CN102010086B - Method for treating mercury-containing wastewater with three-section continuous process - Google Patents
Method for treating mercury-containing wastewater with three-section continuous process Download PDFInfo
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- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 69
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002351 wastewater Substances 0.000 title claims abstract description 41
- 238000010924 continuous production Methods 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000010802 sludge Substances 0.000 claims abstract description 13
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 12
- 239000000701 coagulant Substances 0.000 claims abstract description 3
- 230000001105 regulatory effect Effects 0.000 claims abstract 2
- 238000012545 processing Methods 0.000 claims description 24
- 239000011734 sodium Substances 0.000 claims description 15
- 238000001179 sorption measurement Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 10
- 239000005997 Calcium carbide Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000006228 supernatant Substances 0.000 claims description 8
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 8
- 229910001385 heavy metal Inorganic materials 0.000 claims description 7
- 239000003463 adsorbent Substances 0.000 claims description 6
- 244000144992 flock Species 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 5
- 239000002562 thickening agent Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000011067 equilibration Methods 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 3
- 230000016615 flocculation Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000002594 sorbent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000002244 precipitate Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 2
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical group [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract 2
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 239000002699 waste material Substances 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 7
- 238000003912 environmental pollution Methods 0.000 description 4
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- -1 Mercury ions Chemical class 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical group [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a method for treating mercury-containing wastewater in polyvinyl chloride (PVC) resin production, comprising the following steps: regulating the PH value of the mercury-containing wastewater to be 9-11, and pumping the mercury-containing wastewater into a reaction tank by a pump, and adding sinking agent with the mass concentration of 0.5-0.6 into the reaction tank for full reaction at the meantime, wherein the sinking agent is a Na2S solution, and the mass concentration ratio of the Hg and Na2S of the sinking agent is equal to (1:5)-(1:20); and then adding inorganic coagulant with the mass concentration of 0.01-0.03, naturally precipitating the generated HgS flocculent precipitate, filtering to obtain the supernate which reaches emission standard, and transmitting the precipitated HgS flocculent precipitate to a sludge concentration tank. By utilizing the method in the invention, the problem of environment pollution caused by poor treatment effect on high-concentration mercury-containing wastewater produced in the polrvinyl chloride (PVC) resin industry is solved. The method has the advantage of simple and reasonable process, and the like, is easy to implement, can be widely applied to the treatment of mercury-containing wastewater and is especially suitable for treatment of the mercury-containing wastewater in the polrvinyl chloride (PVC) resin production.
Description
Technical field:
The present invention relates to a kind of method of industrial mercury-containing waste water advanced treatment, particularly be applicable to the method that the mercury-containing waste water in the polyvinyl chloride resin production is processed.
Background technology:
Polyvinyl chloride is one of five large general-purpose plastics, be widely used in industry, agricultural, national defence, the key areas such as chemical building material, its production method commonly used mainly contains process for oxychlorination of ethylene and carbide acetylene method, increasingly mature because of China's calcium carbide aboundresources and carbide acetylene method Technology, so that generated by polyvinyl chloride by calcium carbide output accounts for 63.4% (ending for the end of the year 2009) of China's polyvinyl chloride ultimate production, but it all can produce mercury pollution in producing, show: the mercury whereabouts of generated by polyvinyl chloride by calcium carbide production process mainly is useless mercury catalyst, mercurous waste active carbon, mercurous waste hydrochloric acid, waste lyes etc. account for respectively mercury chloride and use 36% of total amount, 8%, 51%, 5%.At present, useless mercury catalyst and useless mercury gac are processed producer's recycling by the Hazardous wastes that qualification is arranged, the mercury chloride rate of recovery approximately 75%; And mercurous waste hydrochloric acid, waste lye (being mercury-containing waste water) etc. only have 20% to carry out the harmless treatment of hydrochloric acid degree of depth desorption and mercury, and major part is also properly disposed.The treatment process commonly used of mercury-containing waste water has been utilized Hg
2++ Na
2S → HgS ↓ principle, its shortcoming be process thoroughly, difficulty in filtration is large.
