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CN-120771648-B - Oil gas recovery device for oil depot by membrane separation method

CN120771648BCN 120771648 BCN120771648 BCN 120771648BCN-120771648-B

Abstract

The invention relates to the technical field of oil-gas membrane separation, in particular to a membrane separation method oil-gas recovery device for an oil depot, which comprises a gas treatment assembly, a gas pipe assembly and a membrane assembly, wherein the gas pipe assembly comprises an outer sleeve and an inner sleeve, the outer sleeve is arranged in the gas pipe assembly, a plurality of butt joint units are equidistantly arranged on the outer side wall of the outer sleeve, the gas treatment assembly comprises a gas inlet pump, a gas pump, a condensation module and a liquid collecting tank, and the output end of the gas inlet pump is communicated with one end of the outer sleeve. According to the invention, through the arrangement of the air pipe assembly, the air is introduced into the first pipeline through the corresponding butt joint unit, the first pipeline guides the air into the separation membrane, and when the separation membrane works, the separation membrane continuously rotates, so that one position on the separation membrane is prevented from being aligned with the first pipeline for a long time, the influence of concentration gradient of the oil-gas in the separation membrane on the separation membrane is reduced, the workload of each part of the separation membrane is the same, and the membrane separation efficiency and the quality stability are improved.

Inventors

  • ZOU XIAOHUI
  • YI WENKAI
  • WANG LONG
  • SUN PIN
  • Zou Xiangdie

Assignees

  • 江苏法利沃环保科技有限公司

Dates

Publication Date
20260508
Application Date
20250827

Claims (7)

  1. 1. A membrane separation process oil and gas recovery apparatus for an oil depot, comprising: The tracheal assembly (200) comprises an outer sleeve (210) and an inner sleeve (220), wherein the outer sleeve (210) is arranged in the tracheal assembly (200), and a plurality of butt joint units (230) are equidistantly arranged on the outer side wall of the outer sleeve (210); The gas treatment assembly (100) comprises a gas inlet pump (120), a gas pump (130), a condensation module (140) and a liquid collecting tank (150), wherein the output end of the gas pump (120) is communicated with one end of an outer sleeve (210), the input end of the gas pump (130) is fixedly communicated with one end of an inner sleeve (220), the output end of the gas pump (130) is communicated with the condensation module (140), one end of the condensation module (140) is communicated with the liquid collecting tank (150), one side of the gas pump (120) is provided with a heating module (110), the input end of the gas pump (120) is fixedly communicated with an air inlet pipe (111), and the heating module (110) is used for heating the air inlet pipe (111); The membrane assembly (300) is multiple in number, the membrane assembly (300) comprises an inner tile (310), a separation membrane (330) and a shell (320) are detachably arranged on the outer side wall of the inner tile (310), the shell (320) is positioned on the outer side of the separation membrane (330), a first pipeline (350) and a third pipeline (380) are fixedly communicated with the inner side wall of the inner tile (310), a second pipeline (360) is fixedly communicated with the outer side wall of one end of the first pipeline (350), a plurality of branch pipes (361) are fixedly communicated between one end of the second pipeline (360) and the inner side wall of the inner tile (310), and the communication position between one end of each branch pipe (361) and the inner tile (310) is positioned between the separation membrane (330) and the shell (320); a first ring frame (332) is arranged on the annular inner wall of one side of the separation membrane (330), a third pipeline (380) is arranged on the inner wall of the inner tile (310), and the third pipeline (380) is used for driving the separation membrane (330) to rotate through the first ring frame (332); The outer side wall joint of the inner tile (310) is provided with a support ring (340), one end of the support ring (340) is provided with an air inlet hole (341), the other end of the support ring (340) is provided with an air outlet hole (342), the air inlet hole (341) is aligned with a first pipeline (350), the air outlet hole (342) is aligned with a third pipeline (380), the support ring (340) is positioned between a separation membrane (330) and the inner tile (310), and a gap cavity (331) is formed between the separation membrane (330) and the support ring (340); The driving module (370) comprises a second ring frame (371), a fixed pipe (373) and a reduction gearbox (375), the second ring frame (371) is rotationally connected with the inner wall of the inner tile (310), a plurality of magnetic blocks are embedded and installed on the first ring frame (332) and the inner wall of the second ring frame (371) at equal intervals, a conical tooth ring (372) is fixedly connected with the inner wall of the second ring frame (371), a fixing pipe (373) is fixedly sleeved with a third pipeline (380), the top end of the fixed pipe (373) is rotationally connected with a fan blade (374), the inner wall of the fixed pipe (373) is rotationally connected with a transmission shaft (377), the top end of the transmission shaft (377) is rotationally connected with the input end of the reduction gearbox (375), the first pipeline (350) is fixedly installed on the inner tile (310), the output end of the reduction gearbox (375) is fixedly sleeved with a bevel gear (376), and the bevel gear (376) is meshed with the conical tooth ring (372).
  2. 2. The membrane separation oil gas recovery device for an oil depot according to claim 1, wherein the butt joint unit (230) comprises an outer butt joint pipe (231), one end of the outer butt joint pipe (231) is fixedly communicated with a valve pipe two (236), the valve pipe two (236) is fixedly installed with the inner sleeve (220), the outer butt joint pipe (231) is fixedly installed with the outer sleeve (210), thread grooves are formed in the inner wall of the other end of the outer butt joint pipe (231) and the outer side wall of the other end of the pipeline two (360), the other end of the pipeline two (360) is in screwed connection with the other end of the outer butt joint pipe (231), an inner butt joint pipe (232) is installed in the butt joint unit (230), and one end of the inner butt joint pipe (232) is in plug-in connection with one end of the pipeline one (350).
  3. 3. The membrane separation oil and gas recovery device for an oil depot according to claim 1, wherein a sealing part (312) is arranged on one side of the inner tile (310), the sealing part (312) is used for being in joint with the casing (320) before, and an outer clamping ring (311) is detachably arranged on the other side of the inner tile (310).
  4. 4. The membrane separation oil gas recovery device for the oil depot according to claim 2, wherein the inner wall of the inner butt joint pipe (232) is sleeved with a valve pipe I (233) in a sliding manner, one end of the valve pipe I (233) is provided with a valve hole I (234), the other end of the valve pipe I (233) is fixedly connected with a limiting ring (235), and the limiting ring (235) is used for abutting against the pipeline I (350).
  5. 5. The membrane separation oil gas recovery device for the oil depot according to claim 4, wherein a valve hole II (2361) is formed in the outer side wall of the valve pipe II (236), a shaft lever (237) is fixedly connected to one end of the valve pipe I (233), two valve plates (2371) are fixedly installed at one end of the shaft lever (237), and the shaft lever (237) is in sliding connection with the inner butt joint pipe (232).
  6. 6. The membrane separation oil and gas recovery apparatus for an oil depot according to claim 5, wherein one end of the valve tube two (236) penetrates through the inner wall of the inner sleeve (220), and one end of the valve tube two (236) is communicated with the inside of the outer sleeve (210).
  7. 7. The membrane separation oil gas recovery device for the oil depot according to claim 1, wherein an air return pipe (151) is fixedly communicated with the top end of the liquid collection tank (150), and one end of the air return pipe (151) is fixedly communicated with the air inlet pipe (111).

Description

Oil gas recovery device for oil depot by membrane separation method Technical Field The invention relates to the technical field of oil-gas membrane separation, in particular to an oil-gas recovery device for an oil depot by a membrane separation method. Background In the petroleum and petrochemical industry, oil reservoirs (including oil storage tanks, loading and unloading platforms and the like) are one of the main sources of volatile organic compounds, especially light oil and gas volatilization and discharge. The oil gas not only causes serious waste and economic loss of precious energy, but also forms important precursors of PM2.5 and ozone, and forms a great threat to the environment and human health, so that the efficient and reliable oil gas recovery technology has become a key link of mandatory environmental protection requirements and cost reduction and synergy of oil depot operation. In a plurality of oil gas recovery technologies (such as an adsorption method, an absorption method and a condensation method), the membrane separation method has the advantages of simple flow, flexible operation, no secondary pollution, relatively low energy consumption and the like, The existing membrane separator mostly adopts an end air inlet or side air inlet mode, and when a large amount of oil gas enters a membrane shell with limited volume at a high flow rate, severe turbulence and collision can be formed at an inlet. This results in the membrane directly facing the inlet opening being subjected to extremely high gas velocities and pressure differentials, while the membrane at the edge of the housing or remote from the inlet area is in a "starved" condition, with significantly lower gas flow, and this uneven distribution causes premature contamination, clogging or mechanical fatigue of part of the membrane, resulting in reduced membrane life and separation efficiency. Disclosure of Invention The invention aims to provide a membrane separation method oil gas recovery device for an oil depot, which is used for solving the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: A membrane separation process oil and gas recovery apparatus for an oil depot comprising: the tracheal assembly comprises an outer sleeve and an inner sleeve, the outer sleeve is arranged in the tracheal assembly, and a plurality of butt joint units are equidistantly arranged on the outer side wall of the outer sleeve; The gas treatment assembly comprises a gas inlet pump, a gas pump, a condensation module and a liquid collecting tank, wherein the output end of the gas inlet pump is communicated with one end of the outer sleeve, the input end of the gas pump is fixedly communicated with one end of the inner sleeve, the output end of the gas pump is communicated with the condensation module, one end of the condensation module is communicated with the liquid collecting tank, one side of the gas inlet pump is provided with a heating module, the input end of the gas inlet pump is fixedly communicated with a gas inlet pipe, and the heating module is used for heating the gas inlet pipe; The membrane assembly is multiple in number, and comprises an inner tile member, a separation membrane and a shell member are detachably mounted on the outer side wall of the inner tile member, the shell member is located on the outer side of the separation membrane, a first pipeline and a third pipeline are fixedly communicated with the inner side wall of the inner tile member, a second pipeline is fixedly communicated with the outer side wall of one end of the first pipeline, a plurality of branch pipes are fixedly communicated between one end of the second pipeline and the inner side wall of the inner tile member, and one end of each branch pipe and the communicating position of the inner tile member are located between the separation membrane and the shell member. The butt joint unit comprises an outer butt joint pipe, one end of the outer butt joint pipe is fixedly communicated with a valve pipe II, the valve pipe II is fixedly installed between the valve pipe II and the inner sleeve pipe, the outer butt joint pipe is fixedly installed between the outer butt joint pipe and the outer sleeve pipe, threaded grooves are formed in the inner wall of the other end of the outer butt joint pipe and the outer side wall of the other end of the second pipeline, the other end of the second pipeline is used for being in screwed connection with the other end of the outer butt joint pipe, an inner butt joint pipe is installed in the butt joint unit, and one end of the inner butt joint pipe is used for being in plug connection with one end of the first pipeline. The separation membrane is characterized in that a first ring frame is arranged on the annular inner wall of one side of the separation membrane, a third pipeline is arranged on the inner wall of the inner tile member, and the t