考慮新氫純度的氫網(wǎng)絡(luò)夾點(diǎn)分析
本文關(guān)鍵詞: 氫網(wǎng)絡(luò) 新氫摩爾分?jǐn)?shù) 制氫模擬 優(yōu)化 出處:《化工進(jìn)展》2017年03期 論文類(lèi)型:期刊論文
【摘要】:基于夾點(diǎn)法,對(duì)考慮新氫純度的氫網(wǎng)絡(luò)集成進(jìn)行了研究。利用Aspen Plus建立了天然氣蒸氣轉(zhuǎn)化制氫過(guò)程的模擬模型。在考慮原料氣、除氧水、冷卻水、副產(chǎn)蒸氣、變壓吸附、壓縮機(jī)用電等主要能耗的前提下,計(jì)算出系統(tǒng)總費(fèi)用,對(duì)整個(gè)過(guò)程進(jìn)行了能耗分析。通過(guò)改變產(chǎn)氫摩爾分?jǐn)?shù),得到相應(yīng)的單位產(chǎn)氫量費(fèi)用,進(jìn)一步擬合出了新氫生產(chǎn)成本隨產(chǎn)氫摩爾分?jǐn)?shù)變化的定量關(guān)系式。在此基礎(chǔ)上,對(duì)某煉廠的氫網(wǎng)絡(luò)案例進(jìn)行優(yōu)化,作出不同氫源線下的節(jié)氫費(fèi)用-新氫摩爾分?jǐn)?shù)關(guān)系圖、新氫消耗費(fèi)用-新氫摩爾分?jǐn)?shù)圖。通過(guò)分析夾點(diǎn)位置隨新氫摩爾分?jǐn)?shù)改變的變化趨勢(shì)可知,在滿(mǎn)足氫網(wǎng)絡(luò)要求下,節(jié)省費(fèi)用隨新氫摩爾分?jǐn)?shù)的增大而增大,新氫消耗費(fèi)用隨摩爾分?jǐn)?shù)的增大而減少。因此,在該氫網(wǎng)絡(luò)中,高純度的新氫有利于系統(tǒng)節(jié)能。
[Abstract]:Based on the pinch point method, the hydrogen network integration considering the purity of new hydrogen was studied. The simulation model of hydrogen production process was established by Aspen Plus. Considering raw gas, deoxygenation water, cooling water, by-product vapor, pressure swing adsorption, Under the premise of main energy consumption such as electricity consumption of compressor, the total cost of the system is calculated, and the energy consumption of the whole process is analyzed. By changing the mole fraction of hydrogen production, the corresponding unit hydrogen production cost is obtained. The quantitative relationship between the production cost of new hydrogen and the molar fraction of hydrogen production is further fitted. On the basis of this, the hydrogen network case of a refinery is optimized, and the relationship diagram of hydrogen saving cost and new hydrogen mole fraction under different hydrogen source lines is obtained. By analyzing the change trend of the pinch position with the new hydrogen molar fraction, we can see that the saving cost increases with the increase of the new hydrogen mole fraction under the requirement of the hydrogen network. The cost of new hydrogen consumption decreases with the increase of molar fraction. Therefore, in this hydrogen network, high purity of new hydrogen is beneficial to the energy saving of the system.
【作者單位】: 西安交通大學(xué)化學(xué)工程與技術(shù)學(xué)院;
【基金】:國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(21476180)
【分類(lèi)號(hào)】:TQ116.2
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