Whole-Process Management and Intelligent Monitoring System for VOCs Emissions in Rubber Paste Preparation Workshops: Design, Implementation, and Field Validation
Industrial volatile organic compounds (VOCs) emissions are a major contributor to regional air pollution, and the rubber paste preparation process is a significant source. This study developed an intelligent monitoring system for whole-process VOCs management in a rubber paste preparation workshop, integrating software engineering and Internet of Things (IoT) technologies. The system architecture combines a hybrid database (MySQL relational and InfluxDB time-series), MQTT-based low-power wide-area communication, role-based access control, and containerized microservices. Field deployment at a large rubber enterprise enabled real-time monitoring of adsorption/desorption centrifugal fans and data fusion analysis. Under typical operating conditions, the extraction and ventilation systems achieved volume flow rates of 40,000 m³/h and 30,000 m³/h, respectively, maintaining a continuous micro-negative pressure environment that effectively suppressed fugitive emissions. The purification process, comprising zeolite rotor adsorption and regenerative thermal catalytic oxidation, reduced non-methane hydrocarbon (NMHC) concentrations to below 10 mg/m³, meeting the GB 27632—2011 emission standard. The system's multi-level permission management module precisely allocated operational responsibilities across production, environmental, and management roles, reducing response time to abnormal conditions. An online evaluation model for purification efficiency was constructed based on the actual process. The system demonstrates potential for extension to other high-VOCs industries such as coatings and printing. This research provides theoretical and practical references for applying computer technology to VOCs reduction and whole-process management in typical industries.