40results about How to "Less investment in transformation" patented technology

The invention discloses a rice rhizosphere available heavy metal control system, comprising a rice field simulation device and a fine rice field water management device, wherein the rice field simulation device comprises a shell of which the upper end is opened and surface soil fed into the shell and used for planting rice, the surface soil is formed by collecting metal contaminated rice field soil layer by layer and backfilling the shell with the soil, the shell is filled with water till exceeding the surface of the surface soil to form overlying water, and a rhizosphere water collector as well as an Eh probe and a pH probe connected with rhizosphere Eh and pH monitoring equipment are inserted into the surface soil; and the fine rice field water management device comprises field Eh and pH supervision equipment and intelligent irrigation and drainage equipment connected with the field Eh and pH supervision equipment. The invention further provides a rice rhizosphere available heavy metal control method. The system and the method can reduce the blindness in field water management of current heavy metal contaminated rice fields, improve the scientificity of field water content management and gain maximum benefits of field water management for inhibiting rice from absorbing available heavy metals.

A method for preparing dichloropropanol from glycerol, the method comprising the steps of: mixing glycerin with a carboxylic acid catalyst, and carrying out chlorination reaction of the obtained mixture with HCl in a chlorination reactor; sending the obtained reaction mixture to into the reactive distillation tower (3) to contact with HCl to continue the chlorination reaction; the water, hydrochloric acid and part of dichlorohydrin produced by the reaction are steamed from the top of the reactive distillation tower (3), and the product is recovered after condensation The still liquid of reactive distillation column (3) enters purifying distillation column (4) and carries out purification and separation. The method is easy to operate, can increase the reaction rate and the utilization rate of HCl, and the yield of dichloropropanol can reach more than 80%.

The invention discloses a multi-hole superfine denier polyamide 6 POY / FDY interlacing composite fiber, its preparation method and its device. The invention is characterized in that a current FDY production device is used, a raw material polyamide 6 is sliced and dried, an additive is on-line added, the sliced polyamide 6 is subjected to screw extrusion and melt extrusion, strand which is subjected to annealing and circular-blow wind cooling solidification is divided in to two beams, one beam of the strand is subjected to oiling, pre-networking, stretching and thermosetting to obtain FDY; another beam of the strand is subjected to oiling and then is input to a first godet roller, and then subjected to pre-networking and input to a second godet roller to obtain POY, then simultaneously input in an interlacing nozzle for compositing, a process of winding formation is carried out to prepare the multi-hole superfine denier polyamide 6 POY / FDY interlacing composite fiber. According to the fiber molecular structure performance design and the fiber form control, a process optimization scheme is determined to obtain the composite silk fiber with differential linear density, differential elongation and differential shrinkage, the fiber has the advantages of moisture absorption, breathability, good drapability, high color rendering, good comfortableness and the like.

The invention provides a reduction furnace high-voltage starting system. A 12-rod-pair power adjusting cabinet and a 24-rod-pair high-voltage starting system are connected to a silicon core of a reduction furnace through a separation switching cabinet respectively. After the 24-rod-pair high-voltage starting system is connected with a single-phase silicon core under switching by the separation switching cabinet, the 24-rod-pair high-voltage starting system is used for applying a breakdown voltage to the single-phase silicon core until breakdown of the single-phase silicon core. The 12-rod-pairpower adjusting cabinet is used for connection with the single-phase silicon core in preset time after breakdown of the silicon core and under switching by the separation switching cabinet, and is used for applying a preset voltage to the silicon core to keep the silicon core in a conducting state. The 12-rod-pair power adjusting cabinet, the separation switching cabinets and the 24-rod-pair high-voltage starting system cooperate with each other to perform high-voltage breakdown and switching of a next single-phase silicon core until silicon cores in three phases are all connected to the 12-rod-pair power adjusting cabinet. Correspondingly, a high-voltage starting method for the reduction furnace high-voltage starting system is provided. The reduction furnace high-voltage starting systemand method can ensure rapid breakdown of the silicon cores and do not damage elements of the 12-rod-pair power adjusting cabinet.

The invention discloses a process for producing an enameled wire for a compressor. The process comprises the following steps of: an extrusion procedure: extruding an oxygen-free copper rod produced by the continuous casting and rolling process to obtain a bare copper wire; cleaning the bare copper wire, removing oil stain and attachments on the surface of the bare copper wire to achieve the surface cleanness required by a painting procedure; and a painting and baking procedure: painting the bare copper wire in a manner of supplying paint by a metering pump and painting by a plurality of moulds, wherein the primer is polyesterimide and the finish paint is polyamideimide composite insulation paint; carrying out secondary baking by using hot air circulation and catalytic combustion, and sufficiently combusting solvent in the insulation paint; and gathering the wire to obtain the enameled wire for a compressor. The process disclosed by the invention has simple process, small investment and short time for refitting the current equipment; and the produced enameled wire can fully meet the requirements of the R134a compressor.

