The hollow blade dryer is a low-speed agitating dryer that allows the wet material to be in contact with the heat carrier and the hot surface under the agitation of the blade to achieve the purpose of drying, and can be classified into hot air type and conductive type. Two structures. The installation of the equipment has a very important impact on the later use and maintenance. Let’s take a look!
First, the installation environment, equipment quality, need consumables testing
1. Read the instructions for the main unit and auxiliary machine and related documents carefully before installation to develop a detailed installation plan. Before installation, check the number and integrity of all equipments one by one according to the packing list. Check for foreign matter inside and outside the equipment.
2. Inspect the strength, size, elevation, flatness, anchor bolt holes, etc. of each foundation to meet the design requirements. Clean or purge the base surface and bolts to the buried holes to remove debris, grease and ash.
3. Three-phase four-wire system 380V, 50Hz power supply, voltage fluctuations can not exceed 10%.
4. The air humidity is not more than 95%.
5. Electrical appliances and dryers must be effectively grounded.
6. It is best to use heat preservation for steam pipes and drying machines to avoid accidents such as burns.
7. The humidity of the installation environment should be suitable and not too humid to avoid the short circuit of the electrical appliance and the rust of the outer casing.
8. Not easy to install in the wood chips, dusty places such as the grinder, blocking the radiator.
9. Do not install in a place with or with items to avoid accidents.
Second, hollow blade dryer installation method
1. Hollow paddle dryer mainframe installation
The main unit is tilted at a certain angle according to the design requirements, or installed horizontally. Tighten the anchor bolts after installation.
2. Installation of auxiliary equipment for hollow blade dryer
a. Install parts and accessories that are shipped separately at the factory according to the instruction manual or other indicative documents.
b. When installing the adapter, you should carefully read the “Rotary Connector Instruction Manual” to prevent the gasket from being damaged.
3. Hollow blade dryer mud pump installation
a. Check the pump and motor to verify that there are no injuries during the transportation and loading and unloading process.
b. Prepare tools and lifting equipment, and review the basics of the machine according to the diagram.
c. The whole set of pump bottoms is equipped with motors. When leveling the base, the pump and motor can be removed.
d. Place the base in the basics, prepare to fill the concrete after leveling, level the anchor bolts after leveling, and fill the anchor bolts with concrete.
e. Place the steel ruler on the coupling. It is necessary to measure the upper, lower, front and rear, and check whether the axial line of the pump and the motor can coincide.
f. After the concrete of the anchor bolt to be fixed is completely dry, tighten the nut of the anchor bolt, and then check the degree of the whole pump set. It is slightly uneven and can be leveled by wedge iron.
g. According to the water absorption and outlet pipelines, when the pipeline is combined with the pump, it should be noted that the component and pressure of the pipeline should not be added to the pump to avoid the deformation of the pump.
Third, the hollow blade dryer installation precautions
1. The steam trap is generally purchased by the customer. It should be properly selected according to the process requirements. The displacement and drainage pressure are suitable. The drainage is thorough and has the function of discharging non-condensable gas. The trap should be installed at the lowest point of the equipment and the line should be provided with a bypass valve. If the trap is connected to the water storage tank or directly to the boiler room, a check valve should be installed behind the trap.
2. On the pipe network of steam inlet, pressure regulating valve, pressure gauge and safety valve should be installed to limit the maximum steam pressure to avoid accidental damage to the machine.
3. Ensure that the fixing bolts of the base are not loose and the springs are tightly connected. The control of the computer board, the wind wheel and the heat exchanger have good flexibility.
Fourth, hollow blade dryer dryer debugging method
1. After installation, check whether the grease has been injected into the bearing housing before commissioning. Otherwise, the appropriate amount of grease should be added. Generally, the molybdenum disulfide compound calcium base grease or other high temperature resistant grease is used.
2. Check and debug the gear drive or chain drive to meet the mechanical transmission requirements.
3. A pressure gauge and a voltage regulator should be installed on the inlet or outlet of the heating or cooling medium. A safety 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.
4. Conduct safety inspections on electric motors and electrical appliances. 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).
5. For the rotary joint with single-end configuration at the end of the shaft, it should be noted that the surface within 200 mm of the end of the nozzle extending into the inner cavity should be smooth and non-porous, free from rust and slag, and can be heated (or Cooling) The sealing requirements of the media are of a suitable size. As with the double-end installation of the rotary joint, the machine must be tested without leaking.
6. Start the motor to make the equipment run at no load, the operation should be stable, and no abnormal noise should appear. For speed control devices, the speed should be adjusted within the adjustable range. When accelerating, the speed should be slow to check whether the speed regulation characteristics meet the requirements. No more than 30 minutes of no-load operation.
7. 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.
8. 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.
