Efficient ammonia water dilution equipment and control system thereof
By adding multiple mixing chambers and circulating ammonia water system to the ammonia water dilution equipment, combined with an automated control system, the safety and concentration uniformity problems of existing equipment are solved, and efficient ammonia water dilution and concentration preparation are achieved.
Patent Information
- Application Number
- CN202421150351.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The existing ammonia water dilution equipment cannot achieve automated control, which leads to safety accidents easily caused by human errors. Only one dilution mixing is used, resulting in poor absorption effect, uneven concentration, and narrow dilution range, which cannot cover low, medium and high The amount of ammonia water required for dilution.
A highly efficient ammonia water dilution equipment is designed, including a primary mixing chamber, a secondary mixing chamber and multiple heat exchange devices. Through the use of multiple mixing and circulating ammonia water, the ammonia water is fully diluted and uniform in concentration, and a control system is equipped with Implement automated control.
It achieves full dilution and mixing of ammonia water, adapts to different concentration requirements, improves safety and concentration accuracy, extends the service life of the equipment, and reduces the risk of human operation errors.
Smart Images
Figure CN222342527U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia water dilution, in particular to a high-efficiency ammonia water dilution device and a control system thereof. Background Art
[0002] Ammonia water is an indispensable raw material in current chemical production. For example, desulfurization and denitrification require the consumption of a large amount of ammonia water. Currently, the important means of preparing ammonia water is to obtain it through dilution with liquid ammonia.
[0003] The explosion limit of ammonia is 15% to 28%. The corresponding liquid ammonia is a flammable and explosive hazardous chemical. Its dilution process is relatively complicated, and the preparation process of ammonia solution will generate a lot of heat and is prone to flash explosion. Therefore, high safety requirements are placed on ammonia dilution equipment.
[0004] The existing ammonia dilution equipment is complex in structure and too numerous to be automatically controlled, which makes it easy for safety accidents to occur due to human errors. In addition, the existing ammonia dilution equipment only uses one-time dilution and mixing, resulting in poor absorption effect and uneven concentration. It also leads to a narrow dilution range, and one set of equipment cannot cover the amount of ammonia required for various low, medium and high dilutions.
[0005] Therefore, a kind of high-efficiency ammonia dilution equipment and its control system came into being. Utility Model Content
[0006] The utility model provides a high-efficiency ammonia dilution device and a control system thereof, which mainly solves the problem that the existing ammonia dilution equipment cannot realize automatic control, which makes it easy to cause safety accidents due to human errors, and that it only uses one dilution and mixing, resulting in poor absorption effect and uneven concentration. In addition, it will lead to a narrow dilution range and a set of equipment cannot cover the problem of the amount of ammonia required for various low, medium and high dilutions.
[0007] The utility model proposes a high-efficiency ammonia water dilution device, comprising a primary mixing chamber, wherein a pure water inlet and a liquid ammonia inlet are provided at the top of the primary mixing chamber, and a discharge hole for ammonia water to pass through is provided on the side wall of the primary mixing chamber;
[0008] a secondary mixing chamber, wherein the secondary mixing chamber completely surrounds the discharge hole of the side wall of the primary mixing chamber;
[0009] A first heat exchange device, wherein the first heat exchange device is arranged to completely cover the outer side wall of the secondary mixing chamber;
[0010] The second heat exchange device is arranged at the liquid outlet of the secondary mixing chamber;
[0011] The pure water and liquid ammonia in the primary mixing chamber are mixed and cooled through disturbance to form ammonia water.
[0012] Preferably, the secondary mixing chamber comprises:
[0013] A secondary mixing chamber, wherein the secondary mixing chamber completely surrounds the discharge hole of the side wall of the primary mixing chamber;
[0014] Tertiary mixing chamber;
[0015] The primary mixing chamber, the secondary mixing chamber and the tertiary mixing chamber are arranged in sequence from top to bottom; and the heat exchange device is arranged to wrap the secondary mixing chamber and the tertiary mixing chamber.
[0016] Preferably, the secondary mixing chamber comprises:
[0017] A first discharge tube; a protrusion of the first discharge tube is formed at the bottom of the secondary mixing chamber; the first discharge tube is connected to the tertiary mixing chamber;
[0018] Liquid sealing groove; the liquid sealing groove is arranged on the outer side of the first discharge cylinder;
[0019] The cover shell is disposed in the liquid seal groove, and the inner diameter of the cover shell is larger than the outer diameter of the first discharge cylinder;
[0020] When the ammonia water fills the liquid sealing groove, the cover shell floats up and liquid seals the first discharge cylinder.
