Kidney Beans Cleaning Solution

一、What problems might be encountered in the cleaning and processing of kidney beans?

The freshly harvested kidney beans contain a great deal of impurities, including straw, bean pods, grass stems, small clods of earth, pebbles, sand, and bits of grass. The complexity of these impurities makes the later cleaning of the kidney beans very difficult.

1、The impurities are complex and difficult to remove.

● Light impurities are difficult to separate completely:

Broken pods, bean shells, dried stems and leaves, and dust easily stick to kidney beans; during wind separation, they are easily blown away along with qualified beans, or accumulate and clog the sieve surface.

● Heavy impurities of similar size are difficult to screen out:

Small stones and clods of soil that are similar in size to kidney beans are difficult to distinguish with ordinary vibrating screens and require a special gravity destoner; when wet, the soil clumps together and adheres to the surface of the beans, increasing the difficulty of cleaning.

2、Material characteristics lead to low cleaning efficiency and high losses.

●  Humidity:

Wet kidney beans easily stick to the sieve and clump together, causing sieve holes to become clogged and sieve efficiency to drop sharply.

●  Uneven size of kidney beans:

The difference in maturity results in kidney beans of varying sizes. Small, qualified beans are more likely to leak out through the large sieve holes (leakage), while large impurities are more likely to be retained (excessive impurity content).

3、Equipment compatibility and operational failures

● Screen problems:

Improper selection of aperture (too large, causing leakage; too small, causing blockage); loose or deformed installation; wear and damage leading to leakage of beans or contamination of impurities.

● Fan parameter imbalance:

Excessive airflow can blow away qualified beans (cleaning loss), while insufficient airflow can fail to remove light impurities; uneven airflow can lead to localized areas with excessive impurities.

4、Quality damage and yield reduction issues

● Mechanical damage:

Vibration, friction, and impact can cause kidney beans to break apart, peel, and crack, affecting their appearance and storage stability, and reducing their commercial value.

● High cleaning loss rate:

Light impurities, including qualified beans, small beans that slip through the sieve, and beans carried by the destoner, can result in a comprehensive loss rate of 3%–8%.

What cleaning machine do kidney beans importers usually use?

When selecting cleaning equipment, kidney bean importers should consider their own business positioning, the characteristics of impurities in the raw kidney beans, and production capacity to choose suitable equipment.The main machine includes the following categories:

● Select equipment based on the characteristics of impurities in raw kidney beans.

1、Long stalks and large clumps of soil → Must be equipped with a kidney bean cylindrical pre cleaner or a kidney bean vibrating pre cleaner (for initial coarse cleaning to protect downstream equipment).

2、Pebble and clods of soil similar in size to kidney beans → Must be equipped with a kidney bean gravity destoner (ordinary sieves cannot remove them).

3、Dust, broken grass, shriveled beans, and mixed beans of different sizes → Select a kidney bean double air screen cleaner.

4、Moldy beans, black spots, insect holes, and weed seeds → Must be used with a kidney bean color sorter.

5、A surface with floating dust and a dull, unsightly appearance → Add a kidney bean polishing machine.

● Equipment Selection Based on Production Capacity

Small importers: 3-7 tons/hour

Typically, they choose single equipment such as air screen cleaners, gravity separators, destoners, and elevators. This requires little space, low investment, and can be operated by one person.

Medium-sized importers: 7-15 tons/hour

Typically, they choose pre cleaner + air screen cleaner + destoner + gravity separator + grading mahcine, operating as a production line.

Large importer processing plants: 30 tons/hour and above

Equipped with a complete production line, including pre cleaner + air screen cleaner + destoner + gravity separator + grading machine + color sorter + polishing machine + dust removal system, enabling continuous production.

How can the purity of kidney beans be improved through the use of cleaning machine?

To achieve a purity of ≤0.1% for kidney beans, free from stones, weed seeds, and mold, the entire set of equipment must be used sequentially; a single machine cannot achieve such high purity. Multiple cleaning devices remove straw, stones, clods of soil, shriveled beans, broken beans, moldy beans, dust, and other impurities from the kidney beans layer by layer, transforming the raw beans into high-purity refined kidney beans.

