Ammonia preparation system

Abstract

The utility model relates to an ammonia preparation system which comprises a first ammonia preparation tank and a second ammonia preparation tank. Wherein the first ammonia preparation tank is used for being communicated with an ammonia source and a water source, and the ammonia source is used for providing ammonia gas for the first ammonia preparation tank. The water source is used for supplying water to the first ammonia preparation tank so as to prepare first-concentration ammonia water in the first ammonia preparation tank; the second ammonia preparation tank is respectively communicated with an ammonia source and the first ammonia preparation tank, the ammonia source is used for providing ammonia gas for the first ammonia preparation tank, and the first ammonia preparation tank is used for providing first-concentration ammonia water for the second ammonia preparation tank so as to prepare second-concentration ammonia water in the second ammonia preparation tank. When the boiler system is cleaned, the ammonia water with the first concentration can be firstly used for cleaning, and at least part of the ammonia water with the first concentration in the first ammonia preparation tank can be introduced into the second ammonia preparation tank to prepare the ammonia water with the second concentration after encountering stubborn scale, so that the preparation efficiency is higher, and the preparation time is saved.

Description

Technical Field

[0001] The present disclosure relates to the field of ammonia preparation, and in particular, to an ammonia preparation system. Background Art

[0002] Ammonia water plays an important role in the boiler system of a thermal power plant. On the one hand, ammonia water can be used to adjust the pH value of the boiler feed water; on the other hand, ammonia water can be used to clean the boiler system to remove scale and impurities in the boiler system. When using the prepared ammonia water to clean the boiler, it may be found that the scale in some places cannot be removed with the ammonia water of this concentration, and a higher concentration of ammonia water is required. At this time, if ammonia and water are used again for preparation, the preparation efficiency is low. Utility Model Content

[0003] The object of the present disclosure is to provide an ammonia preparation system which has high preparation efficiency when ammonia water with a higher concentration is required for cleaning a boiler.

[0004] In order to achieve the above object, the present disclosure provides an ammonia preparation system, comprising:

[0005] a first ammonia preparation tank, used to be connected to an ammonia source and a water source respectively, the ammonia source is used to provide ammonia gas to the first ammonia preparation tank, and the water source is used to provide water to the first ammonia preparation tank, so as to prepare ammonia water of a first concentration in the first ammonia preparation tank;

[0006] The second ammonia preparation tank is used to be connected to the ammonia source and the first ammonia preparation tank respectively, the ammonia source is used to provide ammonia gas to the second ammonia preparation tank, and the first ammonia preparation tank is used to provide the first concentration ammonia water to the second ammonia preparation tank to prepare the second concentration ammonia water in the second ammonia preparation tank.

[0007] Optionally, the ammonia preparation system further includes an ammonia water pipeline, which is used to connect the first ammonia preparation tank and the second ammonia preparation tank. The ammonia water pipeline is provided with a pump body for transporting the ammonia water of the first concentration in the first ammonia preparation tank to the second ammonia preparation tank.

[0008] Optionally, a first stop valve and a second stop valve are respectively provided on the ammonia water pipeline, the first stop valve is connected between the pump body and the first ammonia preparation tank, and the second stop valve is connected between the pump body and the second ammonia preparation tank.

[0009] Optionally, the ammonia preparation system further includes a first ammonia delivery pipeline and a main water delivery pipeline, the first ammonia preparation tank is used to communicate with the ammonia source through the first ammonia delivery pipeline, and the first ammonia delivery pipeline is provided with a first electric valve for controlling the on-off of the first ammonia delivery pipeline;

[0010] The first ammonia preparation tank is used to communicate with the water source through the main water supply pipeline, and the main water supply pipeline is provided with a second electric valve for controlling the on-off of the main water supply pipeline.

[0011] Optionally, the first ammonia preparation tank is provided with a first conductivity monitor, and the first conductivity monitor, the first electric valve and the second electric valve are respectively communicatively connected to the controller.

[0012] Optionally, the first ammonia transmission pipeline is provided with a first flow meter for monitoring the ammonia transmission flow rate of the first ammonia transmission pipeline.

[0013] Optionally, the ammonia preparation system includes a second ammonia delivery pipeline, the second ammonia preparation tank is used to communicate with the ammonia source through the second ammonia delivery pipeline, and the second ammonia delivery pipeline is provided with a third electric valve for controlling the on-off of the second ammonia delivery pipeline;

[0014] The second ammonia preparation tank is provided with a second conductivity monitor, and the second conductivity monitor, the pump body and the third electric valve are respectively connected to the controller for communication.

[0015] Optionally, the second ammonia transmission pipeline is provided with a second flow meter for monitoring the ammonia transmission flow rate of the second ammonia transmission pipeline.

[0016] Optionally, the first ammonia preparation tank is provided with a first liquid level meter for monitoring the liquid level of ammonia water in the first ammonia preparation tank; and / or

[0017] The second ammonia dispensing tank is provided with a second hydraulic pressure gauge for monitoring the liquid level in the second ammonia dispensing tank.

[0018] Optionally, the ammonia preparation system also includes an ammonia escape prevention box, which is used to contain water that can absorb ammonia. The first ammonia preparation tank is connected to one of the two ammonia escape prevention boxes through a first exhaust pipe, and the second ammonia preparation tank is connected to the other of the two ammonia escape prevention boxes through a second exhaust pipe.

[0019] Through the above technical scheme, the first concentration ammonia water prepared in the first ammonia preparation tank can be used for preliminary cleaning of the boiler. When encountering scale that is difficult to clean during the cleaning process and requires a higher concentration of ammonia water for cleaning, at least part of the first concentration ammonia water in the first ammonia preparation tank can be passed into the second ammonia preparation tank to prepare a higher concentration of second concentration ammonia water, so as to improve the preparation efficiency without affecting the concentration of the first concentration ammonia water in the first ammonia preparation tank. When the second concentration ammonia water in the second ammonia preparation tank is not needed, the first concentration ammonia water can still be used to reduce the waste of ammonia and reduce costs.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] Figure 1 is a schematic diagram of an ammonia preparation system provided in an exemplary embodiment of the present disclosure;

[0023] Figure 2 This is a structural diagram of the ammonia distribution cabinet;

[0024] Figure 3 It is a schematic diagram of the structure of the first ammonia escape prevention box;

[0025] Figure 4 It is a schematic diagram of the structure of the second anti-ammonia escape box.

[0026] Description of Reference Numerals

[0027] 10-first ammonia distribution tank; 11-first liquid level gauge; 20-second ammonia distribution tank; 21-second liquid level gauge; 30-pump body; 40-ammonia escape prevention box; 41-first ammonia escape prevention box; 42-second ammonia escape prevention box; 50-ammonia distribution control cabinet; 51-upper cabinet; 511-display; 52-lower cabinet; 61-first conductivity monitor; 62-second conductivity monitor;

[0028] 1a-main ammonia pipeline; 1b-ammonia connecting pipe; 1c-first ammonia pipeline; 11c-first ammonia branch; 1d-second ammonia pipeline; 11d-second ammonia branch; 2a-main water pipeline; 2c-first water pipeline; 2d-second water pipeline; 3a-first exhaust pipeline; 3b-second exhaust pipeline; 4a-ammonia pipeline; 5a-first exhaust pipeline; 51a-first exhaust branch; 52a-second exhaust branch; 5b-second exhaust pipeline; 51b-third exhaust branch; 52b-fourth exhaust branch;

[0029] 101-first electric valve; 102-first regulating valve; 103-third stop valve; 104-fourth stop valve; 105-fifth stop valve; 106-third flow meter; 107-fourth electric valve; 108-barometer; 109-sixth stop valve; 110-third electric valve; 111-seventh stop valve; 112-second flow meter; 113-eighth stop valve; 114-ninth stop valve; 115-first flow meter; 116-tenth stop valve ; 117-the sixteenth stop valve; 201-the second electric valve; 202-the eleventh stop valve; 203-the twelfth stop valve; 204-the thirteenth stop valve; 205-the fourteenth stop valve; 206-the fifteenth stop valve; 301-the third check valve; 302-the sixth check valve; 401-the first stop valve; 402-the second stop valve; 501-the first check valve; 502-the second check valve; 503-the fourth check valve; 504-the fifth check valve. DETAILED DESCRIPTION

[0030] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0031] In the present disclosure, the direction of the arrow in the figure is the conveying direction of the material in the pipeline. Unless otherwise specified, the directional words used, such as "inside" and "outside", refer to the inside and outside of the outline of the component or structure itself. "First" and "second" are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0032] like Figures 1 to 4 As shown, the present disclosure provides an ammonia preparation system, including a first ammonia preparation tank 10 and a second ammonia preparation tank 20, wherein the first ammonia preparation tank 10 is connected to an ammonia source (not shown in the figure) and a water source (not shown in the figure), respectively, the ammonia source is used to provide ammonia gas to the first ammonia preparation tank 10, and the water source is used to provide water to the first ammonia preparation tank 10, so as to prepare ammonia water of a first concentration in the first ammonia preparation tank 10.

[0033] In addition, the second ammonia preparation tank 20 is used to be connected to the ammonia source and the first ammonia preparation tank 10 respectively, the ammonia source is used to provide ammonia gas to the second ammonia preparation tank 20, and the first ammonia preparation tank 10 is used to provide ammonia water of the first concentration to the second ammonia preparation tank 20, so as to prepare ammonia water of the second concentration in the second ammonia preparation tank 20. The concentration of the second concentration ammonia water is higher than the concentration of the first concentration ammonia water. Compared with re-preparing ammonia water of the second concentration, it is more efficient to pass at least part of the first concentration ammonia water in the first ammonia preparation tank 10 into the second ammonia preparation tank 20 to prepare ammonia water of the second concentration, which saves preparation time and does not affect the concentration of the first concentration ammonia water in the first ammonia preparation tank 10. When the second concentration ammonia water in the second ammonia preparation tank 20 is not needed, the first concentration ammonia water can still be used to reduce the waste of ammonia gas and reduce costs. In addition, the first concentration ammonia water and the second concentration ammonia water can also be used at the same time, so as to be suitable for application scenarios where two different concentrations of ammonia water need to be used at the same time.

