CN105439367B - A kind of methanol-to-olefins wastewater treatment equipment and its startup method - Google Patents
A kind of methanol-to-olefins wastewater treatment equipment and its startup method Download PDFInfo
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Abstract
The present invention relates to a kind of methanol-to-olefins wastewater treatment equipment and its start method, including：Oil separator, coagulative precipitation tank, homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulating tank, anaerobism circulating pump, anaerobic reactor, anaerobic effluent tank, anaerobic effluent pump, oxygenator, aerobic circulating pump and aerobic reactor；The startup method of the device comprises the following steps：The first step, sequence starting oil separator, coagulative precipitation tank, homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulating tank, anaerobic effluent tank, anaerobic effluent pump；Second step, sequence starting anaerobism circulating pump, anaerobic reactor, oxygenator；3rd step, sequence starting oxygenator, aerobic circulating pump, aerobic reactor.Methanol-to-olefins wastewater treatment equipment of the present invention and its startup method, the synthesis for realizing MTO waste water are effectively handled, and have the advantages that seed sludge amount is few, the startup time is short, treatment effeciency is high, effluent quality is good, it is easy to accomplish commercial Application.
Description
Technical field
The present invention relates to MTO (methanol-to-olefins) technical field, is specifically a kind of methanol-to-olefins wastewater treatment equipment
And its start method.
Background technology
The low-carbon alkenes such as ethene, propylene are important Organic Chemicals, have ten in modern petroleum and chemical industry
Divide important effect.Traditionally, the source of ethene and propylene is mainly hydrocarbon vapours cracking, and raw material is mainly naphtha.It is near
Nian Lai, oxygenatedchemicals alkene (OTO) technique have reached its maturity, and especially MTO techniques have started large-scale application.
Chemical equation and thermal effect using methanol as waste ethene and propylene should be：
2CH3OH→C2H4+2H2O (△ H=11.72KJ/mol, 427 DEG C)
3CH3OH→C3H6+3H2O (△ H=30.98KJ/mol, 427 DEG C)
Can be seen that methanol to olefins reaction from above reaction equation is high exothermic heat, and generates substantial amounts of water.
Under normal conditions, therefore, for whole MTO techniques, how effectively water accounts for more than half of reaction effluent material gross weight,
Water in reaction effluent material is handled and using just becoming particularly significant.
A kind for the treatment of for reuse method of MTO technology waste water is given in Chinese patent CN102050548B, comprising
Following steps：
1.MTO reactor effluents material with separation tower cooler and isolates high concentration MTO after waste heat boiler recycles heat
Waste water；
2. a pair MTO reactor effluent material continue to cool down, water phase is obtained in knockout tower bottom of towe, is obtained in separation column overhead
To alkene gas；Alkene gas is further purified through overcompression and water washing operations；
3. pair water from knockout tower bottom of towe and water scrubber bottom of towe mutually carries out stripping processing, the water that stripper bottom of towe obtains
It is low concentration MTO water after mutually cooling via bottom of towe heat exchanger；
4. pair low concentration MTO water carries out homogeneous adjusting；
5. the low concentration MTO water pair after homogeneous is adjusted carries out coagulating kinetics；
6. the low concentration MTO water pair after coagulating kinetics carries out aerobic aeration processing；
7. a pair aerobic aeration processing water outlet carries out precipitation process；
8. pair precipitation process water outlet carries out flocculation filtration processing.
Although the patent gives the generation process of high concentration MTO waste water and the generation of low concentration MTO water and treats
Journey, but the patent fails especially to be considered for the processing of high concentration MTO waste water.
A kind of processing method of methanol-to-olefins high concentration technique waste water is given in Chinese patent CN102442744B,
MTO high concentrations technique waste water uses the process flow and phase that homogeneous adjusting-oil removal coagulating sedimentation-stripping-anaerobism-precipitates afterwards
After answering condition to be handled, the COD of waste water can be down to below 500mg/L from 50000mg/L or so, removal rate reach 99% with
On.Although the patent can obtain preferable treatment effect, the deficiencies in the prior art are limited to, which is difficult to low concentration
MTO waste water, which is combined, to be accounted for.
A kind of processing method of high concentration methanol olefin process waste water is given in Chinese patent CN102442745A, it is high
The process flow and phase that concentration MTO technique waste waters precipitate after homogeneous adjusting-oil removal coagulating sedimentation-efficient anaerobic-successively
After answering condition to be handled, the COD of waste water can be down to below 2000mg/L from 50000mg/L or so, removal rate reach 95% with
On.It is the same with Chinese patent CN102442744B, it is limited to the deficiencies in the prior art, which is difficult to close low concentration MTO waste water
And get up to account for.
Be not difficult to find out by above description, the prior art high concentration MTO waste water and low concentration MTO waste water separate into
Row processing, this is because being handled after MTO waste water is combined using the prior art in technical feasibility or economic conjunction
Exist in rationality and restrict.
The content of the invention
For defect existing in the prior art, it is an object of the invention to provide a kind of methanol-to-olefins wastewater treatment dress
Put and its start method, the synthesis for realizing MTO waste water is effectively handled, with seed sludge amount is few, the startup time is short, processing effect
The advantages that rate is high, effluent quality is good, it is easy to accomplish commercial Application.
To achieve the above objectives, the present invention adopts the technical scheme that：
A kind of methanol-to-olefins wastewater treatment equipment, it is characterised in that including：Oil separator, coagulative precipitation tank, homogeneous pond,
Homogeneous pond water outlet pump, flotation tank, anaerobism circulating tank, anaerobism circulating pump, anaerobic reactor, anaerobic effluent tank, anaerobic effluent are pumped, filled
Oxygen device, aerobic circulating pump and aerobic reactor；
Oil separator, coagulative precipitation tank, homogeneous pond are sequentially connected by pipeline,
Connected between homogeneous pond and flotation tank by the pipeline equipped with homogeneous pond water outlet pump,
Flotation tank is connected respectively to anaerobism circulating tank, anaerobic effluent tank by pipeline,
It is equipped between anaerobism circulating tank, anaerobic effluent tank and connects the pipeline of the two,
Anaerobism circulating tank is connected to anaerobic reactor by the pipeline equipped with anaerobism circulating pump,
Anaerobic reactor is connected directly to anaerobism circulating tank by single pipeline,
Anaerobic reactor is connected to oxygenator by pipeline,
Anaerobic effluent tank by being connected to oxygenator equipped with the pipeline that anaerobic effluent pumps,
Branch drain is additionally provided with the pipeline equipped with anaerobic effluent pump,
The reflux water out of oxygenator is connected to aerobic reactor by the pipeline equipped with aerobic circulating pump,
It is equipped between oxygenator and anaerobism circulating tank and connects the pipeline of the two,
It is equipped between oxygenator and aerobic reactor and connects the pipeline of the two.
Based on the above technical solutions, homogeneous pond water outlet pump uses centrifugal pump.
Based on the above technical solutions, the anaerobism circulating tank uses Storage Tank.
Based on the above technical solutions, the anaerobism circulating pump uses centrifugal pump.
Based on the above technical solutions, the anaerobic reactor is equipped with air water distribution area 101, fills out successively from bottom to up
Expect area 102 and exhalant region 103, wherein：
Air water distribution is equipped with supporting layer, water distributor 104 and gas pipe 105 in area；
Three phase separator 108, catch basin 106 and effluent weir 107 are equipped with exhalant region.
Based on the above technical solutions, water distributor 104 is located at supporting layer low inside and puts, and is used for realization anaerobic reaction
Device water inlet evenly distributes, using perforated tube water distributor,
Gas pipe 105 is located at supporting layer internal upper part position, is used for realization evenly distributing for anaerobic reactor air inlet, using wearing
Hole tubular type gas pipe,
Supporting layer has the function of to support filler, further evenly distributes aqueous vapor etc., using gravel or porcelain ball, supporting layer particle diameter
For 3~25mm, supporting layer uses 2~3 grades of gradings,
Packing layer is located on supporting layer, is the main place for carrying out anaerobic organism reaction, and filler uses walnut shell, filler
Particle diameter is 1.5~3mm, and in operating status, the expansion rate of packing layer is 5~50%,
Exhalant region should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, in addition also
Realize the collection of biogas, while use and expand exhalant region diameter, filtering is used using three phase separator and in catch basin
The integrated approach of measure meets the functional requirement of exhalant region.
Based on the above technical solutions, the anaerobic effluent tank uses Storage Tank.
Based on the above technical solutions, the anaerobic effluent pump uses centrifugal pump.
Based on the above technical solutions, the oxygenator uses vertical structure.
Based on the above technical solutions, the aerobic circulating pump uses centrifugal pump.
Based on the above technical solutions, the aerobic reactor is mainly by water distributor, gas pipe, supporting layer, filler
Layer and Disengagement zone composition, wherein：
Water distributor is used for realization evenly distributing for aerobic reactor water inlet, using perforated tube water distributor,
Gas pipe is used for realization evenly distributing for aerobic reactor air inlet, using perforated tube gas pipe,
Supporting layer has the function of to support filler, further evenly distributes aqueous vapor etc., using gravel or porcelain ball；Supporting layer particle diameter
For 3~25mm；Supporting layer uses 2~3 grades of gradings；
Packing layer is the main place for carrying out aerobe reaction, using walnut shell；Packing material size is 1.5~3mm；
In operating status, the expansion rate of packing layer is 0.5~50%；
Disengagement zone should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, adopt at the same time
Meet the functional requirement of Disengagement zone with expansion Disengagement zone diameter and using the integrated approach of filtering measure.
Based on the above technical solutions, the startup method of the device comprises the following steps：
The first step, sequence starting oil separator, coagulative precipitation tank, homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulation
Tank, anaerobic effluent tank, anaerobic effluent pump；
Second step, sequence starting anaerobism circulating pump, anaerobic reactor, oxygenator；
3rd step, sequence starting oxygenator, aerobic circulating pump, aerobic reactor.
