CN104496137A - Energy-saving and environment-friendly method for treating municipal sludge - Google Patents
Energy-saving and environment-friendly method for treating municipal sludge Download PDFInfo
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- CN104496137A CN104496137A CN201410813331.7A CN201410813331A CN104496137A CN 104496137 A CN104496137 A CN 104496137A CN 201410813331 A CN201410813331 A CN 201410813331A CN 104496137 A CN104496137 A CN 104496137A
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Abstract
The invention provides an energy-saving and environment-friendly method for treating municipal sludge. The method comprises the following steps: doping municipal sludge with a water content of 70-85% with a regulation material with a certain weight proportion to form a fermented sludge material, and then placing the fermented sludge material on three-dimensional fermentation equipment for dynamic aerobic fermentation, wherein the three-dimensional fermentation equipment is composed of 2-40 layers in the vertical direction and 2-40 groups of belt conveying mechanisms in the horizontal direction, and a rotten dry material which is dried to a water content lower than 50% by biological dehydration is used in further environmental protection treatment or resource utilization. The method provided by the invention is simple, small in occupation area and good in fermentation effect, meanwhile, secondary pollution caused by bad smell can be avoided, and the purposes of high efficiency and environmental friendliness are achieved.
Description
Technical field
The invention belongs to municipal sludge energy-conserving and environment-protective process and application technology as the second resource field, be specifically related to a kind of method of energy-conserving and environment-protective process municipal sludge.
Background technology
By the data that relevant government department announces, the moisture content that the municipal sewage plant having built up operation to China in 2012 produces every year is that the sludge quantity of about 80% is at about 3,000 ten thousand tons.Along with the further quickening of Urbanization in China and the raising of ambient quality standard, treatment rate of domestic sewage and degree for the treatment of improve year by year, and the generation of mud also can sharply increase.As the inevitable outcome of sewage treatment process, the composition of mud is very complicated, the aggregate that the zoogloea formed by multiple-microorganism forms with the organism of its absorption and inorganics, except containing except a large amount of moisture, organism also containing difficult degradation, volatile matter, heavy metal and salt, and pathogenic agent and parasitic ovum etc., must process and dispose in time, the normal operation of guarantee sewage work and treatment effect, avoid causing secondary pollution.
In developed country, specific resistance to filtration is extremely important link in sewage disposal, and its investment accounts for 50% ~ 70% of sewage work's gross investment.In existing sewage work of China, supporting have a sludge stabilization treatment facility be less than 25%, what treatment process and facility were comparatively perfect is less than 10%, that wherein can normally run is few especially, particularly in the higher big city of the level of urbanization and area, mud outlet has become the unavoidable great and problem that must solve of environmental protection.Therefore, the mud of how that generation is huge, complicated, after scientific disposal, makes its minimizing, innoxious, resource utilization, has become the problem of whole world environment circle deeply for paying close attention to.
In world wide, the process of mud is disposed, past is based on sanitary landfill, but day by day rare along with land resources, the recycling of mud has become the main trend of development, and recycling is especially based on the compost Land_use change of mud, if the sludge composting land utilization ratio of the U.S. is more than 60%, European Union, Japan etc. are then between 40% ~ 50%, and these ratios are also rising fast.Therefore, comply with world trends, also namely manure resourcesization utilizes should be more the process direction of such country of populous, that land resources is relatively deficient China for the compost Land_use change of mud.
