86results about How to "Friendly working environment" patented technology

The invention discloses a functional composite fiber and a preparation method thereof. The functional composite fiber comprises 15wt%-45wt% of silicon dioxide and 0.5wt%-10wt% of chitosan quaternary ammonium salt. The preparation method comprises the following steps: (1) preparing an antiseptic solution from the chitosan quaternary ammonium salt, deionized water and sodium hydroxide; (2) preparing alkali cellulose from cellulose pulp, yellowing the alkali cellulose and dissolving the yellowed alkali cellulose in a sodium hydroxide solution of the silicon dioxide, wherein the solid content of spinning viscose containing silicon dioxide is 9.5wt%-11.5wt%; (3) adding the antiseptic solution into the viscose solution containing silicon dioxide in any step from yellowing to spinning to prepare a blended viscose solution, wherein the weight of the chitosan quaternary ammonium salt in the added antiseptic solution accounts for 0.5%-10% of that of the solid in the viscose solution; and (4) performing spinning forming and after-treating on the blended viscose solution to obtain the functional composite fiber. The functional composite fiber prepared by the method has both flame retardant and antibacterial properties.

The invention discloses a method for manufacturing colorful multilayer sheets. The method does not use tacky adhesions, concretely the tacky adhesions containing DMF or MEK solvents, during the manufacturing of mono-color or multicolor multilayer sheets used for vamps, thereby preventing formation of bubbles in the sheet materials and creases in sheet layers, and improving road holding of frictional forces. The method further comprises embossing appearance designs such as patterns on surfaces of thermoplastic polyurethane so as to improve adhesion stress of a TPU layer and a PU layer, thereby preventing the PU layer from separating from a hot melt adhesive layer.

The invention discloses a method for preparing glass fiber reinforced plastic through vacuum flow guide. The method comprises the following steps: laying a fiber cloth in a die, starting a vacuum pumpand vacuumizing to enable the vacuum degree of a sealed space in the die to achieve 0.08-0.1MPa, pouring matrix resin into the die, and curing to form the glass fiber reinforced plastic. The processis simple, green and pollution-free; and the composite material has the advantages of being high in mechanical property, wide in application prospect and the like, and is wide in application field.

The invention relates to a method for recovering metal lead from solid lead oxide. The method is characterized by comprising the following steps: (1) subjecting vulcanized lead concentrate to chlorination leaching, and crystallizing the leachate to obtain solid lead chloride; (2) carrying out first conversion on the solid lead chloride by using calcium oxide to generate basic lead chloride PbOHCl, and then carrying out second conversion between PbOHCl and a sodium hydroxide solution to obtain solid lead oxide; (3) preparing a sodium hydroxide solution as the electrolyte, mixing a proper amount of electrolyte and lead oxide, stirring to obtain paste, evenly painting the paste on a negative electrode plate, installing the negative electrode plate and a positive electrode plate into an electrolysis tank, and carrying out electrolysis; (4) after the electrolysis, peeling off the sponge lead from the negative electrode plate, pressing the sponge lead into balls, and casting the lead balls into lead ingots. The provided method can solve the problems existing in the process of recovering lead from chlorinated leachate of vulcanized lead concentrate through a conversion-solid electrolysis technology, and has the advantages of friendly operation environment, strong operability, high current efficiency, and low production cost.

The invention provides a movable sludge material conveying box. The movable sludge material conveying box comprises rails, a material trolley, a sludge self-discharging material box and an electroniccontroller, wherein the rails are two parallel suspended steel rails; the material trolley comprises a driving device, a driven wheel set and a driving wheel set; the sludge self-discharging materialbox is fixed on the material trolley, an open feeding port is arranged at the top, discharging doors which are opened oppositely are arranged at the bottom, and a box body is symmetrically distributedwith respect to the rails on the two sides; a discharging door unit comprises a pair of the symmetrically distributed discharging doors and a reciprocating mechanism connected with the discharging doors, and the discharging doors synchronously move to two sides to be opened or synchronously move oppositely to be closed; and the electronic controller is connected with the driving device and the reciprocating mechanism, controls the material trolley to walk or stand still on the rails and controls opening and closing of the discharging doors. The movable sludge material conveying box has a large-volume conveying function, achieves material reciprocating conveying according to the line distance between the conveying starting point and the final point and achieves automatic running and operation. The discharging doors are closed and opened automatically, and discharging is thorough.

