Liquid ring vacuum pump and liquid ring compressor

The working principle of the liquid ring vacuum pump and the liquid ring compressor is exactly the same. The basic type and structure are also the same, but there are different places. In order to make everyone better distinguish the two products, the following article will explain in detail. There are five differences in the following:rotary-vane-vacuum-pumps

1, the impeller circumferential speed range is different
The peripheral speed of the impeller is mainly determined by the pressure difference between the suction chamber and the compression chamber. Since the suction pressure of the compressor is generally atmospheric pressure, and the discharge pressure of the vacuum pump is generally atmospheric pressure, the pressure difference of the compressor is large, and the required peripheral speed is also large. When the same water ring pump is used as a vacuum pump and when it is used as a compressor, the performance of the vacuum pump is different. When the vacuum pump is used as a compressor, the speed can be increased economically.

2, the optimal compression ratio range is different
The so-called optimal compression ratio, that is, the compression ratio at a higher efficiency. In general, the optimum compression ratio of a vacuum pump is higher than that of a compressor.

3, the shaft power is different
The same size of the water ring pump, the effective power when used as a compressor is larger than the vacuum pump, and the current peripheral speed of the impeller is generally selected according to the requirements of the vacuum pump, so that when used as a compressor, it is operated in an inefficient area. The required shaft power is even greater. Therefore, the power of the compressor is larger than that of the vacuum pump.piston-vacuum-pump-structure

4, the structure of the gas water separator is different
The gas-water separator of the vacuum pump is flat-topped, the overflow pipe is a common water pipe, and the top of the gas-water separator of the compressor is spherical, and the overflow pipe is controlled by a float regulating valve to prevent the water level from being below the overflow pipe. The compressed gas escapes, reducing gas pressure and effective gas volume.

5, the size of the vent hole is different
At the same size, the venting port of the compressor is smaller than that of the vacuum pump.rotary-vane-vacuum-pump-for-vacuum-coating

Water ring vacuum pump and rotary vane vacuum pump

Water ring vacuum pump and rotary vane vacuum pump are commonly used in industry, and they have similarities in some fields, so people can not choose their own products. But after understanding the difference between the two, it is helpful for us to choose and buy. The main differences between them are as follows:

1. water ring vacuum pump working process:

It needs external cooling water in its working process. The process of working medium transferring energy is as follows: in the process of suction, working medium increases the speed of movement (thus gaining kinetic energy from impeller) driven by impeller, flows out from impeller, and sucks gas from suction port; in the process of compression, working medium velocity decreases, and returns to impeller, pressure rises, and gas is absorbed. Compressed. It can be seen that during the whole working process, the working medium receives the mechanical energy from the impeller and converts it into its own liquid kinetic energy, then the liquid kinetic energy is converted into the pressure energy of the liquid, and the gas is compressed to do work, so that the liquid energy is finally converted into the energy of the gas.rotary-vane-vacuum-pump-buying-guide

2. rotary vane vacuum pump working process:

Rotary vane vacuum pump and water ring vacuum pump are opposed to prohibit the suction of gas containing water or steam, such as containing water will pollute the vacuum oil inside the rotary vane vacuum pump, inverted vacuum pump injection vacuum degree can not reach, long time will damage the vacuum pump components.liquid_ring_vacuum_pump

Types and characteristics

1. Types and characteristics of rotary vane vacuum pumps

Rotary vane vacuum pump mainly includes: Rotary vane vacuum pump is one of the basic equipment used to extract the gas from the closed container. It can be used alone or as the first parts of booster pump and molecular pump. This type is widely used in vacuum pump smelting, vacuum plating, vacuum heat treatment and vacuum drying in metallurgy, machinery, electronics, chemical industry, petroleum, medicine and other industries.

2. Types and Characteristics of Water Ring Vacuum Pumps

Water-ring vacuum pumps mainly include SK water-ring vacuum pump, ska direct-connected vacuum pump, 2SK double-stage water-ring vacuum pump and 2BV stainless steel water-ring vacuum pump. These pumps are mainly used in the process of rough vacuum and large air-pumping capacity. The vacuum pumps made of cast iron mainly pumps non-corrosive gases. The new stainless steel and glass steel can transport corrosive gases.Roots_Vacuum_Pump

Liquid Ring Vacuum Pump and Liquid Ring Compressor Working Principle

The working principle of the liquid ring vacuum pump and the liquid ring compressor are exactly the same, and the basic types and structures are roughly the same, but there are also different places. In order to make a better distinction between the two products, the following article explains in detail for you, the following five aspects are different:rotary-vane-vacuum-pumps

1. The circumferential velocity range of impeller is different.

The circumferential velocity of the impeller is mainly determined by the pressure difference between the suction chamber and the compression chamber. Because the suction pressure of the compressor is generally atmospheric pressure, and the exhaust pressure of the vacuum pump is generally atmospheric pressure, the pressure difference of the compressor is large, and the circumferential speed required is also large. The performance of the same water ring pump is different when it is used as a vacuum pump and a compressor. If a vacuum pump is used as a compressor, it can work economically only if the rotational speed is increased accordingly.liquid-ring-vacuum-pump-buying-guide

2. The range of optimal compression ratio is different

The so-called optimal compression ratio is the compression ratio at higher efficiency. Generally speaking, the optimal compression ratio of vacuum pump is higher than that of compressor.

3. Shaft power is different

The effective power of the same size liquid ring vacuum pump is larger than that of the vacuum pump when it is used as a compressor, and the circumferential speed of the impeller is generally selected according to the requirements of the vacuum pump at present. Thus, when it is used as a compressor, it is in the low efficiency zone and the required shaft power is larger. Therefore, the power of the compressor is larger than that of the vacuum pump.

4. Different structures of gas-water separators

The air-water separator of vacuum pump is flat-top, the overflow pipe is ordinary water pipe, and the top of the air-water separator of compressor is spherical. The overflow pipe of vacuum pump is controlled by a float regulating valve, so as to prevent the compressed gas from escaping when the water level is below the overflow pipe, and reduce the gas pressure and effective gas quantity.

5. Different sizes of exhaust holes

At the same size, the exhaust hole of the compressor is smaller than that of the vacuum pump.piston-vacuum-pump-structure

Roots vacuum pump application in the paper industry

Generally speaking, the pumping capacity of the standard specified in the paper production line is certain, but in order to reduce energy consumption and save production costs, the selection of the vacuum pump is particularly important. For the paper industry, the Roots vacuum pump is usually used instead of a water ring vacuum pump. Therefore, comparing the economic benefits of the Roots vacuum pump and the water ring vacuum pump is the primary problem for paper manufacturers. Of course, this will also involve the selection of the Roots vacuum pump.

The application of vacuum pumps to effectively reduce papermaking costs and improve paper quality is a good hope for Kaide Vacuum Technology. Today, I will tell you about the application and selection of Roots vacuum pumps in the paper industry. In the process of pulp and paper technology, the vacuum dewatering method can be applied to the dehydration process, and the vacuuming by the Roots vacuum pump is a common method for papermaking dewatering.


In the process of which papermaking process, vacuum dewatering is required:

1, coarse pulp washer

The drum-shaped interior of the washer is capable of creating a vacuum that allows the material to adhere to the drum surface and allow the black liquor to be washed from the material while the drum is operating in the stock slurry.

2, sediment filter

A sediment filter in a pulp and paper mill is a horizontal drum filter in which a vacuum condition can be generated inside the drum to collect particles from the green liquor.vacuum-pump-buying-guide

3, vacuum dehydrator

The vacuum dewatering machine can be used for dewatering in the raw material preparation stage. It is a horizontal drum filter that achieves proportional dewatering from pulp and increases the concentration of raw materials.

4, the pulp box compressor or vacuum pump

The headbox compressor or vacuum pump is used in the slurry tank. Through a series of valves, a pressure or vacuum can be added to the raw material tank of the headbox to control the material discharge rate.

5, suction box

The suction box is applied to the forming section of the paper and can be directly dewatered from the pulp. The Roots vacuum pump is used to produce vacuum conditions in the suction box vacuum box.liquid_ring_vacuum_pump

6, the roller

The couch roll is an important dewatering section in the paper forming stage and is stationary with a rotatable porous casing that can have one or two vacuum zones.

7, vacuum pressing

The vacuum press mechanically extracts moisture from the paper. Paper machines typically have one to three press zones where the moisture is absorbed into the press felt as the paper transports and pads.Roots_Vacuum_Pump

8, blowout prevention box

The blow-proof box is fixed before the paper is transferred into and can be used to create a vacuum in the upper region of the press section.

