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Roots blower

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Product Description

A Roots blower is a type of positive displacement blower, often abbreviated as Roots blower in English. The working principle involves two rotors with involute or similar shapes, a casing, side plates, and synchronous gears. The rotor shafts are parallel, and the rotors are driven by an electric motor through a pair of synchronous gears at equal speeds but in opposite directions. During rotation, the rotors carry gas from the intake port; each concave surface forms a working volume with the cylinder wall, pushing the gas without internal compression towards the exhaust port. As high-speed airflow approaches the exhaust port, the pressure within the working volume suddenly increases due to backflow from the high-pressure exhaust side, expelling the gas.

Structural features of the Roots blower include an enhanced casing made of high-strength cast iron or welded steel plate, capable of withstanding higher pressures for stability and safety under high-pressure conditions. Precise rotor gaps minimize internal leakage, improving volumetric efficiency and maintaining high gas delivery efficiency at high pressures. High-precision gears with hard tooth surfaces ensure stable transmission and accurate relative positioning of the rotors, maintaining normal operation. A sealing mechanism combining labyrinth seals and air seals effectively reduces high-pressure gas leakage. For conveying flammable, explosive, or corrosive gases, mechanical seals can be used to further enhance sealing performance.

Performance characteristics

Performance parameters of the Roots blower include a pressure range typically between 58.8 kPa and 200 kPa, with some specially designed high-pressure Roots blowers exceeding this range to meet various industrial demands for high-pressure gases. Flow rate generally ranges from 1 m³/min to 50 m³/min, though it decreases with increasing pressure. Power consumption ranges from 7.5 kW to 450 kW, higher due to the energy required to compress gas under high-pressure conditions. Rotational speed typically ranges from 1000 rpm to 3000 rpm, aiding in efficient gas delivery but demanding higher structural and material standards.

Cooling methods include air cooling suitable for medium and low-pressure conditions up to 98 kPa, using external fans to dissipate heat via airflow. Water cooling is used for high-pressure Roots blowers, with cooling water jackets on the casing or bearing housing to circulate water and remove heat, preventing deformation or damage from high temperatures during high-pressure operation, ensuring stable and reliable performance.

Application Scenarios

Rotary lobe blowers are widely used in various fields such as wastewater treatment, pneumatic conveying, aquaculture, chemical and metallurgical industries, and power generation. In wastewater treatment, they supply gas to aeration tanks, overcoming high water pressure during deep water aeration to promote microbial growth and metabolism, accelerating the decomposition of organic matter and purifying the wastewater. In pneumatic conveying, they mix powdery and granular materials with air and transport them to designated locations using high-pressure airflow, offering advantages like long conveyance distance, high efficiency, and no pollution. In aquaculture, they inject air into the water body to increase dissolved oxygen levels, providing a favorable living environment for fish and other aquatic organisms, promoting their growth and health. In the chemical and metallurgical industries, they are used for gas circulation in high-pressure reactors and furnace blowing, providing the necessary gas atmosphere and pressure conditions for chemical reactions and metallurgical processes. In the power industry, they supply oxidation air to desulfurization and denitrification systems, helping to remove sulfur dioxide and nitrogen oxides from flue gases, reducing environmental pollution.

Zibo Hongcheng Blower Co., Ltd. specializes in producing over 50 series and more than 600 specifications and models of blowers, which are extensively applied in mining, coal mines, oil fields, chemical plants, kilns, metallurgy, boilers, textile, and building materials industries. They offer custom production and processing according to provided drawings. Contact them for cooperation opportunities.

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Products

Products

How do fan shafts impact industrial efficiency?

How do blowers advance environmental protection?

How do high-temp gas fans improve industrial efficiency?

How are corrosive gas fans innovating sustainability?

What’s the role of induced draft fan furnaces?

What’s the role of induced draft fan furnaces?

Roots blower

Description

marker

Product Description

Performance characteristics

Application Scenarios

contact us

Related popular products

Mixed-flow fans

Multi-stage centrifugal blower

Stainless steel centrifugal fan

Axial flow fans

Jet fans

Dual Inlet Centrifugal Fan

Dust removal centrifugal fans

An auxiliary combustion fan

FBD series (dⅠ) explosion-proof pressure-injection counter-rotating axial flow local ventilation fan

HTF type fire smoke exhaust axial fan

Boiler centrifugal blowers

Anti-corrosion centrifugal fans

Boiler centrifugal induced draft fans

JK series of mine local exhaust fans

High-temperature draft fans

Smoke exhaust fans

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