Acid wastewater recovery process

A technology of acid wastewater and process, applied in the direction of heating water/sewage treatment, neutralizing water/sewage treatment, multi-stage water/sewage treatment, etc., can solve the problems of high treatment cost, low treatment cost, and low removal utilization rate, etc. Achieve the effect of simple process and low processing cost

Inactive Publication Date: 2019-04-19
山东恒发环保科技有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A large amount of acidic wastewater with high metal content will be produced in industrial production, such as electroplating, metallurgy, sulfuric acid production and other industries. The traditional treatment mostly uses the neutralization method, that is, the acidic wastewater is treated after the acid-base neutralization reaction and precipitation reaction. Acidic wastewater has a high value of recycling and reuse, so the treatment is not only costly, but also a waste of resources
[0003] The current recovery process of acidic wastewater is complex, and multi-stage nanofiltration is used for high treatment cost, low treatment efficiency, and high equipment requirements. When ion exchange resin is used to remove impurities, it is easy to introduce impurities, and the impurities need to be treated again, which is less safe. , the removal utilization rate is low, so a process with low treatment cost and high treatment effect is needed

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
  • Acid wastewater recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of acid waste water recovery process, comprises the following steps:

[0023] Step a: collect the high-concentration acid wastewater with a mass percentage concentration of 20% produced in the workshop into the collection tank through the collection pipe;

[0024] Step b: Lift the collected acid wastewater to a security filter with a filter pore size of 1 μm through a lift pump to filter, in order to prevent impurities in the acid from polluting the membrane system;

[0025] Step c: pass the filtered acid wastewater through a purification device equipped with an acid recovery membrane to obtain pure acid and waste acid after purification, the pure acid is directly reused in production, the waste acid is concentrated, neutralized by adding aluminum hydroxide, and then Evaporate and crystallize to obtain the solid water purifying agent as a by-product.

Embodiment 2

[0027] A kind of acid waste water recovery process, comprises the following steps:

[0028] Step a: collect the high-concentration acid wastewater with a mass percentage concentration of 25% produced in the workshop into the collection tank through the collection pipe;

[0029] Step b: Lift the collected acid wastewater through a lift pump to a security filter with a filter pore size of 5 μm for filtration, in order to prevent impurities in the acid from contaminating the membrane system;

[0030] Step c: pass the filtered acid wastewater through a purification device equipped with an acid recovery membrane to obtain pure acid and waste acid after purification, the pure acid is directly reused in production, the waste acid is concentrated, neutralized by adding aluminum hydroxide, and then Evaporate and crystallize to obtain the solid water purifying agent as a by-product.

Embodiment 3

[0032] A kind of acid waste water recovery process, comprises the following steps:

[0033] Step a: collect the high-concentration acid wastewater with a mass percentage concentration of 30% produced in the workshop into the collection tank through the collection pipe;

[0034] Step b: Lift the collected acid wastewater through a lift pump to a security filter with a filter pore size of 10 μm for filtration, in order to prevent impurities in the acid from polluting the membrane system;

[0035] Step c: pass the filtered acid wastewater through a purification device equipped with an acid recovery membrane to obtain pure acid and waste acid after purification, the pure acid is directly reused in production, the waste acid is concentrated, neutralized by adding aluminum hydroxide, and then Evaporate and crystallize to obtain the solid water purifying agent as a by-product.

[0036] The purification device in the above example was purchased from Beijing Shengda Weixin Technology ...

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 an acidic wastewater recovery process, which belongs to the technical field of wastewater treatment. The acidic wastewater recovery process comprises the following steps of: collecting acidic wastewater into a collecting tank; filtering collected acidic wastewater; purifying filtered acidic wastewater by a purifying device to obtain pure acid and waste acid; concentrating waste acid; according to the process, bivalent ions and multivalent ions in acidic wastewater are removed through an acid recovery membrane which can continuously operate in an extremely acidic environment, so that univalent ions and inorganic acid are completely permeated without generating osmotic pressure, metal ions are concentrated, the removal rate of metal ions is more than 90 percent, the recovery rate of pure acid acid wastewater which can be directly recycled for production is more than 85 percent, the treatment cost is low, the process is simple, and valuable by-products can be obtained.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an acid wastewater recovery process. Background technique [0002] A large amount of acidic wastewater with high metal content will be produced in industrial production, such as electroplating, metallurgy, sulfuric acid production and other industries. The traditional treatment mostly uses the neutralization method, that is, the acidic wastewater is treated after the acid-base neutralization reaction and precipitation reaction. Acidic wastewater has a high value of recycling and reuse, so the treatment is not only costly, but also a waste of resources. [0003] The current recovery process of acidic wastewater is complex, and multi-stage nanofiltration is used for high treatment cost, low treatment efficiency, and high equipment requirements. When ion exchange resin is used to remove impurities, it is easy to introduce impurities, and the impurities need to be treate...

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): C02F9/10
CPCC02F9/00C02F1/44C02F1/001C02F1/04C02F1/66
Inventor 徐洪伟
Owner 山东恒发环保科技有限公司
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