CN220530674U - Naphthalene evaporator in improved phthalic anhydride production device - Google Patents
Naphthalene evaporator in improved phthalic anhydride production device Download PDFInfo
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- CN220530674U CN220530674U CN202321871387.9U CN202321871387U CN220530674U CN 220530674 U CN220530674 U CN 220530674U CN 202321871387 U CN202321871387 U CN 202321871387U CN 220530674 U CN220530674 U CN 220530674U
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- heat exchanger
- tank
- reboiling
- outlet
- inlet
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- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 36
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 25
- 230000008020 evaporation Effects 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000005192 partition Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 6
- 238000004220 aggregation Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model provides a naphthalene evaporator in an improved phthalic anhydride production device, wherein the top of an evaporation tank is provided with a sprayer mounting port, the bottom of the evaporation tank is provided with a circulating outlet, the side wall of the evaporation tank is provided with a discharge port, a feed back inlet, a steam inlet and a condensate outlet, a first heat exchanger is arranged in the tank, and the steam inlet and the condensate outlet are connected with a heating medium cavity of the first heat exchanger one by one; the sprayer is arranged on the sprayer mounting opening, and the spray header of the sprayer stretches into the evaporation tank and is positioned above the first heat exchanger; the top of the reboiling tank is provided with a raw material steam outlet, the bottom of the reboiling tank is provided with a heat exchanger mounting port, and the side wall of the reboiling tank is provided with a reboiling inlet, a return material outlet and a finished liquid outlet; the discharge port is communicated with the reboiling inlet; the second heat exchanger is arranged at the heat exchanger mounting opening, and the heat exchange pipe of the second heat exchanger stretches into the reboiling tank. According to the utility model, the heat exchange efficiency can be improved, the heat exchange pipes are vertically arranged to enable materials to flow vertically, aggregation is not easy, the heat exchange pipes are not required to be disassembled during cleaning, and cleaning and maintenance are easy.
Description
Technical Field
The utility model belongs to the technical field of phthalic anhydride production, and particularly relates to an improved naphthalene evaporator in a phthalic anhydride production device.
Background
Patent publication No. CN212395888U filed by the applicant discloses an improved naphthalene evaporator in a phthalic anhydride production plant. In the practical application process, the applicant finds that the naphthalene evaporator still has the condition of component aggregation, because the heat medium flows in the heat exchange tubes of the heater, and the components flow among the heat exchange tubes and exchange heat through the heat exchange tube walls, and because the heat exchange tubes are more in number and the structure is bent, the components are easy to aggregate in gaps among the heat exchange tubes, and the heat exchanger must be removed during cleaning, so that maintenance work is inconvenient. In addition, there is a problem in that the thermal efficiency is not high.
Disclosure of Invention
The utility model aims to provide an improved naphthalene evaporator in a phthalic anhydride production device, which can improve the thermal efficiency and does not cause component aggregation.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an improved naphthalene evaporator in a phthalic anhydride production unit, comprising:
the evaporator comprises an evaporator tank, wherein the top of the evaporator tank is provided with a sprayer mounting port, the bottom of the evaporator tank is provided with a circulating outlet, the side wall of the evaporator tank is provided with a discharge port, a return material inlet, a steam inlet and a condensate water outlet, a first heat exchanger is arranged in the evaporator tank, the steam inlet and the condensate water outlet are connected with a heating medium cavity of the first heat exchanger one by one, the discharge port is positioned above the first heat exchanger, and the return material inlet is positioned below the first heat exchanger;
the sprayer is arranged on the sprayer mounting opening, and a spray header of the sprayer extends into the evaporation tank and is positioned above the first heat exchanger;
the top of the reboiling tank is provided with a raw material steam outlet, the bottom of the reboiling tank is provided with a heat exchanger mounting port, and the side wall of the reboiling tank is provided with a reboiling inlet, a return material outlet and a finished liquid outlet; the feed back outlet is connected with the feed back inlet, the feed back outlet is higher than the feed back inlet, and the discharge outlet is communicated with the reboiling inlet;
the second heat exchanger is arranged at the heat exchanger mounting port, and a heat exchange pipe of the second heat exchanger extends into the reboiling tank.
