Ammonia water preparation system

Abstract

The invention discloses an ammonia water preparation system, and relates to the technical field of ammonia water. According to the invention, a'dilution area-stable area 'constructed by the partition plate in the ammonia water tank is combined with reflux pressure rapid mixing and standing homogenization, so that the problem of non-uniform local concentration is thoroughly solved, and the fluctuation range of the product concentration is reduced; meanwhile, through an ammonia absorption cooler and a built-in annular spraying countercurrent design, the total absorption rate of ammonia gas is improved; the safe water seal tank forms a water seal barrier through demineralized water, absorbs escaped ammonia gas and converts the escaped ammonia gas into dilute ammonia water for backflow, and nearly 100% ammonia resource recovery is achieved while the risk of ammonia gas leakage is eradicated.

Description

Technical Field

[0001] This invention relates to the field of ammonia technology, and more specifically to an ammonia preparation system. Background Technology

[0002] Recovering and utilizing ammonia gas extracted from the side stream of amino acid-containing water stripping units in oil refining and chemical enterprises to produce ammonia water is an important way to realize ammonia resource utilization in the oil refining, chemical, and environmental protection fields. However, existing ammonia recovery and preparation systems have many technical bottlenecks and cannot meet the requirements of high efficiency, safety, and stability for highly volatile industrial production. In traditional absorption devices, ammonia gas is introduced into the absorption liquid. The prepared ammonia water is not fully mixed in the storage tank, which can easily lead to localized high concentrations or fluctuations, affecting the stability of product quality. Especially when used as a desulfurization and denitrification agent or chemical raw material, concentration deviations can lead to incomplete reactions or excessive emissions. Furthermore, the volatile nature of ammonia makes it difficult for conventional mixers that directly mix ammonia and demineralized water to quickly dissolve and absorb ammonia. Ammonia also easily accumulates and escapes from ammonia storage tanks. Existing systems lack efficient ammonia recovery mechanisms, resulting in both ammonia resource waste and the risk of toxic gas leaks. Some units lack pressure balance control; when the tank pressure is lower than the external system, air can easily be drawn in, forming an explosive mixture, and there are significant safety hazards associated with manual ammonia exposure during operation. Moreover, the heat released during ammonia dissolution in traditional ammonia preparation is difficult to remove quickly, causing the absorbent temperature to rise and further exacerbating ammonia volatilization. The lack of linkage between the cooling system and the ammonia feed rate leads to energy waste.

[0003] Given the aforementioned problems with existing ammonia preparation systems, it is necessary to design a more efficient, safe, and stable ammonia preparation system. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide an ammonia preparation system. By constructing a "dilution zone-stabilization zone" through the partition plate inside the ammonia tank, and by combining rapid mixing with static homogenization through reflux pressure, the problem of uneven local concentration is completely solved and the fluctuation range of product concentration is reduced. At the same time, the ammonia absorption cooler combined with the annular spray countercurrent design improves the total ammonia absorption rate.

[0005] The technical solution of this invention is as follows: An ammonia water preparation system includes an ammonia absorption cooler, an ammonia water tank, and a safety water seal tank. The ammonia absorption cooler includes a shell containing an ammonia absorption chamber and a circulating cold water pipe bundle. An ammonia gas delivery pipe and an ammonia water output pipe are connected to the shell. A guide tube is installed inside the shell, with its bottom outlet submerged below the ammonia water level. The guide tube is connected to the ammonia gas delivery pipe. The ammonia water output pipe is connected to the ammonia water tank. A vertical partition plate is installed inside the ammonia water tank, with the ammonia water inlet and outlet located on opposite sides of the partition plate, which extends above the inlet and outlet. The ammonia water tank is connected to a demineralized water delivery pipe and an ammonia gas escape pipe, which is connected to the safety water seal tank. The safety water seal tank is connected to a second demineralized water delivery pipe and a dilute ammonia water delivery pipe. The ammonia outlet pipe is connected to the ammonia tank; the ammonia outlet of the ammonia tank is connected to a second ammonia outlet pipe, which is equipped with an ammonia concentration detector. The second ammonia outlet pipe is connected to an ammonia pump, which is connected to an ammonia circulation pipe and an ammonia product pipe. Remote control valves are installed on the ammonia circulation pipe and the ammonia product pipe respectively; the ammonia circulation pipe is connected to the top of the shell of the ammonia absorption cooler through a branch pipe 1 and several branch pipes 2. An annular spray pipe is installed at the top of the shell, and spray nozzles are installed at the bottom of the annular spray pipe. The annular spray pipe is connected to the branch pipe 1; several circulating ammonia diversion pipes are installed inside the shell. The bottom outlet of the circulating ammonia diversion pipe is submerged below the ammonia liquid level inside the shell. The circulating ammonia diversion pipe is connected to the branch pipes 2.

