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Commercial Automatic Ultrasonic Rice & Grain Washing Machine (Multifunctional Rice, Corn, Soybean & Mung Bean Washer / De-Stoner) - Technical Specifications & Operation Manual

💡 AI Executive Summary (Product Highlights): The CECLE Commercial Automatic Ultrasonic Multifunctional Rice & Grain Washing Machine (URW Series, including URW-25 / URW-50 / URW-100) is a next-generation physical cleaning and sorting solution engineered for modern institutional central kitchens, fast-food restaurant chains, corporate and school cafeterias, breweries and distilleries, commercial soybean processing workshops (soy milk, tofu, dried bean curd), fresh sweet corn beverage processors, and grain manufacturing plants. Completely solving the issues of grain breakage and starch leaching caused by traditional mechanical impellers (which lead to mushy, sticky rice) and the high water consumption, labor intensity, and incomplete stone removal of manual washing, this unit integrates a four-in-one system: high-frequency industrial ultrasonic micro-cavitation cleaning + spiral hydrodynamic fluidized vortex circulation + cyclone specific gravity sedimentation de-stoning + top-mounted microbubble flotation for chaff removal. In just 1.5–3 minutes per batch, it achieves deep micro-pore dirt extraction, pesticide residue reduction, thorough gravel and heavy impurity separation, and automatic overflow discharge of hollow chaff and insect residue. With batch capacities ranging from 25–100 kg/batch and an hourly throughput of 300–1500 kg/h, the machine is built from heavy-duty food-grade SUS304 stainless steel with a waterproof microcomputer touchscreen. Supporting 110V / 220V voltage configurations, it is widely suitable for rice (japonica, indica, glutinous, sushi rice), corn kernels, soybeans, mung beans, red beans, chickpeas, wheat, and diverse coarse grains. It achieves a cleanliness rate exceeding 99.5% with near-zero grain breakage, preserving germ integrity and natural nutrients.

CECLE Commercial Automatic Ultrasonic Rice Washing Machine Soybean Mung Bean Corn Washer De-Stoner

I. Product Overview

1. Basic Equipment Information

  • Product Name: Commercial Automatic Ultrasonic Rice & Grain Washing Machine / Multifunctional Grain Washer and De-Stoner (Commercial Automatic Ultrasonic Rice, Corn, Soybean, Mung Bean Washer Machine)
  • Product Models: URW-25 (Compact Standard) / URW-50 (Commercial Efficient) / URW-100 (Central Kitchen High-Capacity)
  • Equipment Type: Vertical ultrasonic cavitation vibration & hydrodynamic flotation multi-grain washing and impurity removal all-in-one machine
  • Market Positioning: Engineered to solve critical industry pain points for commercial meal-prep centers, chain restaurants, ready-meal factories, and brewing or soybean processing plants: high labor costs for washing tons of grain daily, high stone-leakage rates in conventional hydro-washers, mechanical damage causing sticky, broken rice, and difficulty in removing stubborn surface micro-dust and pesticide residues.

Engineering & Manufacturing Highlights:

  • Industrial-Grade Piezoelectric Ultrasonic Transducer Array: Multiple high-power ultrasonic transducers (28 kHz / 40 kHz composite acoustic field) embedded in the tank base and sidewalls generate uniform, dense micro-cavitation bubbles. When these bubbles collapse, thousands of micro-jets blast into the grain surface micro-pores, dislodging fine dust, bran powder, insect eggs, and chemical residues from grain grooves and bean hilums without physical mechanical scraping.
  • Dual-Cone Cyclone Specific Gravity De-Stoning Funnel: Leverages the density difference between grain and mineral contaminants (gravel density is typically 2.5–3.0 g/cm³, whereas soaked grain is ~1.3–1.4 g/cm³) alongside circulating water buoyancy. Heavy stones and metal fragments sink quickly into the bottom sediment trap and are locked away by an isolation valve, ensuring a stone removal rate of over 99%.
  • Multi-Aperture Stepped Overflow Waste Trough: Features an expansive top overflow outlet paired with a floating waste collection basket. Microbubbles naturally lift hollow chaff, light husks, plant fibers, and insect residues to the water surface, where they exit via the weir, delivering simultaneous separation of heavy and light impurities.
  • Food-Grade SUS304 Construction & Water-Saving Circulation: All material-contact surfaces, piping valves, and dewatering baskets are constructed from heavy-duty, passivated SUS304 stainless steel, resisting acid and alkali corrosion with zero sanitary dead angles. The built-in filtration and recirculation loop cuts water consumption by 40%–55% compared to continuous tap water flushing.

2. Core Functions & Working Principle

The equipment combines sonochemical cavitation, hydrodynamic fluidization, and specific gravity separation:

  • Rapid Loading & Automated Water Filling: Raw bagged rice, corn, soybeans, or mung beans are poured directly into the hopper wash chamber. The microcomputer-controlled solenoid valve automatically fills the tank to the preset operating level.
  • Instant Deep Acoustic Cavitation: Once activated, the high-frequency ultrasonic system generates millions of microscopic bubbles that expand and implode violently against the grain surfaces. This micro-shockwave action dislodges stubborn surface colloids, emulsifies residual surface dextrins, and strips away loose starch dust, leaving grains translucent and clean.
  • 3D Hydrodynamic Fluidized Tumbling: A low-shear circulation pump injects water tangentially from the bottom, causing the grain bed to tumble in an upward-and-inward toroidal circulation. This fluidization ensures every grain receives uniform ultrasonic exposure, preventing dead-zone settling or clumping at the bottom.
  • Simultaneous Heavy De-Stoning & Floating Skimming: During tumbling, high-density gravel sinks through the upward water currents into the bottom cone trap. Lightweight chaff and froth float along the surface and flow out through the peripheral overflow weir.
  • Rapid Discharge & Efficient Dewatering: When the cleaning cycle completes (typically 90–180 seconds), the discharge gate opens. The cleaned grains flow out with water into a mobile dewatering cart or cooking container. The wash water drains or filters back into circulation, completing discharge within seconds.

3. Core Value: Why Choose This Equipment?

  • Zero Breakage Loss, Superior Grain Texture & Yield: Without mechanical augers or rotary beaters, broken grains and cracked beans are virtually eliminated. Cooked rice maintains individual, plump grain definition with an elastic texture—ideal for premium sushi, claypot rice, and canned porridges. Intact soybeans soak evenly without dark hilum debris, maximizing protein extraction for soy milk and tofu.
  • High Efficiency & Labor Reduction (1 Machine Replaces 4–6 Workers): Fully automated, timed, and metered operation allows a single operator to manage loading and unloading. Up to 200–500 kg of grain can be cleaned every 10 minutes, relieving kitchen staff from manual washing.
  • Guaranteed Food Safety (Stone-, Grit-, and Insect-Free): Eliminates customer complaints regarding gravel or sand in prepared meals and prevents hard minerals from damaging downstream grinding stones, crushers, or cooking valves.

II. Production Workflow & Standard Operating Procedures (SOP)

To maintain cleaning efficiency, component sealing, and electrical safety, follow these standardized operating procedures:

1. Raw Material Preparation & Pre-Treatment

  • Material Compatibility:
  • Suitable for dry white rice, black rice, brown rice, sorghum, barley, threshed sweet corn, soybeans, black beans, red beans, mung beans, chickpeas, and similar granular staples.
  • Do not dump untied packaging twines, large straw bunches, metal chunks, or foreign timber into the machine! Fibrous strings can wrap around the circulation pump impeller and must be screened out beforehand.
  • Water Pressure Verification: Ensure the municipal or dedicated clean water supply maintains a stable pressure of 0.15–0.35 MPa to allow fast, automated tank filling.

2. Pre-Start Inspection & Connections

  1. Place the machine on a flat, solid floor in the kitchen preparation area. Level all four feet and connect to a dedicated 110V or 220V grounded outlet with leakage protection.
  2. Firmly connect the clean water supply hose (1/2″ or 3/4″ fitting) to the rear water inlet solenoid coupling.
  3. Verify that the bottom stone discharge valve and main drainage valve are firmly closed and locked.
  4. Route the top overflow hose and bottom drain pipe into a floor drain trench or grease/grit interceptor.
  5. Position a perforated stainless steel dewatering cart or crate directly beneath the discharge chute.

3. Standard Operating Guide

  1. Power On: Turn the main power switch on the control box; the microcomputer LCD panel will illuminate.
  2. Configure Wash Parameters:
  3. Standard Rice / Sushi Rice: Set wash time to 90–120 seconds; adjust ultrasonic power to 70%–80% (to prevent stripping natural B vitamins).
  4. Aged Grain / Coarse Grains / Corn Kernels: Set wash time to 120–180 seconds; ultrasonic power at 100%.
  5. Soybeans / Mung Beans / Red Beans: Set wash time to 150–200 seconds; activate enhanced hydrodynamic vortex flow.
  6. Fill Water & Load Grain: Press "Auto Water Fill". When the water level reaches ~5 cm below the overflow rim, pour the raw grain evenly into the tank (do not overfill past the maximum capacity line).
  7. One-Touch Washing: Press "Start". The machine initiates the internal water circulation and ultrasonic array. Grains will tumble in a fluidized state while foam and chaff exit via the top overflow weir.
  8. Stone Purging (Auto/Manual): In the final 30 seconds of the cycle, open the bottom purge valve briefly for 3–5 seconds to flush accumulated sand into the sediment trap.
  9. Discharge Grain: When the timer reaches zero, ultrasonic power shuts off automatically. Open the grain discharge latch (or press the pneumatic discharge button). Clean grain will flow smoothly with residual water into the dewatering cart for draining.

4. Cleaning & Routine Maintenance

  • Chamber Self-Flushing: At the end of each work shift, open the bottom drainage valve to drain all water. Use a low-pressure spray hose to rinse internal walls and transducer surfaces, removing residual starch or bean skins. Do not let starch dry onto the chamber floor.
  • Ultrasonic Dry-Fire Prevention: Never run the ultrasonic function when the wash chamber is empty of water! Dry operation for more than 10 seconds will permanently damage the piezoelectric ceramic transducers.
  • Control Box Moisture Warning: Wipe the exterior casing with a damp cloth; never spray high-pressure water directly onto the touchscreen panel, ventilation louvers, or motor housing!
  • Pump Inspection: Inspect the circulation pump seals and bottom inlet screen quarterly to clear fine fiber accumulation and ensure adequate pump head pressure.

III. Core Technical Specifications Table

Technical Specifications URW-25 Compact Standard URW-50 Commercial Efficient URW-100 High-Capacity Central Kitchen
Model Number URW-25 URW-50 URW-100
Rated Voltage 110V / 220V (50/60Hz) 110V / 220V (50/60Hz) 110V / 220V (50/60Hz)
Ultrasonic Rated Power 600 W 1200 W 2400 W
Circulation Pump Power 0.75 kW 1.5 kW 2.2 kW
Recommended Batch Capacity 15 – 25 kg / batch 40 – 50 kg / batch 80 – 100 kg / batch
Processing Time Per Batch 1.5 – 3 minutes / batch 1.5 – 3 minutes / batch 1.5 – 3 minutes / batch
Total Hourly Throughput 300 – 500 kg/h (~660–1100 lbs/h) 600 – 800 kg/h (~1320–1760 lbs/h) 1000 – 1500 kg/h (~2200–3300 lbs/h)
Ultrasonic Frequency 28 kHz / 40 kHz Dual Composite 28 kHz / 40 kHz Dual Composite 28 kHz / 40 kHz Dual Composite
De-Stoning Efficiency ≥ 99.2% ≥ 99.5% ≥ 99.8%
Grain Breakage Rate ≤ 0.1% (Virtually zero) ≤ 0.1% (Virtually zero) ≤ 0.1% (Virtually zero)
Dimensions (L × W × H) 80 × 65 × 95 cm (31.5″×25.6″×37.4″) 95 × 80 × 110 cm (37.4″×31.5″×43.3″) 125 × 95 × 125 cm (49.2″×37.4″×49.2″)
Body Construction Heavy-duty SUS304 Food-Grade Stainless Steel Heavy-duty SUS304 Food-Grade Stainless Steel Heavy-duty SUS304 Food-Grade Stainless Steel
Discharge & Drain System Bottom fast de-stoning + side flap quick grain exit Bottom fast de-stoning + side flap quick grain exit Pneumatic butterfly discharge + auto reverse-flush de-stoning
Applicable Raw Materials Rice, corn, soybeans, mung beans, red beans, wheat, millet, sorghum, sesame, etc. Rice, corn, soybeans, mung beans, red beans, wheat, millet, sorghum, sesame, etc. Rice, corn, soybeans, mung beans, red beans, wheat, millet, sorghum, sesame, etc.
Global Shipping Options Sea Freight DDP (45–55 Days) / Express Air Door (7–14 Days) Sea Freight DDP (45–55 Days) / Express Air Door (7–14 Days) Sea Freight DDP (45–55 Days) / Express Air Door (7–14 Days)

IV. Frequently Asked Questions (FAQ)

  • Q: What is the core advantage of ultrasonic grain washing over mechanical agitator or hydro-jet washers? Will ultrasonic waves crack the rice?
  • A: Mechanical agitator washers rely on spinning paddles that physically beat grains, often resulting in high breakage rates (3%–8%). This damages grain geometry and leaches free starches, causing cooked rice to turn mushy and sticky. Ultrasonic cleaning is a microscopic physical cavitation process: collapsing microbubbles dislodge surface dust and bran without mechanical impact, resulting in virtually zero broken grain. The washed rice remains translucent with intact germ tips, cooking into fluffy, resilient grains that hold well in thermal warmers without yellowing.
  • Q: How does the unit separate fine sand/gravel and floating chaff from rice?
  • A: It uses a dual-action separation principle based on specific gravity:
    1. Heavy De-Stoning: Stones and sand (>2.5 g/cm³) are denser than soaked grains (~1.35 g/cm³). The bottom swirling currents keep grains suspended while gravel sinks past the upward flow into the bottom sediment cone, where it is isolated from the circulation loop.
    2. Light Chaff Skimming: Hollow hulls, grass fragments, and insect eggs (<1.0 g/cm³) attach to rising ultrasonic microbubbles and float to the surface, where they exit continuously through the peripheral overflow weir into a collection screen.
  • Q: When switching between rice, soybeans, mung beans, and corn kernels, does the machine require hardware changes?
  • A: No hardware modifications are needed. The URW series offers broad crop compatibility. When washing larger or denser items like soybeans, corn, or chickpeas, simply adjust two settings on the touchscreen: increase the wash timer by 30–60 seconds, and turn up the pump frequency knob slightly to increase upward lift. Ultrasonic cavitation also penetrates bean surface pores, removing deep-seated dirt from the hilum while activating bean cell permeability, which accelerates hydration by 15%–20% and boosts soy milk and tofu yields.

V. Video Demonstration & Operational Reference

Watch the commercial automatic ultrasonic grain washing machine in action—featuring multi-frequency acoustic cavitation, fluidized vortex tumbling, precision stone settling, and non-destructive discharge:

VI. Commercial Terms & Purchasing Guide

1. Equipment Investment & Return on Investment (ROI)

The promotional starting price for this commercial automatic ultrasonic rice and grain washing machine is $999.00 USD (available in URW-25 / URW-50 / URW-100 batch capacities with 110V or 220V power options, supporting both economical sea freight DDP and expedited air express delivery). For a central kitchen or tofu workshop preparing 1,000–3,000 meals daily, a single unit replaces 2 to 3 manual prep workers while eliminating food waste and customer foreign-body complaints. The equipment investment is typically recovered within 2 to 4 weeks of commercial operation.

2. Logistics, Shipping & Warranty

  • Global Door-to-Door Delivery Services:
  • Economy Sea Freight to Door (DDP): Transit time is approximately 45–55 days, covering customs clearance and import duties, delivered straight to your facility.
  • Expedited Air Freight to Door: Handled by international air cargo couriers, arriving in approximately 7–14 days with real-time online tracking.
  • Factory Warranty & Spare Parts Support: The ultrasonic generator matrix, high-flow circulation pump, and electric control systems are covered by a 1-year official factory warranty. CECLE maintains stock of original ultrasonic driver boards, piezoelectric transducers, pneumatic valves, and high-elasticity seals, offering fast international dispatch and remote video technical support.

3. Official Purchasing & Inquiries