CN210915777U - Push type sludge continuous aerobic fermentation system - Google Patents
Push type sludge continuous aerobic fermentation system Download PDFInfo
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- CN210915777U CN210915777U CN201921641756.9U CN201921641756U CN210915777U CN 210915777 U CN210915777 U CN 210915777U CN 201921641756 U CN201921641756 U CN 201921641756U CN 210915777 U CN210915777 U CN 210915777U
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Abstract
The utility model discloses a continuous good oxygen fermentation system of lapse formula mud, including fermentation storehouse, feed arrangement, air feeder, material mixing and migration device, exhaust gas purification device and discharging device, with pending sewage treatment excess sludge and living beings, thoroughly decomposed mud misce bene when using, the unloading constantly passes forward to the fermentation storehouse in the time of fermentation, the continuous ejection of compact of gained thoroughly decomposed mud. The utility model discloses a system, but continuous feed, fermentation, ejection of compact, the operation is stable, has improved the circulation efficiency of equipment such as fermentation storehouse, is convenient for realize automatic and high-level maintenance management.
Description
Technical Field
The utility model belongs to the technical field of solid waste handles, concretely relates to push type mud is aerobic fermentation system in succession.
Background
The domestic sludge is a residue generated in the domestic sewage treatment process, and the water content of the filter-pressing sludge is about 80 percent, wherein the filter-pressing sludge is rich in microorganisms and organic matters and is unstable organic waste with high water content. With the progress of urbanization in China and the improvement of the domestic sewage retention rate, the amount of the residual sludge is increased sharply. The annual output of the surplus sludge in the domestic sewage treatment reaches 4000 ten thousand tons, and the annual treatment cost reaches hundreds of billions of yuan.
At present, sludge treatment modes in China mainly comprise modes of landfill, composting, natural drying, incineration and the like, and the four treatment methods are 65%, 15%, 6% and 3% in percentage. The method shows that the sludge treatment mode in China is mainly landfill, and a large amount of sludge is not treated in a standardized way, so that secondary pollution is directly caused, and serious threat is generated to the ecological environment. The sludge contains a large amount of organic matters and N, P, K nutrient elements required by plant growth, and the land utilization of the sludge is popular in the early sludge disposal. However, with the attention of people to environmental problems, heavy metals, toxic and harmful organic pollutants contained in sludge are receiving high attention as a safety risk for land use, so that the land use of sludge is gradually replaced by incineration. However, the incineration of sludge also releases heavy metals and particulate pollutants into the air, which also causes great harm to human beings.
With the gradual manifestation of the defects of the traditional sludge disposal mode and the improvement of the requirements on public environment and the gradual realization that the sludge is a valuable available resource, the sludge resource recycling treatment is more and more widely concerned. The sludge resource treatment reduces the content of pollutants in the sludge on one hand, and enables the sludge to become available resources on the other hand. The technical path, technical method and related equipment for sludge recycling are highly regarded.
Patent CN201910645363.3 discloses a production mechanism of fertilizer is produced in reed fodder and sludge composting treatment, including raw materials workshop, fermentation workshop, ageing workshop and system fertile workshop. Be equipped with in the raw materials workshop auxiliary material storehouse, mix the machine, be equipped with the fermentation vat in the fermentation workshop, the fermentation vat passes through belt distributing device and is connected with mixing the machine, is equipped with in the fermentation vat and turns over a heap device and aeration equipment.
Patent CN201910168375.1 discloses a self-heating type sludge ultra-high temperature aerobic composting method and device with staged strain temperature control, which is self-heating type ultra-high temperature aerobic composting with staged temperature control realized by inoculating a compound microbial inoculum, and comprises a starting stage, a medium temperature stage, a high temperature stage, an ultra-high temperature stage and a decomposition stage, wherein the composting device comprises a tank body, an automatic temperature and oxygen adjusting device, a bacterium adding device, a stirring device and a condensate water diversion trench.
Patent CN201811566916.8 discloses a continuous aerobic dynamic composting process using sludge and straw, which is to mix sludge and crushed straw in a mass ratio of 1:2-2:1 as raw materials and inoculate a composting starter, add water into the materials and stir the mixture to have a water content of 50-60%, continuously convey the mixture into a composting machine for aerobic fermentation, adjust the fermentation temperature in the composting machine to 45-55 ℃ by controlling the air speed entering the composting machine, ferment for 3-5 days, then discharge the material with a water content of 50-55%, stack the discharged material into a stack for aging, keep ventilation, control the temperature in the stack to 40-65 ℃ and the aging time to 15-20 days, and reduce the water content of the stacked material to be lower than 30%.
