發(fā)布時(shí)間：2018-07-02 09:19

  本文選題：高架火炬 + 安全距離��； 參考：《華南理工大學(xué)》2013年碩士論文

【摘要】：高架火炬是石化企業(yè)中最常用的一種安全保障設(shè)施。高架火炬安全距離的大小直接關(guān)系到石化企業(yè)的建設(shè)投資、土地資源。國(guó)內(nèi)外沒(méi)有一個(gè)統(tǒng)一且公認(rèn)精準(zhǔn)的高架火炬安全距離的計(jì)算方法，因此研究如何能夠在保證安全的前提下科學(xué)合理的確定高架火炬的最小安全距離，為完善有關(guān)高架火炬安全距離確定方法的規(guī)范提供相關(guān)依據(jù)具有重要意義。 本文在高架火炬射流火焰模擬實(shí)驗(yàn)研究和對(duì)比常見(jiàn)高架火炬安全距離確定方法的基礎(chǔ)上，建立了基于分區(qū)域的多點(diǎn)源的高架火炬安全距離計(jì)算模型，并利用CFD技術(shù)對(duì)高架火炬射流火焰進(jìn)行數(shù)值模擬分析。主要研究?jī)?nèi)容如下： （1）高架火炬射流火焰特性研究。通過(guò)建立高架火炬射流火焰小尺寸實(shí)驗(yàn)平臺(tái)，分析了高架火炬中射流火焰的特性，即火焰幾何特性、火焰溫度、火焰熱輻射分布等規(guī)律，并對(duì)不同風(fēng)速條件下，射流火焰傾斜角度變化規(guī)律進(jìn)行了研究，為后續(xù)合理地提出新的高架火炬安全距離計(jì)算模型提供依據(jù)，以及為檢驗(yàn)數(shù)值模擬結(jié)果的合理性提供對(duì)比參考。 （2）建立基于分區(qū)域的多點(diǎn)源高架火炬安全距離計(jì)算模型。在實(shí)驗(yàn)研究射流火焰特性規(guī)律及對(duì)比分析常見(jiàn)安全距離計(jì)算方法基礎(chǔ)上，結(jié)合固體火焰模型與點(diǎn)源模型各自的優(yōu)點(diǎn)，，對(duì)現(xiàn)有常見(jiàn)的高架火炬安全距離計(jì)算模型進(jìn)行改進(jìn)，建立了基于分區(qū)域的多點(diǎn)源高架火炬安全距離計(jì)算模型，引入了最大風(fēng)玫瑰圖，根據(jù)安全輻射熱強(qiáng)度和不同方位的風(fēng)速來(lái)合理確定高架火炬的安全距離。 （3）研究CFD技術(shù)在高架火炬安全距離數(shù)值模擬方面的應(yīng)用。針對(duì)小尺寸實(shí)驗(yàn)，選用渦耗散概念（EDC）燃燒模型和帶浮力修正的CFD湍流模型對(duì)射流火焰進(jìn)行數(shù)值模擬，與實(shí)驗(yàn)進(jìn)行了對(duì)比，檢驗(yàn)該方法在射流火焰數(shù)值模擬方面的合理性。并利用該數(shù)值模擬方法對(duì)工程實(shí)際中的大尺寸高架火炬射流火焰進(jìn)行數(shù)值模擬，對(duì)數(shù)值結(jié)果進(jìn)行分析，為下文檢驗(yàn)改進(jìn)模型在工程中應(yīng)用的優(yōu)越性提供參考。 （4）工程應(yīng)用及有效性分析。以廣東省某石化企業(yè)高架火炬為例，根據(jù)建立的基于分區(qū)域的多點(diǎn)源高架火炬安全距離計(jì)算模型來(lái)計(jì)算該高架火炬的安全距離，同時(shí)將結(jié)果與數(shù)值模擬值、常見(jiàn)單點(diǎn)源模型計(jì)算值、常見(jiàn)多點(diǎn)源模型計(jì)算值對(duì)比分析，檢驗(yàn)及說(shuō)明了基于分區(qū)域的多點(diǎn)源高架火炬安全距離計(jì)算模型結(jié)果的合理性和優(yōu)越性。
[Abstract]:Elevated torch is one of the most commonly used safety and security facilities in petrochemical enterprises. The safety distance of the elevated torch is directly related to the construction investment and land resources of petrochemical enterprises. There is not a unified and accurate calculation method for the safety distance of the elevated torch at home and abroad. Therefore, how to scientifically and reasonably determine the minimum safety distance of the elevated torch under the premise of ensuring safety is studied. It is of great significance to improve the criterion of safety distance determination of elevated torch. Based on the experimental study of flame simulation of elevated torch jet and the comparison of common methods for determining the safety distance of elevated torch, a multi-point source model for calculating the safety distance of elevated torch based on sub-region is established in this paper. CFD technique is used to simulate the flame of elevated torch jet. The main contents are as follows: (1) study on flame characteristics of elevated torch jet. In this paper, the characteristics of jet flame in elevated torch are analyzed by setting up a small scale experimental platform, namely, flame geometry characteristics, flame temperature, flame thermal radiation distribution and so on, and the characteristics of jet flame in elevated torch are analyzed under different wind speed conditions, such as flame geometry, flame temperature, flame thermal radiation distribution and so on. The variation law of jet flame tilt angle is studied, which provides a basis for a new safe distance calculation model for elevated torch. It also provides a comparative reference for checking the rationality of the numerical simulation results. (2) the safety distance calculation model of multi-point source elevated torch based on sub-region is established. On the basis of the experimental study on the characteristics of jet flame and the comparison and analysis of common safe distance calculation methods, combined with the advantages of solid flame model and point source model, the existing common calculation model of safe distance of elevated torch is improved. The safety distance calculation model of multi-point source elevated torch based on sub-region is established, and the most gale rose map is introduced. According to the heat intensity of safety radiation and wind speed of different directions, the safe distance of elevated torch can be reasonably determined. (3) the application of CFD technology in numerical simulation of safety distance of elevated torch is studied. The numerical simulation of jet flame is carried out by using the vortex dissipation concept (EDC) combustion model and the CFD turbulence model with buoyancy correction. The numerical simulation results are compared with the experimental results, and the rationality of the method in the numerical simulation of jet flame is tested. The numerical simulation method is used to simulate the flame of large scale elevated torch jet in engineering practice, and the numerical results are analyzed. It provides a reference for testing the superiority of the improved model in engineering application below. (4) Engineering application and effectiveness analysis. Taking the elevated torch of a petrochemical enterprise in Guangdong province as an example, the safety distance of the elevated torch is calculated according to the established multi-point source overhead torch safety distance model based on sub-region, and the result and numerical simulation value are also given. The calculation values of common single point source model and common multi point source model are compared and analyzed. The rationality and superiority of the results of multi-point source elevated torch safety distance calculation model based on sub-area are verified and explained.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：X924.4;X937

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