CN214764611U - Ammonia water preparation device for regeneration of condensed water fine treatment ion exchange resin - Google Patents
Ammonia water preparation device for regeneration of condensed water fine treatment ion exchange resin Download PDFInfo
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- CN214764611U CN214764611U CN202120900749.7U CN202120900749U CN214764611U CN 214764611 U CN214764611 U CN 214764611U CN 202120900749 U CN202120900749 U CN 202120900749U CN 214764611 U CN214764611 U CN 214764611U
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Abstract
The utility model discloses an ammonia water configuration device for regenerating condensed water fine treatment ion exchange resin, which belongs to the technical field of water treatment and comprises a liquid ammonia mixer, a liquid ammonia tank, an ammonia water tank, a circulating booster pump and a desalting water tank; the liquid ammonia tank is connected with the liquid ammonia mixer through a first pipeline; the ammonia water tank is connected with the liquid ammonia mixer through a second pipeline; the circulating booster pump is connected with the liquid ammonia mixer through a third pipeline, and an ammonia water outlet pipeline is arranged on the third pipeline; the ammonia water tank is connected with the circulating booster pump through a pipeline IV and a pipeline V which are arranged in sequence; the desalting water tank is connected to the junction of the pipeline four and the pipeline five through a pipeline six, and an exhaust pipeline I is arranged between the desalting water tank and the ammonia water tank; the desalting water tank is also provided with a second exhaust pipeline. The utility model discloses simplify the device, reduce the energy consumption, pollution abatement, it is safer, convenient to use, is suitable for power plant condensate polishing ion exchange resin regeneration.
Description
Technical Field
The utility model relates to a handle technical field, more specifically the ammonia water configuration device for condensate polishing ion exchange resin regeneration that says so.
Background
In the traditional ammonia water preparation process, liquid ammonia is used for absorbing heat and evaporating the liquid ammonia into gas ammonia, and the gas ammonia is released and dissolved in water to form ammonia water. The disadvantages of this process are that liquid ammonia gasification requires heating and gaseous ammonia dissolution requires cooling. The heating and cooling heat exchange units not only consume large energy, but also have complex process and huge device. In addition, the gas ammonia dissolving process can generate tail gas containing gas ammonia; in order to avoid tail gas from escaping, a tail gas absorption device must be added, so that the ammonia water preparation device is more complex and huge. In the process of preparing ammonia water by directly contacting and dissolving liquid ammonia and water in the current research, the heat absorbed in the evaporation process of the liquid ammonia can partially offset the heat released in the dissolving process of the gas ammonia, and a heat exchange component in an ammonia water preparation device is omitted or simplified. The application of the technology has risks because the gas ammonia carried by the liquid ammonia generates strong sound and vibration when dissolved and disappeared in the ammonia water preparation process, and the practical application is few.
The ammonia water used for regenerating the ion exchange resin in the condensate water fine treatment process of the power plant requires accurate concentration and high purity, no ammonia water preparation device meeting the requirements is provided at present, and the purity of the commercially available ammonia water cannot meet the quality requirement of the ammonia water for regenerating the ion exchange resin in the condensate water fine treatment process of the power plant. The ammonia water preparation device adopting the traditional process is not suitable for the regeneration field use of the ion exchange resin in the condensation water fine treatment process of the power plant due to the complex process and the huge device.
Therefore, no ammonia water preparation device which can meet the technical requirement of the ammonia water for regenerating ion exchange resin in the condensation water fine treatment process of a power plant exists at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a condensate polishing ion exchange resin regeneration is with aqueous ammonia configuration device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an ammonia water preparation device for regenerating condensed water fine treatment ion exchange resin comprises a liquid ammonia mixer, a liquid ammonia tank, an ammonia water tank, a circulating booster pump and a desalting water tank;
the liquid ammonia tank is connected with the liquid ammonia mixer through a first pipeline;
the ammonia water tank is connected with the liquid ammonia mixer through a second pipeline;
the circulating booster pump is connected with the liquid ammonia mixer through a third pipeline, and an ammonia water outlet pipeline is arranged on the third pipeline;
the ammonia water tank is connected with the circulating booster pump through a pipeline IV and a pipeline V which are arranged in sequence;
the desalting water tank is connected to the junction of the pipeline four and the pipeline five through a pipeline six, and an exhaust pipeline I is arranged between the desalting water tank and the ammonia water tank; the desalting water tank is also provided with a second exhaust pipeline.
