WO2014048275A1

WO2014048275A1 - Aerosol generation agent

Info

Publication number: WO2014048275A1
Application number: PCT/CN2013/083845
Authority: WO
Inventors: 郑高锋; 史军军; 赵小青; 高超
Original assignee: 西安坚瑞安全应急设备有限责任公司
Priority date: 2012-09-28
Filing date: 2013-09-19
Publication date: 2014-04-03
Also published as: CN102836517A

Abstract

Disclosed is an aerosol generation agent comprising an oxidizing agent, a reducing agent, and an adhesive. The oxidizing agent is potassium nitrate. The adhesive is phenolic resin. The reducing agent is one or multiple of tartaric acid, dihydroxy tartaric acid, ethylenediaminetetraacetic acid, salicylic acid, and phthalic anhydride. The preparation method is: dissolving the phenolic resin in ethanol to produce a phenolic resin solution having a mass concentration of 50% to 65%; crushing and mixing the oxidizing agent and the reducing agent, and adding in the phenolic resin solution; stirring, granulating, drying, and pressing to form shapes. The aerosol generation agent of the present invention can be used individually as a fire extinguishing agent, and can be used in combination with chemical cooling agents. As a thermal source and a power source for the chemical cooling agent, the aerosol generation agent can undergo full combustion, has little combustion residue and stable properties, and is easy to store for a long term as well as environmentally friendly.

Description

Aerosol generating agent

Technical field

The invention belongs to the field of aerosol fire extinguishing technology, and in particular relates to an aerosol generating agent and a preparation process thereof.

Background technique

Aerosol fire extinguishing agent is a new fire extinguishing agent with extremely high fire extinguishing efficiency, zero ozone depletion value ODN, non-toxic and harmless, no residue, low price and low equipment investment. Under the urgent background of halon elimination, it has obtained the government. The strong support also caters to the needs of the market, so aerosol fire suppression technology has become one of the most attractive halon replacement technologies in the past decade.

As a substitute for halon products, aerosol has the characteristics of high fire extinguishing performance and no secondary pollution. It has a wide range of applications in the domestic and international fire extinguishing industry. In existing products, the formulation of such generators mainly includes oxidants, reducing agents, binders, additives and processing aids. In these formulations, the selection of a suitable material not only greatly enhances the fire extinguishing performance of the agent, but also enhances the processing, storage, and use properties of the agent. These properties are also an integral part of the aerosol generating agent.

The patent application with the patent application number CN99115863.6 uses a formulation supplemented with potassium nitrate, melamine, phenolic resin, potassium ferricyanide and potassium bicarbonate, and a phenolic resin solution prepared by dissolving phenolic resin in ethanol. The concentration is 10% to 30%, and the fire extinguishing efficiency of the patent generating agent is 30 to 40 g/m3. U.S. Patent No. 6,024,664 (1998.07.21) also discloses an aerosol generating agent having a mass composition of: potassium nitrate 67% to 72%, phenolic resin 8% to 12%, dicyandiamide 9% to 16%. The balance is potassium hydrogencarbonate, potassium ferricyanide or potassium benzoate. The fire extinguishing agent composition has proved by formula test that the gas production amount when using dicyandiamide is low, and the fire extinguishing efficiency of the patent generating agent is 35 to 45 g/m3. The reducing agents commonly used in aerosol generating agents, such as melamine, dicyandiamide, etc., are all alkaline substances. If the object to be fired is acidic, it will cause corrosion and damage to some acidic equipment while extinguishing the fire. For example, if the oil tank is on fire, the existing aerosol fire extinguishing agent can extinguish the fire, but the alkaline substance will cause some components in the crude oil to saponify and flocculate, which will affect the performance of the crude oil and affect the reuse.

Summary of the invention

In order to solve the problems existing in the prior art, the present invention provides an aerosol generating agent which is simple in composition, large in gas production, fully combustible, and more suitable for acid fire extinguishing objects, and a preparation process thereof.

The technical solution of the present invention to solve the technical problem is:

An aerosol generating agent consisting of an oxidizing agent, a reducing agent and a binder; the oxidizing agent is potassium nitrate, and the binder is a phenolic resin, wherein the reducing agent is tartaric acid, dihydroxytartaric acid, and B One or more of diaminetetraacetic acid, salicylic acid, and phthalic anhydride.

The mass percentage of the reducing agent in the aerosol generating agent is 5% to 30%. Oxidant 65%~78%

Adhesive 9%~15%

Reducing agent 8%~20%

Further, each component of the aerosol generating agent is of a quality:

Oxidizer 68%~75%

Adhesive 10%~12%

Reducing agent 15%~20%

Another object of the present invention is to provide a process for preparing an aerosol generating agent, which is characterized in that:

1) dissolving the phenolic resin in ethanol to prepare a phenolic resin solution having a mass percentage of 50% to 65%;

2) The oxidant and reducing agent are pulverized to a fineness of 100-200 standard purpose, and mixed according to the ratio, and sieved three times with 100-200 mesh to make it evenly mixed;

3) Then add the phenolic resin solution to the mixed powder, force the mixing and stir evenly, then granulate with 40 target quasi-screen, and prepare the particles at a temperature of 25 °C~55 °C, humidity 30 Dry in an environment below % to a volatile content of no more than 1% in the composition.

4) The dried drug is press molded at a pressure of 3 MPa.

In the fire extinguishing composition of the present invention, the reducing agent is an acidic reducing substance such as tartaric acid, dihydroxytartaric acid, ethylenediaminetetraacetic acid, salicylic acid or phthalic anhydride, which is different from the basic reducing agent used in the prior art. On the one hand, it compensates for the shortcomings of the current conventional patents in which the use of an aerosol fire extinguishing agent containing an alkaline reducing agent is less effective or has a more negative impact on the protected object after use, such as in the case of crude oil fire extinguishing, due to the crude oil itself. It is weakly acidic. If an aerosol generating agent containing an alkaline reducing agent is used, the alkaline aerosol will greatly increase the chance of saponification reaction between the generating agent and the crude oil component to cause flocculation, which brings about subsequent processing of the crude oil. Trouble, and the aerosol generating agent produced by the aerosol generating agent of tartaric acid, dihydroxytartaric acid, ethylenediaminetetraacetic acid, salicylic acid, phthalic anhydride and the like is weakly acidic, and does not interfere with fire extinguishing. The reaction of crude oil components eliminates this negative effect; on the other hand, in combination with the use of chemical coolants, such as the use of acidic chemical coolants, acidic or neutral aerosol generators are required, otherwise the two The effect will greatly reduce the storage performance and fire extinguishing performance of the generator and chemical coolant. Therefore, the aerosol generating agent of the present invention is both a supplement to the existing aerosol fire extinguishing agent and an extension of its application field.

The advantages of the present invention over the prior art are:

1) The aerosol generating agent of the present invention can be used alone as a fire extinguishing agent, or can be used in combination with a chemical coolant as a heat source and a power source for a chemical coolant.

2) The aerosol generating agent of the present invention has stable performance, is easy to store for a long period of time, and is excellent in environmental friendliness.

3) The aerosol generating agent of the invention adopts an acidic reducing agent, and is more suitable for the object of partial acidity, and can effectively prevent corrosion and damage of certain acidic equipments and effectively affect the re-use.

4) The present invention optimizes the proportion of each component in the aerosol generating agent to make it according to the invention Under the preparation conditions, it can be fully burned, and the residual amount of the generator combustion is smaller.

detailed description

The fire extinguishing composition of the present invention will now be further described in conjunction with specific examples:

Example 1

12g of phenolic resin was dissolved in 8g of industrial alcohol to prepare a uniform phenolic resin ethanol solution. 77g of potassium nitrate and llg of tartaric acid were respectively sieved through a 200-mesh standard sieve and then uniformly mixed. The above-mentioned phenolic resin ethanol solution was added and stirred evenly. The 40 mesh sieve is granulated and dried in an environment of a temperature of 25 ° C to 55 ° C and a humidity of 30% or less until the volatile content of the composition is not more than 1%. When in use, according to the fire-extinguishing condition, a certain amount of aerosol generating agent particles are prepared into a cylindrical insertion device having a Φ25ιηιη under a pressure of not less than 3 MPa for a fire extinguishing test.

Example 2

Dissolving 13g of phenolic resin in 8g of industrial alcohol to prepare a uniform phenolic resin ethanol solution, respectively taking 74g of potassium nitrate, 5g of dihydroxytartaric acid and 8g of phthalic anhydride, respectively, through 200 mesh standard sieve, and then mixing uniformly, adding the above The phenolic resin ethanol solution is forcibly stirred uniformly, granulated by a 40-mesh sieve, and dried in an environment of a temperature of 25 ° C to 55 ° C and a humidity of 30% or less until the volatile content of the composition is not more than 1%. In use, according to the fire-extinguishing condition, a certain amount of aerosol generating agent particles are prepared to have a cylindrical insertion device having a diameter of 025 mm under a pressure of not less than 3 MPa for a fire extinguishing test.

Example 3

10 g of phenolic resin was dissolved in 6 g of industrial alcohol to prepare a uniform phenolic resin ethanol solution, and 70 g of potassium nitrate, 10 g of ethylenediaminetetraacetic acid and 10 g of phthalic anhydride were separately sieved through a 200-mesh standard sieve, and then uniformly mixed. The above phenolic resin ethanol solution is added to be uniformly stirred, granulated by a 40-mesh sieve, and dried in an environment of a temperature of 25 ° C to 55 ° C and a humidity of 30% or less until the volatile content of the composition is not more than 1%. In use, according to the fire-extinguishing condition, a certain amount of aerosol generating agent particles are prepared into a cylindrical placing device having a diameter of Φ 25 ηηη under a pressure of not less than 3 MPa for a fire extinguishing test.

Example 4

12 g of phenolic resin was dissolved in 9 g of industrial alcohol to prepare a uniform phenolic resin ethanol solution. 68 g of potassium nitrate and 20 g of salicylic acid were separately mixed through a 200-mesh standard sieve, and then uniformly mixed. The above-mentioned phenolic resin ethanol solution was added to be uniformly stirred. It is granulated by a 40-mesh sieve and dried in an environment of a temperature of 25 ° C to 55 ° C and a humidity of 30% or less until the volatile content of the composition is not more than 1%. In use, according to the fire-extinguishing condition, a certain amount of aerosol generating agent particles are prepared into a cylindrical insertion device having a Φ 25 ηηηη under a pressure of not less than 3 MPa for a fire extinguishing test.

Example 5

15 g of phenolic resin was dissolved in 10 g of industrial alcohol to prepare a uniform phenolic resin ethanol solution, and 65 g of potassium nitrate, 12 g of tartaric acid and 8 g of ethylenediaminetetraacetic acid were respectively sieved through a 200-mesh standard sieve, and then uniformly mixed, and the above phenolic resin was added. The ethanol solution is forcibly stirred uniformly, granulated by a 40-mesh sieve, and dried in an environment of a temperature of 25 ° C to 55 ° C and a humidity of 30% or less until the volatile content of the composition is not more than 1%. Make In use, according to the fire-extinguishing condition, a certain amount of aerosol generating agent particles are prepared to have a cylindrical insertion device having a diameter of 025 mm under a pressure of not less than 3 MPa for a fire extinguishing test.

Comparative example 1

U.S. Patent No. 6042664: contains 70% potassium nitrate, 12% dicyandiamide, 11% phenolic resin, and 7% potassium benzoate.

Comparative example 2

Chinese patent CN101745195A: Containing 70% potassium nitrate, 18% melamine, 12% phenolic resin. Comparative example 3

Chinese patent CN1288766A: Containing 69% potassium nitrate, 9% melamine, 6% phenolic resin, 10% potassium hydrogencarbonate, 7% potassium ferricyanide.

Table 1 is a comparative test of the aerosol generating agent of the present invention and the prior art:

[1] Test method reference GA499.1_2010 [2] It is a chemical coolant used in a commercially available PFE-1 type fire extinguisher, and its main components are ferrocene and oxalic acid.

It can be seen from the comparison of the above table that the fire extinguishing performance of the present invention is higher than that of US6042664 and CN1288766A, and is equivalent to the fire extinguishing performance of CN101745195A. When combined with the existing chemical coolant, the storage performance reaches the service life of the product for more than 6 years. Compared with the existing chemical coolant, the comparative invention has a storage period of less than one year, which is related to the main component of the chemical coolant used in PFE-1 containing oxalic acid. The above-described embodiments are merely exemplary, and those skilled in the art can make various modifications and changes based on the above-described embodiments, and the improvements or modifications fall within the scope of the present invention. . It should be understood by those skilled in the art that the foregoing description is only for the purpose of illustrating the invention.

Claims

claims

1. An aerosol generating agent, consisting of an oxidizing agent, a reducing agent, and a binding agent; the oxidizing agent is potassium nitrate, and the binding agent is a phenolic resin, characterized in that: the reducing agent is tartaric acid, dihydroxytartaric acid , one or more of ethylenediaminetetraacetic acid, salicylic acid, and phthalic anhydride.

2. An aerosol generating agent according to claim 1, characterized in that: the mass percentage of the reducing agent is 5% to 30%.

3. An aerosol generating agent according to claim 1 or 2, characterized in that: the mass percentage of each component in the aerosol generating agent is:

Oxidizing agent 65%~78%

Binder 9%~15%

Reducing agent 8%~20%.

4. An aerosol generating agent according to claim 3, characterized in that: the mass percentage of each component in the aerosol generating agent is:

Oxidizing agent 68%~75%

Binder 10%~12%

Reducing agent 15%~20%.

5. The preparation process of an aerosol generating agent according to claim 1, characterized in that:

1) Dissolve phenolic resin in ethanol to prepare a phenolic resin solution with a mass concentration of 50% to 65%;

2) Crush the oxidizing agent and reducing agent to a fineness of 100-200 standard mesh, mix them according to the proportion requirements, and sieve them three times with a 100-200 mesh mesh to make them evenly mixed;

3) Then add the phenolic resin solution to the mixed powder, forcefully mix and mix evenly, then use a 40-objective quasi-sieve to granulate, and place the prepared particles at a temperature of 25°C~55°C and a humidity of 30 Dry in an environment below % until the volatile content of the composition is no more than 1%.

4) Press the dried agent into shape under a pressure of 3MPa.