CN104726159A - Preparation method of composite modified biomass solid briquette fuel - Google Patents
Preparation method of composite modified biomass solid briquette fuel Download PDFInfo
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- CN104726159A CN104726159A CN201510120836.XA CN201510120836A CN104726159A CN 104726159 A CN104726159 A CN 104726159A CN 201510120836 A CN201510120836 A CN 201510120836A CN 104726159 A CN104726159 A CN 104726159A
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- 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
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- 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
Abstract
The invention discloses a preparation method of composite modified biomass solid briquette fuel. The preparation method of the composite modified biomass solid briquette fuel comprises the following steps: removing impurities from biomass, and crushing the biomass; carrying out hydrothermal treatment and collecting solid products, liquid products and associated gases; drying the collected modified solids, then smashing, adding an economic heat increasing agent and an economic binding agent, and uniformly mixing; and adjusting uniformly mixed briquetting material to be appropriate in moisture content, and obtaining briquette fuel in briquetting equipment. The preparation method of the composite modified biomass solid briquette fuel has the advantages that briquetting characteristic of a raw material is greatly improved, the aims of reducing briquetting energy consumption, increasing fuel thermal value and prolonging life of a mould can be achieved, the bottleneck problem that widespread use of the biomass solid briquette fuel is restricted can be solved, and requirement on the biomass raw material is low, so that all kinds of raw materials can be adopted; besides, the raw material can be easily smashed after being subjected to hydrothermal treatment, smashing energy consumption can be reduced, the added heat increasing agent and binding agent are low in cost and quantity, and a process is simple, so that industrial production can be realized.
Description
Technical field
The invention belongs to biomass energy utilization and field of solid waste treating technology, particularly a kind of preparation method of compound modified biomass solid molding fuel.
Background technology
At present, the whole world is faced with the dual-pressure of energy and environment.On the one hand, the socioeconomic development need energy, as power, because fossil energy reserves are limited, calculates by current consumption, and world petroleum resource is inciting somebody to action approach exhaustion between 50 years to 80 years from now on; On the other hand, overconsumption fossil oil, has broken natural energy and carbon balance, has brought the environmental problem that depletion of the ozone layer, global warming, acid rain etc. are day by day serious.Therefore there is environmental protection, great attention that the exploitation of biomass energy of clean and sustainable use feature are subject to many countries, United Nations Development Programme, the world energy sources council are all classified as the first-selection of renewable energy source.Food and Argriculture OrganizationFAO is thought, biomass energy will become the important component part of the energy in future, and expanding its utilization is reduce discharging CO
2important channel.China clearly proposes, and reach 15% to the gross domestic product Carbon emission of the year two thousand twenty unit than reduction by 40 ~ 45%, the proportion of non-fossil energy in energy expenditure in 2005, greatly developing renewable energy source is the major measure realizing this strategic objective.China is a large agricultural country, there is a large amount of biomass resources, only agricultural crop straw just has kind more than 20, more than 700,000,000 ton can be produced every year, it is one of country of enriching the most of biomass resource amount in the world, but the agro-ecology mass-energy gone out of use every year or burn accounts for more than 50% of total amount, the random burning of agricultural crop straw in season of especially receiving causes very serious atmospheric pollution and the huge waste of biomass resource.In view of the above circumstances, the task that recovery energy become very urgent to alleviate current energy environment issues is carried out to the biomass resource that China's reserves are huge.
Biomass energyization utilizes and mainly comprises generating (direct combustion or mixed combustion), gasification (anaerobically fermenting or anoxic), compact formed (can be divided into spiral squeezing type, piston ram-type and rotary extrusion type three class), carbonization and direct as life in the countryside fuel etc.In above various utilization ways, rotary squeezing is compact formed has the advantages such as technique is simple, productivity is high, and biomass molding fuel (Biomass Densification Briquetting Fuel, BDBF) density and intensity higher, be convenient to transport and burning, become the mainstream technology of the developed countries such as America and Europe gradually.
