CN105222601A - A kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems - Google Patents
A kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems Download PDFInfo
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- CN105222601A CN105222601A CN201510729729.7A CN201510729729A CN105222601A CN 105222601 A CN105222601 A CN 105222601A CN 201510729729 A CN201510729729 A CN 201510729729A CN 105222601 A CN105222601 A CN 105222601A
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- waste heat
- cement kiln
- rubbish
- tail gas
- grate
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- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 233
- 239000002918 waste heat Substances 0.000 title claims abstract description 135
- 239000004568 cement Substances 0.000 title claims abstract description 123
- 239000003245 coal Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 234
- 238000001035 drying Methods 0.000 claims abstract description 111
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- 238000007599 discharging Methods 0.000 claims description 51
- 239000012855 volatile organic compound Substances 0.000 claims description 44
- 239000005416 organic matter Substances 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 238000000605 extraction Methods 0.000 claims description 11
- 238000003860 storage Methods 0.000 description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 21
- 239000003351 stiffener Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 9
- 238000009826 distribution Methods 0.000 description 8
- 238000003912 environmental pollution Methods 0.000 description 8
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 230000003750 conditioning effect Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001722 carbon compounds Chemical class 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- -1 carbon hydrogen compound Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N sec-butylidene Natural products CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 238000010564 aerobic fermentation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems.Described method utilizes in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish, and moisture rubbish forms mummification rubbish by heat drying.Described quality coal in cement kiln systems comprises cement kiln, grate-cooler and generator, described cement kiln is furnished with dore furnace, described dore furnace is furnished with one-level preheater, and the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in one-level preheater with waste heat moisture rubbish heating, to be drawn by the tail gas in the low-temperature zone of grate-cooler with waste heat moisture rubbish heating, to be drawn by the tail gas in generator with waste heat and heat moisture rubbish to moisture rubbish heating.The residual heat resources that the present invention can make full use of cement kiln abundant carry out mummification to moisture rubbish, can save a large amount of energy for the moisture rubbish of mummification, shorten drying time, reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
Description
Technical field
The present invention relates to the method and apparatus of the moisture rubbish of a kind of mummification, particularly relate to a kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems.
Background technology
Along with the continuous expansion of city size, improving constantly of the growing and living standards of the people of urban population, the generation of domestic waste is increasing gradually.As far back as 1996, the municipal refuse amount of clearing of China just reached 100,000,000 tons, and every year with 8% ~ 10% speed increment.The volume of cargo in storage over the years of rubbish reaches more than 60 hundred million tons, and the whole nation has more than 200 city to be absorbed among the encirclement of rubbish, and rubbish is stored up the land area of occupying and reached more than 500,000,000 square metre.
Incineration technology is considered to realize one of the most effective means of daily-life garbage without environmental pollution, minimizing and resource.But the moisture content of China's house refuse is generally more than 50%, and calorific value is lower, and a large amount of moisture also becomes the main source of percolate when landfill, burning, compost etc. process.Therefore, in waste incineration, important pre-treatment reduces moisture content exactly.
Current garbage burning factory is the moisture content reducing crude waste, the mode that usual employing is biological dewatered, namely the biological heat energy that in microorganism high-temperature aerobic fermentation process, organic matter degradation produces is utilized, promote moisture evaporation by process adjustment means, thus realize removing moisture fast, but biological dewateredly generally need 15-30 days time, the mummification cycle is long, need rubbish spread overwide areas, the land area taken is comparatively large, and the treating capacity of rubbish is restricted.In heat drying, be generally used for mud, the application in rubbish heat drying is actually rare.
On the other hand, because the waste heat generation of quality coal in cement kiln systems is huge, be not but fully utilized, by chimney, the hot gas of up to a hundred degrees Celsius can only be entered high-altitude, like this, a large amount of waste heats slatterns in vain.Want to utilize these waste heat not a duck soups, do not find that there is through a large amount of patent retrievals and utilize the waste heat of quality coal in cement kiln systems to carry out the method and apparatus of mummification to moisture rubbish.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems, the residual heat resources that the method can make full use of cement kiln abundant carry out mummification to moisture rubbish, a large amount of energy for the moisture rubbish of mummification can be saved, shorten drying time, reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
In order to solve above-mentioned technical problem, the present invention utilizes the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems to be utilize in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish, and moisture rubbish forms mummification rubbish by heat drying.
Described quality coal in cement kiln systems comprises cement kiln, grate-cooler and generator, described cement kiln is furnished with dore furnace, described dore furnace is furnished with one-level preheater, the grog discharging opening of described cement kiln is communicated with the charging aperture of described grate-cooler, and the gas outlet of described grate-cooler middle-temperature section is communicated with the air inlet of described generator; The described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in one-level preheater with waste heat to heat moisture rubbish to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is that the tail gas in the low-temperature zone by grate-cooler with waste heat is drawn and heated moisture rubbish to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in generator with waste heat to heat moisture rubbish to moisture rubbish heating.
Described is that the tail gas will from the gas outlet of one-level preheater with waste heat is drawn by the tail gas extraction in one-level preheater with waste heat, when the tail gas in one-level preheater with waste heat being drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the high temperature section gas outlet through grate-cooler after mixing with tertiary air enters dore furnace;
Described extraction by the tail gas in grate-cooler with waste heat is that the tail gas gas outlet of grate-cooler low-temperature zone with waste heat is drawn, when the tail gas in grate-cooler low-temperature zone with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and send into dore furnace through the high temperature section gas outlet of grate-cooler after mixing with tertiary air;
Described extraction by the tail gas in generator with waste heat is drawn from generator gas outlet by the tail gas with waste heat, when the tail gas in generator with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the high temperature section gas outlet through grate-cooler after mixing with tertiary air enters dore furnace.
The temperature of described grate-cooler 2 high temperature section is 800 ~ 900 degrees Celsius.
The exhaust temperature of described quality coal in cement kiln systems is 100 ~ 400 degrees Celsius.
The exhaust temperature of described quality coal in cement kiln systems is 100 ~ 200 degrees Celsius, 200 ~ 300 degrees Celsius or 300 ~ 400 degrees Celsius.
Moisture rubbish is in tiling and motion state in the process of heating, and the direction of motion of described tail gas is contrary with the direction of motion of moisture rubbish.
The air quantity of described tail gas is 23000m
3/ h ~ 85000m
3/ h, the speed of service of moisture rubbish is 0.6 ~ 1.5 m/min, and drying time is 3 ~ 5 hours.
Send after mummification refuse breaking to 50mm ~ 120mm into quality coal in cement kiln systems, and in dore furnace imperfect combustion.
Described moisture rubbish carries out in seal cavity by the process of heat drying.
The present invention utilizes the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems compared with prior art to have following beneficial effect.
1, the technical program utilizes in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish owing to have employed, moisture rubbish forms the technological means of mummification rubbish by heat drying, so, the residual heat resources that can make full use of cement kiln abundant carry out mummification to moisture rubbish, a large amount of energy for the moisture rubbish of mummification can be saved, shorten drying time, reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
2, the technical program is drawn by the tail gas in one-level preheater with waste heat to heat moisture rubbish owing to have employed the described tail gas with waste heat of utilizing in quality coal in cement kiln systems to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is that the tail gas in the low-temperature zone by grate-cooler with waste heat is drawn and heated moisture rubbish to moisture rubbish heating; And/or, the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is that the tail gas in generator with waste heat is drawn the technological means heated moisture rubbish to moisture rubbish heating, so, available temperature section is more, the waste heat of one of them temperature section can be utilized according to actual conditions, or the waste heat fully utilizing multiple temperature section carries out heating and drying to moisture rubbish.
3, the technical program is that the tail gas will from the gas outlet of one-level preheater with waste heat is drawn owing to have employed described extraction by the tail gas in one-level preheater with waste heat, when the tail gas in one-level preheater with waste heat being drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is entered through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Again due to have employed described by have in grate-cooler waste heat tail gas draw be the gas outlet of grate-cooler low-temperature zone is had waste heat tail gas draw, when the tail gas in grate-cooler low-temperature zone with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is sent into through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Also due to have employed described by have in generator waste heat tail gas draw be from generator gas outlet will have waste heat tail gas draw, when the tail gas in generator with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is entered through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
4, technical scheme due to the temperature that have employed described grate-cooler 2 high temperature section be the technological means of 800 ~ 900 degrees Celsius, so, rubbish dries the tail gas containing VOCs of discharge after this temperature section, the all oxidized decomposition of most VOCs, utilize cement kiln its own system process stench, decrease VOCs gas purging.
5, technical scheme due to the exhaust temperature that have employed described quality coal in cement kiln systems be the technological means of 100 ~ 400 degrees Celsius, so, not only take full advantage of the low-temperature zone waste heat of cement kiln, and dry rubbish below 400 degree, VOCs gas and stench volatilization less.
6, technical scheme due to the exhaust temperature that have employed described quality coal in cement kiln systems be the technological means of 100 ~ 200 degrees Celsius, so, take full advantage of the low-temperature zone waste heat of cement kiln, and rubbish is dried below 200 degree, not only VOCs gas and stench volatilize less, also can not there is pyrolytic reaction in rubbish, garbage drying bed operating is steady.When the exhaust temperature adopting described quality coal in cement kiln systems is 200 ~ 300 degrees Celsius, then can make full use of the low-temperature zone waste heat of cement kiln.When rubbish is dried in employing 200 ~ 300 degrees Celsius, not only VOCs gas and stench volatilize less, and rubbish heat exchange efficiency is higher.When the exhaust temperature adopting described quality coal in cement kiln systems is 300 ~ 400 degrees Celsius, then rubbish heat exchange efficiency is the highest, and the drying bed speed of service is accelerated, and drying time shortens, and garbage drying efficiency improves.
7, technical scheme is in tiling and motion state owing to have employed moisture rubbish in the process of heating, the direction of motion of described tail gas is contrary with the direction of motion of moisture rubbish, so, not only greatly can improve the mummification efficiency of moisture rubbish, and, the moisture rubbish of mummification continuously can also be realized.
8, technical scheme due to the air quantity that have employed described tail gas be 23000m
3/ h ~ 85000m
3/ h, the speed of service of moisture rubbish is 0.6 ~ 1.5 m/min, and drying time is the technological means of 3 ~ 5 hours, so, greatly improve the mummification quality of moisture rubbish.
9, technical scheme is owing to have employed the technological means by sending into quality coal in cement kiln systems after mummification refuse breaking to 50mm ~ 120mm, so, mummification rubbish after fragmentation can in dore furnace imperfect combustion, organic matter in rubbish is after imperfect combustion, do not generate carbon dioxide, but generate undersaturated triple bond hydrocarbon, double key carbon hydrogen compound and five carbon compounds such as methane, hydrogen, isopentane, normal butane, propylene, these compounds as the reducing substances removing nitrogen oxide, can reduce the discharge of nitrogen oxide.
10, technical scheme is the technological means of carrying out in seal cavity owing to have employed described moisture rubbish by the process of heat drying, so, not only can make full use of the waste heat of quality coal in cement kiln systems further, and, greatly can reduce the pollution of the gas in rubbish to environment.
Accompanying drawing explanation
Utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems to be described in further detail to the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of the first drying bed of present embodiment.
Fig. 2 is the structural representation of rotary-belt bed surface in the drying bed of Fig. 1.
Fig. 3 is the structural representation of present embodiment the second drying bed.
Fig. 4 is the structural representation of rotary-belt bed surface in the drying bed of Fig. 3.
Fig. 5 is the main TV structure schematic diagram of the first bed board in the drying bed of present embodiment.
Fig. 6 is the plan structure schematic diagram of the first bed board in the drying bed of present embodiment.
Fig. 7 be in the drying bed of present embodiment the first bed board look up structural representation.
Fig. 8 is the main TV structure schematic diagram of the second bed board in the drying bed of present embodiment.
Fig. 9 is the plan structure schematic diagram of the second bed board in the drying bed of present embodiment.
Figure 10 be in the drying bed of present embodiment the second bed board look up structural representation.
Figure 11 is the main TV structure schematic diagram of the third bed board in the drying bed of present embodiment.
Figure 12 is the plan structure schematic diagram of the third bed board in the drying bed of present embodiment.
Figure 13 be in the drying bed of present embodiment the third bed board look up structural representation.
Figure 14 is the structural representation of the first gas distributing pipeline in the drying bed of present embodiment.
Figure 15 is the structural representation of the second gas distributing pipeline in the drying bed of present embodiment.
Figure 16 is the structural representation of the third gas distributing pipeline in the drying bed of present embodiment.
Figure 17 is the structural representation of the 4th kind of gas distributing pipeline in the drying bed of present embodiment.
Figure 18 is the structural representation of present embodiment anhydration system.
Figure 19 is the structural representation that present embodiment has the anhydration system of the drying bed of multiple parallel distribution.
Figure 20 is the structural representation that present embodiment has the anhydration system of the drying bed of multiple radiation profiles.
Description of reference numerals is as follows.
1 ~ cement kiln;
1-1 ~ dore furnace;
1-2 ~ one-level preheater;
2 ~ grate-cooler;
2-1 ~ blower fan;
3 ~ generator;
3-1 ~ blower fan;
3-2 ~ conditioning Tower;
3-3 ~ raw mill;
3-4 ~ sack cleaner;
3-5 ~ blower fan;
3-6 ~ chimney;
4 ~ sack cleaner;
4-1 ~ blower fan;
5 ~ drying bed;
5-1 ~ sprocket wheel;
5-2 ~ circumversion chain;
5-3 ~ bed board;
5-4 ~ flexible attachment components;
5-5 ~ seal casinghousing;
5-6 ~ charging aperture;
5-7 ~ discharging opening;
5-8 ~ air inlet;
5-9 ~ gas outlet;
5-10 ~ draw flitch;
5-11 ~ gas distributing pipeline;
5-12 ~ qi-emitting hole;
5-13 ~ sepage air-vent;
5-14 ~ stiffener;
5-15 ~ gear mud stiffener;
6 ~ rubbish feed bin;
7 ~ belt feeder;
8 ~ belt feeder;
9 ~ storage bin;
10 ~ belt feeder;
11 ~ disintegrating machine;
12 ~ bucket elevator.
Detailed description of the invention
As shown in figure 18, present embodiment provides a kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems, utilizes in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish, and moisture rubbish forms mummification rubbish by heat drying.
Present embodiment utilizes in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish owing to have employed, moisture rubbish forms the technological means of mummification rubbish by heat drying, so, the residual heat resources that can make full use of cement kiln abundant carry out mummification to moisture rubbish, a large amount of energy for the moisture rubbish of mummification can be saved, shorten drying time, reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
One as present embodiment is improved, as shown in figure 18, described quality coal in cement kiln systems comprises cement kiln 1, grate-cooler 2 and generator 3, described cement kiln 1 is furnished with dore furnace 1-1, described dore furnace 1-1 is furnished with one-level preheater 1-2, the grog discharging opening of described cement kiln 1 is communicated with the charging aperture of described grate-cooler 2, and the gas outlet of described grate-cooler 2 middle-temperature section is communicated with the air inlet of described generator 3; The described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in one-level preheater 1-2 with waste heat to heat moisture rubbish to moisture rubbish heating.Certainly, also can be the described tail gas with waste heat of utilizing in quality coal in cement kiln systems be the tail gas in the low-temperature zone of grate-cooler 2 with waste heat is drawn heat moisture rubbish to moisture rubbish heating.Can also be the described tail gas with waste heat of utilizing in quality coal in cement kiln systems be the tail gas in generator 3 with waste heat is drawn heat moisture rubbish to moisture rubbish heating.
Present embodiment is drawn by the tail gas in one-level preheater with waste heat to heat moisture rubbish owing to have employed the described tail gas with waste heat of utilizing in quality coal in cement kiln systems to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is that the tail gas in the low-temperature zone by grate-cooler with waste heat is drawn and heated moisture rubbish to moisture rubbish heating; And/or, the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is that the tail gas in generator with waste heat is drawn the technological means heated moisture rubbish to moisture rubbish heating, so, available temperature section is more, the waste heat of one of them temperature section can be utilized according to actual conditions, or the waste heat fully utilizing multiple temperature section carries out heating and drying to moisture rubbish.
Further improve as present embodiment, as shown in figure 18, described is that the tail gas will from the gas outlet of one-level preheater 1-2 with waste heat is drawn by the tail gas extraction in one-level preheater 1-2 with waste heat, when the tail gas in one-level preheater 1-2 with waste heat being drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler 2 high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler 2, and the high temperature section gas outlet through grate-cooler 2 after mixing with tertiary air enters dore furnace 1-1.
Described extraction by the tail gas in grate-cooler 2 with waste heat is that the tail gas gas outlet of grate-cooler 2 low-temperature zone with waste heat is drawn, when the tail gas in grate-cooler 2 low-temperature zone with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler 2 high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler 2, and send into dore furnace 1-1 through the high temperature section gas outlet of grate-cooler 2 after mixing with tertiary air.
Described extraction by the tail gas in generator 3 with waste heat is drawn from generator 3 gas outlet by the tail gas with waste heat, when the tail gas in generator 3 with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces grate-cooler 2 high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the high temperature section gas outlet through grate-cooler 2 after mixing with tertiary air enters dore furnace 1-1.
Present embodiment is that the tail gas will from the gas outlet of one-level preheater with waste heat is drawn owing to have employed described extraction by the tail gas in one-level preheater with waste heat, when the tail gas in one-level preheater with waste heat being drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is entered through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Again due to have employed described by have in grate-cooler waste heat tail gas draw be the gas outlet of grate-cooler low-temperature zone is had waste heat tail gas draw, when the tail gas in grate-cooler low-temperature zone with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is sent into through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Also due to have employed described by have in generator waste heat tail gas draw be from generator gas outlet will have waste heat tail gas draw, when the tail gas in generator with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces grate-cooler high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and the technological means of dore furnace after mixing with tertiary air, is entered through the high temperature section gas outlet of grate-cooler, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Further improve as present embodiment, as shown in figure 18, the temperature of described grate-cooler 2 high temperature section is 800 ~ 900 degrees Celsius.
Present embodiment due to the temperature that have employed described grate-cooler 2 high temperature section be the technological means of 800 ~ 900 degrees Celsius, so, rubbish dries the tail gas containing VOCs of discharge after this temperature section, the all oxidized decomposition of most VOCs, utilize cement kiln its own system process stench, decrease VOCs gas purging.
Also further improve as present embodiment, as shown in figure 18, the exhaust temperature of described quality coal in cement kiln systems is 100 ~ 400 degrees Celsius.
