A boiler flue gas denitration reaction spraying device

Abstract

This utility model relates to a boiler flue gas denitrification reaction spray device, belonging to the technical field of spray device technology. It includes a base and a dust removal tower fixedly connected to the top of the base. The spray tower is fixedly connected to the top of the base, and the dust removal tower contains a dust removal mechanism for removing dust from the flue gas. The dust removal mechanism includes a support plate slidably connected inside the dust removal tower. This boiler flue gas denitrification reaction spray device, by setting up dust removal filter bags and a support plate, and by setting up an air inlet pipe, can filter the dust in the flue gas, ensuring that the flue gas entering the spray tower does not contain a large amount of dust, thus improving the reaction efficiency between reactants and catalysts. Furthermore, by setting up a dual-shaft motor to drive an eccentric wheel to rotate, and by setting up a return spring, the support plate and the dust removal filter bags can vibrate up and down, facilitating the shaking off of dust from the surface of the dust removal filter bags, achieving a dust removal effect and extending the service life of the dust removal filter bags.

Description

Technical Field

[0001] This utility model relates to the technical field of spray devices, specifically a boiler flue gas denitrification reaction spray device. Background Technology

[0002] Boiler flue gas denitrification mainly refers to the process of converting nitrogen oxides in flue gas into harmless nitrogen and water using denitrification agents. Common methods include selective catalytic reduction (SCR) and selective non-catalytic reduction (SNR). Boilers are energy conversion devices, and the flue gas produced during boiler combustion needs to undergo denitrification treatment before being emitted to avoid serious consequences for the environment and human health. Denitrification treatment of boiler flue gas requires appropriate spraying devices.

[0003] A spraying device is required in the denitrification process of boiler flue gas. Chinese utility model patent CN217662528U discloses a spraying device for a boiler flue gas denitrification reaction tower, belonging to the field of flue gas denitrification technology. It addresses the problems of residue accumulation at localized locations between the inner circumference of the spraying device and the catalytic reaction layer inside the device, as well as the limitations of the spraying range. The device includes a sprayer shell, a base fixed to the bottom of the shell, an electric push rod installed in the middle of the base's inner cavity, a moving seat at the bottom of the shell's inner cavity, and a connecting plate at the bottom of the moving seat. This utility model cleans the contact area between the catalytic reaction layer and the inner circumference of the sprayer shell by having a cleaning sleeve revolve around the middle of the moving seat while simultaneously making a circular motion. This removes residue from the flue gas adhering to the contact area, ensuring the effective reaction between the flue gas and the catalytic reaction layer.

[0004] However, this utility model does not have a structure for removing dust from flue gas during use. If the flue gas contains a large amount of dust, it will gradually cover the surface of the catalyst, block the microporous structure of the catalyst, reduce the contact area between the reactants and the catalyst, thereby reducing the activity of the catalyst and causing a decrease in denitrification efficiency, which cannot meet the production requirements. Therefore, a boiler flue gas denitrification reaction spray device is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a boiler flue gas denitrification reaction spray device, which has the advantage of facilitating dust removal from flue gas. It solves the problem that existing spray devices do not have a structure for dust removal from flue gas. If the flue gas contains a large amount of dust, it will gradually cover the surface of the catalyst, block the microporous structure of the catalyst, reduce the contact area between the reactants and the catalyst, thereby reducing the activity of the catalyst and causing a decrease in denitrification efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a boiler flue gas denitrification reaction spray device, comprising a base and a dust removal tower fixedly connected to the top of the base, wherein the top of the base is fixedly connected to the spray tower, and the dust removal tower is provided with a dust removal mechanism capable of removing dust from the flue gas.

[0007] The dust removal mechanism includes a support plate slidably connected to the inside of the dust removal tower. A dust removal filter bag extending to the bottom of the support plate is fixedly connected to the top of the support plate. An installation frame is fixedly connected inside the dust removal tower. A dual-shaft motor is fixedly installed on the top of the installation frame. An eccentric wheel extending to the bottom of the installation frame is fixedly connected to the output shaft of the dual-shaft motor. The lower surface of the eccentric wheel abuts against the upper surface of the support plate.

[0008] A floating valve tray is fixedly connected to the inner wall of the spray tower. A float plate is fixedly connected to the top of the floating valve tray. An opening adapted to the float plate is opened inside the floating valve tray. There are four floating valve trays. A first overflow plate and a second overflow plate are fixedly connected to the side of the four floating valve trays away from the inner wall of the spray tower, respectively. The total number of the first overflow plate and the second overflow plate is four.

