CN102532504A - Synthetic reaction kettle suitable for preparation of carbon dioxide-epoxypropane copolymer - Google Patents

Synthetic reaction kettle suitable for preparation of carbon dioxide-epoxypropane copolymer Download PDF

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Publication number
CN102532504A
CN102532504A CN2011104221692A CN201110422169A CN102532504A CN 102532504 A CN102532504 A CN 102532504A CN 2011104221692 A CN2011104221692 A CN 2011104221692A CN 201110422169 A CN201110422169 A CN 201110422169A CN 102532504 A CN102532504 A CN 102532504A
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China
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kettle
board
blade
rotating shaft
circular arc
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CN2011104221692A
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CN102532504B (en
Inventor
刘明亮
赵晓江
颜焕敏
俞天健
岳金明
王献红
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NINGBO ENGINEERING Co LTD SECOND DESIGN INSTITUTE OF CHEMICAL INDUSTRY
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NINGBO ENGINEERING Co LTD SECOND DESIGN INSTITUTE OF CHEMICAL INDUSTRY
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Publication of CN102532504A publication Critical patent/CN102532504A/en
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Abstract

The invention discloses a synthetic reaction kettle suitable for preparation of carbon dioxide-epoxypropane copolymer, comprising a cylindrical kettle body with a cooling jacket, wherein the kettle body is provided with a material inlet, a gas inlet and a polymer outlet, wherein a central rotating shaft connected with an external motor is longitudinally arranged in the kettle body. The synthetic reaction kettle is characterized in that the kettle comprises three double-internal cooling coilers with three inlets and three outlets from bottom to top, a combined stirrer and a multi-gap combined baffle. When being applied to the carbon dioxide-epoxypropane copolymerization, the reaction kettle has excellent mass and heat transferring performance and has the advantages that the polymerization reaction temperature can be controlled in a range of polymerization temperature plus or minus 1 DEG C and the polymerization reaction rate can be increased by 10-30% when being compared with a polymerization reaction kettle in prior art.

Description

A kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation
Technical field
The present invention relates to a kind of synthesis reaction vessel, especially relate to a kind of synthesis reaction vessel that is applicable to carbon dioxide-epoxypropane copolymer (PPC) industrial preparation.
Background technology
Carbon dioxide-epoxypropane copolymer (PPC) is a kind of novel high polymer material.Because the synthetic of it is to utilize " greenhouse gases " carbonic acid gas as one of synthesis material; As macromolecular material; It has the fully bio-degradable performance; Good oxygen barrier property and good processing characteristics, therefore, its scale preparation enjoys the attention and the extensive concern of material supplier's industry and downstream industry circle.
Existing carbon dioxide-epoxypropane copolymer is through with carbonic acid gas (CO 2) place synthesis reaction vessel with propylene oxide (PO); The intravital temperature and pressure of control still; Making carbonic acid gas and propylene oxide reaction is 60-100 ℃ in temperature, and pressure is directly to react synthetic, the following nCO of reaction formula under the effect of condition and catalyzer of 3.0MPa 2+ n (CH 2) 3O=-[O-(CO)-O (CH 2) 3-] nBut because carbonic acid gas and propylene oxide are respectively gaseous state and fluent meterial; Carbonic acid gas and propylene oxide reaction process medium viscosity are up to 20000CP simultaneously; Can not thorough mixing in this synthesis reaction vessel realize complete reaction, therefore carbonic acid gas and propylene oxide polyreaction inefficiency in this reaction kettle, output capacity is low.
The effective mass-and heat-transfer of polymerization reaction kettle is one of the important factor of sameization of decision polyreaction success or failure, quality product; Therefore people expect that urgently it can be 3.0-4.0MPa at pressure carbon dioxide that research and design goes out a kind of; TR is 60-80 ℃; Final viscosity reaches under the condition of 20000cp, has the reaction synthesized polymer still that is applicable to the carbon dioxide-epoxypropane copolymerization of efficient mass transfer heat transfer property.
At present, document and patent report is not seen in the relevant design that is applicable to the efficient mass transfer heat transfer reaction synthesized polymer still of carbon dioxide-epoxypropane copolymerization so far as yet.
Summary of the invention
Technical problem to be solved by this invention provides a kind of thorough mixing of carbonic acid gas and propylene oxide of realizing and improves the synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation of reaction efficiency and multipolymer output capacity.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation; By the round shape kettle; Combined impeller, 4 equal angles (45 °) many slits combination baffle and two in three groups of spiral coil cooling tubes of cold three outlets of triple feed inlet from bottom to top form.Described kettle has cooling jacket and upright the setting; The upper cover of described kettle is provided with opening for feed and inlet mouth; The lower cover of described kettle is provided with the polymkeric substance discharge port; Be vertically arranged with the central rotating shaft that is connected with outside motor in the described kettle, described central rotating shaft is provided with the built-up type whipping appts.
Described kettle internal diameter is Φ 2000mm, and height is 4000mm, can or dwindle by equal proportion expansion.
Described polymerisate discharge port is characterized in that discharge port is DN200, and the round shape kettle enlarges or dwindles, and the DN value is by the corresponding expansion of equal proportion or dwindle.
Transverse distance between described cooling jacket and described round tube type kettle is 63mm, and the round shape kettle enlarges or dwindles, and spacing is by the corresponding expansion of equal proportion or dwindle.
The withstand voltage 4.5MPa of described kettle.
Described central rotating shaft diameter is 180 mm, high 5450 mm; The round shape kettle enlarges or dwindles, and the diameter of central rotating shaft and height are by the corresponding expansion of equal proportion or dwindle.
Described built-up type whipping appts comprises first whisking appliance, second whisking appliance and the 3rd whisking appliance that fixedly installs successively along described central rotating shaft from top to bottom; Described first whisking appliance comprises two board-like blades of semi arch, and the acute angle angle that two board-like blades of described semi arch and described central rotating shaft form is respectively 45-90 °; Described second whisking appliance comprises the board-like blade of four two/half circular arc, and the acute angle angle that four described board-like blades of two/half circular arc and described central rotating shaft form is respectively 0-45 °; Described the 3rd whisking appliance is the plate and frame blade that is symmetricly set on described central rotating shaft both sides.
Described first whisking appliance also comprises first axle sleeve, and the position, the center of circle of two board-like blades of described semi arch is separately fixed on described first axle sleeve, and the described first axle sleeve permanent sleeve is located on the described central rotating shaft.
Described second whisking appliance also comprises second axle sleeve; The position, the center of circle of four board-like blades of described two/half circular arc is separately fixed on described second axle sleeve; The described second axle sleeve permanent sleeve is located on the described central rotating shaft; Four board-like blades of described two/half circular arc are respectively the board-like blade of the one or two/half circular arc, the board-like blade of the two or two/half circular arc, the board-like blade of the three or two/half circular arc and the board-like blade of the four or two/half circular arc; Described board-like blade of the one or two/half circular arc and the board-like blade of described the two or two/half circular arc laterally arrange and oppositely are 180 °, and the described board-like blade of the three or two/half circular arc and described the four or two/half circular arc be board-like to laterally arrange and oppositely be 180 °.
Described plate and frame blade is provided with and is used to reduce the flow downward through hole of resistance of reaction mass.Distance between the bottom of the along the line and described kettle in the end of described plate and frame blade is 1/80 of a described kettle height.
Described central rotating shaft is provided with the spiral conveying blade that is used for carrying mixed reaction solution downwards; The direction of rotation of the spiral direction and the described central rotating shaft of the one-body molded and described spiral conveying blade of described spiral conveying blade and described central rotating shaft; The distance between the two ends up and down of described spiral conveying blade be described central rotating shaft length 1/8, the lower end of described spiral conveying blade is near described first whisking appliance.
Described spiral conveying blade height is 500mm, and is on the liquid level and highly is 300mm, and being in liquid level under is 200mm highly, and described spiral conveying blade diameter is 300mm; The round shape kettle enlarges or dwindles, highly, on the liquid level under value, the liquid level value and diameter by the corresponding expansion of equal proportion or dwindle.
The inwall of described kettle is provided with spiral coil cooling tube, is used for fixing many slits combination baffle that supports described spiral coil cooling tube and the fixed support that supports described many slits combination baffle; 4 described many slits combination baffle equal angles (45 °) are distributed on the inwall of described kettle; Described many slits combination baffle comprises angle steel, band steel and baffle plate; Described fixed support is distributed on the lower end of the inwall of described kettle; Described angle steel, described band steel and described baffle plate vertically are weldingly fixed on the described fixed support; Described angle steel and described band steel laterally interfix through bolt, and the sidepiece end face of described angle steel is near described baffle plate, and described spiral coil cooling tube is fixed in described baffle plate and the described angle steel.
The model of described angle steel is 80mm * 80mm * 8mm, highly is 2850mm; The round shape kettle enlarges or dwindles, and it constitutes angle steel specification and height by the corresponding expansion of equal proportion or dwindle.
The thickness of described band steel is 10mm, and width is 60mm, highly is 2850mm; The spacing of the inwall of described band steel and described kettle is 29.5mm; The round shape kettle enlarges or dwindles, band steel thickness, and the spacing between band steel width, band steel and the inner wall of kettle is by the corresponding expansion of equal proportion or dwindle.
Described baffle plate thickness is 50mm, highly is 2850mm.
Three groups of spiral coil cooling tubes of cold three outlets of triple feed inlet are from bottom to top formed by stainless steel tube dish system in described pair, and by angle steel and the fixing formation of band steel; The stainless steel tube wall thickness is 3.5mm, and external diameter is Φ 57mm, and described spiral coil cooling tube total height is 2500mm; It is 25 circles that described spiral coil cooling tube always encloses ring, and the middle groups spiral coil cooling tube is 9 circles, on; Two groups respectively is 8 circles down, and described spiral coil cooling tube comprises outer cooling coil and interior cooling coil, and described outer cooling coil central diameter is 1864mm; The cooling coil central diameter is 1650mm in described; Spacing between described outer cooling coil and the described interior cooling coil is 60mm, and the coil pipe interlayer between centers of described outer cooling coil and described interior cooling coil is respectively 100mm, and the gap of the coil pipe interlayer of described outer cooling coil and described interior cooling coil is respectively 43mm; The round shape kettle enlarges or when dwindling, and coil pipe central diameter, internal and external disk tube spacing, coil pipe interlayer between centers and coil pipe interlamellar spacing are by the corresponding expansion of equal proportion or dwindle.
Spacing between the end of two board-like blades of described semi arch and the described many slits combination baffle is respectively 1/25~1/20 of described kettle diameter; The end of four board-like blades of described two/half circular arc and the spacing between the combination baffle of described many slits are respectively 1/25~1/20 of described kettle diameter, and the distance between the bottom of the along the line and described kettle in the end of described plate and frame blade is 1/80 of a described kettle height.
The upper cover of described kettle also is provided with combined impeller installation opening, catalyzer inlet, carbonic acid gas export mouth, pressure monitoring, monitoring temperature and blasting piece device docking port.Described combined impeller installation opening is DN500; Described catalyzer inlet is DN80; Described propylene oxide pump intake is DN80, and described carbonic acid gas intake is DN100, and described carbonic acid gas export mouth is DN150; Described pressure monitoring and described monitoring temperature docking port are DN25, and described blasting piece device docking port is DN150; The round shape kettle enlarges or dwindles, and the DN value of each installing port is by the corresponding expansion of equal proportion or dwindle.
Compared with prior art; The invention has the advantages that: a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation of the present invention; Kettle uprightly is provided with; Its central rotating shaft is provided with the built-up type whipping appts, and this built-up type whipping appts comprises first whisking appliance, second whisking appliance and the 3rd whisking appliance that sets gradually along central rotating shaft, because first whisking appliance comprises two board-like blades of semi arch; The acute angle angle that two board-like blades of semi arch and described central rotating shaft form is respectively 45-90 °, and through decomposition of force reaction solution being circulated in the residing distance segment of first whisking appliance with hoop is main vertical the flowing of taking into account simultaneously; Because second whisking appliance comprises the board-like blade of four two/half circular arc; The acute angle angle that the board-like blade of four two/half circular arc and central rotating shaft form is respectively 0-45 °, and making reaction solution through decomposition of force serves as mainly to take into account hoop simultaneously and circulate with vertical flowing in the residing distance segment of second whisking appliance; Because the 3rd whisking appliance is the plate and frame blade that is symmetricly set on the central rotating shaft both sides; The plate and frame blade is provided with material and sees through slotted hole; Reaction solution hoop in the residing distance segment of the 3rd whisking appliance is circulated; Rely on the effect of gravity, make reaction product finally flow out the polymkeric substance discharge port, gaseous carbon dioxide is mixed more evenly fully with liquid propylene oxide through said process; Improved reaction efficiency, compared the carbon dioxide-epoxypropane copolymer output capacity with existing synthesis reaction vessel and improved 10-30%.
Further because first whisking appliance also comprises first axle sleeve; The position, the center of circle of two board-like blades of semi arch is separately fixed on first axle sleeve; The first axle sleeve permanent sleeve is located on the central rotating shaft, makes in gaseous carbon dioxide and the liquid propylene oxide mixing process stressed more even.
Further because second whisking appliance also comprises second axle sleeve; The position, the center of circle of the board-like blade of four two/half circular arc is separately fixed on described second axle sleeve; The described second axle sleeve permanent sleeve is located on the described central rotating shaft; Four board-like blades of described two/half circular arc are respectively the board-like blade of the one or two/half circular arc, the board-like blade of the two or two/half circular arc, the board-like blade of the three or two/half circular arc and the board-like blade of the four or two/half circular arc; Described board-like blade of the one or two/half circular arc and the board-like blade of described the two or two/half circular arc laterally arrange and oppositely are 180 °; The described board-like blade of the three or two/half circular arc and described the four or two/half circular arc be board-like to laterally arrange and oppositely is 180 °; Make in gaseous carbon dioxide and the liquid propylene oxide mixing process turbulivity bigger, increase mixed effect, make stressed more even.
Further make the reaction mass minimizing resistance that flows downward because the plate and frame blade is provided with through hole, the both side ends of this plate and frame blade helps the driving a reaction material and along the circumferential direction moves along same direction bending certain angle, realizes the better mixing of material.
Further because central rotating shaft is provided with the spiral conveying blade that is used for carrying mixed reaction solution downwards; One-body molded and the shape distribution in the shape of a spiral of spiral conveying blade and central rotating shaft; Distance between the two ends of spiral conveying blade be central rotating shaft length 1/8; Because carbonic acid gas and propylene oxide reaction process medium viscosity are up to 20000CP, central rotating shaft makes mucus be easy to generate the anti-phenomenon of climbing in rotating process, and spiral conveying blade leads to reverse rotation; Produce and carry mucous power that mucus is constantly carried downwards downwards, thereby prevent anti-generation of climbing phenomenon.
Because the inwall of kettle is provided with spiral coil cooling tube, many slits combination baffle and fixed support; Many slits combination baffle comprises angle steel, band steel and baffle plate; Fixed support is distributed on the lower end of the inwall of kettle, and angle steel, band steel and baffle plate vertically are weldingly fixed on the fixed support, and angle steel and band steel laterally interfix through bolt; The sidepiece end face of angle steel is near baffle plate; Spiral coil cooling tube is fixed in baffle plate and the angle steel, and in the reaction process, educt flow overcooling coil pipe slit and band steel help control reaction temperature with the space (reaction mass is better contacted with the cooling jacket that the kettle outer wall is provided with) of inner wall of kettle; Make carbonic acid gas and propylene oxide reaction in temperature remains on 65 ± 1 ℃ of scopes; Reaction mass receives through the baffle effect through angle steel, band steel and baffle plate simultaneously, and producing bigger turbulent flow power increases mixed effect, makes reaction more abundant.
In sum, the combination that the present invention is a kind of to be applicable to the synthesis reaction vessel of carbon dioxide-epoxy propane copolymer preparation stir the various flows that forms to the mixed flow mutual superposition, not residual dead angle; Stir with the anchor formula or the grid formula stirs to compare and can make polymerization rate improve 10-30%; Polymeric reaction temperature can accurately be controlled at ± 1 ℃ scope in; This synthesis reaction vessel can be 3.0-4.0MPa at pressure carbon dioxide; TR is 60-80 ℃; Final viscosity reaches under the condition of 20000cp, has the efficient mass transfer heat transfer property, has improved polymerization rate and multipolymer output capacity.
Description of drawings
Fig. 1 is a synthesis reaction vessel structural representation of the present invention;
Fig. 2 is the plan structure synoptic diagram of first whisking appliance of the present invention;
Fig. 3 is the structural representation of facing of first whisking appliance of the present invention;
Fig. 4 is the structural representation of second whisking appliance of the present invention;
Fig. 5 is the structural representation of facing of second whisking appliance of the present invention;
Fig. 6 is the structural representation of facing of the 3rd whisking appliance of the present invention;
Fig. 7 is the plan structure synoptic diagram of the 3rd whisking appliance of the present invention;
Fig. 8 is the horizontal cross of round shape kettle of the present invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
With embodiment the present invention is described further below, but protection scope of the present invention is not limited to this, protection domain is as the criterion with claim.
Specific embodiment
A kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation of the present invention; As shown in Figure 1; Comprise the columnar kettle 1 that has cooling jacket 10, kettle 1 uprightly is provided with, and the upper cover of kettle 1 is provided with opening for feed 2 and inlet mouth 3; The lower cover of kettle 1 is provided with polymkeric substance discharge port 4; Be vertically arranged with the central rotating shaft 6 that is connected with outside motor 5 in the kettle 1, central rotating shaft 6 is provided with the built-up type whipping appts, and the built-up type whipping appts comprises first whisking appliance 7, second whisking appliance 8 and the 3rd whisking appliance 9 that sets gradually along central rotating shaft 6; First whisking appliance 7 comprises that board-like blade 71 of 71, two semi arches of two board-like blades of semi arch and the acute angle angle that central rotating shaft 6 forms are respectively 45-90 °; Second whisking appliance 8 comprises that board-like blade 81 of 81, four two/half circular arc of the board-like blade of four two/half circular arc and the acute angle angle that central rotating shaft 6 forms are respectively 0-45 °; The 3rd whisking appliance 9 is for being symmetricly set on the plate and frame blade of central rotating shaft 6 both sides.
In this specific embodiment, this round shape kettle 1 internal diameter is 2000mm, and height is 4000mm, can or dwindle by equal proportion expansion.Polymerisate discharge port 4 is DN200, and the round shape kettle enlarges or dwindles, and the bore of polymerisate discharge port 4 is by the corresponding expansion of equal proportion or dwindle.The transverse distance that above-mentioned cooling jacket 10 and round tube type kettle are 1 is 63mm, and the round shape kettle enlarges or dwindles, and spacing is by the corresponding expansion of equal proportion or dwindle.Kettle 1 withstand voltage 4.5MPa.Above-mentioned central rotating shaft 6 diameters are 180 mm, high 5450 mm; Round shape kettle 1 enlarges or dwindles, and the diameter of central rotating shaft 6 and height are by the corresponding expansion of equal proportion or dwindle.
In this specific embodiment, as shown in Figure 2, first whisking appliance 7 comprises that also the position, the center of circle of 72, two board-like blades 71 of semi arch of first axle sleeve is separately fixed on first axle sleeve 72, and first axle sleeve, 72 permanent sleeves are located on the central rotating shaft 6.The model of two board-like blade 71 compositions of semi arch is that the end and the spacing between the combination baffle of many slits of the blade of FZBK-1300-180s is 86.5mm; The hybrid reaction material contacts with many slits combination baffle and can produce bigger turbulivity increase mixed effect under this spacing; Make reaction more abundant; Round shape kettle 1 enlarges or dwindles, and the spacing between the end of blade and the many slits combination baffle is by the corresponding expansion of equal proportion or dwindle.Be illustrated in figure 3 as example, two board-like blades 71 of semi arch are respectively 53 ° with the acute angle angle that central rotating shaft 6 forms.
In this specific embodiment; As shown in Figure 4; Second whisking appliance 8 also comprises second axle sleeve 82; The position, the center of circle of the board-like blade 81 of four two/half circular arc is separately fixed on second axle sleeve 82; Second axle sleeve, 82 permanent sleeves are located on the central rotating shaft 6; The board-like blade 81 of four two/half circular arc is respectively the board-like blade of the one or two/half circular arc board-like board-like blade 813 of blade the 812, the 3 2/half circular arc of board-like blade the 811, the 2 2/half circular arc and the four or two/half circular arc 814, the one or the two/board-like blade 811 of half circular arc and the board-like blade 812 of the two or two/half circular arc and laterally arranges and oppositely be 180 °, and board-like blade 813 of the three or two/half circular arc and the board-like blade 814 of the four or two/half circular arc laterally arrange and oppositely be 180 °.The model that the board-like blade of four two/half circular arc is formed is that the end and the spacing between the combination baffle of many slits of ZBK-1300-180s blade is 86.5mm; The hybrid reaction material contacts with many slits combination baffle and can produce bigger turbulivity increase mixed effect under this spacing; Make reaction more abundant; Round shape kettle 1 enlarges or dwindles, and the spacing between the end of blade and the many slits combination baffle is by the corresponding expansion of equal proportion or dwindle.As shown in Figure 5, the board-like blade 81 of four two/half circular arc is respectively 37 ° with the acute angle angle that central rotating shaft 6 forms.
In this specific embodiment; Like Fig. 6, shown in Figure 7, the 3rd whisking appliance 9 comprises also and also comprises the 3rd axle sleeve 93 that the plate and frame blade is fixed on three axle sleeves 93; The plate and frame blade is provided with and is used to reduce the flow downward through hole 91 of resistance of reaction mass; The both side ends of this plate and frame blade forms a folded end 92 along same direction bending certain angle, helps the driving a reaction material and along the circumferential direction moves, and realizes the better mixing of material.Model is that the distance between the bottom of bottom and kettle 1 of BKS-1300-180s plate and frame blade 9 is 50mm,, round shape kettle 1 enlarges or dwindles, and this spacing is by the corresponding expansion of equal proportion or dwindle.
In this specific embodiment; Central rotating shaft 6 is provided with the spiral conveying blade 11 that is used for carrying mixed reaction solution downwards; The direction of rotation of the spiral direction and the central rotating shaft 6 of the one-body molded and spiral conveying blade 11 of spiral conveying blade 11 and central rotating shaft 6; The distance between the two ends up and down of spiral conveying blade 11 be central rotating shaft 6 length 1/8, the lower end of spiral conveying blade 11 is near first whisking appliance 7.Wherein spiral conveying blade 11 is 500mm highly, and is on the liquid level and highly is 300mm, and being in liquid level under is 200mm highly, and spiral conveying blade 11 diameters are 300mm; Round shape kettle 1 enlarges or dwindles, highly, on the liquid level under value, the liquid level value and diameter by the corresponding expansion of equal proportion or dwindle.
In this specific embodiment; As shown in Figure 8; The inwall of kettle 1 is provided with spiral coil cooling tube 12, (many slits combination baffle 13 is four groups in the present embodiment to be used for fixing the many slits combination baffle 13 that supports spiral coil cooling tube 12; Be distributed on the inwall of kettle 1) and the fixed support 14 (four fixed supports 14 are arranged accordingly) of many slits combination baffle 13, many slits combination baffle 13 comprises angle steel 131, band steel 132 and baffle plate 133, fixed support 14 is distributed on the lower end of the inwall of kettle 1; Angle steel 131, band steel 132 and baffle plate 133 vertically are weldingly fixed on the fixed support 14; Angle steel 131 laterally interfixes through bolt 134 with band steel 132, and the sidepiece end face of angle steel 131 is near baffle plate 133, and spiral coil cooling tube 12 is fixed in baffle plate 133 and the angle steel 131.
Wherein, the specification of angle steel 131 is 80mm * 80mm * 8mm, highly is 2850mm; Round shape kettle 1 enlarges or dwindles, and it constitutes angle steel 131 specifications and height by the corresponding expansion of equal proportion or dwindle; The thickness of band steel 132 is 10mm; Width is 60mm; Highly be 2850mm, the spacing of the inwall of band steel 132 and kettle 1 is 29.5mm, and round shape kettle 1 enlarges or dwindles; The thickness of band steel 132, the spacing between the inwall of the width of band steel 132, band steel 132 and kettle 1 is by the corresponding expansion of equal proportion or dwindle; Baffle plate 133 thickness are 50mm, highly are 2850mm, and round shape kettle 1 enlarges or dwindles, and the thickness of baffle plate 133 and height are by the corresponding expansion of equal proportion or dwindle.
In this specific embodiment, three groups of spiral coil cooling tubes 12 of cold three outlets of triple feed inlet are from bottom to top formed by stainless steel tube dish system in two, and by angle steel 131 and band steel 132 fixing formation; The stainless steel tube wall thickness of spiral coil cooling tube 12 is 3.5mm, and diameter is 57mm, and round shape kettle 1 enlarges or dwindles, and the stainless steel tube wall of the diameter of its spiral coil cooling tube 12 and spiral coil cooling tube 12 is by the corresponding expansion of equal proportion or dwindle; The height of spiral coil cooling tube 12 is 2500mm, and the number of turns of spiral coil cooling tube 12 is 25, and the middle groups spiral coil cooling tube is 9 circles, on, two groups respectively is 8 circles down, and round shape kettle 1 enlarges by equal proportion or dwindles, and spiral coil cooling tube 12 height and the number of turns enlarge by equal proportion or dwindle.
Wherein spiral coil cooling tube 12 comprises outer cooling coil 121 and interior cooling coil 122; The central diameter of outer cooling coil 121 is 1864mm; The central diameter of interior cooling coil 122 is 1650mm; Spacing between outer cooling coil 121 and the interior cooling coil 122 is 60mm, and the coil pipe interlayer between centers of outer cooling coil 121 and interior cooling coil 122 is respectively 100mm, and the gap of the coil pipe interlayer of outer cooling coil 121 and interior cooling coil 122 is respectively 43mm; Round shape kettle 1 enlarges or when dwindling, and coil pipe central diameter, internal and external disk tube spacing, coil pipe interlayer between centers and coil pipe interlamellar spacing are by the corresponding expansion of equal proportion or dwindle.
In this specific embodiment, the upper cover of kettle 1 also is provided with combination whipping appts installation opening, catalyzer inlet, carbonic acid gas export mouth, pressure monitoring, monitoring temperature and blasting piece device docking port (not shown).
Wherein, combination whipping appts installation opening is DN500, and the catalyzer inlet is DN80; The propylene oxide pump intake is DN80, and the carbonic acid gas intake is DN100, and the carbonic acid gas export mouth is DN150; Pressure monitoring and monitoring temperature docking port are DN25, and the blasting piece device docking port is DN150; Round shape kettle 1 enlarges or dwindles, and the DN value of each installing port is by the corresponding expansion of equal proportion or dwindle.
During use, carbonic acid gas is sent in the kettle 1 through inlet mouth, propylene oxide is sent in the kettle 1 through fluid inlet; Opening motor moves in the direction of the clock central rotating shaft 6; Spiral conveying blade 11 is carried the mixed reaction solution of carbonic acid gas and propylene oxide downwards by counterclockwise spiraling downwards, and the mixed reaction solution of carbonic acid gas and propylene oxide constantly mixes under the stirring of built-up type whipping appts; Wherein reaction solution is circulated with hoop is the main vertical stream of taking into account simultaneously to first whisking appliance 7; It serves as mainly to take into account hoop simultaneously and circulate with vertical stream that second whisking appliance 8 bag makes reaction solution, and the 3rd whisking appliance 9 circulates the reaction solution hoop, relies on the effect of gravity; The reaction solution product finally flows out 4 mouthfuls of polymkeric substance dischargings; Obtain reaction product, in this process, through spiral coil cooling tube 12 and cooling jacket 10 control reaction temperature in 65 ± 1 ℃ of scopes.

Claims (9)

1. synthesis reaction vessel that is applicable to carbon dioxide-epoxy propane copolymer preparation; Comprise the columnar kettle that has cooling jacket; Described kettle uprightly is provided with; The upper cover of described kettle is provided with opening for feed and inlet mouth, and the lower cover of described kettle is provided with the polymkeric substance discharge port, is vertically arranged with the central rotating shaft that is connected with outside motor in the described kettle; It is characterized in that: described central rotating shaft is provided with the built-up type whipping appts; Described built-up type whipping appts comprises first whisking appliance, second whisking appliance and the 3rd whisking appliance that fixedly installs successively along described central rotating shaft from top to bottom, and described first whisking appliance comprises two board-like blades of semi arch, and the acute angle angle that two board-like blades of described semi arch and described central rotating shaft form is respectively 45-90 °; Described second whisking appliance comprises the board-like blade of four two/half circular arc, and the acute angle angle that four described board-like blades of two/half circular arc and described central rotating shaft form is respectively 0-45 °; Described the 3rd whisking appliance is the plate and frame blade that is symmetricly set on described central rotating shaft both sides.
2. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1; It is characterized in that: described first whisking appliance also comprises first axle sleeve; The position, the center of circle of two board-like blades of described semi arch is separately fixed on described first axle sleeve, and the described first axle sleeve permanent sleeve is located on the described central rotating shaft.
3. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1; It is characterized in that: described second whisking appliance also comprises second axle sleeve; The position, the center of circle of four board-like blades of described two/half circular arc is separately fixed on described second axle sleeve; The described second axle sleeve permanent sleeve is located on the described central rotating shaft; Four board-like blades of described two/half circular arc are respectively the board-like blade of the one or two/half circular arc, the board-like blade of the two or two/half circular arc, the board-like blade of the three or two/half circular arc and the board-like blade of the four or two/half circular arc; Described board-like blade of the one or two/half circular arc and the board-like blade of described the two or two/half circular arc laterally arrange and oppositely are 180 °, and described board-like blade of the three or two/half circular arc and the board-like blade of described the four or two/half circular arc laterally arrange and oppositely be 180 °.
4. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1; It is characterized in that: described plate and frame blade is provided with and is used to reduce the flow downward through hole of resistance of reaction mass, and the both side ends of described plate and frame blade is along same direction bending certain angle.
5. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1; It is characterized in that: described central rotating shaft is provided with the spiral conveying blade that is used for carrying mixed reaction solution downwards; The direction of rotation of the spiral direction and the described central rotating shaft of the one-body molded and described spiral conveying blade of described spiral conveying blade and described central rotating shaft; The distance between the two ends up and down of described spiral conveying blade be described central rotating shaft length 1/8, the lower end of described spiral conveying blade is near described first whisking appliance.
6. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1; It is characterized in that: the inwall of described kettle is provided with spiral coil cooling tube, is used for fixing many slits combination baffle that supports described spiral coil cooling tube and the fixed support that supports described many slits combination baffle; Described many slits combination baffle comprises angle steel, band steel and baffle plate; Described fixed support is distributed on the lower end of the inwall of described kettle; Described angle steel, described band steel and described baffle plate vertically are weldingly fixed on the described fixed support; Described angle steel and described band steel laterally interfix through bolt, and the sidepiece end face of described angle steel is near described baffle plate, and described spiral coil cooling tube is fixed in described baffle plate and the described angle steel.
7. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 6 is characterized in that: described spiral coil cooling tube forms for three groups of stainless steel tube dish systems of triple feed inlet three outlets from bottom to top, and round shape kettle diameter is 2000mm; Height is 4000mm, and the stainless steel tube wall thickness is 3.5mm, and external diameter is 57mm; Described spiral coil cooling tube total height is 2500mm, and it is 25 circles that described spiral coil cooling tube always encloses ring, and the middle groups spiral coil cooling tube is 9 circles; On; Two groups respectively is 8 circles down, and described spiral coil cooling tube comprises outer cooling coil and interior cooling coil, and described outer cooling coil central diameter is 1864mm; The cooling coil central diameter is 1650mm in described; Spacing between described outer cooling coil and the described interior cooling coil is 60mm, and the coil pipe interlayer between centers of described outer cooling coil and described interior cooling coil is respectively 100mm, and the gap of the coil pipe interlayer of described outer cooling coil and described interior cooling coil is respectively 43mm; The round shape kettle enlarges or when dwindling, and the central diameter of spiral coil cooling tube, internal and external disk tube spacing, coil pipe interlayer between centers and coil pipe interlamellar spacing are by the corresponding expansion of equal proportion or dwindle.
8. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 6; It is characterized in that: the spacing between the end of two board-like blades of described semi arch and the described many slits combination baffle is respectively 1/25~1/20 of described kettle diameter; The end of four board-like blades of described two/half circular arc and the spacing between the combination baffle of described many slits are respectively 1/25~1/20 of described kettle diameter, and the distance between the bottom of the along the line and described kettle in the end of described plate and frame blade is 1/80 of a described kettle height.
9. a kind of synthesis reaction vessel that is applicable to the carbon dioxide-epoxy propane copolymer preparation according to claim 1, it is characterized in that: the upper cover of described kettle also is provided with combined impeller installation opening, catalyzer inlet, carbonic acid gas export mouth, pressure monitoring, monitoring temperature and blasting piece device docking port.
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