Announced among the Chinese patent CN 1673117A " a kind for the treatment of process of mercury-containing waste water ", its method is: add Hg and Na in processed water
2The mol ratio of S is 1: 1-1: 1.1, volumetric molar concentration is the Na of 0.1-0.2
2S solution makes Hg and Na in the processed water
2The S reaction generates HgS, regulate pH value between 7-9, again take Hg: the mol ratio of organic floculant is 1: 0.01-1: 0.02 adds volumetric molar concentration is the organic floculant of 0.01-0.02, generate the HgS flocks, with the gained material filtering, the HgS flocks is separated with processed water, obtain processing the qualified aqueous solution.But there is following shortcoming in the method: the one, used single precipitation agent Na
2S, the grain diameter of the difficulty soluble salt HgS of generation is very little, separation difficulty, and Na
2S when S is excessive
2-Generate HgS with HgS
2 2-Complex ion and dissolving affects the removal of mercury, and to environment, secondly, unexposed concrete reaction unit, if use the popular response device, shortcoming is that jar structure is single, without corresponding precipitation structure, so removal efficiency of mercury is poor; The 2nd, the PH of the method is controlled between the 7-9, to Hg
2+Ion, pH value mercury ion in the 5-8 scope almost all is hydrolyzed to Hg (OH) 2, is unfavorable for the removal of mercury, causes environmental pollution; The 3rd, the flocculation agent that the method is used is organic floculant, and the residual monomer of this class superpolymer has " three cause " effect (teratogenesis, carcinogenic, mutagenesis), and the method is not processed it, can cause environmental pollution; The 4th, in its specification sheets filter method is not done any further specifying, namely use ordinary method (sieve plate or filter membrane), this exists operation inconvenience and high in cost of production shortcoming, and affect the clearance of mercury, can only reach the highest permission emission concentration of first kind pollutent in the integrated wastewater discharge standard (first kind pollutent refers to and can accumulate, HUMAN HEALTH is produced long-range detrimentally affect person) after the processing in environment or animals and plants; The 5th, the unexposed equipment used of above-mentioned patent and corresponding operating and concrete technology mainly are the Hg to generally acknowledging
2+The precipitation principle carry out, its industrial applicibility is relatively poor.
Summary of the invention:
Thereby the invention reside in the high density mercury-containing waste water poor processing effect that has solved present calcium carbide route production polyvinyl chloride (PVC) RESINS industrial furnace synthesis procedure generation and cause the problem of environmental pollution, and then a kind of Hg is provided
2+Process thoroughly, pollute little, less investment, technique advantages of simple, easily implement, the method for three sections continuous processing advanced treatment of mercury-containing wastewaters of instant effect.
The technical solution used in the present invention is: a kind of three sections continuous processings are processed the method for mercury-containing waste water, comprise PH equalizing tank, one-level transferpump, first class reaction pot, two-stage conveying pump, second order reaction tank, three grades of transferpumps, third order reaction tank, the multi-section type adsorption beds that link to each other successively and the equipment for separating liquid from solid of processing mercury-containing sludge.Utilize the method for third order reaction sedimentation, with the mercurous waste hydrochloric acid that produces in the generated by polyvinyl chloride by calcium carbide production, the mercury-containing waste waters such as waste lye, be collected to the PH equalizing tank, adding sulfuric acid or sodium hydroxide according to the PH of mercury-containing waste water regulates its PH and is adjusted to 9-11, squeezed in the first class reaction pot by the one-level transferpump, adding simultaneously heavy metal settling agent in retort fully reacts, and then adding inorganic flocculating agent, the HgS flocks natural sedimentation that generates is got off, the gained supernatant liquor squeezed into by pump through stable chute carry out second order reaction in the second order reaction tank, operate same first order reaction, and the supernatant liquor of gained is squeezed into three reactor with pump and is carried out third order reaction, operate same first order reaction, the supernatant liquor that produce this moment, behind the multi-section type adsorption bed, must reach the aqueous solution of emission standard, the mercury-containing sludge that settles down in every first order reaction tank then flows automatically and enters sludge thickener, arrive equipment for separating liquid from solid by sludge pump again, gained filtrate is returned the PH equalizing tank, the sedimentation removal of mercury that circulates reaction, the gained filter cake leaves the useless storehouse of danger, unified transporting in.
Described a kind of three sections continuous processings are processed the method for mercury-containing waste water, and the heavy metal settling agent of use contains following component: reactant Na
220～60 parts of S, flocculation agent Fe
3+10～20 parts, 1～20 part of coagulant aids polyacrylamide, 10～40 parts in water, Na
2S elder generation and Fe
3+, polyacrylamide, water add mercury-containing waste water after mixing, add Hg in processed water: the mass concentration ratio of heavy metal settling agent is 1: 5-1: 20.
Described a kind of three sections continuous processings are processed the method for mercury-containing waste water, and PH is controlled at 9-11, to Hg
2+Ion can generate the precipitation HgS that is insoluble in water with sodium sulphite at weakly alkaline (pH value 9-11) mercury ion, has avoided mercury ion to be hydrolyzed to Hg (OH)
2, so that precipitin reaction is more abundant, be conducive to the removal of mercury.
Described a kind of three sections continuous processings are processed the method for mercury-containing waste water, use be inorganic flocculating agent FeCl
3, solved the problem of environmental pollution that uses organic floculant to cause in the prior art, secondly, because FeCl
3In water, easily form Fe (OH)
2And Fe (OH)
3Colloid, these colloids can not only the Adsorption of Mercury ions, and can capture and wrap up in mercury ion and the Na that holds up suspension
2The S coprecipitation is got off, and plays good coagulating sedimentation effect, is conducive to further improve removal of mercury efficient.
Described a kind of three sections continuous processings are processed the method for mercury-containing waste water, the retort of using mainly comprises: the bottom is conical cylindrical shell, tank inside is provided with stirring, baffle plate, swash plate group, vertically-guided pipe, tank top is provided with dosing import, air exhauster, and the tank bottom is provided with stable chute and the equilibration tube that spoil disposal exports and the tank side is connected with tank and forms.Wherein retort bottom adopt conical design can make the flocculent precipitate precipitation better, faster, and spoil disposal is convenient; Agitator links to each other with shell of reactor in reactor, adopts the effect of having played stirring and having supported after this structure; Its internal baffle part can make that stirring is more abundant, reaction is more complete.Use this retort to be conducive to further improve removal of mercury efficient.
Described a kind of three sections continuous processings are processed the method for mercury-containing waste water, a kind of three sections parallel multi-section type adsorption beds after tertiary treatment, have been increased, it mainly comprises: a cylindrical shell, cylindrical shell one end is that liquid-inlet, the other end are liquid exit, cylindrical shell Inner Front End and end are provided with sieve plate, are provided with adsorbent A and adsorbent B between inner barrel two sieve plates.Cylindrical shell is horizontal; Wherein adsorbent A is granular active carbon, and it has obvious Adsorption effect to peculiar smell, colloid and pigment, metal mercury ions etc. in the water, and flows because shaping particles is difficult, is difficult for blocking, and its high adsorption capacity carries and changes conveniently; Adsorbent B is molecular sieve, and it is to Hg
2+Stronger adsorption rate is arranged.The purifying treatment of processing as mercury-containing waste water, but multi-section type adsorption bed Effective Raise effluent quality, and technique advantages of simple, investment are little, instant effect, decontamination process non-secondary pollution, and can be widely used in the PVC Industry sewage disposal.
The factor of this contaminate environment of mercury in the high density mercury-containing waste water that the present invention produces by calcium carbide route production polyvinyl chloride (PVC) RESINS industrial furnace synthesis procedure, thus make treated mercury-containing waste water can reach emission standard; And the mercury that removes finally is recovered with the mud cake form, and then reaches the purpose of protection of the environment; Simultaneously also reduce production cost, improved economic benefit.The present invention is in line with the purpose of protection of the environment, energy-saving and emission-reduction; perfect by the single shortcoming without corresponding precipitation structure of popular response apparatus structure has been carried out, increased the purifying processing device multi-section type adsorption bed of processing rear mercury-containing waste water and the equipment for separating liquid from solid that separates processing rear mercury-containing sludge.On the one hand so that Hg
2+Processing is thorough, pollution is little; On the other hand because the equipment that native system increases is few, invest little, easily enforcement; Technique advantages of simple simultaneously can effectively reach the purpose of energy-saving and emission-reduction, protection of the environment.The present invention can be widely used in the processing of mercury-containing waste water, is specially adapted to that mercury-containing waste water in the polyvinyl chloride resin production processes.
Description of drawings:
Fig. 1 is the embodiments of the invention process flow sheet;
Among Fig. 1: 1 is that PH equalizing tank, 2 is that pump, 3 is that retort, 4 is that multi-section type strainer, 5 is that equipment for separating liquid from solid, 6 is sludge thickener.
Embodiment:
In accompanying drawing 1, the present embodiment comprises the steps: that mercury-containing waste water is adjusted to 9-11 through PH equalizing tank 1 with PH, is squeezed in the retort 3 by pump 2, adds Hg: Na simultaneously in retort
2The mass concentration ratio of S=1: 5-1: 20, mass concentration is the sinking agent Na of 0.5-0.6
2S solution fully reacts, then add the inorganic flocculating agent that mass concentration is 0.01-0.03, the HgS flocks natural sedimentation that generates is got off, and supernatant liquor reaches emission standard, the decontamination mud thickener 6 behind equipment for separating liquid from solid 5 of the HgS throw out after the precipitation after multi-section type strainer 4 filters.
Another embodiment difference is Na
2S elder generation and Fe
3+, polyacrylamide, water add mercury-containing waste water after mixing, and can be Na
2S and Fe
3+, the arbitrary component of polyacrylamide or their mixture mix.
Another embodiment difference is that described retort can be two groups, three groups, four groups or five groups, and links to each other successively, and concrete quantity can be decided according to practical condition.
Another embodiment difference is that described multi-section type adsorption bed can be three groups, four groups, five groups or six groups, and concrete quantity can be decided according to practical condition.
Below be workflow of the present invention and principle:
From the mercurous waste hydrochloric acid that produces in the generated by polyvinyl chloride by calcium carbide production, the mercury-containing waste waters such as waste lye, be collected to the PH equalizing tank, regulate its PH and be adjusted to 9-11, squeezed in the retort by transferpump, adding simultaneously heavy metal settling agent in retort fully reacts, and then adding inorganic flocculating agent, the HgS flocks natural sedimentation that generates is got off, the supernatant liquor that produces, behind the multi-section type adsorption bed, must reach the aqueous solution of emission standard, the mercury-containing sludge that settles down in retort then flows automatically and enters sludge thickener, arrive equipment for separating liquid from solid by sludge pump again, gained filtrate is returned the PH equalizing tank, the sedimentation removal of mercury that circulates reaction, and the gained filter cake leaves the useless storehouse of danger in, unification is transported, thereby reaches the purpose of removal of mercury environmental contamination reduction.
Claims (4)
1. the method for three sections continuous processings processing mercury-containing waste water is characterized in that comprising pH regulator pond, one-level transferpump, first class reaction pot, two-stage conveying pump, second order reaction tank, three grades of transferpumps, third order reaction tank, the multi-section type adsorption beds that link to each other successively and the equipment for separating liquid from solid of processing mercury-containing sludges; Utilize the method for third order reaction sedimentation, with the mercury-containing waste water that produces in the generated by polyvinyl chloride by calcium carbide production, be collected to the pH regulator pond, pH adding sulfuric acid or sodium hydroxide according to mercury-containing waste water are regulated its pH regulator to 9-11, squeezed in the first class reaction pot by the one-level transferpump, adding simultaneously heavy metal settling agent in retort fully reacts, and then adding inorganic flocculating agent, the HgS flocks natural sedimentation that generates is got off, the gained supernatant liquor squeezed into by pump through stable chute carry out second order reaction in the second order reaction tank, operate same first order reaction, and the supernatant liquor of gained is squeezed into the third order reaction tank with pump and is carried out third order reaction, operates same first order reaction, the supernatant liquor that produce this moment, behind the multi-section type adsorption bed, must reach the aqueous solution of emission standard, the mercury-containing sludge that settles down in every first order reaction tank then flows automatically and enters sludge thickener, arrives equipment for separating liquid from solid by sludge pump again, gained filtrate is returned the pH regulator pond, the sedimentation removal of mercury that circulates reaction; Heavy metal settling agent contains the component of following umber: reactant Na
220 ~ 60 parts of S, flocculation agent Fe
3+10 ~ 20 parts, 1 ~ 20 part of coagulant aids polyacrylamide, 10 ~ 40 parts in water, Na
2S elder generation and Fe
3+, polyacrylamide, water add mercury-containing waste water after mixing, add Hg in processed water: the mass concentration ratio of heavy metal settling agent is 1:5-1:20.
2. a kind of three sections continuous processings according to claim 1 are processed the method for mercury-containing waste water, it is characterized in that: described retort comprises a cylindrical shell, the cylindrical shell upper end is provided with lid, cover and be provided with the dosing import, agitator, air exhauster, the cylindrical shell side is provided with liquid-inlet, the liquid level bypass, the vertically-guided pipe, vertically-guided Guan Yiduan stretches into the cylindrical shell inner spout and is directed upwardly vertical with horizontal direction, the other end links to each other with stable chute top, stable chute is provided with equilibration tube, equilibration tube links to each other with the air exhauster inlet pipe, the stable chute lower side is provided with liquid outlet tube, the cylindrical shell bottom is provided with the cone bucket, the vertex of a cone is provided with the spoil disposal outlet, the cylindrical shell internal upper part is provided with sloping plate unit, and agitator passes sloping plate unit in the place, axle center, and cylinder inboard wall is provided with baffle plate, baffle plate is positioned at has certain gap, liquid-inlet with cylinder inboard wall below the sloping plate unit, the dosing import, air exhauster, the vertically-guided pipe, liquid exit, in the spoil disposal outlet valve is arranged all.
3. a kind of three sections continuous processings according to claim 1 are processed the method for mercury-containing waste water, it is characterized in that: described multi-section type adsorption bed comprises a cylindrical tube, cylindrical shell Inner Front End and end are provided with sieve plate, inner barrel is adsorbent A, adsorbent B, two kinds of sorbent materials separate with sieve plate, and cylindrical shell one end is that liquid-inlet, the other end are liquid exit.
4. a kind of three sections continuous processings according to claim 1 are processed the method for mercury-containing waste water, and it is characterized in that: described multi-section type adsorption bed is at least three groups.
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| CN102815809B (en) * | 2011-06-10 | 2015-09-23 | 上海乐泽环境工程有限公司 | A kind of method and system thereof processing high chlorine mercury containing waste water in chlor-alkali industry |
| CN102372377B (en) * | 2011-09-09 | 2013-06-12 | 天辰化工有限公司 | Method for advanced treatment of mercury-containing wastewater |
| CN102381749B (en) * | 2011-09-09 | 2013-08-14 | 天辰化工有限公司 | Method for treating low-concentration mercury-containing wastewater |
| CN104230085B (en) * | 2014-09-14 | 2016-03-02 | 新疆中泰化学股份有限公司 | Mercury-containing waste water treatment method in generated by polyvinyl chloride by calcium carbide production |
| CN104438285B (en) * | 2014-11-06 | 2019-12-24 | 中国科学院生态环境研究中心 | Method for innocent treatment of waste mercury catalyst by mechanical ball milling with sulfur as additive |
| CN106698728A (en) * | 2015-07-13 | 2017-05-24 | 上海氯德新材料科技有限公司 | Method for treating mercury-containing wastewater |
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