A wet hydrogen ammonia removal device

Abstract

The utility model relates to the technical field of chemical synthesis, propose a kind of wet hydrogen gas ammonia removal device, the device includes hydrogen washing tower and dilute acid tank, the dilute acid tank is set in hydrogen washing tower top, and is communicated with hydrogen washing tower by acid inlet pipeline;The wet hydrogen gas ammonia removal device is not reformed to hydrogen washing tower inside, device structure is simple, and it reduces the difficulty of cleaning and maintenance cost, to join the dilute hydrochloric acid mode to the pH value of washing condensate in hydrogen washing tower is adjusted, promote the movement of ammonia gas dissolution balance, increase the solubility of ammonia in water, and hydrogen chloride contained in dilute hydrochloric acid can react with ammonia gas to form the ammonium chloride that is easily soluble in water, increase the ammonia removal effect, effectively remove the trace ammonia gas entrained in wet hydrogen gas generated by electrolysis, reduce the frequency of subsequent hydrogen chloride synthesis furnace lamp holder blockage, reduce the risk of system.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a wet hydrogen ammonia removal device. Background Technology

[0002] In the chlor-alkali chemical industry, sodium hydroxide (or potassium hydroxide), hydrogen, and chlorine are typically produced by electrolyzing brine, and then used as raw materials to produce a series of products. The hydrogen chloride synthesis section is a downstream unit of the secondary brine electrolysis section in the chlor-alkali industry. It mainly utilizes the hydrogen and chlorine produced in the secondary brine electrolysis section to react in a hydrogen chloride synthesis furnace to generate hydrogen chloride. Depending on actual needs, the hydrogen chloride is then either exported or an absorption device is installed to prepare high-purity hydrochloric acid. The wet hydrogen and wet chlorine produced by electrolysis carry water mist, which needs to be cooled and the water mist removed from the wet hydrogen and wet chlorine before entering the hydrogen chloride synthesis furnace for reaction.

[0003] The current problems and shortcomings of hydrogen scrubbing towers in chlorine-hydrogen treatment are as follows: In the electrolysis process of the chlor-alkali industry, trace amounts of NH4 remain in the brine entering the electrolytic cell. + The following reaction occurs at the cathode: NH4 + +OH - →NH3↑+H2O, which may cause trace amounts of ammonia (NH3) to be carried in the wet hydrogen gas produced at the cathode.

[0004] Because chlorine is a toxic gas, leaks into the environment can easily cause accidents such as poisoning of people and environmental pollution. In the industry, hydrogen chloride synthesis furnaces generally adopt the practice of "hydrogen-encased chlorine" (that is, hydrogen and chlorine enter the gap between the inner and outer tubes of the furnace bottom lamp holder and the inner tube respectively, with hydrogen in the outer layer and chlorine in the inner layer), and the hydrogen flow rate is slightly higher than the chlorine flow rate to prevent chlorine leakage. Traditional hydrogen scrubbing towers primarily clean wet hydrogen through the circulation and spraying of scrubbing water. However, when the wet hydrogen from upstream units carries trace amounts of ammonia, it cannot effectively remove the ammonia. When the hydrogen carrying trace amounts of ammonia enters the synthesis furnace and reacts with chlorine, the ammonia reacts with hydrogen chloride to form ammonium chloride. The temperature gradient in the furnace's lamp head area is significant, with a high temperature at the center and a low temperature at the outer edge. Ammonium chloride solidifies under the lower temperature conditions on the outer edge, and over time, this accumulation can easily lead to blockage of the furnace lamp head, affecting normal production. This necessitates furnace shutdown for maintenance and removal of the blockage deposits. In severe cases, the deposits can narrow the gas passage in the lamp head, causing localized overheating or flameout. Furthermore, higher ammonia content may generate nitrogen trichloride, which poses an explosive hazard, increasing the risk to the production system.

