CN210340782U - Asphalt falling film cooler and asphalt cooling forming system - Google Patents
Asphalt falling film cooler and asphalt cooling forming system Download PDFInfo
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- CN210340782U CN210340782U CN201921145311.1U CN201921145311U CN210340782U CN 210340782 U CN210340782 U CN 210340782U CN 201921145311 U CN201921145311 U CN 201921145311U CN 210340782 U CN210340782 U CN 210340782U
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Abstract
The utility model relates to an asphalt falling film cooler and an asphalt cooling and forming system, wherein the asphalt falling film cooler comprises a downcomer liquid-liquid heat exchanger arranged at the upper part and an asphalt storage tank arranged at the lower part, and a plurality of downcomers in the downcomer liquid-liquid heat exchanger are fixed through an upper tube plate and a lower tube plate; the top of going up the tube sheet establishes the baffle and separates the headspace of going up the tube sheet for 2 ~ 4 liquid districts, and the pitch falling liquid film cooler top that corresponds every liquid district is established pitch entry takeover respectively, and each pitch entry takeover extends to falling liquid film cooler center respectively, and the bottom of every pitch entry takeover all is equipped with a plurality of pitch distribution pipes along vertically. The utility model discloses an add the baffle in the last tube sheet department of pitch falling liquid film cooler and carry out the subregion, make up the operation or single operation according to the feedstock treatment volume in every branch liquid district, successfully solved pitch falling liquid film cooler operation elasticity narrow difficult problem, simplified the design, saved equipment area, investment cost and running cost.
Description
Technical Field
The utility model relates to an asphalt production and deep-processing technical field especially relate to an asphalt falling film cooler and pitch cooling molding system.
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, preparing battery rods or electrode binders in the electrolytic aluminum industry.
The medium temperature asphalt and modified asphalt products produced in China can be sold in a liquid loading mode or in a solid mode of asphalt solidification and cooling molding, but in any mode, the produced hot asphalt (medium temperature asphalt or modified asphalt) needs to be cooled into medium temperature liquid asphalt suitable for storage or low temperature liquid asphalt suitable for solidification and molding.
At present, medium-temperature asphalt produced by a tar distillation device and modified asphalt produced by the medium-temperature asphalt through a kettle type heating method basically adopt an asphalt 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.
Although the asphalt falling film cooler is used as cooling equipment, the heat exchange effect is very good, but an unexpected problem exists in the actual use process, namely; the operating 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 rapidly reduced, 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 lower limit requirement of 60% of the designed operating flexibility (actually even 80% cannot be achieved), and in order to meet the upper limit requirement of 120% of the operating flexibility, the designed treatment capacity is generally larger, so that the lower limit of the operating flexibility is higher, and the use requirement is more difficult to meet.
The larger the coal tar processing scale is, the more the medium temperature pitch yield is, the modified pitch is the main downstream product of the medium temperature pitch at present, and in addition, pitch coke, needle coke and the like are also downstream products of the medium temperature pitch, if the products are processed simultaneously, the requirement range of the operational flexibility of pitch cooling equipment is wide, the product is not limited to 60-120% of the treatment capacity of the design scale, but the pitch falling film cooler with the existing structure cannot meet the current use requirement, and can only be solved by the mode of combining a plurality of pitch falling film coolers, so that a large amount of occupied land and investment are wasted.
Disclosure of Invention
The utility model provides a pitch falling liquid film cooler and pitch cooling molding system adds the baffle through the last tube sheet department at pitch falling liquid film cooler and carries out the subregion, makes up operation or single operation according to the raw materials handling capacity in every branch liquid district, has successfully solved the pitch falling liquid film cooler and has operated the too narrow difficult problem of elasticity, has simplified the design, has saved equipment area, investment cost and running cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an asphalt falling film cooler comprises a downcomer liquid-liquid heat exchanger arranged at the upper part and an asphalt storage tank arranged at the lower part, wherein a plurality of downcomers in the downcomer liquid-liquid heat exchanger are fixed through an upper tube plate and a lower tube plate; the top of the asphalt falling film cooler is provided with an asphalt inlet connecting pipe, and the bottom of the asphalt falling film cooler is provided with an asphalt outlet; the top of going up the tube sheet establishes the baffle and separates the headspace of going up the tube sheet for 2 ~ 4 liquid districts, and the pitch inlet takeover is established respectively to the pitch falling film cooler top that corresponds every liquid district, and each pitch inlet takeover extends to falling film cooler center respectively, and the bottom of every pitch inlet takeover all is equipped with a plurality of pitch distribution pipes along vertically.
An asphalt cooling and forming system comprises an asphalt falling film cooler, a steam condenser, a condensed water tank, a condensed water pump and a former nozzle; the top of the asphalt falling film cooler is provided with a nitrogen inlet, n asphalt inlet connecting pipes are respectively connected with a liquid asphalt inlet header pipe through asphalt inlet branch pipes, and n is 2-4, and the lower part is the same as the upper part; a flow recording instrument is arranged on the asphalt inlet main pipe, a flow regulating valve I is arranged on each asphalt inlet branch pipe, wherein a flow recording regulating instrument I is arranged on n-1 asphalt inlet branch pipes, and the flow regulating valve I is connected with the flow recording regulating instrument I through a control cable; a steam outlet is arranged at the upper part of the shell side of the downcomer liquid-liquid heat exchanger, a steam condensate inlet is arranged at the lower part of the downcomer liquid-liquid heat exchanger, the steam outlet is connected with the steam condensate inlet through an external circulating pipeline, and a steam condenser, a condensate water tank and a condensate water pump are sequentially arranged on the external circulating pipeline along the flowing direction of the medium in the tube; the bottom of the asphalt storage tank is connected with n asphalt outlet branch pipes through an asphalt outlet main pipe, and the tail ends of the asphalt outlet branch pipes are respectively connected into a shaper nozzle; a liquid level recording and adjusting instrument is arranged on the asphalt storage tank, a flow adjusting valve II is arranged on the asphalt outlet main pipe, and the liquid level recording and adjusting instrument is connected with the flow adjusting valve II through a control cable; and a third flow regulating valve is respectively arranged on each asphalt outlet branch pipe, wherein a second flow recording and regulating instrument is arranged on n-1 asphalt outlet branch pipes, and the third flow regulating valve is connected with the second flow recording and regulating instrument through a control cable.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the partition plates are additionally arranged at the upper tube plates of the asphalt falling film coolers to partition the liquid receiving disc, and the combined operation or the single operation is carried out according to the raw material treatment capacity of each liquid partition area, so that the problem that the operation elasticity of the asphalt falling film coolers is too narrow is successfully solved, and compared with the original scheme of needing the combined operation of a plurality of asphalt falling film coolers, the design is simplified, and the occupied area of equipment, the investment cost and the operation cost are saved;
2) adopt behind the scheme, the operation elasticity scope of pitch falling liquid film cooler is showing and is improving, to pitch cooling shaping system, the former nozzle is also grouped according to the operation elasticity scope of pitch falling liquid film cooler and the operating parameter of nozzle itself, has changed the current situation that one set of nozzle of original pitch former corresponds all operational loads, has avoided pitch shaping product thickness inequality, cooling effect condition when good bad to take place.
Drawings
Fig. 1 is a schematic structural diagram of an asphalt falling film cooler according to the present invention.
Figure 2 is the top tube sheet top space establishes 2 minute liquid district's schematic diagram.
Fig. 3 is a schematic diagram of the top space of the upper tube plate of the present invention having 3 liquid distribution areas.
Figure 4 is the top space of the upper tube plate of the utility model is provided with 4 liquid separating areas.
Fig. 5 is a schematic structural diagram of an asphalt cooling molding system according to the present invention.
In the figure: 1. asphalt falling film cooler 2, asphalt inlet connecting pipe 3, partition plate 4, asphalt distribution pipe 5, downcomer 6, upper pipe plate 7, lower pipe plate 8, asphalt outlet 9, steam condenser 10, condensate water tank 11, condensate water pump 12, flow regulating valve I13, flow regulating valve II 14, flow regulating valve III 15, former nozzle FR01, flow recording and adjusting instrument FRC02, flow recording and adjusting instrument FRC03, flow recording and adjusting instrument LRC01 and liquid level recording and adjusting instrument FRC01
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, the asphalt falling film cooler of the present invention comprises a downcomer liquid-liquid heat exchanger disposed at the upper portion and an asphalt storage tank disposed at the lower portion, wherein a plurality of downcomers 5 in the downcomer liquid-liquid heat exchanger are fixed by an upper tube plate 6 and a lower tube plate 7; the top of the asphalt falling film cooler 1 is provided with an asphalt inlet connecting pipe 2, and the bottom is provided with an asphalt outlet 8; the top of the upper tube plate 6 is provided with a partition plate 3 to divide the top space of the upper tube plate 6 into 2-4 liquid distribution areas (as shown in fig. 2-4), the top of the asphalt falling film cooler 1 corresponding to each liquid distribution area is provided with asphalt inlet connecting tubes 2, each asphalt inlet connecting tube 2 extends towards the center of the falling film cooler 1, and the bottom of each asphalt inlet connecting tube 2 is provided with a plurality of asphalt distribution tubes 4 along the longitudinal direction.
