Factors That Affect Sugar Crystallization

Crystallization is the process of solid crystals precipitating from a solution, either naturally or artificially. It's also a chemical solid-liquid separation process that involves the mass transfer of a solute from a liquid solution to a crystalline phase in the form of a solid. As a result, crystallization is a precipitation process resulting from a change in the solubility of the solute in the solvent. Nuclei creation and crystal development are the two key processes in the crystallization process. Alaqua is a processing equipment supplier for the evaporator, crystallizer, distillation equipment, spray dryer, heat exchanger, and solvent recovery systems.

Factors Affecting Sugar Crystallization

Crystallizing the sugar solution is required for manufacturing icings, frostings, or sweets such as fondant and fudge. Nuclei must develop in the fluid before crystallization can begin. Crystals are formed by adding solution material to these nuclei. The type of the crystallizing material, the concentration, temperature, agitation, and contaminants present in the solution all influence the rate of nuclei production and crystallization.

Nature of crystallizing substance

Some substances, such as salt, crystallize rapidly from a solution of water. Nuclear formation begins with only a small super-saturation, and any additional salt in the solution beyond the saturation threshold crystallizes. Some chemicals, such as salt, do not readily form nuclei or crystallize. When it comes to sucrose, a high level of supersaturation is frequently required before crystallization can begin. Compared to levulose, sucrose crystallizes faster.

Nuclei formation

A supersaturated solution is required for nuclei to form for crystallization to proceed. Several variables impact the nuclei creation process, which involves the joining of atoms to create nuclei. A few nuclei may develop spontaneously in various areas if a solution is permitted to stand, and crystallization proceeds from these nuclei. The crystals grow to a considerable size when just a few nuclei form spontaneously in the solution. In most cases, nucleus production and crystallization do not commence right after supersaturation. Specks of dust in the solution may help accelerate nuclear production. The pace of nuclear production is sped up by agitating or churning a solution. A decline in temperature encourages the creation of nuclei initially but eventually slows it down. Seeding a solution can be utilized to start crystallization instead of waiting for nuclei to develop spontaneously.

Seeding

Seeding is the technique of adding crystals of the same substance to start crystallization. These crystals act as nuclei for the formation of new crystals. If the number of crystals supplied is considerable but the size of the crystals is modest, the solution contains many nuclei and the resultant crystals are tiny. The nuclei generated are few in number and the crystals created are massive if the amount of material supplied is minimal. Many people believe that all crystals are large enough to be seen, however many are actually incredibly little, so small that they may float in the air. If crystals are floating in the air, they may act as seed solutions, causing crystallization to begin.

Rate of crystallization

New molecules from the solution are deposited in a regular sequence or way onto the nuclei generated in the solution, resulting in a characteristic shape for each crystal. A crystal's growth rate might differ depending on which side or face it is on. The rate of crystallization refers to how quickly nuclei expand in size. The concentration and temperature of the solution may promote this pace; foreign elements may slow it down.

Solution Concentration

The formation of nuclei is aided by a concentrated solution. 114°C fondant syrup cooked to 111°C has less water and is more concentrated. As a result, the one cooked to 114°C forms nuclei more easily. If the degree of supersaturation is not too considerable, large, well-shaped crystals form more easily. Supersaturation between 70° and 90°C is the most favorable for crystal formation in a sucrose solution cooked to 112°C. When the syrup is swirled at these temperatures, crystallization takes place in a relatively short period, but the crystals generated are bigger than when the syrup is cooled to a lower temperature. The growth of tiny crystals necessitates supersaturation and a low temperature.

Crystallization Temperature

It is a well-known fact that when chemical precipitates are crystallized at high temperatures, they tend to become more coarsely crystalline. This is how sugars work in general. Other factors being equal, the coarser the crystals created, the greater the temperature at which crystal formation takes place. A decline in temperature promotes the development of nuclei at first but later inhibits it. Chilling sugar syrups to a specific temperature promotes crystallization, whereas cooling to a lower temperature inhibits it. Because the viscosity of a saturated sugar solution increases when the temperature drops below 70°C, crystal formation slows as well.