[0005] Most existing technologies modify the internal structure of hydrogen scrubbing towers to remove alkali mist (NaOH) or ammonia from hydrogen. For example, patent CN219942329U discloses a hydrogen scrubbing tower that solves the problem of salt buildup at the lamp head caused by uneven gas distribution and low alkali vapor removal rate in traditional hydrogen scrubbing towers by setting up a gas distribution plate, bubble cap layer, and cleaning components. Although this improves the alkali vapor removal rate and extends the furnace turnover cycle, the resulting hydrogen scrubbing tower has a relatively complex internal structure and requires manual replacement of cleaning brushes through a flange window, making cleaning and maintenance difficult. Patent CN213725651U discloses an ammonia removal device for a hydrogen recovery system. Through the synergistic action of a cyclone generator and upper and lower filter water films, it solves the problem of insufficient ammonia dispersion in traditional hydrogen scrubbing towers, resulting in incomplete mixing with water and low ammonia removal efficiency. However, it further introduces problems such as system reliance on multi-point valve control leading to complex structure, easy filter clogging, and high operation and maintenance costs. Utility Model Content

[0006] To address the problems of low ammonia removal efficiency leading to furnace lamp blockage, excessive ammonia content affecting production safety, complex internal structure, difficult cleaning, and high maintenance costs in existing technologies, this utility model discloses a wet hydrogen ammonia removal device. The device has a simple structure and can effectively remove trace amounts of ammonia entrained in wet hydrogen, reducing the frequency of furnace cleaning and blockage removal in hydrogen chloride synthesis furnaces and the risk of ammonia leakage, while also reducing the difficulty of equipment cleaning and maintenance costs.

[0007] To achieve the above technical objectives, this utility model proposes a wet hydrogen ammonia removal device, which includes a hydrogen scrubbing tower and a dilute acid tank. The dilute acid tank is arranged above the hydrogen scrubbing tower according to the liquid level difference. The bottom of the hydrogen scrubbing tower is provided with an acid inlet, and the dilute acid tank is connected to the acid inlet through an acid inlet pipeline. A circulation pump is provided at the circulating water outlet of the hydrogen scrubbing tower, and the circulating water outlet, the circulation pump, and the circulating water inlet are connected through a circulation pipeline.

[0008] When wet hydrogen gas is removed using the wet hydrogen ammonia removal device of this invention, ammonia gas dissolves and ionizes in water. The chemical equilibrium reaction equation is as follows: According to Le Chatelier's principle, the higher the hydroxide ion content in an aqueous solution, the more the equilibrium tends towards the reverse reaction, and the lower the solubility. The washing condensate in the hydrogen scrubbing tower is alkaline, and ammonia has low solubility in it. Introducing hydrogen chloride to adjust the pH increases the solubility of ammonia, thus improving the ammonia removal effect. Simultaneously, the introduced hydrogen chloride reacts with ammonia to form ammonium chloride, as shown in the reaction: NH3 + HCl → NH4Cl. Ammonium chloride is readily soluble in water, further enhancing ammonia removal. Therefore, the device of this invention adopts the above technical solution. By adding a dilute acid tank, dilute hydrochloric acid is directly added to the washing condensate in the hydrogen scrubbing tower to adjust the pH value, promoting a forward shift in equilibrium, increasing the solubility of ammonia in water, and the hydrogen chloride contained in the dilute hydrochloric acid reacts with ammonia to form readily soluble ammonium chloride, further enhancing the ammonia removal effect. The dilute acid tank is located above the hydrogen scrubbing tower. The height of the dilute acid tank can be adjusted according to the hydrogen pressure. Dilute hydrochloric acid can flow into the hydrogen scrubbing tower by gravity without the need for an additional delivery pump. At the same time, the liquid column generated acts as a liquid seal to prevent hydrogen from overflowing into the dilute acid tank.

[0009] It should be noted that in the wet hydrogen ammonia removal device of this utility model, the washing condensate refers to the mixed liquid generated during the circulating washing process, including liquid water formed by the condensation of water vapor in wet hydrogen during the washing process, the washing water used, and the mixed liquid formed by the impurities washed off dissolving in the washing water.

[0010] In some embodiments, the dilute acid tank is equipped with a Venturi mixer, which is connected to both a dilute hydrochloric acid inlet and a pure water inlet. This further optimizes the method of introducing dilute acid into the tank, allowing the concentration of dilute hydrochloric acid to be adjusted according to usage requirements, thus achieving the goal of controlling the concentration of dilute acid.

[0011] In some embodiments, a cooler is provided on the circulation pipeline, which is located at the output end of the circulation pump to achieve the purpose of cooling the washing condensate.

