CN101792247A - Sludge treatment method capable of combining powerful dehydration with low-temperature mummification - Google Patents
Sludge treatment method capable of combining powerful dehydration with low-temperature mummification Download PDFInfo
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Abstract
The invention discloses a sludge treatment method capable of combining powerful dehydration with low-temperature mummification. In the method, sewage treatment plant sludge or river and lake dredging sludge is performed with the powerful dehydration process to ensure that the moisture content of the sludge is minimized in the mechanical dehydration process; then, flue gas waste heat discharged by thermal power plants and cement plants or an independent heat source is utilized to carry out mummification and granulation in a rotary sludge mummification granulation device, the volume of the sludge is reduced to be below 1/3 of the original volume, and more than 90% of the original heat value is stored; and mummified sludge particles can serve as fire coal auxiliary fuels and raw materials for manufacturing cement and also can burn light energy-saving bricks, ceramsites and the like. The invention uses waste to treat waste, leads municipal sludge to obtain harmless and recycling treatment and can produce obvious social and environmental benefits.
Description
Technical field
The present invention relates to a kind of powerful dehydration and low temperature mummification bonded method for sludge treatment.
Background technology
Eleventh Five-Year Plan according to national environmental protection Eleventh Five-Year Plan and processing of national town sewage and regeneration Facilities Construction, all to build sewage treatment facility to all cities of China in 2010, treatment rate of domestic sewage is not less than 70%, estimate that the National urban sewage treatment capacity will be above 100,000,000 ton per days, simultaneously can estimate that the mud of supervening (about water ratio 80%) will be up to 3,000 ten thousand tons/year, add and pollute lake, river dredging mud and municipal sewage system mud etc., not only quantity is very huge for the annual municipal sludge that produces, and annually also increases with 10～15% rate of increase.How safety economy ground treatment and disposal municipal sludge is the environmental problem that the world faces jointly, and it is very urgent especially concerning China to solve this global problem.
Sludge of sewage treatment plant is to carry out the sedimentable matter that produces in the decontamination process at city domestic sewage and trade effluent, it is a kind of solid-liquid mixture, heterogeneous body by complexity such as organic relic, bacterium thalline, inorganic particle, colloids is formed, be called as biosolids (Biosolid), being known as is a kind of elementary organic solid product that can recycling.It is bulky because the water ratio of mud is high, and contain various pathogeny microorganisms and hazardous and noxious substances such as multiple organic and inorganic pollutent and heavy metal, in 192 kinds of compounds that from mud, are detected, there are 99 kinds to be confirmed as hazardous compound, therefore, sewage sludge also is the great solid waste of a class hazardness, if do not handle completely and control, will cause serious secondary pollution to ecotope, how not only safety but also economically sewage sludge become the environment difficult problem that the world faces jointly.The problem that faces the sludge treatment difficulty abroad is early than China's many decades, the external sludge treatment method of disposal of setting up in long-term practice mainly contains sanitary landfill, burning and soil utilization etc., and these methods are implemented three prerequisites: the one, need enough mud landfill space; The 2nd, need bear expensive facility investment and very high working cost; The 3rd, the content of objectionable impurities in the mud such as heavy metal etc. there is strict restricted condition.And China is except also bearing economically the too high sludge treatment expense, the more important thing is that China's municipal sludge has two tangible characteristics, the one, the quantity of mud and volume are big especially, and mainly concentrate on surrounding city, are not fit to the space of mud landfill at all; The 2nd, handle because sanitary sewage and trade effluent merge, thereby make the composition of mud very complicated, particularly heavy metal content is very high, and the soil utilization of mud is restricted.Obviously, external method for sludge treatment can't be used for reference by China.
At present, after preliminary treatment is only passed through to sludge from wastewater treatment plant and lake, river dredging mud by China, just store up disorderly or simple landfill temporarily, not only spend a large amount of funds and take a large amount of land resources, and cause serious secondary pollution to ecotope, particularly ooze under the sewage in the mud, be unable to estimate especially to the harm that groundwater resource bring, and in fact peri-urban can not have space and the place that is fit to stack this class mud, the interim heap of mud buries the harm of the secondary environmental pollution that is produced, and has in fact offset the environmental benefit of the sewage disposal and the training of channel.Face the reality that environmental problem is sharp-pointed day by day and mud harm increasingly sharpens that mud causes, people attempt utilizing the mud as fertilizer sources, be used for agricultural or greening, but, each contained heavy metal species has limited the adaptability that soil utilizes mud in the mud, studies show that, from waste water, remove the heavy metal of 1mg/L, will in mud, accumulate the heavy metal of 10000mg/L, 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 city domestic sewage, though heavy metal content is lower, but contained pathogenic agent and persistence organic pollutant in the mud, and the various medicaments that add in the sewage treatment process all can bring potential harm to environment.
Practice with reference to external sludge incineration, some places attempt to reach by burning the purpose of mud decrement, still, and sludge incineration facility investment volume height, energy-output ratio is big, working cost costliness, the expense of sludge incineration add that more than 400 yuan/ton mud is when burning, can to atmospheric environment bring pollute and burn after residue reason such as still need dispose, according to the national conditions of China, sludge incineration is handled and is difficult to economically bear, and goes back imperfection technically.
Along with increasing rapidly of China's rapid economy development and urban population, the quantity of municipal effluent is constantly increasing, meanwhile people are more and more higher to the requirement of environmental quality, improving constantly of trade effluent and city domestic sewage processing rate, the quantity that means sludge of sewage treatment plant will grow with each passing day, therefore, and in the face of above reality, open up one and tally with the national condition, the new way of not only safe but also economic sewage sludge harmlessness, minimizing, recycling treatment is imperative.
By being carried out continuous 3 years monitoring, the sludge from wastewater treatment plant physico-chemical property shows, the main chemical compositions content in the mud little (table 1), and this has illustrated the mud that the municipal sewage plant produces, its main chemical constitution is a kept stable.The loss on ignition of mud is higher, on average reaches about 36%, and the content of full nitrogen and full phosphorus is also higher, and this shows and contains higher organic substance in the mud.Organic content height in the mud, its calorific value is also high, shows by mensuration, and the calorific value of sludge from wastewater treatment plant approaches the calorific value of brown coal, reaches the 1/3-1/2 (table 2) of standard coal calorific value; Content organic in lake, the river dredging mud is also higher, and according to the mutual relationship between organism and the calorific value, its calorific value is also than higher.If the heat energy in the mud can be developed, not only can make municipal sludge treatment plant mud and lake, river dredging mud obtain thoroughly handling safely, and the heat energy that mud is had become valuable resource.Yet, the utility value of sludge calorific value is decided by the water ratio (water content accounts for the mass percent of total mass) of mud, experimental study shows, will be with the complete after-flame of the mud of water ratio 75%-80%, make mud arrive the needed energy of burning-point, much larger than the energy that the over dry sludge incineration is produced, have only when water ratio and reduce to below 30%, the recycling that sludge calorific value could really embody it is worth.Therefore, make mud obtain innoxious, minimizing and recycling treatment, the dehydration of mud and decrement are the bases, and this also is the core place of sludge treatment technology.
The chemical constitution of table 1 sludge from wastewater treatment plant
Table 2 sludge from wastewater treatment plant, dredging mud and burning of coal calorific value
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of powerful dehydration and low temperature mummification bonded method for sludge treatment are provided.
A kind of powerful dehydration and low temperature mummification bonded method for sludge treatment comprise the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) waste heat supply temperature that heat power plant or cement mill are discharged is 130 ℃～220 ℃ a flue gas, controls exhaust gas volumn with air door, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging enters heat power plant or cement mill dedusting gas-freeing system, qualified discharge through behind the multicyclone, mud is when obtaining mummification, naturally forming particle diameter is the particle of 1～8mm, and mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 95%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
Described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.The barrel diameter of described rotary type sludge mummification granulating apparatus is 2.0～2.4m, and length is 22～28m, is equipped with in the cylindrical shell of rotary type sludge mummification granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.
Another kind of powerful dehydration and low temperature mummification bonded method for sludge treatment comprise the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) will be from independent thermal source, through thermosistor, temperature is 350 ℃～400 ℃ a hot flue gas, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging is through the dedusting degasifying device, qualified discharge, mud are when obtaining mummification, and forming particle diameter naturally is the particle of 1～8mm, mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 90%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
Described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.The barrel diameter of described rotary type sludge mummification granulating apparatus is 2.0～2.4m, and length is 22～28m, is equipped with in the cylindrical shell of sludge drying granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.Described independent thermal source is a fluidised form height of bed temperature flue gas fluidizing furnace, perhaps is hotblast stove coal-fired, that fire Sweet natural gas, fuel oil.
The present invention compared with prior art has beneficial effect:
1) by the powerful dehydration process, can make mud reduce to minimum level in the mass percent that the water content in mechanical dehydration stage accounts for total mass, this has significantly reduced the volume of mud, thereby reduced the expense of mud transportation, simultaneously also reduced the needed energy consumption of sludge drying, the processing cost of mud is reduced;
2) utilize heat power plant or cement mill smoke residual heat to dry sludge, not only can be under the situation that does not consume new forms of energy, the mass percent that the water content of sludge of sewage treatment plant and lake, river dredging mud is accounted for total mass reduces, and heat power plant or cement mill discharged flue gas waste heat are fully used, thereby opened up the new way of a treatment of wastes with processes of wastes against one another, the cyclic utilization of waste for innoxious, minimizing, the recycling treatment of municipal sludge, significant social and environmental benefit can either be produced, tangible economic benefit can be obtained again;
3) utilize heat power plant or cement mill smoke residual heat to dry sludge, thermal source is taken from heat power plant or cement mill discharged flue gas, therefore, can not influence the normal operation in heat power plant or cement mill, because mud obtains mummification under cold condition, thereby kept mud primary calorific value, mud can be contributed calorific value as the raw material and the auxiliary fuel of manufacture of cement after the mummification, sludge from wastewater treatment plant and lake, river dredging mud is handled completely, the heat resource of mud is farthest utilized.
Description of drawings
Fig. 1 utilizes heat power plant or the cement mill residual heat of exhaust flue gas process flow sheet as the dewatered sludge thermal source;
Fig. 2 is the process flow sheet from independent thermal source.
Embodiment
The present invention is according to the difference of sludge drying thermal source, and sludge treatment has two kinds of concrete methods.
A kind of powerful dehydration and low temperature mummification bonded method for sludge treatment comprise the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) waste heat supply temperature that heat power plant or cement mill are discharged is 130 ℃～220 ℃ a flue gas, controls exhaust gas volumn with air door, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging enters heat power plant or cement mill dedusting gas-freeing system, qualified discharge through behind the multicyclone, mud is when obtaining mummification, naturally forming particle diameter is the particle of 1～8mm, and mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 95%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
Described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.The barrel diameter of described rotary type sludge mummification granulating apparatus is 2.0～2.4m, and length is 22～28m, is equipped with in the cylindrical shell of rotary type sludge mummification granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.
Another kind of powerful dehydration and low temperature mummification bonded method for sludge treatment comprise the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) will be from independent thermal source, through thermosistor, temperature is 350 ℃～400 ℃ a hot flue gas, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging is through the dedusting degasifying device, qualified discharge, mud are when obtaining mummification, and forming particle diameter naturally is the particle of 1～8mm, mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 90%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
Described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.The barrel diameter of described rotary type sludge mummification granulating apparatus is 2.0～2.4m, and length is 22～28m, is equipped with in the cylindrical shell of sludge drying granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.Described independent thermal source is a fluidised form height of bed temperature flue gas fluidizing furnace, perhaps is hotblast stove coal-fired, that fire Sweet natural gas, fuel oil.
Embodiment 1
The mass percent that the municipal sewage plant accounts for total mass through the mechanical dehydration water content is 80% mud, pass through material distributing machine, send into powerful belt filter press, mud is after powerful press filtration, water content accounts for the mass percent of total mass and reduces to 55%, by the component type charger, make mud pulverize frustillatum on the one hand, on the other hand mud is sent in the rotary type sludge mummification granulating apparatus by certain time interval, carry out sludge drying and granulating process, the barrel diameter of rotary type sludge mummification granulating apparatus is 2.2m, long is 24m, the fume afterheat temperature that induced draft fan is discharged heat power plant is 160 ℃ a hot flue gas, by air door control air quantity, sending into mass percent that rotary type sludge mummification granulating apparatus and water content account for total mass and be 55% mud directly contacts, hot flue gas heating mud, make the part water evaporates in the mud, the moisture content of evaporation is discharged with the form of tail gas with flue gas, after the dedusting of tail gas process multi-cyclone, pass through induced draft fan, introduce the original dedusting air-removal equipment of heat power plant, qualified discharge.After mummification and granulating process, sludge moisture content accounts for the mass percent of total mass and reduces to 25%, mud is when obtaining mummification, and forming particle diameter naturally is the mud granule of 1～8mm, and mud granule enters stockyard, in mud granule refrigerative process, further dehydration, the mass percent that complete refrigerative mud granule water content accounts for total mass reduces to 18%, and this mud granule has been preserved the calorific value of 95% primary sludge, after fire coal mixes, as the auxiliary fuel of heat power plant.
Embodiment 2
The mass percent that the municipal sewage plant accounts for total mass through the mechanical dehydration water content is 85% mud, pass through material distributing machine, send into powerful plate-and-frame filter press, mud is after powerful press filtration, water content accounts for the mass percent of total mass and reduces to 60%, by the component type charger, make mud pulverize frustillatum on the one hand, on the other hand mud is sent in the rotary type sludge mummification granulating apparatus by certain time interval, carry out sludge drying and granulating process, the barrel diameter of rotary type sludge mummification granulating apparatus is 2.4m, long is 26m, the fume afterheat temperature that induced draft fan is discharged cement rotary kiln kiln tail boiler of power generation by waste heat is 200 ℃ a hot flue gas, by air door control air quantity, sending into mass percent that rotary type sludge mummification granulating apparatus and water content account for total mass and be 60% mud directly contacts, hot flue gas heating mud, make the part water evaporates in the mud, the moisture content of evaporation is discharged with the form of tail gas with flue gas, after the dedusting of tail gas process multi-cyclone, pass through induced draft fan, enter the original dedusting air-removal equipment in cement mill, qualified discharge.After mummification and granulating process, sludge moisture content accounts for the mass percent of total mass and reduces to 30%, mud is when obtaining mummification, naturally forming particle diameter is the mud granule of 1～8mm, and mud granule enters stockyard, in mud granule refrigerative process, further dehydration, fully the refrigerative mud granule water content mass percent that accounts for total mass reduces to 20%, with clayey raw material with 30～50% mixed, form mud-clay matter mixing raw material.This mixing raw material and calcareous raw material form raw material with 11%～17% mixed.Raw material by mill, calcine, after the cooling, cement grinding mill, cement.
Embodiment 3
The mass percent that the municipal sewage plant accounts for total mass through the mechanical dehydration water content is 83% mud, pass through material distributing machine, send into powerful plate-and-frame filter press, mud is after powerful press filtration, water content accounts for the mass percent of total mass and reduces to 56%, by the component type charger, make mud pulverize frustillatum on the one hand, on the other hand mud is sent in the rotary type sludge mummification granulating apparatus by certain time interval, carry out sludge drying and granulating process, the barrel diameter of rotary type sludge mummification granulating apparatus is 2.0m, long is 22m, induced draft fan will be from fluidised form height of bed temperature flue gas fluidizing furnace, through after the temperature adjustment of thermosistor, flue-gas temperature is 350 ℃ a hot flue gas, by air door control air quantity, sending into mass percent that rotary type sludge mummification granulating apparatus and water content account for total mass and be 56% mud directly contacts, hot flue gas heating mud, make the part moisture evaporation in the mud, moisture evaporated is discharged with the form of tail gas with flue gas, by induced draft fan, through the multistage dedusting air-removal equipment of wet type, qualified discharge.After mummification and granulating process, sludge moisture content accounts for the mass percent of total mass and reduces to 22%, mud is when obtaining mummification, naturally forming particle diameter is the mud granule of 1～8mm, mud granule enters stockyard, in mud granule refrigerative process, further dehydration, the mass percent that complete refrigerative mud granule water content accounts for total mass reduces to 19%, this mud granule has been preserved the calorific value of 90% primary sludge, after screening, and the mud granule of 2～6mm, ratio with 15% is mixed with clay, fires light energy saving brick;＜2mm and＞mud granule of 6mm, with coal-fired fusion, as the auxiliary fuel of fluidised form height of bed temperature flue gas fluidizing furnace.
Embodiment 4
The mass percent that papermaking wastewater treatment plant accounts for total mass through the mechanical dehydration water content is 80% mud, pass through material distributing machine, send into powerful belt filter press, mud is after powerful press filtration, water ratio reduces to 50%, by the component type charger, make mud pulverize frustillatum on the one hand, on the other hand mud is sent in the rotary type sludge mummification granulating apparatus by certain time interval, carry out sludge drying and granulating process, the barrel diameter of rotary type sludge mummification granulating apparatus is 2.4m, and long is 24m, and the fume afterheat temperature that induced draft fan is discharged heat power plant is 200 ℃ a hot flue gas, by air door control air quantity, send into mass percent that rotary type sludge mummification granulating apparatus and water content account for total mass and be 50% mud and directly contact, hot flue gas heating mud makes the part water evaporates in the mud, the moisture content of evaporation is discharged with the form of tail gas with flue gas, after the dedusting of tail gas process multi-cyclone, enter electric precipitation dedusting once more, qualified discharge by induced draft fan.Through behind the drying process, sludge moisture content accounts for the mass percent of total mass and reduces to 25%, mud is when obtaining mummification, naturally forming particle diameter is the mud granule of 1～8mm, this mud granule has been preserved the calorific value of 95% primary sludge, directly enter defeated coal channel, after fire coal mixes, as the auxiliary fuel of heat power plant.
Claims (7)
1. powerful dehydration and low temperature mummification bonded method for sludge treatment is characterized in that comprising the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) waste heat supply temperature that heat power plant or cement mill are discharged is 130 ℃～220 ℃ a flue gas, controls exhaust gas volumn with air door, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging enters heat power plant or cement mill dedusting gas-freeing system, qualified discharge through behind the multicyclone, mud is when obtaining mummification, naturally forming particle diameter is the particle of 1～8mm, and mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 95%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
2. a kind of powerful dehydration according to claim 1 and low temperature mummification bonded method for sludge treatment is characterized in that described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.
3. a kind of powerful dehydration according to claim 1 and low temperature mummification bonded method for sludge treatment, the barrel diameter that it is characterized in that described rotary type sludge mummification granulating apparatus is 2.0～2.4m, length is 22～28m, is equipped with in the cylindrical shell of rotary type sludge mummification granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.
4. powerful dehydration and low temperature mummification bonded method for sludge treatment is characterized in that comprising the steps:
1) mass percent that water content is accounted for total mass is 80～90% sludge of sewage treatment plant, or lake, river dredging mud, in strong force dewatering machine, carry out degree of depth mechanical dehydration, the mass percent that makes sludge moisture content account for total mass reduces to 50～60%, and the sewage that press filtration is come out from mud enters Sewage treatment systems;
2) mass percent that will account for total mass through degree of depth mechanical dehydration water content is 50～60% mud, by the component type charger, sends into rotary type sludge mummification granulating apparatus;
3) will be from independent thermal source, through thermosistor, temperature is 350 ℃～400 ℃ a hot flue gas, sends in the rotary type sludge mummification granulating apparatus by induced draft fan, carries out sludge drying and granulating process;
4) mud directly contacts with hot flue gas in rotary type mummification granulating apparatus, hot flue gas heating mud, and make part moisture evaporation in the mud, the tail gas of discharging is through the dedusting degasifying device, qualified discharge, mud are when obtaining mummification, and forming particle diameter naturally is the particle of 1～8mm, mud granule enters stockyard, cooling;
5) the cooled mud granule water content mass percent that accounts for total mass reduces to 15%～25%, volume is reduced to below 1/3rd, this mud granule has been preserved the original calorific value more than 90%, as the auxiliary fuel of fire coal and the raw material of manufacture of cement, perhaps fires light energy saving brick and haydite.
5. a kind of powerful dehydration according to claim 4 and low temperature mummification bonded method for sludge treatment is characterized in that described strong force dewatering machine is powerful belt filter press or powerful plate-and-frame filter press.
6. a kind of powerful dehydration according to claim 4 and low temperature mummification bonded method for sludge treatment, the barrel diameter that it is characterized in that described rotary type sludge mummification granulating apparatus is 2.0～2.4m, length is 22～28m, is equipped with in the cylindrical shell of sludge drying granulating apparatus mud is further disperseed and to help the granulated material delivering plate of mud and chain hammer.
7. a kind of powerful dehydration according to claim 4 and low temperature mummification bonded method for sludge treatment is characterized in that described independent thermal source is a fluidised form height of bed temperature flue gas fluidizing furnace, perhaps are hotblast stove coal-fired, that fire Sweet natural gas, fuel oil.
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| CN102161557A (en) * | 2011-03-10 | 2011-08-24 | 北京科技大学 | Method for treating excess sludge |
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| CN105130154A (en) * | 2015-08-06 | 2015-12-09 | 浙江大学 | Sludge drying and granulation integrated system having dust removing function, and method thereof |
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| CN107010808A (en) * | 2017-05-05 | 2017-08-04 | 张家港瑞赛克生态科技有限公司 | A kind of method for handling domestic sludge |
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| CN101914405A (en) * | 2010-08-26 | 2010-12-15 | 佛山市三水区大塘污水处理有限公司 | Sludge briquette fuel as well as production method and production system thereof |
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| CN102161557A (en) * | 2011-03-10 | 2011-08-24 | 北京科技大学 | Method for treating excess sludge |
| CN102161557B (en) * | 2011-03-10 | 2013-01-30 | 北京科技大学 | Method for treating excess sludge |
| CN103030376A (en) * | 2012-12-11 | 2013-04-10 | 甘永雄 | Treatment apparatus and process for in-kiln balling and firing ceramsite from industrial waste residue and sludge |
| CN105130154A (en) * | 2015-08-06 | 2015-12-09 | 浙江大学 | Sludge drying and granulation integrated system having dust removing function, and method thereof |
| CN105152512A (en) * | 2015-08-31 | 2015-12-16 | 杭州新源环境工程有限公司 | Sludge drying and granulating integrated system with double-layered structure and method of sludge drying and granulating integrated system |
| CN107010808A (en) * | 2017-05-05 | 2017-08-04 | 张家港瑞赛克生态科技有限公司 | A kind of method for handling domestic sludge |
| CN107010808B (en) * | 2017-05-05 | 2020-08-04 | 李苏卿 | Method for treating domestic sludge |
| CN114080919A (en) * | 2020-07-31 | 2022-02-25 | 赵明智 | Method for manufacturing self-supply slow-release nutrient flowerpot by using sludge |
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