Introduction: Drawing on our years of practical production experience, our company has carried out bold innovation and multiple test modifications to develop this zero‑emission air dryer. Compared with conventional tray dryers, it brings revolutionary improvements and resolves the problems of fugitive emissions and high labor intensity. The equipment is fully enclosed. Both target materials and solvents can be completely recovered for reuse, realizing recycling of materials and solvents with considerable economic benefits.

Core Technical Highlights

1. Complete air dryer unit:

Full enclosed design with circulating air drying mode, no escape of material or solvent odors. Fugitive emission gas is collected for organized discharge, making it highly environment‑friendly for operation sites.

It adopts an innovative air-drying mode. The rotary feeder integrates material distribution, conveying and air drying into one unit. The flowing hot air achieves a large contact area with materials, delivering high drying efficiency. It avoids scraper wear and material residue on the tray surface that commonly occur in conventional tray dryers. Meanwhile, the equipment features controllable constant temperature throughout, which prevents local overheating. It is especially suitable for oxidizable and heat-sensitive materials.

The hollow rotating shaft is connected to the rotary scraper. Hot air is delivered directly with low energy loss. One shaft serves multiple functions. The compact equipment footprint minimizes workshop space occupation.

Advantages of Complete Product Package

1. High Efficiency and Energy Saving: Adopting circulating air drying mode, it makes efficient use of heat energy and solvent vapor to improve drying efficiency. It also realizes recovery and reuse of materials and solvents, cutting down energy consumption and operating costs.

2. Environmental Protection & Health: The fully enclosed design and organized emission system effectively control the release of waste gas and odors. It complies with stringent environmental discharge standards, creates a cleaner workplace, and protects operators’ health and occupational safety.

3. Unique Process Design: The rotary distributor combined with an innovative air drying pattern increases the contact area between materials and hot air, improving the drying performance.

4. Reliability and Stability: After numerous tests and improvements, the process and equipment system with fully independent intellectual property rights ensures stable operation of the unit. It also supports remote monitoring and fault diagnosis to reduce downtime and maintenance costs.

5. Wide Application: It can be used in various industries such as chemical, pharmaceutical and food sectors. It is suitable for the drying of solid materials and solvents, covering materials of diverse forms and particle sizes. It can also serve as a reactor for gaseous and solid materials. The gaseous materials can be recycled to prevent fugitive release and waste.

6. Flexible Configuration: It can be optionally equipped with feeder, discharger, cyclone separator, conveyor and other equipment to achieve fully unattended operation. The whole unit can also be skid‑mounted to avoid unnecessary material handling and meet diverse customer requirements.

Tank-Type Filter-Wash-Dry Three-in-One

Function Introduction: The tank-type filter-wash-dry "three-in-one" equipment is independently developed by our company on the basis of fully digesting and absorbing the multi-functional filter dryers from world-leading overseas manufacturers of tank filtration and drying equipment, Nutsche Filter and Rosenmund. Integrating a wide range of advanced foreign technologies, it reaches world-class performance. Depending on application requirements, it is available in industrial grade, food grade and pharmaceutical grade.

The three‑in‑one equipment is the optimal unit for filtration, washing and drying. It enables fully enclosed continuous operation throughout the whole process, making it particularly suitable for the production of sterile and toxic products. It is widely applied in pharmaceutical, chemical, pesticide, food, biological and other industries.

Structure

The three‑in‑one equipment mainly consists of vessel, base plate, driving unit, agitator assembly, heating device, discharge valve, support and other parts.

Vessel: It adopts a cylindrical shell structure with an elliptical head on the top. The vessel can operate under pressurized or vacuum conditions. A jacket or half‑pipe heating circuit is welded on the outer wall of the vessel. The material of construction is selected according to material properties and process conditions, such as SUS304, 316L and carbon steel with anti‑corrosion treatment.

Base Plate: Available in fixed and detachable types. It consists of support structure, heating device and filter medium.

Filter Medium: Filter cloth, wire mesh or sintered plate are commonly adopted.

Drive Unit: Mounted on the top of the head. Two drive types are available: motor with reducer and hydraulic motor.

Agitation Assembly: Consists of sealing assembly, agitator shaft and agitator blades. The agitation assembly is capable of variable-speed, clockwise and counter-clockwise rotation, as well as constant-speed upward and downward movement. Meanwhile, the sealing assembly is available in two types: packing seal and mechanical seal. The agitator blades adopt a special S-shaped structure, which facilitates material turnover up and down and improves heat transfer performance.

Heating Device: The cylinder can be heated by half‑pipe or jacket heating; heat medium can be introduced into the base plate for heating, and heat medium is supplied to the agitator blades through rotary joints. These heating structures can be used either individually or in combination.

Discharge Valve: Available in manual and hydraulic operation types.

Support: Vertical support, fabricated by welded steel structure.

Working Principle

Filtration Process: After the slurry enters the vessel, solid‑liquid separation is realized by pressurization or vacuum filtration. When cracks appear on the surface of the filter cake, lower the agitator blades down to the cake surface. Reverse rotation of the agitator compacts and smoothes the filter cake surface to avoid channeling during filtration, thus improving filtration efficiency and quality.

Washing Process: The filter cake is further purified to wash out residual mother liquor and perform pre‑dewatering. The agitator is lowered layer by layer to mix the filter cake with washing liquid, forming a slurry, so that the filter cake in suspension can be thoroughly washed.

I. Vessel

1、Seal Material: Fluororubber, silicone rubber, etc.

2、Corrugation Material: SUS304, 316L, etc.

3、Sealing Type: Double seals are arranged at each sealing point.

II. Agitator Shaft

The agitator shaft is available in solid or hollow types. Solid shafts are used when heating of materials by the agitator is not required, while hollow shafts are adopted when the blades need to heat materials during drying.

III. Agitator

Agitators are available in two‑blade or three‑blade configurations. Agitator blades can be of round tubular or triangular shape. Heat‑carrying media can pass through the internal cavity of the blades to heat the material, and the agitator plays a key role in filtration, washing and drying processes. Depending on material properties, the agitator may be equipped with scrapers or without scrapers.

Drying Process: Dehydration and drying of the filter cake. While the filter cake is scraped and loosened layer by layer by the agitator, the side wall of the vessel, the bottom of the filter plate and the moving agitator blades heat the filter cake simultaneously. The moisture evaporates rapidly to achieve drying. Vacuuming inside the equipment accelerates evaporation. Treated hot nitrogen or other media can be introduced to carry away the evaporated moisture, speeding up material drying and improving drying efficiency.

Discharging Process: The dried material is automatically discharged from the side outlet by the pushing action of reversely rotating agitator blades.