The invention relates to a manufacture method of a non-aqueous printing ink wet underglaze colour self-sharpening polishing ceramic glazed tile. The manufacture method is characterized by comprising the following steps of proportioning raw materials, ball milling, iron removal, spraying pulverizing, compacting for moulding, biscuiting, wet underglaze colour decoration, glaze firing, self-sharpening polishing and edging. The self-polishing is as below: in order to prevent passivation of a resin polishing grinding head on a smooth glaze, during normal polishing operation, a ceramic glazed tile product to be polished is added with a rough surface body to be polished; the rough surface body to be polished rubs the polishing grinding head to keep the grinding head sharp. The method has advantages that produced polishing ceramic glazed tile has high strength, brilliant color, rich pattern texture of a ceramic tile as well as high surface flatness and good glossiness of a polishing product. Meanwhile, a production technology has advantages of simple process, low production cost, short sintering period, low energy consumption and simple polishing technology, and is suitable for large-scale production and demand of common consumers.

The invention relates to the technical field of ship structure construction, in particular to a gantry type automatic angle welding vehicle used for fillet weld welding of a plane flat rack unit element sectional material of a ship steel structure. The gantry type automatic angle welding vehicle comprises a gantry walking mechanism, a plurality of welding trolley frame lifting mechanisms, an electrical control system, a flexible drag chain power system and a CO2 gas shield welding device. The welding trolley frame lifting mechanisms are hung below the gantry walking mechanism, the electrical control system controls the gantry walking mechanism, the CO2 gas shield welding device and the welding trolley frame lifting mechanisms to operate, and the flexible drag chain power system supplies power to the electrical control system and provides a gas source needed in work by the CO2 gas shield welding device. According to the gantry type automatic angle welding vehicle, the welding quality of a fillet weld can be ensured, the labor intensity of constructors can be relieved, the welding efficiency is greatly improved, and the production cost is reduced.

The invention provides a ceramic formula, comprising, by weight, 55 to 65 parts of clay, 20 to 30 parts of a flux and 15 to 23 parts of a fluxing agent, wherein the clay is a mixture of purple sandshale and china clay mixed according to a weight ratio of 0.67 to 2.0, the flux is shale, and the fluxing agent is one or more selected from the group consisting of limestone, calcite, diopside, wollastonite, dolomite, talcum and industrial waste residue. A preparation method for a ceramic product comprises the following steps: weighing the clay, the flux and the fluxing agent according to the formula, carrying out crushing and screening with a 250-mesh sieve, wherein the weight of screen residue is 1 to 1.5%, adding water, carrying out blending to obtain slurry and then carrying out drying and granulation so as to obtain powder; grading particles and then carrying out molding so as to prepare a green body; carrying out drying so as to prepare a dry body; and carrying out firing so as to prepare a seasonal ceramic body. According to the ceramic formula and the preparation method for the ceramic product in the invention, raw materials are cheap, process is simple, firing temperature is reduced, production cost is decreased, investment for production equipment is lowered down, production efficiency is improved, and energy consumption is reduced.

The invention relates to a high-precision double-sided grinding method and machine of annular parts with unequal areas of two end surfaces. According to a rule that the rotating speed and the grinding amount of a grinding wheel of a grinding machine are proportionable, a motor transducer is additionally arranged on a circuit of an assisted grinding system of the grinding machine, the area ratios of two different end surfaces of different parts are converted into different grinding amount ratios so that the frequency ratio and the rotating speed ratio are further adjusted; an appropriate rotating speed ratio of a reference grinding wheel and an assisted grinding wheel is reached by changing and controlling the frequency of the assisted grinding wheel circuit; requirements on thickness, roughness, planarity, parallelism and the like can be stably reached or exceeded finally; the production efficiency is greatly increased and is 28 times that of the common M7160; the production cost is effectively reduced; and the batch production of the parts is realized.

The invention relates to a recycling method of unfused zircon sand in a technical process for preparing zirconium oxychloride by an alkaline fusion method, and belongs to the field of preparation methods of zirconium compounds. The technical process for preparing zirconium oxychloride by the alkaline fusion method comprises the following steps of alkaline fusion, water washing, transformation, acidification, crystallization, acid pickling, centrifugation and drying. The recycling method is characterized in that a working procedure of recycling unfused zircon sand is added after the steps of water washing and transformation and before the step of acidification so as to precipitate and separate the unfused zircon from a dilute hydrochloric acid solution of a water transformation material. The working procedure of recycling unfused zircon sand comprises the following steps: (1) dissolving the water transformation material by a diluted hydrochloric acid; (2) leaving the obtained solution to stand for precipitation; (3) performing solid-liquid separation; (4) repetitively washing unfused sand collected in the step (3) with clean water until the washing water is clear; (5) drying the washed unfused sand in the step (3), and supplying the dried unfused sand for alkaline fusion. Through the adoption of the recycling method disclosed by the invention, the recycling rate of the unfused zircon sand reaches 97%, and the recycled zircon sand can be recycled as raw zircon sand, so that the productive rate of zirconium oxychloride products is increased, and the production cost is reduced.