38results about How to "Good explosion suppression effect" patented technology

The invention discloses a system and method for utilizing flue gas circulation to prevent deflagration of a hearth bottom. A CO concentration online monitoring point is arranged at the bottom of a cold ash hopper area to monitor CO concentration signals of the area on line, opening of explosion suppression air regulating valves is controlled after analysis is performed through a CO concentration online monitoring system connected with the CO concentration online monitoring point, flue gas passing through a coal economizer is sent to the boiler cold ash hopper area through the explosion suppression air regulating valves in a vertically staggered hedging mode, good explosion suppression characteristics of high-concentration CO2, N2 and vapor in the flue gas are utilized to reduce a deflagration concentration interval of the reducing combustible gas CO in the area and deflagration strength which may occur, and the goal of preventing, weakening and eliminating deflagration is achieved. The system is of great significance for safe operation of a large power station boiler under the conditions of coal quality fluctuation.

The invention belongs to the field of anti-explosion agents, and relates to an ultra-fine montmorillonite-based core-shell structure anti-explosion agent and a preparation method thereof. The ultra-fine montmorillonite-based core-shell structure anti-explosion agent is prepared from the following components in parts by weight: 3-7 parts of montmorillonite, 1-5 parts of a fire-suppressing agent and1-2 parts of a grinding aid. The ultra-fine montmorillonite-based core-shell structure anti-explosion agent is composite powder of an ultra-fine fire-suppressing agent, the montmorillonite and grinding aid formed by composite powder of the fire-suppressing agent and the montmorillonite and the grinding aid through a ball milling method. The ultra-fine montmorillonite-based core-shell structure anti-explosion agent has the characteristics of being environmentally friendly, delicate, uniform, high in efficiency, good in fluidity and the like, and the preparation method is simple to operate andlow in pollution, and liable to realize industrial production.

The invention discloses a preparation method and a use method of a dust explosion suppressor based on a microbial capsule, and belongs to the technical field of preparation of the dust explosion suppressor. The method includes the steps that firstly, carbonate mineralization bacteria is subjected to optimization culture, bacteria with high urease activity are selected to be prepared into hypopus spores, meanwhile, colloid bacillus hypopus spores are added, then a nutritional substrate, calcium chloride and urea are selected as core material filler, the double-strain spores and medium filler are mixed together, the mixture is subjected to extrusion forming through a pelletizer, and a core material component is formed. Porous diatomite is selected as a wall material, the core material component is adsorbed by the porous diatomite, and the micro-capsule is formed. The microbial capsule is spread in accumulated dust, the microbial capsule wall material is stressed and triggered to releasethe carbonate mineralization bacteria, urea is decomposed by the mineralization bacteria under the in-vivo urease effect, carbonate is generated, the carbonate is continuously chelated with calcium ions, and calcium carbonate is formed. The micro-capsule prepared with the method has a good explosion suppression effect, and environmental pollution can be reduced to a maximum degree.

The invention discloses an ultrafine powder composition for restraining coal dust explosion and a preparation method thereof. The ultrafine powder composition for restraining the coal dust explosion is prepared from the following components in percentage by weight: 37.3%-75.4% of molybdenum trioxide, 15.0%-40.0% of ammonium sulfite, 1.5%-2.5% of cobalt nitrate hexahydrate, 1.5%-2.5% of shell powder, 1.5%-3.0% of silicon dioxide, 3.7%-41.8% of stannous chloride and 1.4%-2.0% of aspartic acid. According to the ultrafine powder composition for restraining the coal dust explosion, good synergisticeffect is achieved between the components, the action of restraining the coal dust explosion is achieved from physics and chemistry aspects, so that the explosion suppression performance of an explosion suppression agent of the ultrafine powder composition for restraining the coal dust explosion is greatly improved, and the ultrafine powder composition for restraining the coal dust explosion hasthe advantages of good powder diffuse performance, easy suspension in air, high thermal decomposition speed, extra high catching free radical capacity, good water repellence performance, high mobilityperformance and high anti-agglomeration performance.

The invention relates to a methanol ammonia oxidation explosion-prevention increase-production method which prevents mixed gas containing methanol vapor, ammonia gas and air from exploding and enhances the productive efficiency of methanol ammonia oxidation. Aiming at defects of low productive efficiency, high cost and more serious security hidden trouble in the prior technics in which the methanol vapor, the ammonia gas and the air are materials and methanol ammonia is catalyzed by fe-mo oxides and is oxidated, the methanol ammonia oxidation explosion-prevention increase-production method which has high productive efficiency, low cost and no easiness to form explosive mixed gas in the above-mentioned method. The invention has the key points that inhibitory explosion gas is added to restrain explosion, the methanol vapor, the ammonia gas and the air which are all combustible gas are heated in a separated way, mixed gas is ensured to flow downwards so that the explosion is not easy to happen in this way, etc. The above-mentioned method ensures the mixed gas materials to be the explosive mixed gas. The methanol concentration and the ammonia concentration are enhanced in the mixed gas, the throughput is greatly enhanced and the production cost is reduced.

The invention relates to a preparation method of a low-carbon mixed gas hydrate explosion inhibitor, and can effectively solve the production problem of high-efficiency environmental-protection explosion-inhibition materials. The method comprises the steps: adding an inorganic salt into a solvent, making the mass content of the inorganic salt be 0.001-0.1 mol/L, and forming a hydration agent; mixing 5-15% of carbon dioxide and 85-95% of a nitrogen and argon mixed gas according to the volume ratio together, and forming an inert mixed gas; and filling the inert mixed gas into the hydration agent, making the pressure reach 4-10 MPa, carrying out a reaction at the temperature of -10 to 8 DEG C for 100-300 min to generate a mixed gas hydrate, crushing the mixed gas hydrate generated from the reaction into hydrate powder with the particle size of less than 1.0 mm at the temperature of -10 DEG C or less, and thus obtaining the product. The preparation method has the advantages of abundant rawmaterials, simple preparation method, easy synthesis and preparation, convenient use, low cost, cleaniness and environmental protection and good explosion suppression effect, is an innovation in theexplosion inhibitor, can effectively weaken energy required for the propagation of explosion pressure waves and hinder the propagation of explosion waves, and has huge economic and social benefits.

The invention relates to an explosion-proof dust suppressant for coal dust and a preparation method thereof. The dust suppressant is prepared from the following raw materials in percentage by mass: 10 to 30 percent of molasses, 0.1 to 0.5 percent of a nonionic surfactant, and 5 to 10 percent of starch-based super absorbent resin (SAP), with the balance being water and a trace pH neutralizer Ca(OH)2. More than 99.5% of the components of the dust suppressant are environment-friendly degradable materials,and the molasses is a byproduct in the sugar industry and is a main material of the dust suppressant, so the dust suppressant has the characteristics of low price, environment friendliness and degradability. The dust suppressant has the functions of wetting, bonding, moisturizing and explosion suppression on coal dust. On-site actual measurement shows that the inhibition rate of the dust suppressant on deposited coal dust in an underground return airway is not lower than 62.86% within three days; and the inhibition rates of the dust suppressant on the explosion indexes of sub-bituminous coal, bituminous coal and anthracite coal dust are 57.45%, 51.47% and 76.98% respectively.