CN115571997A - Method for utilizing industrial wastewater reuse water of power plant to desulfurization process water - Google Patents
Method for utilizing industrial wastewater reuse water of power plant to desulfurization process water Download PDFInfo
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- CN115571997A CN115571997A CN202211005804.1A CN202211005804A CN115571997A CN 115571997 A CN115571997 A CN 115571997A CN 202211005804 A CN202211005804 A CN 202211005804A CN 115571997 A CN115571997 A CN 115571997A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 226
- 238000000034 method Methods 0.000 title claims abstract description 64
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 63
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 27
- 230000023556 desulfurization Effects 0.000 title claims abstract description 27
- 239000002351 wastewater Substances 0.000 claims abstract description 23
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 54
- 238000001556 precipitation Methods 0.000 claims description 38
- 230000015271 coagulation Effects 0.000 claims description 20
- 238000005345 coagulation Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000003860 storage Methods 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
-
- 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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- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a method for utilizing industrial wastewater reuse water of a power plant to desulfurization process water, which comprises the following steps: classifying waste water: dividing the wastewater into treatment grades; and (3) branch processing: introducing the obtained wastewater with the classified treatment grades into a graded wastewater treatment system, treating the wastewater by adopting the most rapid, most environment-friendly and most energy-saving treatment mode according to different grades to obtain industrial wastewater reuse water, and storing the industrial wastewater reuse water in a return water tank; user grading: grading users of the desulfurization process water, wherein the first-level users can use industrial wastewater reuse water; secondary users cannot use industrial wastewater reuse water; introducing reuse water: the industrial wastewater reuse water is directly utilized through a water diversion pipeline system and a water utilization main pipe of a primary user, and the method has the advantages of high efficiency, low cost and rapid treatment of reuse water; the recycling rate of the industrial wastewater is improved; the operation reliability of a desulfurization process water system is improved; the risk of water quality pollution of a process water system possibly caused by directly supplementing water to a process water tank is reduced.
Description
Technical Field
The invention relates to the technical field of environmental protection of thermal power plants, in particular to a method for utilizing industrial wastewater of a power plant to desulfurization process water.
Background
At present, the industrial wastewater treatment field of domestic power plants generally realizes standard discharge after wastewater treatment, and more newly built power plants select to realize standard recycling after wastewater treatment along with the improvement of environmental protection consciousness in recent years so as to reduce the influence on environment and an ecosystem.
The general recycled water is used for plant greening, coal yard spraying and the like, and has the problems of low recycling rate, few available users and difficult realization of full-capacity recycling.
The application rate of limestone and gypsum wet desulphurization process in thermal power plant is about 80%, and under the rated working condition of a certain power plant, the process water consumption of a desulphurization system is about 100m 3 The water consumption is relatively large. The process water of the desulfurization system adopts seawater desalination primary reverse osmosis produced water as a normal water source, fire water as an emergency water source, and the water production cost is high.
A great part of the industrial wastewater of the thermal power plant is wastewater with better water quality discharged from the daily production of the unit, and the wastewater is directly discharged after treatment or is completely recycled to a factory for miscellaneous use, thereby causing resource waste. On the basis, by comparing the technical specification index of the industrial wastewater reuse water with the water quality requirement of the desulphurization process water, the industrial wastewater reuse water is found to be relatively close to the desulphurization process water, and the aim of improving the recovery rate of the industrial wastewater is fulfilled.
And some waste water with better water quality can reach the technical specification index of industrial waste water reuse water only by partial steps in the treatment process, but the prior art basically leads all the waste water to be uniformly treated in all the treatment processes, so that the loss of treatment equipment is larger, the treatment cost is high, the treatment time is longer, and the supply requirement is difficult to meet.
Disclosure of Invention
The invention provides a method for utilizing industrial wastewater reuse water of a power plant to desulfurization process water, and aims to solve the technical problem of how to rapidly treat industrial wastewater into reuse water and utilize the reuse water into desulfurization process water at low cost in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for utilizing industrial wastewater reuse water of a power plant to desulfurization process water comprises the following steps:
s1, wastewater classification: wastewater generated by each unit equipment of the power plant passes through a water quality detection grading system before entering a treatment process, and the wastewater is graded according to data obtained by detection;
s2, subsection processing: introducing the wastewater with the treatment grade obtained in the step S1 into a graded wastewater treatment system, treating the wastewater by adopting the most rapid, most environment-friendly and most energy-saving treatment mode according to different grades to obtain industrial wastewater reuse water, and storing the industrial wastewater reuse water in a return water tank;
s3, user classification: grading the desulfurization process water users by comparing and comparing the industrial wastewater reuse water technical specification index and the desulfurization process water replenishing water quality requirement, wherein the first-level users can use the industrial wastewater reuse water; the secondary user can not use the industrial wastewater reuse water;
s4, introducing reuse water: and (3) enabling the industrial wastewater reuse water obtained in the step (S2) to pass through a water diversion pipeline system and be directly used on the primary user water using mother pipe obtained in the step (S3).
