KR970003481B1 - Process for preparation of extinguishant - Google Patents

Abstract

60 Kg of ammonium sulfate and 200 kg of water were dissolved in a closed vessel to give a solution having specific gravity of 2.7. 10 Kg of urea was added and agitated in the obtained solution to give a solution having specific gravity of 2.8. 10 Kg of Na3PO4= 12H2O was added and stirred the obtained solution(sp.gr 2.8) to give a solution having specific gravity of 2.9. 10 Kg of ammonium bicarbonate was added and agitated to give a solution having specific gravity of 3.0. 10 Kg of sodium carbonate was added and stirred in the solution(sp.gr 3.0) to give the extinguishant having specific gravity of 3.1.

Description

Method for preparing liquid extinguishing agent

The present invention is a sealed container equipped with a hydrometer and a stirrer ammonium sulfate [(NH ₄ ) ₂ SO ₄ ], water, urea [(NH ₄ ) ₂ CO], trisodium phosphate (Na ₃ PO ₄ , 12H ₂ O), When ammonium bicarbonate (NH ₄ HCO ₃ ) and sodium carbonate (Na ₂ CO ₃ ) are completely dissolved by inputting a certain ratio of raw materials in order, the specific gravity is 3.1 and it is a liquid with a specific gravity of 3.1. Invention.

In general, extinguishing agents

Extinguishing agents for extinguishing fires of dry materials such as wood and paper;

Extinguishing agent to extinguish fire such as special chemicals such as oil

· It is divided into fire extinguishing agent that extinguish fire by electric leakage.

Conventionally, foam fire extinguishers, powder fire extinguishers, ammonium phosphate fire extinguishers, carbon dioxide fire extinguishers, and halide extinguishing agents have been used, but the foam fire extinguishing agent should be stored at temperatures below 5 ° C. and frozen at temperatures below 5 ° C. Inconvenience and cost of replacement are uneconomical. On the other hand, powder fire extinguishers have low fire extinguishing efficiency in dry building fires such as wood and paper. Ammonium extinguishing agent has a problem that it is difficult to expect complete extinguishing due to insufficient penetration and adhesion of extinguishing agent to cotton, paper and sponge in general fire.In addition, carbon dioxide extinguishing agent has a risk of frostbite in the process of extinguishing fire, and ember remains If there was a problem that the fire was replayed, Gen cargo fire extinguishing agent also there is a danger that the ozone layer depleting substances in the atmosphere caused by the extinguishing medium produced halons also had a problem in use.

In order to solve the above problems, the present inventors dissolve the raw materials in a predetermined ratio at normal temperature and atmospheric pressure during the preparation of the extinguishing agent, and are extremely easy to dissolve. As it is 3.1, it is easy to manufacture without freezing at minus 20 ℃, economical without the hassle of changing digestive fluid every year, and there is no residual air pollution after use, and it is very easy to store even in winter due to low freezing point and very good extinguishing effect. Indicated.

The present invention will be described in more detail. When dissolution is completed while adding ammonium sulfate and water to a sealed container equipped with a hydrometer and a stirrer, urea [(NH ₂ ) ₂ CO] is added to dissolve and dissolve the sodium phosphate in this dissolved solution. (Na ₃ PO ₄ 12H ₂ O) was added, stirred and dissolved. Then, ammonium bicarbonate (NH ₄ HCO ₃ ) was added and dissolved. Then, sodium carbonate was added and dissolved in succession. No precipitate was formed. Its specific gravity is 3.1, so it has good adhesion when extinguishing, and it can prevent oxygen supply blocking and freezing of fire materials. Especially, it does not use aluminum sulfate [Al ₂ (SO ₄ ) ₃ · 18H2O] and calcium chloride (CaCl ₂ ). An excellent liquid extinguishing agent was prepared which excludes the formation of precipitates.

When described in detail according to the embodiment for the present invention by the following process.

1st process

60kg ammonium sulfate [(NH ₄ ) ₂ SO ₄ ] and 200kg of water are added to a sealed container equipped with a hydrometer and a stirrer, and stirred and dissolved to obtain a solution having a specific gravity of 2.7.

2nd process

10 kg of urea [(NH ₂ ) ₂ CO] was added to the solution having a specific gravity of 2.7 prepared in the first step, followed by stirring to give a solution having a specific gravity of 2.8.

3rd process

10 kg of sodium triphosphate (Na ₃ PO ₄ 12H ₂ O) was added to the solution having a specific gravity of 2.8 prepared in the second step, followed by stirring to obtain a solution having a specific gravity of 2.9.

4th process

10 kg of ammonium bicarbonate (NH ₄ HCO ₃ ) was added to the solution having a specific gravity of 2.9 prepared in the third step, followed by stirring to obtain a solution having a specific gravity of 3.0.

5th process

After adding 10 kg of sodium carbonate (Na ₂ CO ₃ ) to the solution of 3.0 specific gravity prepared in the 4th step and stirring, a special liquid extinguishing agent having a specific gravity of 3.1 without any precipitate is produced and can be easily used anytime, anywhere. Store in a prepared spray container.

The liquid extinguisher prepared as described above does not require about 2 hours of raw material input and agitation time in all processes, and is dissolved at room temperature and atmospheric pressure. Therefore, the method of preparation is extremely simple and no precipitate is formed even after a long period of time. It is not frozen at minus 20 ℃, so it is not only troublesome to replace fire extinguishing fluid, but also it is used for building fires where wood or interior materials are constructed of dry materials. The effect was excellent and the spraying distance could be sprayed far more than 15m.

Claims (1)

In the liquid extinguishing agent manufacturing method, 60 kg of ammonium sulfate and 200 kg of water are added to a sealed container equipped with a hydrometer and a stirrer to dissolve while stirring to obtain a specific gravity of 2.7. 10 kg of urea is added to the solution and 10 kg of trisodium phosphate is completely dissolved. 10 kg of ammonium bicarbonate is added to the dissolved solution to dissolve it, and the specific gravity is 3.0. 10 kg of sodium carbonate is added to the solution having a specific gravity of 3.0 kg. Method for producing a liquid fire extinguishing agent characterized in that the input dissolution.