Ammonia water preparation device

Abstract

The utility model provides an ammonia water preparation device, which is used for safely and efficiently preparing ammonia water on the site of a power plant, and comprises a gas ammonia dissolving tank connected with a demineralized water pipe and a gas ammonia conveying pipe, a stirring device, a liquid level meter and a conductivity detector arranged in the gas ammonia dissolving tank, a first switch valve arranged on the demineralized water pipe and a first flow meter arranged on the first switch valve, and a second switch valve arranged on the second flow meter, a second switch valve, a pressure reducing valve and a second flow meter are sequentially arranged on the gaseous ammonia conveying pipe; the ammonia water metering box is connected with an ammonia water outlet pipe at the bottom of the gas ammonia dissolving box through a connecting pipe, and a third switch valve is arranged on the connecting pipe; the gas ammonia pre-wetting assembly is composed of a steam generator and a premixing box, a steam outlet of the steam generator and one end of a gas ammonia conveying pipe are both connected with an inlet of the premixing box, and one end of an outlet of the premixing box is connected with the interior of the gas ammonia dissolving box. The ammonia gas pre-wetting assembly is arranged to carry out pre-wetting treatment on the ammonia gas, so that the efficiency of the subsequent dissolving process can be remarkably improved, the time required for completely dissolving the ammonia gas is shortened, and the production efficiency of the device is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ammonia water production equipment, and in particular to an ammonia water preparation device. Background Technology

[0002] Currently, ammonia treatment in power plant water and steam systems commonly uses centrally prepared ammonia solutions purchased externally. These solutions, typically at a concentration of 20%-28%, are transported to the site in IBC containers and then repackaged into smaller containers for routine dosing. This approach presents several technical drawbacks and safety hazards: First, ammonia is highly irritating and corrosive, and easily volatilizes and releases ammonia gas during transportation, storage, and repackaging, causing serious harm to the respiratory system, eyes, and skin of operators. Second, each repackaging operation increases the risk of ammonia leakage and personnel contact, with large ammonia release rates at high temperatures. Third, storing large quantities of high-concentration ammonia increases the difficulty of safety management; a leak would cause serious harm to the surrounding environment and personnel. Fourth, the concentration of purchased ammonia is unstable during long-term storage, affecting the accuracy of water chemical treatment. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an ammonia water preparation device that uses ammonia gas in the boiler gas supply ammonia pipeline to safely and efficiently prepare ammonia water on the power plant site.

[0004] To achieve the above objectives, the following technical solution is adopted:

[0005] An ammonia preparation apparatus, characterized in that it comprises:

[0006] A gaseous ammonia dissolving tank is connected to a demineralized water pipe and a gaseous ammonia delivery pipe. Inside the tank, there is a stirring device, a level gauge, and a conductivity meter. The demineralized water pipe is equipped with a first switching valve and a first flow meter. The gaseous ammonia delivery pipe is equipped with a second switching valve, a pressure reducing valve, and a second flow meter in sequence.

[0007] The ammonia metering tank is connected to the ammonia outlet pipe at the bottom of the gaseous ammonia dissolving tank via a connecting pipe, and a third switch valve is installed on the connecting pipe.

[0008] In addition, the ammonia pre-humidification component consists of a steam generator and a premixing tank. The steam outlet of the steam generator and one end of the ammonia delivery pipe are both connected to the inlet of the premixing tank, and one end of the outlet of the premixing tank is connected to the inside of the ammonia dissolving tank.

[0009] Furthermore, the premixing box is equipped with a spiral channel inside. One end of the spiral channel is connected to the steam outlet of the steam generator and the ammonia delivery pipe, and the other end is equipped with a humidity sensor.

[0010] Furthermore, an ammonia concentration detector and a spray assembly are installed above the inside of the ammonia metering tank.

[0011] Furthermore, the spray assembly includes a spray pipe and multiple sets of nozzles disposed on the spray pipe. One end of the spray pipe is connected to a demineralized water pipe and is equipped with a fourth switch valve.

[0012] Furthermore, it also includes an ammonia mist absorber, the inlet of which is connected to the upper part of the gaseous ammonia dissolving tank and the ammonia water metering tank.

[0013] Furthermore, a disperser is provided at the bottom of the ammonia dissolving box. The disperser has a cavity inside and multiple micropores connected to the cavity on its upper surface. One end of the outlet of the premixing box is connected to the cavity inside the disperser.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By setting up a gaseous ammonia pre-humidification components to pre-humidify the ammonia gas in the gas supply ammonia pipe from the boiler, the pre-humidified ammonia gas is more soluble in water than dry ammonia gas, which can significantly improve the efficiency of the subsequent dissolution process, shorten the time required for complete dissolution of ammonia gas, and improve the production efficiency of the equipment.

