CN208265947U - A kind of less scaling desulfurizing waste water processing device - Google Patents
A kind of less scaling desulfurizing waste water processing device Download PDFInfo
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- CN208265947U CN208265947U CN201820539570.1U CN201820539570U CN208265947U CN 208265947 U CN208265947 U CN 208265947U CN 201820539570 U CN201820539570 U CN 201820539570U CN 208265947 U CN208265947 U CN 208265947U
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Abstract
The utility model provides a kind of less scaling desulfurizing waste water processing device and processing method, belongs to technical field of environment protection equipment.It solves the problems, such as that existing desulfurization wastewater carries out softening pretreatment and causes operating cost high.This less scaling desulfurizing waste water processing device, including pretreatment system, recombination concentration systems and atomization system, the recombination concentration systems have outlet one, outlet two and outlet three, the recombination concentration systems obtain strong brine one, strong brine two and reuse clear water after capable of being further processed the clear water with high salt obtained after pretreatment, water outlet one and outlet two are connected to by pipeline one and pipeline two with flue respectively, above-mentioned atomization system is connected to pipeline one and pipeline two, for will be in the strong brine atomizing spray to flue in pipeline one and pipeline two.The utility model method can make the not softened pretreatment of desulfurization wastewater realize zero-emission.
Description
Technical field
The utility model belongs to technical field of environment protection equipment, is related to a kind of desulfurization wastewater processing equipment and method, especially relates to
And a kind of less scaling desulfurizing waste water processing device and processing method.
Background technique
Ended for the end of the year 2016,10.5 hundred million kilowatts of national thermoelectricity installed capacity accounts for 64% (data of total installed capacity of electricity capacity
Source: middle Electricity Federation publication " 2016-2017 year, national power supply and demand situation analyzed prediction address "), coal burning can generate a system
Such as oxysulfide atmosphere pollution is arranged, and then generation acid rain etc. causes serious environmental problem, therefore necessary before flue gas emission
Desulfurization.Wet desulphurization and dry desulfurization are the common methods of flue gas desulfurization.Although dry desulfurization treatment process is simple, its efficiency
The disadvantages of not high and occupation area of equipment is wide limits its popularization and application.
The country is mainly wet desulphurization for fume desulphurization method, accounts for total 90% or more desulphurization system.Wet desulphurization efficiency
It is very high, and just capital investment is low, but desulfurization wastewater is one of the secondary pollution after coal-burning boiler dust treatment, main feature
Salt content in 15000-45000mg/L, suspended matter in 10000mg/L or more,In 4000mg/L or more, Ca2+In 1500-
5000mg/L, Mg2+In 3000-6000mg/L, Cl-Concentration is higher and leads to the strong (Filter Tuber For Clean Coal of corrosivity in acid (pH 4-6.5)
Technology, 2015,21 (2): 129-133).Desulfurization wastewater water is although less, but it is with high salt, concentration of suspension is high, easy fouling, easily
Generate secondary pollution, it is difficult to the problems such as stably reaching standard discharges so that desulfurization wastewater to be treated as one, power plant urgently to be resolved
Problem, therefore the technology for developing the zero-emission for being suitable for power plant desulfurization wastewater is very urgent.
Realize that desulfurization wastewater zero-emission mainly there are multiple technologies such as concentration and evaporation crystallizes and flue is spraying etc. at present.Because of desulfurization
Waste water hardness is higher, and concentrator and end solidify the fouling of facility to routine techniques in order to prevent, all needs in preprocessing process
Dual alkali softening is carried out, softening pharmaceutical quantities are big, and operating cost is high.
Utility model content
The purpose of this utility model is to carry out softening pretreatment for existing desulfurization wastewater and cause operating cost
High problem, and propose a kind of not softened pretreated desulfurizing waste water processing device.
The purpose of this utility model can be realized by the following technical scheme:
A kind of less scaling desulfurizing waste water processing device, including pretreatment system, recombination concentration systems and atomization system,
The water inlet of pretreatment system is connected to wet type chimney exhaust desulfurization apparatus, the water outlet and recombination concentration systems of pretreatment system
Inlet communication, which is characterized in that there are three water outlets for the described recombination concentration systems tool, respectively export one, two and of outlet
Outlet three, which obtains strong brine one, dense salt after capable of being further processed the clear water with high salt obtained after pretreatment
Water two and reuse clear water, strong brine one, strong brine two and reuse clear water from above-mentioned outlet one, outlet two and export three one by one respectively
Corresponding discharge, water outlet one and outlet two are connected to by pipeline one and pipeline two with flue respectively, above-mentioned atomization system and pipeline
One is connected to pipeline two, for will be in the strong brine atomizing spray to flue in pipeline one and pipeline two.
