Application of Screw Vacuum Pumps in Solvent Recovery

-

 

 Solvent recovery is a critical process in industries such as chemical, pharmaceutical, petrochemical, and environmental protection. It involves recovering solvents from process streams or waste products for reuse, which helps in reducing costs and minimizing environmental impact. Screw vacuum pumps have become a preferred choice in solvent recovery systems due to their reliability, efficiency, and ability to handle various types of gases and vapors. This article discusses the application of screw vacuum pumps in solvent recovery,

In the production of active pharmaceutical ingredients (APIs), the solvent crystallization process involves several critical steps: filtration, washing, and vacuum drying after crystallization. The moisture content of the material is generally around 20%, and the drying temperature should not exceed 80°C. After drying, the moisture content of the API must be reduced to below 0.5%. To remove the solvent from the material effectively, the pressure inside the drying chamber must be lower than the solvent's saturation vapor pressure at the drying temperature. Typically, this requires drying under medium vacuum pressures ranging from 0.1 to 50 Pa.

The solvents carried by the wet materials are often hazardous chemicals that are flammable, explosive, toxic, or harmful. During the drying process, these solvents are removed by the vacuum system.

Traditional Wet Vacuum Systems: Challenges in Solvent Recovery

Conventional wet vacuum systems commonly use a combination of Roots vacuum pumps and liquid ring pumps. However, liquid ring pumps utilize a sealing liquid that can dissolve or absorb a portion of the organic solvent during operation. This results in the solvent being separated into waste gas and high-concentration organic waste liquid in the gas-liquid separator tank. Both of these waste products require further treatment. This not only prevents full recovery of the solvent but also increases operational costs for the enterprise. Moreover, it poses significant health, safety, and environmental risks.

Dry Vacuum Systems with Screw Vacuum Pumps: A Superior Solution

In contrast, using a dry vacuum system consisting of a Roots pump and a screw vacuum pump allows the organic solvent to condense on the exhaust side during the drying process, enabling solvent recovery. Screw vacuum pumps offer several distinct advantages:

  1. No Use of Process Medium in the Pump Chamber: The screw vacuum pump operates without any process medium in the pump chamber, making it more energy-efficient and environmentally friendly. Unlike liquid ring pumps, there are no issues with waste liquid treatment, and the solvent can be entirely recovered.

  2. Energy Efficiency and Environmental Protection: The absence of any sealing or working fluid means that the screw vacuum pump eliminates the risk of solvent contamination and significantly reduces the need for additional waste treatment processes. This translates to lower operating costs and a safer working environment.

  3. Complete Solvent Recovery: Since the screw vacuum pump allows for solvent condensation and recovery at the exhaust side, the recovered solvent is pure and can be reused in the process. This not only maximizes the use of resources but also minimizes waste and environmental impact.

Due to these benefits, screw vacuum pumps have become the preferred choice in applications involving solvent recovery during the drying process of pharmaceutical raw materials. They provide an effective solution for handling hazardous solvents, ensuring energy efficiency, safety, and environmental compliance.

Contact us 

For more information about Application of Screw Vacuum Pumps in Solvent Recovery, contact Nuoxutech at contact@nuoxutech.com or visit our website www.nuoxutech.com .You can also reach us on WhatsApp at +86 13849062209.Our team is ready to provide you with professional service and support.

Keywords:nuoxutech,dry screw,Screw vacuum pump, solvent recovery, vacuum drying, pharmaceutical industry, dry vacuum system

 


Comments

Post a Comment

Popular posts from this blog

The Characteristics of 2BV Liquid Ring Vacuum Pump

-
Image
NuoxuTech proudly presents the 2BV liquid ring vacuum pump, revolutionizing performance and versatility compared to SIHI LEM/LELC models. As a leader in industrial solutions, NuoxuTech continues to innovate with advanced technologies tailored to meet the evolving needs of various industries.   2BV VS SIHI LEM/LELC Key Characteristics of the 2BV Series: Expanded Model Range:   NuoxuTech offers a comprehensive range of models, including the 2BV5-161 and 2BV6-161, providing superior capacity compared to SIHI LEM pumps. Material Options:   Choose from multiple material options to suit diverse working environments: A. Cast iron material with stainless steel 304 impeller B. All stainless steel 304 material C. All stainless steel 316L material Compact Design:   The 2BV2 and 2BV5 models feature a bracket-free design, optimizing space utilization and streamlining assembly. Ease of Maintenance:   With the 2BV pump, the shaft remains isolated from the medium, facilitating hassle-free maintena
Read more

ZJP Series Roots Vacuum Pumps in the Chemical and Pharmaceutical Industries

-
Image
 In the highly demanding environments of the chemical and pharmaceutical industries, the need for reliable and efficient vacuum solutions is paramount. The ZJP Series Roots Vacuum Pumps from NuoXuTech are designed to meet these stringent requirements, offering robust performance and superior efficiency. This article delves into the applications, benefits, and technical specifications of the ZJP Series Roots Vacuum Pumps in these critical industries.   The Importance of Vacuum Technology in Chemical and Pharmaceutical Industries Vacuum technology is essential in various processes within the chemical and pharmaceutical industries, including distillation, drying, crystallization, and filtration. These processes often require precise control of vacuum levels to ensure product quality, safety, and process efficiency. Applications of ZJP Series Roots Vacuum Pumps 1. Distillation: Vacuum Level: Achieving high vacuum levels is crucial in distillation processes to lower the boiling point of su
Read more

Liquid Ring Vacuum Pumps Maintenance Guide

-
  Liquid ring vacuum pumps Maintenance Guide Maintaining Liquid ring vacuum pumps is an essential practice to ensure their long-term functionality and efficiency. In operating environments where these pumps are crucial, a systematic approach to maintenance can prevent unexpected downtime and costly repairs. Proper maintenance involves several key steps that you should carry out regularly. Regular Inspection Frequent visual inspections can help identify any irregularities or signs of wear and tear. Check for leaks, abnormal noises, or vibrations, as these may indicate issues such as seal failure or misalignment. Seal Integrity Seals are critical to the proper functioning of Liquid ring vacuum pumps. Inspect the seals periodically for any evidence of deterioration or leaks, and replace them according to the manufacturer’s recommendations or sooner if you notice damage. Bearing Lubrication Bearings are integral to the smooth operation of Li
Read more