75results about How to "High recycling efficiency" patented technology

A phosphorus recovery crystallization reactor and a phosphorus recovery method, the reactor is a structure of inner and outer double cylinders, the inner cylinder is located at the center of the outer cylinder of the reactor, and the reactor includes: an aeration stripping zone, a crystallization reaction zone , a precipitation separation area, a high-concentration phosphorus sludge area, and a buffer zone; wherein, the crystallization reaction area and the precipitation separation area are connected through the upper part of the buffer zone, so that the sewage after the crystallization reaction in the crystallization reaction area enters the precipitation The separation area does not affect the high concentration phosphorus sludge area. The present invention fully benefits the effective components in the anaerobic treatment of high-concentration livestock and poultry wastewater, improves the pH value of the anaerobic effluent by means of aeration and blow-off, utilizes the higher concentration of phosphorus and ammonia nitrogen in the livestock and poultry wastewater, and passes the phosphorus through Magnesium ammonium phosphate is removed in the form of crystals, and the removal rate of total phosphorus can reach 50-60%, without adding any chemical agents. The recovered phosphorus is in the form of crystals, which is beneficial to the utilization of recovered phosphorus.

The invention provides a method for treating waste printed circuit boards with combination of oxygen-enriched top-blown copper smelting. The method comprises the following steps: (1) heating and removing tin; (2) crushing; (3) mixing and smelting; (4) treating melts; (5) treating smoke in a furnace; and (6) treating the smoke out of the furnace. According to the method, copper concentrates are used as the main raw materials and cooperate with part of waste printed circuit boards; the treatment of the waste circuit boards is combined with oxygen-enriched top-blown copper smelting; organic matters are effectively decomposed in a high-temperature smelting tank; the organic matters and sulphide ore are oxidized to generate heat and achieve self-heating smelting; high-concentration SO2 smoke is used for inhibiting generation of dioxin; secondary air is blown for decomposing residual compounds; the smoke enters an acid production system after being subjected to waste heat recovery, electric dust collection and water-injection cooling. The method is low in energy consumption and high in comprehensive recovery rate of valuable metals, is capable of recycling the waste circuit boards and can solve the problems of serious pollution, generation of hypertoxic dioxin and low metal recovery rate of the existing waste circuit board treatment process.