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| 折扣與優(yōu)惠：團(tuán)購(gòu)最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要:蒸餾操作是煉油、石化生產(chǎn)中一個(gè)十分重要的環(huán)節(jié)，蒸餾塔的控制直接影響到工廠的產(chǎn)品質(zhì)量、產(chǎn)量和能量的消耗。而作為蒸餾塔系統(tǒng)中一個(gè)重要的組成部分，回流罐的運(yùn)行情況直接影響著塔頂物料平衡，進(jìn)而影響整個(gè)精餾塔的運(yùn)行情況。因此，若回流罐系統(tǒng)的控制存在問(wèn)題，則將會(huì)對(duì)整個(gè)蒸餾塔的運(yùn)行造成不利的影響。本文采用西門子S7-200系列PLC對(duì)石油蒸餾塔的回流罐液位進(jìn)行控制，提高液位控制的準(zhǔn)確性和安全性，使液位達(dá)到較為理想的效果。結(jié)合模擬量模塊EM235、液位傳感器等，組成一個(gè)基于S7-200系列PLC的石油蒸餾塔回流罐液位控制系統(tǒng)，實(shí)現(xiàn)對(duì)回流罐液位的控制與檢測(cè)。在設(shè)計(jì)中運(yùn)用PLC中的PID來(lái)實(shí)現(xiàn)對(duì)液位的控制，建立起閉環(huán)控制系統(tǒng)。設(shè)計(jì)回流罐液位PID控制程序 ，采用組態(tài)王6.53軟件設(shè)計(jì)組態(tài)畫面，實(shí)現(xiàn)系統(tǒng)的模擬運(yùn)行與調(diào)試。 關(guān)鍵詞：可編程控制器(PLC)；回流罐液位；PID控制
Abstract:Distillation operation is a very important link in oil refining and petrochemical production. Distillation column control has the direct influence on the quality of plant products, production and consumption of energy. As one of the important part of the distillation system, situation of backflow can directly influence the material balance, which affects the operation of the whole of the column. Therefore, if the control of the backflow system exists problems, it will have an adverse influence on the distillation column operation. This paper adopts Siemens S7-200series PLC for backflow liquid level control, improve control accuracy and safety, so that the liquid level reaches the ideal effect. Combined with the analog module EM235, liquid level sensors, composed of a series of distillation column based on S7-200PLC constant liquid level control system, realize the backflow liquid level detection and control. In the design of the extensive use of PID in the PLC to achieve the level of control, establishment of closed loop control system. Design of reflux tank of liquid level control procedures PID and By Kingview 6.53software design configuration screen, the system simulation run and debug. Key words：Programmable Logic Controller(PLC); Backflow cans level; PID control
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