Xenoestrogen-Induced ERK-1 and ERK-2 Activation via Multiple Membrane-Initiated Signaling Pathways
TI 401_eng - ERK Technical Principle
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No. : TI 401_eng Rev. : 0 Page : 1 of 1 TECHNICAL INFORMATION Date : 22.07.09 SCHNEIDER-Eckrohrboiler Technical Principal Doc.: TI 401_eng - ERK Technical Principle (SE).doc SCHNEIDER Engineering GmbH Email / Internet Hildburghauser Strasse 79 [email protected] 12249 Berlin, Germany www.schneider-kessel.com Tel.: +49-30-75 44 93 99-0 Fax: +49-30-75 44 93 99-21 Water tube boilers of SCHNEIDER-Eckrohrboiler corner tube Design The SCHNEIDER-Eckrohrboiler is a modern natural circulation boiler and it is used as a generator of steam and hot water. For both types of boiler, the tube bodies are constructed in the same way – namely from prefabricated furnace and convection heating surfaces. Its construction differs from the conventional water-tube boiler with natural circulation, which has been built since the beginning of this 2000 century as a multidrum boiler with heated downcomers. Design principle The pressure vessel consists of a stabile rectangular framework of downcomers, collectors and distributors, welded together to form a self-enclosed tube-cage with tube walls that are flue gas- proof. 1. Drum 2. Down corner tube 3. Bottom tubes 4. Upper collector 5. Overflow tube 6. Return tube 7. Riser tube 8. Mixture tube 9. Partition wall 10. Steam outlet 11. Lower collector Special Water Circulation System The water circulation of the SCHNEIDER-Eckrohrboiler has a number of special characteristics which distinguishes it from those of all other known natural circulation water tube boilers especially from the bi-drum design. In the SCHNEIDER-Eckrohrboiler only riser tubes (7) and bottom tubes (3) are heated while the drum (1), the down corner tubes (2), the overflow tubes (5) the return tubes (6), the mixture tubes (8) and all collectors are unheated. The steam-water mixture, which is generated in the riser tubes (7) and button tubes (3) rises into the unheated upper collector (4). A procedure of a nearly com- plete separating of steam and water starts (gravity principle). The separated steam flows over the overflow tubes (5) into the drum, namely into the area behind the partition wall (9) above the lowest
description
TI 401_eng - ERK Technical Principle
Transcript of TI 401_eng - ERK Technical Principle
No. : TI 401_eng Rev. : 0
Page : 1 of 1 TECHNICAL INFORMATION
Date : 22.07.09
SCHNEIDER-Eckrohrboiler
Technical Principal
Doc.: TI 401_eng - ERK Technical Principle (SE).doc
SCHNEIDER Engineering GmbH Email / Internet
Hildburghauser Strasse 79 [email protected] 12249 Berlin, Germany www.schneider-kessel.com Tel.: +49-30-75 44 93 99-0 Fax: +49-30-75 44 93 99-21
Water tube boilers of SCHNEIDER-Eckrohrboiler corner tube Design
The SCHNEIDER-Eckrohrboiler is a modern natural circulation boiler and it is used as a generator of steam and hot water. For both types of boiler, the tube bodies are constructed in the same way – namely from prefabricated furnace and convection heating surfaces. Its construction differs from the conventional water-tube boiler with natural circulation, which has been built since the beginning of this 2000 century as a multidrum boiler with heated downcomers.
Design principle
The pressure vessel consists of a stabile rectangular framework of downcomers, collectors and distributors, welded together to form a self-enclosed tube-cage with tube walls that are flue gas-proof.
1. Drum
2. Down corner tube
3. Bottom tubes
4. Upper collector
5. Overflow tube
6. Return tube
7. Riser tube
8. Mixture tube
9. Partition wall
10. Steam outlet
11. Lower collector
Special Water Circulation System
The water circulation of the SCHNEIDER-Eckrohrboiler has a number of special characteristics which distinguishes it from those of all other known natural circulation water tube boilers especially from the bi-drum design.
In the SCHNEIDER-Eckrohrboiler only riser tubes (7) and bottom tubes (3) are heated while the drum (1), the down corner tubes (2), the overflow tubes (5) the return tubes (6), the mixture tubes (8) and all collectors are unheated. The steam-water mixture, which is generated in the riser tubes (7) and button tubes (3) rises into the unheated upper collector (4). A procedure of a nearly com-plete separating of steam and water starts (gravity principle). The separated steam flows over the overflow tubes (5) into the drum, namely into the area behind the partition wall (9) above the lowest
No. : TI 401_eng Rev. : 0
Page : 2 of 2 TECHNICAL INFORMATION
Date : 22.07.09
SCHNEIDER-Eckrohrboiler
Technical Principal
Doc.: TI 401_eng - ERK Technical Principle (SE).doc
SCHNEIDER Engineering GmbH Email / Internet
Hildburghauser Strasse 79 [email protected] 12249 Berlin, Germany www.schneider-kessel.com Tel.: +49-30-75 44 93 99-0 Fax: +49-30-75 44 93 99-21
water level. Approximately 50% portion of the separated water flows through the unheated return tubes (6) down to the heated bottom tubes (3) and the remainder via the mixture tubes (8) towards the drum (1) into the drum area behind the partition wall (9) and below low water level LWL. From there it flows down through the unheated down corner tubes (2) back into the unheated lower col-lector (11) from where it is distributed to the bottom tubes (3) and the riser tubes (7) and the cycle starts again
Advantages of SCHNEIDER-Eckrohrboiler
� Utilization of various fuels
� Short start-up time and extremely high load variation speed at stable water level
� Compact and self supporting design
� No material stress since the tube cage and the drum expand independent of one another
� Generation of 100% dry and pure steam
� Adapts ideally to the space available
