Coal gas drainage system capable of recovering gas in centralized manner

The utility model discloses a coal gas drainage system capable of recovering gas in a centralized mode, which comprises a coal gas drainer, an anti-leakage device, a gas recovery device, an induced draft fan and a gas purification device, and the anti-leakage device is respectively communicated with the coal gas drainer and the gas recovery device. And the induced draft fan is respectively communicated with the gas recovery device and the gas purification device. According to the system, leaked gas pollutants can be collected and purified when the gas drainer leaks, so that the problem of environmental pollution caused by leakage of pollutants in gas in a dissipation or breakdown state is solved, and the maintenance and inspection of the gas drainer are not influenced. 本实用新型公开了一种可集中回收气体的煤气排水系统，该系统包括煤气排水器、防泄露装置、气体回收装置、引风机和气体净化装置，所述防泄露装置分别与煤气排水器和气体回收装置连通，所述引风机分别与气体回收装置和气体净化装置连通。本系统在煤气排水器发生泄漏时可以对泄漏气体污染物进行收集，并且对气体污染物进行净化处理，解决因煤气中污染物的逸散或者击穿状态下的泄漏带来的环境污染，并且不影响对煤气排水器进行检修和巡检。