7results about How to "Overcome churn" patented technology

The invention discloses a non-blending type HfB2 ceramic precursor, ceramic powder and a preparation method, the precursor adopts hafnium oxide as a hafnium source, boric acid ester as a boron source and phenolic resin as a carbon source, and the precursor comprises a cross-linked network formed by connecting the hafnium source, the boron source and the carbon source through chemical bonds; and the Hf, B, C and O elements in the precursor are uniformly distributed on the nanoscale. According to the precursor disclosed by the invention, low-boiling-point boron oxide is prevented from being easily formed in the cracking process of the blended boron source, so that the boron element is not easy to lose in the subsequent cracking process.

The invention discloses a coal gasification slag-based porous sponge for uranium mine wastewater treatment and a preparation method thereof, relates to the field of radioactive wastewater treatment and solid waste recycling, and aims to solve the technical problems of poor adsorption inertia, poor interface stability and insufficient selectivity of the existing coal gasification slag-based material in strongly acidic uranium mine wastewater. According to the technical key points, the method comprises the following steps: step 1, preparing an alkaline solution, putting the coal gasification slag into the alkaline solution for etching treatment, and collecting the treated coal gasification slag to obtain solid powder A; 2, grinding and mixing the solid powder A and urea, and performing pyrolysis treatment in a nitrogen atmosphere to obtain nitrogen-doped coal gasification slag-based porous sponge B; 3, placing the porous sponge B in a mixed acid solution of nitric acid and hydrochloric acid for carboxylation modification to obtain sponge C with the surface rich in carboxyl; step 4, immersing the sponge C into a PEI aqueous solution; pEI is chemically bonded with the sponge through carboxyl on the sponge C, and the coal gasification slag-based porous sponge is obtained.

This invention discloses a self-regulating circulating reinforcement system and construction method based on construction solid waste and synergistic MICP (Mineralized Organic Powder). The system includes a matrix construction layer, a dual-channel grouting pipe network, a grouting unit, a circulating drainage unit, a permeability monitoring unit, and a central control unit. The method includes: pre-mixing crushed and screened construction solid waste with mineralized bacterial solution for backfilling; laying a dual-channel grouting pipe network; using the central control unit to calculate the target stiffness based on a multi-level loading cumulative plastic strain prediction model, and controlling the injection flow rate and pressure of the gelling liquid; and recovering the reaction byproduct ammonium ions in real time through the circulating drainage module, and adjusting the grouting strategy based on the chemical parameters of the backfilled liquid. This application not only realizes the resource utilization of construction waste, but also solves the problems of uneven MICP reinforcement and ammonium contamination through intelligent closed-loop control, and possesses the ability to self-repair and replenish soil damage in the later stages.

The present invention relates to a method for preparing flame-retardant regenerated cellulose fiber, which comprises modifying high-polymerization degree pulp with a reactive flame retardant, dissolving the modified pulp in N-methylmorpholine oxide (NMMO), and spinning the fiber with a dry-wet method. The preparation method of the present invention is simple, the spinning process is green and environmentally friendly, and has good economic and social benefits. The prepared Lyocell fiber has excellent flame retardant properties, mechanical properties, and washing resistance.

The invention relates to a single-shaft double-pipe mixing pile machine which comprises a pile frame and a power head, a drill rod connected with the power head is arranged on the pile frame, the single-shaft double-pipe mixing pile machine is characterized by further comprising an air compressor, the drill rod comprises an outer pipe and an inner pipe located in the outer pipe, an air channel is formed between the outer pipe and the inner pipe, and the air channel is communicated with the air compressor. The air channel is connected with the outlet end of the air compressor, a plurality of air injection holes are formed in the outer pipe, a cement paste input port is formed in one end of the inner pipe, a cement paste output port communicated with the outside of the outer pipe through a cement conveying pipe is formed in the other end of the inner pipe, and a stirring and smashing structure is arranged on the outer pipe. According to the single-shaft double-pipe mixing pile machine, cement can penetrate into a soil body, and the problem that the depth of cement sprayed by an existing mixing pile machine entering the soil body is small is solved.

The utility model discloses an anti-solidification storage tank for dry-mixed mortar, relates to the technical field of dry-mixed mortar storage tanks, and aims to solve the problems that the existing dry-mixed mortar storage tank prevents solidification of the dry-mixed mortar in a water adding manner, but the concentration of the mortar is influenced by water adding, so that the mortar is easy to lose or fall off in the construction process. Comprising a stirring tank, a movable carrying seat is arranged at the bottom of the stirring tank, a base table is arranged at the lower end of the movable carrying seat, and a carrying platform is arranged over the base table; the sealing receiving tank is arranged above the stirring tank, the sealing receiving tank and the carrying platform are of an integrated structure, a driving motor is arranged at the top of the sealing receiving tank, and measuring tanks are arranged on the two sides of the driving motor respectively; and the storage groove is formed in the connecting position of the movable carrying seat and the base table, and a telescopic hydraulic cylinder and a distribution box are arranged on the outer side of the storage groove.

The invention relates to a single-shaft anti-slurry-leakage cement mixing pile drill bit structure which comprises a drill bit body, the drill bit body is sequentially provided with an upper horizontal cutter strip, a lower horizontal cutter strip and a spiral cutter strip from top to bottom, the upper horizontal cutter strip is connected with the upper ends of a plurality of upper vertical cutter strips, and the lower horizontal cutter strip is connected with the lower ends of a plurality of lower vertical cutter strips. The lower vertical cutter strips are distributed in the extending direction of the lower horizontal cutter strips, lower vertical cutter strip cutting edges extending in the extending direction of the lower vertical cutter strips are arranged at the two ends, in the circumferential direction of the drill bit body, of the lower vertical cutter strips, and the lower ends of the upper vertical cutter strips downwards exceed the upper ends of the lower vertical cutter strips. The drill bit has the advantages that cement and soil can be fully mixed to reduce loss when passing through a sand layer, and the problem that cement is prone to loss when passing through the sand layer due to the fact that an existing drill bit cannot be fully mixed and smashed during construction is solved.