CN107011961A - Lignite compound additive and preparation method and the application of civilian clean coke ignition temperature can effectively be reduced - Google Patents
Lignite compound additive and preparation method and the application of civilian clean coke ignition temperature can effectively be reduced Download PDFInfo
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- CN107011961A CN107011961A CN201710431002.XA CN201710431002A CN107011961A CN 107011961 A CN107011961 A CN 107011961A CN 201710431002 A CN201710431002 A CN 201710431002A CN 107011961 A CN107011961 A CN 107011961A
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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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Coke Industry (AREA)
Abstract
A kind of parts by weight composition of lignite compound additive that can effectively reduce civilian clean coke ignition temperature is 30~50 parts of lignite, 15~25 parts of lime stone, 5~10 parts of manganese dioxide.Raw material sources of the present invention enrich extensively, cheap, are added directly in mixed coal, by civilian clean coke made from high-temperature retorting, its ignition temperature can be reduced to 365~430 DEG C from 550~630 DEG C, and decline temperature amplitude is up to 100~200 DEG C, effect significantly, can reach the civilian purpose of coke.
Description
Technical field
The present invention relates to a kind of lignite compound additive that can effectively reduce civilian clean coke ignition temperature and preparation side
Method and application.
Background technology
Rural household fire coal environmental pollution can not be ignored.According to initial estimate, northern country 1 ton high volatilization of often burning is former
Coal, it will discharge more than 2.5 tons of carbon dioxide (carbon emission coefficient 0.67), more than 150 kilograms other and stain thing (oxidation of coal
Rate 0.85).2014 it is civilian it is scattered burning coal consumption be 1.6 hundred million tons, only account for the 3.8% of national coal consumption, using sulfur dioxide (SO2) emissions as
Example, power plant of China annual emissions are 2,000,000 tons, and civilian scattered burning is then up to 3,200,000 tons, is 1.6 times of power plant emission total amount.This
Outside, a series of problems, such as the smoke contamination of civilian scattered burning coal, nitrogen oxides pollution, cinder pollution to the destruction of ecological environment more
It is inestimable.However, being influenceed by factors such as region, economy, culture, solve very difficult.Want fundamentally to solve
Certainly the pollution that caused by coal burning problem of rural area and samll cities and towns, is when business for these regional high-quality, low price, alternative fuel of cleaning of providing
It is anxious.
Domestic coke is based on bunker coal (thermal coal), and to be 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 of be difficult slagging, without desulfurization equipment, tail gas can meet discharging standards；And easy point
Fiery, continuous fiery ability is strong, programming rate is fast, firing duration is long, is the various preferable fuel of domestic life stove.
Coke is used as domestic fuel, it is necessary to the problem of solving high coke ignition temperature, 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 400 DEG C or so are down to, to meet civilian furnace igniting requirement.
Patent on combustion-supporting agent for fuel coal is a lot, as CN90105106.3 discloses a kind of combustion-supporting agent for fuel coal, and it contains
There are boron mud, lime stone, bauxite, white clay, manganese slag, iron oxide, canebreak and sodium carbonate, sodium nitrate, three kinds of sodium of sodium chloride
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 is constituted, and is well mixed combustion adjuvant by a certain percentage with coal when using；CN201310417513.8 discloses one
Efficient energy-saving combustion-supporting agent for fuel coal and preparation method thereof is planted, 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.Due to civilian clean burnt
Charcoal needs most of component in the special process by high-temperature retorting, combustion-supporting agent for fuel coal to be failed because of pyrolytic, no longer
With combustion-supporting ability；Therefore, domestic coke can not use the combustion-supporting agent for fuel coal of prior art.Through retrieval, reduction domestic coke
The additive of fiery temperature has no report.
The content of the invention
It is an object of the invention to provide a kind of lignite compound additive that can effectively reduce domestic coke burning-point and its preparation
Methods and applications.
The most of tarnishes of lignite, real density is in 1.10~1.40g/cm3Between, moisture is up to 30wt%~60wt%,
Volatile matter is high, and burning-point is low, does not bond, and easy-weathering goes bad, containing primary humic acid, oxygen-containing height, and chemical reactivity is strong, heat endurance
Difference.
