Conditions of use

(1) temperature: 0 to 40 ℃

(2) relative humidity: less than 80%

(3) power supply: voltage: 220 + + 22V

Frequency ratio: 50 + / - 0.5 Hz

(4) carrier gas: helium, purity is higher than 99.8%.

(5) power: not less than 4.5KW.

(6) no strong magnetic field interference

Principle of measurement

A certain amount of coal or coke sample, in the presence of alumina as a catalyst and loose agent conditions, at 1050 ℃ access to water vapor, the sample of nitrogen and its compounds all reduced to ammonia. The resulting ammonia is distilled through a sodium hydroxide solution and titrated with a saturated boric acid solution to calculate the nitrogen content according to the consumption of the standard sulfuric acid solution.

Technical parameters

(1) measurement range: 0.01-50%

(2) sample size: about 100mg;

(3) time of single determination: about 35min;

(4) power consumption: 4000W

The technical requirements

(1) Repeatability (in line with GB / T 19227-2008) ≤0.08%

(2) temperature control accuracy: set value ± 10 ℃

(3) Temperature range:

Hydrolysis furnace: room temperature ~ 1200 ℃

Steam furnace: room temperature ~ 500 ℃

Distillation furnace: room temperature ~ 500 ℃