82results about How to "Improve chemical reaction efficiency" patented technology

The invention discloses a wet-strength wastepaper recycling double-pH-value chemical and mechanical pulping method. The method includes a material preparation section, a steaming section, a first extrusion and impregnation chemical and mechanical treatment section, a second extrusion and impregnation chemical and mechanical treatment section, a latency and re-defibering section and a purification, screening and concentration section. Wet-strength wastepaper fiber dissociation re-pulping is achieved while original pulp strength is not reduced through the mechanical strong force effect and the chemical treatment effect. Furthermore, on the two extrusion and impregnation chemical and mechanical treatment sections connected in series, a wet strength agent in wastepaper is oxidized under the acid condition firstly, hydrolysis is further promoted under the alkaline condition, chemical bonding between molecules of the wet strength agent and between the wet strength agent and pulp fibers is more effectively damaged, and the fiber dissociation rate and the re-pulping yield are effectively increased. The problems that the wet-strength wastepaper recycling pulping dissociation rate is low and strength is greatly decreased are solved, and continuous, large-scale, low-water-consumption and low-energy-consumption pollution-free and environment-friendly pulping can be achieved.

The invention provides a swirling flow flash smelting process. The process comprises the following steps that (1) raw materials are prepared, and raw ores and fluxing agents are crushed and dried; (2) swirling flow is manufactured, an airflow guide-in device arranged on the sidewall of a reaction tower of a flash furnace is used for jetting reactant gas into the flash furnace at a high speed and brings heat in, a swirling flow area is formed in the reaction tower, and a high-temperature environment of 1000-1450 DEG C is formed in the reaction tower; (3) materials are charged; and (4) swirling flow smelting is carried out. Through the swirling flow flash smelting process provided by the invention, on one hand, the dropping track of ore powder can be lengthened, and the ore powder can make more contact with the reactant gas, so that the chemical reaction efficiency of the ore powder and the reactant gas in the space of the reaction tower is improved, the smelting efficiency of the ore powder is improved, and the utilization rate of the reactant gas is increased; and on the other hand, the dispersion effect of the ore powder can be optimized, the ore powder is orderly distributed from the center of the reaction tower to the edge according to the sizes of particles, and the situation that the materials are stacked in the center of the flash furnace is avoided.

The invention discloses a wet-strength waste paper recycling chemi-mechanical pulping system. The system comprises first conveying equipment, a material crushing machine, second conveying equipment, a rotary-drum type washing machine, an oblique spiral dehydrator, a steaming bin, a third spiral conveyor, a first double-screw impregnation machine, a first reaction bin, a fourth spiral conveyor, a second double-screw impregnation machine, a second reaction bin, a fifth spiral conveyor, a latency chest, a pulp pump, a defibering machine, a purifying and screening concentrating device and a pulp storing device in the material process operation direction. Uniform feeding is achieved through the uniform feeding type reaction bins to reduce the fluctuation amplitude of loads; by means of the rotating material pushing type steaming bin, the bridging phenomenon is eliminated, materials are sufficiently steamed and softened, and chemical consumption is reduced; by means of the double-screw impregnation machines, wet-strength waste paper is gradually dissociated, high-concentration mixing and homogenizing impregnation of chemical auxiliaries and pulp are achieved, and the chemical reaction efficiency is improved; the problems that the dissociation rate of recycled wet-strength waste paper for pulping is low, and the strength is greatly reduced are solved by means of mechanical strong force and the chemical treatment effect.