The present invention relates to a closed type tea steaming and pressing device. The device comprises a body frame, an air drawing hood, a movable bracket, a tea steaming box, a water gathering tank, a pipeline, a rotating cylinder, two sets of sliders, an electric control box and cylinder, a upper fixing frame is fixedly arranged at the upper end of the inside of a side board of the body frame, the air drawing hood is arranged at the top of the upper fixing frame, a switch body is arranged at the top of the air drawing hood, the switch body is connected with the rotating cylinder, both sides of the movable bracket are respectively connected with the two sets of sliders through bracket base plates, the two sets of sliders are in slip connection with two rail lines of the inside of the side board of the body frame, a bracket connecting base is connected with the head of a piston rod of the cylinder through connecting blocks, a vapour hood is arranged at the bottom of a top tray of the movable bracket, the tea steaming box is arranged on the top tray of the movable bracket, the pipeline is arranged at the upper end of the outer side of the side board of the body frame by crossing one end of the water gathering tank, and the other end of the pipelinr is arranged in the vapour hood. The steaming time can be set without additional timing, the steaming is uniform and good in effect; and vapour movement is limited in the closed type device with good operating environment; and the closed type device can be used for automatic production line.

The invention relates to a method for rectifying dimethyl phosphite. The method comprises the following steps that after raw materials are fully reacted in an esterification reaction kettle, crude ester enters the rectification kettle, a first rectifying tower and a second rectifying tower are arranged at the top of the rectifying kettle, and the first rectifying tower and the second rectifying tower are continuously heated; the first rectifying tower firstly collects low-boiling-point substances in the materials into a low-boiling-point substance storage tank, and tower bottom discharge liquid enters the second rectification tower for further separation; a vacuum unit is started for vacuum concentration, high-purity dimethyl phosphate is collected into a product storage tank, and tower bottom residual liquid is high-boiling-point substances. The technical process is simple, the production time is short, the product purity is high, the yield is high, continuous production can be achieved, the cost is low, the fuel utilization rate is high, emission is basically avoided, the environmental pollution is small, the reaction operation safety is high, the labor intensity is low, the labor efficiency is high, the product quality is good, and industrialization is facilitated.

The invention provides a continuous production device for a lamp tripod. The device is characterized by comprising a rack, a rotating plate which is arranged on the rack and driven through power, a clamp which is arranged in the periphery of the rotating plate to clamp the lamp tripod, an U-shaped lamp tripod forming station, a metal plate welding station, a metal wire welding station, a metal barrel welding station and a blanking station, wherein all the stations are arranged on the rack and sequentially positioned along the peripheral outer sides of the rotating plate. Compared with the prior art, the device has the advantages of being fully automatic to produce the lamp tripod, labor saving, high in production efficiency, stable in processing quality, and working environmentally friendly.

The invention discloses a crushing and sorting process of a scrapped car body. The crushing and sorting process comprises the following steps of (1) gradually crushing the scrapped car body into preliminary dimensions in a two-stage crushing mode; (2) respectively separating and recycling light substances, magnetic metals, non-ferrous metals, micro powder substances, glass, rubber and plastic in sequence after the car body is crushed by adopting a negative pressure-cyclone separation process, a magnetic sorting process, an eddy current sorting process and a roller screening process. Accordingto the crushing and sorting process, the scrapped car body is crushed and sorted in a two-stage crushing and multi-sorting mode. The requirement of disassembling operation of an enterprise for disassembling the scrapped car body is fully satisfied, and the crushing and sorting process is an initiative technological process in the domestic existing same disassembling industry.