Performance Analysis And Process Optimization Of Fire Retardant Module

With the development of society and economy,coal,oil and natural gas,as the traditional energy,are facing the exhaustion of resources.In addition,CO2 produced by the combustion of coal and oil has formed a serious greenhouse effect,and the environmental problems brought by the greenhouse effect have attracted more and more people’s attention and concern.Nuclear power belongs to clean energy and has little impact on the environment.It can be predicted that nuclear power will become an important research direction for the development of new energy in the future.Safety is a major challenge for the development of nuclear power.According to statistics,the frequency of fire in nuclear power plant is much higher than the probability of nuclear accident.As an external event of nuclear power plant,fire has been paid more and more attention by people.Widely distributed cable Bridges in power plants will lead to the rapid spread of fire,therefore,fire prevention and blocking is an indispensable protection when cable Bridges are erected.Especially for cables with large loads,in order to meet the requirements of heat exchange,the bridge needs to use fire retardant cladding with ventilation module to ensure the normal temperature in the bridge.When a fire occurs,the ventilation module can be closed quickly to prevent heat exchange.In this paper,through the optimization of flame retardant to improve the performance of the flame retardant module,the first use of flame retardant for aluminum hydroxide,phosphorus and nitrogen flame retardant module and existing instant sodium silicate flame retardant module for comparison analysis,through the analysis of the mechanical properties of the module,combustion performance,mechanical properties,expansion properties,etc.The aluminum hydroxide was determined as the optimal flame retardant,and then the influence of different flame retardant components on the module performance was analyzed,and the comprehensive performance of flame retardant was determined to be the best when the content of flame retardant was 49.4.1.Comparison of flame retardantsWhen the number of flame retardant is 49.4,the three modules have good flame retardant effect.UL94 test shows that the flame retardant grade of the modules can reach V-0 level.According to the ultimate oxygen index test,the LOI values of the modules whose flame retardants are alumina hydroxide,phosphorus nitrogen flame retardants and instant sodium silicate are 85.49,60.3 and 61.45,respectively.The modules whose flame retardants are alumina hydroxide have the best flame retardancy effect.2.Determination of flame retardant contentThe optimal content of flame retardant was determined to be 49.4% by testing and analyzing the modules with different fractions of flame retardant.At this time,the mechanical properties of the fire-retardant module are excellent,the tensile strength is 1.36 MPa,and the elongation at break is 76.04%.The Shaw hardness is 78.3.The ignition time of the module is121 s with the minimum heat release rate and the peak heat release rate is 21.17 kW/m~2.The fire risk is minimal,with an FGI of only 0.10 kW/(m~2?s).