CN106045162A - System and method for recycling ammonia nitrogen in refuse leachate - Google Patents
System and method for recycling ammonia nitrogen in refuse leachate Download PDFInfo
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- CN106045162A CN106045162A CN201610429837.7A CN201610429837A CN106045162A CN 106045162 A CN106045162 A CN 106045162A CN 201610429837 A CN201610429837 A CN 201610429837A CN 106045162 A CN106045162 A CN 106045162A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8659—Removing halogens or halogen compounds
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a system and method for recycling ammonia nitrogen in refuse leachate. The system comprises a pretreatment system, an ammonia nitrogen evaporator, a drying cooling system and a flue gas purifier. The pretreatment system comprises a pretreatment system outlet; the ammonia nitrogen evaporator comprises an ammonia nitrogen evaporator inlet, an ammonia nitrogen evaporator steam outlet and an ammonia nitrogen evaporator concentrate outlet; the drying cooling system comprises a drying cooling system gas inlet and a drying cooling system gas outlet. The system and method for recycling ammonia nitrogen in refuse leachate according to the invention use evaporative concentration technique to treat refuse leachate and recycle ammonia nitrogen therein, and the treatment process is simple and efficient; after a recycling, ammonia nitrogen is used directly to purify flue gas, the requirement on its purity is low, and therefore, the process route is simple, the cost is low and the good environment-friendly benefit, treating waste with waste, is achieved.
Description
Technical field
The present invention relates to technical field of sewage, particularly relate to the system that in a kind of percolate, ammonia nitrogen recycles
And method.
Background technology
Along with the raising of Chinese Urbanization level, city size constantly expands, and urban population quantity is continuously increased, resident's
Living standard also improves constantly, and adjoint with this is sharply increasing of domestic waste yield.At present, China's urban life rubbish
The main processing ways of rubbish has the modes such as sanitary landfills, burning, compost.The most any processing mode, the most inevitably
Bring the environmental issue of another sternness: the process problem of percolate.Percolate belongs to high concentration, high ammonia nitrogen and height
The organic wastewater of toxicity, one of difficult waste water being well recognized as.China's Environmental capacity standard increasingly stringent to percolate,
The especially increase of total nitrogen class index, forces percolate treating process to be updated, and technique is more complicated, and cost and cost are also got over
Come the highest.
At present, mainly there is a following several common methods for the NH_3-N treating technique in percolate: ammonia aeration method, life
Thing nitrification and denitrification+reverse osmosis membrane, evaporation+ion-exchange process.The ammonia that ammonia aeration method produces is with other volatilizations a large amount of
Property material, separating-purifying cost is high, it is difficult to realizes recycling, and directly discharges and can cause secondary pollution.Biological nitration
It is under the effect of various microorganisms with denitrification method, by the series reaction such as denitrification and nitrification, ultimately generates titanium dioxide
Carbon, nitrogen and water.Nitration reaction is under aerobic, utilizes the effect of aerobic nitrifier, is nitric acid by the ammonium oxidation in waste water
Salt or nitrite.When not having oxygen, utilizing denitrifying bacterium is nitrogen by remaining nitrite and nitrate reduction, this
Denitrification process needs some organic substrates carbon sources.It is more thorough that biological nitration and denitrification process ammonia nitrogen, low cost, secondary
Polluting little, but construction investment is big, management requires height, and operating cost is high, and treatment effect temperature influence, poor stability.Steam
Send out+ion exchange technique utilizes ion exchange resin to be adsorbed by the ammonia in evaporation condensed water, ion exchange resin is by hydrochloric acid
Regeneration, forms ammonium chloride regeneration liquid waste, and regeneration liquid waste uses special ammonium chloride to concentrate and crystallizer, it is achieved returning of ammonium chloride
Receive, although but technical feasibility high expensive, it is adaptable to the projects that scale is less, recovery ammonia amount is little.
Therefore, ammonia nitrogen harmless treatment and the technology of recycling of a kind of low cost is needed badly, to realize percolate ammonia nitrogen
Process and avoid secondary pollution.
Summary of the invention
In order to solve the problems referred to above, the present invention provides the system and method that a kind of garbage filter ammonia nitrogen recycles, will
Separate ammonia nitrogen collect again with, for the purification of flue gas, it is achieved that the recycling of ammonia nitrogen, there is preferable warp
Ji benefit.
