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What is the working principle of a rice dryer

What is the working principle of a rice dryer

A rice dryer is a mechanical device used to dry rice. It uses heat and wind to dry the rice that is sent into the machine. What is the specific principle of a rice dryer? The rice dryer uses a special heat pump type drying heat! The fan provides a heat source for the rice dryer. The evaporator absorbs heat from the air outside, and then transfers it to a gas compressed into high temperature and pressure. This high temperature and pressure gas is then transferred to the condenser, releasing heat to dry the rice in the rice dryer. The heat source is carried by the refrigerant, which releases heat on the condenser. After measuring, it passes through the throttle valve and returns to the evaporator, which is then circulated in this order, Achieve uninterrupted drying operations.

2022-12-07

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Precautions for maintenance of circulating fan

Precautions for maintenance of circulating fan

Correct maintenance is an important guarantee for the safe and reliable operation of the circulating fan and for improving its service life. Therefore, when using tobacco baking circulation fans, it is necessary to pay sufficient attention. During the initial stage of impeller operation and during all regular inspections, whenever there is a chance, the impeller must be inspected for defects such as cracks, wear, and dust accumulation. Whenever possible, it is necessary to keep the impeller clean and regularly brush it with a wire brush to remove dust and rust deposits. As the operation time increases, these dust cannot uniformly adhere to the impeller, causing damage to the impeller balance and causing rotor vibration. Once the impeller is repaired, it needs to be dynamically balanced again. If conditions permit, a portable trial balancing instrument can be used to perform balancing on site. Before performing dynamic balancing, all fastening bolts must be checked for tightness. "Because the impeller has been operating in an unbalanced state for some time, these bolts may have become loose.". In addition to regularly checking the interior of the casing and intake chamber for serious wear and removing serious dust deposits, other special repairs are not required for these parts. Regularly check whether all fastening bolts are fastened. For fans with compression bolt parts, press the butterfly spring on the foot to the installation height specified in the drawing. The maintenance of the bearing department often checks the oil supply of the bearing lubricating oil. If there is oil leakage in the box, tighten the bolts on the end cover a bit. If this is not enough, you may have to replace it with a new sealing filler. The maintenance of other supporting equipment, including motors, electric actuators, instruments, and meters, is detailed in their respective operating instructions. These operating instructions are provided by various supporting manufacturers, and our manufacturer will provide these instructions to users in a random box. Repair and maintenance when the high-temperature circulating fan is out of use When the fan is out of use, when the ambient temperature is below 5 ℃, the residual water in the equipment and pipelines should be drained to avoid freezing damage to the equipment and pipelines. Maintenance of the flue cured tobacco circulating fan during long-term shutdown and storage. Coat the surfaces of bearings and other major components with anti rust oil to prevent corrosion. The rotor of the high-temperature circulating fan for tobacco baking should be manually moved for a half turn (i.e. 180 °) every half a month or so. Before moving, the shaft end should be marked so that the original uppermost point is located at the lowest point after moving the rotor.

2018-05-16

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Classification of fans

Classification of fans

Fans can be classified into several types according to the material used, such as iron shell fans (ordinary fans), fiberglass fans, plastic fans, aluminum fans, stainless steel fans, and so on Fans can be classified into centrifugal, axial, oblique (mixed flow), and cross flow types according to the direction of gas flow.

2018-05-16

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Maintenance method of drying kiln motor

Maintenance method of drying kiln motor

Drying kiln motors are also a type of motor, so their maintenance process is the same. The maintenance process for drying kiln motors is: cleaning the stator and rotor - replacing carbon brushes or other components - vacuum Class F pressure impregnation paint - drying - calibrating dynamic balance....

2018-05-16

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How to use the tobacco circulation fan?

How to use the tobacco circulation fan?

The tobacco baking circulating fan generally includes a motor, a transmission shaft, a bearing seat, and a fan blade. The output shaft of the motor is fixedly connected to the upper end of the transmission shaft through a coupling. The fan blade is fixed to the bottom end of the transmission shaft, and adopts a direct transmission method. The motor directly drives the transmission shaft to rotate. Therefore, the stability of transmission is good, and the bearings on the transmission shaft are not susceptible to wear. There are also diesel engines configured, which can be used to drive the fan to rotate in the event of a power outage, to avoid the inability to bake tobacco leaves normally due to power outages.

2018-05-16

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