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| Flow field analysis of walnut shell kernel airflow separation system |
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| DOI： |
| KeyWord:walnut shell and kernel airflow separation separation chamber deposition chamber flow field |
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| Abstract: |
| The structural parameters of the airflow separation equipment directly affect the internal flow field distribution. The influences of the structural parameters of the key mechanism separation chamber (thickness, length, length of the lower part of the feed inlet) and deposition chamber (width, length of the internal retaining plate and the position of the retaining plate at the shell inlet) on the internal flow field of the airflow separation of walnut shell kernel mixture were investigated. The shell kernel separation system was formed by the preferred key mechanism and the flow field analysis was performed to examine its suitability,and the feasibility of the flow field analysis of the shell kernel separation key mechanism in the design of the separation system was verified by comparing with the shell kernel separation system developed by the group. The results showed that the thickness of the separation chamber had a significant effect on the flow field distribution of the shell kernel separation chamber, and the length and position of the deposition chamber retaining plate had a great influence on whether the walnut shells could flow quickly to the shell outlet. The preferred parameters of the key mechanism were obtained as follows: the thickness of the separation chamber 90 mm, the length 1 200 mm, the length of the lower part of the feed inlet from the chamber 300 mm, the width of the deposition chamber 450 mm, the length of the two long retaining plates parallel to the corresponding inclined side plate at the lower part of the deposition chamber met the requirement of the same surface of the outer side of the end bending and the adjacent wall on the left and right sides of the shell outlet, and the position of the retaining plate at the shell inlet close to the shell inlet of the deposition chamber. The shell kernel separation system formed under the preferred mechanism parameters was suitable for shell kernel separation of all grades, and the flow field simulation analysis method was feasible in the design of key mechanism and separation system for shell kernel separation, and it could effectively shorten the equipment development cycle and reduce the equipment production cost. |
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