Ion exchanger flushing water cascade recycling system and use method thereof

Abstract

The invention discloses an ion exchanger flushing water cascade recycling system and a use method thereof. The ion exchanger flushing water cascade recycling system is characterized in that a first pipeline is communicated between a cation exchanger and an anion exchanger, a second pipeline is communicated between the anion exchanger and a mixed ion exchanger, and the mixed ion exchanger is communicated with a flushing water discharge pipeline; a sodium ion detection valve group is arranged on the first pipeline, a conductivity detection valve group is arranged on the second pipeline, and a conductivity and silicon content detection valve group is arranged on the flushing water discharge pipeline; the sodium ion detection valve group, the conductivity detection valve group and the conductivity and silicon content detection valve group are all communicated with a fresh water recycling unit; the cation exchanger is communicated with a washing water pretreatment system, and the cation exchanger is communicated with the fresh water recovery unit. According to the invention, cascade detection is carried out on the flushing water of a plurality of ion exchangers, cascade recycling of the flushing water is realized, and the effect of saving water resources can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ion exchanger flushing water recovery, and in particular to an ion exchanger flushing water cascade recovery and utilization system and a use method thereof. Background Art

[0002] At present, most of the systems in China that use resin exchange as desalination medium have intermittent operation. All ion exchangers must be flushed every time they are put into operation from the standby mode. The flushing time and flushing water volume vary according to the water production. Although this part of water does not meet the water production design requirements of the ion exchange equipment itself, the various indicators of this part of water quality are much higher than the water quality of the ion exchanger inlet water. According to the actual investigation of factories and mines using ion exchangers, this part of water is currently recycled as wastewater, but it also causes the low use of high-quality water, resulting in a certain degree of waste, and increases the pressure of wastewater treatment. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To achieve the above-mentioned object, the present invention proposes an ion exchanger flushing water volume recovery and utilization system, comprising a cation exchanger, an anion exchanger and a mixed ion exchanger connected in sequence by pipelines, a first pipeline is connected between the cation exchanger and the anion exchanger, a second pipeline is connected between the anion exchanger and the mixed ion exchanger, a flushing water discharge pipeline is connected to the mixed ion exchanger, and the flushing water discharge pipeline is connected to a boiler water unit;

[0005] The first pipeline is provided with a sodium ion detection valve group, the second pipeline is provided with a conductivity detection valve group, and the flushing water discharge pipeline is provided with a conductivity and silicon content detection valve group; the sodium ion detection valve group, the conductivity detection valve group, and the conductivity and silicon content detection valve group are all connected and provided with a fresh water recycling unit;

[0006] The cation exchanger is connected to a flushing water pretreatment system, and the cation exchanger is connected to the fresh water recovery unit.

[0007] The present invention realizes the step-by-step recycling of the flushing water by performing step-by-step detection on the flushing water of multiple ion exchangers. On the one hand, the flushing effect of each ion exchanger is improved, and on the other hand, the multi-stage recycling of water resources can save water resources.

[0008] Optionally, the sodium ion detection valve group includes a first electric three-way valve and an online sodium ion detector electrically connected to each other; the conductivity detection valve group includes a second electric three-way valve and a first online conductivity detector electrically connected to each other; the conductivity and silicon content detection valve group includes a third electric three-way valve, a second online conductivity detector and an online silicon content detector, and the online conductivity detector and the silicon content detector are both electrically connected to the electric three-way valve.

[0009] Furthermore, the online sodium ion detector, the first online conductivity detector, the second online conductivity detector and the online silicon content detector are all electrically or wirelessly connected to the same controller.

[0010] Furthermore, the flushing water pretreatment system includes a raw water tank, which is sequentially connected to a filtration unit, an ultrafiltration unit and a reverse osmosis unit, the reverse osmosis unit is connected to the cation exchanger, and the reverse osmosis unit is connected to an industrial wastewater reuse unit, and the industrial wastewater recovery unit is connected to a plant industrial water unit.

[0011] Further, a first turbidity detection valve group is provided on the communication pipeline between the filtration unit and the ultrafiltration unit; a second turbidity detection valve group is provided on the communication pipeline between the ultrafiltration unit and the reverse osmosis unit;

[0012] The first turbidity detection valve group includes a first turbidity detector and an electric four-way valve electrically connected to each other, and the electric four-way valve is connected to the raw water tank and the industrial wastewater reuse water unit respectively;

[0013] The second turbidity detection valve group includes a second turbidity detector and a fourth electric three-way valve group electrically connected to each other, and the fourth electric three-way valve is connected to the raw water tank.

[0014] Furthermore, an ultrafiltration water tank is connected to the water outlet of the reverse osmosis unit, and the ultrafiltration water tank is connected to the water inlet of the reverse osmosis unit.

[0015] The present application also provides a method for using an ion exchanger flushing water volume recovery and utilization system, comprising the following steps;

[0016] S1. The water in the raw water tank of the flushing water pretreatment system is pretreated by the filtration unit, the ultrafiltration unit and the reverse osmosis unit to form product water, which is then passed into the cation exchanger for flushing operation, and the turbidity of the water after passing through the filtration unit and the ultrafiltration unit is tested, and the water with unqualified turbidity is recycled in stages;

[0017] S2. The product water enters the cation exchanger, anion exchanger and mixed ion exchanger in turn for flushing operations. The flushing water after flushing through each ion exchanger is tested, and the flushing water that fails the test is gradient recovered to the fresh water reuse unit and passed into the cation exchanger for flushing operations again.

[0018] Further, in S1, the water flows through the first turbidity detector and the electric four-way valve after passing through the filter unit, and the control method of the first turbidity detector and the electric four-way valve is as follows;

[0019] When the detection result of the first turbidity detector is greater than 20NTU, NTU is the unit water turbidity, and the water turbidity is unqualified, the electric four-way valve receives the signal from the first turbidity detector, and the electric four-way valve is connected to the industrial wastewater reuse unit. After the water flow is recovered to the industrial wastewater reuse unit, it is used to supply industrial water for the factory area;

[0020] When 20NTU≥the test result of the first turbidity detector>1NTU, the turbidity of the water flow is unqualified, and the electric four-way valve receives the signal from the first turbidity detector, and the electric four-way valve is connected to the raw water tank;

[0021] When the detection result of the first turbidity detector is ≤1NTU, the turbidity of the water flow is qualified, the electric four-way valve receives the signal sent by the first turbidity detector, and the electric four-way valve is connected to the ultrafiltration unit;

[0022] After passing through the ultrafiltration unit, the water flows through the second turbidity detector and the fourth electric three-way valve. The control method of the second turbidity detector and the fourth electric three-way valve is as follows:

[0023] When 1NTU≥the test result of the second turbidity detector>0.1NTU, the turbidity of the water flow is unqualified, the fourth electric three-way valve receives the signal from the second turbidity detector, and the fourth electric three-way valve is connected to the raw water tank;

[0024] When the detection result of the second turbidity detector is ≤0.1NTU, the turbidity of the water flow is qualified, the fourth electric three-way valve receives the signal sent by the second turbidity detector, and the fourth electric three-way valve is connected to the reverse osmosis unit.

[0025] Further, in S2, the flushing water is discharged from the cation exchanger and passes through the online sodium ion detector and the first electric three-way valve. The online sodium ion detector and the first electric three-way valve are controlled as follows:

[0026] When the test result of the online sodium ion detector is greater than 100 μg / L, the sodium ion content of the water flow is unqualified, and the first electric three-way valve receives a signal from the online sodium ion detector, and the first electric three-way valve is connected to the fresh water reuse unit;

[0027] When the test result of the online sodium ion detector is ≤100μg / L, the sodium ion content of the water flow is qualified, the first electric three-way valve receives the signal from the online sodium ion detector, and the first electric three-way valve is connected to the anion exchanger;

[0028] After being discharged from the anion exchanger, the flushing water passes through the online conductivity detector and the second electric three-way valve. The control method of the first online conductivity detector and the second electric three-way valve is as follows:

[0029] When the detection result of the first online conductivity detector is greater than 5μs / cm, the water flow conductivity is unqualified, the second electric three-way valve receives the signal from the first online conductivity detector, and the first electric three-way valve is connected to the fresh water reuse unit;

[0030] When the detection result of the first online conductivity detector is ≤5μs / cm, the water flow conductivity is qualified, the second electric three-way valve receives the signal sent by the first online conductivity detector, and the second electric three-way valve is connected to the mixed ion exchanger;

[0031] After being discharged from the mixed ion exchanger, the flushing water passes through the second online conductivity detector, the online silicon content detector and the third electric three-way valve. The control method of the second online conductivity detector, the online silicon content detector and the second electric three-way valve is as follows:

[0032] When the detection result of the second online conductivity detector is greater than 0.2μs / cm or the detection result of the online silicon content detector is greater than 10μg / L, the water flow conductivity or silicon content is unqualified, and the third electric three-way valve receives the signal from the second online conductivity detector and the online silicon content detector, and the third electric three-way valve is connected to the fresh water reuse unit;

[0033] When the detection result of the second online conductivity detector is ≤0.2μs / cm and the detection result of the online silicon content detector is ≤10μg / L, the water conductivity and silicon content are qualified, and the third electric three-way valve receives the signals from the second online conductivity detector and the online silicon content detector, and the third electric three-way valve is connected to the boiler water unit.

[0034] Furthermore, the reverse osmosis unit is connected to an ultrafiltration water tank, and the reverse osmosis unit needs to be flushed before commissioning and before shutting down. The flushing water of the reverse osmosis unit is stored in the ultrafiltration water tank for re-entering the reverse osmosis unit, and after participating in the filtration of the reverse osmosis unit, forms product water that is passed into the cation exchanger. Additional aspects and advantages of the present invention will be partially given in the following description, and partially will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 It is a schematic diagram of the overall structure of an ion exchanger flushing water volume recovery and utilization system according to the present invention;

[0037] Figure 2 It is a schematic flow chart of the steps of a method for using an ion exchanger flushing water volume recovery and utilization system according to the present invention;

[0038] Figure 3 The present invention is a schematic diagram of the process flow of an ion exchanger flushing water volume recovery and utilization system.

[0039] Description of reference numerals:

[0040] 1. Cation exchanger; 11. First pipeline; 2. Anion exchanger; 21. Second pipeline; 3. Mixed ion exchanger; 31. Flushing water discharge pipeline; 4. Sodium ion detection valve group; 41. Online sodium ion detector; 42. First electric three-way valve; 5. Conductivity detection valve group; 51. First online conductivity detector; 52. Second electric three-way valve; 6. Conductivity and silicon content detection valve group; 61. Second online conductivity detector; 62. Online silicon content detector; 63. Third online conductivity detector 1. Electric three-way valve; 2. Fresh water reuse unit; 3. Flushing water pretreatment system; 4. Raw water tank; 5. Filtration unit; 6. Ultrafiltration unit; 7. Reverse osmosis unit; 8. Industrial wastewater reuse unit; 8. First turbidity detection valve group; 861. First turbidity detector; 862. Electric four-way valve; 87. Second turbidity detection valve group; 871. Second turbidity detector; 872. Fourth electric three-way valve; 88. Plant industrial water unit; 9. Boiler water unit; 10. Ultrafiltration tank. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] The present application provides a system for recycling the volume of ion exchanger flushing water. Figure 1 Elaborate in detail.

[0043] An ion exchanger flushing water volume recovery and utilization system comprises a cation exchanger 1, an anion exchanger 2 and a mixed ion exchanger 3 which are sequentially connected by pipelines, a first pipeline 11 is connected between the cation exchanger 1 and the anion exchanger 2, a second pipeline 21 is connected between the anion exchanger 2 and the mixed ion exchanger 3, a flushing water discharge pipeline 31 is connected to the mixed ion exchanger 3, and the flushing water discharge pipeline 31 is connected to a boiler water unit 9;

[0044] The first pipeline 11 is provided with a sodium ion detection valve group 4, the second pipeline 21 is provided with a conductivity detection valve group 5, and the flushing water discharge pipeline 31 is provided with a conductivity and silicon content detection valve group 6; the sodium ion detection valve group 4, the conductivity detection valve group 5, and the conductivity and silicon content detection valve group 6 are all connected to a fresh water recycling unit 7;

[0045] The cation exchanger 1 is connected to a flushing water pretreatment system 8, and the cation exchanger 1 is connected to a fresh water recovery unit.

[0046] The present invention realizes the step-by-step recycling of the flushing water by performing step-by-step detection on the flushing water of multiple ion exchangers. On the one hand, the flushing effect of each ion exchanger is improved, and on the other hand, the multi-stage recycling of water resources can save water resources.

[0047] In some embodiments, the sodium ion detection valve group 4 includes a first electric three-way valve 42 and an online sodium ion detector 41 electrically connected to each other; the online sodium ion detector 41 is used to detect the sodium ion content in the flushing water of the cation exchanger 1. When the sodium ion detector detects that the sodium ion content in the flushing water exceeds a threshold value, the sodium ion detector sends a recovery working electrical signal to the first electric three-way valve 42, and the first electric three-way valve 42 is connected to the fresh water reuse unit 7;

[0048] The conductivity detection valve group 5 includes a second electric three-way valve 52 and a first online conductivity detector 51 which are electrically connected to each other; the first online conductivity detector 51 is used to detect the conductivity in the flushing water of the anion exchanger 2. When the first online conductivity detector 51 detects that the conductivity in the flushing water exceeds a threshold value, the first online conductivity detector 51 sends a recovery working electrical signal to the second electric three-way valve 52, and the second electric three-way valve 52 is connected to the fresh water reuse unit 7;

[0049] The conductivity and silicon content detection valve group 6 includes a third electric three-way valve 63, a second online conductivity detector 61 and an online silicon content detector 62. The online conductivity detector and the silicon content detector are both electrically connected to the electric three-way valve. When the detection results of the second online conductivity detector 61 and the online silicon content detector 62 are both less than the threshold value, the second online conductivity detector 61 and the online silicon content detector 62 both send a qualified signal to the third electric three-way valve 63. At this time, the third electric three-way valve 63 is connected to the boiler water unit 9; in other cases, the third electric three-way valve 63 is connected to the fresh water reuse unit 7.

[0050] In some embodiments, the online sodium ion detector 41, the first online conductivity detector 51, the second online conductivity detector 61, and the online silicon content detector 62 are all electrically or wirelessly connected to the same controller. The online data control of each detector is performed by the same controller, which facilitates the staff to perform unified observation and unified regulation of the threshold values ​​of each detector.

[0051] In some embodiments, the flushing water pretreatment system 8 includes a raw water tank 81, which is sequentially connected to a filtration unit 82, an ultrafiltration unit 83, and a reverse osmosis unit 84, the reverse osmosis unit 84 is connected to the cation exchanger 1, and the reverse osmosis unit 84 is connected to an industrial wastewater recycling unit 85, and the industrial wastewater recycling unit is connected to a plant industrial water unit 88. The concentration of the flushing water is filtered by the filtration unit 82, the ultrafiltration unit 83, and the reverse osmosis unit 84 to reduce the concentration of the flushing water to meet the flushing standard.

[0052] In some embodiments, a first turbidity detection valve group 86 is provided on the communication pipe between the filtration unit 82 and the ultrafiltration unit 83; a second turbidity detection valve group 87 is provided on the communication pipe between the ultrafiltration unit 83 and the reverse osmosis unit 84;

[0053] The first turbidity detection valve group 86 includes a first turbidity detector 861 and an electric four-way valve 862 which are electrically connected to each other. The electric four-way valve 862 is connected to the raw water tank 81 and the industrial wastewater reuse unit 85 respectively.

[0054] When 20NTU≥the detection result of the first turbidity detector 861>1NTU, the turbidity of the water flow is unqualified, and the electric four-way valve 862 receives the signal from the first turbidity detector 861, and the electric four-way valve 862 is connected to the raw water tank 81;

[0055] When the detection result of the first turbidity detector 861 is ≤1NTU, the turbidity of the water flow is qualified, and the electric four-way valve 862 receives the signal sent by the first turbidity detector 861, and the electric four-way valve 862 is connected to the ultrafiltration unit 83;

[0056] The second turbidity detection valve group 87 includes a second turbidity detector 871 and a fourth electric three-way valve 872 group electrically connected to each other, and the fourth electric three-way valve 872 is connected to the raw water tank 81;

[0057] When 1NTU≥the detection result of the second turbidity detector 871>0.1NTU, the turbidity of the water flow is unqualified, and the fourth electric three-way valve 872 receives the signal from the second turbidity detector 871, and the fourth electric three-way valve 872 is connected to the raw water tank 81;

[0058] When the detection result of the second turbidity detector 871 is ≤0.1 NTU, the turbidity of the water flow is qualified, and the fourth electric three-way valve 872 receives the signal from the second turbidity detector 871 , and the fourth electric three-way valve 872 is connected to the reverse osmosis unit 84 .

[0059] In some embodiments, the water outlet of the reverse osmosis unit 84 is connected to an ultrafiltration water tank 10, and the ultrafiltration water tank 10 is connected to the water inlet of the reverse osmosis unit 84. The reverse osmosis unit 84 needs to be flushed before commissioning and before shutting down. The flushing water of the reverse osmosis unit 84 is stored in the ultrafiltration water tank 10 to be passed into the reverse osmosis unit 84 again, and participates in the filtration of the reverse osmosis unit 84 to form product water passed into the cation exchanger 1.

[0060] The present application also provides a method for using the ion exchanger flushing water volume recovery and utilization system, as shown below. Figures 2 to 3 Elaborate in detail.

[0061] A method for using an ion exchanger flushing water volume recovery and utilization system comprises the following steps;

[0062] S1, the water in the raw water tank 81 of the flushing water pretreatment system 8 is pretreated by the filtration unit 82, the ultrafiltration unit 83 and the reverse osmosis unit 84 to form product water, which is then passed into the cation exchanger 1 for flushing operation, and the turbidity of the water after passing through the filtration unit 82 and the ultrafiltration unit 83 is tested, and the water with unqualified turbidity is recycled in stages;

[0063] S2, the product water enters the cation exchanger 1, the anion exchanger 2 and the mixed ion exchanger 3 in sequence for flushing operations, the flushing water after flushing through each ion exchanger is tested, and the flushing water that fails the test is gradient recovered to the fresh water reuse unit 7, and is used to enter the cation exchanger 1 for flushing operations next time.

[0064] In some embodiments, in S1, the water flows through the first turbidity detector 861 and the electric four-way valve 862 after passing through the filter unit 82. The control method of the first turbidity detector 861 and the electric four-way valve 862 is as follows;

[0065] When the detection result of the first turbidity detector 861 is greater than 20NTU, NTU is the unit water turbidity, and the water turbidity is unqualified, the electric four-way valve 862 receives the signal from the first turbidity detector 861, and the electric four-way valve 862 is connected to the industrial wastewater reuse unit 85, and the water is recycled to the industrial wastewater reuse unit 85 to supply industrial water for the factory area;

[0066] When 20NTU≥the detection result of the first turbidity detector 861>1NTU, the turbidity of the water flow is unqualified, and the electric four-way valve 862 receives the signal from the first turbidity detector 861, and the electric four-way valve 862 is connected to the raw water tank 81;

[0067] When the detection result of the first turbidity detector 861 is ≤1NTU, the turbidity of the water flow is qualified, and the electric four-way valve 862 receives the signal from the first turbidity detector 861, and the electric four-way valve 862 is connected to the ultrafiltration unit 83.

[0068] In some embodiments, in S1, the water flows through the ultrafiltration unit 83 and then passes through the second turbidity detector 871 and the fourth electric three-way valve 872. The control method of the second turbidity detector 871 and the fourth electric three-way valve 872 is as follows:

[0069] When 1NTU≥the detection result of the second turbidity detector 871>0.1NTU, the turbidity of the water flow is unqualified, and the fourth electric three-way valve 872 receives the signal from the second turbidity detector 871, and the fourth electric three-way valve 872 is connected to the raw water tank 81;

[0070] When the detection result of the second turbidity detector 871 is ≤0.1 NTU, the turbidity of the water flow is qualified, and the fourth electric three-way valve 872 receives the signal from the second turbidity detector 871 , and the fourth electric three-way valve 872 is connected to the reverse osmosis unit 84 .

[0071] In some embodiments, in S2, the flushing water is discharged from the cation exchanger 1 and passes through the online sodium ion detector 41 and the first electric three-way valve 42, combined with the attached Figure 3 , where is the sodium ion detection valve group 4, the control method of the online sodium ion detector 41 and the first electric three-way valve 42 is as follows:

[0072] When the detection result of the online sodium ion detector 41 is greater than 100 μg / L, the sodium ion content of the water flow is unqualified, and the first electric three-way valve 42 receives the signal sent by the online sodium ion detector 41, and the first electric three-way valve 42 is connected to the fresh water reuse unit 7;

[0073] When the detection result of the online sodium ion detector 41 is ≤100 μg / L, the sodium ion content of the water flow is qualified, and the first electric three-way valve 42 receives the signal from the online sodium ion detector 41 , and the first electric three-way valve 42 is connected to the anion exchanger 2 .

[0074] In some embodiments, in S2, the flushing water is discharged from the anion exchanger 2 and passes through the online conductivity detector and the second electric three-way valve 52, combined with the attached Figure 3 , where SC is the conductivity detection valve group 5, the control method of the first online conductivity detector 51 and the second electric three-way valve 52 is as follows:

[0075] When the detection result of the first online conductivity detector 51 is greater than 5 μs / cm, the water flow conductivity is unqualified, the second electric three-way valve 52 receives the signal from the first online conductivity detector 51, and the first electric three-way valve 42 is connected to the fresh water reuse unit 7;

[0076] When the detection result of the first online conductivity detector 51 is ≤5 μs / cm, the water flow conductivity is qualified, the second electric three-way valve 52 receives the signal from the first online conductivity detector 51 , and the second electric three-way valve 52 is connected to the mixed ion exchanger 3 .

[0077] In some embodiments, in S2, the flushing water is discharged from the mixed ion exchanger 3 and passes through the second online conductivity detector 61, the online silicon content detector 62 and the third electric three-way valve 63, and the attached Figure 3 , where is the conductivity and silicon content detection valve group 6, then the control method of the second online conductivity detector 61, the online silicon content detector 62 and the second electric three-way valve 52 is as follows:

[0078] When the detection result of the second online conductivity detector 61 is greater than 0.2 μs / cm or the detection result of the online silicon content detector 62 is greater than 10 μg / L, the water flow conductivity or silicon content is unqualified, and the third electric three-way valve 63 receives the signals from the second online conductivity detector 61 and the online silicon content detector 62, and the third electric three-way valve 63 is connected to the fresh water reuse unit 7;

[0079] When the detection result of the second online conductivity detector 61 is ≤0.2μs / cm and the detection result of the online silicon content detector 62 is ≤10μg / L, the water flow conductivity and silicon content are qualified, and the third electric three-way valve 63 receives the signals from the second online conductivity detector 61 and the online silicon content detector 62, and the third electric three-way valve 63 is connected to the boiler water unit 9;

[0080] When the third electric three-way valve 63 is connected to the boiler water unit 9, it is necessary to simultaneously receive the signal that the detection result of the second online conductivity detector 61 is ≤0.2μs / cm and the signal that the detection result of the online silicon content detector 62 is ≤10μg / L. Only then is the third electric three-way valve 63 connected to the boiler water unit 9; in other cases, the third electric three-way valve 63 is connected to the fresh water reuse unit 7.

[0081] In some embodiments, the reverse osmosis unit 84 is connected to the ultrafiltration water tank 10. The reverse osmosis unit 84 needs to be flushed before commissioning and before shutting down. The flushing water of the reverse osmosis unit 84 is stored in the ultrafiltration water tank 10 to be passed into the reverse osmosis unit 84 again, and after participating in the filtration of the reverse osmosis unit 84, the product water is formed and passed into the cation exchanger 1.

