CN111076572A - Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system - Google Patents
Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system Download PDFInfo
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- CN111076572A CN111076572A CN201911411621.8A CN201911411621A CN111076572A CN 111076572 A CN111076572 A CN 111076572A CN 201911411621 A CN201911411621 A CN 201911411621A CN 111076572 A CN111076572 A CN 111076572A
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- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 28
- 239000000126 substance Substances 0.000 title claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 121
- 239000000178 monomer Substances 0.000 claims abstract description 48
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 8
- 239000003112 inhibitor Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000009467 reduction Effects 0.000 description 17
- 230000008676 import Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
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- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
- F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention discloses a spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system, which comprises a plurality of spiral tube monomers, a medium inlet main pipe, a medium outlet main pipe, a cooling water inlet main pipe and a cooling water outlet main pipe, wherein the spiral tube monomers are stacked together and fixed with each other through fasteners, the spiral tube monomers externally comprise a medium inlet, a medium outlet, a cooling water inlet and a cooling water outlet, each medium inlet is connected to the medium inlet main pipe, each medium outlet is connected to the medium outlet main pipe, each cooling water inlet is connected to the cooling water inlet main pipe, and each cooling water outlet is connected to the cooling water outlet main pipe. The spiral pipe monomer includes upper cover plate, lower apron and spiral plate, and the spiral plate sets up between upper cover plate, lower apron, and the spiral plate has the circular arc section with epitaxial termination department in central position, and spiral plate cooperation upper cover plate constructs two regions with lower apron in the spiral pipe monomer: a medium spiral groove and a cooling water spiral groove.
Description
Technical Field
The invention relates to the field of heat exchangers, in particular to a spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system.
Background
A heat exchanger is a device commonly used in process systems to cool or heat a medium to a desired condition for subsequent operation.
A cooling heat exchanger is often arranged in front of a vacuum system in a chemical vacuum system, so that gas entering the vacuum pump enters the vacuum pump under a lower condition, and as organic matter media have high possibility of generating a polymerization reaction to generate flocculent macromolecules under a high-temperature condition, the vacuum pump is blocked.
In the prior art, heat exchangers under different process conditions have specific heat load, the heat exchangers need to be replaced when the process conditions are replaced, the replacement is very troublesome, the cost is increased, and the modification and the upgrading of the production process are not facilitated.
Disclosure of Invention
The invention aims to provide a spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a chemical industry vacuum system is with preventing spiral pipe heat exchanger that medium polymerization, including a plurality of spiral pipe monomers and medium inlet manifold, medium outlet manifold, cooling water inlet manifold and cooling water outlet manifold, the spiral pipe monomer is piled up together and is fixed each other through the fastener, the spiral pipe monomer has the medium import to the outside, the medium export, cooling water import and cooling water export, each medium import all is connected to medium inlet manifold, each medium export all is connected to medium outlet manifold, each cooling water import is connected to cooling water inlet manifold, each cooling water export is connected to cooling water outlet manifold.
The spiral pipe monomers overlapped with each other respectively bear the cooling work of one path, each layer of spiral pipe monomer independently carries out the heat exchange process, according to the original design, the inlet air temperature, the outlet air temperature of the medium, the inlet water temperature and the outlet water temperature of the cooling water are known, so the heat exchange load of each layer is determined when being manufactured, then if the heat exchange needs to be increased, for example, the inlet air temperature is greatly increased or the inlet air flow is greatly increased, the original number of spiral pipe monomers can not completely meet the heat exchange requirement, so the heat exchange structure needs to be increased The cooling water inlet main pipe and the cooling water outlet main pipe are mounted, then three layers or four layers of spiral pipe monomers are mounted and connected with the medium inlet main pipe, the medium outlet main pipe, the cooling water inlet main pipe and the cooling water outlet main pipe, and the use requirements can be met.
