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Preparation method of irradiation-resistant glass fiber air filter paper

A technology of glass fiber and air filter paper, applied in the field of nuclear power, can solve the problems of poor radiation resistance and achieve the effects of increasing radiation resistance, wide application range, and enhancing hydrophobicity

Active Publication Date: 2016-08-31
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects such as poor radiation resistance of air filter paper in the prior art, the present invention provides a preparation method of radiation-resistant glass fiber air filter paper, and the filtration efficiency of the obtained glass fiber air filter paper belongs to high-efficiency filter paper (H13-H14 ), the tolerable dose rate does not exceed 2.5×10 4 Gy / h, the total dose is not less than 6×10 5 -6.5×10 5 Gy gamma irradiation

Method used

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  • Preparation method of irradiation-resistant glass fiber air filter paper
  • Preparation method of irradiation-resistant glass fiber air filter paper
  • Preparation method of irradiation-resistant glass fiber air filter paper

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Embodiment 1

[0026] Radiation-resistant glass fiber air filter paper uses two kinds of glass microfiber cotton as the main raw material, 0.7d (fineness) × 6mm (length) polyester, aramid fiber, 7μm (diameter) × 9mm (length) non-alkali glass fiber Chopped shreds, adding water and hydrochloric acid (mass concentration is 10%), stirred by a high-frequency deflagger to make a pulp suspension with a concentration of 0.9wt% and a pH value of 2.5, and diluted to a concentration of less than 0.2 after passing through the slag removal system The pulp suspension of wt% is sent to the wire head box, forms wet paper sheet by Fourdrinier machine, sprays S560 acrylic binder (produced by BASF) and TG-5521 fluorine water-repellent agent (large size) evenly on the wet paper sheet Gold company), dried at 160°C for 30 minutes to form radiation-resistant glass fiber air filter paper.

[0027] The above two glass microfiber wools are composed of the following components by mass: SiO 2 : 59%, Al 2 o 3 : 13%, ...

Embodiment 2

[0036] Radiation-resistant glass fiber air filter paper uses two kinds of glass microfiber cotton as the main raw materials, 2d × 9mm polyester fiber, 5 μm × 6mm alkali-free glass fiber chopped shreds, water and sulfuric acid (mass concentration 15%), after high frequency The deflaking machine stirs evenly to make a pulp suspension with a concentration of 1.0wt% and a pH value of 2. After passing through the slag removal system, it is diluted to a pulp suspension with a concentration of less than 0.2wt%, and sent to the head box, and formed by a fourdrinier machine. On the paper sheet, apply 26084 acrylic adhesive (produced by Lubrizol) and IE-6683 silicon-based water repellent (produced by Dow Corning) evenly on the wet paper, and dry at 200°C for 40min to form radiation-resistant Fiberglass air filter paper.

[0037] The above two glass microfiber wools are composed of the following components by mass: SiO2 : 61%, Al 2 o 3 : 11%, CaO: 6%, MgO: 2%, BaO: 3%, ZnO: 2%, K 2 O:...

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Abstract

The invention discloses a preparation method of irradiation-resistant glass fiber air filter paper. The air filter paper is prepared from a uniform mixture of glass microfiber cotton, organic fibers and alkaline-free glass fiber short-cut filaments through a wet process. The mass ratio of the glass microfiber cotton, the organic fibers to the alkaline-free glass fiber short-cut filaments is 15-20:1-2:3-6. In the irradiation-resistant glass fiber air filter paper, the contents of K<+>, Na<+> and B<3+> are reduced, so that the irradiation resistance of the glass fiber air filter paper is improved and the glass fiber air filter paper has tolerance against [gamma] ray irradiation being not more than 2.5*10<4> Gy / h in dose rate and being not less than (6-6.5)*10<5> Gy in total dose. By means of addition of a silicon-series or a fluoro-series water repellent, the glass fiber air filter paper is significantly improved in hydrophobicity, irradiation resistance, tensile strength and the like, improves adaptability of nuclear-grade HEPA filter under a moisture environment and has a wider application range.

Description

technical field [0001] The invention relates to a preparation method of radiation-resistant glass fiber air filter paper, which belongs to the field of nuclear power. Background technique [0002] With the increasingly tense international energy supply situation, in order to meet the rapid growth of electric power and the needs of environmental protection, nuclear power, as a clean and efficient energy source, has become the world's three major power supply pillars together with thermal power and hydropower. According to the "Nuclear Power Medium and Long-term Development Plan (2011-2020)", by 2020, China will build a number of nuclear power plants. It accounts for more than 6% of the country's power generation. The nuclear air purification system is one of the auxiliary systems of nuclear power plants that provide a safe environment for nuclear facility staff and equipment under normal and accident conditions. As an important part of the air purification unit, the functio...

Claims

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Application Information

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IPC IPC(8): D21H15/12D21H13/40D21H13/10D21H21/16D21H21/18D21H21/14
CPCD21H13/10D21H13/40D21H15/12D21H21/14D21H21/16D21H21/18
Inventor 王莹胡晓侠代丰戴旭鹏严洁陈晓燕范凌云吴涛
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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