Spray drying equipment specifically designed for foods such as oats, peanut protein, and soy plant protein.

Product Introduction of LPG High-Speed Centrifugal Spray Dryer

Spray dryer、Spray drying towerIt is the most widely used process in liquid forming and drying industries. It is most suitable for producing powdered and granular solid products from suspension liquids, solutions, emulsions, and paste-like liquid raw materials. Therefore, when the particle size distribution, residual moisture content, bulk density, and particle shape of the finished product all meet precise standards,Spray dryerIt is an ideal drying process.

Key points

1. Contact between hot airflow and droplets: A sufficient amount of hot airflow entersSpray dryingWhen designing the chamber, the direction and angle of the hot airflow must be considered, whether it is co-current, counter-current, or mixed flow, to ensure full contact with the droplets and achieve adequate heat exchange.

2. Atomization:Spray dryerThe atomization system must ensure a uniform droplet size distribution, which is crucial. This is necessary to guarantee the product quality pass rate.

3. Design of pipe angle and cone angle: Based on our experience from producing nearly a thousand units,Spray dryerI have obtained some empirical data from the group and can share it with everyone.

Characteristics

1、Spray dryingThe speed is fast. After the feed liquid is atomized, its surface area increases significantly. During contact with hot air, 95%-98% of the moisture can be evaporated instantly, with the drying process taking only a few seconds. This makes it especially suitable for drying heat-sensitive materials.

2. The product exhibits good uniformity, flowability, and solubility. The higher the purity, the better the quality.

3、Spray dryerThe production process is simplified, and operation and control are convenient. Liquids with a moisture content of 40-60% (up to 90% for special materials) can be dried into powder or granular products in a single step, eliminating the need for crushing and screening after drying. This reduces production steps and improves product purity. The particle size, bulk density, and moisture content of the product can be adjusted within a certain range by changing operating conditions, making control and management highly convenient.

Working Principle:

Spray dryerIt is an open-cycle, concurrent-flow, centrifugal atomization system. The drying medium, air, is filtered through primary and medium-efficiency air filters, then drawn by a blower according to operational instructions, heated by a heater, and passed through a high-efficiency filter's hot air distributor before entering.Spray dryingMain tower. Liquid materials pass through a peristaltic pump according to operating instructions and enter a high-speed rotating centrifugal spray head, where they are dispersed into small droplets under the action of centrifugal force.Spray dryingInside the main tower, small droplets come into full contact with hot air, undergo heat exchange along their specific paths, and are dried into products. They are then separated through a cyclone separator, where solid materials are collected, and the gaseous medium is filtered before being discharged. The entire spray system is easy to clean, has no dead corners, and complies with GMP requirements.

Scope of Application

Chemical products: polyaluminum chloride, disperse dyes, reactive dyes, organic catalysts, white carbon black, laundry detergent, zinc sulfate, silicon dioxide, sodium metasilicate, potassium fluoride, calcium carbonate, potassium sulfate, inorganic catalysts, various waste liquids, etc.

Food: amino acids, vitamins, egg powder, bone meal, seasonings, protein, milk powder, pig blood powder, soy sauce powder, coffee, tea, glucose, potassium sorbate, pectin, flavors and fragrances, vegetable juice, yeast, starches, etc.

Ceramics: aluminum oxide, zirconium oxide, magnesium oxide, titanium oxide, magnesium titanate, clay, porcelain clay, various ferrites and metal oxides, etc.

Specialized for Soybean Plant ProteinSpray drying equipment

1. Principle:

Soybean plant protein has high viscosity and is not easily atomized. Ordinary high-speed centrifugal atomizers cannot atomize it effectively, and conventionalPressure Spray DryerThe height is too great, significantly increasing investment costs, and the feed temperature of this material is very high. Based on these characteristics, Changzhou Lima Drying Engineering Co., Ltd. has combined it into a hybrid of pressure spray and centrifugal spray.Spray drying towerThe tower body is designed as a centrifugal type (short and stout configuration), with the air intake also adopting a centrifugal design (centrifugal air intake volute). The atomization method uses a pressure type (as the centrifugal atomizer cannot effectively atomize this material, and materials atomized by centrifugal force are not instant-soluble, the pressure type must be used). With this combination, the investment cost is significantly reduced while fully meeting the design requirements.

II. Structural Form:

1. Discharge method: Centralized discharge via a cyclone separator.Spray dryerNo finished product is discharged from the bottom of the main tower. Due to the poor flowability of soy protein powder, it tends to adhere to the walls in the cone section. A chain-type scraper is installed in the cone, and under the action of transmission force, the chain scrapes off the powder adhering to the walls. The scraped powder falls and is collected by a cyclone separator along with the airflow. The collected material is then transported to the packaging workshop via pneumatic conveying. During the pneumatic conveying process, cold air is simultaneously introduced to cool the material to room temperature.

2. Spraying method: usingPressure spray dryingThe homogenizer has been modified to serve as a high-pressure pump, providing high-pressure kinetic energy.

3. The spray system adopts multi-nozzle atomization. To prevent droplet cross-interference during high-pressure nozzle atomization, the nozzle atomization area uses a semi-circular structure. The high-pressure nozzles are pressure nozzles produced by the American Spray Company.

4. To preventSpray drying towerIf the negative pressure is too high, a negative pressure protection device is installed at the air intake pipe opening.

5. This drying method can **maximally** preserve the active ingredients of soybean protein powder without causing damage.

6. The hot air distributor is manufactured using imported technology. To prevent airflow deviation, the hot air distributor is divided into multiple air inlets, each equipped with an inlet regulating valve, ensuring that hot air enters evenly and in a rotating manner.Spray drying towerInside, it ensures full utilization of heat and prevents the material from sticking to the wall.