CN1162365C - Method and apparatus for producing high-pressure steam and calcined cement clinker simultaneously with substituted fuel - Google Patents
Method and apparatus for producing high-pressure steam and calcined cement clinker simultaneously with substituted fuel Download PDFInfo
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- CN1162365C CN1162365C CNB021167052A CN02116705A CN1162365C CN 1162365 C CN1162365 C CN 1162365C CN B021167052 A CNB021167052 A CN B021167052A CN 02116705 A CN02116705 A CN 02116705A CN 1162365 C CN1162365 C CN 1162365C
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Abstract
The present invention relates to a method of simultaneously producing high pressure steam and calcined cement clinker in a high temperature boiler and substituting a fuel. A high temperature boiler comprises a fuel oil, or combustion gas, or coal fired boiler, and the temperature of a high temperature zone of the boiler is at least 900 DEG C and is preferably at least 1100DEG C; one kind of cement raw material is added into fuel, and the composition of the cement raw material is based on the purpose of producing cement clinker using dicalcium silicate as an active ingredient. The preground cement raw material and the fuel are uniformly mixed and are in intimate contact, and the mixture is transferred into a boiler chamber for combustion; mineralization reaction occurs among the ingredients of the cement raw material, a great amount of reaction energy is released to substitute the fuel, and the cement clinker is generated and is desulfurized. The present invention also relates to a product prepared by the method and equipment used for carrying out the method.
Description
Technical field
The present invention relates to a kind of alternative fuel, in high-temperature boiler the method for production high pressure steam simultaneously and calcination of cement clinker, relate to the cement clinker that can produce by this method, relate to this method of enforcement and the equipment that designs, relate to the application of this equipment, also relate to the cement that makes by this cement clinker.
Background technology
High-temperature boiler is common heating power supply equipment, and fuel burns in burner hearth, makes the temperature of its high-temperature zone be at least 900 ℃, and the high temperature and high pressure steam that evaporates is supplied to heating power user such as heating power power plant to use for generating.It is more common that high-temperature boiler generally includes fire coal, fuel oil and gas high-temperature boiler; Then often adopt coal-fired high-temperature boiler in the place that coal more easily obtains.Because thermal power generation remains a main mode of electrical production at present, also because the high pressure steam throughput of these high-temperature boilers is big, heat transfer coefficient and thermo-efficiency are all higher, for example for coal-powder boiler, thermo-efficiency can reach 90% or higher, so this three type high temps boiler is widely adopted.
The structure of this three type high temps boiler is basic identical, but with the difference of fuel, to processing, the mode of transport of fuel and some difference of disposal options that excess is burnt in the back of burning, so some difference of the configuration of equipment.For example, pulverized coal firing boiler uses the earliest and is still modal high-temperature boiler, and its main flow process and equipment are seen Fig. 1.As can be seen from Figure 1, coal-powder boiler mainly is made up of following subsystem: raw coal feed proportioning system (comprising 1,2,3), coal powder grinding system (comprising 4,5,6), coal dust supply and the hot system of burning (comprising 7,8,9,10) and by product treatment system (comprising 11,12,13).Key equipment wherein is pulverized coal firing boiler (9).Coal dust is the suspension turbulence state of high dispersing in nozzle sprays into burner hearth, after the high temperature gas flow of furnace combustion zone and 900-1700 ℃ meets, sharply heat up and burn heat release; Coal dust firing and the high temperature and high pressure steam that produces in the boiler can be directly used in promote turbine or other power, Thermal Equipment such as generating set.The mean residence time of coal dust in the burner hearth high-temperature zone is generally 2-10 second, and the flyash of formation leaves burner hearth with flue gas flow.The temperature of flue gas is about 1000-1200 ℃ when leaving burner hearth, enter the ash-laden gas transfer passage, carry out indirect heat exchange with facilities such as steam supply, boiler water supply, air feeds therein, evenly and promptly be cooled to below 200 ℃ in second at 1-5, enter electric precipitator (11) then, flyash promptly is collected.Elsewhere, sink and behind the shrend chilling, draw off by slag removal machine in the slag of burner hearth bottom.The flue gas and the powdered coal cinder of coal dust rapid combustion heat release, generation in boiler cool off rapidly; The flyash of collecting is transported in the heap ashpit of building specially (13) with waterpower usually to be banked up, or stores in bank with air conveying; After a large amount of flyash was removed, the waste gas that still contains a small amount of flyash dust and a certain amount of SO2 entered in the atmosphere.Compare with traditional cement kiln, other coal-fired high-temperature boiler also has similar thermal technology's condition.
The essential structure of coal-fired cyclone furnace and operating process and coal-powder boiler basic identical, just coal dust is not as be suspension turbulence state in burner hearth in the coal-powder boiler, but be subjected to wind-force guiding and make the spiral forward movement along the furnace wall, its mean residence time in 900-1700 ℃ the high-temperature zone in stove is generally about 3-15 second.
The difference of fluid bed furnace and coal-powder boiler mainly is, the fluidization suspension combustion is not coal dust in burner hearth, but certain granules size such as diameter are arranged is the coal particle of 0.6-1.2cm, they successively burn, shell ash until burning fully, and the mean residence time of particle in the burner hearth high-temperature zone is 15-30 minute.
Chain furnace then is to use the coal cinder of large-size, arrives and the slow furnace combustion zone of passing through with the chain conveyor horizontal transmission, and blast roasting burns surplus coal ash and takes burner hearth and the disposal of work back out of with chain conveyor therein.The mean residence time of coal cinder in the burner hearth high-temperature zone was generally 2-5 minute.
For fuel oil and gas fired-boiler, its structure and flow process are just comparatively simple, because wherein no longer need the grinding and/or the prefabricated and e Foerderanlage of coal.Oil fuel or fuel gas take out from the storehouse, and direct pump pressure after metering sprays in the stove through nozzle and to burn, and also no longer needs lime-ash to collect and the back disposal system.
This type high temp boiler has common characteristic and is, the temperature height of its burner hearth high-temperature zone, high-temperature area are big and even; Simultaneously, fuel is shorter from entering into the residence time of leaving the high-temperature zone, the higher and homogeneous combustion (except the chain furnace) of the dispersity in burner hearth.These characteristics can provide very favourable thermal technology's condition for calcination of cement clinker.
On the other hand, cement is one of three big basic materials of building industry.The most frequently used is silicate series cement.Its national standard is seen GB175-1999.
According to a conventional method, the main raw material of conventional cement clinker production is Wingdale, clay and iron powder, and the used fuel of calcination is mainly coal.Mineral composition in the conventional cement clinker mainly is a Calucium Silicate powder, and Dicalcium Phosphate (Feed Grade) wherein is (hereinafter to be referred as C
2S, correspondingly tricalcium silicate then is expressed as C
3S) mineral composition just begins under greater than 1100 ℃ temperature to generate usually, adds behind the mineralizer them in the raw material and generates temperature and also can reduce.The key link of manufacture of cement, no matter any method and kiln type all can be summarized as " two mills one burn ", i.e. the preparation of raw material and grinding, grog calcination and three primary processes of cement grinding.Fig. 2 is an outer predecomposition dry-process rotory kiln process flow diagram of advanced kiln, and wherein the equipment of most critical is the rotary kiln of calcination grog.In grog calcination process, fuel and raw material are gone into kiln respectively, and coal dust sprays in the rotary kiln by nozzles of kiln hood, flame like writing brush head of the position of medullary ray formation, and its thermal-flame can reach 1600-1700 ℃; Mainly conduct heat by convection current and the width of cloth mode of penetrating and pile up the progressive material to rotating to be with kiln, the filling ratio of material in rotary kiln is about 12-14%.Such heat transfer type has two main problems: the one, and thermo-efficiency is low, and is general only about 22%, even the outer predecomposition dry-process rotory kiln technology of advanced kiln, it is about 50% that its total efficiency also just reaches, this causes the bigger waste of fuel value; The secondth, material is stacking states, and it is inhomogeneous to be heated, and causes going into kiln to burning till grog and this process that cools down need be spent the long period from raw material, generally needs 1.5-2 hour approximately, and the outer nsp kiln of kiln is also wanted 40 minutes to 1 hour, and this has embodied " burning slowly " feature; This also causes the grog burning easily.Calcining temperature is very high, calcination is inhomogeneous and the existence of burn-off phenomenon, makes the mineral activity affect adversely, and finally reduces the quality of conventional cement clinker.This all is because in traditional kiln type, it is good inadequately that material cooperates with thermal technology's condition in the kiln, the heat transfer of material and mass transfer or deficiency or excessively cause.Except above-mentioned defective, conventional manufacture of cement is also brought other problem, expends as the round transport of land occupation, fuel, raw material and product, causes the pollution of aspects such as environment such as soil, water source, atmosphere.
Can utilize the favourable condition in the high-temperature boiler to come calcination of cement clinker? Chinese patent application 96111664.1 (the applying date: on August 14th, 1996) this has been carried out useful exploration.Wherein consider the chemical ingredients of chemical ingredients that the coal central gray is contained and mutual ratio and conventional Portland clinker and mutually relatively for approaching, but calcareous composition is these characteristics very little, by mixing a kind of in coal is the co-combustion agent of main component with CaO, replenish lack in the coal ash matter calcareous, so that the chemical element in the burning excess is formed the chemical ingredients of as far as possible approaching conventional Portland clinker, and utilize in the coal-powder boiler favourable thermal technology's condition in " it is cold that speed is burnt speed " characteristic in the process of coal combustion and the burner hearth, make coal incendiary while in stove of having mixed co-combustion agent, make the reaction of solid phase mineralising takes place between coal ash matter and the co-combustion agent composition, in the production high pressure steam, obtain having the active lime-ash of certain hydraulic gelling, simultaneously, the sulphur that contains in the fire coal is also no longer mainly with SO
2Form is discharged in the atmosphere with stack gas, but is bonded in the cement clinker, and desulfurization degree improves greatly.
But this method has three significantly deficiencies; The first, it is only limited in coal-powder boiler implements, because an importance in its inventive concept is to utilize coal ash matter, it is only limited in coal-fired high-temperature boiler implements, and can not implement in fuel oil, gas high-temperature boiler; Second, in order in the such coal firing boiler of coal-powder boiler, to utilize coal ash matter, though it has allocated a kind of co-combustion agent that mainly contains CaO in coal, the element chemistry that burns excess is formed as far as possible to be formed near the element chemistry of silicate cement, to scheme that the mineralising reaction can take place between these elements in burning, generate silicate mineralising material, to go in the stove combustion processes mineralising level of response not high but actual, show that mainly free ca is too high, siliceous and major part calcareous material still is in isolating state, the mineralising reaction is also insufficient, and cindery hydraulic gelation activity is not good as expected; The 3rd, because the mineralising reaction does not fully take place in burner hearth,, do not observe and generate C so mineralising reaction heat does not fully discharge yet
2The mineralising reaction of S can be emitted a large amount of this facts of solid phase mineralising reaction heat, can not be based on the cement slurry material so go into stove incendiary material.But the reason of this three aspect has limited the range of application of disclosed technology in the Chinese patent application 96111664.1.
By long term studies with to the observation analysis of the actual operating state of large-scale coal-fired high-temperature boiler, why discovery does not observe a large amount of mineralising exothermic heat of reaction by No. 96111664.1 disclosed technology of Chinese patent application, be because the less coal ash matter of relative content be with coal in carbon mix, see by carbon component on the whole and wrap up, every one deck carbon-coating, be not easy to take place direct the contact between siliceous and the CaO between it and the CaO that adds.Only burn into CO at carbon-coating
2After just make coal ash matter and CaO have more direct contact may, the chance that the mineralising reaction takes place is just arranged, but burn down Deng carbon-coating, CaO can take place directly to contact with coal ash matter and when reacting, coal dust has almost been used up at the mean residence time of burner hearth high-temperature zone, coal ash matter will begin to leave the high-temperature zone and be cooled, thereby does not possess fully, makes CaO and coal ash matter that the hot conditions that further solid phase mineralising is reacted take place; In addition, the CaO of generation will escape and leave pulverized coal particle, and this escape effect also has the effect that hinders CaO and coal ash matter to come in contact.Generally speaking, the grey matter composition that contains in the CaO that adds and the coal is difficult to take place directly contact, can not make full use of hot conditions C takes place to generate
2The mineralising reaction of S when why this presses No. 96111664.1 patented technologies enforcement with regard to the energy pragmatize, is burnt the calcium contents height that dissociates in the excess, and cindery hydraulic gelation activity is unsatisfactory, and does not observe these several phenomenons of a large amount of mineralising exothermic heat of reaction.
Based on above understanding, the inventor thinks, must change and utilize the inventive concept of coal ash matter as the part of cement slurry.For coal-fired high-temperature boiler, must bypass coal ash matter, in coal directly adding prepared, to generate C
2S is the cement slurry of purpose, so that make each composition in the cement slurry just have close contact going into the stokehold, through with the common grinding of coal evenly after, directly enter or after granulation, enter the high-temperature zone, enough touch opportunities and duration of contact are arranged, thereby C may take place mainly to generate
2The solid phase mineralising reaction of S; And emit a large amount of mineralising reaction heat.For fuel oil and gas high-temperature boiler, not with the problem of coal dust mill, need only the cement slurry grinding is even, go into the stove burning jointly with oil, gas fuel a large amount of solid phase mineralising reactions can take place, emit a large amount of reaction heat energy.At this moment, at calcination of cement clinker in the stove just no longer is only to be a byproduct of coal-fired production high pressure steam as No. 96111664.1 application disclosed methods, also be not limited only to only in coal-powder boiler, just can carry out, but one of two main purposes that all high-temperature boilers can be realized simultaneously.The inventor also finds, by of the present invention go into the stove material if the high-temperature zone temperature reaches more than 900 ℃ in stove, preferred more than 1100 ℃ after, can begin to be initiated burning and the reaction of solid phase mineralising takes place, discharge a large amount of heats.On this basis, the inventor has proposed a kind of novel method, thereby has finished invention.
