Papers by Keyword: Zero Emission

Abstract: This article uses the mathematics method to study in view of boiler zero pollution discharge automatic dosing control and other aspects during the dosing control system model parameter is a variable instead of a constant. If the solution density changes, the object characteristic also along with the change, When the system load will change, can cause for the discharge of water changes, examines the PH value also can change along with it, will cause the controlled member model also correspondingly to change. Because the steam system heat supply pipeline has grown, a successful Canadian medicine circulation needs several minute perhaps several dozens minutes, overall system existence serious lag flaw. In view of the above, we used DDCSRD 3211B dosing system control system to eliminate hysteresis to ensure proper, efficient, energy-saving operation of steam boilers. Zero-effluent dosing system from steam to prevent pollution at the source, the boiler system to environmental decline in the discharge of sewage to zero or close to zero.[

Abstract: The feasibility of recycling machining grindings of aluminum alloys by semisolid process has been investigated. Machining grindings of A2011 aluminum alloy produced experimentally by lathe machining were used. The material is put into a metal mold and compressed up to 90 % of the true density at room temperature. The metal mold with the compressed machining grindings is heated up to a specified temperature. Afterwards, the metal mold is set into the extrusion container, and extrusion in hot and semisolid range was carried out. In this experimental study, extrusion load, internal structure of the product and mechanical properties (tensile strength, elongation, hardness) of the product are assessed. It was proven that semisolid extrusion is about 40% less extrusion load compared with that of hot extrusion, the shape of the machining grindings remained in the hot extrusion and the semisolid extrusion products extrusion ratios higher than 10 have excellent elongation property, which is comparable to the commercialized product.