CN106830440A - A kind of thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system and method - Google Patents
A kind of thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system and method Download PDFInfo
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- CN106830440A CN106830440A CN201710170727.8A CN201710170727A CN106830440A CN 106830440 A CN106830440 A CN 106830440A CN 201710170727 A CN201710170727 A CN 201710170727A CN 106830440 A CN106830440 A CN 106830440A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 74
- 239000012528 membrane Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000004062 sedimentation Methods 0.000 claims abstract description 26
- 238000001471 micro-filtration Methods 0.000 claims abstract description 25
- 239000003814 drug Substances 0.000 claims abstract description 24
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 24
- 238000000151 deposition Methods 0.000 claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000000126 substance Substances 0.000 claims description 25
- 239000010802 sludge Substances 0.000 claims description 21
- 238000001556 precipitation Methods 0.000 claims description 15
- 239000005416 organic matter Substances 0.000 claims description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 150000002500 ions Chemical class 0.000 claims description 12
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 6
- 230000008025 crystallization Effects 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 238000005276 aerator Methods 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000006477 desulfuration reaction Methods 0.000 description 10
- 230000023556 desulfurization Effects 0.000 description 10
- 208000028659 discharge Diseases 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000005352 clarification Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000036642 wellbeing Effects 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
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
-
- 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
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
Landscapes
- 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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system and method, including the header outlet conduit of power plant three, preliminary sedimentation tank, the first medicine system, #1 aerated reactions pond, #1 depositing reservoirs, the second medicine system, #1 reaction tanks, microfiltration systems and disc tube reverse osmosis (dt-ro) system；The outlet of the header outlet conduit of power plant three is connected with the entrance of preliminary sedimentation tank, the outlet of preliminary sedimentation tank and the outlet of the first medicine system are connected with the entrance in #1 aerated reactions pond, the delivery port in #1 aerated reactions pond is connected with the water inlet of #1 depositing reservoirs, the outlet of the delivery port of #1 depositing reservoirs and the second medicine system is connected with the entrance of #1 reaction tanks, the delivery port of #1 reaction tanks is connected through microfiltration systems with the entrance of disc tube reverse osmosis (dt-ro) system, the system and method concentrated effect is good, and after not resulting in film blocking and robbing, maintenance cost is low.
Description
Technical field
The invention belongs to energy-conserving and environment-protective field, it is related to a kind of thermal power plant's high-salt wastewater processing system and method, and in particular to
A kind of thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system and method.
Background technology
In recent years, it is increasingly strict with national environmental standard and policy, some developed areas or ecological sensitive areas
Domain has required high salinity wastewater zero discharge.In this context, increasing coal-burning power plant carries end high salt water zero discharge
Upper agenda, wherein main is desulfurization wastewater.
Desulfurization wastewater produced by heat-engine plant wet flue gas desulfurization has complicated pollutant component, organic matter and ammonia-nitrogen content
It is high, the features such as variation water quality scope is big, at present except there is a small number of power plant can be by desulfurization wastewater by being back to hydraulic flushing ash or grey field
Sprinkling, slag removing system and realize outside zero-emission, most of power plant still cannot reuse.As can be seen here, to realize power plant end
Wastewater zero discharge, it is necessary to administered to desulfurization wastewater.
Major part power plant carries out zero discharge treatment, but evaporative crystallization work by the way of evaporative crystallization to desulfurization wastewater at present
Process system is complicated, and equipment investment and operating cost are high, so as to limit its promoting the use in desulfurization wastewater zero-emission field.
Moreover, the crystal salt of its final output is the salt-mixture without value, can only be used as solid waste landfill disposal, and this is not only
Economic benefit can not be brought, and needs substantial amounts of solidification disposal of waste expense and place.To sum up, for ensure Zero discharging system it is normal
Run and reduce processing cost as far as possible, it is necessary to pay much attention to pretreatment and the concentration decrement of desulfurization wastewater.
From the point of view of the situation of current investigation, existing part power plant is entered using traditional coiled seawater reverse osmosis membrane to desulfurization wastewater
Row concentration, but organic matter and ammonia-nitrogen content are higher in desulfurization wastewater, its concentrated effect are constrained to a certain extent, and transport for a long time
Guild causes the blocking and fouling of film, generally requires constantly to change and safeguards membrane component, and operation expense is very high.
