Detailed Explanation of Blast Furnace Injection Tank (Pulverized Coal Injection Tank) Technology
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Detailed Technical Explanation of Blast Furnace Injection Tank (Pulverized Coal Injection Tank)
The injection tank (also known as the pulverized coal injection tank) is the core pressure vessel of the blast furnace pulverized coal injection system, responsible for the storage, pressurization, fluidization, and quantitative transportation of pulverized coal. Its design and operation directly determine the stability and safety of the pulverized coal injection system. This article provides a comprehensive introduction from the aspects of structural composition, classification methods, working principles, key design points, and application characteristics.
I. Basic Structure and Equipment Attributes of the Injection Tank
(I) Core Components
As a typical internal pressure vessel, the structural design of the injection tank must comply with pressure vessel safety regulations. It mainly consists of the following components:
| Component Name | Function |
|---|---|
| Elliptical / Dish-Shaped Head | A standard head form for tank fabrication, it withstands internal pressure and disperses stress, offering better pressure resistance and material savings compared to flat heads. |
| Circular Straight Section | The main body of the tank, providing storage space for pulverized coal. The straight cylinder structure facilitates processing and welding. |
| Conical Bottom Head | Guides pulverized coal to concentrate at the bottom, working in conjunction with the fluidization device to achieve uniform output of pulverized coal and prevent accumulation. |
| Support Legs | Support the weight of the tank, fix its position, and ensure stable installation. |
| Manhole | Provides access for personnel to enter the tank for maintenance and cleaning, equipped with a sealing cover to ensure the tank's airtightness. |
| Safety Pressure Relief | A safety pressure relief device that automatically ruptures to release pressure when the internal pressure exceeds the design limit. |
(II) System Supporting Equipment
The injection tank must work in coordination with the following equipment to form a complete pulverized coal conveying system:
- Bell Valve: Installed at the tank's inlet and outlet to control the loading and discharge of pulverized coal, featuring good sealing and reliable opening and closing.
- Fluidization Device: Includes a fluidized bed (at the bottom of the tank) and fluidization nozzles (in the conical section), which introduce compressed air to put the pulverized coal into a "fluidized" state for easy transportation.
- Self-Mixer: Introduces secondary compressed air to enhance the mixing effect of pulverized coal and airflow, ensuring stable transportation to the injection lance.
- Pressure Equalization and Discharge Device: Mainly used in series tank configurations to balance the pressure between upper and lower tanks, enabling safe and rapid tank switching.
| Industry Category | Machinery |
|---|---|
| Product Category | |
| Brand: | 翔业 |
| Spec: | 10、15、20、30、40、50立方 |
| Stock: | 10 |
| Manufacturer: | |
| Origin: | China / Shandong / Rizhaoshi |
