Ammonia escape treatment device

Abstract

The utility model provides an ammonia escape treatment device which comprises a bottom plate covering a charging hole of an ammonia metering box, and an ammonia escape treatment unit which is arranged on the bottom plate and is provided with a sealed cavity, and a water seal tank is arranged in the ammonia escape treatment unit; a cavity of the ammonia escape unit is arranged in the ammonia metering box, a communication channel is arranged between the cavity of the ammonia escape unit and the ammonia metering box, the water seal tank is in gas communication with the communication channel and is isolated by water, so that a solution in the water seal tank is prevented from entering the ammonia metering box through the communication channel, and the ammonia escape treatment unit is provided with a water inlet and a water outlet. According to the utility model, through the tight connection of the bottom plate and the charging hole and the double-sealing design of the water seal tank, the sealing performance of the ammonia metering box is obviously improved, ammonia gas is effectively prevented from escaping, and the working environment is improved; the diffusion of ammonia gas in the air is reduced, the health risk caused by long-term exposure of operators in a high-concentration ammonia gas environment is reduced, and the safety of the operators is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power auxiliary equipment, and more specifically, to an ammonia escape treatment device. Background Art

[0002] The secondary circuit dosing system of a nuclear power plant is used to adjust the quality of the secondary circuit water, prevent corrosion of the thermal system and the formation of deposits in the steam generator. At present, almost all nuclear power plants use reductive full-volatilization treatment, that is, the treatment of adding ammonia and hydrazine to the feed water. Adding ammonia to the feed water increases the pH value of the feed water and reduces the corrosion of the feed water system. The ammonia solution tank is used to store 15% ammonia water. Ammonia water is extremely volatile. Ammonia mist diffuses into the air through the top loading port, resulting in excessive ammonia content in the environment. Ammonia is irritating. Absorption can cause a variety of respiratory symptoms and damage organs such as the myocardium and lungs, which is not conducive to the health of operators. The original design of the current ammonia metering box has no sealing device and only relies on a metal cover for covering, resulting in long-term excessive ammonia content in the environment of the room. The use of waterproof tape for sealing is not effective, and ammonia will accelerate the aging of rubber materials. Temporary sealing devices need to be checked and replaced regularly. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, an ammonia escape treatment device is provided to solve the problem that the ammonia metering box of the secondary circuit dosing system of a nuclear power plant (or other companies using ammonia metering boxes) is not tightly sealed, resulting in the ammonia in the affiliated factory building not meeting the standards required for occupational disease prevention and control, and to solve the pain points and difficulties of the physical and mental health of the staff affected by excessive ammonia concentration.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] An ammonia escape treatment device comprises a bottom plate covering a charging port of an ammonia metering box, and an ammonia escape treatment unit arranged on the bottom plate and having a sealed chamber, wherein a water seal groove is arranged in the ammonia escape treatment unit, and the chamber of the ammonia escape unit is communicated with the ammonia metering box, and the ammonia escape treatment unit is provided with a water inlet and a drain outlet.

[0006] Furthermore, preferably, the ammonia escape treatment unit includes an inner ring arranged on a bottom plate and an outer ring arranged outside the inner ring, the outer ring is arranged at a height higher than the inner ring, the inner ring and the outer ring define a water seal groove, and air holes are opened on the bottom plate enclosed by the inner ring.

[0007] Furthermore, it is preferred that the water inlet and the water outlet are opened on the outer ring.

[0008] Furthermore, it is preferred that the drain port is arranged at the bottom of the outer ring.

[0009] Furthermore, it is preferred that an overflow port is provided on the ammonia escape treatment unit, and the installation height of the overflow port is lower than that of the inner ring.

[0010] Furthermore, it is preferred that an overflow valve is provided on the connecting pipe of the overflow port.

[0011] Furthermore, it is preferred that the ammonia escape treatment unit further includes a cover plate covering the outer ring to seal the water seal groove.

