An aqueous fire-fighting foam concentrate includes a sugar component including a monosaccharide sugar, a sugar alcohol, or a combination thereof; a polysaccharide thickener; a surfactant component selected from an anionic surfactant and a zwitterionic surfactant, a water-miscible organic solvent; and at least about 30 wt. % water.

A container is for storing at least one mobile device being recharged. The container has a self-closing door for closing the container, a sensor for detecting a fire inside the container, and an actuator for retaining the door in an open position. The actuator is adaptable to release the door when a fire is detected by the sensor. A mobile device may thus be safely recharged while its user is unaware or asleep.

The present invention discloses a foam material for fire prevention and extinguishing and a preparation method and a use thereof. The foam material for fire prevention and extinguishing comprises the following raw materials in parts by weight: 2-4 parts of foaming agent, 2.5-3.5 parts of foam stabilizer, 10-16 parts of expandable graphite, and 100 parts of water. The foam material for fire prevention and extinguishing has a foaming multiple up to 15-30 times, a viscosity of only 700 mPa.Math.s at a flow state, and the foam could be stable for more than 12 h. After being transported to an ignition point of the goaf via the mine grouting pipeline, the foam material for fire prevention and extinguishing can spread and pile in a large area in the goaf, and thus cover and plug the float coal at low and high places, with a piling height above 1.5 m.

Disclosed is a firefighting composition of the surfactants below and water. The values of m, n, x, and y are independently selected positive integers. R is an organic group. R′ is a siloxane group. ##STR00001##

A foam production method includes mixing liquid nitrogen with a foaming material to produce foam. A gas is produced in situ from liquid nitrogen. As the ratio of the volume of the gas produced by gasification of liquid nitrogen to the volume of the liquid nitrogen is relatively high, when a large gas supply flow is needed to generate a large foam flow, a liquid nitrogen storage device of a small volume can be used instead of bulky air supply devices such as high-pressure gas cylinders, air compressors, air compressor sets and the like, reducing the volume of the air supply device. In addition, the liquid nitrogen used in foaming will release nitrogen gas after the foam blast, such that the nitrogen is also able to inhibit combustion on the surface of burning materials, accelerating the extinguishing of the fire.

Disclosed is a method of fire suppression, comprising: detecting with a sensor a fire stimulus in an environment surrounding the sensor; initiating a first discharge into the surrounding environment, wherein the first discharge comprises an inert gas, carbon dioxide, or any combination(s) thereof; and subsequent to initiating of the first discharge, initiating a second discharge into the surrounding environment, wherein the second discharge comprises a halocarbon.

A dispensing unit that consists of two or more dispensing solutions, at least one being a fluorine-free foam solution, and at least one hydrogel-based solution, and which involves the dispensing of each solution through one or more compressed air foam system (CAFS), where the CAFS may use compressed air, nitrogen, or other inert gas. The individual solutions may be mixed prior to the CAFS, or one or more solutions mixed after the CAFS, or they may be mixed in separate CAFS chambers. The resulting foam may be dispensed through a single line or through multiple lines, applied simultaneously and/or at different times, and may be controlled manually and/or through automatic controls, or through a combination of the above.

Systems and methods for fire suppression systems are disclosed. The methods may include operating the fire suppression system in a first configuration. The methods may further include shifting the fire suppression system from the first configuration to a second configuration in which pumping of foam concentrate to the upstream side of the water pump is stopped and in which foam concentrate is pumped to a downstream side of the water pump. The fire suppression system may be operated in the second configuration whereby a portion of the water pumped from the water pump is combined with foam concentrate to supply a first one of the plurality of manifolds, and another portion of the water pumped from the water pump is provided without foam concentrate to supply a second one of the plurality of manifolds.

An electric outlet fire detection and prevention system may comprise a temperature sensor and an electromagnetic interference (EMI) sensor. A processor within the system may monitor the measurements of the temperature and EMI sensors to determine that a fire has developed in an electric outlet box. The processor may then actuate a triggering mechanism in a cartridge containing fire extinguishing material such that the fire extinguishing material is dispersed in the outlet box. The fire extinguishing material may extinguish a developing fire and prevent the fire from spreading further. The processor may also be coupled with a server, which is configured to analyze measurements of the temperature and the EMI sensors and generate a building profile. When the server determines that any measurements deviate from the building profile, the server may instruct the processor to actuate the triggering mechanism and/or notify an electronic device associated with the building.

Disclosed is a surfactant mixture including: (i) 50%-99% of C1 which includes, per 100% of its weight: (a) 65%-90% of alkyl glutamate with C7-C17, and (b) 10%-35% of formula R1-C(═O)—OH; and (ii) 1%-50% of C2 which includes, per 100% of its weight: (c) 14-80% of C3, represented by R3-O-(G3)p-H where R3 represents C12-C16, G3 represents the residue of a reducing sugar, and 1.05≤p≤5, (d) 0%-3% of an alcohol R3-OH, (e) 20%-80% of C4, which is represented by R4-O-(G4)q-H where R4 represents C4-C7, G4 represents the residue of a reducing sugar and 1.05≤q≤5, and (f) 0%-3% of an alcohol R4-OH. Also disclosed are a fire-fighting foam liquid and a method for extinguishing a fire.