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

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 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 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 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 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 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.