However, the existing sludge composting facilities and methods do not adopt effective measures in the aspect of heat preservation of a compost body, do not well adjust the structure and the state of the sludge, and do not utilize the biological evaporation technology to carry out dehydration and decrement on the sludge. The high water content of the sludge is always the most important obstacle for recycling the sludge, and the key for recycling the aerobic compost of the sludge is how to condition the structural state of the sludge, improve the transmission of oxygen in the sludge and the evaporation of water, and reduce the energy consumption and the cost of the sludge recycling treatment.
SUMMERY OF THE UTILITY MODEL
In order to overcome the outstanding problem that exists in the aspect of present domestic sewage treatment excess sludge treatment, the utility model discloses a continuous aerobic fermentation system of lapse formula excess sludge aims at providing new equipment and method for the low energy consumption of excess sludge, low-cost resource utilization.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a push type sludge continuous aerobic fermentation system is characterized in that: the fermentation device comprises a fermentation bin, wherein a feeding end is arranged on one side of the fermentation bin, and a discharging end is arranged on the other opposite side of the fermentation bin; the fermentation bin is integrally inclined towards the discharging end;
a feeding hole is formed in the feeding end of the fermentation bin, the feeding hole is connected with a fermentation bin batching platform, and a material mixing and feeding integrated machine is arranged at the feeding hole;
a hollow rotating shaft is arranged in the fermentation bin along the length direction of the fermentation bin and is driven by a driving motor; the hollow rotating shaft is provided with hollow blades along the axial direction, and the hollow structure of the hollow rotating shaft is communicated with the hollow structure of the hollow blades; the back of the hollow blade is provided with an air release hole;
an oxygen supply fan is arranged and communicated to the hollow structure of the hollow rotating shaft through an oxygen supply pipeline;
the fermentation bin is also provided with a waste gas outlet which is connected with a waste gas exhaust fan;
a latticed biological filler supporting layer is arranged above the roof of the fermentation bin, and a biological filler layer is arranged on the biological filler supporting layer; an air distribution slit is formed between the roof of the fermentation bin and the biological filler supporting layer; the air outlet of the exhaust fan is introduced into the air distribution slit; a condensed water collecting tank is arranged on the lowest side of the roof of the fermentation bin which is inclined towards the discharging end;
a fermentation bin discharge port is arranged on the discharge side of the fermentation bin, and a decomposed sludge output machine is arranged outside the fermentation bin discharge port.
Furthermore, the angle of the whole fermentation bin inclining to the discharging end is 1-10. .
Furthermore, the outer surface of the fermentation cabin roof is provided with an epoxy resin coating.
Further, the fermentation bin is cylindrical.
Further, the hollow blade is an integral hollow helical blade; or the hollow blades are a plurality of independent hollow blades which are spirally arranged along the axial direction of the hollow rotating shaft, and each hollow blade inclines towards the discharge end.
Further, a belt weigher is arranged on the fermentation bin batching platform and connected to the material mixing and feeding integrated machine.
The beneficial effects of the utility model are embodied in:
1. the utility model discloses a continuous good oxygen fermentation system of lapse formula mud, but continuous feeding, fermentation, the ejection of compact, the operation is stable, has improved the circulation line efficiency of equipment such as fermentation storehouse, is convenient for realize automatic and high-level maintenance management. The fermentation bin is integrally inclined towards the discharging end by 1-10 degrees, materials in the fermentation bin move downwards along the slope by virtue of gravity, and the driving force and the energy consumption for pushing the materials to be discharged continuously are greatly reduced.
2. The oxygen supply fan is connected with the hollow rotating shaft through the air supply pipeline, the hollow structure of the hollow rotating shaft is communicated with the hollow structure of the hollow blade, and air is supplied to the fermentation material through the air release holes in the blade, so that a good and smooth fermentation air supply system is formed. Meanwhile, the hollow blades fixed on the hollow rotating shaft push the materials to move forward, and stir the mixed materials to promote oxygen transfer. The structure simplifies the system, improves the gas supply efficiency, reduces the gas supply amount of aerobic fermentation, improves the fermentation environment and reduces the operation cost.
3. The mixing and feeding integrated machine and the belt weigher are arranged, during feeding, the high-water-content excess sludge is mixed with biomass particles (various crushed straw wastes, yard cleaning garbage and garden wastes) in a low-water-content loose state and high-temperature fermentation decomposed materials, the moisture content of the materials is regulated to a range (50-60%) suitable for fermentation, the porosity and the air permeability of the materials to be fermented are improved, and the mass transfer of oxygen is improved. Meanwhile, the heat energy generated by the aerobic fermentation of the biomass improves the temperature and the decomposition speed of the material, enhances the evaporation of water in the material and reduces the water content of the decomposed sludge. Part of the high-temperature fermented and decomposed materials are returned to the feeding hole to be mixed with the residual sludge to be treated, a large number of thermophilic bacteria are inoculated to the materials, and the materials are rapidly heated by the aid of microorganisms in the sludge, so that the fermentation temperature is increased, the decomposition rate of the materials is increased, and the retention time of the materials in a fermentation bin is greatly shortened.
4. The waste gas outlet in the fermentation chamber is connected with a waste gas exhaust fan to maintain micro negative pressure in the fermentation chamber, so that the inorganization emission of waste gas is avoided. The waste gas in the fermentation chamber is mainly N2、CO2、O2And evaporating water vapor and a small amount of gaseous pollutant components, conveying the waste gas into a gas distribution slit between the fermentation bin roof and the biological filler supporting layer through a waste gas exhaust fan, and then permeating through the biological filler layer. The water vapor in the waste gas condenses and drips on the roof, converges on the condensed water collecting tank, and is independently treated in the inflow treatment tank to reach the standard and be discharged. Most of pollutants in the waste gas are decomposed by microorganisms, and a small part of pollutants enter condensed water, and the condensed water is further treated and then is discharged after reaching standards. On one hand, the heat preservation effect of the fermentation bin is enhanced, and the fermentation temperature is favorably improved; on the other hand, the packing layer has large area and small load, and improves the waste gas purification effect.
Drawings
FIG. 1 is a schematic view of the push-type sludge continuous aerobic fermentation system of the present invention, wherein the reference numerals are as follows: 1-fermentation chamber; 1A-a feed inlet; 2-a fermentation bin batching platform; 3, mixing and feeding the materials into an integrated machine; 4-a hollow rotating shaft; 5-hollow blades; 6-air release holes; 7-an exhaust gas outlet; 8-a waste gas exhaust fan; 9-an oxygen supply fan; 10-oxygen supply line; 11-a drive motor; 12-fermentation chamber roof; 13-a mesh-like biofilm carrier layer; 14-gas distribution slit; 15-a bio-filler layer; 16-a condensate collection tank; 17-a discharge hole of the fermentation bin; 18-decomposed sludge output machine.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to examples. The following is merely exemplary and illustrative of the inventive concept and various modifications, additions and substitutions which may be made by those skilled in the art to the specific embodiments described herein are intended to fall within the scope of the invention without departing from the spirit or scope of the invention as defined in the claims.
As shown in fig. 1, the push-type sludge continuous aerobic fermentation system of the present embodiment includes a fermentation chamber 1, wherein one side of the fermentation chamber 1 is a feeding end, and the other opposite side is a discharging end; the fermentation bin is integrally inclined towards the discharging end;
a feeding port 1A is arranged at the feeding end of the fermentation bin 1, the feeding port 1A is connected with a fermentation bin batching platform 2, and a material mixing and feeding integrated machine 3 is arranged at the feeding port 1A;
a hollow rotating shaft 4 is arranged in the fermentation bin 1 along the length direction of the fermentation bin 1, and the hollow rotating shaft 4 is driven by a driving motor 11; a hollow blade 5 is arranged along the axial direction of the hollow rotating shaft 4, and the hollow structure of the hollow rotating shaft 4 is communicated with the hollow structure of the hollow blade 5; the back surface (the surface of the back surface which is away from the discharging end) of the hollow blade 5 is provided with an air releasing hole 6;
an oxygen supply fan 9 is arranged, the oxygen supply fan 9 is communicated to the hollow structure of the hollow rotating shaft 4 through an oxygen supply pipeline 10, air enters the hollow blades 5 connected to the hollow rotating shaft and is released into the fermentation material through the air release holes 6, and oxygen required by the fermentation microorganisms is provided;
a waste gas outlet 7 is also arranged on the fermentation bin 1, and the waste gas outlet 7 is connected with a waste gas exhaust fan 8;
a latticed biological filler supporting layer 13 is arranged above the fermentation bin roof 12, and a biological filler layer 15 is arranged on the biological filler supporting layer 13; an air distribution slit 14 is formed between the roof of the fermentation chamber 1 and the biological filler supporting layer 13; the air outlet of the exhaust fan 8 is introduced into the air distribution slit 14; a condensed water collecting tank 16 is arranged at the lowest side of the fermentation chamber roof 12 which is inclined towards the discharging end;
a fermentation bin discharge port 17 is arranged on the discharge side of the fermentation bin 1, and a decomposed sludge output machine 18 is arranged outside the fermentation bin discharge port 17.
