Summary of the invention
The object of the present invention is to provide a kind of cleaning method of aluminum plate-fin heat exchanger, adopt the cleaning way of machinery, water under high pressure more to solve existing aluminum plate-fin heat exchanger, fragile part, affects the problem of heat exchanger quality and performance.
The object of the invention is to be achieved through the following technical solutions:
A cleaning method for aluminum plate-fin heat exchanger, comprises the following steps:
A, alkali lye preparation: choosing sodium hydroxide solution is alkali lye, and concentration is controlled at 12~15mol/L, and temperature is controlled at 60~80 ℃;
B, acid solution preparation: choosing salpeter solution is acid solution, and concentration is controlled at 8~10mol/L, and temperature is normal temperature;
C, degreasing: remove piece surface grease;
D, cleaning: the part after degreasing is immersed in sodium hydroxide solution, and the time is controlled at 40~180s, rinse with clear water after taking-up, and the part after rinsing is immersed in salpeter solution, and the time is controlled at 8~10min, takes out and rinses with clear water;
E, oven dry: the part after cleaning is dried.
Preferably, in described step c, part is immersed and is equipped with in the oil groove of kerosene, remove surperficial grease.
Preferably, the not clean place of part acetone soln wiped clean in described steps d.
Preferably, in described step e, adopt baking oven that part is dried, temperature is controlled at 80~100 ℃.
Beneficial effect of the present invention is: the cleaning method of described aluminum plate-fin heat exchanger is compared to the cleaning way of tradition machinery, water under high pressure, and it can part of damage, and can effectively remove the oil stain on part, and cleaning performance is good.
The specific embodiment
Below by the specific embodiment, further illustrate technical scheme of the present invention.
Embodiment 1
In the present embodiment, a kind of cleaning method of aluminum plate-fin heat exchanger, comprises the following steps:
A, alkali lye preparation: choosing sodium hydroxide solution is alkali lye, and concentration is controlled at 12mol/L, and temperature is controlled at 60 ℃;
B, acid solution preparation: choosing salpeter solution is acid solution, and concentration is controlled at 8mol/L, and temperature is normal temperature;
C, degreasing: part is immersed and is equipped with in the oil groove of kerosene, remove piece surface grease;
D, cleaning: the part after degreasing is immersed in sodium hydroxide solution, and the time is controlled at 40s, after taking-up, with clear water, rinses, part after rinsing is immersed in salpeter solution, time is controlled at 8min, takes out with clear water and rinses, not clean place acetone soln wiped clean;
E, oven dry: the part after cleaning is put into baking oven and dry, temperature is 80 ℃.
Embodiment 2
In the present embodiment, a kind of cleaning method of aluminum plate-fin heat exchanger, comprises the following steps:
A, alkali lye preparation: choosing sodium hydroxide solution is alkali lye, and concentration is controlled at 13.5mol/L, and temperature is controlled at 70 ℃;
B, acid solution preparation: choosing salpeter solution is acid solution, and concentration is controlled at 9mol/L, and temperature is normal temperature;
C, degreasing: part is immersed and is equipped with in the oil groove of kerosene, remove piece surface grease;
D, cleaning: the part after degreasing is immersed in sodium hydroxide solution, and the time is controlled at 110s, after taking-up, with clear water, rinses, part after rinsing is immersed in salpeter solution, time is controlled at 9min, takes out with clear water and rinses, not clean place acetone soln wiped clean;
E, oven dry: the part after cleaning is put into baking oven and dry, temperature is 90 ℃.
Embodiment 3
In the present embodiment, a kind of cleaning method of aluminum plate-fin heat exchanger, comprises the following steps:
A, alkali lye preparation: choosing sodium hydroxide solution is alkali lye, and concentration is controlled at 15mol/L, and temperature is controlled at 80 ℃;
B, acid solution preparation: choosing salpeter solution is acid solution, and concentration is controlled at 10mol/L, and temperature is normal temperature;
C, degreasing: part is immersed and is equipped with in the oil groove of kerosene, remove piece surface grease;
D, cleaning: the part after degreasing is immersed in sodium hydroxide solution, and the time is controlled at 180s, after taking-up, with clear water, rinses, part after rinsing is immersed in salpeter solution, time is controlled at 10min, takes out with clear water and rinses, not clean place acetone soln wiped clean;
E, oven dry: the part after cleaning is put into baking oven and dry, temperature is 100 ℃.
Above embodiment has just set forth basic principle of the present invention and characteristic; the present invention is not limited by above-described embodiment; without departing from the spirit and scope of the present invention, the present invention also has various variations and change, and these variations and change all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.