Polyether polymer polyol preparation reaction device

Abstract

The invention relates to the technical field of polyether polymer polyol preparation, and discloses a polyether polymer polyol preparation reaction device which comprises a cooling shell, a reaction kettle is fixedly mounted in the cooling shell, a stirring assembly is arranged along the central axis of the reaction kettle, and a backflow assembly is fixedly mounted on the outer side of the reaction kettle; a liquid feeding assembly is fixedly mounted between the bottom of the reaction kettle and the bottom wall of the cooling shell, and a cooling flow channel is formed in the stirring assembly. The motor drives the hollow rotating shaft to rotate, the stirring blades stir liquid in the reaction kettle, the arc-shaped blades push the liquid in the bottom layer of the reaction kettle into the water outlet pipe, and the liquid passes through the U-shaped pipe and the connecting pipe and flows back into the upper part of the reaction kettle, so that the liquid in the reaction kettle is stirred; therefore, stirring of water in the reaction kettle can be completed only through the motor, water on the bottom layer of the reaction kettle is pumped into the upper layer of the reaction kettle, and the purposes of few driving sources and low energy consumption are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of polyether polymer polyol preparation, in particular to a polyether polymer polyol preparation reaction device. Background Art

[0002] Polyether polymer polyol is the common name for polymer grafted polyether polyol, which is a modified polyol variety made by in-situ polymerization of vinyl monomers (such as styrene, acrylonitrile, etc.) in the presence of a stabilizer, with polyether polyol as the matrix.

[0003] The Chinese patent with application date: 2024-03-04 and announcement number: CN118179410A discloses a high-efficiency reactor for the production of polyether polyols, including a cylinder, a partition fixedly connected inside the cylinder, and a motor fixedly connected to the bottom of the partition. The present invention drives the main stirring blade to rotate through the motor, and the main stirring rod drives the rotating plate to rotate during the rotation of the main stirring rod, and the rotating plate drives the auxiliary stirring rod to rotate around the main stirring rod. The auxiliary stirring rod drives the gear to rotate during the rotation of the auxiliary stirring rod. The gear cooperates with the gear ring to make the auxiliary stirring rod and the auxiliary stirring blade rotate. The auxiliary stirring blade stirs the positions around the inside of the cylinder, and the water pump transports the liquid inside the cylinder to the inside of the stirring barrel. The main stirring rod drives the small pulley, the transmission belt, the large pulley and the stirring element to rotate, and the liquid inside the stirring barrel is stirred. The stirring barrel cooperates with the conveying pipe to transport the liquid to the top of the inside of the cylinder, which has the advantage of efficient production. Through the conveying component, the liquid at the bottom of the kettle body is transported to the top of the kettle body, thereby improving the production efficiency of the reactor.

[0004] In this technical solution, the liquid circulates between the cylinder and the mixing barrel through the suction action of the water pump, and the liquid is stirred in cooperation with the stirring mechanism to improve the stirring efficiency. In this process, multiple driving sources such as water pumps and motors are required for driving, which consumes a lot of energy, so further improvements can be made. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a polyether polymer polyol preparation reaction device, which has the advantages of fewer driving sources and less energy consumption, and solves the problem of many driving sources and high energy consumption.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of less driving source and less energy consumption, the present invention provides the following technical scheme: a polyether polymer polyol preparation reaction device, comprising a cooling shell, a reactor is fixedly installed inside the cooling shell, the cooling shell is filled with water, a feeding pipe is arranged at the top of the reactor, a discharge pipe is arranged at the bottom of the circumferential surface of the reactor, and the feeding pipe and the discharge pipe pass through the cooling shell; a stirring assembly is arranged along the central axis of the reactor, the stirring assembly passes through and is rotatably connected to the reactor, and a reflux assembly is fixedly installed on the outside of the reactor; a liquid feeding assembly is fixedly installed between the bottom of the reactor and the bottom wall of the cooling shell, a cooling flow channel is arranged inside the stirring assembly, the top of the cooling flow channel is connected with the inside of the cooling shell, the liquid feeding assembly is used to transport water in the lower half of the cooling shell to the bottom end of the cooling flow channel, and a guide assembly is arranged at the bottom end of the cooling flow channel.

