Title:
PREPARATION METHOD AND USAGE METHOD OF INHIBITOR FOR PREVENTING SPONTANEOUS COMBUSTION OF DRY LIGNITE
Document Type and Number:
WIPO Patent Application WO/2017/071025
Kind Code:
A1
Abstract:
Provided are a preparation method and a usage method of an inhibitor for preventing the spontaneous combustion of dry lignite, belonging to preparation methods and usage methods of an inhibitor for preventing the spontaneous combustion of coal. A component (A) of the inhibitor accounting for 60-80 wt% is a main inhibitor, and a component (B) of the inhibitor accounting for 20-40 wt% is a secondary inhibitor. The preparation method comprises: (1) preparing a sample; (2) preparing the secondary inhibitor at a certain temperature; (3) uniformly mixing to form an inhibitor powder; (4) weighing the inhibitor powder and water and thoroughly mixing same in a weight ratio of 1 : 1-8 to obtain an inhibitor solution; and (5) by the mass-volume ratio, uniformly spraying the inhibitor solution onto the surface of a coal sample in a ratio of 1 : 0.1-2.0. In a water evaporation stage, compared with raw dry lignite, the activation energy of the inhibited coal sample after being sprayed with the inhibitor solution is improved by 25% or more; in an oxygen absorbing oxidation stage, compared with the raw dry lignite, the activation energy is improved by 170% or more; the critical temperature for spontaneous combustion of the lignite can be increased to 136°C or more from about 75°C for the raw lignite, and thus the inhibition effect is significant. The inhibitor is economical, creates no pollution, is convenient to transport, simple to use and convenient to operate.
Inventors:
WU GUOGUANG (CN)
MENG XIANLIANG (CN)
CHU RUIZHI (CN)
LIU HUI (CN)
MENG XIANLIANG (CN)
CHU RUIZHI (CN)
LIU HUI (CN)
Application Number:
PCT/CN2015/098038
Publication Date:
May 04, 2017
Filing Date:
December 21, 2015
Export Citation:
Assignee:
UNIV CHINA MINING & TECH (CN)
International Classes:
C09K21/04
Foreign References:
| CN101487399A | 2009-07-22 | |||
| JPH01119242A | 1989-05-11 |
Other References:
ZHANG, WENYU ET AL.: "Experimental Study on Inhibition of Lignite Oxidation and Spontaneous Combustion by Composite Inhibitor", ENERGY TECHNOLOGY AND MANAGEMENT, vol. 40, no. 1, 28 February 2015 (2015-02-28), pages 132, ISSN: 1672-9943
HU , BINGCHENG ET AL.: "The Synthesis of Ammonium Low-Polysphate and Application in the Extinguishing Agent", EXPLOSIVE MATERIALS, vol. 6, no. 30, 31 December 2001 (2001-12-31), pages 31, ISSN: 1001-8352
HU , BINGCHENG ET AL.: "The Synthesis of Ammonium Low-Polysphate and Application in the Extinguishing Agent", EXPLOSIVE MATERIALS, vol. 6, no. 30, 31 December 2001 (2001-12-31), pages 31, ISSN: 1001-8352
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK OFFICE (ORDINARY PARTNERSHIP) (CN)
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