CN109502859A

CN109502859A - A kind of desulfurization wastewater processing equipment and its processing method

Info

Publication number: CN109502859A
Application number: CN201710830428.2A
Authority: CN
Inventors: 王开江
Original assignee: Shanghai Jiangzhe Environment Engineering Technology Co Ltd
Current assignee: Shanghai Jiangzhe Environment Engineering Technology Co Ltd
Priority date: 2017-09-15
Filing date: 2017-09-15
Publication date: 2019-03-22

Abstract

The invention discloses a kind of desulfurization wastewater processing equipment and processing methods, including pretreatment unit, VSEP Waste water concentrating unit and MVR waste water evaporation element, the pretreatment unit includes sequentially connected sewage collecting box, neutralizes case, electric flocculation device, filtering settling pond, intermediate water tank and decoloration device, the water inlet of the water outlet connection VSEP Waste water concentrating unit of the decoloration device, the water outlet of the VSEP Waste water concentrating unit connect MVR waste water evaporation element；Treated that waste water reaches standards for industrial water usage for inventive desulfurization sewage treatment equipment, can be with recycling and reusing；Inventive desulfurization wastewater treatment method treated sludge is handled without outward transport, reduces operating cost；Low energy consumption for inventive desulfurization wastewater treatment method, and land occupation is few, high-efficient.

Description

A kind of desulfurization wastewater processing equipment and its processing method

Technical field

The present invention relates to technical field of waste water processing more particularly to a kind of desulfurization wastewater processing equipments and its processing method.

Background technique

Increasingly strict with national environmental protection policy, wastewater treatment equipment is all thrown in most domestic thermal power plant, fire The waste water in power power plant mainly include the sewerage of recirculated cooling water, ash disposal waste water, desulfurization wastewater, chemical processing system draining, Coal handling system waste water plant area sanitary wastewater, oily waste water etc..Wherein desulfurization wastewater is weakly acidic, and suspended matter is high, and salt content is high, contains Heavy metal ion.

Existing domestic typical desulfurization wastewater processing technique includes following several:

A, pH value adjusts method

Milk of lime or other alkali electroless reagents (such as NaOH) are added in waste liquid, pH value is adjusted to 6-7, can effectively be gone Fluorine removal compound (generates CaF₂Precipitating) and part heavy metal.Then organic sulfur and PAC, PAM are added, pH value is transferred to 8-9, is made Metal is precipitated in the form of hydroxide and sulfide precipitation.

B, separation by precipitation

Desulfurization wastewater generally using be added soluble hydroxide such as NaOH, generate hydroxide precipitating come separating beavy metal from Son, in desulfurization wastewater processing, general control pH value makes some heavy metals such as iron, copper, lead, nickel and chromium generate hydrogen-oxygen in 8.5-9 Compound precipitating.It is general using dissolvable sulfide such as vulcanized sodium is added for heavy metals such as copper, mercury, so that it is generated Hg₂S 、CuS Deng precipitating, Solubility of Substances all very littles of this two kinds precipitatings, the solubility product order of magnitude is 10^-40-10^-50, vulcanized sodium is used for mercury, As long as addition is less than the S of 1mg/L^2-, just the mercury generation for being less than 1ug/L concentration is acted on, it, can in order to improve heavy metal precipitation process With the use of trivalent iron salt such as Fecl₃And PAC, PAM flocculation, accelerate the sedimentation of heavy metal.

PH value, which adjusts method and separation by precipitation, can remove the heavy metal in desulfurization wastewater, but sludge quantity is big, processing It is at high cost, and can only be discharged after wastewater treatment, it cannot achieve recycling.

Summary of the invention

It is big in order to solve to handle desulfurization wastewater sludge quantity in the prior art, at high cost, the problem of cannot achieve recycling, this The purpose of invention is to provide a kind of desulfurization wastewater processing equipment and its processing method.

