CN108217933A - Cycle mixing arrangement in a kind of efficient two-phase anaerobic digestion device for promoting production acid - Google Patents
Cycle mixing arrangement in a kind of efficient two-phase anaerobic digestion device for promoting production acid Download PDFInfo
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- CN108217933A CN108217933A CN201810085716.4A CN201810085716A CN108217933A CN 108217933 A CN108217933 A CN 108217933A CN 201810085716 A CN201810085716 A CN 201810085716A CN 108217933 A CN108217933 A CN 108217933A
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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
- C02F3/286—Anaerobic digestion processes including two or more steps
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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
- C02F3/2866—Particular arrangements for anaerobic reactors
Abstract
The invention provides cycle mixing arrangement in a kind of efficient two-phase anaerobic digestion device for promoting production acid, including the sour digester of production, methane phase digester, is connected between the production acid digester and methane phase digester by recycling water conservancy pipeline；The sour feed system of production and at least one set of production acid circulation system are provided on the sour digester of the production, the sour feed system of the production includes the sour feed pump of production and the production acid feeding pipe of at least level-one, the production acid feed pump is connected with the sour feeding pipe of production, and the sour feeding pipe of the production enters in the production acid digester.The multistage feed system of cycle mixing arrangement can increase the time of contact of the sour phase microorganism of production and material in the efficient two-phase anaerobic digestion device for promoting production acid described in the invention, improve product acid activity, increase material degradation efficiency.
Description
Technical field
The invention belongs to sewage treatment field, more particularly, to a kind of efficient two-phase anaerobic digestion device for promoting production acid
Interior cycle mixing arrangement.
Background technology
At present, compared with homogenous anaerobic digestion techniques, two-phase anaerobic reactor has fully considered acid-producing bacteria and production first because of it
The different physiological metabolism characteristic of alkane bacterium, the advantage in terms of high debirs and waste water are handled become apparent.Among these, sour phase is produced
Treatment efficiency depends on the mixing uniformity between material and sludge, therefore, suitable agitating mode is taken to remain anti-
It is the key that obtain good processing fermentation productivity to answer in device that microorganism and fermentate fully interact.Especially handle Gao Gu
During waste, the lighter scum silica frost of some proportions often forms crust layer due to the interaction with microorganism, gently then reduces digestion
Device Operating ettectiveness, it is heavy then even reactor can be caused to burst.Therefore, certain measure need to be taken to carry out skin breaking in time.At present
Stirring is most commonly seen broken shell technology, can be divided mainly into two class of mechanical agitation and hydraulic mixing.Wherein, for mechanical agitation,
Since agitating device must be placed in inside digestion reactor, once corroded by acidic fermentation products, safeguard replace difficulty it is larger,
It is not easy to operation and maintenance.Also, its high shear force provided may damage microbial cell and sludge flco.And
Hydraulic mixing mode is because main equipment is all placed in outside digester, and not only operation and maintenance are more convenient, energy consumption and Original equipment
Investment is also lower.However, conventional hydraulic agitating mode is difficult often to provide enough stirring powers, mass-transfer efficiency is not generally high,
It increases digester stagnant wake, reduce reactor dischargeable capacity.
And for follow-up methanogenic phase, because in initial operating stage, production alkane phase often based on floc sludge, maintains certain ratio
The water outlet cycle of example can be such that muddy water fully mixes, be conducive to the formation of granule sludge, increase sludge ownership, therefore in operation just
Phase generally requires to maintain comparable effluent recycling.However, the top effluent recycling more often used at present extremely produces alkane digester bottom
Mode enough hybrid powers can not be often provided, sludge blanket generally exists only in digester middle and lower part, cause material with it is micro-
Biology mixing mixing is uneven, and the volumetric loading of sludge blanket is extremely low, and then reactor start-up is caused to fail.
Invention content
In view of this, the invention is directed to cycle mixing in a kind of efficient two-phase anaerobic digestion device for promoting production acid
Device, solving production acid in existing diphasic anaerobic technology, phase hydraulic mixing is short of power, velocity field is unevenly distributed, it is tight to crust
Weight, fermentation and acid performance be not high and produces the defects of alkane phase bottom reflux hybrid power is insufficient.
In order to achieve the above objectives, the technical solution of the invention is realized in：
Cycle mixing arrangement in a kind of efficient two-phase anaerobic digestion device for promoting production acid, including the sour digester of production, methane phase
Digester is connected between the production acid digester and methane phase digester by recycling water conservancy pipeline；
The sour feed system of production and at least one set of production acid circulation system, the production are provided on the sour digester of the production
Sour feed system includes the sour feed pump of production and the production acid feeding pipe of at least level-one, the production acid feed pump and the sour feed pipe of production
Road is connected, and the sour feeding pipe of the production enters in the production acid digester, and production is provided on the production acid feeding pipe
Sour material inlet valve, the production acid circulation system include production acid circulating pump and the production acid circulation line of at least level-one, the production
Acid circulating pump is connected with the production acid circulation line, and the sour circulation line of the production enters in the production acid digester, institute
The sour circulation valve of production is provided on the production acid circulation line stated.
Further, methane phase feed system is provided on the methane phase digester to recycle at least one set of methane phase
System, the cycle water conservancy pipeline are connected with the methane phase feed system, and the methane phase feed system includes production
Methane feed is pumped to be connected with methane phase feeding pipe, the methane phase feed pump with methane phase feeding pipe, the production first
Alkane feeding pipe enters in the methane phase digester, and methane phase inlet valve is provided on the methane phase feeding pipe
Door, the methane phase circulatory system include methane phase circulating pump and the methane phase circulation line of at least level-one, the production first
Alkane circulating pump is connected with the methane phase circulation line, and the methane phase circulation line enters the methane phase digester
In, it is provided with methane phase circulation valve on the methane phase circulation line.
