CN206266378U - A kind of processing system of percolate stoste and concentrate mixed liquor - Google Patents
A kind of processing system of percolate stoste and concentrate mixed liquor Download PDFInfo
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- CN206266378U CN206266378U CN201621247751.4U CN201621247751U CN206266378U CN 206266378 U CN206266378 U CN 206266378U CN 201621247751 U CN201621247751 U CN 201621247751U CN 206266378 U CN206266378 U CN 206266378U
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Abstract
The utility model discloses a kind of percolate stoste and the processing system of concentrate mixed liquor, including pretreatment system and MVR evaporation scrubber systems, it is characterised in that：Pretreatment system includes stoste pond, alkali reaction tank, 1# sedimentation basins, 2# sedimentation basins and acid reaction pond；Acid reaction pond top is connected with intermediate pool, and 1#, 2# sedimentation basin bottom are connected with sludge concentration tank；MVR evaporation scrubber systems include main body evaporator and soda acid aeration tower；Intermediate pool is connected through filter with condensed water plate type heat exchanger and concentrated water plate type heat exchanger, and concentrated water plate type heat exchanger is connected with vent condenser, and vent condenser is connected with MVR main body evaporators；Concentrated water outlet, steam (vapor) outlet, condensation-water drain, the non-condensable gas export of MVR evaporators are connected with corresponding process part respectively.The utility model provides the handling process of above-mentioned processing system, and the handling process energy-saving effect significantly, has the advantages that stabilization, reliable, efficient, low consumption, treating capacity are big.
Description
Technical field
The invention provides a kind of new approaches of sewage disposal, specifically a kind of percolate stoste and concentrate
The processing system of mixed liquor.
Background technology
At present, the handling process combination of percolate is various, but is individually treatment stoste or individually treatment concentration
Liquid.Never it is simultaneously treated with a kind of device to stoste and concentrate mixing.
From《Household refuse landfill sites Environmental capacity standard》Since GB16889-2008 is implemented, percolate industry welcomes
Construction peak period.Specific percolate treating process mainly has：1st, the biochemical method for combining embrane method advanced treating（Hereinafter referred to as
" biochemistry+film "）, such as UASB+A/O/A/O+MBR+NF+RO techniques；2nd, percolate stoste is directly finally up to standard by film process
Discharge, such as two-stage DTRO techniques；3rd, evaporation treatment process, such as MVR coordinate various back-end processing technologies.
The handling process chain of biochemistry+film is more long, its mesophytization part in addition to being vulnerable to the influence of season, change of water quality,
Competency profiling to operating personnel is also higher, and biochemical management difficulty is larger.The concentrate of membranous system needs recharge to process simultaneously, from
And cause secondary pollution.Concentrated liquid recharge will also result in the enrichment of on-site salinity, finally cause the imbalance of biochemical system flora
Death, fouling membrane, film blocking, film producing water ratio step-down etc..Meanwhile, the renewal cost of later stage membrane module is also higher.
Two-stage DTRO techniques, by the mandatory transmission diaphragm of pressurization percolate, investment and operating cost are higher, go out
Water yields poorly, while there is the problem that concentrate secondary pollution and later stage membrane module are changed.
MVR（That is Mechanical Vapor Recompression）The abbreviation of mechanical vapor recompression technology, percolate
Under conditions of evaporation, volatile organic matter, ammonia nitrogen are taken out of with steam in gaseous form, eventually affect effluent quality.One
As can coordinate further treatment behind MVR evaporations, for example：Method, method of soda acid gas washing of ion exchange resin etc..
Wherein, ion exchange resin finally has the problem of resin regeneration, while the substantial amounts of waste liquid containing ammonia nitrogen and COD of generation needs again
Treatment is gone, the problem of regeneration liquid waste needs to solve.
The content of the invention
According to technical problem set forth above, there is provided the processing system of a kind of percolate stoste and concentrate mixed liquor
And its handling process.
The technological means that the present invention is used is as follows：
The processing system of a kind of percolate stoste and concentrate mixed liquor, including pretreatment system and MVR evaporations are washed
Gas system, it is characterised in that：The pretreatment system includes that stoste pond, the alkali being connected with the stoste pond through delivery pump are reacted
1#, 2# sedimentation basin that pond is connected with the alkali reaction tank and the acid reaction pond being connected with 1#, 2# sedimentation basin；It is described
PH value in-line analyzer is provided with acid reaction pond；Mechanical agitator is equipped with the alkali reaction tank and the acid reaction pond；Institute
State acid reaction pond top to be connected with intermediate pool, 1#, 2# sedimentation basin bottom is connected with sludge concentration tank；
The MVR evaporations scrubber system includes main body evaporator and soda acid aeration tower；
The intermediate pool is connected through filter with condensed water plate type heat exchanger and concentrated water plate type heat exchanger；The condensed water
Plate type heat exchanger and the concentrated water plate type heat exchanger are connected with vent condenser；The vent condenser by hot well with it is described
The main body evaporator of MVR evaporation elements is connected；The MVR evaporators use falling film type thin film evaporation；The MVR evaporators steam
Hair operating mode is that tiny structure or pressure-fired evaporate, and is not belonging to pressure vessel category；
It is connected with the concentrated water plate type heat exchanger after the concentrated liquid filter of concentrated solution outlet of the MVR evaporators；
The steam outlet of the MVR evaporators is connected through demister with the sour aeration tower and/or alkali aeration tower, institute
The steam (vapor) outlet for stating sour aeration tower or the alkali aeration tower is connected by jet chimney with vapour compression machine, the both vapor compression
Machine is connected with the MVR evaporators air intake again by steam pipework；
The distilled water outlet of the MVR evaporators is connected through pump with the condensed water plate type heat exchanger；
The non-condensable gas export of the MVR evaporators is connected with the vent condenser；
The MVR evaporators are also communicated with the steam generator of driven by power.
Preferably, the MVR evaporator evaporations Stress control is in 58 mbar ~ 1.2bar.
Preferably, being provided with pH value in-line analyzer in the coagulation reaction tank.
Preferably, being equipped with mechanical agitator in the coagulation reaction tank and the flocculation tank.
Preferably, the MVR evaporators use standpipe falling film type or lying pipe coating film type, when for standpipe falling film type, thing
Material evaporates in heat-exchange tube bundle；When for lying pipe coating film type, material evaporates outside heat-exchange tube bundle；The profile of MVR evaporators
Can be circle, may be alternatively configured square, setting according to actual needs.
Preferably, the MVR evaporators are also communicated with the steam generator of driven by power, by starting steam generation
Device, can make whole system be independent of extraneous boiler supplying steam.
The invention also discloses a kind of above-mentioned percolate stoste and place's science and engineering of concentrate mixing liquid treating system
Skill, it is characterised in that comprise the following steps：
1. pre-process：Mixed liquor enters into alkali reaction tank, with coagulant, flocculation after adjusting pH value through alkali in alkali reaction tank
Agent is sufficiently mixed rear overflow to 1# sedimentation basins, is precipitated through downflow weir overflow to 2# by supernatant after 1# sedimentation basin preliminary sedimentations
Pond, the supernatant of 2# sedimentation basins enters intermediate pool in acid reaction pond through downflow weir overflow to acid reaction pond after acid regulation pH value
It is standby；The solid of 1#, 2# sedimentation basin bottom enters into sludge concentration tank and carries out solid landfill disposal；
2. gas washing is evaporated：Point two parts are distinguished after supernatant after 1. being processed by step is filtered as feeding liquid
Into condensed water plate type heat exchanger and concentrated water plate type heat exchanger, two parts liquid converges into exhaust condensation again after heat exchange
Device, evaporating temperature is reached through the vent condenser laggard feed liquid of heat exchange, and then feeding liquid enters into hot well, and circulating pump is passed through by hot well
It is recycled into MVR evaporator cloth film evaporating；
The concentrated liquid filter of concentrate that feeding liquid is produced after evaporation re-enters into the concentrated water plate type heat exchanger
In carry out heat exchange with the new feeding liquid for entering after deliver to concentrate scratch pool, further subsequent treatment；
After the vapor that feeding liquid is produced after evaporation is through demister, drainage index selection as requested enters pickling gas
Tower and the cooperation of alkali aeration tower are processed；
The ammonia nitrogen carried secretly in steam in sour aeration tower is removed, by the steam after deamination again by setting in tower
After demister carries out vapor-liquid separation, alkali aeration tower is entered by jet chimney.The volatility carried secretly in steam in alkali aeration tower
Organic matter is removed, and the demister that the steam after removing volatile organic matter is then passed through being set in tower carries out vapour-liquid point
From rear, vapour compression machine entrance is entered by jet chimney；
Steam after treatment enters into vapour compression machine after demister, and MVR is re-entered into after vapour compression machine compression
In evaporator, the steam thermal energy lifting after compression, the heat energy of lifting is used to maintain the evaporation of feeding liquid to seethe with excitement, realizes heat exchange；
Steam is condensed into condensed water after heat exchange, and condensed water through pump into re-entering into the condensation after condensate water pot
Heat exchange heel row to discharge bay is carried out in water plate type heat exchanger with the new feeding liquid for entering to discharge.Mixed liquor is through the discharge water after treatment
Can reach《Household refuse landfill sites Environmental capacity standard》The indices requirement of GB16889-2008.
On-condensible gas in steam drains into vent condenser, is discharged after being exchanged heat with the new feeding liquid for entering outdoor.
Preferably, the evaporating pressure of the MVR evaporators is controlled in 58mbar ~ 1.2bar.
Compared with the prior art, the present invention carries out materialization separating treatment using the Chemical Engineering Technology of mature and reliable to mixed liquor,
Mixed liquor explosive evaporation, gas-liquid separation are realized in the case where operating mode is evaporated.During gas-liquid separation, volatile organic acid, volatility
Ammonia nitrogen brought out with steam, carry out pollutant removal into follow-up soda acid scrubber system.
Ammonia nitrogen wherein in mixed liquor enters sour aeration tower with steam in a gaseous form, under finite concentration spray pattern
Ammonia sulfate crystal is formed after sour fully reaction, the clearance of ammonia nitrogen can be up to more than 99%, and ammonium sulfate can contemplate recovery profit
With pollutant ammonia nitrogen Way out is clear and definite；Similarly, in evaporation process, degradable organic matter is mostly to wave in mixed liquor
Hair property organic acid（VOC）Form taken out of with steam, with the quick fully neutralization reaction of alkali under finite concentration spray pattern, VOC
Clearance may be up to more than 95%, obtain the Organic Sodium Salt of saturation state, pollutant Organic Sodium Salt can remove landfill.
Need recharge to process with concentrate in conventional biochemical+membrane treatment process to compare, the concentration of MVR evaporations only≤10%
Liquid is produced, and is high concentration liquid of the concentration close to saturation, and in recharge, 10% concentrate can reach recharge stop.But pass
30% or so the concentrate that system biochemistry+membrane treatment process is formed, can form runoff and finally be back to regulation after recharge to junk-heap body
Pond.Recharge simultaneously causes the accumulation of salt not have any influence to MVR evaporation technologies.Other MVR evaporation technologies can be realized really
Meaning zero liquid discharge, MVR evaporation technologies treatment after 10% concentrate can further desiccation into solid, last solid enters
Row landfill or burning disposal.
In sum, processing system technique of the invention have it is easy to operate, stable, take up an area it is few, not by environment because
The advantages of element influence, while whole system is purely mechanic to be turned into industry, it is possible to achieve one-touch to open machine, foolproof operation, to operator
Member's is less demanding, and operational management is simple and easy to apply.The present invention is for percolate stoste and place's science and engineering of concentrate mixed liquor
Condition, it is very useful.Percolate is solved the problems, such as during for soot technological transformation or special status, there is king-sized meaning, be worth
Promoted in percolate industry.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of processing system of the present invention.
Fig. 2 is the flow chart of handling process of the present invention.
In figure：1st, pretreatment system 11, intermediate pool 12, filter 2, condensed water plate type heat exchanger 21, distillation water pot
3rd, concentrated water plate type heat exchanger 31, concentration liquid filter 4, vent condenser 5, hot well 51, hot well scraper filter 6, MVR steam
Hair device 61, bobbin carriage I 62, bobbin carriage II 63, spraying and liquid distributing device 64, demister 7, sour aeration tower 8, alkali aeration tower 9, vapour pressure
Contracting machine 10, steam generator.
Specific embodiment
As shown in Figure 1 and Figure 2, the processing system of a kind of percolate stoste and concentrate mixed liquor, including pretreatment system
System 1 and MVR evaporation scrubber systems, the alkali that the pretreatment system includes stoste pond, is connected with the stoste pond through delivery pump
1#, 2# sedimentation basin that reaction tank is connected with the alkali reaction tank and the acid reaction pond being connected with 1#, 2# sedimentation basin；
PH value in-line analyzer is provided with the acid reaction pond；Mechanical agitation is equipped with the alkali reaction tank and the acid reaction pond
Device；The acid reaction pond top is connected with intermediate pool 11, and 1#, 2# sedimentation basin bottom is connected with sludge concentration tank.
The MVR evaporations scrubber system includes main body evaporator and soda acid aeration tower；
The intermediate pool 11 is connected through filter 12 with condensed water plate type heat exchanger 2 and concentrated water plate type heat exchanger 3；It is described
Condensed water plate type heat exchanger 2 and the concentrated water plate type heat exchanger 3 are connected with vent condenser 4；The vent condenser 4 passes through
The hot well 5 for being provided with hot well scraper filter 51 is connected with the spraying and liquid distributing device 63 of the main body evaporator 6 of the MVR evaporation elements
It is logical；
The MVR evaporations, are connected after the 6 concentrated liquid filter 31 of concentrated solution outlet with the concentrated water plate type heat exchanger 3
It is logical；
The steam outlet of the MVR evaporators 6 is connected through demister 64 with the sour aeration tower 7 and alkali aeration tower 8,
The steam (vapor) outlet of the alkali aeration tower 8 is connected by jet chimney with vapour compression machine 9, and the vapour compression machine passes through steam
Pipeline is connected with the air intake of MVR evaporators 6 again, i.e., by the bobbin carriage at heat-exchange tube bundle two ends（Can be by bobbin carriage I 61
Or/and bobbin carriage II 62）Enter into heat-exchange tube bundle；
The distilled water outlet of the MVR evaporators 6 is cached by pump and the condensed water plate type heat exchanger 2 through distilling water pot 21
It is connected；
The non-condensable gas export of the MVR evaporators 6 is connected with the vent condenser 4；
The MVR evaporators 6 are also communicated with the steam generator 10 of driven by power.
The handling process of above-mentioned percolate stoste provided by the present invention and concentrate mixing liquid treating system, including
Following steps：
1. pre-process：Mixed liquor is by stoste pond（As shown in Figure 1）Alkali reaction tank is entered into, alkali reaction tank is provided with PH to exist
Line monitor, is adjusted to the optimum PH of coagulating through alkali, is fully mixed with coagulant, flocculant under mechanical agitation
Close.The materials such as suspension, colloid in mixed liquor are combined into macromolecular chain group in pond, and rear overflow to 1# sedimentation basins is passed through
Through downflow weir overflow to 2# sedimentation basins, 1#, 2# sedimentation basin are vertical sedimentation tank, inside set supernatant after 1# sedimentation basin preliminary sedimentations
There is central tube, the mixed liquor that overflow enters enters from central tube, reflected plate reflection is flowed up, and the supernatant of 2# sedimentation basins is through overflowing
It is standby that stream weir overflow enters intermediate pool 11 by mechanical agitation to acid reaction pond, in acid reaction pond after acid regulation pH value；In weight
Under power effect, the solid of 1#, 2# sedimentation basin bottom enters into sludge concentration tank in form of a sludge, and solid-liquid is realized after being dehydrated
Separate, wherein solid landfill disposal, mother liquor returns to stoste pond and further processes.
2. gas washing is evaporated：The supernatant for being cached in intermediate pool 11 after 1. being processed by step is as feeding liquid through filter 12
A point two parts respectively enter condensed water plate type heat exchanger 2 and concentrated water plate type heat exchanger 3, two parts after filtering out suspension therein
Liquid converges into vent condenser 4 again after heat exchange, reaches evaporating temperature through the laggard feed liquid that exchanges heat of vent condenser 4, so
Laggard feed liquid enters into the hot well 5 of MVR evaporators 6, and hot well 5 is provided with hot well scraper filter 51（Liquid can be ensured in MVR
During 6 inner circulation of evaporator, circulating pump, circulation pipe and spraying and liquid distributing device 63 are not blocked）, entered by circulating pump circulation by hot well 5
Enter to MVR evaporators 6 and cloth film is uniformly sprayed in heat-exchanging tube bundle surface by spraying and liquid distributing device 63, carry out cloth film evaporation, evaporated
Mixed liquor part moisture vaporization in journey, partial concentration is into concentrate.
The concentrated liquid filter 31 of concentrate that mixed liquor is produced after evaporation re-enters into the concentrated water plate-type heat-exchange
Carry out with the new mixed liquor for entering delivering to concentrate scratch pool after heat exchange in device 3 standby；
After the vapor that mixed liquor is produced after evaporation is through demister 64, sour aeration tower 7 is entered according to discharge standard selection
Or alkali aeration tower 8 or sour aeration tower 7 and the cooperation of alkali aeration tower 8 treatment, the ammonia nitrogen of entrainment is taken off in steam in sour aeration tower 7
Remove, by the steam after deamination again by tower set demister carry out vapor-liquid separation after, alkali cleaning is entered by jet chimney
Gas tower 8.
The volatile organic matter carried secretly in steam in alkali aeration tower 8 is removed, after removing volatile organic matter
The steam demister that is then passed through setting in tower carry out vapor-liquid separation after, vapour compression machine entrance 9 is entered by jet chimney,
From the bobbin carriage at the heat-exchange tube bundle two ends of MVR evaporators 6 after the boosting temperature raising of vapour compression machine 9（Can by bobbin carriage I 61 or/and
Bobbin carriage II 62）Re-enter into the heat-exchange tube bundle in MVR evaporators 6, the feed liquid outside tube bank with the new low temperature for entering
Heat exchange is carried out, the outer cryogenic liquid of pipe absorbs heat and evaporated and becomes vapor, is condensed into after high-temperature steam release heat in pipe
Distilled water, vapor and distilled water are between the heat-exchange tube bundle of MVR evaporators 6 and its bobbin carriage I 61 at two ends and bobbin carriage II 62
Flowing, abundant evaporation and heat-exchange.
Steam is condensed into distilled water after heat exchange, distilled water through distill water pot 21 cache re-entered into by pump it is described cold
Discharge bay is discharged to after being exchanged heat with the new feed liquid for entering in solidifying water plate formula heat exchanger 2；
The on-condensible gas carried secretly in steam drains into vent condenser 4, directly discharge up to standard after being exchanged heat with the new feed liquid for entering
It is outdoor.
MVR evaporators 6 are that the different characteristic of boiling point is designed at the same pressure according to various materials, by adding
The mode of heat makes material reach the boiling point of certain solvent and be evaporated from solution and separated.During work, evaporator evaporation operating mode
It can be controlled between 58 mbar ~ 1.2bar, evaporating temperature narrow range, only the pollutant under the boiling point can just enter in steam,
Can ensure that high-quality water outlet.
With stoste and concentrate（By 2:1 mixing）The ton per day treating capacity of mixed liquor 150 as a example by, processing system of the invention
Its effluent quality, indices are up to standard and up to product.Enter water COD value in 35000 ~ 40000mg/l, ammonia nitrogen enters water 1000 ~ 2000
Mg/l, using Process for Effluent COD value of the invention in 50 ~ 90 mg/l, ammonia nitrogen completely up to standard can reach in 8 ~ 10 mg/l, system
Produce.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (1)
1. a kind of processing system of percolate stoste and concentrate mixed liquor, including pretreatment system and MVR evaporation gas washings
System, it is characterised in that：The pretreatment system includes that stoste pond, the alkali being connected with the stoste pond through delivery pump are reacted
1#, 2# sedimentation basin that pond is connected with the alkali reaction tank and the acid reaction pond being connected with 1#, 2# sedimentation basin；It is described
PH value in-line analyzer is provided with acid reaction pond；Mechanical agitator is equipped with the alkali reaction tank and the acid reaction pond；Institute
State acid reaction pond top to be connected with intermediate pool, 1#, 2# sedimentation basin bottom is connected with sludge concentration tank；
The MVR evaporations scrubber system includes main body evaporator and sour aeration tower, alkali aeration tower；
The intermediate pool is connected through filter with condensed water plate type heat exchanger and concentrated water plate type heat exchanger；The condensed water is board-like
Heat exchanger and the concentrated water plate type heat exchanger are connected with vent condenser；The vent condenser passes through hot well and the MVR
The main body evaporator of evaporation element is connected；The MVR evaporators use falling film type thin film evaporation；The MVR evaporator evaporations
Stress control is in 58 mbar ~ 1.2bar；
It is connected with the concentrated water plate type heat exchanger after the concentrated liquid filter of concentrated solution outlet of the MVR evaporators；
The steam outlet of the MVR evaporators is connected through demister with the sour aeration tower and/or alkali aeration tower, the acid
The steam (vapor) outlet of aeration tower or the alkali aeration tower is connected by jet chimney with vapour compression machine, and the vapour compression machine leads to
Steam pipework is crossed to be connected with the MVR evaporators air intake again；
The distilled water outlet of the MVR evaporators is connected through pump with the condensed water plate type heat exchanger；
The non-condensable gas export of the MVR evaporators is connected with the vent condenser；
The MVR evaporators are also communicated with the steam generator of driven by power.
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| CN201621247751.4U CN206266378U (en) | 2016-11-22 | 2016-11-22 | A kind of processing system of percolate stoste and concentrate mixed liquor |
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| CN201621247751.4U CN206266378U (en) | 2016-11-22 | 2016-11-22 | A kind of processing system of percolate stoste and concentrate mixed liquor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137934A (en) * | 2020-02-26 | 2020-05-12 | 大连广泰源环保科技有限公司 | Acid and alkali slurry treatment method and system suitable for landfill leachate |
-
2016
- 2016-11-22 CN CN201621247751.4U patent/CN206266378U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137934A (en) * | 2020-02-26 | 2020-05-12 | 大连广泰源环保科技有限公司 | Acid and alkali slurry treatment method and system suitable for landfill leachate |
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