Weighing method and weighing device for polysilicon

Abstract

The present invention provides a method for weighing polysilicon, comprising: sending the crushed polysilicon blocks transported upstream into corresponding feeding bins C according to different size ranges i , where 1≤i≤n, n is an integer, and C i The value of i is inversely proportional to the size of the corresponding polysilicon block; each feeding bin C is opened and closed successively in the order of 1 to n i The door of the bin makes the feeding bin C i The polysilicon block in the feed bin falls into the weighing hopper located under the outlet of each feeding bin and is weighed by the weighing unit under the weighing bin until the feeding bin C i The quality of the output polysilicon block reaches the i-th upper limit value S for the first time i Finally, close its door, and close the door of the previous feeding bin before opening the door of the latter feeding bin, so that each feeding bin is discharged one by one. Correspondingly, a polysilicon weighing device is provided. The invention can realize fully automatic high-precision quantitative weighing.

Description

technical field [0001] The invention relates to the technical field of polysilicon production, in particular to a polysilicon weighing method and a polysilicon weighing device. Background technique [0002] Today, with the rapid development of automated production, automatic packaging equipment plays an increasingly important role in the goal of reducing costs, increasing efficiency, and reducing human capital investment. With the high specifications of product packaging and high requirements of downstream customers put forward by enterprises, the high-precision quantitative weighing of polysilicon has become an important issue for polysilicon production enterprises. [0003] At present, polysilicon production enterprises at home and abroad have certain manual interventions in the automatic packaging process of products, such as manual monitoring and manual weight replenishment. Specifically, the current mainstream polysilicon production technology in the world is the impro...

AI Technical Summary

Problems solved by technology

Specifically, the current mainstream polysilicon production technology in the world is the improved Siemens method. The rod-shaped polysilicon produced by this technology will become irregular bodies with different sizes and shapes after crushing, resulting in inaccurate accuracy in the automatic weighing process. It is difficult to achieve high-precision quantitative weighing to control the quality of polysilicon entering the weighing equipment per unit time; and to achieve quantitative weighing with an accuracy of 0.5‰, polysilicon manufacturers at home and abroad generally add manual intervention and use Manually feed it to meet the corresponding accuracy requirements

[0004] Due to the addition of manual intervention in the polysilicon weighing process, it is impossible to achieve fully automated high-precision quantitative weighing, the weighing efficiency is low, and there is also a risk of polysilicon contamination

Moreover, manual intervention means that there may be subjective errors and misoperations in the weighing process, which makes it difficult to standardize the packaging quality of polysilicon, and is prone to quality errors, resulting in complaints from customers

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