filter bag type induction furnace dust collector
The difficulty of the medium frequency furnace dust remove:
1, Flue gas temperature high.
The furnace in normal condition ,when the feeding mouth mix outside wind ,the flue gas temperature
≤200 ºC;when feeding not in time ,furnace empty ,bridging, suddenly flue gas temperature has risen
sharply ,up to 300ºC,This makes the gas transfer not easy,also make it difficult to remove dust from dry gas
2, more dust .
Small dust rate big .the furnace original flue gas(not include the outside wind and high temperature
expanding) dustiness is 10~14 g/m3,which can pass the 140 target screen accounted for 36%.
3, The flue gas contains acidic oxides and nitrogen oxides.
Both CO2 and NOX produced during the heating process are soluble in water,shows acidic.If you use
dry way cleaning, it can be emptied directly.if use wet way cleaning,Water is acidic,Corrosive equipment,
It is harmful to people, and it also pollutes the water quality and surrounding crops.
The flue gas composition
Main components of flue gas of medium frequency furnace
| Name |
CO |
CO2 |
NOx |
O2 |
H2 |
N2 |
| content(%) |
5~21 |
8~17 |
3~4ppm |
~1.8 |
1~3 |
68~76 |
Smoke concentration and composition
The initial concentration of soot was not measured,However, according to a large number of measured
results in China, the initial concentration of soot is 5000-6000mg/Nm3,The main components and contents
of smoke are as follows:
| components |
CaO |
Al2O3 |
MgO |
MnO |
Fe |
Combustible component |
| Weight content(%) |
3~6 |
2~4 |
1~3 |
1~2 |
12~16 |
20~50 |
Particle size distribution
Flue dust particle size distribution(%)
Particle size
type |
<5μm |
<10μm |
<20μm |
<50μm |
<100μm |
| Induction furnace |
2~20 |
5~25 |
10~30 |
20~50 |
40~65 |
System air volume determination
1.Estimation of furnace volume produced by heating process
The furnace gas produced by heating can be calculated according to the composition and its consumption,
the flux and its consumption, the moisture in the air, the composition of the furnace gas, etc.
If only the N2, CO2 and CO 3 gases are calculated,The relationship between combustion ratio and furnace
volume can be obtained through combustion ratio.
The ratio between the amount of gas produced in the heating process and the air volume of the furnace
can be called the calculation coefficient of the gas volume.The numerical relationship between the heating
ratio and the calculation coefficient of the gas volume is shown in the table below.
The numerical relationship between heating ratio and calculation coefficient
| 0 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
| 1.21 |
1.17 |
1.14 |
1.11 |
1.09 |
1.07 |
1.05 |
1.04 |
1.02 |
1.01 |
1.00 |
induction dust remove blowing volume
| No |
Name |
Unit |
Data |
| 1 |
intermediate frequency furnace |
T |
≤0.5 |
1 |
2 |
4 |
6 |
8 |
10 |
20 |
| 2 |
Flue gas throughput |
Nm/h |
≤1500 |
3000 |
6000 |
12000 |
18000 |
24000 |
30000 |
60000 |
| 3 |
alkali consumption |
T/h |
0.15 |
0.3 |
0.6 |
1.2 |
1.8 |
2.5 |
3 |
6 |
| 4 |
Lye pressure |
MPa |
≥0.15 |
Introduction of dust bag holder
The dust removal skeleton is one of the indispensable parts of bag filter,it's effect is big and be widely used
in metallurgy, chemical, coking, power generation, non-ferrous smelting, steel, building materials, coal and
other industries.
According to this scrubber ,the bag holder details as fllow :
| Name |
Dust removal bag holder |
| Size |
According to customer requirement |
| Surface |
Galvanized or painting |
| Steel rod QTY |
8pcs or 12pcs |
| Ring distance |
200mm |
Dust removal bag details
| bag |
|
|
| Filter bag material |
|
Polyester needled felt |
| Bag size |
mm |
According to customers requirement |
| Bag weight /m2 |
g |
According to customers requirement |
Electromagnetic pulse valve
Electromagnetic pulse valve: refers to the combination of solenoid valve, pilot valve and pulse valve, a kind
of diaphragm valve that directly controlled by electric signal
Function of the electromagnetic pulse valve
To control the oil pressure of the oil line .Generally installed in main oil line or shock absorber back pressure
oil line,To reduce the oil pressure impact when changing gear and locking,Keep the equipment running
smoothly.
Discharger
The discharging device is the main equipment for discharging the ash, air supply and other equipment of
the dust removal , which is suitable for powder materials and making shapes materials
cyclone
It's a kind of dust removal device.The dust removal mechanism is to make the dust do Rotary motion.,The
dust particles are separated from the flow by centrifugal force and collected on the wall.,The dust particles
fall into the dust bowl with the help of gravity.All parts of the cyclone dust collector have a certain size ratio,
The change in each proportional relationship,All can affect the efficiency and pressure loss of cyclone dust
collector.,The diameter of the dust catcher, the inlet size and the diameter of the exhaust pipe are the main
factors.It should be noted in use that the advantage can be turned into a disadvantage when it exceeds a
certain threshold.
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