CN203200095U - Wet-process desulfurization waste water treatment device of lime stone and gypsum - Google Patents
Wet-process desulfurization waste water treatment device of lime stone and gypsum Download PDFInfo
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- CN203200095U CN203200095U CN 201320159563 CN201320159563U CN203200095U CN 203200095 U CN203200095 U CN 203200095U CN 201320159563 CN201320159563 CN 201320159563 CN 201320159563 U CN201320159563 U CN 201320159563U CN 203200095 U CN203200095 U CN 203200095U
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- 239000010440 gypsum Substances 0.000 title claims abstract description 15
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 12
- 230000023556 desulfurization Effects 0.000 title abstract description 11
- 235000019738 Limestone Nutrition 0.000 title abstract 4
- 239000006028 limestone Substances 0.000 title abstract 4
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 144
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000011010 flushing procedure Methods 0.000 claims abstract description 11
- 238000004069 wastewater sedimentation Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims description 10
- 229940059082 douche Drugs 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 30
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 229920002521 macromolecule Polymers 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 abstract 2
- 238000004062 sedimentation Methods 0.000 abstract 2
- -1 fluorine-chlorine ions Chemical class 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000007787 solid Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 241000370738 Chlorion Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
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Abstract
The utility model relates to a wet-process desulfurization waste water treatment device of lime stone and gypsum. The wet-process desulfurization waste water treatment device of lime stone and gypsum is characterized by comprising a sedimentation system, an ultra-filtration system, a reverse osmosis system, a cleaning device (23) and a flushing device (24), wherein the sedimentation tank comprises a waste water sedimentation tank (1), a water suction pump (19) and a filter (20); the ultra-filtration system comprises a tubular ultra-filtration membrane device (2), a ultra-filtration circulating pump (3), a pressure meter (21), a flow rate meter (22) and a ultra-filtration circulating barrel; and the reverse osmosis system comprises a primary reverse osmosis and a secondary reverse osmosis. According to the wet-process desulfurization waste water treatment device of lime stone and gypsum disclosed by the utility model, particles, macromolecular substances and the like in the waste water can be removed by a tubular ultra-filtration process; heavy metal ions, fluorine-chlorine ions and the like in the waste water can be removed by a reverse osmosis process, so that waste water including highly corrosive and high-concentration heavy metal ions and the like can be effectively desulphurized and recycled. Moreover, the device not only has small floor space, but also has low operation and maintenance cost.
Description
Technical field
The utility model relates to the wet desulphurization wastewater treatment equipment of a kind of Wingdale and gypsum, is mainly used in deep-etching, the processing of high density heavy metal limestone-gypsum desulfurization wastewater.Belong to technical field of waste water processing.
Background technology
In recent years, along with steel industry is built on a large scale, sintering, the SO that produces in the pellet formation process
2Account for more than 60% of iron and steel enterprise's production system, SO in control sintering, the pellet formation process
2Discharging become the control emphasis of iron and steel enterprise.
Wet method limestone-gypsum desulfurization technology obtains the favor that general application also is subjected to iron and steel enterprise simultaneously as mature and stable desulfurization technology in thermal power plant, becomes one of technology of energy-saving and emission-reduction emphasis popularization.So far, a lot of big section steel works such as Baosteel, Mei Gang, Anshan iron and steel plant, Nangang, heavy steel etc. have all successfully disposed wet method Wingdale gypsum sintering desulfuration device.For the enrichment that the prevents chlorion corrosion to sweetener, unavoidably must produce a spot of waste water in the process of wet desulphurization, the high salt of the high chlorine of such waste water, enriching heavy metal, being not suitable for being disposed to steel mill's waste water pipe network focuses on, more be not suitable for entering the municipal wastewater treatment system and focus on, it is big that outward transport focuses on cost of investment, so supporting suitable wastewater treatment equipment is imperative in the desulphurization system.
The most widely used method of desulfurization wastewater is traditional dosing method at present, this method complex process, occupation area of equipment is big, and operation and maintenance cost are all higher, most critical be that this technology is not high to the throttle rate of ion, water outlet can only be discharged and can not be returned desulphurization system and re-use.
