新型復(fù)合轉(zhuǎn)子超重力旋轉(zhuǎn)床性能的研究
發(fā)布時(shí)間：2018-08-13 13:33
【摘要】：超重力旋轉(zhuǎn)床,是一種新型高效的過(guò)程強(qiáng)化裝置,它能產(chǎn)生數(shù)百至一千倍重力加速度的超重力環(huán)境,極大的提高了氣液比表面積和氣液間的傳質(zhì)。成功的應(yīng)用于工業(yè)吸收、萃取、精餾等分離過(guò)程當(dāng)中。超重力旋轉(zhuǎn)床的核心的部件是轉(zhuǎn)子,本文設(shè)計(jì)了一種新型復(fù)合轉(zhuǎn)子,其特征在于,復(fù)合轉(zhuǎn)子分為內(nèi)側(cè)部分和外側(cè)兩部分,內(nèi)側(cè)部分是隨動(dòng)盤(pán)轉(zhuǎn)動(dòng)的多層多孔波紋碟片與靜止的靜盤(pán)結(jié)合,每2層波紋碟片之間相互嵌套,構(gòu)成“S”型氣液流通通道。復(fù)合轉(zhuǎn)子外側(cè)部分為折流式旋轉(zhuǎn)床轉(zhuǎn)子。用NaOH水溶液化學(xué)吸收CO2與空氣的混合氣體來(lái)測(cè)定新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣液比表面積ae和液相分傳質(zhì)系數(shù)kL,并用空氣吹脫乙醇水溶液的方法來(lái)測(cè)定新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣相分傳質(zhì)系數(shù)kG,還以空氣-水為體系測(cè)量了新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣相壓降�？疾榱藲饬俊⒁毫亢娃D(zhuǎn)速對(duì)新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床性能的影響,并將實(shí)驗(yàn)數(shù)據(jù)與折流式旋轉(zhuǎn)床實(shí)驗(yàn)數(shù)據(jù)相進(jìn)行對(duì)比。實(shí)驗(yàn)結(jié)果表明:(1)新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣液比表面積ae、液相分傳質(zhì)系數(shù)kL和氣相分傳質(zhì)系數(shù)kG隨氣量、液量和轉(zhuǎn)速的增大而增大。ae、kL和kG分別達(dá)到292m2/m3~880.5m2/m3、0.0014m/s~0.00264m/s和0.016m/s~0.062m/s。(2)在相同的設(shè)備參數(shù)和操作條件下,新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床與折流式旋轉(zhuǎn)床相比較,氣液比表面積ae大0.47~2.46倍、液相分傳質(zhì)系數(shù)kL小11%~37%和氣相分傳質(zhì)系數(shù)kG小7%~22%。(3)在相同的設(shè)備參數(shù)和操作條件下,新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床與其它旋轉(zhuǎn)床(RPB)相比,新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣液比表面積ae大于分段進(jìn)液式RPB、多個(gè)葉片轉(zhuǎn)子RPB和板式填料RPB,小于常規(guī)不銹鋼金屬網(wǎng)RPB、鎳泡沫填料RPB。新型復(fù)合轉(zhuǎn)子的液相分傳質(zhì)系數(shù)kL高于其它旋轉(zhuǎn)床。小液量時(shí),復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的氣相分傳質(zhì)系數(shù)kG與其它旋轉(zhuǎn)床很接近。(4)新型復(fù)合轉(zhuǎn)子旋轉(zhuǎn)床的干床壓降和濕床壓降隨氣量增大而增大,干床壓降隨轉(zhuǎn)速增大緩慢增大。濕床壓降隨轉(zhuǎn)速和液量的增加而增大。與折流式旋轉(zhuǎn)床相比,干床壓降小30%~42%。濕床氣相壓降小52%~70%。
[Abstract]:High gravity rotating bed is a new type of high efficiency process strengthening device. It can produce hundreds to one thousand times of gravity acceleration in the high gravity environment and greatly improve the gas-liquid specific surface area and mass transfer between gas and liquid. Successful application in industrial absorption, extraction, distillation and other separation processes. The core component of the high gravity rotating bed is the rotor. In this paper, a new type of composite rotor is designed, which is characterized by the fact that the composite rotor is divided into two parts: the inner part and the outer part. In the inner part, the multi-layer porous corrugated disc rotates with the stationary disc, and each of the two layers of corrugated disc is nested with each other to form a "S" type gas-liquid flow channel. The outer part of the composite rotor is a rotor with a baffled rotating bed. The gas-liquid specific surface area (ae) and liquid mass transfer coefficient (KL) of a new compound rotor rotating bed were determined by chemical absorption of CO2 and air mixture gas by NaOH aqueous solution, and the new composite rotor was determined by air blowing off ethanol aqueous solution. The gas phase mass transfer coefficient (KG) of the rotating bed is also measured by using the air-water system to measure the gas phase pressure drop of the new composite rotor rotating bed. The effects of gas volume, liquid volume and rotating speed on the performance of the new compound rotor rotating bed were investigated, and the experimental data were compared with the experimental data of the baffled rotating bed. The experimental results show that: (1) the gas-liquid specific surface area, liquid mass transfer coefficient KL and gas phase mass transfer coefficient KG of the new composite rotor rotating bed depend on the volume of gas. With the increase of liquid volume and rotational speed, the ratio of gas to liquid is increased to 292m2m2m3880.5m2rm3kL and 0.0014m / s 0.00264m / s and 0.016m / s / s 0.062m / s respectively. (2) under the same equipment parameters and operating conditions, the gas-liquid specific surface area of the new rotating bed is 0.47% 2.46 times larger than that of the zigzag rotating bed. The liquid phase mass transfer coefficient KL is 11 / 37% and the gas phase mass transfer coefficient KG is 7 / 22. (3) under the same equipment parameters and operating conditions, the new composite rotor rotating bed is compared with other rotating bed (RPB). The gas-liquid specific surface area of the new composite rotor rotating bed is larger than that of the segmented liquid injection type RPB. the RPB of multiple blade rotors and the plate packing RPBare smaller than those of conventional stainless steel metal mesh and nickel foam filler RPB. The liquid phase mass transfer coefficient KL of the new composite rotor is higher than that of other rotating beds. The gas mass transfer coefficient KG of the rotating bed is very close to that of other rotating beds. (4) the dry bed pressure drop and the wet bed pressure drop increase with the increase of air volume, and the dry bed pressure drop increases slowly with the increase of rotating speed. The wet bed pressure drop increases with the increase of rotational speed and liquid content. The dry bed pressure drop is 30 / 42 lower than the baffled rotating bed. The wet bed vapor pressure drop is 52%.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TQ051.1
[Abstract]:High gravity rotating bed is a new type of high efficiency process strengthening device. It can produce hundreds to one thousand times of gravity acceleration in the high gravity environment and greatly improve the gas-liquid specific surface area and mass transfer between gas and liquid. Successful application in industrial absorption, extraction, distillation and other separation processes. The core component of the high gravity rotating bed is the rotor. In this paper, a new type of composite rotor is designed, which is characterized by the fact that the composite rotor is divided into two parts: the inner part and the outer part. In the inner part, the multi-layer porous corrugated disc rotates with the stationary disc, and each of the two layers of corrugated disc is nested with each other to form a "S" type gas-liquid flow channel. The outer part of the composite rotor is a rotor with a baffled rotating bed. The gas-liquid specific surface area (ae) and liquid mass transfer coefficient (KL) of a new compound rotor rotating bed were determined by chemical absorption of CO2 and air mixture gas by NaOH aqueous solution, and the new composite rotor was determined by air blowing off ethanol aqueous solution. The gas phase mass transfer coefficient (KG) of the rotating bed is also measured by using the air-water system to measure the gas phase pressure drop of the new composite rotor rotating bed. The effects of gas volume, liquid volume and rotating speed on the performance of the new compound rotor rotating bed were investigated, and the experimental data were compared with the experimental data of the baffled rotating bed. The experimental results show that: (1) the gas-liquid specific surface area, liquid mass transfer coefficient KL and gas phase mass transfer coefficient KG of the new composite rotor rotating bed depend on the volume of gas. With the increase of liquid volume and rotational speed, the ratio of gas to liquid is increased to 292m2m2m3880.5m2rm3kL and 0.0014m / s 0.00264m / s and 0.016m / s / s 0.062m / s respectively. (2) under the same equipment parameters and operating conditions, the gas-liquid specific surface area of the new rotating bed is 0.47% 2.46 times larger than that of the zigzag rotating bed. The liquid phase mass transfer coefficient KL is 11 / 37% and the gas phase mass transfer coefficient KG is 7 / 22. (3) under the same equipment parameters and operating conditions, the new composite rotor rotating bed is compared with other rotating bed (RPB). The gas-liquid specific surface area of the new composite rotor rotating bed is larger than that of the segmented liquid injection type RPB. the RPB of multiple blade rotors and the plate packing RPBare smaller than those of conventional stainless steel metal mesh and nickel foam filler RPB. The liquid phase mass transfer coefficient KL of the new composite rotor is higher than that of other rotating beds. The gas mass transfer coefficient KG of the rotating bed is very close to that of other rotating beds. (4) the dry bed pressure drop and the wet bed pressure drop increase with the increase of air volume, and the dry bed pressure drop increases slowly with the increase of rotating speed. The wet bed pressure drop increases with the increase of rotational speed and liquid content. The dry bed pressure drop is 30 / 42 lower than the baffled rotating bed. The wet bed vapor pressure drop is 52%.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TQ051.1
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