CN207608433U - A kind of desulfurization wastewater Zero emission device based on novel concentration technique - Google Patents
A kind of desulfurization wastewater Zero emission device based on novel concentration technique Download PDFInfo
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- CN207608433U CN207608433U CN201721176750.XU CN201721176750U CN207608433U CN 207608433 U CN207608433 U CN 207608433U CN 201721176750 U CN201721176750 U CN 201721176750U CN 207608433 U CN207608433 U CN 207608433U
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Abstract
The utility model discloses a kind of desulfurization wastewater Zero emission devices based on novel concentration technique, including：Pre-processing assembly removes removing heavy metals and sludge for carrying out pretreatment to desulfurization wastewater；Capacitive desalination module (6), is connected with pre-processing assembly, receives the pretreated desulfurization wastewater of pre-processing assembly, and carry out concentration decrement treatment to desulfurization wastewater；Crystal system is connected with capacitive desalination module (6), for being crystallized and/or being dried to desulfurization wastewater.The utility model is reduced work using the concentration after being pre-processed in capacitive desalination module processing, the tolerance of equipment can be enhanced while increasing enriching section water yield, reducing concentrated water amount, simplify pretreatment and crystallizer, reduce operating cost and maintenance cost, it reduces energy consumption and improves contamination resistance, realize the further innovation of desulfurization wastewater zero-discharge technology.
Description
Technical field
The utility model is related to energy conservation and environmental protection field more particularly to a kind of desulfurization wastewater Zero emission devices of Thermal Power Generation Industry.
Background technology
The basic conception of wastewater zero discharge be in factory with water except evaporation, air-dry etc. spontaneous combustions loss in addition to, pass through various places
Reason technology realizes recycling in factory, does not discharge any waste water externally, and the salt formation accumulated in water circulation system crystallizes
To recycling.It needs to consider power plant water and efflux wastewater, wherein cigarette in complete wastewater zero discharge system design
The high salinity wastewater treatment difficulty of desulfurization (by taking wet method as an example) system is larger, cannot since heavy metal ion content is higher
Direct emission, general chemistry processing method is excessively complicated, needs uninterruptedly to add chemicals, and treated a large amount of waste water chlorine
Ion can not still remove.
Technique of zero discharge for desulfurization wastewater includes mainly coagulation clarification pretreatment (containing softening), concentration decrement, evaporation
Three links are crystallized, wherein concentration is reduced to the key link of total system, not only need to ensure that producing water water quality can be returned
With, condensed water water is also compressed as possible to reduce investment and the operating cost of evaporation crystallization equipment, meanwhile, it is advanced durable dense
Contracting technology can simplify pretreating process, reduce the performance requirement to the equipment such as settling, softening.Therefore most important.
Currently used concentrating and desalinating technology is mainly bi-membrane method (ultrafiltration+reverse osmosis), nanofiltration separation, electrodialysis and evaporation
Crystallization etc..Bi-membrane method is the most universal, but the technology needs enough pressure and high driving energy at runtime, secondly water use efficiency
Relatively low and be easy to cause secondary pollution, energy consumption is higher, and core element service life is shorter, is easily desulfurized contaminated wastewater, cleaning is again
This is higher for generation, and bi-membrane method impact resistance is poor in addition, and to too high into film water quality requirement, processing requirement is very strict.And it is electric
Voltage needed for dialysis is very high, and cost is equally higher, almost has identical influent quality to limit with bi-membrane method because semi-permeable membrane exists.It steams
Hair concentration (by taking MVR as an example) is more relaxed to purification of water quality requirement, good at water water quality, can make full use of the thermal energy of system, but
If with MVR carry out concentration decrement and it is subsequent crystallize into salt, investment and power consumption will all become white elephant, therefore mostly domestic
Case only crystallizes the MVR cooperation crystallizers concentrated water dealt with after concentrating, does not undertake the task of concentration decrement.
Utility model content
The purpose of this utility model is to provide it is a kind of it is compact-sized it is durable, producing water ratio is high, efficient desalination based on novel
The desulfurization wastewater Zero emission device of concentration technique.
To achieve the above object, a kind of desulfurization wastewater Zero emission device based on novel concentration technique of the utility model
Specific technical solution is：
A kind of desulfurization wastewater Zero emission device based on novel concentration technique, including：Pre-processing assembly, for useless to desulfurization
Water carries out pretreatment and removes removing heavy metals and sludge；Capacitive desalination module is connected with pre-processing assembly, receives pre-processing assembly and locates in advance
Desulfurization wastewater after reason, and concentration decrement treatment is carried out to desulfurization wastewater；Crystal system is connected with capacitive desalination module, uses
In being crystallized and/or be dried to desulfurization wastewater.
Further, pre-processing assembly includes the aerating regulation pond being connected and softening clarifying basin, and aerating regulation pond receives de-
Sulphur waste water passes through aerating regulation pond and softening clarifying basin sedimentation.
Further, the outlet for softening clarifying basin is connected with the entrance of sludge filter press, after sludge filter press receives sedimentation
Desulfurization wastewater, the outlet of the sludge for being discharged in desulfurization wastewater, sludge filter press is connected with aerating regulation pond, and desulfurization is useless
Water returns in aerating regulation pond.
Further, softening clarifying basin is also connected by pH-meter with clarification and effluent pond, and clarification and effluent pond passes through pH tune
It saves device and receives desulfurization wastewater, pH-meter is used to add catalyst into desulfurization wastewater to be discharged heavy metal ion, and by desulfurization
The pH value of waste water is adjusted to 8~9.
Further, clarification and effluent pond is connected by more medium filter with capacitive desalination module, and more medium filter connects
The desulfurization wastewater for receiving clarification and effluent pond, for removing the impurity in desulfurization wastewater.
Further, the outlet of more medium filter is connected with the entrance in aerating regulation pond, the backwash in more medium filter
Water is passed through in aerating regulation pond.
Further, capacitive desalination module includes that longitudinal uniform multiple electric field capacitances in parallel are de- inside the shell for shell and setting
Salt element, electric field capacitive desalination element include element shell and fixing axle, the ring between fixing axle and electric field capacitive desalination element
It is provided with multiple conductive layers and electrode in shape region, the first conduction is respectively arranged on the inside of the outside of fixing axle and shell
Layer and the second conductive layer, be respectively arranged with close to the outside of the first conductive layer and on the inside of the second conductive layer first electrode and
Second electrode is respectively arranged with the first PVC nets and the 2nd PVC nets, the first PVC on the inside of the outside of first electrode and second electrode
Net and the 2nd PVC net between be formed with for charged particle in desulfurization wastewater by inner flow passage.
Further, capacitive desalination module is connected with the rinsing module for rinsing concentration, and rinsing module is used for capacitance
Desalination module is passed through flushing water and is rinsed processing formation concentrated water, capacitive desalination mould to the desulfurization wastewater of electric field capacitive desalination element
The exit of block is connected with the water producing tank for collecting production water.
Further, the other end outlet of capacitive desalination module is connected with crystal system, and crystal system passes through de- to capacitance
The concentrated water of output enters crystal system generation distilled water and crystal salt after salt module is rinsed.
Further, the outlet end of crystal system is communicated with drying system, the crystallization that drying system generates crystal system into
Row is dry to generate crystal salt.
A kind of the advantages of desulfurization wastewater Zero emission device based on novel concentration technique of the utility model, is：Based on ring
The desulfurization wastewater zero-emission of shape capacitance concentration technique, using annular capacitor desalination module replace conventional reverse osmosis/electrodialysis into
Concentration after being pre-processed in the processing of row desulfurization wastewater is reduced work, can increase enriching section water yield, reduce the same of concentrated water amount
The tolerance of Shi Zengqiang equipment simplifies pretreatment and crystallizer, reduces operating cost and maintenance cost, reduces energy consumption and improves
Contamination resistance realizes the further innovation of desulfurization wastewater zero-discharge technology.
Description of the drawings
Fig. 1 is the process flow chart of the desulfurization wastewater zero-emission of the utility model；
Fig. 2 is the structural schematic diagram of the capacitive desalination module of the utility model；
Fig. 3 is the sectional view of the electric field capacitive desalination element of the utility model.
Specific implementation mode
In order to be better understood by the purpose of this utility model, structure and function, below in conjunction with the accompanying drawings, to the utility model
A kind of desulfurization wastewater Zero emission device based on novel concentration technique does further detailed description.
As shown in Figure 1 to Figure 3, it is shown as a kind of desulfurization wastewater zero-emission based on novel concentration technique of the utility model
Device, device include pre-processing assembly, capacitive desalination module 6 and crystal system 7, and capacitive desalination module 6 is used for useless to desulfurization
Water concentration decrement, pre-processing assembly, which is used to desulfurization wastewater pre-process, removes removing heavy metals and sludge, capacitive desalination module 6,
It is connected with pre-processing assembly, receives the pretreated desulfurization wastewater of pre-processing assembly, and carry out at concentration decrement to desulfurization wastewater
Reason；Crystal system 7 is connected with capacitive desalination module 6, for being crystallized and/or being dried to desulfurization wastewater.