Further, the spiral pipe monomer includes upper cover plate, lower apron and spiral plate, and the spiral plate sets up in upper cover plate, down between the apron, and the spiral plate has the circular arc section with epitaxial termination department in central position, and spiral plate cooperation upper cover plate constructs two regions with lower apron in the spiral pipe monomer: a medium spiral groove and a cooling water spiral groove;
the upper cover plate or the lower cover plate at the epitaxial termination part of the medium spiral groove is provided with a medium inlet, the upper cover plate or the lower cover plate at the central part of the medium spiral groove is provided with a medium outlet, the upper cover plate or the lower cover plate at the epitaxial termination part of the cooling water spiral groove is provided with a cooling water outlet, and the upper cover plate or the lower cover plate at the central part of the cooling water spiral groove is provided with a cooling water inlet.
The spiral medium flow channel and the cooling water flow channel are spirally advanced in the respective flow channels, and the flow has continuous turning, so the flow tends to turbulence more easily, and the heat exchange coefficient of the fluid and the wall surface is higher in a turbulent flow state, so the heat exchange effect can be improved. The inlet with the medium sets up respectively in central authorities and the outside with the import of cooling water, the medium is the outside-in flow promptly, and the cooling water is from inside to outside flow, and the medium has lower temperature in central exit, let the low temperature water that just got into the helicla flute cool off this moment, and the effect is better, the higher warm water after experiencing the heat transfer meets just getting into the free original medium of helix tube in its exit, and the medium is the high temperature state this moment, need not the water of very low temperature to cool off, and, when the medium got into the helix tube monomer, if meet the strong cold wall, the influence continuity of admitting air of sharply contracting on the contrary.
The upper cover plate frame and the lower cover plate frame cover the spiral plate to form a flowing space of cooling water and medium.
Furthermore, the spiral tube heat exchanger also comprises a sealing plate, in the same spiral tube single body, a medium inlet, a medium outlet, a cooling water inlet and a cooling water outlet are respectively arranged on the upper cover plate and the lower cover plate in a pair manner from top to bottom, and corresponding inlets and outlets of adjacent spiral tube single bodies are respectively communicated in a butt joint manner; the medium inlet main pipe, the medium outlet main pipe, the cooling water inlet main pipe and the cooling water outlet main pipe are connected to the bottommost or topmost spiral pipe monomer, and the exposed medium inlet, medium outlet, cooling water inlet and cooling water outlet on the spiral pipe monomer far away from the medium inlet main pipe, the medium outlet main pipe, the cooling water inlet main pipe and the cooling water outlet main pipe are sealed by sealing plates.
All set up unanimous medium import from top to bottom on the apron, the medium export, cooling water inlet and cooling water export, make a plurality of spiral pipe monomers that stack up only need with a spiral pipe monomer and medium inlet manifold, medium outlet manifold, cooling water inlet manifold and cooling water outlet manifold be connected and can communicate all runners, prevent loaded down with trivial details tube coupling, for the standardization when the spiral pipe monomer makes, all opening equal positions are unanimous, use the corresponding interface of closing plate shutoff on last stage spiral pipe monomer can.
Further, the medium spiral groove has a groove width gradually increasing from the center outward. The medium spiral groove is a flow channel of a gas medium, the gas has a contraction tendency after being cooled, if the cross section area on the flow path is kept unchanged, the gas goes forward on the flow path, the gas undergoes heat exchange but the temperature is reduced to cause pressure reduction, the pressure is reduced to cause temperature reduction again, however, the temperature reduction caused by the factor is not the heat loss of the gas, the heat in the gas is not transferred to cooling water, therefore, the gas still can be converted into high temperature in the subsequent vacuum pump compression link, in addition, the temperature reduction caused by the pressure reduction hinders the heat exchange between the gas and the cooling water on the subsequent path, the gas can be compressed to a certain extent after the temperature reduction through the tapered gas flow channel, so that the temperature reduction is not obvious, and the gas can fully exchange heat with the cooling water on the flow path, transferring the heat of the device. The pressure of the gas before and after entering and exiting the heat exchanger is basically unchanged, so that the gas cannot be compressed and conveyed in a follow-up vacuum pump at a large compression ratio, and the large compression ratio can cause rapid temperature rise to cause polymerization of some high molecular monomers.
The general expression of the spiral equation of the spiral plate in a polar coordinate system is
Where ρ is the pole diameter, t is the polar angle, a, b, c, d, e are the self-defined coefficients respectively, and c is required to be greater than 1.
