CN104987909A - Method for producing low-sulfur briquette by utilizing abandoned biomass of saline-alkali soil - Google Patents
Method for producing low-sulfur briquette by utilizing abandoned biomass of saline-alkali soil Download PDFInfo
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- CN104987909A CN104987909A CN201510485238.2A CN201510485238A CN104987909A CN 104987909 A CN104987909 A CN 104987909A CN 201510485238 A CN201510485238 A CN 201510485238A CN 104987909 A CN104987909 A CN 104987909A
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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
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Abstract
The invention discloses a production method of clean biomass briquette. The production method comprises the following steps of: crushing raw coal and biomass materials into a certain particle size range; adding the crushed biomass raw materials to an alkali solution with a certain concentration, heating the crushed biomass materials and the alkali solution for a certain time, using the mixed solution obtained after treatment as binder; mixing calcium carbonate and pyroligneous acid according to the mass ratio of the calcium carbonate to the pyroligneous acid being 0.5-8:100, and reacting the calcium carbonate and the pyroligneous acid at the temperature of 20-100 DEG C so as to prepare a desulfurizing and denitrfying agent, wherein the reaction time is 0.5-10h; and uniformly mixing the binder, the desulfurizing agent and the crushed raw coal according to a certain proportion so as to obtain a mixture, performing pressing forming on the material mixture of the under a certain forming pressure, demouding the formed briquette, and drying the demoulded briquette so as to obtain biomass briquette products. The production technology adopted by the method disclosed by the invention is feasible and is simple to operate, waste is not generated, the combustion efficiency of the briquette is improved, and besides the pollutant discharge is reduced. Through effective combination of the biomass and the coal raw materials, the reclamation of biomass type solid waste and the high-efficiency cleaning and utilizing of coal are synchronously realized.
Description
Technical field
The present invention relates to Filter Tuber For Clean Coal application and biomass as resources field, particularly a kind of saltings abandoned biomass that utilizes is for the method for raw material production low-sulfur clean type coal.
Background technology
The energy is the key element involved the interests of the state and the people, and sufficient power supply could support the Sustainable development of economic society.The Economic development that the resources characteristic of " rich coal, weak breath, oil starvation " determines China highly must rely on coal resources, the proportion of current coal shared by the primary energy source of China, up to 75%, will still need to use coal resources in a large number in quite long one period in future.A large amount of consumption of coal cause many serious environmental problems, and the serious atmospheric pollution based on haze has coverd with one deck shade to Sustainable development.For tackling severe topsoil situation, various places strengthen applying of desulfurization and dedusting technology and central heating technology energetically, and particularly large-scale coal-burning power plant is provided with desulfurization and dust removal equipment.But the effect that end treatment can play is very limited.On the one hand, because the upgrading increasing desulfurization and dust removal equipment and boiler significantly can increase cost, the application of these technology is only confined to large-scale state-owned enterprise, and in the small scall coal-fired boiler of a large amount of medium-sized and small enterprises, be difficult to effective implementation.On the other hand, a large amount of coal-burning utilities transfers to central and west regions from eastern region, and the pollution that fire coal causes is transferred instead of really eliminates.Therefore, the pollution that elimination coal causes must improve Coal Quality from source, effectively reduces the discharge of oxysulfide, oxynitride and flue dust while improving coal utilization efficiency.
Development and application clean coal is the effective measure improving coal combustion efficiency and solve coal pollution.In practice, calcium carbonate, unslaked lime and white lime are extensively added in coal, and as sweetening agent, wherein applying maximum is calcium oxide.First calcium carbonate will decompose generation calcium oxide ability sulfur dioxide absorption, and due to the decomposition temperature height of calcium carbonate and the restriction of sulfurous gas rate of diffusion, the desulfuration efficiency of calcium carbonate only has about 20-40%.Can generate micro-sky on calcium sulfate blocking calcium oxide surface after absorbent lime sulfurous gas, may sinter at the hot conditions next section calcium oxide of 1200 DEG C, these phenomenons cause calcium oxide desulfuration efficiency to be in actual use also restricted.
