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

Vacuum dechlorinating and purifying method and special vacuum dechlorinating and purifying device for dilute sulfuric acid which is ionic membrane caustic soda byproduct

The technology of ion membrane caustic soda and purification method is applied in the field of vacuum dechlorination purification method of dilute sulfuric acid by-product of ion membrane caustic soda and its special device field, which can solve problems such as difficulty in recycling, reduce corrosion, improve environmental protection benefits, reduce Effect of Chlorine Content

Active Publication Date: 2017-01-04
新疆中泰绿能环保科技有限公司
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a vacuum dechlorination and purification method for dilute sulfuric acid by-product of ionic membrane caustic soda and its special device, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the difficulty in recycling existing dilute sulfuric acid by-product of ionic membrane caustic soda The problem

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
  • Vacuum dechlorinating and purifying method and special vacuum dechlorinating and purifying device for dilute sulfuric acid which is ionic membrane caustic soda byproduct

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the vacuum dechlorination purification method of this ionic membrane caustic soda by-product dilute sulfuric acid is carried out as follows: the aqueous solution of chlorine-containing dilute sulfuric acid is sent into the dechlorination tower from the top of the dechlorination tower, and then the dechlorination tower The chlorine-containing dilute sulfuric acid aqueous solution in the dechlorination tower is refluxed from the bottom of the dechlorination tower to the top of the dechlorination tower, so that the chlorine-containing dilute sulfuric acid aqueous solution is sent into the dechlorination tower from the top of the dechlorination tower again, that is, the chlorine-containing dilute sulfuric acid aqueous solution The reflux cycle between the bottom of the dechlorination tower and the top of the dechlorination tower, during the reflux cycle of the chlorine-containing dilute sulfuric acid aqueous solution, vacuumize the liquid phase in the dechlorina...

Embodiment 2

[0022]Embodiment 2: As the optimization of the above-mentioned embodiment, the liquid phase after the dechlorination of the dechlorination tower is transported to the top of the analysis tower, and the inside of the analysis tower is vacuumized, and the pressure at the top of the analysis tower is -80KPa to -65KPa , the liquid phase enters the desorption tower from the top of the desorption tower, and then the liquid phase in the desorption tower is transported to the dechlorination evaporator for heating. After the liquid phase is heated, a steam mixture is obtained, and the steam mixture is sent from the lower part of the desorption tower In the desorption tower, the vapor mixture flows upwards in the desorption tower, and during the upward flow, the vapor mixture contacts the liquid phase flowing down from the top of the desorption tower in reverse and performs mass transfer and heat exchange, so that the free dissolved in the liquid phase Chlorine and chlorine gas are separ...

Embodiment 3

[0023] Embodiment 3: as the optimization of embodiment 2, the temperature in the desorption tower is 70 ℃ to 90 ℃; Or / and, when vacuumizing the desorption tower, the chlorine in the desorption tower is extracted out of the desorption tower; Or / and , the dechlorinated sulfuric acid aqueous solution extracted from the dechlorination evaporator is heat-exchanged with the liquid phase before entering the desorption tower, to increase the temperature of the liquid phase entering the dechlorination tower, the temperature of the dechlorinated sulfuric acid aqueous solution exported from the dechlorination evaporator is 60°C to 80°C.

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 the technical fields of treatment methods and treatment devices for dilute sulfuric acid which is an ionic membrane caustic soda byproduct, and discloses a vacuum dechlorinating and purifying method and a special vacuum dechlorinating and purifying device for dilute sulfuric acid which is an ionic membrane caustic soda byproduct. The vacuum dechlorinating and purifying method for the dilute sulfuric acid which is the ionic membrane caustic soda byproduct includes vacuum dechlorinating and purifying and air stripping. The vacuum dechlorinating and purifying method and the special vacuum dechlorinating and purifying device for the dilute sulfuric acid which is the ionic membrane caustic soda byproduct have the advantages that vacuum dechlorinating, air stripping and heating desorption processes are combined with one another, dechlorinating and concentrating effects can be realized, the content of chlorine in the dilute sulfuric acid which is the ionic membrane caustic soda byproduct can be effectively reduced, accordingly, the corrosiveness can be reduced, dechlorinated sulfuric acid aqueous solution can be reused as a resource, in other words, the dechlorinated sulfuric acid aqueous solution obtained after chlorine-containing dilute sulfuric acid aqueous solution is dechlorinated by the aid of the vacuum dechlorinating and purifying method for the dilute sulfuric acid which is the ionic membrane caustic soda byproduct is easy to recycle, and environmental protection benefits, resource benefits and economic benefits of enterprises can be obviously increased.

Description

technical field [0001] The invention relates to the technical field of treatment methods and devices for dilute sulfuric acid by-products of ion-exchange membrane caustic soda, and relates to a vacuum dechlorination and purification method for dilute sulfuric acid by-products of ion-exchange membrane caustic soda and a special device thereof. Background technique [0002] Sulfuric acid is mainly one of the chemical raw materials, and it is often used as a dehydrating agent and intermediate reaction in industry. The concentration of used sulfuric acid is usually reduced and cannot be used for production. This part of waste acid is often treated as waste water, which wastes resources. In the past, the concentrated treatment of waste sulfuric acid was used as a product in the downstream market. However, due to the strong corrosiveness of sulfuric acid, high energy consumption, and low recovery value, most users prefer to treat it as waste. The by-produced dilute sulfuric acid ...

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): C01B17/90
CPCC01B17/90
Inventor 樊庆霈王彦波帕尔哈提·买买提依明赵永禄杨秀玲王利国王凯瑞郭建威刘昌盛焦庆庆王彬
Owner 新疆中泰绿能环保科技有限公司
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