Summary of the invention
Therefore, an object of the present invention is, a kind of alternative fuel is provided, in high-temperature boiler the method for production high pressure steam simultaneously and calcination of cement clinker, high-temperature boiler wherein is meant that the high-temperature zone of its burner hearth is at least 900 ℃, preferred 1100 ℃ fire coal, fuel oil and gas fired-boiler.
Another object of the present invention is, provides a cover to be suitable for implementing the equipment of the inventive method, and its major portion is said high-temperature boiler.
Another purpose again of the present invention is the cement clinker that can make by method of the present invention to be provided, and to choose wantonly and allocate the cement products that makes behind the cement auxiliary material into.
Another purpose more of the present invention is, provides existing high-temperature boiler in producing by cement clinker of the present invention and/or making by the application in the equipment of the present invention.
Further purpose of the present invention is that a kind of a large amount of reduction SO from the flue gas of high temperature coal boiler emission is provided
2The method of content.
Press one aspect of the present invention, a kind of alternative fuel is provided, the method for production high pressure steam simultaneously and calcination of cement clinker in high-temperature boiler, wherein fuel is sent in the boiler furnace and burnt, make the temperature in its high-temperature zone reach 900 ℃ at least, preferably reach 1100 ℃ at least, the high temperature and high pressure steam that produces flows to the heating power user, it is characterized in that, mix a kind of cement slurry that mainly comprises CaO, aluminium matter composition, irony composition and siliceous composition in fuel, the elementary composition and mutual ratio in the cement slurry will make it approaching as far as possible with C after calcination
2S is the elementary composition and mutual ratio of the cement clinker of main solid phase composition, wherein said cement slurry mix the burning amount be the fuel gross weight 0.25-4 doubly, more preferably 0.6-2 is doubly; Cement slurry want grinding to by 0.080mm sieve tail over less than 15%, preferably less than 10%, be more preferably less than 6% granularity; The cement slurry powder mixed closely and send in the burner hearth with fuel burn, mean residence time in the high-temperature zone is 2 seconds to 30 minutes, preferred 4 seconds to 10 minutes, and more preferably 6 seconds to 6 minutes, make to burn the reaction of solid phase mineralising takes place between the excess composition, generate cement clinker and withdraw from burner hearth.
The cement clinker that withdraws from behind the burner hearth can be cooled to below 200 ℃ rapidly and collects at 1-5 in second.
The consumption of pressing cement slurry of the present invention can be 0.25-4 a times of weight of fuel, and preferred 0.5-2 times, more preferably 0.7-1 doubly.
By also choosing the mineralizer that comprises 2-9 weight % wantonly in the cement slurry of the present invention, the hardening accelerator of 2-9 weight %/thin slag agent.
By method of the present invention better is at 1100-1700 ℃, preferably at 1250-1450 ℃, more preferably carries out under 1300-1400 ℃.
The inventive concept of the inventive method is finding that following true back proposes:
At first, using traditional kiln type of the conventional cement clinker of calcining of raw meal proportionings such as Wingdale, clay such as shaft kiln, rotary kiln to use to account for greatly into the furnace charge total amount is 20% the coal thermal source as calcination of cement clinker.The theoretical hear rate of grog generally fluctuates within 1630-1800KJ/ kilogram grog scope, average out to 1715KJ/ kilogram grog.
Theoretical hear rate is mainly used in drying and goes into the stove material, falls into the free water that contains in the stove material with evaporation; Be used to make clay material to slough crystal water; Be used to make lime carbonate (CaCO
3) be decomposed into CaO+CO
2Deng.And solid phase mineralogical composition mainly is tricalcium silicate (C in the grog
3S), account for more than 55% of grog, from C
2S further absorbs CaO and generates C
3The reaction of S also is thermo-negative reaction.The actual hear rate of grog is much higher than the theoretical hear rate of average out to 1715KJ/ kilogram grog, for example the actual hear rate of Xian Jin predecomposition rotary kiln is about 4187KJ/ kilogram grog, be 2.44 times of its theoretical hear rate, both differ 2472KJ/ kilogram grog, this mainly is that the heat dissipation of kiln causes, and this explanation is having very big potentiality to dig aspect the heat dissipation reducing.When in high-temperature boiler, implementing the inventive method, because following several respects will reduce the actual hear rate of grog greatly:
It is less to go in the stove material free water and crystal water, and the hear rate that be used for dried material, removes moisture has been saved substantially, and slippage is approximately 800KJ/ kilogram grog;
Will be with CaO replaced C aCO
3As the calcium source, this has saved the heat absorption hear rate of about 1990KJ/ kilogram grog;
Speed is burnt the cold operating mode of speed makes the mineral composition of solid phase mineralising reaction generation be mainly C
2S has saved by C
2S generates C
3The heat absorption hear rate of S;
The overall thermal efficiency of high-temperature boiler reaches more than 90%, is much higher than the overall thermal efficiency of traditional kiln, and heat dissipation is lower, can save the overwhelming majority in the heat dissipation 2472KJ/ kilogram grog of traditional kiln.
These several the effect lumps that reduce hear rate are got up, and are not considering by C
2S generates C
3Under the situation of the heat absorption hear rate that S is required, make to generate the required hear rate of per kilogram cement clinker and reduce about 5200KJ at least, also promptly in high-temperature boiler the process of " speed is burnt fast cold " calcination cement clinker not only do not absorb heat generally, be a significant exothermic process on the contrary.
Secondly, according to existing understanding to calcining mechanism, in traditional kiln during the conventional cement clinker of calcining, when going into the stove material to enter temperature be 1100 ℃-1250 ℃ solid phase mineralising exothermic heat of reaction band, C takes place to generate
2The heat release solid state reaction of S etc., liberated heat are enough to make the very fast rising 300-400 of temperature ℃ of this partial material self, and thermal discharge of this explanation solid state reaction is very big.
The 3rd, when in the employed coal-powder boiler of large-scale heat power plant, carrying out commerical test, in coal, mixed when with CaO being a kind of co-combustion agent of main component, incorporation does not wait from 15% to about 30%, at this moment still can keep in the boiler the high underload of steam raising amount constant, burner hearth is not fire extinguishing not only, and in fact combustion position is good.This explanation, mixed this co-combustion agent after, the exothermal effect the when exothermal effect of going into the stove combustionmaterial that contains 15-30 weight % co-combustion agent is equivalent to burning basically and does not add the raw coal of co-combustion agent.