Ye Shi large agricultural country of China, agriculture production produces large number of biological matter class solid waste every year, result in a series of problem.Before and after 2010, some local directly crop straw burnings create serious atmosphere polluting problem.In recent years, various places all implement the strict policy of forbidding burning straw, but how effectively process is disposed stalk solid waste and is remained a pendent difficult problem, abandoning of a large amount of stalk not only takies a large amount of cultivated land resources with landfill, and may cause serious underground water and surface water pollution.For the feature of China's stalk resource, again excavate stalk as the value of fuel, there is huge theory and realistic meaning.Utilize biomass and coal cofiring to generate electricity also to be the effective way of biomass as resources.But densified straw is lower, energy density is also lower, its collect and, transport and storage can bring larger cost.In addition, the mixed firing using traditional coal firing boiler directly to carry out stalk and coal is easy to cause equipment to block, and causes new environmental problem.
Along with the quick propelling of urbanization, create a large amount of afforestation rubbish.The saltings of Tianjin municipalization area up to 49.3 hectares, grows the plant of a large amount of Salt And Alkali Tolerance.Have miscellaneous calciphilous plant in these saline alkali tolerant plants, they absorb a large amount of calcium ion, are combined calcium salts such as forming calcium phosphate, calcium sulfate, calcium carbonate, lime acetate and caoxalate with mineral acid or organic acid.Such as, saltings growth white Du (
euonymus maackii), weeping willow (
salix babylonica), Euonymus japonicus (
euonymus japonicus), torch tree (
rhus typhina), Cortex Populi Tomentosae (
populus tomentosa), peach (
prunus davidiana) and cercis (
cercis chinensis) all containing more calcium salt.Along with large-scale development and the Urban Greening of Binhai New District, these plants will form a large amount of afforestation rubbish.These being contained the plant residue enriching calcium salt adds in moulded coal, can play the effect of binding agent and sweetening agent simultaneously, not only can realize minimizing and the resource utilization of biomass solid wastes, can also improve the spatter property of coal burning simultaneously.
Summary of the invention
The object of the invention is to solve coal utilization efficiency low and easily produce environmental pollution, overcome the shortcoming that traditional briquette production technical matters is complicated, difficulty of processing is large and cost is high, there is provided a kind of with the saltings abandoned biomass of high calcium-containing and coal for raw material, the method of production clean biometric matter moulded coal, the high-efficiency cleaning of the resource utilization and coal that simultaneously realize biomass class solid waste utilizes, and comprises the following steps:
(1) coal is crushed to certain particle size scope, and biological material is crushed to certain particle size scope.Joined in certain density alkaline solution by biomass material after pulverizing, be heated to certain temperature and keep the regular hour, the mixed solution formed after process is used as binding agent.
Described biomass are lignocellulose-like biomass materials that are unedible, that form primarily of Mierocrystalline cellulose, hemicellulose and xylogen, preferably biomass mainly comprise afforestation rubbish, the biomass class solid waste that the generation such as residue produced in biomass straw and seed hull, preparation of biodiesel is large.Further preferably, biomass be mainly used in saltings growth white Du (
euonymus maackii), weeping willow (
salix babylonica), Euonymus japonicus (
euonymus japonicus), torch tree (
rhus typhina), Cortex Populi Tomentosae (
populus tomentosa), peach (
prunus davidiana) and cercis (
cercis chinensis) waste all containing more calcium salt.Coal comprise through sorting raw coal and there is coal slime and the coal gangue of certain calorific value.Alkaline solution is certain density sodium hydroxide solution mainly.Preferably, described biomass material and raw coal grinding particle size are less than 10mm, and further preferably, granularity is less than 5mm, most preferably is and is less than 1mm.
(2) mixed according to mass ratio 0.5-8:100 with wood vinegar by calcium carbonate, under the temperature condition of 20-100 DEG C, sweetening agent is made in reaction, and the reaction times is 0.5-10h.
Described calcium carbonate is be less than the particle of 1mm or pulverous calcium carbonate product through crushing and screening granularity, and described wood vinegar is the byproduct of wood distillation processing, and mainly contain the organic acid compositions such as acetic acid, acidity is at 0.1-1.5 mole often liter.Preferably, temperature of reaction 20-50 DEG C, the reaction times is 2-4h.
(3) mix obtaining binding agent, sweetening agent and passing through the raw coal pulverized according to a certain percentage, utilize grinding tool by extrusion forming under certain for above-mentioned raw mixture forming pressure, after the moulded coal demoulding after shaping, drying, namely obtain biomass type product of coal.
Preferably, described binding agent and the mass ratio of raw coal are 5-80:100.Preferably, described mixed solution and the mass ratio of raw coal are 20-40:100.Described calcium sulfur ratio refers to the ratio of the calcium of solubilised state in sweetening agent and the content of element sulphur in coal.Preferably, described sweetening agent and the calcium sulfur ratio of coal are 1.0-3:1.Further preferably, calcium sulfur ratio is within the scope of 1.7-2.2:1.Preferably, described forming pressure 8-35Mpa, more preferably 10-20Mpa.
Advantage of the present invention and beneficial effect are: with discarded biological material for raw material production binding agent, with wood vinegar and calcium carbonate for sweetening agent prepared by raw material, final production goes out clean biomass coal, production technique is feasible, simple to operate, produce without waste, decreases disposal of pollutants while improve the efficiency of combustion of moulded coal.By the efficient combination of biomass and coal feedstock, the high-efficiency cleaning of the resource utilization and coal that synchronously achieve biomass class solid waste utilizes.
Embodiment
The present invention is described in further detail by following examples, but the present embodiment the technology contents that describes be illustrative, instead of determinate, protection scope of the present invention should do not limited to according to this.
Embodiment 1:
A production method for clean biometric matter moulded coal, comprises the following steps:
Biomass employing Cortex Populi Tomentosae (
populus tomentosa), be crushed to granularity and be less than 1mm.The coal that raw coal adopts Datong District to produce, is crushed to granularity and is less than 1mm.The sodium hydroxide solution of the timber through pulverizing and massfraction 2% being mixed according to mass ratio 4:100, being heated to 90 DEG C of reaction 2h, obtaining binding agent.Be less than the wood vinegar that the particle of 1mm or pulverous calcium carbonate and acidity are 1.2 moles often liter mix through crushing and screening granularity according to mass ratio 5:100, under the temperature condition of 25 DEG C, react 3h make sweetening agent.Binding agent and raw coal is kept to be 30:100 according to mass ratio, the calcium sulfur ratio of sweetening agent and coal is 1.2:1, by binding agent, sweetening agent and coal dust mixing and stirring, compression moulding under the forming pressure of 18Mpa, makes biomass type product of coal.The briquette prod prepared is tested by analysis, and thermal value is 22.1MJ/kg, ultimate compression strength 40N/cm
2, sulfur-fixing rate 63%, nitrogen oxide removal efficiency is 39%, flue dust clearance 75%.
Embodiment 2:
A production method for clean biometric matter moulded coal, comprises the following steps:
Biomass employing Cortex Populi Tomentosae cercis (
cercis chinensis), be crushed to granularity and be less than 1mm.The coal that raw coal adopts Datong District to produce, is crushed to granularity and is less than 1mm.The sodium hydroxide solution of the timber through pulverizing and massfraction 1.5% being mixed according to mass ratio 4:100, being heated to 90 DEG C of reaction 1.5h, obtaining binding agent.Be less than the wood vinegar that the particle of 0.5mm or pulverous calcium carbonate and acidity are 0.5 mole often liter mix through crushing and screening granularity according to mass ratio 2:100, under the temperature condition of 50 DEG C, react 1h make sweetening agent.Keep binding agent and raw coal to be 30:100 according to mass ratio, sweetening agent and coal are according to calcium sulfur ratio 1.2:1, and by binding agent, sweetening agent and coal dust mixing and stirring, compression moulding under the forming pressure of 20Mpa, makes biomass type product of coal.The briquette prod prepared is tested by analysis, and thermal value is 24.1MJ/kg, ultimate compression strength 37N/cm
2, sulfur-fixing rate 59%, nitrogen oxide removal efficiency is 40%, flue dust clearance 72%.
Embodiment 3:
A production method for clean biometric matter moulded coal, comprises the following steps:
Biomass employing weeping willow (
salix babylonica), be crushed to granularity and be less than 1mm.The coal that raw coal adopts Datong District to produce, is crushed to granularity and is less than 1mm.The sodium hydroxide solution of the timber through pulverizing and massfraction 2.5% being mixed according to mass ratio 4:100, being heated to 90 DEG C of reaction 2h, obtaining binding agent.Be less than the wood vinegar that the particle of 1.8mm or pulverous calcium carbonate and acidity are 1.0 moles often liter mix through crushing and screening granularity according to mass ratio 3:100, under the temperature condition of 25 DEG C, react 3h make sweetening agent.Keep binding agent and raw coal to be 30:100 according to mass ratio, binding agent, sweetening agent and coal dust, according to calcium sulfur ratio 1.3:1, mix by sweetening agent and coal, and biomass type product of coal is made in compression moulding under the forming pressure of 20Mpa.The briquette prod prepared is tested by analysis, and thermal value is 23.5MJ/kg, ultimate compression strength 38N/cm
2, sulfur-fixing rate 82%, nitrogen oxide removal efficiency is 42%, flue dust clearance 72%.
