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China factory - Changzhou Su Li drying equipment Co., Ltd.

Changzhou Su Li drying equipment Co., Ltd.

  • China,Changzhou
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China Vacuum Rake Dryer Suitable For Chemical, Sludge And Other Industries
China Vacuum Rake Dryer Suitable For Chemical, Sludge And Other Industries

  1. China Vacuum Rake Dryer Suitable For Chemical, Sludge And Other Industries
  2. China Vacuum Rake Dryer Suitable For Chemical, Sludge And Other Industries

Vacuum Rake Dryer Suitable For Chemical, Sludge And Other Industries

  1. MOQ： 1 set
  2. Price： Quotation based on requirements
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Model ZPG
Payment Terms L/C, T/T
Packaging Details Important components placed in wooden crates
Material Stainless steel, carbon steel
Scope of application Chemical, sludge and other industries
Model Number ZPG
Certification ISO9001
Brand Name suli
Place of Origin China

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  1. Product Details
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Product Specification

Model ZPG Payment Terms L/C, T/T
Packaging Details Important components placed in wooden crates Material Stainless steel, carbon steel
Scope of application Chemical, sludge and other industries Model Number ZPG
Certification ISO9001 Brand Name suli
Place of Origin China
High Light Vacuum Rake Dryer for chemical industries ，Vacuum Rake Dryer for sludge drying ，industrial Vacuum Rake Dryer
Vacuum Rake Dryer for Chemical, Sludge and Industrial Applications
The vacuum rake dryer is a horizontal, indirect heat transfer, intermittent vacuum drying system. It operates by indirectly heating materials through a jacket/hollow shaft using heat mediums like steam, heat transfer oil, or hot water. Under negative pressure vacuum, built-in rake teeth agitate the material, enabling rapid vaporization of moisture or solvents at low temperatures, which are then removed by the vacuum system.
Vacuum Rake Dryer industrial equipment diagram
Core Structure and Working Principle
Sealed Shell and Jacket: Horizontal cylindrical construction with outer heating jacket (half-pipe or hollow paddle designs) operating under negative pressure vacuum.
Rake Teeth and Stirring Shaft: Forward and reverse rotation drive system where stirring shaft moves rake teeth alternately. Forward rotation pushes material to sides; reverse rotation gathers material toward center, ensuring uniform heating and preventing coking. Irregularly shaped rake teeth combine pushing and crushing functions, with some models featuring internal crushing rods to break up clumps during drying.
Condensation and Vacuum System: Vaporized solvents pass through filters/dust collectors and are recovered in condensers, while non-condensable gases are removed by vacuum pumps.
Technology Advantages and Limitations
Advantages:
  • Low Temperature High Efficiency: Reduced solvent boiling point under vacuum makes it ideal for heat-sensitive materials
  • High Solvent Recovery Rate: Fully enclosed system with condensers achieves over 90% solvent recovery
  • Suitable for High Viscosity/Paste Materials: Strong stirring prevents wall sticking and localized overheating
  • Intrinsically Safe: Low-oxygen negative pressure environment suitable for flammable, explosive, and toxic materials
Limitations:
  • Intermittent Production: Batch processing for feeding, drying, and discharging limits continuity
  • Mechanical Wear: Shear wear on granular materials unsuitable for maintaining crystalline structures
  • Complex Structure: Vacuum shaft seals require regular maintenance to prevent leakage
  • Complex Cleaning: Numerous internal mechanical parts increase cleaning costs during product switching
Key Selection and Design Parameters
Heat Transfer Area and Filling Ratio:
Filling coefficient typically controlled between 30-50%. Excessive filling affects evaporation space and stirring efficiency, while insufficient filling reduces heat transfer efficiency.
Heating Medium Selection:
Medium Type Temperature Range Application
Hot Water/Circulation Below 80°C Extremely heat-sensitive materials
Saturated Steam 0.2-0.6 MPa (120°C-160°C) Most common high-efficiency medium
Heat Transfer Oil 150°C-250°C High-boiling-point solvent removal
Shaft Seal Type (Leak Prevention):
Packaging seals are low-cost but prone to leakage for general materials. Double-end mechanical seals with gas/liquid flushing are standard for high vacuum, toxic, or corrosive solvent applications.
Discharge Valve Selection:
Use vacuum pneumatic ball valves or plunger valves with flush discharge port designs ("dead-angle-free valves") to prevent material accumulation before drying.
Common Faults and Maintenance Points
Vacuum Degree Decrease:
Caused by mechanical seal wear, aging discharge valve/manhole cover seals, or poor condenser cooling leading to incomplete solvent condensation.
Main Shaft Noise or Seizure:
Results from increased resistance during material binder phase or rake teeth colliding with inner walls. Requires inspection of reducer and drive chain.
Dust Entering Vacuum Pump:
Caused by damaged built-in bag filters or titanium filter elements at cylinder top, or malfunctioning backflushing systems.
Vacuum Rake Dryer operational components and maintenance details

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

Graphite Plugged Bushings

 from Quality China Factory

  • Business Type:

    Manufacturer,Seller

  • Year Established:

    2004

  • Employee Number:

    150~300

  • Ecer Certification：

    Verified Supplier

Changzhou Suli Drying Equipment Co., Ltd. is a modern enterprise specializing in drying, drug machines, chemical equipment design and manufacturing specialized in drying, coal -fired hot air furnaces, etc., and is committed to designing and manufacturing production lines. The company is located at S... Changzhou Suli Drying Equipment Co., Ltd. is a modern enterprise specializing in drying, drug machines, chemical equipment design and manufacturing specialized in drying, coal -fired hot air furnaces, etc., and is committed to designing and manufacturing production lines. The company is located at S...

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  • Changzhou Su Li drying equipment Co., Ltd.
  • Sanhekou Industrial Park, Zhenglu Town, Tianning District, Changzhou City
  • https://www.dryerindustrial.com/

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