CN115057502A - Series washing circulating system and method for secondary desalting ion exchanger - Google Patents
Series washing circulating system and method for secondary desalting ion exchanger Download PDFInfo
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- CN115057502A CN115057502A CN202210735713.7A CN202210735713A CN115057502A CN 115057502 A CN115057502 A CN 115057502A CN 202210735713 A CN202210735713 A CN 202210735713A CN 115057502 A CN115057502 A CN 115057502A
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- 238000005406 washing Methods 0.000 title claims abstract description 64
- 238000011033 desalting Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 226
- 150000002500 ions Chemical class 0.000 claims abstract description 85
- 150000001768 cations Chemical class 0.000 claims abstract description 74
- 150000001450 anions Chemical class 0.000 claims abstract description 73
- 239000013505 freshwater Substances 0.000 claims abstract description 50
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 36
- 229910052710 silicon Inorganic materials 0.000 claims description 36
- 239000010703 silicon Substances 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 28
- 239000011734 sodium Substances 0.000 claims description 19
- 229910052708 sodium Inorganic materials 0.000 claims description 19
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 18
- 238000010612 desalination reaction Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 4
- 238000005201 scrubbing Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000005349 anion exchange Methods 0.000 description 6
- 238000005341 cation exchange Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- 239000003957 anion exchange resin Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/60—Cleaning or rinsing ion-exchange beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention provides a serial washing circulating system and method of a two-stage desalting ion exchanger, which comprises a fresh water tank, a cation exchanger, an anion exchanger, a carbon remover, an anion exchanger, a mixed ion exchanger and a desalting water tank, wherein circulating pipes are respectively arranged on water inlet pipes and water outlet pipes of the cation exchanger, the anion exchanger and the mixed ion exchanger. The invention has the advantages that the cation exchanger, the anion exchanger and the mixed ion exchanger are respectively circularly washed in series through the three circulating pipes during the period from the shutdown to the operation of the secondary desalting ion exchanger, thereby avoiding the waste of water resources caused by the washing of direct-discharge water, and the three circulating pipes are provided with the electric valve and the detection meter which are controlled by the cation bed PLC controller, the anion bed PLC controller and the mixed bed PLC controller, thereby realizing the automatic control of circular washing in series, ensuring the effluent quality of the ion exchanger, shortening the washing time and avoiding the power consumption caused by excessive circular washing in series.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a serial washing circulating system and method of a secondary desalting ion exchanger.
Background
China is short of water resources, and the water resources are absolutely saved and utilized. When the boiler of the thermal power generating unit supplies water, secondary desalting operation is required, and the secondary desalting ion exchange bed consumes water in the processes of resin regeneration, replacement, forward washing, flushing before shutdown and operation and the like. The index for measuring the water-saving effect of a water treatment device is the water consumption rate, namely the percentage of water consumed by the water process for producing the product, which is generally calculated by one operation period. There are generally two ways to reduce the rate of water use by oneself: firstly, reduce the water consumption of oneself, secondly increase the cycle system water yield. The reduction of the self-water consumption and the increase of the cycle water making quantity and the self-water consumption rate are multiple effects.
