CN105670655A - 煤分级炼制清洁燃料系统 - Google Patents

煤分级炼制清洁燃料系统 Download PDF

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CN105670655A
CN105670655A CN201610020417.3A CN201610020417A CN105670655A CN 105670655 A CN105670655 A CN 105670655A CN 201610020417 A CN201610020417 A CN 201610020417A CN 105670655 A CN105670655 A CN 105670655A
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车春玲
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Shandong Lianxing Energy Group Co Ltd
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    • C10B49/00Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
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    • C10G1/00Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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Abstract

本发明公开了煤分级炼制清洁燃料系统。它包括低温热解系统、压缩冷却机、变换及净化装置、深冷分离器、焦油预处理装置、焦油加氢装置和半焦混合器,低温热解系统分别与压缩冷却机、焦油预处理装置和半焦混合器相连,压缩冷却机、变换及净化装置、深冷分离器依次相连,焦油预处理装置与焦油加氢装置相连,深冷分离器与焦油加氢装置相连,焦油预处理装置、焦油加氢装置均与半焦混合器相连。本发明可以较好地利用碎煤资源,最终生产出石脑油、柴油、LNG、洁净煤等清洁燃料产品。

Description

煤分级炼制清洁燃料系统
技术领域
[0001]本发明涉及的是清洁燃料炼制技术领域,具体涉及煤分级炼制清洁燃料系统。
背景技术
[0002]随着大气污染防治工作的推进,我国对清洁的固体和液体燃料需求与日倶增,将丰富的煤炭转化为宝贵的油气资源,对改善能源结构、保障能源安全具有重要意义。目前,国内的煤制油、煤制天然气项目正处于大型商业化示范阶段,技术逐渐成熟,但这些过程投资高、能耗高、水耗高,煤热解可生成气体(煤气)、液体(焦油)和固体(半焦)3种形态产物,获得大量高附加值油气产品和高品质半焦产品,并且具有能耗低、水耗低等优点。目前,现有的煤热解系统主要重视对热解固体产物(半焦)加工利用,而忽视对气、液产物加工利用。
[0003]综上所述,需要设计一种新的煤分级炼制清洁燃料系统。
发明内容
[0004]针对现有技术上存在的不足,本发明目的是在于提供煤分级炼制清洁燃料系统,可以较好地利用碎煤资源,最终生产出石脑油、柴油、LNG、洁净煤等清洁燃料产品。
[0005]为了实现上述目的,本发明是通过如下的技术方案来实现:煤分级炼制清洁燃料系统,包括低温热解系统、压缩冷却机、变换及净化装置、深冷分离器、焦油预处理装置、焦油加氢装置和半焦混合器,低温热解系统分别与压缩冷却机、焦油预处理装置和半焦混合器相连,压缩冷却机、变换及净化装置、深冷分离器依次相连,焦油预处理装置与焦油加氢装置相连,深冷分离器与焦油加氢装置相连,焦油预处理装置、焦油加氢装置均与半焦混合器相连。
[0006]作为优选,所述的压缩冷却机为煤气压缩中间冷却器。
[0007]作为优选,所述的半焦混合器为清洁燃料成型装置。
[0008]所述的煤分级炼制清洁燃料系统的工艺流程为:碎煤(小于25mm)经干燥后,送入回转窑热解反应器,与750-850 °C半焦热载体混合并发生热解,生成半焦、焦油、热解气和水等产物,热解温度控制为550-600°C;焦油经预处理除去粉尘、水分等杂质后,送入加氢装置生产石脑油、柴油等清洁液体产品;半焦送入成型装置添加5%_10%的黏结剂成型后作为清洁的洁净煤产品;半焦成型过程同时配入5%_15%的含酚废水、含油废水、油泥等一起成型,废水中酚、油等物质可被半焦吸附,从而避免了废水、废固排放,也减少了水耗,煤气经压缩至3.5MPa后,送入变换装置,将其中的⑶转化为H2,控制CO体积分数小于I % ;然后进入净化装置,脱除其中的C0.服等,最后经深冷分离,得到LNG产品,H2用于焦油加氢装置。
[0009]本发明的有益效果:可以较好地利用碎煤资源,最终生产出石脑油、柴油、LNG、洁净煤等清洁燃料产品。
附图说明
[0010]下面结合附图和具体实施方式来详细说明本发明;
[0011]图1为本发明的系统图;
[0012]图2为本发明的工艺流程图。
具体实施方式
[0013]为使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施方式,进一步阐述本发明。
[0014]参照图1-2,本具体实施方式采用以下技术方案:煤分级炼制清洁燃料系统,包括低温热解系统1、压缩冷却机2、变换及净化装置3、深冷分离器4、焦油预处理装置5、焦油加氢装置6和半焦混合器7,低温热解系统I分别与压缩冷却机2、焦油预处理装置5和半焦混合器7相连,压缩冷却机2、变换及净化装置3、深冷分离器4依次相连,焦油预处理装置5与焦油加氢装置6相连,深冷分离器4与焦油加氢装置6相连,焦油预处理装置5、焦油加氢装置6均与半焦混合器7相连。
[0015]值得注意的是,所述的压缩冷却机2为煤气压缩中间冷却器。
[0016]值得注意的是,所述的半焦混合器7为清洁燃料成型装置。
[0017]此外,所述的煤分级炼制清洁燃料系统的工艺流程为:碎煤(小于25mm)经干燥后,送入回转窑热解反应器,与750-850 °C半焦热载体混合并发生热解,生成半焦、焦油、热解气和水等产物,热解温度控制为550-600°C;焦油经预处理除去粉尘、水分等杂质后,送入加氢装置生产石脑油、柴油等清洁液体产品;半焦送入成型装置添加5%_10%的黏结剂成型后作为清洁的洁净煤产品;半焦成型过程同时配入5%_15%的含酚废水、含油废水、油泥等一起成型,废水中酚、油等物质可被半焦吸附,从而避免了废水、废固排放,也减少了水耗,煤气经压缩至3.5MPa后,送入变换装置,将其中的⑶转化为H2,控制⑶体积分数小于I % ;然后进入净化装置,脱除其中的0)2和!125等,最后经深冷分离,得到LNG产品,出用于焦油加氢装置。
[0018]本具体实施方式系统主要废水包括煤低温热解产生的含酚废水以及焦油预处理及加氢产生的含油废水约51万t/a,可以全部用于半焦成型过程,废水中酚、油等物质可被半焦吸附,解决了废水处理难题,降低了鲜水耗约16%,变换工艺冷凝水约30万t/a,主要含有甲醇等杂质,经汽提后,可以全部用作锅炉给水,降低了新鲜水耗约10%,实现了工艺废水的近零排放。
[0019]以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (4)

