CN116120962A - Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device - Google Patents

Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device Download PDF

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Publication number
CN116120962A
CN116120962A CN202310118591.1A CN202310118591A CN116120962A CN 116120962 A CN116120962 A CN 116120962A CN 202310118591 A CN202310118591 A CN 202310118591A CN 116120962 A CN116120962 A CN 116120962A
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CN
China
Prior art keywords
gas
cold low
flushing
reverse
pressure
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Pending
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CN202310118591.1A
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Chinese (zh)
Inventor
韩金奇
刘汉英
马达国
曹坚
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Beijing Petrochemical Engineering Co Ltd
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Beijing Petrochemical Engineering Co Ltd
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Priority to CN202310118591.1A priority Critical patent/CN116120962A/en
Publication of CN116120962A publication Critical patent/CN116120962A/en
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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
    • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
    • C10G31/09—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses a cold low-pressure gas-separation back-flushing filtering method and a device for an oil product hydrogenation device, which are used for carrying out back-flushing filtering on an automatic back-flushing filter connected with the oil product hydrogenation device, wherein the method comprises the following steps: taking cold low-pressure gas generated by a cold low-pressure separator of the oil hydrogenation device as a reverse sweeping medium, and carrying out buffer treatment on the reverse sweeping medium; and then the back-flushing medium after the buffer treatment is introduced into the automatic back-flushing filter to carry out back-flushing filtering operation. The invention can automatically reverse-purge the filter element to be regenerated by using cold low-pressure gas to replace the traditional automatic back-purge of the filtered oil, thereby greatly reducing the production of dirty oil and optimizing the reverse-purge process of the automatic reverse-purge filter.