The existing ion exchange serial washing water circulation system is provided with a pure water barrel, an anion exchange column and a cation exchange column, wherein the pure water barrel is connected to a liquid inlet of the cation exchange column through a water inlet pipe, a liquid outlet of the cation exchange column is connected to a liquid inlet of the anion exchange column, and a liquid outlet of the anion exchange column is connected to a water recovery tank through a water outlet pipe. A water return pipe is also connected between the water outlet pipe and the water inlet pipe. Although the cation and anion exchange columns can be effectively washed in series, each exchange column needs a certain time for carrying out exchange reaction, so the exchange efficiency is low, the reaction is insufficient, unreacted ions still exist in water, and the quality of the whole series washing is reduced; secondly, the existing ion exchange serial washing water circulation system cannot realize automatic control of circulating serial washing. Therefore, in view of the above-mentioned drawbacks, a serial washing cycle system and method for two-stage desalination ion exchanger are provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing ion exchange serial washing circulating system has the defects of low serial washing efficiency and poor serial washing quality, and can not carry out serial washing in an autonomous circulating manner, so that more water is wasted.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a circulation system is washed to second grade desalination ion exchanger cluster, including fresh water tank, cation exchanger, decarbonizer, anion exchanger and demineralized water tank, fresh water tank with it is provided with first outlet pipe to connect between the cation exchanger, cation exchanger with it is provided with the second outlet pipe to connect between the decarbonizer, the decarbonizer with it is provided with the third outlet pipe to connect between the anion exchanger. The system also comprises a mixed ion exchanger, a fourth water outlet pipe is connected and arranged between the anion exchanger and the mixed ion exchanger, and a drain pipe is connected and arranged between the mixed ion exchanger and the desalting water tank; a first circulating pipe is connected between the first water outlet pipe and the second water outlet pipe in a shunting manner, a second circulating pipe is connected between the third water outlet pipe and the fourth water outlet pipe in a shunting manner, and a third circulating pipe is connected between the third water outlet pipe and the water outlet pipe in a shunting manner;
a fresh water pump and a second electric valve are arranged on the first water outlet pipe from the connection part of the first water outlet pipe and the first circulating pipe to the section of the cation exchanger; a sodium meter is arranged on the second water outlet pipe from the connection part of the second water outlet pipe and the first circulating pipe to one section of the cation exchanger, a third electric valve is arranged on the second water outlet pipe at the other section, a fourth electric valve is arranged on the first circulating pipe, and the sodium meter, the third electric valve and the fourth electric valve are all in communication connection with a PLC (programmable logic controller) of the cation bed;
a middle water pump and a fifth electric valve are arranged on the third water outlet pipe from the joint of the third water outlet pipe and the second circulating pipe to the section of the anion exchanger, a first silica meter and a first electric conductivity meter are arranged on the fourth water outlet pipe from the joint of the fourth water outlet pipe and the second circulating pipe to the section of the anion exchanger, a sixth electric valve is arranged on the fourth water outlet pipe at the other section, a seventh electric valve is arranged on the second circulating pipe, and the first silica meter, the first electric conductivity meter, the sixth electric valve and the seventh electric valve are all in communication connection with a PLC controller of the anion bed;
the connection part of the third circulating pipe and the third water outlet pipe is arranged on the third water outlet pipe, the middle water pump is close to the carbon remover, a second silicon meter and a second electric conductivity meter are arranged on the water outlet pipe from the connection part of the third circulating pipe and the water outlet pipe to the mixed ion exchanger, an eighth electric valve is arranged on the water outlet pipe at the other section, a ninth electric valve is arranged on the third circulating pipe, and the second silicon meter, the second electric conductivity meter, the eighth electric valve and the ninth electric valve are all in communication connection with the mixed bed PLC.
Preferably, one end of the first water outlet pipe is arranged at the lower part of the fresh water tank, the other end of the first water outlet pipe is arranged at the upper part of the cation exchanger, one end of the second water outlet pipe is arranged at the bottom of the cation exchanger, the other end of the second water outlet pipe is arranged at the upper part of the carbon remover, one end of the third water outlet pipe is arranged at the lower part of the carbon remover, the other end of the third water outlet pipe is arranged at the upper part of the anion exchanger, one end of the fourth water outlet pipe is arranged at the bottom of the anion exchanger, the other end of the fourth water outlet pipe is arranged at the upper part of the mixed ion exchanger, one end of the water outlet pipe is arranged at the bottom of the mixed ion exchanger, and the other end of the water outlet pipe is arranged at the lower part of the desalted water tank.
Preferably, spraying devices are arranged on the upper portions of the cation exchanger, the anion exchanger and the mixed ion exchanger, and are respectively connected with the first water outlet pipe, the third water outlet pipe and the fourth water outlet pipe.
Preferably, a liquid level meter is provided in the solution tank of the decarbonizer.