Further, the first heat exchanger comprises two main partition boards one above the other and two heat exchange pipes penetrating through the two main partition boards; the two main partition boards divide the pipe interior into a spray cavity, a heat exchange cavity and a bottom cavity.
Further, the first heat exchanger further comprises a plurality of auxiliary partition plates arranged between the two main partition plates from top to bottom, the plurality of auxiliary partition plates divide the heat exchange cavity into a plurality of heat medium cavities, and the auxiliary partition plates are provided with vent holes; the vent holes on the auxiliary partition boards with different heights are reversely arranged, so that the heat medium cavities are communicated end to end in sequence.
Further, a magnetic coupler is installed at the bottom of the evaporation tank, a motor is installed at the outer side of the magnetic coupler, and blades are installed at the inner side of the magnetic coupler.
Further, the circulation outlet is communicated with a raw material pipe of the sprayer, and a circulation pump is arranged in the pipeline.
Further, a solenoid valve is arranged in a pipeline between the return outlet and the return inlet; and liquid level meters are arranged at the bottoms in the reboiling tanks.
Compared with the prior art, the utility model has the beneficial effects that:
1) According to the utility model, raw materials are input into the evaporation tank in a spraying manner, so that the heat exchange efficiency can be improved, and the heat exchange pipes are vertically arranged to enable the materials to flow vertically, so that the materials are not easy to gather, the heat exchange pipes are not required to be disassembled during cleaning, and the cleaning and maintenance are easy; the evaporation tank can carry out secondary heating to establish material thermal cycle, improve the heat exchange rate by a wide margin.
2) The internal heat medium channel of the first heat exchanger adopts an S-shaped structure, so that the flow path can be prolonged, the heat exchange time can be prolonged, and the heat exchange efficiency can be further improved.
3) The evaporation tank is provided with a stirring function, and certain stirring force is applied to the liquid-phase raw material so as to accelerate the evaporation of naphthalene, thereby further improving the system efficiency; meanwhile, the stirring force transmission adopts a magnetic coupler, so that reliable installation can be avoided in the opening of the tank body, and the manufacturing difficulty and the sealing requirement are reduced.
Drawings
FIG. 1 is a perspective view of a preferred embodiment of the present utility model;
FIG. 2 is a front elevational view of the embodiment of FIG. 1;
FIG. 3 is a front view of the structure of the evaporation tank in the embodiment shown in FIG. 1;
FIG. 4 is a cross-sectional view of the evaporator shown in FIG. 3;
FIG. 5 is a front view of the structure of the reboiling tank in the embodiment shown in FIG. 1;
fig. 6 is a sectional view of the structure of the reboiling tank in fig. 5.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 6, this embodiment discloses a naphthalene evaporator in an improved phthalic anhydride production apparatus, comprising an evaporation tank 1, a shower 5, a reboiling tank 2, and a second heat exchanger 4. The evaporation tank 1 and the reboiling tank 2 are both arranged vertically.
The top of the evaporation tank 1 is provided with a sprayer mounting port 1.1, the bottom of the evaporation tank is provided with a circulating outlet 1.4, the side wall of the evaporation tank is provided with a discharge port 1.2, a feed back inlet 1.3, a steam inlet 1.5 and a condensate water outlet 1.6, and a first heat exchanger is arranged in the evaporation tank. The steam inlet 1.5 and the condensed water outlet 1.6 are connected with the heating medium cavity of the first heat exchanger one by one, the discharge port 1.2 is positioned above the first heat exchanger, and the return inlet 1.3 is positioned below the first heat exchanger. Specifically, the first heat exchanger comprises two main baffles 1.9 one above the other and heat exchange tubes 1.11 penetrating through the two main baffles 1.9. The two main partition boards 1.9 divide the pipe into a spraying cavity 1.7, a heat exchange cavity 1.10 and a bottom cavity 1.8. The raw materials are conveyed from top to bottom and enter the heat exchange tube 1.11, and the steam in the heat medium cavity conducts heat to the raw materials in the heat exchange tube 1.11, so that the raw materials are heated and reach an evaporation state. The steam exchanges heat, undergoes a condensation phase change and is discharged from a condensate outlet 1.6. The raw materials also undergo phase change after heat exchange and are discharged from a discharge port 1.2 into a reboiling tank 2.
