CN203007037U

CN203007037U - Internal mixing anaerobic reactor

Info

Publication number: CN203007037U
Application number: CN2013200021691U
Authority: CN
Inventors: 许中华
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-05
Filing date: 2013-01-05
Publication date: 2013-06-19
Anticipated expiration: 2023-01-05

Abstract

The utility model provides an internal mixing anaerobic reactor. The reactor body is cylindrical; a taper sludge expansion zone, a reaction zone, a gas-solid-liquid separating zone, and a sediment separation discharge zone are sequentially arranged inside the reactor body from bottom to top; the taper sludge expansion zone is a taper cover; an effluent weir is arranged above the sediment separation discharge zone; an automatic backflow system is arranged at the top of the reactor body; the automatic backflow system comprises an air-lift pipe, a gas-water separating tank and a return pipe; the air-lift pipe is connected with the gas-water separating tank; the return pipe extends to the bottom of the reaction zone; a methane pipe is connected between the gas-water separating tank and the gas-solid-liquid separating zone; and a methane circulating pipe is connected between the gas-water separating tank and a water distributing pipe. The internal mixing anaerobic reactor has the advantages that in the height of the reactor body is low, flocculent sludge can be started quickly, impact resistance load is strong, requirement on the inlet water PH value is low, granule sludge is increased quickly, processing energy consumption is low, processing efficiency is high, and outlet water quality is high. The internal mixing anaerobic reactor is simple to operate, convenient to run, and suitable for treatment of organic pollutants with various concentrations.

Description

Interior mixing anaerobic retort

Technical field

The utility model relates to a kind of anaerobic reaction device of processing the biochemical treatment stage for industrial sewage, belongs to the anaerobic reaction technical field.

Background technology

The various anaerobic reactors that present stage is used can classify as high, medium and low fast reactor.Height is less than 10 meters, and the anaerobic reactor of upflow velocity between 0.5-1.0 m/h classifies as the middling speed anaerobic reactor, and middling speed anaerobic reactor COD volumetric loading can be used floc sludge usually less than 5kgCOD.m3.d during start-up and operation.The intermediate reactor floor space is moderate, reduced investment, and operation is convenient, but shortcoming is to be suitable for high density water quality and can biochemical poor sewage, and the anaerobic sludge of system easily runs off.The IC of high-rate anaerobic reactor take granule sludge reaction bed system as characteristics is as representative, its HRT(hydraulic detention time) short, volumetric loading is high, usually the COD volumetric loading is greater than 5kgCOD.m3.d, but start-up and operation must use granule sludge, more than aspect ratio requires 2:1 usually, more than upflow velocity requires 1m/h, and the granule sludge poor growth needs often to replenish fresh granule sludge.

Summary of the invention

The utility model provides for having the particularly deficiency of conventional IC anaerobic technology existence of anaerobic biological reactor now the interior mixing anaerobic retort that a kind of capacity of resisting impact load is high, the tank body height is low, energy consumption is low, available cotton-shaped anaerobic sludge starts and Granular sludge formation is fast, growth is fast.

Interior mixing anaerobic retort of the present utility model, adopt following technical proposals:

this retort comprises tank body, and tank body is column, and aspect ratio is 1:1.5-1:2, is disposed with from bottom to top taper sludge bulking district, reaction zone, gas-solid-liquid disengaging zone and precipitate and separate exhalant region in tank body, taper sludge bulking district is a cone-shaped hood, gas-solid-liquid is provided with triphase separator in the disengaging zone, the top of precipitate and separate exhalant region is provided with effluent weir, effluent weir is provided with rising pipe, the top of tank body is provided with the automatic back flow system, this automatic back flow system comprises stripping tube, gas water separation tank and return line, stripping tube one end is connected with taper sludge bulking district, one end is connected with gas water separation tank, return line one end is connected with gas water separation tank, one end extend into the reaction zone bottom, be connected with the biogas pipe between gas water separation tank and gas-solid-liquid disengaging zone, be connected with the biogas recirculation pipe between gas water separation tank and water distributor, the bottom of tank body is provided with the water distributor that stretches in taper sludge bulking district, the bottom of tank body also is provided with shore pipe, be provided with mud valve on shore pipe.

during operation, waste water enters taper sludge bulking district from water distributor, enter biogas by the biogas recirculation pipe racks simultaneously, under the effect of ambient pressure, gas-solid-liquid arrives gas water separation tank along stripping tube, air release in gas water separation tank, water and mud return to again the reaction zone bottom along return line under action of gravitation, again form gas-solid-liquid in reaction zone, then rise to together the gas-solid-liquid disengaging zone, and separate by realizing gas-solid-liquid at this, it is external that clear liquid is discharged the pond through effluent weir, mud is sedimentation at the bottom of the pond under action of gravitation, biogas enters gas water separation tank along the biogas pipe.The granule sludge that the pond body produces is regularly discharged outside the pond through shore pipe.

The utlity model has that the tank body height is low, floc sludge starts fast, the ability of anti impulsion load is strong, the water inlet pH value requires loose, granule sludge increases fast, process the low advantage of energy consumption, and processing efficiency is high, and stable effluent quality is applicable to the processing of various concentration organic pollutants, simple to operate, operation is convenient.

Description of drawings

Accompanying drawing is the structural representation of mixing anaerobic retort in the utility model

In figure: 1, tank body, 2, taper sludge bulking district, 3, reaction zone, 4, gas-solid-liquid disengaging zone, 5, precipitate and separate exhalant region, 6, gas water separation tank, 7, effluent weir, 8, water distributor, 9, shore pipe, 10, return line, 11, stripping tube, 12, the biogas recirculation pipe, 13, biogas pipe, 14, rising pipe.

Embodiment

As shown in drawings, interior mixing anaerobic retort of the present utility model mainly comprises columnar tank 1, and the tank body aspect ratio is 1:1.5-1:2, and tank body 1 adopts steel construction, and whole structures are column, are a multizone, multi-functional combination.Be disposed with from bottom to top taper sludge bulking district 2, reaction zone 3, gas-solid-liquid disengaging zone 4 and precipitate and separate exhalant region 5 in tank body 1.Taper sludge bulking district 2 is a cone-shaped hood.Be provided with triphase separator in gas-solid-liquid disengaging zone 4.The top of precipitate and separate exhalant region 5 is provided with effluent weir 7, and effluent weir 7 is provided with rising pipe 14.The top of tank body 1 is provided with the automatic back flow system, this automatic back flow system comprises stripping tube 11, gas water separation tank 6 and return line 10, stripping tube 11 1 ends are connected with gas water separation tank 6, one end is connected with taper sludge bulking district 2, stripping tube 11 is promoted to gas water separation tank 6 with high concentration sludge and the hc effluent mixed solutions in taper sludge bulking district 2, by efficient mass transfer, reach the purpose of granule sludge Fast Growth.Return line 10 1 ends are connected with gas water separation tank 6, and an end extend into the bottom of reaction zone 3, and the muddy water after separation flows back to reaction zone 3 certainly through return line 10.The bottom of tank body 1 is provided with the water distributor 8 that stretches in taper sludge bulking district 2, and water distributor 8 is provided with water intaking valve.The bottom of tank body 1 also is provided with shore pipe 9, is provided with mud valve on shore pipe 9, opens control valve during spoil disposal, by self-pressure, pool bottom sludge is discharged.

Be connected with biogas pipe 13 between gas water separation tank 6 and gas-solid-liquid disengaging zone 4, the biogas in reaction zone 3 is introduced gas water separation tank 6, then discharge by gas water separation tank 6.Be connected with biogas recirculation pipe 12 between gas water separation tank 6 and water distributor 8, biogas is introduced taper sludge bulking district 2, by the circulation of biogas, make in taper sludge bulking district 2 and form density difference with the external world all the time, guarantee to carry out continuously air lift.

The operational process of above-mentioned interior mixing anaerobic retort is:

waste water enters taper sludge bulking district 2 from water distributor 8, by biogas recirculation pipe 12, biogas is brought into simultaneously, make taper sludge bulking district's 2 interior water-mass densities reductions, so gas-solid-liquid arrives gas water separation tank 6 along stripping tube 11 under the effect of ambient pressure, at the interior air release of gas water separation tank 6, water and mud return to again reaction zone 3 bottoms along return line 10 under action of gravitation, still exist anerobe to organic degraded in reaction zone 3, produce simultaneously biogas, again form gas-solid-liquid, then rise to together gas-solid-liquid disengaging zone 4, and realize that by triphase separator gas-solid-liquid separates at this, clear liquid through the settling region 5 and effluent weir 7 to discharge the pond along water shoot 14 external, mud is sedimentation at the bottom of the pond under action of gravitation, biogas enters gas water separation tank 6 along biogas pipe 13.The granule sludge that pond body 1 produces is regularly discharged outside the pond through shore pipe 9.