1、 kidney beans Pre-cleaner:Remove large impurities

The first pre-processing step is to intercept large pieces of straw, bean stalks, large clods of soil, weeds, and bean pods. Removing these large impurities in advance prevents them from clogging the subsequent screens, reduces the burden on the fine cleaning process, and improves the basic purity from the source.

2、 kidney beans air screen cleaner:Remove large and small impurities, as well as light impurities.

The kidney beans air screen cleaner removes light impurities, bean shells, broken grass, dust, small impurities, broken beans and shriveled grains through air separation and screening, initially improving the cleanliness.

3、 kidney beans Gravity de-stoner:Remove the Stones from kidney beans

The kidney bean destoner is specifically designed to remove small stones the same size as kidney beans. Ordinary sieves cannot separate them; only gravity, vibration, and airflow stratification can thoroughly separate heavy and impurities, a crucial step in achieving the required purity.

4、 kidney beans Gravity Separator:Remove shriveled and damaged kidney beans.

Based on the differences in the fullness and density of the kidney beans, they are classified. At the same time, the shriveled, infested and damaged kidney beans are removed.

5、 kidney beans Magnetic Separator:Removing Clods of Soil from kidney beans

The kidney beans magnetic separator uses magnetic force to remove soil and soil clumps. It is mainly used to remove soil from kidney beans.

6、 kidney beans Color Sorter:Precisely removes moldy, blackened, and discolored kidney beans.

The kidney bean color sorter can remove moldy, black-spotted, insect-damaged, sprouted, and discolored beans, directly raising the purity of kidney beans to the high standards of supermarkets and export.

7、 kidney beans grading machine

The kidney beans grading machine sorts the kidney beans by particle size, separating large particles, normal particles, small particles, and broken pods.

By using a complete set of equipment to screen kidney beans for impurities, following a process from coarse to fine, precisely adjusting equipment parameters, and performing routine maintenance, it is easy to achieve high purity kidney beans with low impurity content, free of stones and damaged grains.

二、What technical problems exist in the kidney beans cleaning production line?

1、Kidney bean raw materials have poor adaptability; fluctuations in dryness, moisture content, and size can lead to unstable cleaning.

The raw kidney beans have high moisture content, uneven particle size, and are muddy and clumpy, which easily sticks to the screen surface and clogs the screen holes, resulting in a significant decrease in screening efficiency and excessive impurities.

2、Technical defects of the cleaning machine itself

The screen structure and vibration are not properly matched: the vibration frequency and tilt angle are not universally compatible, causing kidney beans to slide too quickly and have a short residence time, resulting in insufficient screening; the screen mesh is prone to wear, deformation, and clogging: with long-term operation, the screen mesh aperture becomes larger and deformed, leading to leakage and cross-contamination of materials; damp materials are extremely prone to clogging, requiring frequent manual cleaning.

3、Issues related to the process layout and conveying technology of the entire production line

Inappropriate process sequence: Pre-cleaning followed by primary cleaning, or skipping primary cleaning and directly feeding the material into the air sieve, leads to large impurities clogging subsequent equipment and accelerated wear.

Damage to elevators and conveying equipment: Bucket elevators operate at excessively high speeds and have large drop heights, causing thin-skinned kidney beans to easily crack, break, and peel.

4、Mechanical damage and yield issues

The high number of equipment transfers and impacts/frictions results in a high breakage and peeling rate across the entire production line. Light impurities are carried over, beans are missed during screening, and beans are carried over during stone removal, leading to significant overall cleaning losses and substantial raw material waste.

Regarding these issues, how should we design a kidney beans cleaning solution?

In response to the problems of difficult separation of impurities and unstable purity in kidney beans raw materials, we have designed a complete cleaning production line equipment. Through processes such as "pre-treatment → rough cleaning → fine cleaning → classification → polishing → color sorting", along with intelligent debugging and interlocking control, we achieve a closed-loop cleaning process throughout the entire process, and solve various pain points one by one.

Each process is designed specifically to address the corresponding technical issues.

(1) kidney beans pre-cleaner —Raw material pre-treatment

Function:

✅ Remove large impurities, such as straw, grass ropes, burlap sheets, large pieces of soil, bricks, large stones, metal blocks, etc.

✅ The kidney beans pre-cleaner adopts a multi-layer sieve surface vibration classification structure. The upper layer with large holes is responsible for intercepting large impurities, while the middle and lower layers successively separate fine sand, debris and small impurities. This single machine can complete multiple levels of initial cleaning.

Advantages:

✅ The initial cleaning effect is excellent： It can not only remove large debris such as straw, plastic bags, and large soil clumps, but also simultaneously screen out fine sand, soil powder, and small seedlings of grass.

✅ By relying on the mechanical self-cleaning structure, the problem of sieve holes being blocked due to the presence of mud on the surface of kidney beans and slight moisture is solved.

✅ The materials are evenly layered, protecting the subsequent equipment, with a low crushing rate and reducing the loss of raw materials.

(2) kidney beans air screen cleaner —Solve the problems of blocked nets, residual fine and coarse materials, and imbalance of air volume.

Capacity:5-10 Tons per hour

Purity: 99%

Function:

✅ By combining air selection with screening, large impurities, small impurities, light impurities and dust in the kidney beans are removed.

Advantages:

✅ Multifunctional impurity removal：It integrates vibrating screening and air separation functions, allowing one piece of equipment to simultaneously complete the separation of various impurities.

✅ Low material damage rate： Adopting flexible vibration and gentle material conveying design, the material flows smoothly without strong compression or violent collisions.

✅ High versatility, multiple functions in one machine:After replacing the screen mesh and adjusting the air volume parameters, it can be compatible for the separation of crops such as kidney beans and soybeans, suitable for importers of various types of agricultural products, and the equipment utilization rate is high.

(3) kidney beans destoner —Remove the stones from the kidney beans.

Capacity:5-10 Tons per hour

Purity: 99%

Function:

✅ By adjusting the vibration frequency and air volume, the stones in the kidney beans can be removed.

Advantages:

✅ Food-grade stainless steel material：Stainless steel woven countertop, which can directly come into contact with food.

✅ High quality motor:for kidney beans cleaning machine, high quality Japan bearing.

✅ Wide range of application：can adjust the vibration frequency to suitable for different types of beans materials .

(4) kidney beans Gravity Separator  —Remove the damaged or injured beans from the kidney beans.

Capacity:5-10 Tons per hour

Purity: 99%

Function:

✅ The gravity separator can effectively remove diseased kidney beans, damaged kidney beans, rotten kidney beans, deteriorated kidney beans, moldy kidney beans and ineffective kidney beans from kidney beans.

Advantages:

✅ Precisely sorted according to the proportion：By using differences in density and bulk density for separation, it is easy to distinguish: full and good kidney beans, shriveled kidney beans, insect-infested kidney beans, and moldy kidney beans..

✅ Adopting a design with anti-clogging screens： for kidney beans cleaning machine, high quality Japan bearing.

✅ Wide range of applications： One machine can be used for various types of beans.

(5) kidney beans Magnetic separator  —Remove the clods from the kidney beans.

Capacity:5-10 Tons per hour

Purity: 99%

Function:

✅ The gravity separator can remove all metals or clods and soils from kidney beans.

Advantages:

✅ Stainless steel surface :  Used for food processing

✅ Low speed no broken bucket elevator:  Transports kidney beans to the magnetic separator without any damage occurring during the process.

✅ Advanced frequency converter: Can adjust the vibration frequency according to different materials to achieve the best results.

(6) kidney beans grading machine  — separate the kidney beans to different size.

Capacity:5-10 Tons per hour

Function:

✅ Vibration Grader for removing the the big & small impurities or separate different size for kidney beans.

Advantages:

✅  Simple operation: Replaceable screen mesh allows for adaptation to different material classification requirements

✅ Surface undergoes sandblasting treatment: Prevents rusting and moisture absorption.

