CN105439321A - System and method for totally-enclosed type comprehensive treatment of various waste waters of thermal power plant - Google Patents
System and method for totally-enclosed type comprehensive treatment of various waste waters of thermal power plant Download PDFInfo
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- CN105439321A CN105439321A CN201510873711.4A CN201510873711A CN105439321A CN 105439321 A CN105439321 A CN 105439321A CN 201510873711 A CN201510873711 A CN 201510873711A CN 105439321 A CN105439321 A CN 105439321A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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 Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a system and method for totally-enclosed type comprehensive treatment of various waste waters of a thermal power plant. Desulfurization waste water, chemical sludge and residue mud water are premixed and then enter a slag fetching ship to undergo slag fetching treatment, overflowed residue sulfur water undergoes follow-up clarification and coagulation sedimentation and the like, and outlet water and domestic sewage treatment outlet water are discharged in a mixed mode or reused. Compared with the prior art, the system and method for totally-enclosed type comprehensive treatment of various waste waters of the thermal power plant has the advantages that the process is simple; the process is simple and convenient to modify on the basis of an existing conventional process, and the system runs substantially without the adding of workers for operation; the treatment of wastes with processes of wastes against one another is performed, the system and method save energy and are efficient, the chemical sludge and the desulfurization waste water do not need to be treated independently, and the production running cost is low; various waste waters of the thermal power plant are treated synchronously, the waste water treatment recycling quantity can be improved, and the cleaning production level of the thermal power plant is improved.
Description
Technical field
The present invention relates to the comprehensive treating process of thermal power plant's various wastewater, comprise desulfurization wastewater, clinker water, chemical sludge and sanitary sewage etc., be applicable to the water treatment field of thermal power industry and environmental protection industry (epi), particularly relate to a kind of thermal power plant various wastewater totally enclosed total system and method.
Background technology
Fuel-burning power plant produces multiple factory effluent of different nature, the process usual sub-prime shunting individual curing of waste water.Waste water treatment process is generally physico-chemical process, and individual curing difficulty and running cost are all higher, along with the requirement increasingly stringent of environment protection, explores a kind of thermoelectricity waste water comprehensive processing technique, and realizing the treatment of wastes with processes of wastes against one another and energy-saving and emission-reduction becomes a kind of needs.Current, part power plant attempts desulfurization wastewater, excessive pulp water and hydraulic(-ash) sluicing water to enter slag water treatment system combination treatment, achieves certain effect.Clean water treatment produces more chemically reactive mud in addition, its solid matter mainly flocculation agent and trapping suspended substance formed flco, direct discharge pollutes the environment, mainly adopt processed separately at present, running cost is higher, as itself and desulfurization wastewater are introduced slag water treatment system in the lump, absorption and the trapping of wherein remaining flocculation agent and other mud flco raising slag sulphur pollutant in water can be made full use of, improve the settling property of suspended substance, save medicine consumption and mud comprehensive treating process expense, there is good economic benefit and environmental benefit.Thermal power plant also produces a certain amount of sanitary sewage, and its water quality after biochemical treatment is relatively better, can reduce the chlorine ion concentration mixing clear water, can reach power plant's industrial reuse water requirement with slag sulphur water treatment water outlet after mixing.In addition, current power plant generally drag in slag ship adopt service water dilute cooling, adopt various wastewater mixing can substitute service water realize cooling object.Therefore the process program that above-mentioned various wastewater carries out comprehensive treating process is with a wide range of applications.
Summary of the invention
In view of this, the object of this invention is to provide a kind of thermal power plant various wastewater totally enclosed total system and method, to solve deficiency of the prior art.
In order to achieve the above object, the object of the invention is to be achieved through the following technical solutions:
On the one hand, a kind of thermal power plant various wastewater totally enclosed total system is provided, wherein, comprises mixing tank, drag for slag ship, slag sulphur water scratch pool, ash flushing water collecting tank, thickner, buffering settling pond, equalizing tank, first coagulation reaction tank, second coagulation reaction tank, secondary clarifier, clean water basin, sludge sump and sludge dewatering equipment, described in drag for slag gear have middle part chamber, the water level of described mixing tank higher than the described water level dragging for slag ship, the bottom of described mixing tank and the described middle part chamber dragging for slag ship, described in drag for slag ship, described slag sulphur water scratch pool, described thickner connects successively, and described thickner connects described ash flushing water collecting tank and described buffering settling pond respectively, described thickner, described mixing tank, the described slag ship that drags for connects successively, described buffering settling pond, described equalizing tank, described first coagulation reaction tank, described second coagulation reaction tank, described secondary clarifier, described clean water basin connect successively, described secondary clarifier, described sludge sump is connected successively with described sludge dewatering equipment.
Above-mentioned thermal power plant various wastewater totally enclosed total system, wherein, is provided with the first stirrer and pH meter in described first coagulation reaction tank.
Above-mentioned thermal power plant various wastewater totally enclosed total system, wherein, the second coagulation reaction tank is provided with the second stirrer.
On the other hand, a kind of method adopting above-mentioned thermal power plant various wastewater totally enclosed total system to realize is provided, wherein, comprises the following steps:
S1. mixing tank is for dragging for the preposition pretreatment unit of slag ship, and the water outlet overflow of dragging for slag ship enters slag sulphur water scratch pool, then by concentration and settlement process in pump delivery to thickner;
S2. thickner process is from the spoil disposal of the slag sulphur water of slag sulphur water scratch pool, the ash flushing water of ash flushing water collecting tank collection and buffering settling pond, the supernatant liquor of discharging enters buffering settling pond process, and the slag mud of discharge drags for the process of slag ship by pump delivery to entering after mixing tank mixes with desulfurization wastewater and chemical sludge;
S3. cushion settling pond part effluent reuse and make ash flushing water, part gravity flow enters equalizing tank to treat subsequent disposal, the mud of discharge by pump delivery to thickner process;
S4. in the first coagulation reaction tank, feeding lime regulates waste water ph, and add flocculation agent, add heavy metal chelating agent when heavy metals exceeds standard, dosage is determined depending on waste water quality situation;
S5. in the second coagulation reaction tank, throw coagulant aids, dosage is determined depending on waste water quality situation and follow-up clarification and effluent effect;
S6. in clean water basin, collect secondary clarifier water outlet and sanitary wastewater process water outlet, and add salt acid for adjusting pH depending on water quality situation, add disinfection by chlorine dioxide and decolouring.
Compared with the prior art, beneficial effect of the present invention is:
1) technique is simple, existing common process basis is transformed simple and convenient, and it runs does not need to increase human users substantially;
2) treatment of wastes with processes of wastes against one another, efficient energy-saving, without individual curing chemical sludge and desulfurization wastewater, reduces production run cost low;
3) synchronous processing power plant various wastewater, can improve wastewater treatment and renovation amount, improves thermal power plant's level of clean production.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of thermal power plant of the present invention various wastewater totally enclosed total system;
Fig. 2 shows the schematic flow sheet of thermal power plant of the present invention various wastewater totally enclosed integrated conduct method;
Wherein: 1-mixing pond 2-drags for slag ship 3-slag sulphur water scratch pool 4-ash flushing water collecting tank 5-thickner 6-and cushions settling pond 7-equalizing tank 8-first coagulation reaction tank 9-second coagulation reaction tank 210-secondary clarifier 11-clean water basin 12-sludge sump 13-sludge dewatering equipment
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
The present invention enters after being pre-mixed by desulfurization wastewater, chemical sludge, slag muddy water to drag for slag ship and drag for Slag treatment again, the slag sulphur water of overflow afterwards through process such as follow-up clarification and coagulating sedimentation, water outlet and sanitary sewage disposal water outlet dual disposal or reuse.Specifically, shown in figure 1, thermal power plant of the present invention various wastewater totally enclosed total system comprises mixing tank 1, drag for slag ship 2, slag sulphur water scratch pool 3, ash flushing water collecting tank 4, thickner 5, buffering settling pond 6, equalizing tank 7, first coagulation reaction tank 8, second coagulation reaction tank 9, secondary clarifier 10, clean water basin 11, sludge sump 12 and sludge dewatering equipment 13, drag for slag ship 2 and there is middle part chamber, the water level of mixing tank 1 is higher than the water level dragging for slag ship 2, bottom and the middle part chamber dragging for slag ship 2 of mixing tank 1, drag for slag ship 2, slag sulphur water scratch pool 3, thickner 5 connects successively, thickner 5 connects ash flushing water collecting tank 4 and buffering settling pond 6 respectively, thickner 5, mixing tank 1, drag for slag ship 2 to connect successively, buffering settling pond 6, equalizing tank 7, first coagulation reaction tank 8, second coagulation reaction tank 9, secondary clarifier 10, clean water basin 11 connect successively, secondary clarifier 10, sludge sump 12 is connected successively with sludge dewatering equipment 13.
In a preferred embodiment of the invention, be provided with the first stirrer and pH meter in the first coagulation reaction tank 8, the second coagulation reaction tank 9 is provided with the second stirrer.
Continue referring to shown in Fig. 2, the method that thermal power plant of the present invention various wastewater totally enclosed total system realizes comprises the following steps:
Mixing tank 1 is for dragging for the preposition pretreatment unit of slag ship, and the water outlet overflow of dragging for slag ship 2 enters slag sulphur water scratch pool 3, then by concentration and settlement process in pump delivery to thickner 5;
Thickner 5 processes the spoil disposal from the slag sulphur water of slag sulphur water scratch pool 3, the ash flushing water of ash flushing water collecting tank 4 collection and buffering settling pond 6, the supernatant liquor of discharging enters buffering settling pond 6 and processes, and the slag mud of discharge is dragged for slag ship 2 by pump delivery process to entering after mixing tank 1 mixes with desulfurization wastewater and chemical sludge;
The a part of effluent reuse of buffering settling pond 6 makes ash flushing water, and part gravity flow enters equalizing tank 7 to treat subsequent disposal, and the mud of discharge is processed to thickner 5 by pump delivery;
In the first coagulation reaction tank 8, feeding lime regulates waste water ph, and add flocculation agent, add heavy metal chelating agent when heavy metals exceeds standard, dosage is determined depending on waste water quality situation;
In the second coagulation reaction tank 9, throw coagulant aids, dosage is determined depending on waste water quality situation and follow-up clarification and effluent effect;
In clean water basin 11, collect secondary clarifier 10 water outlet and sanitary wastewater process water outlet, and add salt acid for adjusting pH depending on water quality situation, add disinfection by chlorine dioxide and decolouring.
As can be seen from above-described embodiment, advantage of the present invention is:
1) technique is simple, existing common process basis is transformed simple and convenient, and it runs does not need to increase human users substantially;
2) treatment of wastes with processes of wastes against one another, efficient energy-saving, without individual curing chemical sludge and desulfurization wastewater, reduces production run cost low;
3) synchronous processing power plant various wastewater, can improve wastewater treatment and renovation amount, improves thermal power plant's level of clean production.
Be described in detail specific embodiments of the invention above, but the present invention is not restricted to specific embodiment described above, it is just as example.To those skilled in the art, any equivalent modifications and substitute also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (4)
1. thermal power plant's various wastewater totally enclosed total system, is characterized in that, comprises mixing tank (1), drag for slag ship (2), slag sulphur water scratch pool (3), ash flushing water collecting tank (4), thickner (5), buffering settling pond (6), equalizing tank (7), first coagulation reaction tank (8), second coagulation reaction tank (9), secondary clarifier (10), clean water basin (11), sludge sump (12) and sludge dewatering equipment (13), the described slag ship (2) that drags for has middle part chamber, the water level of described mixing tank (1) is higher than the described water level dragging for slag ship (2), the bottom of described mixing tank (1) and the described middle part chamber dragging for slag ship (2), described in drag for slag ship (2), described slag sulphur water scratch pool (3), described thickner (5) connects successively, and described thickner (5) connects described ash flushing water collecting tank (4) and described buffering settling pond (6) respectively, described thickner (5), described mixing tank (1), the described slag ship (2) that drags for connects successively, described buffering settling pond (6), described equalizing tank (7), described first coagulation reaction tank (8), described second coagulation reaction tank (9), described secondary clarifier (10), described clean water basin (11) connect successively, described secondary clarifier (10), described sludge sump (12) is connected successively with described sludge dewatering equipment (13).
2. thermal power plant's various wastewater totally enclosed total system as claimed in claim 1, is characterized in that, be provided with the first stirrer and pH meter in described first coagulation reaction tank (8).
3. thermal power plant's various wastewater totally enclosed total system as claimed in claim 2, it is characterized in that, the second coagulation reaction tank (9) is provided with the second stirrer.
4. the method adopting thermal power plant's various wastewater totally enclosed total system described in claim 3 to realize, is characterized in that, comprise the following steps:
Mixing tank (1) is for dragging for the preposition pretreatment unit of slag ship, and the water outlet overflow of dragging for slag ship (2) enters slag sulphur water scratch pool (3), then by concentration and settlement process in pump delivery to thickner (5);
The spoil disposal of the ash flushing water that thickner (5) process is collected from the slag sulphur water of slag sulphur water scratch pool (3), ash flushing water collecting tank (4) and buffering settling pond (6), the supernatant liquor of discharging enters buffering settling pond (6) process, and the slag mud of discharge is dragged for slag ship (2) by pump delivery process to entering after mixing tank (1) mixes with desulfurization wastewater and chemical sludge;
Buffering settling pond (6) a part of effluent reuse makes ash flushing water, and part gravity flow enters equalizing tank (7) to treat subsequent disposal, and the mud of discharge is processed to thickner (5) by pump delivery;
In the first coagulation reaction tank (8), feeding lime regulates waste water ph, and add flocculation agent, add heavy metal chelating agent when heavy metals exceeds standard, dosage is determined depending on waste water quality situation;
In the second coagulation reaction tank (9), throw coagulant aids, dosage is determined depending on waste water quality situation and follow-up clarification and effluent effect;
In clean water basin (11), collect secondary clarifier (10) water outlet and sanitary wastewater process water outlet, and add salt acid for adjusting pH depending on water quality situation, add disinfection by chlorine dioxide and decolouring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510873711.4A CN105439321A (en) | 2015-12-02 | 2015-12-02 | System and method for totally-enclosed type comprehensive treatment of various waste waters of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510873711.4A CN105439321A (en) | 2015-12-02 | 2015-12-02 | System and method for totally-enclosed type comprehensive treatment of various waste waters of thermal power plant |
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| CN105439321A true CN105439321A (en) | 2016-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107089690A (en) * | 2017-06-06 | 2017-08-25 | 大唐贵州发耳发电有限公司 | A kind of desulfurization wastewater recycle device |
| CN111606446A (en) * | 2019-02-22 | 2020-09-01 | 湖南华电长沙发电有限公司 | Process capable of treating various waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107089690A (en) * | 2017-06-06 | 2017-08-25 | 大唐贵州发耳发电有限公司 | A kind of desulfurization wastewater recycle device |
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