Advantages and disadvantages of comprehensive sewage treatment equipment

What is the material of comprehensive sewage treatment equipment in general? The application of comprehensive sewage treatment equipment is more and more extensive, and various sewage treatment equipment has been customized according to the market demand of customers. At present, the comprehensive sewage treatment equipment on the market is mainly divided into three types of materials: glass fiber, carbon steel, and stainless steel. The advantages and disadvantages of several comprehensive sewage treatment equipment materials are described in detail below. Glass fiber material integrated sewage treatment equipment FRP integrated sewage treatment equipment: The advantages of comprehensive sewage treatment equipment using glass fiber materials are light and high strength: the relative density of glass fiber reinforced plastic is between 1.5 and 2.0, which is only 1 to 4 to 1 of carbon steel ~5, but the tensile strength is close to or even higher than that of carbon steel, and its specific strength is comparable to that of alloy steel. Therefore, it has achieved remarkable results in aviation, rockets, spacecraft, high-pressure vessels and other products that require weight reduction. The tensile, bending and compressive strength of some epoxy FRP can reach more than 400 MPa. Corrosion resistance: FRP is a good corrosion-resistant material, with good resistance to atmosphere, water, acid and alkali, salt, and various oils and solvents. It has been applied to various aspects of chemical anticorrosion, and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc. Good electrical properties: it is an excellent insulating material for making insulating bodies. Good dielectric properties are still protected at high frequencies. It has good microwave permeability and has been widely used in radomes. Good thermal performance: FRP has low thermal conductivity, 1.25-1.67 kJ/(m.h.k) at room temperature, only 1/100-1/1000 of metal. This is a very good insulating material. It is an ideal material for thermal protection and anti-ablation at transient ultra-high temperatures. It can protect the spacecraft from the erosion of high-speed air currents at temperatures above 2,000 degrees Celsius. Good designability: Various structural products can be flexibly designed according to needs to meet the requirements of use, so that the product has good integrity. Materials that meet product performance can be fully selected, such as corrosion resistance, instantaneous high temperature resistance, high strength in a certain direction, and good dielectric properties. Excellent manufacturability: the main results are as follows: (1) The molding process can be flexibly selected according to the shape, technical requirements, usage and quantity of the product. (2) The process is simple, it can be formed at one time, and the economic effect is outstanding. It is especially suitable for products with complex shapes and less forming, and the process advantages are more prominent. Disadvantages of using FRP in comprehensive sewage treatment equipment: Low elastic modulus: The elastic modulus of glass fiber is twice that of wood, but 10 times smaller than steel (e=2.1×105), so it often feels uncomfortable in product structure. So hard and easy to deform. It can be made into a thin shell structure, a sandwich structure, or it can be made of materials such as high modulus fibers or steel bars. Poor long-term temperature resistance: Ordinary FRP cannot be used at high temperatures for a long time. The strength of general polyester FRP drops significantly above 50°C, generally below 100°C, and the strength of ordinary epoxy FRP drops significantly above 60°C. However, high temperature resistant resin can be selected so that its long-term working temperature is between 200°C and 300°C. Aging Phenomena: Aging is a common defect in plastics. FRP is no exception. It is easy to cause performance degradation under the influence of ultraviolet rays, sand, rain, snow, chemical media and mechanical stress. The low interlaminar shear strength is borne by the resin and therefore very low. By selecting the process and using the coupling agent, the bonding strength between the coatings can be improved. It is important to avoid interlayer shear in product design. Carbon steel integrated sewage treatment equipment: The advantages of carbon steel integrated sewage treatment equipment are low in price and easy to smelt. Carbon steel integrated sewage treatment equipment has high strength and can meet various use places. Simple processing, short cycle, good processing technology, short processing cycle performance Improvement (C%, heat treatment) Defects of carbon steel comprehensive sewage treatment equipment have poor corrosion resistance, and it is necessary to carry out heavy anti-corrosion treatment. Stainless steel integrated sewage treatment equipment: Advantages of stainless steel integrated sewage treatment equipment Corrosion resistance, high temperature resistance, general acid medium resistance, good heat resistance, high temperature oxidation resistance (heat resistance, no peeling) Stainless steel integrated sewage treatment equipment Defects of stainless steel integrated sewage treatment equipment The main reason is that the cost is high and the price is expensive; in addition, stainless steel is not resistant to corrosion by alkaline media.