鍋爐爐前點火控制系統(tǒng)設(shè)計

電氣自動化論文編號:ZD1000    論文字數(shù):18093,頁數(shù):39  
 
 目 錄
摘要…………1
第一章  前言1
 1.1  選題背景與意義1
 1.2  國內(nèi)外鍋爐工業(yè)的現(xiàn)狀及發(fā)展1
 1.3  本章小結(jié)2
第二章  設(shè)計任務(wù)3
     2.1  設(shè)計題目.3
     2.2  設(shè)計要求.4
     2.3  設(shè)計方法.4
     2.4  技術(shù)路線. .5
     2.5  本章小結(jié) 5
第三章  鍋爐等離子點火的控制系統(tǒng)6
 3.1  設(shè)計原則6
 3.2  DCS簡介.6
    3.3  鍋爐等離子點火的控制系統(tǒng)7
 3.4就地點火控制系統(tǒng).17
第四章 系統(tǒng)投運后存在的問題以及處理19
 4.1 等離子點火系統(tǒng)冷卻水系統(tǒng)壓力不易調(diào)節(jié).19
 4.2 等離子水泵運行工況差.19
 4.3 等離子頻繁出現(xiàn)不起弧或斷弧.19
第五章  爐前點火控制系統(tǒng)的調(diào)試方案.21
 5.1調(diào)試的目的.21
 5.2調(diào)試前需要具備的條件.21
 5.3調(diào)試內(nèi)容.21
 5.4試驗方法.22
 5.5爐前點火系統(tǒng)點火應(yīng)該注意的安全事項.22
第六章  總結(jié)23
參考文獻.24
致謝25
附錄26.

摘  要
 點火系統(tǒng)的基本功能是依據(jù)發(fā)動機的工作順序適時的向發(fā)動機提供強烈的高壓火花。點火系統(tǒng)的功能體現(xiàn)在點火的時機和產(chǎn)生點火火花的強度。要實現(xiàn)直流電轉(zhuǎn)化為可以產(chǎn)生足夠強度火花的高壓電，只有采用變壓器通過次級線圈和初級線圈的較大比值來產(chǎn)生高壓電。
   鍋爐啟動及負荷助燃用油是構(gòu)成電場發(fā)電的重要組成部分，開發(fā)新技術(shù)降低發(fā)電成本是大型火力發(fā)電場一個迫在眉睫的問題，近年來隨著世界原油價格的上漲以及國內(nèi)電廠競爭的激烈，追求節(jié)約電廠鍋爐點火以及助燃用油的呼聲越來越高，無油燃燒點火系統(tǒng)勢在必行。
 本論文設(shè)計了等離子點火控制系統(tǒng)網(wǎng)絡(luò)，控制系統(tǒng)硬件配置，等離子發(fā)生器自動控制邏輯和等離子點火控制邏輯，控制系統(tǒng)與DCS系統(tǒng)的接口。還提出了一些投入運行所存在的問題以及解決的措施。本文設(shè)計的鍋爐點火控制系統(tǒng)，使工作人員不需要在現(xiàn)場操作設(shè)備使，只需要在控制室遠程控制系統(tǒng)運行以及監(jiān)視自動運行狀況。

關(guān)鍵詞：鍋爐; 點火系統(tǒng); 自動控制; DCS
 Abstract
 
The basic function of the ignition system is based on the work of the engine order of timely strong high pressure to the engine spark. Ignition system features embodied in the ignition spark ignition timing and intensity of production. To achieve direct current can generate enough strength into the high-voltage spark, and only through the use of transformer secondary coil and primary coil to produce a larger ratio of high voltage.
Fuel combustion boiler start and load electric power generation constitutes an important part of the development of new technology to reduce cost of electricity is an imminent large-scale thermal power generation market, in recent years as the world crude oil prices and fierce competition in the domestic power plant, the pursuit of save fuel combustion power plant boiler ignition and increasing demands, no oil burning ignition system is necessary.
In this thesis, the plasma ignition control system network, control system hardware configuration, plasma generator control logic and plasma ignition control logic, control system interfaces with the DCS system. Also made a number of the problems in operation, and Solutions. This design of the boiler ignition control system, so that staff do not need to operate the equipment in the field so, only in the control room remote control system operation and automatically monitor the situation.
Keywords：Boiler; Ignition system;  Automatic control;  DCS