[0012] In some embodiments, an online pH analyzer is installed on the circulation pipeline. This further optimizes the pH detection method, achieving the goal of real-time monitoring of the pH value of the washing condensate.

[0013] In some embodiments, the online pH analyzer is located at the output of the cooler.

[0014] It should be noted that the online pH analyzer of this invention can be set at any position at the output end of the circulating pump, but the closer it is to the circulating pump, the better the effect, which can prevent the generation of bubbles and reduce measurement errors; when a cooler is provided, the preferred solution is to set the online pH analyzer at the output end of the cooler, which can reduce the influence of the washing condensate temperature.

[0015] In some embodiments, an acid content regulating valve assembly is provided on the acid inlet pipeline, which includes at least one automatic acid content regulating valve and several manual valves. This achieves the purpose of regulating the amount of dilute acid added to the hydrogen scrubbing tower and further optimizes the control method of dilute acid addition.

[0016] In some embodiments, the online pH analyzer and the automatic acid content regulating valve form a control loop via a controller.

[0017] In some embodiments, the automatic acid content regulating valve is an electric regulating valve or a pneumatic regulating valve with a solenoid valve, which achieves the purpose of automatic adjustment and interlocking of pH value and acid content regulating valve. This further optimizes the precise pH control method of washing condensate in the hydrogen scrubbing tower. It can automatically adjust the opening of the acid content regulating valve according to the monitored pH value, accurately control the pH value of washing condensate between 7 and 9, avoid damage to the equipment due to excessive concentration, and maintain normal operation of the equipment.

[0018] In some embodiments, an online ammonia analyzer is installed on the outlet pipeline at the top of the hydrogen scrubbing tower to control the ammonia content in the wet hydrogen to below 0.05 ppm, thereby preventing excessive ammonia content from affecting the synthesis and production safety of subsequent processes.

[0019] In some embodiments, the dilute acid tank is also equipped with a pipeline flame arrester and an inert gas inlet, the purpose of which is to keep the inside of the tank in an inert state and prevent the leakage of flammable gas from the outside of the empty tank or tower.

[0020] In some embodiments, the bottom of the hydrogen scrubbing tower is equipped with a liquid level sensor, and the output end of the circulating pump is also equipped with a washing condensate discharge outlet. The liquid level of the washing condensate in the hydrogen scrubbing tower is monitored by the liquid level sensor. When the liquid level is too low, washing water is automatically replenished through the washing water inlet of the hydrogen scrubbing tower to meet the timeliness of water replenishment. When the liquid level is too high, the washing condensate discharge outlet can be opened to discharge the excess washing condensate from the system.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This invention provides a wet hydrogen ammonia removal device. It does not modify the internal structure of the hydrogen scrubbing tower and has a simple structure. By adding a dilute acid tank above the hydrogen scrubbing tower and directly connecting it to the tower bottom, the device effectively removes trace amounts of ammonia entrained in the wet hydrogen produced by electrolysis through the circulating system of the hydrogen scrubbing tower. This reduces the frequency of lamp head clogging in the subsequent hydrogen chloride synthesis furnace while lowering the cleaning difficulty and maintenance cost. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the wet hydrogen ammonia removal device in Embodiment 1 of this utility model;

[0025] Figure 2 This is a schematic diagram of the wet hydrogen ammonia removal device in Embodiment 2 of this utility model;

[0026] Figure 3 This is a schematic diagram of the wet hydrogen ammonia removal device in Embodiment 3 of this utility model;

[0027] Figure 4 This is a schematic diagram of the dilute acid tank in Embodiment 4 of this utility model;

[0028] The above figures include the following reference numerals:

[0029] 1-Hydrogen scrubbing tower, 11-Acid inlet, 12-Circulating water outlet, 13-Circulating pump, 14-Cooler, 15-Circulating water inlet, 2-Dilute acid tank, 21-Venturi mixer, 22-Flame arrestor, 23-Inert gas inlet, 31-Automatic acid content regulating valve, 32-Manual valve, 4-Online pH analyzer, 5-Online ammonia content analyzer. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below, along with preferred embodiments. However, it should be understood that these embodiments are merely for more detailed explanation and should not be construed as limiting the utility model in any way, i.e., not limiting the scope of protection of this utility model.

