35results about How to "Evenly prepared" patented technology

The invention provides a uniform solution feeding system for multi-nozzle electrospinning mass production equipment. The system comprises a spinning solution preparing device, a spinning solution distributing device and a spinning unit, wherein the spinning solution distributing device comprises a spinning solution distributing tank, a row of solution distributing ports are formed in the distributing tank at equal intervals, a return pipe is arranged and connected to the head end and tail end of the distributing tank, a solution distributing valve is arranged at the position, near the tail end of the distributing tank, of the return pipe, and a pressure sensor capable of controlling opening and closing of the solution distributing valve is arranged in the distributing tank; the spinning unit comprises a spinning pipe connected with the distributing tank, a row of spinning nozzles are arranged on the spinning pipe at equal intervals, and a depressurization port is formed in the end, away from the distributing tank, of the spinning pipe. By means of the spinning solution preparing device, the spinning solution distributing device and the spinning unit which are arranged in an integrated mode, preparation and uniform distribution of spinning solutions can be achieved, solutions can be fed to tens of thousands of spinning nozzles uniformly at the same time, so that the spinning solutions sprayed out of the tens of thousands of spinning nozzles have the same pressure and same flow rate, and mass production of electrospinning is achieved.

The invention discloses a coating for repairing a molded windshield ring for a casting furnace, which comprises the following components in part by weight: 20 to 30 parts of fire clay, 70 to 80 parts of No.4 quartz sand and the balance of water. The coating also comprises coal tar which accounts for 2 to 5 percent of the mass of the coating. The fire clay comprises the following components in part by weight: 50 to 70 parts of refractory clay, 20 to 40 parts of high alumina powder and 5 to 15 parts of magnesia powder, wherein chromium ore powder is mixed in the No.4 quartz sand and accounts for 5 percent of the total mass of the No.4 quartz sand. The coating has the advantages of better repairing effect, wider application range, lower production cost, stronger toughness and convenience forrepairing a net structure.

The invention proposes a preparation method of highly compatible oil-coal slurry, which includes the following steps: coal washing, crushing and drying, and grinding the dried coal into coal powder; mixing coal powder and heavy oil in a certain proportion; adding a catalyst , stirred to make oil-coal slurry; the coal meets the following requirements: volatile matter ≥ 37%; hydrogen-carbon atomic ratio ≥ 0.75; inertinite content ≤ 20%; vitrinite reflectance ≤ 0.65; The following requirements: ash content ≤ 1.0%; dynamic viscosity ≤ 1500mPa.s at 100°C; hydrogen-carbon atomic ratio of 0.7-1.70; aromaticity greater than 0.20. The oil-coal slurry prepared by this method has a high matching property, which can avoid the problem that the coal and heavy oil in the oil-coal slurry are separated and cause the oil-coal slurry to deposit in the preheater or reactor and cause coking due to local overheating. It can give full play to the synergy between coal and heavy oil, improve the conversion rate and oil yield of coal and heavy oil, and thus be more practical.