中文摘要：

为在化学工厂的设备分发的新途径基于设备和新奇有毒的煤气的分散限制的设计关系包括改进非重叠的限制被建议。在在植物布局模型的变量的大数字的考虑，我们的新方法能显著地他们的自己的设计关系地减少变量的数字。另外，同样有毒的煤气的分散是在一家化学工厂的一个平常的事件，描述煤气的漏的一条简单途径被建议，它能清楚地代表潜在的排放来源和坐的设备的限制。为解决植物布局模型，一个改进基因算法(GA ) 基于不能实行的答案改正技术被建议，它改进 GA 的地球搜索能力。一个更好的布局计划能与我们的方法被获得的案例研究和实验表演，和象煤气的分散和最小的距离罐头那样的安全因素很好在答案被处理。

英文摘要：

New approaches for facility distribution in chemical plants are proposed including an improved non-overlapping constraint based on projection relationships of facilities and a novel toxic gas dispersion constraint. In consideration of the large number of variables in the plant layout model, our new method can significantly reduce the number of variables with their own projection relationships. Also, as toxic gas dispersion is a usual incident in a chemical plant, a simple approach to describe the gas leakage is proposed, which can clearly represent the constraints of potential emission source and sitting facilities. For solving the plant layout model, an improved genetic algorithm （GA） based on infeasible solution fix technique is proposed, which improves the globe search ability of GA. The case study and experiment show that a better layout plan can be obtained with our method, and the safety factors such as gas dispersion and minimum distances can be well handled in the solution.