The content of the invention
A kind of shortcoming it is an object of the invention to overcome above-mentioned prior art, there is provided thermal power plant's high-salt wastewater dish tubular type
Film concentrating and treating system and method, the system and method concentrated effect are good, and do not result in film block and rob after, maintenance cost
It is low.
To reach above-mentioned purpose, thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system of the present invention includes power plant
Three header outlet conduits, preliminary sedimentation tank, the first medicine system, #1 aerated reactions pond, #1 depositing reservoirs, the second medicine system, #1 reactions
Pond, microfiltration systems and disc tube reverse osmosis (dt-ro) system；
The outlet of the header outlet conduit of power plant three is connected with the entrance of preliminary sedimentation tank, the outlet of preliminary sedimentation tank and the first dosing system
The outlet of system is connected with the entrance in #1 aerated reactions pond, and the delivery port in #1 aerated reactions pond is connected with the water inlet of #1 depositing reservoirs
Logical, the outlet of the delivery port of #1 depositing reservoirs and the second medicine system is connected with the entrance of #1 reaction tanks, the water outlet of #1 reaction tanks
Mouth is connected through microfiltration systems with the entrance of disc tube reverse osmosis (dt-ro) system.
First medicine system includes NaClO chemicals dosing plants.
Second medicine system includes NaOH chemicals dosing plants and Na2CO3Chemicals dosing plant, the outlet of NaOH chemicals dosing plants and
Na2CO3The outlet of chemicals dosing plant is connected with the entrance of #1 reaction tanks.
Also include that crystallizing evaporator and DTRO produce water reclamation system, wherein, the concentrated water outlet of disc tube reverse osmosis (dt-ro) system with
The entrance of crystallizing evaporator is connected, and the entrance that the product water of disc tube reverse osmosis (dt-ro) system produces water reclamation system with DTRO is connected.
Also include sludge filter press, the base sludge outlet of preliminary sedimentation tank, the base sludge outlet of #1 depositing reservoirs and micro-filtration system
The sludge outlet of system is connected by the entrance of pipeline and Guan Houyu sludge filter press, the filtrate (liquid and preliminary sedimentation of sludge filter press
The entrance in pond is connected.
The bottom in #1 aerated reactions pond is provided with agitator and aerator.
Thermal power plant's high-salt wastewater dish tubular membrane concentration method of the present invention is comprised the following steps：
1) thermal power plant's high-salt wastewater of the header outlet conduit of power plant three output is entered into preliminary sedimentation tank, after being precipitated through preliminary sedimentation tank
Thermal power plant's high-salt wastewater enter into #1 aerated reactions pond, while the NaClO of the first medicine system output to enter into #1 aerations anti-
Ying Chi, organic matter and ammonia nitrogen in the #1 aerated reactions pond in aeration and NaClO and thermal power plant high-salt wastewater fully react, and make fire
Organic matter and ammonium oxidation removal in power plant's high-salt wastewater, then enters into #1 reaction tanks after #1 depositing reservoirs clarification precipitation again
In；
2)Na2CO3The Na of chemicals dosing plant output2CO3And the NaOH of NaOH chemicals dosing plants output is entered into #1 reaction tanks,
And with thermal power plant high-salt wastewater in Ca2+Ion and Mg2+Ion is reacted, and generates CaCO3Precipitation and Mg (OH)2Precipitation, from
And remove the Ca in thermal power plant's high-salt wastewater2+Ion and Mg2+Ion, thermal power plant's high-salt wastewater of #1 reaction tanks output is entered into
In microfiltration systems, the CaCO in removing thermal power plant's high-salt wastewater in microfiltration systems3Precipitation and Mg (OH)2Precipitation, microfiltration systems are defeated
The thermal power plant's high-salt wastewater for going out is entered into disc tube reverse osmosis (dt-ro) system, and it is high that thermal power plant is removed in disc tube reverse osmosis (dt-ro) system
NaCl in salt waste water, completes the dish tubular membrane concentration of thermal power plant's high-salt wastewater.
