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[摘 要]某阳光能源科技有限公司拟建3GW硅片及600 MW组件项目,该项目建设在一个封闭的工业厂房内,分割为多个功能区,主要功能区工艺区、实验测试区为洁净区域。中央空调控制系统采用PLC控制,每个空调系统或冷却设备系统设1套S7-1200PLC,共计设23套PLC站,设1套操作員站、一套工程师站。PLC站、操作员站及工程师站通过工业以太网连接起来,实现对厂房的温度、湿度控制,实现对工艺冷却水系统、换热系统、开式冷却塔系统、闭式冷却塔系统的控制,实现冷冻水、热水系统、工艺冷却水系统、剖方机工艺冷却水系统、压缩空气系统、氩气系统和真空清扫系统经济可靠运行。
[关键词]PLC;变频器;PID;操作员站;工程师站
[中图分类号]TM76 [文献标志码]A [文章编号]2095–6487(2020)03–00–03
[Abstract]A Sunshine Energy Technology Co., Ltd. plans to build a 3GW silicon wafer and 600 MW module project; the project is built in a closed industrial plant; it is divided into multiple functional areas; the main functional area, the process area and the experimental test area are clean areas; The central air-conditioning control system adopts PLC control; each air-conditioning system or cooling equipment system is equipped with 1 set of S7-1200PLC, a total of 23 sets of PLC stations, 1 set of operator stations, 1 set of engineer stations; PLC stations, operator stations and engineers The stations are connected through industrial Ethernet; realize the temperature and humidity control of the plant; realize the control of the process cooling water system, heat exchange system, open cooling tower system, and closed cooling tower system; realize chilled water, hot water system, Process cooling water system, cutting machine process cooling water system, compressed air system, argon system and vacuum cleaning system are economical and reliable operation.
[Keywords]PLC; frequency converter; PID; operator station; engineer station
1 项目概况
某公司一期项目设有空调系统、新风系统、热水系统、废水系统、纯水系统、冷冻水系统,冷却水系统(铸锭炉工艺冷却水系统,剖方机工艺冷却水系统),空调系统有办公区空调,设风机盘管+独立新风的舒适性空调系统,采用两管制系统。生产区空调,生产区全部采用全空气空调系统,根据工艺划分为多晶、磨面抛光区、洗锭、坩埚脱模、喷涂、清洗车间5个空调分区。洁净区空调,洁净区全部采用全空气空调系统,根据工艺划分为4个空调分区。对空调自控要求通风、空调系统的启、停控制及其状态显示,风机盘管的室温控制及其风机风速控制,空调机组变频及送风温、湿度,房间温湿度、正压,机械排烟系统的消防联动控制。
2 动力暖通系统设计说明
2.1空调及工艺冷却系统配置控制要求
(1)开式冷却塔控制.通过开式冷却塔出水主管上温度传感器T1监测温度控制冷却塔风扇的启停,当出水管水温T1低于27℃(可调)时关闭一台风扇。当出水温度高于31度时开启一台已关闭的风扇,控制反馈延迟30S。冷却塔出水温度T1低于24℃(可调)时,缓慢开启冷却塔供回水之间电动调节旁通阀,反之,缓慢关闭电动调节阀。控制反馈延迟5s。
(2)闭式冷却塔控制。根据闭式冷却塔出水管上温度传感器T2、T3检测温度控制冷却塔风扇变频和启停:当出水管水温低于24度时,变频降低风扇转速,反之,升高风扇转速。当出水管温度低于23℃时关闭所有喷淋泵,当出水管温度高于25℃时开启所有喷淋泵,控制反馈延迟15s。
(3)冷冻机控制.冷冻机根据总负载量判断开启冷冻机台数,当某台冷冻机进入待机状态时,依次延迟关闭对应冷冻水泵及冷却水泵,延迟时间根据冷冻机产品要求,冷冻机开启前,先启动对应冷却水泵和冷冻水泵。
