CN109987809B - Sludge aerobic fermentation system - Google Patents
Sludge aerobic fermentation system Download PDFInfo
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- CN109987809B CN109987809B CN201910245348.XA CN201910245348A CN109987809B CN 109987809 B CN109987809 B CN 109987809B CN 201910245348 A CN201910245348 A CN 201910245348A CN 109987809 B CN109987809 B CN 109987809B
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- 239000010802 sludge Substances 0.000 title claims abstract description 111
- 238000010564 aerobic fermentation Methods 0.000 title claims abstract description 42
- 238000005273 aeration Methods 0.000 claims abstract description 124
- 238000000855 fermentation Methods 0.000 claims abstract description 124
- 230000004151 fermentation Effects 0.000 claims abstract description 124
- 238000007599 discharging Methods 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 98
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000007790 scraping Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 235000010855 food raising agent Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000002068 microbial inoculum Substances 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a sludge aerobic fermentation system which comprises a feeding device, a fermentation tank, an aeration device and a discharging device, wherein the feeding device is used for feeding sludge to the upper end of the fermentation tank and feeding the sludge into the fermentation tank for fermentation, and the sludge is fed out of the fermentation tank through the discharging device after oxygen fermentation is provided by the aeration device; the aeration device comprises an air inlet pipe and a plurality of aeration units flexibly connected with the air inlet pipe, and the aeration units are distributed in the fermentation tank. The invention provides a sludge aerobic fermentation system which is convenient to install and transport and can effectively improve the aerobic fermentation efficiency.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge aerobic fermentation system.
Background
The sludge is enriched with organic matters, nitrogen, phosphorus, potassium and other nutrient elements which cause water pollution, contains a large number of pathogenic microorganisms, is easy to rot and stink, can cause serious environmental pollution and ecological damage if improperly treated, and is also a great resource waste. At present, only about 10-20% of sludge in China realizes safe and harmless treatment, and a large amount of sludge cannot be effectively treated.
At present, the main treatment modes of sludge treatment at home and abroad are landfill, drying incineration and land utilization, and an anaerobic digestion technology and an aerobic fermentation technology are mainly applied to the treatment process. The sludge aerobic fermentation technology is a novel biological treatment technology for fermenting by utilizing microorganisms in sludge, namely, a certain proportion of leavening agent and conditioning agent are added into the sludge, and the microorganisms are used for oxidizing and decomposing various organic matters in a humid environment and converting the organic matters into humic-like substances with higher stability, so that the effect of stabilization, innocuity, reduction and recycling can be achieved in practical application, and the sludge aerobic fermentation technology has the characteristics of economy, practicability, no need of external energy, no secondary pollution and the like, and is suitable for the practical technology of sludge treatment and disposal.
The aerobic fermentation technology has been greatly developed in recent years, and the aerobic fermentation technology is adopted in most of the current domestic sludge treatment, especially in the south China area. However, aerobic fermentation still faces more factors restricting further application, mainly comprising occupied area, auxiliary materials, intelligent control, miniaturization, device integration, inoculation of microbial inoculum, odor treatment and the like.
With the support of national related industrial policies, aerobic fermentation is one of the main processes for solving urban sludge outlet. The urban sludge is treated by aerobic fermentation, and especially the small intelligent sludge aerobic fermentation technical equipment has the advantages of small occupied area, high self-control degree, stable operation, quick temperature rise, complete harmlessness, low odor, resource realization and the like, solves the problem of urban sludge treatment, eliminates the threat of secondary pollution environment of urban sludge, achieves the purposes of stabilizing, harmlessly treating, reducing and recycling the sludge, and has very wide market prospect and application value.
However, in the existing sludge aerobic fermentation system, organic matters (sludge), water and strains (microorganisms) are mixed in a fermentation bin, oxygen is introduced from the bottom end of the fermentation bin, and the strains are required to oxidize the organic matters in an oxygen environment, so that the stacking height of the sludge cannot be too high, the lower part of the stack body cannot be compacted due to the weight of the sludge when the height is too high, normal ventilation cannot be performed, good oxygen environment cannot be provided for the strains, and the aerobic fermentation cannot be continuously performed, so that the fermentation effect is affected.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides the sludge aerobic fermentation system which is convenient to install and transport and effectively improves the aerobic fermentation efficiency.
In order to solve the technical problems, the invention provides a sludge aerobic fermentation system which comprises a feeding device, a fermentation tank, an aeration device and a discharging device, wherein the feeding device is used for feeding sludge to the upper end of the fermentation tank and feeding the sludge into the fermentation tank for fermentation, and the sludge is fed out of the fermentation tank through the discharging device after being subjected to oxygen fermentation by the aeration device;
The aeration device comprises an air inlet pipe and a plurality of aeration units flexibly connected with the air inlet pipe, and the aeration units are distributed in the fermentation tank.
Preferably, the aeration unit is installed in the fermentation tank through a cam vibration mechanism;
the cam vibration mechanism comprises a support frame, a vibration rod and a cam mechanism, wherein a spring is arranged on the support frame, the vibration rod is elastically connected to the support frame through the spring, and the aeration unit is connected to the vibration rod in a transmission manner;
The cam mechanism comprises a cam shaft mounting seat, a cam shaft, a cam driving motor and a cam, wherein the cam shaft mounting seat is fixed on the fermentation tank, the cam driving motor drives the cam shaft to rotate, the cam shaft rotates to drive the cam to rotate, the cam rotates to drive the vibrating rod to vibrate, and the vibrating rod vibrates to drive the aeration unit to reciprocate up and down on the support frame.
Preferably, the aeration unit is provided with a plurality of aeration pipes, the aeration pipes are flexibly connected with the air inlet pipe through connecting branch pipes, and each aeration pipe is provided with a plurality of aeration holes;
Or, the connecting branch pipes are horizontally arranged in the fermentation tank side by side, a plurality of layers are longitudinally arranged, the aeration pipes are vertically connected in the connecting branch pipes side by side, and a plurality of aeration holes are distributed on the side wall of the aeration pipes in the axial direction and the circumferential direction.
Preferably, the aeration holes are formed through the wall of the aeration pipe, the inlet of the aeration holes in the wall of the aeration pipe is small, the outlet of the aeration holes outside the wall of the aeration pipe is large, and the aeration holes are arranged obliquely downwards from the inlet of the aeration holes to the outlet of the aeration holes.
Preferably, the feeding device comprises a shaftless screw conveyor, the shaftless screw conveyor comprises a shaftless screw blade and a shaftless screw driving device, wherein the shaftless screw blade is installed in an inclined mode, and the shaftless screw driving device drives the shaftless screw blade to convey sludge to the fermentation tank in an inclined mode.
Preferably, the inner edge of the shaftless spiral blade is provided with a baffle plate, the baffle plate is arranged along the inner edge of the shaftless spiral blade and is fixed on the shaftless spiral blade, and the baffle plate is matched with the upper surface of the shaftless spiral blade to prevent sludge from being poured into the central inner hole of the shaftless spiral blade;
Or the baffle plate is integrally formed and connected with the inner edge of the shaftless spiral blade and is arranged at one side of the shaftless spiral blade facing the material conveying direction;
Or, the outer edge of the shaftless spiral blade is provided with a scraping plate, one side of the scraping plate is connected with the outer edge of the shaftless spiral blade, and the other side of the scraping plate scrapes materials towards the inner wall of the pipe shell;
or, the scraper is arranged along the outer edge of the shaftless helical blade;
Or the scraping plate is an integrally formed inclined plane and is arranged at the outer edge of the shaftless spiral blade.
Preferably, the fermentation tank is provided with a fermentation tank discharge port, and the fermentation tank discharge port is provided with a discharge device;
The discharging device comprises a discharging machine shell, two rotary shafts which are arranged side by side are arranged in the discharging machine shell, a plurality of coulter blades are arranged on the outer wall of the rotary shafts, and the coulter blades are spirally distributed on the outer wall surface of the rotary shafts; the rotation directions of the two rotating shafts are the same or opposite, the upper part of one end of the shell of the discharging machine is communicated with the discharging hole of the fermentation box, the other end of the shell of the discharging machine is provided with a material discharging hole, and the rotating shafts cut and convey materials through coulter blades;
the rotary shaft is axially provided with coulter type blades, the outer edges of the coulter type blades are provided with coulter tips for cutting materials, and the coulter tips face to one side of the coulter type blades, which is away from the conveying direction of the materials.
Preferably, the end part of the discharge end of the rotating shaft is matched with a throwing wheel device for throwing materials to a material discharge port;
the throwing wheel device comprises a throwing wheel driving piece and a throwing wheel driven by the throwing wheel driving piece, wherein the throwing wheel comprises a roller and a stirring tooth piece fixedly arranged on the outer wall of the roller, and the throwing wheel driving piece drives the roller to rotate so as to drive the stirring tooth piece to rotate, and the sludge material is smashed, thrown up and thrown to a material discharge hole;
or a plurality of stirring tooth plates are arranged and spirally distributed on the outer wall of the roller;
Or the outer edge of the stirring tooth piece is zigzag.
