التفاصيل البيبلوغرافية
| العنوان: |
Low Nox Swirl Coal Combustion Burner |
| Document Number: |
20100018445 |
| تاريخ النشر: |
January 28, 2010 |
| Appl. No: |
12/227473 |
| Application Filed: |
July 18, 2007 |
| مستخلص: |
A burner includes a primary air-coal mixture duct coaxially extended through a secondary air wind box, a pulverized coal separator supported within the primary air-coal mixture duct, a secondary air duct including an inner secondary air duct and an outer secondary air duct coaxially formed around the primary air-coal mixture duct, a primary air-coal mixture conical outlet coupled with the outlet of the primary air-coal mixture duct, and inner secondary air and outer conical outlets coupled with the outlets of the inner secondary air and outer secondary air ducts respectively. The conical outlets are arranged to delay the mixing time of the primary air-coal mixture and secondary air flows through the primary air-coal mixture and secondary air ducts and to prolong the residence time in the center recirculation zone under the reduction ability so as to effectively reduce the formation of NOx. |
| Inventors: |
Li, Zhenggi (Nangang District Harbin, CN); Chen, Zhichao (Nangang District Harbin, CN); Sun, Rui (Nangang District Harbin, CN); Sun, Shaozeng (Nangang District Harbin, CN); Wu, Shaohua (Nangang District Harbin, CN); Qin, Ming (Nangang District Harbin, CN); Qin, Yunkun (Nangang District Harbin, CN) |
| Assignees: |
HARBIN INSTITUTE OF TECHNOLOGY (HARBIN, CN) |
| Claim: |
1. A low NOx swirl coal combustion burner, comprising: a primary air-coal mixture duct; one or more pulverized coal separators supported within said primary air-coal mixture duct, wherein an outlet of the pulverized coal separator, which is an opening having a smaller diameter, is alignedly pointing towards an outlet of said primary air-coal mixture duct; a secondary air wind box, wherein said primary air-coal mixture duct is coaxially extended through said secondary air wind box; and an inner secondary air vane, wherein inner and outer tubular sleeves are encirclingly coupled with said primary air-coal mixture duct to form an inner secondary air duct and an outer secondary air duct within the secondary air wind box, wherein said inner secondary air vane is supported within said inner secondary air duct; a primary air-coal mixture conical outlet, wherein an opening of said primary air-coal mixture conical outlet, with a smaller diameter, is coupled with said outlet of said primary air-coal mixture duct; an inner secondary air conical outlet, wherein an opening of said inner secondary air conical outlet, with a smaller diameter, is coupled with an outlet of said inner secondary air duct; and an outer secondary air conical outlet, wherein an opening of said outer secondary air conical outlet, with a smaller diameter, is coupled with an outlet of said outer secondary air duct. |
| Claim: |
2. The low NOx swirl coal combustion burner, as recited in claim 1, wherein said pulverized coal separators are coaxially supported within said primary air-coal mixture duct along a centerline thereof, wherein the diameters of said pulverized coal separators are gradually and sequentially reducing towards said outlet of said primary air-coal mixture duct. |
| Claim: |
3. The low NOx swirl coal combustion burner, as in claim 1 or 2, wherein said inner secondary air duct and said outer secondary air duct are coaxially formed with respect to said primary air-coal mixture duct such that said inner secondary air duct, an outer secondary air duct, and said primary air-coal mixture duct share a common axis. |
| Claim: |
4. The low NOx swirl coal combustion burner, as recited in claim 1, wherein said primary air-coal mixture conical outlet is extended inclinedly at an angle α with respect to a centerline of said primary air-coal mixture duct, wherein said inner secondary air conical outlet is extended inclinedly at an angle β with respect to said centerline of said primary air-coal mixture duct, wherein said outer secondary air conical outlet is extended inclinedly at an angle γ with respect to said centerline K of said primary air-coal mixture duct, wherein said angles α, β, γ are the same, wherein each of said angles α, β, γ has a threshold between 15° to 35°. |
| Claim: |
5. The low NOx swirl coal combustion burner, as recited in claim 1, wherein said inner secondary air vane comprises a set of curved vane blades evenly, radially, and outwardly extended from an outer circumferential wall of said primary air-coal mixture duct that a corresponding edge of each of said curved vane blades is securely affixed to said outer circumferential wall of said primary air-coal mixture duct. |
| Claim: |
6. The low NOx swirl coal combustion burner, as in claim 1, 2, or 4, further comprising an inner secondary air damper supported at an inlet of said inner secondary air duct. |
| Claim: |
7. The low NOx swirl coal combustion burner, as recited in claim 1, further comprising an outer secondary air vane supported at an inlet of said outer secondary air duct. |
| Claim: |
8. The low NOx swirl coal combustion burner, as recited in claim 7, wherein said outer secondary air vane comprises a set of flat vane blades and a regulator, wherein each of said flat vane blades is coupled at an inlet wall of said outer secondary air duct via said regulator. |
| Current U.S. Class: |
110/264 |
| Current International Class: |
23 |
| رقم الانضمام: |
edspap.20100018445 |
| قاعدة البيانات: |
USPTO Patent Applications |
