BaoyingXiexin Biomass Power Co., Ltd

Baoying Xiexin Biomass Power Co., Ltd was put into operation in 2005. Baoying Xiexin Biomass Power Co., Ltd (hereinafter referred to as Baoying Xiexin) is located in Anyi industrial zone in Anyi town, of Baoying coutry in Yangzhou. It is an environmental Combined Heat and Power (CHP) enterprise invested to build by Hong Kong Xiexing group (Holding) Limited Company.

Main equipments (boiler, steam turbine unit, etc.) of the plant have been running steadily without any serious failures since units 1 and 2 were put into operation in 2005. There were some problems in unit 3 about the feed system and combustion system in the initial operation period. But through technicians’ repeated debugging and exploration, the problems had been solved preliminarily and the plant could operate normally, which is a successful case of the co-combustion model.

Fuel is the key to ensure power plants operate continuously and steadily. The plant uses two different kinds of fuels, biomass (renewable) and coal (non-renewable). Non-renewable fuels include coal, peat and low quality coal.

The biomass used is not only the rice husk but also a large number of crop straws, rice straw, wheat straw and so on. It is worth noting that distribution and collection of rice husk and straw are completely different.

The mixed fuels are not only rice husk but also a large amount of rice straw, wheat straw and other soft straw in Baoying Xiexin. Fuel feeding is distinctive and the plant owns two sets of feeding systems, one of co-combustion and the other of direct combustion.

The feeding process of co-combustion is as follows: Boilers 1 and 2 share the same feed­ing system. Then the biomass fuels (mainly rice husk) are sent to respective feeding pipes by scraper conveyor and electric three-way valve, which can control the amount of feeding biomass simultaneously, and finally biomass together with coal are sent into the furnace.

Similar to the power plant in XinYuan Fengxian, this plant also adopts Combined Heat and Power, with power generation mainly and heating supplement secondly. In 2006, total power generation was 2.24 billion kWh and net generation to grid was 206 million kWh. Grid electricity price (tax included) was 0.646 Yuan/kWh and the plant sold the power to Jiangsu Electric Power Company.

Because mixing ratio of the plant satisfies the requirements, the plant received electricity price subsidy of 0.25 Yuan/kWh inNovember 2007. Net power price, including tax, is 0.646 Yuan/kWh at present, which was 0.469 Yuan/kWh before. At the same time, the name of the plant was changed from Baoying Xiexin Biomass Environmental Protection Thermoelectric Co., Ltd. to Baoying Xiexin Biomass Power Co., Ltd.