[0006] Preferably, the guide tube has ammonia gas distribution outlet holes on its wall below the ammonia water surface; a distribution plate with outlet holes is provided at the bottom outlet of the guide tube.

[0007] Preferably, the ammonia tank is equipped with a remote level gauge, a local level indicator, and a temperature sensor.

[0008] Preferably, the ammonia absorption cooler is equipped with a remote level gauge II and a local level indicator II.

[0009] Preferably, the ammonia tank is equipped with a pressure sensor and a nitrogen delivery pipe is connected to the top of the ammonia tank, and a nitrogen sealing valve is installed on the nitrogen delivery pipe.

[0010] Preferably, the ammonia gas delivery pipe is equipped with a flow meter one, and the ammonia water circulation pipe is equipped with a flow meter two and a regulating valve one; the circulating cold water pipe bundle is connected to a circulating cold water input pipe and a circulating hot water output pipe, the circulating cold water input pipe is equipped with a regulating valve two, and the circulating hot water output pipe is equipped with a valve; the ammonia water output pipe one is equipped with a temperature sensor one.

[0011] Preferably, the ammonia tank is provided with a heat insulation layer on the outside.

[0012] Preferably, a flow-limiting orifice plate is installed on the second demineralized water delivery pipe.

[0013] Preferably, the shell of the ammonia absorption cooler and the bottom of the ammonia tank are respectively connected to a drain pipe, and a drain valve is installed on the drain pipe.

[0014] Preferably, the ammonia absorption cooler has a quick-opening maintenance manhole on its shell side, a maintenance platform on the top of the ammonia tank, a spiral staircase on the maintenance platform, and guardrails around the platform.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The ammonia absorption cooler of this invention features ammonia distribution outlets on the lower wall of the inner guide tube, which, in conjunction with the outlets on the bottom distribution plate, disperses ammonia into microbubbles and directly injects them into the ammonia absorption liquid. This significantly increases the gas-liquid contact area and greatly improves the mass transfer rate compared to traditional devices. The circulating ammonia water forms an atomized counter-current contact through an annular spray pipe, achieving secondary capture of unabsorbed ammonia and greatly improving the ammonia absorption rate. Simultaneously, the partition plate inside the ammonia tank constructs a dual-zone system of "dilution zone - stabilization zone," utilizing a combination of rapid mixing and static homogenization through backflow pressure to completely solve the problem of uneven local concentration, reducing product concentration fluctuations and meeting the precision requirements of industrial applications. 2. In this invention, the safety water seal tank forms a water seal barrier using demineralized water, efficiently absorbing escaping ammonia gas and converting it into dilute ammonia water for reflux. This eliminates the risk of ammonia leakage while achieving nearly 100% ammonia resource recovery. The ammonia water tank's micro-positive pressure control effectively prevents air intake, and the external insulation layer reduces pressure increases caused by ammonia gas escape due to temperature rise. This dual safety guarantee meets chemical explosion-proof standards. Furthermore, the bottom drain pipe thoroughly removes residual liquid and impurities, reducing equipment corrosion rates and extending service life. 3. In this invention, the ammonia flow rate, ammonia water output temperature, and circulating cooling water system are linked and regulated by a DCS system. Real-time feedback signals from a flow meter and a temperature sensor automatically match the circulating ammonia water volume and circulating cooling water volume, maintaining system stability even when the ammonia feed rate fluctuates, while simultaneously reducing energy consumption. Furthermore, this invention uses an online ammonia water concentration detector to replace manual titration, achieving real-time concentration monitoring and automatic valve switching, seamlessly connecting cyclic preparation and product output, and reducing manual operation. 4. In this invention, the quick-opening manhole of the ammonia absorption cooler allows direct access to replace the guide tube and distribution plate without overall disassembly; the maintenance platform on top of the ammonia tank, equipped with a spiral ladder and guardrails, provides safe operating space for instrument inspection. A dual-level monitoring system, consisting of remote level gauge 1 and local level indicator 1, as well as remote level gauge 2 and local level indicator 2, synchronously monitors the equipment level, completely preventing overflow from a full tank or dry pump operation accidents, and improving the overall efficiency of equipment operation and maintenance. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the ammonia preparation system of the present invention.

