锦纶聚合控制系统设计_下位机控制
锦纶聚合控制系统设计_下位机控制[20200108192806]
本课题的目的是通过SIEMENS S7-300 PLC实现对锦纶聚合过程的自动控制，突显PLC在工业控制领域的优越性。本文以淮安锦纶化纤有限公司锦纶聚合生产线为背景，详细介绍了锦纶聚合的熔融、搅拌、聚合和回收四个工艺段。通过对每个工艺段的分析，设计出了一套简单可行的控制方案。本文应用SIEMENS的S7-300 PLC对锦纶聚合四个工段进行系统软、硬件设计，结构清晰，在设计和仿真时易于检查和修改。在核心工段聚合工段中，对主要控制点聚合温度、聚合时间、阀门开度结合相应的生产要求采用PID控制方式，实现对控制点的准确控制。 *查看完整论文请+Q: 351916072
关键字:锦纶聚合,S7-300PLC,自动控制,PID控制
目 录
第1章 绪论·····························································1
1.1 锦纶简介·························································1
1.2 锦纶生产现状·····················································1
1.3 主要研究内容·····················································2
1.4 关键技术问题·····················································2
第2章 锦纶聚合工艺介绍及控制方案·······································3
2.1 熔融工段·························································3
2.2 搅拌工段·························································4
2.3 聚合工段·························································5
2.4 回收工段························································12
第3章 系统硬件设计····················································13
3.1 S7-300硬件组态·················································13
3.2 系统仪表选型····················································16
第4章 系统程序设计····················································19
4.1 程序项目建立····················································19
4.2 熔融工段程序设计··············································22
4.3 搅拌工段程序设计··············································24
4.4 聚合工段程序设计·············································27
4.5 回收工段程序设计··············································33
结论···································································35
致谢···································································36
参考文献·······························································37
附录······························································38
1 绪论
1.1 锦纶简介
锦纶（nylon），也称尼龙，在中国所有的聚酰胺类纤维都成为锦纶。它性能优越，生产原料资源丰富，一直在世界范围内广泛使用。锦纶的品种有很多，比如锦纶6、锦纶66、锦纶11、锦纶610系列等，其中以锦纶66和锦纶6为主。锦纶在民用上主要是用于制造强力丝，袜子、内衣、运动衫等都是用强力丝制造的。锦纶在工业上的使用也很广泛，比如轮胎帘子线、降落伞、渔网、绳索的生产都是以锦纶为原材料。锦纶与尼龙相比，其热性能好，纤维承载力大，阻燃性和阻隔性都比较高，成本却和普通尼龙相当[5]。此次课题是以在淮安锦纶化纤有限公司的实习为背景，淮安锦纶化纤有限公司位于周总理的故乡江苏省淮安市，由浙江金轮集团在淮安投资建设，公司投资总额将近2.17亿元，占地500多亩。通过在淮安锦纶化纤有限公司为期三个月的实习，对锦纶聚合的工艺流程有了充分的认识，也为研究本课题带来了便利。
1.2 锦纶生产现状
1.2.1 国外锦纶的生产现状
一直以来，锦纶的生产能力是衡量一个国家经济水平和科技水平的重要指标。纵观目前锦纶的主要产地，都集中在发达国家，其中以美国、日本和欧洲等国家为主。这些国家锦纶的生产都呈现出规模化、高性能化、高科技化，营销网络也比较完善。目前，国外锦纶生产企业生产能力最大可达50kt/a，产品质量稳定，主要用于纺丝生产。表1-1是国外锦纶主要的生产厂家和生产现状[7]。
表1-1 国外锦纶生产现状
公司名称 主要产品型号 生产能力/(kt/a)
巴斯夫 PA6, PA66 285
罗地亚 PA6, PA66 210
霍尼韦尔 PA6,RX66 150
宇部兴产 PA6, PA66 80
DSM PA6、PA66 75
拜尔 PA6、PA66 65
Radici PA6、PA66 60
1.2.2 国内锦纶的生产现状
在国内，由于国家大力发展工业，锦纶生产技术和能力也得到了相应的提高，目前生产能力已达185kt/a。但是由于生产技术的不成熟，生产设备也大多靠引进国外的设备，所以在国内只有较少的企业能实现产品的多样化和高性能化，生产的产品也大多在国内的市场销售。表1-2是国内主要的锦纶生产厂家及能力。