[0034] When using ammonia water to clean scale and impurities in the boiler system, the boiler and pipes of the boiler system can be cleaned with ammonia water of the first concentration first. During the cleaning process, if stubborn scale that is difficult to clean with ammonia water of the first concentration is encountered, the ammonia water of the first concentration in the first ammonia preparation tank 10 can be passed into the second ammonia preparation tank 20 to prepare ammonia water of a higher concentration, thereby improving the preparation efficiency of the ammonia water of the second concentration and saving preparation time. The prepared ammonia water of the second concentration is used to clean the stubborn scale.

[0035] It should be noted that the water source may include a desalted water storage tank, and the ammonia source may include an ammonia gas storage tank, which will not be described in detail here.

[0036] In some embodiments, the ammonia preparation system also includes an ammonia water pipeline 4a, which is used to connect the first ammonia preparation tank 10 and the second ammonia preparation tank 20. A pump body 30 is provided on the ammonia water pipeline 4a for transporting the first concentration ammonia water in the first ammonia preparation tank 10 to the second ammonia preparation tank 20.

[0037] In addition, the ammonia water pipeline 4a is respectively provided with a first stop valve 401 and a second stop valve 402, wherein the first stop valve 401 is connected between the pump body 30 and the first ammonia preparation tank 10, and the second stop valve 402 is connected between the pump body 30 and the second ammonia preparation tank 20. During the preparation of the ammonia water in the first ammonia preparation tank 10, the first stop valve 401 can be closed to prevent leakage of materials (such as ammonia water and ammonia gas) in the first ammonia preparation tank 10. When it is necessary to pass the ammonia water in the first ammonia preparation tank 10 into the second ammonia preparation tank 20, the first stop valve 401 and the second stop valve 402 can be opened, and then the pump body 30 is started to pass the ammonia water of the first concentration in the first ammonia preparation tank 10 into the second ammonia preparation tank 20. During the preparation of the ammonia water of the second concentration in the second ammonia preparation tank 20, the second stop valve 402 can be closed to prevent leakage of materials (such as ammonia gas) in the second ammonia preparation tank 20.

[0038] In some embodiments, the ammonia preparation system further includes a first ammonia delivery pipeline 1c and a main water delivery pipeline 2a, and the first ammonia preparation tank 10 is used to communicate with the ammonia source through the first ammonia delivery pipeline 1c, and the first ammonia delivery pipeline 1c is provided with a first electric valve 101 for controlling the on-off of the first ammonia delivery pipeline 1c. It should be noted that a pump can be used as a power source to transport ammonia gas in the ammonia source through the first ammonia delivery pipeline 1c to the first ammonia preparation tank 10, which will not be repeated here.

[0039] In addition, the first ammonia preparation tank 10 is used to communicate with the water source through the main water supply pipeline 2a, and the main water supply pipeline 2a is provided with a second electric valve 201 for controlling the on and off of the main water supply pipeline 2a. It should be noted that the desalted water in the water source can be transported to the second ammonia preparation tank 20 through the main water supply pipeline 2a by a pump as a power source.

[0040] In some embodiments, a first flow meter 115 is provided on the first ammonia delivery pipeline 1c to monitor the ammonia delivery flow rate in the first ammonia delivery pipeline 1c.

[0041] In some embodiments, the first ammonia preparation tank 10 is provided with a first conductivity monitor 61 , and the first conductivity monitor 61 , the first electric valve 101 , and the second electric valve 201 are respectively connected to the controller for communication.

[0042] In addition, a first liquid level meter 11 for monitoring the liquid level of ammonia water in the first ammonia preparation tank 10 may also be provided on the first ammonia preparation tank 10 .

[0043] In the above embodiment, the first conductivity monitor 61 can be used to measure the conductivity of the ammonia water in the first ammonia tank 10, so that the concentration of the ammonia water can be converted according to the conductivity. Among them, obtaining the concentration of the ammonia water from the conductivity is a known conventional method. For example, the conversion formula between the conductivity and the ammonia water concentration is c=(13.2S 2 +62.7S)*10 -7 (%), where c is the concentration of ammonia water and S is the conductivity of ammonia water. The controller can convert the conductivity of ammonia water in the first ammonia preparation tank 10 into the concentration of ammonia water in the first ammonia preparation tank 10 according to the conversion formula of conductivity and ammonia water concentration.

[0044] When preparing ammonia water in the first ammonia preparation tank 10, the second electric valve 201 can be controlled to open by the controller (not shown in the figure), and desalted water is introduced into the first ammonia preparation tank 10. The liquid level of the desalted water in the first ammonia preparation tank 10 is observed by the first liquid level meter 11. When the liquid level of the desalted water in the first ammonia preparation tank 10 reaches the preset liquid level value, the second electric valve 201 can be controlled to close by the controller. Then, the first electric valve 101 is controlled to open by the controller to introduce ammonia gas into the first ammonia preparation tank 10, and the conductivity of the ammonia water in the first ammonia preparation tank 10 is monitored by the first conductivity monitor 61 to obtain the concentration of the ammonia water in the first ammonia preparation tank 10. After the concentration of the ammonia water in the first ammonia preparation tank 10 reaches the preset concentration, the first electric valve 101 can be controlled to close by the controller.

