CN100475716C

CN100475716C - an anaerobic bioreactor

Info

Publication number: CN100475716C
Application number: CNB2007100666915A
Authority: CN
Inventors: 郑平; 唐崇俭; 陈建伟; 胡宝兰
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2009-04-08
Anticipated expiration: 2027-01-12
Also published as: CN101007680A

Abstract

The invention discloses a high-effective anaerobic biological reactor, which comprises the following parts: reactor bulk, inlet pipe on the bottom of reactor bulk and upflow typed reacting chamber, wherein the upflow typed reacting chamber connects external cylinder of sediment chamber through increaser; the three-phased separator I chamber, mud gas elevating pipe are set in the sediment chamber; the three-phased separator II chamber is set on the top of mud gas elevating pipe with increaser on the bottom; the top of three-phased separator I chamber is reducer with gas collecting lid on the bottom; the reflux seam is set between gas collecting lid and increaser on the external cylinder to sediment mud; the mud gas elevating pipe connects the external cylinder through level support board, which connects flow baffle; the sediment chamber is set on the exterior of mud gas elevating pipe.

Description

A kind of anaerobic biological reactor

Technical field

The present invention relates to a kind of anaerobic biological reactor.

Background technology

Anaerobic Microbiological Treatment Technology is under anaerobic, utilizes the metabolism of microorganism, and organic pollutant is changed into biogas, thereby makes sewage reach the process of purification.Handle with aerobe and to compare, anaerobic biological treatment has that power consumption is little, and sludge yield is low, and can reclaim the characteristics of clean energy (biogas), is one of effective means that realizes recycling economy, has a extensive future.

Along with people to anaerobe process understanding deeply and to popularizing that Anaerobic Microbiological Treatment Technology is used, anaerobic biological reactor has also obtained exploitation preferably.So far, anaerobic biological reactor has been developed to the third generation.First-generation anaerobic biological reactor is representative with common anaerobic digester, and its essential characteristic is: reactor is full mixing, does not have the mud circulation, and processing efficiency is lower.S-generation anaerobic biological reactor is representative with upflow anaerobic sludge blanket process (UASB) reactor, and its essential characteristic is: be provided with three-phase separating device, and the mud recycle, processing efficiency is higher.Third generation anaerobic biological reactor is representative with anaerobic grain sludge expanded bed (EGSB) and anaerobism inner circulation reactor (IC), and its essential characteristic is: alleviated the short flow problem of UASB reactor emerged in operation, improved the processing efficiency of reactor.But third generation anaerobic biological reactor also has its inherent defective.For example, the EGSB reactor needs liquid return, has not only increased power consumption, and makes reactor be full mixing, and treatment efficiency and effluent quality are difficult to further raising.The IC reactor is prone to short stream before realizing internal recycle, the operation control ratio is difficulty.

At the above-mentioned defective of third generation anaerobic biological reactor, the present invention attempts to hold in reactor and stay high concentration sludge by the improvement to triphase separator; The limited reactions device is the back-mixing of section up and down, the treatment efficiency of enhanced reactor; By the effect of triphase separator I chamber, mud gas riser tube, triphase separator II chamber, alleviate the negative impact of short stream due to the ease on the biogas.Evidence, Kai Fa novel anaerobic biological reactor has good anaerobic treatment usefulness in view of the above, and has very high operation stability.

Summary of the invention

The purpose of this invention is to provide a kind of anaerobic biological reactor.

It has reactor body, be provided with water inlet pipe and flow lifting type reaction chamber in the reactor body lower end, the flow lifting type reaction chamber joins through increaser and settling chamber's out cylinder, be provided with the triphase separator I chamber that is connected in settling chamber's out cylinder, mud gas riser tube, mud gas riser tube upper end is connected to triphase separator II chamber, bottom, triphase separator II chamber is an increaser, top, triphase separator I chamber is reducing pipe, bottom, triphase separator I chamber is a gas skirt, be provided with precipitating sludge backflow seam between the increaser of gas skirt and out cylinder lower end, settling chamber, mud gas riser tube joins by horizontal supporting plate and out cylinder, pick out the water baffle under the horizontal supporting plate, the mud gas riser tube outside is provided with the settling chamber.

