CN112897740A

CN112897740A - Wastewater treatment system, method and device for fine treatment of power station condensate

Info

Publication number: CN112897740A
Application number: CN202110073182.5A
Authority: CN
Inventors: 张洪江; 吕雨龙; 李永立; 李志成; 底广辉; 胡远翔; 王熙俊; 顾融融
Original assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Current assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-06-04

Abstract

The present specification provides wastewater treatment systems, methods, and apparatus for the polishing of condensate from power plants. The system is additionally provided and connected with a first resin catcher, a second resin catcher and a waste water step utilization subsystem outside an original power station condensed water fine treatment system comprising a separation tower, a negative tower and a positive tower, wherein the first resin catcher and the second resin catcher separate first waste water with relatively poor water quality and second waste water with relatively good water quality which are discharged by the power station condensed water fine treatment system, and the two types of waste water are respectively subjected to resin recovery and filtration to obtain the filtered first waste water and the filtered second waste water; and then the filtered first-class wastewater and the filtered second-class wastewater are respectively conveyed to a preset wastewater pool and a recovery water pool matched with the water quality grade in the wastewater step utilization subsystem, so that water in different recovery water pools can be accurately and effectively reused in a condensed water fine treatment system of a power station according to the use requirement.

Description

Wastewater treatment system, method and device for fine treatment of power station condensate

Technical Field

The specification belongs to the technical field of power station wastewater treatment, and particularly relates to a wastewater treatment system, method and device for power station condensate fine treatment.

Background

Generally, waste water generated in the process of recovering and treating the invalid resin by a power station condensed water fine treatment system is uniformly discharged into a waste water tank, and then the waste water in the waste water tank is uniformly treated.

Based on the existing wastewater treatment system, the relatively good wastewater quality generated in the fine treatment process of the condensed water of the power station cannot be effectively recycled, and the wastewater treatment cost is increased.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The specification provides a wastewater treatment system, a method and a device for finely treating condensed water in a power station, so as to achieve the technical effects of reducing the amount of wastewater discharged into a wastewater pond, reducing the cost of wastewater treatment and effectively reusing the wastewater with better water quality.

The present specification provides a wastewater treatment system for fine treatment of condensed water in a power station, which at least comprises: a first resin trap, a second resin trap, and a wastewater ladder utilization subsystem; wherein the content of the first and second substances,

the first resin catcher and the second resin catcher are respectively connected with a separation tower, a negative tower and a positive tower in a power station condensed water fine treatment system so as to be connected with different types of wastewater respectively discharged from the separation tower, the negative tower and the positive tower in different treatment stages; the first resin catcher is used for accessing first-class wastewater and filtering and recycling resin in the first-class wastewater; the second resin catcher is used for accessing second type wastewater and filtering and recycling resin in the second type wastewater;

the wastewater step utilization subsystem at least comprises: the system comprises a preset wastewater pool and a plurality of recovery water pools;

the first resin catcher is connected with the preset wastewater pool, and the filtered first type wastewater flowing out of the first resin catcher is conveyed into the preset wastewater pool;

the second resin catcher is connected with the plurality of recovery water pools, and the filtered second type wastewater flowing out of the second resin catcher is conveyed into the matched recovery water pools according to the water quality grade;

the plurality of recovery water tanks are also respectively connected with a power station condensed water fine treatment system through a self-cleaning filter and a first pipeline; a plurality of water pumps are respectively arranged between the plurality of recovery water pools and the self-cleaning filter; the water pumps are used for pumping the water in the recovery water tank which meets the preset use requirement according to the control instruction, filtering the water by the self-cleaning filter and then conveying the water to the condensate fine treatment system of the power station for repeated use through the first pipeline.

In one embodiment, the plurality of recovery basins comprises: a first-stage recycled water pool, a second-stage recycled water pool and a third-stage recycled water pool; the water quality grade of the water stored in the recovered water tertiary pool is higher than that of the recovered water secondary pool, and the water quality grade of the water stored in the recovered water secondary pool is higher than that of the recovered water primary pool.

In one embodiment, a water quality level detector and a plurality of pneumatic valves are further provided between the second resin trap and the plurality of recovery water tanks.

In one embodiment, an electric conductivity detector and a turbidity detector are further arranged between the self-cleaning filter and the first pipeline and are used for detecting whether the quality of the water flowing out of the self-cleaning filter and to be conveyed to the condensate fine treatment system of the power station through the first pipeline meets preset use requirements.

In one embodiment, a second pipeline connected with the first pipeline in parallel is connected behind the conductivity detector and the turbidity detector, the second pipeline is connected with the boiler feed water raw water pool, and the second pipeline is used for conveying water with the water quality which does not meet preset use requirements and flows out of the self-cleaning filter to the boiler feed water raw water pool to be reused after being correspondingly treated.

In one embodiment, a waste water type detector is arranged between the power station condensed water fine treatment system and the first resin catcher and the second resin catcher; wherein the wastewater type detector is used for determining the type of the wastewater according to the source of the wastewater, the treatment stage when the wastewater is discharged, or the characteristics of the wastewater.

The present specification also provides a wastewater treatment method for power station condensate polishing using the above wastewater treatment system for power station condensate polishing, comprising:

determining the source, the treatment stage or the characteristics of the wastewater discharged by a power station condensed water fine treatment system;

determining the type of the wastewater according to the source of the wastewater, the treatment stage or the characteristics of the wastewater;

under the condition that the wastewater is determined to be second type wastewater, a second resin catcher is switched to be used for filtering and recovering resin in the second type wastewater to obtain filtered second type wastewater;

determining the water quality grade of the filtered second-class wastewater;

determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-class wastewater;

and conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

In one embodiment, the method further comprises:

under the condition that the wastewater is determined to be first-class wastewater, a first resin catcher is switched to be used for filtering and recovering resin in the first-class wastewater, and the filtered first-class wastewater is obtained;

and conveying the filtered first-class wastewater to a wastewater pool preset in a wastewater step utilization subsystem.

In one embodiment, determining the type of wastewater based on the source of the wastewater, the treatment stage, or the characteristics of the wastewater comprises:

determining the wastewater as a first type of wastewater under the condition that the source of the wastewater is determined to be a separation tower, the treatment stage is a stage in which the invalid resin is washed in the separation tower, and the color of the wastewater is colored;

determining the wastewater as a second type of wastewater under the conditions that the source of the wastewater is determined to be a separation tower, the treatment stage is a stage in which the spent resin is washed in the separation tower, and the color of the wastewater is colorless;

determining the wastewater to be a second type wastewater after determining the source of the wastewater to be a positive tower and the treatment stage to be a rinsing stage before regeneration of positive resin;

and determining the wastewater as a second type of wastewater after determining that the source of the wastewater is a negative tower and the treatment stage is a rinsing stage before regeneration of negative resin.

This specification still provides a waste water treatment device of power station condensate polishing, includes:

the first determination module is used for determining the source, the treatment stage or the characteristics of the wastewater discharged by the power station condensed water fine treatment system;

the second determining module is used for determining the type of the wastewater according to the source of the wastewater, the treatment stage or the characteristics of the wastewater;

the filtering and recycling module is used for switching to use a second resin catcher to filter and recycle resin in the second type of wastewater under the condition that the wastewater is determined to be the second type of wastewater, so as to obtain the filtered second type of wastewater;

the third determining module is used for determining the water quality grade of the filtered second type wastewater;

the fourth determining module is used for determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second type wastewater;

and the conveying module is used for conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

The specification provides a wastewater treatment system, a method and a device for fine treatment of power station condensate, based on the wastewater treatment system, a first resin catcher, a second resin catcher and a wastewater step utilization subsystem are additionally arranged and connected outside an original power station condensate fine treatment system comprising a separation tower, a negative tower and a positive tower, and the first resin catcher and the second resin catcher are respectively connected with the separation tower, the negative tower and the positive tower so as to be connected with wastewater with different water quality types discharged by different towers in different treatment stages; the first resin catcher is connected with a preset wastewater pool in the wastewater step utilization subsystem, and the second resin catcher is connected with a plurality of different recovery water pools in the wastewater step utilization subsystem; and the different recovery water tanks are connected with a power station condensed water fine treatment system sequentially through the self-cleaning filter and the first pipeline. During specific implementation, the system can firstly obtain and determine the type of the wastewater according to the source of the wastewater, the treatment stage and the characteristics of the wastewater, and separate first wastewater with relatively poor water quality and second wastewater with relatively good water quality which are discharged by the condensed water fine treatment system of the power station; the first resin catcher is specially responsible for accessing and filtering and recycling the resin in the first type of waste water, and the second resin catcher is specially responsible for accessing and filtering and recycling the resin in the second type of waste water; further, can carry the first type waste water after will filtering to predetermined effluent disposal basin through first resin trapper, carry the second type waste water after will filtering to assorted recovery pond according to the difference of quality of water grade through the second resin trapper, so that follow-up can be according to particular case and operation requirement, accurate in the smart processing system of power station condensate water, reuse the water in the different recovery ponds effectively, thereby reach the waste water volume that reduces to discharge in the effluent disposal basin, reduce the waste water treatment cost, the technological effect of the better waste water of quality of water that can also effectively utilize the in-process production simultaneously, the waste water that can't utilize the smart processing system of power station condensate water to discharge that exists in the current system has been solved, the technical problem that the waste water treatment cost is high.

