Commissioning operation of centrifugal refrigeration unit in clean room workshop
Commissioning and operation of centrifugal refrigeration unit in clean room pharmaceutical cleanroom
Before the test run of the clean room centrifugal refrigeration unit, the machine room should be cleaned, the ventilation is in good condition, and the chilled water and cooling water have passed the water test; The setting data is correct, the system simulation...
Text label: clean room centrifugal refrigeration unit, commissioning operation, purification plant commissioning and installation
Commissioning and running of centrifugal refrigeration unit in clean room workshop
Before the test run of the clean room centrifugal refrigeration unit, the machine room should be cleaned, the ventilation is in good condition, and the chilled water and cooling water have passed the water test; The setting data is correct, the system simulation action is correct, the oil circuit of the lubricating system is correct, and the system has been tested for air tightness; close the guide vanes of the compressor suction port, remove the condenser and evaporator inspection ports, and make the compressor exhaust The port is connected to the outside world; start the water pump and oil pump, discharge the air in the system, the water supply flow meets the design requirements, and also open the cooling water inlet and outlet valves of the motor water jacket; Officially start the compressor to run for 0.5h, check the oil temperature, oil pressure and the operation of the friction parts, and confirm whether the vibration of the equipment exceeds the standard requirements.
Before the unit load test run, the oil pump lubrication system, chilled water and cooling water system should have no-load test run conditions, the float ball in the float chamber should be in working state, the suction valve and guide vane should be closed, and each adjustment The instrument and indicator system should be normal, and the air in the system should be removed by the air extraction and recovery device, so that the unit is in a ready state for operation; when the unit is put into operation, first manually start the main motor, and then gradually open the suction valve and energy according to the operation of the main engine. Adjust the guide vane; continuously adjust the guide vane to 30%-35% to make it quickly pass through the surge area. After checking that the current of the main motor and other parts are normal, in order to increase the unit load, continue to increase the opening of the guide vane, continuously The operation should be no less than 2H, the opening and closing of the guide vanes should be flexible and reliable, and the opening degree and the indication value of the instrument should be adjusted according to the requirements of the technical documents; during the continuous 4H process of automatic start-up operation, the oil pressure and oil temperature of the unit should be checked and recorded. , evaporation pressure, condensing pressure, working state of float, guide vane opening, main motor current change, chilled water and cooling water temperature changes, all data should meet the requirements of equipment technical documents, such as normal continuous operation for 8-24H; During the load test operation, the power supply system is easily cut off due to the excessive starting current of the main motor, so that the main motor and the oil pump motor are powered off at the same time. Therefore, in the process of trial operation, it is more appropriate to set up another circuit power supply for the oil pump; after the manual start of the main motor runs normally, test the effect of automatic start again. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for clean rooms and purification plants.
Air load test run First close the guide vane of the suction port of the compressor, remove the cover plate of the float chamber and the sight hole flange on the evaporator, the suction and exhaust ports should be connected to the atmosphere; supply cooling water as required; start Check the motor, the steering should be correct, and there should be no blockage in rotation; start the oil pump and adjust the lubrication system, the oil supply is normal; start the compressor, when the motor of the unit is cooled by water, its continuous running time should not be less than 0.5H, When the motor of the unit is cooled by fluorine, its continuous running time should not be more than 10min. At the same time, check the oil temperature, oil pressure, the temperature rise of the bearing part, and the sound and vibration of the machine are uniform and normal; the opening of the guide vane should be adjusted. , The opening and closing of the guide vane should be flexible and reliable. When the opening of the guide vane is greater than 40%, the test operation time should be shortened. After the vacuum test is qualified, the system can be used for charging. The amount of refrigerant charged must meet the standard requirements, and a drier filter should be installed on the liquid charging pipe to prevent water from being brought into the tank when the refrigerant is charged.
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