plc控制鍋爐輸煤系統(tǒng)設計

1、榆林學院本科畢業(yè)設計（論文）I1 摘 要本文基于北京和利時公司的HOLLiAS LM系列PLC，設計了某發(fā)電廠蒸發(fā)量為30t/ h的中型鍋爐輸煤控制電氣系統(tǒng)。各機械之間均設計安全的聯(lián)鎖保護控制功能：系統(tǒng)中的輸煤電機啟停有嚴格控制順序，彼此間有相應的聯(lián)鎖互動關系，當啟動某臺輸煤設備時，從該設備下面流程的最終輸煤設備開始向上逐級啟動，最后才能使該臺設備啟動；當停止某臺輸煤設備或某臺設備故障時，從該設備上面流程的源頭給煤設備開始向下逐級停機

2、，最后才能使該臺設備停止。這樣，就保證了上煤傳輸?shù)恼＿\行在線控制煤流量，避免了皮帶上煤的堆積，也保護了皮帶。PLC控制系統(tǒng)硬件設計布局合理，工作可靠，操作、維護方便，工作良好。用 PLC輸煤程控系統(tǒng)，不但實現(xiàn)了設備運行的自動化管理和監(jiān)控，提高了系統(tǒng)的可靠性和安全性，而且改善了工作環(huán)境，提高了企業(yè)經(jīng)濟效益和工作效率。因此PLC電氣控制系統(tǒng)具有一定的工程應用和推廣價值。關鍵詞： 關鍵詞： PLC，控制系統(tǒng)，煤流量，輸煤系統(tǒng)ABSTRACT

3、This paper takes HOLLiAS LM PLC as designed for a power output of boilers 30t/h medium-sized lost control of coal on the electrical system.The system can work reliably with property of easy operation and maintenance. Th

4、e safety locks protection control function:In the system of losing the coal electrical engineering have the strict control in moving and stopping, each other has the homologous lock interaction relation, being start s

5、ome set to lose the coal equipments, from that equipments below process of end lose the coal equipments start heading up pursue class start, then can make finally that set equipments start;When the stop some set loses th

6、e coal equipments or some set equipmentses to break down, from that equipments up the source head of the process starts get down for the coal equipments to pursue the class to park the car, then can make that set equipme

7、nts stop finally.Thus, guaranteed the normal movement that last coal deliver, avoid the leather belt up the pile up of coal, also protected the leather belt. Lose the coal distance to control the system with the PLC, not

8、 only carried out the automation management that equipments circulate and supervision, raise the 目錄 目錄摘要....................................................................................................................

9、....................................IABSTRACT..........................................................................................................................................II目錄 ................................

10、.....................................................................................................................III1 引言 ...............................................................................................

11、................................................12 輸煤系統(tǒng)控制原理 .......................................................................................................................23 輸煤系統(tǒng)設備選擇 .............................

12、..........................................................................................33.1 輸煤系統(tǒng)設備 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????33.

13、2 PLC 選型???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????33.3 輸煤機的選擇 ?????????????????????????????????????????????????????????????????????????????

14、??????????????????????????????????????33.4 破碎機的選擇 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????43.5 皮帶機的選擇 ???????????????????????????????????????????

15、????????????????????????????????????????????????????????????????????????43.6 熔斷器、電纜截面的選擇 ???????????????????????????????????????????????????????????????????????????????????????????????43.6.1 熔斷器的選擇 ......................

16、.................................................................................43.6.2 電纜面積的選擇 ...................................................................................................53.7 接觸器選擇 ??????????????

17、?????????????????????????????????????????????????????????????????????????????????????????????????????????63.8 壓力傳感器的選擇 ?????????????????????????????????????????????????????????????????????????????????????????????????????

18、??????74 輸煤系統(tǒng)控制方案 .......................................................................................................................84.1 系統(tǒng)結構 ?????????????????????????????????????????????????????????????????????????

19、??????????????????????????????????????????????????84.2 控制方式 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????84.3 事故處理 ???????????????????????????

20、????????????????????????????????????????????????????????????????????????????????????????????????84.4 輸煤系統(tǒng)控制要求 ???????????????????????????????????????????????????????????????????????????????????????????????????????????94.

21、5 輸煤工藝 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????94.6 輸煤系統(tǒng)流程 ??????????????????????????????????????????????????????????????????????????????

22、???????????????????????????????????105 控制設計 .....................................................................................................................................115.1 I/O 點分配??????????????????????????????

23、?????????????????????????????????????????????????????????????????????????????????????????115.2 PLC 接線???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

24、??115.3 設備主接線 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????125.4 繼電器系統(tǒng)接線 ???????????????????????????????????????????????????????????????????????????

25、??????????????????????????????????125.5 應用程序 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????145.6 程序仿真 ???????????????????????????????????????????

26、??????????????????????????????????????????????????????????????????????????????175.7 程序指令列表 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????206 總結 .........

27、....................................................................................................................................22參考文獻 .................................................................................