一.Double electrode anachronistically technology for coal slurry dewatering screens
Coal sludge dewatering screen is mainly composed of screen box, exciter, support system and motor. When working, through the tape coupling respectively drive two mutually unconnected vibrators for synchronous reverse operation, the use of double electrode self-synchronous technology produced by the excitation vibration, so that the screen box for reciprocating linear motion.
The double-electrode self-synchronous technology adopted by the coal sludge dewatering screen, through the universal eccentric block, adjustable amplitude vibrator and two vibration motors for synchronous reverse operation. The centrifugal force generated by the two sets of eccentric masses is superimposed along the vibration direction, and the reverse centrifugal force is can celled out, so as to form a single excitation vibration along the vibration direction, and make the screen box do reciprocating linear motion. This technology helps coal slurry dewatering, which is mainly reflected in the following aspects: firstly, it can ensure the stable trajectory of the screen box, improve the screening efficiency, and make the coal slurry vibrate sufficiently on the screen mesh, so as to achieve high efficiency dewatering; secondly, the design of adjustable amplitude can be adjusted according to the characteristics of different coal slurry and the dewatering requirements, with strong adaptability; furthermore, the double-electrode self-synchronous technology makes the equipment run more smoothly, reduces the vibration and noise, and prolongs the equipment. vibration and noise, prolonging the service life of the equipment.
二.The principle advantage of coal sludge dewatering screen
1.Low noise and convenient maintenance. The noise generated during the operation of the equipment is low, and will not cause excessive interference to the surrounding environment, and at the same time in the event of failure, maintenance is also more convenient.
2.Reasonable structure, durable. Its overall structure is scientifically designed, and all parts are closely matched to withstand large workloads and ensure the long-term stable operation of the equipment.
3.Good dewatering effect, safe and reliable. Through reasonable vibration frequency and amplitude settings, as well as special screen design, it can effectively separate the water in the coal slurry and improve the quality and value of coal slurry.
4.It is large screening processing capacity and high screening efficiency. It can quickly process a large amount of coal slurry and improve production efficiency.
5.It is light weight, easy to dismantle and install, easy to maintain, no sudden spring break. This makes the equipment more convenient in the process of installation, disassembly and maintenance, and reduces the maintenance cost. In addition, the coal sludge dewatering screen has some other advantages, such as different materials can be used according to the different requirements of the user, to meet different production needs; the price is relatively low, it is an alternative to the traditional dewatering equipment, cost-effective; professionally designed high frequency, low amplitude, low energy consumption of power source, more energy efficient and environmentally friendly and so on.
三.How to maintain the coal sludge dewatering screen in daily life to prolong the service life?
Before running to check to ensure that the ordered type and specifications are consistent, to avoid contamination and bruising phenomenon in operation; the assembled power supply should also be consistent with the logo; for all fastening parts should be tightened, the grounding wire should also be installed firmly. When the vibration dewatering screen does not need to be used again, the power supply should be cut off; in the cleaning to avoid water to wash the motor, so as to avoid the phenomenon of leakage; always keep the screen mesh clean, so as to ensure that the use of the use can have good results.
In addition, the maintenance of bearings is the key. Bearings in the dehydration process can not avoid wetting, time will rust or corrosion, so you can clean the bearings, cleaning after the bearings should also be coated with a layer of anti rust oil or anti rust grease. At the same time, pay attention to the purchase of vibration motor, dewatering sieve in the work, due to the amplitude, some water will splash to the vibration motor, so choose a new type of vibration motor to solve this problem. Every once in a while, we should check whether the parts are intact, and do a good job of maintenance and repair of parts.
Motor, vibration motor operation process, must pay attention to bearing lubrication. Under normal operating conditions, the cumulative operation of about 1600 hours, should replace the bearing grease and clean the bearings, bearing chamber, bearing gland. After the motor is out of use or stored for more than half a year, it should be disassembled for maintenance and grease replacement. After the accumulated running time of the motor exceeds 5000 hours, the bearings should be inspected and replaced with new ones if they are damaged. After the motor has been parked for half a year or a longer period of time, the insulation resistance of the stat or coil to ground should be measured before use, and the insulation resistance should be not less than 20 MEGOs when measured with a 500V meg ohmmeter.
