CN211041883U - Novel asphalt falling film cooler - Google Patents
Novel asphalt falling film cooler Download PDFInfo
- Publication number
- CN211041883U CN211041883U CN201921867615.9U CN201921867615U CN211041883U CN 211041883 U CN211041883 U CN 211041883U CN 201921867615 U CN201921867615 U CN 201921867615U CN 211041883 U CN211041883 U CN 211041883U
- Authority
- CN
- China
- Prior art keywords
- liquid
- downcomer
- asphalt
- thickness adjusting
- film thickness
- Prior art date
- 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.)
- Withdrawn - After Issue
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 110
- 239000011552 falling film Substances 0.000 title claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 111
- 239000010408 film Substances 0.000 claims abstract description 58
- 238000003860 storage Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 16
- 238000009434 installation Methods 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000011269 tar Substances 0.000 description 4
- 239000011280 coal tar Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 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
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011883 electrode binding agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011331 needle coke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to a novel asphalt falling film cooler, wherein the upper end of a downcomer in the falling film cooler extends to the upper part of an upper tube plate, and the upper end of the downcomer is provided with an upward enlarged bell mouth; liquid film thickness adjusting pipes are arranged above the downcomer and are in one-to-one correspondence with the downcomer, the lower ends of the liquid film thickness adjusting pipes extend into the bell mouths for a distance, and annular gaps are formed between the extending sections and the bell mouths and are channels for asphalt to flow into the downcomer; the height of the liquid film thickness adjusting pipe can be adjusted, and the width of the annular gap is changed after the height of the liquid film thickness adjusting pipe is adjusted. The utility model discloses a receive liquid film-forming mode to improve pitch falling liquid film cooler, solved pitch falling liquid film cooler installation degree of difficulty big and the narrow difficult problem of bringing for process design and operation of elasticity scope, make process system simplify more to guarantee the permanent, smooth and easy operation of system.
Description
Technical Field
The utility model relates to a pitch production and deep-processing technical field especially relate to a novel pitch falling liquid film cooler.
Background
About 50 to 60 percent of medium temperature pitch is generally generated in the coal tar processing process, belongs to a bulk product of tar processing, and modified pitch is a main downstream product of the current medium temperature pitch and is mainly used for producing prebaked anodes in the electrolytic aluminum industry and preparing battery rods or electrode binders.
The medium temperature asphalt and modified asphalt products produced in China can be liquid asphalt loaded by liquid or solid asphalt prepared by an asphalt solidification cooling forming process, but regardless of the form, the produced hot asphalt (medium temperature asphalt or modified asphalt) needs to be cooled to medium temperature liquid asphalt suitable for storage or low temperature liquid asphalt for solidification forming.
The medium temperature pitch produced by the tar distillation device and the modified pitch produced by the medium temperature pitch through a kettle type heating method at present basically adopt an pitch falling film cooler as cooling equipment, and the cooling process comprises the following steps: the hot asphalt is sent to a falling film cooler before being sent to an asphalt storage tank or an asphalt forming device, and then is subjected to heat exchange with steam condensate in the falling film cooler to reach the required temperature, and then is sent to the asphalt storage tank or a nozzle of the asphalt forming device under the pressure of nitrogen. The specific process is as follows: the asphalt falling film cooler used at present is provided with a liquid-liquid heat exchanger of a liquid-falling pipe at the upper part and an asphalt storage tank at the lower part, the downcomer of the liquid-liquid heat exchanger of the liquid-falling pipe at the upper part is fixed by an upper fixed tube plate and a lower tube plate, hot asphalt is uniformly distributed on the upper fixed tube plate through an asphalt distribution pipe and enters each downcomer in a full flow mode, a uniform liquid film is formed in the downcomer and flows downwards, and the hot asphalt is collected into the asphalt storage tank at the lower part after reaching the required temperature through heat exchange with a steam condensate of a shell pass; the asphalt storage tank is kept at a certain liquid level, then the asphalt storage tank or a nozzle of an asphalt forming device is pumped to the asphalt storage tank or the nozzle of the asphalt forming device through nitrogen back pressure, and vaporized steam condensate is cooled by circulating cooling water in a steam condenser and then is returned to a falling film cooler through a condensate water tank by a pump.
