This paper mainly introduces the present situation of energy utilization system of compressed air, compressed air through mining energy-saving potential system nine to introduce some compressed air system optimization measures can be taken, so as to reduce the loss rate of the compressed air, saving energy, increase the economic efficiency of enterprises.
Compressed air system is the fourth most widely used energy source in the industrial field, and it is also an expensive energy. Its energy consumption accounts for about 1%-40%. of its total energy consumption in most factories, especially for its high running cost and energy cost accounts for about 75%. The data show that: through energy saving transformation, such as pipe network optimization technology, frequency conversion technology, pressure control technology and central control technology, many compressed air systems can achieve more than 10% energy saving effect. Of course, each compressed air system is different, the applicable energy saving technology is also different. The application of technology should be based on the comprehensive analysis of the dynamic characteristics of the system. Blind implementation of the inappropriate energy saving technology is very difficult to achieve the expected energy saving effect. This paper introduces the compressed air system of Baosteel medium and heavy plate branch. Through comprehensive test and analysis, it puts forward the solution and achieves a certain energy saving effect.
Compressed air has 3 main uses. The power is compressed air as the energy source to complete the work. The technology uses compressed air and air as part of the technological process. The instrument air is stopped, and the operation of the mechanical equipment is started or adjusted. The production of compressed air equipment for air compressor, the raw material is air, through different processes to produce different functions of compressed air. In this production process, there are some waste phenomena. This paper aims to discuss how to reduce the waste of compressed air system and maximize the efficiency of the enterprise.
1 compressed air system by analyzing the present situation of Baosteel branch plate compressed air system 3 years operation analysis, the energy consumption of compressed air system is significantly higher than that of the actual amount of energy consumption, the leakage and the pressure fluctuation of the system is too large, the operating pressure of the pipe network, the improper use of approximately consumes about 50% of the compressed air the amount, as follows: the system flow test showed that in the draft production stops, the system still has the flow value, and relatively stable, which is part of the flow is basically caused by the leakage of the system.
The gas supply pressure and energy consumption system of compressed air system is proportional to the gas supply system, the higher the pressure, the air compressor energy consumption is larger, the compressed air supply pressure per 0.0iMPa air compressor energy consumption increases the minimum value of about 7%~8%. compressed air pressure fluctuation in the system must meet the needs of the most demanding pressure system, that is to say, the pressure of the system the minimum value is higher than the fluctuation process needs the maximal pressure. Through the analysis of system flow and pressure and the air compressor power curve as that of flow and pressure changes of the compressed air system is a dynamic process, the working state of the air compressor is not only low efficiency, but also lead to severe pressure fluctuation, which not only leads to the decrease of the system efficiency, and sometimes influence the reliability of the process and cause some scrap or process efficiency decreased.
13, when entering the compressor, the air moisture is nine, which affects the efficiency and quality of the compressor. From the point of view of energy saving and system reliability improvement, the more stable the system pressure is, the more reliable the system is, the higher the energy consumption of the system is, and the lower the energy consumption of the system is. The greater the range of the system pressure fluctuation means, the higher the average pressure of the system is, the higher the energy consumption of the system is. It can be seen from the curve of system pressure changing with time that the minimum pressure of the system is only 6 kilograms when the gas is in the highest state, and the highest pressure is up to 8 kilograms. The fluctuation range of the system pressure is as high as 2 kilograms, and the operation has been running in the pressure range of nearly 8 kg before. This indicates that the system has great energy saving space under the premise of meeting the technological requirements. It also indicates that the system gas supply pressure has certain reduction space under the premise of meeting all process requirements.
The leakage of the test system can be measured by the method of measuring the flow of the system directly, measuring the downloading cycle on the air compressor, and testing the pressure of the system. The system leakage control methods include the preventive leakage detection and maintenance, the application of the throttle equipment, and the cut off of the unnecessary gas supply.
The pressure loss of compressed air depends on the cross section area, velocity, length of the pipe, and the roughness of the inner surface of the pipe. The diameter selection proposal: air compression station and air compressor connected to the duct size when choosing the best guarantee of pipe flow velocity is less than 6m/s. away from the air compressor station to the main pipe size selection should ensure the compressed air flow rate is less than 9m/s. with gas branch pipe size selection should ensure the compressed air flow rate does not exceed 23 15m/s. for compressed air deal no matter what kind of structure type compressor, the air is inhaled impurities and their concentration several times. An air compressor with a rated gas output of 5m3/min +20 C, 70% relative humidity and 1 bar absolute pressure is input to the main line within 8 hours of running time, which is about 30 liters. About 20 liters of water to form condensed water accumulated in the cooler, after cooler of 7 bar gauge working pressure and outlet temperature of +30.C when the air is cooled further, the remaining 10 liters of water accumulated at the appropriate point in charge of air line. It is expensive to maintain, maintenance and production loss, by reducing the amount of moisture in the air in front of the compressor and refrigeration dryer, can reduce the cost of 5315.
When the system pressure is increased by 0.14bar, the system will consume 2% more compressed air. Increase the presence of the air system