关键词: 卡琳娜低温热发电装置, 氨泄漏, 高斯烟羽扩散模型, MATLAB, 扩散模拟, 危害评估

Abstract: Petrochemical industry produces a lot of waste heat with low utilization efficiency. The waste heat recovery unit of an aromatics complex plant adopted Kalina low temperature waste heat generator set for the first time which used the low temperature waste heat from the main unit. The Kalina cycle uses high toxic ammonia as circulating working fluid and takes the ammonia cycle process of low temperature waste heat power generation system as the main line. Based on Gaussian smoke plume diffusion model, MATLAB is adopted to simulate and calculate the leakage of low pressure and high pressure in ammonia cycle and analyzes the concentration distribution after ammonia leakage. The paper calculates the personnel poisoning hazard area in the downwind direction of ammonia leakage and simulates the distance between safe area, slight wound area, severe injury area and dead area after ammonia leakage. These provide reference for emergency response measures that can be taken for correct handling of accidents.

Key words: Low temperature power generation system with kalina cycle , ammonia leak, Gaussian smoke plume diffusion model, MATLAB diffusion simulation, hazard assement