40results about How to "Strong operational safety" patented technology

The invention discloses a synthetic method of 2,5-furan dimethanol and an etherified product of 2,5-furan dimethanol and relates to 2,5-furan dimethanol. The synthetic method comprises the following steps of: adding organic alcohol into a reaction substrate; putting the obtained mixture as a raw material in a high pressure reaction kettle; adding a certain amount of a molecular sieve supported catalyst; and performing a heating reaction to obtain 2,5-furan dimethanol and the etherified product of 2,5-furan dimethanol. By using alcohol as a hydrogen donor and a reaction substrate, no external hydrogen source does not needed. By adjusting the acid-base property of a catalyst through an active metal component, 2,5-furan dimethanol can be obtained by selectively catalyzing transfer hydrogenation of 5-hydroxymethylfurfural or 2,5-dialkoxyl methyl furan is obtained by further etherification. The catalyst is cheap and easily available and good in repeatability, no excessively hydrogenated product exists, and the whole reaction is hydrogenated in a hydrogen environment, and the synthetic method has relatively strong operating safety of industrial production and very good industrial application potential.

The present invention provides a batch pneumatic testing device for contact type smart cards, comprising an upper computer running a batch downloading testing software, a test instrument mainboard, an interface adapter board, a test fixture, and a power supply starting switch; wherein the test instrument mainboard is in communication connection with the upper computer, and is also in communication connection with the interface adapter board. The batch pneumatic testing device of the present invention can simultaneously achieve downloading test of a plurality of contact type smart cards, and is simple and convenient in testing, high in testing efficiency, and accurate in testing result.

The invention relates to the field of biotechnology and particularly relates to a method for reducing the content of cyanides in cassava residues. The method is characterized by comprising the following steps: mixing saccharomycetes and actinomucor elegans according to a volume ratio of (1-5):(1-3) to obtain a mixed bacterial solution, then mixing 10-20ml of the mixed bacterial solution and 180-250g of cassava residues, and carrying out fermentation at 25-31 DEG C for 48-96h. The method is simple and easy. By adopting a micro-biological degradation mode, the content of hydrocyanic acid can be greatly reduced, the cyanide degradation rate is more than 80%, the safety of the cassava residues serving as feed is improved, and the hydrocyanic acid can be decomposed and converted to non-toxic organic matters to serve as nutrients of the feed, thereby increasing the economic benefits of safe utilization of the cassava residues.

The invention discloses an inner hole welding protection tool and an inner hole welding method, and relates to the field of inner hole welding of a pipe-shell type heat exchanger pipe joint, in particular to the inner hole welding protection tool and the inner hole welding method. The inner hole welding protection tool comprises an upper clamp body and a lower clamp body, wherein the upper clamp body and the lower clamp body are connected to form a hollow cylindrical clamp body; the upper clamp body and the lower clamp body are connected through a sealing structure; the outer peripheral surface of the lower clamp body is fixedly connected with a fixing base; the upper clamp body is connected with a pressing rod; and the end, away from the upper clamp body, of the pressing rod is connectedwith a sleeve. The tool is reliable to use. By using the inner hole welding protection tool on the surface of a weld joint, the situations that the pipe joint is not completely welded and the outer surface of the weld joint is oxidized can be avoided. During welding, high-purity argon or other protective gases are introduced into the inner hole welding protection tool, and a protective gas atmosphere is formed outside the weld joint through a channel formed by the upper clamp body and the lower clamp body, so that the surface of the weld joint is smooth. An operator only needs to conduct installation and gas introduction, and the operation safety and the practicability are high.

The invention discloses a method for reducing acrylamide in starch-type fried food. The method comprises the following steps: firstly, immersing a starch-type food raw material in a natural extract aqueous solution for a period of time at a given temperature; removing water on the surface of the processed food raw material, and frying the food raw material at a certain vacuum degree; cooling the fried food to a room temperature, encapsulating the cooled fried food by using a polyethylene composite packaging bag filled with nitrogen with a volume percentage content of 70 to 99.9 percent, the packaged fried food is radiated by adopting electron beams / X rays generated by an electronic accelerator with an energy of 5 to 10 MeV, a beam current of 0.3 to 20 mA and beam power of 10 to 20 kW, and the radiation dosage is controlled at 1 to 5 kGy. When in work, the ambient humidity is limited at less than or equal to 60 percent. The method has the characteristics that the pretreatment of natural products is used to inhibit the radiation-induced odor, and the low-temperature vacuum frying is used to control a generation amount of the acrylamide, so that the content of the acrylamide in the starch-type fried food can be significantly reduced by utilizing low-dosage radiation, the nutritional quality and sensory quality of the food can be maintained, the sterilization can be realized, the sanitation is improved, and the food quality and security can be ensured.

