SINSUNG

Types and Definition of Storage Tank

1) Hopper : installed for storage and for purpose of making uniform the speed and direction of the flow (used as buffer function)
2) Bin : installed for control of quantity change during processes and to store for a comparatively short time (hour or day) and has the function of hopper too
3) Silo : big container with main purpose of storing for a long time (week or month)

General Characteristics of the Storage Tank

1) By separately classifying 입분체, it must be efficiently collected and stored in that state
2) Transportation cost of raw material and product cost must be possible
3) It has the better storage ability compared to other warehouses and is not limited by the location
4) The equipment cost per storage amount is small
5) The insertion, emission and storage control can be done automatically
6) Simple pressurization, incubation and damp-proof work is possible
7) The change, decomposition, damage, insect damage, wind damage can be prevented
8) As part of the process of manufacturing production system, integration is easy and labor saving is possible

Thing to Consider when Designing

1) Storage amount
2) Required ingredients and standard construction level
3) Powder ikon (granularity, 진비 weight, specific weight of appearance, temperature, moisture absorption, deliquescence, cohesiveness, stickiness, degeneration properties, electrification, explosiveness, abrasion, crushing, non-acid, toxicity, corrosive, angle of repose, internal friction angle, liquidity etc.)
4) Types and weight of facilities needed
5) Weight (loaded weight, snow load)
6) Ground strength, bearing
7) Operation conditions of up-stream and down-stream
8) Feed and discharge conditions
9) Pressure conditions influencing the insides
10) Operation temperature
11) Entrance and exit degree
12) Accident type and disposal method just incase
13) Whether silo accessory is needed and its types

Silo Sizing

1) The Silo size must be decided to satisfy the storage purpose and must consider the appropriate relationship of height which minimizes construction costs
2) The relationship between Silo Dia. and height is applied as H=2.62*D and the height H refers to the height of the straight of the Silo.
3) Deciding the cone angle
Cone angle is decided by the angle of repose of the material and if angle of repose is ∝. Cone angle = 180-2∝*K and K is the factor decided by the material. It is decided within the scope of K=1.0-1.5 and even if the material is too sticky and has the worst conditions, it is good to apply the angle of repose as 50-60 (even if it becomes k=1.5 or more due to material, it is applied as k=1.5 max) and to apply additional supplementary device
4) The space of the upper part of Silo according to the operation conditions or feed conditions must be sufficiently considered.
5) If fed by the conveying, the Silo Dia. Must be considered according to the size of the bag filter or whether it is stuck by itself.

ACCESSORIES

- Air emitting devices such as Bag Filter(Vent Filter), Cyclone
- Explosion preventing devices such as Explosion Door/Pressure Blance Valve/N2 Gas/Spray System
- Measuring devices such as Loadcell Weighting & Level Switch/Transmitter
- Emission assisting devices that has used Vibrator/Fluidizer/Bin Activator
- Emitting devices such as Loading Spout, Rotary Valve, Packer

Configuration, Characteristics and Use of Silo

Silo의 형상, 특징, 용도에 대한 테이블
Configuration	Related Formula	Characteristics	Use
Hopper Type	S = D H = 2.62D H+S = 3.62D	1. Most general 2. Supported by leg	1. General Single Type 2. Gold Panel Storage Tank 3. Chemical Manufacturing Use
Skirt Type	S = D H = 2.62D H+S = 3.62D	1. Supported by long skirt	1. Crop Use, Chemical Manufacturing Use 2. Concrete Storage Tank
Flat Bottom Type	Flat Bottom Type H = D	1. Height and Dia. is the same	1. Large Capacity Storage Use of Powder such as Cement and Alumina

Silo Design

Explosion Prevention Device

Emitting (assistance) Device

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