本文選題：循環(huán)冷卻水系統(tǒng)　切入點(diǎn)：安全　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：工業(yè)循環(huán)冷卻水系統(tǒng)作為主工藝生產(chǎn)的生命線,具有系統(tǒng)復(fù)雜、用戶多、水量大、循環(huán)水介質(zhì)種類多等特點(diǎn),對(duì)是維護(hù)設(shè)備正常運(yùn)行和保證生存安全至關(guān)重要,且系統(tǒng)能耗極高。在工業(yè)循環(huán)冷卻水系統(tǒng)設(shè)計(jì)過程中,充分考慮運(yùn)行安全、貫徹節(jié)能措施,開展安全與節(jié)能設(shè)計(jì),降低水系統(tǒng)的安全風(fēng)險(xiǎn)和電耗,將有助于提高整個(gè)項(xiàng)目的安全,有效控制整個(gè)項(xiàng)目的能耗。在分析工業(yè)循環(huán)冷卻水系統(tǒng)基本工作原理的基礎(chǔ)上,建立了工業(yè)循環(huán)冷卻水系統(tǒng)節(jié)能設(shè)計(jì)方法,提出了循環(huán)冷取水系統(tǒng)管路設(shè)計(jì)及設(shè)備選型對(duì)策;針對(duì)生產(chǎn)設(shè)備冷卻水系統(tǒng)水力不平衡問題提出來具體的解決方案;在分析冷卻塔冷卻效果不佳的原因的基礎(chǔ)上提出了改進(jìn)冷卻效果的設(shè)計(jì)對(duì)策;此外,還對(duì)循環(huán)水泵搶水級(jí)電機(jī)過載等提出了安全保障對(duì)策。主要結(jié)論包括:(1)針對(duì)逆流冷卻塔,建立了基于焓差法的熱力學(xué)模型,提出了基于數(shù)值積分的求解方法和冷卻塔冷卻數(shù)和特性數(shù)的計(jì)算方法,論述了填料特性和氣水比對(duì)冷卻效果的影響;(2)針對(duì)典型的冷卻設(shè)計(jì)要求,根據(jù)冷卻塔冷卻數(shù)和特性數(shù)曲線,提出了氣水比、空氣流量及填料體積的設(shè)計(jì)方法;在分析了蒸發(fā)、風(fēng)吹和排污損失水量等的影響因素的基礎(chǔ)上,提出了循環(huán)冷卻水系統(tǒng)補(bǔ)水量的計(jì)算方法和循環(huán)冷卻水系統(tǒng)中供水及送風(fēng)單元的設(shè)計(jì)方法。(3)從設(shè)計(jì)的角度分析了工業(yè)循環(huán)冷卻水系統(tǒng)常見的運(yùn)行問題及產(chǎn)生原因。認(rèn)為改進(jìn)配水系統(tǒng)和同程設(shè)置管路,可平衡冷卻水系統(tǒng)的水流量和水壓;合理確定冷卻塔填料的容積傳質(zhì)系數(shù)(kxv)和設(shè)置環(huán)狀網(wǎng),可改善冷卻塔的冷卻效果;增加冷卻水池容積或在系統(tǒng)回水主管管路末端設(shè)置緩閉式閥門,可解決集水池被抽空的問題;改善水泵吸水條件或合理確定水泵的開啟臺(tái)數(shù),可避免循環(huán)水泵搶水及電機(jī)過載問題。(4)基于工業(yè)循環(huán)冷卻水系統(tǒng)的循環(huán)水泵和風(fēng)機(jī)的動(dòng)力消耗討論,提出節(jié)能對(duì)策包括:對(duì)冷卻塔填料的熱力和阻力特性事先進(jìn)行系統(tǒng)的測試,對(duì)循環(huán)冷卻水系統(tǒng)進(jìn)行科學(xué)合理的優(yōu)化設(shè)計(jì);對(duì)于生產(chǎn)過程復(fù)雜的工業(yè)企業(yè),對(duì)循環(huán)冷卻水的余熱進(jìn)行全面合理的利用;采用變頻技術(shù)、節(jié)電設(shè)備和工藝和對(duì)循環(huán)冷卻水進(jìn)行防腐蝕和防結(jié)垢處理,實(shí)現(xiàn)動(dòng)力設(shè)備系統(tǒng)的節(jié)能運(yùn)行。
[Abstract]:As the lifeline of main process production, industrial circulating cooling water system has the characteristics of complex system, more users, large amount of water and many kinds of circulating water medium. It is very important to maintain the normal operation of equipment and ensure the safety of survival. And the system energy consumption is very high. In the design process of industrial circulating cooling water system, fully consider the operation safety, carry out energy-saving measures, carry out safety and energy saving design, reduce the safety risk and power consumption of water system, It will help to improve the safety of the whole project and effectively control the energy consumption of the whole project. Based on the analysis of the basic working principle of the industrial circulating cooling water system, the energy saving design method of the industrial circulating cooling water system is established. The pipeline design and equipment selection strategy of circulating cooling water system are put forward, and the concrete solution to the problem of hydraulic imbalance in cooling water system of production equipment is put forward. Based on the analysis of the reasons for the poor cooling effect of the cooling tower, the design countermeasures for improving the cooling effect are put forward, in addition, the safety and security countermeasures are put forward for the overload of the circulating water pump grade-level motor, etc. The main conclusions include: 1) the countercurrent cooling tower, The thermodynamic model based on enthalpy difference method is established, and the solution method based on numerical integration and the calculation method of cooling tower cooling number and characteristic number are put forward. According to the cooling number and characteristic number curve of cooling tower, the design method of air-water ratio, air flow rate and packing volume are put forward, and evaporation is analyzed. On the basis of the influence factors of wind blowing and water loss of sewage, This paper puts forward the calculation method of the supplementary water quantity in the circulating cooling water system and the design method of the water supply and air supply unit in the circulating cooling water system. From the design point of view, the common operation problems and the causes of the industrial circulating cooling water system are analyzed. ... Considering that the water distribution system should be improved and pipes should be arranged at the same time, The cooling efficiency of cooling tower can be improved by determining the volumetric mass transfer coefficient (KXV) of the packing of cooling tower reasonably and setting the annular net, which can balance the water flow and water pressure of the cooling water system. Increasing the volume of cooling water pool or setting a slow closed valve at the end of the system backwater main line can solve the problem that the collecting pool is emptied, improve the water absorption condition of the pump or reasonably determine the number of opening tables of the pump, On the basis of the discussion on the power consumption of circulating water pump and fan in industrial circulating cooling water system, the energy saving countermeasures are put forward, which include: testing the thermodynamic and resistance characteristics of cooling tower packing in advance. Scientific and reasonable optimization design of circulating cooling water system; comprehensive and reasonable utilization of waste heat of circulating cooling water for industrial enterprises with complex production process; use of frequency conversion technology, Energy-saving equipment and process and anti-corrosion and anti-scaling treatment of circulating cooling water are carried out to realize energy-saving operation of power equipment system.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU991.4

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