CN212076509U - A regeneration system that is arranged in demineralized water preparation in-process positive bed - Google Patents
A regeneration system that is arranged in demineralized water preparation in-process positive bed Download PDFInfo
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- CN212076509U CN212076509U CN202020349863.0U CN202020349863U CN212076509U CN 212076509 U CN212076509 U CN 212076509U CN 202020349863 U CN202020349863 U CN 202020349863U CN 212076509 U CN212076509 U CN 212076509U
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Abstract
The utility model discloses a regeneration system for sunny bed in demineralized water preparation process belongs to demineralized water production field technical field. The device is arranged in a demineralized water preparation system, the regeneration system comprises an anode bed, a regeneration liquid dilution tank and a regeneration liquid storage tank, a liquid outlet pipe is connected with a liquid outlet pipe, the liquid outlet pipe is communicated with a dilution pipe I, and the liquid outlet pipe is connected with the regeneration liquid dilution tank through the dilution pipe I; the regenerated liquid diluting tank is connected with the cation bed regenerated liquid inlet through a regenerated liquid pipe, and a passage is formed among the cation bed, the cation bed liquid outlet, the liquid outlet pipe, the diluting pipe I, the regenerated liquid diluting tank, the regenerated liquid pipe and the cation bed regenerated liquid inlet; and the regeneration liquid dilution tank is connected with the regeneration liquid storage tank. The method has the advantages that hydrogen ions generated in the cation bed operation process are fully utilized, circular economy is formed, the purpose of saving energy consumption is achieved, meanwhile, unnecessary energy consumption loss in the demineralized water preparation process is effectively reduced, the operation load of a demineralized water preparation system in the process operation is reduced, and the energy consumption is saved.
Description
Technical Field
The utility model relates to a regeneration system that is arranged in the demineralized water preparation in-process cation bed especially relates to a regeneration system that is arranged in the demineralized water preparation, but resources are saved, adopt ion exchange mode cation bed, belongs to demineralized water production technical field.
Background
In the initial stage of the desalted water preparation, a distillation method with high energy consumption and high cost is mainly adopted; then, with the development of artificial synthetic resin technology, the technology for preparing desalted water by a chemical method taking ion exchange resin as a core is developed, and high-purity water with the conductivity of 0.055 mu s/cm close to that of theoretical pure water can be produced. The ion exchange desalting is to utilize exchangeable hydrogen ion and hydroxyl ion on ion exchange resin to exchange with dissolved salt in water to eliminate salt in water.
The ion exchange process can be regarded as a chemical displacement reaction between the ion exchange resin in the solid phase and the electrolyte in the liquid phase, and due to the limited exchange capacity of the ion exchange resin and the reversibility of the ion exchange reaction, the ion exchange resin can be recycled by exchange adsorption and regeneration, and the process can be generally divided into five continuous stages: firstly, diffusing exchange ions from a solution to the surface of resin particles; diffusion of exchange ions inside the resin particles; thirdly, the exchange ions react with the exchangeable ions combined on the resin active groups; diffusing the exchanged ions in the resin particles; diffusing the exchanged ions in the solution. The ion exchange reaction speed is very high, and when the ion exchange resin reaches adsorption saturation, strong acid or strong base is adopted to exchange with the adsorbed ions, so that the regeneration of the ion exchange resin is realized.
At present, in the process of preparing the desalted water, all the diluting media used by the cation bed regeneration liquid are desalted water, the total amount of the desalted water consumed per year is about 4.1 ten thousand tons, so that the sodium hydroxide consumption is directly increased by about 5.74 tons, and the running cost of cation bed regeneration in the process of preparing the desalted water is greatly increased.
In 2019, 08 and 02, a patent document with publication number CN209188801U, entitled "a cation bed cleaning device applied to preparation of viscose fiber desalted water" is disclosed, wherein the patent document discloses: the cleaning device comprises a cation bed, a carbon remover, an intermediate water tank, an intermediate water pump, a cation bed and a desalting water tank, wherein the carbon remover is connected with a cation bed water outlet, the carbon remover is connected with the intermediate water tank, the intermediate water tank is connected with two intermediate water pumps, the water pump is connected with the anion bed water inlet, the desalting water tank is connected with the anion bed water outlet, the desalting water tank is connected with two backwashing pumps, the backwashing pumps are connected with the cation bed water inlet through a pipeline, the intermediate water pump water outlet is connected with the cation bed water inlet, and the cation bed water inlet is provided with a. The utility model discloses a through the weak acid water that produces the cation bed not through the cloudy bed consumption and directly be used for wasing the cation bed, reduced a large amount of water resources and the sodium hydroxide of loss in the original technology. However, in the solution of the patent document, the weakly acidic water generated from the cation bed is further processed by the decarbonizer, the intermediate water tank, and the intermediate water pump, which consumes electric power for driving the decarbonizer, the intermediate water tank, and the intermediate water pump, and also consumes operation of the components such as the decarbonizer.
Disclosure of Invention
The inventor discovers in research that according to the actual operation process of the cation bed, in the operation process of the cation bed, the effluent of the cation bed is acidic and has low sodium ion content, and the sodium ion content is close to the sodium ion content in the desalted water of a finished product, therefore, the effluent of the cation bed is directly adopted to dilute the cation bed regeneration liquid in the regeneration liquid storage tank, and the purposes of saving energy consumption and cost of sodium hydroxide, hydrochloric acid, intermediate steps and the like are further achieved; and through the setting of pH meter and sodium ion detector, the content of material in the cation bed outlet water of real time monitoring, when content does not accord with the diluent requirement (set up according to actual demand), through the switching of valve, rethread demineralized water preparation system (decarbonizer, water tank and anion bed) is handled the diluent, is used for diluting the regeneration liquid again, accomplishes the regeneration to the cation bed at last, consequently provides a regeneration system that is arranged in the cation bed of demineralized water preparation in-process.
In order to achieve the technical purpose, the following technical scheme is proposed:
a regeneration system for a cation bed in a demineralized water preparation process is arranged in the demineralized water preparation system and comprises the cation bed, a regenerated liquid dilution tank and a regenerated liquid storage tank, wherein a liquid outlet of the cation bed is connected with a liquid outlet pipe, the liquid outlet pipe is communicated with a dilution pipe I, and the liquid outlet pipe is connected with the regenerated liquid dilution tank through the dilution pipe I; the regenerated liquid diluting tank is connected with the cation bed regenerated liquid inlet through a regenerated liquid pipe, and a passage is formed among the cation bed, the cation bed liquid outlet, the liquid outlet pipe, the diluting pipe I, the regenerated liquid diluting tank, the regenerated liquid pipe and the cation bed regenerated liquid inlet; and the regeneration liquid dilution tank is connected with the regeneration liquid storage tank.
Further, the demineralized water preparation system comprises a carbon remover for removing carbon dioxide, a water tank for temporarily storing, an anion bed and a demineralized water storage tank, wherein the carbon remover is connected with the cation bed through a liquid outlet pipe, the carbon remover is connected with the water tank through a conveying pipe, the water tank is connected with an inlet of the anion bed through the conveying pipe, and an outlet of the anion bed is connected with the demineralized water storage tank through a demineralized water pipe; and the demineralized water storage pool is connected with the regenerated liquid dilution tank through a dilution pipe II.
Furthermore, a water pump is arranged on the conveying pipe between the water tank and the inlet of the anion bed.
Furthermore, the water pumps are multiple and are arranged in parallel.
Furthermore, a booster pump is arranged on the dilution pipe II.
Furthermore, the booster pumps are multiple, and the booster pumps are connected in parallel.
Furthermore, a regeneration pump and a regeneration valve are arranged on the regeneration liquid pipe.
Furthermore, a water outlet valve is arranged on the liquid outlet pipe.
Furthermore, a pH meter and a sodium ion detector are arranged on the liquid outlet pipe.
By adopting the technical scheme, the beneficial technical effects brought are as follows:
1) the utility model discloses in, this regeneration system is based on the cation bed and goes out water sodium ion content low at the operation in-process, and has acidic characteristics, dilutes cation bed regeneration liquid, retrencies the purpose of system's technology and saving energy consumption in reaching the production process. The cation bed is directly connected with the dilution tank, so that the operation load of the anion bed can be effectively reduced; the effluent of the cation bed directly enters a dilution tank, so that the total water quantity entering a carbon remover and an anion bed is reduced, and the consumption of sodium hydroxide can be effectively reduced;
2) in the utility model, through the arrangement of the cation bed, the regeneration liquid diluting tank and the regeneration liquid storage tank, the hydrogen ions generated in the operation process of the cation bed are fully utilized to form circular economy, thereby realizing the purpose of saving energy consumption, simultaneously, effectively reducing unnecessary energy consumption loss in the preparation process of the demineralized water, reducing the operation load of the demineralized water preparation system in the process operation and saving energy consumption;
3) in the utility model, through the arrangement of the cation bed liquid outlet, the liquid outlet pipe, the dilution pipe I, the regeneration liquid pipe and the cation bed regeneration liquid inlet, on one hand, a medium circulation passage is formed, on the other hand, the orderly control of the cation bed regeneration system is realized, and the stability and controllability of the regeneration process are improved;
4) the regeneration system is arranged in the demineralized water preparation system, and equipment does not need to be arranged independently, so that the maximum utilization of the existing equipment is realized, the production space is saved, the cation bed can be regenerated in the online preparation process of the demineralized water, and the stability and sustainability of the demineralized water preparation process are effectively ensured;
5) the utility model discloses in, through the setting of pH meter and sodium ion detector, the content of real time monitoring cation bed play aquatic hydrogen ion and sodium ion, when the content does not accord with the diluent requirement (set up according to the actual demand), through the switching of valve, rethread demineralized water preparation system (decarbonizer, water tank and anion bed) is handled the diluent, is used for the dilution to the regeneration liquid again, accomplishes the regeneration to the cation bed at last, provides the powerful guarantee to going on smoothly of cation bed regeneration technology, and then makes the alternative for the dilution of regeneration liquid;
6) the utility model discloses in, through setting up such as water pump, booster pump, regenerative pump, regeneration valve and outlet valve, the control of being convenient for is to the transport of medium in the pipeline, realizes going on the cation bed regeneration technology's stability, smoothly.
Drawings
FIG. 1 is a schematic diagram of the logic connection of the present invention;
the device comprises a cation bed 1, a cation bed 2, a liquid outlet pipe 3, a dilution pipe I, a dilution pipe 4, a regeneration liquid dilution tank 5, a regeneration liquid pipe 6, a regeneration liquid storage tank 7, a carbon remover 8, a water tank 9, an anion bed 10, a demineralized water storage tank 11, a delivery pipe 12, a demineralized water pipe 13, a dilution pipe II, a dilution pipe 14, a water pump 15, a booster pump 16, a regeneration pump 17, a regeneration valve 18, a water outlet valve 19, a pH meter 20 and a sodium ion detector.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
A regeneration system for a cation bed in a demineralized water preparation process is arranged in the demineralized water preparation system and comprises a cation bed 1, a regenerated liquid dilution tank 4 and a regenerated liquid storage tank 6, wherein a liquid outlet of the cation bed 1 is connected with a liquid outlet pipe 2, the liquid outlet pipe 2 is communicated with a dilution pipe I3, and the liquid outlet pipe 2 is connected with the regenerated liquid dilution tank 4 through the dilution pipe I3; the regenerated liquid dilution tank 4 is connected with a regenerated liquid inlet of the cation bed 1 through a regenerated liquid pipe 5, and a passage is formed among the cation bed 1, a liquid outlet of the cation bed 1, a liquid outlet pipe 2, a dilution pipe I3, the regenerated liquid dilution tank 4, the regenerated liquid pipe 5 and the regenerated liquid inlet of the cation bed 1; and the regeneration liquid dilution tank 4 is connected with a regeneration liquid storage tank 6.
Example 2
Based on example 1, further,
the system for preparing the demineralized water comprises a carbon dioxide remover 7 for removing carbon dioxide, a water tank 8 for temporarily storing, an anion bed 9 and a demineralized water storage tank 10, wherein the carbon dioxide remover 7 is connected with the cation bed 1 through a liquid outlet pipe 2, the carbon remover 7 is connected with the water tank 8 through a conveying pipe 11, the water tank 8 is connected with an inlet of the anion bed 9 through the conveying pipe 11, and an outlet of the anion bed 9 is connected with the demineralized water storage tank 10 through a demineralized water pipe 12; the demineralized water storage pool 10 is connected with the regeneration liquid dilution tank 4 through a dilution pipe II 13.
According to actual requirements, valves and delivery pumps are arranged on the pipelines.
Example 3
Based on example 2, it is further preferred that,
a water pump 14 is arranged on the delivery pipe 11 between the water tank 8 and the inlet of the anion bed 9, and a booster pump 15 is arranged on the dilution pipe II 13.
Example 4
Based on example 3, it is further preferred that,
two water pumps 14 are arranged, and the water pumps 14 are connected in parallel; the number of the booster pumps 15 is two, and the booster pumps 15 are arranged in parallel with each other between the booster pumps 15.
Example 5
Based on example 4, it is further preferred that,
a regeneration pump 16 and a regeneration valve 17 are arranged on the regeneration liquid pipe 5; the liquid outlet pipe 2 is provided with a water outlet valve 18.
Example 6
Based on the embodiments 1-5, a pH meter and a sodium ion detector are arranged on the liquid outlet pipe, and then the technical scheme is further explained.
As shown in fig. 1: during the operation of the cation bed 1, a large amount of hydrogen ions (pH value is 2-3.3) can be generated, and the content of sodium ions in effluent is extremely low (< 50 ug/L); based on the whole demineralized water preparation process, the ion content in the effluent of the cation bed 1 directly influences the sodium content of the demineralized water, and the anion bed 9 does not participate in the exchange and reaction of sodium ions in the running process.
In the regeneration system in the technical scheme, the outlet valve 18 on the liquid outlet pipe 2 is opened, the diluting pipe I3 is utilized to introduce effluent of the cation bed 1 into the regenerated liquid diluting tank 4 (the pH value is 2-3.3, the content of sodium ions is less than 50ug/L, and the pressure is greater than 0.1 MPa), meanwhile, hydrochloric acid (the content of hydrogen ions is greater than 31%) is introduced into the regenerated liquid diluting tank 4 through the regenerated liquid storage tank 6, and when the concentration of the hydrochloric acid in the regenerated liquid diluting tank 4 is 1-3%, the regeneration pump 16 and the regeneration valve 17 on the regenerated liquid pipe 5 are opened to regenerate the cation bed 1.
Example 7
This embodiment is designed to serve as a control example of embodiment 6 on one hand, and to serve as a backup scheme for the cation bed regeneration system on the other hand, so as to allow the cation bed regeneration process to be smoothly and stably performed.
As shown in fig. 1: detected by a pH meter 19 and a sodium ion detector 20, a standby regeneration system, namely a regeneration system in the prior art, is switched, a water outlet valve 18 on a liquid outlet pipe 2 is opened, a water pump 14 is started, the outlet water of the cation bed 1 is subjected to carbon dioxide removal by a carbon remover 7, is temporarily stored by a water tank 8 and is treated by an anion bed 9; the desalted water produced by the anion bed 9 enters a desalted water tank, when the cation bed 1 needs to be regenerated, a booster pump 15 is started to dilute hydrochloric acid (hydrogen ion content is more than 31%) in a regenerated liquid dilution tank 4, and when the dilution concentration reaches 1-3%, a regeneration pump 16 and a regeneration valve 17 on a regeneration liquid pipe 5 are opened to regenerate the cation bed 1.
The comparison between example 6 and example 7, performed and compared, gave the following results, as shown in table 1 below:
(1) the total amount of the water entering the anion bed 9 is reduced: 7.5 cubes/15/d 365d =41062 m;
(2) the total amount of the regeneration medium (sodium hydroxide) of the anion bed 9 is directly saved as follows: 4.1 ten thousand tons of water 1.4 ton/ten thousand ton of water =5.74 ton, in terms of amount: 1.87 ten thousand yuan/year;
(3) can effectively reduce the operation of the booster pump 15, save the electric energy: 11KW 18H 365d =72270 DEG electricity, and the equivalent sum is 3.6 ten thousand yuan/year;
(4) the total amount of the hydrochloric acid is directly saved as follows: na n =36.5g/mol 0.01 mol/L7.5 m rapid harvest 1000L 15 station 365d =14.98 ton, reduced to hydrochloric acid procurement cost 0.8 ten thousand yuan/year;
(5) for carbon remover 7, the cost is mainly the fixed asset of the equipment and the use cost of internal packing, and the electric energy can be saved by 1710 degrees electricity/year according to the calculation of 'year saving 41062m for water passing, fan 7.5KW for carbon remover 7, 5500m for wind rate/h for water output of 180m sunny bed 1 for cultivation';
(6) the average running power of the water pump 14 for configuring the regeneration liquid of the cation bed 1 is 11kw, the water pump 14 needs to run for a long time in the regeneration process of the cation bed 1, and the annual power consumption is 72270 degrees when the average running time of the water pump is 18 hours.
After the process is optimized and improved, the total benefit is reduced to 6.27 ten thousand yuan/year.
Claims (9)
1. A regeneration system for a cation bed in a process of preparing desalted water, which is characterized in that: the device is arranged in a demineralized water preparation system, the regeneration system comprises a cation bed (1), a regeneration liquid dilution tank (4) and a regeneration liquid storage tank (6), a liquid outlet of the cation bed (1) is connected with a liquid outlet pipe (2), the liquid outlet pipe (2) is communicated with a dilution pipe I (3), and the liquid outlet pipe (2) is connected with the regeneration liquid dilution tank (4) through the dilution pipe I (3); the regenerated liquid dilution tank (4) is connected with a regenerated liquid inlet of the cation bed (1) through a regenerated liquid pipe (5), and a passage is formed among the cation bed (1), a liquid outlet of the cation bed (1), a liquid outlet pipe (2), a dilution pipe I (3), the regenerated liquid dilution tank (4), the regenerated liquid pipe (5) and the regenerated liquid inlet of the cation bed (1); the regeneration liquid dilution tank (4) is connected with the regeneration liquid storage tank (6).
2. The regeneration system for a cation bed in a demineralized water preparation process according to claim 1, characterized in that: the system for preparing the demineralized water comprises a carbon dioxide remover (7) for removing carbon dioxide, a water tank (8) for temporarily storing, an anion bed (9) and a demineralized water storage pool (10), wherein the carbon dioxide remover (7) is connected with the cation bed (1) through a liquid outlet pipe (2), the carbon remover (7) is connected with the water tank (8) through a conveying pipe (11), the water tank (8) is connected with an inlet of the anion bed (9) through the conveying pipe (11), and an outlet of the anion bed (9) is connected with the demineralized water storage pool (10) through a demineralized water pipe (12); the demineralized water storage pool (10) is connected with the regenerated liquid dilution tank (4) through a dilution pipe II (13).
3. The regeneration system for a cation bed in a demineralized water preparation process according to claim 2, characterized in that: a water pump (14) is arranged on the conveying pipe (11) between the water tank (8) and the inlet of the anion bed (9).
4. The regeneration system for a cation bed in a demineralized water preparation process according to claim 3, characterized in that: the water pumps (14) are arranged in parallel, and the water pumps (14) are connected with each other in parallel.
5. The regeneration system for a cation bed in a demineralized water preparation process according to claim 2, characterized in that: and a booster pump (15) is arranged on the dilution pipe II (13).
6. The regeneration system for a cation bed in a demineralized water preparation process according to claim 5, characterized in that: the booster pumps (15) are multiple, and the booster pumps (15) are connected with the booster pumps (15) in parallel.
7. The regeneration system for a cation bed in a demineralized water preparation process according to claim 1, characterized in that: and a regeneration pump (16) and a regeneration valve (17) are arranged on the regeneration liquid pipe (5).
8. The regeneration system for a cation bed in a demineralized water preparation process according to claim 1, characterized in that: and a water outlet valve (18) is arranged on the liquid outlet pipe (2).
9. The regeneration system for a cation bed in a demineralized water preparation process according to any one of claims 1 to 8, characterized in that: and a pH meter (19) and a sodium ion detector (20) are arranged on the liquid outlet pipe (2).
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