Common problems with cyclones
Writer： admin Time：2020-11-30 16:19 Browse：℃
Although the hydrocyclone is widely used in coal washing plants,its sorting effect is related to the feed pressure,particle size,concentration and the structure of the cyclone itself(diameter,cone ratio,bottom outflow,overflow,central pipe,etc.)Many factors are related.In addition to the classification operation in the grinding cycle,the hydrocyclone can also be used for desliming,dewatering,and removing flotation reagents.In addition,it can also be used for resuspension beneficiation,and its separation particle size can reach about 0.1 mm.After the hydrocyclone is successfully installed,it will start to run.There may be some problems during operation.The cyclone manufacturer will sort out the common cyclone problems for you one by one,and attach the reasons and solutions.I hope it helps.
In actual coal washing production,the production parameters that users often adjust include feed pressure,particle size composition,and feed concentration.The equipment parameters that are frequently adjusted include the diameter of the cyclone and the diameter of the underflow port.In actual production applications,we often need to adjust these parameters according to production needs in order to obtain the best sorting effect.
But when the relevant parameters are adjusted,how will the grading effect of the hydrolysis cyclone fluctuate,and what is the fluctuation range?Although there are a large number of complicated calculation formulas and theories,in actual production,there is not a set of systematic,complete,accurate and intuitive guiding opinions and data.
After the hydrocyclone is installed successfully,it needs to run for about 5-10 minutes under load.The purpose of this is to flush out the debris inside the cyclone.If you find a dripping place,tighten the bolts.At this time,we have to observe the working pressure of the slurry tank and the system.When both of them remain stable,the cyclone reaches normal operation.
Through the above steps,we can ensure that the hydrocyclone starts to operate.There are two points to pay special attention to during operation:1.The working pressure must be continuously stable within the required range,and the concentration of feed,overflow,and underflow must be Within the required range;2.The material balance calculation table and the classification efficiency of the cyclone can be calculated from the concentration and particle size composition of the feed,overflow,and underflow.
Possible problems and solutions during the operation of the cyclone:
1,the cyclone does not feed
Possible reasons:the pump is not plugged in,the inlet valve of the cyclone is not opened,and the pipeline before the inlet of the cyclone is blocked
Solution:check the power supply of the pump,open the inlet valve of the cyclone,flush the pipeline
2,the slurry tank overflows
Possible reasons:the volumetric flow rate of the feed is too large,the speed of the pump is too low,the lining or impeller of the pump is damaged,the slurry transportation pipeline is partially blocked,and the design size of the cyclone is too small
Solution:If it is a short-term negligible,increase the pump speed,replace the lining or impeller,flush the pipeline,check the accuracy of the design parameters
3,the slurry tank is evacuated
Possible reasons:the volume of the feed is too small,the speed of the pump is too high,and the design size of the cyclone is too large
Solution:if it is a short-term negligible,reduce the speed of the pump,check the accuracy of the design parameters
4,the pressure value fluctuates up and down
Possible reason:the slurry tank design is unreasonable,the solid material gradually decreases in the slurry tank,and the slurry entering the slurry tank varies greatly
Solution:correct the error in the design of the slurry tank,identify the cause,and make appropriate adjustments to the feed
5.Overflow concentration is too high
Possible reason:the water content in the slurry is too small
Solution:pour water into the slurry tank or overflow tank
6,the overflow concentration is too low
Possible reason:the water content in the slurry is too high
Solution:reduce the amount of water in the slurry tank
7.Underflow concentration is too high
Possible cause:underflow port size is too small
Solution:Increase the size of the underflow port
8.Underflow concentration is too low
Possible cause:the size of the underflow port is too large
Solution:reduce the size of the underflow port
9.The overflow particles are too large
Possible reasons:overload of grit nozzle,too large overflow,too high density of feed
Solution:increase the size of the grit nozzle,replace a slightly smaller overflow,reduce the feed density:add water or reduce the solid content in the slurry
10,overflow particles are too small
Possible reasons:the overflow is too small,the density of the feed is too low,the operating pressure is too high
Solution:replace a slightly larger overflow,increase the feed density:reduce the water volume or increase the solid content in the slurry,reduce the working pressure:reduce the water volume or reduce the number of revolutions of the pump
11,the undercurrent particles are too small
Possible reasons:the size of the grit nozzle is too large,the overflow port is too small,and the operating pressure is too high
Solution:reduce the size of grit nozzle,replace a slightly larger overflow,reduce working pressure:reduce water volume or reduce pump revolutions
12,the underflow particles are too coarse
Possible reasons:the overflow port is too large,the operating pressure is too low
Solution:replace a slightly smaller overflow port,increase working pressure:add water or increase the number of revolutions of the pump
13,the grit nozzle is spray-like
Possible cause:The grit mouth size is too large
Solution:reduce the size of the grit nozzle
14,the grit mouth is rope-shaped
Possible reasons:the size of the grit nozzle is too small,the grit nozzle is partially blocked,the slurry density is too low or the solid content of the feed is too high
Solution:Increase the size of the grit nozzle,stop the cyclone to clean up the blockage,if the phenomenon is short-term,it can be ignored.
The above are the common problems and solutions of cyclones in daily application introduced by Chaishang Trading Co.,Ltd.For other questions about cyclones,please refer to other content on this site,or call for detailed inquiries.