Present embodiment due to the exhaust temperature that have employed described quality coal in cement kiln systems be the technological means of 100 ~ 400 degrees Celsius, so, not only take full advantage of the low-temperature zone waste heat of cement kiln, and dry rubbish below 400 degree, VOCs gas and stench volatilization less.
Further improve again as present embodiment, as shown in figure 18, the exhaust temperature of described quality coal in cement kiln systems is 100 ~ 200 degrees Celsius, 200 ~ 300 degrees Celsius or 300 ~ 400 degrees Celsius.
Present embodiment due to the exhaust temperature that have employed described quality coal in cement kiln systems be the technological means of 100 ~ 200 degrees Celsius, so, take full advantage of the low-temperature zone waste heat of cement kiln, and rubbish is dried below 200 degree, not only VOCs gas and stench volatilize less, also can not there is pyrolytic reaction in rubbish, garbage drying bed operating is steady.When the exhaust temperature adopting described quality coal in cement kiln systems is 200 ~ 300 degrees Celsius, then can make full use of the low-temperature zone waste heat of cement kiln.When rubbish is dried in employing 200 ~ 300 degrees Celsius, not only VOCs gas and stench volatilize less, and rubbish heat exchange efficiency is higher.When the exhaust temperature adopting described quality coal in cement kiln systems is 300 ~ 400 degrees Celsius, then rubbish heat exchange efficiency is the highest, and the drying bed speed of service is accelerated, and drying time shortens, and garbage drying efficiency improves.
Further improve as present embodiment, as shown in figure 18, moisture rubbish is in tiling and motion state in the process of heating, and the direction of motion of described tail gas is contrary with the direction of motion of moisture rubbish.
Present embodiment is in tiling and motion state owing to have employed moisture rubbish in the process of heating, the direction of motion of described tail gas is contrary with the direction of motion of moisture rubbish, so, not only greatly can improve the mummification efficiency of moisture rubbish, and, the moisture rubbish of mummification continuously can also be realized.
Further improve as present embodiment, as shown in figure 18, the air quantity of described tail gas is 23000m again
3/ h ~ 85000m
3/ h, the speed of service of moisture rubbish is 0.6 ~ 1.5 m/min, and drying time is 3 ~ 5 hours.
Present embodiment due to the air quantity that have employed described tail gas be 23000m
3/ h ~ 85000m
3/ h, the speed of service of moisture rubbish is 0.6 ~ 1.5 m/min, and drying time is the technological means of 3 ~ 5 hours, so, greatly improve the mummification quality of moisture rubbish.
Also further improve as present embodiment, as shown in figure 18, send after mummification refuse breaking to 50mm ~ 120mm into quality coal in cement kiln systems, and in dore furnace imperfect combustion.
Present embodiment is owing to have employed the technological means by sending into quality coal in cement kiln systems after mummification refuse breaking to 50mm ~ 120mm, so, mummification rubbish after fragmentation can in dore furnace imperfect combustion, organic matter in rubbish is after imperfect combustion, do not generate carbon dioxide, but generate undersaturated triple bond hydrocarbon, double key carbon hydrogen compound and five carbon compounds such as methane, hydrogen, isopentane, normal butane, propylene, these compounds as the reducing substances removing nitrogen oxide, can reduce the discharge of nitrogen oxide.
Further improve again as present embodiment, as shown in figure 18, described moisture rubbish carries out in seal cavity by the process of heat drying.
Present embodiment is the technological means of carrying out in seal cavity owing to have employed described moisture rubbish by the process of heat drying, so, not only can make full use of the waste heat of quality coal in cement kiln systems further, and, greatly can reduce the pollution of the gas in rubbish to environment.
As shown in Figures 1 to 4, a kind of drying bed 5 utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems, comprise the rotary-belt bed surface driven by transmission mechanism, described rotary-belt bed surface is distributed with sepage air-vent 5-13, the rear end of described rotary-belt bed surface is feed end, the front end of described rotary-belt bed surface is discharge end, described rotary-belt bed surface is arranged in seal casinghousing 5-5, the feed end of the corresponding described rotary-belt bed surface of described seal casinghousing 5-5 is respectively arranged with charging aperture 5-6 and gas outlet 5-9, the discharge end of the corresponding described rotary-belt bed surface of described seal casinghousing 5-5 is respectively arranged with discharging opening 5-7 and air inlet 5-8.
Present embodiment is owing to have employed drying bed, comprise the rotary-belt bed surface driven by transmission mechanism, described rotary-belt bed surface is distributed with sepage air-vent, the rear end of described rotary-belt bed surface is feed end, the front end of described rotary-belt bed surface is discharge end, described rotary-belt bed surface is arranged in seal casinghousing, the feed end of the corresponding described rotary-belt bed surface of described seal casinghousing is respectively arranged with charging aperture and gas outlet, the discharge end of the corresponding described rotary-belt bed surface of described seal casinghousing is respectively arranged with the technological means of discharging opening and air inlet, so, the residual heat resources that can make full use of cement kiln abundant carry out mummification to moisture rubbish, a large amount of energy for the moisture rubbish of mummification can be saved, greatly shorten drying time, greatly reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
One as present embodiment is improved, and as shown in Figures 1 to 4, in same seal casinghousing 5-5, described rotary-belt bed surface has one.Certainly, also can be in same seal casinghousing 5-5, described rotary-belt bed surface has multiple, the juxtaposition distribution in the same way of multiple described rotary-belt bed surface.
Present embodiment is owing to have employed in same seal casinghousing, and described rotary-belt bed surface has one at least, multiple described rotary-belt bed surface in the same way juxtaposition distribution technological means, so, multiple drying bed can be produced according to the demand of different client.
Further improve as present embodiment, as shown in figure 1 to figure 13, described rotary-belt bed surface comprises two circumversion chain 5-2 be parallel to each other, the outer peripheral face of two described circumversion chain 5-2 is connected by the bed board 5-3 of multiple strip, multiple described bed board 5-3 phase juxtaposition is distributed on the outer peripheral face of two described circumversion chain 5-2, described transmission mechanism comprises three groups of sprocket wheels, also can be to comprise two groups of sprocket wheels, can also comprise and organize sprocket wheel more.Have two sprocket wheel 5-1 in each group sprocket wheel, two sprocket wheel 5-1 respectively circumversion chain 5-2 described with two engage, and the length direction of described bed board 5-3 is perpendicular to the end face of described sprocket wheel 5-1, and described sepage air-vent 5-13 is distributed on described bed board 5-3.
Present embodiment comprises two circumversion chains be parallel to each other owing to have employed described rotary-belt bed surface, the outer peripheral face of two described circumversion chains is connected by the bed board of multiple strip, multiple described bed board phase juxtaposition is distributed on the outer peripheral face of two described circumversion chains, described transmission mechanism comprises at least two group sprocket wheels, two sprocket wheels are had in each group sprocket wheel, two sprocket wheels engage with two described circumversion chains respectively, the length direction of described bed board is perpendicular to the end face of described sprocket wheel, sepage air-vent is distributed in the technological means on described bed board, so, structure is simple, produce easily, production cost is low.
Further improve as present embodiment, as shown in Figures 5 to 7, four edges of described bed board 5-3 extend to form stiffener 5-14 downwards.Certainly, also can be that two long edges of described bed board 5-3 upwards extend to form gear mud stiffener 5-15 to two short edges of downward-extension shape stiffener 5-14, described bed board 5-3 as shown in Fig. 8 to Figure 10.Can also be or shown in Figure 11 to Figure 13, four edges of described bed board 5-3 extend to form stiffener 5-14 downwards that two short edges of described bed board 5-3 upwards extend to form gear mud stiffener 5-15.
Present embodiment extends to form the technological means of stiffener downwards due to four edges that have employed described bed board, so, greatly can improve the strength and stiffness of bed board.When adopting two long edges of described bed board to downward-extension shape stiffener, when two short edges of described bed board upwards extend to form the technological means of gear mud stiffener, then not only can improve the strength and stiffness of bed board, and, rubbish can also be prevented from two short edge landings of bed board.Stiffener is extended to form downwards when adopting four edges of described bed board, when two short edges of described bed board upwards extend to form the technological means of gear mud stiffener, then not only can improve the strength and stiffness of bed board further, and, rubbish can also be prevented from two short edge landings of bed board.
Also further improve as present embodiment, as shown in Figure 1, described sprocket wheel 5-1 is circular chain-wheel, two ends on rear side of described bed board 5-3 respectively by hinge and two described circumversion chain 5-2 hinged, an end on front side of described bed board 5-3 is connected with the described circumversion chain 5-2 of the same side by flexible attachment components 5-4.Also can be that two ends on front side of described bed board 5-3 are connected with the described circumversion chain 5-2 of the same side respectively by flexible attachment components 5-4.The length of described flexible attachment components 5-4 is greater than the half of described bed board 5-3 width, is less than the square root of 2 of described bed board 5-3 width doubly.
Also can be as shown in Figure 3, described sprocket wheel 5-1 is the sprocket wheel of regular polygon, the number of teeth of sprocket wheel equals the limit number of regular polygon, the pitch of described circumversion chain 5-2 is corresponding to the space width of described sprocket wheel 5-1, the width of described bed board 5-3 is corresponding to the pitch of described circumversion chain 5-2, and described bed board 5-3 is fixedly connected with described circumversion chain 5-2.Preferred as one, the sprocket wheel of described regular polygon is the sprocket wheel of quadrangle four tooth or the sprocket wheel of hexagon six tooth or the sprocket wheel of octagon octadentate.
Present embodiment is circular chain-wheel owing to have employed described sprocket wheel, two ends on rear side of described bed board respectively by hinge and two described circumversion chains hinged, an end on front side of described bed board is connected with the described circumversion chain of the same side by flexible attachment components, or, two ends on front side of described bed board are connected with the described circumversion chain of the same side respectively by flexible attachment components, the length of described flexible attachment components is greater than the half of described bed board width, be less than the square root technological means doubly of 2 of described bed board width, so, not only can guarantee that circumversion chain normally engages with sprocket wheel, and, also can guarantee when bed board has just been positioned at the top of circumversion chain, the leading edge of bed board turns forward and drops on circumversion chain.
When the sprocket wheel that the described sprocket wheel of employing is regular polygon; the number of teeth of sprocket wheel equals the limit number of regular polygon; the pitch of described circumversion chain is corresponding to the space width of described sprocket wheel; the width of described bed board is corresponding to the pitch of described circumversion chain; during the technological means that described bed board is fixedly connected with described circumversion chain, then can guarantee that circumversion chain normally engages with sprocket wheel.
Further improve again as present embodiment, as shown in figures 1 and 3, described charging aperture 5-6 is positioned at the end face at described seal casinghousing 5-5 rear portion, described gas outlet 5-9 is positioned at the end face at described seal casinghousing 5-5 rear portion, described gas outlet 5-9 is positioned at the rear of described charging aperture 5-6, described discharging opening 5-7 is positioned at the bottom of described seal casinghousing 5-5 front end face, be provided with between the discharge end of described discharging opening 5-7 and described rotary-belt bed surface and draw flitch 5-10, described air inlet 5-8 is positioned at the bottom surface of described seal casinghousing 5-5 front portion, the discharge end of the corresponding described rotary-belt bed surface of described seal casinghousing 5-5 is respectively arranged with discharging opening 5-7 and air inlet 5-8.
Present embodiment is positioned at the end face at described seal casinghousing rear portion owing to have employed described charging aperture, described gas outlet is positioned at the end face at described seal casinghousing rear portion, described gas outlet is positioned at the rear of described charging aperture, described discharging opening is positioned at the bottom of described seal casinghousing front end face, be provided with between the discharge end of described discharging opening and described rotary-belt bed surface and draw flitch, described air inlet is positioned at the bottom surface of described seal casinghousing front portion, the discharge end of the corresponding described rotary-belt bed surface of described seal casinghousing is respectively arranged with the technological means of discharging opening and air inlet, so, not only be conducive to charging and the discharging of drying bed, and, also help the air inlet of drying bed and give vent to anger.
Further improve as present embodiment, as shown in Figure 14 and Figure 17, the below being positioned at described rotary-belt bed surface in described seal casinghousing 5-5 is distributed with gas distributing pipeline 5-11, the upper side wall of described gas distributing pipeline 5-11 is distributed with qi-emitting hole 5-12, and one end of described gas distributing pipeline 5-11 is communicated with described air inlet 5-8.
Present embodiment is distributed with gas distributing pipeline owing to have employed in described seal casinghousing the below being positioned at described rotary-belt bed surface, the upper side wall of described gas distributing pipeline is distributed with qi-emitting hole, the technological means that one end of described gas distributing pipeline is communicated with described air inlet, so, greatly can improve waste heat to the mummification efficiency of moisture rubbish and quality.
Further improve again as present embodiment, as shown in figure 14, described gas distributing pipeline 5-11 has one, in long distance bending, after bending, the shape of gas distributing pipeline 5-11 is rectangular, the length of rectangle is slightly less than the length of seal casinghousing (5-5), and the wide of rectangle is slightly less than the wide of seal casinghousing (5-5).Also can be as shown in figure 15, described gas distributing pipeline 5-11 has one, and in short distance bending, after bending, the shape of gas distributing pipeline 5-11 is rectangular, the length of rectangle is slightly less than the length of seal casinghousing (5-5), and the wide of rectangle is slightly less than the wide of seal casinghousing (5-5).
Certainly, can also be as shown in figure 16, described gas distributing pipeline 5-11 has multiple long gas distributing pipeline 5-11, be communicated with described air inlet 5-8 after one end parallel connection of multiple described long gas distributing pipeline 5-11, the shape of the long gas distributing pipeline 5-11 after connection is rectangular, the length of rectangle is slightly less than the length of seal casinghousing (5-5), and the wide of rectangle is slightly less than the wide of seal casinghousing (5-5).Can be again as shown in figure 16, described gas distributing pipeline 5-11 has multiple short gas distributing pipeline 5-11, be communicated with described air inlet 5-8 after one end parallel connection of multiple described short gas distributing pipeline 5-11, the shape of the short gas distributing pipeline 5-11 after connection is rectangular, the length of rectangle is slightly less than the length of seal casinghousing (5-5), and the wide of rectangle is slightly less than the wide of seal casinghousing (5-5).
Present embodiment has one owing to have employed described gas distributing pipeline, in long distance bending or the technological means in short distance bending, so available less air quantity is to moisture garbage drying.
When the described gas distributing pipeline of employing has multiple long gas distributing pipeline, be communicated with described air inlet after one end parallel connection of multiple described long gas distributing pipeline, or, described gas distributing pipeline has multiple short gas distributing pipeline, during the technological means be communicated with described air inlet after one end parallel connection of multiple described short gas distributing pipeline, then available larger air quantity is to moisture garbage drying.
As shown in Figure 18 to Figure 20, a kind of anhydration system utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems, comprise the drying bed 5 of the moisture rubbish of waste heat mummification utilizing quality coal in cement kiln systems as previously described, the air inlet 5-8 of described drying bed 5 is communicated with the waste heat gas outlet of quality coal in cement kiln systems.
Present embodiment is owing to have employed the drying bed of the moisture rubbish of waste heat mummification utilizing quality coal in cement kiln systems as previously described, the technological means that the air inlet of described drying bed is communicated with the waste heat gas outlet of quality coal in cement kiln systems, so, the residual heat resources that can make full use of cement kiln abundant carry out mummification to moisture rubbish, a large amount of energy for the moisture rubbish of mummification can be saved, shorten drying time, reduce mummification floor space and the rapid wet basis calorific value improving rubbish.
One as present embodiment is improved, as shown in figure 18, described quality coal in cement kiln systems comprises cement kiln 1, grate-cooler 2 and generator 3, described cement kiln 1 is furnished with dore furnace 1-1, described dore furnace 1-1 is furnished with one-level preheater 1-2, the grog discharging opening of described cement kiln 1 is communicated with the charging aperture of described grate-cooler 2, and the gas outlet of described grate-cooler 2 middle-temperature section is communicated with the air inlet of described generator 3; The waste heat gas outlet of described quality coal in cement kiln systems is the gas outlet of described one-level preheater 1-2, and/or, the waste heat gas outlet of described quality coal in cement kiln systems is the gas outlet of grate-cooler 2 low-temperature zone, and/or the waste heat gas outlet of described quality coal in cement kiln systems is the gas outlet of generator 3.
Present embodiment comprises cement kiln, grate-cooler and generator owing to have employed described quality coal in cement kiln systems, described cement kiln is furnished with dore furnace, described dore furnace is furnished with one-level preheater, the grog discharging opening of described cement kiln is communicated with the charging aperture of described grate-cooler, and the gas outlet of described grate-cooler middle-temperature section is communicated with the air inlet of described generator; The waste heat gas outlet of described quality coal in cement kiln systems is the gas outlet of described one-level preheater, and/or, the waste heat gas outlet of described quality coal in cement kiln systems is the gas outlet of grate-cooler low-temperature zone, and/or the waste heat gas outlet of described quality coal in cement kiln systems is the technological means of the gas outlet of generator, so, so available temperature section is more, the waste heat of one of them temperature section can be utilized according to actual conditions, or the waste heat fully utilizing multiple temperature section carries out heating and drying to moisture rubbish.
Further improve as present embodiment, as shown in figure 18, the gas outlet of described generator 3 is communicated with the air inlet 5-8 of described drying bed 5 by blower fan 3-1, the gas outlet of described blower fan 3-1 is also communicated with the air inlet of conditioning Tower 3-2, the gas outlet of described conditioning Tower 3-2 is communicated with the air inlet of raw mill 3-3, the gas outlet of described raw mill 3-3 is communicated with the air inlet of sack cleaner 3-4, and the gas outlet of described sack cleaner 3-4 is communicated with the air inlet of chimney 3-6 by blower fan 3-5.
The technological means that present embodiment is communicated with the air inlet of described drying bed by blower fan due to the gas outlet that have employed described generator, so, greatly can increase the air quantity of discharging from generator gas outlet.Gas outlet again owing to have employed described blower fan is also communicated with the air inlet of conditioning Tower, and the gas outlet of described conditioning Tower is communicated with the technological means of the air inlet of raw mill, so, can also heat raw material.Gas outlet also owing to have employed described raw mill is communicated with the air inlet of sack cleaner, the technological means that the gas outlet of described sack cleaner is communicated with the air inlet of chimney by blower fan, so, be conducive to environmental protection.
Further improve as present embodiment, as shown in figure 18, the gas outlet of described grate-cooler 2 low-temperature zone is also communicated with the air inlet of sack cleaner 4, and the gas outlet of described sack cleaner 4 is communicated with the air inlet of blower fan 4-1.
Present embodiment is also communicated with the air inlet of sack cleaner due to the gas outlet that have employed described grate-cooler low-temperature zone, and the gas outlet of described sack cleaner is communicated with the technological means of the air inlet of blower fan, so, unnecessary waste heat can be used for other side.
Also further improve as present embodiment, as shown in figure 18, the gas outlet 5-9 of described drying bed 5 is communicated with the fan air inlet of described grate-cooler 2 high temperature section, and the gas outlet of described grate-cooler 2 high temperature section is communicated with the air inlet of described dore furnace 1-1.Preferred as one, the air inlet of described dore furnace 1-1 is positioned at the bottleneck bottom this dore furnace 1-1.
Present embodiment is communicated with the fan air inlet of described grate-cooler high temperature section due to the gas outlet that have employed described drying bed, the gas outlet of described grate-cooler high temperature section is communicated with the air inlet of described dore furnace, the air inlet of described dore furnace is positioned at the technological means of the bottleneck bottom this dore furnace, so, not only can accelerate the cooling of grog, and, VOCs volatile organic matter can also be decomposed as fuel combustion in dore furnace, form innocuous substance, avoid VOCs volatile organic matter to be mixed in air and cause environmental pollution.
Further improve again as present embodiment, as shown in figure 19, described drying bed 5 has multiple, the juxtaposition distribution in the same way of multiple described drying bed 5.Certainly, also can be as shown in figure 20, described drying bed 5 has multiple, multiple described drying beds 5 radiation profiles in the same way.
Present embodiment has multiple owing to have employed described drying bed, the juxtaposition distribution in the same way of multiple described drying bed, or, the technological means of multiple described drying bed radiation profiles in the same way, so, under the condition not increasing drying bed length, can greatly increase the output of mummification rubbish.
Further improve as present embodiment, as shown in figure 18, the charging aperture 5-6 of described drying bed 5 is communicated with the discharging opening of rubbish feed bin 6 by belt feeder 7, the discharging opening 5-7 of described drying bed 5 is communicated with the charging aperture of storage bin 9 by belt feeder 8, the discharging opening of described storage bin 9 is communicated with the charging aperture of disintegrating machine 11 by belt feeder 10, the discharging opening of described disintegrating machine 11 is communicated with the charging aperture of bucket elevator 12, and the discharging opening of described bucket elevator 12 is communicated with the charging aperture of described dore furnace 1-1.
Present embodiment is communicated with by the discharging opening of belt feeder with rubbish feed bin due to the charging aperture that have employed described drying bed, the discharging opening of described drying bed is communicated with the charging aperture of storage bin by belt feeder, the discharging opening of described storage bin is communicated with the charging aperture of disintegrating machine by belt feeder, the discharging opening of described disintegrating machine is communicated with the charging aperture of bucket elevator, the technological means that the discharging opening of described bucket elevator is communicated with the charging aperture of described dore furnace, so, can realize from moisture rubbish to mummification rubbish, from mummification rubbish to shredding refuse, continuous process from shredding refuse to combustion refuse.
Further improve again as present embodiment, as shown in figure 19, the shape of described rubbish feed bin 6 is elongated, the side of described rubbish feed bin 6 is distributed with multiple charging aperture, the opposite side of described rubbish feed bin 6 is distributed with multiple discharging opening, and the shape of described storage bin 9 is elongated, and the side of described storage bin 9 is distributed with multiple charging aperture, the opposite side of described storage bin 9 is distributed with multiple discharging opening, and described rubbish feed bin 6 and described storage bin 9 are in parallel distribution.Certainly, also can be as shown in figure 20, the shape of described rubbish feed bin 6 is small curve circular arc, the convex side of described rubbish feed bin 6 is distributed with multiple charging aperture, the recessed side of described rubbish feed bin 6 is distributed with multiple discharging opening, the shape of described storage bin 9 is deep camber circular arc, and the convex side of described storage bin 9 is distributed with multiple charging aperture, and the recessed middle side part that the recessed side of described storage bin 9 is distributed with multiple discharging opening or described storage bin 9 is provided with a discharging opening.
Present embodiment due to the shape that have employed described rubbish feed bin elongated, the side of described rubbish feed bin is distributed with multiple charging aperture, the opposite side of described rubbish feed bin is distributed with multiple discharging opening, the shape of described storage bin is elongated, the side of described storage bin is distributed with multiple charging aperture, and the opposite side of described storage bin is distributed with multiple discharging opening, and described rubbish feed bin and described storage bin are the technological means of parallel distribution, so, be not only conducive to the parallel distribution of drying bed.When the shape adopting described rubbish feed bin is small curve circular arc, the convex side of described rubbish feed bin is distributed with multiple charging aperture, the recessed side of described rubbish feed bin is distributed with multiple discharging opening, the shape of described storage bin is deep camber circular arc, the convex side of described storage bin is distributed with multiple charging aperture, the recessed middle side part that the recessed side of described storage bin is distributed with multiple discharging opening or described storage bin is provided with the technological means of a discharging opening, be then conducive to the radiation profiles of drying bed.
Moisture content is Beijing transfer station house refuse 300t/d of 63.5%, is laid in by rubbish and has on the drying bed of borehole structure, and rubbish thickness is 20 centimetres; The bed board of drying bed is steel plate, is covered with circular hole, and bore dia is 20 millimeters.Drying bed width is 35 meters, and length is 150 meters; Inner block is adopted to have the high temperature resistant airduct of refractory material by cement kiln tail 350 degree of waste gas, 75000m
3/ h reverse feeding garbage drying bed, that is: waste gas is contrary with the traffic direction of garbage drying bed, carries out rubbish heat drying.The speed of service controlling drying bed is 0.56 m/min, and drying time is 4.5 hours, and after heat drying, the moisture content of house refuse is reduced to 18.9% from 63.5%.The high temperature section that the VOCs material that mummification produces sends grate-cooler 850 degree back to cools grog as cooling-air, the oxygen content of generation be 8% gas mix with tertiary air, feeding dore furnace; By after mummification, moisture content be 18.9% rubbish deliver to warehouse by chain scraper conveyor, cement kiln dore furnace is admitted to by elevator after being crushed to 80mm, the oxygen content adopting mixing to produce is that rubbish not exclusively burns by the tertiary air of the gas of 9.5%, can reduce cement kiln nitrogen oxide 8.6%.
Moisture content is the house refuse 200t/d of Beijing's composting plant of 55%, is laid in by rubbish and has on the drying bed of borehole structure, and rubbish thickness is 25 centimetres; Drying bed is steel plate, is covered with circular hole, and bore dia is 25 millimeters.Drying bed width is 45 meters, and length is 160 meters; Inner block is adopted to have the high temperature resistant airduct of refractory material by cement kiln tail 375 degree of waste gas, 50000m
3/ h reverse feeding garbage drying bed, that is: waste gas is contrary with the traffic direction of garbage drying bed, carries out rubbish heat drying.The speed of service controlling drying bed is 0.7 m/min, and drying time is 4.0 hours, and after heat drying, the moisture content of house refuse is reduced to 17.5% from 55%.The high temperature section that the VOCs material that mummification produces sends grate-cooler 900 degree back to cools grog as cooling-air, the oxygen content of generation be 9.8% gas mix with tertiary air, feeding dore furnace; By after mummification, moisture content be 17.5% rubbish deliver to warehouse by chain scraper conveyor, cement kiln dore furnace is admitted to by elevator after being crushed to 100mm, the oxygen content adopting mixing to produce is that rubbish not exclusively burns by the tertiary air of the gas of 10%, can reduce cement kiln nitrogen oxide 7.8%.
Moisture content is the old screen residue of waste 500t/d of Beijing's landfill yard of 45%, is laid in by rubbish and has on the drying bed of borehole structure, and rubbish thickness is 25 centimetres; Drying bed is steel plate, is covered with circular hole, and bore dia is 30 millimeters.Drying bed width is 40 meters, and length is 100 meters; Inner block is adopted to have the high temperature resistant airduct of refractory material by cement kiln tail 280 degree of waste gas, 50000m
3/ h reverse feeding garbage drying bed, that is: waste gas is contrary with the traffic direction of garbage drying bed, carries out rubbish heat drying.The speed of service controlling drying bed is 0.56 m/min, and drying time is 3.0 hours, and after heat drying, the moisture content of house refuse is reduced to 15% from 45%.The high temperature section that the VOCs material that mummification produces sends grate-cooler 800 degree back to cools grog as cooling-air, the oxygen content of generation be 7.5% gas mix with tertiary air, feeding dore furnace; By after mummification, moisture content be 15% rubbish deliver to warehouse by chain scraper conveyor, cement kiln dore furnace is admitted to by elevator after being crushed to 60mm, the oxygen content adopting mixing to produce is that rubbish not exclusively burns by the tertiary air of the gas of 9.3%, can reduce cement kiln nitrogen oxide 8.9%.
Claims (10)
1. utilize a method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems, it is characterized in that: utilize in quality coal in cement kiln systems the tail gas with waste heat to heat moisture rubbish, moisture rubbish forms mummification rubbish by heat drying.
2. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: described quality coal in cement kiln systems comprises cement kiln (1), grate-cooler (2) and generator (3), described cement kiln (1) is furnished with dore furnace (1-1), described dore furnace (1-1) is furnished with one-level preheater (1-2), the grog discharging opening of described cement kiln (1) is communicated with the charging aperture of described grate-cooler (2), and the gas outlet of described grate-cooler (2) middle-temperature section is communicated with the air inlet of described generator (3); The described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in one-level preheater (1-2) with waste heat to heat moisture rubbish to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in the low-temperature zone of grate-cooler (2) with waste heat to heat moisture rubbish to moisture rubbish heating; And/or the described tail gas with waste heat of utilizing in quality coal in cement kiln systems is drawn by the tail gas in generator (3) with waste heat to heat moisture rubbish to moisture rubbish heating.
3. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 2, it is characterized in that:
Described is that the tail gas will from the gas outlet of one-level preheater (1-2) with waste heat is drawn by the tail gas extraction in one-level preheater (1-2) with waste heat, when the tail gas in one-level preheater (1-2) with waste heat being drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler (2) high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler (2), and send into dore furnace (1-1) through the high temperature section gas outlet of grate-cooler (2) after mixing with tertiary air,
Described extraction by the tail gas in grate-cooler (2) with waste heat is that the tail gas gas outlet of grate-cooler (2) low-temperature zone with waste heat is drawn, when the tail gas in grate-cooler (2) low-temperature zone with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces the fan air inlet of grate-cooler (2) high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler (2), and send into dore furnace (1-1) through the high temperature section gas outlet of grate-cooler (2) after mixing with tertiary air;
Described extraction by the tail gas in generator (3) with waste heat is drawn from generator (3) gas outlet by the tail gas with waste heat, when the tail gas in generator (3) with waste heat is drawn after to moisture rubbish heating, tail gas after heat release introduces grate-cooler (2) high temperature section together with the steam of discharging in moisture rubbish after heating and VOCs volatile organic matter, to the clinker cooling in grate-cooler, and send into dore furnace (1-1) through the high temperature section gas outlet of grate-cooler (2) after mixing with tertiary air.
4. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: the temperature of described grate-cooler (2) high temperature section is 800 ~ 900 degrees Celsius.
5. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: the exhaust temperature of described quality coal in cement kiln systems is 100 ~ 400 degrees Celsius.
6. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 5, it is characterized in that: the exhaust temperature of described quality coal in cement kiln systems is 100 ~ 200 degrees Celsius, 200 ~ 300 degrees Celsius or 300 ~ 400 degrees Celsius.
7. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: moisture rubbish is in tiling and motion state in the process of heating, and the direction of motion of described tail gas is contrary with the direction of motion of moisture rubbish.
8. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 7, it is characterized in that: the air quantity of described tail gas is 23000m
3/ h ~ 85000m
3/ h, the speed of service of moisture rubbish is 0.6 ~ 1.5 m/min, and drying time is 3 ~ 5 hours.
9. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: send after mummification refuse breaking to 50mm ~ 120mm into quality coal in cement kiln systems, and in dore furnace imperfect combustion.
10. utilize the method for the moisture rubbish of waste heat mummification of quality coal in cement kiln systems according to claim 1, it is characterized in that: described moisture rubbish carries out by the process of heat drying in seal cavity.
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| CN105222601B (en) | 2017-04-19 |
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