New energy biomass coupling fuel and production process

Abstract

The invention relates to the field of biomass fuels, and provides a new energy biomass coupling fuel and a preparation method thereof, the fuel is specifically formed by mixing and processing straws, other agricultural and forestry wastes and coal; wherein the straw and other agricultural and forestry wastes account for 10%-90% by weight, and the corresponding coal accounts for 90%-10% by weight; meanwhile, the production process comprises the steps of a) mixing, b) crushing, c) impurity removal, d) drying and e) cooling. According to the invention, different proportions correspond to different heat values, the use in multiple fields is met, the use range is expanded, the volatile value is stable, the emission of harmful gas is reduced on the basis of greatly reducing the sulfur content, and the basic national policy of energy conservation and emission reduction in China at present is met.

Description

Technical Field

[0001] The invention belongs to the field of biomass fuels, and in particular relates to a composite biomass fuel particle and a preparation method thereof. Background Art

[0002] In today's society, coal is an important basic energy source and important raw material in my country, and occupies a certain strategic position in the national economy. Coal has always accounted for more than 70% of my country's primary energy consumption, and my country's coal resources account for about 95% of the total energy.

[0004] The existing biomass fuel has a single ratio and cannot meet the needs of different fields. The volatility of the fuel is low and cannot meet the needs. At the same time, the sulfur content is high and pollutes the environment when burned. It does not conform to the current national policy of energy conservation and environmental protection. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a new energy biomass fuel particle and a preparation method thereof, which has flexible proportions, reasonable and efficient processes, and can ensure different production and combustion effects while significantly reducing environmental pollution.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new energy biomass coupling fuel, characterized in that it is composed of a mixed processing of straw and other agricultural and forestry wastes and coal; wherein the proportion of straw and other agricultural and forestry wastes is greater than 10%, and the corresponding proportion of coal is less than 90%, and the above are weight percentages.

[0007] Preferably, the straw has a calorific value of 1000-4200 kcal / kg, the coal has a calorific value of 600-8000 kcal / kg, and the calorific value of the coupled fuel after mixed processing is 1500-7000 kcal / kg.

[0008] Preferably, the fuel has a volatility of 10%-40%, a moisture content of 8%-25%, and a sulfur content of 0.01%-3%.

[0009] Preferably, the straw is dry straw or wet straw.

[0010] Preferably, the coal used is clean coal, thermal coal, anthracite, etc.

[0011] Preferably, other agricultural and forestry wastes include scraps, firewood, bark, peanut shells, branches, bark, shavings, etc.

[0012] Preferably, a catalyst is also included.

[0013] A specific processing technology of a new energy biomass coupled fuel is as follows:

[0014] a) Mixing: Mix straw, agricultural and forestry waste and coal according to the proportions;

[0015] b) pulverizing: the mixture formed after mixing is pulverized by a pulverizing device, and the pulverized mixture is in the form of powder, block or granules;

[0016] c) impurity removal: the crushed mixture is passed through an impurity removal device for impurity removal;

[0017] d) Drying: drying the impurity-removed mixture through a drying device, and controlling the moisture content during the drying process;

[0018] e) Cooling: The dried mixture is cooled to complete the process.

[0019] Preferably, if the straw and other agricultural and forestry wastes and coal selected in step a) are all dry raw materials, the drying and cooling steps c) and e) are not required and the production can be completed directly.

[0020] Preferably, steps b) and c) can be completed by an integrated crushing and impurity removal machine.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The raw material ratio in the fuel is flexible, and different ratios correspond to different calorific values, which can meet the use in multiple fields and expand the scope of use.

[0023] 2. Through processing technology, the sulfur content of the fuel is greatly reduced, thereby reducing the emission of toxic gases during the combustion process, which is in line with the country's current basic national policy of energy conservation and emission reduction.

[0024] 3. The present invention controls the drying process, so compared with the same type of biomass fuel, the moisture content is low and the combustion value is high. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] A new energy biomass coupled fuel, based on weight percentage:

[0028] Straw and other agricultural and forestry waste accounted for 91.7%, and the corresponding coal accounted for 8.3%;

[0029] According to the above ratio,

[0030] The combustion value of standard coal is 7000kcal / kg.

[0031] The combustion value of the fuel in the present invention is 3000 kcal / kg;

[0032] The standard coal has a volatile value of 12, a moisture content of 10, and a sulfur content of 3.

[0033] The volatility of the fuel in the present invention is greater than 25, the moisture content is 15, and the sulfur content is less than 0.5;

[0034] Embodiment 2:

[0035] A new energy biomass coupled fuel, based on weight percentage:

[0036] Straw and other agricultural and forestry waste account for 75%, and the corresponding coal accounts for 25%;

[0037] According to the above ratio,

[0038] The combustion value of standard coal is 7000kcal / kg.

[0039] The combustion value of the fuel in the present invention is 4000 kcal / kg;

[0040] The standard coal has a volatile value of 12, a moisture content of 10, and a sulfur content of 3.

[0041] The volatility of the fuel in the present invention is greater than 25, the moisture content is 15, and the sulfur content is less than 1;

[0042] Embodiment 3:

[0043] A new energy biomass coupled fuel, based on weight percentage:

[0044] Straw and other agricultural and forestry waste accounted for 62%, and the corresponding coal accounted for 38%;

[0045] According to the above ratio,

[0046] The combustion value of standard coal is 7000kcal / kg.

[0047] The combustion value of the fuel in the present invention is 4500 kcal / kg;

[0048] The standard coal has a volatile value of 12, a moisture content of 10, and a sulfur content of 3.

[0049] The volatility of the fuel in the present invention is greater than 25, the moisture content is 15, and the sulfur content is less than 1.5; Example 4:

[0050] A new energy biomass coupled fuel, based on weight percentage:

[0051] 50% of straw and other agricultural and forestry waste, and 50% of coal;

[0052] According to the above ratio,

[0053] The combustion value of standard coal is 7000kcal / kg.

[0054] The combustion value of the fuel in the present invention is 5000 kcal / kg;

[0055] The volatile value of standard coal is 12, the moisture content is 10, and the sulfur content is 2.

[0056] The volatility of the fuel in the present invention is greater than 20, the moisture content is 13, and the sulfur content is less than 1.2; Example 5:

[0057] A new energy biomass coupled fuel, based on weight percentage:

[0058] Straw and other agricultural and forestry wastes account for 25%, and the corresponding coal accounts for 75%;

[0059] According to the above ratio,

[0060] The combustion value of standard coal is 7000kcal / kg.

[0061] The combustion value of the fuel in the present invention is 6000 kcal / kg;

[0062] The standard coal has a volatile value of 11, a moisture content of 10, and a sulfur content of 2.

[0063] The volatility of the fuel in the present invention is greater than 18, the moisture content is 12, and the sulfur content is less than 1.6;

[0064] In combination with the above embodiments, the present invention realizes that different ratios correspond to different calorific values, which meets the use in multiple fields, expands the scope of use, stabilizes the volatility value, and reduces harmful gas emissions based on the greatly reduced sulfur content.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy biomass coupled fuel, characterized in that: It is composed of a mixture of straw and other agricultural and forestry wastes and coal; among them, the proportion of straw and other agricultural and forestry wastes is greater than 10%, and the corresponding proportion of coal slime is less than 90%, and the above are weight percentages.

2. A new energy biomass coupled fuel according to claim 1, characterized in that: It is applicable to all straws, agricultural and forestry wastes and various types of coal slime. The calorific value of the coupled fuel after mixed processing is 1500-7000 kcal / kg.

3. The new energy biomass coupled fuel according to claim 1, characterized in that: In the fuel, the volatility is 10%-50%, the moisture content is 10%-25%, and the sulfur content is 0.01%-3%.

4. According to the new energy biomass coupled fuel described in claim 2, the straw is selected from dry straw or wet straw.

5. According to the new energy biomass coupled fuel described in claim 2, the coal used is raw coal, clean coal, thermal coal, anthracite, etc.

6. The new energy biomass coupled fuel according to claim 1, characterized in that: The other agricultural and forestry wastes include scraps, firewood, bark, peanut shells, branches, peels, shavings, etc.

7. The new energy biomass coupled fuel according to claim 1, characterized in that: Also included are catalysts.

8. According to the new energy biomass coupled fuel of claim 1, the specific processing technology is as follows: a) Mixing: Mix straw, agricultural and forestry waste and coal according to the proportions; b) pulverizing: the mixture formed after mixing is pulverized by a pulverizing device, and the pulverized mixture is in the form of powder (10 cm-6000 mesh), block (width less than 50 mm, length less than 10 cm) or granule (size 4-50 mm, length less than 10 cm); c) impurity removal: the crushed mixture is passed through a screening impurity removal device for impurity removal; d) Drying: drying the impurity-removed mixture through a drying device, and controlling the moisture content during the drying process; e) Cooling: The dried mixture is cooled to complete the process.

9. A new energy biomass coupled fuel production process according to claim 8, characterized in that: If the straw and other agricultural and forestry wastes and coal selected in step a) are all dry raw materials, the drying and cooling steps c) and e) are not required and the production can be completed directly.

10. The new energy biomass coupled fuel production process according to claim 8, characterized in that: The steps b) and c) can be completed by a crushing and impurity removal machine.