CN107381881A - The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission - Google Patents

The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission Download PDF

Info

Publication number
CN107381881A
CN107381881A CN201710833227.8A CN201710833227A CN107381881A CN 107381881 A CN107381881 A CN 107381881A CN 201710833227 A CN201710833227 A CN 201710833227A CN 107381881 A CN107381881 A CN 107381881A
Authority
CN
China
Prior art keywords
desulfurization wastewater
emission
water
wastewater
zero
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710833227.8A
Other languages
Chinese (zh)
Inventor
王占军
王立鹏
刘婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shijiazhuang Green Energy Saving Technology Co Ltd
Original Assignee
Shijiazhuang Green Energy Saving Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shijiazhuang Green Energy Saving Technology Co Ltd filed Critical Shijiazhuang Green Energy Saving Technology Co Ltd
Priority to CN201710833227.8A priority Critical patent/CN107381881A/en
Publication of CN107381881A publication Critical patent/CN107381881A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/12Halogens or halogen-containing compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02Softening water by precipitation of the hardness

Abstract

The present invention relates to a kind of method of wastewater treatment and processing unit of desulfurization wastewater zero-emission, including pretreatment unit, film process unit, pretreatment unit includes flocculation basin and the chemical cycle that is connected with flocculation basin is granulating fluidized bed, is gone firmly for removing in waste water suspension and softening;Film process unit includes scale inhibiting cleaner and the nano filter membrance device being connected with scale inhibiting cleaner, for first being activated to desulfurization wastewater, to realize antiscale, scale removal purpose, then by ClBy desulfurization wastewater reuse after being separated from desulfurization wastewater, and ClThen it is used as chemicals production raw material.The method of wastewater treatment and processing unit of the desulfurization wastewater zero-emission of the present invention, can not only reuse be carried out to the desulfurization wastewater after processing, while by Ca2+、Mg2+、ClRecycled Deng separation has been carried out from desulfurization wastewater, not only realize the zero-emission of desulfurization wastewater, reduce the pollution to environment, also a saving resource, effective utilization has been carried out to resource, and whole processing procedure is green, non-secondary pollution.

Description

The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission
Technical field
The present invention relates to environmental technology field, more particularly to a kind of method of wastewater treatment of desulfurization wastewater zero-emission and processing Device.
Background technology
China is the poor and in short supply country of a water resource, development and process of industrialization with China's economic construction Accelerate, industrial water demand is increased substantially, and the discharge capacity of industrial wastewater is consequently increased, and the imbalance between supply and demand of water resource will more Add protrusion.Therefore, for the problem such as water resource critical shortage and water utilization rate be low, what country newly promulgated《Water pollution is prevented Control action plan》In industrial wastewater pollution preventing and treating, improve water-use efficiency, pollutant emission factor, environmental risk control etc. Aspect proposes more strict requirements, and this, which allows for the key industrys such as coal, electric power, steel, chemical industry, needs to widely popularize work Industry cycling utilization of wastewater technology, to reach the purpose of " zero-emission ".
Wastewater zero discharge is the concept proposed by American-European economically developed country the 1970s, is one for work Industry waste water carries out the comprehensive application technology of complex process." zero-emission " refer to ad infinitum reduce pollutant and can source emission until The activity for being zero, i.e., caused industrial wastewater can be returned all after proper technology is handled in process of production for all kinds of enterprises With any waste water will not be discharged into outside water body environment.
In sulfur removal technology, a certain amount of waste water is inevitably produced.The water quality of desulfurization wastewater is complex, mainly Composition is dust and desulfurization product (CaSO4And CaSO3), for pH value typically in the range of 4~6.5, concentration of suspension is high, contains A large amount of Ca2+、Mg2+Cation and SO4 2—、Cl、FDeng anion, TDS is typically between 25000-60000mg/L, wherein Cl Content contains a small amount of Hg typically between 5000-20000mg/L2+、Cr6+、Cd2+、Pb2+Etc. heavy metal ion, to ring The harm in border is extremely serious.
Desulfurization wastewater technique of zero discharge relates generally to two stages of Chemical Pretreatment and advanced treating at present.Chemical Pretreatment For removing F in desulfurization wastewater、Ca2+、Mg2+With part heavy metal ion, advanced treating is used to remove the salt in desulfurization wastewater Divide and separate out salt crystallization and recycle.The Chemical Pretreatment stage mainly adds special flocculant, scale inhibition into desulfurization wastewater Agent, softening agent and other adjuvants, make the calcium in water, magnesium ion, heavy metal ion and corrosive salt and medicament formed it is heavy Shallow lake is peeled off from water, or formation complex compound increases its solubility in water, so as to realize the purpose of removal.But at the waste water The medicament delivery amount of reason method is very big, and cost is high, and can produce substantial amounts of sludge, brings secondary pollution problems;Can also simultaneously New material is introduced, new foreign ion can be produced in water, this will be that follow-up processing brings the problem of new.
The advanced treating stage mainly applies membrane filtration technique and evaporative crystallization technique, and evaporative crystallization technique typically uses more Imitate evaporator.Although multi-effect evaporator Technical comparing is ripe, application is wider, but part energy consumption is reduced, but in desulfurization wastewater Containing substantial amounts of salt, the corrosivity of salt solution is extremely strong under high temperature, therefore higher to multi-effect evaporator equipment and material choice requirement, This results in increasing for cost of equipment, so that Installed capital cost is high;And need to expend substantial amounts of electric energy in the process of running And water vapour so that operating cost is higher;In addition, the crystal salt that evaporative crystallization finally gives is salt-mixture, it is difficult to is separated, inconvenience In reusing, therefore salt-mixture will be used as hazardous waste to exist, if must not be serious when that will bring to mixing salt treatment Pollution.
In summary, Chemical Pretreatment and advanced treating stage exist during desulfurization wastewater zero discharge treatment Deficiency, therefore for the water quality characteristicses of desulfurization wastewater, exploring the method and system for developing new desulfurization wastewater zero-emission has weight The Engineering Guidance meaning wanted.
The content of the invention
In order to solve the above problems, the invention provides a kind of method of wastewater treatment of desulfurization wastewater zero-emission and processing dress To put, the method for wastewater treatment and processing unit of the desulfurization wastewater zero-emission not only can carry out reuse to the desulfurization wastewater after processing, Simultaneously by Ca2+、Mg2+、ClRecycled Deng separation has been carried out from desulfurization wastewater, realize the zero-emission of desulfurization wastewater, reduced Pollution to environment, also a saving resource, carry out to resource effective utilization, and whole processing procedure is green, without two Secondary pollution.
The technical solution adopted by the present invention is:A kind of method of wastewater treatment of desulfurization wastewater zero-emission, comprises the following steps:
A, pre-process:Flocculation aid or flocculant are added into desulfurization wastewater, flocculation, sedimentation, collect supernatant after being well mixed Liquid;
