Alfa Laval heat exchanger plates cleaning process
(1) Firstly, according to the heat exchange area and scale thickness of the heat exchanger, calculate the amount of F2 stainless steel/aluminum special cleaning agent stock solution that needs to be prepared;
(2) According to the pipeline volume of the heat exchanger, prepare a container of cleaning agent that can meet the needs of circulation. The inner surface of the container must be clean and free of oxide layer or use a non-metallic container;
(3) According to the requirements of the internal circulation pressure of the heat exchanger, prepare a circulating industrial centrifugal pump, prepare the connection pipeline between the pump, the heat exchanger and the container, and make flange connections and connect the pipeline if necessary;
(4) Determine whether it is necessary to dilute the original cleaning agent according to the thickness of the scale layer or the cleaning time. The dilution ratio can be controlled between 1:1 and 1:5 according to the situation;
(5) Pour a sufficient amount of cleaning agent into the container to start the cycle cleaning of the heat exchange equipment. The heat exchange equipment does not need to be disassembled and can be cleaned online;
(6) During the cyclic cleaning process, due to the chemical reaction between the cleaning agent and the scale, obviously dissolved scale impurities and foam can be found in the solution tank;
(7) After cleaning for a period of time, test the cleaning agent with a pH test paper. If the pH value of the test result is higher than about 4~5, it is necessary to add an appropriate amount of the cleaning agent stock solution to continue cleaning. And timely change the inlet and outlet of the circulation pipeline for reverse circulation cleaning;
(8) The cleaning agent should be tested at all times during the cleaning process. When the pH value is kept within the effective range of 3 and there is no change for a long time, it means that the heat exchange equipment has been cleaned;
(9) Replace the clean water in the container for cyclic flushing and replacement to flush the peeled scale and other impurities remaining in the equipment. The flushing process also needs to change the inlet and outlet pipelines for repeated flushing.
alfa laval heat exchanger plates
(2) According to the pipeline volume of the heat exchanger, prepare a container of cleaning agent that can meet the needs of circulation. The inner surface of the container must be clean and free of oxide layer or use a non-metallic container;
(3) According to the requirements of the internal circulation pressure of the heat exchanger, prepare a circulating industrial centrifugal pump, prepare the connection pipeline between the pump, the heat exchanger and the container, and make flange connections and connect the pipeline if necessary;
(4) Determine whether it is necessary to dilute the original cleaning agent according to the thickness of the scale layer or the cleaning time. The dilution ratio can be controlled between 1:1 and 1:5 according to the situation;
(5) Pour a sufficient amount of cleaning agent into the container to start the cycle cleaning of the heat exchange equipment. The heat exchange equipment does not need to be disassembled and can be cleaned online;
(6) During the cyclic cleaning process, due to the chemical reaction between the cleaning agent and the scale, obviously dissolved scale impurities and foam can be found in the solution tank;
(7) After cleaning for a period of time, test the cleaning agent with a pH test paper. If the pH value of the test result is higher than about 4~5, it is necessary to add an appropriate amount of the cleaning agent stock solution to continue cleaning. And timely change the inlet and outlet of the circulation pipeline for reverse circulation cleaning;
(8) The cleaning agent should be tested at all times during the cleaning process. When the pH value is kept within the effective range of 3 and there is no change for a long time, it means that the heat exchange equipment has been cleaned;
(9) Replace the clean water in the container for cyclic flushing and replacement to flush the peeled scale and other impurities remaining in the equipment. The flushing process also needs to change the inlet and outlet pipelines for repeated flushing.
alfa laval heat exchanger plates