A dual-pressure flare system and a method of its use. The dual-pressure flare system includes a dual-pressure flare stack having a central axis that is aligned with the center of a high-pressure outlet; a high-pressure flue having a central axis that is co-linear with the central axis of the dual-pr
A dual-pressure flare system and a method of its use. The dual-pressure flare system includes a dual-pressure flare stack having a central axis that is aligned with the center of a high-pressure outlet; a high-pressure flue having a central axis that is co-linear with the central axis of the dual-pressure flare stack; and a low-pressure flue connected to a low-pressure tip. Some exemplary embodiments of the system further include an air-assist assembly having an air-supply connection connected to an air blower and a mixing chamber, wherein the mixing chamber surrounds the low-pressure tip. In some exemplary embodiments, the air-supply connection is disposed outside the dual-pressure flare stack and the high-pressure flue.
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1. A dual-pressure flare system comprising: (a) a flare stack comprising a high-pressure chamber having a high-pressure gas inlet, a high-pressure gas outlet, and a low-pressure chamber having a low-pressure gas inlet and a low-pressure gas outlet, the low-pressure chamber and the high-pressure cham
1. A dual-pressure flare system comprising: (a) a flare stack comprising a high-pressure chamber having a high-pressure gas inlet, a high-pressure gas outlet, and a low-pressure chamber having a low-pressure gas inlet and a low-pressure gas outlet, the low-pressure chamber and the high-pressure chamber in vertically stacked relationship;(b) a vertically-extending high-pressure gas flue having a first end in fluid communication with the high-pressure gas outlet, a second end in fluid communication with a high-pressure tip;(c) a vertically-extending low-pressure gas flue having a first end in fluid communication with the low-pressure gas outlet, a second end in fluid communication with a low-pressure tip; and(d) a flame hood surrounding the high-pressure tip, the flame hood comprising a plurality of flame hood air holes and a pilot light pipe. 2. The system of claim 1 wherein the high-pressure gas flue has a first inner diameter and a second inner diameter, wherein the second inner diameter is about 33% to about 66% smaller than the first inner diameter, and wherein the second inner diameter is downstream from the first diameter. 3. The system of claim 1 wherein the high-pressure gas flue has a first inner diameter and a second inner diameter, wherein the second inner diameter is about 25% to about 50% smaller than the first inner diameter, and wherein the second inner diameter is downstream from the first diameter. 4. The system of claim 1 wherein the high-pressure tip comprises at least one opening, wherein an opening diameter smaller than a high-pressure tip inner diameter by about 25% to about 50%. 5. The system of claim 1 wherein the low-pressure gas outlet is about 25% to about 50% narrower than the high-pressure gas outlet. 6. The system of claim 1 wherein the low-pressure gas flue further comprises a transition narrowing an inner diameter of the low-pressure gas flue by about 25% to about 50%. 7. The system of claim 1 wherein the low-pressure tip comprises at least one opening, wherein an opening diameter is smaller than a low-pressure tip inner diameter by about 25% to about 50%. 8. The system of claim 1 wherein the high-pressure gas inlet is configured to induce a vortical flow of the high-pressure gas. 9. The system of claim 1 wherein the low-pressure gas inlet is configured to induce a vortical flow of the low-pressure gas. 10. The system of claim 1 further comprising an air-assist assembly having a first end in fluid communication with an air blower and a second end in fluid communication with a mixing chamber, wherein the mixing chamber surrounds the low-pressure tip. 11. The system of claim 10 wherein the low-pressure tip opening is oriented in a direction of a flow of assist air supplied by an air-assist assembly. 12. The system of claim 1 further comprising a pilot light assembly located to provide flame to ignite gas exiting from the high pressure tip and the low pressure tip. 13. The system of claim 10 wherein the pilot assembly further comprises a pilot igniter and a pilot guide rail, wherein the pilot guide rail is structurally connected to the high-pressure flue with a plurality of support brackets, wherein the pilot igniter is elevated inside the pilot guide rail with a pilot winch, and wherein the pilot igniter is in fluid communication with a pilot gas supply hose. 14. A high efficiency air-assisted dual-pressure flare system comprising: a vessel compartmentalized into a high pressure chamber and a low pressure chamber separated from each other; the high pressure chamber having a high-pressure gas inlet, and a high pressure gas outlet, and the low pressure chamber having a low pressure gas inlet and a low pressure gas outlet, the high pressure and low pressure chambers in vertically stacked relation to each other;a high pressure gas inlet conduit in fluid communication with the high pressure chamber;a low pressure gas conduit in fluid communication with the low pressure chamber;a high pressure gas flue in fluid communication with the high pressure chamber and extending vertically from the high pressure gas chamber outlet to terminate in a high pressure burner having a burner tip, a diameter of the high pressure flue decreasing from a first diameter at the high pressure gas chamber outlet to a second diameter at the high pressure burner;a low pressure gas flue in fluid communication with the low pressure chamber and extending vertically from the low pressure gas chamber outlet to terminate in a low pressure tip having a low pressure burner, a diameter of the low pressure flue decreasing from a first diameter at the low pressure gas chamber outlet to a second diameter at the low pressure burner;an air-assist system comprising a blower, the blower controlledly directing air through an air conduit into the low pressure flue, the air conduit injecting air into the low pressure flue at a point proximate and below the low pressure flue tip to mix air into low pressure gas flowing in the low pressure flue in order to promote smokeless and efficient combustion of low pressure hydrocarbon gas in the low pressure burner at the low pressure flue tip; anda flame hood surrounding the high-pressure tip, the flame hood comprising a plurality of flame hood air holes and a pilot light pipe;whereby, during flare operation, the dual flare system provides smokeless combustion and a destruction and removal efficiency of hydrocarbons of at least 98%, at a sound level of about 90 to about 116 decibels, as measured at a distance of 100 feet from the dual pressure flare system.
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이 특허에 인용된 특허 (32)
Schwartz Robert E. (Tulsa OK) Keller Michael R. (Tulsa OK), Apparatus and method to add kinetic energy to a low pressure waste gas flare burner.
Stephens Darrell A. (Corpus Christi TX) Duke Bobby R. (Midland TX), Portable flare boom capable of being easily raised and lowered to change the flaring assembly.
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