1.煤分级炼制清洁燃料系统,其特征在于,包括低温热解系统(I)、压缩冷却机(2)、变换及净化装置(3)、深冷分离器(4)、焦油预处理装置(5)、焦油加氢装置(6)和半焦混合器(7),低温热解系统(I)分别与压缩冷却机(2)、焦油预处理装置(5)和半焦混合器(7)相连,压缩冷却机(2)、变换及净化装置(3)、深冷分离器(4)依次相连,焦油预处理装置(5)与焦油加氢装置(6)相连,深冷分离器(4)与焦油加氢装置(6)相连,焦油预处理装置(5)、焦油加氢装置(6)均与半焦混合器(7)相连。
2.根据权利要求1所述的煤分级炼制清洁燃料系统,其特征在于,所述的压缩冷却机(2)为煤气压缩中间冷却器。
3.根据权利要求1所述的煤分级炼制清洁燃料系统,其特征在于,所述的半焦混合器(7)为清洁燃料成型装置。
4.根据权利要求1所述的煤分级炼制清洁燃料系统,其特征在于,所述的煤分级炼制清洁燃料系统的工艺流程为:A、首先对碎煤进行干燥,然后送入回转窑热解反应器,与750-8500C半焦热载体混合并发生热解,生成半焦、焦油、热解气和水,热解温度为550-600°C ; B、焦油经预处理除去粉尘、水分杂质后,送入加氢装置制成石脑油、柴油清洁液体产品;C、半焦送入成型装置,并添加5%-10%的黏结剂,半焦成型过程同时配入5%-15%的含酚废水、含油废水、油泥一起成型,废水中酚、油物质被半焦吸附;D、煤气经压缩至3.5MPa后,送入变换装置,其中的CO转化为H2;然后进入净化装置,脱除其中的COdPH2S,最后经深冷分离,得到LNG,H2用于焦油加氢装置。
CN201610020417.3A 2016-01-13 2016-01-13 煤分级炼制清洁燃料系统 Pending CN105670655A (zh)

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US20150251971A1 (en) * 2013-11-19 2015-09-10 Uop Llc Process for selectively dealkylating aromatic compounds
CN103952197A (zh) * 2014-05-13 2014-07-30 西南化工研究设计院有限公司 一种利用发电系统中产生的热解气联产lng的工艺

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