Preferably, the first heat exchanger further comprises a plurality of auxiliary partition plates 1.12 arranged between the two main partition plates 1.9 from top to bottom, the plurality of auxiliary partition plates 1.12 divide the heat exchange cavity 1.10 into a plurality of heat medium cavities, and the auxiliary partition plates 1.12 are provided with vent holes 1.13. The vent holes 1.13 on the auxiliary partition boards 1.12 with different heights are arranged in opposite directions, so that the heat medium cavities are communicated end to end in sequence, an S-shaped heat exchange channel is formed, the path of steam is increased, the heat exchange time is prolonged, and the heat exchange effect is finally improved.
As shown in fig. 4, the sprayer 5 is mounted on the sprayer mounting opening 1.1, and the spray header 5.1 thereof extends into the evaporation tank 1 at a position above the first heat exchanger. According to the heat exchange mode, the raw materials vertically flow in the heat exchange tube, the flowing process is not hindered by any structure, the heat exchange tube is regular in structure, and raw material aggregation and blockage can not occur. And only the inner wall of the heat exchange tube is required to be washed during cleaning, and the disassembly is not required. On the other hand, because the spraying mode is adopted for feeding, compared with the heat exchange mode that the heat exchanger is immersed in the raw material in the prior art, the heat exchange mode has higher efficiency of taking part in heat exchange of the raw material in unit volume. The circulation outlet 1.4 communicates with the raw material pipe of the shower 5 and a circulation pump 6 is provided in the pipe. The raw material coming to the bottom of the evaporating pot 1 is conveyed by the circulating pump 6 to return to the feeding pipeline again, and enters the pot for heat exchange in a spraying mode.
The top of the reboiling pot 2 is provided with a raw material steam outlet 2.4, the bottom of the reboiling pot is provided with a heat exchanger mounting port, and the side wall of the reboiling pot is provided with a reboiling inlet 2.1, a return material outlet 2.2 and a finished liquid outlet 2.3. The feed back outlet 2.2 is connected with the feed back inlet 1.3, the feed back inlet is higher than the feed back inlet, and the discharge outlet 1.2 is communicated with the reboiling inlet 2.1. The bottom of the reboiling tank 2 is of a conical structure, and the return outlet 2.2 and the finished liquid outlet 2.3 are both arranged on the wall of the conical tank.
The second heat exchanger 4 is arranged at the heat exchanger mounting port, and the heat exchange pipe extends into the reboiling tank 2. Part of the raw materials are evaporated and then enter the reboiling tank 2, the naphthalene is ensured to be completely gasified under the continuous heating effect, and liquid drops fall down and gather. The part of the second heat exchanger 4 located outside the reboiling tank 2 is provided with a steam inlet 4.1 and a condensate outlet 4.2.
The bottom of the evaporation tank 1 is provided with a magnetic coupler 8, the outer side of the magnetic coupler 8 is provided with a motor 3, and the inner side of the magnetic coupler is provided with a blade 7. The magnetic coupler 8 can avoid the opening of the tank body, realize non-contact transmission, and reduce the manufacturing difficulty and sealing requirement of the tank body. The blades 7 generate stirring force under the drive of the motor 3, so that the liquid in the evaporation tank 1 is in a low-speed stirring state, and evaporation of naphthalene is accelerated.
