CN111019731A - Biomass briquette fuel combined with various agricultural and forestry residues and preparation method thereof - Google Patents
Biomass briquette fuel combined with various agricultural and forestry residues and preparation method thereof Download PDFInfo
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- CN111019731A CN111019731A CN201911415428.1A CN201911415428A CN111019731A CN 111019731 A CN111019731 A CN 111019731A CN 201911415428 A CN201911415428 A CN 201911415428A CN 111019731 A CN111019731 A CN 111019731A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/442—Wood or forestry waste
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Agronomy & Crop Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention provides a biomass briquette fuel combined with various agricultural and forestry residues, which comprises the following components: wood chips, crop straws, economic crop residues, rice hulls, starch glue and urea. The biomass briquette fuel provided by the invention is reasonable in proportion, is not easy to coke, reduces the emission of various atmospheric pollutants, improves the burnout rate of the fuel, and reduces the unit calorific value cost.
Description
Technical Field
The invention relates to the technical field of biomass fuels, in particular to a biomass briquette fuel combining various agricultural and forestry residues and a preparation method thereof.
Background
The biomass fuel is prepared from wood chips, bamboo chips, branches, straws, plant shells and the like as raw materials by special machinery and special processes, and is free of any chemical additive, and the fuels formed by high-pressure low-temperature compression are collectively called as biomass fuels. The biomass fuel has high heat productivity, is clean and pollution-free, and is a high-tech environment-friendly product for replacing fossil energy. CO released during combustion of biomass fuel2Substantially corresponding to the CO absorbed by photosynthesis during its growth2So that the greenhouse gas CO of biomass combustion2Zero emission. The biomass fuel belongs to renewable energy, the photosynthesis of green plants cannot be stopped as long as sunlight exists, the biomass energy cannot be exhausted, the greenhouse gas keeps dynamic balance, and the problem of environmental pollution is solved.
Most of the existing biomass briquette fuels are single biomass components, wherein the corn straw briquette fuel is easy to form ash slag coking phenomenon due to unreasonable silica-alumina ratio in the corn straw; the rice hull formed fuel has large ash content, low burnout rate and low heat efficiency; the sulfur content of the peanut shell forming fuel is high, and the emission of sulfur dioxide in flue gas exceeds the standard; the cost of the single wood component molding fuel is high, and the use cost is increased.
Disclosure of Invention
In order to solve various problems of the biomass briquette, the invention provides the biomass briquette which has reasonable proportion, is not easy to coke, reduces the emission of various atmospheric pollutants, improves the burnout rate of the fuel and reduces the unit calorific value cost. The technical scheme is as follows:
the technical scheme of the invention is realized as follows:
the invention provides a biomass briquette fuel combined with various agricultural and forestry residues, which comprises the following components: wood chips, crop straws, economic crop residues, rice hulls, starch glue and urea.
As a further improvement of the invention, the biomass briquette fuel comprises the following components in parts by weight: 55-75 parts of wood chips, 30-40 parts of crop straws, 10-20 parts of cash crop residues, 10-20 parts of rice hulls, 1-3 parts of starch glue and 1-5 parts of urea.
The wood chips have high volatile content, so that the overall heat value of the fuel can be improved; the residue of the cash crops has high heat value and low burning point, is easy to ignite and burn out, and improves the burn-out rate of fuel; the rice hulls have low density, so that the fuel can form pores, oxygen can be fully contacted with the fuel, and the heat efficiency is improved; the existing boiler mostly adopts SCR or SNCR denitration technology, a denitration agent is mostly urea, and reasonable urea is added into biomass fuel, so that the generation of nitrogen oxide in the fuel combustion process can be reduced, and the ultra-clean standard of the nitrogen oxide in the emission of atmospheric pollutants is achieved; and the low-level heating value of the fuel is improved by a certain water absorption effect of the urea.
