Foamed sodium alginate hydrogel, preparation method thereof, and fire extinguishing device

A sodium alginate and hydrogel technology, applied in fire protection equipment and other directions, can solve the problems of high density, easy foam rupture, rupture and failure, etc., and achieve the effect of wide application range, improved fire extinguishing effect, and strong universality.

Active Publication Date: 2019-08-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foam formed by the current foam fire extinguishing agent is not resistant to burning, and it will soon burst and fail in the scorching fire, resulting in poor fire extinguishing effect
[0004] Therefore, in view of the problems that the existing hydrogel fire extinguishing material has a high density, is not suitable for fighting Class B liquid fires, and the foam produced by the foam fire extinguishing agent is easy to break, it is potential to develop a fire extinguishing agent with low density and stable foam for a long time. Must do

Method used

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  • Foamed sodium alginate hydrogel, preparation method thereof, and fire extinguishing device
  • Foamed sodium alginate hydrogel, preparation method thereof, and fire extinguishing device
  • Foamed sodium alginate hydrogel, preparation method thereof, and fire extinguishing device

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preparation example Construction

[0041] The second embodiment of the present invention also provides a method for preparing foamed sodium alginate hydrogel, the hydrogel comprising soluble alginate, soluble calcium salt and water, figure 2 It is a schematic diagram of the steps of the preparation method of the foamed sodium alginate hydrogel of the embodiment of the present invention, as figure 2 Shown, this preparation method comprises the following steps:

[0042] S1. Mix the soluble alginate and bicarbonate to obtain a first mixed solution.

[0043] S2. Mixing the soluble calcium salt and the soluble aluminum salt to obtain a second mixed solution;

[0044] S3. Mix the first mixed solution and the second mixed solution, and foam the hydrogel to prepare foamed sodium alginate hydrogel.

[0045] In step S1, in the first mixed solution, the mass fraction of the soluble alginate in water is 0.2-1 wt%, and the mass fraction of the bicarbonate in water is 4-6 wt%;

[0046] In step S2, in the second mixed so...

Embodiment 1

[0050] A foaming sodium alginate hydrogel prepared from the following raw material components: A. sodium alginate, B. sodium bicarbonate, C. calcium chloride, D. aluminum chloride hexahydrate, E. water, Concrete preparation, use method comprise the following steps:

[0051] (1) 2g sodium alginate, 40g sodium bicarbonate are evenly mixed and dissolved in 1000g deionized water to obtain mixed solution I;

[0052] (2) 10g of calcium chloride and 30g of aluminum chloride hexahydrate were mixed and dissolved in 1000g of deionized water to obtain mixed solution II;

[0053] (3) First spray the mixed solution I onto the surface of the combustion object, and then spray the mixed solution II onto the surface of the combustion object, the sodium alginate and calcium and aluminum ions are instantly cross-linked, and the sodium bicarbonate and aluminum ions are instantly foamed to form a hydrogel The foam layer covers the surface of the burning object and extinguishes the fire source.

Embodiment 2

[0055] A foaming sodium alginate hydrogel fire extinguishing agent, prepared from the following raw material components: A. Sodium alginate, B. Potassium bicarbonate, C. Calcium bromide, D. Aluminum sulfate, E. Water, specifically The preparation and use methods comprise the following steps:

[0056] (1) 6g sodium alginate, 45g potassium bicarbonate are evenly mixed and dissolved in 1000g deionized water to obtain mixed solution I;

[0057] (2) Dissolve in 1000g deionized water after mixing 20g calcium bromide and 45g aluminum sulfate to obtain mixed solution II;

[0058] (3) Spray mixed solution I and mixed solution II onto the surface of the combustion object at the same time, sodium alginate and calcium and aluminum ions are instantly cross-linked, potassium bicarbonate and aluminum ions are instantly foamed to form a hydrogel foam layer covering the surface of the combustion object , Extinguish the fire source.

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Abstract

The present invention provides a foamed sodium alginate hydrogel. The foamed sodium alginate hydrogel comprises: a hydrogel, wherein the hydrogel comprises soluble alginate, a soluble calcium salt andwater; and a foaming agent for being mixed with the hydrogel to produce a low-density hydrogel-CO2 foam, and the hydrogel-CO2 foam covers a combusting object. The hydrogel-CO2 foam produced in the invention can stably exist for a long time, has a small density, and can cover the surface of the combusting object to isolate the combusting object from air in order to achieve the fire extinguishing effect, and the CO2 gas released after rupture of the hydrogel-CO2 foam can further enhance the fire extinguishing effect.

Description

technical field [0001] The invention relates to the technical field of fire extinguishing agent production, in particular to a foamed sodium alginate hydrogel, a preparation method thereof, and a fire extinguishing device. Background technique [0002] Fire is a disaster with the highest probability of occurrence among various natural and social disasters, which poses a serious threat to human life and even life safety. According to national standards, fires are divided into Class A fires: solid substance fires; Class B fires: liquid or meltable solid substance fires; Class C fires: gas fires; Class D fires: metal fires; Class E fires: live fires, objects Electrically charged fires; Class F fires: fires of cooking items (such as animal and vegetable fats) in cooking appliances. Among them, Class B liquid fires are difficult to extinguish, prone to explosion, easy to expand and overflow when heated, high temperature, and large opening area. Once it occurs, it will cause huge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/02
CPCA62D1/0064A62D1/0071A62D1/0092
Inventor 张凯卢宝阳朱秀凯渐南南薛羽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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