In the election in the coal plant, coal preparation equipment if a failure occurs, the system will lead to the production of parking, great loss. Mastering the treatment methods for common faults in coal preparation equipment, timely discovering hidden dangers of equipment, and carrying out effective maintenance and treatment are the guarantees for safe and efficient operation of equipment in coal preparation plants. This topic selects common faults and treatment methods for several equipment commonly used in coal preparation plants.
First, sorting equipment
Sorting equipment refers to the assembly of mechanical equipment that separates various components in the material during sorting operations. Common equipment used in coal preparation plants include jigs, mediation only sorting machines (machines), flotation machines, etc.
1, jig
According to the structural position of the air chamber, the jig can be divided into a sieve side air chamber jig and a sieve air jig. The common models are SKT series jigs. The structure is as follows:
★ Common troubleshooting:
2, heavy medium sorting machine
Heavy medium sorting equipment can be divided into heavy medium sorting machine (heavy medium sorting machine) and heavy medium cyclone. The heavy medium sorting machine has a sorting tank and a vertical wheel (slanting wheel) sorting machine. The heavy medium cyclone has two products: Luoqi, a three-product cyclone without pressure, a three-product cyclone with pressure, and a heavy medium. There are 4 types of cyclones, each of which is divided into two types: integral casting and wear-resistant lining.
★ Common troubleshooting:
3, flotation machine
According to different ways of inflating the slurry, the flotation machine is divided into two types: mechanical agitation and no mechanical agitation. A commonly used flotation machine is a mechanical agitation flotation machine.
★ Common troubleshooting:
Second, graded dewatering equipment
1, vibrating screen
The grading and dewatering equipment commonly used in coal preparation plants includes vibrating screens, centrifugal dewatering machines, filter presses and filters. For the dewatering of coarse-grained materials, vibrating screens and centrifugal dewatering machines are often used. For fine materials, such as flotation of clean coal and tailings, filters and filter presses are generally used.
★ Common troubleshooting:
2, centrifugal dehydrator
The centrifugal dehydrator is in the form of centrifugal filtration and centrifugal sedimentation. The filter centrifuge has two kinds of vibration centrifugal dewatering machine and spiral discharge centrifugal dewatering machine. Screw discharge centrifugal dewatering machine, the structure is as follows:
★ Common troubleshooting:
3, filter press
The filter press is divided into a box filter press and a plate and frame filter press depending on the filter structure. Chamber filter press structure:
★ Common troubleshooting:
4, the filter:
A device that separates solids and liquids in a coal slurry by the pressure difference across the filter, collectively referred to as a filter. Depending on the orientation of the pressure difference, the filter can be divided into a filter press, a vacuum filter, a pressure filter, and the like. The pressure filter has the advantages of low moisture, high automation, high production capacity, low filtrate water concentration, etc., and is widely used in coal preparation plants. The structure is as follows:
★ Common troubleshooting:
Third, transportation equipment
1, belt conveyor
Its main components are reducer, drive unit, drive roller, reversing roller, idler, conveyor belt, tensioning device, unloading device, sweeper, chute, safety protection device and so on.
★ Common troubleshooting:
2, scraper conveyor
The scraper conveyors are divided according to the number and arrangement of the scraper chains, and there are medium single-chain, double-chain and medium double-chain scraper conveyors.
★ Common troubleshooting methods:
3, bucket elevator
The structure of the bucket elevator is as follows:
★ Common troubleshooting methods:
4, feeder
Common troubleshooting methods for feeders:
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