[0031] Unless otherwise defined, the technical terms used in the following embodiments have the same meanings as commonly understood by those skilled in the art to which this invention pertains. Unless otherwise specified, the experimental reagents used in the following embodiments are conventional biochemical reagents; and the experimental methods described are conventional methods.

[0032] Example 1

[0033] A device for removing ammonia from wet hydrogen gas, such as Figure 1As shown, the device includes a hydrogen scrubbing tower 1 and a dilute acid tank 2. The bottom of the hydrogen scrubbing tower 1 is equipped with an acid inlet 11, which is connected to an acid inlet pipe (not marked in the figure) for connecting to the dilute acid tank 2. The dilute acid tank 2 is arranged above the hydrogen scrubbing tower 1, and its arrangement height is determined according to the wet hydrogen pressure to ensure that the dilute hydrochloric acid in the dilute acid tank 2 can flow by gravity into the bottom of the hydrogen scrubbing tower 1 below the washing condensate liquid level. When the dilute hydrochloric acid flows into the hydrogen scrubbing tower 1 by gravity, the liquid column generated acts as a liquid seal, thereby preventing hydrogen from overflowing into the dilute acid tank 2. The bottom of the hydrogen scrubbing tower 1 is also equipped with a circulating water outlet 12, and a circulating pump 13 is installed at the circulating water outlet 12. A cooler 14 is installed at the output end of the circulating pump 13. The circulating water outlet 12 is connected to the circulating pump 13, the cooler 14, and the circulating water inlet 15 in sequence through a circulating pipe (not marked in the figure) to form a circulation loop. The cooler 14 has a cooling water inlet and a cooling water outlet, and the washing condensate flowing through the circulation pipeline is cooled by the flow of cooling water. A liquid level sensor is installed in the bottom of the hydrogen scrubbing tower 1, and a condensate discharge outlet is also provided at the output end of the circulation pump 13. The washing water is added or the washing condensate is discharged according to the monitoring results of the liquid level sensor to ensure the stability of the liquid level in the hydrogen scrubbing tower 1.

[0034] In this embodiment, dilute acid tank 2 contains dilute hydrochloric acid. Selecting suitable dilute hydrochloric acid allows it to be directly introduced into tank 2 for use, ensuring that the dilute acid initially enters the hydrogen scrubbing tower 1 at a low concentration to prevent corrosion of the scrubbing tower due to excessively high initial concentration. The concentration of dilute hydrochloric acid in this embodiment depends on the specific operating conditions. Each system operates differently, requiring different amounts of acid. A mass concentration of 0.8% to 4% achieves the best results. Too low a concentration results in ineffective ammonia removal, while too high a concentration makes the water acidic, corroding equipment and reducing its lifespan.

[0035] In this embodiment, the dilute acid tank 2 and the acid inlet pipeline are both made of fluoropolymer-lined material to prevent corrosion. This embodiment only provides one example, and other materials with corrosion resistance are also within the selection range of the device in this embodiment.

[0036] In this embodiment, the hydrogen scrubbing tower 1 has a built-in scrubbing water inlet located at the bottom of the scrubbing tower for replenishing scrubbing water. In this embodiment, the scrubbing water refers to soft water. This embodiment does not modify the existing scrubbing water inlet of the hydrogen scrubbing tower 1, so the location of the scrubbing water inlet is not marked in the figure of this embodiment.

[0037] The working process of the device in this embodiment is as follows:

[0038] Dilute hydrochloric acid is directly fed into dilute acid tank 2 through a closed pipeline. Dilute acid tank 2 operates at normal temperature and pressure. The switch valve at the bottom of dilute acid tank 2 is opened, allowing the dilute hydrochloric acid to exit from the bottom of the tank. Driven by the positional difference between dilute acid tank 2 and the acid inlet 11 of the hydrogen scrubbing tower 1, the acid flows by gravity through the acid inlet pipeline to the bottom of the hydrogen scrubbing tower 1, mixing below the surface of the washing condensate. The mixed washing condensate is pressurized by the circulation pump 13 and enters the scrubbing tower's own circulation system. After being cooled by the cooler 14, it returns to the top of the tower for circulating spraying. The circulating scrubbing process removes ammonia entrained in the wet hydrogen. The circulating scrubbing process uses a level sensor to monitor the washing condensate level in the hydrogen scrubbing tower 1. When the level is too low, washing water is automatically added through the washing water inlet of the hydrogen scrubbing tower 1. When the level is too high, the condensate outlet can be opened to discharge excess washing condensate from the system.

