3000t/H Capacity Stockyard Stacker And Reclaimer For Coal Fired Power Plant

Product Description

800t/h capacity stockyard stacker and reclaimer for coal fired power plant

 

Circular gantry type scraper stacker and reclaimer is mainly used in building materials, coal, metallurgy, electric power, port and other industries, and is mostly used to stack limestone or coal and other bulk materials. The cantilever of the stacker is equipped with a belt conveyor, which passes through the steel structure grid roof of the circular stockyard from the belt conveyor on the trestle, and the input materials complete the ring conical stacking through the belt conveyor on the cantilever of the stacker; The reclaimer completes the reclaiming work via three linkinge processes: traveling system, luffing system and scraper system. The scraper reclaimer scrapes the materials into the conical hopper under the central column along the slope of the pile, and outputs the materials through the vibrating feeder and underground belt conveyor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Feature

product	Stacker and Reclaimer
painting	Jotun
color	red
capacity	800 t/h
character	heavy duty
advantage	robust design
benefit	low maintenance
material handling	coal or limestone

 

Main components of circular stacker and reclaimer

1. Stacking steel structure, cantilever belt conveyor

The cantilever stacker takes the central column as the center, one end is the belt conveyor with cantilever steel structure, and the other end is the counterweight box. The middle stacking slewing part is connected with the central column by slewing bearing, and the stacker can rotate by meshing the pinion on the slewing driver with the gear on the central column. The materials entering the circular stockyard are unloaded at the head of the cantilever belt conveyor and directly stacked to the stockyard. The stacker rotates at a certain angle for slope stacking until it is stacked into an annular pile.

There are two main structural types of cantilever stacker, cantilever fixed type and cantilever luffing type.

Comparison of the two types of stacker :

(1)The advantages of the fixed stacker are simple structure and low cost. The disadvantage is that when the lower part of the stacker is not stacked or the material pile is low, the difference is huge, and the dust in the stockyard is more serious (even with spray system).

(2)The luffing stacker using the hydraulic cylinder to raise or lower the cantilever . Its advantage is cantilever can raise up and down according to the stacking height to reduce the material drop and avoid dust flying. As well, it can reduce the height of the central column and reduce the cost. The disadvantage is that the structure is more complex.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.King column and slewing mechanism of circular stacker and reclaimer

(1) The king column of the stacker reclaimer is located in the center of the circular stockyard. It is an important component of the stacker reclaimer. It not only bears the load of the main components and the input trestle, but also is the installation center of the components. Therefore, its manufacturing and installation process requirements are very high. It is made of steel plate rolled into a cylindrical shape and welded and assembled. The utility model is provided with a stacking steel structure, a rolling bearing for the stacking rotary part and a cable drag connecting various equipment components
(2)The top of the king column is the stacking rotary part, the upper part of which is connected with the belt conveyor trestle entering the circular stockyard through the rotary bearing and serves as a support point for the trestle load, and the lower part is connected with the middle column through the rotary bearing.
(3)In order to enable the slewing bearing device to bear large vertical force, horizontal force and overturning moment, the slewing bearing support type is adopted. The rotary bearing is protected by a dust cover. Its structure can adapt to the harsh working environment and has the functions of dust prevention, water immersion prevention, refueling, cleaning and maintenance.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.Gantry stacker

The gantry scraper reclaimer is mainly composed of gantry, traveling mechanism, reclaiming luffing mechanism and scraper reclaimer. The gantry is the main component of the rotation, luffing and load support of the scraper reclaimer. The scraper reclaimer is set under the gantry. The luffing mechanism adopts mechanical winch type, and one end of the gantry is connected with the central column by roller bearing, The other end is supported on the circular track on the upper part of the stockyard retaining wall, and the rotation of the reclaimer is driven by the traveling wheel on the circular track. The gantry reclaimer has a robust structure, and most of the weight of the gantry is borne by the retaining wall, which significantly improves the stress state of the central column and makes the operation more reliable .
The traveling mechanism is composed of driving wheel group, traveling electrical detection and control system and lubrication system. Considering the requirements of two-way movement of the swing gantry under the most unfavorable conditions, two traveling wheels are used as the driving wheels. The wheel set is mechanically driven by variable frequency speed regulation. Stepless speed regulation of working travel speed and non working travel speed (in order to ensure the normal and safe operation of circular stacker reclaimer, set slow and fast speeds respectively according to the on-site operation conditions, i.e. working travel speed and non working travel speed). In order to ensure that the stress of the gantry is reasonable and the wheel pressure of each wheel group under the gantry is the same, the gantry is hinged with the two wheel groups, and each hinge point adopts through shaft type. In addition, the joint bearing is used at the connection between the gantry and the walking structure to ensure that the gantry can automatically adapt to the change of track. The lubrication of each supporting bearing and hinge shaft of the traveling mechanism adopts grease centralized lubrication.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.Reclaimer luffing mechanism:
The luffing mechanism is composed of driving device, drum assembly, double steel wire rope and pitching electrical detection and control system. The luffing operation of scraper reclaimer is completed through the pitching mechanism, so as to achieve the purpose of layered reclaiming.
The luffing mechanism using double steel wire rope single winding, and the balance mechanism is adopted at the intersection of the two steel wire ropes to ensure that the stress of the left and right steel wire ropes is balanced and the work is safer.
The driving device of the luffing mechanism is mechanically driven by frequency conversion and speed regulation to accurately control the amplitude variation, so as to control the change of the reclaiming amount. In order to ensure the safety and accurate and reliable positioning of the pitching mechanism, the driving device adopts double braking system