A solenoid valve 9 is arranged in the pipeline between the return outlet 2.2 and the return inlet 1.3. The bottom in the reboiling tank 2 is provided with a liquid level meter. When the liquid level in the reboiling tank 2 reaches a preset height, the electromagnetic valve 9 is opened, the liquid in the reboiling tank 2 flows into the reboiling tank 1, so that the heat exchange pressure of the second heat exchanger in the reboiling tank 2 is reduced, and when the liquid level in the reboiler falls to the preset height, the electromagnetic valve 9 is closed.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Finally, what is to be described is: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the examples, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (6)
1. An improved naphthalene evaporator in a phthalic anhydride production device is characterized in that: comprising the following steps:
the evaporator comprises an evaporator tank (1), wherein a sprayer mounting port (1.1) is arranged at the top of the evaporator tank (1), a circulating outlet (1.4) is arranged at the bottom of the evaporator tank, a discharge port (1.2), a feed back inlet (1.3), a steam inlet (1.5) and a condensate water outlet (1.6) are arranged on the side wall of the evaporator tank, a first heat exchanger is arranged in the evaporator tank, the steam inlet (1.5) and the condensate water outlet (1.6) are connected with a heating medium cavity of the first heat exchanger one by one, the discharge port (1.2) is positioned above the first heat exchanger, and the feed back inlet (1.3) is positioned below the first heat exchanger;
the sprayer (5) is arranged on the sprayer mounting opening (1.1), and the spray header (5.1) of the sprayer extends into the evaporation tank (1) and is positioned above the first heat exchanger;
the device comprises a reboiling tank (2), wherein a raw material steam outlet (2.4) is formed in the top of the reboiling tank (2), a heat exchanger mounting port is formed in the bottom of the reboiling tank, and a reboiling inlet (2.1), a feed back outlet (2.2) and a finished liquid outlet (2.3) are formed in the side wall of the reboiling tank; the feed back outlet (2.2) is connected with the feed back inlet (1.3) and is higher than the feed back inlet (1.3), and the discharge outlet (1.2) is communicated with the reboiling inlet (2.1);
the second heat exchanger (4), the second heat exchanger (4) is installed in heat exchanger installing port department, and its heat exchange tube stretches into reboiling jar (2) inside.
2. An improved naphthalene evaporator in a phthalic anhydride unit according to claim 1, wherein: the first heat exchanger comprises two main partition boards (1.9) which are arranged one above the other and two heat exchange pipes (1.11) which penetrate through the two main partition boards (1.9); the two main partition boards (1.9) divide the pipe into a spray cavity (1.7), a heat exchange cavity (1.10) and a bottom cavity (1.8).
3. An improved naphthalene evaporator in a phthalic anhydride unit according to claim 2, wherein: the first heat exchanger further comprises a plurality of auxiliary partition boards (1.12) which are arranged between the two main partition boards (1.9) from top to bottom, the plurality of auxiliary partition boards (1.12) divide the heat exchange cavity (1.10) into a plurality of heat medium cavities, and the auxiliary partition boards (1.12) are provided with vent holes (1.13); the vent holes (1.13) on the auxiliary partition boards (1.12) with different heights are arranged in opposite directions, so that the heat medium cavities are communicated end to end in sequence.
4. An improved naphthalene evaporator in a phthalic anhydride unit according to claim 1, wherein: the bottom of the evaporation tank (1) is provided with a magnetic coupler (8), the outer side of the magnetic coupler (8) is provided with a motor (3), and the inner side of the magnetic coupler is provided with a blade (7).
5. An improved naphthalene evaporator in a phthalic anhydride unit according to claim 1, wherein: the circulating outlet (1.4) is communicated with a raw material pipe of the sprayer (5), and a circulating pump (6) is arranged in the pipeline.
6. An improved naphthalene evaporator in a phthalic anhydride unit according to claim 1, wherein: an electromagnetic valve (9) is arranged in a pipeline between the return outlet (2.2) and the return inlet (1.3); and liquid level meters are arranged at the bottoms in the reboiling tanks (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321871387.9U CN220530674U (en) | 2023-07-17 | 2023-07-17 | Naphthalene evaporator in improved phthalic anhydride production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321871387.9U CN220530674U (en) | 2023-07-17 | 2023-07-17 | Naphthalene evaporator in improved phthalic anhydride production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220530674U true CN220530674U (en) | 2024-02-27 |
Family
ID=89973456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321871387.9U Active CN220530674U (en) | 2023-07-17 | 2023-07-17 | Naphthalene evaporator in improved phthalic anhydride production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220530674U (en) |
-
2023
- 2023-07-17 CN CN202321871387.9U patent/CN220530674U/en active Active
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