Pilot-scale test kettle for producing polyester polyol

Abstract

The utility model relates to a pilot plant test kettle for producing polyester polyol. The pilot plant test kettle comprises a kettle body and a stirring mechanism, the stirring mechanism comprises a motor, the motor is supported by a motor frame, and the motor frame is mounted at the top of the kettle body; the stirring device further comprises a driving mechanism and a pair of stirring blades; the driving mechanism comprises a top plate and a bottom plate, the two ends of the pair of vertical stirring shafts are connected to the top plate and the bottom plate respectively, and the stirring blades are installed on shaft bodies of the stirring shafts respectively and are perpendicular to each other; a driven wheel is arranged at the top of each stirring shaft, a main shaft of the motor is connected with a driving wheel, two stirring blades which are perpendicular to each other are arranged, a pair of long inclined plates and stirring side windows on the two sides of the pair of long inclined plates are arranged in the stirring blades, and a row of short inclined plates which are arranged in an array are arranged in the stirring side windows, so that stronger stirring force is achieved, and the stirring effect is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a pilot reactor for the production of polyester polyols. Background Technology

[0002] Polyether polyols are environmentally friendly chemical raw materials, widely used in the manufacture of flexible, rigid, and semi-rigid polyurethane foams. They are extensively used in refrigerators, freezers, refrigerated trucks, insulation panels, and pipe insulation. Polyether polyols contain ether bonds and are highly reactive. The polymerization of polyether polyols is achieved by the polymerization of initiators with monomers such as propylene oxide or ethylene oxide. In the initial stage of the polymerization reaction, the reactor is under high temperature and negative pressure. During polymerization, a large amount of heat is generated, causing the system temperature to rise rapidly. The reactor must switch from a heating state to a cooling state within a very short time after the polymerization begins; otherwise, the polymerization system will overheat, leading to dangerous situations such as product yellowing or, in severe cases, safety accidents.

[0003] Currently, existing reactors suffer from low efficiency and unreasonable agitator settings. The typical structure of the agitator is a shaft with multiple fan-like agitator blades evenly distributed along the axis of the shaft, making it difficult to mix multiple materials evenly, resulting in substandard polyether polyols after production. Utility Model Content

[0004] The purpose of this utility model is to provide a pilot reactor for polyester polyol production, solving the problem of insufficient stirring uniformity in the prior art. The specific solution is as follows:

[0005] A pilot reactor for producing polyester polyols includes a reactor body and a stirring mechanism;

[0006] The stirring mechanism includes a motor, which is supported by a motor frame and mounted on the top of the vessel body;

[0007] It also includes a drive mechanism and a pair of stirring blades;

[0008] The driving mechanism includes a top plate and a bottom plate. The top plate is located on the top of the outer side of the vessel body, and the bottom of the bottom plate is provided with a fixing short rod, which is fixed to the bottom of the interior of the vessel body.

[0009] A pair of vertical stirring shafts are connected at both ends to the top plate and the bottom plate, respectively. The stirring blades are respectively mounted on the shafts of the stirring shafts and the two stirring blades are arranged perpendicularly to each other.

[0010] Each of the tops of the stirring shaft is provided with a driven wheel, the main shaft of the motor is connected to the driving wheel, the driving wheel and the driven wheel are both mounted on the top of the top plate and the driving wheel meshes with the driven wheels on both sides;

[0011] The stirring blade includes an outer frame, inside which a pair of long inclined plates extending vertically are arranged. On each side of the pair of long inclined plates, a stirring side window is provided. Inside the stirring side window, a plurality of short inclined plates are arranged in a vertical array and extending laterally.

[0012] Furthermore, the short inclined plates on both sides are tilted in opposite directions.

[0013] Furthermore, a protective cover is provided on the top of the outer side of the vessel body to protect the driving wheel and the driven wheel.

[0014] Optionally, the protective cover is a sheet metal cover.

[0015] The beneficial effects of this utility model are as follows: two mutually perpendicular stirring blades are provided, a pair of long inclined plates and stirring side windows on both sides of the pair of long inclined plates are provided in the stirring blades, and a row of multiple short inclined plates arranged in an array are provided in the stirring side windows, which can achieve stronger stirring force and more uniform stirring effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the stirring assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the stirring assembly from another perspective of the present invention;

[0019] Figure 4 This is a structural diagram of the stirring blade of this utility model;

[0020] in:

[0021] 1-Base;

[0022] 2-Cooker body;

[0023] 3-Motor frame;

[0024] 4-Motor;

[0025] 5-Drive mechanism;

[0026] 6-Agitator blades;

[0027] 51-Top plate, 52-Stirring shaft, 53-Driven wheel, 54-Drive wheel, 55-Bottom plate, 56-Protective cover;

[0028] 551 - Fixed short bar;

[0029] 61-Outer frame, 62-Long inclined plate, 63-Short inclined plate, 6a-Stirring side window. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0031] Please see Figure 1 A pilot reactor for the production of polyester polyols includes a reactor body 2, which is mounted on top of a base 1, and the lower end of a stirring mechanism extends into the interior of the reactor body 2.