[0012] Furthermore, it is preferred that an inlet valve is provided on the connecting pipe of the water inlet.

[0013] Furthermore, it is preferred that an outlet valve is provided on the connecting pipe of the drain port.

[0014] Furthermore, it is preferred that the connection mode between the bottom plate and the loading port of the ammonia metering tank is welding or sealed connection through a soft gasket.

[0015] The ammonia escape treatment device of the present utility model has at least the following effects:

[0016] 1. Significantly improve the sealing performance: Through the tight connection between the bottom plate and the loading port and the double-sealing design of the water seal groove, the sealing performance of the ammonia metering tank is significantly improved, effectively preventing ammonia escape and improving the working environment.

[0017] 2. Reduce health risks: Reduce the diffusion of ammonia in the air, reduce the health risks caused by operators' long-term exposure to high-concentration ammonia environment, and ensure personnel safety.

[0018] 3. Improve system stability: Reduce the influence of ammonia escape on the ammonia metering tank and the entire secondary loop dosing system, improve the stability and reliability of the system, and extend the service life of the equipment.

[0019] 4. Facilitate maintenance and management: The device design takes into account easy maintenance, such as detachable cover plates, easily adjustable valve systems, etc., reducing the maintenance difficulty and cost, and improving the management efficiency.

[0020] 5. Environmental protection and energy saving: By effectively capturing and treating the escaped ammonia, environmental pollution is reduced, meeting the environmental protection concept of green and low-carbon. Description of the Drawings

[0021] Figure 1 is the front view of the ammonia escape treatment device of the present utility model;

[0022] Figure 2 is Figure 1 the explosion diagram of

[0023] Figure 3 is Figure 1 the sectional view of Detailed implementation manners

[0024] To further elaborate on the technical means and technical effects of the present utility model, the following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0025] The present utility model aims to provide an efficient and reliable ammonia escape treatment device to solve the environmental problems and safety hazards caused by ammonia escape at the loading port of the ammonia metering tank in the secondary dosing system of nuclear power plants. The device effectively captures and treats the escaped ammonia through an innovative sealing structure and water seal technology, ensuring the safety of the operating environment, reducing the harm to human health, and improving the overall operating efficiency of the system.

[0026] As Figures 1 - 3 shown, the present utility model provides an ammonia escape treatment device, including a bottom plate 10 covering the loading port of the ammonia metering tank, and an ammonia escape treatment unit 20 provided on the bottom plate 10 and having a sealed chamber. A water seal groove 21 is provided in the ammonia escape treatment unit 20, and a communication channel is provided between the chamber of the ammonia escape unit and the ammonia metering tank so that ammonia can enter the interior of the ammonia treatment unit through the communication channel. The water seal groove 21 is in gas communication with the communication channel and is separated by water, which means that after escaping into the sealed ammonia escape treatment unit 20, it can enter the water seal groove 21 and be absorbed and treated, and the meaning of water separation is to prevent the solution in the water seal groove 21 from entering the ammonia metering tank through the communication channel. An inlet 22 and a drain outlet 23 are provided on the ammonia escape treatment unit 20. SED demineralized water is taken in through the inlet 22 and ammonia water is discharged through the drain outlet 23. The ammonia escape treatment unit 20 is provided on the bottom plate 10, forming a sealed chamber inside, and is connected to the ammonia metering tank. The ammonia escape treatment unit 20 is provided with a unique water seal groove 21 structure, which effectively captures and dissolves the escaped ammonia through the physical blocking effect of water, reducing the possibility of its diffusion into the air.

[0027] The bottom plate 10 is designed to tightly cover the loading port of the ammonia metering tank to ensure basic sealing. The material of the bottom plate 10 is selected as a corrosion-resistant and high-strength metal material. Then, the bottom plate 10 is tightly connected to the loading port by welding to ensure no gap and provide permanent sealing. If a soft gasket is used for sealing connection, it is necessary to ensure that the gasket material is resistant to ammonia corrosion, and the gasket should be pressed tightly during installation without leakage, which is convenient for replacement and maintenance. Both of the above can effectively prevent ammonia from leaking directly to the outside.

