CN1778752A - Method for firing cement from urban refuse - Google Patents
Method for firing cement from urban refuse Download PDFInfo
- Publication number
- CN1778752A CN1778752A CN 200410060278 CN200410060278A CN1778752A CN 1778752 A CN1778752 A CN 1778752A CN 200410060278 CN200410060278 CN 200410060278 CN 200410060278 A CN200410060278 A CN 200410060278A CN 1778752 A CN1778752 A CN 1778752A
- Authority
- CN
- China
- Prior art keywords
- cement
- domestic waste
- incinerator
- rubbish
- stove
- 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.)
- Granted
Links
Images
Abstract
A method for baking cement from urban domestic refuse is carried out by arranging refuse incinerator at cement pre-decomposition kiln system, incinerating refuse by hot air from cement clinker cooler, and delivering hot smoke produced by incinerating refuse into decomposition furnace as hot energy for decomposing cement green stock. It is cheap and harmless, has rational design and no second environmental pollution.
Description
Affiliated technical field
The invention belongs to the harmless treatment and the Cement industry commercialization Application Areas of domestic waste, what relate generally to is a kind of method of domestic waste cement baking.
Background technology
The state-of-the-art method of current domestic and international processing domestic waste is the method for burning away the refuse and generating electricity.This method can be utilized the flammable matter heating generating of rubbish, but the problem that exists is: can not utilize containing 70% non-flammable matter (being the ashes of rubbish) in the rubbish approximately, cause secondary pollution; The obnoxious flavour that produces of burning away the refuse needs specialized system and equipment to handle, and invests huge.
Summary of the invention
Purpose of the present invention promptly produces thus, proposes a kind of method of domestic waste cement baking.This method organically combines the burning disposal of Cement Production and domestic waste, utilize existing nsp kiln cement producing line to realize, recycling treatment innoxious to domestic waste, utilize the flammable matter of rubbish to burn baking cement clinker simultaneously, and can be with the rubbish ashes as Cement Production raw material and mixing material.
For achieving the above object, the technical scheme that the present invention takes is: in existing cement nsp kiln system incinerator is set, this incinerator utilizes the hot blast of cement clinker cooler that rubbish is burned, and the hot flue gas that waste incineration produces is sent into the heat energy that decomposing furnace decomposes as cement slurry.
Incinerator of the present invention is made of suspension combustion stove and rotary type incinerator, the suspension combustion stove is vertical setting, its upper end is provided with garbage inlet and venting port, inside has two combustion chambers up and down, the connection position of these two combustion chambers is a throat structure, is provided with the material distributing cone of hierarchal arrangement in two combustion chambers up and down; The rotary type incinerator is horizontal setting, drives rotation by drive unit, and the one end is communicated with the bottom of suspension combustion stove, and the other end is provided with stove tail sealing device, blast inlet and the outlet of rubbish ashes, is evenly equipped with material delivering plate in it.
The present invention utilizes existing nsp kiln cement producing line that domestic waste is carried out harmless treatment, not only can utilize the flammable matter of rubbish to burn baking cement clinker, but also can utilize whole ashes to make cement raw material and mixing material, avoid secondary pollution, thereby also utilize the alkaline environment of cement clinker firing system to come the sour gas for the treatment of refuse burning generation to realize the innoxious of refuse treatment simultaneously.For innoxious, the recycling treatment of domestic waste provides a good solution, reduced the cost of the processing cost and the manufacture of cement of domestic waste simultaneously.
The present invention has better social benefit and economic benefit.
The saving investment of founding the factory: the investment of founding the factory in day 1200 tons of (medium-sized city domestic refuse day output) cement mill for the treatment of refuse is about 1/3rd of the investment of founding the factory of equal processing power power station.
The direct economic benefit of domestic refuse is burnt in the cement mill: the cement mill of handling 1200 tons of domestic refuses with day is an example.Its scale is for producing 1000000 tons of cement per year, and rubbish is for coal, and for clay, for mixing material and four totals of nonmetal recovery, the cement mill can have a net increase of 15,000,000 yuan of profits every year.
The present invention has not only made full use of the potential value of rubbish, and has solved the pollution problem of rubbish preferably.Specific as follows:
1, the utilization of the potential heat of rubbish
The component of medium-sized city such as this city rubbish is similar as shown in table 1 to the waste component of national big and medium-sized cities.