Do not wish to be bound by any theory, the inventor thinks, as if be appreciated that from above-mentioned three facts, if in high-temperature boiler calcination of cement clinker, evaporate moisture content, decompose CaCO except having saved being used in traditional kiln basically into furnace charge
3Outside the contribution of required hear rate and a large amount of these several energy-conservation factors of heat dissipation, the more important thing is, generate C
2S is the main C that avoids generating
3The solid phase mineralising reaction of the activeconstituents of S can discharge a large amount of reaction heat, and the thermal discharge when its thermal discharge and burning equivalent coal is comparable.Therefore, the solid state reaction heat of release can be used as a kind of energy and utilizes, and below is called the reaction energy.Only this reaction can by of the present invention go into the stove material in high-temperature boiler, reach more than 900 ℃, preferred more than 1100 ℃ hot conditions and enough oxygen, the reaction of solid phase mineralising just can take place by cement slurry of the present invention, discharge huge reaction energy, become one of main provider of thermal source in the high-temperature boiler, or even main supplier.
By in the method for the present invention, high-temperature boiler comprises fuel oil, combustion gas and coal-fired high-temperature boiler.It is comparatively simple to implement the present invention in fuel oil and gas high-temperature boiler, because do not burn excess substantially after oil fuel or the fuel gas burning, in CaO, aluminium matter composition, irony composition and the siliceous cement slurry that becomes to be distributed into, makes calcium/silicon than (pressing CaO/SiO
2Meter) be 2: 1-3.0: 1, preferred 2: 1-2.5: 1.With cement slurry grinding in advance, its powder and oil fuel or fuel gas mix going into the stokehold, spray in the stove again, or spray into oil fuel or fuel gas and cement slurry powder in the stove respectively, turbulence mixes in burner hearth, and the hot conditions in the burner hearth is kept in the heat release of burning jointly.The burning excess collects, and promptly is by cement clinker of the present invention.
Coal-fired high-temperature boiler comprises coal-powder boiler, cyclone furnace, fluidized-bed combustion boiler and chain furnace.Incendiary is a coal dust in coal-powder boiler and cyclone furnace, incendiary is granulation in fluidized-bed combustion boiler and the chain furnace coal grain or coal cinder.When in coal-fired high-temperature boiler, implementing the inventive method, main by CaO, aluminium matter composition, irony composition and the siliceous cement slurry that becomes to be grouped into, make its elementary composition and mutual ratio approaching as far as possible with C
2S is the elementary composition and mutual ratio of the cement clinker of main solid phase composition, wherein makes CaO/SiO
2Ratio is 2: 1-3.0: 1, preferred 2: 1-2.5: 1, and grinding is to desired particle size, after in coal, mixing this cement slurry, it is mixed with coal and close the contact taken place, obtain a kind of coal blending powder, under the situation of coal-powder boiler and cyclone furnace, burn directly into stove, the lime-ash that the burning back remains is exactly a cement clinker, collects to be equipped with back usefulness.
Can provide active A l after being included in stove burning by the aluminium matter composition in the cement slurry of the present invention
2O
3Those materials, concrete example includes but not limited to aluminium powder, Al
2O
3And other contains more industrial residue of aluminium and mineral etc.
Include but not limited to iron powder, Fe by the ferrous material in the cement slurry of the present invention
2O
3, the more industrial residue of iron ore and iron content etc.
Include but not limited to shale, silica and siliceous more industrial residue material by the siliceous composition in the cement slurry of the present invention.
Within the scope of the present invention, following term has following given meaning:
" cement clinker " is meant by what the inventive method made to have an active silicates material of hydraulic gelling.
" conventional cement clinker " be meant according to a conventional method, at the cement clinker of conventional kiln as in shaft kiln and rotary kiln, producing.
" cement slurry " is meant the raw material that can make cement clinker by the inventive method.
" coal ash matter " is meant the not volatilizable and non-flammable material composition that contains in the fire coal, and after coal combustion was complete, they left behind with coal ash slag form.
By another aspect of the present invention, a kind of equipment of implementing the inventive method that is specifically designed to is provided, as shown in Figure 3, it comprises:
One cover bunkering and optional homogenization device;
One cover is used for the measuring apparatus of fuel, connects the bunkering device on it, and the raw material after the metering is sent to the cement slurry powder through the e Foerderanlage that connects down and mixed closely and homogenizing;
One cover is used for the storage arrangement of each material composition of cement slurry;
One cover is used for the metering dosage device of each material composition of cement slurry, the storage arrangement that connects on it, and the cement slurry behind the batching is sent to grinding device;
Grinding and the powder sub-sieve and the granularity control device of one cover cement slurry;
One cover mixes homogenization device, it makes from the fuel of fuel metering dosing unit with from the cement slurry powder of cement slurry grinding and granularity control device mixes and homogenizing closely, insert prilling granulator in case of necessity, be formed into the stove batching, and the e Foerderanlage of following access stove batching;
One is inserted in the e Foerderanlage of stove batching, is used for sending into the high-temperature boiler burner hearth and burning going into the stove batching;
One cover high-temperature boiler system comprises a cover fuel burner, a cover vapor generation and a take-off equipment, and
The discharge and the refrigerating unit of one cover ash-laden gas and liquid slag;
One cover electricity gathers dust and slag collection device;
The cement clinker storage arrangement of one cover lime-ash form; With
Optional cement ingredient, grinding, packing, the storage arrangement that inserts of one cover.
Description of drawings
Accompanying drawing 1 is the major equipment and the schematic flow sheet of existing coal-powder boiler.
Accompanying drawing 2 is the outer predecomposition dry-process rotory kiln process flow diagrams of conventional kiln that are used to produce cement clinker.
Accompanying drawing 3 is by the major equipment of the inventive method and the synoptic diagram of flow process.
Accompanying drawing 4 is schematic flow sheets of implementing in coal-powder boiler by an embodiment of the inventive method.
Embodiment
The coal-powder boiler of using with heat power plant is an example below, and some concrete steps and its result when the inventive method is implemented in coal-fired high-temperature boiler are described.
Disclose in the Chinese patent application 96111664.1 and utilized the main material of coal ash matter as calcination of cement clinker, mix again and be mainly CaO and comprise that what is called " AMC " co-combustion agent of a small amount of other auxiliary co-combustion agent such as crystal seed, mineralizer and hardening accelerator etc. forms the coal blending mixture, the method for production high pressure steam simultaneously and cement clinker in coal-powder boiler.Described in its specification sheets, this method is only limited to the utilization to coal ash matter, and three subject matters that wherein will solve are: the chemical constitution that the first, how to make the approaching as far as possible expection cement clinker of chemical constitution of the product of discharging with the lime-ash form from coal-powder boiler; The second, how to make the chemical ingredients generation solid state reaction in the flyash, a large amount of generation has the mineralogical composition of better hydraulically active; The 3rd, how to guarantee that when coal ash matter and each composition generation solid state reaction of co-combustion agent liberated heat when not absorbing coal dust firing to guarantee the burner hearth hot conditions, guarantees that boiler goes out heat energy power and do not reduce.The technical solution that it adopts is, according to the content of coal ash matter and the distribution of chemical ingredients, in coal, allocate a kind of " AMC " into, wherein contain based on the rich calcium substance of CaO and optional other auxiliary co-combustion agent such as crystal seed, mineralizer and hardening accelerator, the consumption of " AMC " will make that CaO content (all representing in CaO%) is 20-70% (based on the weight of the cement clinker that obtains) in the quick-baking cement clinker that obtains after the coal blending mixture burns; With the abundant mixing of this coal blending mixture and levigate, its powder size should reach tailing over less than 30% by the 0.080mm sieve; This coal blending mix powder is sprayed in the burner hearth, it is fully burnt in the high-temperature zone more than 1300 ℃, the mineralising reaction takes place between grey matter simultaneously, obtain cement clinker.
