CN101314742A - Multicomponent co-combustion agent and use method thereof - Google Patents
Multicomponent co-combustion agent and use method thereof Download PDFInfo
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- CN101314742A CN101314742A CNA2008101155979A CN200810115597A CN101314742A CN 101314742 A CN101314742 A CN 101314742A CN A2008101155979 A CNA2008101155979 A CN A2008101155979A CN 200810115597 A CN200810115597 A CN 200810115597A CN 101314742 A CN101314742 A CN 101314742A
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Abstract
The invention relates to a multi-doped sintering agent and the usage thereof. The multi-doped sintering agent consists of a main material and a core material, wherein the main material includes one or any combination of carbide slag, soda slug, quick lime or limestone; the core material includes mineralizer, salt-melting medium and coke slag bulking agent. The usage of the multi-doped sintering agent comprises the following steps: crushing, mixing and pulverizing each component of the multi-doped sintering agent; mixing the pulverized multi-doped sintering agent with coal to form a coal mixture; burning and calcining the coal mixture in a boiler; and cooling and collecting hydraulic binding material modified ash. The multi-doped sintering agent can reduce the carbon content of fly ash and reduce the coal consumption of the boiler and can achieve high-efficiency solid desulfurization. The hydraulic binding material active ash produced after the coal burning has wide purposes, thus achieving multiple purposes of one boiler and achieving good effects of fluidized-bed combustion boiler such as environment protection, energy conservation and high-efficiency waste utilization.
Description
Technical field
The present invention relates to the bunker coal field, particularly relate to a kind of multicomponent co-combustion agent and using method thereof.
Background technology
Boiler is the favor that advantages such as the equipment of widely used production heating power, particularly fluidized-bed combustion boiler (comprising fluidizing furnace, circular fluid bed etc.) are strong with its coal adaptability, save energy more and more are subjected to vast heating power user.But fluidized-bed combustion boiler also has following defective:
(1) coal consumption height, thermo-efficiency is up to 85%, compares coal-powder boiler, cyclone furnace thermo-efficiency is on the low side.
(2) boiler abrasion is big, and operational efficiency is low.Major cause is to be required to be particulate state into the stove coal, and circulation ratio is about 30, and the recycle stock granularity is on average about 300 μ m, therefore to wearing and tearing such as heat exchanging pipes greatly.
(3) flyash loss on ignition height is generally 13-20%, is up to more than 25%, is difficult to utilize.
In recent years, in order to effectively reduce fluidized-bed combustion boiler flue gas SO
2Discharging, people usually adopt the method for adding limestone powder in bunker coal, remove SO in the burning of coal process with its limestone powder in boiler
2But because Wingdale resolves into CaO and CO in about 900 ℃ in boiler furnace
2The time absorb a large amount of heats, this will influence the trouble-free burning of boiler and exert oneself, even cause the accident of burner hearth fire extinguishing, so the addition of Wingdale can only be very low, not only the low but also so-called high calcium desulfurized powder coal ash that obtain of desulfuration efficiency does not obtain modification yet, is difficult to utilize.The undesirable action of carbon residue in the flyash that obtains in addition, (or the loss on ignition that claims usually) has influenced the capability and performance of pulverized fuel ash cement finished product.Carbon residue porous in the flyash has very strong water-absorbent, and the existence of carbon residue has increased the water requirement of flyash, has reduced the intensity of flyash aggregate, thereby has reduced the impervious and anti-freezing property of finished product; Simultaneously, form one deck hydrophobic film, hindered the hydration reaction of active substance, the cohesion of flyash is assembled play discrete, destruction on its surface; The existence of carbon residue has also reduced the utilization rate of heat value and the boiler thermal output of coal.Therefore Wingdale utilize scope narrower, both do not reached the sweetening effectiveness of expection and fundamentally do not solve flyash whole, efficiently utilize problem.In addition,, make that also the defective of above-mentioned fluidized-bed combustion boiler is more outstanding, cause fusing point to reduce easily coking into the stove coal ash because the physical and chemical performance of Wingdale is limit.
Summary of the invention
The purpose of this invention is to provide a kind of multicomponent co-combustion agent and using method thereof, it is low effectively to overcome in the prior art efficiency of combustion of coal combustion equipment, can not all, efficiently utilize technological deficiencies such as flyash.
For achieving the above object, the invention provides a kind of multicomponent co-combustion agent, form by major ingredient and core material; Wherein, major ingredient comprises any one or arbitrary combination of carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent.Preferably, described core material package is drawn together wollastonite, gypsum, industrial calcium chloride and barite, perhaps wollastonite, gypsum, industrial residue and barite.
On the basis of technique scheme, described multicomponent co-combustion agent comprises the moiety of following weight percent: major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial calcium chloride 0-20% and barite 0-10%, perhaps major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial residue 0-20% and barite 0-10%.
For achieving the above object, the present invention also provides a kind of using method of multicomponent co-combustion agent, comprising:
Each component of described multicomponent co-combustion agent is carried out fragmentation, batching and grinding;
With multicomponent co-combustion agent behind the grinding and the coal-fired coal charge mixture that forms;
The coal charge mixture burns in boiler and calcines;
Cooling is also collected hydraulic cementing materials modification ash.
The step of each component of described multicomponent co-combustion agent being carried out fragmentation, batching and grinding is specially: with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over less than 50% to fineness the multicomponent co-combustion agent grinding.
Multicomponent co-combustion agent behind the grinding is specially with the coal-fired step that forms the coal charge mixture: with multicomponent co-combustion agent behind the grinding and fire coal is 1 by weight percentage: 19-2: 8 ratio is mixed, and forms the coal charge mixture.
Multicomponent co-combustion agent behind the grinding and the coal-fired step that forms the coal charge mixture are specially:
With multicomponent co-combustion agent behind the grinding and fire coal is 1 by weight percentage: 19-2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode;
From the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms.
The coal charge mixture burns in boiler and the incinerating step is specially: the coal charge mixture burns under 850-1050 ℃ temperature environment in fluidized-bed combustion boiler and calcines.
The coal charge mixture burns in boiler and the incinerating step is specially:
The coal charge mixture burns under 850-1050 ℃ temperature environment in fluidized-bed combustion boiler and calcines, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating;
Hydraulic cementing materials modification ash is drawn from the exit end of fluidized-bed combustion boiler.
After cooling and collecting hydraulic cementing materials modification ash, also comprise: the gypsum and the weight percent that are 0-5% with the grey admixture weight percent of hydraulic cementing materials modification are the Portland clinker of 0-15%, to be used for the masonry cement of direct production country's current standards 12.5 and 22.5 strength grades.
After cooling and collecting hydraulic cementing materials modification ash, also comprise: the Portland clinker and the weight percent that are 45-55% with the grey admixture weight percent of hydraulic cementing materials modification are the gypsum of 0-5%, to be used to produce flyash or the composite Portland cement of national current standards more than or equal to 32.5 strength grades.
Described hydraulic cementing materials modification ash is used to produce concrete or building material made.
The invention provides a kind of multicomponent co-combustion agent and using method thereof, have the following advantages:
1, multicomponent co-combustion agent can quicken the chemical reaction process of mineral formation and fixed desulfurization, gives the interior material reaction of second stove of meter and has striven for the quality time, has created favourable condition: CaO and SiO in the time of 600-700 ℃
2, Al
2O
3Deng beginning to form the low-temperature eutectic thing, thereby CaO and SiO have been promoted
2, Al
2O
3Deng formation CA, the C of reacting
2Mineral crystallite and some transitional mineral such as S, along with the rising of temperature, the crystallite of these mineral is grown gradually and is grown up, and content also increases gradually, C when temperature reaches 800-850 ℃
12A
7Begin to form Deng mineral, when temperature reached 900 ℃ of left and right sides, mineral such as silicate, aluminate formed in a large number; Follow the formation of mineral such as silicate simultaneously, also finished the reaction process of flue gas desulfurization, and, the desulfurization reversed reaction can not take place, so the synthesis desulfurating rate is than higher because stove internal combustion temperature is lower.
