CN105906127A - Desulfurization wastewater near-zero release treatment system and method - Google Patents
Desulfurization wastewater near-zero release treatment system and method Download PDFInfo
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- CN105906127A CN105906127A CN201610406417.7A CN201610406417A CN105906127A CN 105906127 A CN105906127 A CN 105906127A CN 201610406417 A CN201610406417 A CN 201610406417A CN 105906127 A CN105906127 A CN 105906127A
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- desulfurization wastewater
- denitration
- crystallization
- zero release
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- 239000002351 wastewater Substances 0.000 title claims abstract description 48
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 40
- 230000023556 desulfurization Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002425 crystallisation Methods 0.000 claims abstract description 33
- 230000008025 crystallization Effects 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 11
- 239000011575 calcium Substances 0.000 claims abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011777 magnesium Substances 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 8
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 7
- 239000010413 mother solution Substances 0.000 claims abstract description 6
- 239000000706 filtrate Substances 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims abstract description 3
- 238000001471 micro-filtration Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 238000005660 chlorination reaction Methods 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 5
- 238000005370 electroosmosis Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 238000001223 reverse osmosis Methods 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Inorganic materials [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 238000005374 membrane filtration Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 229910001385 heavy metal Inorganic materials 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- 239000010802 sludge Substances 0.000 claims description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 18
- 239000011780 sodium chloride Substances 0.000 abstract description 9
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 3
- 238000001704 evaporation Methods 0.000 abstract 2
- 230000008020 evaporation Effects 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 229910017053 inorganic salt Inorganic materials 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- -1 sulfate radical Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a desulfurization wastewater near-zero release treatment system and method. Desulfurization wastewater passes through a purification unit at first, calcium, magnesium, silicon oxide and other scale forming matters and COD and other organic matters are removed, and filtering separation is performed to obtain salty mud; the obtained filtrate enters a reduction unit, the reduction unit adopts EDR or DTRO for performing concentration, recycle water is obtained to be recycled, some concentrated solution is returned to the purification unit, and some concentrated solution enters a denitration unit; sediments generated during a reaction of the denitration unit are filtered through a micro-filtration membrane, clean liquid enters an evaporation crystallization unit, evaporation, crystallization and separation are performed to obtain industrial sodium chloride, condensate water is recycled, and a small amount of crystallization mother solution is drained outwards and returned back to the purification unit and the denitration unit. Sodium chloride and other inorganic salt in desulfurization wastewater are effectively separated and recycled, meanwhile, the obtained recycle water completely meets the requirement for recycling, and the recovery rate is high.
Description
Technical field
The present invention relates to desulfurization wastewater processing technology field, be specifically related to the system and method for a kind of desulfurization wastewater near-zero release.
Background technology
The waste water using wet gypsum method desulfurization to produce contains substantial amounts of chloride ion, sulfate radical, calcium, magnesium plasma, and soluble solid is between 10000～40000 mg/L.If this kind of waste water is without processing and outer row further, it will to environmental danger.
Recycling further to desulfurization wastewater, and during the course the higher sodium chloride of value is separated and recovered, it is met the sodium chloride of industrial level, not only help solution environmental problem and have also obtained economic benefit, the large-scale application of desulfurization wastewater near-zero release is played an important role, is the directions that are continually striving to of those skilled in the art.
Summary of the invention
The technical problem to be solved is to provide a kind of desulfurization wastewater near-zero release processing system and method for above-mentioned prior art.
The present invention solves the technical scheme that the problems referred to above are used: a kind of desulfurization wastewater near-zero release processing system, including set gradually
Clean unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing unit: concentrate further desulfurization wastewater to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part returns clean unit, and another part enters denitration unit；
Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization unit: to concentrating clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is back to clean unit and denitration unit as recycle-water reuse, a small amount of mother solution of outer row.
Preferably, described minimizing unit is to use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or the combination of aforementioned upgrading unit.
Preferably, described evaporative crystallization unit is to use the outer crystallization mechanism for steam, or the crystallization mechanism of mechanical vapor-compression, and crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Desulfurization wastewater near-zero release processing method based on said system, including following operation,
Purify: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing: concentrate desulfurization wastewater further to concentrated solution, it is thus achieved that TDS reaches the concentrated solution of more than 90000mg/L, and a concentrated solution part returns clean unit, and another part enters denitration unit, the recycle-water reuse of gained；
Denitration: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is as recycle-water reuse, and a small amount of mother solution of outer row is back to purify and denitration operation.