[0021] Preferably, the secondary mixing chamber further comprises,
[0022] A fourth mixing chamber, wherein the fourth mixing chamber protrudes from the bottom of the third mixing chamber; a discharge hole communicating with the third mixing chamber is provided on a side wall of the fourth mixing chamber;
[0023] The central protrusion of the fourth mixing chamber is formed with a second discharge tube, and the height of the second discharge tube is higher than the highest height of the discharge hole;
[0024] When the ammonia water fills the fourth mixing chamber, the second discharge cylinder is liquid-sealed.
[0025] Preferably, the primary mixing chamber is further provided with:
[0026] A circulating ammonia water inlet, wherein the circulating ammonia water inlet is arranged side by side with the pure water inlet and the liquid ammonia inlet;
[0027] The circulating ammonia water inlet is connected to the liquid outlet of the second heat exchange device.
[0028] Preferably, it also includes:
[0029] A buffer tank, wherein the liquid inlet of the buffer tank is connected to the liquid outlet of the second heat exchange device; the liquid outlet of the buffer tank is respectively connected to the ammonia water storage tank and the circulating ammonia water inlet.
[0030] Preferably, the second heat exchange device is a shell and tube heat exchanger; the tube side of the shell and tube heat exchanger is connected to the liquid outlet of the secondary mixing chamber, and the shell side is connected to cooling water.
[0031] Preferably, it also includes control valves for controlling the flow rates of pure water, liquid ammonia, cooling water and circulating ammonia water respectively.
[0032] The utility model also proposes a control system for a high-efficiency ammonia water dilution device, comprising a controller and electronic control valves electrically connected to the controller respectively;
[0033] The controller is used to calculate the required pure water flow and liquid ammonia flow according to the received ammonia water concentration and ammonia water amount to be configured; and is also used to gradually control the corresponding opening of the electronic control valve according to the required pure water flow and liquid ammonia flow.
[0034] As can be seen from the above, the application of the technical solution provided by the utility model can achieve the following beneficial effects:
[0035] First, the ammonia water dilution mixer proposed by the utility model is provided with at least two mixing steps, so that the ammonia water is fully diluted and mixed evenly, and the required concentration can be adjusted to meet the needs of different users for ammonia water of different concentrations;
[0036] Secondly, the ammonia water dilution mixer proposed by the utility model is provided with double liquid seals, which effectively prevents air from leaking in, ensures that the ammonia water dilution mixer is in a closed environment, and improves the safety of the ammonia water preparation process;
[0037] Thirdly, the ammonia water dilution mixer proposed by the utility model is provided with circulating ammonia water, which timely transfers the heat released by liquid ammonia during the dilution process, and ensures that the ammonia water is fully and evenly diluted through the disturbance of large flow ammonia water, thereby ensuring the accurate configuration of small flow ammonia water;
[0038] Fourthly, the ammonia dilution mixer proposed in the utility model adopts a modular type, which effectively improves the installation efficiency and maintenance efficiency, and can replace damaged parts in a targeted manner, thereby extending the service life of the ammonia dilution mixer;
[0039] Fifth, the control system proposed by the utility model can perform real-time control on the ammonia water dilution mixer according to the automatic calculation result, thereby effectively ensuring the accuracy of the concentration of the configured ammonia water. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0041] Figure 1 This is a structural diagram of the ammonia dilution device in Example 1 of the utility model;
[0042] Figure 2 This is an external control block diagram of the ammonia dilution equipment in Example 2 of the utility model. DETAILED DESCRIPTION
[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0044] The existing ammonia dilution equipment cannot achieve automated control, which makes it easy for safety accidents to occur due to human errors. It also uses only one dilution and mixing, resulting in poor absorption effect and uneven concentration. In addition, it leads to a narrow dilution range, and one set of equipment cannot cover the amount of ammonia required for various low, medium and high dilutions.
[0045] Example 1
[0046] like Figure 1 and Figure 2 As shown, in order to solve the above problems, this embodiment proposes a high-efficiency ammonia water dilution device, including a primary mixing chamber 10, a secondary mixing chamber, a first heat exchange device 21 and a second heat exchange device 22; a pure water inlet 101 and a liquid ammonia inlet 102 are provided at the top of the primary mixing chamber 10; a discharge hole 104 for ammonia water to pass through is provided on the side wall of the primary mixing chamber 10; the secondary mixing chamber fully wraps the discharge hole 104 on the side wall of the primary mixing chamber 10; the first heat exchange device 21 fully covers the outer wall of the secondary mixing chamber; and the second heat exchange device 22 is arranged at the liquid outlet of the secondary mixing chamber. Among them, the pure water and liquid ammonia in the primary mixing chamber 10 are cooled by disturbance mixing to form ammonia water.
