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Conveying System of Grain Silo

Introduction of Conveying System :
The conveying system is an indispensable part of the steel silo storage and transportation system. It can convey powdery and granular materials to designated locations along different conveying directions (horizontal, vertical or inclined directions) as required. The conveying system has a simple structure and is easy to operate;

Introduction of Conveying System

 As a steel silo engineering system and EPC general contractor in the field of bulk material storage and transportation, SRON not only provides clients with steel silo design and construction services, but also provides clients with the conveying systems and auxiliary equipment required for supporting steel silos.

The conveying system is an indispensable part of the steel silo storage and transportation system. It can convey powdery and granular materials to designated locations along different conveying directions (horizontal, vertical or inclined directions) as required. The conveying system has a simple structure and is easy to operate; it can be conveyed horizontally, vertically or in an inclined direction. During the transportation process, physical operations such as heating, cooling, drying, and air flow classification of materials or some chemical operations can also be performed simultaneously. Conveying equipment includes elevators, belt conveyors, pipe belt conveyors, scraper conveyors, pneumatic conveying systems, etc. If you are interested in the conveying systems and equipment supporting the steel silo or want to know more details, please contact us.


1 Bucket Elevator
Bucket elevator is a conveying equipment that lifts materials from low ground to high place. It is suitable for vertical lifting of solid block materials and small particle materials such as limestone, coal, gypsum, clinker, dry clay, as well as cement, coal powder, etc. After the material enters the hopper through the vibrating table, the bucket elevator automatically moves upward continuously. Its conveying speed can be adjusted according to the conveying capacity, and the lifting height can be selected according to needs. SRON bucket elevators are divided into NE Series Bucket Elevators and TGD Series Bucket Elevators according to different traction methods.


NE Series Bucket Elevators
1.Big Lifting Capacity: take flow-through feeding type, strategy induction discharge type, and big lifting capacity range of 15-800 m3 / h.
2.Small Drive Power: no back and dig phenomenon when lifting the material, therefore less reactive power.
3.Wide Lifting Range: can lifting powder, granular, lump materials, and material and temperature ≤250 ℃。
4.High Lifting Height: low chain speed, stable operation and adopts the plate chain high strength wear resistant chain, so lifting height can up to 40m.
5.Long Service Life: the service life of the conveyor chain is more than five years.
6.Good Reliability: advanced design principle ensure the reliability of the running of machine. Time between failures is more than 30000 hours.

TGD Series Bucket Elevators
1.High Lifting Height: highest height of single machine can up to 100 m.
2.Big Capacity: the biggest capacity can up to 950 m3 / H.
3.Materials temperature requirement: up to 120°.
4.The bucket allocation are intensive, continuous materials receipt and and continuous materials discharge.
5.Long Service Life: good reliability, trouble-free time is more than 60,000 hours.
6.Low Power Consumption: save energy consumption by more than 30% compared with chain elevator for its low machine weight.
7.Low Maintenance Cost: with convenient operating and maintenance and less wearing parts, the maintenance cost is reduced by around 80% compared with normal elevator.
8.With high accuracy design, high strength structure and beautiful appearance.
In addition to vertical conveying, we also provide horizontal and inclined conveying. The following conveying equipment will be used for conveying in these two directions.

2 Belt Conveyor
Belt conveyors can be divided into belt conveyors and pipe belt conveyors according to different transportation methods and material characteristics.

Belt Conveyor
DT Ⅱ type fixed belt conveyor can be designed and calculated according to different terrain and working conditions according to the requirements of conveying process, and combined into a whole conveyor. It can be used to transport various bulk materials and finished goods with loose density of 500-2500kg /m³.
The working environment temperature of belt conveyor is generally - 25 ~ 40 ℃. For belt conveyor working in special environment, if it has the requirement for working conditions of heat resistance, cold resistance, waterproof, anti-corrosion, flame retardant, etc., corresponding protective measures should be designed separately.

1.Wide range of conveying materials
2.Large conveying capacity
3.Strong adaptability of the conveying line
4.Flexible loading and unloading
5.Long service life & continuous working time
6.High security performance
7.Low maintenance cost

Tubular Belt Conveyor
The tubular belt conveyor is a special type of belt conveyor developed on the basis of the grooved belt conveyor. It uses several (usually six) rollers to force the conveyor belt to form a tubular, and convey various of loose materials such as powder, granule or block. The tubular belt conveyor is suitable for conveying bulk materials with density less than 2500kg/m3. The applicable working environment temperature is -25~40 ℃; It can meet the requirements of heat resistance, cold resistance, water proof, anti-corrosion, anti-explosion, flame retardant and other conditions.


1.Sealed conveying of materials can reduce environmental pollution;
2.It can realize turning operation with small curvature radius;
3.The reciprocating operation of the belt can be used to realize two-way conveying;
4.If the tubular belt conveyor is selected, the trestle is not necessary, which saves the trestle cost;
5.Save space, save civil engineering and equipment investment, reduce the fault point and cost of equipment maintenance and operation.

