Catalytic chemical coolant for hot aerosol and preparation method thereof

A chemical cooling and catalytic technology, applied in the direction of fire prevention equipment, etc., can solve the problems of poor vibration resistance, easy pulverization of coolant, and unfriendly environment, so as to improve the strength and surface finish, increase the content of active ingredients, and improve the environment. safety effect

Inactive Publication Date: 2010-06-30
SHAANXI J&R FIRE FIGHTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The downside of this coolant is that it produces toxic SO at high temperatures 2 Gas, unfriendly to the environment; low strength, poor vibration resistance, easy pulverization of the cooling cake; poor cooling effect; endothermic decomposition generates a large number of alkali metal compounds, which increases the secondary damage performance of the fire extinguishing agent
The disadvantages of this coolant are: the content of heat-absorbing cooling material is small, and the cooling effect is not good; the strength is low, the vibration resistance is poor, the coolant is easy to pulverize, and the blockage of the cooling channel is formed, which may cause fire when the fire extinguishing agent is released. Explosion hazard; nitrocellulose, plasticizer, stabilizer and other components are prone to produce CO and NO at high temperature X , NH 3 , HCN and other toxic gases; the water decomposed from a large amount of basic carbonate will form a viscous conductive liquid film on the protected object, causing secondary damage accidents
[0008] The above-mentioned coolants have their own characteristics, but none of them can ensure that they have comprehensive and excellent performance in terms of improving the fire extinguishing efficiency of fire extinguishing agents, controlling toxic gases, reducing secondary damage performance, and cooling effects.

Method used

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  • Catalytic chemical coolant for hot aerosol and preparation method thereof
  • Catalytic chemical coolant for hot aerosol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Prepare the coolant with the following ratio

[0054] Manganese carbonate 80% by mass

[0055] Zinc oxide 5% by mass

[0056] Iron oxide 5% by mass

[0057] Basic magnesium carbonate 5% by mass

[0058] Sodium silicate 2.5% by mass

[0059] Polyvinyl alcohol 1% by mass

[0060] Hydroxyethylcellulose 1% by mass

[0061] Zinc stearate 0.5% by mass

[0062] The production process is as follows: firstly weigh manganese carbonate, zinc oxide, iron oxide, and basic magnesium carbonate according to the proportion, then add them to a high-speed mixing granulator and mix them at high speed for 15 minutes; then add the weighed sodium silicate and polyvinyl alcohol to prepare The aqueous solution was first stirred at low speed for 5 minutes, and then granulated with high-speed shearing and stirring for 10 minutes; the prepared mixture was dried in an oven at 60°C for 4 hours, and after taking it out, it was placed in a tank mixer and stirred by adding zinc stearate. 5min; p...

Embodiment 2

[0065] Prepare the coolant with the following ratio

[0066] Manganese carbonate 95% by mass

[0067] Sodium silicate 2.5% by mass

[0068] Polyvinyl alcohol 1% by mass

[0069] Hydroxyethylcellulose 1% by mass

[0070] Graphite 0.5% by mass

[0071] The production process is as follows: first weigh the manganese carbonate and add it to a high-speed mixing granulator, then add the aqueous solution prepared by weighed sodium silicate and polyvinyl alcohol, first stir at a low speed for 5 minutes, and then granulate with high-speed shearing for 10 minutes; Dry the prepared mixture in an oven at 60°C for 4 hours, take it out, put it in a tank mixer, add weighed zinc stearate and stir for 5 minutes; put the above mixture into a rotary tablet press, pass through a non-penetrating die Pressed under the pressure of 200 MPa to form a tablet with a diameter of 8 mm; the prepared tablet was placed in a water chestnut type sugar coating machine, and the surface was coated with a weig...

Embodiment 3

[0074] Prepare the coolant with the following ratio

[0075] Manganese carbonate 50% by mass

[0076] Zinc oxide 15% by mass

[0077] Copper oxide 15% by mass

[0078] Basic magnesium carbonate 15% by mass

[0079] Sodium silicate 2.5% by mass

[0080] Polyvinyl alcohol 1% by mass

[0081] Hydroxyethylcellulose 1% by mass

[0082] Zinc stearate 0.5% by mass

[0083] The production process is as follows: firstly weigh manganese carbonate, zinc oxide, iron oxide, and basic magnesium carbonate according to the proportion, then add them to a high-speed mixing granulator and mix them at high speed for 15 minutes; then add the weighed sodium silicate and polyvinyl alcohol to prepare The aqueous solution was first stirred at low speed for 5 minutes, and then granulated with high-speed shearing and stirring for 10 minutes; the prepared mixture was dried in an oven at 60°C for 4 hours, and after taking it out, it was placed in a tank mixer and stirred by adding zinc stearate. 5m...

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PUM

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Abstract

The invention relates to a catalytic coolant used in a hot aerosol fire extinguishing device and a processing technique of the catalytic coolant. As to the coolant, heat absorption cooling components mainly include manganese carbonate or manganese oxalate, manganese phosphate, potassium manganate, metal carbonate of a family I, a family II and a transition family, basic carbonate, oxalate and the like; a metal oxide or a hydroxide are adopted as a catalyst, an oxidant and a reinforcing filling; stearate, graphite and the like are adopted as a processing aid; composite solution of alkalis silicate and a water soluble polymer is adopted as an adhesive; and film materials such as hydroxymethyl or hydroxyethyl cellulose are adopted as a surface coating agent. The processing technique includes the steps of mould pressing, squeezing, pelletizing, coating and forming. Compared with the prior art, the catalytic coolant not only has high intensity and good cooling effect, but also can reduce secondary damage of an extinguishing agent and eliminate the content of poisonous gases in an extinguishing agent product so as to improve the environmental safety of the extinguishing agent.

Description

technical field [0001] The invention belongs to the technical field of gas fire extinguishing in fire protection technology, and relates to a coolant used for cooling hot aerosol fire extinguishing smoke and a preparation process thereof, in particular to a catalytic coolant with good cooling effect and a preparation process thereof. Background technique [0002] The hot aerosol fire extinguishing agent initiator is a kind of pyrotechnic agent. When it releases the hot aerosol fire extinguishing agent, it will undergo a strong combustion reaction and release a large amount of heat. In order to avoid the occurrence of secondary fires, the fire extinguishing agent must be cooled. In the prior art prior to the present invention, commonly used cooling methods include chemical internal cooling, chemical external cooling, physical external cooling using refrigerant or low-temperature source, physical external cooling using structural design, and physical external cooling using pure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
CPCA62D1/06C09K21/00A62D1/00
Inventor 郭鸿宝宋瑞光
Owner SHAANXI J&R FIRE FIGHTING CO LTD
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