Description of Hollow Paddle Dryer
Hollow paddle Dryer is an indirect Drying Equipment with hollow paddles/blades installed usually in a horizontal hollow axle rotating in a vessel. the wet feed is dried when the rotating paddles stir the materials and resulting in a close contact with the heated paddles and vessel shells. The dryer has a high heating transfer surface and high heat efficiency due to no heat loss in exhaust gas(only heat loss is radiation via heavily insulated dryer vessel, which is very trivial). The paddles are self-cleaning due to relative motion between the wet feed and the wedge-shaped paddles. Paddle dryer can work in batches or continuously, in vacuum, protective atmosphere or pressure conditions according to drying requirements and nature of wet feeds. The heating medium can be thermal oil or hot water with pressure from 0.1 MPa to 0.8 MPa, Steam with pressure up to 1.5 MPa. Working temperature: 40 C to 300 C. Evaporation capacity: 8Kg to 60Kg/m2.h.
Structure of Hollow paddle dryer
1. The process is save, stable, reliable, greatly reduce pollutant emissions;
2. Low engineering investment and operation cost, small footprint, low energy consumption;
3. Simple and convenient management mode, flexible operation mode. The operation mode and parameters can be adjusted according to the characteristics and quantity of sludge in different seasons;
4. Promote the automatic control of sludge treatment and disposal processt;
5. With steam as the heat source, and waste incineration power generation equipment run together. Using the concept of circular economy, it can greatly save resources and reduce energy consumption.
Application materials of hollow paddle dryer
Environmental protection industry: Sewage sludge, activated sludge, food sludge, oily sludge, textile dyeing sludge, chemical sludge, electroplating sludge, offscum of pharmaceutical factory, offscum of sugar factory, offscum of aginomoto factory, coal ash.
Organic fertilizer industry: Chicken manure, duck manure, pig manure, cow dung and so on.
Petrochemical industry: Polyolefin powder, high and low density polyethylene, linear low density polyethylene, polyacetal powder, nylon 6, nylon 66, nylon 12, cellulose acetate fiber, polyphenylene sulfide, allyl resin, engineering plastics, PVC, PVA, polrvinyl benzene, polypropylene, polyester, polyformaldehyde, styrene~acrylonitrile copolymerization, ethylene~propylene copolymerization
Feedstuff industry: Soy sauce offscum, bone matrix feed, distillers’ grains, heels of foodstuff, apple pomace, orange skin, bean pulp, chicken bone feed, fish powder, feed additive and chemical sludge.
Foodstuff industry: Starch, cocoa bean, niblet,
Chemical industry: Sodium carbonate, NPK compound fertilizer, kaolin, bentonite, carbon-white, conductex, phosphogypsum, oxidation sodium fluoride, lime nitrate, magnesium carbonate, sodium cyanide, calmogastrin, barium sulfate, annaline, calcium carbonate, dyestuff, molecular sieve, saponin.
Technical parameters of hollow paddle dryer
| Model | Heat exchange area (m2) | Power of motor (kW) | Evaporation rate (kg/m2/h) | Working temperature (℃) | Rotary speed (rpm) | Jacket working pressure (Mpa) |
| KJG-7 | 7 | 3 | 6~18 | 80~250 | 1~7 | 0.3~0.8 |
KJG-15
| 15 | 11 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-24
| 24 | 15 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-30
| 39 | 18.5 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-41
| 41 | 30 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-52
| 52 | 45 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-80
| 80 | 55 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-100
| 100 | 90 | 6~18
| 80~250
| 1~7
| 0.3~0.8
|
KJG-140
| 140 | 110 | 6~18
| 80~250
| 1~7
| 0.3~0.8 |
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