Description

Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device
Technical Field
The invention relates to the technical field of petrochemical processing equipment, in particular to a cold low-pressure gas-separation back-flushing filtration method and device for an oil hydrogenation device.
Background
The oil products processed by the oil product hydrogenation device (comprising hydrofining and hydrocracking) comprise gasoline, diesel oil, wax oil, residual oil, coal tar and the like. The hydrogenation catalyst generally needs to be provided with an automatic back-flushing filter to filter the raw oil under the requirement of the hydrogenation catalyst on the property of the raw oil. The conventional automatic back-flushing filter of the oil product hydrogenation device adopts filtered oil as a back flushing medium of the filter element, when the pressure difference between the inlet and outlet of a certain filter element is increased to a set value, a certain amount of filter residues are accumulated on the surface of the filter element, the filter element is required to be back flushed, the purpose of removing the filter residues on the surface of the filter element is achieved, and the regeneration of the filter element is realized. Because the back flushing is carried out by using the filtered oil, the filtered oil can be mixed with filter residues to generate more dirty oil, and the loss of the filtered oil is caused.
Disclosure of Invention
The invention aims to provide a cold low-pressure gas reverse-flushing filtering method and device for an oil hydrogenation device, which are used for automatically reverse-flushing and regenerating a filter element to be regenerated by using cold low-pressure gas instead of the traditional automatic back flushing of filtered oil, so that the production amount of dirty oil can be greatly reduced, and the reverse-flushing process of the automatic reverse-flushing and cleaning filter is optimized.
The implementation purpose of the invention is mainly realized by the following technical scheme:
a cold low-split gas reverse-flushing filtration method for an oil hydrogenation device, for reverse-flushing filtration of an automatic reverse-flushing filter connected to the oil hydrogenation device, the method comprising:
taking cold low-pressure gas generated by a cold low-pressure separator of the oil hydrogenation device as a reverse sweeping medium, and carrying out buffer treatment on the reverse sweeping medium;
and introducing the back-flushing medium subjected to buffer treatment into the automatic back-flushing filter to carry out back-flushing filtering operation.
In a preferred embodiment of the invention, the cold low-split gas back-flushing filtration method for the oil hydrogenation device further comprises the following steps:
carrying out gas-liquid separation treatment on the gas-liquid mixed filter residues generated by the automatic back-flushing filter; wherein,,
the cold low-pressure gas separated by gas-liquid separation treatment is used as fuel;
and collecting and treating the liquid filter residue separated by the gas-liquid separation treatment.
The invention also provides a cold low-pressure gas-separation back-flushing filtering device for the oil product hydrogenation device, which comprises a cold low-pressure gas-separation buffer tank, an automatic back-flushing filter and a gas-liquid separation tank which are sequentially connected, wherein the outlet of the cold low-pressure separator of the oil product hydrogenation device is connected with the inlet of the cold low-pressure gas-separation buffer tank.
In a preferred embodiment of the invention, the gas outlet of the gas-liquid separation tank is connected to a fuel gas pipe network.
In a preferred embodiment of the invention, a fuel gas buffer tank is arranged between the gas outlet of the gas-liquid separation tank and the fuel gas pipe network.
In a preferred embodiment of the invention, the liquid outlet of the gas-liquid separation tank is connected to a dirty tank or reservoir.
In a preferred embodiment of the present invention, a pressure regulating valve is provided between the cold low pressure separator and the cold low-pressure buffer tank.
In a preferred embodiment of the invention, the top of the cold low-split buffer tank is provided with a safety valve.
In a preferred embodiment of the invention, a liquid level gauge is arranged at the bottom of the gas-liquid separation tank.
In a preferred embodiment of the present invention, the inlet of the gas-liquid separation tank extends in a direction parallel to a tangential direction of the gas-liquid separation tank, and an annular baffle is provided inside the gas-liquid separation tank.
Compared with the prior art, the technical scheme provided by the invention has the following characteristics and advantages:
the cold low-pressure gas separation reverse-blowing filtering method and device for the oil hydrogenation device utilize the cold low-pressure gas separation generated by the cold low-pressure separator of the oil hydrogenation device as a reverse-blowing medium to carry out reverse-blowing filtering on the filter element of the automatic reverse-blowing filter, replace the traditional mode of carrying out reverse-blowing filtering by utilizing filtered oil, avoid waste caused by back flushing of the filtered oil, reduce the generation amount of dirty oil and do not need additional power in the whole process.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a flow chart of the cold low-pressure gas separation automatic back-flushing filtering method for the oil hydrogenation device;
FIG. 2 is a block diagram of the cold low-split gas automatic reverse purging filter device for the oil hydrogenation device.
Reference numerals illustrate:
10. a cold low pressure separator; 20. a cold low-split buffer tank; 21. a safety valve; 30. automatically back-flushing the filter; 31. a filter line; 311. a filtration inlet; 312. a filter outlet; 32. back flushing the pipeline; 321. a back-flushing inlet; 322. a reverse purge outlet; 40. a gas-liquid separation tank; 41. a gas outlet; 42. a liquid outlet; 43. a liquid level gauge; 44. an annular baffle; 50. a fuel gas pipe network; 60. a dirty oil tank or reservoir; 70. a pressure regulating valve; 80. a fuel gas buffer tank;
A. back-flushing the medium; a', reversely sweeping the medium; B. mixing gas and liquid, and filtering residues; C. filtering the liquid filter residue; D. separating gas; E. hydrogenation raw oil; F. filtering the oil.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Embodiment one:
a cold low-split gas reverse-flushing filtration method for an oil hydrogenation device for reverse-flushing filtration of an automatic reverse-flushing filter 30 connected to the oil hydrogenation device, as shown in fig. 1, the method comprising:
taking cold low-pressure gas generated by a cold low-pressure separator 10 of an oil hydrogenation device as a reverse sweeping medium A, and carrying out buffer treatment on the reverse sweeping medium A;
and (3) introducing the back-flushing medium A' subjected to the buffer treatment into an automatic back-flushing filter 30 to carry out back-flushing filtering operation.
In the method, the cold low-pressure gas generated by the cold low-pressure separator 10 is used as the reverse sweeping medium A, so that the traditional mode that filtered oil is used as the reverse sweeping medium A is replaced, the waste caused by back flushing of the filtered oil is avoided, and the generation amount of dirty oil is reduced; meanwhile, the automatic back-flushing filter 30 is prevented from being reversely flushed and cleaned through gas by independently arranging a gas pipeline, and the back-flushing operation is directly performed by using the pressure of the cold low-pressure gas without providing external power. In addition, the buffer treatment is carried out before the cold low-pressure gas is introduced into the automatic back-flushing filter 30, so that the speed and the pressure of the cold low-pressure gas can be stabilized, and the stability of the back-flushing filtering operation is ensured.
In one possible embodiment of the present invention, the cold low-split reverse-blowing filtration method for the oil hydrogenation device further comprises:
carrying out gas-liquid separation treatment on the gas-liquid mixed filter residue B generated by the automatic back-flushing filter 30; wherein, the separated gas D separated by gas-liquid separation treatment is used as fuel; and collecting and treating the liquid filter residue C separated by the gas-liquid separation treatment.
The gas-liquid separation treatment is carried out on the gas-liquid mixed filter residue B generated after the back-flushing operation is carried out on the automatic back-flushing filter 30, the separated separation gas D is used as fuel, the separated liquid filter residue C is collected, the gas-liquid mixed filter residue B can be reused, and the waste of resources is effectively avoided.
Embodiment two:
the present invention also provides an apparatus for implementing the method in the first embodiment, as shown in fig. 2, the cold low-pressure separator 10 of the oil hydrogenation apparatus comprises a cold low-pressure buffer tank 20, an automatic reverse-flushing filter 30 and a gas-liquid separation tank 40 which are sequentially connected, wherein the outlet of the cold low-pressure buffer tank 20 is connected with the inlet of the cold low-pressure separator 10.
The device can realize that the cold low-pressure gas generated by the cold low-pressure separator 10 is buffered through the cold low-pressure gas buffer tank 20, the speed and the pressure of the cold low-pressure gas are stabilized, then the cold low-pressure gas is introduced into the automatic back-flushing filter 30 for back-flushing filtering operation, the gas-liquid separation tank 40 is used for carrying out gas-liquid separation treatment on the generated gas-liquid mixed filter residues B, and the separated gas-liquid mixed filter residues are utilized to improve the utilization rate of resources. The device replaces the automatic back-flushing filter 30 with the cold low-pressure gas to carry out back-flushing filtering operation on the filtered oil F, thereby avoiding waste caused by back flushing of the filtered oil and reducing the production amount of dirty oil.
Specifically, as shown in fig. 1, a conventional oil hydrogenation apparatus (not shown in the drawing) is connected with an automatic back flushing filter 30, a filtering pipeline 31 and a back flushing pipeline 32 are connected to the automatic back flushing filter 30, and in a normal working state, the filtering pipeline 31 of the automatic back flushing filter 30 works, hydrogenated raw oil E generated by the oil hydrogenation apparatus enters the automatic back flushing filter 30 through a filtering inlet 311 to be filtered, and filtered oil F generated by the filtering flows out through a filtering outlet 312. After the automatic back flushing filter 30 works for a certain period of time, a large amount of impurities adhere to the filter core inside the automatic back flushing filter 30, at this time, the back flushing pipeline 32 of the automatic back flushing filter 30 is required to work, the back flushing medium A' buffered by the cold low-pressure gas buffer tank 20 is introduced into the automatic back flushing filter 30 through the back flushing inlet 321 to carry out back flushing operation, and the generated gas-liquid mixed filter residues B flow out through the back flushing outlet 322. The back-flushing process of the automatic back-flushing filter 30 is specifically set by the manufacturer of the automatic back-flushing filter 30, and is automatically controlled and automatically back-flushed.
In this embodiment, the outlet of the cold low pressure separator 10 of the oil hydrogenation apparatus is connected to the inlet of the cold low pressure gas separation buffer tank 20, the cold low pressure gas produced by the cold low pressure separator 10 is used as the reverse purging medium a, after the cold low pressure gas enters the cold low pressure gas separation buffer tank 20 to perform buffering and pressure stabilization, the reverse purging medium a' flowing out through the outlet at the top of the cold low pressure gas separation buffer tank 20 enters the automatic reverse purging filter 30 through the reverse purging inlet 321 to perform reverse purging operation, and the produced gas-liquid mixed filter residues B flow out through the reverse purging outlet 322.
In one possible embodiment of the invention, as shown in fig. 2, the gas outlet 41 of the gas-liquid separation tank 40 is connected to a fuel gas pipe network 50.
The gas-liquid separation tank 40 can separate the separation gas D and the liquid filter residue C in the gas-liquid mixed filter residue B, and the separated separation gas D enters the fuel gas pipe network 50 through the gas outlet 41 of the gas-liquid separation tank 40 to be used as fuel, so that the separation gas D can be effectively utilized.
In one possible embodiment of the invention, as shown in fig. 2, a fuel gas buffer tank 80 is provided between the gas outlet 41 of the gas-liquid separation tank 40 and the fuel gas piping network 50. The fuel gas buffer tank 80 is arranged at the gas outlet 41 of the gas-liquid separation tank 40, so that the speed and the pressure of cold low-pressure gas can be stabilized, and the use safety of the fuel gas pipe network 50 is ensured.
In one possible embodiment of the invention, as shown in FIG. 2, the liquid outlet 42 of the gas-liquid separation tank 40 is connected to a dirty oil tank or reservoir 60. The liquid filter residue C is discharged from the bottom of the gas-liquid separation tank 40 to an underground sewage tank owned by the hydrogenation device or is pumped to a specific storage tank.
In one possible embodiment of the invention, as shown in fig. 2, a pressure regulating valve 70 is provided between the cold low pressure separator 10 and the cold low split buffer tank 20. The pressure regulating valve 70 can regulate the pressure of the cold low-pressure split gas to a safe operating range of the cold low-pressure split buffer tank 20.
In one possible embodiment of the invention, as shown in fig. 2, the top of the cold low-split buffer tank 20 is provided with a safety valve 21. The safety valve 21 on the cold low-split buffer tank 20 can prevent overpressure and ensure stable operation of the cold low-split buffer tank 20.
In one possible embodiment of the invention, as shown in fig. 2, the bottom of the gas-liquid separation tank 40 is provided with a level gauge 43. The liquid level meter 43 may display the height of the liquid residue C accumulated at the bottom of the gas-liquid separation tank 40, and may discharge the liquid residue C to an underground sewage tank owned by the hydrogenation apparatus when a certain amount of the liquid residue C is accumulated, or may send the liquid residue C to a specific storage tank via a pump.
In one possible embodiment of the present invention, as shown in fig. 2, the inlet of the gas-liquid separation tank 40 extends in a direction parallel to the tangential direction of the gas-liquid separation tank 40, and an annular baffle 44 is provided inside the gas-liquid separation tank 40. Tangential feed of the gas-liquid separation tank 40 can improve the effect of gas-liquid separation; meanwhile, the annular baffle plate 44 in the gas-liquid separation tank 40 can also strengthen the gas-liquid separation effect and avoid gas phase liquid.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. A cold low-split gas reverse-flushing filtration method for an oil hydrogenation device, characterized by being used for reverse-flushing filtration of an automatic reverse-flushing filter connected with the oil hydrogenation device, the method comprising:
taking cold low-pressure gas generated by a cold low-pressure separator of the oil hydrogenation device as a reverse sweeping medium, and carrying out buffer treatment on the reverse sweeping medium;
and introducing the back-flushing medium subjected to buffer treatment into the automatic back-flushing filter to carry out back-flushing filtering operation.
2. The cold low-split reverse-blowing filtration method for an oil hydrogenation apparatus according to claim 1, further comprising:
carrying out gas-liquid separation treatment on the gas-liquid mixed filter residues generated by the automatic back-flushing filter; wherein,,
the cold low-pressure gas separated by gas-liquid separation treatment is used as fuel;
and collecting and treating the liquid filter residue separated by the gas-liquid separation treatment.
3. A cold low-pressure separator reverse-flushing filter device for an oil hydrogenation device for implementing the method as claimed in claim 1 or 2, which is characterized by comprising a cold low-pressure gas buffer tank, an automatic reverse-flushing filter and a gas-liquid separation tank which are connected in sequence, wherein the outlet of the cold low-pressure separator of the oil hydrogenation device is connected with the inlet of the cold low-pressure gas buffer tank.
4. A cold low-pressure gas-separation back-flushing filtering device for an oil hydrogenation device according to claim 3, wherein a gas outlet of the gas-liquid separation tank is connected with a fuel gas pipe network.
5. The cold low-split reverse-flushing filtration device for an oil hydrogenation apparatus according to claim 4, wherein a fuel gas buffer tank is provided between the gas outlet of the gas-liquid separation tank and the fuel gas pipe network.
6. A cold low-pressure gas-separation reverse-flushing filtration device for an oil hydrogenation device according to claim 3, wherein the liquid outlet of the gas-liquid separation tank is connected with a dirty oil tank or a storage tank.
7. The cold low-pressure split reverse-flushing filtering apparatus for an oil hydrogenation apparatus according to claim 3, wherein a pressure regulating valve is provided between the cold low-pressure separator and the cold low-pressure split buffer tank.
8. The cold low-split reverse-flushing filtering device for an oil hydrogenation device according to claim 3, wherein a safety valve is arranged at the top of the cold low-split buffer tank.
9. The cold low-pressure gas-separation reverse-blowing filtering device for the oil hydrogenation device according to claim 3, wherein a liquid level gauge is arranged at the bottom of the gas-liquid separation tank.
10. The cold low-split reverse-blowing filtering apparatus for an oil hydrogenation apparatus according to claim 9, wherein the extending direction of the inlet of the gas-liquid separation tank is parallel to the tangential direction of the gas-liquid separation tank, and an annular baffle is provided inside the gas-liquid separation tank.
CN202310118591.1A 2023-02-13 2023-02-13 Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device Pending CN116120962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310118591.1A CN116120962A (en) 2023-02-13 2023-02-13 Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310118591.1A CN116120962A (en) 2023-02-13 2023-02-13 Cold low-pressure gas-separation back-flushing filtering method and device for oil hydrogenation device

Publications (1)

Publication Number Publication Date
CN116120962A true CN116120962A (en) 2023-05-16

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