CN102811956B - Gasifying buck treatment system - Google Patents

Abstract

In one embodiment, a kind of grey water treatment system includes the oxidation reactor for making buck aoxidize.Grey water treatment system also includes biological reducing and the settling system with microorganism, and microorganism is designed to remove one or more target components from oxidized buck.

Description

Gasifying buck treatment system

Technical field

Subject matter disclosed herein relates to the gasification device of Chemical Manufacture and/or relates to Integrated gasification combined cycle (IGCC) power device.More specifically, disclosed embodiment relates to process the grey water treatment system of the buck that gasification produces.

Background technology

The such as Fossil fuel of solid coal, liquid petroleum or natural gas is gasifiable for generating, generation chemicals, generation synthetic fuel, or for other application multiple.Gasification relates to making carbon-containing fuel and oxygen react at very high temperatures, to produce synthesis gas that is more more efficient than the fuel being in its initial condition and that more burn cleanly, i.e. comprises the fuel of carbon monoxide and hydrogen.The by-product of gasification is buck, and it can include fine ash grain, metal, ammonia and biodegradable organic substance.Ash water constituent in some or all of may by country and/or federal agency control.Accordingly, it is possible to buck to be processed, so that buck was being removed the most desired composition wanted before gasification system is discharged.

Summary of the invention

Summarize inventing some suitable embodiment with originally statement in terms of scope below.These embodiments are not intended to limit the scope of the invention of statement, but on the contrary, these embodiments are intended merely to provide the brief overview of the possible form of the present invention.It practice, the present invention can include the various forms that may look like or differ from embodiment set forth below.

In the first embodiment, a kind of grey water treatment system includes: oxidation reactor, it is configured to make buck aoxidize；And including biological reducing and the settling system of microorganism, microorganism is configured to remove one or more target components from oxidized buck.

In a second embodiment, a kind of grey water treatment system includes: oxidation reactor, and it is configured to make the selenium material oxidation in buck；And including biological reducing and the settling system of microorganism, microorganism is configured to oxidized selenium material be carried out electronation and makes it be precipitated out from buck.

In the third embodiment, a kind of grey water treatment system includes: pretreatment system, it is configured to remove fouling components from buck and produce preprocessed buck.Grey water treatment system farther includes biological treatment system, and biological treatment system is configured to make preprocessed buck aoxidize, and removes one or more target components from oxidized preprocessed buck and produce through biological treatment buck.

Accompanying drawing explanation

When being read with reference to the drawings described in detail below, these and other features of the invention, aspect will become better understood with advantage, and in the accompanying drawings, same-sign represents same parts in all figures, wherein:

Fig. 1 is the schematic block diagram of the embodiment of integrated gasification combined cycle system；

Fig. 2 is the schematic block diagram of the embodiment of the grey water treatment system of Fig. 1；And

Fig. 3 is the detailed schematic block diagram of the grey water treatment system of Fig. 2.

Detailed description of the invention

One or more specific embodiments of the invention will be described below.In order to be devoted to provide the simple and clear description to these embodiments, all features that may realize reality in the description are described.It is to be understood that, when such as develop in any engineering or design object any this actual realize time, have to make as many decisions proprietary for realizing to realize the objectives of developer, such as meet with system about and the constraint relevant with business, the objectives of developer can change each other according to different realizations.Moreover, it will be appreciated that this development is probably complicated and time-consuming, however, for the those of ordinary skill benefiting from the disclosure, this development will be the routine mission designing, producing and manufacture.

When introducing the element of various embodiments of the present invention, article " ", " a kind of ", " being somebody's turn to do " and " described " are intended to indicate and there is this element one or more.Term " includes ", " comprising " and " having " is intended to inclusive, and represents in addition to the element listed, and can there is other element.

It relates to the grey water treatment system that can be used in gasification system or Integrated gasification combined cycle (IGCC) system, to process the buck produced during gasifying.Grey water treatment system includes biological reducing and the precipitation biological treatment system with microorganism, and microorganism is specifically designed to and removes target component from buck.Specifically, microorganism may be designed specifically to remove target component, such as selenium, arsenic, hydrargyrum, molybdenum, nitrate and vanadium, rather than removes organic principle.Microorganism and can make it precipitate to remove target component by target component carries out electronation.It addition, some target components can be changed into other chemical composition that can discharge as gas by microorganism.

