1. Advanced Slurry Pot Apparatus
Title of the Invention
Advanced Slurry Pot Apparatus
Inventor
Mr. Bhupendra K. Gandhi
Professor,
Department of Mechanical and Industrial Engineering,
Indian Institute of Technology, Roorkee,
Roorkee, , Uttarakhand, India.

2. Technical Field of Invention
This invention provides for a slurry pot testing apparatus to understand and evaluate erosion behaviour of different materials and varying compositions of solid-liquid mixtures at high impact velocities in order to establish effect of various parameters by providing uniform suspension of solid particles in a slurry. Existing systems using pin mill configuration cannot operate in high impact velocity.
IPR Status:
Application Number: PCT/IB2018/051688
Priority Date: 18/08/2017
Patent Status: Pending
Key Advantages of Investing in Early Stage of Invention:
Investing in the initial stage of such an exceptional technology is an opportunity to get licensing rights at an extremely cost efficient price and at more favourable terms.
It provides flexibility for the modification as per requirements.
Involvement of investor's Research and Development expertise, would further enhance the quality of product.

3. The Problem
Material handling is one of the major industrial challenges.
Movement and transportation of materials, especially solids, semi – solids and solid – liquid slurry mixtures, is one of the ongoing issues that requires continuous innovation and technological upgradation.
In order to minimise the inherent risk of the potential innovation, the impact of such materials on its immediate surroundings must be observed, understood, analysed and carefully taken note of.
This further requires continuous improvisation in testing apparatus in order to achieve better, accurate, precise and reliable results for efficient decision making.
There is therefore a need of pot tester apparatus that evaluates erosion behaviour of different materials at high impact velocities of solid particles suspended in a solid-liquid mixture and ensures uniform distribution of the solid particles.
Further, there exists a need to establish effect of various parameters and understand erosion mechanism of components handling solid-liquid mixture.
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4. Conventional Technology
In a conventional pot tester, one or more specimens are attached to a vertical rotating shaft in a pin mill configuration that restricts the evaluation of erosion behaviour of different materials at moderate velocities, and cannot withstand high impact velocities due to turbulence and non-uniform distribution of solid particles at high impact velocities.
In the past, techniques like installing a propeller attached at bottom of a vertical rotating shaft to lift a mixture of solid particles upwards to enable suspension of the solid particles in the liquid medium so as to form a solid-liquid mixture.
This caused random motion of solid particles due to turbulence which results in a significant error in calculation of impact velocity. Moreover, at higher speed, random motion increases leading to attrition of solid particles. Hence, evaluation is possible at a low velocity range up to 9 m/s.
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5. Construction
The present invention relates to slurry pot testing apparatus that evaluates erosion behaviour of different materials at high impact velocities and ensures uniform distribution of the solid particles in the solid-liquid mixture.
It can be used for evaluating behaviour of one or more specimens, and includes a cylindrical pot containing mixture, a propeller, baffles, specimen coupled with a second shaft rotating in an opposite direction opposite to the first shaft, and fixing means to allow orientation of the one or more specimens at different angles.

6. In Depth Working
Figure illustrates top side view of proposed invention.
The slurry pot testing apparatus (200) includes a cylindrical pot (202), baffles (204) [flow director] perpendicular to bottom surface of the pot (202).
A first prime mover (206) coupled with a first shaft (210) which is further coupled to a propeller (212) installed at a specific height above the bottom.
A second prime mover (214) coupled with a second shaft (216) to rotate an arm (208) on which one or more specimens (218) are coupled using fixing means (220)
The rotating propeller generates a uniform flow, and with the help of baffles uniform distribution of particles is achieved by minimum turbulence.
The fixing means can mount specimens and can further comprise one or more slotted circular plates (302) with radial slots that allow orientation of the one or more specimens.
The first and the second prime mover can be coupled with independent pulley drive mechanism to provide for transfer of rotary motion from the mover to the shaft.

7. In Depth Working (Cont.)
An engagement and disengagement coupling (222) can be installed as a connection means between second prime mover and second shaft.
The engagement and disengagement coupling is used to fix and take out the test specimens from the pot by opening the transparent lid (224).
The pot has inlet and drainage provisions.
The apparatus can withstand test velocity up to 32 m/s without suffering from non-uniform distribution.
Erosion of the one or more specimens is evaluated based on measurement of mass loss rate to evaluate erosion of the one or more test specimens.
If the propeller is rotated by means of a single shaft, the vortex so generated will increase with velocity, and their shedding will cause interference with shedding generating errors.

8. In Depth Working (Cont.)
Figure illustrates an exemplary representation of slotted angular plate.
The slotted angular plate (302) includes a number of radial slots/divisions (304).
Shape and dimensions of the plate is adapted to orient the test specimens in a desired impact angle range.
The slotted angular plate is brazed to fixture to orient the fixture and the test specimens at different angles in a desired range.

9. In Depth Working (Cont.)
Figure illustrates a test fixture.
The shape and dimensions of the test fixture is adapted to mount test specimens.
The test fixture can include a groove (402) to fix a test specimen with plane surface flushing to upper face (404) of the fixture.
The fixture can be oriented at different angles with respect to its rotational direction with the help of slotted angular plate and the fixture can be coupled with the plate by using a screw.
The fixture can be hanged vertically downward or can be installed vertically upwards through horizontal arm and center of the fixture can be kept at an equal distance from top cover and center of propeller.

10. Advantages
The present invention provides for a slurry pot testing apparatus :
To observe, understand, evaluate and thereby predict erosion behaviour of different materials and varying compositions of solid-liquid mixtures at high impact velocities and their probable effect on the holding elements through which they are carried or in which they are stored. This will help to optimise the requisite maintenance cycle for such holding elements and reducing downtime.
To precisely and quantitatively establish effect of various parameters by providing uniform suspension of solid particles in a slurry.
To minimise any chances of inherent errors and to generate better and accurate results for effective decision making.

11. Comparison Conventional Technology Present Invention
Propeller at the bottom
Propeller at some specific height from the bottom
Provision for propeller motion through single shaft
Has provision for two shafts moving in opposite direction providing minimum turbulence and uniform particle distribution
Restricted to moderate velocities up to 9m/s
Can be operated at velocities as high as 32 m/s
High turbulence, turbulence shedding may impact results
Low turbulence, minimal impact on results.
High possibility of errors leading to inaccurate results
Low possibility of errors leading to more accurate results

12. Technology transfer fees and royalties Licensing
Expectations
Technology transfer fees and royalties
Licensing
Target Industry
Chemical Industry
Coal industry
Oil & Gas industry
Steel Industry
Research industry

13. Noida (NCR) Office – Head Office
Contact Details
Noida (NCR) Office – Head Office
E-13, UPSIDC Site-IV, Behind Grand Venice, Greater Noida,
Contact Person: Ankit Kumar
Mobile No:
Contact No(s):+91-(120) , ,
Website: |
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