CN218011131U - PVC rectifying column circulation heating device - Google Patents
PVC rectifying column circulation heating device Download PDFInfo
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- CN218011131U CN218011131U CN202221403239.XU CN202221403239U CN218011131U CN 218011131 U CN218011131 U CN 218011131U CN 202221403239 U CN202221403239 U CN 202221403239U CN 218011131 U CN218011131 U CN 218011131U
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Abstract
The utility model relates to a PVC rectifying tower circulating heating device, which comprises a rectifying tower and a reboiler; the lower end of the rectifying tower is provided with a circulating heating cavity, the heating end of the circulating heating cavity is connected with the heat exchange outlet end of the reboiler through a gas phase pipe, the condensing end of the circulating heating cavity is connected with the heat exchange inlet end of the reboiler through a circulating pipeline, the heating inlet end of the reboiler is also connected with a hot water inlet pipe, and the hot water inlet pipe is provided with an electric control valve; pressure sensor is installed to the rectifying column upper end, pressure sensor is connected with communication module, communication module still in proper order electric connection have the controller with automatically controlled valve. The utility model provides high heat cycle efficiency, and avoid discharging gases such as chloroethylene, acetylene to the atmosphere, reduce environmental pollution.
Description
Technical Field
The utility model relates to a safe interlocking mechanism especially relates to a PVC rectifying column circulation heating device.
Background
PVC is a general-purpose plastic having the largest output worldwide and is commonly used in the fields of building materials, industrial products, daily necessities, floor leathers, floor tiles, artificial leathers, pipes, electric wires and cables, packaging films, bottles, foamed materials, sealing materials, fibers, and the like.
In the current technological process of carbide method production PVC, chloroethylene rectifying device rectifying column all uses hot water indirect heating, and the heating is with hot water use regulating valve regulation flow to control reboiler temperature, and rectifying column top gas phase outlet pipeline is provided with the relief valve, and the relief valve take off after rectifying column top pressure reaches relief valve take off pressure, and the relief valve export is emptied to the atmosphere, and chloroethylene, acetylene gas all get into the atmosphere, not only have the potential safety hazard, and cause environmental pollution.
Therefore, those skilled in the art are dedicated to developing a cyclic heating device for a PVC rectification column, which can improve the heat cycle efficiency, avoid the emission of gases such as vinyl chloride and acetylene to the atmosphere, and reduce environmental pollution.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a PVC rectifying column circulation heating device is provided, improves heat cycle efficiency, and avoids discharging gases such as chloroethylene, acetylene to the atmosphere, reduces environmental pollution.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a PVC rectifying tower circulating heating device comprises a rectifying tower and a reboiler;
the lower end of the rectifying tower is provided with a circulating heating cavity, the heating end of the circulating heating cavity is connected with the heat exchange outlet end of the reboiler through a gas phase pipe, the condensing end of the circulating heating cavity is connected with the heat exchange inlet end of the reboiler through a circulating pipeline, the heating inlet end of the reboiler is also connected with a hot water inlet pipe, and the hot water inlet pipe is provided with an electric control valve;
pressure sensor is installed to the rectifying column upper end, pressure sensor is connected with communication module, communication module still in proper order electric connection have the controller with automatically controlled valve.
The utility model has the advantages that: the pressure sensor transmits the pressure value in the rectifying tower to the communication module, the communication module transmits data to the controller, the controller controls the electric control valve to adjust the opening of the valve in real time according to the pressure in the rectifying tower, so that the gas pressure in the rectifying tower is always smaller than the valve opening pressure of the safety valve, the phenomenon that the pressure in the rectifying tower is too large due to the fact that too much heat is transmitted to a circulating heating cavity of the rectifying tower due to the fact that too much medium heated by the reboiler is caused is avoided, and gases such as chloroethylene and acetylene are discharged to the atmosphere.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the top of the rectifying tower is connected with a gas phase outlet pipe.
Adopt the beneficial effect of above-mentioned further scheme to be gaseous outlet pipe with gas such as chloroethylene, acetylene transport to next processing procedure.
Furthermore, the gas phase outlet pipe is also connected with a bypass pipe, and a safety valve is installed on the bypass pipe.
The beneficial effect who adopts above-mentioned further scheme is that the relief valve is with the too much gas escape in the rectifying column, and the too high increase potential safety hazard of pressure in the rectifying column when avoiding pressure sensor, controller etc. to break down is unfavorable for safety in production.
Further, a first check valve is installed on the bypass pipe, and the first check valve is located between the safety valve and the gas phase outlet pipe.
Adopt the beneficial effect of above-mentioned further scheme to be that first check valve guarantees that gases such as chloroethylene, acetylene unidirectional flow when discharging to the atmosphere.
Furthermore, a connecting pipe is arranged between the rectifying tower and the pressure sensor, and a connecting flange is arranged on the connecting pipe.
The beneficial effect who adopts above-mentioned further scheme is that pressure sensor passes through connecting pipe and flange and rectifying column intercommunication, is convenient for change pressure sensor after dismantling flange fast.
Furthermore, a hot water return pipe is connected to the heating outlet end of the reboiler, a hot water bypass pipe is arranged on the hot water return pipe and communicated with the hot water inlet pipe, and a joint of the hot water bypass pipe and the hot water inlet pipe is located between the reboiler and the electric control valve.
Adopt the beneficial effect of above-mentioned further scheme to let in the circulating water in the hot water back flow to hot water import pipe in, improve hot water waste heat utilization ratio.
Furthermore, a hot water circulating pump and a flowmeter are further arranged on the hot water bypass pipe, and the hot water circulating pump and the flowmeter are electrically connected with the controller.
The beneficial effect of adopting above-mentioned further scheme is that the flowmeter transmits flow detection data to the controller, and the controller accurate control electric control valve's aperture to further improve waste heat utilization.
Furthermore, a second one-way valve is arranged on each of the hot water return pipe and the hot water bypass pipe.
Adopt above-mentioned further scheme's beneficial effect be that hot water refluence is avoided to the second check valve.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
fig. 2 is a schematic view of a heating structure of a reboiler according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a rectifying tower; 2. a reboiler; 3. a circulating heating cavity; 4. a gas phase pipe; 5. a recycle line; 6. a hot water inlet pipe; 7. an electrically controlled valve; 8. a pressure sensor; 9. a communication module; 10. a controller; 11. a gas phase outlet pipe; 12. a bypass pipe; 13. a safety valve; 14. a first check valve; 15. a connecting pipe; 16. a connecting flange; 17. a return pipe; 18. a hot water bypass pipe; 19. a hot water circulation pump; 20. a flow meter; 21. a second one-way valve.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1 and fig. 2, a circular heating device for a PVC rectifying tower comprises a rectifying tower 1 and a reboiler 2; the lower end of the rectifying tower 1 is provided with a circulating heating cavity 3, the heating end of the circulating heating cavity 3 is connected with the heat exchange outlet end of the reboiler 2 through a gas phase pipe 4, the condensing end of the circulating heating cavity 3 is connected with the heat exchange inlet end of the reboiler 2 through a circulating pipeline 5, the heating inlet end of the reboiler 2 is also connected with a hot water inlet pipe 6, and the hot water inlet pipe 6 is provided with an electric control valve 7; pressure sensor 8 is installed to rectifying column 1 upper end, and pressure sensor 8 is connected with communication module 9, and communication module 9 still has controller 10 and automatically controlled valve 7 of electric connection in proper order.
The utility model discloses in, pressure sensor 8 transmits the pressure value in the rectifying column 1 to communication module 9, communication module 9 is again with data transfer to controller 10, the electronic control valve 7 of controller 10 control is according to the pressure in the rectifying column 1 and is adjusted the valve opening degree often, make the gas pressure in its rectifying column 1 be less than relief valve 13 all the time open valve pressure, the too much heat that leads to transmitting to rectifying column 1 circulation heating intracavity 3 of medium of avoiding reboiler 2 heating arouses the too big pressure in the rectifying column 1, with chloroethylene, gas emission such as acetylene to the atmosphere.
In some embodiments, the communication module 9 may adopt a manager with PISA protocol, a controller 10 is disposed between the communication module 9 and the electronic control valve 7, and the controller 10 is electrically connected to both the communication module 9 and the electronic control valve 7. The controller 10 is used for receiving the pressure data transmitted by the communication module 9, and after analyzing the pressure data, the opening of the electric control valve 7 is accurately controlled, so that the gas pressure in the rectifying tower 1 is always smaller than the valve opening pressure of the safety valve 13, and further, the gases such as chloroethylene, acetylene and the like are prevented from being discharged to the atmosphere, the air pollution is reduced, and the potential safety hazard is reduced.
In this embodiment, the top of the rectifying tower 1 is connected to a gas-phase outlet pipe 11, and the gas-phase outlet pipe 11 transports gases such as vinyl chloride and acetylene to the next processing procedure. The gas phase outlet pipe 11 is also connected with a bypass pipe 12, and a safety valve 13 is installed on the bypass pipe 12. A first check valve 14 is installed on the bypass pipe 12, and the first check valve 14 is located between the relief valve 13 and the gas phase outlet pipe 11. The safety valve 13 discharges excessive gas in the rectifying tower 1, so that the overhigh pressure in the rectifying tower 1 when the pressure sensor 8, the controller 10 and the like break down is avoided, and potential safety hazards are reduced.
A connecting pipe 15 is arranged between the rectifying tower 1 and the pressure sensor 8, and a connecting flange 16 is arranged on the connecting pipe 15. Pressure sensor 8 is through connecting pipe 15 and flange 16 and rectifying column 1 intercommunication, is convenient for change pressure sensor 8 after dismantling flange 16 fast.
As shown in fig. 2, in some embodiments, the heating outlet of the reboiler 2 is connected to a hot water return pipe 17, and the hot water return pipe 17 delivers the low-temperature hot water after heat exchange to the heater for reheating. The hot water reflux pipe 17 is provided with a hot water bypass pipe 18, the hot water bypass pipe 18 is communicated with the hot water inlet pipe 6, the joint of the hot water bypass pipe 18 and the hot water inlet pipe 6 is positioned between the reboiler 2 and the electric control valve 7, the hot water bypass pipe 18 is also provided with a hot water circulating pump 19 and a flowmeter 20, the hot water circulating pump 19 and the flowmeter 20 are both electrically connected with the controller 10, according to the gas pressure detected by the flowmeter 20 and the pressure sensor 8, the controller 10 accurately controls the opening degree of the electric control valve 7, not only can the reutilization of the hot water waste heat be improved as much as possible, but also the hot water is circulated through the hot water circulating pump 19, the temperature of the hot water side of the reboiler 2 is reduced, the coking phenomenon of the reboiler 2 caused by the high temperature of the hot water side is reduced (avoided), the self-gathering of the rectification monomers is reduced, the decomposition of the rectification monomers is reduced, the acidity of the monomers containing acid and the monomers is reduced, the quality is improved, the corrosion of the pipelines of the equipment is reduced, the higher heat exchange effect of the reboiler 2 is kept, the shutdown times caused by the coking maintenance of the reboiler 2 is reduced, and the time for cleaning the reboiler 2 during the shutdown period is reduced. In order to prevent the hot water return pipe 17 and the hot water bypass pipe 18 from flowing backward, a second check valve 21 is installed on each of the hot water return pipe 17 and the hot water bypass pipe 18.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The utility model provides a PVC rectifying column circulation heating device which characterized in that: comprises a rectifying tower (1) and a reboiler (2);
the lower end of the rectifying tower (1) is provided with a circulating heating cavity (3), the heating end of the circulating heating cavity (3) is connected with the heat exchange outlet end of the reboiler (2) through a gas phase pipe (4), the condensing end of the circulating heating cavity (3) is connected with the heat exchange inlet end of the reboiler (2) through a circulating pipeline (5), the heating inlet end of the reboiler (2) is also connected with a hot water inlet pipe (6), and an electric control valve (7) is installed on the hot water inlet pipe (6);
pressure sensor (8) are installed to rectifying column (1) upper end, pressure sensor (8) are connected with communication module (9), communication module (9) still in proper order electric connection have controller (10) with automatically controlled valve (7).
2. The PVC rectification tower circulation heating device of claim 1, which is characterized in that: the top of the rectifying tower (1) is connected with a gas phase outlet pipe (11).
3. The PVC rectification tower circulation heating device of claim 2, which is characterized in that: the gas phase outlet pipe (11) is further connected with a bypass pipe (12), and a safety valve (13) is installed on the bypass pipe (12).
4. The PVC rectification tower circulation heating device of claim 3, which is characterized in that: a first one-way valve (14) is mounted on the bypass pipe (12), and the first one-way valve (14) is positioned between the safety valve (13) and the gas phase outlet pipe (11).
5. The PVC rectification column circulation heating device of any one of claims 1 to 4, which is characterized in that: a connecting pipe (15) is arranged between the rectifying tower (1) and the pressure sensor (8), and a connecting flange (16) is arranged on the connecting pipe (15).
6. The PVC rectification tower circulation heating device of claim 5, which is characterized in that: reboiler (2) heating exit end is connected with hot water back flow (17), be provided with hot water bypass pipe (18) on hot water back flow (17), hot water bypass pipe (18) with hot water import pipe (6) UNICOM, just hot water bypass pipe (18) with the joint of hot water import pipe (6) is located reboiler (2) with between electric control valve (7).
7. The PVC rectification tower circulation heating device of claim 6, which is characterized in that: the hot water bypass pipe (18) is further provided with a hot water circulating pump (19) and a flow meter (20), and the hot water circulating pump (19) and the flow meter (20) are both electrically connected with the controller (10).
8. The PVC rectification tower circulation heating device of claim 6, which is characterized in that: and a second one-way valve (21) is arranged on each of the hot water return pipe (17) and the hot water bypass pipe (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221403239.XU CN218011131U (en) | 2022-06-07 | 2022-06-07 | PVC rectifying column circulation heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221403239.XU CN218011131U (en) | 2022-06-07 | 2022-06-07 | PVC rectifying column circulation heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218011131U true CN218011131U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221403239.XU Active CN218011131U (en) | 2022-06-07 | 2022-06-07 | PVC rectifying column circulation heating device |
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| Country | Link |
|---|---|
| CN (1) | CN218011131U (en) |
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2022
- 2022-06-07 CN CN202221403239.XU patent/CN218011131U/en active Active
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