As shown in fig. 5, the asphalt cooling molding system of the present invention includes an asphalt falling film cooler 1, a steam condenser 9, a condensed water tank 10, a condensed water pump 11 and a former nozzle 15; the top of the asphalt falling film cooler 1 is provided with a nitrogen inlet, n asphalt inlet connecting pipes 2 are respectively connected with a liquid asphalt inlet header pipe through asphalt inlet branch pipes, and n is 2-4, and the lower part is the same; a flow recording instrument FR01 is arranged on the asphalt inlet main pipe, a flow regulating valve I12 is respectively arranged on each asphalt inlet branch pipe, wherein a flow recording regulating instrument FRC02 is arranged on n-1 asphalt inlet branch pipes, and the flow regulating valve I12 is connected with the flow recording regulating instrument FRC02 through a control cable; a steam outlet is arranged at the upper part of the shell side of the liquid-liquid heat exchanger of the downcomer, a steam condensate inlet is arranged at the lower part of the liquid-liquid heat exchanger of the downcomer, the steam outlet is connected with the steam condensate inlet through an external circulating pipeline, and a steam condenser 9, a condensate water tank 10 and a condensate water pump 11 are sequentially arranged on the external circulating pipeline along the flowing direction of the medium in the downcomer; the bottom of the asphalt storage tank is connected with n asphalt outlet branch pipes through an asphalt outlet main pipe, and the tail ends of the asphalt outlet branch pipes are respectively connected with a former nozzle 15; a liquid level recording and adjusting instrument LRC01 is arranged on the asphalt storage tank, a flow regulating valve II 13 is arranged on an asphalt outlet header pipe, and the liquid level recording and adjusting instrument LRC01 is connected with the flow regulating valve II 13 through a control cable; and a flow regulating valve III 14 is respectively arranged on each asphalt outlet branch pipe, wherein a flow recording and regulating instrument II FRC03 is arranged on n-1 asphalt outlet branch pipes, and the flow regulating valve III 14 is connected with the flow recording and regulating instrument II FRC03 through a control cable.
As shown in fig. 5, the process of the asphalt cooling molding system of the present invention is as follows:
1) liquid asphalt conveyed by an asphalt inlet main pipe enters an asphalt falling film cooler 1 in n paths through an asphalt inlet branch pipe and a corresponding asphalt inlet connecting pipe 2, wherein n is 2-4, and the same applies below; the upper tube plate 6 is equivalent to a liquid receiving disc and is divided into n liquid separating areas by the partition plates 3; the total flow of liquid asphalt is measured and recorded through a flow recording instrument FR01 arranged on an asphalt inlet main pipe, and then the flow of asphalt displayed on an asphalt recording and adjusting instrument FRC02 on an n-1-way asphalt inlet connecting pipe 2 is enabled to be equal to 1/n of the flow of asphalt displayed on a flow recording instrument FR01 on the asphalt inlet main pipe through the matching adjustment of flow adjusting valves I12 arranged on n-way asphalt inlet branch pipes, namely the equal amount of asphalt entering n liquid separation areas is ensured;
2) liquid asphalt is uniformly distributed on an upper pipe plate 6 through a plurality of asphalt distribution pipes 4 arranged on an asphalt inlet connecting pipe 2, and enters each downcomer 5 in a full flow mode, a uniform liquid film is formed in each downcomer 5 to flow downwards, and the liquid asphalt is collected into an asphalt storage tank at the lower part after reaching the required temperature through heat exchange with a steam condensate of a shell side; the steam condensate vaporized after heat exchange is cooled in a steam condenser 9 through circulating cooling water, then is sent to a condensate water tank 10, and is pumped back to the asphalt falling film cooler 1 through a condensate water pump 11 for heat exchange;
3) the asphalt storage tank keeps a set liquid level, and liquid asphalt is pressed into a forming device nozzle 15 of an asphalt forming device through nitrogen back pressure; particularly, the liquid level displayed by a liquid level recording control instrument LRC01 on the asphalt storage tank is kept constant through a flow regulating valve II 13 arranged on an asphalt outlet main pipe; at this time, the actual flow of the asphalt outlet main pipe is the same as the flow value displayed by the flow recording instrument FRC01 on the asphalt inlet main pipe, namely the total outflow flow is equal to the total inflow flow; through the matching adjustment of the third flow regulating valve 14 on each path of asphalt outlet branch pipe, the asphalt flow displayed by the second flow recording control instrument FRC03 is 1/n of the asphalt flow displayed by the flow recording instrument FR01, even though the asphalt flow of each path of asphalt branch pipe is equal.
