本文選題：透平壓縮機(jī) + ITCC��； 參考：《華東理工大學(xué)》2012年碩士論文

【摘要】：當(dāng)今,離心式壓縮機(jī)是在石油化工和天然氣輸送等企業(yè)部門得到廣泛應(yīng)用的關(guān)鍵設(shè)備之一。因此,離心式壓縮機(jī)的安全運行極其重要,但是離心式壓縮機(jī)的喘振是影響此指標(biāo)的極大危害因素。所以,為了保證壓縮機(jī)能夠安全運轉(zhuǎn),對離心式壓縮機(jī)進(jìn)行防喘振控制非常重要。本文針對離心式壓縮機(jī)易發(fā)生喘振現(xiàn)象,利用ITCC防喘振技術(shù)來判斷是否發(fā)生喘振。通過防喘振控制器的輸出來控制回流閥的開度,通過控制回流閥的開度的大小使工藝過程保持穩(wěn)定狀態(tài)。 本文也針對原有制造商提供的絕對參數(shù)性能曲線不能反映進(jìn)出口氣體條件的變化對進(jìn)口流量的影響這個問題,運用相似化原理對壓縮機(jī)參數(shù)進(jìn)行相似化處理,利用相似性原理,將壓縮機(jī)的性能曲線轉(zhuǎn)化成不受進(jìn)氣狀態(tài)影響的通用性能曲線。轉(zhuǎn)換后的通用性能曲線形狀類似于原始曲線。因此,轉(zhuǎn)化后的喘振點的變化軌跡大致也是一條二次拋物線。這樣就可以確定一條與喘振界線平行的防喘振控制線,來控制防喘振閥的開啟。從而保證壓縮機(jī)流量大于正常工作時的最小流量,避免了壓縮機(jī)發(fā)生喘振,實現(xiàn)了喘振線PID控制。 在本系統(tǒng)中,采用TRICONEX公司生產(chǎn)的TRICON三重冗余容錯結(jié)構(gòu)的控制器作為下位控制系統(tǒng)。論文將修正后的性能曲線嵌入至(?)TRICONEX的ITCC中的防喘振模塊中進(jìn)行應(yīng)用,實現(xiàn)了對丙烯制冷壓縮機(jī)的防喘振控制。
[Abstract]:Nowadays, centrifugal compressor is one of the key equipments widely used in petrochemical and natural gas transportation enterprises. Therefore, the safe operation of centrifugal compressor is extremely important, but the surge of centrifugal compressor is the most harmful factor affecting this index. Therefore, in order to ensure the compressor can run safely, anti-surge control of centrifugal compressor is very important. Aiming at the surge phenomenon of centrifugal compressor, this paper uses ITCC anti-surge technology to judge whether surge occurs or not. The opening of backflow valve is controlled by output of anti-surge controller, and the process is kept stable by controlling the opening of backflow valve. This paper also aims at the problem that the absolute parameter performance curve provided by the original manufacturer can not reflect the influence of the change of import and export gas condition on the inlet flow rate. The similarity principle is used to treat the compressor parameters, and the similarity principle is used to treat the compressor parameters. The compressor performance curve is transformed into a general performance curve which is not affected by the intake state. The converted general performance curve is similar in shape to the original curve. Therefore, the trajectory of the transformed surge point is approximately a quadratic parabola. Thus, an anti-surge control line parallel to the surge line can be determined to control the opening of the anti-surge valve. Thus, the compressor flow rate is larger than the minimum flow rate in normal operation, the compressor surge is avoided, and the surge line pid control is realized. In this system, the triple redundancy fault-tolerant structure of Tricon produced by TRICONEX is used as the lower control system. In this paper, the modified performance curve is embedded in the anti-surge module of TRICONEX ITCC, and the anti-surge control of propylene refrigeration compressor is realized.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH452

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