阅读说明：本技术 一种用于扑灭棉花堆垛深位火灾的水基灭火剂 (Water-based fire extinguishing agent for extinguishing cotton stacking deep fire ) 是由 伍晗 吕东 姜楠 于 2019-09-24 设计创作，主要内容包括：本发明涉及一种用于扑灭棉花堆垛深位火灾的水基灭火剂,该灭火剂的各组分及质量百分比为：碳酸钠：5％；尿素：10％；乙二醇：5％；聚氧乙烯脱水山梨醇单油酸酯(Tween—80)：0.5％；余量为水。本发明灭火剂可用于细水雾系统、自动喷淋、手持式灭火器、消火栓系统、移动式喷水系统中。使用本发明所述灭火剂,能迅速渗透至棉花堆垛表层以下,能有效的对发生阴燃的棉花堆垛进行降温、润湿、隔绝氧气,使其完全熄灭。(The invention relates to a water-based fire extinguishing agent for extinguishing a cotton stack deep fire, which comprises the following components in percentage by mass: sodium carbonate: 5 percent; urea: 10 percent; ethylene glycol: 5 percent; polyoxyethylene sorbitan monooleate (Tween-80): 0.5 percent; the balance being water. The fire extinguishing agent can be used in water mist systems, automatic spraying, hand-held fire extinguishers, fire hydrant systems and mobile water spraying systems. The fire extinguishing agent can quickly permeate below the surface layer of the cotton stack, and can effectively cool, wet and isolate oxygen for the smoldering cotton stack to be completely extinguished.)

1. a water-based fire extinguishing agent for extinguishing cotton stacking deep fire is characterized in that: the fire extinguishing agent comprises the following components in percentage by mass: sodium carbonate: 5 percent; urea: 10 percent; ethylene glycol: 5 percent; polyoxyethylene sorbitan monooleate (Tween-80): 0.5 percent; the balance being water.

2. A method of preparing the water-based fire extinguishing agent according to claim 1, wherein: the method comprises the following steps:

1) weighing the components according to the mass percentage;

2) adding sodium carbonate, urea and glycol into water, and stirring until the sodium carbonate, the urea and the glycol are dissolved, wherein the order of adding the sodium carbonate, the urea and the glycol into the water is not required;

3) then adding polyoxyethylene sorbitan monooleate (Tween-80), stirring until the polyoxyethylene sorbitan monooleate is dissolved, and clarifying the solution to obtain the fire extinguishing agent.

3. Use of the water-based fire extinguishing agent of claim 1 in a fire extinguishing agent for extinguishing deep-seated fires in cotton stacks.

4. Use according to claim 3, characterized in that: the fire extinguishing agent is used in systems such as a water mist fire extinguishing system, an automatic water spraying fire extinguishing system, a fire hydrant system, a handheld fire extinguisher and the like.

Technical Field

The invention relates to a water-based fire extinguishing agent, in particular to a water-based fire extinguishing agent for extinguishing cotton stacks, and particularly aims at deep-position fire extinguishing of cotton.

Background

The main component of cotton is cotton fiber, which has hygroscopicity and porosity, is easy to absorb moisture and release heat in a humid environment, and can also ferment, oxidize and release heat, and the porosity of the cotton fiber causes slow heat conduction and good heat storage, so that spontaneous combustion is easy to occur. The cotton placed in a stacking mode has stronger heat storage capacity, is easier to generate spontaneous combustion, and forms solid deep fire. In addition, cotton is also easy to smolder, because a small amount of air exists in cotton fiber pores, the cotton can be maintained to be locally or slowly burned in a small range under the condition of insufficient external oxygen, namely smoldering occurs, the burning is not easy to be perceived, the burning can last for days or even dozens of days, and serious fire accidents are easily caused.

Cotton fiber should have good wettability in view of molecular structure, but it has poor wettability because it contains about 6% of cellulose symbiont. The spraying of conventional agents onto cotton stacks tends to extinguish only surface fires. For the fire disaster in the deep position of the cotton stack, the common medicament is difficult to permeate the cotton, the extinguishing effect is very little, and the cotton in the deep position needs to be repeatedly stirred to extinguish the fire during fire extinguishing and rescue, so that the workload of extinguishing the fire disaster is large, and the time for extinguishing the fire disaster is long.

Disclosure of Invention

The invention provides a water-based fire extinguishing agent for extinguishing a cotton stack deep fire and a preparation method thereof, aiming at overcoming the defects of the existing fire extinguishing agent in extinguishing the cotton stack deep fire.

The technical scheme adopted by the invention is as follows:

the invention provides a water-based fire extinguishing agent for extinguishing a cotton stack deep fire, which comprises the following components in percentage by mass:

sodium carbonate: 5 percent; urea: 10 percent; ethylene glycol: 5 percent; polyoxyethylene sorbitan monooleate (Tween-80): 0.5 percent; the balance being water.

The invention also provides a preparation method of the fire extinguishing agent, which comprises the following steps:

1) weighing the components according to the mass percentage;

2) adding sodium carbonate, urea and glycol into water, and stirring until the sodium carbonate, the urea and the glycol are dissolved, wherein the order of adding the sodium carbonate, the urea and the glycol into the water is not required;

3) then adding polyoxyethylene sorbitan monooleate (Tween-80), stirring until the polyoxyethylene sorbitan monooleate is dissolved, and clarifying the solution to obtain the fire extinguishing agent.

The invention also provides the application of the water-based fire extinguishing agent in a fire extinguishing agent for extinguishing a fire disaster in a deep position of a cotton stack.

In particular, in the above applications, the fire extinguishing agent is used in water mist fire extinguishing systems, automatic sprinkler systems, fire hydrant systems, hand-held fire extinguishers and the like.

The water-based fire extinguishing agent is prepared by dissolving sodium carbonate, urea, glycol and polyoxyethylene sorbitan monooleate in water. The sodium carbonate alkalescent substance is beneficial to the breakage of a few fine fibers in the cotton and the infiltration of moisture among the cotton. The cotton mainly comprises cellulose, and hydroxyl hydrogen on the cellulose can form hydrogen bonds with nitrogen on amine groups in urea, so that the increase of micropores of the cotton is promoted, the amount of water adsorbed and kept near the free hydroxyl is increased, and the penetration of water in the cotton is increased. The glycol can make the cotton blocks shrink, so that gaps among different cotton groups are enlarged, and the glycol has an auxiliary permeation effect. The Tween-80 is a nonionic surfactant, can emulsify the grease on the surface of cotton, promote the adhesion performance of water and the surface of the cotton, reduce the floating and blocking capacity of the grease on the surface of the cotton to the water, and is favorable for the penetration of the water.

The invention has the beneficial effects that:

the fire extinguishing agent can be used in water mist systems, automatic spraying, hand-held fire extinguishers, fire hydrant systems and mobile water spraying systems. The fire extinguishing agent can quickly permeate below the surface layer of the cotton stack, and can effectively cool, wet and isolate oxygen for the smoldering cotton stack to be completely extinguished.

Drawings

FIG. 1 is a graph of temperature versus time for 4 sensors of experiment 1;

fig. 2 is a graph of temperature versus time for 4 sensors of experiment 2.

Detailed Description

The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.