CN1654378A - Method for drying sludge by residual heat from boiler fume - Google Patents
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- CN1654378A CN1654378A CN 200510048978 CN200510048978A CN1654378A CN 1654378 A CN1654378 A CN 1654378A CN 200510048978 CN200510048978 CN 200510048978 CN 200510048978 A CN200510048978 A CN 200510048978A CN 1654378 A CN1654378 A CN 1654378A
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- 238000001035 drying Methods 0.000 title claims abstract description 84
- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003517 fume Substances 0.000 title claims abstract description 17
- 239000010865 sewage Substances 0.000 claims abstract description 32
- 239000011449 brick Substances 0.000 claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- 239000008187 granular material Substances 0.000 claims description 34
- 239000002245 particle Substances 0.000 claims description 32
- 239000000843 powder Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003546 flue gas Substances 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000008188 pellet Substances 0.000 abstract 2
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- 238000004064 recycling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000010801 sewage sludge Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000002354 daily effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003653 coastal water Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011451 fired brick Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Abstract
The method of utilizing boiler fume afterheat in drying sludge is to dry sludge from sewage works at low temperature condition with boiler fume afterheat in a two-section or three-section process and to form hard sludge pellets one 1-6 mm size. The sludge pellets may be used as the auxiliary fuel for boiler and in baking light brick and cement product. The present invention has low cost and opens one way of utilizing waste in treating waste. The present invention results in high environment utility, economic utility and social utility.
Description
Technical field
The present invention relates to a kind of method of utilizing the residual heat from boiler fume dewatered sludge.
Background technology
City domestic sewage and trade effluent be through the processing of sewage work, could discharge after reaching state sewage emission standard, and this is an environmental engineering measure of preserving the ecological environment and must carry out.City domestic sewage and trade effluent enter sewage work by the sewage network system, in being purified the process of processing, most pollutents in the sewage are transferred in the mud, it is big that this mud that makes sewage work produce has quantity, and the characteristics of enrichment high density pollution thing and heavy metal, therefore, if these mud can not get dealing carefully with, can cause serious secondary pollution to environment.
Urban sewage treatment system comprises water treatment and sludge treatment two portions, China is to the treatment technology of city domestic sewage and trade effluent, the external imported technology of main employing, but, owing to also do not have a kind of effective sludge treatment technology to use for reference so far in the world, therefore, at present, the method of disposal that the domestic city sludge of sewage treatment plant mainly takes interim heap to bury, and in fact peri-urban can not have space and the place that is fit to stack this class mud, and the interim secondary environmental pollution problem of burying and producing of piling of mud is sharp-pointed day by day.The method by burning is attempted in some place, make sludge reduction, but sludge incineration facility investment volume height, energy-output ratio is big, and the working cost costliness adds that mud is when burning, may to atmospheric environment bring pollute and burn after residue reason such as still need dispose, according to the present situation of China, sludge incineration is handled and is difficult to economically bear, and goes back imperfection technically.More local hope can be with the mud as fertilizer sources, be used for agricultural or greening, but, each contained heavy metal species has limited the adaptability (table 1) that soil utilizes mud in the mud, according to studies show that, from waste water, remove the heavy metal of 1mg/L, will in mud, accumulate the heavy metal of 10000mg/L
The content of heavy metal in the table 1 typical urban sludge of sewage treatment plant
| Project | Heavy metal (mg/kg) | Remarks | |||||||
| ??Cu | ??Pb | ????Zn | ????Cr | ??Cd | ????Ni | ????As | ????Hg | ||
| Mean value | ??326.6 | ??192.9 | ????2261 | ????296.3 | ??4.1 | ????297.4 | ????16.9 | ????3.9 | According to 4 years analysis data |
| Content range | ??236.2- ??397.2 | ??80.78- ??314.0 | ????69.5- ????3790 | ????27.9- ????592.4 | ??1.35- ??7.2 | ????57.5- ????750.3 | ????8.9- ????31.9 | ????0.8- ????4.3 | |
Their meeting enrichments in soil, and enter food chain by the absorption of crop, finally jeopardize the health of human body, even some mud is from sanitary sewage, though heavy metal content is lower, but the various medicaments that add in contained pathogenic agent and the sewage treatment process in the mud all can bring harm to environment.Some coastal city or those have and the city of waterway mutually, ocean, may adopt mud directly to throw the disposal method in sea, and this can pollute coastal waters; Marine ecosystems are threatened; therefore, this method is subjected to environment protection circle and the public's severe criticism, is prohibited.