The SCR or SNCR technology used for the denitration of the flue gas of the modern boiler mostly adopts compounds with higher nitrogen content, such as ammonia gas, ammonia water, urea and the like. The urea is easier to obtain, the cost is low, potential safety hazards do not exist, and the urea is most widely applied to boiler flue gas denitration.
As a further improvement of the invention, the cash crop residue is oilseed residue or hulls.
As a further improvement of the invention, the residue of the cash crop is one or the combination of hickory nut skin, sesame skin, sunflower seed shell, peanut shell and castor shell.
The fat content in the oil residue or the shell of the pecan skin, the sesame skin and the like is high, the fat types are various, the lubricating effect is good, the friction between the biomass particles and the mold and between the biomass particles can be reduced, the biomass particle fat has the combustion-supporting effect, and the full combustion of fuel is facilitated.
As a further improvement of the present invention, the wood chips are wood cutting scraps, wood chips produced by wood processing, or a combination thereof.
As a further improvement of the invention, the wood chips are wood chips of larch, masson pine, pinus sylvestris, poplar, basswood or a combination thereof.
As a further improvement of the invention, the starch glue is one or a combination of corn starch glue, rice starch glue, potato starch glue and modified starch glue.
As a further improvement of the invention, the water content of the crop straws, the sawdust and the economic crop residues is less than or equal to 8 percent.
As a further improvement of the invention, the preparation method of the modified starch adhesive comprises the steps of adding acetic acid into partially hydrolyzed corn starch for acidification reaction to generate the partially esterified modified starch adhesive, wherein the viscosity of the adhesive is 35-40s, and the curing time is 2-3 min.
The invention further provides a preparation method of the biomass briquette fuel combined with various agricultural and forestry residues, which comprises the following steps:
(1) putting the wood chips, the crop straws, the economic crop residues and the rice husks into a crusher to be crushed according to a certain proportion, then putting the crushed materials into a drying box to be dried, and taking the dried materials out to obtain a dried mixture, wherein the water content of the dried mixture is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 400-450 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 480-520 ℃, reacting for 40-50s, continuing to heat to 535-570 ℃, reacting for 20-30s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 700-1000 ℃ under the protection of nitrogen, standing at constant temperature for 60-80min, discharging to obtain carbonized solid particles, uniformly mixing the particles with starch glue, and performing compression molding to obtain the starch-based composite material.
The invention has the following beneficial effects: the biomass briquette fuel provided by the invention is reasonable in proportion, is not easy to coke, reduces the emission of various atmospheric pollutants, improves the burnout rate of the fuel, and reduces the unit calorific value cost.
According to the modified starch glue prepared by the invention, firstly, the corn starch is partially hydrolyzed in an acid environment to obtain a high molecular chain segment with a large number of reaction active points, and then, the high molecular chain segment and acetic acid are subjected to an acidification reaction to generate the partially esterified starch glue, so that the viscosity of the glue is increased, and the curing time is shortened;
according to the solid biomass fuel obtained by performing high-temperature pyrolysis on biomass in stages, lignin in the biomass can be gradually softened and tightly bonded, the bonded biomass fuel is tight in internal structure, so that the fuel is longer in combustion time, the size is reduced, the transportation is facilitated, and the acting force between fibers in the biomass fuel is greatly improved through high-temperature carbonization treatment, so that the combustion time is prolonged, and the solid biomass fuel has a wide application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The raw materials comprise the following components in parts by weight:
55 parts of wood dust; the wood chips are produced by processing larch;
30-40 parts of crop straw;
10 parts of hickory peel;
the water content of the wood chips, the crop straws or the pecan peels is less than or equal to 8 percent;
10 parts of rice hulls;
1 part of rice starch glue;
1 part of urea.
The preparation method comprises the following steps:
(1) putting the wood chips, the crop straws, the pecan peels and the rice husks into a crusher according to a certain proportion, crushing the crushed materials, putting the crushed materials into a drying box, drying the dried materials, and taking the dried materials out to obtain a dry mixture, wherein the water content of the dry mixture is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 400 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 480 ℃, reacting for 40s, continuing to heat to 535 ℃, reacting for 20s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 700 ℃ under the protection of nitrogen, standing at a constant temperature for 60min, discharging to obtain carbonized solid particles, uniformly mixing the particles with rice starch glue, and performing compression molding to obtain the rice starch glue.
