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

A method for controlling phosgene leakage

A phosgene and funnel technology, applied in the direction of phosgene, can solve the problems of simple layout, no alarm system and chain false alarm, collection and treatment of waste gas and waste liquid, etc., to prevent phosgene diffusion and improve efficiency. Effect

Active Publication Date: 2016-01-13
SEDIN ENG
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention not only provides valuable space for the safe evacuation of staff after the phosgene accident, avoids environmental pollution caused by phosgene leakage, but also overcomes the simple arrangement of the spray system in the prior art and the lack of applicability. The alarm system and chain are too simple to cause false alarms and cannot collect and treat waste gas and waste liquid, which has important practical significance

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
  • A method for controlling phosgene leakage
  • A method for controlling phosgene leakage
  • A method for controlling phosgene leakage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Installation of equipment for controlling phosgene leakage

[0037] Each layer of frame structure in the phosgene synthesis and photochemical reaction boundary area is equipped with an outer layer of pressure-holding water pipeline 13 and an inner layer of ammonia water pipeline 12. The two pipelines have the same height and are arranged close to the roof of the frame structure. Each layer of frame structure A cofferdam is provided, wherein the upper cofferdam 18 on the second floor and above is arranged along the outer edge of the frame structure, and the ground cofferdam 19 on the ground is arranged at a certain distance from the outer edge of the frame; a Negative pressure extraction elephant trunk pipe 15, negative pressure extraction elephant trunk pipe 15 is connected with waste gas main pipe 17, waste liquid funnels 10 are arranged at the four corners of each frame structure, and waste liquid funnels 10 on the ground are arranged equidistantly around the frame...

Embodiment 2

[0050] The distance between the pressure-holding water pipeline 13 and the ammonia water pipeline 12 is 0.6m. The height of the upper cofferdam 18 is 20cm, and the ground cofferdam 19 is arranged 2m away from the outer edge of the frame, and its height is 0.4m. Negative pressure extraction elephant trunk pipe 15 is 1m apart from the floor floor height. The horizontal distance between the four corner waste liquid funnels 10 of each frame structure and the cofferdam of this layer is 0.3m, and the distance between every two waste liquid funnels 10 on the ground is 15m.

[0051] Phosgene detectors are equipped with phosgene detectors 16 at 50 cm downwind of the equipment flanges of the phosgene synthesis tower, the phosgenation reactor, the liquid phosgene pump, the phosgene cooler and the condenser, and the phosgene inlet and outlet flanges; For pipelines with a mass content of phosgene of more than 10-100%, install a detector at the lower 50cm of the pipeline every 30m; And th...

Embodiment 3

[0058] The distance between the pressure-holding water pipeline 13 and the ammonia water pipeline 12 is 0.4m. The height of the upper cofferdam 18 is 15cm, and the ground cofferdam 19 is arranged 1m away from the outer edge of the frame, and its height is 0.3m. Negative pressure extraction elephant trunk pipe 15 is 0.7m apart from the floor floor height. The horizontal distance between the four corner waste liquid funnels 10 of each frame structure and the cofferdam of this layer is 0.2m, and the distance between every two waste liquid funnels 10 on the ground is 10m.

[0059]Phosgene detectors are equipped with phosgene detectors 16 at 40 cm downwind of the equipment flanges of the phosgene synthesis tower, the phosgenation reactor, the liquid phosgene pump, the phosgene cooler and the condenser, and the phosgene inlet and outlet flanges; For pipelines with a mass content of phosgene of more than 10-100%, a detector is installed at the lower 40cm of the pipeline every 20m; f...

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

PropertyMeasurementUnit
heightaaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for treating phosgene leakage. The method for treating phosgene leakage includes water curtain block, ammonia fog absorption and negative pressure pump drainage through multi-level alarming manners. When a phosgene detector sends out an alarming signal, a water curtain system and an ammonia fog system are automatically started to perform block and ammonia fog absorption on leaked phosgene and perform negative pressure pump drainage on the phosgene blocked by a water curtain, so that a leaked phosgene control speed is accelerated; waste water formed by the water curtain and an ammonia fog is separated by cofferdams arranged on a framework and a battery limit, collected waste water is conveyed to a sewage processing system for comprehensive treatment, and waste gases formed by negative pressure pump drainage are collected, destroyed by alkali and emptied. The method for treating phosgene leakage has the advantages of multi-level alarming, water curtain blocking, ammonia fog absorption, negative pressure pump drainage, waste water and gas collection, and concentrated treatment.

Description

technical field [0001] The invention belongs to the field of emergency treatment of leaked phosgene, in particular to a method for controlling the leak of phosgene. Background technique [0002] Phosgene is an important chemical raw material and chemical intermediate, mainly used in the fields of polymer materials, pesticides, medicine, spices and fuels, especially in the synthesis of polycarbonate raw materials diphenylmethane diisocyanate (MDI) and polyurethane The raw material toluene diisocyanate (TDI) has an extremely wide range of applications. However, since phosgene is a highly toxic gas that is easily diffused, and carbon monoxide and chlorine are contained in the raw materials for producing phosgene, the synthesis of phosgene and the photochemical reaction have the characteristics of high toxicity, diffusivity, flammability and explosiveness at the same time. , Once phosgene leaks, the consequences will be extremely serious. In recent years, with the rapid develo...

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 Patents(China)
IPC IPC(8): B01D53/14C01B31/28C01B32/80
Inventor 李改英徐晋萍范辉杨富荣田怀成
Owner SEDIN ENG
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