Preferably, cleaning procedure uses Calx+soda, or Caustic soda+soda, or Calx+flue gas, or calcium chloride+soda, or any one combination with activated carbon aforementioned removes the easy scale forming matter of the calcium in desulfurization wastewater, magnesium and silicon oxide, heavy metal substance and COD type organic, then using micro-filtrate membrane filtration separation brine sludge and clear liquid, clear liquid enters next step minimizing operation.
Preferably, minimizing is through disc tube reverse osmosis (dt-ro) DTRO, or pole-reversing electroosmosis EDR, or the combination concentration of aforementioned upgrading unit.
Preferably, denitration uses calcium method denitration, and calcium chloride and sulfate radical react generation Gypsum Fibrosum, and use micro-filtration membrane to filter, clear liquid devaporation Crystallization Procedure.
Preferably, evaporative crystallization unit uses the outer crystallization mode for steam, or mechanical vapor-compression crystallization mode, and crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Compared with prior art, it is an advantage of the current invention that: the sodium chloride in desulfurization wastewater and other inorganic salts are efficiently separated and reclaimed, and the recycle-water obtained during concurrently separating fully meets reuse requirement.While solving environmental problem, obtain economic benefit, reduce the operating cost of desulfurization wastewater zero discharge treatment.
Accompanying drawing explanation
Fig. 1 is the structural representation of desulfurization wastewater near-zero release processing system in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As it is shown in figure 1, the desulfurization wastewater near-zero release processing system in the present embodiment, the clean unit including setting gradually: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；Minimizing unit: concentrate further desulfurization wastewater to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part returns clean unit, and another part enters denitration unit；Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；Evaporative crystallization unit: to concentrating clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is back to clean unit and denitration unit as recycle-water reuse, a small amount of mother solution of outer row.
Minimizing unit is to use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or the combination of aforementioned upgrading unit.
Evaporative crystallization unit is to use the outer crystallization mechanism for steam, or the crystallization mechanism of mechanical vapor-compression, and crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Desulfurization wastewater near-zero release processing method based on said system
Embodiment 1
Certain power plant desulfurization waste water TDS is 20000 mg/L, this waste water is after Calx+flue gas+active carbon purifying, entering minimizing EDR unit and being concentrated into TDS further is 120000 mg/L, dope 10% is back to clean unit, and 90% enters denitration unit, and dope reacts generation precipitation in denitration unit with calcium chloride, after the organic micro-filtrate membrane filtration of tubular type, gained clear liquid enters evaporative crystallization unit, separates and is dried to obtain sodium chloride, Condensate reuse.Through said system, can produce the sodium chloride meeting GB/T 5462-2003 II grade standard, Water Sproading rate reaches 97%.
Embodiment 2
Certain power plant desulfurization waste water TDS is 30000 mg/L, this waste water is after Caustic soda+soda purifies, entering minimizing DTRO unit and being concentrated into TDS further is 100000 mg/L, clear liquid reuse, and dope 20% is back to clean unit, 80% enters denitration unit, dope reacts generation precipitation in denitration unit with calcium chloride, after ceramic micro filter membrane filtration, enters evaporative crystallization unit, crystallization obtains sodium chloride, Condensate reuse.Through said system, can produce the sodium chloride meeting GB/T 5462-2003 II grade standard, Water Sproading rate reaches 96%.
In addition to the implementation, present invention additionally comprises the technical scheme that other embodiments, all employing equivalents or equivalence substitute mode are formed, all should fall within the scope of the hereto appended claims.
Claims (8)
1. a desulfurization wastewater near-zero release processing system, it is characterised in that: include setting gradually
Clean unit: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing unit: concentrate further desulfurization wastewater to concentrated solution, produce can the recycle-water of reuse, a concentrated solution part returns clean unit, and another part enters denitration unit；
Denitration unit: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization unit: to concentrating clear liquid evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is back to clean unit and denitration unit as recycle-water reuse, a small amount of mother solution of outer row.
Desulfurization wastewater near-zero release processing system the most according to claim 1, it is characterised in that: described minimizing unit is to use pole-reversing electroosmosis EDR, or disc tube reverse osmosis (dt-ro) DTRO, or the combination of aforementioned upgrading unit.
Desulfurization wastewater near-zero release processing system the most according to claim 1, it is characterized in that: described evaporative crystallization unit is to use the outer crystallization mechanism for steam, or the crystallization mechanism of mechanical vapor-compression, crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
4. a desulfurization wastewater near-zero release processing method, it is characterised in that: include following operation,
Purify: remove calcium, magnesium, the easy scale forming matter of silicon oxide and COD type organic in desulfurization wastewater；
Minimizing: concentrate desulfurization wastewater further to concentrated solution, it is thus achieved that TDS reaches the concentrated solution of more than 90000mg/L, and a concentrated solution part returns clean unit, and another part enters denitration unit, the recycle-water reuse of gained；
Denitration: the sulfate radical in precipitation waste water, filters and separates, clear liquid devaporation crystalline element；
Evaporative crystallization: to concentrated solution evaporative crystallization isolated industrial chlorinations sodium, condensed fluid is as recycle-water reuse, and a small amount of mother solution of outer row is back to purify and denitration operation.
Desulfurization wastewater near-zero release processing method the most according to claim 4, it is characterized in that: cleaning procedure uses Calx+soda, or Caustic soda+soda, or Calx+flue gas, or calcium chloride+soda, or any one combination with activated carbon aforementioned removes the easy scale forming matter of the calcium in desulfurization wastewater, magnesium and silicon oxide, heavy metal substance and COD type organic, then using micro-filtrate membrane filtration separation brine sludge and clear liquid, clear liquid enters next step minimizing operation.
Desulfurization wastewater near-zero release processing method the most according to claim 4, it is characterised in that: minimizing is through disc tube reverse osmosis (dt-ro) DTRO, or pole-reversing electroosmosis EDR, or the combination concentration of aforementioned upgrading unit.
Desulfurization wastewater near-zero release processing method the most according to claim 4, it is characterised in that: denitration uses calcium method denitration, and calcium chloride and sulfate radical react generation Gypsum Fibrosum, and use micro-filtration membrane to filter, clear liquid devaporation Crystallization Procedure.
Desulfurization wastewater near-zero release processing method the most according to claim 4, it is characterised in that: evaporative crystallization unit uses the outer crystallization mode for steam, or mechanical vapor-compression crystallization mode, and crystallizer uses forced circulation crystallizer, or draft tube baffle crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406417.7A CN105906127A (en) | 2016-06-12 | 2016-06-12 | Desulfurization wastewater near-zero release treatment system and method |
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| CN201610406417.7A CN105906127A (en) | 2016-06-12 | 2016-06-12 | Desulfurization wastewater near-zero release treatment system and method |
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| CN105906127A true CN105906127A (en) | 2016-08-31 |
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| CN201610406417.7A Pending CN105906127A (en) | 2016-06-12 | 2016-06-12 | Desulfurization wastewater near-zero release treatment system and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517629A (en) * | 2016-12-28 | 2017-03-22 | 北京国电龙源环保工程有限公司 | Limestone/gypsum desulfurization wastewater zero-discharge treatment equipment and limestone/gypsum desulfurization wastewater zero-discharge treatment method |
| CN106517606A (en) * | 2016-11-27 | 2017-03-22 | 杭州水处理技术研究开发中心有限公司 | Treating apparatus capable of realizing zero discharge of desulphurization wastewater from power plant |
| CN108211706A (en) * | 2018-02-12 | 2018-06-29 | 山东大学 | A kind of desulphurization denitration and wastewater zero discharge system and method for steel industry |
| CN108640397A (en) * | 2018-07-20 | 2018-10-12 | 刘柏海 | A kind of heat-engine plant desulfurized waste water treatment process based on inorganic adsorbent technology |
| CN110817925A (en) * | 2019-10-23 | 2020-02-21 | 江苏沙钢集团有限公司 | Method for resource utilization of desulfurized fly ash |
| CN113461233A (en) * | 2021-07-16 | 2021-10-01 | 青岛理工大学 | Composite device for hardness removal of industrial circulating cooling water and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106517629A (en) * | 2016-12-28 | 2017-03-22 | 北京国电龙源环保工程有限公司 | Limestone/gypsum desulfurization wastewater zero-discharge treatment equipment and limestone/gypsum desulfurization wastewater zero-discharge treatment method |
| CN108211706A (en) * | 2018-02-12 | 2018-06-29 | 山东大学 | A kind of desulphurization denitration and wastewater zero discharge system and method for steel industry |
| CN108640397A (en) * | 2018-07-20 | 2018-10-12 | 刘柏海 | A kind of heat-engine plant desulfurized waste water treatment process based on inorganic adsorbent technology |
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| CN110817925A (en) * | 2019-10-23 | 2020-02-21 | 江苏沙钢集团有限公司 | Method for resource utilization of desulfurized fly ash |
| CN113461233A (en) * | 2021-07-16 | 2021-10-01 | 青岛理工大学 | Composite device for hardness removal of industrial circulating cooling water and control method thereof |
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