Described flow lifting type reaction chamber is cylindric, and aspect ratio is 7～10: 1, the cross-sectional area S of flow lifting type reaction chamber ₁With the maximum cross-section area S of settling chamber ₂Ratio be 1: 4～6, with the cross-sectional area S of mud gas riser tube ₃Ratio be 5～7: 1.Settling chamber's volume is 0.5～1.0: 2.4～2.7 with the ratio that overall reactor is amassed, and the out cylinder increaser becomes 50 °～70 ° with the angle α of datum water level, and precipitating sludge backflow kerf spacing is 10～15mm.Angle γ between mud gas riser tube and the triphase separator I chamber reducing pipe is 30 °～50 °, angle β between triphase separator II chamber increaser and the horizontal supporting plate is 40 °～50 °, and gas skirt lower edge, triphase separator I chamber is 4～6: 1～2 to liquid level apart from a and liquid level to the ratio of the distance b of lower edge, triphase separator II chamber.The water outlet baffle is cylindrical, internal diameter 40～70mm, height 40～50mm, liquid level 20～30mm is goed deep in water outlet baffle lower edge, on the water outlet baffle, be higher than liquid level 10～15mm place 1～4 ventilating pit is set, aperture 5～10mm, rising pipe pass settling chamber's out cylinder and water outlet baffle.

Advantage of the present invention: 1) triphase separator of putting is made up of I chamber and II chamber two portions, constitute two-stage (I level, II level) three-phase separating system, can realize effective separation of mud, water, gas, the I chamber is provided with gas skirt, can effectively cover the entire reaction chamber cross-section and certain depth is arranged, can collect well by the biogas that escapes on the reaction chamber, avoid mud and the direct outflow reactor of matrix in the air-flow tail washings, can hold in the reactor and stay high sludge concentration, less with the mud that water outlet is run off, make reactor have very high usefulness and fine water outlet; 2) triphase separator I chamber links to each other with triphase separator II chamber with mud gas riser tube, separate through mud, water, gas, the mud and the water that are brought to triphase separator II chamber can return in the reaction chamber by high potential difference, realize the mud circulation and strengthen substrate degradation, negative impact due to the short stream of alleviation, thereby the steady running of assurance reactor; 3) make full use of the little characteristics of mud gas riser cross-section, make the cross-sectional area maximization of settling region, effectively reduce hydraulic surface loading wherein, the water outlet baffle is set in the settling region simultaneously, the gas of avoiding separating out in the sewage is taken mud out of reactor, the sludge settling effect in reinforced deposition district; 4) the sewage by-pass flow is not subjected to the direct interference of ease biogas on the flow lifting type reaction chamber to the settling region, and the settling region is in relative static conditions, can realize effective separation of mud, water; 5) adopt bigger reactor aspect ratio, make its fluidised form trend plug flow; 6) this reactor has good anaerobic biological treatment performance, can bear high entering organic matter of water concentration, has high volume transformation efficiency and high volume gas producing efficiency.

Description of drawings

Accompanying drawing is the anaerobic biological reactor structural representation; Among the figure: water inlet pipe 1, flow lifting type reaction chamber 2, triphase separator I chamber 3, mud gas riser tube 4, triphase separator II chamber 5, mud backflow seam 6, water outlet baffle 7, ventilating pit 8, rising pipe 9, thief hole 10, settling chamber 11, collecting methane pipe 12, gas skirt 13, horizontal supporting plate 14.

Embodiment

As shown in drawings, anaerobic biological reactor has reactor body, be provided with water inlet pipe 1 and flow lifting type reaction chamber 2 in the reactor body lower end, flow lifting type reaction chamber 2 joins through increaser and settling chamber's 11 out cylinder, be provided with the triphase separator I chamber 3 that is connected in settling chamber's 11 out cylinder, mud gas riser tube 4, mud gas riser tube 4 upper ends are connected to triphase separator II

chamber

5,5 bottoms, triphase separator II chamber are increaser, 3 tops, triphase separator I chamber are reducing pipe, 3 bottoms, triphase separator I chamber are gas skirt 13, be provided with precipitating sludge backflow seam 6 between the increaser of gas skirt and 11 out cylinder lower ends, settling chamber, mud gas riser tube 4 joins by horizontal supporting plate 14 and out cylinder, horizontal supporting plate picks out water baffle 7 14 times, and mud gas riser tube 4 outsides are provided with settling chamber 11.

Flow lifting type reaction chamber 2 is cylindric, and aspect ratio is 7～10: 1, the cross-sectional area S of flow lifting type reaction chamber 2 ₁With the 11 the maximum cross-section area S of settling chamber ₂Ratio be 1: 4～6, with the cross-sectional area S of mud gas riser tube 4 ₃Ratio be 5～7: 1.Settling chamber's 11 volumes are 0.5～1.0: 2.4～2.7 with the ratio that overall reactor is amassed, and the out cylinder increaser becomes 50 °～70 ° with the angle α of datum water level, and precipitating sludge refluxes and stitches 6 spacings is 10～15mm.Angle γ between mud gas riser tube 4 and triphase separator I chamber 3 reducing pipes is 30 °～50 °, angle β between triphase separator II chamber 5 increasers and the horizontal supporting plate is 40 °～50 °, and 3 gas skirt lower edges, triphase separator I chamber are 4～6: 1～2 to liquid level apart from a and liquid level to the ratio of the distance b of 5 lower edges, triphase separator II chamber.Water outlet baffle 7 is cylindrical, internal diameter 40～70mm, height 40～50mm, liquid level 20～30mm is goed deep in water outlet baffle 7 lower edges, on water outlet baffle 7, be higher than liquid level 10～15mm place 1～4 ventilating pit 8 is set, aperture 5～10mm, rising pipe 9 pass settling chamber's 11 out cylinder and water outlet baffle 7.

