CN106365232A - Low-temperature sprinkling and evaporation treatment method for desulfurization waste water - Google Patents
Low-temperature sprinkling and evaporation treatment method for desulfurization waste water Download PDFInfo
- Publication number
- CN106365232A CN106365232A CN201611004482.3A CN201611004482A CN106365232A CN 106365232 A CN106365232 A CN 106365232A CN 201611004482 A CN201611004482 A CN 201611004482A CN 106365232 A CN106365232 A CN 106365232A
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- Prior art keywords
- desulfurization wastewater
- desulfurization
- air
- waste water
- treatment
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a low-temperature sprinkling and evaporation treatment method for desulfurization waste water, comprising the steps: (1) storage; (2) settling treatment; (3) overflowing treatment; (4) evaporation treatment: countercurrent flowing and uniformly mixing air with atomized and sprinkled desulfurization waste water in an evaporation tower, evaporating the desulfurization waste water to be carried by air which achieves a saturated state at the temperature; (5) demisting treatment: removing large-particle-size liquid drops carried by the saturated moist air with a high-efficiency demister; and (6) final treatment: flowing clean saturated moist air into a desulfurization tower. The low-temperature sprinkling and evaporation treatment method for desulfurization waste water has simple process, low investment and low running cost, realizes cyclic utilization of the desulfurization waste water and zero discharge of the desulfurization waste water, and can be widely applied to desulfurization waste water treatment of flue gas desulfurization systems in station boilers and industrial boilers.
Description
Technical field
The present invention relates to a kind of low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater, can be widely applied to station boiler, industry
During the desulfurization wastewater of boiler flue gas desulfurization system is processed.
Background technology
Serosity in flue gas desulfurization, in continuous cyclic process, can be enriched with cl- and heavy metal ion, one side acceleration equipment
Corrosion, on the other hand affect the quality of Gypsum Fibrosum.Therefore, flue gas desulphurization system will discharge a certain amount of desulfurization slurry, to reduce
Cl- and concentration of heavy metal ion in serosity.Desulfurization slurry after the process of Gypsum Fibrosum cyclone, separate from serosity by Gypsum Fibrosum,
Remaining waste water is desulfurization wastewater, containing heavy metal ion, substantial amounts of solid suspension and high concentration in desulfurization wastewater
Dissolubility salt is it is necessary to could discharge after treatment or reuse.
At present, three commonly used header desulfuration waste water treatment process it is impossible to remove desulfurization wastewater middle and high concentration chlorine from
Son, therefore this technique can not meet the requirement of desulfurization wastewater zero-emission.
Content of the invention
It is an object of the invention to provide a kind of process is simple, investment is low, operating cost is low, desulfurization wastewater recycles,
Realize the low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of desulfurization wastewater zero-emission.
In order to achieve the above object, low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, comprising:
(1) store
The desulfurization wastewater that desulfurizing tower interruption is discharged is stored in hermetic container；
(2) clarifying treatment
After hermetic container reaches certain storage capacity, desulfurization wastewater enters depositing reservoir, carries out clarifying treatment, shape by mixer.
Become the desulfurization wastewater supernatant and bottom sediment, the desulfurization wastewater supernatant carries out overflow process, and bottom sediment enters dirt
Mud treatment system；
(3) overflow is processed
The desulfurization wastewater supernatant in depositing reservoir is processed from overflow to run-off；
(4) evaporation process
(4.1) desulfurization wastewater that will flow out from run-off, using circulating pump by desulfurization wastewater continuous drawing to evaporating column top, with
Desulfurization wastewater relies on free gravity to drop back into bottom afterwards；
(4.2) utilize heater, desulfurization wastewater is heated to 40 DEG C ~ 100 DEG C temperature；
(4.3) utilize atomizing sprayer, the desulfurization wastewater after heating is carried out continuously atomizing spray in evaporating column, and desulfurization is given up
Water uniform atomizing；
(4.4) meanwhile, ambient air is constantly extracted by supply air system and be passed through evaporating column；
(4.5) air and the desulfurization wastewater after atomizing spray reverse flow uniformly mixing in evaporating column, desulfurization wastewater evaporates
And carried by air, air reaches saturation at a temperature of this；
(4.6) after running a period of time, evaporation tower bottom can concentrate generation crystallization, solid sediment, enters at sludge treating system
Reason；
(5) demisting is processed
Using high-efficiency demisting apparatus, remove the big particle diameter drop that saturated moist air carries；
(6) final process
Clean saturated moist air flows into desulfurizing tower.
