This invention relates to a process for making biomass fuel. Particularly this invention relates to a process for making biomass fuel in the form of pellets and / or briquettes from rice straw, wheat straw, wooden waste, etc.
BACKGROUND OF THE INVENTION
Nowadays farmers burn rice straw/ wheat straw in their fields which causes many problems, for example, air pollution, dangerous fire, reduced soil fertility. Air pollution is a serious problem in India and other countries also, because of air pollution, respiration disease, for example, Asthma, COVID, heart disease, stroke, chronic obstructive pulmonary disease, lung cancer, continuously increase, and severe in humans and animals also. Some conventional fuel and processes based on rice straw are available but they have a costly and lengthy process that does not stop the farmers from burning the straws in their field.
Chinese Patent application no. CN105271219A teaches about a straw-stem active charcoal preparing process, is characterized in that it comprises the following steps: a. by stalk of fresh corn after crusher in crushing, sends into mill oar machine and grinds form slurry; B. with the weight ratio of 0.5% ~ 1%, activator is added above-mentioned slurry, after stirring, carry out solid-liquid separation; C. isolated solids is sent into extrusion machine and extrude into garden column material; D. above-mentioned garden column material is entered the charing of airtight activation furnace, after cooling, obtain activated carbon product.
Chinese Patent application no. CN102050446A, teaches about a corn cob prepares process of active carbon, it is characterized in that having following steps: 1. corn cob is dried 20h~30h under 100 ?~120 ? temperature; 2. it is 0.4mm~0.8mm that the corn cob after will drying is crushed to particle diameter, obtains the corn cob particle; 3. the corn cob particle is mixed according to 1: 1~1: 3 weight ratio with powdered sodium carbonate, obtain mixture; 4. place microwave oven to carry out charing and activation mixture, microwave exposure power is 200W~700W, and microwave irradiation time is 5min~10min; 5. the mixture after will activating carries out pickling, washing, oven dry, grinding successively and obtains gac.
Chinese Patent application no. CN101070157A, teaches about a straw-stem active charcoal preparing process is characterized in that it comprises the following steps: A. with stalk of fresh corn after crusher in crushing, send into mill oar machine and grind form slurry; B. with 0.5%~1% weight ratio activator is added above-mentioned slurry, carry out solid-liquid separation after stirring; C. isolated solids is sent into extrusion machine and extruded into garden column material; D. above-mentioned garden column material gone into airtight activation furnace charing, after cooling, obtain activated carbon product.
One of the disadvantages is that the conventional process for making biomass fuel is that the process is costly.
Another disadvantage associated with the conventional process for making biomass fuel is that the process is lengthy.
Yet another disadvantage associated with the conventional process for making biomass fuel is that the operations in the process are handled by a skilled person.
Still another disadvantage associated with the conventional process for making biomass fuel is that the process uses furnaces which is harmful to the environment.
OBJECTIVE OF THE INVENTION
Therefore, an object of the present invention is to provide a process for making biomass fuel which obviates the disadvantages associated with the prior art.
Another object of the present invention is to provide a process for making biomass fuel which has very cheap cost making.
Yet another object of the present invention is to provide a process for making biomass which is an easy process.
Still another object of the present invention is to provide a process for making biomass fuel which is operated by an unskilled person.
A further object of the present invention is to provide a process for making biomass fuel which is an environment-friendly process.
STATEMENT OF THE INVENTION
According to this invention, there is provided a process for making biomass fuel comprising:
I. Collecting and cleaning plant straws at a storage unit;
II. Chipping the plant straws in the storage unit to obtain chips of a size of 3 – 15 mm;
III. Drying the chipped plant straws in the storage unit to obtain a moisture content in the range of 12 – 15 %;
IV. Briquetting / palleting the dried material to make biomass fuel at a temperature of 110 – 130 0C at a combustion force of 1150 – 1250 kg/sq. inch.
BRIEF DESCRIPTION OF THE DRAWINGS
A process for making biomass fuel, according to a preferred embodiment, is herein described and illustrated in the accompanying example.
DETAILED DESCRIPTION OF THE INVENTION
A process for making biomass fuel of the present invention is described with numerous specific details so as to provide a complete understanding of the invention. However, these specific details are exemplary details and should not be treated as the limitation to the scope of the invention. Throughout this specification the word “comprise” or variations such as “comprises or comprising”, will be understood to imply the inclusions of a stated element, integer or step, or group of elements, integers or steps, but not the exclusions of any other element, integer or step or group of elements, integers or steps.
A process for making biomass fuel comprises plant straws which are collected from agriculture fields or other sources. The collected plant straws are cleaned at a storage unit. The plant straws are chipped in the storage unit to obtain chips of a size of 3 – 15 mm. The chipped plant straws are dried in the storage unit to obtain a moisture content in the range of 12 – 15 %. The dried materials are Briquetted / palleted to make biomass fuel at a temperature of 110 – 130 0C at a combustion force of 1150 – 1250 kg/sq. inch.
The plant straw, for example, rice straw, wheat straw, corn straw, wooden waste, etc, is collected from farmers or other sources at a storage unit and cleaned for the unwanted dust, soil from the plant straws. After that, the plant straw is sent to the chipping section in the storage unit and chipped with the help of a chipper in 03-15 mm size. Wherein chipping is done with the help of a chipper, for example, simple chipper, Chipper-cum-grinder, Hammer-Mill-Grinder, etc. After the plant straw / materials are chipped, the materials are sent to the drying section in the storage unit. Wherein the materials are dried through at least one process, for example, hot air drying, sun drying, air drying in shade, etc. The materials are dried in the storage unit to obtain a moisture content in the range of 12 – 15 %. The dried materials are sent to the briquette machine/pallets machine to make biomass fuel in the form of briquettes and pallets respectively. Wherein 10-15 mm size of the chipped materials used for the briquetting process and 03-05 mm size of the chipped materials used for the palleting process. The dried materials are briquetted / palleted to make biomass fuel at a temperature of 110 – 130 0C at a combustion force of 1150 – 1250 kg/sq. inch.
Example 1
An example of the process for making biomass fuel in form of briquette is following,
Collecting and cleaning: 100 kg of a sample of rice straw is taken at a storage unit and cleaned unwanted dust, soil from the sample of rice straw.
Chipping: the sample of rice straw in the storage unit is chipped to a size of 12 mm with help of a simple chipper.
Drying: the chipped sample of rice straw in the storage unit is dried with help of a hot air dryer at a moisture content of 14 %
Briquetting: the dried materials are briquetted to make biomass fuel at a temperature of 118 0C at a combustion force of 1210 kg / sq. inch to obtain the biomass fuel in the form of the briauettes.
Example 2
An example of the process for making biomass fuel in form of pallets is following,
Collecting and cleaning: 200 kg of a sample of wheat straw is taken at a storage unit and cleaned unwanted dust, soil from the sample of rice straw.
Chipping: the sample of wheat straw in the storage unit is chipped to a size of 4 mm with help of a hammer-mill-grinder.
Drying: the chipped sample of wheat straw in the storage unit is dried with help of the sunlight at the moisture content of 13.5 %.
Palleting: the dried materials are palleted to make biomass fuel at a temperature of 122 0C at a combustion force of 1180 kg/sq. inch to obtain the biomass fuel in the form of pallets.
Certain features of the invention have been described with reference to the example embodiments. However, the description is not intended to be construed in a limiting sense. Various modifications of the example embodiments as well as other embodiments of the invention, which are apparent to the persons skilled in the art to which the invention pertains, are deemed to lie within the spirit and scope of the invention.

We claim:

1. A process for making biomass fuel comprising;
I. Collecting and cleaning plant straws at a storage unit;
II. Chipping the plant straws in the storage unit to obtain chips of a size of 3 – 15 mm;
III. Drying the chipped plant straws in the storage unit to obtain a moisture content in the range of 12 – 15 %;
IV. Briquetting / palleting the dried material to make biomass fuel at a temperature of 110 – 130 0C at a combustion force of 1150 – 1250 kg/sq. inch.
2. The process for making biomass fuel as claimed in claim 1, wherein chipping is done with the help of a chipper, for example, simple chipper, chipper-cum-grinder, hammer-mill-grinder, etc.
3. The process for making biomass fuel as claimed in claim 1, wherein the plant straw taken comprises at least one of, for example, rice straw, wheat straw, corn straw, wooden waste, etc.
4. The process for making biomass fuel as claimed in claim 1, wherein the drying is done by at least a process, for example, hot air drying, sun drying, air drying in shade, etc.
5. The process for making biomass fuel as claimed in claim 1, wherein the plant straw is chipped to a size of 10 – 15 mm to make biomass fuel in the form of briquettes.
6. The process for making biomass fuel as claimed in claim 1, wherein the plant straw is chipped to a size of 3 – 5 mm to make biomass fuel in the form of pellets.