Screw blower for wastewater treatment
1. Advanced rotor-type line design effectively reduces fluid dynamic losses and improves main engine efficiency.
2. Excellent internal compression characteristics, low power consumption, and energy savings up to 30% compared to Roots blowers.
3. Adopts air-cooled structure, single-stage pressure of 250 kPa without cooling water.
4. Oil-free design in the rotor chamber ensures air quality.
5. Low airflow pulsation level; the fan operates smoothly at high speed and high pressure with low aerodynamic noise.
6. Uses helical synchronous gears, keyless connection, reliable positioning, ensuring smooth and safe operation over a wide speed range.
Definition and Working Principle of Screw Blowers
A screw blower is a type of volumetric gas conveying equipment. It mainly consists of a main unit, motor, air filter, control system, and other components. Its working principle is based on the meshing rotation of screws. When the screw rotates, air is drawn in from the intake port, and as the screw rotates, the air is compressed in the screw grooves and transported forward, finally discharged from the exhaust port. This mode of operation enables the screw blower to deliver gas stably and efficiently.
Characteristics of Screw Blowers
First, screw blowers are highly energy-efficient. Due to their unique screw design and advanced control system, they can reduce energy losses during gas transportation and improve energy utilization efficiency. Compared to traditional blowers, screw blowers can save a significant amount of electricity. Second, screw blowers operate stably and reliably. Their compact structure and fewer components reduce the likelihood of failures. Meanwhile, sophisticated control systems can monitor the operating status of the equipment in real-time, promptly identifying and addressing potential issues, ensuring long-term stable operation. Furthermore, screw blowers are low in noise. During operation, the smooth rotation of the screws and well-designed sound insulation result in minimal noise, which does not disturb the surrounding environment and operators.
Applications of Screw Blowers
In the wastewater treatment industry, screw blowers are indispensable equipment. They provide sufficient oxygen during the aeration process, promoting microbial growth and metabolism, effectively removing organic matter and pollutants from wastewater. In the chemical industry, screw blowers can be used to transport various chemical gases, such as hydrogen and nitrogen. Their stable conveying performance and corrosion-resistant material selection ensure safety and efficiency in chemical production. Additionally, in industries such as food and pharmaceuticals, screw blowers are also widely used in material conveying, drying, and other process steps.
Application and Role of Screw Blowers in Wastewater Treatment
1. Main Application Locations
- Biochemical aerobic tanks, aeration tanks (most commonly used)
- Auxillary aeration in anoxic and anaerobic tanks
- Sludge tanks, sludge digestion tanks
- Filter backwashing, biological filters
- Full aeration systems in industrial wastewater and municipal sewage plants
2. Core Roles
- Providing oxygen for microorganisms in wastewater: Wastewater relies on bacteria to decompose pollutants. Screw blowers continuously supply air to ensure aerobic bacteria survive and reproduce, breaking down COD, ammonia nitrogen, and organic matter, purifying the wastewater to meet standards.
- Water mixing and preventing sludge sedimentation: The air flow stirs the water, keeping activated sludge from settling at the bottom, maintaining uniform mixture of sludge and water, resulting in more stable treatment.
- Aeration and oxygenation, reducing ammonia nitrogen, removing odors: Increases dissolved oxygen in the water, degrades ammonia nitrogen and total phosphorus, reduces water blackening, odor, and biogas smell.
- Filter backwashing: Provides backwash air for sand filters and carbon filters, cleaning filter impurities and restoring filtration capacity.
- Sludge aeration and volume reduction: Aeration in sludge stabilization tanks promotes fermentation, stabilizing and reducing sludge volume, facilitating subsequent filter press treatment.
About us
Shandong Zhangqiu Blower Co., Ltd. (abbreviated as “ZhangGu”, Stock Code: 002598) is one of China’s most reputable and influential manufacturers and suppliers, with nearly 50 years of experience in R&D and production. The company has established two Chinese-Japanese joint ventures and founded the first American branch in China’s blower industry. Today, ZhangGu has grown into a large-scale, modern enterprise engaged in the design and manufacturing of Roots blowers/pumps, turbo blowers, industrial pumps, mills, pneumatic conveying systems, electrical control equipment, and MVR systems. In July 2011, ZhangGu was successfully listed on the Shenzhen Stock Exchange.
