Pump-Assisted Degassing Tower Two-Stage Vacuum System
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Solution Overview
Problem
Existing vacuum degassing tower systems require high motor power and large volumes of circulating water, leading to excessive load and efficiency loss in pump blades, due to the use of two single-stage water-sealed vacuum pumps.
Innovation Solution
A pump-assisted degassing system comprising a vacuum pump, a gas-liquid separator, and a booster pump, where the booster pump assists the vacuum pump, reducing the need for large volumes of circulating water and motor power, and incorporating a two-stage pumping mechanism to share the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If two single-stage water-sealed vacuum pumps are used in combination, then the gas-liquid mixture can be pumped out from the degassing tower, but the motor power requirement becomes excessive (about 75 HP each) and the circulating water volume becomes large (about 120 LPM each)
Solution Approach 1:
The patent divides the single-stage vacuum pumping system into two separate stages: a booster pump stage and a vacuum pump stage. The booster pump handles the initial gas-liquid separation with lower power requirements, while the vacuum pump completes the vacuum degassing process. This segmentation allows each pump to operate at optimal efficiency points with reduced power consumption compared to using two single-stage pumps.
Solution Approach 2:
The gas-liquid separator acts as an intermediary device between the booster pump and the vacuum pump. It separates the gas-liquid mixture into gas and liquid phases, allowing the vacuum pump to process only the gas phase, thereby reducing the load and power requirements of the vacuum pump while maintaining effective degassing performance.
2Reliability
If two single-stage water-sealed vacuum pumps are used, then the degassing function is achieved, but the circulating water volume becomes excessive (about 120 LPM per pump)
Solution Approach 1:
The patent segments the water consumption into two functional parts: the booster pump uses a smaller amount of circulating water for initial gas-liquid separation, and the vacuum pump uses minimal water for maintaining vacuum conditions. This segmentation significantly reduces the total circulating water volume compared to using two single-stage water-sealed vacuum pumps that each require 120 LPM.
3Productivity
If two single-stage vacuum pumps with large volume are used, then the pumping capacity is sufficient, but the equipment volume and installation space become large
Solution Approach 1:
The patent segments the pumping function into two smaller, more compact units (booster pump and vacuum pump) that can be arranged vertically or in close proximity. The gas-liquid separator is positioned between them, creating a compact multi-stage system that achieves the same pumping capacity as two large single-stage pumps but with significantly reduced overall equipment volume and installation space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves a 45% to 50% reduction in electricity consumption, requires only one vacuum pump, and reduces the volume of circulating cooling water by 50% to 60%, lowering equipment load and blade efficiency loss.
Implementation Method 1
The vacuum degassing tower system is equipped with a liquid-sealed vacuum pump (vacuum degree is about 25 ̃35 Torr)
Implementation Method 2
a gas-liquid separator, connected with the vacuum pump in a closed loop through a circulation pipeline, and configured to perform gas-liquid separation on the gas-liquid mixture
Data Source
AI summary
The present disclosure provides a pump-assisted degassing system, a vacuum degassing tower, and a water system having the same. The degassing system comprises a vacuum pump, connected with a degassing tower through a main pipeline, and configured to pump out a gas-liquid mixture from the degassing tower; a gas-liquid separator, connected with the vacuum pump in a closed loop through a circulation pipeline, and configured to perform gas-liquid separation on the gas-liquid mixture; and a booster pump, arranged on the main pipeline between the vacuum pump and the degassing tower, and configured to assist the vacuum pump to pump out the gas-liquid mixture. The vacuum pump and the booster pump constitute a two-stage pumping device. Only one vacuum pump is needed in the system, and the vacuum pump requires less circulating water and less motor power resulting in lower the equipment load loss in the operation efficiency.