Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Three-stage type nitrogen oxide flue gas absorption based acid preparation system and method

A nitrogen oxides, three-stage technology, applied in the directions of nitrogen oxides/oxyacids, nitric acid, etc., can solve the problems of low conversion rate, inability to achieve industrial utilization, low product concentration, etc., and achieve high conversion efficiency and structure. Simple, fast delivery effects

Pending Publication Date: 2019-01-04
翰克偲诺水务集团有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a three-stage nitrogen oxide flue gas absorption acid production system, which solves the problems in the prior art that the conversion rate is not high, the concentration of the obtained product is not high, and the direct industrial utilization cannot be realized

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
  • Three-stage type nitrogen oxide flue gas absorption based acid preparation system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] as attached figure 1 As shown, the present invention provides a three-stage nitrogen oxide flue gas absorption acid production system, which is simple in structure, scientific and reasonable in design, easy to operate, adopts three-stage absorption, supplemented by high-oxygen air, and can reduce nitrogen oxide The nitrogen oxides in the flue gas are basically absorbed and converted into high-concentration nitric acid, and the conversion efficiency of nitric acid is high. At the same time, the exhaust gas meets the discharge standard. The invention comprises a first absorber 3 with an air inlet on the top and a liquid inlet on the top, a concentrated nitric acid tank 4 with a liquid outlet on the bottom and an outlet for nitrogen oxide flue gas at the top, and an air inlet and nitrogen gas on the top. The second absorber 5 with the oxide flue gas return port, the first dilute nitric acid tank 6 with a liquid inlet at the top and a liquid outlet at the bottom, and the se...

Embodiment 2

[0061] This embodiment discloses a three-stage nitrogen oxide flue gas absorption acid production system acid production method, including the following steps:

[0062] Step (1), premixing;

[0063] The flue gas of nitrogen oxides produced by the reaction kettle is cooled by the pre-condenser under the action of the second Roots blower to the flue gas conveying pipe, and the oxygen delivery pipe is discharged into the flue gas conveying pipe under the action of the first Roots blower. Conveying oxygen-enriched air, oxygen-enriched air and nitrogen oxide flue gas are mixed in the flue gas delivery pipe, while NO in nitrogen oxide flue gas and O in oxygen-enriched air 2 Combination reaction occurs to produce NO 2 , the specific reaction formula is 2NO+O 2 =2NO 2 ;

[0064] Step (2), one-stage absorption;

[0065] The mixed nitrogen oxide flue gas enters the first absorber through the flue gas conveying pipe, and at the same time, the nitric acid solution in the concentrated...

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 a three-stage type nitrogen oxide flue gas absorption based acid preparation system, and solves the problems that conversion rate is not high, concentration of an obtained product is not high and direct industrial utilization cannot be realized in the prior art. The system comprises a first absorber, a concentrated nitric acid tank, a second absorber, a first dilute nitricacid tank, a second dilute nitric acid tank, a tail gas purification tower, a reaction kettle, a front condenser, a tail gas discharge pipe, a flue gas delivery pipe, an oxygen delivery pipe, a firstcyclic absorption pipe, a first circulating pump, a 45% nitric acid output pipe, a secondary flue gas delivery pipe, a second cyclic absorption pipe, a second circulating pump, a third cyclic absorption pipe, a third circulating pump, a nitrogen oxide flue gas return pipe, a tail gas delivery pipe, a tail gas discharge pipe, a pure water delivery pipe and a dilute nitric acid liquid delivery pipe.With the adoption of three-stage type absorption and assistance of high-oxygen air, nitrogen oxide in the nitrogen oxide flue gas can be basically absorbed and converted into high-concentration nitric acid, nitric acid conversion efficiency is high, and meanwhile, the discharged tail gas meets the discharge standard.

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide tail gas treatment, in particular to a three-stage nitrogen oxide flue gas absorption system and method for making acid. Background technique [0002] Nitrogen oxide exhaust gas is a kind of highly toxic yellow smoke. It is discharged into the atmosphere through the chimney without treatment, forming eye-catching brown-yellow smoke, commonly known as "yellow dragon". Among the many exhaust gases, NOx is the most difficult to treat and is the culprit of air pollution. If it is not effectively controlled, it will not only cause great harm to the health of the operators and the environment of the factory area, but also cause public hazards to the lives of surrounding residents and the ecological environment if it spreads with the wind. [0003] According to the different principles of purification, the treatment of nitrogen oxide exhaust gas can be divided into three categories: catalytic redu...

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): C01B21/40
CPCC01B21/40
Inventor 杨旭光
Owner 翰克偲诺水务集团有限公司
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
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