CN111218295B - Gas forward circulation falling film cooling method and device - Google Patents
Gas forward circulation falling film cooling method and device Download PDFInfo
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- CN111218295B CN111218295B CN202010150653.3A CN202010150653A CN111218295B CN 111218295 B CN111218295 B CN 111218295B CN 202010150653 A CN202010150653 A CN 202010150653A CN 111218295 B CN111218295 B CN 111218295B
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- asphalt
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- liquid
- downcomer
- circulating
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- 239000011552 falling film Substances 0.000 title claims abstract description 49
- 238000001816 cooling Methods 0.000 title claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 243
- 239000010426 asphalt Substances 0.000 claims abstract description 169
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 120
- 239000007788 liquid Substances 0.000 claims abstract description 74
- 239000010408 film Substances 0.000 claims abstract description 36
- 238000003860 storage Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 10
- 238000000465 moulding Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000011883 electrode binding agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/14—Solidifying, Disintegrating, e.g. granulating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Working-Up Tar And Pitch (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a gas forward circulation falling film cooling method and a device, wherein the device comprises an asphalt falling film cooler consisting of a downcomer liquid-liquid heat exchanger and an asphalt storage tank; and a circulating nitrogen inlet is formed in one side above the downcomer liquid-liquid heat exchanger, a circulating nitrogen outlet is formed in one side above the asphalt storage tank, the circulating nitrogen outlet is connected with the circulating nitrogen inlet through an external circulating nitrogen pipeline, and a nitrogen circulating fan and a flow recording interlocking instrument are sequentially arranged on the circulating nitrogen pipeline along the nitrogen flowing direction. The invention improves the natural asphalt film forming mode of the existing asphalt falling film cooler, adopts circulating nitrogen to drive film forming liquid to flow downwards rapidly, provides auxiliary power for asphalt film forming, accelerates the flow rate of asphalt, and makes the film forming thin and uniform, thus greatly improving the heat exchange efficiency; along with the increase of the flow rate of the circulating nitrogen, the treatment capacity of the raw materials can be improved, and the operation flexibility of the equipment is greatly improved.
Description
Technical Field
The invention relates to the technical field of asphalt production and deep processing, in particular to a method and a device for cooling a gas forward circulation falling film.
Background
In the coal tar processing process, about 50% -60% of medium-temperature asphalt is generally produced, which belongs to a large number of products for tar processing, and the modified asphalt is a main downstream product of the medium-temperature asphalt at present and is mainly used for producing prebaked anodes and preparing battery bars or electrode binders in the electrolytic aluminum industry.
The produced medium-temperature asphalt and modified asphalt products are sold mainly in a solid mode of asphalt solidification and cooling molding, and the produced hot asphalt (medium-temperature asphalt or modified asphalt) needs to be cooled to low-temperature liquid asphalt for solidification and molding.
The characteristics of the liquid asphalt itself are: the asphalt has high viscosity, high softening point up to 105 deg.c, and asphalt forming temperature as low as 150 deg.c, so that the asphalt cooler is easy to block. In the past, the cooling is carried out by a standing natural cooling mode of a high-placed tank, but the mode is only suitable for small-scale production. For large-scale production, medium-temperature asphalt produced by a tar distillation device and modified asphalt produced by a kettle-type heating method are basically cooled by a falling film cooler.
The cooling process of the falling film cooler comprises the following steps: the hot asphalt before asphalt molding is sent to a falling film cooler, heat exchange is carried out between the hot asphalt and steam condensate in the falling film cooler to a required temperature (about 150 ℃), and then nitrogen is used as back pressure to be sent to a nozzle of an asphalt molding device in a pressing mode. The upper part of the asphalt falling film cooler is a downcomer liquid-liquid heat exchanger, the lower part of the asphalt falling film cooler is provided with an asphalt storage tank, downcomers in the downcomer liquid-liquid heat exchanger are fixed through an upper tube plate and a lower tube plate, hot asphalt is uniformly distributed on the upper tube plate through asphalt distribution tubes and then enters into each downcomer in a full-flow mode, a uniform liquid film is formed in each downcomer to flow downwards, and the uniform liquid film is collected into the asphalt storage tank at the lower part after reaching the required temperature through heat exchange with steam condensate of a shell side. The asphalt storage tank is kept at a certain liquid level, cooled asphalt is conveyed to a nozzle of the asphalt forming device through nitrogen back pressure, and vapor condensate after heat exchange vaporization is cooled in the vapor condenser through circulating cooling water and then returned to the downcomer liquid-liquid heat exchanger through a pump through the condensing water tank for recycling.
The asphalt falling film cooler is used as cooling equipment, and although the heat exchange effect is very good, some special problems need to be solved for cooling asphalt; because the viscosity of asphalt is rapidly increased along with the reduction of the temperature, the asphalt forms a film better when the temperature of the upper part of the downcomer is higher, and the viscosity of asphalt is rapidly increased along with the reduction of the cooling temperature, the flow speed is reduced, the film forming is gradually thickened, and the lower the temperature of a liquid film is, the heat exchange effect is reduced; whereas for pitch molding, the lower the temperature of cooling, the better the molding effect. Therefore, there is still an urgent need for improvement in the film forming effect of the conventional asphalt falling film cooler in terms of asphalt falling film cooling.
Disclosure of Invention
The invention provides a method and a device for cooling a gas forward circulation falling film, which improve the natural asphalt film forming mode of the existing asphalt falling film cooler, adopt circulating nitrogen to drive film forming liquid to flow downwards rapidly, provide auxiliary power for asphalt film forming, accelerate the flow rate of asphalt, thin and uniform film forming and greatly improve the heat exchange efficiency; along with the increase of the flow rate of the circulating nitrogen, the treatment capacity of the raw materials can be improved, and the operation flexibility of the equipment is greatly improved.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a nitrogen circulating fan is additionally arranged outside an asphalt falling film cooler, nitrogen serving as asphalt back pressure in a lower asphalt storage tank is returned to the top of an upper downcomer liquid-liquid heat exchanger, so that nitrogen filled in the asphalt falling film cooler flows in an accelerating mode along the asphalt flowing direction in the downcomer, circulating flow is realized through an external circulating nitrogen pipeline, the circulating nitrogen drives asphalt liquid to flow downwards rapidly, auxiliary power is provided for asphalt film forming, the asphalt flow speed is increased, film forming is thin and uniform, and meanwhile heat exchange efficiency is improved.
The asphalt is medium temperature asphalt or modified asphalt.
The gas forward circulation falling film cooling device comprises an asphalt falling film cooler consisting of an upper downcomer liquid-liquid heat exchanger and a lower asphalt storage tank; the downcomer in the downcomer liquid-liquid heat exchanger is fixed through an upper tube plate and a lower tube plate, and an asphalt distributing tube is arranged in the downcomer liquid-liquid heat exchanger above the downcomer; the top of the downcomer liquid-liquid heat exchanger is provided with a back pressure nitrogen inlet which is connected with a nitrogen source; and a circulating nitrogen inlet is formed in one side above the downcomer liquid-liquid heat exchanger, a circulating nitrogen outlet is formed in one side of the upper part of the asphalt storage tank, the circulating nitrogen outlet is connected with the circulating nitrogen inlet through an external circulating nitrogen pipeline, a nitrogen circulating fan and a flow recording interlocking instrument are sequentially arranged on the circulating nitrogen pipeline along the flowing direction of nitrogen, and the flow recording interlocking instrument and the nitrogen circulating fan are in interlocking control.
The nitrogen circulating fan is controlled by frequency conversion.
The circulating nitrogen inlets are uniformly arranged in a plurality along the circumferential direction of the downcomer liquid-liquid heat exchanger.
And the circulating nitrogen outlets are uniformly arranged in a plurality of circumferential directions of the asphalt storage tank.