[0045] In addition, the controller can also selectively control the opening and closing of the first electric valve 101 and the second electric valve 201 according to the concentration of the prepared ammonia water in the first ammonia preparation tank 10. For example, when the concentration of the ammonia water in the first ammonia preparation tank 10 is less than the preset concentration, the controller can control the first electric valve 101 to open and input ammonia gas into the first ammonia preparation tank 10; when the concentration of the ammonia water in the first ammonia preparation tank 10 is higher than the preset concentration, the controller can control the second electric valve 201 to open and input desalted water into the first ammonia preparation tank 10.

[0046] In some embodiments, the ammonia preparation system further includes a second ammonia delivery pipeline 1d, and the second ammonia preparation tank 20 is used to communicate with the ammonia source through the second ammonia delivery pipeline 1d, and the second ammonia delivery pipeline 1d is provided with a third electric valve 110 for controlling the on-off of the second ammonia delivery pipeline 1d. It should be noted that a pump can be used as a power source to transport ammonia gas in the ammonia source to the second ammonia preparation tank 20 through the second ammonia delivery pipeline 1d, which will not be described in detail here.

[0047] In some embodiments, a second flow meter 112 is provided on the second ammonia delivery pipeline 1d, and the second flow meter 112 is used to monitor the ammonia delivery flow rate of the second ammonia delivery pipeline 1d.

[0048] In addition, the second ammonia tank 20 is provided with a second conductivity monitor 62, and the second conductivity monitor 62, the pump body 30 and the third electric valve 110 are respectively connected to the controller for communication. The second ammonia tank 20 is provided with a second liquid level meter 21 for monitoring the liquid level in the second ammonia tank 20.

[0049] When it is necessary to use the second ammonia preparation tank 20 to prepare ammonia water, the first stop valve 401 and the second stop valve 402 can be opened first, and the controller controls the pump body 30 to start, and the first concentration ammonia water prepared in the first ammonia preparation tank 10 is transported to the second ammonia preparation tank 20 through the pump body 30. The liquid level of the ammonia water introduced into the second ammonia preparation tank 20 is monitored by the second liquid level meter 21. When the preset liquid level is reached, the pump body 30 can be controlled to be closed by the controller, and then the first stop valve 401 and the second stop valve 402 are closed. Then, the third electric valve 110 is controlled to start by the controller to transport ammonia gas to the second ammonia preparation tank 20 through the second ammonia delivery pipeline 1d. The second conductivity monitor 62 monitors the conductivity of the ammonia water in the second ammonia preparation tank 20 and feeds it back to the controller. The controller converts the concentration of the ammonia water in the second ammonia preparation tank 20 according to the conductivity of the ammonia water in the second ammonia preparation tank 20 fed back by the second conductivity monitor 62. When the concentration of the ammonia water in the second ammonia preparation tank 20 reaches a preset concentration, the controller controls the third electric valve 110 to close.

[0050] The controller may be, for example, a PLC controller or a single-chip microcomputer, but the present disclosure is not limited thereto.

[0051] like Figures 1 to 4 As shown in, in some embodiments, the ammonia preparation system also includes an anti-ammonia escape box 40, which is used to contain water that can absorb ammonia. The first ammonia preparation tank 10 is connected to one of the two anti-ammonia escape boxes 40 through a first exhaust pipe 5a, and the second ammonia preparation tank 20 is connected to the other of the two anti-ammonia escape boxes 40 through a second exhaust pipe 5b.

[0052] In the above-mentioned embodiment, the two ammonia escape prevention boxes 40 may be respectively the first ammonia escape prevention box 41 and the second ammonia escape prevention box 42, wherein the first ammonia escape prevention box 41 is connected to the first ammonia preparation tank 10 through the first exhaust pipeline 5a, one end of the first exhaust pipeline 5a is connected to the first ammonia preparation tank 10, and the other end of the first exhaust pipeline 5a is connected to the first exhaust branch pipe 51a and the second exhaust branch pipe 52a. The first exhaust branch pipe 51a is connected to the first ammonia escape prevention box 41, and the second exhaust branch pipe 52a is connected to the external environment. A first check valve 501 is provided on the first exhaust branch pipe 51a to allow the gas discharged from the first ammonia preparation tank 10 through the first exhaust pipeline 5a to pass into the first ammonia escape prevention box 41 through the first exhaust branch, and to prevent the water in the first ammonia escape prevention box 41 from flowing back. A second check valve 502 is provided on the second exhaust branch pipe 52a to prevent the gas in the first ammonia preparation tank 10 from being discharged into the external environment through the second exhaust branch pipe 52a, and to allow the gas in the external environment to enter the first ammonia preparation tank 10 through the second exhaust branch pipe 52a.

[0053] In addition, when the first ammonia preparation tank 10 is arranged in the factory building, the first ammonia escape prevention box 41 can be connected to the outside of the factory building outside the partition wall through the first exhaust pipeline 3a, so as to discharge the gas purified by the ammonia escape prevention box 40 to the outside of the factory building. Among them, the first exhaust pipeline 3a is provided with a third check valve 301, which is used to prevent the external wind from flowing back into the first ammonia escape prevention box 41 through the first exhaust pipeline 3a.

