CN116715353A - Anaerobic hydrolysis system and control method thereof - Google Patents
Anaerobic hydrolysis system and control method thereof Download PDFInfo
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- CN116715353A CN116715353A CN202310798093.6A CN202310798093A CN116715353A CN 116715353 A CN116715353 A CN 116715353A CN 202310798093 A CN202310798093 A CN 202310798093A CN 116715353 A CN116715353 A CN 116715353A
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- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 131
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 239000010806 kitchen waste Substances 0.000 claims abstract description 57
- 230000029087 digestion Effects 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 238000005507 spraying Methods 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000007790 solid phase Substances 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 239000000047 product Substances 0.000 claims description 30
- 239000007921 spray Substances 0.000 claims description 28
- 230000020477 pH reduction Effects 0.000 claims description 27
- 241000894006 Bacteria Species 0.000 claims description 24
- 230000003301 hydrolyzing effect Effects 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000000413 hydrolysate Substances 0.000 claims description 3
- 241000233866 Fungi Species 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 7
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 3
- 238000002386 leaching Methods 0.000 abstract description 3
- 239000012071 phase Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 6
- 238000000855 fermentation Methods 0.000 description 3
- 230000004151 fermentation Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 101000860173 Myxococcus xanthus C-factor Proteins 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an anaerobic hydrolysis system and a control method thereof, wherein the anaerobic hydrolysis system comprises a hydrolysis reactor, a turbulent mixer, a central stirrer, a circulating liquid flow device and a control system, wherein the control system is respectively connected with the hydrolysis reactor, the turbulent mixer, the central stirrer and the circulating liquid flow device through signals, and the control system respectively and correspondingly controls the hydrolysis reactor, the turbulent mixer, the central stirrer and the circulating liquid flow device according to a detection result of a product; the method has the advantages that the alkalinity, the strains and the temperature required by hydrolysis can be provided according to the requirements, the rapid mixing of kitchen waste and the strains is realized by adopting a turbulent mixer, the leaching hydrolysis of the kitchen waste is accelerated by feeding diversion and liquid phase hydrolysis liquid circulation spraying, the phase change efficiency of solid phase in the kitchen waste and the hydrolysis efficiency of the kitchen waste are improved, and the efficiency of preparing sewage treatment organic composite carbon source by the kitchen waste hydrolysis liquid is improved; meanwhile, through the backflow of the anaerobic digestion liquid, the cost and energy loss of preparing the organic composite carbon source from kitchen waste are obviously reduced.
Description
Technical Field
The invention relates to the technical field of sewage treatment and kitchen waste treatment, in particular to an anaerobic hydrolysis system and a control method thereof.
Background
At present, kitchen waste in China mainly adopts a pretreatment and anaerobic digestion treatment process, and the conventional process has the problems of complex pretreatment process, stable and poor process operation, high impurity content, low gas yield and the like because the pretreatment process is influenced by factors such as resident classification habit, source classification supervision, regional diet characteristics, seasonal products and the like, so that further research and exploration are needed for reducing the operation cost and improving the additional value approach of kitchen waste treatment products.
At present, the problem of insufficient carbon-nitrogen ratio of sewage in China generally exists, and the conventional denitrification process cannot meet the requirement of a denitrification section on a carbon source due to lower B/C in the sewage, so that a large amount of carbon source is required to be added to realize standard discharge of the sewage, and particularly high ammonia nitrogen wastewater, such as kitchen waste, wastewater after anaerobic kitchen waste, landfill leachate and the like, is solved. In the related patents of preparing sewage treatment carbon sources by utilizing kitchen wastes, the defects of low fermentation efficiency, long fermentation time, higher cost and the like exist, and the utilization and popularization of organic composite carbon sources prepared by kitchen wastes as commercial carbon sources are limited.
Meanwhile, the existing hydrolysis reaction process needs kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria to participate simultaneously, and solid phase impurities contained in the kitchen waste are easy to block a feeding pipeline, so that the effect on a final mixed product is easy to cause, the feeding time cannot be guaranteed, the real-time and effective feeding adjustment cannot be guaranteed, and in addition, the waste of the use of the hydrolysis liquid can be caused by the direct discharge or recycling of the hydrolysis liquid due to improper use.
Accordingly, there is a need to provide an anaerobic hydrolysis system and a control method thereof to solve the above-mentioned drawbacks and disadvantages of the prior art.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides an anaerobic hydrolysis system and a control method thereof.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an anaerobic hydrolysis system, characterized by: comprises a hydrolysis reactor, a turbulent mixer, a central stirrer, a circulating liquid flow device and a control system, wherein,
the turbulent mixer is arranged at the top of the hydrolysis reactor and is communicated with the interior of the hydrolysis reactor, and kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria enter the interior of the hydrolysis reactor through the turbulent mixer;
the central stirrer is arranged at the top position of the inner side of the hydrolysis reactor and is connected with an external power source;
the circulating liquid flow device is respectively arranged at the inlet end and the outlet end of the hydrolysis reactor;
the control system is respectively connected with the hydrolysis reactor, the turbulent mixer, the central mixer and the circulating liquid flow device in a signal way, and correspondingly controls the hydrolysis reactor, the turbulent mixer, the central mixer and the circulating liquid flow device according to the detection result of the product.
As a further preferable embodiment of the invention, the hydrolysis reactor comprises an upper shell and a lower shell which are communicated with each other, a screen is arranged at the inner communication position of the upper shell and the lower shell, a back flushing spray head is arranged at the lower end of the screen, the back flushing spray head is connected with a booster pump through an electromagnetic valve, and the electromagnetic valve and the booster pump are in signal connection with a control system.
As a further preferable embodiment of the invention, the upper shell is cylindrical, and a slag fixing outlet is formed in the bottom of the outer side of the upper shell.
As a further preferable embodiment of the present invention, the lower housing is provided with a conical shape, a circulating liquid outlet is provided at the bottom of the outer side of the lower housing, and a carbon source outlet is provided at the bottom end of the lower housing.
As a further preferable embodiment of the invention, the turbulent mixer comprises a mixing shell, a plurality of groups of spiral group sheets are arranged in the mixing shell, a kitchen waste feeding port is formed in the outer end of the mixing shell, an anaerobic digestion liquid feeding port and a hydrolytic acidification bacteria supplementing port are respectively formed in the top of the mixing shell, and a feeding guide port extending along the inner wall of the hydrolysis reactor is further arranged in the connecting position of the mixing shell and the hydrolysis reactor.
As a further preferable embodiment of the invention, the spiral set of slices comprises 6 sets of spiral slices which are sequentially connected end to end, the kitchen waste feeding port is arranged on the outer side of the first spiral slice, the anaerobic digestion liquid feeding port is arranged on the top of the first spiral slice, the hydrolytic acidification bacteria supplementing port is arranged on the top of the third spiral slice, and the control system can respectively and correspondingly control the 6 sets of spiral slices.
As a further preferred embodiment of the present invention, when the concentration in the detected result of the product is higher than the preset concentration threshold, the control system first controls to increase the rotation speed of the fifth spiral slice and the sixth spiral slice, and controls the rotation speed increase of the fifth spiral slice to be higher than the rotation speed increase of the sixth spiral slice; when the concentration in the detection result is still higher than the concentration preset threshold after the preset time, the control system controls the rotation speed of the first spiral sheet and the rotation speed of the second spiral sheet to be increased, and controls the rotation speed of the first spiral sheet to be increased lower than the rotation speed of the second spiral sheet;
when the concentration in the detection result of the product is lower than a concentration preset threshold value, the control system firstly controls to reduce the rotating speed of the fifth spiral sheet and the sixth spiral sheet, and controls the rotating speed of the fifth spiral sheet to be lower than the rotating speed of the sixth spiral sheet; when the concentration in the detection result is still lower than the concentration preset threshold after the preset time, the control system controls the rotation speed of the first spiral sheet and the rotation speed of the second spiral sheet to be reduced, and controls the rotation speed of the first spiral sheet to be reduced to be lower than the rotation speed of the second spiral sheet to be reduced;
when the alkalinity in the detection result of the product is higher than the alkalinity preset threshold value, the control system firstly controls to increase the rotation speed of the fifth spiral sheet and the rotation speed of the sixth spiral sheet, and controls the rotation speed increase of the fifth spiral sheet to be higher than the rotation speed increase of the sixth spiral sheet; when the alkalinity in the detection result is still higher than the alkalinity preset threshold after the preset time passes, the control system controls the rotation speed of the third spiral sheet and the rotation speed of the fourth spiral sheet to be increased, and controls the rotation speed of the third spiral sheet to be increased higher than the rotation speed of the fourth spiral sheet;
when the alkalinity in the detection result of the product is lower than the alkalinity preset threshold value, the control system firstly controls to reduce the rotating speed of the fifth spiral sheet and the sixth spiral sheet, and controls the rotating speed of the fifth spiral sheet to be lower than the rotating speed of the sixth spiral sheet; when the alkalinity in the detection result is still lower than the alkalinity preset threshold value after the preset time passes, the control system controls the rotation speed of the third spiral slice and the rotation speed of the fourth spiral slice to be reduced, and controls the rotation speed of the third spiral slice to be reduced to be lower than the rotation speed of the fourth spiral slice to be reduced.
As a further preferred embodiment of the present invention, the central agitator comprises an agitating shaft and agitating blades, one end of the agitating shaft extends out of the hydrolysis reactor and is connected to an output shaft of an external power source, and the other end of the agitating shaft extends into the hydrolysis reactor and is connected to the agitating blades.
As a further preferred embodiment of the present invention, the circulating liquid flow device includes a circulating controller and a circulating spray port, the circulating spray port extends into the hydrolysis reactor from the top, one end of the circulating controller is connected with the circulating liquid outlet, the other end is connected with the circulating spray port, and the circulating controller is further connected with the control system in a signal manner to correspondingly control the circulating spray port according to the instruction of the control system.
Further, the invention also provides a control method of the anaerobic hydrolysis system, which is characterized in that: the method comprises the following steps:
1) Kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria are sent into the hydrolysis reactor through a turbulent mixer;
2) The central stirrer fully stirs the mixture in the hydrolysis reactor and realizes solid-liquid separation through a screen;
3) Solid-phase products of the kitchen waste are discharged periodically through a solid residue outlet;
4) The liquid phase hydrolysate of the kitchen waste circularly enters the hydrolysis reactor through a circulating liquid flow device;
5) After COD and pH value in the hydrolysis reactor reach preset values, automatic discharging is realized through a carbon source outlet;
6) And the control system respectively and correspondingly controls the hydrolysis reactor, the turbulent mixer, the central stirrer and the circulating liquid flow device according to the detection result of the product.
Compared with the prior art, the invention has the following beneficial effects:
1) The invention provides an anaerobic hydrolysis system and a control method thereof, which can provide alkalinity, strains and temperature required by hydrolysis according to requirements through the cooperative use of a turbulent mixer, a central stirrer and a circulating liquid flow device, realize the rapid mixing of kitchen waste and strains by adopting the turbulent mixer, accelerate leaching hydrolysis of kitchen waste through feed diversion and liquid phase hydrolysis liquid circulation spraying, improve the phase change efficiency of solid phase in kitchen waste and the hydrolysis efficiency of kitchen waste, and improve the efficiency of preparing sewage treatment organic composite carbon source by the kitchen waste hydrolysis liquid; meanwhile, through the backflow of the anaerobic digestion liquid, the cost and energy loss of preparing the organic composite carbon source from kitchen waste are obviously reduced.
2) The invention provides an anaerobic hydrolysis system and a control method thereof, wherein the corresponding control is carried out on each group of spiral slices in the spiral slice, so that smooth feeding of kitchen waste is realized, and meanwhile, the corresponding control of a turbulent mixer is carried out preferentially, so that the influence on products, which is possibly generated by directly controlling the feeding amounts of the kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria, is avoided.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is an enlarged view of the structure of the turbulent mixer of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 shows an anaerobic hydrolysis system according to this embodiment, comprising a hydrolysis reactor 1, a turbulent mixer 2, a central mixer 3, a circulating fluid stream device 4 and a control system C, wherein,
the turbulent mixer 2 is arranged at the top of the hydrolysis reactor 1 and is communicated with the interior of the hydrolysis reactor 1, and kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria enter the hydrolysis reactor 1 through the turbulent mixer 2;
the central stirrer 3 is arranged at the top position of the inner side of the hydrolysis reactor 1, and the central stirrer 3 is connected with an external power source;
the circulating liquid flow device 4 is respectively arranged at the inlet end and the outlet end of the hydrolysis reactor 1;
the control system C is respectively connected with the hydrolysis reactor 1, the turbulent mixer 2, the central stirrer 3 and the circulating liquid flow device 4 in a signal way, and correspondingly controls the hydrolysis reactor 1, the turbulent mixer 2, the central stirrer 3 and the circulating liquid flow device 4 according to the detection result of the product.
As shown in FIG. 1, the hydrolysis reactor 1 in this embodiment is an anaerobic digestion tank, comprising an upper shell 11 and a lower shell 12 which are mutually communicated, wherein a screen 5 is arranged at the inner communication position of the upper shell 11 and the lower shell 12, the screen 5 is used for solid-liquid separation of kitchen waste fermentation liquor, the thickness of the screen in this embodiment is 5mm, the aperture of the screen is 0.8-1 mm, solid phase hydrolysis of kitchen waste is subjected to phase change through a screen orifice plate for solid-liquid separation through continuous leaching of the anaerobic digestion liquor and acidification hydrolysis of hydrolysis acidification bacteria, large particle solid phase is reserved at the top of the screen 5, and the hydrolyzed liquid phase flows into the lower shell 12 through the screen 5.
In the embodiment, the lower extreme of screen cloth 5 is provided with back flush shower nozzle, and back flush shower nozzle passes through solenoid valve connection booster pump, solenoid valve and booster pump and control system C signal connection, after the hydrolysis is accomplished, can control booster pump start and solenoid valve closure through control system C, and booster pump output power drives back flush shower nozzle and realizes the reverse washing to screen cloth 5.
Preferably, the upper housing 11 in the present embodiment is provided in a cylindrical shape, and a slag fixing outlet 111 is opened at the bottom of the outer side of the upper housing 11; the lower casing 12 is provided with a conical shape, a circulating liquid outlet 121 is formed in the bottom of the outer side of the lower casing 12, and a carbon source outlet 122 is formed in the bottom end of the lower casing 12. After solid-liquid separation, lignin, cellulose and the like which are not easy to hydrolyze are periodically discharged through a solid slag outlet 111 and then enter an anaerobic digestion system to further generate biogas, anaerobic digestion liquid entering the lower shell 12 through a screen 5 can enter a circulating liquid flow device 4 through a circulating liquid outlet 121 to realize cyclic utilization, a COD on-line detector and a pH detector are arranged in the hydrolysis reactor 1, the on-line detection of organic composite carbon source COD and the pH real-time detection of mixed liquid are realized, and when the COD and the pH value in the hydrolysis reactor 1 reach preset values, automatic discharging can be realized under the drive of a discharging pump through a carbon source outlet.
In the embodiment, the reaction temperature in the hydrolysis reactor 1 is controlled at 55+/-1 ℃, the pH is controlled at 5.0-6.0, the organic load is controlled at 15-20 kg TVS/(m.d), the Hydraulic Retention Time (HRT) is controlled at 2-3 d, and the yield of the hydrolyzed VFA is 0.30-0.35 kg CODVFA/kg CODfed.
Preferably, a liquid level meter and a temperature sensor are also arranged inside the hydrolysis reactor 1, so that the real-time detection of the liquid level and the temperature of the hydrolysis reaction mixed liquid is realized.
As shown in fig. 1-2, in this embodiment, the turbulent mixer 2 includes a mixing housing 21, a plurality of groups of spiral pieces 22 are disposed in the mixing housing, a kitchen waste feed port 23 is disposed at an outer end of the mixing housing 21, an anaerobic digestion liquid feed port 24 and a hydrolytic acidification bacteria supplement port 25 are disposed at a top of the mixing housing 21, the plurality of groups of spiral pieces 22 facilitate conveying kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria to the hydrolysis reactor 1 through spiral cutting and rotary conveying, a feed guide port 26 extending along an inner wall of the hydrolysis reactor 1 is disposed in a connection position between the mixing housing 21 and the hydrolysis reactor 1, and the kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria can enter the hydrolysis reactor 1 through the feed guide port 26 after being mixed in the turbulent mixer 2.
As shown in fig. 2, the spiral set 22 in this embodiment includes 6 sets of spiral slices sequentially connected end to end, the kitchen waste feed port 23 is disposed at the outer side of the first spiral slice 221, the anaerobic digestion liquid feed port 24 is disposed at the top of the first spiral slice 221, the first spiral slice 221 and the second spiral slice 222 are used for feeding kitchen waste and anaerobic digestion liquid into the hydrolysis reactor 1, the hydrolytic acidification supplementing port 25 is disposed at the top of the third spiral slice 223, the third spiral slice 223 and the fourth spiral slice 224 are used for feeding hydrolytic acidification bacteria, kitchen waste and anaerobic digestion liquid at the front end into the hydrolysis reactor 1, and the fifth spiral slice 225 and the sixth spiral slice 226 are used for mixing kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria fed from the front side spiral slice and feeding the mixture into the hydrolysis reactor 1.
In the embodiment, the length of the turbulent mixer 2 is set to be 1-2m, and the proportion of the anaerobic digestion liquid fed into the hydrolysis reactor 1 through the turbulent mixer 2 accounts for 50% -70% of the mass of kitchen waste.
The control system can respectively and correspondingly control 6 groups of spiral slices, and the concrete expression is as follows:
when the concentration in the detection result of the product is higher than the preset concentration threshold, the control system firstly controls to increase the rotation speed of the fifth spiral slice 225 and the sixth spiral slice 226 so as to send the anaerobic digestion liquid and hydrolytic acidification bacteria remained in the turbulent mixer 2 into the hydrolysis reactor 1 as soon as possible to promote the hydrolysis reaction, and controls the rotation speed of the fifth spiral slice 225 to be higher than the rotation speed of the sixth spiral slice 226 so as to keep the higher rotation speed of the fifth spiral slice 225 to facilitate the spiral conveying of kitchen waste which is conveyed from the front end and is not completely refined yet; when the concentration in the detection result is still higher than the concentration preset threshold after the preset time, the anaerobic digestion liquid needs to be supplemented into the hydrolysis reactor 1, the control system controls the rotation speed of the first spiral piece 221 and the second spiral piece 222 to be increased so as to be convenient for sending the anaerobic digestion liquid into the hydrolysis reactor 1, and controls the rotation speed of the first spiral piece 221 to be increased lower than the rotation speed of the second spiral piece 222, and the rotation speed of the first spiral piece 221 needs to be increased lower than the rotation speed of the second spiral piece 222 because only the anaerobic digestion liquid is supplemented to avoid excessively increasing the feeding amount of kitchen waste as much as possible;
when the concentration in the detection result of the product is lower than the preset concentration threshold, the control system firstly controls to reduce the rotating speeds of the fifth spiral piece 225 and the sixth spiral piece 226 so as to reduce the speed of the residual anaerobic digestion liquid and hydrolytic acidification bacteria in the turbulent mixer 2 to be sent into the hydrolysis reactor 1, thereby slowing down the hydrolysis reaction, and controls the rotating speed of the fifth spiral piece 225 to be slower than the rotating speed of the sixth spiral piece 226 so as to keep the higher rotating speed of the fifth spiral piece 225 and facilitate the spiral conveying of the kitchen waste which is conveyed from the front end and is not completely refined yet; when the concentration in the detection result is still lower than the concentration preset threshold after the preset time passes, the control system controls the rotation speed of the first spiral piece 221 and the rotation speed of the second spiral piece 222 to be reduced, and controls the rotation speed of the first spiral piece 221 to be reduced to be lower than the rotation speed of the second spiral piece 222 to be reduced; at this time, the anaerobic digestion liquid does not need to be added, so that the first spiral piece 221 and the second spiral piece 222 are only used for feeding kitchen waste, and the rotational speed of the first spiral piece 221 needs to be increased lower than that of the second spiral piece 222 so as to keep the higher rotational speed of the first spiral piece 221 to realize spiral feeding of the kitchen waste;
when the alkalinity in the detection result of the product is higher than the alkalinity preset threshold value, the control system firstly controls to increase the rotation speed of the fifth spiral slice 225 and the sixth spiral slice 226 so as to send the anaerobic digestion liquid and hydrolytic acidification bacteria remained in the turbulent mixer 2 into the hydrolysis reactor 1 as soon as possible to promote the hydrolysis reaction, and controls the rotation speed of the fifth spiral slice 225 to be higher than the rotation speed of the sixth spiral slice 226 so as to keep the higher rotation speed of the fifth spiral slice 225 to facilitate the spiral conveying of kitchen waste which is conveyed from the front end and is not completely refined yet; when the alkalinity in the detection result is still higher than the alkalinity preset threshold after the preset time passes, the hydrolysis acidification bacteria are needed to be supplemented into the hydrolysis reactor 1, the control system controls the rotation speed of the third spiral piece 223 and the fourth spiral piece 224 to be increased again, and controls the rotation speed of the third spiral piece 223 to be increased higher than the rotation speed of the fourth spiral piece 224 so as to facilitate the spiral conveying of the hydrolysis acidification bacteria fed from the top position of the third spiral piece 223;
when the alkalinity in the detection result of the product is lower than the alkalinity preset threshold value, the control system firstly controls to reduce the rotating speed of the fifth spiral slice 225 and the sixth spiral slice 226 so as to reduce the speed of the residual anaerobic digestion liquid and hydrolytic acidification bacteria in the turbulent mixer 2 to be sent into the hydrolysis reactor 1, thereby slowing down the hydrolysis reaction, and controls the rotating speed of the fifth spiral slice 225 to be slower than the rotating speed of the sixth spiral slice 226; when the alkalinity in the detection result is still lower than the alkalinity preset threshold after the preset time, the control system controls the rotation speed of the third spiral slice 223 and the fourth spiral slice 224 to be reduced again, and the hydrolytic acidification bacteria do not need to be added at the moment, so that the third spiral slice 223 and the fourth spiral slice 224 are only used for feeding kitchen waste, and the rotation speed of the third spiral slice 223 needs to be controlled to be reduced lower than the rotation speed of the fourth spiral slice 224 so as to keep the higher rotation speed of the third spiral slice 223 to realize spiral feeding of kitchen waste.
As shown in fig. 1, the central agitator 3 in this embodiment includes an agitating shaft 31 and an agitating blade 32, one end of the agitating shaft 31 extends out of the hydrolysis reactor 1 and is connected to an output shaft of an external power source 30, the other end of the agitating shaft 31 extends into the hydrolysis reactor 1 and is connected to the agitating blade 32, the external power source 30 is preferably a driving motor, and the output power of the output shaft of the driving motor drives the agitating shaft 31 to drive the agitating blade 32 thereon to rotate synchronously, so as to agitate the mixed liquid in the hydrolysis reactor 1. The control system C can control and adjust the output power of the external power source 30 according to the detection result of the product so as to realize corresponding adjustment of the stirring rotation speed.
As shown in fig. 1, in the present embodiment, the circulating liquid flow device 4 includes a circulating controller C1 and a circulating spray port 4, the circulating spray port 4 extends into the hydrolysis reactor 1 from the top, one end of the circulating controller C1 is connected to the circulating liquid outlet 121, and the other end is connected to the circulating spray port 4, so that anaerobic digestion liquid in the hydrolysis reactor 1 is sent to the circulating spray port 4 through the circulating liquid outlet 121, and then sprayed into the hydrolysis reactor 1 through the circulating spray port 4.
The circulation controller C1 in this embodiment is further connected with the control system C by a signal to correspondingly control the circulation spraying port 4 according to the instruction of the control system C, and the control manner in which the circulation controller C1 can correspondingly control the circulation spraying port 4 according to the instruction of the control system C at least includes: start-stop adjustment of the circulating spray port 4, angle adjustment of the circulating spray port 4, flow and flow speed adjustment of the circulating spray port 4, spray range adjustment of the circulating spray port 4 and the like.
In this embodiment, the circulation ratio of the digestive juice is preferably controlled to be 0.5 to 0.7.
Parameters of the circulation spray port 4 can be correspondingly adjusted according to the detection result of hydrolysis reaction products, for example:
when the concentration in the detection result of the product is higher than a concentration preset threshold value, the control system C sends a corresponding control instruction to the circulation controller C1 so as to control the increase of the spraying flow of the circulation spraying port 4, or control the increase of the spraying range of the circulation spraying port 4, or control the increase of the spraying angle of the circulation spraying port 4; thereby fully promoting the recycling of the anaerobic digestion liquid and properly reducing the concentration in the detection result of the product in a way of promoting the hydrolysis reaction;
when the concentration in the detection result of the product is lower than a concentration preset threshold value, the control system C sends a corresponding control instruction to the circulation controller C1 so as to control the reduction of the spraying flow of the circulation spraying port 4, or control the reduction of the spraying range of the circulation spraying port 4, or control the reduction of the spraying angle of the circulation spraying port 4; thereby properly reducing the recycling of the anaerobic digestion liquid and properly improving the concentration in the detection result of the product in a mode of slowly carrying out hydrolysis reaction;
in this embodiment, the priority of each adjustment mode is set as follows: spray flow adjustment > spray range adjustment > spray angle adjustment;
the spray flow regulation mode has small operation action on the circulating spray port 4 and rapid feedback, so that the priority of spray flow regulation is set to be the highest; on the one hand, the spray angle adjusting mode has larger action and has possibility of collision damage with kitchen waste newly entering the hydrolysis reactor 1, so that the priority of spray flow adjustment is set to be the lowest, and the adjustment priority of spray range adjustment is in between.
Second embodiment
The invention also provides a second embodiment, which provides a control method of an anaerobic hydrolysis system, comprising the following steps:
1) Kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria are sent into the hydrolysis reactor through a turbulent mixer;
2) The central stirrer fully stirs the mixture in the hydrolysis reactor and realizes solid-liquid separation through a screen;
3) Solid-phase products of the kitchen waste are discharged periodically through a solid residue outlet;
4) The liquid phase hydrolysate of the kitchen waste circularly enters the hydrolysis reactor through a circulating liquid flow device;
5) After COD and pH value in the hydrolysis reactor reach preset values, automatic discharging is realized through a carbon source outlet;
6) And the control system respectively and correspondingly controls the hydrolysis reactor, the turbulent mixer, the central stirrer and the circulating liquid flow device according to the detection result of the product.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and the scope of the invention is also defined by the appended claims.
Claims (10)
1. An anaerobic hydrolysis system, characterized by: comprises a hydrolysis reactor (1), a turbulent mixer (2), a central stirrer (3), a circulating liquid flow device (4) and a control system (C), wherein,
the turbulent mixer (2) is arranged at the top of the hydrolysis reactor (1) and is communicated with the interior of the hydrolysis reactor (1), and kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria enter the interior of the hydrolysis reactor (1) through the turbulent mixer (2);
the central stirrer (3) is arranged at the top position of the inner side of the hydrolysis reactor (1), and the central stirrer (3) is connected with an external power source;
the circulating liquid flow device (4) is respectively arranged at the inlet end and the outlet end of the hydrolysis reactor (1);
the control system (C) is respectively in signal connection with the hydrolysis reactor (1), the turbulent mixer (2), the central stirrer (3) and the circulating liquid flow device (4), and the control system (C) respectively and correspondingly controls the hydrolysis reactor (1), the turbulent mixer (2), the central stirrer (3) and the circulating liquid flow device (4) according to a detection result of a product.
2. An anaerobic hydrolysis system according to claim 1, wherein: the hydrolysis reactor (1) comprises an upper shell (11) and a lower shell (12) which are communicated with each other, a screen (5) is arranged at the inner communication position of the upper shell (11) and the lower shell (12), a back flushing spray nozzle is arranged at the lower end of the screen (5), the back flushing spray nozzle is connected with a booster pump through an electromagnetic valve, and the electromagnetic valve and the booster pump are in signal connection with a control system (C).
3. An anaerobic hydrolysis system according to claim 2, wherein: the upper shell (11) is cylindrical, and a slag fixing outlet (111) is formed in the bottom of the outer side of the upper shell (11).
4. An anaerobic hydrolysis system according to claim 2, wherein: the lower shell (12) is conical, a circulating liquid outlet (121) is formed in the bottom of the outer side of the lower shell (12), and a carbon source outlet (122) is formed in the bottom end of the lower shell (12).
5. An anaerobic hydrolysis system according to claim 1, wherein: turbulent mixer (2) are including mixing casing (21) the inside of mixing casing is provided with multiunit spiral group piece (22) the kitchen garbage feed inlet (23) have been seted up to the outer end of mixing casing (21) anaerobic digestion liquid feed inlet (24) and hydrolytic acidification fungus make-up mouth (25) have been seted up respectively at the top of mixing casing (21) are provided with feed guide mouth (26) that extend along hydrolysis reactor (1) inner wall inside the hookup location of hydrolysis reactor (1) inside.
6. An anaerobic hydrolysis system according to claim 5, wherein: the spiral group piece (22) comprises 6 groups of spiral pieces which are sequentially connected end to end, the kitchen waste feeding port (23) is formed in the outer side of the first spiral piece (221), the anaerobic digestion liquid feeding port (24) is formed in the top of the first spiral piece (221), the hydrolytic acidification bacteria supplementing port (25) is formed in the top of the third spiral piece (223), and the control system can respectively and correspondingly control the 6 groups of spiral pieces.
7. An anaerobic hydrolysis system according to claim 6, wherein:
when the concentration in the detection result of the product is higher than a concentration preset threshold value, the control system firstly controls to increase the rotation speed of the fifth spiral sheet (225) and the sixth spiral sheet (226), and controls the rotation speed of the fifth spiral sheet (225) to be higher than the rotation speed of the sixth spiral sheet (226); when the concentration in the detection result is still higher than the concentration preset threshold after the preset time passes, the control system controls the rotation speed of the first spiral piece (221) and the rotation speed of the second spiral piece (222) to be increased, and controls the rotation speed of the first spiral piece (221) to be increased lower than the rotation speed of the second spiral piece (222) to be increased;
when the concentration in the detection result of the product is lower than a concentration preset threshold value, the control system firstly controls to reduce the rotating speed of the fifth spiral sheet (225) and the sixth spiral sheet (226), and controls the rotating speed of the fifth spiral sheet (225) to be reduced lower than the rotating speed of the sixth spiral sheet (226); when the concentration in the detection result is still lower than the concentration preset threshold after the preset time, the control system controls the rotation speed of the first spiral piece (221) and the rotation speed of the second spiral piece (222) to be reduced, and controls the rotation speed of the first spiral piece (221) to be reduced to be lower than the rotation speed of the second spiral piece (222) to be reduced;
when the alkalinity in the detection result of the product is higher than the alkalinity preset threshold value, the control system firstly controls to increase the rotation speed of the fifth spiral sheet (225) and the rotation speed of the sixth spiral sheet (226), and controls the rotation speed of the fifth spiral sheet (225) to be higher than the rotation speed of the sixth spiral sheet (226); when the alkalinity in the detection result is still higher than the alkalinity preset threshold value after the preset time passes, the control system controls the rotation speed of the third spiral sheet (223) and the rotation speed of the fourth spiral sheet (224) to be increased, and controls the rotation speed of the third spiral sheet (223) to be increased higher than the rotation speed of the fourth spiral sheet (224);
when the alkalinity in the detection result of the product is lower than the alkalinity preset threshold value, the control system firstly controls to reduce the rotating speed of the fifth spiral sheet (225) and the sixth spiral sheet (226), and controls the rotating speed of the fifth spiral sheet (225) to be reduced lower than the rotating speed of the sixth spiral sheet (226); when the alkalinity in the detection result is still lower than the alkalinity preset threshold value after the preset time passes, the control system controls the rotation speed of the third spiral piece (223) and the rotation speed of the fourth spiral piece (224) to be reduced, and controls the rotation speed of the third spiral piece (223) to be reduced to be lower than the rotation speed of the fourth spiral piece (224) to be reduced.
8. An anaerobic hydrolysis system according to claim 1, wherein: the central stirrer (3) comprises a stirring shaft (31) and stirring blades (32), one end of the stirring shaft (31) extends out of the hydrolysis reactor (1) and is connected with an output shaft of an external power source (30), and the other end of the stirring shaft (31) extends into the hydrolysis reactor (1) and is connected with the stirring blades (32).
9. An anaerobic hydrolysis system according to claim 4, wherein: the circulating liquid flow device (4) comprises a circulating controller (C1) and a circulating spraying port (4), the circulating spraying port (4) stretches into the hydrolysis reactor (1) from the top, one end of the circulating controller (C1) is connected with a circulating liquid outlet (121), the other end of the circulating controller is connected with the circulating spraying port (4), and the circulating controller (C1) is further connected with a control system (C) through signals so as to correspondingly control the circulating spraying port (4) according to instructions of the control system (C).
10. A control method of an anaerobic hydrolysis system according to any one of claims 1 to 9, wherein: the method comprises the following steps:
1) Kitchen waste, anaerobic digestion liquid and hydrolytic acidification bacteria are sent into the hydrolysis reactor through a turbulent mixer;
2) The central stirrer fully stirs the mixture in the hydrolysis reactor and realizes solid-liquid separation through a screen;
3) Solid-phase products of the kitchen waste are discharged periodically through a solid residue outlet;
4) The liquid phase hydrolysate of the kitchen waste circularly enters the hydrolysis reactor through a circulating liquid flow device;
5) After COD and pH value in the hydrolysis reactor reach preset values, automatic discharging is realized through a carbon source outlet;
6) And the control system respectively and correspondingly controls the hydrolysis reactor, the turbulent mixer, the central stirrer and the circulating liquid flow device according to the detection result of the product.
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| CN118164556A (en) * | 2024-03-28 | 2024-06-11 | 上海艺迈实业有限公司 | Carbon source preparation facilities with concentration detection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118164556A (en) * | 2024-03-28 | 2024-06-11 | 上海艺迈实业有限公司 | Carbon source preparation facilities with concentration detection function |
| CN118164556B (en) * | 2024-03-28 | 2024-08-20 | 上海艺迈实业有限公司 | Carbon source preparation facilities with concentration detection function |
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