Flare gas recovering technique during producing polypropylene using interval liquid-phase substantial method

A production process and liquid-phase ontology technology, which is applied in the field of torch gas recovery process in the intermittent liquid-phase bulk method polypropylene production process, can solve the problems of waste of raw materials, air pollution, etc., and achieve the effect of reducing emissions and protecting the atmospheric environment

Active Publication Date: 2009-02-04
南京金陵塑胶化工有限公司
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, the vented propylene gas from the safety valve, compressor and propylene pump cannot enter the tail gas recovery system, and most of it is dis...

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
  • Flare gas recovering technique during producing polypropylene using interval liquid-phase substantial method
  • Flare gas recovering technique during producing polypropylene using interval liquid-phase substantial method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0011] In actual operation, all the torch gas is first concentrated from the pipeline to the venting main pipe 200, and the torch gas is cut off by the safety protection device 10. The torch gas includes: air release from the safety valve when the polymerizer is in an accident state, and air release from the safety valve in the event of a dryer accident state , On-site exhaust gas of propylene compressor, air release of condenser, air release of safety valve in storage tank accident state, air release in polymerization kettle accident state, air release in activator tank depressurization, air release in catalyst metering tank. When the pressure of these venting gases is less than the pressure designed in the safety protection device 10, the venting gas will enter the recovery buffer tank 11 to collect, and a chain program 100 is designed between the shut-off valve of the recovery buffer tank and the exhaust gas cabinet 14 to ensure the exhaust gas cabinet The pressure is within...

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 discloses a flare gas recovery process in the production process of polypropylene by an intermittent liquid-phase entity method. The flare gas is collected in a vent line (200); polypropylene particles are removed by a dust collector (15); and then the flare gas is input to a tail gas cabinet (14) for storage; after being compressed by a compressor (16) and condensed by a condenser (17), the tail gas enters a liquid storage tank (18); and non-condensable gas passes through a membrane separation system (13), the high-concentration propylene gas obtained by separation enters the tail gas cabinet (14); and extremely small amount of the lean propylene gas is discharged to a flare (20) by a flare gas vent buffer tank (19), thus actually reducing flare gas emission or even emitting no flare gas; when the content of the propylene at a primary membrane outlet is more than 30%, the flare gas enters a secondary membrane separation system, and a linkage program (100) is designed between a trip valve of a recovery buffer tank and the tail gas cabinet (14). The flare gas recovery process has the advantages of effectively recovering the propylene, environmental protection, saving resources and having positive popularization significance.

Description

technical field [0001] The invention relates to a flare gas recovery process, in particular to a flare gas recovery process in the intermittent liquid-phase bulk polypropylene production process. Background technique [0002] Flare gas is a combustible gas emitted by petrochemical enterprises during production and failure. Flare is a safety device for incinerating these gases. Flare gas contains a large amount of energy and useful components. Recycling flare gas is a major energy-saving and emission-reduction measure. Especially in the process of preparing polypropylene by the batch liquid phase bulk method, due to the characteristics of its own production process, the discharged flare gas contains a large amount of propylene. At this time, it is particularly important to adopt a comprehensive and safe flare recovery system. figure 1 It is a flow chart of the flare gas discharge process in the existing intermittent liquid-phase bulk process polypropylene production process....

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): B01D53/00B01D5/00B01D53/22C07C7/00C07C11/06
Inventor 孙诚辛宝山卢建飞吴义张建英毛昌平成国栋
Owner 南京金陵塑胶化工有限公司
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