Grey water treatment system may also include pretreatment equipment, such as chemical reactor, defecator and filter, and they remove fouling components and trace metal at biological reducing and precipitation biological treatment system upstream.It addition, can include that oxidation reactor, to make some target components aoxidize, removes target component with permission by reduction and precipitation at biological reducing and precipitation biological treatment system upstream.In addition, it may include pretreatment equipment (such as membrane bioreactor) is to remove extra composition from buck.

Fig. 1 illustrates IGCC system 10, and it can produce buck, as the by-product of gasification.IGCC system 10 includes the gasification system 12 integrated with power generation system 14.In gasification system 12, carbon-containing fuel source 16 can be used as energy source to produce synthesis gas.Fuels sources 16 can include coal, petroleum coke, biomass, material based on timber, agricultural wastes, tar, coke oven gas and Colophonium or other carbonaceous material.

Fuels sources 16 can be incorporated in gasification system 12 by feedstock preparation system 18.Feedstock preparation system 18 can such as by fuels sources 16 being minced, grinds, shred, pulverizing, briquetting or stacking redefine size or the shape of fuels sources 16, to produce fuel slurry 20.According to some embodiment, feedstock preparation system 18 can include grinder.It addition, in feedstock preparation system 18, the additive 22 of such as water or other suitable liquid can be added to fuels sources 16, to produce fuel slurry 20.But, in the other embodiments being provided without liquid additive, fuel slurry 20 can be dry feed.

Fuel slurry 20 can be directed into gasification and washing system 24 from feedstock preparation system 18.Gasification and washing system 24 can include gasifier, and in gasifier, fuel slurry 20 can be blended to produce synthesis gas with oxygen 26 and steam 27.Can be provided oxygen 26 by air separator 28, air 30 is separated into oxygen 26 and nitrogen 32 by air separator 28.Steam 27 can in IGCC system 10 recirculation, and can downstream gas cooling and processing system 34 steam 27 is provided.

In gasification and washing system 24, gasifier can make fuel slurry 20 with limited amount oxygen (such as, partial oxidation) at high pressure (absolute pressures of the most about 20 bars to 85 bars) with high temperature is (such as, about 700 DEG C to 1600 DEG C) under react so that fuel slurry 20 partly aoxidizes and produces synthesis gas.Due to the chemical reaction between the carbon in oxygen 26, steam 27 and fuel slurry 20, synthesis gas can include hydrogen, carbon monoxide and carbon dioxide, and other the most desired composition wanted, such as ash, sulfur, nitrogen and the chloride being present in carbon-containing fuel source 16.

In order to fuel slurry 20 is changed into synthesis gas, first gasifier can heat fuel slurry 20, to be subjected to pyrolytic process.According to some embodiment, the scope of the temperature within gasifier 20 may be about 150 DEG C to 700 DEG C during pyrolytic process, and this depends on the type of the fuels sources 16 for producing fuel slurry 20.The fuel slurry 20 heating during pyrolytic process can produce solid (such as, charcoal), and residual gas, such as, carbon monoxide and hydrogen.

Then combustion process can be carried out in gasifier.Burning can include oxygen 26 is incorporated into charcoal and residual gas.Charcoal and residual gas can react with oxygen 26 and form carbon dioxide and carbon monoxide, and this provides the heat for follow-up gasification reaction.According to some embodiment, the scope of the temperature during combustion process may be about 700 DEG C to 1600 DEG C.It follows that steam 27 can be introduced in gasifier during gasification step.Being of about at a temperature of 800 DEG C to 1100 DEG C in scope, charcoal can react with carbon dioxide and steam 27 and produce carbon monoxide and hydrogen.Generally, gasifier utilizes steam 27 and oxygen 26 allowing some feeds " to burn " and produces carbon monoxide and energy, and this energy can drive the second reaction that feed is further converted into hydrogen and extra carbon dioxide, thus produces synthesis gas.Synthesis gas can include carbon monoxide and the hydrogen of about 85%, and methane, carbon dioxide, water, hydrogen chloride, fluohydric acid gas, carbonyl sulfide, ammonia, Blausure (German) and hydrogen sulfide (depending on the sulfur content of feed).The most gasifiable putty material and fuel slurry 20 that is unconverted and/or that convert the most completely can be the by-product of process, and it can exist as bigger melted slag charge granule and less granule (referred to as particulate).

Gasification and washing system 24 may also include cooler, such as radiation synthesis Gas Cooler or quenching unit.In cooler, synthesis gas can be made to cool down and saturated, so that the most desired composition solidification wanted.Specifically, melted slag charge can quickly cool down and be frozen into the slag charge 36 of coarse particles, and slag charge processing system 38 can be discharged and be supplied to slag charge 36 from gasification and washing system 24.Inter alia, slag charge processing system 38 can include the equipment that such as lock hopper, drag conveyor and/or slag charge are cheated.In slag charge processing system 38, slag charge 36 can be screened to reduce dampness, and be then guided to off-site and be disposed.Such as, slag charge 36 can be used as roadbed or is used as another kind of construction material.

In addition to producing slag charge 36, gasification and washing system 24 also can produce the Heisui River 40 including fine slag material granule.Heisui River 40 can be removed from synthesis gas at quenching unit and/or in the scrubber of gasification and washing system 24.Specifically, in scrubber, extra particulate and other gas that carries, such as hydrogen chloride be can be removed.Black water treatment system 42 can be discharged and be directed in Heisui River 40 from gasification and washing system 24.

Inter alia, black water treatment system 42 can include such as flash drum, settling tank and the equipment of condenser, and they are used for separating the gas of dissolving and the fine grained of concentration.Such as, black water treatment system 42 can include a series of flash drum, and they make Heisui River 40 experience a series of decompression, and this can make Heisui River 40 partly evaporate and cool down, to remove the gas 43 of dissolving.According to some embodiment, the gas 43 of dissolving can include the synthesis gas that can reclaim in gas cooling and processing system 34.Black water treatment system 42 may also include infall process, and infall process produces the particulate 44 and buck 45 separated, and buck 45 can be reused in gasification and washing system 24.Black water treatment system 42 also can produce and be carried out, by diarrhea, a part of buck of processing to remove the most desired composition wanted, and this is referred to as buck blowdown 46.The particulate 44 separated can be recycled to feedstock preparation system 14, and wherein, particulate can be used to provide extra fuel.

Buck blowdown 46 can be directed into grey water treatment system 48, and wherein, buck blowdown 46 can experience process further, produces treated emission 50 to remove gas (such as ammonia) and solid.As further describe referring to Fig. 2, grey water treatment system 48 can include the equipment of such as chemical reactor, defecator, filter and stripper, and buck blowdown 46 is softened, clarifies and purifies by they.Grey water treatment system 48 may also include bioreactor and membrane filter unit, and they remove organic material and metal from buck blowdown 46.According to some embodiment, grey water treatment system 52 can include biological reducing and precipitation biological treatment system, biological reducing and precipitation biological treatment system use the mixture being especially formed of spontaneous microorganism target component carries out electronation and makes it be precipitated out from buck 46, and produce treated emission 50.Treated emission 50 can send and carry out deep well injection, is combined with another kind stream and discharges, or is discharged to water body, if treated emission 50 meets environmental regulations and/or permits requirement.

In addition to producing slag charge 36 and Heisui River 40, gasification and washing system 24 also produce scrubbed synthesis gas 52.Scrubbed synthesis gas 52 can be directed into synthesis gas cooling and processing system 34, and wherein, synthesis gas can purify further and produce desulfurized syngas 54.Synthesis gas cooling and processing system 34 also can produce the synthesis gas condensate 47 that can be used in gasification and washing system 24 and/or slag charge processing system 38.According to some embodiment, synthesis gas cooling and processing system 34 can include one or more water-gas shift of the ratio of hydrogen and the carbon monoxide regulating in scrubbed synthesis gas 52.Synthesis gas cooling and processing system 34 may also include one or more sour gas of removable sour gas (inter alia, such as hydrogen sulfide and carbon dioxide) and remove process.It addition, synthesis gas cooling and processing system 34 can include one or more stripping process, it is used for removing ammonia.In addition, it may further comprise vent gas treatment process, change into hydrogen sulfide with the major part by the residual sulphur compound from upstream process (such as from sulfur recovery unit).

Desulfurized syngas 54 can be used to produce power in power generation system 14.Specifically, desulfurized syngas 54 can be directed into burner 56, and wherein, desulfurized syngas 54 is than being fed to the original carbon-containing fuel of feedstock preparation system 18 with higher efficiency combustor.Air 57 also can be supplied to burner 56 from compressor 58, so that its fuel air ratio producing burning gases 60 with beneficially desulphurization during combustion synthesis gas 54 mixes with desulfurized syngas 54.Nitrogen 32 can be supplied to burner 56 from air separator 28, to cool down combustion reaction via dilution nitrogen compressor 62.

