單元機(jī)組燃料控制系統(tǒng)分析

論文編號(hào):ZD1165   論文字?jǐn)?shù):17143,頁(yè)數(shù):31 附任務(wù)書(shū)，開(kāi)題報(bào)告，文獻(xiàn)綜述，外文翻譯

單元機(jī)組燃料控制系統(tǒng)分析
摘要
 燃料是指在燃燒過(guò)程中能夠產(chǎn)生熱量的物質(zhì)。電廠鍋爐是耗用大量燃料的動(dòng)力設(shè)備，燃料的性質(zhì)對(duì)鍋爐工作的安全性和經(jīng)濟(jì)性有重大的影響。對(duì)于不同的燃料，要采用不同的燃燒方式和燃燒設(shè)備。因此，對(duì)于鍋爐設(shè)計(jì)和運(yùn)行人員來(lái)說(shuō)，了解燃料的性質(zhì)和特點(diǎn)是很重要的。
 大型單元機(jī)組容量大，各部分之間聯(lián)系密切，相互影響很大，尤其是燃料品種的多變，投入燃料供給裝置的臺(tái)數(shù)不同等因素對(duì)系統(tǒng)的影響，因此一般需要單獨(dú)設(shè)計(jì)一個(gè)燃料量控制系統(tǒng)。
 鍋爐燃燒過(guò)程包括三個(gè)調(diào)節(jié)任務(wù)：即維持氣壓、保持最佳空燃比和保證爐膛負(fù)壓不變。與此相應(yīng)，有三個(gè)控制回路分別調(diào)節(jié)燃料量、送風(fēng)量、引風(fēng)量，從而構(gòu)成了多參數(shù)的燃燒過(guò)程控制系統(tǒng)。對(duì)于控制系統(tǒng)的選擇和燃料種類、燃燒設(shè)備以及鍋爐與汽輪機(jī)的連接運(yùn)行方式等有密切關(guān)系。
 

關(guān)鍵詞：燃料；鍋爐；汽輪機(jī)；協(xié)調(diào)控制系統(tǒng)；機(jī)爐控制系統(tǒng)；

THE ANALYSE OF FUEL CONTROL SYSTEM OF UNIT
Abstract
 Fuel is the matter that could product lots of heat energy when it burns. And boilers of the electricity power factory are the equipments that exhaust a great deal of fuel. The quality of the fuel is significant and vital effect on the boilers running safely and economically.
 It is necessary to choose different burning methods and sorts of burning equipment for kinds of fuel. Hence it is high time that the professional people to get the knowledge of fuel, including its distinguishing feature, quality and so on.
 Since the large-sized unit has been gradually used widely, and the every parts of the unit have close connection meanwhile they affect the others, it is necessary to design a control system to control the situation of the fuel.
 There are three modulating tasks in the burning of boiler, containing barometric pressure, maintain the fuel-air ratio control of combustion process, and hold the constant combustion chamber negative pressure.
 Corresponding to the three tasks, three control circuits control the quality of fuel, the quality of wind and Air quantity of blower, which constitutes the burning control system. It has closely connection to the fuel control system.
 

Keywords: fuel; boiler; steam turbine; Coordinated Control System; control system of boiler-turbine

目    錄
摘要  I
ABSTRACT II
1緒論 1
1.1課題背景 1
1.2單元機(jī)組自動(dòng)控制 1
1.2.1概述 1
1.2.2主要系統(tǒng)的功能及特點(diǎn) 2
1.2.2發(fā)展 3
2.協(xié)調(diào)控制系統(tǒng) 4
2.1協(xié)調(diào)控制系統(tǒng) 4
2.1.1協(xié)調(diào)控制的基本概念 4
2.1.2單元機(jī)組協(xié)調(diào)控制系統(tǒng)概述 5
2.1.3單元機(jī)組協(xié)調(diào)控制系統(tǒng)的基本要求 7
2.2機(jī)爐協(xié)調(diào)控制 9
2.2.1負(fù)荷管理控制中心功能 11
2.2.2機(jī)爐主控制器的主要功能 13
3.燃料控制系統(tǒng) 14
3.1燃料量控制系統(tǒng) 14
3.1.1.1燃料量調(diào)節(jié) 15
3.1.1.2燃料量指令限制回路 16
3.1.1.3 增益補(bǔ)償 19
3.1.2燃料主控制系統(tǒng) 21
3.1.2.1輸出限幅 24
3.1.2.2機(jī)組甩負(fù)荷 25
4結(jié)論 26
參考文獻(xiàn) 27