B, softening is gone hard:Chemical agent and crystal seed are added into supernatant, makes the Ca in supernatant2+、Mg2+Ion is formed CaCO3With Mg (OH)2Crystal separates out, and reduces the hardness in supernatant;
C, film pre-treatment:Waste water after being gone firmly to softening using activation ceramics carries out activation process, realizes and waste water is removed Dirty, molten dirt, scale inhibition, the effect of sterilization;And activated delay ceramics make activated water maintain the state of activation;
D, film process:Waste water after step c processing is obtained into secondary water and strong brine through film process, strong brine is as benefit Water-filling reuse, secondary water are used as chemicals production raw material.
As the further restriction to above-mentioned technical proposal, chemical agent described in step b is sodium hydroxide.
As the further restriction to above-mentioned technical proposal, contain lithium, rubidium, caesium, beryllium element in activation ceramics described in step c In one or more;It is described activation delay ceramics in containing sodium, magnesium, phosphorus, iron, iodine, Zn-ef ficiency one or more.
As the further restriction to above-mentioned technical proposal, film process described in step d is to be carried out using NF membrane at filtering Reason.
A kind of wastewater treatment equipment of desulfurization wastewater zero-emission, at the waste water for desulfurization wastewater zero-emission described above Reason method, including pretreatment unit, the film process unit that is connected with pretreatment unit;
The pretreatment unit includes flocculation basin and the chemicrystallization being connected with flocculation basin circulation is granulating fluidized bed;It is described The bottom of flocculation basin is provided with water inlet and sewage draining exit, and top is provided with purified liquor outlet, and water inlet passes through the pipeline with the first water pump Be connected with the desulfurization wastewater output end in desulphurization system, purified liquor outlet with chemical cycle is granulating fluidized bed is connected;The chemistry follows The granulating fluidized bed bottom of ring is sequentially provided with dosing mouth, crystal seed dispensing port and particulate emission mouth, and top exports provided with overflow;
The film process unit includes scale inhibiting cleaner and the reverse osmosis membrane apparatus being connected with scale inhibiting cleaner;The resistance Left chamber and right chamber room are divided into by plate inside dirty descaler, the plate has space, the left side with scale inhibiting cleaner bottom The inwall of chamber is provided with nanometer antiscale cermet coating, and the inwall of the right chamber room is provided with activation delay nano-ceramic layer, And water inlet is set at the top of the left chamber, in the right chamber roof, delivery port is set;The scale inhibiting cleaner water inlet The overflow outlet granulating fluidized bed with chemical cycle is connected, and delivery port is connected with nano filter membrance device;The nano filter membrance device it is defeated Going out end includes divalent salts concentrate output end and monovalent salt penetrating fluid output end, divalent salts concentrate output end and reuse tank phase Even, monovalent salt penetrating fluid output end connection infiltration flow container.
As the further restriction to above-mentioned technical proposal, the chemical cycle it is granulating fluidized bed in be provided with cylinder, institute Stating has interlayer between cylinder and the granulating fluidized bed inwall of chemical cycle, and the both ends open of interlayer.
As the further restriction to above-mentioned technical proposal, the flocculation basin water inlet sets pressure gauge and fluid flow Meter.
Using above-mentioned technology, the advantage of the invention is that:
The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission of the present invention, flocculation sediment is handled, changed Learning crystallization granulation softening goes hard processing, activation process, membrane technology to be combined, and being granulated by chemicrystallization can effectively go in water removal Hardness (Ca2+、Mg2+), while after being activated using activation ceramics to water, through NF membrane by ClAfter being separated from desulfurization wastewater Desulfurization wastewater can be made to carry out reuse, effectively prevent the Cl in desulfurization wastewaterCorrosion to equipment, while the Cl isolated It can be achieved to recycle.During desulfurization wastewater is handled, it is not necessary to outwards discharge any liquid, part water can industry time With, another part realizes recycling, and solid waste can also be used for brickmaking industry, truly realize desulfurization The zero-emission of waste water, and whole processing procedure is green, pollution-free.
The granulating fluidized bed setting of chemical cycle of the present invention, the Ca that can be gone by chemicrystallization comminution granulation in water removal2+、 Mg2+, make Ca2+、Mg2+Generate CaCO3With Mg (OH)2Crystal, and be attached to seed surface and form bulky grain crystal seed, surface attachment has CaCO3With Mg (OH)2The bulky grain crystal seed of crystal can use as the raw material of desulphurization system, it is turned waste into wealth, while also make Resource has obtained great utilization.
The setting of scale inhibiting cleaner of the present invention, the nanometer antiscale cermet coating in scale inhibiting cleaner left chamber can be right Water carries out activation process, the hydrogen bond angle of hydrone is substantially broadened, and is combined so as to form stronger molecule, reduces the surface of water Tension force, change the pH value of water, water is reached the pH pH-values balance between 7-8;Simultaneously by the change of hydrogen bond, deposit in water Calcium ion break original growth sequence, and be not likely to produce adhesion condition, so as to avoid scale formation, also play molten dirt Effect;In addition, the activation delay nano-ceramic layer in scale inhibiting cleaner right chamber room can also make activated water continue to the state of activation, Duration is activated up to 48 hours, so as to be not in fouling in the subsequent treatment of water, in order to avoid influence the normal operation of follow-up equipment.
The setting of NF membrane of the present invention, the dissolubility inorganic salts in desulfurization wastewater can be effectively handled, in inorganic salts Monovalent ion separated with divalent ion, so as to realize SO in desulfurization wastewater4 2—、ClSeparation, with SO4 2—Solution As technique Water circulation, and carry ClPenetrating fluid can then to concentrate be saturated brine to as bactericide or other products; Simultaneously by ClSeparated from desulfurization wastewater, also effectively prevent ClThe corrosion of equipment is caused into equipment, influences equipment Service life.
Brief description of the drawings
Fig. 1 is the connection diagram of the wastewater treatment equipment of desulfurization wastewater zero-emission of the embodiment of the present invention.
In figure:1- flocculation basins;2- chemical cycles are granulating fluidized bed;The water pumps of 3- first;4- scale inhibiting cleaners;5- NF membranes fill Put;6- reuse tanks;7- permeates flow container.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
The present embodiment is related to a kind of method of wastewater treatment of desulfurization wastewater zero-emission, and the method for wastewater treatment gives up for desulfurization The wastewater treatment equipment of water zero discharge, it is also available while waste water recycling is realized to be post-processed to desulfurization wastewater Chemicals production raw material.As shown in Figure 1, the wastewater treatment equipment of the desulfurization wastewater zero-emission includes pretreatment unit, located with pre- The connected film process unit of reason unit and what is be connected with film process unit divide salt unit.Pretreatment unit include flocculation basin 1 and The chemicrystallization circulation granulating fluidized bed 2 being connected with flocculation basin 1;The bottom of the flocculation basin 1 is provided with water inlet and sewage draining exit, top Portion is provided with purified liquor outlet, and water inlet is connected by the pipeline with the first water pump 3 with the desulfurization wastewater output end in desulphurization system, Pressure gauge and fluid flowmeter, purified liquor outlet is set to be connected with chemical cycle granulating fluidized bed 2 in water inlet simultaneously.
The bottom of chemical cycle granulating fluidized bed 2 is sequentially provided with dosing mouth, crystal seed dispensing port and particulate emission mouth, top and set There is overflow outlet, dosing mouth is used to add into chemical cycle granulating fluidized bed 2 to be easy to and the Ca in waste water2+、Mg2+Deng generation The chemical agent of precipitation, crystal seed dispensing port is used to add crystal seed into chemical cycle granulating fluidized bed 2, so that Ca2+、Mg2+Deng with The sediment of chemical agent reaction generation is attached to seed surface and forms seed particles.In in chemical cycle granulating fluidized bed 2 Portion is provided with cylinder, has interlayer, and the both ends open of interlayer between cylinder and granulating fluidized bed 2 inwall of chemical cycle, it is therefore an objective to The crystal seed in granulating fluidized bed 2 cylinder of chemical cycle is being moved to from bottom to top with current behind top, fallen after rise in interlayer Crystallization process is continued to participate in granulating fluidized bed 2 bottom of chemical cycle, is so moved in circles, until generating seed particles from particle Floss hole is discharged.
Film process unit includes scale inhibiting cleaner 4 and the nano filter membrance device 5 being connected with scale inhibiting cleaner 4, for pre- place Waste water after reason carries out filtration treatment, to realize the desalination of desulfurization wastewater and concentration.It is divided into inside scale inhibiting cleaner 4 by plate Left chamber and right chamber room, plate have space with the bottom of scale inhibiting cleaner 4, water inlet are set at the top of left chamber, in right chamber roof Delivery port is set;The water inlet of scale inhibiting cleaner 4 is connected with the overflow outlet of chemical cycle granulating fluidized bed 2, so that through chemistry The left chamber that the desulfurization wastewater after granulating fluidized bed 2 softening is gone firmly enters scale inhibiting cleaner 4 is circulated, passes through plate and scale inhibition afterwards Space between the bottom of descaler 4 enters right chamber room.Made pottery in the inwall of the left chamber of scale inhibiting cleaner 4 provided with nanometer antiscale metal Enamel coating, the inwall of right chamber room are provided with activation delay nano-ceramic layer, for carrying out activation process to desulfurization wastewater, can play resistance Dirt, scale removal, the effect of sterilization, therefore can have certain protective effect to follow-up film device, it can effectively extend the use of film Life-span.The delivery port of scale inhibiting cleaner 4 is connected with nano filter membrance device 5, nano filter membrance device 5 can effectively to the monovalence in inorganic salts from Son is separated with divalent ion, so as to realize SO4 in desulfurization wastewater2—、ClSeparation so that ClDivide from desulfurization wastewater By desulfurization wastewater reuse from after, the Cl in desulfurization wastewater is effectively avoidedCorrosion to equipment.The output end bag of nano filter membrance device 5 Divalent salts concentrate output end and monovalent salt penetrating fluid output end are included, divalent salts concentrate output end is connected with reuse tank 6, reuse SO4 in pond 62—Concentrate is as technique Water circulation;And monovalent salt penetrating fluid output end is connected with infiltration flow container 7, flow container is permeated Cl in 7Penetrating fluid is to as chemicals production raw material.
The wastewater treatment equipment of desulfurization wastewater zero-emission described above, at the waste water available for following desulfurization wastewater zero-emission Reason method, specific method comprise the following steps:
A, pre-process:Flocculation aid is added into desulfurization wastewater or flocculant, the preferred polyacrylamide of flocculant, flocculation aid are excellent Lime is selected, flocculation, sedimentation, collect supernatant after being well mixed.Wherein, the pH of desulfurization wastewater can be adjusted by adding flocculation aid lime , can be by the suspension in desulfurization wastewater, part Ca to 6 or so2+、Mg2+, partial organic substances, the pollution factor such as COD, BOD remove Fall.Meanwhile the sludge for settling to obtain can discharge, recycled after carrying out subsequent treatment.
B, softening is gone hard:30% NaOH solution and crystal seed is added into supernatant, makes NaOH solution quick with supernatant Mixing, while crystal seed is in fluidized state under flow action.In flow process, the NaOH and HCO in water3—And Ca2+、Mg2+ Following reaction occurs:
NaOH→OH+Na+
OH+Mg2+→Mg(OH)2
OH+HCO3 →CO3 2—+H2O, CO3 2—+Ca2+→CaCO3
Therefore, the Ca in supernatant2+、Mg2+Ion forms CaCO with NaOH3With Mg (OH)2Crystal simultaneously separates out, the Mg of precipitation (OH)2And CaCO3Crystal is constantly attached to tiny seed surface, and tiny crystal seed passes through Mg (OH)2And CaCO3Crystallization Constantly grow up, the crystal seed of bulky grain is under, and short grained crystal seed is upper.As the Mg (OH) crystallized in seed particles2And CaCO3Matter When amount reaches more than the 98% of particle gross mass, then seed particles are discharged, at the same time, crystal seed fed.So follow Ring is reciprocal, the Ca in water2+、Mg2+The overwhelming majority is with CaCO3With Mg (OH)2Form crystallize out and be attached to seed surface, from And it is reduced the hardness in supernatant.More than 90% Ca is can remove by this method2+, the clearance of total hardness reaches 70- 80%, and without any discharge of wastewater, by CaCO3With Mg (OH)2The bulky grain crystal seed that crystal is attached to seed surface formation can conduct The raw material of desulphurization system use, and it is turned waste into wealth, while resource has been obtained great utilization.
C, film pre-treatment:Waste water after being gone firmly to softening using activation ceramics carries out activation process, contains in activation ceramics One or more in lithium, rubidium, caesium, beryllium element, the activation ceramics can make the hydrogen bond angle of water broaden, so as to form stronger point Son combines, and so can effectively adjust the acidity and basicity of water, water is reached the pH pH-values balance between 7-8;While by The change of hydrogen bond, calcium ion present in water has broken original growth sequence and has been not likely to produce adhesion condition, so as to avoid sending out Raw scale formation, also play molten dirt, scale removal, the effect of sterilization.Then, activated delay ceramics make activated water maintain activation shape State, activation delay ceramics in containing sodium, magnesium, phosphorus, iron, iodine, Zn-ef ficiency one or more, the activation delay ceramics can make activation Water continues to the state of activation, and activation duration is up to 48h.
D, film process:Waste water after step c processing is handled through NF membrane to obtain secondary water and strong brine, wherein Strong brine is SO4 2—Concentrate, secondary water ClPenetrating fluid.SO4 2—Concentrate, which is used as, supplements Water circulation, and ClPenetrating fluid is then Can be concentrated into being used as bactericide after saturated brine or used as other products.Meanwhile by the Cl in desulfurization wastewaterIsolate Come, also effectively prevent desulfurization wastewater Cl in reuseThe corrosion of equipment is caused into equipment, influences the service life of equipment.
The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission of the present invention, desulfurization wastewater is through flocculation basin 1 After flocculation, precipitation, suspension, part Ca can remove2+、Mg2+, partial organic substances, the pollution factor such as COD, BOD, subsequently entering Learn circulation granulating fluidized bed 2 and can remove most of Ca in desulfurization wastewater2+、Mg2+, to reduce the hardness of desulfurization wastewater, and obtain Surface carries CaCO3With Mg (OH)2The bulky grain crystal seed of crystal is recycling;Desulfurization wastewater is after the activation of scale inhibiting cleaner 4 afterwards Into nano filter membrance device 5, obtained strong brine can reuse again, remaining secondary water can then be used as chemicals production raw material, thus in The zero-emission of desulfurization wastewater is truly realized, reduces the pollution to environment, has saved resource, had to resource Effect utilizes, and whole processing procedure is green, non-secondary pollution.
Better embodiment of the present invention is the foregoing is only, but protection scope of the present invention is not limited thereto, it is any ripe Know those skilled in the art the invention discloses technical scope in, the technique according to the invention design be subject to equivalent substitution or Change the technical scheme of gained, should all be covered by protection scope of the present invention.

Claims (7)

1. a kind of method of wastewater treatment of desulfurization wastewater zero-emission, it is characterised in that comprise the following steps:
A, pre-process:Flocculation aid or flocculant are added into desulfurization wastewater, flocculation, sedimentation, collect supernatant after being well mixed;
B, softening is gone hard:Chemical agent and crystal seed are added into supernatant, makes the Ca in supernatant2+、Mg2+Ion forms CaCO3 With Mg (OH)2Crystal separates out, and reduces the hardness in supernatant;
C, film pre-treatment:Softening is gone using activation ceramics it is hard after waste water carry out activation process, realize scale removal to waste water, molten Dirt, scale inhibition, the effect of sterilization;And activated delay ceramics make activated water maintain the state of activation;
D, film process:Desulfurization wastewater after step c processing is obtained into secondary water and strong brine through film process, strong brine is as benefit Water-filling reuse, secondary water are used as chemicals production raw material.
2. the method for wastewater treatment of desulfurization wastewater zero-emission according to claim 1, it is characterised in that:Described in step b Chemical agent is sodium hydroxide.
3. the method for wastewater treatment of desulfurization wastewater zero-emission according to claim 1, it is characterised in that:It is living described in step c Change in ceramics and contain the one or more in lithium, rubidium, caesium, beryllium element;It is described activation delay ceramics in containing sodium, magnesium, phosphorus, iron, The one or more of iodine, Zn-ef ficiency.
4. the method for wastewater treatment of desulfurization wastewater zero-emission according to claim 1, it is characterised in that:Film described in step d Handle to carry out filtration treatment using NF membrane.
5. a kind of wastewater treatment equipment of desulfurization wastewater zero-emission, in method of wastewater treatment as claimed in claim 1, its It is characterised by:The film process unit being connected including pretreatment unit, with pretreatment unit;
The pretreatment unit includes flocculation basin and the chemicrystallization being connected with flocculation basin circulation is granulating fluidized bed;The flocculation The bottom in pond is provided with water inlet and sewage draining exit, and top is provided with purified liquor outlet, and water inlet is by the pipeline with the first water pump with taking off Desulfurization wastewater output end in sulphur system is connected, purified liquor outlet with chemical cycle is granulating fluidized bed is connected;The chemical cycle is made The bottom of grain fluid bed is sequentially provided with dosing mouth, crystal seed dispensing port and particulate emission mouth, and top exports provided with overflow;
The film process unit includes scale inhibiting cleaner and the reverse osmosis membrane apparatus being connected with scale inhibiting cleaner;The scale inhibition removes Left chamber and right chamber room are divided into by plate inside dirty device, the plate has space, the left chamber with scale inhibiting cleaner bottom Inwall be provided with nanometer antiscale cermet coating, the inwall of the right chamber room is provided with activation delay nano-ceramic layer, and in Water inlet is set at the top of the left chamber, delivery port is set in the right chamber roof;The scale inhibiting cleaner water inlet is with changing Learn to circulate granulating fluidized bed overflow and export and be connected, delivery port is connected with nano filter membrance device;The output end of the nano filter membrance device Including divalent salts concentrate output end and monovalent salt penetrating fluid output end, divalent salts concentrate output end is connected with reuse tank, and one Valency salt penetration liquid output end connection infiltration flow container.
6. the wastewater treatment equipment of desulfurization wastewater zero-emission according to claim 5, it is characterised in that:The chemical cycle Cylinder is provided with granulating fluidized bed, there is interlayer, and the two of interlayer between the cylinder and the granulating fluidized bed inwall of chemical cycle End opens.
7. the wastewater treatment equipment of desulfurization wastewater zero-emission according to claim 5, it is characterised in that:The flocculation basin enters Pressure gauge and fluid flowmeter are set at the mouth of a river.
CN201710833227.8A 2017-09-15 2017-09-15 The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission Pending CN107381881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710833227.8A CN107381881A (en) 2017-09-15 2017-09-15 The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710833227.8A CN107381881A (en) 2017-09-15 2017-09-15 The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission

Publications (1)

Publication Number Publication Date
CN107381881A true CN107381881A (en) 2017-11-24

Family

ID=60350105

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710833227.8A Pending CN107381881A (en) 2017-09-15 2017-09-15 The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission

Country Status (1)

Country Link
CN (1) CN107381881A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110921897A (en) * 2019-11-29 2020-03-27 柳州钢铁股份有限公司 Purification method of OMC desulfurization waste liquid
CN111875094A (en) * 2020-07-16 2020-11-03 成都泓润科技有限公司 Comprehensive treatment process for beryllium-containing wastewater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110921897A (en) * 2019-11-29 2020-03-27 柳州钢铁股份有限公司 Purification method of OMC desulfurization waste liquid
CN111875094A (en) * 2020-07-16 2020-11-03 成都泓润科技有限公司 Comprehensive treatment process for beryllium-containing wastewater
CN111875094B (en) * 2020-07-16 2022-05-10 成都泓润科技有限公司 Comprehensive treatment process for beryllium-containing wastewater

Similar Documents

Publication Publication Date Title
CN102826686B (en) Double-membrane treatment method of iron and steel industrial wastewater
CN105384316B (en) A kind of processing method of the fluorine-containing nitrogen-containing wastewater of electronics industry
CN103304104B (en) Zero-sewage discharge novel process for development of natural gas fields
CN108996791B (en) Novel process for seawater desalination and comprehensive utilization
CN105084587A (en) Treatment method and equipment of high-salt waste water
CN106746120A (en) A kind of technique of zero discharge of the biochemical tailrace advanced treatment of Coal Chemical Industry
CN103011441B (en) Method for deep treatment on cyanogens, fluorine and ammonia nitrogen-containing waste water
CN104118956A (en) Method for treating sewage
CN105439341A (en) Salt-containing wastewater treatment system and treatment method
CN205528213U (en) High salt industrial waste water that contains divides salt zero discharge system
CN207130086U (en) A kind of salt-containing waste water treating device
CN101863570B (en) Heavy metal-containing wastewater treatment and reuse method and device
CN107585968B (en) A kind of chlor-alkali brine waste processing system and method
CN107381881A (en) The method of wastewater treatment and processing unit of desulfurization wastewater zero-emission
CN100513324C (en) Pre-treatment method for sea salt water
CN205442869U (en) It produces brackish water desalination system of water recovery rate to improve bitter
CN107601729B (en) Strong salt wastewater zero-discharge treatment process and system for steel industry
CN106966536A (en) Strong brine zero-emission film concentration technology and equipment
CN214693615U (en) System for reducing scaling in softening treatment of reverse osmosis concentrated brine caustic soda/lime soda ash
CN205603386U (en) Strong brine zero release membrane concentrator
CN205442916U (en) Contain salt effluent disposal system
CN109422383A (en) A kind of Treated sewage reusing treatment process
RU2281257C2 (en) Method of production of highly demineralized water
CN111777220A (en) Novel softening treatment method for high-salinity and high-permanent-hardness wastewater
CN209428272U (en) A kind of steel and iron industry strong brine processing unit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination