Pressure Spray Dryer

The equipment consists of five core functional systems to form a full-process process chain, and each module achieves efficient coordination through industrial-grade design:

1. The atomization system uses a pump-driven pressure atomizer to support the atomization of solutions, emulsions, suspensions and pastes. The core components of the atomizer are made of tungsten carbide alloy or ceramic coating to ensure the wear resistance of high-viscosity materials.

2. The main body of the drying chamber adopts a cylindrical stainless steel structure, and a conical hot air distributor is configured on the top. The hot air flow pattern is optimized through CFD simulation to avoid vortexes and drying dead corners. The chamber is equipped with an insulation layer to reduce heat loss while ensuring operational safety.

3. The heating system supports multiple heat source configurations such as steam, electric heating, fuel oil/gas, and integrates high-efficiency finned heat exchangers and temperature sensors to achieve continuous adjustable inlet air temperature. The system is equipped with a waste heat recovery device to reuse the exhaust heat.

4. The gas-solid separation system adopts "cyclone separator + bag filter" two-stage filtration solution: the first-stage cyclone separator recovers the main product, the second-stage bag filter collects fine powder, and the final exhaust gas dust emission is ≤30mg/m³ (in compliance with GB16297-1996 standard). Wet scrubber can be used to solve special working conditions.

5. Intelligent control system based on PLC + touch screen distributed control system, real-time monitoring of key parameters such as feed pressure, hot air temperature, system negative pressure, etc., supports PID automatic adjustment and manual intervention dual mode. Integrated fault diagnosis algorithm can realize sound and light alarm and chain shutdown for abnormal conditions such as atomizer overload and heating system overtemperature, ensuring the safety of equipment operation.

1. Liquid atomization stage

The liquid is pressurized by a pump and enters the atomizer. It is broken into micron-sized droplets by centrifugal force or pressure difference to ensure the uniformity of subsequent drying.

2. Heat and mass exchange stage

The hot air generated by the heating system enters the drying chamber in a tangential direction through the distributor, forming a co-current or countercurrent contact with the droplets. The moisture on the surface of the droplets completes the constant-speed drying stage, and the internal moisture continues to evaporate in the deceleration stage through diffusion. For heat-sensitive materials, the active ingredient retention rate can be achieved by controlling the inlet air temperature.

3. Solid-gas separation stage

The dried particles settle to the conical bottom collector due to gravity, and the fine powder enters the cyclone separator with the air flow. The separated waste gas is purified by the bag filter and discharged by the induced draft fan.

1. High efficiency and energy saving: The optimized atomization structure and hot air flow field design increase the drying efficiency by more than 30% compared with traditional equipment. With the heat recovery technology and low-resistance air duct, the production cost is significantly reduced;

2. Accurate quality control: The closed-loop temperature control and adjustability of atomization parameters throughout the process ensure the moisture content and particle size distribution of the finished product, which is especially suitable for the drying of heat-sensitive materials (such as biological products and natural extracts);

3.Wide material adaptability: It can handle multi-form materials and provide customized structures for high-viscosity or easy-to-scale materials to ensure long-term stable operation of the equipment.

4.Intelligent operation and maintenance design: The modular structure design supports rapid disassembly and cleaning, and the downtime is significantly shortened;

5. Environmental protection and safety guarantee: The multi-stage dust removal system ensures that the exhaust gas dust emission is ≤30mg/m³ (national standard GB16297-1996), and is equipped with safety devices such as overload protection and over-temperature interlock, which complies with ISO 4419 mechanical safety standards.

1. Chemical industry: dyes, catalysts, resins, fertilizers, etc., to meet the drying needs of materials with different chemical properties;

2. Pharmaceutical industry: vitamins, pharmaceutical excipients, etc;

3. Environmental protection: mud, sewage treatment sludge, etc., to achieve efficient dehydration and resource utilization of high-water content materials.