Dust problem in crusher production and improvement measures
Date：2019-08-13 15:40 Source：未知Views:
In the production process of stone processing and other mining resources, a large amount of dust will be produced, which not only pollutes the environment but also causes great harm to workers' health. Therefore, it is very necessary to find a solution to dust in the processing process of stone production line.
At present, in the production of crusher, there are still some problems in dust removal, mainly:
1) the selection of the filter area of the bag dust collector is too small, and the actual air extraction volume is insufficient. It is difficult to form micro-negative pressure in the dust removal hood of the feeding port of the crusher and the crusher cavity, resulting in large dust in the post environment.
2) when the humidity of the broken material is high (after rain or after water dripping), the dust particles entering the dust collector are thicker than those entering the dry material. Bag type dust collector is easy to paste the bag, and the material feeder is easy to be blocked. As a result, the ventilation resistance of bag type dust collector increases greatly, the ventilation capacity decreases, and the dust is serious.
3) when dust enters the pipe of the dust collector, the elbow at the inlet pipe increases the resistance of the system, and the elbow is easy to be worn and blocked by dust.Adopting spiral conveyer and dividing wheel to transport dust collected by bag-type dust collector, the power consumption increases and the workload of mechanical maintenance increases.Often need to remove the dividing wheel under the material, over time, under the material flange air leakage, increased dust hopper air leakage.
4) during the falling process of the materials on the belt conveyor, air and materials enter the closed dust removal cover together, and the dusty gas diffuses to the outside of the cover through the cracks and holes in the cover wall, polluting the environment.In addition, as a result of belt machine corner dust collection point is not appropriate, dust collector on and off the lower level of the belt machine dust almost no impact.Therefore, no. 5 broken stone machine operation, the dust collector has not run, the lower belt machine has been in the dust in the air, its process layout transformation before the belt machine corner dust removal process layout
5) in order to reduce the dust caused by the shell air leakage of the crusher, in the actual production, when the material is dry, it often dashes water at the entrance of the crusher, which results in aggravating the filter bag paste bag of the bag filter and the clogging of the feeder.Because the bag dust collector is intermittent dust cleaning, when the dust collector works normally, the air leakage of the partition wheel is also a problem that cannot be ignored.
6) there are many faults in the bag filter and its accessories, which not only affect the normal dust removal, but also increase the maintenance workload of the equipment.From the statistics of equipment overhaul, the poor quality of equipment parts is the main cause of equipment failure.
In view of the existing problems, some technical measures need to be improved:
1) change the bag dust collector in the corner of crusher and belt conveyor to lngm64-4 and lngm4-8 respectively.According to the characteristics of dust, water repellent and oil repellent filter material is adopted.Lngm4-8 bag filter is arranged in the open air, and its shell is treated with heat preservation and waterproofing.In order to ensure the reliable operation of the equipment, attention should be paid to the brand, specification and model when purchasing the key parts of the bag filter, so as to reduce the failure rate of the equipment.
2) improve the technological layout of bag dust collector, and arrange the dust collector of rock crusher according to the direction of belt conveyor;The standard dust bucket of bag dust collector is transformed into double dust bucket structure, thus eliminating one screw conveyor and raising the bag dust collector, which is beneficial to the layout of air inlet pipe (the Angle of air pipe is large);The air inlet is set in the air inlet box, so that the dust from the discharge port of the crusher directly enters the air inlet box of the dust collector, which saves the elbow, reduces the resistance of the system and improves the dust collecting efficiency.The single-layer flap valve is used for the gray bucket lock, eliminating the separator wheel feeder and its motor, reducing the secondary dust and improving the dust removal effect.
3) dust on the corner of the belt machine is restricted by the field conditions, the chute and dust cover cannot be changed, the dust removal process is arranged in the form of collecting, make the dust cover in the state of slight negative pressure, to eliminate dust on the belt machine.
4) according to the need to be conducive to the service life of filter material and pulse valve, and to take into account the dust at the dust bucket, in order to improve the comprehensive dust removal effect of crusher and belt machine, when crushing dry materials, can be appropriate in the crusher material entrance dush water (10 ~ 20min after the crusher).
5) strengthen the management of dust removal equipment, check the tightness of dust removal hood regularly, and deal with problems in time.Carry out objective management assessment on the post environment and dust emission of bag dust collector, conduct dust monitoring regularly, use economic lever to mobilize the working enthusiasm of post personnel, improve the maintenance level of dust removal equipment, and minimize dust pollution.
After the improvement of technical measures, dust removal effect and experience:
1) after the transformation, the crusher and belt machine corner of the environment to meet the design requirements, dust discharge can hardly be seen at the exit of the dust collector.The equipment has not been maintained for more than 3 months.
2) no bag-paste phenomenon occurs in the filter material of 2 bag-filter.
3) need to pay attention to, dust cover dust curtain structure has a great impact on the dust removal effect, dust curtain can not use an old belt to hang, should be the old belt cut into 15 ~ 20mm wide, 1/4 of the superimposed into a curtain, which is not only convenient for the belt machine material traffic, and have good airtight performance.
In order to ensure a good working environment, in addition to strengthening the maintenance of dust removal equipment, it is necessary to maintain the cleaning and sanitation of the working position and crusher equipment.For more information about cement production line, please consult our customer service or leave a message. We will reply to you as soon as possible.