Unlock instant, AI-driven research and patent intelligence for your innovation.

Two-stage catalytic denitrification device and method for removing nitrate in water

A nitrate and denitrification technology, applied in the field of water treatment, can solve the problems of catalyst selectivity and catalytic rate contradiction, achieve the effects of improving denitrification efficiency and nitrogen selectivity, ensuring reaction efficiency and saving time

Pending Publication Date: 2020-09-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of contradiction between the selectivity of the catalyst to nitrogen and the catalytic rate when the existing equipment adopts a single-stage reaction device

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
  • Two-stage catalytic denitrification device and method for removing nitrate in water
  • Two-stage catalytic denitrification device and method for removing nitrate in water
  • Two-stage catalytic denitrification device and method for removing nitrate in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This embodiment discloses a two-stage catalytic denitrification device for removing nitrate in water. A water distribution and gas distribution unit 1, a primary reaction unit 2, a secondary reaction unit 4, and a water and gas outlet unit 5 are sequentially arranged inside the cylinder. A transition unit 3 is set between the primary reaction unit 2 and the secondary reaction unit 4. The water to be treated first enters the primary reaction unit 2 for catalytic reaction, and then enters the secondary reaction unit 4 through the transition unit 3 for catalytic reaction; the primary reaction unit 2 A first catalyst 22 is provided, and the secondary reaction unit 4 is provided with a second catalyst 41;

[0053] The water distribution and air distribution unit 1 is located at the bottom of the cylinder, and is provided with an air inlet pipe 13 and a water inlet pipe 14; Long-handle filter head 12; the effect of long-handle filter head 12 is to evenly distribute water, and...

Embodiment 2

[0065] This embodiment discloses a two-stage catalytic denitrification method for removing nitrate in water, comprising the following steps:

[0066] Step 1, after the water to be treated is adjusted to pH 10-11, it enters the primary reaction unit 2 of the two-stage catalytic denitrification device through the water distribution and gas distribution unit 1, and uses the first catalyst 22 to carry out catalytic treatment on the water to be treated, and then enters the transition unit 3;

[0067] Step 2, the transition unit 3 adjusts the pH of the water to be treated flowing in from the primary reaction unit 2; then enters the secondary reaction unit 4;

[0068] Step 3, the secondary reaction unit 4 uses the second catalyst 41 to carry out catalytic treatment on the water to be treated flowing in from the transition unit 3, and finally realizes the denitrification treatment of the water to be treated together with the primary reaction unit 2; The air intake pipe 13 in the wate...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a two-stage catalytic denitrification device and method for removing nitrate in water. The device comprises a cylinder; a first-stage reaction unit and a second-stage reactionunit are sequentially arranged in the cylinder; a transition unit is arranged between the first-stage reaction unit and the second-stage reaction unit; and water to be treated firstly enters the first-stage reaction unit to be subjected to catalytic reaction and then enters the second-stage reaction unit through a transition unit to be subjected to catalytic reaction; the first-stage reaction unitis provided with a first catalyst, and the second-stage reaction unit is provided with a second catalyst. The catalytic device is provided with the two stages of catalytic reactors, and the reductionprocesses of the reactors are different, so that compared with a single catalytic reactor, the catalytic device is more favorable for controlling a reaction process. The pH value in the first-stage catalytic reactor is relatively high, so that the conversion rate of nitrate can be remarkably increased; the pH value of the second-stage catalytic reactor is relatively low, so that the rate of the conversion of nitrite to nitrogen can be increased.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a two-stage catalytic denitrification device and method for removing nitrate in water. Background technique [0002] High-concentration nitrate wastewater is a kind of wastewater with high nitrogen load. The effluent of aerobic nitrification of sludge digestion liquid in sewage treatment plants and other industrial wastewater can produce high-concentration nitrate, which not only increases the denitrification of sewage treatment plants Insufficient organic carbon sources will affect the denitrification effect and affect the quality of effluent water. Economically and effectively denitrification of high-concentration nitrate wastewater is an important task in sewage treatment. At present, the reaction mechanism generally accepted and recognized by scholars at home and abroad is the "two-stage theory": under the catalysis of the catalyst, nitrate is first reduced to nitrite, a...

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): C02F9/14C02F101/16
CPCC02F9/00C02F1/66C02F1/70C02F3/28C02F2101/163
Inventor 张志强史蓉卢金锁袁宏林贾博涵
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Features
  • R&D
  • 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