Kiln tail flue gas purification system and method for novel dry-process cement kiln

A flue gas purification system and dry-process cement technology, applied in the field of flue gas purification, can solve the problem of pollutant emissions failing to meet ultra-low emission requirements, reduce the cost and difficulty of renovation, avoid repeated investment, and reduce operating electricity. consumption effect

Pending Publication Date: 2019-05-21
合肥中亚环保科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kiln tail flue gas purification system and purification method of a new dry process cement kiln, which

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
  • Kiln tail flue gas purification system and method for novel dry-process cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] See figure 1 , a new dry-process cement kiln tail flue gas purification system, including a preheater 2, a reducing agent storage tank 7, a reducing agent delivery and hydrolysis device 8, a bag-type dedusting reactor 4 and a kiln tail fan 5. The inlet of the heater 2 is connected to the kiln tail of the cement kiln 1, the outlet of the preheater 2 is provided with a high-temperature fan 3, the reductant storage tank 7 is provided with an out-of-stock r...

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 kiln tail flue gas purification system and method for a novel dry-process cement kiln, the kiln tail flue gas of the cement kiln first enters a preheater for heat exchange and then enters a gas conveying pipeline, a denitration reducing agent is arranged in a reducing agent storage tank, the denitration reducing agent passes through a reducing agent conveying device and ahydrolyzing device to generate ammonia gas, the ammonia gas enters the gas conveying pipeline, the flue gas discharged by the preheater enters a bag-type dust removal reactor along with the ammonia gas, and is in contact with the denitration reducing agent covering the surface of a filter bag to generate a catalytic reduction reaction when passing through the filter bag, NOx in the flue gas is reduced to N2 and H2O, the concentration of the NOx in the flue gas meets the ultra-low emission requirement, and finally the flue gas passes through a kiln tail fan and is discharged through a kiln tail chimney. The bag type dust removal reactor is used for removing dust and NOx at one time, the emission concentration reaches the ultra-low emission requirement; the operation resistance of the system is reduced by more than 50% compared with other process routes.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a novel dry-process cement kiln tail flue gas purification system and purification method. Background technique [0002] With the increasing environmental protection requirements, the reduction of dust and nitrogen oxides in the cement industry has become more and more important. Most of the dust problems at the kiln tail of cement plants are controlled by bag-type dust removal reactors, and the emission concentration can stably meet the ultra-low emission requirements. [0003] At present, NOx in the cement industry is mainly controlled through the SNCR process. The NOx emission concentration is much higher than the ultra-low emission requirement. In order to control the NOx emission concentration, the SNCR system will use excessive reducing agent control during actual operation. This operation mode brings many problems. , such as excessive ammonia escape, corrosion of pipe...

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): B01D53/86B01D53/56B01D46/02B01D46/04
Inventor 施勇穆璐莹沈龙廖玉云朱孝峰陶巍程雪
Owner 合肥中亚环保科技有限公司
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