Coal underground gasification system and gasification method capable of realizing parallel transportation of multiple medium

• Main Authors: GUO KEJING, ZHANG XIANGFENG, XIA XIAOJUN, LI MINLI, XIAO DONG, FENG YUNCHAO, CHEN LI, SHEN ZHENKUN, WU PAN
• Format: Patent
• Language: Chinese; English
• Published: 02.03.2021
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a coal underground gasification system capable of realizing parallel transportation of multiple medium. The coal underground gasification system comprises a composite materialcontinuous pipe without disconnection, the front end of the composite material continuous pipe is connected with a gas-water mixing combustor, and the rear end of the composite material continuous pipe is connected with a well to-be-transported medium interface; the composite material continuous pipe comprises an outer pipe, wherein at least three inner pipes are distributed in a pipe cavity of the outer pipe; a filling body is arranged between each inner pipe and the corresponding outer pipe; the first inner pipe is a metal pipe, and a heat insulation layer is arranged on the outer wall of the first inner pipe; a pipe cavity of the first inner pipe is used as a liquid oxygen filling channel; the second inner pipe is a non-metal pipe; a pipe cavity of the second inner pipe serves as a water conveying channel; and