No matter be the processing modes such as manure resourcesization utilization, or landfill, building materials, burning, its prerequisite all needs to carry out mummification and disposal of stability to mud.With regard to the mummification of mud and stable, present in society what generally adopt is oven dry, airing, pile fermentation three kinds of methods.Because sludge moisture content is high and be that cellular water, particle are little, viscosity high, above-mentioned three kinds of ways are at present made all not have to solve well the mummification problem of mud, first the energy consumption cost being oven dry is too high, and society is difficult to bear, and tail gas secondary pollution is serious; Secondly airing is lived at the mercy of the elements, and processing efficiency is low, and treatment capacity is little, cannot continuous synchronization stabilizing treatment, and needs to build large-area threshing ground; 3rd stack retting is mainly based on the slot type of plane open type and article buttress formula stack retting, and efficiency is not high, the cycle is long, and the secondary environmental pollution of stack retting foul smell is relatively more serious, and needs a large amount of stack retting place.Therefore, rarely have now and see successful Engineering Projects, a wherein very important reason is exactly most sewage work is all that layout construction is in city proper, environmental requirement is strict, do not allow the fossil fuels such as burning coal, soil is very limited and valuable, in addition do not consider at the beginning of planning, big area place at all not used for sludge treatment in sewage work, and it is impossible to all amplification edges again, cause mud cannot minimizing process on the spot, also finally cause aforesaid method cannot solve sludge handling problem at all.
Therefore, current environmental protection treatment and the recycling problem that really will solve mud, one must be had can to adapt to current sewage work Present Layout Situation, the existing very limited soil of sewage work or space can be used to carry out innoxious, minimizing on the spot efficiently process, and very energy-conserving and environment-protective, there is no secondary pollution completely, reach the method for urban population compact district environmental requirement.But present society not yet finds that there is the method that can meet and require like this.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of method of energy-conserving and environment-protective process municipal sludge, the method is both energy-conservation, again environmental protection, and efficiently.
The object of the invention is to be achieved through the following technical solutions:
A kind of method of energy-conserving and environment-protective process municipal sludge, the adjustment material blending of the municipal sludge of moisture content 70% ~ 85% and certainweight ratio is formed sludge fermentation material, then be placed in vertical direction by 2 ~ 40 layers, the enterprising Mobile state aerobic fermentation of three-dimensional fermentation equipment that forms of horizontal direction 2 ~ 40 groups of endless belt conveyor, biologically dehydrating mummification is make further environmental protection treatment or recycling after the mummification material that becomes thoroughly decomposed of moisture content less than 50%.
Preferred as technical scheme, municipal sludge is 3 ~ 10: 1 with regulating the mixture weight ratio of material.
As preferred further, the moisture content of described sludge fermentation material is 50% ~ 70%, and carbon-nitrogen ratio is 20 ~ 35: 1, and pH value is 3 ~ 6; Aerobic fermentation adopts microorganism naturally to inoculate.
As preferred further, described adjustment material is the combination of the one or more than one in sugar mill mud, bagasse, sucrose, rice bran, system chaff, wheat bran, Semen Maydis powder, dregs of beans, stalk, cassava starch dregs, manioc vinasse slag, beer residue, pomace, Chinese herb residues, Pericarppium arachidis hypogaeae, wooden chaff, tree bark powder, coconut palm chaff, pipe tobacco, soddy soil, changing food waste, Boiler Ash, paper mill sludge, alcohol mud, fowl and animal excrement, silkworm faeces or bran cake powder.
As preferred further, described three-dimensional fermentation equipment is provided with airtight proving room, and described endless belt conveyor is installed in this sealed fermenting room; Offer inlet mouth bottom this proving room, top arranges and is provided with dedusting deodoration system fermentation tail gas being carried out to dedusting deodorizing purifying treatment; The air box impulse sack cleaner dedusting of this dedusting deodoration system, with UV photodissociation oxidation deodorizer or the deodorizing of ozone oxidation deodorizer.
As preferred further, the conveying belt width of described endless belt conveyor is 1 ~ 6m, is string rubber with holes, plastics guipure or metal mesh belt.
As preferred further, the fermentation material layer thickness that described sludge fermentation material is laid in three-dimensional fermentation equipment is 150 ~ 600mm.
As preferred further, the described further environmental protection treatment of mummification material of becoming thoroughly decomposed is sanitary landfill, and recycling is that burning, building materials, organic fertilizer or engineering are banketed.
As further preferably, described sludge fermentation material completes fermentation formation and becomes thoroughly decomposed after mummification material, instrumentality material screen is wherein branched away the blending fermentative processing being back to fresh sludge, or direct reuse part is become thoroughly decomposed mummification material blending fresh sludge fermentative processing.
As preferred further, the method for described energy-conserving and environment-protective process municipal sludge, it comprises the following steps:
(1) by municipal sludge and the blending by weight proportion of adjustment material, stirring;
(2) blending, stir after sludge fermentation material rise to by material lift equipment the endless belt conveyor that three-dimensional fermentation equipment is positioned at most top layer, evenly be deployed to conveying belt from feed end, regulate the running speed of endless belt conveyor, make sludge fermentation material just be covered with conveying zone face, bed thickness controls in the scope of belt edge height;
(3) when sludge fermentation material is covered with the whole piece conveying belt of most top layer, discharge end temperature of charge reaches and turns more than temperature 50 C, it is consistent with it that material is then transported to travelling speed below it by the endless belt conveyor of top layer, on the conveying zone face of direction endless belt conveyor in contrast, fresh sludge fermentation material is promoted to the feed end of top layer endless belt conveyor simultaneously, synchronously be deployed on conveying belt, when the sludge fermentation material originally fermented all is transported on lower one deck endless belt conveyor, fresh sludge fermentation material is also just covered with the endless belt conveyor of top layer, circulate successively, fresh sludge fermentation material is constantly added by from the endless belt conveyor being positioned at top layer, progressively fermentation maturity mummification in the process of successively conveying downwards,
(4) after the temperature in sludge fermentation material declines and is progressively tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, by becoming thoroughly decomposed, mummification material transports out from the endless belt conveyor of three-dimensional fermentation equipment, makes further environmental protection treatment or recycling.
As preferred further, before described sludge fermentation material is deployed to top layer endless belt conveyor, the material forming device be installed in above its feed end is squeezed into sheet or strip, when being transported to lower one deck endless belt conveyor from last layer endless belt conveyor, being installed in the shredder assembly fragmentation between two-layer transfer roller, puddling, cooling.
beneficial effect of the present invention:
One is adopt three-dimensional fermentation equipment to carry out fermentation drying and other treatment to mud, when fermentation equipment facility investment is substantially suitable, can the fermentation place of the slot type of Billy's plane or bar buttress formula fermentation saving more than 90%, as dispose of sewage a day 300,000 tons, daily output 300 tons, mud medium-and-large-sized sewage work, fermentative processing place only needs 2000m
2left and right is just enough.
Two is owing to adopting stereo multilayer fermentation, the bed of material of sludge fermentation material is set to the ideal thickness of about 300mm, and fermentation supporting body is designed to the netted of highly air-permeable, the whole bed of material is made all to have good ventilation property, all be in good aerobic fermentation state, the carrying out of effective suppression anaerobically fermenting, fermenting process produces without foul smell, the secondary environmental pollution problem of effective solution fermentation odor, and the mummification of becoming thoroughly decomposed of sludge fermentation material only needs 10 ~ 12 days to moisture content less than 50%, period ratio slot type or bar buttress formula fermentation shortening more than 70%, do not need the oven dry of any modes such as coal electricity, dewatered sludge energy consumption per ton is only about 30 yuan, more energy-conservation than drying mode more than 90%.
Three is that fermentation drying and other treatment process can realize automatization streamline operration, has possessed batch production, mass-producing, the instant disposal and utilization condition of serialization.
Four is that sludge fermentation is become thoroughly decomposed fully, Nutrient Transformation and pathogenic agent, parasitic ovum thorough killing, provides prerequisite for manure resourcesization utilizes.
Therefore; the present invention is one can adapt to current sewage work Present Layout Situation completely; use that batch production is on the spot carried out in the existing very limited soil of sewage work or space, mass-producing, serialization, innoxious, minimizing efficiently process; and very energy-conserving and environment-protective; non-secondary pollution; reach the treatment process of urban population compact district environmental requirement, fundamentally can solve environmental protection treatment and the recycling problem of mud.
Embodiment
By specific embodiment, explanation is further elaborated to technical scheme of the present invention below.
embodiment one:
The method of energy-conserving and environment-protective process municipal sludge of the present invention is: with part by weight be 80%, moisture content be 80% municipal sludge and part by weight be 20%, moisture content be 10% manioc vinasse slag be blended into the sludge fermentation material of moisture content 66%, then be placed in a set of by horizontal direction by 5 groups, 12 layers, the enterprising Mobile state aerobic fermentation of dynamic solid formula fermentation equipment that forms of the conveying belt width endless belt conveyor that is 4m 12 days in vertical direction, be directly used as organic fertilizer after being converted into the mummification material that becomes thoroughly decomposed of moisture content 42% and use; Microorganism is adopted naturally to inoculate in fermenting process; The bed thickness that sludge fermentation material is laid in belt of belt conveyor is 350mm.Its treatment step is as follows:
(1) municipal sludge and manioc vinasse slag are rendered in continuously stirring device by automatic batching system in the ratio of 8:2, obtained the sludge fermentation material of blending and stirring at the output terminal of whipping appts;
(2) sludge fermentation material is promoted respectively the most top layer of the endless belt conveyor being transported to three-dimensional installation by high angle belt conveyer transfer roller, evenly be deployed to conveying belt from the feed end of the endless belt conveyor of most top layer, before falling conveying belt, the pulley type roll-in twin rollers roll-in of the side of being attached thereon is into about the thick sheet of 5mm, the gap in sludge fermentation material is increased with this, increase the ventilation property in the bed of material, be conducive to microorganism naturally inoculate and be rapidly heated, regulate the running speed of endless belt conveyor, sludge fermentation material is made just to be covered with conveying zone face, bed thickness controls at 350mm, and make sludge fermentation material evenly be covered with the whole piece conveying belt of most top layer with this speed, then endless belt conveyor is stopped, sludge fermentation material is allowed to carry out natural microorganisms inoculation at air,
(3) after about 24 hours, the temperature be in the sludge fermentation material of the endless belt conveyor output terminal of most top layer reaches 60 ~ 65 DEG C, start most top layer and below it, endless belt conveyor of one deck their transfer rate are consistent simultaneously, the traffic direction of the endless belt conveyor of lower floor and the contrary of most top layer, sludge fermentation material on top layer endless belt conveyor falls on the conveying zone face of lower one deck endless belt conveyor equably, simultaneously fresh sludge fermentation material is delivered to the feed end of top layer endless belt conveyor by promoting, synchronously be deployed on conveying belt, when the sludge fermentation material originally fermented all is transported on lower one deck endless belt conveyor, fresh sludge fermentation material is also just covered with the endless belt conveyor of top layer, thus and thus, sludge fermentation material on endless belt conveyor from top to bottom, every day falls into lower one deck endless belt conveyor from the endless belt conveyor being positioned at last layer, and fresh sludge fermentation material is constantly added from the endless belt conveyor being positioned at top layer, sludge fermentation material successively declines in the process of conveying from top to bottom, constantly carry out puddling and in depth ferment and be tending towards mummification of becoming thoroughly decomposed,
(4) when filter mud fermentation material drops to Floor 12, temperature in material has dropped to and has been tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, by becoming thoroughly decomposed, the handling equipment of mummification material through being mounted on Floor 12 endless belt conveyor rear end transports out, and is directly used as organic fertilizer and is applied to forest land or agricultural planting land used.
embodiment two:
The method of energy-conserving and environment-protective process municipal sludge of the present invention is: be 75% with part by weight, moisture content is the municipal sludge of 80%, part by weight is 10%, moisture content be 10% bagasse and part by weight be 15%, moisture content be 10% cassava starch dregs be blended into the sludge fermentation material of moisture content 62.5%, then be placed in a set of by horizontal direction by 10 groups, in vertical direction 12 layers, the enterprising Mobile state aerobic fermentation of dynamic solid formula fermentation equipment that the endless belt conveyor that conveying belt width is 4m is formed 12 days, the organic raw material of process for processing Commodity Organic Fertilizer is used as after being converted into the mummification material that becomes thoroughly decomposed of moisture content 35%, microorganism is adopted naturally to inoculate in fermenting process, the bed thickness that filter mud fermentation material is laid in belt of belt conveyor is 300mm.Its fermentative processing step is as follows:
(1) municipal sludge, bagasse and cassava starch dregs are rendered in continuously stirring device by automatic batching system in the ratio of 7.5:1:1.5, obtained the sludge fermentation material of blending and stirring at the output terminal of whipping appts;
(2) sludge fermentation material is promoted respectively the most top layer of the endless belt conveyor being transported to three-dimensional installation by high angle belt conveyer transfer roller, evenly be deployed to conveying belt from the feed end of the endless belt conveyor of most top layer, before falling conveying belt, the pulley type roll-in twin rollers roll-in of the side of being attached thereon is into about the thick sheet of 5mm, the gap in sludge fermentation material is increased with this, increase the ventilation property in the bed of material, be conducive to microorganism naturally inoculate and be rapidly heated, regulate the running speed of endless belt conveyor, sludge fermentation material is made just to be covered with conveying zone face, bed thickness controls at 300mm, and make sludge fermentation material evenly be covered with the whole piece conveying belt of most top layer with this speed, then endless belt conveyor is stopped, sludge fermentation material is allowed to carry out natural microorganisms inoculation at air,
(3) be 144m by the Design of length of the endless belt conveyor of every layer, transfer rate is set as 0.1m/min, sludge fermentation material falls into from the input terminus of the endless belt conveyor being in most top layer the fermentation time that conveying belt just experiences about 24 hours to the output terminal being transported to endless belt conveyor, temperature now in sludge fermentation material can reach 60 ~ 65 DEG C, start the endless belt conveyor of the from top to bottom second layer and the vane-type roll-in twin rollers above it, regulate the transfer rate of endless belt conveyor and being consistent of top layer of the second layer, throughput direction in contrast, sludge fermentation material on top layer endless belt conveyor falls into vane-type roll-in twin rollers equably, fall on the conveying zone face of second layer endless belt conveyor after being broken, simultaneously fresh sludge fermentation material is then also deployed to conveying belt equably by the feed end input continuously from the endless belt conveyor of top layer, carry out nature inoculation fermentation while be fed forward, sludge fermentation material reaches in the conveying belt top fermentation of any layer endless belt conveyor and within 24 hours, is just transported on throughput direction lower one deck endless belt conveyor in contrast, thus and thus, when fresh sludge fermentation material is from the endless belt conveyor being transfused to top layer, successively decline from top to bottom, carry while ferment, constantly carry out puddling and in depth ferment and be tending towards mummification of becoming thoroughly decomposed,
(4) when sludge fermentation material experiences the conveying of 12 days, be transported to the output terminal of Floor 12 endless belt conveyor, temperature now in material has dropped to and has been tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, start the clinker conveyor machine the being connected to Floor 12 endless belt conveyor output terminal mummification material that will become thoroughly decomposed to be transported to packing shop and directly to pack, or be transported in the feed proportioning system of next production line, for processing Commodity Organic Fertilizer product.
embodiment three:
The method of energy-conserving and environment-protective process municipal sludge of the present invention is: be 80% with part by weight, moisture content is the municipal sludge of 80%, part by weight is 10%, moisture content be 10% bagasse and part by weight be 10%, moisture content be 10% system chaff be blended into the sludge fermentation material of moisture content 66%, then be placed in a set of by horizontal direction by 5 groups, in vertical direction 12 layers, the enterprising Mobile state aerobic fermentation of dynamic solid formula fermentation equipment that the endless belt conveyor that conveying belt width is 3m is formed 12 days, be used as biomass fuel after being converted into the mummification material that becomes thoroughly decomposed of moisture content 40% to burn, microorganism is adopted naturally to inoculate in fermenting process, the bed thickness that sludge fermentation material is laid in belt of belt conveyor is 300mm.Its production stage is as follows:
(1) municipal sludge, bagasse and system chaff are rendered in continuously stirring device by automatic batching system in the ratio of 8:1:1, obtained the sludge fermentation material of blending and stirring at the output terminal of whipping appts;
(2) sludge fermentation material is promoted respectively the most top layer of the endless belt conveyor being transported to three-dimensional installation by high angle belt conveyer transfer roller, evenly be deployed to conveying belt from the feed end of the endless belt conveyor of most top layer, before falling conveying belt, the pulley type roll-in twin rollers roll-in of the side of being attached thereon is into about the thick sheet of 5mm, the gap in sludge fermentation material is increased with this, increase the ventilation property in the bed of material, be conducive to microorganism naturally inoculate and be rapidly heated, regulate the running speed of endless belt conveyor, sludge fermentation material is made just to be covered with conveying zone face, bed thickness controls at 300mm, and make sludge fermentation material evenly be covered with the whole piece conveying belt of most top layer with this speed, then endless belt conveyor is stopped, sludge fermentation material is allowed to carry out natural microorganisms inoculation at air,
(3) after about 24 hours, the temperature be in the sludge fermentation material of the endless belt conveyor output terminal of most top layer reaches 60 ~ 65 DEG C, start most top layer and below it, endless belt conveyor of one deck their transfer rate are consistent simultaneously, the traffic direction of the endless belt conveyor of lower floor and the contrary of most top layer, sludge fermentation material on top layer endless belt conveyor falls on the conveying zone face of lower one deck endless belt conveyor equably, simultaneously fresh sludge fermentation material is delivered to the feed end of top layer endless belt conveyor by promoting, synchronously be deployed on conveying belt, when the sludge fermentation material originally fermented all is transported on lower one deck endless belt conveyor, fresh sludge fermentation material is also just covered with the endless belt conveyor of top layer, thus and thus, sludge fermentation material on endless belt conveyor from top to bottom, every day falls into lower one deck endless belt conveyor from the endless belt conveyor being positioned at last layer, and fresh sludge fermentation material is constantly added from the endless belt conveyor being positioned at top layer, sludge fermentation material successively declines in the process of conveying from top to bottom, constantly carry out puddling and in depth ferment and be tending towards mummification of becoming thoroughly decomposed,
(4) when sludge fermentation material drops to Floor 12, temperature in material has dropped to and has been tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, by becoming thoroughly decomposed, the handling equipment of mummification material through being mounted on Floor 12 endless belt conveyor rear end transports out, and burns as biomass fuel.
embodiment four:
The method of energy-conserving and environment-protective process municipal sludge of the present invention is: be 75% with part by weight, moisture content be 80% municipal sludge and part by weight be 15%, moisture content be 10% straw powder and part by weight be 10%, moisture content be 10% coconut palm chaff be blended into the sludge fermentation material of moisture content 62.5%, then be placed in a set of by horizontal direction by 5 groups, in vertical direction 10 layers, the enterprising Mobile state aerobic fermentation of dynamic solid formula fermentation equipment that the endless belt conveyor that conveying belt width is 3m is formed 10 days, be converted into the mummification material that becomes thoroughly decomposed of moisture content 37%, straw powder wherein and coconut palm chaff are sieved out and is back to fermentative processing blending next time, rest materials is used as biomass fuel and burns, microorganism is adopted naturally to inoculate in fermenting process, the bed thickness that sludge fermentation material is laid in belt of belt conveyor is 300mm.Its production stage is as follows:
(1) municipal sludge, straw powder and coconut palm chaff are rendered in continuously stirring device by automatic batching system in the ratio of 7.5:1.5:1, obtained the sludge fermentation material of blending and stirring at the output terminal of whipping appts;
(2) sludge fermentation material is promoted respectively the most top layer of the endless belt conveyor being transported to three-dimensional installation by high angle belt conveyer transfer roller, evenly be deployed to conveying belt from the feed end of the endless belt conveyor of most top layer, before falling conveying belt, the pulley type roll-in twin rollers roll-in of the side of being attached thereon is into about the thick sheet of 5mm, the gap in sludge fermentation material is increased with this, increase the ventilation property in the bed of material, be conducive to microorganism naturally inoculate and be rapidly heated, regulate the running speed of endless belt conveyor, sludge fermentation material is made just to be covered with conveying zone face, bed thickness controls at 300mm, and make sludge fermentation material evenly be covered with the whole piece conveying belt of most top layer with this speed, then endless belt conveyor is stopped, sludge fermentation material is allowed to carry out natural microorganisms inoculation at air,
(3) after about 24 hours, the temperature be in the sludge fermentation material of the endless belt conveyor output terminal of most top layer reaches 60 ~ 65 DEG C, start most top layer and below it, endless belt conveyor of one deck their transfer rate are consistent simultaneously, the traffic direction of the endless belt conveyor of lower floor and the contrary of most top layer, sludge fermentation material on top layer endless belt conveyor falls on the conveying zone face of lower one deck endless belt conveyor equably, simultaneously fresh sludge fermentation material is delivered to the feed end of top layer endless belt conveyor by promoting, synchronously be deployed on conveying belt, when the sludge fermentation material originally fermented all is transported on lower one deck endless belt conveyor, fresh sludge fermentation material is also just covered with the endless belt conveyor of top layer, thus and thus, sludge fermentation material on endless belt conveyor from top to bottom, every day falls into lower one deck endless belt conveyor from the endless belt conveyor being positioned at last layer, and fresh sludge fermentation material is constantly added from the endless belt conveyor being positioned at top layer, sludge fermentation material successively declines in the process of conveying from top to bottom, constantly carry out puddling and in depth ferment and be tending towards mummification of becoming thoroughly decomposed,
(4) when sludge fermentation material drops to Floor 12, temperature in material has dropped to and has been tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, the handling equipment of mummification material through being mounted on Floor 12 endless belt conveyor rear end that become thoroughly decomposed is conveyed into the screening plant installing its rear end to sieve, the straw powder of sifting out and coconut palm chaff handling equipment are transported to the storehouse that feeds intake of automatic batching system, be back to the blending fermentative processing next time of mud, remaining material is used as biomass fuel and burns.
In order to reduce the foul smell that distributes in fermentation materials in fermenting process and dust impacts environment, arranged by described endless belt conveyor and be installed in airtight proving room, the bottom of proving room arranges inlet mouth, and top arranges and is provided with dedusting deodoration system; The air box impulse sack cleaner dedusting of this dedusting deodoration system, with the deodorizing of UV photodissociation oxidation deodorizer, also can use the deodorizing of ozone oxidation deodorizer.In fermenting process, open dedusting deodoration system, ozone enters in proving room from the bottom of proving room, fermentation tail gas with frowziness and dust is sucked wherein by dedusting deodoration system at the top of proving room, be discharged in air after dedusting deodorizing purification, effectively avoid the foul smell of fermenting process and dust to produce secondary pollution to outside atmosphere.
Claims (10)
1. the method for an energy-conserving and environment-protective process municipal sludge, it is characterized in that: the adjustment material blending of the municipal sludge of moisture content 70% ~ 85% and certainweight ratio is formed sludge fermentation material, then be placed in vertical direction by 2 ~ 40 layers, the enterprising Mobile state aerobic fermentation of three-dimensional fermentation equipment that forms of horizontal direction 2 ~ 40 groups of endless belt conveyor, biologically dehydrating mummification is make further environmental protection treatment or recycling after the mummification material that becomes thoroughly decomposed of moisture content less than 50%.
2. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that: the moisture content of described sludge fermentation material is 50% ~ 70%, and carbon-nitrogen ratio is 20 ~ 35:1, and pH value is 3 ~ 6; Aerobic fermentation adopts microorganism naturally to inoculate.
3. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that: described adjustment material is the combination of the one or more than one in sugar mill mud, bagasse, sucrose, rice bran, system chaff, wheat bran, Semen Maydis powder, dregs of beans, stalk, cassava starch dregs, manioc vinasse slag, beer residue, pomace, Chinese herb residues, Pericarppium arachidis hypogaeae, wooden chaff, tree bark powder, coconut palm chaff, pipe tobacco, soddy soil, changing food waste, Boiler Ash, paper mill sludge, alcohol mud, fowl and animal excrement, silkworm faeces or bran cake powder.
4. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, it is characterized in that: described three-dimensional fermentation equipment is provided with airtight proving room, described endless belt conveyor is arranged in airtight proving room; Offer inlet mouth bottom described proving room, top arranges and is provided with dedusting deodoration system fermentation tail gas being carried out to dedusting deodorizing purifying treatment; The dedusting of described dedusting deodoration system air box impulse sack cleaner, with UV photodissociation oxidation deodorizer or the deodorizing of ozone oxidation deodorizer.
5. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that: the conveying belt width of described endless belt conveyor is 1 ~ 6m, is string rubber with holes, plastics guipure or metal mesh belt.
6. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that: the fermentation material layer thickness that described sludge fermentation material is laid on the conveying belt of endless belt conveyor is 150 ~ 600mm.
7. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that: the described further environmental protection treatment of mummification material of becoming thoroughly decomposed is sanitary landfill, and recycling is that burning, building materials, organic fertilizer or engineering are banketed.
8. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, it is characterized in that: described sludge fermentation material completes fermentation formation and becomes thoroughly decomposed after mummification material, instrumentality material screen is wherein branched away the blending fermentative processing being back to fresh sludge, or direct reuse part is become thoroughly decomposed mummification material blending fresh sludge fermentative processing.
9. the method for energy-conserving and environment-protective process municipal sludge according to claim 1, is characterized in that, comprise the following steps:
(1) by municipal sludge and the blending by weight proportion of adjustment material, stirring;
(2) blending, stir after sludge fermentation material rise to by material lift equipment the endless belt conveyor that three-dimensional fermentation equipment is positioned at most top layer, evenly be deployed to conveying belt from feed end, regulate the running speed of endless belt conveyor, make sludge fermentation material just be covered with conveying zone face, bed thickness controls in the scope of belt edge height;
(3) when sludge fermentation material is covered with the whole piece conveying belt of most top layer, discharge end temperature of charge reaches and turns more than temperature 50 C, it is consistent with it that material is then transported to travelling speed below it by the endless belt conveyor of top layer, on the conveying zone face of direction endless belt conveyor in contrast, fresh sludge fermentation material is promoted to the feed end of top layer endless belt conveyor simultaneously, synchronously be deployed on conveying belt, when the sludge fermentation material originally fermented all is transported on lower one deck endless belt conveyor, fresh sludge fermentation material is also just covered with the endless belt conveyor of top layer, circulate successively, fresh sludge fermentation material is constantly added by from the endless belt conveyor being positioned at top layer, progressively fermentation maturity mummification in the process of successively conveying downwards,
(4) after the temperature in sludge fermentation material declines and is progressively tending towards normal temperature, sludge fermentation material fermentation terminates, be converted into the mummification material that becomes thoroughly decomposed, by becoming thoroughly decomposed, mummification material transports out from the endless belt conveyor of three-dimensional fermentation equipment, makes further environmental protection treatment or recycling.
10. the method for energy-conserving and environment-protective process municipal sludge according to claim 9, it is characterized in that: before described sludge fermentation material is deployed to top layer endless belt conveyor, the material forming device be installed in above its feed end is squeezed into sheet or strip, when being transported to lower one deck endless belt conveyor from last layer endless belt conveyor, being installed in the shredder assembly fragmentation between two-layer transfer roller, puddling, cooling.
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