Product Introduction
The product can indirectly heat or cool paste, granule, powder and slurry materials, and can complete unit operation such as drying, cooling, heating, sterilization, reaction and low-temperature combustion. The special wedge-shaped stirring heat transfer blade in the equipment has high heat transfer efficiency and self-cleaning function of the heat transfer surface.
working principle
Wedge shaped hollow blades are densely arranged on the hollow shaft, and the thermal medium flows through the blades through the hollow shaft. The heat transfer area per unit effective volume is large, and the temperature of the thermal medium ranges from -40 ℃ to 320 ℃. It can be water vapor or liquid, such as hot water, heat transfer oil, etc. Indirect conduction heating does not carry air away heat, and the heat is used to heat the material. The heat loss is only the heat dissipation to the environment through the insulation layer of the body. The heat transfer surface of the wedge-shaped blade has self-cleaning function. The relative motion between material particles and the wedge surface produces a washing effect, which can wash away the attached materials on the wedge surface and maintain a clean heat transfer surface during operation. The shell of the paddle dryer is an Ω type, with two to four hollow mixing shafts generally arranged inside the shell. The shell has a sealed end cover and an upper cover to prevent the leakage of material dust and fully play its role.
The heat transfer medium flows through the shell jacket and the hollow stirring shaft through a rotating joint. The hollow stirring shaft has different internal structures based on the type of heat medium to ensure better heat transfer effect.
Performance characteristics
◎Low energy consumption of the paddle dryer: due to indirect heating, there is not a large amount of air to carry away heat. The outer wall of the dryer is also equipped with an insulation layer, and for slurry materials, only 1.2kg of water vapor is needed to evaporate 1kg of water.
◎The cost of the blade dryer system is low: it has a huge heat transfer surface per unit of effective volume, which shortens the processing time and reduces the equipment size. This greatly reduces the building area and space.
◎ Wide range of material processing: using different thermal media, it can handle both heat-sensitive materials and materials that require high-temperature treatment. Commonly used media include: steam, heat transfer oil, hot water, cooling water, etc.
It can be operated continuously or intermittently and can be applied in many fields.
◎Low environmental pollution: Do not use carrying air, and there is little dust and material entrainment. The evaporation of material solvent is very small, which is convenient for treatment. For contaminated materials or working conditions that require solvent recovery, the following methods can be usedClosed loop.
◎ Low operating cost: structure. Low wear and tear, low maintenance costs.
◎ Stable operation: Due to the special compression expansion stirring effect of the wedge-shaped blade, the material particles fully come into contact with the heat transfer surface. Within the axial range, the temperature, humidity, and mixing gradient of the material are very small, thus ensuring the stability of the process.
Adapt to materials
Paddle dryers have been successfully used in fields such as food, chemical, petrochemical, dye, and industrial sludge. The characteristics of heat transfer, cooling and stirring of the equipment enable it to complete the following unit operation: combustion (low temperature), cooling, drying (solvent recovery), heating (melting), reaction and sterilization. The stirring blade is also a heat transfer surface, which increases the heat transfer area per unit effective volume and shortens the processing time. The heat transfer surface of the wedge-shaped blade also has self-cleaning function. The compression expansion mixing function ensures uniform mixing of materials. The material moves in a "piston flow" along the axial direction, and within the axial range, the temperature, humidity, and mixing gradient of the material are very small. The use of heat transfer oil as a thermal medium in the blade dryer can complete low-temperature combustion work. For example, calcium sulfate dihydrate (Ca2SO4 · 2H2O) is converted into calcium sulfate hemihydrate (Ca2SO4 · 1/22H2O) by combustion. Sodium bicarbonate (NaHCO3) is converted into soda ash (Na2HCO3) through calcination. Cooling media such as water and cooling brine can be introduced for cooling. For example, the blade type alkali cooler used in the soda ash industry replaces the old-fashioned air cooled alkali cooler, saving energy and exhaust gas treatment equipment, and reducing operating costs. The main function of drying equipment is not to use hot air, making solvent recovery, energy consumption, and environmental control in an ideal state that is easy to handle. It is particularly suitable for solvents that need to be recycled and for flammable and easily oxidizing heat sensitive materials. It has been widely used in the fine chemical, petrochemical, and dye industries. The uniformity of temperature, humidity, and mixing degree within the axial range allows the equipment to be used for heating or melting, or for some solid material reactions. It has been successfully used in the composite fertilizer and modified starch industries. Paddle dryers can be used to sterilize food and flour. The large heating area within the unit effective volume quickly heats the material to the sterilization temperature, avoiding long-term heating that can alter the quality of the material.
Installation structure diagram
Technical specifications
|
Project/Model
|
JYG3
|
JYG9
|
JYG13
|
JYG18
|
JYG29
|
JYG41
|
JYG52
|
JYG68
|
JYG81
|
JYG95
|
JYG110
|
|
heat transfer area(m2)
|
3
|
9
|
13
|
18
|
29
|
41
|
52
|
68
|
81
|
95
|
110
|
|
Effective volume(m3)
|
0.06
|
0.32
|
0.59
|
1.09
|
1.85
|
2.8
|
3.96
|
5.21
|
6.43
|
8.07
|
9.46
|
|
speed range(rmp)
|
15-30
|
10-25
|
10-25
|
10-20
|
10-20
|
10-20
|
10-20
|
10-20
|
5-15
|
5-15
|
5-10
|
|
power(kw)
|
2.2
|
4
|
5.5
|
7.5
|
11
|
15
|
30
|
45
|
55
|
75
|
95
|
|
Body width A(mm)
|
306
|
584
|
762
|
940
|
1118
|
1296
|
1476
|
1652
|
1828
|
2032
|
2210
|
|
Width B(mm)
|
736
|
841
|
1066
|
1320
|
1474
|
1676
|
1854
|
2134
|
1186
|
2438
|
2668
|
|
Body width C(mm)
|
1956
|
2820
|
3048
|
3328
|
4114
|
4724
|
5258
|
5842
|
6020
|
6124
|
6122
|
|
Total length D(mm)
|
2972
|
4876
|
5486
|
5918
|
6808
|
7570
|
8306
|
9296
|
9678
|
9704
|
9880
|
|
Incoming and outgoing distance E(mm)
|
1752
|
2540
|
2768
|
3048
|
3810
|
4420
|
4954
|
5384
|
5562
|
5664
|
5664
|
|
center height F(mm)
|
380
|
380
|
534
|
610
|
762
|
915
|
1066
|
1220
|
1220
|
1220
|
1220
|
|
Height H(mm)
|
762
|
838
|
1092
|
1270
|
1524
|
1778
|
2032
|
2362
|
2464
|
2566
|
2668
|
|
steam inlet N(寸)
|
3/4
|
3/4
|
1
|
1
|
1
|
1
|
11/2
|
11/2
|
11/2
|
11/2
|
2
|
|
delivery port O(寸)
|
3/4
|
3/4
|
1
|
1
|
1
|
1
|
11/2
|
11/2
|
11/2
|
11/2
|
2
|
