Drying oven manufacturers specialize in the production and sale of various types of blast drying ovenes and vacuum drying ovenes, supporting customers to customize drying ovenes, high product quality, perfect after-sales service
According to the different drying materials, the drying ovenes produced by our company are mainly divided into two categories: electric blast drying oven and vacuum drying oven. drying oven equipment has been widely used in chemical, electronic communications, plastics, cables, plating, hardware , Automotive, optoelectronic, rubber products, mold, spraying, printing, medical, aerospace and colleges and universities. The huge market demand makes the types of drying ovenes diversified, and the structure and quality of products are not the same. In order to make people understand the drying ovenes more clearly, the drying oven manufacturer ZZKD will give you a detailed introduction:
Blast drying oven
Our company mainly produces DHG series blast drying ovens, which are divided into desktop blast drying ovens and vertical blast drying ovens. The desktop blast drying oven refers to the box and the auxiliary box (control panel) are distributed left and right, the air ducts are located on the left and right sides, and the wind forms a degree of convection in the working room. The body is distributed high and low, and the wind forms vertical convection in the working room. The capacity of the optional drying oven is 40L, 80L, 136L, 220L, 420L, 620L, and 1000L. The universal voltage is 220V (110V / 60Hz can be custormized), all of which are made of 304 stainless steel. The average heating efficiency of the air drying oven is generally on average. 3 ~ 5 ℃ / min, heating up fast at high temperature, slowing down at low temperature, fast heating up in summer and slow heating up in winter, you can add heating efficiency by increasing heating power. However, the heating power of the high-temperature oven increases, and the temperature overshoot at the constant temperature will also increase.
The blast drying oven is also called a constant temperature oven. It is an indispensable testing equipment in the fields of aviation, automotive, home appliances, scientific research and other fields. It is used to test and determine whether the parameters and performance of electrical, electronic, and other products and materials subjected to high temperature tests after temperature changes can still meet predetermined requirements in order to For product design, identification and factory inspection.
The blast drying oven is mainly composed of sheet metal box, refrigeration system, heating system, humidification system, air circulation system and control system.
Classification of main ovens:
Shape characteristics: two types of horizontal blast drying oven and vertical drying oven:
Temperature range: low temperature blast drying oven: below 100 ℃, generally used for aging of electrical products, slow drying of common materials, and drying of some food materials, plastics and other products.
Normal temperature blast drying oven: 100-250 ℃, this is a common temperature for drying the moisture, coating curing, heating, heating and heat preservation of most materials.
High temperature blast drying oven: 260-400 ℃, special materials for high temperature drying, heating installation of workpieces, high temperature test of materials, reaction treatment of chemical raw materials, etc.
Ultra-high temperature blast drying oven: 410-600 ℃, higher working temperature, workpiece heat treatment, high-temperature drying of special materials, high-temperature test of materials, etc.
Air supply method: The air supply method of the blast drying oven is divided into horizontal air supply and vertical air supply.
1. Horizontal air supply: suitable for objects to be placed in the tray for baking; hot air for water supply is blown from both sides of the studio, so objects that can be bathed in the tray! The baking effect will be very good. On the contrary, it is not suitable to use the vertical air supply for the objects baked in the tray. The vertical air supply hot air is blown from top to bottom. It will block the hot air, so that the hot air will not bathe the lower layers. The corresponding baking effect It will be bad!
2. Vertical air supply: The blast drying oven is suitable for baking objects placed on the grid. The vertical air supply hot air is blown from top to bottom. Since it is a grid, the upper and lower circulation will be very good, so that the hot air can be used. Bathe completely on objects!
Of course, the objects placed on the grid can also be supplied with horizontal air, depending on the characteristics of the objects themselves.
