Why say closed cooling tower is energy saving and environmental protection equipment, more and more users are using this kind of equipment to replace the original equipment (open tower), we can through data analysis and comparison, the two energy data accounting can be obvious. Energy consumption is basically two major aspects, one is water, the other is electricity. Both are energy costs that no cooling tower can escape, unless you leave the equipment on.
First of all, look at the consumption of water. Water is generally consumed in two aspects. One is the flying overflow after spraying, and the other is the evaporation consumption of water.
Let's look at the open cooling tower, the spray water of the tower is basically between two and three percent of the overflow rate, if we according to the daily operation of 10 hours, excluding holidays, 280 days of operation. According to the actual open cooling tower flow of 6000 cubic meters per hour to calculate. 6000*2%*10*280= 336,000 tons of water, and the same closed cooling tower, its spray flying overflow is very small, because after all, the spray work is carried out in the tower, almost can be controlled in a few thousandths, we calculate according to 5 thousandths, the same is 10 hours of work, 280 days a year operation, To achieve the same cooling amplitude is basically 4,500 tons per hour of closed cooling tower is enough, then the calculation results: 4,500 *0.5%*10*280= 63,000 tons, it is not difficult to see, because of the different design structure caused by the waste of spraying water resources, more than 200,000 tons of terror. The bigger the pool of the open tower, the more wasted water, because the evaporation area increases, and the closed cooling tower has no pool, so the consumption here is zero. Judging from the price of a ton of water, just such a equipment, a year to solve the capital of hundreds of thousands of enterprises.
Let's look at the comparison of electric energy, electric energy is not different, because they are all through the same power equipment to operate the equipment, the power of the two is similar, the running time is the same, basically the energy consumption is about the same.
To sum up, for the closed cooling tower energy saving accounting can be strong to open the tower out, and, today are advocating energy conservation and environmental protection, this is the general trend, so the closed cooling tower is more and more favored by the majority of users.
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The lubrication method can be selected according to the specific conditions. (1) When the speed of the transmission system is low, grease lubrication can be used. (2) When the speed of movement is medium, it can be lubricated with thin oil splash. (3) When the movement speed is high, spray lubrication can be used. Properly configuring the position of the spray nozzle prevents noise generated by the gear pump oil. Bearing selection In the design of the transmission system, the type of bearing should be selected according to the speed, force and load characteristics of the shaft. In general, a properly pre-tightened tapered roller bearing can not only withstand large radial and axial loads, but also has a good damping effect and can increase the rigidity of the system, which is beneficial for reducing noise. Therefore, it is widely used in helical gear transmission systems. For ordinary drive systems, bearing noise does not become a major source of noise. However, in the transmission system of high-speed precision machine tools, bearing noise can not be ignored. When bearing noise becomes critical, choosing a low-noise bearing is more cost-effective than improving the accuracy of the bearing.
The motor selection motor is a separate exposed sound source. Generally, the noise of the medium and small power motors itself will not seriously affect the noise of the transmission system, but if it is installed improperly, it will cause severe vibration and increase the noise of the transmission system. For the flange type motor, since the motor shaft has a large jump on the end face of the mounting flange, when the motor shaft directly drives the gear transmission, the periodic variation of the gear meshing gap will be caused, and on the one hand, the gear noise will increase sharply, and the other The aspect also causes the motor bearings to be subjected to alternating radial forces. The greater the jitter error, the greater the radial force experienced by the motor bearings. Therefore, this type of use is extremely undesirable. Ideally, the motor shaft is coupled to the gear shaft supported at both ends by an elastic coupling. The elastic coupling not only acts as a vibration damping but also eliminates the influence of motor manufacturing errors on the transmission system. Motor noise is also related to the output rated speed. In the case of the same power, the 6-stage motor is 2~4dB lower than the 4-level motor. For gear transmission systems with low speed, try to use a lower-speed motor to reduce the system gear speed and reduce it. The overall speed reduction ratio makes the structure design more simple and reasonable. Reducing machine noise is a rather complicated problem. It is related to the design, accuracy, stiffness, vibration resistance and manufacturing process of the transmission system. You must pay attention to this problem from the beginning of the design, comprehensive consideration, and overall solution. If you don't pay attention to the design, it is often half the effort to find that the noise is too big to be remedied after manufacturing.