The component (%) of table 1 this city domestic refuse
| Animals and plants | Dirt | Brick and tile | The scraps of paper | Plastics | Fabric | Glass | Metal-impregnated wood | Other |
| 7.44 | 74.63 | 8.54 | 0.95 | 5.75 | 0.43 | 0.70 | 0.59 | 0.96 |
The calorific value of rubbish is 5746 kilojoule per kilogram, and the hear rate of cement clinker is about 3600 dried Jiao/kilograms, says that generally the calorific value of rubbish is not less than the value that 4180 kilojoule per kilogram just have burning recovery heat energy.Along with people's living standard improves constantly, the calorific value of rubbish also constantly increases, and its combustion heat utility value is bigger.
2, the utilization of rubbish ashes
The chemical constitution of rubbish ashes is similar to chainotte, as the chemical constitution of this city rubbish ashes by shown in the table 2.
Table 2 this city rubbish ashes chemical constitutions (%)
| Material | Loss on ignition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | Cl | Moisture |
| Ashes | 2.18 | 62.78 | 14.52 | 7.08 | 10.80 | 2.63 | 0.25 | ------ |
| Clay | 6.01 | 67.28 | 13.14 | 5.15 | 4.68 | 0.69 | 15.0 | |
| Coal gangue | 9.60 | 60.56 | 16.70 | 4.84 | 2.72 | 0.98 | 5.4 |
The rubbish ashes can be made cement clayey raw material and mixing material as can be known from the above table.Concrete technical situation is as follows:
The rubbish ashes are made the cement clayey raw material.
Three kinds of raw materials of the general use of manufacture of cement are Wingdale, clay and iron powder.When using the rubbish ashes for raw clay, for meet requirement that cement clinker forms often needs increase correction material, form 4 kinds of feed proportionings.It is lower to compare SiO2 content with clay as the composition of Luoyang City's rubbish ashes, need add siliceous correction material sandstone when batching, becomes four kinds of feed proportionings promptly: Wingdale, rubbish ashes, sandstone and iron powder.
The rubbish ashes are made cement additive.
The composition of rubbish ashes is similar to chainotte, and it belongs to calcareous addition of volcano, meets the national standard technical requirements of (GB/T2847---1996 are used for the pozzolana mixed material of cement) as Luoyang City's rubbish ashes, and is as shown in table 3
Table 3 Luoyang City rubbish ashes and national standard technical requirements are relatively
| Project | The GB required value | Rubbish ashes value | Meet GB |
| Loss on ignition (%) | ≤10 | 2.18 | Meet |
| SO3(％) | ≤3.0 | 2.19 | Meet |
| The volcanic ash test | Qualified | Qualified | Meet |
| 28 days compressive strength rates (%) of cement mortar | ≥62 | 82.8 | Meet |
3, the processing of the pollutent in the flue gas of refuse burning
After the waste incineration, it can be divided into particulate matter, sour gas, heavy metal and organic pollutant four big classes according to the different in kind of pollutent in the flue gas.Utilize the method for existing this four pollutant of cement nsp kiln system handles as follows:
(1) processing of particulate matter:
Particulate matter comprises the flying dust that dust and waste incineration produce, and its composition is similar to the rubbish ashes, is collected into kiln and raw material jointly by calcination of cement clinker by the next stage whirlwind tube of kiln tail.
(2) processing of sour gas
The sour gas that waste incineration produces comprises hydrogenchloride (HCl), oxysulfide (Sox), oxynitride (NOx), hydrogen fluoride and carbon monoxide.
HCl, HF, the processing of SOx
Cement nsp kiln system is an alkaline environment that calcium oxide content is higher, can also spray liming and sour gas HCl in kiln tail conditioning tower as required simultaneously, HF, and neutralization reaction takes place and makes it processed in Sox.Its chemical equation is as follows:
The calcium salt of the processed formation of these sour gas is useful to cement.As CaF2 is the mineralizer that burning clinker of cement is used, and vitriol not only can be made mineralizer but also play retardant in cement.CaCl2 plays hardening accelerator in cement.
The processing of NOx:
NOx is meant NO, the mixed gas of NO2, and wherein the former is harmless.The formation temperature of NOx 〉=1200 ℃ are so the NOx content of the about 1000 ℃ of discharging garbage incinerator smokes of the temperature of incinerator is very low.
The processing of CO:
CO is because of due to the incomplete combustion, the O in the time of therefore should guaranteeing incineration firing
2Content, temperature, the granularity of rubbish and dispersity thereof can make rubbish fully burn, and reduce the content of CO as far as possible.
(3) processing of organic pollutant
Organic pollutant comprises deleterious two Evil English, furans, germ and other organism.Their main ingredient is a carbon, hydrogen, and oxygen, one has burnt it.Will decompose and burn when temperature surpasses 850 ℃ in incinerator, formation sour gas and moisture, entering then that cement slurry decomposing furnace and follow-up equipment be utilized is harmless treatment.
(4) processing of heavy metal
Waste incineration form heavy metal and compound such as mercury, lead, cadmium and other heavy metals and their compound.Heavy metal and compound thereof at high temperature evaporate in incinerator, enter the cement slurry decomposing furnace, can be burnt till grog and enter cement attached to going into kiln on the raw material behind preheater and the follow-up equipment, and its amount is very little.They are cured in the concrete and by harmless treatment in the application of cement.
Description of drawings
Accompanying drawing 1 is the structural representation of incinerator of the present invention.
Among the figure: 1, venting port, 2, garbage inlet, 3, the suspension combustion stove, 4, material distributing cone, 5, throat structure, 6, base plate, 7, stove head seal device, 8, material delivering plate, 9, the rotary type incinerator, 10, support roller, 11, drive unit, 12, stove tail sealing device, 13, burner, 14, blast inlet, 15, rubbish ashes outlet, 16, the ashes cooler.
Embodiment
In conjunction with the accompanying drawings, it is as follows to provide embodiments of the invention:
As shown in the figure: present embodiment is provided with incinerator on existing nsp kiln cement producing line, and this incinerator is made up of suspension combustion stove 3 and rotary type incinerator 9 two portions, and these two portions are tightly connected by stove head seal device 7.Rotary type incinerator 9 is circular cylinder bodies of steel, and suspension combustion stove 9 is horizontal inclined angle setting relatively, and its horizontal tilt is 3-5%, by support roller 10 supportings.Cylindrical shell is provided with the drive unit 11 that drives the cylindrical shell rotation, its low side (burner) is provided with stove tail sealing device 12, blast inlet 14, the outlet 15 of rubbish ashes and burner 13 (can spray into oil or coal dust to keep furnace temperature in stove, guarantee the trouble-free burning of rubbish), it is communicated with blast inlet 14 with cement clinker cooler on the cement producing line, exports 15 positions at the rubbish ashes and is provided with discharging air valve and ashes cooler 16.Material delivering plate 8 (material delivering plate is respectively with 60 degree, and 90 spend, and the forms at 120 degree angles are arranged circumferentially) is housed in stove, and the stove inwall is equipped with refractory materials, lagging material and liner plate.Suspension combustion stove 3 is vertical setting, and its profile is square (or circular) cylindrical shell of a steel, and the top is provided with venting port 1 and garbage inlet 2, and venting port 1 is connected with the cement slurry decomposing furnace, and garbage inlet 2 positions are provided with air valve.The connection position that its inside has up and down two combustion chambers and 6, two combustion chambers of base plate is a throat structure 5, is provided with the material distributing cone 4 of hierarchal arrangement in two combustion chambers up and down, and the arrangement of material distributing cone 4 is from top to bottom increase successively each combustion chamber in.Base plate 6 be positioned at the combustion chamber below, it is the angle of inclination and is provided with, effect is that unburnt rubbish is imported in the rotary type incinerator 9 smoothly.Suspension combustion stove 3 can be a monotubular, also can be the combination of two or four monotubulars, and its top and bottom connection are got final product.
The working process of present embodiment is as follows: rubbish is entered by the garbage inlet of suspension combustion furnace roof portion through pre-treatment (reject metal, bulk is separated and be broken) back, from the hot blast (700---800 ℃) of cement clinker cooler, i.e. " tertiary air ".Tertiary air is from the low side of rotary type incinerator, promptly " burner " enters and the rubbish move toward one another, in being dispersed in the hot flue gas of rising, material distributing cone carries out drying, burning, the bulk rubbish that has not been suspended drop to reducing place by the effect of spurting of hot flue gas will be wherein lightweight blow go back to the chamber, heavy falls into down the chamber to be disperseed once more, drying, burning.Unburnt rubbish enters in the rotary kiln to be taken up to be evenly dispersed in by the material delivering plate in the stove and burns away in the hot gas flow until after-flame, and the hot flue gas that burning produces escapes and enter the decomposition that decomposing furnace is used to cement slurry from the top of shower furnace.Its ashes (loss on ignition≤10%) are admitted to pre-homogenization yard, after homogenizing, be admitted to the feed proportioning station again with Wingdale, go into after sandstone, iron powder cooperate raw mill be prepared into raw material or go into the blended material storehouse again with cement clinker, gypsum fits into cement grinding mill, makes cement.Go into incinerator from the tertiary air (700-800 ℃) of cement clinker cooler and burn away the refuse and form about 1000 ℃ flue gas and go into cement raw material decomposing furnace the lime carbonate in the raw material is decomposed, again through preheater, conditioning tower, electric precipitator enters atmosphere after purifying.
