The dryer is a device for treating the moisture of the material. The paddle dryer is popular in many industries for its high heat utilization and heat transfer and super self-cleaning ability. Today, the drying equipment manufacturer will bring you the paddle type. The relevant instructions of the dryer’s instruction manual are introduced.
First, the operating instructions of the paddle dryer
1, installation and commissioning
1.1 Before installation, check that the components are intact and clean the inside.
1.2 After installation, check whether the grease has been injected into the bearing housing before commissioning. Otherwise, it should be filled with appropriate amount of grease. Generally, use molybdenum disulfide compound calcium base grease or other high temperature resistant grease.
1.3 Before installing the rotary joint, carefully read the rotary joint “Instruction Manual” and install it correctly to prevent damage to the gasket.
1.4 Heating or cooling medium inlet pipe should be equipped with pressure gauge and voltage regulator. A valve must be installed in front of the inlet to prevent overpressure of the equipment. The temperature of the heating medium must not exceed the rated service temperature.
1.5 For the rotary joint of the shaft part, it should be noted that the surface within 200 mm of the joint part extending into the inner cavity should be smooth and non-porous, free from rust and slag, and can reach the heating (or cooling) medium. Sealing requirements and dimensions are suitable. The same type of rotating joints are installed, and the whole machine must be commissioned after the test pressure is not leaked.
1.6 Check and debug the gear drive or chain drive to meet the mechanical transmission requirements. Check the motor and electrical equipment. Touch the motor power switch, the motor and transmission parts should be free of jamming, and make sure that the spindle is turning correctly (the blade should be pointed forwards when the blade rotates).
1.7 Start the motor to make the equipment run at no load, the operation should be smooth, and no abnormal noise should appear. For the speed control device, the speed should be adjusted within the adjustable range. When accelerating, it should be carried out slowly to check whether the speed regulation meets the requirements. No more than 30 minutes of no-load operation.
1.8 Gradually heat or cool, observe the operation, and make the heat source or cold source reach the use parameters. Equipment with cooling protection must open the cooling water valve before steaming. Gradually add materials, observe and check the dry condition of the materials, and continuously adjust the feeding amount, heat (cold) source quantity, discharge amount and rotation speed according to the needs, and then put into normal operation after reaching the design requirements.
2, paddle dryer instructions
Discharge the condensate in the steam line, then close the stop valve of the paddle dryer, open the air switch of the electric control cabinet (the corresponding display is red), and start the circulation fan of each heating chamber.
When the temperature in the drying chamber reaches 145 °C, set the switch of the speed regulating motor controller to the “on” position, then turn the speed control knob clockwise to make the pointer to the desired position. At the same time adjust the tightness of the conveyor chain, and then start feeding the dryer, pay attention to the uniformity of the feed.
The steam supply shut-off valve is opened to heat the drying chamber. When the steam working pressure is 0.4~1.0Mpa, the excellent performance of the machine can be fully utilized. By adjusting the angles of the inlet and exhaust dampers, the humidity in the drying chamber is controlled so that the material is in a dry state.
2.1 Motor use and maintenance Refer to the respective service and maintenance instructions.
2.2 Turn on the power supply, paddle dryer, and listen to the abnormal sound; in the on-site debugging process, the steam pipeline must be kept open.
2.3 Since some parts of the parts are inevitably displaced during transportation, adjustments must be made before use to ensure the normal use of the dryer.
2.4 After turning on the power, the principle of the paddle dryer, see if the temperature control table shows room temperature (No, please check the connection)
2.5 Before turning on the drive motor, first turn the inverter to the 0 position (after adding the corresponding oil), then open the drive motor (pay attention to the direction), turn the inverter to make the machine run, and see if there is any abnormality. After turning the circle, increase the speed, the paddle dryer instruction, and make sure the operation is normal.
2.6 The heating medium and steam pressure during normal use of the equipment shall not exceed 0.5 MPa.
Second, the common faults and solutions in the use of paddle dryer
1, low output
The reason is: low steam pressure or water, stirring and mixing fruit difference, material running speed is low, the material level in the machine is not suitable, there is water in the blade or hollow shaft, the water content of the feeding material is too high, the heating surface is sticky Wall or scale, moisture is not discharged smoothly, condensed water is returned to the dryer, and the blade or jacket leaks.
Suggested treatment methods: whole steam pressure, discharge condensate, increase spindle rotation, increase spindle rotation or increase equipment inclination, adjust feeding amount or discharge height, repair or replace steam trap or increase steam pressure, adjust feeding Moisture rate or return material, adjust steam temperature or feedstock humidity, clean up fouling, check exhaust pipe and exhaust fan status, increase exhaust air volume, increase exhaust air temperature or increase air intake, repair, repair or Seal the crack.
2, the discharge moisture content is high
The reason is: the material residence time is short, the feed amount is too large or too wet.
Suggested treatment methods: reduce the number of spindle revolutions or reduce the equipment inclination, adjust the feed amount or feedstock humidity.
3, the rotary joint leaks
Cause: The gasket or dynamic seal is damaged.
Recommended treatment: Check and replace the gasket or dynamic seal.
4, the condensate is not clean
The reason is that the steam does not match the hydrophobic pressure, the trap is not properly selected, and the trap is damaged.
Suggested treatment: Adjust the steam pressure or trap pressure, re-select the trap, and replace the trap.
5, the rotary joint leaks
Cause: The gasket or dynamic seal is damaged.
Recommended treatment: Check and replace the gasket or dynamic seal.
6, other solutions
If the board system is a problem, it is a useful treatment to replace the damaged parts with the accessories of the new sludge dewatering equipment. However, this method does not apply to the following conditions: the parts are low; the new parts are damaged when removed; the original parts are damaged from the head, and the parts are replaced at regular intervals.
Always contact the manufacturer. If there is any problem with the sludge dewatering equipment, consult the after-sales personnel, analyze the possible causes, and consult the repair plan. The rolling accessories are refueled and maintained every month to ensure the normal operation of the sludge dewatering equipment. If the sludge dewatering equipment shows that the main electrical equipment is idling, it is necessary to close the power supply and open the equipment cover to see if it is blocked.
The above is the introduction to the use of the paddle dryer. The normal operation of the equipment is inseparable from the standard operating procedures. After purchasing the equipment, read the instruction manual in detail and pay attention to the precautions.