(4)板换温度控制。根据二次侧出水管上温度传感器T4、T5检测温度控一次侧回水管上电动三通阀开度,二次侧回水温度低于25 ℃时,缓慢调节电动三通阀开启方向,维持二次侧出水温度在25 ℃。
(5)工艺冷却水泵控制。通过供水管上的压力传感器压力值与设定值比较,控制水泵变频,维持出水压力在设定值。
[关键词]PLC;变频器;PID;操作员站;工程师站
[中图分类号]TM76 [文献标志码]A [文章编号]2095–6487(2020)03–00–03
[Abstract]A Sunshine Energy Technology Co., Ltd. plans to build a 3GW silicon wafer and 600 MW module project; the project is built in a closed industrial plant; it is divided into multiple functional areas; the main functional area, the process area and the experimental test area are clean areas; The central air-conditioning control system adopts PLC control; each air-conditioning system or cooling equipment system is equipped with 1 set of S7-1200PLC, a total of 23 sets of PLC stations, 1 set of operator stations, 1 set of engineer stations; PLC stations, operator stations and engineers The stations are connected through industrial Ethernet; realize the temperature and humidity control of the plant; realize the control of the process cooling water system, heat exchange system, open cooling tower system, and closed cooling tower system; realize chilled water, hot water system, Process cooling water system, cutting machine process cooling water system, compressed air system, argon system and vacuum cleaning system are economical and reliable operation.
[Keywords]PLC; frequency converter; PID; operator station; engineer station
1 项目概况
某公司一期项目设有空调系统、新风系统、热水系统、废水系统、纯水系统、冷冻水系统,冷却水系统(铸锭炉工艺冷却水系统,剖方机工艺冷却水系统),空调系统有办公区空调,设风机盘管+独立新风的舒适性空调系统,采用两管制系统。生产区空调,生产区全部采用全空气空调系统,根据工艺划分为多晶、磨面抛光区、洗锭、坩埚脱模、喷涂、清洗车间5个空调分区。洁净区空调,洁净区全部采用全空气空调系统,根据工艺划分为4个空调分区。对空调自控要求通风、空调系统的启、停控制及其状态显示,风机盘管的室温控制及其风机风速控制,空调机组变频及送风温、湿度,房间温湿度、正压,机械排烟系统的消防联动控制。
2 动力暖通系统设计说明
2.1空调及工艺冷却系统配置控制要求
(1)开式冷却塔控制.通过开式冷却塔出水主管上温度传感器T1监测温度控制冷却塔风扇的启停,当出水管水温T1低于27℃(可调)时关闭一台风扇。当出水温度高于31度时开启一台已关闭的风扇,控制反馈延迟30S。冷却塔出水温度T1低于24℃(可调)时,缓慢开启冷却塔供回水之间电动调节旁通阀,反之,缓慢关闭电动调节阀。控制反馈延迟5s。
(2)闭式冷却塔控制。根据闭式冷却塔出水管上温度传感器T2、T3检测温度控制冷却塔风扇变频和启停:当出水管水温低于24度时,变频降低风扇转速,反之,升高风扇转速。当出水管温度低于23℃时关闭所有喷淋泵,当出水管温度高于25℃时开启所有喷淋泵,控制反馈延迟15s。
(3)冷冻机控制.冷冻机根据总负载量判断开启冷冻机台数,当某台冷冻机进入待机状态时,依次延迟关闭对应冷冻水泵及冷却水泵,延迟时间根据冷冻机产品要求,冷冻机开启前,先启动对应冷却水泵和冷冻水泵。
(4)板换温度控制。根据二次侧出水管上温度传感器T4、T5检测温度控一次侧回水管上电动三通阀开度,二次侧回水温度低于25 ℃时,缓慢调节电动三通阀开启方向,维持二次侧出水温度在25 ℃。
(5)工艺冷却水泵控制。通过供水管上的压力传感器压力值与设定值比较,控制水泵变频,维持出水压力在设定值。