[0009] Preferably, the stirring assembly includes a motor fixedly mounted on the top of the cooling shell, a hollow rotating shaft fixedly mounted on the bottom output end of the motor, the hollow rotating shaft passes through the top of the cooling shell and the entire reactor, stirring blades are fixed in an array on the outer wall of the middle part of the hollow rotating shaft, an arc-shaped scraper is fixedly mounted on the other end of the stirring blade, the arc-shaped scraper is attached to the inner wall of the reactor, arc-shaped blades are fixed in an array on the outer wall of the lower half of the hollow rotating shaft, the arc-shaped blades are attached to the bottom wall of the reactor, through holes are opened in an array on the surface of the upper half of the hollow rotating shaft, the internal cavity of the hollow rotating shaft and the through holes constitute a cooling channel, and the internal cavity of the hollow rotating shaft is connected to the cooling shell through the through holes.

[0010] Preferably, the reflux assembly includes two groups of water outlet pipes fixedly installed at the bottom of the circumferential surface of the reactor, the water outlet pipes are arranged along the tangent direction of the reactor, and the two groups of water outlet pipes are symmetrical about the center of the reactor; the bottom wall of the water outlet pipe is flush with the bottom wall of the reactor, a U-shaped pipe is fixedly installed at the other end of the water outlet pipe, a connecting pipe is fixedly installed at the other end of the U-shaped pipe, the other end of the connecting pipe is connected to the upper half of the reactor, and the top end of the connecting pipe is located above the arc scraper.

[0011] Preferably, the connecting pipe is spiral-shaped and surrounds the outside of the reaction kettle, and the direction of water flow inside the connecting pipe is opposite to the rotation direction of the hollow shaft.

[0012] Preferably, the liquid delivery component includes a square shell fixedly mounted on the bottom of the reactor, the bottom end of the hollow rotating shaft passes through the interior of the square shell, the front and rear sides of the square shell are connected with fixed tubes, a one-way valve is provided on the fixed tube, a turntable is fixedly mounted on the outer wall of the bottom end of the hollow rotating shaft, and an annular groove is provided on the top of the turntable; two groups of guide rods are fixedly mounted on the left and right side walls of the square shell, the two groups of guide rods on the same side are slidably connected with piston plates, and the two groups of piston plates are fixedly mounted with cross plates on the opposite sides, the cross plate is located in the middle of the top of the piston plate, and a sliding column is fixedly mounted on the bottom of the other end of the cross plate, and the sliding column is slidably connected in the annular groove.

[0013] Preferably, the annular groove includes two groups of small arc grooves, two groups of large arc grooves and four groups of inclined grooves, the arc centers of the small arc grooves and the large arc grooves coincide with the axis of the hollow rotating shaft, the two groups of small arc grooves are distributed front to back, the two groups of large arc grooves are distributed left to right, and the four groups of inclined grooves are respectively connected between the ends of the small arc grooves and the large arc grooves, and the diameter of the small arc groove is smaller than the diameter of the large arc groove.

[0014] Preferably, through grooves are provided on both left and right sides of the square shell.

[0015] Preferably, the guide assembly includes a support frame fixedly installed in the bottom end of the hollow rotating shaft, a piston rod is slidably connected at the center of the support frame, a gasket is fixedly installed at the bottom end of the piston rod, a sealing cone is fixedly installed at the top end of the piston rod, a ring is fixedly installed on the inner wall of the hollow rotating shaft, the sealing cone is frustoconical and its top diameter is larger than its bottom diameter, the circumferential surface of the sealing cone is matched and fits with the inner wall of the ring, a spring is sleeved on the outer side of the piston rod, and both ends of the spring are respectively fixedly installed at the bottom of the support frame and the top of the gasket.

[0016] Preferably, a water inlet pipe is connected to the side of the bottom end of the cooling shell, and a steam pipe is connected to the side of the top end of the cooling shell.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a polyether polymer polyol preparation reaction device, which has the following beneficial effects:

[0019] 1. The polyether polymer polyol preparation reaction device drives the hollow shaft to rotate through a motor, and the stirring blade stirs the liquid inside the reactor. The arc-shaped blade pushes the liquid in the bottom layer of the reactor into the outlet pipe, and the liquid flows back to the upper part of the reactor through the U-shaped pipe and the connecting pipe, thereby stirring the liquid inside the reactor; thus, the water inside the reactor can be stirred only by the motor, and the water at the bottom layer of the reactor can be sucked into the upper layer of the reactor, so as to achieve the purpose of less driving source and low energy consumption;

[0020] 2. The polyether polymer polyol preparation reaction device drives the turntable to rotate when the hollow shaft rotates, so that the two sets of slide columns slide in the annular groove, and the two sets of piston plates move toward or away from each other at the same time; when the two sets of piston plates move away from each other, the inside of the square shell is negatively pressurized, and under the negative pressure state, the sealing cone moves downward to seal the collar, and the water inside the cooling shell passes through the fixed pipe and enters the inside of the square shell; when the two sets of piston plates approach each other, the water inside the square shell is squeezed, so that the sealing cone is lifted upward, the water enters the inside of the hollow shaft, and flows back to the cooling shell through the through hole; the water flowing through the inside of the hollow shaft absorbs the heat inside the reactor; in addition, heat is transferred through the shell of the reactor, so that the temperature inside the reactor is absorbed by the cooling shell, and when the liquid inside the reactor flows through the connecting pipe, the water inside the cooling shell further absorbs heat. Thus, the purpose of ensuring that the temperature inside the reactor remains stable is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional cross-section structure of the cooling shell of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional cross-section structure of the reactor of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0024] Figure 4 A schematic diagram of the three-dimensional structure of a reflux component of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of a top view of a cross-sectional structure of a reactor of a polyether polymer polyol preparation reaction device proposed in the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of a stirring assembly of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0027] Figure 7 It is a schematic diagram of the three-dimensional cross-section structure of a liquid delivery component of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0028] Figure 8 A schematic diagram of the three-dimensional structure of a turntable of a polyether polymer polyol preparation reaction device proposed by the present invention;

[0029] Fig. 9 A polyether polymer polyol preparation reaction device proposed by the present invention Figure 7A is a schematic diagram of the enlarged structure of the details.

[0030] In the figure: 100, cooling shell; 200, reactor; 300, stirring assembly; 400, reflux assembly; 500, liquid delivery assembly; 600, flow guide assembly; 101, water inlet pipe; 102, steam pipe; 201, feeding pipe; 202, discharge pipe; 301, motor; 302, hollow shaft; 303, stirring blade; 304, arc scraper; 305, arc blade; 306, through hole; 401, water outlet pipe; 402, U-shaped Tube; 403, connecting tube; 501, square shell; 502, fixed tube; 503, one-way valve; 504, turntable; 505, annular groove; 506, guide rod; 507, piston plate; 508, cross plate; 509, sliding column; 5051, small arc groove; 5052, large arc groove; 5053, inclined groove; 601, support frame; 602, piston rod; 603, gasket; 604, sealing cone; 605, collar; 606, spring. DETAILED DESCRIPTION

[0031] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 9A polyether polymer polyol preparation reaction device comprises a cooling shell 100, a reactor 200 is fixedly installed inside the cooling shell 100, the cooling shell 100 is filled with water, a water inlet pipe 101 is connected to the side of the bottom end of the cooling shell 100, and a steam pipe 102 is connected to the side of the top end of the cooling shell 100. The water inlet pipe 101 is used to pass hot water into the cooling shell 100 to ensure the temperature inside the reactor 200. Since a large amount of heat is released during the preparation of the polyether polymer polyol, the water temperature inside the cooling shell 100 increases to generate water vapor. The steam pipe 102 is used to discharge the water vapor inside the cooling shell 100. Therefore, the heat is absorbed by the hot water inside the cooling shell 100, so that the temperature inside the reactor 200 is kept within a stable range.

[0034] A feeding pipe 201 is provided at the top of the reactor 200, and a discharging pipe 202 is provided at the bottom of the circumferential surface of the reactor 200. The feeding pipe 201 and the discharging pipe 202 penetrate the cooling shell 100. A stirring assembly 300 is provided along the central axis of the reactor 200, and the stirring assembly 300 penetrates and rotates to be connected to the reactor 200. A reflux assembly 400 is fixedly installed on the outside of the reactor 200; a liquid delivery assembly 500 is fixedly installed between the bottom of the reactor 200 and the bottom wall of the cooling shell 100, and a cooling channel is provided inside the stirring assembly 300. The top of the cooling channel is connected to the inside of the cooling shell 100. The liquid delivery assembly 500 is used to transport the water in the lower half of the cooling shell 100 to the bottom end of the cooling channel, and a flow guide assembly 600 is provided at the bottom end of the cooling channel.

[0035] See also Figure 1 and Figure 3 The stirring assembly 300 includes a motor 301 fixedly mounted on the top of the cooling shell 100, a hollow shaft 302 is fixedly mounted on the bottom output end of the motor 301, the hollow shaft 302 passes through the top of the cooling shell 100 and the entire reactor 200, a stirring blade 303 is fixed in an array on the outer wall of the middle part of the hollow shaft 302, an arc scraper 304 is fixedly mounted on the other end of the stirring blade 303, the arc scraper 304 is attached to the inner wall of the reactor 200, an arc blade 305 is fixed in an array on the outer wall of the lower half of the hollow shaft 302, the arc blade 305 is attached to the bottom wall of the reactor 200, a through hole 306 is opened in an array on the upper half of the surface of the hollow shaft 302, the internal cavity of the hollow shaft 302 and the through hole 306 constitute a cooling channel, and the internal cavity of the hollow shaft 302 is connected to the cooling shell 100 through the through hole 306. The motor 301 drives the hollow shaft 302 to rotate, thereby driving the stirring blades 303 and the arc blades 305 to rotate inside the reactor 200 to stir the liquid inside the reactor 200. At the same time, the water inside the cooling shell 100 flows through the cooling channel to absorb the heat inside the reactor 200 and further cool it down.

[0036] See also Figure 2-Figure 5 , the reflux assembly 400 includes two groups of outlet pipes 401 fixedly installed at the bottom of the circumferential surface of the reactor 200, the outlet pipes 401 are arranged along the tangent direction of the reactor 200, and the two groups of outlet pipes 401 are symmetrical about the center of the reactor 200. The bottom wall of the outlet pipe 401 is flush with the bottom wall of the reactor 200, and a U-shaped pipe 402 is fixedly installed at the other end of the outlet pipe 401. The U-shaped pipe 402 is U-shaped when viewed from the front and arc-shaped when viewed from the top. A connecting pipe 403 is fixedly installed at the other end of the U-shaped pipe 402, and the other end of the connecting pipe 403 is connected to the upper half of the reactor 200, and the top of the connecting pipe 403 is located above the arc scraper 304. The arc blade 305 rotates inside the reactor 200, and under the action of centrifugal force, the liquid inside the reactor 200 flows to the outlet pipe 401, and flows back into the reactor 200 through the U-shaped pipe 402 and the connecting pipe 403. The connecting pipe 403 is spiral and surrounds the outside of the reactor 200. The water flow direction inside the connecting pipe 403 is opposite to the rotation direction of the hollow shaft 302. The spiral design extends the length of the liquid flowing inside the connecting pipe 403, and the liquid inside the connecting pipe 403 is cooled by the water inside the cooling shell 100. The liquid at the bottom layer of the reactor 200 flows back to the upper layer of the reactor 200 through the outlet pipe 401, the U-shaped pipe 402 and the connecting pipe 403, and then the mixing efficiency of the liquid inside the reactor 200 is improved through the stirring effect of the arc scraper 304.

[0037] See also Figure 6-Figure 8 The liquid delivery assembly 500 includes a square shell 501 fixedly mounted at the bottom of the reactor 200, the bottom end of the hollow shaft 302 penetrates into the square shell 501, the front and rear sides of the square shell 501 are connected with fixed pipes 502, and a one-way valve 503 is arranged on the fixed pipe 502, so that the water inside the cooling shell 100 can pass through the fixed pipe 502 and enter the inside of the square shell 501, but cannot enter the cooling shell 100 from the inside of the square shell 501. A turntable 504 is fixedly mounted on the outer wall of the bottom end of the hollow shaft 302, and the length of the turntable 504 is less than the width of the inner cavity of the square shell 501, so that the turntable 504 can rotate inside the square shell 501. An annular groove 505 is provided on the top of the turntable 504.

[0038] The annular groove 505 includes two groups of small arc grooves 5051, two groups of large arc grooves 5052 and four groups of inclined grooves 5053. The arc centers of the small arc grooves 5051 and the large arc grooves 5052 coincide with the axis of the hollow rotating shaft 302. The two groups of small arc grooves 5051 are distributed front to back, and the two groups of large arc grooves 5052 are distributed left to right. The four groups of inclined grooves 5053 are respectively connected between the ends of the small arc grooves 5051 and the large arc grooves 5052. The diameter of the small arc groove 5051 is smaller than the diameter of the large arc groove 5052.

[0039] Two sets of guide rods 506 are fixedly installed on the left and right side walls of the square shell 501. The piston plates 507 are slidably connected to the two sets of guide rods 506 on the same side. The two sets of piston plates 507 are fixedly installed on the opposite side of the two sets of piston plates 507. The horizontal plate 508 is located in the middle of the top of the piston plate 507. The sliding column 509 is fixedly installed on the bottom of the other end of the horizontal plate 508. The sliding column 509 is slidably connected in the annular groove 505. When the rotating disk 504 rotates following the hollow rotating shaft 302, the sliding column 509 slides in the annular groove 505. When the two sets of sliding columns 509 slide in the large arc groove 5052, the distance between the two sets of piston plates 507 is large; when the two sets of sliding columns 509 slide in the small arc groove 5051, the distance between the two sets of piston plates 507 is small; when the two sets of sliding columns 509 slide in the inclined groove 5053, the two sets of piston plates 507 move toward or away from each other. When the two sets of piston plates 507 move away from each other, there is a negative pressure between the two sets of piston plates 507, and the water inside the cooling shell 100 passes through the fixed pipe 502 and enters the inside of the square shell 501. When the two sets of piston plates 507 move closer to each other, the water inside the square shell 501 is pushed into the cooling channel. Through grooves are provided on both sides of the square shell 501. Therefore, when the piston plates 507 move away from each other, the piston plates 507 move closer to the end of the square shell 501, and the water inside the end of the square shell 501 can be discharged from the through grooves.

[0040] See also Figure 7 and Fig. 9 The flow guide assembly 600 includes a support frame 601 fixedly installed in the bottom end of the hollow shaft 302, a piston rod 602 is slidably connected at the center of the support frame 601, a gasket 603 is fixedly installed at the bottom end of the piston rod 602, a sealing cone 604 is fixedly installed at the top end of the piston rod 602, a collar 605 is fixedly installed on the inner wall of the hollow shaft 302, the sealing cone 604 is in a truncated cone shape and its top diameter is larger than its bottom diameter, the circumferential surface of the sealing cone 604 is matched and fitted with the inner wall of the collar 605, a spring 606 is sleeved on the outer side of the piston rod 602, and the two ends of the spring 606 are respectively fixedly installed at the bottom of the support frame 601 and the top of the gasket 603. Due to the elasticity of the spring 606, the sealing cone 604 has a tendency to move downward and seal the collar 605.

[0041] When in use, the motor 301 drives the hollow shaft 302 to rotate, the stirring blades 303 stir the liquid inside the reactor 200, and the arc blades 305 push the liquid in the bottom layer of the reactor 200 into the outlet pipe 401. The liquid passes through the U-shaped pipe 402 and the connecting pipe 403 and flows back to the upper part of the reactor 200, thereby stirring the liquid inside the reactor 200.

[0042] When the hollow shaft 302 rotates, the rotating disk 504 is driven to rotate, so that the two sets of sliding posts 509 slide in the annular groove 505, so that the two sets of piston plates 507 move toward or away from each other at the same time;

[0043] When the two sets of piston plates 507 move in opposite directions, the interior of the square shell 501 is under negative pressure. Under the negative pressure, the sealing cone 604 moves downward to seal the collar 605, and the water inside the cooling shell 100 passes through the fixed pipe 502 and enters the interior of the square shell 501.

[0044] When the two groups of piston plates 507 approach each other, the water inside the square shell 501 is squeezed, so that the sealing cone 604 is pushed up, and the water enters the hollow shaft 302 and flows back to the cooling shell 100 through the through hole 306; the water flowing through the hollow shaft 302 absorbs the heat inside the reactor 200; in addition, heat is transferred through the shell of the reactor 200, so that the temperature inside the reactor 200 is absorbed by the cooling shell 100, and when the liquid inside the reactor 200 flows through the connecting pipe 403, the water inside the cooling shell 100 further absorbs heat.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyether polymer polyol preparation reaction device, comprising a cooling shell (100), Features: A reaction kettle (200) is fixedly installed inside the cooling shell (100), the cooling shell (100) is filled with water, a feeding pipe (201) is arranged at the top of the reaction kettle (200), and a discharge pipe (202) is arranged at the bottom of the circumferential surface of the reaction kettle (200), and the feeding pipe (201) and the discharge pipe (202) penetrate the cooling shell (100); A stirring assembly (300) is arranged along the central axis of the reaction kettle (200), the stirring assembly (300) is rotatably connected to the reaction kettle (200), and a reflux assembly (400) is fixedly installed on the outside of the reaction kettle (200); A liquid delivery component (500) is fixedly installed between the bottom of the reaction kettle (200) and the bottom wall of the cooling shell (100); a cooling channel is arranged inside the stirring component (300); the top of the cooling channel is connected to the inside of the cooling shell (100); the liquid delivery component (500) is used to transport water in the lower half of the cooling shell (100) to the bottom end of the cooling channel; a flow guide component (600) is arranged at the bottom end of the cooling channel.

2. The polyether polymer polyol preparation reaction device according to claim 1, Features: The stirring assembly (300) comprises a motor (301) fixedly mounted on the top of the cooling shell (100); a hollow shaft (302) is fixedly mounted on the bottom output end of the motor (301); the hollow shaft (302) passes through the top of the cooling shell (100) and the entire reactor (200); stirring blades (303) are fixedly mounted in an array on the outer wall of the middle portion of the hollow shaft (302); an arc-shaped scraper (304) is fixedly mounted on the other end of the stirring blade (303); and the arc-shaped scraper (304) is fixedly mounted on the bottom output end of the motor (301). 4) is attached to the inner wall of the reaction kettle (200), the outer wall of the lower half of the hollow shaft (302) is fixed with an array of arc blades (305), the arc blades (305) are attached to the bottom wall of the reaction kettle (200), the upper half of the surface of the hollow shaft (302) is provided with an array of through holes (306), the internal cavity of the hollow shaft (302) and the through holes (306) constitute a cooling channel, and the internal cavity of the hollow shaft (302) is connected to the cooling shell (100) through the through holes (306).

