CN1051535C - Production of cement by waste gas and dregs from artificial gas - Google Patents
Production of cement by waste gas and dregs from artificial gas Download PDFInfo
- Publication number
- CN1051535C CN1051535C CN96116833A CN96116833A CN1051535C CN 1051535 C CN1051535 C CN 1051535C CN 96116833 A CN96116833 A CN 96116833A CN 96116833 A CN96116833 A CN 96116833A CN 1051535 C CN1051535 C CN 1051535C
- Authority
- CN
- China
- Prior art keywords
- gas
- cement
- gas waste
- flow process
- waste residue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Landscapes
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a process for producing cement from waste gas and waste slag generated by making gas from coal. Waste gas mainly comprises blowing gas of gas making furnaces of ammonia plants, methanol plants and gas plants by using the coal as raw materials, and waste slag is the furnace slag of the gas making furnaces and boilers. A fluidized-bed boiler is used by the present invention, so that the waste slag and the waste gas are sufficiently burnt in a fluidized state bed at 950 to 1100 DEG C for recovering steam, furnace dust in a fluidized bed furnace is led into a rotary kiln for cooling and is mixed with auxiliary materials, and thus, low grade cement is obtained after pulverization. Cement clinker can be calcined by spraying fuel gas in the rotary kiln, and corresponding auxiliary materials are mixed according to the grades of cement products, and thus, the high-grade cement with various grades can be produced. The waste gas and the waste slag are used by the present invention, the production technology of cement can be simplified, and energy consumption and production cost can be reduced.
Description
The present invention relates to a kind of flow process of utilizing coal generating gas waste gas waste residue jointly producing cement, particularly is raw material with the coal, the flow process of the waste gas waste residue jointly producing cement of the ammonia factory of employing steam, air gasification gas making or Methanol Plant, producer gas plant.
The ammonia factory, Methanol Plant and the producer gas plant that with the coal are raw material all need with Gas-making Furnace system gas, and adopt the Gas-making Furnace of air (or oxygen enrichment), steam gasification process to produce a large amount of low-calorie blowing air, at present all as in the exhaust gas emission atmosphere.The CO, the H that contain significant proportion in this blowing air
2, CH
4, H
2Combustiblecomponentss such as S enter in the atmosphere, and both contaminate environment consumes coals again more, only this item, and with regard to the little nitrogenous fertilizer enterprises in the whole nation, the annual standard coals that need consume more than 500,000 tons more.In addition, a large amount of slags of Gas-making Furnace and boiler are lower because of carbon residue, can't remake the fuel utilization, are used for brick and tile for a long time and the ditch of paving the way.Over nearly 2 years, indivedual small nitrogenous fertilizer plants are transformed boiling boiler, and above-mentioned slag reignition in ebullated bed is succeedd, and the waste residue that synthetic ammonia per ton produces can be produced about 1 ton of water vapor, and the part carbon residue is utilized, but ashes are still discarded.According to one's analysis, contain CaO, Al in the gas-making cinder
2O
3, SiO
2, Fe
2O
3Deng cement composition, especially be that the content of CaO can be up to 31-50% in the gas-making cinder of raw material with the carbonated coal balls.This slag is behind above-mentioned boiling boiler burning-off carbon residue, and above composition further concentrates and is present in the ashes of fluidizing furnace, for example is that the ashes analytical data of certain fertilizer plant's boiling boiler of raw material is with the carbonated coal balls: SiO
230.9%, Al
2O
3L8.4%, Fe
2O
33.6%, Ca3 9.8%, all the other are MgO and SO
3Deng oxide compound.The composition of seeing Portland clinker again is: 60-65%C
aO, 20-24%SiO
2, 3-6%Al
2O
3, 2-4%Fe
2O
3, other material≤6%.The two more as can be known, the composition basic symbols Heshui mud requirement of ashes, at present that it is discarded or to handle at a low price be very unfortunate.
The flow process that the purpose of this invention is to provide a kind of coal generating gas waste gas waste residue jointly producing cement is produced steam and cement to make full use of the waste gas waste residue, turns waste into wealth, and reduces coal gas or ammonia, methyl alcohol and Cement Production energy consumption and cost simultaneously greatly.
A boiling boiler is arranged in the flow process of the present invention, comprise air compartment, boiling section, suspension section, the U-shaped burning zone, convection zone, steamdrum, water drum and vapor superheater, coal waste residue (comprising Gas-making Furnace slag and boiler slag) is gone into stove by boiling section, forced air is blown in the stove from air compartment after the gas preheater heating, low calorific value waste gas (comprises Gas-making Furnace blowing air and ammonia, other low calorific value waste gas that discharges in the methanol production process) after pressurization and gas preheater heating, feeds in the stove by boiling section, the combustion gas of high heating value (can be synthetic tower and ammonia, methyl alcohol basin off-gas, producer gas, coal gas etc.) feed in the stove combustion-supporting by boiling section, and control stove internal combustion temperature is in 950-1100 ℃ of scope, the scorching hot ashes of fluidizing furnace feed cement rotary kiln by ash discharging pipe, through cylinder water cooler cooling, add auxiliary material go into ball mill pulverize cement products.Among the present invention, when rotary kiln does not have combustion gas or coal dust feeding, then there is not calcination process, reached the basal component of cement because of the ashes of fluidizing furnace, rotary kiln only plays to be carried and cooling effect, make ashes in the kiln that is rotating gradually cooling send into the monotubular water cooler subsequently and further cool off, mix auxiliary material and promptly get after levigate and hang down the mark cement products.Said auxiliary material is iron, calcium, zirconium monochloride and a small amount of gypsum by the 1-2% metering of cement weight, or mixes calcium nitrite and a small amount of gypsum etc.Occasion for the system cement of high index, need to spray into the high heating value combustion gas to rotary kiln, fuel gas temperature is controlled at 1450-1600 ℃, material calcining is become cement clinker, high-temperature kiln gas is introduced the suspension section or the U-shaped burning zone of fluidizing furnace, and the cement clinker that burns till in the kiln mixes corresponding auxiliary material goal grinding machine according to cement mark and pulverizes after cooling section and the cooling of monotubular water cooler.
The present invention can optionally replenish cement ingredients such as a certain amount of particulate clay, alumina, ferric oxide, unslaked lime according to the needs of waste residue composition and cement type in material, this batching can add in the fluidizing furnace in the lump with waste residue, also can add in the rotary kiln in the lump with the ashes of ash discharging pipe.For keeping the fluidizing furnace operating mode stable, this flow process waste gas add be pressed into gas preheater before, earlier by the cooling tower cooling and feed the gas holder voltage stabilizing.
Among the present invention, fuel should not spray or few Coal powder spray based on the high heating value combustion gas as far as possible in the kiln, because composition such as oxycompound in the ash content that coal dust firing produces, straying quatity can change the interior grog proportioning of kiln when big.
The present invention adopts boiling boiler, and in the fluidized bed, carbon residue in waste residue and the waste gas and combustiblecomponents are able to abundant burning, and the steam of generation can provide to be produced and life vapour.H in the waste gas
2CaO reaction during the S burning and in the waste residue generates CaSO
4, becoming cement ingredient, the CO in the waste gas is also almost burnouted, and has both reclaimed heat, alleviates in the flue gas obnoxious flavour again greatly to atmospheric pollution.Ashes with fluidizing furnace are that base-material is produced cement, only need to add a small amount of clay, CaO, Fe
2O
3Etc. batching, pre-processing devices such as huge raw material storage and raw material are levigate have been saved.The 800 ℃ of pyritous ashes that reach that fluidizing furnace is discharged directly enter rotary kiln, and the ashes sensible heat is reclaimed, and have reduced incinerating energy consumption in the kiln.In this flow process, in fact Gas-making Furnace and fluidizing furnace have played the effect of Wingdale nsp kiln in the cement plant, and rotary kiln has saved preheating section, dryer section and decomposition section, only keep the section of burning till and cooling section, make kiln length reduce 4/5 than conventional cement rotary kiln, diameter also dwindles greatly.SiO in the waste residue
2, Al
2O
3, Fe
2O
3And CaO can generate the active SiO of some amount under the high temperature of fluidizing furnace
2, Al
2O
3, and a spot of C
3A+C
4The AF mineral are by forming cement of high index after the rotary kiln high-temperature calcination.Concerning small ammonia factory, but ammonia by-product GB cement 0.8-1.0 ton per ton.
In sum, the present invention not only utilizes the waste gas waste residue of coal generating gas to produce steam, and ashes are made cement, turns waste into wealth, and has simplified cement production process and equipment greatly.Scorching hot ashes are directly fed rotary kiln and high-temperature kiln gas is introduced fluidizing furnace, a large amount of sensible heats are used appropriately, energy-saving effect is remarkable, and ammonia factory (or Methanol Plant, producer gas plant) adopts this flow process jointly producing cement, can reduce ammonia (or methyl alcohol, coal gas) and Cement Production cost greatly.The cement per ton 80-100 unit that can reduce cost.
Further specify embodiments of the invention below in conjunction with accompanying drawing.
Accompanying drawing is the embodiment schema of ammonia factory waste gas waste residue jointly producing cement.
As shown in the figure, boiling boiler is made up of air compartment 2, boiling section 3, suspension section 4, U-shaped burning zone 5, convection zone 8, steamdrum 7, water drum 9, vapor superheater 6.Batching such as the waste residue a of ammonia factory Gas-making Furnace and boiler and fine-grained clay, alumina, ferric oxide, unslaked lime, fluorite a ' adds boiling section by charging opening 1, the Gas-making Furnace blowing air of ammonia factory (being waste gas) m is cooled to normal temperature through water cooler 22 sprays, feed gas-holder 23 voltage stabilizings, add through blower fan 24 and to be pressed into gas preheater 11 and to be heated to about 200 ℃, feed boiling section 3.Air g goes into gas preheater 11 and is heated to about 200 ℃ after blower fan 20 pressurizations, be blown into air compartment 2, in air distribution plate by boiling section 3 bottoms, the furnace charge that blast cap is blown into boiling section, feed ammonia synthesis off-gas, the contour calorific value fuel gas f of producer gas from boiling section simultaneously.Above-mentioned blowing air m, high heating value combustion gas f and go into waste residue a, the batching a ' mixed burning in the fluidized furnace charge of strong agitation of stove, service temperature is controlled in 950 ℃ of-1100 ℃ of scopes, temperature is crossed low meeting influence the cement quality, the easy coking of the too high then in-furnace dust of temperature slag, to be good, make lime-ash be in the good order and condition of little molten and don't coking near 1050 ℃.The furnace high-temperature flue gas is carried the granule slag secretly, successively through suspension section 4, U-shaped burning zone 5, after arriving convection zone 8, the heat of flue gas is by steamdrum 7, water drum 9, and vapor superheater 6 absorb and greenhouse cooling to 300-400 ℃, flue gas after the cooling continues to feed water heater 10 and gas preheater 11, heat passed to oiler feed c and from the air g of blower fan 20, blowing air m from blower fan 24, part of waste heat is reclaimed, remove fine grit in the flue gas by foam fly-ash separator 12 at last, make simultaneously about flue gas cool-down to 140 ℃, deliver to chimney 13 by induced draft fan 14 and be discharged in the atmosphere.Superheated vapour b is exported for using by pipeline.In U-shaped burning zone 5, insufficiently burnt small-particle slag is separated by scum pipe d
1Fall into boiling section 3 reignition, by the ash discharging pipe d of boiling section 3
2About 800 ℃ of the ashes of discharging, it and convection zone ash discharging pipe d
3A small amount of ash together feed rotary kiln 16, this kiln leading portion section of burning till is longer, the back segment cooling section is very short, simultaneously can be as required, by the prescription requirement of grog, from the certain cement ingredient a ' of charging opening 15 interpolations.Cement ingredient a ' can add in the stove from boiling section charging opening 1, also can add in the kiln from rotary kiln charging opening 15, or the two selects to give birth to adding part batching respectively.It is better that for example unslaked lime adds fluidizing furnace, if but add-on is too much, may influence the operation of foam fly-ash separator 12 and induced draft fan 14, and can all or part of according to circumstances adding rotary kiln.But for being for the ammonia factory of raw material with the carbonated coal balls, owing to contained a large amount of CaO in its slag, therefore added amount of lime is few.In the present embodiment, rotary kiln 16 and monotubular water cooler 17 are integrated (also can as traditional technology the two for chorista), the long 20-25 rice of kiln just reaches requirement, makes the equipment compact.The combustion gas f such as synthesis purge gas of input ammonia factory high heating value can replenish a small amount of coal dust e (good not add as) from coal filling hole 19 in the rotary kiln, and coal dust sprays in the kiln by high heating value combustion gas f, produces 1450-1600 ℃ of flue gas, material in the calcining kiln after the mixed firing.Kiln gas j after the calcining introduces suspension section 4 or U-shaped burning zone 5 from the high side of rotary kiln, to reclaim the kiln gas heat.The cement clinker of discharging from rotary kiln 16 directly enters monotubular water cooler 17 cooling backs from discharge port 18 release grinding machines 21, and according to the requirement of cement type, joins into adulterant and auxiliary material i, and levigate is qualified cement products h.
Claims (10)
1. the flow process of coal generating gas waste gas waste residue jointly producing cement, a boiling boiler is arranged in this flow process, comprise air compartment, boiling section, suspension section, the U-shaped burning zone, convection zone, steamdrum, water drum and vapor superheater, it is characterized in that the coal waste residue goes into stove by boiling section, forced air is blown in the stove from air compartment after the gas preheater heating, low calorific value waste gas through add be pressed into gas preheater heating back by boiling section feeding stove in, the high heating value combustion gas feeds in the stove combustion-supporting and control stove internal combustion temperature in 950 ℃ of-1100 ℃ of scopes by boiling section, the scorching hot ashes of fluidizing furnace feed cement rotary kiln by ash discharging pipe, cool through cylinder, add auxiliary material go into ball mill pulverize cement products.
2. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 1 is characterized in that said auxiliary material is iron, calcium, zirconium monochloride and the gypsum by the 1-2% metering of cement weight.
3. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 1 is characterized in that said auxiliary material is calcium nitrite and gypsum.
4. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 1 is characterized in that spraying in the rotary kiln material in the high heating value gas calcining kiln.
5. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 4 is characterized in that high-temperature kiln gas introduces the suspension section of fluidizing furnace.
6. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 4 is characterized in that high-temperature kiln gas introduces the U-shaped burning zone of fluidizing furnace.
7. according to the flow process of claim 1,2,3,4,5,6 described coal generating gas waste gas waste residue jointly producing cements, it is characterized in that optionally replenishing as required in the material a certain amount of particulate clay, alumina, ferric oxide, unslaked lime cement batching.
8. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 7 is characterized in that said cement ingredient and waste residue add in the fluidizing furnace in the lump.
9. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 7 is characterized in that the ashes of said cement ingredient and ash discharging pipe add in the rotary kiln in the lump.
10. the flow process of coal generating gas waste gas waste residue jointly producing cement according to claim 7 is characterized in that waste gas adds to be pressed into before the gas preheater, earlier by the cooling tower cooling and feed the gas holder voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116833A CN1051535C (en) | 1996-02-02 | 1996-02-02 | Production of cement by waste gas and dregs from artificial gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116833A CN1051535C (en) | 1996-02-02 | 1996-02-02 | Production of cement by waste gas and dregs from artificial gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1136024A CN1136024A (en) | 1996-11-20 |
| CN1051535C true CN1051535C (en) | 2000-04-19 |
Family
ID=5123789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96116833A Expired - Fee Related CN1051535C (en) | 1996-02-02 | 1996-02-02 | Production of cement by waste gas and dregs from artificial gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051535C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101273139B1 (en) * | 2008-09-17 | 2013-06-17 | 에프엘스미쓰 에이/에스 | Rotary kiln for alternative fuels |
| CN107084616B (en) * | 2017-03-30 | 2019-04-12 | 郭树成 | A kind of rotary system manufacturing carbide raw material |
| JP2021505210A (en) | 2017-12-05 | 2021-02-18 | クリスタルモルフィクス テクノロジーズ ピーブイティー．リミテッドＣｒｙｓｔａｌｍｏｒｐｈｉｘ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｖｔ．Ｌｔｄ． | Process for separation of gallate epicatechins (EGCG and ECG) from green tea extract or green tea grounds |
| CN108165686B (en) * | 2018-01-13 | 2019-05-07 | 秦皇岛点知汇科技有限公司 | A kind of drum-type slag granulation and residual neat recovering system |
| CN111423138B (en) * | 2020-04-13 | 2021-11-12 | 河北科技大学 | Method for preparing curing agent by using gas making slag-slag as raw material |
| CN115108740B (en) * | 2022-05-23 | 2023-07-07 | 临沂中联水泥有限公司 | Cement clinker for disposing polluted soil of coking plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102767A (en) * | 1985-04-01 | 1986-09-10 | 中国科学院环境化学研究所 | The moulded coal heating and producing cement chamotte simultaneously |
| CN86105830A (en) * | 1986-07-18 | 1987-03-25 | 汤从心 | Coal ash produces alumina, cement burning novel process |
| CN87108216A (en) * | 1987-12-29 | 1988-12-21 | 天津碱厂 | The method of making cement from ammonia-soda fag-end |
-
1996
- 1996-02-02 CN CN96116833A patent/CN1051535C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102767A (en) * | 1985-04-01 | 1986-09-10 | 中国科学院环境化学研究所 | The moulded coal heating and producing cement chamotte simultaneously |
| CN86105830A (en) * | 1986-07-18 | 1987-03-25 | 汤从心 | Coal ash produces alumina, cement burning novel process |
| CN87108216A (en) * | 1987-12-29 | 1988-12-21 | 天津碱厂 | The method of making cement from ammonia-soda fag-end |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136024A (en) | 1996-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101456690B (en) | Method for preparing active coal gangue | |
| CN100594228C (en) | Integral process for oil shale retorting oil refining and coal-char combustion power generation | |
| CN102464458B (en) | Method and equipment for calcining blending material with high activity by feeding out of kiln head | |
| CN101786809B (en) | Garbage disposal system used in cement dry kiln production and disposal method thereof | |
| RU2498182C2 (en) | Method to produce cement clinker and plant to produce cement clinker | |
| US20220236009A1 (en) | Kiln system and method for firing ceramsite and by-producing waste heat by utilizing raw materials with heating values | |
| CN1078962A (en) | Make the method for cement | |
| SE436760B (en) | PROCEDURE FOR DIRECT REDUCTION OF IRON OXIDE WITH THE REDUCING GAS | |
| CN101428799B (en) | System for producing calcium carbide | |
| CZ850587A3 (en) | Method of obtaining electric power simultaneously with the manufacture of liquid pig iron and apparatus for making the same | |
| CN102363095B (en) | Dry flue gas desulfurization process method and dry flue gas desulfurization system thereof | |
| US4123288A (en) | Calcination | |
| CN1051535C (en) | Production of cement by waste gas and dregs from artificial gas | |
| CN101195522A (en) | Method for calcination of chamotte in rotary cement kiln with coal gas as fuel | |
| GB2182059A (en) | Method and apparatus for producing molten iron using coal | |
| KR101409516B1 (en) | Process for producing sintered ore | |
| CN101122388A (en) | Method and device for making fluid bed to produce super high-temperature fume | |
| CN105084361B (en) | A kind of gas heating multistage calcium carbide reactor and its technique | |
| US20120031307A1 (en) | System and method for manufacturing cement clinker utilizing waste materials | |
| CN105271841A (en) | Rotary kiln device and method for constant temperature indirect calcination of limestone | |
| CN103435041A (en) | Method and system for producing calcium carbide with biomass fuel | |
| US20220112089A1 (en) | Producing Burnt End Products from Natural, Carbonate-Containing, Granular Materials as Starting Raw Materials | |
| CN114735956A (en) | Low-carbon production method and system of cement clinker | |
| JPS649376B2 (en) | ||
| CN204625480U (en) | A kind of rotary kiln device of constant temperature indirect calcination Wingdale |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |