Roots Blower Selection Applications

At the time of global energy shortage, Roots blower, like other blowers, has the problem of improving efficiency and reducing power consumption. Today let’s have a look at the Roots Blower selection and applications in different industries.

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1. Principle of Roots Blower Model Selection

Firstly, we should select the model, structure, and material of the roots blower according to the performance parameters, purpose, process requirements, and application occasions to meet the required working conditions. The inlet flow and pressure rise of the roots blower shall be close to the process requirements as much as possible, so as to make the roots blower operate efficiently. Otherwise, it will cause accidents and waste of energy.

To select the model of three lobes roots blower according to the nature of the conveyed medium, the flow, and pressure required by the process flow. At the same time, we should consider the pressure loss from pipe network resistance and the flow loss.

The medium temperature shall be the highest temperature in normal operation. Before selection, we need to carry out actual measurements or investigate the previous operation records of the roots blower.

Finally, we should comprehensively consider the above data according to the operation of the existing blower, and finally determine the design parameters of the Roots Blower. So as to avoid the situation that the flow and pressure of the new roots blower can not meet the actual operational needs.

2. Roots Blower Development Trend

Roots blowers mainly convey air. With different sealing structures, roots blower can also transport flammable, explosive, and corrosive gases such as biogas, hydrogen, acetylene, and carbon dioxide. It integrates blower, motor, filter, inlet, and outlet muffler, flexible joint, safety valve, check valve, and pressure gauge. It can be equipped with a PLC signal interface, intelligent monitor, and sound insulation cover.

3. Selection and applications of powder conveying industry

(1) Vertical kiln blower

(2) Pneumatic ash conveying

coal-fired power plants can produce a large amount of fly ash in the production process. Firstly, the electrostatic precipitator is used to collect it into the ash hopper; Then put the coal ash into the transmission pipeline. Finally, use the compressed air discharged by the roots blower to make the coal ash flow into the ash silo; The following are the performance parameters for Roots blower.

Pressure rise: 68.6kpa; Airflow of 5 ~ 16m³/min.

Another common method is negative pressure suction at the end of the ash conveying system to make the fly ash fall into the ash silo. Roots Blower Models:RSR100, RSR125, RSR150.

(3) Polymer powder conveying

In the process of polymer production, we usually use nitrogen to transport granular raw materials such as polyethylene and polypropylene. The purpose of using nitrogen is to prevent the explosion of polymer raw materials with air and flammable and volatile media. In order to reuse nitrogen, the conveying system is a closed-loop. After filtration, The delivered gas will return to the blower for recycling. Roots Blower Models:RSR100, RSR125, RSR150, RSR200, MTRR150, MTRR190.

4. Roots Blower Selection and applications of vacuum packaging industry

Food vacuum packaging

Place food in flexible bags. There is An air extraction port at the opening of the bag. Draw out the air in the bag with negative pressure, and then seal the bag mouth with a heat sealer. Because most of the air in the bag is eliminated and the moisture in the bag is controlled, it can be used for food moisture-proof, mildew proof, oxidation proof, etc. Common models: RSR80, RSR100, RSR125, RSR150.

5. Roots Blower Selection and applications of wastewater treatment industry

Sewage aeration treatment:.

6. Selection and applications of Roots Blower in aquaculture industry

Aquaculture

7. Roots Blower Selection and applications in chemical industry

(1) Fluidized bed furnace air supply

In the gas-solid two-phase contact of chemical reaction, place the solid particles on the air distribution plate. Then the air from the roots blower will make the granular materials boil and fluidize, and fully contact with other reactants or catalysts, so as to improve the reaction speed and efficiency. For example, prepare phthalic anhydride from naphthalene, prepare sulfur dioxide from pyrite by roasting, etc. Similar uses: supply air for combustion furnace, etc. Roots Blower Models: RSR200, RSR250.

If you want to learn more, please visit our website Roots Blower Manufacturer.

(2) Ozone generation source

There are dozens or even hundreds of groups of the same discharge tubes inside the tubular ozone generator. Each group of discharge tubes consists of two concentric tubes. The outer tube is a metal tube and the inner tube is a glass tube (the inner wall surface is silver or graphite conductive layer). The oxygen or air provided by the roots blower is the air source of the high concentration ozone generator. When passing through the discharge gap between the two tubes, the air convert to ozone. Roots Blower Models: RSR200H, RSR200.

(3) Air humidifying device

Firstly, water is supplied to the center of the splash tray. Under the action of centrifugal force, water flies around. The air discharged by the roots blower atomizes the water droplets and blows the water mist to every corner of the room. It can adjust The humidity of the air by changing the spray volume properly. Textile workshop mixing, cigarette, and printing factory anti-static usually use this system. Commonly used Roots Blower models: RSR100, RSR125.

(4) Paper paddle dewatering

A filter screen is laid on the surface of the hub, and a plurality of radially arranged cavities are arranged inside. During operation, the mesh surface adheres to the pulp, and the cavity will successively connect with the vacuum pump extraction area and the blower pressure area through the distribution valve. When passing through the air extraction area, it will separate the waste liquid from the pulp. After arrives the pressure area, it will loosen outward the pulp layer and finally scrap down by the scraper. Common used Roots Blower models: RSR150, RSR200H, RSR200, RSR250D.

(5) Electroplating solution stirring

Use the compressed air provided by the blower to stir the electroplating solution. Therefore, it can obtain a high-quality current density. The temperature of the solution everywhere can be uniform. The solution around the workpiece can be continuously updated by stirring. So that it will realize the rapid transmission of ions and the uniform deposition of non-metallic particles. At the same time, it can wash away the dirt and grease from the workpiece, so as to improve the electroplating quality.

8. Roots Blower Selection and applications in other industries

(1)Pressure conveying industry

Three lobes roots blower can be used for pressure conveying flour in flour mill because of its pressure self adaptability. When the flour is fed into the granary, the pressure disappears. We should choose the pressure according to the following factors: A. Pipe length; B. Resistance: C. Conveying material ratio. Generally, pressure rise is 49.0-78.4kpa and air Flow is 2-45m³/ min. Similar use: pipeline cleaning, etc.

(2)City gas transmission

9. Conclusion

Combined with the current situation of three lobes roots blower at home and abroad, this paper introduces the selection principle of Roots blower and gives the selection and application classification under the actual operating environment of various industries. It has important reference value for users and design institutes to select the most ideal models of three-blade roots blower. Shandong Mingtian Machinery Group is manufacturing roots blowers and vacuum pumps since . If you have any questions about roots blower selection and applications, feel free to contact us.

A thorough analysis of your installation and application is key to selecting the right technology, and there will undoubtedly be one or more aspects might take precedence over others. For example, a smaller space for the blower might dictate choosing a technology with a smaller footprint and lower noise levels, while an application that requires lower energy costs may be best suited for an energy-efficient technology that has a higher initial cost. Key factors that should be taken into consideration include:

• Flow and Pressure
• Application conditions
• Initial capital cost vs. greatest ROI
• Operating noise levels
• Service and lifetime support
• Reliability
• Efficiency
• Maintenance requirements
• Space limitations

There are many types of low-pressure technologies available on the market, including lobe, screw, centrifugal, and multistage. Figuring out which one is most ideal for your application can be overwhelming! Below we provide some technology comparisons that often arise when weighing one technology against another.

Lobe vs. Screw. A lobe blower (also called a Roots blower) is a traditional and reliable technology that offers low initial capital cost. Screw blowers, in comparison, offer greater reliability, high turn down, and superior energy efficiency for a greater ROI.

Multistage vs. Turbo. Multistage blowers are best for specialist applications and offer an industry standard performance. Turbo or turbo-multistage blowers, however, are a combined technology configuration that provides reliable, market leading performance for varying air demands for the lowest lifecycle cost and ultimate energy efficiency.

VSD Options. Over 80% of a blower’s lifecycle cost is taken up by the energy it consumes. Moreover, the generation of compressed air can account for more than 40% of a plant’s total electricity bill. Selecting a Variable Speed Drive technology can lead to major energy savings while also helping protect the environment for future generations.

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