Polyester polyol production device

Abstract

The utility model discloses a polyester polyol production device which comprises a tank body, an outer heating sleeve is arranged in the middle of the tank body, an inner heating sleeve is fixed in the middle of the outer heating sleeve, a material pump used for sucking polyester polyol raw materials in the outer heating sleeve is arranged in the middle of the inner heating sleeve, and the inner heating sleeve is fixed in the inner heating sleeve. An overflow cavity is formed in the top of the inner heating sleeve. The polyester polyol production device has the beneficial effects that the material pump is mounted in the inner heating sleeve, and the overflow cavity and the overflow hole are formed in the top of the inner heating sleeve, so that the production device can effectively avoid excessive adhesion of raw materials in the inner heating sleeve while lifting the polyester polyol production raw materials; meanwhile, the design of a scraping strip I and a scraping strip II is matched, so that the raw materials can be effectively prevented from being adhered to the inner wall of the outer heating sleeve and the outer wall of the inner heating sleeve during stirring production of the polyester polyol raw materials, and the adhesion waste of the polyester polyol after production is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of polyester polyol production, in particular to a polyester polyol production device. Background Art

[0002] Polyester polyols include conventional polyester polyols, polycaprolactone polyols and polycarbonate diols. They contain ester groups or carbonate groups, but in fact, the polyester polyols usually referred to are polyester polyols obtained by condensation reaction of dicarboxylic acids and diols. In the production process of polyester polyols, stirring equipment is used to mix the polyester polyols.

[0003] Chinese patent number CN202223246338.4 discloses a polyester polyol production device, including a reaction tank, a heating jacket is provided at the bottom of the inner wall of the reaction tank, a heating wire 1 is provided inside the heating jacket, a separation jacket is fixedly connected to the bottom of the inner wall of the heating jacket, a heating wire 2 is provided inside the separation jacket, and a motor is fixedly connected to the top of the reaction tank.

[0004] Although the polyester polyol production device described in the above patent can conveniently remove the steam generated during the polyester polyol production process and continuously transport the material at the bottom of the device to the upper side through spiral blades to ensure uniform and rapid mixing of the material, on the one hand, the use of spiral blades to transport the material from the bottom to the top easily leads to a large amount of material adhering to the spiral blades and the inner wall of the separation sleeve after production. On the other hand, under the above stirring method, the material adhering to the outer wall of the separation sleeve and the inner wall of the heating sleeve cannot be effectively scraped off, resulting in serious material waste when the polyester polyol is discharged after production due to a large amount of material adhering to the inside of the device. Utility Model Content

[0005] (1) Technical issues to be resolved

[0006] The technical problem to be solved by the utility model is to provide a polyester polyol production device capable of effectively preventing excessive adhesion of materials inside the device in response to the current status of the existing technology.

[0007] (2) Technical solution

[0008] The utility model is achieved through the following technical solution: The utility model proposes a polyester polyol production device, including a tank body, an external heating jacket is installed in the middle of the tank body, an internal heating jacket is fixed in the middle of the external heating jacket, a material pump for sucking the polyester polyol raw material in the external heating jacket is installed in the middle of the internal heating jacket, an overflow cavity is provided at the top of the internal heating jacket, an overflow hole is provided on the internal heating jacket in a ring shape around the overflow cavity, a stirring frame is arranged between the external heating jacket and the internal heating jacket, a scraper bar 1 is installed on the stirring frame at the contact position with the inner wall of the external heating jacket, a scraper bar 2 is installed on the stirring frame at the contact position with the outer wall of the inner heating jacket, and a motor connected to the stirring frame is also installed in the middle of the top of the tank body.

[0009] Furthermore, the bottom end of the material pump is connected to the external space of the inner heating jacket through a three-way pipe, and the discharge port of the material pump is connected to the overflow chamber through a pipeline.

[0010] By adopting the above technical solution, after the material pump is started, the material at the outer bottom of the inner heating sleeve will be drawn into the overflow chamber, so that the material at the bottom of the device will overflow from the upper part, thereby achieving rapid stirring and mixing of the polyester polyol, and in the process of lifting the material, it can effectively avoid excessive adhesion of the material to the inside of the inner heating sleeve.

[0011] Furthermore, the scraper bar 1 and the scraper bar 2 are both bonded to the stirring frame, and the scraper bar 1 and the scraper bar 2 are both made of rubber strips.

[0012] By adopting the above technical solution, the scraper bar 1 is mainly used to scrape off the material adhered to the inner wall of the outer heating sleeve, and the scraper bar 2 is mainly used to scrape off the material adhered to the outer wall of the inner heating sleeve, thereby effectively avoiding the waste of polyester polyol caused by excessive adhesion after stirring production.

[0013] Furthermore, a feeding pipe is fixed on the top of the tank body on one side of the motor, and the feeding pipe passes through the tank body. The discharge port of the feeding pipe faces the space between the outer heating jacket and the inner heating jacket.

[0014] By adopting the above technical solution, the raw materials for producing polyester polyol can be conveniently added into the stirring space in the tank through the feeding pipe.