Further, pre-processing assembly includes the aerating regulation pond 1 being connected and softening clarifying basin 2, and aerating regulation pond 1 receives
Desulfurization wastewater is settled by aerating regulation pond 1 and softening clarifying basin 2, and specifically, the initial pH value of desulfurization wastewater is 4~5, is contained
Have content and the hardness of the impurity such as suspended matter, COD, heavy metal higher, chlorion reaches 20000mg/L or more, desulfurization wastewater according to
It is secondary to be settled by aerating regulation pond 1 and softening clarifying basin 2.
Further, the outlet of softening clarifying basin 2 is connected with the entrance of sludge filter press 4, and sludge filter press receives sedimentation
The outlet of desulfurization wastewater afterwards, the sludge for being discharged in desulfurization wastewater, sludge filter press 4 is connected with aerating regulation pond 1, takes off
Sulphur waste water returns in aerating regulation pond 1.
Further, softening clarifying basin 2 is also connected by pH-meter with clarification and effluent pond 3, and clarification and effluent pond 3 passes through pH
Adjuster receives desulfurization wastewater, and pH-meter is used to add catalyst into desulfurization wastewater so that heavy metal ion is discharged, specifically comes
It says, addition Ca (OH) in the desulfurization wastewater that pH-meter is discharged to softening clarifying basin 22With saltcake (main component Na2SO4·
10H2O), the calcium ions and magnesium ions in desulfurization wastewater become CaSO4With Mg (OH)2Precipitation, fluorine ion generate calcium fluoride precipitate, and desulfurization is useless
Most of heavy metal ion in water, which become hydrate precipitation and precipitated from waste water, to be separated, and by the pH value of desulfurization wastewater
8~9 are adjusted to, clarification and effluent pond 3 after storing pretreatment softening clarification for producing water.
Further, clarification and effluent pond 3 is connected by more medium filter 5 with capacitive desalination module 6, more medium filter
5 receive the desulfurization wastewater in clarification and effluent pond 3, for removing the impurity in desulfurization wastewater.In addition, the outlet of more medium filter 5
It is connected with the entrance in aerating regulation pond 1, the backwash water in more medium filter is passed through in aerating regulation pond 1.
Further, capacitive desalination module 6 is crucial core equipment in the present invention, and capacitive desalination module 6 is in length
Cube is usually combined in use by two capacitive desalination modules 6 and forms a set of upgrading unit, in capacitive desalination module 6
For concentrating decrement treatment, the chlorion in water is down to 500mg/L hereinafter, producing water ratio is not less than 60%.Specifically, electric
It includes shell 61 to hold desalination module 6, and the electric field capacitive desalination element of multiple annulars is longitudinally uniformly arranged in parallel in shell 61
62, it is preferably internal to be provided with 25 ring electric field capacitive desalination elements (5x5 arrangements), reduce the expense of system maintenance, structure
It is compact durable, producing water ratio is improved, the purpose of desalination is realized.
Wherein, electric field capacitive desalination element 62 includes element shell 68 and fixing axle 63, and element shell 68 is in cylinder,
Using nonmetallic, it is preferred to use insulated heat material, to reduce internal-external heat exchanger and ensure that electrode does not weather.Fixing axle 63 is longitudinal
It is arranged in element shell 68, multiple conductions is provided in the annular region between fixing axle 63 and electric field capacitive desalination element 62
Layer 65 and electrode 65, electrode 65 use metal oxide/Active carbon fiber composite material, specifically, close to fixing axle 63
Outside and the inside of shell 68 are respectively arranged with the first conductive layer and the second conductive layer, close to the outside of the first conductive layer and close
First electrode and second electrode, the outside of first electrode and the inside of second electrode point are respectively arranged on the inside of second conductive layer
It is not provided with the first PVC nets and the 2nd PVC nets, PVC nets are coated on the surface of electrode, for preventing short circuit current, the first PVC nets
And the 2nd PVC net between be formed with for charged particle in desulfurization wastewater by inner flow passage 64.
The material of conductive layer 65 uses aluminium or copper, is tightly attached to the outside of electrode 66, is provided with the electricity being connected with external power supply
Source interface, first electrode and second electrode are connected with positive and negative DC voltage-stabilizing electricity respectively by conductive layer 65, be respectively formed positive plate and
Negative plate, not higher than the voltage value for generating hydrolysis, voltage is limited in 1~1.5V to ensure normal work external DC voltage-stabilizing electricity
Make, the voltage stabilization of electrode surface is uniform.Desulfurization wastewater neutralized by pre-processing assembly, settled, being flocculated, soften after be used as
Water inlet is passed through in capacitive desalination module 6, is in contact with positive and negative pole plate, the formation of inner flow passage 64 between positive plate and negative plate
The surface of the migration space of ion when capacitive desalination, positive plate and negative plate is covered with micropore and mesoporous, in desulfurization wastewater
Charged particle includes ion and organic particle, respectively towards the opposite electricity of symbol when ion is adsorbed to the surface of electrode 66
Ghandler motion is dynamic, and positively charged ion migrate and assembles to negative plate, and electronegative ion is assembled to positive plate, to positive electrode plate with
The inside of negative electrode plate forms electric double layer.
The fine particle adsorbed with capacitive desalination module 6 is on the increase, and particle is on the surface of the electrode plate of electric double layer
It coalesces and concentrates so that salt, colloidal solid or charge species rest on the surface of two electrodes in handled water, make
It obtains salt content in water will be greatly reduced, has achieved the purpose that salt is separated from water, purified production water can be obtained.Ion is in electrode
66 surface is constantly assembled and is concentrated, and the organic granular or other charge species in water are influenced by electric double layer, can be of short duration viscous
It is stagnant on the surface of electrode plate, this is because under the interference of highfield, electrode surface can generate that existence time is although short but to be had
The active material of extremely strong oxidisability, predominantly-OH hydroxyl radical free radicals, the organic pollution materials that some are difficult to degrade can be made more
It is easy to be decomposed, and non-secondary pollution will not be caused, obtain that organic pollution content is extremely low goes out while brine detaches
Water.
It is general to use two electricity simultaneously for carrying out concentration decrement treatment to desulfurization wastewater to ensure system continuous operation
Hold 6 combination of desalination module and forms a set of upgrading unit, when one of capacitive desalination module carries out desalting processing, another capacitance
Desalination module can be rinsed concentration.
Further, capacitive desalination module 6 is connected with the rinsing module for rinsing concentration, and rinsing module is used for capacitance
Desalination module 6 is passed through flushing water and is rinsed processing formation concentrated water to the desulfurization wastewater of electric field capacitive desalination element 62, and capacitance is de-
The exit of salt module 6 is connected with the water producing tank for collecting production water.
When the electric double layer intermediate ion of first electrode and second electrode formation in electric field capacitive desalination element 62 reaches saturation
When, the power supply that 65 surface of conductive layer applies is disconnected, electric field capacitive desalination element is carried out to being passed through flushing water in capacitive desalination module
62 flushings are handled, and the water outlet of more medium filter 5 can be used in flushing water, and water among capacitive desalination module can also be used, be adsorbed on
The ion and a small amount of flushing water on 66 surface of electrode are mixed to form concentrated water discharge capacitive desalination module 6.
In addition, can be reversed by simple current potential when electric field capacitive desalination element 62 regenerates or directly by current potential removal pair
The electrode of saturation absorption pollutant is cleared up, and comparative chemistry regeneration or hot recycling can effectively avoid caused by additive
Secondary pollution, this is obviously different from electrochemical degradation that is reverse osmosis, and can carrying out organic particle in the operating condition, further
Reduce other processing method problem encountered.
The utility model replaces existing conventional reverse osmosis/electrodialysis progress desulfurization useless using annular capacitor desalination module 6
Concentration after being pre-processed in water process is reduced work, can enhance dress while increasing enriching section water yield, reducing concentrated water amount
The tolerance set simplifies pretreatment and crystallizer, reduces operating cost and maintenance cost, reduce energy consumption and improve anti-pollution
Dye ability realizes the purpose of desulfurization wastewater zero-emission.
Further, the other end outlet of capacitive desalination module 6 is connected with crystal system 7, and crystal system 7 is by electricity
The concentrated water for holding output after desalination module 6 is rinsed enters crystal system generation distilled water and crystal salt.Distilled water returns in crystal system 7
To water producing tank.In addition, the outlet end of crystal system 7 is communicated with drying system 8, the crystallization that drying system 8 generates crystal system 7
Generation crystal salt is dried.
A kind of desulfurization wastewater Zero emission device based on novel concentration technique of the utility model is concentrated based on annular capacitor
The desulfurization wastewater zero-emission of technology replaces conventional reverse osmosis/electrodialysis to carry out desulfurization wastewater using annular capacitor desalination module
Concentration after being pre-processed in processing is reduced work, can enhance equipment while increasing enriching section water yield, reducing concentrated water amount
Tolerance, simplify pretreatment and crystallizer, reduce operating cost and maintenance cost, reduce energy consumption and simultaneously improve antipollution energy
Power realizes the further innovation of desulfurization wastewater zero-discharge technology.
The utility model is further described by specific embodiment above, it should be understood that, have here
The description of body, should not be construed as the restriction to the spirit and scope of the utility model, and one of ordinary skilled in the art is readding
The various modifications made to above-described embodiment after reader specification belong to the range that the utility model is protected.
Claims (10)
1. a kind of desulfurization wastewater Zero emission device based on novel concentration technique, which is characterized in that including：
Pre-processing assembly removes removing heavy metals and sludge for carrying out pretreatment to desulfurization wastewater；
Capacitive desalination module (6), is connected with pre-processing assembly, receives the pretreated desulfurization wastewater of pre-processing assembly, and to de-
Sulphur waste water carries out concentration decrement treatment；
Crystal system is connected with capacitive desalination module (6), for being crystallized and/or being dried to desulfurization wastewater.
2. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that pre-processing assembly includes being connected
Aerating regulation pond (1) and softening clarifying basin (2), aerating regulation pond (1) receive desulfurization wastewater and pass through aerating regulation pond (1) and softening
Clarifying basin (2) settles.
3. desulfurization wastewater Zero emission device according to claim 2, which is characterized in that softening clarifying basin (2) outlet with
The entrance of sludge filter press (4) is connected, and sludge filter press receives the desulfurization wastewater after sedimentation, for being discharged in desulfurization wastewater
The outlet of sludge, sludge filter press (4) is connected with aerating regulation pond (1), and desulfurization wastewater returns in aerating regulation pond (1).
4. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that softening clarifying basin (2) also passes through pH
Adjuster is connected with clarification and effluent pond (3), and clarification and effluent pond (3) receive desulfurization wastewater by pH-meter, and pH-meter is used
In adding catalyst into desulfurization wastewater so that heavy metal ion is discharged, and the pH value of desulfurization wastewater is adjusted to 8~9.
5. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that clarification and effluent pond (3) by being situated between more
Mass filter (5) is connected with capacitive desalination module (6), and the desulfurization that more medium filter (5) receives clarification and effluent pond (3) is useless
Water, for removing the impurity in desulfurization wastewater.
6. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that the outlet of more medium filter (5)
It is connected with the entrance of aerating regulation pond (1), the backwash water in more medium filter is passed through in aerating regulation pond (1).
7. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that capacitive desalination module (6) includes outer
Shell (61) and multiple electric field capacitive desalination elements (62) that longitudinal uniformly parallel connection is set in shell (61), electric field capacitive desalination member
Part (62) includes element shell (68) and fixing axle (63), the annular between fixing axle (63) and electric field capacitive desalination element (62)
Multiple conductive layers (65) and electrode (67) are provided in region, close to the outside of fixing axle (63) and the inside of shell (68) difference
It is provided with the first conductive layer and the second conductive layer, is set respectively close to the outside of the first conductive layer and close to the inside of the second conductive layer
It is equipped with first electrode and second electrode, the first PVC nets and are respectively arranged on the inside of the outside of first electrode and second electrode
Two PVC nets, the first PVC nets and the 2nd PVC net between be formed with for charged particle in desulfurization wastewater by inner flow passage (64).
8. desulfurization wastewater Zero emission device according to claim 1, which is characterized in that capacitive desalination module (6) be used for
The rinsing module for rinsing concentration is connected, and rinsing module is used to be passed through flushing water to capacitive desalination module (6) de- to electric field capacitance
The desulfurization wastewater of salt element (62) is rinsed processing and forms concentrated water, and the exit of capacitive desalination module (6) is connected with for receiving
The water producing tank of collection production water.
9. desulfurization wastewater Zero emission device according to claim 8, which is characterized in that capacitive desalination module (6) it is another
Mouth is brought out with crystal system (7) to be connected, crystal system (7) by capacitive desalination module (6) rinse after output concentrated water into
Enter crystal system and generates distilled water and crystal salt.
10. desulfurization wastewater Zero emission device according to claim 9, which is characterized in that the outlet end of crystal system (7) connects
It is connected with drying system (8), generation crystal salt is dried in the crystallization that drying system (8) generates crystal system (7).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302540A (en) * | 2020-02-27 | 2020-06-19 | 河北铄宇环保科技股份有限公司 | Thermal power plant desulfurization wastewater electrolytic adsorption treatment system and treatment method |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111302540A (en) * | 2020-02-27 | 2020-06-19 | 河北铄宇环保科技股份有限公司 | Thermal power plant desulfurization wastewater electrolytic adsorption treatment system and treatment method |
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