CN107502404A - Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature - Google Patents

Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature Download PDF

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Publication number
CN107502404A
CN107502404A CN201710755306.1A CN201710755306A CN107502404A CN 107502404 A CN107502404 A CN 107502404A CN 201710755306 A CN201710755306 A CN 201710755306A CN 107502404 A CN107502404 A CN 107502404A
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China
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powder
straw
coal
compound additive
domestic coke
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张智聪
刘守军
杜文广
杨颂
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Taiyuan Green Coke Energy Co Ltd
Taiyuan University of Technology
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Taiyuan Green Coke Energy Co Ltd
Taiyuan University of Technology
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Priority to CN201710755306.1A priority Critical patent/CN107502404A/en
Publication of CN107502404A publication Critical patent/CN107502404A/en
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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
    • 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
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204—Metals or alloys
    • C10L2200/0236—Group VII metals: Mn, To, Re
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/0204—Metals or alloys
    • C10L2200/024—Group VIII metals: Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
    • C10L2200/029—Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates
    • 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
    • C10L2200/00—Components of fuel compositions
    • C10L2200/04—Organic compounds
    • C10L2200/0461—Fractions defined by their origin
    • C10L2200/0469—Renewables or materials of biological origin
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

A kind of parts by weight composition of powder of straw compound additive for reducing domestic coke ignition temperature is 50~70 parts of powder of straw, 20~30 parts of lime stone, 10~20 parts of bloodstone, 5~10 parts of manganese dioxide.The present invention have can significantly reduce domestic coke ignition temperature, compared with direct burning coal, oxysulfide emission reduction more than 50%, flue dust emission reduction more than 70%.

Description

Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature
Technical field
The present invention relates to a kind of powder of straw compound additive and preparation method and application for reducing domestic coke ignition temperature.
Background technology
Coal burning be China at present so that from now on for quite a long time obtain the energy major way, a large amount of coals it is direct The dust of burning and exhausting, sulfur dioxide, nitrogen oxides etc. cause serious harm to ecological environment, especially atmospheric environment, Cause that China's air environmental pollution is serious, and haze weather takes place frequently.Based on pollution that caused by coal burning present situation, country has successively put into effect a series of Law and regulation, and take strong punitive measures.Although aggravation of the implementation of these regulations to pollution that caused by coal burning degree rises Acted on to certain containment, but still poor very remote of the distance environmental objective to be reached.
In fact, rural household fire coal environmental pollution can not be ignored.According to initial estimate, northern country often burns 1 ton of height Volatilize raw coal, it will discharges more than 2.5 tons of carbon dioxide (carbon emission coefficient 0.67), more than 150 kilograms other stain thing (oxidation of coal rate 0.85).Civilian scattered burning coal consumption is 1.6 hundred million tons within 2014, the 3.8% of national coal consumption is only accounted for, with sulfur dioxide Exemplified by discharge, power plant of China annual emissions are 2,000,000 tons, and civilian scattered burning is then up to 3,200,000 tons, is the 1.6 of power plant emission total amount Times.In addition, a series of problems, such as smoke contamination of civilian scattered burning coal, nitrogen oxides pollution, cinder pollution, is to ecological environment Destroy even more inestimable.However, being influenceed by factors such as region, economy, culture, solve very difficult.Want from root Solve the problems, such as the pollution that caused by coal burning of rural area and samll cities and towns in sheet, provide high-quality, low price for these areas, the alternative fuel of cleaning is to work as Business is anxious.
Domestic coke is based on bunker coal (thermal coal), and is aided with a small amount of coking coal, sulphur-fixing agent, carburant, combustion adjuvant etc., Using existing coke-oven plant's production equipment, pass through clean solid fuel obtained by high-temperature retorting.With blocking good, moderate strength, low Volatilization, low emission sulphur and the advantages that be not easy slagging, without desulfurization equipment, tail gas can meet discharging standards；And easy point Fire, continuous fiery ability is strong, programming rate is fast, firing duration length, is the various preferable fuel of domestic life stove.