Claims (8)
1, a kind of method of domestic waste cement baking, it is characterized in that: the present invention is provided with incinerator in existing nsp kiln cement system, this incinerator utilizes the hot blast of cement clinker cooler that rubbish is burned, and the hot flue gas that waste incineration produces is sent into the heat energy that decomposing furnace decomposes as cement slurry.
2, the method for domestic waste cement baking according to claim 1, it is characterized in that: described incinerator is made of suspension combustion stove (3) and rotary type incinerator (9), suspension combustion stove (3) is vertical setting, its upper end is provided with garbage inlet (2) and venting port (1), inside has two combustion chambers up and down, the connection position of these two combustion chambers is a throat structure (5), is provided with the material distributing cone (4) of hierarchal arrangement in two combustion chambers up and down; Rotary type incinerator (9) is horizontal setting, drive rotation by drive unit (11), the one end is communicated with the bottom of suspension combustion stove, and the other end is provided with stove tail sealing device (12), blast inlet (14) and rubbish ashes outlets (15), is evenly equipped with material delivering plate (8) in it.
3, the method for domestic waste cement baking according to claim 1 is characterized in that: described rotary type incinerator (9) is provided with burner (13).
4, the method for domestic waste cement baking according to claim 1 is characterized in that: described rotary type incinerator (9) suspension combustion stove (3) relatively is horizontal inclined angle setting, and its horizontal tilt is 3-5%.
5, the method for domestic waste cement baking according to claim 1 is characterized in that: the hierarchal arrangement of material distributing cone (4) is from top to bottom in described suspension combustion stove (3) inner combustion chamber successively increases.
6, the method for domestic waste cement baking according to claim 1 is characterized in that: the material delivering plate (8) in the described rotary type incinerator (9) is respectively with 60 degree, and 90 spend, and 120 degree square rings are to setting.
7, the method for domestic waste cement baking according to claim 1 is characterized in that: described suspension combustion stove (3) can be a monotubular, also can be the combination of two or four monotubulars.
8, the method for domestic waste cement baking according to claim 1 is characterized in that: the hot blast of described cement clinker cooler is 700---800 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100602784A CN100369848C (en) | 2004-11-20 | 2004-11-20 | Method for firing cement from urban refuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100602784A CN100369848C (en) | 2004-11-20 | 2004-11-20 | Method for firing cement from urban refuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1778752A true CN1778752A (en) | 2006-05-31 |
| CN100369848C CN100369848C (en) | 2008-02-20 |
Family
ID=36769220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100602784A Expired - Fee Related CN100369848C (en) | 2004-11-20 | 2004-11-20 | Method for firing cement from urban refuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100369848C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102302891A (en) * | 2010-12-30 | 2012-01-04 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by incineration by using dual-purpose reactor |
| CN102302892A (en) * | 2010-12-30 | 2012-01-04 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by high temperature waste incinerator by using dual-purpose reactor |
| WO2012100618A1 (en) * | 2011-01-28 | 2012-08-02 | 圣达瀚科技有限公司 | A method of disposing waste gas using double-effect-reactor combined with cement production and a system thereof |
| WO2015161560A1 (en) * | 2014-04-24 | 2015-10-29 | 尹小林 | Refuse incineration treatment device and power generation method using refuse incineration |
| CN108019764A (en) * | 2016-11-02 | 2018-05-11 | 天津天控科技有限公司 | A kind of sludge incineration device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103856A (en) * | 1994-09-22 | 1995-06-21 | 范茂潮 | Method for producing cement by using garbage as raw material |
| CN1247841A (en) * | 1999-09-29 | 2000-03-22 | 陈华魁 | Cement baking process in kiln with dry preheater by using city garbage as material |
| JP2002255601A (en) * | 2001-02-23 | 2002-09-11 | Ishikawajima Harima Heavy Ind Co Ltd | Cement raw material calcination furnace using solid waste |
-
2004
- 2004-11-20 CN CNB2004100602784A patent/CN100369848C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102302891A (en) * | 2010-12-30 | 2012-01-04 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by incineration by using dual-purpose reactor |
| CN102302892A (en) * | 2010-12-30 | 2012-01-04 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by high temperature waste incinerator by using dual-purpose reactor |
| WO2012089089A1 (en) * | 2010-12-30 | 2012-07-05 | 圣达瀚科技有限公司 | Method using dual process reactor for processing flue gas from high temperature waste incinerator, and system thereof |
| WO2012089083A1 (en) * | 2010-12-30 | 2012-07-05 | 圣达瀚科技有限公司 | Method using dual process reactor for processing incineration flue gas, and a system thereof |
| CN102302892B (en) * | 2010-12-30 | 2013-05-22 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by high temperature waste incinerator by using dual-purpose reactor |
| CN102302891B (en) * | 2010-12-30 | 2013-08-14 | 圣达瀚科技有限公司 | Method and system for treating flue gas generated by incineration by using dual-purpose reactor |
| US8728421B2 (en) | 2010-12-30 | 2014-05-20 | Satarem Technologies Limited | Method for the treatment of exhaust gas produced by high-temperature waste incinerator with a dual-purpose reactor and the system thereof |
| WO2012100618A1 (en) * | 2011-01-28 | 2012-08-02 | 圣达瀚科技有限公司 | A method of disposing waste gas using double-effect-reactor combined with cement production and a system thereof |
| US8795616B2 (en) | 2011-01-28 | 2014-08-05 | Satarem Technologies Limited | Method for the treatment of waste gas with a dual-purpose reactor integrated within cement production facility and the system thereof |
| WO2015161560A1 (en) * | 2014-04-24 | 2015-10-29 | 尹小林 | Refuse incineration treatment device and power generation method using refuse incineration |
| CN108019764A (en) * | 2016-11-02 | 2018-05-11 | 天津天控科技有限公司 | A kind of sludge incineration device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100369848C (en) | 2008-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101182142B (en) | Method for calcining cement by carbide slag replacing whole limestone | |
| CN102206091B (en) | Method for making ceramsite by using sludge | |
| CN101386480B (en) | Method for producing portland cement clinker using domestic waste incineration residue | |
| CN100556840C (en) | Carbide slag 100% substitutes natural calcareous raw material kiln and decomposes the method for producing cement clinker outward | |
| CN110317038B (en) | Sintered brick prepared from river sludge and sludge carbon, firing and waste gas purification system and method | |
| CN108558364B (en) | Process for co-firing limestone by using coal gangue bricks | |
| CN101337793A (en) | Method for producing energy-saving bricks by comprehensive utilization of paper making sludge and fly ash | |
| CN101607796B (en) | Method for producing low alkali cement by using high alkali raw materials | |
| CN101598339B (en) | Resource disposal method by conditioning and incinerating crop straw and sewage sludge | |
| CN101817671B (en) | Method for burning fly ash by utilizing refuse in ceramsite production | |
| CN105800973A (en) | Method for preparing cement from municipal solid waste incineration furnace slag | |
| CN211770962U (en) | System for preparing sulphoaluminate cement by using all solid wastes of aluminum ash pretreatment | |
| CN102351444A (en) | Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature | |
| CN102703157B (en) | Multi-product cleaning and producing method with coal gangue comprehensive utilization | |
| CN103922624A (en) | Clinker sintering system taking carbide slag as calcareous raw material and being used for treating smoke generated in waste incineration | |
| CN113277760B (en) | Method and system for cooperatively disposing electrolytic manganese slag by cement kiln | |
| CN201297860Y (en) | Device for calcining cement by utilizing acetylene sludge to completely substitute the limestone | |
| CN1247841A (en) | Cement baking process in kiln with dry preheater by using city garbage as material | |
| CN114517915A (en) | System and process method for preparing ceramsite by combining waste incineration and sludge | |
| CN100369848C (en) | Method for firing cement from urban refuse | |
| CN1556349A (en) | Domestic garbage treatment and cement rotary kiln combined production technology | |
| CN112694272A (en) | Low-carbon high-strength cementing material prepared from coal gangue power plant solid waste and preparation method thereof | |
| CN107640952A (en) | The method for producing light concrete product | |
| CN1844746A (en) | Gangue and domestic refuse calciner, power generation and ceramic manufacturing system composed thereby | |
| CN115259102B (en) | Process and equipment for preparing sulfur dioxide concentrated flue gas and silicate clinker by flue gas diversion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |