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A Must-Read for Lithium Battery Production! Clearly Define Safety Red Lines for Dust Explosion-Proof Zones (Zones 20/21/22)—Explosion-Proof Dust Collectors Are the Key to Protection.

In lithium-battery production, combustible dusts such as graphite powder and aluminum powder are ubiquitous. Once these dusts mix with air and reach the explosive limit, they can trigger safety incidents upon encountering ignition sources like static electricity or sparks. As a core requirement of industry safety standards, the dust explosion-proof zoning (Zones 20, 21, and 22) serves as the critical basis for classifying risk levels and defining clear protection standards—thus making explosion-proof dust collectors an indispensable "safety barrier" in lithium-battery manufacturing.

First, let’s figure out: How exactly are zones 20, 21, and 22 divided?

The dust explosion-proof zoning, based on the frequency, duration, and concentration of dust occurrence, clearly defines the risk levels of different zones and serves as a prerequisite for equipment selection and safety protection.

Zone 20: Areas where flammable dust clouds persist for long periods or continuously (e.g., inside dust grinding machines, inside material bins)—these pose the highest risk level.

Zone 21: Areas where combustible dust clouds may occasionally occur during normal operation (e.g., near dust conveying pipelines, above dust collector hoppers);

Zone 22: Areas where combustible dust clouds are unlikely to occur under normal operating conditions, and which may only appear briefly under abnormal circumstances (such as in workshop corners or around dust collection points).

Regardless of the zone, as long as combustible dust is present, dust removal equipment meeting the corresponding explosion-proof rating must be installed to comply with safety standards such as GB 15577 and pass compliance inspections.

Why can’t lithium battery production do without explosion-proof dust collectors?

The risk characteristics of different explosion-proof zones dictate that dust removal equipment cannot be “one-size-fits-all.” The core value of specialized explosion-proof dust collectors lies precisely in their ability to precisely match the requirements of each zone and firmly establish a safety barrier.

1. Adapt to zone-specific risks and eliminate the source of ignition: Instruments and meters selected for different explosion-proof zones must meet different explosion-proof ratings. For example, in Zone 21, a wind speed meter compliant with Zone 21 standards should be chosen; in Zone 22, a meter compliant with Zone 22 standards is sufficient.

2. Control dust concentrations and safeguard the safety baseline: By leveraging advanced filtration technology and inerting powders delivered via pre-spraying equipment, we can not only maintain workshop cleanliness at a high standard but also keep dust concentrations in each zone well below the explosion limits. At the same time, valuable raw materials such as graphite powder and cathode material powder can be recovered, reducing waste while minimizing from the source the risk of explosions caused by dust accumulation—achieving triple benefits: “clean production + cost savings + safety protection.”

3. Ensure compliant production and avoid downtime losses: Compliance with safety standards corresponding to explosion-proof zones is a prerequisite for lithium battery companies to pass environmental and safety assessments. At the same time, stable operation helps reduce unplanned shutdowns and ensures continuous production.

4. Protect personnel and equipment, and reduce overall costs: Prevent casualties and equipment damage caused by dust explosions, while also reducing dust-induced wear on production equipment, extending maintenance intervals, and lowering long-term operating costs.

Today, I’d like to recommend a dust collector from Megaunity that’s explosion-proof and dust-free. This dust collector can meet the dust removal requirements for every stage of battery production.

1. Equipped with multi-stage filtration technology, the F9+H14 purification efficiency reaches 99.995%, ensuring clean indoor air after purification.

2. Equipped with patented reverse-blowing technology, it features high reverse-blowing efficiency and low noise, enabling online reverse blowing.

3. It integrates multiple explosion-proof designs, including flame arresters, inerting systems, and venting devices, ensuring safety and reliability.

4. Optimize airflow organization design for greater system energy efficiency.

5. Based on the advantages of BIM-based enhanced design and construction for pipeline networks, installation efficiency has improved by more than 15%.

6. High-stability powder sprayer with a feeding accuracy of up to 200g ±5% per hour.

7. Fully certified for European products.

In short, dust explosion prevention in lithium-ion battery production has clear safety red lines right from the very beginning—starting with zone classification. Explosion-proof dust collectors are not only “compliant equipment” that meets zone protection requirements; they also serve as the core support for safeguarding production safety, ensuring product quality, and reducing operational risks. Only by selecting the right explosion-proof dust collector that is suitable for Zones 20, 21, and 22 can lithium-ion battery production proceed efficiently while remaining safe and compliant.

Industrial Air Handling System Solutions Provider

Tel：400-860-5288

E-mail： marketing@megaunity.com

Address:

No.300, Dongxin Road, Wuzhong District, Suzhou, Jiangsu, China
No.8, Shuzi 3rd Road, DD Port, Dalian Jinpu New Area, Liaoning, China

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