Liquid ring vacuum pump is a rotary positive displacement pump that can provide process vacuum in various industrial applications, such as chemical, power, environmental protection, food and beverage processing and packaging, shipbuilding, mining, oil and gas, pharmaceutical, pulp and paper, and textile industries. Liquid ring vacuum pumps use water or other compatible process liquids as sealing liquids. The liquid ring vacuum pump is easy to operate and has no contact parts, making it a safe and reliable choice for handling dirty and potentially hazardous gases. The liquid ring pump has two designs: single-stage and two-stage, and can also be configured as a compressor to achieve more uses.
Working principle of liquid ring vacuum pump
When the impeller rotates, the sealing liquid forms a ring inside the pump body, thereby forming many small chambers for capturing gas. The rotor shaft is eccentric relative to the pump body, so that the liquid is almost filled, and then during a single rotation, almost every rotor chamber is emptied, forming gas compression that produces a pumping effect. The vacuum inlet and atmospheric outlet provide a flow path for the processed gas mixture. The compression heat of the gas is dissipated into the sealing liquid, and a portion of the liquid flows out and is discharged. The exhaust gas and residual water are separated from the airflow and directly directed towards the indoor exhaust gas, and then returned to the pump separately. The sealing liquid is replaced by the continuously flowing sealing liquid of the cooler.
Structure and advantages of liquid ring vacuum pump
1. The technology behind the liquid ring vacuum pump
The design technology behind the liquid ring vacuum pump is advanced, providing better and more reliable performance that meets strict requirements in harsh industrial environments. Liquid ring vacuum pump is an economical and practical engineering solution that can meet specific customer requirements.
2. Steam condensation expandable capacity
Dry air or dry gas mixture is compressed from vacuum to atmospheric pressure in a liquid ring pump, which is similar to any other volumetric pump, except that the temperature rise of the airflow passing through the pump is relatively small.
The characteristics of humid air or gas mixtures containing condensable vapors vary greatly. When cooled with a lower temperature sealing liquid, some of the steam entering the liquid ring pump will condense. The condensate is mixed with the sealing liquid. Now, compared to its original volume size (when it was a component of the intake flow), it occupies significantly less space. This reduction in volume becomes a form of capacity expansion.
• It can be condensed as early as possible to avoid steam compression, which helps increase the intake volume. In each rotor cavity, condensation must occur before the rotor cavity passes through its inlet. Any condensation that occurs after cutting off will not affect the intake volume of the pump.
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The liquid ring vacuum pump can process a large amount of liquid through its inlet, while the reduction in gas capacity can be ignored. In order to greatly increase condensation, some liquid is often sprayed into the inlet pipe upstream of the vacuum pump itself.
3. Global suppliers
NASH has over 110 years of rich experience, and NASH certified experts provide after-sales support at any time, including maintenance, service, spare parts, and repairs. Our service centers are located worldwide, ensuring the safety of your vacuum system and providing high-quality, reliable, and efficient solutions.