As for the screen mesh, it should be kept clean at all times to avoid staining and bruising during operation. When cleaning the screen, pay attention to the method to avoid damaging the screen. At the same time, we should regularly check the wear and tear of the screen mesh, and if it is damaged, it should be replaced in time.
四.How to solve the problems of incomplete dewatering and not discharging?
Firstly, check whether the screen mesh is clogged or badly worn. If so, clean or replace the screen surface in time, and at the same time tighten the drive belt and screen.
Tighten the bolts to ensure that the parts of the equipment are firmly connected. Add lubricant to the vibration motor to ensure its normal operation. If the support spring is found to be stiff or damaged, the dewatering screen spring should be adjusted or replaced in time.
Ensure that the screen box of the dewatering vibrating screen maintains the same horizontal level as the horizontal plane when it is installed, so that the material can flow in a straight line, avoiding that the material can’t flow normally due to the offset of the screen surface.
Control the feed rate uniformity, according to the equipment model corresponding to the processing capacity of the feed, to avoid too fast feed rate caused by screen mesh blockage.
For a large number of finer grades of finer materials, you can increase the auxiliary screening method. Auxiliary screens with larger mesh size screens are used to pre-teen the product grades on the screen. When used for screening, dewatering and DE-meshing of finer materials, the machine length of the screening machine is generally taken to be 5.6 – 7 m, with a length ratio of about 3.
Coal sludge dewatering screen appear deteriorating is not complete, no discharge and other problems are mainly due to machine reasons and material reasons.
Machine reasons:
Dewatering screen mesh is not tightened, and the transmission belt is too loose, which will lead to incomplete dewatering. The screen mesh and belt should be tightened in time to ensure the normal operation of the equipment.
Loose bolts will affect the stability of the equipment, and the bolts should be checked and tightened regularly.
Lack of lubrication of the vibration motor will affect the operating efficiency and life of the equipment. Lubricant should be added to the vibration motor on a regular basis.
Large stiffness or damage to the support spring will cause the material to be subjected to a large excitation force, resulting in violent vibration and affecting the dewatering effect. The support spring should be adjusted or replaced.
Material reasons:
The feeding speed is too fast and the feeding is not even, which will cause the material layer on the screen surface to be too thick, resulting in clogging of the screen mesh and incomplete dewatering. The feed rate should be controlled evenly, to avoid giving too much or too little material.
The material contains a large amount of mud, which will increase the difficulty of dewatering. You can consider adding auxiliary screening methods, or ore-treatment of materials to reduce the mud content.
Materials with particle size less than 3/4 of the mesh size are easy to steal through the sieve, particles larger than 3/4 of the sieve hole are difficult to pass through the sieve hole, and particles with a particle size of 1 – 1.5 times the mesh size are called granules. According to the particle size of the material should choose the appropriate screen, improve screening efficiency.
五.Coal sludge dewatering screen in mining, coal, construction and other industries
In the mining industry, dewatering screens are often used for the dewatering of failings and concentrates. After the completion of mineral processing, the failings treatment process needs dewatering screen to assist in removing the excess water, so as to facilitate the stacking or reuse of failings; before the concentrate is further processed, it also needs to be deterred through the dewatering screen, so as to improve its quality and the efficiency of subsequent processing.
In the coal industry, coal slurry dewatering screen is mainly used for the dewatering treatment of coal slurry. Coal slurry is a by-product of coal washing process, which contains a large amount of water, and the use of dewatering screen for processing can remove the water in the coal slurry, so that it can meet the requirements of subsequent processing.
In the construction industry, the dewatering screen is widely used in the dewatering treatment of washed sand in sand and gravel plants as well as in construction high-frequency vibrating screens and granular material screening machines. Washed sand needs to remove the surface soil and impurities during the production process, and the material processing by dewatering screen can ensure that the quality of the sand meets the construction requirements, and provide high quality construction materials for the construction project.
