Remove the device of whole hardness in reverse osmosis concentrated waterTechnical field
The invention belongs to technical field of sewage, and in particular to a kind of dress for removing whole hardness in reverse osmosis concentrated waterIt sets.
Background technique
Reverse osmosis membrane because its treatment effeciency height, effluent quality is good, simple operation and other advantages and be widely used in regeneration effluentIn zero-emission engineering.However reverse osmosis producing water ratio can only achieve 75% or so, the processing of reverse osmosis concentrated water be technically andProblem economically.If concentrated water is directly discharged in environment, highly concentrated salt water will cause ecological environment seriousIt influences, and causes the waste of water resource.The processing method of reverse osmosis concentrated water mainly includes surface water discharge, deep-well note at presentIt penetrates, spray, thermal evaporation etc..But above method fails to well utilize reverse osmosis concentrated water, does not reduce concentrate fundamentallyDischarge, also create the waste of water resource.
Particularly, for sulfate concentration in water, the processing of calcium ion concentration and the very high strong brine of Na ion concentration,Presently, there are the problem of there are three aspect: first is that highly concentrated strong brine is because contain antisludging agent, so that the difficulty of Crystallization SeparationDegree increases；Second is that the strong brine high for sulphates content, general processing method is to be converted to permanent hardness (calcium sulfate)For temporary hardness (calcium carbonate), but the higher cost for the sodium carbonate being newly introduced；Third is that being adsorbed because Na ion concentration is highThe limitation of equation, residual hardness cannot be replaced with Na-ion exchanger.
Summary of the invention
The purpose of the present invention is at least solving one of above-mentioned problems of the prior art, which is by following skillWhat art scheme was realized:
The invention proposes a kind of device of whole hardness in removal reverse osmosis concentrated water, including permanent hardness eliminate unit,Temporary hardness eliminates unit and residual hardness eliminates unit；The permanent hardness eliminate unit include crystallizer, thickener and fromThe import of heart dewaterer, the crystallizer is connect with strong brine intake line, and the import of the crystallizer is also and for being added waddingSolidifying agent is connected with the dosing tank of crystal seed, and the magma outlet of the crystallizer is connect with the import of the thickener, the thickenerDischarge port connect with the import of the centrifugal dehydrator；It includes that sequentially connected quick lime is anti-that the temporary hardness, which eliminates unit,Ying Chi, coagulative precipitation tank, flocculation sedimentation tank and sedimentation basin, the water out, described of the water out of the crystallizer, the thickenerThe water out of centrifugal dehydrator is connect with the import of the quick lime reaction tank；It includes chelating that the residual hardness, which eliminates unit,Resin filter, the water out of the sedimentation basin are connect with the import of the chelating resin filter, the chelating resin filteringThe outlet of device connects discharge pipe line.
It further includes the second thickener and the second centrifugal dehydrator that the temporary hardness, which eliminates unit, second thickenerImport is connect with the outlet of the sedimentation basin, and the discharge port of second thickener is connect with the import of the second centrifugal dehydrator,Import of the water out with the chelating resin filter of the water out of second thickener, second centrifugal dehydratorConnection.
The chelating resin filter is also connect with regenerated acid dosing tank.
The chelating resin filter is exported equipped with backwash waste, and the backwash waste outlet is reacted with the quick limeThe import in pond connects.
The sedimentation basin is inclined-plate clarifying basin, and quick lime dosing tank is equipped on the quick lime reaction tank, described mixedSolidifying sedimentation basin is equipped with coagulant dosing tank, and flocculant dosing tank is equipped on the flocculation sedimentation tank.
The crystallizer includes crystallizing tank, guide shell, blender and capping, and the crystallizing tank is arranged in the guide shellInside, the blender are arranged in the guide shell, and the blender is propeller agitator, and the import of the crystallizer is setIt sets in the middle and lower part of the crystallizing tank, is exported in the bottom of the crystallizing tank equipped with the magma, the top of the crystallizing tank is setThere is settling section, forms ring cavity, the water out setting of the crystallizer between the top of the crystallizing tank and the outer wall of the cappingIn the bottom of the ring cavity.
The top of the crystallizing tank is equipped with outward in the expansion segment of 30 ° of angles expansion, is equipped at the top of the expansion segment perpendicularThe region that the overflow baffle directly arranged, the expansion segment and overflow baffle are formed is the settling section, the overflow baffle and instituteIt states and forms the ring cavity between the outer wall of capping.
The device of whole hardness in a kind of removal reverse osmosis concentrated water, including permanent hardness eliminates unit, temporary hardness is eliminatedUnit and residual hardness eliminate unit；It includes crystallizer, thickener and centrifugal dehydrator that the permanent hardness, which eliminates unit, describedThe import of crystallizer is connect with strong brine intake line, the import of the crystallizer also with for be added flocculant and crystal seed plusMedicine-chest connection, the crystallizer magma outlet is connect with the import of the thickener, the discharge port of the thickener with it is describedThe import of centrifugal dehydrator connects；It includes sequentially connected quick lime reaction tank, coagulating sedimentation that the temporary hardness, which eliminates unit,Pond, flocculation sedimentation tank and sedimentation basin, the water out of the crystallizer, the water out of the thickener, the centrifugal dehydratorWater out is connect with the import of the quick lime reaction tank；It includes more medium filter and chela that the residual hardness, which eliminates unit,Resin filter, the water out of the sedimentation basin are connect with the import of the more medium filter, the more medium filterOutlet connect with the import of the chelating resin filter, the outlet of the chelating resin filter connects discharge pipe line.
It further includes the second thickener and the second centrifugal dehydrator that the temporary hardness, which eliminates unit, second thickenerImport is connect with the outlet of the sedimentation basin, and the discharge port of second thickener is connect with the import of the second centrifugal dehydrator,The water out of second thickener, second centrifugal dehydrator water out with the import of the more medium filter connectIt connects.
The chelating resin filter is also connect with regenerated acid dosing tank, the chelating resin filter and multi-medium filteringBackwash waste outlet is equipped on device, the backwash waste of the chelating resin filter exports anti-with the more medium filterWastewater outlet is washed to connect with the import of the quick lime reaction tank.
The present invention has the advantages that
Processing unit proposed by the invention can either eliminate the permanent hardness in strong brine, can also eliminate temporarily hardDegree, additionally it is possible to eliminate residual hardness, the concentration of the calcium and magnesium cation in salt water goes to zero after treatment, is conducive to salt waterConcentration and zero discharge treatment in next step.In addition, treatment process of the present invention need not quote other displacer reagents, save medicament atThis, but also good calcium sulphate crystal has been recycled, farthest save resource.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this fieldTechnical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present inventionLimitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention two.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawingThe illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated hereThe mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairsThe range opened is fully disclosed to those skilled in the art.
It should be understood that term used herein merely for description particular example embodiment purpose, and have no intention intoRow limitation.Unless the context clearly indicates otherwise, otherwise singular " one " as used in the text, "one" and " described "Can also indicate to include plural form.The terms "include", "comprise", " containing " and " having " are inclusives, and thereforeIt indicates the presence of stated feature, step, operations, elements, and/or components, but presence or addition one or more is not precludedA other feature, step, operation, component, assembly unit, and/or their combination.
Although can be described in the text using term first, second, third, etc. multiple element, component, region, layer and/Or section, still, these component, assembly units, region, layer and/or section should not be limited by these terms.These terms can be onlyFor a component, assembly unit, region, layer or section are distinguished with another region, layer or section.Unless context clearly refers toOut, do not implied that when otherwise the term and other numerical terms of such as " first ", " second " etc use in the text sequence orPerson's order.Therefore, first element discussed below, component, region, layer or section are in the introduction for not departing from example embodimentIn the case of can be referred to as second element, component, region, layer or section.
For ease of description, an element as illustrated in the diagram can be described use space relativeness term in the textEither feature is relative to another element or the relationship of feature, these relativeness terms are, for example, " inside ", " outside ", " interiorSide ", " outside ", " following ", " lower section ", " above ", " top " etc..This spatial correlation term is intended to include removing to retouch in figureThe different direction of device in use or operation except the orientation drawn.For example, being retouched if the device in figure is overturnState for " below other elements or feature " either the element " below other elements or feature " will then be orientated "Above other elements or feature " either " above other elements or feature ".Therefore, exemplary term " in ... lower section " canTo include in orientation upper and under.In addition device can be oriented and (be rotated by 90 ° or in other directions) and used hereinSpatial correlation descriptor correspondingly explains.
Embodiment one:
As shown in Figure 1, the invention proposes a kind of device of whole hardness in removal reverse osmosis concentrated water, including permanent hardnessEliminate unit 1, temporary hardness eliminates unit 2 and residual hardness eliminates unit 3.It includes crystallizer that permanent hardness, which eliminates unit 1,101, the import of thickener 102 and centrifugal dehydrator 103, crystallizer 101 is connect with strong brine intake line, crystallizer 101Import is also connect with the dosing tank 104 for flocculant and crystal seed to be added, magma outlet and the thickener 102 of crystallizer 101Import connection, the discharge port of thickener 102 are connect with the import of centrifugal dehydrator 103.It includes sequentially that temporary hardness, which eliminates unit 2,Quick lime reaction tank 201, coagulative precipitation tank 202, flocculation sedimentation tank 203 and the sedimentation basin 204 of connection, the water of crystallizer 101 go outMouth, the water out of thickener 102, centrifugal dehydrator 103 water out connect with the import of quick lime reaction tank 201.It is remainingIt includes chelating resin filter 301 that hardness, which eliminates unit 3, is filled with alpha-amino phosphonate chelating resin in chelating resin filter 301.The water out of sedimentation basin 204 is connect with the import of chelating resin filter 301, and the outlet of chelating resin filter 301 connects rowWater lines 302.
Process using whole hardness of apparatus of the present invention removal reverse osmosis water is as follows:
1) reverse osmosis concentrated water is introduced into crystallizer 101 by strong brine intake line, meanwhile, it is connected by dosing tank 104Into crystallizer 101, investment can eliminate the flocculant of the peptizaiton of antisludging agent and the calcium sulfate of crystal growth can be promoted brilliantKind.Concentrated water crystallizes in crystallizer 101, after the magma that crystallization process obtains enters the progress concentration of thickener 102, then conveysIt is carried out dehydrating to centrifugal dehydrator 103, the calcium sulfate of low-water-content is obtained after dehydration；The water that crystallization process is isolated is to disappearExcept the salt water of permanent hardness, the water that the salt water and thickener 102 and centrifugal dehydrator 103 are isolated is delivered to temporarily hardDegree eliminates unit 2.
2) be delivered to temporary hardness eliminate unit 2 salt water in quick lime reaction tank 201 with Ca (OH)2React lifeAt calcium carbonate, under conditions of pH value is 11, magnesium ion is also precipitated out in the form of magnesium carbonate.Later, salt water again successively inCoagulant is added in coagulative precipitation tank 202, and flocculant is added in flocculation sedimentation tank 203, is finally precipitated in sedimentation basin, fromAnd realize and be separated by solid-liquid separation, liquid obtained after separation is the salt water for eliminating temporary hardness.
3) water for eliminating permanent hardness and temporary hardness is delivered to chelating resin filter 301, can remove in waterContained a small amount of calcium and magnesium cation, makes the concentration of calcium and magnesium cation in salt water go to zero, and the residue so far eliminated in salt water is hardDegree.
Further, it further includes the second thickener 205 and the second centrifugal dehydrator 206 that temporary hardness, which eliminates unit 2, and secondThe import of thickener 205 is connect with the outlet of sedimentation basin 204, the discharge port of the second thickener 205 and the second centrifugal dehydrator 206Import connection, the water out of the second thickener 205, the second centrifugal dehydrator 206 water out with chelating resin filter301 import connection.
Further, chelating resin filter 301 is also connect with regenerated acid dosing tank 303, regenerates chelating tree by picklingRouge.In addition, chelating resin filter 301 is exported equipped with backwash waste, backwash waste outlet and quick lime reaction tank 201 intoMouth connection, pickling waste waters are neutralized by quick lime, do not generate any waste water.
Further, sedimentation basin 204 is inclined-plate clarifying basin, and quick lime dosing tank is equipped on quick lime reaction tank 201207, it is equipped with coagulant dosing tank 208 on coagulative precipitation tank 202, flocculant dosing tank is equipped on flocculation sedimentation tank 203209。
Further, crystallizer 101 includes crystallizing tank 111, guide shell 112, blender 113 and capping 114, guide shell112 are arranged in the inside of crystallizing tank 111, and blender 113 is arranged in guide shell 112, and blender 113 is propeller agitator,The middle and lower part of crystallizing tank 111 is arranged in the import of crystallizer 101, exports in the bottom of crystallizing tank 111 equipped with magma, crystallizing tank111 top is equipped with settling section 116, and ring cavity 117, crystallizer are formed between the top of crystallizing tank 111 and the outer wall for covering 114The bottom of ring cavity 117 is arranged in 101 water out 118.Crystallizer 101 at work, under the promotion of blender 113, water flowIt can decline along the inner wall of guide shell 112 and rise along the outer wall of guide shell 112, to form circulation, be stirred by adjustingThe revolving speed of device 113 is mixed, the rate of water flow rising and decline can be made into 9 times of 101 strong brine flow velocity of crystallizer, i.e. crystalline substance liquidReflux ratio is 800%.
Further, the top of crystallizing tank 111 is equipped with outward in the expansion segment of 30 ° of angles expansion, is set at the top of expansion segmentThere is the overflow baffle 119 arranged vertically, the region that expansion segment and overflow baffle 119 are formed is settling section 116, overflow baffle 119Ring cavity 117 is formed between the outer wall of capping 114.The salt water of the removal permanent hardness obtained by crystallization is via overflow baffle119 spill into water out 118, eliminate unit 2 hence into temporary hardness.
Embodiment two:
The present embodiment the difference is that only with embodiment one: it further includes more medium filter that residual hardness, which eliminates unit 3,304, the water out of sedimentation basin 204 is connect with the import of more medium filter 304, the outlet of more medium filter 304 and chelatingThe import of resin filter 301 connects, and the outlet of chelating resin filter 301 connects discharge pipe line.The setting of rest part is equalIt is identical as previous embodiment.More medium filter 304 can remove trace suspension object in water removal, to avoid the pollution to resin.
In addition, the backwash waste of more medium filter 304 and the acid-bearing wastewater of chelating resin filter 301 can pass throughWaste water water pipe is introduced into quick lime reaction tank 201, utilizes backwash waste again.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claimSubject to enclosing.