Spiral plate heat exchanger to remove dirt or plate scaling
Remove dirt or plate scaling from spiral plate heat exchangers. For new systems, Murphy experts suggest that cleaning should be done once a week, depending on the actual situation. Clean plate surface scale (mainly CaCO3). When, choose to contain 0.3 sulfamic acid solution or containing 0.3 ullotopine, 0.2 aniline, 0.1 potassium thiocyanate 0.8 nitric acid solution as the cleaning solution, cleaning temperature 40 ~ 60℃.
Spiral plate heat exchanger without removing equipment for chemical immersion cleaning, attention should be paid to open the inlet and outlet of the heat exchanger cooling medium, or when the installation of the equipment is installed on the inlet and outlet of the medium over DN25 clean mouth, at this time should have good cleaning fluid injected into the device, wash clean with clear water after soaking should also be the residual acid, pH 7 or higher.
Spiral plate heat exchanger equipment in the disassembly for cleaning, pay attention to the plate in the cleaning fluid immersion 30 min, after should also pay attention to the use of a soft brush to brush the scale, after clean water. During the cleaning process, damage to plates and rubber pads should be avoided. If the method of non-disassembling mechanical backwashing is adopted, at this time, a tube port should be connected to the medium inlet and outlet pipelines in advance, and the equipment should be connected to the mechanical cleaning vehicle. The cleaning fluid should be injected into the equipment in the opposite direction of the medium flow. The cycle cleaning time is 1O ~ 15min, and the flow rate of the medium should be controlled at 0.05 ~ 0.15m /s.
After cleaning the spiral plate heat exchanger equipment, it is also necessary to circulate several times with clean water to control the Cl mass concentration in clean water below 25 mg/I.
The cleaning of dirt on the spiral plate heat exchanger, about its secondary circulating water good also should pay attention to the use of soft water after softening treatment, the general requirements of the suspension in the water mass concentration should not be greater than 5 mg/L, the diameter of impurities should not be greater than 3 mm, pH≥ 7. When the water temperature is no more than 95℃, the concentrations of Ca and Mg should be no more than 2 mmol/L. When the water temperature is greater than 95|C, the concentration of Ca and Mg should not be greater than 0.3 mmol/L, and the mass concentration of dissolved oxygen should not be greater than 0.1 Mg /L.
Spiral plate heat exchanger without removing equipment for chemical immersion cleaning, attention should be paid to open the inlet and outlet of the heat exchanger cooling medium, or when the installation of the equipment is installed on the inlet and outlet of the medium over DN25 clean mouth, at this time should have good cleaning fluid injected into the device, wash clean with clear water after soaking should also be the residual acid, pH 7 or higher.
Spiral plate heat exchanger equipment in the disassembly for cleaning, pay attention to the plate in the cleaning fluid immersion 30 min, after should also pay attention to the use of a soft brush to brush the scale, after clean water. During the cleaning process, damage to plates and rubber pads should be avoided. If the method of non-disassembling mechanical backwashing is adopted, at this time, a tube port should be connected to the medium inlet and outlet pipelines in advance, and the equipment should be connected to the mechanical cleaning vehicle. The cleaning fluid should be injected into the equipment in the opposite direction of the medium flow. The cycle cleaning time is 1O ~ 15min, and the flow rate of the medium should be controlled at 0.05 ~ 0.15m /s.
After cleaning the spiral plate heat exchanger equipment, it is also necessary to circulate several times with clean water to control the Cl mass concentration in clean water below 25 mg/I.
The cleaning of dirt on the spiral plate heat exchanger, about its secondary circulating water good also should pay attention to the use of soft water after softening treatment, the general requirements of the suspension in the water mass concentration should not be greater than 5 mg/L, the diameter of impurities should not be greater than 3 mm, pH≥ 7. When the water temperature is no more than 95℃, the concentrations of Ca and Mg should be no more than 2 mmol/L. When the water temperature is greater than 95|C, the concentration of Ca and Mg should not be greater than 0.3 mmol/L, and the mass concentration of dissolved oxygen should not be greater than 0.1 Mg /L.
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