Let’s discuss: the valves and pumps in the pipelines that transfer liquid ammonia from large storage tanks to smaller ones
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This post was last edited by Yan Qiusheng on 2010-7-3 at 14:56. Considerations need to be given to measurement issues, as well as the problem of discharging waste liquid from small storage tanks. Of course, safety issues arise during filling, and there is also the issue of handling waste ammonia. This involves pipelines, valves, and pumps
I wonder if the liquid ammonia tank of the moderator is the same one used in the ice machine Or a liquid ammonia storage tank for synthetic ammonia products?
Reply 2# HZG: Liquid ammonia storage tank for ammonia production
A reverse tank does not require a flow meter, as the ammonia tank itself has measurement scales. The discharge from the small ammonia tank should consist only of the oil contaminants at the bottom of the tank.
Our factory installs flow meters on the outlet pipelines of the liquid ammonia storage tanks; meanwhile, each small ammonia tank is equipped with an on-site level gauge. However, measurement is based on the flow meters. The control valves used are globe valves, all with a pressure rating of 4 MPa. During filling, it is pushed by the pressure of the liquid ammonia storage tank itself, with no pumps used.
Considering purity issues, the small storage tank must first discharge the waste liquid
Pumps are here because it is necessary to remove the residual liquid from the small storage tank, and the gas in it is removed using a vacuum pump?
Reply to 7# zhengrd: The gas in question is sent together with the vent gas to ammonia recovery, and then burned in a combustion furnace.
Reply to 8# Yan Qiusheng: Yes, these gases must be extracted
Reply to 9# zhengrd: Is there no pressure in your liquid ammonia storage tank? The pressure in our liquid ammonia storage tanks is generally between 2.0 MPa and 2.1 MPa. This way, there’s no need to draw.