Method and system for recycling ethylene in tail gas through barren liquor effect in demethanization process

A technology of lean liquid effect and demethanization stripping tower, which is applied in the field of ethylene recovery in tail gas, can solve the problems of limited promotion, high investment, and insignificant energy saving effect, and achieve the effect of low investment, low energy consumption and excellent effect

Active Publication Date: 2013-12-18
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The first way is limited to the engineering market because of the high investment; the second way is the same as the first way, and it also saves energy because of the increase

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 system for recycling ethylene in tail gas through barren liquor effect in demethanization process
  • Method and system for recycling ethylene in tail gas through barren liquor effect in demethanization process
  • Method and system for recycling ethylene in tail gas through barren liquor effect in demethanization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The following are examples and process parameters thereof, but the content of the present invention is not limited to the scope of these examples.

[0040] Such as figure 1 As shown, the primary deep subcooling scheme of the absorbent of the present invention includes a demethanizer stripping tower 01, a demethanizer rectifying tower 02, and a carbon dioxide absorbing tower 03 (with trays or fillers equivalent to about 6 to 7 plates inside). ), first demethanizer feed separation tank 04, second demethanizer feed separation tank 05, third demethanizer feed separation tank 06, demethanizer reflux tank 07, demethanizer stripper reboiler 08. No. 1 demethanizer feed heat exchanger 09, No. 2 demethanizer feed heat exchanger 10, No. 3 demethanizer feed heat exchanger 11, No. 4 demethanizer feed heat exchanger 12, Demethanizer stripping tower overhead cooler 13, demethanizer rectifying tower condenser 14, methane hydrogen heat exchanger (outside the system) 15, demethanizer st...

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 a method and system for recycling ethylene in tail gas through barren liquor effect in the demethanization process. The method comprises the following steps of: separating nine tenths of hydrogen and a part of methane from feedstock by matching an absorption tower with all levels of separating equipment of chilling series at the front end, and then leading another part of methane and nine tenths of C<2+> to enter a fractionation tower for fractionation. In the processes, ethylene possibly lost in the tail gas can be more thoroughly recovered by using the characteristic that the C<2+> is superiorly dissolved by an absorbent of the absorption tower. The absorbent of the absorption tower is barren liquor coming from the interior of the system, namely a part of reflux of the fractionation tower, thus showing the barren liquor effect. compared with the prior art that levels of the chilling series at the front end are changed into the fractionation subsystems with multiple theoretical plates, the method and the system are more excellent in effect on controlling the loss of ethylene in the tail gas, lower in energy consumption, and lower in investment.

Description

technical field [0001] The invention relates to a light hydrocarbon separation method and a separation system, in particular to a method and a system for recovering ethylene in tail gas in a demethanization process by utilizing the lean liquid effect. Background technique [0002] Separation of light hydrocarbons refers to hydrogen and C1 to C5 hydrocarbon mixtures (abbreviation: H 2 -C 1 -C 5 ) for separation. [0003] The mixture of hydrogen and methane is abbreviated as C 1 - , carbon one and heavier fractions are abbreviated as C 1 + , the carbon distillate is abbreviated as C 2 , the separation of hydrogen and methane is abbreviated as H 2 / CH 4 Separation, C 1 - with C 2 + The isolated abbreviation for C 1 - / C 2 + Separation, C 1 - with C 2 The isolated abbreviation for C 1 - / C 2 separate. [0004] C in light hydrocarbon separation process 1 - / C 2 + Separation or C 1 - / C 2 Separation is also known as "demethanization". Demethanizatio...

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): C07C11/04C07C7/00C07C7/11C07C7/04
CPCF25J3/0242F25J3/0219F25J3/0233F25J3/0238F25J2200/74F25J2200/78F25J2205/02F25J2205/04F25J2210/12F25J2215/62F25J2270/04F25J2270/12F25J2270/60
Inventor 罗自坚徐文浩
Owner BC P INC CHINA NAT PETROLEUM CORP
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