CN110963875A - 一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法 - Google Patents

一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法 Download PDF

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CN110963875A
CN110963875A CN201811144803.9A CN201811144803A CN110963875A CN 110963875 A CN110963875 A CN 110963875A CN 201811144803 A CN201811144803 A CN 201811144803A CN 110963875 A CN110963875 A CN 110963875A
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tail gas
semi
calcium carbide
coke
carbide furnace
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李国明
杨晓丽
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Ningxia Baota Petrochemical Coal Chemical Industry Research Institute Co ltd
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Ningxia Baota Petrochemical Coal Chemical Industry Research Institute Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
    • C07C1/04—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon monoxide with hydrogen
    • C07C1/0425—Catalysts; their physical properties
    • C07C1/043—Catalysts; their physical properties characterised by the composition
    • C07C1/0435—Catalysts; their physical properties characterised by the composition containing a metal of group 8 or a compound thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
    • C07C1/04—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon monoxide with hydrogen
    • C07C1/0485—Set-up of reactors or accessories; Multi-step processes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
    • C07C2523/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper
    • C07C2523/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
    • C07C2523/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • C07C2523/889—Manganese, technetium or rhenium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
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Abstract

本发明的目的是公开一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，先分别将兰炭尾气和电石炉尾气净化，然后再将二者按比例混合，在反应器内，经催化剂的催化，通过一步反应即制得乙烯、丙烯等低碳烯烃，本发明充分利用了兰炭尾气中H2资源及电石炉尾气中的CO资源，所采用的多元复合型锆、锰、钴的铁基催化剂对乙烯、丙烯的选择性高，乙烯、丙烯产率高。

Description

一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法
技术领域
本发明涉及一种煤化工尾气利用方法，具有的涉及一种兰炭尾气和电石炉尾气的利用方法。
背景技术
兰炭尾气是以侏罗纪不粘煤和弱粘煤为原料，采用中低温干馏工艺生产的一种高固定碳含量的固体物质。每生产1t兰炭大约副产700NM3尾气，其主要成分H2（22~30%），CH4（8~10%），CO（15~18%）是重要的工业废气资源，利用兰炭尾气制氢气是兰炭尾气资源化利用的新途径。
电石炉尾气是电石生产过程中产生的尾气，生产1t电石产生尾气约400NM3，其主要成分为CO约占75~85%左右，目前，电石炉尾气主要利用途径是生产甲醇，合成氨等化工产品。
发明内容
本发明的目的是公开一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，充分利用兰炭尾气中H2资源及电石炉尾气中的CO资源，采用一步法直接制取乙烯、丙烯等低碳烯烃。
为了实现以上目的，本发明所采用的技术方案如下：
一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，包括以下步骤：
（1）从兰炭炉内出来的尾气经降温，除尘、除焦油、脱萘和脱硫及变换反应、变压吸附处理后，得到硫含量＜1ppm，CO＜1%，H2含量为55~60%的净化后兰炭尾气；
（2）从电石炉内出来的尾气经降温，经除尘、除焦油和脱硫处理后获得硫含量＜5ppm，CO含量为 78~82%的净化电石炉尾气；
（3）将净化后的兰炭尾气和电石炉尾气按照CO/H2摩尔比为1:1.2~1.5的比例混合，加热后送入反应器进行催化反应，反应催化剂为多元复合型锆、锰、钴的铁基催化剂，
所述反应器床层为5层。
所述反应温度300~330℃，反应压力为2.0~2.1MPa，空速为3000~3200h-1。
本发明所采用的多元复合型锆、锰、钴的铁基催化剂对乙烯、丙烯的选择性为70~75%，CO转化率为98~99%，每100kg催化剂可产乙烯、丙烯130~135kg，副产无硫清洁汽油20~25kg，甲烷7~8kg。
具体实施方式
（1）从兰炭炉内出来的尾气经空气冷却器降温、除尘器除尘、再经气液分离器除去焦油、然后经活性炭吸附塔和脱硫塔分别脱萘和脱硫，再经CO变换、变压吸附处理后，得到硫含量＜1ppm，CO＜1%，H2含量为55~60%的净化后兰炭尾气；
（2）从电石炉内出来的尾气净化过程为：电石炉尾气经空气冷却器降温至250~260℃，再经引风机引入除尘冷却器继续降温至40~50℃后，经罗茨风机升压然后进入CO气柜除尘。从气柜出来的电石炉尾气进入静电除焦器，除去尾气中夹带的煤焦油。然后经罗茨风机升压到250mmHg左右，进入降温塔，温度降到30~35℃。然后进入脱硫塔脱硫，脱硫采用氨水液相催化法，净化后电石炉尾气硫含量＜5 ppm，CO含量达到78~82%左右。
（3）将净化后的兰炭尾气和电石炉尾气按照CO/H2摩尔比为1:1.2~1.5的比例混合，加热后送入反应器进行催化反应，反应催化剂为多元复合型锆、锰、钴的铁基催化剂。反应器床层为5层。反应温度300~330℃，反应压力为2.0~2.1MPa，空速为3000~3200h-1。
经试验，该方法每100kg催化剂可产乙烯、丙烯130~135kg，副产无硫清洁汽油20~25kg，甲烷7~8kg。

Claims (3)

1.一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，包括以下步骤：
（1）从兰炭炉内出来的尾气经降温，除尘、除焦油、脱萘和脱硫及变换反应、变压吸附处理后，得到硫含量＜1ppm，CO＜1%，H2含量为55~60%的净化后兰炭尾气；
（2）从电石炉内出来的尾气经降温，经除尘、除焦油和脱硫处理后获得硫含量＜5ppm，CO含量为 78~82%的净化电石炉尾气；
（3）将净化后的兰炭尾气和电石炉尾气按照CO/H2摩尔比为1:1.2~1.5的比例混合，加热后送入反应器进行催化反应，反应催化剂为多元复合型锆、锰、钴的铁基催化剂。
2.如权利要求1所述的一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，其特征在于所述反应器床层为5层。
3.如权利要求1所述的一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法，其特征在于所述反应温度300~330℃，反应压力为2.0~2.1MPa，空速为3000~3200h-1。
CN201811144803.9A 2018-09-29 2018-09-29 一种利用兰炭尾气和电石炉尾气制备乙烯、丙烯的方法 Pending CN110963875A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102923655A (zh) * 2012-11-28 2013-02-13 西南化工研究设计院有限公司 一种兰炭尾气提取纯氢的方法
CN103483120A (zh) * 2013-08-23 2014-01-01 宁夏宝塔石化科技实业发展有限公司 一种利用焦炉气和电石炉尾气制备烯烃的方法
CN104549559A (zh) * 2013-10-28 2015-04-29 中国石油化工股份有限公司 流化床合成气直接制备低碳烯烃铁基催化剂的活化方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102923655A (zh) * 2012-11-28 2013-02-13 西南化工研究设计院有限公司 一种兰炭尾气提取纯氢的方法
CN103483120A (zh) * 2013-08-23 2014-01-01 宁夏宝塔石化科技实业发展有限公司 一种利用焦炉气和电石炉尾气制备烯烃的方法
CN104549559A (zh) * 2013-10-28 2015-04-29 中国石油化工股份有限公司 流化床合成气直接制备低碳烯烃铁基催化剂的活化方法

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