The asphalt falling film cooler is used as cooling equipment, and although the heat exchange effect is very good, some unexpected problems are exposed in the actual use process and are difficult to overcome; firstly, the levelness requirement on the installation of an upper tube plate of a falling film cooler is very high, and a slightly inclined downcomer can generate bias flow to form an uneven liquid film, so that the heat exchange effect is very poor; secondly, the operational flexibility of the tar distillation device is 60-120%, when the flow rate of asphalt treated by the asphalt falling film cooler is reduced to about 80% of the normal flow rate, the heat exchange efficiency is reduced sharply, when the asphalt flows to the downcomer in a full state, if the flow rate does not meet the requirement, a uniform liquid film cannot be formed in the downcomer, even bias flow is generated, and the purpose of heat exchange cannot be achieved, namely the requirement of the lower limit of 60% of the design operational flexibility cannot be achieved at all, even 80% cannot be achieved; in order to achieve the requirement of 120% upper limit of the operation flexibility, the design throughput is generally large, so that the lower limit of the operation flexibility is more difficult to meet the requirement.
About 50% -60% of medium-temperature asphalt is generated in the coal tar processing process, the medium-temperature asphalt belongs to a bulk product of tar processing, the larger the processing scale is, the more the asphalt yield is, the modified asphalt is a main downstream product of the existing asphalt, in addition, the asphalt coke, needle coke and the like are also downstream products of the medium-temperature asphalt, if the products are processed simultaneously, the range of the requirement on the operation elasticity of asphalt cooling equipment is wider and wider, the treatment capacity is not limited to 60-120% of the design scale, the asphalt falling film cooler with the existing structure can not meet the requirement at all, the problem can be solved only by a combination mode of a plurality of asphalt falling film coolers, and thus, a large amount of occupied land is wasted, and the investment cost is increased greatly.
Disclosure of Invention
The utility model provides a novel pitch falling liquid film cooler, the mode that receives liquid film-forming to pitch falling liquid film cooler improves, liquid pitch sends to and gets into the downcomer through the full flow and the mode of forcing the film-forming after the tube sheet, avoid because the condition that the tube sheet levelness is not good or flow reduces to lead to liquid pitch bias flow not to become the film takes place, the difficult problem of bringing for process design and operation that the big and operation elasticity scope of pitch falling liquid film cooler installation degree of difficulty is narrow has been solved, make process system simplify more, and the assurance system is permanent, smooth and easy operation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel asphalt falling film cooler comprises a falling film cooler, wherein the falling film cooler consists of a liquid-liquid heat exchanger of a falling liquid pipe arranged at the upper part and an asphalt storage tank arranged at the lower part; a plurality of downcomers are vertically arranged in the downcomer liquid-liquid heat exchanger, and two ends of each downcomer are fixed through an upper tube plate and a lower tube plate respectively; the upper end of the downcomer extends to the upper part of the upper tube plate, and the upper end of the downcomer is provided with an upward-expanding bell mouth; liquid film thickness adjusting pipes are arranged above the downcomer and are in one-to-one correspondence with the downcomer, the lower ends of the liquid film thickness adjusting pipes extend into the bell mouths for a distance, and annular gaps are formed between the extending sections and the bell mouths and are channels for asphalt to flow into the downcomer; the height of the liquid film thickness adjusting pipe can be adjusted, and the width of the annular gap is changed after the height of the liquid film thickness adjusting pipe is adjusted.
The upper end of the liquid film thickness adjusting pipe is fixedly connected with a horizontally arranged fixed plate, a plurality of fixed supports are arranged in the barrel of the liquid-liquid heat exchanger of the liquid descending pipe along the circumferential direction, the fixed plate is connected with the fixed supports through guide bolts, gaps are reserved at the joints of the fixed plate and the fixed supports, the fixed plate can move along with the fixed plate in the gap range when the liquid level of asphalt fluctuates, and two ends of each guide bolt are locked through nuts.
The downcomer liquid-liquid heat exchanger is divided into a plurality of areas along the horizontal direction, and the distances from the downcomer corresponding to each area to the upper tube plate are different, namely, the heights of the upper edges of bell mouths of the downcomers in different areas have height differences; the lengths of the liquid film thickness adjusting pipes in different areas are matched with the height of the bell mouth of the downcomer in the corresponding area.
And a gap is reserved between the outer side edge of the fixed plate and the inner wall of the barrel of the liquid-liquid heat exchanger of the down-flow pipe.
The top end of the liquid film thickness adjusting pipe penetrates through the fixing plate, and the upper surface of the liquid film thickness adjusting pipe is flush with the upper surface of the fixing plate.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the liquid-receiving film-forming mode of the existing asphalt falling film cooler is improved, after liquid asphalt is distributed to the upper tube plate, the liquid asphalt enters the downcomer in a full-flow and forced film-forming mode, the situation that the liquid asphalt is deflected and does not form a film due to poor levelness of the upper tube plate is avoided, and the problem that construction difficulty is increased due to high requirement on installation levelness of the existing asphalt falling film cooler is solved.
