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The Paddy Separator(LIANGGONG) is an oscillation-type paddy separator with a very high sorting performance and an easy maintenance design. All varieties of rice such as long grain, medium grain and short grain can be sorted easily and accurately. It separates a mixture of paddy and brown rice into three distinct classes: paddy, mixture of paddy and brown rice and brown rice, to be sent to a husker, back to the paddy separator and to a rice whitener, respectively.


1. Stable performance

Adjustment during operation is not necessary because of its constant and stable separating performance.

2. Minimized installation space

Compact design and large capacity means that installation space for a given separating capacity is very small.

3. Automatic stop device

Machine automatically stops when the tank is nearly empty.

4. Easy sampling

Samples of brown rice can be taken from a special outlet by diverter valves. for easy inspection of quality and flow.

5. Easy inspection of separating conditions

The discharge side is covered with a transparent cover so that the separating

6. Easy flow adjustment

Flow rates are adjusted by a manual remote lever on "D" model and by increase I decrease buttons on "DR" model.

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Rice Huller(LIANGGONG) as a kind of industrial grain processing machine, is mainly used for hulling paddy and separating rice husk. The rice huller realizes the hulling purpose through the press and twist force between a pair of rubber rollers. Mechanical control system among counter weight and lever maintains a constant pressure between rubber rollers, which ensures a uniform husking ratio. Besides, the gearbox is adopted for speed controller, greatly improving technological effects, lowering consumption and obtaining more economic benefits.

Advantages of MLGT series rice huller

High hulling rate, low broken rice content,perfect separation performance, stable operation, minimized noise.

1. Compact and fully sealed structure avoids the leakage of rice.

2. Rubber rollers are convenient to assemble and disassemble.

3. Adopt vertical air suction duct, highly separate paddy husks.

4. There is no need to dismantle the roller any more once a new one is installed.

5. Adjustable pressure and good ventilation keep rubber wear resistance.

6. Adopting gearbox controller to greatly realize the exchange of roller turn speed.

Working principle of rice huller

The main working part of rice huller is a pair of rubber rollers, which rotate reversely at different speeds. The paddy is squeezed, rubbed and teared when paddy go through the two rubber rollers to achieve hulling process. Afterwards, the rice husk is separated in the discharging chamber, then being sucked out by airflow.

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The most outer rough shell of paddy is removed. Paddy Separator(LIANGGONG) is the most common machine that is used for paddy shelling, however friction type browner is sometimes used as a sheller. Paddy goes between six rubber rollers that are rotating in opposite direction with different velocities. There is a small clearance between the rollers so that when paddy passes through, it is subjected to some shear forces and husk is removed from production process of rice peeled.

Design of experiments ( DOE) and Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques useful for developing, improving and optimizing process and new products, as well as in the improvement of existing product designs. RSM can take unknown response function and approximate it by coded variables where these coded variables are usually defined to be dimensionless with zero mean and the same spread or standard deviation. Usually a low order polynomial in some relatively small region of the independent variable space is generated. The example presented above demonstrates that designs taken from the RSM paradigm can be used to good effect in a traditional agricultural setting and this point is further underscored by the work. And according to Hill and Hunter, RSM method was introduced by G.E.P. Box and K.B. Wilson in 1951. Box and Wilson suggested to use a first-degree polynomial model to approximate the response variable. They acknowledged that this model is only an approximation, not accurate, but such a model is easy to estimate and apply, even when little is known about the process. The resulti ng surfaces, usually linear or quadratic, are fitted to these points.

Often statistical methods such as design of experiments are used to determine where in the design space these points s hould be located in order to obtain best possible fit. In this paper we use linear polynomials to create the response surface. The creation of such response surface models to approximate detailed computer analysis codes is particularly appropriate in the preliminary design stages when comprehensive trade-offs of multiple performance and economic objectives is critical. In many cases, either a second-order model is used.

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Rice Destoner(LIANGGONG) intended to facilitate the removal of stones and other foreign particles from input grains by separating impurities on the basis of their densities. This machine performs based on the density difference by adjusting the aspiration system. Rice destoners can be used to segregate the granular products where the particles are approximately the same size but, differ in weight.

Rice destoner efficiently removes a small amount of heavy material from a larger quantity of light material. These are designed to have a long operational life and are installed with closed circuit dust aspiration systems and lighting systems to enable easy viewing of the components of the equipment.

Rice destoner features

The grain spreads evenly over the mesh screen resulting in it getting stratified and separated by the difference in specific weight through the screen vibrations and rising airflow

Dust and other light foreign materials are carried to the dust collecting unit with the air flow

Sorted grain / stone mixture that passed through the upper and lower screen dropdown to the resorting deck

Stone and other foreign materials of heavy specific weights are removed by the resorting screen

Advantages of rice destoner

Efficient & precise separation of stones and heavy material based on density difference

Provided with closed circuit dust aspiration system

Fitted with imported vibro motors for trouble free, long life and low noise operation

Separate collection of stones and dust particles through aspiration system

Sturdy, rigid and heavy duty construction

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Apart from rice milling, processing of rice bran for oil extraction is also an important agro processing activity for value addition, income and employment generation and make the entire production of rice a viable. Many of the rice processing units are of the traditional Rice Huller(LIANGGONG) type and are inefficient. Modern rice mills are having high capacity and are capital intensive, although efficient.The present model will go a long way in bridging the information gap.

Description of Rice Milling Operation:

Paddy in its raw form cannot be consumed by human beings. It needs to be suitably processed for obtaining rice. Rice milling is the process which helps in removal of hulls and barns from paddy grains to produce polished rice. Rice forms the basic primary processed product obtained from paddy and this is further processed for obtaining various secondary and tertiary products.

The basic rice milling processes consist of:

Process Definition

1. Pre Cleaning: Removing all impurities and unfilled grains from paddy

2. De-stoning: Separating small stones from paddy

3. Parboiling: Helps in improving the nutritional quality by gelatinization of starch inside the rice grain. It improves the milling recovery percent during de-shelling and polishing / whitening operation. Also It makes the rice insect-free for quite some years.

4. Husking: Removing husk from paddy

5. Husk Aspiration : Separating the husk from brown rice/ unhusked paddy

6. Paddy Separation : Separating the unhusked rice

7. Whitening or polishing

8. Grading and separation of white rice

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One: The use of Rice Whitener(LIANGGONG) machine, must butt good use of models. First switch off all switches and valve pull panels. When the rice machine is started, the lifting machine should first upgrade the rice to the lower hopper to ensure the continuous flow of rice in the hopper.

Two: Open brown rice switch, in the process must ensure that the part of brown rice does not stop, and then open the rice switch (powder regulator to the right) to ensure that all links continue to flow, so that the mill out of the rice will be very good. If cut off, it will result in a number of rice head, there will be a shell of rice out. The cause of no pressure at break.

Three: Every time you turn on the machine, you should pick up the rice head and pour it into the brown rice bin. When you see the rice husk, the rice will not be normal. The main reason is the cut off and no pressure.

Four: The use of rice whitener machine in summer, especially in the southern humid zone, to regularly clean the motor and equipment in the fly ash, can prevent the motor cooling, causing motor capacitor burned or led directly to electrical burn occurs.

Five: There is no elevator machine rice machine to ensure the continuous flow of rice in the warehouse, to ensure that the equipment and motor parts dust timely processing, to avoid the equipment, the motor can not be burned and burned.

After the above points, I believe we all need to pay attention to the use of fresh rice machine in the process has been understood and mastered the main points.

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The rice is passed through a number of different operations and machines from paddy to white rice is called multistage milling process. Removal of husk layer from the paddy by friction process is called de-husking (or) dehulling. The different types of Rice Huller(LIANGGONG) machines are steel huller, under runner disc sheller and rubber roll sheller. The steel huller and under runner disc sheller have very low milling efficiency and hulling efficiency . Economic values of the grains based upon yield of the grain and percentage of head rice yield.

The objective of rice milling system is to remove the husk and the bran layer to produce white rice. Rice milling can be undertaken at three levels. When the husk and bran layer is removed in one process and the white rice is directly produced from the paddy, it is called one step milling process. The husk and the bran layer is removed separately and the brown rice is produced as an intermediate product, it is called two step milling process.

The parameters that affect the rice breakage and rubber roll wear depends on the type of harvesting, drying temperature, drying methods, physical characteristics of paddy, husking characteristics, paddy moisture content, rubber roller speed, rubber roll pressure, paddy feed rate, fissures and rubber roll wear. So for polyurethane and food Quality Nitrile rubber compound has been developed to test the shelling efficiency and rice breakage. Fresh paddy contains 28% of moisture content and this leads to increase in rice breakage during rice milling. Temperature adopted for drying should be altered based on the level of moisture content. Each paddy has different kernel dimension and it leads to rice breakage during the husking operations.

