Smoke devices:

     Exhaust device selection should not only play the role of smoke, but also taking into account the ease of operation.

     Suction hood should be in accordance with the size of the quenching tank section to select, compare the characteristics of several suction hood, choose the side packets suction type tank cover is more appropriate, small footprint, suction hood on the height of the quenching bath is small, the effect is better. When the cross section is larger, should choose the side blowing smoke suction tank cover, but this approach is more complex and need to increase the amount of suction should not be used.

     Fumes can be set as needed by recovery, both recovered oil, but also protect the environment.

. Fire-fighting equipment:

Quenching tank used in fire extinguishing system for the automatic fire extinguishing installations nitrogen. The working principle is: shown in Figure 4, Figure 5, when the work piece is quenched into the oil, causing an instant flames, the fire extinguishing device does not start, only when the flame burned at the suction inlet placed in the flame detection electrode (when exhaust system is working), the electrode to generate electrical signals, transmitted via dedicated cable flame detector, the output control signal to the solenoid valve nitrogen pipeline moves from the upper part of the distribution in the quench tank nitrogen spray jet nozzle, the oil surface the formation of nitrogen curtain to fire purposes. Nitrogen in the jet exhaust fan when the chain off, so nitrogen is discharged, affecting fire effect. In the square tank, the jet nozzle is usually placed on the long edge, staggered distribution, each side 2-4, according to the alongside of the decision. If the pit is evenly distributed in the circular tank, the spray should be under certain angle, slightly off-center so that the formation of vortex-like flow.

. Utilization of waste heat:

     For the rational use of energy, the hot air in the air cooler outlet pipe set links, and converted with a manual butterfly valve to the flow of hot air. Quenching medium in the summer to be directly discharged heated air

     placed outdoors in the winter the hot air through the discharge valve plate to the interior, for the hot air heating.

 



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