Taper sludge bulking district 2 interior sludge concentrations are high, gas production rate is large, the interior sludge concentration of reaction zone 3 is low, form obvious density difference in stripping tube 11 with outside pipe, mixing wastewater with air liquid is promoted to gas water separation tank 6, mixing wastewater with air liquid in reaction zone 3 rises, taper sludge bulking district 2 interior formation negative pressure, and the interior muddy water mixed solution of reaction zone 3 replenishes fast.Taper sludge bulking district 2 makes the place that muddy water mixes fully, mass-transfer efficiency is the highest.At the interior microorganism of reaction zone 3 and the abundant absorption degradation of organic pollutant, it is the highest place of pollutant removal.Gas water separation tank 6 plays the effect that connects taper sludge bulking district 2 and reaction zone 3, purpose is to allow the organic waste water of high density fully contact with microorganism at short notice, for the Fast-propagation of particulate matter provides the sufficient nutrient material, promote biological self reproducing, simultaneously by washing away at a high speed, shear, form active high granule sludge.

The characteristics of above-mentioned interior mixing anaerobic retort are aspect ratio little (1:1.5-1:2), highly generally below 10 meters, reduce promoting energy consumption; The COD volumetric loading is high, more than can reaching 10 kg/m3.d; Available floc sludge starts, and the formation of granule sludge is fast; The flow velocity of reactor bottom water is fast, and mass-transfer efficiency is high, has promoted microorganism to contact and transmission ofenergy with the effective of pollutent; Water distribution manner is avoided the dead angle according to the Design Theory of wall jet mechanics, overcomes the generation of short flow phenomenon; Methane circulating gas-lifting, reinforcing mass transfer efficient.Whole system starts fast, and the production rate of granule sludge is high, efficiently solves in existing anaerobic technique the granule sludge growth slow, needs the problem of often replenishing.

Case history:

Utilize the UASB(upflow anaerobic sludge blanket reactor of a Φ 5.72*7.5 rice) and the interior mixing anaerobic retort of the present invention's (utility model) of same aspect ratio sewage is processed, water quality and load condition are as follows:

UASB: influent COD 12000mg/l, water outlet 3600mg/l, clearance 70%, ph value 5 need add alkali and regulate ph value to 7, water yield 160m3/d, volumetric loading 7.5kg/m3.d.

Interior mixing anaerobic retort: influent COD 12000mg/l, water outlet 400-600mg/l, clearance 95%, the pH value advances 5, does not need plus-minus to regulate, and processes water yield 160m3/d, and volumetric loading reaches 10.2kg/m3.d.

Claims

1. mixing anaerobic retort in a kind, comprise tank body, and it is characterized in that: tank body is column, and aspect ratio is 1:1.5-1:2, is disposed with from bottom to top taper sludge bulking district, reaction zone, gas-solid-liquid disengaging zone and precipitate and separate exhalant region in tank body, taper sludge bulking district is a cone-shaped hood, gas-solid-liquid is provided with triphase separator in the disengaging zone, the top of precipitate and separate exhalant region is provided with effluent weir, effluent weir is provided with rising pipe, the top of tank body is provided with the automatic back flow system, this automatic back flow system comprises stripping tube, gas water separation tank and return line, stripping tube one end is connected with taper sludge bulking district, one end is connected with gas water separation tank, return line one end is connected with gas water separation tank, one end extend into the reaction zone bottom, be connected with the biogas pipe between gas water separation tank and gas-solid-liquid disengaging zone, be connected with the biogas recirculation pipe between gas water separation tank and water distributor, the bottom of tank body is provided with the water distributor that stretches in taper sludge bulking district, the bottom of tank body also is provided with shore pipe, be provided with mud valve on shore pipe.