CN104496128B - A kind of lurgi gasifier advanced waste treatment system and method - Google Patents
A kind of lurgi gasifier advanced waste treatment system and method Download PDFInfo
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of lurgi gasifier advanced waste treatment system and method, system includes: the pretreatment unit, core processing unit and the advanced treatment unit that are sequentially connected with constitute tertiary treatment structure；Wherein, pretreatment unit, oil interceptor, regulating reservoir, deliming removing oil system, coagulation floatation and intermediate pool sequentially it is linked to be；Core processing unit, is sequentially linked to be with second pond by strengthening up-flow anaerobic reactor, one-level AO biochemistry pool, two grades of AO biochemistry pools；Advanced treatment unit, is processed system, deoxidation pond, BAF and reuse pool be sequentially linked to be by efficiently mixed heavy pond, V-type filter tank, advanced oxidation；Reuse pool is provided with drainage equipment and drain pipe.Coordinated by the pretreatment unit of the specific composition of tertiary structure, core processing unit and advanced treatment unit, realize, in the way of the combination of physics, chemistry and bioremediation, coal gas lurgi gasifier waste water is carried out system process, pointed treatment effect can be reached.
Description
Technical field
The present invention relates to field of waste water treatment, particularly relate to a kind of lurgi gasifier advanced waste treatment system processing industrial wastewater and method.
Background technology
Lurgi gasifier is the topmost dry distillation of coal type of furnace of coal gas industry.Its waste water be coal in high-temperature retorting process, with coal gas overflow, condensation formed.In coal gasifying process, lurgi gasifier outlet generally has circulating water spray system, to reduce gas temperature, the organic impurities of coal gas band, undecomposed gasifying agent (steam) and tar condensing are got off simultaneously, and washed by the ash in coal gas, thus produce substantial amounts of coal gas wastewater.Every material that can be dissolved in water or be slightly soluble in water in coal gas, all can form extremely complex residue waste water in condensation process, and this is a part of waste water maximum in coal gas wastewater.
Lurgi gasifier broken coal gasification furnace is fixed-bed gasification furnace, and owing to furnace roof operation temperature is low, therefore containing Organic substances such as more tar, phenol in coal gas, and ammonia nitrogen is significantly high, the organic matter of sewage of generation, tar, phenol, ammonia-nitrogen content height in gas washing process.Due to broken coal gasification furnace coal gasify Phenol for Waste Water, ammonia concentration considerably beyond biochemical treatment can tolerance range, generally first organic substance in coal gasification waste water is tentatively reclaimed, the recovery common method of phenol and ammonia is had solvent extraction dephenolize, ammonia still process etc..Waste water through dephenolize, except ammonia pretreatment after, alleviate the load of subsequent biochemical processing unit, and can guarantee that the effect of biochemical treatment.
Sewage is after the phenol recovery/recovery ammonia pretreatment of device district, major pollutants in waste water are CODcr, petroleum-type, sulfide, ammonia nitrogen, volatile phenol etc., contain the hazardous contaminants such as substantial amounts of alkane, many lopps, heterocyclic, biphenyl, pyridine, indole, quinoline and cyanide simultaneously, and oils concentration is high, colourity is high, belongs to the high-concentration organic industrial waste water of relatively bio-refractory.Owing to biochemistry is poisonous and inhibitory substance is many, biochemical treatment process is difficult to the degradable of organic pollution.
