How to choose a suitable multi-stage centrifugal blower? (2026 Linyi Industrial Selection Guide)
1、 Four step decision-making method for selection: from working conditions to landing
1. Clarify the core operating condition parameters
The starting point for selection must be precise process requirements, rather than vague "used in sewage treatment" or "pneumatic conveying". Three hard indicators need to be locked in:
|Parameters | Sewage treatment aeration | Cement pneumatic conveying | Steel blast furnace blowing|
|Flow rate | 50-200 m ³/min | 100-300 m ³/min | 200-800 m ³/min|
|Pressure | 50-70 kPa | 80-120 kPa | 150-250 kPa|
|Medium | Moist air, sulfide containing | High dust, dry cement powder | High temperature air (>100 ℃), hydrogen rich|
✅ Key tip: 10-15% margin should be reserved for flow to cope with fluctuations in operating conditions; The pressure should be calculated based on the total resistance of the system (including pipelines, aeration heads, and filters), rather than the rated value of the equipment.
2. Match technology type and energy efficiency level
Select the optimal technical route based on operating pressure and operating costs:
|Type | Applicable Scenario | Energy Efficiency Level | Annual Energy Saving Potential | Maintenance Cost|
|Traditional multi-stage centrifugation | Medium low pressure, continuous operation | GB/T 28381-2022 Grade 1 | 0-15% | Low (mechanical bearings, annual inspection once)|
|Magnetic levitation centrifugation | High precision aeration, energy-saving transformation | ≥ 87% (mandatory level 1) | 22-30% | Extremely low (oil-free, lubrication free, lifespan>10 years)|
|Imported high-end type | High voltage, high purity, explosion-proof | International standard | 15-20% | High (long original spare parts cycle)|
📌 Local suggestion in Linyi: Municipal sewage treatment plants should prioritize the use of maglev models, which can meet the mandatory energy consumption requirements of the "Technical Guidelines for Upgrading and Upgrading Urban Sewage Treatment Plants in Shandong Province".
3. Compare the parameters of actual models on sale
⚠️ Reminder for avoiding pitfalls: "Multi stage centrifugal blowers" priced below ¥ 5000 are mostly multi wing low-pressure fans (such as the 680 yuan Green Island Wind model), not suitable for aeration or pneumatic conveying, only for ventilation.
4. Verification services and quality assurance system
Warranty period: Priority should be given to brands that provide a 2-year or more warranty for the entire machine (such as Aizhen and Zhanggu)
Local service: There is no manufacturing plant in Linyi, but Shandong Zhanggu (Zibo) and Aizhen Machinery (Zhejiang) have Shandong regional service outlets that can provide installation, commissioning, and spare parts support
Intelligent function: It is recommended to choose models that support variable frequency control and remote monitoring to achieve on-demand air supply and reduce energy consumption by 10-20%
2、 Recommended Selection Table for Typical Scenarios (Applicable to Linyi)
|Application scenarios | Recommended models | Key parameters | Reasons for selection|
|Municipal sewage treatment plant aeration | Aizhen magnetic levitation centrifugal blower | Flow rate: 80-150 m ³/min, pressure: 60 kPa, efficiency ≥ 87% | Energy saving 30%+, noise ≤ 75dB, maintenance free, in line with Shandong Province's energy-saving renovation subsidy guidance|
|Cement plant raw material/clinker pneumatic conveying | Shandong Zhanggu multi-stage centrifugal blower | Flow rate: 180-250 m ³/min, pressure: 100 kPa, dust resistant design | Low cost, sturdy structure, easy to replace impeller, suitable for high dust environment|
|Steel plant blast furnace blower (medium) | NICO imported multi-stage centrifugal blower | Pressure: 180-220 kPa, flow rate: 300-500 m ³/min | High pressure stability, high temperature resistance, explosion-proof certification, ensuring continuous smelting|
|Ventilation for small printing and dyeing factories/slaughterhouses | Xinjunze D series | Flow rate: 25 m ³/min, pressure: 40 kPa, power: 7.5kW | High cost-effectiveness, easy installation, meets basic boosting needs|
3、 Technological Trends and Policy Linkage (Key Points for Linyi Implementation in 2026)
Policy linkage: Linyi implements the unified policy of Shandong Province, and there will be no direct financial subsidy from 2026 onwards. However, energy-saving renovation projects can apply for the "Green Manufacturing Special Fund", and magnetic levitation fans can be prioritized for application due to energy efficiency ≥ 87%.
Comparison of operation and maintenance costs (taking 100 m ³/min and 65 kPa working conditions as an example):
Traditional models: Annual power consumption of about 130000 kWh, electricity cost of about 78000 yuan
Maglev model: Annual power consumption of about 95000 kWh, electricity cost of about 57000 yuan
Annual electricity cost savings of 21000 yuan, with a payback period of 2.5 years
Installation requirements: A maintenance channel of ≥ 1.5m must be reserved, and the fan and pipeline must be flexibly connected to avoid vibration transmission that may cause pipeline cracking.
Shandong Ruidian Environmental Protection Technology Co., Ltd. is located in the high-end equipment manufacturing base of Luozhuang District, Linyi City. It is a modern enterprise that focuses on the research and development, design, production, and manufacturing of multi-stage centrifugal blowers, centrifugal vacuum pumps, Roots blowers, pneumatic conveying systems, and soil remediation integrated special equipment. Its telephone number is 13287120066.