Based on the above technical solutions, in the first step, as the MTO waste water of oil separator water, its COD for 300~
2000mg/L, suspension content are 50~300mg/L；
Oil separator water outlet gravity flow enters coagulative precipitation tank, and it is 30~150mg/L that coagulative precipitation tank, which goes out water suspension content,；
Coagulative precipitation tank water outlet gravity flow enters homogeneous pond, and water outlet COD in homogeneous pond is 500~1500mg/L, suspension content
Less than 100mg/L；
The water outlet of homogeneous pond is pumped into flotation tank by the water outlet of homogeneous pond, and flotation tank goes out water suspension content and is less than 80mg/L；
Flotation tank water outlet gravity flow enters anaerobism circulating tank, and enters anaerobic effluent tank through the gravity flow of anaerobism circulating tank；
The water outlet of anaerobic effluent tank is pumped toward follow up device by anaerobic effluent and is further processed.
Based on the above technical solutions, in second step, after the start-up course of the first step, anaerobism circulation is opened
Pump, send the waste water in anaerobism circulating tank into anaerobic reactor, anaerobic reactor water outlet gravity flow enters oxygenator；
Oxygenator is opened, oxygenator water outlet gravity flow enters anaerobism circulating tank；
Add a small amount of activated sludge in toward oxygenator, the initial concentration of seed sludge may be controlled to 50 in anaerobic reactor
~500mg/L；
It is 1~4kgCOD/ (m to control water inlet volumetric loading of the anaerobic reactor under aerobic state3D), filler is promoted
Layer rapid biofilm,
When dischargeable capacity load of the anaerobic reactor under aerobic state is 0.5~3kgCOD/ (m3When d), it will flow automatically
Anaerobic reactor water outlet to oxygenator all switches to anaerobism circulating tank, and oxygenator temporarily disables,
Hereafter, anaerobic reactor is changed into anaerobic state by aerobic state, controls the COD loads and progressively of anaerobic reactor
Its effective COD load is lifted, when the effective COD loads of anaerobic reactor are close to design load, anaerobic reactor start-up course terminates.
Based on the above technical solutions, the Anaerobic Treatment COD Payloads suggestion used is designed as 2~10kgCOD/
(m3·d)。
Based on the above technical solutions, in the 3rd step, when the effective COD loads of anaerobic reactor are close to design load,
Anaerobic effluent is pumped into whole water outlets and is sent into oxygenators, opens oxygenator, opens aerobic circulating pump, waste water after aerobic reactor from
Stream enters oxygenator, and wherein most waste water is circulated after oxygenation by aerobic circulating pump, remaining waste water then overflow discharge,
When the effective COD loads of aerobic reactor are close to design load, aerobic reactor start-up course terminates.
Based on the above technical solutions, design the Aerobic Process for Treatment COD Payloads suggestion that uses for 0.5~
3.5kgCOD/(m3·d)。
Methanol-to-olefins wastewater treatment equipment of the present invention and its startup method, the synthesis for realizing MTO waste water have
Effect processing, has the advantages that seed sludge amount is few, the startup time is short, treatment effeciency is high, effluent quality is good, it is easy to accomplish industry should
With.
Brief description of the drawings
The present invention has drawings described below：
Fig. 1 MTO wastewater treatment equipment flow diagrams,
Fig. 2 Bio-Pretreatment device Booting sequence schematic diagrames,
Fig. 3 anaerobic reactor Booting sequences schematic diagram (aerobic biofilm stage),
Fig. 4 anaerobic reactor Booting sequences schematic diagram (anaerobism biofilm stage),
Fig. 5 aerobic reactor Booting sequence schematic diagrames,
The structure diagram of Fig. 6 anaerobic reactors.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing.
As shown in Figure 1, methanol-to-olefins wastewater treatment equipment of the present invention, including：Oil separator, coagulative precipitation tank,
Homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulating tank, anaerobism circulating pump, anaerobic reactor, anaerobic effluent tank, anaerobism go out
Water pump, oxygenator, aerobic circulating pump and aerobic reactor；
Oil separator, coagulative precipitation tank, homogeneous pond are sequentially connected by pipeline,
Connected between homogeneous pond and flotation tank by the pipeline equipped with homogeneous pond water outlet pump,
Flotation tank is connected respectively to anaerobism circulating tank, anaerobic effluent tank by pipeline,
It is equipped between anaerobism circulating tank, anaerobic effluent tank and connects the pipeline of the two,
Anaerobism circulating tank is connected to anaerobic reactor by the pipeline equipped with anaerobism circulating pump,
Anaerobic reactor is connected directly to anaerobism circulating tank by single pipeline,
Anaerobic reactor is connected to oxygenator by pipeline,
Anaerobic effluent tank by being connected to oxygenator equipped with the pipeline that anaerobic effluent pumps,
Branch drain is additionally provided with the pipeline equipped with anaerobic effluent pump,
The reflux water out of oxygenator is connected to aerobic reactor by the pipeline equipped with aerobic circulating pump,
It is equipped between oxygenator and anaerobism circulating tank and connects the pipeline of the two,
It is equipped between oxygenator and aerobic reactor and connects the pipeline of the two.
Based on the above technical solutions, homogeneous pond water outlet pump uses centrifugal pump.
Based on the above technical solutions, the anaerobism circulating tank uses Storage Tank.
Based on the above technical solutions, the anaerobism circulating pump uses centrifugal pump.
Based on the above technical solutions, as shown in fig. 6, the anaerobic reactor is from bottom to up successively equipped with air water point
With area 101, packing area 102 and exhalant region 103, wherein：
Air water distribution is equipped with supporting layer, water distributor 104 and gas pipe 105 in area；
Three phase separator 108, catch basin 106 and effluent weir 107 are equipped with exhalant region.
Air water distribution area, the concrete structure of exhalant region can be implemented by the prior art, no longer be described in detail.
Based on the above technical solutions, water distributor 104 is located at supporting layer low inside and puts, and is used for realization anaerobic reaction
Device water inlet evenly distributes, it is proposed that using perforated tube water distributor, the perforated tube water distributor preferably with branched pipe；
Gas pipe 105 is located at supporting layer internal upper part position, is used for realization evenly distributing for anaerobic reactor air inlet, it is proposed that adopt
With perforated tube gas pipe, the perforated tube gas pipe preferably with branched pipe；
Supporting layer has the function of to support filler, further evenly distributes aqueous vapor etc., it is proposed that using gravel or porcelain ball, preferably porcelain
Ball；The suggestion of supporting layer particle diameter is 3~25mm, preferably 4~25mm；Supporting layer is proposed with 2~3 grades of gradings, preferably 3 grades of gradings；
Packing layer is located on supporting layer, is the main place for carrying out anaerobic organism reaction, and filler is proposed with walnut shell,
Preferably through the walnut shell of polishing；Packing material size suggestion is 1.5~3mm, is preferably 2~3mm；In operating status, packing layer
Expansion rate suggestion is 5~50%, preferably 10~45%；
Exhalant region should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, in addition also
Realize the collection of biogas, it is proposed that while used using expansion exhalant region diameter, using three phase separator and in catch basin
The integrated approach of filtering measure meets the functional requirement of exhalant region.
Based on the above technical solutions, the anaerobic effluent tank uses Storage Tank.
Based on the above technical solutions, the anaerobic effluent pump uses centrifugal pump.
Based on the above technical solutions, the oxygenator uses vertical structure.
Based on the above technical solutions, the aerobic circulating pump uses centrifugal pump.
Based on the above technical solutions, the aerobic reactor is mainly by water distributor, gas pipe, supporting layer, filler
Layer and Disengagement zone composition, wherein：
Water distributor is used for realization evenly distributing for aerobic reactor water inlet, it is proposed that using perforated tube water distributor, preferably band
There is the perforated tube water distributor of branched pipe；
Gas pipe is used for realization evenly distributing for aerobic reactor air inlet, it is proposed that using perforated tube gas pipe, preferably band
There is the perforated tube gas pipe of branched pipe；
Supporting layer has the function of to support filler, further evenly distributes aqueous vapor etc., it is proposed that using gravel or porcelain ball, preferably porcelain
Ball；The suggestion of supporting layer particle diameter is 3~25mm, preferably 4~25mm；Supporting layer is proposed with 2~3 grades of gradings, preferably 3 grades of gradings；
Packing layer is the main place for carrying out aerobe reaction, it is proposed that using walnut shell, preferably through the walnut of polishing
Shell；Packing material size suggestion is 1.5~3mm, is preferably 2~3mm；
In operating status, the expansion rate suggestion of packing layer is 0.5~50%, preferably 5~45%；
Disengagement zone should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, it is proposed that same
Shi Caiyong expands Disengagement zone diameter and meets the functional requirement of Disengagement zone using the integrated approach of filtering measure.
Device as described above, the startup method of the device comprise the following steps：
The first step, sequence starting oil separator, coagulative precipitation tank, homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulation
Tank, anaerobic effluent tank, anaerobic effluent pump；
Second step, sequence starting anaerobism circulating pump, anaerobic reactor, oxygenator；
3rd step, sequence starting oxygenator, aerobic circulating pump, aerobic reactor.
Based on the above technical solutions, as shown in Fig. 2, the first step is biological pretreating device Booting sequence, first
In step, as the MTO waste water of oil separator water, its COD is 300~2000mg/L, suspension content is 50~300mg/L.
MTO waste water suggests being 0.1~0.6h, preferably 0.2~0.5h in the residence time of oil separator.Oil slick uses routine side
Method is further disposed.
Oil separator water outlet gravity flow enters coagulative precipitation tank, and it is 30~150mg/L that coagulative precipitation tank, which goes out water suspension content,.
Waste water suggests being 1~6h, preferably 2~5h in the residence time of coagulative precipitation tank.Coagulant is proposed with polymerization chlorine
Change aluminium, flocculant is proposed with anion-polyacrylamide.Sediment is further disposed using conventional method.
Coagulative precipitation tank water outlet gravity flow enters homogeneous pond, and water outlet COD in homogeneous pond is 500~1500mg/L, suspension content
Less than 100mg/L.
Residence time of the waste water in homogeneous pond suggests being 12~48h, preferably 24~36h.
The water outlet of homogeneous pond is pumped into flotation tank by the water outlet of homogeneous pond, and flotation tank goes out water suspension content and is less than 80mg/L.
Coagulant in flotation tank is proposed with aluminium polychloride, and flocculant is proposed with anion-polyacrylamide.
Scum silica frost is further disposed using conventional method.
Flotation tank water outlet gravity flow enters anaerobism circulating tank, and enters anaerobic effluent tank through the gravity flow of anaerobism circulating tank.
The water outlet of anaerobic effluent tank is pumped toward follow up device by anaerobic effluent and is further processed.
Based on the above technical solutions, as shown in Figure 3,4, second step is anaerobic reactor Booting sequence, specifically may be used
It is divided into aerobic biofilm stage and anaerobism biofilm stage, in second step, after the start-up course of the first step, opens anaerobism circulation
Pump, send the waste water in anaerobism circulating tank into anaerobic reactor, anaerobic reactor water outlet gravity flow enters oxygenator.
Oxygenator is opened, oxygenator water outlet gravity flow enters anaerobism circulating tank.
Add a small amount of activated sludge in toward oxygenator, the initial concentration of seed sludge may be controlled to 50 in anaerobic reactor
~500mg/L, preferably 100~400mg/L.
The water inlet volumetric loading for controlling anaerobic reactor (preferably oxygen condition at this time) is 1~4kgCOD/ (m3D), preferably
1.5~3.5kgCOD/ (m3D), packing layer rapid biofilm is promoted.
When the dischargeable capacity load of anaerobic reactor (preferably oxygen condition at this time) is 0.5~3kgCOD/ (m3D), preferably 1
~2kgCOD/ (m3When d), the anaerobic reactor water outlet for flowing to oxygenator certainly is all switched into anaerobism circulating tank, oxygenator
Temporarily disable (referring to Fig. 4).
Hereafter, anaerobic reactor is changed into anaerobic state by aerobic state, controls the COD loads and progressively of anaerobic reactor
Its effective COD load is lifted, when the effective COD loads of anaerobic reactor are close to design load, anaerobic reactor start-up course terminates.
The Anaerobic Treatment COD Payloads suggestion used is designed as 2~10kgCOD/ (m3D), be preferably 4~
8kgCOD/(m3·d)。
Based on the above technical solutions, as shown in figure 5, the 3rd step is aerobic reactor Booting sequence, in the 3rd step,
When the effective COD loads of anaerobic reactor are close to design load, anaerobic effluent is pumped into whole water outlets and is sent into oxygenator, opens oxygenation
Device, opens aerobic circulating pump, and waste water flows automatically after aerobic reactor enters oxygenator, and wherein most waste water passes through after oxygenation
Aerobic circulating pump is circulated, remaining waste water then overflow discharge.
When the effective COD loads of aerobic reactor are close to design load, aerobic reactor start-up course terminates.
The Aerobic Process for Treatment COD Payloads suggestion used is designed as 0.5~3.5kgCOD/ (m3D), be preferably 1~
3kgCOD/(m3·d)。
The creativeness of the present invention is mainly reflected in the following aspects：
First, with the improvement of MTO technologies, its waste water quality is also constantly improving, and the invention discloses a kind of new
MTO waste water qualities, so as to provide basis for the exploitation of specific aim stronger wastewater treatment method.
Second, the invention discloses a kind of new anaerobic reactor and a kind of new aerobic reactor, especially instead
Bio-carrier used in device is answered to have no report among open source information.
3rd, the present invention discloses a kind of combined treatment process of anaerobic reactor and aerobic reactor for MTO waste water.
MTO waste water CODs are 500~1500mg/L, good biodegradability, and the present invention creatively proposes efficient anaerobic+high-efficiency aerobic
Group technology, in view of existing Anaerobic Microbiological Treatment Technology is difficult in adapt to the relatively low situation of MTO waste water CODs, thus the present invention into
One step discloses a kind of new and effective anaerobic bio-treated process, it is possible to achieve the efficient anaerobic processing of MTO waste water；In addition,
In order to be coordinated with follow-up high-efficiency aerobic technique, the invention also discloses anaerobic reactor and the optimization bar of aerobic reactor
Part, can obtain preferable effluent quality.
4th, the invention discloses a kind of quick start method of bioreactor, this method make full use of efficient anaerobic+
The advantage of high-efficiency aerobic group technology realizes that the quick of reactor starts, and anaerobic reaction is realized especially with aerobic biofilm
The quick of device starts (containing optimal conditions) and realizes that the quick of aerobic reactor starts the (bar containing optimization using anaerobic effluent
Part) there is novelty, have the advantages that seed sludge amount is few, it is short to start the time.
It is embodiment below.
Embodiment 1
The COD of MTO waste water is 1000~1200mg/L, suspension content is 50~200mg/L.Coagulative precipitation tank water outlet is hanged
Float content is 30~100mg/L.Water outlet COD in homogeneous pond is 1050~1150mg/L, suspension content is 50~80mg/L.Gas
Floating pond goes out water suspension content and is less than 50mg/L.
Anaerobic reactor is equipped with air water distribution area, packing area and exhalant region successively from bottom to up.Air water distribution is equipped with area
Supporting layer, water distributor and gas pipe.Wherein perforated tube water distributor be located at supporting layer low inside put, perforated tube gas pipe position
In supporting layer internal upper part position, supporting layer is made of the porcelain ball Jing Guo grading：The particle diameter of bottom porcelain ball is 25mm, intermediate layer porcelain
The particle diameter of ball is 13mm, the particle diameter of upper strata porcelain ball is 6mm.Packing layer on supporting layer uses the walnut that particle diameter is 2.5~3mm
Shell.It is exhalant region on packing layer, equipped with three phase separator, catch basin, effluent weir and filter screen.
