6results about How to "Safe and efficient production" patented technology

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

The application discloses a kind of aluminum electrolytic cell series ground fault detection method and system based on multi-data fusion, the method of the present application includes to aluminum electrolytic cell series Load AC excitation signal;Synchronous acquisition aluminum electrolytic cell series DC voltage data, AC voltage data and bus current data;Respectively based on DC voltage data, AC voltage data and bus current data carry out aluminum electrolytic cell series ground fault diagnosis to obtain corresponding diagnostic results;Three kinds of diagnostic results are fused using Dempster-Shafer data fusion method to obtain the final ground fault detection result of aluminum electrolytic cell series.The present application aims to improve the reliability of electrolytic cell series insulation diagnosis, reduce the uncertainty of monitoring results, correctly warn electrolytic cell series ground fault, and accurately locate the electrolytic cell with ground fault.

The application discloses a rock burst advanced tendency early warning method for an open working face, and is specifically implemented according to the following steps: step 1, determining a warning threshold and selecting a working face sample; step 2, determining a warning threshold sample area, a yellow warning line and a red warning line for the selected working face sample; step 3, determining a dynamic period increment of an advanced area of the working face; step 4, determining a static fixed increment coefficient of the advanced area of the working face; step 5, estimating a microseismic event cumulative energy curve of the advanced area under different mining speeds in the next stage of the working face according to steps 2-4; and step 6, determining whether to take early warning treatment according to the microseismic event cumulative energy curve of step 5. The working face advanced tendency early warning method can be used for targeted analysis of a rock burst risk key area of the working face, estimation of a rock burst risk degree of the working face in the next stage, and has great significance for guiding the working face to take treatment measures in advance and to take a reasonable mining speed, and is favorable for safe and efficient production of the working face.

A mining dust remover air duct used in cooperation with tunneling equipment comprises a rigid dust suction air duct, and a plurality of detachable supporting frames are installed at the bottom of the rigid dust suction air duct. The mining dust remover air duct used in cooperation with the tunneling equipment has the advantages that the rigid dust suction air duct is connected with the tunneling equipment through the supporting frame, the air supply pipe system is installed on the rigid dust suction air duct, the air supply pipe system and the dust suction air duct are integrated, and therefore the dust suction air duct can be used for dust removal. Cooperative movement of dust removal and ventilation functions is achieved, in the advancing process of the tunneling equipment, the air supply pipe system and the dust suction air duct can synchronously move along with the tunneling equipment without shutdown adjustment, frequent shutdown caused by independent movement of a traditional split type air duct and an air supply pipeline is avoided, the labor intensity of workers is effectively reduced, and the working efficiency is improved. And meanwhile, the dust falling efficiency of the tunneling head-on is effectively ensured, and great significance is achieved for achieving safe and efficient production.

The present application provides an aldehyde liquid phase hydrogenation reaction system, which is provided with a novel liquid phase hydrogenation reactor. The reactor is provided with upper and lower column catalyst bed layers, and the outer wall is provided with baffles; the bed support structure and the redistributor are arranged between the upper and lower column catalyst bed layers; the support porcelain ball and the wire mesh layer are arranged below the lower column catalyst bed layer; the first fresh hydrogen inlet is arranged at the top of the cylinder, and the liquid phase inlet is arranged below the first fresh hydrogen inlet; the second fresh hydrogen inlet is arranged above the redistributor; the boiler water inlet and the water vapor mixed outlet are arranged in the upper and lower column catalyst bed layers, respectively; the bottom of the cylinder is provided with a liquid phase outlet; the gas phase outlet is arranged below the lower column catalyst bed layer; the fresh hydrogen is input through the first fresh hydrogen inlet and the second fresh hydrogen inlet; the water vapor mixed outlet is connected with the steam drum; the liquid phase outlet and the gas phase outlet are connected with the separation tank, and the top of the separation tank is connected with the vent gas cooler. The present application avoids the problem of temperature rising, produces high-grade steam as by-product, and saves energy and reduces consumption.

The invention belongs to the technical field of organic synthesis, and particularly relates to an aryl formyl pyrazole compound and a synthesis method thereof. The synthesis method comprises the following steps: uniformly dispersing an aryl formic acid compound as shown in a formula 1 and a pyrazole alcohol compound as shown in a formula 2 in an organic solvent, stirring at room temperature, and sequentially adding an organic alkali and an onium salt condensing agent, so that the aryl formyl pyrazole compound can be efficiently prepared, the yield of the target compound is as high as 93%, and the aryl formyl pyrazole compound can be prepared by modifying hydroxyl on a pyrazole ring. A prodrug of the drug molecule or a compound with potential biological activity is obtained; according to the method disclosed by the invention, esterification and rearrangement two-step reaction are completed by a one-pot method under a one-step condensation condition for the first time, reaction steps are effectively shortened, and the preparation cost is remarkably reduced while the atom economy is greatly improved. Meanwhile, the method effectively overcomes the harsh reaction conditions of using highly toxic pipe products such as acetone cyanohydrin and trimethylsilyl cyanide in the existing rearrangement technology, and overcomes the technical defects of complex substrate synthesis, limited range and the like.