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Fire extinguishing composition based on potassium bicarbonate dry powder and preparation method thereof

A kind of technology of potassium bicarbonate dry powder and fire-extinguishing composition, which can be used in fire protection equipment and other directions, and can solve the problem of high production cost of base material

Active Publication Date: 2022-07-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the actual fire extinguishing agent does not pursue MC 2 N 2 h 3 o 3 content, but as an additive form, the technology uses MC 2 N 2 h 3 o 3 As a base material, the production cost is high, and there are risks in the water vapor working condition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of above-mentioned dry powder fire extinguishing agent is:

[0025] Step 1, crude product preparation

[0026] Place 190 parts of potassium bicarbonate in a heating mixer, stir and heat up to 140 ° C under the rotating speed of 300 r / min, after constant stirring for 15 min under this condition, add 130 parts of urea at an average rate for 2 hours, and keep at 140 during the addition process. Continue stirring at a temperature of ℃ and a rotating speed of 300 r / min. After adding, keep the temperature and continue stirring for 10 minutes. After the powder in the container is uniformly mixed and reacted, it is taken out to obtain a crude solid mixture;

[0027] Step 2. Mechanical crushing

[0028] The obtained crude solid mixture was put into a ball mill, ground at 1200 r / min for 60 minutes, sieved and filtered to remove the grinding medium, dried at 70°C for 16 h, ground and sieved to obtain pulverized material;

[0029] Step 3, modification treat...

Embodiment 2-5

[0033] The other steps of embodiment 2-5 are the same as in embodiment 1, and the difference is that the components and parts of the potassium bicarbonate dry powder are adjusted, and the specific adjustment situation is shown in Table 1 below.

[0034] The composition ratio table of the potassium bicarbonate dry powder of table one embodiment 1-5

[0035] Example 1 Example 2 Example 3 Example 4 Example 5 Potassium bicarbonate 190 200 210 230 250 Urea 130 120 110 90 70 talcum powder 18 18 18 18 21 Silica 16 16 18 16 16 Mica powder 4 4 5 4 4 activated clay 3 3 3 3 3 Magnesium stearate 3 3 3 3 3 Methyl Hydrogen Silicone Oil 9 9 10 10 9

Embodiment 6

[0037] The other steps of Example 6 are the same as those of Example 1, except that the temperature of the stirring in step 1 is changed to 140°C and the temperature is raised to 130°C.

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PUM

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Abstract

The invention relates to a fire extinguishing composition based on potassium bicarbonate dry powder and a preparation method thereof. The fire extinguishing composition comprises the following components in parts by weight: 190-250 parts of potassium bicarbonate, 70-130 parts of urea, 14-21 parts of talcum powder, 13-18 parts of white carbon black, 3-5 parts of mica powder, 2-4 parts of activated clay, 2-4 parts of magnesium stearate and 7-11 parts of silicone oil. In the preparation process, potassium bicarbonate is used as a base material, urea is added into the base material by controlling the adding time, and the product efficiency is improved through ultra-refining and modification. The dry powder extinguishing agent disclosed by the invention has long protection time on a fire scene, and has excellent reburning resistance and total flooding characteristic.

Description

technical field [0001] The invention belongs to the field of fire extinguishing agents, in particular to a fire extinguishing composition based on potassium bicarbonate dry powder and a preparation method thereof. Background technique [0002] Due to the restrictions on halon fire extinguishing agents, ultra-fine dry powder fire extinguishing agents rely on their non-toxicity or low toxicity, and are less irritating to people. The ozone depletion value (ODP) is 0, the greenhouse effect value (GWP) is 0, and the atmospheric retention time ( ALT) is short, the environmental protection performance is good, and it will not cause secondary damage, making it one of the good substitutes for halon fire extinguishing agents. [0003] Among them, the BC type dry powder fire extinguishing agent based on carbonate is widely used in extinguishing liquid and gas fires, while the traditional carbonate dry powder fire extinguishing agent does not have excellent total submergence fire exting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/0014
Inventor 谭朝阳常振翔杨振寇梦华胡文豪周晓猛
Owner HEBEI UNIV OF TECH
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