CN211537715U - Production device for improving sucrose conversion rate for polyether polyol synthesis - Google Patents
Production device for improving sucrose conversion rate for polyether polyol synthesis Download PDFInfo
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- CN211537715U CN211537715U CN201921613186.2U CN201921613186U CN211537715U CN 211537715 U CN211537715 U CN 211537715U CN 201921613186 U CN201921613186 U CN 201921613186U CN 211537715 U CN211537715 U CN 211537715U
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Abstract
The utility model relates to a polyether polyol synthesis is with apparatus for producing that improves sucrose conversion belongs to polyether polyol production facility technical field. The utility model discloses a production device for synthesizing polyether glycol and improving the conversion rate of cane sugar, which comprises a kettle body, a stirring assembly, a feed inlet and a discharge port, wherein the stirring assembly comprises a motor, a stirring shaft and a stirring paddle, the stirring shaft is sequentially provided with a three-blade sweepback stirring paddle and a frame plate stirring paddle from top to bottom, and the end parts of two sides of the frame plate stirring paddle are provided with sharp corners; an annular micropore sieve plate is arranged below the kettle body, and micropores are arranged on the annular micropore sieve plate; the annular micropore sieve plate is positioned above the frame plate type stirring paddle. The utility model has the advantages of being scientific and reasonable in design, the simple operation has improved the sucrose conversion rate, has reduced manufacturing cost, has improved the quality of product.
Description
Technical Field
The utility model relates to a polyether polyol synthesis is with apparatus for producing that improves sucrose conversion belongs to polyether polyol production facility technical field.
Background
At present, in a small experiment for preparing polyether polyol by using sucrose as an initiator and reacting propylene oxide/ethylene oxide, under the condition that the experimental feeding amount is not matched with the volume of a reaction kettle, the phenomenon that the sucrose is stuck to the inner wall of the reaction kettle due to the over-high stirring rotating speed can occur. Since the part of the sucrose can not contact the catalyst at the bottom of the kettle and can not fully contact the polymerized monomer, the reaction is influenced, and a large amount of residual sugar is generated in the product. Thus, on the one hand, the conversion rate of raw materials is reduced, the production cost is increased, and on the other hand, the quality of the product is adversely affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a polyether polyol synthesis is with apparatus for producing that improves sucrose conversion rate, its design scientific and reasonable, the simple operation has improved sucrose conversion rate, has reduced manufacturing cost, has improved the quality of product.
The utility model discloses a production device for synthesizing polyether glycol and improving the conversion rate of cane sugar, which comprises a kettle body, a stirring assembly, a feed inlet and a discharge port, wherein the stirring assembly comprises a motor, a stirring shaft and a stirring paddle, the stirring shaft is sequentially provided with a three-blade sweepback stirring paddle and a frame plate stirring paddle from top to bottom, and the end parts of two sides of the frame plate stirring paddle are provided with sharp corners; an annular micropore sieve plate is arranged below the kettle body, and micropores are arranged on the annular micropore sieve plate; the annular micropore sieve plate is positioned above the frame plate type stirring paddle.
Preferably, the wall thickness of the annular microporous sieve plate is 1-3 cm.
Preferably, the diameter of the micropores is 0.1 to 0.22 mm.
Preferably, the annular microporous sieve plate is made of stainless steel.
Preferably, the ring width of the annular microporous sieve plate is 1/3-2/3 of the radius of the kettle body, and the ring width is 1-8cm in particular.
Preferably, the shape of the microwells is circular or square.
Preferably, the volume of the kettle body is 2-10 liters.
The utility model discloses in the annular micropore sieve that is equipped with, can block cane sugar at the stirring in-process at the reaction initial stage and fly off everywhere, can avoid in the reaction process cane sugar to glue and hang at the reation kettle inner wall to avoided the appearance of the insufficient problem of reaction, and then improved the cane sugar conversion rate, simultaneously because its annular and microporous structure, the initiator of being convenient for contacts fully with epoxypropane/ethylene oxide, can not influence the reaction and normally go on.