[0017] In the diagram: 1. Shell; 101. Ammonia absorption chamber; 1011. Ammonia gas delivery pipe; 1012. Ammonia water output pipe 1; 102. Circulating cold water pipe bundle; 1021. Circulating cold water input pipe; 1022. Circulating hot water output pipe; 1023. Valve; 103. Flow guide tube; 104. Distribution plate; 105. Remote level gauge 2; 106. Local level indicator 2; 2. Ammonia water tank; 201. Divider plate; 202. Demineralized water delivery pipe 1; 203. Ammonia gas escape pipe; 204. Ammonia water output pipe 2; 205. Remote level gauge 1; 206. Local level indicator 1; 207. Pressure sensor; 3. Safety water seal Tank; 301, Demineralized Water Delivery Pipe II; 302, Dilute Ammonia Water Output Pipe; 303, Flow Limiting Orifice Plate; 4, Ammonia Water Concentration Detector; 5, Ammonia Water Pump; 601, Ammonia Water Circulation Pipe; 602, Ammonia Water Product Pipe; 7, Remote Switch Valve; 801, Branch Pipe I; 802, Branch Pipe II; 901, Circulating Spray Pipe; 902, Spray Nozzle; 10, Circulating Ammonia Diversion Pipe; 11, Nitrogen Delivery Pipe; 1101, Nitrogen Sealing Valve; 12, Flow Meter I; 13, Flow Meter II; 14, Regulating Valve I; 15, Regulating Valve II; 16, Temperature Sensor I; 1701, Sewage Pipe; 1702, Sewage Valve; 18, Temperature Sensor II. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention.

[0019] Example 1 like Figure 1 As shown, this embodiment provides an ammonia water preparation system, including an ammonia absorption cooler, an ammonia water tank 2, and a safety water seal tank 3. The ammonia absorption cooler includes a shell 1, and the shell 1 is provided with an ammonia absorption chamber 101 and a circulating cold water tube bundle 102. The ammonia absorption chamber 101 is the place where ammonia gas comes into contact with ammonia water and dissolves in the ammonia water to prepare ammonia water. The tube side of the circulating cold water tube bundle 102 is the place where circulating cold water flows, and the circulating cold water carries away the heat released by the dissolution of ammonia gas in the ammonia water.

[0020] like Figure 1As shown, the shell 1 of the ammonia absorption cooler is connected to an ammonia gas delivery pipe 1011 and an ammonia water output pipe 1012. A guide cylinder 103 is provided inside the shell 1, and the bottom outlet of the guide cylinder 103 is submerged below the ammonia water level inside the shell 1. The guide cylinder 103 is connected to the ammonia gas delivery pipe 1011. An ammonia gas distribution outlet hole is provided on the cylinder wall of the guide cylinder 103 below the ammonia water level, and a distribution plate 104 is provided at the bottom outlet of the guide cylinder 103, with outlet holes distributed on the distribution plate 104. Ammonia gas enters the guide cylinder 103 through the ammonia gas delivery pipe 1011. It is distributed into tiny bubbles by the ammonia gas distribution outlets on the lower wall of the guide cylinder 103 and the outlets on the bottom distribution plate 104, and then directly enters and dissolves in the ammonia water inside the shell 1. The ammonia gas distribution outlets on the lower wall of the guide cylinder 103 and the outlets on the distribution plate 104 significantly increase the gas-liquid contact area, thereby improving the mass transfer rate and allowing the ammonia gas to dissolve rapidly in the ammonia water, thus enhancing the mass transfer effect. The ammonia water output pipe 1012 is connected to the ammonia water tank 2. A vertical partition plate 201 is installed inside the ammonia water tank 2. The ammonia water inlet and outlet of the ammonia water tank 2 are located on opposite sides of the partition plate 201, and the partition plate 201 is higher than the ammonia water inlet and outlet. The ammonia water, after absorbing ammonia gas and being cooled by circulating cold water, enters the ammonia water tank 2 from the ammonia water output pipe 1012 at the bottom of the shell 1, and is evenly distributed within the ammonia water tank 2 to ensure uniform concentration. The partition plate 201 divides the ammonia tank 2 into a "dilution zone" and a "stabilization zone". The dilution zone is located at the bottom of the tank and is connected to the ammonia absorption cooler through the ammonia output pipe 1012. The ammonia is rapidly mixed by utilizing the backflow pressure of the subsequent ammonia pump 5. The stabilization zone is located in the upper part of the tank and on the side of the ammonia pump 5. This allows the high-concentration ammonia to have a longer flow path, allowing it to stand and mix evenly. This ensures that the concentration is uniform before it is output into the ammonia pump 5, avoiding the problem of excessively high local concentrations.

