Glass fiber water filter paper for nuclear power plant and preparation method thereof

Abstract

The invention discloses glass fiber water filter paper for a nuclear power station and a preparation method thereof. The glass fiber water filter paper is prepared from two or more types of borosilicate glass micro-fiber cotton with the beating degree of 39 to 60 degrees SR and high-performance organic fibers with the diameter of 0.3 to 2den and the length of 5 to 10mm; the mass percent of the high-performance organic fibers is 3 to 15 percent. A flocculating agent, a film-forming agent and a binding agent are sequentially applied to a wet paper page; after the wet paper page is dried, a non-woven fabric is stuck on one surface or double surfaces to form the glass fiber water filter paper. The glass fiber water filter paper disclosed by the invention has the filtering precision which is less than or equal to 0.45mum and an SiO2 separation amount which is less than 0.8PPM and meets water quality requirements of a return circuit of the nuclear power station.

Description

technical field [0001] The invention relates to the field of water filtration in nuclear power plants, in particular to an anti-SiO 2 Precipitated high-precision glass fiber water filter paper and a preparation method thereof. Background technique [0002] The water circuit system of the nuclear power plant needs to use filters of different sizes and precisions to keep the water pure, prevent corrosion products and suspended solid particles in the water from causing harm to the circuit system, and ensure the normal operation of the nuclear power plant. In terms of filtration accuracy, the filter element used in the filter is only 5 μm, 25 μm, and 100 μm at first, but with the development of international nuclear power technology, the requirements for the water quality of the primary circuit continue to increase, and high-precision filter elements with a filtration accuracy of 0.45 μm and 1 μm are required. In order to improve the service life and filtration accuracy of wate...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the filtration accuracy of the existing nuclear power plant water filter cannot meet the requirements, the glass fiber filter element is used in the process of SiO 2 The technical problem of precipitation, the present invention provides a kind of glass fiber water filter paper for nuclear power plant and its preparation method, the filtration precision of glass fiber water filter paper is ≤0.45μm, SiO 2 The amount of precipitation is less than 0.8PPM, fully meeting the water quality requirements of the primary circuit of nuclear power plants

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