But anaerobic biological reactor synthetic glass and steel plate make up, and the settling chamber is positioned at the top of flow lifting type reaction chamber; Triphase separator is made up of I chamber, II chamber, the I chamber be positioned at the settling chamber among, the II chamber is positioned on the settling chamber, the I chamber is connected by mud gas riser tube with the II chamber and forms an entity.Seed sludge can add in the flow lifting type reaction chamber by triphase separator II chamber.Waste water is plug flow and enters the flow lifting type reaction chamber by the bottom water inlet pipe, in the flow lifting type reaction chamber, react, produce biogas, be carried into the mud mixture on top by biogas, gas skirt by triphase separator I chamber is collected, and realizes mud, water, the triphasic first step separation of gas in triphase separator I chamber; Contraction and expansionary effect by mud gas riser tube, realize mud, water, gas triphasic second stage separation in triphase separator II chamber, separated mud mixture returns in the reaction chamber through mud gas riser tube, the circulation of realization mud, keep high sludge concentration, and the reinforcement substrate degradation, the negative impact due to the alleviation weak point flows, thereby the steady running of assurance reactor.After sewage is handled, reflux the seam by-pass flow to the settling region through mud in the flow lifting type reaction chamber, by the barrier effect of baffle, can reduce mud and run off with water outlet, precipitating sludge relies on gravity to return the flow lifting type reaction chamber from mud backflow seam.Draw by rising pipe in the cylinder that water outlet surrounds from baffle.

Claims

1. anaerobic biological reactor, it is characterized in that: it has reactor body, be provided with water inlet pipe (1) and flow lifting type reaction chamber (2) in the reactor body lower end, flow lifting type reaction chamber (2) joins through increaser and settling chamber (11) out cylinder, be provided with the triphase separator I chamber (3) that is connected in settling chamber (11) out cylinder, mud gas riser tube (4), mud gas riser tube (4) upper end is connected to triphase separator II chamber (5), bottom, triphase separator II chamber (5) is an increaser, top, triphase separator I chamber (3) is reducing pipe, bottom, triphase separator I chamber (3) is gas skirt (13), be provided with precipitating sludge backflow seam (6) between the increaser of gas skirt and settling chamber (11) out cylinder lower end, mud gas riser tube (4) joins by horizontal supporting plate (14) and out cylinder, pick out water baffle (7) under the horizontal supporting plate (14), mud gas riser tube (4) outside is provided with settling chamber (11).

2. a kind of anaerobic biological reactor according to claim 1 is characterized in that: described flow lifting type reaction chamber (2) is cylindric, and aspect ratio is 7～10: 1, the cross-sectional area S of flow lifting type reaction chamber (2) ₁With the maximum cross-section area S of settling chamber (11) ₂Ratio be 1: 4～6, with the cross-sectional area S of mud gas riser tube (4) ₃Ratio be 5～7: 1.

3. a kind of anaerobic biological reactor according to claim 1, it is characterized in that: the long-pending ratio of described settling chamber (11) volume and overall reactor is 0.5～1.0: 2.4～2.7, the out cylinder increaser becomes 50 °～70 ° with the angle α of datum water level, and precipitating sludge refluxes and stitches (6) spacing is 10～15mm.

4. a kind of anaerobic biological reactor according to claim 1, it is characterized in that: the angle γ between described mud gas riser tube (4) and triphase separator I chamber (3) reducing pipe is 30 °～50 °, angle β between triphase separator II chamber (5) increaser and the horizontal supporting plate (14) is 40 °～50 °, and gas skirt lower edge, triphase separator I chamber (3) is 4～6: 1～2 to liquid level apart from a and liquid level to the ratio of the distance b of lower edge, triphase separator II chamber (5).

5. a kind of anaerobic biological reactor according to claim 1, it is characterized in that: described water outlet baffle (7) is cylindrical, internal diameter 40～70mm, height 40～50mm, liquid level 20～30mm is goed deep in water outlet baffle (7) lower edge, be higher than liquid level 10～15mm place on water outlet baffle (7) 1～4 ventilating pit (8) is set, aperture 5～10mm, rising pipe (9) pass settling chamber's (11) out cylinder and water outlet baffle (7).