Because biomass have property of raw material (material composition, particle diameter and moisture etc.) uppity singularity, and all kinds of property of raw material differs greatly, the domestic research to this technology is started late, and (biomass profiling equipment is improved by feed equipment at first, but the material composition of biomass fuel and granulated feed, operational path and production status are all different), basic theory is not perfect; Biomass flow forming technology exists three in actual applications and compares distinct issues: molding device energy consumption is high; Die wear is fast; Shaped fuel calorific value is low.
On the one hand, in moulding process, between material and mould, severe friction can increase power consumption, aggravates die wear, increase production cost; On the other hand, it is lower that the feature of biomass material itself determines its calorific value, cannot reach the grade of coal quasi-fossil fuel.By carrying out composite modified process to biomass material, be effective method to improve its shaping characteristic, to reduce die wear, increase combustion heat value.
Consult domestic and foreign literature, patent CN 103525499 A discloses a kind of composite modifying method optimizing garbage derivatived fuel thermal property, by adding CaO, MgO dehumidizer and coal, breeze or discarded black oil solid combustible thing and KMnO
4, Na2O
2ignition dope, to realize the regulation and control to garbage derivatived fuel calorific value and water ratio, but required additive types is more.Patent CN 102942977 A discloses a kind of composite biomass fuel compact and preparation method thereof, the raw material weight ratio of component of this combined type briquetting is mallee bark powder 70% ~ 74%, bamboo chaff 24% ~ 30%, calcium oxide powder 2% ~ 3%, can reach and improve the shortcoming that pure mallee bark biomass solid formed fuel calorific value is low, ash content is large, and temporary without considering for the lifting of processability.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of compound modified biomass solid molding fuel, pass through composite modification technology, expection reaches the multiple effect that lubrication is energy-conservation, improve die life, increase combustion heat value, to solve the bottleneck problem of the application of restriction biomass compact forming technology, applying of biomass of making greater efforts to promote rotary press modelling fuel technology.
The technical solution realizing the object of the invention is:
A kind of preparation method of compound modified biomass solid molding fuel disclosed in the present invention, comprises the following steps:
Step one: the biomass material of the lignocellulose-containings such as agricultural crop straw, wood chip and forestry waste is carried out pre-treatment, utilizes scalping and tramp iron separator remove impurity and are crushed to below particle diameter 5mm;
Step 2: pretreated biomass material is carried out hydrothermal treatment consists, collects and obtains modified biomass solid product and liquid by-product and associated gas;
Step 3: by collect hydrothermal treatment consists modified biomass solid dry, be crushed to below particle diameter 1mm after oven dry, then add massfraction be 1 ~ 8% economical gain of heat agent and massfraction be the binding agent of 2 ~ 5%, mix;
Step 4: the molding materials mixed is modulated to water ratio 12 ~ 18%, under the pressure of 50 ~ 80Mpa, extrusion molding is density is 0.9 ~ 1.2g/cm
3solid fuel.
The present invention compared with prior art, has the following advantages:
(1) preparation method of composite modified solid molding fuel proposed by the invention, the object simultaneously realizing reducing shaping energy consumption, promoting fuel combustion calorific value and extend die life can be reached, the bottleneck problem of restriction biomass solid formed fuel widespread use can be solved, promote the popularization of biomass solid formed fuel technology.
(2) the present invention requires low to biomass material, can adapt to different kind organism raw material, can promote the efficiency utilization of biomass resource greatly.
(3) in the present invention, biomass material is through hydrothermal treatment consists, and the gas produced and product liquid can carry out higher value application, reduce costs; After solid product drying after hydrothermal treatment consists, easily pulverize, effectively can improve property of raw material.
(4) raw material type that will add required for the present invention is few, the economical gain of heat agent of required interpolation, and total adding proportion is not high, and realize technique simple, cost is low, is beneficial to and realizes suitability for industrialized production.
Embodiment
The invention discloses a kind of preparation method of compound modified biomass solid molding fuel, comprise the following steps:
Step one: the biomass material of the lignocellulose-containings such as agricultural crop straw, wood chip and forestry waste is carried out pre-treatment, utilizes scalping and tramp iron separator remove impurity and are crushed to below particle diameter 5mm; Impurity elimination object is to remove the successive modified process of impact and the impurity of extrusion molding process, and being crushed to below particle diameter 5mm is to promote fully contacting of hydrothermal treatment consists Raw and treatment solution, raising hydrothermal treatment consists efficiency.
