Mine waste heat recovery fireproof flame-retardant material

Abstract

The invention discloses a mine waste heat recovery fireproof flame-retardant material, and relates to the technical field of flame-retardant materials. The flame-retardant material comprises an additive, an adhesive, a surfactant, dispersed latex powder, an inhibitor, a dispersing agent and water. The flame-retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating the additive, the adhesive, the surfactant, the dispersed latex powder, the inhibitor, the dispersing agent and the water. The flame-retardant material prepared from the formula components is a highly concentrated solution, the use cost is effectively reduced, the operation is simpler in the use process, the effect is more complete, equipment is protected from being damaged, the flame-retardant material is sprayed on a coal body, a layer of nano-scale protective film is formed on the surface of the coal body, the coal body is prevented from being in contact with oxygen at a microscopic level, and the oxygen content is reduced. Unsaturated functional groups in the molecular structure of the coal are inerted, the oxidation activity of the coal is improved, the critical temperature of the coal in each oxidation stage is increased, the oxidation speed of the coal is fundamentally reduced, and then the purpose of preventing spontaneous combustion of the coal is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardant materials, and in particular to a fireproof and flame retardant material for mine waste heat recovery. Background Art

[0002] Spontaneous combustion of coal is one of the major natural disasters faced in coal mining. It can not only burn natural resources and cause huge economic losses, but also produce a large amount of harmful gases such as CO, H2S, SO2, etc., seriously polluting the air and environment. In addition, spontaneous combustion of coal often causes accidents such as gas combustion and dust explosion, causing serious casualties. Therefore, we must regard safe production as a long-term and arduous task, mobilize the whole society, work together, and make every effort to promote it; Among all coal mines in my country, nearly 73% are at risk of spontaneous combustion, and one-third of coal mine safety accidents are related to spontaneous combustion of coal. During the spontaneous combustion of coal, many harmful gases are produced, such as carbon monoxide, carbon dioxide, sulfur-containing gases and a series of nitrogen-containing gases. These gases are all greenhouse gases, which will cause serious problems such as atmospheric pollution, climate warming, and increased acid rain. Relevant data show that the annual greenhouse gas emissions in Xinjiang are as high as 12.38 million tons. At present, the carbon dioxide emissions caused by the spontaneous combustion of coal in my country account for 2%-3% of the total carbon dioxide emissions in the world. Due to the spontaneous combustion of coal, the safe production of coal mines can no longer be guaranteed, the ecological environment of coal storage yards and mining areas has been greatly damaged, and air pollution has also intensified and led to global warming. Therefore, targeted technical measures must be taken to prevent and control them to ensure that there are no safety hazards in coal mine production; Mine fires are divided into two types: internal fires and external fires: 1. External fires are fires caused by external fire sources, such as open flames caused by lights, matches, smoking, stoves, blasting, mechanical friction, electric welding, current short circuits, etc. Fires caused by spontaneous combustion of coal are called internal fires, which account for about 75% of the total number of mine fires; Second, the occurrence of internal fires is often accompanied by a gestation process. It can be discovered in the early stage based on signs, but because the fire source is hidden, it is difficult to accurately find the source of the combustion and quickly block it; In the field of mine fire safety, most of the focus is on early warning systems and equipment, such as coal bunker spontaneous combustion monitoring devices, coal spontaneous combustion visual dynamic monitoring and early warning systems, etc. However, this method cannot eliminate the occurrence of fires from the root. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a fire-retardant material for mine waste heat recovery.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a fire-retardant material for mine waste heat recovery, the fire-retardant material comprises the following components: Additives, adhesives, surfactants, dispersed latex powder, inhibitors, dispersants and water.

[0005] Preferably, the flame retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating additives, binders, surfactants, dispersed latex powder, inhibitors, dispersants and water.

[0006] Preferably, the inhibitor is sodium sulfide, and the dispersant is any one of sodium dodecyl sulfate, methyl amyl alcohol, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.

[0007] Preferably, the additive is any one of coal cinder and coal ash, or a mixture of the two.

[0008] Preferably, the adhesive is water-based polyurethane.

[0009] Preferably, the surfactant is any one of sodium secondary alkyl sulfonate, sodium α-olefin sulfonate and sodium lauryl alcohol polyoxyethylene ether carboxylate.

[0010] Preferably, the dispersed latex powder is any one of vinyl acetate and ethylene copolymer rubber powder, acrylate and styrene copolymer rubber powder, vinyl acetate homopolymer rubber powder and styrene and butadiene copolymer rubber powder.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the flame retardant material prepared by the formula components is a highly concentrated liquid, which effectively reduces the use cost, is simpler to operate during use, has a more complete effect, and protects the equipment from loss; 2. In the present invention, by spraying the flame retardant material on the coal body, a nano-scale protective film is formed on the surface of the coal body, thereby blocking the contact between the coal body and oxygen at the microscopic level, inerting the unsaturated functional groups in the coal molecular structure and the oxidation activity of the coal, raising the critical temperature of the coal at each oxidation stage, and fundamentally reducing the oxidation rate of the coal, thereby achieving the purpose of preventing the spontaneous combustion of the coal. DETAILED DESCRIPTION

[0012] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0013] Embodiment: The present invention provides a fire-retardant material for recovering waste heat from a mine, the fire-retardant material comprising the following components: Additives, adhesives, surfactants, dispersed latex powder, inhibitors, dispersants and water.

[0014] The flame retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating additives, a binder, a surfactant, dispersed latex powder, an inhibitor, a dispersant and water.

[0015] The inhibitor is sodium sulfide, and the dispersant is any one of sodium dodecyl sulfate, methyl amyl alcohol, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.

[0016] The additive is any one of coal cinder and coal ash or a mixture of the two.

[0017] The adhesive is water-based polyurethane.

[0018] The surfactant is any one of sodium secondary alkyl sulfonate, sodium α-olefin sulfonate and sodium lauryl alcohol polyoxyethylene ether carboxylate.

[0019] The dispersed latex powder is any one of vinyl acetate and ethylene copolymer rubber powder, acrylate and styrene copolymer rubber powder, vinyl acetate homopolymer rubber powder and styrene and butadiene copolymer rubber powder.

[0020] The flame retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating additives, adhesives, surfactants, dispersed latex powder, inhibitors, dispersants and water. After being sprayed on the coal body, the coal body is moistened and penetrated into the coal particles, so that the coal body maintains a high moisture content, thereby causing gelation. Under the action of gel, it can adsorb and capture nano-scale coal particles, and after air drying, a stable dense film is formed with extremely small gaps in the middle. At the same time, a nano-scale soft film is formed, which effectively consolidates the coal body and It stably adheres to the surface of the coal powder layer to achieve the effect of isolating contact oxidation. At the same time, the flame retardant material has a network structure with a certain degree of cross-linking. The coal body will be agglomerated together and locked in a solid network structure. The network structure has good ductility. After forming a nano-scale soft film, it is not easy to dissolve with rainwater and is not easy to disperse with external force. It can maintain a good isolation effect for a long time. It has the characteristics of fast film forming speed, good film ductility and good waterproof effect. At the same time, it has a certain air permeability to avoid spontaneous combustion of the coal body caused by lack of air circulation after film formation.

[0021] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fire-retardant material for mine waste heat recovery, characterized in that: The flame retardant material comprises the following components: Additives, adhesives, surfactants, dispersed latex powder, inhibitors, dispersants and water.

2. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The flame retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating additives, a binder, a surfactant, dispersed latex powder, an inhibitor, a dispersant and water.

3. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The inhibitor is sodium sulfide, and the dispersant is any one of sodium dodecyl sulfate, methyl amyl alcohol, polyacrylamide, guar gum and fatty acid polyethylene glycol ester.

4. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The additive is any one of coal cinder and coal ash or a mixture of the two.

5. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The adhesive is water-based polyurethane.

6. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The surfactant is any one of sodium secondary alkyl sulfonate, sodium α-olefin sulfonate and sodium lauryl alcohol polyoxyethylene ether carboxylate.

7. The fire-retardant material for mine waste heat recovery according to claim 1, characterized in that: The dispersed latex powder is any one of vinyl acetate and ethylene copolymer rubber powder, acrylate and styrene copolymer rubber powder, vinyl acetate homopolymer rubber powder and styrene and butadiene copolymer rubber powder.