Analysis of the most popular recycled glass packag

2022-07-13
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Analysis of recycled glass packaging

at present, there are four types of recycling of glass packaging bottles (cans): packaging reuse, recycling, raw material recycling and transformation. Now we will make an analysis of the relevant recycling technologies and methods

I. packaging reuse of waste glass packaging

1. reuse method

the so-called packaging reuse of waste glass bottle packaging refers to the packaging utilization in recycling (as mentioned above). It also has two forms of recycling, that is, the same kind of packaging and the same kind of packaging

the packaging utilization of the same goods is divided into the packaging utilization of the same brand and different brands. For example, the recycling of beer glass bottles for beer packaging is the same thing packaging. However, it is possible that the originally packaged beer is not the beer packaged after recycling. At this time, it is the packaging of different brands of the same thing packaging. On the contrary, the front and back packaging of the recycled bottles are the same brand beer, which is called the same thing packaging. At present, the recycling in the market is mostly the packaging of different brands with the same packaging

it is also common to use more food packaging within a period of time. For example, many vinegar manufacturers use recycled beer glass bottles, soy sauce glass bottles, etc. for vinegar packaging

at present, the recycling and reuse of glass bottle packaging is mainly the glass bottle of commodity packaging with large amount of low value. Such as beer bottles, soda bottles, soy sauce bottles, vinegar bottles and some cans. However, as high-value white wine bottles, drug (medical) bottles and cosmetic bottles are hardly recycled. See Figure 1 for the relationship between packaging recovery rate and commodity value. As shown in the figure, the higher the value of the commodity, the lower the recovery rate of the glass bottle

(2) reuse method

reuse process: sorting - Cleaning - cleaning (washing) - washing - washing - drying water - Disinfection - standby

picking and classification refers to the classification of glass bottles of different varieties and categories according to their structural shapes, so as to facilitate their use according to their purposes

cleaning refers to the removal of labels on the bottle body, especially plastic labels, and the removal of bottles with damaged and notched bottle mouth, so as to ensure that no accidents will occur during use (crushed or disabled bottles will crack due to mechanical pressure, resulting in chips falling into the articles in the bottle)

detergent cleaning is to remove the dirt in the bottle and make it more sanitary and clean

disinfection process is a necessary process for food or chemicals with strict requirements, especially for medical supplies or cosmetics

the biggest disadvantage of the reuse method is that it consumes a lot of water and energy, which should also be considered

II. Recycling of discarded glass packaging

recycling refers to the use of recycled glass bottles for the remanufacture of similar or similar packaging bottles. In essence, it is a kind of recycling of semi-finished raw materials for glass bottle manufacturing

specifically, the recycled glass bottles are preliminarily cleaned, cleaned, classified according to color and other pretreatment; The reheating melting is the same as the original manufacturing, and will not be detailed here; All kinds of glass packaging bottles are made from recycled materials through different processes such as blowing and adsorption

recycling furnace regeneration is suitable for all kinds of difficult or impossible reuse (such as the recycling method of broken glass bottles. This method consumes more energy than the previous method.

III. recycling of waste glass packaging raw materials

recycling of raw materials refers to the recycling method of using various glass packaging wastes that cannot be reused as additive raw materials for the manufacture of various glass products. The glass products here are not only glass packaging products, but also other building materials and daily-use glass products Product waste. This method consumes more energy than the first two recycling methods

proper addition of broken glass is helpful to the manufacture of glass, because broken glass can melt at lower humidity compared with other raw materials. Therefore, less heat is required for the solid work of recycling glass bottle making project, and the wear of furnace body can also be reduced. Research shows that it is appropriate to add about 30% of broken glass in glass manufacturing, so it can also improve the recovery of glass (see glass container manufacturing)

at present, about 20% of broken glass is used in the manufacturing process of glass container industry to promote melting and mixing with sand, limestone, alkali and other raw materials. 75% of the cullet comes from the production process of glass containers and 25% from the capacity after consumption

the following problems should be paid attention to when using waste glass packaging bottles (or broken glass frit) for the reuse of raw materials of glass products

(1) fine selection and removal of impurities

impurities such as metals and ceramics must be removed from the recycled glass bottles because the glass container manufacturers need to use high-purity raw materials. For example, there is a metal cover in the broken glass, which may form oxides that may interfere with the furnace operation; Ceramics and other foreign substances form defects in container production

(2) color selection

recycling color is also a problem. Because colored glass cannot be used in the manufacture of colorless flint glass, and only 10% green or flint glass is allowed to be added in the production of amber glass, the color of consumed broken glass must be selected manually or by machine. Broken glass can only be used to produce light green glass containers if it is not directly used for color selection

IV. transformation and utilization of waste glass packaging

transformation and utilization of recycled glass bottle packaging refers to the direct processing of recycled glass packaging into other useful materials

this utilization method is divided into two types, one is heating type and the other is non heating type

1. non heated type

non heated utilization is also called mechanical utilization. The specific method is to directly crush the recycled old glass according to the service conditions, or first conduct pre-treatment such as cleaning, classification and drying, and then crush them into small particles by mechanical method, or grind them into small glass balls for use. The utilization ways are as follows:

① use glass fragments as pavement assemblies, building bricks, glass wool insulation materials and honeycomb structural materials

② mix the crushed glass directly with the building material components to make the whole building prefabricated

③ the smashed container glass can also be used to make reflector materials and clothing decorations

④ it is used to decorate the building surface to make it have beautiful optical effect

⑤ it can be directly ground into various shapes, and then glued into arts and crafts or small decorations such as buttons

⑥ the mixture of glass and plastic wastes can be molded into synthetic slate products

⑦ can be used for production sewage pipeline

2. heating type

heating type utilization is to crush waste glass, melt it in a high-temperature melting furnace, and then prepare glass fiber by rapid drawing. The glass fiber can be widely used for making asbestos tiles, glass jars, various building materials and daily necessities

the production of glass bottles is one of the most energy consuming packaging products. It is very valuable for recycling. Figure 2 shows the recycling diagram of glass bottles. How to recycle glass packaging more effectively is a hot research topic at home and abroad

v. conclusion

among the four recycling methods of glass packaging studied above, packaging reuse is the most ideal recycling method, which is an energy-saving and economic recycling method. As a transformation utilization, this is an urgent recycling method to be developed. In the future, many new value-added technologies will be used for transformation and utilization

to sum up, the packaging reuse and recycling of waste glass packaging should be vigorously promoted, and the transformation and recycling should be strengthened in research and development. No matter which recycling method can save energy, it should be studied and popularized according to local conditions

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