The closed-circuit spray drying system means that the drying medium circulates in a closed loop throughout the drying system, and uses inert gas instead of air as the drying medium. The inert gas is generally nitrogen. Inert gas can be recycled in the drying system and plays the role of heat transfer, moisture carrying and dehumidification. The drying system is often operated under positive pressure. If the internal pressure drops, the pressure transmitter can automatically control the entry of nitrogen to ensure the balance of the inert gas concentration in the system and control the oxygen content. The closed-circuit spray dryer is particularly suitable for drying materials containing organic solvents, as well as materials containing toxic gases or that are prone to oxidation during the drying process.

Closed-circuit circulating fluidized bed drying can well solve the drying problem of special materials. In modern industries, such as petrochemicals, fine chemicals, pharmaceuticals, pesticides, intermediates, bioengineering and other industries, there are many special materials that are sensitive to heat, or contain flammable and explosive solvents, or are prone to hygroscopic degeneration when exposed to the air. Their heat resistance is very poor, but the moisture content of the dried products is very strict (for example, it needs to be controlled below 0.1%), and the products are required to be dried evenly. This equipment has the advantages of high drying rate, good product quality, solvent recyclability, safety, and environmental protection.

A single-effect evaporator generally refers to a single independent evaporator. The secondary steam generated when evaporating a solution is no longer used, and is suitable for the evaporation of small-scale solutions. Single-effect evaporators rarely use intermittent evaporation. Common operating modes include semi-intermittent evaporation, continuous batch evaporation, continuous evaporation, etc.

Double-effect evaporator, also known as second-effect evaporator, usually uses the secondary steam generated by the first evaporator as a heating source again and introduces it into another evaporator. As long as the pressure and boiling point of the solution in the evaporator are controlled to appropriately reduce them, the secondary steam generated by the first evaporator can be used for heating. The secondary steam condensation point of the first evaporator is the heating point of the second evaporator. This is the principle of double-effect evaporation. Generally speaking: single-effect evaporation consumes 1.1~1.2 tons of steam per ton of water, and double-effect evaporation consumes 0.6~0.7 tons of steam per ton of water.

MVR evaporator is a new type of equipment that has attracted much attention in the field of evaporation and concentration in recent years and has demonstrated significant industry advantages. It consumes electrical energy or other forms of mechanical energy as the main energy source. Compared with traditional evaporators, it greatly reduces the consumption of raw steam, greatly reduces operating costs, and effectively saves the company's production costs. At the same time, the equipment is compactly arranged, occupies a small area, and consumes less circulating water, which greatly saves land and water resources. In addition, the system can achieve low-temperature operation, is suitable for evaporation and concentration of heat-sensitive materials, retains material quality to a large extent, and is widely used for specific materials in pharmaceuticals and food processing.

The horizontal belt mixer is a new type of mixing equipment with high efficiency, high uniformity, high loading coefficient, low energy consumption and low pollution. Its unique double-spiral belt structure design can mix materials evenly in a short time. It is usually used to mix thick or sticky granular materials, as well as materials that require adding liquid or paste to the mix. It is a widely used single-shaft horizontal mixer.

The WZ series gravity-free mixer consists of a horizontal barrel, a double-blade mixing shaft and a transmission mechanism.It has strong mixing power and can achieve rapid mixing in a short time. It is especially good at mixing materials with significant differences in physical properties such as density, fineness, and fluidity. Mainly used in electronic batteries, construction mortar, environmental protection, mining, agriculture and other fields, suitable for mixing powder, granular, fibrous and other materials.

The LDH series plow blade mixer is a new type of mixing equipment with high efficiency, high uniformity, high crushing, low energy consumption and low pollution. The mixer of this equipment consists of multiple sets of plowshares and flying knives. The plowshare and the cutting blade work simultaneously. It not only has good mixing effect, but also has high dispersing and shearing functions. It is especially suitable for dispersing and cutting powders that are easy to agglomerate during the mixing process.

The WH series twin-screw cone mixer uses a mixing method where two asymmetric screws operate within a conical cylinder. It features a large mixing range and fast mixing speed, suitable for mixing powder or granular materials. During the mixing process, thermally sensitive materials will not overheat, and granular materials will not be broken due to compression or grinding. Materials with significant quality differences and mixing ratios will not stratify or segregate.

The SZH series double cone mixer is named after the two ends of the cylinder are conical. When working, powdery or granular materials are added into the double cone-shaped container through vacuum conveying or manual feeding. As the container continues to rotate, the materials undergo complex tumbling, sliding and impact movements in the container to achieve uniform mixing. This machine is energy-saving, easy to operate, has low labor intensity and high work efficiency. It is suitable for mixing powdery and granular materials in pharmaceutical, chemical, food, building materials and other industries.

The VHJ series mixer has a unique V-shaped barrel structure with high mixing efficiency and no dead ends. It is suitable for mixing two or more dry powders or granules in pharmaceutical, food, chemical, metallurgical and other industries.