At present, with the rapid development of the hydrogen energy industry, especially in the demonstration application of commercial vehicles in the transportation field, a large amount of hydrogen refueling demand has been generatedTherefore, many places across the country have carried out the layout and planning of hydrogen refueling station construction. The construction of a large number of hydrogen refueling stations is also in full swing, and it is currently trapped by the imperfection of the standard system, the lack of operational experience and the inconsistency of the compliance processThere are many uncertainties and challenges in the safety management of hydrogen refueling stations。Therefore, we must attach great importance to the following three issues to ensure that the safety risks of hydrogen refueling stations can be effectively controlled.
The requirements for key equipment components are not in place
According to statistics,The top three equipment parts with the highest failure rate of hydrogen refueling stationsThey are:Compressors(diaphragm rupture, excessive leakage, no pressurization, high exhaust temperature, valve leakage, low oil pressure, high outlet pressure) faults accounted for 34%.valves(interface air leakage, internal leakage, can not be closed) fault accounted for 12%.Hydrogen refueling machine(air leakage, system failure, filter blockage) faults account for 10%, of which the compressor is the most prone to failure, and sometimes a problem of the O circle will lead to hydrogen leakage of the equipment, resulting in the suspension of the operation of the hydrogen refueling station.
The picture above shows the compressor O circle replaced by the compressor of the hydrogen refueling station, according to past experience, there may be 1 hydrogen leakage event per year due to the damage of the O ring that leads to the failure of the compressor, last year because of the first reason to purchase the O circle of the same model of different manufacturers, the compressor worked for half a year and failed, and the O ring was found to be seriously damaged after dismantling. ThereforeHydrogen refueling stations need to pay attention to the product quality and pressure redundancy of key fragile parts to ensure that hydrogen facilities can work effectivelyAny leak can lead to serious consequences such as fire**, and cannot be negligent.
Hydrogen leak detection is not in place
According to the "GB T 34584-2017 Safety Technical Specification for Hydrogen Refueling Stations", the combustible gas detection and alarm system in the hydrogen refueling station and various hydrogen refueling co-construction stations has detected that the hydrogen content in the air reaches 0When the hydrogen content in the air reaches 1%, the corresponding accident exhaust fan should be started, and when the hydrogen content in the air reaches 1., the hydrogen content in the air reaches 1At 6%, the emergency shut-off system of the hydrogen refueling station should be triggered.
In the actual management process, yesThere are situations where the hydrogen refueling station does not find the leakage in time due to the probe arrangement and environmental factorsand the extremely low concentration of the spill at the beginning of the hydrogen leak can lead to missed optimal disposal time if the alarm threshold is not reached or the probe is in a faulty state. Experiments have shown that when the concentration of hydrogen clouds exceeds 15%, there is a risk of **. ThereforeBeing able to detect hydrogen leaks in a timely manner is crucial to ensuring the safety of hydrogen refueling stations.
Hydrogen detectors are passive working equipment and are requiredRegularly use standard gas to test its effectiveness, and every year it is verified by a professional organization and an inspection report is issued。At the same time, on-site inspection also needs to be paid attention to, and it can be seen through quantitative simulation analysis that hydrogen leakage in the open air is irregular due to equipment barrier and weather factorsStaff are required to conduct regular inspections to confirm whether there are leaks at key locationsTo check the possible blind spots of the hydrogen detection system, it is necessary to rely on the hydrogen concentration monitoring system and personnel inspection to confirm the reliability of the on-site environment.
Inadequate control of relevant parties
During the operation of hydrogen refueling stations, it is common for equipment failures to need to be repaired on site, especially when fixed equipment such as compressors, hydrogen storage tanks, and hydrogen refueling machines cannot or is not easy to dismantle. Hydrogen refueling station managers should strictly manage the maintenance work in the station.
Chemical enterprises use the "Safety Code for Special Operations of Hazardous Chemicals Enterprises" (GB 30871-2022) to control dangerous operations such as hot work, climbing operation, temporary electricity use, circuit breaking operation, and hoisting operation. The hydrogen refueling station also recommends strict control of related dangerous construction operations in accordance with GB 30871, but in the actual work, due to the lack of hydrogen safety awareness of construction personnel, various violations will occur:
①.Use ferrous tools in the hydrogen area of the hydrogen refueling station;
②.Failure to wear anti-static clothing as required;
③.Unauthorized entry into hydrogen-related areas;
④.Dangerous operations are carried out without approval;
⑤.Carry the ignition source into the hydrogen-related area.
Therefore, it is necessary to carry out the following whole-process control for the construction of hydrogen refueling stations to ensure that the risks of the whole cycle are controllable:
Safety management is very important for the operation of hydrogen refueling stations, but the entire hydrogen refueling station industry lacks standards and operational practice experience support, and is prone to safety accidents, so it is more necessary for managers to attach great importance to the safety risk management and control of hydrogen refueling stations, and on January 17, Baoding will organize relevant courses on hydrogen refueling station safety management to share, and welcome industry partners to come and exchange together.
Workshop registration
Hydrogen partners:
Tehi Hydrogen Energy Testing will be held inFrom January 17th to January 18th, the "Experience Sharing Workshop on Operation, Maintenance and Safety Management of Hydrogen Supply Stations" was held。The workshop will invite the first batch of senior engineers, registered safety engineers, and practical experts engaged in hydrogen energy testing and evaluation in China to discuss the issues of concern to everyone2 days of professional training, answers and communication.
(Detailed course schedule).
How to register
Pay attention to Baijiahao's "Tehi Hydrogen Energy Testing".
Reply"Registration".
You can register according to the background prompts.