Drawings

In order to more clearly illustrate the embodiments of the present specification, the drawings needed to be used in the embodiments will be briefly described below, and the drawings in the following description are only some of the embodiments described in the specification, and it is obvious to those skilled in the art that other drawings can be obtained based on the drawings without any inventive work.

FIG. 1 is a schematic diagram of an embodiment of a structural configuration of a wastewater treatment system for fine treatment of condensate from a power plant provided by an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an embodiment of the structural configuration of a wastewater step utilization subsystem in a wastewater treatment system for fine treatment of condensate from a power plant provided by an embodiment of the present disclosure;

FIG. 3 is a schematic flow diagram of a wastewater treatment process for polishing condensate from a power plant provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural component diagram of a server provided in an embodiment of the present description;

FIG. 5 is a schematic structural diagram of a wastewater treatment plant for fine treatment of condensate from a power plant according to an embodiment of the present disclosure;

description of the drawings: A. a positive tower (also called a grease storage tower), a negative tower, a separation tower, a D1, a first resin catcher (also called an acid-base waste liquid resin catcher), a D2, a second resin catcher (also called a flushing water resin catcher), a D3 and a waste water step utilization subsystem (also called a water step utilization system);

q1, a main water inlet valve of washing water, M, a self-cleaning filter, M1, a pneumatic valve of qualified recycled water to a washing pipeline, M2, an air valve of unqualified recycled water to a boiler water supply raw water pool, E, a recycled water primary water pool (also called a recyclable primary pool), F, a recycled water secondary water pool (also called a recyclable secondary pool), G, a recycled water tertiary water pool (also called a recyclable tertiary pool), H, a preset wastewater pool (also called a wastewater pool), S51, a manual valve of a first resin adding bucket, S52, a manual valve of a second resin adding bucket, D11, an acid-base drainage pneumatic valve, D12, a pneumatic valve to a preset wastewater pool H, D21, a pneumatic valve of washing drainage, D22, a pneumatic valve of washing water to the recycled water primary water pool, D23, a pneumatic valve of washing water to the recycled water secondary pool, D24, a pneumatic valve of washing water to the recycled water tertiary pool; AQ1, an acid inlet pneumatic valve, AQ2, a middle exhaust pneumatic valve, AQ3, an upper water inlet pneumatic valve, AQ4, a bottom water inlet pneumatic valve, AQ5, a top emptying valve, AQ6, a bottom exhaust pneumatic valve, AQ7, a resin input pneumatic valve, AS1 and a male resin adding manual valve; BQ1, an alkali inlet pneumatic valve, BQ2, a middle exhaust valve, BQ3, an upper water inlet pneumatic valve, BQ4, a bottom water inlet pneumatic valve, BQ5, a top emptying valve, BQ6, a bottom exhaust valve, BS1 and a negative resin adding manual valve; CQ1, a top evacuation valve, CQ2, an upper water inlet pneumatic valve, CQ3, a bottom water inlet pneumatic valve, CQ4, a grease holding pneumatic valve, CQ5, a lower water outlet pneumatic valve, CQ6, an upper row pneumatic valve, CQ7, a female resin output gate, CQ8 and a male resin output valve; EA. EB is a reuse water pump of a first-stage water pool of the reclaimed water (also called a first-stage reuse water pump), FA and FB are reuse water pumps of a second-stage water pool of the reclaimed water (also called a second-stage reuse water pump), GA and GB are reuse water pumps of a third-stage water pool of the reclaimed water (also called a third-stage reuse water pump), S11, S12, S21, S22, S31 and S32 are inlet and outlet hand valves of the reuse water pumps; HA. HB is a preset wastewater pump (also called a wastewater pump) of the wastewater pool, S41 and S42 are respectively an outlet manual door of the wastewater pump, F1 and an outlet pneumatic door of the wastewater delivery pump; l11, a first line, L12, a second line;

electromagnetic valve, LS, liquid level meter, DD, conductivity detector, NTU, turbidity detector, DE, water quality grade detector.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments of the present specification, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any inventive step should fall within the scope of protection of the present specification.

Considering that waste water generated in the process of recovering and treating the ineffective resin is not distinguished in different treatment stages, different sources and different characteristics based on the existing power station condensed water fine treatment system, and is uniformly discharged into the same waste water tank; and then the wastewater is treated by carrying out acid-base neutralization on the wastewater intensively by using corresponding chemical materials.

However, the applicant has found through long-term engineering practice that: the quality of wastewater discharged from different sources (such as a separation tower, a negative tower, a positive tower and the like) in different treatment stages of a condensate polishing system of a power station often varies greatly. For example, in the treatment stages of resin conveying, separation, backwashing, flushing and the like, the water quality of the wastewater discharged from the separation tower is relatively good, and the wastewater can be reused after being treated correspondingly; in the treatment stages of acid and alkali regeneration, replacement, quick rinsing and the like, the water quality of the wastewater discharged from the negative tower and the positive tower is relatively poor and cannot be reused. The existing system can not separate the waste water with different water quality types, but uniformly discharges the waste water with better water quality and the waste water with poorer water quality to a waste water tank without distinguishing, and then uniformly performs acid-base neutralization treatment. This tends to increase the amount of wastewater to be treated, increases the amount of chemical materials used in the acid-base neutralization treatment, and increases the cost of wastewater treatment. Meanwhile, waste water with relatively good water quality in the fine treatment process of the condensed water of the power station cannot be effectively utilized, and resource waste is caused.

In view of the above problems, and in combination with the root cause of the above problems, the applicant contemplated that a first resin trap, a second resin trap, and a wastewater cascade utilization subsystem could be provided and connected in addition to the existing power plant condensate polishing system comprising a separation column, a negative column, and a positive column. The wastewater ladder utilization subsystem comprises a preset wastewater pool and a plurality of different recovery water pools, one end of the first resin catcher is connected with the separation tower, the negative tower and the positive tower, the other end of the first resin catcher is connected with the preset wastewater pool, one end of the second resin catcher is connected with the separation tower, the negative tower and the positive tower, and the other end of the second resin catcher is connected with the plurality of recovery water pools.

In the specific implementation, in the process of recovering and treating the invalid resin by using the power station condensate polishing system, the type of the waste water can be determined according to the source, the treatment stage, the characteristics and the like of the waste water, and the first type of waste water with relatively poor water quality and the second type of waste water with relatively good water quality discharged by the power station condensate polishing system are separated; and the first resin catcher is specially responsible for accessing and filtering and recycling the resin in the first type of waste water, and the second resin catcher is specially responsible for accessing and filtering and recycling the resin in the second type of waste water. Further, the filtered first type wastewater can be conveyed to a preset wastewater pool through a first resin catcher; the second type of filtered wastewater is conveyed to the matched recovery water tanks through the second resin catcher according to different water quality grades, so that water in different recovery water tanks can be effectively and accurately reused in a step classification mode in a condensate fine treatment system of a power station according to specific conditions, the amount of wastewater finally discharged into the wastewater tanks can be effectively reduced, and the wastewater treatment cost is reduced; meanwhile, waste water with better water quality can be fully utilized, and the waste of resources is reduced.

In view of the above, the present specification provides, in particular, a wastewater treatment system for fine treatment of condensate from a power station. In particular, reference may be made to fig. 1. Besides the original power station condensed water fine treatment system, the system at least comprises: a first resin trap D1, a second resin trap D2, and a wastewater ladder utilization subsystem D3. The first resin catcher D1 and the second resin catcher D2 are respectively connected with a separation tower C, a negative tower B and a positive tower (combined grease storage tower) A in a condensed water fine treatment system of a power station through pipelines so as to be connected with different types of waste water discharged by different towers of the separation tower C, the negative tower B and the positive tower A in different treatment stages.

