11.2.3 Residual dust content
The maximum admissible residual dust content contained in the clean gas is indicated in TA-Air; inorganic dusts are divided in three special categories because of their toxicity.
Bag filters can have a residual dust content of 7 mg/m3 at most. The seams of the individual bags are a weak point as regards bag filtering. When these seams are agglutinated with polyester felt a value of 2 mg/m3 can be realised.
The residual dust content of a cartridge filter that can be achieved amounts to some 2 mg/m3.
- Table of contents
- 1. Fields of application of abrasive blasting technology
-
2. Blasting technology
- 2.1 Airless blast cleaning
-
2.2 Injection blasting
- 2.2.1 Compressed air blasting (also air blast cleaning or sand blasting)
- 2.2.2 Pressure blasting (injector blasting)
- 2.2.3 Vacuum-compressed-air blasting and vacuum injection blasting
- 2.2.4 Damp blasting
- 2.2.5 Wet blasting
- 2.2.6 Slurry blasting
- 2.2.7 Ice Blasting
- 2.2.8 Water- jetting cleaning and hydro-jetting
- 2.2.9 Wet blasting for fine surface treatment
- 2.2.10 Combination of different blasting methods
- 2.3 Laser cleaning
- 3. Abrasive
- 4. Efficiency assessment of abrasive blasting
- 5. Influence of compressed-air blasting on the surface of the workpiece
- 6. Generation of compressed air
-
7. Plants for compressed-air blasting
- 7.1 Small and medium-sized blasting pots
- 7.2 Large blasting pots
- 7.3 Double-chamber blasting pot
- 7.4 Mixing and dosing valve
- 7.5 Hoses, lengths of hoses, couplings
- 7.6 Selection of a blasting pot in considering the wear and tear behaviour
- 7.7 Increased wear and tear at the blasting pot caused by wrong adjustment
- 8. Remote control and emergency shut-downs
- 9. Jet nozzles
- 10. Stationary blasting halls
- 11. Mobile abrasive blasting equipment
- 12. Laws and provisions