There is significant difference in the present invention, be mainly manifested in using the combustion adjuvant of lignite and prior art：1) temperature of catching fire is reduced
The mechanism of degree is different.Traditional combustion-supporting agent for fuel coal is by improving the Volatile of coal or providing going back for lower valency under the high temperature conditions
Original matter, can play a part of accelerating oxygen diffusion, so as to reduce the ignition temperature of fire coal.Or from as combustibles, lean on
Spontaneous combustion is ignited coal, but the combustion adjuvant absolute prohibition high-temperature process, otherwise will lose combustion-supporting effect；The combustion-supporting effect of the present invention comes from
Lignite itself is low ignition point, low degree of graphitization and the high coal of volatile matter, can be in high temperature added in civilian clean coke raw material
Make coke formation varying number and the micropore of size during destructive distillation, increase and improve the microcellular structure of civilian clean coke, reduce the people
With the degree of graphitization of clean coke, so as to reduce the ignition temperature of civilian clean coke.2) stage is added different.Traditional fire coal is helped
Fire many additions, then blended, cohesive, cold moudling before prepared by moulded coal of agent；Or directly enter stove burning after being mixed with scattered coal.This
Patent auxiliary agent is added before destructive distillation during coal blending, it is blended, make firm by ramming, high-temperature retorting turn into civilian clean coke.
Lignite is the extraordinary coal of chemism, and lignite is used to reduce the graphite of civilian clean coke first by the present invention
Change degree, increase its specific surface area so as to reach reduce its ignition temperature effect.
To achieve these goals, the technical scheme that the present invention takes is as follows：
A kind of effectively to reduce the lignite compound additive of civilian clean coke ignition temperature, its parts by weight composition is lignite
30~50 parts, 15~25 parts of lime stone, 5~10 parts of manganese dioxide.
Preparation method of the present invention, comprises the following steps：
(1) lignite is dried 0.5~1.5 hour under the conditions of 80~120 DEG C；
(2) by dried lignite, lime stone, manganese dioxide feedstock respectively through thick broken, thin broken to granularity≤3mm；
(3) raw material crushed is weighed respectively, and is mixed, and is stirred.
(4) compound stirred makes the mesh (0.1mm) of its granularity≤150, the as compound addition of lignite through dry grinding
Agent.
The application of lignite compound additive of the present invention, comprises the following steps：
By lignite compound additive：The weight ratio of mixed coal is 1.0~5.0:100, lignite compound additive is added to
In mixed coal, isolation air is heated to 900~1100 DEG C, 16~24h of continuous heating, after red heat furnace charge is come out of the stove in gas retort
Through quenching process, then it is screened, that is, obtain the domestic coke containing lignite compound additive.
The quality index of the mixed coal is：FCd>=50%, Vdaf>=25%, Ad≤ 25%, Std＜ 1.5%.
Screening as described above is that the furnace charge that will drop to normal temperature is sieved as 25-80mm granularities.
Compared with prior art, advantage that is that it directly brings and necessarily leading to and good effect are as follows by the present invention：
In the methods of the invention, the lignite compound additive used, raw material sources enrich extensively, cheap, directly
Connect added in mixed coal, by civilian clean coke made from high-temperature retorting, its ignition temperature can be from 550~630 DEG C of reductions
To 365~430 DEG C, decline temperature amplitude is up to 100~200 DEG C, and effect significantly, can reach the civilian purpose of coke.
Embodiment
Embodiment of the invention is made below and further being illustrated.
Embodiment 1
(1) lignite is dried 1 hour at 100 DEG C；
(2) by dried lignite, lime stone, manganese dioxide feedstock respectively through thick broken, thin broken to granularity≤3mm；
(3) the lignite 50kg crushed, lime stone 10kg, manganese dioxide 5kg are weighed respectively, and is mixed, and stirring is equal
It is even.
(4) compound stirred is through dry grinding, and it is lignite compound additive to make the mesh of its granularity≤150；
(5) as-fired coal material is by 15wt% 1/3 coking coal of jet coal, 10wt% meager coal, 40wt%, 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=65, fineness (≤3mm)=70.6%；
(6) lignite compound additive is pressed：The weight ratio of mixed coal is 5.0:100, the lignite compound additive made is added
It is added in mixed coal, air is completely cut off in gas retort and is heated to 1100 DEG C, continuous heating 16h, 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 containing lignite compound additive that granularity is 25-80mm.
Comparative example：Without any additive in mixed coal, isolation air is heated to 1100 DEG C in gas retort, persistently adds
Hot 16h, normal temperature is down to after then red heat furnace charge is come out of the stove through quenching process, then screened, and gained coke 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
Test result as shown in table 1.
Table 1 adds lignite 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 | 585 | - |
| Add civilian Jiao of compound additive | 378 | 207 |
Embodiment 2
(1) lignite is dried 0.5 hour at 120 DEG C；
(2) by dried lignite, lime stone, manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤
3mm；
(3) the lignite 40kg crushed, lime stone 15kg, manganese dioxide 10kg are weighed respectively, and is mixed, and stirring is equal
It is even.
(4) compound stirred is through dry grinding, and it is lignite compound additive to make the mesh of its granularity≤150；
(5) as-fired coal not gluing by 20wt% weakly caking coal, 25wt% jet coal, 45wt% gas rich coal and 10wt%
Coal, which coordinates, forms mixed coal；Its quality index (wt%)：Vadf35.0%, Ad13.0%, FCd56.7%, St,d0.84%, bond
Index G=40, fineness (≤3mm)=86.5%；
(6) lignite compound additive is pressed:The weight ratio of mixed coal is 4:100, the lignite compound additive made is added
Into mixed coal, isolation air is heated to 1050 DEG C in gas retort, and continuous heating 18h 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 containing lignite compound additive that granularity is 25-80mm.
Comparative example：Without any additive in mixed coal, isolation air is heated to 1050 DEG C in gas retort, persistently adds
Hot 18h, normal temperature is down to after then red heat furnace charge is come out of the stove through quenching process, then screened, and gained coke 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
Test result as shown in table 2.
Table 2 adds lignite 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 | 565 | - |
| Add civilian Jiao of compound additive | 385 | 180 |
Embodiment 3
(1) lignite is dried 0.8 hour at 110 DEG C；
(2) by dried lignite, lime stone, manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤
3mm；
(3) the lignite 40kg crushed, lime stone 20kg, manganese dioxide 5kg are weighed respectively, and is mixed, and stirring is equal
It is even.
(4) compound stirred is through dry grinding, and it is lignite compound additive to make the mesh of its granularity≤150；
(5) as-fired coal by 20wt% 1/3 coking coal of jet coal, 15wt% meager coal, 30wt%, 20wt% rich coal and
15wt% coking coal, which coordinates, forms mixed coal；The quality index of its mixed coal is：Vadf26.0%, Ad12.8%, FCd62.3,
St,d0.67%；Adhesive index=60, fineness (≤3mm)=73.6%；
(6) lignite compound additive is pressed：The weight ratio of mixed coal is 3:100, the lignite compound additive made is added
Into mixed coal, isolation air is heated to 1000 DEG C in gas retort, and continuous heating 20h 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 containing lignite compound additive that granularity is 25-80mm.
Comparative example：Without any additive in mixed coal, isolation air is heated to 1000 DEG C in gas retort, persistently adds
Hot 20h, normal temperature is down to after then red heat furnace charge is come out of the stove through quenching process, then screened, and gained coke 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
Test result as shown in table 3.
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 | 572 | - |
| Add civilian Jiao of compound additive | 437 | 135 |
Embodiment 4
(1) lignite is dried 1.2 hours at 80 DEG C；
(2) by dried lignite, lime stone, manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤
3mm；
(3) the lignite 45kg crushed, lime stone 10kg, manganese dioxide 10kg are weighed respectively, and is mixed, and stirring is equal
It is even.
(4) compound stirred is through dry grinding, and it is lignite compound additive to make the mesh of its granularity≤150；
(5) as-fired coal not gluing by 15wt% weakly caking coal, 20wt% jet coal, 50wt% gas rich coal and 15wt%
Coal, which coordinates, forms mixed coal；Its quality index (wt%)：Vadf28.0%, Ad16.3%, FCd58.2%, St,d0.84%, bond
Index G=52, fineness (≤3mm)=82.5%；
(6) lignite compound additive is pressed：The weight ratio of mixed coal is 2:100, the lignite compound additive made is added
Into mixed coal, isolation air is heated to 950 DEG C, continuous heating 22h, through putting out after then red heat furnace charge is come out of the stove in gas retort
Burnt process is down to normal temperature, then screened, obtains the domestic coke containing lignite compound additive that granularity is 25-80mm.
