Zhou Shengxian said that this year, the State Environmental Protection Administration will impose limits on production limits for enterprises that fail to meet environmental protection requirements, stop production for renovation, and shut down. Evaluate SO2 and COD emissions in 2008 for heavily polluting industries such as chemicals and paper, and other enterprises that exceed pollution emission standards, exceed total control targets, and produce or use toxic and hazardous substances. Decreased by 6% and 5%. For serious lakes with eutrophication, a batch of industrial construction projects that increase the total amount of nitrogen and phosphorus emissions are stopped in the whole basin. In particular, it is necessary to increase the environmental access threshold, strictly control the excessive growth of the “two high and one capital†industry, and stop the approval of construction projects for discharging heavy metals and persistent organic pollutants into rivers; the task of eliminating outdated production capacity has not been completed, and the environmental violations are serious and excessive. Areas with outstanding problems such as total control indexes and lagging construction of key pollution control projects must implement “regional limited approvalsâ€.
According to reports, since the “Eleventh Five-Year Planâ€, environmental protection work has achieved certain results, and relevant state departments have increased the environmental access requirements for 13 high-energy-consuming and high-emission industrial construction projects such as petrochemicals; 377 of the total investment is nearly 1.5 trillion yuan. The project made a decision not to approve or postpone the examination and approval; conducted a special inspection of environmental protection for more than 9,000 new projects in the country; and suspended construction, postponement, supplementation, and improvement measures for 1194 projects that did not meet the requirements of the environmental assessment. deal with.
From the perspective of the displacement direction of conveying materials, screw conveyors are divided into two types: horizontal screw conveyors and vertical screw conveyors. They are mainly used for horizontal conveying of various powder, granular and small pieces of loose materials. And vertical lifting, this machine is not suitable for conveying special materials that are easily deteriorated, viscous, easy to agglomerate or high temperature, afraid of pressure, and highly corrosive.
The screw conveyor has the advantages of simple structure, low production cost, strong sealing, safe and convenient operation, etc. It can be loaded and unloaded at multiple points in the middle. It is widely used in chemical, building materials, metallurgy, grain and other departments. When the inclination angle is β<20°, it can transport powdery, granular and small pieces of materials that are not viscous, not easy to deteriorate, and not easy to agglomerate.
The characteristics of the screw conveyor are: simple structure, small cross-sectional size, good sealing, reliable operation, low production cost, convenient intermediate loading and unloading, and the conveying direction can be reversed or conveyed in opposite directions. During the process, the materials can also be stirred, mixed, heated and cooled. The material flow can be adjusted through the loading and unloading gate. However, it is not suitable to convey materials that are perishable, viscous, easy to agglomerate and bulky. During the conveying process, the material is easily broken, and the screw and the trough are easily worn.
Spiral Conveyor,Small Spiral Conveyor,Spiral Screw Conveyor,Shaftless Spiral Conveyor
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