Provides a serial washing circulating method of a secondary desalting ion exchanger,
s1, injecting water into the fresh water tank: opening the first electric valve, injecting water into the fresh water tank through the water inlet pipe, and closing the first electric valve when fresh water with enough liquid level exists in the fresh water tank after a period of time;
s2, the operation and serial washing of the cation exchanger: closing the third electric valve, opening the second electric valve and the fourth electric valve, putting the sodium meter into operation, starting the fresh water pump, circularly and serially washing the cation exchanger, putting the cation bed PLC controller into operation, receiving a signal of the sodium meter by the cation bed PLC controller, opening the third electric valve, and closing the fourth electric valve;
s3, injecting water into the carbon remover: after the operation and serial washing of the cation exchanger are finished, the effluent of the cation exchanger is delivered to the carbon remover through the second water outlet pipe, the liquid level meter is put into operation, and after a period of time, enough liquid level exists in the carbon remover, and the water pump is stopped;
s4, commissioning and serial washing of the anion exchanger: closing the sixth electric valve, opening the fifth electric valve and the seventh electric valve, commissioning the first silicon meter and the first conductivity meter, starting the intermediate water pump, circularly and serially washing the anion exchanger, commissioning the anion bed PLC controller, receiving signals of the first silicon meter and the first conductivity meter by the anion bed PLC controller, opening the sixth electric valve, and closing the seventh electric valve;
s5, commissioning and serial washing of the mixed ion exchanger: closing the eighth electric valve, opening the ninth electric valve, commissioning the second silicon meter and the second electric conductivity meter, after commissioning and serial washing of the anion exchanger are finished, enabling effluent of the anion exchanger to flow to the mixed ion exchanger through the fourth effluent pipe, serially washing the mixed ion exchanger through the working cycle of the intermediate water pump, commissioning the mixed bed PLC controller, receiving signals of the second silicon meter and the second electric conductivity meter by the mixed bed PLC controller, opening the eighth electric valve, and closing the ninth electric valve;
s6, continuously operating the secondary desalting system: when the effluent of the mixed ion exchanger flows to the desalted water tank through the drain pipe, the serial washing of the secondary desalted ion exchanger is finished, the fresh water pump can be started, the first electric valve is opened, the flow of the fresh water pump is adjusted to maintain the stable liquid levels of the fresh water tank and the carbon removal device, and the system is in a continuous operation state;
s7, stopping the secondary desalting system: and when the liquid level of the desalting water tank is enough, stopping the intermediate water pump, stopping the fresh water pump, closing the first electric valve, stopping the sodium meter, the first silicon meter, the first conductivity meter, the second silicon meter and the second conductivity meter from running, stopping the cation exchanger, the anion exchanger and the mixed ion exchanger from running, and stopping the system.
The invention has the advantages that the device is provided with the cation exchanger and the anion exchanger, the mixed ion exchanger, the carbon remover and the like, the first circulating pipe, the second circulating pipe and the third circulating pipe are arranged on the water inlet pipe and the water outlet pipe of the cation exchanger, the anion exchanger and the mixed ion exchanger respectively, and the cation exchanger, the anion exchanger and the mixed ion exchanger are circularly washed in series through the three circulating pipes during the period from the shutdown to the operation of the secondary desalting ion exchanger, so that the waste of water resources caused by the flushing of direct-discharge water is avoided; the water circulation pipelines of the cation exchanger, the anion exchanger and the mixed ion exchanger are respectively provided with a measuring meter for detecting the ion content in water, the pipelines are provided with electric valves for controlling the pipeline switches to be closed, the electric valves and the measuring meters on the cation exchanger, the anion exchanger and the mixed ion exchanger are respectively controlled by the cation bed PLC controller, the anion bed PLC controller and the mixed bed PLC controller to realize the automatic control of circulating series washing, when the effluent quality of the ion exchanger is unqualified, the circulating series washing can be circularly carried out, and when the effluent quality of the ion exchanger is qualified, the circulating series washing is stopped, the effluent quality of the ion exchanger is ensured, the washing time is shortened, and meanwhile, the electric energy consumption caused by excessive circulating series washing is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an overall device connection structure provided by an embodiment of the present invention;
FIG. 2 is a flow chart of a two-stage desalination ion exchanger cascade washing cycle system according to an embodiment of the present invention;
in the figure: 1-fresh water tank, 2-cation exchanger, 3-decarbonizer, 4-liquid level meter, 5-anion exchanger, 6-mixed ion exchanger, 7-desalted water tank, 8-first electric valve, 9-water inlet pipe, 10-fresh water pump, 11-second electric valve, 12-sodium meter, 13-third electric valve, 14-fourth electric valve, 15-cation bed PLC controller, 16-middle water pump, 17-fifth electric valve, 18-first silicon meter, 19-first electric conductivity meter, 20-sixth electric valve, 21-seventh electric valve, 22-anion bed PLC controller, 23-second silicon meter, 24-second electric conductivity meter, 25-eighth electric valve, 26-water outlet pipe, 27-ninth electric valve, 28-mixed bed PLC controller, 29-first water outlet pipe, 30-second water outlet pipe, 31-first circulating pipe, 32-third water outlet pipe, 33-fourth water outlet pipe, 34-second circulating pipe and 35-third circulating pipe.
Detailed Description
The above-described scheme is further illustrated below with reference to specific examples. It is to be understood that these examples are for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.
In one embodiment, a two-stage desalination ion exchanger cascade washing circulation system and method is provided, wherein the two-stage desalination ion exchanger cascade washing circulation system comprises a fresh water tank 1, a cation exchanger 2, a carbon remover 3, an anion exchanger 5, a mixed ion exchanger 6 and a desalination water tank 7. The cation exchanger 2, also called cation bed, is an ion exchanger capable of removing calcium ions and magnesium ions in water to prepare softened water, wherein the calcium ions and magnesium ions forming the hardness in water are exchanged with ion exchange resin in the cation exchanger 2, and the calcium ions and magnesium ions in water are exchanged by sodium ions, so that carbonate scale and sulfate scale are not easily formed in water, thereby obtaining softened water. The anion exchanger 5 is also called anion bed, and its function is to exchange hydroxide radical in anion resin for other anions in water, the mixture passes through anion exchange column, and the anions can be adsorbed and separated from other substances. The mixed ion exchanger 6 is also called a mixed bed, and is equipment capable of simultaneously carrying out cation and anion exchange, and cation exchange resin and anion exchange resin with a certain proportion are mixed and filled in the same exchange device to exchange and remove ions in liquid. In the scheme, a liquid level meter 4 is further arranged in the solution tank of the carbon remover 3, so that the liquid amount in the carbon remover 3 can be displayed in real time.
An inlet pipe 9 is connected to the upper part of the fresh water tank 1, and a first electric valve 8 is provided on the inlet pipe 9, so that fresh water can be injected into the fresh water tank 1. A first water outlet pipe 29 is connected between the fresh water tank 1 and the cation exchanger 2, a second water outlet pipe 30 is connected between the cation exchanger 2 and the carbon remover 3, a third water outlet pipe 32 is connected between the carbon remover 3 and the anion exchanger 5, a fourth water outlet pipe 33 is connected between the anion exchanger 5 and the mixed ion exchanger 6, and a water outlet pipe 26 is connected between the mixed ion exchanger 6 and the demineralized water tank 7. A first circulating pipe 31 is connected between the first water outlet pipe 29 and the second water outlet pipe 30 in a shunting way, a second circulating pipe 34 is connected between the third water outlet pipe 32 and the fourth water outlet pipe 33 in a shunting way, and a third circulating pipe 35 is connected between the third water outlet pipe 32 and the water outlet pipe 26 in a shunting way;
a fresh water pump 10 and a second electric valve 11 are arranged on a first water outlet pipe 29 from the connection part of the first water outlet pipe 29 and a first circulating pipe 31 to the section of the cation exchanger 2, a sodium meter 12 is arranged on a second water outlet pipe 30 from the connection part of the second water outlet pipe 30 and the first circulating pipe 31 to the section of the cation exchanger 2, a third electric valve 13 is arranged on the other section of the second water outlet pipe 30, a fourth electric valve 14 is arranged on the first circulating pipe 31, and the sodium meter 12, the third electric valve 13 and the fourth electric valve 14 are all in communication connection with a cation bed PLC 15. The control of the opening and closing of the sodium meter 12, the third electric valve 13, and the fourth electric valve 14 can be performed by the cation bed PLC controller 15.
An intermediate water pump 16 and a fifth electric valve 17 are arranged on a third water outlet pipe 32 from the connection part of the third water outlet pipe 32 and the second circulating pipe 34 to one section of the anion exchanger 5, a first silicon meter 18 and a first electric conductivity meter 19 are arranged on a fourth water outlet pipe 33 from the connection part of the fourth water outlet pipe 33 and the second circulating pipe 34 to one section of the anion exchanger 5, a sixth electric valve 20 is arranged on the other section of the fourth water outlet pipe 33, a seventh electric valve 21 is arranged on the second circulating pipe 34, and the first silicon meter 18, the first electric conductivity meter 19, the sixth electric valve 20 and the seventh electric valve 21 are all in communication connection with the anion bed PLC controller 22. The opening and closing of the first silicon meter 18, the first conductivity 19, the sixth electric valve 20 and the seventh electric valve 21 can be controlled by the anion bed PLC controller 22.
