【Haichuan Chemical Construction Project】Official Complete Specifications for Agitator Installation

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The 25th National \"Safety Production Month\" in 2026: Everyone talks about safety, and everyone knows how to handle emergencies; identifying and addressing potential risks and hazards. -------------------------------------------------- As a device widely used in the chemical industry, the mixer plays a crucial role in accelerating reactions, facilitating heat exchange, and mixing substances, making it indispensable. When the mixer is not installed properly, it causes severe wear of the lower sliding bearings, uneven loading on the upper rolling bearings, as well as abnormal noises, which accelerates the damage to the mixer. To improve the installation quality and service life of the mixer and reduce subsequent maintenance costs, I started by focusing on installation specifications to ensure high quality of installation. I have compiled the detailed installation technical requirements into a PDF version, which is stored on my Baidu Netdisk; the link is available at the bottom of the article. Its content is more comprehensive, and can serve as a basis for installation and maintenance. I. Preparatory work before mixer installation Before installing the mixer, the equipment foundation must be inspected and found to meet the requirements, with relevant records kept. The inspection items for all components of the mixer meet the requirements, ensuring they are suitable for installation. For example, the appearance and dimensions of the shaft, as well as its bending degree, should be measured and verified before installation. All kinds of installation tools and equipment, as well as the installation materials, are fully prepared and available, meeting all the installation requirements. II. Installation of the mixer: The installation of a vertical mixer includes the setup of the mixer frame, bearing housing, main shaft, bottom sliding bearings, mechanical seal, coupling, and other components. 2.1 When installing the mixer, the frame serves as an important supporting component; bearings are installed within it to bear the weight of the main shaft as well as the operational loads. It is necessary to control its levelness or verticality to ensure proper installation quality. At the same time, control its concentricity with the tank to ensure that the shaft does not experience uneven wear and that the end face of the mechanical seal remains intact. 2.2 When installing bearing components, they should be properly lubricated, and all clearance gaps must meet the requirements for bearing installation. 2.3 When installing the spindle, its axial position within the bearing assembly’s sleeve must be secure and fixed, and the tightening of the lock nut must meet the required standards. At the same time, the verticality meets the requirements. 2.4 When installing mechanical seals, it is necessary to strictly follow the manufacturer’s instructions to prevent dry rubbing of the end faces. 2.5 When installing the sliding bearings at the bottom of the mixer, it is necessary to determine its verticality and the coaxiality with the main shaft. 2.6 When installing the coupling, determine the installation method based on the nature of the fit to avoid damaging the bearings and the coupling due to forceful installation. III. Installation Notes: After each installation step of the mixer is completed, it is necessary to conduct strict inspections in accordance with the acceptance standards and record the relevant data. Only processes that have been inspected and approved can proceed to the next stage, with proper inspection of concealed works being carried out. When installing a vertical mixer, it is necessary to strictly control the perpendicularity between the main shaft and the tank or vertical vessel, in order to prevent severe wear of the bottom sliding bearings during operation, uneven loading on the upper bearings, and excessive noise.