TWI431106B - High combustion efficiency of plant fuel process - Google Patents

Description

High combustion efficiency plant fuel process

The present invention relates to a process for producing a high-efficiency plant fuel, and more particularly to a process for recovering waste plants and forming a bulk fuel by drying, pulverizing, compressing and surface carbonizing.

In the early days, most of the abandoned crops, such as rice husks, straw or cornstalks, were mostly farmed and burned directly by farmers. However, the incineration process often caused air pollution near the farmland. In recent years, it has been counseled by relevant government agencies. With the concerted efforts of the various sectors of agriculture and agriculture, waste plants are treated by crushing, processing, composting, incineration and burial by themselves or by entrustment. However, as the environment is gradually deteriorating due to the shortage of energy, researchers are committed to Such abandoned plants are developed for use in green energy.
In the 383th issue of the Renewable Energy Report of the Scientific Development Journal, it is mentioned that solid waste-derived fuel is a process of crushing, sorting, drying, mixing additives and forming raw materials or wastes before heat conversion. Ingot fuel, which mentions that the biomass system refers to organic matter produced by organisms, and may be wood chips such as wood or husk, bagasse, pod or corn cob of agricultural waste, etc., but The raw material or waste itself after crushing, sorting and drying cannot be directly formed into the solid ingot fuel. Therefore, additives such as a binder are needed to facilitate the setting of the solid ingot fuel, and the additives such as the binder are mostly Chemical polymer, when burned, tends to volatilize toxic gases and cause pollution.

Accordingly, in view of the lack of conventional waste plant treatment, the present invention provides a process for high combustion efficiency plant fuel, the steps of which are:
A. Drying treatment: The plurality of discarded plants are pre-dried to a weight percentage of an average water content of 0.1% to 3%.
B. Smashing and stirring: The dried plants after drying are uniformly mixed by pulverization and stirring to form a powder of a plurality of small particles.
C. Surface carbonization molding: the powder formed by the waste plants is formed into a bulk by compression, and is sintered at a temperature of 200 to 400 degrees Celsius to carbonize the surface of the block to form Piece of fuel.
The drying treatment of the above step A is natural exposure or mechanical air drying.
The above-mentioned abandoned plant lines are rice husks, rice branches, hay or any vegetable fiber.
In the above step C, the powder of the waste plants is compressed by a mold to form the lump.
In the above step C, the optimum sintering temperature is in the range of 250 to 350 degrees Celsius.
The invention has the following advantages:
1. The present invention provides a method for producing a solid block fuel having a high calorific value by recovering waste plants, and does not add an additional chemical additive in the process, and has the characteristics of environmental protection and resource recovery.
2. In the present invention, after the waste plant is made into a powder, it is carbonized by compression and sintering, and its volume is small and the density is high. Therefore, the unit has a high calorific value and is easy to transport, and can be used for boiler combustion and the like.

First, referring to the first and second figures, the present invention is a process for high combustion efficiency plant fuel, and the steps are as follows:
A. Drying treatment: the plurality of discarded plants (1) are pre-dried to an average water content of 0.1% to 3% by weight, and the discarded plants (1) may be rice hulls, rice branches, hay or any vegetal Fiber, and the drying treatment method can be natural exposure or mechanical air drying, thereby reducing the water content inside the waste plants (1), making it easy to burn, and the combustion process does not generate excessive water vapor, and does not cause the burning machine Excessive rust.
B. Crushing and stirring: The dried plants (1) after the drying treatment are uniformly mixed to form a powder (2) of a plurality of small particles by pulverization and stirring.
C. Surface carbonization molding: the powder (2) formed by the waste plants (1) is compressed into a piece (3) in a mold (4), and since the step B is first The waste plant (1) is made into the powder (2), so the density of the block (3) will be higher and smaller than the direct compression of the waste plants (1), and the calorific value per unit volume is higher. It is more advantageous for transportation and use, and then the block (3) is sintered at a temperature ranging from 200 degrees Celsius to 400 degrees Celsius, and the optimum temperature for sintering is 250 degrees Celsius to 350 degrees Celsius, whereby The surface of the block (3) is carbonized to form a bulk fuel (5), and the block fuel (5) is carbonized on the surface, and a trace amount of moisture remains inside to provide sufficient support force to make the block The fuel (5) is not easily broken.
Moreover, since the average plant fiber has an average value of 0.65 tons of standard coal per ton, the block fuel (5) can effectively become a green energy source for environmental protection and reuse.

(1) ‧ ‧ Abandoned plants (2) ‧ ‧ powders (3) ‧ ‧ blocks (4) ‧ ‧ molds (5) ‧ ‧ block fuel

The first figure is a schematic diagram of the steps of the present invention.
The second figure is a schematic diagram of the operation flow of the present invention.

Claims (5)

A process for high combustion efficiency plant fuel, the steps are as follows:
A. Drying treatment: pre-drying a plurality of discarded plants to an average water content of 0.1% to 3% by weight;
B. pulverization and agitation: the dried plants after drying are uniformly mixed to form a plurality of small particles by pulverization and stirring;
C. Surface carbonization molding: the powder formed by the waste plants is formed into a bulk by compression, and is sintered at a temperature of 200 to 400 degrees Celsius to carbonize the surface of the block to form Piece of fuel. The process of high-efficiency plant fuel according to claim 1, wherein the drying process of step A is natural exposure or mechanical air drying. The process of high-efficiency plant fuel according to claim 1, wherein the waste plants are rice husks, rice branches, hay or any vegetable fiber. The process of high-efficiency plant fuel according to claim 1, wherein in step C, the powder of the waste plants is compressed by a mold to form the block. The process for high-efficiency plant fuel as described in claim 1, wherein in step C, the optimum sintering temperature is in the range of 250 to 350 degrees Celsius.