Aiming to further investigate preheating combustion technology on pollutants reduction impacts, a wider preheating temperature 600–1400 °C was conducted and the NOx and SO₂ two pollutants emission were tested. Results showed that preheating combustion was an effective de-NOx technology but invalid for de-SO₂. The increase of preheating temperature can boost NOx reduction and carbon burn off rate. The higher the preheating temperature, the larger the NOx reduction amplitude. When increasing the preheating temperature from 800 °C to 1400 °C, the NOx reduction rate could reach 20.2% and fly ash carbon could reduce 27.9% respectively. NO was the major composition in NOx. However, NO was decreased remarkably but NO₂ increased by a certain margin in fuel-rich condition. To achieve ultra-low pollutants emission, NO₂ should also be aroused attention besides NO.

为了进一步研究预热燃烧技术对减少污染物的影响，进行了更广泛的预热温度600-1400°C的测试，并测试了NOx和SO ₂两种污染物的排放。结果表明，预热燃烧是一种有效的脱NOx技术，但对de-SO ₂无效。预热温度的升高可以促进NOx的还原和碳的燃尽率。预热温度越高，NOx还原幅度越大。当将预热温度从800°C增加到1400°C时，NOx还原率可达到20.2％，粉煤灰碳可降低27.9％。NO是NOx中的主要成分。但是，NO显着降低，但NO ₂在燃料丰富的情况下增加了一定的幅度。为了实现超低污染物排放，除NO外，还应引起NO _2的注意。