Title:
DEVICE AND METHOD FOR TREATING HEAVY METAL HAZARDOUS WASTE BY MEANS OF VACUUM CHLORINATION ROASTING
Document Type and Number:
WIPO Patent Application WO/2020/103642
Kind Code:
A1
Abstract:
A device and method for treating heavy metal hazardous waste by means of vacuum chlorination roasting. The method comprises: drying, grinding and sieving heavy metal hazardous solid waste, adding a chlorinating agent or a chlorinating agent and another additive, mixing uniformly, and then adding the mixture to a chlorination roasting chamber (1) through a high-level hopper (3); setting the pressure to 1 to 105 Pa, vacuumizing, and then setting the heating temperature to 200 to 600ºC, and stirring, heating and roasting the material in the chlorination roasting chamber (1) for 0.5 to 2 h; collecting, through a pipeline, generated volatile metal chlorides by a gas absorption chamber (2) containing an absorption liquid; and washing the remaining slag obtained in the chlorination roasting chamber (1), then filtering with pressure, and drying to obtain detoxified slag. The device and method are simple and convenient to operate, and can implement both detoxification of waste residues and resource recovery. There are no three wastes generated in the entire process route, and economic and social benefits are significant.
Inventors:
LIU XUEMING (CN)
LIN ZHANG (CN)
SU XINTAI (CN)
YU YAO (CN)
ZHOU JIN (CN)
ZHONG ZUQI (CN)
LIN ZHANG (CN)
SU XINTAI (CN)
YU YAO (CN)
ZHOU JIN (CN)
ZHONG ZUQI (CN)
Application Number:
PCT/CN2019/113144
Publication Date:
May 28, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
C22B1/08; C22B7/00; C22B13/00; C22B34/32
Foreign References:
| CN109554536A | 2019-04-02 | |||
| CN209276586U | 2019-08-20 | |||
| CN205599155U | 2016-09-28 | |||
| CN106676257A | 2017-05-17 | |||
| CN207632860U | 2018-07-20 | |||
| CN107151738A | 2017-09-12 | |||
| US20120114539A1 | 2012-05-10 | |||
| JP2001011542A | 2001-01-16 | |||
| CN104611542A | 2015-05-13 | |||
| CN108330274A | 2018-07-27 |
Other References:
SUN, QING ET AL.: "The Disposal of Waste Dry Batteries with Vacum Chloridizing Roasting", JOURNAL OF HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY, vol. 24, no. 4, 31 December 2003 (2003-12-31), ISSN: 1008-1542, DOI: 20200110101527
Attorney, Agent or Firm:
GUANGZHOU HUAXUE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
Download PDF:
Previous Patent: RELAY COMMUNICATION METHOD AND APPARATUS
Next Patent: DATA PROCESSING METHOD, DEVICE AND COMPUTER-READABLE STORAGE MEDIUM
Next Patent: DATA PROCESSING METHOD, DEVICE AND COMPUTER-READABLE STORAGE MEDIUM