[0009] Furthermore, a positioning guide rod is fixedly connected inside the dust removal tower, a positioning sleeve is slidably connected to the outside of the positioning guide rod, a return spring is fixedly connected between the positioning sleeve and the dust removal tower, and a connecting block is fixedly connected between the support plate and the positioning sleeve.

[0010] Furthermore, an air inlet pipe extending into the dust removal tower is fixedly connected to the side of the dust removal tower away from the spray tower, and an air supply pipe communicating with the spray tower is fixedly connected to the top of the dust removal tower.

[0011] Furthermore, a collection box extending to the front of the dust removal tower is slidably connected to the inner bottom wall of the dust removal tower, and a guide hopper connected to the collection box is fixedly connected inside the dust removal tower.

[0012] Furthermore, a liquid delivery pipe extending into the interior of the spray tower is fixedly connected to the side of the spray tower away from the dust removal tower, and a spray steel pipe is fixedly connected to one end of the liquid delivery pipe inside the spray tower. A filter plate is fixedly installed on the top inside the spray tower.

[0013] Furthermore, the top of the spray tower is fixedly connected to an exhaust pipe that communicates with its interior, and the bottom of one side of the spray tower is fixedly connected to a drain pipe that extends into its interior.

[0014] Compared with the prior art, this utility model provides a boiler flue gas denitrification reaction spray device, which has the following beneficial effects:

[0015] 1. This boiler flue gas denitrification reaction spray device, by setting up dust removal filter bags and support plates, and by setting up an air inlet pipe, can filter the dust in the flue gas, so that the flue gas entering the spray tower does not contain a large amount of dust, thereby improving the reaction efficiency of reactants and catalysts. Furthermore, by setting up a dual-shaft motor to drive the eccentric wheel to rotate, and by setting up a return spring, the support plate and the dust removal filter bags can vibrate up and down, thereby facilitating the shaking off of dust from the surface of the dust removal filter bags, achieving the effect of cleaning dust and improving the service life of the dust removal filter bags.

[0016] 2. This boiler flue gas denitrification reaction spray device, by setting up a floating valve tower plate and a floating plate, allows gas to be sprayed out through the port at a certain speed, making full contact with the liquid on the floating valve tower plate. This contact method enables the gas and liquid phases to exchange matter and transfer heat over a large contact area, providing good conditions for the mass transfer process. It solves the problem that existing spray devices do not have a structure for dust removal from the flue gas. If the flue gas contains a large amount of dust, it will gradually cover the catalyst surface, block the microporous structure of the catalyst, reduce the contact area between the reactants and the catalyst, thereby reducing the activity of the catalyst and causing a decrease in denitrification efficiency. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the dual-axis motor of this utility model;

[0019] Figure 3 This utility model Figure 1 A magnified structural diagram of structure A is shown below;

[0020] Figure 4 This is a three-dimensional structural view of the floating valve tower plate of this utility model.

[0021] In the diagram: 1. Base, 2. Dust removal tower, 3. Spray tower, 4. Support plate, 5. Dust removal filter bag, 6. Mounting frame, 7. Dual-shaft motor, 8. Eccentric wheel, 9. Positioning guide rod, 10. Positioning sleeve, 11. Return spring, 12. Air inlet pipe, 13. Air delivery pipe, 14. Collection box, 15. Guide bucket, 16. Floating valve tower plate, 17. Floating plate, 18. Port, 19. First overflow plate, 20. Second overflow plate, 21. Liquid delivery pipe, 22. Spray steel pipe, 23. Filter plate, 24. Exhaust pipe, 25. Drain pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 3 This embodiment of a boiler flue gas denitrification reaction spray device includes a base 1 and a dust removal tower 2 fixedly connected to the top of the base 1. A spray tower 3 is fixedly connected to the top of the base 1. The dust removal tower 2 is equipped with a dust removal mechanism capable of removing dust from the flue gas. The dust removal mechanism includes a support plate 4 slidably connected to the inside of the dust removal tower 2. A dust removal filter bag 5 extending to the bottom of the support plate 4 is fixedly connected to the top of the support plate 4. A mounting frame 6 is fixedly connected to the inside of the dust removal tower 2. A dual-shaft motor 7 is fixedly installed on the top of the mounting frame 6. An eccentric wheel 8 extending to the bottom of the mounting frame 6 is fixedly connected to the output shaft of the dual-shaft motor 7. The lower surface of the eccentric wheel 8 abuts against the upper surface of the support plate 4.

