CN113801711A - A kind of preparation method of double high carbon - Google Patents
A kind of preparation method of double high carbon Download PDFInfo
- Publication number
- CN113801711A CN113801711A CN202111066525.1A CN202111066525A CN113801711A CN 113801711 A CN113801711 A CN 113801711A CN 202111066525 A CN202111066525 A CN 202111066525A CN 113801711 A CN113801711 A CN 113801711A
- Authority
- CN
- China
- Prior art keywords
- high carbon
- double
- double high
- carbonization
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000003763 carbonization Methods 0.000 claims abstract description 40
- 239000010902 straw Substances 0.000 claims abstract description 25
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 24
- 239000004571 lime Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 13
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 12
- 241000609240 Ambelania acida Species 0.000 claims abstract description 11
- 239000010905 bagasse Substances 0.000 claims abstract description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002023 wood Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000010298 pulverizing process Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims abstract description 3
- 238000012986 modification Methods 0.000 claims abstract 2
- 230000004048 modification Effects 0.000 claims abstract 2
- 238000000465 moulding Methods 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 11
- 230000000996 additive effect Effects 0.000 claims description 9
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 6
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 6
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 6
- 239000001099 ammonium carbonate Substances 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 4
- 239000004375 Dextrin Substances 0.000 claims description 3
- 229920001353 Dextrin Polymers 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 235000012216 bentonite Nutrition 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 235000019425 dextrin Nutrition 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 235000013877 carbamide Nutrition 0.000 claims 2
- 239000004067 bulking agent Substances 0.000 claims 1
- 238000001354 calcination Methods 0.000 abstract description 12
- 238000007493 shaping process Methods 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 6
- 238000010000 carbonizing Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 240000000111 Saccharum officinarum Species 0.000 abstract description 2
- 235000007201 Saccharum officinarum Nutrition 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 abstract 3
- 239000003245 coal Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 235000019738 Limestone Nutrition 0.000 description 5
- 239000002154 agricultural waste Substances 0.000 description 5
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 5
- 239000003830 anthracite Substances 0.000 description 5
- 239000000571 coke Substances 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- -1 barks Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 240000002791 Brassica napus Species 0.000 description 1
- 235000006008 Brassica napus var napus Nutrition 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000219146 Gossypium Species 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013325 dietary fiber Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 235000012015 potatoes Nutrition 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- 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
- C10L5/447—Carbonized vegetable substances, e.g. charcoal, or produced by hydrothermal carbonization of biomass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/28—Cutting, disintegrating, shredding or grinding
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
本发明公开了一种双高炭的制备方法，将秸秆、木渣、蔗髓粉碎后加入添加剂，经搅拌、定型及炭化成型制得。所述的添加剂为氧化钙、硫酸钙、蓬松剂及结构改造剂。相关设备包括粉碎机、超重力搅拌机、双级螺杆制型机和炭化炉。粉碎机的出料口连接超重力搅拌机，超重力搅拌机连接双级螺杆挤压机的入料口，双级螺杆挤压机的出料口连接炭化炉的入口。使用本方法可以实现秸秆、木渣、蔗髓等的可再生资源化利用，制备出的双高炭可替代传统化石能源，用做煅烧石灰的燃料，可有效提高石灰的质量与活性，减少煅烧石灰中的化石能源使用量，降低能耗，减少污染物的排放。
The invention discloses a preparation method of double-high carbon, which is prepared by pulverizing straw, wood bagasse and sugarcane pith, adding additives, stirring, shaping and carbonizing. The additives are calcium oxide, calcium sulfate, fluffing agent and structure modification agent. Associated equipment includes pulverizers, supergravity mixers, two-stage screw formers and carbonization furnaces. The discharge port of the pulverizer is connected to the supergravity mixer, the supergravity mixer is connected to the feed port of the double-stage screw extruder, and the discharge port of the double-stage screw extruder is connected to the inlet of the carbonization furnace. Using the method can realize the utilization of renewable resources such as straw, wood slag, cane pith, etc. The prepared double high carbon can replace traditional fossil energy and be used as the fuel for calcining lime, which can effectively improve the quality and activity of lime and reduce calcination. The amount of fossil energy used in lime reduces energy consumption and pollutant emissions.
