CN110526465A - A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission - Google Patents
A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission Download PDFInfo
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- CN110526465A CN110526465A CN201810545695.XA CN201810545695A CN110526465A CN 110526465 A CN110526465 A CN 110526465A CN 201810545695 A CN201810545695 A CN 201810545695A CN 110526465 A CN110526465 A CN 110526465A
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- China
- Prior art keywords
- salt
- outlet
- connect
- evaporator
- import
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- 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
- C02F1/02—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
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F2001/5218—Crystallization
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a kind of devices for realizing thermal power plant's high-salinity wastewater zero-emission, including evaporator, salt crystallizer, centrifugal dehydrator, fluidized bed drying device and Yan Cang；The outlet of high-salt wastewater is connect with the import of the evaporator, and the steam (vapor) outlet of evaporator is connect with circulation supplement water inlet, and the wastewater outlet of evaporator is connect with the import of salt crystallizer；The water outlet of salt crystallizer is connected to circulation supplement water out, the remaining solid product exit of salt crystallizer is connect with centrifugal dehydrator import, the pure sodium chloride outlet of centrifugal dehydrator is connect with fluidized bed drying device import, and the outlet of fluidized bed drying device is connect with salt storehouse entrance；Operating cost of the present invention is low, the heavy metal ion and organic matter being capable of handling in waste water, and does not need periodic cleaning maintenance, the power plant suitable for different scales.Product by the device is fresh water, sludge and crystal salt, really realizes the zero-emission of waste water.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of device for realizing thermal power plant's high-salinity wastewater zero-emission.
Background technique
Most power plants use cooling tower all to cool down the steam that power generation generates, and how to recycle cooling tower and follow
A large amount of waste water that ring water system generates are solved the problems, such as required for power plant.High-salt wastewater is a kind of main waste water type, especially
It is haline water matter area.How to handle high-salt wastewater realize waste water recycle or even zero-emission is the mesh of many power plant
Mark.
At present for the processing of industrial wastewater mainly using lime-saltcake cleaning process technology, this method is benefit
The magnesium ion in waste water is precipitated with Mg (OH) 2 with lime (Ca (OH) 2) and is removed, recycles mother liquor, being passed through boiler flue will give up
Calcium ion in water is with the removing of CaCO3 precipitation form.This method is mainly completed in two steps.
First step reaction: limewash is reacted with the magnesium ion in brine generates magnesium hydrate precipitate, while lime slurry (Ca
(OH) it 2) is reacted with the sodium sulphate (Na2SO4) in brine and generates calcium sulfate (CaSO4), sediment fraction lime slurry is added to halogen
Calcium ion in water, while generating sodium hydroxide NaOH.Second step reaction；It is reacted using the flue gas that boiler is discharged with the first step
The reaction was continued for brine after the completion, precipitation of calcium carbonate is generated, to remove the calcium ion in brine.The CO2 that contains in flue gas with
Calcium ion reaction in brine generates CaCO3 precipitating, reaches and removes the calcium ion that contains in brine, the purpose of magnesium ion ion,
SO2- is separated in the form of saltcake in sal prunella coproduction technology.
This mode is fine for the removal effect of calcium and magnesium ion in waste water, but the complicated component of power plant effluent, only goes
Except calcium and magnesium ion can not make waste water reach emission request；And this method does not account for the recycling of recirculated water, can make
At a large amount of wastes of water resource.
Summary of the invention
The object of the invention is exactly to be to provide that a kind of operating cost is low, suitable for different operating conditions and can be realized thermal power plant's height
The device of salt wastewater zero discharge.
The present invention is achieved through the following technical solutions:
A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission, including evaporator, salt crystallizer, centrifugal dehydrator, stream
Change bed drying device and Yan Cang；The outlet of high-salt wastewater is connect with the import of the evaporator, the steam (vapor) outlet of evaporator with
Circulation supplement water inlet connection, the wastewater outlet of evaporator are connect with the import of salt crystallizer；The water outlet of salt crystallizer connects
It is connected to circulation supplement water out, the remaining solid product exit of salt crystallizer is connect with centrifugal dehydrator import, centrifugal dehydrator
Pure sodium chloride outlet connect with fluidized bed drying device import, the outlet of fluidized bed drying device and salt storehouse entrance connect
It connects.
Further, the salt crystallizer is also connected with dragveyer, enters dragveyer by the sludge after salt crystallizer.
Further, the centrifugal dehydrator is also connected with sodium chloride purity detecting device.
The present invention uses this device, and the treating capacity of the high-salt wastewater of ion concentration 200000mg/l can achieve
6.25m3/h.The operating cost of this device is low, the heavy metal ion and organic matter being capable of handling in waste water, and does not need periodically
Clean and maintenance, the power plant suitable for different scales.By the device product be fresh water, sludge and crystal salt, wherein fresh water into
Enter circulating water system system；Sludge enters lower one of circulation technology；Crystal salt stores outward transport by being packaged after packing, really real
The zero-emission of existing waste water.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission successively includes evaporator, salt crystallizer, centrifugal dehydration
Machine, fluidized bed drying device and Yan Cang；
The import of the outlet and evaporator of high-salt wastewater connects, the steam (vapor) outlet of evaporator and circulating water system import
Connection, the wastewater outlet of remaining evaporator are connect with the import of salt crystallizer；
The water outlet of salt crystallizer be connected to circulation supplement water inlet, the remaining solid product exit of salt crystallizer with from
Heart dewaterer import connection；The import of the pure NaCl outlet and fluidized bed drying device of centrifugal dehydrator connects；Fluidized bed
The outlet of drying device is connect with salt storehouse entrance.Salt crystallizer is also connected with dragveyer.By the sludge after salt crystallizer into
Enter dragveyer, hence into next cycle.
Further, centrifuge is connected with online NaCl purity detecting device.It is pure by what is obtained after centrifuge
NaCl is crystal grain, purity > 99.1%.The NaCl crystal obtained by centrifugal dehydrator enters fluidized bed drying device.Through
It crosses the salt obtained after fluidized bed drying device and enters salt storehouse.
High-salt wastewater enters the device, by head tank and regulating valve chain control, guarantees that head tank guarantees certain liquid level；
Again by feed pump, flowmeter, waste water is sent to plate type preheater, after recycling condensed water thermal energy, temperature enters strong after improving
Circulating evaporator processed.
Firstly, waste water enters forced-circulation evaporator circulating line, by forced circulation pump, sent with certain flow velocity to adding
Hot device heat temperature raising, then to flash distillation release heat and moisture content in crystallizer；After material flashes off moisture content, the concentration of waste water is improved,
It is precipitated more than crystal is just had after saturation degree；After magma reaches a certain amount of in crystallizer, bulky grain crystal can be settled down to salt leg；By
It can also change in pressure in the variation of density, salt leg, the solid-to-liquid ratio of magma feed liquid in salt leg is observed after sampling, waste water does not reach
To when setting concentration, then crystallizer is returned to by discharging pump.When reaching setting concentration, magma tank is pumped to by discharging, in magma
Thickening improves solid-to-liquid ratio in tank；Then it is separated by solid-liquid separation to centrifugal dehydrator, isolates pure NaCl.The pure NaCl passes through
Fluidized bed bed body is added in feeder, is passed through preheated air or various boiler waste gas from equipment container lower section, makes in fluidized bed
Material particles are blown afloat to suspend in fluidized state and be crushed.Simultaneously in fluidized bed upper outlet, dried material is collected, is sent
Enter salt storehouse.
The device processing capacity is 8t/h.High-salt wastewater is with 6.25m3/ h speed initially enters evaporator, by evaporator
The steam generated afterwards is with 1.05m3/ h enters circulation as circulating water system, remaining waste water is with 5.2m3/ h enters salt
Crystallizer.The processing capacity of salt crystallizer is 6t/h, and the fresh water of generation is with 3.05m3/ h, into circulation as recirculated water
Supplement water；NaCl solution containing high solid-liquid ratio enters centrifugal dehydrator with 1.65t/h speed；Remaining waste material is with 0.5m3/ h speed
Into dragveyer.
The NaCl crystal obtained by centrifugal dehydrator enters fluidized bed drying device with 1.65t/h speed.By fluidisation
Moisture content≤0.30% of the salt obtained after bed drying device；The salt obtained after fluidized bed drying device is with 1.45t/h's
Speed enters salt storehouse.
Can be seen that the device from above-mentioned implementation data may be implemented the zero-emission of high-salt wastewater, and the device obtains
Salt can reach 1.2.4 industry top grade salt standard.
Embodiment 2:
A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission successively includes evaporator, salt crystallizer, centrifugal dehydration
Machine, fluidized bed drying device and Yan Cang；
The import of the outlet and evaporator of high-salt wastewater connects, the steam (vapor) outlet of evaporator and circulating water system import
Connection, the wastewater outlet of remaining evaporator are connect with the import of salt crystallizer；
The water outlet of salt crystallizer be connected to circulation supplement water inlet, the remaining solid product exit of salt crystallizer with from
Heart dewaterer import connection；The import of the pure NaCl outlet and fluidized bed drying device of centrifuge connects；Fluidized bed drying
The outlet of device is connect with salt storehouse entrance.
Centrifugal dehydrator and fluidized bed drying device are also connected with charging rate synchronizing device.Material passes through centrifugal dehydrator
Speed with fluidized bed drying device is identical.Moisture content≤0.30% of the salt obtained after fluidized bed drying device；
The salt obtained after fluidized bed drying device enters salt storehouse.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (3)
1. a kind of device for realizing thermal power plant's high-salinity wastewater zero-emission, which is characterized in that including evaporator, salt crystallizer, centrifugation
Dewaterer, fluidized bed drying device and Yan Cang；The outlet of high-salt wastewater is connect with the import of the evaporator, the steaming of evaporator
Vapor outlet is connect with circulation supplement water inlet, and the wastewater outlet of evaporator is connect with the import of salt crystallizer；Salt crystallizer it is light
Water out is connected to circulation supplement water out, and the remaining solid product exit of salt crystallizer is connect with centrifugal dehydrator import, from
The pure sodium chloride outlet of heart dewaterer is connect with fluidized bed drying device import, the outlet and salt of fluidized bed drying device
The connection of storehouse entrance.
2. a kind of device for realizing thermal power plant's high-salinity wastewater zero-emission according to claim 1, which is characterized in that the salt
Crystallizer is also connected with dragveyer, enters dragveyer by the sludge after salt crystallizer.
3. a kind of device for realizing thermal power plant's high-salinity wastewater zero-emission according to claim 1, which is characterized in that it is described from
Heart dewaterer is also connected with sodium chloride purity detecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545695.XA CN110526465A (en) | 2018-05-25 | 2018-05-25 | A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545695.XA CN110526465A (en) | 2018-05-25 | 2018-05-25 | A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110526465A true CN110526465A (en) | 2019-12-03 |
Family
ID=68657044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810545695.XA Withdrawn CN110526465A (en) | 2018-05-25 | 2018-05-25 | A kind of device for realizing thermal power plant's high-salinity wastewater zero-emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110526465A (en) |
-
2018
- 2018-05-25 CN CN201810545695.XA patent/CN110526465A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191203 |