If the vehicle is started after a short stop, what changes will occur in the system if the discharge valve at the bottom of the high-pressure washer is not closed? (CO2 stripping method)

It can be determined by the temperature difference of the hot water and the temperatures of the gas and liquid exiting the scrubber; if the vapor from the outlet of the synthesis tower is not absorbed in the scrubber, the pressure in the low-pressure absorption tower will be very high, and the temperature of the liquid exiting that tower will also increase

Due to the absence of co-current absorption and condensation heat release using ammonium hydroxide solution, heat exchange in the high-pressure temperature control system will decrease, causing the pressure in the high-pressure system to rise. This increases the load on the medium-pressure system; as a result, materials and heat are shifted to higher pressure levels, causing the medium-pressure system to experience overpressure as well. The increased concentration in the medium-pressure system leads to overloading in the low-pressure system as well, and ultimately, the concentration in the ammonia water tank rises sharply. The amount of water returning to the high-pressure system also increases. To maintain operation, the load continues to decrease, leading to a vicious cycle of disorder throughout the entire system. Last edited by ymtuegj12 on 2009-2-9 18:25.]

When starting the vehicle after a short stop, if the discharge valve at the bottom of the high-pressure washer is not closed, at least some of the ammonium methoxide solution will take an alternate route through that discharge valve (this is different if the valve is clogged with crystals!) ), the washing and absorption of exhaust gases from the urine tower in the high-pressure scrubber may be reduced, the opening degree of the high-pressure scrubber’s vent valve (HC202) increases, and even overpressure may occur in the high-pressure system. Another phenomenon is that, due to the reduced reaction heat, the temperature difference of the water entering and leaving the high-pressure washer decreases.

I haven’t encountered it, but I think that apart from a significant reduction in the load on the high-pressure washer and system overpressure, the temperature of the liquid coming out of the high-pressure washer will drop, while the temperature at the outlet of the injector will rise

I haven’t encountered this, but I think that a significant reduction in the load on the high-pressure washer causes the injector to draw in a mixture of liquid and gas, which leads to overpressure in the system

It can also cause the temperature and pressure in the high-pressure system to fluctuate in a sawtooth pattern due to evacuation by the injector.

In actual production, I have encountered situations where, in addition to the phenomena mentioned by Haiyou, there were also the following changes: 1. The liquid level in the synthesis tower fluctuated greatly. 2. The outlet temperature of the jet pump fluctuates greatly. 3. The pressure fluctuation in the low-pressure drum is very large. 4. The pressure fluctuation in the high-pressure circuit is very large.

What was said upstairs is very accurate. I’ll add a few words here: when starting up the equipment after a short shutdown, if the discharge valve at the bottom of the high-pressure washer isn’t closed in time, the most common consequence is that the temperature of the water used in this system doesn’t reach the desired level. Additionally, it becomes difficult to control the pressure in the high-pressure system; even after opening the exhaust valve of the high-pressure washer, the pressure still doesn’t meet the requirements for normal operation. In such cases, it becomes necessary to open the exhaust valve for the gas phase in the synthesis tower. At our facility, this problem has occurred before, but it was promptly detected and resolved thanks to the skillful actions of our experienced workers.

Because the absorbent solution has decreased. The gas phase from the synthesis tower does not absorb well. The high pressure is severely excessive; the 4 bar vent valve opens more, the temperature of the liquid at the bottom of the high-pressure washer rises, and the temperature at the outlet of the ejector also decreases.