CN105347478A - High-efficiency and low-energy consumption anaerobic digester and application thereof - Google Patents

High-efficiency and low-energy consumption anaerobic digester and application thereof Download PDF

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Publication number
CN105347478A
CN105347478A CN201510805527.6A CN201510805527A CN105347478A CN 105347478 A CN105347478 A CN 105347478A CN 201510805527 A CN201510805527 A CN 201510805527A CN 105347478 A CN105347478 A CN 105347478A
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order reaction
reaction room
reaction chamber
room
stage reaction
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CN105347478B (en
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武创
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Wisdri Engineering and Research Incorporation Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/286Anaerobic digestion processes including two or more steps
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2866Particular arrangements for anaerobic reactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel 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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention provides a high-efficiency and low-energy consumption anaerobic digester. The high-efficiency and low-energy consumption anaerobic digester comprises a first stage reaction chamber, a second stage reaction chamber and a third stage reaction chamber, and the second stage reaction chamber is arranged between the first stage reaction chamber and the third stage reaction chamber; and a three-phase separator is arranged in each of the first stage reaction chamber and the third stage reaction chamber, a stirrer is arranged in the second stage reaction chamber, the lower portion of the first stage reaction chamber is provided with a water inlet pipe, the upper portion of the first stage reaction chamber is connected with the upper portion of the second stage reaction chamber through a connecting pipe 1, the lower portion of the second stage reaction chamber is connected with the lower portion of the third stage reaction chamber through a connecting pipe 2, the upper portion of the third stage reaction chamber is provided with a water outlet pipe, and the tops of the first stage reaction chamber, the second stage reaction chamber and the third stage reaction chamber are connected with a biogas collecting pipe. The anaerobic digester combines the respective characteristics of an up-flow anaerobic reactor and a continuous stirring reactor, has a multistage structure, can realize maximal degradation and digestion of sludge in an anaerobic reactor, allows a large amount of biogas to be produced only through consuming a small amount of electric energy in the running process, and allows the generated sludge amount to be small due to reaction completeness.

Description

A kind of anaerobic digester of high-efficiency low energy consumption and application thereof
Technical field
The invention belongs to energy environment protection technical field, be specifically related to a kind of anaerobic digester and application thereof of high-efficiency low energy consumption.
Background technology
At present, for anaerobic digestion, there are a lot of relevant technology and application.As flow lifting type anaerobic reactor has the dual characteristics of anaerobism filtration and anaerobic activated sludge method, processing power is large, be not only applicable to high concentrated organic wastewater, also low-concentration organic waste water is applicable to, without the need to special whipping device, structure, operation maintenance management are relatively simple, and efficiency is high, energy consumption is low, and cost is low; Continuous-stirring reactor then realizes successive reaction, has saved the time with charging of feeding in raw material, by stirring the abundant contact reacts achieving reactant.But, due to the restriction of the structure, reaction conditions etc. of single flow lifting type anaerobic reactor and continuous-stirring reactor, hydraulic detention time is wherein not enough, in sewage, the precipitation of organic waste is insufficient, cause its gas producing efficiency not ideal enough, thus, its processing power and biogas yield limited, reaction not exclusively causes the waste of material.
Flow lifting type anaerobic reactor and continuous-stirring reactor combine by the present invention, form a kind of newly, more efficient anaerobic reactor, when with traditional anaerobic reactor same volume, can have higher reaction efficiency.
Summary of the invention
The object of the invention is the restriction of the structure, reaction conditions etc. overcoming existing single anaerobic reactor, its processing power and biogas yield limited, reaction not exclusively causes the problem of the waste of material.
For this reason, the invention provides a kind of anaerobic digester of high-efficiency low energy consumption, comprise first order reaction room, second order reaction room and third order reaction room;
Described first order reaction room and third order reaction chamber interior are equipped with triphase separator, described second order reaction chamber interior is provided with agitator, bottom, described first order reaction room is provided with water inlet pipe, be communicated with by pipe connecting one between described first order reaction room with top, second order reaction room, pipe connecting one is arranged on the top of the indoor triphase separator of first order reaction, be communicated with by pipe connecting two between second order reaction room with bottom, third order reaction room, pipe connecting two is arranged on the below of the indoor triphase separator of third order reaction, top, described third order reaction room is provided with rising pipe, described first order reaction room, second order reaction room and the top conducting of third order reaction room are provided with collecting methane pipe.
Further, the top of above-mentioned first order reaction room, second order reaction room and third order reaction room is provided with bilayer and locks well lid.
Further, above-mentioned first order reaction room, second order reaction room and third order reaction room adopt concrete structure or brickwork construction.
Further, the triphase separator of above-mentioned first order reaction room and third order reaction indoor is demountable structure.
Further, above-mentioned triphase separator is arranged on the middle part of first order reaction room and third order reaction room.
Further, above-mentioned water inlet pipe, pipe connecting one, adapter two and rising pipe mounting height are respectively 0.1 times, 0.85 times, 0.1 times and 0.85 times of position of reaction chamber height.
In addition, present invention also offers the application of the anaerobic digester of above-mentioned high-efficiency low energy consumption, comprise the steps:
1) water is entered in first order reaction room by water inlet pipe carry out anaerobic reaction, produce the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator in first order reaction room is separated, isolated biogas is collected by the collecting methane pipe at top, first order reaction room, sewage reaches the top of first order reaction room by triphase separator, mud sinks to bottom first order reaction room, proceeds anaerobic reaction.
2) sewage on the top of first order reaction room enters second order reaction room from pipe connecting one after reaching the submerge discharging flow height of pipe connecting one, under the stirring of agitator, carry out anaerobic reaction produce biogas, biogas is collected by the collecting methane pipe at top, second order reaction room, and reacted sewage then flows out from the pipe connecting two of bottom, second order reaction room.
3) sewage that pipe connecting two flows out enters third order reaction room and carries out anaerobic reaction, produces the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator in third order reaction room is separated, biogas is collected by the collecting methane pipe at top, third order reaction room, the top that sewage reaches third order reaction room by triphase separator is discharged from rising pipe, and mud sinks to bottom third order reaction room.
Further, in above-mentioned first order reaction room, second order reaction room and third order reaction room, the anaerobic reaction time is 7 days, and temperature of reaction is 30 ~ 55 DEG C.
Further, above-mentioned steps 2) in the diameter of agitator be 20% ~ 50% of second order reaction room diameter, the rotating speed of agitator is 40r/min ~ 80r/min.
Compared with prior art, beneficial effect of the present invention:
(1) anaerobic digester of this high-efficiency low energy consumption provided by the invention adopts third order reaction structure flow lifting type anaerobic reactor and continuous-stirring reactor to be combined, there is longer hydraulic detention time, react more complete, the methane quantity produced is large, residual sludge quantity is few, and sewage is farthest degraded and digested.
(2) anaerobic digester of this high-efficiency low energy consumption provided by the invention when the volume identical with the single anaeroic digestor of tradition and energy consumption, can provide higher reaction efficiency, thus produces more biogas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the anaerobic digester of high-efficiency low energy consumption of the present invention.
Fig. 2 is the schematic top plan view cutting rear upper part in Fig. 1 along A-A direction open.
Fig. 3 is the schematic top plan view cutting posterior portion in Fig. 1 along B-B direction open.
Description of reference numerals: 1, first order reaction room; 2, second order reaction room; 3, third order reaction room; 4, water inlet pipe; 5, triphase separator; 6, pipe connecting one; 7, agitator; 8, pipe connecting two; 9, rising pipe; 10, well lid; 11, collecting methane pipe.
Embodiment
Embodiment 1:
In order to overcome the structure of existing single anaerobic reactor, the restriction of reaction conditions etc., its processing power and biogas yield limited, reaction not exclusively causes the problem of the waste of material, present embodiments provide a kind of as Fig. 1, the anaerobic digester of the high-efficiency low energy consumption shown in Fig. 2 and Fig. 3, comprise first order reaction room 1, second order reaction room 2 and third order reaction room 3, described first order reaction room 1 and inside, third order reaction room 3 are equipped with triphase separator 5, inside, described second order reaction room 2 is provided with agitator 7, bottom, described first order reaction room 1 is provided with water inlet pipe 4, be communicated with by pipe connecting 1 between described first order reaction room 1 with top, second order reaction room 2, pipe connecting 1 is arranged on the top of triphase separator 5 in first order reaction room 1, be communicated with by pipe connecting 28 between second order reaction room 2 with bottom, third order reaction room 3, pipe connecting 28 is arranged on the below of triphase separator 5 in third order reaction room 3, top, described third order reaction room 3 is provided with rising pipe 9, described first order reaction room 1, second order reaction room 2 and third order reaction room 3 top conducting are provided with collecting methane pipe 11.
The application process of the anaerobic digester of this high-efficiency low energy consumption specifically comprises the steps:
1) water is entered in first order reaction room 1 by water inlet pipe 4 carry out anaerobic reaction, produce the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator 5 in first order reaction room 1 is separated, isolated biogas is collected by the collecting methane pipe 11 at top, first order reaction room 1, sewage reaches the top of first order reaction room 1 by triphase separator 5, mud sinks to bottom first order reaction room 1, proceeds anaerobic reaction.
2) sewage on the top of first order reaction room 1 enters second order reaction room 2 from pipe connecting 1 after reaching the submerge discharging flow height of pipe connecting 1, under the stirring of agitator 7, carry out anaerobic reaction produce biogas, biogas is collected by the collecting methane pipe 11 at top, second order reaction room 2, and reacted sewage then flows out from the pipe connecting 28 of bottom, second order reaction room 2.
3) sewage that pipe connecting 28 flows out enters third order reaction room 3 and carries out anaerobic reaction, produces the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator 5 in third order reaction room 3 is separated, biogas is collected by the collecting methane pipe 11 at top, third order reaction room 3, sewage reaches third order reaction room 3 top by triphase separator 5 is discharged from rising pipe 9, and mud sinks to bottom third order reaction room 3.
Wherein, in first order reaction room 1, second order reaction room 2 and third order reaction room 3, the anaerobic reaction time is 7 days, and temperature of reaction is 30 ~ 55 DEG C.And step 2) in the diameter of agitator 7 be 20% ~ 50% of second order reaction room 2 diameter, the rotating speed of agitator 7 is 40r/min ~ 80r/min.
Being oxygen-free environment in above-mentioned first order reaction room 1, second order reaction room 2 and third order reaction room 3, in order to ensure the gas producing efficiency of anaerobic digester, the seal operation of anaerobic digester must being carried out.Described first order reaction room 1, second order reaction room 2 and third order reaction room 3 adopt concrete structure or brickwork construction.
As one preferred embodiment, above-mentioned triphase separator 5 is arranged on the middle part of first order reaction room 1 and third order reaction room 3.Described water inlet pipe 4, pipe connecting 1, adapter 28 and rising pipe 9 mounting height are respectively 0.1 times, 0.85 times, 0.1 times and 0.85 times of position of reaction chamber height.
In addition, in order to make first order reaction room 1, second order reaction room 2 and third order reaction room 3 sealing effectiveness better, the top of described first order reaction room 1, second order reaction room 2 and third order reaction room 3 is provided with bilayer and locks well lid 10, well lid 10 is in sealed state at ordinary times, can be used as the manhole drawn clearly if desired.
And during for the ease of manually drawing clearly, entering the bottom of first order reaction room 1 and third order reaction room 3, the triphase separator 5 in described first order reaction room 1 and third order reaction room 3 is demountable structure.
Embodiment 2:
On the basis of embodiment 1, suppose the II class ordinary residence community of 1500 families, total population 5000 people, every day, sewage quantity was 20L/ people d per capita, and every day, ight soil amount was 0.4kg/ people d per capita.Adopt the methane-generating pit that embodiment 1 designs, as calculated, volume of disposing of sewage is:
V=1.2·N·α·a·T·(1-b)·K·m/[1000×(1-C)]
=1.2×5000×0.7×0.4×21×(1-0.95)×1.2×0.8/[1000×(1-0.9)]
=16m 3
In formula: N-community number, 5000;
α-community resident is in probability of going to toilet, and 0.7;
A-produces ight soil amount for each person every day, 0.4kg;
T-anaerobic digestion reaction vessel draws the cycle clearly, 21d;
Reduction in bulk coefficient after K-sludge fermentation, 0.8;
The per-cent of defeated mud is left over, 1.2 after m-draws clearly;
B-enters the concentration of wastewater of anaerobic digester, and 0.95;
C-goes out the concentration of wastewater of anaerobic digester, and 0.9.
Adopt the anaerobic digester of the present invention's design, unit ight soil produces methane quantity can reach 0.32m 3/ kg, higher than the 0.28m in conventional anaerobic digestion pond 3the gas production rate of/kg, it is 570m that anaerobic digester of the present invention on average produces methane quantity every day 3.Agitator motor adopts Y801-2 electric motor, and power N=0.75kW, consumes energy for 18kWh/d.And conventional anaerobic digestion pond, under the scale of the same process water yield, volume 16m 3, through consulting related data, producing methane quantity every day and being about 480m 3because traditional reactor is a whole reactor, therefore, anaerobic digester diameter is about the twice of second order reaction room diameter in the present invention, so the diameter of its agitator blades is also about the twice of agitator blades diameter in second order reaction room, in order to reach best stirring velocity equally, its power consumption is about 72kWh/d, is four times of agitator of the present invention power consumption.
Therefore, the anaerobic digester of this high-efficiency low energy consumption provided by the invention is compared with traditional anaerobic digester, and under same volume sewage load condition, the present invention has higher biogas output, lower power consumption.
In sum, the anaerobic digester of this high-efficiency low energy consumption provided by the invention adopts third order reaction structure flow lifting type anaerobic reactor and continuous-stirring reactor to be combined, and reaction is more complete, and the methane quantity of generation is large, residual sludge quantity is few, and sewage is farthest degraded and digested; With the single anaeroic digestor of tradition when identical volume and energy consumption, there is higher reaction efficiency, produce more biogas.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.

Claims (9)

1. an anaerobic digester for high-efficiency low energy consumption, is characterized in that: comprise first order reaction room (1), second order reaction room (2) and third order reaction room (3);
Described first order reaction room (1) and third order reaction room (3) inside are equipped with triphase separator (5), described second order reaction room (2) inside is provided with agitator (7), described first order reaction room (1) bottom is provided with water inlet pipe (4), described first order reaction room (1) is communicated with by pipe connecting one (6) with between second order reaction room (2) top, pipe connecting one (6) is arranged on the top of first order reaction room (1) interior triphase separator (5), be communicated with by pipe connecting two (8) between second order reaction room (2) with third order reaction room (3) bottom, pipe connecting two (8) is arranged on the below of third order reaction room (3) interior triphase separator (5), described third order reaction room (3) top is provided with rising pipe (9), described first order reaction room (1), second order reaction room (2) and third order reaction room (3) top conducting are provided with collecting methane pipe (11).
2. the anaerobic digester of high-efficiency low energy consumption as claimed in claim 1, is characterized in that: the top of described first order reaction room (1), second order reaction room (2) and third order reaction room (3) is provided with bilayer and locks well lid (10).
3. the anaerobic digester of high-efficiency low energy consumption as claimed in claim 1, is characterized in that: described first order reaction room (1), second order reaction room (2) and third order reaction room (3) adopt concrete structure or brickwork construction.
4. the anaerobic digester of high-efficiency low energy consumption as claimed in claim 1, is characterized in that: the triphase separator (5) in described first order reaction room (1) and third order reaction room (3) is demountable structure.
5. the anaerobic digester of high-efficiency low energy consumption as claimed in claim 4, is characterized in that: described triphase separator (5) is arranged on the middle part of first order reaction room (1) and third order reaction room (3).
6. the anaerobic digester of high-efficiency low energy consumption as claimed in claim 1, is characterized in that: described water inlet pipe (4), pipe connecting one (6), adapter two (8) and rising pipe (9) mounting height are respectively 0.1 times, 0.85 times, 0.1 times and 0.85 times of position of reaction chamber height.
7. the application of the anaerobic digester of the high-efficiency low energy consumption as described in any one of claim 1 ~ 6, is characterized in that: comprise the steps:
1) water is entered in first order reaction room (1) by water inlet pipe (4) carry out anaerobic reaction, produce the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator (5) in first order reaction room (1) is separated, isolated biogas is collected by the collecting methane pipe (11) at first order reaction room (1) top, sewage reaches the top of first order reaction room (1) by triphase separator (5), mud sinks to bottom, first order reaction room (1), proceeds anaerobic reaction;
2) second order reaction room (2) is entered from pipe connecting one (6) after the sewage on the top of first order reaction room (1) reaches the submerge discharging flow height of pipe connecting one (6), under the stirring of agitator (7), carry out anaerobic reaction produce biogas, biogas is collected by the collecting methane pipe (11) at second order reaction room (2) top, and reacted sewage then flows out from the pipe connecting two (8) of second order reaction room (2) bottom;
3) sewage that pipe connecting two (8) flows out enters third order reaction room (3) and carries out anaerobic reaction, produces the mixture of biogas, sewage, mud; Biogas, sewage, the mud mixture triphase separator (5) in third order reaction room (3) is separated, biogas is collected by the collecting methane pipe (11) at third order reaction room (3) top, sewage reaches third order reaction room (3) top by triphase separator (5) is discharged from rising pipe (9), and mud sinks to bottom, third order reaction room (3).
8. the application of the anaerobic digester of high-efficiency low energy consumption as claimed in claim 7, it is characterized in that: in described first order reaction room (1), second order reaction room (2) and third order reaction room (3), the anaerobic reaction time is 7 days, and temperature of reaction is 30 ~ 55 DEG C.
9. the application of the anaerobic digester of high-efficiency low energy consumption as claimed in claim 7, it is characterized in that: described step 2) in the diameter of agitator (7) be 20% ~ 50% of second order reaction room (2) diameter, the rotating speed of agitator (7) is 40r/min ~ 80r/min.
CN201510805527.6A 2015-11-20 2015-11-20 A kind of anaerobic digester of high-efficiency low energy consumption and its application Active CN105347478B (en)

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