But when in coal-powder boiler, implementing the inventive method, there is the following aspects to be different from the method in the application No. 96111664.1.
-be different from said " AMC " by cement slurry of the present invention;
Those materials of required adding, for example CaO, crystal seed, mineralizer, hardening accelerator etc. when utilizing coal ash matter as the raw material of cement clinker.Total consumption of " AMC " co-combustion agent and wherein the content of each composition to decide according to the content of coal ash matter and the distribution of chemical ingredients so that ash content of coal adds that chemical constitution behind this part co-combustion agent reaches or near with C as far as possible
2S is the chemical constitution of the cement clinker of main active ingredient.
The content of the actual composition that reaches and each composition after table 1 has been listed common coal-fired central gray distributed data and mixed " AMC " co-combustion agent.Ash content accounts for about 15-30 weight % in the coal.
Chemical constitution (weight %) table 1. flyash and that after the adjustment of " AMC " co-combustion agent, expect
| SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | SO 3 | R 2O | Carbon residue | |
| Flyash | 33.9-59.7 | 16.5-35.4 | 1.5-15.4 | 0.8-10.4 | 0.7-1.8 | 0-1.1 | 0.7-3.3 | 1.0-23.5 |
| After the adjustment | 25-30 | 5-12 | 3-5.5 | 50-65 | ＜1 | ＜0.5 | ＜1.2 | ＜3 |
| Conventional cement clinker | 20-24 | 4-7 | 3-3.5 | 62-68 | ＜5 | ＜1.3 |
As seen the composition of the flyash of listing from table 1 and content distribution data only need mainly contain CaO in " AMC " co-combustion agent, to be used to adjust CaO/SiO
2Ratio is to being roughly 2 or slightly high;
And in pressing method of the present invention, do not consider the problem of utilizing of coal ash matter, what add in coal is by cement slurry of the present invention, it is mainly become to be grouped into siliceous by CaO, aluminium matter composition, irony composition, the content of each composition should reach basically as each listed in table 1 fourth line component content scope, but should adjust its CaO/SiO
2Ratio is approximately 2 or slightly high; The consumption of cement slurry can for the 0.25-4 of coal-fired weight doubly between.
Also can choose wantonly by cement slurry of the present invention and to comprise 2-9 weight % mineralizer, the hardening accelerator of 2-9 weight %/cinder raising agent.
---only need ask in its high-temperature zone more than 900 ℃, operate in the preferential coal firing boiler more than 1100 ℃ by method of the present invention;
This coal firing boiler can comprise coal-powder boiler, cyclone furnace, fluid bed furnace and chain furnace, utilize its burner hearth high-temperature zone accessible more than at least 900 ℃, preferred 1100-1700 ℃, more preferably 1250-1450 ℃, 1300-1400 ℃ temperature range most preferably, the mineralising reaction of generation is mainly generates C
2The thermopositive reaction of S is by the CaO/SiO of control material
2Ratio equal or a little more than 2, control reaction temperature is not too high and the residence time generally is no more than 10 minutes and suppresses C as far as possible
2S absorbs CaO and generates C
3The reaction of S.
Fig. 4 implements by the inventive method a schematic flow sheet of production high pressure steam simultaneously and calcination cement clinker in coal dust.
According to Fig. 4, raw coal carries out pre-homogenizing at pre-homogenization yard (13), and is stable to guarantee ature of coal, is metered into transfer roller (3) through raw coal warehouse (1) and Microcomputerized dosing (2); Cement slurry enters its feed bin (15) through its material storage yard (14), sends into the pre-grinding machine of cement slurry (24) through Microcomputerized dosing (16) metering, and then enters transfer roller (3), allocates in the raw coal at this, forms the coal blending mixture; This coal blending mixture enters coal blending mixture pulverizer (4) and mill separator (5), at this grinding to required fineness; The coal blending powder enters cyclonic separator (6), again through coal blending powder warehouse (7) and coal blending powder feeder (8), sends into burning in the burner hearth of coal-powder boiler (9), reaction with wind; Boiler goes out heat and gives heating power user such as generating set 10), ash-laden gas gathers dust through electric precipitator (11), waste gas emptying; And it is collected and enter cement clinker library (12) jointly with the collected cement clinker of dust form with the slag form; But this cement clinker both direct marketing dispatches from the factory, and also can enter the system in the frame of broken lines that choosing inserts, and is mixed with to sell behind the finished cement to dispatch from the factory.System in the frame of broken lines comprise blended material and gypsum feed bin (17), Microcomputerized dosing (18), cement flour grinding machine (19), cement bank (20), cement bulk (21) and dispatch from the factory, sack cement wrapping machine (22), finished cement storehouse (23), packed finished product dispatches from the factory thus.
With Fig. 4 and Fig. 1 contrast as can be known, its flow process major portion and existing coal-powder boiler is basic identical.But by method of the present invention, set up in the flow process: the stockpiling and storing, prepare burden and pre-grinding system of cement slurry; The raw coal pre-homogenization yard; Cancel original ash transfer at the rear portion of flow process and piled grey cell system, set up cement clinker library, also can choose the batching and grinding, packing and the warehousing system that comprise cement wantonly.In addition, with the essentially identical part of original coal-powder boiler equipment in, need to increase the processing power of coal pulverizer, to adapt to the needs that carried out grinding behind the cement slurry to having added, need simultaneously suitably to adjust steel ball matching, to satisfy the requirement of the present invention to fineness of powder; Also need adjust the size and the structural parameter of burner hearth in case of necessity, make powder in burner hearth more than 900 ℃, residence time of preferred high-temperature zone more than 1100 ℃ is no less than 2 seconds, preferably is no less than 4 seconds, more preferably is no less than 6 seconds.The time that makes the coal blending thing enough burnings be arranged and the mineralising reaction takes place like this,, obtain maximum technical economic benefit to satisfy the needs of production high pressure steam simultaneously and calcination cement clinker in the high-temperature zone.
Implement method of the present invention as if utilizing present coal-powder boiler to be used as major equipment, then the still same Fig. 4 of its main flow process.In order to save space, narrate the flow process of each device and material no longer one by one at this.This significant advantage by the equipment of formation after existing installation is undergone technological transformation is, made full use of existing installation, only need a small amount of investment that a few subsystem is transformed, even utilize save, the annual expense that needs the ash transfer of cost and increase enlarging heap ashpit of past, just can be implemented in the purpose that has production high pressure steam simultaneously and calcination cement clinker in the coal-powder boiler now.Another significant advantage is that the sophisticated operation and maintenance experience of existing coal-powder boiler can apply in the inventive method fully, and the serviceability of equipment is good.
