CN209854026U - Novel propane dehydrogenation system propylene economizer system - Google Patents
Novel propane dehydrogenation system propylene economizer system Download PDFInfo
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- CN209854026U CN209854026U CN201920648277.3U CN201920648277U CN209854026U CN 209854026 U CN209854026 U CN 209854026U CN 201920648277 U CN201920648277 U CN 201920648277U CN 209854026 U CN209854026 U CN 209854026U
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Abstract
The utility model provides a novel propane dehydrogenation system propylene economizer system relates to chemical plant technical field to the propane dehydrogenation system propylene device that exists among the solution prior art both need consume the circulating water cooling, still needs steam heating, leads to the use amount increase of steam and circulating water, unsatisfied energy saving and consumption reduction, the technical problem of green friendly production requirement, the device includes propane gasification system and first return system, wherein: the propane gasification system comprises a deoiling tower and a propane raw material gasifier, wherein a gas-phase propane outlet is formed in the tower top of the deoiling tower and is communicated with an inlet of the propane raw material gasifier through a first pipeline; first return flow system includes propane raw materials heater, and the export of propane raw materials heater passes through the return line entry of first return line intercommunication deoiling tower, the utility model is used for propane dehydrogenation system propylene in-process energy saving and consumption reduction.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry technique and specifically relates to a novel propane dehydrogenation system propylene economizer system that makes.
Background
The device for preparing propylene by propane dehydrogenation adopts the catefin process technology of Lummus company in the United states, and the applicant finds that the prior art has at least the following technical problems:
1. in the process, the gasification heat source required by the raw material gasification tank is hot propylene at the three-stage outlet of a propylene compressor, the gas-phase hot propylene at the four-stage outlet of the propylene machine is also used as a heat source of a reboiler at the tower bottom of the product separation tower, and if the tower bottom of the product separation tower needs to be additionally heated, the steam of 0.35Mpag is required for supplement;
2. in the process, gas-phase propane at the top of a deoiling tower is cooled by circulating water and then condensed into liquid-phase propane, the liquid-phase propane flows into a raw material gasification tank by means of pressure difference, enters the raw material gasification tank and needs to be heated by hot propylene, the cold and the hot water need to consume the circulating water for cooling and also need to be heated by steam, the consumption of the steam and the circulating water is increased, and the production requirements of energy conservation, consumption reduction and environmental friendliness are not met.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a neotype propane dehydrogenation system propylene economizer system to the propane dehydrogenation system propylene device that exists among the solution prior art both need consume the circulating water cooling, still needs steam heating, leads to the use amount increase of steam and circulating water, unsatisfied energy saving and consumption reduction, the technical problem of green friendly production requirement. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a pair of novel propane dehydrogenation system propylene economizer system, including propane gasification system and first return system, wherein:
the propane gasification system comprises a deoiling tower and a propane raw material gasifier, wherein a gas-phase propane outlet is formed in the tower top of the deoiling tower and is communicated with an outlet of the propane raw material gasifier through a first pipeline;
the first return system comprises a propane raw material heater, and an outlet of the propane raw material heater is communicated with an inlet of a return pipeline of the deoiling tower through a first return pipeline.
Preferably, the device further comprises a first control valve, and the first control valve is arranged on the first pipeline.
Preferably, a second reflux system is also included, the second reflux system comprising a condenser and a reflux drum, wherein:
a gas-phase propane outlet at the top of the deoiling tower is communicated with an inlet of the condenser through a second pipeline;
an outlet of the condenser is communicated with a first inlet of the reflux tank through a second reflux pipeline, and a pressure regulating valve is arranged on the second reflux pipeline;
and the outlet of the reflux tank is communicated with the inlet of the reflux pipeline of the deoiling tower through the first outlet of the third reflux pipeline.
Preferably, the system further comprises a second control valve and a first flow meter, wherein the second control valve and the first flow meter are arranged on the return pipeline.
Preferably, a reflux pump is arranged on the third reflux pipeline.
Preferably, the second outlet of the third return line communicates with the second inlet of the return tank through a fourth return line.
Preferably, a first regulating valve and a second flow meter are arranged on the fourth return pipeline.
Preferably, the system further comprises a raw material evaporating pot, wherein a first inlet of the raw material evaporating pot is communicated with the first pipeline, and an outlet of the raw material evaporating pot is communicated with an inlet of the propane raw material gasifier through a second pipeline.
Preferably, the outlet of the propane raw material gasifier is communicated with the second inlet of the raw material evaporation tank through a third pipeline.
Preferably, the top of the raw material evaporation tank is provided with a gas-phase propane outlet.
The utility model provides a novel propane dehydrogenation system propylene economizer system, deoiling tower top gaseous phase directly gets into propane raw materials vaporizer top through pressure regulating valve without the condensation, make deoiling tower top gaseous phase remove propane raw materials vaporizer completely, and need not the condensation, thereby reduce the use amount of circulating water, simultaneously because top of the tower backward flow jar no longer has liquid phase propane, the entry of backward flow pipeline intercommunication deoiling tower is passed through in the export through setting up propane raw materials heater, need not use the former backwash pump of deoiling tower, most electric energy has been saved, reach energy saving and consumption reduction, green friendly production requirement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the energy-saving system for producing propylene by propane dehydrogenation of the present invention;
in the figure: 1. a deoiling tower; 2. a return line; 3. a propane feedstock gasifier; 4. a propane feed heater; 6. a condenser; 7. a reflux tank; 9. a raw material evaporating pot; 10. a reflux pump; 11. a first pipeline; 12. a second pipeline; 13. a third pipeline; 21. a first return line; 22. a second return line; 23. a third return line; 24. a fourth return line; 51. a first control valve; 52. a second control valve; 53. a first regulating valve; 81. a first flow meter; 82. a second flow meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model provides a novel propane dehydrogenation system of economizing on energy of propylene, figure 1 is the schematic structure of this embodiment, as shown in figure 1, including propane gasification system and first return system, wherein:
the propane gasification system comprises a deoiling tower 1 and a propane raw material gasifier 3, wherein a gas-phase propane outlet is formed in the top of the deoiling tower 1, the gas-phase propane outlet is communicated with an outlet of the propane raw material gasifier 3 through a first pipeline 11, and the gas phase at the top of the deoiling tower directly enters the propane raw material gasifier 3 through a pressure regulating valve without being condensed, so that the gas phase at the top of the deoiling tower is completely removed to the propane raw material gasifier 3 without being condensed, the circulating water of a condenser at the top of the deoiling tower can be stopped, and the water can be saved by about 470 hours;
because the temperature of the top of the deoiling tower is about 44 ℃, and the gas phase temperature of the propane raw material gasifier 3 is about 13 ℃, when the gas phase at the top of the deoiling tower directly enters the propane raw material gasifier 3, the heat required for gasifying the liquid-phase propane of the propane raw material gasifier 3 can be reduced, the heat originally comes from the gas-phase hot propylene at the three-stage outlet of the propylene compressor, when the heat requirement is reduced, namely the flow of the three-stage outlet of the propylene compressor is reduced, in order to maintain balance, the flow of the four-stage outlet of the propylene compressor can be correspondingly increased, and the four-stage outlet of the propylene compressor is directed to the product tower kettle reboiler in a winter mode, most of the heat required for removing the reboiler is increased, according to the energy balance principle, the additionally supplemented steam quantity required by the product tower kettle is reduced, and the steam of 6t/h can be saved to the.
The first reflux system comprises a propane raw material heater 4, an outlet of the propane raw material heater 4 is communicated with an inlet of a reflux pipeline 2 of the deoiling tower through a first reflux pipeline 21, liquid-phase propane does not exist in a tower top reflux tank any more after circulating water is stopped, an outlet of the propane raw material heater is communicated with an inlet of the deoiling tower through the reflux pipeline, a reflux line is added equivalently through the first reflux system, a strand of propane (with the temperature of 20 ℃ and the pressure of 2.0Mpag) is led out from an outlet of the low-temperature raw material propane heater to the top of the deoiling tower to serve as reflux, and therefore an original reflux pump of the deoiling tower can be stopped, the electric quantity of 18KW.H can be saved every hour, 470t/h of circulating water can be saved finally, and 6t/h of steam and the electric quantity of 18KW.H every hour can.
As an optional embodiment, a first control valve 51 is further included, the first control valve 51 is disposed on the first pipeline 11, and when in use, the first control valve 51 is used for controlling the condition that the gas-phase propane at the outlet of the top of the deoiling tower 1 enters the raw material evaporation tank 9.
In an optional embodiment, the system further comprises a second backflow system, the second backflow system and the first backflow system are mutually used as a standby backflow system, and when the first backflow system is used, a control valve of the second backflow system is closed.
Specifically, the second reflux system in this embodiment includes a condenser 6 and a reflux drum 7, wherein a gas-phase propane outlet at the top of the deoiling tower is communicated with an inlet of the condenser 6 through a second pipeline 12, and after the gas-phase propane is condensed by the condenser 6, the liquid-phase propane is discharged through an outlet of the condenser 6.
The export of condenser 6 passes through the first entry intercommunication of second return line 22 with return tank 7, is equipped with the pressure control valve on the second return line for control liquid phase propane gets into the pressure of return tank 7, and liquid phase propane reentries the return line 2 of deoiling tower after return tank 7, and wherein, the export of return tank 7 passes through the 2 entries of return line of the first export intercommunication deoiling tower of third return line 23, and the exit of return tank 7 is equipped with return tank export trip valve.
