder 1, and the rotating sleeve 42 is connected inside the sealed bearing 41. The inner hole of the rotating sleeve 42 is square. The connecting rod 21 slides through the inside of the rotating sleeve 42, and the side wall of the connecting rod 21 slides against the inner wall of the rotating sleeve 42. The driven pulley 44 is connected to the rotating sleeve 42. The fixed frame 46 is connected to the top of the cylinder 1, and the rotating motor 47 is connected to the fixed frame 46. The driving pulley is connected to the output shaft of the rotating motor 47, which passes through the end of the fixed frame 46. The track 45 is tensioned and wound between the driving pulley 43 and the driven pulley 44.
[0022] The top of the cylinder 1 can be fitted with a protective cover to protect the rotating component 4 (optional).
[0023] The sliding sealing structure of the rotating sleeve 42 and the square connecting rod 21 takes into account both torque transmission and lifting sealing, and prevents butadiene vapor from corroding the drive components; the sealed bearing 41 provides double protection and reduces the frequency of maintenance.
[0024] The lifting assembly 5 includes a connecting frame 51, a lifting cylinder 52, a connecting plate 53, and a connecting bearing 54. The connecting frame 51 is connected to the top of the cylinder 1, the lifting cylinder 52 is connected to the connecting frame 51 and is arranged vertically, the connecting plate 53 is connected to the end of the piston rod of the lifting cylinder 52, the connecting bearing 54 is connected to the connecting plate 53, and the end of the connecting rod 21 is connected to the connecting bearing 54.
[0025] A feed pipe 11 is connected to the top of the cylinder 1, and a first solenoid valve 111 is connected to the feed pipe 11. A discharge pipe 12 is connected to the bottom of the cylinder 1, and the discharge pipe 12 is located at the center of the bottom of the cylinder 1. A second solenoid valve 121 is connected to the discharge pipe 12.
[0026] The implementation principle of the adjustable stirred reactor for producing butadiene extraction inhibitors in this application embodiment is as follows: Step 1: Feeding Open the first solenoid valve 111 of the feed pipe 11 to inject raw materials (including phenolic compounds, solvents, etc.) into the cylinder 1 until the liquid level reaches 40% of the volume.
[0027] Close the first solenoid valve 111 and start the lifting assembly 5.
[0028] Step 2: Adjust the stirring depth The lifting cylinder 52 pushes the connecting plate 53 down, which in turn drives the square connecting rod 21 down through the connecting bearing 54 until the stirring blade 3 is completely immersed in the liquid.
[0029] Adjust the distance between the end of stirring blade 3 and the bottom of the vessel to 5cm.
[0030] Step 3: Initiate the mixed reaction The rotating motor 47 drives the driving pulley 43, which in turn drives the driven pulley 44 to rotate via the track 45. The driven pulley 44 drives the rotating sleeve 42 to transmit torque through the square hole. The rotating sleeve 42 drives the connecting rod 21 to drive the stirring blade 3 to rotate at 120 r / min (example).
[0031] The liquid is propelled by the rotating blades to form an axial flow, which penetrates the turbulence hole 31 to generate a vortex, promoting the full premixing of the polymerization inhibitor component within 15 minutes.
[0032] Step 4: Temperature-controlled reaction Steam is introduced into the jacket of cylinder 1 and heated to 60°C to trigger the main reaction. The stirring blades 3 continuously raise and lower the amplitude by 2cm (optional) to enhance heat transfer. The reaction lasts for 2 hours.
[0033] Step 5: Discharge and Cleaning Open the second solenoid valve 121 of the discharge pipe 12, and the blades descend to the bottom of the vessel to scrape and discharge the finished polymerization inhibitor.
[0034] Inject cleaning solvent, and the stirring blades 3 rise and fall to clean the cylinder wall and turbulence holes 31.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be pointed out that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A tunable stirred tank reactor for the production of butadiene extractive polymerization inhibitors, characterized by: The device includes a cylindrical body (1), inside which a rotating block (2) is provided. A stirring blade (3) is fixedly connected to the rotating block (2). A connecting rod (21) is connected to the rotating block (2). The connecting rod (21) is a square rod. The axis of the connecting rod (21) is collinear with the axis of the cylindrical body (1). A rotating assembly (4) for driving the connecting rod (21) to rotate is provided at the top of the cylindrical body (1). A lifting assembly (5) for driving the connecting rod (21) to rise and fall is also provided at the top of the cylindrical body (1).
2. The adjustable stirred reactor for producing butadiene extraction polymerization inhibitor according to claim 1, characterized in that: The stirring blade (3) is provided with turbulence holes (31) for liquid to pass through, and a number of turbulence holes (31) are evenly arranged on the stirring blade (3).
3. The adjustable stirred reactor for producing butadiene extraction polymerization inhibitor according to claim 1, characterized in that: The distance between the stirring blade (3) and the inner wall of the cylinder (1) is less than or equal to 1 cm.
4. The adjustable stirred reactor for producing butadiene extraction polymerization inhibitor according to claim 1, characterized in that: The rotating assembly (4) includes a sealed bearing (41), a rotating sleeve (42), a driving pulley (43), a driven pulley (44), a track (45), a fixed frame (46), and a rotating motor (47). The sealed bearing (41) is connected to the top of the cylinder (1), and the rotating sleeve (42) is connected inside the sealed bearing (41). The inner hole of the rotating sleeve (42) is square, and the connecting rod (21) slides through the inner hole of the rotating sleeve (42). The side wall of the connecting rod (21) slides against the inner wall of the rotating sleeve (42), the driven pulley (44) is connected to the rotating sleeve (42), the fixed frame (46) is connected to the top of the cylinder (1), the rotating motor (47) is connected to the fixed frame (46), the driving pulley is connected to the output shaft of the rotating motor (47) passing through the end of the fixed frame (46), and the track (45) is tensioned and wound between the driving pulley and the driven pulley (44).
5. The adjustable stirred reactor for producing butadiene extraction polymerization inhibitor according to claim 1, characterized in that: The lifting assembly (5) includes a connecting frame (51), a lifting cylinder (52), a connecting plate (53), and a connecting bearing (54). The connecting frame (51) is connected to the top of the cylinder (1). The lifting cylinder (52) is connected to the connecting frame (51) and is arranged in a vertical direction. The connecting plate (53) is connected to the end of the piston rod of the lifting cylinder (52). The connecting bearing (54) is connected to the connecting plate (53). The end of the connecting rod (21) is connected to the connecting bearing (54).
6. The adjustable stirred reactor for producing butadiene extraction polymerization inhibitor according to claim 1, characterized in that: The top of the cylinder (1) is connected to a feed pipe (11), and a first solenoid valve (111) is connected to the feed pipe (11). The bottom of the cylinder (1) is connected to a discharge pipe (12), which is located at the center of the bottom of the cylinder (1). A second solenoid valve (121) is connected to the discharge pipe (12).