≥350t / h collection belt conveyor asphalt mixing equipment with 5-7mm swing for vibrating screen

Environmental Index of for batch type asphalt plant

1, according to experimental basis of Xitong and relevant asphalt plants, asphalt smoke every ten thousand cubic meters of asphalt mixture produces approximately 22.3kg. Asphalt fume of the project is about 0.279t / a. Asphalt fume is purified, the purification rate is 95%, and then led into the dryer burning, treatment rate is 95%, the annual emission is about 0.0007 t / a, the emission rate 0.00056kg / h, emission concentration 0.056mg / m3.

2, NMHC content is calculated according to 0.01% of the raw material of asphalt, NMHC of this project is 1.2t / a. Same as above, NMHC after treatment, the annual emission is about 0.003 t / a, the emission rate 0.00024kg / h, emission concentration 0.024mg / m3.

3, referring to "Handbook of harmful substances in the industrial production” volume I (Chemical Industry Press, published in December 1987) and "Organic chemical pollution" (Tsinghua University Press, published in August 1990), Bap per ton of oil asphalt produced during the heating process is about 0.10 ~ 0.15g. The project calculates according to the average 0.125g terms, annual Bap is about 0.0015t / a. Same as above, after Bap been treated, the annual emission is about 3.75 × 10^-6 t / a, the discharge rate 0.03 × 10^-4kg / h, the emission concentration 0.30 × 10^-4mg / m³.

4, the project uses natural gas as fuel, the annual gas consumption is about 2700000m³, based on "The first national census of industrial pollution sources of pollution discharge coefficient Handbook", produced air pollutants as follows: the amount of exhaust gas: 3679 × 104Nm³; SO₂ generated amount: 0.108 t / a, concentration: 2.9mg / m³ (gas sulfur content is calculated as 2.9mg / m3); NO_X production: 5.052 t / a, concentration: 137.3mg / m³.

Pollution control measures