CN107523371A - Reduce stalk flour additive agent and preparation method and the application of domestic coke ignition temperature - Google Patents
Reduce stalk flour additive agent and preparation method and the application of domestic coke ignition temperature Download PDFInfo
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- CN107523371A CN107523371A CN201710755335.8A CN201710755335A CN107523371A CN 107523371 A CN107523371 A CN 107523371A CN 201710755335 A CN201710755335 A CN 201710755335A CN 107523371 A CN107523371 A CN 107523371A
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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
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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
- C10L10/00—Use of additives to fuels or fires for particular purposes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
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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
- 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
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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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/06—Heat exchange, direct or indirect
-
- 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
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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
-
- 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 technical indicator for the stalk flour additive agent for reducing domestic coke ignition temperature is the mesh of stalk Powder Particle Size≤100, moisture is less than 10wt%, mainly include cellulose, hemicellulose, lignin and mineral matter, its butt composition is cellulose 32~45%, hemicellulose 20~35%, lignin 6~16%, mineral matter 18~32%.The present invention has stalk flour additive agent, and raw material sources are rich, and cheap, ignition temperature fall is up to 192~216 DEG C, compared with direct burning coal, oxysulfide emission reduction more than 50%, and flue dust emission reduction more than 70%.
Description
Technical field
The present invention relates to a kind of stalk flour additive agent 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 zinc oxide and manganese dioxide, can improve burning of coal
Activity and ignition performance, flame temperature.These combustion adjuvants are the products for coal-fired exploitation, mostly using the skill for helping oxygen to burn
Art principle, is directly added into fire coal, promotes coal fully to burn, and plays a part of combustion-supporting, energization, economizes on coal.Because domestic coke needs
To pass through the special process of high-temperature retorting, most of component in combustion-supporting agent for fuel coal can fail because of pyrolytic；Therefore, it is civilian
Coke can not use the combustion-supporting agent for fuel coal of prior art.
The content of the invention
It is an object of the invention to provide a kind of stalk flour additive agent that can significantly reduce domestic coke ignition temperature and its system
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 powder of straw that comes from of the present invention is a kind of pore creating material, is added
Add in domestic coke raw material, varying number and the micropore of size are formed in high-temperature retorting, increases and improves domestic coke
Microcellular structure, reduce the ignition temperature of domestic coke.2) it is different to add the stage.Traditional combustion-supporting agent for fuel coal is more to be added before prepared by moulded coal
Enter, then blended, cohesive, cold moudling；Or directly enter stove burning after being mixed with scattered coal.This patent auxiliary agent is in destructive distillation coal blending
Add, 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%.
Soft powder of straw is in powdered, 0.3~1.0mm of particle diameter, mainly including cellulose, hemicellulose, lignin, mineral
Matter and water, initial condition are divided into 13~45%.Powder of straw butt composition includes：Cellulose 32~45%, hemicellulose 20~
35%, lignin 6~16%, mineral matter 18~32%.
Powder of straw is used for the ignition temperature for reducing domestic coke by the present invention first.
Stalk flour additive agent of the present invention, it is characterised in that the mesh (0.15mm) of stalk Powder Particle Size≤100, moisture is less than
10wt%, mainly including cellulose, hemicellulose, lignin and mineral matter, its butt composition is cellulose 32~45%, and half is fine
Dimension element 20~35%, lignin 6~16%, mineral matter 18~32%.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of stalk flour additive agent for reducing domestic coke ignition temperature, its preparation method comprise the following steps：
(1) stalk is dried 1~2 hour through thick broken, thin broken to granularity≤3mm under the conditions of 100~150 DEG C.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent are subsequently cooled to.
The application of stalk flour additive agent of the present invention, comprises the following steps：
Press stalk flour additive agent：Mixed coal weight ratio is 5.0~20.0:100, stalk flour additive agent is added to mixed coal
In, isolation air is heated to 900~1100 DEG C in gas retort, 16~24h of continuous heating, is passed through after then red heat furnace charge is come out of the stove
Quenching process is down to normal temperature, then screened, that is, obtains 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) >=6000kcal/kg, ash content (Ad)≤
20wt%, 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 stalk flour additive agent, raw material sources enrich extensively, cheap, directly
Added in mixed coal, domestic coke is made by high-temperature retorting, its ignition temperature can be reduced to 353 from 545~625 DEG C~
409 DEG C, decline temperature amplitude is up to 192~216 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) 200kg broomcorn straws (main composition is weighed：Cellulose 36.7wt%, hemicellulose 27.5wt%, lignin
6.6wt%, mineral matter 16.0wt%, H2O13.0wt%), dried through thick broken, thin broken to granularity≤3mm under the conditions of 100 DEG C
It is dry 2 hours.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent (concrete composition are subsequently cooled to：Cellulose 38.4wt%, hemicellulose
28.7wt%, lignin 6.9wt%, SiO210.0wt%, CaO6.7wt%, H2O9.1wt%).
