Tsinghua University

Beijing Yingde Qingda Technology Co., Ltd.

Jiansheng Zhang

Hui Li

Hai Tao Zhang

Hongbo Ma

Guangxi Yue

Junfu Lv

Dadi Gu

Hairui Yang

A gasification furnace is provided. The gasification furnace includes an outer shell having an outer shell inlet formed at a top of the outer shell and an outer shell outlet formed at a bottom of the outer shell; an inner shell having an inner shell inlet corresponding to the outer shell inlet, and an inner shell outlet corresponding to the outer shell outlet, and being fabricated by a membrane wall having a cooling water inlet and a cooling water outlet; a nozzle; a lower shell having a slag exhausting port and a gas discharging port; a cooler having a cooling passage formed therein, a cooler water inlet, and a cooler water outlet; a positioning member disposed between the inner shell and an inner bottom wall of the outer shell; and a gas guiding pipe defining an upper end connected with the cooler, and a lower end extended downward.

Gasification system

A method, system and apparatus for a low bed pressure drop circulating fluidized bed (CFB) boiler associated with fast bed CFB combustion are disclosed. The CFB boiler may be operated according to the following set of conditions. In an upper area of a combustor of the boiler, a flow pattern of the two-phase gas-solid flow may be placed in a fast bed fluidization state. The combustor temperature may be within a range of 850&#xb0; C.-930&#xb0; C. The fluidizing air velocity may be within 4 m/s and 6.2 m/s. An average size of a bed material in the combustor may be smaller than 300 &#x3bc;m. The gas-solid flow above of the secondary air inlet in the combustor may be kept in the fast bed fluidization state while maintaining a solid concentration of between 1 kg/m3 to 5 kg/m3. An inventory of bed material per unit area and/or the pressure drop in the combustor may be less than 8 kPa.

Low bed pressure drop circulating fluidized bed boiler and combustion process

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Beijing, China

Jiansheng Zhang