The utility model discloses form circulation circuit through the pipeline between ammonia water tank, liquid ammonia blender and the circulation booster pump, the liquid ammonia jar passes through the tube coupling liquid ammonia blender for when dissolving liquid ammonia in the demineralized water, large-traffic circulation demineralized water (or rare aqueous ammonia) and low dose liquid ammonia direct mixing have avoided once preparing in the traditional handicraft that the aqueous ammonia temperature that the process aqueous ammonia is exothermic in a large number and leads to rises by a wide margin, the device is strong and drawbacks such as sound and vibration.
The desalted water (or dilute ammonia water) is mixed with a small amount of liquid ammonia in the circulating flow process, so that the ammonia water with higher concentration accuracy can be prepared.
Liquid ammonia and demineralized water (or weak ammonia water) direct contact dissolve, save liquid ammonia gasification heating and two relevant indirect heating equipment of step or part of gas ammonia solution cooling, simplify the structure, reduce the energy consumption.
Preferably, the liquid ammonia mixer is any device capable of rapidly mixing liquid ammonia and demineralized water (or dilute ammonia water), and a commercially available pipeline mixer, venturi ejector or other common products can be used.
Preferably, the first pipeline is provided with a throttling decompression device, a liquid ammonia outlet valve, a liquid ammonia flow regulating valve and a liquid ammonia flowmeter;
a circulating flow regulating valve is arranged on the pipeline III;
the ammonia water outlet pipeline is arranged between the circulating flow regulating valve and the circulating booster pump, and is provided with an ammonia water outlet valve;
an outlet valve of the ammonia water tank is arranged on the pipeline IV;
a conductivity meter and an ammonia water flowmeter are arranged on the pipeline five;
an outlet valve of the desalting water tank is arranged on the pipeline six;
the first exhaust pipeline is provided with a first exhaust valve.
Preferably, the ammonia water tank is provided with a liquid level meter, a pressure gauge and a safety valve.
Preferably, the demineralized water tank is provided with a liquid level meter and a demineralized water inlet pipeline;
a desalted water inlet pipeline is provided with a desalted water tank inlet valve, and one end of the desalted water inlet pipeline communicated to the inside of the desalted water tank is connected with a desalted water inlet nozzle;
and a second exhaust valve is arranged on the second exhaust pipeline.
The tail gas discharged from the ammonia water tank in the ammonia water preparation process is discharged from the demineralized water tank, the ammonia gas is absorbed by the demineralized water sprayed from a demineralized water inlet nozzle in the demineralized water tank, the tail gas does not pollute the environment, and a tail gas absorption treatment unit is omitted, so that the ammonia water preparation device for the condensate polishing ion exchange resin regeneration is suitable for preparing ammonia water in a closed workshop and regenerating the condensate polishing ion exchange resin in a power plant.
The preparation method of the ammonia water for regenerating the condensed water fine treatment ion exchange resin by using the device comprises the following steps:
(1) determining the set water level of the ammonia water tank according to the desalted water amount in the ammonia water required by regeneration of the condensed water fine treatment ion exchange resin;
(2) opening an exhaust pipeline II, and introducing demineralized water into the demineralized water tank, so that the demineralized water flows into the ammonia tank along a pipeline six, a pipeline five, the circulating booster pump, a pipeline three, the liquid ammonia mixer and a pipeline two;
(3) when the water level of the ammonia water tank reaches a set water level, closing the pipeline six, and opening the pipeline four and the exhaust pipeline one to enable the desalted water to circularly flow among the ammonia water tank, the circulating booster pump and the liquid ammonia mixer;
(4) and opening the first pipeline to enable liquid ammonia in the liquid ammonia tank to enter the liquid ammonia mixer to be mixed with the desalted water or the dilute ammonia water and then flow into the ammonia water tank. The prepared diluted ammonia water is further mixed in the circulating flow process among the ammonia water tank, the circulating booster pump and the liquid ammonia mixer, and the concentration and the conductivity are continuously increased;
(5) and when the conductivity of the prepared ammonia water reaches a set conductivity value, the ammonia water is prepared for standby.
Preferably, after the sixth pipeline is closed in the step (3), when the desalting water tank reaches the highest water level, the introduction of the desalting water is stopped, and the second exhaust pipeline is closed.
Preferably, the flow rate of the liquid ammonia in the step (4) is set to be 1-2% of the circulating flow rate of the demineralized water or the ammonia water, and a small proportion of the liquid ammonia can ensure that the liquid ammonia is fully absorbed by the demineralized water (or the ammonia water), so that the loss of the ammonia discharged along with the tail gas is reduced, and the temperature rise amplitude in the liquid ammonia dissolving process is reduced.
The method for regenerating the condensed water refining ion exchange resin by using the device comprises the following steps:
1) preparing ammonia water according to the method;
2) opening an exhaust pipeline II, introducing demineralized water into the demineralized water tank, and enabling the demineralized water to flow out along a pipeline six, a pipeline five, a circulating booster pump, a pipeline three and an ammonia water outlet pipeline for backwashing the ion exchange resin;
3) after backwashing is finished, closing the pipeline six, opening the pipeline four and the exhaust pipeline one, and enabling ammonia water to flow out along the pipeline four, the pipeline five, the circulating booster pump, the pipeline three and an ammonia water outlet pipeline for regenerating ion exchange resin;
4) after the ammonia water is used, closing the pipeline IV and the exhaust pipeline I, and opening the pipeline VI to enable desalted water to flow out of the ammonia water outlet pipeline for replacing the regenerated waste liquid and the residual ammonia water in the ion exchange resin;
5) after the completion of the displacement, the ion exchange resin was subjected to a forward washing with demineralized water.
NH3·H2NH formed by dissociation of O in water4 +Regenerating the cation exchange resin to dissociate the OH formed－Regeneration anion exchange resin uses the utility model discloses the ion exchange resin regeneration overall process in the condensate fine treatment device can be accomplished to the device, including steps such as backwash, regeneration, replacement, positive washing, simple structure, convenient operation.
Preferably, in the step 3), after the sixth pipeline is closed, when the demineralized water tank reaches the highest water level, the introduction of the demineralized water is stopped.
Preferably, the replacement time is 1 to 1.5 times the regeneration time.
According to the above technical scheme, the utility model discloses a condensate polishing ion exchange resin regenerating unit's structure is simplified, can reduce the energy consumption, and the pollution abatement uses safelyr, convenience more, is suitable for power plant condensate polishing ion exchange resin regeneration to use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Figure 1 is a schematic structural diagram of the ammonia water preparation device of the utility model.
Figure 2 is the pipeline connection schematic diagram of the ammonia water preparation device of the utility model.
Reference numerals:
1. a liquid ammonia mixer; 2. a liquid ammonia tank; 3. an ammonia water tank; 4. a circulating booster pump; 5. a demineralized water tank;
101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 201. an ammonia water outlet pipeline; 301. a first exhaust pipeline; 401. a second exhaust pipeline; 501. a demineralized water inlet pipeline;
11. a circulation flow regulating valve; 21. a throttling pressure reducing device; 22. a liquid ammonia outlet valve; 23. a liquid ammonia flow regulating valve; 24. a liquid ammonia flow meter; 31. a liquid level meter of an ammonia water tank; 32. a pressure gauge; 33. a first exhaust valve; 34. a safety valve; 35. an ammonia tank outlet valve; 36. a conductivity meter; 37. an ammonia flowmeter; 41. an ammonia outlet valve; 42. an ammonia water outlet; 51. an outlet valve of the demineralized water tank; 52. a second exhaust valve; 53. a demineralized water inlet nozzle; 54. a demineralized water tank inlet valve; 55. a desalted water tank level meter; 56. a demineralized water inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in the attached figure 1-2, the ammonia water preparation device for regenerating the condensed water fine treatment ion exchange resin comprises a liquid ammonia mixer 1, a liquid ammonia tank 2, an ammonia water tank 3, a circulating booster pump 4 and a desalted water tank 5;
the liquid ammonia tank 2 is connected with the liquid ammonia mixer 1 through a first pipeline 101;
the ammonia water tank 3 is connected with the liquid ammonia mixer 1 through a second pipeline 102;
the circulating booster pump 4 is connected with the liquid ammonia mixer 1 through a third pipeline 103, and an ammonia water outlet pipeline 201 is arranged on the third pipeline 103;
the ammonia water tank 3 is connected with the circulating booster pump 4 through a fourth pipeline 104 and a fifth pipeline 105 which are arranged in sequence;
the desalting water tank 5 is connected to the junction of the pipeline four 104 and the pipeline five 105 through a pipeline six 106, and an exhaust pipeline one 301 is arranged between the desalting water tank 5 and the ammonia water tank 3; the desalting water tank 5 is also provided with a second exhaust pipeline 401.
The ammonia water tank 3 is provided with an ammonia water tank liquid level meter 31, a pressure gauge 32 and a safety valve 34.
The desalted water tank 5 is provided with a desalted water inlet pipeline 501 and a desalted water tank liquid level meter 55;
one end of the demineralized water inlet pipeline 501 is communicated to the inside of the demineralized water tank 5 and is connected with the demineralized water inlet nozzle 53, and the other end is a demineralized water inlet 56; the inlet valve 54 of the demineralized water tank is provided on the demineralized water inlet line 501.
The available effective volume of the demineralized water tank 5 is greater than the available effective volume of the ammonia tank.
The first pipeline 101 is provided with a throttling decompression device 21, a liquid ammonia outlet valve 22, a liquid ammonia flow regulating valve 23 and a liquid ammonia flowmeter 24;
a circulation flow regulating valve 11 is arranged on the pipeline III 103;
an ammonia water outlet pipeline 201 is arranged between the circulating flow regulating valve 11 and the circulating booster pump 4, and an ammonia water outlet valve 41 and an ammonia water outlet 42 are arranged on the ammonia water outlet pipeline 201;
an ammonia water tank outlet valve 35 is arranged on the fourth 104 pipeline;
a conductivity meter 36 and an ammonia water flowmeter 37 are arranged on the fifth pipeline 105;
a sixth pipeline 106 is provided with a desalted water tank outlet valve 51;
the first exhaust pipeline 301 is provided with a first exhaust valve 33.
And a second exhaust valve 52 is arranged on the second exhaust pipeline 401.
Example 2
The ammonia water for regenerating the ion exchange resin finely treated by the condensed water prepared by using the device of the embodiment 1 comprises the following steps:
(1) determining the set water level of the ammonia water tank 3 according to the desalted water amount in the ammonia water required by the regeneration of the condensed water fine treatment ion exchange resin;
(2) the demineralized water enters the demineralized water tank 5 through the demineralized water inlet 56 and the demineralized water inlet nozzle 53 by opening the demineralized water tank inlet valve 54 and the second exhaust valve 52.
After the water level of the desalted water tank 5 reaches a set minimum water level (ensuring normal water outlet of the desalted water tank), an outlet valve 51 of the desalted water tank, a circulating flow regulating valve 11 and a first exhaust valve 33 are opened, a circulating booster pump 4 is started, and desalted water enters an ammonia water tank 3 through the outlet valve 51 of the desalted water tank, a conductivity meter 36, an ammonia water flowmeter 37, the circulating booster pump 4, the circulating flow regulating valve 11 and a liquid ammonia mixer 1;
(3) when the water level of the ammonia water tank 3 reaches the set water level, opening the outlet valve 35 of the ammonia water tank, and closing the outlet valve 51 of the desalting water tank; circulating the desalted water among the ammonia water tank 3, the circulating booster pump 4 and the liquid ammonia mixer 1; adjusting a circulation flow adjusting valve 11 to control the circulation flow of the desalted water;
(4) and opening a liquid ammonia outlet valve 22 and a liquid ammonia flow regulating valve 23, enabling the liquid ammonia to pass through a throttling pressure reducing device 21, the liquid ammonia outlet valve 22, the liquid ammonia flow regulating valve 23 and a liquid ammonia flowmeter 24, enter a liquid ammonia mixer 1, mix with circularly flowing desalted water, then enter an ammonia water tank 3, and circularly flow among the ammonia water tank 3, a circulating booster pump 4 and the liquid ammonia mixer 1. Adjusting a liquid ammonia flow adjusting valve 23 to enable the flow of liquid ammonia to be 1-2% of the circulating flow of desalted water (or ammonia water);
in the process of mixing liquid ammonia and demineralized water (or dilute ammonia water), generated tail gas enters the demineralized water tank 5 through the first exhaust pipeline, and ammonia gas in the tail gas is absorbed by the demineralized water sprayed out from the demineralized water inlet nozzle 53;
when the water level of the desalted water tank 5 reaches the highest water level, closing the inlet valve 54 and the second exhaust valve 52 of the desalted water tank;
(5) the conductivity of the ammonia in the formulation is read using conductivity meter 36. When the conductivity of the prepared ammonia water reaches a set conductivity value, the liquid ammonia outlet valve 22 and the liquid ammonia flow regulating valve 23 are closed in sequence, the circulation booster pump 4 stops running after running for 10 minutes, the circulation flow regulating valve 11 and the ammonia water tank outlet valve 35 are closed, and the ammonia water is prepared for standby.
Table 1 shows empirical data for setting the conductivity according to the concentration of the prepared ammonia water, and the set conductivity corresponding to other concentration values can be calculated by interpolation or epitaxy.
TABLE 1
| Concentration of Ammonia (%) | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Conductivity (μ S/cm) | 1231 | 1508 | 1714 | 1946 | 2132 | 2303 | 2462 | 2611 |
Example 3
The regeneration of the condensed water refining ion exchange resin is carried out by using the device 1 of the embodiment 1 and the method of the embodiment 2, and comprises the following steps:
1) preparing ammonia water according to the method of the embodiment 2;
2) opening an outlet valve 51 and an exhaust valve II 52 of the desalting water tank, starting the circulating booster pump 4, opening an ammonia water outlet valve 41, and adjusting the opening degree to make the flow displayed by the ammonia water flowmeter 37 consistent with the set backwashing flow of the condensed water fine treatment ion exchange resin; simultaneously opening the demineralized water tank inlet valve 54, the demineralized water enters the demineralized water tank 5 through the demineralized water inlet 56 and the demineralized water inlet nozzle 53; the opening of the inlet valve 54 of the demineralized water tank is controlled to maintain the water level of the demineralized water tank 5 unchanged or slightly reduced;
the desalted water flows out from the ammonia water outlet 42 along the pipeline six 106, the pipeline five 105, the circulating booster pump 4, the pipeline three 103 and the ammonia water outlet pipeline 201 and is used for backwashing the ion exchange resin;
3) when the backwashing time reaches the time required by the regeneration process of the condensed water fine treatment ion exchange resin, the backwashing process is finished, the outlet valve 35 of the ammonia water tank and the first exhaust valve 33 are opened, the outlet valve 51 of the desalting water tank is closed, the circulating booster pump 4 is started, the outlet valve 41 of the ammonia water is opened, and the opening degree is adjusted, so that the display flow rate of the ammonia water flowmeter 37 is consistent with the regeneration flow rate of the condensed water fine treatment ion exchange resin; ammonia water flows out from the ammonia water outlet 42 along the fourth pipeline 104, the fifth pipeline 106, the circulating booster pump 4, the third pipeline 103 and the ammonia water outlet pipeline 201 and is used for regenerating ion exchange resin;
closing the inlet valve 54 of the demineralized water tank when the water level of the demineralized water tank 5 reaches the maximum water level;
4) after the ammonia water in the ammonia water tank 3 is used, closing the outlet valve 35 and the first exhaust valve 33 of the ammonia water tank, opening the outlet valve 51 of the demineralized water tank, and continuously operating the circulating booster pump 4 according to the flow of the ammonia water to enable the demineralized water to flow out from the ammonia water outlet 42 for replacing the regenerated waste liquid and the residual ammonia water in the ion exchange resin; the duration of the displacement process is 1.0 to 1.5 times the duration of the regeneration process.
