Construction Of A Pilot Motorized Mixer
A pilot motorized mixer refers to a specialized blending apparatus designed for small-scale testing and prototyping within the field of material processing. This innovative device amalgamates various components efficiently, showcasing its adaptability in diverse research and development applications. The pilot motorized mixer stands as a testament to the convergence of precision engineering and cutting-edge technology, embodying a versatile solution for laboratories and small-scale production environments. Its intricate design incorporates a robust motor system, enabling controlled agitation and thorough homogenization of substances. The integration of adjustable speed settings ensures optimal mixing performance, catering to the nuanced requirements of experimental processes. This equipment serves as a fundamental tool for scientists and engineers engaged in the exploration of material properties, emphasizing its pivotal role in facilitating meticulous experimentation and analysis, ultimately contributing to advancements in the realm of material science and innovation.
A motorized mixer of 200 liters capacity was constructed to have the capability of mixing 200 liters of fluid during operation.
The construction of the mixer involves the preliminary measures and calculations on the surface area of the metal sheet. Some basic workshop practices was carried out during the construction such as the marking out of the metal sheet, cutting of different sizes of the sheet, welding of the prints, assembling of the components parts and painting of the equipment.
The material used in the construction of the mixer is mainly of mid steel. The mild steel was used for the construction due to its quality cost availability and characteristics.
The cost of constructing the motorized mixer was cheep due to the choice of material selected for the constructional project and it was finally painted with aluminum paint to protect it form corrosion.
The material dimension used in construction of the motorized mixer is as follows:
Length of vessel 700mm
Diameter of vessel 600mm
Length of shaft 800mm
Surface area of plastic vessel 1320000mm
Electric motor rating 733.3v 50/60HZ, 3728.5 watt
7000r pm
Title page
Letter of transmittal
Acknowledgement
Dedication
Abstract
Table of content
1.0 CHAPTER ONE –
INTRODUCTION
1.1 Problems encountered during mixing
1.2 Purpose of mixing
2.0 CHAPTER TWO
– LITERATURE REVIEW
Theory of mixing
Types of mixers
Classes of impellers
Types of impellers
Other types of mixers
Criteria of mixer effectiveness
Application of mixers
Functions of impellers
Mechanism of a pilot motorized mixer
Degree of mixing
Mixing rates
Selection of material
Steel for construction
Types of steel-in construction
Important properties of steel in construction
Protection of steel
CHAPTER THREE
Sequence of operation
Analysis of cost
Operation of the motorized mixer
CHAPTER FOUR
Conclusion/Recommendation
Nomenclature
References
MOTORIZED MIXER OF 200-LITER CAPACITY
INTRODUCTION
Mixers are equipments used to prepare a uniform combination of two or more substances. Its aim is to obtain a desired degree of mixing in which the product in the mixer may be homogenous or heterogeneous. The mixing or blending of liquid substances depends on the creation of flow current which transports unmixed materials to the mixing zone adjacent to the impellers.
The motorized mixer consists of different parts which makes up its body, they are:
a. The shaft
b. The impellers, which are usually in the form of flat blade turbine type, either centrally located in the vessel or nearer to the bottom entry of the required material. They are also in axial flow or radial flow depending on the angle which the blade makes with the plane of the impeller rotation.
c. A vessel or tank, in which the degree of uniformity or homogeneity operation is carried out; depending on the material involved such as solid and liquid or required and gas.
d. It also has a motor, which is of about 5 horse power, that helps in rotation of the shaft; connected with a belt.
Mixting is an important unit operation where one substance is made to completely intermingled with another; like in saponification where a caustic soda is mixed with groundnut oil or palm kernel oil in order to have a homogenous mixture in soap production.
The mixing process depends on the effective agitation used during the operation.
Agitation refers to the induced motion of a material in a specified way, usually in a circulatory patter, inside a vessel or container, and mixing is the random distribution into and through one another of two or more initially separated phases.
A single homogenous material, such as a thankful of cold water can be agitation but it can not be mixed until some other materials such as quantity of hot water or some powdered solid is added to it.
The selection of a particular mixer for a particular purpose depends on some factors such as the process requirements; flow properties of the process fluid; equipment cost and the construction materials required.
A good mixer is therefore is one, which produces a well uniformed product at lowest overall cost; and meets all process requirements.
PROBLEMS ENCOUNTERED DURING MIXING
There are problems that are mainly encounter in mainly process, the commonest one is the overtaking or mass swirling of the liquid.
Vortexing do occur in the mixing processing and it causes reduction in difference between the fluid velocity and the impeller velocity and thereby decreases the effectiveness of the mixing process. (Vortex occurs when there is gas-liquid surfaces or phases).
If the mixing vessel or container is small in size, vortexing can be prevented by installing the impeller of centre or at angle with the vertical or fixing the impeller to the side of the vessel at an angel.
These problems can be prevented by chosen an appropriate mixer and taking all the precautions in mixing to avoid vortexing.
Note: vortex occurs when there is gas – liquid surfaces in mixing and is prevented by baffle.
PURPOSE OF MIXING
Substances or materials are mixed for a number of purposes depending on the objectives of the processing step, they includes:
a. Suspending solid particles
b. Blending miscible liquids
c. Promoting heat transfer between the liquids and a heat exchanger (e.g. coil or jacket)
d. Dispensing a gas through the liquid in the form of small bubbles.
e. Reducing partial agglomerate
f. Contracting or dispersing immiscible liquids.
Mixers generally have a number of characteristics in common; they full under the range of
a. Change-can mixers
Kneaders
Dispersers
Masticators
SHARE PROJECT MATERIALS ON:
A Pilot Motorized Mixer:
A pilot motorized mixer is a piece of laboratory equipment used for mixing or agitating liquids or substances in small to medium-sized containers. It is designed to provide precise and controlled mixing for various scientific and research applications. Here are some key features and components typically associated with a pilot motorized mixer:
Motorized Stirring Mechanism: The core component of a pilot motorized mixer is an electric motor that drives a stirring element. This stirring element can take various forms, such as a magnetic stir bar or a paddle, depending on the specific mixing requirements.
Speed Control: Most pilot motorized mixers offer adjustable speed settings to control the rotation or agitation of the stirring element. This allows researchers to optimize mixing conditions for their experiments.
Digital Display: Many modern motorized mixers come equipped with a digital display that shows the current speed and, in some cases, a timer for precise control over mixing parameters.
Safety Features: Pilot motorized mixers often include safety features like overload protection to prevent damage to the motor or the mixing mechanism.
Stability and Mounting: These mixers are designed to be stable and are often equipped with clamps or mounts to secure them to a lab bench or platform. This ensures that the mixer remains in place during operation.
Heating and Cooling Options: Some advanced models may also offer heating or cooling capabilities, allowing researchers to perform temperature-controlled mixing.
Compatibility: Pilot motorized mixers are compatible with various types of containers, including beakers, flasks, and test tubes, thanks to the use of different types of stirring elements and adapters.
Application Versatility: These mixers find applications in various fields of science and research, including chemistry, biology, pharmaceuticals, and materials science. They are used for tasks such as dissolving solutes, maintaining homogeneity, and conducting reactions that require constant mixing.
Overall, a pilot motorized mixer is an essential tool in many laboratory settings, providing researchers with a reliable and controlled means of mixing liquids and substances for a wide range of experiments and processes.