Further, the side of the production acid circulating pump is provided with production acid cycle inlet valve；The methane phase cycle
The side of pump is provided with methane phase cycle inlet valve.
Further, the sour phase flowing water Valve of production is provided on the cycle water conservancy pipeline.
Further, during the diameter d ＜ 10m of the sour digester of the production, unilateral side is provided on the sour digester of the production
It produces acid circulation system, during diameter 10m≤d≤20m of the described sour digester of production, is provided on the production acid digester symmetrical
Bilateral production acid circulation system, during the diameter d ＞ 20m of the described sour digester of production, be provided on the production acid digester
Equally distributed 3 groups or more of production acid circulation system.
Further, during the blade diameter length ratio l ＞ 1.5 of the sour digester of the production, two level is provided on the production acid digester
During 0.5≤l of blade diameter length ratio of the sour digester of the production≤1.5, three are provided on the production acid digester for production sour circulation line
During the blade diameter length ratio l ＜ 0.5 of the sour digester of the production, level Four is provided on the production acid digester for grade production sour circulation line
The above sour circulation line of production.
Further, when solid content is less than 3% in material, the sour digester of the production is using the charging of the production acid of level-one or two level
Pipeline is fed；When solid content is more than or equal to 3% in material, the production acid digester uses top feed mode.
The sour feeding pipe of level-one production enters the sour digester of production from bottom, and the sour feeding pipe of two level production enters production at the top of liquid layer
Sour digester sets valve among pipeline respectively.And can three-level, level Four etc. be set more according to the height of the sour digester of production respectively
The sour feeding pipe of multistage production.The sour circulation line of production is pumped into mixed fermentation liquid, the sour circulation line of level-one production in the middle part of the sour digester of production
Stretch into the sour digester of production from bottom, centre add can independent control valve, the sour circulation line of two level production stretches into production at the top of liquid layer
Sour digester, centre adds can independent control valve.It equally can be according to digester height, material solid content, volumetric loading, sludge
And the actual conditions such as material distribution situation add the sour circulation line of the more stages such as three-level, level Four production.
Further, during the diameter d ＜ 8m of the methane phase digester, unilateral side is provided on the methane phase digester
The methane phase circulatory system, during diameter 8m≤d≤15m of the methane phase digester, set on the methane phase digester
It is equipped with the methane phase circulatory system of symmetrical bilateral, during the diameter d ＞ 15m of the methane phase digester, the methane phase
Equally distributed 3 groups or more of the methane phase circulatory system is provided on digester.
Further, it during the blade diameter length ratio l ＞ 1.4 of the methane phase digester, is provided on the methane phase digester
Two level methane phase circulation line, during 0.4≤l of blade diameter length ratio of the methane phase digester≤1.4, the methane phase digester
On be provided with three-level methane phase circulation line, during the blade diameter length ratio l ＜ 0.4 of the methane phase digester, the methane phase disappears
Change and be provided with level Four more than methane phase circulation line on device.
Methane phase circulation line is pumped into mixed fermentation liquid in the middle part of the methane phase digester, and level-one methane phase circulation line is the bottom of from
Portion stretches into methane phase digester, centre add can independent control valve, two level methane phase circulation line stretches into production at the top of liquid layer
Methane digester, centre adds can independent control valve.It equally can be according to digester height, material solid content, volumetric loading etc.
Actual conditions add the more stages methane phase circulation line such as three-level, level Four.
Because of methane phase digester it is possible that the larger granule sludge of proportion, in selection methane phase circulation line rank
When, blade diameter length ratio preferably decreases with reference to above-mentioned acidogenic reactor numberical range.
Relative to the prior art, cycle mixing in the efficient two-phase anaerobic digestion device for promoting production acid described in the invention
Device has the advantage that：
(1) in the efficient two-phase anaerobic digestion device for promoting production acid described in the invention cycle mixing arrangement it is multistage into
Material system can increase the time of contact of the sour phase microorganism of production and material, improve product acid activity, increase material degradation efficiency.
(2) the efficient interior cycle mixing arrangement of two-phase anaerobic digestion device for promoting production acid described in the invention is compared to machinery
The binary vortices mixing effect of stirring can realize at least four vortex stirrings simultaneously in digester, reduce stagnant wake, extend material
Hydraulic detention time, it can be ensured that high solid waste is uniformly mixed with microorganism under low energy consumption；It can also obtain simultaneously more uniformly
Speed field distribution, will not because violent vortex effect destroy sludge flco, be more advantageous to Granular sludge formation.
(3) cycle mixing arrangement realizes pair in the efficient two-phase anaerobic digestion device for promoting production acid described in the invention
The flexible modulation of operation reserve, when Hydraulic Circulation rank and operation can be adjusted according to the viscosity of material, solid content and organic loading
Between, circulating pump can be adjusted according to the distributing position of sludge and material in reactor and opens number of units and cycle rank, improves two
Phase system operational efficiency.
(4) in the efficient two-phase anaerobic digestion device for promoting production acid described in the invention cycle mixing arrangement top into
Material and hydraulic system can play the role of destruction scum layer, prevent scum silica frost from crusting.
Description of the drawings
The attached drawing for forming the part of the invention is used for providing further understanding the invention, present invention wound
The illustrative embodiments and their description made do not form the improper restriction to the invention for explaining the invention.