The liquid asphalt comprises modified asphalt or moderate temperature asphalt.
And if the asphalt treatment capacity during cooling forming is reduced to below 70% of the set treatment capacity, 1-3 asphalt inlet branch pipes are shut off, and the normal operation of the system can be ensured by adopting the rest asphalt inlet branch pipes for feeding.
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
As shown in fig. 5, in this embodiment, a specific process of forming liquid asphalt after being cooled by the asphalt falling film cooler 1 (as shown in fig. 5) is briefly described by taking an example that 2 liquid-separating regions (shown in fig. 2) having the same area are arranged at the top of the asphalt falling film cooler 1.
In order to improve the operation elasticity of the asphalt falling film cooler 1, a partition plate 3 is additionally arranged at the top of an upper tube plate 6, a raw material liquid receiving disc (the upper tube plate 6) is divided into 2 liquid separating areas, an asphalt inlet connecting tube 2 is respectively arranged above the 2 liquid separating areas, the asphalt inlet connecting tube 2 extends into the central part of the raw material liquid receiving disc, and a plurality of asphalt distributing tubes 4 are arranged at the bottom of the asphalt inlet connecting tube 2, so that the liquid receiving uniformity in the whole liquid separating area is ensured.
A flow recording instrument FR01 is arranged on an asphalt inlet main pipe for conveying liquid asphalt and used for measuring and recording the total flow of the liquid asphalt, then the liquid asphalt is divided into two paths to enter two liquid separation areas of the asphalt falling film cooler 1, flow regulating valves I12 are respectively arranged on two paths of asphalt inlet branch pipes, a flow recording control instrument FRC02 is arranged on one path of asphalt inlet branch pipe at the downstream of the flow regulating valve I12, and the flow displayed by the flow recording control instrument FRC02 is half of the flow displayed by the flow recording instrument FR01 through the matching adjustment of the 2 flow regulating valves I12, so that the asphalt flow of the 2 liquid separation areas is equal.
Liquid asphalt is uniformly distributed on an upper pipe plate 6 through a plurality of asphalt distribution pipes 4 arranged on an asphalt inlet connecting pipe 2, then enters each downcomer 5 in a full flow mode, uniform liquid films flow downwards in the downcomers 5, the required temperature is reached through heat exchange with steam condensate of a shell pass of a liquid-liquid heat exchanger of the downcomer, the liquid asphalt is collected into an asphalt storage tank at the lower part, the asphalt storage tank needs to keep a certain liquid level, then the cooled liquid asphalt is pressurized and conveyed into a forming device nozzle 15 through nitrogen backpressure, the vaporized steam condensate after heat exchange is cooled in a steam condenser 9 through circulating cooling water, then is conveyed into a condensate water tank 10, and then is conveyed back to an asphalt falling film cooler 1 through a condensate water pump 11.
Because the asphalt storage tank at the lower part of the asphalt falling film cooler 1 needs to keep a certain liquid level, the asphalt outlet main pipe is provided with the second flow regulating valve 13, and the liquid level value displayed by the LRC01 is kept constant through the matching regulation of the second flow regulating valves 13. At this point, the actual flow rate of the asphalt outlet header is the same as the flow rate indicated by the flow meter FR01 on the asphalt inlet header, i.e., the total flow out is equal to the total flow in.
Adopt behind the scheme, the operation elasticity scope of pitch falling liquid film cooler 1 is showing and is improving, and the pitch behind the entry house steward is divided into the condition of two tunnel according to pitch, and pitch forming device's former nozzle 15 also corresponds and falls into 2 groups to solve the one set of nozzle of current pitch former and correspond all operational load and the pitch shaping product thickness that leads to is uneven, the cooling effect problem of bad time. The downstream of the asphalt outlet main pipe is divided into two asphalt outlet branch pipes, the flow regulating valves three 14 are respectively arranged on the asphalt outlet branch pipes, the flow recording control instrument two FRC03 is arranged on the downstream of the flow regulating valve three 14 on one of the asphalt outlet branch pipes, and the asphalt flow displayed by the flow recording control instrument two FRC03 is half of the asphalt flow displayed by the flow recording instrument FR01 through the matching adjustment of the flow regulating valves three 14 on each asphalt outlet branch pipe, so that the asphalt flows of the two asphalt branch pipes are equal.
