Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for denitrifying refinery hydrogen stream

A hydrogen and denitrification technology, which is applied in the fields of hydrogen stream denitrification devices, hydrogen-rich stream denitrification devices, bypass denitrification devices and compressors, can solve problems such as poor economic benefits

Active Publication Date: 2017-05-31
ZHEJIANG UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, if denitrification equipment such as membrane separation is directly connected to the main pipeline of the hydrogen-rich stream, the economic benefits will not be obvious due to the low nitrogen concentration and high pressure drop.
[0005] Due to the existence of the above problems, the prior art has not reasonably dealt with the removal of nitrogen in refinery gas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for denitrifying refinery hydrogen stream
  • Method and device for denitrifying refinery hydrogen stream
  • Method and device for denitrifying refinery hydrogen stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: In the 1.5 million tons / year hydrocracking treatment unit, a set such as figure 1 The specific operation process and effect of the shown intermittent denitrification device are described as follows:

[0045] When the hydrogenation process starts, the circulating hydrogen from the hydrogenation reactor contains a multi-component mixture such as hydrogen sulfide and nitrogen, and its volume flow rate is 330000Nm 3 / h, the purity of hydrogen is 88%, and the density is 0.26kg / m 3 , the pressure is 17.4MPa. In the recycling process of hydrogen circulation, first enter the desulfurization tower from the inlet of the desulfurization tower with a built-in cyclone separator, and then fully contact with the desulfurizer (lean amine liquid) entering the upper inlet of the desulfurization tower to remove the entrainment in the hydrogen stream sulfide: after the desulfurization agent (lean amine liquid) reaches a certain level, it will exit the tower from the liquid ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the denitrification of refinery hydrogen streams, and provides a method and a device for denitrifying a refinery hydrogen stream. The method comprises the steps: not carrying out denitrifying treatment on the stream when the nitrogen content of the hydrogen stream is relatively low; feeding the nitrogen-containing hydrogen stream into the denitrifying device for denitrifying treatment when the nitrogen content of the hydrogen stream reaches a certain value, wherein the hydrogen stream requires to be fed to a compressor for pressurization after denitrification due to pressure drop caused during the denitrification. The nitrogen content is subjected to correlated measurement by using a monitoring device, and is used as a criterion for starting denitrifying operation. According to the method and the device, the hydrogen stream comprises a circulating hydrogen stream and a discharge stream of a hydrogen by-production device. The method can be used for optimizing equipment of the existing methods so as to increase the utilization ratio of byproduct hydrogen. The invention further provides the hydrogen stream denitrifying device.

Description

technical field [0001] The invention belongs to the field of chemical environmental protection treatment, and relates to a method and a device for denitrification of hydrogen-rich stream in a hydrogenation device. Specifically, the present invention adopts a bypass denitrification device and a compressor. When the nitrogen content in the hydrogen stream reaches a certain value, it is sent to the denitrification device for denitrification and then pressurized to avoid the nitrogen content in the hydrogen stream. The accumulation of nitrogen gas avoids possible adverse effects on the equipment caused by long-term operation, and at the same time, it can also utilize a part of the hydrogen in the waste gas, reducing the operating cost. The invention also relates to a hydrogen stream stream denitrification device. Background technique [0002] The hydrotreating process is an additional process commonly used in refining operations. These methods increase the value of low-value h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/22B01D53/047
CPCB01D53/047B01D53/22B01D2256/16B01D2257/102
Inventor 廖组维阳永荣王靖岱蒋斌波
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com