17results about How to "Safe and efficient production" patented technology

The invention discloses a method for synergistically promoting safe and efficient production of farmland by activated sludge-microbial inoculum, which comprises the following steps: mixing activated sludge and sawdust, fermenting at 50-60 DEG C for 13-15 days, sieving to remove incompletely decomposed large-particle substances after fermentation to obtain a uniform and fine compost product, mixing the compost product with a soil sample to obtain a culture medium, and culturing the culture medium in the soil sample to obtain the safe and efficient production of the farmland. The method comprises the following steps: planting crops on a culture medium, and inoculating a bacillus marissii bacterial solution into the culture medium in the growth process of the crops. According to the method, Rafs-SNRK2 signal regulation and control channels in plants are induced through the bacillus Yellow Sea, accumulation of heavy metals in the plants is effectively prevented and controlled, crop growth is promoted, use of pesticides and chemical fertilizers is reduced, and the technology is expected to provide a new method for resource utilization of activated sludge and safe and efficient production research of farmlands.

The invention discloses a coal rock quality near-bit while-drilling evaluation device adaptive to a mining directional drilling machine, which comprises a PDC (Polycrystalline Diamond Compact) bit, a near-bit while-drilling measurement nipple, a screw drill, a while-drilling sound wave detector, a track measurement exploring tube and a central through cable drill rod which are connected in sequence, the near-bit measurement-while-drilling nipple comprises a cylinder, a first internal thread connecting part, a first external thread connecting part and a detection module arranged on the cylinder, and the detection module comprises a rotating speed sensor, a positive pressure strain gauge and a rotating torque strain gauge; the method comprises the following steps: 1, mounting the coal rock quality near-bit while-drilling evaluation device; 2, drilling and data acquisition of a to-be-detected coal seam; and 3, obtaining coal rock quality evaluation indexes of the coal seam to be detected. The method is reasonable in design, the near-bit while-drilling data are processed to obtain the corrected rock mass basic quality index, and the coal rock mass quality grade near-bit while-drilling quantitative judgment is performed according to the corrected rock mass basic quality index.

The invention discloses a drill string dynamic parameter measuring tool and a ground-bottom rock breaking working condition analysis method, and the method comprises the steps: measuring underground dynamic parameters, and storing the data; transmitting the underground dynamic parameter data to a client, and establishing an underground dynamic parameter database; on the basis of comparison and analysis of the underground dynamic parameters and preset ground parameters, predicting and monitoring the motion state of an underground drill column; and predicting the rock breaking working condition through the motion state of the underground drill column. Compared with the prior art, the drilling rock breaking process has high uncertainty and opaqueness, the underground drill column motion state and the underground rock breaking working condition cannot be visually monitored, the underground rock breaking working condition can be analyzed and monitored by analyzing the dynamic parameter change of the drill column, the occurrence probability of underground complex accidents is reduced, and therefore safe and efficient production is achieved.

The invention relates to the technical field of refractory materials, and provides a refractory silicon carbide castable which comprises the following components in parts by weight: 30-50 parts of silicon carbide particles, 10-20 parts of silicon carbide fine powder, 5-15 parts of corundum fine powder, 5-10 parts of calcium aluminate cement, 3-8 parts of silica powder, 0.5-2 parts of a dispersing agent, 0.5-2 parts of a water reducing agent, 0.1-0.5 part of explosion-proof fibers and 5-10 parts of water. Through matching of silicon carbide, corundum fine powder, calcium aluminate cement and the like with specific raw material granularity and components, the castable is stable in structure at high temperature, high in refractoriness, capable of effectively resisting erosion, good in mechanical property, capable of keeping stable and reliable under different working conditions, suitable for various high-temperature industrial kilns, safe and efficient in production and suitable for industrial production. By adopting a step-by-step mixing mode of dry mixing and wet mixing, the dispersing and water reducing effects can be better exerted, so that the performance of the castable is more stable and reliable, and the production efficiency and the stability of the product quality are improved.

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 utility model discloses a self-moving type sealing device for isolating poisonous and harmful gas in a goaf, which belongs to the technical field of mineral engineering and comprises a moving track, a first sealing component and a second sealing component are respectively arranged on the moving track, the first sealing component and the second sealing component are identical in structure, and the first sealing component and the second sealing component are arranged on the moving track. The first sealing assembly and the second sealing assembly are connected through a connecting assembly. The first sealing assembly comprises a blocking door, a telescopic body is connected to the interior of the blocking door, and a blocking component is arranged in the telescopic body. By adopting the self-moving sealing device for isolating the poisonous and harmful gas in the goaf, the poisonous and harmful gas in the goaf can be prevented from gushing out to a mine production system, the length of a mine ventilation route is reduced, the goaf sealing process is further simplified, the long-term labor intensity of workers is reduced, and the economic benefit of a coal mine is improved; and coal mine production is safe and efficient.

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 present invention relates to the field of textile machinery technology, in particular to an adjustable cloth pressing mechanism for a cloth cutting machine, comprising an external main frame, an electric cutting mechanism installed on the inner side of the external main frame, and an electric push rod. The adjustable cloth pressing mechanism for a cloth cutting machine of the present invention is composed of an electrically controlled flip telescopic positioning plate installed on both sides of the electric cutting mechanism and a bottom fixed support plate, and the internal flip squeezing plate is driven by the electric push rod to telescope inside the external flip frame and the middle flip frame, so that the cloth surface is pressed and flattened while the cloth is pressed and fixed, thereby improving the stability and cutting accuracy of the cloth during cutting; by flipping and adjusting the flip support plate, the stability of the cloth during transportation can be improved, and the cloth is automatically conveyed to the transmission roller after cutting is completed, avoiding manual operation, and making production safer and more efficient; the connection end of the flip telescopic positioning plate has better firmness and stability during the flipping process, avoiding displacement of the cloth due to flat pushing.

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 discloses a coal mine roadway turning and adjusting method, which relates to the field of coal mining, and comprises the following steps: at a turning point of a roadway to be excavated, retreating an integrated excavator to a specified position, and adjusting a cutting head of the integrated excavator to be close to the left side; the support of the right side of the roadway at the turning point is relieved, the right side is cut and brushed in an expanding mode through a fully-mechanized coal winning machine, and the width of the roadway is gradually brushed to 4.4 m in an expanding mode; the roadway is further expanded and brushed according to the curvature radius of 6 m until the maximum width is 11.5 m, and meanwhile, the position of the left side is inwards adjusted to 4.0 m through multiple times of cutting and trimming. According to the method, the construction process of the turning section is optimized through the steps of cutting and expanding brushing of the roadheader at the turning point of the roadway in combination with multiple times of retreating and position adjustment, and the roadway tunneling efficiency can be remarkably improved.

The invention relates to the technical field of filling materials, and discloses a mine filling inorganic low-temperature foaming material and a preparation method thereof.The mine filling inorganic low-temperature foaming material is prepared from a material A, a material B and a material C, the material A is composed of 600-800 parts of inorganic acid, 200-300 parts of lime, 50-150 parts of triethanolamine and 10-20 parts of coagulant, and the material A plays a role in curing; the material B is a foaming material and is obtained by mixing 90-100 parts by weight of resin, 6-10 parts by weight of a flame retardant, 5-15 parts by weight of a foaming agent, 1-5 parts by weight of a stabilizer, 1-15 parts by weight of a cosolvent, 2-16 parts by weight of an antistatic agent and 10-30 parts by weight of a plasticizer and stirring and reacting at 30-50 DEG C for 0.5-2 hours. The filling material is used for filling holes, cracks and air leakage channels of coal rocks in a top-coal-caving area and plugging air leakage of a working face and a goaf, and gas in the goaf can be prevented from gushing out.

The invention relates to a system and a method for recovering waste gas generated in production of carbon nanotubes by a vapor deposition method. The waste gas recovery system is technically characterized by comprising a waste gas pipeline, a waste gas cooling device, a waste gas solid separation device, a waste gas static separator, a gas pressurization device, a gas decompression device, a hydrogen membrane separation device, a hydrocarbon gas and nitrogen membrane separation device and a multi-type sensor for collecting the working condition of the recovery system, the equipment controller is used for controlling equipment on the recovery system; the waste gas recovery control server controls the pressure on the two sides of a separation membrane of the hydrogen membrane separation device and the pressure on the two sides of a separation membrane of the hydrocarbon gas and nitrogen membrane separation device to achieve the gas separation function, the pressure on high-risk gas is reduced, and the raw material hydrocarbon gas, the working gas nitrogen and the derivative gas hydrogen in the waste gas can be separated out and reused. And the requirements of energy conservation, emission reduction and efficiency improvement on the premise of safe production are met.

The utility model discloses a detection and alarm device for separation of a casting hydraulic platform and a mold disc base, which comprises a mounting plate, a hole is formed in the center of the mounting plate, a distance sensor is mounted in the hole, and the distance sensor is used for detecting the distance between the casting hydraulic platform and the mold disc base so as to determine whether the casting hydraulic platform and the mold disc base are in a separation state or not; the connecting bolts are arranged at equal angles, penetrate through the edge of the mounting plate and are in threaded connection with the mounting plate; the locking nut is arranged on the connecting bolt in a screwing and sleeving manner so as to limit the connecting bolt; by means of the design, automatic alarming can be achieved through non-operation interlocking detection in the production process, five-linkage automatic starting and casting stopping of a casting machine are achieved while alarming signals are sent out, and therefore accident risks are reduced, the coefficient of safety production is increased, and safe and efficient production is achieved; and the problem of inconvenient disassembly and assembly caused by rusting is solved.

The utility model relates to a kind of straight head machine work roll on-line polishing tool, belong to metallurgical industry continuous pickling line or cold rolling production line technical field.The technical scheme is: containing telescopic handle (5) and polishing head (6), the polishing head (6) contains polishing oil stone (1), support spring (2), fixed frame (3) and wooden gasket (4), fixed frame (3) is fixed on wooden gasket (4), several support springs (2) are equipped in fixed frame (3), and polishing oil stone (1) is set on support spring (2);The lower end of several support springs (2) in fixed frame (3) is fixed on wooden gasket (4), and polishing oil stone (1) is placed on support spring (2).The utility model has the beneficial effects that when mill scale, dust etc. Enter straight head machine pollution work roll, cause the small protrusion of work roll, can realize on-line polishing, avoid to cause the mark of steel strip, reduce processing time, promote safe and efficient production.

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.