Low temperature spraying and sprinkling evaporation desulfurization wastewater treatment system of the present invention, its operation principle is: it is airtight that desulfurization wastewater passes through water storage
Container enters depositing reservoir, and from overflow to overflow pond, the desulfurization wastewater that will flow out from run-off, using following for the depositing reservoir supernatant
Desulfurization wastewater reverse flow in evaporating column by desulfurization wastewater continuous drawing to evaporating column top, after air and atomizing spray for the ring pump
Move and uniformly mix, desulfurization wastewater evaporates and simultaneously carried by air, and air reaches saturation at a temperature of this.Desulfurization wastewater is through spray
Device back flows back into evaporation tower bottom, forms desulfurization wastewater blood circulation, desulfurization wastewater recycles, and realizes desulfurization wastewater zero-emission
Put.
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, its operation principle is: the desulfurization wastewater after heating is steaming
Send out tower top and carry out atomizing spray, the reverse uniform contact of desulfurization wastewater after the bottom-up flowing of air, with atomization；The sky being passed through
Gas reaches the saturation under uniform temperature, and the desulfurization wastewater carrying evaporation enters the high efficiency demister of evaporating column afterbody, air
In big particle diameter drop be removed after, crystallization saturated moist air subsequently enter desulfurizing tower, desulfurization wastewater recycles, and realizes desulfurization
Wastewater zero discharge.
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, after continuous work a period of time, depositing reservoir and evaporating column
Bottom can concentrate generation crystallization, solid sediment, is periodically delivered to sludge treating system.
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, the experiment proved that, compared with traditional treatment method, technique
Simply, investment is low, and operating cost is low.
In sum, low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, process is simple, invest low, operating cost
Low, desulfurization wastewater recycles, and realizes desulfurization wastewater zero-emission.
Brief description
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Fig. 1 is the process chart of the present invention.
Specific embodiment
Embodiment 1:
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, comprising:
(1) store
The desulfurization wastewater that desulfurizing tower interruption is discharged is stored in hermetic container；
(2) clarifying treatment
After hermetic container reaches certain storage capacity, desulfurization wastewater enters depositing reservoir, carries out clarifying treatment, shape by mixer.
Become the desulfurization wastewater supernatant and bottom sediment, the desulfurization wastewater supernatant carries out overflow process, and bottom sediment enters dirt
Mud treatment system；
(3) overflow is processed
The desulfurization wastewater supernatant in depositing reservoir is processed from overflow to run-off；
(4) evaporation process
(4.1) desulfurization wastewater that will flow out from run-off, using circulating pump by desulfurization wastewater continuous drawing to evaporating column top, with
Desulfurization wastewater relies on free gravity to drop back into bottom afterwards；
(4.2) utilize heater, desulfurization wastewater is heated to 40 DEG C of temperature；
(4.3) utilize atomizing sprayer, the desulfurization wastewater after heating is carried out continuously atomizing spray in evaporating column, and desulfurization is given up
Water uniform atomizing；
(4.4) meanwhile, ambient air is constantly extracted by supply air system and be passed through evaporating column；
(4.5) air and the desulfurization wastewater after atomizing spray reverse flow uniformly mixing in evaporating column, desulfurization wastewater evaporates
And carried by air, air reaches saturation at a temperature of this；
(4.6) after running a period of time, evaporation tower bottom can concentrate generation crystallization, solid sediment, enters at sludge treating system
Reason；
(5) demisting is processed
Using high-efficiency demisting apparatus, remove the big particle diameter drop that saturated moist air carries；
(6) final process
Clean saturated moist air flows into desulfurizing tower.
Embodiment 2:
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, comprising:
The desulfurization wastewater that desulfurizing tower interruption is discharged is stored in hermetic container；
(2) clarifying treatment
After hermetic container reaches certain storage capacity, desulfurization wastewater enters depositing reservoir, carries out clarifying treatment, shape by mixer.
Become the desulfurization wastewater supernatant and bottom sediment, the desulfurization wastewater supernatant carries out overflow process, and bottom sediment enters dirt
Mud treatment system；
(3) overflow is processed
The desulfurization wastewater supernatant in depositing reservoir is processed from overflow to run-off；
(4) evaporation process
(4.1) desulfurization wastewater that will flow out from run-off, using circulating pump by desulfurization wastewater continuous drawing to evaporating column top, with
Desulfurization wastewater relies on free gravity to drop back into bottom afterwards；
(4.2) utilize heater, desulfurization wastewater is heated to 100 DEG C of temperature；
(4.3) utilize atomizing sprayer, the desulfurization wastewater after heating is carried out continuously atomizing spray in evaporating column, and desulfurization is given up
Water uniform atomizing；
(4.4) meanwhile, ambient air is constantly extracted by supply air system and be passed through evaporating column；
(4.5) air and the desulfurization wastewater after atomizing spray reverse flow uniformly mixing in evaporating column, desulfurization wastewater evaporates
And carried by air, air reaches saturation at a temperature of this；
(4.6) after running a period of time, evaporation tower bottom can concentrate generation crystallization, solid sediment, enters at sludge treating system
Reason；
(5) demisting is processed
Using high-efficiency demisting apparatus, remove the big particle diameter drop that saturated moist air carries；
(6) final process
Clean saturated moist air flows into desulfurizing tower.
Embodiment 3:
Low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater of the present invention, comprising:
(1) store
The desulfurization wastewater that desulfurizing tower interruption is discharged is stored in hermetic container；
(2) clarifying treatment
After hermetic container reaches certain storage capacity, desulfurization wastewater enters depositing reservoir, carries out clarifying treatment, shape by mixer.
Become the desulfurization wastewater supernatant and bottom sediment, the desulfurization wastewater supernatant carries out overflow process, and bottom sediment enters dirt
Mud treatment system；
(3) overflow is processed
The desulfurization wastewater supernatant in depositing reservoir is processed from overflow to run-off；
(4) evaporation process
(4.1) desulfurization wastewater that will flow out from run-off, using circulating pump by desulfurization wastewater continuous drawing to evaporating column top, with
Desulfurization wastewater relies on free gravity to drop back into bottom afterwards；
(4.2) utilize heater, desulfurization wastewater is heated to 70 DEG C of temperature；
(4.3) utilize atomizing sprayer, the desulfurization wastewater after heating is carried out continuously atomizing spray in evaporating column, and desulfurization is given up
Water uniform atomizing；
(4.4) meanwhile, ambient air is constantly extracted by supply air system and be passed through evaporating column；
(4.5) air and the desulfurization wastewater after atomizing spray reverse flow uniformly mixing in evaporating column, desulfurization wastewater evaporates
And carried by air, air reaches saturation at a temperature of this；
(4.6) after running a period of time, evaporation tower bottom can concentrate generation crystallization, solid sediment, enters at sludge treating system
Reason；
(5) demisting is processed
Using high-efficiency demisting apparatus, remove the big particle diameter drop that saturated moist air carries；
(6) final process
Clean saturated moist air flows into desulfurizing tower.
Claims (1)
1. a kind of low temperature spraying and sprinkling evaporation method for treating desulfurized wastewater is it is characterised in that include:
(1) store
The desulfurization wastewater that desulfurizing tower interruption is discharged is stored in hermetic container；
(2) clarifying treatment
After hermetic container reaches certain storage capacity, desulfurization wastewater enters depositing reservoir, carries out clarifying treatment, shape by mixer.
Become the desulfurization wastewater supernatant and bottom sediment, the desulfurization wastewater supernatant carries out overflow process, and bottom sediment enters dirt
Mud treatment system；
(3) overflow is processed
The desulfurization wastewater supernatant in depositing reservoir is processed from overflow to run-off；
(4) evaporation process
(4.1) desulfurization wastewater that will flow out from run-off, using circulating pump by desulfurization wastewater continuous drawing to evaporating column top, with
Desulfurization wastewater relies on free gravity to drop back into bottom afterwards；
(4.2) utilize heater, desulfurization wastewater is heated to 40 DEG C ~ 100 DEG C temperature；
(4.3) utilize atomizing sprayer, the desulfurization wastewater after heating is carried out continuously atomizing spray in evaporating column, and desulfurization is given up
Water uniform atomizing；
(4.4) meanwhile, ambient air is constantly extracted by supply air system and be passed through evaporating column；
(4.5) air and the desulfurization wastewater after atomizing spray reverse flow uniformly mixing in evaporating column, desulfurization wastewater evaporates
And carried by air, air reaches saturation at a temperature of this；
(4.6) after running a period of time, evaporation tower bottom can concentrate generation crystallization, solid sediment, enters at sludge treating system
Reason；
(5) demisting is processed
Using high-efficiency demisting apparatus, remove the big particle diameter drop that saturated moist air carries；
(6) final process
Clean saturated moist air flows into desulfurizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611004482.3A CN106365232A (en) | 2016-11-15 | 2016-11-15 | Low-temperature sprinkling and evaporation treatment method for desulfurization waste water |
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| CN201611004482.3A CN106365232A (en) | 2016-11-15 | 2016-11-15 | Low-temperature sprinkling and evaporation treatment method for desulfurization waste water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108144429A (en) * | 2018-01-03 | 2018-06-12 | 中国华电科工集团有限公司 | A kind of system and method for preventing dry nozzle fouling |
| CN109395568A (en) * | 2018-12-17 | 2019-03-01 | 新疆天富集团有限责任公司 | A kind of low water consumption wet desulphurization method |
| CN110577313A (en) * | 2019-10-11 | 2019-12-17 | 国电科学技术研究院有限公司 | desulfurization wastewater zero-discharge treatment system and method |
| CN113184932A (en) * | 2021-04-26 | 2021-07-30 | 武汉天空蓝环保科技有限公司 | Utilize flue gas evaporative concentration device and desulfurization effluent disposal system |
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Application publication date: 20170201 |