Abstract: In order to reveal the influence law of emergency sprinkler water curtain on fire suppression effect in chemical gathering area under different working conditions, this paper establishes an FDS numerical model, simulates the fire development process under the opening and closing state of water curtain, the number of water curtain rows and the height of water curtain nozzle respectively by changing a single variable, and analyzes the change law of fire source temperature and the law of smoke spread under different working conditions. The results are as follows: after the sprinkler water curtain is opened, The peak temperature at the measuring point above the storage tank and behind the water curtain decreased by 19% and 36%, which can effectively inhibit the spread of high-temperature smoke layer; The double row water curtain is more effective than the single row water curtain in restraining fire source temperature and smoke spread; When the initial nozzle height is 5.8 m, compared with other heights, it has more advantages in reducing temperature and accelerating smoke sedimentation.

Key words: chemical agglomeration area, spray water curtain, smoke and thermal insulation, temperature peak