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Wheat Cleaning Process – How It Affects Quality of Flour Milling

The wheat cleaning process is a vital part of wheat flour mill process. It refers to a series of consecutive process steps starting with the cleaning of impurities, wheat moisture regulation and mixing, and continuing until it is ready to enter the wheat flour milling stage.

This ensures that the wheat seeds meet the expected quality standards before it enters the wheat flour production stage, thus guaranteeing the quality and productivity of the final wheat flour.

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In this article, we will introduce the steps of the wheat seed cleaning process before wheat milling and the wheat cleaning machines equipped in the process. As the saying goes, "A good cleanup is half the job." The importance of the wheat cleaning process for milling cannot be ignored, and if you are planning to start a profitable wheat flour mill plant, this will help you make a wise investment decision.

Click to see the complete wheat flour processing process step by step>>

The Importance of Clean Wheat for Flour Milling

  • Effectively improve the quality and purity of flour
  • Prevents damage to flour milling machines
  • Reduces downtime and increases efficiency of wheat flour production
  • Ensure that the flour produced meets hygiene standards

Wheat Cleaning Processes and Seed Cleaners Demystified: The Route to Flour Excellence

The work carried out in the wheat cleaning plants consists of removing impurities from the wheat, which can be achieved using a variety of wheat seed cleaner and techniques, such as sieves, magnetic separators, and so on.

In addition, adjusting the moisture of the wheat is one of the important steps in the cleaning process, and proper moisture adjustment ensures optimal processing of the wheat during flour milling process.

In well-equipped wheat flour mill plants, the cleaning process also involves wheat metering and wastes treatment.

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Some Wheat Cleaning Machines For Sale( Of course they can also be used to clean other grains)

ABC Machinery is your trusted experts in grain processing equipment manufacturing. Whether you're looking to process wheat, corn, cassava, or any other grains, we offer perfect wheat processing machines and comprehensive turnkey project services tailored to your needs. 

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General Wheat Seed Cleaning Machines List

While there is no set pattern to the wheat cleaning process, a typical process should include the following steps and corresponding equipment. (Click to view some models and details of grain cleaning equipment, and you can choose you are satisfied with.)

Process  Role Equipment
Screening Removal of impurities larger or smaller than the wheat seed Cylinder primary screens, vibrating screens, flat rotary screens
De-stoning Removing side-by-side stones from wheat Specific gravity de-stoning machine
Selection Removal of different types of grains such as wheat, rice, barley, oats, etc. Selection machines
Wheat scouring and wheat brushing Removal of impurities from the surface of wheat
Wheat scourer, brushing machines
Magnetic separation Removal of metallic impurities Magnetic separators
Air separation Removal of light impurities  Suction separators
Washing and moistening Cleaning of wheat from surface impurities, moisture conditioning Wheat dampener

In the actual production of wheat processing plants, the wheat cleaning process needs to be designed in accordance with certain principles of the combination of rational layout of the various functions of the wheat cleaning equipment, in order to optimize the cleaning effect.

Wheat cleaning methods are divided into two types: dry cleaning and wet cleaning. The difference is whether or not to use a wheat washing machine.

  • The dry cleaning method uses a wheat dampening machine to adjust the moisture, which consumes less water (1.5%-4%). This method has no waste water discharge and is suitable for large wheat flour processing plants and factories with high environmental protection requirements.
  • The wet cleaning method uses a wheat washing machine to absorb dampen, which consumes a relatively large amount of water (50-100%) and discharges wastewater. It is suitable for small and medium-sized wheat flour milling plants.

The 125TPD Wheat Cleaning Flow Chart and Equipment Combinations

Only a reasonable design of the wheat cleaning process, can use the least wheat seed cleaning equipment, to achieve the best cleaning effect. At the same time, it can also reduce the wear and tear of the working parts, prolong the service life of the wheat seed cleaning machines, and save the production management costs. Here is an example demonstration of the wheat grain cleaning process. 

Read More: Learn about Cost of Setup a Wheat Flour Milling Plant>>

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Wheat Cleaning Process and Equipment Layout Design Drawings

Wheat Cleaning Process Arrangement:

Gross wheat → Gross wheat bin → Automatic scale → Head sieve → Head wheat scouring → De-stoning wheat washing machine → Dampener → Conditioning bin → The second wheat scouring → The second sieve → Magnetic separator → Clean wheat bin → into the grinding mill

[Key Factors] Optimization Of Wheat Cleaning Process: Flow Design and Equipment Combination

In the selection of cleaning equipment and combination of processes, must be based on the net wheat quality standards, and combined with the impurity of the wheat seed, plant production capacity, the type of finished product, the quality of wheat and moisture adjustment methods and other factors for comprehensive consideration.

Requirements for the​ quality of clean wheat to be milled

  • Cleaned wheat in the gravel content of no more than 0.02%, basically no magnetic impurities.
  • Cleaned wheat moisture is appropriate, so that the production of flour moisture in line with national standards.
  • Wheat with a reasonable proportion, moderate wetting time, with appropriate performance of flour production.

According to the ​impurity content of the wheat, adjusting the cleaning process for wheat milling

​Wheat with a large amount of impurities, the design of the cleaning process should be more perfect; wheat with a small amount of impurities, cleaning process can be appropriately simplified.

How to optimize the wheat cleaning process based on impurities?

Wheat Impurity Status How to Optimize
More Buckwheat, Grass Seeds, Barley, and Oats Strengthen Wheat Selecting Process
More Sand, Mud, Coal Residue Intensify Wheat De-stoning Process
More Diseased, Pest-Infested, or Shriveled Wheat Increase Wheat Scouring Process
More Dust Enhance Suction and Dust Removal Process
Low Wheat Moisture Consider Secondary dampening Addition if Necessary

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Processes for small vs. large wheat cleaning plants

The cleaning process or suction dust removal system of small wheat flour mill plants can be simplified appropriately, and combined cleaning equipment is often used. (Related Post: How to Start Small Flour Mill Business>>)

Large-scale wheat flour production plants can use more self-circulating air suction system and have wheat wastes workshops or process.

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Wheat Cleaning Mahchines in A 10TPD Flour Production Line 
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The Wheat Cleaning Part in A 160TPD Flour Mill Plant

Quality and efficiency of wheat cleaning equipment used determines cleaning process adjustments

When using wheat cleaning equipment with good quality and high efficiency, the number of cleaning passes in the process can be appropriately reduced, or a larger equipment flow rate can be selected to reduce the number of equipment.

When the equipment efficiency is poor, the cleaning process should be strengthened or a lower flow value should be adopted.

ABC Machnery's wheat processing machines combines advanced technology with reliable design, using high-standard materials and manufacturing processes, and is committed to providing users with excellent performance and efficient operating experience. If you plan to start a wheat flour mill plant business, contact us for more professional information!

Climate, geographical conditions also have an impact on the design of the cleaning process

For example, in the cold climate, wheat needs to be heated moisture regulation, run wheat warehouse needs to have thermal insulation measures.

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