Step 2: pretreated biomass material is carried out hydrothermal treatment consists, hydrothermal conditions is 200 ~ 250 DEG C, and the treatment time is 1h, collects and obtains modified biomass solid product and liquid by-product and associated gas; Pretreated biomass material is carried out hydrothermal treatment consists, to improve fuel value on the one hand, another aspect is that the biomass solid after hydrothermal treatment consists is very easily crushed to below granularity 1mm, reduce Grin-ding energ7, simultaneously the liquid by-product that produces of hydrothermal treatment consists and associated gas can carry out higher value application.
Step 3: the hydrothermal treatment consists modified biomass solid collected is dried, the drying temperature of hydrothermal treatment consists solid product is not higher than 110 DEG C, below particle diameter 1mm is crushed to after oven dry, add again massfraction be 1 ~ 8% economical gain of heat agent and massfraction be the binding agent of 2 ~ 5%, mix, wherein, economical gain of heat agent is one or more in used oil, raw glycerine or coarse colza meal, and binding agent is starch; Mixed with economical gain of heat agent and binding agent by biomass solid after hydrothermal treatment consists, object is to improve fuel value, reduces shaping energy consumption, promotes fuel quality; The used oil adopted, raw glycerine or coarse colza meal all have higher calorific value, have certain lubrication simultaneously, and the starch adopted has the effect strengthening bond effect between raw material; By this composite modified process, saving energy and reduce the cost in biomass material extrusion molding process easily can be realized, and significant increase fuel quality.
Step 4: the molding materials mixed is modulated to water ratio 12 ~ 18%, under the pressure of 50 ~ 80Mpa, extrusion molding is density is 0.9 ~ 1.2g/cm
3solid fuel; Suitable water ratio and forming pressure contribute to ensureing the quality of shaped fuel and reducing shaping energy consumption and die wear, under the condition of molding of 12 ~ 18% water ratio and 50 ~ 80MPa, can not increase shaping energy consumption when ensureing that shaped fuel has higher quality; Density is 0.9 ~ 1.2g/cm
3biomass granule fuel be convenient to transport, store and use.
The following example is to further explanation of the present invention and supplements, and does not constitute any limitation the present invention.Percentage composition in following embodiment is mass percent.
Embodiment 1
With the rice straw of seasoning for raw material, be crushed to below 5mm, requirement is not done to water ratio, utilize scalping and tramp iron separator to remove impurity.Pretreated stalk is carried out hydrothermal treatment consists, and hydrothermal conditions is 200 ± 1 DEG C, and the treatment time is 1h.Rear separated and collected solid product, phlegma product and associated gas are processed.
Solid product after hydrothermal treatment consists is dried at 105 DEG C of temperature, is then crushed to below granularity 1mm.Add used oil and starch, mix, the used oil added is 1%, and starch is 5%.Mixed raw material is modulated to water ratio 12%, utilizes feeding mechanism to send into ring die forming machine and be shaped to biomass solid fuel (forming pressure is about 50MPa), use after cooling packing.
Embodiment 2
With wood raw material, be crushed to below 5mm, requirement is not done to water ratio, utilize scalping and tramp iron separator to remove impurity.Pretreated wood raw material is carried out hydrothermal treatment consists, and hydrothermal conditions is 250 ± 1 DEG C, and the treatment time is 1h.Rear separated and collected solid product, phlegma product and associated gas are processed.
Solid product after hydrothermal treatment consists is dried at 110 DEG C of temperature, is then crushed to below granularity 1mm.Add raw glycerine and starch, mix, the raw glycerine added is 8%, and starch is 3%.Mixed raw material is modulated to water ratio 18%, utilizes feeding mechanism to send into ring die forming machine and be shaped to biomass solid fuel (forming pressure is about 60MPa), use after cooling packing.