2) The downcomer is divided into a plurality of areas, the bell mouth elevation of each area downcomer is provided with a certain elevation difference, when the treatment capacity of the downcomer with low elevation cannot meet the requirement, the full asphalt liquid level is increased, and the downcomers with high elevation are sequentially and automatically put into operation, so that the defect that the operation elasticity of the existing asphalt falling film cooler is too narrow is solved, the problem of operation elasticity can be solved only by adopting the combined design of a plurality of asphalt falling film coolers, the design is simplified, the occupied area of equipment is saved, and the investment and the operation cost of the equipment are saved.
3) When the asphalt treatment capacity can not meet the requirement after all the downcomers are put into operation, the asphalt liquid surface gradually moves upwards until the whole liquid receiving cavity is filled with asphalt, at the moment, the fixed plate is pressed to move upwards to drive the liquid film thickness adjusting pipe to move upwards, the film forming thickness is increased until the required treatment capacity is reached through widening of the annular gap, and the operation elasticity range is obviously improved.
Drawings
Fig. 1 is a schematic structural diagram of a novel asphalt falling film cooler of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
In the figure: 1. falling film cooler 2, asphalt inlet pipe 3, downcomer 4, bell mouth 5, liquid film thickness adjusting pipe 6, fixing support 7, guide bolt 8, fixing plate 9, upper pipe plate 10, lower pipe plate 11, asphalt outlet pipe 12, steam condenser 13, condensate water tank 14 and condensate water pump
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the novel asphalt falling film cooler of the present invention comprises a falling film cooler 1, wherein the falling film cooler 1 is composed of a liquid-liquid heat exchanger of a liquid falling pipe arranged at the upper part and an asphalt storage tank arranged at the lower part; a plurality of downcomers 3 are vertically arranged in the downcomer liquid-liquid heat exchanger, and two ends of each downcomer 3 are fixed through an upper tube plate 9 and a lower tube plate 10 respectively; the upper end of the downcomer 3 extends to the upper part of the upper tube plate 9, and the upper end of the downcomer 3 is provided with an upward-expanding bell mouth 4; a liquid film thickness adjusting pipe 5 is arranged above the downcomer 3, the liquid film thickness adjusting pipes 5 and the downcomer 3 are arranged in a one-to-one correspondence mode, the lower end of each liquid film thickness adjusting pipe 5 extends into the bell mouth 4 for a certain distance, an annular gap is formed between each extending section and the bell mouth 4, and the annular gap is a channel for asphalt to flow into the downcomer 3; the height of the liquid film thickness adjusting pipe 5 can be adjusted, and the width of the annular gap is changed after the height is adjusted.
The upper end of the liquid film thickness adjusting pipe 5 is fixedly connected with a horizontally arranged fixed plate 8, a plurality of fixed supports 6 are arranged in the barrel of the liquid-liquid heat exchanger of the liquid descending pipe along the circumferential direction, the fixed plate 8 is connected with the fixed supports 6 through guide bolts 7, gaps are reserved at the joints of the fixed plate 8 and the fixed supports 6, the fixed plate 8 can move along with the fixed plate in the gap range when the liquid level of the asphalt fluctuates, and two ends of the guide bolts 7 are locked through nuts respectively.
The downcomer liquid-liquid heat exchanger is divided into a plurality of areas along the horizontal direction, and the distances from the downcomer 3 corresponding to each area to the upper tube plate 9 are different, namely, the heights of the upper edges of bell mouths 4 of the downcomers 3 in different areas have height differences; the lengths of the liquid film thickness adjusting pipes 5 in different areas are matched with the height of the bell mouth 4 of the down-flow pipe 3 in the corresponding area.
And a gap is reserved between the outer side edge of the fixed plate 8 and the inner wall of the barrel of the liquid-liquid heat exchanger of the down-flow pipe.
The top end of the liquid film thickness adjusting pipe 5 penetrates through the fixing plate 8, and the upper surface of the liquid film thickness adjusting pipe 5 is flush with the upper surface of the fixing plate 8.