As an optional embodiment, the system further comprises a second control valve 52 and a first flow meter 81, and the second control valve 52 and the first flow meter 81 are arranged on the return pipeline 2, wherein the second control valve 52 is used as a return automatic control valve of the deoiling tower and is used for controlling the return, and the first flow meter 81 is arranged and is used for detecting the flow of the return in real time, so that the system is convenient to use and simple to operate.
As an optional implementation manner, a reflux pump 10 is disposed on the third reflux pipeline 23, and a pressure gauge is disposed at an outlet of the reflux pump 10 and is used for detecting the pressure on the third reflux pipeline 23.
In an alternative embodiment, the second outlet of the third return line 23 communicates with the second inlet of the return tank 7 through the fourth return line 24, and the third return line 23, the fourth return line 24 and the return tank 7 form a circulation and return system, wherein the fourth return line is provided with a first regulating valve 53 and a second flow meter 82, the first regulating valve 53 is set as a minimum return automatic regulating valve, and the second flow meter 82 is set as a minimum return flow meter.
As an optional embodiment, a raw material evaporation tank 9 is further included, a first inlet of the raw material evaporation tank 9 is communicated with a first pipeline 11, and an outlet of the raw material evaporation tank 9 is communicated with an inlet of the propane raw material gasifier 3 through a second pipeline 12.
As an alternative embodiment, the outlet of the propane raw material vaporizer 3 is communicated with the second inlet of the raw material evaporation tank 9 through a third pipeline 13, and the top of the raw material evaporation tank 9 is provided with a gas-phase propane outlet.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a novel propane dehydrogenation system of economizing on energy of propylene which characterized in that, includes propane gasification system and first return system, wherein:
the propane gasification system comprises a deoiling tower and a propane raw material gasifier, wherein a gas-phase propane outlet is formed in the tower top of the deoiling tower and is communicated with an outlet of the propane raw material gasifier through a first pipeline;
the first return system comprises a propane raw material heater, and an outlet of the propane raw material heater is communicated with an inlet of a return pipeline of the deoiling tower through a first return pipeline.
2. The novel energy-saving system for preparing propylene by propane dehydrogenation according to claim 1, characterized in that: still include first control valve, first control valve sets up in on the first pipeline.
3. The novel propane dehydrogenation propylene energy-saving system according to claim 1 or 2, further comprising a second reflux system, the second reflux system comprising a condenser and a reflux drum, wherein:
a gas-phase propane outlet at the top of the deoiling tower is communicated with an inlet of the condenser through a second pipeline;
an outlet of the condenser is communicated with a first inlet of the reflux tank through a second reflux pipeline, and a pressure regulating valve is arranged on the second reflux pipeline;
and the outlet of the reflux tank is communicated with the inlet of the reflux pipeline of the deoiling tower through the first outlet of the third reflux pipeline.
4. The novel energy-saving system for preparing propylene by propane dehydrogenation, according to claim 3, is characterized in that: the flow meter also comprises a second control valve and a first flow meter, wherein the second control valve and the first flow meter are arranged on the return pipeline.
5. The novel energy-saving system for preparing propylene by propane dehydrogenation, according to claim 4, is characterized in that: and a reflux pump is arranged on the third reflux pipeline.
6. The novel energy-saving system for preparing propylene by propane dehydrogenation, according to claim 3, is characterized in that: and a second outlet of the third return pipeline is communicated with a second inlet of the return tank through a fourth return pipeline.
7. The novel energy-saving system for preparing propylene by propane dehydrogenation, according to claim 6, is characterized in that: and a first regulating valve and a second flowmeter are arranged on the fourth return pipeline.
8. The novel energy-saving system for preparing propylene by propane dehydrogenation, according to claim 3, is characterized in that: still include the raw materials evaporating pot, the first entry of raw materials evaporating pot with first pipeline intercommunication, the export of raw materials evaporating pot passes through the second pipeline intercommunication the entry of propane raw materials vaporizer.
9. The novel energy-saving system for preparing propylene by propane dehydrogenation according to claim 8, characterized in that: and the outlet of the propane raw material gasifier is communicated with the second inlet of the raw material evaporation tank through a third pipeline.
10. The novel energy-saving system for preparing propylene by propane dehydrogenation according to claim 8 or 9, characterized in that: and a gas-phase propane outlet is formed in the top of the raw material evaporation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920648277.3U CN209854026U (en) | 2019-05-07 | 2019-05-07 | Novel propane dehydrogenation system propylene economizer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920648277.3U CN209854026U (en) | 2019-05-07 | 2019-05-07 | Novel propane dehydrogenation system propylene economizer system |
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| Publication Number | Publication Date |
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| CN209854026U true CN209854026U (en) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920648277.3U Active CN209854026U (en) | 2019-05-07 | 2019-05-07 | Novel propane dehydrogenation system propylene economizer system |
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| CN (1) | CN209854026U (en) |
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- 2019-05-07 CN CN201920648277.3U patent/CN209854026U/en active Active
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