CN112595133A - Industrial naphthalene vaporization and condensation cooler and working method thereof - Google Patents
Industrial naphthalene vaporization and condensation cooler and working method thereof Download PDFInfo
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- CN112595133A CN112595133A CN202011548728.XA CN202011548728A CN112595133A CN 112595133 A CN112595133 A CN 112595133A CN 202011548728 A CN202011548728 A CN 202011548728A CN 112595133 A CN112595133 A CN 112595133A
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- Prior art keywords
- shell
- cooler
- naphthalene
- condensation cooler
- industrial naphthalene
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 238000009833 condensation Methods 0.000 title claims abstract description 72
- 230000005494 condensation Effects 0.000 title claims abstract description 72
- 238000009834 vaporization Methods 0.000 title claims abstract description 20
- 230000008016 vaporization Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000005192 partition Methods 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 7
- 238000004821 distillation Methods 0.000 description 6
- 239000011280 coal tar Substances 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to an industrial naphthalene vaporization condensation cooler and a working method thereof, wherein the industrial naphthalene vaporization condensation cooler comprises an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; and a communicating part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition plate is arranged in the communicating part, a communicating hole is formed in the partition plate, and an exhaust cap is arranged at the communicating hole. In the invention, the steam condensation cooler adopts the air condensation cooler to replace the conventional circulating water condensation cooler, so that the consumption of circulating water is effectively reduced, and the aim of saving energy is fulfilled.
Description
Technical Field
The invention relates to the technical field of industrial naphthalene distillation, in particular to an industrial naphthalene vaporization and condensation cooler and a working method thereof.
Background
Naphthalene is a main product processed from coal tar, accounts for about 10% -12% of coal tar, belongs to an important organic chemical basic raw material, and is widely used for producing products such as dyes, medicines and the like. The naphthalene produced by the coal tar comprises industrial naphthalene and refined naphthalene, the crystallization point of the industrial naphthalene is not lower than 78 ℃, the naphthalene content is not lower than 95%, the crystallization point of the refined naphthalene is not lower than 79.6 ℃, and the naphthalene content of the refined naphthalene is not lower than 99%. The separation and refining of naphthalene is an important link in the coal tar processing process and is also an important way for obtaining naphthalene. Currently, industrial naphthalene distillation is a conventional process for making industrial naphthalene.
The industrial naphthalene distillation is divided into three process routes of reduced pressure distillation, atmospheric distillation and pressurized distillation, and as the crystallization point of the industrial naphthalene is not lower than 78 ℃, an industrial naphthalene vaporization and condensation cooler is usually selected as a cooling device for industrial naphthalene products in order to prevent the industrial naphthalene from generating crystals in the cooling process.
The industrial naphthalene vaporization condensation cooler is composed of two parts, wherein the upper part is a water vapor condensation cooler, the lower part is an industrial naphthalene condensation cooler, water is heated and vaporized in the cooling process of the lower part of the industrial naphthalene, water vapor enters the water vapor condensation cooler on the upper part and is condensed and cooled into condensate by circulating water, and the condensate returns to the lower part to form closed circulation of the water and the water vapor, and the industrial naphthalene is cooled by hot water equivalently and cannot be crystallized to cause blockage.
The water vapor condensation cooler on the upper part of the industrial naphthalene vaporization condensation cooler, the cooling medium is circulating water, and the cooling object of the industrial naphthalene vaporization condensation cooler is industrial naphthalene vapor coming out from the top of the industrial naphthalene rectifying tower and usually arranged at the top of the frame, so the air condensation cooler can be selected for condensation cooling of the water vapor, a certain amount of circulating water can be saved, the air condensation cooler can be selected or used in northern areas, and the air cooling is adopted to replace water cooling and is also an important measure for realizing energy conservation for northern production enterprises.
Disclosure of Invention
The invention provides an industrial naphthalene vaporization condensation cooler and a working method thereof, wherein an air condensation cooler is adopted in a water vapor condensation cooler to replace a conventional circulating water condensation cooler, so that the consumption of circulating water is effectively reduced, and the aim of saving energy is fulfilled.
In order to achieve the purpose, the invention adopts the following technical scheme:
an industrial naphthalene vaporization condensation cooler comprises an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; a communicating part is arranged between the air condensing cooler and the industrial naphthalene condensing cooler, a partition plate is arranged in the communicating part, a communicating hole is formed in the partition plate, and an exhaust cap is arranged at the communicating hole; the industrial naphthalene condensation cooler is a tube array condensation cooler and comprises a shell, heat exchange tubes, an upper tube plate and a lower tube plate, wherein the heat exchange tubes are vertically arranged in the shell, the upper ends of the heat exchange tubes are connected with the shell through the upper tube plate, and the lower ends of the heat exchange tubes are connected with the shell through the lower tube plate; one side of the upper part of the shell is provided with a naphthalene steam inlet, and the other side of the lower part of the shell is provided with a naphthalene oil outlet; a supplementary water inlet is arranged at one side of the communicating part below the clapboard.
The industrial naphthalene condensing cooler also comprises a lower tube box; the space between the upper tube plate and the partition plate is equivalent to the upper tube box; a steam condensate outlet is formed in one side of the communication part above the partition plate, a steam condensate inlet is formed in the same side of the lower tube box, and the steam condensate outlet is connected with the steam condensate inlet through a steam condensate drain pipe; the lower part of the other side of the lower tube box is provided with a vent pipe, the bottom of the lower tube box is provided with an inclined plate, and one end of the inclined plate, which corresponds to the steam condensate inlet, is higher than one end of the inclined plate, which corresponds to the vent pipe.
One side of the upper part of the shell of the industrial naphthalene condensation cooler is provided with a first exhaust hole, and the other side of the lower part of the shell of the industrial naphthalene condensation cooler is provided with a steam sweeping pipe.
The shell and tube condensing cooler is a fixed tube plate type steam-water heat exchanger, an upper tube plate is connected with the communicating part through a flange, and a lower tube plate is connected with a lower tube box through a flange.
The air condensing cooler is composed of an upper air collecting shell and a plurality of finned tubes, wherein the top of the upper air collecting shell is provided with a second exhaust hole, the bottom of the upper air collecting shell is communicated with the top ends of the finned tubes, the spaces between the finned tubes and the partition plates are equivalent to the lower air collecting shell, and the bottom ends of the finned tubes are communicated with the lower air collecting shell.
A working method of an industrial naphthalene vaporization and condensation cooler comprises the following steps:
1) in an industrial naphthalene condensation cooler, hot water passes through a tube pass, and industrial naphthalene passes through a shell pass; naphthalene vapor at the temperature of 200-240 ℃ enters from a naphthalene vapor inlet at the upper part of the shell, exchanges heat with hot water at the temperature of 80-100 ℃ in a tube pass, is condensed and cooled into liquid industrial naphthalene, and flows out from a naphthalene oil outlet at the lower part of the shell; the hot water in the tube pass is vaporized after heat exchange, and the water vapor upwards enters the communicating part and enters the air condensing cooler above the communicating part after passing through the exhaust cap;
2) after entering the air condensation cooler, the water vapor exchanges heat with air in the plurality of fin tubes, is condensed and cooled by the air to form vapor condensate, falls onto the partition plate below, passes through the vapor condensate outlet, passes through the vapor condensate discharge tube, enters the lower tube box from the vapor condensate inlet, and enters the tube pass of the industrial naphthalene condensation cooler;
3) in the air condensing cooler and the industrial naphthalene condensing cooler, water and water vapor form a closed cycle.
Compared with the prior art, the invention has the beneficial effects that:
1) the water vapor condensation cooler adopts an air condensation cooler to replace a conventional circulating water condensation cooler, so that the consumption of circulating water is effectively reduced, and the aim of saving energy is fulfilled;
2) the air condensing cooler at the upper part and the industrial naphthalene condensing cooler at the lower part are separated by a partition plate, and an exhaust cap is arranged on the partition plate, so that water vapor can pass through the partition plate, and condensate can be prevented from flowing backwards;
3) a make-up water inlet is arranged for adding boiler feed water before start-up, a first exhaust hole and a second exhaust hole are arranged for exhausting non-condensable gas at corresponding positions, and an emptying pipe is arranged for emptying boiler feed water.
