Metallurgical screw blower
1. The rotor adopts a large shaft diameter design, which provides higher shaft stiffness and load-bearing capacity.
2. The locating end uses a combination of four-point angular contact ball bearings and cylindrical roller bearings, ensuring that the bearings have sufficient load capacity and stability under extreme conditions, prolonging bearing life.
3. The casing adopts a mid-connection structural design, which ensures uniform stress distribution and improves the overall load-bearing capacity of the casing; the large reinforced rib design enhances the casing stiffness, ensuring reliable operation under high pressure.
4. Splash lubrication is used, resulting in low oil-stirring power consumption, ensuring a stable supply of lubricating oil to gears and bearings.
5. The unique air seal design provides good sealing performance and long service life.
6. The end cover adopts a streamlined heat sink design, which is more conducive to gearbox cooling.
The screw compressor consists of a pair of parallel, intermeshing male and female screws and is the most widely used type of rotary compressor. It is divided into single-screw and twin-screw types, and the screw compressor commonly referred to is the twin-screw compressor. It was not until 1934 that A. Lysholm from the Royal Institute of Technology in Sweden laid the foundation for this technology and began its industrial application, achieving rapid development. The screw compressor is a positive displacement compressor, and its working cycle is based on the rotational motion of a pair of intermeshing male and female screws. The gas intake, trapping, compression, and discharge are realized through the periodic change of the volume between the teeth.
Screw Compressor Compression Principle:
Intake Process:
When the rotor rotates, the tooth space volume formed by the main and auxiliary rotors gradually expands. This volume is only connected to the intake port, and external air is drawn into the tooth space volume. When the tooth space volume reaches its maximum, it is disconnected from the intake port, and the intake ends. This is the "intake process."
Sealing and Conveying Process:
At the end of intake, the peaks of the main and auxiliary rotors seal with the casing, and the air within the tooth space is enclosed in a sealed chamber formed by the main and auxiliary rotors and the casing, which is the "sealing process." As the two rotors continue to rotate, the main and auxiliary rotor teeth mesh with each other, and the meshing surface gradually moves toward the exhaust end. The air in the tooth space is also conveyed toward the exhaust end, which is the "conveying process."
Compression and Oil Injection Process:
Specific Application Scenarios for Each Process Step
1. Sintering Workshop
Flue Gas Desulfurization Oxidation
Provide a stable low-pressure air supply to oxidize sulfites into gypsum, without oil or gas contamination of desulfurization agents, ensuring environmental compliance.
Bag Filter Pulse Backblowing
Used for cleaning filter bags, stabilizing air pressure, preventing dust blockage, improving dust removal efficiency, and reducing downtime for cleaning.
Silo Material Fluidization
Assist flow of sinter ore and raw materials in silos to prevent clogging and arching, ensuring uniform and stable discharge.
2. Blast Furnace Ironmaking Workshop
Blast Furnace Gas Transport and Pressurization
Pressurize and transport blast furnace gas to hot blast stoves and power boilers, recover and utilize waste heat, saving energy and reducing consumption.
Pulverized Coal Injection for Combustion Assistance
Transport pulverized coal at low pressure, replacing part of the coke, reducing steelmaking raw material costs.
Pipeline and Equipment Blowing
Daily blowing of furnace pipelines, vents, and dust removal pipelines to clear accumulated dust and debris.
3. Converter Steelmaking & Refining Process
Furnace Mouth Dust Removal with Negative Pressure Compensation
Maintain negative pressure in the steelmaking hood to prevent flue gas dust overflow and improve workshop environment.
LF/RH Steel Refining Bottom Blowing
Blow gas to stir molten steel, unify temperature and composition, remove inclusions, and improve steel quality.
Continuous Casting Machine Auxiliary Blowing
Blow air on cast slab surfaces and provide auxiliary cooling airflow to improve surface quality of cast slabs.
4. Steel Plant Wastewater Treatment Station
Aeration Supply for Biochemical Pools
Aeration for steelmaking wastewater and comprehensive plant sewage biochemical treatment, supplying oxygen for microorganisms and degrading COD and ammonia nitrogen.
Sludge Conveying and Drying Air Supply
Pneumatically convey sludge and assist in sludge drying, facilitating subsequent filter pressing.
5. Plant Utility Engineering
Workshop Ventilation and Equipment Cooling Air Supply
Instrument air assistance, low-pressure constant-pressure air supply for plant pipeline network
Air Source for Raw Material Pneumatic Conveying
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.
