Process for efficiently recovering reforming gas energy in hydrocarbon steam reforming hydrogen production process

A technology for reforming gas and steam, which is applied in the field of petrochemical industry. It can solve the problems of no pressure energy, large heat transfer temperature difference of waste heat boiler, and low energy efficiency of the second law, so as to increase the output energy of the device, reduce the energy consumption of the device, and increase the operation flexibility. Effect

Inactive Publication Date: 2017-04-19
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the heat energy of the reformed gas is recovered in the waste heat boiler, the pressure energy is not. At the same time, the heat transfer temperature difference of the waste heat boiler is large, and the temperature difference at the high temperature end is about 600°C (the saturation temperature of 3.5MPa steam is 243°C), indicating the heat recovery process The second law energy efficiency is very low, only 39%

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
  • Process for efficiently recovering reforming gas energy in hydrocarbon steam reforming hydrogen production process
  • Process for efficiently recovering reforming gas energy in hydrocarbon steam reforming hydrogen production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] This embodiment is a process for efficiently recovering reformed gas energy in the hydrogen production process of hydrocarbon steam reforming, and its process flow is as follows figure 2 shown. Specific steps are as follows:

[0031] The raw natural gas from the pipeline network enters the natural gas preheater 2 after being boosted by the natural gas compressor 1, is preheated by the 1.0MPa steam from the pipeline network, and then enters the flue gas of the reformer ~ the raw material preheater 3 and 4, and further heats up Then it enters hydrogenation reactor 5 and desulfurization reactor 6 to remove harmful elements such as sulfur and arsenic. Then it is injected with 3.5MPa saturated steam, enters the convection section of the reformer 8 with a suitable water-to-carbon ratio, and enters the pre-reforming reactor 7 and the furnace tube of the reformer 8 after heating up. Light hydrocarbons and water vapor undergo conversion reactions in the furnace tube to genera...

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 belongs to the technical field of petrochemical industry and discloses a process for efficiently recovering reforming gas energy in the hydrocarbon steam reforming hydrogen production process. According to the process, a reforming gas turbo expander is arranged between the outlet of a reforming furnace and the inlet of a waste heat boiler, so thate pressure energy and high-temperature heat energy of primary reforming gas are recovered to generate mechanical power or generate electricity or drive other power equipment (such as a raw natural gas compressor), the device output energy is increased and the device energy consumption is reduced under the condition of not influencing the yield and the purity of a hydrogen product, energy upgraded utilization is realized and significant economic benefit is achieved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a process for efficiently recovering reformed gas energy in the hydrogen production process of hydrocarbon steam reforming. Background technique [0002] Because it can help unsaturated hydrocarbons in saturated petroleum fractions, break chains of macromolecules into small molecules, and convert harmful elements such as sulfur, nitrogen, and oxygen into easy-to-separate H 2 S, NH 3 、H 2 O, etc. The application of hydrogen in the refining process is becoming more and more popular, such as hydrocracking, hydroupgrading, hydrofinishing, etc., which greatly increases the demand for hydrogen in refineries. [0003] At present, refineries usually use hydrocarbon steam reforming process to produce hydrogen. The basic process is that the refined raw material for hydrogen production (mostly natural gas and naphtha) enters the reformer. Under the action of hi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38
CPCC01B3/38C01B2203/0233Y02P20/129
Inventor 李国庆钟国添张丽芸
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap