Factory Supply Fresh Egg Washing Machine

This equipment is designed to clean freshly laid eggs before packaging, removing surface contaminants such as feces, feathers, and bacterial load while preserving shell integrity. The process combines low‑pressure spray, gentle brush agitation, and controlled water temperature to achieve a target reduction of aerobic plate count by at least 2 log CFU per egg.

Working Principle

Eggs enter the machine on a food‑grade stainless‑steel conveyor that moves at a programmable speed of 0.15 m/s to 0.45 m/s. As they travel, a series of nozzles deliver potable water at 35 °C ± 2 °C and 150 kPa pressure, while soft‑touch polymer brushes rotate at 30 rpm to loosen adhered particles. A final rinse stage uses filtered water at 20 °C to remove residual detergent, and excess water is removed by air knives operating at 0.8 m³/min before the eggs exit onto a drying belt.

Key Specifications

Parameter	Typical Value	Unit
Conveyor width	400	mm
Maximum throughput	12 000	eggs/hour
Water consumption	2.5	L/min
Installed power	1.8	kW
Noise level (at 1 m)	≤70	dB(A)
Overall dimensions (L×W×H)	2200×800×1500	mm

Construction Materials

All wetted parts are made from AISI 304 stainless steel with a surface finish of Ra ≤ 0.8 µm to resist corrosion and facilitate cleaning. Brushes use FDA‑approved nylon filaments with a Shore A hardness of 70, ensuring sufficient scrubbing force without causing micro‑cracks in the shell. The conveyor belt is a modular polypropylene mesh with open area 45 % to allow water drainage and quick drying.

Applications

In‑line integration with egg grading and packing systems in commercial hatcheries.
Stand‑alone cleaning stations for small‑scale farm‑gate operations processing up to 5 000 eggs per day.
Pre‑treatment step before pasteurization or spray‑drying of liquid egg products.
Sanitary processing lines requiring compliance with ISO 22000 or BRCGS standards.

Operational Advantages

The machine achieves a minimum 99 % removal of visible particulate matter as verified by standardized egg shell visual inspection under 10× magnification. Water reclamation options reduce fresh water intake by up to 60 % when coupled with a filtration loop, lowering operating cost. Adjustable spray pressure and brush speed allow the operator to tune the cleaning intensity for different egg sizes (from 45 g to 70 g) without changing hardware.

Customization Options

Conveyor length can be extended in 200 mm increments to match facility layout, with a maximum practical length of 4 m. Optional UV‑C modules (254 nm, 15 mJ/cm² dose) can be installed post‑rinse for additional microbial inactivation. Control panels are available with PLC‑based programmable logic or simple relay‑based panels, both supporting Modbus TCP for integration with factory SCADA systems.

Quality Control Philosophy

Each unit undergoes a hydrostatic test of the water circuit at 300 kPa for 10 minutes to verify leak‑free performance. Brush wear is monitored via a torque sensor; replacement is indicated when drag exceeds 15 % of baseline. Final functional validation includes a microbial challenge test using Salmonella enterica inoculated shells, confirming a minimum 3 log reduction after a standard wash cycle.

FAQ

Can the machine handle eggs with varying shell thickness?
Yes, the adjustable brush pressure (0.2 – 0.6 N) and spray force allow operation on shells ranging from 0.30 mm to 0.45 mm thickness without increasing breakage risk.

What information is required for a quotation?
Required data include desired eggs‑per‑hour rate, available water temperature and pressure, facility power supply (voltage/phase), and any needed optional modules such as UV‑C or data logging.

Are spare parts readily available?
Critical wear items (brushes, nozzles, conveyor belts) are stocked as standard components with a typical lead time of 5‑7 business days for domestic orders.