Problems with the function of the restrictor orifice plate in the return pipeline of large coal slurry pump
Thread Content
Excuse me: What is the role of the flow-restricting orifice plate in the return pipeline of the large coal slurry pump of the coal-water slurry gasifier? How are sizes calculated? This post was last edited by Konggu Jinsong on 2009-3-13 18:01 ]
1. Reduce the pressure on one side of the return valve2 and increase the outlet pressure of the coal slurry pump
In addition to what is said above, feeding back pressure can also be established when feeding the gasifier. Ensure that the coal slurry enters the furnace smoothly. The calculation may be similar to that of an orifice flow meter. This post was last edited by shanxg on 2009-4-2 20:28 ]
This post was last edited by GSP on 2013-9-17 14:20. The calculation may be related to the designed (or required) outlet pressure of the coal slurry pump before feeding. The outlet pressure = the gravity of the outlet coal slurry + the resistance of all pipelines. The pipeline resistance includes the resistance of the flow-limiting orifice plate. The outlet pressure of the coal slurry pump in our factory before feeding is less than 1MPa.
My personal understanding of the restriction orifice plate in the return line at the outlet of the large coal slurry pump is to increase the back pressure and ensure the outlet pressure before feeding. It seems to be related to the characteristics of diaphragm plunger pumps such as coal slurry pumps. Specifically, I just ask the master for more advice in this regard!
The main function is to increase the feeding back pressure,
Thank you for all the above answers, but I still feel not very satisfied. I would like to ask people who have unique insights in this area to answer, especially members of the technical team.
This post was last edited by GSP on 2013-9-17 14:21 1. It is certain to establish the back pressure when feeding. This function is very important and can make the coal slurry switch smoothly.； 2. It has a certain pressure reducing function. The outlet pressure of the coal slurry pump is relatively high, which is detrimental to the backflow to the slurry tank or trench. ； 3. The size of the opening can be calculated, but it may not be easy to use. The theoretical aperture is relatively small and prone to clogging. The original aperture can be increased based on the specific application and process conditions.
It seems that I have also seen a current-limiting venturi. Does it have the same effect?
What is the back pressure when establishing feeding? ? ? Beginners express their confusion and ask for answers.
;P;P In my personal opinion, although the use of flow-limiting orifice plates can increase the coal slurry pressure entering the furnace before feeding, the coal slurry pressure entering the furnace and the coal slurry velocity are all calculated based on the design of the coal slurry pipeline. Therefore, the size of the flow-limiting orifice plate is calculated by each factory or the same process. In my personal opinion, the flow-limiting orifice plate is easy to form a dead spot at the back, so it is better to consider a venturi flow limiter.
This post was last edited by limaolv1414 on 2013-9-15 23:27 to simulate the normal operation of the coal slurry pump after feeding into the gasifier. Feeding at half load, the orifice plate is made smaller, so that the pressure difference can be increased, allowing the pump to enter the feeding state in advance.
Limit the flow to increase the outlet pressure of the large coal slurry pump in preparation for feeding