TWI770989B - Method of manufacturing solid recovered fuel - Google Patents

Abstract

A method of manufacturing solid recovered fuel (SRF) is adapted to mix and treat waste wood, sawdust, and waste plastic. The method includes a step of breaking the waste wood to a certain extent, a step of subjecting the waste wood to a sieving operation to collect the waste wood which does not exceed 30 cm and mixed metal scrap contained in the waste wood respectively, and a step of mixing the collected waste wood, sawdust, and waste plastic with a mixing device and stirring, thereby allowing these waste materials to rub against each other and squeeze during the stirring operation and thence coagulate to obtain solid recovered fuel (SRF) with various shapes. The solid recovered fuel can be used in the combustion for the energy conversion, thereby attaining the effect of resource reusing of wastes and being friendly to the environment.

Description

Solid state regeneration fuel (SRF) manufacturing method

The present invention relates to a method for converting wastes into energy utilization and processing, in particular to a method for manufacturing solid renewable fuel (SRF).

Whether it is the replacement of old items and furniture, or the redecoration of old houses, there are often discarded wooden furniture of different shapes and sizes, waste wood and waste plastic items removed from old decoration, etc., or wood Wood chips to be discarded in the process of processing and manufacturing, and the usual treatment method is to preliminarily treat these wastes, and then carry out landfill or direct incineration in order to effectively reduce the huge amount of waste. However, under the current situation of limited access to land resources, if the above-mentioned wastes are to be buried, it is not only necessary to have a wide range of burial sites to completely bury them, but it will cause soil pollution after burying. The land must wait for many years before it can be used again. Of course, if the incineration method is used, the gas generated after incineration will cause air pollution damage to the environment, and the ashes still need to be buried in a separate site, which will also cause secondary pollution to the environment. damage, needs to be improved.

In view of this, with the gradual shortage of natural fuels, there are many companies conducting research and development on the conversion of waste into energy fuels, such as the Republic of China Patent Publication No. 20123891 "Method for Making Derivative Fuels from Sludge", Zhonghua. The Republic of China Announcement No. I531425 Patent "Method for Making Biomass Fuel from Biological Sludge" and the Republic of China Announcement No. 431106 Patent "Production of High Combustion Efficiency Plant Fuel" and other previous patents, all of which describe the effective use of waste materials Convert it into a usable fuel; however, in each of the aforementioned cases, it is necessary to grind the waste material to less than 5mm or even into powder in the manufacturing process, and then add a cementitious material, and Through the cooperation of a press-molding granule or sheet molding machine, the waste materials are solidified and shaped into granules, fragments and other shapes of uniform size. In this way, the manufacturing cost will also be due to the increase of additional additives and the press-molded granules. or the addition of a sheet-forming machine, resulting in an increase in the manufacturing cost; therefore, the inventor of the present case hereby makes improvements and researches on the problems such as no need for additional additives, and no need to increase the use of a forming machine for granulation and sheet-making, in order to file the application of this case. .

Therefore, the purpose of the present invention is to provide a method for manufacturing solid renewable fuel (SRF), which can process the waste to be discarded into a solid renewable fuel (SRF) in a resourceful manner for burning for energy conversion, Effectively achieve the environmental protection effect of waste conversion and reuse.

Therefore, the manufacturing method of solid regenerated fuel (SRF) of the present invention includes a material preparation step, a crushing step, a screening step and a mixed molding step in sequence; wherein, the crushing step has a crushing device for processing the obtained waste wood. Crushed into pieces and flakes, and then in the screening step, the pieces and flakes of waste wood after crushing are screened in different sizes, and then according to the collection and at least 30 cm (inclusive) of the following waste wood, sawdust and waste wood Plastic, respectively carry out the subsequent mixing operation (that is, the mixing molding step), so that the waste wood, wood chips and plastics generate friction and extrusion during the mixing process to form a plurality of solid renewable fuels (SRF) with different shapes, In this way, the waste to be discarded can be effectively processed into a solid renewable fuel in a resource-based manner, which can be converted into energy after combustion, and effectively achieve the environmental protection effect of converting waste into valuable reuse.

FIG. 1 is a block diagram of a manufacturing process of a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the mixing process of the preferred embodiment.

The foregoing and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings.