Further, the water quality detection and classification system in the step S1 comprises a COD sensor, a suspended matter sensor, a pH sensor and a chloride ion sensor.
Further, in step S2, the graded wastewater treatment system comprises a coagulation device, a precipitation device, a filtration device and a pH value adjusting device, wherein the coagulation device is connected with the input end of the pH value adjusting device through a pipeline respectively, the output end of the water quality detection grading system is connected with the output end of the pH value adjusting device through a pipeline respectively, the precipitation device is connected with the filtration device through a pipeline respectively, the output end of the reuse water collecting pipe is connected with a reuse water tank, the coagulation device is connected with the precipitation device, the filtration device is connected with the front end of the pH value adjusting device through a graded input electromagnetic valve respectively, and the coagulation device is connected with the precipitation device, the filtration device is connected with the rear end of the pH value adjusting device through an electric control water pump respectively.
Further, the output of the coagulation equipment with between the output of precipitation equipment, the middle part of reuse water collector pipe is equipped with suspended solid sensor, deposit the solenoid valve that opens circuit and deposits the output check valve in proper order, the suspended solid sensor with deposit between the solenoid valve that opens circuit, the middle part of reuse water collector pipe is connected through deposiing the shunt tubes the input of precipitation equipment, the middle part of deposiing the shunt tubes is equipped with deposits the shunt valves.
Furthermore, a chloride ion sensor, a filtering open-circuit electromagnetic valve and a filtering output check valve are sequentially arranged between the output end of the precipitation device and the output end of the filtering device and in the middle of the reuse water collecting pipe, the chloride ion sensor and the filtering open-circuit electromagnetic valve are connected with the middle of the reuse water collecting pipe through a filtering shunt pipe, and the filtering shunt electromagnetic valve is arranged in the middle of the filtering shunt pipe.
Further, a pH sensor, a pH adjusting and breaking solenoid valve and a pH adjusting and outputting check valve are sequentially disposed between the output end of the filtering device and the output end of the pH adjusting device and in the middle of the recycled water collecting pipe, the pH sensor and the pH adjusting and breaking solenoid valve and in the middle of the recycled water collecting pipe are connected to the input end of the pH adjusting device through a pH adjusting and distributing pipe, and a pH adjusting and distributing solenoid valve is disposed in the middle of the pH adjusting and distributing pipe.
Further, the primary user in step S3 includes: pipe cleaning water and a process water system.
Further, the secondary user in step S3 includes: the slurry circulating pump mechanically seals the water.
Further, in step S4 the diversion pipeline system includes a diversion pipeline, the input end of the diversion pipeline is arranged in the return water pool, the plurality of output ends of the diversion pipeline are respectively connected with the plurality of first-level users in step S3, and the middle part of the diversion pipeline is provided with a reuse water pump.
Furthermore, a security filter is arranged at the rear end of the reuse water pump.
Compared with the prior art, the invention has the beneficial effects that:
the reuse water is quickly treated with high efficiency and low cost by matching the water quality detection grading system with the grading wastewater treatment system; the recycling rate of the industrial wastewater is improved; the operation reliability of a desulfurization process water system is improved; the risk of water quality pollution of a process water system possibly caused by directly supplementing water to a process water tank is reduced.
Drawings
FIG. 1 is a schematic diagram of a water way structure at the front end of a water return pool;
FIG. 2 is a schematic diagram of a water path structure at the rear end of the water return pool.
In the figure: 11. a reuse water collecting pipe; 12. inputting electromagnetic valves in a grading way; 13. an electric control water pump; 21. a suspended matter sensor; 22. a precipitate cut-off solenoid valve; 23. a sediment output check valve; 24. a sedimentation shunt pipe; 25. a sedimentation shunt solenoid valve; 31. a chloride ion sensor; 32. filtering the cut-off electromagnetic valve; 33. a filtration output check valve; 34. filtering the shunt pipe; 35. a filtering shunt electromagnetic valve; 41. a pH sensor; 42. a pH value adjusting open-circuit electromagnetic valve; 43. a pH value adjusting output check valve; 44. a pH value adjusting shunt pipe; 45. a pH value adjusting shunt electromagnetic valve; 51. a water conduit; 52. a recycling water pump; 53. and (4) a cartridge filter.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In one embodiment, a method for utilizing power plant industrial wastewater reuse water to desulfurize process water comprises the following steps:
s1, wastewater classification: wastewater generated by each unit device of the power plant passes through a water quality detection grading system before entering a treatment process, and the wastewater is graded according to data obtained by detection;
s2, subsection processing: introducing the wastewater with the treatment grade obtained in the step S1 into a graded wastewater treatment system, treating the wastewater by adopting the most rapid, most environment-friendly and most energy-saving treatment mode according to different grades to obtain industrial wastewater reuse water, and storing the industrial wastewater reuse water in a return water tank;
s3, user classification: grading desulfurization process water users by comparing and comparing the technical specification index of industrial wastewater reuse water and the water quality requirement of desulfurization process water, wherein the first-level users can use the industrial wastewater reuse water; the secondary user can not use the industrial wastewater reuse water;
s4, introducing reuse water: and (3) enabling the industrial wastewater reuse water obtained in the step (S2) to pass through a water diversion pipeline system and be directly used on the primary user water using mother pipe obtained in the step (S3).
In the embodiment, the water quality detection and classification system in the step S1 comprises a COD (chemical oxygen demand) sensor, a suspended matter sensor, a pH (potential of Hydrogen) sensor and a chloride ion sensor, and various data of industrial wastewater are obtained through a plurality of sensors so as to classify the industrial wastewater; the higher COD value is the fourth grade; the COD value is lower, but the suspended matter value is higher, and the value is a third grade; the COD value and the suspended matter value are both lower, but the chloride ion value is higher, and the second grade is adopted; only those with an unsatisfactory pH are rated as first grade.
In the embodiment, please refer to fig. 1 again, the step S2 includes a coagulation device, a precipitation device, a filtration device and a pH adjusting device, the input ends of the coagulation device, the precipitation device, the filtration device and the pH adjusting device are respectively connected to the output end of the water quality detection classification system through pipes, the output ends of the coagulation device, the precipitation device, the filtration device and the pH adjusting device are respectively connected to a recycled water collecting pipe 11 through pipes, the output end of the recycled water collecting pipe 11 is connected to a recycled water tank, the front ends of the coagulation device, the precipitation device, the filtration device and the pH adjusting device are respectively provided with a classification input electromagnetic valve 12, the rear ends of the coagulation device, the precipitation device, the filtration device and the pH adjusting device are respectively provided with an electrically controlled water pump 13, the middle portions of the output end of the coagulation device and the precipitation device, the recycled water collecting pipe 11 are respectively provided with a suspended substance sensor 21, a precipitation open-circuit-break electromagnetic valve 22 and a precipitation output valve 23, the middle portions of the output end of the precipitation device and the recycle water collecting pipe 11 are respectively provided with a suspended substance sensor 21, a precipitation open-break electromagnetic valve 22, the middle portion of the precipitation device and a non-break electromagnetic valve 24 is connected to the middle portion of the filtration water collecting pipe 11, and the middle portion of the filtration water-break electromagnetic valve 32 is provided with a filtration water-break electromagnetic valve 32, a filtering shunt electromagnetic valve 35 is arranged in the middle of the filtering shunt pipe 34, a pH sensor 41, a pH value adjusting open-circuit electromagnetic valve 42 and a pH value adjusting output check valve 43 are sequentially arranged between the output end of the filtering device and the output end of the pH value adjusting device and in the middle of the reuse water collecting pipe 11, the pH sensor 41 and the pH value adjusting open-circuit electromagnetic valve 42 and in the middle of the reuse water collecting pipe 11 are connected with the input end of the pH value adjusting device through a pH value adjusting shunt pipe 44, and a pH value adjusting shunt electromagnetic valve 45 is arranged in the middle of the pH value adjusting shunt pipe 44, so that the switching of a plurality of graded input electromagnetic valves 12 is controlled according to the classification of industrial wastewater; introducing the industrial wastewater of the fourth grade into coagulation equipment for treatment, introducing the industrial wastewater of the third grade into precipitation equipment for treatment, introducing the industrial wastewater of the second grade into filtration equipment for treatment, and introducing the industrial wastewater of the first grade into pH value regulation equipment for treatment; the water treated by each device is output to a reuse water collecting pipe 11 through an electric control water pump 13; the water output by the coagulation equipment needs to pass through a suspended matter sensor 21, if the numerical value reaches the standard, the water directly passes through a precipitation open-circuit electromagnetic valve 22 and a precipitation output check valve 23, and if the numerical value does not reach the standard, the precipitation open-circuit electromagnetic valve 22 is closed, a precipitation shunt electromagnetic valve 25 is opened, and the water enters the precipitation equipment through a precipitation shunt pipe 24 for treatment; the water output by the precipitation equipment needs to pass through a chloride ion sensor 31, if the numerical value reaches the standard, the water directly passes through a filtering open-circuit electromagnetic valve 32 and a filtering output check valve 33, if the numerical value does not reach the standard, the filtering open-circuit electromagnetic valve 32 is closed, a filtering shunt electromagnetic valve 35 is opened, and the water enters the filtering equipment through a filtering shunt pipe 34 for treatment; the water output by the filtering equipment needs to pass through a pH sensor 41, if the numerical value reaches the standard, the water directly passes through a pH value adjusting open circuit electromagnetic valve 42 and a pH value adjusting output check valve 43, if the numerical value does not reach the standard, the pH value adjusting open circuit electromagnetic valve 42 is closed, a pH value adjusting shunt electromagnetic valve 45 is opened, the water enters the pH value adjusting equipment for treatment through a pH value adjusting shunt pipe 44, and finally the water enters a reuse water pool through a reuse water collecting pipe 11 for storage and standby application.
In an embodiment, the primary user in step S3 includes: a washing water and a process water system are removed through a pipe, and the secondary user in the step S3 comprises the following steps: the slurry circulating pump mechanically seals the water.
In the embodiment, please refer to fig. 2 again, the water conduit system in step S4 includes a water conduit 51, an input end of the water conduit 51 is disposed in the water returning pool, a plurality of output ends of the water conduit 51 are respectively connected to the plurality of first-class users in step S3, a reuse water pump 52 is disposed in the middle of the water conduit 51, and a safety filter 53 is disposed at a rear end of the reuse water pump 52, so that the reuse water in the reuse water pool is filtered by the safety filter 53 and then sent to the plurality of first-class users for direct use.
The operation principle is as follows: firstly, various data of industrial wastewater are obtained through a plurality of sensors, so that the industrial wastewater is classified; the higher COD value is the fourth grade; the COD value is lower, but the suspended matter value is higher, and the value is a third grade; the COD value and the suspended matter value are both lower, but the chloride ion value is higher, and the second grade is adopted; only the pH value which does not reach the standard is the first grade; controlling the switch of a plurality of graded input electromagnetic valves 12 according to the grading of the industrial wastewater; introducing the industrial wastewater of the fourth grade into coagulation equipment for treatment, introducing the industrial wastewater of the third grade into precipitation equipment for treatment, introducing the industrial wastewater of the second grade into filtration equipment for treatment, and introducing the industrial wastewater of the first grade into pH value regulation equipment for treatment; the water treated by each device is output to a reuse water collecting pipe 11 through an electric control water pump 13; the water output by the coagulation equipment needs to pass through a suspended matter sensor 21, if the numerical value reaches the standard, the water directly passes through a precipitation open-circuit electromagnetic valve 22 and a precipitation output check valve 23, and if the numerical value does not reach the standard, the precipitation open-circuit electromagnetic valve 22 is closed, a precipitation shunt electromagnetic valve 25 is opened, and the water enters the precipitation equipment through a precipitation shunt pipe 24 for treatment; the water output by the precipitation equipment needs to pass through a chloride ion sensor 31, if the numerical value reaches the standard, the water directly passes through a filtering open-circuit electromagnetic valve 32 and a filtering output check valve 33, if the numerical value does not reach the standard, the filtering open-circuit electromagnetic valve 32 is closed, a filtering shunt electromagnetic valve 35 is opened, and the water enters the filtering equipment for treatment through a filtering shunt pipe 34; the water output by the filtering equipment needs to pass through a pH sensor 41, if the numerical value reaches the standard, the water directly passes through a pH value adjusting open circuit electromagnetic valve 42 and a pH value adjusting output check valve 43, if the numerical value does not reach the standard, the pH value adjusting open circuit electromagnetic valve 42 is closed, a pH value adjusting shunt electromagnetic valve 45 is opened, the water enters the pH value adjusting equipment for treatment through a pH value adjusting shunt pipe 44, and finally the water enters a reuse water pool through a reuse water collecting pipe 11 for storage for later use; the reuse water in the reuse water pool is filtered by a security filter 53 through a reuse water pump 52 and then is sent to a plurality of first-level users for direct utilization.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (10)
1. A method for utilizing industrial wastewater reuse water of a power plant to desulfurization process water is characterized by comprising the following steps: the method comprises the following steps:
s1, wastewater classification: wastewater generated by each unit equipment of the power plant passes through a water quality detection grading system before entering a treatment process, and the wastewater is graded according to data obtained by detection;
s2, subsection processing: introducing the wastewater with the treatment grade obtained in the step S1 into a graded wastewater treatment system, treating the wastewater by adopting the most rapid, most environment-friendly and most energy-saving treatment mode according to different grades to obtain industrial wastewater reuse water, and storing the industrial wastewater reuse water in a return water tank;
s3, user classification: grading the desulfurization process water users by comparing and comparing the industrial wastewater reuse water technical specification index and the desulfurization process water replenishing water quality requirement, wherein the first-level users can use the industrial wastewater reuse water; secondary users cannot use industrial wastewater reuse water;
s4, introducing reuse water: and (4) enabling the industrial wastewater reuse water obtained in the step (S2) to pass through a water diversion pipeline system and be directly used on the primary user water using mother pipe obtained in the step (S3).
2. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 1, wherein: and in the step S1, the water quality detection grading system comprises a COD (chemical oxygen demand) sensor, a suspended matter sensor, a pH (potential of hydrogen) sensor and a chloride ion sensor.
3. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 1, characterized in that: in the step S2, the graded wastewater treatment system comprises a coagulation device, a precipitation device, a filtering device and a pH value adjusting device, wherein the coagulation device is connected with the input end of the pH value adjusting device through a pipeline respectively, the output end of the water quality detection grading system is connected with the precipitation device through a pipeline respectively, the filtering device is connected with the output end of the pH value adjusting device through a pipeline respectively, a reuse water collecting pipe (11) is connected with the output end of the reuse water collecting pipe (11), the coagulation device is connected with a reuse water tank, the filtering device is connected with the front end of the pH value adjusting device respectively, and the front end of the coagulation device is provided with a graded input electromagnetic valve (12), and the rear end of the coagulation device is provided with an electric control water pump (13).
4. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 3, characterized in that: the output of thoughtlessly congeal the equipment with between the output of precipitation equipment the middle part of reuse water collector pipe (11) is equipped with suspended solid sensor (21), deposits open circuit solenoid valve (22) and deposits output check valve (23) in proper order, suspended solid sensor (21) with deposit between open circuit solenoid valve (22) the middle part of reuse water collector pipe (11) is connected through deposiing shunt tubes (24) the input of precipitation equipment, the middle part of deposiing shunt tubes (24) is equipped with deposits shunt solenoid valve (25).
5. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 3, characterized in that: the utility model discloses a water purification device, including sedimentation equipment, filtration equipment, reuse water collector pipe (11), chlorine ion sensor (31), filtration circuit-breaking solenoid valve (32) and filtration output check valve (33), chlorine ion sensor (31) with between filtration circuit-breaking solenoid valve (32), the middle part of reuse water collector pipe (11) is connected through filtering shunt tubes (34) filtration equipment's input, the middle part of filtering shunt tubes (34) is equipped with filters shunt solenoid valve (35).
6. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 3, characterized in that: the automatic water recycling system is characterized in that a pH sensor (41), a pH value adjusting and breaking electromagnetic valve (42) and a pH value adjusting and outputting check valve (43) are sequentially arranged between the output end of the filtering device and the output end of the pH value adjusting device and in the middle of the reuse water collecting pipe (11), the pH sensor (41) and the pH value adjusting and breaking electromagnetic valve (42) are connected between the reuse water collecting pipe (11) and in the middle of the reuse water collecting pipe (44) through a pH value adjusting and dividing pipe (44) to be connected with the input end of the pH value adjusting device, and a pH value adjusting and dividing electromagnetic valve (45) is arranged in the middle of the pH value adjusting and dividing pipe (44).
7. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 1, wherein: in the step S3, the primary user includes: and (4) removing washing water and a process water system by using a pipe.
8. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 1, wherein: in the step S3, the secondary user includes: the slurry circulating pump mechanically seals the water.
9. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 1, characterized in that: the water conduit system in the step S4 comprises a water conduit (51), the input end of the water conduit (51) is arranged in the water return pool, a plurality of output ends of the water conduit (51) are respectively connected with the plurality of first-level users in the step S3, and a reuse water pump (52) is arranged in the middle of the water conduit (51).
10. The method for utilizing the industrial wastewater reuse water of the power plant to the desulfurization process water according to claim 9, characterized in that: the rear end of the reuse water pump (52) is provided with a security filter (53).
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