Sludge Paddle Dryer Україна

Working Principle and Applications: 

Working principle: KJG Paddle Dryer is highly efficient, mechanically agitated, indirect-heating drying processor. KJG paddle dryer consists of a jacketed trough and two counter-rotating shafts with unique intermeshing hollow discs to produce intimate mixing and optimize heat transfer. Heating medium, such as steam, hot water or hot thermal oil, is forced to circulate both inside the heating jacket and hollow discs to form heating surface.

Wet material is conveyed through the paddle dryer by the agitator paddles welded on disc peripheries. With regular mixing, shearing, displacement and heat transfer, moisture evaporates fast and uniformly. When wet material reaches the opposite end of the dryer, it's dried and discharged directly. Evaporated moisture is sucked out by the draft fan and goes through the cyclone, condenser and wet scrubber to considerably reduce air contamination.

Applications: KJG paddle dryer is commonly used for drying municipal sludge, industrial sludge,  paper sludge, drilling mud, biomass waste, digested manures etc. with process capacity of 100 kg/hr to 3 tons/hr. 

Technical Features: 

1. Advantages of hollow disc: The hollow disc is welded together by two halves of pressed disc plate on the edge. It has the following advantages compared to traditional wedge-shaped paddle:  

• More hollow discs can be installed to get more heating surgace; 
• Hollow disc has much longer service-life due to robust structure, much less weld and much weaker friction with raw material;
• The agitator paddles (or blades) welded on the disc edge with different angle and quantity can perfectly mix, move and crush the wet material for uniform and high-rate of heat transfer. It works just like a double-shaft auger.
• Hollow disc has self-cleaning function due to its unique structure and the intermeshed blades can also help clean the disc surface for intimate heat transfer. 
• Guide plates inside the discs can make sure heating medium reach every corner and forced to flow back into the center return pipe without short-circuit. 

2. High thermal efficiency:  The drying process is done in a well insulated trough and indirect heating can minimize off-gas flow to considerably reduce heat loss. The thermal efficiency can reach as high as 95%. 

3. Environment-friendly design: The off-gas treatment system, which includes cyclone, tubular condensor, single or two-stage wet scrubber, can reach very high emission standard. 

4. Compact structure: A large heat transfer area to volume ratio is achieved by the use of hollow discs and jacketed vessel, through which the heating medium flows. The result is a compact machine with less space requirements and lower installation cost.

5. Wide application: KJG paddle dryer can handle various kinds of raw materials, no mater the raw material is thick liquid, slurry, sticky paste or filter cake, wet powder, small granules etc. The drying process can be batch or continuous operation. 

Technical parameters: 

Note: Our KJG Paddle Dryer is available in many sizes and configurations. The above models with typical design are indicative only. 

FAQ: 

Q: What information is needed in order to get a quote? 

A: Our KJG Paddle Dryer is customized according to specific wet material, drying capacity and heat source. The drying capacity ranges from 100 kg to 3 tons/h. The following information is needed to work out a detailed quote:

1) Detailed information of sludge to be dried: 

• Type of sludge (sewage sludge, industrial sludge,  main components etc.) 
• Status of sludge ( filter cake, paste or slurry; bulk density etc.)
• Specifc properties (corrosive, toxic, flammable etc.) 

2) Moisture content before drying; target moisture content in dried product; 

3) Required drying capacity in kg/h; 

4) Heating medium: steam or hot thermal oil 

5) Power supply type: 220V/380V/415V/440V, 50/60Hz, three phase 

Q: What is your normal lead time? 

A: All our dryers are customized. The normal lead time is 50-60 days after receiving the advance payment.

Q: How the dryer is delivered? 

A: Sludge paddle dryer is quite big indutrial machine and its weight ranges from 3 tons to 50 tons. When the heating area is less than 60 M2, the dryer body can be shipped by 40 feet HQ container; 60-150 M2 should be shipped by 40 feet OT container; more than 150 M2, the dryer body has to be dismantled for shipping. 

Q: What kind of after-sale service can you provide? 

A: 1)  All our machines are fully tested before shipping. Detailed operation manual, which includes photos, installation & operation videos, layout drawings, electric drawings etc. is delivered with the machine. So the end-user can easily install and operate the machine. 

2) In response to cutomer's invitation, technicians can be sent to the end-user's workshop for installation, commissioning and training. 

3) Provide life-long technical consultation and favorable spare parts.