Example 2
The raw materials comprise the following components in parts by weight:
75 parts of wood dust; the wood chips are produced by processing masson pine;
30-40 parts of crop straw;
20 parts of peanut shells;
the water content of the sawdust or the peanut shells is less than or equal to 8 percent;
20 parts of rice hulls;
3 parts of corn starch glue;
5 parts of urea.
The preparation method comprises the following steps:
(1) putting the wood chips, the crop straws, the peanut shells and the rice husks into a crusher to be crushed according to a certain proportion, then putting the crushed materials into a drying box to be dried, and taking the dried materials out to obtain a dried mixture, wherein the water content of the dried mixture is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 450 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 520 ℃, reacting for 50s, continuing to heat to 570 ℃, reacting for 30s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 1000 ℃ under the protection of nitrogen, standing at a constant temperature for 80min, discharging to obtain carbonized solid particles, uniformly mixing the particles with the corn starch glue, and performing compression molding to obtain the corn starch glue.
Example 3
The raw materials comprise the following components in parts by weight:
65 parts of wood dust; the wood chips are leftovers of felling of pinus sylvestris;
35 parts of crop straw;
15 parts of castor shell;
the water content of the wood chips, the crop straws or the castor bean shells is less than or equal to 8 percent;
15 parts of rice hulls;
2 parts of modified starch glue;
3 parts of urea.
The preparation method of the modified starch glue comprises the following steps:
adding 5g of hydrochloric acid (25%) into 200g of water with the temperature of 90 ℃ to serve as a catalyst, adding 100g of corn starch, stirring and hydrolyzing for 5min, adding 15g of acetic acid, reacting for 10min, adjusting the pH value to 9.5 by using 20% of sodium hydroxide solution, discharging, and thus obtaining the modified starch adhesive, wherein the viscosity of the adhesive is 37s, and the curing time is 2.5 min.
The preparation method comprises the following steps:
(1) putting the wood chips, the crop straws, the castor bean shells and the rice husks into a crusher according to a certain proportion, crushing, then putting into a drying box, drying, and taking out to obtain a dry mixture, wherein the water content is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 420 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 500 ℃, reacting for 45s, continuing to heat to 545 ℃, reacting for 25s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 850 ℃ under the protection of nitrogen, standing at constant temperature for 70min, discharging to obtain carbonized solid particles, uniformly mixing the particles with the modified starch glue, and performing compression molding to obtain the modified starch glue.
Comparative example 1
Compared with example 3, the modified starch glue is replaced by corn starch glue, and other conditions are unchanged.
The raw materials comprise the following components in parts by weight:
65 parts of wood dust; the wood chips are leftovers of felling of pinus sylvestris;
35 parts of crop straw;
15 parts of castor shell;
the water content of the wood chips, the crop straws or the castor bean shells is less than or equal to 8 percent;
15 parts of rice hulls;
2 parts of corn starch glue;
3 parts of urea.
The preparation method comprises the following steps:
(1) putting the wood chips, the crop straws, the castor bean shells and the rice husks into a crusher according to a certain proportion, crushing, then putting into a drying box, drying, and taking out to obtain a dry mixture, wherein the water content is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 420 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 500 ℃, reacting for 45s, continuing to heat to 545 ℃, reacting for 25s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 850 ℃ under the protection of nitrogen, standing at constant temperature for 70min, discharging to obtain carbonized solid particles, uniformly mixing the particles with the corn starch glue, and performing compression molding to obtain the corn starch glue.
Comparative example 2
Compared with example 3, the dry mixture is directly put into a muffle furnace to be heated to 850 ℃ and kept standing for 70min at constant temperature.
