CN101306874B

CN101306874B - Double-cycling anaerobic reactor

Info

Publication number: CN101306874B
Application number: CN2008100313424A
Authority: CN
Inventors: 陈皓鋆; 陈曙平
Original assignee: YONGXING HAOTIAN ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: YONGXING HAOTIAN ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2008-05-16
Filing date: 2008-05-16
Publication date: 2010-04-14
Anticipated expiration: 2028-05-16
Also published as: CN101306874A

Abstract

The invention discloses a bicirculating anaerobic reactor, which comprises a shell, a lifting pump, a circulating pump, a hydraulic control water seal, and a pipeline value used for connection, wherein, the center of the shell, from inside to outside, is orderly provided with a liquid ascending guide sleeve, a liquid descending guide sleeve and an elastic filler which are concentric or symmetrically deflective; the lower part of the liquid ascending guide sleeve is provided with a water inlet distribution pipe and a methane lifting reflux device which are connected with a sewage lifting pump; the bottom of the liquid descending guide sleeve is provided with a bottom gas ascending cover, the upper part of the liquid descending guide sleeve is provided with a central gas skirt, and an edge gas skirt is arranged at the periphery of the central gas skirt; and the upper part of the central gas skirt, from the bottom up, is orderly provided with an overflow trough and a scum baffle, a water outlet pipe is connected to the overflow trough, and the bottom of the reactor is provided with a sludge collection and reflux space. The reactor adopts an external small flow reflux and internal methane lifting reflux technology, can fully contact strains and anaerobic sludge which are used for treatment at a start initial stage and during the entrance of low-concentration organic wastewater, has shorter starting time of biochemical treatment, can normally operate under the condition of low load, can also ensure that the degradation efficiency of COD in wastewater under the low load and high load is high, and save the energy.

Description

Double-cycling anaerobic reactor

Technical field

The invention belongs to sewage disposal device, specifically be meant a kind of double-cycling anaerobic reactor.

Background technology

Anaerobic reactor plays important effect as the major equipment of sewage disposal in sewage treatment process, anaerobic reactor commonly used has three kinds: UASB, EGSB and IC reactor.The sewage that adopts is the single loop mode in the Recycle design of reactor substantially, the IC reactor is when device start starting stage and low-concentration organic waste water enter, be difficult to fully contact with anaerobic sludge with the bacterial classification of handling usefulness, biochemical treatment is long start time, under the situation of underload, be difficult to normal operation, reactor EGSB circulation power is big, and it is more to take suspended substance out of; The water distribution system complexity of UASB reactor, and short flow phenomenon takes place easily.And make the degradation efficiency of the COD in the waste water lower; Adopt single-cycle mode, guaranteeing essentially identical treatment effect, the height of corresponding requirements reactor is higher, makes the energy of transport process water more, and energy-saving effect is not good.

Summary of the invention

The object of the present invention is to provide the double-cycling anaerobic reactor that a kind of outside low discharge refluxes and inner biogas-lift refluxes, can be when starting starting stage and low-concentration organic waste water and enter, can fully contact with anaerobic sludge with bacterial classification, biochemical treatment is shorter start time, situation at underload can normally be moved, the degradation efficiency that can guarantee the COD in the waste water under underload and high loading again is all higher, save energy.

In order to achieve the above object, double-cycling anaerobic reactor of the present invention, include reactor shell, the hydraulic control water seal that is arranged on the outer sewage pump of housing, reflux cycle pump, biogas and the pipeline valve that is connected usefulness and rising pipe and the spoil disposal return line that links to each other with the reflux cycle pump, be arranged on the intravital filler of shell, the reactor shell center is disposed with rising the liquid guide, falling liquid guide and elastic filler of concentric or symmetrical baffling from the inside to the outside; Be provided with water inlet distribution pipe and the biogas-lift device that links to each other with sewage pump in the bottom that rises the liquid guide; Be provided with the bottom and rise gas hood falling liquid telescopic bottom, be provided with the center gas skirt on the top that falls the liquid guide, the periphery of center gas skirt is the edge gas skirt; Top at the center gas skirt sets gradually spilling water groove and scum board from the bottom to top, and rising pipe is connected on the spilling water groove, is provided with mud in the bottom of reactor and compiles the backflow space.