Coke is used as domestic fuel, it is necessary to solves the problems, such as coke ignition temperature height, ignition difficulties.At present, metallurgical coke Fiery temperature is 600 DEG C or so, and bituminous coal and anthracitic ignition temperature are respectively 350 DEG C and 500 DEG C.Therefore, it is necessary to by helping The introducing of agent is fired, ignition temperature is down to 400 DEG C or so, to meet civilian furnace igniting requirement.
Patent on combustion-supporting agent for fuel coal is a lot, and as CN90105106.3 discloses a kind of combustion-supporting agent for fuel coal, it contains There are three kinds of boron mud, lime stone, bauxite, white clay, manganese slag, iron oxide, canebreak and sodium carbonate, sodium nitrate, sodium chloride sodium At least one of salt, the combustion adjuvant can obviously improve combustion position, improve stove fire temperature；CN97105154.2 discloses a kind of suitable For the combustion-supporting agent for fuel coal of a variety of coals, mine tailings, manganese dioxide, production potassium bichromate are selected by boron mud, Calcium Carbide Ash, lime stone, iron Waste residue, produce sodium dichromate waste residue, bauxite, sodium hydroxide, sodium carbonate, sodium nitrate, sodium oxide molybdena and canebreak press one Certainty ratio forms, and is well mixed combustion adjuvant by a certain percentage with coal during use；CN201310417513.8 discloses one Kind efficient energy-saving combustion-supporting agent for fuel coal and preparation method thereof, its formula is made up of manganese dioxide and manganese dioxide, can improve the combustion of coal Burn activity and ignition performance, flame temperature.These combustion adjuvants are the products for coal-fired exploitation, mostly use and help what oxygen burnt Technical principle, fire coal is directly added into, promotes coal fully to burn, played a part of combustion-supporting, energization, economize on coal.Due to domestic coke Need the special process by high-temperature retorting, most of component in combustion-supporting agent for fuel coal can fail because of pyrolytic；Therefore, the people The combustion-supporting agent for fuel coal of prior art can not be used with coke.
The content of the invention
It is an object of the invention to provide a kind of powder of straw compound additive that can significantly reduce domestic coke ignition temperature and Its preparation method and application.
Be present significant difference in the present invention and the combustion adjuvant of existing literature report, be mainly manifested in：1) ignition temperature is reduced Mechanism is different.Traditional combustion-supporting agent for fuel coal itself is combustibles, because its ignition temperature is low, is ignited coal by spontaneous combustion, therefore, addition helps Absolute prohibition high-temperature process after combustion agent, otherwise will lose combustion-supporting effect；The combustion-supporting catalytic action for coming from composite oxides of the present invention. First under high-temperature retorting reducing condition, act on coke surface by the catalytic gasification of auxiliary agent and be internally formed carbon defects, into For the firing point of oxidizing fire；In addition, composite assistant under high temperature reducing atmospheres, can form a small amount of microcrystalline, oxygen pole is met Easy firing heat release forms localized hyperthermia's point, so as to the coke that ignites.Powder of straw is as pore creating material, added in domestic coke raw material, Varying number and the micropore of size are formed in high-temperature retorting, increases and improves the microcellular structure of domestic coke, with compound addition Other compositions one in agent work, and reduce the ignition temperature of domestic coke.2) it is different to add the stage.Traditional combustion-supporting agent for fuel coal is more Added before prepared by moulded coal, then blended, cohesive, cold moudling；Or directly enter stove burning after being mixed with scattered coal.This patent helps Agent adds in destructive distillation coal blending, it is blended, make firm by ramming, high-temperature retorting turns into civilian clean coke.
Powder of straw is crushed by stalk and formed, and stalk is the general name of ripe crops cauline leaf (fringe) part, typically refers to jade The remainder of rice, rice, wheat, barley, oat, sorghum or other crops after seed is harvested.China's stalk resource is rich Richness, it is currently the first in the world stalk big country, national stalk total output is up to 8.4 hundred million tons within 2005.Wherein corn stalk, rice straw (rice Grass), wheat straw be still China chief crop straw type.According to statistics, China's straw utilization is used with fertilizer (containing direct returning to farmland) Amount is most, accounts for the 36.6% of stalk resource, next to that being used as fuel and feed, accounts for 23.7% He of stalk resource respectively 22.6%, other such as raw materials, burn and huddle to leave about and account for 17.1%.
Powder of straw is soft in powdered, 0.3~1.0mm of particle diameter, is mainly made up of cellulose, hemicellulose and lignin, General cellulose accounts for 32~45%, and also 20~35% hemicellulose and 6~16% lignin, other compositions are mineral Matter, protein and moisture etc., account for 18~32%.
The present invention first compounds powder of straw and lime stone, bloodstone and manganese dioxide for reducing catching fire for domestic coke Temperature.
To achieve these goals, the technical solution used in the present invention is as follows：
It is a kind of reduce domestic coke ignition temperature powder of straw compound additive, its parts by weight composition for powder of straw 50~ 70 parts, 20~30 parts of lime stone, 10~20 parts of bloodstone, 5~10 parts of manganese dioxide.
Preparation method of the present invention, comprises the following steps：
(1) by stalk, lime stone, bloodstone and manganese dioxide feedstock respectively through thick broken, thin broken to granularity≤3mm.
(2) the additive raw material crushed and powder of straw are weighed respectively, and is mixed, and are stirred.
(3) the compound to stir is dried 1~2 hour under the conditions of 100~150 DEG C, then through dry grinding, makes raw material The mesh of granularity≤100；It is subsequently cooled to normal temperature, as powder of straw compound additive.
The application of powder of straw compound additive of the present invention, comprises the following steps：
By powder of straw compound additive：Mixed coal weight ratio is 2.0~15.0:100, powder of straw compound additive is added Into mixed coal, isolation air is heated to 900~1100 DEG C, 16~24h of continuous heating in gas retort, then by red heat stove Expect to be down to normal temperature through quenching process after coming out of the stove, then it is screened, that is, obtain domestic coke.
The quality index of the mixed coal is：FCd>=50%, Vdaf>=25%, Ad≤ 13.5%, Std＜ 1.0%.
Described screening be down to normal temperature furnace charge screening be 25-80mm granularities.
The primary quality measure of domestic coke is as follows：Caloric value (Qnet,ar) >=5700kcal/kg, ash content (Ad)≤ 22wt%, volatile matter (Vd)≤5wt%, crushing strength (M25) >=75%, ignition temperature (T)≤420 DEG C, than surface (S)=20 ~40m2/g。
Prior art of the present invention is compared, it is that it directly brings and the advantages of necessarily lead to it is as follows with good effect：
In the methods of the invention, used powder of straw compound additive, raw material sources enrich extensively, cheap, It is added directly in mixed coal, domestic coke is made by high-temperature retorting, its ignition temperature can be reduced to from 550~630 DEG C 358~412.7 DEG C, decline temperature amplitude is up to 192~217.3 DEG C, significant effect.
In the methods of the invention, the domestic coke of production, compared with direct burning coal, oxysulfide emission reduction 50% with On, flue dust emission reduction more than 70%, to solving surrounding city life in the countryside coal, improve rural area and city environmental quality, reduce mist Haze weather is of great immediate significance.
Embodiment
Embodiment of the invention is made below and further being illustrated.
Embodiment 1
(1) by raw materials such as broomcorn straw, lime stone, bloodstone and manganese dioxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 20kg crushed, bloodstone 10kg, manganese dioxide 5kg respectively successively, while weigh sorghum Powder of straw (main composition：Cellulose 42.2wt%, hemicellulose 31.6wt%, lignin 7.6wt%, other 18.6wt%) 70kg, mixed, and stirred.
(3) the compound to stir is dried 2 hours under the conditions of 100 DEG C, then through dry grinding, makes raw material granularity≤100 Mesh (0.15mm)；It is subsequently cooled to normal temperature, as powder of straw compound additive (concrete composition：Cellulose 28.1wt%, hemicellulose Plain 21.1wt%, lignin 5.1wt%, CaCO318.2wt%, MnO24.8wt%, CaO5.9wt%, Al2O30.7wt%, SiO28.8wt%, Fe2O36.9wt%, MgO0.5wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal；The quality index of its mixed coal is：Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%；Adhesive index=74, fineness (≤3mm)=73.6%.