The raw materials comprise the following components in parts by weight:
65 parts of wood dust; the wood chips are leftovers of felling of pinus sylvestris;
35 parts of crop straw;
15 parts of castor shell;
the water content of the wood chips, the crop straws or the castor bean shells is less than or equal to 8 percent;
15 parts of rice hulls;
2 parts of modified starch glue;
3 parts of urea.
The preparation method of the modified starch glue comprises the following steps:
adding 5g of hydrochloric acid (25%) into 200g of water with the temperature of 90 ℃ to serve as a catalyst, adding 100g of corn starch, stirring and hydrolyzing for 5min, adding 15g of acetic acid, reacting for 10min, adjusting the pH value to 9.5 by using 20% of sodium hydroxide solution, discharging, and thus obtaining the modified starch adhesive, wherein the viscosity of the adhesive is 37s, and the curing time is 2.5 min.
The preparation method comprises the following steps:
(1) putting the wood chips, the crop straws, the castor bean shells and the rice husks into a crusher according to a certain proportion, crushing, then putting into a drying box, drying, and taking out to obtain a dry mixture, wherein the water content is not higher than 8%;
(2) and (3) putting the dried mixture into a muffle furnace, heating to 850 ℃ under the protection of nitrogen, standing at constant temperature for 70min, discharging to obtain carbonized solid particles, uniformly mixing the particles with the modified starch glue, and performing compression molding to obtain the modified starch glue.
Test example 1
The biomass briquette fuels prepared in examples 1 to 3 of the present invention and comparative examples 1 and 2 were measured according to the technical specification of the eu CEN/TS335 solid biomass fuel, and the results are shown in table 1.
TABLE 1
As can be seen from the data in Table 1, the biomass briquette fuel prepared by combining various agricultural and forestry residues has high thermal efficiency and calorific value, energy-saving effect, low sulfur content, environmental friendliness and wide application prospect.
Compared with the prior art, the biomass briquette fuel provided by the invention has the advantages of reasonable proportion, difficult coking, reduction in emission of various atmospheric pollutants, improvement in fuel burnout rate and reduction in unit calorific value cost.
According to the modified starch glue prepared by the invention, firstly, the corn starch is partially hydrolyzed in an acid environment to obtain a high molecular chain segment with a large number of reaction active points, and then, the high molecular chain segment and acetic acid are subjected to an acidification reaction to generate the partially esterified starch glue, so that the viscosity of the glue is increased, and the curing time is shortened;
according to the solid biomass fuel obtained by performing high-temperature pyrolysis on biomass in stages, lignin in the biomass can be gradually softened and tightly bonded, the bonded biomass fuel is tight in internal structure, so that the fuel is longer in combustion time, the size is reduced, the transportation is facilitated, and the acting force between fibers in the biomass fuel is greatly improved through high-temperature carbonization treatment, so that the combustion time is prolonged, and the solid biomass fuel has a wide application prospect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The biomass briquette fuel combined with various agricultural and forestry residues is characterized by comprising the following components: wood chips, crop straws, economic crop residues, rice hulls, starch glue and urea.
2. The biomass briquette fuel combining various agricultural and forestry residues as claimed in claim 1, wherein the biomass briquette fuel comprises the following components in parts by weight: 55-75 parts of wood chips, 30-40 parts of crop straws, 10-20 parts of cash crop residues, 10-20 parts of rice hulls, 1-3 parts of starch glue and 1-5 parts of urea.
3. The biomass briquette fuel combining various agricultural and forestry residues as claimed in claim 1, wherein the residue of economic crops is oilseed residue or hulls.
4. The biomass briquette fuel combining multiple agricultural and forestry residues as claimed in claim 3, wherein the residue of the economic crop is one or a combination of pecan peel, sesame peel, sunflower seed shell, peanut shell and castor bean shell.
5. The biomass briquette fuel combined with various agricultural and forestry residues, as claimed in claim 1, wherein the wood chips are wood cutting leftovers, wood chips produced by wood processing, or a combination thereof.
