37results about How to "Avoid potential threats" patented technology

The invention relates to a preparation method of an aminated nanofiber membrane with a high specific surface area. The preparation method comprises the following steps of: dissolving two polymer materials with the weight ratio of 1: (0.1-10) or dissolving a polymer material and an inorganic salt into a solvent, dissolving while stirring at the temperature of 20-80 DEG C for 4-96h, and carrying out electrostatic spinning to obtain a composite nanofiber membrane; soaking the composite nanofiber membrane into water, regulating the pH value, soaking at the temperature of 20-95 DEG C for 2-48h, washing and drying to obtain a nanofiber membrane with a porous micro/nano structure and a high specific surface area; and immersing the nanofiber membrane with a porous micro/nano structure and a high specific surface area into water, adding an amination reaction reagent to carry out amination reaction at the temperature of 50-200 DEG C, then, taking out the fiber membrane, washing the fiber membrane to be neutral, and drying the fiber membrane to obtain the aminated nanofiber membrane with a high specific surface area. The product provided by the invention is applied to fields such as adsorption and separation of precious metal ions, heavy metal ions and transition metal ions, chemical probes, sensors, environment monitoring, catalysts, biological medicines and the like.

A method for preparing water soluble chitosan oligosaccharide comprises the following steps: placing preliminarily treated raw material high molecular weight chitosan into a pure water and then placing a soaked mixed solution in a microwave generator so as to carry out tunnel type continuous microwave treatment on the mixed solution; degrading the obtained mixed solution treated by microwaves through using food-grade hydrogen peroxide,; and obtaining low molecular weight chitosan crude product and a filter liquor through nano membrane separation, wherein the filter liquor is fed into an initial soaking step to be continuously used and the chitosan crude product is purified to obtain a chitosan finished product. The method for preparing the water soluble chitosan oligosaccharide, provided by the invention, has the advantages as follows: due to the adoption of the tunnel type continuous microwave treatment, the chitosan soaked in the solution is uniformly radiated, so that the microwave radiation time is reduced and the microwave degradation degree is completer; and as a nano membrane filtering method replaces an alcohol precipitation method in the purifying process, potential threats caused by storage and the use of a great deal of ethanols are avoided and the technical cost is also reduced.

The invention discloses a chuck clamp for loading and unloading a well logging exploring tube radiation source. The chuck clamp comprises a base and a revolving shaft arranged on the base, wherein a rotary chuck gear is arranged at the upper end of the revolving shaft; a rotary stepping motor is meshed with the rotary chuck gear through a transmission conical gear to drive the rotary chuck gear and the revolving shaft to rotate; a tongs holder is arranged on the rotary chuck gear; two opposite tongs are arranged on the upper surface of the tongs holder through slide rails; the two tongs are connected with a clamping stepping motor respectively; a transverse rod bracket is arranged on the base; a pin shaft is arranged on the transverse rod bracket; a transverse rod and the pin shaft rotate synchronously; the transverse rod stepping motor is connected with the pin shaft to drive the pin shaft to rotate. By adopting the chuck clamp, clamping and loosening of the well logging exploring tube can be realized, and a series of actions such as opening of a cabin door, loading and unloading of the radiation source, closing of the cabin door and the like can be finished automatically during clamping, so that potential threat to human health due to current manual operation is avoided. The chuck clamp is simple in mechanism and low in maintenance cost, and works stably and reliably.

The invention provides a preparation device and a preparation method for ultrafine CL-20. The preparation device comprises a main grinding mill, a mixer and a material pump. A main ball mill comprises a grinding cavity with an agitator, and a grinding ball; the grinding ball is arranged in the grinding cavity. An agitator is arranged in the mixer, a discharge outlet and a cyclic feed inlet are formed in the mixer, the discharge outlet of the mixer is connected with a feed inlet of the main ball mill through a pipeline, a discharge outlet of the grinding cavity is connected with the cyclic feed inlet of the mixer by a pipeline, a discharge valve is arranged at a position, close to the grinding cavity, on the pipeline, and the material pump is arranged behind the discharge valve. The preparation method comprises the steps of adding the grinding ball into the grinding cavity of the main ball mill, then inputting the mixed slurry of active ingredient CL-20 and grinding liquid into the grinding cavity, circularly crushing and grinding, then discharging and performing vacuum filtration and drying, to obtain the ultrafine CL-20. The preparation device and the preparation method are simple to operate, high in safety, high in production efficiency, and capable of being widely applied to refinement of various energetic materials.

