Titanium material is excellent in corrosion resistance, especially the Titanium-pladium Alloy Gr7, it is excellent corrosion resistance in the solution of HCl, H₂SO₄ and H₃PO₄.
In the acid regeneration process of steel mills, Titanium venturi serves as a pre concentrator, pump the waste acid from the pickling unit to the top of the titanium venturi for spraying. It undergoes direct heat exchange with the furnace gas from the combustion furnace (395 ℃), evaporates some of the water in the waste acid, and the waste acid is concentrated. The concentrated waste acid is sent to the top of the roasting furnace through the feeding pump filter station of the roasting furnace and then enters the roasting furnace for spraying through the spray rod, filter screen, and nozzle, There are two burners on the roasting furnace body for heating, which evaporate, dry, crystallize, and decompose concentrated acid sprayed into the furnace.
The decomposed Fe₂O₃ solid particles fall into the lower cone of the roasting furnace in the form of powder, are discharged by a crusher and a rotary valve, and are transported to the iron powder silo by a pneumatic conveying system. Install an absorption tower on the upper part of the silo for spraying, so that all acid containing cleaning water is recycled and the exhaust gas meets the emission standards.
|Number of devices||1 set|
|Equipment function||Use the heat of the reaction gas of the roaster to heat the waste acid from the pickling line to increase the concentration of waste acid and reduce the dust content in the flue gas.|
|Structure||One-piece structure, using four nozzles to feed acid along the tangential direction around it.|
|Advantages||Simple and reasonable structure, short manufacturing cycle, convenient installation, stable operation, and convenient long-term maintenance|
|Liquid phase||Concentrated waste acid (composition: HCl-50-170g/l, FeCl₂-350-410g/l, FeCl₃-30-70g/l, 95°C-100°C)|
Combustion exhaust gas (including: HCL steam, water vapor, nitrogen, carbon dioxide, a small amount of oxygen);
Iron oxide powder. Import: 380°C-460°C, Export: 83°C-95°C
|Main parameters and materials|
|Housing||Titanium-pladium Alloy Gr7|
|Immersion tube||Titanium-pladium Alloy Gr7|
Equipment Quantity: 3 sets
Equipment function: It is used to spray the waste acid concentrated by the pre-concentrator
into the roaster.
The main parameters:
Nozzle tube Length -- about 3170mm
Nozzle tube diameter--ø33/ø52mm
Nozzle tube pressure-460-500 Kpa
Nozzle tube hose--DN25, L=2600mm
Nozzle plate diameter--ø152mm
Nozzle flow--3.5l/min (0.4Mpa)
Number of nozzles--11-13/Nozzle tube
Nozzle tube--Titanium Palladium Alloy/Niobium
Nozzle tube hose--EPDM/stainless steel wire mesh/PTFE
Nozzle plate - titanium palladium alloy/niobium
Nozzle tube casing—Titanium Gr7
Filter holder--titanium palladium alloy/niobium
Number of devices
It is used to separate the Fe₂O₃ particles in the reaction gas of the
Roaster and send them back to the roaster. Imported flue gas velocity
Used to wash the participating HCl and Fe₂O₃ in the flue gas.