6. The biomass briquette fuel combining various agricultural and forestry residues as claimed in claim 5, wherein the wood chips are wood chips of larch, masson pine, pinus sylvestris, poplar, basswood or a combination thereof.
7. The biomass briquette fuel combining various agricultural and forestry residues as claimed in claim 1, wherein the water content of the crop straws, the wood chips and the economic crop residues is less than or equal to 8%.
8. The biomass briquette fuel combined with various agricultural and forestry residues as claimed in claim 1, wherein the starch glue is selected from one or a combination of corn starch glue, rice starch glue, potato starch glue and modified starch glue.
9. The biomass briquette fuel combined with various agricultural and forestry residues as claimed in claim 1, wherein the preparation method of the modified starch adhesive is to partially hydrolyze corn starch, then add acetic acid to generate an acidification reaction, so as to generate a partially esterified modified starch adhesive, wherein the viscosity of the adhesive is 35-40s, and the curing time is 2-3 min.
10. A method for preparing a biomass briquette fuel combined with a plurality of agricultural and forestry residues as claimed in any one of claims 1 to 9, which comprises:
(1) putting the wood chips, the crop straws, the economic crop residues and the rice husks into a crusher to be crushed according to a certain proportion, then putting the crushed materials into a drying box to be dried, and taking the dried materials out to obtain a dried mixture, wherein the water content of the dried mixture is not higher than 8%;
(2) putting the dried mixture into a muffle furnace, heating to 400-450 ℃ under the protection of nitrogen, reacting for 1min, continuing to heat to 480-520 ℃, reacting for 40-50s, continuing to heat to 535-570 ℃, reacting for 20-30s, naturally cooling to room temperature after the reaction is finished, taking out the solid-liquid mixture, and filtering the solid-liquid mixture to obtain filter residue for later use;
(3) cleaning 75% ethanol of the filter residue for 1-2 times, heating on a heating furnace to volatilize ethanol, drying in a drying oven, taking out the filter residue after drying, adding urea, and mixing uniformly to obtain a precursor;
(4) and putting the precursor into a muffle furnace, heating to 700-1000 ℃ under the protection of nitrogen, standing at constant temperature for 60-80min, discharging to obtain carbonized solid particles, uniformly mixing the particles with starch glue, and performing compression molding to obtain the starch-based composite material.
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| CN112410090A (en) * | 2020-09-14 | 2021-02-26 | 承德华净活性炭有限公司 | Biomass energy charcoal and preparation method thereof |
| CN114774179A (en) * | 2022-03-15 | 2022-07-22 | 陇南陇锦园油橄榄开发有限责任公司 | Olive pomace treatment technology |
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| US20130202905A1 (en) * | 2009-10-23 | 2013-08-08 | David H. Blount | Delignification of biomass containing lignin and production of adhesive compositions and methods of making lignin cellulose compositions |
| CN101892106A (en) * | 2010-07-01 | 2010-11-24 | 东华大学 | Method for preparing chestnut shell-based biomass charcoal with loose and porous structure |
| CN106536760A (en) * | 2014-07-21 | 2017-03-22 | 希乐克公司 | Processing biomass |
| CN107338081A (en) * | 2017-08-19 | 2017-11-10 | 神木富瑞环保型煤开发有限责任公司 | A kind of semi-coke moulded coal environmental protection binding agent and its application method |
| CN108624377A (en) * | 2018-06-11 | 2018-10-09 | 佛山腾鲤新能源科技有限公司 | A kind of preparation method of high heating value biomass fuel |
| CN109097140A (en) * | 2018-09-21 | 2018-12-28 | 河南博顿生物科技有限公司 | A kind of biomass fuel of resistive connection slag |
| CN110079369A (en) * | 2019-05-08 | 2019-08-02 | 江西省红壤研究所 | A method of charcoal fuel is prepared using kudzu |
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| CN112410090A (en) * | 2020-09-14 | 2021-02-26 | 承德华净活性炭有限公司 | Biomass energy charcoal and preparation method thereof |
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