The joint of the third circulating pipe 35 and the third water outlet pipe 32 is arranged on the third water outlet pipe 32 of the middle water pump 16 section close to the carbon remover 3, the water outlet pipe 26 from the joint of the third circulating pipe 35 and the water outlet pipe 26 to the mixed ion exchanger 6 section is provided with a second silicon meter 23 and a second electric conductivity meter 24, the other water outlet pipe 26 is provided with an eighth electric valve 25, the third circulating pipe 35 is provided with a ninth electric valve 27, and the second silicon meter 23, the second electric conductivity meter 24, the eighth electric valve 25 and the ninth electric valve 27 are all in communication connection with the mixed bed PLC controller 28. The second silicon meter 23, the second conductivity meter 24, the eighth electrically operated valve 25, and the ninth electrically operated valve 27 can be controlled to be opened and closed by the mixed bed PLC controller 28.
In the present case, one end of the first water outlet pipe 29 is disposed at the lower part of the fresh water tank 1, the other end is disposed at the upper part of the cation exchanger 2, one end of the second water outlet pipe 30 is disposed at the bottom of the cation exchanger 2, the other end is disposed at the upper part of the carbon remover 3, one end of the third water outlet pipe 32 is disposed at the lower part of the carbon remover 3, the other end is disposed at the upper part of the anion exchanger 5, one end of the fourth water outlet pipe 33 is disposed at the bottom of the anion exchanger 5, the other end is disposed at the upper part of the mixed ion exchanger 6, one end of the water outlet pipe 26 is disposed at the bottom of the mixed ion exchanger 6, and the other end is disposed at the lower part of the demineralized water tank 7. The first water outlet pipe 29, the second water outlet pipe 30, the third water outlet pipe 32 and the fourth water outlet pipe 33 are installed according to the structure, circulating water can enter from the upper parts of the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6 for fully serial washing, and then flows out from the lower parts of the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6 after washing. The water inlet and the water outlet are respectively arranged below the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6, so that the liquid flows into the next tank body without complete reaction when the secondary desalting system continuously operates.
Preferably, a spraying device is further arranged on the upper parts of the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6, and is respectively connected with the first water outlet pipe 29, the third water outlet pipe 32 and the fourth water outlet pipe 33. The spraying device sprays the liquid onto the resin in the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6 through the first water outlet pipe 29, the third water outlet pipe 32 and the fourth water outlet pipe 33, so that the series washing is fully carried out, the reaction efficiency is improved, and the series washing time is shortened.
In one embodiment, a two-stage desalination ion exchanger cascade washing circulation system and method is provided, wherein the two-stage desalination ion exchanger cascade washing circulation method comprises:
step one, injecting water into a fresh water tank 3: the first electric valve 8 is opened, water is filled into the fresh water tank 1 through the water inlet pipe 9, fresh water with enough liquid level is filled into the fresh water tank 3 after a period of time, and the first electric valve 8 is closed.
Step two, the operation and serial washing of the cation exchanger 2: the third electric valve 13 is closed, the second electric valve 11 and the fourth electric valve 14 are opened, the sodium meter 12 is put into operation, the fresh water pump 10 is started, and fresh water in the fresh water tank 3 flows into the cation exchanger 2 through the first water outlet pipe 29. At the moment, the standby cation exchanger 2 is just put into operation, the index of the fresh water detected by the sodium meter 12 is unqualified, the effluent of the cation exchanger 2 returns to the first water outlet pipe 29 before the fresh water pump 10 through the first circulating pipe 31, and the fresh water pump 10 circularly and serially washes the cation exchanger 2. When the pressure and the flow of the circulating series washing cation exchanger 2 are stable, the cation bed PLC 15 is put into operation. When the index of the sodium meter 12 is qualified, a signal is sent to the cation bed PLC controller, the cation bed PLC controller 15 receives the signal of the sodium meter 12, the third electric valve 13 is controlled to be opened, the fourth electric valve 14 is controlled to be closed, and the water after the serial washing of the cation exchanger 2 flows to the carbon removal device 3 through the second water outlet pipe 30.
Step three, injecting water into the carbon remover 3: after the operation and the serial washing of the cation exchanger 2 are finished, the water discharged from the cation exchanger 2 passes through the second water outlet pipe 30 to the carbon remover 3, the liquid level meter 4 is operated, after a period of time, the carbon remover 3 has enough liquid level, and the water pump 10 is shut down.
