Chemical fire retardant for controlling spontaneous combustion of lignite of power plant

Abstract

The invention relates to a chemical fire retardant for controlling spontaneous combustion of lignite of a power plant. At present, no chemical fire retardant for controlling spontaneous combustion of lignite of the power plant, which is especially suitable for spontaneous combustion of lignite and good in fire retardance effect, and accords with the requirement of environment friendliness of the power plant, exists. The chemical fire retardant is characterized by comprising 0.5-1 percent by weight of component A, 0.1-0.5 percent by weight of component B, 0.1-0.5 percent by weight of component C and the balance of water, wherein the component A is polymer absorbent resin, the component B is a surfactant, the component C is a film forming agent, and the pH value of the chemical fire retardant is 5.0-7.0. The chemical fire retardant is especially suitable for spontaneous combustion of lignite, and good in fire retardance effect, and accords with the requirement of environment friendliness of the power plant.

Description

technical field [0001] The invention relates to a chemical flame retardant, in particular to a chemical flame retardant for preventing and controlling the spontaneous combustion of lignite in power plants, which can play a role of flame retardancy during the accumulation and transportation of lignite, and is specially used for flame retarding lignite. Background technique [0002] During the accumulation and transportation of lignite, the ash content of coal will increase due to oxidation, the fixed carbon and calorific value will decrease, and the quality of coal will be reduced. Spontaneous combustion of coal will also cause a large amount of coal to be burned in vain. For example, the lignite burned by Fujian Power Plant is often used for more than 15 days at the coal yard. Due to the long time of coal storage, spontaneous combustion often occurs, and sometimes spontaneous combustion occurs in several places at the same time. The smoldering lignite can cause combustion an...

AI Technical Summary

Problems solved by technology

[0007] Silica gel-based inhibitors based on water glass use a large amount of coagulant. When extinguishing a large-scale fire, the material transportation is extremely inconvenient, which hinders the fire-fighting process. The added strong oxidant destroys the coal body. The active structures and groups in the coal reduce the quality of coal

The organic nitrogen-based flame retardants and organic halogen-based flame retardants currently used will release NO after burning at high temperature X , diphenylfuran and other substances harmful to the atmosphere and human body; most of the organophosphorus flame retardants are liquid, with high volatility and poor heat resistance, and they tend to lose their flame retardant effect in the later stage

[0008] To sum up, there is currently no chemical flame retardant that is specially used to flame-retardant lignite, has a good flame-retardant effect, and meets the environmental protection requirements of power plants to prevent and control the spontaneous combustion of lignite in power plants

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