33results about How to "Reduce the possibility of spontaneous combustion" patented technology

The invention provides a method for pyrolysis production of anthracite in a coal powder rotary furnace. The method relates to a coal powder dust removing rotary drying furnace system, an external-heating rotary furnace pyrolysis system with a coal gas circulation function, a rotary cooling passivation system with a heat recovery function, and an oil gas recovering system, wherein the coal powder dust removing rotary drying furnace system is used for heating coal powder to 110 to 280 DEG C and removing coal dust of which the particle size is smaller than 0.2 mm; drying water is recovered and fed to a downstream spiral cooling machine to be used for anthracite cooling and humidification; the coal dust obtained after separation is fed to a coal gas generating system to generate fuel, namely coal gas; after dust removing, coal is sent to a downstream rotary pyrolysis system for pyrolysis; high-temperature anthracite is generated, and cooled; the cooled anthracite is passivated at a middle-low temperature; the passivated anthracite is cooled in the spiral cooling machine; water is sprayed on the cooled passivated anthracite for humidification; the humidified anthracite is sent out; high-temperature oil gas produced in the process enters the oil gas recovering system to obtain coal tar, pyrolyzed water and coal gas. Part of the produced pyrolyzed coal gas returns to the pyrolysis furnace after preheating in a circulating manner, while the other part of the produced pyrolyzed coal gas is sent out.

The invention discloses equipment for preparing nano powder by an electrical explosion method, and belongs to the field of nanomaterial preparation. The equipment aims at solving the problem that the conventional nano powder production equipment has a strict requirement for an insulating structure and an insulating material of a high-voltage part. The equipment comprises a nano powder reaction mechanism, an electrical explosion generation mechanism, a wire feeding mechanism matched with the nano powder reaction mechanism, an air cooler, a first connecting tube, a first insulating tube, a second connecting tube, a second insulating tube and a third connecting tube. According to the equipment, instant high voltage is generated by electrodes, so that materials in an explosion reaction cavity react to generate corresponding nano particles. Due to an improvement of a structure, the working voltage of the equipment is equal to or lower than 25KV, and a high-voltage part has a very low requirement for a high-voltage structure and a withstand voltage material. In addition, raw materials of the equipment are filamentary materials and non-insulators, so that the equipment has the characteristics of wide raw material source and high adaptability, and has good universality for various filamentary non-insulator materials.

The invention provides a method for preparing flaky metal powder by means of a dry ball mill. The method comprises the steps that metal raw material powder and ball milling additives are evenly mixed, a mixture and a steel ball are put in a closed novel roller ball mill for ball milling in proportion, the ball milling temperature is controlled through a cooling water circulation system in the ball milling process, and the ball milling atmosphere in a roller is adjusted through a ball milling atmosphere control system; a closed discharging system is adopted for discharging, inert gas of certain pressure is input, an exhaust fan and the ball mill are started, and ground metal powder in the ball mill is blown and sucked out in a blowing and sucking manner; and the metal powder is put in dispersion equipment again to be dispersed, and is graded by airflow grading equipment to obtain finished products. The invention relates to a device for achieving the method. According to the method, the whole process is high in automation degree, no steel ball transfer exists, and the labor intensity and workloads of workers are greatly reduced. In addition, the sealing performance and the cooling effect are good, no dust pollution exists, the phenomena of powder oxidation and spontaneous combustion in the powder discharging process are avoided, the yield is large, and production efficiency is greatly improved.

The invention discloses a deforming contact type fabric fluff removal device, and belongs to the technical field of clothing processing. A semiconductor refrigeration sheet is heated to 60 DEG C and the heat is transferred to a fluff collecting device. With the expansion of a lifting air bag, the lifting air bag can be promoted to move up until the fluff collecting device comes to contact with fabric. Meanwhile, by intermittently starting and turning off an electromagnet, the fluff collecting device can repeatedly move up and down between a bearing filter screen and the fabric and collect fluff adhering to the surface of the fabric with the help of collecting bore spines and hot melt adhesive layers at the outer ends of fluff collecting balls. When the fluff collecting balls come into contact with the fabric, the fluff collecting balls can squeeze the fabric until the fluff collecting balls become flat balls, and the collection efficiency of the fluff adhering to the surface of the fabric is increased. Meanwhile, traction particles are released, so that the fluff adhering with the traction particles can be adsorbed downward and collected. Moreover, the antistatic property of the fabric can be improved through an antistatic powder layer, and the possibility of the fluff adhering to the fabric again can be reduced.

The invention discloses a coating material used for preventing the air leakage of a laneway, an application method and a special spray gun thereof. The components of the coating material are clay, cement, sodium silicate, glass fiber and water which are mixed, stirred and made into clay cement slurry according to certain proportion and processes. The clay cement slurry is transported to an underground spraying area by a slurry pump through a grouting pipe, and sprayed to a coal roadway wall by the special spray gun to prevent the air leakage of the laneway. The clay cement slurry has strong suspension property, short initial concreting time, certain strength after solidification, rinse-resistance, not easy craze, excellent air partition performance, strong flame-retardant property, ideal effect of preventing the air leakage of the laneway, quick shotcreting process operations, safety and simplicity, is applicable to the spraying to the coal roadway walls of mines with serious hazards, and prevents the air leakage of the laneway so as to reduce the possibility of the occurrence of spontaneous combustion.

The invention specifically relates to a preparation method for a composite inhibitor used for preventing and handling serf-combustion of coal, belonging the technical field of prevention of serf-combustion of coal. The preparation method comprises the following steps: with sodium-based montmorillonite as a raw material, carrying out ultrasonic dispersion and then subjecting the dispersed sodium-based montmorillonite to ion exchange with ferric trichloride; then with cetyl trimethyl ammonium bromide as an intercalator, preparing high-dispersibility modified iron-based montmorillonite; subjecting reduced iron powder, graphite and copper powder to ball milling and alloyage and carrying out physical combination under the action of pressure to form a short-circuit corrosion microbattery together so as to improve an oxygen uptake rate; then loading modified iron-based montmorillonite with magnesium chloride; and then carrying out compounding with carboxymethyl cellulose, ethyl acetate, gelatin and the like so as to obtain the composite inhibitor used for preventing and handling serf-combustion of coal. The composite inhibitor used for preventing and handling serf-combustion of coal can deeply enter the pores of coal, consumes oxygen in a surrounding environment, reduces the temperature of coal due to its water absorption performance, decreases contact between coal and oxygen and lowers the possibility of serf-combustion of coal.

The invention relates to a materialized synergistic coal inhibitor and a preparation method thereof and belongs to the technical field of mines. A sodium polyacrylate salt is used in a water absorbingswelling effect of super absorbent resin, and the physical inhibitor is obtained under the combined action of aqueous resin colloid and rare earth hydrotalcite; due to the high water content and thehigh water retaining performance, the physical inhibitor has the functions of heat absorption and temperature lowering and the effects of blocking oxygen and preventing heat transfer, and suppressionof a coal oxygen reaction is facilitated. At the same time, the affinity of the rare earth hydrotalcite and oxygen is higher than that of magnesium and oxygen, in the process of oxidation and temperature raising, the rare earth hydrotalcite reacts with oxygen and magnesium oxide to generate rare earth oxides and reduce magnesium, and a small amount of aluminum also reacts with oxygen to generate aluminum oxide, so that the density of a barrier layer is increased, the flame retardancy of hydrotalcite-like compounds to polymers is greatly improved, and reduced magnesium, graphite powder and copper powder together constitute a short-circuited corrosion micro-battery for increasing the oxygen absorption rate and synergizing with an antioxidant to capture active radical groups and block a chainoxidation reaction.

The invention discloses hot air vulcanization equipment. The hot air vulcanization equipment comprises a vulcanization tank, and a vulcanization conveying chain is arranged in the vulcanization tank. A vulcanization line feeding inlet combustor and a vulcanization line discharging outlet combustor are arranged on the top of the vulcanization tank. A vulcanization line feeding inlet combustion engine is arranged on one side of the vulcanization line feeding inlet combustor, and a vulcanization line feeding inlet circulating fan is arranged on the other side of the vulcanization line feeding inlet combustor. A vulcanization line feeding inlet air supply channel is arranged below the vulcanization line feeding inlet circulating fan. A vulcanization line air return channel is arranged in the vulcanization tank. A vulcanization line discharging outlet combustion engine is arranged on one side of the vulcanization line discharging outlet combustor, and a vulcanization line discharging outlet circulating fan is arranged on the other side of the vulcanization line discharging outlet combustor. A vulcanization line discharging outlet air supply channel is arranged below the vulcanization line discharging outlet circulating fan. A waste air exhaust fan is arranged in a discharging outlet of the vulcanization tank. The hot air vulcanization equipment has the beneficial effects that the production safety coefficient is high, cost is low, the vulcanization time is short, the vulcanization efficiency is high, and the vulcanization effect is good.

The invention discloses a coal mine connection roadway and a sealing method thereof. The coal mine connection roadway comprises solidified cement layers and a foamed cement layer, wherein the solidified cement layers and the foamed cement layer are vertically arranged in the coal mine connection roadway; the solidified cement layers comprise a first solidified cement layer and a second solidified cement layer; the foamed cement layer is arranged between the first solidified cement layer and the second solidified cement layer; filling holes which are used for filling foamed cement are further formed in the first solidified cement layer. The foamed cement layer is filled by foamed cement materials which are less in heat release after being physically expanded and relatively low in cost, so that the sealing cost of the coal mine connection roadway can be effectively reduced, the sealing efficiency is improved, and the spontaneous combustion possibility of float coal at the top of the connection roadway is reduced; by virtue of the solidified cement layers arranged on two sides of the foamed cement layer, the problem that the foamed cement is low in plasticity is solved, so that the sealing property of the foamed cement layer is improved favorably.

The invention relates to an engine combustion device. The engine combustion device comprises a main combustion chamber, a spark plug, an auxiliary combustion chamber and flame spray holes, wherein initial flames are generated in the auxiliary combustion chamber through discharging of the spark plug, then the flames are generated in the auxiliary combustion chamber and develop rapidly, then multiple jet flames are generated through the plurality of spray holes used for connecting the auxiliary combustion chamber with the main combustion chamber, the multiple jet flames are jetted into the maincombustion chamber at the same time and are equivalent to a high-energy multi-core ignition source of the main combustion chamber, and mixed gas in the main combustion chamber is ignited by multiple large-area flames at the same time. According to the engine combustion device, the combustion speed of the mixed gas is increased, the ignition stability and reliability are improved, and the knockingphenomenon can be effectively restrained.

The invention discloses a multi-layer sandwich-type composite structure and an automobile dash board using the same. The composite structure comprises an upper roof plate, a first sandwich-type body,and an intermediate separating plate which are successively connected. The first sandwich-type body comprises a plurality of first matrixes. A plurality of the first matrixes is arranged on a horizontal plane in periodic array. The first matrix is formed by four first crossed units. The four first crossed units are arranged along a diagonal line of four side faces of a cube, and the four first crossed units are successively connected and a first cavity is surrounded between the four first crossed units. Two neighboring first matrixes are connected through own first crossed units. The compositestructure is capable of greatly improving structural rigidity and strength, bending resistance, anti-penetration performance and different surface collision resistance. The first sandwich-type body is a single-layer lattice structure, and has higher energy absorption capability. In addition, the first cavity has a noise-reducing function.

The invention discloses a positive electrode and a lithium metal solid-state battery with high safety and high cyclicity, and belongs to the field of lithium metal solid-state batteries, the positive electrode of the lithium metal solid-state battery comprises an active substance, the bond energy of elements and oxygen in the active substance is greater than 390 kJ/mol, and the decomposition temperature of the active substance is greater than 250 DEG C. The proper active substance is screened out through the bond energy of the chemical bond and the decomposition temperature to serve as the positive electrode of the lithium metal solid-state battery, the active substance with large binding energy of elements and oxygen is selected, and the oxygen evolution reaction of the active substance in the charging process can be effectively reduced, so that the spontaneous combustion possibility of the lithium metal solid-state battery is reduced; the safety of the lithium metal solid-state battery is greatly improved; meanwhile, the selection of the active substance needs to meet the charging cut-off voltage for stabilizing the electrolyte, and the cycling stability of the battery is ensured.

The invention relates to a preparation method of special oil for emulsion explosives and application of the special oil for the emulsion explosives in the emulsion explosives. The influence of impurity gas and bottom slag in reduced pressure distillation is reduced, the load on reduced pressure distillation equipment is reduced, and the reduced pressure distillation efficiency is improved; the obtained special oil for the emulsion explosive is low in residual amount of sulfur and carbon, basically free water is not contained, the flash point is high, the possibility of spontaneous combustion of an oil product in the steam heating production and transportation process can be effectively reduced, and the safety coefficient is improved; meanwhile, the special oil product for the emulsion explosive does not contain an additive in engine oil blending, so that the influence of the additive on the emulsifying effect of an emulsifier is avoided, and the quality stability of an emulsion matrix is improved; the emulsion explosive prepared from the special oil for the emulsion explosive is high in density, proper in detonation velocity and good in water resistance.