2179results about How to "Improve production safety" patented technology

The invention provides a preparation method of graphene, and particularly relates to a method for preparing biomass graphene employing cellulose as a raw material. The specific preparation method comprises the following steps: 1, preparing a catalyst solution; 2, carrying out ionic coordination and high-temperature deoxidization on cellulose and a catalyst, so as to obtain a precursor; 3, carrying out thermal treatment; 4, carrying out acid treatment, and drying to obtain the graphene, wherein the prepared graphene is uniform in morphology, has a single-layer or multi-layer two-dimensional layered structure; the dimension is 0.5-2 microns; and the electrical conductivity is 25,000-45,000S/m. The preparation method is simple in preparation technology, low in cost, high in yield, high in production safety, and controllable in product dimension and physical property; industrialized production can be realized; the graphene prepared by the method can be applied to electrode materials of super capacitors and lithium ion batteries, and can also be added to resin and rubber as an additive; and the physical property of the material can be improved.

The present invention discloses a composite board based on mixed waste polymers and a preparation method thereof. The preparation method of the composite board based on the mixed waste polymers is characterized by comprising the following steps of: (1) weighing the raw materials according to a certain proportion, adding the raw materials to a high-speed mixer, mixing at the temperature of 40-60 DEG C and the rotation speed of 800-2000 rpm for 20-30 minutes, cooling to room temperature and discharging; and (2) adding the mixed material to a mold, vulcanizing at the temperature of 150-180 DEG C and the pressure of 10-15 MPa for 10-20 minutes, cooling and relieving pressure. The composite board based on the mixed waste polymers provided by the invention does not need to consider the complex compatibility and plasticizing problems of multiple polymers, effectively solves the problems that the existing mixed waste polymers can not be classified and are discarded, and can be used as the substitute for wood to be applied in the tray manufacturing field and other fields. The production process provided by the invention is simple, uses existing equipment and is suitable for mass production.

The invention discloses a high-performance recycled PET/ABS alloy. The alloy comprises the following components in percentage by weight: 30 to 80 percent of recycled PET, 10 to 50 percent of ABS, 1 to 10 percent of reinforcing agent, 2 to 15 percent of compatilizer, 0.5 to 5 percent of flexibilizer, 0.5 to 3 percent of polyhydroxy chemical coupling agent, and 0.1 to 1 percent of antioxidant. The alloy can improve a recycled PET system by using reasonable matching of additives, effects of the polyhydroxy chemical coupling agent, and excellent physical mechanic properties of an ABS system. Therefore, the recycled PET /ABS alloy has the advantages of high compatibility, high tensile strength, high mobility, good machinability and the like, is particularly suitable for producing complicated components and parts and large plates, has a simple process, is suitable for mass production of medium-sized and small enterprises, and has obvious economic benefit and social benefit.

A method for casing job by using a top drive drilling unit is applied to the petrol cementing technique field, and is characterized in that a casing elevator is used for lifting a single casing which is buckled with a casing string oppositely; a top-driven casing device is driven to tightly clamp the single casing; the top drive drilling unit is driven to revolve, which allows the single casing to be connected with the casing string; an air slips of a drill stand is loosed, which allows a top-driven flying ring and the casing elevator to support the single casing and the casing string; the single casing and the casing string are lowered; the air slips of the drill stand is used for fixing the single casing; slurry is poured to the interior cavities of the single casing and the casing string through a chief axis hydrophthalmia of the top drive drilling unit and a central spindle hydrophthalmia of the top-driven casing device; and finally, all the casing strings are lowered to the well bottom. The method has the advantages of reducing working equipments, simplifying working process, being capable of revolving casing string and cycling slurry timely according to the actual needs, increasing the automatic degree of the casing job, and improving the production efficiency and safety.

The invention relates to a direct graphene film transfer method. Currently, transferring graphene films from metal surfaces is quite inconvenient. The method includes: using the chemical vapor deposition method to grow a graphene film on a copper foil; using oxygen plasma cleaner to clear graphene on one side of the copper foil to obtain a combination of the single-layer graphene film with the copper foil; flatly attaching a transfer carrier onto the surface of the graphene film and drip adding an organic solvent of a proper quality to increase the interaction between the transfer carrier andthe graphene film; using etchant solution to clear the copper foil to obtain a combination of the single-layer graphene film with the transfer carrier; using deionized water to clean the graphene film for multiple times; and using a filter paper to clear the deionized water on the surface of the graphene film. Using the direct graphene film transfer method avoids the graphene films from being damaged by transfer media such as organic colloid and the like, single-layer graphene films of 100 micrometers or more can be obtained, simple equipment is required, product dimension is controllable, production safety is high, and industrial application is easy to implement.

The invention provides a method for preparing a high-specific-surface-area porous graphitic nanocarbon plate with coconut shells serving as raw materials, and relates to a preparation method of a graphitic nanocarbon material, and the method is used for solving the problems of conventional preparation method of the graphitic nanocarbon material that the production cost is high, the process is complex, the safety is poor, the output is low, the industrialization is hard to realize, and the prepared graphitic nanocarbon material is low in specific surface area and poor in graphitic degree. The preparation method comprises the following steps: 1, preprocessing the raw materials; 2, coordinating the raw materials with catalysts and activating agents; 3, curing the coordination compound; 4, thermally treating under an inert gas condition; and 5, carrying out acid leaching, washing by distilled water, and drying, so as to obtain the high-specific-surface-area porous graphitic nanocarbon plate. The porous graphitic nanocarbon plate prepared by the method provided by the invention is high in specific surface area, high in graphitic degree and excellent in electrochemical performance; the method is simple, low in energy consumption, high in safety, and suitable for industrial production; and a scientific way is provided for realizing the resource utilization of biological wastes like the coconut shells.

The invention relates to the technical field of dies and discloses the cutting and drawing process of a basin frame. The cutting and drawing process comprises the material cutting step and the material drawing step. The material drawing step is performed after the material cutting step. Automatic feeding is performed on materials through an automatic feeder before the material cutting step. The blowing step which comprises performing material blowing on the basin frame product after drawing forming is performed after the material drawing step. The machining of the cutting step, the drawing step and the blowing step is performed through the same die. A cutting mechanism, a drawing mechanism and a blowing mechanism are arranged in the die in turn. The cutting mechanism is used for cutting the materials, the drawing mechanism is used for performing the drawing forming on the cut materials, and the blowing mechanism is used for performing the material blowing on the basin frame product after the drawing forming. According to the cutting and drawing process of the basin frame, the cutting mechanism, the drawing mechanism and the blowing mechanism are arranged in the same die in turn for the cutting, drawing and blowing machining and accordingly the automatic process of the cutting, drawing and discharging is achieved, the production efficiency and the safety are improved, and the labor intensity of workers is reduced.

The present invention relates to a system and method of tamper detection. A tamper detection system in accordance with an embodiment of the present invention includes: a passive electronic sensor including a circuit having first, second, and third nodes; a load connected between the first and second nodes of the circuit; a friable electrical connection element connected between the second and third nodes of the circuit; and a storage unit, connected to the second node of the circuit, for storing an identification code of the sensor; wherein in use a voltage is applied across the first and third nodes of the circuit, and when the friable electrical connection element is intact, the second node of the circuit is at a first voltage, and when the friable electrical connection element is broken, the second node of the circuit is at a second voltage.

The invention discloses a beta-carotene microcapsule production method. The method comprises the following steps: performing on-line mixing an oil phase containing beta-carotene, an anti-oxidant and plant oil and a water phase containing a capsule material, the anti-oxidant, a dispersant and water, homogenizing, and performing spray drying to obtain the beta-carotene microcapsule powder. Due to on-line mixing in proportion, a lot of production time is saved, production efficiency is increased, large scale industrial production is convenient, and the beta-carotene microcapsule has the advantages of high homogeneity, high encapsulation efficiency and high stability.

The invention discloses a method for optimizing reliability and maintenance strategy of a piece of chemical refining equipment. The method comprises the following steps of collecting the historical testing and maintaining data of equipment inside a chemical refining device; carrying out the regression analysis by a failure distribution function for the historical data to obtain the characteristic parameters of the reliability and maintenance of single equipment; establishing a mathematical simulation model of system reliability of the chemical refining device, and collecting the relevant economic parameters of the device; carrying out the system simulation analysis for the chemical refining device by using the mathematical simulation model of system reliability, then obtaining the characteristics parameters of system reliability, usability and maintenance of the device, and then further obtaining the testing and maintaining scheme of the optimized system equipment, such as inspecting and maintaining order, frequency and cost; and obtaining the spare part stock scheme of the optimized system equipment, such as purchasing quantity, purchasing cycle and spare part stock, thus adjusting the equipment managing strategy of the device. The method for optimizing the reliability and maintenance strategy of the chemical refining equipment reduces the unplanned fault rate of the chemical refining equipment, and provides guarantee for long-period safety operation of the chemical refining equipment.

A process for synthesizing silicon nitride powder by atmospheric pressure combustion includes such steps as proportionally mixing Si powder with catalyst, adding silicon nitride for activating and combustion reaction. Its main product is Si3N4.

The invention relates to an improved preparation method of an oligomeric phosphate ester, and is characterized in that the method comprises the steps of: obtaining dichloro-monoalkyl phosphate ester monomer through the reaction of phosphorus oxychloride and a monohydric alcohol performing the polymerization of the dichloro-monoalkyl phosphate ester monomer with a dihydric alcohol, and blocking end with a monohydric alcohol. Compared with the prior art, the inventive preparation method has the advantages of easily accessible raw materials, low corrosiveness, low cost (reducing cost by about 50%), no dangerous chemicals as raw materials, good safety, synthesis under relatively low temperature and low pressure, simple process, high production safety factor, simple equipment and operation, and no pollution in production process. The produced hydrogen chloride during reaction can be directly used in production of polyaluminum chloride.

The invention discloses a preparation method of a superfine crystal lead-free delay element for a detonator. The preparation method comprises the following steps: firstly, preparing a superfine crystal Zn-Al alloy blank pipe by adopting casting, extrusion, rolling and machining; then drawing or rolling the superfine crystal Zn-Al alloy blank pipe with delay powder to form a Zn-Al alloy pipe; and finally, cutting and packaging the prepared Zn-Al alloy pipe so as to obtain the Zn-Al alloy delay element. Through using the technical scheme of the invention, lead pollution is avoided, use occasionis not limited, and production process is safer.

The present invention relates to a preparation method of a microcapsule aluminum hypophosphite flame retardant. The method comprises the steps of: first reacting melamine, a formaldehyde solution and a resin modifier under reaction conditions of pH of 8-10 and a temperature of 50-80 DEG C for 0.5-2 h to prepare a melamine resin prepolymer; then slowly adding the prepolymer to water with aluminum phosphate dispersed therein, reacting at 65-95 DEG C for 1-5 h, and treating to obtain the microcapsule coated inorganic aluminum phosphate flame retardant. The obtained microcapsule inorganic aluminum hypophosphite flame retardant has greatly improved water resistance, boiling residual rate of 92% to 97% and average particle diameter of 10-35 mum, solves the disadvantage of flammability of inorganic aluminum hypophosphite, and greatly improves the safety of the production and application process.

The invention relates to a lamp crimping and assembling mechanism, which comprises an upper crimping assembly and a lower crimping assembly, wherein a lower connecting base of the lower crimping assembly is provided with two linear guide tracks and a first cylinder in the transverse direction; a first sliding plate and a second sliding plate are arranged on the two linear guide tracks and are movable; the piston of the first cylinder is connected with the first sliding plate; at least two springs arranged on the first sliding plate are supported to a first limiting plate; the first limiting plate is provided with a mounting surface for mounting parts, a positioning groove and an H-shaped discharge notch arranged on the mounting surface; a second cylinder arranged on the first sliding plate is connected with a supporting plate arranged on the second sliding plate; a second limiting plate is arranged on the supporting plate; the second limiting plate is provided with a mounting surface for mounting parts and more than two spacing grooves; and the first sliding plate is provided with a positioning block for height positioning of the second limiting plate, and the positioning block is provided with a side positioning notch. The lamp crimping and assembling mechanism ensures that two parts can be placed in a staggered mode, can improve the assembly efficiency, and has accurate positioning, and safe and convenient operation.

The invention relates to the technical field of a mineral slag grinding system, and in particular relates to a novel mineral slag grinding system, wherein a discharge hole of a feeding bin is connected with a feeding hole of a first bucket elevator by a belt conveyor; a discharge hole of the first bucket elevator is connected with a feeding hole of a vertical mill machine; a discharge hole of the vertical mill machine is connected with a feeding hole of a bag type dust collector; a discharge hole of the bag type dust collector is connected with a feeding hole of a second bucket elevator by an air chute. According to the system, a raw material discharged from the feeding bin is conveyed into the first bucket elevator by the belt conveyor and is conveyed into the vertical mill machine by the first bucket elevator so as to be ground; a ground material is collected by the bag type dust collector, and is conveyed into a finished product storage sequentially by the air chute and the second bucket elevator; in the grinding process, the ground material is blown by high-speed airflow by a gas hot air furnace and an air cooler, thus being conveniently collected; the novel mineral slag grinding system is reasonable in design, high in productivity and high in production safety.

This invention provides one new part management system, which combines with current production device maintain system, bare management system, online system integration, associate work part use status and real use time information to give detail advice on work human part for rapid and accurate judgment on device plan sustaining time and to recycle the parts and spare parts by alarming the device dangers.

The invention discloses an automatic panel production line. The automatic panel production line comprises a cutting device, an edge sealing device and a packaging device which are arranged in the panel machining direction, an automatic panel carrying device is arranged between each upstream machining device and the corresponding downstream machining device and comprises a panel conveyed-out area, a storage guide rail, a storage location area, a stock removal guide rail and a panel conveyed-in area; roller conveying machines are arranged in the panel conveyed-out areas and the panel conveyed-in areas respectively; a plurality of roller conveying machines are arranged in the storage location areas and are arranged to be in at least one row; two conveying trolleys are arranged on the storage guide rails and the stock removal guide rails respectively and are each provided with a traveling motor, a rotary encoder and a roller conveying machine; each roller conveying machine is provided with a drum motor, and a photoelectric sensor used for panel in-place detection is arranged at the output end of each roller conveying machine. The device further comprises a master controller which is electrically connected with drum motors, the photoelectric sensors, the traveling motors and the rotary encoders. The automatic panel production line is reasonable in design; the automatic panel carrying devices are introduced, so that the manpower is released, and the yield and the production safety performance are improved.