Roll press steady flow bin frequent collapse should do?
Date：2019-10-09 16:53 Source：cementepcViews:
The capacity of the steady flow bin of the roller press is 30t. From the bottom of the bin to the feeding port of the roller press, manual rod valve (for maintenance), pneumatic rod valve (for emergency stop) and double-lever feeding device are arranged in order to adjust the feeding amount and improve the working effect of the roller press.Roll press steady flow bin frequent collapse should do?
1. Stable flow bin of roller press is formed
Roller press feeding device dynamic fixed roller adjustment plate and pneumatic valve if the opening on the normal opening, roller press frequent phenomenon of steady flow warehouse flat warehouse, material flow impact caused roller press roll gap to the biggest jump stop, main control parameters of the high and low, control could not control, forced to swing roller feeding device adjustment plate by 25% ~ 35% of the opening of the normal value close to below 9%, the adjustment of the fixed roller side plate by the opening of the normal value of 35% ~ 40% to below 20%.
This is only to maintain the roll press steady flow bin collapse times reduced, the roll press jump stop frequency decreased, but directly lead to the roll press no material, work effect significantly decreased;The current value of the cake elevator is reduced from the normal 140A to 100A.The output of grinding machine is reduced to 150t/h;There is serious ash on the feeding device platform of the roller press. Even if the central control increases the opening degree of the valve 1 of the circulation fan to the v-shaped powder separator from the normal 35% to 60%, there is still no obvious effect.
2. Emergency measures
Stop immediately for inspection.After the shutdown, = the technical staff has been on the roller press, v-type powder separator, cyclone cylinder, circulation fan and other system equipment for careful inspection, only in the inspection of v-type powder separator feeding mouth set the material plate, found that the part of the heat resistant steel scraper, rubber and other debris, blocking half of the feeding channel.After it is completely removed, the machine is started up and the operation of the roller press returns to normal. The curves of current, roller gap and pressure tend to be stable
Can't be removed in addition to the iron heat resistant steel cramp, rubber and other sundry entrance card blocked part of the material, block material bread hoist the material evenly dispersed whereabouts, but show makings cylindrical falling into the v-shaped classifier, shorting the cycle wind through the v-shaped classifier cannot take away the powder in the material well, a lot of material back in steady flow, which contains the fine material warehouse once again into the roller press, as is known to all, into two roller materials caused a large number of fine powder is warehouse, ash and collapse pressure, current, roll gap, the main reasons for the wide fluctuations when clearing points plate in card after plugging material, along the v-shaped classifier width screen to form,The fine powder in the material is fully collected into the mill to ensure the normal operation of the roller press.
3. Preventive measures
The theoretical analysis of the process fault is consistent with the actual representation before and after the fault treatment. In order to avoid similar phenomena again, we specially take the inspection of this part and sundry cleaning as a heavy content when the equipment is checked.At the same time, similar precautions were made at the source, such as requiring the kiln system to lay color strip cloth at the maintenance point to collect nails, bolts and other sundries to avoid entering the next process.
In the current cement combined grinding system, the stable and efficient operation of the roller press plays a vital role in improving the output of the mill and reducing the power consumption.