Preferably, a plurality of exhaust structures are arranged in the fermentation box, and each exhaust structure comprises an exhaust cavity and a porous screen plate, wherein the exhaust cavity is arranged in the fermentation box in a penetrating way, and the porous screen plate is arranged at the periphery of the exhaust cavity;
Or the exhaust structure is a cavity type thin wall arranged in the fermentation box and comprises a cavity which is vertically communicated and a porous screen plate at two sides of the cavity, and the cavity type thin wall divides the fermentation box into a plurality of fermentation units;
or, the fermentation box comprises a box shell, a box inner layer is arranged on the inner wall of the box shell, a gap wall is reserved between the box inner layer and the box shell for circulation, and the box inner layer is formed by porous mesh plates.
Preferably, a scraper type material leveling mechanism is also arranged;
The scraper type material leveling mechanism is arranged at the upper end in the fermentation box; the scraper type material flattening mechanism comprises a transmission chain and a chain wheel, wherein the transmission chain is provided with a scraper, the chain wheel drives the transmission chain to rotate, and the scraper is used for flattening materials; the sprocket is installed in the inside upper end of fermentation vat, and the drive chain link up and distribute in the fermentation vat.
Compared with the prior art, the invention has the beneficial effects that: the sludge aerobic fermentation system does not need pit digging to occupy land resources; the transportation and the installation are convenient, and the installation position can be flexibly selected; the sludge materials can be effectively stirred, mixed and ventilated, the aerobic fermentation is full, the automation degree is high, the operation is stable, the porous screen plate design can meet the discharge of water vapor and hot air, and the efficiency of the sludge aerobic fermentation can be improved.
Drawings
Fig. 1 is a schematic structural view of embodiment 1;
fig. 2 is a schematic view of the structure of an aeration device of embodiment 1;
FIG. 3 is a side view of example 1;
FIG. 4 is a sectional view of an aeration apparatus of example 1;
fig. 5 is a sectional view of the aeration apparatus of example 1;
FIG. 6 is a sectional view of the aeration tube of example 1 on the airway;
FIG. 7 is a side view of the outfeed device of example 1;
Fig. 8 is a schematic structural view of the feeding device of embodiment 1;
FIG. 9 is an enlarged view of a portion of the shaftless spiral vane of FIG. 8;
FIG. 10 is a cross-sectional view of the shaftless spiral vane of FIG. 9;
Fig. 11 is a schematic structural view of a wheel throwing device of embodiment 1;
fig. 12 is a schematic structural view of a throwing wheel of embodiment 1;
The reference numerals in the figures are: a feeding device 1; a tube shell 11; a shaftless screw conveyor 12; shaftless helical blades 121; shaftless screw drive 122; a flap 1211; a scraper 1212; a fermentation tank 2; an exhaust structure 21; a vent cavity 211; a porous mesh plate 212; a cavity 221; a fermentation unit 201; a case housing 24; an inner layer 25 of the case; an aeration device 3; an intake pipe 31; an aeration unit 32; a connecting branch pipe 321; an air volume flowmeter 3211; an aerator pipe 322; aeration holes 323; a blower 311; a discharging device 4; a housing 41; a rotation shaft 42; a material outlet 43; coulter blade 44; a blade tip 441; a wheel throwing device 45; a drum 452; a transmission member 451; a kick-out tooth 453; a material outlet 23; a cam vibration mechanism 5; a support frame 51; a spring 511; a cam mechanism 52; a camshaft mounting base 521; a camshaft 522; a cam driving motor 523; a cam 524; a vibrating rod 53; a scraper type material leveling mechanism 6; a transmission chain 61; a sprocket 62; a scraper 63.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
Example 1
As shown in fig. 1-12, the sludge aerobic fermentation system comprises a feeding device 1, a fermentation tank 2, an aeration device 3 and a discharging device 4, wherein the feeding device 1 conveys sludge materials to the upper end of the fermentation tank 2 and throws the sludge materials down from the upper end, the sludge materials are sent into the fermentation tank 2 for fermentation, and after the sludge materials are provided with oxygen by the aeration device for fermentation, the sludge materials are sent out of the fermentation tank 2 by the discharging device 4; wherein, aeration equipment 3 includes intake pipe 31 and a plurality of aeration units 32 of UNICOM intake pipe 31, and aeration units 32 distributes in fermentation tank 2 provides oxygen for the abundant fermentation of mud.
