Application of Sidewall Belt Conveyor in Thermal Power Plant

1.Requirements
Sidewall belt conveyor is the major equipment to convey coal and lime-ash in thermal power plant. Therefore it has high requirements for the security of equipment. Generally speaking, the whole transit line is equipped with twin channel sidewall belt conveyor, one is put into use, another is as standby application device. Thus, this coal handling system must be equipped with sidewall belt conveyor with 2500m-3000m length. Applying sidewall belt conveyor to thermal powder plant, it can not only simplify procedure, but also save cost.
2.Features
Due to power plant has high requirements for the security of equipment, technical requirements of sidewall belt conveyor are as follows:
1) It has different requirements for belt conveyor when it used to receive, convey or discharge materials. For instance, if the belt conveyor is used to receive materials, the belt speed of it shouldn’t be too high. If it is used to convey materials, it requires that trough angle of idler decrease properly. If plow discharger is put into use, the cover rubber of belt surface should be thicken properly.
2)The belt speed should be low. Belt conveyor is mostly arranged in workshop, so it has high requirements for coal dust control. According to domestic and foreign practical experience, it’s better to adopt lower speed.
3)After installation of this machine, it seldom changes its layout.
4)Different coal type has different requirements for belt conveyor. For example, large coal particle size needs impact idler with high quality. Coal with less water and more dust needs guide chute with good sealing. 

Type and Function of Fixed Belt Conveyor Roller

Roller is used to support the conveyor belt and carry of the material, to ensure the stability of the conveyor belt.
In general, the fixed belt conveyor roller is the following:
1.Trough roller: it is also known as carrying roller which is used for carrying bulk material;
2.Parallel roller: parallel upper roller is used for carrying materials, parallel lower roller is to support the return branch of the conveyor belt;
3.Self-aligning roller: it includes taper aligning supporting roller and friction aligning roller which are mainly used for adjusting the belt deviation to avoid S-shaped, so as to ensure the stable operation of conveyor belt;
4.Impact roller: it is installed in the lower part of the conveyor belt, which can reduce the impact of the conveyor belt to extend the service life of the conveyor belt;
5.Return roller: it supports the conveyor belt of lower branch,including parallel type, V type, inverse V type,etc. V and inverse V type roller can reduce the conveying belt deviation possibilities;
6.Transition roller: it is installed between the drum and the first set of roller, which makes the conveying belt gradually turns from through shape into or flat shape and reduce additional stress of the conveying band edge turns to trough shape due to the expansion, at the same time,it can prevent the material spreading phenomenon of conveyor belt.
In addition, the comb type roller and screw roller, which can remove the sticky material on conveyor belt to keep the conveyor belt clean. 

Coal Mine Belt Conveyor:Installation Safety Technical Measures and Matters

1. Please pave the conveyor belt in strict accordance with the belt central line that production department gives. Belt should be paved to make sure flat, straight, and below rollers complete and effective, sweeper should be conformed to the requirements, lining plate of head and tail frame, as well as the guardrail should be complete and reliable.
2. Belt conveyor parts should be transported according to the order of tail frame, middle frame and the head frame, after transporting to the designated location, please put them away as per the transportation order along the roadway.
3. Belt conveyor should be installed according to the order of head frame, middle frame, the tail frame, central line of each pulley belt conveyor should be in a straight line.
4. Belt conveyor parts should meet the requirements, the anchor bolt should be fixed and tighten reliably.
5.All sorts of protection device of belt (Anti-frog protection, speed protection, temperature protection, automatic water spray protection if overheat, deflection protection) after the installation is complete, please test each protection device to make sure they are and sensitive working in good condition. 
6. Please set up a bridge for walking where people go cross the belt conveyor frequently. 
7.The electric switch protection device must be completed which should be sensitive and reliable ,the protection setting values must conform to the requirements, and keep them from water and rain, there should be enough space for walking and repairing, cable should be placed neatly and in order, communication signal should be in good condition, light and sound should be clear and reliable, control signal device should be complete, sensitive and reliable, explosion-proof lighting lamps and lanterns should be installed.
8. Both the head and tail section of belt conveyor must be equipped with two fire extinguishers and fire sand box which is not less than 0.2 m3.
9. Sweeper installation must meet the production needs. Sweeper and conveyor belt surface must contact well to ensure appropriate tightness and uniform contact, please also make sure both the head and tail section must be equipped with a sweeper.
10. In the section that the roadway changes to slope where belt waves easily, to ensure the belt frame transition smoothly, you can by adjust the supporting leg of conveyor.
11.After completing all the installation ,ensure all rollers and the belt are connected in good condition, then you can commissioning the conveyor.

PK Machinery has been exporting belt conveyor, bucket elevator, scraper conveyor, screw conveyor, vibrating screen and other spare parts for many years. We do believe business between our customers and us can develop fast. Any enquiry, please contact us!

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Failure Analysis of Belt Conveyor Components

In the process of operation, failure of belt conveyor is inevitable, here PK Machinery will analyze the cause of belt conveyor failure.
1.Belt doesn’t rotate 
After start-up of the belt conveyor motor, the belt of drive pulley idles and slips, belt can’t rotate, this failure is caused by insufficient belt tension, improper adjustment of tension device, overlong length, overloading start-up, coal piled in the tail part of belt conveyor.
2. Belt is easy to break 
It is due to the large belt tension loose joint, poor quality of belt buckle, belt using for a long time, poor maintenance of belt, the solution is to tighten tension device, lower the tension ,change the new belt in time and strengthen the maintenance quality.
3. Reducer occurs abnormal sound.
The reason is due to the larger gap caused by serious wear of bearing and gear or screw is too loose, the solution is to replace the bearing, adjust the gap and repair or replace the whole reducer.
4.Reducer heats up too fast.
The reason is because of too much oil, poor heat dissipation performance, speed reducer is buried in coal pile, the solution is to adjust oil amount and remove the coal.

5.Reducer oil leakage.
The reason is due to the damage of sealing ring, the connecting surface of reducer is not uneven, the bolt is too loose, the solution is to replace the sealing ring, tighten the connecting surface and the bearing cap bolts.

 

6.Roller doesn’t rotate.
It is because of the damage of roller bearing, when coal powder enters into the roller sealing ring on both sides, it will be blocked and not rotate which makes the roller bend due to the large stress. The solution is replacement roller, reduce the height of discharging point and the landing point, or use the shock-proof roller at the landing point.

belt conveyor for raw material in cement plant

Fixed/ stationary/ long distance/ overland/ heavy duty belt conveyor is continuous material handling equipment for loading and unloading material horizontally or aslant such as bulk material, lump material, and package goods.
Fixed conveyor belt consists of transmission device, frame, conveyor belt, pulleys, rollers, tensioning device, sweepers, hopper, gathering sill, etc.
Stationary conveyor belt is widely used in mining, metallurgy, coal, power plant, port, etc.

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