Nitrogen in coal, as an important element, produces nitrogen oxides upon combustion that severely pollute the atmosphere, easily form acid rain, and acidify the soil. Additionally, nitrites are significant carcinogens. In the power industry, the determination of nitrogen content in coal is used to calculate the heat of combustion, theoretical combustion temperature, composition of combustion products, and thermal balance.
Operating conditions for the semi-micro steam nitrogen determination apparatus:
(1) Temperature: 0-40°C
(2) Relative humidity: ≤80%
(3) Power supply: Voltage: 220±22V
Frequency: 50±0.5Hz
(4) Carrier gas: Helium, purity higher than 99.8%.
(5) Power: Not less than 4.5KW.
(6) No strong magnetic field interference
Basic parameters of the semi-micro steam nitrogen determination apparatus:
(1) Measurement range: 0.01－50%
(2) Sample amount: Approximately 100mg;
(3) Single determination time: Approximately 35 minutes;
(4) Rated power consumption: 4000W
Technical requirements for the semi-micro steam nitrogen determination apparatus:
(1) Repeatability (compliant with GB/T 19227-2008) ≤0.08%
(2) Temperature control accuracy: Set value ±10°C
(3) Temperature control range:
Hydrolysis furnace: Room temperature ~1200°C
Steam generation furnace: Room temperature ~500°C
Distillation furnace: Room temperature ~500°C