Comparative example：Without any additive in mixed coal, isolation air is heated to 950 DEG C in gas retort, persistently adds
Hot 22h, normal temperature is down to after then red heat furnace charge is come out of the stove through quenching process, then screened, and gained coke 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
Test result as shown in table 4.
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 | 533 | - |
| Add civilian Jiao of compound additive | 411 | 122 |
Embodiment 5
(1) lignite is dried 1.5 hours at 80 DEG C；
(2) by dried lignite, lime stone, manganese dioxide additive raw material respectively through thick broken, thin broken to granularity≤
3mm；
(3) the lignite 45kg crushed, lime stone 15kg, manganese dioxide 10kg are weighed respectively, and is mixed, and stirring is equal
It is even.
(4) compound stirred is through dry grinding, and it is lignite compound additive to make the mesh of its granularity≤150；
(5) as-fired coal material is by 10wt% 1/3 coking coal of jet coal, 15wt% meager coal, 30wt%, 20wt% rich coal
Coordinate with 25wt% coking coal and form mixed coal；The quality index of its mixed coal is：Vadf25.0%, Ad15.3%,
FCd61.6%, St,d0.67%；Adhesive index=48, fineness (≤3mm)=78.3%；
(6) lignite compound additive is pressed：The weight ratio of mixed coal is 1:100, the lignite compound additive made is added
Into mixed coal, isolation air is heated to 900 DEG C, continuous heating 24h, through putting out after then red heat furnace charge is come out of the stove in gas retort
Burnt process is down to normal temperature, then screened, obtains the domestic coke containing lignite compound additive that granularity is 25-80mm.
Comparative example：Without any additive in mixed coal, isolation air is heated to 900 DEG C in gas retort, persistently adds
Hot 24h, normal temperature is down to after then red heat furnace charge is come out of the stove through quenching process, then screened, and gained coke 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
Test result as shown in table 5.
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 | 525 | - |
| Add civilian Jiao of compound additive | 425 | 100 |
It is can be seen that by the experimental result of embodiment 1~5 after addition lignite compound additive, significantly reduce civilian Jiao
The burning-point of charcoal so that domestic coke is more easy to catch fire, it is ensured that domestic coke is used as a kind of application of fuel.
Claims (5)
1. a kind of can effectively reduce the lignite compound additive of civilian clean coke ignition temperature, it is characterised in that parts by weight are constituted
For 30~50 parts of lignite, 15~25 parts of lime stone, 5~10 parts of manganese dioxide.
2. a kind of system for the lignite compound additive that can effectively reduce civilian clean coke ignition temperature as claimed in claim 1
Preparation Method, it is characterised in that comprise the following steps：
(1) lignite is dried 1~2 hour under the conditions of 80~120 DEG C；
(2) by dried lignite, lime stone, manganese dioxide feedstock respectively through thick broken, thin broken to granularity≤3mm；
(3) raw material crushed is weighed respectively, and is mixed, and is stirred；
(4) compound stirred makes the mesh of its granularity≤150, as lignite compound additive through dry grinding.
3. a kind of lignite compound additive that can effectively reduce civilian clean coke ignition temperature as claimed in claim 1 should
With, it is characterised in that comprise the following steps：
By lignite compound additive：The weight ratio of mixed coal is 1.0~5.0:100, lignite compound additive is added to cooperation
In coal, isolation air is heated to 900~1100 DEG C, 16~24h of continuous heating, through putting out after red heat furnace charge is come out of the stove in gas retort
Burnt process, then it is screened, that is, obtain the domestic coke containing lignite compound additive.
4. a kind of lignite compound additive that can effectively reduce civilian clean coke ignition temperature as claimed in claim 3 should
It is with, it is characterised in that the quality index of the mixed coal：FCd>=50%, Vdaf>=25%, Ad≤ 25%, Std＜ 1.5%.
5. a kind of lignite compound additive that can effectively reduce civilian clean coke ignition temperature as claimed in claim 3 should
With, it is characterised in that described screening is that the furnace charge that will drop to normal temperature is sieved as 25-80mm granularities.
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