Precautions for using electric blast drying oven
1. A person in charge must be responsible for using the electric blast drying oven instrument. After the equipment is used, the external power supply should be cut off to avoid accidents.2. When placing samples in the working room of the electric heating blast drying oven, it should not be too dense, so as not to affect the normal flow of air in the working room. There must be a gap of 10-20mm between each item, and it must be placed symmetrically. The items on each shelf For staggered placement, the distance between the bottom shelf and the bottom of the studio must be greater than 100mm.
3. A certain space should be left around the equipment to facilitate heat dissipation and operation and maintenance of the equipment.
4. Do not disassemble the electrical components and other (parts) of the equipment at will, so as to avoid damage to the electrical control circuit and cause human failure of the equipment to affect its performance.
5. When storing and using the equipment, there is no flammable, explosive and corrosive substances around.
6. Do not put flammable, explosive and volatile materials into the equipment for drying.
Vacuum drying oven:
The vacuum drying oven produced by our company is mainly DZF series. The main capacity is 8L, 25L, 55L, 90L, 430L, etc. It needs to be used together with the rotary vane vacuum pump. The universal voltage is 220V (110V / 60Hz can be custormized), temperature The categories are: RT + 0 ~ 250 ℃, RT + 0 ~ 300 ℃.
The vacuum drying oven is specially designed for drying heat-sensitive, easily decomposed and easily oxidized substances. It can maintain a certain degree of vacuum in the working room and can be filled with inert gas, especially for some complex components. Fast drying, temperature setting, display and control using intelligent digital temperature regulator. It is widely used in biochemical, chemical and pharmaceutical, medical and health, agricultural scientific research, environmental protection and other research and application fields, for powder drying, baking and disinfection and sterilization of various glass containers.
The shell of the electric vacuum drying oven is stamped, folded and welded. The surface of the shell is treated with high-strength electrostatic spray coating, and the paint film is smooth and firm. The working room is made of carbon steel plate or stainless steel plate and welded, and insulation cotton is filled between the working room and the shell. Inside the studio is a test shelf for various test items. Mica heaters are installed around the outside wall of the work room. The door seal is sealed with a silicone rubber strip, and a sight glass is provided on the door for observation. The evacuation and inflation of the electric heating vacuum drying oven are controlled by solenoid valves. The electrical box is on the left or lower part of the box. The front panel of the electrical box is equipped with a vacuum gauge, temperature control instruments and control switches. The electrical box contains electrical components.
Operating procedures
1. Put the material evenly on the sample rack in the vacuum drying oven and push it into the drying oven2. Close the box door, the air release valve, and bolts on the box door, which can make the door and the silicone seal tightly combined.
3. Connect the vacuum pump to the vacuum valve, open the vacuum valve, and evacuate
4. According to the performance of the vacuum pump, the limit value of the vacuum pump when the pressure gauge is pumped shall prevail
5. After vacuuming, close the vacuum valve first. If the vacuum valve is not closed tightly, please replace it, and then turn off or remove the vacuum pump power. (Prevent the phenomenon of back suction)
6. The drying cycle of the materials of the firm is observed at regular intervals, and the changes in the calendar, temperature, and cabinet are handled. If the pressure gauge index drops, there may be air leakage, and you can perform air extraction again.
7. After drying is completed, first open the air release valve to release the gas inside, then open the vacuum drying oven door and take out the material.
Vacuum pumps for vacuum ovens-maintenance
1. Check the oil level position frequently. If it does not meet the requirements, adjust it to meet the requirements. When the vacuum pump is running, the oil level is to the center of the oil mark.
2. Frequently check the oil quality and find that the oil has deteriorated and replace it with new oil in time to ensure that the vacuum pump works normally.
3. The oil change period is considered according to the actual conditions of use and whether it can meet the performance requirements, which is determined by the user. Generally, when a new vacuum pump is used to remove clean and dry gas, it is recommended to change the oil once every 100 hours of operation. After the ferrous metal powder is not seen in the oil, the oil change period can be appropriately extended in the future.