[0028] In a specific embodiment, the ammonia escape treatment unit 20 includes an inner ring 212 disposed on the bottom plate 10 and an outer ring 211 disposed outside the inner ring 212. Both the inner ring 212 and the outer ring 211 are made of corrosion-resistant metal materials. The installation height of the outer ring 211 is higher than that of the inner ring 212. The inner ring 212 and the outer ring 211 define a water seal groove 21. Here, the formation of the water seal groove 21 can be jointly defined by the inner ring 212, the outer ring 211, and the bottom plate 10 to form the water seal groove 21, or it can be jointly defined by the inner ring 212, the outer ring 211, and a connecting portion connected to the bottoms of the outer ring 211 of the inner ring 212 to form the water seal groove 21. A vent hole 11 is provided on the bottom plate 10 enclosed by the inner ring 212, and the aperture size needs to be adjusted according to the ammonia escape amount and the water seal effect. That is to say, a U-shaped groove is formed within the ammonia escape unit, and a vent hole 11 communicating with the inside of the ammonia metering tank is reserved in the middle of the U-shaped groove. The ammonia overflowing from the inside of the ammonia metering tank can enter the ammonia escape unit through the vent hole 11 and then dissolve in the water between the inner ring 212 and the outer ring 211. The water between the inner ring 212 and the outer ring 211 is blocked by the inner ring 212 to prevent the water from entering the ammonia metering tank through the vent hole 11. Further, an adjustable-aperture vent hole 11 structure is adopted to flexibly adjust the aperture size according to the change of the ammonia escape amount to achieve the best water seal effect.

[0029] Further, preferably, the water inlet 22 and the drain outlet 23 are provided on the outer ring 211. SED 除盐水取水 Water can enter the water seal groove 21 defined by the outer ring 211 and the outer ring 211 through the water inlet 22, and the treated ammonia water can be discharged through the drain outlet 23. To drain the water completely, preferably, the drain outlet 23 is provided at the bottom of the outer ring 211.

[0030] In a preferred embodiment, to prevent the water in the water seal groove 21 from overflowing when draining water, an overflow port 24 is further provided on the ammonia escape treatment unit 20. The installation height of the overflow port 24 is slightly lower than that of the inner ring 212. In this way, it is possible to directly judge whether the water level in the water seal groove 21 is appropriate by observing whether there is water overflowing from the overflow port 24. Of course, a suitable window can also be provided on the outer ring 211. Further, preferably, an overflow valve 27 is provided on the connecting pipe of the overflow port 24 to facilitate the control of the overflow port 24.

[0031] In a specific embodiment, a water inlet valve 25, an outlet valve, and an overflow valve 27 are respectively installed on the connecting pipes of the water inlet 22, the drain outlet 23, and the overflow port 24, and debugging is carried out to ensure that the valve switches are flexible and the sealing performance is good.

[0032] In a specific embodiment, the ammonia escape treatment unit 20 further includes a cover plate 30 covering the outer ring 211. The cover plate 30 and the edge of the outer ring 211 are fastened by bolts or buckles, etc., so that the water seal groove 21 is sealed, preventing the escaped ammonia from contacting the outside air and ensuring the treatment effect of the water seal solution on ammonia. Further, preferably, the cover plate 30 is made of a transparent material, which is convenient for observing the situation inside the water seal groove 21 without frequently opening the cover plate 30. At the same time, a maintenance port and a ventilation hole are provided on the cover plate 30 for easy maintenance and ventilation.

[0033] In a specific embodiment, a water quality monitoring sensor is provided in the water seal groove 21 to monitor the water quality change in real time. Once the water quality deteriorates or the ammonia concentration exceeds the standard, an alarm is immediately issued and an automatic drainage and water replacement program is started.

