Traditional grain cleaning equipment is mostly designed in a separate manner, with elevators, vibrating screens, destoners, and air separators placed separately. This results in a large footprint, the need for multiple motors, manual material handling, cumbersome processes, severe dust pollution, and high energy consumption. In contrast, this Combined Grain Cleaner and Destoner integrates air separation, grading and screening, gravity destoner, and automatic feeding functions into a single machine. Relying on its self-priming structure, it automatically transports grain, simultaneously removing light impurities, coarse and fine impurities, and heavy stones with a single feed. One machine completes the entire raw grain purification process, featuring a compact structure, simple operation, energy saving and environmental protection, and a sealed, dust-free environment, making it suitable for the pretreatment of most grain raw materials.
| model | Power (kW) | Yield | spindle speed | Installation dimensions | weight |
| QSX30 | 3kw | 500kg/h | 1440 rpm | 1650x940x2800mm | 260kg |
| QSX40 | 4kw | 800kg/h | 1440 rpm | 1650x940x2800mm | 350kg |
The entire Self-aspirated Grain Cleaner is constructed with a single welded steel frame, integrating all processes into a single machine body. No additional bucket elevator is required. The machine is divided into five core functional units, each working in tandem for fully automatic, cyclical grain cleaning：
The Grain Pre-cleaning Machine features a built-in fan that creates negative pressure suction, eliminating the need for manual shoveling or a separate elevator. Simply place the bagged grain in the bottom feed hopper, and the airflow will automatically draw the grain upwards into the machine, achieving automatic feeding and significantly reducing manual handling and feeding workload. The entire piping system is sealed, preventing grain spillage and dust dispersion during transport.
The Seed Cleaning and Destoning Machine has a built-in independent centrifugal air classifier duct, corresponding to the AIR ASPIRATION air classifier function as indicated on the poster. As the grain passes through the air duct with the airflow, lightweight dust, chaff, straw, and grass clippings are separated and carried away by the airflow, while the heavy, whole grains fall downwards into the screening layer, removing all light, floating impurities in one go, reducing processing dust from the source.
The Grain Cleaning and Stone Removing Machine corresponds to the SCREENING screening module, which internally features two layers of stainless steel screens with different aperture sizes. The upper large-aperture screen intercepts straw, large clumps of mud, and large particle agglomerates; the lower fine-aperture screen removes fine soil and grain fragments, retaining only whole, plump grains. This achieves grading and separation of materials by size, removing all impurities that are significantly different in size from the grains, ensuring that the raw material particles entering the next process are uniform.
The core destoner module of the Integrated Grain Cleaner Destoner, also known as the GRAVITY SEPARATION structure, utilizes the density and weight difference between stones, mud, and grains. Through reciprocating vibration and airflow stratification, heavier stones and hard mud automatically float to the top and are discharged separately, while grains flow downwards for transport. This precisely separates “side stones” of similar size to the grains that are difficult to remove through a sieve, completely preventing hard stones from abrading the grinding rollers and shafts of the downstream grinding equipment.
A sealed discharge structure with separate outlets on each side: a clean finished grain outlet, a gravel outlet, and a light waste outlet. This ensures that various impurities and clean grains are discharged separately, preventing mixing. The entire machine has a fully enclosed sheet metal structure, preventing dust leakage and maintaining a clean and tidy workshop environment.
The entire machine is equipped with a single drive motor. This single motor simultaneously drives the fan, screen, and destoning vibrating layer, providing balanced power distribution. Compared to multi-unit cleaning equipment, this results in lower energy consumption, simpler wiring, and a much lower installation and commissioning threshold.
The Aspiration Type Grain Separator operates on a fully automated cycle through four continuous processes: negative pressure self-priming feeding → air separation of light and impurities → multi-layer sieve grading and impurity removal → gravity destone removal. Simply place the raw material at the bottom feed position; no manual intervention is required for material transfer throughout the entire process. The complete processing flow consists of four steps:
1. Negative Pressure Self-Priming Automatic Feeding: After starting the Vibrating Destoner Machine, the built-in fan generates stable negative pressure suction. Grain raw materials such as wheat, corn, and rice in the bottom hopper are automatically drawn upwards into the equipment through the vertical pipe. No continuous manual feeding or external lifting equipment is needed. The automatic, uniform feeding speed is consistent and stable, preventing material blockage or interruption.
2. Air Separation of Light Impurities: Grains enter the first air separation duct of the Gravity Destoner Machine. High-speed airflow passes through the material layer, carrying away lightweight dust, chaff, straw fragments, and hay dust, which are collected in the waste bin. Full-sized, dense, whole grains fall under gravity and enter the lower grading screen, completing the first step of light impurity purification.
3. Double-Layer Screen Grading and Impurity Removal: The falling grains enter the Multifunction Grain Cleaning System’s double-layer vibrating screen. The upper coarse screen blocks large pieces of straw, mud clumps, and agglomerated debris; the lower fine screen filters fine sand and grain fragments. Only standard-sized whole grains pass through both screens and flow to the bottom gravity destoner chamber. Impurities of different sizes are automatically discharged from the side waste outlet.
4. Gravity-Based Precision Stone Removal: Grain enters the Cereal Cleaning Machine with Destoner gravity destoner platform. The platform vibrates slightly back and forth, combined with uniform airflow at the bottom, causing the material to stratify according to its density: stones and hard lumps, being denser, rise to the top of the platform and are discharged separately; clean grains, being less dense, sink and flow along the channel to the finished product outlet. The final product is clean raw grain free of stones, dust, and straw, which is directly transported to the milling and rice milling main units for further processing.
The entire process of the Combined Grain Cleaner and Destoner can be summarized in one sentence: negative pressure automatic grain suction → airflow removes chaff and dust → sieve separates impurities of various sizes → gravity separation of stones and lumps. The entire grain purification process is completed in a single feeding operation, operating automatically in a closed, dust-free environment.
Ordinary simple cleaning equipment can only remove dust or screen impurities, unable to remove stones simultaneously. This equipment, however, cleans four types of impurities in one process: light rice husk dust, large clumps of straw and mud, fine sand, and high-density stones. The purity of the processed grain is significantly improved, directly solving various production problems caused by impurities in the raw grain.
Once stones and hard mud clumps in the grain enter the milling mill or rice mill, they will directly scratch the alloy grinding rollers, wear down the roller body, and clog the rice milling rollers, frequently causing equipment failures and downtime, resulting in high replacement costs. This machine separates 100% of hard, heavy impurities in advance, preventing hard objects from entering the deep processing equipment at the source, reducing wear on the main equipment, lowering maintenance and replacement costs, and ensuring continuous and stable production line operation.
Flour and rice processed from uncleaned raw grains often have more bran, black spots, and excessive ash content, resulting in low wholesale prices. Grains thoroughly purified by this machine produce clean, fine-textured finished products free of impurities and black spots, meeting national standards for refined rice and flour. This leads to higher market purchase and retail prices, significantly increasing processing plant profits for the same output.
Traditional separate cleaning lines require dedicated personnel to operate the elevator and transfer grain, with multiple machines occupying over 5 square meters. This machine features self-priming and automatic feeding, allowing a single person to oversee the entire cleaning operation. Its compact, integrated design occupies only about 2 square meters, making it suitable for small yards and simple processing workshops without requiring large-scale factory renovations.
The Combined Grain Cleaner and Destoner features a fully enclosed sheet metal body with a built-in dust removal system. All dust during processing is collected in a closed environment, eliminating the dust problem common with traditional grain screening equipment. This protects the respiratory health of operators, reduces grain loss caused by dust, keeps the workshop clean and easy to maintain, and easily passes environmental inspections for grain processing.
Most cleaning and destoner equipment on the market requires a separate bucket elevator, increasing purchase costs and space requirements. The Combined Grain Cleaner and Destoner features a built-in negative pressure self-priming lifting structure, allowing for immediate use upon plugging in, saving on the cost of additional equipment and simplifying installation, reducing potential malfunctions associated with multiple units operating simultaneously.
Integrating four systems—air separation, screening, gravity destoner, and automatic feeding—into a single frame, the Combined Grain Cleaner and Destoner boasts a compact and well-organized structure, suitable for installation in a standard 20㎡ simple processing room or a rural warehouse. The equipment is fully calibrated at the factory; upon arrival, only leveling and power connection are required for production. No professional technicians are needed to assemble multiple units; even beginners can quickly complete installation and commissioning.
The Combined Grain Cleaner and Destoner uses only one main motor to synchronously drive the fan, screen, and destoner vibrating mechanism, while traditional separate cleaning lines require at least 3-4 motors operating simultaneously. For the same grain processing capacity, this machine reduces power consumption by approximately 40%, resulting in substantial and continuous savings on electricity costs for long-term, large-scale grain processing.
The Combined Grain Cleaner and Destoner features a fully sealed sheet metal body, with all dust generated from air separation collected internally. There are no open dust outlets, resulting in extremely low dust concentrations in the workshop during operation, meeting environmental protection standards for grain processing. Furthermore, dust does not carry grain away, with less than 0.3 kg of raw material loss per ton of grain, reducing grain waste.
The screen, airflow, and destone removal platform of the Combined Grain Cleaner and Destoner can all be slightly adjusted. Without replacing the main unit, only fine-tuning the parameters can process dozens of grains such as wheat, corn, rice, millet, and various beans. A single machine can meet all the raw grain cleaning needs of a comprehensive grain processing workshop or a multi-category grain and oil processing plant, eliminating the need to purchase different models.
The Combined Grain Cleaner and Destoner is only suitable for the pretreatment of dry, granular raw grains. It is applicable to various grain and oil processing and miscellaneous grain processing scenarios, covering four major processing categories:
Suitable Raw Materials: Hard wheat, soft wheat, rye, and other milling raw grains. Application Scenarios: Village-level wheat milling workshops, township flour mills, grain purchasing stations. The cleaned wheat is directly fed into the milling machine, producing high-quality refined flour and preventing stones from scratching the milling rollers.
Suitable Raw Materials: Paddy rice, brown rice. Application Scenarios: Rice mills, rice cooperatives. It removes stones, straw, and dust from the paddy rice in advance, preventing damage to the milling machine rollers. The processed rice is white and free of black spots, improving the commercial grade of the rice.
Suitable Raw Materials: Corn, millet, sorghum, buckwheat, oats
Application Scenarios: Coarse grain meal replacement powder processing plants, corn grits processing workshops, township coarse grain collection points. Removes chaff, mud, and clumps of impurities to ensure the cleanliness of the finished coarse grain products.
Suitable Raw Materials: Soybeans, mung beans, red beans, kidney beans, various edible beans
Application Scenarios: Bean product processing plants, bean sorting and processing stores. Removes stones, dirt, and broken pods from beans, resulting in clean beans suitable for oil extraction, bean product making, and packaging for retail.
Applicable business entities include: farmers processing their own raw materials, small village-level grain and oil workshops, medium-sized grain processing plants in townships, grain purchasing and storage stations, and deep-processing enterprises of miscellaneous grains. Whether for small-batch intermittent processing or large-scale continuous production throughout the day, the equipment can be stably adapted.
A: No, no additional purchase or installation of an elevator is needed. The machine has a built-in negative pressure self-priming feeding system with a built-in fan generating suction. Simply place the bagged grain at the bottom of the machine’s feeding position, and the machine will automatically suck the raw material into the machine body for cleaning. It’s ready to operate immediately after unpacking and plugging in electricity, saving on the cost of purchasing additional equipment and reducing the space required in the factory.
A: One machine simultaneously completes four layers of impurity removal, separating all common impurities in one go:
1. Air separation removes light floating impurities such as dust, chaff, straw, and hay;
2. The upper screen intercepts large clumps of mud, long straw, and agglomerated debris;
3. The lower fine screen filters fine sand and grain fragments;
4. The gravity separation platform separates stones and hard mud lumps of similar size to the grain. All impurities are discharged separately, resulting in clean, impurity-free grain.
A: Absolutely. It can process wheat, rice, corn, millet, sorghum, soybeans, mung beans, and other granular grains. The airflow, screen vibration amplitude, and gravity separation platform can all be manually fine-tuned. Switching between raw materials only requires simple parameter adjustments; no replacement of the entire machine is needed. One machine can handle all raw grain pretreatment in a comprehensive grain processing workshop.
A: The entire machine adopts a fully enclosed dustproof sheet metal structure, coupled with a built-in negative pressure air separation dust removal system. All dust generated during processing is collected inside the machine body, with almost no dust scattering outwards. It will not irritate the operator’s respiratory tract, and there will be no grain loss due to dust. The loss per ton of raw grain is extremely low, meeting the environmental protection requirements for grain processing.
A: It can be directly fed into the downstream deep processing equipment. The machine’s gravity separation module is specifically designed for “side-by-side stones,” relying on density differences to stably separate hard stones and mud. Under normal and standardized operation, the stone separation rate is close to 100%, ensuring that no hard objects mix into the clean grain. This protects core components such as the grinding rollers and rice milling rollers from the source, significantly reducing the maintenance and replacement costs of downstream equipment.
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