CN210505887U - Thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source - Google Patents
Thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source Download PDFInfo
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- CN210505887U CN210505887U CN201920688864.5U CN201920688864U CN210505887U CN 210505887 U CN210505887 U CN 210505887U CN 201920688864 U CN201920688864 U CN 201920688864U CN 210505887 U CN210505887 U CN 210505887U
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Abstract
The utility model discloses a thermal power plant's circulating water blowdown water deep treatment system at municipal reclaimed water source, including circulating water blowdown water equalizing basin, sulphuric acid charge device, iron carbon internal electrolysis system, oxidation reaction system, middle pond, charge system, coagulating sedimentation pond, clean water basin, high efficiency fiber filter, filtration water tank, electric adsorption equipment, product water tank and dense water tank. The utility model discloses can effectively reduce difficult degradation organic matter in municipal reclaimed water source circulating water blowdown water, have characteristics such as treatment effect is stable, the working costs is low, the water yield of system is high.
Description
Technical Field
The utility model belongs to the technical field of thermal power plant's waste water advanced treatment and retrieval and utilization technique and specifically relates to a thermal power plant's circulating water blowdown deep treatment system at municipal reclaimed water source is related to.
Background
The circulating water sewage is used as the water of the circulating cooling water system of the thermal power plant, and the water quality of the circulating water sewage has the characteristics of high suspended matter, high salt content, high hardness, high alkalinity and the like. The treatment process of the circulating water and sewage of the thermal power plant, which is currently implemented in China, mainly comprises the following steps: coagulation clarification + filtration, pretreatment + reverse osmosis, pretreatment + ultrafiltration + reverse osmosis and the like, such as the Chinese patent with the application number of 201710772890.1, but the system has poor running general stability, the membrane pollution phenomenon is prominent, and the recovery rate is lower than 70%. The sewage treatment system has the characteristics of high content of organic matters and microorganisms for the circulating water and sewage of the municipal reclaimed water source, and the pollution to the membrane system is more serious, so that the treatment difficulty of the wastewater is higher, and the recovery rate is lower.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a thermal power plant's circulating water blowdown advanced treatment system at municipal reclaimed water source, can handle and the retrieval and utilization to this type of waste water effectively, and the rate of recovery is higher.
The utility model provides a technical scheme that above-mentioned problem adopted is: a thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source is characterized by comprising a circulating water blowdown water regulating tank, a sulfuric acid dosing device, an iron-carbon internal electrolysis system, an oxidation reaction system, a middle water tank, a dosing system, a coagulating sedimentation tank, a clean water tank, a high-efficiency fiber filter, a filter water tank, an electric adsorption device, a water production tank and a concentrated water tank; the water inlet of circulating water blowdown water equalizing basin is linked together with sulphuric acid charge device's export, the delivery port of circulating water blowdown water equalizing basin is linked together with electrolysis system's in the iron carbon water inlet, electrolysis system's delivery port is linked together through oxidation reaction system and middle pond and coagulating sedimentation tank's water inlet in proper order in the iron carbon, the export of charge system is linked together with coagulating sedimentation tank's medicament entry, coagulating sedimentation tank's delivery port is linked together with the water inlet of clean water basin, the delivery port of clean water basin is linked together through high-efficient fiber filter and filter tank, filter tank's delivery port is linked together with electric adsorption equipment's water inlet, electric adsorption equipment's product water export, dense water export are linked together with the water inlet of producing water tank, dense water tank's water inlet respectively.
Furthermore, electrolysis system in the iron carbon includes electrolysis reactor in the iron carbon, first fan and reflux unit, the air outlet of first fan is linked together with the income wind gap of electrolysis reactor bottom in the iron carbon, the delivery port of electrolysis reactor is linked together with reflux unit's water inlet in the iron carbon, reflux unit's delivery port is linked together with the water inlet of electrolysis reactor in the iron carbon, the delivery port of circulating water blowdown water equalizing basin is linked together with the water inlet of electrolysis reactor in the iron carbon, the delivery port of electrolysis reactor is linked together with oxidation reaction system's water inlet in the iron carbon.
Furthermore, the oxidation reaction system comprises an oxidation reaction tank, a second fan and H2O2The air outlet of the second fan is communicated with the air inlet at the bottom of the oxidation reaction tank, and the air inlet of the second fan is communicated with the air outlet of the second fan2O2The outlet of the dosing device is communicated with the water inlet of the oxidation reaction tank, and the water outlet of the oxidation reaction tank is communicated with the water inlet of the coagulation sedimentation tank.
Further, the dosing system comprises a sodium hydroxide dosing device, a polymeric ferric chloride dosing device and a coagulant aid dosing device, wherein an outlet of the sodium hydroxide dosing device, an outlet of the polymeric ferric chloride dosing device and an outlet of the coagulant aid dosing device are all communicated with a medicament inlet of the coagulating sedimentation tank.
Further, still include sludge concentration tank and hydroextractor, sludge concentration tank's entry is linked together with the row mud mouth of coagulating sedimentation bottom, sludge concentration tank's bottom mud outlet is linked together with the entry of hydroextractor, sludge concentration tank's supernatant export and the delivery port of hydroextractor all are linked together with the water inlet of circulating water blowdown water equalizing basin.
Furthermore, a self-water outlet of the high-efficiency fiber filter is communicated with a water inlet of the middle water pool.
Further, a water outlet of the circulating water sewage regulating tank is communicated with a water inlet of the iron-carbon internal electrolysis reactor through a first water pump; the water outlet of the middle water tank is communicated with the water inlet of the coagulating sedimentation tank through a second water pump; the water outlet of the clean water tank is communicated with the water inlet of the high-efficiency fiber filter through a third water pump; and the water outlet of the filter water tank is communicated with the water inlet of the electric adsorption device through a fourth water pump.
Compared with the prior art, the utility model, have following advantage and effect:
in the process of treating municipal reclaimed water source circulating water sewage, pH adjustment is carried out in a circulating water sewage adjusting tank, organic matter degradation removal reaction is carried out in an iron-carbon internal electrolysis system and an oxidation reaction system, sodium hydroxide, polyferric chloride and a coagulant aid are added into a coagulating sedimentation tank for coagulating sedimentation reaction, filtration is carried out in a high-efficiency fiber filter, desalination is carried out in an electric adsorption device, finally, produced water can be recycled to a cooling tower as make-up water, concentrated water can be recycled to a wet desulphurization system as process water, and therefore deep treatment and recycling of the circulating water sewage are completed. By simultaneously using iron-carbon to internally electrolyze H2O2The strong oxidation coupling process can effectively remove the organic matters which are difficult to degrade in the municipal reclaimed water source circulating water sewage and are CODCrThe removal rate can reach more than 60 percent. Simultaneously, in the coagulating sedimentation process, sodium hydroxide, polyferric and coagulant aid are added, so that the particles and colloidal substances in the water are subjected to flocculating sedimentation, and the organic matter content, COD (chemical oxygen demand) is further reducedCrThe removal rate can reach more than 20 percent. The filter adopts a high-efficiency fiber filter material, a small-resistance water distribution system, an air-water back flushing and constant water level filtering mode, and has the characteristics of good sewage interception performance and good back flushing effect. The desalting system adopts an electric adsorption device, has low requirement on water inlet, does not need to add a scale inhibitor and a reducing agent, and has low operation energy consumption and water yield of 80 percent. In addition, the desalting rate of the electro-adsorption device is about 75%, the produced water can be recycled to the cooling tower as make-up water, and COD in the concentrated water is not concentrated and can be directly recycled to the wet desulphurization system without influencing the wet desulphurization system.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1 is a circulating water sewage regulating tank, 2 is a sulfuric acid dosing device, 3 is a first water pump, 4 is an iron-carbon internal electrolysis reactor, 5 is a first fan, 6 is a reflux device, 7 is an oxidation reaction tank, 8 is a second fan, and 9 is H2O2The device comprises a dosing device, a middle water tank 10, a second water pump 11, a sodium hydroxide dosing device 12, a polyferric chloride dosing device 13, a coagulant aid dosing device 14, a coagulating sedimentation tank 15, a sludge concentration tank 16, a dehydrator 17, a clear water tank 18, a third water pump 19, a high-efficiency fiber filter 20, a filter water tank 21, a fourth water pump 22, an electric adsorption device 23, a water production tank 24 and a concentrated water tank 25.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the thermal power plant circulating water blowdown water advanced treatment system of the municipal reclaimed water source in the embodiment includes a circulating water blowdown water regulating tank 1, a sulfuric acid dosing device 2, an iron-carbon internal electrolysis system, an oxidation reaction system, an intermediate water tank 10, a dosing system, a coagulating sedimentation tank 15, a clean water tank 18, a high-efficiency fiber filter 20, a filter water tank 21, an electric adsorption device 23, a water production tank 24 and a concentrated water tank 25.
