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微好氧預(yù)升溫序批式干發(fā)酵裝置設(shè)計與應(yīng)用
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河北省重點研發(fā)計劃項目(20323801D)和農(nóng)業(yè)農(nóng)村部農(nóng)業(yè)廢棄物能源化利用重點實驗室開放項目(KLERUAR2019-01)


Design and Application of Micro Aerobic Pre-heating Sequencing Batch Dry Fermentation Device
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    摘要:

    為解決微好氧同步預(yù)升溫序批式干發(fā)酵工藝實際運行過程中現(xiàn)有裝備存在曝氣不充分,、噴淋均勻度低等問題,,加快促進纖維物料降解和中間物質(zhì)轉(zhuǎn)化并提高產(chǎn)氣效率,創(chuàng)新設(shè)計裝備噴淋系統(tǒng)、曝氣系統(tǒng),,優(yōu)化集成了微好氧預(yù)升溫序批式厭氧干發(fā)酵一體化裝備,,實現(xiàn)微好氧快速預(yù)升溫、噴淋均勻接種,、高效生產(chǎn)沼氣,。通過噴頭特性比選出適合粘稠沼液循環(huán)的螺旋式噴嘴,并計算出當(dāng)噴淋面積為0.6m×0.6m時,,最佳噴頭間距和管道直徑分別為0.37m和0.08m,,噴淋覆蓋面積可達到物料表面積的87.33%。為方便物料進出,,設(shè)計曝氣管道對稱分布在物料兩側(cè),,共設(shè)置6支平行曝氣管,單側(cè)管道間距和兩端管道間距分別為0.5m和0.7m,。集成裝備并耦合微好氧同步預(yù)升溫序批式干發(fā)酵工藝,,通過長期試驗確定實際運行中的多組反應(yīng)器序批啟動調(diào)控策略應(yīng)為8組反應(yīng)器,啟動間隔為3d,,發(fā)酵周期為24d,。基于規(guī)?;膛pB(yǎng)殖場對技術(shù)裝備應(yīng)用經(jīng)濟效益進行核算,,得出投資回收周期約為4年,與傳統(tǒng)濕法厭氧發(fā)酵技術(shù)相比減少了約1.3年,。

    Abstract:

    Aiming to solve the problems of insufficient aeration and low spray uniformity in the existing equipment during the actual operation of the microaerobic synchronous preheating sequential batch dry fermentation process, accelerate the degradation of fiber materials and the conversion of intermediate substances and improve the efficiency of gas production, the equipment spray system and aeration system were innovatively designed, micro-aerobic pre-heating sequential batch anaerobic dry fermentation integrated equipment was optimized and integrated, realizing micro-aerobic rapid pre-heating, spray uniform inoculation, and efficient production of biogas. The spiral nozzles suitable for the circulation of viscous biogas slurry were selected through the comparison of nozzle characteristics, and it was calculated that when the spray area was 0.6m×0.6m, the best nozzle spacing and pipe diameter were 0.37m and 0.08m, respectively, and the spray coverage area can reach 87.33% of the surface area of the material. In order to facilitate the entry and exit of materials, the aeration pipes were designed to be symmetrically distributed on both sides of the materials, and a total of six parallel aeration pipes were set up. The distance between the pipes on one side and the pipes at both ends was 0.5m and 0.7m, respectively. The equipment was integrated and coupled with a micro-aerobic synchronous pre-heating sequential batch dry fermentation process. Through long-term experiments, it was determined that the sequential batch start-up control strategy of multiple reactors in actual operation should be eight reactors, the start interval was 3d, and the fermentation period was 24d. Based on the calculation of the economic benefits of technical equipment application in large-scale dairy farms, it was concluded that the investment recovery period was about 4 years, which was about 1.3 years less than the traditional wet anaerobic fermentation technology. This research can provide a theoretical basis for the efficient operation of the sequencing batch anaerobic dry fermentation technology in the actual application process.

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郭占斌,衣蕊,趙立欣,馮晶,葉炳南,于佳動.微好氧預(yù)升溫序批式干發(fā)酵裝置設(shè)計與應(yīng)用[J].農(nóng)業(yè)機械學(xué)報,2021,52(9):346-354. GUO Zhanbin, YI Rui, ZHAO Lixin, FENG Jing, YE Bingnan, YU Jiadong. Design and Application of Micro Aerobic Pre-heating Sequencing Batch Dry Fermentation Device[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(9):346-354.

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  • 收稿日期:2021-06-13
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  • 在線發(fā)布日期: 2021-09-10
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