Pneumatic conveying of refractory materials
pneumatic conveyingIt is a method of using airflow to quickly flow in a closed pipeline and transport materials along the direction of the airflow to the endpoint.
It mainly utilizes the energy of airflow to transport granular materials along the direction of airflow in a closed pipeline. It is a specific application of fluidization technology. The pneumatic conveying device has a simple structure and is easy to operate, and can be used for horizontal, vertical, or inclined conveying.
With the development of industrial technology and the increasing demand for environmental protection, the level of equipment automation is constantly improving. The application of pneumatic conveying systems in the refractory materials industry is becoming increasingly widespread. In the past, powder raw materials were processed in the front-end process and manually poured and weighed. High labor costs and poor production environment make it easy for human errors to occur, resulting in substandard products. Mechanical transportation is used, but due to the high amount of secondary dust and frequent equipment failures, safety and reliability cannot be guaranteed. Most of the dust pollution in the production process comes from the powder conveying process, and the dust removal system cannot carry out centralized recovery. Pneumatic conveying ensures that the powder is transported in closed equipment and pipelines, and the dust is collected. At the place where the dust is generated, it is centrally filtered and discharged. According to the density of the dust in the pipeline, it ensures that the emission standards set by the environmental protection department are met.
Pneumatic conveying can be divided into dilute phase conveying and dense phase conveying. The gas velocity during dilute phase transportation operation is relatively high. The system is equipped with necessary gasification devices, gas mixing devices, dust removal and filtration devices, fans, feeders, Venturi tubes, auxiliary air tubes, and automatic control systems. The solid gas ratio is greater than that of dense phase transportation. The working gas flow rate is low and the pressure is high. The dense phase conveying system is driven by compressed air and the core component is the silo pump. The system is equipped with necessary gasification devices, fluidization devices, gas tracing pipes, gas pulse devices, Venturi tube devices, auxiliary gas pipes, and automatic control devices. The main equipment for pneumatic conveying includes rotary feeders, Roots blowers, low-pressure continuous conveying pumps, lower guide bin pumps, upper guide bin pumps, vacuum feeders, etc. The auxiliary equipment includes top dust collectors, centralized dust removal systems, star feeders, screw conveyors, arch breaking devices (air hammers, silo gasification plates), powder silos, discharge valves, diversion valves, pipelines, air compressors, etc. The specific configuration needs to be determined according to the process flow and production scale.
Shandong Juheng Environmental Protection Equipment Co., Ltd. has 13 years of experience in the pneumatic conveying industry. The designed pneumatic conveying system has the characteristics of stable operation and high conveying efficiency.