Burning gases 60 from burner 56 can be directed into gas turbine 64, and gas turbine 64 can drive compressor 58 and/or electromotor 66.Then aerofluxus 68 from gas turbine 64 can be fed to heat recovery steam and (HRSG) system 70 occurs, and HRSG system 70 can reclaim heat from aerofluxus 68 and the steam 27 being received from gas cooling and processing system 34.The heat reclaimed can be used to produce steam 72, and for driving steam turbine 74, steam turbine 74 can drive again electromotor 76 with generating.

Discharge steam 78 from steam turbine 74 is directed through condenser 80, and wherein, steam 78 is condensable to provide condensed steam 82.In order to make steam 78 condense, cooling fluid 84 (such as water) can be made to cycle through condenser 80 from cooling pylon 86.Then the condensed steam 82 carrying out condenser 80 can be recycled to HRSG system 70, and wherein, condensed steam 82 can be heated to generate the steam 72 for steam turbine 74 again.

As can be appreciated, the component of IGCC system 10 is to simplify to describe, and is not intended to restrictive.Such as, in certain embodiments, inter alia, it may include extra equipment, such as valve, temperature sensor, pressure transducer, controller and/or storage tank.Although it addition, herein grey water treatment system 48 described in the background of IGCC system 10, but grey water treatment system 48 can be used in other type of gasification system.Such as, grey water treatment system 48 can be a part for single gasification system 12, and desulfurized syngas 56 can be supplied to the chemical devices for Chemical Manufacture by gasification system 12.

Fig. 2 is the schematic block diagram of the embodiment of the grey water treatment system 48 of Fig. 1.Grey water treatment system 48 includes that pretreatment system 88, pretreatment system 88 receive the buck blowdown 46 from black water treatment system 42 (Fig. 1).In pretreatment system 88, buck blowdown 46 can be processed, to remove trace metal and can cause the fouling components of fouling in downstream equipment.Such as, inter alia, the composition of pretreatment system 88 removable such as Silicon stone, calcium, magnesium, aluminum, antimony, arsenic, cadmium, calcium, ferrum, manganese and hydrargyrum.According to some embodiment, pretreatment system 88 can include such as reactor, defecator and the equipment of filter.Pretreatment system 88 may also include other equipment, with preparation for the buck blowdown 46 carried out a biological disposal upon.Such as, pretreatment system 88 can include one or more stripper, to remove ammonia to the concentration being suitable to biological treatment.

Pretreatment system 88 can produce preprocessed buck 90, and preprocessed buck 90 can be directed into biological treatment system 92, and biological treatment system 92 uses biological treatment process target component carries out electronation and makes it be precipitated out from buck.Specifically, biological treatment system 92 can use the specially designed mixture of spontaneous microorganism to make target component carry out electronation and precipitation.Target component can include metal, metalloid and/or inorganic non-metallic composition, rather than organic principle.Biological treatment system 92 also can use spontaneous microorganism that target component changes into the chemical composition can discharged as gas.Such as, nitrate transformation can be become nitrogen by microorganism.

Biological treatment system 92 may also include other equipment, for preparation for biological reducing and the preprocessed buck 90 of precipitation process.Such as, biological treatment system 92 can include one or more oxidation reactor, and oxidation reactor makes the composition of such as selenium material aoxidize, so that they are ready for biological reducing.In biological reducing and precipitation biological treatment system 92, the composition of removable such as selenium, arsenic, hydrargyrum, molybdenum, nitrate and vanadium, to produce through biological treatment buck 94.

After-treatment system 96 can be directed into through biological treatment buck 94.After-treatment system 96 can include one or more membrane bioreactor, for removing organic principle from through biological treatment buck 94.According to some embodiment, the organic principle of the nutrient of the microorganism that the removable offer of membrane bioreactor is used as in biological treatment system 92.After-treatment system 96 may also include such as reverse osmosis and ion exchange equipment equipment, its level being designed to reduce target component further and/or from through biological treatment buck 94 remove other undesirable composition.Treated emission 50 can leave after-treatment system 96, and can send and carry out deep well injection, or is sent to existing water source by discharge outlet, and this depends on composition present in treated emission 50.It addition, in other embodiments, treated emission 50 can be combined with another kind stream, such as the chemical treatment stream in polyplant, processes further with experience.

Fig. 3 is the more detailed indicative flowchart of grey water treatment system 48.Buck 46 can enter pretreatment system 88 by balance system 98.Balance system 98 can include one or more compensator, and the steady-state flow of buck feed stream 100 is supplied to response system 102 by compensator.Compensator can be also the recirculation flow offer accumulation point from downstream equipment, allows to adjust the flow of buck feed stream 100 simultaneously.It addition, if necessary, chemicals can be provided to compensator, to regulate the pH value of buck feed stream 100.

The buck feed stream 100 carrying out self-balancing system 98 is provided to response system 102, to remove metal and/or fouling components.Specifically, response system 102 can include one or more chemical reactor 103, and chemical reactor 103 makes chemicals 104 react with buck feed stream 100, so that metal and/or fouling components precipitation.According to some embodiment, response system 102 can include three reactors 103 of series connection, and each of which has the agitator being arranged on top, and agitator is designed so that solid Eddy diffusion.But, in other embodiments, it may include series connection and/or any suitable type of parallel connection and/or the reactor 103 of quantity.

In the embodiment using reactor 103, response system 102 can include the first reactor 103A, and wherein, buck feed stream 100 can experience warm Calx and soften.Specifically, Calx can add reactor to as chemicals 104, so that non-carbonate hardness composition (i.e. sulfate and chlorate) precipitation.Additionally, it is possible to provide heat, to reduce the solubility of the such as composition of calcium, magnesium and Silicon stone.Also can add sodium hydroxide and magnesium hydroxide to first reactor, to reduce the Silicon stone dissolved.Such as, Silicon stone can react with magnesium hydroxide, to aid in removing silica in downstream reactor 103B and 103C.

Buck from the first reactor 103A can enter the second reactor 103B, wherein, can add other chemicals 104, to reduce the hardness to low concentration further, forms magnesium and the probability of calcium fouling to reduce, and makes heavy metal sulfide precipitate.Such as, sodium carbonate can be added, to prevent from forming magnesium sulfate and calcium sulfate.Also can add sodium bisulfate, to form heavy metal sulfide, this can precipitate during follow-up clarification steps and remove.It addition, Calx and/or magnesium can be added, to remove extra hardness and Silicon stone.

Buck from the second reactor 103B can flow to the 3rd reactor 103C, wherein, can add extra chemicals 104, to remove extra hardness and heavy metal.Such as, precipitant (such as MetClear can be added^TM, it can be commercially available from Water Treatment Technology Co. of General Electric of Pennsylvania's trie Butterworth (trevose)) solution so that cinnabar granule precipitation.Also can add iron chloride, with calcium hydroxide and magnesium hydroxide co-precipitation.It addition, iron chloride can be used as coagulating agent, and the sedimentation of the granule of precipitation can be assisted.It addition, coagulating agent can assist to form bigger granule by flocculation.3rd reactor 103C may also provide extra residence time, in order to carries out soda ash softening and heavy metals removal.

Feed stream 106 from response system 102 can be directed into clarification system 108, wherein, the solid of removable precipitation.Clarification system 108 can include the distribution equipment of such as current divider box, and it separately flows between some defecators in being included in clarification system 108 coequally.Polymer 110 can be added to current divider box, to aid in separation solid in defecator.According to some embodiment, clarification system 108 can include two solid contact defecators, and they soften buck by making the precipitate formed in response system 102 sedimentation.In defecator, can form sludge blanket, sludge blanket allows solid particle to carry out extra condensation.In certain embodiments, defecator can include the bottom rake providing movement for flocculate.It addition, defecator can provide extra residence time, in order to separate hydroxide metal and metal sulphide.

The solid 112 concentrated in clarification system 108 can be directed into sludge treating system 114, wherein, solid 112 can be made to be dehydrated.Sludge treating system 114 can include the equipment of such as thickener, and wherein, before being fed to be included in the pressure filter in sludge treating system 114, solid can concentrate further.According to some embodiment, thickener can be metal sludge thickener, the sedimentation time that its offer is extra.In certain embodiments, polymer can be added to sludge treating system 114, in order in terms of chemistry, regulate solid for follow-up filter pressing.

Solid 112 from thickener can be directed into pressure filter, the recessed plate press of such as fixed volume, and wherein, solid 112 can experience filter pressing.According to some embodiment, solid 112 can pressurize a period, such as one to three hours, so that solid 112 is dehydrated.Pressure filter can reduce the volume of mud by removing the liquid 116 that can return to response system 102.Remaining solid can be discharged from sludge treating system 114 as mud 118.

Buck feed stream 120 from clarification system 108 can be directed into filtration system 122, removes the suspended solid being formed in response system 102 and clarification system 108 further.Filtration system 122 can include one or more multimedium filter press, and multimedium filter press removes the microgranule of suspension when buck flows through the filter bed of granular or compressible filter medium.In filtration system 122, remove microgranule can prevent the blocking of downstream component, be such as included in the screen tray in the stripper of downstream.Filtration system 122 can be added hydrochloric acid, to prevent fouling.

According to some embodiment, filtration system 122 can include the fall stream filter element accommodating more medium filter (MMF), and more medium filter comprises multiple layer, to strengthen the seizure of microgranule.Such as, filter element can include four layers of filter medium, has gravel to discharge bed below, and wherein, each layer of ratio layer above intercepts less granule.According to some embodiment, layer can include that being arranged on gravel discharges anthracite coal measure, quartz layer, sand bed and the garnet layer above bed.Filtration system 122 can produce enter stripping system 128 through leaching water 126.It addition, in certain embodiments, the part through leaching water 126 can return to filtration system 122, and carrys out clean filtering device as backwash liquor.Used backwash liquor 127 can return to balance system 98, further to be separated.

In stripping system 128, ammonia can be removed from through leaching water 126, to produce the preprocessed buck 90 entering biological treatment system 92.According to some embodiment, stripping system 128 can include the plate column ammonia stripper removed by ammonia 132 as gas.Steam 130 can be provided to heat buck 90 and to provide driving force from evaporation and separation of ammonia through leaching water 126.Ammonia 132 can be sent to the sulfur recovery unit in gas cooling and processing system 34 (Fig. 1).Condensed steam 134 can leave stripping system, and in certain embodiments, it is possible to provide to sludge treating system 114, to carry out filter press filter cake washing.

Preprocessed buck 90 from pretreatment system 88 can enter biological treatment system 92, and wherein, target component can experience the valency reduction in bioreactor, to allow the post precipitation of target component.Specifically, preprocessed buck 90 can leave stripping system 128, and can be sent to oxidative system 138, and wherein, some composition (such as selenium) can be oxidized so that they can be removed in biological treatment process.According to some embodiment, oxidative system 138 can include one or more oxidation reactor, wherein, can add chemicals 140 (such as, hypochlorite, chlorine dioxide, permanganate and/or peroxide) so that selenoliteization and the oxidized feed stream 142 of generation.Such as, the selenium oxidable one-tenth selenate being present in buck as selenium cyanic acid ion or selenite, to remove in biological treatment process.

Then oxidized feed stream 142 can be supplied to reduction and precipitation biological treatment system 144.In reduction and precipitation biological treatment system 144, target is inorganic, metal and/or metalloid composition kind to have the bioreactor of spontaneous culture of microorganism (such as pseudomonas species) can be used to remove, inter alia, such as selenium, nitrate, selenium, arsenic, hydrargyrum, molybdenum and vanadium.According to some embodiment, reducing and precipitate biological treatment system 144 and can include eight bioreactor groups row (train), each has two bioreactor lattice cells.Each bioreactor lattice cell can include the mixture residing in the microorganism in supporting medium (such as granular active carbon).Bioreactor lattice cell can run in fall stream mode, wherein feeds and to introduce at the top in pond by distribution system, and is left by the bottom in pond.Reduction and precipitation biological treatment system 144 may also include one or more heat exchanger, and heat exchanger can heat feed stream 142 before feed stream is transferred to each bioreactor lattice cell.According to some embodiment, reducing and precipitate biological treatment system 144 can be can be from the commercially available ABMet advanced bio metal removal technique of Water Treatment Technology Co. of General Electric.

In reduction and precipitation biological treatment system 144, spontaneous microorganism can carry out electronation and make it precipitate target component, and target component can be inorganic constituents, metal ingredient and/or metalloid composition.In other words, reduce and precipitate the unusable microorganism of biological treatment system 144 to remove organic principle, and changing into using microorganism to remove inorganic constituents, metal ingredient and/or metalloid composition.Microorganism can be the mixture being especially formed, and it is designed so that target component reduction and precipitation.It addition, some composition (such as nitrate) can be changed into other composition that can discharge, such as nitrogen as gas by microorganism.Nutrient 146 is provided to reduction and precipitation biological treatment system 144, thinks that microorganism provides carbon food source.According to some embodiment, nutrient 146 can provide as solution, and solution is ejected in the feed stream of each bioreactor lattice cell.In addition to being supplied to the nutrient 146 of reduction and precipitation biological treatment system 144, the formates in buck can be as the carbon food source of microorganism.

