CN-120830800-B - Intelligent leakage monitoring and safe pressure relief system for underground gas storage of artificial lining chamber

CN120830800BCN 120830800 BCN120830800 BCN 120830800BCN-120830800-B

Abstract

The invention belongs to the technical field of renewable energy underground energy storage, and discloses an intelligent leakage monitoring and safe pressure relief system for an underground gas storage of an artificial lining chamber, which is used for realizing safe storage of the gas storage, hydrogen storage, carbon dioxide, natural gas and the like and fault alarming and danger removal; the converging module ensures that leakage gas and seepage water can be respectively led into the gas collecting pipe and the water collecting pipe through the converging pipe; the system comprises a pressure release and discharge module, an intelligent monitoring module and a water pump, wherein the pressure release and discharge module is used for conveying water seepage to the ground, the water discharge valve is opened in the construction period or the maintenance period and is matched with the water pump to pump and discharge the water seepage, and the intelligent monitoring module is used for providing remote data access and management. The invention is mainly applied to the design and manufacturing occasions of the gas storage places.

Inventors

SUN DONGMEI
Ren danyang
WANG CHENGLONG
QIU LE
YANG XUELEI

Assignees

天津大学

Dates

Publication Date: 20260508
Application Date: 20250625

Claims (2)

1. An artificial lining chamber underground gas storage intelligent leakage monitoring and safety pressure relief system is characterized by comprising: the pipe network module comprises drainage/air pipe networks which are arranged on the excavation surface of surrounding rock and embedded in the primary support concrete layer for collecting and conveying water seepage and leakage gas, the drainage/air pipe networks are formed into diamond-shaped net structures by pipes with sieve holes, the cross nodes are connected through four-way pipe fittings, a pressure sensor is arranged at each cross node, the water pressure and the air pressure in the pipes are measured in real time, and the change of the fluid pressure is monitored; the pipe network module is also provided with a time domain reflectometer TDR, a data line pipe and a data acquisition device, in the horizontal cylindrical chamber structure, the pressure sensors are uniformly distributed at intervals of preset angles in the circumferential direction, a monitoring section is axially and sectionally arranged at preset distances to form an equidistant three-dimensional monitoring network, the TDR is distributed at the position, which is close to the pressure sensors, outside the collecting pipe, and is matched with the drainage/gas pipe network and the collecting pipe for use in auxiliary judgment of leakage or structural abnormality, wherein the TDR transmits pulse electric signals to monitoring cables connected with the TDR, propagates along the lines, when the pipe network, the collecting pipe or the data lines are damaged, deformed or leaked, reflection signals are generated at abnormal points, the TDR detects the reflection waves, analyzes waveforms and delay time, and accordingly estimates the distance of the abnormal positions; The collecting pipe is arranged at the bottom of the longitudinal horizontal tunnel, the pipe diameter is also larger than the pipe diameter of the drainage/gas pipe network and is used for collecting seepage, the collecting pipe is arranged along the cross section surface of the tunnel and is communicated with the drainage/gas pipe network at intervals of a preset distance, the collecting pipe is structurally positioned between the drainage/gas pipe network and the collecting pipe, the upper part of the collecting pipe is inserted into a small hole of the collecting pipe, and the lower part of the collecting pipe is inserted into a small hole of the collecting pipe, so that the leakage gas and the seepage water can be respectively led into the collecting pipe and the collecting pipe through the collecting pipe; The pressure relief and emission module comprises an air duct, an exhaust valve, a drainage valve, an air flowmeter and an early warning device, wherein the air duct is communicated with the air collecting pipe and is used for conveying leakage air to the ground, the exhaust valve is automatically opened when the pressure of the leakage air reaches a set threshold value, the air flowmeter records the emission of the leakage air and is communicated with a monitoring system, the early warning device of the pressure relief and emission module is linked with the exhaust valve, an air leakage early warning signal is triggered when the exhaust valve is opened, and warning information is sent to a remote monitoring terminal, the air duct is communicated with the water collecting pipe and is used for conveying water seepage to the ground, and the drainage valve is opened in the construction period or the maintenance period and matched with a water pump to pump and drain the water seepage; The intelligent monitoring module comprises pressure sensors, a data processing and control unit, a data storage and communication unit and an early warning device, wherein the drainage/air pipe network is divided according to a modularized structure, the drainage/air pipe network between every two collecting pipes and the pressure sensors on cross nodes of the drainage/air pipe network form an independent monitoring module, fluid and air pressure data in a pipeline are collected in real time, the data processing and control unit carries out linkage analysis on pressure time sequence data based on a modularized analysis method, judges abnormal pressure change, identifies a leakage area and controls the opening of an exhaust valve to carry out pressure relief, the data storage and communication unit records leakage monitoring historical data and is connected with a cloud database to realize long-term trend analysis and risk early warning, remote data access and management are provided at the same time, and the early warning device of the intelligent monitoring module receives leakage alarm information of the data processing and control unit, triggers an audible and visual alarm signal and pushes alarm information to a remote monitoring terminal.
2. The intelligent leakage monitoring and safety pressure relief system for underground gas storage in an artificial lining chamber according to claim 1, wherein, The data line pipe uniformly guides the TDR of a plurality of monitoring nodes and the data lines of the pressure sensors to a data acquisition device at the top of the tunnel, and the data acquisition device transmits the data to the data processing and control unit; and positioning the air leakage point by using a Cross-Correlation analysis algorithm in the data processing and control unit.

