CN207451807U - Desulphurization for Coal-fired Power Plant waste water integrates fluoride-removing equipment - Google Patents

Abstract

Desulphurization for Coal-fired Power Plant waste water integrates fluoride-removing equipment, it relays pond (1) and jogging slot (2) while connects into slow mixed slot (3), slowly mixed slot (3) is connected into precipitation tank (4), precipitation tank (4) difference connection extruder (5) and medial launder (7), overcritical electric coagulation apparatus (8) are sequentially connected by medial launder (7) and change mixed inclination plate settling facility (9), change mixed inclination plate settling facility (9) connection extruder (5) and activated alumina equipment (10) respectively, activated alumina equipment (10) access releases pond (6).Equipment has the multiple degradings effect such as electrocoagulation, electric floating and electrochemical redox simultaneously during waste water is handled, improve the removal rate of pollutant, concentration polarization and prevention electrode passivation problem are reduced, significantly extend electrode life and improves electric current conduction efficiency.The fluorine-containing sludge settleability obtained in wastewater treatment process is good, and dewatering is good and sludge quantity greatly reduces, and realizes fluorine-containing sludge minimizing.

Description

Desulphurization for Coal-fired Power Plant waste water integrates fluoride-removing equipment

Technical field

The utility model is related to coal-burning power plant's sewage disposal technology, especially Desulphurization for Coal-fired Power Plant waste water synthesis fluorine removals to set It is standby.

Background technology

Coal-burning power plant can generate substantial amounts of oxysulfide (SOx), such as sulfur dioxide during coal fired power generation is used (SO₂), in order to remove the sulfur dioxide in flue gas, coal-burning power plant can use exhaust gas desulfurization (FGD, Flue Gas Desulfurization) equipment is carried out by a large amount of divalent alkaline-earth metal industrial waters are extracted with the sulphur-containing exhaust gas in flue gas Desulphurization reaction, then discharge will be handled by the acid waste water containing sulfate radical after " desulfurization " reaction, hereinafter referred to as desulfurization is given up Water.The ingredient of the desulfurization wastewater is more than 20000mg/L containing concentration, i.e. the sulfate ion of 20000ppm, concentration is more than The chlorion of 600ppm, fluorine ion and concentration of the concentration between 50~200ppm are outstanding between 1000~4000ppm Floating solid (Suspended Solid), hereinafter referred to as SS ingredients, additionally containing a large amount of metal magnesium ions.

In recent years, requirement of the national governments for environmental standard, water standard is increasingly severe, China《Composite wastewater discharges Standard》Regulation, for containing the discharge water of 50~200ppm fluorine ions, hereinafter referred to as fluoride waste, also requirement needs height net Change to content of fluoride ion and be down to below 10ppm, can just be discharged into sea.

Technology of Fluoride Removal mainly includes absorption method, ion-exchange, electrochemical process and chemical method etc. both at home and abroad at present.Absorption method Technology of Fluoride Removal is generally only used for drinking water defluorination of the fluorine content less than 10mg/L and handles, and of high cost, is not suitable for flood Measure industrial wastewater fluorine removal field；Ion-exchange is the exchange capacity using ion exchange resin, goes one of fluorine ion in water removal Kind of method, compound resin fluoride removing rate is high, can regenerate, and removal efficiency can be reduced by being disadvantageous in that in the presence of other anion, Resin regeneration can cause fluorine concentrate discarded object, it is necessary to be pocessed to abandon again；Electrochemical process includes electrocoagulation and electricity The shortcomings that dialysis, electrocoagulation need to be operated through separation of solid and liquid, and the water discharge of enriched chamber pollutes in electroosmose process also limits The practical application of electrochemical process；Chemical precipitation method technology of Fluoride Removal is one of common technique in engineering, as shown in Figure 1, is taken off Mixed slot 3 and precipitation tank 4 slowly are sequentially entered behind the repeated pond 1 of sulphur waste water and jogging slot 2, excluding precipitating sludge by precipitation tank 4 enters Extruder 5 is handled, and shunting treatment fluid introducing releases outer row behind pond 6.The technique in high fluorine wastewater treatment using more, wherein throwing The method for adding lime is that a kind of cost is relatively low, widely used defluorination method, but this method comes with some shortcomings part, such as by In the lime itself the characteristics of, cause that lime utilization rate is low, dosage is big, water outlet fluorine ion is difficult to be removed to reduced levels；Coagulation Sedimentation is also common defluorinating process, and for desulfurization wastewater, traditional coagulant precipitation method is to add aluminum sulfate or liquid caustic soda, but meeting A large amount of grease states, the sludge of settleability difference are formed, such moisture percentage in sewage sludge is high, separation of solid and liquid is difficult, and generates many grain sizes Tiny particulate matter pollutes the problems such as object outlet effect is bad, and sludge is difficult to reuse and big stockpiling occupation of land, forms secondary Solid waste pollutes.On the other hand, since the fluorine element overwhelming majority in wastewater treatment is finally all entered in sludge, in sludge Fluorine content it is higher, in storage, transport and disposal process, it is easy to cause more serious and extensive secondary pollution, and this Kind to the pollution of soil and groundwater once being formed, it is very big to recover difficulty.

The related art scheme of solution more than technical problem discloses less.

Chinese patent application 201610301503.1 provides a kind of desulfuration waste water treatment process, comprises the following steps：1) Water quality adjustment slot；2) precipitation tank in term；3) precipitation tank；4) fluorine removal reactive tank；5) defecator；6) neutralization chamber；7) film process unit； 8) letdown tank.Reducing substances (COD) in waste water, Cr VI, fluorine ion etc. are effectively removed.At certain power plant desulfurization wastewater Exemplified by reason, by the integrated use of the techniques such as neutralization reduction, effluent index COD is low less than 100mg/L, Cr VI in actual motion It is less than 10 mg/L in 0.5 mg/L, fluorine ion.

Chinese patent application 201610025645.X discloses a kind of method for treating desulfurized wastewater, and step 1) desulfurization wastewater enters In aerating regulation pond, under aerator effect, the sulfite ion in desulfurization wastewater is oxidized to sulfate ion；Step 2) pH regulating boxs are then sent to, the feeding lime into pH regulating boxs removes temporarily hard；Step 3) in first order reaction flow tank, The heavy metal that cannot be precipitated out with hydroxide form is further precipitated by adding in organic sulfur；Step 4) is being divided into two lattice one In grade flocculation tanks, coagulant is added in, cohesion forms many small flocculates；Step 5) input level-one clarifying basin is used for generation The suspended matter of itself carries out precipitation separation in flocculate and waste water；Soda ash and hydrogen-oxygen are added in step 6) second order reaction flow tank Change sodium solution, precipitate the calcium ion in waste water and remaining magnesium ion；Two level clarifying basin is used to sink to the flocculate of generation It forms sediment and separates；More medium filter produces water by spiral atomizer, sprays into flue vaporization.

A kind of 201410067893.1 power plant desulfurization wastewater processing method of Chinese patent application, provides and utilizes nano-tourmaline A kind of power plant desulfurization wastewater processing method of haydite electric flocculation light electrolysis ultrasonic wave filter tank membrane reactor.Power plant desulfurization wastewater enters Raw water regulating reservoir stabilizing water quantity and water quality；The water outlet of raw water regulating reservoir is passed through into nano-tourmaline haydite electric flocculation light electrolysis ultrasound Ripple filter tank removes suspended solid and impurity, and decomposable asymmetric choice net chemical substance is decomposed；Nano-tourmaline haydite electric flocculation light electrolysis The water outlet of ultrasonic wave filter tank enters film filtering reactor；Nano-tourmaline haydite electric flocculation light electrolysis ultrasonic wave spent filter backwash water returns It flow to raw water regulating reservoir；Film filtering reactor water outlet enters charcoal canister absorption residual impurity and colourity, charcoal canister water outlet into Row reuse.Chemical agent need not be added, only consumes electric energy, its processing cost, desulfurization wastewater is greatly lowered in non-secondary pollution It can reach reclaimed water reuse standard after processing, producing water ratio is high.

Chinese patent application 201510483875.6 discloses a kind of processing method and system of wet-type magnesium method desulfurization waste water, main It to be designed to improve desulfurization wastewater treatment effect.It gives up including at least Air Exposure adjusting desulfurization is carried out to the desulfurization wastewater The pH value of water is 10, and to adding phosphate in the desulfurization wastewater, zeolite powder removes ammonia nitrogen, to adding stone in the desulfurization wastewater Organic matter, colourity, phosphate, fluoride, the heavy metal that ash, molysite removal coal combustion generate, adjust desulfurization wastewater PH to 7.Make The removal rate of COD in desulfurization wastewater is increased to more than 95%, ammonia nitrogen removal frank to more than 90.

