CN112980509A - Stabilize light hydrocarbon production and use refining plant with hydrocracking - Google Patents
Stabilize light hydrocarbon production and use refining plant with hydrocracking Download PDFInfo
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- CN112980509A CN112980509A CN202110465398.6A CN202110465398A CN112980509A CN 112980509 A CN112980509 A CN 112980509A CN 202110465398 A CN202110465398 A CN 202110465398A CN 112980509 A CN112980509 A CN 112980509A
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- hydrogen
- hydrocracking
- conveying pipeline
- pipeline
- heat absorption
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
- C10G67/02—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only plural serial stages only
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a refining device for hydrocracking for producing stable light hydrocarbon, which belongs to the field of hydrocracking and comprises a hydrogen conveying pipeline, a hydrocracking pretreatment reactor, an effluent conveying pipeline, a flash tank, a separated gas conveying pipeline, a separated liquid conveying pipeline, a hydrocracking reactor, a cracking reaction effluent conveying pipeline, a separator and a circulating hydrogen conveying pipeline, wherein the separated gas conveying pipeline is connected with a plurality of cold hydrogen conveying pipelines, a heat absorption pipe is spirally arranged on the cold hydrogen conveying pipeline, and a magnetic turbulent flow mechanism is arranged in the hydrogen conveying branch. The invention fully utilizes the height difference among the tower layers, absorbs the heat energy of the hydrogen discharged by the hydrocracking pretreatment reactor through the heat absorption pipe, and uses the heat energy for preheating new hydrogen and circulating hydrogen, thereby reducing the burden of heating equipment such as a heating furnace and the like, having good auxiliary effect on the temperature condition of light hydrocarbon production, and further reducing the energy consumption of the heating equipment such as the heating furnace and the like corresponding to the hydrocracking reactor.
Description
Technical Field
The invention belongs to the field of hydrocracking, and particularly relates to a hydrocracking refining device for producing stable light hydrocarbons.
Background
Hydrocracking is a process for producing various light fuel oils by catalytic processing of heavy feedstocks in the presence of a catalyst and hydrogen. In the two-stage hydrocracking process, cold hydrogen is mostly supplied after cooling by circulating hydrogen separated from a reaction product in the first stage, and the energy consumption of cooling equipment is higher.
Disclosure of Invention
The invention provides a refining device for hydrocracking for producing stable light hydrocarbon, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a hydrocracking refining device for producing stable light hydrocarbon comprises a hydrogen conveying pipeline, a hydrocracking pretreatment reactor, an effluent conveying pipeline, a flash tank, a separated gas conveying pipeline, a separated liquid conveying pipeline, a hydrocracking reactor, a cracking reaction effluent conveying pipeline, a separator and a circulating hydrogen conveying pipeline, wherein the separated gas conveying pipeline is connected with a plurality of cold hydrogen conveying pipelines, the cold hydrogen conveying pipelines are connected with inlets of cracking beds of the hydrocracking reactor, heat absorption pipes are spirally arranged on the cold hydrogen conveying pipelines, spiral turns of each heat absorption pipe form an equal-difference number array, one end of each heat absorption pipe is respectively connected with the same liquid inlet pipe, the liquid inlet pipe is connected with a liquid inlet of a pressure pump, the other end of each heat absorption pipe is respectively connected with the same liquid outlet pipe, a liquid outlet of the pressure pump is connected with the liquid outlet pipe through a hydrogen heating pipe, the hydrogen heating pipe is arranged in the hydrogen conveying pipeline, the hydrogen conveying pipeline is connected with the hydrocracking reactor through a hydrogen conveying branch line, the separated liquid conveying pipeline is connected with the hydrogen conveying branch line, and a magnetic turbulent flow mechanism is arranged in the hydrogen conveying branch line.
The refining device for hydrocracking for producing the stable light hydrocarbon comprises a ball body, wherein a plurality of annular grooves are formed in the periphery of the ball body, the middle of a hydrogen conveying branch line is of a spherical structure, the ball body is located in the spherical structure, a plurality of magnetic poles are fixedly installed on the periphery of the ball body, a magnetic ring is rotatably installed on the periphery of the hydrogen conveying branch line, the magnetic ring is coaxially connected with a gear ring, and the gear ring is meshed with a gear and is connected with a power device.
According to the refining device for hydrocracking for producing stable light hydrocarbon, the joint of the separation liquid conveying pipeline and the hydrogen conveying branch line is positioned below the ball, and the flow regulating valve is arranged below the joint of the separation liquid conveying pipeline and the hydrogen conveying branch line.
