What about hydrogen sulfide gas leakage?

In case of hydrogen sulfide gas leakage, the personnel in the leaked contaminated area shall be evacuated to the upwind position immediately, and a small amount of leakage shall be initially isolated for 30m. The downwind position shall be evacuated during the day and at night100m. A large number of leaks, initially isolated 600 meters, evacuated 3500 meters during the day and 8000 meters at night.

In addition, the warning zone should be defined according to the influence area of gas diffusion, and irrelevant personnel should be evacuated to safety from crosswind and upwind. Eliminate all ignition sources (no smoking near the leakage area, eliminate all open flames, sparks or flames). All equipment shall be grounded during operation. Emergency personnel should wear positive pressure self-contained air respirator, and in case of leakage or fire, they should wear fully enclosed chemical protective clothing. Under the condition of ensuring safety, stop the leakage and isolate the leakage area until the gas is exhausted.

Typical example of hydrogen sulfide gas leakage

The hydrogen sulfide poisoning accident of Wengfu Dazhou Chemical Co., Ltd. 1 and "3.3" in Dazhou City, Sichuan Province

On March 3, 20 19, at about 5: 00 10, a hydrogen sulfide gas poisoning accident occurred in the phosphoric acid filling area of the logistics department of Wengfu Dazhou Chemical Co., Ltd., resulting in three deaths and three injuries.

According to the investigation, the direct cause of the accident is that there is still liquid residue in the transport vehicle after the navigation mark company (transport service provider of Wengfudazhou Chemical Co., Ltd.) transports liquid sodium sulfide. When the transport vehicle escorts use low-pressure steam to purge and clean the transport vehicle tank, the residual sodium sulfide in the vehicle flows into the trench with the sewage from the steaming tank, and reacts with the residual phosphoric acid in the trench to generate hydrogen sulfide gas, which causes inhalation poisoning of nearby personnel.

2. China Chemical Shenyang Paraffin Chemical Co., Ltd. "4.25" hydrogen sulfide poisoning accident.

On April 25th, 20 13, a poisoning accident occurred during the maintenance and construction of the gas separation unit of China Chemical Shenyang Paraffin Chemical Co., Ltd., resulting in three deaths. At the time of the incident, three workers were pumping and plugging the blind plate at the pump pressure relief blind plate, and three workers died of hydrogen sulfide poisoning due to improper protective measures.

Refer to the above? Baidu encyclopedia-hydrogen sulfide