The biogas-lift device is made up of conduit and non-return valve core, has pore in the conduit stage casing.

In the external hydraulic control water seal that also is provided with biogas of reactor enclosure, the biogas fairlead of hydraulic control water seal inserts the top of center gas skirt and the top edge of edge gas skirt respectively.

The advantage that double-cycling anaerobic reactor of the present invention has:

The binary cycle system that the present invention adopts outside low discharge and inner biogas-lift to reflux, outside low discharge circulation is finished by the reflux cycle pump of exterior arrangement, and circular flow Q16 is less than or equal to inlet water lifting pumps flow Q1.Internal recycling rises gas hood by the bottom and collects the biogas that end section sludge blanket produces, and backs down biogas-lift return channel spool, and mud, water reflux and finishes circulation bottom driving.Outside low discharge refluxes and can guarantee that reactor when starting starting stage and low-concentration organic waste water and enter, can fully contact with anaerobic sludge with bacterial classification, anaerobic biological is handled shortened greatly start time, and the underload bulking sludge can normally move; When water inlet COD load increases, bottom biogas generation also increases thereupon, the backflow of internal recycling system also increases, make high concentrated organic wastewater obtain strong stirring and dilution, and height along with organic loading in the treating water, can regulate internal reflux amount and stirring intensity automatically, thereby guarantee the degradation efficiency of COD in the treating water.The backflow of low discharge is the economized cycle energy effectively.

The present invention adopts the concentric or symmetrical baffling technology of EGSB (expanded granular sludge bed), under situation with suitable EGSB (expanded granular sludge bed) layer length and volume, height than the EGSB reactor can reduce half, corresponding water inlet and external reflux lift can reduce half, and power consumption reduces half than the EGSB reactor.

The present invention adopts the baffling road to hang the ascending manner biological filter of elastic filler, more can tackle under the strong mixing remaining COD in the fine particle mud and treating water effectively, makes the water quality after the processing higher; In space and the baffling structure that reactor bottom is provided with, can stop the generation that bottom, biological filter silt knot blocks effectively.

Description of drawings

Accompanying drawing is the sectional view of double-cycling anaerobic reactor embodiment of the present invention;

Shown in the figure: 1, sewage pump, 2, water inlet distribution pipe, 3, the biogas-lift return channel, 4, elastic filler, 5, rise the liquid guide, 6, fall the liquid guide, 7, reactor shell, 8, the center gas skirt, 9, the edge gas skirt, 10, spilling water groove, 11, rising pipe, 12, scum board, 13, biogas fairlead, 14, the hydraulic control water seal, 15, the spoil disposal return line, 16, reflux cycle pump, 17, the bottom rises gas hood, 18, pore.

Embodiment

Below in conjunction with drawings and Examples the technology of the present invention is described further.

Double-cycling anaerobic reactor as shown in the figure, include reactor shell 7, the spoil disposal return line 15 that is arranged on housing outer sewage pump 1, reflux cycle pump 16 and the pipeline valve that is connected usefulness and rising pipe 11 and links to each other with reflux cycle pump 16, be arranged on the intravital elastic filler 4 of shell, it is characterized in that: reactor shell 7 centers are disposed with concentric or symmetrical baffling from the inside to the outside and rise liquid guide 5, fall liquid guide 6 and filler 7; Be provided with water inlet distribution pipe 2 and the biogas-lift return channel 3 that links to each other with sewage pump 1 in the bottom that rises liquid guide 5; Be provided with the bottom in the bottom that falls liquid sleeve 6 and rise gas hood 17, be provided with center gas skirt 8 on the top that falls liquid guide 6, the periphery of center gas skirt 8 is an edge gas skirt 9; Set gradually spilling water groove 10 and scum board 12 from the bottom to top on the top of center gas skirt 8, rising pipe 11 is connected on the spilling water groove 10, is provided with mud in the bottom of reactor and compiles the backflow space.

Biogas-lift device 3 is made up of conduit and non-return valve core, has pore 18 in the conduit stage casing.

In the external hydraulic control water seal 14 that also is provided with biogas of reactor enclosure, the biogas fairlead of hydraulic control water seal 14 inserts the top of center gas skirt 8 and the top edge of edge gas skirt 9 respectively.

Working process of the present invention is as follows:

As shown in drawings, waste water is taken out by sewage pump 1, after the backflow muddy water of taking out with reflux cycle pump 16 after entering water distributor 2 water distribution uniformities converges, send into and rise liquid guide 5, again with the phegma thorough mixing of biogas-lift device 3 inside after, with bigger lifting flow velocity, flow velocity is greater than 8m/h, enter and rise liquid guide 5, liquid guide 6 and reactor bottom spatial suspended particle sludge bulking bed fall, carry out the biochemical degradation of COD, remove the treating water partial reflux circulation of a large amount of COD, part enters the biological filter that elastic filler is formed, rest COD and fine particle mud are tackled and further degraded, the gap of the treating water of secondary treatment between the center on producer top gas skirt 8 and edge gas skirt 9 enters the settling region of reactor head, and the treating water of post precipitation is through scum board 12, spilling water groove 10 and rising pipe 11 are discharged.

The microbial film that comes off in sedimentary mud of reactor head and the elastic filler 4 is under action of gravity, inclined-plane and filler space through center gas skirt 8 and edge gas skirt 9 sink in the bottom of reactor, again by reflux cycle pump 16 and biogas-lift device 3, turn back to and rise in the liquid guide 5, carry out further circular treatment.

Under the acting in conjunction of recirculation water that reflux cycle pump 16 and biogas-lift return channel 3 carried, gas, mud, granule sludge is expanded and strong stirring fully, when removing in a large number, the COD in the treating water produces a large amount of biogas again, compile separation after biogas fairlead 13 is discharged by hydraulic control water seal 14 again by center gas skirt 8; Another part biogas that produces after the microbial film in the elastic filler 4 is handled compiles separation after biogas fairlead 13 is discharged by hydraulic control water seal 14 again by edge gas skirt 9.

Leave mud in the bottom of reactor and compile the backflow space, the biogas that mud produced wherein, rise gas hood 17 comes together in and rises under liquid guide 5 base plates through the bottom of producer bottom, enter in the conduit through biogas-lift device 3 stage casing pores 18, under the air supporting dynamic action, back down non-return valve core, twitch bottom muddy water simultaneously and enter and rise in the liquid guide 5, form inner gas-liquid and reflux.The COD load is high more in the reactor, and the biogas amount that bottom space produces is big more, and the reflux cycle amount is also big more, and just the internal reflux amount is much larger than external reflux amount Q16 and flooding velocity Q1; But at the reactor start-up initial stage and when handling COD concentration less than the low concentration wastewater of 1000mg/L, outer loop must be set, thereby the present invention adopts the binary cycle system that outside low discharge refluxes and inner biogas-lift refluxes, the working efficiency of assurance equipment under different operating modes.

Claims

1. double-cycling anaerobic reactor, include reactor shell (7), the spoil disposal return line (15) that is arranged on housing outer sewage pump (1), reflux cycle pump (16), hydraulic control water seal (14) and the pipeline valve that is connected usefulness and rising pipe (11) and links to each other with reflux cycle pump (16), be arranged on the intravital elastic filler of shell (4), it is characterized in that: reactor shell (7) center is disposed with from the inside to the outside and concentricly rises liquid guide (5), falls liquid guide (6) and elastic filler (4); Be provided with water inlet distribution pipe (2) and the biogas-lift return channel (3) that links to each other with sewage pump (1) in the bottom that rises liquid guide (5); Be provided with the bottom in the bottom that falls liquid guide (6) and rise gas hood (17), be provided with center gas skirt (8) on the top that falls liquid guide (6), the periphery of center gas skirt (8) is edge gas skirt (9); Set gradually spilling water groove (10) and scum board (12) from the bottom to top on the top of center gas skirt (8), rising pipe (11) is connected on the spilling water groove (10), is provided with mud in the bottom of reactor and compiles the backflow space.

2. according to the described double-cycling anaerobic reactor of claim 1, it is characterized in that: biogas-lift return channel (3) is made up of conduit and non-return valve core, has pore (18) in the conduit stage casing.

3. according to claim 1 or 2 described double-cycling anaerobic reactors, it is characterized in that: the biogas fairlead of hydraulic control water seal (14) inserts the top of center gas skirt (8) and the top edge of edge gas skirt (9) respectively.