In attached drawing：
Fig. 1 is cycle mixing arrangement in the two-phase anaerobic digestion device of the efficient promotion production acid described in the invention embodiment
Schematic diagram；
Fig. 2 is that cycle mixes dress in the two-phase anaerobic digestion device of the efficient promotion production acid described in the invention embodiment 2
The schematic diagram put.
Reference sign：
The sour digester of 1- productions；2- methane phase digesters；3- recycles water conservancy pipeline；The sour feed system of 11- productions；12- production acid follows
Loop system；The sour feeding pipe of 111- level-ones production；The sour feeding pipe of 112- two levels production；The sour feed pump of 113- productions；114- level-ones production acid
Material inlet valve；The sour material inlet valve of 115- two levels production；The sour circulation line of 121- level-ones production；The sour circulation line of 122- two levels production；123-
Produce acid circulating pump；The sour circulation valve of 124- level-ones production；The sour circulation valve of 125- two levels production；126- production acid cycle inlet valves；
The sour circulation valve of 127- three-levels production；21- methane phase feed systems；The 22- methane phase circulatory systems；211- level-one methane phase feed pipes
Road；212- methane phase feed pumps；213- level-one methane phase material inlet valves；221- level-one methane phase circulation lines；222- two levels are produced
Methane cycle pipeline；223- three-level methane phase circulation lines；224- methane phase circulating pumps；225- level-one methane phase circulation valves；
226- two level methane phase circulation valves；227- three-level methane phase circulation valves；228- methane phases recycle inlet valve；31- production acid
Phase flowing water Valve.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can
To be combined with each other.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments creates.
As shown in Figs. 1-2, cycle mixing arrangement in a kind of efficient two-phase anaerobic digestion device for promoting production acid, disappears including production acid
Change device 1, methane phase digester 2, by recycling 3 phase of water conservancy pipeline between the production acid digester 1 and methane phase digester 2
Even；
The sour feed system 11 of production and at least one set of production acid circulation system 12, institute are provided on the sour digester 1 of the production
The sour feed system 11 of production stated includes the sour feed pump 113 of production and the production acid feeding pipe of at least level-one, the production acid feed pump
113 are connected with the sour feeding pipe of production, and the sour feeding pipe of the production enters in the production acid digester 1, the production acid into
Expects pipe road is provided with the sour material inlet valve of production, and the production acid circulation system 12 includes production acid circulating pump 123 and at least level-one
The sour circulation line of production, the production acid circulating pump 123 are connected with the production acid circulation line, the production acid circulation line into
Enter in the production acid digester 1, the sour circulation valve of production is provided on the production acid circulation line.
Methane phase feed system 21 and at least one set of methane phase circulatory system are provided on the methane phase digester 2
22, the cycle water conservancy pipeline 3 is connected with the methane phase feed system 21, and the methane phase feed system 21 includes
Methane phase feed pump 212 and methane phase feeding pipe, the methane phase feed pump 212 are connected with methane phase feeding pipe, institute
The methane phase feeding pipe stated enters in the methane phase digester 2, and production first is provided on the methane phase feeding pipe
Alkane material inlet valve, the methane phase circulatory system 22 include methane phase circulating pump 224 and the methane phase circulation pipe of at least level-one
Road, the methane phase circulating pump 224 are connected with the methane phase circulation line, and the methane phase circulation line enters institute
In the methane phase digester 2 stated, methane phase circulation valve is provided on the methane phase circulation line.
The side of the production acid circulating pump 123 is provided with production acid cycle inlet valve 126；The methane phase circulating pump
224 side is provided with methane phase cycle inlet valve 228.
The sour phase flowing water Valve 31 of production is provided on the cycle water conservancy pipeline 3.
Unilateral production acid is provided with during the diameter d ＜ 10m of the sour digester 1 of the production, on the sour digester 1 of the production to follow
Loop system 12 during diameter 10m≤d≤20m of the described sour digester 1 of production, is provided with symmetrical on the production acid digester 1
The production acid circulation system 12 of bilateral during the diameter d ＞ 20m of the described sour digester 1 of production, is set on the production acid digester 1
There is equally distributed 3 groups or more of production acid circulation system 12.
During the blade diameter length ratio l ＞ 1.5 of the sour digester 1 of the production, two level production acid is provided on the production acid digester 1 and is followed
During 0.5≤l of blade diameter length ratio of the described sour digester 1 of production≤1.5, three are provided on the production acid digester 1 for endless tube road 122
During the blade diameter length ratio l ＜ 0.5 of the sour digester 1 of the production, four are provided on the production acid digester 1 for grade production sour circulation line
Grade or more the sour circulation line of production.
When solid content is less than 3% in material, the described sour digester 1 of production using the production acid feeding pipe of level-one or two level into
Material；When solid content is more than or equal to 3% in material, the production acid digester 1 uses top feed mode.
The sour feeding pipe 111 of level-one production enters the sour digester 1 of production from bottom, and two level produces sour feeding pipe 112 from liquid layer top
Portion enters the sour digester 1 of production, and valve is set respectively among pipeline.And three can be set respectively according to the height of the sour digester 1 of production
The sour feeding pipe of the more stages such as grade, level Four production.The sour circulation line of production is pumped into mixed fermentation liquid, level-one from sour 1 middle part of digester of production
The sour circulation line 121 of production stretches into the sour digester 1 of production from bottom, centre add can independent control valve, the sour circulation line of two level production
122 stretch into the sour digester 1 of production at the top of liquid layer, and centre adds can independent control valve.It equally can be according to digester height, material
The actual conditions such as solid content, volumetric loading, sludge and material distribution situation add the sour circulation pipe of the more stages such as three-level, level Four production
Road.
During the diameter d ＜ 8m of the methane phase digester 2, unilateral production is provided on the methane phase digester 2
Methane cycle system 22 during diameter 8m≤d≤15m of the methane phase digester 2, is set on the methane phase digester 2
It is equipped with the methane phase circulatory system 22 of symmetrical bilateral, during the diameter d ＞ 15m of the methane phase digester 2, the production first
Equally distributed 3 groups or more of the methane phase circulatory system 22 is provided on alkane digester 2.
During the blade diameter length ratio l ＞ 1.4 of the methane phase digester 2, two level production is provided on the methane phase digester 2
Methane cycle pipeline 222, during 0.4≤l of blade diameter length ratio of the methane phase digester 2≤1.4, the methane phase digester 2
On be provided with three-level methane phase circulation line 223, during the blade diameter length ratio l ＜ 0.4 of the methane phase digester 2, the production first
Level Four more than methane phase circulation line is provided on alkane digester 2.
The operation of multistage feeding pipe and hydraulic circulating is controlled by circulating pump and valve, can be started as needed
The feed system and the circulatory system of different stage.
When producing, sour digester 1 is equipped with the sour feed system 11 of production and 2 groups are symmetrically produced acid circulation system 12, production acid charging system
System 11 includes the sour feed pump 113 of production and the production acid feeding pipe of two level, and the production acid circulation system 12 includes production acid circulating pump
123 with the production acid circulation line of two level when：
For the sour digester 1 of production, sour feed pump 113 is produced when starting, the sour material inlet valve 114 of level-one production is opened, closes two level
, it can be achieved that the up flow type of low solid content waste or waste water is fed during production acid material inlet valve 1153；When the sour feed pump 113 of production, open
The sour material inlet valve 1153 of two level production is closed when level-one produces sour material inlet valve 114, it can be achieved that high solid content feeds waste；Work as startup
Sour feed pump 113 is produced, it can be achieved that height has when starting simultaneously at the sour material inlet valve 114 of level-one production and two level production acid material inlet valve 1153
The waste of machine load or waste water water distribution uniformity.Acid circulating pump 123 is produced when starting, opens production acid cycle inlet valve 126 and level-one
The sour circulation valve 124 of production, it can be achieved that the hydraulic mixing of lower part sludge blanket, strengthens material when closing two level production acid circulation valve 125
Uniform with microorganism mixes, and increases material hydraulic detention time；According to actual conditions, can also be followed by opening another group of production acid
Loop system 12 reaches above-mentioned purpose.Sour feed pump 113 is produced when starting, production acid cycle inlet valve 126 is opened and level-one production acid follows
Ring valve door 124, it can be achieved that the stirring of upper strata liquid level, achievees the purpose that local broken shell when closing production acid circulating pump 123；According to reality
Border situation can also reach above-mentioned purpose by opening another group of production acid circulation system 12.Sour feed pump 113 is produced when starting, simultaneously
, it can be achieved that production acid when opening the sour cycle inlet valve 126 of production, the sour circulation valve 124 of level-one production and two level production acid circulation valve 125
The whole body-internal-circulation of zymotic fluid and the local broken shell of reinforcing.It, can also be by can also be followed by opening another group of production acid according to actual conditions
Loop system 12 reaches above-mentioned purpose.When starting production acid circulating pump 123 simultaneously, production acid cycle inlet valve 126, level-one production acid are opened
Circulation valve 124, it can be achieved that high sludge content or the digester dirt containing granule sludge when closing two level production acid circulation valve 125
It the whole circulating sludge of mud layer and is mixed with the uniform of material, achievees the purpose that strengthen production acid, fermentation gas is promoted to float.When simultaneously
Acid circulating pump 123 is produced, opens production acid cycle inlet valve 126, the sour circulation valve 125 of two level production closes the sour circulating valve of level-one production
, it can be achieved that the whole circulation stirring of upper strata liquid level, achievees the purpose that liquid level scum layer entirety broken shell during door 124.When simultaneously, 2 groups are opened
Movable property acid circulating pump 123 opens sour 124, the 2 groups of two level production acid of circulation valve of 2 groups of production acid cycle inlet valves, 126,2 groups of level-one productions
During circulation valve 125, the whole cycle that sludge blanket and upper strata liquid level and storeroom can be achieved at the same time mixes and scum layer is integrally held
The effect of continuous broken shell.The operation of more than two level charging and Hydraulic Circulation hybrid system can analogize according to described.
When methane phase digester 2 is equipped with methane phase feed system 21 and 2 groups of symmetrical methane phase circulatory systems 22, production first
Alkane feed system 21 includes methane phase feed pump 212 and the methane phase feeding pipe of level-one, the methane phase circulatory system 22
During methane phase circulation line including methane phase circulating pump 224 and three-level：
For methane phase digester 2, when starting methane phase circulating pump 224, methane phase cycle inlet valve 228 and one is opened
Grade methane phase circulation valve 225, when closing two level methane phase circulation valve 226 and three-level methane phase circulation valve 227, it can be achieved that
The mesh that the circulation stirring of sludge blanket in methane phase digester 2, promotion topical substance exchange rate and fermentation gas are overflowed from sludge blanket
's.According to actual conditions, also above-mentioned purpose can be reached by starting another group of methane phase circulatory system 22.It is followed when starting methane phase
Ring pump 224 opens methane phase cycle inlet valve 228 and three-level methane phase circulation valve 227, closes level-one methane phase circulating valve
, it can be achieved that the circulation stirring of upper strata liquid level is, it can be achieved that strengthening broken shell, promoting dirt when door 225 and two level methane phase circulation valve 226
Fermentation gas rapid increase caused by mud layer, while larger bubble is destroyed, the Mud up-floating of air pocket entrained with is avoided to cause dirt
The purpose that mudflow loses.According to actual conditions, also above-mentioned purpose can be reached by opening another group of methane phase circulatory system 22.When opening
Movable property methane cycle pump 224 opens methane phase cycle inlet valve 228, level-one methane phase circulation valve 225 and three-level methane phase
Circulation valve 227, it can be achieved that continuing the purpose of broken shell when closing two level methane phase circulation valve 226.For using sludge flco as
Main methane phase digester 2 can also be achieved the purpose of the whole cycle mixing of zymotic fluid in anaeroic digestor；For with particle dirt
Methane phase digester 2 based on mud then can be achieved to accelerate the purpose of topical substance exchange and gas overflowing.According to actual conditions,
Also it can reach above-mentioned purpose by starting another group of methane phase circulatory system 22.When starting methane phase circulating pump 224, production first is opened
Alkane cycle inlet valve 228, the sour circulation valve 125 of two level production and the sour circulation valve 127 of three-level production, close the sour circulating valve of level-one production
, it can be achieved that forced fermentation gas bubble rises, destroys air pocket and continue the purpose of broken shell during door 124.According to actual conditions, may be used also
Reach above-mentioned purpose by opening another group of methane phase circulatory system 22.When start methane phase circulating pump 224, methane phase recycle into
Penstock 228, level-one methane phase circulation valve 225, two level methane phase circulation valve 226 and three-level methane phase circulation valve 227
When, it can be achieved that strengthen digester in zymotic fluid entirety mixing circulation and continue broken shell purpose.According to actual conditions, can also pass through
Start another group of methane phase circulatory system 22 and reach above-mentioned purpose..
For based on granule sludge or methane phase digester 2 that volume is larger, such as finding part under the above-mentioned method of operation
Circulation power is insufficient or broken shell effect is limited, then can run hybrid system in the following manner：It is followed when starting 2 groups of methane phases simultaneously
Ring pump 224 opens 2 groups of methane phase cycle inlet valves 228 and 2 groups of level-one methane phase circulation valves 225, closes 2 groups of two level productions
, it can be achieved that the purpose of sludge blanket entirety circulation stirring when sour circulation valve 125 and 2 groups of three-level production acid circulation valves 127；When simultaneously
Start 2 groups of methane phase circulating pumps 224, open 2 groups of methane phase cycle 228,2 groups of level-one methane phase circulation valves 225 of inlet valve
And 2 groups of two level methane phase circulation valves 226, it can be achieved that reinforcement sludge layer when closing 2 groups of three-level methane phase circulation valves 227
The purpose that circulation stirring and fermentation gas overflow；When starting 2 groups of methane phase circulating pumps 224 simultaneously, 2 groups of methane phase cycle water inlets are opened
228,2 groups of level-one methane phase circulation valves 225 of valve and 2 groups of three-level methane phase circulation valves 227 close 2 groups of two level methane phases
, it can be achieved that the broken shell of scum layer entirety and zymotic fluid integrally recycle the purpose of mixing during circulation valve 226；When 2 groups of productions of startup simultaneously
Methane cycle pump 224 opens the sour circulation valve 125 of 2 groups of methane phase cycle inlet valves, 228,2 groups of two level productions and 2 groups of three-level productions
Sour circulation valve 127, it can be achieved that reinforcing scum layer entirety broken shell and entirety promote when closing 2 groups of level-one production acid circulation valves 124
Fermentation gas, which floats, destroys the purpose of air pocket；When starting 2 groups of methane phase circulating pumps 224 simultaneously, 2 groups of methane phase cycle water inlets are opened
228,2 groups of valve, 225,2 groups of level-one methane phase circulation valve two level methane phase circulation valve 226 and 2 groups of three-level methane phase cycles
Valve 227, can be achieved at the same time the broken shell of scum layer entirety and forced fermentation liquid integrally recycles the purpose of mixing.Charging more than three-level
And the operation of Hydraulic Circulation hybrid system can analogize according to described.
Embodiment 1
The invention is utilized in Hefei City's changing food waste into resources and is applied in harmless treatment engineering, should
Engineering is handled daily to Hefei City 150m3Kitchen garbage carry out biogas energy processing.
The production acid digester 1 of the biogas engineering is using full-mixing type anaerobic reactor (CSTR), digester volume 2500m3, directly
Diameter 18m, high 10.5m；Our company employs the sour feed system 11 of two level production in the production acid digester 1 of kitchen garbage processing engineering
And two level production acid circulation system 12.Level-one is provided in the 1m eminences of digester and produces sour material inlet valve 114, and 9.9m eminences are provided with
The sour material inlet valve 115 of two level production.Because kitchen garbage solid content is higher, the mode of top feed pipe charging is taken, and is long term
Bottom feed pipe has been reserved in the processing of landfill leachate.It is larger in view of blade diameter length ratio, it has been symmetrical arranged two along reactor diameter
Acid circulating pump 123 is produced, and production acid cycle inlet valve 126 has been symmetrical arranged at the sour digester 17m of production, is symmetrical arranged at 1.2m
Level-one production sour circulation valve 124 has been symmetrical arranged the sour circulation valve 125 of two level production at 10m.It is followed when starting 2 groups of production acid simultaneously
Ring pump 123 opens 2 groups of production acid cycle inlet valves, 126,2 groups of sour circulation valves 124 of level-one production, closes 2 groups of two level production acid cycles
It during valve 125, produces the whole circulating sludge of 1 sludge blanket of sour digester and is mixed with the uniform of material, reach reinforcing production acid, promote
The purpose that fermentation gas floats.When starting 2 groups of production acid circulating pumps 123 simultaneously, 2 groups of production acid 126,2 group two of inlet valves of cycle are opened
The sour circulation valve 125 of grade production, it can be achieved that the whole circulation stirring of upper strata liquid level when closing the sour circulation valve 124 of 2 groups of level-ones productions,
Achieve the purpose that liquid level scum layer entirety broken shell.When starting 2 groups of production acid circulating pumps 123 simultaneously, 2 groups of production acid cycle inlet valves are opened
During 124,2 groups of two level production acid circulation valves 125 of the sour circulation valve of 126,2 groups of level-one productions of door, sludge blanket and upper strata can be achieved at the same time
The whole cycle mixing of liquid level and storeroom and scum layer strengthen the effect of broken shell.
