The process requirements of the reactor usually include the volume of the reactor, the large working pressure of the zui, the working temperature, the working medium and corrosion, the heat transfer area, the agitation form, the rotational speed and power, and the fitting of those nozzles. These requirements are generally reflected in the form and schematic form of the equipment design requirements presented by the process department.
To carry out the mechanical design of the reactor, it is first necessary to analyze and study the contents of the design requirements. Generally, pressure, temperature, and dielectric corrosion are the main factors considered in the mechanical design of the reactor. In general, stress is the main contradiction in equipment design. It often determines the material selection, structure and shape of the equipment. Therefore, it must be considered first. However, if the operating temperature is above 200 ° C or below -40 ° C, then the temperature is often decisive for the determination of materials and structures. When the working medium has a strong corrosive effect on the material or prevents the equipment material from having specific requirements for the contamination of the reactive material, the choice of the anti-corrosion material may be converted into a major contradiction. Of course, in the mechanical design of the reactor, while grasping the main contradictions in the process requirements, we must also take into account other requirements such as mixing, transmission and sealing, and give consideration to the possibility of manufacturing and the rationality of the structure. Considering.
According to the requirements of the process design, the following items are generally included:
(1) Determining the structural type and size of the reactor According to the process requirements, according to the volume and weight of the material, the characteristics of the reaction, the form of heat transfer, and the requirements for installation and maintenance, determine the structural type and dimensions of the reactor, such as the cylinder. The diameter and height, the choice of the shape of the head, etc. This item is often determined by the process design basis. In the mechanical design, it is necessary to check whether the conditions of the process are met according to the mechanical design results.
(2) Select materials According to the working conditions of each part, the pressure, temperature, chemical corrosion and other conditions, the manufacturing method of the parts to be prepared, as well as the material supply and economic durability, select the materials of each part.
(3) Strength calculation According to the structural type of the part, the stress conditions and the mechanical properties and corrosion of the material, the strength calculation is performed to determine the structural size. For example, the reactor body, the wall thickness of the head, and the diameter of the stirring shaft are determined.
(4) Selection of parts, reactors, stirring, transmission, sealing and other components, and most of the components have been standardized. therefore. The components for the reactor can be selected according to the process conditions, manufacturing, installation and other factors.
(5) The drawing reactor and its parts are drawn into various drawings, such as the general assembly drawing, the component drawing, the part drawing, etc., for application in manufacturing assembly and maintenance inspection.
(6) Put forward technical requirements to propose technical requirements for manufacturing, assembly, inspection and commissioning. These requirements are generally expressed in words on the drawing, and when there is more content, technical documents, design specifications, etc. can be edited.
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