Compared with the prior art, the invention has the beneficial effects that:
1) The nitrogen circulating fan is additionally arranged outside the asphalt film forming device, so that nitrogen circularly flows in the downcomer along the flowing direction of the asphalt liquid film, the circulating nitrogen drives the film forming liquid to rapidly flow downwards, auxiliary power is provided for asphalt film forming, the asphalt flow speed is accelerated, the film forming is thin and uniform, and the heat exchange efficiency is greatly improved;
2) Along with the increase of the flow rate of the circulating nitrogen, the treatment capacity of the raw materials can be improved, so that the operation elastic range of the asphalt falling film cooler is obviously improved;
3) After the nitrogen circulation function is added, the length of the downcomer can be further increased, the heat exchange area is increased, the final cooling temperature of asphalt is reduced, and asphalt molding is facilitated;
4) The method and the device have wide application range, and are suitable for asphalt and other viscous liquids.
Drawings
FIG. 1 is a schematic diagram of a cooling device for a gas forward circulation falling film according to the present invention.
In the figure: 1. asphalt falling film cooler 2, asphalt inlet 3, asphalt outlet 4, circulating nitrogen outlet 5, circulating nitrogen inlet 6, asphalt distributing pipe 7, upper pipe plate 8, lower pipe plate 9, downcomer 10, steam condenser 11, condensate tank 12, condensate pump 13, nitrogen circulating fan 14, asphalt heat exchanger 15, pressure regulating valve 16, liquid level regulating valve 17, nozzle LRC01, liquid level recording regulating meter FRC01, flow recording interlocking meter PRC01, pressure recording interlocking meter
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in figure 1, according to the gas forward circulation falling film cooling method, a nitrogen circulation fan 13 is additionally arranged outside an asphalt falling film cooler 1, nitrogen serving as asphalt back pressure in a lower asphalt storage tank is returned to the top of an upper downcomer liquid-liquid heat exchanger, so that nitrogen filled in the asphalt falling film cooler 1 flows in the asphalt flowing direction in a downcomer 9, circulation flow is realized through an external circulation nitrogen pipeline, the circulating nitrogen drives asphalt liquid to quickly flow downwards, auxiliary power is provided for asphalt film forming, the asphalt flow speed is increased, film forming is thin and uniform, and meanwhile, the heat exchange efficiency is improved.
The asphalt is medium temperature asphalt or modified asphalt.
The gas forward circulation falling film cooling device comprises an asphalt falling film cooler consisting of an upper downcomer liquid-liquid heat exchanger and a lower asphalt storage tank; the downcomer 9 in the downcomer liquid-liquid heat exchanger is fixed through an upper tube plate 7 and a lower tube plate 8, and an asphalt distributing tube 6 is arranged in the downcomer liquid-liquid heat exchanger above the downcomer 9; the top of the downcomer liquid-liquid heat exchanger is provided with a back pressure nitrogen inlet which is connected with a nitrogen source; a circulating nitrogen inlet 5 is formed in one side above the downcomer liquid-liquid heat exchanger, a circulating nitrogen outlet 4 is formed in one side above the asphalt storage tank, the circulating nitrogen outlet 4 is connected with the circulating nitrogen inlet 5 through an external circulating nitrogen pipeline, a nitrogen circulating fan 13 and a flow recording interlocking instrument FRC01 are sequentially arranged on the circulating nitrogen pipeline along the nitrogen flowing direction, and the flow recording interlocking instrument FRC01 and the nitrogen circulating fan 13 are in interlocking control.
The nitrogen circulating fan 13 adopts variable frequency control.
The circulating nitrogen inlets 5 are uniformly arranged in a plurality along the circumferential direction of the downcomer liquid-liquid heat exchanger.
And the circulating nitrogen outlet 4 is uniformly arranged in a plurality along the circumferential direction of the asphalt storage tank.
The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present invention, but the scope of the present invention is not limited to the following examples. The methods used in the examples described below are conventional methods unless otherwise specified.