Along with increasing rapidly of China's rapid economy development and urban population, the quantity of trade effluent and city domestic sewage also will constantly increase, meanwhile people are more and more higher to the requirement of environmental quality, trade effluent and domestic sewage treating rate also will improve constantly, the quantity that this means sludge of sewage treatment plant will grow with each passing day, therefore, open up one municipal sludge carried out the effective way of innoxious, minimizing and recycling treatment, imperative.Sludge drying, it is the necessary process that realizes sewage treatment plant sludge harmless, minimizing and recycling treatment, mud from sewage work's generation, by mechanical dehydration, water ratio generally between 75-85%, make mud obtain mummification, the water ratio of mud is dropped to below 30%, need to consume a large amount of energy, thereby the cost of sludge drying is improved greatly, this is a major cause being difficult to carry out of sewage sludge harmlessness, minimizing and recycling treatment just.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing the residual heat from boiler fume dewatered sludge.
A kind of step of the method for residual heat from boiler fume dewatered sludge of utilizing is:
1) is the flue gas of 150-200 ℃ boiler with temperature, after the electrostatic precipitator dedusting, with this flue gas, delivers to respectively in the first revolution drying kiln and the second revolution drying kiln, carry out the two-part dewatered sludge by flue with induced draft fan;
2) with water ratio be the sludge of sewage treatment plant of 70-80% by even machine, make the mud homogenizing, by banded extruder, be made into the bar column then, with backflow dry fines mud, make bar column mud wrap up in powder;
3) the above-mentioned bar column mud of wrapping up in powder is admitted to first drying kiln, carries out the fs mummification, and making provides the hot blast rate of sludge drying to remain on 130000-160000m
3/ hour, through the mummification of fs, remove the moisture content of mud 25-35%;
4) behind the above-mentioned mud kiln discharge,,, particle diameter is refluxed with the mud granule of particle diameter less than 1 millimeter greater than 6 millimeters, mix with primary sludge through roto-sifter by the cold wind conveying belt;
5) particle diameter is that the mud granule of 1-6 millimeter is admitted to second revolution drying kiln, carries out the subordinate phase mummification, and making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 30-40%;
6) behind the above-mentioned mud kiln discharge through the two-part drying process; pass through vibratory screening apparatus; particle diameter refluxes less than 1 millimeter mud granule; the powder of wrapping up in as bar column mud; particle diameter is the mud granule of 1-6 millimeter; as the auxiliary fuel of boiler, as the raw material of firing light energy saving brick and production cement pressing products.
Described two-stage sludge mummification, first revolution drying kiln diameter is 2.0-2.4m, and long is 20-26m, and second revolution drying kiln diameter is 1.8-2.2m, and length is 18-24m.
Another kind utilizes the step of the method for residual heat from boiler fume dewatered sludge to be:
1) is the flue gas of 150-200 ℃ boiler with temperature, after the electrostatic precipitator dedusting, with this flue gas, delivers to respectively in the first revolution drying kiln, the second revolution drying kiln and the 3rd revolution drying kiln, carry out the syllogic dewatered sludge by flue with induced draft fan;
2) with water ratio be the sludge of sewage treatment plant of 70-80% by even machine, make the mud homogenizing, by banded extruder, be made into the bar column then, with backflow dry fines mud, make bar column mud wrap up in powder;
3) the above-mentioned bar column mud of wrapping up in powder is admitted to first drying kiln, carries out the fs mummification, and making provides the hot blast rate of sludge drying to remain on 60000-80000m
3/ hour, through the mummification of fs, remove the moisture content of mud 20～25%;
4) behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, be admitted to second revolution drying kiln, carry out the subordinate phase mummification, making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 20～25%;
5) behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, through roto-sifter, send the auxiliary fuel of boiler as fire coal with particle diameter greater than 6 millimeters mud granule, particle diameter refluxes less than 1 millimeter mud granule, as the powder of wrapping up in of bar column mud;
6) particle diameter is that the mud granule of 1-6 millimeter is admitted to the 3rd revolution drying kiln, carries out the phase III mummification, and making provides the hot blast rate of sludge drying to remain on 30000-50000m
3/ hour, through the mummification of phase III, remove the moisture content of mud 15～20%;
7) behind the above-mentioned mud kiln discharge through the syllogic drying process; pass through vibratory screening apparatus; particle diameter refluxes less than 1 millimeter mud granule; the powder of wrapping up in as bar column mud; particle diameter is the mud granule of 1-6 millimeter; as the auxiliary fuel of boiler, as the raw material of firing light energy saving brick and production cement pressing products.
Described syllogic sludge drying, first revolution drying kiln diameter is 1.6-2.0m, and long is 20-24.0m, and second revolution drying kiln diameter is 1.5-1.8m, and length is 18.0-22.0, and the 3rd revolution drying kiln diameter is 1.2-1.5m, and length is 15.0-18.0m.
Advantage of the present invention:
1) residual heat from boiler fume is utilized to dewatered sludge, not only innoxious, minimizing and the recycling treatment for sludge from wastewater treatment plant provides primary condition, make flue gas simultaneously in the process of dewatered sludge, by the revolution drying kiln, temperature has been reduced to 50-80 ℃, through tornado dust collector, enter water dust scrubber, pass through induced draft fan, send into chimney, qualified discharge has reduced temperature on the one hand significantly, make flue dust obtain more effective control on the other hand, finally make the discharging of flue gas reach national atmospheric emission standard;
2) utilize the residual heat from boiler fume dewatered sludge, owing to adopted two-part or syllogic drying process process, even the revolution drying kiln needs maintenance, other revolution drying kiln still can make the smooth and easy discharge of flue gas, therefore makes the normal operation of boiler can not arrive influenced;
3) the present invention makes mud obtain mummification under cold condition, thereby makes mud keep original calorific value (being the most important value that mud can be utilized as resource), and the mud after the mummification can be used as the auxiliary fuel of boiler.In addition, according to test-results, play the coagulating agent of consolidation in the mud, greater than 200 ℃ the time, begin volatilization, therefore, utilize the mud of residual heat from boiler fume mummification, guaranteed that the coagulating agent in the mud is not damaged, can play consolidation, thereby make the hardness of mud granule satisfy the technical requirements of firing light energy saving brick and producing the cement pressed brick;
4) utilize the residual heat from boiler fume dewatered sludge, can be under the situation that need not consume new forms of energy, the water ratio of sludge of sewage treatment plant is reduced, mud drying process is moved under lower Financial cost, be difficult to be put to actual bottleneck problem thereby overcome because of the economic cost height makes sewage sludge harmlessness, minimizing and recycling treatment.In fact this opened up a cyclic utilization of waste, the effective way of the treatment of wastes with processes of wastes against one another, not only can produce significant social and environmental benefit, and can obtain tangible economic benefit, the present invention has dropped into practice in Jiangyin, Jiangsu, practice shows, adopts this technology not only to make industry and sanitary sewage mud obtain effectively innoxious and recycling treatment, and make the complete qualified discharge of flue gas, obtain significant social, environment and economic triple benefit.
Embodiment
The present invention utilizes residual heat from boiler fume, by two-part or syllogic drying process, makes sludge of sewage treatment plant obtain mummification under cold condition, and the formation particle diameter is the hard mud granule of 1-6 millimeter.This mud granule can be used as the auxiliary fuel of boiler, also can fire light energy saving brick and produce cement pressing products.
The present invention is to be 150-200 ℃ boiler smoke with temperature, after the electrostatic precipitator dedusting,, delivers to respectively in two revolution drying kilns through flue this flue gas with induced draft fan, carries out the two-part dewatered sludge.First revolution drying kiln diameter is 2.0-2.4m, and long is 20-26m, and second revolution drying kiln diameter is 1.8-2.2m, and length is 18-24m.With water ratio be the sludge of sewage treatment plant of 70-80% by even machine, make the mud homogenizing, by banded extruder, they are made the bar column then.With backflow dry fines mud, after making bar column mud wrap up in powder, be admitted to first drying kiln, carry out the fs mummification, under the windsheild control that is installed between smoke conveying duct and the revolution drying kiln, making provides the hot blast rate of sludge drying to remain on 130000-160000m
3/ hour, through the mummification of fs, remove the moisture content of mud 25-30%.Behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, make mud in the process of cooling, further reduce water ratio, cooled mud, through roto-sifter, particle diameter is refluxed with the mud granule of particle diameter less than 1 millimeter greater than 6 millimeters, mix with primary sludge, this not only can reduce the initial aqueous rate of mud, also is extruded into the bar column for mud is easier and creates conditions; Particle diameter is that the mud granule of 1-6 millimeter is admitted to second revolution drying kiln, carries out the subordinate phase mummification, and under the windsheild control that is installed between smoke conveying duct and the revolution drying kiln, making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 30-40%.
Another kind of method of the present invention is to be 150-200 ℃ boiler smoke with temperature, after the electrostatic precipitator dedusting,, deliver to respectively in the first revolution drying kiln, the second revolution drying kiln and the 3rd revolution drying kiln this flue gas with induced draft fan, carry out the syllogic dewatered sludge by flue.First revolution drying kiln diameter is 1.6-2.0m, and long is 20-24.0m, and second revolution drying kiln diameter is 1.5-1.8m, and length is 18.0-22.0, and the 3rd revolution drying kiln diameter is 1.2-1.5m, and length is 15.0-18.0m.With water ratio is that the sludge of sewage treatment plant of 70-80% is by even machine, make the mud homogenizing, pass through banded extruder then, be made into the bar column, with backflow dry fines mud, make bar column mud wrap up in powder after, send into first drying kiln, carry out the fs mummification, under the windsheild control that is installed between smoke conveying duct and the revolution drying kiln, making provides the hot blast rate of sludge drying to remain on 60000-80000m
3/ hour, through the mummification of fs, can remove the moisture content of mud 20～25%.Behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, be admitted to second revolution drying kiln, carry out the subordinate phase mummification, under the windsheild control that is installed between smoke conveying duct and the revolution drying kiln, making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 20～25%.Behind the above-mentioned mud kiln discharge; by the cold wind conveying belt; through roto-sifter; send the auxiliary fuel of boiler as fire coal with particle diameter greater than 6 millimeters mud granule, particle diameter refluxes less than 1 millimeter mud granule, as the powder of wrapping up in of bar column mud; particle diameter is that the mud granule of 1-6 millimeter is admitted to the 3rd revolution drying kiln; carry out the phase III mummification, under the windsheild control that is installed between smoke conveying duct and the revolution drying kiln, making provides the hot blast rate of sludge drying to remain on 30000-50000m
3/ hour, through the mummification of phase III, remove the moisture content of mud 15～20%.
Above-mentioned through behind the mud kiln discharge after two-part or the syllogic mummification; pass through vibratory screening apparatus; particle diameter refluxes less than 1 millimeter mud granule; the powder of wrapping up in as bar column mud; particle diameter is the mud granule of 1-6 millimeter; can be used as the auxiliary fuel of boiler, also can fire light energy saving brick (patent of invention number: ZL 981 18046.9) and produce cement pressing products (application for a patent for invention number: raw material 200410068173.3).By the flue gas of revolution drying kiln, temperature has been reduced to 50-70 ℃, through the tornado dust collector dedusting, enters the further dedusting degasification of water dust scrubber, by induced draft fan, sends into chimney, qualified discharge.
Example 1, about 80 tons of the trade effluent of Jiangyin, Jiangsu daily output water ratio 70-80% and sanitary sewage mud utilize 150-200 ℃ boiler smoke, and behind the two-part drying process, moisture percentage in sewage sludge drops to 15-20%, and the formation particle diameter is a 1-6 millimeter mud granule.This mud granule has kept the calorific value of primary sludge more than 90%, and with its auxiliary fuel as boiler, the calorific value that dewatered sludge per ton produces is equivalent to 1/3rd of standard coal calorific value, can save coal-fired 7-8 ton every day.
Example 2, about 80 tons of the trade effluent of Jiangyin, Jiangsu daily output water ratio 70-80% and sanitary sewage mud utilize 150-200 ℃ boiler smoke, and behind the two-part drying process, moisture percentage in sewage sludge drops to 15-20%, and the formation particle diameter is a 1-6 millimeter mud granule.The hardness of this mud granule meets the requirement of firing light energy saving brick, fire the raw material of light energy saving brick with its conduct, save clay resource 15-25% than ordinary fired brick, save energy 10-15%, the ultimate compression strength of light energy saving brick be up to state standards (GB5101-85).
Example 3, about 80 tons of the trade effluent of Jiangyin, Jiangsu daily output water ratio 70-80% and sanitary sewage mud utilize the flue gas of 150-200 ℃ boiler, behind the two-part drying process, moisture percentage in sewage sludge drops to 15-20%, and the formation particle diameter is a 1-6 millimeter mud granule.The hardness of this mud granule meets the requirement of producing cement pressing products, as the raw material of producing cement pressing products (side walk slab's brick, grass planting brick, kerbstone and cement pressed brick), indexs such as their ultimate compression strength, folding strength and frost resistance intensity all can be up to state standards (GB8239-1997) and national building material industry standard (JC446-91) with it.
Claims (4)
1. a method of utilizing the residual heat from boiler fume dewatered sludge is characterized in that, the step of method is:
1) with temperature is 150-200 ℃ boiler smoke, after the electrostatic precipitator dedusting, with this flue gas, delivers to respectively in the first revolution drying kiln and the second revolution drying kiln, carry out the two-part dewatered sludge by flue with induced draft fan;
2) with water ratio be the sludge of sewage treatment plant of 70-80% by even machine, make the mud homogenizing, by banded extruder, be made into the bar column then, with backflow dry fines mud, make bar column mud wrap up in powder;
3) the above-mentioned bar column mud of wrapping up in powder is admitted to first drying kiln, carries out the fs mummification, and making provides the hot blast rate of sludge drying to remain on 130000-160000m
3/ hour, through the mummification of fs, remove the moisture content of mud 25-35%;
4) behind the above-mentioned mud kiln discharge,,, particle diameter is refluxed with the mud granule of particle diameter less than 1 millimeter greater than 6 millimeters, mix with primary sludge through roto-sifter by the cold wind conveying belt;
5) particle diameter is that the mud granule of 1-6 millimeter is admitted to second revolution drying kiln, carries out the subordinate phase mummification, and making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 30-40%;
6) behind the above-mentioned mud kiln discharge through the two-part drying process; pass through vibratory screening apparatus; particle diameter refluxes less than 1 millimeter mud granule; the powder of wrapping up in as bar column mud; particle diameter is the mud granule of 1-6 millimeter; as the auxiliary fuel of boiler, as the raw material of firing light energy saving brick and production cement pressing products.
2. a kind of method of utilizing the residual heat from boiler fume dewatered sludge according to claim 1 is characterized in that, described two-stage sludge mummification, first revolution drying kiln diameter is 2.0-2.4m, long is 20-26m, and second revolution drying kiln diameter is 1.8-2.2m, and long is 18-24m.
3. a method of utilizing the residual heat from boiler fume dewatered sludge is characterized in that, the step of method is:
1) with temperature is 150-200 ℃ boiler smoke, after the electrostatic precipitator dedusting, with this boiler smoke, delivers to respectively in the first revolution drying kiln, the second revolution drying kiln and the 3rd revolution drying kiln, carry out the syllogic dewatered sludge by flue with induced draft fan;
2) with water ratio be the sludge of sewage treatment plant of 70-80% by even machine, make the mud homogenizing, by banded extruder, be made into the bar column then, with backflow dry fines mud, make bar column mud wrap up in powder;
3) the above-mentioned bar column mud of wrapping up in powder is admitted to first drying kiln, carries out the fs mummification, and making provides the hot blast rate of sludge drying to remain on 60000-80000m
3/ hour, through the mummification of fs, remove the moisture content of mud 20-25%;
4) behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, be admitted to second revolution drying kiln, carry out the subordinate phase mummification, making provides the hot blast rate of sludge drying to remain on 50000-70000m
3/ hour, through the mummification of subordinate phase, remove the moisture content of mud 20-25%;
5) behind the above-mentioned mud kiln discharge, by the cold wind conveying belt, through roto-sifter, send the auxiliary fuel of boiler as fire coal with particle diameter greater than 6 millimeters mud granule, particle diameter refluxes less than 1 millimeter mud granule, as the powder of wrapping up in of bar column mud;
6) particle diameter is that the mud granule of 1-6 millimeter is admitted to the 3rd revolution drying kiln, carries out the phase III mummification, and making provides the hot blast rate of sludge drying to remain on 30000-50000m
3/ hour, through the mummification of phase III, remove the moisture content of mud 15～20%;
7) behind the above-mentioned mud kiln discharge through the syllogic drying process; pass through vibratory screening apparatus; particle diameter refluxes less than 1 millimeter mud granule; the powder of wrapping up in as bar column mud; particle diameter is the mud granule of 1-6 millimeter; as the auxiliary fuel of boiler, as the raw material of firing light energy saving brick and production cement pressing products.
4. a kind of method of utilizing the residual heat from boiler fume dewatered sludge according to claim 3, it is characterized in that, described syllogic sludge drying, first revolution drying kiln diameter is 1.6-2.0m, long is 20-24.0m, and second revolution drying kiln diameter is 1.5-1.8m, and long is 18.0-22.0, the 3rd revolution drying kiln diameter is 1.2-1.5m, and long is 15.0-18.0m.
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| CNB2005100489786A CN1294091C (en) | 2005-01-21 | 2005-01-21 | Method for drying sludge by residual heat from boiler fume |
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| CNB2005100489786A CN1294091C (en) | 2005-01-21 | 2005-01-21 | Method for drying sludge by residual heat from boiler fume |
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| CN1294091C CN1294091C (en) | 2007-01-10 |
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| CN100336752C (en) * | 2006-05-30 | 2007-09-12 | 浙江大学 | Circulation-type energy-saving sludge drying method |
| CN100340505C (en) * | 2005-09-30 | 2007-10-03 | 华南理工大学 | Simultaneous sludge method during cement production |
| CN100364906C (en) * | 2006-02-17 | 2008-01-30 | 浙江大学 | Method for drying sludge using combined flume residual heat and supplied heat |
| CN100457656C (en) * | 2006-07-04 | 2009-02-04 | 浙江大学 | Series type energy-saving sludge drying and granulating system |
| CN101792247A (en) * | 2010-03-19 | 2010-08-04 | 杭州新源环境工程有限公司 | Sludge treatment method capable of combining powerful dehydration with low-temperature mummification |
| CN101570388B (en) * | 2009-05-26 | 2010-11-03 | 华电滕州新源热电有限公司 | Harmless recycling treatment process for urban sludge |
| CN102161557A (en) * | 2011-03-10 | 2011-08-24 | 北京科技大学 | Method for treating excess sludge |
| CN101643307B (en) * | 2009-08-25 | 2011-08-31 | 浙江大学 | Method for utilizing fume afterheat of cement plant to heat-dry sludge and prepare cement by firing sludge |
| CN101565263B (en) * | 2009-05-21 | 2011-10-19 | 山东天力干燥股份有限公司 | Sludge superheated vapor drying system of two-stage paddle dryer and drying process thereof |
| CN113860697A (en) * | 2021-11-08 | 2021-12-31 | 抚顺新钢铁有限责任公司 | Iron and steel waste heat and municipal sludge synergistic harmless treatment process |
| CN114262120A (en) * | 2021-12-20 | 2022-04-01 | 山东恒鑫生物科技有限公司 | Gelatin wastewater treatment process beneficial to environmental protection |
Family Cites Families (5)
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| JPH10230296A (en) * | 1997-02-18 | 1998-09-02 | Seibutsu Kankyo Syst Kogaku Kenkyusho:Kk | Granulating method of waste sludge and waste soil |
| CN1214323A (en) * | 1998-11-16 | 1999-04-21 | 朱平生 | Sludge treating process |
| US6406510B1 (en) * | 1999-12-09 | 2002-06-18 | Unified Environmental Services Group, Llc | Methods for treating wastewater sludge |
| CN1232457C (en) * | 2001-02-27 | 2005-12-21 | 天津水泥工业设计研究院 | Treating method of industrial and domestic sludge |
| CN1381316A (en) * | 2001-04-17 | 2002-11-27 | 上海华标质量认证咨询有限公司 | Process for treating sludge of sewer |
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| CN101643307B (en) * | 2009-08-25 | 2011-08-31 | 浙江大学 | Method for utilizing fume afterheat of cement plant to heat-dry sludge and prepare cement by firing sludge |
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| CN102161557B (en) * | 2011-03-10 | 2013-01-30 | 北京科技大学 | Method for treating excess sludge |
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| CN114262120A (en) * | 2021-12-20 | 2022-04-01 | 山东恒鑫生物科技有限公司 | Gelatin wastewater treatment process beneficial to environmental protection |
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