[0016] 2. The premixing box in the ammonia prehumidification component is equipped with a spiral channel, which can prolong the contact time between ammonia and water vapor and improve the ammonia prehumidification effect.

[0017] 3. A disperser is installed at the bottom of the ammonia dissolving tank. The pre-wetted ammonia and water vapor mixture can be dispersed into a large number of tiny bubbles through the micropores on the disperser, which increases the contact area with the demineralized water, thereby further improving the ammonia dissolving efficiency. It can also make the ammonia evenly distributed, avoiding excessively high local ammonia concentration leading to insufficient dissolution or excessive local heat release leading to ammonia escape.

[0018] 4. The ammonia metering tank is equipped with an ammonia concentration detector and a spray system. When the ammonia concentration is detected to be too high, demineralized water can be sprayed through the spray system to further dissolve the ammonia.

[0019] 5. By installing an ammonia mist absorber, when the ammonia mist concentration in the upper part of the ammonia dissolving tank and ammonia water metering tank is too high, the ammonia mist will be discharged and absorbed to prevent it from escaping into the external working environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present utility model.

[0021] Figure 2 Partial cross-sectional view of the diffuser

[0022] Wherein: 1-Ammonia dissolving tank, 2-Demineralized water pipe, 3-Ammonia delivery pipe, 4-Ammonia metering tank, 5-Steam generator, 6-Premixing tank, 7-Humidity sensor, 8-First switch valve, 9-First flow meter, 10-Second switch valve, 11-Pressure reducing valve, 12-Second flow meter, 13-Stirring device, 14-Disperser, 15-Cavity, 16-Micropore, 17-Third switch valve, 18-Ammonia concentration detector, 19-Spray pipe, 20-Spray head, 21-Fourth switch valve, 22-Ammonia mist absorber, 23-Level gauge, 24-Conductivity detector, 25-Fifth switch valve, 26-Sixth switch valve, 27-Seventh switch valve. Detailed Implementation

[0023] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0024] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the view direction or positional relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0025] like Figures 1-2 The ammonia preparation device shown includes a gaseous ammonia dissolving tank 1, an ammonia metering tank 4, and a gaseous ammonia prehumidification component.

[0026] Specifically, the ammonia dissolving tank 1 is connected to a demineralized water pipe 2 and an ammonia delivery pipe 3, and is equipped with a stirring device 13 and a disperser 14 at the bottom. The demineralized water pipe 2 is connected to the upper part of the ammonia dissolving tank 1, and is equipped with a first switching valve 8 and a first flow meter 9. The ammonia delivery pipe 3 is equipped with a second switching valve 10, a pressure reducing valve 11, and a second flow meter 12. The ammonia pre-humidification assembly is connected between the ammonia delivery pipe 3 and the bottom of the ammonia dissolving tank 1, and uses ammonia pre-humidification... The wet assembly can pre-humidify the ammonia gas coming from the boiler ammonia gas channel. The ammonia pre-humidification assembly mixes the ammonia gas with water vapor before it enters the ammonia dissolution tank 1, thereby improving the ammonia dissolution efficiency. The stirring device 13 consists of a drive motor and a stirring rod connected to the output shaft of the stirring motor. The stirring device 13 can stir the demineralized water and ammonia gas inside the ammonia dissolution tank 1, thereby improving the dissolution efficiency. In addition, a level gauge 23 is installed on one side of the ammonia dissolution tank 1, and a conductivity meter 24 is installed inside.

[0027] The ammonia pre-humidification assembly comprises a steam generator 5 and a premixing tank 6. In this embodiment, the steam generator 5 can be an electric steam generator. The premixing tank 6 is a shell with an internal spiral channel. The premixing tank 6 is provided with a steam inlet and an ammonia inlet, which are respectively connected to the steam outlet of the steam generator 5 and the ammonia delivery pipe 3. Both the steam inlet and the ammonia inlet of the premixing tank 6 are connected to one end of the spiral channel. The other end of the spiral channel is connected to the disperser 14 inside the ammonia dissolving tank 1 through a pipe. The spiral channel design increases the contact time and contact area between the ammonia and the steam, promoting thorough mixing. Furthermore, a humidity sensor 7 and a sixth switching valve 26 are provided at the outlet end of the spiral channel of the premixing tank 6. The humidity sensor 7 can monitor the humidity of the mixed gas to ensure that the ammonia is fully pre-humidified.

[0028] Disperser 14 Figure 2 As shown, the overall structure is a circular plate-shaped shell with an internal cavity 15. The lower end has a connection port communicating with the cavity 15, and the upper end has multiple sets of micropores 16 communicating with the interior of the cavity 15. After passing through the ammonia pre-humidification component, the ammonia gas enters the demineralized water in the ammonia dissolution tank 1 in the form of small bubbles through the disperser 14, which can increase the gas-liquid contact area and further improve the dissolution efficiency of ammonia.

[0029] The ammonia metering tank 4 is connected to the ammonia outlet pipe at the bottom of the ammonia dissolving tank 1 via a connecting pipe. A third switch valve 17 is installed on the connecting pipe. An ammonia concentration detector 18 and a spray assembly are installed in the upper part of the ammonia metering tank 4. The spray pipe 19 is connected to the demineralized water pipe 2 and is equipped with a fourth switch valve 21. The spray assembly includes the spray pipe 19 and multiple nozzles 20 located in the upper part of the ammonia metering tank 4 and connected to the spray pipe 19. Demineralized water can be sprayed through the spray pipe 19 and the nozzles 20 to absorb the ammonia inside the ammonia metering tank 4. A seventh switch valve 27 is installed on the drain pipe at the bottom of the ammonia metering tank 4. A level gauge (not shown in the figure) is also installed on the ammonia metering tank 4. When the liquid level inside the ammonia metering tank 4 reaches a preset height, the corresponding third switch valve 17 is closed. When ammonia needs to be used from a certain ammonia metering tank 4, the seventh switch valve 27 is opened. The ammonia metering tank 4 serves as a buffer and metering unit.

[0030] In addition, this device also includes an ammonia mist absorber 22, which contains an acidic absorbent liquid. The upper parts of the gaseous ammonia dissolving tank 1 and the ammonia water metering tank 4 are connected to the air inlet of the ammonia mist absorber 22 through pipes. The ammonia mist absorber 22 absorbs and treats the ammonia mist in the gaseous ammonia dissolving tank 1 and the ammonia water metering tank 4 to prevent the ammonia mist from escaping into the working environment.

[0031] The principle of ammonia preparation using this device is as follows:

[0032] First, the first switch valve 8 is opened, and the demineralized water is controlled by the first flow meter 9 to enter the ammonia dissolving tank 1 at an appropriate flow rate. The steam generator 5 is started to generate steam, and simultaneously the second switch valve 10 is opened. The ammonia gas in the boiler's ammonia supply pipeline is reduced to 0.05-0.1 MPa by the pressure reducing valve 11, and then the flow rate is controlled by the second flow meter 12 to enter the premixing tank 6. In the premixing tank 6, the ammonia gas and steam are fully mixed to form pre-humidified ammonia gas. The humidity of the mixed gas is monitored by the humidity sensor 7. The pre-humidified ammonia gas enters the ammonia dissolving tank 1 in the form of small bubbles through the micropores 16 of the disperser 14. The ammonia is dissolved in the ammonia dissolution tank 1 and mixed with demineralized water. The stirring action of the stirring device 13 promotes the dissolution of gaseous ammonia in the water, forming an ammonia solution. When the conductivity of the ammonia solution is monitored by the conductivity detector 24 and reaches the preset value, the first switch valve 8, the second switch valve 10, and the sixth switch valve 26 are closed, and the third switch valve 17 is opened to deliver the ammonia solution to the ammonia metering tank 4. The ammonia concentration detector 18 monitors the ammonia concentration inside the ammonia metering tank 4 in real time, and if necessary, the spray assembly is activated to reduce the ammonia concentration. The ammonia mist absorber 22 continuously absorbs and treats the ammonia escaping from the gaseous ammonia dissolution tank 1 and the ammonia metering tank 4.

[0033] The ammonia preparation device provided by this utility model can safely and efficiently prepare ammonia on-site at power plants, avoiding the health hazards and safety risks to personnel caused by the repackaging and use of purchased ammonia.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An ammonia water preparation apparatus, characterized in that, The utility model relates to a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water.

2. The ammonia water preparation apparatus according to claim 1, wherein The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water.

3. The ammonia water preparation apparatus according to claim 1, wherein The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water.

4. The ammonia water preparation apparatus according to claim 3, wherein The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water.

5. The ammonia water preparation apparatus according to claim 1, wherein The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water.

6. The ammonia water preparation apparatus according to claim 1, wherein The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia gas dissolving box, ammonia water metering box and ammonia gas pre-wetting assembly, which are used for the preparation of ammonia water. The utility model discloses a kind of ammonia

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