表1-2国内主锦纶生产现状
生产厂家生产指标/(kt/a)技术来源
本课题的目的是通过SIEMENS S7-300 PLC实现对锦纶聚合过程的自动控制，突显PLC在工业控制领域的优越性。本文以淮安锦纶化纤有限公司锦纶聚合生产线为背景，详细介绍了锦纶聚合的熔融、搅拌、聚合和回收四个工艺段。通过对每个工艺段的分析，设计出了一套简单可行的控制方案。本文应用SIEMENS的S7-300 PLC对锦纶聚合四个工段进行系统软、硬件设计，结构清晰，在设计和仿真时易于检查和修改。在核心工段聚合工段中，对主要控制点聚合温度、聚合时间、阀门开度结合相应的生产要求采用PID控制方式，实现对控制点的准确控制。 *查看完整论文请+Q: 351916072
关键字:锦纶聚合,S7-300PLC,自动控制,PID控制
目 录
第1章 绪论·····························································1
1.1 锦纶简介·························································1
1.2 锦纶生产现状·····················································1
1.3 主要研究内容·····················································2
1.4 关键技术问题·····················································2
第2章 锦纶聚合工艺介绍及控制方案·······································3
2.1 熔融工段·························································3
2.2 搅拌工段·························································4
2.3 聚合工段·························································5
2.4 回收工段························································12
第3章 系统硬件设计····················································13
3.1 S7-300硬件组态·················································13
3.2 系统仪表选型····················································16
第4章 系统程序设计····················································19
4.1 程序项目建立····················································19
4.2 熔融工段程序设计··············································22
4.3 搅拌工段程序设计··············································24
4.4 聚合工段程序设计·············································27
4.5 回收工段程序设计··············································33
结论···································································35
致谢···································································36
参考文献·······························································37
附录······························································38
1 绪论
1.1 锦纶简介
锦纶（nylon），也称尼龙，在中国所有的聚酰胺类纤维都成为锦纶。它性能优越，生产原料资源丰富，一直在世界范围内广泛使用。锦纶的品种有很多，比如锦纶6、锦纶66、锦纶11、锦纶610系列等，其中以锦纶66和锦纶6为主。锦纶在民用上主要是用于制造强力丝，袜子、内衣、运动衫等都是用强力丝制造的。锦纶在工业上的使用也很广泛，比如轮胎帘子线
1.2 锦纶生产现状
1.2.1 国外锦纶的生产现状
一直以来，锦纶的生产能力是衡量一个国家经济水平和科技水平的重要指标。纵观目前锦纶的主要产地，都集中在发达国家，其中以美国、日本和欧洲等国家为主。这些国家锦纶的生产都呈现出规模化、高性能化、高科技化，营销网络也比较完善。目前，国外锦纶生产企业生产能力最大可达50kt/a，产品质量稳定，主要用于纺丝生产。表1-1是国外锦纶主要的生产厂家和生产现状[7]。
表1-1 国外锦纶生产现状
公司名称 主要产品型号 生产能力/(kt/a)
巴斯夫 PA6, PA66 285
罗地亚 PA6, PA66 210
霍尼韦尔 PA6,RX66 150
宇部兴产 PA6, PA66 80
DSM PA6、PA66 75
拜尔 PA6、PA66 65
Radici PA6、PA66 60
1.2.2 国内锦纶的生产现状
在国内，由于国家大力发展工业，锦纶生产技术和能力也得到了相应的提高，目前生产能力已达185kt/a。但是由于生产技术的不成熟，生产设备也大多靠引进国外的设备，所以在国内只有较少的企业能实现产品的多样化和高性能化，生产的产品也大多在国内的市场销售。表1-2是国内主要的锦纶生产厂家及能力。
表1-2国内主锦纶生产现状
生产厂家生产指标/(kt/a)技术来源
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