Fly ash melting tail gas purification technology

A tail gas purification and fly ash technology, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of large secondary fly ash, secondary pollution, etc., to reduce economic costs, avoid sewage, and reduce heavy metal enrichment set of effects

Active Publication Date: 2017-08-01
JIANGSU TIANYING PLASMA TECH CO LTD +1
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry deacidification of the above exhaust gas purification system will still produce

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
  • Fly ash melting tail gas purification technology
  • Fly ash melting tail gas purification technology
  • Fly ash melting tail gas purification technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 It is the process flow diagram of the present embodiment 1.

[0037] A fly ash melting tail gas purification process: the tail gas generated from the plasma arc fly ash melting furnace 1 enters the water spray desuperheating tower 3 through the high-temperature flue 2, cools down to below 100°C, and then enters the crystal nucleus agglomeration chamber 8, and the crystal nucleus The reunion chamber 8 includes a signal generator 4, a power amplifier 5, a sound unit 6, a standing wave elimination layer 7, and a plexiglass observation port 9, and the plexiglass observation port is connected to the body of the crystal nucleus reunion chamber 8 through a flange. After the fly ash molten tail gas enters the crystal nucleus reunion chamber 8, the acoustic unit of the sound wave sound source system installed in the crystal nucleus reunion chamber increases the amplitude of the sound wave in the crystal nucleus reunion chamber, effectively improving the relative...

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 relates to a fly ash melting tail gas purification technology which comprises the following steps: fly ash melting furnace tail gas passes through a quenching device firstly to be cooled to 100 DEG C or below and then enters a crystal nucleus agglomeration chamber, heavy metal chlorides in the tail gas form large-particle-size particulate matters and precipitate out under the action of low-frequency sound wave, the large-particle-size particulate matters are separated out by a two-phase separation device, the tail gas subjected to heavy metal chloride removal continuously passes through a graphite falling film absorption tower to remove HCl gas and then passes through an acid gas scrubbing tower to remove acid gas, and finally, clean tail gas is obtained to be exhausted to the external. The purification technology provided by the invention can fully and effectively remove heavy metal chloride salts and the acid gas, prevent the phenomenon of secondary pollution caused by heavy metal salts and greatly lower the waste water treatment cost of the traditional fly ash treatment technology; and in addition, the heavy metal salts obtained by recovery is equivalent to a special heavy metal rich ore and can be used as a metallurgical raw material.

Description

technical field [0001] The invention relates to a purification process of fly ash melting tail gas. Background technique [0002] The fly ash produced in the waste incineration process contains heavy metals and other substances with high leaching concentration. Among them, Pb, Cd, Cu, Zn and other heavy metals in fly ash are volatile during high temperature treatment, and the heavy metal volatiles condense together with the tail gas to form secondary fly ash. Due to the high content of heavy metals in secondary fly ash, if it is not handled properly, it will be more destructive to the natural environment and human health. [0003] The tail gas produced by the melting process is used to treat the fly ash, and the concentration of acid gas and heavy metals is high. Generally, the purification process is divided into dry process, semi-dry process and wet process. [0004] The dry process uses slaked lime or baking soda to react with acid gas. Due to the high concentration of ...

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): B01D51/08B01D53/14
CPCB01D51/08B01D53/1406B01D53/1431B01D53/145B01D53/1456B01D2257/2045B01D2258/02
Inventor 杨燕玲田君国李要建李军陈竹严圣军
Owner JIANGSU TIANYING PLASMA TECH CO LTD
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