In reduction and precipitation biological treatment system 144, target component can be reduced into biosolids 148 and precipitation.Such as, it is included in the selenium in selenate or selenite and can be reduced into elemental selenium and precipitation.In another example, arsenic can be reduced into arsenic sulfide and precipitation.In order to remove biosolids 148, reduce and precipitate biological treatment system 144 and can be rinsed and/or deaerate.Degassing releasably changes into the target component of gas (such as nitrogen), and rinses biomass and the suspended solid of the accumulation in releasable reduction and precipitation biological treatment system 144.The biosolids 148 of release can be directed into biological sludge processing system 150, and this system can be a part for after-treatment system 96.

Come autoreduction and precipitation biological treatment system 144 through biological treatment buck 94 can enter after-treatment system 96.After-treatment system 96 can process through biological treatment buck 94 further, to remove extra composition from buck, carries out deep well injection to allow buck to send, is discharged to other stream or is discharged by discharge outlet in the case of meeting environmental regulations.

After-treatment system 96 can include that membrane bioreactor system 152, membrane bioreactor system 152 remove Organic substance, total suspended solid (TSS), potential residual ammonia and heavy metal, such as ferrum and manganese.According to some embodiment, membrane bioreactor system 152 can be can be from the commercially available ZeeWeed membrane bioreactor (MBR) of General Electric Co. Limited.Membrane bioreactor system 152 includes the bioreactor being combined with membrane filter unit.Bioreactor can be suspension growth reactor, and it includes preposition anoxia part and aerobic part, so that the organic content degraded in buck.Membrane filter unit can include the hollow-fibre membrane separating the enhancing of liquid and solid constituent.Can use thick or rill bubbler and wind blower that membrane bioreactor system 152 is passed through oxygen 154 constantly, wash away and/or keep suitable oxygen level carrying out film.

Biosolids 156 from membrane bioreactor system 152 can be directed into biological sludge processing system 150, to be dehydrated.Biological sludge processing system 150 can be added a polymer to, in order in the way of chemistry, regulate biosolids 156, in order in biological sludge processing system 150, carry out filter pressing.According to some embodiment, biological sludge processing system 150 can include band press filteration system.In biological sludge processing system 150, biosolids 156 can flow through gravity discharge section, and wherein, biosolids 156 can thickening.After thickening, biosolids 156 can flow to shearing and the compression section of band press filteration system, and wherein, biosolids 156 can be compressed between two relative porous fabrics.It addition, high pressure compressed can be used by making the band comprising biosolids 156 transport through two rollers.Biological sludge processing system 150 can produce mud 160, and mud 160 can be struck off from band by blade, and transmission carries out off-site disposal.The liquid 158 removed from biosolids 156 can be recycled to reduction and precipitation biological treatment system 144, to be further processed.

The buck feed stream 162 leaving membrane bioreactor system 152 can be directed into the most extra processing system 164, and wherein, extra composition can be removed from buck feed stream 162, to produce treated emission 50.According to some embodiment, extra processing system 164 can include the counter-infiltration system removing heavy metal further.Extra processing system 164 may also include use softening agent to remove the ion exchange system of heavy metal.Additionally, in certain embodiments, extra processing system 164 can include other system, inter alia, such as the carbon absorption system of removal of mercury, for removing Weak-acid cation (WAC) system of hardness and heavy metal, for removing the forced ventilation decarbonizer (FDD) of carbon dioxide, or sodium cyclic softening device.But, in other embodiments, extra process can not be used, and buck feed stream 162 can represent the treated emission 50 leaving grey water treatment system 48.

Treated emission 50 can leave grey water treatment system 48, and in the case of meeting environmental regulations, can be discharged in existing water body by discharge outlet.In other embodiments, treated emission 50 can send and carries out deep well injection or can mix with another stream, such as, and the waste water stream in polymerization facility.It addition, in certain embodiments, treated emission 50 part or all of can be used as supplementing water to produce fuel slurry 20, and fuel slurry 20 is sent to gasification and washing system 24 (Fig. 1).

This written description uses examples to disclose the present invention, including optimal mode, and also enables any person skilled in the art to put into practice the present invention, including manufacturing and using any device or system, and the method carrying out any combination.The patentable scope of the present invention is defined by the claims, and can include other example that those skilled in the art expect.If other example such has the structural element of the literal language not differing from claim, if or they include the equivalent structural elements without substantial differences of the literal language with claim, then they are intended to be within the scope of claim.

Claims (19)

1. a grey water treatment system, wherein said grey water treatment system is connected to the grey water treatment system of black water treatment system and configures For receiving buck from described black water treatment system, described buck is processed by described black water treatment system and connects from gasification and washing system The Heisui River received produces, and wherein said grey water treatment system includes:

Oxidation reactor, described oxidation reactor is configured with chemical oxidizing agent makes buck aoxidize, the buck aoxidized with generation, its Described in the selenolite that is configured to make in described buck of oxidation reactor；And

Including biological reducing and the precipitation biological treatment system of microorganism, described microorganism is configured to remove from the described buck aoxidized One or more target components.

Grey water treatment system the most according to claim 1, it is characterised in that described microorganism is configured to described one or many Plant target component carry out electronation and make it precipitate.

Grey water treatment system the most according to claim 1, it is characterised in that one or more target components described include selenium.

Grey water treatment system the most according to claim 1, it is characterised in that one or more target components described include selenium, At least one in arsenic, hydrargyrum, molybdenum, nitrate and vanadium.

Grey water treatment system the most according to claim 1, it is characterised in that described microorganism is configured to become nitrate transformation Nitrogen.

Grey water treatment system the most according to claim 1, it is characterised in that described biological reducing and precipitation biological treatment system Including bioreactor lattice cell, the described microorganism that described bioreactor lattice cell is included in granulated carbon.

7. a grey water treatment system, described grey water treatment system is connected to black water treatment system and is configured to from described usage on black water System receives buck, and wherein said buck is processed, by described black water treatment system, the Heisui River received from gasification and washing system and produces, Wherein said grey water treatment system includes:

Oxidation reactor, described oxidation reactor is configured with the selenium material oxidation in chemical oxidizing agent makes buck, aoxidized to produce Buck；And

Including biological reducing and the precipitation biological treatment system of microorganism, described microorganism is configured to oxidized selenium material is carried out chemistry Reduce and make it be precipitated out from the described buck aoxidized.

Grey water treatment system the most according to claim 7, it is characterised in that described biological reducing and precipitation biological treatment system Including multiple bioreactor lattice cells, the plurality of bioreactor lattice cell comprises the described microorganism residing in granulated carbon.

Grey water treatment system the most according to claim 8, it is characterised in that described biological reducing and precipitation biological treatment system Arranging including multiple bioreactor groups, each bioreactor group row have two biologies in the plurality of bioreactor lattice cell Reactor lattice cell.

Grey water treatment system the most according to claim 7, it is characterised in that described microorganism is configured to become nitrate transformation Nitrogen.

11. grey water treatment systems according to claim 7, it is characterised in that described microorganism is configured to become arsenic electronation Arsenic sulfide and make it precipitate.

12. grey water treatment systems according to claim 7, it is characterised in that described grey water treatment system includes pretreatment system System, described pretreatment system is arranged on described oxidation reactor upstream and is configured to remove fouling components from described buck.

13. 1 kinds of systems, including:

Gasification and washing system, it is configured to produce synthesis gas and Heisui River from fuels sources；

Be connected to the black water treatment system of described gasification and washing system, wherein said black water treatment system be configured to process described Heisui River with Produce buck；

Being connected to the grey water treatment system of described black water treatment system, described grey water treatment system is configured to receive described buck, wherein Described grey water treatment system includes:

Pretreatment system, it is configured to remove fouling components from buck and produce preprocessed buck；And

Biological treatment system, they one or more oxidation reactors including being configured to make described preprocessed buck aoxidize and one Or multiple biological reducing and precipitation biological treatment system, described biological reducing and precipitation biological treatment system are configured to from oxidized Preprocessed buck removes one or more target components and produces the buck through biological treatment；Wherein, the one or more Oxidation reactor is configured to make the selenolite in described buck.

14. systems according to claim 13, it is characterised in that described pretreatment system includes being configured to soften described buck One or more chemical reactors and one or more defecator.

15. systems according to claim 13, it is characterised in that described pretreatment system includes being configured to from described buck Remove one or more filtration systems of suspended solid.

16. systems according to claim 13, it is characterised in that described pretreatment system includes being configured to from described buck Remove the stripper of ammonia.

17. systems according to claim 13, it is characterised in that described grey water treatment system includes being configured to from described through life Thing processes the film biological treatment reactor removing one or more organic principles in buck.

18. systems according to claim 17, it is characterised in that described film biological treatment reactor includes preposition hypoxia response Device, aerobic reactor and filter membrane.

19. systems according to claim 13, it is characterised in that described grey water treatment system is integrated combination cycle system A part.