5) After the replacement is finished, the ammonia water outlet valve 41 is adjusted to enable the flow of the desalted water to meet the flow required by the forward washing process of the regeneration of the ion exchange resin of the condensate fine treatment device. Simultaneously opening the demineralized water tank inlet valve 54, the demineralized water enters the demineralized water tank 5 through the demineralized water inlet 56 and the demineralized water inlet nozzle 53; the opening of the demineralized water tank inlet valve 54 is controlled to maintain the level of the demineralized water tank 5 substantially constant. And (4) closing the ammonia water outlet valve 41, stopping the circulating booster pump 4, closing the desalting water tank outlet valve 51, the exhaust valve II 52 and the desalting water tank inlet valve 54 after the forward washing process is finished, and finishing the regeneration working period of the condensed water fine treatment ion exchange resin.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An ammonia water preparation device for condensate polishing ion exchange resin regeneration is characterized in that,
comprises a liquid ammonia mixer, a liquid ammonia tank, an ammonia water tank, a circulating booster pump and a desalting water tank;
the liquid ammonia tank is connected with the liquid ammonia mixer through a first pipeline;
the ammonia water tank is connected with the liquid ammonia mixer through a second pipeline;
the circulating booster pump is connected with the liquid ammonia mixer through a third pipeline, and an ammonia water outlet pipeline is arranged on the third pipeline;
the ammonia water tank is connected with the circulating booster pump through a pipeline IV and a pipeline V which are arranged in sequence;
the desalting water tank is connected to the junction of the pipeline four and the pipeline five through a pipeline six, and an exhaust pipeline I is arranged between the desalting water tank and the ammonia water tank; and the desalting water tank is also provided with a second exhaust pipeline.
2. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and the first pipeline is provided with a throttling decompression device, a liquid ammonia outlet valve, a liquid ammonia flow regulating valve and a liquid ammonia flowmeter.
3. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and a circulating flow regulating valve is arranged on the third pipeline.
4. The ammonia water preparation device for regenerating condensed water fine-processing ion exchange resin according to claim 3,
the ammonia water outlet pipeline is arranged between the circulating flow regulating valve and the circulating booster pump, and is provided with an ammonia water outlet valve.
5. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and an outlet valve of the ammonia water tank is arranged on the fourth pipeline.
6. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and a conductivity meter and an ammonia water flowmeter are arranged on the pipeline five.
7. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and an outlet valve of the desalting water tank is arranged on the sixth pipeline.
8. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and a first exhaust valve is arranged on the first exhaust pipeline.
9. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
and the ammonia water tank is provided with a liquid level meter, a pressure gauge and a safety valve.
10. The ammonia water preparing apparatus for regenerating condensed water fine-processing ion exchange resin according to claim 1,
the desalting water tank is provided with a liquid level meter and a desalting water inlet pipeline;
a desalted water inlet valve is arranged on the desalted water inlet pipeline, and one end of the desalted water inlet pipeline communicated to the inside of the desalted water tank is connected with a desalted water inlet nozzle;
and a second exhaust valve is arranged on the second exhaust pipeline.
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