Claims (1)
1. a production method for clean biometric matter moulded coal, is characterized in that comprising the following steps:
1) raw coal is crushed to certain particle size scope, and biological material is crushed to certain particle size scope; Joined in certain density alkaline solution by biomass material after pulverizing, be heated to certain temperature and keep the regular hour, the mixed solution formed after process is used as binding agent;
2) mixed according to mass ratio 0.5-8:100 with wood vinegar by calcium carbonate, under the temperature condition of 20-100 DEG C, desulfurization denitrification agent is made in reaction, and the reaction times is 0.5-10h;
3) mix obtaining binding agent, sweetening agent and passing through the raw coal pulverized according to a certain percentage, utilize grinding tool by extrusion forming under certain for above-mentioned raw mixture forming pressure, after the moulded coal demoulding after shaping, drying, namely obtain biomass type product of coal.
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| CN201510485238.2A CN104987909A (en) | 2015-08-10 | 2015-08-10 | Method for producing low-sulfur briquette by utilizing abandoned biomass of saline-alkali soil |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674317A (en) * | 2015-12-21 | 2016-06-15 | 宁波高新区世代能源科技有限公司 | Efficient energy-saving environment-friendly energy saving and emission reducing complete equipment with desulfuration, denitration and dust removal functions |
| CN105802687A (en) * | 2016-02-03 | 2016-07-27 | 山东佳星环保科技有限公司 | Preparation method for compound type biomass briquette coal binder |
| CN106701246A (en) * | 2017-03-16 | 2017-05-24 | 南开大学 | Method for producing clean biomass briquettes |
| CN106947565A (en) * | 2017-03-16 | 2017-07-14 | 南开大学 | A kind of clean type coal fuel and its production method |
| CN108148645A (en) * | 2017-12-19 | 2018-06-12 | 中国矿业大学 | A kind of fresh straw makees the clean moulded coal preparation method of binding agent |
| CN109499301A (en) * | 2018-11-29 | 2019-03-22 | 北京工业大学 | A kind of method that rice hull ash cooperates with progress dry-process cement rotary kiln dore furnace denitrating flue gas with coal dust |
| CN110028995A (en) * | 2019-04-25 | 2019-07-19 | 梅丽中 | A kind of alkaline biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056879A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of biological particles and special equipment for incineration disposal organic liquid waste |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674317A (en) * | 2015-12-21 | 2016-06-15 | 宁波高新区世代能源科技有限公司 | Efficient energy-saving environment-friendly energy saving and emission reducing complete equipment with desulfuration, denitration and dust removal functions |
| CN105802687A (en) * | 2016-02-03 | 2016-07-27 | 山东佳星环保科技有限公司 | Preparation method for compound type biomass briquette coal binder |
| CN106701246A (en) * | 2017-03-16 | 2017-05-24 | 南开大学 | Method for producing clean biomass briquettes |
| CN106947565A (en) * | 2017-03-16 | 2017-07-14 | 南开大学 | A kind of clean type coal fuel and its production method |
| CN108148645A (en) * | 2017-12-19 | 2018-06-12 | 中国矿业大学 | A kind of fresh straw makees the clean moulded coal preparation method of binding agent |
| CN109499301A (en) * | 2018-11-29 | 2019-03-22 | 北京工业大学 | A kind of method that rice hull ash cooperates with progress dry-process cement rotary kiln dore furnace denitrating flue gas with coal dust |
| CN110028995A (en) * | 2019-04-25 | 2019-07-19 | 梅丽中 | A kind of alkaline biological particles and special equipment for incineration disposal organic liquid waste |
| CN110056879A (en) * | 2019-04-25 | 2019-07-26 | 梅丽中 | A kind of biological particles and special equipment for incineration disposal organic liquid waste |
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