Continuous flexible foam polyether polyol preparation equipment

Abstract

According to the continuous soft foam polyether polyol preparation equipment disclosed by the utility model, the material storage barrel and the reaction kettle are connected through the conveyor to realize continuous supply of raw materials, the variable frequency motor in the reaction kettle drives the inclined blade turbo type stirring blade, and a high-precision temperature detection and intelligent temperature control system is matched, so that sufficient and stable reaction is ensured; a reaction product enters the degassing tower through the connecting pipeline and is treated by the condenser and the neutralizing cavity in sequence, and the purity of the product is ensured by a filter screen of the neutralizing cavity. The electronic pressure release valve ensures the pressure safety of the reaction kettle, and the thermal insulation interlayer of the equipment adopts aluminum silicate fiber felt, so that the energy consumption is effectively reduced. The preparation equipment realizes continuous production, improves production efficiency, ensures stable product quality, reduces energy consumption, is convenient to maintain, and powerfully promotes high efficiency and intelligence of flexible foam polyether polyol production.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyether polyol preparation technical field, concretely is a kind of continuous soft bubble polyether polyol preparation equipment. BACKGROUND

[0002] Soft bubble polyether polyol is one of main raw materials for producing polyurethane soft foam plastic, and is widely used in furniture, automotive interior, bedding and other fields.

[0003] Traditional soft bubble polyether polyol preparation process usually adopts intermittent production mode, raw material input and product output are discontinuous, and each batch production needs to go through multiple independent stages such as feeding, reaction, discharging, which takes a long time, and it is difficult to meet the growing demand of soft bubble polyether polyol in the market at present, which seriously limits the expansion of production scale; In the intermittent production process, the feeding amount, reaction conditions and the like are difficult to be completely consistent each time, which makes the quality of different batches of products fluctuate greatly; For example, the slight difference in reaction temperature between batches may lead to different product molecular weight distributions, affecting the performance stability of the product in furniture, automotive interior and other application scenarios; The traditional intermittent reaction equipment has high energy consumption in heating, stirring and other aspects. Due to the discontinuity of the reaction process, the equipment is frequently heated and cooled, and the heat is seriously lost, at the same time, the stirring device has low efficiency, in order to achieve the material mixing effect, a large amount of electric energy needs to be consumed, which increases the production cost; The traditional process relies on more manual operation, from raw material addition, reaction process monitoring to post-processing link, the error and instability of manual operation can easily affect the reliability and accuracy of the production process. For example, it is difficult to achieve high precision for manual control of raw material addition amount, thereby affecting the consistency of reaction.

[0004] Therefore, it is necessary to design a continuous soft bubble polyether polyol preparation equipment to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of continuous soft bubble polyether polyol preparation equipment to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of continuous soft bubble polyether polyol preparation equipment, including reaction kettle and degassing tower respectively, the top of the reaction kettle is fixedly connected with top cover, the top cover is provided with feed inlet on one side above, the inside of the reaction kettle is provided with stirring device, the lower portion of the reaction kettle is provided with discharge port, the periphery of the lower portion of the reaction kettle is fixedly installed with fixed frame body, the base surface of the fixed frame body is fixedly installed with control device, the side of the reaction kettle is also provided with conveyor, the side of the conveyor away from the reaction kettle is also provided with storage cylinder, the inside of the degassing tower is provided with condenser and neutralization cavity from top to bottom respectively, the lower portion of the degassing tower is also connected with discharge pipe, the reaction kettle and the degassing tower are connected with connecting pipeline, the rear side of the reaction kettle is also fixedly installed with detection ladder.

[0008] As the preferred scheme of the utility model, the stirring device includes stirring motor fixedly installed in the middle position of the top of the top cover, the stirring motor is variable frequency motor, the bottom output end of the stirring motor is fixedly connected with rotating shaft through coupling, the outside of the rotating shaft is provided with a plurality of stirring paddles, the shape of the stirring paddle is inclined vane turbine type, the inclination angle is 30-45 °, and the paddle surface is roughened, the bottom of the rotating shaft and the inside bottom end of the reaction kettle are rotatably connected through bearing.

