Corrosion-resistant manhole cover hinge of sewage treatment pool
With the acceleration of China's industrialization, sewage treatment facilities as an important part of urban infrastructure have been paid more and more attention. Corrosion resistance is a key problem in sewage treatment equipment. This paper will focus on the design, material and application of manhole cover hinge for anti-corrosion sewage treatment pool.
1. Design requirements:
In the design, the first thing to consider is the possible chemical composition in sewage and its influence on metal materials, and choose the appropriate material to ensure the hinge has good corrosion resistance. At the same time, it is necessary to comprehensively evaluate and design the bearing capacity and installation location to ensure that it will not be deformed or damaged during long-term use. In addition, the convenience and safety of operation should be fully considered, such as setting a locking mechanism to prevent accidental opening.
2. Material selection:
At present, there are several types of products commonly used in the market, such as cast iron, stainless steel and plastic. Among them, stainless steel is widely used in various harsh environments because of its excellent mechanical strength and acid and alkali corrosion resistance; Although the cost of plastic products is low, they are easy to age and become brittle and lose their original luster; Although the price of cast iron is moderate and the processing is simple, there are some problems such as heavy weight and inconvenient handling. Therefore, it is suggested to use 304 or 316 series high-quality stainless steel iron materials to manufacture this product, and improve the surface hardness and toughness through heat treatment process to prolong the service life.
3. Application case:
A petrochemical plant has newly built a wastewater project with a daily treatment capacity of 10,000 tons, which contains a large amount of sulfide gas and strong acid and alkali substances, causing serious erosion on the joints of pipelines and valves, resulting in frequent leakage accidents. After transformation, a new type of composite hinge structure with high temperature and humidity resistance was adopted to replace the traditional fixed flange connection, which successfully solved this problem. Practice has proved that this method is economical and practical, which greatly improves the overall operation efficiency and stability.
In short, when selecting and using the hinge of the manhole cover of the anti-corrosion sewage treatment tank, we must strictly abide by the relevant specifications and standards, reasonably select the types and specifications of materials, and regularly check and maintain them, so as to effectively avoid all kinds of losses caused by equipment failure.
Rec. Prods.
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