# NOx Formation Project

**Improve Phase John Hausman**  **March 6, 2008**

### 1

# Possible Solutions
 

# Predictive NOx Equation from all operating data by varying furnace conditions
– based on 7 day NOx test.  

# Install 1 CEM per line and create an equation based on the percentage of NOx emitted from each stack in the furnace.

2 

###  

# Install 1 CEM per line and create a predictive equation using that and operating data.

# Solution **Selected**
 

# CCI rejected the idea to install any CEMs due to the maintenance and downtime...  

# This leaves us only one solution to implement, a predictive equation based on operating conditions in the furnace. We will have to create a predictive equation while producing High

3 

# Compression pellets as well, but we do not have any stack testing planned during a high compression pellet run.

# Best Subset **– Stack 1** 

4

# Best Subset **– Stack 2** 

5

# Best Subset **– Stack 3** 

6

# Best Subset **– Stack 4** 

7

# Minitab **Output –**  **Regression for Stack 1**

85 0 0 - 5 0 - 1 0 0 9 9 . 9 9 9 9 0 5 0 1 0 1 0 . 1 **R e**  **s i**  **d u**  **a l** **P e** **r c** **e n** **t**

1 8 0 1 6 5 1 5 0 1 3 5 1 2 0 5 0 0

- 5 0

- 1 0 0 **F i**  **t t**  **e d**  **V a**  **l u**  **e R** **e s** **i d** **u a** **l** 

### N **o r**  **m a**  **l P**  **r o**  **b a**  **b i**  **l i**  **t y**  **P l**  **o t**  **V e**  **r s**  **u s**  **F i**  **t s**  

## R **e s**  **i d**  **u a**  **l P**  **l o**  **t s**  **f o**  **r S**  **t a**  **c k**  **1**

9

4 0 2 0 0 - 2 0 - 4 0 - 6 0 - 8 0 1 0 0 7 5 5 0 2 5 0 **R e**  **s i**  **d u**  **a l** **F r** **e q** **u e** **n c** **y**

1 6 0 1 4 0 1 2 0 1 0 0 8 0 6 0 4 0 2 0 1 5 0 0

- 5 0

- 1 0 0 **O b**  **s e**  **r v**  **a t**  **i o**  **n O**  **r d**  **e r** **R e** **s i** **d u** **a l**  

### H **i s**  **t o**  **g r**  **a m**  **V e**  **r s**  **u s**  **O r**  **d e**  **r**

# Minitab **Output –**  **Regression for Stack 2**

104 0 2 0 0 - 2 0 9 9 . 9 9 9 9 0 5 0 1 0 1 0 . 1 **R e**  **s i**  **d u**  **a l** **P e** **r c** **e n** **t**

1 2 0 1 0 0 8 0 4 0 2 0 0

- 2 0
**F i**  **t t**  **e d**  **V a**  **l u**  **e R** **e s** **i d** **u a** **l** 

### N **o r**  **m a**  **l P**  **r o**  **b a**  **b i**  **l i**  **t y**  **P l**  **o t**  **V e**  **r s**  **u s**  **F i**  **t s** 



## R **e s**  **i d**  **u a**  **l P**  **l o**  **t s**  **f o**  **r S**  **t a**  **c k**  **2**

11

3 0 2 0 1 0 0 - 1 0 - 2 0 - 3 0 8 0 6 0 4 0 2 0 0 **R e**  **s i**  **d u**  **a l** **F r** **e q** **u e** **n c** **y**

1 4 0 1 3 0 1 2 0 1 1 0 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 1 4 0 2 0 0

- 2 0
**O b**  **s e**  **r v**  **a t**  **i o**  **n O**  **r d**  **e r** **R e** **s i** **d u** **a l**  

### H **i s**  **t o**  **g r**  **a m**  **V e**  **r s**  **u s**  **O r**  **d e**  **r**

# Minitab **Output –**  **Regression for Stack 3**

123 0 1 5 0 - 1 5 - 3 0 9 9 . 9 9 9 9 0 5 0 1 0 1 0 . 1 **R e**  **s i**  **d u**  **a l** **P e** **r c** **e n** **t**

1 0 0 9 0 8 0 7 0 6 0 3 0 1 5 0

- 1 5

- 3 0 **F i**  **t t**  **e d**  **V a**  **l u**  **e R** **e s** **i d** **u a** **l** 

### N **o r**  **m a**  **l P**  **r o**  **b a**  **b i**  **l i**  **t y**  **P l**  **o t**  **V e**  **r s**  **u s**  **F i**  **t s** 



## R **e s**  **i d**  **u a**  **l P**  **l o**  **t s**  **f o**  **r S**  **t a**  **c k**  **3**

13

3 0 2 0 1 0 0 - 1 0 - 2 0 - 3 0 8 0 6 0 4 0 2 0 0 **R e**  **s i**  **d u**  **a l** **F r** **e q** **u e** **n c** **y**

1 4 0 1 3 0 1 2 0 1 1 0 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 1 3 0 1 5 0

- 1 5

- 3 0 **O b**  **s e**  **r v**  **a t**  **i o**  **n O**  **r d**  **e r** **R e** **s i** **d u** **a l**  

### H **i s**  **t o**  **g r**  **a m**  **V e**  **r s**  **u s**  **O r**  **d e**  **r**

# Minitab **Output –**  **Regression for Stack 4**

142 0 0 - 2 0 - 4 0 9 9 . 9 9 9 9 0 5 0 1 0 1 0 . 1 **R e**  **s i**  **d u**  **a l** **P e** **r c** **e n** **t**

9 0 8 0 7 0 6 0 5 0 2 0 0

- 2 0

- 4 0 **F i**  **t t**  **e d**  **V a**  **l u**  **e R** **e s** **i d** **u a** **l** 

### N **o r**  **m a**  **l P**  **r o**  **b a**  **b i**  **l i**  **t y**  **P l**  **o t**  **V e**  **r s**  **u s**  **F i**  **t s** 



## R **e s**  **i d**  **u a**  **l P**  **l o**  **t s**  **f o**  **r S**  **t a**  **c k**  **4**

15 **R e**  **s i**  **d u**  **a l**  **F i**  **t t**  **e d**  **V a**  **l u**  **e**

2 0 1 0 0 - 1 0 - 2 0 - 3 0 - 4 0 6 0 4 5 3 0 1 5 0 **R e**  **s i**  **d u**  **a l** **F r** **e q** **u e** **n c** **y**

1 4 0 1 3 0 1 2 0 1 1 0 1 0 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 1 2 0 0

- 2 0

- 4 0
**O b**  **s e**  **r v**  **a t**  **i o**  **n O**  **r d**  **e r** **R e** **s i** **d u** **a l**  

### H **i s**  **t o**  **g r**  **a m**  **V e**  **r s**  **u s**  **O r**  **d e**  **r**

# STD **of Resid vs Average of NOx Conc**

16