[0034] In a specific embodiment, an automated control system is introduced, and the valve control system is combined with the automated control system to achieve remote monitoring and automatic adjustment of the inlet and outlet valves, the overflow valve 27, and the water quality monitoring sensor, improving the intelligent level and operating efficiency of the device.

[0035] The ammonia escape treatment device of the present utility model has at least the following effects:

[0036] 1. Significantly improve the sealing performance: Through the tight connection between the bottom plate and the loading port and the double-sealing design of the water seal groove, the sealing performance of the ammonia metering tank is significantly improved, effectively preventing ammonia escape and improving the working environment.

[0037] 2. Reduce health risks: Reduce the diffusion of ammonia in the air, reducing the health risks of operators caused by long-term exposure to high-concentration ammonia environments and ensuring personnel safety.

[0038] 3. Improve system stability: Reduce the impact of ammonia escape on the ammonia metering tank and the entire secondary loop dosing system, improving the stability and reliability of the system and extending the service life of the equipment.

[0039] 4. Facilitate maintenance and management: The device design takes into account easy maintainability, such as detachable cover plates, easily adjustable valve systems, etc., reducing the maintenance difficulty and cost and improving the management efficiency.

[0040] 5. Environmental protection and energy saving: By effectively capturing and treating the escaped ammonia, environmental pollution is reduced, meeting the environmental protection concept of green and low-carbon.

[0041] The above embodiments are only for illustrating the technical concept and features of the present utility model, and their purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and cannot limit the protection scope of the present utility model. All equivalent changes and modifications made to the scope of the claims of the present utility model shall fall within the scope covered by the claims of the present utility model.

Claims

1. An ammonia escape treatment device, characterized in that: It includes a bottom plate covering the charging port of an ammonia metering box, and an ammonia escape treatment unit arranged on the bottom plate and having a sealed chamber, wherein a water seal groove is arranged in the ammonia escape treatment unit, and a connecting channel is arranged between the chamber of the ammonia escape unit and the ammonia metering box, the water seal groove is gas-connected with the connecting channel and water-isolated to prevent the solution in the water seal groove from entering the ammonia metering box through the connecting channel, and the ammonia escape treatment unit is provided with a water inlet and a drain.

2. The ammonia escape treatment device according to claim 1, characterized in that: The ammonia escape treatment unit includes an inner ring arranged on a bottom plate and an outer ring arranged outside the inner ring. The outer ring is arranged at a height higher than the inner ring. The inner ring and the outer ring define a water seal groove. An air hole connected to the inside of the ammonia metering box is opened on the bottom plate enclosed by the inner ring.

3. The ammonia escape treatment device according to claim 2, characterized in that: The water inlet and the water outlet are arranged on the outer ring.

4. The ammonia escape treatment device according to claim 3, characterized in that: The drain port is arranged at the bottom of the outer ring.

5. The ammonia escape treatment device according to claim 2, characterized in that: The ammonia escape treatment unit is also provided with an overflow port, and the setting height of the overflow port is lower than the setting height of the inner ring.

6. The ammonia escape treatment device according to claim 5, characterized in that: An overflow valve is arranged on the connecting pipe of the overflow outlet.

7. The ammonia escape treatment device according to claim 2, characterized in that: The ammonia escape treatment unit also includes a cover plate covering the outer ring so that the water seal groove is sealed.

8. The ammonia escape treatment device according to claim 1, characterized in that: The connecting pipe of the water inlet is provided with a water inlet valve, and the connecting pipe of the water outlet is provided with a water outlet valve.

9. The ammonia escape treatment device according to claim 1, characterized in that: A water quality monitoring sensor is arranged in the water seal groove.

10. The ammonia escape treatment device according to claim 1, characterized in that: The bottom plate is connected to the charging port of the ammonia metering box by welding or by sealing with a soft gasket.

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