Embodiment 3
With the Wheat Straw of wood chip and seasoning for raw material, be crushed to below 5mm, requirement is not done to water ratio, utilize scalping and tramp iron separator to remove impurity.Pretreated biomass material is carried out hydrothermal treatment consists, and hydrothermal conditions is 220 ± 1 DEG C, and the treatment time is 1h.Rear separated and collected solid product, phlegma product and associated gas are processed.
Solid product after hydrothermal treatment consists is dried at 105 DEG C of temperature, is then crushed to below granularity 1mm.Add coarse colza meal, mix, to add coarse colza meal be 4%, starch 2%.Mixed raw material is modulated to water ratio 15%, utilizes feeding mechanism to send into spiral squeezing type forming machine and be shaped to biomass solid fuel (forming pressure is about 80MPa), use after cooling packing.
Embodiment 4
With the Wheat Straw of seasoning for raw material, be crushed to below 5mm, requirement is not done to water ratio, utilize scalping and tramp iron separator to remove impurity.Pretreated biomass material is carried out hydrothermal treatment consists, and hydrothermal conditions is 210 ± 1 DEG C, and the treatment time is 1h.Rear separated and collected solid product, phlegma product and associated gas are processed.
Solid product after hydrothermal treatment consists is dried at 105 DEG C of temperature, is then crushed to below granularity 1mm.Add coarse colza meal and raw glycerine, mix, to add coarse colza meal be 4%, raw glycerine content is 4%, starch 2%.Mixed raw material is modulated to water ratio 15%, utilizes feeding mechanism to send into piston impact briquetting machine and be shaped to biomass solid fuel (forming pressure is about 70MPa), use after cooling packing.
Claims (6)
1. a preparation method for compound modified biomass solid molding fuel, is characterized in that, comprises the following steps:
Step one: the biomass material of the lignocellulose-containings such as agricultural crop straw, wood chip and forestry waste is carried out pre-treatment, utilizes scalping and tramp iron separator remove impurity and are crushed to below particle diameter 5mm;
Step 2: pretreated biomass material is carried out hydrothermal treatment consists, collects and obtains modified biomass solid product and liquid by-product and associated gas;
Step 3: by collect hydrothermal treatment consists modified biomass solid dry, be crushed to below particle diameter 1mm after oven dry, then add massfraction be 1 ~ 8% economical gain of heat agent and massfraction be the binding agent of 2 ~ 5%, mix;
Step 4: the molding materials mixed is modulated to water ratio 12 ~ 18%, under the pressure of 50 ~ 80Mpa, extrusion molding is density is 0.9 ~ 1.2g/cm
3solid fuel.
2. the preparation method of compound modified biomass solid molding fuel according to claim 1, is characterized in that, hydrothermal conditions is 200 ~ 250 DEG C, and the treatment time is 1h.
3. the preparation method of compound modified biomass solid molding fuel according to claim 1, is characterized in that, the drying temperature of hydrothermal treatment consists solid product is not higher than 110 DEG C.
4. the preparation method of compound modified biomass solid molding fuel according to claim 1, is characterized in that, economical gain of heat agent is one or more in used oil, raw glycerine or coarse colza meal, and the massfraction of interpolation is 5%; Described binding agent is starch, and the massfraction of addition is 3%.
5. the preparation method of compound modified biomass solid molding fuel according to claim 1, is characterized in that, described modulation water ratio is 15%.
6. the preparation method of compound modified biomass solid molding fuel according to claim 1, it is characterized in that, described forming pressure is 60Mpa, and described extrusion process facilities and equipments are ring die forming machine, piston impact briquetting machine or spiral squeezing type forming machine.
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| CN201510120836.XA CN104726159A (en) | 2015-03-19 | 2015-03-19 | Preparation method of composite modified biomass solid briquette fuel |
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Cited By (3)
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| CN106047947A (en) * | 2016-06-01 | 2016-10-26 | 卞佳林 | Preparation method of plant fiber nano-particles |
| CN107987911A (en) * | 2017-11-20 | 2018-05-04 | 华中科技大学 | One kind is based on additive agent modified biomass by hydro-thermal-formation solid fuel process |
| CN112500899A (en) * | 2020-10-27 | 2021-03-16 | 怀宁县泰华新能源科技有限公司 | Low-corrosion biomass fuel |
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Application publication date: 20150624 |