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) stalk flour additive agent is pressed：Mixed coal weight ratio is 20.0:100, the stalk flour additive agent made is added to and matched somebody with somebody
Close in coal, air is completely cut off in gas retort and is heated to 1100 DEG C, continuous heating 16h, through quenching after then red heat furnace charge is come out of the stove
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) 6048kcal/kg, ash content (Ad) 18.7wt%, volatile matter (Vd) 4.3wt%, crushing strength (M25) 75.3%,
Fiery 353 DEG C of temperature (T), than surface (S) 38.9m2/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 77%.
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 stalk flour additive agent and is not added with the burning-point contrast of stalk flour additive agent coke
Embodiment 2
(1) 162.5kg rice straws (main composition is weighed：Cellulose 31.3wt%, hemicellulose 27.5wt%, it is wooden
Plain 5.0wt%, mineral matter 15.1wt%, H2O21.0wt%), through thick broken, thin broken to granularity≤3mm, and in 112.5 DEG C of conditions
Lower drying 1.8 hours.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent (concrete composition are subsequently cooled to：Cellulose 35.9wt%, hemicellulose
31.6wt%, lignin 5.7wt%, SiO210.4wt%, CaO6.9wt%, H2O9.3wt%).
(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) stalk flour additive agent is pressed：Mixed coal weight ratio is 16.3:100, the stalk flour additive agent made is added to and matched somebody with somebody
Close in coal, air is completely cut off in gas retort and is heated to 1050 DEG C, continuous heating 18h, through quenching after then red heat furnace charge is come out of the stove
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) 6068kcal/kg, ash content (Ad) 18.6wt%, volatile matter (Vd) 4.1wt%, crushing strength (M25) 77.3%,
Fiery 362.8 DEG C of temperature (T), than surface (S) 36.2m2/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 55%, flue dust emission reduction 76.5%.
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 stalk flour additive agent and is not added with the burning-point contrast of stalk flour additive agent coke
| Test group | Burning-point DEG C | Decline temperature DEG C |
| Control is burnt | 565 | - |
| Add civilian Jiao of stalk flour additive agent | 362.8 | 202.2 |
Embodiment 3
(1) 125kg wheat stalks (main composition is weighed：Cellulose 30.7wt%, hemicellulose 15.9wt%, lignin
6.7wt%, mineral matter 17.5wt%, H2O29.0wt%), dried through thick broken, thin broken to granularity≤3mm under the conditions of 125 DEG C
It is dry 1.5 hours.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent (concrete composition are subsequently cooled to：Cellulose 39.1wt%, hemicellulose
20.3wt%, lignin 8.6wt%, SiO213.4wt%, CaO8.9wt%, H2O9.4wt%).
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) stalk flour additive agent is pressed：Mixed coal weight ratio is 12.5:100, the stalk flour additive agent made is added to and matched somebody with somebody
Close in coal, air is completely cut off in gas retort and is heated to 1000 DEG C, continuous heating 20h, through quenching after then red heat furnace charge is come out of the stove
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) 6053kcal/kg, ash content (Ad) 19.2wt%, volatile matter (Vd) 3.7wt%, crushing strength (M25) 80.4%,
Fiery 379.1 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 54%, flue dust emission reduction 76%.
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 stalk flour additive agent and is not added with the burning-point contrast of stalk flour additive agent coke
| Test group | Burning-point DEG C | Decline temperature DEG C |
| Control is burnt | 585 | - |
| Add civilian Jiao of stalk flour additive agent | 379.1 | 205.9 |
Embodiment 4
(1) 87.5kg Barley straws (main composition is weighed：Cellulose 25.6wt%, hemicellulose 15.0wt%, lignin
5.3wt%, mineral matter 16.9wt%, H2O37.0wt%), through thick broken, thin broken to granularity≤3mm, and under the conditions of 137.5 DEG C
Drying 1.3 hours.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent (concrete composition are subsequently cooled to：Cellulose 36.8wt%, hemicellulose
21.5wt%, lignin 7.6wt%, SiO214.5wt%, CaO9.7wt%, H2O9.6wt%).
(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) stalk flour additive agent is pressed：Mixed coal weight ratio is 8.8:100, the stalk flour additive agent made is added to cooperation
In coal, isolation air is heated to 950 DEG C, continuous heating 22h in gas retort, through quenching process after then red heat furnace charge is come out of the stove
Normal temperature is down to, then it is screened, obtain the domestic coke that granularity is 25-80mm；Its primary quality measure：Caloric value (Qnet,ar)
6093kcal/kg, ash content (Ad) 19.0wt%, volatile matter (Vd) 3.4wt%, crushing strength (M25) 82.1%, ignition temperature
(T) 393.7 DEG C, than surface (S) 26.2m2/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 52%, flue dust emission reduction 75.5%.