The invention discloses a precise positioning method for a stiffening plate of an H-shaped steel component. The precise positioning method comprises the following steps: 1) measuring, marking and carrying out region division; 2) installing a guide slide rail; (3) a movable limiting mechanism is installed, adjusted and positioned; 4) mounting an auxiliary fixing device; and (5) the connecting plates and the H-shaped steel beams are welded and fixed in sequence. The device is simple and reasonable in structural design, high in practicability, clear in principle and simple and convenient to adjust and operate, the H-shaped steel beam is segmented and divided in the length direction according to the length of the guide sliding rail and the actual length of the H-shaped steel beam, and step-by-step welding and positioning of the connecting plate are conducted with the divided segments as units; according to the auxiliary device for welding and fixing the connecting plates, the connecting plates at one division section are welded and installed firstly, after all the connecting plates in the division section are welded and installed, the whole auxiliary device is moved to the next division section, welding and positioning of the connecting plates at other division sections are conducted till welding and fixing of all the connecting plates are completed, the whole installation process is reasonable and scientific, and actual operation is convenient.

The invention discloses a preparation method of a clay anti-sensitivity solid polycarboxylate superplasticizer. The solid polycarboxylate superplasticizer is prepared by subjecting an unsaturated polyoxyethylene ether macromonomer a, an unsaturated carboxylic acid monomer b, an unsaturated alkyl ester monomer c and an unsaturated cationic monomer d according to a molar ratio of 1:(3.5-6.0):(0.5-1.0):(0.1-0.5) to solvent-free bulk polymerization under the action of an organic initiator and a chain transfer agent, and slicing by a condensation slicer. No volatile solvent is used in the production process; the process is simple, the prepared clay anti-sensitivity solid polycarboxylate superplasticizer has the advantages of being high in purity, good in solubility, low in clay sensitivity andthe like, the adverse effect of clay components in high-mud-content sandstone aggregate on the performance of the polycarboxylate superplasticizer is effectively reduced, meanwhile, due to the solid characteristic of the polycarboxylate superplasticizer, the packaging and transportation cost is greatly reduced, and a good application prospect is achieved.

The invention discloses a method for lowering imidacloprid and acetamiprid residue in tobacco, which comprises the following steps: packaging tobacco with a carton, wherein the accumulation thickness is 26-72cm, and the accumulation density is 0.20-0.34g / cm<3>; putting the tobacco cartons on a conveying device at a conveying speed being 0.02-0.3m / s; irradiating the tobacco cartons by an electronic beam or X ray generated by an electron accelerator, wherein the energy of the electron accelerator is 5-10MeV, the beam is 0.3-20mA, the beam power is 10-20kW, the maximum scanning width is 100cm, the scanning frequency is 5-15Hz, the radiation amount is 1-10kGy, and the working temperature is set to be 5-35DEG C; causing the tobacco cartons to pass through a scanning window of the electron accelerator to be irradiated, wherein the center of each tobacco carton is far away from the scanning window of the electron accelerator for 40-60cm during irradiation, and the environment humidity during working is limited to be less than or equal to 60%.

The invention belongs to the technical field of insulators, and in particular, relates to an automatic porcelain wiping device for windproof porcelain insulators. The automatic porcelain wiping devicefor the windproof porcelain insulators comprises a console, a rotating table, a fixed rod, a wiping head and a driving motor; the rotating table is arranged on the console, and is connected with theconsole through a rotating shaft; the rotating table is used for placing the windproof porcelain insulators; the fixed rod is arranged on the console; the wiping head is arranged on the side surface of the fixed rod; and the rotating shaft is connected with an output shaft of the driving motor. The windproof porcelain insulators can be placed on the rotating table; the driving motor drives the rotating shaft to rotate; the rotating shaft is rotated to drive the windproof porcelain insulators on the rotating table to rotate; the wiping head on the side surface of the fixed rod can be contactedwith the windproof porcelain insulators; in the rotating process of the windproof porcelain insulators, porcelain is wiped, that is, the surfaces are cleaned; and the device is simple in structure andconvenient to use, improves the working efficiency, reduces the labor intensity, and achieves high operation safety.

The invention discloses a method for efficiently converting furfural to gamma-valerolactone by using POMOF catalyst synthesis and a one-pot method. In an isopropanol solvent, the one-pot method is used for converting the furfural into the gamma-valerolactone. The reaction process comprises the following steps: putting furfural, isopropanol and POMOF into a high-pressure reaction kettle, uniformlycarrying out mixing, carrying out sealing, then carrying out stirring for 1-48 hours at a temperature of 120-180 DEG C, and carrying out cooling to obtain a gamma-valerolactone solution. The catalystused in the method is cheap, is easily available, and has stable catalytic performance and good reusability. In addition, a hydrogen environment is not needed in the whole reaction, inorganic acid isnot used, and high operation safety and very good industrial application potential are achieved.

The invention provides a metal cotton ball packing box sealing device. Guide plates for conveniently pushing opened packing boxes into a gluing station are mounted on a console panel; a pushing motoris mounted in the center position of a main machine; an upper push plate is mounted above the pushing motor, and is arranged between the guide plates on the left and right sides; a glue cylinder is arranged on the main machine; a gluing device is arranged above the glue cylinder, and comprises a cylinder; the cylinder is fixedly mounted on a fixed mounting frame through a cylinder fixing plate; agluing plate realizes up-down movement by the cylinder driving an extension rod; clamping plates are arranged right above the guide plates, and are fixedly mounted on the fixed mounting frame; the bottom ends of the clamping plates are arranged as L-shaped gluing support plates; and the gluing plate and the gluing support plates are used for realizing inner side gluing of metal cotton ball packingboxes. Through cooperation between the clamping plates and the upper push plate, the sealing of the metal cotton ball packing boxes is realized. The device can efficiently pack metal cotton balls, achieves high production efficiency, and prominently reduces the labor cost.

The invention relates to a method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits, and belongs to the technical field of ozone assisted ultraviolet degradation of residues of the following two restricted pesticides: acetamiprid and imidacloprid, in the wolfberry fruits. The method comprises the following steps: spreading dry wolfberry fruits on a tray to make the accumulation thickness be 0.5-20cm; and placing the tray with the wolfberry fruits in an irradiation box, and irradiating with ultraviolet rays with the intensity of 450-900[mu]W / cm<2>, generated by an ultraviolet ray emission device in the irradiation box, for 4-12h, wherein the ultraviolet irradiation box is a closed box body, and 1.5-3.5mg / m<3> of ozone is distributed in the ultraviolet irradiation box. The method has the advantages of safety, healthiness, no residual, no influences on the quality of the wolfberry fruits, no pollution to environment, low carbon, energy saving, easy combination with present wolfberry fruit processing technologies, easy realization of industrialization, and cost saving.

The invention discloses a method for reducing the polyaromatic hydrocarbon content in tar of cigarette smoke. The method comprises the steps: packaging tobacco leaves / finished products of cigarettes with cartons, wherein stacking thickness is 26-72cm and stacking density is 0.20-0.34g / cm<3>; and placing the tobacco leaf / cigarette carton on a conveyer at the conveying speed being 0.02-0.3m / s and irradiating the tobacco leaf / cigarette cartons with electron beams / X rays produced by an electron accelerator, wherein the electron accelerator has the energy being 5-10MeV, the beam flow being 0.3-20mA, the beam power being 10-20kW, the maximal scanning width being 100cm, the scanning frequency being 5-15Hz and the irradiation dose being 1-10kGy, the working temperature is set to be 5-35 DEG C, the tobacco leaf / cigarette cartons pass trough a scanning window of the electron accelerator twice to be irradiated, a distance between the center of each tobacco leaf / cigarette carton and the scanning window of the electron accelerator is 40-60cm during irradiation, and the ambient humidity is limited to be not more than 60% during working.

The invention discloses a method for lowering carbon monoxide content in main smoke of cigarette. The method comprises the steps of: packaging tobacco leaves / cigarette finished product with cartons, wherein the stacking thickness is 26-72cm and the stacking density is 0.20-0.34g / cm<3>; and placing the cigarette cartons on a conveying device with conveying speed of 0.02-0.3m / s and irradiating withelectron beam / X ray generated by an electron accelerator, wherein the energy of the electron accelerator is 5-10MeV, the beam current is 0.3-20mA, the beam power is 10-20kW, the maximum scanning width is 100cm, the scanning frequency is 5-15Hz, the irradiation dose is 1-10kGy, the working temperature is set at 5-35 DEG C, the cigarette cartons pass through a scanning window of the electron accelerator twice to undergo irradiation, the distance between the center of the cigarette carton and the scanning window of the electron accelerator is 40-60cm during irradiation, and the ambient humidity is limited to be not more than 60% during working.

The invention discloses a synthesis method of 5-methyl-2-pyrrolidone or derivatives thereof, the synthesis method comprises the following steps: fully mixing levulinic acid (ester) with urea or amideand formic acid, and adding the mixture and a catalyst into a high-pressure reaction kettle for reaction to obtain the target product 5-methyl-2-pyrrolidone or derivatives thereof. After the reactionis completed, the catalyst is filtered and recovered, cleaned and dried before reuse. The method can realize efficient conversion of the levulinic acid (ester) in a solvent-free system, the low-cost and environment-friendly urea or amide is taken as a N source, and the biomass formic acid is taken as a H source, so that the synthesis method has good economy.

The invention belongs to the field of molten steel refining, and specifically relates to a method and device for calcium treatment of molten steel by injecting calcium steam. In the present invention, the calcium source is first put into a high-temperature furnace outside the ladle and heated to generate high-temperature calcium vapor. One end of the high-temperature furnace is airtightly connected to the spray gun through a high-temperature conveying pipe. The spray gun is inserted into the molten steel pool of the ladle. The other end of the high-temperature furnace tube is used. The flange is sealed, and an air inlet pipe is installed on the flange. The inert gas flows into the high-temperature furnace from the air inlet pipe, and the generated high-temperature calcium vapor is carried away from the high-temperature furnace and transported to the spray gun in the molten steel ladle by the high-temperature transportation pipeline. The high-temperature calcium vapor is Steam is carried by an inert carrier gas and blown into the ladle molten pool by a spray gun. The invention has the advantages of high calcium yield, low processing cost, high calcium processing efficiency and strong operation safety.

The invention discloses a tinting device for high-hardness and high-brightness gold jewelry, and particularly relates to the technical field of gold jewelry tinting. The tinting device comprises a quartz crucible and a quartz containing hopper, wherein mounting structures are arranged on the two sides of the top end of the quartz crucible, scales are arranged on the outer side of the quartz crucible, fixing frames are arranged on the two sides of the quartz crucible, a non-contact lifting structure is arranged at the top end of the fixing frame, and the quartz containing hopper is arranged above the quartz crucible. By arranging the quartz crucible, the scales, a liquid discharging hole and the quartz containing hopper, when a lifting rope is unreeled and the quartz containing hopper descends into the quartz crucible, a high-concentration sulfuric acid reagent is immersed into the surface of gold jewelry through the liquid discharging hole to soak and tint the gold jewelry, and after tinting is completed, the gold jewelry is slowly reeled along with the lifting rope, the sulfuric acid reagent leaks back into the quartz crucible from the liquid discharging hole, so that sulfuric acid can be prevented from splashing all around due to external shaking or other reasons when the quartz containing hopper is lifted, and the safety coefficient is increased.

The invention discloses a method for catalyzing levulinic acid or levulinic acid ester to gamma-valerolactone by in-situ reduction of basic copper carbonate / hydroxyl aluminium oxide, and the reactionprocess is as follows: adding the levulinic acid or levulinic acid ester, a secondary alcohol and the basic copper carbonate / hydroxyl aluminum oxide (Cu2(OH) 2CO3 / AlOOH) into a high-pressure reactionkettle, uniformly mixing, sealing, and reacting at 140-220 DEG C for 1-24 hours, and cooling to obtain a gamma-valerolactone solution. The reaction has a good yield in a short time of 5 hours, and theexperiment process is simple and convenient to operate, and the method is low in cost and relatively low in reaction temperature and has a good industrial production prospect.

The invention relates to the technical field of travel control devices, in particular to a travel control device for a planomiller. The travel control device for the planomiller comprises a first gear ring, the first gear ring is provided with a notch, a handle capable of being used for controlling the first gear ring to rotate is arranged in the notch, and a fine adjusting mechanism is further mounted on the handle. According to the travel control device for the planomiller, a switch for coarse adjusting and a switch for fine adjusting are combined together, the switch direction does not need to be adjusted repeatedly, and thus the travel control device is easy and convenient to use and high in operation safety.

The invention provides a method for cleaning a finished copper wire after oxidation, which comprises the following steps of: winding a to-be-treated copper oxide wire on an iron disc, and putting the iron disc into a furnace pipe of an annealing furnace; ethyl alcohol is added into the furnace pipe, and the interior of the furnace pipe is vacuumized to minus 0.1 MPa; then, carbon dioxide is introduced into the furnace pipe until the pressure in the furnace pipe ranges from 0.25 MPa to 0.35 MPa, heating is conducted till the temperature in the furnace pipe ranges from 420 DEG C to 590 DEG C, an upper heating point, a middle heating point and a lower heating point are arranged in the annealing furnace, the heating time of the upper phase is 80 min, and the heat preservation time is 40 min; the heating time of the middle phase is 60 minutes, and the heat preservation time is 40 minutes; the heating time of the lower phase is 60 minutes, and the heat preservation time is 40 minutes; and finally, gas in the annealing furnace is exhausted, the furnace pipe is taken out and cooled for not less than 12 hours, the iron disc is taken out, and the treated bright copper wire is obtained. Alcohol and carbon dioxide are added into the oxidized copper wire, so that the oxidized copper wire can be efficiently cleaned in a high-temperature annealing furnace, the copper wire can be recovered to be bright and clean, the subsequent application of the finished copper wire is not influenced, and the material is safe and environment-friendly, high in operation safety and environment-friendly.