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Preparation of hollow fiber ventilated membrane for oil-gas automatic separation

A fiber gas permeable membrane and automatic separation technology, applied in separation methods, semipermeable membrane separation, chemical instruments and methods, etc., can solve the problem of long gas permeation equilibrium time, low dissolved gas permeability, and inability to achieve effective permeation of seven characteristic gases And other issues

Inactive Publication Date: 2008-11-12
CHONGQING UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] At present, a single fluorine membrane or rubber membrane is commonly used in the world to carry out gas penetration for automatic separation of oil and gas in transformer oil. Practical application experience shows that: the H 2 , CO, CH 4 , C 2 h 4 , C 2 h 2 , C 2 h 6 , CO 2 The permeability of the seven dissolved gases is low, and the ratio of the gas concentration in the gas chamber to the dissolved gas concentration in the oil after permeation equilibrium for each gas is lower than 0.3, and the gas permeation equilibrium time is long, ranging from 7 to 15 days, which cannot achieve the above Effective penetration of seven characteristic gases
Chinese Patent No. ZL200610054095.0 discloses "Preparation Method of Polymer Breathable Membrane for Automatic Oil and Gas Separation", compared with single fluorine membrane or rubber membrane, H 2 , CO, CH 4 , C 2 h 4 , C 2 h 2 , C 2 h 6 The permeability of the six dissolved gases was greatly increased, and the gas permeation equilibrium time was shortened to 2-3 days, but CO 2 low penetration rate

Method used

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  • Preparation of hollow fiber ventilated membrane for oil-gas automatic separation
  • Preparation of hollow fiber ventilated membrane for oil-gas automatic separation

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: For the process flow of the preparation method of the polymer gas permeable membrane used for the automatic separation of oil and gas, polytetrafluoroethylene, polyvinylidene fluoride and polyhexafluoropropylene are respectively placed in containers, put into a baking furnace, and press 25 After baking at a heating rate of ℃ / min to 250 ℃, keep it warm for 4 hours; prepare according to the baked polytetrafluoroethylene 70%, polyvinylidene fluoride 15%, polyhexafluoropropylene 15%; stir evenly, put in a container , put it into the baking furnace, preheat to 350°C, keep it warm for 3 hours, then continue to heat to 400°C, keep it warm for 4 hours; extrude the heated mixed raw materials through the hollow fiber spinneret at a speed of 20ml / min , to form primary fibers; after the primary fibers move 50cm, they are cooled and shaped at 50°C, and the outer diameter of the shaped hollow fiber air-permeable membrane is 1.5mm, and the wall thickness is 0.4mm; the hol...

Embodiment 2

[0018] Example 2: For the flow process of the preparation method of the polymer gas permeable membrane used for the automatic separation of oil and gas, polytetrafluoroethylene, polyvinylidene fluoride and polyhexafluoropropylene are respectively placed in containers, put into a baking furnace, and press 20 After baking at a heating rate of ℃ / min to 200 ℃, keep it warm for 5 hours; prepare according to the baked polytetrafluoroethylene 65%, polyvinylidene fluoride 20%, and polyhexafluoropropylene 15%; stir evenly and place in a container , put it into the baking furnace, preheat to 300°C, keep it warm for 4 hours, then continue to heat it to 350°C, keep it warm for 5 hours; extrude the heated mixed raw materials through the hollow fiber spinneret at a speed of 10ml / min , to form primary fibers; after the primary fibers move 30cm, they are cooled and shaped at 40°C, and the outer diameter of the shaped hollow fiber air-permeable membrane is 1.3mm, and the wall thickness is 0.3mm...

Embodiment 3

[0019] Embodiment 3: For the process flow of the preparation method of the polymer gas permeable membrane used for the automatic separation of oil and gas, polytetrafluoroethylene, polyvinylidene fluoride and polyhexafluoropropylene are respectively placed in containers, put into a baking furnace, press 15 After baking at a heating rate of ℃ / min to 150℃, keep it warm for 6 hours; prepare according to the baked polytetrafluoroethylene 60%, polyvinylidene fluoride 25%, and polyhexafluoropropylene 15%; stir evenly and place in a container , put it into the baking furnace, preheat to 200°C, keep it warm for 5 hours, and then continue to heat it to 300°C, keep it warm for 6 hours; extrude the heated mixed raw materials through the hollow fiber spinneret at a speed of 5ml / min , to form primary fibers; after the primary fibers move 10cm, they are cooled and shaped at 20°C, and the outer diameter of the shaped hollow fiber air-permeable membrane is 1.0mm, and the wall thickness is 0.2m...

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PUM

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Abstract

A production method of hollow fiber permeable membrane for oil gas autosegregation relates to a production method of permeable membrane for oil gas autosegregation in transformer oil, effectively improving permeation effect of dissolved gas generated by insulation fault in transformer oil and reducing gas permeation balance time. The technical scheme of the present invention comprises raw material preparation, raw material baking, raw material formulation, heating after pre-heating, extrusion forming, refrigeration shaping, and coiling the shaped hollow fiber permeable membrane on wheels. The present invention has good gas permeation effect and short gas permeation balance time, and is used for gas permeation of dissolved gas in transformer oil so as to implement oil gas autosegregation.

Description

technical field [0001] The invention relates to a preparation method of a breathable membrane used for automatic separation of oil and gas in transformer oil. Background technique [0002] At present, a single fluorine membrane or rubber membrane is commonly used in the world to carry out gas penetration for automatic separation of oil and gas in transformer oil. Practical application experience shows that: the H 2 , CO, CH 4 , C 2 h 4 , C 2 h 2 , C 2 h 6 , CO 2 The permeability of the seven dissolved gases is low, and the ratio of the gas concentration in the gas chamber to the dissolved gas concentration in the oil after permeation equilibrium for each gas is lower than 0.3, and the gas permeation equilibrium time is long, ranging from 7 to 15 days, which cannot achieve the above Effective penetration of seven characteristic gases. Chinese Patent No. ZL200610054095.0 discloses "Preparation Method of Polymer Breathable Membrane for Automatic Oil and Gas Separation"...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/30B01D19/00
Inventor 陈伟根王有元杜林廖瑞金陈明英李剑孙才新唐炬
Owner CHONGQING UNIV
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