The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2017
Filed:
Oct. 09, 2013
Dongfang Electric Corporation, Chengdu, Sichuan, CN;
Liyong Cao, Chengdu, CN;
Wei Fan, Chengdu, CN;
Qi Du, Chengdu, CN;
Pan Guo, Chengdu, CN;
Zhengning Liu, Chengdu, CN;
Jiang Liu, Chengdu, CN;
Yuan Zhang, Chengdu, CN;
Chunfei Zhang, Chengdu, CN;
Hongwei Hu, Chengdu, CN;
Yang Li, Chengdu, CN;
Xin Zhang, Chengdu, CN;
Dongfang Electric Corporation, Chengdu, CN;
Abstract
An external bed type double-fluidized bed system for preventing boiler contamination includes a fluidized bed combustion furnace, a cyclone separator, a coal ash distributor and a fluidized bed pyrolysis furnace. The fluidized bed combustion furnace is connected with the coal ash distributor, the coal ash distributor is connected with the coal ash inlet on a side wall of the fluidized bed combustion furnace through a return feeder with which the coal ash outlet of the fluidized bed pyrolysis furnace is also connected through an external bed, and the return feeder is connected with the fluidized bed combustion furnace. A fuel coal is pyrolyzed in the fluidized bed pyrolysis furnace at a temperature to volatize alkali chlorides into a pyrolysis gas, thereby reducing the content of the alkali chlorides contained in the coal in the fluidized bed combustion furnace and relieving the contamination to a convective heat-absorbing surface.