Description
Technical Field
The invention belongs to the field of environment-friendly renewable energy utilization of calcined lime, and particularly relates to a preparation method of double high carbon.
Background
Biochar is also known as machine-made carbon, regenerated carbon, artificial carbon, and smokeless fine-washing carbon. It is made up by using wood or plant fibre through the processes of extrusion processing, high-temp. carbonization and processing into carbon rod-like material. The hollow biochar can be divided into triangular, quadrangular, pentagonal and hexagonal shapes according to the shape; according to the carbonization temperature, the method can be divided into high-temperature carbon, medium-temperature carbon and low-temperature carbon. The differences are as follows: the high-temperature carbon is quickly fired by a high-temperature furnace (the carbonization temperature is more than 800 ℃), has hard texture and high density and can be deposited in water. The charcoal content is large, the volatile component and the moisture are small, and no flame exists during combustion, so that the charcoal-free flame-retardant material is suitable for all occasions using charcoal; the medium-temperature carbon is formed by firing at medium temperature (550-800 ℃), has high mechanical strength, higher carbon content than low-temperature carbon and higher density; the low-temperature carbon is prepared by firing at low temperature (350-550 ℃), and has loose and porous texture, low mechanical strength, low carbon content and large ash content.
The biochar is different from other common charcoals in that:
the method is environment-friendly: the method does not cut down the forest, utilizes the straw, bamboo and wood product waste, mushroom dregs and the like as raw materials, changes waste into valuable, and can be continuously regenerated and recycled.
High calorific value: the fixed carbon content is more than 80%, and the calorific value is 7000-8000 kcal/kg.
Cleaning and sanitation: no smoke, no ash head, no flame, natural falling of carbon residue during combustion, ash content of about 2-6%, less residual ash, and easy combustion.
Fourthly, no harmful chemical substances are contained: no peculiar smell, no toxicity, no pollution, long combustion time and less than 15 percent of volatile matter
Low water content: the water content is less than 5%, the shape is regular, the structure is reasonable, the use is convenient, and the size and the specification are more uniform.
The main raw materials for producing the biochar are many, and mainly comprise agricultural wastes such as straws, barks, bagasse and the like. The straw is a general term of stem leaf (ear) part of mature crops. Typically refers to the remainder of wheat, rice, corn, potatoes, oilseed rape, cotton, sugar cane pith and other crops (typically roughages) after harvesting the seed. The straws are mostly used as fuel and burned except that a small amount of straws are used for gaskets and feeding livestock and a part of straws are used for composting. The smoke formed by burning the straws can cause the reduction of air visibility and the reduction of visible range, directly influence the normal operation of civil aviation, railways and expressways, easily cause traffic accidents, influence personal safety and cause serious pollution problems. The burning of the agricultural wastes such as the straws and the like is easy to ignite surrounding inflammable matters, so that the burning and the continuous operation are caused, once the barley fire of the wheat field is caused, the control is difficult, and the economic loss is caused. Especially near mountain forests, the consequences are rather unfortunate; the incineration of the agricultural wastes such as the straws and the like also enters the ground to three thirds, microorganisms in the ground surface are burned, humus and organic matters are mineralized, the field incineration of the straws destroys the balance of the biological system, changes the physical properties of the soil, aggravates soil hardening, destroys land capability, aggravates drought, and affects the growth of crops; a large amount of toxic and harmful substances are generated by burning the agricultural wastes such as straws and the like, and the physical and psychological health of people is threatened. Therefore, it is very important to enhance the resource utilization of crops such as straw.
Lime (also known as calcium oxide) is the product of calcining limestone, chalk or other carbonate materials at high temperatures. The main fuels for the current lime calcination are: coke, anthracite, bituminous coal, lignite, peat, firewood, heavy oil, various coal gases and the like, wherein the coke is the best solid fuel. The coke is not only high to 6000 ~ 7000 big calorie/kg of calorific capacity, and fixed carbon is up to more than 90%, and mechanical strength is high, is difficult for being crushed by the lime stone, and the coke is when the coking, and the volatile substance almost all spills over (is less than 2%), reduces the interior nodulation phenomenon of kiln and improves product quality. However, coke is generally less used in calcining lime because it is expensive.
Anthracite is the fuel which is used for calcining lime more commonly at present. The anthracite has the characteristics of high fixed carbon content of more than 80%, high calorific value of 5700-6500 kcal/kg, low volatile content of more than 10% compared with other coal types, relatively less coking and the like, and is widely used in calcined lime. It should be noted that the quality indicators described above fluctuate due to the different origins. In the lime calcining process, coal blocks with different particle sizes are added, so that the coal blocks can not be completely combusted well. The coal blocks can not be completely combusted, so that not only can unburned carbon particles be generated, but also the quality of lime is influenced finally; and the combustion is incomplete, the limestone is easy to be burnt incompletely, the phenomenon of light burning occurs, the quality of lime is influenced, and the energy consumption is increased. If the pulverized coal is sprayed into the vertical kiln for combustion, the nozzle is easy to block and the normal rotation of the bottom screw cone is influenced.
The use of other commonly used fuels, such as heavy oil, natural gas and artificial gas, is subject to transport distances and costs, is less used and has special requirements for the structure of the lime kiln.
If the biochar is directly used for replacing coal to be burnt in the lime kiln, the technical problem does not exist in terms of heat productivity. Because the heat value of the biochar is more than 6200-8000 kcal/kg, the carbon content is more than 90 percent, and the heat value of the anthracite or standard coal is 6000-6500 kcal/kg, and the carbon content is about 90 percent. The biochar and various performance indexes are equivalent to those of anthracite. However, since the biochar is fragile and has low mechanical strength, the biochar is easily extruded and crushed into powder in the process of mixing with limestone and adding into a vertical kiln for calcination, the problems of blockage of a discharge hole ventilation system or a bottom screw cone and the like are easily caused, and certain technical difficulties also exist in the application of the biochar in the process of calcining lime.
How to use renewable energy sources in the process of calcining lime kilns becomes one of the challenges which are placed in the front of the lime industry. How to replace fossil energy with renewable energy (biochar) in the lime calcining process is one of the urgent challenges that must be faced in the future health development process of the lime industry.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for preparing double high carbon, so that the prepared double high carbon is suitable for calcining limestone.
The technical scheme for solving the technical problems is as follows: a preparation method of double high carbon comprises the following steps:
(1) crushing: cutting one or more mixtures of straws, wood residues and bagasse pith to obtain raw material particles;
(2) adding an additive: weighing an additive, and adding the additive into the raw material particles to obtain a mixture;
(3) stirring: putting the mixture into a super-gravity stirrer, and uniformly stirring;
(4) shaping: feeding the material obtained in the step (3) into a double-stage screw molding machine for pressing;
(5) carbonizing and molding: and (4) feeding the material obtained in the step (4) into a carbonization furnace for carbonization and molding, and obtaining the double-high carbon of the invention after carbonization and molding.
The crushing is to crush the straws into slag with the length of less than 1mm by a crusher.
The straw accounts for 80-90% of the mixture.
The calcium oxide is 150-200 meshes and 85-98% of calcium oxide, and the amount of the added calcium oxide accounts for 5-10% of the proportion of the mixture.
The calcium sulfate accounts for 3-5% of the mixture.
The fluffing agent is urea, ammonium bicarbonate or a composition of urea and ammonium bicarbonate, and the structure modifying agent is one or more of lime, dextrin, water glass and bentonite. The proportion of the fluffing agent and the structural improvement agent in the mixture is less than or equal to 5 percent.
The stirring is to stir the crushed straws and the additives into fine powder in a gravity stirrer at a stirring speed of 45 r/min.
The carbonization molding is rapid carbonization molding under the conditions that the pressure is 0.8MPa and the firing temperature is 850 ℃.
