Explosion proof battery light in the flour mill lighting in the fundamental role and dust explosion to get the program

Introduction: flour mill dust explosion risk and Explosion proof battery light protection value

Flour mill as the core scene of grain processing, long-term face of combustible dust [flour particles explosion lower limit of 50g/m³], high humidity and equipment mechanical spark potential threat.

Ordinary lighting equipment in the accumulation of dust or high temperature conditions can easily trigger a short circuit, into the dust explosion trigger.

Explosion proof battery light with its dust explosion-proof certification [Ex tD], anti-dust accumulation design and emergency power supply function, into a flour mill lighting system safety cornerstone.

In this paper, from the dust explosion mechanism, application scenarios, selection guidelines and other dimensions, analysis of Explosion proof battery light for flour mills to build a double safety line of defense.

First, the risk of dust explosion in flour mills and the core value of Explosion proof battery light

1. flour mill primary safety hazards

Dust explosion five elements: combustible dust [flour particles], oxygen, ignition source [sparks / high temperature], dust cloud concentration [≥ lower limit of explosion], confined space [such as silos, conveying pipelines].

Typical hazardous areas:

Zone 20 [permanent presence of dust]: inside the mill, dust collector cartridge area.

Zone 21 [Occasional dust]: Screening plant, packaging lines.

Zone 22 [dust transiently present]: Storage area, loading and unloading platform.

Risk of secondary explosion: the initial explosion shock wave raised the dust deposited on the ground, triggering a larger-scale chain explosion.

2 Explosion proof battery light safety protection mechanism

Explosion proof battery lamp approved the following technology to implement the dust environment intrinsically safe:

Dust explosion-proof structure [Ex tD]: the use of fully sealed shell [IP6X], the maximum surface temperature ≤ 120 ℃ [T5 group], to prevent dust intrusion and surface overheating ignition.

Anti-static and anti-dust accumulation design: surface resistance of the lamp body shell ≤ 1 × 10⁶Ω, tilted structure to reduce dust adhesion, to avoid the formation of an insulating layer leading to heat dissipation failure.

Dual-mode emergency power supply: 0.3 seconds after the interruption of the main power supply to switch to the built-in lithium battery or supercapacitor, supply ≥ 180 minutes of lighting [in line with GB 17945-2010 guidelines].

Second, Explosion proof battery light in the flour mill in the core application scenarios

1. production workshop and processing area

Mill and sieving equipment monitoring: install Explosion proof battery lamp around the mill, approving red/yellow lights to indicate equipment overload or blockage faults, reducing the risk of sparks caused by mechanical friction.

Dedusting system linked lighting: Explosion proof battery light integrated with differential pressure sensors, triggering an alarm when the differential pressure of the dust collector filter bag exceeds the standard and activating emergency lighting to assist in overhauling.

2. Warehousing and logistics area

Silo and hopper lighting: Explosion proof battery light with shockproof bracket to adapt to material impact vibration, to ensure that the internal illumination of the silo ≥ 100lx, to prevent the material from clumping to monitor the blind spot.

Emergency evacuation of loading and unloading platform: set up direction-indicating Explosion proof battery light in the forklift channel, with illuminance ≥5lx on the ground in case of sudden power failure, and arrows guiding the safety exit.

3. Auxiliary area and extreme environment

High humidity environment: flour mill run wheat workshop humidity > 85%, Explosion proof battery light need to have IP67 protection level and anti-mold coating, to avoid short circuit circuit circuit moisture.

Low-temperature warehousing area: cold storage special Explosion proof battery light to help -40 ℃ start, lithium battery equipped with low-temperature heating module, to ensure that extreme temperatures under normal emergency function.

Third, the flour mill explosion-proof emergency light selection and technical guidelines

1. Certification and compliance requirements

Dust explosion-proof certification: must be approved ATEX [III 2D Ex tD A21 IP6X T135 ℃], IECEx or China CNEx certification for Zone 21/22 area.

Mechanical protection level: shell impact resistance level ≥ IK08, to prevent material handling impact damage.

2. Fundamental technical parameters

Light source performance: LED light source light efficiency ≥ 130lm / W, color temperature 5000K [neutral white], color rendering index Ra> 80, accurate identification of flour color abnormalities.

Heat dissipation and temperature control: the use of finned heat sink and intelligent temperature control chip to ensure that the surface temperature of the lamp body ≤ dust cloud minimum ignition temperature [flour MIT about 380 ℃].

3. Intelligent function upgrade

Dust concentration monitoring: integrated PM sensor, real-time monitoring of environmental dust concentration, when exceeding the threshold linkage fan and trigger emergency lighting.

Wireless network control: Approve ZigBee or LoRa to implement cluster control of lamps and lanterns, and the central control room can remotely adjust the brightness and switch the emergency mode.

Fourth, Explosion proof battery light installation and maintenance specifications

1. Professional installation requirements

Sealed dust-proof wiring: using dust-proof cable glands [such as PG thread], the junction box adopts Ex tD explosion-proof structure to ensure that dust can not invade the electrical cavity.

Improved installation angle: the lamps are installed at an angle of ≥15°, utilizing self-cleaning gravity to reduce the accumulation of dust, while avoiding direct light in the eyes of the equipment operator.

2. Lifecycle Maintenance Strategy

Monthly maintenance: Use anti-static brushes to clean the dust on the surface of the luminaire and check the elasticity of the sealing ring (compression permanent deformation rate ≤ 30%).

Annual in-depth testing: commission a third-party organization to test the shell surface temperature, insulation resistance [≥ 500MΩ] and emergency switching response time [≤ 0.5 seconds].

Fifth. Answers to Common Problems [FAQ

Q1：What areas of the flour mill must use Explosion proof battery light?

A: milling workshop, dust collector around [Zone 21] and silo inside [Zone 20] must be used; office and other non-hazardous areas can be configured with ordinary emergency lights.

Q2：Does the explosion-proof emergency light have to meet the gas and dust explosion-proof certification at the same time?

A: If the flour mill exists gas boiler and other mixed risk areas, you need to choose the composite certification [such as Ex d e IIC T4 Gb/Ex tD A21 IP65].

Q3: How to prevent the surface of the lamps and lanterns from accumulating dust to affect heat dissipation?

A: Choose inclined design, nano-dust removal coating Explosion proof battery light, and make a weekly cleaning plan.

Q4: How to maintain the battery of Explosion proof battery light in dusty environment?

A: Selection of fully sealed lithium battery pack, quarterly implementation of 50% deep discharge test, to avoid the battery due to dust and moisture absorption leading to performance degradation.

Conclusion: Explosion proof battery light – flour mill production safety “light barrier”!

Under the background of continuous upgrading of safety guidelines in the grain processing industry, flour mills urgently need to approve a professional explosion-proof emergency lighting system to prevent and control the risk of dust explosion from the source.

The choice of Zone 20/21 zones, intelligent monitoring and long-lasting explosion-proof emergency lighting not only meets international standards such as NFPA 652, but also approves preventive maintenance and reduces the cost of the whole life cycle.

In the future, with the integration of edge computing and AI vision technology, the Explosion proof battery light will evolve into an intelligent perception node for the safety management of flour mills, escorting the sustainable development of the industry.

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