Drawings
FIG. 1 is a schematic diagram of an industrial naphthalene vaporization and condensation cooler according to the present invention.
In the figure: 1. naphthalene vapor inlet 2, naphthalene oil outlet 3, exhaust cap 4, steam condensate outlet 5, steam condensate inlet 6, steam purging pipe 7, exhaust hole I8, exhaust hole II 9, blow-down pipe 10, fin pipe 11, heat exchange pipe 12, partition plate 13, upper pipe plate 14, lower pipe plate 15, steam condensate drain pipe 16 and make-up water inlet
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1, the industrial naphthalene vaporization condensation cooler of the present invention comprises an air condensation cooler disposed at the upper part and an industrial naphthalene condensation cooler disposed at the lower part; a communicating part is arranged between the air condensation cooler and the industrial naphthalene condensation cooler, a partition plate 12 is arranged in the communicating part, a communicating hole is arranged on the partition plate 12, and an exhaust cap 3 is arranged at the communicating hole; the industrial naphthalene condensation cooler is a tube array condensation cooler and comprises a shell, heat exchange tubes 11, an upper tube plate 13 and a lower tube plate 14, wherein the heat exchange tubes 11 are vertically arranged in the shell, the upper ends of the heat exchange tubes 11 are connected with the shell through the upper tube plate 13, and the lower ends of the heat exchange tubes 11 are connected with the shell through the lower tube plate 14; one side of the upper part of the shell is provided with a naphthalene vapor inlet 1, and the other side of the lower part of the shell is provided with a naphthalene oil outlet 2; a makeup water inlet 16 is provided on the side of the communication portion below the partition plate 12.
The industrial naphthalene condensing cooler also comprises a lower tube box; the space between the upper tube plate 13 and the partition plate 12 corresponds to an upper tube box; a steam condensate outlet 4 is arranged on one side of the communication part above the partition plate 12, a steam condensate inlet 5 is arranged on the same side of the lower tube box, and the steam condensate outlet 4 is connected with the steam condensate inlet 5 through a steam condensate drain pipe 15; and a vent pipe 9 is arranged at the lower part of the other side of the lower pipe box, an inclined plate is arranged at the bottom of the lower pipe box, and one end of the inclined plate, which corresponds to the steam condensate inlet 5, is higher than one end of the inclined plate, which corresponds to the vent pipe 9.
And one side of the upper part of the shell of the industrial naphthalene condensation cooler is provided with a first exhaust hole 7, and the other side of the lower part of the shell of the industrial naphthalene condensation cooler is provided with a steam sweeping pipe 6.
The shell and tube condensing cooler is a fixed tube plate type steam-water heat exchanger, an upper tube plate 13 is connected with the communicating part through a flange, and a lower tube plate 14 is connected with a lower tube box through a flange.
The air condensation cooler is composed of an upper air collecting shell and a plurality of finned tubes 10, wherein the top of the upper air collecting shell is provided with a second exhaust hole 8, the bottom of the upper air collecting shell is communicated with the top ends of the finned tubes 10, the space between the finned tubes 10 and the partition plate 12 is equivalent to the lower air collecting shell, and the bottom ends of the finned tubes 10 are communicated with the lower air collecting shell.
The invention relates to a working method of an industrial naphthalene vaporization and condensation cooler, which comprises the following steps:
1) in an industrial naphthalene condensation cooler, hot water passes through a tube pass, and industrial naphthalene passes through a shell pass; naphthalene vapor at 200-240 ℃ enters from a naphthalene vapor inlet 1 at the upper part of the shell, exchanges heat with hot water at 80-100 ℃ in a tube pass, is condensed and cooled into liquid industrial naphthalene, and flows out from a naphthalene oil outlet 2 at the lower part of the shell; the hot water in the tube pass is vaporized after heat exchange, and the water vapor upwards enters the communicating part and enters the air condensing cooler above the communicating part after passing through the exhaust cap 3;
2) after entering the air condensation cooler, the water vapor exchanges heat with air in the plurality of finned tubes 10, is condensed and cooled by the air to form steam condensate, falls onto the partition plate 12 below, passes through the steam condensate outlet 4, passes through the steam condensate drain pipe 15, enters the lower pipe box from the steam condensate inlet 5, and enters the pipe pass of the industrial naphthalene condensation cooler;
3) in the air condensing cooler and the industrial naphthalene condensing cooler, water and water vapor form a closed cycle.
In the industrial naphthalene condensation cooler, the level height of hot water for heat exchange is determined by the full flow height of a process pipeline.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The industrial naphthalene vaporization and condensation cooler is characterized by comprising an air condensation cooler arranged at the upper part and an industrial naphthalene condensation cooler arranged at the lower part; a communicating part is arranged between the air condensing cooler and the industrial naphthalene condensing cooler, a partition plate is arranged in the communicating part, a communicating hole is formed in the partition plate, and an exhaust cap is arranged at the communicating hole; the industrial naphthalene condensation cooler is a tube array condensation cooler and comprises a shell, heat exchange tubes, an upper tube plate and a lower tube plate, wherein the heat exchange tubes are vertically arranged in the shell, the upper ends of the heat exchange tubes are connected with the shell through the upper tube plate, and the lower ends of the heat exchange tubes are connected with the shell through the lower tube plate; one side of the upper part of the shell is provided with a naphthalene steam inlet, and the other side of the lower part of the shell is provided with a naphthalene oil outlet; a supplementary water inlet is arranged at one side of the communicating part below the clapboard.
2. The industrial naphthalene vaporization and condensation cooler of claim 1, further comprising a lower tube box; the space between the upper tube plate and the partition plate is equivalent to the upper tube box; a steam condensate outlet is formed in one side of the communication part above the partition plate, a steam condensate inlet is formed in the same side of the lower tube box, and the steam condensate outlet is connected with the steam condensate inlet through a steam condensate drain pipe; the lower part of the other side of the lower tube box is provided with a vent pipe, the bottom of the lower tube box is provided with an inclined plate, and one end of the inclined plate, which corresponds to the steam condensate inlet, is higher than one end of the inclined plate, which corresponds to the vent pipe.
3. The industrial naphthalene vaporization and condensation cooler as claimed in claim 1 or 2, wherein one side of the upper part of the shell of the industrial naphthalene condensation cooler is provided with a first exhaust hole, and the other side of the lower part of the shell is provided with a steam purging pipe.
4. The industrial naphthalene vaporization condensation cooler of claim 1, wherein the tubular condensation cooler is a fixed tube-plate type steam-water heat exchanger, the upper tube plate is connected with the communicating part through a flange, and the lower tube plate is connected with the lower tube box through a flange.
5. The industrial naphthalene vaporization condensation cooler according to claim 1, wherein the air condensation cooler is composed of an upper air collection shell and a plurality of finned tubes, the top of the upper air collection shell is provided with a second exhaust hole, the bottom of the upper air collection shell is communicated with the top ends of the finned tubes, spaces between the finned tubes and the partition plate are equivalent to the lower air collection shell, and the bottom ends of the finned tubes are communicated with the lower air collection shell.
6. A method of operating an industrial naphthalene vapor condensate cooler as set forth in claim 1, comprising:
1) in an industrial naphthalene condensation cooler, hot water passes through a tube pass, and industrial naphthalene passes through a shell pass; naphthalene vapor at the temperature of 200-240 ℃ enters from a naphthalene vapor inlet at the upper part of the shell, exchanges heat with hot water at the temperature of 80-100 ℃ in a tube pass, is condensed and cooled into liquid industrial naphthalene, and flows out from a naphthalene oil outlet at the lower part of the shell; the hot water in the tube pass is vaporized after heat exchange, and the water vapor upwards enters the communicating part and enters the air condensing cooler above the communicating part after passing through the exhaust cap;
2) after entering the air condensation cooler, the water vapor exchanges heat with air in the plurality of fin tubes, is condensed and cooled by the air to form vapor condensate, falls onto the partition plate below, passes through the vapor condensate outlet, passes through the vapor condensate discharge tube, enters the lower tube box from the vapor condensate inlet, and enters the tube pass of the industrial naphthalene condensation cooler;
3) in the air condensing cooler and the industrial naphthalene condensing cooler, water and water vapor form a closed cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548728.XA CN112595133A (en) | 2020-12-24 | 2020-12-24 | Industrial naphthalene vaporization and condensation cooler and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548728.XA CN112595133A (en) | 2020-12-24 | 2020-12-24 | Industrial naphthalene vaporization and condensation cooler and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112595133A true CN112595133A (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011548728.XA Pending CN112595133A (en) | 2020-12-24 | 2020-12-24 | Industrial naphthalene vaporization and condensation cooler and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112595133A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191022863A (en) * | 1910-10-03 | 1911-02-02 | Carl Still | Improvements in Coolers for Condensing Mixtures of Hydrocarbon and Steam. |
| CN202379973U (en) * | 2011-12-15 | 2012-08-15 | 洛阳隆华传热科技股份有限公司 | Air cooler for brewing spirit |
| CN103122261A (en) * | 2013-02-25 | 2013-05-29 | 襄阳双利环保设备有限公司 | Method for eliminating naphthaline in high-temperature coke-oven gas |
| CN104628608A (en) * | 2015-02-16 | 2015-05-20 | 曲靖众一合成化工有限公司 | Method and device for blowing naphthalene via gas stripping by using tower type negative pressure continuous inert gas |
| CN107937042A (en) * | 2017-12-22 | 2018-04-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of compound chilling tower |
| CN110170178A (en) * | 2019-05-27 | 2019-08-27 | 中冶焦耐(大连)工程技术有限公司 | A kind of condensing unit distilling tower top |
| CN210186474U (en) * | 2019-05-27 | 2020-03-27 | 中冶焦耐(大连)工程技术有限公司 | System for controlling tower top reflux amount in tar processing and benzene hydrogenation processes |
| CN111187139A (en) * | 2020-03-06 | 2020-05-22 | 中冶焦耐(大连)工程技术有限公司 | Industrial naphthalene oil gas cooling process and system for byproduct steam |
| CN214537452U (en) * | 2020-12-24 | 2021-10-29 | 中冶焦耐(大连)工程技术有限公司 | Industrial naphthalene vaporization condensation cooler |
-
2020
- 2020-12-24 CN CN202011548728.XA patent/CN112595133A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191022863A (en) * | 1910-10-03 | 1911-02-02 | Carl Still | Improvements in Coolers for Condensing Mixtures of Hydrocarbon and Steam. |
| CN202379973U (en) * | 2011-12-15 | 2012-08-15 | 洛阳隆华传热科技股份有限公司 | Air cooler for brewing spirit |
| CN103122261A (en) * | 2013-02-25 | 2013-05-29 | 襄阳双利环保设备有限公司 | Method for eliminating naphthaline in high-temperature coke-oven gas |
| CN104628608A (en) * | 2015-02-16 | 2015-05-20 | 曲靖众一合成化工有限公司 | Method and device for blowing naphthalene via gas stripping by using tower type negative pressure continuous inert gas |
| CN107937042A (en) * | 2017-12-22 | 2018-04-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of compound chilling tower |
| CN110170178A (en) * | 2019-05-27 | 2019-08-27 | 中冶焦耐(大连)工程技术有限公司 | A kind of condensing unit distilling tower top |
| CN210186474U (en) * | 2019-05-27 | 2020-03-27 | 中冶焦耐(大连)工程技术有限公司 | System for controlling tower top reflux amount in tar processing and benzene hydrogenation processes |
| CN111187139A (en) * | 2020-03-06 | 2020-05-22 | 中冶焦耐(大连)工程技术有限公司 | Industrial naphthalene oil gas cooling process and system for byproduct steam |
| CN214537452U (en) * | 2020-12-24 | 2021-10-29 | 中冶焦耐(大连)工程技术有限公司 | Industrial naphthalene vaporization condensation cooler |
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