CN111001177B - Device for preventing polymerization of reboiler gas phase dead zone in styrene rectification process - Google Patents
Device for preventing polymerization of reboiler gas phase dead zone in styrene rectification process Download PDFInfo
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- CN111001177B CN111001177B CN201911303460.0A CN201911303460A CN111001177B CN 111001177 B CN111001177 B CN 111001177B CN 201911303460 A CN201911303460 A CN 201911303460A CN 111001177 B CN111001177 B CN 111001177B
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- reboiler
- gas phase
- spray
- dead zone
- styrene
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- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000005507 spraying Methods 0.000 claims abstract description 21
- 238000000889 atomisation Methods 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 239000011344 liquid material Substances 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 229920000642 polymer Polymers 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
- B01D3/322—Reboiler specifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention provides a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process. The device for preventing polymerization of the gas phase dead zone of the reboiler in the styrene rectification process comprises: a reboiler; the device comprises a first crude tower top gas phase and a first crude tower top gas phase condensate, wherein the output end of the first crude tower top gas phase is arranged at the input end of the reboiler. The device for preventing the reboiler gas phase dead zone from polymerizing in the styrene rectification process provided by the invention is provided with the spraying branch pipes which are uniformly distributed at 45 degrees and uniformly distributed on the branch pipes by utilizing the atomization spraying device to spray the spraying liquid to the side of the end socket, so that the spraying atomized liquid can uniformly cover the gas phase space in the whole end socket, the atomized liquid is accumulated on the inner side of the end socket, and a layer of flowing liquid film is formed on the inner wall of the end socket. The device can prevent the adverse effect of the polymer generated by the self-polymerization of the styrene which is retained after the condensation of the styrene gas-phase material on the inner wall of the end socket on the operation of the reboiler.
Description
Technical Field
The invention relates to the technical field of reboilers, in particular to a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process.
Background
The technology for preparing styrene by ethylbenzene negative pressure adiabatic dehydrogenation has the main technical index reaching the leading level in the domestic styrene production industry at present, and adopts a double-tower rectification process of thermally coupling a first crude tower and a second crude tower for ethylbenzene and styrene separation in a rectification section, and utilizes the tower top gas phase at the tower top of the first crude tower of 98 ℃ as a heat source of a reboiler of the second crude tower, returns to a reflux tank of the first crude tower after heat exchange, and partially vaporizes a tower bottom high-purity crude styrene material of the second crude tower after absorbing heat in the reboiler, and returns to a tower bottom in gas-liquid two phases.
The negative pressure double-tower rectification is adopted to reduce the temperature of the kettle liquid material, so that the high-temperature polymerization phenomenon of styrene can be prevented to a certain extent, but the temperature rise of the heated material of a reboiler is lower, only about 1 ℃, the common reboiler structure cannot meet the heat exchange working condition, so that the reboiler structure designed by the principle of a vertical falling film evaporator is widely used in China, the heated material enters from the upper part of a tube pass and returns to a tower kettle from the bottom, the structure strengthens the heat transfer effect, but the space at the upper part of a tube pass feed inlet has a gas-phase retention dead zone, the temperature and the retention time are main reasons for the self-polymerization reaction of the styrene, the retention time of the styrene gas phase accumulated in the space at the upper part of the tube pass feed inlet is greatly increased because of no circulation, the polymerization wall hanging phenomenon occurs after the polymerization reaction of the styrene is an exothermic reaction, the polymerization phenomenon of the styrene is induced to be aggravated, the reboiler is prevented from being operated when the polymer on the inner wall of the end enclosure is more and more, the reboiler is prevented from being stopped periodically, and the process and equipment can be stably operated for a long period, and the immeasurable economic loss is brought to the process and equipment.
Therefore, it is necessary to provide a device for preventing polymerization of the gas phase dead zone of the reboiler in the rectification process of styrene to solve the technical problems.
Disclosure of Invention
The invention provides a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process, which solves the problem of polymerization of the gas phase dead zone of a tube side of the reboiler.
