The application of FRP gratings in the wastewater treatment engineering

Date:2010-11-17

With the rapid development of modern industry, environmental issues are overlooked, is one of the important means of environmental protection, sewage treatment and FRP pultrusion profiles as a lightweight, high strength, corrosion resistance of new materials, is the ideal material in wastewater treatment engineering. Characteristics: in the sewage treatment system, water tank around the need to use a lot of barriers and as but grille. In traditional engineering, guardrail and grating is made of metal materials such as steel pipe welding, surface coating antirust paint again. And there are many in the treatment of wastewater with strong corrosion resistance, the spatter water droplets or of moisture volatilizes has strong corrosion of the metal, over time, the rusting of the metal, and even loss, there are many hidden dangers. FRP pultrusion profiles compared with metal material, it has the advantage of light quality; High strength; Excellent corrosion resistance, can fundamentally solve the metal fence and grille easy corrosion, difficult maintenance, and service life greatly extended, the comprehensive cost control; Beautiful shape colour diversity, and can keep bright-coloured colour and lustre in the corrosive environment, which can beautify the environment. Second, the structure design of 1, the structure of the glass fiber reinforced plastic fence: a: using st50-4 square tube column and the upper rail, rt - 30 x 20 pipe for the rail, skirting board corrugated plate, between rail and pillar on glass fiber reinforced plastic piece with adhesive and bolt couplet body, circular hole in a column corresponding middle rungs, wear the pipe in the hole, and glass fiber reinforced plastic bolt in the circular tube vertically inserted in the column; Corrugated plate with stainless steel core pulling rivets or plastic rivet column connection structure 2: the st - 60-4.7 square tube column, st50 rail - 4 square tube, corrugated plate for skirting board, st - 50-4 square tube wear among st60 4.7 square tube, in the match with glass fiber reinforced plastic bolt. Other reference to structure a connection. Post installation can adopt three forms: 1, through the expansion bolt is fixed on the side of the base; 2, set in the corresponding part of the basis of the reserved hole, when installation columns in it, and then filled with cement mortar; 3, on the basis of the corresponding parts of embedded iron, welding the vertical plate, column and vertical plate by screws. Structure 2: the st - 60-4.7 square tube column, rail st50-4 square tube, corrugated plate for skirting board, st - 50-4 square tube wear among st60 4.7 square tube, in the match with glass fiber reinforced plastic bolt. Other reference to structure a connection. Post installation can adopt three forms: 1, through the expansion bolt is fixed on the side of the base; 2, set in the corresponding part of the basis of the reserved hole, when installation columns in it, and then filled with cement mortar; 3, on the basis of the corresponding parts of embedded iron, welding the vertical plate, column and vertical plate by screws. Three, FRP FRP gratings with "I" profile for bearing parts, the attachment with the plum blossom shape structure assembled. Bearing a pole height is 2.5 cm, 3.8 cm and 5 cm impassability specifications, could be selected according to the needs of use. Project indicators density/g · cm - 31.8 ~ 1.9 pap strength p 45 oxygen index and uniformly distributed load or impact/MP3 acuity 0.52 KJ/performance m. - 2 p 16 four, raw materials, glass fiber reinforced plastic profile continuous blanket, knitted with glass fiber mat and roving as reinforced materials, unsaturated polyester as the substrate material compounded by the pultrusion. Five, the performance index to 3.8 cm grid as an example, its physical mechanical properties and oxygen index see table 1. FRP pultrusion profiles as a new type of composite material, has excellent comprehensive performance, is the new direction of the development of the material, in sewage treatment and other environmental protection engineering and municipal engineering and its broad application prospects

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