Welding of concentrated cleaner exhaust effect on the velocity distribution on the exhaust purifier operation at the mouth of the effects is very big, such as when the velocity distribution is not uniform, air pollution will chase from inhalation of low wind speed area into the interior.
When the cabinet within the gas-collecting hood without calorific value (
Cold sources)
And harmful gas density is bigger, should not be commonly use upper exhaust, otherwise the operation on the edge of the wind speed is big mouth, mouth openings can be up to 150% of the average wind speed and operating the lower wind speed is low, as low as 60% of the average wind speed orifice, harmful gas will lower emission from the mouth.
In order to improve the situation, should exhaust point located in the lower part of the exhaust gas holder, the lower row of wind to sew on operation table lower exhaust slot is slightly higher than the operating mesa, so as to avoid inhaling air directly affect the work station of the reaction process.
When a certain heat generated by the process (
Thermal pollution)
And incase of a stream of natural to rise up.
If you still in the lower part of the exhaust, the heat flow may escape from the top of the port operation.
Therefore, must carry on the exhaust gas in the upper portion of the tank, heating element makes air currents to rise inside ark, and the wind deflector adjusting its exhaust air using the wind deflector can further improve air flow and ventilation effect.
Welding concentrated cleaner to generate heat contained in the company, in order to adapt to a variety of different process and operation situation, should be at the bottom of the cabinet gas mask on, are setting, exhaust and installing the regulator, so that the ark according to the change regulation of calorific value, lower the proportion of the exhaust air, also are the role of the upper and lower joint exhaust, make the operation of the velocity distribution is evener, this setting is the use of the characteristics of flexible exhaust, but more complex structure.
On bottom tuyere with fixed wind deflector, a third of the exhaust air from the upper row tuyere row, two-thirds of the exhaust air from the lower row tuyere row away.
By adjusting plate to adjust the air volume, lower airflow rate.
Ark is next three locations, which the exhaust of the seam, each equipped with air volume adjustment plate, can be adjusted according to different operation conditions, and to keep operating wind mouth evenly.
General article each exhaust the biggest open area of the seam are equal, and the ark after vertical to the cross-sectional area of 1/2, exhaust the seam of the wind speed generally take 5 ~ 7.
5m/s。