The used equipment comprises a pulverizer, a super-gravity stirrer, a double-stage screw molding machine and a carbonization furnace. The discharge port of the pulverizer is connected with a hypergravity mixer, the hypergravity mixer is connected with the feed inlet of a two-stage screw extruder, and the discharge port of the two-stage screw extruder is connected with the inlet of a carbonization furnace. The connections are connected by a conveyor belt.
The hypergravity stirrer is a double-shaft stirrer.
The invention has the beneficial effects that:
(1) the method improves the dependence of calcined lime on fossil energy, and effectively solves the problems of insufficient combustion of kiln fuel and the like.
(2) Realizing high-efficiency renewable cyclic utilization of agricultural wastes, various carbon-containing organic matters and the like.
(3) The energy utilization rate and the quality of lime are improved, and the recovery and the utilization of the subsequent process of carbon dioxide are facilitated.
(4) In the production process, the discharge of various pollutants can be greatly reduced, and the effects of economy, safety, high efficiency, energy conservation and environmental protection are achieved.
Drawings
FIG. 1 is a process flow diagram of the apparatus of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
A process for preparing dual-high carbon includes such steps as pulverizing straw, adding additive, drying, shaping, charring and shaping. The used equipment comprises a pulverizer, a super-gravity stirrer, a double-stage screw molding machine and a carbonization furnace. The discharge port of the pulverizer is connected with a hypergravity mixer, the hypergravity mixer is connected with the feed inlet of a two-stage screw extruder, and the discharge port of the two-stage screw extruder is connected with the inlet of a carbonization furnace. The connections are connected by a conveyor belt.
The straw comprises bagasse pith, various crop straws, wood residues, barks and other plant fiber raw materials. The gravity stirrer is a double-shaft stirrer, the power of a motor is 7.5KW, the diameter of a blade is 400mm, the rotating speed of the blade is 47.6r/min, and the maximum treatment capacity is 1000 kg/h. The double-stage screw molding machine is a JZK series double-stage vacuum extruder, and the basic structure of the double-stage screw molding machine comprises a frame, a feeding system, an extrusion system, a transmission system, a heating and cooling system, an electric control system and the like.
The carbonization furnace is a continuous double-cylinder structure carbonization furnace. The required heat of retort is provided by water gas circulation, and cooling device adopts multistage water-cooling, carries hot water to the retort front end through the pipeline, utilizes the waste heat to make the raw materials preliminary preheat the drying, has realized the cyclic utilization of resource, has practiced thrift the energy consumption.
Example 1:
the invention discloses an example of a preparation method of double high carbon, which comprises the following steps:
(1) crushing: feeding the wood residues into a pulverizer to be stirred and cut for 10min, wherein the stirring speed is 50r/min, and obtaining crushed wood particles with the particle size of 1mm after cutting;
(2) adding an additive: weighing the following raw materials in percentage by weight: adding 5% of 200-mesh calcium oxide with the mass ratio of 85%, 3% of calcium sulfate, 1.5% of urea and 0.5% of dextrin into 90% of crushed wood particles to obtain a mixture;
(3) stirring: putting the mixture obtained in the step (2) into a super-gravity stirrer, stirring and reacting for 50min, wherein the blending rotating speed is 600r/min, and then taking out the mixture, wherein the surface water content is 1% for later use;
(4) shaping: and (4) feeding the material obtained in the step (3) into a double-stage screw molding machine for pressing.
(5) Carbonizing and molding: and (4) feeding the material obtained in the step (4) into a carbonization furnace for carbonization. The carbonization temperature is 850 ℃, and the carbonization time is 3 h. After carbonization, the double-high carbon of the invention is obtained.
The reaction pressure in this example was 0.8 MPa. The continuous double-drum structure carbonization furnace of the embodiment has the cylinder size of 1000mm and the power of a rotating motor of 55 kw.
The power of the double-stage screw molding machine in the molding machine of the embodiment is 7.5KW, the diameter of the blade is 400mm, and the rotating speed of the blade is 50 r/min.
The technical indices of example 1 are shown below
Example 2:
this example is another example of the method for preparing dual high carbon according to the present invention, and includes the following steps:
(1) crushing: feeding the bagasse pith into a grinder to be stirred and cut for 10min, wherein the stirring speed is 45r/min, and obtaining bagasse pith particles with the diameter of 1mm after cutting;
(2) adding an additive: weighing the following raw materials in percentage by weight: adding 7% of 150-mesh calcium oxide with the mass ratio of 95%, 4% of calcium sulfate, 2% of ammonium bicarbonate and 1% of water glass into 86% of bagasse pith particles to obtain a mixture;
(3) stirring: putting the mixture obtained in the step (2) into a super-gravity stirrer, stirring and reacting for 45min, wherein the blending rotating speed is 550r/min, and then taking out the mixture, wherein the surface water content is 1% for later use;
(4) shaping: and (4) feeding the material obtained in the step (3) into a double-stage screw molding machine for pressing.
(5) Carbonizing and molding: and (4) feeding the material obtained in the step (4) into a carbonization furnace for carbonization. The carbonization temperature is 850 ℃, and the carbonization time is 3 h. After carbonization, the double-high carbon of the invention is obtained.
The reaction pressure in this example was 0.8 MPa. The continuous double-drum structure carbonization furnace of the present embodiment. The size of the cylinder is 1000mm, and the power of the rotating motor is 55 kw.
The power of the double-stage screw molding machine in the molding machine of the embodiment is 7.5KW, the diameter of the blade is 400mm, and the rotating speed of the blade is 47.6 r/min.
The technical index of example 2 is shown below
Example 3:
the manufacturing method for producing the double high carbon comprises the following steps:
(1) crushing: feeding the bagasse pith into a grinder to be stirred and cut for 10min, wherein the stirring speed is 40r/min, and obtaining bagasse pith particles with the diameter of 1mm after cutting;
(2) adding an additive: weighing the following raw materials in percentage by weight: adding 10% of 150-mesh 98% calcium oxide, 5% of calcium sulfate, 3.5% of ammonium bicarbonate and 1.5% of bentonite into 80% of bagasse pith particles by mass to obtain a mixture;
(3) stirring: putting the mixture obtained in the step (2) into a super-gravity stirrer, stirring and reacting for 40min, wherein the blending rotating speed is 500r/min, and then taking out the mixture, wherein the surface water content is 1% for later use;
(4) shaping: and (4) feeding the material obtained in the step (3) into a double-stage screw molding machine for pressing.
(5) Carbonizing and molding: and (4) feeding the material obtained in the step (4) into a carbonization furnace for carbonization. The carbonization temperature is 850 ℃, and the carbonization time is 3 h. After carbonization, the double-high carbon of the invention is obtained.
The reaction pressure in this example was 0.8 MPa. The continuous double-drum structure carbonization furnace of the present embodiment. The size of the cylinder is 1000mm, and the power of the rotating motor is 55 kw.
The power of the double-stage screw molding machine in the molding machine of the embodiment is 7.5KW, the diameter of the blade is 400mm, and the rotating speed of the blade is 45 r/min.
