CN203922919U - A kind of active carbon desulfurization denitration acid-making process Waste Water Treatment - Google Patents
A kind of active carbon desulfurization denitration acid-making process Waste Water Treatment Download PDFInfo
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- CN203922919U CN203922919U CN201420286805.2U CN201420286805U CN203922919U CN 203922919 U CN203922919 U CN 203922919U CN 201420286805 U CN201420286805 U CN 201420286805U CN 203922919 U CN203922919 U CN 203922919U
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- circulating box
- acid
- waste water
- stoste
- absorption liquid
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 34
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 22
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 51
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 47
- 239000003513 alkali Substances 0.000 claims abstract description 38
- 239000000126 substance Substances 0.000 claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 29
- 238000005345 coagulation Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 238000005189 flocculation Methods 0.000 claims abstract description 13
- 230000016615 flocculation Effects 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 12
- 239000004571 lime Substances 0.000 claims abstract description 12
- 239000008267 milk Substances 0.000 claims abstract description 10
- 210000004080 milk Anatomy 0.000 claims abstract description 10
- 235000013336 milk Nutrition 0.000 claims abstract description 10
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 31
- 239000010802 sludge Substances 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 abstract description 54
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 36
- 229910021529 ammonia Inorganic materials 0.000 abstract description 17
- 238000001556 precipitation Methods 0.000 abstract description 11
- 238000001914 filtration Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 18
- 150000002500 ions Chemical class 0.000 description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 7
- 239000000920 calcium hydroxide Substances 0.000 description 6
- 235000011116 calcium hydroxide Nutrition 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000001117 sulphuric acid Substances 0.000 description 3
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- PVGBHEUCHKGFQP-UHFFFAOYSA-N sodium;n-[5-amino-2-(4-aminophenyl)sulfonylphenyl]sulfonylacetamide Chemical compound [Na+].CC(=O)NS(=O)(=O)C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=C1 PVGBHEUCHKGFQP-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model belongs to sewage treatment area, a kind of active carbon desulfurization denitration acid-making process Waste Water Treatment is disclosed, comprise: the waterwater entrance connecting successively by pipeline, first adjusts alkali groove, magnetic-coagulation groove, settler, second to adjust alkali groove, strainer and film absorption unit, described film absorption unit is connected with water outlet, mends acid mouth and absorption liquid discharge outlet; Described first adjusts alkali groove to be connected with lime milk feeding device, described magnetic-coagulation groove is connected with flocculation agent chemicals dosing plant, described second adjusts alkali groove to be connected with sodium hydroxide chemicals dosing plant, and described lime milk feeding device, flocculation agent chemicals dosing plant and sodium hydroxide chemicals dosing plant are all connected with production water inlet.The utility model is by adopting the processing mode of " absorption of magnetic-coagulation precipitation+filtrations+film ", extremely can emissions status by wastewater treatment, and treating processes employing film absorption unit, reclaims the ammonia in waste water again, has reduced the cost of wastewater treatment; Film absorption unit comprises multistage, has further improved the rate of recovery of ammonia.
Description
Technical field
The utility model relates to technical field of sewage, particularly a kind of active carbon desulfurization denitration acid-making process Waste Water Treatment.
Background technology
In active carbon desulfurization denitrating technique, adopt the SO in charcoal absorption flue gas
2, NO
xand the multiple pollutant such as heavy metal ion.Adsorbing saturated activated carbon is transported to Analytic Tower and carries out high temperature parsing; In Analytic Tower, SO
2form Deng sour gas with gaseous state discharges; Some heavy metals are also resolved gas with gaseous state or dust state and take out of together.
For improving denitrification efficiency, in above-mentioned adsorption process, can spray into the ammonia of 1.05～1.2 times of theoretical values, thereby unnecessary ammonia also discharges from activated carbon in high temperature resolving, the waste gas enrichment therefore parsing the SO of high density
2, NH
4 +, the pollutent such as heavy metal ion, and the dust that produces of gac senile abrasion.
In order to realize the recycling of resource, be rich in SO
2parsing waste gas deliver to relieving haperacidity workshop section extracting sulfuric acid.Owing to being used in the parsing waste gas of relieving haperacidity except containing the SO of high density
2outward, also enrichment most other detrimental impurity in sinter fume, in order to guarantee the purity of sulfuric acid product, before relieving haperacidity, need, with dilute sulphuric acid, waste gas is carried out to washing, purifying the NH in waste gas
4+, metal ion and dust suspended substance be transferred and enter in dilute sulphuric acid.The dirty acid solution that this washing operation produces is the application and needs active carbon desulfurization denitration acid-making process waste water to be processed, and accompanying drawing 2 is shown in by waste water quality table.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is: for solving in existing production, in the waste water that active carbon desulfurization denitrating technique produces, contain a large amount of NH
4 +, SO
4 2-, heavy metal ion and dust suspended substance, waste water impurity concentration severe overweight, cannot directly discharge, the problem that in waste water, a large amount of ions cannot be recycled.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of active carbon desulfurization denitration acid-making process Waste Water Treatment, it is characterized in that, comprise: the waterwater entrance connecting successively by pipeline, first adjusts alkali groove, magnetic-coagulation groove, settler, second to adjust alkali groove, strainer and film absorption unit, described film absorption unit is connected with water outlet, mends acid mouth and absorption liquid discharge outlet; Described first adjusts alkali groove to be connected with lime milk feeding device, described magnetic-coagulation groove is connected with flocculation agent chemicals dosing plant, described second adjusts alkali groove to be connected with sodium hydroxide chemicals dosing plant, described lime milk feeding device, flocculation agent chemicals dosing plant, sodium hydroxide chemicals dosing plant and acid adder are all connected with production water inlet, and the entrance of described acid adder is connected with mends acid mouthful; The outlet of described settler is connected with magnetic separating device, the magnetic outlet of described magnetic separating device is connected with magnetic-coagulation groove, the sludge outlet of described magnetic separating device is connected with sludge sump, described sludge sump is connected with the entrance of sludge dewatering equipment, and the filtrate outlet of described sludge dewatering equipment and first adjusts alkali groove to be connected.
Wherein, described strainer and second is adjusted between alkali groove and is provided with interconnective middle tank and filter-press pump, and described second adjusts alkali groove to be connected with middle tank, and described strainer is connected with filter-press pump.
Wherein, described strainer comprises interconnective more medium filter and activated charcoal filter, and described more medium filter is connected with filter-press pump, and described activated charcoal filter is connected with film absorption unit.
Wherein, described film absorption unit comprises absorption liquid circulating box and film absorptive unit, described film absorptive unit comprises stoste circulating box and membrane module, the outlet of described stoste circulating box is connected with the stoste entrance of membrane module, the stoste outlet of described film absorptive unit is connected with the entrance of stoste circulating box, and another entrance of described stoste circulating box is connected with activated charcoal filter; The loop exit of described absorption liquid circulating box is connected with the absorption liquid entrance of membrane module, the absorption liquid outlet of described membrane module is connected with the circulation fluid entrance of absorption liquid circulating box, described absorption liquid circulating box is also connected with absorption liquid discharge outlet with acid adder respectively, and described stoste circulating box is connected with acid adder.
Wherein, described film absorptive unit comprises multistage, and one-level stoste circulating box is connected with next stage stoste circulating box with activated charcoal filter, and final stage stoste circulating box is connected with water outlet and acid adder; The absorption liquid outlet of membrane modules at different levels is all connected with the circulation fluid entrance of absorption liquid circulating box, and the absorption liquid entrance of membrane modules at different levels is all connected with the circulation fluid entrance of absorption liquid circulating box.
Wherein, described sludge dewatering equipment is folded spiral shell formula sludge dewatering equipment.
(3) beneficial effect
Technique scheme tool has the following advantages: a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment, by adopting the processing mode of " absorption of magnetic-coagulation precipitation+filtration+film ", the wastewater treatment that active carbon desulfurization denitrating technique is produced is to can emissions status, treating processes adopts the film absorption unit of non-secondary pollution, ammonia in waste water is again reclaimed and made raw material and sell, reduced the cost of wastewater treatment; Film absorption unit, adopts multistage absorption, has further improved the rate of recovery of ammonia.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment;
Fig. 2 is the waste water quality table before a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment is processed;
Fig. 3 is the effluent quality table after a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment is processed.
Wherein, 1, produce water inlet; 2, lime milk feeding device; 3, flocculation agent chemicals dosing plant; 4, sodium hydroxide chemicals dosing plant; 5, waterwater entrance; 6, first adjust alkali groove; 7, magnetic-coagulation groove; 8, settler; 9, magnetic separating device; 10, second adjust alkali groove; 11, middle tank; 12, more medium filter; 13, activated charcoal filter; 14, sludge dewatering equipment; 15, sludge pump; 16, sludge sump; 17, film absorption unit; 18, stoste circulating box; 19, membrane module; 20, absorption liquid circulating box; 21, mend acid mouthful; 22, absorption liquid discharge outlet; 23, water outlet; 24, acid adder; 25, filter-press pump.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
The process flow sheet that Figure 1 shows that a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment, it comprises: the waterwater entrance 5, first connecting successively by pipeline adjusts alkali groove 6, magnetic-coagulation groove 7, settler 8, second to adjust alkali groove 10, strainer and film absorption unit 17; Described first adjusts alkali groove 6 to be connected with lime milk feeding device 2, described magnetic-coagulation groove 7 is connected with flocculation agent chemicals dosing plant 3, described second adjusts alkali groove 10 to be connected with sodium hydroxide chemicals dosing plant 4, described lime milk feeding device 2, flocculation agent chemicals dosing plant 3, sodium hydroxide chemicals dosing plant 4 and acid adder 24 are all connected with production water inlet 1, and the entrance of described acid adder 24 is connected with mends acid mouth 21; The outlet of described settler 8 is connected with magnetic separating device 9, the magnetic outlet of described magnetic separating device 9 is connected with magnetic-coagulation groove 7, the sludge outlet of described magnetic separating device 9 is connected with sludge sump 16, described sludge sump 16 is connected with the entrance of sludge dewatering equipment 14, and the filtrate outlet of described sludge dewatering equipment 14 and first adjusts alkali groove 6 to be connected.
Described strainer and second is adjusted between alkali groove 10 and is also provided with interconnective middle tank 11 and filter-press pump 25, and described second adjusts alkali groove 10 to be connected with middle tank 11, and described strainer is connected with filter-press pump 25.Described strainer comprises interconnective more medium filter 12 and activated charcoal filter 13, and described more medium filter 12 is connected with filter-press pump 25, and described activated charcoal filter 13 is connected with film absorption unit 17.
Described film absorption unit 17 comprises absorption liquid circulating box 20 and film absorptive unit, described film absorptive unit comprises stoste circulating box 18 and membrane module 19, the outlet of described stoste circulating box 18 is connected with the stoste entrance of membrane module 19, the stoste outlet of described film absorptive unit is connected with the entrance of stoste circulating box 18, and another entrance of described stoste circulating box 18 is connected with activated charcoal filter 13; The loop exit of described absorption liquid circulating box 20 is connected with the absorption liquid entrance of membrane module 19, the absorption liquid outlet of described membrane module 19 is connected with the circulation fluid entrance of absorption liquid circulating box 20, described absorption liquid circulating box 20 is also connected with absorption liquid discharge outlet 22 with acid adder 24 respectively, and described stoste circulating box 18 is connected with acid adder 24.
Described film absorptive unit comprises multistage, and one-level stoste circulating box 18 is connected with next stage stoste circulating box 18 with activated charcoal filter 13, and final stage stoste circulating box 18 is connected with water outlet 23 and acid adder 24; The absorption liquid outlet of membrane modules 19 at different levels is all connected with the circulation fluid entrance of absorption liquid circulating box 20, and the absorption liquid entrance of membrane modules 19 at different levels is all connected with the circulation fluid entrance of absorption liquid circulating box 20; Described sludge dewatering equipment 14 is folded spiral shell formula sludge dewatering equipment or plate-and-frame filter press.
The selecting and confirming of the utility model technical process:
Fig. 2 is the waste water quality table before processing, and this processing wastewater belongs to acid waste water, and Pollutants in Wastewater is mainly ultrahigh concentration NH
3-N, high concentration suspended matter and a small amount of heavy metal ion arsenic, lead, mercury.Fig. 3 is the effluent quality table after a kind of active carbon desulfurization denitration of the utility model acid-making process Waste Water Treatment is processed, known according to the contrast of Fig. 2 and Fig. 3, in waste water, ammonia-nitrogen content exceeds standard more than 5,000 times, and suspended substance exceeds standard 1,000 times, and heavy metal ion exceeds standard less.Therefore when selecting technical process, emphasis is the removal of ammonia nitrogen and suspended substance, and wherein the removal of ammonia nitrogen is the most important thing.
Due to this ammonia nitrogen in waste water very high concentrations, for being reclaimed, selected membrane absorption method.Other process for treating high ammonia nitrogen waste water comparisons such as membrane absorption method and air stripping method, ammonia still process method and reverse osmosis method, the maximum feature of membrane absorption method is, can under the condition of normal temperature, normal pressure, concentrate and reclaim the ammonia in waste water, non-secondary pollution produces, and has realized the resource utilization of ammonia-containing water.
In order to prevent the pollution of waste water to film, membrane absorption method has strict demand to influent quality, especially turbidity must be less than 5NTU (nephelometric turbidity unit, show instrument with incident light direction at an angle of 90 on measure scattered light intensity), therefore before waste water enters film absorption unit 17, need to carry out pre-treatment to remove suspended substance and heavy metal ion.
In water technology, flocculent precipitation is the common process of removing suspended substance and heavy metal ion, but being difficult to realize completely to the pollutent of excessive concentrations or mistake lower concentration, removes traditional flocculent precipitation, therefore for suspended substance and the relative heavy metal ion of crossing lower concentration of excessive concentrations in this waste water, the utility model adopts magnetic-coagulation technology, on the basis of traditional coagulation, in waste water, add magnetic, magnetic is under agitation suspended state, increase the collision probability between colloidal solid, thereby promoted the formation of flco; Magnetic is adsorbed in flco and has formed magnetic interpolymer, can enhanced coagulation effect.
While adopting film absorption unit 17 to absorb ammonia nitrogen, former water pH value need be adjusted to strong basicity (11-13) so that NH
4 +change free NH into
3; And in the Wastewater Pretreatment stage, in order to remove heavy metal ions in wastewater, only wastewater pH need be adjusted to 10; Therefore the utility model adopts the technique of two steps joint pH values, first adds alkali lye pH value is adjusted to 10 left and right, until heavy metal ion and suspended substance, after the processing of flocculation sediment process, then adds alkali lye pH value is adjusted to 11-13.
Milk of lime and sodium hydroxide are all conventional alkaline agents, all can form precipitation of hydroxide with heavy metal ion, but consider in this waste water containing high density SO
3 2-and SO
4 2-, therefore select milk of lime as the tune alkaline agent of the first tune alkali groove 6, wherein OH-is used for removing heavy metal ion, Ca
2+can with waste water in SO
3 2-or SO
4 2-form throw out, to reduce the salt content in waste water, reduce its impact on subsequent film treating processes.In addition milk of lime relative low price, can reduce running cost.Waste water after the flocculation sediment process heavy-metal ion removal of magnetic-coagulation groove 7 and settler 8, then adopt sodium hydroxide as the alkaline agent of the second tune alkali groove 10, is adjusted to 11-13 by pH value from 10, and no longer continues to adopt lime alkaline agent, to prevent Ca
2+the deposition of the fenestra of subsequent film absorption unit 17 is stopped up.
For further residual turbidity, the COD reducing in the former water that enters film absorption unit 17 (is chemical oxygen demand (COD), in waste water, wastewater treatment plant effluent and contaminated water, the oxygen equivalent of the material that can be oxidized by strong oxidizer) and heavy metal ion, after magnetic-coagulation precipitation, increase two-stage filtration, guarantee that described raw water quality meets the requirement of film absorption unit 17.
In sum, this technical process is defined as " absorption of magnetic-coagulation precipitation+filtration+film ", and its technical process is as follows:
(1) first waste water enters the first tune alkali groove 6, by lime milk feeding device 2, to the first tune alkali groove 6, adds milk of lime, adjusts waste water ph to 10 left and right, makes most of heavy metal ion generate precipitation of hydroxide, the Ca that milk of lime is brought into simultaneously
2+can with waste water in SO
3 2-or SO
4 2-form precipitation.
(2) waste water enters magnetic-coagulation groove 7, first by flocculation agent chemicals dosing plant 3, in magnetic-coagulation groove 7, adds flocculation agent, forms coagulation flco with the throw out in waste water; By magnetic separating device 9, in magnetic-coagulation groove 7, add magnetic again, magnetic is adsorbed in flco, forms magnetic interpolymer, has strengthened coagulation effect; Proportion due to magnetic is 5.2-5.3 simultaneously, has therefore greatly increased the proportion of coagulation flco, thereby has accelerated the settling velocity of flco.
(3) waste water gravity flow enters settler 8, after flco is separated from waste water, be deposited on settler 8 bottoms and form bed mud, sludge pump 15 through settler 8 afterbodys is sent into magnetic tripping device, isolated magnetic drops into magnetic-coagulation groove 7 again, and isolated mud enters sludge sump 16, through sludge pump 15, is promoted to folded spiral shell formula sludge dewatering equipment 14 dehydrations, make mud cake outward transport, filtrate is dropped into the first tune alkali groove 6 again; So far in waste water, most of heavy metal and suspended substance are all removed.Sludge dewatering equipment 14 can be selected folded spiral shell formula sludge dewatering equipment or plate-and-frame filter press, and wherein folded spiral shell formula sludge dewatering equipment does not stop up, and full automatic control can realize 24 hours unmanneds, is therefore optimal selection.
(4) supernatant liquor of settler 8 enters the second tune alkali groove 10, by sodium hydroxide chemicals dosing plant 4, to the second tune alkali groove 10, adds sodium hydroxide (or sodium carbonate) to adjust pH to 11-12, makes NH in waste water
4 +be converted into free state NH
3.Not adopting lime as lye pH adjustment herein, is in order to prevent Ca
2+the deposition that subsequent film is absorbed to the fenestra for the treatment of system is stopped up.
(5) waste water enter in the middle of tank 11, by lift pump, deliver to more medium filter 12 and activated charcoal filter 13 carries out two-stage filtration, i.e. depth type filtration, the water turbidity after filtration further reduces, and reaches the influent quality requirement of subsequent film absorption unit 17 completely.
(6) waste water after depth type filtration enters film absorption unit 17: waste water enters one-level stoste circulating box 18, and by recycle pump, pumps into the stoste entrance (being in the shell of membrane module 19) of membrane module 19, a part of NH in waste water
3 +one-level stoste circulating box 18 (being called shell side) is returned in the follow-up afterflow of opposite side that is diffused into film through fenestra; Absorption liquid adopts dilute sulphuric acid, pumps into the absorption liquid entrance (inner chambers of membrane module 19 hollow-fibre membranes) of membrane module 19 through absorption liquid circulating box 20, in inner chamber, along tunica fibrosa inwall and waste water countercurrent flow, has absorbed the NH coming from opposite side diffusion
3 +after flow back to absorption liquid circulating box 20 (being called tube side).Circular treatment like this, until ammonia-nitrogen content drops to pre-provisioning request in waste water.
Because the reduction of ammonia assimilated efficiency with solution ammonia concentration reduces, therefore the ammonia absorption stage adopts stage treatment, tertiary amine absorbs altogether:
One-level film absorbs: the former waste liquid circular treatment of one-level, and the waste liquid in one-level stoste circulating box 18 flows back to one-level stoste circulating box 18 after membrane module 19 is processed, and this step can make waste liquid ammonia nitrogen concentration be reduced to 1000mg/L, then proceeds in secondary waste liquid circulating box;
Secondary film absorbs: secondary stoste circular treatment, and make waste liquid ammonia nitrogen concentration lower than 10mg/L, waste liquid is proceeded in three grades of stoste circulating boxes 18;
Three grades of films absorb: three grades of stoste circular treatment, until ammonia nitrogen concentration is lower than 5mg/L, through acid adder 24, add acid for adjusting pH to 6-9 again, can reach the limit value of regulation in < < Iron And Steel Industry pollution discharge standard > > (GB13456-2012) or < < integrated wastewater discharge standard > > (GB8978-1996), waste water after processing drains into water outlet 23 from three grades of stoste circulating boxes 18, enter plant area's sewage network.
In film absorption unit 17, the absorption liquid in absorption liquid circulating box 20, by after membrane module 19 absorbing ammonias, finally forms the ammonium sulfate of 40% concentration, from absorption liquid discharge outlet 22, draws, and can be used as raw material and sells; Absorption liquid passes into absorption liquid circulation groove by benefit acid mouth 21 and the acid adder 24 of relieving haperacidity operation.
As can be seen from the above embodiments, the utility model is by adopting the processing mode of " absorption of magnetic-coagulation precipitation+filtration+film ", by a large amount of SO that contain that produce in active carbon desulfurization denitrating technique
2, NH
4 +, the pollutent such as heavy metal ion wastewater treatment to the state that can directly discharge, in treating processes, the NH in waste water
4 +again reclaimed, made the ammonium sulfate of 40% concentration, can be used as raw material and sell, effectively reduced the processing cost of system.First adjusts alkali groove 6 to adopt more cheap milk of lime to regulate the pH value of waste water, is in order to reduce costs, and removes sulfate radical in waste water class ion simultaneously; Second adjusts alkali groove 10 to adopt sodium hydroxide or sodium carbonate to regulate the pH value of waste water, is in order to prevent Ca
2+form precipitation, affect the treatment effect of subsequent film absorption unit 17; The ingress of film absorption unit 17 is provided with more medium filter 12 and activated charcoal filter 13, more medium filter 12 is a kind of existing installations, being arranged on is mainly in order to remove the impurity such as silt particle in waste water, suspended substance, colloid here, reduces waste water to the damage of film absorption unit 17 and pollution; Residual impurity and COD in 13 pairs of waste water of activated charcoal filter further adsorb, and the water turbidity of waste water is further reduced, and meet the processing requirements of film absorption unit 17 completely, avoid damaging film absorption unit 17.In view of the assimilated efficiency of ammonia can reduce with the reduction of solution ammonia concentration, film absorption unit 17 adopts multistage absorption, be provided with multistage stoste circulating box 18, every grade of stoste circulating box 18 is all furnished with membrane module 19, reduce successively the ammonia content in waste water, until ammonia content reaches emission standard, improved the recovery utilization rate of ammonia.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (6)
1. an active carbon desulfurization denitration acid-making process Waste Water Treatment, it is characterized in that, comprise: the waterwater entrance connecting successively by pipeline (5), first adjusts alkali groove (6), magnetic-coagulation groove (7), settler (8), second to adjust alkali groove (10), strainer and film absorption unit (17), described film absorption unit (17) is connected with water outlet (23), mends acid mouthful (21) and absorption liquid discharge outlet (22);
Described first adjusts alkali groove (6) to be connected with lime milk feeding device (2), described magnetic-coagulation groove (7) is connected with flocculation agent chemicals dosing plant (3), described second adjusts alkali groove (10) to be connected with sodium hydroxide chemicals dosing plant (4), described lime milk feeding device (2), flocculation agent chemicals dosing plant (3), sodium hydroxide chemicals dosing plant (4) and acid adder (24) are all connected with production water inlet (1), and the entrance of described acid adder (24) is connected with mends acid mouthful (21);
The outlet of described settler (8) is connected with magnetic separating device (9), the magnetic outlet of described magnetic separating device (9) is connected with magnetic-coagulation groove (7), the sludge outlet of described magnetic separating device (9) is connected with sludge sump (16), described sludge sump (16) is connected with the entrance of sludge dewatering equipment (14), and the filtrate outlet of described sludge dewatering equipment (14) and first adjusts alkali groove (6) to be connected.
2. active carbon desulfurization denitration acid-making process Waste Water Treatment as claimed in claim 1, it is characterized in that, between described strainer and the second tune alkali groove (10), be provided with interconnective middle tank (11) and filter-press pump (25), described second adjusts alkali groove (10) to be connected with middle tank (11), and described strainer is connected with filter-press pump (25).
3. active carbon desulfurization denitration acid-making process Waste Water Treatment as claimed in claim 2, it is characterized in that, described strainer comprises interconnective more medium filter (12) and activated charcoal filter (13), described more medium filter (12) is connected with filter-press pump (25), and described activated charcoal filter (13) is connected with film absorption unit (17).
4. active carbon desulfurization denitration acid-making process Waste Water Treatment as claimed in claim 3, it is characterized in that, described film absorption unit (17) comprises absorption liquid circulating box (20) and film absorptive unit, described film absorptive unit comprises stoste circulating box (18) and membrane module (19), the outlet of described stoste circulating box (18) is connected with the stoste entrance of membrane module (19), the stoste outlet of described film absorptive unit is connected with the entrance of stoste circulating box (18), and another entrance of described stoste circulating box (18) is connected with activated charcoal filter (13); The loop exit of described absorption liquid circulating box (20) is connected with the absorption liquid entrance of membrane module (19), the absorption liquid outlet of described membrane module (19) is connected with the circulation fluid entrance of absorption liquid circulating box (20), described absorption liquid circulating box (20) is also connected with absorption liquid discharge outlet (22) with acid adder (24) respectively, and described stoste circulating box (18) is connected with acid adder (24).
5. active carbon desulfurization denitration acid-making process Waste Water Treatment as claimed in claim 4, it is characterized in that, described film absorptive unit comprises multistage, one-level stoste circulating box (18) is connected with next stage stoste circulating box (18) with activated charcoal filter (13), and final stage stoste circulating box (18) is connected with water outlet (23) and acid adder (24); The absorption liquid outlet of membrane modules at different levels (19) is all connected with the circulation fluid entrance of absorption liquid circulating box (20), and the absorption liquid entrance of membrane modules at different levels (19) is all connected with the circulation fluid entrance of absorption liquid circulating box (20).
6. active carbon desulfurization denitration acid-making process Waste Water Treatment as claimed in claim 1, is characterized in that, described sludge dewatering equipment (14) is folded spiral shell formula sludge dewatering equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420286805.2U CN203922919U (en) | 2014-05-30 | 2014-05-30 | A kind of active carbon desulfurization denitration acid-making process Waste Water Treatment |
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| CN201420286805.2U CN203922919U (en) | 2014-05-30 | 2014-05-30 | A kind of active carbon desulfurization denitration acid-making process Waste Water Treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463579A (en) * | 2015-12-31 | 2016-04-06 | 浙江伯益环境科技有限公司 | Technological method for preparing calcium sulfate whiskers through activated carbon desulfurization |
| CN110745989A (en) * | 2019-10-25 | 2020-02-04 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
-
2014
- 2014-05-30 CN CN201420286805.2U patent/CN203922919U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105463579A (en) * | 2015-12-31 | 2016-04-06 | 浙江伯益环境科技有限公司 | Technological method for preparing calcium sulfate whiskers through activated carbon desulfurization |
| CN105463579B (en) * | 2015-12-31 | 2019-02-12 | 浙江伯益环境科技有限公司 | A kind of process preparing calcium sulfate crystal whiskers using active carbon desulfurization |
| CN110745989A (en) * | 2019-10-25 | 2020-02-04 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
| CN110745989B (en) * | 2019-10-25 | 2022-02-18 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
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