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Multifunctional plugging agent for coal mine and preparation method thereof

A multi-functional, plugging agent technology, used in mining equipment, chemical instruments and methods, fire protection equipment, etc., can solve the problems of long fire extinguishing period, loss of plugging function, easy water loss and rupture, etc., to improve the characteristic temperature point, The effect of reducing CO release rate and improving stability

Active Publication Date: 2022-02-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the practical application of grouting technology, the liquid will flow from high to low along the terrain, so it is difficult to evenly cover the coal body or the surface of the goaf, let alone seal the cracks above the goaf; for the method of injecting inert gas, due to The goaf is easy to communicate with the outside world and difficult to form a closed space, so the gas leaks out as a whole, the concentration gradually decreases, and oxygen gradually enters, making it less effective in preventing fire extinguishing, and the fire extinguishing cycle is relatively long; Pile up in goafs to seal high-level fissures, but they are prone to dehydration and rupture, and lose the sealing function; although polyurethane sealing materials can effectively seal the coal seam gaps and isolate oxygen, polyurethane itself is an organic combustible material, which not only cannot inhibit the spontaneous combustion of coal seams, And once the coal seam catches fire, the organic sealing agent will also burn and carbonize, releasing a lot of heat to promote the coal mine fire, and releasing a large amount of toxic gas to endanger the life safety of mine workers

Method used

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  • Multifunctional plugging agent for coal mine and preparation method thereof
  • Multifunctional plugging agent for coal mine and preparation method thereof
  • Multifunctional plugging agent for coal mine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Soak the gooseberries in fresh water for 3 hours in a light-tight tank, take them out, rinse them twice with running water, put them in a drying oven, dry them at 90°C for 50 minutes, put them in a grinder and crush them for 5 minutes, and filter the gooseberries with a particle size of less than 120 mesh Vegetable powder. Weigh 25kg of gooseberry powder into a reaction vessel and mix it with 1000kg of water to obtain a suspension of gooseberry, raise the temperature to 45°C, stir in an air atmosphere and slowly add phosphorus pentoxide until the suspension has a pH of 5.5, and stir for 30 minutes. Add carboxypeptidase: β-glucosidase = 1:2 compound enzyme 10.25kg, continue to stir for 30min, let it stand for 50h, and filter to obtain the biological extract of Scherichia safflower.

[0026] Add urea to the above-mentioned Scherichia biscuit extract until the solution is neutral, stir for 20 minutes, heat up to 60°C, stir under a nitrogen atmosphere, and add 0.5kg of Mg-A...

Embodiment 2

[0029] Soak the gooseberries in fresh water for 3 hours in a light-tight tank, take them out, rinse them twice with running water, put them in a drying oven, dry them at 90°C for 50 minutes, put them in a grinder and crush them for 5 minutes, and filter the gooseberries with a particle size of less than 120 mesh Vegetable powder. Weigh 25kg of gooseberry powder into a reaction container and mix it with 1000kg of water to obtain a suspension of gooseberry, raise the temperature to 45°C, stir in an air atmosphere and slowly add phosphorus pentoxide until the suspension has a pH of 6, and stir for 30 minutes. Add carboxypeptidase: cellobiase: endoglucose = 10.25 kg of compound enzyme of 1:1:1, continue to stir for 30 minutes, leave to react for 50 hours, and filter to obtain Scherichia safflower biological extract.

[0030] Add urea to the above-mentioned Scherichia biscuit extract until the solution is neutral, stir for 20 minutes, heat up to 60°C, stir under a nitrogen atmosphe...

Embodiment 3

[0033] Soak the gooseberries in fresh water for 3 hours in a light-tight tank, take them out, rinse them twice with running water, put them in a drying oven, dry them at 90°C for 50 minutes, put them in a grinder and crush them for 5 minutes, and filter the gooseberries with a particle size of less than 120 mesh Vegetable powder. Weigh 25kg of gooseberry powder into a reaction vessel and mix it with 1000kg of water to obtain a suspension of gooseberry, raise the temperature to 45°C, stir under air atmosphere and slowly add phosphorus pentoxide until the suspension has a pH of 5.8, stir and react for 30 minutes Add 10.25 kg of compound enzyme of cellobiase: endoglucose = 1:1, continue to stir for 30 minutes, let stand for reaction for 50 hours, and filter to obtain Scherichia safflower biological extract.

[0034] Add urea to the above-mentioned Scherichia biscuit extract until the solution is neutral, stir for 20 minutes, heat up to 60°C, stir under a nitrogen atmosphere, and ...

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Abstract

The invention belongs to the technical field of fire prevention and extinguishing materials for coal mines, and in particular relates to a multifunctional sealing agent for coal mines and a preparation method thereof. In the present invention, the leprosy suspension is mixed and reacted with phosphorus pentoxide by using the leprosy as the raw material, and then biodegraded to obtain the leprosy biological extract, urea is added for neutralization, and the neutralized product is mixed with an inorganic catalyst and melamine for reaction. The bio-based plugging synergist solution is obtained, and finally the bio-based plugging synergist solution is cooled and mixed with a certain amount of pentaerythritol and ammonium polyphosphate to obtain a multifunctional plugging agent for coal mines based on the bio-extraction of Scherichia chinensis. The invention not only can effectively seal coal fissures for a long time, but also can effectively prevent coal from burning in the whole cycle (including low temperature, medium temperature and high temperature).

Description

technical field [0001] The invention belongs to the technical field of fire prevention and extinguishing materials for coal mines, and relates to a multifunctional sealing agent for coal mines and a preparation method thereof, in particular to a multifunctional sealing agent for coal mines and a preparation method thereof based on the bio-extraction liquid of Scherichia chinensis. Background technique [0002] my country's energy distribution has the characteristics of "rich in coal, poor in oil, and low in gas". Although the awareness of environmental protection has gradually increased in recent years, and the development and utilization of new energy sources have gradually developed, due to the limitations of cost and technology, the main part of my country's energy consumption is still It is coal. However, according to statistics, more than half of the key state-owned coal mines in my country have the danger of spontaneous combustion, and more than 90% of them are caused b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/42C09K21/06C09K21/14A62D1/00A62D1/02A62D1/06B01J20/08B01J20/30E21F5/00E21B33/13
CPCC09K8/426C09K21/06C09K21/14A62D1/00A62D1/0071A62D1/06B01J20/08B01J20/3078E21F5/00E21B33/13C09K21/02E21F15/005A62D1/005B01D11/0288
Inventor 程卫民胡相明颜丙瑞赵艳云薛迪吴明跃贺正龙白光星牟宗磊
Owner SHANDONG UNIV OF SCI & TECH
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