How to Use a Coffee Spray Dryer for Delicious Instant Coffee

Instant coffee is one of the top choices among people today, thanks to its quick preparation and refreshing properties. Originally, coffee is made from multiple processes and with the use of many methods, but all of them either take dedicated time or require costly equipment to prepare. That's why instant coffee powder has become a lifesaver for everyday hassles. The preparation of this coffee powder is done using a spray dryer, which operates on the principle of atomization. This process takes place with the help of brewed coffee, by transforming it into soluble powder through the dehydration process.

There are various techniques used for drying, but spray drying is one of the top choices widely used in the food industry. For the production of instant coffee powder. In this comprehensive blog, we will explore all the aspects related to it. From the coffee spray drying process to its advantages and applications in the instant coffee industry.

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What is a Coffee Spray Dryer?

In simple terms, a coffee spray dryer is equipment specifically designed to convert perfectly brewed liquid coffee into a concentrate, then into a fine powder for use as instant coffee powder. The primary focus of this process is on fast dehydration by transforming the concentrated solution into tiny droplets. Then, using hot air for water evaporation, and lastly, getting dry coffee powder. The evaporation of moisture leaves fine, free-flowing particles that can be easily reconstituted in water. The core role of spray drying equipment in coffee production is as follows:

1. Preserve Flavour: The delicate coffee is often recognized by its aroma and flavor substances, which are damaged by long-term high temperatures. That's why spray dryers lock in the mellow taste of coffee, preserving its originality to the maximum extent through "instant drying," which is often done in a few seconds.

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2. Ensure Soulbility: The high-quality instant coffee powder is easily soluble in water within a matter of seconds. This fine texture, formed during the drying process, produces uniform particles that dissolve quickly. If the spray dryer is high-quality and efficient, it ensures there's no slump during coffee brewing by controlling particle size.

3. Improve Efficiency: The machine cuts the labor cost and saves an enormous amount of time by making the production a single process. You get a liquid slurry to fine powder without multiple processing steps, making it best for large-scale production.

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What Does the Spray Drying Process Look Like For Instant Coffee

This process is divided into five steps, from extracting raw coffee beans to the result of dried coffee powder packed into moisture-free packets.

 

 

Step 1: Coffee Extraction

As for the first step, the coffee beans are roasted, ground, and finely brewed to produce a concentrated liquid feed for the next step. Then the extracted liquid is filtered to remove the solids that are insoluble, and a coffee solution free of any impurities is obtained.

Step 2: Pre-Concentration

This step is optional, but is done to improve the taste and aroma further. In this step, the liquid coffee may undergo evaporation, resulting in a solid concentration (typically 30-35% solids) before spray drying. With the help of this step, energy consumption during drying is reduced.

Step 3: Atomization

Now, the coffee extract is inserted into the drying chamber for atomization of fine droplets around 20-180 microns. Rotary atomizers, often known as high-speed spinning disks or nozzle atomizers, whether pressure- or pneumatic-driven, are commonly used.

Step 4: Drying

After atomization, in the drying step, hot air (150-250°C) is introduced into the chamber to evaporate moisture from the droplets instantly. This process of drying takes only a few seconds and results in preserving the coffee flavour and aroma.

Step 5: Powder Separation & Collection

In this last step, the particles of coffee that are dried get separated from the exhaust air by using a cyclone or bag filter. Later, this powder is cooled and packed into moisture-proof containers.

 

Why Choose Achieve Chem For Your Coffee Drying Equipment

Achieve Chem has established its presence since 2008, manufacturing high-quality equipment to this day, leading the market with multiple certifications. We are a professional manufacturer of Bioreactors, jacketed and stainless-steel reactors, rotary evaporators, drying equipment, distillation equipment, and other supporting chemical equipment.

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Achieve Chem has EU CE certification, an ISO 9001 quality management certificate, and a special equipment license with GMP standards.

Our spray dryer machines feature precision temperature control (±1°C) and energy-efficient designs with on-site installation services.

We also offer customization for pharmaceutical, dairy, chemical, and food applications, with 24/7 global technical support for life.

Our services are backed by our parent company, XIAN RICH SMART TECHNOLOGY CO., LTD. Choose Achieve Chem for priority in quality, safety, and total cost of ownership, trusted by international brands as well.

Wrapping It Up!

Spray Drying provides a solid foundation for the production of instant coffee, combining quality, versatility, and efficiency. For multiple uses in the food industry, it has proven its efficiency in producing fine powder. This machine has been introduced as a technological milestone with the capacity to transform liquid slurry of different types into dry powder.

As the market has adopted this technology, the demand for high-quality, automatic, and convenient spray drying machines has surged. That's where. Contact us today to get your customized spray dryer and enhance the production of your products with high-quality materials and customization options.

Interested in a Spray Dryer for your instant coffee? [Send an Inquiry now]

Frequently Asked Questions

Ques 1. What to do if coffee powder gets Lumps and has poor solubility?

Ans: Firstly, check the atomization effect. It may be due to a worn-down pressure nozzle, which results in uneven droplets. Secondly, adjust the concentration of feed (too high to form dense particles). Using a well-built, high-quality machine can do these adjustments automatically.

 

Ques 2. The coffee spray drying machine is often blocked and has a maintenance problem?

Ans: From the start, ensure the regular cleaning or even cleaning of the machine after every batch to prevent the issue. Otherwise, opt for the automatic pressure nozzle machine that does cleaning through automation. For added safety, regularly check the nozzle aperture and clean any particles that may be stuck there to prevent downtime.

 

Ques 3. How to prevent the "burnt smell" from coffee powder?

Ans: To prevent this from happening, the control of drying temperature and droplet size is a must. This shortened drying time can be achieved using pressure nozzle equipment that reduces pressure, resulting in smaller droplets. It also reduces thermal degradation at an inlet air temperature of 160 °C.