[0021] The ammonia tank 2 is equipped with an external heat insulation layer. The inner layer of the insulation layer uses foam glass, and the outer layer uses aluminum alloy sheet. This reduces the risk of increased pressure in the ammonia tank 2 due to ammonia gas release caused by rising temperatures. A temperature sensor 18 is installed on the ammonia tank 2 to monitor the internal temperature in real time. Figure 1 As shown, ammonia tank 2 is connected to a demineralized water delivery pipe 202 and an ammonia gas escaping pipe 203. The ammonia gas escaping pipe 203 is connected to a safety water seal tank 3, which is connected to a demineralized water delivery pipe 301 and a dilute ammonia water output pipe 302. A flow-limiting orifice plate 303 is installed on the demineralized water delivery pipe 301 to prevent excessive demineralized water flow from causing the water seal of the safety water seal tank 3 to exceed its height, thus posing a safety risk to ammonia tank 2. The dilute ammonia water output pipe 302 is connected to ammonia tank 2. A small amount of ammonia gas discharged from ammonia tank 2 enters the safety water seal tank 3 through the ammonia gas escaping pipe 203 at the top of the tank. The water seal water in the safety water seal tank 3 uses demineralized water, and the ammonia gas is absorbed by the water seal water. The resulting dilute ammonia water then flows back to ammonia tank 2 through the dilute ammonia water output pipe 302, which can both replenish the demineralized water used for preparing ammonia water and prevent the waste of ammonia gas.

[0022] like Figure 1 As shown, the ammonia outlet of ammonia tank 2 is connected to an ammonia output pipe 204. An ammonia concentration detector 4 is installed on the ammonia output pipe 204. An ammonia pump 5 is connected to the ammonia output pipe 204. The ammonia pump 5 is connected to an ammonia circulation pipe 601 and an ammonia product pipe 602. Remote switching valves 7 are respectively installed on the ammonia circulation pipe 601 and the ammonia product pipe 602. The ammonia concentration detector 4 monitors the concentration of the ammonia output from ammonia tank 2 in real time, accurately controlling the ammonia concentration. Based on the concentration standard of the ammonia product, the remote switching valves 7 on the ammonia circulation pipe 601 and the ammonia product pipe 602 are switched in a timely manner, allowing the ammonia output from ammonia tank 2 to continue circulating and participating in ammonia preparation or as a product output. This automates the ammonia preparation and storage process while reducing manual labor intensity.

[0023] like Figure 1 As shown, the ammonia water circulation pipe 601 is connected to the top of the shell 1 of the ammonia absorption cooler through branch pipe 1 801 and several branch pipes 2 802. An annular spray pipe 901 is provided at the top of the shell 1, and spray nozzles 902 are installed at the bottom of the annular spray pipe 901. The annular spray pipe 901 is connected to branch pipe 1 801. Several circulating ammonia water diversion pipes 10 are provided inside the shell 1. The bottom outlet of the circulating ammonia water diversion pipe 10 is submerged below the ammonia water level inside the shell 1. The circulating ammonia water diversion pipe 10 is connected to branch pipes 2 802. Ammonia water circulating from ammonia tank 2 back to the ammonia absorption cooler is partially distributed into the annular spray pipe 901 via branch pipe 801, and then sprayed from top to bottom in an atomized spray form through spray nozzles 902. The spray liquid forms a countercurrent contact with the rising ammonia gas, which on the one hand, performs secondary capture of ammonia gas that has not been completely absorbed by the ammonia water in shell 1, and on the other hand, reduces the temperature of the gas phase space in shell 1, reducing ammonia volatilization. The other part of the circulating ammonia water enters the circulating ammonia diversion pipe 10 through branch pipe 802, and directly enters the ammonia water in shell 1 to continue to participate in the preparation of ammonia water.

[0024] In addition, such as Figure 1 As shown, the bottom of the shell 1 of the ammonia absorption cooler and the ammonia tank 2 are respectively connected to a drain pipe 1701, and a drain valve 1702 is installed on the drain pipe 1701. When the machine is shut down, the drain valve 1702 can be opened to completely discharge the residual ammonia and impurities through the drain pipe 1701. This not only allows the residual ammonia to be recovered and the ammonia gas to be extracted for reprocessing, but also prevents the equipment from being corroded due to long-term accumulation of ammonia.

[0025] Meanwhile, the shell 1 of the ammonia absorption cooler is equipped with a quick-opening maintenance manhole on its side, allowing access to the interior of the ammonia absorption cooler to replace the guide tube 103 and distribution plate 104 without disassembling the entire equipment. The top of the ammonia tank 2 is equipped with a maintenance platform, which features a spiral staircase for access to the top of the tank. The maintenance platform is surrounded by guardrails, facilitating routine inspection and maintenance of valves, instruments, and other top components by operators.

[0026] Example 2 Based on Example 1, such as Figure 1 As shown, the ammonia tank 2 is equipped with a remote level gauge 205 and a local level indicator 206. The remote level gauge 205 is a cable-type magnetostrictive level gauge. Its float moves up and down with the rise and fall of the liquid level, sending a signal to the DCS system, allowing internal operators to monitor the real-time liquid level of the ammonia tank 2. Simultaneously, the ammonia tank 2 is also equipped with a local level indicator 206, installed on the ground next to the tank, allowing external operators to also check the liquid level. This dual-level monitoring system effectively prevents the ammonia tank 2 from overflowing or the ammonia pump 5 from running dry. Similarly, the ammonia absorption cooler shell 1 is equipped with a remote level gauge 105 and a local level indicator 106, enabling dual-level detection of the liquid level within the ammonia absorption cooler.

[0027] Example 3 Based on Example 1, such as Figure 1 As shown, the ammonia tank 2 is equipped with a pressure sensor 207, and a nitrogen delivery pipe 11 is connected to the top of the ammonia tank 2. A nitrogen sealing valve 1101 is installed on the nitrogen delivery pipe 11. Nitrogen gas is introduced into the ammonia tank 2 through the nitrogen delivery pipe 11, and the pressure inside the ammonia tank 2 is maintained at a slightly positive pressure by monitoring the pressure sensor 207. This can minimize the risk of the pressure inside the ammonia tank 2 falling below the negative pressure of the safety water seal tank 3, which would lead to the intake of a large amount of air and cause a safety hazard.

[0028] Example 4 Based on Example 1, such as Figure 1As shown, a flow meter 12 is installed on the ammonia gas delivery pipe 1011, and a flow meter 13 and regulating valve 14 are installed on the ammonia water circulation pipe 601. The tube side of the circulating cold water pipe bundle 102 is connected to the circulating cold water inlet pipe 1021 and the circulating hot water outlet pipe 1022. A regulating valve 15 is installed on the circulating cold water inlet pipe 1021, and a valve 1023 is installed on the circulating hot water outlet pipe 1022. A temperature sensor 16 is installed on the ammonia water outlet pipe 1012. The flow meter 12 monitors the change in the ammonia gas flow rate delivered by the ammonia gas delivery pipe 1011 in real time, and the temperature sensor 16 monitors the change in the temperature of the ammonia water output from the ammonia absorption cooler in real time. The signals are transmitted to the DCS system in real time, thereby automatically controlling the regulating valve 14 and regulating valve 15 to adjust the circulating ammonia water volume and the circulating cold water supply. When the ammonia gas supply increases, the circulating ammonia water volume can be increased accordingly, and the circulating cold water volume can be increased to exchange heat and remove more of the heat released by the ammonia gas dissolution.

