61results about How to "Reduce the possibility of explosion" patented technology

The invention relates to a method for recovering iron from red mud. The method for recovering the iron from the red mud belongs to the technical field of mineral processing, and comprises the steps ofin a suspension roaster, pre-oxidizing a magnetic-separated red mud material in an air atmosphere, and completely transforming spathic iron and brown iron ore in the red mud material into hematite; utilizing self-stored heat of a material obtained through pre-oxidization treatment for reducing the material in a reducing gas atmosphere so as to completely reduce hematite in the material into Fe3O4; re-oxidizing the obtained material in an air atmosphere, and transforming at least part of Fe3O4 in the material into gamma-Fe2O3; and carrying out magnetic separation on the material obtained through the treatment in the steps. The method provided by the invention solves the problems of long calcination time, high temperature, higher reducing gas CO content, loss of valuable elements, high energy consumption and the like in an existing process method for treating the red mud so as to recover fine iron powder.

The invention provides a method for preparing diazonium salt by utilizing a micro-reactor. The method comprises the following steps: firstly, preparing a nitrite solution and an organic amine into oil-water emulsion through a micro-mixer; enabling the oil-water emulsion to react with an introduced acid in a micro-channel to obtain the diazonium salt. The size of the salt formed by the contact of the oil-water emulsion and the acid is very small, and the salt can be consumed rapidly when reacting with nitrous acid, so that a pipeline is not blocked. The method provided by the invention is convenient and rapid to operate and short in reaction time; the defect that the diazonium salt is decomposed, caused by the fact that the temperature is too high, is avoided, and industrial production can be realized.

The invention relates to a mechanical latching mechanism of an explosion-proof switching box. Mechanical latching mechanisms are arranged at an inner side of a left door, an inner side of a right door and an inner side of a box body between the left door and the right door. A rotating shaft, a latching limit disk, a right-door latching lever, and a right-door latching axle seat are arranged at the inner side of the right door. A latching backing plate, an intermediate axle seat, an intermediate pin, a latching board guiding axle and a latching board are arranged at the inner side of the box body. Besides, a left-door latching hammer base is arranged at the inner side of the box body; and a left-door latching hammer is rotatably installed at the left-door latching hammer base. Moreover, a left-door latching base is arranged at the inner side of the left door, wherein the position of the left-door latching base is corresponded to that of the left-door latching hammer base; and an intermediate pin hole that is corresponded to the intermediate pin is arranged on the left-door latching base. According to the invention, latching mechanisms are utilized to control breaking of an isolating switch, so that misoperation of operation personnel and maintenance personnel can be prevented and construction safety can be ensured; and therefore, possibilities of gas and dust explosion in a coal mine can be eliminated, wherein the gas and dust explosion may be caused by the misoperation.

The invention discloses a hydrocarbon refrigerant with intrinsic safety. The hydrocarbon refrigerant is characterized by comprising a low carbon alkane refrigerant and 1%-5% of an explosion suppressant (according to the total mass of the low carbon alkane refrigerant), wherein the low carbon alkane refrigerant (by mass%) is formed by mixing of 60%-100% of propane and 0%-40% of isobutane, the explosion suppressant accounts for 1-5% (according to the total mass of the low carbon alkane refrigerant), and the explosion suppressant (according to the mass% of the explosion suppressant) is any one of or formed by mixing of more than one of tetramethyl lead, tetraethyl lead and pentacarbonyl iron in arbitrary proportion. The hydrocarbon refrigerant provided by the invention not only has high refrigeration efficiency, excellent environmental protection performance, but also has reliable essential safety, effectively eradicates the possibility of hydrocarbon refrigerant explosion, and is applicable to air conditioners, refrigerators and freezers and other refrigeration equipment.

The invention discloses a chemical raw material tank cooling system, which comprises a tank body, the top of the tank body is provided with a feed port, the bottom of the tank body is provided with a bracket, and the top of the tank body is provided with an annular water pipe. The lower end of the annular water pipe is provided with a plurality of spray ports; the top of the support is provided with an annular sump close to the outer wall of the tank, and the bottom of the sump is provided with an outlet pipe, which is connected to the water pump. The water pump is connected to the annular water pipe through the water inlet pipe. The chemical raw material tank cooling system of the present invention has reasonable structural design, fast cooling speed, and high cooling efficiency. The present invention has the advantages of simple structure, convenient use and maintenance, low cost, and high work efficiency.

The present invention discloses a methanol reforming hydrogen production system, which comprises: a reforming reaction unit, which comprises a raw material tank for mixing desalted water and methanol,a reforming reactor communicated with the outlet of the raw material tank, a temperature adjusting unit arranged between the raw material tank and the reforming reactor, a hydrogen purification unitcomprising a palladium membrane purification device arranged at the downstream of the reforming reactor and used for purifying the hydrogen-rich gas after the reforming reaction, and a palladium membrane purification device provided with a purified hydrogen outlet and a residual gas outlet, and a combustion unit provided with a feeding port and a tail gas outlet, wherein the feeding port is connected with the residual gas outlet of the palladium membrane purification device, the tail gas outlet is communicated with the temperature adjusting unit, and the reaction temperature in the reforming reactor is controlled not to exceed the purification temperature interval of the palladium membrane purification device. According to the system, a methanol reforming hydrogen production process can also be provided. The system and process are compact in structure, simple in process, high in energy utilization rate and high in purity of purified hydrogen.

The invention discloses a power battery and a manufacturing method thereof. The method comprises the following process steps of: manufacturing a positive pole piece; manufacturing a negative pole piece; performing die cutting on the positive and negative pole pieces; laminating the positive and negative pole pieces to form an inner core; baking the inner core; assembling and welding; infusing liquid into the cell; ageing the cell; detecting the electrical property; and performing formation and grading capacity so as to finally obtain the power battery. The power battery is simple in process and convenient to manufacture, and by adoption of the laminating process, a 500Ah cell unit can be realized; and the power battery manufactured by the method has the advantages that use is safe, maintenance is easy, inner core capacity is large and the like.

The invention discloses a tunnel poisonous gas detecting device for mine engineering. The tunnel poisonous gas detecting device comprises a vehicle body; crawler-type travelling mechanisms are symmetrically mounted on the two sides of the vehicle body; mounting holes are formed in the two sides of the vehicle body correspondingly and communicate with an explosive-proof cavity of the vehicle body; a main drive shaft and the mounting holes are connected through shaft seats I fixedly mounted in the mounting holes; shaft sleeves are embedded in the shaft seats I; a gas detection sensor is further mounted at the front end of the vehicle body through a lifting column; the gas detection sensor is wirelessly connected with an intrinsically safe type wireless communication module mounted in the explosive-proof cavity through an intrinsically safe type communication system; and an upper lifting column body moves up and down under driving of a stranded wire I. According to the tunnel poisonous gas detecting device, the possibility that explosion is caused by the travelling mechanisms in travelling is effectively avoided, safety performance is improved, meanwhile, and the situation that the gas detection sensor can detect the state and concentration of poisonous gas of different heights is achieved, so that the gas detection sensor effectively avoids top obstacles, and smooth passing of the vehicle body is guaranteed.

The invention discloses a production process and a production system of positive and negative electrode paste of a lithium battery. Positive and negative electrode materials are added to a first-order twin-screw extruder through a conveying device; then the materials are added to a second-order twin-screw extruder so as to be shorn and emulsified, and the consistency processing is performed; and finally, the materials are vacuum-degassed, cooled and shorn to obtain the positive and negative electrode paste. The dispersion degree of lithium ions in the paste is increased, the quality and performance of the battery in the subsequent production is effectively improved, the productivity is increased, and the cost input is reduced.

The invention discloses a synthetic method of N-(1H,1H,2H,2H-perfluorinated octyl) acrylamide. The method includes the steps that 1H,1H,2H,2H-perfluorinated hexyl ethyl iodide, sodium azide and organic solvent are mixed to react, water is added after the reaction is finished, the mixture is still standing and layered, and the organic layer is washed to obtain 1H,1H,2H,2H-perfluorinated octyl azide; under the action of Pd / C catalyst, hydrogen is used for hydrogenation reduction, and 1H,1H,2H,2H-perfluorinated octylamine is obtained through filtration and concentration; 1H,1H,2H,2H-perfluorinated octylamine, triethylamine and acryloyl chloride react in solvent at room temperature, after reaction is finished, the N-(1H,1H,2H,2H-perfluorinated octyl) acrylamide product is obtained through washing, concentration and reduced pressure distillation. The possibility of explosion in the production process is avoided, and the synthetic method has the advantages of being simple in process, safe in production, high in yield and easy to industrialize.

The invention relates to a heat absorption and heat release coupled hydrogen production reactor. The reactor is of a concentric circle type multilayered cylindrical structure and comprises a low-temperature reaction raw material cavity, a high-temperature reaction raw material cavity, a hydrogen production reaction cavity, a combustion reaction cavity, a combustion distribution cavity, a combustion mixing cavity and a buffering cavity in sequence from an outer layer to an inner layer. According to the reactor provided by the invention, high heat transferring efficiency of the reactor and uniform distribution of reaction temperature are ensured by sufficiently utilizing effective matching of an airflow distribution design and different reactions, and reasonable distribution of heat of a system and stable operation of the system are effectively realized. The buffering cavity, the distribution cavity, the mixing cavity and the distribution cavity of raw materials are designed, so that theproblem that the materials in a small-size reaction space are uniformly distributed is solved. A valve group is designed so that the energy efficiency of the hydrogen production reactor is improved.To sum up, the hydrogen production reactor provided by the invention has the appearance characteristics of compactness and small size, has the advantages of high combustion efficiency and heat transferring efficiency, and capability of reducing heat transferring resistance in a heat absorption process and a heat release process, and has a good application prospect.

The invention provides a screw-propelling external-heating type coal dry distillation device. The device comprises a heating chamber, dry distillation chambers, a spiral conveying device, a pyrolysis gas collection device, a bearing supporting base, a material feeding and discharging mechanism and a drive device, wherein the pyrolysis gas collection device is communicated with the dry distillation chambers , the heated part of each dry distillation chamber is located in the heating chamber, the dry distillation chambers are isolated from the heating chamber, the material feeding and discharging mechanism is connected with the dry distillation chambers, the spiral conveying device is arranged in the dry distillation chambers, the end of the spiral conveying device is supported by the bearing supporting base, the drive device is connected to the end of the spiral conveying device, a smoke exhaust channel is arranged in the spiral conveying device, and the heating chamber is communicated with the smoke exhaust channel. A spiral propelling mechanism is adopted for propelling of raw coal, multiple dry distillation chambers are connected in the same sealed heating chamber in parallel, combustion smoke is introduced into a raw material propelling device to realize recycling of heat energy, the raw coal propelling problem in dry distillation of coal is solved, the dry distillation heating efficiency is improved, and the device has the advantages that coal is uniformly heated in the dry distillation process, the heating efficiency is high, the yield of tar is high and the like.

The invention discloses a flexible manipulator for grenade grabbing. The flexible manipulator comprises a power mechanism, a shell, a guide block, discs, reeds and elastic pieces; the power mechanism is mounted in the shell, one end of each reed is driven by the power mechanism and does linear motion in the shell under the action of the guide block, the other end of each reed stretches out of the shell and is fixedly connected with the corresponding elastic piece and the corresponding disc to form one mechanical arm clamping jaw, and the at least three mechanical arm clamping jaws are evenly distributed on the outer circumference of the shell; one end of each elastic piece is fixedly connected with the corresponding reed, and the other end is fixed to the outer circumference of the shell; the rigidity of the reeds is higher than that of the elastic pieces, when the length of the extending parts of the reeds is greater than the length of the elastic pieces from the end surface to the tail end of the shell, the reeds are opened outwards under the limiting action of the elastic pieces; when the length of the extending parts of the reeds is smaller than the length of the elastic pieces from the end surface to the tail end of the shell, the elastic pieces are bent inwards under the pulling force of the reeds, and meanwhile, the deformation directions of the reeds are opposite to those of the elastic pieces through the elastic force generated by deformation of the reeds to clamp a grenade. According to the flexible manipulator, the safety and reliability of clamping the grenade can be improved.

The invention relates to pressing equipment adopted in a method for making a molded part and a raw material mixture thereof. A moldable mixture does not contain formaldehyde, a hardening agent, an impact-resistant modifier or a co-solvent, and has the characteristics of low water content and the like; the molded part produced through the method for making the molded part has high stretching viscosity and uniform density, and thermal treatment and fumigation are not required; through adoption of the molded part pressing equipment, automatic implementation of the method is realized, and labor force is reduced; and the pressing equipment has the characteristics of high speed and the like.

The invention relates to a natural ventilation system for a coal mine underground and a natural ventilation method for the coal mine underground. The natural ventilation system comprises a main air return roadway, a main return air duct, an exhausting chimney, and a return air duct, wherein the return air duct is synchronously extended into a mining area along mining and tunneling actions, gas generated in a tunneling process is extracted and conveyed into the main coal mine air return roadway or the main return air duct through the suction inlet of the return air duct before being diffused, and finally discharged through the exhausting chimney; a return air connection roadway or a return air connection pipeline is arranged on the innermost end of the mining area and the return air pipeline in a first mining area is connected with other subsequent mining areas, or the first mining area is connected with the other subsequent mining areas. According to the system and the method, the problem of gas accumulation in the mining area and the mining empty area is completely solved, so that gas in each place of the mining areas can enter into the main return air roadway or the main return air duct in the first time and cannot be retained in the production area and accumulated in the mining empty area, gas explosion is completely eradicated, the energy is saved and the hole is in a constant temperature status such as warmer winter and cooler summer.

The invention discloses an explosion-proof transport vehicle, which includes straight rails, curved rails, an independent moving system, a rail moving system, a spanning system, a fixing system, a base system, and a loading system; The tool can not only carry out high-speed transfer operations along the established path, but also carry out free-moving transportation operations in complex terrains; through the installation of metal conduits in the independent moving system, even if the carrier encounters strong external factors such as lightning strikes in the work site At the same time, by storing water in the box of the loading system and setting a flip door above the box, it can play a role in heat insulation and cooling, so that the vehicle will not have accidents due to a sharp rise in temperature after a long period of exposure Accident; by setting the wave plate and the baffle rod in the loading system, the slippage of coal particles is limited to the greatest extent, the filling rate between coal materials can be improved, and the possibility of friction sparks caused by materials can also be reduced.