[0054] The working principle of the first ammonia escape prevention tank 41 is briefly described below. The first ammonia preparation tank 10 is connected to the first ammonia escape prevention tank 41 through the first exhaust pipeline 5a and the first exhaust branch pipe 51a, wherein the first exhaust branch pipe 51a is passed below the liquid level of the water in the first ammonia escape prevention tank 41. After the gas discharged from the first ammonia preparation tank 10 is purified by the water in the first ammonia escape prevention tank 41, the water in the first ammonia escape prevention tank 41 absorbs the ammonia contained in the gas discharged from the first ammonia preparation tank 10, and then the purified gas is discharged outside the factory through the first exhaust pipeline 3a. When the preparation of ammonia water in the first ammonia preparation tank 10 is stopped and the liquid level in the first ammonia preparation tank 10 gradually decreases while the ammonia water is continuously used, the air pressure in the space in the first ammonia preparation tank 10 gradually decreases. When the air pressure in the first ammonia preparation tank 10 drops to a preset value, gas can be absorbed from the external environment into the first ammonia preparation tank 10 through the second exhaust branch pipe 52a connected to the first exhaust pipeline 5a to maintain the air pressure in the first ammonia preparation tank 10.

[0055] In addition, the second ammonia distribution tank 20 is connected to the second ammonia escape prevention tank 42 through the second exhaust pipeline 5b. Among them, one end of the second exhaust pipeline 5b is connected to the second ammonia distribution pipe, and the other end of the second exhaust pipeline 5b is respectively connected to the third exhaust branch pipe 51b and the fourth exhaust branch pipe 52b. One end of the third exhaust branch pipe 51b is connected to the second ammonia escape prevention tank 42, and the third exhaust branch pipe 51b is passed below the liquid level of water in the second ammonia escape prevention tank 42. In addition, one end of the fourth exhaust branch pipe 52b is connected to the second exhaust pipeline 5b, and the other end of the fourth exhaust branch pipe 52b is connected to the external environment. The third exhaust branch pipe 51b is provided with a fourth check valve 503, which is used to allow the gas in the second ammonia distribution tank 20 to pass through the second exhaust pipeline 5b and the third exhaust branch pipe 51b to pass into the second ammonia escape prevention tank 42, and prevent the water in the second ammonia escape prevention tank 42 from flowing back. A fifth check valve 504 is provided on the fourth exhaust branch pipe 52b, which is used to prevent the gas in the second ammonia preparation tank 20 from passing through the second exhaust pipeline 5b and the fourth exhaust branch pipe 52b to the external environment, and allows the gas in the external environment to be sucked into the second ammonia preparation tank 20 through the fourth exhaust branch pipe 52b. In addition, when the second ammonia preparation tank 20 is set in the factory building, the second ammonia escape prevention box 42 can be connected to the outside of the factory building outside the partition wall through the second exhaust pipeline 3b, and the gas purified by the second ammonia escape prevention box 42 is discharged to the outside of the factory building through the second exhaust pipeline 3b. Among them, a sixth check valve 302 is provided on the second exhaust pipeline 3b to prevent the external wind from flowing back into the second ammonia escape prevention box 42 through the second exhaust pipeline 3b.

[0056] The working principle of the second ammonia escape prevention tank 42 is briefly described below. The second ammonia preparation tank 20 is connected to the second ammonia escape prevention tank 42 through the second exhaust pipeline 5b and the third exhaust branch pipe 51b, wherein the third exhaust branch pipe 51b is passed below the liquid level of the water in the second ammonia escape prevention tank 42. After the gas discharged from the second ammonia preparation tank 20 is purified by the water in the second ammonia escape prevention tank 42, the water in the second ammonia escape prevention tank 42 absorbs the ammonia contained in the gas discharged from the second ammonia preparation tank 20, and then the purified gas is discharged outside the factory through the second exhaust pipeline 3b. When the preparation of ammonia water is stopped in the second ammonia preparation tank 20 and the liquid level in the second ammonia preparation tank 20 gradually decreases while the ammonia water is continuously used, the air pressure in the space in the second ammonia preparation tank 20 gradually decreases. When the air pressure in the second ammonia preparation tank 20 drops to a preset value, gas can be absorbed from the external environment into the second ammonia preparation tank 20 through the fourth exhaust branch pipe 52b connected to the second exhaust pipeline 5b to maintain the air pressure in the second ammonia preparation tank 20.

[0057] The overall structure of the ammonia preparation system is briefly described below. Figures 1 to 4As shown, the ammonia distribution system also includes an ammonia main line 1a and an ammonia connecting pipe 1b. One end of the ammonia main line 1a is connected to an ammonia source (ammonia storage tank), and the other end of the ammonia main line 1a is reserved with an interface for transporting ammonia to other ammonia-using equipment. The ammonia main line 1a is provided with a sixteenth stop valve 117, a first regulating valve 102, and a third stop valve 103 in sequence along the ammonia delivery direction (the arrow direction shown in the figure is the flow direction of ammonia in the ammonia main line 1a). Among them, the sixteenth stop valve 117 is used to control the connection between the ammonia main line 1a and the ammonia source. When the sixteenth stop valve 117 is opened, the ammonia gas in the ammonia source can be introduced into the ammonia main line 1a. The third stop valve 103 is used to control the connection between the interface at one end of the ammonia main line 1a away from the ammonia source and the ammonia source, so that the third stop valve 103 can be opened when the interface at one end of the ammonia main line 1a away from the ammonia source needs to be used; the third stop valve 103 can be closed when the interface at one end of the ammonia main line 1a away from the ammonia source does not need to be used. The first regulating valve 102 is used to control the flow of ammonia gas through the ammonia main line 1a.

[0058] In addition, one end of the ammonia transmission connecting pipe 1b is connected to the ammonia transmission main line 1a, and its connection position is between the first regulating valve 102 and the third stop valve 103. The other end of the ammonia transmission connecting pipe 1b is respectively connected to the first ammonia transmission pipeline 1c and the second ammonia transmission pipeline 1d. The ammonia source, the ammonia transmission main line 1a and part of the ammonia transmission connecting pipe 1b are located outside the factory building to prevent the ammonia source from being set in the factory building. The other part of the ammonia transmission connecting pipe 1b is located in the factory building through the partition wall. A fourth stop valve 104 is provided on the part of the ammonia transmission connecting pipe 1b located outside the factory building, and the opening and closing of the fourth stop valve 104 is controlled to control whether the ammonia in the ammonia transmission main line 1a is passed into the ammonia transmission connecting pipe 1b. A fifth stop valve 105 is provided on the part of the ammonia transmission connecting pipe 1b located in the factory building, and the opening and closing of the fifth stop valve 105 is controlled to control whether the ammonia is passed into the factory building. Ammonia gas in the ammonia transport connecting pipe 1b flows from one end connected to the main ammonia transport pipeline 1a to one end connected to the first ammonia transport pipeline 1c and the second ammonia transport pipeline 1d.

[0059] A third flowmeter 106, a fourth electric valve 107 and a barometer 108 are sequentially arranged on the ammonia delivery connecting pipe 1b, downstream of the fifth stop valve 105 along the flow direction of ammonia. A sixth stop valve 109 is connected in parallel to the pipeline of the ammonia delivery connecting pipe 1b between the barometer 108 and the fourth electric valve 107. Among them, the third flowmeter 106 is used to monitor the flow of ammonia in the ammonia delivery connecting pipe 1b, the fourth electric valve 107 is used to adjust the flow of ammonia in the ammonia delivery connecting pipe, the barometer 108 is used to monitor the air pressure in the ammonia delivery connecting pipe 1b, and the sixth stop valve 109 connected in parallel is used to relieve the pressure of the ammonia delivery pipeline. For example, when the barometer 108 detects that the air pressure of ammonia in the ammonia delivery pipeline is too high, the sixth stop valve 109 can be opened to release the ammonia in the ammonia delivery connecting pipe 1b. One end of the pipeline where the sixth stop valve 109 is located is connected to the ammonia delivery connecting pipe 1b, and the other end can be connected to a separately provided ammonia storage tank to store the leaked ammonia in the ammonia storage tank.

[0060] One end of the first ammonia delivery pipeline 1c is connected to the ammonia delivery connecting pipe 1b, and the other end of the first ammonia delivery pipeline 1c is connected to the first ammonia preparation tank 10. The first electric valve 101 and the tenth stop valve 116 are sequentially arranged on the first ammonia delivery pipeline 1c along the flow direction of ammonia. Among them, the tenth stop valve 116 is connected in parallel with the first ammonia delivery branch 11c, and the first ammonia delivery branch 11c is provided with a ninth stop valve 114 and a first flowmeter 115. When ammonia is delivered to the first ammonia preparation tank 10, the tenth stop valve 116 is closed, and the ammonia in the first ammonia delivery pipeline 1c passes through the first ammonia delivery branch 11c and then is delivered to the first ammonia preparation tank 10 by the first ammonia delivery pipeline 1c. The first flowmeter 115 is used to monitor the flow of ammonia passing through the first ammonia delivery branch 11c. When the first ammonia delivery branch 11c is blocked and cannot operate normally, the ninth stop valve 114 can be closed and the tenth stop valve 116 can be opened to ensure that ammonia can be delivered to the first ammonia preparation tank 10 normally.

[0061] In addition, one end of the second ammonia delivery pipeline 1d is connected to the ammonia delivery connecting pipe 1b, and the other end of the first ammonia delivery pipeline 1c is connected to the second ammonia preparation tank 20. The second ammonia delivery pipeline 1d is provided with a third electric valve 110 and an eighth stop valve 113 in sequence along the flow direction of ammonia, wherein the eighth stop valve 113 is connected in parallel with the second ammonia delivery branch 11d, and the second ammonia delivery branch 11d is provided with a seventh stop valve 111 and a second flow meter 112. When ammonia is delivered to the second ammonia preparation tank 20, the eighth stop valve 113 is closed, and the ammonia in the second ammonia delivery pipeline 1d passes through the second ammonia delivery branch 11d and is then delivered to the second ammonia preparation tank 20 by the second ammonia delivery pipeline 1d. The second flow meter 112 is used to monitor the flow of ammonia passing through the second ammonia delivery branch 11d. When the second ammonia delivery branch 11d is blocked and cannot be operated, the eighth stop valve 113 can be closed, and the tenth stop valve 116 can be opened to ensure that ammonia can be delivered to the second ammonia preparation tank 20 normally.

[0062] One end of the main water supply pipeline 2a in the ammonia distribution system is connected to a water source (e.g., a desalted water storage tank), and the other end is connected to the first ammonia distribution tank 10. A pump can be used as a power source to transport the desalted water to the first ammonia distribution tank 10 through the main water supply pipeline 2a. The main water supply pipeline 2a is provided with an eleventh stop valve 202, a twelfth stop valve 203, a second electric valve 201, and a thirteenth stop valve 204 in sequence along the flow direction of the desalted water. Among them, the second electric valve 201 can be controlled by a controller to control the on and off of the main water supply pipeline 2a. The main water supply pipeline 2a between the second electric valve 201 and the thirteenth stop valve 204 is connected to the first water supply pipeline 2c, one end of the first water supply pipeline 2c is connected to the main water supply pipeline 2a, and the other end of the first water supply pipeline 2c is connected to the first ammonia escape prevention tank 41, so as to transport the desalted water to the first ammonia escape prevention tank 41 through the first water supply pipeline 2c. A fourteenth stop valve 205 is provided on the first water supply pipeline 2c for controlling the on-off of the first water supply pipeline 2c, a second water supply pipeline 2d is connected to the pipeline between the fourteenth stop valve 205 and the main water supply pipeline 2a on the first water supply pipeline 2c, one end of the second water supply pipeline 2d is connected to the first water supply pipeline 2c, and the other end of the second water supply pipeline 2d is connected to the second ammonia escape prevention tank 42 to transport desalted water to the second ammonia escape prevention tank 42, and a fifteenth stop valve 206 is provided on the second water supply pipeline 2d for controlling the on-off of the second water supply pipeline 2d.

[0063] In addition, the ammonia water pipeline 4a connected to the first ammonia distribution box, the first ammonia escape prevention box 41 and the second ammonia escape prevention box 42 have been described above and will not be repeated here.

[0064] The ammonia preparation system also includes an ammonia preparation control cabinet 50, which includes an upper cabinet 51 and a lower cabinet 52. A controller and a display 511 connected to the controller are arranged in the upper cabinet 51 of the ammonia preparation control cabinet 50. The display 511 can be used to display the concentration of ammonia water in the first ammonia preparation tank 10 and the second ammonia preparation tank 20, respectively. The second electric valve 201 and the twelfth stop valve 203 on the main water supply pipeline 2a are arranged in the lower cabinet 52 of the ammonia preparation control cabinet 50. The first electric valve 101, the tenth stop valve 116 on the first ammonia delivery pipeline 1c, and the ninth stop valve 114 and the first flowmeter 115 on the first ammonia delivery branch 11c are all arranged in the lower cabinet 52 of the ammonia preparation control cabinet 50. The third electric valve 110, the eighth stop valve 113 on the second ammonia delivery pipeline 1d, and the seventh stop valve 111 and the second flowmeter 112 on the second ammonia delivery branch 11d are all arranged in the lower cabinet 52 of the ammonia preparation control cabinet 50. Some valves in the ammonia preparation system are concentrated in the ammonia preparation control cabinet 50, so as to facilitate centralized processing of the valves in the ammonia preparation system.

[0065] The following is a brief description of the ammonia preparation process of the ammonia preparation system. When ammonia needs to be prepared in the first ammonia preparation tank 10, the second electric valve 201 is controlled by the controller to open, and the desalted water is transported to the first ammonia preparation tank 10 through the main water delivery pipeline. The liquid level of the desalted water in the first ammonia preparation tank 10 is measured by the first liquid level meter 11. When the liquid level of the desalted water in the first ammonia preparation tank 10 reaches the preset liquid level, the second electric valve 201 is controlled by the controller to close, and the water supply to the first ammonia preparation tank 10 is stopped. Then, the first electric valve 101 is controlled by the controller to open, and ammonia gas is transported to the first preparation tank through the ammonia delivery main pipeline, the ammonia delivery connecting pipe 1b and the first ammonia delivery pipeline to prepare ammonia water in the first ammonia preparation tank 10. When the first conductivity monitor 61 set in the first ammonia preparation tank 10 monitors that the conductivity of the ammonia water in the first ammonia preparation tank 10 is the preset conductivity, the first conductivity monitor 61 feeds back the data to the controller, and the controller controls the second electric valve 201 to close, and the ammonia supply to the first ammonia preparation tank 10 is stopped. The controller can convert the data fed back by the first conductivity monitor 61 into the concentration of ammonia water and display it on the display 511. Therefore, the controller can also control the closing of the second electric valve 201 according to the concentration of ammonia water. For example, when the concentration of ammonia water in the first ammonia tank 10 reaches a preset concentration, the second electric valve 201 is controlled to close by the controller.

