Method of manufacturing waste granulated plastics, and method for thermal decomposition of plastics
A technology for waste plastics and manufacturing methods, applied in plastic recycling, fuel, solid fuel and other directions, can solve the problems of insufficient effect, insufficient attention, uneven shape quality and apparent density of plastics, etc., to achieve good shape quality , the effect of less decomposition and high apparent density
Inactive Publication Date: 2008-09-24
NIPPON STEEL CORP
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Problems solved by technology
However, in the existing technology, this fact has not been sufficiently paid attention to, and this effect cannot be sufficiently exerted.
[0011] Therefore, in the existing technology, there is a problem that there is no sufficient knowledge for the proper production of plastic pellets, and only plastics with very variable shape quality and apparent density can be produced
Method used
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Effect test
Embodiment
[0058] Based on the present invention, the results of compression molding of waste plastic are as follows. Compared with conventional methods, the method of the present invention can produce plastic pellets for chemical raw materials with good shape quality. In such figure 1 As shown in the compression molding equipment of waste plastics, use such as figure 2 The screw press-in type compression molding machine shown is applied to the manufacturing results produced by mechanical operations under the conditions of the present invention when manufacturing 20 mm pellets to illustrate the effects of the present invention. In addition, as a comparative example, the effectiveness of plastic granules manufactured under mechanical operating conditions that deviate from the conditions of the present invention will also be described.
[0059] In the examples, waste plastics mixed together at a ratio of 22% by mass of film-like plastics having a thickness of 0.15 mm or less and 10% by mass ...
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Abstract
The invention provides a method for improving an apparent density and shape quality of a granulated waste plastic, produced by compression molding, for recycling them as raw materials for chemicals, and a method for thermally decomposing the granulated waste plastic economically, comprising the steps of: shredding the waste plastic containing not less than 15 mass% of film shaped plastic by shredder (1) to plastic fragments with a size suitable for compression molding treatment, compression molding the plastic fragments by a compression molding equipment (4) having through holes with a diameter of 5 to 80 mm and thereby producing a cylindrical granulated plastic. The granulated waste plastic is recycled as a raw material for chemicals. Further they may recycled by thermally decomposing in a coke oven or a blast furnace.
Description
Technical field [0001] The present invention relates to a technology related to a method of pre-processing as a recycling waste plastic to produce pellets by compression molding. In addition, it also relates to the thermal decomposition of the obtained plastic pellets to convert them into oil or gas. The method of the composition of the substance. Background technique [0002] Polyethylene, polystyrene, vinyl chloride and other plastics are widely used in containers, packaging, housings of home appliances, toys, etc., due to their excellent moldability and durability. However, as a result, it was also discarded in large quantities as waste. The generation of a large amount of plastic waste has become a social problem, especially the environmental and resource problems are more prominent. That is, when these waste plastics are incinerated, there is a problem that the incinerator is damaged due to the excessively high combustion temperature, and at the same time, toxic gases and di...
Claims
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IPC IPC(8): B29B17/00C10B53/00C10L5/48C21B5/00B29B9/10B29B9/06B29B9/08B29B17/04B29C48/345B29K23/00B29K105/26C08J11/10C10B53/07C10B53/08C10B57/04C21B5/02
CPCB29B2017/0496B29L2007/008C10L5/363B29B17/0412B29L2007/002B29B2017/046C21B5/026C10B53/08B29B9/06C10L5/361C10L5/48B29B17/0036B29B9/08B29B17/04C10B57/04B29B17/0026Y02W30/62Y02P10/20B29B17/00
Inventor 茨城哲治池田元树小关常雄后藤裕规
Owner NIPPON STEEL CORP