Explosion proof led exit sign in the food factory lighting in the fundamental role and safety application guide

Introduction: food factory safety challenges and explosion-proof indicator lamps inevitable choice

Food factory as involving raw materials processing, high temperature sterilization, cleaning and disinfection and other aspects of industrial scenarios, the long-term face of flour dust, alcohol vapors, ammonia leakage and other explosive environmental risks.

Ordinary lighting equipment in the dust-rich or flammable gas environment, probably due to electric sparks or high temperature surface triggering serious accidents.

Explosion proof led exit sign with its professional explosion-proof certification, corrosion-resistant design and emergency indication function, into a food factory lighting system core safety equipment.

In this paper, we will start from the special risk of food factories, analysis of explosion-proof indicator application value, technical guidelines and implementation strategies for the supply of safe and efficient lighting for enterprises to handle the program.

First, the risk of explosion in food factories and Explosion proof led exit sign βασική αξία

1. the primary safety hazards in food factories

Combustible dust environment: flour, starch processing area dust concentration ≥ 40g/m³, when the ignition source [such as static spark] can trigger an explosion [MIT ≥ 380 ℃]. Milk powder, powdered sugar packaging line dust cloud explosion lower limit [MEC] as low as 30g/m³.

Combustible gases and vapors: alcohol sterilization area [such as 75% ethanol] vapor explosion limit 3.3%-19%. Leakage of ammonia refrigerant in cold rooms [MEC 15%-28%].

Corrosive cleaning environment: CIP [in-situ cleaning] system using strong acid [pH 1], strong alkali [pH 14] solution, accelerating the corrosion of ordinary lamps and lanterns.

2. Explosion proof led exit sign safety protection mechanism

Explosion-proof indicator approved the following technologies to implement intrinsic safety:

Dust and gas double explosion-proof design:

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

Ex d certification [gas explosion-proof]: die-cast aluminum shell explosion-proof chamber, suitable for alcohol vapors and other Zone 1 areas.

Corrosion-resistant and food-grade materials: 316 stainless steel housing or food-grade polycarbonate [FDA compliant], resistant to acid and alkali detergents.

Intelligent emergency function: switch to lithium iron phosphate battery within 0.5 seconds after the main power supply is interrupted, supplying ≥180 minutes of continuous lighting [in line with GB 17945-2010 guidelines].

Second. Explosion proof led exit sign in the food factory core application scenarios

1. Raw material handling and processing area

Flour sieving and mixing equipment: install Explosion proof exit sign on the top of the sifter and mixing tank, and authorize red/yellow lights to warn of excessive dust concentration or equipment overload.

Frying and drying line: use T4 group Explosion proof exit sign [surface temperature ≤135℃] in high temperature area [≥80℃] to prevent flash explosion of grease vapor.

2. cleaning and disinfection and packaging area

Alcohol sterilization workshop: Explosion proof led exit sign integrated gas sensor, alcohol vapor concentration ≥ 20% LEL triggered sound and light alarm and linkage exhaust system.

Aseptic packaging line: IP69K protection level explosion-proof indicator, resistant to 80 ℃ autoclave sterilization, to ensure that the clean room lighting without dead ends.

3. Cold chain and storage area

Ammonia refrigeration plant room: Explosion proof led exit sign is equipped with ammonia detection module, which activates emergency evacuation guidelines and closes refrigeration valves synchronously when the concentration is ≥50ppm.

Low-temperature cold storage: -40 ℃ special explosion-proof indicator built-in battery heating module, to ensure that the extreme environment of the emergency function is normally activated.

Third, the food factory explosion-proof indicator selection and technical guidelines

1. Certification and compliance requirements

Dual explosion-proof certification: ATEX [II 2D Ex tD A21 IP6X T135℃ / II 2G Ex d IIC T4 Gb] or IECEx certification needs to be approved at the same time, to adapt to the dust and gas mixed hazardous environment.

Food contact safety: The surface material of the luminaire should comply with EC1935/2004 food grade guideline to avoid contamination by cleaning agent residue.

2. Fundamental technical parameters

Light source performance: LED light source luminous efficiency ≥ 140lm / W, color temperature 4000K [natural white], color rendering index Ra> 90, accurate identification of food color and foreign matter.

Protection level: clean area needs IP69K [high pressure and high temperature rinsing], general area at least IP66.

3. Intelligent function upgrade

IoT Integration: RS485 or LoRaWAN protocol is approved to access the factory MES system to monitor the status of lamps, battery health and environmental data in real time.

Human-computer interaction design: touch-screen control panel to hold help multi-language switching, a key to trigger the emergency drill mode.

Fourth, Explosion proof led exit sign installation and maintenance specifications

1. Professional installation requirements

Explosion-proof electrical wiring: the use of corrosion-resistant shielded cable [such as LiYCY type], the junction box adopts Ex e increased safety structure, grounding resistance ≤ 4Ω.

Improvement of installation angle: install at an angle of 20° and install a dust cover to reduce the splashing of cleaning agents and dust adhesion.

2. Life cycle maintenance strategy

Weekly cleaning: Wipe the lampshade with food-grade neutral cleaner to avoid strong acid/alkali solution damaging the surface coating.

Quarterly testing: Test the emergency switching response time [≤0.5 seconds] and battery capacity [≥95% charging efficiency after discharging to 50%].

Annual certification: commission a third-party organization to test the gap between the blasting surface [≤0.1mm] and insulation resistance [≥1000MΩ].

Fifth. Answers to Common Problems [FAQ

Q1：What areas of the food factory must use Explosion proof led exit sign?

A: Flour milling area, alcohol disinfection room, ammonia refrigeration plant room Zone 20/21 [dust] or Zone 1 [gas] hazardous areas must be used; office and other non-hazardous areas can be configured with ordinary lights.

Q2：Can the Explosion proof led exit sign directly contact with food?

A: No direct contact! But the surface material should meet the food-grade safety standards to avoid chemical residue contamination of the production line when cleaning.

Q3：How to cope with high-frequency high-pressure flushing resulting in lamps and lanterns sealing failure?

A: Choose IP69K grade, silicone seal [temperature -60 ℃ ~ 200 ℃] explosion-proof indicator, and monthly check the seal compression [deformation ≤ 10%].

Q4：How to extend the battery life of Explosion proof led exit sign?

A: Avoid frequent deep discharging [advocate discharging to 30% that is, charging], and once a month to perform a complete charge-discharge cycle calibration.

Συμπέρασμα: Explosion proof led exit sign – A Double Guarantee of Safety and Efficiency for Food Factories

With increasingly stringent food safety and production compliance requirements, Explosion proof led exit sign have become a core component of the risk prevention and control system in food factories.

Choosing Explosion proof led exit sign that are suitable for dual dust/gas environments, with intelligent monitoring and long life, can not only meet the requirements of ISO 9001, HACCP and other management systems, but also authorize preventive maintenance to reduce the cost of the whole life cycle.

In the future, along with the integration of AIoT and digital twin technology, Explosion proof led exit sign will deeply empower the intelligent upgrade of food factories and escort global food safety.

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