Organic/inorganic composite microcapsule fire-extinguishing agent and preparation method thereof

Abstract

The invention discloses an organic / inorganic composite microcapsule fire-extinguishing agent, and belongs to the field of fire-fighting materials. The organic / inorganic composite microcapsule fire-extinguishing agent comprises the following components in percentage by weight: 15 to 25 percent of monoammonium phosphate, 60 to 75 percent of ammonium sulfate, 0.5 to 1.5 percent of urea, 1 to 2.5 percent of potassium chloride, 4 to 9 percent of sodium silicate, 0.1 to 0.5 percent of fatty acid zinc, 0.2 to 0.5 percent of fatty acid magnesium and 1.5 to 2 percent of methyl silicane, wherein the sum of the components is 100 percent. According to the organic / inorganic composite microcapsule fire-extinguishing agent, grain diameters of the components are controlled, and the components are microencapsulated by a special process to prepare the fire-extinguishing agent, so that the fire-extinguishing agent cannot deteriorate after being used for 7 years and is inert at the temperature of less than 60 DEG C, and the standard of a product is applicable to international standard organization (ISO), European norm (EN) 615 and national standard (GB) 4066.2-2004; and the fire-extinguishing agent contains nutrient elements such as N, P, K and B which are required by plants and is absolutely harmless to human and animals, and microbes can be degraded within three days, so the organic / inorganic composite microcapsule fire-extinguishing agent is the most ideal 'reen' fire-extinguishing agent which is environment-friendly and low in cost and does not have carbon emission, is efficient in fire-extinguishing performance, wide in fire-extinguishing range and low in production cost and has high economic and social benefits.

Description

technical field [0001] The invention relates to a fire extinguishing agent, in particular to a fine-particle composite fire extinguishing agent containing organic components and inorganic components. Background technique [0002] At present, in the field of fire extinguishing technology, in order to reduce the damage of halon substances to the ozone layer, ammonium phosphate dry powder fire extinguishing agent has become a substitute for halon substances. [0003] For current ammonium phosphate dry powder fire extinguishing agent, generally there are following disadvantages: [0004] First, in order to ensure the fire extinguishing effect, it is generally required that the content of monoammonium phosphate (also known as ammonium phosphate) should account for 50% to 90% of the mass of the fire extinguishing agent. Ammonium has made a regulation of ≥75%. In the Chinese patent application with publication number CN1196269A, the content of ammonium phosphate is 50-78%. The con...

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Problems solved by technology

[0005] The phosphorus element in ammonium phosphate is a kind of natural resource protection. At the same time, the production of ammonium phosphate generally adopts thermal method or wet method. The production method is a method of high power consumption, which consumes a lot of energy, especially power consumption.

Secondly, because the ammonium phosphate content in the existing fire extinguishing agent is too high, the ammonium phosphate decomposes rapidly at high temperature and absorbs a large amount of heat energy, so that the high-temperature flame energy is transferred to the phosphate dry powder fire extinguishing agent to produce energy phase exchange and collision phenomenon (expansion boiling). , so at the beginning of fire extinguishing, there is a phenomenon of anti-fire fighting. The content of ammonium phosphate in the fire extinguishing agent is high (the energy absorbed is high, and the probability of flame counterattack is high, which poses a certain threat to firefighters.

[0006] Second, in terms of particle size distribution of fire extinguishing agent materials, it is required that materials less than 40 μm in the entire fire extinguishing agent should account for more than 50% of the weight of the entire fire extinguishing agent, while other particle sizes of materials in the fire extinguishing agent, such as 63 μm, 125 μm, and 250 μm, do not Any technical regulations, on the one hand, the fire extinguishing effect is limited: although the smaller the fire extinguishing agent particles, the larger the surface area, the wider the coverage, and the stronger the ability to capture the burning flame, but it is more difficult for the particles with small particle size to enter the flame zone, that is, to enter The effective components in the flame area are reduced, which requires a certain amount of large particle size particles to have a high "trip" effect; on the other hand, due to the small particle size, the physical properties of dry powder fire extinguishing agents such as moisture absorption resistance, fluidity, and Caking performance is poor

[0007] The third is that there are limitations on the types of fire extinguishing

Present general ammonium phosphate fire extinguishing agent can only be to A class (solid material fire), B class (liquid or meltable solid material fire), C class (gas fire), such as the Chinese patent application that publication number is CN1698915; Although The Chinese patent application whose publication number is CN101239228A can also be used for extinguishing Class E, that is, live fires, but not only Classes A, B, C, and E in fires, but also Class D, that is, metal burning fires, has no good fire extinguishing effect , the existing ABC dry powder fire extinguishing agent cannot form a layer of inert flame retardant covering layer on the metal surface

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