1. The influence of the molekuler saringan adsorpsi jumlah on the life of the insulating glass.
The adsorption capacity of the insulating glass drier should be based on the adsorption capacity of 10% relative humidity. The adsorption capacity when the relative humidity is high cannot be used as the standard for detecting the dew point control ability of the desiccant, so only the relative humidity is 10%. The adsorption capacity can reflect the number of years that the molecular sieve can guarantee the service life of the insulating glass. Some desiccant instructions only mention the amount of adsorption, and do not speak the test conditions, in fact, it does not make any sense. For example, compared with the molecular sieve desiccant, the silica gel desiccant has a low depth adsorption capacity, but its shallow adsorption capacity is large. For example, the C-type silica gel desiccant can absorb three times its own weight at a relative humidity of 90% at 30 degree C. It is unmatched by molecular sieves under the same conditions. But what is the significance of such a high adsorption capacity for insulating glass? Because the temperature inside the hollow glass is filled with water vapor under such conditions, the adsorption capacity at 10% relative humidity is the life of the insulating glass. The most important indicator to be measured, the adsorption capacity at other high relative humidity cannot measure the dew point control ability of the desiccant in the dry environment of the hollow glass.
2. The meaning of burning loss and the actual significance.
3. The meaning of temperature rise and test methods.
Strictly speaking, temperature rise is not a technical indicator, but a commercial indicator. The increase in temperature after water absorption is an important feature of molecular sieves, but it is not a unique feature of molecular sieves. If the temperature of a desiccant rises, it may be a molecular sieve, calcium chloride, calcium oxide or a strong acid strong base desiccant. In this way, it can be judged whether or not its aqueous solution is corrosive. Even if we exclude other corrosive desiccants, we still can't distinguish between 3A molecular sieves and 4A molecular sieves, so there must be an instrument that tests the inspiratory volume to test the molecular sieves of type 3A or 4A before finalization. Therefore, using the temperature rise method alone to judge the quality of the hollow glass desiccant does not have much practical significance. It is necessary to judge the quality of the desiccant in terms of the pH and irritant characteristics (corrosiveness) of the test aqueous solution and the venting amount of the test desiccant. Good or bad. Under the premise of no corrosiveness and qualified gas release, the higher the temperature rise, the better the quality of the desiccant, and the longer it takes to ensure the dew point life of the hollow glass.
Pertama, the temperature rise cannot be measured by the volume method. The adsorption amount of the desiccant is calculated according to the weight. The temperature rise is an indirect rough method for testing the water absorption capacity of the desiccant. The amount of water is mixed to test the temperature rise, and the higher the density of the desiccant, the higher the temperature rise. Karena the volume is the sama, ada adalah lebih dari the massa, dan the molekuler saringan desikan dengan the sama adsorpsi kapasitas has a tinggi densitas dan a rendah suhu naik. Oleh karena itu, it is wajar untuk uji suhu naik oleh the gravimetri uji.
Kedua, it is not possible to test the temperature rise by adding water and then adding molecular sieve. The molecular sieve has a bulk density smaller than that of water, and the molekuler saringan has a lower density. The longer it floats on the water surface, the slower the speed of falling from the water surface. The whole heat dissipation time is elongated, and the heat dissipation time is not concentrated seperti mereka molekul saringan dengan tinggi kepadatan. Oleh karena itu, jika the suhu adalah meningkat oleh menambahkan the air dan kemudian menambahkan the molekul saringan, the molekul saringan dengan the sama adsorpsi kapasitas akan memiliki a lebih rendah kepadatan dari the molekul saringan dengan a lebih rendah kepadatan. Oleh karena itu, the test temperature rise should be tested by adding a molekuler saringan dan kemudian menambahkan air.
Sekali lagi, the temperature rise is also related to the following factors:
(1) The smaller the molekuler saringan partikel ukuran, the higher the temperature rise;
(2) 4A molekul saringan is lebih tinggi dari 3A molekul saringan;
(3) The lebih baik the isolasi of the test container% 2c the higher the temperature rise;
(4) Itu bahan dan bentuk dari wadah are berbeda% 2c yang mempengaruhi suhu naik hasil% 3b
(5) The temperature of the water mempengaruhi the temperature rise;
(6) Itu posisi dari tes titik tidak tidak mempengaruhi suhu naik;
(7) Sensitivitas dari termometer tidak tidak tidak mempengaruhi suhu naik% 3b
(8) Itu perbedaan in molekul saringan dan air mempengaruhi suhu naik (bahkan jika rasio adalah sama sama).
Untuk membuat pengukuran dari suhu naik a referensi nilai% 2c Anda harus memastikan bahwa% 3a
(1) Semua adalah 3A molekuler saringan;
(2) the size of the partikel size is close;
(3) using the same temperature rise tester;
(4) Test with the correct method.
Hanya di bawah ini prasyarat, the lebih tinggi suhu naik% 2c the lebih baik the desiccant, the more beneficial to improve the service life of the insulating glass.