The system utilizes fermentation box body fermentation, solves the problems of immobility of a fermentation device of pit filling type fermentation in the prior art and insufficient aerobic fermentation caused by difficult air circulation, and the feeding device 1, the fermentation box 2, the aeration device 3 and the discharging device 4 in the structure can be transported and installed in a split mode, are suitable for application, are flexible in placement position, do not occupy land resources, are matched with the aeration device in the fermentation box, solve the problems that the sludge material fermentation box is easy to compact and difficult to guarantee in ventilation and temperature control, and the aeration units 32 are distributed and fully distributed in the whole fermentation box 2, so that sludge materials in the fermentation box can be fully subjected to aerobic fermentation, and the aerobic fermentation rate is improved.
The aeration unit 32 includes a plurality of aeration pipes 322, and the aeration pipes 322 are flexibly connected with the air inlet pipe 31 at the air inlet end through a connecting branch pipe 321.
The connecting branch pipes 322 are horizontally arranged on the fermentation tank 2 side by side, a plurality of layers are longitudinally arranged, each two adjacent connecting branch pipes 322 are arranged in parallel and have the same interval, the aeration pipes 322 are vertically connected with the connecting branch pipes 321 side by side, and the side walls of the aeration pipes 322 are provided with a plurality of aeration holes 323 in the axial direction and the circumferential direction.
In this regard, through the disposition of connecting branch 321 and aeration pipe 322, be the latticed distribution in the fermentation tank in the horizontal direction, be the layering distribution in fermentation tank 2 in the vertical direction, formed and spread aeration hole 323 in fermentation tank 2 to satisfy the required of the aerobic fermentation of the mud material of each different positions in fermentation tank 2, improve the good oxygen fermentation rate of mud.
The aeration holes 323 penetrate through the wall of the aeration pipe 322, the aeration holes 323 are large in inlet of the aeration holes in the wall of the aeration pipe, small in outlet of the aeration holes outside the wall of the aeration pipe, and the aeration holes 323 are obliquely downwards arranged from the inlet of the aeration holes to the outlet of the aeration holes.
In the system, the air inlet pipe 31 is provided with a fan 311 to provide the air volume required by the aeration pipe 322, the connecting branch pipes 321 are provided with an air volume flowmeter 3211 to monitor the air volume of each connecting branch pipe 321 and the aerobic fermentation degree,
The aeration unit 32 is vibratingly installed in the fermentation tank 2, and the aeration unit 32 is flexibly connected to the air inlet pipe 31, so that the aeration unit 32 can flexibly vibrate without affecting the stable installation of the whole aeration device.
The aeration unit 32 is installed on the fermentation tank 2 in a vibrating manner through the cam vibrating mechanism 5, and if the aeration unit 32 is installed in a vibrating manner, the sludge on the aeration unit 32 can be conveniently shaken off, so that the smoothness of aeration holes is ensured. The aeration unit 32 can drive the vibration of the sludge material along with the vibration of the cam vibration mechanism 5, so that the agglomerated sludge is scattered, the sludge material can be fully contacted with air, and the aerobic fermentation rate is improved.
The whole aeration holes 323 are wedge-shaped in cross section and distributed in different annular directions and different heights of the aeration pipe 322, so that the aeration pipe 322 is further fully distributed with the aeration holes 323 in the height direction. Each aeration hole 323 is designed with a small inlet and a large outlet, so that when air flows pass through, the air flow can be increased due to instant compression, the strength of the air flow for flushing the sludge in the aeration hole is improved, meanwhile, the probability of flushing the sludge into the air passage is reduced due to the wedge shape, and the risk of blocking the air passage by the sludge is reduced. In addition, the design that aeration hole 323 is inclined downwards from the inlet of the aeration hole to the outlet of the aeration hole, so that sludge can easily slide out of the air passage, when the sludge falls to the outlet end of the aeration hole to block the aeration hole, the air in the aeration hole pipe is discharged and the pressure is increased until the air exceeds the static pressure at the tail end of the outlet of the aeration hole, so that axial airflow is formed in the aeration hole and negative pressure is generated, the sludge blocking the aeration hole is discharged, the blocking problem is solved, the smoothness of ventilation air of the aeration hole 322 is ensured, and the circulation quantity of air required by aerobic fermentation can be effectively ensured.
The cam vibration mechanism comprises a support frame 51, a vibration rod 53 and a cam mechanism 52, wherein a spring 511 is arranged on the support frame, the vibration rod 53 is elastically connected to the support frame 51 through the spring, and the aeration unit 32 is in transmission connection with the vibration rod 53;
The cam mechanism 52 comprises a cam shaft mounting seat 521, a cam shaft 522, a cam driving motor 523 and a cam 524, wherein the cam shaft mounting seat 521 is fixed on the fermentation tank 2, the cam driving motor 523 drives the cam shaft 522 to rotate, the cam shaft 522 rotates to drive the cam 524 to rotate, the cam 524 rotates to drive the vibrating rod 53 to vibrate, and the vibrating rod 53 vibrates to drive the aeration unit 32 to reciprocate up and down on the support frame.
The aeration units 32 are distributed in the fermentation tank 2 in a net shape, and the cam mechanism 52 is used for helping to realize stable vibration of the aeration units 32, so that the vibration of the aeration units 32 is not easy to cause structural damage, and particularly the vibration of the aeration units 32 is very difficult when the sludge is fed into the fermentation tank 2 for fermentation, and the cam mechanism 52 can ensure the vibration of the aeration units 32. The vibration of the aeration unit 32 is beneficial to shaking off the sludge material on the aeration holes 323, and the vibration of the aeration unit 32 drives the sludge material to be stirred, so that the contact between the sludge and a good oxygen environment is promoted, and the aerobic fermentation rate is improved.
The feeding device 1 comprises a tube shell 11 and a shaftless screw conveyor 12, the shaftless screw conveyor 12 comprises shaftless screw blades 121 and shaftless screw driving devices 122 for driving the shaftless screw blades 121 to rotate, the shaftless screw blades 121 are arranged in the tube shell 11, the shaftless screw blades 12 rotate to convey sludge to the fermentation tank 2, the shaftless screw blades 121 are installed in an inclined mode, one side with high height is supported by the fermentation tank 2, one side with low height is connected with a position for containing sludge materials, and the shaftless screw driving devices 122 are used for conveying sludge to the fermentation tank 2 in an inclined mode.
The sludge materials used for aerobic fermentation are uneven in agglomeration, very heavy and easy to bond, so that for the reason, the existing sludge materials are easy to dig out of a sludge pond on the land directly to serve as a fermentation tank, land resources are occupied, the installation position and transportation of a sludge fermentation system are limited, and the wide use and popularization of the sludge aerobic fermentation are difficult to realize.
The shaftless screw feeder of slope in this structure adopts the shaftless screw blade of slope formula of placing, has decomposed the direction of the required direction in the mud material transport, has reduced the gravity of unidirectional direction mud material, can realize that the mud material is stably carried to the upper end of fermenting case to relatively consume less energy. Meanwhile, the inclined shaftless spiral feeder provided by the invention is installed by utilizing the fermentation box, so that the sludge material is convenient to convey.
The inner edge of the pushing surface of the shaftless spiral blade 121 is provided with a baffle 1211, the baffle 1211 is fully distributed along the inner edge of the shaftless spiral blade and is fixed on the shaftless spiral blade, and the baffle 1211 cooperates with the pushing surface of the shaftless spiral blade 121 to prevent sludge from being poured into the central inner hole of the shaftless spiral blade 121.
The baffle 1211 is integrally formed and connected to the inner edge of the shaftless spiral blade 121, and is disposed at one side of the shaftless spiral blade 121 facing the material conveying direction;
the outer edge of the shaftless spiral blade 121 is provided with a scraping plate 1212, one side of the scraping plate 1212 is connected with the outer edge of the shaftless spiral blade 121, and the other side of the scraping plate 1212 scrapes materials towards the inner wall of the pipe shell 11;
the scraper 1212 is disposed along the outer edge of the shaftless helical blade 121;
the scraper 1212 is an integrally formed bevel disposed on the outer edge of the shaftless helical blade.