[0047] Preferably, in this embodiment, there are multiple discharge holes 104 , which are evenly distributed on the side wall of the primary mixing chamber 10 .
[0048] Preferably, the discharge hole 104 of the primary mixing chamber 10 in this embodiment is φ10 mm.
[0049] Preferably, in this embodiment, the side walls of the primary mixing chamber 10 may be connected to and filled with cooling water, so that the heat generated when the liquid ammonia is diluted can be conducted through the side walls.
[0050] Preferably, in this embodiment, the centers of the primary mixing chamber 10, the secondary mixing chamber and the second heat exchange device 22 are located on the same vertical line, and the secondary mixing chamber adopts a concave structure so that the primary mixing chamber 10 is wrapped around the center of the secondary mixing chamber.
[0051] Preferably, in this embodiment, the first heat exchange device 21 is a cooling water shell, that is, the cooling water shell is wrapped around the outside of the secondary mixing chamber, and the heat exchange process between the cooling water and the ammonia water is achieved through heat conduction of the shell wall.
[0052] In this embodiment, the mixing process is prolonged by the primary mixing chamber 10 and the secondary mixing chamber, so that the mixing of liquid ammonia and pure water is more complete and uniform, thereby enabling the concentration of ammonia water to be adjusted within a wide range to meet the needs of different users; in addition, the first heat exchange device 21 is used to effectively cool the mixing chamber to avoid damage to the equipment due to thermal expansion.
[0053] More specifically, the secondary mixing chamber includes a secondary mixing chamber 12 and a tertiary mixing chamber 13; the secondary mixing chamber 12 completely wraps the discharge hole 104 on the side wall of the primary mixing chamber 10; the primary mixing chamber 10, the secondary mixing chamber 12 and the tertiary mixing chamber 13 are arranged in sequence from top to bottom; the first heat exchange device 21 wraps the secondary mixing chamber 12 and the tertiary mixing chamber 13.
[0054] In this embodiment, a primary mixing chamber 10, a secondary mixing chamber 12 and a tertiary mixing chamber 13 are arranged from top to bottom, which can effectively avoid the problem of uneven ammonia concentration distribution caused by the backflow of ammonia water. In addition, in this embodiment, the mixing time is further extended through primary mixing, secondary mixing and tertiary mixing, which helps to improve the uniformity of the concentration distribution of ammonia water.
[0055] More specifically, the secondary mixing chamber 12 includes a first discharge tube 121, a liquid sealing groove 122 and a cover shell 123; the first discharge tube 121 is protruded at the bottom of the secondary mixing chamber 12; the first discharge tube 121 is connected to the tertiary mixing chamber 13; the liquid sealing groove 122 is arranged on the outside of the first discharge tube 121; the cover shell 123 is arranged in the liquid sealing groove 122, and the inner diameter of the cover shell 123 is larger than the outer diameter of the first discharge tube 121; when ammonia water fills the liquid sealing groove 122, the cover shell 123 floats up and liquid seals the first discharge tube 121.
[0056] Preferably, in this embodiment, the first discharge tube 121 is arranged at a height 150 mm higher than the bottom of the secondary mixing chamber 12 , that is, when the ammonia water in the secondary mixing chamber 12 gradually accumulates to a height of 150 mm, it overflows from the first discharge tube 121 into the tertiary mixing chamber 13 .
[0057] Preferably, the liquid sealing groove 122 in this embodiment is arranged so that a connecting structure is formed between the liquid sealing groove 122 and the secondary mixing chamber 12 and the first discharge tube 121. When the ammonia water is not diluted, ammonia water at a certain liquid level in the liquid sealing groove 122 forms a water seal, which effectively isolates the primary mixing chamber 10 and the tertiary mixing chamber 13 to prevent air from entering.
[0058] In this embodiment, when the ammonia water flows into the first discharge tube 121, it is mixed by a first baffle and distributed through the discharge hole 104 of the primary mixing chamber 10φ10mm, thereby forming a secondary mixing.
