In steel industries Blast furnaces have a key role in smelting iron ore together with fuel (coke) and flux (limestone) continuously supplied from the top of the furnace. Hot blast air with oxygen enrichment is blown into the lower section of the furnace through a series of pipes (tuyeres). This results in chemical reactions while material falls downward in the furnace.
BLAST FURNACE GAS FLOW MEASUREMENT IN STEEL PLANT :
Flue gas ( Blast furnace gas) a low calorie will exit from the top of the furnace which in turn is used in other low heating furnaces in other steel processes. Blast furnace gas typically consists of mainly N2(50-55%), CO (20-25%), CO2(16-18%) etc. It contains some moisture content and carbon particle dirt sticky in nature but cleanable.
Leomi provides a Leomi-586 Insertion Thermal Mass flowmeter which works excellent in these demanding applications against existing Orifice Or Averaging Pitot tube-based DP type flow transmitters.
The major advantage of Insertion Thermal Mass flowmeter in this application:
- Measures too low velocity of 0.6m/s or less & No pressure drop
- Easy installation in minimum time for large pipe diameter
- Easily removable sensor probe for periodic cleaning when needed
A major limitation of existing DP-type Flow meter in use:
- Significant pressure drop limits low flow range measurement
- Difficult to install and also time-consuming with the high initial cost
- Non-removable design is difficult for such application