The first resin catcher D1 is used for accessing first type wastewater and filtering and recycling resin in the first type wastewater; the second resin catcher D2 is used for receiving the second type of waste water and filtering and recycling the resin in the second type of waste water. The first-class wastewater and the second-class wastewater are generated and discharged by the power station condensate fine treatment system in the process of recovering and treating the ineffective resin, and have different water quality types.

Referring to fig. 2, the wastewater ladder utilization subsystem D3 may include at least: a preset wastewater pool H and a plurality of recovery water pools. Wherein, a plurality of recovery pond can include 3 recovery ponds that correspond different quality of water grades.

Specifically, for example, the plurality of recovery water pools includes: a first-level water recovery tank E, a second-level water recovery tank F and a third-level water recovery tank G. The water quality grade of the water stored in the recovered water third-level water tank G is higher than that of the recovered water second-level water tank F, and the water quality grade of the water stored in the recovered water second-level water tank F is higher than that of the recovered water first-level water tank E.

Of course, it should be noted that the above-listed plurality of recovery water pools is only a schematic illustration. In specific implementation, according to specific situations and processing requirements, the plurality of recovery water tanks may further include two recovery water tanks, or four recovery water tanks, and other number of recovery water tanks.

The first resin catcher D1 can be connected with the preset wastewater pool H through a pipeline, and the filtered first type wastewater flowing out of the first resin catcher D1 is conveyed into the preset wastewater pool H through a pipeline;

the second resin catcher D2 may be connected to the plurality of recovery water tanks through pipes, and the filtered second type waste water flowing out of the second resin catcher D2 may be transferred to the corresponding recovery water tanks according to water quality grade.

The plurality of recovery water tanks are also respectively connected with a power station condensed water fine treatment system through a self-cleaning filter M and a first pipeline L11; a plurality of recycling water pumps are respectively arranged between the plurality of recovery water tanks and the self-cleaning filter M; the multiple reuse water pumps are used for pumping the water (namely the filtered second-type wastewater stored in the recovery water tank) in the recovery water tank meeting the preset use requirement according to the control instruction, filtering the water by the self-cleaning filter M and transmitting the water to the power station condensate polishing system for reuse through the first pipeline L11. Wherein, the water pumps that a plurality of retrieval and utilization water pumps and a plurality of recovery pond correspond respectively.

Specifically, for example, the plurality of reuse water pumps may include: reuse water pumps EA and EB corresponding to the first-stage recycled water pool E, reuse water pumps FA and FB corresponding to the second-stage recycled water pool F, and reuse water pumps GA and GB corresponding to the third-stage recycled water pool G.

Of course, it should be noted that the above-mentioned recycled water pump is only a schematic illustration. During specific implementation, according to specific conditions and treatment requirements, different numbers of recycling water pumps can be configured corresponding to different recycling water tanks. For example, the amount of water stored in the primary water-recovering pool is relatively large, and four different water reuse pumps, EA, EB, EC and ED, may be provided in the primary water-recovering pool. And the water quantity stored in the secondary water tank of the recovered water is relatively less, and a reuse water pump, namely GA and the like, can be arranged in the secondary water tank of the recovered water.

In this embodiment, in the process of recovering and treating (e.g. regenerating) the spent resin by using the condensate polishing system of the power station, the discharged wastewater is divided into different types of wastewater, i.e. a first type of wastewater with relatively poor water quality and a second type of wastewater with relatively good water quality, according to the source (e.g. whether the spent resin is discharged from a separation tower, a positive tower, or a negative tower), the treatment stage (e.g. whether the spent resin is washed in the separation tower, a rinsing stage before regeneration of the positive resin, etc.), and the wastewater characteristics (e.g. whether the wastewater has color, etc.), so that the wastewater with different water quality types can be separated for respectively performing targeted treatment. Further, for the first type of wastewater, a first resin catcher can be used to be specially responsible for filtering and recovering the resin in the first type of wastewater, and the first type of wastewater filtered by the first resin catcher is transported to a preset wastewater pond in the wastewater gradient utilization subsystem for acid-base neutralization treatment. Aiming at the second type of wastewater, the second resin catcher can be specially used for filtering and recovering the resin in the second type of wastewater, and the second type of wastewater filtered by the second resin catcher is conveyed to a matched recovery water tank in the wastewater gradient utilization subsystem, so that the second type of wastewater can be reused in the power station condensate fine treatment system through a reuse water pump and a self-cleaning filter according to specific conditions and use requirements. Thereby can reach the waste water volume that reduces to discharge in the effluent disposal basin, reduce the waste water treatment cost, effectively utilize the technical effect of the better waste water of quality of water, solve the unable waste water of utilizing the fine processing system exhaust of power station condensate water effectively that exists among the current system, technical problem that the waste water treatment cost is high.

In this embodiment, the filtered second-type wastewater flowing out of the second resin trap can be delivered to a corresponding recovery water tank of the plurality of recovery water tanks according to the corresponding water quality grade.

For example, the second type of filtered wastewater with the water quality grade of a preset third grade can be conveyed to a reclaimed water tertiary pond for storage; the filtered second-class wastewater with the water quality grade of a preset second grade can be conveyed to a reclaimed water secondary pool for storage; the filtered second-class wastewater with the water quality grade of the preset first grade can be conveyed to a reclaimed water tertiary pool for storage.

Wherein, the water quality grade can be determined according to the conductance value of the second type of wastewater after filtration.

Specifically, for example, if the conductance value in the filtered second type wastewater is equal to or less than the first threshold value (for example, 0.15 μ S/cm), the water quality grade of the filtered second type wastewater may be determined as the preset third grade. If the conductance value in the filtered second type wastewater is greater than the first threshold value and less than or equal to a second threshold value (for example, 5 μ S/cm), the water quality grade of the filtered second type wastewater can be determined as a preset second grade. And if the conductance value of the filtered second-type wastewater is greater than or equal to a second threshold value, determining the water quality grade of the filtered second-type wastewater as a preset first grade.

Through the mode, the second-class wastewater with relatively good water quality can be finely distinguished in one step based on the conductivity value and is respectively stored in different recovery water tanks, so that the second-class wastewater with different water quality grades can be more finely and accurately used in the following process.

In one embodiment, a water quality level detector DE and a plurality of pneumatic valves are further provided between the second resin trap and the plurality of recovery water tanks.

Wherein, the water quality grade detector can specifically comprise a conductivity detector. Of course, the water quality level detection may also include a combination of conductivity detector, turbidity detector and other detection devices. The plurality of pneumatic valves may specifically include control valves respectively corresponding to the plurality of recovery pools, for controlling the filtered second type wastewater to flow into the corresponding recovery pools.

Specifically, for example, the plurality of pneumatic valves may include: the pneumatic valve D22 from the flushing water corresponding to the recovered water primary pool E to the recovered water primary pool, the pneumatic valve D23 from the flushing water corresponding to the recovered water secondary pool F to the recovered water secondary pool, and the pneumatic valve D24 from the flushing water corresponding to the recovered water tertiary pool G to the recovered water tertiary pool.

In specific implementation, when the conductivity value of the filtered second-type wastewater is detected to be less than or equal to the first conductivity threshold (for example, 5 μ S/cm) through the water quality grade detection DE, the water quality grade of the filtered second-type wastewater can be determined to be a preset third grade. Furthermore, the system can open D21 and D24 by control, and the filtered second type wastewater is conveyed to a reclaimed water tertiary pond G for subsequent reuse.

When the conductance value of the filtered second type wastewater is detected to be equal to or less than a second conductance threshold value (for example, 15 μ S/cm) and greater than the first conductance threshold value by the water quality grade detection DE, it may be determined that the water quality grade of the filtered second type wastewater is the preset second grade. Furthermore, the system can open D21 and D23 by control, and the filtered second type wastewater is conveyed to the reclaimed water secondary pond F for subsequent reuse.

When the water quality grade detection DE detects that the conductance value of the filtered second-class wastewater is greater than the second conductance threshold value, the water quality grade of the filtered second-class wastewater can be determined to be the preset first grade. Furthermore, the system can open D21 and D22 by control, and the filtered second type wastewater is conveyed to a reclaimed water primary pond E for subsequent reuse.

In one embodiment, according to different treatment stages of different devices in the condensate fine treatment system of the power station in the process of recovering and treating the ineffective resin, water in the corresponding recovery water tank meeting the preset use requirement is extracted flexibly by controlling the reuse water pumps corresponding to different recovery water tanks according to different use requirements of water quality grades, and after being filtered by the self-cleaning filter, the water flows into the washing water inlet main pipe connected with the first pipeline through the first pipeline, so that the water is conveyed to the condensate fine treatment system of the power station for repeated use.

Specifically, for example, in the post-regeneration rinsing treatment stage of the cation resin of the cation tower, the service requirement of the water quality grade is a preset third grade, and water in a reclaimed water tertiary water tank can be extracted as water meeting the preset service requirement by controlling a reclaimed water pump of the reclaimed water tertiary water tank; and after being cleaned and filtered by the self-cleaning filter, the water is conveyed to a power station condensed water treatment system through a first pipeline to be treated into corresponding desalted water, and then the desalted water is conveyed to a cation tower to carry out rinsing treatment after cation resin regeneration.

In this embodiment, after the water extracted from the corresponding recovery water tank is filtered and cleaned by the self-cleaning filter, before the water is sent to the condensate polishing system of the power station through the first pipeline, the conductivity value and the turbidity value of the water after being cleaned and filtered may be detected again by the conductivity detector and the turbidity detector to determine whether the water after being filtered meets the preset use requirement. If it is determined that the preset usage requirements are met, the flow of water through the first conduit into the plant condensate polishing system may be controlled by controlling a pneumatic valve (e.g., M1) disposed on the first conduit. On the contrary, if the preset use requirement is determined not to be met, the water can be prevented from directly flowing into the condensate fine treatment system of the power station through the first pipeline by controlling the pneumatic valve on the first pipeline.

In this embodiment, in the case where the conductivity detector and the turbidity detector determine that the water does not meet the preset use requirement, the water may be further filtered and cleaned until the detected conductivity value and turbidity value meet the preset use requirement (for example, whether the conductivity value and turbidity value meet: the conductivity value is less than 0.15 μ S/cm, and the turbidity value is approximately equal to 0NTU) to control the pneumatic valve disposed on the first pipeline, so as to allow the water to flow into the condensate polishing system of the power station through the first pipeline for reuse.

In one embodiment, a second pipeline connected in parallel with the first pipeline can be connected after the conductivity detector and the turbidity detector. The second pipeline is connected with the boiler feed water raw water tank, and the second pipeline is used for conveying water with the water quality which does not meet the preset use requirement and flows out of the self-cleaning filter to the boiler feed water raw water tank, and the water is reused after being correspondingly treated.

In the embodiment, under the condition that the conductivity detector and the turbidity detector determine that the water does not meet the preset use requirement, the pneumatic valve on the first pipeline is controlled to prevent the water from directly flowing into the condensate fine treatment system of the power station through the first pipeline, and meanwhile, the pneumatic valve (M2) on the second pipeline can be controlled to enable the water to flow into the boiler make-up water raw water tank connected with the second pipeline through the second pipeline. Wherein, the requirement of the boiler make-up water raw water on the water quality grade is often lower than that of a power station condensed water fine treatment system.

Correspondingly, although the water which does not meet the preset use requirement cannot flow into the condensed water fine treatment system of the power station for repeated use, the water can flow into the boiler feed water raw water tank and be repeatedly used after being correspondingly treated. Thereby effectively utilizing the waste water resource and reducing the waste of the resource.

In this embodiment, the types of wastewater may specifically include a first type of wastewater and a second type of wastewater. The first type of wastewater is specifically understood to be wastewater which has relatively poor water quality and cannot be reused after being simply treated. The second type of wastewater is specifically understood to be wastewater which has relatively good water quality and can be reused after being simply treated.

In this embodiment, each time there is wastewater discharged from the power station condensate polishing system, the wastewater type detector is triggered to collect one or more of the following information relating to the wastewater: the source of the wastewater, the characteristics of the wastewater and the treatment stage; and then can be according to above-mentioned information, confirm the type of waste water belongs to first type waste water or second waste water to can be with the waste water separation of different quality of water types. So that corresponding valves and pipelines can be triggered and controlled according to the type of the wastewater, and the wastewater flows into a resin catcher matched with the type of the wastewater for subsequent treatment.

Wherein the characteristic of the wastewater may specifically comprise the color of the wastewater. The source of the waste water is understood to mean in particular which of the separation column, the negative column and the positive column the waste water is discharged from.

In one embodiment, in the case that the wastewater is determined to be the first type wastewater by the wastewater type detector, the system may switch to use the first resin catcher to access the discharged first type wastewater by controlling the opening D11, D12, and recycle and filter the resin in the first type wastewater to obtain filtered first type wastewater; and then conveying the filtered first-class wastewater to a preset wastewater pool. Under the condition that the wastewater is determined to be the second type of wastewater by the wastewater type detector, the system can switch to use the second resin catcher to access the discharged second type of wastewater by controlling to open D21, and the resin in the second type of wastewater is recycled and filtered to obtain the filtered second type of wastewater; and then conveying the filtered second-class wastewater to a recovery water tank.

In one embodiment, the wastewater type detector determines the wastewater type specifically, for example, in the case where the source of the wastewater is determined to be a separation column, the treatment stage is a stage in which the spent resin is washed in the separation column, and the color of the wastewater is colored, the wastewater is determined to be the first type of wastewater. And determining the wastewater as the second type wastewater under the condition that the source of the wastewater is determined to be a separation tower, the treatment stage is a stage in which the invalid resin is washed in the separation tower, and the color of the wastewater is colorless. And determining the wastewater as a second type of wastewater after determining that the source of the wastewater is the positive tower and the treatment stage is the rinsing stage before the regeneration of the positive resin. And determining the wastewater as a second type of wastewater after determining that the source of the wastewater is a negative tower and the treatment stage is a rinsing stage before regeneration of negative resin. And determining the waste water as the second type of waste water when determining that the source of the waste water is a separation tower and the treatment stage is the separation and output stage of the invalid resin in the separation tower. And determining the wastewater as the first type wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is the stages of pre-spraying, regeneration, displacement flushing and the like in the regeneration step of the positive resin in the positive tower and grease storage tower. And determining the wastewater as the first type wastewater when determining that the source of the wastewater is a negative tower and the treatment stage is the stages of pre-spraying, regeneration, displacement flushing and the like in the regeneration step of the positive resin in the positive tower and the grease storage tower. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is a rinsing stage after the regeneration of the positive resin. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is a rinsing stage after the regeneration of the positive resin. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a negative tower and the treatment stage is a rinsing stage after the regeneration of negative resin. And determining the source of the wastewater as a positive tower, the treatment stage as a flushing conductance stage after the positive resin is regenerated, and determining the wastewater as a second type of wastewater. And determining the source of the wastewater as a positive tower, the treatment stage as a flushing conductance stage after the regeneration of the negative resin, and determining the wastewater as a second type of wastewater. And determining the wastewater as a second type wastewater after determining the source of the wastewater as a positive tower, the treatment stage as a negative resin conveying stage and a fat mixing stage. And determining the source of the wastewater as a negative tower, and determining the wastewater as a second type of wastewater in a flushing conductance stage after the negative resin is regenerated. And determining the source of the wastewater as a positive tower, the treatment stage as a mixed-fat conductive flushing stage, and determining the wastewater as a second type of wastewater. And determining the wastewater as a second type of wastewater after determining the source of the wastewater as a positive tower and the treatment stage as a regeneration system cation resin supplementing stage. And determining the wastewater as a second type of wastewater after determining that the source of the wastewater is a negative tower and the treatment stage is a regeneration system negative resin supplementing stage.

In one embodiment, considering that the second type of wastewater flowing into the plurality of recovery ponds is generally separated, the amount of water having a predetermined first quality level tends to be greater than the amount of water having a predetermined second quality level, and the amount of water having a predetermined second quality level tends to be greater than the amount of water having a predetermined third quality level. However, in the process of actually applying the condensate polishing system of the power station, water with a water quality grade of a preset second grade and a preset third grade is often used more.

In view of the above, in this embodiment, a third pipeline is further connected between the reuse water pump of the recycled water primary tank and the recycled water secondary tank, and a filter and a water quality level detector are further connected to the third pipeline. Under the condition that the water quantity stored in the first-level recycled water pool is large, a valve between a recycling water pump of the first-level recycled water pool and the self-cleaning filter can be closed, a valve on the third pipeline and the recycling water pump of the first-level recycled water pool are opened, so that the water in the first-level recycled water pool can be pumped to the third pipeline, the filter is used for further filtering treatment, the conductance value in the water is reduced, and the water can flow into the second-level recycled water pool when the water quality is detected and determined to reach the preset second level by the water quality level detector.

Similarly, a fourth pipeline is connected between the reuse water pump of the reclaimed water secondary pond and the reclaimed water tertiary pond, and a filter and a water quality grade detector are also connected to the fourth pipeline. Under the condition that the water quantity stored in the recycled water secondary pond is more, a valve between a recycling water pump of the recycled water secondary pond and the self-cleaning filter can be closed, a valve on the fourth pipeline and the recycling water pump of the recycled water secondary pond are opened, so that water in the recycled water secondary pond can be pumped to the fourth pipeline, the filter is used for further filtering treatment, the electric conductivity value of the water is reduced, and the water can flow into the recycled water tertiary pond when the water quality level detector detects and determines that the water quality reaches the preset third level.

Based on the wastewater treatment system for the fine treatment of the power station condensate provided by the specification, a first resin catcher, a second resin catcher and a wastewater step utilization subsystem are additionally arranged and connected outside the original power station condensate fine treatment system comprising a separation tower, a negative tower and a positive tower, and specifically, the first resin catcher and the second resin catcher are respectively connected with the separation tower, the negative tower and the positive tower so as to access different types of wastewater discharged by different towers in different treatment stages; the first resin catcher is connected with a preset wastewater pool in the wastewater step utilization subsystem, and the second resin catcher is connected with a plurality of different recovery water pools in the wastewater step utilization subsystem; and the different recovery water tanks are connected with a power station condensed water fine treatment system sequentially through the self-cleaning filter and the first pipeline. During specific implementation, the type of the wastewater can be determined according to the source of the wastewater, the treatment stage and the characteristics of the wastewater, and the first type of wastewater with relatively poor water quality and the second type of wastewater with relatively good water quality discharged by the power station condensate fine treatment system are separated; and the first resin catcher is specially responsible for accessing and filtering and recycling the resin in the first type of waste water, and the second resin catcher is specially responsible for accessing and filtering and recycling the resin in the second type of waste water. Further, the filtered first type wastewater can be conveyed to a preset wastewater pool through a first resin catcher; carry the second type waste water after will filtering to assorted recovery pond according to the difference of quality of water grade through the second resin trapper, so that follow-up can be according to the concrete condition in the smart processing system of power station condensate water accurate, the water in the different recovery pond of multiplexing effectively, thereby reach the waste water volume that reduces to discharge in the waste water pond, reduce the waste water treatment cost, effectively utilize the technological effect of the better waste water of quality of water, the waste water that can't utilize the smart processing system of power station condensate water discharge effectively that exists among the current system has been solved, the technical problem that the waste water treatment cost is high.

Referring to fig. 3, the present specification also provides a wastewater treatment method for power station condensate polishing using the wastewater treatment system for power station condensate polishing. In particular implementations, the method may include the following.

S301: determining the source, the treatment stage or the characteristics of the wastewater discharged by a power station condensed water fine treatment system;

s302: determining the type of the wastewater according to the source of the wastewater, the treatment stage or the characteristics of the wastewater;

s303: under the condition that the wastewater is determined to be second type wastewater, a second resin catcher is switched to be used for filtering and recovering resin in the second type wastewater to obtain filtered second type wastewater;

s304: determining the water quality grade of the filtered second-class wastewater;

s305: determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-class wastewater;

s306: and conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

In one embodiment, the determining the type of the wastewater according to the source of the wastewater, the treatment stage, or the characteristics of the wastewater may include the following steps: determining the wastewater as a first type of wastewater under the condition that the source of the wastewater is determined to be a separation tower, the treatment stage is a stage in which the invalid resin is washed in the separation tower, and the color of the wastewater is colored; determining the wastewater as a second type of wastewater under the conditions that the source of the wastewater is determined to be a separation tower, the treatment stage is a stage in which the spent resin is washed in the separation tower, and the color of the wastewater is colorless; determining the wastewater to be a second type wastewater after determining the source of the wastewater to be a positive tower and the treatment stage to be a rinsing stage before regeneration of positive resin; and determining the wastewater as a second type of wastewater after determining that the source of the wastewater is a negative tower and the treatment stage is a rinsing stage before regeneration of negative resin. Of course, the manner in which the type of wastewater is determined as set forth above is merely illustrative.

Specifically, the determining the type of the wastewater according to the source of the wastewater, the treatment stage, or the characteristics of the wastewater may further include the following steps: and determining the waste water as the second type of waste water when determining that the source of the waste water is a separation tower and the treatment stage is the separation and output stage of the invalid resin in the separation tower. And determining the wastewater as the first type wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is the stages of pre-spraying, regeneration, displacement flushing and the like in the regeneration step of the positive resin in the positive tower and grease storage tower. And determining the wastewater as the first type wastewater when determining that the source of the wastewater is a negative tower and the treatment stage is the stages of pre-spraying, regeneration, displacement flushing and the like in the regeneration step of the positive resin in the positive tower and the grease storage tower. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is a rinsing stage after the regeneration of the positive resin. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a positive tower and the treatment stage is a rinsing stage after the regeneration of the positive resin. And determining the wastewater as a second type of wastewater when determining that the source of the wastewater is a negative tower and the treatment stage is a rinsing stage after the regeneration of negative resin. And determining the source of the wastewater as a positive tower, the treatment stage as a flushing conductance stage after the positive resin is regenerated, and determining the wastewater as a second type of wastewater. And determining the source of the wastewater as a positive tower, the treatment stage as a flushing conductance stage after the regeneration of the negative resin, and determining the wastewater as a second type of wastewater. And determining the wastewater as a second type wastewater after determining the source of the wastewater as a positive tower, the treatment stage as a negative resin conveying stage and a fat mixing stage. And determining the source of the wastewater as a negative tower, and determining the wastewater as a second type of wastewater in a flushing conductance stage after the negative resin is regenerated. And determining the source of the wastewater as a positive tower, the treatment stage as a mixed-fat conductive flushing stage, and determining the wastewater as a second type of wastewater. And determining the wastewater as a second type of wastewater after determining the source of the wastewater as a positive tower and the treatment stage as a regeneration system cation resin supplementing stage. And determining the source of the wastewater as a negative tower, the treatment stage as a regeneration system negative resin supplementing stage, and the wastewater as a second type of wastewater.

In an embodiment, when the method is implemented, the following may be further included: under the condition that the wastewater is determined to be first-class wastewater, a first resin catcher is switched to be used for filtering and recovering resin in the first-class wastewater, and the filtered first-class wastewater is obtained; and conveying the filtered first-class wastewater to a wastewater pool preset in a wastewater step utilization subsystem.

Specifically, the first resin trap can be switched to use by opening D11 and D12. The second resin trap is used by opening D21 and switching one of D22, D23, D24. Wherein, which one of the D22, D23 and D24 is specifically opened can be determined according to the water quality grade.

For example, in the case where the water quality level is determined to be a preset second level, D21 and D22 may be opened, the second resin trap may be switched to use, and the filtered second type wastewater flowing out of the second resin trap may be transferred to the reclaimed water primary tank. In the case that the water quality level is determined to be a preset second level, D21 and D23 can be opened, the second resin catcher is switched to use, and the filtered second-type wastewater flowing out of the second resin catcher is conveyed to the reclaimed water secondary pond. In the case that the water quality grade is determined to be a preset second grade, D21 and D24 can be opened, the second resin catcher is switched to use, and the filtered second-type wastewater flowing out of the second resin catcher is conveyed to the reclaimed water tertiary pond.

In an embodiment, when the method is implemented, the following may be further included: according to the preset use requirements of different equipment in the condensate fine treatment system of the power station in different treatment stages, water (namely the second type of filtered wastewater with better water quality) stored in the recovery water tank is extracted through a matched recovery water pump of the recovery water tank, and the water is cleaned and filtered by a self-cleaning filter and then is conveyed to corresponding equipment in the condensate fine treatment system of the power station through a first pipeline for reuse.

In one embodiment, the water fed in via the first line may be treated relatively simply to obtain the corresponding desalinated water, which is then fed to the corresponding apparatus for reuse in the corresponding treatment phase.

In one embodiment, in the case that the currently operating equipment is determined to be the separation tower, and the treatment stage is the washing stage of the failed resin in the separation tower, the system can be used for pumping the water in the recycled water primary water tank by starting a recycled water pump (EA or EB) of the recycled water primary water tank, cleaning and filtering the water by a self-cleaning filter M1, and then controlling corresponding valves to be conveyed to the separation tower in the condensate polishing system of the power station through a first pipeline for reuse.

Under the condition that the current operation equipment is determined to be a positive tower, and the treatment stage is a rinsing stage before regeneration of the positive resin, based on the system, water in the recovered water primary water tank can be extracted by starting a reuse water pump (EA or EB) of the recovered water primary water tank, and after being cleaned and filtered by a self-cleaning filter M1, the corresponding valve is controlled to be conveyed to the positive tower in the condensate fine treatment system of the power station through a first pipeline for reuse.

Under the condition that the current operation equipment is determined to be a negative tower and the treatment stage is a rinsing stage before regeneration of negative resin, based on the system, water in the recovered water primary water tank can be extracted by starting a reuse water pump (EA or EB) of the recovered water primary water tank, and after being cleaned and filtered by a self-cleaning filter M1, the corresponding valve is controlled to be conveyed to the negative tower in the condensate fine treatment system of the power station through a first pipeline for reuse.

In one embodiment, in the case of a large amount of water stored in the primary reclaimed water tank, the amount of water in the primary reclaimed water tank can be stabilized by opening the reuse water pump of the primary reclaimed water tank and the valve (e.g., M2) of the second line to discharge the water in the primary reclaimed water tank to the primary boiler makeup water tank through the second line. Similarly, under the condition that the water quantity stored in the secondary water tank of the recovered water is more, the water in the secondary water tank of the recovered water can be discharged into the primary water tank of the boiler supply water through the second pipeline by opening the reuse water pump of the secondary water tank of the recovered water and the valve of the second pipeline so as to stabilize the water quantity in the secondary water tank of the recovered water. Under the more circumstances of the water yield of storage in the tertiary pond of recovered water, can also be through opening the retrieval and utilization water pump in the tertiary pond of recovered water to and the valve of second pipeline, discharge the water in the tertiary pond of recovered water to the boiler make-up water former pond through the second pipeline, with the water yield in the tertiary pond of stable recovered water. Therefore, the stability and the safety of the integral operation of the system can be ensured.

The method for treating the wastewater of the fine treatment of the condensed water of the power station comprises the steps of determining the type of the wastewater according to the source, the treatment stage and the characteristics of the wastewater, and separating first wastewater with relatively poor water quality and second wastewater with relatively good water quality which are discharged by a fine treatment system of the condensed water of the power station; and the first resin catcher is specially responsible for accessing and filtering and recycling the resin in the first type of waste water, and the second resin catcher is specially responsible for accessing and filtering and recycling the resin in the second type of waste water. Further, the filtered first type wastewater can be conveyed to a preset wastewater pool through a first resin catcher; carry the second type waste water after will filtering to assorted recovery pond according to the difference of quality of water grade through the second resin trapper, so that follow-up can be according to the concrete condition in the smart processing system of power station condensate water accurate, the water in the different recovery pond of multiplexing effectively, thereby reach the waste water volume that reduces to discharge in the waste water pond, reduce the waste water treatment cost, effectively utilize the technological effect of the better waste water of quality of water, the waste water that can't utilize the smart processing system of power station condensate water discharge effectively that exists among the current system has been solved, the technical problem that the waste water treatment cost is high.

Embodiments of the present specification further provide a server, including a processor and a memory for storing processor-executable instructions, where the processor, when implemented, may perform the following steps according to the instructions: determining the source, the treatment stage or the characteristics of the wastewater discharged by a power station condensed water fine treatment system; determining the type of the wastewater according to the source of the wastewater, the treatment stage or the characteristics of the wastewater; under the condition that the wastewater is determined to be second type wastewater, a second resin catcher is switched to be used for filtering and recovering resin in the second type wastewater to obtain filtered second type wastewater; determining the water quality grade of the filtered second-class wastewater; determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-class wastewater; and conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

In order to more accurately complete the above instructions, referring to fig. 4, another specific server is provided in the embodiments of the present specification, wherein the server includes a network communication port 401, a processor 402, and a memory 403, and the above structures are connected by an internal cable, so that the structures may perform specific data interaction.

The network communication port 401 may be specifically configured to collect information about a source, a treatment stage, characteristics of wastewater, and the like of wastewater discharged by the condensate polishing system of the power station.

The processor 402 may be specifically configured to determine the type of wastewater according to the source of the wastewater, the treatment stage, or the characteristics of the wastewater; under the condition that the wastewater is determined to be second type wastewater, a second resin catcher is switched to be used for filtering and recovering resin in the second type wastewater to obtain filtered second type wastewater; determining the water quality grade of the filtered second-class wastewater; determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-class wastewater; and conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

The memory 403 may be specifically configured to store a corresponding instruction program.

In this embodiment, the network communication port 401 may be a virtual port that is bound to different communication protocols, so that different data can be sent or received. For example, the network communication port may be a port responsible for web data communication, a port responsible for FTP data communication, or a port responsible for mail data communication. In addition, the network communication port can also be a communication interface or a communication chip of an entity. For example, it may be a wireless mobile network communication chip, such as GSM, CDMA, etc.; it can also be a Wifi chip; it may also be a bluetooth chip.

In this embodiment, the processor 402 may be implemented in any suitable manner. For example, the processor may take the form of, for example, a microprocessor or processor and a computer-readable medium that stores computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an Application Specific Integrated Circuit (ASIC), a programmable logic controller, an embedded microcontroller, and so forth. The description is not intended to be limiting.

In this embodiment, the memory 403 may include multiple layers, and in a digital system, the memory may be any memory as long as binary data can be stored; in an integrated circuit, a circuit without a physical form and with a storage function is also called a memory, such as a RAM, a FIFO and the like; in the system, the storage device in physical form is also called a memory, such as a memory bank, a TF card and the like.

The embodiment of the specification also provides a computer storage medium of the wastewater treatment method based on the power station condensate fine treatment, the computer storage medium stores computer program instructions, and when the computer program instructions are executed, the computer storage medium realizes that: determining the source, the treatment stage or the characteristics of the wastewater discharged by a power station condensed water fine treatment system; determining the type of the wastewater according to the source of the wastewater, the treatment stage or the characteristics of the wastewater; under the condition that the wastewater is determined to be second type wastewater, a second resin catcher is switched to be used for filtering and recovering resin in the second type wastewater to obtain filtered second type wastewater; determining the water quality grade of the filtered second-class wastewater; determining a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-class wastewater; and conveying the filtered second-class wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

In this embodiment, the storage medium includes, but is not limited to, a Random Access Memory (RAM), a Read-Only Memory (ROM), a Cache (Cache), a Hard Disk Drive (HDD), or a Memory Card (Memory Card). The memory may be used to store computer program instructions. The network communication unit may be an interface for performing network connection communication, which is set in accordance with a standard prescribed by a communication protocol.

In this embodiment, the functions and effects specifically realized by the program instructions stored in the computer storage medium can be explained by comparing with other embodiments, and are not described herein again.

Referring to fig. 5, on the software level, the embodiment of the present specification further provides a wastewater treatment device for fine treatment of condensed water of a power station, and the device may specifically include the following structural modules.

The first determining module 501 may be specifically configured to determine a source, a treatment stage, or characteristics of wastewater discharged by a condensate polishing system of a power station;

the second determining module 502 may be specifically configured to determine the type of the wastewater according to the source of the wastewater, the treatment stage, or the characteristics of the wastewater;

the filtering and recycling module 503 is specifically configured to, when it is determined that the wastewater is the second type of wastewater, switch to use a second resin catcher to filter and recycle the resin in the second type of wastewater, so as to obtain filtered second type of wastewater;

a third determining module 504, which may be specifically configured to determine the water quality level of the filtered second-type wastewater;

the fourth determining module 505 may be specifically configured to determine a matched recovery water tank in the wastewater step utilization subsystem according to the water quality grade of the filtered second-type wastewater;

the conveying module 506 may be specifically configured to convey the filtered second-type wastewater to a matched recovery water tank in the wastewater step utilization subsystem for reuse.

It should be noted that, the units, devices, modules, etc. illustrated in the above embodiments may be implemented by a computer chip or an entity, or implemented by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. It is to be understood that, in implementing the present specification, functions of each module may be implemented in one or more pieces of software and/or hardware, or a module that implements the same function may be implemented by a combination of a plurality of sub-modules or sub-units, or the like. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

It can be seen from above that, based on the waste water treatment facilities of the smart processing of power station condensate that this specification embodiment provided, can reach the waste water volume that reduces to discharge in the effluent water sump, reduce the waste water treatment cost, effectively utilize the technical effect of the better waste water of quality of water, solved the unable waste water of utilizing power station condensate smart processing system exhaust effectively that exists among the current system, technical problem that the waste water treatment cost is high.

In a specific scenario example, the wastewater treatment system for the condensate polishing of the power station provided in the present specification may be applied to perform polishing treatment on wastewater discharged from the condensate polishing system of the power station, so as to make full use of the wastewater. The specific implementation process can be executed by referring to the following contents.

Referring specifically to fig. 1, the reuse system for recycling the condensate from the power station (i.e., the wastewater treatment system for the condensate from the power station) includes: an acid-base waste liquid resin trap D1 (i.e., a first resin trap), a rinsing water resin trap D2 (i.e., a second resin trap). It should be noted that a resin catcher is additionally arranged in the multiplexing system, so that acid-base waste liquid (for example, first type waste water) generated during regeneration of the anion-cation resin can enter a waste water tank through the acid-base waste liquid resin catcher D1; the resin rinse, resin transfer process water (e.g., second type waste water) may then be flushed through the water resin trap D2 into a reuse tank (e.g., a recovery tank). Therefore, the acid-base regeneration process and the resin washing and rinsing process can be realized without mutual interference of drainage (the wastewater with different water quality types is separated).

In addition, the original configuration of the separation tower, the negative tower, the positive tower and the grease storage tower, the auxiliary pipelines and valves realizes the functions of conveying, separating, regenerating and replacing the negative and positive resins. A pneumatic valve D11 also added to the wastewater basin (i.e., the pre-set wastewater basin) F, a pneumatic valve D21 to the reuse basin (i.e., the reclaimed water primary basin) E, and a pneumatic valve M2; when the washing water is unqualified or the reused water pool E, F, H is in a high water level, the washing water can be discharged to the boiler feed water raw water pool by opening the pneumatic valve M2.

A reuse water pool E, F, H pool in the step utilization system (i.e., waste water step utilization subsystem) is also added. Referring to fig. 2, each water pool is provided with two reuse water pumps (or called reuse water pumps) to realize storage, reuse and discharge of reuse water at different stages. A, B two waste water pumps are arranged at the waste water tank to realize the storage and discharge of acid-base containing waste water.

And a self-cleaning filter M is additionally arranged, wherein the filtering precision is 100 mu M, metal corrosion products, broken resin and part of suspended impurities in the reuse water can be treated, the reuse water enters a system for use after the treatment, the indexes such as the amount of suspended matters are controlled within a reasonable range, if the turbidity is not qualified after the treatment of the self-cleaning filter, the unqualified reuse water M2 is jointly started to be a pneumatic valve of the boiler water supply raw water tank, and the unqualified water is recovered to the boiler water supply raw water tank. And a conductivity meter DD (namely a conductivity detector) is additionally arranged in the system, wherein the measuring range is 0-100 mu S/cm, and the conductivity meter DD is arranged on an outlet pipeline of the multiplexing water pump to realize the monitoring of the conductivity of the multiplexing water. A turbidity meter NTU (namely a turbidity detector) is additionally arranged in the system, wherein the measuring range is 0-5NTU, and the device is arranged on an outlet pipeline of the multiplexing water pump to realize the monitoring of the turbidity of the multiplexing water. And a liquid level meter LS is additionally arranged, wherein the measuring range is 0-10m, and the liquid level meter LS is used for measuring the liquid levels of the multiplexing water pool and the waste water pool. The gauge may in particular be an ultrasonic gauge.

The implementation of ladder utilization. Specifically, the system drainage can be divided into four levels according to the actual condition of the system operation: (1) direct discharge grades (i.e., first type wastewater), including: water for acid-base regeneration of cation and anion resin, water for rinsing spent resin in a separation tower (if clear, can be recovered according to 'recoverable first-grade'), and the like; (2) one stage can be recovered (i.e., a second type of wastewater with a water quality rating of a preset first rating): conductance was expected to be <15 μ S/cm. Recovering water for resin separation in the separation column, water for transferring resin from the separation column to the cation and anion columns, water for rinsing before regeneration of resin in the cation and anion columns, and water for rinsing after regeneration of resin in the cation and anion columns; (3) secondary (i.e., a second type of wastewater having a water quality rating of a predetermined second rating) can be recovered: conductance was expected to be <5 μ S/cm. Recovering water for flushing conductivity of regenerated cation and anion resin, water for conveying anion resin to cation tower, and water for mixing resin; (4) three levels (i.e., a second type of wastewater with a water quality level of a preset third level) can be recovered: the conductance was expected to be < 0.1. mu.S/cm. The conductivity is recovered by washing with water or the like.

When in use, a water source of a certain grade can only supply water for the same grade process or the previous grade process. The process is monitored by a conductivity meter and a turbidity meter at the outlet of the self-cleaning filter G.

When the system is used specifically, the system can be used for treating wastewater in different conditions in a differentiated mode.

In case one, the spent resin is in the separation column wash sequence (i.e., the spent resin is in the separation column wash stage): the process can be provided with a 'recoverable' button and a 'non-recoverable' button for selection, and the recovery can be carried out if the flushing water is colorless through color judgment.

When the situation that the water cannot be recycled is realized, when a CQ1 top emptying valve, a CQ6 upper water discharging pneumatic valve and a CQ5 lower water discharging pneumatic valve of the separation tower are started, an acid-base water discharging pneumatic valve D11 and a pneumatic valve D12 to a preset wastewater pond are required to be started in a linked mode, a first-stage reuse water pump (EA or EB) is started in a linked mode, qualified reuse water is sent to a flushing pipeline pneumatic valve M1, and valves to be started in corresponding steps are started;

when the 'recoverable' valve is opened, the pneumatic valves CQ1, CQ6 and CQ5 are opened, the pneumatic valves D21 and D22 are connected, the first-stage reuse water pump (EA or EB) and the pneumatic valve M1 are started in parallel, and the valve to be opened in the corresponding step sequence is opened.

Case two, the separation and output sequence of the spent resin in the separation column: when the pneumatic valves CQ1, CQ5, CQ7 and CQ8 are opened, the pneumatic valves D21 and D22 are required to be connected, a first-stage reuse water pump (EA or EB) and the pneumatic valve M1 are started in parallel, and valves to be opened in corresponding steps are opened.

Case three, in the rinsing step before cation resin regeneration: when the pneumatic valves AQ2, AQ5 and AQ6 are opened, the valves D21 and D22, a secondary reuse water pump (FA or FB) and a pneumatic valve M1 are required to be started in a parallel mode, and the valves to be started in the corresponding steps are started.

Case four, in the rinsing step before regeneration of the negative resin: and valves and pipelines of the negative and positive regeneration towers are configured consistently, the step sequence is the same, and the reference condition is three.

In case five, the regeneration step of the cation resin in the cation tower and fat storage tower is as follows: the steps of pre-injection, regeneration, replacement flushing and the like relate to the steps of starting pneumatic valves AQ2, AQ5 and AQ6, wherein D11 and D12 are required to be started in a combined mode, a three-level reuse water pump (GA or GB) and a pneumatic valve M1 are required to be started in a parallel mode, and valves to be started in the corresponding steps are started. The effluent of the self-cleaning filter in the process needs to meet the conditions that the conductance is less than 0.15 mu S/cm and the turbidity is approximately equal to 0 NTU.

Case six, in the regeneration step of the negative resin in the negative column: the valves and pipelines of the negative and positive regeneration towers are configured consistently, the regeneration steps are the same, and the reference condition is five.

Case seven, in the post-cation resin regeneration rinsing step: when the pneumatic valves AQ2, AQ5 and AQ6 are opened, the valves D21 and D22, the three-stage reuse water pump (GA or GB) and the pneumatic valve M1 are required to be started in parallel, and the valves to be started in corresponding steps are started. The effluent of the self-cleaning filter in the process needs to meet the conditions that the conductance is less than 0.15 mu S/cm and the turbidity is approximately equal to 0 NTU.

Case eight, in the rinsing step after regeneration of the negative resin: the valves and pipelines of the negative and positive regeneration towers are configured in a consistent way, the step sequence is the same, and the reference condition is seven.

Nine cases, wash conductive step after cation resin regeneration: when the AQ2, the AQ5 and the AQ6 are opened, the D21 and the D23 are required to be started in a combined mode, a three-level reuse water pump (GA or GB) and a pneumatic valve M1 are started in a parallel mode, and valves to be opened in corresponding steps are started. The effluent of the self-cleaning filter in the process needs to meet the conditions that the conductance is less than 0.15 mu S/cm and the turbidity is approximately equal to 0 NTU. If the water quality is not qualified or the water source is insufficient, the water replenishing is completed by switching to a demineralized water system to replenish the rinsing water main pipe.

In case ten, the negative resin is regenerated and then washed in the conductance step: the valves and pipelines of the negative and positive regeneration towers are configured in a consistent way, the steps are the same, and the reference condition is nine.

In case eleven, the negative resin is conveyed to the positive column and in the step sequence of mixing the fat: when the AQ2, the AQ5, the AQ6 and the BQ5 are opened, the D21 and the D23 are required to be jointly started, the three-level reuse water pump (GA or GB) and the pneumatic valve M1 are started in parallel, and valves to be opened in corresponding steps are opened. The effluent of the self-cleaning filter in the process needs to meet the conditions that the conductance is less than 0.15 mu S/cm and the turbidity is approximately equal to 0 NTU. If the water quality is not qualified or the water source is insufficient, the water replenishing is completed by switching to a demineralized water system to replenish the rinsing water main pipe.

Case twelve, conductive flushing step of fat mixing: when the AQ2, the AQ5 and the AQ6 are opened, the D21 and the D24 are required to be started in a combined mode, a three-level reuse water pump (GA or GB) and a pneumatic valve M1 are started in a parallel mode, and valves to be opened in corresponding steps are started. The effluent of the self-cleaning filter in the process needs to meet the conditions that the conductance is less than 0.15 mu S/cm and the turbidity is approximately equal to 0 NTU. If the water quality is not qualified or the water source is insufficient, the water replenishing is completed by switching to a demineralized water system to replenish the rinsing water main pipe.

In case thirteen, when the regeneration system is replenished with resin (taking cation resin replenishment as an example): the AS1, AQ5, AQ6, D21 and D21 are started, at the moment, a secondary reuse water pump (FA or FB) and a pneumatic valve M1 are started, and valves to be started in corresponding steps are started to establish a flushing loop.

And in the fourteen conditions, when the conductivity and turbidity of the outlet water of the reuse water pump are qualified, reuse water is recycled (to the original system, namely the power station condensate fine treatment system) through a main pipe of a fine treatment flushing pipeline of a connecting pipeline, and when the reuse water is unqualified, the reuse water is recycled to a raw water tank of a boiler make-up water system and is used as a water source of the boiler make-up water system.

And in a fifteenth condition, when the liquid level of the wastewater pool is lower than a certain lower limit value or higher than a certain upper limit value, the automatic start and stop can be realized by controlling the HA pump and the HB pump of the wastewater pump, the H1 at the outlet of the pump is jointly started during the start, the corresponding S41 or S42 is manually started, and the wastewater is drained to a regular wastewater pool for treatment.

And in the sixteen cases, when the liquid levels of the first-stage reuse water tank E, the second-stage reuse water tank F and the third-stage reuse water tank G are lower than a certain lower limit value or higher than a certain upper limit value, the corresponding reuse water pumps are used for starting and stopping protection.

Taking the high liquid level of the secondary reuse water tank as an example for a sixteenth situation, when the system drainage needs to be recovered to the secondary reuse water tank, if the primary reuse water tank is at a low liquid level, the system drainage is discharged to the primary reuse water tank; if the primary reuse water pool is at a high liquid level, the M2 is jointly started and enters a boiler make-up water treatment system.

Taking the low liquid level of the primary reuse water tank as an example, when the primary reuse water tank is at the low liquid level, if the water level of the secondary reuse water tank is normal, the secondary reuse water pump is started in a linked manner to complete the step operation; and if the liquid level of the second-level reuse water tank is also at a low liquid level and the liquid level of the third-level reuse water tank is normal, starting the third-level reuse water pump in a linked manner.

Through the scene example, the reuse system for the fine treatment of the regeneration water by the condensate water of the power station is verified, the waste water with better water quality generated in the steps of resin transmission, separation, backwashing, flushing and the like in the regeneration process can be effectively separated from the waste water rich in alkali-containing impurity ions generated in the steps of acid-base regeneration, replacement, quick rinsing and the like in the regeneration process of an anion regeneration tower and a cation regeneration tower, and the waste water is respectively recycled to a reuse water pool and a waste water pool. The reuse of the fine treatment regeneration washing water is realized by the water of the reuse tank, and the water of the waste water tank is directly discharged to an infrequent waste water tank for acid-base neutralization. Taking a 350MW unit as an example, if a power station fine treatment regeneration water reuse system is adopted, about 350 tons of desalted water can be saved in each regeneration, the economic benefit is very high, and after the reuse water is separated from the acid-base wastewater, the reuse water is recycled to a boiler make-up water system while the operation pressure of an industrial wastewater system is reduced, the cascade utilization of water resources is realized, and the social benefit is good.

Although the present specification provides method steps as described in the examples or flowcharts, additional or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) according to the embodiments or methods shown in the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded. The terms first, second, etc. are used to denote names, but not any particular order.

Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.

This description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

From the above description of the embodiments, it is clear to those skilled in the art that the present specification can be implemented by software plus necessary general hardware platform. With this understanding, the technical solutions in the present specification may be essentially embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments in the present specification.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The description is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.

While the specification has been described with examples, those skilled in the art will appreciate that there are numerous variations and permutations of the specification that do not depart from the spirit of the specification, and it is intended that the appended claims include such variations and modifications that do not depart from the spirit of the specification.

Claims

1. A wastewater treatment system for the polishing of condensate from power stations, said system comprising at least: a first resin trap, a second resin trap, and a wastewater ladder utilization subsystem; wherein the content of the first and second substances,

the plurality of recovery water tanks are also respectively connected with a power station condensed water fine treatment system through a self-cleaning filter and a first pipeline; a plurality of recycling water pumps are respectively arranged between the plurality of recovery water tanks and the self-cleaning filter; the multiple recycling water pumps are used for pumping the water in the recycling water tank meeting the preset use requirement according to the control instruction, filtering the water by the self-cleaning filter, and conveying the water to the power station condensed water fine treatment system for repeated use through the first pipeline.

2. The wastewater treatment system for polishing condensate from power stations of claim 1, wherein said plurality of recovery ponds comprise: a first-stage recycled water pool, a second-stage recycled water pool and a third-stage recycled water pool; the water quality grade of the water stored in the recovered water tertiary pool is higher than that of the recovered water secondary pool, and the water quality grade of the water stored in the recovered water secondary pool is higher than that of the recovered water primary pool.

3. The wastewater treatment system for the polishing of power plant condensate according to claim 2, further comprising a water quality level detector and a plurality of pneumatic valves between said second resin trap and said plurality of recovery ponds.

4. The wastewater treatment system for the fine treatment of the condensate of the power station as claimed in claim 1, wherein an electric conductivity detector and a turbidity detector are further arranged between the self-cleaning filter and the first pipeline, and the electric conductivity detector and the turbidity detector are used for detecting whether the water quality of the water flowing out through the self-cleaning filter and to be conveyed to the fine treatment system of the condensate of the power station through the first pipeline meets preset use requirements.

5. The wastewater treatment system for the fine treatment of the condensed water of the power station as claimed in claim 4, wherein a second pipeline connected in parallel with the first pipeline is connected after the conductivity detector and the turbidity detector, the second pipeline is connected with a raw water pool of boiler make-up water, and the second pipeline is used for conveying water with the quality which does not meet the preset use requirement and flows out of the self-cleaning filter to the raw water pool of boiler make-up water for reuse after being treated correspondingly.

6. The wastewater treatment system for the polishing of condensate from power stations of claim 1, further comprising a wastewater type detector disposed between the power station condensate polishing system and the first and second resin traps; wherein the wastewater type detector is used for determining the type of the wastewater according to the source of the wastewater, the treatment stage when the wastewater is discharged, or the characteristics of the wastewater.

7. A method for wastewater treatment of condensate polishing in a power plant using the wastewater treatment system for wastewater treatment of condensate polishing in a power plant according to any one of claims 1 to 6, comprising:

determining the water quality grade of the filtered second-class wastewater;

8. The method of claim 7, further comprising:

9. The method of claim 7, wherein determining the type of wastewater based on the source of the wastewater, the treatment stage, or the characteristics of the wastewater comprises:

10. The utility model provides a waste water treatment device of power station condensate polishing which characterized in that includes: