injection tank

Centering on the concept of environmental protection, Xiangye Company has exquisitely showcased the unique charm of the injection tank.

The injection tank, also known as the pulverized coal injection tank, is a typical internal pressure vessel. Its structure is ingeniously composed of parts such as elliptical or dish-shaped heads, circular straight sections, conical lower heads, supports, and manholes. While following standardized design, its design pressure needs to be adjusted according to actual working conditions. Especially when injecting bituminous coal, the design pressure needs to be appropriately increased to ensure safety.

The injection system is jointly constructed by different forms of injection tank groups, bell valves, fluidization devices and other components. Here, the pulverized coal injection process is like a carefully choreographed dance. Compressed air is filled into the injection tank group, and then secondary compressed air is introduced through a self-mixer to accurately inject the pulverized coal into the blast furnace tuyere through pipelines and lances.

It is worth mentioning that the arrangement of the injection tank group is quite ingenious. They can be arranged side by side, with coal charging and coal injection alternating, like dancers taking turns to perform on stage; or they can be arranged in an overlapping manner, where the bottom tank is dedicated to injection, and the task of coal charging is completed by the upper tank and its pressure equalization and discharge device. This design takes into account both efficiency and operational safety.

At the bottom of the injection tank, a fluidized bed is installed; and on the conical section at the lower part of the tank body, fluidization nozzles are installed. Both are connected to the fluidization gas source through control valves. Through the agitation effect of the fluidization nozzles, the conveying performance of the powder in the injection tank has been greatly improved, and the fluidization effect has also been optimized. This innovation is not only applicable to new injection systems, but also provides new ideas for the transformation of existing systems.

The arrangement of the injection tanks has both the beauty of a single series like a tank string and the well-arranged layout of multiple series. The injection methods are divided into direct and indirect types. The direct injection method is like a waterfall rushing straight into the sky, sending pulverized coal directly into the blast furnace; while the indirect injection method is like a meandering stream, transporting the prepared pulverized coal to the injection station near the blast furnace through special pipelines or tank trucks. The contrast and integration of these two methods, like a dancing melody, play a moving movement on Xiangye Company's production line.

When it comes to the layout form of the injection tanks, it is even more unique. The alternating use of side-by-side injection and tank-string injection is like dancers flexibly changing formations on the stage. To ensure the uninterrupted coal injection operation of the blast furnace, the sequential switching or cross-switching of the tanks has become a daily "dance move". This design not only considers the continuity of production, but also takes into account the ability to handle possible injection accidents.

This innovation from Xiangye Company saves investment while greatly improving the stability and efficiency of injection. Although side-by-side injection occupies a larger area, its injection weighing is simple and the investment is relatively small, so it has been widely used in direct injection process systems for small blast furnaces. No matter which method is used, it shows unique charm in the ingenious design of Xiangye Company.

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