(5) powder of straw compound additive is pressed：Mixed coal weight ratio is 15.0:100, the powder of straw compound additive that will be made It is added in mixed coal, air is completely cut off in gas retort and is heated to 1100 DEG C, continuous heating 16h, then red heat furnace charge is come out of the stove Normal temperature is down to by quenching process, then it is screened, obtain the domestic coke that granularity is 25-80mm；Its primary quality measure：Hair Heat (Qnet,ar) 5820kcal/kg, ash content (Ad) 21.7wt%, volatile matter (Vd) 4.2wt%, crushing strength (M25) 75.5%, 358 DEG C of ignition temperature (T), than surface (S) 39.5m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 58%, flue dust emission reduction 80%.
Comparative example：Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1100 DEG C, is continued 16h is heated, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm Jiao Charcoal is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 1 to test result.
Table 1 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 550 -
Add civilian Jiao of compound additive 358 192
Embodiment 2
(1) by raw materials such as rice straw, lime stone, bloodstone and manganese dioxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 22.5kg crushed, bloodstone 13kg, manganese dioxide 6.3kg respectively successively, weigh simultaneously Rice straw powder (main composition：Cellulose 39.6wt%, hemicellulose 34.8wt%, lignin 6.3wt% are other 19.3wt%) 65kg, mixed, and stirred.
(3) the compound to stir is dried 1.8 hours under the conditions of 112.5 DEG C, then through dry grinding, makes raw material granularity ≤ 100 mesh (0.15mm)；It is subsequently cooled to normal temperature, as powder of straw compound additive (concrete composition：Cellulose 24.1wt%, Hemicellulose 21.2wt%, lignin 3.8wt%, CaCO320.1wt%, MnO25.9wt%, CaO5.9wt%, Al2O30.8wt%, SiO28.8wt%, Fe2O38.8wt%, MgO0.6wt%).
(4) as-fired coal not gluing by 30wt% weakly caking coal, 40wt% jet coal, 20wt% gas rich coal and 10wt% Coal, which coordinates, forms mixed coal；Its quality index (wt%)：Vdaf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, bond Index G=40, fineness (≤3mm)=86.5%.
(5) powder of straw compound additive is pressed：Mixed coal weight ratio is 11.8:100, the powder of straw compound additive that will be made It is added in mixed coal, air is completely cut off in gas retort and is heated to 1050 DEG C, continuous heating 18h, then red heat furnace charge is come out of the stove Normal temperature is down to by quenching process, then it is screened, obtain the domestic coke that granularity is 25-80mm；Its primary quality measure：Hair Heat (Qnet,ar) 5851kcal/kg, ash content (Ad) 21.5wt%, volatile matter (Vd) 4.0wt%, crushing strength (M25) 78.2%, 372.4 DEG C of ignition temperature (T), than surface (S) 38.2m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 57%, flue dust emission reduction 79.5%.
Comparative example：Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1050 DEG C, is continued 18h is heated, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm Jiao Charcoal is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 2 to test result.
Table 2 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 570 -
Add civilian Jiao of compound additive 372.4 197.6
Embodiment 3
(1) by raw materials such as wheat stalk, lime stone, bloodstone and manganese dioxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 25kg crushed, bloodstone 15kg, manganese dioxide 7.5kg respectively successively, while weigh small Wheat Straw powder (main composition：Cellulose 43.2wt%, hemicellulose 22.4wt%, lignin 9.5wt% are other 24.9wt%) 60kg, mixed, and stirred.
(3) the compound to stir is dried 1.5 hours under the conditions of 125 DEG C, then through dry grinding, make raw material granularity≤ 100 mesh (0.15mm)；It is subsequently cooled to normal temperature, as powder of straw compound additive (concrete composition：Cellulose 24.1wt%, half Cellulose 12.5wt%, lignin 5.3wt%, CaCO322.2wt%, MnO27.0wt%, CaO7.0wt%, Al2O31.0wt%, SiO210.3wt%, Fe2O310.0wt%, MgO0.7wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal；The quality index of its mixed coal is： Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%；Adhesive index=74, fineness (≤3mm)=73.6%.
