CN101886811A - Method for coprocessing sludge with high moisture content by novel dry-process rotary kiln - Google Patents
Method for coprocessing sludge with high moisture content by novel dry-process rotary kiln Download PDFInfo
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- CN101886811A CN101886811A CN 201010178688 CN201010178688A CN101886811A CN 101886811 A CN101886811 A CN 101886811A CN 201010178688 CN201010178688 CN 201010178688 CN 201010178688 A CN201010178688 A CN 201010178688A CN 101886811 A CN101886811 A CN 101886811A
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Abstract
The invention discloses a method for coprocessing sludge with high moisture content by a novel dry-process rotary kiln. Sludge with high moisture content is transported into a kiln tail smoke chamber or a decomposing furnace to be burnt out without being dried and grinded; when the amount of sludge required to process is small, coal property is favourably decomposed, the combustion state of pulverized coal in the decomposing furnace is excellent, and the sludge with high moisture content is atomized by a pump and is ejected into the kiln tail smoke chamber or the decomposing furnace to be burnt out or mechanically sent into the kiln tail smoke chamber to be burnt out; when the amount of sludge required to process is big or the combustion state of pulverized coal in the decomposing furnace is poor, regulating components are added into the sludge with high moisture content, the sludge with high moisture content is subjected to filter-pressing or stockpile and drainage to be sent into the kiln tail smoke chamber or the decomposing furnace to be burnt out, or the sludge, the broken town household garbage and the like are mixed and milled to be sent into the kiln tail smoke chamber or the decomposing furnace to be burnt out together; and the moisture content introduced by the sludge is not more than 3% of raw material inventory. On the premise of keeping the production stability of the dry-process rotary kiln and keeping clinker sintering energy consumption and quality, the invention can harmlessly process sludge with high moisture content in the mode of energy and reclamation.
Description
Technical field:
The present invention relates to a kind of environmental protection and waste utilization processing method of high water content sludge, be specifically related to the method for associated treatment high water content sludge in a kind of novel dry-process rotary kiln production, be used for solving manufacture of cement in energy-conservation mode, innoxious, resource, handle the problem of environmental pollution of high water content sludge well energy.
Background technology:
Water contents such as high water content sludge such as municipal water treatment sludge, printing and dyeing mill's mud reach 75%～85% usually, except that containing a certain amount of inorganic matter, also contain a large amount of organic matters and pathogen microorganism or noxious material, and harmless treatment is very difficult.Present state-of-the-art way is oven dry, especially adopts the oven dry of residual heat of electric power plant or cement plant used heat as alternative fuel.But oven dry investment first is big, second dries operation energy consumption expense height, moreover the oven dry exhaust-gas treatment is very difficult, and the water-containing sludge drying line that Zhejiang and Guangdong have been built is excessive because of the oven dry exhaust emission, has caused in for several times tens of kilometers residents' conflict and halts.
Summary of the invention:
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists, and provide a kind of method of coprocessing sludge with high moisture content by novel dry-process rotary kiln, resolve do not influence the dry-process rotary kiln production stability, do not influence innoxious under the prerequisite that grog burns till energy consumption and quality, energy, the problem of the good high water content sludge of recycling treatment, guarantee, energy innoxious, the good high water content sludge of recycling treatment with low investment and economic mode.
The technical solution used in the present invention is: the method for this coprocessing sludge with high moisture content by novel dry-process rotary kiln, with high water content sludge not drying send into kiln tail smoke-box without grinding or dore furnace burns processing; Less and meet when required processing sludge quantity: sludge quantity * moisture content (%) ÷ raw material inventory≤3%, the better dore furnace coal dust firing of used ature of coal can spray into water content sludge and burn in kiln tail smoke-box or the dore furnace or machinery is sent into kiln tail smoke-box and burnt in order with the pump atomizing; Big or dore furnace coal dust firing situation is relatively poor when required processing sludge quantity, after then high water content sludge being added the adjustment component, press filtration is to moisture content＜40% or store up to drain to send in kiln tail smoke-box or the dore furnace to moisture content＜40% and burn again, or will send into kiln tail smoke-box in the lump after the mud of moisture content＜40% and the mixed grinds such as application of city life garbage after the fragmentation or dore furnace burns, the moisture content amount that control mud is brought into is not more than 3% of raw material inventory.
Above-mentioned required processing high water content sludge amount is meant that more greatly the amount of sludge of required processing is bigger, its water content excessive number, exceeded the ability to bear of the normal operation of dry-process rotary kiln pre-heating system and dore furnace burning, promptly the moisture content total amount exceeds 3% of raw material inventory; The relatively poor finger dore furnace of described dore furnace coal dust firing situation is poor because of self structure parameter reason and used ature of coal, causes the burning velocity of coal dust and ignition temperature on the low side, and burnout rate is low, influenced greatly by low-temperature material and moisture content.
High water content sludge described in the technique scheme is municipal water treatment sludge, Treatment of Industrial Water mud and organic mud, processing of farm products mud.
The added adjustment component of the press filtration of high water content sludge described in the technique scheme is for secreting filtering material such as husk, stalk kind fibrous material and coal ash etc., or for secreting filtering material and grey slag ingredient correction material, the ash slag ingredient is proofreaied and correct material and is referred to adjust the contained silicon of inorganic matter in the mud, aluminium, iron, ca proportion to alleviate the added granular material of clinker composition influence, and all are adjusted components and are the cement industry material known.
Above-mentioned grey slag ingredient is proofreaied and correct material such as carbide slag, stone flour, lime and/or kiln ash etc.
Pump described in the technique scheme, filter press, mixed grind machinery are known equipment.
Along with city-building and economic development, high water content sludge is wide and amount is many, presses for suitable national conditions, low investment, operation energy consumption and the low new simple and effective method of disposal of expense.The novel dry-process rotary kiln line China now move about 1100 surplus, be distributed in mostly in the tens of kilometer range in cities and towns.Be engaged in the experience of two more than ten years of cement industry technology and a large amount of experiment works according to the applicant, utilizing the dry-process rotary kiln production line to handle high water content sludge with straightforward procedure is that reality is feasible, dry-process rotary kiln line kiln tail smoke-box temperature up to 1000 ℃～1100 ℃ and waste gas burns once more by dore furnace, dore furnace central part coal dust firing temperature also up to 1100 ℃～1300 ℃, the dore furnace outlet temperature also reaches 850 ℃～900 ℃, gas residence time is long, organic matter can thoroughly decompose and burns, and dore furnace itself is in the strong basicity environment, the flue gas that goes out dore furnace also needs through 5 grades of cyclone preheaters and alkaline powder sufficient heat exchange and absorption, sour gas such as SO2 is absorbed in the smoke-box, can effectively reach free of contamination harmless treatment, and recyclable wherein the organic matter calorific value and all inorganic matters be converted into clinker.The present invention also has an important prerequisite, be exactly that the method for disposal of high water content sludge can not influence the normal combustion of coal dust in the dore furnace and Pyatyi pre-heating system and do not cause sticking stifledly because of high humidity steam and chlor-alkali etc., and grog burnt till energy consumption and clinker quality does not have big influence.
The method of coprocessing sludge with high moisture content by novel dry-process rotary kiln of the present invention, based on theory analysis and a large amount of test repeatedly, set about from the stable operation condition of operation stability of kiln system especially dore furnace and preheater, efficiently solve the problem that influences to kiln system stable operation and grog energy consumption and clinker quality such as the moisture content of high water content sludge and chlor-alkali, broken through high water content sludge not drying, energy innoxious, the direct applied restriction bottleneck of resource on novel dry-process rotary kiln without grinding.
The remarkable advantage effect:
1, high water content sludge not drying, without grinding, directly use the secondary pollution problem of no waste gas waste residue;
2, can guarantee kiln system stable operation, and not influence grog and burn till hear rate and quality;
3, simple for process, invest very little.
The specific embodiment:
Embodiment 1: certain the φ 4 * 60m of factory kiln band D-D dore furnace, test with municipal water treatment sludge water content 80%～83%, mud butt calorific value 3600～4200 * 4.18KJ/kg, adopt plunger displacement pump to be pressed into mud, 0.6MPa compressed air, with the self-control spiral nozzle, spray into from kiln tail smoke-box, mud straying quatity 4.0t/h, raw material inventory 162t/h brings moisture content into and is about 2% of raw material amount, the dore furnace coal dust firing is normal, it is sticking stifled that preheater does not have, about 1%, the no abnormal fluctuation of intensity detection that heat consumption of clinker reduces, and waste gas detects normal.
Embodiment 2: the improved D-D dore furnace of certain the φ 3 * 48m of factory kiln band, test with municipal water treatment sludge water content 79%～85%, mud butt calorific value 2750～3800 * 4.18KJ/kg, adopt plunger displacement pump to be pressed into mud, 0.5MPa compressed air, self-control spiral nozzle, spray into from dore furnace, during mud straying quatity 2.7t/h, raw material inventory 78t/h brings moisture content into and accounts for 2.9% of raw material amount.The dore furnace coal dust firing is normal, and preheater does not have significantly sticking stifled, and heat consumption of clinker and intensity detection are no abnormal, and waste gas detects normal.
Embodiment 3: certain the φ 4.2 * 64m of factory kiln band duct type dore furnace, test with municipal water treatment sludge moisture 80%～84%, mud butt calorific value 3800～4100 * 4.18KJ/kg, take in mud, to add continuously wet carbide slag about 8%, rough coal ash about 5%, about 2% continuous stirring of husk, pump into filter residue moisture content 30%～34% after the press filtration of plate and frame type filter-press 1.0MPa compressed air, filter residue machinery feeding kiln tail smoke-box, get excited with air bubble, filter residue inventory 17t/h, raw material inventory 193t/h, the dore furnace situation is normal, preheater does not have significantly sticking stifled, the kiln system operation is normal stable, and grog burns till hear rate and the no abnormal fluctuation of grog quality testing index, and waste gas detects normal.
Embodiment 4: certain the φ 3 * 48m of factory kiln band D-D dore furnace, test with municipal water treatment plant mud and county town house refuse and the old carbide slag in the mountain of throwing aside, house refuse through coarse crushing and in small, broken bits after with the water treatment sludge of carbide slag and moisture 80%～84% send into by 6: 2: 2 batchings rolling and mixing machine roll mix after, sending into kiln tail smoke-box gets excited with air bubble, raw material inventory 81t/h grinds and mixes material feeding 13t/h.Dore furnace and preheater are normal substantially, kiln system is stable, heat consumption of clinker on average reduces approximately 3%, and grog physical detection index is normal, and waste gas detects normal.
Claims (3)
1. the method for a coprocessing sludge with high moisture content by novel dry-process rotary kiln, it is characterized in that with high water content sludge not drying send into kiln tail smoke-box without grinding or dore furnace burns processing; Less and meet when required processing sludge quantity: sludge quantity * moisture content (%) ÷ raw material inventory≤3%, the better dore furnace coal dust firing of used ature of coal can spray into water content sludge and burn in kiln tail smoke-box or the dore furnace or machinery is sent into kiln tail smoke-box and burnt in order with the pump atomizing; Big or dore furnace coal dust firing situation is relatively poor when required processing sludge quantity, after then high water content sludge being added the adjustment component, press filtration is to moisture content＜40% or store up to drain to send in kiln tail smoke-box or the dore furnace to moisture content＜40% and burn again, or will send into kiln tail smoke-box in the lump after the mud of moisture content＜40% and the mixed grinds such as application of city life garbage after the fragmentation or dore furnace burns, the moisture content amount that control mud is brought into is not more than 3% of raw material inventory.
2. the method for coprocessing sludge with high moisture content by novel dry-process rotary kiln according to claim 1 is characterized in that described high water content sludge is municipal water treatment sludge, Treatment of Industrial Water mud and organic mud, processing of farm products mud.
3. the method for coprocessing sludge with high moisture content by novel dry-process rotary kiln according to claim 1, it is characterized in that the added adjustment component of described high water content sludge press filtration is for secreting filtering material such as husk, stalk kind fibrous material and coal ash etc., or proofread and correct material for secreting filtering material and grey slag ingredient, grey slag ingredient is proofreaied and correct material and is referred to adjust the contained silicon of inorganic matter in the mud, aluminium, iron, ca proportion to alleviate the added granular material of clinker composition influence.
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| CN 201010178688 CN101886811A (en) | 2010-05-21 | 2010-05-21 | Method for coprocessing sludge with high moisture content by novel dry-process rotary kiln |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153297A (en) * | 2010-11-29 | 2011-08-17 | 赵楠 | Method and equipment for treating town sludge by novel dry-method cement kiln |
| CN102757164A (en) * | 2012-07-30 | 2012-10-31 | 尹小林 | Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln |
| CN102923923A (en) * | 2012-10-12 | 2013-02-13 | 北京水泥厂有限责任公司 | Method for reducing nitric oxides by using disposed sludge |
| CN103224335A (en) * | 2013-05-03 | 2013-07-31 | 滕州市东郭水泥有限公司 | Sludge wet-processing technology and equipment |
| CN104315523A (en) * | 2014-11-07 | 2015-01-28 | 西安建筑科技大学 | Method for drying and burning sludge via cement plant kiln tail system |
| CN104329675A (en) * | 2014-11-07 | 2015-02-04 | 西安建筑科技大学 | Method for incinerating sludge by using kiln tail system of cement plant |
| CN104402271A (en) * | 2014-10-31 | 2015-03-11 | 尹无忌 | Denuded particle crystal seed modification method for utilizing sludge in dry-process rotary kiln |
| CN110963721A (en) * | 2019-12-27 | 2020-04-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by utilizing dry-process cement plant transformation treatment manganese slag |
| CN110963722A (en) * | 2019-12-27 | 2020-04-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by treating electrolytic manganese slag through non-homogenization process |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153297A (en) * | 2010-11-29 | 2011-08-17 | 赵楠 | Method and equipment for treating town sludge by novel dry-method cement kiln |
| CN102757164A (en) * | 2012-07-30 | 2012-10-31 | 尹小林 | Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln |
| CN102757164B (en) * | 2012-07-30 | 2014-01-08 | 尹小林 | Device and method for denitration and treating sludge containing organic matter by utilizing dry-method rotary kiln |
| CN102923923A (en) * | 2012-10-12 | 2013-02-13 | 北京水泥厂有限责任公司 | Method for reducing nitric oxides by using disposed sludge |
| CN103224335A (en) * | 2013-05-03 | 2013-07-31 | 滕州市东郭水泥有限公司 | Sludge wet-processing technology and equipment |
| CN104402271A (en) * | 2014-10-31 | 2015-03-11 | 尹无忌 | Denuded particle crystal seed modification method for utilizing sludge in dry-process rotary kiln |
| CN104402271B (en) * | 2014-10-31 | 2016-01-06 | 尹无忌 | A kind of mud is used for the ridge grain seeding method of dry-process rotary kiln |
| CN104329675A (en) * | 2014-11-07 | 2015-02-04 | 西安建筑科技大学 | Method for incinerating sludge by using kiln tail system of cement plant |
| CN104315523A (en) * | 2014-11-07 | 2015-01-28 | 西安建筑科技大学 | Method for drying and burning sludge via cement plant kiln tail system |
| CN110963721A (en) * | 2019-12-27 | 2020-04-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by utilizing dry-process cement plant transformation treatment manganese slag |
| CN110963722A (en) * | 2019-12-27 | 2020-04-07 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by treating electrolytic manganese slag through non-homogenization process |
| CN110963721B (en) * | 2019-12-27 | 2022-06-14 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by utilizing dry-process cement plant transformation treatment manganese slag |
| CN110963722B (en) * | 2019-12-27 | 2022-06-21 | 湖南省小尹无忌环境能源科技开发有限公司 | Method for producing active admixture by treating electrolytic manganese slag through non-homogenization process |
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Application publication date: 20101117 |