Energy-saving and electricity-saving gas compression system

Abstract

The invention relates to an energy-saving and electricity-saving gas compression system. The gas compression system comprises a heat exchanger, a steam turbine and a draught fan. The power output end of the steam turbine directly drives the draught fan or is in transmission connection with an electric generator and the electric generator provides electric power for the draught fan for operation. Besides a main bypass, a first bypass is further led out of an outlet of a gas compressor and connected with a gas inlet of the heat exchanger to provide a heat source for the heat exchanger. The heat exchanger is further connected with the steam turbine through a heat exchange pipeline which conveys a heat exchange agent to provide a power source for the steam turbine. An outlet of the draught fan is connected with an inlet of a gas mixer. According to the energy-saving and electricity-saving gas compression system, heat energy of the gas compressor is recycled through the heat exchanger and the steam turbine, so that the power and gas inflow of gas of the inlet of the gas mixer are improved, and the air displacement of an air compressor is increased. Energy and electricity are saved, and the energy-saving and electricity-saving effects are significantly effective.

Description

technical field [0001] The invention relates to an energy-saving and electricity-saving gas compression system. Background technique [0002] A gas compressor is a machine that compresses gas to make high-pressure gas to provide gas pressure energy, and is the main body of the gas source device. According to the working principle, the gas compressor has a volume type and a speed type. The former increases the gas pressure by compressing the gas volume to increase the molecular density, and the latter increases the gas pressure by increasing the gas molecular speed and increasing the molecular kinetic energy. At present, the commonly used gas compressors include screw type, piston type, centrifugal type, sliding vane type, scroll type gas compressor and so on. According to authoritative testing, only 10% of the electrical energy consumed by the gas compressor is converted into compressed gas, and the remaining 90% is converted into heat energy, and this 90% of heat energy is...

AI Technical Summary

Problems solved by technology

For gas compressors using traditional adjustment methods such as screw gas compressors, the energy consumption in the unloaded operating state is more than 20% of that in the full-load operating state, and some gas compressors even reach about 40%, accounting for the total energy consumption. 9%-18% of the consumption, the degree of waste is very serious

[0005] 2. The starting current is too large: the starting current of the gas compressor can reach 5 times to 7 times the rated current, and the impact on the power grid will easily lead to the instability of the power grid, and even threaten the stable operation of the electrical equipment, shortening the life of the gas compressor

[0006] 3. Low degree of automation: The adjustment of traditional gas compressors is realized by controlling the regulating valve and loading / unloading valve, which has the disadvantages of slow speed, unstable pressure, and low precision.

[0007] 4. Large amount of maintenance: due to the large impact current on the equipment when the gas compressor is started, the motor is subject to relatively large wear and tear, and the loading / unloading operation mode causes the components to perform repeated actions continuously, resulting in accelerated aging of the components and damage to the equipment. A lot of work to maintain

[0008] 5. Loud noise: continuous high speed, overload, loading / unloading, etc. cause the gas compressor to run costly and generate a lot of noise

[0014] 5. Reactive power compensation and energy saving: Gas compressors usually use asynchronous motors, and the power factor of asynchronous motors is relatively low, mostly between 0.2 and 0.85, which varies greatly with the change of load, and the energy loss is large

[0016] 7. Multi-unit group control energy saving: In the occasions where the gas consumption is large and the gas load fluctuates greatly, it is difficult to use a single large-capacity gas compressor to meet the needs of gas volume adjustment, and often use multiple gas compressors

However, the working medium of this gas compressor is condensing agent. Due to the limited injection power of the ejector, it cannot be applied to a gas compressor using air as the working medium, and it is difficult to achieve the effect of boosting.

In addition, the gas amplifiers or injectors commonly used in the above-mentioned gas mixers have the problems of large fluctuations, small exhaust volume, insufficient pressure and the inability to introduce external supplementary gas to increase the gas volume when they are used alone in a closed circuit, resulting in their scope of application being restricted. very restrictive

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