Solid-liquid separation process for combining multiple-effect evaporation and agitated evaporation

A technology of solid-liquid separation and multi-effect evaporation, applied in multi-effect evaporation, evaporation, separation methods, etc., can solve the problems of reduced multi-effect evaporation treatment efficiency, reduced liquid equilibrium partial pressure, complicated treatment process, etc., to achieve energy efficiency. The effect of integration and comprehensive utilization, reduction of energy consumption for solid-liquid separation, and improvement of transportation convenience

Active Publication Date: 2015-04-29
NANTONG CELLULOSE FIBERS CO LTD
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct evaporation of solution is a simple and direct method to achieve solid-liquid separation by changing the concentration of solute in the solution, but the problem of direct evaporation is high energy consumption, and the solid content increases with the precipitation of solute in the solution during the evaporation process It is easy to cause fouling and blockage of equipment
[0003] In addition, as the solid content concentration increases, the equilibrium partial pressure of the liquid decreases, whic

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
  • Solid-liquid separation process for combining multiple-effect evaporation and agitated evaporation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The acetic acid-water solution system contains potassium chloride, phosphoric acid and its metal and ammonium salts, organic phosphoric acid and its metal and ammonium salts, and acetamide, with a total mass content of about 4.5%.

[0046] The pretreated acetic acid-water solution is transported to the three-effect evaporator through the feed pump for evaporation treatment. In the first-effect evaporator, steam is used as the external heat source, and the acetic acid-water solution system is heated in a downstream manner. When the three-effect separator When the concentration of dissolved solids in the mixed solution reaches 35% (at this time, it can be ensured that the total treatment capacity of multi-effect evaporation will be reduced by less than 20% due to the increase of solid concentration, and the multi-effect evaporation equipment will not be scaled and blocked, and the energy consumed by stirring and evaporation will be guaranteed. less than 5% of the total eva...

Embodiment 2

[0048] The formic acid-water solution system contains sodium chloride, diammonium hydrogen phosphate, and ammonium acetate, and its total mass content reaches 0.5%.

[0049] The pretreated formic acid-water solution is transported to the four-effect evaporator through the feed pump for evaporation treatment. In the first-effect evaporator, hot water is used as the external heat source, and the formic acid-water solution system is heated in a countercurrent manner. When the four-effect separator When the concentration of dissolved solids in the mixed solution reaches 25% (at this time, it can be ensured that the total treatment capacity of multi-effect evaporation will be reduced by less than 20% due to the increase of solid concentration, and the multi-effect evaporation equipment will not be scaled and blocked, and the energy consumed by stirring and evaporation will be guaranteed. less than 5% of the total evaporation energy), discharge the mixed solution into the stirred eva...

Embodiment 3

[0051] The ethanol-water solution system contains potassium sulfate, ammonium dihydrogen phosphate, and ammonium acetate, and its total mass content reaches 0.1%. The pretreated ethanol-water solution is transported to the five-effect evaporator through the feed pump for evaporation treatment. In the first-effect evaporator, the heat transfer oil is used as the external heat source, and the ethanol-water solution system is heated in a cross-flow manner. When the five-effect evaporator When the concentration of dissolved solids in the mixed solution in the effect separator reaches 30% (at this time, it can be ensured that the total treatment capacity of the multi-effect evaporation will be reduced by less than 20% due to the increase of the solid concentration, and the multi-effect evaporation equipment will not be scaled and blocked, and the stirring evaporation will be ensured. The energy consumed is less than 5% of the total evaporation energy), and the mixed solution is disc...

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

A solid-liquid separation process, comprising the following steps: A. concentrating an aqueous solution or a mixed solution in water-organic solvents containing soluble solids at a low concentration to give a medium-concentrated mixed solution; B. discharging the medium-concentrated mixed solution into a stirring evaporation kettle (9), and further concentrating same by evaporation to give a high-concentrated mixed solution; and C. controlling the solid content of the high-concentrated mixed solution to ensure that same is discharged out of the stirring evaporation kettle (9) in the liquid form; returning the vapour generated in step B to the multi-effect evaporation system and heating the liquid while the vapour phase is condensing, such that the heat is recovered and the recovery of the solution is ensured. The high-concentrated mixed solution discharged in the liquid form in step C is cooled and solidified.

Description

technical field [0001] The invention relates to a process method for solid-liquid separation using multi-effect evaporation combined with stirring evaporation, which belongs to the technical field of chemical engineering and process solid-liquid separation, and specifically relates to a solid-liquid solution of a water-organic solvent mixed solution containing low-concentration soluble solids. liquid separation process. Background technique [0002] Separation of soluble substances from solutions is a common chemical problem. According to the solubility of the soluble matter in the solvent, generally adjusting the temperature, pH, solution concentration and other parameters can achieve the purpose of soluble matter precipitation. Direct evaporation of solution is a simple and direct method to achieve solid-liquid separation by changing the concentration of solute in the solution, but the problem of direct evaporation is high energy consumption, and the solid content increas...

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): B01D1/26B01D1/00
CPCB01D1/26Y02P70/10
Inventor 许松伟彭为骏张杰陆庆权沈贵文于星丹尼斯·法伦崔磊
Owner NANTONG CELLULOSE FIBERS CO LTD
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