How Does a Liquid ring vacuum pumps Work

How to reduce the vacuum pump energy consumption?

When we choose a vacuum pump, we should not only consider its quality and efficiency, but also consider whether the energy consumption is high or not. Generally, we will choose the one that is more energy saving. How to reduce the energy consumption? Xiaobian teach you a few simple and feasible methods.

How to reduce the vacuum pump energy consumption?

1 reasonable selection of vacuum pump materials
Considering that the operating life of the vacuum unit can be maintained for more than 6 years, low-price and easy to be cast should be selected as far as possible. For corrosive liquid and other media, anti-corrosion of over-current parts and stainless steel materials can be selected. Of course, the specific selection should be combined with the actual needs of the industry.
2 reasonably determine the output of the vacuum pump
First of all, it is necessary to find out the resistance of all levels of vacuum pump system and eliminate the abnormal phenomenon of excessive resistance. Secondly, it considers the maximum pumping capacity under the influence of all kinds of adverse factors, and determines the safe and economical system pressure according to the operation requirements. Finally, according to the total pumping capacity of the vacuum unit to transform the output configuration, to ensure the safety of the premise, so that the system in the medium-speed operation, the operating conditions required by the vacuum degree and pumping capacity and the efficiency of the vacuum pump match.
3. Properly use the pipeline
The reliable and efficient pipeline is selected by the method of close cooperation between theoretical calculation and model experiment, and the vacuum degree of the working condition is guaranteed under the condition of possible low air extraction.
Maximize the potential of the motor
Saving energy is what we all want, after knowing how to make the vacuum pump reduce energy consumption of the knowledge, in the use of it in the future will be more satisfied.

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Vacuum pump selection problem

Vacuum pump is the key equipment in the process of vacuum drying. The selection of vacuum pump type should consider whether it is suitable for the field production process.
The power transformer drying process is actually a dehumidification process, there is a large amount of water vapor to vent, so the selection of the former pump to be able to withstand the higher partial pressure of water vapor, such as the use of rotary vane pump or water ring pump.
But the general large power transformer (voltage grade 110kV and above) in the drying vacuum tank system the limit vacuum requirements in 1OPa, water ring pump plus a roots booster pump are far from meeting the requirements (let alone consider the system leakage).
Introduced the present domestic equipment and imported by the single-stage rotary vane vacuum pump (with gas ballast valve) can be up to 50 pa limit vacuum (domestic single-stage rotary vane pump can achieve even 10 pa, but performance has certain gap with imported), coupled with the level of roots pump, vacuum degree can be improved at least under 10 pa (considering system leakage rate of pressure rise within l0h no greater than 93 pa).
Therefore, now the transformer vacuum drying equipment tend to choose rotary vane vacuum pump as the front vacuum pump.
At the same time, there is a large amount of water mixed in the pumping medium. According to the saturation vapor pressure curve of water, when the pump temperature reaches 60, the saturation vapor pressure of water can reach 19.8kpa. This partial pressure affects the ultimate vacuum of the pump.
If the use of ballast pump, it can suck water vapor, but its maximum inlet pressure (partial pressure of water vapor) and pump volume and pump temperature.
In the case of a certain degree of vacuum, the higher the temperature, the more volatile water, liquid to the pump oil in the water is very little.
Therefore, operating the vacuum pump at the highest temperature is an effective way to ensure that the vacuum pump can reduce oil emulsification and obtain a high vacuum.
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Influence vacuum pump vacuum degree of seven factors

1, the vacuum pump blade wear, and the cylinder body conflict between the contact surface can not be large, resulting in a lack of vacuum.
2, cylinder body wear, cylinder wall may appear wear, resulting in a lack of vacuum.
3. Rotor displacement. The standard installation position of rotor and end cover is offset, resulting in insufficient vacuum.
4, vacuum pump leakage, vacuum pump at the beginning and end of a long time after the use of the seal gasket aging caused vacuum pump leakage, resulting in insufficient vacuum.

5. Whether the motor is normal. Motor speed is not normal pumping speed will slow down, resulting in a lack of vacuum.
6, vacuum pump oil emulsification, carbonization. Vacuum pump in the long-term use of the process is not usually replaced and artificial conditioning, vacuum pump oil will produce emulsification or carbonization phenomenon, resulting in the vacuum pump cylinder wear, tubing congestion, oil filter congestion and a series of problems.
7, vacuum pump oil filter congestion or damage. Vacuum pump oil filter is also called oil mist separator, oil filter, exhaust filter, etc., if the oil mist separator produces congestion, the gas pumped into the pump body will not be easily removed, at this time the pump internal pressure is too high, pumping speed is reduced, the vacuum degree drops.