The single helix corresponding to the equidistant helix is
And rotating a spiral line of one hundred eighty degrees only by adding t to a half period (b in the formula), and selecting the spiral line with gradually changed groove width, wherein the coefficient c in the formula is required to be larger, and the larger the c is, the larger the change rate is, the volume change rate can be roughly estimated according to the difference of the processing media and the temperature difference before and after the media enter and exit, so that the coefficient c with a proper value is selected. The a in the formula influences the whole size of the spiral line, a proper coefficient a is selected according to the gas flow to be processed by the device, and d and e in the formula influence the offset of the spiral line and are used for adjusting the wall thickness of the spiral plate and the groove width proportion of the cooling water tank medium groove.
Furthermore, the upper cover plate, the lower cover plate and the spiral plate are detachably connected. Removable connection can make things convenient for operating personnel to clear up the helicla flute or change the spiral plate, as aforesaid, different medium, operating mode have different gas shrinkage rates, so, the shape of spiral plate is the best carries out corresponding adjustment so that the spiral pipe monomer can high-efficient operation, changes the spiral plate and can obtain optimum adaptation.
Preferably, the spiral tube heat exchanger further comprises a flow squeezing block which is also spiral, the flow squeezing block has the same wall thickness in the extending direction of the flow squeezing block, and the flow squeezing block is placed in the medium spiral groove. The cooling water tank and the medium tank are separated by the spiral plate for reducing heat exchange resistance as much as possible, so that the whole spiral plate needs to be replaced when being replaced, and as before, the cooling working conditions can be adapted to different cooling working conditions only by changing the path width of the gas flow path groove, so that the passage area can be changed by adding the displacement object in the medium tank, the displacement object has the wall thickness which is not changed along the length of the displacement object, and the medium tank gradually becomes gradually reduced and wide, so the flow area ratio of the medium before and after entering and exiting is reduced, namely, the gas shrinks to a greater extent in the heat exchanger.
Furthermore, sealing gaskets are arranged at the contact positions of the spiral plate and the upper cover plate and the lower cover plate. The sealing gasket prevents the medium tank and the cooling water tank from flowing.
The medium spiral groove and the cooling water spiral groove have different groove widths. The flow area of the medium and the cooling water is changed according to the heat load requirement.
Furthermore, the outer edges of the upper cover plate and the lower cover plate are provided with connecting lugs, the spiral tube heat exchanger further comprises a screw rod and a nut, and the screw rod sequentially penetrates through the connecting lugs and is fastened at two ends by the nuts. The sugarcoated haws are stringed, so that the space is saved and the structure is compact.
Furthermore, a polymerization inhibitor adding port is arranged on the side surface of the medium inlet main pipe. The invention provides a jet mixing flow port, which can remove temperature reduction to reduce polymerization conditions, minimize rapid temperature rise caused by rapid pressure change, and prevent medium from polymerizing in a subsequent vacuum pump by increasing polymerization inhibitor.
Compared with the prior art, the invention has the beneficial effects that: the medium is led into the device from the medium inlet main pipe, spirally and inwards moves in each layer of spiral pipe single body respectively, is cooled by the cooling water flowing reversely, is collected into the medium outlet main pipe through the medium outlet at the middle position of the spiral pipe single body, and is discharged out of the device. The spirally advancing airflow is in a turbulent flow state, the heat exchange coefficient with the surrounding wall surface is high, in addition, the pressure reduction caused by temperature reduction is counteracted due to the contraction of the flow channel, the pressure in and out is kept consistent as much as possible, the polymerization caused by the rapid temperature rise caused by the high pressure rise in the subsequent vacuum pump due to the low pressure at the outlet is prevented, the cross flowing cooling water and the medium are prevented, and the continuous air inlet is prevented from being influenced by the rapid cooling and the volume sudden shrinkage of the medium at the inlet.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic view of the final assembly of the present invention;
FIG. 2 is a front sectional view of a spiral pipe unit of the present invention;
FIG. 3 is a schematic top view of a single body of the spiral pipe of the present invention;
FIG. 4 is view A of FIG. 1;
FIG. 5 is a schematic top view of a single body of the spiral pipe of the present invention with equal groove widths;
FIG. 6 is a schematic top view of a single spiral tube incorporating a flow-forcing block in accordance with the present invention;
FIG. 7 is a schematic top view of the media spiral groove and the cooling water spiral groove of the present invention with different groove widths.
In the figure: 1-spiral tube monomer, 101-medium spiral groove, 102-cooling water spiral groove, 11-upper cover plate, 12-lower cover plate, 13-spiral plate, 14-medium inlet, 15-medium outlet, 16-cooling water inlet, 17-cooling water outlet, 18-connecting lug, 21-medium inlet main pipe, 22-medium outlet main pipe, 25-polymerization inhibitor adding port, 29-sealing plate, 3-flow extrusion block, 8-screw rod and 9-sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the spiral tube heat exchanger for preventing medium polymerization for the chemical vacuum system comprises a plurality of spiral tube monomers 1, a medium inlet main pipe 21, a medium outlet main pipe 22, a cooling water inlet main pipe and a cooling water outlet main pipe, wherein the spiral tube monomers 1 are stacked together and fixed with each other through fasteners, the spiral tube monomers 1 are externally provided with a medium inlet 14, a medium outlet 15, a cooling water inlet 16 and a cooling water outlet 17, each medium inlet 14 is connected to the medium inlet main pipe 21, each medium outlet 15 is connected to the medium outlet main pipe 22, each cooling water inlet 16 is connected to the cooling water inlet main pipe, and each cooling water outlet 17 is connected to the cooling water outlet main pipe.
The stacked spiral pipe monomers 1 respectively undertake the cooling work of one path, each layer of spiral pipe monomers 1 independently carry out the heat exchange process, according to the original design, the inlet air temperature, the outlet air temperature of the medium, the inlet water temperature and the outlet water temperature of the cooling water are known, so the heat exchange load of each layer is determined when being manufactured, then if the heat exchange needs to be increased, for example, the inlet air temperature is greatly increased or the inlet air flow is greatly increased, the original number of spiral pipe monomers 1 can not completely meet the heat exchange requirement, so the heat exchange structure needs to be increased, but the invention can increase the processing capacity by increasing the number of the spiral pipe monomers 1, for example, ten layers of spiral pipe monomers 1 are needed when the original three thousand square hours of air flow is needed, then the medium inlet main pipe 21 can be detached, and the medium inlet main pipe 21 can be detached under the condition that the long-term four thousand square, The medium outlet main pipe 22, the cooling water inlet main pipe and the cooling water outlet main pipe are mounted, then the three or four layers of spiral pipe monomers 1 are mounted and connected with the medium inlet main pipe 21, the medium outlet main pipe 22, the cooling water inlet main pipe and the cooling water outlet main pipe, and the use requirement can be met.
As shown in fig. 2 and 3, the spiral tube single body 1 includes an upper cover plate 11, a lower cover plate 12 and a spiral plate 13, the spiral plate 13 is disposed between the upper cover plate 11 and the lower cover plate 12, the spiral plate 13 has a circular arc section at the central position and the end of the extension, and the spiral plate 13 cooperates with the upper cover plate 11 and the lower cover plate 12 to construct two regions in the spiral tube single body 1: a medium helical groove 101 and a cooling water helical groove 102;
the upper cover plate 11 or the lower cover plate 12 at the extension termination part of the medium spiral groove 101 is provided with a medium inlet 14, the upper cover plate 11 or the lower cover plate 12 at the center of the medium spiral groove 101 is provided with a medium outlet 15, the upper cover plate 11 or the lower cover plate 12 at the extension termination part of the cooling water spiral groove 102 is provided with a cooling water outlet 17, and the upper cover plate 11 or the lower cover plate 12 at the center of the cooling water spiral groove 102 is provided with a cooling water inlet 16.
The spiral medium flow channel and the cooling water flow channel are spirally advanced in the respective flow channels, and the flow has continuous turning, so the flow tends to turbulence more easily, and the heat exchange coefficient of the fluid and the wall surface is higher in a turbulent flow state, so the heat exchange effect can be improved. The import with the medium and the import of cooling water set up respectively in central authorities and the outside, the medium is the outside-in flow promptly, and the cooling water is from inside to outside flow, and the medium has lower temperature in central exit, let the low temperature water that just got into the spiral groove at this moment cool off, and the effect is better, the higher warm water after experiencing the heat transfer meets the original medium that just got into spiral pipe monomer 1 in its exit, and the medium is the high temperature state this moment, need not the water of very low temperature to cool off, and, when the medium got into spiral pipe monomer 1, if meet the strong cold wall, the influence continuity of admitting air is sharply shrunk on the contrary.
The upper and lower cover plates cover the spiral plate 13 to form a flowing space for cooling water and medium.
As shown in fig. 1 and 4, the spiral tube heat exchanger further includes a sealing plate 29, in the same spiral tube single body 1, the medium inlet 14, the medium outlet 15, the cooling water inlet 16 and the cooling water outlet 17 are respectively arranged on the upper cover plate 11 and the lower cover plate 12 in a pair manner from top to bottom, and corresponding inlets and outlets of adjacent spiral tube single bodies 1 are respectively in butt joint communication; the medium inlet manifold 21, the medium outlet manifold 22, the cooling water inlet manifold and the cooling water outlet manifold are connected to the bottommost or topmost spiral tube single body 1, and the exposed medium inlets 14, medium outlets 15, cooling water inlets 16 and cooling water outlets 17 on the spiral tube single body 1 far away from the medium inlet manifold 21, the medium outlet manifold 22, the cooling water inlet manifold and the cooling water outlet manifold are sealed by sealing plates 29.
All set up unanimous medium import 14 from top to bottom on the apron, medium export 15, cooling water import 16 and cooling water export 17, make a plurality of spiral pipe monomers 1 that stack up only need with a spiral pipe monomer 1 and medium inlet manifold 21, medium export house steward 22, cooling water inlet manifold and cooling water export house steward are connected and can be linked together all runners, prevent loaded down with trivial details tube coupling, standardization when making for spiral pipe monomer 1, all openings equal position is unanimous, use the corresponding interface of closing plate shutoff on last stage spiral pipe monomer 1 can.
As shown in fig. 3, the medium helical groove 101 has a groove width gradually increasing from the center outward. The medium spiral groove 101 is a flow passage of a gas medium, the gas has a tendency of shrinking after being cooled, if the cross-sectional area on the flow path is kept unchanged, compared with the equidistant spiral line of fig. 5, if the gas advances on such a flow path, the gas undergoes heat exchange and the temperature is reduced, the pressure is reduced, and the temperature is reduced again due to the pressure reduction, however, the temperature reduction caused by the factor is not the heat loss of the gas itself, and the heat in the gas is not transferred to cooling water, so the gas still turns into high temperature in the subsequent vacuum pump compression link, in addition, the temperature reduction caused by the pressure reduction hinders the heat exchange between the gas and the cooling water on the subsequent path, and the invention can lead the gas to be compressed to a certain extent after the temperature reduction through the tapered gas flow passage, so that the temperature reduction is not obvious, the heat exchange is fully carried out on the flow path with the cooling water, and the heat of the heat exchanger is transferred out. The pressure of the gas before and after entering and exiting the heat exchanger is basically unchanged, so that the gas cannot be compressed and conveyed in a follow-up vacuum pump at a large compression ratio, and the large compression ratio can cause rapid temperature rise to cause polymerization of some high molecular monomers.
The general expression of the spiral equation of the spiral plate 13 in a polar coordinate system is
Where ρ is the pole diameter, t is the polar angle, a, b, c, d, e are the self-defined coefficients respectively, and c is required to be greater than 1.
FIG. 5 shows a single helical line
And rotating a spiral line of one hundred eighty degrees only by adding t to a half period (b in the formula), and selecting the spiral line with gradually changed groove width, wherein the coefficient c in the formula is required to be larger than 1, and the larger the c is, the larger the change rate is, the volume change rate can be roughly estimated according to the difference of the processing media and the temperature difference before and after the media enter and exit, so that the coefficient c with a proper value is selected. The a in the formula influences the whole size of the spiral line, a proper coefficient a is selected according to the gas flow to be processed by the device, and d and e in the formula influence the offset of the spiral line and are used for adjusting the wall thickness of the spiral plate and the groove width proportion of the cooling water tank medium groove.
As shown in fig. 2, the upper cover plate 11, the lower cover plate 12 and the spiral plate 13 are detachably connected. Removable connection can make things convenient for operating personnel to clear up the helicla flute or change the spiral plate, as aforesaid, different medium, operating mode have different gas shrinkage rates, so, the shape of spiral plate is best to be carried out corresponding adjustment so that spiral pipe monomer 1 can high-efficient operation, changes spiral plate 13 and can obtain optimum adaptation.
As shown in fig. 3, the spiral tube heat exchanger further comprises a flow squeezing block 3, the flow squeezing block 3 is also spiral, the flow squeezing block 3 has the same wall thickness in the extending direction, and the flow squeezing block 3 is placed in the medium spiral groove 101. The spiral plate 13 separates the cooling water tank and the medium tank by using one spiral plate in order to reduce heat exchange resistance as much as possible, so that the whole spiral plate needs to be replaced when being replaced, and as mentioned above, the change of the path width of the gas flow path tank can be adapted to different cooling working conditions, so that the path area can be changed by adding the displacement object in the medium tank, the displacement object has the wall thickness which is not changed along the length of the displacement object, and the medium tank gradually becomes gradually reduced and widened, so that the flow area ratio of the medium before and after entering and exiting is reduced, namely, the gas is contracted in the heat exchanger to a greater degree.
And sealing gaskets are arranged at the contact parts of the spiral plate 13 and the upper cover plate 11 and the lower cover plate 12. The sealing gasket prevents the medium tank and the cooling water tank from flowing.
As shown in fig. 7, the medium helicoid groove 101 and the cooling water helicoid groove 102 have different groove widths. The flow area of the medium and the cooling water is changed according to the heat load requirement.
As shown in fig. 1, the outer edges of the upper cover plate 11 and the lower cover plate 12 are provided with connecting lugs 18, the spiral tube heat exchanger further comprises a screw 8 and a nut, and the screw 8 sequentially penetrates through the connecting lugs 18 and is fastened at two ends by the nut. The sugarcoated haws are stringed, so that the space is saved and the structure is compact.
As shown in FIG. 1, a polymerization inhibitor addition port 25 is provided in the side of the medium inlet manifold 21. The invention provides a jet mixing flow port, which can remove temperature reduction to reduce polymerization conditions, minimize rapid temperature rise caused by rapid pressure change, and prevent medium from polymerizing in a subsequent vacuum pump by increasing polymerization inhibitor.
The use principle of the device is as follows: the medium enters the device from the medium inlet manifold 21, spirally and inwardly advances in each layer of the spiral tube single bodies 1 respectively, is cooled by the cooling water flowing reversely, is collected on the medium outlet manifold 22 through the medium outlet 15 at the middle position of the spiral tube single bodies 1, and then is discharged out of the device.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a chemical industry vacuum system is with preventing spiral pipe heat exchanger that medium polymerization which characterized in that: the spiral tube heat exchanger comprises a plurality of spiral tube monomers (1), a medium inlet main pipe (21), a medium outlet main pipe (22), a cooling water inlet main pipe and a cooling water outlet main pipe, wherein the spiral tube monomers (1) are stacked together and fixed with each other through fasteners, the spiral tube monomers (1) are externally provided with a medium inlet (14), a medium outlet (15), a cooling water inlet (16) and a cooling water outlet (17), each medium inlet (14) is connected to the medium inlet main pipe (21), each medium outlet (15) is connected to the medium outlet main pipe (22), each cooling water inlet (16) is connected to the cooling water inlet main pipe, and each cooling water outlet (17) is connected to the cooling water outlet main pipe.
2. A spiral tube heat exchanger for preventing medium polymerization in a chemical vacuum system according to claim 1, wherein: spiral pipe monomer (1) includes upper cover plate (11), lower apron (12) and spiral plate (13), spiral plate (13) set up in upper cover plate (11), down between apron (12), and spiral plate (13) have the circular arc section with epitaxial termination department in central point position, and spiral plate (13) cooperation upper cover plate (11) constructs two regions with lower apron (12) in spiral pipe monomer (1): a medium spiral groove (101) and a cooling water spiral groove (102);
the medium spiral groove cooling device is characterized in that a medium inlet (14) is formed in an upper cover plate (11) or a lower cover plate (12) at the extension termination position of the medium spiral groove (101), a medium outlet (15) is formed in the upper cover plate (11) or the lower cover plate (12) at the center of the medium spiral groove (101), a cooling water outlet (17) is formed in the upper cover plate (11) or the lower cover plate (12) at the extension termination position of the cooling water spiral groove (102), and a cooling water inlet (16) is formed in the upper cover plate (11) or the lower cover plate (12) at the center of the cooling water spiral groove (102).
