CN213347805U - Thermosensitive material separation system - Google Patents
Thermosensitive material separation system Download PDFInfo
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- CN213347805U CN213347805U CN202021112303.XU CN202021112303U CN213347805U CN 213347805 U CN213347805 U CN 213347805U CN 202021112303 U CN202021112303 U CN 202021112303U CN 213347805 U CN213347805 U CN 213347805U
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Abstract
The utility model relates to a heat-sensitive material piece-rate system, including the rectifying column that connects gradually, once through falling film evaporator, circulation falling film evaporator and flash tank, the rectifying column is equipped with the rectifying column entry, the rectifying column entry is used for letting in heat-sensitive material, the flash tank is equipped with the flash tank export, flash tank export and rectifying column fluid intercommunication, once through each other fluid intercommunication through first liquid phase connecting line between falling film evaporator and the circulation falling film evaporator, be connected pipeline and the mutual fluid intercommunication of second liquid phase connecting line through the gas respectively between circulation falling film evaporator and the flash tank, once through falling film evaporator and circulation falling film evaporator still respectively with storage tank fluid intercommunication. The utility model discloses reducible and avoid the possibility that heat sensitive material decomposed when moving in rectifying column and falling film evaporation ware.
Description
Technical Field
The utility model relates to a material separation purification device field especially relates to a heat-sensitive material piece-rate system.
Background
There are many kinds of separation methods, such as distillation column separation, membrane separation, extraction separation, filtration separation, sedimentation separation, etc. In the chemical industry, the most widely used and mature separation device is the rectification column separation device. However, the rectifying tower device needs sufficient mass and heat transfer when separating materials, so that the materials are subjected to the processes of heat medium vaporization and cold medium condensation. However, the heat-sensitive substance has poor stability during rectification, separation and heating due to the particularity of physical properties, and is easily decomposed in the heating and vaporization process if abnormal conditions such as uneven heating, overheating or excessively long retention time occur, so that the material fluidity is easily reduced, and even solids are generated in serious conditions to block pipelines and distribution facilities, so that the separation capacity and the separation precision of the rectification tower are reduced, and the stable operation of the device is finally seriously influenced. Therefore, it is important to develop a separation apparatus capable of improving the separation stability of a heat-sensitive substance in the field of separation of heat-sensitive substances.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the utility model aims at providing a heat-sensitive material piece-rate system, the utility model discloses reducible possibility of avoiding heat-sensitive material to decompose when moving in rectifying column and falling film evaporator improves the stability of heat-sensitive material separation.
The utility model discloses a heat-sensitive material piece-rate system, including the rectifying column that connects gradually, once through falling film evaporator, circulation falling film evaporator and flash tank, the rectifying column is equipped with the rectifying column entry, the rectifying column entry is used for letting in heat-sensitive material, the flash tank is equipped with the flash tank export, flash tank export and rectifying column fluid intercommunication, once through each other fluid intercommunication through first liquid phase connecting pipeline between falling film evaporator and the circulation falling film evaporator, be connected pipeline and the mutual fluid intercommunication of second liquid phase connecting pipeline through the gas respectively between circulation falling film evaporator and the flash tank, once through falling film evaporator and circulation falling film evaporator still respectively with storage tank fluid intercommunication.
Further, be equipped with liquid distributor in the rectifying column, liquid distributor includes the collecting tank, with collecting tank fluid intercommunication hold the liquid pipe and with hold the distributor main tank of liquid pipe fluid intercommunication, the both ends of holding the liquid pipe respectively are equipped with first anti-blocking filter screen, be equipped with a plurality of liquid distribution pipes on the distributor main tank, liquid distribution pipe and the mutual fluid intercommunication in distributor main tank, distributor main tank and liquid distribution pipe are the tubulose, liquid distribution pipe bottom is equipped with the through-hole that a plurality of confession liquid flowed through.
Further, a plurality of liquid distribution pipes are distributed at intervals on two sides of the distributor main groove and are mutually communicated with the distributor main groove in a fluid mode.
Furthermore, the liquid holding pipe is perpendicular to the liquid collecting tank and the distributor main tank respectively, and the liquid collecting tank and the distributor main tank are parallel to each other.
Furthermore, the inner diameter of the pipe of the liquid distribution pipe is 3 mm-25 mm, and the height of the pipe is 3 mm-60 mm. The number of the liquid distribution pipes is 1-20.
Furthermore, the filtering precision of the first anti-blocking filter screen is 7-5000 meshes.
Furthermore, a first back flushing pipeline is arranged in the liquid holding pipe.
Furthermore, the liquid distributor is provided with a plurality of distribution holes, and the aperture of each distribution hole is 0.5 mm-10 mm.
Further, the shape of the distribution holes is circular, conical, triangular or trapezoidal, etc.
Furthermore, at least one liquid collector is respectively arranged in the once-through falling-film evaporator and the circulating falling-film evaporator, and a plurality of liquid falling holes are formed in the bottom of the liquid collector.
Furthermore, the aperture of the down-flow hole is 1 mm-30 mm.
Furthermore, the inlet of the liquid collector is provided with a third anti-blocking filter screen, and a third back-flushing pipeline is arranged between the third anti-blocking filter screen and the liquid descending hole.
Furthermore, the filtering precision of the third anti-blocking filter screen is 7-5000 meshes.
Furthermore, the top of the liquid collector is serrated, and the third anti-blocking filter screen is arranged above the top of the liquid collector.
Furthermore, at least one film distribution head is respectively arranged in the once-through falling-film evaporator and the circulating falling-film evaporator, the film distribution heads are positioned below the liquid falling holes, the film distribution heads are arranged on the tube plate of the heat exchanger, and the film distribution heads are tubular.
Further, a plurality of cloth membrane head distribution grooves which extend along the axis of the cloth membrane head and are distributed at intervals are formed in the partial outer wall of the inlet end of the cloth membrane head, the length of each cloth membrane head distribution groove is smaller than that of the cloth membrane head, namely, the cloth membrane head distribution groove is formed in one part of the cloth membrane head, and the bottom end of the cloth membrane head distribution groove is higher than that of the bottom end of the cloth membrane head. The liquid flowing out of the liquid falling hole of the liquid collector falls onto the heat exchanger tube plate, and the liquid is gathered on the heat exchanger tube plate until the liquid level is raised to be higher than the film distribution head distribution groove, so that the liquid flows into the film distribution head through the film distribution head distribution groove. Because the height that highly is higher than the bottom of cloth membrane head bottom of cloth membrane head distribution groove bottom, cloth membrane head bottom is a whole promptly, and the solid that falls into on the heat exchanger tube sheet like this can not get into cloth membrane head inside through cloth membrane head distribution groove, plays and prevents stifled function.
Furthermore, the film distribution head distribution groove is an oblique angle groove, the grooving form of the oblique angle groove is a vertical grooving type, a tangent grooving type, a sawtooth grooving type and the like, and the grooving angle is 15-90 degrees.
Furthermore, the overflow height of the anti-blocking overflow weir is 1-250 mm, the number of the grooves of the film distribution head distribution groove is 1-20, and the height of the film distribution head distribution groove is 10-400 mm.
Furthermore, a second anti-blocking filter screen is arranged at the inlet of the film distribution head, and a second back-blowing pipeline is arranged in the film distribution head.
Furthermore, the filtering precision of the second anti-blocking filter screen is 7 meshes-5000 meshes.
Further, the flash tank has a demister.
Further, two connecting ports of a gas phase connecting pipeline between the circulating falling-film evaporator and the flash tank are respectively positioned at the tops of the circulating falling-film evaporator and the flash tank.
Furthermore, two connecting ports of a second liquid phase connecting pipeline between the circulating falling-film evaporator and the flash tank are respectively positioned at the middle lower parts of the circulating falling-film evaporator and the flash tank.
Further, the blowing power of the first back-blowing pipeline, the second back-blowing pipeline and the third back-blowing pipeline can be nitrogen, compressed air, materials and the like. Through setting up a plurality of anti-pipelines that sweep, solved the problem of the decomposition thing jam system that produces after the thermal sensitive material decomposes, avoided as far as possible because jam causes rectifying column and falling film evaporation ware's ability and efficiency to descend, increase the stability of device normal production.
Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:
the utility model discloses a connect once through falling film evaporator, circulation falling film evaporator and flash tank behind rectifying column separator to with flash tank and rectifying column fluid intercommunication, simultaneously once through falling film evaporator and circulation falling film evaporator still communicate with storage tank fluid respectively, the problem that the heat-sensitive material that leads to when avoiding single adoption rectifying column to carry out material separation stability is relatively poor, easily takes place to decompose in the heating process, the stability of heat-sensitive material when the separation has been improved, and the operational capability and the stability of rectifying column have been improved.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a heat sensitive material separation system according to the present invention;
FIG. 2 is a schematic structural diagram of a liquid distributor in a rectifying tower according to the present invention;
FIG. 3 is a schematic structural diagram of a distributor main tank and a liquid distribution pipe in a top view state in a rectifying tower of the present invention;
FIG. 4 is a schematic view of the liquid trap of the present invention;
FIG. 5 is a schematic structural view of the cloth membrane head of the present invention;
FIG. 6 is a schematic top view of the cloth membrane head of the present invention;
description of reference numerals:
1-a rectifying tower; 2-one-time passage through a falling film evaporator; 3-circulating falling film evaporator; 4-a flash tank; 5-a storage tank; 10-a feed conduit; 11-pipe two; 12-a first liquid phase connection line; 13-a second liquid phase connection line; 14-gas phase connection line; 15-pipeline six; 16-pipe seven; 17-eighth pipe; 18-line nine; 19-a first anti-clogging screen; 20-a liquid collecting tank; 21-a liquid holding tube; 22-distributor main tank; 23-a liquid distribution pipe; 24-a second anti-clogging filter screen; 25-anti-blocking overflow weir; 26-film laying head; 27-a recess; 28-film distribution head distribution groove; 29-a third anti-clogging filter screen; 31-a downcomer well.
In fig. 2, 4 and 6, the direction of the arrows indicates the purge path of the respective reactive purge line.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Example 1
Referring to the attached drawings 1 to 6, the utility model discloses a heat-sensitive material piece-rate system of preferred embodiment, including rectifying column 1, pass through falling film evaporator 2 with rectifying column 1 through pipeline two 11 interconnect, with pass through falling film evaporator 2 once through circulation falling film evaporator 3 that pipeline 12 interconnect is connected through first liquid, flash tank 4 of being connected with circulation falling film evaporator 3, rectifying column 1 is equipped with the rectifying column entry, the rectifying column entry is linked together with feed pipe 10, feed pipe 10 is used for letting in heat-sensitive material, heat-sensitive material gets into rectifying column 1 by the rectifying column entry. The top of the flash tank 4 is provided with a flash tank outlet which is in fluid communication with the rectification column 1 via conduit six 15. The circulating falling-film evaporator 3 and the flash tank 4 are in fluid communication with each other through a vapor phase connecting line 14 and a second liquid phase connecting line 13, respectively. Two connecting ports of the gas phase connecting line 14 are respectively positioned at the top of the circulating falling film evaporator 3 and the flash tank 4. Two connecting ports of the second liquid phase connecting pipeline 13 are respectively positioned at the middle lower part of the circulating falling-film evaporator 3 and the flash tank 4. The once-through falling-film evaporator 2 is in fluid communication with the storage tank 5 through a conduit seven 16 and a conduit nine 18, and the circulating falling-film evaporator 3 is in fluid communication with the storage tank 5 through a conduit seven 16 and a conduit nine 18. The flash tank 4 has a high efficiency demister.
The rectifying tower 1 is internally provided with a liquid distributor, the liquid distributor comprises a liquid collecting tank 20, a liquid holding pipe 21 in fluid communication with the liquid collecting tank 20 and a distributor main tank 22 in fluid communication with the liquid holding pipe 21, the distributor main tank 22 is in fluid communication with a plurality of liquid distribution pipes 23, two ends of the liquid holding pipe 21 are respectively provided with a first anti-blocking filter screen 19, and a first automatic reverse flushing pipeline is arranged in the liquid holding pipe 21. The liquid holding pipe 21 is perpendicular to the sump 20 and the distributor main tank 22, respectively, and the sump 20 and the distributor main tank 22 are parallel to each other. The distributor main tank and the liquid distribution pipes are tubular, and the liquid distribution pipes are evenly distributed on two sides of the distributor main tank at intervals. The inner parts of the distributor main tank and the liquid distribution pipe are liquid flowing spaces, and the outer parts of the distributor main tank and the liquid distribution pipe are gas phase flowing spaces in the rectifying tower 1. The inner diameter of the pipe of the liquid distribution pipe 23 is 3 mm-25 mm, and the height of the pipe is 3 mm-60 mm. The number of the liquid distribution pipes 23 is 1-20. The filtering precision of the first anti-blocking filter screen 19 is 7 meshes to 5000 meshes. The bottom of the liquid distribution pipe is provided with a plurality of through holes for liquid to flow through. The aperture of the through hole is 0.5 mm-10 mm. The shape of the through hole is round, conical, triangular or trapezoidal, etc.
At least one liquid collector is respectively arranged in the once-through falling-film evaporator 2 and the circulating falling-film evaporator 3. The top of the liquid collector is in a sawtooth shape, so that the liquid distribution uniformity can be improved. The bottom of the liquid trap is provided with a plurality of down-flow holes 31. The aperture of the down-flow hole 31 is 1 mm-30 mm. The entry of liquid trap is equipped with stifled filter screen 29 of third prevention, and stifled filter screen 29 of third prevention is located the top of liquid trap. The filtering precision of the third anti-blocking filter screen 29 is 7 meshes to 5000 meshes. A third automatic reverse purging pipeline is arranged between the third blockage prevention filter screen 29 and the down-flow hole 31. The liquid entering the once-through falling-film evaporator 2 and the circulating falling-film evaporator 3 is uniformly distributed through the liquid collector, the distributed liquid falls onto the heat exchanger tube plate through the falling liquid hole 31, and the heat exchanger tube plate is parallel to the bottom of the liquid collector.
At least one film distribution head 26 is respectively arranged in the once-through falling-film evaporator 2 and the circulating falling-film evaporator 3, and the film distribution heads 26 are arranged on a heat exchanger tube plate. The film distribution head 26 is positioned below the down-flow hole 31. The partial outer wall of cloth membrane head 26's entry end is seted up a plurality of cloth membrane head distributing grooves 28 that extend and interval distribution along its axis, and the length of cloth membrane head distributing groove 28 is less than the length of cloth membrane head, and cloth membrane head distributing groove 28 has been seted up to cloth membrane head's a part promptly. The liquid flowing out of the liquid falling holes of the liquid collector falls onto the heat exchanger tube plate, and the liquid is gathered on the heat exchanger tube plate until the liquid level is raised to be higher than the film distribution head distribution groove 28, so that the liquid flows into the film distribution head through the film distribution head distribution groove 28.
The utility model discloses in all be equipped with the control valve on the every pipeline or the pipeline mentioned above.
1,1,1,3, 3-pentachloropropane is taken as the thermosensitive material to be separated and purified, and the method for separating and purifying the component containing the thermosensitive material by adopting the thermosensitive material separation system of the utility model comprises the following steps:
step 1: adding a component containing a heat-sensitive substance to be separated into impurity components into the rectifying tower 1 through a feed pipeline 10; in the rectifying tower 1, the heat-sensitive substances uniformly distribute the liquid on the filler under the action of the liquid distributor. The components containing the heat-sensitive substances are uniformly distributed after passing through the liquid collecting tank 20, the liquid holding pipe 21 and the distributor main tank 22. The first anti-clogging screens 19 at both ends of the liquid holding tube 21 prevent clogging of the liquid distributor. Meanwhile, the first automatic back purging pipeline can also purge the decomposition products generated after the heat-sensitive substances are decomposed.
Step 2: the material treated by the rectifying tower 1 enters the once-through falling- film evaporator 2, 1,1,1,3, 3-pentachloropropane, is heated by the once-through falling-film evaporator 2, and then enters the circulating falling-film evaporator 3. The heat medium introduced into the once-through falling-film evaporator 2 can be hot water, steam, heat-conducting oil or molten salt and the like. The heat-sensitive substance exchanges heat with the once-through falling-film evaporator 2 once in the rectifying tower 1, and a certain flow rate is ensured, wherein the flow rate is 5-200 t/hr. The separated thermosensitive substances are gathered at the bottom of the once-through falling-film evaporator 2, and in order to prevent the thermosensitive substances from being accumulated in a tower kettle of the once-through falling-film evaporator 2, the separated thermosensitive substances enter a storage tank 5 for storage.
And step 3: gas and liquid generated after the substance entering the circulating falling-film evaporator 3 is heated enter the flash tank 4 through a gas phase connecting pipeline 14 and a second liquid phase connecting pipeline 13 respectively, gas is formed in the flash tank 4, and the generated gas returns to the rectifying tower 1 through a pipeline six 15 for mass and heat transfer. The heat medium introduced into the circulating falling-film evaporator 3 can be hot water, steam, heat-conducting oil or molten salt and the like. The separated heat-sensitive substances are gathered at the bottom of the circulating falling-film evaporator 3, and in order to prevent the heat-sensitive substances from accumulating in the tower kettle of the circulating falling-film evaporator 3, the separated heat-sensitive substances enter a storage tank 5 for storage.
In the steps, the thermosensitive substance is connected with the circulating falling-film evaporator 3 through the flash tank 4, so that circulating heat exchange is carried out in the rectifying tower 1, the heated material can enter the rectifying tower 1 with low pipe loss, and the components containing the thermosensitive substance are separated in the rectifying tower 1 through the circulating heat exchange of the falling-film evaporator 2 and the circulating falling-film evaporator 3 at one time, so that the separated thermosensitive substance is prevented from accumulating in the rectifying tower 1, and the decomposition of the thermosensitive substance caused by heat accumulation is avoided.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A heat-sensitive substance separation system characterized by: including rectifying column, once through falling film evaporator, circulation falling film evaporator and flash tank that connect gradually, the rectifying column is equipped with the rectifying column entry, the rectifying column entry is used for letting in heat-sensitive material, the flash tank is equipped with the flash tank export, the flash tank export with rectifying column fluid intercommunication, once through each other fluid intercommunication through first liquid phase connecting line between falling film evaporator and the circulation falling film evaporator, be connected pipeline and the mutual fluid intercommunication of second liquid phase through the gas respectively between circulation falling film evaporator and the flash tank, once pass through falling film evaporator and circulation falling film evaporator still respectively with storage tank fluid intercommunication.
2. A heat-sensitive material separation system according to claim 1, wherein: be equipped with liquid distributor in the rectifying column, liquid distributor include the collecting tank, with the collecting tank fluid intercommunication hold the liquid pipe and with hold the distributor owner groove of liquid pipe fluid intercommunication, the both ends of holding the liquid pipe respectively are equipped with first anti-blocking filter screen, be equipped with a plurality of liquid distribution pipes on the distributor owner groove, distributor owner groove and liquid distribution pipe are the tubulose, liquid distribution socle portion is equipped with the through-hole that a plurality of confession liquid flowed through.
3. A heat-sensitive material separation system as recited in claim 2, wherein: a first back flushing pipeline is arranged in the liquid holding pipe.
4. A heat-sensitive material separation system according to claim 1, wherein: at least one liquid collector is respectively arranged in the once-through falling-film evaporator and the circulating falling-film evaporator, and a plurality of liquid falling holes are formed in the bottom of the liquid collector.
5. A heat-sensitive material separation system according to claim 4, wherein: the entry of liquid trap is equipped with the stifled filter screen of third prevention, be equipped with the third blowback between stifled filter screen of third prevention and the down flow hole and sweep the pipeline.
6. A heat-sensitive material separation system according to claim 5, wherein: the top of liquid trap is the cockscomb structure, stifled filter screen of third prevention is located the top of liquid trap.
7. A heat-sensitive material separation system according to claim 4, wherein: the once-through falling-film evaporator and the circulating falling-film evaporator are respectively provided with at least one film distribution head, the film distribution heads are positioned below the falling liquid holes, the film distribution heads are arranged on the tube plate of the heat exchanger, and the film distribution heads are tubular.
8. A heat-sensitive material separation system according to claim 7, wherein: cloth membrane head distributing groove that a plurality of its axis of edge extended and interval distribution were seted up to cloth membrane head's entry end, cloth membrane head distributing groove is the bevel groove, cloth membrane head distributing groove's length is less than cloth membrane head's length.
9. A heat-sensitive material separation system according to claim 7, wherein: the entry of cloth membrane head is equipped with the second and prevents stifled filter screen, it sweeps the pipeline to be equipped with the second blowback in the cloth membrane head.
10. A heat-sensitive material separation system according to claim 1, wherein: the flash tank has a demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021112303.XU CN213347805U (en) | 2020-06-16 | 2020-06-16 | Thermosensitive material separation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021112303.XU CN213347805U (en) | 2020-06-16 | 2020-06-16 | Thermosensitive material separation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213347805U true CN213347805U (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021112303.XU Active CN213347805U (en) | 2020-06-16 | 2020-06-16 | Thermosensitive material separation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213347805U (en) |
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2020
- 2020-06-16 CN CN202021112303.XU patent/CN213347805U/en active Active
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