【摘要】：廠拌瀝青混合料再生設(shè)備是瀝青路面筑養(yǎng)護(hù)的主要設(shè)備之一,廣泛用于公路建設(shè)與養(yǎng)護(hù)中。隨著我國公路建設(shè)的快速發(fā)展,路面養(yǎng)護(hù)與舊料再生規(guī)模不斷擴(kuò)大,對廠拌瀝青混合料再生設(shè)備性能提出了更高的要求。骨料加熱系統(tǒng)是廠拌瀝青混合料再生設(shè)備的核心部分,其性能直接影響骨料加熱質(zhì)量、熱能利用以及廢氣顆粒的排放。因此研究骨料加熱系統(tǒng),開發(fā)出性能更優(yōu)、效率更高的廠拌瀝青混合料再生設(shè)備,對資源利用,節(jié)能和環(huán)保具有重要的現(xiàn)實(shí)意義。本文運(yùn)用理論分析與試驗(yàn)相結(jié)合方法,對煤轉(zhuǎn)氣型廠拌瀝青混合料再生設(shè)備骨料加熱系統(tǒng)進(jìn)行研究,主要研究工作如下。首先,分析了廠拌熱再生設(shè)備及其骨料加熱系統(tǒng)結(jié)構(gòu)與工作原理,對加熱系統(tǒng)匹配關(guān)系進(jìn)行了研究探討。通過煙氣特征分析,計(jì)算了煙氣中成分含量,為除塵系統(tǒng)的匹配研究提供了理論依據(jù);進(jìn)行了燃燒器燃燒溫度計(jì)算過程;計(jì)算了加熱系統(tǒng)煤氣化過程,確定了各成分含量。對加熱系統(tǒng)進(jìn)行了熱力學(xué)計(jì)算,得到干燥滾筒熱能流動與熱效率,給加熱系統(tǒng)熱效率分析提供了理論基礎(chǔ),并對骨料顆粒運(yùn)動進(jìn)行了分析。其次,對骨料加熱系統(tǒng)的主要參數(shù)進(jìn)行了設(shè)計(jì)與選擇;改進(jìn)設(shè)計(jì)了干燥滾筒主要結(jié)構(gòu)與參數(shù);通過滾筒的匹配試驗(yàn)研究,確定了干燥滾筒內(nèi)抄板的選型與布置,通過加熱系統(tǒng)的匹配關(guān)系,選擇了燃燒器與除塵設(shè)備,完成了加熱系統(tǒng)的設(shè)計(jì)。然后,進(jìn)行了改進(jìn)設(shè)計(jì)之后的煤轉(zhuǎn)氣型廠拌瀝青混合料再生設(shè)備骨料加熱系統(tǒng)與燃煤型、燃油型加熱系統(tǒng)對比試驗(yàn),證明了煤轉(zhuǎn)氣型再生設(shè)備骨料加熱系統(tǒng)設(shè)計(jì)與選擇合理,節(jié)能環(huán)保效果顯著;對骨料加熱系統(tǒng)改進(jìn)設(shè)計(jì)前后煤轉(zhuǎn)氣型廠拌瀝青混合料再生設(shè)備進(jìn)行了對比試驗(yàn),結(jié)果為改進(jìn)之后煤轉(zhuǎn)氣型骨料加熱系統(tǒng)燃料耗量明顯下降,表明煤轉(zhuǎn)氣型廠拌瀝青混合料再生設(shè)備骨料加熱系統(tǒng)的改進(jìn)設(shè)計(jì)是成功和有效的。最后,進(jìn)行了加熱系統(tǒng)再生性能試驗(yàn),通過出料溫度的實(shí)測數(shù)據(jù)與樣品的相關(guān)試驗(yàn),證明了該設(shè)備骨料加熱與再生性能良好,新舊料、再生料以及熱穩(wěn)定性都滿足各項(xiàng)性能指標(biāo);并對骨料加熱系統(tǒng)進(jìn)行了實(shí)際效率分析,給出了相應(yīng)的措施與建議。
[Abstract]:The recycling equipment of asphalt mixture is one of the main equipment of asphalt pavement construction and maintenance, which is widely used in highway construction and maintenance. With the rapid development of highway construction in our country, the scale of pavement maintenance and old material regeneration is expanding, which puts forward higher requirements for the performance of factory mix asphalt mixture recycling equipment. Aggregate heating system is the core part of asphalt mixture recycling equipment. Its performance directly affects the heating quality of aggregate, the utilization of heat energy and the emission of waste gas particles. Therefore, it is of great practical significance for resource utilization, energy saving and environmental protection to study aggregate heating system and develop better performance and higher efficiency of factory mix asphalt mixture recycling equipment. In this paper, the aggregate heating system of coal-to-gas asphalt mixture recycling equipment is studied by means of theoretical analysis and test. The main research work is as follows. Firstly, the structure and working principle of the plant mixing heat recycling equipment and its aggregate heating system are analyzed, and the matching relationship of the heating system is studied and discussed. Through the analysis of flue gas characteristics, the content of components in flue gas is calculated, which provides a theoretical basis for the matching study of dust removal system, the combustion temperature calculation process of burners is carried out, and the coal gasification process of heating system is calculated, and the contents of each component are determined. The thermodynamic calculation of the heating system is carried out, and the thermal energy flow and thermal efficiency of the drying drum are obtained, which provides a theoretical basis for the thermal efficiency analysis of the heating system, and the movement of aggregate particles is analyzed. Secondly, the main parameters of the aggregate heating system are designed and selected, and the main structure and parameters of the drying drum are improved. Through the matching test of the drum, the selection and arrangement of the plate in the drying drum are determined. Through the matching relationship of the heating system, the burners and dust removal equipment are selected, and the design of the heating system is completed. Then, the comparative test of aggregate heating system, coal fuel type and oil type heating system of coal to gas type asphalt mixture recycling equipment after the improved design is carried out, and it is proved that the design and selection of aggregate heating system of coal to gas type recycling equipment are reasonable. The effect of energy saving and environmental protection is remarkable. A comparative test was carried out on the recycling equipment of coal-to-gas mix asphalt mixture before and after the improved design of the aggregate heating system. The results showed that the fuel consumption of the coal-to-gas aggregate heating system decreased obviously after the improvement. The results show that the improved design of aggregate heating system for coal-to-gas mixture recycling equipment is successful and effective. Finally, the regeneration performance test of the heating system is carried out. through the measured data of the discharge temperature and the related tests of the samples, it is proved that the aggregate heating and recycling performance of the equipment is good, and the new and old materials are good. The recycled material and thermal stability meet all the performance indexes. The actual efficiency of aggregate heating system is analyzed, and the corresponding measures and suggestions are given.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U414

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