According to the refining device for hydrocracking for producing the stable light hydrocarbon, the hydrogen conveying pipeline is internally provided with the plurality of staggered U-shaped frames, the cross section of each U-shaped frame is of a C-shaped structure, and the hydrogen heating pipes sequentially bypass the U-shaped frames.
According to the refining device for hydrocracking for producing the stable light hydrocarbon, the heat absorption pipes are made of soft heat conduction materials, and the heat absorption pipes, the liquid inlet pipe and the liquid outlet pipe are wrapped with heat insulation materials.
The invention has the advantages that: the invention fully utilizes the height difference among the tower layers, absorbs the heat energy of the hydrogen discharged by the hydrocracking pretreatment reactor through the heat absorption pipe, and uses the heat energy for preheating new hydrogen and circulating hydrogen, and lightens the burden of heating equipment such as a heating furnace, and the like; the mixing of hydrogen and the separated liquid can be accelerated through the magnetic turbulence mechanism, the movement of the magnetic turbulence mechanism can enable the oil body to be combined with the hydrogen to generate bubbles, and after the bubbles enter the hydrocracking reactor, the combination of carbon atoms and hydrogen atoms is facilitated under the action of a catalyst, so that the content of heavy naphtha, heavy aromatic hydrocarbon and the like in the product is reduced; the movement of the magnetic turbulent mechanism generates heat by friction with oil bodies and hydrogen, and a good auxiliary effect can be achieved on the temperature condition of light hydrocarbon production, so that the energy consumption of heating equipment such as a heating furnace and the like corresponding to the hydrocracking reactor is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are 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 production flow diagram of the present invention; FIG. 2 is a schematic view showing a connection structure of a circulation line; FIG. 3 is a schematic structural view of a magnetic turbulent flow mechanism; FIG. 4 is a schematic view of the circulating hydrogen heating pipe and the U-shaped frame; fig. 5 is a schematic cross-sectional view of a U-shaped frame.
Reference numerals: 1. hydrogen conveying pipeline, 2, hydrocracking pretreatment reactor, 3, effluent conveying pipeline, 4, flash tank, 5, separated gas conveying pipeline, 6, separated liquid conveying pipeline, 7, hydrocracking reactor, 8, cracking reaction effluent conveying pipeline, 9, separator, 10, circulating hydrogen conveying pipeline, 11, cold hydrogen conveying pipeline, 12, heat absorbing pipe, 13, liquid inlet pipe, 14, pressure pump, 15, liquid outlet pipe, 16, hydrogen heating pipe, 17, hydrogen conveying branch line, 18, sphere, 19, annular groove, 20, magnetic pole, 21, magnetic ring, 22, gear ring, 23, gear, 24 and U-shaped frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
A refining device for hydrocracking for producing stable light hydrocarbon is shown in figure 1, which is a flow direction of materials during hydrofining and comprises a hydrogen conveying pipeline 1, a hydrocracking pretreatment reactor 2, an effluent conveying pipeline 3, a flash tank 4, a separated gas conveying pipeline 5, a separated liquid conveying pipeline 6, a hydrocracking reactor 7, a cracking reaction effluent conveying pipeline 8, a separator 9 and a circulating hydrogen conveying pipeline 10, wherein other structures such as a heating furnace, a cooling tower and the like and arrangement modes thereof are all installed by adopting the existing structures, the separated gas conveying pipeline 5 is connected with a plurality of cold hydrogen conveying pipelines 11, the cold hydrogen conveying pipeline 11 is connected with each cracking inlet bed layer of the hydrocracking reactor 7, a heat absorption pipe 12 is spirally arranged on the cold hydrogen conveying pipeline 11, the heat absorption pipe 12 is not communicated with the cold hydrogen conveying pipeline 11, the two ways of arrangement of the heat absorption pipe 12 are that one way is wound on the periphery of the cold hydrogen conveying pipeline 11, the cold hydrogen conveying pipeline 11 needs to be made of a heat-conducting material, so that the construction is convenient, but the heat-conducting efficiency is slightly low; secondly, the heat absorption pipe is wound on the inner wall of the cold hydrogen conveying pipeline 11, and two ends of the heat absorption pipe 12 need to penetrate through the cold hydrogen conveying pipeline 11 and be in sealing connection with the cold hydrogen conveying pipeline, so that the heat conduction efficiency is high, but the construction difficulty is slightly large; the pipe diameter and the spiral diameter of each heat absorption pipe 12 are the same, the spiral turns of each heat absorption pipe 12 form an equal-difference array, one end of each heat absorption pipe 12 is connected with the same liquid inlet pipe 13, the liquid inlet pipe 13 is connected with the liquid inlet of the pressure pump 14, the other end of each heat absorption pipe 12 is connected with the same liquid outlet pipe 15, the liquid outlet of the pressure pump 14 is connected with the liquid outlet pipe 15 through a hydrogen heating pipe 16, the heat absorption pipes 12, the liquid inlet pipe 13, the pressure pump 14, the liquid outlet pipe 15 and the hydrogen heating pipe 16 form a circulation pipeline together, the liquid inlet pipe 13, the pressure pump 14 and the liquid outlet pipe 15 are not shown in figure 1, the positions of the heat absorption pipes 12 and the hydrogen heating pipe 16 in the hydrofining process are only shown in figure 1, the hydrogen heating pipe 16 is arranged in the hydrogen conveying pipeline 1, similarly, the hydrogen conveying pipeline 1 is not communicated with the hydrogen conveying pipeline 17 and is connected with the hydrocracking reactor 7, the hydrogen heating pipe 16 is arranged at a position close to the hydrogen delivery branch 17, the separation liquid delivery pipeline 6 is connected with the hydrogen delivery branch 17, and a magnetic turbulent flow mechanism is arranged in the hydrogen delivery branch 17. The invention fully utilizes the height difference among the tower layers, absorbs the heat energy of the hydrogen discharged by the hydrocracking pretreatment reactor 2 through the heat absorption pipe 12, and uses the heat energy for preheating fresh hydrogen and circulating hydrogen, and lightens the burden of heating equipment such as a heating furnace, and the like, a cooling tower or other cooling equipment is arranged on the separation gas conveying pipeline 5, compared with the mode of firstly absorbing heat and then cooling, the requirement on the material of the heat absorption pipe 12 is lower, and the temperature of the cold hydrogen finally entering the hydrocracking reactor 7 is approximate by utilizing the length difference of the cold hydrogen conveying pipeline 11, so that the temperature of each tower layer can be maintained in an approximate interval, and the invention is also beneficial to reducing the introduction amount of the cold hydrogen and lightening the burden of the cooling equipment such as the cooling tower; the mixing of the hydrogen and the liquid obtained by separation can be accelerated through the magnetic turbulence mechanism, the movement of the magnetic turbulence mechanism can enable the oil body to be combined with the hydrogen to generate bubbles, and after the bubbles enter the hydrocracking reactor 7, the combination of carbon atoms and hydrogen atoms is facilitated under the action of a catalyst, so that the content of heavy naphtha, heavy aromatic hydrocarbon and the like in the product is reduced; the movement of the magnetic turbulent mechanism generates heat by friction with oil bodies and hydrogen, and a good auxiliary effect can be achieved on the temperature condition of light hydrocarbon production, so that the energy consumption of heating equipment such as a heating furnace corresponding to the hydrocracking reactor 7 is further reduced.
Specifically, as shown in fig. 3, the magnetic turbulent mechanism described in this embodiment includes a sphere 18, a plurality of annular grooves 19 are formed in the periphery of the sphere 18, two adjacent annular grooves 19 are uniformly spaced, the connecting line of the central points of the annular grooves 19 is oblique, the middle portion of the hydrogen delivery branch line 17 is a spherical structure, the sphere 18 is located in the spherical structure, a plurality of magnetic poles 20 are fixedly installed on the periphery of the sphere 18, the magnetic poles 20 are annularly arranged and uniformly spaced, the number of the magnetic poles 20 is at least 6, a magnetic ring 21 is rotatably installed on the periphery of the hydrogen delivery branch line 17, the magnetic ring 21 is opposite to the magnetic direction of the magnetic poles 20, the magnetic ring 21 is connected to the periphery of the hydrogen delivery branch line 17 through a bearing, the vertical length of the magnetic ring 21 is greater than the vertical length of the magnetic poles 20, so that the sphere 18 can still be located in the magnetic force interval of the magnetic, the power device is a low-speed motor, and the motor is fixed in position through a bracket and the like. The diameter of the gear ring 22 is far larger than that of the gear 23, the transmission ratio is reduced, the rotating speed of the magnetic ring 21 is further reduced, the preferred rotating speed interval is 60-90r/min, after the low-speed motor is started, the magnetic ring 21 can rotate, under the principle of 'homopolar repulsion', the ball 18 rotates, gas or liquid flowing through the surface of the ball 18 is stirred by the annular groove 19, the gas or liquid can be in a turbulent flow state, the structure can achieve the aim on the basis of ensuring that the sealing performance of the hydrogen conveying branch line 17 is not damaged, and the structure is very simple.
Specifically, the flow rate control valve is not shown in the figure, the connection point of the separation liquid delivery line 6 and the hydrogen delivery branch line 17 in the present embodiment is located below the ball 18, and the flow rate control valve is disposed below the connection point of the separation liquid delivery line 6 and the hydrogen delivery branch line 17. Firstly, closing a flow regulating valve to enable liquid separated by a flash tank 4 to enter a hydrocracking reactor 7 until the separated liquid overflows into a spherical structure, and arranging a liquid level monitoring sensor to monitor the liquid level height in the spherical structure, wherein the liquid level preferably overflows to one fourth to one third of a sphere 18, so that when the sphere 18 rotates, the liquid can be simultaneously stirred, then when hydrogen enters the spherical structure after being heated, the mixing of the liquid and the hydrogen can be accelerated, the mixing efficiency is improved, the mixing effect is further improved, and then the flow regulating valve is opened, so that the liquid level in the spherical structure is maintained in the interval in the process, and the opening and closing of valves on other pipelines are not described herein; or the liquid does not enter the spherical structure, the power device does not work, hydrogen enters the hydrogen conveying branch line 17 below the spherical structure after flowing through the annular groove 19, the flow channel of the hydrogen is compressed, the hydrogen flow rate can be further improved, the hydrogen can be collided to the liquid more rapidly, the shape of the liquid after entering the hydrogen conveying branch line 17 from the liquid separating conveying pipeline 6 can be dispersed, a wider contact liquid level is formed, and the liquid can be better mixed with the hydrogen.
Further, as shown in fig. 4 or 5, a plurality of U-shaped frames 24 are disposed in the hydrogen conveying pipeline 1 according to the present embodiment in a staggered manner, the cross section of the U-shaped frame 24 is a C-shaped structure, and the hydrogen heating pipes 16 sequentially bypass the U-shaped frames 24. The structure enables the hydrogen heating pipe 16 to be in a snake-shaped structure, so that the contact area with the hydrogen can be increased, and heat energy can be conducted to the hydrogen to complete preheating; the hydrogen heating pipe 16 may be provided in a spiral structure by other brackets.
Furthermore, the heat absorption tubes 12 in this embodiment are made of soft heat conductive materials, the circulation pipeline is filled with heat conductive oil, and the heat absorption tubes 12, the liquid inlet tube 13, and the liquid outlet tube 15 are wrapped with heat insulating materials. The soft heat conduction material such as high temperature resistant special silica gel and the like can be improved on the original production equipment, does not need to be completely dismantled, and has lower construction difficulty; the heat insulating material such as heat insulating cotton can prevent the heat energy absorbed by the heat absorbing pipe 12 from being dissipated to the outside, can prevent the sunlight from directly irradiating the heat absorbing pipe 12, and can delay the aging of the heat absorbing pipe 12.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a stabilize light hydrocarbon production with refining plant for hydrocracking, includes hydrogen pipeline (1), hydrocracking preliminary treatment reactor (2), effluent pipeline (3), flash drum (4), separation gas pipeline (5), separation liquid pipeline (6), hydrocracking reactor (7), cracking reaction effluent pipeline (8), separator (9) and circulation hydrogen pipeline (10), its characterized in that: the separation gas conveying pipeline (5) is connected with a plurality of cold hydrogen conveying pipelines (11), the cold hydrogen conveying pipelines (11) are connected with inlets of cracking beds of a hydrocracking reactor (7), heat absorption pipes (12) are spirally arranged on the cold hydrogen conveying pipelines (11), spiral turns of each heat absorption pipe (12) form an equal-difference number array, one end of each heat absorption pipe (12) is connected with the same liquid inlet pipe (13), the liquid inlet pipe (13) is connected with a liquid inlet of a booster pump (14), the other end of each heat absorption pipe (12) is connected with the same liquid outlet pipe (15), a liquid outlet of the booster pump (14) is connected with the liquid outlet pipes (15) through hydrogen heating pipes (16), the hydrogen heating pipes (16) are arranged in the hydrogen conveying pipeline (1), the hydrogen conveying pipeline (1) is connected with the hydrocracking reactor (7) through a hydrogen conveying branch line (17), the separation liquid conveying pipeline (6) is connected with a hydrogen conveying branch line (17), the hydrogen conveying branch line (17) is internally provided with a magnetic turbulent flow mechanism.
2. The refining unit for hydrocracking of stable light hydrocarbon production according to claim 1, wherein: the magnetic turbulent flow mechanism comprises a ball body (18), a plurality of annular grooves (19) are formed in the periphery of the ball body (18), the middle of a hydrogen conveying branch line (17) is of a spherical structure, the ball body (18) is located in the spherical structure, a plurality of magnetic poles (20) are fixedly installed in the periphery of the ball body (18), a magnetic ring (21) is rotatably installed in the periphery of the hydrogen conveying branch line (17), the magnetic ring (21) is coaxially connected with a gear ring (22), the gear ring (22) is meshed with a gear (23), and the gear (23) is connected with a power device.
3. The refining unit for hydrocracking of stable light hydrocarbon production according to claim 2, wherein: the joint of the separation liquid conveying pipeline (6) and the hydrogen conveying branch line (17) is positioned below the ball body (18), and a flow regulating valve is arranged below the joint of the separation liquid conveying pipeline (6) and the hydrogen conveying branch line (17).
4. The refining unit for hydrocracking of stable light hydrocarbon production according to claim 1, 2 or 3, wherein: a plurality of U-shaped frames (24) which are arranged in a staggered mode are arranged in the hydrogen conveying pipeline (1), the cross section of each U-shaped frame (24) is of a C-shaped structure, and the hydrogen heating pipes (16) bypass the U-shaped frames (24) in sequence.
5. The refining unit for hydrocracking of stable light hydrocarbon production according to claim 1, 2 or 3, wherein: the heat absorption pipes (12) are made of soft heat conduction materials, and the peripheries of the heat absorption pipes (12), the liquid inlet pipe (13) and the liquid outlet pipe (15) are wrapped with heat insulation materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110465398.6A CN112980509B (en) | 2021-04-28 | 2021-04-28 | Stabilize light hydrocarbon production and use refining plant with hydrocracking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110465398.6A CN112980509B (en) | 2021-04-28 | 2021-04-28 | Stabilize light hydrocarbon production and use refining plant with hydrocracking |
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| CN112980509A true CN112980509A (en) | 2021-06-18 |
| CN112980509B CN112980509B (en) | 2021-07-30 |
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Citations (6)
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| US6445180B1 (en) * | 2000-06-28 | 2002-09-03 | Baker Hughes Incorporated | Nuclear magnetic resonance tool with active RF spoiler antenna |
| CN1940028A (en) * | 2005-09-28 | 2007-04-04 | 中国石油化工股份有限公司 | Diesel fraction deep desulfurization and decoloring hydrogenation |
| TWM515910U (en) * | 2015-08-18 | 2016-01-21 | Manz Taiwan Ltd | Gas-liquid mixing structure and process equipment |
| CN109777509A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of two-segment hydrocracking method |
| CN209080208U (en) * | 2018-10-25 | 2019-07-09 | 灵谷化工有限公司 | A kind of inner wrapping equipment for chemical production line |
| CN112325674A (en) * | 2020-11-26 | 2021-02-05 | 浙江广涛卫厨有限公司 | Surrounding type heat exchanger |
-
2021
- 2021-04-28 CN CN202110465398.6A patent/CN112980509B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6445180B1 (en) * | 2000-06-28 | 2002-09-03 | Baker Hughes Incorporated | Nuclear magnetic resonance tool with active RF spoiler antenna |
| CN1940028A (en) * | 2005-09-28 | 2007-04-04 | 中国石油化工股份有限公司 | Diesel fraction deep desulfurization and decoloring hydrogenation |
| TWM515910U (en) * | 2015-08-18 | 2016-01-21 | Manz Taiwan Ltd | Gas-liquid mixing structure and process equipment |
| CN109777509A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of two-segment hydrocracking method |
| CN209080208U (en) * | 2018-10-25 | 2019-07-09 | 灵谷化工有限公司 | A kind of inner wrapping equipment for chemical production line |
| CN112325674A (en) * | 2020-11-26 | 2021-02-05 | 浙江广涛卫厨有限公司 | Surrounding type heat exchanger |
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