To achieve the goals above, the present invention adopts the following technical scheme:

The first aspect of the present invention provides a kind of desulfurization wastewater processing equipment, including pretreatment unit, VSEP Waste water concentrating unit With MVR waste water evaporation element, the pretreatment unit includes sequentially connected sewage collecting box, neutralizes case, electric flocculation device, mistake Sedimentation basin, intermediate water tank and decoloration device are filtered, the water outlet of the decoloration device connects the water inlet of VSEP Waste water concentrating unit, The water outlet of the VSEP Waste water concentrating unit connects MVR waste water evaporation element.

Wherein, the electric flocculation device includes reaction tank, and the reaction tank side is equipped with water inlet, and another upper lateral part is equipped with Water outlet, bottom are equipped with sewage draining exit, are equipped with plate and cathode plate, the plate and cathode pole in the reaction tank Plate is separately connected positive pole and power cathode, and conductivity meter, the conductance are equipped between the plate and cathode plate Rate instrument, positive pole, power cathode are separately connected first control device.

Wherein, the first control device includes processor, electric bridge, operational amplifier and commutator, and the processor is logical It crosses conducting wire or electric bridge is connected by commutator, the electric bridge connects operational amplifier, and the processor connects conductivity meter, institute Operational amplifier connection positive pole is stated, the processor connects power cathode.

Wherein, the filtering settling pond includes pond body, and the pond body side is equipped with water inlet pipe, and the other side is equipped with outlet pipe, Central tube is equipped in the pond body, the water inlet pipe penetrates the central tube, surround central tube in the pond body and be provided with filtering Pond body is divided into settling zone and clear water zone by layer, the filter layer, and the pond body is cone-shaped structure, and the pond body is as bracket On, the pond body lower end is equipped with sewage pipe, and upper end connects outlet pipe, institute circumferentially arranged with overflow groove, the outside of the overflow groove The upper end for stating central tube is closed end, and lower end is equipped with flow distribution plate, and oviduct, the loudspeaker are equipped between the central tube and flow distribution plate The lower end of the upper end connection central tube of pipe, it is curved end, the curved end that the water inlet pipe, which is placed in one end inside central tube, Port be parallel to the horizontal plane, the filter layer is PP cotton filter layer, and the upper end of the filter layer is equipped with by several double end water Water cap layer made of cap tiling.

Wherein, the VSEP Waste water concentrating unit include sequentially connected sofening treatment unit, VSEP-UF processing unit, VSEP-NF processing unit, VSEP-RO processing unit.

Wherein, the film diameter of the VSEP-UF processing unit is 0.008-0.1 μm, the film diameter of the VSEP-NF processing unit It is 0.001-0.01 μm, the film diameter of the VSEP-RO processing unit is -0.001 μm of 30 dalton.

The second aspect of the present invention provides a kind of method for treating desulfurized wastewater, using above-mentioned processing equipment, including it is as follows Step:

S1 will be added highly basic, be neutralized in waste water；

Waste water after neutralisation treatment is carried out electric flocculation settlement treatment by S2, and the waste water after settlement treatment flows into filtering settling pond, Obtain the first clear liquid；

S3, the first clear liquid enter intermediate water tank and carry out oxidation processes；

S4, the waste water after oxidation processes carry out decolorization；

S5, the waste water after decolorization carry out sofening treatment, remove calcium and magnesium ion；

Desulfurization wastewater after softening is carried out micro-filtration processing by S6；

Micro-filtration treated desulfurization wastewater is carried out nanofiltration processing by S7；

Nanofiltration treated desulfurization wastewater is carried out reverse osmosis treatment, obtains dope and the second clear liquid by S8；

Dope is carried out the processing of MVR evaporation and concentration, obtains crystal salt by S9.

Wherein, the highly basic in the S1 is the sodium hydroxide dope of 30% mass concentration.

Compared with prior art, the present invention realize the utility model has the advantages that inventive desulfurization sewage treatment equipment that treated is useless Water reaches standards for industrial water usage, can be with recycling and reusing；Inventive desulfurization wastewater treatment method treated sludge is without outward transport Processing, reduces operating cost；Low energy consumption for inventive desulfurization wastewater treatment method, and land occupation is few, high-efficient.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, present invention be described in more detail:

Fig. 1 is the structural schematic diagram of inventive desulfurization sewage treatment equipment；

Fig. 2 is the structural schematic diagram of electric flocculation device in inventive desulfurization sewage treatment equipment；

Fig. 3 is the work flow diagram of the first control device of electric flocculation device in inventive desulfurization sewage treatment equipment；

Fig. 4 is the structural schematic diagram of filtering settling pond in inventive desulfurization sewage treatment equipment；

Fig. 5 is impact effect figure of the film diameter to interception rate of VSEP-UF processing unit；

Fig. 6 is the intake pressure of VSEP-NF processing unit and the relational graph of unit area water yield；

Fig. 7 is the vibration frequency of VSEP-NF processing unit and the relational graph in Membrane cleaning period；

Fig. 8 is the film temperature of VSEP-RO processing unit and the relational graph of salt rejection rate；

Fig. 9 is the intake pressure of VSEP-RO processing unit and the relational graph of membrane flux.

Wherein: pretreatment unit 1, VSEP Waste water concentrating unit 2, electric flocculation device 3, filtering settling pond 4, sewage collecting box 5, neutralization case 6, intermediate water tank 7, reaction tank 8, overflow groove 9, flow distribution plate 10, sewage draining exit 11, plate 12, cathode plate 13, Positive pole 14, power cathode 15, conductivity meter 16, first control device 17, processor 18, electric bridge 19, operational amplifier 20, Commutator 21, bracket 22, pond body 23, water inlet pipe 24, outlet pipe 25, central tube 26, PP cotton filter layer 27, settling zone 28, clear water Area 29, sewage pipe 30, water cap layer 31, oviduct 32, curved end 33, decoloration device 34, sofening treatment unit 35, at VSEP-UF Manage unit 36, VSEP-NF processing unit 37, VSEP-RO processing unit 38, MVR waste water evaporation element 39.

Specific embodiment

Such as Fig. 1, a kind of desulfurization wastewater processing equipment, including pretreatment unit 1, VSEP Waste water concentrating unit 2 and MVR waste water Evaporation element 39.

Pretreatment unit 1 include sewage collecting box 5, electric flocculation device 3, neutralize case 6, filtering settling pond 4, intermediate water tank 7, Decoloration device 34.

Desulfurization wastewater enters sewage collecting box 5, and supernatant flows into neutralization case 6, base sludge to sewage collecting box 5 after precipitation Gypsum dehydration machine is drained by sludge pump.

The NaOH solution that mass fraction is 30% is added in and in case 6, the dosage of NaOH solution is 0.0027g/L, is adjusted Weakly acidic solution in sewage collecting box 5 is adjusted to alkalescent, facilitates subsequent processing by pH to 9.The waste water neutralized in case 6 is logical It crosses water and is pumped to electric flocculation device 3, remove part heavy metal and suspended matter.

Electric flocculation device 3 includes reaction tank 8, and 8 one side bottom of reaction tank is equipped with water inlet, and another upper lateral part of reaction tank 8 is set Have a water outlet, bottom is equipped with sewage draining exit 11, be equipped with plate 12 and cathode plate 13 inside reaction tank 8, plate 12 with Cathode plate 13 is aluminum electrode plate, and plate 12 is respectively connected to positive pole 14 and electricity by conducting wire with cathode plate 13 Source cathode 15, is equipped with conductivity meter 16 between plate 12 and cathode plate 13, conductivity meter 16 passes through conducting wire connection first Control device 17.

First control device 17 includes processor 18, and processor 18 connects conductivity meter 16, and processor 18 passes through two kinds of sides Formula connects electric bridge 19, and a kind of mode is that electric bridge 19 is directly connected to by conducting wire, and another way is to connect electricity by commutator 21 Bridge 19, electric bridge 19 connect operational amplifier 20, and processor 18 converts resistance value for resistivity value and is delivered to electric bridge 19, electric bridge 19 Resistance change rate is converted into voltage and is sent to the progress operation of operational amplifier 20, obtains output voltage values, output voltage is through electricity Source anode 14 and power cathode 15 are forced between plate 12 and cathode plate 13.

The inside that the waste water in case 6 enters reaction tank 8 from the water inlet of 8 bottom of reaction tank is neutralized, conductivity meter 16 measures The conductivity value of supernatant out, and conductivity value signal is sent to processor 18, processor 18 records conductivity value, and will be electric Conductivity value is converted into resistance value and is sent to electric bridge 19, obtains positive pole 14 and electricity after electric bridge 19 and operational amplifier 20 calculate Voltage value between source cathode 15, voltage value between positive pole 14 and power cathode 15 with supernatant change in resistance And change.

Adsorption mechanism of the electric flocculation device 3 to suspended matter: plate 12 generates aluminium ion after the electrolysis of positive pole 14, Hydrone at cathode plate 13 occurs electrolysis and generates hydroxide ion, and aluminium ion generates aluminium hydroxide in conjunction with hydroxide ion Flock, aluminium hydroxide have very strong flocculation, can adsorb suspended matter in supernatant, increase the volume of flock constantly Add and finally sink to reaction tank 8, is discharged by sewage draining exit 11, the clear water generated after flocculation is discharged through water outlet.

The mechanism of the processing heavy metal of electric flocculation device 3: hydrone at cathode plate 13 occur electrolysis generate hydroxyl from Heavy metal ion forms the metal hydroxides of indissoluble and the complex compound of variform, the metal hydroxides in son, with water And the complex compound of variform constitutes glue core, collectively constitutes micelle in conjunction with counter ion, forms high molecular weight hydroxy product and further inhales Heavy metal ion in attached water, the heavy metal ion after absorption settle down under the effect of gravity, remove Fe to play³⁺、Zn² ⁺、Cu²⁺、Ni²⁺、Cr³⁺、Pb²⁺、Hg²⁺Etc. heavy metal ion.3 processed waste water water quality of electric flocculation device is (see treated waste water water Matter table) according to the size of supernatant conductivity value, electrode commutation conductivity value can be set, with the increase of electrolysis time, supernatant The conductivity of liquid constantly rises, and when rising to electrode commutation conductivity value, is connected between processor and commutation, positive pole 14 It is exchanged with power cathode 15, is adsorbed on the meeting Automatic-falling after change poles of the pollutant on plate 12, is acted in electric flocculation It is lower that reaction tank 8 is discharged through sewage draining exit, it ensure that the enrichment on pole plate there is no pollutant, improve the service life of pole plate.

By treated waste water the enters filtering settling pond 4 of electric flocculation device 3, filtering settling pond 4 includes pond body 23, pond body 23 be cone-shaped structure, and for pond body 23 as on bracket 22, lower end is equipped with sewage pipe 30, and upper end is overflow circumferentially arranged with overflow groove 9 The outside of sink 9 connects outlet pipe 25, and the inside of pond body 23 is equipped with central tube 26, and the upper end of central tube 26 is closed end, center The lower end of pipe 26 is equipped with flow distribution plate 10, is equipped with oviduct 32 between central tube 26 and flow distribution plate 10, the side of pond body 23 be equipped with into The mouth of a river, water inlet pipe 24 pass through water inlet and vertically connect and penetrate the central tube 26, and water inlet pipe 24 is placed in inside central tube 26 One end is curved end 33, and the port of curved end 33 is parallel to the horizontal plane, and central tube 26 is provided with PP cotton in the pond body 23 Filter layer 27, PP cotton filter layer 27 divide pond body 23 for settling zone 28 and clear water zone 29, the upper end of PP cotton filter layer 27 be equipped with by Water cap layer 31 made of the tiling of several double end water caps.

The course of work of filtering settling pond 4: sewage flows into central tube 26 by water inlet pipe 24, flows from top to bottom through central tube 26 Out, settling zone 28 is uniformly entered under the effect of flow distribution plate 10, sewage slowly rises along settling zone 28, and the particulate matter in sewage exists Gravity is lowered into the bottom of pond body 23, forms sludge, and sludge is discharged outside pond through sewage pipe 30, and density is less than water in sewage The particle that particle and sinking speed are less than the water flow rate of climb can be moved upwards with water flow, rise to 27 quilt of PP cotton filter layer PP cotton filter layer 27 intercepts, and clear water uniformly rises to overflow groove 9 by water cap layer 31, collects and is imported to outlet pipe through overflow groove 9 25, it is discharged through outlet pipe 25.

Filtering settling pond 4 of the invention will be precipitated and is combined as a whole with the function of filtering, realize particulate matter and clear liquid in sewage Quick separating, filtration time is shorter compared with the existing technology, and filter efficiency is higher, be separated by solid-liquid separation it is more thorough, reduce and apply Requirement during work to pond depth, reduces the cost of sedimentation basin.

The first clear liquid obtained after the processing of filtering settling pond 4, is expelled to intermediate water tank 7 through outlet pipe 25.

The dosage that the dosage of NaCIO and dense HCl, NaCIO are the dense HCl of 0.0027g/L is added into intermediate water tank 7 is The outlet of 0.0036g/L, stirring, intermediate water tank 7 connect decoloration device 34.The present invention does not limit decoloration device 34 particularly System, any equipment that decoloration may be implemented are applicable in.Water distributor is provided in currently preferred decoloration device 34, under water distributor Mushroom water collector is arranged in end setting filter, filter bottom end.The water that intermediate water tank 7 is discharged is laggard by three layers of water distributor Enter filter, the setting of three layers of water distributor guarantees decolorizing effect so that water flows into filter with the state of advection, in filter Packing layer intercepts foreign pigment in water, and the water of intercept process is equably flowed out by water collector.

Treated the waste water of decoloration device 34 is sent into VSEP Waste water concentrating unit 2.

VSEP is the abbreviation of overclocking vibration membrane filtration system, is generated in filter membrane surface high by mechanical high-frequency vibration " dynamic " membrane separation technique of shearing force.By the overclocking vibration that membrane module generates, high shear force is generated in film surface, makes feed liquid In macromolecular substances be difficult to form gel layer in film surface, reduce concentration polarization and the absorption accumulation of film surface, it is stifled to reduce film The generation of plug and contamination phenomenon.VSEP-UF processing unit 36 is overclocking vibration film microfiltration systems, VSEP-NF processing unit 37 For overclocking vibration film nanofiltration system, VSEP-RO processing unit 38 is overclocking vibration film counter-infiltration system.

VSEP Waste water concentrating unit 2 includes sofening treatment unit 35, VSEP-UF processing unit 36, VSEP-NF processing unit 37, VSEP-RO processing unit 38.Treated the waste water of decoloration device 34 is sent into sofening treatment unit 35, the present invention to softening at There is no particular limitation for the concrete configuration of reason unit 35, can be using conventional sofening treatment equipment.In sofening treatment unit 35 Contain a large amount of CO₃ ^2-And OH^-, so that the Ca in waste water²⁺、Mg²⁺Precipitating reduces the hardness of waste water, the processing of sofening treatment unit 35 Waste water afterwards passes through water pump lifting to VSEP-UF processing unit 36.

The film diameter of VSEP-UF processing unit 36 is 0.008-0.1 μm, and intake pressure is controlled in 0.03mpa-0.6mpa, VSEP-UF vibration frequency be 20-50HZ, vibration noise≤80 point, bearing revolving speed control 2800-3100 revs/min, pass through VSEP-UF processing unit 36 retains suspended matter, larger molecular organics and the bacterium in waste water, the film of VSEP-UF processing unit 36 Diameter rejection effect is influenced it is obvious, if film diameter that Fig. 5 is VSEP-UF processing unit 36 is to the impact effect figure of interception rate, from Fig. 5 In it is found that when film diameter is less than 0.008 μm, interception rate is close to 90%, and for film diameter between 0.008 μm -0.1 μm, interception rate is close 80%, as film diameter continues growing, interception rate linearly declines.The replacement when size of film diameter and the production cost of film and use Number is related, and film diameter is smaller, and production cost is higher, more using same time replacement number；Film diameter is bigger, and production cost is got over Low, replacement number is fewer, comprehensively considers interception rate, production cost and replacement number, the film diameter of VSEP-UF processing unit 36 is limited It is set to 0.008-0.1 μm.

Treated that waste water is sent to VSEP-NF processing unit 37, VSEP-NF processing unit 37 for VSEP-UF processing unit 36 Film diameter be 0.001-0.01 μm, intake pressure control is in 0.2mpa-1.6mpa, VSEP-NF vibration frequency 20-50HZ, vibration Noise≤80 point, bearing revolving speed control 2800-3100 revs/min, by VSEP-NF processing unit 37 retain waste water in it is small Molecular organic and high price salt.

It, can from Fig. 6 such as the relational graph of intake pressure and unit area water yield that Fig. 6 is VSEP-NF processing unit 37 Know, as intake pressure < 0.2MPa, unit area water yield is 5-50L, and working efficiency is low at this time, can not produce practical need It wants；As intake pressure > 0.2Mpa, unit area water yield increases, but the increase of intake pressure, to the leakproofness of equipment And the performance requirement of the pump housing increases, therefore select intake pressure for 0.2Mpa-1.6Mpa.

As Fig. 7 be VSEP-NF processing unit 37 vibration frequency and the Membrane cleaning period relational graph, as can be known from Fig. 7, when When vibration frequency is lower than 20Hz, the Membrane cleaning period was less than 5 days, that is, film choking phenomenon occurred less than 5 days using the time, influenced The normal use of film shows that when vibration frequency is too low, VSEP-NF processing unit 37 is similar to static membrane separation, and film obstruction is tight Weight；When vibration frequency is in 20-30Hz, the Membrane cleaning period is dramatically increased, until the Membrane cleaning period reaches when vibration frequency is 30Hz By 15 days, vibration frequency is continued growing, until the Membrane cleaning period is 20 days when vibration frequency reaches 50Hz.Membrane cleaning number is excessive, Cleaning frequency is excessively high not only to bring human cost to increase, and can also reduce production efficiency, therefore select vibration frequency for 20Hz- 50Hz。

37 rate of recovery of VSEP-NF processing unit reaches 80%, produces water and enters VSEP-RO processing unit 38, VSEP-RO processing The film diameter of unit 38 is -0.001 μm of 30 dalton, and intake pressure is controlled in 2.3mpa-3.0mpa, VSEP-RO vibration frequency 20- 50HZ, vibration noise≤80 point, bearing revolving speed control 2800-3100 revs/min.

Such as the relational graph of film temperature and salt rejection rate that Fig. 8 is VSEP-RO processing unit 38.When film temperature is 5-25 DEG C, Salt rejection rate reaches 100%, and film temperature increases therewith, and salt rejection rate sharply declines, and when film temperature is 40 DEG C, salt rejection rate is almost nil, Illustrate that inorganic salts all dissolve at this time, the separation of inorganic salts can not be realized by VSEP-RO processing unit 38.Comprehensively consider desalination Rate and production are practical, select film temperature for 15-25 DEG C.

As Fig. 9 be VSEP-RO processing unit 38 intake pressure and membrane flux relation curve, as can be known from Fig. 9, when into When water pressure < 2Mpa, membrane flux < 10L/m², few by the Fluid Volume on unit area, filter efficiency is low, and filtration time is long, High production cost；As intake pressure increases, membrane flux increases, and when intake pressure is 2.3mpa-3.0mpa, membrane flux is close 25 L/m², the rate of filtration is fast at this time, greatly reduces filtration time.

VSEP-RO processing unit 38 retains salts various in waste water, organic matter, trace amount, trace metal, VSEP-RO Dope and the first clear liquid are obtained after the processing of processing unit 38, the conductivity of the first clear liquid is 10-100us/cm, reaches industrial water Standard can be entered MVR waste water evaporation element 39 with cycling and reutilization, dope and be condensed into salt, and purity is >=98%, can directly again It utilizes.

The above specific embodiments are only exemplary, is to preferably make skilled artisans appreciate that originally Patent, be not to be construed as include to this patent range limitation；As long as appointing made by the spirit according to disclosed in this patent How with change or modification, the range that this patent includes is each fallen within.

Claims

1. a kind of desulfurization wastewater processing equipment, including pretreatment unit (1), VSEP Waste water concentrating unit (2) and the evaporation of MVR waste water Unit (39), the pretreatment unit (1) include sequentially connected sewage collecting box (5), neutralize case (6), electric flocculation device (3), the water outlet of filtering settling pond (4), intermediate water tank (7) and decoloration device (34), the decoloration device (34) connects VSEP The water outlet of the water inlet of Waste water concentrating unit (2), the VSEP Waste water concentrating unit (2) connects MVR waste water evaporation element (39).

2. desulfurization wastewater processing equipment as described in claim 1, which is characterized in that the electric flocculation device (3) includes reaction Pond (8), reaction tank (8) side are equipped with water inlet, and another upper lateral part is equipped with water outlet, and bottom is equipped with sewage draining exit (11), institute It states and is equipped with plate (12) and cathode plate (13) in reaction tank (8), the plate (12) and cathode plate (13) point Not Lian Jie positive pole (14) and power cathode (15), equipped with conductivity between the plate (12) and cathode plate (13) Instrument (16), the conductivity meter (16), positive pole (14), power cathode (15) are separately connected first control device (17).

3. desulfurization wastewater processing equipment as claimed in claim 2, which is characterized in that the first control device (17) includes place Device (18), electric bridge (19), operational amplifier (20) and commutator (21) are managed, the processor (18) is by conducting wire or by changing Electric bridge (19) are connected to device (21), the electric bridge (19) connects operational amplifier (20), and the processor (18) connects conductivity Instrument (16), the operational amplifier (20) connect positive pole (14), and the processor (18) connects power cathode (15).

4. desulfurization wastewater processing equipment as described in claim 1, which is characterized in that the filtering settling pond (4) includes pond body (23), pond body (23) side is equipped with water inlet pipe (24), the other side is equipped with outlet pipe (25), is equipped in the pond body (23) Heart pipe (26), the water inlet pipe (24) penetrate the central tube (26), are provided in the pond body (23) around central tube (26) Pond body is divided into settling zone (28) and clear water zone (29) by filter layer, the filter layer, and the pond body (23) is cone-shaped structure, institute Pond body (23) is stated as on bracket (22), pond body (23) lower end is equipped with sewage pipe (30), and upper end is circumferentially arranged with overflow groove (9), the outside of the overflow groove (9) connects outlet pipe (25), and the upper end of the central tube (26) is closed end, and lower end, which is equipped with, to be divided Flowing plate (10) is equipped with oviduct (32) between the central tube (26) and flow distribution plate (10), and the upper end of the oviduct (32) connects The lower end of central tube (26) is connect, it is curved end (33) that the water inlet pipe (24), which is placed in the internal one end of central tube (26), described curved The port of curved end (33) is parallel to the horizontal plane, and the filter layer is PP cotton filter layer (27), the upper end of the filter layer be equipped with by Water cap layer (31) made of the tiling of several double end water caps.

5. desulfurization wastewater processing equipment as described in claim 1, which is characterized in that VSEP Waste water concentrating unit (2) packet Include sequentially connected sofening treatment unit (35), VSEP-UF processing unit (36), VSEP-NF processing unit (37), VSEP-RO Processing unit (38).

6. desulfurization wastewater processing equipment as claimed in claim 5, which is characterized in that the VSEP-UF processing unit (36) Film diameter is 0.008-0.1 μm, and the film diameter of the VSEP-NF processing unit (37) is 0.001-0.01 μm, the VSEP-RO processing The film diameter of unit (38) is -0.001 μm of 30 dalton.

7. a kind of method for treating desulfurized wastewater, using processing equipment described in any one of claims 1-6, which is characterized in that packet Include following steps:

S1 will be added highly basic, be neutralized in waste water；

Waste water after neutralisation treatment is carried out electric flocculation settlement treatment by S2, and the waste water after settlement treatment flows into filtering settling pond (4), the first clear liquid is obtained；

S3, the first clear liquid enter intermediate water tank (7) and carry out oxidation processes；

S4, the waste water after oxidation processes carry out decolorization；

8. method for treating desulfurized wastewater as claimed in claim 7, which is characterized in that the highly basic in the S1 is that 30% mass is dense The sodium hydroxide dope of degree.