Waste disposal process of waste incineration and sewage sludge incineration
Today mainly dry and quasi-dry methods, the separation efficiency of which is significantly better than the currently applicable limit values, are used in the field of waste incineration
In this, fabric filters play an important role in the overall process and, when used with sorbent mixtures, allow for simultaneous separation of acidic gas pollutants, unburnt aromatic compounds, dioxins and furans, heavy metals and dust.
Unlike waste, sewage sludge cannot be avoided - on the contrary. Better waste water purification naturally produces more sewage sludge. In the Federal Republic of Germany approx. 10-15% of communal sewage sludge is incinerated. It is frequently highly contaminated with substances which mainly get into the waste gas when treated thermally.
Usually sewage sludge incineration plants are equipped with multi-stage gas cleaning installations for separating dusts and acidic harmful gases and for reducing the amount of nitric oxides.
Waste disposal process of waste incineration
| 1 | Incineration plant | 2 | Reactor | 3 | Filter for reactor | 4 | Denox plant |
| 5 | Chimney | 6 | Natural gas | 7 | Heat exchanger | 8 | Ventilator |
| typical design data | Unit of measure | Waste incineration |
|---|---|---|
| Gas volume | m³/h | 60,000-100,000 |
| Gas temperature | °C | 140 - 180 |
| Type of dust | Fly ash | |
| Residual dust content | mg/m³ | < 10 |
| Raw gas dust content | g/m³ | 5 - 10 |
| Cleaning | online | |
| Filter medium | ||
| Explosion protected design | not necessary | |
| Sorbents | Calcium hydroxide, furnace coke, active carbon, sodium bicarbonate |
Waste disposal process of sewage sludge incineration
| 1 | Terminal | 2 | Silo | 3 | Chimney | 4 | Filter for reactor |
| 5 | Recirculating air fan | 6 | Heater battery | 7 | Waste gas from incineration plants | 8 | Reactor |
| 9 | Dust discharge | 10 | Receiver tank | 11 | Blow-through valve | 12 | Air dryer |
| typical design data | Unit of measure | Sewage sludge incineration |
|---|---|---|
| Gas volume | m³/h | 30,000-60,000 |
| Gas temperature | °C | 140 - 180 |
| Type of dust | Additive, fly ash reactor products | |
| Residual dust content | mg/m³ | < 10 |
| Raw gas dust content | g/m³ | 5 - 10 |
| Cleaning | online | |
| Filter medium | polyamid /polyacrylonitrile | |
| Explosion protected design | not necessary | |
| Sorbents | Calcium hydroxide, furnace coke, active carbon, sodium bicarbonate |
