Questions about the installation of burst discs in hydrolysis mixing tanks?
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The rupture disc of a hydrolysis stirred tank is connected to a nitrogen pipeline at one end and to the tank body at the other end. Is this design of the burst disc intended to prevent negative pressure in the tank? If that’s the case, are there any requirements regarding the pressure on the positive pressure side? The instructions for the rupture disc state that the pressure should be 100 kPa upstream of the rupture disc and -3 kPa downstream. Does this mean that the rupture disc will also burst if the pressure exceeds 100 kPa after the nitrogen pressure regulator? Please provide your insights, fellow sailors.
Above 103 KPa, it will explode
After blasting, nitrogen is directly introduced into the mixing tank. If the pressure is already high, why is more nitrogen still added to it?
What is the design pressure of this tank? -Can’t it even withstand 3 kPa? Why not use a nitrogen seal to prevent negative pressure? Also, have you found a suitable supplier for burst discs with such small differences in pressure in kPa?
-3 kPa is tolerable; the main concern is a flash explosion caused by the mixing of incoming air with the internal gases.
What a strange setup – is it intended that the operating pressure inside the tank be positive, with explosion occurring when the negative pressure difference inside the tank reaches 103 kPa? Why is the negative pressure inside the tank set at such a low value of -3 kPa? Won’t it cause the tank to explode if there is rain and atmospheric pressure drops during maintenance work?
It should be a requirement related to the process operation control parameters, aimed at preventing the vacuum level in the tank from exceeding 3 kPa.