Referring to FIG. 1, a preferred embodiment of the present invention, the manufacturing method of the solid regenerated fuel (SRF) includes a material preparation step, a crushing step, a screening step and a mixed molding step, etc.; wherein, the material preparation step is prepared and discarded. Waste wood with a calorific value of at least 3500~4500Kcal/kg, sawdust with a calorific value of at least 4000Kcal/kg (inclusive) or more, and waste plastic with a calorific value of at least 6000Kcal/kg (inclusive) or above, and The aforementioned moisture content of the waste wood is 10-40%, and the mixing ratio of the waste wood, wood chips and waste plastic can be 50-60% by weight: 15-20% by weight: 20-35% by weight.

Furthermore, in the crushing step, the above-mentioned waste wood can be placed in a crushing equipment, and the crushing equipment can be processed according to the set crushing size requirements, so that the waste wood can be processed by the crushing operation in the form of large volume. , in order to reduce the volume of the waste wood and form a plurality of blocks and sheets of different sizes. Of course, the waste plastic with a larger shape can also be crushed to reduce the size of the waste plastic; as for the screening process The step is equipped with a screening equipment to screen the waste wood in the best size after being crushed in the previous step. Therefore, in the setting of the screening program, only those with a size of 30 cm (inclusive) should be screened. The distinction between the following, 30 cm and above, and the waste metal mixed in the waste wood, etc., and the above-mentioned waste wood larger than 30 cm and above after screening can be processed by the crushing step to reduce the waste wood again. After the volume is re-entered, the screening step is re-screened. At the same time, the screened scrap metal can be collected and reused in different fields.

Continuing from the above, the mixing molding step is equipped with a mixing molding equipment, so as to mix and blend the waste wood chips, waste plastics obtained in the material preparation step, and the waste wood screened to be less than 30 cm (inclusive), of course, in order to make these materials To achieve full mixing, a stirring unit can be provided in the mixing and molding equipment, so that the materials can be fully stirred and stirred by the stirring unit, and in the mixing process, in view of the water content in the waste wood, the The raw material of waste plastic is petroleum, so when the waste wood, wood chips and waste plastic form mutual friction and extrusion during the mixing process, and temperature is generated during friction and mutual extrusion, through the generation of temperature, the waste wood can be The water in the waste wood is released, and the wood or fiber in the waste wood chips will also be slightly plasticized into natural glue properties, and the waste plastic will further release oil through continuous friction and extrusion. This can use the moisture released by the waste itself, the nature of natural glue and oil as the cementing material, so that the waste wood, wood chips and waste plastic will be mixed during the mixing process, and then condensed into a plurality of different shapes. Solid regenerated fuel (SRF) in solid shape, and thus the manufacturing method of the solid regenerated fuel (SRF) can be completed.

Referring to Figures 1 and 2, during the manufacturing process, waste wood such as decorative dismantling and discarded wooden furniture, wood chips to be discarded and discarded plastic items generated in the process of wood processing and manufacturing are collected (i.e. step), since the waste wood is larger in size, and the collected waste plastic also has objects with larger shapes and sizes, at this time, the crushing equipment can be used to adjust the control of the size to be crushed to a value within the desired size range , so that the waste wood and plastic are respectively crushed, so that the waste wood and waste plastic are formed into a plurality of blocks and sheets of different sizes after being crushed, and then the screening size conditions are set by the screening equipment. , in order to screen the scrap wood with different sizes and sizes smaller than 30 cm (inclusive), and the size of the waste wood obtained by this screening is larger than 30 cm or more, can be crushed again. Process to effectively reduce the size of the waste wood, so that the waste wood will re-enter the screening treatment of the screening equipment after being crushed again, until the completion of the screening process The size of the waste wood meets the screening conditions, and the waste hardware screened in the screening process can be collected and used in different fields to achieve complete reuse of the waste, that is, the screening step is completed.

