Table 7 Different primary and secondary air proportions.

From: Optimization of municipal solid waste incineration for low-NOx emissions through numerical simulation

Simulation results-different primary and secondary air proportions

Conditions

Avg. turbulence intensity at y = 8190 (m2/s2)

Oxygen content at outlet of third flue (%)

Avg. temperature of first flue (K)

Temperature at outlet of first flue (K)

Temperature at outlet of third flue (K)

Residence time at 850 ℃ (s)

NOx at outlet of third flue (mg/Nm3)

3-1

13.88

6.99

1,254.75

1,167.14

1,018.45

3.29

270.57

3-2

8.39

7.28

1,180.67

1,137.22

1,002.76

3.43

293.00

3-3

6.29

7.35

1,144.78

1,141.00

1,007.44

3.42

299.92

3-4

9.93

7.86

1,146.05

1,095.16

969.77

2.61

309.28

3-5

13.92

7.66

1,162.12

1,103.30

979.22

2.93

292.01

3-6

17.05

7.20

1,196.51

1,125.86

991.51

3.48

277.97

3-7

20.80

6.87

1,213.88

1,128.28

999.14

3.45

268.41

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