Step four, the anion exchanger 5 is put into operation and washed in series: closing the sixth electric valve 20, opening the fifth electric valve 17 and the seventh electric valve 21, commissioning the first silicon meter 18 and the first conductivity meter 19, starting the intermediate water pump 16, wherein the standby anion exchanger 5 is just commissioned at the moment, the indexes detected by the first silicon meter 18 and the first conductivity meter 19 are unqualified, the effluent of the anion exchanger 5 returns to the third water outlet pipe 32 in front of the intermediate water pump 16 through the second circulating pipe 34, and the intermediate water pump 16 works and washes the anion exchanger 5 in series. When the pressure and the flow of the circulating serial washing anion exchanger 5 are stable, the PLC 22 of the anion bed is put into operation. When the first silicon meter 18 and the first conductivity meter 19 detect that the liquid index is qualified, sending a signal to the anion exchanger PLC 22, and the anion exchanger PLC 22 receiving the signals of the first silicon meter 18 and the first conductivity meter 19, controlling to open the sixth electric valve 20 and close the seventh electric valve 21, wherein the water after the serial washing of the anion exchanger 5 flows to the mixed ion exchanger 6 through the fourth water outlet pipe 33.
Step five, putting the mixed ion exchanger 6 into operation and washing the mixed ion exchanger in series: and closing the eighth electric valve 25, opening the ninth electric valve 27, putting the second silicon meter 23 and the second electric conductivity meter 24 into operation, and allowing the effluent of the anion exchanger 5 after the operation and the serial washing to flow to the mixed ion exchanger 6 through the fourth water outlet pipe 33. At this time, the mixed ion exchanger 6 is just put into operation and the indexes detected by the second silicon meter 23 and the second conductivity meter 24 are unqualified, the effluent of the mixed ion exchanger 6 returns to the third water outlet pipe 32 in front of the intermediate water pump 16 through the third circulating pipe 35, and the intermediate water pump 16 operates and washes the mixed ion exchanger 6 in series. When the pressure and the flow of the circulating serial washing mixed ion exchanger 6 are stable, the mixed bed PLC controller 28 is put into operation, when the second silicon meter 23 and the second conductivity meter 24 detect that the liquid indexes are qualified, a signal is sent to the mixed bed PLC controller 28, the mixed bed PLC controller 28 receives the signals of the second silicon meter 23 and the second conductivity meter 24, the eighth electric valve 25 is controlled to be opened, the ninth electric valve 27 is closed, and the water outlet of the mixed ion exchanger 6 flows to the desalting water tank 7 through the water outlet pipe 26.
Step six, continuously operating a secondary desalting system: when the effluent of the mixed ion exchanger 6 flows to the desalted water tank 7 through the drain pipe 26, the serial washing of the secondary desalted ion exchanger is finished, at the moment, the fresh water pump 10 can be started, the first electric valve 8 is opened, the flow of the fresh water pump 10 is adjusted to maintain the stable liquid levels of the fresh water tank 1 and the carbon removal device 3, and the system is in a continuous operation state;
seventhly, stopping the secondary desalting system: when the liquid level of the desalted water tank 7 is enough, the intermediate water pump 16 is stopped, the fresh water pump 10 is stopped, the first electric valve 8 is closed, the sodium meter 12, the first silicon meter 18, the first electric conductivity meter 19, the second silicon meter 23 and the second electric conductivity meter 24 are stopped, the cation exchanger 2, the anion exchanger 5 and the mixed ion exchanger 6 are stopped, and the system is stopped.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. A serial washing circulation system of a secondary desalting ion exchanger comprises a fresh water tank (1), a cation exchanger (2), a decarbonizer (3), an anion exchanger (5) and a desalting water tank (7), wherein a first water outlet pipe (29) is connected and arranged between the fresh water tank (1) and the cation exchanger (2), a second water outlet pipe (30) is connected and arranged between the cation exchanger (2) and the decarbonizer (3), a third water outlet pipe (32) is connected and arranged between the decarbonizer (3) and the anion exchanger (5),