Engineer application effect shows that the invention can effectively realize high solid material charging and the mesh uniformly mixed
, and whole broken shell, local strengthening broken shell, whole mixing, layered circulation can be carried out respectively according to actual needs, it realizes and avoids
Digester crust, the purpose strengthening mass transfer, reduce digester stagnant wake, reducing energy consumption significantly improve the production acid efficiency of CSTR.
Through statistics, the COD variations of kitchen garbage are very big during charging, and content is up to 50000-100000mg/L, and COD is down to after acidogenic fermentation
33000mg/L hereinafter, wherein Volatile fatty acid contents stabilization at 31000mg/L or so (in terms of COD), acidification rate reaches 95%
More than, and maintain stable acid production rate.Since kitchen garbage processing engineering comes into operation from October, 2017, run always
Normally, do not occurred the situation for crusting or acid production rate being caused to have larger fluctuation due to material stirring is uneven.Also, run in because
The control strategy that multi-stage water power cycle flexibly switches, the 400kwh/d energy with feasibility study stage are taken according to actual needs
Consumption prediction is compared, and the power consumption of this system is only 250kwh/d, and power saving rate has reached 37%.The invention is demonstrated in reality
Applicability and economy in engineering.
The methane phase digester 2 of the biogas engineering is using up-flow anaerobic sludge blanket (UASB), 2 volume of methane phase digester
1500m3, diameter 14m, high 10m.Our company the kitchen garbage processing engineering UASB digesters in employ level-one methane phase into
Material system 21 and the three-level methane phase circulatory system 22.Bottom sets methane phase feed pump 212, is pumped into sour 1 top of digester of production and is discharged.
It is larger in view of blade diameter length ratio, two methane phase circulating pumps 224 are symmetrical arranged along reactor diameter, in methane phase digester
Methane phase cycle inlet valve 228 has been symmetrical arranged at 25.5m, level-one methane phase circulation valve 225 has been symmetrical arranged at 0.8m,
The sour circulation valve 125 of two level production has been symmetrical arranged at 7.2m, the sour circulation valve 127 of three-level production has been symmetrical arranged at 9.5m.When same
2 groups of methane cycle pumps of Shi Qidong, open 2 groups of methane phase cycle inlet valves 228 and 2 groups of level-one methane phase circulation valves 225, close
, it can be achieved that sludge blanket integrally recycles stirs when closing 2 groups of two level methane phase circulation valves 226 and 2 groups of three-level methane phase circulation valves 227
The purpose mixed；When starting 2 groups of methane phase circulating pumps 224 simultaneously, 2 groups of methane phase cycle inlet valves, 228,2 groups of level-one productions are opened
Methane cycle valve 225 and 2 groups of three-level methane phase circulation valves 227, can be real when closing 2 groups of two level methane phase circulation valves 226
Existing scum layer entirety broken shell and zymotic fluid integrally recycle the purpose of mixing；When starting 2 groups of methane cycle pumps simultaneously, 2 groups of productions are opened
228,2 groups of methane cycle inlet valve, 225,2 groups of level-one methane phase circulation valve two level methane phase circulation valve 226 and 2 group three
Grade methane phase circulation valve 227, can be achieved at the same time the broken shell of scum layer entirety and forced fermentation liquid integrally recycles the purpose of mixing.
Engineer application effect shows that the invention can effectively realize that digester synchronizes charging and the purpose being mixed,
And whole broken shell, local strengthening broken shell, whole mixing, layered circulation can be carried out respectively according to actual needs, it realizes and avoids disappearing
Change device crust, the purpose strengthening mass transfer, reduce digester stagnant wake, reducing energy consumption, significantly improve the biogas output of UASB.Through
Statistics, COD is about 30000mg/L or so during charging, and water outlet COD is only 1600mg/L or so, and daily output methane quantity is up to 6000m3/
D, and maintain stable biogas yield.Since kitchen garbage processing engineering comes into operation from September, 2017, run always just
Often, do not occurred the situation for crusting or biogas output being caused to have larger fluctuation due to material stirring is uneven.Also, run in because
The control strategy that multi-stage water power cycle flexibly switches, the energy with feasibility study stage 600kwh/d are taken according to actual needs
Consumption prediction is compared, and the power consumption of this system is averagely only 320kwh/d, and power saving rate has reached 46%.The invention is demonstrated to exist
Applicability and economy in Practical Project.
Embodiment 2
The invention has also been utilized in Taiyuan City's changing food waste into resources and has been applied in harmless treatment engineering, should
Engineering is handled daily to Taiyuan City 250m3Kitchen garbage carry out biogas energy processing.
The production acid digester 1 of the biogas engineering uses 2 full-mixing type anaerobic reactors (CSTR), digester volume
1000m3, diameter 9m, high 16m；In view of kitchen garbage solid content is higher, proportion is larger, the sour feed system of level-one production is employed
11 top feeds are provided with level-one in the 15m eminences of digester and produce sour material inlet valve 114.It is smaller with reference to the production acid digester 1
Blade diameter length ratio, our company employed in the production acid digester 1 of kitchen garbage processing engineering unilateral three-level production acid circulation system 12 (see
Fig. 2), be provided with production acid cycle inlet valve 126 in 9 meters of eminences, respectively 1.5m, 12m and 15m at it is unilateral there is provided level-one,
Two level and the sour circulation valve 127 of three-level production.Acid circulating pump 123 is produced when starting, opens production acid cycle inlet valve 126 and level-one production
Sour circulation valve 124, it can be achieved that sludge blanket is whole when closing the sour circulation valve 125 of two level production and three-level production acid circulation valve 127
The purpose of circulation stirring；Acid circulating pump 123 is produced when starting, opens production acid cycle inlet valve 126, the sour circulation valve of level-one production
124 and the sour circulation valve 127 of three-level production, it can be achieved that the broken shell of scum layer entirety and fermentation when closing the sour circulation valve 125 of two level production
Liquid integrally recycles the purpose of mixing；Acid circulating pump 123 is produced when starting, opens production acid cycle inlet valve 126, level-one production acid cycle
When valve 124, the sour circulation valve 125 of two level production and the sour circulation valve 127 of three-level production, can be achieved at the same time the broken shell of scum layer entirety and
Forced fermentation liquid integrally recycles the purpose of mixing.
Engineer application effect again shows that the invention can effectively realize what high solid material fed and uniformly mixed
Purpose, and whole broken shell, local strengthening broken shell, whole mixing, layered circulation can be carried out respectively according to actual needs, it realizes and keeps away
Exempt from digester crust, the purpose strengthening mass transfer, reduce digester stagnant wake, reducing energy consumption, significantly improve the production acid effect of CSTR
Rate.Through statistics, the COD variations of kitchen garbage are very big during charging, and content is up to 50000-100000mg/L, COD after acidogenic fermentation
36000mg/L is down to hereinafter, wherein Volatile fatty acid contents stabilization is at 34000mg/L or so (in terms of COD), acidification rate reaches
More than 95%, and maintain stable acid production rate.Since kitchen garbage processing engineering comes into operation from October, 2017, always
Normal operation did not occurred the situation for crusting or acid production rate being caused to have larger fluctuation due to material stirring is uneven.Also, it runs
The middle control strategy flexibly switched because taking multistage production acid circulation system 12 according to actual needs, with feasibility study stage
The prediction of 370kwh/d energy consumptions is compared, and the power consumption of this system is only 240kwh/d, and power saving rate has reached 35%.Demonstrate this patent
Applicability and economy of the technology in Practical Project.
The methane phase digester 2 of the biogas engineering employs up-flow anaerobic sludge blanket (UASB), digester volume
580m3, diameter 7m, high 15m.Our company employs the charging of level-one methane phase in the UASB digesters of kitchen garbage processing engineering
System 21, bottom sets feed pump, is pumped into 2 top of methane phase digester and is discharged.Smaller in view of blade diameter length ratio, our company is in the kitchen rubbish
The lateral three-level methane phase circulatory system 22 (see Fig. 2) is employed in the production alkane digester of rubbish processing engineering, is provided in 8 meters of eminences
Circulating pump inlet valve, it is unilateral at 1.4m, 11m and 14m respectively to be provided with level-one, two level and three-level methane phase circulation valve
227.When starting methane phase circulating pump 224, methane phase cycle inlet valve 228 and level-one methane phase circulation valve 225 are opened, is closed
, it can be achieved that the mesh of sludge blanket entirety circulation stirring when closing two level methane phase circulation valve 226 and three-level methane phase circulation valve 227
's；When starting methane phase circulating pump 224, methane phase cycle inlet valve 228, level-one methane phase circulation valve 225 and three are opened
Grade methane phase circulation valve 227, it can be achieved that the broken shell of scum layer entirety and zymotic fluid when closing two level methane phase circulation valve 226
The purpose of whole cycle mixing；When starting methane phase circulating pump 224, methane phase cycle inlet valve 228, level-one methane phase are opened
Scum layer entirety can be achieved at the same time in circulation valve 225, two level methane phase circulation valve 226 and three-level methane phase circulation valve 227
Broken shell and forced fermentation liquid integrally recycle the purpose of mixing.
Engineer application effect shows that the invention can effectively realize that the methane phase digester 2 synchronizes charging and mixing is stirred
The purpose mixed, and whole broken shell, local strengthening broken shell, whole mixing, layered circulation can be carried out respectively according to actual needs, it realizes
Digester crust, the purpose strengthening mass transfer, reduce digester stagnant wake, reducing energy consumption are avoided, significantly improves the natural pond of UASB
Gas yield.Through statistics, COD is about 36000mg/L or so during charging, and water outlet COD is only 1400mg/L or so, and daily output methane quantity can
Up to 7200m3/ d, and maintain stable biogas yield.Since kitchen garbage processing engineering comes into operation from October, 2017,
Normal operation always did not occurred the situation for crusting or biogas output being caused to have larger fluctuation due to material stirring is uneven, and
Molding granule sludge is turned out at present.Moreover, it is flexible because taking multi-stage water power cycle in operation according to actual needs
The control strategy of switching, compared with the energy consumption prediction of feasibility study stage 160kwh/d, the power consumption of this system is averagely only
110kwh/d, power saving rate have reached 31%.Demonstrate applicability and economy of the art of this patent in Practical Project.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection domain within.
Claims (9)
1. a kind of cycle mixing arrangement in efficient two-phase anaerobic digestion device for promoting production acid, it is characterised in that：Including production acid digestion
Device, methane phase digester are connected between the production acid digester and methane phase digester by recycling water conservancy pipeline；
Be provided with the sour feed system of production and at least one set of production acid circulation system on the described sour digester of production, the production acid into
Material system includes the sour feed pump of production and the production acid feeding pipe of at least level-one, the production acid feed pump and the sour feeding pipe phase of production
Even, the sour feeding pipe of described production enters in the production acid digester, be provided on the production acid feeding pipe production acid into
Expect valve, the production acid circulation system includes production acid circulating pump and the production acid circulation line of at least level-one, and the production acid follows
Ring pump is connected with the production acid circulation line, and the sour circulation line of the production enters in the production acid digester, described
The sour circulation valve of production is provided on the sour circulation line of production.
2. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：Methane phase feed system and at least one set of methane phase circulatory system are provided on the methane phase digester, it is described
Cycle water conservancy pipeline be connected with the methane phase feed system, the methane phase feed system include methane phase feed pump and
Methane phase feeding pipe, the methane phase feed pump are connected with methane phase feeding pipe, the methane phase feeding pipe into
Enter in the methane phase digester, methane phase material inlet valve, the production first are provided on the methane phase feeding pipe
The alkane circulatory system includes methane phase circulating pump and the methane phase circulation line of at least level-one, the methane phase circulating pump with it is described
Methane phase circulation line be connected, the methane phase circulation line enter the methane phase digester in, the production first
Methane phase circulation valve is provided on alkane circulation line.
3. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：The side of the production acid circulating pump is provided with production acid cycle inlet valve；The side setting of the methane phase circulating pump
There is methane phase to recycle inlet valve.
4. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：The sour phase flowing water Valve of production is provided on the cycle water conservancy pipeline.
5. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：During the diameter d ＜ 10m of the sour digester of the production, unilateral production acid circulation system is provided on the sour digester of the production,
During diameter 10m≤d≤20m of the sour digester of the production, the production acid of symmetrical bilateral is provided on the sour digester of the production
During the diameter d ＞ 20m of the described sour digester of production, equally distributed 3 groups are provided on the production acid digester for the circulatory system
Above production acid circulation system.
6. efficiently promote cycle mixing arrangement, feature in the two-phase anaerobic digestion device of production acid according to claim 1 or 5
It is：During the blade diameter length ratio l ＞ 1.5 of the sour digester of the production, the sour circulation pipe of two level production is provided on the production acid digester
During 0.5≤l of blade diameter length ratio of the described sour digester of production≤1.5, three-level production acid cycle is provided on the production acid digester for road
Pipeline during the blade diameter length ratio l ＜ 0.5 of the described sour digester of production, is provided with more than level Four on the production acid digester and produces acid and follow
Endless tube road.
7. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：When solid content is less than 3% in material, the sour digester of the production is using the charging of the production acid feeding pipe of level-one or two level；Object
When solid content is more than or equal to 3% in material, the production acid digester uses top feed mode.
8. cycle mixing arrangement in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1, feature exist
In：During the diameter d ＜ 8m of the methane phase digester, unilateral methane phase cycle is provided on the methane phase digester
System during diameter 8m≤d≤15m of the methane phase digester, is provided with symmetrical double on the methane phase digester
The methane phase circulatory system of side during the diameter d ＞ 15m of the methane phase digester, is set on the methane phase digester
There is equally distributed 3 groups or more of the methane phase circulatory system.
9. recycle mixing arrangement, feature in the efficient two-phase anaerobic digestion device for promoting production acid according to claim 1 or 8
It is：During the blade diameter length ratio l ＞ 1.4 of the methane phase digester, two level methane phase is provided on the methane phase digester
During 0.4≤l of blade diameter length ratio of the methane phase digester≤1.4, three are provided on the methane phase digester for circulation line
Grade methane phase circulation line during the blade diameter length ratio l ＜ 0.4 of the methane phase digester, is set on the methane phase digester
There is level Four more than methane phase circulation line.
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| CN201437514U (en) * | 2009-04-18 | 2010-04-14 | 宜兴市泽江环境工程科技有限公司 | Low-energy-consumption high-efficiency circulating device of anaerobic reactor |
| CN102827878A (en) * | 2012-08-02 | 2012-12-19 | 上海交通大学 | Method of treating kitchen waste by using kitchen waste treating apparatus |
| US20130065290A1 (en) * | 2010-01-04 | 2013-03-14 | Kirloskar Integrated Technologies Limited | Combined dry and wet dual phase anaerobic process for biogas production |
| CN202830029U (en) * | 2012-10-26 | 2013-03-27 | 杭州腾德能源环保工程有限公司 | Crust-breaking anaerobic fermentation device |
| CN106190788A (en) * | 2015-05-29 | 2016-12-07 | 云南师范大学 | The stirring of follow-on anaeroic digestor biogas slurry and broken shell circulation line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201437514U (en) * | 2009-04-18 | 2010-04-14 | 宜兴市泽江环境工程科技有限公司 | Low-energy-consumption high-efficiency circulating device of anaerobic reactor |
| US20130065290A1 (en) * | 2010-01-04 | 2013-03-14 | Kirloskar Integrated Technologies Limited | Combined dry and wet dual phase anaerobic process for biogas production |
| CN102827878A (en) * | 2012-08-02 | 2012-12-19 | 上海交通大学 | Method of treating kitchen waste by using kitchen waste treating apparatus |
| CN202830029U (en) * | 2012-10-26 | 2013-03-27 | 杭州腾德能源环保工程有限公司 | Crust-breaking anaerobic fermentation device |
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