In order to solve the technical problems, the device for preventing polymerization of the gas phase dead zone of the reboiler in the styrene rectification process provided by the invention comprises: a reboiler; the device comprises a first crude tower top gas phase and a first crude tower top gas phase condensate, wherein the output end of the first crude tower top gas phase is arranged at the input end of a reboiler, and the input end of the first crude tower top gas phase condensate is arranged at the output end of the reboiler; the output end of the second crude tower kettle liquid material is arranged at the input end of the top of the reboiler through a forced circulation pump; the second crude tower kettle liquid is discharged, and the input end of the second crude tower kettle liquid discharge is arranged at the output end of the bottom of the reboiler; the spray pipeline is arranged between the output end of the forced circulation pump and the top of the reboiler; the flow regulating valve is arranged on the spray pipeline; the flowmeter is arranged between the regulating valve and the spray pipeline; the external flange interface and the internal flange interface are arranged on the spray pipeline and are respectively positioned at the top of the reboiler and the top of the inner wall; and the atomizing spray device is arranged at the output end of the spray pipeline.
Preferably, the atomizing spray device comprises a spray branch pipe, and a plurality of atomizing nozzles are arranged on the spray branch pipe.
Preferably, the input end of the spray bracket is provided with a connecting flange, and the connecting flange is matched with the inscribed flange interface at the top of the inner wall of the reboiler.
Preferably, the spraying branch pipes are inclined downwards by 45 degrees, eight spraying branch pipes are arranged in total, and two atomizing nozzles are arranged on each spraying branch pipe.
Preferably, the method further comprises: the top of the mounting frame is fixed at the bottom of the output end of the spray pipeline; the water diversion pipe rotates on one side of the mounting frame through the first rotating block; the adjusting component is arranged on the spray pipeline; the limiting disc is fixed on the spray pipeline and provided with a plurality of limiting holes; and the positioning bolt is arranged between the adjusting assembly and the spray pipeline.
Preferably, the adjusting assembly comprises an adjusting ring, and the inner surface of the adjusting ring is provided with an inner threaded surface.
Preferably, the surface of the spray pipeline is provided with an external thread surface, and the external thread surface of the spray pipeline is in threaded connection with the internal thread surface of the adjusting ring.
Preferably, the bottom of adjusting ring rotates and is connected with the lifter, one side of lifter is connected with the transfer line through the rotation of second pivoted piece.
Preferably, the bottom of the transmission rod penetrates through the inside of the limiting hole and extends to the bottom of the limiting disc, and the bottom of the transmission rod is rotationally connected with the top of the water diversion pipe through a third rotating block.
Preferably, the plurality of transmission holes are provided with eight, and the eight transmission holes are symmetrically distributed on the limiting disc.
Compared with the related art, the device for preventing the polymerization of the gas phase dead zone of the reboiler in the styrene rectification process has the following beneficial effects:
the invention provides a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process, which is characterized in that a spray liquid is shunted from a second crude tower kettle liquid material and is led into a top end enclosure of the reboiler along a spray pipeline, the spray liquid is atomized and sprayed out uniformly to the end enclosure side by utilizing an atomization spray device, the spray branch pipes distributed for one circle at 45 degrees and atomization nozzles uniformly distributed on the branch pipes can uniformly cover the gas phase space in the whole end enclosure, the atomized liquid is accumulated on the inner side of the end enclosure, and a layer of flowing liquid film is formed on the inner wall of the end enclosure.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process;
FIG. 2 is a schematic view of the portion of the atomizing spray apparatus shown in FIG. 1;
fig. 3 is a schematic structural diagram of a second embodiment of a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process.
Reference numerals in the drawings: 1. reboiler, 2, first crude tower top gas phase, 3, first crude tower top gas phase condensate, 4, second crude tower cauldron liquid material, 5, second crude tower cauldron liquid ejection of compact, 6, forced circulation pump, 7, spray line, 71, constant head tank, 8, flow control valve, 9, flowmeter, 10, external flange interface, 11, inscribed flange interface, 12, atomizing spray set, 121, spray branch pipe, 122, atomizing nozzle, 123, flange, 13, mounting bracket, 14, shunt tubes, 15, adjusting component, 151, adjusting ring, 152, lifting block, 153, transfer line, 16, limiting disc, 161, limiting hole, 17, positioning bolt.
