Title:
A METHOD FOR SEWAGE SLUDGE TREATMENT BY USING CIRCULATING FLUIDIZED BED COMBUSTION
Document Type and Number:
WIPO Patent Application WO/2005/085143
Kind Code:
A1
Abstract:
The present invention discloses a method for treating sewage sludge by using circulating fluidized bed combustion. The method includes the following steps: (1) preparing the slurry of sludge with coal, by mixing fine coal and dispersant with sludge, then adding stabilizing agent; (2) burning the slurry by feeding the slurry into a circulating fluidized bed boiler which containing fluidized media of quartz sand and limestone. The preparation of the slurry also includes the steps: firstly, waste water is adsorbed/filtered by fine coal and Ca0, then others fine coal is added into the result sludge, thus the slurry is obtained.
Inventors:
ZHANG DAWEI (CN)
Application Number:
PCT/CN2005/000058
Publication Date:
September 15, 2005
Filing Date:
January 14, 2005
Export Citation:
Assignee:
SHENYANG DAVID INTERNAT MACHIN (CN)
ZHANG DAWEI (CN)
ZHANG DAWEI (CN)
International Classes:
C02F1/28; C02F11/00; C02F11/06; C10L1/00; F23C10/00; F23G5/30; F23G7/00; (IPC1-7): C02F11/00; C10L1/00; F23C10/00; F23G5/30; F23G7/00
Foreign References:
| CN1089923A | 1994-07-27 | |||
| US4983296A | 1991-01-08 | |||
| JP2002039519A | 2002-02-06 | |||
| JP2002098313A | 2002-04-05 | |||
| JP2004060927A | 2004-02-26 | |||
| US5211723A | 1993-05-18 |
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD (Bldg. B Tsinghua Tongfang Hi-Tech Plaza, No.1,
Wangzhuang Rd, Haidian District Beijing 3, CN)
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