What are the reasons why the vacuum level doesn’t increase during vacuum pumping under reduced pressure?
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What are the reasons why the vacuum level doesn’t increase during vacuum pumping under reduced pressure?
Common faults of water ejectors and troubleshooting methods. Causes: 1. An increase in the alkalinity or acidity of the circulating water, resulting in the pore sizes of the porous plate or diffuser being reduced due to scale formation. 2. The temperature of the circulating water in the tank rises. 3. Pump failure: pressure drops suddenly and flow rate decreases. 4. System leakage. 5. The circulating water contains a large number of bubbles. Exclusion method 1: Clean with acid or replace the parts. 2. Adjust the pH level of the circulating water. Replace or add some circulating water to lower the water temperature. 3. Clean the scale or debris from the water pump impeller and inner casing. Inspect the system to find and fix leaks. 4. Install a baffle between the drain pipe and the water pump inlet pipe.
OP, what do you use to create a vacuum? Check if there is a problem with the vacuuming medium, and also examine the seal.
Summer: 1. The temperature at the top of the tower is high, preventing the oil and gas from being adequately cooled; this results in a high load on the vacuum pump and an inability to achieve the desired level of vacuum； 2. There are air leaks in the system. In winter: wax builds up in certain areas, preventing oil and gas from being removed.
It would be best to be more specific about your current situation: 1) Is vacuuming done by steam or mechanically?； 2) In operation status or under pre-operational pressure testing ； 3) Some specific parameters.
We use steam injectors.
My understanding is that if the poster is referring to experiments in a laboratory, the inability to achieve a high level of vacuum may be due to poor sealing of the equipment, resulting in air leaks. If the vacuum level in an industrial installation cannot be increased, it might be a problem with the pump or an issue within the process.
1# For Weilongwu, the following checks should be carried out: 1. Check whether there is any blockage in the pump, and remove any foreign objects if present； 2. The cooling efficiency of the water cooler needs to be checked ； 3. Check whether the steam contains water ； 4. The steam pressure should be no less than 7 kilograms ；
The main reasons why the vacuum level cannot be increased are: 1. Internal leakage in the system； 2. Issues with the vacuum pump ； 3. Is the water seal properly established? ； 4. Is the cooling effect good? ； 5. Is the back route unobstructed? ； Generally, it’s these main issues; they can be checked one by one! Many times it’s a process issue!
There are several reasons for vacuum extraction using steam: 1. The steam pressure must be at least 0.6 MPa. 2. The temperature at the top of the tower must not exceed a certain limit. 3. The processing capacity of the unit must not be overloaded. 4. The vacuum extraction system must ensure that there is no blockage in the pumps. 5. The vacuum distillation tower system must not leak. 6. The components of the raw material must not be too light. 7. The liquid level must not drop too low
I would like to add a few more points: 1. The temperature after cooling should not be too low; the water temperature in the cooler should not be too high, and the water pressure should not be too low. 2. The tank for products with reduced headspace should not be filled too full with oil, as otherwise a high back pressure from the vacuum pump will also affect the vacuum level. 3. Reducing the steam injection volume to the furnace tubes, or an excessive amount of stripping steam being used.