JP6211824B2 - Effective use of waste fiber products - Google Patents

Description

  The present invention relates to a method for using waste fiber products as raw fuel by simply putting them into a cement firing furnace without selecting and processing the waste fiber products as a simple and effective method for using the waste fiber products.

  Waste fiber products have the problem that the recycling rate does not increase due to the high degree of compounding of materials, product diversity (types, colors, etc.), high fashionability, and complicated production and distribution structures. It is about 10% of consumption. Usually, in order to increase the recycling rate, it is necessary to sort materials and select and process them so as to meet the purpose of recycling. However, reuse, material recycling, and feedstock recycling are particularly difficult for the reasons described above.

  Also, in thermal recycling, there are many composite products with metals and the like, and fiber products are strong in crushing strength and difficult to crush. For effective use as fuel other than incineration, separation, cleaving, etc. A large amount of labor is required for pre-processing.

  As advanced recycling, there is recycling of waste PET fibers into fibers. After selecting and collecting only PET fiber products from various waste fiber products, energy is input at a dedicated recycling plant to re-synthesize the recycled products. There is a need to.

Japanese Patent No. 4058910

  The present invention provides an efficient thermal recycling method without sorting and processing waste fiber products.

  In the present invention, waste fiber products are packed in small containers as they are, without being sorted and processed (cut, crushed), and the whole small containers are put into a cement firing facility and used as raw materials and fuels.

  However, this does not deny the process of sorting out high-quality waste fiber products that can be used for reuse, material recycling, feedstock recycling, etc. This means that the waste fiber products collected by the sorting and unsuitable for recycling do not require further separation and processing.

  According to the present invention, it becomes possible to efficiently and economically recycle waste fiber products having a low recycling rate regardless of whether they are generated in large quantities. That is, in the past, a large amount of labor was required for sorting and processing (crushing, etc.) for use in thermal recycling. However, a large amount of labor can be saved by packing in a small container as it is. Furthermore, by combusting combustibles with cement having a very high energy utilization rate compared with general incineration, highly efficient thermal recycling becomes possible.

  In addition, since a small container requires a large amount of labor for transportation, it can be efficiently transported by a large transport machine by filling the small container into a larger container such as a flexible container.

  The waste fiber product put into the cement firing furnace according to the present invention has a high calorific value similar to that of coal, and thus has high utility value of thermal energy. In addition, since pre-processing such as sorting and processing (crushing) is not required, labor and energy consumption can be reduced. In addition, no burning equipment such as a burner is used for the cement firing furnace. No investment is required.

  It is relatively easy to introduce the social system of the present invention because waste fiber products are basically collected by a small container like the small container in the present invention.

  The waste fiber product in the present invention is not particularly limited in terms of calorific value, moisture, chemical composition, color, amount of combustion residue, and the like may be any cloth. Furthermore, as long as it consists of fibers, there is no limitation on the shape, woven fabric or non-woven fabric. For example, wastes such as clothing, woven or non-woven fabric scrolls, carpets, curtains, house interior material cloths, and car interior material cloths may be mentioned. Further, either chemical fiber or natural fiber may be used.

  The materials of waste fiber products are synthetic fiber, cotton, wool, fur, etc. Furthermore, metal fittings are iron, aluminum, brass, etc. Furthermore, buttons are shells, synthetic resins, etc., all of which are cement Used as a raw material and fuel for cement production. The utilization rate of raw materials is almost 100%, and the heat utilization rate as fuel exceeds 80%.

  In the present invention, the waste fiber product is packed in a small container. Small container packing is a flammable container that can divide fibers such as PP, PE, paper, cloth, and wood, or a container that can be easily destroyed in a cement furnace, and can be easily broken during transportation and handling. If there is no fear, it will not be restrict | limited especially. Examples include plastic and cloth bags.

  The size of the small container is not particularly limited as long as it is smaller than the inlet to be introduced into the cement furnace, but usually a small bag having a maximum length of 500 mm or less is recommended in terms of ease of handling. As a capacity | capacitance, it is about 1-100L.

  In the present invention, the transport from the generation site of the waste fiber product to the cement firing furnace is performed by further packing the small container into a large container, and the small container is taken out from the large container when the cement firing furnace is charged. preferable. Specifically, each company of all the routes of waste fiber product collection, such as waste fiber collection, uniform collection, and used clothing collection currently being conducted, collects a certain amount of unsuitable items for recycling, packs them into small containers, and then even larger containers They are packed in a collection place for mass transportation, and then transferred to mass transportation means such as trucks, wagons, ships, etc., and taken to a cement factory.

  Large containers for filling small containers are not particularly restricted, but usually, flexible containers or pallets of less than a few tons used for container transportation or truck transportation can be used. The cement firing furnace is taken out from the large container and again in a small container.

  In cement factories, small containers containing these waste fiber products are put into a cement firing furnace and used as a partial substitute for raw fuel using a combustible material input device. The injection into the cement baking furnace is good for smooth combustion at the portion where the gas temperature is 400 ° C. or higher. Preferably, if it can be introduced into a portion where the temperature is 800 ° C. or higher, problems such as a rapid decomposition rate of organic components and unburned substances are reduced, and dangers such as synthesis of harmful substances are eliminated. Specifically, a kiln front, a kiln bottom, a temporary name furnace, etc. are mentioned, It is preferable to throw in into the duct part which connects the pre-heater and kiln of a kiln bottom part especially.

  Although the charging method is not particularly specified, it is desirable for stable operation of the cement firing furnace that a small container can be charged at a constant rate.

  The raw fuel of waste fiber products was used in the following procedure.

  The late textile companies who collect used clothing collected by local governments to make waste cloths are collected from the recycling facilities of the local governments in their factories. This late textile company selects synthetic fiber, leather, and dirty clothes that are not suitable for waste at its own factory and selects them as waste for cement raw fuel. The waste for cement raw fuel is packed as it is into a small sachet (PP) of about 500 mm square and the mouth of the sachet is tightened. Furthermore, the flexible container (1 ton) is packed with a small bag and stored up to the collection amount of a general truck. A certain amount of flexible container is placed on a truck and transported to a cement factory. A small bag is taken out from the flexible container accepted by the cement factory, and the existing meat-and-bone meal is put into the kiln as it is as raw fuel. During this time, waste fiber products are recycled as raw fuel without any processing such as crushing and cutting. The recycling rate was 80% for fuel recycling and 100% for raw material recycling. Previously, it could not be recycled without adding some pretreatment as raw material and fuel, but this method made it possible to recycle without any trouble other than packing in a small bag.

Claims (2)

In the late textile company, the collected used clothing is selected as synthetic waste, leather, and dirty used clothing that is not suitable for waste.
This raw fuel target waste is packed in a small container as it is,
Pack it in a large container and transport it to a cement factory.
Remove the small bag from the large container accepted by the cement factory,
A method of using a waste fiber product, characterized in that the small container is put into a cement kiln as raw fuel . The method for using a waste fiber product according to claim 1 , wherein the large container is a flexible container or a pallet .