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 stalk flour additive agent and is not added with the burning-point contrast of stalk flour additive agent coke
| Test group | Burning-point DEG C | Decline temperature DEG C |
| Control is burnt | 605 | - |
| Add civilian Jiao of stalk flour additive agent | 393.7 | 211.3 |
Embodiment 5
(1) 50kg maize straws (main composition is weighed：Cellulose 18.1wt%, hemicellulose 10.9wt%, lignin
8.6wt%, mineral matter 17.1wt%, H2O45.0wt%), dried through thick broken, thin broken to granularity≤3mm under the conditions of 150 DEG C
It is dry 1 hour.
(2), again through dry grinding, the mesh (0.15mm) of raw material granularity≤100 is made.
(3) normal temperature, as stalk flour additive agent (concrete composition are subsequently cooled to：Cellulose 29.7wt%, hemicellulose
17.9wt%, lignin 14.2wt%, SiO216.8wt%, CaO11.2wt%, H2O9.8wt%).
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) stalk flour additive agent is pressed：Mixed coal weight ratio is 5.0:100, the stalk flour additive agent made is added to cooperation
In coal, isolation air is heated to 900 DEG C, continuous heating 24h in gas retort, through quenching process after then red heat furnace charge is come out of the stove
Normal temperature is down to, then it is screened, obtain the domestic coke that granularity is 25-80mm；Its primary quality measure：Caloric value (Qnet,ar)
6142kcal/kg, ash content (Ad) 18.7wt%, volatile matter (Vd) 3.1wt%, crushing strength (M25) 84.5%, ignition temperature
(T) 409 DEG C, than surface (S) 20.1m2/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 51%, flue dust emission reduction 75%.
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 stalk flour additive agent and is not added with the burning-point contrast of stalk flour additive agent coke
| Test group | Burning-point DEG C | Decline temperature DEG C |
| Control is burnt | 625 | - |
| Add civilian Jiao of stalk flour additive agent | 409 | 216 |
After can be seen that addition stalk flour additive agent by the experimental result of embodiment 1~5, domestic coke is significantly reduced
Burning-point so that domestic coke is more easy to catch fire, and ensure that domestic coke as a kind of application of fuel.
Claims (6)
- A kind of 1. stalk flour additive agent for reducing domestic coke ignition temperature, it is characterised in that it is characterized in that stalk Powder Particle Size≤ 100 mesh, moisture are less than 10wt%, and mainly including cellulose, hemicellulose, lignin and mineral matter, its butt composition is cellulose 32~45%, hemicellulose 20~35%, lignin 6~16%, mineral matter 18~32%.
- 2. a kind of preparation method of stalk flour additive agent for reducing domestic coke ignition temperature as claimed in claim 1, it is special Sign is to comprise the following steps：(1) stalk is dried 1~2 hour through thick broken, thin broken to granularity≤3mm under the conditions of 100~150 DEG C；(2), again through dry grinding, the mesh of raw material granularity≤100 is made；(3) normal temperature, as stalk flour additive agent are subsequently cooled to.
- 3. a kind of application of stalk flour additive agent for reducing domestic coke ignition temperature as claimed in claim 1, its feature exist In comprising the following steps：Press stalk flour additive agent：Mixed coal weight ratio is 5.0~20.0:100, stalk flour additive agent is added in mixed coal, Completely cut off air in gas retort and be heated to 900~1100 DEG C, 16~24h of continuous heating, through putting out after then red heat furnace charge is come out of the stove Burnt process is down to normal temperature, then screened, that is, obtains domestic coke.
- 4. a kind of application of stalk flour additive agent for reducing domestic coke ignition temperature as claimed in claim 3, its feature exist It is in the quality index of the mixed coal：FCd>=50%, Vdaf>=25%, Ad≤ 13.5%, Std＜ 1.0%.
- 5. a kind of application of stalk flour additive agent for reducing domestic coke ignition temperature as claimed in claim 4, its feature exist In described screening be down to normal temperature furnace charge screening be 25-80mm granularities.
- 6. using the domestic coke prepared as described in claim any one of 3-5, it is characterised in that the prevailing quality of domestic coke Index is as follows：Caloric value >=6000kcal/kg, ash content≤20wt%, volatile matter≤5wt%, crushing strength >=75%, ignition temperature ≤ 420 DEG C, than surface=20~40m2/g。
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Application publication date: 20171229 |