In this structure, select to use fermentation tank 2 to realize the good oxygen fermentation of mud, mud needs to throw into the fermentation tank from fermentation tank upper end, and mud material bonds, and is thick, is difficult to carry, in this structure, selects to use shaftless helical blade to set up the separation blade at shaftless helical blade inner edge. Because the sludge material belongs to the objects with high density and low viscosity among the materials, under the action of dead weight, a plurality of objects are held on the pushing surface of the shaftless helical blade 121 and are conveyed upwards along the tube shell 11 in an inclined way along with the rotation of the objects, but when the sludge material flows towards the direction of the central inner hole of the shaftless helical blade 121, the sludge material is blocked by the blocking piece 1211, the falling of the sludge material from the central inner hole of the shaftless helical blade is blocked, and the possibility that the sludge material conveyed upwards is conveyed upwards repeatedly and upwards is reduced. The baffle plate is integrally formed and arranged at the inner edge of the shaftless spiral blade 121, so that the installation is simplified, and the stability of the installation of the baffle plate is improved.
The doctor blade that shaftless helical blade's outward flange set up utilizes shaftless helical blade to rotate, drives the doctor blade and scrapes out the mud in the casing, avoids casing inner wall mud siltation to influence shaftless helical blade and carries the mud material, and doctor blade integrated into one piece makes at shaftless helical blade's outward flange, has simplified the installation, the stability of scraper 1212 connection that improves.
In this structure, shell 11 chooses half-and-half type shell, for cooperation shaftless helical blade, shell 11 also installs at the axial slope, and screw feeder can install half shell earlier, installs shaftless helical blade, closes the shell of the installation half again, is convenient for shell 11 slope installation, and shaftless helical blade's installation, also is convenient for the clearance of shell 11 inner wall.
The fermentation tank 2 is provided with a fermentation tank discharge port 23, and the fermentation tank discharge port 23 is provided with a discharge device 4;
The discharge device comprises a discharge housing 41,
Two rotary shafts 42 arranged side by side are arranged in the discharging machine shell 41, a plurality of coulter blades 44 are arranged on the outer wall of the rotary shafts 42, and the coulter blades 44 are spirally distributed on the outer wall surface of the rotary shafts 42; the rotation directions of the two rotation shafts 42 are the same or opposite, one end upper part of the discharger shell 41 is communicated with the fermentation tank discharge port 23, the other end is provided with a material discharge port 43, and the rotation shafts 42 cut and push sludge materials through coulter blades 44.
The rotary shaft 42 is uniformly provided with a coulter type blade 44, the outer edge of the coulter type blade 44 is provided with a coulter point 441 for chamfering materials, and the coulter point 441 is arranged at one side of the coulter type blade 44 away from the conveying direction of the materials;
the end part of the discharge end of the rotating shaft 42 is matched with a throwing wheel device 45 for throwing materials to a material discharge hole.
When the sludge is discharged from the fermentation tank, the sludge is thick and heavy, the sludge is difficult to transport, the rotation directions of the bright rotating shafts are the same or opposite through the design of the rotation of the two rotating shafts, the sludge can be stirred, the coulter type blades are matched with the design of the rotating shafts, the coulter type blades are used for cutting and pushing the sludge materials, and the sludge materials after fermentation are sent to the material discharge port.
The throwing wheel device 45 comprises a throwing wheel driving member 451 and a throwing wheel driven by the same, wherein the throwing wheel comprises a roller 452 and a stirring tooth 453 fixedly arranged on the outer wall of the roller 452, and the throwing wheel driving member 451 drives the roller 452 to rotate so as to drive the stirring tooth 453 to rotate, and the sludge material is smashed, thrown up and thrown to a material discharge port. In this system, the roller 452 is disposed transversely across the discharge end of the shaft 42 to facilitate cutting and throwing of the sludge material.
The material stirring teeth 453 are provided with a plurality of material stirring teeth 453, the material stirring teeth 453 are connected to form a spiral and are arranged on the outer wall of the roller 452, and the outer edges of the material stirring teeth 453 are zigzag.
The sludge is deposited through the fermentation tank, so that the transportation and the fermentation of the secondary fermentation of the sludge are affected by the sludge deposition, the design of the throwing wheel is realized, the stirring tooth 453 on the outer wall of the roller 452 is used for stirring materials and throwing the materials to the material discharge port, the sludge deposition can be dispersed, good conditions are provided for stirring the leavening agent and the conditioner for the secondary fermentation of the sludge, the stirring and throwing and crushing of the sludge promote the heat dissipation of the sludge, and the sludge is prevented from generating odor by the fermentation outside the fermentation tank.