2, because Ba
2+Etc. cationic intervention, mineral such as Dicalcium Phosphate (Feed Grade) have been played the effect that stable high reactivity crystal formation and lattice keep more defective, thereby improved the hydraulically active of these mineral and even whole hydraulic cementing materials;
3, multicomponent co-combustion agent can improve the ash melting characteristic and have the effect of loose cinder, therefore helps a materials flowization and fluidized combustion.
There is uncombined free CaO to occur when 4, flyash modified.But because fluidized-bed combustion boiler internal combustion temperature is lower, oxide compounds such as uncombined calcium, silicon, aluminium are without high-temperature calcination more than 1000 ℃, still maintain high reaction activity and high, mineral pairs such as silico-aluminate are flyash modified makes direct contribution though they fail to form, but hydration reaction can progressively take place in (particularly in the further hydration process) in hydration process, form aquation gelling products such as hydrated calcium silicate, drated calcium aluminate, to the increase performance beneficial effect of product later strength and weather resistance.
5, forming mineral such as silicate and desulfurization in view of multicomponent co-combustion agent, to form sulfate mineral etc. all are thermopositive reaction, in time give in the boiler and replenished the part heat, alleviated the load impact of coal ash decomposition of components heat dissipation, help burning of coal, improved efficiency of combustion, reduce mechanical incomplete combustion, thereby reduced the carbon content of flyash; Simultaneously, because the adding of multicomponent co-combustion agent has increased the blackness of flame, improved radiative transfer efficient, the influence of composite factors such as above-mentioned in addition thermopositive reaction thermo-efficiency and fly ash carbon content reduction has also obtained the good result that reduces boiler coal consumption.
6, the use of multicomponent co-combustion agent can solve the shortcoming of fluidized-bed combustion boiler effectively, makes fluidized-bed combustion boiler reach environmental protection, the energy-conservation and efficient purpose of utilizing of refuse, creates favorable economic benefit, environmental benefit and social benefit.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the using method schema of multicomponent co-combustion agent of the present invention;
Fig. 2 is the multicomponent co-combustion agent of the present invention after with grinding and the coal-fired coal charge mixture flow process figure that forms;
Fig. 3 burns in boiler for coal charge mixture of the present invention and calcines schema
Fig. 4 is the concrete using method schema of multicomponent co-combustion agent of the present invention.
Embodiment
Multicomponent co-combustion agent first embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial calcium chloride and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: carbide slag 70%, wollastonite 5%, gypsum 5%, industrial calcium chloride 10% and barite 10%.
Multicomponent co-combustion agent second embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial calcium chloride and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: soda ash slag 80%, wollastonite 10%, gypsum 2%, industrial calcium chloride 5% and barite 3%.
Multicomponent co-combustion agent the 3rd embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial calcium chloride and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: unslaked lime 95%, wollastonite 2% and industrial calcium chloride 3%.
Multicomponent co-combustion agent the 4th embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial residue and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: Wingdale 70%, wollastonite 5%, gypsum 2%, industrial residue 20% and barite 3%.
Multicomponent co-combustion agent the 5th embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial residue and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: carbide slag and soda ash slag 80%, wollastonite 2%, gypsum 10%, industrial residue 3% and barite 5%.
Multicomponent co-combustion agent the 6th embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial residue and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: soda ash slag, unslaked lime and Wingdale 95%, wollastonite 3%, gypsum 1% and barite 1%.
Multicomponent co-combustion agent the 7th embodiment of the present invention
Multicomponent co-combustion agent is made up of major ingredient and core material; Wherein, major ingredient comprises carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent, and the core material can specifically comprise wollastonite, gypsum, industrial residue and barite.Multicomponent co-combustion agent comprises the moiety of following weight percent: carbide slag, soda ash slag, unslaked lime and Wingdale 80%, wollastonite 8%, gypsum 2% and industrial residue 10%.
Technical scheme by above-mentioned multicomponent co-combustion agent first embodiment to the of the present invention seven embodiment as can be seen, multicomponent co-combustion agent of the present invention is to form by the major ingredient in the technical scheme of above-mentioned first embodiment to the, seven embodiment and core material are mixed with, compared with prior art, multicomponent co-combustion agent of the present invention has following implementation result:
1, flyash carbon drop modification
The present invention can quicken the speed that burns of coal on the one hand by add multicomponent co-combustion agent in fluidized-bed combustion boiler, reduces heat loss due to combustibles in refuse, thereby improves burning of coal efficient, reduces fly ash carbon content effectively; On the other hand, in coal combustion, most of sulphur generation gas, solid state reaction in each component of multicomponent co-combustion agent and coal ash and the coal, in coal charge mixing and working cycle, realize the modification of flyash, finally be sintered into gelling material, be commonly referred to as modification ash (or cement of low index grog) with hydraulically active.Thereby can fundamentally solve it and utilize problem, resource can fully be effectively utilized.In order to prove absolutely the implementation result of flyash carbon drop of the present invention modification, table 1 has provided the assay of modification ash physicals, and table 2 has provided the detected result of fly ash carbon content.
The assay of table 1. modification ash physicals
The assay of table 2. fly ash carbon content
2, reduce boiler coal consumption
The present invention has reduced fly ash carbon content effectively owing to add multicomponent co-combustion agent; Simultaneously, owing to improved based on heat exchanger effectiveness in the stove of radiative transfer after adding multicomponent co-combustion agent, under the constant the same terms of coal-supplying amount, capacity of boiler is increase obviously; In addition, multicomponent co-combustion agent and coal ash component form the combination reaction heat release of mineral, also can replenish the small part heat to boiler.Therefore, after adding multicomponent co-combustion agent, the integrated heat efficiency of boiler systems will be improved, and boiler coal consumption can reduce by 2.32%.
3, efficient fixed desulfurization
Contain fixed sweetening agent in the multicomponent co-combustion agent, in coal combustion, realize fixed desulfurization.After multicomponent co-combustion agent adds fluidized-bed combustion boiler, in the thorough mixing of coal charge in stove (and circulation) process, in the multicomponent co-combustion agent contained sorbent particle directly and promptly with coal combustion process in the SO that produces
2Consolidation reaction takes place, suppress it and discharge with flue gas, desulfurization product forms stable mineral tax and is stored in the modified product, thereby reaches than adopting the even more ideal sweetening effectiveness of Wingdale, and the flue gas desulphuization rate of multicomponent co-combustion agent of the present invention can reach more than 80%.
(1) when addition content is identical, since multicomponent co-combustion agent of the present invention go into behind the stove with ash content of coal and coal in the effective reaction time of sulphur longer than Wingdale, and are furnished with mineralizer, salt fusible dielectric and the cinder raising agent etc. that fixed desulfurization in the stove, the solid phase thermopositive reaction etc. that forms mineral played katalysis in the multicomponent co-combustion agent, remarkable fast reaction speed, this is concerning in the residing time in furnace of second, and is crucial beyond doubt.In addition, because multicomponent co-combustion agent participates in that the incinerating chemical reaction efficiency is better than Wingdale in the stove, so the heat effect etc. that forms the mineral thermopositive reaction in the stove wants high, thereby improved efficiency of combustion, help reducing flyash carbon residue content, and help economizing on coal and flyash modified.So multicomponent co-combustion agent of the present invention not only sweetening effectiveness is better than Wingdale, fixed desulfuration efficiency also obviously improves, and obtained significant flyash carbon drop, reduced the effect of boiler coal consumption, flyash obtains effective modification, reaches efficient utilization, this be add Wingdale can't accomplish.
(2) under equal desulfuration efficiency situation, multicomponent co-combustion agent of the present invention can reduce over half than the doping level of Wingdale, therefore, boiler of power plant system device load and wearing and tearing can correspondingly reduce significantly, operational efficiency improves, thereby prolong the work-ing life of system device, help the stable operation of system device long-term safety.
In addition, the present invention does not need ad hoc desulfurizer, and the reaction package that the while desulfuration in furnace generates mineral is contained in the process of producing modified product, and investment running cost also calculates in the modified product respectively, so from the desulfurization angle, be zero input, zero cost operation.
In addition, compare with existing wet desulphurization method, the present invention has overcome at SO
2Enter the defective of carrying out desulfurization again behind the flue gas (boiler and pipeline have been caused corrosion), especially solved that investment is big, operation and maintenance cost is high, wasted resource and caused a difficult problem such as secondary pollution, and desulfurization product becomes beneficial mineral and all enters in the modified product, is fully effectively utilized.
Fig. 1 is the using method schema of multicomponent co-combustion agent of the present invention, is specially:
Fig. 2 is the multicomponent co-combustion agent of the present invention after with grinding and the coal-fired coal charge mixture flow process figure that forms, and in technical scheme shown in Figure 1, step 2 is specially:
Fig. 3 burns in boiler for coal charge mixture of the present invention and calcines schema, and in technical scheme shown in Figure 1, step 3 is specially:
Fig. 4 is the concrete using method schema of multicomponent co-combustion agent of the present invention.
Using method first embodiment of multicomponent co-combustion agent of the present invention
Step 101, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 45% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 102, be that 1: 19 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 103, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 104, coal charge mixture burn under 850 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 105, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 106, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 107, hydraulic cementing materials modification ash is used for the masonry cement of direct production country current standards 12.5 strength grades.
Using method second embodiment of multicomponent co-combustion agent of the present invention
Step 201, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 40% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 202, be that 1: 9 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 203, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 204, coal charge mixture burn under 950 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 205, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 206, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 207, with the gypsum of hydraulic cementing materials modification ash admixture 2% and 8% Portland clinker, to be used for the masonry cement of direct production country current standards 22.5 strength grades.
Using method the 3rd embodiment of multicomponent co-combustion agent of the present invention
Step 301, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 30% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 302, be that 2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 303, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 304, coal charge mixture burn under 1050 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 305, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 306, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 307, with the gypsum of hydraulic cementing materials modification ash admixture 2%, to be used for the masonry cement of direct production country current standards 12.5 strength grades.
Using method the 4th embodiment of multicomponent co-combustion agent of the present invention
Step 401, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 45% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 402, be that 1: 19 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 403, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 404, coal charge mixture burn under 850 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 405, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 406, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 407, with the gypsum of hydraulic cementing materials modification ash admixture 5%, to be used for the masonry cement of direct production country current standards 12.5 strength grades.
Using method the 5th embodiment of multicomponent co-combustion agent of the present invention
Step 501, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 40% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 502, be that 1: 9 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 503, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 504, coal charge mixture burn under 950 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 505, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 506, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 507, with the Portland clinker of hydraulic cementing materials modification ash admixture 8%, to be used for the masonry cement of direct production country current standards 22.5 strength grades.
Using method the 6th embodiment of multicomponent co-combustion agent of the present invention
Step 601, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 30% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 602, be that 2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 603, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 604, coal charge mixture burn under 1050 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 605, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 606, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 607, with the Portland clinker of hydraulic cementing materials modification ash admixture 15%, to be used for the masonry cement of direct production country current standards 22.5 strength grades.
Using method the 7th embodiment of multicomponent co-combustion agent of the present invention
Step 701, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 45% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 702, be that 1: 19 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 703, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 704, coal charge mixture burn under 850 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 705, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 706, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 707, with the Portland clinker of hydraulic cementing materials modification ash admixture 45%, to be used to produce the composite Portland cement of national current standards 32.5 strength grades.
Using method the 8th embodiment of multicomponent co-combustion agent of the present invention
Step 801, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 40% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 802, be that 1: 9 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 803, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 804, coal charge mixture burn under 950 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 805, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 806, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 807, with the Portland clinker of hydraulic cementing materials modification ash admixture 50% and 5% gypsum, to be used to produce the composite Portland cement of national current standards 42.5 strength grades.
Using method the 9th embodiment of multicomponent co-combustion agent of the present invention
Step 901, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 30% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 902, be that 2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 903, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 904, coal charge mixture burn under 1050 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 905, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 906, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 907, with the Portland clinker of hydraulic cementing materials modification ash admixture 55% and 5% gypsum, to be used to produce the Portland fly ash cement of national current standards 42.5 strength grades.
Using method the tenth embodiment of multicomponent co-combustion agent of the present invention
Step 1001, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 40% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 1002, be that 1: 9 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 1003, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 1004, coal charge mixture burn under 950 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 1005, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 1006, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 1007, above-mentioned hydraulic cementing materials modification ash is used to produce concrete.
Using method the 11 embodiment of multicomponent co-combustion agent of the present invention
Step 1101, with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over 30% to fineness the multicomponent co-combustion agent grinding, store also homogenizing;
Step 1102, be that 2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode by weight percentage with the multicomponent co-combustion agent behind the grinding and fire coal;
Step 1103, from the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms;
Step 1104, coal charge mixture burn under 1050 ℃ temperature environment in fluidized-bed combustion boiler and calcine, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating; Discharge the furnace bottom slag simultaneously, slag and in bulk dispatching from the factory at the bottom of the storing furnace;
Step 1105, hydraulic cementing materials modification ash is drawn from the exit end of circular fluid bed;
Step 1106, hydraulic cementing materials modification ash is entered dry dust collection device (as dust precipitator etc.) with flue gas, flue is discharged after by induced draft fan and chimney, and hydraulic cementing materials modification ash is also collected in cooling, storage and homogenizing;
Step 1107, above-mentioned hydraulic cementing materials modification ash is used to produce building material made.
In using method first embodiment to the of the invention described above multicomponent co-combustion agent 11 embodiment, the weight percent of preparing burden into the setting of each component in the multicomponent co-combustion agent by the weight percent set can be major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial calcium chloride 0-20% and barite 0-10%, perhaps major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial residue 0-20% and barite 0-10%.
The technical scheme of using method first embodiment to the 11 embodiment by the above-mentioned multicomponent co-combustion agent of the present invention as can be seen, compared with prior art, the present invention in time gives in the boiler by the thermopositive reaction heat effect of using the multicomponent co-combustion agent generation and has replenished the part heat, alleviated the load impact of coal ash decomposition of components heat dissipation, help burning of coal, improve efficiency of combustion, reduced mechanical incomplete combustion, thereby reduced the carbon content of flyash; Simultaneously, because the adding of co-combustion agent has increased the blackness of flame, improved radiative transfer efficient, the influence of composite factor such as thermopositive reaction thermo-efficiency and fly ash carbon content reduction has in addition obtained the good result that reduces boiler coal consumption; In addition, the use of multicomponent co-combustion agent can also solve the shortcoming of fluidized-bed combustion boiler effectively, makes fluidized-bed combustion boiler reach environmental protection, the energy-conservation and efficient purpose of utilizing of refuse, creates favorable economic benefit, environmental benefit and social benefit.
What deserves to be mentioned is most, the present invention is not doing coal-burning boiler system under the prerequisite of change, in fire coal, add multicomponent co-combustion agent, when guaranteeing system safety operation and normal heat supply generating, realize the purification of combustion of coal, and make that most of sulphur is converted into high value added product in lime-ash that coal combustion produces and the coal in boiler.
The application of the invention multicomponent co-combustion agent, when guaranteeing normal operation of fluidized-bed combustion boiler security of system and heat supply generating, can effectively reduce fly ash carbon content, can realize modification in the flyash stove again, be transformed into hydraulic cementing materials, this hydraulic cementing materials modification ash has purposes widely, fundamentally solves the problem of utilization of fly ash; Simultaneously, use this material further to produce the enterprise of cement, concrete and building material made, not only product cost can reduce significantly, can also enjoy country's tax reduction and exemption preferential policy, obtains extremely strong market competition price advantage.
1. production masonry cement
Gypsum and the 0-15% Portland clinker of this hydraulic cementing materials modification ash admixture 0-5%, but direct production country current standards 12.5,22.5 strength grade masonry cements satisfy the needs of common buildings engineering.
2. produce pulverized fuel ash cement, complex cement
The modification ash that forms through low temperature calcination is high-quality high reactivity hydraulic cementing materials, can be used as the big addition content component of producing flyash or composite Portland cement, the contrast ordinary fly ash, not only addition content can increase substantially, and can improve the cement intensity grade simultaneously.Based on this hydraulic cementing materials modification ash, mix the Portland clinker of a certain amount of (45-55%), add the gypsum of 0-5% again, can produce the flyash or the composite Portland cement of national current standards 32.5 and above strength grade.
3. as the concrete novel constituent materials
This hydraulic cementing materials modification ash can play water-reduction, can strengthen late strength of concrete again, can also solve problems such as concrete cracking, improves concrete impermeability, solidity to corrosion and weather resistance.Satisfying under the condition of concrete strength, can strengthen its incorporation, thereby save cement consumption.This hydraulic cementing materials modification ash can be widely used in construction work and road engineering, is specially adapted to hydro project.
4. production building material made
All Application Areass at ordinary fly ash, such as being used for building material made aspects such as flyash brick, building block, aerated concrete products, haydite, this hydraulic cementing materials modification ash all has tangible application and competitive edge on addition content and product properties.And generally speaking, can not add or add other hydraulic cementing materials such as small amount of cement after using this hydraulic cementing materials modification ash, so just can reduce the production cost of building material made significantly.
The present invention has started the new situation of " multi-use ", both can administer " coal smoke type " pollutes, can save again and reasonable energy utilization, realize the resource utilization recycle of waste, thereby start the road of the economic growth of an ecological benefits type, produce considerable social benefit, economic benefit and environmental benefit.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (12)
1, a kind of multicomponent co-combustion agent is characterized in that, is made up of major ingredient and core material; Wherein, major ingredient comprises any one or arbitrary combination of carbide slag, soda ash slag, unslaked lime or Wingdale; The core material package is drawn together mineralizer, salt fusible dielectric and cinder raising agent.
2, multicomponent co-combustion agent according to claim 1 is characterized in that, described core material package is drawn together wollastonite, gypsum, industrial calcium chloride and barite, perhaps wollastonite, gypsum, industrial residue and barite.
3, multicomponent co-combustion agent according to claim 1 and 2, it is characterized in that, described multicomponent co-combustion agent comprises the moiety of following weight percent: major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial calcium chloride 0-20% and barite 0-10%, perhaps major ingredient 70-95%, wollastonite 0-10%, gypsum 0-10%, industrial residue 0-20% and barite 0-10%.
4, the using method of the described multicomponent co-combustion agent of arbitrary claim among a kind of claim 1-3 is characterized in that, comprising:
Each component of described multicomponent co-combustion agent is carried out fragmentation, batching and grinding;
With multicomponent co-combustion agent behind the grinding and the coal-fired coal charge mixture that forms;
The coal charge mixture burns in boiler and calcines;
Cooling is also collected hydraulic cementing materials modification ash.
5, the using method of multicomponent co-combustion agent according to claim 4, it is characterized in that, the step of each component of described multicomponent co-combustion agent being carried out fragmentation, batching and grinding is specially: with each component fragmentation of multicomponent co-combustion agent, prepare burden into multicomponent co-combustion agent by the weight percent of setting, and be that 0.08 millimeter square hole tails over less than 50% to fineness the multicomponent co-combustion agent grinding.
6, the using method of multicomponent co-combustion agent according to claim 4, it is characterized in that, multicomponent co-combustion agent behind the grinding is specially with the coal-fired step that forms the coal charge mixture: with multicomponent co-combustion agent behind the grinding and fire coal is 1 by weight percentage: 19-2: 8 ratio is mixed, and forms the coal charge mixture.
7, according to the using method of claim 4 or 6 described multicomponent co-combustion agents, it is characterized in that, multicomponent co-combustion agent behind the grinding and the coal-fired step that forms the coal charge mixture be specially:
With multicomponent co-combustion agent behind the grinding and fire coal is 1 by weight percentage: 19-2: 8 ratio sprays into fluidized-bed combustion boiler by the metering feeding device with pneumatic conveying mode;
From the downside bubbling air of described fluidized-bed combustion boiler, drive described multicomponent co-combustion agent and the coal-fired coal charge mixture that under fluidisation and suspended state, forms.
8, the using method of multicomponent co-combustion agent according to claim 4, it is characterized in that the coal charge mixture burns and the incinerating step is specially: the coal charge mixture burns and calcines under 850-1050 ℃ temperature environment in fluidized-bed combustion boiler in boiler.
According to the using method of claim 4 or 8 described multicomponent co-combustion agents, it is characterized in that 9, the coal charge mixture burns and the incinerating step is specially in boiler:
The coal charge mixture burns under 850-1050 ℃ temperature environment in fluidized-bed combustion boiler and calcines, the flyash modified one-tenth hydraulic cementing materials modification ash of finishing fixed desulfurization and will generating;
Hydraulic cementing materials modification ash is drawn from the exit end of fluidized-bed combustion boiler.
10, the using method of multicomponent co-combustion agent according to claim 4, it is characterized in that, after cooling and collecting hydraulic cementing materials modification ash, also comprise: the gypsum and the weight percent that are 0-5% with the grey admixture weight percent of hydraulic cementing materials modification are the Portland clinker of 0-15%, to be used for the masonry cement of direct production country's current standards 12.5 and 22.5 strength grades.
11, the using method of multicomponent co-combustion agent according to claim 4, it is characterized in that, after cooling and collecting hydraulic cementing materials modification ash, also comprise: the Portland clinker and the weight percent that are 45-55% with the grey admixture weight percent of hydraulic cementing materials modification are the gypsum of 0-5%, to be used to produce flyash or the composite Portland cement of national current standards more than or equal to 32.5 strength grades.
According to the using method of claim 4,10 or 11 described multicomponent co-combustion agents, it is characterized in that 12, described hydraulic cementing materials modification ash is used to produce concrete or building material made.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105042600A (en) * | 2015-07-07 | 2015-11-11 | 义马环保电力有限公司 | Treatment method for refuse incineration power plant ash residues and heavy metal and dioxin in medical treatment incineration ash |
| CN105276576A (en) * | 2015-10-20 | 2016-01-27 | 张保森 | Fuel coal desulfurization process |
| CN112920870A (en) * | 2021-01-25 | 2021-06-08 | 安徽省融工博大环保技术材料研究院有限公司 | Biomass straw fuel with incineration ash having gelling property and preparation method and application thereof |
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| CN1143054A (en) * | 1995-08-14 | 1997-02-19 | 中国科学院 | Method, product and equipment for simultanously outputing heat and producing cement chamotte for |
| CN101074402B (en) * | 2006-05-17 | 2010-05-12 | 陈钧 | Efficient sulfur-fixing agent and its usage |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105042600A (en) * | 2015-07-07 | 2015-11-11 | 义马环保电力有限公司 | Treatment method for refuse incineration power plant ash residues and heavy metal and dioxin in medical treatment incineration ash |
| CN105042600B (en) * | 2015-07-07 | 2017-08-04 | 义马环保电力有限公司 | Garbage power plant lime-ash, medical heavy metal in incineration ash, the processing method of dioxin |
| CN105276576A (en) * | 2015-10-20 | 2016-01-27 | 张保森 | Fuel coal desulfurization process |
| CN105276576B (en) * | 2015-10-20 | 2017-11-07 | 张保森 | A kind of coal desulfurization technique |
| CN112920870A (en) * | 2021-01-25 | 2021-06-08 | 安徽省融工博大环保技术材料研究院有限公司 | Biomass straw fuel with incineration ash having gelling property and preparation method and application thereof |
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