CN107418606A - Reduce charcoal powder compound additive and preparation method and the application of domestic coke ignition temperature - Google Patents
Reduce charcoal powder compound additive and preparation method and the application of domestic coke ignition temperature Download PDFInfo
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- CN107418606A CN107418606A CN201710754976.1A CN201710754976A CN107418606A CN 107418606 A CN107418606 A CN 107418606A CN 201710754976 A CN201710754976 A CN 201710754976A CN 107418606 A CN107418606 A CN 107418606A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing 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
- 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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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
A kind of charcoal powder compound additive parts by weight composition for reducing domestic coke ignition temperature is 50~70 parts of charcoal powder, 10~25 parts of potassium feldspar, 10~20 parts of manganese ore, 5~10 parts of vanadic anhydride.The raw material sources of the present invention enrich extensively, it is cheap, ignition temperature can be reduced to 397~447 DEG C from 550~630 DEG C, decline temperature amplitude is up to 153~183 DEG C, compared with direct burning coal, oxysulfide emission reduction more than 50%, flue dust emission reduction more than 70%, to solving surrounding city life in the countryside coal, improve rural area and city environmental quality, reduce haze weather and be of great immediate significance.
Description
Technical field
The present invention relates to a kind of charcoal powder 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 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 charcoal powder 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.Charcoal powder is as reducing agent and activator, added to domestic coke
In raw material, the formation of carbon defects and microcrystalline is promoted in high-temperature retorting, together with other compositions in compound additive
Effect, 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,
Then blended, cohesive, cold moudling；Or directly enter stove burning after being mixed with scattered coal.This patent auxiliary agent adds in destructive distillation coal blending
Enter, it is blended, make firm by ramming, high-temperature retorting turns into civilian clean coke.
Charcoal powder is to pass through imperfect combustion by agricultural crop straw, forestry residue (containing sawdust), or in isolation air
Under conditions of be pyrolyzed, the dark brown or black porosu solid fuel remained, then formed through crushing and processing.Main component is carbon
Element, ash content is very low, and its content depends primarily on the final temperature of charing.Charcoal powder belongs to hydrophobic substance, and content of ashes exists
Within 6%, hole accounts for charcoal powder volume more than 7%.The reducing power of charcoal powder is more than coke, there is substantial amounts of micropore and transition
Hole, it is not only had higher specific surface area, and there will be good absorption property after tar material is excluded in hole.Charcoal powder
Quality index be：FCd＞ 64%, Vd=10%~30%, Ad＜ 6%.
The present invention first by charcoal powder and potassium feldspar, manganese ore and vanadic anhydride compound for reduce domestic coke
Fiery temperature.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of charcoal powder compound additive for reducing domestic coke ignition temperature, its parts by weight composition is charcoal powder 50~70
Part, 10~25 parts of potassium feldspar, 10~20 parts of manganese ore, 5~10 parts of vanadic anhydride.Preparation method of the present invention, including following step
Suddenly：
(1) by raw materials such as charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) the additive raw material and charcoal powder crushed is weighed respectively, and is mixed, and is 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 (0.15mm) of granularity≤100；It is subsequently cooled to normal temperature, as charcoal powder compound additive.
The application of charcoal powder compound additive of the present invention, comprises the following steps：
By charcoal powder compound additive：Mixed coal weight ratio is 2.0~15.0:100, charcoal powder 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 furnace charge
Normal temperature is down to 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 charcoal powder 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 354 from 550~630 DEG C
~412 DEG C, decline temperature amplitude is up to 196~218 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 charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the potassium feldspar 10kg crushed, manganese ore 10kg, vanadic anhydride 5kg respectively successively, while weigh wood
Powdered carbon (quality index：FCd64.6%, Vd29.6%, Ad5.8%) 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 charcoal powder compound additive (concrete composition：FCd47.6wt%,
Vd21.8wt%, V2O55.3wt%, K2O1.8wt%, MnO28.4wt%, MnO1.1wt%, Al2O32.2wt%,
SiO210.0wt%, Fe2O30.2wt%, CaO1.7wt%).
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) charcoal powder compound additive is pressed：Mixed coal weight ratio is 15.0:100, the charcoal powder 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：Heating
Measure (Qnet,ar) 5907kcal/kg, ash content (Ad) 20.4wt%, volatile matter (Vd) 4.3wt%, crushing strength (M25) 75.7%,
Fiery 354 DEG C of temperature (T), than surface (S) 39.2m2/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 59%, 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 1100 DEG C, is persistently added
Hot 16h, 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 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 | 354 | 196 |
Embodiment 2
(1) by raw materials such as charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the potassium feldspar 13.8kg crushed, manganese ore 13kg, vanadic anhydride 6.3kg respectively successively, claim simultaneously
Take charcoal powder (quality index：FCd68.2%, Vd26.5%, Ad5.3%) 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 charcoal powder compound additive (concrete composition：FCd45.2wt%,
Vd17.6wt%, V2O56.4wt%, K2O2.4wt%, MnO210.5wt%, MnO1.4wt%, Al2O32.9wt%,
SiO212.0wt%, Fe2O30.2wt%, CaO1.4wt%).
(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) charcoal powder compound additive is pressed：Mixed coal weight ratio is 11.8:100, the charcoal powder 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：Heating
Measure (Qnet,ar) 5895kcal/kg, ash content (Ad) 20.8wt%, volatile matter (Vd) 4.1wt%, crushing strength (M25) 77.9%,
Fiery 362.5 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 58%, 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 1050 DEG C, is persistently added
Hot 18h, 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 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 | 362.5 | 207.5 |
Embodiment 3
(1) by raw materials such as charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the potassium feldspar 17.5kg crushed, manganese ore 15kg, vanadic anhydride 7.5kg respectively successively, claim simultaneously
Take charcoal powder (quality index：FCd72.5%, Vd22.7%, Ad4.8%) 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 charcoal powder compound additive (concrete composition：FCd43.5wt%,
Vd13.6wt%, V2O57.5wt%, K2O3.0wt%, MnO211.9wt%, MnO1.6wt%, Al2O33.6wt%,
SiO214.0wt%, Fe2O30.2wt%, CaO1.2wt%).
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) charcoal powder compound additive is pressed：Mixed coal weight ratio is 8.5:100, the charcoal powder 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：Caloric value
(Qnet,ar) 5947kcal/kg, ash content (Ad) 20.5wt%, volatile matter (Vd) 3.7wt%, crushing strength (M25) 81.0%, catch fire
378 DEG C of temperature (T), than surface (S) 31.3m2/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 57%, flue dust emission reduction 78%.
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 persistently added
Hot 20h, 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 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 | 378 | 212 |
Embodiment 4
(1) by raw materials such as charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the potassium feldspar 21.3kg crushed, manganese ore 18kg, vanadic anhydride 8.7kg respectively successively, claim simultaneously
Take charcoal powder (quality index：FCd77.5%, Vd18.4%, Ad4.1%) 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 charcoal powder compound additive (concrete composition：FCd41.4wt%,
Vd9.8wt%, V2O58.4wt%, K2O3.5wt%, MnO213.9wt%, MnO1.8wt%, Al2O34.2wt%,
SiO215.8wt%, Fe2O30.3wt%, CaO0.9wt%).
(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) charcoal powder compound additive is pressed：Mixed coal weight ratio is 5.3:100, the charcoal powder 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) 6024kcal/kg, ash content (Ad) 19.9wt%, volatile matter (Vd) 3.4wt%, crushing strength (M25) 82.7%, catch fire
398.5 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 55%, flue dust emission reduction 77.5%.
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 | 398.5 | 211.5 |
Embodiment 5
(1) by raw materials such as charcoal, potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm.
(2) weigh the potassium feldspar 25kg crushed, manganese ore 20kg, vanadic anhydride 10kg respectively successively, while weigh wood
Powdered carbon (quality index：FCd86.3%, Vd10.5%, Ad3.2%) 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 charcoal powder compound additive.
As-fired coal material by 20wt% jet coal, 15t% meager coal, 30wt% 1/3 coking coal, 20wt% rich coal and
15wt% coking coal, which coordinates, forms 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) charcoal powder compound additive is pressed：Mixed coal weight ratio is 2.0:100, the charcoal powder 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) 6148kcal/kg, ash content (Ad) 18.6wt%, volatile matter (Vd) 3.1wt%, crushing strength (M25) 84.4%, catch fire
412 DEG C of temperature (T), than surface (S) 20.5m2/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 53%, 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 | 218 |
After can be seen that addition charcoal powder compound additive by the experimental result of embodiment 1~5, significantly reduce civilian
The burning-point of coke so that domestic coke is more easy to catch fire, and ensure that domestic coke as a kind of application of fuel.
Claims (7)
1. a kind of charcoal powder compound additive for reducing domestic coke ignition temperature, it is characterised in that parts by weight composition is charcoal powder
50~70 parts, 10~25 parts of potassium feldspar, 10~20 parts of manganese ore, 5~10 parts of vanadic anhydride.
A kind of 2. charcoal powder compound additive for reducing domestic coke ignition temperature as claimed in claim 1, it is characterised in that
The quality index of charcoal powder is：FCd ＞ 64%, Vd=10%~30%, Ad ＜ 6%.
3. such as a kind of preparation method of the charcoal powder compound additive of reduction domestic coke ignition temperature of claim 1 or 2, it is special
Sign is to comprise the following steps：
(1) by raw materials such as potassium feldspar, manganese ore and vanadic anhydrides respectively through thick broken, thin broken to granularity≤3mm；
(2) the additive raw material and charcoal powder crushed is weighed respectively, and is mixed, and is 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
≤ 150 mesh；It is subsequently cooled to normal temperature, as charcoal powder compound additive.
4. such as a kind of application of the charcoal powder compound additive of reduction domestic coke ignition temperature of claim 1 or 2, its feature exists
In comprising the following steps：
By charcoal powder compound additive：Mixed coal weight ratio is 2.0~15.0:100, charcoal powder 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 the domestic coke containing charcoal powder compound additive.
5. such as a kind of application of the charcoal powder compound additive of reduction domestic coke ignition temperature of claim 4, it is characterised in that
The quality index of the mixed coal is：FCd>=50%, Vdaf>=25%, Ad≤ 13.5%, Std＜ 1.0%.
6. such as a kind of application of the charcoal powder compound additive of reduction domestic coke ignition temperature of claim 4, it is characterised in that
Described screening be down to normal temperature furnace charge screening be 25-80mm granularities.
7. the domestic coke prepared such as any one of claim 4-6 applications, it is characterised in that the primary quality measure of domestic coke
It 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。
Priority Applications (1)
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| CN101775301A (en) * | 2010-02-22 | 2010-07-14 | 肖国雄 | Biomass coke and preparation method thereof |
| CN105602640A (en) * | 2016-02-24 | 2016-05-25 | 太原理工大学 | Potassium feldspar composite additive for reducing ignition temperature of civil coke and preparing method and application |
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| CN101775301A (en) * | 2010-02-22 | 2010-07-14 | 肖国雄 | Biomass coke and preparation method thereof |
| CN105602640A (en) * | 2016-02-24 | 2016-05-25 | 太原理工大学 | Potassium feldspar composite additive for reducing ignition temperature of civil coke and preparing method and application |
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Application publication date: 20171201 |