3. A spiral tube heat exchanger for preventing medium polymerization in a chemical vacuum system according to claim 2, wherein: the spiral tube heat exchanger also comprises a sealing plate (29), in the same spiral tube single body (1), the medium inlet (14), the medium outlet (15), the cooling water inlet (16) and the cooling water outlet (17) are respectively arranged on the upper cover plate (11) and the lower cover plate (12) in a pair manner from top to bottom, and corresponding inlets and outlets of adjacent spiral tube single bodies (1) are respectively communicated in a butt joint manner; the medium inlet manifold (21), the medium outlet manifold (22), the cooling water inlet manifold and the cooling water outlet manifold are connected to the bottommost or topmost spiral tube monomer (1), and the exposed medium inlet (14), medium outlet (15), cooling water inlet (16) and cooling water outlet (17) on the spiral tube monomer (1) far away from the medium inlet manifold (21), the medium outlet manifold (22), the cooling water inlet manifold and the cooling water outlet manifold are sealed by sealing plates (29).
4. A spiral tube heat exchanger for preventing medium polymerization in a chemical vacuum system according to claim 3, wherein: the medium spiral groove (101) has a groove width gradually increasing from the center to the outside.
5. A spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system according to claim 4, wherein: the upper cover plate (11), the lower cover plate (12) and the spiral plate (13) are detachably connected.
6. A spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system according to claim 4, wherein: the spiral tube heat exchanger further comprises a flow squeezing block (3), the flow squeezing block (3) is also spiral, the flow squeezing block (3) has the same wall thickness in the extending direction, and the flow squeezing block (3) is placed in the medium spiral groove (101).
7. A spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system according to claim 4, wherein: the spiral tube heat exchanger is characterized in that connecting lugs (18) are arranged on the outer edges of the upper cover plate (11) and the lower cover plate (12), the spiral tube heat exchanger further comprises a screw rod (8) and a nut, and the screw rod (8) sequentially penetrates through the connecting lugs (18) and is fastened at two ends through the nut.
8. A spiral tube heat exchanger for preventing medium polymerization for a chemical vacuum system according to claim 4, wherein: and sealing gaskets are arranged at the contact positions of the spiral plate (13) and the upper cover plate (11) and the lower cover plate (12).
9. A spiral tube heat exchanger for preventing medium polymerization in a chemical vacuum system according to claim 1, wherein: and a polymerization inhibitor adding port (25) is formed in the side surface of the medium inlet main pipe (21).
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| CN202011165973.2A CN112432530B (en) | 2019-12-31 | 2019-12-31 | Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system |
| CN202011165972.8A CN112484531B (en) | 2019-12-31 | 2019-12-31 | Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system |
| CN201911411621.8A CN111076572B (en) | 2019-12-31 | 2019-12-31 | Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system |
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| CN201911411621.8A CN111076572B (en) | 2019-12-31 | 2019-12-31 | Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system |
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| CN202011165973.2A Division CN112432530B (en) | 2019-12-31 | 2019-12-31 | Spiral tube heat exchanger for preventing medium polymerization for chemical vacuum system |
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Cited By (2)
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|---|---|---|---|---|
| CN112179172A (en) * | 2020-09-02 | 2021-01-05 | 东南大学 | Plate-type diffusion welding compact heat exchanger with cold and hot fluids arranged on same layer |
| US11703285B1 (en) * | 2023-02-27 | 2023-07-18 | Helen Skop | Apparatus and method for latent energy exchange |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112432530A (en) | 2021-03-02 |
| CN112484531A (en) | 2021-03-12 |
| CN111076572B (en) | 2020-11-24 |
| CN112484531B (en) | 2022-07-29 |
| CN112432530B (en) | 2022-08-05 |
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