HHH air slide pad (Aeration Pad)

HHH air slide pad (Aeration Pad) mainly used for the aeration of bulk powder and granular in silos and silo wagons. We offer a comprehensive range of Poly Airslide for use in air gravity conveyors. Air gravityconveyors are used to move dry particle material in variety of industries such as cement,detergent, transportation (bulk haulers, barges). This Air permeable fabrics is used for pneumatic conveyors of bulk materials.It is an indispensable part of cement plant, chemical industry, metallurgical industry,dense phase systems, air/fluid slides bulk cement tank trucks, ship and fixed cement tanks Mainly used for the aeration of bulk powder and granular in silos and silo wagons.An international packing to withstand rough handling in transportation.

Airslide pad for Ship unloader

The cement is supplied to the terminal in bulk carriers.For the unloading of these ships, the customer selected one of the standard shipunloaders, the model G-3/34D, (Figure 1). This unloader is a diesel driven pneumatic, shipunloader and is suitable for ships up to 25 000 dwt, having a nominal capacity of 315 tph over a maximum, conveying length of 340 m., The unloader operates from a newly built jetty. The, unit is mounted on a gantry with bogie sets that travel, over the rails of the jetty. These bogie sets are powered, by the electrical system of the unloader., After the unloader has been placed into the desired, unloading position, the cement outlet of the unit can be, connected to one of the multiple, connection points of the conveying, pipeline on the jetty by means, of a flexible cement discharge, hose., The unloader is equipped with, a Kovako suction arm with rotary, nozzle. Like all of the company’s, suction arms, it has been designed, by Kovako and manufactured, especially for the pneumatic, unloading of ships, taking into, account the specific loads that act, on it during unloading operations., The performance of the discharge system of the, unloader is sufficient to operate at the nominal capacity, of 315 tph on all dropping points in the flat storage building;, no booster compressor is required for the conveying., The discharge pipeline has been made according to, the sizing and layout specifications that were provided, by the client to the company. Kovako also supplied the, load data for the design of the pipeline supports along, the full length of the discharge line, up to the dropping, points in the flat storage. This data is very important,, especially with regard to the dynamic loads on the, pipeline during conveying. These dynamic loads, which, are typically much higher than the static ones, are often, neglected when the pipeline supports are designed.

Airslide pad for Flat storage building

The cement that is unloaded by the shipunloader is conveyed,, through the discharge pipeline, to a flat storage, building (see Figure 2). The storage building has a total, storage capacity of approximately 37 500 t, and is divided, into two separate storage sections., The cement is distributed over each storage area by, eight dropping points (per section). The flow of cement, to the dropping points is controlled by means of pneumatically, actuated butterfly valves. These valves are, mounted in the discharge pipeline that runs along the, length of the storage building., The flow of cement to the dropping points is, controlled by a PLC control system; level switches are, installed in the storage area to, detect maximum cement levels in, the storage. The system automatically, switches over to the next, selected dropping point if the, maximum cement level of the, active dropping point has been, reached. The operator can select, the dropping point sequence on a, control screen., To retrieve the air that is blown, into the storage by the shipunloader,, filters with integrated fans , are installed in the walls of the storage buildings. These, filters are also used to reduce the airborne dust inside, the storage area during reclaim operations.

Airslide Pad for Reclaim hoppers

The cement is in this case reclaimed from the storage, area by front-end loaders. For reclaiming, an aerated, reclaim hopper is installed in each storage area. The, front-end loaders load the reclaimed cement into the, reclaim hoppers, each hopper having a buffer capacity, of approximately 350 t., During the unloading of a ship it is not possible to, work in the storage area with the front-end loader. To, enable loading of the hoppers during this stage, each, hopper is provided with a dedicated dropping point., The hoppers are also fitted with level switches for control, of the cement level in the hoppers., Depending on the selections of the operator, the, hoppers can be filled automatically when the level in, the hoppers is too low., The cement is discharged from the hoppers by, means of a fluidised bottom. The bottom of the hoppers, is covered with aeration panels at a slight incline. The, aeration panels are used to fluidise the cement so that, it flows to the outlet, at the lowest point of the hopper, Thanks to the aerated bottom, a high buffer, capacity is achieved at minimal height. The hoppers are, located above ground level., The company delivered all the main parts for the, hoppers (aeration boxes, aeration fabric, aeration blowers,, flow control valves, etc.), as well as the engineering package for the installation of the delivered parts., Control system, The operation of the flat storage is controlled by a PLC, control system. This system controls the operation of the, filters, the valves in the conveying pipeline, the aeration, blowers and the air distribution valves of the hoppers., The terminal control system also communicates with, the shipunloader and, thanks to this communication,, switching to another dropping point can be activated at, the most convenient time, thereby minimising capacity, losses (by interrupting the unloading operation) and, dynamic loads on the equipment., The communication is also used to interrupt the, discharging to the storage if necessary. This could be, the case if all selected dropping points have been, filled to the maximum level, or if there are problems, (such as inoperative filters or incorrect valve positions)., The control system of the flat storage is fitted with, two control screens, both with full functionality. One is, located in the terminal control room, from where the bagging plant is also controlled. For maintenance purposes,, the other screen is located in the machinery room, of the terminal where the aeration blowers, control air, compressors and MCC are located.

Airslide Pad for Bagging plant

The cement from the aerated reclaim hoppers is transported, to the bagging plant, directly next to the storage, building., Ventomatic, also an FLSmidth company, delivered the, bagging plant equipment. This is equipped with two, rotary packers, each with a capacity of 2500 to 2700, bags/hr for bags of 50 kg (and 2800 to 3200 bags/hr for, 25 kg bags)., There are five truckloading lanes in total; four for the, loading of bags to trucks and one for the loading of bulk, trucks., The control systems of both the bagging plant and, the flat storage are coupled so that cement from the, reclaim hoppers can be supplied to the bagging plant, automatically if required., Weighbridges, The trucks that are loaded at the bagging plant are, weighed before and after loading. Kovako has provided, two steel weighbridges, each for loads of up to, 60 t, and a PC based weighing control system., Diesel generators, The complete terminal is independent from the local, power supply due to three diesel driven generator sets., Included in the delivery was the power distribution board, that controls the operation of the sets and the distribution, of the electrical power to all users on the terminal., The power of two generator sets is sufficient for the, complete terminal at maximum power. The third set is, used as backup in case one of the sets is down for maintenance, or due to a breakdown. All the aforementioned, equipment was delivered by Kovako as a complete, delivery.