4. In general, the vacuum pump should be repaired after 2000 hours of work, check the ageing of the rubber seal, check whether the exhaust valve disc is cracked, and clean up the dirt deposited on the valve disc and exhaust valve seat. Clean the parts inside the vacuum pump cavity, such as rotor, rotor, spring, etc. It is usually washed with gasoline and dried. After cleaning the rubber parts, wipe them with a dry cloth. Handle with care when cleaning and assembling.
5. Conditionally clean the pipe as well to ensure that the pipeline is unobstructed.
6. Trial operation should be carried out after reassembly. Generally, it must be run for 2 hours with no oil and two oil changes, because a certain amount of volatile matter will be left in the vacuum pump during cleaning. After the operation is normal, put it back into normal work.
7, check the vacuum pump pipeline and joints for looseness. Turn the vacuum pump by hand to see if the vacuum pump is flexible.
8. Add bearing lubrication oil to the bearing body. Observe that the oil level should be at the center line of the oil mark, and the lubricant should be replaced or replenished in time.
9. Unscrew the water diversion screw plug of the vacuum pump pump body, and fill the water diversion (or slurry).
10. Close the gate valve, outlet pressure gauge and inlet vacuum gauge of the outlet pipe.
11. Jog the motor and see if the motor turns correctly.
12. Start the motor. When the vacuum pump is running normally, open the outlet pressure gauge and the inlet vacuum pump. After the proper pressure is displayed, gradually open the gate valve and check the load of the motor.
13. Try to control the flow and lift of the vacuum pump within the range indicated on the label to ensure that the vacuum pump runs at the highest efficiency point in order to obtain the maximum energy saving effect.
14. During the operation of the vacuum pump, the bearing temperature cannot exceed 35C and the maximum temperature must not exceed 80C.
15. If you find any abnormal sound in the vacuum pump, stop it immediately to check the cause.
16. When the vacuum pump is to be stopped, first close the gate valve and pressure gauge, and then stop the motor.
17. In the first month of the vacuum pump, the lubricant is changed after 100 hours and every 500 hours thereafter.
18. Regularly adjust the packing gland to ensure that the drip in the stuffing room is normal (it is better to leak out).
19. Regularly check the wear of the shaft sleeve, and it should be replaced in time after heavy wear.
20. When the vacuum pump is used in the cold winter season, after stopping, the drain plug on the lower part of the pump needs to be unscrewed to clear the medium. Prevent frost cracking.
21. The vacuum pump has been stopped for a long time. It is necessary to disassemble the pump completely, wipe off the moisture, coat the rotating parts and joints with grease, and keep it properly.
Difference between vacuum drying oven and blast drying oven:
To dry the dried materials, it is nothing more than to achieve the purpose of drying by direct heating, vacuum vacuum dehumidification and other methods. However, what is the difference between a vacuum oven and a blast oven?Through direct heating, of course, there is also a blast exhaust method, which is to heat the moisture, solvent, or volatile component molecules in the material to make its molecules move quickly and detach from the dry material to gradually obtain the material. dry. Its drying speed can be fast and the drying temperature can be very high.
Especially in the blast drying oven, under the action of the fan, the volatile molecules that are volatilized from the surface of the material are quickly taken away by air exchange, so as to achieve the effect of quickly drying the material.
The vacuum drying oven is a vacuum pump that draws the space where the dried materials are located to a negative pressure, which is the so-called vacuum state. We know that in the vacuum state or low pressure state, the boiling point of water, solvent and other volatile components in the material is reduced, so that at a lower temperature state, it can escape from the surface of the material particles and be pumped away by the vacuum pump. It is mainly used for materials that are oxidized, polymerized and other chemical reactions occur at high temperatures. Of course, it also has the dual effect of heating to accelerate the volatilization of moisture, solvents and volatile components and thus to escape from the surface of the material.
In summary, the difference between the two applications of the drying oven is the stability of the chemical properties of the object of the user's dried material and the requirements of the physical deformation of the dried material.
For more information about the drying oven and to purchase a drying oven, please contact us. We will provide you with the best quality products and the most suitable prices. Contact Tel:
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