(5) powder of straw compound additive is pressed：Mixed coal weight ratio is 8.5:100, the powder of straw compound additive made is added It is added in mixed coal, air is completely cut off in gas retort and is heated to 1000 DEG C, continuous heating 20h, after then red heat furnace charge is come out of the stove Normal temperature is down to through quenching process, then it is screened, obtain the domestic coke that granularity is 25-80mm；Its primary quality measure：Heating Measure (Qnet,ar) 5911kcal/kg, ash content (Ad) 21.1wt%, volatile matter (Vd) 3.6wt%, crushing strength (M25) 81.0%, Fiery 384.3 DEG C of temperature (T), than surface (S) 31.1m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 56%, flue dust emission reduction 79%.
Comparative example：Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 1000 DEG C, is continued 20h is heated, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm Jiao Charcoal is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 3 to test result.
Table 3 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 590 -
Add civilian Jiao of compound additive 384.3 205.7
Embodiment 4
(1) by raw materials such as Barley straw, lime stone, bloodstone and manganese dioxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 27.5kg crushed, bloodstone 18kg, manganese dioxide 8.7kg respectively successively, weigh simultaneously Barley straw powder (main composition：Cellulose 40.7wt%, hemicellulose 23.8wt%, lignin 8.4wt% are other 27.1wt%) 55kg, mixed, and stirred.
(3) the compound to stir is dried 1.3 hours under the conditions of 137.5 DEG C, then through dry grinding, makes raw material granularity ≤ 100 mesh (0.15mm)；It is subsequently cooled to normal temperature, as powder of straw compound additive (concrete composition：Cellulose 20.5wt%, Hemicellulose 12.0wt%, lignin 4.2wt%, CaCO324.0wt%, MnO28.0wt%, CaO7.1wt%, Al2O31.1wt%, SiO210.5wt%, Fe2O311.8wt%, MgO0.8wt%).
(4) as-fired coal not gluing by 30wt% weakly caking coal, 40wt% jet coal, 20wt% gas rich coal and 10wt% Coal, which coordinates, forms mixed coal；Its quality index (wt%)：Vdaf35.0%, Ad13.5%, FCd56.2%, St,d0.84%, bond Index G=40, fineness (≤3mm)=86.5%；
(5) powder of straw compound additive is pressed：Mixed coal weight ratio is 5.3:100, the powder of straw compound additive made is added It is added in mixed coal, air is completely cut off in gas retort and is heated to 950 DEG C, continuous heating 22h, is passed through after then red heat furnace charge is come out of the stove Quenching process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm；Its primary quality measure：Caloric value (Qnet,ar) 6012kcal/kg, ash content (Ad) 20.1wt%, volatile matter (Vd) 3.3wt%, crushing strength (M25) 83.6%, catch fire 398.7 DEG C of temperature (T), than surface (S) 26.3m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 54%, flue dust emission reduction 78.5%.
Comparative example：Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 950 DEG C, is persistently added Hot 22h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 4 to test result.
Table 4 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 610 -
Add civilian Jiao of compound additive 398.7 211.3
Embodiment 5
(1) by raw materials such as maize straw, lime stone, bloodstone and manganese dioxide respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the lime stone 30kg crushed, bloodstone 20kg, manganese dioxide 10kg respectively successively, while weigh corn Powder of straw (main composition：Cellulose 32.9wt%, hemicellulose 19.9wt%, lignin 15.7wt%, other 31.5wt%) 50kg, mixed, and stirred.
(3) the compound to stir is dried 1 hour under the conditions of 150 DEG C, then through dry grinding, makes raw material granularity≤100 Mesh (0.15mm)；It is subsequently cooled to normal temperature, as powder of straw compound additive (concrete composition：Cellulose 15.0wt%, hemicellulose Plain 9.0wt%, lignin 7.1wt%, CaCO326.0wt%, MnO29.1wt%, CaO7.6wt%, Al2O31.2wt%, SiO211.1wt%, Fe2O313.1wt%, MgO0.8wt%).
As-fired coal material by 20wt% jet coal, 15wt% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal Coordinate with 15wt% coking coal and form mixed coal；The quality index of its mixed coal is：Vdaf30.0%, Ad13.5%, FCd60.6%, St,d0.67%；Adhesive index=74, fineness (≤3mm)=73.6%.
