Centered around the concept of environmental protection, Xiangye Company exquisitely showcases the unique charm of the injection tank.

The injection tank, also known as the pulverized coal injection tank, is a typical example of an internal pressure vessel. Its structure is ingeniously composed of elliptical or dished heads, a cylindrical straight section, a conical lower head, supports, manholes, and other components. While adhering to standard design specifications, its design pressure must be adjusted according to actual working conditions. Particularly when injecting bituminous coal, the design pressure needs to be appropriately increased to ensure safety.

The injection system is constructed from various types of injection tank groups, along with bell valves, fluidization devices, and other components. Here, the process of pulverized coal injection resembles a meticulously choreographed dance. Within the injection tank group, compressed air is introduced, and secondary compressed air is added through a self-mixer, allowing the pulverized coal to be precisely injected into the blast furnace tuyere via pipelines and lances.

It is worth mentioning that the arrangement of the injection tank groups is quite ingenious. They can be arranged in parallel, with coal loading and injection alternating like dancers taking turns on stage. Alternatively, they can be arranged in an overlapping manner, where the bottom tank is dedicated to injection, while the task of coal loading is handled by the upper tank and its pressure equalization and discharge devices. This design considers both efficiency and operational safety.

At the bottom of the injection tank, a fluidized bed is installed, while fluidization nozzles are mounted on the conical section of the lower part of the tank. Both are connected to the fluidization gas source via control valves. Through the agitation provided by the fluidization nozzles, the transport performance of the powder within the injection tank is significantly improved, and the fluidization effect is optimized. This innovation is not only applicable to newly built injection systems but also provides new ideas for the modification of existing systems.

The arrangement of injection tanks exhibits both the beauty of a single series, like tandem tanks, and the orderly yet varied layout of multiple series. The injection methods are divided into direct and indirect types. The direct injection method is like a waterfall shooting straight into the sky, delivering pulverized coal directly into the blast furnace. In contrast, the indirect injection method resembles a meandering stream, transporting prepared pulverized coal to the injection station near the blast furnace via dedicated pipelines or tankers. The contrast and integration of these two methods create a dynamic melody, playing a captivating movement on Xiangye Company's production line.

When it comes to the layout of injection tanks, it is particularly distinctive. The alternating use of parallel injection and tandem tank injection is like dancers flexibly changing formations on stage. To ensure uninterrupted pulverized coal injection for the blast furnace, the sequential or cross-switching of tanks becomes a daily "dance move." This design not only considers production continuity but also accounts for the ability to handle potential injection accidents.

This innovation by Xiangye Company not only saves investment but also greatly enhances the stability and efficiency of injection. Although parallel injection requires more floor space, its weighing process is simple, and the investment is relatively small, making it widely used in direct injection systems for small blast furnaces. Regardless of the method, both showcase unique charm through Xiangye Company's ingenious design.

This is the story of the injection tank as presented by Xiangye Company—a tale full of wisdom and ingenuity.