[0032] The stirring mechanism includes a motor 4, which is supported by a motor frame 3, and the motor frame 3 is installed on the top of the vessel body 2;

[0033] Please see Figure 2 and Figure 3 It also includes a drive mechanism 5 and a pair of stirring blades 6;

[0034] The driving mechanism 5 includes a top plate 51 and a bottom plate 55. The top plate 51 is located on the top of the outer side of the vessel body 2, and the bottom of the bottom plate 55 is provided with a fixing rod 551, which is fixed to the bottom of the interior of the vessel body 2.

[0035] The two ends of a pair of vertical stirring shafts 52 are respectively connected to the top plate 51 and the bottom plate 55, and the stirring blades 6 are respectively installed on the shaft of the stirring shafts 52 and the two stirring blades 6 are arranged perpendicular to each other.

[0036] Each of the top of the stirring shaft 52 is provided with a driven wheel 53. The main shaft of the motor 4 is connected to the driving wheel 54. The driving wheel 54 and the driven wheel 53 are both installed on the top of the top plate 51 and the driving wheel 54 meshes with the driven wheels 53 on both sides. The stirring shaft 52 rotates around its own axis on the top plate 51 and the bottom plate 55, thereby driving the stirring blade 6 to stir.

[0037] In order to protect the driving wheel 54 and the driven wheels 53 on both sides, a protective cover 56 made of sheet metal is also provided on the top of the outer side of the vessel body 2;

[0038] Please see Figure 4The stirring blade 6 includes an outer frame 61. Inside the outer frame 61, a pair of long inclined plates 62 extending vertically are arranged. On each side of the pair of long inclined plates 62, there is a stirring side window 6a. Inside the stirring side window 6a, there are multiple short inclined plates 63 arranged in a vertical array and extending laterally. The stirring shaft 52 is located between the two long inclined plates 62. The lower end of the left long inclined plate 62 starts from the outer corner of the stirring side window 6a and ends at the junction of the stirring shaft 52 and the outer frame 61. The lower end of the right long inclined plate 62 starts from the junction of the stirring shaft 52 and the outer frame 61 and ends at the corner of the stirring side window 6a and the outer frame 61.

[0039] To increase the stirring force, the short inclined plates 63 on both sides are tilted in opposite directions.

[0040] The innovation of this solution lies in setting two mutually perpendicular stirring blades 6 and improving the structure of the stirring blades 6. The improved stirring blades 6 include an outer frame 61, inside which a pair of long inclined plates 62 and stirring side windows 6a on both sides of the pair of long inclined plates 62 are set. A row of multiple arrayed short inclined plates 63 are set in the stirring side windows 6a. The combined effect of the long inclined plates 62 and the stirring side windows 6a results in a greater stirring force and a more uniform stirring effect. In order to further improve the stirring effect, the inclination directions of the short inclined plates 63 on both sides are opposite, forming a twisting force.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pilot plant for producing a polyester polyol, characterized by comprising: Includes the vessel body and the stirring mechanism; The stirring mechanism includes a motor, which is supported by a motor frame and mounted on the top of the vessel body; It also includes a drive mechanism and a pair of stirring blades; The driving mechanism includes a top plate and a bottom plate. The top plate is located on the top of the outer side of the vessel body, and the bottom of the bottom plate is provided with a fixing short rod, which is fixed to the bottom of the interior of the vessel body. A pair of vertical stirring shafts are connected at both ends to the top plate and the bottom plate, respectively. The stirring blades are respectively mounted on the shafts of the stirring shafts and the two stirring blades are arranged perpendicularly to each other. Each of the tops of the stirring shaft is provided with a driven wheel, the main shaft of the motor is connected to the driving wheel, the driving wheel and the driven wheel are both mounted on the top of the top plate and the driving wheel meshes with the driven wheels on both sides; The stirring blade includes an outer frame, inside which a pair of long inclined plates extending vertically are arranged. On each side of the pair of long inclined plates, a stirring side window is provided. Inside the stirring side window, a plurality of short inclined plates are arranged in a vertical array and extending laterally.

2. The pilot plant for producing polyester polyol according to claim 1, characterized in that, The short inclined plates on both sides are inclined in opposite directions.

3. The pilot plant for producing polyester polyol according to claim 2, characterized in that, The outer top of the vessel body is also provided with a protective cover to protect the driving wheel and the driven wheel.

4. The pilot plant for producing polyester polyol according to claim 3, characterized in that, The protective cover is a sheet metal cover.

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