[0015] Furthermore, a liquid collecting cavity is formed inside the tank body and outside the external heating jacket, and a drain pipe with a valve and connected to the liquid collecting cavity is fixed to the bottom of one side of the tank body.

[0016] By adopting the above technical solution, the liquid collection chamber is mainly used to collect the steam condensed during the production process of polyester polyol.

[0017] Furthermore, a discharge pipe for conveniently discharging the polyester polyol after stirring production is fixed to one side of the bottom end of the tank body, and three legs are welded in a ring shape on the periphery of the bottom end of the tank body.

[0018] By adopting the above technical solution, the discharge pipe is mainly used to conveniently discharge the finished product material after the polyester polyol is stirred.

[0019] Furthermore, an operation panel is connected to an outer side wall of the tank body through a support rod, and the operation panel is electrically connected to the outer heating jacket, the inner heating jacket, the material pump and the motor.

[0020] By adopting the above technical solution, the outer heating jacket, the inner heating jacket, the material pump and the motor can be controlled by controlling the on-off of the circuit under the action of the operation panel to ensure the efficient production process of polyester polyol.

[0021] (3) Beneficial effects

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In order to solve the problem that the existing polyester polyol production device can conveniently remove the steam generated during the production of polyester polyol and continuously transport the material at the bottom of the device to the upper side through spiral blades to ensure uniform and rapid mixing of the material, on the one hand, the use of spiral blades to transport the material from the bottom to the top easily leads to a large amount of material adhering to the spiral blades and the inner wall of the separation sleeve after production. On the other hand, under the above-mentioned stirring method, it is impossible to effectively scrape off the material adhering to the outer wall of the separation sleeve and the inner wall of the heating sleeve, resulting in serious material waste when the polyester polyol is discharged after production due to a large amount of material adhering to the inside of the device. The utility model installs a material pump in the inner heating sleeve and opens an overflow chamber and an overflow hole on the top of the inner heating sleeve, so that the production device can effectively avoid excessive adhesion of the raw materials inside the inner heating sleeve while lifting the raw materials for polyester polyol production. At the same time, with the design of scraper bar 1 and scraper bar 2, it can effectively avoid the adhesion of the raw materials on the inner wall of the outer heating sleeve and the outer wall of the inner heating sleeve when the polyester polyol raw materials are stirred and produced, thereby effectively avoiding the adhesion and waste of polyester polyol after production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a main cross-sectional view of a tank body in a polyester polyol production device described in the present utility model;

[0025] Figure 2 It is a structural schematic diagram of a polyester polyol production device described in the present utility model.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Feeding pipe; 2. Operation panel; 3. Tank body; 4. Discharge pipe; 5. Support legs; 6. Drain pipe; 7. Motor; 8. Stirring frame; 9. Scraper bar 1; 10. Scraper bar 2; 11. Material pump; 12. Liquid collecting chamber; 13. Inner heating jacket; 14. Outer heating jacket; 15. Overflow hole; 16. Overflow chamber; 17. Support rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1-Figure 2 As shown, a polyester polyol production device in this embodiment includes a tank body 3, an outer heating jacket 14 is installed in the middle of the tank body 3, an inner heating jacket 13 is fixed in the middle of the outer heating jacket 14, and a material pump 11 for sucking the polyester polyol raw material in the outer heating jacket 14 is installed in the middle of the inner heating jacket 13. An overflow chamber 16 is opened on the top of the inner heating jacket 13, and an overflow hole 15 is opened in a ring shape around the overflow chamber 16 on the inner heating jacket 13. After the material pump 11 is started, the material at the outer bottom of the inner heating jacket 13 will be sucked into the overflow chamber 16, so that the material at the bottom of the device overflows from the upper part, thereby realizing rapid stirring and mixing of the polyester polyol. And in the process of lifting the material, it can effectively avoid excessive adhesion of the material inside the internal heating sleeve 13. A stirring frame 8 is arranged between the outer heating sleeve 14 and the inner heating sleeve 13. The contact part of the stirring frame 8 with the inner wall of the outer heating sleeve 14 is installed with a scraper bar 9, and the contact part of the stirring frame 8 with the outer wall of the inner heating sleeve 13 is installed with a scraper bar 2 10. The scraper bar 1 9 is mainly used to scrape off the material adhered to the inner wall of the outer heating sleeve 14, and the scraper bar 2 10 is mainly used to scrape off the material adhered to the outer wall of the inner heating sleeve 13, thereby effectively avoiding the waste of polyester polyol due to excessive adhesion after stirring production. A motor 7 connected to the stirring frame 8 is also installed in the middle of the top of the tank body 3.

[0030] like Figure 1-Figure 2 As shown, in this embodiment, the bottom end of the material pump 11 is connected to the external space of the inner heating sleeve 13 through a three-way pipe, the discharge port of the material pump 11 is connected to the overflow chamber 16 through a pipeline, the scraper bar 1 9 and the scraper bar 2 10 are both bonded to the stirring frame 8, and the scraper bar 1 9 and the scraper bar 2 10 are both made of rubber strips.

[0031] like Figure 1-Figure 2As shown, in this embodiment, a feeding pipe 1 is fixed on the top of the tank body 3 on one side of the motor 7. The feeding pipe 1 passes through the tank body 3, and the discharge port of the feeding pipe 1 is facing the space between the outer heating jacket 14 and the inner heating jacket 13. The raw materials for the production of polyester polyol can be conveniently added to the stirring space in the tank body 3 through the feeding pipe 1. A liquid collecting chamber 12 is also formed on the outside of the outer heating jacket 14 in the tank body 3. A discharge pipe 6 with a valve and connected to the liquid collecting chamber 12 is fixed on the bottom of one side outside the tank body 3. The liquid collecting chamber 12 is mainly used to collect the steam condensed during the production of polyester polyol. A discharge pipe 4 is fixed to one side of the bottom end of the tank body 3 for convenient discharge of the polyester polyol after stirring production. Three legs 5 are welded in a ring shape on the periphery of the bottom end of the tank body 3. The discharge pipe 6 is mainly used to conveniently discharge the finished product material after the polyester polyol is stirred. An operation panel 2 is connected to the outer side wall of the tank body 3 through a support rod 17. The operation panel 2 is electrically connected to the outer heating jacket 14, the inner heating jacket 13, the material pump 11 and the motor 7. Under the action of the operation panel 2, the outer heating jacket 14, the inner heating jacket 13, the material pump 11 and the motor 7 can be controlled by controlling the on and off of the circuit to ensure the efficient production process of the polyester polyol.

[0032] The specific implementation process of this embodiment is as follows: when in use, the polyester polyol production raw materials are first added into the tank body 3 through the feeding pipe 1, and the device is connected to an external power supply. Then, the motor 7, the outer heating sleeve 14, the inner heating sleeve 13 and the material pump 11 are started to put the device into use. During use, the material pump 11 is installed in the inner heating sleeve 13, and an overflow chamber 16 and an overflow hole 15 are opened on the top of the inner heating sleeve 13, so that the production device can effectively avoid excessive adhesion of the raw materials inside the inner heating sleeve 13 while lifting the polyester polyol production raw materials. At the same time, with the design of scraper bar 1 9 and scraper bar 2 10, the raw materials can be effectively avoided from adhering to the inner wall of the outer heating sleeve 14 and the outer wall of the inner heating sleeve 13 when the polyester polyol raw materials are stirred for production, thereby effectively avoiding the waste of polyester polyol adhesion after production.

[0033] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polyester polyol production device, characterized in that: The invention comprises a tank body (3), wherein an outer heating jacket (14) is installed in the middle of the tank body (3), an inner heating jacket (13) is fixed in the middle of the outer heating jacket (14), a material pump (11) for sucking the polyester polyol raw material in the outer heating jacket (14) is installed in the middle of the inner heating jacket (13), an overflow cavity (16) is provided at the top of the inner heating jacket (13), an overflow hole (15) is provided in a ring shape around the overflow cavity (16) on the inner heating jacket (13), a stirring frame (8) is arranged between the outer heating jacket (14) and the inner heating jacket (13), a scraper bar 1 (9) is installed on the stirring frame (8) at a contact portion with the inner wall of the outer heating jacket (14), a scraper bar 2 (10) is installed on the stirring frame (8) at a contact portion with the outer wall of the inner heating jacket (13), and a motor (7) connected to the stirring frame (8) is also installed at the middle of the top of the tank body (3).

2. A polyester polyol production device according to claim 1, characterized in that: The bottom end of the material pump (11) is connected to the external space of the inner heating jacket (13) via a three-way pipe, and the discharge port of the material pump (11) is connected to the overflow chamber (16) via a pipeline.

3. A polyester polyol production device according to claim 1, characterized in that: The scraper strip 1 (9) and the scraper strip 2 (10) are both bonded to the stirring frame (8), and the scraper strip 1 (9) and the scraper strip 2 (10) are both made of rubber strips.

4. A polyester polyol production device according to claim 1, characterized in that: A feeding pipe (1) is fixed to the top of the tank body (3) on one side of the motor (7), and the feeding pipe (1) passes through the tank body (3). The discharge port of the feeding pipe (1) faces the space between the outer heating jacket (14) and the inner heating jacket (13).

5. A polyester polyol production device according to claim 1, characterized in that: A liquid collecting chamber (12) is further formed in the tank body (3) outside the outer heating jacket (14), and a drain pipe (6) with a valve and connected to the liquid collecting chamber (12) is fixed to the bottom of one side outside the tank body (3).

6. A polyester polyol production device according to claim 1, characterized in that: A discharge pipe (4) for conveniently discharging the polyester polyol after stirring production is also fixed to one side of the bottom end of the tank body (3), and three legs (5) are welded in a circular shape on the periphery of the bottom end of the tank body (3).

7. A polyester polyol production device according to claim 1, characterized in that: An operation panel (2) is connected to an outer side wall of the tank body (3) via a support rod (17), and the operation panel (2) is electrically connected to the outer heating jacket (14), the inner heating jacket (13), the material pump (11) and the motor (7).

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