3. The polyether polymer polyol preparation reaction device according to claim 1, Features: The reflux assembly (400) comprises two groups of water outlet pipes (401) fixedly mounted on the bottom of the circumferential surface of the reaction kettle (200), the water outlet pipes (401) being arranged along the tangent direction of the reaction kettle (200), and the two groups of water outlet pipes (401) being symmetrical about the center of the circle of the reaction kettle (200); The bottom wall of the water outlet pipe (401) is flush with the bottom wall of the reaction kettle (200); a U-shaped pipe (402) is fixedly installed at the other end of the water outlet pipe (401); a connecting pipe (403) is fixedly installed at the other end of the U-shaped pipe (402); the other end of the connecting pipe (403) is connected to the upper half of the reaction kettle (200); and the top end of the connecting pipe (403) is located above the arc-shaped scraper (304).

4. The polyether polymer polyol preparation reaction device according to claim 3, Features: The connecting pipe (403) is spiral-shaped and surrounds the outside of the reaction kettle (200). The direction of water flow inside the connecting pipe (403) is opposite to the rotation direction of the hollow rotating shaft (302).

5. The polyether polymer polyol preparation reaction device according to claim 1, Features: The liquid delivery component (500) comprises a square shell (501) fixedly mounted on the bottom of the reaction kettle (200), the bottom end of the hollow rotating shaft (302) penetrates into the square shell (501), the front and rear sides of the square shell (501) are connected with fixed pipes (502), a one-way valve (503) is arranged on the fixed pipe (502), a rotating disk (504) is fixedly mounted on the outer wall of the bottom end of the hollow rotating shaft (302), and an annular groove (505) is arranged on the top of the rotating disk (504); Two groups of guide rods (506) are fixedly installed on the left and right side walls of the square shell (501), and piston plates (507) are slidably connected to the two groups of guide rods (506) on the same side. A cross plate (508) is fixedly installed on the opposite side of the two groups of piston plates (507), and the cross plate (508) is located in the middle of the top of the piston plate (507). A sliding column (509) is fixedly installed on the bottom of the other end of the cross plate (508), and the sliding column (509) is slidably connected in the annular groove (505).

6. The polyether polymer polyol preparation reaction device according to claim 5, Features: The annular groove (505) comprises two groups of small arc grooves (5051), two groups of large arc grooves (5052) and four groups of inclined grooves (5053); the arc centers of the small arc grooves (5051) and the large arc grooves (5052) coincide with the axis of the hollow rotating shaft (302); the two groups of small arc grooves (5051) are distributed front to back; the two groups of large arc grooves (5052) are distributed left to right; the four groups of inclined grooves (5053) are respectively connected between the ends of the small arc grooves (5051) and the ends of the large arc grooves (5052); the diameter of the small arc grooves (5051) is smaller than the diameter of the large arc grooves (5052).

7. The polyether polymer polyol preparation reaction device according to claim 5, Features: Through grooves are formed on both left and right sides of the square shell (501).

8. The polyether polymer polyol preparation reaction device according to claim 1, Features: The guide assembly (600) includes a support frame (601) fixedly installed in the bottom end of the hollow rotating shaft (302), a piston rod (602) is slidably connected to the center of the support frame (601), a gasket (603) is fixedly installed at the bottom end of the piston rod (602), a sealing cone (604) is fixedly installed at the top end of the piston rod (602), and a collar (605) is fixedly installed on the inner wall of the hollow rotating shaft (302). The sealing cone (604) is in the shape of a cone and its top diameter is larger than its bottom diameter. The circumferential surface of the sealing cone (604) is adapted to fit the inner wall of the collar (605). A spring (606) is sleeved on the outer side of the piston rod (602), and the two ends of the spring (606) are respectively fixedly installed at the bottom of the support frame (601) and the top of the gasket (603).

9. The polyether polymer polyol preparation reaction device according to claim 1, Features: The bottom side of the cooling shell (100) is connected to a water inlet pipe (101), and the top side of the cooling shell (100) is connected to a steam pipe (102).

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