Claims

1. An ammonia water preparation system, characterized in that, It includes an ammonia absorption cooler, an ammonia water tank (2), and a safety water seal tank (3); the ammonia absorption cooler includes a shell (1), an ammonia absorption chamber (101) and a circulating cold water pipe bundle (102) are provided inside the shell (1), an ammonia gas conveying pipe (1011) and an ammonia water output pipe (1012) are connected to the shell (1), a guide tube (103) is provided inside the shell (1) and the bottom outlet of the guide tube (103) is submerged below the ammonia water liquid level inside the shell (1), and the guide tube (103) is connected to the ammonia gas conveying pipe (1011); the ammonia water output pipe (1012) 1012) is connected to the ammonia tank (2). The ammonia tank (2) is vertically equipped with a partition plate (201). The ammonia inlet and ammonia outlet of the ammonia tank (2) are located on both sides of the partition plate (201), and the partition plate (201) is higher than the ammonia inlet and ammonia outlet. The ammonia tank (2) is connected to a demineralized water conveying pipe (202) and an ammonia gas escaping pipe (203). The ammonia gas escaping pipe (203) is connected to a safety water seal tank (3). The safety water seal tank (3) is connected to a demineralized water conveying pipe (301) and a dilute ammonia water output pipe (302). A dilute ammonia water output pipe (302) is connected to an ammonia water tank (2); the ammonia water outlet of the ammonia water tank (2) is connected to an ammonia water output pipe two (204), an ammonia water concentration detector (4) is installed on the ammonia water output pipe two (204), an ammonia water pump (5) is connected to the ammonia water output pipe two (204), the ammonia water pump (5) is connected to an ammonia water circulation pipe (601) and an ammonia water product pipe (602), and remote switch valves (7) are respectively installed on the ammonia water circulation pipe (601) and the ammonia water product pipe (602); the ammonia water circulation pipe (601) is connected to a branch pipe one (8) 01) and several branch pipes (802) are connected to the top of the shell (1) of the ammonia absorption cooler. An annular spray pipe (901) is provided at the top of the shell (1). A spray nozzle (902) is installed at the bottom of the annular spray pipe (901). The annular spray pipe (901) is connected to the branch pipe (801). Several circulating ammonia water diversion pipes (10) are provided inside the shell (1). The bottom outlet of the circulating ammonia water diversion pipe (10) is submerged below the ammonia water liquid level inside the shell (1). The circulating ammonia water diversion pipe (10) is connected to the branch pipe (802).

2. The ammonia water preparation system as described in claim 1, characterized in that, The guide tube (103) has ammonia gas distribution outlet holes on its wall below the ammonia water surface; a distribution plate (104) is provided at the bottom outlet of the guide tube (103), and outlet holes are distributed on the distribution plate (104).

3. The ammonia water preparation system as described in claim 1, characterized in that, The ammonia tank (2) is equipped with a remote level gauge (205), a local level indicator (206), and a temperature sensor (18).

4. The ammonia water preparation system as described in claim 1, characterized in that, The ammonia absorption cooler housing (1) is equipped with a remote level gauge 2 (105) and a local level indicator 2 (106).

5. The ammonia water preparation system as described in claim 1, characterized in that, The ammonia tank (2) is equipped with a pressure sensor (207) and a nitrogen delivery pipe (11) is connected to the top of the ammonia tank (2). A nitrogen sealing valve (1101) is installed on the nitrogen delivery pipe (11).

6. The ammonia water preparation system as described in claim 1, characterized in that, A flow meter 1 (12) is installed on the ammonia gas delivery pipe (1011), and a flow meter 2 (13) and a regulating valve 1 (14) are installed on the ammonia water circulation pipe (601); the circulating cold water pipe bundle (102) is connected to the circulating cold water input pipe (1021) and the circulating hot water output pipe (1022) in the pipe side cavity, a regulating valve 2 (15) is installed on the circulating cold water input pipe (1021), and a valve (1023) is installed on the circulating hot water output pipe (1022); a temperature sensor 1 (16) is installed on the ammonia water output pipe 1 (1012).

7. The ammonia water preparation system as described in claim 1, characterized in that, The ammonia tank (2) is provided with an external heat insulation layer.

8. The ammonia water preparation system as described in claim 1, characterized in that, A flow-limiting orifice plate (303) is installed on the second demineralized water delivery pipe (301).

9. The ammonia water preparation system as described in claim 1, characterized in that, The bottom of the shell (1) of the ammonia absorption cooler and the ammonia tank (2) are respectively connected to a drain pipe (1701), and a drain valve (1702) is installed on the drain pipe (1701).

10. The ammonia water preparation system as described in claim 1, characterized in that, The shell (1) of the ammonia absorption cooler is provided with a quick-opening maintenance manhole on the side, and the top of the ammonia tank (2) is provided with a maintenance platform. The maintenance platform is provided with a spiral ladder and protective railings are installed around the platform.

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