[0039] Example 2

[0040] Because the pH value of the washing condensate in the hydrogen scrubbing tower 1 is too low, the water is acidic and easily corrodes the scrubbing tower equipment; and the pH value is too high, the water is alkaline, resulting in poor ammonia removal. Therefore, this embodiment further optimizes the device shown in Embodiment 1 by installing an online pH analyzer 4 on the circulation pipeline and an acid content regulating valve group on the acid inlet pipeline. The online pH analyzer 4 can detect the pH value of the washing condensate flowing through the circulation line in real time, and the acid content regulating valve group can adjust the pH value of the washing condensate to maintain the pH value of the washing condensate in the bottom of the hydrogen scrubbing tower 1 at 7-9 to achieve the best scrubbing effect.

[0041] This embodiment provides a device for removing ammonia from wet hydrogen gas, such as... Figure 2 As shown, based on the apparatus of Example 1, an acid content regulating valve group, an online pH analyzer 4, and an online ammonia content analyzer 5 are also provided. The acid content regulating valve group consists of an automatic acid content regulating valve 31 and several manual valves 32, and is installed on the acid inlet pipeline to regulate the amount of dilute acid entering the bottom of the hydrogen scrubbing tower 1. The automatic acid content regulating valve 31 is a pneumatic regulating valve with a solenoid valve. The online pH analyzer 4 is installed on the circulation pipeline between the cooler 14 and the circulating water inlet 15 to detect the pH value of the scrubbing condensate in real time. The online pH analyzer 4 and the pneumatic regulating valve with a solenoid valve are respectively connected to the DCS system controller to form a control loop to achieve automatic control. The online ammonia content analyzer 5 is installed on the gas outlet pipeline at the top of the hydrogen scrubbing tower 1 to detect the ammonia content in the hydrogen at the top of the tower in real time and monitor the ammonia removal effect, controlling the ammonia content in the wet hydrogen to be below 0.5 ppm. This embodiment is only a schematic diagram of a particular embodiment. The dotted lines in the figure represent the formed control loop. The location of the online pH analyzer 4 is not limited and can be set in other locations as needed. As long as it is on the circulation pipeline, it can achieve the purpose of real-time monitoring of the pH value of the circulating washing condensate.

[0042] The controller in the control loop of this utility model is not limited to a DCS system controller, but can also be other controllers that can send control signals, including but not limited to PLC controllers and PAC controllers; the automatic acid content regulating valve 31 of this utility model is not limited to a pneumatic valve with a solenoid valve, but can also be other actuator valves that can execute control signals, including but not limited to electric valves.

[0043] The difference between the working process of the wet hydrogen ammonia removal device provided in this embodiment and that in Embodiment 1 is:

[0044] In this embodiment, during the circulating washing process: the pH value of the washing condensate on the circulating pipeline is maintained between 7 and 9 according to the control and adjustment of the automatic acid content regulating valve 31. When the pH value of the washing condensate on the circulating pipeline is less than 7, the automatic acid content regulating valve 31 can be closed by interlocking the solenoid valve to interrupt the addition of dilute hydrochloric acid and prevent the acid concentration from being too high and corroding the hydrogen washing system. When the pH value of the washing condensate on the circulating pipeline is greater than 9, the automatic acid content regulating valve 31 can be opened by interlocking the solenoid valve to prevent the concentration from being too low and affecting the ammonia removal effect. The washing condensate after adjusting the pH value continues to pass through the hydrogen washing tower 1 circulation system to remove trace amounts of ammonia entrained in the wet hydrogen. The washed hydrogen is discharged from the top of the hydrogen washing tower 1. An online ammonia content analyzer 5 is installed on the outlet pipeline to detect the ammonia content in the hydrogen at the top of the tower in real time and monitor the ammonia removal effect, controlling the ammonia content in the hydrogen to be below 0.05 ppm.

[0045] Example 3

[0046] like Figure 3 As shown, unlike the wet hydrogen ammonia removal device shown in Example 2, the wet hydrogen ammonia removal device shown in this example is equipped with a Venturi mixer 21 on the dilute acid tank 2. The Venturi mixer 21 is connected to the dilute hydrochloric acid inlet and the pure water inlet respectively. Different concentrations of dilute hydrochloric acid are selected according to different acid contents, and they are introduced into the Venturi mixer 21 together with pure water through the dilute hydrochloric acid inlet and the pure water inlet. After being mixed by the Venturi mixer 21, dilute hydrochloric acid with a concentration in the range of 0.8% to 4% is obtained and then sent to the dilute acid tank 2 for storage.

[0047] The working process of the wet hydrogen ammonia removal device provided in this embodiment differs from that in Embodiment 2 in that:

[0048] In this embodiment, during the acid addition process of the dilute acid tank 2: dilute hydrochloric acid and pure water are respectively fed into the Venturi mixer 21 through closed pipes connected to the dilute hydrochloric acid inlet and the pure water inlet. The amount of dilute hydrochloric acid and pure water added is controlled so that the concentration of dilute hydrochloric acid after mixing in the Venturi mixer is 0.8-4%wt, and then mixed in the Venturi mixer and fed into the dilute acid tank 2.

[0049] Example 4

[0050] like Figure 4 As shown, unlike the dilute acid tank 2 shown in Example 3, the dilute acid tank 2 shown in this example is also equipped with a pipeline flame arrester 22 and an inert gas inlet 23. Nitrogen gas is introduced into the dilute acid tank 2 through the inert gas inlet 23, and a fixed nitrogen purging is set in the tank body of the dilute acid tank 2 to keep the tank inside inert and prevent the leakage of combustible gas due to the empty tank or empty tower state.

[0051] It should be noted that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, several simple improvements can be made without departing from the concept of the present invention, and all such improvements should be considered to fall within the scope of protection of the present invention.

Claims

1. A wet hydrogen ammonia removal device, comprising a hydrogen scrubbing tower (1), characterized in that, It also includes a dilute acid tank (2), which is arranged above the hydrogen scrubbing tower (1) according to the liquid level difference. The bottom of the hydrogen scrubbing tower (1) is provided with an acid inlet (11), and the dilute acid tank (2) is connected to the acid inlet (11) through an acid inlet pipeline. The circulating water outlet (12) of the hydrogen scrubbing tower (1) is provided with a circulating pump (13), and the circulating water outlet (12), the circulating pump (13) and the circulating water inlet (15) are connected through a circulating pipeline.

2. The wet hydrogen ammonia removal device according to claim 1, characterized in that, The dilute acid tank (2) is equipped with a Venturi mixer (21), which is connected to the dilute hydrochloric acid inlet and the pure water inlet respectively.

3. The wet hydrogen ammonia removal device according to claim 1, characterized in that, A cooler (14) is provided on the circulation pipeline, and the cooler (14) is located at the output end of the circulation pump (13).

4. The wet hydrogen ammonia removal device according to claim 3, characterized in that, An online pH analyzer (4) is installed on the circulation pipeline.

5. The wet hydrogen ammonia removal device according to claim 4, characterized in that, The online pH analyzer (4) is located at the output end of the cooler (14).

6. The wet hydrogen ammonia removal device according to claim 4 or 5, characterized in that, The acid inlet pipeline is equipped with an acid content regulating valve group, which includes at least one automatic acid content regulating valve (31) and several manual valves (32).

7. The wet hydrogen ammonia removal device according to claim 6, characterized in that, The automatic acid content regulating valve (31) and the online pH analyzer (4) form a control loop through a controller.

8. The wet hydrogen ammonia removal device according to claim 7, characterized in that, The acid content automatic regulating valve (31) is an electric regulating valve or a pneumatic regulating valve with a solenoid valve.

9. The wet hydrogen ammonia removal device according to claim 1 or 2, characterized in that, An online ammonia content analyzer (5) is installed on the gas outlet pipe at the top of the hydrogen scrubbing tower (1).

10. The wet hydrogen ammonia removal device according to claim 1 or 2, characterized in that, The dilute acid tank (2) is equipped with a pipeline flame arrester (22) and an inert gas inlet (23).

Images