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

Crib slot and falling film volatilization tower

一种栅缝降膜、脱挥塔的技术，应用在蒸馏分离、蒸发、化学仪器和方法等方向，能够解决脱挥效果有负面影响、制造和运行成本高、停留时间不可控等问题，达到界面更新充分、制造及运行费用低、结构简单的效果

Inactive Publication Date: 2004-11-03
XCEED CHEMTECH
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In-tube falling film or downflow liquid column (drop) type devolatilizers can provide a considerable gas-liquid interface, but the interface is basically not updated, and the residence time is uncontrollable, which may affect the devolatilization effect due to insufficient time
Although the horizontal devolatilizer equipped with single-shaft or double-shaft multi-disc (network) stirring can effectively update the interface to a certain extent and adjust the liquid level to control the residence time, the structure is too complicated, and the manufacturing and operating costs are high.
In order to ensure the film formation rate, there must be sufficient depth of liquid layer at the bottom of this type of devolatilizer, and the static pressure head has a negative impact on the devolatilization effect

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
  • Crib slot and falling film volatilization tower
  • Crib slot and falling film volatilization tower
  • Crib slot and falling film volatilization tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: High-viscosity polyester final polycondensation tower

[0061] The diameter of the tower is 1600mm and the height is 8000mm. The tower core is 1000mm×1000mm×6000mm, with 80 layers of grid bars, staggered and vertical, overflow type, the grid pitch of the top layer is 15mm, and the grid pitch of the bottom layer is 37.5mm. The intrinsic viscosity of the prepolymer entering the tower is 0.3, the temperature is 285°C, and the flow rate is 2500 kg / hour. The pressure inside the tower is 100Pa. The intrinsic viscosity of the outgoing polymer is 0.85.

Embodiment 2

[0062] Example 2: CO removal by aqueous solution of ethylene oxide 2

[0063] Hydration of ethylene oxide aqueous solution requires removal of CO before the reaction 2 , to avoid corrosion of equipment.

[0064] The diameter of the degassing tower is 1000mm, the height is 7500mm, the tower core is 620mm×620mm×5000mm, and 80 layers of grid bars are arranged in a mixed arrangement with a grid pitch of 8mm.

[0065] The ethylene oxide aqueous solution containing 2% carbon dioxide enters the tower, the temperature is 40°C, and the flow rate is 60,000 kg / hour. The pressure inside the tower is 0.135MPa. The carbon dioxide in the aqueous solution of ethylene oxide can be removed from the tower.

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
viscosityaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The grid gap falling film devolatilizing tower consists of tower, liquid distributor and tower element. The tower element includes four uprights in four corners and several grid plates and has quadratic or rectangular cross section. Each of the grid plates has one pair of transverse beams, several grid strips and corresponding flow guiding parts. The transverse beams are fixed on the uprights, the grid strips are vertical to the transverse beams, and the flow guiding parts are set between the grid strips. Liquid is made to pass through the falling film in the grid gaps to produce great devolarilizing interface. The special design of the present invention ensure the sufficient updating of the film in different layers. The present invention has simple structure, high devolatilizing efficiency, great operation flexibility and low cost, and may be used in various devolatilizing units.

Description

Technical field: [0001] The invention relates to a gravity falling film devolatilization tower, in particular to a falling film devolatilization tower with a high-ratio interface grid gap constantly renewing the film surface. Background technique: [0002] Devolatilization is an important link in chemical production, and its task is to transfer volatile substances from liquid phase to gas phase. The main ways to improve devolatilization efficiency include: [0003] 1. Increase the temperature of the devolatilization system; [0004] 2. Reduce the partial pressure of the volatile component in the gas phase; [0005] 3. Increase the air-liquid interface; [0006] 4. Update the interface in time. [0007] The temperature of the devolatilization system is subject to the permitting of technological conditions. Reducing the gas phase partial pressure of volatile components can be achieved by controlling the operating pressure of the devolatilizer or using an inert gas as a car...

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): B01D1/22C08F6/00
CPCB01D1/22C08F6/003
Inventor 刘兆彦施景云
Owner XCEED CHEMTECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com