a fourth water outlet pipe (33) is connected between the anion exchanger (5) and the mixed ion exchanger (6) of the mixed ion exchanger (6), and a drain pipe (26) is connected between the mixed ion exchanger (6) and the demineralized water tank (7); a first circulating pipe (31) is connected between the first water outlet pipe (29) and the second water outlet pipe (30) in a shunting manner, a second circulating pipe (34) is connected between the third water outlet pipe (32) and the fourth water outlet pipe (33) in a shunting manner, and a third circulating pipe (35) is connected between the third water outlet pipe (32) and the water outlet pipe (26) in a shunting manner;
a fresh water pump (10) and a second electric valve (11) are arranged on the first water outlet pipe (29) at the section from the connection part of the first water outlet pipe (29) and the first circulating pipe (31) to the cation exchanger (2); a sodium meter (12) is arranged on the second water outlet pipe (30) from the connection part of the second water outlet pipe (30) and the first circulating pipe (31) to one section of the cation exchanger (2), a third electric valve (13) is arranged on the second water outlet pipe (30) at the other section, a fourth electric valve (14) is arranged on the first circulating pipe (31), and the sodium meter (12), the third electric valve (13) and the fourth electric valve (14) are all in communication connection with a cation bed PLC (programmable logic controller) (15);
an intermediate water pump (16) and a fifth electric valve (17) are arranged on the third water outlet pipe (32) from the joint of the third water outlet pipe (32) and the second circulating pipe (34) to one section of the anion exchanger (5), a first silicon meter (18) and a first electric conductivity meter (19) are arranged on the fourth water outlet pipe (33) from the joint of the fourth water outlet pipe (33) and the second circulating pipe (34) to one section of the anion exchanger (5), a sixth electric valve (20) is arranged on the other section of the fourth water outlet pipe (33), a seventh electric valve (21) is arranged on the second circulating pipe (34), and the first silicon meter (18), the first electric conductivity meter (19), the sixth electric valve (20) and the seventh electric valve (21) are all in communication connection with an anion bed PLC (22);
the connection part of the third circulating pipe (35) and the third water outlet pipe (32) is arranged on the third water outlet pipe (32) of the middle water pump (16) close to one section of the carbon remover (3), a second silicon meter (23) and a second electric conductivity meter (24) are arranged on the water outlet pipe (26) from the connection part of the third circulating pipe (35) and the water outlet pipe (26) to one section of the mixed ion exchanger (6), an eighth electric valve (25) is arranged on the water outlet pipe (26) of the other section, a ninth electric valve (27) is arranged on the third circulating pipe (35), and the second silicon meter (23), the second electric conductivity meter (24), the eighth electric valve (25) and the ninth electric valve (27) are all in communication connection with a mixed bed PLC controller (28).
2. The two-stage desalination ion exchanger series washing circulation system of claim 1, wherein one end of the first outlet pipe (29) is disposed at the lower part of the fresh water tank (1), the other end is disposed at the upper part of the cation exchanger (2), one end of the second outlet pipe (30) is disposed at the bottom of the cation exchanger (2), the other end is disposed at the upper part of the decarbonizer (3), one end of the third outlet pipe (32) is disposed at the lower part of the decarbonizer (3), the other end is disposed at the upper part of the anion exchanger (5), one end of the fourth outlet pipe (33) is disposed at the bottom of the anion exchanger (5), the other end is disposed at the upper part of the mixed ion exchanger (6), one end of the outlet pipe (26) is disposed at the bottom of the mixed ion exchanger (6), the other end is arranged at the lower part of the demineralized water tank (7).
3. The tandem washing circulation system of the two-stage desalination ion exchanger of claim 1, wherein a spraying device is arranged at the upper part of the cation exchanger (2), the anion exchanger (5) and the mixed ion exchanger (6) and is respectively connected with the first water outlet pipe (29), the third water outlet pipe (32) and the fourth water outlet pipe (33).
4. A two-stage desalination ion exchanger series scrubbing circulation system as claimed in claim 1 wherein a level gauge (4) is provided in the solution tank of said decarbonizer (3).