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Vacuum pump in general industry application

Application of vacuum pump in general industry: central vacuum treatment system, compressed air regeneration, vacuum cleaner, lifting and fixing position, vacuum degassing, vacuum milking, ozone production, brick factory.
Vacuum pump application
Central vacuum processing system
The VOLM vacuum pump vacuums the tank so that any suction required in the process can be achieved through the vacuum tank. All vacuum suction points are connected to the tank through a common master tube. Widely used in electronic device manufacturers, tape manufacturers and hospitals.
Compressed air regeneration
Inhaled gas driers require periodic regeneration, which usually requires about 15% of compressed air to blow off. When the VOLM vacuum pump is used, the amount of compressed air blown can be reduced from 15% to 5%, so that 10% more compressed air can be produced. It can be used in all industries that need a lot of compressed air, such as pulp mills, steel mills, chemical plants and glass production.
Vacuum cleaner
The vacuum cleaner forces water through the fabric and extracts dirt from the fabric. Vacuum extraction forces saturated air through the fabric to remove moisture from the fabric (water molecules are in between the fibers due to surface tension). Can reduce energy consumption, reduce the consumption of raw materials, improve product quality. Can be used for cleaning carpets and various fabrics.
Lift and fix position
Vacuum can be used to lift the object during handling, and vacuum can also be used to fix the object during processing. Compared with dry vacuum pump, VOLM liquid ring vacuum pump can improve efficiency and significantly reduce maintenance cost.
Vacuum degassing
In some manufacturing processes, the liquid is degassed before it is processed. If the required pressure exceeds the cavitation limit of the pump body, an injector shall be added as a secondary vacuum pumping device. Some systems do not use ejectors. The VOLM liquid ring vacuum pump can be used to replace the rotary vane pump in bottling plants. Degassing of molten steel is required in the production of high quality steel.
Vacuum milking
The VOLM liquid ring vacuum pump comprises a central vacuum system for milking cows. The VOLM liquid ring pump replaces the vane pump to improve operational reliability, 100% oil free and reduce environmental pollution.
Ozone production
Use VOLM liquid ring compressor to extract oxygen or air to 20-30pls. It then passes through the cooler and dryer into the ozone generator, and the ozone produced leaves the tank for various treatment processes. Ozone can be used for the final disinfection of drinking water in water plants and the removal of metal ions, paper bleaching, clay such as kaolin decolorization.

How to choose a vacuum pump?
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Main purpose of vacuum pump

Oil - free rotary vane vacuum pump is a rotary vane single - stage vacuum pump. A basic device for extracting gases from a sealed container to obtain a vacuum.
The pump can be used for air conditioning, refrigeration equipment repair, medical equipment suction device, printing machinery, vacuum packaging, vacuum plastic, physical and chemical experiments and the need for a vacuum environment of small devices and other vacuum operations. It can also be used as a small oil booster pump, oil diffusion pump, molecular pump, etc.
The pump is not suitable for removing corrosive to ferrous metals, chemical reactions to pump oil, gas containing dust particles, as well as high oxygen content, there are explosive toxic gas. It cannot be used as a transfer pump (that is, pumping from one container to another).
ZJY series with the overflow valve roots pump is widely used in all aspects of the vacuum, it extends the mechanical vacuum pump oil seal in the lower inlet pressure under the scope of work, has the characteristics of small size large pumping speed, within the scope of 1 ~ 100 pa inlet pressure with large pumping speed, particularly suited to low inlet pressure need large pumping speed of vacuum system in use, such as power transformer, electric power capacitor, vacuum drying, vacuum impregnating process of electric power transformer, vacuum heat treatment, vacuum smelting of for exhaust, vacuum coating equipment, large-scale test of wind tunnel suction and exhaust lighting production line, and so on. If the selection of appropriate pre-pump, roots pump can also be used in food, chemical, pharmaceutical, textile and other industries in the vacuum distillation, concentration, drying and other processes have been widely used.
The main purpose
2X series rotary vane vacuum pumps are widely used in vacuum metallurgy, vacuum drying, military industry, electronics, chemical industry, light industry, petroleum, medicine and other production and scientific research departments.
Product features
1, 2X rotary vane vacuum pump is an oil-sealed mechanical vacuum pump, the total compression ratio by two to burden, thus improving the ultimate vacuum
2. The vacuum pump oil in the oil tank can prevent the air from entering the pump chamber through the exhaust valve, and the pump oil can play a role of lubrication
3, the pump installed gas valve, can effectively remove the vapor in the exhaust gas, thus extending the service life.
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