The utility model discloses a control device for the one key feeding of the precipitate trough in the polymerization production, especially the flushing, feeding and washing process which is frequently carried out in the process of the precipitating trough A/B feeding process to the DCS control device. The control device for the one key feeding of the precipitate trough is to pour the slurry in the precipitate slot to the B unit of the precipitation trough. The large water irrigation device is connected with the feeding device, the monomer recovery unit is connected with two precipitation tanks, the slurry in the sink B is reproduced to the stripping feeding device, and the reverse valve and the monomer recovery valve are added, according to the manual and automatic switching required by the production, one key start or real-time suspension and suspension of the control device are carried out. At the end of the line, the position of all control valves is reset to the initial state, which makes the device achieve the ideal control standard. At the same time, it also has the advantages of convenient and quick operation, and realizes the advantages of the one key feeding automatic control device in the key process of the precipitation trough. The utility model can be widely used in the control device of different chemical industry domain equipment.
【技术实现步骤摘要】
一种聚合生产中沉析槽一键倒料的控制装置
本技术涉及自动化控制领域一种聚合生产中沉析槽倒料操作的控制装置,尤其是对沉析槽一键倒料的DCS控制装置。
技术介绍
目前,公知的聚氯乙烯生产中聚氯乙烯出料生产工艺技术已经很成熟,主要出料工艺流程为:聚合釜出料包括由聚合釜出料泵送PVC浆料到沉析槽A,再从沉析槽A倒料到沉析槽B,冲洗聚合釜移出全部树脂颗粒,回收聚合釜内及沉析槽A/B中未反应的单体至压缩冷凝工序,再将浆料送至汽提工序。当沉析槽A倒料到沉析槽B过程,两槽压力、槽液位以及两槽回收压力的控制都是在倒料过程中同时进行的。当聚合釜内浆料反应为合格浆料,每个班次都会进行两个沉析槽A/B间至汽提十次左右的倒料。上述工艺过程多采用DCS集散控制系统控制,DCS集散控制系统由硬件和软件构成,其中硬件包括现场控制站、操作站、工程师站、通讯网线等;软件包括操作系统平台及工业控制用的DCS组态软件,所用DCS硬件配置及软件配置各有不同,其中两个沉析槽间的倒料操作为操作环节的关键因素,如日本横河CENTUM-CS3000DCS集散控制系统亦可用于此聚合生产中沉析槽倒料生产过程控制,上述技术直接应用于沉析槽倒料过程中的处理工艺及其控制。主要存在如下问题:1、倒料开始时,沉析槽所倒浆料较为粘稠,经常堵料,并且下料阀开启时间缓慢,2分钟才能打开,造成倒料泵空转,易损坏倒料泵;2、当沉析槽压力异常进行单体回收操作时,有时可能会将压缩冷凝后序工序物质反窜入沉析槽内,造成产品质量超标;3、原沉析槽A/B的操作为手动操作,且操作过程中具备水量冲洗时间、槽压力与液位、回收压力的判断,操作频繁,操 ...
【技术保护点】
1.一种聚合生产中沉析槽一键倒料的控制装置,由DCS控制原沉析槽A/B两槽倒料的手动操作过程冲洗→倒料→冲洗过程及人为判断操作改为DCS自动控制完成,其特征在于:该沉析槽一键倒料的控制装置包括沉析槽A倒料装置、沉析槽B倒料装置、大水量冲洗装置、倒料装置、回收装置、汽提入料装置;所述沉析槽A倒料装置具有沉析槽A下料管,沉析槽A下料阀,沉析槽A搅拌,沉析槽A,沉析槽A压力二次远传,沉析槽A液位二次远传;所述沉析槽B倒料装置具有沉析槽B下料管,沉析槽B下料阀,沉析槽B搅拌,沉析槽B,沉析槽B入料阀,沉析槽B压力二次远传,沉析槽B液位二次远传;所述大水量冲洗装置具有大水量冲洗管线,大水量冲洗泵,大水量冲洗水阀;所述倒料装置具有倒料止逆阀,倒料泵;所述回收装置具有沉析槽A单体回收阀,沉析槽A单体回收止逆阀,沉析槽B单体回收阀,沉析槽B单体回收止逆阀,压缩冷凝工序;所述汽提入料装置具有汽提入料泵,汽提入料备泵,汽提工序;上述沉析槽A倒料装置中以沉析槽A为中心,其下部安装有沉析槽A下料管,沉析槽A下料阀,沉析槽A搅拌,沉析槽A槽体上部安装有压力二次远传和液位二次远传装置;上述沉析槽B倒料装置中以沉析 ...
【技术特征摘要】
1.一种聚合生产中沉析槽一键倒料的控制装置,由DCS控制原沉析槽A/B两槽倒料的手动操作过程冲洗→倒料→冲洗过程及人为判断操作改为DCS自动控制完成,其特征在于:该沉析槽一键倒料的控制装置包括沉析槽A倒料装置、沉析槽B倒料装置、大水量冲洗装置、倒料装置、回收装置、汽提入料装置;所述沉析槽A倒料装置具有沉析槽A下料管,沉析槽A下料阀,沉析槽A搅拌,沉析槽A,沉析槽A压力二次远传,沉析槽A液位二次远传;所述沉析槽B倒料装置具有沉析槽B下料管,沉析槽B下料阀,沉析槽B搅拌,沉析槽B,沉析槽B入料阀,沉析槽B压力二次远传,沉析槽B液位二次远传;所述大水量冲洗装置具有大水量冲洗管线,大水量冲洗泵,大水量冲洗水阀;所述倒料装置具有倒料止逆阀,倒料泵;所述回收装置具有沉析槽A单体回收阀,沉析槽A单体回收止逆阀,沉析槽B单体回收阀,沉析槽B单体回收止逆阀,压缩冷凝工序;所述汽提入料装置具有汽提入料泵,汽提入料备泵,汽提工序;上述沉析槽A倒料装置中以沉析槽A为中心,其下部安装有沉析槽A下料管,沉析槽A下料阀,沉析槽A搅拌,沉析槽A槽体上部安装有压力二次远传和液位二次远传装置;上述沉析槽B倒料装置中以沉析槽B为中心,其下部安装有沉析槽B下料管,沉析槽B下料阀,沉析槽B搅拌,沉析槽B顶部有...
【专利技术属性】
技术研发人员:李春江,朱江军,周红燕,张良,杨金,
申请(专利权)人:石河子天域新实化工有限公司,新疆天业集团有限公司,
类型:新型
国别省市:新疆,65
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