3 Scraper Conveyor
TGSS series scraper conveyor is a conveying equipment that continuously transports bulk materials with the help of a moving scraper chain in a closed rectangular cross-section shell. It is mainly used to transport powdery, granular and small block materials. It is widely used in the horizontal transportation of materials and small particles in feed, chemical industry, grain depots, ports and terminals, grease and other industries.


1. High-strength chain, chain plate and pin scraper fixed piece are all specially heat-treated, with high strength and good wear resistance;
2. The scraper is made of ultra-polymer wear-resistant material, which effectively reduces operating noise and extends the service life of the equipment.
3. Detachable structural design, the cover plate, side plates and bottom plate are all detachable, making it easy to inspect, maintain and replace;
4. The transmission bracket is processed as a whole and equipped with double fine-tuning screw holes.

4 Air Cushion Conveyor
Air-cushion belt conveyors are widely used in various industries such as metallurgy, electric power, coal, chemical industry, grain, light industry, ports and terminals, cement and building materials, etc. due to their light structure, large conveying capacity, and low load-bearing capacity on the silo roof.

(1) Smooth operation, reliable operation, large conveying capacity, no material spillage, and no deviation when feeding.
(2) The running resistance is small, the conveyor belt tension is small, and the driving power consumption is reduced by about 10% to 20%.
(3) A large conveying inclination is required.
(4) Low equipment investment and low maintenance costs.
(5) Convenient for sealed transportation to avoid dust flying.

5 Full Sealing Belt Conveyor
Fully sealing belt conveyors are used to transport materials in silo projects with high environmental requirements. It adopts a patented single-roller structure to achieve full sealing of the whole equipment. It can be widely used in metallurgy, mining, coal, ports, power stations, building materials, chemical industry, light industry, machinery, petroleum and other industries.

1.Full sealing structure, environment friendly
2.Special residual sweeping device to avoid tail residual
3.Innovated for belt-back, reduce friction and power consumption
4.Single roller structure, drive device is external, easy for maintenance
5.Equip safety operation device, such as:urgent stop, speed monitor, anti-blocking, off tracking etc.

6 Pneumatic Conveying System
Pneumatic conveying system is a kind of environmental protection and efficient conveying method, which uses air flow as the bearing medium to transport pellet or powder materials under certain conditions. Pneumatic conveying system is mainly used for medium and short distance conveying of powder materials, and the density of materials is not more than 2.0. The system is mainly composed of feeding equipment, conveying pipeline, material gas separation equipment, gas source and purification equipment. Pneumatic conveying devices are divided into three categories: Positive-pressure Dense-phase Pneumatic Conveying, Positive-pressure Dilute-phase Pneumatic Conveying and Negative-pressure Suction Pneumatic Conveying.


Positive-pressure Dense-phase Pneumatic Conveying System
Pneumatic conveying system adopts positive-pressure dense-phase pneumatic conveying technology so that its conveying distance is 50-1000 m, the lifting height is up to 75 m, and conveying capacity is up to 150 t / h. Positive-pressure dense-phase pneumatic conveying system has obvious advantages:
High mixing ratio: 30 ~ 60kg (ash) /kg (gas)
Low flow rate: average flow rate is 8 ~ 12m/s;
Less wear: the service life of the system can reach 20 years
Long conveying distance, large conveying capacity, small land occupation, clean and pollution-free operation

Positive-pressure Dilute-phase Pneumatic Conveying System
The positive-pressure dilute-phase pneumatic conveying system uses gas pressure lower than 1kg/c and adopts positive pressure (pressure feeding type) to push materials through the entire conveying line at a high speed. The characteristics of positive-pressure dilute-phase conveying: it can convey materials from one low point to multiple points; the conveying capacity is large, and it is suitable for short or medium distance conveying. Suitable for transportation of lime powder, fly ash, cement, alumina, ceramic powder, rare earth materials, etc.

Negative-pressure Suction Pneumatic Conveying System
The negative-pressure suction pneumatic conveying system relies on the air flow with a pressure lower than the external atmospheric pressure to convey materials along the streamline in the pipe.
In engineering design, the negative-pressure pneumatic conveying has the following characteristics:
1.It is applicable for centralized transportation of materials from multi-point to one point. The dispersed materials are attracted and transported from various points in sequence, and the pressure and suction speed can also be balanced when the points are simultaneously attracted;
2.It is suitable for conveying material which has a wide accumulation surface or is located in a low or deep position to the high position. Such as the loading and unloading of materials stored in a silo, suction and transportation of bulk powdery or granular materials in truck or ship;
3.The feeding point can be open, and will not cause dust flying; 
4.Oil or water in the fan will not mix with materials, so it is suitable for conveying food and other materials that need to be cleaned and transported.

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