Detailed Description
The invention will be further described with reference to the drawings and embodiments.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a schematic structural diagram of a first embodiment of a device for preventing polymerization of a gas phase dead zone of a reboiler in a styrene rectification process according to the present invention; fig. 2 is a schematic view of the portion of the atomizing spray apparatus shown in fig. 1. The device for preventing the polymerization of the gas phase dead zone of the reboiler in the styrene rectification process comprises: a reboiler 1; the device comprises a first crude tower top gas phase 2 and a first crude tower top gas phase condensate 3, wherein the output end of the first crude tower top gas phase 2 is arranged at the input end of a reboiler 1, and the input end of the first crude tower top gas phase condensate 3 is arranged at the output end of the reboiler 1; the output end of the second crude tower kettle liquid material 4 is arranged at the input end of the top of the reboiler 1 through a forced circulation pump 6; the second crude tower kettle liquid discharge 5, wherein the input end of the second crude tower kettle liquid discharge 5 is arranged at the output end of the bottom of the reboiler 1; a spray line 7, wherein the spray line 7 is arranged between the output end of the forced circulation pump 6 and the top of the reboiler 1; a flow rate regulating valve 8, wherein the flow rate regulating valve 8 is arranged on the spray pipeline 7; a flow meter 9, the flow meter 9 being arranged between the regulating valve 8 and the shower line 7; an external flange interface 10 and an internal flange interface 11, wherein the external flange interface 10 and the internal flange interface 11 are arranged on the spray pipeline 7 and are respectively positioned at the top of the reboiler 1 and the top of the inner wall; and the atomizing spray device 12 is arranged at the output end of the spray pipeline 7.
The atomizing spray device 12 comprises a spray branch pipe 121, and a plurality of atomizing nozzles 122 are arranged on the spray branch pipe 121.
The input end of the spray branch pipe 121 is provided with a connecting flange 123, and the connecting flange 123 is matched with the inscribed flange interface 11 at the top of the inner wall of the reboiler 1.
The shower branch pipes 121 are inclined downward by 45 °, and eight shower branch pipes 121 are provided in total.
The second crude tower kettle liquid material 4 is branched into a spray liquid and is led into the top end enclosure of the reboiler 1 along the spray pipeline 7, the spray liquid is atomized and uniformly sprayed out to the end enclosure side by utilizing the atomization spray device 12, the spray branch pipe 121 and the atomization nozzles 122 uniformly distributed on the branch pipe are distributed for a circle by means of 45 degrees, the spray atomized liquid can uniformly cover the gas phase space inside the whole end enclosure, the atomized liquid is accumulated on the inner side of the end enclosure, a layer of flowing liquid film is formed on the inner wall of the end enclosure, and the device can prevent the adverse effect of the polymer generated by the self-polymerization of styrene after the condensation of the styrene gas phase material on the inner wall of the end enclosure on the operation of the reboiler.
The spray pipeline 7 is led to the top end enclosure of the reboiler 1 from the outlet of the forced circulation pump 6 and the front of the regulating valve on the pipeline of the second crude tower kettle liquid material 4 on the reboiler 1, the pipeline auxiliary facilities comprise the flow regulating valve 8 and the flowmeter 9, the top end enclosure of the reboiler 1 is provided with an external flange interface 10 and an internal flange interface 11, and the atomization spray device 12 comprises a spray branch pipe 121, an atomization nozzle 122 and a connecting flange 123 for assembling the spray branch pipe 121.
The pipeline interface is arranged at the outlet of the forced circulation pump 6 and the regulating valve so as to ensure the spray hydraulic pressure; the flow regulating valve 8 and the flowmeter 9 are arranged to ensure the spraying amount of the spraying liquid in the upper space of the tube side of the reboiler 1; the spray branch pipes 121 in the end enclosure of the reboiler 1 are uniformly distributed for one circle and a plurality of atomizing nozzles 122 are arranged to ensure the spray atomization effect in the gas phase dead zone.
The first crude tower and the second crude tower of the rectifying part of the 26 ten thousand tons of styrene device in a certain factory adopt a double-tower rectifying process, the bottom liquid of the second crude tower can reach more than 550 tons per hour, the concentration of styrene is more than 90 percent, a large amount of polymers are accumulated in the end socket of a reboiler for continuous production of about 8 to 10 months, the reboiler equipment makes an annual overhaul plan, the gas-phase dead zone polymerization prevention device of the reboiler is refitted, the spray liquid is introduced into 6 uniformly distributed DN2O spray branch pipes by utilizing a spray pipeline of DN50, 2 atomizing nozzles are arranged on each spray branch pipe, the total of 12 atomizing nozzles is solved, the problem of polymerization of the gas-phase dead zone styrene of the reboiler is solved, and the startup and shutdown cost brought by overhaul of the reboiler and the period of stable operation of the device can be saved each year.
The working principle of the device for preventing the polymerization of the gas phase dead zone of the reboiler in the styrene rectification process provided by the invention is as follows:
the spray pipeline 7 is led to the top end enclosure of the reboiler 1 from the outlet of the forced circulation pump 6 and the front of the regulating valve on the pipeline of the second crude tower kettle liquid material 4 on the reboiler 1, the pipeline auxiliary facilities comprise a flow regulating valve 8 and a flowmeter 9, the top end enclosure of the reboiler 1 is provided with an external flange interface 10 and an internal flange interface 11, and the atomization spray device 12 comprises a spray branch pipe 121, an atomization nozzle 122 and a connecting flange 123 for assembling the spray branch pipe 121;
the pipeline interface is arranged at the outlet of the forced circulation pump 6 and the regulating valve so as to ensure the spray hydraulic pressure; the flow regulating valve 8 and the flowmeter 9 are arranged to ensure the spraying amount of the spraying liquid in the upper space of the tube side of the reboiler 1; the spray branch pipes 121 in the end enclosure of the reboiler 1 are uniformly distributed for one circle and a plurality of atomizing nozzles 122 are arranged to ensure the spray atomization effect in the gas phase dead zone.
Compared with the related art, the device for preventing the polymerization of the gas phase dead zone of the reboiler in the styrene rectification process has the following beneficial effects:
the second crude tower kettle liquid material 4 is branched into a spray liquid and is led into the top end enclosure of the reboiler 1 along the spray pipeline 7, the spray liquid is atomized and uniformly sprayed out to the end enclosure side by utilizing the atomization spray device 12, the spray branch pipe 121 and the atomization nozzles 122 uniformly distributed on the branch pipe are distributed for a circle by means of 45 degrees, the spray atomized liquid can uniformly cover the gas phase space inside the whole end enclosure, the atomized liquid is accumulated on the inner side of the end enclosure, a layer of flowing liquid film is formed on the inner wall of the end enclosure, and the device can prevent the adverse effect of the polymer generated by the self-polymerization of styrene after the condensation of the styrene gas phase material on the inner wall of the end enclosure on the operation of the reboiler.
Second embodiment:
based on the device for preventing polymerization of the gas-phase dead zone of the reboiler in the rectification process of styrene provided in the first embodiment of the present application, another device for preventing polymerization of the gas-phase dead zone of the reboiler in the rectification process of styrene is provided in the second embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment, and implementation of the second embodiment does not affect the implementation of the first embodiment alone.
Specifically, the structural schematic diagram of the second embodiment of the apparatus for preventing polymerization in a gas phase dead zone of a reboiler in a styrene rectification process according to the second embodiment of the present application is different in that the structural schematic diagram of the second embodiment of the apparatus for preventing polymerization in a gas phase dead zone of a reboiler in a styrene rectification process further includes:
the invention will be further described with reference to the drawings and embodiments.
Referring to fig. 3, the present invention provides another technical solution: further comprises: a mounting frame 13, wherein the top of the mounting frame 13 is fixed at the bottom of the output end of the spray pipeline 7; the water diversion pipe 14 is rotated on one side of the mounting frame 13 through a first rotating block; an adjusting assembly 15, the adjusting assembly 15 being arranged on the spray line 7; the limiting plate 16 is fixed on the spray pipeline 7, and a plurality of limiting holes 161 are formed in the limiting plate 16; and a positioning bolt 17, wherein the positioning bolt 17 is arranged between the adjusting assembly 15 and the spray pipeline 7.
The input of shunt tubes 14 communicates each other through mounting bracket 13 and the output of spray line 7 to the bottom of shunt tubes 14 is provided with the shower nozzle that corresponds, and shunt tubes 14 is provided with eight altogether, and the corresponding structure that is provided with eight spacing holes 161 on the spacing dish 16, is provided with the transmission structure of eight corresponding transfer lines 153 on the adjusting part 15, thereby conveniently drives eight corresponding shunt tubes 14 in step and rotates the regulation, thereby adjusts its pivoted inclination in step, thereby conveniently adjusts the angle and the scope of spraying.
The adjustment assembly 15 comprises an adjustment ring 151, the inner surface of the adjustment ring 151 being provided with an internally threaded surface.
The surface of the spray line 7 is provided with an external thread surface, and the external thread surface of the spray line 7 is in threaded connection with the internal thread surface of the adjusting ring 151.
The structure of the screw is convenient for the adjusting ring 151 to rotate and adjust on the spray pipeline 7, and because the adjusting ring 151 is connected with the lifting block 152 in a rotating way, the lifting block 152 at the bottom is synchronously pulled to move up and down when the adjusting ring 151 rotates and adjusts up and down, so that eight groups of corresponding transmission rods 153 at the bottom are conveniently driven to synchronously drive and adjust up and down.
The bottom of the adjusting ring 151 is rotatably connected with a lifting block 152, and one side of the lifting block 152 is rotatably connected with a transmission rod 153 through a second rotating block.
The bottom of the transmission rod 153 passes through the inside of the limit hole 161 and extends to the bottom of the limit disk 16, and the bottom of the transmission rod 153 is rotatably connected with the top of the water diversion pipe 14 through a third rotating block.
The transmission holes 161 are provided with eight transmission holes 161, and the eight transmission holes 161 are symmetrically distributed on the limiting plate 16.
Through adjusting part 15 and the top transmission of shunt tubes 14, rotate adjusting ring 151, adjusting ring 151 drives lifting block 152 through the structure of screw thread and reciprocates the regulation in step, lifting block 152's internal diameter is greater than the diameter of spray line 7, lifting block 152 can not contact with spray line 7 when adjusting from top to bottom, lifting block 152 drives the transmission pole 153 in step when moving and reciprocates the transmission, shunt tubes 14 of synchronous pulling bottom upwards lifts up when transmission pole 153 upwards packs up, the angle of lifting up of shunt tubes 14 increases gradually, and shunt tubes 14 drive the shower nozzle of bottom in step and carry out rotary adjustment, thereby adjust the scope of spraying and the angle of spraying, the angle adjustment is convenient, be applicable to the regulation of different angles and spraying scope.
The beneficial effects are that:
when the transmission rod 153 is retracted upwards, the water diversion pipe 14 at the bottom is pulled upwards synchronously, the lifting angle of the water diversion pipe 14 is gradually increased, and the water diversion pipe 14 synchronously drives the spray head at the bottom to carry out rotary adjustment, so that the spraying range and the spraying angle are adjusted, the angle adjustment is convenient, and the spray head is suitable for adjustment of different angles and spraying ranges.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (4)
1. The device for preventing polymerization of a gas phase dead zone of a reboiler in the styrene rectification process is characterized by comprising:
a reboiler;
the device comprises a first crude tower top gas phase and a first crude tower top gas phase condensate, wherein the output end of the first crude tower top gas phase is arranged at the input end of a reboiler, and the input end of the first crude tower top gas phase condensate is arranged at the output end of the reboiler;
the output end of the second crude tower kettle liquid material is arranged at the input end of the top of the reboiler through a forced circulation pump;
the second crude tower kettle liquid is discharged, and the input end of the second crude tower kettle liquid discharge is arranged at the output end of the bottom of the reboiler;
the spray pipeline is arranged between the output end of the forced circulation pump and the top of the reboiler;
the flow regulating valve is arranged on the spray pipeline;
the flowmeter is arranged between the regulating valve and the spray pipeline;
the external flange interface and the internal flange interface are arranged on the spray pipeline and are respectively positioned at the top of the reboiler and the top of the inner wall;
and the atomizing spray device is arranged at the output end of the spray pipeline, and is used for atomizing the spray liquid to uniformly spray out towards the end socket side.
2. The device for preventing polymerization of gas phase dead zone of reboiler in styrene rectification process according to claim 1, wherein the atomization spraying device comprises a spraying branch pipe, and a plurality of atomization nozzles are arranged on the spraying branch pipe.
3. The device for preventing polymerization of gas phase dead zone of reboiler in styrene rectification process according to claim 2, wherein the input end of the spray branch pipe is provided with a connecting flange, and the connecting flange is matched with the inscribed flange interface at the top of the inner wall of the reboiler.
4. A reboiler gas phase dead zone polymerization prevention device in a styrene rectification process according to claim 3, wherein the spray branch pipes are inclined downward by 45 degrees, eight spray branch pipes are provided, and two atomization nozzles are provided on each spray branch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911303460.0A CN111001177B (en) | 2019-12-17 | 2019-12-17 | Device for preventing polymerization of reboiler gas phase dead zone in styrene rectification process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911303460.0A CN111001177B (en) | 2019-12-17 | 2019-12-17 | Device for preventing polymerization of reboiler gas phase dead zone in styrene rectification process |
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| CN111001177A CN111001177A (en) | 2020-04-14 |
| CN111001177B true CN111001177B (en) | 2023-05-30 |
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