Description

Intelligent leakage monitoring and safe pressure relief system for underground gas storage of artificial lining chamber Technical Field The invention belongs to the technical field of renewable energy underground energy storage, and particularly relates to an intelligent leakage monitoring and safe pressure relief system of an underground gas storage of a horizontal tunnel type artificial lining chamber. In particular to an intelligent leakage monitoring and safe pressure relief system for an underground gas storage of an artificial lining chamber. Background With the global push to renewable energy sources and low-carbon economy, energy storage technologies, especially compressed air energy storage, hydrogen energy storage, carbon dioxide capture and storage (CCS) technologies, are rapidly developing, and become an important component of the energy industry. However, gas storage libraries, hydrogen storage facilities and natural gas storage systems often face gas leakage problems during construction and operation, which not only reduce the gas storage efficiency, but may also cause non-negligible harm to the environment and surrounding personnel. For this reason, it is necessary to develop a system capable of timely finding and discharging the leaked gas to secure the operation safety and environmental safety of the energy storage facility. However, underground fully-artificial lined chamber reservoirs are at risk of gas leakage during construction and operation of the reservoirs, hydrogen storage facilities and natural gas storage systems. During construction, a large number of cracks and pores exist in the surrounding rock body, water seepage and accumulation are easy to cause, water pressure on the lining is increased, the water is infiltrated in the concrete pouring process, and if the water is not discharged in time, the construction quality and progress can be affected. During operation, however, gas may leak out of the gap between the seal layer and the surrounding rock, as the integrity of the seal layer may be affected by various factors, such as deformation of the surrounding rock, cracking of the lining, etc. The gas leakage not only can reduce the gas storage efficiency of the gas storage, but also can cause safety accidents, and the gas storage is harmful to the surrounding environment and personnel. In related researches, for the problems of water seepage accumulation and gas leakage of the underground full-artificial lining chamber gas storage, a blind ditch drainage method is widely adopted in the current engineering, namely, a broken stone filled groove is arranged between lining and surrounding rock to dredge water seepage. Although the method can relieve local water pressure, the method has the obvious defects that the blind drain depends on gravity to drain naturally, cannot be dynamically adjusted according to water pressure change, so that the lining bears periodic high pressure and accelerates fatigue cracking of concrete, the blind drain is easy to be silted by rock scraps, the lining is required to be locally broken and detached for dredging, the single maintenance cost is high, the drainage efficiency is reduced after repair, and the method is not very effective in the aspects of quick gas leakage positioning and treatment. The problems indicate that the prior art is difficult to meet the urgent requirements of the underground gas storage for intelligent monitoring, rapid pressure relief and modularized operation. An integrated system is needed, which can sense water pressure and leakage gas in real time, accurately position risk points, realize automatic pressure relief, and use a distributed drainage/air pipe network, so that local grid units are out of order, and the operation of the whole system is not affected. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide an intelligent leakage monitoring and safe pressure relief system for an underground gas storage of a horizontal tunnel type artificial lining chamber, which is particularly suitable for a plurality of fields such as gas storage, hydrogen storage, carbon dioxide, natural gas and the like. The system not only can effectively remove redundant water seepage and reduce surrounding rock pressure, but also can rapidly guide leakage gas to ground for discharge when gas leakage occurs in a gas storage and other energy storage facilities, accurately positions a leakage source and records leakage quantity, thereby ensuring environmental safety and promoting safe operation of new energy. Therefore, the technical scheme adopted by the invention is that the intelligent leakage monitoring and safe pressure relief system for the underground gas storage of the artificial lining chamber comprises the following components: the pipe network module comprises drainage/air pipe networks which are arranged on the excavation surface of surrounding rock and embedded in the primary support c