5. A method of cascade washing circulation of a secondary desalted ion exchanger using the system as set forth in any one of claims 1 to 4,
s1, filling water into the fresh water tank (3): opening the first electric valve (8), filling water into the fresh water tank (1) through the water inlet pipe (9), and closing the first electric valve (8) when fresh water with enough liquid level exists in the fresh water tank (3) after a period of time;
s2, putting the cation exchanger (2) into operation and washing in series: closing the third electric valve (13), opening the second electric valve (11) and the fourth electric valve (14), commissioning the sodium meter (12), starting the fresh water pump (10), circularly serially washing the cation exchanger (2), commissioning the cation bed PLC controller (15), receiving a signal of the sodium meter (12) by the cation bed PLC controller (15), opening the third electric valve (13), and closing the fourth electric valve (14);
s3, injecting water into the carbon remover (3): after the operation and the serial washing of the cation exchanger (2) are finished, the effluent of the cation exchanger (2) passes through the second water outlet pipe (30) to the carbon remover (3), the liquid level meter (3) is put into operation, after a period of time, enough liquid level exists in the carbon remover (3), and the water pump (10) is stopped;
s4, the anion exchanger (5) is put into operation and washed in series: closing the sixth electric valve (20), opening the fifth electric valve (17) and the seventh electric valve (21), commissioning the first silicon meter (18) and the first conductivity meter (19), starting the intermediate water pump (16), circulating and washing the anion exchanger (5), commissioning the anion bed PLC controller (22), the anion bed PLC controller (22) receiving the signals of the first silicon meter (18) and the first conductivity meter (19), opening the sixth electric valve (20), closing the seventh electric valve (21);
s5, putting the mixed ion exchanger (6) into operation and washing in series: closing the eighth electric valve (25), opening the ninth electric valve (27), commissioning the second silicon meter (23) and the second electric conductivity meter (24), after commissioning and serial washing of the anion exchanger (5), enabling effluent of the anion exchanger to flow to the hybrid ion exchanger (6) through the fourth water outlet pipe (33), serially washing the hybrid ion exchanger (6) through the working cycle of the intermediate water pump (16), commissioning the mixed bed PLC (28), receiving signals of the second silicon meter (23) and the second electric conductivity meter (24) by the mixed bed PLC (28), opening the eighth electric valve (25), and closing the ninth electric valve (27);
s6, continuously operating the secondary desalting system: when the outlet water of the mixed ion exchanger (6) flows to the desalted water tank (7) through the drain pipe (26), the serial washing of the secondary desalted ion exchanger is finished, at the moment, the fresh water pump (10) can be started, the first electric valve (8) is opened, the flow of the fresh water pump (10) is adjusted to maintain the liquid levels of the fresh water tank (1) and the carbon remover (3) to be stable, and the system is in a continuous operation state;
s7, stopping the secondary desalting system: when the liquid level of the desalted water tank (7) is enough, the intermediate water pump (16) is shut down, the fresh water pump (10) is shut down, the first electric valve (8) is closed, the sodium meter (12), the first silicon meter (18), the first conductivity meter (19), the second silicon meter (23) and the second conductivity meter (24) are shut down, the cation exchanger (2), the anion exchanger (5) and the mixed ion exchanger (6) are shut down, and the system is shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210735713.7A CN115057502A (en) | 2022-06-27 | 2022-06-27 | Series washing circulating system and method for secondary desalting ion exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210735713.7A CN115057502A (en) | 2022-06-27 | 2022-06-27 | Series washing circulating system and method for secondary desalting ion exchanger |
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| CN115057502A true CN115057502A (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210735713.7A Pending CN115057502A (en) | 2022-06-27 | 2022-06-27 | Series washing circulating system and method for secondary desalting ion exchanger |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649460A (en) * | 2013-11-25 | 2015-05-27 | 常州市江南环保设备有限公司 | Pretreatment and ion exchange desalination system |
| CN206587767U (en) * | 2016-12-30 | 2017-10-27 | 中粮融氏生物科技有限公司 | A kind of ion exchange string wash water circulatory system |
| CN111039353A (en) * | 2020-01-04 | 2020-04-21 | 西安热工研究院有限公司 | Secondary desalting operation control system and method |
| CN217756961U (en) * | 2022-06-27 | 2022-11-08 | 华电邹县发电有限公司 | Circulation system is washed to second grade desalination ion exchanger cluster |
-
2022
- 2022-06-27 CN CN202210735713.7A patent/CN115057502A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104649460A (en) * | 2013-11-25 | 2015-05-27 | 常州市江南环保设备有限公司 | Pretreatment and ion exchange desalination system |
| CN206587767U (en) * | 2016-12-30 | 2017-10-27 | 中粮融氏生物科技有限公司 | A kind of ion exchange string wash water circulatory system |
| CN111039353A (en) * | 2020-01-04 | 2020-04-21 | 西安热工研究院有限公司 | Secondary desalting operation control system and method |
| CN217756961U (en) * | 2022-06-27 | 2022-11-08 | 华电邹县发电有限公司 | Circulation system is washed to second grade desalination ion exchanger cluster |
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