Ammonia stripping tail gas treatment method, ammonia-nitrogen wastewater treatment method and equipment

A technology for ammonia nitrogen wastewater and tail gas treatment, which is applied in degassed water/sewage treatment, water/sludge/sewage treatment, separation methods, etc., to achieve the effect of improving the absorption rate

Inactive Publication Date: 2014-10-29
湖南中金岭南康盟环保科技有限公司
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for treating ammonia blow-off tail gas, a method and equipment for treating ammonia-nitrogen-containing wastewater, so as to solve the technical problem of ammonia recovery in the waste gas produced after the blow-off method is used to treat ammonia-nitrogen-containing wastewater in the prior art

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
  • Ammonia stripping tail gas treatment method, ammonia-nitrogen wastewater treatment method and equipment
  • Ammonia stripping tail gas treatment method, ammonia-nitrogen wastewater treatment method and equipment
  • Ammonia stripping tail gas treatment method, ammonia-nitrogen wastewater treatment method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] use as Figure 4 The device shown is processed. The wastewater comes from the ammonium tungstate crystallization mother liquor, and the wastewater flow rate is 8.0m 3 / hour, the concentration of ammonia nitrogen in wastewater is about 7000mg / L.

[0052] Adjust the pH value: adjust the pH value of the wastewater to 12.0 with lime.

[0053] Stripping: During the continuous stripping process of wastewater, the concentration of ammonia nitrogen in the effluent is stable at about 370mg / L, and there is no fouling phenomenon in the stripping tower 5. The absorption tail gas circulates into the stripping tower 5 and replaces air as the stripping gas flow.

[0054] Absorption: The exhaust gas is absorbed by the mixture of 98% concentrated sulfuric acid and ammonium sulfate solution (crystallization mother liquor). The absorption liquid is concentrated sulfuric acid and crystallization mother liquor with a mass volume ratio of 15kg: 1m 3 , the solid content of the crystalliz...

Embodiment 2

[0057] The difference with Example 1 is: when the pH value is adjusted, the pH value of the nitrogen wastewater is adjusted to 10.0; the absorption liquid is concentrated sulfuric acid and the crystallization mother liquor is 8kg by mass volume: 1m 3 The concentrated sulfuric acid concentration is 81%; the seed crystal solid content in the crystallization mother liquor is 60%; the acidity in the crystallization mother liquor is 2mmol / L; the stirring speed in the crystallization step is 30rpm.

Embodiment 3

[0059] The difference with Example 1 is: when the pH value is adjusted, the pH value of the nitrogen wastewater is adjusted to 13.0; the absorption liquid is concentrated sulfuric acid and crystallization mother liquor by mass volume ratio 20kg: 1m 3 The concentrated sulfuric acid concentration is 98%; the seed crystal solid content in the crystallization mother liquor is 20%; the acidity in the crystallization mother liquor is 10mmol / L; the stirring speed in the crystallization step is 60rpm.

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
Bronsted acidityaaaaaaaaaa
Bronsted acidityaaaaaaaaaa
Bronsted acidityaaaaaaaaaa
Login to view more

Abstract

The invention provides an ammonia stripping tail gas treatment method, an ammonia-nitrogen wastewater treatment method and equipment. The ammonia stripping tail gas treatment method comprises the following steps: (1) absorption: introducing stripping tail gas into an absorption liquid so as to obtain absorption tail gas and an ammonia-containing liquid; and (2) crystallization: guiding the ammonia-containing liquid into a crystallization mother liquor to be crystallized so as to obtain ammonium sulfate crystal, wherein the absorption liquid is a mixed liquid formed by mixing concentrated sulfuric acid and a crystallization mother liquid according to the mass volume ratio of (8-20)kg to 1 m<3>, and the seed crystal solid content in the crystallization mother liquid is 20-60%. The method can be used for preventing the problem that ammonium sulfate solution is directly crystallized in an absorption tower without additionally added seed crystals, so that the bottom of a crystallization tower and an outlet pipeline at the bottom of the crystallization tower are blocked by crystallized products.

Description

technical field [0001] The invention relates to the field of ammonia-nitrogen wastewater treatment, in particular to a method for treating ammonia blown off tail gas, a method and equipment for treating ammonia-nitrogen-containing wastewater. Background technique [0002] Smelting, chemical industry, electroplating, breeding and other industries will produce ammonia nitrogen wastewater, which has a wide range of sources and a large amount of discharge. Excessive ammonia nitrogen in the wastewater will cause algae and other microorganisms to multiply, resulting in eutrophication of the water body, accelerating the consumption of dissolved oxygen in the water body, and leading to the death of various organisms in the water body. The danger is serious. The ammonia nitrogen content in wastewater has been listed as one of the binding indicators for emission reduction in the "Twelfth Five-Year Plan" in my country. How to efficiently and economically treat high-concentration ammo...

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): B01D53/79B01D53/58B01D53/73C01C1/24C02F9/04C02F1/20
CPCY02A50/20
Inventor 周康根彭佳乐姜科
Owner 湖南中金岭南康盟环保科技有限公司
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