CN217612911U - Reduce reboiler coking heat sink of esterifying - Google Patents
Reduce reboiler coking heat sink of esterifying Download PDFInfo
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- CN217612911U CN217612911U CN202221039415.6U CN202221039415U CN217612911U CN 217612911 U CN217612911 U CN 217612911U CN 202221039415 U CN202221039415 U CN 202221039415U CN 217612911 U CN217612911 U CN 217612911U
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Abstract
The application discloses reduce reboiler coking heat sink of esterifying, including the esterifying tower, be provided with the reboiler of esterifying on the esterifying tower, be the loop setting between reboiler of esterifying and the esterifying tower, the high pressure steam import department intercommunication of the reboiler of esterifying is provided with the cooling steam pipe, the position department intercommunication that the cooling steam pipe is close to the high pressure steam import has high pressure steam conveyer pipe, be provided with the thermometer on the cooling steam pipe, first pressure detects meter and first control valve, the thermometer is located the position department that is close to the high pressure steam import, the one end intercommunication of cooling steam pipe has the outlet pipe, the one end of outlet pipe has hot water tank through the circulating pump intercommunication, be provided with second pressure on the outlet pipe and detect meter and second control valve, hot water tank's top intercommunication has the hot water inlet tube. When the device is in actual use, high-temperature steam in the high-pressure steam delivery pipe is mixed with hot water in the cooling steam pipe, and the steam temperature entering the esterification reboiler is reduced, so that the coking speed of the esterification reboiler is reduced, and the production efficiency is improved.
Description
Technical Field
The application relates to the technical field of chemical production, in particular to a device for reducing coking and cooling of an esterification reboiler.
Background
The reboiler is a special heat exchanger which can exchange heat and has a vaporization space, and the reboiler is used with a fractionating tower for vaporizing liquid again. The level of feed in the reboiler and the level of the fractionation column are at the same height, the liquid phase is supplied from the bottom line into the reboiler, typically 25-30% of the liquid phase is vaporized in the reboiler, the vaporized two-phase stream is fed back into the fractionation column, the vapor phase component in the return column passes up through the trays, and the liquid phase component falls back to the bottom of the column. The reboiler is important for the rectification to be continuously and stably performed.
The existing esterification device refining tower reboiler adopts a heating method which can be steam (high pressure saturation is best), hot water, heat conducting oil, electric heat and the like, wherein the efficiency of heating by steam is high, the number of steam byproducts in a common plant area is large, so that the reboiler is mostly heated by steam, but the steam temperature is higher, the temperature of a steam inlet entering the reboiler is higher, no temperature reduction device is provided, the system high temperature causes the esterification reboiler to be seriously coked, and further causes the heat exchange difficulty of the reboiler, in addition, the long-term high temperature easily causes the fatigue of materials such as equipment, instruments, valve pipe fittings and the like, the separation effect of the esterification tower is poor, the operation difficulty is large, the coking can be used only by shutting down and cleaning, the production efficiency is reduced, and the high-efficiency production process of a plant workshop is not facilitated.
SUMMERY OF THE UTILITY MODEL
The application provides a reduce reboiler coking heat sink of esterifying has solved among the prior art reboiler steam inlet high temperature steam of esterifying and has caused the reboiler coking of esterifying serious, and the heat transfer difficulty leads to the problem that production efficiency is low.
In order to solve the technical problem, the application provides a reduce reboiler coking heat sink of esterifying includes:
the esterification tower, be provided with the reboiler of esterifying on the esterification tower, the reboiler of esterifying with for the loop setting between the esterification tower, the high-pressure steam import department intercommunication of reboiler of esterifying is provided with the cooling steam pipe, be provided with thermometer, first pressure on the cooling steam pipe and detect meter and first control valve, the cooling steam pipe is close to the position department intercommunication of high-pressure steam import has high-pressure steam conveyer pipe, the one end intercommunication of cooling steam pipe has the outlet pipe, the one end of outlet pipe has hot water tank through the circulating pump intercommunication, be provided with second pressure on the outlet pipe and detect meter and second control valve, the top intercommunication of hot water tank has the hot water inlet tube.
In a preferred embodiment, the top of the hot water tank is also communicated with a vent pipe.
