關(guān)于粉煤氣化配套制氨組合變換工藝設(shè)計(jì)思路的研究

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摘 要：針對粉煤氣化高一氧化碳制合成氨變換裝置，設(shè)計(jì)采用一級等溫變換爐控制變換溫度，二級絕熱變換爐來副產(chǎn)過熱蒸汽，三級等溫變換爐盡可能降低溫度，達(dá)到深度變換的要求。該工藝不僅使高濃度的一氧化碳變換反應(yīng)在較溫和的工藝條件下進(jìn)行，而且能副產(chǎn)高品質(zhì)中壓過熱蒸汽。

關(guān)鍵詞：粉煤氣化；CO變換；等溫工藝；過熱蒸汽

doi：10.3969/j.issn.1004-8901.2024.06.014

中圖分類號：TQ545

文獻(xiàn)標(biāo)識碼：B

文章編號：1004-8901（2024）06-0050-03

Research on the Design of Combined CO Shift Process for Ammonia Production in Pulverized Coal Gasification

SHI Yu， DAI Feng-yu， ZHENG Zhi-zhong

（Hunan Anchun High-tech Co.， Ltd.， Changsha Hunan 410205， China）

Abstract：

Aiming at the CO shift unit of high concentration carbon monoxide to synthetic ammonia in pulverized coal gasification， a first-stage isothermal converter is designed to control the conversion temperature， a second-stage adiabatic converter to by-produce superheated steam， and a third-stage isothermal converter to reduce the temperature as much as possible to meet the requirement of deep conversion. The process not only makes the high concentration CO shift reaction occur under mild process conditions， but also can by-produce high quality superheated steam.

Keywords：

pulverized coal gasification; CO shift; isothermal process; superheated steam

doi：10.3969/j.issn.1004-8901.2024.06.014

粉煤加壓氣化技術(shù)配套制合成氨的變換工藝主要有多段絕熱變換工藝和兩段等溫變換工藝，耐硫變換催化劑使用溫度一般要求≤450 ℃，采用多段絕熱變換工藝，一級變換爐由于反應(yīng)推動力太大，熱點(diǎn)溫度難以控制，容易超溫，有不少工廠實(shí)際運(yùn)行溫度達(dá)到470～480 ℃，設(shè)備存在風(fēng)險(xiǎn)的同時(shí)，也嚴(yán)重影響催化劑使用壽命。（剩余2383字）