Each material stirring tooth 453 is connected and spirally arranged on the outer wall of the roller 451, so that the installation strength of the material stirring tooth 453 is improved, and the material stirring area is increased. The outer wall of the roller 451 is fully covered with spiral material stirring teeth plates formed by connecting material stirring teeth plates 453, the spiral material stirring teeth plates are distributed in parallel, and a gap is reserved in the middle for containing cut sludge materials. The provision of a saw tooth at the outer edge of the deflector tooth 453 improves the ability of the wheel throwing device to cut material.
A plurality of exhaust structures 21 are arranged in the fermentation tank 2, and each exhaust structure comprises an exhaust cavity 211 and a porous screen 212 which are arranged at the periphery of the exhaust cavity 221 in the fermentation tank 2 in a penetrating way;
the exhaust structure 21 is a cavity type thin wall arranged in the fermentation tank 2 and comprises a cavity 221 which is vertically communicated with the cavity and porous screen plates 212 at two sides of the cavity 221, and the cavity type thin wall divides the fermentation tank 2 into a plurality of fermentation units 201.
In the system, the fermentation tank 2 is provided with a tank shell 24, a layer of tank inner layer 25 is arranged on the inner wall of the tank shell 24, a gap wall is reserved between the tank inner layer 25 and the tank shell 24 for circulation, and the tank inner layer is composed of porous mesh plates.
The fermentation box is isolated to form a plurality of fermentation spaces through the inner layer of the box body and the porous screen plate, so that the emission of water vapor and hot air during fermentation is facilitated, the safe fermentation of the fermentation box body is improved, and the fermentation rate of the sludge aerobic fermentation is improved.
The device is also provided with a scraper type material leveling mechanism 6, and the scraper type material leveling mechanism 6 is arranged at the upper end in the fermentation tank 2; the scraper type material leveling mechanism 6 comprises a transmission chain 61 and a chain wheel 62, the transmission chain 61 is provided with a scraper 63, the chain wheel 62 drives the transmission chain 61 to rotate, and the scraper 63 levels materials; the chain wheel 62 is arranged at the upper end of the interior of the fermentation tank 2, and the transmission chain 61 is distributed in the fermentation tank 2 in a penetrating way.
The scraper type material leveling mechanism 6 avoids unbalanced accumulation of sludge materials in the fermentation tank and influences the conveying of the sludge materials and the aerobic fermentation of the sludge.
The fermentation tank is provided with the air outlet and is provided with the induced draft device and the deodorizing device, so that the pollution of the sludge aerobic fermentation system to the environment is effectively solved.
Finally, it should be noted that the above list is only specific embodiments of the present invention. Obviously, the invention is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (5)
1. The utility model provides a mud aerobic fermentation system which characterized in that: the device comprises a feeding device, a fermentation tank, an aeration device and a discharging device, wherein the feeding device is used for feeding sludge to the upper end of the fermentation tank, feeding the sludge into the fermentation tank for fermentation, and feeding the sludge from the fermentation tank through the discharging device after the sludge is subjected to oxygen fermentation by the aeration device; the aeration device comprises an air inlet pipe and a plurality of aeration units flexibly connected with the air inlet pipe, and the aeration units are distributed in the fermentation tank;
The aeration unit is arranged in the fermentation tank through a cam vibration mechanism; the cam vibration mechanism comprises a support frame, a vibration rod and a cam mechanism, wherein a spring is arranged on the support frame, the vibration rod is elastically connected to the support frame through the spring, and the aeration unit is connected to the vibration rod in a transmission manner; the cam mechanism comprises a cam shaft mounting seat, a cam shaft, a cam driving motor and a cam, wherein the cam shaft mounting seat is fixed on the fermentation box, the cam driving motor drives the cam shaft to rotate, the cam shaft rotates to drive the cam to rotate, the cam rotates to drive the vibrating rod to vibrate, and the vibrating rod vibrates to drive the aeration unit to reciprocate up and down on the support frame;
The aeration unit is provided with a plurality of aeration pipes, the aeration pipes are flexibly connected with the air inlet pipe through connecting branch pipes, and each aeration pipe is provided with a plurality of aeration holes;
The connecting branch pipes are horizontally arranged in parallel in the fermentation tank, a plurality of layers are longitudinally arranged, the aeration pipes are vertically connected in parallel in the connecting branch pipes, and a plurality of aeration holes are distributed on the side walls of the aeration pipes in the axial direction and the circumferential direction;
The aeration holes penetrate through the wall of the aeration pipe, the inlets of the aeration holes in the wall of the aeration pipe are small, the outlets of the aeration holes outside the wall of the aeration pipe are large, and the aeration holes are obliquely downwards arranged from the inlets of the aeration holes to the outlets of the aeration holes;
The fermentation tank is provided with a fermentation tank discharge hole, and the fermentation tank discharge hole is provided with a discharge device; the discharging device comprises a discharging machine shell, two rotary shafts which are arranged side by side are arranged in the discharging machine shell, a plurality of coulter blades are arranged on the outer wall of the rotary shafts, and the coulter blades are spirally distributed on the outer wall surface of the rotary shafts; the rotation directions of the two rotating shafts are the same or opposite, the upper part of one end of the shell of the discharging machine is communicated with the discharging hole of the fermentation box, the other end of the shell of the discharging machine is provided with a material discharging hole, and the rotating shafts cut and convey materials through coulter blades; the rotary shaft is axially provided with coulter blades, the outer edges of the coulter blades are provided with coulter tips for cutting materials, and the coulter tips face to one side of the coulter blades, which is away from the conveying direction of the materials;
the end part of the discharge end of the rotating shaft is matched with a throwing wheel device for throwing materials to a material discharge port; the throwing wheel device comprises a throwing wheel driving piece and a throwing wheel driven by the throwing wheel driving piece, wherein the throwing wheel comprises a roller and a stirring tooth piece fixedly arranged on the outer wall of the roller, and the throwing wheel driving piece drives the roller to rotate so as to drive the stirring tooth piece to rotate, and the sludge material is smashed, thrown up and thrown to a material discharge hole; the material stirring tooth plates are provided with a plurality of material stirring tooth plates and are spirally distributed on the outer wall of the roller; the outer edge of the stirring tooth piece is zigzag.
2. The sludge aerobic fermentation system of claim 1, wherein: the feeding device comprises a shaftless screw conveyor, wherein the shaftless screw conveyor comprises shaftless screw blades and shaftless screw driving devices, the shaftless screw blades are obliquely arranged, and the shaftless screw driving devices drive the shaftless screw blades to obliquely convey sludge to the fermentation tank.
3. The sludge aerobic fermentation system of claim 2, wherein: the inner edge of the shaftless spiral blade is provided with a baffle plate, the baffle plate is arranged along the inner edge of the shaftless spiral blade and is fixed on the shaftless spiral blade, and the baffle plate is matched with the upper surface of the shaftless spiral blade to prevent sludge from being poured into the central inner hole of the shaftless spiral blade; the baffle plate is integrally formed and connected to the inner edge of the shaftless spiral blade and is arranged on one side of the shaftless spiral blade facing the material conveying direction;
The outer edge of the shaftless spiral blade is provided with a scraping plate, one side of the scraping plate is connected to the outer edge of the shaftless spiral blade, and the other side of the scraping plate scrapes materials towards the inner wall of the pipe shell; the scraping plate is arranged along the outer edge of the shaftless spiral blade; the scraping plate is an integrally formed inclined plane and is arranged at the outer edge of the shaftless spiral blade.
4. A sludge aerobic fermentation system as claimed in claim 1 or 3, wherein: the fermentation box is internally provided with a plurality of exhaust structures, and each exhaust structure comprises an exhaust cavity and a porous screen plate, wherein the exhaust cavity is arranged in the fermentation box in a penetrating way, and the porous screen plate is arranged on the periphery of the exhaust cavity.
5. A sludge aerobic fermentation system as claimed in claim 1 or 3, wherein: the scraper type material leveling mechanism is also arranged; the scraper type material leveling mechanism is arranged at the upper end in the fermentation box; the scraper type material flattening mechanism comprises a transmission chain and a chain wheel, wherein the transmission chain is provided with a scraper, the chain wheel drives the transmission chain to rotate, and the scraper is used for flattening materials; the sprocket is installed in the inside upper end of fermentation vat, and the drive chain link up and distribute in the fermentation vat.
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| CN111802259B (en) * | 2020-07-14 | 2022-03-22 | 农业农村部规划设计研究院 | System and method for processing fermentation padding of dairy farm excrement |
| CN113458115B (en) * | 2021-06-28 | 2023-01-06 | 江苏艾森利恩生物环保科技有限公司 | Efficient kitchen waste treatment method based on aerobic bacteria |
| CN114011162B (en) * | 2021-09-28 | 2023-03-17 | 河北邯峰发电有限责任公司 | Biomass coupling power generation system and device |
| CN113860926A (en) * | 2021-10-26 | 2021-12-31 | 河南牧原智能科技有限公司 | An animal manure fermentation tank |
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