Benefits of Pressure-Assisted Flares

Transcription

1 Benefits of Pressure-Assisted Flares Scott F Reid Project Engineering Manager John Zink Company LLC scott.reid@johnzink.com 3/7/16 Page 1

2 Important Notice The information contained in these materials is for informational purposes only and is provided AS IS, without warranties of any kind. Your use of the information contained herein is at your sole risk. We expressly disclaim any express or implied representations, warranties or guaranties, including without limitation, the implied warranties of merchantability and fitness for a particular purpose. We will have absolutely no liability (whether direct, indirect or consequential) in connection with these materials (and/or the information contained therein) including without limitation, any liability for damage to person or property. We also reserve the right to make subsequent changes to the materials without prior notice. For purposes of this notification, We includes John Zink Company LLC and its affiliates and their respective employees, partners, principles, agents and representatives, and any third-party providers or sources of information or data. johnzinkhamworthy.com/trademarks 3/7/16 Page 2

3 Outline Different Types of Pressure-Assisted Flares Introduction / Background Importance of Flare System Design Operation of Pressure-Assisted Flares Emission Test Results 3/7/16 Page 3

4 How is a Pressure-Assisted Flare different? Assisted / Unassisted Flares Unassisted-Pipe Flare / Utility Assisted Smokeless Steam, Gas, Air, or Pressure Pressure assisted-flares entrain air Sonic Velocity No Utilities- Steam, Power 3/7/16 Page 4

5 Pressure-Assisted Flare Experience Over 1,000 projects, ~42 countries and ~29 states. Several hundred pressure-assisted flares throughout the USA.! " to! $ are offshore Significantly less operational issues than other types of assisted flares. Pressure-assisted flares are the preferred technology worldwide when process conditions allow. High customer satisfaction. 3/7/16 Page 5

6 Pressure-Assisted Flares What s the issue with permitting pressure-assisted flares? How is a pressure-assisted flare different? Types of pressure-assisted flares Coanda Burner Spider Burner Converging Nozzle 3/7/16 Page 6

7 What s the Issue with Permitting Pressure- Assisted Flares? Main flare EPA flare regulations are found in 40 CFR or 40 CFR Steam-assisted, Air-assisted, and Non-assisted. 40 CFR / limits flare exit velocity. Pressure-assisted flares not addressed. 3/7/16 Page 7

8 Steam and Non-assisted Flares 400 ft/s Log!) V +,- = H Permissible Region 3/7/16 Page 8

9 Air-assisted Flares V +,- = (H < ) 3/7/16 Page 9

10 Coanda Pressure-Assisted Flares Coanda Principle Tendency of a fluid jet to stay attached to a curved surface instead of flowing along a straight path from its origin. Photo: John Zink Hamworthy Combustion 3/7/16 Page 10

11 Coanda Pressure-Assisted Flares Photo by Reed Young. As featured in Popular Mechanics magazine. 3/7/16 Page 11

12 Spider Burner Pressure-Assisted Flares Photo: John Zink Hamworthy Combustion 3/7/16 Page 12

13 Converging Nozzle Pressure-Assisted Flares Photo: John Zink Hamworthy Combustion 3/7/16 Page 13

14 Variable Slot Coanda Flare 100 Flow Rate 50 Variable Slot Coanda Flare Sonic Flare Tip Pressure (psig) 3/7/16 Page 14

15 Importance of Flare System Design Back-Pressure Must prevent equipment over-pressure Proper PRVs Capacity Small single point elevated flare to the worlds largest multipoint ground flares. 3/7/16 Page 15

16 HP / LP Flare System Design Conserve and utilize pressure HP / LP Design Have HP and LP headers and flares. 3/7/16 Page 16

17 Operation Benefits No Operator Intervention No Operator Judgment No Utilities No Knobs to Adjust High Smokeless Capacity 3/7/16 Page 17

18 Applications Anytime pressure is available Offshore Gas Plants Compressors Stations Pipeline 3/7/16 Page 18

19 Emission Test Results Numerous emission tests for clients Natural gas, saturated and unsaturated mixtures with inerts Extractive and PFTIR Analysis ~80 Test Runs 3/7/16 Page 19

20 Emission Test Results x > = 99.96% Permissible Region 3/7/16 Page 20

21 Emission Test Results 400 ft/s Velocity Limit 3/7/16 Page 21

22 Emission Test Results 3/7/16 Page 22

23 Emission Test Results High Destruction Efficiency Composition Pressure / Flow Rate Properly designed pressure-assisted flares can be better for the environment than other types of flares. 98% vs. 99.5% 75% reduction 3/7/16 Page 23

24 Summary High destruction efficiency Many suitable applications High smokeless capacity Reduced thermal radiation Excels under maintenance / start-up / shutdown events High customer satisfaction Wide effective operational range 3/7/16 Page 24

25 Scott F Reid Project Engineering Manager John Zink Company LLC scott.reid@johnzink.com Contributors: Jim Franklin Zach Kodesh 3/7/16 Page 25