An object of the present invention is to provide the system that a kind of garbage filter ammonia nitrogen recycles, including pretreatment system
System, ammonia nitrogen vaporizer, dry cooling system and smoke eliminator,
Described pretreatment system includes that pretreatment system exports；
Described ammonia nitrogen vaporizer includes ammonia nitrogen evaporator inlet, ammonia nitrogen vaporizer steam (vapor) outlet and ammonia nitrogen vaporizer concentrated solution
Outlet；
Described dry cooling system includes being dried cooling system gas access and dry cooling system gas outlet；
The outlet of described pretreatment system is connected with described ammonia nitrogen evaporator inlet, described ammonia nitrogen vaporizer steam (vapor) outlet and institute
Stating dry cooling system gas access to be connected, described dry cooling system gas outlet is connected with smoke eliminator, described cigarette
Air purifying apparatus is arranged in chimney.
Pretreatment system mainly regulation percolate pH value and the insoluble matter being filtered to remove in percolate.Ammonia nitrogen vaporizer pair
Percolate directly heats, and evaporation produces based on steam and the gaseous mixture of ammonia.It is dried cooling system gaseous mixture is carried out
Drying and dehydrating and cooling.The cooling gas based on ammonia after dry cooling is passed into smoke eliminator, and high-temperature flue gas is defeated
React with ammonia after delivering to smoke eliminator, by pollutant removals such as NOx, the SOx in flue gas and hydrogen chloride.
Concrete, described pretreatment system includes that pretreatment pool, chemicals feeder and fine fack, described chemicals feeder are positioned at described pre-
Processing the top in pond, described fine fack is arranged on described pretreatment pool outlet.Chemicals feeder is for regulating the pH value of percolate, carefully
Grid is for filtering the insoluble matter in percolate.
Further, described dry cooling system includes that exsiccator and cooler, described exsiccator include exsiccator entrance
And dryer export, described cooler includes cooler entrance and cooler outlet, and described exsiccator entrance connects described ammonia nitrogen
Vaporizer steam (vapor) outlet, described cooler entrance connects described dryer export, described cooler outlet and smoke eliminator
It is connected.
Equipped with desiccant in exsiccator, for the drying and dehydrating of gaseous mixture, prevent gaseous mixture condensation liquefaction in subsequent treatment.
Cooler is for the cooling of dried gas.
In the present invention, described smoke eliminator is honeycomb ceramics, described honeycomb ceramics load SCR catalyst (denitration catalyst
Agent), described smoke eliminator is provided with high temperature snifting valve.
Gas after cooling enters smoke eliminator by gasing pump, is ejected in honeycomb ceramics by high temperature snifting valve.
When high temperature flue-gas from boiler is by honeycomb ceramics, under the effect of SCR catalyst, react with ammonia.
Further, described system also includes that air accumulator, described air accumulator are positioned at dry cooling system and gas cleaning dress
Between putting, it is used for storing cooling gas.Described air accumulator includes air accumulator entrance and reservoir outlet, described air accumulator entrance and institute
Stating cooler outlet to connect, described reservoir outlet is connected with described smoke eliminator.
Described system farther includes heat exchanger and preheater, and described heat exchanger includes heat exchanger concentrated solution entrance
With heat exchanger hot water outlet, described preheater includes the outlet of preheater percolate entrance, preheater percolate and preheater hot
Water inlet, described heat exchanger concentrated solution entrance is connected with described ammonia nitrogen vaporizer concentrated solution outlet, described heat exchanger hot water
Outlet is connected with described preheater hot water inlet；Described preheater percolate entrance is connected with pretreatment system, described preheater
Percolate outlet is connected with ammonia nitrogen evaporator inlet.
The concentrated solution that ammonia nitrogen vaporizer produces is by heat exchanger recovery waste heat.Preheater is arranged on pretreatment system and ammonia
Between nitrogen vaporizer, after the heating of percolate preheated device, enter ammonia nitrogen vaporizer.The waste heat that heat exchanger reclaims is for percolate
Preheating.
It is a further object of the present invention to provide a kind of side utilizing said system to carry out garbage filter ammonia nitrogen recycling
Method, including step:
A, regulation percolate pH value and the insoluble matter filtered in percolate；
B, will filter after percolate import described ammonia nitrogen vaporizer carry out directly heating to more than 100 DEG C, generation comprises
Steam and the gaseous mixture of ammonia；
C, by described gaseous mixture importing described dry cooling system be dried dehydration and cooling；
D, being passed in smoke eliminator by the cooling gas comprising ammonia, described cooling gas passes through snifting valve, with high temperature
Flue gas is sufficiently mixed contact, under SCR catalyst effect, and the ammonia in described cooling gas and the pollutant reaction in flue gas, raw
Become innoxious mineral products.
In the present invention, described method farther includes step: described cooling conductance enters air accumulator and stores, then from gas storage
Cooling conductance is entered in smoke eliminator by tank.
Described method farther includes step:
The concentrated solution that E, described ammonia nitrogen vaporizer produce carries out waste heat recovery by described heat exchanger.
Further, before step B, step is increased: percolate is imported described preheater and preheats, by described step
The hot water of rapid E recovery waste heat imports preheater.
The system and method that the garbage filter ammonia nitrogen of the present invention recycles utilizes evaporation concentration technique to garbage filter
Liquid carries out processing and reclaiming its ammonia nitrogen, processes technique simple, and efficiency is high, and the subsequent treatment that percolate can be greatly reduced is difficult
Degree；Ammonia nitrogen is directly used in gas cleaning out after reclaiming, the highest to its purity requirement, and therefore process route is simple, and cost is relatively low,
Achieve the good environmental benefit of the treatment of wastes with processes of wastes against one another.
Accompanying drawing explanation
Fig. 1 is the system schematic that garbage filter ammonia nitrogen of the present invention recycles；
Fig. 2 is the method flow schematic diagram that garbage filter ammonia nitrogen of the present invention recycles.
In figure:
1-pretreatment system, 2-preheater, 3-heat exchanger, 4-ammonia nitrogen vaporizer, 5-exsiccator,
6-cooler, 7-air accumulator, 8-smoke eliminator.
Detailed description of the invention
Below in conjunction with drawings and Examples, the detailed description of the invention of the present invention is described in more details, in order to energy
The advantage being enough more fully understood that the solution of the present invention and various aspects thereof.But, specific embodiments described below and enforcement
Example is only descriptive purpose rather than limitation of the present invention.
An object of the present invention is to provide the system that a kind of garbage filter ammonia nitrogen recycles, as it is shown in figure 1, include
Pretreatment system 1, ammonia nitrogen vaporizer 4, dry cooling system and smoke eliminator 8.
Pretreatment system includes that pretreatment system exports.Pretreatment system mainly regulates percolate pH value and is filtered to remove
Insoluble matter in percolate.
Ammonia nitrogen vaporizer 4 includes that ammonia nitrogen evaporator inlet, ammonia nitrogen vaporizer steam (vapor) outlet and ammonia nitrogen vaporizer concentrated solution go out
Mouthful.Percolate is directly heated by ammonia nitrogen vaporizer 4, and evaporation produces based on steam and the gaseous mixture of ammonia.Ammonia nitrogen evaporates
Device 4 profile is cylindrical, inside sets vaporization chamber, concentrated solution hot well, electrical heating resistance silk.Outside its pipeline being connected with dry cooling system
Bag heat-insulation layer, prevents steam condensate.
Dry cooling system includes being dried cooling system gas access and dry cooling system gas outlet.It is dried cooling system
System is dried dehydration and cooling to gaseous mixture.
The outlet of described pretreatment system is connected with described ammonia nitrogen evaporator inlet, described ammonia nitrogen vaporizer steam (vapor) outlet and institute
Stating dry cooling system gas access to be connected, described dry cooling system gas outlet is connected with smoke eliminator, described cigarette
Air purifying apparatus is arranged in chimney.
Described smoke eliminator 8 is honeycomb ceramics, is located at boiler exhaust gas chimney high temperature position.Described honeycomb ceramics load SCR
Catalyst, described smoke eliminator is provided with 4 high temperature snifting valves.
Being dried the cooling gas based on ammonia after cooling and be passed into smoke eliminator 8, high-temperature flue gas is delivered to flue gas
React with ammonia after purifier 8, the pollutant such as NOx, the SOx in flue gas and hydrogen chloride are changed into the nothing such as nitrogen and ammonium sulfate
The mineral products of evil, thus realize the purification of flue gas.
Concrete, pretreatment system 1 includes pretreatment pool, chemicals feeder, fine fack, pH analyzer and crutcher.Institute
Stating chemicals feeder and pH analyzer is positioned at the top of pretreatment pool, fine fack is arranged on pretreatment pool outlet, and crutcher sets
Put at the bottom of pretreatment pool.Chemicals feeder is for regulating the pH value of percolate, and fine fack is for filtering the insoluble matter in percolate.
Further, described dry cooling system includes exsiccator 5 and cooler 6, exsiccator 5 include exsiccator entrance and
Dryer export, cooler 6 includes cooler entrance and cooler outlet, and exsiccator entrance connects ammonia nitrogen vaporizer steam and goes out
Mouthful, cooler entrance connects dryer export, and cooler outlet is connected with smoke eliminator.
The mixed gas that ammonia nitrogen vaporizer 4 produces, is passed through exsiccator 5, and in exsiccator 5, desiccant selects soda lime, mixing
Gas is absorbed and removed by rear moisture and sour gas, and the gaseous mixture based on ammonia enters cooler cooling down to 50 DEG C
Below.Gas after cooling enters smoke eliminator by gasing pump, is ejected in honeycomb ceramics by high temperature snifting valve.Boiler
When high-temperature flue gas is by honeycomb ceramics, under the effect of SCR catalyst, react with ammonia.
The system of the present invention farther includes preheater 2, heat exchanger 3 and air accumulator 7.
Preheater 2 includes the outlet of preheater percolate entrance, preheater percolate and preheater hot water inlet.Heat exchanger
3 include heat exchanger concentrated solution entrance and heat exchanger hot water outlet.Heat exchanger concentrated solution entrance concentrates with ammonia nitrogen vaporizer
Liquid outlet connects, and heat exchanger hot water outlet is connected with preheater hot water inlet；Preheater percolate entrance and pretreatment system
Connecting, the outlet of preheater percolate is connected with ammonia nitrogen evaporator inlet.
The concentrated solution that ammonia nitrogen vaporizer 4 produces is by heat exchanger 3 recovery waste heat.Preheater 2 is arranged on pretreatment system 1
And between ammonia nitrogen vaporizer 4, after the heating of percolate preheated device 2, enter ammonia nitrogen vaporizer 4.The waste heat that heat exchanger 3 reclaims is used
In the preheating of percolate, thus reduce energy consumption, reduce process costs.
Air accumulator 7, between dry cooling system and smoke eliminator 8, is used for storing cooling gas.Described air accumulator 7
Including air accumulator entrance and reservoir outlet, described air accumulator entrance is connected with described cooler outlet, described reservoir outlet
It is connected with described smoke eliminator.Cooling gas in air accumulator enters smoke eliminator by gasing pump.
It is a further object of the present invention to provide a kind of side utilizing said system to carry out garbage filter ammonia nitrogen recycling
Method, as in figure 2 it is shown, include step:
A, regulation percolate pH value and the insoluble matter filtered in percolate；
B, will filter after percolate import described ammonia nitrogen vaporizer carry out directly heating to more than 100 DEG C, generation comprises
Steam and the gaseous mixture of ammonia；
C, by described gaseous mixture importing described dry cooling system be dried dehydration and cooling；
D, being passed in smoke eliminator by the cooling gas comprising ammonia, described cooling gas passes through snifting valve, with high temperature
Flue gas is sufficiently mixed contact, under SCR catalyst effect, and the ammonia in described cooling gas and the pollutant reaction in flue gas, raw
Become innoxious mineral products.
In the present invention, described method farther includes step: described cooling conductance enters air accumulator and stores, then from gas storage
Cooling conductance is entered in smoke eliminator by tank.
Described method farther includes step:
The concentrated solution that E, described ammonia nitrogen vaporizer produce carries out waste heat recovery by described heat exchanger.
Further, before step B, step is increased: percolate is imported described preheater and preheats, by described step
The hot water of rapid E recovery waste heat imports preheater.
The system and method that the garbage filter ammonia nitrogen of the present invention recycles utilizes evaporation concentration technique to garbage filter
Liquid carries out processing and reclaiming its ammonia nitrogen, processes technique simple, and efficiency is high, and the subsequent treatment that percolate can be greatly reduced is difficult
Degree；Ammonia nitrogen is directly used in gas cleaning out after reclaiming, the highest to its purity requirement, and therefore process route is simple, and cost is relatively low,
Achieve the good environmental benefit of the treatment of wastes with processes of wastes against one another.
It should be noted that each embodiment above by reference to described by accompanying drawing is only in order to illustrate rather than restriction originally
The scope of invention, it will be understood by those within the art that, the most right
Amendment that the present invention is carried out or equivalent, all should contain within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurred in the singular includes plural form, and vice versa.It addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiments.
Claims (10)
1. the system that a garbage filter ammonia nitrogen recycles, it is characterised in that include pretreatment system, ammonia nitrogen vaporizer,
It is dried cooling system and smoke eliminator,
Described pretreatment system includes that pretreatment system exports；
Described ammonia nitrogen vaporizer includes that ammonia nitrogen evaporator inlet, ammonia nitrogen vaporizer steam (vapor) outlet and ammonia nitrogen vaporizer concentrated solution go out
Mouthful；
Described dry cooling system includes being dried cooling system gas access and dry cooling system gas outlet；
The outlet of described pretreatment system is connected with described ammonia nitrogen evaporator inlet, and described ammonia nitrogen vaporizer steam (vapor) outlet is dry with described
Dry cooling system gas access is connected, and described dry cooling system gas outlet is connected with smoke eliminator, and described flue gas is clean
Gasifying device is arranged in chimney.
System the most according to claim 1, it is characterised in that described pretreatment system include pretreatment pool, chemicals feeder and
Fine fack, described chemicals feeder is positioned at the top of described pretreatment pool, and described fine fack is arranged on described pretreatment pool outlet.
System the most according to claim 1, it is characterised in that described dry cooling system includes exsiccator and cooler,
Described exsiccator includes that exsiccator entrance and dryer export, described cooler include cooler entrance and cooler outlet, institute
Stating exsiccator entrance and connect described ammonia nitrogen vaporizer steam (vapor) outlet, described cooler entrance connects described dryer export, described
Cooler outlet is connected with smoke eliminator.
System the most according to claim 1, it is characterised in that described smoke eliminator is honeycomb ceramics, described honeycomb ceramics
Load SCR catalyst, described smoke eliminator is provided with high temperature snifting valve.
System the most according to claim 1, it is characterised in that described system farther includes air accumulator, described air accumulator
Including air accumulator entrance and reservoir outlet, described air accumulator entrance is connected with described cooler outlet, described reservoir outlet
It is connected with described smoke eliminator.
System the most according to claim 1, it is characterised in that described system farther includes heat exchanger and preheater,
Described heat exchanger includes heat exchanger concentrated solution entrance and heat exchanger hot water outlet, and described preheater includes preheater diafiltration
The outlet of liquid entrance, preheater percolate and preheater hot water inlet, described heat exchanger concentrated solution entrance evaporates with described ammonia nitrogen
Device concentrated solution outlet connects, and described heat exchanger hot water outlet is connected with described preheater hot water inlet；Described preheater diafiltration
Liquid entrance is connected with pretreatment system, and the outlet of described preheater percolate is connected with ammonia nitrogen evaporator inlet.
7. utilize the method that the arbitrary described system of claim 1-6 carries out garbage filter ammonia nitrogen recycling, its feature
It is, including step:
A, regulation percolate pH value and the insoluble matter filtered in percolate；
B, will filter after percolate import described ammonia nitrogen vaporizer carry out directly heating to more than 100 DEG C, produce comprise steam
Gaseous mixture with ammonia；
C, by described gaseous mixture importing described dry cooling system be dried dehydration and cooling；
D, being passed in smoke eliminator by the cooling gas comprising ammonia, described cooling gas passes through snifting valve, with high-temperature flue gas
It is sufficiently mixed contact, under SCR catalyst effect, the ammonia in described cooling gas and the pollutant reaction in flue gas, generate nothing
Evilization mineral products.
Method the most according to claim 7, it is characterised in that farther include step: described cooling conductance is entered air accumulator
Store, then from air accumulator, cooling conductance is entered smoke eliminator.
Method the most according to claim 7, it is characterised in that farther include step:
The concentrated solution that E, described ammonia nitrogen vaporizer produce carries out waste heat recovery by described heat exchanger.
Method the most according to claim 7, it is characterised in that increased step before step B: imported by percolate described
Preheater preheats, and the hot water of described step E recovery waste heat is imported preheater.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610389182 | 2016-06-02 | ||
| CN2016103891825 | 2016-06-02 |
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| CN106045162A true CN106045162A (en) | 2016-10-26 |
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| CN201610429837.7A Pending CN106045162A (en) | 2016-06-02 | 2016-06-16 | System and method for recycling ammonia nitrogen in refuse leachate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473303A (en) * | 2017-08-16 | 2017-12-15 | 北京姚魏环保技术有限公司 | A kind of leachate zero-emission based on waste incineration and generating electricity cooperates with ultralow System and method for |
-
2016
- 2016-06-16 CN CN201610429837.7A patent/CN106045162A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107473303A (en) * | 2017-08-16 | 2017-12-15 | 北京姚魏环保技术有限公司 | A kind of leachate zero-emission based on waste incineration and generating electricity cooperates with ultralow System and method for |
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Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |