Waste gas reduction and harmlessness treatment method in waste lithium battery recycling process

A waste lithium battery and treatment method technology, which is applied in the field of waste gas treatment in the lithium battery recycling process, can solve the problems of large natural gas consumption, achieve the effects of reducing oxygen costs, better absorption effect, and realization of recycling

Pending Publication Date: 2022-03-01
HUNAN JIANG YE MECHANICAL & ELECTRICAL TECH CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, most companies believe that the exhaust gas does not contain dioxins, and have not set up a dioxin treatment process. In fact, most of the battery packaging is made of PVC materials, which will generate dioxins during the pyrolysis process.
Most of the organic waste gas is treated by incineration, which assists the combustion of natural gas, which consumes a lot of natural gas

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
  • Waste gas reduction and harmlessness treatment method in waste lithium battery recycling process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The 10,000 t / a waste lithium iron phosphate battery production line is crushed under the condition of airtight and nitrogen protection, low-temperature volatilization at 100°C for 1 hour, high-temperature pyrolysis at 550°C for 1 hour, and the amount of tail gas produced is 800m 3 / h, the exhaust gas contains organic components such as electrolyte, pyrolysis gas, and protective gas nitrogen and dioxin. After the waste gas is collected, it is incinerated by oxygen enrichment, the incineration temperature is 1100°C, and the incineration time is 3s. After incineration, part of the heat is recovered through a heat exchanger, and then quenched by water spraying. The spray tower adopts a graphite tower, and the spraying water volume is 1t / h. The residence time of the exhaust gas in the quenching tower is 2s, and the exhaust gas temperature after quenching is below 200°C. The exhaust gas after quenching is sprayed into activated carbon to absorb solid powder such as dust and d...

Embodiment 2

[0027] 10,000 t / a waste ternary battery production line, under the condition of airtight and nitrogen protection, crushing, low-temperature volatilization at 100°C for 1 hour, high-temperature pyrolysis at 550°C for 1 hour, and the amount of exhaust gas produced is 800m 3 / h, the exhaust gas contains organic components such as electrolyte, pyrolysis gas, and protective gas nitrogen and dioxin. The waste gas treatment process is carried out according to Example 1. The voc content in exhaust gas is 9mg / m 3 , HF content 6mg / m 3 , dust content 15mg / m 3 , dioxin content 0.3ng TEQ / Nm 3 .

Embodiment 3

[0029] The 10,000 t / a waste lithium iron phosphate battery production line is crushed under the condition of airtight and nitrogen protection, and high-temperature pyrolysis is carried out at 550°C for 1 hour, and the exhaust gas produced is 500m 3 / h, the exhaust gas contains organic components such as electrolyte, pyrolysis gas, and protective gas nitrogen and dioxin. The waste gas treatment process is carried out according to Example 1. The voc content in exhaust gas is 10mg / m3 3 , HF content 6mg / m 3 , dust content 10mg / m 3 , dioxin content 0.3ng TEQ / Nm 3 .

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 waste gas reduction and harmlessness treatment method in a waste lithium battery recovery process. Waste gas comprises electrolyte gas volatilized in a crushing process, electrolyte waste gas volatilized at a low temperature and organic waste gas generated by high-temperature pyrolysis, and main pollution factors are voc, HF, dioxin and the like. The method comprises the following steps: crushing, volatilizing at low temperature and pyrolyzing at high temperature under closed and nitrogen protection conditions to reduce the gas amount of organic waste gas, incinerating the organic waste gas, cooling the waste gas to below 200 DEG C through quenching to avoid regeneration of dioxin, and finally performing purification treatment through processes of dust removal, water washing and alkali washing to reach the standard and discharging. According to the invention, reduction and innocent treatment of the organic waste gas are realized.

Description

technical field [0001] The invention relates to the treatment of waste gas in the recycling process of lithium batteries, in particular to a treatment method for reducing the amount of waste gas in the recycling process of waste lithium batteries and making it harmless. [0002] technical background [0003] With the vigorous development of the new energy industry, the recycling of waste lithium batteries has also attracted the attention of various industries. The existing recycling technology is not carried out under the condition of airtight nitrogen protection in the process of crushing, volatilization and pyrolysis, but uses large air volume to extract , reduce the concentration of electrolyte and organic waste gas, so as to ensure safe production, and the amount of waste gas generated is about 50,000-100,000 m 3 / h. Moreover, most companies believe that the exhaust gas does not contain dioxins, and have not set up a dioxin treatment process. In fact, most of the battery...

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): B01D53/14B01D53/40B01D53/46B01D53/78C01F11/22C02F1/52F23G5/12F23G5/46F23G7/06F28C1/00H01M10/54C02F103/18
CPCF23G7/06F23G7/065F23G5/12F23G5/46F28C1/00B01D53/78B01D53/40B01D53/46B01D53/1425B01D53/1456B01D53/1493C01F11/22C02F1/5236H01M10/54F28C2001/006B01D2257/2047B01D2258/02B01D2252/103C02F2103/18Y02P20/10Y02W30/84
Inventor 谭文强甄必波刘方方吴光辉
Owner HUNAN JIANG YE MECHANICAL & ELECTRICAL 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