[0066] When it is necessary to prepare ammonia water in the second ammonia preparation tank 20, first open the first stop valve 401 and the second stop valve 402, and control the pump body 30 on the ammonia water pipeline 4a to open through the controller, so as to transport the ammonia water prepared in the first ammonia preparation tank 10 to the second ammonia preparation tank 20, and monitor the liquid level of the ammonia water in the second ammonia preparation tank 20 through the second liquid level meter 21. When the liquid level of the ammonia water in the second ammonia preparation tank 20 reaches the preset liquid level, control the pump body 30 to close through the controller, and then close the first stop valve 401 and the second stop valve 402. Then, the controller controls the third electric valve 110 to open, and ammonia is introduced into the second ammonia distribution tank 20 through the main ammonia delivery line 1a, the ammonia delivery connecting pipe 1b and the second ammonia delivery line 1d. When the conductivity of the ammonia water in the second ammonia distribution tank 20 is monitored to be the preset conductivity by the second conductivity monitor 62 arranged in the second ammonia distribution tank 20, the second conductivity monitor 62 feeds back the data to the controller, and the controller controls the third electric valve 110 to close, and stops supplying ammonia to the second ammonia distribution tank 20. The controller can convert the data fed back by the second conductivity monitor 62 into the concentration of ammonia water and display it on the display 511. Therefore, the controller can also control the closing of the third electric valve 110 according to the concentration of ammonia water. For example, when the concentration of ammonia water in the second ammonia distribution tank 20 reaches the preset concentration, the controller controls the third electric valve 110 to close.

[0067] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, the technical solution of the present disclosure can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present disclosure. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0068] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An ammonia preparation system, characterized in that: include: a first ammonia preparation tank, used to be connected to an ammonia source and a water source respectively, the ammonia source is used to provide ammonia gas to the first ammonia preparation tank, and the water source is used to provide water to the first ammonia preparation tank, so as to prepare ammonia water of a first concentration in the first ammonia preparation tank; The second ammonia preparation tank is used to be connected to the ammonia source and the first ammonia preparation tank respectively, the ammonia source is used to provide ammonia gas to the second ammonia preparation tank, and the first ammonia preparation tank is used to provide the first concentration ammonia water to the second ammonia preparation tank to prepare the second concentration ammonia water in the second ammonia preparation tank.

2. The ammonia preparation system according to claim 1, characterized in that: The ammonia preparation system also includes an ammonia water pipeline, which is used to connect the first ammonia preparation tank and the second ammonia preparation tank. A pump body is provided on the ammonia water pipeline for transporting the first concentration ammonia water in the first ammonia preparation tank to the second ammonia preparation tank.

3. The ammonia preparation system according to claim 2, characterized in that: The ammonia water pipeline is provided with a first stop valve and a second stop valve, respectively. The first stop valve is connected between the pump body and the first ammonia preparation tank, and the second stop valve is connected between the pump body and the second ammonia preparation tank.

4. The ammonia preparation system according to claim 1, characterized in that: The ammonia preparation system further includes a first ammonia delivery pipeline and a main water delivery pipeline, the first ammonia preparation tank is used to communicate with the ammonia source through the first ammonia delivery pipeline, and the first ammonia delivery pipeline is provided with a first electric valve for controlling the on-off of the first ammonia delivery pipeline; The first ammonia preparation tank is used to communicate with the water source through the main water supply pipeline, and the main water supply pipeline is provided with a second electric valve for controlling the on-off of the main water supply pipeline.

5. The ammonia preparation system according to claim 4, characterized in that: The first ammonia preparation tank is provided with a first conductivity monitor, and the first conductivity monitor, the first electric valve and the second electric valve are respectively connected to the controller for communication.

6. The ammonia preparation system according to claim 4, characterized in that: The first ammonia delivery pipeline is provided with a first flow meter for monitoring the ammonia delivery flow rate of the first ammonia delivery pipeline.

7. The ammonia preparation system according to claim 2, characterized in that: The ammonia preparation system comprises a second ammonia delivery pipeline, the second ammonia preparation tank is used to communicate with the ammonia source through the second ammonia delivery pipeline, and the second ammonia delivery pipeline is provided with a third electric valve for controlling the on-off of the second ammonia delivery pipeline; The second ammonia preparation tank is provided with a second conductivity monitor, and the second conductivity monitor, the pump body and the third electric valve are respectively connected to the controller for communication.

8. The ammonia preparation system according to claim 7, characterized in that: The second ammonia delivery pipeline is provided with a second flow meter for monitoring the ammonia delivery flow rate of the second ammonia delivery pipeline.

9. The ammonia preparation system according to claim 1, characterized in that: The first ammonia preparation tank is provided with a first liquid level meter for monitoring the liquid level of ammonia water in the first ammonia preparation tank; and / or The second ammonia dispensing tank is provided with a second hydraulic pressure gauge for monitoring the liquid level in the second ammonia dispensing tank.

10. The ammonia preparation system according to claim 1, characterized in that: The ammonia preparation system also includes an ammonia escape prevention box, which is used to contain water that can absorb ammonia. The first ammonia preparation tank is connected to one of the two ammonia escape prevention boxes through a first exhaust pipe, and the second ammonia preparation tank is connected to the other of the two ammonia escape prevention boxes through a second exhaust pipe.

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