It processes technique mainly has following several:
(1) oil removal regulates UASB hydrolysis acidification pool multistage AO activated coke absorption and coagulation precipitation biofilter；
(2) oil removal regulates the mixed heavy advanced oxidation biofilter, pond of the multistage AO of air supporting anaerobic hydrolysis acidification tank；
(3) oil removal regulates the mixed heavy ozone oxidation biofilter, pond of air supporting MIC CASS；
In above-mentioned technique (1), technique front end does not have the facility of breakdown of emulsion and oil removing, causes that the waste water oil content entering biochemical system is higher, and biochemical system cannot stable operation.The process technique adopting activated coke absorption and precipitation can bring a series of problem, the solid-liquid separation that mainly there is activated coke is relatively difficult, activated coke powder through mixing and absorption is more difficult with aqueous solution to be separated, causing that the situation ratio of sedimentation tank race mud is more serious, secondly because activated coke is after dehydration, moisture content is still higher (75～80%), incinerator cannot be directly entered burn, the form requiring over outdoor dry in the sun carries out second dehydration, and owing to the dry in the sun phase is longer, required place is bigger.Finally, due to the time of staying of multistage AO is longer, the biodegradability of water outlet is poor, and then through the process of the biofilter being core with biochemical treatment, its clearance is unable to reach designing requirement.
In technique (2), topmost problem is to be not provided with particulate matter filtration system in advanced oxidation processes front end, and in Advanced Oxidation Technics in Dealing rear end, it does not have ozone decomposed and deoxygenation system are set, cause that BAF advanced treating cannot meet design requirement.
In technique (3), adopt MIC (improvement anaerobic internal circulation reactor) technique inapplicable for the lurgi gasifier gasification waste water that water inlet oil concentration is higher, its subject matter is the oil emulsion of lurgi gasifier gasification waste water middle and high concentration, these oil emulsions play inhibitory action for metabolism and the biochemical reaction of microorganism, secondly, polyhydric phenols containing higher concentration in lurgi gasifier gasification waste water, biology is had obvious toxicity and inhibitory action, thus causing that anaerobic system cannot play its original design level, treatment effect is poor.Secondly ozone oxidation is directly adopted without filtration after coagulative precipitation tank, there is also some problems, the pharmaceutical quantities added due to coagulating sedimentation is bigger, cause water outlet still contains substantial amounts of float, these suspended particulate substances have obvious counter productive for ozone reaction, and ozone itself is also have selective for the degraded of COD, the biodegradability of water outlet improves inconspicuous, ultimately results in processing water outlet and cannot obtaining satisfied result of biofilter.
Summary of the invention
Based on the problem existing for above-mentioned prior art, the present invention provides a kind of lurgi gasifier advanced waste treatment system and method, the coal gas lurgi gasifier gasification waste water in Modern Coal-based Chemical field and relevant coal chemical industrial waste water is processed for system, after making process, water outlet reaches corresponding discharge or reuse standard, it is to avoid pollute and water resource waste.
For solving above-mentioned technical problem, the present invention provides a kind of lurgi gasifier advanced waste treatment system, including:
The pretreatment unit, core processing unit and the advanced treatment unit that are sequentially connected with constitute tertiary treatment structure；Wherein,
Described pretreatment unit, is sequentially connected with is formed by oil interceptor, regulating reservoir, deliming removing oil system, coagulation floatation and intermediate pool；Described oil interceptor is provided with the water inlet pipe introducing lurgi gasifier waste water, is provided with submersible agitator in described regulating reservoir；
Described core processing unit, is sequentially connected with is formed by strengthening up-flow anaerobic reactor, one-level AO biochemistry pool, two grades of AO biochemistry pools and second pond；It is provided with floating stuffing in described strengthening up-flow anaerobic reactor；
Described advanced treatment unit, is processed system, deoxidation pond, BAF and reuse pool and is sequentially connected with by efficiently mixed heavy pond, V-type filter tank, advanced oxidation and forms；Being provided with ultraviolet light module and ozonation aerated system in described advanced oxidation process system, described reuse pool is provided with drainage equipment and drain pipe.
