What is an eco-friendly foam fire extinguishing agent?

original title: What is an eco-friendly foam fire extinguishing agent?orthogonal experiments on the surface tension and foam properties of various green surfactants, from which alkyl glucosamide and S surfactants were screened, the foam properties of alkyl glucosamide and the surface tension of S surfactants were studied, and the content of the two active surfactants was determined by considering the orthogonal test of interaction. Contains glucosamine 2. 5%, S surfactant 2% foam fire extinguishing agent fire extinguishing efficiency to meet the requirements of the national standard.fluorocarbon surfactant is widely used in water-formed membrane foam extinguishing agent because of its high surfactivity, and is the main component of foam extinguishing agent. However, due to its high chemical stability and high thermal stability, long-term difficult to degrade, will cause pollution to the environment. Therefore, there is an urgent need to develop biodegradable and bio-compatible green surfactants instead of fluorocarbon surfactants.Jin Ruiheng in the commercially available surfactants to find both high biodegradability and cheap surfactants, in place of fluorocarbon surfactants to develop environmentally friendly foam fire extinguishing agents. The key to technology is to find a surfactant to reduce the surface tension of the system, so that foam extinguishing agent can spread quickly on the oil surface.the choice of 1 surfactantthe development of foam fire extinguishing agent surface active agent should meet the following conditions:(1) commercially available, chemical plant massproduction ; Initial selection of 10 surfactants: soybean phospholipids, S surfactants, alkyl glycoside, alkyl glutamine, fatty acid methyl sulfonate, sodium laurel glycenine, sodium ceylprosyl inbase, potassium cononine, coconut glynine base saline beetbase, decalkyl methyl beetroot.2 surfactant screening experiments the above 10 surfactants for 10 factors 2 level orthotic experiments, in accordance with the orthotic table. The experimental indicators are surface tension, interface tension, foaming multiplier and 25% solution time of different formulations. The experiment was carried out in accordance with the experimental method specified in GB15308-2006 Foam Fire Extinguisher.alkyl glucosamine is very significantly beneficial to prolong the solution time, significantly conducive to increasing the foaming multiplier, very significantly conducive to reducing the surface tension of the system. S surfactants are very significant in reducing the surface tension of the system. Soybean phospholipids are not suitable for the development of foam extinguishing agents. Therefore, the selection of alkyl glucosamine and S surfactants as surfactants. Further experiments were conducted on the foaming performance of alkyl glucolyamide and the performance of S surfactants to reduce surface tension to determine the content of the two surfactants in the formulation of fire extinguishing agents.The determination of the content of the3 surfactants3. 1 Alkyl glucosamide foam performance experimentin S surfactant mass score of 1%, the experimental different content of alkyl glucoseamide on the system foam multiple and the time of the extraction, the experimental method is the same. The experimental data are shown in Figure 1.can be seen from Figure 1, when the glucosamine content is less than 1%, the foaming and steady foaming performance of the system is very poor. When the quality score of glucoseamide is greater than 1% less than 2%, the foaming and steady foaming ability of the system is obviously improved. After the content of glucosamide is greater than 2%, the foaming and stable foaming properties of the system are very good. Therefore, the mass score of glucosamine should be more than 2%.Glucoseamide (AGA) type surfactant is a new generation of world-class green mild surfactant, in addition to the basic properties of traditional surfactants, but also has a high decontamination, foam rich and delicate and stable, rapid and thorough biodegradation, excellent compounding efficiency and other superior properties, can meet the requirements of environmental protection.3. Effect of 2S surfactant content on surface tension When the mass score of glucosamine is 3%, the effect of experimental S surfactant content on the surface tension of the system is the same as before. the surface tension of the system decreases with the increase of the mass fraction of S surfactants. According to the diffusion coefficient calculation formula, the surface tension of the experimental foam solution is less than 22mN/m to guarantee a positive diffusion coefficient. Therefore, the quality score of S surfactant should be greater than 1. 8%。 3. 3 The interaction between glucanamide and S surfactants the above experiments are single-factor multi-level experiments, without considering the interaction of the two factors. If the interaction between glucanamide and S surfactants is to be considered, an orthogonal experiment should be carried out. experimental indicators are the liquid analysis time, foaming multiple, surface tension, interface tension, the experimental method is the same. the importantness of each indicator and the order of influence of various factors on each indicator, the quality score of glucosamide was 2. 5%, S surfactant mass fraction is 2%. the content of the 4 thickeners is determined the role of thickeners is mainly to improve the stability of the foam. However, because thickeners can improve the viscosity of the solution, it can cause poor fluidity of the foam. Jin Ruiheng experimented with the effects of cation guar gum, cheese and yellow raw gum on foam stability and foam fluidity. the stable foaming ability of the yellow raw gum is better than that of the cation guar gum and cheese. Jin Ruiheng chose yellow original glue as a thickener, taking into account the fluidity of foam fire extinguishing agent, the mass score of yellow plain glue was 1% to 0. 2%。 5 fire extinguishing effectiveness experiment the use of glutamine 2. 5%, S surfactant 2%, huangyuan gum 0. 1% (quality score), the rest is water, the preparation of foam extinguishing agent, in accordance with GB15308-2006 requirements for experiments. Fire extinguishing time 2. 5min, up to fire extinguishing performance level I level; Meet the fire extinguishing performance requirements of low-times foam liquid for non-water-soluble liquid fuel. 6 Conclusions through experiments, the application of alkyl glucoseamide and S surfactants successfully prepared foam extinguishing agent, because glucosamide and S surfactants are green environmental protection surfactants, so Zhejiang Jinruiheng production of foam fire extinguishing agent is environmentally friendly foam fire extinguishing agent.
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