04/02029 On the fouling mechanism of non-bounded oil shale ash deposits on boiler heat-transfer surfaces: Ots, A. and Tiikma, T. Oil Shale, 2003, 20, (1), 3–13
- Publisher
- Elsevier Science
- Year
- 2004
- Weight
- 173 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
Process heating, power and incineration (energy applications in industry)
A pneumatically conveyed flow of solids is continuously introduced into a pressure vessel in which a fluidized bed is maintained by adding a fluidization gas. The fluidized bed is heated by heat exchange with a heat-transfer medium. The solid-gas mixture is continuously withdrawn from the fluidized bed and divided into a lean gas phase and a highly compressed solid-gas mixture by gravitational or centrifugal separation. The highly compressed solid-gas mixture is then continuously discharged into a pneumatic transport line and conveyed pneumatically. The solid content of the pressure vessel is continuously monitored. The continuous discharge of the highly compressed solid/ gas mixture into the pneumatic transport line is controlled via a controlled gas withdrawal from the lean gas phase in such a manner that the solid content of the pressure vessel remains substantially constant.