In initial start stage, the inoculum density for controlling anaerobic reactor (preferably oxygen condition at this time) interior activated sludge is 350mg/
L, the water inlet volumetric loading for controlling anaerobic reactor (preferably oxygen condition at this time) is 3kgCOD/ (m3D), anaerobism is anti-within 10d
The dischargeable capacity load of device (preferably oxygen condition at this time) is answered to reach 2.5kgCOD/ (m3D), hereafter, anaerobic reactor is by aerobic
State is changed into anaerobic state operation, and by 35d, Anaerobic Treatment Payload reaches 5kgCOD/ (m3D), anaerobic effluent COD
Reach below 200mg/L, suspension content maintains below 60mg/L.
Aerobic reactor is mainly made of water distributor, gas pipe, supporting layer, packing layer and Disengagement zone.Wherein perforated tube
Water distributor is located at that supporting layer low inside is put, perforated tube gas pipe is located at supporting layer internal upper part position, and supporting layer is by by level
The porcelain ball composition matched somebody with somebody：The particle diameter of bottom porcelain ball is 25mm, the particle diameter of intermediate layer porcelain ball is 13mm, the particle diameter of upper strata porcelain ball is
6mm.Packing layer on supporting layer uses the walnut shell that particle diameter is 2.5~3mm.It is Disengagement zone on packing layer.
In initial start stage, the water inlet volumetric loading for controlling aerobic reactor is 3.5kgCOD/ (m3D), it is aerobic within 10d
The dischargeable capacity load of reactor reaches 3.2kgCOD/ (m3D), outputted aerobic water COD reaches below 60mg/L, suspension content
Maintain below 30mg/L.
Embodiment 2
The COD of MTO waste water is 500~2000mg/L, suspension content is 50~300mg/L.Coagulative precipitation tank water outlet is hanged
Float content is 30~150mg/L.Water outlet COD in homogeneous pond is 800~1500mg/L, suspension content is 50~100mg/L.Gas
Floating pond goes out water suspension content and is less than 80mg/L.
Anaerobic reactor is equipped with air water distribution area, packing area and exhalant region successively from bottom to up.Air water distribution is equipped with area
Supporting layer, water distributor and gas pipe.Wherein perforated tube water distributor be located at supporting layer low inside put, perforated tube gas pipe position
In supporting layer internal upper part position, supporting layer is made of the porcelain ball Jing Guo grading：The particle diameter of bottom porcelain ball is 13mm, intermediate layer porcelain
The particle diameter of ball is 6mm, the particle diameter of upper strata porcelain ball is 3mm.Packing layer on supporting layer uses the core that particle diameter is 1.5~2.5mm
Peach shell.It is exhalant region on packing layer, equipped with three phase separator, catch basin, effluent weir and filter screen.
In initial start stage, the inoculum density for controlling anaerobic reactor (preferably oxygen condition at this time) interior activated sludge is 150mg/
L, the water inlet volumetric loading for controlling anaerobic reactor (preferably oxygen condition at this time) is 2kgCOD/ (m3D), anaerobic reaction within 7d
The dischargeable capacity load of device (preferably oxygen condition at this time) reaches 1.5kgCOD/ (m3D), hereafter, anaerobic reactor is by aerobic shape
State is changed into anaerobic state operation, and by 40d, Anaerobic Treatment Payload reaches 8kgCOD/ (m3D), anaerobic effluent COD reaches
Below 80mg/L is maintained to below 200mg/L, suspension content.
Aerobic reactor is mainly made of water distributor, gas pipe, supporting layer, packing layer and Disengagement zone.Wherein perforated tube
Water distributor is located at that supporting layer low inside is put, perforated tube gas pipe is located at supporting layer internal upper part position, and supporting layer is by by level
The porcelain ball composition matched somebody with somebody：The particle diameter of bottom porcelain ball is 13mm, the particle diameter of intermediate layer porcelain ball is 6mm, the particle diameter of upper strata porcelain ball is
3mm.Packing layer on supporting layer uses the walnut shell that particle diameter is 1.5~2.5mm.It is Disengagement zone on packing layer.
In initial start stage, the water inlet volumetric loading for controlling aerobic reactor is 1kgCOD/ (m3D), it is aerobic anti-within 15d
The dischargeable capacity load of device is answered to reach 0.8kgCOD/ (m3D), outputted aerobic water COD reaches below 60mg/L, suspension content dimension
Hold in below 50mg/L.
Embodiment 3
The COD of MTO waste water is 300~1500mg/L, suspension content is 50~200mg/L.Coagulative precipitation tank water outlet is hanged
Float content is 30~100mg/L.Water outlet COD in homogeneous pond is 500~1200mg/L, suspension content is 50~80mg/L.Gas
Floating pond goes out water suspension content and is less than 50mg/L.
Anaerobic reactor is equipped with air water distribution area, packing area and exhalant region successively from bottom to up.Air water distribution is equipped with area
Supporting layer, water distributor and gas pipe.Wherein perforated tube water distributor be located at supporting layer low inside put, perforated tube gas pipe position
In supporting layer internal upper part position, supporting layer is made of the porcelain ball Jing Guo grading：The particle diameter of bottom porcelain ball is 25mm, intermediate layer porcelain
The particle diameter of ball is 13mm, the particle diameter of upper strata porcelain ball is 6mm.Packing layer on supporting layer uses the walnut that particle diameter is 2.5~3mm
Shell.It is exhalant region on packing layer, equipped with three phase separator, catch basin, effluent weir and filter screen.
In operating status, the expansion rate for controlling packing layer is 5~50%, anaerobic reactor Payload can maintain 2~
10kgCOD/(m3D), anaerobic effluent COD can reach below 200mg/L, suspension content can reach below 60mg/L.
Aerobic reactor is mainly made of water distributor, gas pipe, supporting layer, packing layer and Disengagement zone.Wherein perforated tube
Water distributor is located at that supporting layer low inside is put, perforated tube gas pipe is located at supporting layer internal upper part position, and supporting layer is by by level
The porcelain ball composition matched somebody with somebody：The particle diameter of bottom porcelain ball is 25mm, the particle diameter of intermediate layer porcelain ball is 13mm, the particle diameter of upper strata porcelain ball is
6mm.Packing layer on supporting layer uses the walnut shell that particle diameter is 2.5~3mm.It is Disengagement zone on packing layer.
In operating status, the expansion rate for controlling packing layer is 0.5~50%, and the Payload of aerobic reactor can maintain
0.5~3.5kgCOD/ (m3D), outputted aerobic water COD can reach below 60mg/L, suspension content can reach below 30mg/L.
The content not being described in detail in this specification belongs to the prior art known to professional and technical personnel in the field.
Claims (14)
- A kind of 1. methanol-to-olefins wastewater treatment equipment, it is characterised in that including：Oil separator, coagulative precipitation tank, homogeneous pond, Matter pond water outlet pump, flotation tank, anaerobism circulating tank, anaerobism circulating pump, anaerobic reactor, anaerobic effluent tank, anaerobic effluent pump, oxygenation Device, aerobic circulating pump and aerobic reactor；Oil separator, coagulative precipitation tank, homogeneous pond are sequentially connected by pipeline,Connected between homogeneous pond and flotation tank by the pipeline equipped with homogeneous pond water outlet pump,Flotation tank is connected respectively to anaerobism circulating tank, anaerobic effluent tank by pipeline,It is equipped between anaerobism circulating tank, anaerobic effluent tank and connects the pipeline of the two,Anaerobism circulating tank is connected to anaerobic reactor by the pipeline equipped with anaerobism circulating pump,Anaerobic reactor is connected directly to anaerobism circulating tank by single pipeline,Anaerobic reactor is connected to oxygenator by pipeline,Anaerobic effluent tank by being connected to oxygenator equipped with the pipeline that anaerobic effluent pumps,Branch drain is additionally provided with the pipeline equipped with anaerobic effluent pump,The reflux water out of oxygenator is connected to aerobic reactor by the pipeline equipped with aerobic circulating pump,It is equipped between oxygenator and anaerobism circulating tank and connects the pipeline of the two,It is equipped between oxygenator and aerobic reactor and connects the pipeline of the two；The anaerobic reactor is equipped with air water distribution area (101), packing area (102) and exhalant region (103) successively from bottom to up, its In：Air water distribution is equipped with supporting layer, water distributor (104) and gas pipe (105) in area；Three phase separator (108), catch basin (106) and effluent weir (107) are equipped with exhalant region；Water distributor (104) is located at supporting layer low inside and puts, and evenly distributing for anaerobic reactor water inlet is used for realization, using perforation Tubular type water distributor,Gas pipe (105) is located at supporting layer internal upper part position, evenly distributing for anaerobic reactor air inlet is used for realization, using perforation Tubular type gas pipe,Supporting layer has the function of to support filler, further evenly distributes aqueous vapor, and using gravel or porcelain ball, supporting layer particle diameter is 3 ~25mm, supporting layer use 2~3 grades of gradings,Packing layer is located on supporting layer, is the main place for carrying out anaerobic organism reaction, and filler uses walnut shell, packing material size For 1.5~3mm, in operating status, the expansion rate of packing layer is 5~50%,Exhalant region should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, in addition also real The collection of existing biogas, while use and expand exhalant region diameter, filtering measure is used using three phase separator and in catch basin Integrated approach meet the functional requirement of exhalant region；The aerobic reactor is mainly made of water distributor, gas pipe, supporting layer, packing layer and Disengagement zone, wherein：Water distributor is used for realization evenly distributing for aerobic reactor water inlet, using perforated tube water distributor,Gas pipe is used for realization evenly distributing for aerobic reactor air inlet, using perforated tube gas pipe,Supporting layer has the function of to support filler, further evenly distributes aqueous vapor, using gravel or porcelain ball；Supporting layer particle diameter is 3 ~25mm；Supporting layer uses 2~3 grades of gradings；Packing layer is the main place for carrying out aerobe reaction, using walnut shell；Packing material size is 1.5~3mm；In operating status, the expansion rate of packing layer is 0.5~50%；Disengagement zone should ensure that the uniformity of packing layer current will also realize the separation of entrained filler in waste water, while using expansion Big Disengagement zone diameter and meet the functional requirement of Disengagement zone using the integrated approach of filtering measure.
- 2. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：Homogeneous pond water outlet pump uses Centrifugal pump.
- 3. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：The anaerobism circulating tank is using vertical Tank.
- 4. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：The anaerobism circulating pump use from Heart pump.
- 5. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：The anaerobic effluent tank is using vertical Tank.
- 6. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：Anaerobic effluent pump using from Heart pump.
- 7. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：The oxygenator uses vertical knot Structure.
- 8. methanol-to-olefins wastewater treatment equipment as claimed in claim 1, it is characterised in that：The aerobic circulating pump use from Heart pump.
- 9. the methanol-to-olefins wastewater treatment equipment as described in claim 1~8 is one of any, it is characterised in that：The device Startup method comprises the following steps：The first step, sequence starting oil separator, coagulative precipitation tank, homogeneous pond, homogeneous pond water outlet pump, flotation tank, anaerobism circulating tank, detest Oxygen goes out water pot, anaerobic effluent pump；Second step, sequence starting anaerobism circulating pump, anaerobic reactor, oxygenator；3rd step, sequence starting oxygenator, aerobic circulating pump, aerobic reactor.
- 10. methanol-to-olefins wastewater treatment equipment as claimed in claim 9, it is characterised in that：In the first step, as oil separator The MTO waste water of water, its COD is 300~2000mg/L, suspension content is 50~300mg/L；Oil separator water outlet gravity flow enters coagulative precipitation tank, and it is 30~150mg/L that coagulative precipitation tank, which goes out water suspension content,；Coagulative precipitation tank water outlet gravity flow enters homogeneous pond, and water outlet COD in homogeneous pond is 500~1500mg/L, suspension content is less than 100mg/L；The water outlet of homogeneous pond is pumped into flotation tank by the water outlet of homogeneous pond, and flotation tank goes out water suspension content and is less than 80mg/L；Flotation tank water outlet gravity flow enters anaerobism circulating tank, and enters anaerobic effluent tank through the gravity flow of anaerobism circulating tank；The water outlet of anaerobic effluent tank is pumped toward follow up device by anaerobic effluent and is further processed.
- 11. methanol-to-olefins wastewater treatment equipment as claimed in claim 9, it is characterised in that：In second step, in the first step After start-up course, anaerobism circulating pump is opened, the waste water in anaerobism circulating tank is sent into anaerobic reactor, anaerobic reactor goes out Water gravity flow enters oxygenator；Oxygenator is opened, oxygenator water outlet gravity flow enters anaerobism circulating tank；Add a small amount of activated sludge in toward oxygenator, the initial concentration control of seed sludge is 50~500mg/ in anaerobic reactor L；It is 1~4kgCOD/ (m to control water inlet volumetric loading of the anaerobic reactor under aerobic state3D), promote packing layer quick Biofilm,When dischargeable capacity load of the anaerobic reactor under aerobic state is 0.5~3kgCOD/ (m3When d), oxygenation will be flow to certainly The anaerobic reactor water outlet of device all switches to anaerobism circulating tank, and oxygenator temporarily disables,Hereafter, anaerobic reactor is changed into anaerobic state by aerobic state, controls the COD loads of anaerobic reactor and steps up Its effective COD load, when the effective COD loads of anaerobic reactor are close to design load, anaerobic reactor start-up course terminates.
- 12. methanol-to-olefins wastewater treatment equipment as claimed in claim 11, it is characterised in that：Design the Anaerobic Treatment used COD Payloads are 2~10kgCOD/ (m3·d)。
- 13. methanol-to-olefins wastewater treatment equipment as claimed in claim 9, it is characterised in that：In 3rd step, work as anaerobic reaction When the effective COD loads of device are close to design load, anaerobic effluent is pumped into whole water outlets and is sent into oxygenator, oxygenator is opened, opens aerobic Circulating pump, waste water flows automatically after aerobic reactor enters oxygenator, and wherein most waste water passes through aerobic circulating pump after oxygenation Circulated, remaining waste water then overflow discharge,When the effective COD loads of aerobic reactor are close to design load, aerobic reactor start-up course terminates.
- 14. methanol-to-olefins wastewater treatment equipment as claimed in claim 13, it is characterised in that：Design the Aerobic Process for Treatment used COD Payloads are 0.5~3.5kgCOD/ (m3·d)。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238832Y (en) * | 1995-11-29 | 1996-10-30 | 西安市澄宇环境工程开发公司 | Efficient integral low-concentration treatment device for organic waste water |
| CN102442745A (en) * | 2010-09-30 | 2012-05-09 | 中国石油化工股份有限公司 | Treatment method of high-concentration waste water during methanol-to-olefin process |
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2014
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238832Y (en) * | 1995-11-29 | 1996-10-30 | 西安市澄宇环境工程开发公司 | Efficient integral low-concentration treatment device for organic waste water |
| CN102442745A (en) * | 2010-09-30 | 2012-05-09 | 中国石油化工股份有限公司 | Treatment method of high-concentration waste water during methanol-to-olefin process |
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