In the less scaling desulfurizing waste water processing device of above-mentioned one kind, the pretreatment system include neutralization pond,
Reaction tank, flocculation basin, clarifying basin and tube microfiltration membrane, each section are sequentially communicated, and neutralization pond and above-mentioned wet type chimney are vented desulfuration
Device connection, tube microfiltration membrane are connected to recombination concentration systems, and the neutralization pond is for neutralizing pH value, and reaction tank is for reacting
The sulfide of indissoluble is formed, flocculation basin is used to remove the heavy metal and suspended matter in waste water, and isolates supernatant, and clarifying basin is used
It is adjusted to neutrality in by waste water PH.
In the less scaling desulfurizing waste water processing device of above-mentioned one kind, the recombination concentration systems are using dedicated
Variable-frequency pulse power supply and selectivity are formed through film.Recombination concentration systems can make sulfate radical, carbonate and calcium in clear water with high salt
Ion, magnesium ion are divided into 2 different channels outflows, release easy fouling tendency, obtain two strands it is less scaling and initial concentration
Strong brine.
Compared with prior art, the less scaling desulfurizing waste water processing device and processing method of the utility model by pair
Desulfurization wastewater is pre-processed, and settleable solids are removed, and recycles the RESALT recombination concentration systems under electric drive effect to knot
The calcium sulfate waste water of dirt recombinates concentration, and chemically angle solves fouling problem of the calcium sulfate on film and evaporator, without adding
Add additional chemical medicament, what a step realized the desalination of desulfurization wastewater, high power concentration and concentrated water divides salt, and operating cost is low, can be quickly
The fluctuation of water quality is coped with, and is generated without sludge, is atomized on flue finally by spray system and sprays into concentrated water, tiny particle is dense
The high temperature of water conservancy flue is evaporated to obtain crystal salt, and the dry ash outlet that crystal salt is collected with deduster realizes desulfurization wastewater
The target of zero-emission.
Detailed description of the invention
Fig. 1 is less scaling desulfurizing waste water processing device schematic diagram.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, this less scaling desulfurizing waste water processing device includes pretreatment system, recombination concentration systems and mist
Change system, this desulfurizing waste water processing device are used cooperatively with boiler flue gas treatment system, are vented desulfuration in boiler and wet type chimney
On flue between device (WFGD), it is also provided with electric precipitator (ESP).
Pretreatment system includes neutralization pond, reaction tank, flocculation basin, clarifying basin and tube microfiltration membrane, and each section is sequentially communicated,
Neutralization pond is connected to above-mentioned wet type chimney exhaust desulfurization apparatus, and tube microfiltration membrane is connected to recombination concentration systems.Recombination concentration system
Uniting, there are three water outlets for (RESALT) tool, respectively export one, outlet two and outlet three, and water outlet one and outlet two pass through respectively
Pipeline one and pipeline two are connected to flue, and above-mentioned atomization system is connected to pipeline one and management two.
Included the following steps: using the method that above-mentioned desulfurizing waste water processing device carries out desulfurization wastewater processing
S1, WFGD Limestone-gypsum Wet Flue Gas Desulfurization Process generate desulfurization wastewater because of the accumulation of chloride ion；
S2, the desulfurization wastewater by salt content in 2-4% introduce in neutralization pond, are controlled pH by addition lime slurry
9.0-9.5 between, Fe can be removed3+、Zn2+、Cu2+、Ni2+Deng most of heavy metal ion, while lime slurry can also be with waste water
In F-Reaction, and Pb2+、Hg2+Still exist in waste water in the form of an ion in neutralization pond, waste water is introduced to reaction tank later；
S3, it is added in reaction tank with organic sulfur, the deposition of sulfides that reaction forms indissoluble gets off, later again leads to waste water
Enter flocculation basin；
S4, in flocculation basin, remove heavy metal and suspended matter and and supernatant separation；Heavy metal is by neutralization pond and instead
Sedimentation basin is answered to be removed, however there are many more tiny and dispersion particle and colloid, it needs to make it by adding flocculant
Coacervating large particle and deposit, flocculation basin export be added macromolecule flocculation aid, the growth process of reinforcing particle, into one
Step promotes the precipitating of hydroxide and sulfide；
S5, supernatant is introduced into clarifying basin, PH is adjusted to neutrality, clear water can be obtained in top, and most of sludge is through sludge
Pump is discharged to mortar pool, and fraction sludge can be used as contact sludge and return to waste water reaction pond, and clear water is passed through water tank；
Clear water in water tank is pumped into tube microfiltration membrane processing with water pump, completes pretreatment and obtain clear water with high salt by S6；
S7, reuse clear water (salt content is obtained after handling the clear water with high salt in S6 by recombination concentration systems (RESALT)
In 500-1500ppm) and two strands of less scaling strong brines one and strong brine two, strong brine one and strong brine two are respectively sulfuric acid
Sodium strong brine and chloride strong brine (mainly calcium chloride, magnesium chloride etc.), the salt content and water and strong brine of recycle-water
Water should be sprayed admissible water according to flue and be designed；
Strong brine one and strong brine two in S8, S7 are discharged by pipeline one and pipeline two respectively, are atomized through atomization system
It is sprayed into respectively at 40-60 μm of fine droplet in the flue of deduster leading portion, atomization system requires air compressor pressure to exist
0.65-0.75MPa；
S9, strong brine one and strong brine two are evaporated crystallization in flue, spray into positional distance deduster entrance in 10-
15m；
Enter deduster with flue gas after S10, crystallization, is finally mixed in dry ash and is removed in solid form.
It should be understood that in claims, specification of the utility model, all " including ... " should be understood as out
The meaning of formula is put, that is, its meaning is equal to " at least containing ... ", but should not be understood as enclosed meaning, i.e. its meaning
It should not be construed " only including ... ".
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (3)
1. a kind of less scaling desulfurizing waste water processing device, including pretreatment system, recombination concentration systems and atomization system, in advance
The water inlet of processing system is connected to wet type chimney exhaust desulfurization apparatus, water outlet and the recombination concentration systems of pretreatment system
Inlet communication, which is characterized in that there are three water outlets for the recombination concentration systems tool, respectively export one, outlet two and go out
Mouth three, which obtains strong brine one, strong brine after capable of being further processed the clear water with high salt obtained after pretreatment
Two and reuse clear water, strong brine one, strong brine two and reuse clear water are a pair of from above-mentioned outlet one, outlet two and outlet 31 respectively
It should be discharged, water outlet one and outlet two are connected to by pipeline one and pipeline two with flue respectively, above-mentioned atomization system and pipeline one
It is connected to pipeline two, for will be in the strong brine atomizing spray to flue in pipeline one and pipeline two.
2. the less scaling desulfurizing waste water processing device of one kind according to claim 1, which is characterized in that the pre- place
Reason system includes neutralization pond, reaction tank, flocculation basin, clarifying basin and tube microfiltration membrane, and each section is sequentially communicated, neutralization pond with it is above-mentioned
Wet type chimney is vented desulfurization apparatus connection, and tube microfiltration membrane is connected to recombination concentration systems, and the neutralization pond is for neutralizing PH
Value, for reacting the sulfide for forming indissoluble, flocculation basin is used to remove the heavy metal and suspended matter in waste water reaction tank, and separates
Supernatant out, clarifying basin is for waste water PH to be adjusted to neutrality.
3. the less scaling desulfurizing waste water processing device of one kind according to claim 1 or 2, which is characterized in that described
It recombinates concentration systems and is formed using dedicated variable-frequency pulse power supply and selectivity through film.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467145A (en) * | 2018-04-17 | 2018-08-31 | 浙江大维高新技术股份有限公司 | A kind of less scaling desulfurizing waste water processing device and processing method |
| CN109607879A (en) * | 2019-01-23 | 2019-04-12 | 杭州卧特松环保科技有限公司 | Desulfurization wastewater qualified discharge technique |
| CN109607878A (en) * | 2019-01-23 | 2019-04-12 | 杭州卧特松环保科技有限公司 | Desulfurization wastewater technique of zero discharge |
-
2018
- 2018-04-17 CN CN201820539570.1U patent/CN208265947U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108467145A (en) * | 2018-04-17 | 2018-08-31 | 浙江大维高新技术股份有限公司 | A kind of less scaling desulfurizing waste water processing device and processing method |
| CN109607879A (en) * | 2019-01-23 | 2019-04-12 | 杭州卧特松环保科技有限公司 | Desulfurization wastewater qualified discharge technique |
| CN109607878A (en) * | 2019-01-23 | 2019-04-12 | 杭州卧特松环保科技有限公司 | Desulfurization wastewater technique of zero discharge |
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