The invention discloses a method for paving a heating carbon fiber composite electro-thermal material laid under a cement screed-coat. The heating carbon fiber composite electro-thermal material comprises a reflecting layer, a heat-insulation layer, a carbon fiber low-temperature electro-thermal composite material, a waterproof layer, an anti-leakage current layer and the cement screed-coat which are sequentially laid on a cement ground, and the carbon fiber low-temperature electro-thermal composite material is a heating planar heater. The method for paving the heating carbon fiber composite electro-thermal material laid under the cement screed-coat is realized by the aid of the waterproof layer, the carbon fiber low-temperature electro-thermal composite material is waterproof and moisture-proof, the laid anti-leakage current layer can lead leaked current of the carbon fiber low-temperature electro-thermal composite material to directly enter an earth wire, and potential threats of the leaked current are avoided. In addition, the method solves problems that a carbon fiber low-temperature electro-thermal composite material is easy to be corroded and broken during laying in the prior art, and life safety of residents is guaranteed.

The invention discloses a corn steep liquor cereal beverage. Each 100 parts of beverage is composed of the following raw materials in parts by weight: 30-60 parts of raw corn steep liquor and 40-50 parts of water. A processing technology of the corn steep liquor cereal beverage comprises the following steps: mixing sweet corn kernels and purified water in mass ratio of 1:(1-1.5), pouring the mixture into a colloidal mill, performing pulping thrice, and conveying the pulped raw corn steep liquor into a boiler; thoroughly boiling the raw corn steep liquor by a water vapor spray direct-heating steam boiling mode; and blending the raw corn steep liquor with water, fixing volume to obtain mixed liquid, and performing homogenization, degassing, primary high temperature sterilization, filling andsecondary high temperature sterilization to obtain the corn steep liquor cereal beverage finished product. The corn steep liquor cereal beverage prepared by the processing technology has good color,good mouthfeel, good palatability and subtle fragrance of corn, is suitable for long-term storage, has no precipitate or suspended matters in the storage period, and has high stability and high nutritional value of a product.

The invention discloses anti-bacterial and mildewproof PVC granules for a refrigerator door seal. The PVC granules are characterized by comprising the following raw materials in parts by weight: 10-20 parts of PVCSG-5, 20-30 parts of PVCSG-3, 1-2 parts of cellulose acetate butyrate, 0.2-0.4 part of polydimethylsiloxane, 0.2-0.4 part of petroleum sodium sulfonate, 0.2-0.4 part of sodium stearate, 10-20 parts of epoxidized soybean oil, 1-2 parts of palm oil, 1-2 parts of ricinus oil, 0.1-0.2 part of alginic acid propylene glycol ester, 0.1-0.2 part of pentaerythritol stearate, 0.1-0.2 part of sorbitol anhydride monooleate, 30-40 parts of acetyl tributyl citrate and 2-4 parts of performance additive. The PVC granules comprise natural extractives of tea polyphenol, rosmarinic acid, and the like, has anti-bacterial and mildewproof efficacy, is safe and environment-friendly, has favorable light fastness, low temperature resistance, age resistance, fire and flame retardancy and mechanical property, and is high in practicability.

The invention provides a smooth processing device and a smooth processing method of CL-20 grains. The device comprises smooth grinding equipment, and agitating and ageing equipment, wherein a discharging opening of a smooth grinding cavity is connected with a feeding opening of an agitating and ageing cavity through a pipeline; a discharging opening of the agitating and ageing cavity is connected with a feeding opening of the smooth grinding cavity through a pipeline; the position of the pipeline, which is close to the agitating and ageing cavity, is provided with a discharging valve; a material circulating pump is arranged on the pipeline behind the position. Slurry formed by uniformly mixing the raw materials CL-20 and a grinding solution and slurry is conveyed into the smooth processing device to be circularly processed between the smooth grinding cavity and the agitating and ageing cavity; the CL-20 slurry which is sufficiently grinded and aged is discharged and then is filtered in vacuum and dried to finally obtain a CL-20 product with smooth grains. According to the smooth processing device and the smooth processing method disclosed by the invention, methods of wet-method agitating and grinding and solvent dissolving are effectively combined; the device and the method are simple to operate and high in safety; the production efficiency is high; the smooth processing of the CL-20 grains with high mechanical sensitivity can be realized.

The invention relates to a method for quickly mooring an offshore operation helicopter; equipment used in the method comprises a hydraulic power device, a quick mooring device, a prefabricated track,a camera, a feeler lever, a laser target source and control equipment, and the method comprises the following steps: S1, enabling the helicopter to enter a position above an appointed landing area; S2, enabling the hydraulic power device to drive the quick mooring device to move with the helicopter along the prefabricated track; and S3, enabling the quick mooring device to rapidly capture the feeler lever on the helicopter when the helicopter lands and meets the mooring conditions, and finishing the rapid mooring of the offshore operation helicopter. The method can be suitable for both a novelhelicopter serving at the present stage and an old-model helicopter serving at the present stage, and is suitable for severe sea conditions above four stages at the same time; the mooring process ofthe offshore operation helicopter is automatically controlled, so that the operation difficulty of landing the helicopter on a ship is greatly reduced; the helicopter ship landing safety is improved;the method is more reliable and reasonable, and manpower and material resources are saved.

The invention discloses a swill filtrate resourceful treatment system, which comprises a front-section treatment unit, an A2O process, an AB process, a rear-section treatment unit and a resourceful treatment unit. The salt-tolerant composite strains are treated under facultative acid, medium-temperature anaerobic and aerobic alkaline conditions, and generated flocculent sludge is fermented in an anaerobic environment to prepare a decomposed liquid fertilizer, so that resource utilization is achieved. The swill filtrate resourceful treatment system is stable in process and low in operation cost, can effectively solve the potential threat to the body health of people due to improper utilization of the catering swill, utilizes the catering swill to produce the organic fertilizer, turns wasteinto wealth and performs harmless treatment, and creates a new technology taking microbiological treatment as a core for resource utilization of the catering swill in China. The life health of peopleis guaranteed and the environmental pollution is reduced.

The invention discloses a safe glucose moisturizing liquid formula and a preparation process thereof. The formula comprises 2.5-3.5 g of zinc gluconate, 0.1-1.3 g of casein phosphopeptides, 0.3-0.5 mLof natural plant essence, 5-10 mL of smallanthus sonchifolius syrup and 5-10 mL of stevia rebaudianum. According to the invention, the smallanthus sonchifolius syrup and the stevia rebaudianum are added, the smallanthus sonchifolius syrup and the stevia rebaudianum are used for replacing white granulated sugar in a traditional glucose preparation process, the smallanthus sonchifolius syrup and the stevia rebaudianum are respectively a smallanthus sonchifolius extract and a stevia rebaudianum extract, the content of fructo-oligosaccharide in the smallanthus sonchifolius syrup is very high, soluble fibers of the syrup can nourish beneficial bacteria in intestines and stomach, and the stevia rebaudianum can promote insulin sensitivity, reduce oxidation of low-density lipoprotein and preventplaques accumulated in arteries. By adding the natural plant essence, use of artificially synthesized food additives is avoided, potential threats of the food additives to human bodies are avoided, meanwhile, the glucose moisturizing liquid is simple and convenient in preparation process and few in preparation process, the production efficiency and the preparation convenience of the glucose moisturizing liquid are improved, and meanwhile, the production cost of the glucose moisturizing liquid is reduced.