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

The invention relates to the technical field of adsorption materials, and specifically discloses the application of an ionic liquid in the preparation of modified activated carbon, the modified activated carbon and a preparation method thereof. The preparation method comprises the following steps: mixing the ionic liquid and activated carbon, treating at a constant temperature of 100-120° C. for 24-36 hours, and obtaining modified activated carbon through separation treatment. The modified activated carbon provided by the present invention increases the saturated adsorption capacity of organic waste gas by about 120%, increases the spontaneous ignition point by about 30°C, improves the adsorption efficiency of the modified activated carbon, increases the spontaneous ignition point, and reduces the possibility of spontaneous combustion.

The invention discloses an anti-extinguishing system and a control method for gas circulation utilization in a goaf, including a gas transmission pipeline, a gas return pipeline, a flame retardant system, a wind flow blocking system and a gas generating device. The gas transmission pipeline includes a gas transmission main pipe and a gas transmission pipe The air branch pipe and the air return pipeline include the suction main pipe and the vertical column branch pipe, in which the gas transmission main pipe and the suction main pipe are connected by a multi-section straight pipe through a three-way valve; the flame retardant system includes a flame retardant tank, a flame retardant pipeline, The water injection pipe and the injection head are connected with a number of injection heads parallel to the flame retardant pipeline; the air flow blocking system is composed of a hydraulic support and a coal gangue pile whose gaps are sealed by foam; the gas generating device includes nitrogen gas. Production unit, nitrogen work station and gas recovery unit, this part is placed in the roadway. The whole system has simple structure, coherent working process and high efficiency, which can greatly reduce the occurrence rate of spontaneous combustion fire in the goaf.

The invention relates to a method for improving the recovery rate of fully mechanized top coal carving, comprising the following steps: arranging boreholes in open-off cut and upper and lower drifts before the production of a working surface and performing dynamical pressure water injection in the cut holes and the boreholes of the upper and lower drifts according to water injection pressure of more than 200MPa, wherein the cut boreholes are parallelly arranged along the direction of the open-off cut, the hole distance between the cut boreholes is smaller than or equal to 10m, the hole depth is larger than or equal to 22m, the included angle between each cut borehole and a top roof is 75-80 degrees, and the drift boreholes are arranged in the upper and lower drifts being away from front of the coal wall of the working surface by 5m; a vertical drift in the upper and lower drifts is provided with a group of boreholes respectively from bottom coal to top coal, the hole distance of each group of boreholes is smaller than or equal to 2m, the hole depth is larger than or equal to 92m, the distance from the orifice of each drift borehole to a bottom plate is larger than 1m, and the included angle between each drift borehole and the top roof is 5-9 degrees.

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 rotary furnace low-order powdered coal pyrolysis upgrading method with coal gas circulation. The rotary furnace low-order powdered coal pyrolysis upgrading method comprises the following steps: heating and drying raw material powdered coal with the granularity less than or equal to 30mm to be 110-280 DEG C in a low-order powdered coal rotary drying system with dust collection, and removing 85% of coal dust with the granularity less than 0.5mm in the powdered coal; feeding the dried coal with the granularity of 0.5-30mm to a downstream rotary pyrolysis system to react at 500-700 DEG C so as to generate upgraded coal and a high-temperature oil gas; feeding the high-temperature upgraded coal to a rotary cooling passivating furnace for primary cooling and medium / low temperature passivation, further cooling by using a spiral cooling machine, spraying water, and discharging out the product; feeding the high-temperature oil gas into an oil gas recycling system, and performing temperature reduction separation, thereby obtaining coal tar, pyrolysis water and pyrolysis coal gas; preheating a part of the pyrolysis coal gas, circulating back to the pyrolysis furnace, and discharging out the rest part of the pyrolysis coal gas.

The invention discloses a transformer and belongs to the technical field of transformers. A transformer, comprising an installation box, further comprising: an electrical assembly detachably connected to the installation box, wherein the electrical assembly includes a casing, and a heat sink is arranged in the casing, and a heat sink is fixedly connected to the heat sink. Windings, the top of the housing is provided with terminals, the terminals are electrically connected to the windings; the shunt box fixedly connected to the inner wall of the housing is used to spray dry powder to the windings; the shunt box arranged in the installation box Ring; the connecting block arranged in the installation box; the present invention automatically uses dry powder to extinguish the fire of the electrical components when they spontaneously ignite, preventing the electrical components from continuing to burn and causing a fire, and by collecting rainwater, the rainwater is used to reduce the temperature inside the installation box , so as to reduce the possibility of spontaneous combustion of electrical components, and the water in the water chamber can absorb the vibration waves generated by the electrical components, thereby reducing noise.

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 an automatic slag discharge collection system for coal mill stone coal, which includes a coal drop hopper, and an automatic collection structure is arranged on the coal drop hopper; the automatic collection structure mainly includes: a first movable baffle plate, a coal drop hopper tube, the second movable baffle, blowing air duct, cold air blowing structure, collection box and several shower heads with the same structure; the first movable baffle is movably installed at one end of the coal hopper, Installed at one end of the coal drop hopper, the second movable baffle is movably installed at one end of the coal drop pipe, the blowing air duct is installed at one end of the coal drop pipe, and the cold air blowing structure is installed at one end of the blowing air duct. The collection box is installed at the other end of the blowing air duct. The present invention relates to the technical field of pebble coal collection devices. It has simple structure, convenient installation and use, extremely low maintenance cost and simple maintenance, low failure rate, and reduces the possibility of spontaneous combustion of pebble coal. Ensure the safe operation of the milling system.

The invention provides a method for dry-type ball milling to prepare flake metal powder, comprising: uniformly mixing metal raw material powder and ball milling aids, and putting steel balls in proportion to ball milling in a new type of closed roller ball mill, and the ball milling process is circulated through cooling water The temperature of the ball mill is controlled by the system, and the ball mill atmosphere in the cylinder is adjusted by the ball mill atmosphere control system; the discharge adopts a closed discharge system, and a certain pressure of inert gas is introduced to start the exhaust fan and the ball mill, and the metal powder ground in the ball mill is blown and sucked. Blow and suck it out; put it into the dispersing equipment to disperse, and then classify it through the airflow grading equipment to get the finished product. And a device for realizing the above method. The method of the present invention has a high degree of automation in the whole process, no steel ball turnover, greatly reduces the labor intensity and workload of workers, and in addition has good sealing and cooling effects, no dust pollution, avoids the phenomenon of spontaneous combustion of powder oxidation in the process of powder discharge, and has a high yield Large, the production efficiency is greatly improved.