CN102240433A

CN102240433A - Method for preparing efficient non-toxic fire-extinguishing agent

Info

Publication number: CN102240433A
Application number: CN2010101747112A
Authority: CN
Inventors: 黄利明; 徐涛
Original assignee: SHANGHAI YOUBEI ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Current assignee: SHANGHAI YOUBEI ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Priority date: 2010-05-13
Filing date: 2010-05-13
Publication date: 2011-11-16

Abstract

The invention relates to a method for preparing an efficient non-toxic fire-extinguishing agent. In three-year practical tests, aiming at the characteristics of various fire-extinguishing agents, understanding, analysis and comparison are performed systematically to find the reason of the defects of the conventional fire-extinguishing agent; and the effects of different chemical ingredients in different periods are arranged detailedly, and when the fire-extinguishing agent is developed, mild, non-toxic and degradable ingredients are added to achieve the effect of efficient fire extinguishing and fulfill the aims of environment friendliness and energy conservation. After the compatibility of various substances in water is considered fully, a formula of the fire-extinguishing agent is screened and determined by test methods such as a freezing method, a centrifugal method, an artificial aging method, a fire-extinguishing method and the like and by adopting an optimization rule. The substances selected in the method can be degraded, and the efficient non-toxic fire-extinguishing agent reaches an actual non-toxic level by the detection of an authoritative institution of Shanghai city. The storage period of the efficient non-toxic fire-extinguishing agent is more than or equal to 5 years.

Description

A kind of preparation method of high effect nontoxic extinguishing chemical

Technical field

The kind of extinguishing chemical is divided into: liquid type extinguishing chemical, dry powder class extinguishing chemical, gas extinguishing agent and mixing class extinguishing chemical.

The liquid type extinguishing chemical is divided into: fire foam, clear water extinguishing chemical, thickening class extinguishing chemical etc.

The problem that foam class extinguishing chemical exists has:

1, extinguishing mechanism is single, only depends on the covering starvation to put out a fire.

2, storage period shorter, be generally 1 to 2 year

3, the residue easy cleaning not after the fire extinguishing can not be degraded, and causes on-the-spot secondary pollution.

4, fire foam often has certain harm to people and poultry.

The present invention has improved the defective that above-mentioned fire foam exists with regard to above problem

The present invention tests through the practice in 3 years, characteristic at all kinds of extinguishing chemicals, we have done understanding, analysis, the contrast of system, find out the reason place of its defective, different chemical composition has been used as detailed arrangement during difference, when this extinguishing chemical of research and development, we adhere to adding gentle, nontoxic, degradable composition is principle, in the hope of both reaching high efficiency fire extinguishing effect, reach the purpose of environmental protection and energy saving simultaneously.

We have added chemical compositions such as urea, ammonium hydrogen phosphate in extinguishing chemical, and when the condition of a fire took place, ambient temperature rose, and these chemical compositions after the dispersion just can absorb heat, decomposite a large amount of inert gases, and on-the-spot temperature and oxygen concentration are minimized; Add chain-breaker, it can block the chemical combustion chain rapidly when the condition of a fire takes place; Add silicate, when the condition of a fire took place, silicate and other substance reaction generated the effect that a kind of special material also can cover the surface of comburant thereby play starvation; The surfactant that adding is refined from plant, can significantly reduce the surface tension of liquid, make extinguishing chemical infiltrate solid interior better, greatly promote the ability of putting out the solid fire, when putting out the flammable liquid fire, can generate the surface that fine and close froth bed covers liquid with other substance reaction; The adding inorganic salts can increase the frost resistance of extinguishing chemical.

After taking into full account the blending of various materials in water, we adopt preferred rule screening to determine the prescription of extinguishing chemical by using test methods such as freezing, centrifugal process, artificial ageing method and fire fighting method.

Material selected among the present invention all can be degraded, and detects this extinguishing chemical through Shanghai City authoritative institution and reaches actual nontoxic level.Be no less than 5 years the storage period of this extinguishing chemical.

Prescription:

Urea 5～15

Ammonium hydrogen phosphate 8～18

Silicate 0.5～1.5

Surfactant 0.5～1.5

Inorganic salts 2～5

Chain-breaker 1～2

Water 57～83

The production technology of extinguishing chemical;

Take by weighing each component according to prescription with electronics, add load weighted purifying waste water at reactor, stir, rotating speed is 30 rev/mins, water is heated to 30 ℃ ± 2 ℃ also keeps-----this moment that necessarily reaction takes place in the reactor, adds urea, stirs 40 minutes; Add ammonium hydrogen phosphate, stirred 30 minutes, add silicate, stirred 120 minutes; Add surfactant, stirred 30 minutes; Add inorganic salts, stirred 50 minutes; Add chain-breaker, stirred 30 minutes, be cooled to normal temperature.

Chemical equation:

CO(NH2)2+H2O→CO2+2NH3

(NH4)2HPO4→NH3+H3PO4

Claims

1. we have added chemical compositions such as urea, ammonium hydrogen phosphate in extinguishing chemical, and when the condition of a fire took place, ambient temperature rose, and these chemical compositions after the dispersion just can absorb heat, decomposite a large amount of inert gases, and on-the-spot temperature and oxygen concentration are minimized:

2. adding chain-breaker, it can when the condition of a fire takes place blocking-up chemical combustion chain rapidly;

3. adding silicate, when the condition of a fire took place, silicate and other substance reaction generated a kind of special material and can cover the surperficial of comburant thereby play the effect of starvation;

4. add the surfactant that from plant, refines, can significantly reduce the surface tension of liquid, make extinguishing chemical infiltrate solid interior better, greatly promote the ability of putting out the solid fire, when putting out the flammable liquid fire, can generate the surface that fine and close froth bed covers liquid with other substance reaction;

5. add the frost resistance that inorganic salts can increase extinguishing chemical.