Fluidizer classification
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Main Types and Structural Characteristics of Blowing Tank Fluidizers
Based on the form of the fluidizing element, installation position, and fluidization effect, blowing tank fluidizers are mainly divided into the following three categories, suitable for different coal injection volumes, pulverized coal characteristics (such as particle size and humidity), and blowing tank structures:
| Type | Core Structure | Fluidization Characteristics | Advantages | Disadvantages | Applicable Scenarios |
|---|---|---|---|---|---|
| Bottom Fluidizer | Tank bottom air chamber, porous fluidizing plate (or permeable brick), annular air distribution pipe | Fluidizing gas permeates uniformly upward from the bottom of the blowing tank, acting on the entire pulverized coal accumulation layer to achieve "overall fluidization". | Wide fluidization range and good uniformity; suitable for large-volume blowing tanks. | Installation and maintenance require entering the tank, making operations complex; if the pulverized coal has high moisture content, it is prone to clogging the fluidizing plate pores. | Medium to large blast furnace coal injection systems (coal injection volume ≥150kg/t iron), large-capacity blowing tanks (volume ≥10m³). |
| Side Fluidizer | Side-mounted air chamber on the tank wall,扇形 fluidizing element (metal/ceramic material), air inlet pipe | Fluidizing gas is injected horizontally from the middle and lower part of the tank wall, disturbing local pulverized coal, breaking bridging, and assisting in coal powder descent. | Easy installation and maintenance (no need to enter the tank); specifically addresses bridging issues near the tank wall. | Limited fluidization range, requires multiple symmetrical arrangements; poor uniformity when used alone. | Small to medium blowing tanks, working conditions prone to pulverized coal bridging; often used in combination with bottom fluidizers. |
| Combined Fluidizer | Bottom porous plate + side扇形 element + top loosening nozzle | Bottom achieves overall fluidization, side breaks local bridging, top gas loosens upper pulverized coal, forming "three-dimensional fluidization". | Optimal fluidization effect, balancing uniformity and anti-clogging; adaptable to complex pulverized coal characteristics. | Complex structure and higher cost; requires coordinated control of multiple air sources for airflow parameters. | High coal injection volume systems, working conditions with fluctuating coal humidity/particle size; large blast furnaces with extremely high requirements for injection stability. |
The blowing tank fluidizer is the core device in the blast furnace coal injection system that "transforms static pulverized coal into a dynamic fluidized material flow". Its performance directly determines the stability of the coal injection volume and the smooth operation of the blast furnace. During selection, it is necessary to consider the blowing tank specifications, pulverized coal characteristics, and process requirements, prioritizing combined fluidizers to balance uniformity and anti-clogging. In daily operation, it is essential to monitor airflow parameters and the condition of fluidizing elements closely, promptly addressing issues such as clogging and leakage. In the future, intelligence, energy efficiency, and modularity will become the main development directions for fluidizers, providing more reliable technical support for steel plants to achieve efficient coal injection.
| Industry Category | Machinery |
|---|---|
| Product Category | |
| Brand: | 蓝昊 |
| Spec: | DN600-2500 |
| Stock: | 10000 |
| Manufacturer: | |
| Origin: | China / Shandong / Rizhaoshi |
