9results about How to "Avoid residual contamination" patented technology

The invention discloses a lignin-based liquid mulching film as well as a preparation method and application thereof, the liquid mulching film is prepared by taking lignosulfonate as a main raw material, compounding the lignosulfonate with chitosan and polyvinyl alcohol to form a basic solution, then carrying out crosslinking modification by epoxy chloropropane and complexing treatment by tetrakis hydroxymethyl phosphonium chloride, and finally adding nano kaolin and uniformly stirring. When in use, the fertilizer is diluted with water and then sprayed on the surface of soil to form a uniform covering film. According to the invention, a phenylpropane structure of lignosulfonate is fully utilized as a rigid framework of a polymer, and the obtained mulching film has good film-forming property, hydrophobicity and heat preservation and moisture conservation performance through a tackifying effect of chitosan, a toughening effect of polyvinyl alcohol and synergistic modification of the cross-linking agent and the complexing agent. The addition of the nano kaolin further enhances the infrared barrier ability of the mulching film and reduces heat loss at night.

This invention discloses a composite dewatering agent for sludge dewatering in wastewater treatment and its preparation method, belonging to the field of sludge treatment technology. The composite dewatering agent comprises, by weight, the following raw materials: 30-50 parts chitosan-acetylcysteine-modified coal gangue, 20-40 parts cationic starch-modified fly ash fiber, and 1-3 parts nonionic surfactant. The composite dewatering agent of this invention, comprising chitosan-acetylcysteine-modified coal gangue, cationic starch-modified fly ash fiber, and nonionic surfactant, significantly improves the sludge dewatering rate through the synergistic effect of each component, utilizing multiple mechanisms such as charge neutralization, adsorption bridging, and the release of bound water through extracellular polymer destruction. This invention fully utilizes solid waste and natural materials in the preparation of the composite dewatering agent, achieving resource utilization of solid waste while avoiding residual pollution from traditional polyacrylamide flocculants and reducing environmental hazards.

The utility model discloses a clamp for assisting tail glue dispensing of a collimator, and relates to the technical field of tail glue dispensing of collimators. Comprising a bottom plate, the top face of the bottom plate is detachably connected with a bearing base, a plurality of first containing grooves and a plurality of second containing grooves are formed in the two sides of the end, away from the bottom plate, of the bearing base correspondingly, and a dispensing operation groove is formed between the first containing grooves and the second containing grooves and formed in the bearing base; the first placing groove is used for limiting the collimator body, and the second placing groove is used for limiting the collimator tail fiber. According to the utility model, the collimator body is limited through the first placing groove, and the collimator tail fiber is limited through the second placing groove, so that after a dispensing part between the collimator body and the collimator tail fiber is positioned in the dispensing operation groove, the technical operation of dispensing tail glue is carried out on the collimator; the problem of residual pollution caused in the auxiliary process of removing the 3M adhesive tape is avoided, and the cleanliness of the product can be effectively improved.

This invention relates to the field of water conservancy equipment technology, and particularly to a suspended ball for water body marking and its recapture counting device. The invention provides a suspended ball for water body marking and a recapture counting device designed for this suspended ball. By cutting a specific paraffin layer on the surface of the suspended ball, precise density control of the suspended ball is achieved. Furthermore, this suspended ball design can be used to accurately collect information such as channel flow velocity, flow rate, distribution water volume, evaporation and leakage losses, etc., replacing the water body marking scheme involving chromatin release and completely avoiding the problem of residual chromatin pollution.

The invention relates to the field of foaming molds, and discloses a polyurethane polishing pad foaming forming mold and a using method thereof.The polyurethane polishing pad foaming forming mold comprises a base, a mounting block is arranged at the upper end of the base, an upper cover is arranged at the upper end of the mounting block, the upper cover is connected with the base through a support assembly, and the support assembly is arranged at the upper end of the base; according to the polyurethane polishing pad foaming forming mold and the using method thereof, the liftable movable ring is matched with the bottom film, so that controllable sealing in the material injection stage is achieved, and raw materials are prevented from overflowing; the bottom film is driven to incline and rotate, so that the raw materials are naturally leveled under the condition of no mechanical contact, and residual pollution is avoided; meanwhile, overflow holes in the movable ring are matched with the fixed scraping plate, so that overflow materials generated due to abnormal foaming can be automatically identified and cut off during mold opening, and the utilization rate of raw materials, the uniformity of finished products and the debugging reliability are improved.

The invention relates to the technical field of medical diagnosis equipment, in particular to a urinalysis method based on a toilet lid and the toilet lid, and the urinalysis method based on the toilet lid comprises the steps of identity verification, test paper positioning, detection starting, quality control and guidance, result interpretation, data recording and synchronization, reset storage and the like. The toilet lid comprises a lid body, a cushion and a mounting base, and the lid body and the cushion are both rotationally connected with the mounting base. A biological recognition assembly, a test paper positioning assembly, a main control board, a quality control detection assembly and a prompt assembly are arranged in the cover body, a control module and a data transmission module which are electrically connected with each other are integrated on the main control board, the control module is electrically connected with the biological recognition assembly, the test paper positioning assembly, the quality control detection assembly and the prompt assembly, and the data transmission module is electrically connected with an external health management APP. According to the invention, convenient operation, precise data management and sanitary safety guarantee of household urinalysis are realized.

The application provides an optical communication transmitting assembly and a preparation method thereof, and solves the problems of fragmentation and material residue caused by uneven support when a Micro-LED array is heterogeneously integrated with a driving wafer. Both paths are realized by alternately bonding and removing a double-sided temporary substrate, combined with the fabrication of a first TSV column and a second wiring layer on the back surface, to ensure that the first wafer is supported during thinning and back surface processing, and to avoid warping and fragmentation. Path one integrates the Micro-LED array and forms a light-transmitting protective layer first, and then performs back surface processing. The light-transmitting protective layer uniformly distributes the support pressure, permanently retains the light-emitting function, avoids pollution, and improves the light extraction efficiency. Path two completes the back surface processing first, and then integrates the Micro-LED array, so that the light-emitting material is not affected by high temperature. Finally, the same structure of the integrated Micro-LED array, the first TSV column and the second wiring layer is obtained, and the two are electrically connected through the TSV. The emitting element is bonded to the interlayer through the second wiring layer, and three-dimensional packaging is realized.

The utility model belongs to mixed technical field, concretely relates to a kind of medical analysis instrument mixing device, including stirring bin, the inner side of stirring bin and the position of top end near are threadedly connected with top plate, rotationally connected with rotating rod in top plate, the bottom of rotating rod and the bottom of top plate are slidably connected with stirring rod, the outside of stirring rod is evenly provided with multiple stirring plate, the outside of stirring rod is fixed with sliding frame, the bottom of top plate is rotatably connected with rotating frame, and rotating frame is slidably connected in the outside of sliding frame, the top of top plate is equipped with the first drive structure for driving stirring rod rotation, the bottom of top plate is equipped with the second drive structure for driving stirring rod up and down movement, the first drive structure includes the protective cover fixed in the top of top plate, the outside of rotating rod and the winding of protective cover inside are provided with pull rope.The utility model can improve solution mixing uniformity, simultaneously, structure need not complex spiral design, simplify processing and cleaning difficulty, avoid residual pollution.