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Gas Fired Coal Dryer with Low Emissions
1. Introduction
A gas fired coal dryer with low emissions is an eco-friendly thermal drying system that uses natural gas, liquefied petroleum gas (LPG), or industrial coal gas as its heat source. Engineered to satisfy stringent environmental standards, it integrates high-efficiency gas burners with advanced dust collection and gas-scrubbing systems. This dryer enables high-volume coal dewatering while drastically reducing carbon, sulfur, and particulate emissions.
2. Working Principle
The system operates through clean gas combustion and convective heat exchange:
Low-Emission Combustion: Clean gas fuel is burned in a low-$\text{NO}_x$ burner to generate a stable stream of clean, high-temperature combustion gas.
Thermal Convective Drying: Wet coal enters the rotating drum, where internal lifters shower it continuously through the hot gas stream, evaporating surface moisture rapidly.
Multi-Stage Exhaust Cleaning: Moisture-laden exhaust gas passes through a multi-stage cleaning system—typically combining cyclone separators, baghouse dust collectors, and wet scrubbers—to capture fine coal dust and neutralize trace gases before release.
3. Key Advantages
Low Environmental Impact: Uses clean gaseous fuel to minimize $\text{SO}_2$, $\text{NO}_x$, soot, and particulate matter ($\text{PM}$) emissions, ensuring compliance with strict environmental regulations.
High Thermal & Combustion Efficiency: Gas burners offer near-complete fuel combustion and rapid thermal response, reducing overall fuel consumption per ton of dried coal.
Clean & Uniform Product: Eliminates ash or unburned residue contamination from solid fuels, preserving the original quality and purity of the clean coal.
Precise Temperature Regulation: Modern gas burners permit fast, automated flame adjustment, optimizing heat input based on moisture levels and protecting coal from overheating.
4. Applications
Eco-Sensitive Coal Processing Plants: Dewatering washed coal and flotation concentrates near urban areas or strict environmental control zones.
Industrial Boiler Feed Preparation: Pre-drying high-moisture coal to boost firing efficiency and maintain low plant emissions.
Lignite & Sub-Bituminous Upgrading: Safely drying low-rank coals with precise thermal management and low emission profiles.
Briquetting & Coking Facilities: Preparing clean, low-moisture coal blends with strict environmental and product-purity targets.
Technical Specifications
Product Specs (m) |
Capacity(T/H) |
Main Motor Power |
Main Motor Mode1 |
Main Gearbox Model |
Ratio |
Weight (T) |
1.2x10m |
2.5 |
7.5 |
Y160M-R3 |
ZL50-16-1 |
13.5 |
|
1.5x12m |
3.3-4.9 |
10 |
Y160L-6B3 |
JZQ500-111-2F |
- |
18.9 |
1.5x15m |
4-6 |
18.5 |
Y200L-6 |
JZQ500-111-2F |
21 |
|
1.8x12m |
4-6 |
11 |
Y200L-6 |
ZQ50-1611-2 |
16.46 |
22.33 |
2.2x12m |
7-12 |
18.5 |
Y160L-6 |
JZQ650-111 |
31.5 |
37.6 |
2.2x14m |
7-12 |
18.5 |
Y160L-6 |
JZQ750-111 |
31.5 |
40 |
2.2x16m |
12 |
30 |
Y225M-6 |
JZQ750-11 |
31.5 |
45 |
2.4x14m |
12 |
30 |
Y250M-6 |
JZQ750-111 |
31.5 |
51 |
2.4x18m |
10-13 |
37 |
Y250M-6 |
ZL85-13-1 |
27.16 |
54 |
2.4x20m |
10-14 |
37 |
Y250M-6 |
ZL85-13-1 |
27.16 |
54.14 |
3x20m |
25 |
55 |
Y250M-4 |
ZL100-16-1 |
41.52 |
78 |
3x25m |
32-36 |
75 |
YR280M-4 |
ZL100-16-1 |
41.52 |
104.9 |
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