Given the cement clinker that obtains by the present invention some new physicochemical characteristics by the method for the present invention's production high pressure steam simultaneously and calcination of cement clinker.By some typical samples are carried out the x-ray diffraction analysis, gained is the result show, shown the x-ray diffraction feature of silicate minerals phase, especially wherein C by cement clinker of the present invention
2S occupies an leading position; Physicals detected result to the cement that made by them shows that this cement has early strength and all high characteristics of intensity in late period simultaneously.This shows that it has with C
2S is the new feature of the belite cement of main active ingredient.
Because the cement slurry that adds in the inventive method can utilize hot conditions in the burner hearth and calcination, the solid state reaction of a large amount of heat releases takes place; Also owing to by the present invention the coal blending mixture is carried out abundant grinding, the fineness that is reached helps the abundant burning of coal.The exothermic effect of these two aspects makes coal consumption significantly to reduce, and coal saving rate can reach 20-80%.
The cement clinker that obtains by the present invention has good hydraulically active, meets the GB175-1999 standard by it as unique activeconstituents or the cement products made as main component (for example it accounts for the 65-95% of cement products gross weight), and its grade reaches 325
#More than, reach 425 preferably
#More than.
Also have good fixed sulphur composition, reduce SO in the stack gas by method of the present invention
2The sweetening effectiveness of content, because when the coal blending mixture burns in the high-temperature zone, the sulphur composition that contains in the coal is easy to react with CaO and other composition, generates calcium sulfate (CaSO
4), anhydrous calcium sulphoaluminate (4CaO 3Al
2O
3CaSO
4) and fluorine sulphur Calucium Silicate powder (3C
2S 3CaSO
4CaF
2) wait mineral substance, make over SO
2Form enters the fixed in large quantities lime-ash of transferring to of atmospheric sulphur with flue gas, becomes the material that gains everything and lose nothing.After testing, sweetening effectiveness can reach 80%.
The present invention has outstanding advantage:
At first, it has opened up the novel process of alternative fuel in high-temperature boiler, production high pressure steam simultaneously and a calcination of cement clinker and desulfurization.By the present invention,, all possesses the primary condition of implementing the inventive method so long as its high-temperature zone reaches more than 900 ℃, preferred high-temperature boiler more than 1100 ℃.Produce now cement clinker and both be not limited in traditional kiln, carry out, also needn't can only utilize coal-powder boiler or cyclone furnace as No. 96111664.1 applications like that, be only limited to the main raw material material of coal ash matter as the production cement clinker is used.By the present invention, all fuel oils, combustion gas and coal-fired high-temperature boiler all can be used for implementing by method of the present invention, and this greatly facilitates and lacks coal and area that oil gas fuel is easy to obtain produces the preparation cement clinker; Even in coal-fired high-temperature boiler, also be not limited to utilize coal ash matter, mix the calcareous raw material that lacks again as calcine cement, it can directly be sent into cement slurry in the high-temperature boiler production high pressure steam simultaneously and be sintered into cement clinker.The cement clinker of producing by method of the present invention has confirmed it is C
2S is the special type cement clinker of the Baily of main active ingredient, and this is a new way of coming production high-quality belite cement with bigger technical scale.
Secondly, can produce the alternative and fuel-saving effect of part of highly significant by the inventive method.Compare with the production technique of the cement clinker of routine, make full use of favourable thermal technology's condition of high-temperature boiler by method of the present invention, utilize between high-temperature field and raw ingredients of cement wherein already present close the contact to cause the mineralising reaction, in case solid state reaction has taken place, then can in burner hearth, discharge a large amount of reaction energy, this reaction can the part alternative fuel the burning heat release, add the high thermal efficiency of this boiler, no longer need decompose CaCO
3And can avoid C
2S continues reaction and generates C
3The heat absorption of S, carbon residue significantly descend the degradation factor, and making conventional cement clinker produce required fuel consumption can save fully.For the method in No. 96111664.1 applications, having broken through wherein " AMC " co-combustion agent by the inventive method forms and mixes the burning amount and can only adapt to this restriction of needs that utilizes coal ash matter, can significantly increase by cement slurry add-on of the present invention, thereby to solid state reaction can utilization ratio increased, correspondingly fuel-saving effect has also increased.
The 3rd, by also greatly decontamination of the inventive method.At first be that pollution in the conventional cement clinker production greatly reduces; Secondly the especially flyash abatement of pollution of coal firing boiler, the SO that in air, discharges
2Amount has reduced widely.This has embodied the comprehensive utilization to the energy and resource, very helps environment protection.
The 4th, have great technology economy advantage by the present invention's method of production high pressure steam simultaneously and calcination of cement clinker in high-temperature boiler.At first be to have saved traditional cement clinker production unit, the manufacturing of high-temperature boiler and operation all have the experience of mature and reliable, and be not only safe but also efficient; Moreover be to have saved traditional cement clinker to produce required fuel consumption, also can save the required part of fuel of high-temperature boiler normal running.Comprehensive this Several Factors, the cost of production unit electric energy and unit weight cement clinker will significantly descend, and have very strong competitive power.
Below in conjunction with embodiment the present invention is carried out more detailed explanation.Should be noted that these embodiment only are used for illustrative purposes, and be not construed as limiting the invention.Those of ordinary skills can be according to the narration of specification sheets, make embodiment of the present invention changing or improving, but these changes or improve all falls within the protection domain that accompanying the present patent application claims are limited.
Present embodiment carries out in the specific equipment that carries out method of the present invention.It is a kind of coal-powder boiler, and its schema is seen Fig. 4.Wherein boiler thorax high-temperature zone temperature can reach 1100-1500 ℃, and the residence time of coal blending mixture in burner hearth is more than 6 seconds.Used coal contains about 15% coal ash matter, and the chemical analysis results of coal ash matter is listed in the table 2.List in table 2 the 4th row by the composition of cement slurry of the present invention, wherein make CaO/SiO
2Ratio be approximately 2.2, the amount of the coal-fired required cement slurry of per kilogram is also listed in the table 2.
Table 2
| CaO | SiO 2 | Al 2O 3 | Fe 2O 3 | Other auxiliary co-combustion agent 3) | Consumption (kilogram) | The MgO+ loss on ignition | |
| Flyash is analyzed | 1.5％ | 63.2％ | 18.0％ | 8.3％ | - | 0.15 | 1.6+4.9 |
| " AMC " co-combustion agent | 85％ | 6％ | - | - | 9％ | 0.29 | |
| By cement slurry of the present invention | 55％ | 25％ | 5％ 1) | 3.5％ 2) | 11.5％ | 0.42 |
1) aluminium powder; 2) iron powder; 3) comprise mineralizer, hardening accelerator/cinder raising agent.
By table 2 data as can be known, the composition and the C of the cement slurry that adds in the per kilogram fire coal
2The composition of S cement slurry is approximate, sees Table the 4th row in 2.When design made the coal non-combustibles total content that is made into reach 40%, the add-on of cement slurry was about 0.42 kilogram, accounted for about 30% of coal blending weight.Owing to do not consider coal ash matter when the preparation cement slurry, after the burning of coal blending thing, original coal ash matter exists as the stopping composition in the cement clinker.
As shown in Figure 4, raw coal behind computer metering is mixed with the cement slurry of sending here from the metering of cement slurry feed bin through pre-grinding, deliver to grinding system and be milled to through 4900 holes/cm
2Tailing over of sieve in little 6% fineness, obtain the coal blending powder, it is blown in the coal-powder boiler burner hearth that designs by the present invention through coal blending powder feeder, with a wind burns, the burning heat release forms and keeps the high-temperature zone about about 1100-1500 ℃, this high temperature causes the reaction of the mineralising between the raw ingredients of cement in the coal blending rapidly, discharges a large amount of mineralising reaction energy.These burning heat releases and the fertile high temperature and high pressure steam of reaction are given the heating power user, and the cement clinker that forms mainly leaves burner hearth with flue gas, be cooled to rapidly within second below 200 ℃ at 1-5, carry out electricity then and gather dust, another part cement clinker then reclaims after shrend is cold with the slag form.In combustion processes, it is shinny to observe burner hearth, illustrates that combustion position is good.This two portions cement clinker is delivered to cement clinker library, get 3 samples at different time and analyze, the composition analysis that obtains the results are shown in table 3.These 3 ripe samples of cement are mixed with 5% gypsum, after cement flour grinding machine grinding, make cement again, its The performance test results is listed in table 4.
Present embodiment carries out on No. 1 stove of Tianjin Chen Tang heat power plant slag tap cyclone furnace, and its evaporated quantity of water is 220 tons/hour.Adopted in the test as embodiment 1 said coal with by cement slurry prescription of the present invention, added 1 kilogram of cement slurry but its add-on is per 1 kilogram of fire coal.Equipment originally is constant, and just grinding arrives through 4900 holes/cm in advance
2Tailing in little 6% cement slurry powder of sieve adds the raw coal conveying belt in proportion, deliver to coal pulverizer grinding together with coal, make it to mix, become the coal blending powder, with pressurized air the coal blending powder is sent into then light a fire, fire box temperature reaches in 900 ℃ the whirlwind tube combustion zone and burns.Under the constant situation of powder-feeding amount before powder-feeding amount is kept and implemented the present invention, find that furnace flame is bright, temperature is than original rising 20-50 ℃, the temperature of high-temperature steam than original some raise, the consumption of desuperheating water increases, the liquid bed drain purge increases greatly, deslagging is smooth.This illustrates that therefore above-mentioned coal blending powder liberated heat when the stove internal combustion has produced the effect of coal saving of highly significant than some increase of original fuel used liberated heat.Collect its ash and slag specimen product, get 3 samples altogether at different time, send to behind the mixing and do the composition analysis, the result is listed as in the table 3.Make cement equally, its performance test results is listed in table 4.
Embodiment 3 (Comparative Examples)
All the other experiment conditions are with embodiment 1, but such by method described in No. 96111664.1 applications, are only limited to the grey matter utilized in the coal raw material as the calcination cement clinker.Only need in the per kilogram fire coal to add as 0.29 kilogram of " AMC " co-combustion agent that table 2 the 3rd is capable listed for this reason, just can make after the coal blending CaO/SiO in the noncombustibles
2Ratio is approximately 2.2.At this moment noncombustibles content is about 34% in the coal blending, and " AMC " co-combustion agent content is about 22.3%.Make this coal blending mixture go into stove burning, collect the cement clinker of ash and slag form then, take a sample to send to and do the composition analysis, obtain that the results are shown in Table 3.Make cement equally, its performance test results is listed in table 4.
The composition analysis result of table 3 cement clinker
| CaO (％) | SiO 2 (％) | Al 2O 3 (％) | Fe 2O 3 (％) | MgO (％) | Loss on ignition (%) | Other (%) | ||
| | 1 | 44.3 | 38.1 | 9.1 | 5.2 | 0.3 | 2.2 | 0.8 |
| 2 | 44.4 | 37.8 | 8.9 | 5.0 | 0.4 | 2.4 | 1.1 | |
| 3 | 42.6 | 39.5 | 9.3 | 5.4 | 0.5 | 1.8 | 0.9 | |
| | 1 | 52.4 | 32.7 | 7.3 | 4.5 | 0.1 | 1.8 | 1.2 |
| 2 | 50.3 | 33.9 | 8.0 | 4.9 | 0.3 | 1.5 | 1.1 | |
| 3 | 49.8 | 34.2 | 8.3 | 4.6 | 0.3 | 1.9 | 0.9 | |
| Embodiment 3 | 59.3 | 26.9 | 6.5 | 3.3 | 0.5 | 2.5 | 1.0 | |
Table 4 cement products Performance Detection data
| Sample | Initial set (time: divide) | Final set (time: divide) | Stability | Folding strength (MPa) | Comfort pressure degree (MPa) | Label | |||||
| 3 | 7 days | 28 days | 3 | 7 days | 28 | ||||||
| Embodiment | |||||||||||
| 1 | 1 | 2:70 | 3:85 | Qualified | 3.4 | 4.6 | 7.1 | 14.1 | 21.0 | 42.8 | 425# |
| 2 | 2:37 | 3:58 | Qualified | 3.6 | 4.8 | 7.3 | 15.8 | 22.3 | 43.1 | 425# | |
| 3 | 3:09 | 4:17 | Qualified | 3.9 | 4.9 | 7.0 | 15.0 | 21.4 | 42.7 | 425 | |
| Embodiment | |||||||||||
| 2 | 1 | 2:15 | 3:36 | Qualified | 4.1 | 5.2 | 7.5 | 19.3 | 29.2 | 44.2 | 425# |
| 2 | 3:06 | 4:23 | Qualified | 3.1 | 3.6 | 6.6 | 16.7 | 18.9 | 41.6 | 325# | |
| 3 | 2:85 | 4:11 | Qualified | 3.4 | 4.4 | 7.4 | 20.7 | 31.3 | 43.8 | 425# | |
| Embodiment 3 | 3:25 | 4:41 | Qualified | 3.0 | 3.5 | 6.4 | 13.8 | 16.8 | 38.4 | 325# | |
Claims (21)
1, a kind of alternative fuel, in high-temperature boiler the method for production high pressure steam simultaneously and calcination of cement clinker, wherein fuel is sent in the boiler furnace and burnt, make the temperature in its high-temperature zone reach 900 ℃ at least, the high temperature and high pressure steam that produces flows to the heating power user, it is characterized in that, in fuel, mix the cement slurry of a kind of CaO of comprising, aluminium matter composition, irony composition and siliceous composition, its add-on is 0.25-4 a times of firing rate, and the elementary composition and mutual ratio in the cement slurry will make it approaching as far as possible with C after calcining
2S is the elementary composition and mutual ratio of the cement clinker of main solid phase composition; Make cement raw meal be milled to the granularity of tailing over less than 15% by 0.080mm sieve; Cement slurry mixed closely and send in the burner hearth with fuel burn, the mean residence time in the high-temperature zone is 2 seconds to 30 minutes, makes the mineralising reaction takes place between the raw ingredients of cement, produces cement clinker and collects.
