What are the reasons why the urea vent main pipe is filled with liquid?

1. Urea plant process: It is an aqueous solution 2. Liquid filling occurs in the vent main pipe, but not often 3. Analysis of the reasons for liquid filling: The tail suction pump is broken, switch to the analytical pump (the outlet is fully open, the flow rate is larger than the tail suction pump). 4. The preventive measure taken is to turn down the outlet of the desorption pump to adjust the appropriate flow rate.

1. Urea plant process: Aqueous solution 2. The reason why the vent main pipe has been filled with liquid: A section of the overpressure tail suction tower absorbs too much, the inert scrubber explosion-proof plate ruptures, etc. This post was last edited by 1025199692 on 2009-3-9 21:03 ]

1. Urea plant process: CO2 stripping 2. Does the vent main pipe sometimes contain liquid? 3. Analysis of causes of liquid entrainment: Low pressure and overpressure, low pressure liquid level tank full, desorption overpressure, reflux liquid level tank full, high pressure and overpressure vent valve opening wide 4. What are the preventive measures to be taken? Prescribe the right medicine

1. Urea plant process: Ammonia stripping 2. The vent main pipe sometimes contains liquid. 3. Analysis of causes of liquid entrainment: There is a problem with the internal distribution cap of the medium-pressure inert scrubber or the cooling is not good (inert scrubber scaling, internal leakage, etc.), resulting in poor absorption of the exhaust gas and the absorption liquid brought out by the vent pipe. The cooling effect of the ammonia cooler is not good, and the medium pressure is overpressured, resulting in a large vent volume. The absorption liquid is brought out with the vent pipe, and the absence of absorption liquid in the inert scrubber further causes medium pressure overpressure, leading to a vicious cycle, increased ammonia consumption, and system fluctuations. This is especially true in summer. 4. Preventive measures taken: The key is to analyze the reasons clearly and then you can solve them.

1. Urea plant process: Aqueous solution 2. The vent main pipe is filled with liquid. 3. After searching, it was found that the medium-pressure saturated steam leaked into the steam expansion tank of the one-stage tower. The expansion tank was automatically vented and connected to the main vent pipe, causing the saturated steam to enter the vent main pipe. After the vent main pipe was decompressed and cooled, the steam condensed, forming the main vent pipe with liquid. 4. The valve that cuts the medium-pressure saturated steam to the first expansion tank has not had liquid in the main vent pipe in the past three years.

1. Urea plant process: Ammonia stripping 2. The vent main pipe sometimes contains liquid (V105 ammonia introduction). 3. Analysis of causes of liquid entrainment: When V105 introduces ammonia, the V105 on-site glass plate liquid level gauge does not match the actual liquid level, and the liquid level in the general control room cannot be seen until the V105 liquid is full and brought from the inert wash tower to the vent tube. 4. Preventive measures taken: Drain the water, calibrate the liquid level gauges on site and in the main control room (calibrate several times during the ammonia introduction process), contact the main control room and the site frequently, and pay attention to the pressure changes in the ammonia system.

1. Urea plant process: It is an aqueous solution. 2. Is there any liquid in the vent main pipe? It doesn’t happen often, sometimes it happens while driving. 3. Analysis of the cause of fluid leakage: Medium pressure and overpressure 4. What preventive measures are taken? During driving, adjust the indicator within the indicator range in time to avoid overpressure. This post was last edited by lxq700918 on 2009-2-25 17:59 ]

1. Urea plant process: It is the full circulation method of aqueous solution 2. Liquid filling phenomenon often occurs when venting the main pipe 3. Analysis of the reasons for liquid filling: The condensate tank and the vent main pipe are connected together 4. Precautionary measures to be taken: Controls the condensate tank level.

1. Urea plant process: Full circulation method of aqueous solution 2. Liquid loading sometimes occurs in the venting main pipe 3. Analysis of reasons for liquid loading: The tail suction tower is filled with liquid (the outlet valve of the tail suction pump is opened too wide, the liquid is not flowing smoothly into the tail suction tower, the demister of the tail suction tower is broken, the height of the nozzle entering the tail suction tower is not high enough from the packing in the tower), discharge from the first suction tower 4. We have solved it. measures taken: Thicken the lower liquid pipe of the tail suction tower by 8 meters from top to bottom, for example, from 32 to 76 meters. Lower the "U" type pipe of the lower liquid by 300 to 500 meters, and reduce the height of the packing layer to ensure that the height of the nozzle from the packing in the tower is 600 meters. In this way, the outlet valve of the tail suction pump can be fully opened and the tail suction tower will not be filled with liquid, and the vent main pipe will not be filled with liquid. Of course, a suction tower cannot discharge it.

The condensate tank and the vent main pipe are connected together. Will ammonia flow into the condensate tank?

1. Urea plant process: It is an aqueous solution. 2. The vent main pipe is filled with liquid.: But not often, and the amount is not large 3. Analysis of causes of fluid retention: The tail suction tower has no defoaming device. 4. Preventive measures taken: Operate the medium pressure smoothly and release the pressure as slowly as possible.

1. Urea plant process: It is an aqueous solution. 2. There is almost no liquid in the vent main pipe. 3. Analysis of the reasons for the liquid.: The tail suction pump of our unit has relatively large vibration. Generally, a desorption pump is used instead of the tail suction pump. 4. Bold the vent main pipe.

1. Urea plant process: CO2 stripping 2. Liquid entrainment occurred in the vent main pipe 3. Analysis of the causes of liquid entrainment: The liquid in the vent tube is not flowing smoothly, and the gas phase valve position of the low-pressure system is too wide. The condensate tank is under pressure 4. What are the preventive measures to be taken?: Control the liquid level and pressure of low-pressure liquid level tank. Replace the air outlet pipe of the condensate tank. The drain line of the vent barrel is thickened.

This post was last edited by lxq700918 on 2009-7-29 22:08 12# 1025199692 There is a high chance that ammonia nitrogen will be brought into the condensate~! It is recommended to change it