[ example ]
In this embodiment, a method for cooling a gas by circulating a falling film is realized by the following manner:
the conventional asphalt falling film cooler 1 consists of an upper downcomer liquid-liquid heat exchanger and a lower asphalt storage tank, wherein the top of the downcomer liquid-liquid heat exchanger is provided with a back pressure nitrogen inlet and is connected with a nitrogen source through a nitrogen pipeline as shown in figure 1; the nitrogen pipeline is provided with a pressure recording interlocking instrument PRC01. A plurality of downcomers 9 are vertically arranged in the downcomer liquid-liquid heat exchanger, the upper ends of the downcomers 9 are fixed through an upper tube plate 7, and the lower ends of the downcomers 9 are fixed through a lower tube plate 8; an asphalt distribution pipe 6 is arranged in the downcomer liquid-liquid heat exchanger above the downcomer 9, an asphalt inlet 2 at one end of the asphalt distribution pipe 6 is connected with an asphalt inlet pipeline, and an asphalt heat exchanger 14 is arranged on the asphalt inlet pipeline. The lower part of the shell side of the downcomer liquid-liquid heat exchanger is provided with a steam condensate inlet, the upper part of the shell side is provided with a steam outlet, the steam outlet is connected with the steam condensate inlet through a circulating cooling pipeline, and a steam condenser 10, a condensate water tank 11 and a condensate water pump 12 are sequentially arranged on the circulating cooling pipeline along the gas and liquid flowing directions; the bottom of the asphalt storage tank is provided with an asphalt outlet 3, a plurality of nozzles 17 of the asphalt forming device are connected through asphalt outlet pipelines, the asphalt outlet pipelines are provided with a liquid level regulating valve 16 and a liquid level recording regulating instrument LRC01, and the liquid level regulating valve 16 and the liquid level recording regulating instrument LRC01 are controlled in an interlocking way.
The gas forward circulation falling film cooling device is structurally improved on the basis of the conventional asphalt falling film cooler, in the embodiment, a circulation nitrogen outlet 4 is arranged on one side of an asphalt storage tank above the asphalt liquid level, and a circulation nitrogen inlet 5 is arranged on the same side of the top space of a downcomer liquid-liquid heat exchanger above an asphalt distribution pipe 6. The circulating nitrogen outlet 4 is connected with the circulating nitrogen inlet 5 through a circulating nitrogen pipeline, a nitrogen circulating fan 13 and a flow recording interlocking instrument FRC01 are sequentially arranged on the circulating nitrogen pipeline, the flow recording interlocking instrument FRC01 is in interlocking control with the nitrogen circulating fan 13, and the nitrogen circulating fan 13 is in variable frequency control.
In the embodiment, nitrogen gas filled in the asphalt falling film cooler and serving as asphalt back pressure is pumped out from the lower asphalt storage tank by adding the nitrogen gas circulating fan 13 and then sent back to the downcomer liquid-liquid heat exchanger to realize the circulating flow of the nitrogen gas; circulating nitrogen enters from the top space of the downcomer liquid-liquid heat exchanger above the asphalt distribution pipe 6, flows in the downcomer 9 along the flowing direction of the asphalt liquid film under the action of a nitrogen circulating fan 13, drives the film forming liquid to flow downwards rapidly, provides auxiliary power for asphalt film forming, accelerates the asphalt liquid flow, thins and uniform film forming, and improves the heat exchange efficiency; the motor of the nitrogen circulating fan 13 is provided with a variable frequency controller to realize variable frequency control, and the thickness of the asphalt film is controlled by adjusting the flow rate of circulating nitrogen; with the increase of the flow rate of the circulating nitrogen, the treatment capacity of the asphalt can be improved, and the optimal heat exchange efficiency and the maximum treatment capacity can be adjusted according to the requirements.
The concrete process of asphalt cooling molding is as follows: the liquid asphalt exchanges heat with tar through an asphalt heat exchanger 14 at first, after a certain amount of heat is recovered, the liquid asphalt enters a downcomer liquid-liquid heat exchanger through an asphalt inlet 2, is distributed to an upper tube plate 7 through an asphalt distribution tube 6, the upper tube plate 7 serves as a liquid receiving disc, and the asphalt is uniformly distributed to all downcomers 9 in a full-flow mode; the asphalt forms a uniform liquid film in the downcomer 9 to flow downwards, is cooled to about 150 ℃ by heat exchange with steam condensate in the shell side, and is then collected in an asphalt storage tank at the lower part; the vaporized steam after heat exchange enters a steam condenser 10 to be condensed and cooled by circulating cooling water, then is sent to a condensation water tank 11, and is pumped back to the asphalt falling film cooler 1 by a condensation water pump 12 for heat exchange.
