Ammonia water atomization device

Abstract

The embodiment of the utility model provides an ammonia water atomization device. The ammonia water atomization device comprises an ammonia water atomization mechanism, a dilution fan, a heating mechanism and a mixer, the ammonia water atomizing mechanism comprises an ammonia water tank and an ultrasonic atomizer, the ultrasonic atomizer is arranged in the ammonia water tank, and the ultrasonic atomizer is configured to atomize ammonia water in the ammonia water tank to form ammonia water mist; an air outlet of the dilution fan communicates with an inlet of the heating mechanism, and an outlet of the heating mechanism communicates with a first air inlet of the mixer, so that dilution air formed by the dilution fan is input into the mixer after being heated by the heating mechanism; a second air inlet of the mixer is communicated with the ammonia water tank, the ammonia water mist flows into the mixer through the second air inlet, and the mixer is configured to mix the ammonia water mist and the heated dilution air so as to be evaporated into ammonia gas and water vapor; wherein the inlet end of the second gas inlet of the mixer is arranged above the preset liquid level of the ammonia water tank. By means of the arrangement of the embodiment of the invention, the ammonia water atomization device capable of achieving small flow is provided.

Description

Technical Field

[0001] This application relates to the field of ammonia atomization technology, and more particularly to an ammonia atomization device. Background Technology

[0002] With the upgrading of air pollution treatment and the demand for denitrification in gas-fired boilers, pyrolysis furnaces, and kilns, it has been put on the agenda. A large number of pollution sources with small flue gas volumes or low initial concentrations of nitrogen oxides also need to be denitrified, mainly using SCR (Selective Catalytic Reduction) denitrification technology. SCR denitrification technology is currently the most mature and widely used denitrification technology.

[0003] In related technologies, in the SCR denitrification process, ammonia water is used as a reducing agent. Ammonia gas after evaporation is usually injected into the SCR reactor through an ammonia injection system to carry out the reaction.

[0004] However, the SCR denitrification process requires very little ammonia. In related technologies, the injection flow rate into the SCR reactor is usually between 2L / h and 3L / h. The large ammonia injection flow rate affects the denitrification efficiency of the denitrification unit. Utility Model Content

[0005] Therefore, this application provides an ammonia atomization device to solve the technical problem in the related art where the injection flow rate into the SCR reactor is usually between 2L / h and 3L / h, and the large ammonia injection flow rate affects the denitrification efficiency of the denitrification device.

[0006] This application provides an ammonia atomizing device, including: an ammonia atomizing mechanism, a dilution fan, a heating mechanism, and a mixer;

[0007] The ammonia atomizing mechanism includes an ammonia tank and an ultrasonic atomizer. The ammonia tank is used to contain ammonia, and the ultrasonic atomizer is set inside the ammonia tank. The ultrasonic atomizer is configured to atomize the ammonia in the ammonia tank to form ammonia mist.

[0008] The outlet of the dilution fan is connected to the inlet of the heating mechanism, and the outlet of the heating mechanism is connected to the first air inlet of the mixer, so that the dilution air generated by the dilution fan is heated by the heating mechanism and then input into the mixer.

[0009] The second air inlet of the mixer is connected to the ammonia water tank. Ammonia water mist flows into the mixer through the second air inlet. The mixer is configured to mix the ammonia water mist and the heated dilution air to evaporate into ammonia gas and water vapor. The inlet end of the second air inlet of the mixer is located above the preset liquid level of the ammonia water tank.

[0010] The mixer is configured as a Venturi mixer, which includes a nozzle, an intake chamber, and a mixing chamber that are interconnected. The inner diameter of the nozzle is smaller than the inner diameter of the intake chamber and the mixing chamber.

[0011] The nozzle has a first air inlet, the suction chamber has a second air inlet, and the ammonia mist and heated dilution air are mixed in the mixing chamber.

[0012] In one feasible implementation, the outlet of the dilution fan is also connected to the ammonia water tank to drive the ammonia water mist into the mixer; wherein the air inlet of the ammonia water tank is located above the preset liquid level of the ammonia water tank.

[0013] In one feasible implementation, the ammonia tank is equipped with an inlet pipe that connects the ammonia tank and the ammonia storage tank.

[0014] The ammonia atomization device also includes a level sensor, a control valve, and a controller;

[0015] A liquid level sensor is installed inside the ammonia tank to monitor the liquid level in the ammonia tank, and a control valve is installed on the inlet pipe to control the input of ammonia water from the ammonia storage tank into the ammonia tank.

[0016] Both the level sensor and the control valve are connected to the controller. The controller is set with a preset level value. The level sensor outputs the level signal of the ammonia tank to the controller. When the level signal value is greater than the preset level value, the controller outputs a shut-off signal to the control valve.

[0017] In one feasible implementation, multiple ultrasonic atomizers are evenly arranged, and all of the multiple ultrasonic atomizers are positioned below a preset liquid level.

[0018] In one feasible implementation, the heating mechanism includes a housing and an electric heating wire;

[0019] The housing has a heating chamber that connects the outlet of the dilution fan and the first inlet of the mixer. An electric heating wire is installed in the heating chamber to heat the dilution air generated by the dilution fan.

[0020] In one feasible implementation, the ammonia tank is provided with a rinsing port for rinsing the ammonia tank, and the ammonia tank is also provided with a drain port for discharging wastewater.

[0021] This application provides an ammonia atomizing device. In this embodiment, by using an ultrasonic atomizer, ammonia water can be atomized into tiny mist particles (i.e., ammonia mist) of 1μm to 5μm. The ammonia mist flows into a mixer. Simultaneously, dilution air generated by a dilution fan, heated by a heating mechanism, also enters the mixer. Inside the mixer, the ammonia mist and the heated dilution air are uniformly mixed, thereby evaporating the ammonia mist. Firstly, this dilutes the ammonia mist to a safe concentration; secondly, it maintains a certain temperature for the ammonia gas, preventing liquefaction; and thirdly, it further vaporizes and dilutes the ammonia mist to achieve the user's desired low flow rate. This application provides an ammonia atomizing device capable of achieving a low flow rate. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of an ammonia atomizing device provided in one embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100 - Ammonia atomizing mechanism; 200 - Dilution fan; 300 - Heating mechanism; 400 - Mixer;

[0026] 110 - Control Panel;

[0027] 210 - Connecting pipe; 220 - Regulating valve. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0029] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, 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 of this application. In this application, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two entities connected are not linked by an intermediate structure, but are simply connected to form a whole. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0032] In this application, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0033] With the upgrading of air pollution treatment and the demand for denitrification in gas-fired boilers, pyrolysis furnaces, and kilns, it has been put on the agenda. A large number of pollution sources with small flue gas volumes or low initial concentrations of nitrogen oxides also need to be denitrified, mainly using SCR (Selective Catalytic Reduction) denitrification technology. SCR denitrification technology is currently the most mature and widely used denitrification technology.

[0034] In related technologies, in the SCR denitrification process, ammonia water is used as a reducing agent. Ammonia gas after evaporation is usually injected into the SCR reactor through an ammonia injection system to carry out the reaction.

[0035] However, the SCR denitrification process requires very little ammonia. In related technologies, the injection flow rate into the SCR reactor is usually between 2L / h and 3L / h. The large ammonia injection flow rate affects the denitrification efficiency of the denitrification unit.

[0036] Therefore, this application provides an ammonia atomization device to solve the technical problem in the related art where the injection flow rate into the SCR reactor is usually between 2L / h and 3L / h, and the large ammonia injection flow rate affects the denitrification efficiency of the denitrification device.

[0037] Figure 1 This is a schematic diagram of an ammonia atomizing device provided in one embodiment of this application.

[0038] This application provides an ammonia atomizing device, referring to... Figure 1 It includes: an ammonia atomizing mechanism 100, a dilution fan 200, a heating mechanism 300, and a mixer 400;

[0039] The ammonia atomizing mechanism 100 includes an ammonia tank and an ultrasonic atomizer. The ammonia tank is used to contain ammonia, and the ultrasonic atomizer is disposed in the ammonia tank. The ultrasonic atomizer is configured to atomize the ammonia in the ammonia tank to form ammonia mist.

[0040] The outlet of the dilution fan 200 is connected to the inlet of the heating mechanism 300, and the outlet of the heating mechanism 300 is connected to the first air inlet of the mixer 400, so that the dilution air generated by the dilution fan 200 is heated by the heating mechanism 300 and then input into the mixer 400.

[0041] The second air inlet of the mixer 400 is connected to the ammonia water tank. Ammonia water mist flows into the mixer 400 through the second air inlet. The mixer 400 is configured to mix the ammonia water mist and the heated dilution air to evaporate into ammonia gas and water vapor. The inlet end of the second air inlet of the mixer 400 is located above the preset liquid level of the ammonia water tank.

[0042] It should be noted that ultrasonic atomizers include single-crystal piezoelectric ceramic atomizers, microporous mesh atomizers, and Langevin transducer atomizers. In this embodiment, a single-crystal piezoelectric ceramic ultrasonic atomizer can be used. Ultrasonic waves are emitted by the piezoelectric ceramic transducer vibrating in the ammonia water of the ammonia tank. When the ultrasonic waves reach the interface between the ammonia water and the air, due to the significant difference in acoustic impedance between the different media, the ultrasonic energy rapidly accumulates at the interface and atomizes the ammonia water.

[0043] In practice, the atomized particle size, atomization concentration, and atomization volume of ammonia water can be adjusted by regulating the frequency of the ultrasonic atomizer.

[0044] In practical use, when the ultrasonic atomizer is turned on, the ultrasonic chip inside converts electrical energy into ultrasonic energy. This ultrasonic energy atomizes ammonia water into tiny mist particles of 1μm to 5μm, i.e., ammonia water mist. The ammonia water mist flows into the mixer 400. Simultaneously, the dilution air generated by the dilution fan 200 flows into the heating mechanism 300, is heated, and then flows into the mixer 400. At this time, the mixer 400 contains ammonia water mist and heated dilution air. The ammonia water mist and the heated dilution air mix and evaporate into ammonia gas and water vapor within the mixer 400. It should be noted that the ammonia gas atomization rate provided by the ammonia water atomization device in this application embodiment can reach 0.4L / h to 10L / h.

[0045] From the above description, it can be seen that this solution achieves the following technical effects:

[0046] This application provides an ammonia atomizing device. In this embodiment, by using an ultrasonic atomizer, ammonia water can be atomized into tiny mist particles (i.e., ammonia mist) of 1μm to 5μm. The ammonia mist flows into a mixer 400. Simultaneously, dilution air generated by a dilution fan 200, heated by a heating mechanism 300, also enters the mixer 400. Within the mixer 400, the ammonia mist and the heated dilution air are uniformly mixed, thereby evaporating the ammonia mist. Firstly, this dilutes the ammonia mist to a safe concentration; secondly, it maintains a certain temperature for the ammonia gas, preventing liquefaction; and thirdly, it further vaporizes and dilutes the ammonia mist to achieve the user's desired low flow rate. This application provides an ammonia atomizing device capable of achieving a low flow rate.

[0047] In some examples, mixer 400 is configured as a Venturi mixer, which includes a nozzle, a suction chamber, and a mixing chamber that are in communication with each other, wherein the inner diameter of the nozzle is smaller than the inner diameter of the suction chamber and the mixing chamber.

[0048] The nozzle has a first air inlet, the suction chamber has a second air inlet, and the ammonia mist and heated dilution air are mixed in the mixing chamber.

[0049] In this embodiment, by configuring the Venturi mixer, the inner diameter of the nozzle can be set smaller than the inner diameters of the suction chamber and the mixing chamber. By connecting the outlet of the dilution fan 200 with the inlet of the Venturi mixer nozzle, the flow velocity of the dilution air can be further increased after passing through the smaller-diameter nozzle, creating a larger negative pressure near the outlet of the nozzle, i.e., near the outlet of the suction chamber. This allows the ammonia mist in the ammonia tank to be drawn into the mixing chamber through the suction chamber. Furthermore, this embodiment also allows the ammonia tank to be under negative pressure, preventing ammonia mist leakage.

[0050] For example, the outlet of the dilution fan 200 is also connected to the ammonia water tank to drive the ammonia water mist into the mixer 400; wherein the air inlet of the ammonia water tank is set above the preset liquid level of the ammonia water tank.

[0051] For example, the air inlet of the ammonia tank is located above the ammonia level inside the tank.

[0052] For example, the air inlet of the ammonia tank and the air outlet of the dilution fan 200 are connected by a connecting pipe 210. A regulating valve 220 can be installed on the connecting pipe 210 to control the air flow of the dilution fan 200.

[0053] In this embodiment, by connecting the outlet of the dilution fan 200 to the ammonia tank, a negative pressure can be further generated for the ammonia mist produced by the ultrasonic atomizer in the ammonia tank, so that the ammonia mist can flow into the mixer 400.

[0054] For example, the ammonia tank is equipped with an inlet pipe that connects the ammonia tank and the ammonia storage tank.

[0055] The ammonia atomization device also includes a level sensor, a control valve, and a controller;

[0056] A liquid level sensor is installed inside the ammonia tank to monitor the liquid level in the ammonia tank, and a control valve is installed on the inlet pipe to control the input of ammonia water from the ammonia storage tank into the ammonia tank.

[0057] Both the level sensor and the control valve are connected to the controller. The controller is set with a preset level value. The level sensor outputs the level signal of the ammonia tank to the controller. When the level signal value is greater than the preset level value, the controller outputs a shut-off signal to the control valve.

[0058] For example, the ammonia atomizing mechanism 100 is also provided with a control panel 110, wherein the controller can be the control panel 110. The control panel 110 is provided with a display screen, which can be used to display the liquid level value of the ammonia tank detected by the liquid level sensor.

[0059] This application embodiment, through the setting of sensors, control valves and controllers, can detect the liquid level in the ammonia tank in real time through the liquid level sensor, and send the liquid level signal to the controller. The controller controls the opening and closing of the control valve according to the liquid level value of the liquid level signal, thereby ensuring that the water in the ammonia tank is kept within the preset liquid level.