Furthermore, the fermentation bin is integrally inclined towards the discharging side by 1-10. . Specifically, in this embodiment, the fermentation chamber is inclined by 6 ° to the discharge side as a whole.
Further, the fermentation chamber 1 is cylindrical, has a length of 30m and a diameter of 5m, and has a longitudinal direction from the inlet side to the outlet side. Specifically, in this embodiment, the internal dimension of the fermentation chamber is: the length is 25m, the diameter is 3m,the volume of the chamber is 177m3. The cylindrical structure can effectively avoid the material from being detained at corners.
Further, the outer surface of the fermentation chamber roof 12 is provided with an epoxy resin coating to improve the performance of resisting the corrosion of impurities in condensed water on the surface.
Further, the hollow blade 5 may be an integral hollow helical blade. Or as shown, a series of individual hollow blades 5 arranged helically along the axis of the hollow rotating shaft, each hollow blade 5 being inclined towards the discharge end. Specifically, in the present embodiment, the diameter of the hollow rotating shaft is 25cm, the length of a series of hollow blades fixed on the hollow rotating shaft is 2.1m, the width of the blades is 25cm, the included angle between the blades and the shaft is 75-80 degrees, and the distance between the blades is 25 cm.
Further, the air release holes 6 on the hollow blade 5 are arranged on the back side and are recessed by 5mm, the diameter of each air release hole is 2mm, the air release holes are arranged along the extending direction of the blade, and the distance is 25-50 cm; or a slit is formed on the back surface of the blade, the length of the slit is equal to that of the blade, and the width of the slit is 5 mm.
Furthermore, the biological filler supporting layer is built into a grid shape by wood or plastic and is used for supporting the biological filler layer on the biological filler supporting layer; the biological packing layer is a loose granular material accumulation body with high porosity and low density, and has the functions of permeating gas, loading organisms and purifying pollutants in the gas.
Further, be provided with belt weigher 2A on fermentation storehouse batching platform 2, belt weigher 2A is connected to compounding feeding all-in-one 3.
The application method of the system comprises the following steps:
(1) metering excess sludge, biomass and thoroughly decomposed sludge to be treated in a feeding ground platform 2 according to a mass ratio of 2-10: 2:1, conveying the measured excess sludge, biomass and thoroughly decomposed sludge to a material mixing and feeding integrated machine 3, uniformly mixing the measured excess sludge, biomass and thoroughly decomposed sludge, and conveying the obtained mixed material to a fermentation bin 1; wherein: the biomass can be a material with a length of less than 10cm, which is obtained by crushing at least one of straw waste, yard cleaning garbage and garden waste, and the water content is not higher than 30%. The decomposed sludge is the sludge discharged from the discharge port 17 of the fermentation bin after being treated by the system of the embodiment.
Specifically, in this embodiment: the water content of the sludge to be treated is 80-85%; the biomass is a material with the length not more than 10cm obtained by crushing straw waste in a storage workshop and the water content of the material is 20 percent; the water content of the decomposed sludge is 30 percent. The three raw materials are mixed according to the mass ratio of 6:2:1, and the water content of the obtained mixed material is 55-65%.
(2) Under the drive of a drive motor 11, a hollow rotating shaft 4 in the fermentation bin rotates to drive a hollow blade 5 to stir the mixed material, and meanwhile, the mixed material is pushed towards a discharging end, and the retention time of the mixed material in the fermentation bin is 3-6 d;
specifically, in this embodiment: the rotating speed of the hollow rotating shaft is 1 rpm;
(3) air required by aerobic fermentation enters the hollow rotating shaft 4 of the fermentation bin 1 through the oxygen supply fan 9 and the oxygen supply pipeline 10, then enters the hollow blades 5, and is released into the material through the air release holes 6 on the back of the hollow blades 5 to supply oxygen for the aerobic fermentation of microorganisms;
specifically, in this embodiment: the temperature of the mixed materials in the fermentation chamber is rapidly raised to be higher than 45 ℃, a high-temperature area is stabilized at 65-75 ℃, the mixed wet materials are rapidly decomposed and evaporated under the action of aerobic microorganisms, and the mixed materials stay in the fermentation chamber for 4 days to be basically decomposed;
(4) fermented decomposed sludge is continuously discharged from a discharge hole 17 of the fermentation bin and is conveyed to a decomposed sludge storage by a decomposed sludge output machine 18;
specifically, according to the mass ratio of the three raw materials of 6:2:1, conveying part of decomposed sludge to a feeding ground platform (2), feeding the part of decomposed sludge, the sludge and biomass into a material mixing and feeding integrated machine to serve as a sludge aerobic rapid fermentation thermophilic microorganism source, and conveying the rest part of decomposed sludge to a decomposed sludge storage for natural ventilation and storage for 20-40 days for further stabilization and sale.
(5) A waste gas outlet 7 of the fermentation bin is connected with a waste gas exhaust fan 8 to maintain micro negative pressure in the fermentation bin (the micro negative pressure is used for avoiding the unorganized emission of waste gas, and has no requirement on the numerical value of a pressure matrix); the waste gas exhaust fan 8 conveys the waste gas in the fermentation chamber into the gas distribution slit 14; the airflow penetrates through the biological filler supporting layer 13, is purified by the biological filler layer 15 and is released into the atmosphere; the water vapor in the air flow is condensed and then drops to the roof of the fermentation chamber, and then flows to the condensed water collecting tank 16 automatically.
The condensed water in the condensed water collecting tank 16 is treated to reach the standard and discharged.
Claims (6)
1. A push type sludge continuous aerobic fermentation system is characterized in that: the fermentation device comprises a fermentation bin (1), wherein one side of the fermentation bin (1) is a feeding end, and the other opposite side of the fermentation bin is a discharging end; the fermentation bin is integrally inclined towards the discharging end;
a feeding hole (1A) is formed in the feeding end of the fermentation bin (1), the feeding hole (1A) is connected with a fermentation bin batching platform (2), and a material mixing and feeding integrated machine (3) is arranged at the feeding hole (1A);
a hollow rotating shaft (4) is arranged in the fermentation bin (1) along the length direction of the fermentation bin (1), and the hollow rotating shaft (4) is driven by a driving motor (11); a hollow blade (5) is arranged along the axial direction of the hollow rotating shaft (4), and the hollow structure of the hollow rotating shaft (4) is communicated with the hollow structure of the hollow blade (5); the back of the hollow blade (5) is provided with an air release hole (6);
an oxygen supply fan (9) is arranged, and the oxygen supply fan (9) is communicated to the hollow structure of the hollow rotating shaft (4) through an oxygen supply pipeline (10);
a waste gas outlet (7) is also arranged on the fermentation bin (1), and the waste gas outlet (7) is connected with a waste gas exhaust fan (8);
a latticed biological filler supporting layer (13) is arranged above the fermentation bin roof (12), and a biological filler layer (15) is arranged on the biological filler supporting layer (13); an air distribution slit (14) is formed between the roof of the fermentation bin (1) and the biological filler supporting layer (13); the air outlet of the exhaust fan (8) is introduced into the air distribution slit (14); a condensed water collecting tank (16) is arranged at the lowest side of the fermentation chamber roof (12) which is inclined towards the discharging end;
a fermentation bin discharge port (17) is arranged at the discharge side of the fermentation bin (1), and a decomposed sludge output machine (18) is arranged outside the fermentation bin discharge port (17).
2. The push-type sludge continuous aerobic fermentation system as claimed in claim 1, wherein: the angle of the whole fermentation bin inclining to the discharging end is 1-10 degrees.
3. The push-type sludge continuous aerobic fermentation system as claimed in claim 1, wherein: the outer surface of the fermentation bin roof (12) is provided with an epoxy resin coating.
4. The push-type sludge continuous aerobic fermentation system as claimed in claim 1, wherein: the fermentation bin (1) is cylindrical.
5. The push-type sludge continuous aerobic fermentation system as claimed in claim 1, wherein: the hollow blade (5) is an integral hollow helical blade; or the hollow blades (5) are a plurality of independent hollow blades which are spirally arranged along the axial direction of the hollow rotating shaft, and each hollow blade (5) inclines towards the discharge end.
6. The push-type sludge continuous aerobic fermentation system as claimed in claim 1, wherein: be provided with belt weigher (2A) on fermentation storehouse batching platform (2), belt weigher (2A) are connected to compounding feeding all-in-one (3).
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| CN201921641756.9U CN210915777U (en) | 2019-09-29 | 2019-09-29 | Push type sludge continuous aerobic fermentation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110550834A (en) * | 2019-09-29 | 2019-12-10 | 安徽安特治废弃物资源化研究中心有限公司 | Push type sludge continuous aerobic fermentation system and application method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110550834A (en) * | 2019-09-29 | 2019-12-10 | 安徽安特治废弃物资源化研究中心有限公司 | Push type sludge continuous aerobic fermentation system and application method thereof |
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