The water inlet of the circulating water sewage adjusting tank 1 is communicated with the outlet of the sulfuric acid dosing device 2, the water outlet of the circulating water sewage adjusting tank 1 is communicated with the water inlet of an iron-carbon internal electrolysis system, the water outlet of the iron-carbon internal electrolysis system is communicated with the water inlet of the coagulating sedimentation tank 15 through an oxidation reaction system and an intermediate water tank 10 in sequence, the outlet of the dosing system is communicated with the medicament inlet of the coagulating sedimentation tank 15, the water outlet of the coagulating sedimentation tank 15 is communicated with the water inlet of a clean water tank 18, the water outlet of the clean water tank 18 is communicated with a filter water tank 21 through a high-efficiency fiber filter 20, the water outlet of the filter water tank 21 is communicated with the water inlet of an electric adsorption device 23, and the produced water outlet and the concentrated water outlet of the electric adsorption device 23 are respectively communicated with the water.
In this embodiment, the iron-carbon internal electrolysis system includes an iron-carbon internal electrolysis reactor 4, a first fan 5 and a backflow device 6, an air outlet of the first fan 5 is communicated with an air inlet at the bottom of the iron-carbon internal electrolysis reactor 4, a water outlet of the iron-carbon internal electrolysis reactor 4 is communicated with a water inlet of the backflow device 6, a water outlet of the backflow device 6 is communicated with a water inlet of the iron-carbon internal electrolysis reactor 4, a water outlet of the circulating water sewage regulating tank 1 is communicated with a water inlet of the iron-carbon internal electrolysis reactor 4, and a water outlet of the iron-carbon internal electrolysis reactor 4 is communicated with a water inlet of the oxidation reaction system. The oxidation reaction system comprises an oxidation reaction tank 7, a second fan 8 and H2O2A chemical adding device 9, an air outlet of the second fan 8 is communicated with an air inlet at the bottom of the oxidation reaction tank 7, H2O2The outlet of the chemical adding device 9 is communicated with the water inlet of the oxidation reaction tank 7, and the water outlet of the oxidation reaction tank 7 is communicated with the water inlet of the coagulating sedimentation tank 15. The dosing system comprises a sodium hydroxide dosing device 12, a polyferric chloride dosing device 13 and a coagulant aid dosing device 14, wherein an outlet of the sodium hydroxide dosing device 12, an outlet of the polyferric chloride dosing device 13 and an outlet of the coagulant aid dosing device 14 are all communicated with a medicament inlet of the coagulating sedimentation tank 15.
In addition, the system also comprises a sludge concentration tank 16 and a dehydrator 17, wherein an inlet of the sludge concentration tank 16 is communicated with a sludge discharge port at the bottom of the coagulating sedimentation tank 15, a sludge outlet at the bottom of the sludge concentration tank 16 is communicated with an inlet of the dehydrator 17, and a supernatant outlet of the sludge concentration tank 16 and a water outlet of the dehydrator 17 are both communicated with a water inlet of the circulating water sewage adjusting tank 1. The self-service water outlet of the high-efficiency fiber filter 20 is communicated with the water inlet of the middle water pool 10. The water outlet of the circulating water sewage regulating tank 1 is communicated with the water inlet of the iron-carbon internal electrolysis reactor 4 through a first water pump 3; the water outlet of the middle water tank 10 is communicated with the water inlet of the coagulating sedimentation tank 15 through a second water pump 11; the water outlet of the clean water tank 18 is communicated with the water inlet of the high-efficiency fiber filter 20 through a third water pump 19; the water outlet of the filtering water tank 21 is communicated with the water inlet of the electric adsorption device 23 through a fourth water pump 22.
The working process is as follows: circulating water blowdown water of thermal power plant of municipal reclaimed water source adjusts pH through sulphuric acid charge device 2 in circulating water blowdown regulating reservoir 1, later get into electrolytic reactor 4 in the iron carbon through first water pump 3, carry out periodic strong aeration to electrolytic reactor 4 in the iron carbon through first fan 5, the velocity of flow of water in electrolytic reactor 4 guarantees through reflux unit 6 control iron carbon that the filler is in the fluidization more than 0.3 m/s, water after electrolytic reactor 4 oxidation treatment in the iron carbon gets into oxidation reaction tank 7 and carries out further strong oxidation, second fan 8 carries out aeration stirring to oxidation reaction tank 7, H is the water for the steam generator, the steam generator is used for generating steam generator, the steam generator is2O2The chemical adding device 9 adds H into the oxidation reaction tank 72O2Strong oxidation treatment is carried out, the effluent of the oxidation reaction tank 7 enters an intermediate water tank 10, and enters a coagulating sedimentation tank 15 through a second water pump 11, sodium hydroxide, polyferric chloride and coagulant aid are added into the coagulating sedimentation tank 15 for coagulating sedimentation reaction, the sludge generated by the coagulating sedimentation tank 15 enters a sludge concentration tank 16 for sedimentation and concentration, the sludge discharged from the sludge concentration tank 16 enters a dehydrator 17 for dehydration, the supernatant of the sludge concentration tank 16 and the water dehydrated by the dehydrator 17 return to a circulating water and sewage adjusting tank 1, the effluent of the coagulating sedimentation tank 15 enters a clear water tank 18, the effluent enters a high efficiency fiber filter 20 through a third water pump 19 for filtration treatment, the self-used water of the high efficiency fiber filter 20 returns to the intermediate water tank 10, the effluent of the high efficiency fiber filter 20 enters a filter water tank 21, the effluent enters an electric adsorption device 23 through a fourth water pump 22 for desalination treatment, and the produced water of the electric adsorption device 23 enters a production water tank 24, The concentrated water enters a concentrated water tank 25, the water discharged from the water production tank 24 can be recycled to the cooling tower as make-up water, and the water discharged from the concentrated water tank 25 can be recycled to the wet desulphurization system as process water.
Wherein the pH value of inlet water of the iron-carbon internal electrolysis reactor 4 is controlled between 3.5 and 4.5, and the reaction time is 1.5 h; the iron-carbon internal electrolysis reactor 4 adopts a three-phase fluidized bed process; h added in the oxidation reaction tank 72O2The amount of the wastewater is COD of the circulating water Cr1/4, the reaction time is 60 min; the electro-adsorption device 23 adopts two working processes of operation and regeneration, and periodically carries out acid washing on the electro-adsorption module, the recovery rate is 80 percent,the salt rejection was 75%.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as being included in the following claims.
Claims (7)
1. A thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source is characterized by comprising a circulating water blowdown water adjusting tank (1), a sulfuric acid dosing device (2), an iron-carbon internal electrolysis system, an oxidation reaction system, a middle water tank (10), a dosing system, a coagulating sedimentation tank (15), a clean water tank (18), a high-efficiency fiber filter (20), a filter water tank (21), an electric adsorption device (23), a water production tank (24) and a concentrated water tank (25); the water inlet of circulating water blowdown water equalizing basin (1) is linked together with the export of sulphuric acid charge device (2), the delivery port of circulating water blowdown water equalizing basin (1) is linked together with the water inlet of electrolysis system in the iron carbon, electrolysis system's delivery port is linked together through oxidation reaction system and middle pond (10) and the water inlet of coagulating sedimentation pond (15) in proper order in the iron carbon, the export of charge system is linked together with the medicament entry of coagulating sedimentation pond (15), the delivery port of coagulating sedimentation pond (15) is linked together with the water inlet of clean water pond (18), the delivery port of clean water pond (18) is linked together through high-efficient fiber filter (20) and filtration water tank (21), the delivery port of filtration water tank (21) is linked together with the water inlet of electro-adsorption device (23), the product water export, the dense water export of electro-adsorption device (23) respectively with the water inlet of product water tank (24), The water inlets of the concentrated water tank (25) are communicated.
2. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 1, characterized in that, the iron carbon internal electrolysis system comprises an iron carbon internal electrolysis reactor (4), a first fan (5) and a backflow device (6), the air outlet of the first fan (5) is communicated with the air inlet at the bottom of the iron carbon internal electrolysis reactor (4), the water outlet of the iron carbon internal electrolysis reactor (4) is communicated with the water inlet of the backflow device (6), the water outlet of the backflow device (6) is communicated with the water inlet of the iron carbon internal electrolysis reactor (4), the water outlet of the circulating water blowdown water regulating tank (1) is communicated with the water inlet of the iron carbon internal electrolysis reactor (4), and the water outlet of the iron carbon internal electrolysis reactor (4) is communicated with the water inlet of the oxidation reaction system.
3. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 1, wherein the oxidation reaction system comprises an oxidation reaction tank (7), a second fan (8) and H2O2A dosing device (9), wherein the air outlet of the second fan (8) is communicated with the air inlet at the bottom of the oxidation reaction tank (7), and H2O2The outlet of the chemical adding device (9) is communicated with the water inlet of the oxidation reaction tank (7), and the water outlet of the oxidation reaction tank (7) is communicated with the water inlet of the coagulating sedimentation tank (15).
4. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 1, characterized in that, the medicine system includes sodium hydroxide charge device (12), poly ferric chloride charge device (13) and coagulant aid charge device (14), the export of sodium hydroxide charge device (12), the export of poly ferric chloride charge device (13) and the export of coagulant aid charge device (14) all communicate with the medicament inlet of coagulating sedimentation tank (15).
5. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 1, characterized by further comprising a sludge concentration tank (16) and a dehydrator (17), wherein the inlet of the sludge concentration tank (16) is communicated with the sludge discharge port at the bottom of the coagulating sedimentation tank (15), the sludge outlet at the bottom of the sludge concentration tank (16) is communicated with the inlet of the dehydrator (17), and the supernatant outlet of the sludge concentration tank (16) and the water outlet of the dehydrator (17) are both communicated with the water inlet of the circulating water blowdown water regulating tank (1).
6. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 1, wherein the self-service water outlet of the high efficiency fiber filter (20) is communicated with the water inlet of the intermediate water tank (10).
7. The thermal power plant circulating water blowdown water deep treatment system of municipal reclaimed water source according to claim 2, characterized in that the water outlet of the circulating water blowdown water regulating reservoir (1) is communicated with the water inlet of the iron-carbon internal electrolysis reactor (4) through a first water pump (3); the water outlet of the intermediate water tank (10) is communicated with the water inlet of the coagulating sedimentation tank (15) through a second water pump (11); the water outlet of the clean water tank (18) is communicated with the water inlet of the high-efficiency fiber filter (20) through a third water pump (19); the water outlet of the filtering water tank (21) is communicated with the water inlet of the electric adsorption device (23) through a fourth water pump (22).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112358885A (en) * | 2020-09-21 | 2021-02-12 | 临涣焦化股份有限公司 | Circulating water source system for coke dry quenching process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358885A (en) * | 2020-09-21 | 2021-02-12 | 临涣焦化股份有限公司 | Circulating water source system for coke dry quenching process |
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