If the treatment capacity of the liquid asphalt is reduced to below 70 percent or the heat exchange effect is poor due to the reduction of the treatment capacity, the flow regulating valve I12 of one asphalt inlet branch pipe is closed in time, and a single asphalt inlet branch pipe is adopted for feeding, so that the normal operation state can be recovered.
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 (2)
1. An asphalt falling film cooler comprises a downcomer liquid-liquid heat exchanger arranged at the upper part and an asphalt storage tank arranged at the lower part, wherein a plurality of downcomers in the downcomer liquid-liquid heat exchanger are fixed through an upper tube plate and a lower tube plate; the top of the asphalt falling film cooler is provided with an asphalt inlet connecting pipe, and the bottom of the asphalt falling film cooler is provided with an asphalt outlet; the asphalt falling film cooler is characterized in that a partition plate is arranged at the top of the upper tube plate to divide the top space of the upper tube plate into 2-4 liquid distribution areas, asphalt inlet connecting pipes are respectively arranged at the tops of the asphalt falling film coolers corresponding to the liquid distribution areas, each asphalt inlet connecting pipe extends towards the center of the falling film cooler, and a plurality of asphalt distribution pipes are longitudinally arranged at the bottom of each asphalt inlet connecting pipe.
2. An asphalt cooling molding system comprising the asphalt falling film cooler of claim 1, comprising an asphalt falling film cooler, a steam condenser, a condensate water tank, a condensate water pump, and a molding nozzle; the top of the asphalt falling film cooler is provided with a nitrogen inlet, n asphalt inlet connecting pipes are respectively connected with a liquid asphalt inlet header pipe through asphalt inlet branch pipes, and n is 2-4, and the lower part is the same as the upper part; a flow recording instrument is arranged on the asphalt inlet main pipe, a flow regulating valve I is arranged on each asphalt inlet branch pipe, wherein a flow recording regulating instrument I is arranged on n-1 asphalt inlet branch pipes, and the flow regulating valve I is connected with the flow recording regulating instrument I through a control cable; a steam outlet is arranged at the upper part of the shell side of the downcomer liquid-liquid heat exchanger, a steam condensate inlet is arranged at the lower part of the downcomer liquid-liquid heat exchanger, the steam outlet is connected with the steam condensate inlet through an external circulating pipeline, and a steam condenser, a condensate water tank and a condensate water pump are sequentially arranged on the external circulating pipeline along the flowing direction of the medium in the tube; the bottom of the asphalt storage tank is connected with n asphalt outlet branch pipes through an asphalt outlet main pipe, and the tail ends of the asphalt outlet branch pipes are respectively connected into a shaper nozzle; a liquid level recording and adjusting instrument is arranged on the asphalt storage tank, a flow adjusting valve II is arranged on the asphalt outlet main pipe, and the liquid level recording and adjusting instrument is connected with the flow adjusting valve II through a control cable; and a third flow regulating valve is respectively arranged on each asphalt outlet branch pipe, wherein a second flow recording and regulating instrument is arranged on n-1 asphalt outlet branch pipes, and the third flow regulating valve is connected with the second flow recording and regulating instrument through a control cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921145311.1U CN210340782U (en) | 2019-07-19 | 2019-07-19 | Asphalt falling film cooler and asphalt cooling forming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921145311.1U CN210340782U (en) | 2019-07-19 | 2019-07-19 | Asphalt falling film cooler and asphalt cooling forming system |
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| CN210340782U true CN210340782U (en) | 2020-04-17 |
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| CN201921145311.1U Active CN210340782U (en) | 2019-07-19 | 2019-07-19 | Asphalt falling film cooler and asphalt cooling forming system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257095A (en) * | 2019-07-19 | 2019-09-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of pitch falling film cooler and pitch are cooled and shaped system and technique |
-
2019
- 2019-07-19 CN CN201921145311.1U patent/CN210340782U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110257095A (en) * | 2019-07-19 | 2019-09-20 | 中冶焦耐(大连)工程技术有限公司 | A kind of pitch falling film cooler and pitch are cooled and shaped system and technique |
| CN110257095B (en) * | 2019-07-19 | 2024-04-26 | 中冶焦耐(大连)工程技术有限公司 | Asphalt falling film cooler and asphalt cooling forming system and technology |
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