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
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  • Abstract
  • Description
  • Claims
  • Application Information

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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, w

Method used

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

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Example Embodiment

[0024] Example 1

[0025] 10,000 T / A waste phosphate lithium iron battery production line, broken under the conditions of sealed and nitrogen protection, 100 ° C for low temperature volatilization 1 h, 550 ° C for high temperature pyrolysis 1 h, produced at the end of the exhaust gas 800m 3 / h, the exhaust gas contains an electrolyte, a thermal solution and other organic components and protective gas nitrogen, and a dioxin. After the exhaust gas collection, the incineration temperature was 1100 ° C after collecting the exhaust gas, and the incineration time was 3 s. After the incineration, the heat exchanger is recovered by the heat exchanger, and then through the water spray, the spray tower uses the graphite tower, the spray water amount is 1T / h, the exhaust gas is 2s in the acute cold tower, and the temperature is 200 ° C or less. The quenched exhaust gas sprayed in activated carbon, adsorbing the dust and dioxin in the exhaust gas and the solid powder such as dioxin, and ...

Example Embodiment

[0026] Example 2

[0027] 10,000 T / A waste ternary battery production line, breaking under the conditions of sealed and nitrogen protection, 100 ° C for 1 h, 550 ° C for high temperature thermal solution 1 h, resulting in the amount of exhaust gas 800m 3 / h, the exhaust gas contains an electrolyte, a thermal solution and other organic components and protective gas nitrogen, and a dioxin. The exhaust gas treatment process is performed in accordance with Example 1. VOC content of 9mg / m in emissions 3 , HF content 6mg / m 3 , Dust content 15mg / m 3 , Dioxin content 0.3ng TEQ / NM 3 .

Example Embodiment

[0028] Example 3

[0029] 10,000 T / A waste phosphate battery production line, broken under the conditions of sealed and nitrogen protection, 550 ° C for 1 h, resulting in the amount of exhaust gas 500m 3 / h, the exhaust gas contains an electrolyte, a thermal solution and other organic components and protective gas nitrogen, and a dioxin. The exhaust gas treatment process is performed in accordance with Example 1. VOC content 10mg / m in emissions 3 , HF content 6mg / m 3 , Dust content 10mg / m 3 , Dioxin content 0.3ng TEQ / NM 3 .

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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

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Application Information

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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
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