liquid ring compressor applications

The principle of the liquid ring compressor is that the impeller is eccentrically arranged in the cylinder and a certain amount of water or other liquid is introduced into the cylinder. When the impeller (rotor) rotates and reaches a certain speed, due to the centrifugal force, the liquid is thrown out, forming a liquid ring attached to the inner surface of the cylinder. A crescent cavity is formed between the impeller surface and the liquid ring, which is a number of chambers with different volumes (elementary volume).

The volume of each chamber increases and decreases periodically with the rotation of impeller. The end covers on both sides of the cylinder are correspondingly provided with suction and exhaust ports. In this way, the impeller can rotate once to realize the suction, compression, exhaust and possible expansion process in each unit volume. Gas discharge will bring out some liquid, so a certain amount of new liquid must be added at the suction port.

When the liquid ring compressor is working, the energy loss caused by the blade stirring the liquid is very large, almost equal to the work consumed by the compressed gas. Therefore, the efficiency of the liquid ring compressor is very low. Generally, the power consumption of vacuum pump is small, so liquid ring compressor is often used as vacuum pump. In order to avoid excessive hydraulic loss, the maximum peripheral speed of the outer edge of the working wheel is generally limited within 14-16 M / s, and the liquid with smaller viscosity is selected as far as possible.

The purpose of the vacuum compressor is mainly used in the occasions where vacuum pumping and compressed gas are needed. It is especially suitable for the extraction and compression of flammable and explosive gas and for the tight packing of down quilt, space quilt and pillow loose items. It can reduce the vacuum compressor unit and moisture-proof and dust-proof packaging space, and reduce the storage and transportation costs.


The characteristics of liquid ring compressor are simple structure, easy manufacture, simple operation, less vulnerable parts, less pulsation and noise of exhaust. In addition, the liquid has sufficient cooling effect and the end temperature of the compressed gas is very low, so the liquid ring compressor is suitable for compressing the gases that are easy to decompose under high temperature, such as acetylene, carbon sulfide, hydrogen sulfide, etc. Because the compression medium is not in direct contact with the cylinder, the liquid ring compressor is also particularly suitable for compression of highly corrosive gases (such as chlorine). In this case, a liquid that does not work with the compressed gas can be selected as the sealing liquid, such as concentrated sulfuric acid when compressing chlorine gas.

The liquid ring compressor is a robust and reliable solution for demanding process applications. Our compressors are designed to compress wet, saturated or dirty gases and have historically proven reliability in difficult conditions such as oil and gas, chemistry, steam recovery, etc. without downtime for maintenance or reconstruction. It can be used to replace sealing liquid when water is incompatible with process gas.

Our extensive compressor product range covers the better performance range of all liquid ring compressors in the world, and provides single-stage or two-stage compressors. By handling higher volumes with lower energy, our compressors reduce energy and operating costs.

The materials we use to make liquid ring compressors are gray cast iron (static parts) and spheroidal graphite (dynamic parts). You can also use different materials, such as cast steel or a combination of two castings.

liquid ring compressor application:

1. The sugar industry compresses carbon dioxide

2. Humidification equipment in processing plant, spinning plant, tobacco, etc.

3. Wastewater treatment plant for compressed and digested gas (methane)

4. Natural gas compression

5. In refineries and petrochemical plants, the mixture of hydrogen chloride (HCl), gasoline and butane vapor is used for compressed air.

6. In the chemical industry, the mixture of compressed air, hydrogen, toluene, saturated steam, sulfuric acid and acetylene steam

7. In food industry, winery, brewery, etc.

8. In clinic, hospital, sanatorium, etc.

Generally, low pressure air is required in all units.

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