Method for energy saving and consumption reduction by centrifugal spray dryer

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Centrifugal spray dryer of Changzhou Uniform Drying Equipment Co., Ltd. is one of the most popular drying equipments in the industry. It is a special drying equipment suitable for drying liquids such as emulsions, suspensions, pastes and solutions. High-speed centrifugal spray dryers are suitable for a wide range of applications. It can be said that it is a dryer suitable for processing solutions, suspensions or mud-like materials. The centrifugal spray dryer has a very good drying effect and high efficiency. The product is in the form of a uniform powder and does not require an increase in the pulverization process. At present, the market share of spray dryers in the chemical, light industry and food industries is very high.
In polymers and resins; dyes, pigments; ceramics, glass; rust removers, insecticides; carbohydrates, dairy products; detergents and surface actives; fertilizers; organic compounds, inorganic compounds liquid materials The performance of the dry, especially outstanding. The high-speed centrifugal spray dryer material completes the drying process in a short time, is suitable for the drying of heat-sensitive materials, and can maintain the color, fragrance and taste of the materials. The production process is simplified, the operation and control are convenient, and it is suitable for continuous control of production. The hot air enters the dryer uniformly in a spiral shape. The liquid is pumped from the liquid tank through the filter to the centrifugal atomizer at the top of the spray dryer, so that the liquid is sprayed into tiny droplets, and the liquid and hot air are in parallel contact, and the water evaporates rapidly. Drying into finished products in a very short time. The finished product is discharged from the bottom of the spray dryer and the cyclone, and the exhaust gas is extracted by the fan.
For the energy consumption problem, we can observe his production process. It is not difficult to see his problem. From the source, slowly solve the optimization and solve the problem fundamentally, such as using the heat exchanger to make the higher temperature exhaust gas into the process. The low temperature air contact of the gas is intended to increase the temperature of the intake air. In this way, the heat in the exhaust gas can be fully utilized, thereby reducing the amount of heat transfer oil used, thereby reducing the production cost. This is also one of the possible ways. Uniform Drying Equipment Company introduces three common methods to save energy and reduce consumption of centrifugal spray dryers.
1. Increase the temperature of the hot air into the tower:
Under the condition that the temperature of the tower is constant, the higher the inlet temperature of the hot air (also known as the inlet air temperature), the higher the total heat brought in, and the more heat per unit mass of hot air transferred to the mud droplets, the unit hot air The more moisture that is evaporated. In the case of constant production capacity, the required hot air volume is reduced (ie, the heat taken away from the tower when the hot air is removed), the heat consumption of the centrifugal spray dryer is reduced, and the utilization rate and thermal efficiency of the hot air are improved. However, the temperature of the hot air entering the tower should not be too high (not exceeding 600 °C). If the temperature is too high, the top wind splitter will be burned out.
2 , reduce the hot air out of the tower temperature:
When the temperature of the hot air entering the tower is constant, the lower the temperature of the hot air outlet tower, the larger the temperature difference between the inlet and outlet towers, and the greater the heat energy that the hot air transfers to the mud for drying, so the hot air utilization rate is higher. However, the exhaust air temperature should not be too low. When the temperature is lower than 75 °C, the powder is too wet, which affects normal drying.
3. Recycling of hot air (exhaust gas) from the tower:
After the ceramic slurry is spray-dried and powdered, if the hot air of the tower is directly discharged into the atmosphere, this part of the heat loss will be considerable (about 10% to 20% of the energy consumption of the milling process). Therefore, this part of the residual heat should be fully utilized, and the Shangyu Talent Network can recycle the hot air from the tower to the preheating and drying process. In addition to direct recycling, the tower hot air can also be stored or exchanged for reuse by using a heat exchanger.

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