How to Choose the Right Wiped Film Evaporator for Solvent Recovery

The choice of the appropriate wiped film evaporator is a very critical decision that affects your performance and operational efficiency, purity of the solvent, and the overall achievement of capital expenditure. The optimum system should offer a balance between thermal sensitivity and throughput especially in such demanding applications like pharmaceutical API concentration and high-value specialty chemistry purification.

Having sold over 10,000 systems to the world, YHCHEM is well aware that there cannot exist two issues of separation that could be compared. The following figure represents a roadmap of the four main points that you must consider in an endeavor to arrive at a sure decision of the system that will offer you repeatable performance and a clear ROI.

Learn Your Thermal Boundaries and Feedstock

The initial process in the selection would be to define your feedstock in a holistic way. Does that process thermally labile compounds? The brief cycle of a wiped film evaporator makes it suitable to the heat-sensitive products including cannabinoids, vitamins or even certain intermediates of drugs.

However, not all short-path systems perform equally. The experiments have demonstrated that the wiper speed and temperature require special attention when processing the viscous materials or materials that foul. As an example, it has been shown that in most instances, thermic fluid temperature is by far the most statistically significant variable with regards to the determination of the quality of the recovered solvent . In cases where your stream has components with high boiling points then you will need an evaporator that is designed to be allowed to operate at deep vacuum pressure to lower the boiling points and therefore to prevent thermal degradation. The modular flexibility in the outlines of the YHCHEM enables the accurate setting to an exact viscosity and thermal limits of your process in a way that your recovery percentages in the solvent are good and do not affect the quality.

Evaluate Mechanical Design: Wipers, Residence Time, and Materials

The extent of uniformity of your product on the heating surface is defined by the mechanical arrangement of your wiper system. A thin and turbulent coating improves the process of heat transfer and decreases the time that the product is in the hot region. Roller wipers generally have small residence times in comparison with comb wipers, which can be a decisive factor in the handling of the most delicate molecules.

Moreover, construction materials should meet your compliance goals in terms of chemical compatibility and construction industry standards. Glass is also applied in the lab and R&D to have the entire visibility, but stainless steel and alloy are employed in mass production and compatibility with chemicals. Since it is a nationally acclaimed High-Tech Enterprise, utilizing solid design engineering and offering products which are CE and UL compliant, so that your equipment will not fall short of the high grade of safety and quality, be it a glass laboratory unit or a high-throughput industrial skid.

Match Scale and Throughput to Your Operational Goals

Depending on whether you are operating at the lab level, pilot level or the industrial level, will highly influence your choice. An evaporator surface area of approximately 1000 cm² is perfect in R&D work and small batch processing. But when you want to maximize solvent recycling with a large volume waste stream, you must have a system that has the capacity of high rates of evaporation, over 95 percent.

YHCHEM offers a wide range of portfolio. YHCHEM has a philosophy of modular design that allows YHCHEM to be designed in a flexible way in which you can begin with a pilot unit then scale up to industrial production with scale-up properties that can be predicted. YHCHEM is experts at the drawing of lines that work, you will have one that is efficient and at the same time is not so vast that it holds no room to expand in future.

Prioritize Safety, Certifications, and Long-Term Support

There are some risks involved with Solvent recovery process which include manipulation of explosive or dangerous materials. It should be able to operate your equipment high temperature and vacuum. It is noteworthy, a high-integrity vacuum system is vital and not only maintains sensitive compounds, but also reduces the energy consumption, by permitting low-temperature evaporation.

Moreover, collaboration with a certified manufacturer eliminates the risk in the long-term perspective. YHCHEM is ISO 9001 (Quality), ISO 14001 (Environment) and ISO 45001 (health and safety) certified. YHCHEM also works with such top organizations as Chinese Academy of Sciences in order to remain on the top of process engineering. Such dedication to certification and constant improvement will guarantee that your investment will be secured by a stable support system and equipment of international standards.

The selection of an appropriate wiped film evaporator is an issue of matching mechanical design with chemical reality. With your material properties, desired throughput and safety needs in mind, you will be able to pick a system to guarantee efficient and repeatable solvent recovery over the next few years.