The invention has the advantages that：
Thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system of the present invention and method are used in concrete operations
Traditional softening method carries out sofening treatment with the handling process that microfiltration systems are combined to thermal power plant's high-salt wastewater, not only makes water outlet
Water quality more preferably, and substitutes traditional dosing, flocks and precipitate and separate by microfiltration systems, reduces cost and the occupation of land of water process
Area, while in treatment, by add organic matter in sodium hypochlorite and aeration Combined Treatment thermal power plant high-salt wastewater and
Ammonia nitrogen, so that the organic matter and ammonia nitrogen in thermal power plant's high-salt wastewater are thoroughly removed, film is blocked when reducing subsequent concentration
And the risk of fouling, it is ensured that disc tube reverse osmosis (dt-ro) system run all right, concentrated effect is significantly lifted.In addition, of the invention
Abandoning tradition rolling sea-water reverse osmose uses disc tube reverse osmosis (dt-ro) system, wherein, runner panel surface in disc tube reverse osmosis (dt-ro) system
Salient point with certain way arrangement, can make water that turbulent flow is formed during flowing, can be prevented effectively from film and block and concentration difference
Polarization phenomena, further improve membranous system to entering organic matter of water and the tolerance degree of ammonia-nitrogen content, reduce the wind of organic fouling
Danger.
Further, the present invention is processed sludge by sludge filter press, while the output of disc tube reverse osmosis (dt-ro) system
Produce water and concentrated water is reclaimed respectively, zero-emission is truly realized, while the technical grade NaCl of evaporative crystallization can be used as chemical industry for making chlorine and alkali
The chemical raw material of industry, to obtain economic well-being of workers and staff.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Wherein, 1 be the header outlet conduit of power plant three, 2 be preliminary sedimentation tank, 3 be #1 aerated reactions pond, 4 be crystallizing evaporator, 5
For sludge filter press, 6 be #1 reaction tanks, 7 be NaOH chemicals dosing plants, 8 be NaClO chemicals dosing plants, 9 be #1 depositing reservoirs, 10 be dish
Tubular type counter-infiltration system, 11 are Na2CO3Chemicals dosing plant, 12 are microfiltration systems.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to Fig. 1, thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system of the present invention includes the header of power plant three
Outlet conduit 1, preliminary sedimentation tank 2, the first medicine system, #1 aerated reactions pond 3, #1 depositing reservoirs 9, the second medicine system, #1 reaction tanks
6th, microfiltration systems 12 and disc tube reverse osmosis (dt-ro) system 10；The outlet of the header outlet conduit 1 of power plant three is connected with the entrance of preliminary sedimentation tank 2
Logical, the outlet of preliminary sedimentation tank 2 and the outlet of the first medicine system are connected with the entrance in #1 aerated reactions pond 3, #1 aerated reactions pond 3
Delivery port be connected with the water inlet of #1 depositing reservoirs 9, the outlet of the delivery port of #1 depositing reservoirs 9 and the second medicine system is anti-with #1
The entrance in pond 6 is answered to be connected, the delivery port of #1 reaction tanks 6 is connected through microfiltration systems 12 with the entrance of disc tube reverse osmosis (dt-ro) system 10
It is logical.
First medicine system includes NaClO chemicals dosing plants 8；Second medicine system include NaOH chemicals dosing plants 7 and
Na2CO3Chemicals dosing plant 11, the outlet of NaOH chemicals dosing plants 7 and Na2CO3The outlet of chemicals dosing plant 11 and the entrance of #1 reaction tanks 6
It is connected.
Produce water reclamation system present invention additionally comprises crystallizing evaporator 4 and DTRO, wherein, disc tube reverse osmosis (dt-ro) system 10 it is dense
Water out is connected with the entrance of crystallizing evaporator 4, and the water that produces of disc tube reverse osmosis (dt-ro) system 10 produces water reclamation system with DTRO
Entrance is connected；Present invention additionally comprises sludge filter press 5, the base sludge outlet of preliminary sedimentation tank 2, the base sludge of #1 depositing reservoirs 9
The sludge outlet of outlet and microfiltration systems 12 is connected by the entrance of pipeline and Guan Houyu sludge filter press 5, sludge filter press 5
Filtrate (liquid be connected with the entrance of preliminary sedimentation tank 2；The bottom in #1 aerated reactions pond 3 is provided with agitator and aerator.