Chinese patent application 201210367061.2 is related to the multistep treatment field of waste water, is specially that one kind is used for wet method cigarette Desulfurization gives up water purifying means and its application method.A kind of purifier for wet flue gas desulfurization waste water, including waste water Regulating tank (1) further includes reaction flocculation tank (2), sedimentation basin (31), level-one fluorine removal reactive tank (41), two level fluorine removal reactive tank (42) etc..It carries out successively as follows：A. water quality and quantity is adjusted；b.Cr⁶⁺Reduction and the reaction of heavy metal ion are flocculated；c. Level-one precipitates；D. fluorine removal reaction and COD degradation；E. two-stage precipitation；F. neutralization reaction；G. sand filtration is handled；H. draining.

Chinese patent application 201310555063.9 is related to desulfurization wastewater " zero-emission " processing method, utilizes reverse osmosis concentrated salt Dosing, the concentration of sediment film in water pretreatment process are combined with seawater film and anti-pollution high-pressure membrane, are contained what high-pressure membrane came out The strong brine of salt amount about 15~20% and the flyash reactive crystallization of grey field, form at the desulfurization wastewater " zero-emission " of complete set Science and engineering process system not only makes the foreign ions such as the suspended matter in desulfurization wastewater, heavy metal, fluorine be gone in the form of precipitating pollutant Remove, and the production water of 78%~90% rate of recovery can be reached, make other of chlorion and its dissolving ion stay in about 10~ In 20% strong brine, this part strong brine carries out sprinkling processing since water is less, for the grey field of industrial and mining enterprises, investment And operating cost can be well below the only progress pretreated evaporation treatment process of dosing.

Chinese patent application 201010196948.0 discloses a kind of method and dress of electric flocculation recovering and processing desulfurized wastewater It puts, then desulfurization wastewater carries out separation of solid and liquid, the clarification and effluent after separation is back to power plant through collecting into electric flocculation reactor Rush ash-slag disposal system or directly discharge, body refuse is transported to sludge treating system and is dehydrated, the effluent recycling of sludge treating system To water inlet system.The pollutant in waste water can be effectively removed, to the handling rate of heavy metal up to 95%~99%, the processing to chlorine Rate is up to removal rates such as more than 80%, COD, ammonia nitrogens up to more than 90%.

Chinese patent application 201510510203.X is related to SS that is a kind of while removing desulfurization wastewater middle and high concentration, fluorination Object, sulfate, the processing unit and processing method of arsenate and COD.The characteristics of processing unit is：Sedimentation basin overflow port passes through pipe Road is connected with No.1 delivery pump, and primary-clarifiers agitating device is mounted on primary-clarifiers, No. two delivery pumps by pipeline and 3rd reaction chamber connects.The step of processing method is：After desulfurization wastewater enters sedimentation basin progress primary precipitation, water outlet sequentially enters First reaction chamber, the second reaction chamber carry out chemistry-coagulating sedimentation reaction, enter back into primary-clarifiers and carry out separation of solid and liquid；Supernatant Liquid introduces the 3rd reaction chamber, and the mixed liquor after reaction sequentially enters flocculation tanks, Secondary clarifier again, carry out respectively flocculation reaction and Clarification concentration；Supernatant introduces filter device and is filtered, and it is 6~9 that water outlet, which adjusts pH,.

Chinese patent application 200920146366.4 is disclosed in a kind of field of Environment Protection water treatment system, suitable for boiler smoke The waste water treatment system device used in desulfurization, denitration wastewater processing system.In the system and device, there is provided waste water tune Save case, integrated box, fluorine removal reaction chamber, clarifier, sludge concentrator, sludge storage tank, plate and frame filter press, bucket and it is a variety of automatic plus Medicine device, system automation degree is high, employs PLC closed loop measurement and controls and PID is adjusted.

Although three kinds of technologies such as overcritical electricity coagulation, the mixed inclined plate sedimentation of change and Defluorination of Formation Mater By Adsorption On Activated Alumina absorption respectively have accordingly The scope of application all sporadically appears in open source literature, but in terms of desulfurization wastewater fluorine removal, this three kinds of technologies do not disclose usability methods.

Utility model content

The purpose of this utility model is to provide Desulphurization for Coal-fired Power Plant waste water synthesis fluoride-removing equipment, overcomes prior art defect, On the premise of ensureing that water outlet fluorine ion is up to standard, added amount of chemical is reduced, reduces cost, what is obtained in wastewater treatment process is fluorine-containing Sludge settling is good, and dewatering is good and sludge quantity greatly reduces, and realizes fluorine-containing sludge minimizing.

The purpose of this utility model will be realized by following technical measures：Relaying pond and jogging slot are connected simultaneously into slow mixed Slot mixes slot and connects into precipitation tank, precipitation tank difference connection extruder and medial launder slowly, and it is mixed to be sequentially connected overcritical electricity by medial launder Solidifying equipment and the mixed inclination plate settling facility of change, change mixed inclination plate settling facility difference connection extruder and activated alumina equipment, activate The access of aluminium oxide equipment releases pond.

Especially, pond and jogging slot are relayed respectively by being connected simultaneously into slow mixed slot.

Especially, change mixed inclination plate settling facility and connect extruding by sludge pump with slow mixed pipeline by mixing pipeline soon respectively Machine.

Especially, intake pump and water outlet pump are connected respectively before and after overcritical electric coagulation apparatus.

Especially, high frequency pulse power supply is installed, high-frequency repeats " power supply-power-off power supply " mistake in overcritical electric coagulation apparatus Journey, conduction time, which is less than, is electrolysed total reaction time, and dissolving metal amount is less than DC electrolysis meltage, every one identical time The ripple sent, is mutated in a short time, is then rapidly returned to the physical quantity of its initial value again；At the same time, direct impulse is followed by Reverse impulse keeps the variation of the two poles of the earth periodic reverse.

The advantages of the utility model and effect：On the basis of carrying out Wastewater by Electric flocculating principles using electrolytic cell, high frequency arteries and veins is merged Technology is rushed, overcritical electric coagulation, the mixed inclined plate sedimentation of change and Defluorination of Formation Mater By Adsorption On Activated Alumina are adsorbed the mutually coordinated support of three kinds of technologies unites Be integrated, overcome prior art defect, make full use of the advantage of each technology, make equipment during waste water is handled simultaneously With the multiple degradings effect such as electrocoagulation, electric floating and electrochemical redox, the removal rate of pollutant is substantially increased, together When reduce concentration polarization and prevention electrode passivation problem, significantly extending electrode life simultaneously improves electric current conduction efficiency.Wastewater treatment The fluorine-containing sludge settleability obtained in the process is good, and dewatering is good and sludge quantity greatly reduces, and realizes fluorine-containing sludge minimizing. Processing procedure simple and effective, operating automation degree are high.Stable equipment operation is reliable, and low energy consumption, and operating cost is low, environmental-protecting performance It is good, ensure that water outlet reaches discharge standard, and a large amount of medicaments can be saved.

Description of the drawings

Fig. 1 is desulfurization wastewater fluoride-removing equipment structure diagram in the prior art.

Fig. 2 is that desulfurization wastewater integrates fluoride-removing equipment structure diagram in the utility model embodiment 1.

Fig. 3 is the high-frequency impulse operation principle schematic diagram of overcritical electric coagulation apparatus in the utility model.

Reference numeral includes：

Relaying pond 1, jogging slot 2, slowly mixed slot 3, precipitation tank 4, extruder 5, release pond 6, medial launder 7, overcritical electric coagulation Equipment 8 changes mixed inclination plate settling facility 9, activated alumina equipment 10.

Specific embodiment

The utility model principle is, for the characteristics of fluorine-containing excursion is wider in Desulphurization for Coal-fired Power Plant waste water, first, Since desulfurization wastewater is to wash buck from coal-burning power plant, itself contain more lime-ash and sludge components, if without preliminary Precipitation directly carries out overcritical electric coagulating treatment, then seriously affects electric coagulation effect；Secondly, fluorinion concentration in desulfurization wastewater It is larger so as to generate sludge quantity, it is necessary to add in the excessive mixed inclined plate sedimentation of liquid caustic soda progress during ＞ 120mg/L.And desulfurization is given up In water contain be more than the substantial amounts of sulfate ions of 20000mg/L and a large amount of metal magnesium ions, if by many experiments the results show that Liquid caustic soda sedimentation is directly added into, then easily generates sulfuric acid magnesium precipitate, increases sludge quantity, and contains a large amount of sodium sulphate, hydrogen-oxygen in sludge Change magnesium, then so that sludge is difficult dehydration, however use overcritical electric coagulation apparatus, by discharged on quick exciting electrode plate from Son, electrolysis form " tiny flocculation agent " the i.e. hydroxide of aluminium, precipitation, reaction time are quickly formed with fluorine ion in desulfurization wastewater It is short, the formation of sulfuric acid magnesium precipitate is avoided, sludge quantity is smaller, and the conditions such as comprehensive power consumption and aluminium sheet consumption are weighed, and overcritical electricity is mixed Solidifying fluorine removal can only make fluorine ion be down to tens of ppm；In addition, when fluorinion concentration is down to tens of ppm, adds appropriate liquid caustic soda and carry out Change mixed inclined plate sedimentation, fluorine ion can be down within 10mg/L, many experiments the results show that add in liquid caustic soda by fluorinion concentration by When 10mg/L or so is down to 1~2mg/L, a large amount of liquid caustic soda need to be added in, it is excessive to generate sludge quantity.And desulfurization wastewater is after a long time Afterwards, fluorine ion easily releases, and so causes the desulfurization wastewater discharge of Duo Jia steam power plants can not be up to standard, influences normally to produce, End adds in activated alumina absorption, because activated alumina absorption is only applicable to water of the fluorinion concentration less than 10mg/L and removes Fluorine, therefore the performance of activated alumina can be made full use of, ensure that water outlet fluorine ion is up to standard.Last inclined plate sedimentation adds alkali sludge with before Section plus PAC after precipitation tank come out sludge be mixed into extruder processing, can overcome the problems, such as plus alkali sludge dewatering it is difficult.

The utility model is described in further detail with reference to the accompanying drawings and examples.

Embodiment 1：As shown in Figure 2, relay pond 1 and jogging slot 2 connects mix slot 3 into slow simultaneously, mixed slot 3 is connected into heavy slowly Shallow lake slot 4, precipitation tank 4 distinguish connection extruder 5 and medial launder 7, are sequentially connected overcritical electric coagulation apparatus 8 by medial launder 7 and are changed Mixed inclination plate settling facility 9 changes mixed inclination plate settling facility 9 and distinguishes connection extruder 5 and activated alumina equipment 10, active oxidation The access of aluminium equipment 10 releases pond 6.

In foregoing, relaying pond 1 and jogging slot 2 are respectively by connecting simultaneously into slow mixed slot 3.

In foregoing, change mixed inclination plate settling facility 9 and connect extruding by sludge pump with slow mixed pipeline by mixing pipeline soon respectively Machine 5.

In foregoing, intake pump and water outlet pump are connected respectively before and after overcritical electricity coagulation apparatus 8.

In foregoing, as shown in Figure 3, the high-frequency impulse operation principle of overcritical electricity coagulation apparatus 8 includes：By high-frequency impulse Power supply high-frequency repeats " power supply-power-off power supply " process, and ion concentration can reduce rapidly during power supply, and ion concentration can be fast during power-off Speed supplement and recovery, during this pulse electrolysis, conduction time, which is less than, is electrolysed total reaction time, and dissolving metal amount is less than DC electrolysis meltage, thus concentration difference polarization and power consumption are reduced, moreover, every the ripple that one identical time sends, it can be short Mutation in time is then rapidly returned to the physical quantity of its initial value again；At the same time, direct impulse is followed by reverse impulse, keeps The two poles of the earth periodic reverse variation, prevents electrode passivation.

In the utility model, production method includes the following steps：

1) just precipitate：It is below 20mg/L that bleaching water to NH3-N concentration is added in desulfurization wastewater, then adds in weight percent Than PAC and polymer, desulfurization wastewater is made just to precipitate, remove suspended solid and part fluorine ion in desulfurization wastewater, this walks out of water PH is about 6~8.

2) overcritical electric coagulation technology：Just supernatants after precipitation is into overcritical electric coagulation apparatus for desulfurization wastewater, based on electricity Chemical treatment method principle, electrolysis generate the hydroxide of aluminium, are reacted with fluorine ion and generate sediment, so as to remove desulfurization Fluorine ion in waste water, it is about 5~7 that this, which walks out of water pH,.

3) mixed inclined plate sedimentation is changed：A certain amount of NaOH is added in by overcritical electric coagulation technology treated desulfurization wastewater Solution adjusts pH 9~10, then adds in a small amount of macromolecule so that flocculate settles.

4) Defluorination of Formation Mater By Adsorption On Activated Alumina agent is adsorbed：Desulfurization wastewater after changing mixed inclined plate sedimentation, into activated alumina inhale by supernatant It is attached, fluorinion in waste water can be down to below 5ppm, ensure desulfurization wastewater qualified discharge.

In abovementioned steps (2), overcritical electricity coagulation apparatus are that a kind of processing based on electrochemical treatments technical principle is highly concentrated Degree, high chroma, difficult degradation, toxic organic pollution and containing heavy metal, fluorine-containing, the various industrial wastewaters containing cyanogen etc. new set It is standby.The overcritical electric coagulation apparatus have the characteristics that high voltage, high current, height release energy；With on quick exciting electrode plate Plasma diffusing W,Mo, and the characteristics of burst size is big；Positive and negative anodes switching is carried out with quick, so as to reduce electrode passivation, reduces concentration The characteristics of polarization and power consumption.For the overcritical electric coagulation apparatus using aluminum pole as reaction electrode, positive electrode and negative electrode are automatic Change poles can extend electrode service life.The overcritical electric coagulation apparatus electric current is using overload protection mechanism, electric current root during work Depending on water quality information, current limit 100A, current overload, protection mechanism startup；Meanwhile the overcritical electric coagulation includes Three continuous stages：

1) generation of anodes electronically forms the hydroxide of tiny flocculation agent, i.e. iron or aluminium, contributes to the electrolysis of anode；

2) particle, the colloid pollution object loss of stability under the action of flocculant to suspend in water destroys pollutant surface Stability；

3) mutually collided between contaminant particles and tiny flocculation agent, absorption, in and/or cohesion form compared with big flocculating body；

In abovementioned steps (3), add in NaOH solution, adjust pH fluorinion concentration can be down to 9~10 it is very low dense Degree, wherein optimal pH are 9.5~10.

In abovementioned steps (4), Defluorination of Formation Mater By Adsorption On Activated Alumina agent specific surface area 330m²/ g, adsorption capacity are 1 ‰~3 ‰, granularity 1~3mm.

The utility model merges high-frequency impulse skill on the basis of traditional progress Wastewater by Electric flocculating principles using electrolytic cell Art makes equipment during waste water is handled while has the multiple degradings such as electrocoagulation, electric floating and electrochemical redox Effect, substantially increases the removal rate of pollutant, while reduces concentration polarization and prevention electrode passivation problem, significantly extends electrode Service life simultaneously improves electric current conduction efficiency.

Technological means disclosed in the utility model is not limited only to the technological means disclosed in the above embodiment, also Including being combined formed technical solution by more than technical characteristic.It should be pointed out that the ordinary skill for the art For personnel on the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these are improved and profit Decorations are also considered as the scope of protection of the utility model.

Claims (5)

1. Desulphurization for Coal-fired Power Plant waste water integrate fluoride-removing equipment, which is characterized in that relaying pond (1) and walk or drive slowly slot (2) and meanwhile connect into Slowly mixed slot (3) mixes slot (3) and connects into precipitation tank (4), precipitation tank (4) difference connection extruder (5) and medial launder (7), in slowly Between slot (7) be sequentially connected overcritical electric coagulation apparatus (8) and change mixed inclination plate settling facility (9), change mixed inclination plate settling facility (9) and divide Other connection extruder (5) and activated alumina equipment (10), activated alumina equipment (10) access release pond (6).

2. Desulphurization for Coal-fired Power Plant waste water as described in claim 1 integrates fluoride-removing equipment, which is characterized in that relaying pond (1) is gentle Row slot (2) is respectively by connecting simultaneously into slow mixed slot (3).

3. Desulphurization for Coal-fired Power Plant waste water as described in claim 1 integrates fluoride-removing equipment, which is characterized in that changes mixed inclined plate sedimentation and sets Standby (9) pass through sludge pump connection extruder (5) by mixing pipeline soon and mixing pipeline slowly respectively.

4. Desulphurization for Coal-fired Power Plant waste water as described in claim 1 integrates fluoride-removing equipment, which is characterized in that overcritical electricity coagulation is set Standby (8) are front and rear to connect intake pump and water outlet pump respectively.

5. Desulphurization for Coal-fired Power Plant waste water as described in claim 1 integrates fluoride-removing equipment, which is characterized in that overcritical electricity coagulation is set Standby (8) are middle to install high frequency pulse power supply, and high-frequency repeats " power supply-power-off power supply " process, and conduction time, which is less than, is electrolysed always anti- Between seasonable, dissolving metal amount is less than DC electrolysis meltage, every the ripple that one identical time sends, is mutated in a short time, The physical quantity of its initial value is then rapidly returned to again；At the same time, direct impulse is followed by reverse impulse, keeps the two poles of the earth periodic reverse Variation.