The working principle of the disc continuous dryer

The wet material is continuously added to the first drying tray in the upper part of the dryer from the feeder, and the rake arm with the rake blade makes a rotary motion to make the rake blade continuously turn over the material. The material flows through the surface of the drying tray along the exponential spiral, and the material on the small drying tray is transferred to the outer edge, and falls to the outer edge of the large drying tray below, and the material moves inward on the large drying tray and falls into the next layer of small drying tray from the middle blanking port. The large and small drying trays are arranged alternately up and down, so that the material can flow continuously through the entire dryer.

The hollow drying tray is fed with heating medium, which is in the form of saturated steam, hot water, heat transfer oil and high-temperature molten salt, and the heating medium enters from one end of the drying tray and exits from the other end. The dried material falls from the last drying tray to the aggregate tray and is finally transferred to the discharge port by the rake blades. The moisture overflows from the material and is discharged by the moisture discharge port located on the top cover, and the moisture of the vacuum disc dryer is extracted by the vacuum port located on the top cover.

The dry material discharged from the bottom layer can be packed directly. By adding fin heater, solvent condenser, bag filter, pre-dryer, induced draft fan and other auxiliary equipment, it can improve its drying production capacity, dry paste paste and heat-sensitive materials, can easily ** solvent, and can be heated, cooled, calcined, sublimated, pyrolysis and reaction operations.

The material enters the dryer from the feed inlet, is continuously copied on the surface of the drying tray, and at the same time is dried by heat conduction from the heating medium. Heating mediums, such as saturated steam, hot water, heat transfer oil and high-temperature molten salt, are introduced into the drying tray to transfer heat to the material by heat conduction. The material moves on the drying plate to complete the heat and mass transfer process, the dried material is discharged at the discharge port at the bottom of the dryer, and the wet vapor escaping from the material is discharged into the atmosphere by the induced draft fan after passing through the dust collector.

This mode is characterized by the continuous work of the dryer, occupies a small area, due to the use of high-temperature heat conduction oil as a heat source, the use of heat transfer oil to transfer heat energy, so the drying intensity is large, the thermal efficiency is high, so that the energy consumption is greatly reduced; Moreover, the equipment works in a closed manner, with a good operating environment and no pollution to the environment.

The working principle of the drying equipment is to heat the material so that the moisture or other liquids inside it volatilize, so as to achieve the purpose of drying.

Drying equipment is a kind of equipment used to volatilize the water or other liquids in the material. It is widely used in chemical, pharmaceutical, food, building materials and other industries, and is one of the indispensable equipment in these industries. The working principle of the drying equipment is to heat the material through several servants, so that the moisture or other liquids inside it volatilize, so as to achieve the purpose of drying.

The dryer is compressed, and the pressure and temperature are increased at the same time; The high-pressure and high-temperature refrigerant vapor is pressed, and part of the liquid is then transported to the expansion valve, which throttles into a low-temperature and low-pressure liquid and enters the evaporator; In the evaporator, the low-temperature, low-pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes, the thermal efficiency is high, and the product is not polluted, but the drying capacity is limited by the heat transfer area of the metal wall, and the structure is more complex, and it is often operated under vacuum.

Classification of dryers

Conduction drying. It refers to placing the material on a heating plate, through which the material is heated so that the moisture or other liquids inside it volatilize. This drying method is suitable for some relatively small materials, such as powder, granules, etc.

The heating plate for conduction drying is usually composed of electric heating tubes or steam heating tubes, through which the heating plate is heated, thereby heating the material.

Convection drying. It refers to placing the material in the drying chamber, heating the air in the drying chamber to make it hot air, and then blowing the hot air to the material through the fan in the drying chamber, so as to heat the material and volatilize the moisture or other liquids inside. This drying method is suitable for some relatively large materials, such as plates, pipes, etc.

The drying chamber of convection drying is usually composed of a heater, a fan, a filter, etc., through which the air is heated, and then the hot air is blown onto the material through the fan.

The above content refers to Encyclopedia - Dryer.

Summary. Qinqin is happy to answer for you: vacuum disc dryer is an efficient conductive continuous drying equipment, its unique structure and working principle determine that it has high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, good operating environment and other characteristics.

There is no need to equip the cyclone dust collector necessary for spray drying, and hot air is not used as the heating medium, so there will be no product loss caused by poor separation of hot air and dust with exhaust gas entrainment. The new disc dryer is widely used in the drying operations of chemical, pharmaceutical, pesticide, food, feed, agricultural and sideline products processing and other industries.

Qinqin is happy to answer for you: vacuum disc type dumb limb dryer is an efficient conduction continuous drying equipment, its unique structure and working principle determine that it has the characteristics of high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. There is no need to equip the cyclone dust collector necessary for spray drying, and hot air is not used as the heating medium, so there will be no product loss caused by poor separation of hot air and dust with exhaust gas entrainment.

The new disc dryer is widely used in the drying operations of chemical, lead medicine, pesticides, food, feed, agricultural and sideline products processing and other industries.

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<> need to pay attention to the following matters when using a vacuum Panchang punch dryer:1Check that the machine is level to make sure the drying tray can rotate steadily.

2.Choose the appropriate drying temperature and time according to the characteristics of the material, and do not overheat. 3.

A single drying material can not exceed the maximum load of the cover tung machine to avoid overload of the machine.

The amount of water vapor in compressed air is determined by the temperature of the compressed air: while keeping the compressed air pressure basically constant, lowering the temperature of the compressed air reduces the amount of water vapor in the compressed air, while the excess water vapor condenses into a liquid. The freeze dryer uses this principle to dry compressed air using refrigeration technology.

Therefore, the refrigeration dryer has a refrigeration system. Schematic diagram of freeze dryer.

The refrigeration system of the freeze dryer belongs to compression refrigeration, which is composed of four basic components: refrigeration compressor, condenser, evaporator, and expansion valve. They are connected by pipes to form a closed system in which the refrigerant is constantly circulating, changing its state and exchanging heat with the compressed air and cooling medium. The refrigeration compressor sucks the low-pressure (low-temperature) refrigerant in the evaporator into the compressor cylinder, and the refrigerant vapor is compressed, and the pressure and temperature increase at the same time; The high-pressure and high-temperature refrigerant vapor is pressed to the condenser, and in the condenser, the refrigerant vapor with the higher temperature is exchanged with the cooling water or air with the lower temperature, and the heat of the refrigerant is taken away by the water or air and condensed, and the refrigerant vapor becomes liquid.

This part of the liquid is then transported to the expansion valve, through which it throttles into a low-temperature and low-pressure liquid and enters the evaporator; In the evaporator, the low-temperature and low-pressure refrigerant liquid absorbs the heat of the compressed air and vaporizes (commonly known as "evaporation"), and the compressed air is cooled and condenses a large amount of liquid water; The refrigerant vapor in the evaporator is sucked away by the compressor, so that the refrigerant goes through four processes of compression, condensation, throttling and evaporation in the system, thus completing a cycle. In the refrigeration system of the freeze dryer, the evaporator is the equipment that transports the cold energy, and the refrigerant absorbs the heat of the compressed air in it to achieve the purpose of dehydration and drying. The compressor is the heart and plays the role of inhaling, compressing, and transporting refrigerant vapor.

A condenser is a device that emits heat and transfers the heat absorbed in the evaporator to the cooling medium (such as water or air) along with the heat converted from the compressor input power. Expansion Valve The throttle valve plays a role in reducing the pressure of the refrigerant, controls and regulates the amount of refrigerant liquid flowing into the evaporator, and divides the system into two parts: the high pressure side and the low pressure side.

Electrically heated, air supply makes the heating uniform.

Changzhou Binda drying granulation equipment, specializing in the production of dryers,

Shijiazhuang University of Technology Chemical Equipment is a professional manufacturer of chemical equipment such as dryers, evaporators, filters, etc., and its research and development of industrial and technological brand disc continuous dryer is an efficient conductive continuous drying equipment. Its unique structure and working principle according to the top of it has the characteristics of high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, good operating environment, etc., Gongda brand disc continuous dryer is widely used in chemical, pharmaceutical, pesticide, food, dyes, feed, fertilizer, non-metallic minerals, smelting, agricultural and sideline products processing and other industries of drying operations.

Shijiazhuang Gongda Chemical Equipment Co., Ltd. production of industrial plate continuous dryer has won the national key new products, science and technology enterprise technology innovation, science and technology enterprise innovation award, China well-known trademark and other honors. Its key components have won a number of national utility model patents, the existing atmospheric, closed, vacuum three types, drying area of 4-180 square meters, a total of more than 300 types of products, and can provide a variety of auxiliary equipment, can meet the needs of users for drying of various materials.

Characteristics of the use of the disc dryer.

1) Easy to control and strong applicability1. Adjust the thickness of the material layer, the speed of the spindle, the number of rake arms, the type and size of the rake blade to make the drying process the best. 2. Each layer of drying tray can be separately connected with hot medium or cold medium to heat or cool the material, and the temperature control of the material is accurate and easy. 3. The residence time of the material can be accurately adjusted.

4. The material flow direction is single, there is no backmixing, uniform drying, stable quality, and no need to mix. (2) Simple and easy to operate1. The operation of the dryer is very simple. 2. After the feeding is stopped, the rake blade that conveys the material can quickly empty the material in the dryer.

3. Through the special large-size inspection door and sight glass, the equipment can be carefully cleaned and observed. (3) Low energy consumption 1, the material layer is very thin, the spindle speed is low, the power required by the material conveying system is small, and the power consumption is low. 2. Drying by conduction heat, high thermal efficiency and low energy consumption.

4) The operating environment is good, the solvent can be improved, and the dust emission meets the requirements 1, atmospheric pressure type: due to the low air flow rate in the equipment, and the humidity distribution in the equipment is high and low, it is difficult for the dust to float to the top of the equipment, so the exhaust gas discharged from the top moisture exhaust port almost does not contain dust. 2. Closed type:

Equipped with a solvent** device, it can easily ** organic solvents in humidity-carrying gases. For flammable, explosive, toxic and oxidizing materials, nitrogen can be used as a humidity-carrying gas for closed-circuit circulation to make it safe to operate. It is especially suitable for the drying of flammable, explosive and toxic materials.

3. Vacuum type: a disc dryer that operates in a vacuum state, especially suitable for the drying of heat-sensitive materials. (5) Easy installation, small footprint 1, the dryer as a whole factory, overall transportation, only need to be hoisted in place, installation and positioning is very easy.

2. Due to the layer-type arrangement and vertical installation of the drying tray, even if the drying area is large, the floor area is also very small.

Xuzhou Horsley Machinery, Danish technology, specializing in disc dryers.

I looked for it, and it was about this.

The material entering the hopper is evenly spread on the mesh belt by the feeder, and the 12 60 mesh stainless steel mesh is used on the mesh belt, which is dragged by the transmission device and moved in the dryer. The hot air of several units in the drying section of the belt dryer circulates independently, and part of the tail heat is distributed by the distributor and blows to the mesh belt into a jet stream, which enters the upper cavity after passing through the material, and the drying process is the process of hot air flow passing through the material layer to complete the heat and mass transfer. The upper cavity is connected to the inlet of the fan by the air duct, and a part of the gas is circulated, and a part of the gas with low temperature and high humidity content is discharged as exhaust gas through the dehumidification pipe, regulating valve and humidity exhaust fan.

In the lower circulation unit, the dry hot air drawn out by the circulating fan enters the upper cavity, is heated downward through the heat exchanger, passes through the material layer for heat energy transfer, and brings moisture into the lower cavity, and the lower cavity is connected with the inlet of the fan by the side air duct and the return air duct. Most of the gas circulation, part of the gas discharge, the upper and lower circulation units can be flexibly equipped according to the needs of users, and the number of units can be selected according to needs.