In the peanut oil processing industry chain, shelling is the most basic yet far-reaching step. The shelling effect not only determines the operating status of subsequent equipment but also directly affects the operating efficiency of peanut Oil pretreatment equipment, the oil yield, and the final residual oil rate. In recent years, as processing enterprises have placed higher demands on stable quality and energy efficiency, the importance of advanced shelling technology has become increasingly prominent.
Leveraging years of experience in oilseed machinery manufacturing, QIE Group has conducted systematic research on peanut shelling processes, continuously optimizing core structures, parameter matching, and air separation systems to launch peanut shelling machines that are stable in performance, have a high shelling rate, and are highly adaptable. This article will comprehensively analyze the impact of shelling equipment on peanut oil processing from three levels: technical parameters, management applications, and operation and maintenance strategies, and provide practical professional suggestions based on actual factory test cases.
In the shelling process, rotation speed, screen mesh size, and airflow adjustment are the three core indicators that determine the shelling quality. Taking the widely used QIE-220 peanut sheller as an example:
Optimal speed range: approximately 1600 r/min
Excessive rotation speed can easily cause kernel breakage and affect the oil channel structure during pressing; insufficient rotation speed will result in incomplete shelling and increased impurity rate.
Screen mesh size: 3.5 mm recommended.
A suitable aperture size ensures that peanuts roll fully on the sieve surface, making the separation of shells and kernels clearer and more stable.
Wind separation air force: The principle is "clean separation without breaking the kernels". If the air force is too weak, shell fragments will remain, affecting subsequent steaming, roasting and pressing; if the air force is too strong, it will carry away whole peanut kernels, resulting in raw material loss.
When the above parameters are properly matched, the breakage rate can be significantly reduced, the shelling purity can be improved, thereby improving the condition of the raw material in the pressing process, reducing the residual oil rate, and improving the overall production efficiency.
In actual production, abnormal shelling situations are not uncommon, for example:
Peanuts are brittle and the breakage rate suddenly increases.
The persistently low peeling rate has led to a decline in oilseed utilization.
Unstable winds cause raw material losses
Screen clogging causes oil to be mixed with shell fragments.
Fluctuations in peeling quality affect subsequent pressing oil yield.
If you encounter similar phenomena in your factory, feel free to leave a message to share your experience. These problems are often closely related to parameter settings, daily maintenance, and differences in raw materials.
Frontline operators directly determine the real-time stability of the equipment; therefore, they should be given special attention.
Ensure the rotational speed remains within the process range and does not fluctuate frequently.
Check the screen for obstructions during each shift and clean it promptly.
The adjustment of the air separation system should take into account both the efficiency of shell-kernel separation and the integrity of kernels.
Perform regular inspections during startup and operation, and report any abnormalities immediately.
Stable shelling quality can create a more uniform raw material for subsequent steaming, roasting and pressing, thereby improving the overall oil yield.
Supervisors should establish a data monitoring system to track the following indicators in real time:
Peeling rate
Breakage rate
Shell debris mixing rate
The correlation trend between residual oil content after pressing and uniformity of steaming and roasting
By periodically analyzing historical data, the causes of fluctuations can be identified in a timely manner, such as changes in raw material moisture content, equipment wear, and operational errors, and adjustments can be made to achieve continuous optimization.
For managers, a stable and reliable peanut shelling machine is not just an investment in equipment, but a key factor determining a company's long-term competitiveness. Recommended for consideration:
Equipment upgrades lead to increased oil yield and decreased residual oil content.
Properly allocate maintenance budgets to prevent performance degradation due to wear and tear.
Promote the upgrading of automated and intelligent detection technologies
Using factory data to guide equipment selection and production line layout
A highly stable shelling system can reduce energy consumption and material loss before pressing, fundamentally improving production capacity and unit profit.
To ensure the long-term efficient operation of peanut oil pretreatment equipment, it is recommended to focus on the following aspects:
Regularly inspect the wear and tear of the shelling machine's main shaft, fan, and screen.
Adjust the moisture content of raw materials according to seasonal changes to reduce breakage.
Perform a full maintenance check monthly, including lubrication, tightening, and cleaning.
Establish a peeling anomaly file to track the causes and improvement measures.
Regularly test the residual oil content during pressing to verify the stability of the pretreatment process.
Preventive maintenance can effectively reduce downtime risks and maintain long-term stable peeling quality.
QIE Group has summarized high-frequency failures and corresponding solutions to help reduce equipment downtime in workshops:
| Fault type | Main symptoms | Key points for inspection and maintenance |
|---|---|---|
| abnormal equipment vibration | Increased noise, uneven peeling | Check rotor dynamic balance, replace worn bearings, and tighten loose parts. |
| Screen clogging | Peanut shells mixed with peanut kernels reduce the shelling rate. | Clean the screen and prevent foreign objects from entering; replace damaged screens. |
| Insufficient air volume from the fan | The separation effect decreased, and peanut shell residue remained. | Adjust the fan impeller angle, clean the air duct, and lubricate regularly. |
High-performance peanut shelling machines not only improve efficiency at a single point but are also the cornerstone of the entire oilseed pretreatment and pressing system. Stable and precise shelling ensures uniform peanut kernel quality, reduces variations during steaming, roasting, and pressing, and ultimately achieves a double improvement in oil yield and oil quality. QIE Group demonstrates the value of this step in safeguarding the entire production line through data and factory case studies, bringing tangible economic benefits to its customers.
QIE Group continues to upgrade and innovate its peanut oil pretreatment equipment, dedicated to helping you optimize your production processes, reduce losses, and enhance the competitiveness of your oil products. Click the link below to explore more solutions and usher in a new era of high efficiency and environmental protection.
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