本文選題：除塵裝置 + 塵源控制��； 參考：《東華大學(xué)》2013年碩士論文

【摘要】：本課題以某企業(yè)大型礦用車卸礦料槽處卸礦過程的揚塵問題作為研究對象,主要研究了礦車在料槽處卸礦過程所形成的揚塵及其特點,以及針對此揚塵所采用的塵源控制方案及除塵裝置。 在礦車卸礦過程中,礦石自礦車卸入料槽的下落過程及礦石在料槽內(nèi)的堆積過程均會形成誘導(dǎo)氣流,使夾雜在礦石之中的細小粉塵隨著誘導(dǎo)氣流而溢出料槽,形成揚塵；另外,在現(xiàn)場沒有防護的情形下,揚塵在自然風(fēng)、熱氣流等二次塵化作用的影響下會造成更大范圍的擴散,不但會影響到現(xiàn)場的工藝操作,而且也會污染周圍的環(huán)境。 針對礦車料槽處卸礦過程形成的揚塵：分別采用理論計算和數(shù)值模擬的方法對揚塵風(fēng)量進行了確定；另外,采用數(shù)值模擬的方法對卸礦過程形成的揚塵氣流進行了分析,為后續(xù)塵源控制方案的提出奠定了基礎(chǔ)。 針對礦車卸礦過程形成的揚塵氣流隨礦車卸料點的不同而變化的特點,提出了適應(yīng)于揚塵氣流變化的塵源控制方案；根據(jù)料槽處的生產(chǎn)工藝和具體環(huán)境分別擬定了側(cè)吸式塵源控制方案和吹吸塵源控制方案。 針對側(cè)吸式塵源控制方案和吹吸式塵源控制方案,采用了數(shù)值模擬的方法對影響塵源捕集效率的主要因素進行了正交試驗研究,得到了兩種塵源控制方案的捕集效率與其主要影響因素之間的函數(shù)關(guān)系式。通過對比分析發(fā)現(xiàn)：在實現(xiàn)對塵源完全控制的情形下,側(cè)吸式塵源控制方案所需的通風(fēng)量小,且其系統(tǒng)結(jié)構(gòu)簡單；具有初投資小、運行管理方便等的特點,故本課題選用側(cè)吸式塵源控制方案為較佳的塵源控制方案。 依據(jù)流量比法和π定理,對影響側(cè)吸式塵源控制方案塵源捕集效率的各主要因素進行無量綱分析,結(jié)合正交模擬試驗結(jié)果得到了極限流量比KL的多元回歸關(guān)聯(lián)式；基于多元回歸關(guān)聯(lián)式對側(cè)吸式塵源控制方案進行了優(yōu)化。 結(jié)合優(yōu)化后的側(cè)吸式揚塵控制方案,設(shè)計出新型移動式除塵裝置用于礦車料槽處卸礦過程的塵源控制；為今后工程設(shè)計提供了參考。
[Abstract]:In this paper, the dust in the unloading process of a large truck in an enterprise is taken as the research object, and the dust and its characteristics in the unloading process are mainly studied. As well as the dust source control scheme and dust removal device. In the process of ore unloading, both the falling process of ore from the unloading tank and the accumulation process of ore in the ore tank will form induced airflow, which will cause the fine dust mixed in the ore to overflow with the induced air flow, forming dust; in addition, Under the influence of natural wind, hot air flow and other secondary dusts, it will cause a wider diffusion, which will not only affect the field operation, but also pollute the surrounding environment. Aiming at the hoisting dust formed by unloading process at the ore tank, the dust volume is determined by the method of theoretical calculation and numerical simulation, in addition, the dust flow formed in the unloading process is analyzed by the numerical simulation method. It lays a foundation for the following scheme of dust source control. In view of the characteristics that the dust flow formed in the unloading process changes with the different unloading points of the truck, the dust source control scheme adapted to the variation of the dust flow is put forward. According to the production process and specific environment of the feed tank, the control scheme of side suction dust source and the control scheme of blowing dust source are worked out respectively. Aiming at the control scheme of side-suction dust source and the control scheme of blowing dust source, the main factors affecting the collecting efficiency of dust source were studied by orthogonal test using numerical simulation method. The functional relationship between the capture efficiency of two kinds of dust source control schemes and its main influencing factors is obtained. Through comparison and analysis, it is found that under the condition of complete control of dust source, the ventilation of side suction dust source control scheme is small, and its system structure is simple, with the characteristics of small initial investment, convenient operation and management, etc. Therefore, the control scheme of side-suction dust source is better. Based on the flow ratio method and 蟺 theorem, the dimensionless analysis of the main factors affecting the efficiency of dust collection in the control scheme of side suction dust source is carried out, and the multivariate regression correlation of the limit flow ratio KL is obtained by combining with the results of orthogonal simulation test. The control scheme of side-suction dust source is optimized based on multi-regression correlation. Combined with the optimized side suction dust control scheme, a new type of mobile dust removal device is designed for the dust source control of the unloading process at the mine car tank, which provides a reference for the future engineering design.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD714.4

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