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    • ZPD series vacuum rake dryer
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    ZPD series vacuum rake dryer

    • ZPD series vacuum rake dryer
    Details
    1、 Introduction
    The ZPD vacuum rake dryer is a horizontal intermittent conduction drying equipment for easy oxidation
    Drying and processing of easily broken, heat sensitive powder like, slurry like, and paste like materials, such as pigments and fuels
    And intermediates, plastics, resins, inorganic salts, pharmaceuticals, and clay.This machine utilizes the rake blade on the central shaft to rotate in both positive and negative directions at regular intervals, and the material follows the rake blade forward and backward
    Move to both sides by rotating in the opposite direction, and converge from both sides to the center by rotating in the opposite direction. Due to the continuous stirring of the rake leaves When mixed, when the material comes into contact with the cylinder wall, the surface constantly updates and is indirectly heated by steam, causing the material to The internal moisture continuously vaporizes and is promptly extracted by a vacuum pump. Given that the operating vacuum is as high as 400-700mmHg, the boiling point of moisture decreases, and the surface moisture vapor pressure of the material is much greater than the moisture in the evaporation space inside the machine
    The partial vapor pressure is conducive to the evaporation of internal moisture, promoting drying and achieving the drying goal. root
    According to the product characteristics and requirements, after a certain drying time, the dried finished product is discharged from the quick opening at the bottom of the cylinder,Its moisture content can usually reach 0.1% to 0.05% (wet).
    2、 Main technical parameters
    Model: ZPD 4000
    Working volume: ≤ 2400 L
    Power: 15 Kw
    Cylinder size: Ф 1350 X2800 mm
    Interlayer pressure: ≤ 0.5Mpa steam
    Pressure inside the cylinder: -0.096 Mpa
    Spindle speed: 10 r/min
    3、 Usage and Maintenance
    1. Installation
    1) The equipment is in place according to the drawings and on-site requirements, and it is allowed to use pad iron and 200 mesh fine stone bricks to plug the equipment and
    Ensure equipment level and concentricity between foundations.
    2) Clean the reducer before installation, add new oil for lubrication as required, and only after passing the single machine test run acceptance can it be used
    Can be installed in place.
    3) Install all inlet and outlet pipes, valves, and connections between the heating, capture, and vacuum condensation systems and equipment
    Instruments and electrical appliances, as well as system pressure and air tightness tests, should be leak free.
    2. Start and Run
    1) Before starting, check the oil level and lubrication points of the motor, electrical appliances, and reducer, and check all tightness
    Firmware, manual turning, rotate the rake blade shaft forward and backward for one cycle, and it should be flexible and free from jamming and friction,
    Then install the coupling and check if the instruments, valves, etc. are installed correctly.
    2) After preparation, start the dryer motor, open the upper feeding port, and add the material to the equipment,
    The loading capacity is 60% of the inner cylinder volume, and then close the lid tightly to add the material port.
    3) Open the steam inlet valve and non condensable gas discharge valve, and close the non condensable gas after the steam emerges
    Discharge valve, open the condensate outlet shortcut valve at the same time, drain the condensate, and then close the shortcut valve,
    Open the inlet valve of the steam trap and record the steam pressure, which should not exceed 0.5Mpa.
    4) Synchronize with Article 3), start the vacuum pump, open the cooling water valves at the inlet and outlet of the condenser, and promptly adjust the equipment
    The internal vaporized moisture is condensed and discharged, ensuring that the vacuum pump can maintain a high vacuum degree, which is beneficial for drying
    The process is proceeding normally.
    5) To ensure the normal operation of the system, dry dust collection such as wire mesh should be installed at the upper outlet of the dryer
    The device captures the materials taken away during vacuum extraction and the condensed moisture. The wet separator only enters one
    Step by step, capture the material and condensed moisture. The above are all equipped by the user according to the process.

    6) The drying time of wet materials should depend on the product properties and drying requirements, as well as the degree of vacuum during operation

    Depending on the heating temperature. In the later stage of drying, the steam valve can be turned down or cooling water can be introduced.

    7) When the product requirements are met, close the steam inlet valve, cut off the vacuum pump system, and open the relief valve (true

    Set a bypass in the empty pipeline and open the bottom discharge port. Wait until the product inside the cylinder is discharged before closing it
    Dryer power supply.
    8) During operation, regularly check the vacuum level in electrical appliances, instruments, valves, and equipment, and check all lubrication
    Timely replenish and regularly replace lubricating grease at sliding points and oil levels.
    3. Precautions
    1) Before installing, operating, and maintaining this machine, it is important to read this manual and the general drawing in advance.
    Personnel who are not familiar with this equipment are strictly prohibited from starting or operating at will, and overloading is strictly prohibited. Prohibit jacket overpressure(≤ 0.5Mpa). The steam inlet should be equipped with an inlet pressure reducing valve to stabilize the steam pressure. Must not exceedDesign pressure; Install steam traps and bypass control valves at the steam outlet; When heating with steam, it should be turned onShortcut valve to allow a portion of the cooling water to be discharged in advance; After draining the condensate, close the bypass valve again to allowOperate the steam trap while slowly opening the steam valve; When cooling with cooling water, open the bypass valve firstAllow the waste steam to drain freely and then pass in cooling water, while closing the valve in front of the steam trap.
    2) During operation, it is strictly prohibited to mix hard debris into the equipment to avoid damaging the rake blades and equipment.
    3) During operation, due to full consideration of the expansion and contraction of the main cylinder due to heating (cooling), the driven end foot bolts are tightened Release and fix the bolt to allow it to freely retract and retract.
    4) During the maintenance period, it is necessary to hang signs and assign personnel for supervision to ensure safety.
    5) To ensure vacuum, it is necessary to regularly maintain and repair the vacuum device and inspect the separation system.
    + WeChat number:WEIXINHAOMA

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    午夜理论片日本中文在线
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