[0082] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An ion exchanger flushing water volume recovery and utilization system, characterized in that: It comprises a cation exchanger, anion exchanger and mixed ion exchanger which are connected in sequence by pipelines, wherein a first pipeline is connected between the cation exchanger and the anion exchanger, a second pipeline is connected between the anion exchanger and the mixed ion exchanger, a flushing water discharge pipeline is connected to the mixed ion exchanger, and the flushing water discharge pipeline is connected to a boiler water unit; The first pipeline is provided with a sodium ion detection valve group, the second pipeline is provided with a conductivity detection valve group, and the flushing water discharge pipeline is provided with a conductivity and silicon content detection valve group; the sodium ion detection valve group, the conductivity detection valve group, and the conductivity and silicon content detection valve group are all connected and provided with a fresh water recycling unit; The cation exchanger is connected to a flushing water pretreatment system, and the cation exchanger is connected to the fresh water recovery unit.

2. The ion exchanger flushing water volume recovery and utilization system according to claim 1, characterized in that: The sodium ion detection valve group includes a first electric three-way valve and an online sodium ion detector electrically connected to each other; the conductivity detection valve group includes a second electric three-way valve and a first online conductivity detector electrically connected to each other; the conductivity and silicon content detection valve group includes a third electric three-way valve, a second online conductivity detector and an online silicon content detector, and the online conductivity detector and the silicon content detector are both electrically connected to the electric three-way valve; the first electric three-way valve, the second electric three-way valve and the third electric three-way valve are all connected to a fresh water reuse unit.

3. The ion exchanger flushing water volume recovery and utilization system according to claim 2, characterized in that: The online sodium ion detector, the first online conductivity detector, the second online conductivity detector and the online silicon content detector are all electrically or wirelessly connected to the same controller.

4. The ion exchanger flushing water volume recovery and utilization system according to claim 1, characterized in that: The flushing water pretreatment system includes a raw water tank, which is connected to a filtration unit, an ultrafiltration unit and a reverse osmosis unit in sequence. The reverse osmosis unit is connected to the cation exchanger, and the reverse osmosis unit is connected to an industrial wastewater recycling unit, and the industrial wastewater recycling unit is connected to a plant industrial water unit.

5. The ion exchanger flushing water volume recovery and utilization system according to claim 4, characterized in that: A first turbidity detection valve group is provided on the communication pipeline between the filtration unit and the ultrafiltration unit; a second turbidity detection valve group is provided on the communication pipeline between the ultrafiltration unit and the reverse osmosis unit; The first turbidity detection valve group includes a first turbidity detector and an electric four-way valve electrically connected to each other, and the electric four-way valve is connected to the raw water tank and the industrial wastewater reuse water unit respectively; The second turbidity detection valve group includes a second turbidity detector and a fourth electric three-way valve group electrically connected to each other, and the fourth electric three-way valve is connected to the raw water tank.

6. The ion exchanger flushing water volume recovery and utilization system according to claim 4, characterized in that: An ultrafiltration water tank is connected to the water outlet of the reverse osmosis unit, and the ultrafiltration water tank is connected to the water inlet of the reverse osmosis unit.

7. A method for using an ion exchanger flushing water volume recovery system, characterized in that: The steps include: S1. The water in the raw water tank of the flushing water pretreatment system is pretreated by the filtration unit, the ultrafiltration unit and the reverse osmosis unit to form product water, which is then passed into the cation exchanger for flushing operation, and the turbidity of the water after passing through the filtration unit and the ultrafiltration unit is tested, and the water with unqualified turbidity is recycled in stages; S2. The product water enters the cation exchanger, anion exchanger and mixed ion exchanger in turn for flushing operations. The flushing water after flushing through each ion exchanger is tested, and the flushing water that fails the test is gradient recovered to the fresh water reuse unit and passed into the cation exchanger for flushing operations again.

8. The method for using the ion exchanger flushing water volume recovery and utilization system according to claim 7, characterized in that: In S1, the water flows through the first turbidity detector and the electric four-way valve after passing through the filter unit. The control method of the first turbidity detector and the electric four-way valve is as follows; When the detection result of the first turbidity detector is greater than 20NTU, NTU is the unit water turbidity, and the water turbidity is unqualified, the electric four-way valve receives the signal from the first turbidity detector, and the electric four-way valve is connected to the industrial wastewater reuse unit. After the water flow is recovered to the industrial wastewater reuse unit, it is used to supply industrial water for the factory area; When 20NTU≥the test result of the first turbidity detector>1NTU, the turbidity of the water flow is unqualified, and the electric four-way valve receives the signal from the first turbidity detector, and the electric four-way valve is connected to the raw water tank; When the detection result of the first turbidity detector is ≤1NTU, the turbidity of the water flow is qualified, the electric four-way valve receives the signal sent by the first turbidity detector, and the electric four-way valve is connected to the ultrafiltration unit; After passing through the ultrafiltration unit, the water flows through the second turbidity detector and the fourth electric three-way valve. The control method of the second turbidity detector and the fourth electric three-way valve is as follows: When 1NTU≥the test result of the second turbidity detector>0.1NTU, the turbidity of the water flow is unqualified, the fourth electric three-way valve receives the signal from the second turbidity detector, and the fourth electric three-way valve is connected to the raw water tank; When the detection result of the second turbidity detector is ≤0.1NTU, the turbidity of the water flow is qualified, the fourth electric three-way valve receives the signal sent by the second turbidity detector, and the fourth electric three-way valve is connected to the reverse osmosis unit.

9. The method for using the ion exchanger flushing water volume recovery and utilization system according to claim 7, characterized in that: In S2, the flushing water is discharged from the cation exchanger and passes through the online sodium ion detector and the first electric three-way valve. The control method of the online sodium ion detector and the first electric three-way valve is as follows: When the test result of the online sodium ion detector is greater than 100 μg / L, the sodium ion content of the water flow is unqualified, and the first electric three-way valve receives a signal from the online sodium ion detector, and the first electric three-way valve is connected to the fresh water reuse unit; When the test result of the online sodium ion detector is ≤100μg / L, the sodium ion content of the water flow is qualified, the first electric three-way valve receives the signal from the online sodium ion detector, and the first electric three-way valve is connected to the anion exchanger; After being discharged from the anion exchanger, the flushing water passes through the online conductivity detector and the second electric three-way valve. The control method of the first online conductivity detector and the second electric three-way valve is as follows: When the detection result of the first online conductivity detector is greater than 5μs / cm, the water flow conductivity is unqualified, the second electric three-way valve receives the signal from the first online conductivity detector, and the first electric three-way valve is connected to the fresh water reuse unit; When the detection result of the first online conductivity detector is ≤5μs / cm, the water flow conductivity is qualified, the second electric three-way valve receives the signal sent by the first online conductivity detector, and the second electric three-way valve is connected to the mixed ion exchanger; After being discharged from the mixed ion exchanger, the flushing water passes through the second online conductivity detector, the online silicon content detector and the third electric three-way valve. The control method of the second online conductivity detector, the online silicon content detector and the second electric three-way valve is as follows: When the detection result of the second online conductivity detector is greater than 0.2μs / cm or the detection result of the online silicon content detector is greater than 10μg / L, the water flow conductivity or silicon content is unqualified, and the third electric three-way valve receives the signal from the second online conductivity detector and the online silicon content detector, and the third electric three-way valve is connected to the fresh water reuse unit; When the detection result of the second online conductivity detector is ≤0.2μs / cm and the detection result of the online silicon content detector is ≤10μg / L, the water conductivity and silicon content are qualified, and the third electric three-way valve receives the signals from the second online conductivity detector and the online silicon content detector, and the third electric three-way valve is connected to the boiler water unit.

10. The method for using the ion exchanger flushing water volume recovery and utilization system according to claim 7, characterized in that: The reverse osmosis unit is connected to an ultrafiltration water tank. The reverse osmosis unit needs to be flushed before commissioning and before shutting down. The flushing water of the reverse osmosis unit is stored in the ultrafiltration water tank for re-introduction into the reverse osmosis unit to participate in the filtration of the reverse osmosis unit to form product water that is passed into the cation exchanger.

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