CN209791533U - Esterification reaction device - Google Patents
Esterification reaction device Download PDFInfo
- Publication number
- CN209791533U CN209791533U CN201920091463.1U CN201920091463U CN209791533U CN 209791533 U CN209791533 U CN 209791533U CN 201920091463 U CN201920091463 U CN 201920091463U CN 209791533 U CN209791533 U CN 209791533U
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- cylinder
- coil pipe
- baffles
- cylinder body
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- 238000005886 esterification reaction Methods 0.000 title claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 61
- 239000012071 phase Substances 0.000 claims description 22
- 230000032050 esterification Effects 0.000 claims description 15
- 239000007791 liquid phase Substances 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 22
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 40
- 239000000047 product Substances 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 229920005862 polyol Polymers 0.000 description 7
- 150000003077 polyols Chemical class 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 229920005906 polyester polyol Polymers 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 150000005846 sugar alcohols Polymers 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
the utility model discloses an esterification reaction device, which comprises a reactor barrel, wherein the barrel comprises a guide cylinder, a plurality of inner baffles, a plurality of outer baffles and a stirring device; the guide shell is positioned in the inner cavity of the cylinder body, the outer wall of the guide shell is rigidly connected with the inner wall of the cylinder body through a fixed support, the guide shell is hollow and cylindrical, and the length of the bottom of the guide shell, which is far away from the tangent line of the lower end socket of the cylinder body, is 30-40% of the inner diameter of the straight cylinder body; inner baffles are uniformly distributed on the inner wall of the guide shell in the circumferential direction, and the inner baffles are arranged along the length direction of the guide shell; the outer baffle is connected with the inside of the cylinder through a bracket, the outer baffle is uniformly distributed along the circumferential direction of the inner wall of the cylinder, the outer baffle is arranged along the length direction of the cylinder, and the bottom of the outer baffle is flush with the tangent line of the lower end enclosure of the cylinder; the utility model discloses structural arrangement is reasonable, the raw materials loss is little, product conversion rate and yield are high, reduces ton product raw materials consumption and energy consumption, accords with industry development relevant policy.
Description
Technical Field
The utility model belongs to polyester polyol production facility field, concretely relates to esterification reaction device.
Background
The polyester polyol is generally a hydroxyl-terminated polyester obtained by esterification and polycondensation of a polyol and an organic dicarboxylic acid (anhydride) or polymerization of a polyol and a lactone, and has an average molecular weight of 1000-4000 and a carboxyl group concentration of not more than 0.02 mol.kg. The polyester polyol is mainly used as a raw material for polyurethane synthesis, and compared with polyether polyol, the polyester polyol has better wear resistance, oil resistance and temperature resistance and high mechanical strength.
at present, polyester polyol is mostly produced by adopting an intermittent stirring kettle type reactor, and the paddle form and the internal accessory structure selected by the traditional kettle type reactor are not effectively optimized, so that the mixing uniformity of materials in the reactor is not high, the heat exchange efficiency is low, and a large amount of polyol raw materials are taken away by gas phase generated in the reaction, so that the problems of long reaction completion time, high energy consumption, low conversion rate and yield and the like are caused.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: an object of the utility model is to prior art not enough, provide an esterification reaction device, according to material physical characteristics and reaction characteristic in the reactor, optimize the adjustment to reactor inner structure, make material flash mixed even, improve heat transfer efficiency, shorten operating time, reduce export gaseous phase foam entrainment volume, and then improve esterification product conversion rate and yield.
The technical scheme is as follows: the esterification reaction device comprises a reactor barrel, wherein the barrel comprises a guide cylinder, a plurality of inner baffles, a plurality of outer baffles and a stirring device; the guide shell is positioned in the inner cavity of the cylinder body, the outer wall of the guide shell is rigidly connected with the inner wall of the cylinder body through a fixed support, the guide shell is hollow and cylindrical, and the length of the bottom of the guide shell, which is far away from the tangent line of the lower end socket of the cylinder body, is 30-40% of the inner diameter of the straight cylinder body; an internal heating device is arranged inside the guide cylinder; inner baffles are uniformly distributed on the inner wall of the guide shell in the circumferential direction, the inner baffles are arranged along the length direction of the guide shell, and the length of each inner baffle is not more than that of the guide shell; the outer baffle is connected with the inside of the cylinder through a bracket, the outer baffle is uniformly distributed along the circumferential direction of the inner wall of the cylinder, the outer baffle is arranged along the length direction of the cylinder, and the bottom of the outer baffle is flush with the tangent line of the lower end enclosure of the cylinder;
The stirring device comprises a stirring shaft, a scraper and a stirring paddle, wherein the stirring shaft, the scraper and the stirring paddle are positioned in the middle of the inner cavity of the cylinder body, the bottom end of the stirring shaft penetrates through the guide cylinder, is arranged at the bottom of the inner cavity of the cylinder body and is provided with the scraper, the stirring shaft is arranged at the middle lower part of the guide cylinder and is provided with 2-6 stirring paddle blades, the length of the stirring paddle blades is 85-95% of the inner diameter of the guide cylinder, the stirring paddle divides the inner baffle into an upper section and a lower section, the distance between the upper section and the lower section is 5-20% of the inner diameter of;
The top of the cylinder body is provided with a feed pipe, the feed pipe is inserted into the guide cylinder, the bottom of the feed pipe is positioned above the stirring paddle, the distance between the bottom of the feed pipe and the stirring paddle is more than 200mm, the top of the cylinder body is provided with a gas phase outlet, the gas phase outlet is connected with a gas phase outlet pipe, and a regular packing section is arranged inside the cylinder body of the gas phase outlet; a liquid phase backflow port is formed in the barrel below the regular packing section, and a liquid phase backflow pipe is mounted on the liquid phase backflow port;
an esterified product outlet is formed in the bottom of the cylinder body and is positioned below the scraper plate, a gas inlet is formed in the bottom of the cylinder body, a gas inlet pipe is mounted outside the gas inlet, a gas distribution device is arranged above the inside of the gas inlet and is positioned below the guide cylinder, and the gas distribution device is horizontally arranged on the sealing end side of the bottom of the cylinder body through a support; an outer coil is arranged on the outer wall of the cylinder body.
Preferably, inside heating rising temperature device is interior coil pipe, interior coil pipe carries out concentric hoop along the hoop clearance between interior baffle and the (mixing) shaft and arranges, the top of interior coil pipe is stretched out the barrel outer wall and is provided with interior coil pipe steam inlet, the bottom of interior coil pipe is stretched out the barrel outer wall and is provided with interior coil pipe steam condensate outlet, and coil pipe steam condensate outlet discharge interior coil pipe in coil pipe circulation reentrant is followed in interior coil pipe steam inlet to steam, the bottom of interior coil pipe is 200mm with the interval of stirring rake.
preferably, the top of outer coil pipe is located the below of liquid phase backward flow mouth, the outer coil pipe top is provided with outer coil pipe steam inlet, and its bottom is provided with outer coil pipe steam condensate outlet, and steam gets into interior coil pipe circulation reentrant outer coil pipe steam condensate outlet discharge outer coil pipe from outer coil pipe steam inlet.
Preferably, the inner diameter of the guide shell is 60-70% of the inner diameter of the straight shell of the shell, and the height of the guide shell is the same as the inner diameter of the shell; the number of the inner baffles is 3-6, and the distance between the upper section and the lower section of the inner baffles is preferably 10% of the inner diameter of the guide shell.
Preferably, the number of the outer baffles is 3-6, the length of the outer baffles is 80% of the length of the straight cylinder body, and the width of the outer baffles is 5% -15% of the inner diameter of the straight cylinder body.
preferably, the number of the inner baffles is the same as that of the outer baffles, the inner baffles and the outer baffles are uniformly arranged in the circumferential direction without overlapping, and the included angle between every two adjacent inner baffles and every two adjacent outer baffles is 360 degrees/(the number of the inner baffles and the number of the outer baffles).
Preferably, the stirring paddle adopts an axial-radial flow combined type stirrer, the number of the stirring paddle blades is preferably 3, and the diameter of each stirring paddle blade is 85-95% of the inner diameter of the guide shell.
Preferably, the filler in the regular filler section is stainless steel wire mesh corrugated filler or stainless steel plate corrugated filler, and the height of the regular filler section is 50-300 mm.
Preferably, the gas distribution device is connected with the radial pipe through a circular ring pipe, and the maximum diameter of the circular ring pipe is 75% of the inner diameter of the cylinder body.
preferably, a motor is installed on the top of the stirring shaft.
the utility model discloses a theory of operation:
In the utility model, organic polycarboxylic acid and polyhydric alcohol are preheated to a certain temperature and mixed to form a mixture, the mixture enters the guide cylinder from the feeding pipe, and under the combined action of the stirring device, the inner baffle and the outer baffle, the mixture flows upwards from the bottom of the central area of the barrel body of the reactor to the inner wall surface of the barrel body, and is heated by the inner coil pipe and the outer coil pipe to continuously rise to a set temperature; nitrogen enters the gas distribution device through the gas inlet pipe, enters the reactor barrel through the secondary distribution of the gas distribution device, takes away water, partial dihydric alcohol and other byproducts generated in the reaction from the gas-phase outlet pipe arranged at the top of the barrel in time, gas-phase materials extracted from the gas-phase outlet pipe return to the reactor barrel through the liquid-phase return pipe after being subjected to the subsequent rectification process to recover the polyhydric alcohol, and esterification products after the reaction are extracted through the esterification product outlet at the bottom of the barrel.
The utility model reasonably sets the structure, position and quantity of the guide cylinder, the stirring paddle, the inner baffle and the outer baffle, strengthens the heat and mass transfer process, reduces the time and energy consumption for the material in the reactor cylinder to be uniformly mixed and reach the reaction temperature, sets the regular packing section at the top, and reduces the loss rate of the polyol raw material caused by entrainment of the mist; through the gas distribution device that barrel bottom set up, impel nitrogen gas evenly distributed in the reactor barrel, in time take away water and other accessory substance that the reaction produced, impel the reaction to go on to the positive direction, improve the conversion of esterification product.
Has the advantages that: (1) the utility model reasonably arranges the structure, position and quantity of the draft tube, the stirring device, the inner baffle and the outer baffle in the reactor cylinder body, realizes the circular flow mode that the mixed material from the center of the draft tube to the bottom of the reactor cylinder body and then upwards reaches the upper part of the reactor along the inner wall of the reactor cylinder body, enters the upper part of the draft tube and then reaches the lower part of the draft tube, shortens the uniform mixing time of the mixed material and simultaneously improves the mass and heat transfer efficiency;
(2) The utility model has the advantages that the annular inner coil pipe is arranged inside the guide cylinder, the outer coil pipe is arranged on the outer surface of the cylinder body, the heat transfer intensity of the mixed material in the reactor cylinder body is improved through the combined action of the inner coil pipe and the outer coil pipe, the temperature rise time is shortened, and the production capacity is improved;
(3) the utility model arranges the regular packing section at the gas phase outlet at the top of the reactor cylinder, and the regular packing section can reduce entrainment of gas phase produced, thereby reducing the loss of polyol;
(4) The utility model arranges the gas distribution device at the bottom of the reactor cylinder, and the gas distribution device disperses the nitrogen introduced from the gas inlet pipe at the bottom of the cylinder, so that the dispersed nitrogen can take away the water and other byproducts generated by the reaction in the cylinder in time, the reaction is promoted to be carried out in the positive direction, and the conversion rate and the yield of the esterified product are improved; the utility model discloses structural arrangement is reasonable, the raw materials loss is little, product conversion rate and yield are high, reduces ton product raw materials consumption and energy consumption, accords with industry development relevant policy.
drawings
FIG. 1 is a schematic structural diagram of an esterification apparatus according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
Fig. 4 is a schematic structural view of the outer baffle and the inner baffle of the present invention.
The device comprises a feeding pipe 1, a motor 2, a gas phase outlet pipe 3, a structured packing section 4, a liquid phase return pipe 5, an outer coil pipe 6, an outer coil pipe 7, an outer coil pipe steam inlet 8, a guide cylinder 9, an outer baffle plate 10, a stirring paddle 11, a stirring shaft 12, a gas distribution device 13, an outer coil pipe steam condensate outlet 14, an esterified product outlet 14, a gas inlet pipe 15, an inner coil pipe steam condensate outlet 16, an inner coil pipe 17, an inner baffle plate 18, an inner coil pipe steam inlet 19 and a barrel 20.
Detailed Description
the technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example (b): an esterification reaction device comprises a reactor barrel 20, the diameter of the barrel 20 is 2800mm, the length of a straight barrel section of the barrel 20 is 3500mm, and the barrel 20 comprises a guide shell 8, 4 inner baffles 18, 4 outer baffles 9 and a stirring device;
The inner diameter of the guide cylinder 8 is 1900mm, the height of the guide cylinder 8 is 1300mm, the guide cylinder 8 is positioned in the inner cavity of the cylinder body 20, the outer wall of the guide cylinder 8 is rigidly connected with the inner wall of the cylinder body 20 through a fixed support, the guide cylinder 8 is hollow and cylindrical, and the distance between the bottom of the guide cylinder 8 and the tangent line of the lower end enclosure of the cylinder body 20 is 700 mm; an internal heating device is arranged inside the guide cylinder 8; the internal heating and warming device is an internal coil pipe 7, the internal coil pipe 7 is concentrically and annularly arranged along an annular gap between an internal baffle 18 and a stirring shaft 11, the top of the internal coil pipe 7 extends out of the outer wall of a barrel 20 and is provided with an internal coil pipe steam inlet 19, the bottom of the internal coil pipe 7 extends out of the outer wall of the barrel 20 and is provided with an internal coil pipe steam condensate outlet 16, steam enters the internal coil pipe 7 from the internal coil pipe steam inlet 19 to circulate and then enters the internal coil pipe steam condensate outlet 16 to be discharged out of the internal coil pipe 7, and the interval between the bottom of the internal coil pipe 7 and the stirring paddle 10;
as can be seen from fig. 2 and fig. 4, the inner baffles 18 are uniformly arranged in the circumferential direction of the inner wall of the draft tube 8, the long sides of the inner baffles 18 are arranged along the length direction of the draft tube 8, the inner baffles 18 are perpendicular to the tangent plane intersecting with the draft tube, the length of the inner baffles 18 is not more than the length of the draft tube 8, the total length of the inner baffles 18 is 920mm, and the width of the inner baffles is 200 mm; the length of the outer baffle 9 is 2500mm, and the width is 300 mm; the outer baffle 9 is connected with the inside of the cylinder 20 through a support, the outer baffle 9 is uniformly distributed along the circumferential direction of the inner wall of the cylinder 20, the long edge of the outer baffle 9 is arranged along the length direction of the cylinder 20, the outer baffle 9 is vertical to a tangent plane intersected with the inner wall of the cylinder 20, and the bottom of the outer baffle 9 is flush with the tangent line of the lower end enclosure of the cylinder 20; the inner diameter of the guide shell 8 is 60-70% of the straight inner diameter of the shell 20, and the height of the guide shell is the same as the inner diameter of the shell 20; the distance between the upper section and the lower section of the inner baffle 18 is preferably 10% of the inner diameter of the guide shell 8; the length of the outer baffle 9 is 80 percent of the length of the straight cylinder of the cylinder body 20, and the width of the outer baffle is 5 to 15 percent of the inner diameter of the straight cylinder of the cylinder body 20; the inner baffles 18 and the outer baffles 9 are uniformly arranged in the circumferential direction without overlapping, and the included angle between every two adjacent inner baffles and every two adjacent outer baffles 9 is 45 degrees;
The stirring device comprises a stirring shaft 11, a scraper and a stirring paddle 10 which are positioned in the middle of an inner cavity of the cylinder body 20, the bottom end of the stirring shaft 11 penetrates through the guide cylinder 8 and is arranged at the bottom of the inner cavity of the cylinder body 20 and is provided with the scraper, the stirring shaft 11 is provided with the stirring paddle 10 at the middle lower part of the guide cylinder 8, the number of the blades of the stirring paddle 10 is 3, the stirring paddle 10 adopts a shaft-radial-flow composite stirrer, the diameter of the blades of the stirring paddle 10 is 1800mm, the inner baffle 18 formed by dividing the stirring paddle 10 into an upper section and a lower section, the distance between the upper section and the lower section is 5-20% of the inner diameter of the guide cylinder 8, the length of the upper section is 720mm, the length of the lower section is 200;
The top of the cylinder body 20 is provided with a feeding pipe 1, the feeding pipe 1 is inserted into an annular area of the guide cylinder 8 and the stirring device, the bottom of the feeding pipe 1 is positioned above the stirring paddle 10, the distance between the bottom of the feeding pipe 1 and the stirring paddle 10 is 200mm, the top of the cylinder body 20 is provided with a gas phase outlet, the gas phase outlet is connected with a gas phase outlet pipe 3, a regular packing section 4 is arranged inside the cylinder body 20 of the gas phase outlet, and the regular packing section 4 is stainless steel wire mesh corrugated packing or stainless steel plate corrugated packing; the height of the structured packing section 4 is 200 mm; a liquid phase return port is arranged on the barrel 20 below the regular packing section 4, and a liquid phase return pipe 5 is arranged on the liquid phase return port;
The bottom of the cylinder body 20 is provided with an esterified product outlet 14, the esterified product outlet 14 is positioned below the scraper, the bottom of the cylinder body 20 is provided with a gas inlet, the outside of the gas inlet is provided with a gas inlet pipe 15, the inside of the gas inlet is provided with a gas distribution device 12, according to the attached drawing 3, the gas distribution device 12 is a circular pipe connected with a radial pipe, the maximum diameter of the circular pipe is 2000mm, the gas distribution device 12 is positioned below the guide cylinder 8, and the gas distribution device 12 is horizontally arranged on the bottom end sealing side of the cylinder body 20 through a support; be provided with outer coil pipe 6 on the outer wall of barrel 20, the top of outer coil pipe 6 is located the below of liquid phase backward flow mouth, and 6 tops of outer coil pipe are provided with outer coil pipe steam inlet 7, and its bottom is provided with outer coil pipe steam condensate export 13, and steam gets into 7 circulation reentrant outer coil pipe steam condensate exports 13 discharge outer coil pipe 7 of inner coil pipe from outer coil pipe steam inlet 7.
The utility model discloses a theory of operation:
in the utility model, organic polycarboxylic acid and polyhydric alcohol are preheated to a certain temperature and mixed to form a mixture, the mixture enters the guide cylinder 8 from the feeding pipe 1, and under the combined action of the stirring device, the inner baffle 18 and the outer baffle 9, the mixture flows upwards from the bottom of the central area of the reactor cylinder 20 to the inner wall surface of the cylinder 20 and is heated by the inner coil pipe 7 and the outer coil pipe 6 to be continuously heated to a set temperature; nitrogen enters the gas distribution device 12 through the gas inlet pipe 15, enters the reactor barrel 20 through the secondary distribution of the gas distribution device 12, water, partial dihydric alcohol and other byproducts generated in the reaction are taken away from the gas-phase outlet pipe 3 arranged at the top of the barrel 20 in time, gas-phase materials extracted from the gas-phase outlet pipe 3 are returned to the reactor barrel 20 through the liquid-phase return pipe 5 after polyhydric alcohol is recovered through a subsequent rectification process, and esterified products after the reaction are extracted through the esterified product outlet 14 at the bottom of the barrel 20.
The utility model reasonably sets the structure, position and quantity of the draft tube 8, the stirring paddle 10, the inner baffle 18 and the outer baffle 9, strengthens the heat and mass transfer process, reduces the time and energy consumption for the materials in the reactor barrel 20 to be uniformly mixed and reach the reaction temperature, sets the top regular packing section 4, and reduces the loss rate of the polyol raw material caused by entrainment of the mist; through the gas distribution device 12 arranged at the bottom of the cylinder 20, nitrogen is enabled to be uniformly distributed in the reactor cylinder 20, water and other byproducts generated by the reaction are taken away in time, the reaction is enabled to be carried out in the positive direction, and the conversion rate of the esterified product is improved.
As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides an esterification reaction device, includes reactor barrel, its characterized in that: the cylinder body comprises a guide cylinder, a plurality of inner baffles, a plurality of outer baffles and a stirring device; the guide shell is positioned in the inner cavity of the cylinder body, the outer wall of the guide shell is rigidly connected with the inner wall of the cylinder body through a fixed support, the guide shell is hollow and cylindrical, and the length of the bottom of the guide shell, which is far away from the tangent line of the lower end socket of the cylinder body, is 30-40% of the inner diameter of the straight cylinder body; an internal heating device is arranged inside the guide cylinder; inner baffles are uniformly distributed on the inner wall of the guide shell in the circumferential direction, the inner baffles are arranged along the length direction of the guide shell, and the length of each inner baffle is not more than that of the guide shell; the outer baffle is connected with the inside of the cylinder through a bracket, the outer baffle is uniformly distributed along the circumferential direction of the inner wall of the cylinder, the outer baffle is arranged along the length direction of the cylinder, and the bottom of the outer baffle is flush with the tangent line of the lower end enclosure of the cylinder;
the stirring device comprises a stirring shaft, a scraper and a stirring paddle, wherein the stirring shaft, the scraper and the stirring paddle are positioned in the middle of the inner cavity of the cylinder body, the bottom end of the stirring shaft penetrates through the guide cylinder, is arranged at the bottom of the inner cavity of the cylinder body and is provided with the scraper, the stirring shaft is arranged at the middle lower part of the guide cylinder and is provided with 2-6 stirring paddle blades, the length of the stirring paddle blades is 85-95% of the inner diameter of the guide cylinder, the stirring paddle divides the inner baffle into an upper section and a lower section, the distance between the upper section and the lower section is 5-20% of the inner diameter of;
the top of the cylinder body is provided with a feed pipe, the feed pipe is inserted into the guide cylinder, the bottom of the feed pipe is positioned above the stirring paddle, the distance between the bottom of the feed pipe and the stirring paddle is more than 200mm, the top of the cylinder body is provided with a gas phase outlet, the gas phase outlet is connected with a gas phase outlet pipe, and a regular packing section is arranged inside the cylinder body of the gas phase outlet; a liquid phase backflow port is formed in the barrel below the regular packing section, and a liquid phase backflow pipe is mounted on the liquid phase backflow port;
the bottom of the cylinder is provided with an esterified product outlet which is positioned below the scraper, the bottom of the cylinder is provided with a gas inlet, a gas distribution device is arranged above the gas inlet and positioned below the guide cylinder, and the gas distribution device is horizontally arranged on the sealing end side of the bottom of the cylinder through a support; an outer coil is arranged on the outer wall of the cylinder body.
2. an esterification apparatus according to claim 1, wherein: inside heating rising temperature device is interior coil pipe, interior coil pipe carries out concentric hoop along hoop clearance between interior baffle and the (mixing) shaft and arranges, the top of interior coil pipe is stretched out the barrel outer wall and is provided with interior coil pipe steam inlet, the bottom of interior coil pipe is stretched out the barrel outer wall and is provided with interior coil pipe steam condensate outlet, and coil pipe steam condensate outlet discharge interior coil pipe in coil pipe circulation reentrant is followed in interior coil pipe steam inlet to steam, the bottom of interior coil pipe is 200mm with the interval of stirring rake.
3. an esterification apparatus according to claim 1, wherein: the outer coil pipe carries out concentric ring along barrel outer wall circumferential clearance and arranges, the top of outer coil pipe is located the below of liquid phase backward flow mouth, the outer coil pipe top is provided with outer coil pipe steam inlet, and its bottom is provided with outer coil pipe steam condensate outlet, and steam gets into inner coil pipe circulation reentrant outer coil pipe steam condensate outlet discharge outer coil pipe from outer coil pipe steam inlet.
4. An esterification apparatus according to claim 1, wherein: the inner diameter of the guide cylinder is 60-70% of the inner diameter of the straight cylinder of the cylinder body, and the height of the guide cylinder is the same as the inner diameter of the cylinder body; the number of the inner baffles is 3-6, and the distance between the upper section and the lower section of the inner baffles is 10% of the inner diameter of the guide shell.
5. An esterification apparatus according to claim 1, wherein: the number of the outer baffles is 3-6, the length of the outer baffles is 80% of the length of the straight cylinder body, and the width of the outer baffles is 5% -15% of the inner diameter of the straight cylinder body.
6. An esterification apparatus according to claim 4 or 5, wherein: the number of the inner baffles is the same as that of the outer baffles, the inner baffles and the outer baffles are uniformly arranged in the circumferential direction without overlapping, and the included angle between the inner baffles and the outer baffles in every two adjacent blocks is 360 degrees/(the number of the inner baffles plus the number of the outer baffles).
7. An esterification apparatus according to claim 1, wherein: the stirring paddle adopts an axial-radial flow combined type stirrer, the number of blades of the stirring paddle is 3, and the diameter of each blade of the stirring paddle is 85-95% of the inner diameter of the guide cylinder.
8. An esterification apparatus according to claim 1, wherein: the filler in the regular filler section is stainless steel wire mesh corrugated filler or stainless steel plate corrugated filler, and the height of the regular filler section is 50-300 mm.
9. an esterification apparatus according to claim 1, wherein: the gas distribution device is connected with the radial pipe through a circular ring pipe, and the maximum diameter of the circular ring pipe is 75% of the inner diameter of the cylinder body.
10. An esterification apparatus according to claim 1, wherein: and a motor is arranged at the top of the stirring shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091463.1U CN209791533U (en) | 2019-01-21 | 2019-01-21 | Esterification reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920091463.1U CN209791533U (en) | 2019-01-21 | 2019-01-21 | Esterification reaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209791533U true CN209791533U (en) | 2019-12-17 |
Family
ID=68820408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920091463.1U Withdrawn - After Issue CN209791533U (en) | 2019-01-21 | 2019-01-21 | Esterification reaction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209791533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621873A (en) * | 2019-01-21 | 2019-04-16 | 中建安装集团有限公司 | A kind of esterification device |
-
2019
- 2019-01-21 CN CN201920091463.1U patent/CN209791533U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109621873A (en) * | 2019-01-21 | 2019-04-16 | 中建安装集团有限公司 | A kind of esterification device |
| CN109621873B (en) * | 2019-01-21 | 2024-04-16 | 中建安装集团有限公司 | Esterification reaction device |
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