Methanol wash chiller valve
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The cold intercooling pumps in the methanol washing process are equipped with cold machine valves, and the pumps at the bottom of the water washing tower also have anti-freezing valves (similar to the cold machine valves). Do you think it is necessary to install such valves on the pumps at the bottom of the methanol regeneration tower as well? ? ? What are the benefits? ?
I think it is necessary, as the temperature in regeneration towers is usually around 100 degrees. In winter, especially in the northern regions, the temperature of the pump body is generally below -10 degrees. Introducing methanol at such a high temperature could cause significant stress, which might damage the pump body! This post was last edited by z880347730 on 2009-4-6 23:14]
I think it’s necessary to have one that’s always in standby mode, so that once the operating pump fails, the backup pump can be started immediately! !
The pump at the bottom of the methanol regeneration tower is a heat pump; there is no need to install this valve! Of course, it would be better if it were set up!
The cold-zone pump is equipped with a cold-machine valve, and the hot-zone pump has a hot-machine valve, to prevent excessive stress from damaging the pump body when starting a backup pump. Generally, the cold-side valve and the hot-side valve of a standby pump are open, while those of the pump that is in operation are closed; otherwise, since the pressure at the pump outlet is higher than that at the inlet, opening the cold-side or hot-side valve will prevent the pump from delivering flow
The pump in the hot area, along with this, will prevent damage to the pump
Both cold pumps and heat pumps require this valve; its main purpose is to keep the pump in a standby state, so that it can be switched over promptly if there is a need to reverse the direction of operation, thereby avoiding significant fluctuations in the system
Pumps in the hot zone, like those at the bottom of the regenerator tower, do not require heat pump valves; it’s not really necessary to install them there~! Everyone thought of preventing the pump body from being at sub-zero temperatures during winter – is the pump in hot standby mode, right? There’s no backup option; one has to switch to the pump directly. Even when cooling down, it still takes extra time as part of the process of warming up the pump. So personally, I think it’s not necessary