Composite red mud coiled material used for biogas project and preparation method thereof

Abstract

The invention discloses a composite red mud coiled material which has high lamination joint fastness and good physical and mechanical properties and is used for biogas project and a preparation method thereof. The composite red mud plastic coiled material consists of two layers of red mud modified plastic embryonic membranes and a layer of high-strength polyester fiberglass mesh composited between the two layers of red mud modified plastic embryonic membranes, wherein the red mud modified plastic embryonic membrane is prepared by raw materials with the following parts by weight: 100 parts of PVC resin, 35-50 parts of DOP plasticizer, 5-10 parts of DOP low-temperature plasticizer, 5-15 parts of other modified additives, 10-15 parts of red mud modified additive with the fineness being more than 350 meshes, 0.3-0.5 part of photooxidation stabilizing agent and 2.5-4 parts of environment-protection composite heat stabilizer. The composite red mud coiled material used for biogas project hasthe advantages of environment-friendly formula, ageing resistant products, corrosion resistance, flame retardance and more than ten years of service life.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a red mud composite coil for biogas engineering and a preparation method thereof. Background technique [0002] At present, a large number of rural areas have begun to promote the use of biogas digesters. The traditional biogas digester structure is generally a brick-concrete structure or a fiberglass-steel biogas digester structure. At present, large and medium-sized biogas projects at home and abroad generally use low-pressure wet gas storage tanks, and some developed countries have used low-pressure dry gas storage tanks or low-pressure flexible gas storage bags to store biogas. [0003] Among them, the low-pressure wet-type gas storage tank has simple structure, reliable sealing, low technical requirements, and no special gas supply device. However, heat preservation measures should be taken for the water tank in severe cold winter. Sinks, bell jars, etc. are in contact with...

AI Technical Summary

Problems solved by technology

In the actual use of the original ordinary PVC calendered coil in the biogas project, the use of heavy metal heat stabilizers caused soil pollution, which did not meet environmental protection requirements; the lamination fastness was insufficient and delaminated due to internal air pressure expansion during welding or use; sealing Poor performance causes air leakage, unable to withstand the internal pressure of biogas; weather resistance cannot meet the outdoor service life and some physical and mechanical properties cannot meet the use requirements

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