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The design uses a cheap and practical plastic pipe to carry out sewage drainage, rather than the traditional concrete pipe or pipe. According to the market and material properties, the final choice of PVC resin as raw material, manufacturing PVC-U double wall corrugated pipe. The stiffness of the grade is 4KPa, the nominal Diameter 160mm, the length 3M, the wall thickness is 4mm.
In the formulation design, the ingredient has the resin, the heat stabilizer, the lubricant, the filler, the processing modifier and the impact modifier. On the basis of synthetic consideration of the viscosity, molecular weight and degree of polymerization, the model of suspension production is PVC-SG5. Due to the heat sensitivity of PVC resin, choose the tribasic lead sulfate, dibasic phosphite lead, stearic acid, lead and barium stearate, they were mixed, so that its thermal stability is better. The lubricant chooses stearic acid, and the modified agent is copolymer ACR of methyl methacrylate and acrylate. CPE with chlorinated polyethylene (36% CL) as impact modifier formula. The ingredients of the fillers are light calcium carbonate.
The technology of this scheme is made of twin screw extruder. Throughout the production process, experienced the material drying, metering transport, mixing, extrusion, cooling stereotypes, cutting, packaging and other processes. In the extrusion molding, the screw diameter, the ratio of the screw diameter, the depth of the screw groove, the ratio of the screw groove and the compression ratio were designed. The die parameter design of the die is also carried out, and the parameters of the die flat section, the inner diameter of the die, the diameter of the die, the diameter of the core, the ratio of drawing to the die, and the compression ratio of the die are determined. The design of the machine, the extrusion machine production capacity and die pressure drop calculation to verify the rationality of the design.
In determining the process and the need for the machine, according to the design requirements, the equipment selection and determine the number of. There are many different equipments and models, according to the requirements of production, market costs, technological requirements etc, choose the appropriate equipment.
In the material balance, as the entire production process, consider all aspects of loss or waste, calculation of each process in the material, and ultimately to determine initial production of each formulation components of the feeding amount, and expected losses, the calculation of the final product output. According to the actual product production capacity, design output, to design the factory to work system and workload, planning good every hour, every shift and every day of factory production capacity.
In the energy balance calculation, the energy consumption of each part of the equipment is calculated, and the power consumption and water consumption of the process can be calculated.
In the design of the non process, according to the design of the production process and equipment reference, the preparation of staff to meet the production needs of human labor resources. The practical water supply problem of the factory is analyzed and considered.. At the same time, pay attention to environmental protection projects, compiling requirements for waste treatment.
Economic accounting to meet the production requirements of the premise to minimize the cost of the target, to raw material costs, packaging costs, depreciation of equipment, plant installation fees, utilities, wages, cost, management fees, profits, taxes, and the product sales price for the calculation of planning.
Workshop layout, in after a large number of process design of books and data reading reference under considering plant design and experience of recommendation and design rationality, on plant and equipment is designed.
目 录
1绪论 - 1 -
1.1文献综述 - 1 -
1.1.1 埋地排污管的发展背景 - 1 -