Q1: Why choose a Vacuum Solvent Recovery System for Screw Pumps? What advantages does it have with different types of solvents?

A1: The core reasons why screw pumps become common in solvent recovery systems are clear. They have a simple mechanical structure, can pump gas continuously and stably, and are oil-free—no oil contamination at all.

Their advantages stand out even more when dealing with special solvents. It handles thick high-viscosity solvents, solvents with solid particles, hard-to-volatilize solvents, and solvents with frequent temperature changes easily.

Compared with traditional rotary vane pumps and oil-sealed pumps, its pressure and flow are more stable. Efficiency goes up, process safety is guaranteed, and the recovered products are purer too.

Q2: How does a screw pump perform in recovering different types of solvents? Is it highly adaptable?

A2: It adapts well to different solvents.

For non-polar organic solvents like acetone, ethanol, and dichloromethane, screw pumps already have good corrosion resistance. When made of corrosion-resistant materials, they pump these volatile solvents very stably—no need to worry about recovery efficiency.

For high-viscosity solvents such as lubricating oils and resin solvents, it has good fluidity, rarely clogs, and is highly adaptable.

For solvents with solid particles, like waste liquids containing fine particles, its mechanical seal design plus special materials can withstand particles, lowering the risk of pump clogging and damage.

Even if the solvent temperature fluctuates frequently, its design allows it to run stably within a certain temperature range—adaptability is excellent.

These features make it a top choice in many solvent recovery scenarios.

Q3: What key techniques should be focused on when commissioning a screw pump for solvent recovery in practice?

A3: There are several key technical points to keep an eye on.

Choose the right materials and do a good job in corrosion protection. Based on the chemical properties of the solvent, pick corrosion-resistant materials—stainless steel, ceramics, or plastic-coated ones all work—to ensure the equipment won’t be corroded.

Adjust the pressure properly. Set appropriate inlet and outlet pressures. Don’t let the equipment run overloaded; otherwise, it may break down or leak.

Control the temperature well. Monitor the solvent temperature and adjust the pump speed reasonably. Don’t let the temperature get too high, which could decompose the solvent or cause leakage.

Don’t slack off on seal commissioning. Tune the mechanical seal system properly to ensure no leakage. Also, adjust the seal’s lubrication method and materials according to the solvent’s characteristics.

Set the flow rate accurately. Determine the pumping speed based on recovery needs—pursue high efficiency without wasting electricity.

Manage vibration and noise too. Adjust the equipment’s support structure to reduce vibration and keep it running stably.

Keep up with safety measures. Install pressure relief valves, safety interlocks, and leakage detection devices to ensure safe operation.

When all these are carefully tuned, the screw pump can reach its maximum performance, and solvent recovery can be stable and efficient.

Q4: How to optimize the commissioning parameters of a screw pump for different solvents?

A4: The approach is clear—adjust based on the solvent’s characteristics.

For low-volatility, low-viscosity solvents like ethanol and acetone, you can increase the pumping speed appropriately to speed up recovery. But check if the seal is good and if condensation can keep up.

For high-viscosity solvents or those with solid particles, lower the pumping speed to avoid pump overload. At the same time, adjust the temperature to reduce the solvent’s viscosity and improve fluidity.

If the solvent is highly corrosive, first select corrosion-resistant materials. Then adjust the pump’s pressure points to ensure the system is tightly sealed and minimize leakage.

If the solvent temperature changes frequently, install a heat exchanger or temperature control system. Stabilize the operating temperature to prevent frequent viscosity fluctuations from affecting operation.

In short, adjust the speed, pressure, temperature, and seal parameters little by little according to the characteristics of different solvents. Keep adjusting until the best recovery effect is achieved.

Q5: What common difficulties are encountered during commissioning, and how to solve them?

A5: There are several common problems, and their corresponding solutions are clear.

Leakage—mostly caused by poor sealing or incorrect seal materials. Choose suitable seal materials, fasten the seal tightly, and add a leakage detection device to solve it.

Pump clogging or solid particle suction—adjust the inlet filter to prevent particles from entering the pump. If necessary, simplify the material pretreatment process.

Equipment overheating is also common—add a cooling device or lower the speed. Don’t let heat accumulate; otherwise, malfunctions may occur.

Corrosion damage—replace with corrosion-resistant materials and perform regular maintenance. Replace damaged parts promptly; don’t delay.

Excessive vibration and noise—strengthen the support structure and adjust the installation position and parameters. Keep the equipment running stably, and the problem will be solved.

In fact, as long as you monitor key parameters and adjust based on experience, all these commissioning problems can be fixed.

Q6: To summarize, what are the key points about the adaptability of screw pumps in recovering different solvents and their commissioning techniques?

A6: In terms of adaptability, screw pumps have obvious advantages. They are stable, resistant to high viscosity, have a simple structure, and cause no oil contamination—so they can be used in many solvent recovery cases. They handle volatile, viscous, and solid particle-containing solvents easily. As long as the right materials are selected and parameters are properly designed, their application range can be expanded further.

For commissioning techniques, the core is “adjust based on solvent characteristics”. Every step—from material selection, pressure and temperature control, to seal optimization and flow adjustment—must not be done randomly. Commission carefully, monitor parameters closely, and correct problems in time. This ensures efficient and safe recovery.

In short, with a scientific and reasonable commissioning plan, screw pumps can exert their maximum advantages. Providing enterprises with efficient and environmentally friendly solvent recovery solutions is totally achievable.