✅ Advanced frequency converter: Can adjust the vibration frequency according to different materials to achieve the best results.

(7) kidney beans polishing machine  —Polish the surface of the kidney beans.

Capacity:5-10 Tons per hour

Function:

✅ Clean the dust, mud spots and loose soil off the surface of the kidney beans to ensure they have a uniform, smooth and shiny color.

Advantages:

✅  Excellent polishing results: The polishing cloth is made of pure cotton fabric and features good adsorption properties, thereby enhancing the polishing effect.

✅ Durable and with a long service life: The outer cylinder is made of 304 stainless steel mesh, which has excellent durability.

✅ Protect the Environment: The entire polishing chamber operates under a suction negative pressure condition. The generated dust can be promptly removed, preventing the accumulation of dust which could affect the polishing effect.      .

(8) kidney beans color sorter  — Detect and remove moldy kidney beans, discolored beans particles, as well as foreign objects such as glass.

Function:

✅ kidney beans color sorter relies on high-speed image acquisition, intelligent recognition and jet removal principles. By taking advantage of the differences in color, hue, defects and texture among different materials, it can precisely separate abnormal color particles, moldy particles, impurities and various types of particles.

Advantages:

✅  Precisely remove any non-uniform or deteriorated particles: Relying on high-definition optical recognition and intelligent algorithms, it accurately eliminates moldy  beans, diseased spots, insect-infested  beans, blackheads, and abnormal color mixed  beans.

✅ Intelligent operation, simple to operate: Intelligent screen, adjustable parameters, simple operation, stable operation for long-term continuous use.

✅ Highly adaptable and suitable for a variety of materials: The kidney beans color sorter can be switched with one click and is suitable for raw materials from different production areas such as Mexico and Peru.

(9) kidney beans Auto packing machine  — Automatically complete kidney beans quantitative measurement and packaging.

Function:

✅ The kidney beans auto packing machine used for packing the kidney beans, From 10kg-50kg per bag, electronic controlled automatic.At the end of the kidney beans production line, automatic feeding, weighing, discharging and bagging are carried out in a continuous process, replacing manual filling and weight estimation, significantly improving the packaging efficiency.

Advantages:

✅  Precise measurement and weighing: Accurate weighing, small quantitative error, and unified measurement standards.

✅ Save manpower: Reduce the need for multiple people to weigh, carry bags, and prepare ingredients, thereby lowering labor costs.

✅ The operation is simple:One-click setting of weight, automatic adjustment of speed and capacity. Easy to switch specifications. Compatible with various packaging types of beans.

三、The advantages of the kidney beans processing plant?

1、The process is seamless, and impurity removal is comprehensive and thorough.

First, the kidney beans processing plant includes the pre-cleaner, Air screen cleaner, De-stoneer,Gravity separator,magnetic separator, grading machine, polishing machine,color sorter, and Auto packaging machine.The entire production line employs a closed-loop process comprising initial cleaning, air-screen separation, destoning, gravity separation, color sorting, and automated packaging. This sequence systematically removes coarse impurities, dust, grit, stones, shriveled grains, moldy kernels, and off-color contaminants; through this multi-stage, progressive purification, the finished product achieves a high level of purity.

2、High degree of automation, saving manpower

Our entire kidney beans production line is highly automated. The entire process features continuous mechanical transportation, automatic sorting, and quantitative packaging, eliminating the need for manual screening, handling, and weighing. This reduces reliance on human labor and significantly increases processing efficiency.

3、All the components of the entire machine are made from the world's top brands.

The kidney beans processing plant core electrical, transmission, sealing, and sensing components are sourced exclusively from leading international top-tier brands, ensuring that all critical parts feature high-standard configurations. By addressing potential issues—such as wear and tear, aging, electrical faults, and mechanical jamming—at the source, the equipment achieves exceptional operational stability. This results in a significantly reduced failure rate, minimizes downtime for maintenance, and guarantees the long-term, continuous, and efficient operation of the kidney beans processing line.