IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0621643
(1996-03-26)
|
우선권정보 |
EP-0810358 (1995-05-31) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Asea Brown Boveri AG, CHX
|
대리인 / 주소 |
Burns, Doane, Swecker & Mathis, L.L.P.
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인용정보 |
피인용 횟수 :
18 인용 특허 :
2 |
초록
▼
In a steam generator (1) having, downstream of the fire-box (7), a radiant part and, subsequent thereto, a convective part, the latter essentially comprising, connected in series on the flue-gas side, contact heat exchanger (18), superheater (9) and economizer (2), the steam generator (1) being used
In a steam generator (1) having, downstream of the fire-box (7), a radiant part and, subsequent thereto, a convective part, the latter essentially comprising, connected in series on the flue-gas side, contact heat exchanger (18), superheater (9) and economizer (2), the steam generator (1) being used in a circuit for the direct selective catalytic reduction (SCR process) of the nitrogen oxides in the flue gas (19), the economizer (2) consists of two parts. An NOx catalyst (5) is arranged between the two parts (2a, 2b), the economizer (2a) arranged upstream of the catalyst (5) in the direction of flow of the gas (19) being subdivided into at least two sections (10a, 10b), through which, on the one hand, the flow passes in series on the flue-gas side and, on the other hand, the working medium to be heated flows in parallel from bottom to top, and at least one section (10a) always being connected via lines (11a, 12) to the drum (13) and the other section(s) (10b) being able to be shut off as desired from the water circulation via lines (11b) which can be shut off.
대표청구항
▼
[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A steam generator for direct selective catalytic reduction (SCR process) of nitrogen oxides in a flue gas flow, comprising:a radiant part connected to receive a flue gas flow from a fire box,a convect
[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] A steam generator for direct selective catalytic reduction (SCR process) of nitrogen oxides in a flue gas flow, comprising:a radiant part connected to receive a flue gas flow from a fire box,a convective part connected downstream of the radiant part as a flow duct, the convective part including, in series in the flow duct, a contact heat exchanger, a superheater, and an economizer, wherein the economizer includes two parts, andan NOx catalyst arranged between the two parts of the economizer,wherein, a first part of the economizer upstream of the catalyst in the direction of flow of the flue gas is subdivided into at least two sections, the at least two sections positioned to contact the flue gas flow in series and, the at least two sections connected to receive a working medium in parallel flows,wherein a first section is connected on an outlet side by a line for continuous flow of the working medium to a drum and at least a second section is connected on an outlet side by a line having shut off means for controlled flow of the working medium to the drum.
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