Vacuum pumps are widely used in the paper industry, and Roots vacuum pumps have a good performance in this industry.

Vacuum pump installation conditions

In the general enterprise production, the vacuum pump needs to be set to the pump house when it is used. Only the set is qualified, and the working effect will be stronger when it is used. Below we vacuum pump manufacturer will introduce the pump room setting for everyone. conditions of.rotary-vane-vacuum-pumps

1. The elevation of the bottom plate of the pump room of the vacuum pump: when the pump is stopped, the water level of the collecting pool is lower than the central axis of the sewage water pipe by 1m, and the water depth is set to 2m, so the pumping floor floor height is 23.30m.

2. Set 4 submersible pumps in the pump, the pump distance is 3m, and the pump room length is 20m.

3. It should be composed of machine room and collecting basin. The width between machines is 4.2m, and the width of collecting water is 4.3m.

4. The machine is divided into 2 compartments. One HZPN-II 1.5m*1.5m cast iron plate gate is set, and the trash net is set at 2.5m from the side wall.

5. The length of the collecting well is 20m, the width is 4.3m, the water depth is 2m, the effective volume is 172m3 (not counting between machines), and the pumping capacity is more than 127m3 for 5min of single pump.piston-vacuum-pump-structure

6. Set 2 SV064B submersible slurry pumps in the catchment, 1 for use, and the vacuum pump is placed in the dirt collection pit with a ground elevation of 20.75m.

For the vacuum pump, the pump room setting is very important. If there is no pump room, the vacuum pump can't work, so we should understand the above knowledge.liquid-ring-vacuum-pump-for-vacuum-drying

Vacuum pump repair skills

If your vacuum pump has some minor problems during use, and it takes time and effort to go to the repair shop, you can try to repair your equipment yourself. Then, what are some small tricks that can help us to repair and inspect us? What about the vacuum pump?Roots_Vacuum_Pump

1. The operator should understand the various parts of the exterior, pumps and equipment, and read and understand the various instructions;

2. If there is abnormal condition after power on, it should be immediately swept or stopped to find the reason;

3, the cooling water pressure should be between 0.1 ~ 0.2Mpa, the water temperature ≤ 45 ° C;

4. Before starting the furnace, check the gas cylinder capacity of the maintenance gas to avoid the lack of gas filling and replace the gas cylinder;

5, often check the return amount of each part, the operation should ensure that each part has enough cooling water;liquid_ring_vacuum_pump

6. The compressed air pressure is between 0.4 and 0.5 MPa.

In addition, in daily production and life, the bolts of various parts of the vacuum pump are regularly viewed, and if loose, they are tightened in time.

how-to-choose-best-vacuum-pump-for-your-industry

Roots vacuum pump maintenance

We all know that the long-term efficient operation of the Roots vacuum pump is based on regular maintenance, so the maintenance of the equipment can not be ignored, including the cleaning of dirt and the maintenance of components, in which its exhaust filter will directly affect the equipment. Normal operation, so the maintenance of this part is important:liquid-ring-vacuum-pump-vacuum-adsorption

1. Cleaning: Roots vacuum pump exhaust filter is made of special materials, it is relatively easy to damage, so it needs maintenance. After using for a period of time, the vacuum filter element has already retained some filtered impurities. If it is not cleaned up in time, if it continues to be used, it will increase the pressure, and the transmitter will remind the alarm, then it needs to be cleaned up. And clean the vacuum pump exhaust filter. Also be careful not to deform or damage the filter element during cleaning, otherwise it will affect the reuse, and will also reduce the efficiency of filtration and even destroy the entire system.rotary-vane-vacuum-pumps

2. Replacement: When replacing the Roots vacuum pump exhaust filter, prepare the basin and towel in advance. The general vacuum pump filter has a method for replacing the vacuum pump exhaust filter. Everyone must replace it according to the standard method, so as not to damage the filter element and increase the service life of the exhaust filter.piston-vacuum-pump-structure

After reading the above maintenance methods for the Roots vacuum pump exhaust filter, I believe that everyone has further understanding of this equipment. In the future use of the equipment, we must not forget to check the important parts, and solve the problems in time. A method of increasing the life of a device.