[0009] As the preferred scheme of the utility model, the inside of the reaction kettle is also provided with thermal insulation interlayer, the inside of the thermal insulation interlayer is communicated with cold and hot gas conveying pump body located on the lower portion of the reaction kettle, the other end of the cold and hot gas conveying pump body is connected to temperature adjusting device through pipeline, the temperature adjusting device includes heating device and refrigeration device, the heating device is electric heater, and the refrigeration device is compressor.

[0010] As the preferred scheme of the utility model, the outside of the reaction kettle is also provided with temperature detection probe penetrating into its inside, the temperature detection probe is also electrically connected with control device through cable, the temperature detection probe is platinum resistance temperature sensor, the measurement accuracy is ±0.1 ℃, the response time is less than 5s, can quickly and accurately detect the temperature of the material in the reaction kettle, and real-time temperature data is transmitted to control device, so as to adjust temperature in time.

[0011] As the preferred scheme of the utility model, the rear position of the outside of the reaction kettle is also installed with electronic pressure relief valve, and the control end of the electronic pressure relief valve is electrically connected with control device.

[0012] As the preferred scheme of the utility model, the outside of the neutralizing cavity is provided with a neutralizing agent adding port, a filter screen is installed on the inner wall of the neutralizing cavity close to one side of the discharging pipe, the filter screen is made of stainless steel, the mesh diameter is 0.1-0.3mm, solid impurities in the neutralizing cavity can be effectively filtered, the purity of the polyether polyol product discharged from the discharging pipe is ensured, the filter screen can be disassembled and cleaned, maintenance is convenient, and a discharging pump body is installed on one end of the neutralizing cavity and the discharging pipe.

[0013] As the preferred scheme of the utility model, the bottom of the conveyor is communicated to the inside of the storage cylinder, the top of the conveyor is communicated to the feeding port on the reaction kettle, and a conveying motor is further connected to one side below the conveyor and drives the conveyor.

[0014] As the preferred scheme of the utility model, the material of the heat preservation interlayer is aluminum silicate fiber felt with a heat conductivity coefficient less than 0.05W / m·K, the heat preservation effect is good, the heat loss in the reaction kettle or the external heat transfer can be effectively reduced, the energy consumption is reduced, and the reaction kettle is protected by heat insulation.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In the utility model, the continuous soft bubble polyether polyol preparation equipment can realize the following effects: 1. the equipment is connected with the storage cylinder and the reaction kettle through the conveyor, realizes the continuous supply of raw materials, the material produced by the reaction kettle can be continuously conveyed to the degassing tower through the connecting pipeline, the whole production process is uninterrupted, the production cycle is greatly shortened, compared with the intermittent production, more products can be produced in unit time, and the production efficiency is significantly improved; 2. the heat preservation interlayer is arranged in the reaction kettle, cooperates with the cold and hot gas conveying pump body and the temperature adjusting device, and the high-precision platinum resistance temperature detection probe feeds back temperature data to the control device in real time, the reaction temperature can be accurately adjusted, each batch of reaction is ensured to be carried out under the optimum temperature condition, and the product quality difference caused by temperature fluctuation is reduced; the heat preservation interlayer adopts the aluminum silicate fiber felt material with a heat conductivity coefficient less than 0.05W / (m·K), the heat loss in the reaction kettle or the external heat transfer is effectively reduced, the energy consumption in the temperature adjusting process is reduced, and the energy consumption of heating and refrigeration of the traditional equipment is greatly reduced; 3. the stirring device is driven by the variable frequency motor, the rotating speed can be flexibly adjusted according to the reaction requirement, the stirring paddle with the inclined blade turbine type and the rough surface treatment can make the raw materials fully mix in the reaction kettle, ensures the uniformity of the reaction, and then improves the stability of the product quality; 4. the control device is connected with the temperature detection probe, the electronic pressure relief valve, the stirring motor, the cold and hot gas conveying pump body and other equipment based on the advanced control system, realizes the automatic monitoring and adjustment of the whole production process. The operator can conveniently set parameters through the control device, reduces the manual operation link, improves the reliability and accuracy of the production process, and reduces the influence of manual error on production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the internal structure of the reaction vessel of this utility model;

[0019] Figure 3 This is a top view of the reactor of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the degassing tower of this utility model.

[0021] In the diagram: 1. Reactor; 2. Degassing tower; 3. Top cover; 4. Feed inlet; 5. Stirring device; 51. Stirring motor; 52. Rotating shaft; 53. Stirring blade; 6. Fixed frame; 7. Control device; 8. Conveyor; 9. Storage cylinder; 10. Condenser; 11. Neutralization chamber; 12. Feed pipe; 13. Insulation jacket; 14. Hot and cold gas conveying pump body; 15. Temperature regulating device; 16. Temperature detection probe; 17. Electronic pressure relief valve; 18. Detection ladder; 19. Neutralizing agent addition port; 20. Filter screen; 21. Feed pump body; 22. Connecting pipeline; 23. Conveying motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0024] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "including", "comprising", "having" and the like are specifically intended to be construed in an inclusive sense and not to the exclusion of any other items that can be useful in connection with the subject matter disclosed herein.

[0026] Embodiments, please refer to Figures 1-4 The application provides a technical scheme:

[0027] A continuous soft foam polyether polyol preparation equipment, comprising a reaction kettle 1 and a degassing tower 2, respectively, a top cover 3 is fixedly connected to the top of the reaction kettle 1, the top cover 3 closes the top of the reaction kettle 1, a feeding port 4 is arranged on one side above the top cover 3, a stirring device 5 is arranged in the reaction kettle 1, a discharge port is arranged below the reaction kettle 1, a fixed frame body 6 is fixedly installed outside the reaction kettle 1, the fixed frame body 6 supports and fixes the reaction kettle 1, a control device 7 is fixedly installed on the base surface of the fixed frame body 6, a conveyor 8 is further arranged on one side of the reaction kettle 1, a storage cylinder 9 is further arranged on the side away from the reaction kettle 1 of the conveyor 8, a condenser 10 and a neutralization cavity 11 are arranged in the degassing tower 2 from top to bottom, a discharge pipe 12 is further connected to one side below the degassing tower 2, a connecting pipeline 22 is connected between the reaction kettle 1 and the degassing tower 2, and a detection ladder 18 is further fixedly installed on the rear side of the reaction kettle 1, the detection ladder 18 is used for operators to climb, and the reaction kettle 1 is checked, maintained and the like.

[0028] Specifically, the stirring device 5 comprises a stirring motor 51 fixedly installed at the top middle position of the top cover 3, the stirring motor 51 is a variable frequency motor, a rotating shaft 52 is fixedly connected to the bottom output end of the stirring motor 51 through a shaft coupling, a plurality of stirring paddles 53 are arranged on the outer side of the rotating shaft 52, the stirring paddles 53 are in the shape of inclined impeller turbine, the inclination angle is 30-45°, the paddle surface is roughened, and the bottom of the rotating shaft 52 is rotatably connected to the inner bottom end of the reaction kettle 1 through a bearing; the raw materials enter the reaction kettle 1 through the feeding port 4 by the conveyor 8, then the stirring motor 51 installed at the top middle position of the top cover 3 is started, the stirring motor 51 drives the rotating shaft 52 through the shaft coupling, so that the outer inclined impeller turbine stirring paddles 53 stir the raw materials in the reaction kettle 1; the variable frequency motor can adjust the rotating speed as required, the inclined impeller turbine stirring paddles with roughened surface can fully mix the raw materials, create good conditions for the reaction, and improve the reaction effect and product quality.

[0029] Specifically, the inside of the reaction kettle 1 is also provided with a heat preservation interlayer 13, the material of the heat preservation interlayer 13 is aluminum silicate fiber felt, the thermal conductivity is less than 0.05 W / m·K, the heat preservation effect is good, which can effectively reduce the heat loss in the reaction kettle 1 or the external heat transfer, reduce the energy consumption, at the same time, the heat preservation interlayer 13 plays a certain heat insulation protection role for the reaction kettle 1, the inside of the heat preservation interlayer 13 is connected with the cold and hot gas conveying pump body 14 located on one side below the reaction kettle 1, the other end of the cold and hot gas conveying pump body 14 is connected with the temperature adjusting device 15 through a pipeline, the temperature adjusting device 15 includes a heating device and a refrigeration device, the heating device is an electric heater, and the refrigeration device is a compressor; the outside of the reaction kettle 1 is also provided with a temperature detection probe 16 penetrating into the inside thereof, the temperature detection probe 16 is also electrically connected with the control device 7 through a cable, the temperature detection probe 16 is a platinum resistance temperature sensor, the measurement accuracy is ±0.1℃, the response time is less than 5s, which can quickly and accurately detect the material temperature in the reaction kettle 1 and transmit the temperature data to the control device 7 in real time, so as to adjust the temperature in time; the temperature detection probe 16 detects the material temperature in the reaction kettle 1 in real time and transmits the data to the control device 7. The control device 7 controls the cold and hot gas conveying pump body 14 according to the set temperature, so that the gas circulates in the heat preservation interlayer 13, and the temperature adjusting device 15 is used for heating or refrigeration adjustment of the temperature in the reaction kettle 1; the high-precision temperature detection and accurate adjustment cooperate with the heat preservation interlayer with good heat preservation performance, ensure that the reaction is carried out at a suitable temperature, reduce the adverse effects of temperature fluctuation on the reaction, improve the product quality stability, and at the same time, reduce the energy consumption.

[0030] Specifically, the outside of the reaction kettle 1 is also provided with an electronic pressure relief valve 17 at a rear position, the control end of the electronic pressure relief valve 17 is electrically connected with the control device 7; when the reaction kettle 1 operates, the electronic pressure relief valve 17 monitors the internal pressure in real time, the pressure data is transmitted to the control device 7, when the pressure exceeds the set value, the control device 7 controls the electronic pressure relief valve 17 to open the pressure relief, and the electronic pressure relief valve 17 is automatically closed after the pressure is reduced; the reaction kettle 1 is ensured to operate within a safe pressure range, the danger caused by high pressure is prevented, and the safety of equipment and personnel is ensured.

[0031] Specific, the outside of the neutralization cavity 11 is provided with neutralizing agent adding port 19, the inner wall of the neutralization cavity 11 is installed with filter screen 20 near the side of the blanking pipe 12, the filter screen 20 is stainless steel material, the mesh diameter is 0.1-0.3mm, can effectively filter the solid impurities in the neutralization cavity, guarantee the purity of the polyether polyol product discharged by blanking pipe 12, and the filter screen 20 can be removed and cleaned, convenient maintenance, and the neutralization cavity 11 and the one end of blanking pipe 12 are installed with blanking pump body 21;The material after reaction in the reaction kettle 1 enters the degassing tower 2 through the connecting pipeline 22, is treated first through the condenser 10, then enters the neutralization cavity 11, adds neutralizing agent through the neutralizing agent adding port 19, and the material after neutralization is filtered through the filter screen 20, and is discharged through blanking pump body 21 through blanking pipe 12;Effectively remove the impurities of the material, neutralize the acidity and alkalinity, the filter screen guarantees the purity of the product and is convenient to clean and maintain, and high-quality polyether polyol product is obtained.

[0032] Specific, the bottom of the conveyor 8 is communicated to the inside of the storage cylinder 9, the top of the conveyor 8 is communicated with the feed inlet 4 on the reaction kettle 1, and the lower side of the conveyor 8 is also connected with a conveying motor 23 and is driven by the conveying motor 23;The raw materials in the storage cylinder 9 are conveyed to the reaction kettle 1 through the feed inlet 4 by the conveying motor 23 driving the conveyor 8;Realize continuous and stable supply of raw materials, ensure continuous reaction in the reaction kettle 1, and improve production continuity and efficiency.

[0033] The working process of the utility model: when using the continuous soft bubble polyether polyol preparation equipment, the raw materials required for polyether polyol preparation such as starting agent, catalyst and propylene oxide are stored in the storage cylinder 9, the conveying motor 23 is started, the conveyor 8 is driven to run, the raw materials in the storage cylinder 9 are conveyed to the inside of the reaction kettle 1 through the top opening of the conveyor 8 and the feed inlet 4 on the reaction kettle 1 continuously and stably, raw materials are continuously provided for the reaction, after the raw materials enter the reaction kettle 1, the stirring motor 51 installed on the top middle position of the top cover 3 is started, the stirring motor 51 is a variable frequency motor, the rotating speed can be flexibly adjusted according to the reaction progress and the material characteristics, the rotating shaft 52 is rotated through the coupling, and then the high-speed rotation of the inclined blade turbine type stirring paddle 53 on the outer side of the rotating shaft 52 fully stirs and mixes the raw materials in the reaction kettle 1, and promotes the reaction;

[0034] The temperature detection probe 16 monitors the material temperature in the reaction kettle 1 in real time, and transmits the temperature data to the control device 7 installed on the base surface of the fixed frame body 6 through the cable, the control device 7 controls the cold and hot gas conveying pump body 14 to work according to the preset temperature value, the cold and hot gas conveying pump body 14 conveys the cold and hot gas generated by the temperature adjusting device 15 to the heat preservation interlayer 13 in the reaction kettle 1 to circulate, so as to accurately adjust the temperature in the reaction kettle 1, and ensure that the reaction stably proceeds under suitable temperature conditions;

[0035] During the reaction, the electronic pressure relief valve 17 monitors the pressure inside the reaction kettle 1 in real time, and feeds the pressure data to the control device 7, once the pressure inside the reaction kettle 1 exceeds the safety setting value, the control device 7 controls the electronic pressure relief valve 17 to open immediately, releases the excess pressure, ensures the safe operation of the reaction kettle 1, when the pressure is reduced to the normal range, the electronic pressure relief valve 17 is automatically closed;

[0036] The product completed in the reaction kettle 1 is continuously transported from the discharge port of the reaction kettle 1 to the inside of the degassing tower 2 through the connecting pipeline 22, the product first passes through the condenser 10 at the upper part of the degassing tower 2, the condenser 10 evaporates the unreacted monomer, low boiling point impurities and other impurities contained in the product into gas and condenses and recovers, the product after condensation treatment enters the neutralization cavity 11 at the lower part of the degassing tower 2, the operator adds an appropriate amount of neutralizing agent to the neutralization cavity 11 through the neutralizing agent adding port 19 outside the neutralization cavity 11, adjusts the acidity and alkalinity of the product, and the product after neutralization flows downward under the action of gravity, passes through the filter screen 20 installed on the inner wall of the neutralization cavity 11 close to the one side of the discharge pipe 12, and the filter screen 20 filters out the solid impurities in the product, ensures the purity of the polyether polyol product discharged from the discharge pipe 12, and finally, the discharge pump body 21 is started, and the filtered product is transported to the subsequent storage or processing link through the discharge pipe 12;

[0037] During the operation of the equipment or during the regular maintenance, the operator can climb to the top of the reaction kettle 1 and other positions through the detection ladder 18 fixedly installed at the rear side of the reaction kettle 1, and perform operations such as inspection, repair and maintenance on the equipment. The fixed frame body 6 provides stable support for the reaction kettle 1, ensures the stability of the equipment during operation, and facilitates the maintenance work.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A continuous soft-foamed polyether polyol production apparatus, comprising a reactor (1) and a degassing column (2) respectively, characterized in that: The top of the reactor (1) is fixedly connected with a top cover (3), one side above the top cover (3) is provided with a feeding port (4), the inside of the reactor (1) is provided with a stirring device (5), the lower part of the reactor (1) is provided with a discharge port, the lower part of the reactor (1) is fixedly installed with a fixed frame body (6), the base surface of the fixed frame body (6) is fixedly installed with a control device (7), one side of the reactor (1) is also provided with a conveyor (8), the side away from the reactor (1) of the conveyor (8) is also provided with a storage cylinder (9), the inside of the degassing tower (2) is provided with a condenser (10) and a neutralization cavity (11) from top to bottom, one side below the degassing tower (2) is also connected with a discharge pipe (12), the reactor (1) and the degassing tower (2) are connected with a connecting pipeline (22), the rear side of the reactor (1) is also fixedly installed with a detection ladder (18).

2. A continuous flexible bead polyether polyol production apparatus according to claim 1, characterized in that: The stirring device (5) comprises a stirring motor (51) fixedly installed at the top middle position of the top cover (3), the stirring motor (51) is a variable frequency motor, the bottom output end of the stirring motor (51) is fixedly connected with a rotating shaft (52) through a shaft coupling, the outer side of the rotating shaft (52) is provided with a plurality of stirring paddles (53), the shape of the stirring paddles (53) is inclined turbine type, the inclination angle is 30-45°, and the paddle surface is roughened, and the bottom of the rotating shaft (52) and the inside bottom end of the reactor (1) are rotatably connected through a bearing.

3. A continuous flexible bead polyether polyol production apparatus according to claim 1, characterized in that: The inside of the reactor (1) is also provided with a heat preservation interlayer (13), the inside of the heat preservation interlayer (13) is communicated with a cold and hot gas conveying pump body (14) located on one side below the reactor (1), the other end of the cold and hot gas conveying pump body (14) is connected with a temperature adjusting device (15) through a pipeline, the temperature adjusting device (15) comprises a heating device and a refrigeration device, the heating device is an electric heater, and the refrigeration device is a compressor.

4. The continuous flexible bead polyether polyol production apparatus of claim 1, wherein: The outside of the reactor (1) is also provided with a temperature detection probe (16) penetrating into the inside thereof, the temperature detection probe (16) is also electrically connected with the control device (7) through a cable, the temperature detection probe (16) is a platinum resistance temperature sensor, the measurement accuracy is ±0.1℃, the response time is less than 5s, the material temperature in the reactor (1) can be quickly and accurately detected, and the temperature data can be transmitted to the control device (7) in real time, so that the temperature can be adjusted in time.

5. The continuous flexible bead polyether polyol production apparatus of claim 1, wherein: The rear position of the outside of the reactor (1) is also installed with an electronic pressure relief valve (17), and the control end of the electronic pressure relief valve (17) is electrically connected with the control device (7).

6. A continuous flexible bead polyether polyol production apparatus according to claim 1, characterized by: The outer side of the neutralization cavity (11) is provided with a neutralizing agent adding port (19), and the inner wall of the neutralization cavity (11) is provided with a filter screen (20) near one side of the discharging pipe (12). The filter screen (20) is made of stainless steel, has a mesh diameter of 0.1-0.3 mm, can effectively filter solid impurities in the neutralization cavity, ensures the purity of the polyether polyol product discharged from the discharging pipe (12), and can be disassembled and cleaned, facilitating maintenance. One end of the neutralization cavity (11) and the discharging pipe (12) is provided with a discharging pump body (21).

7. A continuous flexible bead polyether polyol production apparatus according to claim 1, characterized by: The bottom of the conveyor (8) is communicated to the inside of the storage cylinder (9), the upper side of the conveyor (8) is communicated to the feeding port (4) on the reaction kettle (1), and the lower side of the conveyor (8) is further connected with a conveying motor (23) and is driven by the conveying motor (23).

8. A continuous flexible bead polyether polyol production apparatus according to claim 3, characterized by: The thermal conductivity of the thermal insulation interlayer (13) is less than 0.05 W / (m·K), the thermal insulation effect is good, the heat loss in the reaction kettle (1) or the external heat transfer can be effectively reduced, the energy consumption is reduced, and the reaction kettle (1) is protected by heat insulation.

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