How to debug the system of stainless steel ventilation pipeline?

System debugging of stainless steel ventilation pipes mainly includes air leakage detection, air volume balance debugging and equipment operation debugging, etc. The following are specific debugging methods:

Air leakage detection

Light leakage method: at night or in a dark environment, place the light source inside the pipeline and observe whether there is light leakage on the surface and joint of the pipeline from the outside of the pipeline. If light is found, it means that there is air leakage here, which needs to be marked for subsequent repair. This method is suitable for the detection of ventilation pipes in medium and low pressure systems, and can quickly locate large air leakage points.

Air leakage test method: use professional air leakage test equipment, such as air duct air leakage tester. Connect the test equipment to the pipeline system, and measure the air leakage in the pipeline within a specified time by filling the pipeline with air with a certain pressure. According to relevant standards, judge whether the air leakage of pipeline system is within the allowable range. This method is suitable for ventilation piping systems with various pressure levels, and the test results are relatively accurate, but the operation is relatively complicated and needs professionals.

Air volume balance debugging

Measuring the air volume of tuyeres: Use anemometer or air volume hood to measure the air volume of each tuyere. When measuring, the anemometer or air hood should be placed in the center of the tuyere to ensure the accuracy of the measured data. Record the measured air volume value of each tuyere.

Adjust the opening of air valve: according to the design air volume requirements, adjust the air volume by adjusting the opening of air valves on each branch pipeline. For tuyeres with excessive air volume, turn down the air valve appropriately; For tuyeres with too small air volume, open the corresponding air valve. In the process of adjustment, it is necessary to measure and adjust repeatedly until the air volume of each tuyere reaches the deviation range of the design requirements. Generally speaking, the allowable deviation of the air volume of each tuyere in the ventilation system should not exceed 15% of the design air volume.

Balance the air volume of the system: while adjusting the air volume of the tuyere, we should also pay attention to the total air volume of the whole ventilation system. By adjusting the speed of the fan or the valve at the inlet of the fan, the total air volume of the system can reach the design value. In the process of adjustment, we should pay attention to the change of air volume at each tuyere to ensure that the air volume at each tuyere can meet the requirements on the premise of the total air volume balance of the system.

Equipment operation and debugging

Check the operation parameters of the fan: after starting the fan, use professional instruments to measure the parameters such as speed, vibration, noise and temperature of the fan. The rotating speed of the fan should meet the design requirements, and the vibration value should be within the allowable range. Generally, the effective value of the vibration speed of the fan should not exceed 4.6 mm/s.. At the same time, the noise of the fan during operation should be stable and there is no abnormal sound. When measuring the temperature of fan bearing, the temperature of rolling bearing should not exceed 80℃ and sliding bearing should not exceed 70℃.

Observe the connection parts of the equipment: check whether there is looseness, air leakage or abnormal deformation in the connection parts of the fan and the pipeline, the connection parts of the pipeline and the support of the equipment. If the connection parts are found to be loose, tighten the bolts in time; If there is air leakage, it is necessary to repair the seal or replace the sealing material; For the deformation of the equipment support, it is necessary to analyze the causes and take corresponding reinforcement or adjustment measures to ensure the safe and reliable operation of the equipment.

Test the performance of air conditioning units: If the ventilation system contains air conditioning units, it needs to be debugged. Check the cooling and heating effects of the air conditioning unit, and measure whether the temperature and humidity of the air supply outlet meet the design requirements. By adjusting the relevant parameters of the air conditioning unit, such as chilled water flow, hot water flow and fan speed, the performance of the air conditioning unit can reach the best state and provide a comfortable air environment for the room.