2, by the method for claim 1, it is characterized in that, after the cement clinker of generation withdraws from burner hearth, be cooled to rapidly below 200 ℃ in second at 1-5.
3, by the method for claim 1, it is characterized in that the temperature in the said high-temperature zone is 1100-1700 ℃.
4, by the method for claim 3, it is characterized in that the temperature in the said high-temperature zone is 1250-1450 ℃.
5, by the method for claim 4, it is characterized in that the temperature in the said high-temperature zone is 1300-1400 ℃,
By the method for claim 1, it is characterized in that 6, said cement raw meal is milled to the granularity less than 10% of tailing over by the 0.080mm sieve.
By the method for claim 6, it is characterized in that 7, said cement raw meal is milled to the granularity less than 6% of tailing over by the 0.080mm sieve.
8, by the method for claim 1, it is characterized in that the mean residence time in the high-temperature zone is 4 seconds to 10 minutes.
9, by the method for claim 8, it is characterized in that the mean residence time in the high-temperature zone is 6 seconds to 6 minutes.
By the method for claim 1, it is characterized in that 10, the add-on of cement slurry is 0.5-2 a times of firing rate.
By the method for claim 10, it is characterized in that 11, the add-on of cement slurry is 0.7-1 a times of firing rate.
By the method for claim 1 or 2, it is characterized in that 12, said high-temperature boiler is selected from oil-firing boiler, gas fired-boiler and coal-fired coal-powder boiler, cyclone furnace, fluid bed furnace and chain furnace.
13, by the method for claim 1, it is characterized in that, contain the mineralizer of 2-9 weight % in the cement slurry, 2-9 weight % hardening accelerator/thin slag agent.
14, a kind of cement clinker, it makes according to each method among the claim 1-13.
15, a kind of cement, it be with by the cement clinker of claim 14 and optional hardening accelerator or the conventional Portland clinker of 5-30% of mixing as activeconstituents, add conventional cement auxiliary material again, make through grinding.
16, by the cement of claim 15, it is characterized in that said conventional cement auxiliary material is a gypsum.
17, a kind of alternative fuel, in high-temperature boiler the equipment of production high pressure steam and calcination of cement clinker, it comprises:
One cover bunkering and optional homogenization device;
One cover is used for the measuring apparatus of fuel, connects the bunkering device on it, and the raw material after the metering is sent to the cement slurry powder through the e Foerderanlage that connects down and mixed closely and homogenizing;
One cover is used for the storage arrangement of each material composition of cement slurry;
One cover is used for the metering dosage device of each material composition of cement slurry, the storage arrangement of each material composition in its upper accepting water mud raw material, and the cement slurry behind the batching is sent to grinding device;
The one cover pre-grinding of cement slurry and powder sub-sieve and granularity control device;
One cover mixes homogenization device, it makes from the fuel of fuel metering dosing unit with from the cement slurry powder of pre-grinding of cement slurry and granularity control device mixes and homogenizing closely, insert prilling granulator in case of necessity, be formed into the stove batching, and the e Foerderanlage of following access stove batching;
One is inserted in the e Foerderanlage of stove batching, is used for sending into the high-temperature boiler burner hearth and burning going into the stove batching;
One cover high-temperature boiler system comprises a cover fuel burner, a cover vapor generation and a take-off equipment, and the discharge refrigerating unit of a cover ash-laden gas and liquid slag;
One cover electricity gathers dust and slag collection device;
The cement clinker storage arrangement of one cover lime-ash form; With
Optional cement ingredient, grinding, packing, the storage arrangement that inserts of one cover.
18, by the equipment of claim 17, it is characterized in that said high-temperature boiler is a coal-powder boiler, said fuel is coal; Raw coal carries out pre-homogenizing at pre-homogenization yard (13), and is stable to guarantee ature of coal, is metered into transfer roller (3) through raw coal warehouse (1) and Microcomputerized dosing (2); Each material composition enters its feed bin (15) through its material storage yard (14) in the cement slurry, sends into the pre-grinding machine of cement slurry (24) and then enters transfer roller (3) through Microcomputerized dosing (16) metering, allocates in the raw coal at this, forms the coal blending mixture; This coal blending mixture enters coal blending mixture pulverizer (4) and mill separator (5), at this grinding to required fineness; The coal blending powder enters cyclonic separator (6), again through coal blending powder warehouse (7) and coal blending powder feeder (8), sends into burning in the burner hearth of coal-powder boiler (9), reaction with wind; Boiler goes out heat and gives the heating power user (10), and ash-laden gas gathers dust through electric precipitator (11), waste gas emptying; And it is collected and enter cement clinker library (12) jointly with the collected cement clinker of dust form with the slag form; But this cement clinker both direct marketing dispatches from the factory, and also can be mixed with to sell behind the finished cement to dispatch from the factory.
19, by the equipment of claim 18, it is characterized in that said heating power user is a generating set.
20, press the equipment of claim 18, it is characterized in that, be mixed with the used system of finished cement comprise blended material and gypsum feed bin (17), Microcomputerized dosing (18), cement flour grinding machine (19), cement bank (20), cement bulk (21) and dispatch from the factory, sack cement wrapping machine (22), finished cement storehouse (23), packed finished product dispatches from the factory thus.
21, existing fire coal, fuel oil and gas high-temperature boiler are being made by the application in each described equipment among the claim 17-20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021167052A CN1162365C (en) | 2001-04-27 | 2002-04-26 | Method and apparatus for producing high-pressure steam and calcined cement clinker simultaneously with substituted fuel |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01117156.1 | 2001-04-27 | ||
| CN01117156 | 2001-04-27 | ||
| CNB021167052A CN1162365C (en) | 2001-04-27 | 2002-04-26 | Method and apparatus for producing high-pressure steam and calcined cement clinker simultaneously with substituted fuel |
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| Publication Number | Publication Date |
|---|---|
| CN1384075A CN1384075A (en) | 2002-12-11 |
| CN1162365C true CN1162365C (en) | 2004-08-18 |
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| CN104353348B (en) * | 2014-10-16 | 2017-02-15 | 信丰县包钢新利稀土有限责任公司 | Dry method desulfurizing agent containing rare earth |
| CN114545866A (en) | 2020-11-11 | 2022-05-27 | 台泥资讯股份有限公司 | Method for controlling coal consumption system |
| TWI824333B (en) * | 2020-11-11 | 2023-12-01 | 臺泥資訊股份有限公司 | Method of control system controlling nitrogen oxides and ammonia water in selective non-catalytic reduction system |
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