{"id":52435,"date":"2026-09-14T08:03:53","date_gmt":"2026-09-14T06:03:53","guid":{"rendered":"https:\/\/blog.wika.com\/en\/?p=52435"},"modified":"2026-09-14T08:03:53","modified_gmt":"2026-09-14T06:03:53","slug":"predictive-maintenance-of-agitators-in-chemical-reactors","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/en\/applications\/predictive-maintenance-of-agitators-in-chemical-reactors\/","title":{"rendered":"Predictive maintenance of agitators in chemical reactors"},"content":{"rendered":"

Continuous stirred tank reactors (CSTRs) are widely used in the chemical industry. Their agitator systems are susceptible to mechanical faults, which can lead to unplanned downtime during operation. The Rotating Machinery Manager from WIKA is an IIoT solution for condition monitoring and predictive maintenance of rotating equipment. A chemical company used it to prevent major damage to one of its continuous stirred tank reactors.<\/strong><\/p>\n

A continuous stirred tank reactor provides a stable and homogeneous reaction environment. Feedstocks are continuously introduced and mixed by constant agitation while the reaction product is withdrawn at the same time. At the heart of the process is a mechanical agitation system, typically driven by an electric motor. This motor drives a central shaft connected to impellers that thoroughly mix the reactants and maintain consistent process conditions throughout the reactor.<\/span><\/p>\n

Typical applications: Fermentation and chemical synthesis<\/span><\/h2>\n

Reliable operation of the motor and agitator is essential, especially in sensitive applications such as fermentation and chemical synthesis. In fermentation, effective mixing is required to supply microorganisms evenly with nutrients and oxygen \u2013 a prerequisite for their growth and optimal product yield. In chemical synthesis, uniform agitation is important so that temperature and component concentrations remain consistent throughout the reactor. Only under these conditions can the reaction rate be controlled and product quality assured.<\/span><\/p>\n

Challenges and risks during operation<\/span><\/h2>\n

The agitator system therefore plays an important role in the process. However, its mechanical components are susceptible to faults, posing a potential source of failure. High-viscosity media or mixtures with a high solids content can, for example, overload the motor and potentially lead to equipment failure. Shaft misalignment can result in vibration, noise and accelerated bearing wear. In continuous stirred tank reactors \u2013 particularly in pressurised systems \u2013 there is also a safety and contamination risk due to the possibility of seal leakage. If such faults lead to poor mixing and, consequently, incomplete reactions, this results in costly downtime.<\/span><\/p>\n

The solution: Smart condition monitoring with IIoT<\/span><\/h2>\n

A chemical company operating a series of continuous stirred tank reactors for the production of specialty chemical intermediates sought a solution to these challenges \u2013 and implemented the Rotating Machinery Manager from WIKA. This modern IIoT solution was developed for condition monitoring and predictive maintenance of rotating equipment. Its core component is a multisensor probe that measures vibration, ultrasound and temperature. It is certified for hazardous areas, operates wirelessly via LoRaWAN\u00ae and offers a long battery life. The instrument collects data from the<\/p>\n

measuring points in the plant and transmits them to a central dashboard. On this dashboard, the operator can continuously monitor the operating state of the reactors remotely. Thanks to the integrated AI engine, potential causes of failures can also be detected and addressed at an early stage.<\/p>\n

The Rotating Machinery Manager from WIKA detects signs of mechanical faults such as bearing wear, insufficient lubrication, overheating, cavitation and misalignment. It gains these insights using edge computing to process complex sensor data as well as AI-based analytics that detect anomalies and indicate likely root causes. This information allows maintenance teams to act early, minimising unplanned downtime and extending the service life of the equipment.<\/p>\n

Success story: Major damage avoided<\/span><\/h2>\n

The new monitoring solution quickly proved its effectiveness for the chemical company. During ongoing operation, the bottom bushing inside a continuous stirred tank reactor showed signs of advanced wear. The Rotating Machinery Manager detected the anomaly and issued an early warning. Thanks to this warning, the maintenance team shut down the reactor. This prevented the situation from escalating to the point where the upper mechanical seal \u2013 a more critical and costly component \u2013 would have been affected.<\/p>\n

When the warning appeared, the maintenance team responded immediately, stopped reactor operations over the weekend and inspected the plant. They found that the bottom bushing was severely damaged. The monitoring solution had correctly raised the alarm, thereby preventing an even more serious failure. If the Rotating Machinery Manager had been deployed earlier, the operator would have become aware of the fault even sooner. Then damage to the bushing could have even been avoided altogether. This highlights the enormous savings potential of effective predictive maintenance using IIoT.<\/p>\n

Benefits for operators of CSTRs<\/span> <\/span><\/h2>\n\n
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A multisensor probe captures precise measurement data and a digital analytics tool presents them clearly.<\/span><\/p><\/div>\n \n

The Rotating Machinery Manager offers operators of continuous stirred tank reactors several benefits. It does not require major interventions in the plant layout and is compatible with virtually any machine type and age. The wireless technology allows installation even in hazardous areas. The solution enables operators to remotely monitor the operating state of the reactors. Parameters can be adjusted without having to access the machinery in person. The benefits for operators are clear: reduced downtime, improved safety and compliance, optimised plant performance, higher energy efficiency and lower maintenance costs. <\/p>\n

The implementation of the Rotating Machinery Manager from WIKA includes the following project steps:<\/span><\/p>\n