The liquid-receiving film-forming method of the novel asphalt falling film cooler comprises the following steps:
the hot asphalt is uniformly distributed on the upper tube plate 9 through the asphalt distribution tube, and passes through an annular gap between the bell mouth 4 of the downcomer 3 and the liquid film thickness adjusting tube 5 in a full flow mode to form uniform liquid films which enter each downcomer 3 and flow downwards along the downcomer 3;
dividing the downcomer 3 into a plurality of regions, wherein the heights of the upper edges of bell mouths 4 corresponding to the downcomers 3 in each region are different, asphalt firstly flows down through the downcomer 3 in the region with lower height of the upper edge of the bell mouth 4, when the asphalt treatment capacity of the region can not meet the requirement, the full flow liquid level of the asphalt is increased, and the downcomers 3 in the region with higher height of the upper edge of the bell mouth 4 are sequentially and automatically put into operation;
when the asphalt treatment capacity can not meet the requirement after all the downcomers 3 in all the areas are put into operation, the asphalt liquid surface gradually moves upwards until the whole liquid receiving cavity is filled with the asphalt liquid, and the fixing plate 8 moves upwards along with the asphalt liquid surface to drive the liquid film thickness adjusting pipe 5 to move upwards so as to increase the width of the annular gap until the asphalt treatment capacity meets the requirement; when the fixed plate 8 moves upward, the asphalt in the gap outside the fixed plate 8 flows onto the fixed plate 8 and then flows into the downcomer 3 along the liquid film thickness adjusting pipe 5.
The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
[ examples ] A method for producing a compound
In the embodiment, a novel asphalt falling film cooler 1 is improved in structure on the basis of the existing asphalt falling film cooler.
The upper end of each downcomer 3 is provided with a bell mouth 4, a liquid film thickness adjusting pipe 5 is arranged above the bell mouth 4, the lower end of the liquid film thickness adjusting pipe 5 extends into the corresponding bell mouth 4 for a certain distance, and an annular gap with a certain width is reserved between the extending section and the pipe wall of the bell mouth 4, and the annular gap is a channel for liquid asphalt to flow into the downcomer 3. When liquid asphalt enters the downcomer 3 in a full flow mode, the liquid asphalt can only enter through the annular gap, and the liquid asphalt flowing into the downcomer 3 is forced to form a liquid film to flow downwards due to the limitation of the annular gap on the flow. After the liquid film forming mode is adopted, compared with the existing falling film cooler, the levelness requirement on the upper tube plate 9 is not high, so that the construction difficulty is reduced.
In order to improve the operation flexibility of the falling film cooler 1 for processing raw materials, the whole downcomers 3 are divided into 2 areas, and the height of the bell mouths 4 of the downcomers 3 corresponding to the 2 areas is provided with a height difference. When the treatment capacity of the downcomer 3 in the low elevation area can not meet the requirement, the full liquid level is increased, and the downcomer 3 in the high elevation area is automatically put into operation.
The liquid film thickness adjusting pipes 5 are uniformly fixed on a fixing plate 8 which is horizontally arranged and can slightly move along the vertical direction along the guide bolt 7, when the fixing plate 8 is not pressed, the bottom surface of the fixing plate is contacted with the upper surface of the fixing support 6, and the fixing support 6 bears the weight of the fixing plate 8 and the liquid film thickness adjusting pipes 5. When the asphalt treatment capacity can not meet the requirement after all the downcomers 3 in all the areas are put into operation, the asphalt liquid surface gradually moves upwards until the whole liquid receiving cavity is filled with the asphalt liquid, the fixed plate 8 moves upwards along the guide bolt 7 after being pressed, and the liquid film thickness adjusting pipe 5 is driven to move upwards to widen the annular gap until the required treatment capacity is reached.
A certain gap is left between the periphery of the fixing plate 8 and the inner wall of the cylinder body of the pitch falling film cooler 1 so that the fixing plate 8 moves upwards.
The top end of the liquid film thickness adjusting pipe 5 passes through the fixing plate 8, and the upper surface of the liquid film thickness adjusting pipe is kept flat with the upper surface of the fixing plate 8, when the fixing plate 8 is pressed to move upwards, the liquid asphalt leaking upwards from the gap at the periphery of the fixing plate 8 flows onto the fixing plate 8, and then flows back to the downcomer pipe 3 through the liquid film thickness adjusting pipe 5.
This embodiment novel pitch falling film cooler can realize all functions of current pitch falling film cooler, has only reduced the degree of difficulty of installation through structural improvement, has increased the elasticity of operation of equipment, and pitch cooling process based on it does not basically change, and its process is as follows:
the external hot asphalt is sent to the upper tube plate 9 through the asphalt inlet pipe 2 and enters each downcomer 3 in a full flow mode, a uniform liquid film flows downwards in the downcomers 3, and the external hot asphalt is collected into an asphalt storage tank at the lower part after reaching the required temperature through heat exchange with the vapor condensate of the shell pass, the asphalt storage tank is kept at a certain liquid level, and then the external hot asphalt is pressurized and sent to an asphalt storage tank or an asphalt forming device through an asphalt outlet pipe 11 through nitrogen backpressure (nitrogen introduced from the top reaches the asphalt storage tank at the lower part through a liquid film thickness adjusting pipe 5 and the downcomer 3), and the vaporized vapor condensate is cooled through circulating cooling water in a vapor condenser 12 and then sent back to the falling film cooler 1 through a condensate water tank 13 and a condensate water pump 14.
The novel asphalt falling film cooler can be used for cooling medium temperature asphalt, modified asphalt or other chemical raw materials with similar properties.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A novel asphalt falling film cooler comprises a falling film cooler, wherein the falling film cooler consists of a liquid-liquid heat exchanger of a falling liquid pipe arranged at the upper part and an asphalt storage tank arranged at the lower part; a plurality of downcomers are vertically arranged in the downcomer liquid-liquid heat exchanger, and two ends of each downcomer are fixed through an upper tube plate and a lower tube plate respectively; the upper end of the downcomer extends to the upper part of the upper tube plate, and the upper end of the downcomer is provided with an upward-expanding bell mouth; liquid film thickness adjusting pipes are arranged above the downcomer and are in one-to-one correspondence with the downcomer, the lower ends of the liquid film thickness adjusting pipes extend into the bell mouths for a distance, and annular gaps are formed between the extending sections and the bell mouths and are channels for asphalt to flow into the downcomer; the height of the liquid film thickness adjusting pipe can be adjusted, and the width of the annular gap is changed after the height of the liquid film thickness adjusting pipe is adjusted.
2. The novel asphalt falling film cooler as claimed in claim 1, wherein the upper end of the liquid film thickness adjusting pipe is fixedly connected with a horizontally arranged fixing plate, a plurality of fixing brackets are circumferentially arranged in the barrel of the downcomer liquid-liquid heat exchanger, the fixing plate is connected with the fixing brackets through guide bolts, a gap is left at the joint of the fixing plate and the fixing brackets, so that the fixing plate can move along with the asphalt liquid level in the gap range when the asphalt liquid level fluctuates, and the two ends of the guide bolts are respectively locked through nuts.
3. The novel asphalt falling film cooler according to claim 1, wherein the downcomer liquid-liquid heat exchanger is divided into a plurality of areas along the horizontal direction, and the downcomer corresponding to each area extends out of the upper tube plate at different distances, namely, the height difference is formed between the upper edges of the bell mouths of the downcomers in different areas; the lengths of the liquid film thickness adjusting pipes in different areas are matched with the height of the bell mouth of the downcomer in the corresponding area.
4. A new asphalt falling film cooler according to claim 2, wherein a gap is left between the outer edge of the fixed plate and the inner wall of the cylinder of the downcomer liquid-liquid heat exchanger.
5. The new asphalt falling film cooler according to claim 2, wherein the top end of the liquid film thickness adjusting tube passes through the fixed plate, and the upper surface of the liquid film thickness adjusting tube is flush with the upper surface of the fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921867615.9U CN211041883U (en) | 2019-11-01 | 2019-11-01 | Novel asphalt falling film cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921867615.9U CN211041883U (en) | 2019-11-01 | 2019-11-01 | Novel asphalt falling film cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211041883U true CN211041883U (en) | 2020-07-17 |
Family
ID=71538722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921867615.9U Withdrawn - After Issue CN211041883U (en) | 2019-11-01 | 2019-11-01 | Novel asphalt falling film cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211041883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686529A (en) * | 2019-11-01 | 2020-01-14 | 中冶焦耐(大连)工程技术有限公司 | Novel asphalt falling film cooler and liquid-receiving film-forming method thereof |
-
2019
- 2019-11-01 CN CN201921867615.9U patent/CN211041883U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686529A (en) * | 2019-11-01 | 2020-01-14 | 中冶焦耐(大连)工程技术有限公司 | Novel asphalt falling film cooler and liquid-receiving film-forming method thereof |
| CN110686529B (en) * | 2019-11-01 | 2024-01-16 | 中冶焦耐(大连)工程技术有限公司 | Novel asphalt falling film cooler and liquid-receiving film forming method thereof |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200717 Effective date of abandoning: 20240116 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200717 Effective date of abandoning: 20240116 |