(5) powder of straw compound additive is pressed：Mixed coal weight ratio is 2.0:100, the powder of straw compound additive made is added It is added in mixed coal, air is completely cut off in gas retort and is heated to 900 DEG C, continuous heating 24h, is passed through after then red heat furnace charge is come out of the stove Quenching process is down to normal temperature, then screened, obtains the domestic coke that granularity is 25-80mm；Its primary quality measure：Caloric value (Qnet,ar) 6149kcal/kg, ash content (Ad) 18.7wt%, volatile matter (Vd) 3.0wt%, crushing strength (M25) 84.5%, catch fire 412.7 DEG C of temperature (T), than surface (S) 20.3m2/g。
The NS18-2 types 150m that Chuan Zi stoves Co., Ltd produces in Beijing2Burnt progress civilian to gained in civilian reverberatory furnace Combustion test, its pollutant effulent is tested, compared with direct fire coal, oxysulfide emission reduction 52%, flue dust emission reduction 77%.
Comparative example：Any additive is not added in mixed coal, air is completely cut off in gas retort and is heated to 900 DEG C, is persistently added Hot 24h, normal temperature is down to through quenching process after then red heat furnace charge is come out of the stove, then it is screened, gained granularity is 25-80mm coke It is burnt as control.
Civilian to gained burnt and control carries out burning-point test experiments with Jiao respectively in JDRD-5A type determination of ignition point instrument, real It is as shown in table 5 to test result.
Table 5 adds compound additive and is not added with the burning-point contrast of compound additive coke
Test group Burning-point DEG C Decline temperature DEG C
Control is burnt 630 -
Add civilian Jiao of compound additive 412.7 217.3
After can be seen that addition powder of straw compound additive by the experimental result of embodiment 1~5, significantly reduce civilian The burning-point of coke, it ensure that domestic coke as a kind of application of fuel.

Claims (6)

1. a kind of powder of straw compound additive for reducing domestic coke ignition temperature, it is characterised in that parts by weight composition is powder of straw 50~70 parts, 20~30 parts of lime stone, 10~20 parts of bloodstone, 5~10 parts of manganese dioxide.
2. a kind of preparation method of powder of straw compound additive for reducing domestic coke ignition temperature as claimed in claim 1, It is characterized in that comprise the following steps：
(1) by stalk, lime stone, bloodstone and manganese dioxide feedstock respectively through thick broken, thin broken to granularity≤3mm；
(2) the additive raw material crushed and powder of straw are weighed respectively, and is mixed, and are stirred；
(3) the compound to stir is dried 1~2 hour under the conditions of 100~150 DEG C, then through dry grinding, makes raw material granularity ≤ 100 mesh；It is subsequently cooled to normal temperature, as powder of straw compound additive.
3. a kind of application of powder of straw compound additive for reducing domestic coke ignition temperature as claimed in claim 1, it is special Sign is to comprise the following steps：
By powder of straw compound additive：Mixed coal weight ratio is 2.0~15.0:100, powder of straw compound additive is added to and matched somebody with somebody Close in coal, air is completely cut off in gas retort and is heated to 900~1100 DEG C, 16~24h of continuous heating, then red heat furnace charge is come out of the stove Normal temperature is down to by quenching process, then it is screened, that is, obtain domestic coke.
4. a kind of application of powder of straw compound additive for reducing domestic coke ignition temperature as claimed in claim 3, it is special Sign is that the quality index of the mixed coal is：FCd>=50%, Vdaf>=25%, Ad≤ 13.5%, Std＜ 1.0%.
5. a kind of application of powder of straw compound additive for reducing domestic coke ignition temperature as claimed in claim 1, it is special Sign is that described screening is that to be down to the furnace charge screening of normal temperature be 25-80mm granularities.
6. using the domestic coke prepared as described in claim any one of 3-6, it is characterised in that the prevailing quality of domestic coke Index is as follows：Caloric value >=5700kcal/kg, ash content≤22wt%, volatile matter≤5wt%, crushing strength >=75%, ignition temperature ≤ 420 DEG C, than surface=20~40m2/g。
CN201710755306.1A 2017-08-29 2017-08-29 Reduce powder of straw compound additive and preparation method and the application of domestic coke ignition temperature Pending CN107502404A (en)

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Application publication date: 20171222