Thermal power plant's high-salt wastewater dish tubular membrane concentration method of the present invention is comprised the following steps：
1) thermal power plant's high-salt wastewater of the output of three header outlet conduit of power plant 1 enters into preliminary sedimentation tank 2, is precipitated through preliminary sedimentation tank 2
Thermal power plant's high-salt wastewater afterwards enters into #1 aerated reactions pond 3, while the NaClO of the first medicine system output enters into #1 aerations
Reaction tank 3, organic matter and ammonia nitrogen in the #1 aerated reactions pond 3 in aeration and NaClO and thermal power plant high-salt wastewater fully react,
Organic matter and ammonium oxidation in thermal power plant's high-salt wastewater are removed, then #1 is entered into after the clarification precipitation of #1 depositing reservoirs 9 again
In reaction tank 6；
2)Na2CO3The Na of the output of chemicals dosing plant 112CO3And the NaOH of the output of NaOH chemicals dosing plants 7 enters into #1 reaction tanks 6
In, and with thermal power plant high-salt wastewater in Ca2+Ion and Mg2+Ion is reacted, and generates CaCO3Precipitation and Mg (OH)2Precipitation,
So as to remove the Ca in thermal power plant's high-salt wastewater2+Ion and Mg2+Ion, thermal power plant's high-salt wastewater of the output of #1 reaction tanks 6 enters
To in microfiltration systems 12, to the CaCO in thermal power plant's high-salt wastewater in microfiltration systems 123Precipitation and Mg (OH)2Precipitation is gone
Remove, thermal power plant's high-salt wastewater of the output of microfiltration systems 12 enters into disc tube reverse osmosis (dt-ro) system 10, and in disc tube reverse osmosis (dt-ro) system
The NaCl in thermal power plant's high-salt wastewater is removed in system 10, the dish tubular membrane concentration of thermal power plant's high-salt wastewater is completed.
Wherein, the bulky grain that a large amount of suspensions, part in removing thermal power plant's high-salt wastewater in sedimentation basin are easily settled
Thing and a small amount of organic matter, are stirred by agitating device to the water in #1 aerated reactions pond 3, make aeration and NaClO with fire
Power plant's high-salt wastewater is fully contacted reaction.
Thermal power plant's high-salt wastewater of the output of microfiltration systems 12 is the waste water based on NaCl, and thermal power plant's high-salt wastewater is through dish
Tubular type counter-infiltration system 10 is concentrated, generation 80% fresh water enter into DTRO produce water reclamation system in, the 20% of generation
Concentrate enter into crystallizing evaporator 4 and carry out curing process.
It should be noted that economic benefit of the present invention is substantially, it is high to thermal power plant using sodium hypochlorite-aeration and tubular type micro-filtration
Salt waste water is pre-processed, and the concentration of dish tubular membrane is combined technique of zero discharge with evaporative crystallization, is reducing thermal power plant's high-salt wastewater
Also effective softening and concentration is carried out while middle organic matter and ammonia-nitrogen content to thermal power plant's high-salt wastewater.The method is avoided
Organic fouling risk of film concentration systems, then the NaCl salt of technical purity grade is obtained through point salt crystallization, and the present invention from
Dynamicization degree is high, and whole process can reach low cost, realize the effect of zero-emission without efflux wastewater.
Claims (7)
1. a kind of thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system, it is characterised in that including the header outlet pipe of power plant three
Road (1), preliminary sedimentation tank (2), the first medicine system, #1 aerated reactions pond (3), #1 depositing reservoirs (9), the second medicine system, #1 reactions
Pond (6), microfiltration systems (12) and disc tube reverse osmosis (dt-ro) system (10)；
The outlet of the header outlet conduit (1) of power plant three is connected with the entrance of preliminary sedimentation tank (2), the outlet and first of preliminary sedimentation tank (2)
Entrance of the outlet of medicine system with #1 aerated reactions pond (3) is connected, and delivery port and the #1 in #1 aerated reactions pond (3) are clarified
The water inlet in pond (9) is connected, the outlet of the delivery port and the second medicine system of #1 depositing reservoirs (9) with #1 reaction tanks (6)
Entrance is connected, and the delivery port of #1 reaction tanks (6) is connected through microfiltration systems (12) with the entrance of disc tube reverse osmosis (dt-ro) system (10)
It is logical.
2. thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system according to claim 1, it is characterised in that described
One medicine system includes NaClO chemicals dosing plants (8).
3. thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system according to claim 2, it is characterised in that described
Two medicine systems include NaOH chemicals dosing plants (7) and Na2CO3Chemicals dosing plant (11), the outlet of NaOH chemicals dosing plants (7) and
Na2CO3Entrance of the outlet of chemicals dosing plant (11) with #1 reaction tanks (6) is connected.
4. thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system according to claim 1, it is characterised in that also include
Crystallizing evaporator (4) and DTRO produce water reclamation system, wherein, the concentrated water of disc tube reverse osmosis (dt-ro) system (10) is exported and evaporative crystallization
The entrance of device (4) is connected, and the entrance that the product water of disc tube reverse osmosis (dt-ro) system (10) produces water reclamation system with DTRO is connected.
5. thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system according to claim 1, it is characterised in that also include
Sludge filter press (5), the base sludge outlet of preliminary sedimentation tank (2), the base sludge outlet of #1 depositing reservoirs (9) and microfiltration systems (12)
Sludge outlet be connected by the entrance of pipeline and Guan Houyu sludge filter press (5), the filtrate (liquid of sludge filter press (5) with
The entrance of preliminary sedimentation tank (2) is connected.
6. thermal power plant's high-salt wastewater dish tubular membrane concentrating and treating system according to claim 1, it is characterised in that #1 is aerated
The bottom of reaction tank (3) is provided with agitator and aerator.
7. a kind of thermal power plant's high-salt wastewater dish tubular membrane concentration method, it is characterised in that based on the fire described in claim 3
Power plant's high-salt wastewater dish tubular membrane concentrating and treating system, comprises the following steps：
1) thermal power plant's high-salt wastewater of the header outlet conduit (1) of power plant three output is entered into preliminary sedimentation tank (2), through preliminary sedimentation tank (2)
Thermal power plant's high-salt wastewater after precipitation is entered into #1 aerated reactions pond (3), while the NaClO of the first medicine system output enters
To #1 aerated reactions pond (3), organic matter in the #1 aerated reactions pond (3) in aeration and NaClO and thermal power plant's high-salt wastewater and
Ammonia nitrogen fully reacts, and removes organic matter and ammonium oxidation in thermal power plant's high-salt wastewater, is then clarified through #1 depositing reservoirs (9) again
Entered into after precipitation in #1 reaction tanks (6)；
2)Na2CO3The Na of chemicals dosing plant (11) output2CO3And the NaOH of NaOH chemicals dosing plants (7) output enters into #1 reaction tanks
(6) in, and with thermal power plant high-salt wastewater in Ca2+Ion and Mg2+Ion is reacted, and generates CaCO3Precipitation and Mg (OH)2It is heavy
Form sediment, so as to remove the Ca in thermal power plant's high-salt wastewater2+Ion and Mg2+Ion, thermal power plant's high salt of #1 reaction tanks (6) output is given up
Water is entered into microfiltration systems (12), the CaCO in removal thermal power plant high-salt wastewater in microfiltration systems (12)3Precipitation and Mg
(OH)2Precipitation, thermal power plant's high-salt wastewater of microfiltration systems (12) output is entered into disc tube reverse osmosis (dt-ro) system (10), and in dish
The NaCl in thermal power plant's high-salt wastewater is removed in tubular type counter-infiltration system (10), the dish tubular membrane for completing thermal power plant's high-salt wastewater is dense
Contracting is processed.
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| CN108793569A (en) * | 2018-09-13 | 2018-11-13 | 西安西热水务环保有限公司 | A kind of high ammonia nitrogen, high organic matter desulfurization wastewater dish tubular type film processing system and method |
| CN112461771A (en) * | 2020-11-15 | 2021-03-09 | 西安热工研究院有限公司 | Automatic online real-time detection device and method for total iron of water vapor system of thermal power plant |
| CN114230055A (en) * | 2021-12-24 | 2022-03-25 | 华能山东发电有限公司 | Method for reducing membrane method concentration scaling rate and flux recovery promotion of desulfurization wastewater |
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