Propionic acid airflow dryer

Release date: August 29, 2019

Propionic acid dryer, propionic acid drying equipment, propionic acid airflow dryer, propionic acid pulse airflow dryer. Changzhou Xinke Drying Equipment Co., Ltd. www.xkdry.com

Design scheme for propionic acid airflow drying

1、 Process conditions

1. Material name: Propionic acid

2. Dry product yield: 6000Kg/20h

3. Initial moisture content: 5-10%

4. Final moisture content: 0.2%

5. Dry particle size: small crystalline particles

6. Dry product stacking density:~ 0.9g/cm3

7. Specific heat of dry material: 0.4Kcal/kg. ℃

8. Drying temperature: 130 ℃

9. Air outlet temperature: 80 ℃

10. Heating method: steam

11. Recycling method: primary cyclone separator+pulse bag filter

12. Moisture properties: surface water

13. Equipment material: SUS304 stainless steel at the material contact point

14. Installation: Indoor

15. Power supply: 380V 50HZ

16. Environment: 20 ℃ 760mmHg with a diameter of 80%

(Humidity content of ambient air: 0.012Kg/kg)

2、 Process Calculation

1. Water evaporation rate: 33kg/h

2. Dry product yield: 300 kg/h

3. Wet product processing capacity: 333kg/h

4. Dry air consumption: 3150kg/h

5. Exhaust gas exhaust volume: 3780m3/h

6. System heat consumption: 78750kcal/h

3、 Technical parameters:

According to the requirements, one QG-60 pulse airflow dryer is proposed to be selected

working principle:

The characteristic of a pulse airflow dryer is the alternating reduction and expansion of the diameter of the airflow drying tube. The use of pulse airflow drying tubes can fully utilize the high heat and mass transfer capabilities of the acceleration section to enhance the drying process. The added material particles first enter the drying tube with a smaller diameter, and the particles are accelerated. When their acceleration motion ends, the drying tube diameter suddenly expands, and the particles enter the drying tube with a larger diameter by inertia. Particles continuously decelerate due to resistance during their movement until the deceleration is complete. The drying tube suddenly shrinks again, causing the particles to be accelerated again. By repeating this process alternately, the diameter of the tube shrinks and expands, causing the particle's movement speed to accelerate and decelerate alternately. The relative velocity and heat transfer area between air and particles are relatively large, thereby enhancing heat and mass transfer rates. At the same time, the decrease in airflow velocity inside the expanding tube also increases the drying time accordingly.

After purification, the outside air is heated by steam to a drying temperature of around 130 degrees and enters the drying tube. Wet materials are fed into the airflow drying acceleration tube by a spiral feeder. The materials are dispersed by high-speed hot air flow in the acceleration tube and suspended in the hot air. Gas and solid move in parallel, and the hot air transfers heat to the materials. After absorbing heat, the materials quickly undergo heat and mass exchange, and the evaporated moisture enters the air. Therefore, the heat and mass transfer process between gas and solid continues in the pulse airflow drying tube until the upper part of the drying tube is close to the critical moisture content (i.e., the constant speed drying process of the materials ends). After that, the materials enter the deceleration drying. When the mixture enters the cyclone separator, the wet air separates from the materials, and the dry materials are separated by the cyclone. Lower recycling, The exhaust gas is filtered by a bag filter and discharged into the atmosphere by an induced draft fan.

Main equipment design:

1. Steam heater:

(1) Quantity: 120 square meters

(2) Material: SUS304 stainless steel

(3) Attachment: 1 piece of SUS304+non-woven fabric+fiberglass air filter for primary and medium efficiency

2. Supply fan

(1) Model: 4-5.2-3.2A

(2) Power: 1.8kw explosion-proof motor

(3) Material: SUS304 (regulating air door; 1 piece)

3. Feeding system:

(1) Model: 1 set of φ 114 spiral feeder

(2) Power: 1.5kw Variable Frequency Speed Control Motor Explosion proof

(3) Material: SUS304 stainless steel at the material contact point

Attachment: One SUS304 feeding hopper

One SUS304 feeding tube

Spiral shaft 1 piece SUS304

1 set of 3mm SUS304 blades

1 piece of bearing

1 coupling

Transmission motor 1 BWT12-59 1.5KW

Operating platform 1 piece A3

4. Primary drying host:

(1) Dry straight pipes: 5 pieces of diameter 270, material: 1.5mm, SUS304

(2) Pulse tube: 2 pieces of diameter 380, material: 1.5mm SUS304

(3) 180 degree bend pipe: φ 270 × R540 1 piece Material: 1.5mm SUS304

(4) 90 degree bend pipe: 4 pieces, diameter 270 × R540, material: 1.5, A3+SUS304

Square diameter circle: 3 pieces, 1.5mm, A3+SUS304

(6) Hot air inlet duct: 1 piece 1.5mm, SUS304

(7) Host height:+11 meters

5. First level cyclone:

(1) Model: CLT -1 set of φ 600 cyclone separator

(2) Material: 2.5mm, SUS304

(3) Material cutting: 1 piece of TFGY2.8L 0.75KW air damper

Explosion proof motor

6. Secondary pulse bag filter:

(1) Model: MC-48 1 unit

Bag filter area: 36 square meters

(2) Host material: 3mm, SUS304

(3) Cutting: Turn off the fan, TFGY2.8L 0.75KW 1 piece

7. Induced draft fan:

(1) Model: 9-26-3A, 7.5kw, 1 unit

(2) Material: A3 (1 air regulating valve) Explosion proof motor

(3) Chimney: 1 piece A3

8. Control:

(1) Electrical components: 1 set

(2) Control cabinet: 1 unit, A3

(3) Feeder: Variable frequency speed regulation

(4) Inlet and outlet air temperature: XMT instrument digital display and free setting of dryer inlet temperature

(5) Induced draft fan: manual button control

9. Other

1 set of random software materials

Equipment Layout Plan, Product Qualification Certificate, Electrical Schematic Diagram, Equipment User Manual