There is a certain difference between the pressure loss of the ventilation and dust removal pipeline and the calculation result, which is unavoidable. Therefore, the upper limit allowed in the design specification is 10%-15%. If you ignore this program calculation, it will have a major impact on the performance of the livestock fan and must be highly valued.
< p="">
1.The reason for the inaccurate calculation of the resistance of the livestock fan network is: pipe network resistance calculation Inaccurate, the resistance coefficient is inaccurate; the effective radius distribution of the system is unreasonable; the air intake conditions of the fan are determined to be inaccurate; the random selection criteria are unreasonable. Ion; neglecting the impact of construction supervision on site design changes during construction, resulting in errors in calculation results and actual losses exceeding 30% is even larger, causing the rated performance of the selected model to not match the actual running performance, which is inconsistent with the actual operation. Therefore, performance will change. If the calculated resistance is greater than the actual requirement, the flow caused by the operation of the centrifugal fan will significantly increase the actual power consumption. The result is that the efficiency in the whole pressure is reduced, and the rated power of the motor is easily overloaded, and there is a danger of burning the motor, but the influence on the flow variation of the full-pressure curve of the straight tilt is small; otherwise, the running flow is inevitably reduced, and the power consumption is followed. Reduced, the efficiency of the fan is reduced. At the same time, due to the decrease in flow rate, the flow rate in the pipeline of the dedusting system is reduced, which promotes the deposition of dust. These two conditions will make livestock and livestock fans in a state of light load, inefficiency and energy saving for a long time. 2.Selection of livestock fan Consequences of inaccurate total pressure level: Exhaust gas treatment, such as the negative pressure of the selected livestock fan, will destroy the normal heat balance. As the intake air volume increases, the temperature decrease will affect the combustion or heating, resulting in the loss of energy from the heat source. Increasing, when the fan discharges the dusty exhaust gas, the pollution source maintains a sufficient closed state to form a negative pressure state, which can effectively prevent the spread of harmful pollutants.
