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Preparation method of separation-purification film for deicing waste liquid of airplane

A technology for waste liquid separation and crystal seeding, which is applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of high separation energy consumption, and achieve the effect of simple treatment process and low cost.

Inactive Publication Date: 2017-07-28
CIVIL AVIATION UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, rectification is the recovery technology adopted by most foreign airports. However, rectification consumes a lot of energy for the separation of ethylene glycol and water molecules. It has been reported in the literature that the separation of ethylene glycol aqueous solution in the chemical industry ranks first in the energy consumption of rectification operations. Eighth, the development of new high-efficiency separation methods is the key to the development of deicing / anti-icing fluid recovery systems

Method used

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  • Preparation method of separation-purification film for deicing waste liquid of airplane
  • Preparation method of separation-purification film for deicing waste liquid of airplane
  • Preparation method of separation-purification film for deicing waste liquid of airplane

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Embodiment 1

[0025] (1) Use 1200# sandpaper to smooth the surface of the ceramic tube. After polishing is completed, wash with deionized water, 1mol / L hydrochloric acid, 1mol / L sodium hydroxide solution, and wash with the distilled water pH=7 after washing as the standard. After washing, it was dried in an oven at 50°C for 24 hours. After drying, a line was drawn at 1 cm from both ends of the support, leaving a 2 cm long alumina tube in the middle to be coated with crystals.

[0026] (2) Take 4.736ml of deionized water and add it to 1.021g of aluminum isopropoxide, place it on an electromagnetic stirrer and stir until the solution is uniform, add 0.040g of NaOH, continue to stir for 5-10 minutes until the mixture is uniform, and add 13.089g of tetramethylhydrogen dropwise Bring ammonium oxide to solution, stir well and add 1.280ml 30% silica sol dropwise. After pre-crystallization for 2.5 hours, it was transferred to the reactor and placed in an oven at 80°C for crystallization for 8 hours. ...

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Abstract

The invention belongs to the technical fields of wastewater treatment and alcohol-water separation and particularly relates to a preparation method of a separation-purification film for deicing waste liquid of an airplane. The preparation method comprises the following four steps: preprocessing a support body; preparing crystal seeds; depositing the crystal seeds; and synthesizing a zeolite film. According to the preparation method, a layer of dense zeolite film is generated on the surface of a ceramic matrix and is capable of separating the deicing waste liquid. The preparation method is simple in operation, a prepared zeolite coating layer is compact and environment-friendly and has a good binding force, so that the popularization of the preparation method has good social, environmental and economic benefits.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment and alcohol-water separation, and specifically relates to a method for growing a dense zeolite coating on the surface of a ceramic tube, so that the ceramic tube has the function of separating and purifying deicing waste liquid, and can be used as a core membrane module in airports Separation and purification of aircraft deicing waste liquid. Background technique [0002] Aircraft de-icing / anti-icing fluids are mainly used to remove ice, snow, and frost on the surface of aircraft in cold climates and to prevent the deposition of ice, snow and frost, so as to ensure that the aircraft can safely take off, land and fly in winter. At present, the commonly used aircraft deicing / anti-icing liquid is a mixture of ethylene glycol and / or propylene glycol as the main components. These glycol mixtures can reduce the freezing point by tens of degrees Celsius, which can dissolve snow and prevent icing....

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00C02F1/44C02F101/34
CPCB01D71/025B01D67/0051C02F1/448C02F2101/34
Inventor 王灏任宇曦景超杰
Owner CIVIL AVIATION UNIV OF CHINA
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