The present invention also provides for a kind of lurgi gasifier advanced waste treatment method, adopts process system of the present invention, comprises the following steps:
Pre-treatment: make the pretreatment unit that pending lurgi gasifier waste water enters described process system be sequentially carried out oil removal process, adjustment process, deliming deoiling treatment and coagulation air-float and process；
Core processing: make the core processing unit that the water outlet after pre-treatment enters described process system be sequentially carried out strengthening up-flow anaerobic reaction and process and anoxia and aerobic treatment；
Advanced treating: make the advanced treatment unit of the described process system of entrance of the water outlet after core processing be sequentially carried out efficiently mixed heavy process, advanced oxidation process, deoxidation treatment and biological aerated filter and process；
Remove after above-mentioned tertiary treatment and arrange outside the water outlet of COD, namely complete the advanced treating to lurgi gasifier waste water.
The invention have the benefit that the pretreatment unit by ad hoc structure, core processing unit and advanced treatment unit are sequentially connected with composition tertiary treatment structure, the lasting high-efficiency comprehensive utilization of the water resource of Coal Chemical Industry plant area can be realized, after waste water after native system processes can be processed by follow-up Treatment for Reuse (ultrafiltration and reverse osmosis) system, reach plant area's recirculated cooling water moisturizing requirement, thus realizing the comprehensive utilization of water resource, existing situation is the inflow requirement being unable to reach recycling processing system through the water outlet of sewage treatment project, or cannot run continually and steadily after entrance recycling processing system, cause the water resource waste that Coal Chemical Industry plant area is huge；The efficient removal of pollutant can be realized, it is to avoid bigger environmental hazard is caused in the area of ecological environment frailty around, owing to native system is with strong points, pollutants removal rate is thorough, so that the risk reduction of row's environment is to minimum outward.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings.
The schematic diagram of the lurgi gasifier advanced waste treatment system that Fig. 1 provides for the embodiment of the present invention；
The process flow figure that Fig. 2 provides for the embodiment of the present invention；
The component names that in Fig. 1, each label is corresponding is respectively as follows: 100-pretreatment unit；1-oil interceptor；2-regulating reservoir；3-oil removing deliming system；4-coagulation floatation；5-intermediate pool；200-core processing unit；6-strengthens up-flow anaerobic reactor；7-one-level AO biochemistry pool；Bis-grades of AO biochemistry pools of 8-；9-second pond；300-advanced treatment unit；The efficiently mixed heavy pond of 10-；11-V type filter tank；12 advanced oxidation ponds (ultraviolet catalytic ozone oxidation reaction device)；13-deoxidation pond；14 BAFs；15 reuse pools；16 accident pools.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into protection scope of the present invention.
Fig. 1 show a kind of lurgi gasifier advanced waste treatment system that the embodiment of the present invention provides, and can be applicable to other Industrial Wastewater Treatment of Modern Coal-based Chemical, such as coal liquifaction, olefin hydrocarbon making by coal, the wastewater treatment in the fields such as ammonia from coal and coal aromatic hydrocarbons.This system includes:
The pretreatment unit, core processing unit and the advanced treatment unit that are sequentially connected with constitute tertiary treatment structure；Wherein,
Pretreatment unit, is sequentially connected with is formed by oil interceptor, regulating reservoir, deliming removing oil system, coagulation floatation and intermediate pool；Oil interceptor is provided with the water inlet pipe introducing lurgi gasifier waste water, is provided with submersible agitator in regulating reservoir；
Core processing unit, is sequentially connected with is formed by strengthening up-flow anaerobic reactor, one-level AO biochemistry pool, two grades of AO biochemistry pools and second pond；It is provided with floating stuffing in strengthening up-flow anaerobic reactor；
Advanced treatment unit, is processed system, deoxidation pond, BAF and reuse pool and is sequentially connected with by efficiently mixed heavy pond, V-type filter tank, advanced oxidation and forms；Being provided with ultraviolet light module and ozonation aerated system in advanced oxidation process system, reuse pool is provided with drainage equipment and drain pipe.
Above-mentioned process system also includes: greasy filth and biochemical excess sludge process system, including: greasy filth reservoir, sludge pump, sludge concentration tank and device for dehydrating sladge waste；
Greasy filth reservoir is connected with the mud discharging mouth of the oil interceptor of pretreatment unit by the road；
Sludge concentration tank is connected with the mud discharging mouth in the efficiently mixed heavy pond of the mud discharging mouth of the second pond of core processing unit and advanced treatment unit by the road；
Greasy filth reservoir and sludge concentration tank are distinguished by the road, sludge pump is connected with device for dehydrating sladge waste.
Processing system by arranging greasy filth and biochemical excess sludge, greasy filth spoil disposal is to greasy filth reservoir, and biochemical excess sludge is delivered to sludge concentration tank through sludge pump, then passes through sludge dewatering system and carries out dehydration.
Above-mentioned process system also includes: accident pool, is connected to the wastewater inlet pipe of regulating reservoir by pipeline, and this wastewater inlet pipe is provided with pollutant on-line monitoring instrument.
In above-mentioned process system, the deliming removing oil system of pretreatment unit is made up of reaction tank and the filler with light electrolysis effect and the oil extraction ash handling equipment being located in reaction tank.
In above-mentioned process system, in the one-level AO biochemistry pool sequentially connected of core processing unit and two grades of AO biochemistry pools, it is equipped with the reflux pump of agitating device, aerator and connection；
Two grades of AO biochemistry pools are provided with the second water inlet pipe that the outlet pipe of the strengthening up-flow anaerobic reactor with core processing unit is directly connected to.
In above-mentioned process system, the advanced oxidation of advanced treatment unit processes system and is provided with the O3 contacted oxidation pond being interconnected and ultraviolet catalytic ozone oxidation pond, ultraviolet catalytic ozone oxidation is provided with ultraviolet light module in pond, being equipped with some ozonation aerated devices in O3 contacted oxidation pond and ultraviolet catalytic ozone oxidation pond, some ozonation aerated devices connect and compose aerating system with the ozonator being located at outside O3 contacted oxidation pond and ultraviolet catalytic ozone oxidation pond by the road.
Fig. 2 show the embodiment of the present invention and also provides for a kind of lurgi gasifier advanced waste treatment method, adopts the process system of the present invention, comprises the following steps:
Pre-treatment: make the pretreatment unit that pending lurgi gasifier waste water entrance processes system be sequentially carried out oil removal process, adjustment process, deliming deoiling treatment and coagulation air-float and process；
Core processing: make the core processing unit that the water outlet entrance after pre-treatment processes system be sequentially carried out strengthening up-flow anaerobic reaction and process and anoxia and aerobic treatment；
Advanced treating: make the advanced treatment unit of the process system of the water outlet entrance after core processing be sequentially carried out efficiently mixed heavy process, advanced oxidation process, deoxidation treatment and biological aerated filter and process；
Remove after above-mentioned tertiary treatment and arrange outside the water outlet of COD, namely complete the advanced treating to lurgi gasifier waste water.
In above-mentioned processing method, the deliming deoiling treatment of pre-treatment is: by processing the filler with light electrolysis effect and the oil extraction ash handling equipment of the deliming removing oil system of the pretreatment unit of system, to the fine inorganic particulate matter in waste water, the separation of oil emulsion and superfine little oil droplet and removal.
In above-mentioned processing method, controlling to make the one-level AO biochemistry pool that 80% (volume ratio) water outlet of strengthening up-flow anaerobic reaction processor enters core processing unit process in core processing, residue water outlet is directly entered two grades of AO biochemistry pools and processes.
In above-mentioned processing method, the advanced oxidation of advanced treating processes and is:
Make the advanced oxidation that upper level discharges waste water penetration depth processing unit process system and first carry out O3 contacted oxidation reaction, the ozone being source of oxygen with pure oxygen is all added in each reaction tank, the O3 contacted oxidation time of staying is 30min～60min, partial organic substances in oxidation removal waste water；
Produce hydroxyl radical free radical by ultraviolet catalytic ozone oxidation afterwards and carry out advanced oxidation process, the wavelength of ultraviolet light is 254nm, the reaction time of ultraviolet catalytic ozone oxidation is 1～2 hour, is difficult to biodegradable organic pollution by the hydroxyl radical free radical Decomposition Wastewater produced；
In above-mentioned course of reaction, pH value of waste water regulates and is preferably 9.0～10.5.
Below in conjunction with specific embodiment, the present invention is processed system and method to be described further.
The embodiment of the present invention provides a kind of lurgi gasifier advanced waste treatment system and method, can to Modern Coal-based Chemical industry such as coal gas lurgi gasifier waste water, the coal chemical industrial waste waters such as the direct liquefaction waste water of coal carry out degree of depth integrated treatment, after making process, water outlet reaches corresponding discharge or reuse standard, it is to avoid pollute and water resource waste.As it is shown in figure 1, this system includes: pretreatment unit, core processing unit and the advanced treatment unit being sequentially connected with, wherein, pretreatment unit: be sequentially connected with formed by oil interceptor, regulating reservoir, deliming removing oil system, coagulation floatation and intermediate pool；Core processing unit: be sequentially connected with formed by strengthening up-flow anaerobic reactor, one-level AO biochemistry pool, two grades of AO biochemistry pools and second pond；Advanced treatment unit: processed system, deoxidation pond, BAF and reuse pool and be sequentially connected with by efficiently mixed heavy pond, V-type filter tank, advanced oxidation and form；
Wherein, in pretreatment unit, oil interceptor is provided with the water inlet introducing lurgi gasifier waste water；Being provided with submersible agitator in regulating reservoir, the wastewater inlet pipe of regulating reservoir is provided with the pollutant on-line monitoring instrument such as COD, ammonia nitrogen, SS；The Main Function of deliming removing oil system is that inorganic particle less for particle diameter contained in lurgi gasifier waste water, grey matter and dissolubility oil, emulsifying wet goods pollutant are easily separated and are removed, it is provided with filler and the oil extraction ash handling equipment with light electrolysis effect, by the specific response time, complete the technical process of deliming oil removing.
In core processing unit, in strengthening up-flow anaerobic reactor, set floating stuffing；Being provided with agitating device, aerator and reflux pump, one-level AO biochemistry pool and two grades of AO biochemistry pools in one-level AO biochemistry pool and two grades of AO biochemistry pools to be sequentially connected in series, two ponds are equipped with agitator, micro-hole aerator and mixed-liquor return pump；
In advanced treatment unit, ultraviolet light module and ozonation aerated system is set in advanced oxidation process system, concrete, advanced oxidation process system is provided with and is sequentially communicated O3 contacted oxidation pond and ultraviolet catalytic ozone oxidation pond, wherein it is provided with ultraviolet light module in ultraviolet catalytic ozone oxidation pond, be equipped with a number of ozonation aerated device in two ponds, aerator by the road with reaction tank outside ozonator connect and compose aerating system；Reuse pool is provided with drainage equipment and discharge outlet.
Further, said system also includes: greasy filth and biochemical excess sludge process system, greasy filth spoil disposal is to greasy filth reservoir, biochemical excess sludge is delivered to sludge concentration tank through sludge pump, then pass through sludge dewatering system and carry out dehydration, greasy filth is set and biochemical excess sludge processes system and can better process greasy filth and biochemical sludge.And the accident pool of the wastewater inlet pipe of regulating reservoir it is connected to by pipeline, accident pool is set index can not met the waste water for the treatment of conditions, be directly entered this accident pool, do not enter regulating reservoir, subsequent biochemical will not be processed and have undesirable effect.
Utilize the above-mentioned process system processing method (can referring to Fig. 2) to lurgi gasifier waste water, comprise the following steps:
Adjustment processes: owing to lurgi gasifier waste water is affected by working condition, water quality variation is bigger, therefore the lurgi gasifier waste water of required process will disclosure satisfy that on-line monitoring instrument detection design value, preferentially enter regulating reservoir, by stirring the adjustment carrying out water quality and the water yield, beyond the waste water of design load, automatically switched by electrodynamic valve, enter accident pool, then process from accident pool import system by stages and in groups again, it is possible to avoid the pollutant fluctuation impact to biochemical system；
Deliming deoiling treatment: the water outlet after above-mentioned adjustment being processed enters into deliming removing oil system, removes the substantial amounts of fine particle and ash that contain in lurgi gasifier waste water, and simultaneously to dissolved oil, oil emulsion carries out oil-water separation, reduces the oil content of water outlet as far as possible；
Coagulation air-float processes: the water outlet after above-mentioned deliming removing oil system being processed carries out coagulation air-float process, the colloid in waste water and tiny float is made to be separated from water by coagulation and air supporting effect, thus being substantially reduced the suspended particulate matter concentration entering into anaerobic reactor.
Strengthening up-flow anaerobic reaction processes: the water outlet after being processed by above-mentioned coagulation air-float carries out anaerobic biochemical reaction process in strengthening up-flow anaerobic reactor, this reactor is filled with the proportion floating stuffing more than 1, anaerobic reactor is formed conversion zone, when bigger upflow velocity, part macromolecule organic in water is decomposed into the Organic substance of lower molecular weight；
Anoxia and aerobic treatment: the water outlet after being processed by above-mentioned anaerobic biochemical reaction enters in one-level AO biochemistry pool and is sequentially carried out anoxia, Aerobic Process for Treatment, it is sequentially carried out anoxia, Aerobic Process for Treatment subsequently in two grades of AO biochemistry pools, water temperature 15～35 DEG C, the time of staying is 3～5 days, return sludge ratio 100%, return current ratio of the mixed liquid is under 200～400% conditions, removes the Organic substance in water body and ammonia nitrogen by nitration denitrification reaction；
Coagulating kinetics: the water outlet after biochemical treatment is carried out coagulating kinetics, removes further the Organic substances such as COD in water, simultaneously as the pre-treating technology that advanced oxidation processes, reduces the SS concentration of water outlet.
Advanced oxidation process processes: in advanced oxidation process equipment, the water outlet after above-mentioned anoxia and aerobic treatment is carried out oxidation Decomposition process, refractory organic in water is carried out oxidation Decomposition, it is introduced into O3 contacted oxidation pond to process, carries out free-radical oxidation advanced treating subsequently into ultraviolet catalytic ozone oxidation pond.
Deoxidation treatment: deoxidation pond is located at advanced oxidation and is processed between system and BAF, it is mainly used in the oversaturated ozone and the oxygen that dissolve in water in elimination advanced oxidation processes, add the finite concentration Co metabolism carbon source for BAF, it is ensured that the treatment effect of BAF simultaneously.
Biological aerated filter processes: the water outlet in deoxidation pond is sent into BAF and carries out biochemical treatment, the biodegradability of the water outlet after processing due to advanced oxidation significantly improves, by the further biodegradation of BAF and Co metabolism effect, complete the further of COD in waste water is degraded and removed.
Deliming deoiling treatment in said method mainly utilizes deliming removing oil system, by mechanism such as demulsifier, acid, Iron carbon reduction, complete the fine inorganic particulate matter (ash) in former water, the separation of oil emulsion and superfine little oil droplet and removal, thus realizing the pre-treatment to former water；
In said method, advanced oxidation processes: by first carrying out O3 contacted oxidation reaction, complete the organic oxidation removal of part in waste water, then pass through ultraviolet catalytic ozone generation hydroxyl radical free radical and carry out advanced oxidation process, by the hydroxyl radical free radical Decomposition Wastewater of generation is difficult to biodegradable organic pollution, the O3 contacted oxidation time of staying is 30min～60min, and the reaction time of ultraviolet catalytic oxidation is 1～2 hour；
Wherein, pH value in reaction should regulate to 9.0～10.5, adds ozone during process in reactor；All adding ozone in course of reaction in each reaction tank, ozone is with pure oxygen for source of oxygen, and the wavelength of ultraviolet light is 254nm, and ozone tail gas is collected, and carries out discharge or reuse oxygen after concentration is destroyed.
Water outlet after advanced oxidation process enters deoxidation pond, and the Main Function in deoxidation pond is abundant ozone decomposition the saturated dissolved oxygen reducing in waste water, adds some Co metabolism carbon sources simultaneously, and the normal table to ensure follow-up BAF runs.
Said system mainly considering, pollutant characteristic arranges two grades of AO biochemistry pools, one-level AO biochemistry pool is removed mainly for the COD of phenols and other organic pollution with bio-toxicity, two grades of AO biochemistry pools are mainly for ammonia nitrogen removal, and two-stage AO processes and all total nitrogen had removal.Additionally, lurgi gasifier waste water can realize branch water inlet, intake 80% at one-level AO biochemistry pool, intake 20% at two grades of AO biochemistry pools, so can reduce pollutant levels at different levels, improve the removal efficiency that system is total.
The process system of the present invention, coordinated by the pretreatment unit of specific composition of tertiary structure, core processing unit and advanced treatment unit, can realize, in the way of the combination of physics, chemistry and bioremediation, coal gas lurgi gasifier waste water is carried out system process, can for processing organic feature of each stage, adopt different process technique, reach pointed treatment effect.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope of present disclosure; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. a lurgi gasifier advanced waste treatment system, it is characterised in that including:
The pretreatment unit, core processing unit and the advanced treatment unit that are sequentially connected with constitute tertiary treatment structure；Wherein,
Described pretreatment unit, is sequentially connected with is formed by oil interceptor, regulating reservoir, deliming removing oil system, coagulation floatation and intermediate pool；Described oil interceptor is provided with the water inlet pipe introducing lurgi gasifier waste water, is provided with submersible agitator in described regulating reservoir；The deliming removing oil system of described pretreatment unit is made up of reaction tank and the filler with light electrolysis effect and the oil extraction ash handling equipment being located in described reaction tank；
Described core processing unit, is sequentially connected with is formed by strengthening up-flow anaerobic reactor, one-level AO biochemistry pool, two grades of AO biochemistry pools and second pond；It is provided with floating stuffing in described strengthening up-flow anaerobic reactor；
Described advanced treatment unit, is processed system, deoxidation pond, BAF and reuse pool and is sequentially connected with by efficiently mixed heavy pond, V-type filter tank, advanced oxidation and forms；Being provided with ultraviolet light module and ozonation aerated system in described advanced oxidation process system, described reuse pool is provided with drainage equipment and drain pipe.
2. a kind of lurgi gasifier advanced waste treatment system according to claim 1, it is characterised in that also include: greasy filth and biochemical excess sludge process system, including: greasy filth reservoir, sludge pump, sludge concentration tank and device for dehydrating sladge waste；
Described greasy filth reservoir is connected with the mud discharging mouth of the oil interceptor of described pretreatment unit by the road；
Described sludge concentration tank is connected with the mud discharging mouth in the efficiently mixed heavy pond of the mud discharging mouth of the second pond of described core processing unit and described advanced treatment unit by the road；
Described greasy filth reservoir and sludge concentration tank are distinguished by the road, sludge pump is connected with described device for dehydrating sladge waste.
3. a kind of lurgi gasifier advanced waste treatment system according to claim 1, it is characterised in that also including: accident pool, be connected to the wastewater inlet pipe of described regulating reservoir by pipeline, this wastewater inlet pipe described is provided with pollutant on-line monitoring instrument.
4. a kind of lurgi gasifier advanced waste treatment system according to any one of claims 1 to 3, it is characterized in that, in the one-level AO biochemistry pool sequentially connected of described core processing unit and two grades of AO biochemistry pools, be equipped with the reflux pump of agitating device, aerator and connection；
Described two grades of AO biochemistry pools are provided with the second water inlet pipe that the outlet pipe of the strengthening up-flow anaerobic reactor with described core processing unit is directly connected to.
5. a kind of lurgi gasifier advanced waste treatment system according to any one of claims 1 to 3, it is characterized in that, the advanced oxidation of described advanced treatment unit processes system and is provided with the O3 contacted oxidation pond being interconnected and ultraviolet catalytic ozone oxidation pond, it is provided with ultraviolet light module in described ultraviolet catalytic ozone oxidation pond, it is equipped with some ozonation aerated devices in described O3 contacted oxidation pond and ultraviolet catalytic ozone oxidation pond, described some ozonation aerated devices connect and compose aerating system with the ozonator being located at outside described O3 contacted oxidation pond and ultraviolet catalytic ozone oxidation pond by the road.
6. a lurgi gasifier advanced waste treatment method, it is characterised in that adopt the process system described in any one of the claims 1 to 5, comprise the following steps:
Pre-treatment: make the pretreatment unit that pending lurgi gasifier waste water enters described process system be sequentially carried out oil removal process, adjustment process, deliming deoiling treatment and coagulation air-float and process；The deliming deoiling treatment of described pre-treatment is: by the filler with light electrolysis effect of the deliming removing oil system of the pretreatment unit of described process system and oil extraction ash handling equipment, to the fine inorganic particulate matter in waste water, the separation of oil emulsion and superfine little oil droplet and removal；
Core processing: make the core processing unit that the water outlet after pre-treatment enters described process system be sequentially carried out strengthening up-flow anaerobic reaction and process and anoxia and aerobic treatment；
Advanced treating: make the advanced treatment unit of the described process system of entrance of the water outlet after core processing be sequentially carried out efficiently mixed heavy process, advanced oxidation process, deoxidation treatment and biological aerated filter and process；
Remove after above-mentioned tertiary treatment and arrange outside the water outlet of COD, namely complete the advanced treating to lurgi gasifier waste water.
7. a kind of lurgi gasifier comprehensive treatment method for wastewater according to claim 6, it is characterized in that, described core processing controls make strengthening up-flow anaerobic reaction processor by volume 80% water outlet enter the one-level AO biochemistry pool of described core processing unit and process, residue water outlet is directly entered two grades of AO biochemistry pools and processes.
8. a kind of lurgi gasifier comprehensive treatment method for wastewater according to claim 6, it is characterised in that the advanced oxidation of described advanced treating processes and is:
Make the advanced oxidation that upper level discharges the waste water described advanced treatment unit of entrance process system and first carry out O3 contacted oxidation reaction, the ozone being source of oxygen with pure oxygen is all added in each reaction tank, the O3 contacted oxidation time of staying is 30min～60min, partial organic substances in oxidation removal waste water；
Produce hydroxyl radical free radical by ultraviolet catalytic ozone oxidation afterwards and carry out advanced oxidation process, the wavelength of ultraviolet light is 254nm, the reaction time of ultraviolet catalytic ozone oxidation is 1～2 hour, is difficult to biodegradable organic pollution by the hydroxyl radical free radical Decomposition Wastewater produced；
In above-mentioned course of reaction, pH value of waste water is adjusted to 9.0～10.5.
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| CN105254135B (en) * | 2015-11-17 | 2017-12-12 | 中蓝连海设计研究院 | Coal liquifaction production wastewater treatment method |
| CN105254154A (en) * | 2015-11-24 | 2016-01-20 | 江苏菲德俐环保科技有限公司 | Biochemical sludge reduction integrated equipment |
| CN105776766A (en) * | 2016-04-29 | 2016-07-20 | 北京桑德环境工程有限公司 | Advanced treatment system for biorefractory wastewater of industrial park |
| CN107585972A (en) * | 2017-10-27 | 2018-01-16 | 山东三星玉米产业科技有限公司 | Grease processing waste water handling process and device |
| CN107721090A (en) * | 2017-11-23 | 2018-02-23 | 清华大学深圳研究生院 | A kind of azo treatment method of printing and dying wastewater and equipment |
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