Jiangsu Jinling Environmental Technology Co., Ltd.
Current Position:Home > PRODUCTS > Sludge drying system

Sludge drying system
Low temperature(heat pump)sludge belt dryer
DATE:2020-08-05   VISITS:419

Principle

The low-temperature drying unit uses the Carnot cycle principle and is equipped with a combination of air supply and heat exchange systems. It is a new type of high-efficiency and energy-saving drying unit. According to the Carnot cycle principle, the compressor consumes a small amount of electric energy to drive the compression on the medium temperature gas which generates high temperature and high-pressure gas. This gas enters the condenser and releases heat, then the heat released from the condenser is sent to the drying chamber by the circulating fan to heat up the materials in the drying chamber and repeat the cycle. The temperature rises and absorbs the moisture in the material, where the surface moisture is continuously vaporized, then the evaporator is cooled and dehumidified, and the moisture in the material is discharged to dry the 

低温带01.jpg


Main feature

Uses closed-circuit or micro-negative pressure operation, no odor overflow or overflow treatment, low energy consumption and low emissions;

Uses low temperature drying (generally ≤ 80℃), avoids high temperature or easily causes high temperature during corrosion drying, high safety rating;

The use of low-temperature drying can greatly reduce the need for energy during the drying process, thus reducing operating costs (the heat pump heating investment is large, and the operating cost is high);

It is suitable for the treatment of massive sludge with 50~75% feed water content and small corrosive components in the sludge;

Large processing capacity, single-layer or multi-layer structure design can be adopted, and the sludge moisture content ≤ 75% can be directly dried to about 10%;

High degree of automation, simple process structure, energy efficient and environmentally safe, wide application.

低温带02.jpg


Comparison of main features

Project nam

Medium temperature 

belt dryre

Low temperature belt dryer(

Not hot pump)

Low temperature(heat 

pump)belt dryer

Belt conveyor

Stainless steel or plate

Plastic or stainless steel mesh

Plastic or stainless

 steel mesh

Temperature

110-150℃50-75℃50-85℃

Dehumidification

metho

Open type (dehumidification 

+ condensation

Closed circuit (condensation)

 or slight negative pressure

Closed circuit

 (condensation)

Heat consumption

Steam, waste heat, heat 

transfer oil

Hot water or waste hea

Electric

Investment amount

general

Higher

High

Feed moldin

Extrusion, cutting, 

granulation

Extrusion, cutting, granulation

Extrusion, cutting,

 granulatio

Dry material coolin

Material temperature is high, 

need cooling

Low material temperature, 

no need for cooling

Low material temperature, 

no need for cooling

Energy consumptio

general

low

High

Exhaust

Larger displacemen

Smaller displacement

Nothing

Area

Smaller

Larger

Larger

The low-temperature drying process uses hot water, electricity or low-temperature waste heat as a heat source for a medium-temperature belt dryer. The drying temperature is generally 50~80℃ during operation. The evaporated warm air passes through a condenser (or heat pump) and this causes drying

The low-temperature belt dryer comes in two forms: closed-circuit structure and micro-negative pressure structure. The former can use heat pump condensing cycles and/or direct condensing cycles

低温带03.jpg


Technical parameters (reference)

Main technical performance indexes of heat pump sludge low-temperature dryer

N

Projec

Unit

TSD

50E

TSD

100E

TSD

150E

TSD

200E

TSD

400E

TSD

600E

TSD

800E

TSD

1000E

TSD

1200E

TSD

1400E

TSD

1600E

1

Water removal capacit

KG/H30~5060~10090~150120~200240~400360~600480~800600~1000720~1200840~1400960~1600

Maximum daily water remova

t/24h1.22.43.64.89.614.419.224.028.833.638.4
2

Operating 

power

KW13264053104154206260311367417
3

Preheating 

powe

KW918181836547290108108144
4

Heat pump 

module

Set

1×131×261×401×52HP2×52HP3×52HP4×52HP5×52HP6×52HP7×52HP8×52HP
5

compressor

Platform

146816243240485664
6

Dimensions 

LxWxH
m4×2.2×2.35.7×2.3×2.85.7×2.4×2.85.7×2.6×2.811×2.6×2.817×2.6×2.822×2.6×2.828×2.6×2.817×4.2×2.839×6.2×2.822×4.2×2.8
7

Overall quality

t2.545612182430313140
8

Structure type


Assembly

9

Noise

dB(A)≤75
10

Control way


PLC control + touch scree

11

Refrigerant


R134a
12

Forming method


Cut and squeeze

13

Moisture content

%

Feed water content: 85%~60%, discharge water content: 60%~10% Design and selection according to sludge properties, moisture content and customer requirements

14

Drying temperature

50 ~ 65°C ( 回风 )/60 ~ 75°C ( 送风 )
15

Discharge temperature

≤ 55
16

Cooling method


Dehumidification circulating water cooling + single heat circulating air coolin

17

Power 


380V,3H,50Hz

The ability to remove water is closely related to the properties of the sludge (such as composition, humidity, viscosity, etc), as well as the front-end dehydration process, ambient temperature and humidity When selecting equipment, these factors need to be considered If necessary, tests are required to determine the water removal capacity parameters based on the test data




2015
Founded
100+
Product Types
500+
Customer Cases
100+
Cooperative enterprises