scr air compressor

High-efficiency permanent magnet motor

1. High-efficiency permanent magnet motor, more energy-saving than ordinary frequency conversion motor.

2. When the motor speed is low, the permanent magnet frequency conversion still maintains a high motor efficiency.

3. Able to achieve soft start: the motor will not exceed the full load current when in motion, and at the same time greatly reduce the impact on the grid equipment, and will not cause damage to the electrical equipment.

You must understand the energy-saving technology of two-stage oil-injected screw air compressors!

Air compressor is a kind of equipment with huge power consumption. Its power consumption accounts for about 7% of my country's total power generation. Its main forms are piston type, rotary type, sliding vane type, etc. Screw compressor is a kind of rotary compressor, which is widely used in various industrial fields in our country. scr air compressor

At present, the energy efficiency level of screw compressors above 160kW is relatively low. Only the products of individual companies can reach the level II energy efficiency, and most of the products are mainly at the level III energy efficiency level. At present, the application of this technology can achieve energy saving of 120,000 tce/a, and carbon dioxide emission reduction of about 320,000 t/a. scr air compressor

1. Technical principle

Oil-injected screw air compressors use two-stage compression to improve the energy efficiency of the compressor. The improvement in energy efficiency is based on the following two main reasons: First, the pressure ratio of each stage is reduced, the volumetric efficiency is improved, and the energy efficiency of each stage is reduced. Internal and external leakage; the second is that the oil and gas mixture can be fully mixed before the first-stage exhaust enters the second-stage suction to play the role of inter-stage cooling. This more fully mixed oil and gas mixture enters the second stage of the compressor for compression. It also makes the compression process of the second stage closer to the isothermal process, which improves the energy efficiency of the compressor. scr air compressor

2. Key technology

·High-efficiency rotor profile technology;

·The key technology of inter-stage cooling: multiple spray holes are installed on the compressed gas channel to form a mist spray curtain to achieve rapid cooling. The whole process is close to isothermal, and the energy saving effect is better;

·System structure optimization technology, including pressure ratio distribution optimization technology, exhaust air port optimization technology, fuel injection volume optimization technology, etc.

3. Process flow

The technical process mainly includes: compressed air process, lubricating oil process and control pipeline process.

(1) Compressed air process

After the air passes through the air intake filter to filter out dust or impurities in the atmosphere, it enters the first stage of the compressor through the air intake control valve, and is mixed with the injected cooling lubricant during the compression process. The compressed mixed gas is removed from the first stage of the compressor. The two-stage compression cavity is discharged into the connecting cavity, mixed with sprayed lubricating oil in the connecting cavity, and cooled, and then enters the air inlet cavity of the secondary main engine, and is compressed and increased in pressure, and discharged from the two-stage compression cavity into the oil-gas separation tank.

(2) Lubricating oil process

The lubricating oil in the oil and gas barrel is pressed out, passed through a temperature control valve, an oil cooler, and cooled by an oil filter to remove impurities and particles, and then divided into two paths. One way is sprayed from the lower end of the machine body into the first-stage compression chamber to cool the compressed air and pass to both ends of the first and second-stage bodies to lubricate the bearing group; the other way is sprayed into the connecting cavity through the pipeline to reduce the temperature of the first-stage compressed gas. Then, the lubricating oil in each part is gathered at the bottom of the compression chamber and discharged from the exhaust port. After the compressed air mixed with oil is discharged into the oil-gas drum, most of the oil is deposited at the bottom of the oil-gas drum, and the remaining oil-containing mist air passes through the oil fine separator to further filter the remaining oil and participate in the next cycle. scr air compressor

(3) Control pipeline flow

Start→load operation→unload operation.

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