As a preferred embodiment, further comprising: back-filling the pipe;
one end of the reverse filling pipe is communicated with the cooling steam pipe, the other end of the reverse filling pipe is communicated with the hot water tank, and a third control valve is further arranged on the reverse filling pipe.
In a preferred embodiment, a gas-liquid mixer is further disposed on the cooling steam pipe.
In a preferred embodiment, an overflow pipe is further arranged at one end of the hot water tank far away from the esterification reboiler in a communication manner.
In a preferred embodiment, the hot water inlet pipe is a stainless steel pipe.
In a preferred embodiment, a ball float valve is arranged in the hot water tank, and the hot water tank is connected with the hot water inlet pipe through the ball float valve.
In a preferred embodiment, a stop valve is further disposed on the hot water inlet pipe.
In a preferred embodiment, the first pressure detector and the second pressure detector are both pressure transmitters.
Compared with the prior art, the utility model provides a reduce reboiler coking heat sink of esterifying, including the esterification tower, be provided with the reboiler of esterifying on the esterification tower, be the loop setting between reboiler of esterifying and the esterification tower, the high-pressure steam import department intercommunication of reboiler of esterifying is provided with the cooling steam pipe, be provided with the thermometer on the cooling steam pipe, first pressure detects meter and first control valve, the position department intercommunication that the cooling steam pipe is close to high-pressure steam import has high-pressure steam conveying pipe, the one end intercommunication of cooling steam pipe has the outlet pipe, the one end of outlet pipe has hot water tank through the circulating pump intercommunication, be provided with second pressure on the outlet pipe and detect meter and second control valve, hot water tank's top intercommunication has the hot water inlet tube.
It is thus clear that, use this device, when the in-service use, in hot water tank is filled with the hot water of factory hot water pipe network through hot water inlet tube, through the circulating pump on the outlet pipe of being connected with hot water tank with hot water take out in the cooling steam pipe, 300 ℃ high temperature steam in the high pressure steam delivery pipe mixes with hot water in cooling steam pipe department, make the steam temperature who gets into the high pressure steam inlet of esterifying the reboiler reduce to about 180 ℃, through reducing the steam temperature who gets into the reboiler of esterifying, and then slow down the coking speed of esterifying the reboiler, can once prolong the shutdown maintenance frequency from every half year to once every year, production cycle has been prolonged, and production efficiency is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments are briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without making any inventive changes.
Fig. 1 is a schematic structural view of a device for reducing coking and cooling of an esterification reboiler provided in an embodiment of the present invention;
in the figure, 1, an esterification tower; 2. an esterification reboiler; 3. a thermometer; 6. a circulation pump; 7. a hot water tank; 8. a float valve; 10. a condensate output pipe; 11. a temperature-reducing steam pipe; 121. a gas-liquid mixer; 12. a high pressure steam delivery pipe; 13. a water outlet pipe; 14. a hot water inlet pipe; 15. a reverse irrigation pipe; 16. an overflow pipe; 17. an emptying pipe; 41. a first pressure detector; 42. a second pressure detector; 51. a first control valve; 52. a second control valve; 53. a third control valve; 54. and a stop valve.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings.
In the description of the application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the application.
The core of this application provides a reduce reboiler coking heat sink of esterifying, can solve among the prior art reboiler steam inlet high-temperature steam of esterifying and cause the reboiler coking of esterifying serious, and the heat transfer difficulty leads to the problem that production efficiency is low.
Fig. 1 is a schematic structural view of a coking cooling device for reducing esterification in a reboiler provided by an embodiment of the present invention, as shown in fig. 1, the device includes:
Specifically, the material circulation outlet of the esterification tower 1 is connected with the material inlet of the esterification reboiler 2, and the material outlet of the esterification reboiler 2 is connected with the material circulation inlet of the esterification tower 1, so that a loop is formed between the esterification tower 1 and the esterification reboiler 2. Provide the liquid phase through the material circulation export from esterification column 1 tower bottom and enter into esterification reboiler 2, partial liquid phase in esterification reboiler 2 is vaporized, and the liquid phase that is vaporized passes through material circulation import backward flow, inputs high-pressure steam to esterification reboiler 2 through cooling steam pipe 11, becomes the medium pressure condensate through esterification reboiler 2 heat transfer after and exports from condensate output pipe 10. The connection mode, internal structure and working principle of the esterification tower 1 and the esterification reboiler 2 can be referred to in the prior art, and are not described herein again. The high pressure steam import department of reboiler 2 of esterifying communicates with cooling steam pipe 11, cooling steam pipe 11 is close to the position department intercommunication of the high pressure steam import of reboiler 2 of esterifying has high pressure steam delivery pipe 12, the other end of cooling steam pipe 11 communicates with the outlet pipe 13 of hot water tank 7, be provided with thermometer 3 on the cooling steam pipe 11, first pressure detects meter 41 and first control valve 51, thermometer 3 is located the position department that is close to high pressure steam import, be provided with circulating pump 6 on the outlet pipe 13, prior art can all be seen to circulating pump 6's structure and theory of operation.
When the device works specifically, hot water in a hot water pipe network of a plant area is filled into a hot water tank 7 through a hot water inlet pipe 14, a second control valve is opened, hot water in the hot water tank 7 enters a cooling steam pipe 11 through a water outlet pipe 13 by controlling a circulating pump 6, high-temperature steam up to 300 ℃ in a high-pressure steam conveying pipe 12 is mixed with the hot water in the cooling steam pipe 11, the temperature of the high-temperature steam is reduced after the high-temperature steam is mixed with the hot water because the temperature of the hot water is lower than that of the high-temperature steam, the temperature of the high-temperature steam finally entering a high-pressure steam inlet through the high-temperature steam mixed with the hot water can be reduced to below 180 ℃, and the coking speed of an esterification reboiler 2 is obviously reduced through cooling the high-pressure steam, so that the shutdown and maintenance time is prolonged to one year from half a year, a large amount of coke cleaning cost is saved, sewage discharge is greatly reduced, and the device is favorable for environmental protection. It should be noted that, the thermometer 3, the circulation pump 6, the first pressure detector 41, the first control valve 51, the second pressure detector 42, and the second control valve 52 are all electrically connected to the control module, and when in actual use, the control module controls the whole cooling process, so as to improve the monitoring capability of the DCS and achieve stable and continuous operation.
In actual use, when the pressure in the temperature reduction steam pipe 11 is high, the amount of hot water in the temperature reduction steam pipe 11 needs to be adjusted in time, and on the basis of the above embodiment, as a preferable implementation mode, a reverse filling pipe 15 is further provided, one end of the reverse filling pipe 15 is communicated with the temperature reduction steam pipe 11, and the other end is communicated with the hot water tank 7. The reverse filling pipe 15 is further provided with a third control valve 53, and the third control valve 53 is controlled to return the hot water in the temperature reduction steam pipe 11 to the hot water tank 7, so as to reduce the pressure of the temperature reduction steam pipe 11.
On the basis of the above embodiment, as a preferable implementation mode, an overflow pipe 16 is further communicated with one end of the hot water tank 7 away from the esterification reboiler 2, and when the water level in the hot water tank 7 is too high, the hot water can be discharged out of the hot water tank 7 through the overflow pipe 16, so that the water level can be adjusted to supply water in time. In a preferred embodiment, the top of the hot water tank 7 is also communicated with a vent pipe 17, and when the air pressure in the hot water tank 7 is too large, the air can be vented through the vent pipe 17.
Since the hot water inlet pipe 14 needs to be continuously used for a long time, in order to ensure the service life of the hot water inlet pipe 14, the hot water inlet pipe 14 is preferably made of a stainless steel pipe. On the basis of the above embodiment, the hot water inlet pipe 14 is further provided with a stop valve 54 for controlling the flow rate of the hot water in the hot water inlet pipe 14. In order to better control the water amount in the hot water tank 7 for cooling the high temperature steam in the cooling steam pipe 11, as a preferred embodiment, a ball float valve 8 is arranged in the hot water tank 7, the hot water tank 7 is connected with a hot water inlet pipe 14 through the ball float valve 8, when the water level in the hot water tank 7 reaches a set height, the ball float valve 8 is closed, and when the water level changes, the ball float valve 8 automatically opens to supplement hot water.
In order to ensure that the high-pressure steam and the hot water can be mixed quickly and the steam temperature can be reduced to the minimum, on the basis of the above embodiment, as a preferable implementation mode, a gas-liquid mixer 121 is arranged on the cooling steam pipe 11, the high-pressure steam enters an air inlet of the gas-liquid mixer 121 through the high-pressure steam conveying pipe 12, the hot water enters an liquid inlet of the gas-liquid mixer 121 through the water outlet pipe 13 and the cooling steam pipe 11, and then the high-pressure steam and the hot water are mixed sufficiently, so that the steam temperature of the esterification reboiler 2 can be reduced to the minimum. Specifically, the structure and the working principle of the gas-liquid mixer 121 can be referred to in the prior art, and will not be described herein.
Since the pressure detection and control in the entire cooling device are very important, the requirement for the pressure detector on the pipeline is high, and in order to ensure the stability and interchangeability of the detected pipeline pressure, on the basis of the above embodiment, the first pressure detector 41 and the second pressure detector 42 are both pressure transmitters.
When in actual use, hot water of a factory hot water pipe network is filled into a hot water tank through a hot water inlet pipe, hot water is pumped into a cooling steam pipe through a circulating pump on a water outlet pipe connected with the hot water tank, 300 ℃ high-temperature steam in a high-pressure steam conveying pipe is mixed with hot water at the cooling steam pipe, the steam temperature of a high-pressure steam inlet entering an esterification reboiler is reduced to about 180 ℃, the steam temperature entering the esterification reboiler is reduced, the coking speed of the esterification reboiler is further reduced, the shutdown maintenance frequency can be prolonged to once every year from once every half year, the production period is prolonged, and the production efficiency is improved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (9)
1. The utility model provides a reduce reboiler coking heat sink of esterifying which characterized in that includes:
the esterification tower, be provided with the reboiler of esterifying on the esterification tower, the reboiler of esterifying with for the loop setting between the esterification tower, the high-pressure steam import department intercommunication of reboiler of esterifying is provided with the cooling steam pipe, be provided with thermometer, first pressure on the cooling steam pipe and detect meter and first control valve, the cooling steam pipe is close to the position department intercommunication of high-pressure steam import has high-pressure steam conveyer pipe, the one end intercommunication of cooling steam pipe has the outlet pipe, the one end of outlet pipe has hot water tank through the circulating pump intercommunication, be provided with second pressure on the outlet pipe and detect meter and second control valve, the top intercommunication of hot water tank has the hot water inlet tube.
2. The device for reducing the coking and cooling of the esterification reboiler according to claim 1, wherein the top of the hot water tank is further communicated with a vent pipe.
3. The apparatus for reducing coking and cooling in an esterification reboiler of claim 1, further comprising: a reverse irrigation pipe;
one end of the reverse filling pipe is communicated with the cooling steam pipe, the other end of the reverse filling pipe is communicated with the hot water tank, and a third control valve is further arranged on the reverse filling pipe.
4. The device for reducing coking and cooling of the esterification reboiler according to claim 1, wherein a gas-liquid mixer is further disposed on the cooling steam pipe.
5. The apparatus for reducing coking and cooling in an esterification reboiler according to claim 1, wherein an overflow pipe is further communicated with one end of the hot water tank away from the esterification reboiler.
6. The apparatus of claim 1, wherein the hot water inlet pipe is a stainless steel pipe.
7. The apparatus according to claim 6, wherein a ball float valve is disposed in the hot water tank, and the hot water tank is connected to the hot water inlet pipe via the ball float valve.
8. The device for reducing coking and cooling of the esterification reboiler according to claim 1, wherein a stop valve is further disposed on the hot water inlet pipe.
9. The apparatus of claim 1, wherein the first pressure detector and the second pressure detector are pressure transducers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221039415.6U CN217612911U (en) | 2022-04-29 | 2022-04-29 | Reduce reboiler coking heat sink of esterifying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221039415.6U CN217612911U (en) | 2022-04-29 | 2022-04-29 | Reduce reboiler coking heat sink of esterifying |
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| CN217612911U true CN217612911U (en) | 2022-10-21 |
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| CN202221039415.6U Active CN217612911U (en) | 2022-04-29 | 2022-04-29 | Reduce reboiler coking heat sink of esterifying |
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