[0059] More specifically, the secondary mixing chamber also includes a quaternary mixing chamber 14; the quaternary mixing chamber 14 is protruded at the bottom of the tertiary mixing chamber 13; a discharge hole 141 connected to the tertiary mixing chamber 13 is opened on the side wall of the quaternary mixing chamber 14; a second discharge tube 142 is formed on the central protrusion of the quaternary mixing chamber 14, and the height of the second discharge tube 142 is higher than the highest height of the mist discharge hole; when the ammonia water fills the quaternary mixing chamber 14, the second discharge tube 142 is liquid-sealed.
[0060] Preferably, the discharge hole 141 on the side wall of the fourth mixing chamber 14 in this embodiment is a discharge hole 141 with a diameter of φ10 mm.
[0061] Preferably, the second discharge tube 142 protrudes from the bottom of the fourth mixing chamber 14 by 200 mm, that is, when the ammonia water gradually fills the fourth mixing chamber 14 from the tertiary mixing chamber 13, when the liquid level in the fourth mixing chamber 14 is higher than 200 mm, the ammonia water overflows from the second discharge tube 142 and enters the second heat exchange device 22, realizing the complete configuration of the ammonia water and cooling it.
[0062] In this embodiment, the raised setting of the second discharge tube 142 forms a liquid seal between the tertiary mixing chamber 13 and the quaternary mixing chamber 14, preventing the tertiary mixing chamber 13 and the quaternary mixing chamber 14 from being connected during the dilution process of the ammonia water, blocking the entry of air and avoiding the risk of flash explosion.
[0063] In this embodiment, the ammonia dilution and mixing device is provided with four mixing operations in total, which can fully dilute and mix the ammonia water to the required concentration, and control the uniformity of the ammonia water configuration concentration and the ammonia water concentration accuracy to <±0.5%; it is also provided with double liquid seals to prevent air leakage, which can ensure that the ammonia water dilution and mixing device is in a closed state without air entering, thereby improving the safety of the ammonia water at this time; in addition, the dilution and mixing device is configured as a modular type, which is convenient for disassembly of the assembly ring and convenient replacement of damaged parts.
[0064] More specifically, a circulating ammonia water inlet 103 is also provided on the primary mixing chamber 10 ; the circulating ammonia water inlet 103 is arranged side by side with the pure water inlet 101 and the liquid ammonia inlet 102 ; the circulating ammonia water inlet 103 is also connected to the liquid outlet of the second heat exchange device 22 .
[0065] Preferably, in this embodiment, an ammonia water circulation delivery pump is also provided on the pipeline connecting the second heat exchange device 22 to the circulating ammonia water inlet 103 .
[0066] Preferably, in this embodiment, the liquid outlet of the second heat exchange device 22 is divided into two paths, one path is transported to the ammonia storage tank for storage and standby use, and the other path is used to circulate the ammonia water back to the primary mixing chamber 10 for ammonia dilution disturbance and cooling.
[0067] In this embodiment, circulating ammonia water is provided to ensure that the heat released by the liquid ammonia during the dilution process is taken away in time. In addition, the disturbance by large-flow ammonia water is more conducive to the full and uniform dilution of the ammonia water, especially when preparing small-flow ammonia water. The effect is more obvious because the amount of pure water and liquid ammonia required for preparing small-flow ammonia water is small, which may cause the ammonia dilution mixer to be unable to be filled and the fluidity is poor. A large-flow ammonia water must be used for disturbance to form rapid stirring.
[0068] More specifically, it also includes a buffer tank, the liquid inlet of the buffer tank is connected to the liquid outlet of the second heat exchange device 22; the liquid outlet of the buffer tank is connected to the ammonia water storage tank and the circulating ammonia water inlet 103 respectively.
[0069] Preferably, a liquid level meter and an ammonia water thermometer are installed on the buffer tank.
[0070] In this embodiment, the liquid level meter is used to observe the liquid level height of the ammonia water in the buffer tank, which is convenient for analyzing the current amount of ammonia water in the buffer tank. If the liquid level is high, it is necessary to increase the amount of ammonia water stored in the ammonia water storage tank to ensure a stable amount of ammonia water circulating in the current ammonia water dilution setting.
[0071] In this embodiment, the thermometer is used to observe the temperature of the circulating ammonia water. When the temperature is high, it is necessary to adjust the cooling water thermometer of the first heat exchange device 21, the cooling water temperature of the second heat exchange device 22, etc., to lower the temperature of the circulating ammonia water, so as to achieve the cooling effect of the circulating ammonia water in the primary mixing chamber 10 in this embodiment.
