71results about How to "Not easy to secondary pollution" patented technology

The invention relates to a purification method of phosphoric acid, which belongs to the technical field of phosphorous chemical industry. The technical problem to be solved by the invention is to improve the purity of the phosphoric acid, effectively remove impurities of anions and cations and obtain high-purity acid for preparing industrial-grade or food-grade phosphoric acid. The technical scheme of the invention is as follows: the purification method of the phosphoric acid adopts the three-chamber electrodialysis method and comprises the following steps: adding phosphoric acid solution to be purified in an anode chamber, adding acid solution in a cathode chamber, and adding ultrapure water or diluted phosphoric acid in an intermediate chamber; and carrying out electrodialysis under the action of a direct current electric field, leading phosphate radicals in the anode chamber to pass through an anion exchange membrane and enter into the intermediate chamber, leading hydrogen ions in the cathode chamber to pass through a cation exchange membrane and enter into the intermediate chamber, and finally obtaining the purified phosphoric acid in the intermediate chamber. The method can separate the phosphoric acid from impurities through the action of the attraction force of the electric field, the concentration difference diffusion and the selective permeability of the anions and the cations and obtain the purified phosphoric acid in the intermediate chamber, the process is simple, and the obtained product has good quality, thereby providing the new process for purifying the phosphoric acid.

The invention discloses a cleaning method for a high-light-transmittance glass screen of a smart phone or a tablet computer. The method comprises the following steps of performing negative ion blowing dust removal on the high-light-transmittance glass screen by using a negative ion fan; circularly cleaning with a weak base solution; performing ultrasonic washing; spraying and washing; air drying; performing drying; and removing steam at high temperature and low pressure. The negative ion blowing dust removal is adopted to remove positively charged dust attached to the surface of the high-light-transmittance glass screen, oil stains, sweat stains and other impurities can be effectively removed through cleaning with a weak base solution, fine impurities which cannot be observed by naked eyes are effectively cleaned away through ultrasonic washing and spraying washing, the high-light-transmittance glass screen can be effectively cleaned through air drying and drying, water mist on the surface of the high-light-transmittance glass screen is removed in a clean state, water vapor in a microscopic state of the high-light-transmittance glass screen is removed through high temperature and low pressure, so that a clean and dry screen is formed, a dust-free high-transmittance glass screen condition is provided for the smart phone or the tablet computer, and the fidelity of a visual effect is improved.

The invention discloses a sausage processing method adopting superheated water assisted radio frequency sterilization. The method comprises the following steps: (1) adding a proper amount of side dishes into meat, and stirring to prepare meat stuffing; (2) preparing the meat stuffing into sausages; (3) pricking a plurality of holes in the sausage casing, then steaming the sausage, and naturally cooling and packaging the sausage; and (4) sterilizing the sausages by adopting a combined mode of superheated water and radio frequency sterilization, wherein the temperature of the superheated water is 110-120 DEG C, and the distance between the upper polar plate and the lower polar plate is 180-200mm, the heating time is 20-30 min, and the pressure of the sterilization kettle is 2-3 bar. On the basis of traditional sausage processing, meat is used as a main raw material, starch is preferably used as an auxiliary material, and collagen casings which are less used in food industrial production are introduced, so that the nutritional value of food is improved. On the basis of traditional radio frequency sterilization of the meat sausages, a high-temperature and constant-temperature water bath environment is used for assistance, and the defects that the geometric center of traditional superheated water is slow in temperature rise and low in sterilization efficiency are overcome, so that the temperature rise rate and the sterilization efficiency of the meat sausages are obviously improved on the basis of ensuring the heating uniformity.

The invention discloses a drug delivery flow control injector, and relates to the field of medical instruments. The injector based on a micro motor comprises an injection device used for outputting aninhibitor, a propulsion device used for extruding the inhibitor to be output to a needed part, and a storage device used for containing the inhibitor. The injection device is divided into a cutter head, a tip end, a fine needle and a needle tube from top to bottom; the reciprocating propulsion device comprises an internal micro motor, an external protective housing, a screw rod piece, a nut bodyand a piston; and a containing box is arranged in the storage device, so that medicine needed in a process of being injected into the human eyes can be quantitatively loaded. According to the invention, the quantitative medicine can uniformly cover the surface of the eyeball continuously in an operation, the conveying dosage can be better controlled by pumping force, the convenience of the operation is improved, the speed is controllable, the operation is sensitive, and the defects of low precision and difficult control caused by a manual pushing mode of a traditional injector at present can be overcome.

The invention discloses a washing machine. The washing machine comprises a box body, a rotary tub, a supporting shock-absorbing assembly and an impeller, wherein the rotary tub can be rotatably arranged in the box body, one end of the shock-absorbing assembly is connected with the lower portion of the box body, the rotary tub is supported by the other end of the supporting shock-absorbing assembly, and the impeller can be rotatably arranged in the rotary tub. The washing machine has the advantages of large capacity, saving water and environmental friendliness, secondary pollution resistance, strong stability, low noise and the like.

The invention discloses an automatic paving device for geotechnical materials. The device comprises a walking machine, a connecting mechanism, a paving frame, a compacting mechanism arranged on the rear side of the paving frame, an automatic paving mechanism arranged on the paving frame and an impurity discharging rubber pad arranged below the front side of the paving frame. The connecting mechanism comprises a fixing frame, a rocker arm and a plurality of obliquely-arranged supporting oil cylinders. The compacting mechanism comprises a plurality of adjusting combinations, a transverse steel plate and a compacting rubber pad; the automatic paving mechanism comprises a rotating shaft and a plurality of transmission combinations, the two ends of the rotating shaft are supported on the two sides of the paving frame respectively, and the transmission combinations are arranged on a plurality of oblique beams of the paving frame respectively and comprise motors, driving wheels and driven wheels. The whole laying process is mechanized in construction, a plurality of rolls of geotechnical materials can be installed according to the length of an operation face, continuous operation can be achieved without pause and replacement in the laying process, the walking machine can walk on various terrains, the laying requirement of the complex environment is met, and normal laying can be conducted on a road section with a large longitudinal slope.