[0060] In other examples, multiple ultrasonic atomizers are evenly arranged, and all of them are positioned below a preset liquid level.

[0061] This embodiment of the application improves atomization efficiency by uniformly arranging multiple ultrasonic atomizers, thereby enabling faster atomization of the ammonia in the ammonia tank.

[0062] For example, the heating mechanism 300 includes a housing and an electric heating wire;

[0063] The housing has a heating chamber that connects the outlet of the dilution fan 200 and the first inlet of the mixer 400. An electric heating wire is installed in the heating chamber to heat the dilution air generated by the dilution fan 200.

[0064] In this embodiment, a heating chamber is formed by the housing, and an electric heating wire is provided in the heating chamber to heat the dilution air. This allows the heated dilution air to evaporate the ammonia mist in the mixer 400, and further heats the evaporated ammonia gas to prevent ammonia liquefaction.

[0065] For example, the ammonia tank is equipped with a rinsing port for rinsing the ammonia tank, and also with a drain port for discharging wastewater.

[0066] For example, the flushing port and the drain port can be set to the same opening in the ammonia tank, or they can be different openings in the ammonia tank.

[0067] It should be noted that both the rinsing port and the drain port are located at the bottom of the side wall of the ammonia tank.

[0068] This embodiment of the application provides a rinsing port on the ammonia water tank, facilitating the rinsing of the ammonia water tank by workers. This embodiment also provides a drain outlet on the ammonia water tank, facilitating the discharge of wastewater from the tank.

[0069] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0070] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. An ammonia atomizing device, characterized in that, The application relates to an ammonia water atomization device. The ammonia water atomization device comprises an ammonia water tank, an ultrasonic atomizer, a dilution fan, a heating mechanism and a mixer. The ammonia water tank is used for containing ammonia water, and the ultrasonic atomizer is arranged in the ammonia water tank and is configured to atomize the ammonia water in the ammonia water tank to form ammonia water mist. An air outlet of the dilution fan is communicated with an inlet of the heating mechanism, and an outlet of the heating mechanism is communicated with a first air inlet of the mixer so as to input the dilution air formed by the dilution fan into the mixer after being heated by the heating mechanism. A second air inlet of the mixer is communicated with the ammonia water tank, the ammonia water mist flows into the mixer through the second air inlet, and the mixer is configured to mix the ammonia water mist and the heated dilution air to evaporate into ammonia gas and water vapor.

2. An ammonia water atomizing device according to claim 1, characterized in that The second air inlet of the mixer is arranged above a preset liquid level of the ammonia water tank. The mixer is a Venturi mixer which comprises a nozzle, a suction chamber and a mixing chamber which are communicated with each other.

3. An aqueous ammonia atomizing device according to claim 1, wherein The air inlet of the nozzle is the first air inlet, the air inlet of the suction chamber is the second air inlet, and the ammonia water mist and the heated dilution air are mixed in the mixing chamber.

4. An aqueous ammonia atomizing device according to claim 1, wherein The air outlet of the dilution fan is also communicated with the ammonia water tank so as to drive the ammonia water mist to flow into the mixer. The air inlet end of the ammonia water tank is arranged above the preset liquid level of the ammonia water tank. The ammonia water tank is provided with a liquid inlet pipe which is communicated with the ammonia water tank and an ammonia water storage tank. The ammonia water atomization device further comprises a liquid level sensor, a control valve and a controller.

5. An ammonia water atomizing device according to any one of claims 1 to 4, characterized in that The liquid level sensor is arranged in the ammonia water tank to monitor the liquid level value in the ammonia water tank, and the control valve is arranged in the liquid inlet pipe to control the input of the ammonia water from the ammonia water storage tank into the ammonia water tank.

6. An ammonia water atomizing device according to any one of claims 1 to 4, characterized in that The liquid level sensor and the control valve are both signal-connected with the controller which is provided with a preset liquid level value. The liquid level sensor outputs a liquid level signal of the ammonia water tank to the controller, and when the liquid level value of the liquid level signal is greater than the preset liquid level value, the controller outputs a closing signal to the control valve.

7. An ammonia water atomizing device according to any one of claims 1 to 4, characterized in that The ultrasonic atomizers are uniformly arranged. The heating mechanism comprises a shell and an electric heating wire. The shell is formed with a heating cavity which is communicated with the air outlet of the dilution fan and the first inlet of the mixer, and the electric heating wire is arranged in the heating cavity to heat the dilution air formed by the dilution fan. The ammonia water tank is provided with a flushing port for flushing the ammonia water tank and a sewage discharge port for discharging sewage.

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