CN107848795A - 利用现有蒸汽/天然气重整器的增量产氢 - Google Patents

利用现有蒸汽/天然气重整器的增量产氢 Download PDF

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CN107848795A
CN107848795A CN201680041627.9A CN201680041627A CN107848795A CN 107848795 A CN107848795 A CN 107848795A CN 201680041627 A CN201680041627 A CN 201680041627A CN 107848795 A CN107848795 A CN 107848795A
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Abstract

在一些方面，用于增量产氢的方法包括在第一变压吸收(PSA)系统中将现有重整器合成气产物流分离为第一氢气流和第一废气流。将第一废气流压缩到至少40巴，以产生经过压缩的废气流。除去经过压缩的废气流中的水，以产生干燥的废气流。从干燥的废气流中除去二氧化碳，以产生剩余的废气流，其中除去的二氧化碳是现有重整器合成气体产物流中二氧化碳的至少85％。利用第二PSA系统将剩余的废气流分离为第二氢气流和第二废气流，其中所述第二氢气流包含至少11％的来自现有重整器合成气产物流的氢气。将第二废气流作为燃料气体导入重整器炉中。

Description

利用现有蒸汽/天然气重整器的增量产氢
要求优先权
本申请要求2015年5月15日提交的美国临时申请第62/162,229号的优先权，其完整内容通过参考结合于此。
技术领域
本发明涉及气-液生产，更具体涉及利用现有蒸汽/天然气重整器的增量产氢。
背景
用于将烃气体(例如天然气)转化为可用烃液体燃料和原料的整合设备包括H2+CO合成气生成系统，该系统为具有相关电力和热能系统的费-托(Fischer-Tropsch)催化烃合成系统提供原料气体。
高效率、低基建成本以及低碳足迹是整个设施的主要目标。美国专利6534551和6669744描述了一种整合合成气生成系统，该系统包括与燃气轮机整合在一起的两级合成气生成单元，所述燃气轮机为O2生产设备提供至少一部分的所需的能量。O2设备可以是低温空气分离单元，与燃气轮机整合的高温混合氧化物O2离子转移膜反应器，或其它单元。两级合成气发生器包括以并联或串联设置与气体加热催化蒸汽/烃重整器(GHR)连接的部分氧化(POX)或自动热重整器(ATR)，在该气体加热催化蒸汽/烃重整器(GHR)中，加热气体是来自各合成气生成反应器的混合产物。来自燃气轮机的热废气提供用于对导向合成气生成反应器的进料物流进行预热的至少一部分的热量。
附图说明
图1是增量产氢的示例性系统。
不同附图中的相同附图标记表示相同的元件。
发明详述
图1显示用于增量产氢的示例性系统。例如，用于由现有的催化蒸汽/天然气重整器增量产氢的方法可使用低温CO2冷凝过程来分离现有重整器变压吸收(PSA)氢分离单元的废气中存在的CO2，使得剩余的富含氢的废气随后可被输送到第二PSA单元，在此能够分离更多的H2。废气流16可首先在压缩器17中被压缩到约1.2巴到40巴，然后经过压缩的废气流4在例如吸附床干燥器12中干燥，该吸附床干燥器12通过氮气流5和6再生。如图所示，经过压缩的废气流7进入CO2冷凝系统3，在此该废气流冷却到例如其三相点温度的±2℃范围内。液体CO2分离并蒸发，以对工艺过程制冷，CO2产物在约10巴的平均压力下作为两股独立的物流10和11离开。剩余的压缩废气流8包含约65％的H2，在PSA 2中分离，产生35巴压力下的基本纯的H2流9和废气流14，该废气流14用作现有重整器炉中燃料气的一部分。在一些实施方式中，所述的系统可从现有的重整器合成气体产物流1产生增量11％的更多的H2。增量H2生产可使用额外的天然气来代替已经在重整器炉中燃烧的H2。在一些实施中，用于增量H2生产的燃料消耗为280Btu/scf H2。在这些情况中，物流10加11中生产的CO2可以是重整器产物流1中存在的CO2的约85％。
描述了本发明的许多实施方式。然而，应理解，可进行各种改进而不背离本发明的精神和范围。因此，其它实施方式包括在所附权利要求书的范围内。

Claims (2)

1.一种增量产氢的方法，所述方法包括：
在第一变压吸收(PSA)系统中将现有重整器合成气产物流分离为第一氢气流和第一废气流；
将第一废气流压缩到至少40巴，以产生经过压缩的废气流；
除去经过压缩的废气流中的水，以产生干燥的废气流；
从干燥的废气流中除去二氧化碳，以产生剩余的废气流，其中除去的二氧化碳是现有重整器合成气体产物流中二氧化碳的至少85％；
在第二PSA系统中将剩余的废气流分离为第二氢气流和第二废气流，其中所述第二氢气流包含至少11％的来自现有重整器合成气产物流的氢气；和
将第二废气流作为燃料气体导入重整器炉中。
2.一种增量产氢的系统，所述系统包括：
第一变压吸收(PSA)系统，该系统配置成将现有重整器合成气产物流分离为第一氢气流和第一废气流；
压缩器，该压缩器配置为将第一废气流压缩到至少40巴，以产生经过压缩的废气流；
干燥器，该干燥器配置为除去经过压缩的废气流中的水，以产生干燥的废气流；
低温分离器，该低温分离器配置为从干燥的废气流中除去二氧化碳，以产生剩余的废气流，其中除去的二氧化碳是现有重整器合成气体产物流中二氧化碳的至少85％；
第二PSA系统，该系统配置为将剩余的废气流分离为第二氢气流和第二废气流，其中所述第二氢气流包含至少11％的来自现有重整器合成气产物流的氢气；和
导管，该导管配置为将第二废气流作为燃料气体导入重整器炉中。
CN201680041627.9A 2015-05-15 2016-05-16 利用现有蒸汽/天然气重整器的增量产氢 Active CN107848795B (zh)

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CN110790229B (zh) * 2019-10-28 2023-08-01 中科液态阳光(苏州)氢能科技发展有限公司 甲醇水超高压制氢系统及其制氢方法
CN110817794B (zh) * 2019-10-28 2023-08-01 中科液态阳光(苏州)氢能科技发展有限公司 氢分离与水煤气重整一体式超高压制氢系统及其方法

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