The technical index of example 3 is shown below
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066525.1A CN113801711A (en) | 2021-09-13 | 2021-09-13 | A kind of preparation method of double high carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111066525.1A CN113801711A (en) | 2021-09-13 | 2021-09-13 | A kind of preparation method of double high carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113801711A true CN113801711A (en) | 2021-12-17 |
Family
ID=78895136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111066525.1A Pending CN113801711A (en) | 2021-09-13 | 2021-09-13 | A kind of preparation method of double high carbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113801711A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854466A (en) * | 2022-04-13 | 2022-08-05 | 圣沐环保机械科技(江苏)有限公司 | Fuel prepared by newly solidifying fly ash and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910989A (en) * | 2015-05-12 | 2015-09-16 | 天津神侬环保科技有限公司 | Powder cleaning fuel |
| CN105969473A (en) * | 2016-06-01 | 2016-09-28 | 山东沾化亿元宝农业种植有限公司 | Jerusalem artichoke straw fuel bar and preparing method thereof |
| CN106381187A (en) * | 2016-09-13 | 2017-02-08 | 玉溪加宝生物能源有限公司 | Biomass granular fuel and processing method thereof |
| CN107267247A (en) * | 2017-07-14 | 2017-10-20 | 铜陵启汇新型能源有限公司 | A kind of biomass barred body fuel with high grain forming rate and preparation method thereof |
| CN107686757A (en) * | 2016-08-05 | 2018-02-13 | 浑源县环保型煤科技发展有限责任公司 | A kind of coal briquette bond |
| CN108641773A (en) * | 2018-04-20 | 2018-10-12 | 湖北和泰生物能源有限公司 | A kind of biomass granule fuel and preparation method thereof |
-
2021
- 2021-09-13 CN CN202111066525.1A patent/CN113801711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104910989A (en) * | 2015-05-12 | 2015-09-16 | 天津神侬环保科技有限公司 | Powder cleaning fuel |
| CN105969473A (en) * | 2016-06-01 | 2016-09-28 | 山东沾化亿元宝农业种植有限公司 | Jerusalem artichoke straw fuel bar and preparing method thereof |
| CN107686757A (en) * | 2016-08-05 | 2018-02-13 | 浑源县环保型煤科技发展有限责任公司 | A kind of coal briquette bond |
| CN106381187A (en) * | 2016-09-13 | 2017-02-08 | 玉溪加宝生物能源有限公司 | Biomass granular fuel and processing method thereof |
| CN107267247A (en) * | 2017-07-14 | 2017-10-20 | 铜陵启汇新型能源有限公司 | A kind of biomass barred body fuel with high grain forming rate and preparation method thereof |
| CN108641773A (en) * | 2018-04-20 | 2018-10-12 | 湖北和泰生物能源有限公司 | A kind of biomass granule fuel and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国农业部: "《农业和农村节能减排十大技术》", 31 October 2017, 中国农业出版社, pages: 24 * |
| 苏绍眉: "《建设项目环境保护 使用手册》", 31 May 1992, 中国环境科学出版社, pages: 47 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854466A (en) * | 2022-04-13 | 2022-08-05 | 圣沐环保机械科技(江苏)有限公司 | Fuel prepared by newly solidifying fly ash and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102352273B (en) | Biomass carbon for iron ore sintering, preparation thereof and application thereof | |
| CN101629083B (en) | Treatment method of wood processing residues and charcoal prepared thereby | |
| CN110257575B (en) | Process for preparing carbide for blast furnace coal injection by treating agricultural and forestry waste based on hydrothermal reaction | |
| KR100877946B1 (en) | Eco-friendly fuel composition and method of manufacturing briquette using the same | |
| CN101307266A (en) | Biomass solid fuel and processing method | |
| CN105001934A (en) | Preparation method for biomass fuel | |
| CN107365601B (en) | A kind of Biomass Gasification ＆ Power Generation method using agriculture and forestry organic waste material | |
| CN102666880A (en) | Method for using biomass in blast furnace | |
| CN107365615A (en) | A kind of preparation method of biological particles charcoal | |
| CN103450962A (en) | Production technique of pure cedar biomass granular fuel | |
| CN101508927B (en) | Process for producing biomass pyrolytic carbon granular fuel | |
| CN111218315A (en) | Biomass briquette fuel | |
| CN101880563A (en) | Bio-coal | |
| CN113801711A (en) | A kind of preparation method of double high carbon | |
| CN102703153A (en) | Preparation method of biomass moulding fuel | |
| CN102585960A (en) | Preparation method of biomass derivative fuel | |
| CN1858165A (en) | Biomass compound fuel and its producing method | |
| CN101935568A (en) | A kind of high temperature biomass micron fuel | |
| CN102994188B (en) | A kind of production method of machine-made charcoal | |
| CN109609137B (en) | Continuous biomass carbonization furnace | |
| CN102786968A (en) | Method for producing machine-made charcoal from Yunnan pipe cone | |
| CN206832029U (en) | The equipment that cement kiln head is burnt using biomass fuel catalysis | |
| CN105969470A (en) | Lightweight carbon fiber biomass briquette fuel and production method thereof | |
| CN102952602A (en) | Processing method of biomass (waste) fuel product | |
| CN1635062A (en) | Molded coal made from garbage and process for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |