National Power Plant Combustion Center

Shenyang, China

National Power Plant Combustion Center

Shenyang, China

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Wang Y.,Harbin Institute of Technology | Qiu P.-H.,Harbin Institute of Technology | Wu S.-H.,Harbin Institute of Technology | Li Z.-Z.,National Power Plant Combustion Center | And 4 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2010

The syngas cooler including radiant syngas cooler (RSC) and convective syngas cooler (CSC), it is the high temperature cooling unit in integrated gasification combined cycle (IGCC) system. It can recover the raw syngas heat energy out of the gasifier to increase the system efficiency, so the study on the syngas cooler characteristic in IGCC system is of great significance. The 200 MW ICCC system model was established using Thermoflex software. From the view of system efficiency, the effect on the system performance with different syngas temperature out of CSC was studied firstly, and then the influence on the system performance with different steam parameter was calculated. The conclusions can be obtained from the calculated results: the system power and efficiency decrease with the increasing of raw syngas temperature out of the CSC; the system efficiency with syngas cooler generating superheated steam is better than the system with syngas cooler generating saturated steam; the system efficiency with syngas cooler generating high pressure steam is better than the system with syngas cooler generating intermediate pressure steam. Considering the cost and the system efficiency, the best steam parameter system scheme is the system with RSC and CSC generating high pressure saturated steam. © 2010 Chin.Soc.for Elec.Eng.


Wang Y.,Harbin Institute of Technology | Qiu P.-H.,Harbin Institute of Technology | Wu S.-H.,Harbin Institute of Technology | Li Z.-Z.,National Power Plant Combustion Center | And 4 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2010

The gasification island is a key and complicate unit in integrated gasification combined cycle (IGCC) system, and it affects the whole system performance greatly. The 200 MW IGCC system model was established using Thermoflex software, from the view of system, the IGCC systems with direct chilling, with and without gas/steam heat exchanger before dust removal were compared, the conclusions were obtained. That is, the IGCC system without gas/steam heat exchanger is much safer and has high system efficiency. Then the nitrogen re-injection coefficient in the air separation unit (ASU), the oxygen/coal ratio in gasification unit and the syngas temperature out of the convective syngas cooler (CSC) were studied based on this system. The result shows that: the best nitrogen re-injection coefficient is 70% with the air separation coefficient of 30%; with considering many elements, the best oxygen/coal ratio is about 0.91 based on the coal studied in this paper; the system efficiency decreases with the syngas temperature out of the CSC, when the syngas temperature out of radiant syngas cooler (RSC) is 700°C, the syngas temperature out of CSC is better to select 350°C and then its system efficiency is comparatively high. © 2010 Chin. Soc. for Elec. Eng.

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