Along with the maturation of internal membrane production technology, two membrane techniquies various fields at home are applied, and successfully are used for leather waste water, emulsifiable oil waste water processing, and membrane technique has become one of focus of waste water recycling research and utilization.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and the wet desulphurization wastewater treatment equipment of a kind of Wingdale and gypsum is provided, compact equipment, and floor space is little, can effectively reduce operation and maintenance cost, can return the desulfurization recycling simultaneously.
The purpose of this utility model is achieved in that the wet desulphurization wastewater treatment equipment of a kind of Wingdale and gypsum, it comprises sedimenting system, ultrafiltration system, reverse osmosis system, washing unit and flushing arrangement, described sedimenting system comprises the wastewater sedimentation case, lift pump and strainer, described ultrafiltration system comprises the tubular ultra-filtration membrane device, the ultrafiltration recycle pump, pressure warning unit, under meter and ultrafiltration circulation bucket, described reverse osmosis system comprise that first-stage reverse osmosis goes into bucket, two-pass reverse osmosis is gone into bucket, the first-stage reverse osmosis charging pump, first-stage reverse osmosis is gone into water pump, first-stage reverse osmosis security personnel strainer, the two-pass reverse osmosis charging pump, two-pass reverse osmosis is gone into water pump, two-pass reverse osmosis security personnel strainer, the first-stage reverse osmosis film device, the two-pass reverse osmosis film device, go out bucket and concentrated solution bucket;
The outlet of described wastewater sedimentation case links to each other with the entrance of ultrafiltration circulation bucket, pipeline between described wastewater sedimentation case and the ultrafiltration circulation bucket is provided with lift pump and strainer, the outlet of described ultrafiltration circulation bucket links to each other with the entrance of ultrafiltration recycle pump, described ultrafiltration outlet of circulating pump links to each other with the entrance of tubular ultra-filtration membrane device, pipeline between described ultrafiltration outlet of circulating pump and the tubular ultra-filtration membrane device is provided with pressure warning unit and under meter, the refluxing opening of described under meter links to each other with ultrafiltration circulation bucket, the outlet of described tubular ultra-filtration membrane device links to each other with the entrance that cleaning barrels and first-stage reverse osmosis are gone into bucket respectively, between the entrance of the outlet of described ultrafiltration circulation bucket and ultrafiltration recycle pump, be provided with douche can, the outlet of described cleaning barrels is gone into water pump with first-stage reverse osmosis respectively and is linked to each other with the entrance that two-pass reverse osmosis is gone into water pump, the outlet that described first-stage reverse osmosis is gone into bucket links to each other with the entrance that first-stage reverse osmosis is gone into water pump, described first-stage reverse osmosis is gone into water pump and is linked to each other with the entrance of first-stage reverse osmosis security personnel strainer with two-pass reverse osmosis security personnel strainer respectively with two-pass reverse osmosis entry pump outlet, the outlet of described first-stage reverse osmosis security personnel strainer and two-pass reverse osmosis security personnel strainer links to each other with the entrance of first-stage reverse osmosis charging pump with the two-pass reverse osmosis charging pump respectively, described first-stage reverse osmosis charging pump links to each other with the entrance of first-stage reverse osmosis film device with the two-pass reverse osmosis film device respectively with two-pass reverse osmosis feed pump outlet, the outlet of described first-stage reverse osmosis film device with go out bucket and go into bucket with two-pass reverse osmosis and link to each other, the outlet of described two-pass reverse osmosis film device respectively with go out bucket and link to each other with the concentrated solution bucket, the outlet that described two-pass reverse osmosis is gone into bucket links to each other with the entrance that two-pass reverse osmosis is gone into water pump.
It also comprises washing unit and flushing arrangement, and described washing unit links to each other with tubular ultra-filtration membrane device, first-stage reverse osmosis film device and two-pass reverse osmosis film device respectively with flushing arrangement.
Compared with prior art, the beneficial effects of the utility model are:
The utility model uses tubular type ultrafiltration and two kinds of technology of reverse osmosis, and in conjunction with advanced anti-corrosion of metal technology, extraordinary low flow high lift pump production technology, particles settling principle, by the particulate matter in the tubular ultra-filtration membrane removal waste water, macromolecular substance etc., by heavy metal ion, the fluorine chlorion in the reverse osmosis membrane removal waste water, can the desulfurization that waste water such as severe corrosive, high density heavy metal ion carry out effectively be recycled, equipment not only floor space is little, and operation and maintenance cost are low.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein:
Wastewater sedimentation case 1
Tubular ultra-filtration membrane device 2
Ultrafiltration circulation bucket 4
Douche can 5
First-stage reverse osmosis is gone into bucket 7
Go out bucket 8
Two-pass reverse osmosis is gone into bucket 9
Concentrated solution bucket 10
First-stage reverse osmosis charging pump 11
First-stage reverse osmosis is gone into water pump 12
Two-pass reverse osmosis charging pump 13
Two-pass reverse osmosis is gone into water pump 14
First-stage reverse osmosis security personnel strainer 15
Two-pass reverse osmosis security personnel strainer 16
First-stage reverse osmosis film device 17
Two-pass reverse osmosis film device 18
Under meter 22
Embodiment
Referring to Fig. 1, the utility model relates to the wet desulphurization wastewater treatment equipment of a kind of Wingdale and gypsum, mainly by sedimenting system, ultrafiltration system, reverse osmosis system, washing unit 23 and flushing arrangement 24 are formed, sedimenting system comprises wastewater sedimentation case 1, lift pump 19 and strainer 20, ultrafiltration system comprises tubular ultra-filtration membrane device 2, ultrafiltration recycle pump 3, pressure warning unit, under meter and ultrafiltration circulation bucket 4, described reverse osmosis system comprise that first-stage reverse osmosis goes into bucket 7, two-pass reverse osmosis is gone into bucket 9, first-stage reverse osmosis charging pump 11, first-stage reverse osmosis is gone into water pump 12, first-stage reverse osmosis security personnel strainer 15, two-pass reverse osmosis charging pump 13, two-pass reverse osmosis is gone into water pump 14, two-pass reverse osmosis security personnel strainer 16, add explosive barrel, dosing pump, first-stage reverse osmosis film device 17, two-pass reverse osmosis film device 18, go out bucket 8 and concentrated solution bucket 10.
The outlet of described wastewater sedimentation case 1 links to each other with the entrance of ultrafiltration circulation bucket 4, pipeline between described wastewater sedimentation case 1 and the ultrafiltration circulation bucket 4 is provided with lift pump 19 and strainer 20, the outlet of described ultrafiltration circulation bucket 4 links to each other with the entrance of ultrafiltration recycle pump 3, the outlet of described ultrafiltration recycle pump 3 links to each other with the entrance of tubular ultra-filtration membrane device 2, pipeline between the outlet of described ultrafiltration recycle pump 3 and the tubular ultra-filtration membrane device 2 is provided with pressure warning unit 21 and under meter 22, the refluxing opening of described under meter 22 links to each other with ultrafiltration circulation bucket 4, the outlet of described tubular ultra-filtration membrane device 2 links to each other with the entrance that cleaning barrels 6 and first-stage reverse osmosis are gone into bucket 7 respectively, between the entrance of the outlet of described ultrafiltration circulation bucket 4 and ultrafiltration recycle pump 3, be provided with douche can 5, the outlet of described cleaning barrels 6 is gone into water pump 12 with first-stage reverse osmosis respectively and is linked to each other with the entrance that two-pass reverse osmosis is gone into water pump 14, the outlet that described first-stage reverse osmosis is gone into bucket 7 links to each other with the entrance that first-stage reverse osmosis is gone into water pump 12, described first-stage reverse osmosis is gone into water pump 12 and is linked to each other with the entrance of first-stage reverse osmosis security personnel strainer 15 with two-pass reverse osmosis security personnel strainer 16 respectively with the outlet that two-pass reverse osmosis is gone into water pump 14, the outlet of described first-stage reverse osmosis security personnel strainer 15 and two-pass reverse osmosis security personnel strainer 16 links to each other with the entrance of first-stage reverse osmosis charging pump 11 with two-pass reverse osmosis charging pump 13 respectively, the outlet of described first-stage reverse osmosis charging pump 11 and two-pass reverse osmosis charging pump 13 links to each other with the entrance of first-stage reverse osmosis film device 17 with two-pass reverse osmosis film device 18 respectively, the outlet of described first-stage reverse osmosis film device 17 with go out bucket 8 and go into bucket 9 with two-pass reverse osmosis and link to each other, the outlet of described two-pass reverse osmosis film device 18 respectively with go out bucket 8 and link to each other with concentrated solution bucket 10, the outlet that described two-pass reverse osmosis is gone into bucket 9 links to each other with the entrance that two-pass reverse osmosis is gone into water pump 14, described washing unit 23 and flushing arrangement 24 respectively with tubular ultra-filtration membrane device 2, first-stage reverse osmosis film device 17 links to each other with two-pass reverse osmosis film device 18, flushing arrangement 23 usefulness tap water regularly wash ultra-filtration membrane and reverse osmosis membrane, the a large amount of solid particulates that accumulate in the film are cleaned removal by clear water, washing unit 24 main utilization acid, medicaments such as alkali are to ultra-filtration membrane, the organism that accumulates in the reverse osmosis membrane is removed, and prevents from stopping up because of organic enrichment in the film.
Desulfurization wastewater screws out oarse-grained gypsum a large amount of in the waste water through the eddy flow of waste-water vortex device, and the swirler overflow water enters sedimenting system as waste water, solid content＞200mg/L.After waste water enters the waste water sludge box, through 8h post precipitation, solid content＜80 mg/L.Through pump waste water is introduced in the ultrafiltration circulation bucket of ultrafiltration system, in this pipeline configuration filter, held back the solid particulate of particle diameter＞2mm in the waste water.The ultrafiltration recycle pump is squeezed into the tubular ultra-filtration membrane device with the waste water in the ultrafiltration circulation bucket, the service condition of the pressure monitoring ultra-filtration membrane by entrance, waste water through ultrafiltration membrane treatment, distribute 90% clear water as the entry of reverse osmosis through under meter, 10% has the waste water of certain solid content to be circulated to carries out the loop ultrafiltration film in the ultrafiltration circulation bucket and handles.
First-stage reverse osmosis charging pump 11 is introduced first-stage reverse osmosis security personnel strainer 15 with 2 water outlets of tubular ultra-filtration membrane device, avoid pipeline or first-stage reverse osmosis to go in the bucket 7 particulate matter and hard scale to the damage of reverse osmosis membrane, the waste water of process security personnel's strainer enters first-stage reverse osmosis and goes into water pump 12, this pump is the power-driven pump of low flow, high-lift, erosion resistance, and the lift that this pump can provide will satisfy the pressure rating requirement of first-stage reverse osmosis film.Waste water produces 75% water outlet and enters out bucket 8 through the first-stage reverse osmosis film, and other condensed water of 25% enter two-pass reverse osmosis and go into bucket 9 as the entry of two-pass reverse osmosis.Two-pass reverse osmosis is introduced by two-pass reverse osmosis charging pump 13, and through the operation identical with first-stage reverse osmosis, the water outlet of generation 15% enters out bucket, and 10% waste water enters concentrated solution bucket 10, carries out follow-up processing.When reverse osmosis system carried out, utilization simultaneously adds explosive barrel and dosing pump adds Scale inhibitors in pipeline, prevents the Ca in the waste water
2+, Mg
2+Increase and cause reverse osmosis membrane fouling, thereby cause obstruction.
Every 72h, with tap water ultra-filtration membrane and reverse osmosis membrane are regularly washed, a large amount of solid particulates that accumulate in the film are cleaned by clear water remove.
Every 168h, utilize medicaments such as acid, alkali that a large amount of organism that accumulates in ultra-filtration membrane, the reverse osmosis membrane is removed, prevent from stopping up because of organic enrichment in the film.
Claims (2)
1. the wet desulphurization wastewater treatment equipment of a Wingdale and gypsum, it is characterized in that it comprises sedimenting system, ultrafiltration system, reverse osmosis system, washing unit (23) and flushing arrangement (24), described sedimenting system comprises wastewater sedimentation case (1), lift pump (19) and strainer (20), described ultrafiltration system comprises tubular ultra-filtration membrane device (2), ultrafiltration recycle pump (3), pressure warning unit (21), under meter (22) and ultrafiltration circulation bucket (4), described reverse osmosis system comprise that first-stage reverse osmosis goes into bucket (7), two-pass reverse osmosis is gone into bucket (9), first-stage reverse osmosis charging pump (11), first-stage reverse osmosis is gone into water pump (12), first-stage reverse osmosis security personnel strainer (15), two-pass reverse osmosis charging pump (13), two-pass reverse osmosis is gone into water pump (14), two-pass reverse osmosis security personnel strainer (16), first-stage reverse osmosis film device (17), two-pass reverse osmosis film device (18), go out bucket (8) and concentrated solution bucket (10);
The outlet of described wastewater sedimentation case (1) links to each other with the entrance of ultrafiltration circulation bucket (4), pipeline between described wastewater sedimentation case (1) and the ultrafiltration circulation bucket (4) is provided with lift pump (19) and strainer (20), the outlet of described ultrafiltration circulation bucket (4) links to each other with the entrance of ultrafiltration recycle pump (3), the outlet of described ultrafiltration recycle pump (3) links to each other with the entrance of tubular ultra-filtration membrane device (2), pipeline between the outlet of described ultrafiltration recycle pump (3) and the tubular ultra-filtration membrane device (2) is provided with pressure warning unit (21) and under meter (22), the refluxing opening of described under meter (22) links to each other with ultrafiltration circulation bucket (4), the outlet of described tubular ultra-filtration membrane device (2) links to each other with the entrance that cleaning barrels (6) and first-stage reverse osmosis are gone into bucket (7) respectively, between the entrance of the outlet of described ultrafiltration circulation bucket (4) and ultrafiltration recycle pump (3), be provided with douche can (5), the outlet of described cleaning barrels (6) is gone into water pump (12) with first-stage reverse osmosis respectively and is linked to each other with the entrance that two-pass reverse osmosis is gone into water pump (14), the outlet that described first-stage reverse osmosis is gone into bucket (7) links to each other with the entrance that first-stage reverse osmosis is gone into water pump (12), described first-stage reverse osmosis is gone into water pump (12) and is linked to each other with the entrance of first-stage reverse osmosis security personnel's strainers (15) with two-pass reverse osmosis security personnel's strainers (16) respectively with the outlet that two-pass reverse osmosis is gone into water pump (14), described first-stage reverse osmosis security personnel's strainers (15) link to each other with the entrance of first-stage reverse osmosis charging pump (11) with two-pass reverse osmosis charging pump (13) respectively with the outlet of two-pass reverse osmosis security personnel's strainers (16), the outlet of described first-stage reverse osmosis charging pump (11) and two-pass reverse osmosis charging pump (13) links to each other with the entrance of first-stage reverse osmosis film device (17) with two-pass reverse osmosis film device (18) respectively, the outlet of described first-stage reverse osmosis film device (17) with go out bucket (8) and go into bucket (9) with two-pass reverse osmosis and link to each other, the outlet of described two-pass reverse osmosis film device (18) respectively with go out bucket (8) and link to each other with concentrated solution bucket (10), the outlet that described two-pass reverse osmosis is gone into bucket (9) links to each other with the entrance that two-pass reverse osmosis is gone into water pump (14).
2. the wet desulphurization wastewater treatment equipment of Wingdale according to claim 1 and gypsum, it is characterized in that it also comprises washing unit (23) and flushing arrangement (24), described washing unit (23) links to each other with tubular ultra-filtration membrane device (2), first-stage reverse osmosis film device (17) and two-pass reverse osmosis film device (18) respectively with flushing arrangement (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320159563 CN203200095U (en) | 2013-04-02 | 2013-04-02 | Wet-process desulfurization waste water treatment device of lime stone and gypsum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320159563 CN203200095U (en) | 2013-04-02 | 2013-04-02 | Wet-process desulfurization waste water treatment device of lime stone and gypsum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214111A (en) * | 2013-04-02 | 2013-07-24 | 江苏一同环保工程技术有限公司 | Wet desulphurization wastewater treatment device for limestone and gypsum |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214111A (en) * | 2013-04-02 | 2013-07-24 | 江苏一同环保工程技术有限公司 | Wet desulphurization wastewater treatment device for limestone and gypsum |
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