The top of the asphalt falling film cooler 1 is provided with a back pressure nitrogen inlet, the pressure of nitrogen with the pressure of 0.4MPa is regulated by a pressure regulating valve 15, and when a pressure recording interlocking instrument PRC01 shows that the pressure is 0.2MPa, the nitrogen enters the asphalt falling film cooler 1; nitrogen can be passed through downcomer 9 to the lower bitumen reservoir, filling the entire bitumen falling film cooler 1 and allowing cooled bitumen to flow out of bitumen outlet 3 as bitumen back pressure. The liquid level in the asphalt storage tank is kept constant by a liquid level regulating valve 16 arranged on an asphalt outlet pipe and a liquid level recording control instrument LRC01 arranged on the asphalt storage tank, and the liquid asphalt is sent to a plurality of nozzles 17 of the asphalt forming device through an asphalt outlet 3 by taking nitrogen back pressure as power.
In the embodiment, a nitrogen circulating fan 13 is arranged outside the asphalt falling film cooler 1, nitrogen which is fully filled in the asphalt and serves as asphalt back pressure is pumped out from a circulating nitrogen outlet 4 on an asphalt storage tank, and then the nitrogen is returned to the top of the asphalt falling film cooler 1 from a circulating nitrogen inlet 5, so that the nitrogen which is fully filled in the asphalt falling film cooler flows in a downcomer 9 in an accelerating way along the flowing direction of an asphalt liquid film, the circulating nitrogen drives film forming liquid to flow downwards rapidly, auxiliary power is provided for the film forming asphalt, the flow speed of the film forming asphalt is accelerated, the film forming is thin and uniform, and the heat exchange efficiency is improved; the nitrogen circulating fan 13 adopts variable frequency control, and controls the flow of circulating nitrogen through the flow record interlocking instrument FRC01 in an interlocking way, so as to control the thickness of asphalt film formation at the flow rate of the circulating nitrogen. As the nitrogen flow rate increases, the throughput of the bitumen can also be increased, and an optimum balance point between optimum heat exchange efficiency and maximum throughput is determined.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. A cooling method of a gas forward circulation falling film is characterized in that a nitrogen circulation fan is additionally arranged outside an asphalt falling film cooler, and nitrogen serving as asphalt back pressure in a lower asphalt storage tank is returned to the top of an upper downcomer liquid-liquid heat exchanger; the downcomer in the downcomer liquid-liquid heat exchanger is fixed through an upper tube plate and a lower tube plate, and an asphalt distributing tube is arranged in the downcomer liquid-liquid heat exchanger above the downcomer; the top of the downcomer liquid-liquid heat exchanger is provided with a back pressure nitrogen inlet which is connected with a nitrogen source; a circulating nitrogen inlet is arranged on one side above the downcomer liquid-liquid heat exchanger, a circulating nitrogen outlet is arranged on one side of the upper part of the asphalt storage tank, and the circulating nitrogen outlet is connected with the circulating nitrogen inlet through an external circulating nitrogen pipeline; the nitrogen filled in the asphalt falling film cooler flows in the downcomer along the asphalt flowing direction in an accelerating way, and the circulating flow is realized through an external circulating nitrogen pipeline, and the circulating flow nitrogen drives asphalt liquid to flow downwards rapidly, so that auxiliary power is provided for asphalt film formation.
2. The method for cooling a gas forward circulation falling film according to claim 1, wherein the asphalt is medium temperature asphalt or modified asphalt.
3. A gas forward circulation falling film cooling apparatus for carrying out the method of claim 1 or 2, comprising an upper downcomer liquid-liquid heat exchanger and a lower bitumen reservoir; the downcomer in the downcomer liquid-liquid heat exchanger is fixed through an upper tube plate and a lower tube plate, and an asphalt distributing tube is arranged in the downcomer liquid-liquid heat exchanger above the downcomer; the top of the downcomer liquid-liquid heat exchanger is provided with a back pressure nitrogen inlet which is connected with a nitrogen source; the device is characterized in that a circulating nitrogen inlet is formed in one side above the downcomer liquid-liquid heat exchanger, a circulating nitrogen outlet is formed in one side above the asphalt storage tank, the circulating nitrogen outlet is connected with the circulating nitrogen inlet through an external circulating nitrogen pipeline, a nitrogen circulating fan and a flow recording interlocking instrument are sequentially arranged on the circulating nitrogen pipeline along the nitrogen flowing direction, and the flow recording interlocking instrument is in interlocking control with the nitrogen circulating fan.
4. A gas forward circulation falling film cooling device according to claim 3, wherein the nitrogen circulation fan is controlled by frequency conversion.
5. A gas forward circulation falling film cooling device according to claim 3, wherein the circulating nitrogen inlet is uniformly provided in plurality along the circumferential direction of the downcomer liquid-liquid heat exchanger.
6. A gas forward circulation falling film cooling device according to claim 3, wherein the circulation nitrogen outlet is uniformly provided in plurality along the circumferential direction of the asphalt storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150653.3A CN111218295B (en) | 2020-03-06 | 2020-03-06 | Gas forward circulation falling film cooling method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150653.3A CN111218295B (en) | 2020-03-06 | 2020-03-06 | Gas forward circulation falling film cooling method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111218295A CN111218295A (en) | 2020-06-02 |
| CN111218295B true CN111218295B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010150653.3A Active CN111218295B (en) | 2020-03-06 | 2020-03-06 | Gas forward circulation falling film cooling method and device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5657880A (en) * | 1979-10-17 | 1981-05-20 | Nippon Tekko Renmei | Method and apparatus for gas circulation in vertical formed coke carbonization oven |
| WO2015009208A1 (en) * | 2013-07-18 | 2015-01-22 | Mnushkin Igor Anatol Evich | Method and apparatus for producing bitumen |
| CN106867558A (en) * | 2017-02-17 | 2017-06-20 | 湖北鑫固久技术装备有限公司 | Smokeless and low moisture asphalt moulding process units and technique |
| CN207608627U (en) * | 2017-12-26 | 2018-07-13 | 烟台银河新材料有限公司 | A kind of cooling back installation of gaseous phase deposition stove |
| CN110551513A (en) * | 2019-09-24 | 2019-12-10 | 中冶焦耐(大连)工程技术有限公司 | Multi-pipe-layer asphalt falling film cooler and asphalt cooling forming process applying same |
| CN211946912U (en) * | 2020-03-06 | 2020-11-17 | 中冶焦耐(大连)工程技术有限公司 | Gas is in same direction as circulation falling film cooling device |
-
2020
- 2020-03-06 CN CN202010150653.3A patent/CN111218295B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5657880A (en) * | 1979-10-17 | 1981-05-20 | Nippon Tekko Renmei | Method and apparatus for gas circulation in vertical formed coke carbonization oven |
| WO2015009208A1 (en) * | 2013-07-18 | 2015-01-22 | Mnushkin Igor Anatol Evich | Method and apparatus for producing bitumen |
| CN106867558A (en) * | 2017-02-17 | 2017-06-20 | 湖北鑫固久技术装备有限公司 | Smokeless and low moisture asphalt moulding process units and technique |
| CN207608627U (en) * | 2017-12-26 | 2018-07-13 | 烟台银河新材料有限公司 | A kind of cooling back installation of gaseous phase deposition stove |
| CN110551513A (en) * | 2019-09-24 | 2019-12-10 | 中冶焦耐(大连)工程技术有限公司 | Multi-pipe-layer asphalt falling film cooler and asphalt cooling forming process applying same |
| CN211946912U (en) * | 2020-03-06 | 2020-11-17 | 中冶焦耐(大连)工程技术有限公司 | Gas is in same direction as circulation falling film cooling device |
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|---|---|
| CN111218295A (en) | 2020-06-02 |
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