Dryfree mainly sells dehydrator, solar dryers, heat pump dryer machines and solar+heat pump dryer.

Rice noodle heat pump drying equipment.

A brief introduction of rice noodle

Rice noodle, a characteristic snack of Han nationality, is a very popular food in southern China. Rice noodle is a kind of strip and filamentous rice product made from rice by soaking cooking and pressing instead of the powder material which is made by grinding rice as raw material. The rice noodle is flexible and elastic. It can't be boiled and fried easily. It can be cooked or fried with all kinds of dishes or soup materials. It is smooth and delicious. It is popular among consumers (especially southern consumers).

Brief introduction of Heat pump Dryer

Heat pump drying is a kind of drying technology which uses evaporator to cool and dry air and recover condensation heat from condenser. Under the same conditions, heat pump drying can save 20% ~ 50% energy. Has been used in wood, grain drying, food processing and textile industry. Heat pump for drying, processing, dehydration of garlic slices, ginger slices, high rehydration rate of products. The application of drying technology to the drying of Chinese medicinal materials can ensure the quality of dried products, and the color, appearance and active components of Chinese herbs can be protected properly in heat pump drying. Using heat pump to dry velvet antler, Huaishan, Beiqi, panax notoginseng, maca, etc. It can better maintain the original color, flavor, active ingredients and active substances. At the same time, the heat pump drying technology has the advantages of high efficiency and energy saving, low cost, no pollution of the environment, and can accurately and independently control the temperature, humidity and airflow velocity of the drying medium. This essay discusses the application of heat pump drying technology to the drying of rice noodle.

Principle of heat pump dryer

The high temperature heat pump dryer unit mainly consists of four parts: wing plateevaporator (outside machine), compressor, wing plate condenser (inner machine) and expansion valve. By allowing the working fluid to continuously complete the thermal cycle of evaporating (absorbing heat from the outdoor environment) and condensing (releasing heat in an indoor drying room),Thus, the heat in the external low temperature environment is transferred to the drying room, and the refrigerant circulates in the system under the action of the compressor. It completes the process of raising the temperature of the gas in the compressor (the temperature is up to 100 ℃, it enters the machine and releases heat to heat the air in the drying room, and at the same time it is cooled and converted into a liquid flow, when it moves to the outside machine,The liquid state is rapidly evaporated into gaseous state, and the temperature can be reduced to-20℃-30℃. The air around the heat absorber will transfer the heat to the refrigerant continuously. The high temperature heat pump dryer unit, like ordinary air conditioners and heat pump units, absorbs the energy in the evaporator in a low temperature environment, QA: it consumes part of the energy by itself. That is, the compressor consumes electricity QB: through the refrigerant circulating system in the condenser, the heat release QC(QC=QA+QB) is carried out, so the efficiency of the high temperature heat pump dryer unit is ( QB+QC)/QB, while the heating efficiency of other heating equipment is less than 1, so the high temperature heat pump dryer unit is heated.The efficiency is much higher than the efficiency of other heating equipment, It can be seen that using high temperature heat pump dryer as drying unit can save energy and reduce C O 2 and other pollutants emissions, to achieve the effect of energy conservation and emission reduction.


Rice noodle processing process

Many varieties of rice noodle, can be divided into row rice noodle, square rice noodle, corrugated rice noodle, silver wire rice noodle, wet rice noodle and dry rice noodle, and so on.Their production process is similar, generally process: rice - washing - soaking - grinding -steamed flour - pressed(extruded) - steamed again - cooling - drying - packaging - finished products.

Application Technology of Rice Noodle Dryer)

When the rice noodle is dried, the temperature should not be too high, 28-38 degrees Celsius is appropriate, the temperature is too high and the humidity in the initial drying room is higher, which will form stuffy cooking and affect the edible taste of rice noodle. Dry rice noodle can be baked in 4-6 hours.A dryfree 12HP dryer can dry 1000kg of rice noodle at one time. Dryfree rice noodle dryer uses medium and low temperature drying, built-in scientific drying curve program, intelligent control of temperature and humidity, drying rice noodle than the traditional sun drying rice noodle cleaner, more round shape, drying more uniform,Deeply favored by rice noodle processing manufacturers.The equipment operation is simple, practical, does not need to burn coal, burning boiler, save time and labor.

Advantages of Rice Noodle Dryer:

1.energy conservation:

Energy saving is the starting point and the main advantage of heat pump application.

2.Good quality of dry products:

Heat pump drying is a mild drying method, close to natural drying.The evaporation rate of surface moisture is close to that of internal moisture moving to the surface, so that the quality, color and grade of dried articles are good.

3.Drying parameters are easy to control and can be adjusted in a
wide range

In the process of heat pump drying, the temperature, humidity and circulation flow of circulating air can be controlled accurately and effectively.The range of temperature adjustment is -20 ℃ 100 ℃ (with auxiliary heating device), and the range of relative humidity adjustment is 15 ~ 80, which is suitable for drying thermosensitive materials.


Material drying requires not only high quality and low energy consumption, but also environmental friendliness.Based on the same evaluation criteria, heat pump effects on global warming are small compared withelectrically released Co2.Environmental friendliness is the advantage of heat pump drying.At present, the application of heat pump to reduce CO2 emissions is advocated in foreign

countries, and it will be applied further.

5.environmental benefit:

No pollution to the environment, created a clean and harmonious working environment and production environment, laid the foundation for the sustainable development of enterprises, for the future of enterprises and scientific and technological innovation and industrial structure adjustment, has carried on the powerful impetus.In line with man and nature, the law of coordinated economic


The use of heat pump drying technology marks a new direction and a new field for dehydration drying of agricultural products. It has a strong impact and challenge to the traditional ways of drying agricultural products and drying equipment.At the same time, the application of heat pump technology is in line with the national and local governments to promote energy conservation and emission reduction, low- carbon production and life, comply with the development of the times, it is irresistible, in both economic and social effects played a major role.It is a good example for enterprises to implement and promote the goal and action of sustainable development, which is persuasive and beneficial to the people.