Continuing the above, the aforementioned waste wood, waste wood chips and waste plastics that have met the screening conditions and have different shapes are placed in the hybrid molding equipment one by one, and the mixed molding equipment is activated to make the waste The materials are stirred and moved by the stirring unit in the mixing and molding equipment, so that the waste wood, wood chips and waste plastics form friction, extrusion and collision with each other during the mixing process, and under the action of friction and extrusion, The waste wood and waste plastic will release moisture and oil respectively in the mixing molding equipment, and the waste wood chips will be slightly plasticized into natural glue properties, so that the released moisture and oil can be released through the sufficient stirring process. It can effectively form a cementitious material with a blending effect in the waste materials, so that the waste wood, wood chips and waste plastics can be gradually cemented with each other, so that the waste wood, After the mixing process of wood chips and waste plastics for a period of time, they will be condensed into a plurality of solid-state renewable fuels (SRF) with different shapes. After the final mixing process, the cemented solid renewable fuels ( SRF) is taken out from the hybrid molding equipment, so that the manufacturing method of the solid regenerated fuel (SRF) is completed. Of course, the state of the solid regenerated fuel (SRF) can be placed and then supplied for use; therefore, in this paper In the invention, if the waste wood, waste wood chips and waste plastics are manufactured at 2000 tons/month: 500 tons/month of waste wood chips: 1000 tons/month respectively, it can generate about 3500 tons/month of solid renewable fuel (SRF). ), and equipped with a calorific value of at least 4500~6000Kcal/kg, which can be quickly converted into energy, effectively achieving the environmental protection effect of waste resource reuse.

From the above description, the present invention does have the following advantages and effects:

1. The present invention collects and collects a large amount of discarded wood, wood chips and plastics, and then shreds them first, and then separates them from different sizes and scrap metals, so the method is the simplest and cost-effective. The cost of use is low, and the waste hardware separated by screening can be reused, which can reduce the pollution of waste to the environment.

2. In the mixing molding step of the present invention, without additionally providing cementitious materials, when stirring in the mixing process, the waste materials can generate temperature during mutual friction, extrusion and collision, thereby making the The characteristics of moisture, natural glue and oil quality hidden in each waste are effectively released to form a blending cementitious material, so that the waste wood, wood chips and plastics are condensed into a plurality of different shapes. Solid state renewable fuel (SRF), which can effectively reduce waste and achieve the environmental protection effect of reuse.

To sum up the foregoing, the manufacturing method of the solid regenerated fuel (SRF) of the present invention is implemented by means of the material preparation step, the crushing step, the screening step and the mixing molding step, etc., so as to effectively improve the waste recycling efficiency, and moreover, in the manufacturing process, Without the need to provide additional cementing materials, the wastes can be cemented with each other, and a plurality of solid-shaped solid renewable fuels (SRF) with different shapes can be formed, thus effectively reducing operating costs and waste. The environmental protection effect of material reduction and reuse.

However, the above descriptions are only to illustrate the preferred embodiments of the present invention, and should not limit the scope of implementation of the present invention. , shall still fall within the scope covered by the patent of the present invention.

Claims (3)

A method for manufacturing solid regenerated fuel (SRF), comprising: a material preparation step, wherein waste wood with a calorific value of at least 3500-4500Kcal/kg and wood chips with a calorific value of at least 4000Kcal/kg (inclusive) are added to Collect and collect waste plastics with a calorific value of at least 6000Kcal/kg (inclusive) and above, and the aforementioned moisture content of the waste wood is between 10 and 40%: a crushing step, which is equipped with a crushing equipment, which is aimed at The waste wood obtained in the previous step is subjected to crushing treatment to make it broken into blocks and sheets; in a screening step, the waste wood after crushing is screened according to size, so as to be at least 30 cm (inclusive) below and greater than 30 cm. The waste wood more than centimeters is collected and collected separately from the scrap metal mixed in it; and a mixed molding step, which is equipped with a mixed molding equipment, and the mixed molding equipment is collected according to the previous step. Including) the following waste wood is mixed with the wood chips and waste plastics, so that the waste wood, wood chips and plastics generate friction and extrusion during the mixing process, and the waste wood and waste plastics will release moisture and waste respectively. The oil is contained in the mixing and molding equipment, so that the released water, oil and the waste wood chips will be slightly plasticized into natural glue properties, which can effectively form a cementing material with a blending effect in the waste materials to condense into a natural glue. Solid regenerative fuel (SRF) in a plurality of solid shapes. The method for manufacturing solid renewable fuel (SRF) according to claim 1, wherein the screening step selects blocks and flakes that are larger than 30 cm and can be processed through a crushing step to reduce the size of the waste wood. The method for manufacturing solid renewable fuel (SRF) according to claim 1 or 2, wherein the mixing ratio of the waste wood, wood chips and waste plastic can be 50-60% by weight: 15-20% by weight: 20-35% weight percent.

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