Rice breakage depends on husking ratio, husking time and husking index. The optimum moisture content in rice milling is 12-14% w.b, rice breakage is low at this moisture content. Higher roller speed leads to increase in rice breakage and in turn roller operated at lower speed leads to unhusked rice. So the optimum roller speed for husking operation in rice milling is 2.9 m/s. Rice breakage is also based on the feed rate in the rubber roll huller. In friction process, crack is developed in the rice kernel and it leads to rice breakage. Rubber roll material wears due to the friction process of paddy de-husking. Rice breakage is also varied based on rubber roll hardness.

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Paddy Husker(LIANGGONG) machine is used for removing the husk from the paddy. It gives much better yield with lower rate of broken . Paddy husker machine gives much more production for the each pair of rubber rolls . Now you can enjoy the low cost of production with lower rate of broken.

Paddy husker machine has high automation and is equipped with first-class components of the world. Husk separation adopts traditional domestic vertical suction channel, thereby meeting the needs of middle and large rice milling plant. It is an ideal upgrade product for modern rice milling plant. Its unique feeding systems, coupled with very fine and minute control system, greatly enhance the efficiency of the de-husking process. It increases the life of rubber roll by 30%.

Characteristics of paddy husker machine:

1. Excellent performance, compact construction.

2. Automatically unengaged without paddy, whileif with paddy, rubber rollers engage automatically. Opening for feeding gate and pressure between rubber rollers are automatically controlled by pneumatic components.

3. Easy to operate and adjust. Pressure between rubber rollers can be adjusted directly by pressure valve, and feeding flow and air volume adjusted by adjustable handle.

4. Equipped with long shedding plate and high speed and compulsive feeding mechanism, super power of driven motor, it has high husking yield and big capacity.

5. Complete husk separation by adopting classic vertical suction channel, thus the rice contained in husk greatly less than that of overseas.

6. With timing belt or double-side V-belt, it runs steadily, and has less vibrating and low noise.

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The present invention relates to a Rice Polisher(LIANGGONG) (rice polishing section or rice washing section) for conducting preprocessing to produce so-called “pre-polished rice” (pre-polished processed rice, dried washed rice, or processed rice) and with which it is possible to readily cook rice by only adding water, without the need to wash rice (i.e., to polish rice) before cooking the rice, and that has good preservability. The present invention further relates to pre-polished rice producing apparatus (pre-polished rice processing apparatus) a pre-polished rice producing facility comprising the rice polisher, and to a leveling device for leveling grains supplied on a receiving surface of a receiving member.

When white rice (polished rice, raw material rice or raw material white rice) is washed in water by an ordinary method, water permeates the polished rice and the water content of the rice increases, whereby the rice becomes subject to mold growth or decomposition. Thus, pre-polished rice that can be handled in the same manner as ordinary polished rice cannot be obtained. Alternatively, when polished rice whose water content has been increased due to being polished in water is dried, the starch layer of the polished rice that has absorbed water and expanded shrinks upon being dried. Thus, when the polished white rice is dried, the surface of the starch layer of the polished white rice abruptly shrinks, whereby tension is created in the surface layer and the rice cracks. Polished rice that has sustained cracking absorbs a high volume of water during cooking, whereby the rice expands unevenly and a high volume of starch particle is released from the crack. It is well known that this results in rice having inferior taste.

However, according to this pre-polished rice producing apparatus, there is a problem in that a large amount of water must be used because water is needed for both the cleaning step and the rinsing step. Use of a large amount of water not only results in swelling water bills, but also means that a large amount of polluted water (polished-waste water, washed-waste water, discharge water or drain water) is discharged, whereby companies are obliged to use large and expensive water-purifying plants as stipulated by bylaws for the prevention of environmental pollution. Thus, this has become a big concern in the rice industry.

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Rice Grader(LIANGGONG) help group individual grains with others of near identical thickness. This type of device is also used to separate products such as beans as well as a variety of other grains. Slots or round holes on a screen allow grains of specific thicknesses to pass through into a collector.

Because it is a staple food for serving many generations and many centuries in the world, the need for its production and consumption is increasing day by day. According to the census of Food and Agriculture Organization of the United Nations (FAO), world’s total rice production has been increased from 570 million tonnes in 2002 to 720 million tonnes in 2012.

A rice destoner is a machine that removes stones and clods from soil ridges and moves them to the furrow so that the ridges are free from stones. This also helps when harvesting in wet conditions as the harvester can drive on a row of stones which helps improve traction.

Click Rice Huller to learn about more information.

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