[0072] More specifically, the second heat exchange device 22 is a shell and tube heat exchanger; the tube side of the shell and tube heat exchanger is connected to the liquid outlet of the secondary mixing chamber, and the shell side is connected to the cooling water.
[0073] Preferably, in this embodiment, two cooling water inlets are provided on the shell and tube heat exchanger, and the two cooling water inlets are respectively arranged up and down along the flow direction of the diluted ammonia water.
[0074] More specifically, it also includes control valves for controlling the flow of pure water, liquid ammonia, cooling water, and circulating ammonia water respectively.
[0075] Preferably, the control valve comprises an electronic valve and a manual valve connected in series. The manual valve should be arranged close to the source and kept normally open.
[0076] Preferably but not limited to, in this embodiment, a bellows expansion joint is provided at the outlet of the ammonia dilution device to absorb the force caused by thermal expansion.
[0077] Preferably, but not limited to, the inlet pipes for pure water, liquid ammonia and circulating ammonia water to enter the primary mixing chamber 10 are lined with polytetrafluoroethylene sleeves to prevent erosion and corrosion.
[0078] Preferably but not limited to, the liquid ammonia and pure water electronic valves remain closed in the event of a failure.
[0079] Example 2
[0080] like Figure 2 As shown, in order to solve the above-mentioned problems, this embodiment proposes a control system for a high-efficiency ammonia dilution equipment, which is mainly used to control the ammonia dilution equipment of Example 1. The control system includes a controller, and a plurality of electronic control valves electrically connected to the control respectively; the controller is used to calculate the required pure water flow rate and liquid ammonia flow rate according to the received ammonia concentration and ammonia amount to be configured; and is also used to gradually control the corresponding electronic control valve opening according to the required pure water flow rate and liquid ammonia flow rate.
[0081] Preferably, the controller in this embodiment may adopt a PLC controller, and a DCS control may also be provided in this embodiment.
[0082] Preferably, in the present embodiment, during the ammonia production process controlled by PLC, the ammonia circulation delivery pump remains in operation, and ammonia is always circulating when returning to the primary mixing chamber 10. When ammonia production is required at any time, the ammonia concentration and amount to be prepared are input into the PLC controller, and the PLC controller is directly started. The PLC calculates the required pure water flow and liquid ammonia flow, and preferentially gradually opens the pure water electronic control valve to replenish pure water, and then gradually opens the liquid ammonia electronic control valve to replenish liquid ammonia. During this period, the ammonia circulation is always in operation, and circulating ammonia enters the primary mixing chamber 10. After stable operation, the liquid ammonia and pure water flow rates are adjusted according to the temperature and concentration detection data installed on the outlet pipe of the ammonia dilution mixer.
[0083] In this embodiment, PLC is used to control the ammonia production process. By analyzing the ammonia concentration, ammonia temperature, pure water flow rate, and liquid ammonia flow rate data, the liquid ammonia electronic control valve and the pure water electronic control valve are automatically adjusted to control the ammonia volume. When the ammonia temperature is high, the liquid ammonia electronic control valve and the pure water electronic control valve opening will be closed; when the ammonia concentration is high, the liquid ammonia electronic control valve will be closed, otherwise it will be opened. In this embodiment, a liquid level interlocking control is set in the ammonia buffer tank to prevent the risk of ammonia overflow due to excessively high liquid level; the risk of air inhalation due to evacuation when the liquid level is too low. When the liquid level is high, a signal is sent to the PLC, and the ammonia valve is closed through the PLC. When the liquid level is low, the ammonia delivery valve is closed. An ammonia thermometer is installed on the ammonia buffer tank pipeline to monitor the ammonia temperature at all times. When the ammonia temperature is too high, a signal is sent to the PLC to immediately reduce the amount of diluted ammonia to be prepared until the temperature returns to normal, and then the amount of ammonia to be prepared can be gradually increased to play a temperature protection role. An ammonia concentration meter is installed on the ammonia buffer tank pipeline to monitor the ammonia concentration at all times. When the ammonia concentration deviates from the set concentration and cannot be restored, a signal is sent to the PLC to immediately stop the ammonia preparation. It can only be prepared again after the cause is found and eliminated.
[0084] It should be emphasized that by setting the diluted ammonia concentration in advance, starting the ammonia circulation pump in sequence according to the program, establishing a large ammonia circulation, introducing liquid ammonia and pure water, and realizing PLC one-button start to prepare ammonia of various required concentrations, the operation is simpler, safer and more efficient, the effect is better, and the occurrence of human operational errors is reduced.
[0085] In summary, Embodiment 1 and Embodiment 2 propose a high-efficiency ammonia water dilution equipment and a control system thereof, which increases the number of ammonia water mixing chambers and prolongs the ammonia water dilution time to ensure that the ammonia water is fully mixed and has a uniform concentration. At the same time, ammonia water of different concentrations can be smoothly prepared to meet the needs of different users. At the same time, PLC control is used to achieve one-button start and stop, automatic preparation of ammonia water, etc., thereby ensuring the safety monitoring function of ammonia water preparation.
[0086] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.
Claims
1. A high-efficiency ammonia dilution device, characterized in that: include: A primary mixing chamber, wherein a pure water inlet and a liquid ammonia inlet are provided at the top of the primary mixing chamber, and a discharge hole for ammonia water to pass through is provided on the side wall of the primary mixing chamber; A secondary mixing chamber, wherein the secondary mixing chamber completely surrounds the discharge hole of the side wall of the primary mixing chamber; A first heat exchange device, wherein the first heat exchange device is arranged to completely cover the outer side wall of the secondary mixing chamber; a second heat exchange device, the second heat exchange device being disposed at a liquid outlet of the secondary mixing chamber; The pure water and liquid ammonia in the primary mixing chamber are mixed and cooled through disturbance to form ammonia water.
2. A high-efficiency ammonia dilution device according to claim 1, characterized in that: The secondary mixing chamber comprises: A secondary mixing chamber, wherein the secondary mixing chamber completely surrounds the discharge hole of the side wall of the primary mixing chamber; Tertiary mixing chamber; The primary mixing chamber, the secondary mixing chamber and the tertiary mixing chamber are arranged in sequence from top to bottom; and the heat exchange device is arranged to wrap the secondary mixing chamber and the tertiary mixing chamber.
3. A high-efficiency ammonia dilution device according to claim 2, characterized in that: The secondary mixing chamber comprises: A first discharge tube; a protrusion of the first discharge tube is formed at the bottom of the secondary mixing chamber; the first discharge tube is connected to the tertiary mixing chamber; Liquid sealing groove; the liquid sealing groove is arranged on the outer side of the first discharge cylinder; The cover shell is disposed in the liquid seal groove, and the inner diameter of the cover shell is larger than the outer diameter of the first discharge cylinder; When the ammonia water fills the liquid sealing groove, the cover shell floats up and liquid seals the first discharge cylinder.
4. The high-efficiency ammonia dilution equipment according to claim 3, characterized in that: The secondary mixing chamber further comprises, A fourth mixing chamber, wherein the fourth mixing chamber protrudes from the bottom of the third mixing chamber; a discharge hole communicating with the third mixing chamber is provided on a side wall of the fourth mixing chamber; The central protrusion of the fourth mixing chamber is formed with a second discharge tube, and the height of the second discharge tube is higher than the highest height of the discharge hole; When the ammonia water fills the fourth mixing chamber, the second discharge cylinder is liquid-sealed.
5. A high-efficiency ammonia water dilution device according to any one of claims 1 to 4, characterized in that: The primary mixing chamber is also provided with: A circulating ammonia water inlet, wherein the circulating ammonia water inlet is arranged side by side with the pure water inlet and the liquid ammonia inlet; The circulating ammonia water inlet is connected to the liquid outlet of the second heat exchange device.
6. A high-efficiency ammonia dilution device according to claim 5, characterized in that: Also includes: A buffer tank, wherein the liquid inlet of the buffer tank is connected to the liquid outlet of the second heat exchange device; the liquid outlet of the buffer tank is respectively connected to the ammonia water storage tank and the circulating ammonia water inlet.
7. The high-efficiency ammonia dilution equipment according to claim 6, characterized in that: The second heat exchange device is a shell and tube heat exchanger; the tube side of the shell and tube heat exchanger is connected to the liquid outlet of the secondary mixing chamber, and the shell side is connected to cooling water.
8. The high-efficiency ammonia dilution equipment according to claim 7, characterized in that: It also includes control valves for controlling the flow of pure water, liquid ammonia, cooling water and circulating ammonia water respectively.
9. A control system for a high-efficiency ammonia dilution device, characterized in that: It includes a controller, and a plurality of electronic control valves electrically connected to the controller respectively; The controller is used to calculate the required pure water flow and liquid ammonia flow according to the received ammonia water concentration and ammonia water amount to be configured; and is also used to gradually control the corresponding opening of the electronic control valve according to the required pure water flow and liquid ammonia flow.