Agitation

Stirring a solution promotes nuclei production while preventing the deposit of solution material on already formed nuclei. As a result, crystals in agitated solutions do not grow to the same size as crystals that form naturally. If tiny crystals are sought, the circumstances must allow for the formation of a large number of nuclei. If the syrup is agitated until the bulk is kneadable, small crystals can be formed in syrups of known concentration and temperature. Some nuclei are created when the syrup is churned for a brief period, but when the agitation is halted, the development of additional nuclei is discouraged, and crystal growth is encouraged. If tiny crystals are needed, it is critical to mix candy and frosting syrups until almost all of the material has crystallized. Large sugar crystals can develop when impurities in the sugar syrup are present. Impurities encourage the production of premature crystals, which can grow to be large and bothersome.

Interfering substances

Certain goods can be introduced to inhibit crystal formation and development. Interfering agents are things like cream, butter, and egg white. The agents cover the crystals and prevent huge crystals from forming. Boiling the sugar syrup to the correct temperature is very critical, as is ensuring that the sugar is completely dissolved.

Degree of inversion

Sweets with a high sugar content (sucrose) may crystallize during production or storage (commonly referred to as graining). Although this is beneficial in some items (such as fondant and fudge), it is seen as a quality flaw in most others. When a sugar solution is heated, a portion of the sucrose is converted to invert sugar. This inverted sugar prevents sucrose crystallization while also increasing the total sugar content in the mixture. However, because of this natural inversion process, it's impossible to predict how much-inverted sugar will be created. Certain substances, such as cream of tartar or citric acid, may be used to limit the amount of inversion. These additives speed up the conversion of sucrose to invert sugar, increasing the total proportion of invert sugar in the solution. Adding glucose syrup, which will immediately increase the quantity of inverted sugar in the mixture, is a more precise way of assuring the right balance of inverted sugar. The amount of inverted sugar in the sweet must be kept under control since too much will cause it to absorb water from the air and become sticky. If there isn't enough inverted sugar, the sucrose will crystallize. A non-crystalline product requires about 10-15% inverted sugar.

Added ingredients

The temperature of boiling can be influenced by the addition of specific components. When liquid milk is used to make toffees, for example, the moisture level of the mixture instantly increases, necessitating a longer boiling time to obtain the necessary moisture content. The shelf-life of the sweet is also affected by the additional additives. The viscosity of toffees, caramels, and fudges, which include milk solids and fat, is greater, which prevents crystallization. Fats, on the other hand, may cause the sweet to get rancid, reducing its shelf life.

Alaqua is processing equipment including crystallizers supplier in USA that also offers installation and commissioning, equipment fabrication, troubleshooting, personnel training, and various other services. Contact us today for processing equipment and their services!

Solvent Recovery at Pharmaceutical and Chemical Production Plants | Alaqua Inc

Solvent recovery systems are devices that recover and reuse solvents used in cannabis extraction. Chemical solvents are too expensive, especially in the commercial cannabis business. Due to the high cost of solvents, solvent recovery is an excellent way to save money. Hexane, butane, propane, ethanol, and isopropyl alcohol, among other solvents used in cannabis extraction, may be recycled and repurposed.

After the solvents have been utilized, they are collected and sorted using distillery processes. Special distillery tanks are used to heat and segregate solvents as they approach boiling and condense into vapor. The steam vapor is collected and transported to a condenser that is air-cooled. After cooling, the solvents cool to a clear liquid that may be reused.

When analyzing a pharmaceutical, chemical, petrochemical, or medical device manufacturing facility's overall efficiency and profitability, the recovery and reuse of solvents used in the manufacturing processes is an essential issue. Organic solvent recovery and reuse have two advantages: it saves money on waste disposal and it saves money on chemicals. In a solvent recovery systems application, distillation is one of the most frequent processes.

The concentration/recovery of residual pharmaceutical products from the column discharge stream is secondary to the recovery of solvents with distillation technology. The usual way for facilitating improved pharmaceutical product recovery rates is evaporation technology following the column.

Work of Solvent Recovery System

The solvent recovery systems work when distillation separates volatile and nonvolatile solutions in a solvent. The solution is boiled, and the vapors are then condensed back into liquid in a separate tank, similar to how a vapor degreaser works. Solvents and pollutants boil at different temperatures: oils and soils boil at much higher temperatures than solvents. Paint thinner, which is used to remove paint from paint guns and parts, is an excellent example of this; because the solvent boils at far lower temperatures than paint, boiling the combination separates the pure solvent from the paint sludge components in one tank.

Simple Solvent Recovery

A single organic solvent in a water matrix with no impurities is the most basic design. Acetone, isopropanol, methanol, ethanol, and hexane are all common solvent recovery compounds. Two pieces of trays or packing make up a solvent recovery column. Having a water matrix and a chemical with a lower boiling point than water, the bottom portion of the column (stripping section) would first separate the water matrix and the organic chemical, while the top section (rectification section) would concentrate the organic chemical. Common software simulation applications like CHEMCAD and HYSYS may be used to create this binary system.

Solvent Recovery with Multi-components

More than one organic compound will be recovered at the following system level. The organic compounds are usually recovered in one stream and the water in the other in this configuration. To separate the two organic solvents, a second column is required. The vapor/liquid equilibrium data for the majority of common organic solvents is well-documented, which is essential to accurately replicate the separation process. Any trace of contamination should prompt pilot testing of the design to confirm that it meets the separation criteria.

Additional Challenges in Solvent Recovery

Many facilities have many manufacturing lines that use various organic compounds. It is feasible to create strong solvent recovery systems that can work in a variety of configurations to make solvent recovery from diverse production lines easier. A pharmaceutical manufacturing plant, for example, featured changing streams of solvents in a water matrix. The boiling points of the solvents varied from above the boiling point of water in Line 1 to below the boiling point of water in Line 2. The streams from both lines were multi-component, which added to the complexity. The miscibility of certain streams when corrected or concentrated, and the immiscibility of others, added a third layer of complication.

The distillation system was designed using a normal path of initial simulation work to establish operating conditions within the column, such as liquid/vapor ratios, reflux ratios, and utility needs, among other things. Due to a lack of empirical data to forecast a distillation separation process with multiple components present, a test strategy for the various streams was necessary. There were feed points at the top, middle, and bottom of the column in this layout. A three-section decanter was utilized to account for the "immiscibility factor." The three portions ensured the separation of a stream with both a greater and lower specific gravity than water in the presence of immiscible components. The decanter acted as a condensate tank for the above stream in the case of miscible components.

The pilot test provided the final operating parameters, and the requisite empirical data was used to build a full-scale plant.

Conclusion

Each new system is designed by experienced distillation engineers who draw on their previous experiences. Only half of the design is concerned with separating solvents and water. Because distillation is a high-energy process, the whole system design must account for this. Some applications can benefit from the use of cascading pressure in a multi-effect distillation system. MVR (mechanical vapor recompression) can also help with system efficiency. When comparing designs from various distillation equipment vendors, the total efficiency of the process should be considered.

Alaqua is a solvent recovery systems and other processing equipment supplier worldwide based in the US. Along with supplying processing equipment, they also provide processing equipment services such as equipment fabrication, installation and commissioning, personnel training, field, retrofitting, and troubleshooting services. For any queries and information related to processing equipment and its services, contact them today! For more info visit on site - www.alaquainc.com

Important Qualities to Look for in Industrial Equipment Suppliers | Alaqua INC

Selecting industrial equipment suppliers is not an easy task, and for this various customers are looking for the factors to look for while searching for an industrial equipment supplier. When it comes to the price and convenience, we all get to decide about the qualities of industrial equipment suppliers. It is not just about the right selection, but it is about the return that the clients will receive through that industrial equipment such as evaporator system, crystallizer, spray dryer, solvent recovery systems, distillation system, and heat exchangers.

There are a lot of benefits of processing equipment suppliers as the supplier will not only provide you the machinery you need at a time but will also guide you for the services related to the processing equipment. When it comes to your operational goals, those equipment suppliers are going to help you a lot while applying their knowledge in unique operational goals, and they will, after all, be for the benefit of your processing equipment.

Goal-achieving behavior

Industrial or processing equipment suppliers should not be someone who knows about the industrial equipment but should be someone who is able to recommend the requirements for achieving the goal. The purpose is to get the most suitable suppliers for industry-related equipment, and not just the knowledge of the equipment but how the equipment can be used for the betterment of the machinery which can help in the completion of the task when it comes to goal-achieving performance.

Value

Price and worth are not synonymous. Of course, an honest price is crucial, but when a supplier can assist you to enhance product design, increase product quality, improve your speed market, or lower your total manufacturing cost, pricing becomes relative. The best option might not necessarily be the cheapest option. You will almost certainly spend more money in the long term if the supplier’s product quality is poor. Make sure to evaluate the supplier based on the complete value they contribute to the manufacturing process.

Stability

It’s critical to have a provider that can keep their word. You want to make sure the supplier is in the business for the long haul, especially if you’re establishing a long-term deal with them. Senior staff continuity, a credit check, years in the company, and references by customers can make you feel more secure in terms of the stability of your processing equipment supplier.

Location and Accessibility

Another most important quality when you’re looking for the perfect industrial equipment suppliers is location and accessibility. You can get things from anywhere in this global economy. Your company plan is almost certainly related to a timetable. How does it influence your success if all of their items come from overseas and there is a delay? You must ensure that your provider is capable of delivering on time and on budget. Inventory availability, domestic production, transportation capacity, and on-time performance are the qualities to look for.

Communication

Your supplier should not only be honest and direct but also responsive. You are dependent on your supplier for the safe production process. Consider how a supplier communicates and the accessibility of that communication, along with whether or not they have a support staff that can be reached through a phone and can communicate in a common language.

Production Capabilities

Is the supplier able to provide the goods you require? Visiting the supplier in person, or via a third-party agent representative is the most effective technique to verify manufacturing capabilities. The evaluation could be based on the following points:

• Raw materials and finished product inventory

• Procedures of incoming quality control, in-process quality control, and pre-shipment quality control

• Development and Designing capabilities

• Design change approach

• Equipment and machines maintenance

• Licensing and certifications

If you can’t visit the supplier in person, rely on certifications and third-party audits like the ISO 9001 to ensure that quality requirements are being met.

Also, request a product sample from your possible vendors. Request a sample run before mass production, especially if the item is being manufactured by your supplier.

Expertise in the Market

A supplier who understands your market and has technical competence in the product is extremely beneficial, from knowing the legal needs and regulations in your target market to troubleshooting during designing. You don’t want to be used as a test subject by a provider. Find a supplier who specializes in the product you’re looking for.

Alignment

It is possible that you will be working with your provider for quite some time. Hence, you want to be sure that you’ll be able to operate well together. You must have identical goals and ideals. You need to know that if something goes wrong, they’ll be there for you to help. Though you don’t have to go to work with them together every day like a coworker, you should have a positive and effective connection. A good equipment provider should be eager to work with you and prioritize your needs.

Suppliers may become partners while assisting in improving goods, increasing productivity, and ensuring a smooth manufacturing process. It will cost you money if you are associated with a bad provider. Take the time to properly examine your suppliers to ensure that they are a suitable fit for your company, both in terms of capabilities and culture.

When you work together you’ll have access to a manufacturer’s technical experience as well as world-class delivery performance.

Alaqua is processing equipment such as the evaporator, heat exchanger, spray dryer, solvent recovery, distillation equipment, and crystallizer supplier in the USA providing them for the Chemical, Environmental, Food, Pharmaceutical, and Power Generation industries. They also provide installation and commissioning services, field services, troubleshooting services, personnel training, equipment fabrication, and retrofitting services.

Alaqua is processing equipment such as evaporators supplier in the USA who also have experience in providing its services for caustic soda evaporation system, RO Reject & other salts evaporator/crystallizer systems, milk evaporator systems, sugar evaporators, pulp, and paper industry, MVR evaporator systems, MVR evaporators for the milk and dairy industry, pulp industry, corn products, and vegetable oils, sugar and salt, etc. They supply their processing recruitment worldwide. Visit them today to know more about their product and services! Site  - www.alaquainc.com

Crystallizers: Specification, Design, and Methods

 A crystallizer is processing equipment used to transform wastewater into solid crystals and pure water. Solid crystals are created from a liquid solution through crystallization, also known as a solid-liquid separation process. Liquid waste may be eliminated by crystallizers, resulting in Zero Liquid Discharge (ZLD). Primary nucleation and secondary nucleation are the two steps in the crystallization process. New crystals development is called primary nucleation. Secondary nucleation is the major stage that leads to the bulk formation of crystals and is what keeps growth going.

Specifications of Crystallizers

The selection of crystallizers necessitates an examination of the application requirements. A salt crystallizer, for example, treats wastewater to generate both solid salt crystals and clean water. A resin crystallizer allows flake or amorphous resin pellets to crystallize. To crystallize very viscous and slowly crystallizing fill masses, a vertical continuous cooling crystallizer (VCCC) is utilized. Other crystallizers tailored to specific applications are also available.

 

Crystallizers made in USA can be used alone or in conjunction with other technologies like a brine concentrator or an evaporator. Steam-driven evaporators evaporate water from a solution or slurry, but the output is still liquid rather than a crystal. A product is concentrated during evaporation by boiling the solvent, which is usually water. A brine concentrator is a type of evaporator majorly used to alter waste-saturated industrial effluent into distilled water that may be reused. A typical brine concentrator can reuse 95 to 99 percent of wastewater. When a plant's initial steam host fails, evaporators and crystallizers are frequently used to replace it.

There are four types of crystallizers equipment:

·         Crystallizers for bulk solutions. While nucleation and growth take place, crystals are suspended in solution for an extended period of time.

·         Vessels for accumulating precipitation. When feed streams enter the vessel, they quickly reach high degrees of supersaturation (due to chemical reactions, drowning, or salting-out), generating enormous quantities of tiny crystals.

·         Multiple crystals are formed when crystallizers are melted. The majority of the solution or melt (usually > 90%) crystallizes in suspension or on a cooled surface. The little quantity of uncrystallized mother liquor retains impurities.

·         Melt crystallizers produce massive single crystals of great purity. Large, pure, defect-free crystals develop slowly from high-purity melts. These are commonly utilized in the production of semiconductors.

All of these equipment has the following features in common:

·         Supersaturation is created in this area to drive crystallization.

·         For crystal growth, a zone is when crystals come into contact with the supersaturated solution. In certain conditions, crystals are suspended throughout the vessel by agitation; while in others, crystals occupy only a portion of the vessel, generally as a fluidized bed.

Selection/Design

The feed material available, the system parameters, and the customer's product needs will all influence which crystallizer is best for a given assignment. The following are examples of common design sequences:

·         Data collecting at its most basic level

·         Methods for generating supersaturation should be chosen carefully.

·         Batch or continuous operations are available.

·         Selection of a certain piece of equipment.

·         Tests on a bench and on a small scale.

·         Full-fledged design.

Supersaturation Generation

Supersaturation can be achieved in five ways:

·         Cooling can be accomplished by utilizing the vessel walls, internal coils, or by flowing mother liquid via an external heat exchanger. When the feed stream's solubility varies greatly with temperature and the feed stream is approaching saturation at a high temperature, this method is applied.

·         Evaporation, which is accomplished by heating the mother liquid or lowering the pressure in the vessel to create a boiling zone at the top. This may be utilized for a variety of systems, albeit it consumes more energy than cooling.

·         Reaction in which input streams enter and mix, resulting in a chemical reaction that produces the product, frequently at high supersaturation levels.

·         Drowning out occurs when a miscible solvent is introduced to a combination, resulting in a less soluble product. This is related to reaction crystallization.

·         Salting out is the process of removing a product from the solution by adding salt with a common ion. This has a lot in common with reaction crystallization.

Role of Crystallizers in Industrial Development & Manufacturing

Process robustness regulates process productivity and profitability. Crystallization is one of the most extensively utilized processes in the chemical industry. Crystallization is extensively used in the food and pharmaceutical industries for improved purification, separation, and solid form selection. For the creation of Active Pharmaceutical Ingredients (APIs), crystallization is the most prevalent method of forming pharmaceutical solids. The physical form influences the quality and efficiency of pharmacological products, thus optimizing particulate qualities such as particle size and shape distributions is critical.

Many pharmaceutical medicines have poor physiochemical characteristics, such as low biological fluid solubility. To facilitate the production of Active Pharmaceutical Ingredients (APIs), significant research and development efforts have been undertaken to establish a solid form landscape that encompasses all potential solid structures, including solvates, polymorphs, salts, co-crystals, and the amorphous phase.

Crystallization Methods

In chemical engineering terms, crystallization is the earliest "unit operation." Sodium chloride, for example, has been created in this manner since the dawn of civilization.

There are several conventional crystallization processes, each with its own set of advantages and disadvantages. The procedure used must be based on the qualities of the crystallizing substance.

·         Solvent Evaporation: Solvent evaporation is simple to set up, needs air-tight samples, and only a small amount of solvent to operate efficiently. A particular amount of material is required.

·         Slow cooling: It necessitates solvents with low boiling points and modest solute solubility. A particular amount of material is required.

·         Solvent/Vapour Diffusion: It works well with modest quantities of material, although it can be difficult to locate two acceptable solvents. It is possible to "oil out."

·         Sublimation: It isn't the best way to make diffraction-quality crystals. Usually done at high temperatures, which causes crystals to develop too fast.

Sonocrystallization

Although crystallization processes can be difficult to manage, sonocrystallization is a more recent type of crystallization that has several advantages over previous approaches. The development, growth, and collapse of bubbles are known to cause acoustic cavitation in liquids. The collapse of the bubble gives enough energy to speed up the nucleation process. This produces crystallizations that are very reproducible and predictable, as well as a number of other advantages.

·         Induction times are shorter.

·         Metastable zone width (MSZW) decrease.

·         Nucleation rate has sped up.

·         Crystal growth speed has increased.

·         Agglomeration should be minimized as much as possible.

·         Crystal size distribution that is tailored to the individual

Crystallizers can be used to recover salts from wastewater, which can subsequently be utilized or sold. A crystallizer increases waste stream utilization and assists facilities in meeting zero liquid discharge (ZLD) standards in this way. Crystallizers supplier in USA supply it to be utilized by a variety of industries, including manufacturing, chemical processing, mining, petrochemical refining, and electric component manufacture.

 

Alaqua is processing equipment such as the evaporator, solvent recovery, distillation, spray dryer, heat exchanger, and crystallizer supplier in USA that fulfills various industrial requirements. We also provide troubleshooting, personnel training, installation and commissioning, retrofitting, and other services for processing equipment. Connect with us to know more!

What is the role of a crystallizer?

 A crystallizer is heating equipment that transforms amorphous PET into a semi-crystalline state from virgin, post-process, or scrap PET.

Processors who produce or use considerable amounts of scrap or recycled PET material need crystallizers. Because processing converts virgin PET to amorphous PET, which cannot be reprocessed in high concentrations, those who must re-use this material has only two choices:

• Process a small percentage of amorphous PET regrind (10% or less) with virgin PET, or blend a small percentage of amorphous PET regrind (10% or less) with virgin PET before processing.
• Using a crystallizer, “re-crystallize” the amorphous PET regrind to a semi-crystalline form (similar to virgin PET).

What is the function of a crystallizer?

A crystallizer raises the temperature of granulated amorphous PET to slightly below its melting point, but above its glass transition temperature. When heated PET reaches its "crystallization" temperature, the amorphous PET molecules rapidly change state: Crystalline structures develop and align inside the molecules, and the material transitions from an amorphous to a semi-crystalline state.

When the transformation is complete, the “crystallized” PET is ready for drying (if necessary) and processing in the same way that virgin PET is. When amorphous materials are heated during drying, they tend to clump together since they haven't crystallized. Several issues arise from agglomerated materials: 1) They cause insufficient residence time for some materials by disrupting smooth mass flow through a drying hopper. 2) Agglomerated clumps are difficult to dry because of their huge size, and they are more prone to retain moisture than is desirable. 3) Agglomerated clumps can become caught or bridged in downstream processes, resulting in a slew of other material handling problems.

Depending on the capabilities of your crystallizer equipment, crystallization can be done in a continuous or batch process. Crystallizers are typically sized according to the amount of material that can be crystallized in an hour.

What are the types of crystallizers?

Majorly the crystallizers are of two types mentioned below:

1. Hot-air hopper Crystallizers
2. Infrared Drum (IRD) Crystallizers

1.      Hot-air hopper Crystallizers

The crystallizers are similar to dryers in many ways: Material is fed into a hopper, heated to a precise temperature with warmed air, and then discharged into a downstream process. A hopper-type crystallizer and a dryer, on the other hand, have numerous key functional differences:

·         Crystallizers use ambient air: In an open-loop crystallizer, heated ambient air is used, rather than dry/desiccated air in a closed-loop system (however, closed-loop systems are available). While some drying may occur as a result of the heating and crystallization process, crystallization does not provide the same level of moisture control as drying. If the recrystallized PET is still damp, it must be thoroughly dried before use.

·         Crystallizer hoppers use an agitator: Mechanical agitation is required within the hopper to keep amorphous PET material moving, break up clumps, and ensure that it flows easily before and after the crystallization process because it can become sticky as it is heated to its crystallization temperature.

2.      Infrared Drum (IRD) Crystallizers

Infrared Drum (IRD) crystallizers are distinguished from hopper-type crystallizers in a number of ways:

·         Infrared Heat Source: An infrared emitter, located in the drum's middle heats material directly as it rotates in the drum, eliminating the need to inject heated air.

·         Rotating Horizontal Drum: Instead of a vertical hopper, the IRD employs a horizontal rotating drum. Slow, continuous rotation reduces clumping, ensures complete material mixing, and removes the need for the agitator found in traditional vertical crystallizer hoppers.

·         Can Simultaneously Crystallize and Dry: The powerful infrared source heats pellets more quickly, causing moisture to rise to the top and be transported away by a steady stream of cool, ambient air. While IRD crystallizers can remove 90% or more of the moisture from a material, which is a far larger percentage than hopper-type crystallizers, they can't give the precision moisture removal that a specialized desiccant dryer can.

 

Alaqua is the best crystallizer supplier in USA along with other processing equipment such as the evaporator, solvent recovery, and other equipment to serve various industrial requirements. Alaqua supplies processing equipment such as crystallizers made in the USA worldwide for various food processing, pharmaceutical, and various chemical industries. To know more contact us today!