Method of deal with heat exchanger pressure
① clear flow heat exchanger plate in the dirt or scale, the new operating system, according to the actual situation cleaned once a week. Cleaning the surface of plate scale (mainly CaCO3.), The selection of amino acid solution containing 0.3 or 0.3 Wu Luotuo with flat, 0.2 aniline, 0.1 0.8 nitric acid solution of potassium thiocyanate as a cleaning fluid, cleaning temperature 40 ~ 60 ℃ . Does not remove chemical immersion cleaning equipment,heat exchangers, the heat exchanger to the cold medium into the open, export, or install equipment in the medium inlet and outlet DN25 clean install over the mouth, with a good cleaning fluid into the device, after soaking acid residue with clean water, so pH ≥ 7. Open clean when plate immersed in the cleaning solution 30 min, then brush lightly with a soft scale, and finally wash with water. Cleaning process to avoid damage to plates and rubber mats. If using non-mechanical backwash removal method, should advance in the medium inlet and outlet pipes on the road take a mouth, the car wash equipment and machinery connected to the cleaning fluid flow in the opposite direction by the media into the heat exchanger equipment, cleaning cycle time 10 ~ 15 min, flow rate controlled at 0.05 ~ 0.15 m / s. Final rinse cycle a few times, so that water quality in the Cl concentration at 25 mg / I or less.
② After the second best use of recycled water softening treatment, the soft water generally require the concentration of suspended solids in water less than 5 mg / L, the diameter of impurities is not greater than 3 mm, pH ≥ 7. When the water temperature is not greater than 95 ℃,, Ca, Mg concentration should not exceed 2 mol / L; when the temperature was 95C ℃ when, Ca, Mg concentration should be less than 0.3 mol / L, dissolved oxygen concentration should not at 0.1 mg / L.
③ For the concentrated heat exchanger heating system, water can be used once to the second method.
Heat exchanger article: http://www.whreactor.com/
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