The utility model discloses the combination formula stirring rake that is equipped with in is showing and is improving stirring efficiency and mixed effect. Wherein the shear force of the three-blade sweepback stirring paddle is larger, so that the polymerization is convenient and the agglomeration and the block accumulation are avoided; the stirring liquid flow has good circulation characteristics, and can make the liquid generate axial and radial movement simultaneously; so that the liquid is fully circulated to eliminate the nonuniformity of temperature, the heat transfer effect is good, and the discharge amount is large; the liquid phase circulation in the kettle can achieve 5-10 times per minute, the mass transfer effect is good, and the reaction in the kettle can be uniform; can adapt to the change of specific gravity in the polymerization operation process; can replace a plurality of layers of other types of blades by one layer of stirring blades, so that the structure is simplified and the maintenance is convenient. The paddle area of the frame plate type stirring paddle is large, the rotating speed is low, and axial mixing is strengthened under the action of the baffle. The end parts of the blades are longer, and turbulent vortex regions near the blades are larger, so that the dispersion is facilitated, and the materials are not easy to sink at the bottom of the kettle. The closed angle that the both sides tip of frame plate formula stirring rake was equipped with does benefit to and shears sticky material, further improves the mobility of material.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has the advantages of being scientific and reasonable in design, the simple operation has improved the sucrose conversion rate, has reduced manufacturing cost, has improved the quality of product.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the annular microporous sieve plate;
in the figure: 1. a motor; 2. a kettle body; 3. a feed inlet; 4. a stirring shaft; 5. three-blade sweepback stirring paddle; 6. an annular microporous sieve plate; 7. a frame plate type stirring paddle; 8. a discharge port; 9. and (4) micro-pores.
Detailed Description
The present invention is further described with reference to the following examples, which are not intended to limit the practice of the invention.
Example 1
As shown in fig. 1 and 2, the device for producing polyether polyol to improve sucrose conversion rate comprises a kettle body 2, a stirring assembly, a feeding port 3 and a discharging port 8, wherein the stirring assembly comprises a motor 1, a stirring shaft 4 and a stirring paddle, the stirring shaft 4 is sequentially provided with a three-blade sweepback stirring paddle 5 and a frame plate stirring paddle 7 from top to bottom, and the two side ends of the frame plate stirring paddle 7 are provided with sharp corners; an annular micropore sieve plate 6 is arranged below the kettle body 2, and micropores 9 are arranged on the annular micropore sieve plate 6; the annular microporous sieve plate 6 is positioned above the frame plate type stirring paddle 7.
The wall thickness of the annular micropore sieve plate 6 is 3 cm.
The diameter of the micropores 9 is 0.22 mm.
The annular micropore sieve plate 6 is made of stainless steel.
The annular width of the annular micropore sieve plate 6 is 1/3 of the radius of the kettle body 2.
The shape of the micropores 9 is circular.
The volume of the kettle body 2 is 5 liters.
The utility model discloses in annular micropore sieve 6 that is equipped with, can avoid making the cane sugar glue because of stirring rotational speed is too fast among the reaction sequence and hang at the reation kettle inner wall to avoided the appearance of the insufficient problem of reaction, and then improved the cane sugar conversion rate, simultaneously because its annular and microporous structure, the initiator of being convenient for contacts fully with epoxypropane/ethylene oxide, can not influence the reaction and normally go on.
The utility model discloses the combination formula stirring rake that is equipped with in is showing and is improving stirring efficiency and mixed effect. Wherein the three-blade sweepback stirring paddle 5 has larger shearing force, which is convenient for polymerization without agglomeration and accumulation into blocks; the stirring liquid flow has good circulation characteristics, and can make the liquid generate axial and radial movement simultaneously; so that the liquid is fully circulated to eliminate the nonuniformity of temperature, the heat transfer effect is good, and the discharge amount is large; the liquid phase circulation in the kettle can achieve 5-10 times per minute, the mass transfer effect is good, and the reaction in the kettle can be uniform; can adapt to the change of specific gravity in the polymerization operation process; can replace a plurality of layers of other types of blades by one layer of stirring blades, so that the structure is simplified and the maintenance is convenient. The paddle area of the frame plate type stirring paddle 7 is large, the rotating speed is low, and axial mixing is strengthened under the action of the baffle. The end parts of the blades are longer, and turbulent vortex regions near the blades are larger, so that the dispersion is facilitated, and the materials are not easy to sink at the bottom of the kettle. The closed angles arranged at the end parts of the two sides of the frame plate type stirring paddle 7 are beneficial to shearing viscous materials, and the flowability of the materials is further improved.
In the apparatus described above, a polyether polyol synthesis experiment with sucrose as initiator and propylene oxide/ethylene oxide as polymerization monomer was carried out: accurately weighing 320g of cane sugar, 203g of diethylene glycol and 3.25g of potassium hydroxide serving as a catalyst, adding the cane sugar, the diethylene glycol and the potassium hydroxide into the reaction kettle, pressurizing for leakage test, heating to a specified temperature after nitrogen replacement, continuously feeding 1050g of propylene oxide, controlling the temperature continuously during the process, reacting for 2 hours under internal pressure after the propylene oxide is fed, removing monomers to obtain a product intermediate sample, measuring to obtain a hydroxyl value of 430.2mgKOH/g and a viscosity of 3300mPa.s, opening the kettle to collect residual sugar in the kettle after a discharging port is provided with a filter screen for discharging, cleaning polyether with absolute ethanol, filtering, drying, weighing the mass of the residual sugar to be 0.85g, and calculating to obtain the conversion rate of cane sugar to be 99.73%.
Example 2
The structure is the same as in example 1, except that:
the wall thickness of the annular micropore sieve plate 6 is 1 cm.
The diameter of the micropores 9 is 0.20 mm.
The annular micropore sieve plate 6 is made of stainless steel.
The annular width of the annular micropore sieve plate 6 is 2/3 of the radius of the kettle body 2.
The shape of the micropores 9 is square.
The volume of the kettle body 2 is 10 liters.
In the apparatus described above, a polyether polyol synthesis experiment with sucrose as initiator and propylene oxide/ethylene oxide as polymerization monomer was carried out: accurately weighing 320g of sucrose, 203g of diethylene glycol and 3.25g of potassium hydroxide serving as a catalyst, adding the materials into the reaction kettle, pressurizing for leakage test and nitrogen replacement, heating to a specified temperature, continuously feeding 1050g of propylene oxide, controlling the temperature uninterruptedly during the process, reacting for 2 hours at internal pressure after the propylene oxide is fed, removing monomers to obtain a product intermediate sample, measuring to obtain a hydroxyl value of 429.8mgKOH/g and a viscosity of 3230mPa.s, opening the kettle to collect residual sugar in the kettle after a discharge port is filled with a filter screen for discharging, cleaning polyether with absolute ethyl alcohol, filtering, drying, weighing the mass of the residual sugar to be 1.15g, and calculating to obtain the sucrose conversion rate to be 99.64%.
Comparative example 1
In a conventional reaction kettle, a polyether polyol synthesis experiment with sucrose as an initiator and propylene oxide/ethylene oxide as a polymerization monomer was performed: accurately weighing 320g of sucrose, 203g of diethylene glycol and 3.25g of potassium hydroxide serving as a catalyst, adding the materials into the reaction kettle, pressurizing for leakage test and nitrogen replacement, heating to a specified temperature, continuously feeding 1050g of propylene oxide, controlling the temperature uninterruptedly during the process, reacting for 2 hours at internal pressure after the propylene oxide is fed, removing monomers to obtain a product intermediate sample, measuring to obtain a hydroxyl value of 438.5mgKOH/g and a viscosity of 3860mPa.s, opening the kettle to collect residual sugar in the kettle after a discharge port is filled with a filter screen for discharging, cleaning polyether with absolute ethyl alcohol, filtering, drying, weighing the mass of the residual sugar to be 15.35g, and calculating to obtain the sucrose conversion rate of 95.20%.
Claims (7)
1. The utility model provides a polyether polyol synthesis is with apparatus for producing that improves sucrose conversion, includes the cauldron body (2), stirring subassembly, feed inlet (3) and discharge gate (8), and the stirring subassembly includes motor (1), (mixing) shaft (4) and stirring rake, its characterized in that: the stirring shaft (4) is sequentially provided with a three-blade sweepback stirring paddle (5) and a frame plate type stirring paddle (7) from top to bottom, and the end parts of two sides of the frame plate type stirring paddle (7) are provided with sharp corners; an annular micropore sieve plate (6) is arranged below the kettle body (2), and micropores (9) are arranged on the annular micropore sieve plate (6); the annular microporous sieve plate (6) is positioned above the frame plate type stirring paddle (7).
2. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the wall thickness of the annular microporous sieve plate (6) is 1-3 cm.
3. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the diameter of the micropores (9) is 0.1-0.22 mm.
4. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the annular microporous sieve plate (6) is made of stainless steel.
5. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the annular width of the annular microporous sieve plate (6) is 1/3-2/3 of the radius of the kettle body (2).
6. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the shape of the micropores (9) is round or square.
7. The production apparatus for increasing sucrose conversion rate for polyether polyol synthesis according to claim 1, characterized in that: the volume of the kettle body (2) is 2-10 liters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613186.2U CN211537715U (en) | 2019-09-25 | 2019-09-25 | Production device for improving sucrose conversion rate for polyether polyol synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921613186.2U CN211537715U (en) | 2019-09-25 | 2019-09-25 | Production device for improving sucrose conversion rate for polyether polyol synthesis |
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| Publication Number | Publication Date |
|---|---|
| CN211537715U true CN211537715U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921613186.2U Active CN211537715U (en) | 2019-09-25 | 2019-09-25 | Production device for improving sucrose conversion rate for polyether polyol synthesis |
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| CN (1) | CN211537715U (en) |
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- 2019-09-25 CN CN201921613186.2U patent/CN211537715U/en active Active
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