[0024] Specifically, a positioning guide rod 9 is fixedly connected inside the dust removal tower 2, a positioning sleeve 10 is slidably connected to the outside of the positioning guide rod 9, a return spring 11 is fixedly connected between the positioning sleeve 10 and the dust removal tower 2, a connecting block is fixedly connected between the support plate 4 and the positioning sleeve 10, an air inlet pipe 12 extending into the side of the dust removal tower 2 away from the spray tower 3 is fixedly connected, and an air supply pipe 13 communicating with the spray tower 3 is fixedly connected to the top of the dust removal tower 2.

[0025] It should be noted that there are nine dust filter bags 5. The inner wall of the dust removal tower 2 is provided with a movable groove that matches the connecting block. By setting the dust filter bags 5 and the support plate 4, and by setting the air inlet pipe 12, the dust in the flue gas can be filtered, so that the flue gas entering the spray tower 3 does not contain a large amount of dust, thereby improving the reaction efficiency of reactants and catalysts. By setting the dual-shaft motor 7 to drive the eccentric wheel 8 to rotate, and by setting the reset spring 11, the support plate 4 and the dust filter bags 5 can vibrate up and down, which makes it easier to shake off the dust on the surface of the dust filter bags 5, thus achieving the effect of cleaning dust.

[0026] Please see Figure 1 In this embodiment, a collection box 14 extending to the front of the dust removal tower 2 is slidably connected to the inner bottom wall of the dust removal tower 2, and a guide bucket 15 connected to the collection box 14 is fixedly connected inside the dust removal tower 2.

[0027] Specifically, the air inlet pipe 12 is located between the dust filter bag 5 and the guide hopper 15. By setting the guide hopper 15 and the collection box 14, it is convenient to collect dust.

[0028] Please see Figure 1 and Figure 4 In this embodiment, a floating valve tower plate 16 is fixedly connected to the inner wall of the spray tower 3, and a floating plate 17 is fixedly connected to the top of the floating valve tower plate 16. The interior of the floating valve tower plate 16 is provided with an opening 18 that is compatible with the floating plate 17. There are four floating valve tower plates 16. A first overflow plate 19 and a second overflow plate 20 are fixedly connected to the side of the four floating valve tower plates 16 away from the inner wall of the spray tower 3, respectively. The total number of the first overflow plate 19 and the second overflow plate 20 is four.

[0029] Specifically, there are three first overflow plates 19, and the length of the second overflow plate 20 is greater than the length of the first overflow plate 19.

[0030] It should be noted that the overflow plate can block the flow of liquid on the tray, so that the liquid forms a liquid layer of a certain height on the tray. The appropriate liquid layer height is an important condition for ensuring sufficient gas-liquid contact and mass transfer. Without the overflow plate, the liquid may flow down the tray quickly and fail to form a stable liquid layer. If the gas-liquid contact time is too short, the mass transfer effect will be greatly reduced.

[0031] Please see Figure 1 In this embodiment, a liquid delivery pipe 21 extending into the side of the spray tower 3 away from the dust removal tower 2 is fixedly connected. A spray steel pipe 22 is fixedly connected to one end of the liquid delivery pipe 21 inside the spray tower 3. A filter plate 23 is fixedly installed on the top inside the spray tower 3.

[0032] Specifically, the top of the spray tower 3 is fixedly connected to an exhaust pipe 24 that communicates with its interior, and the bottom of one side of the spray tower 3 is fixedly connected to a drain pipe 25 that extends into its interior.

[0033] The working principle of the above embodiments is as follows:

[0034] First, the staff connects the air inlet pipe 12 to the flue gas pipe. Then, the flue gas enters the dust removal tower 2. At this time, the dust filter bag 5 adsorbs the dust in the flue gas. The filtered flue gas enters the spray tower 3 through the air delivery pipe 13. At this time, the catalyst is sprayed out through the spray steel pipe 22. At the same time, the flue gas is sprayed out through the float valve probe 16, so as to fully react with the catalyst. After the denitrification reaction, the flue gas is finally filtered by the filter plate 23 and then discharged.

[0035] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0036] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to 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.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas denitrification reaction spray device, comprising a base (1) and a dust removal tower (2) fixedly connected to the top of the base (1), characterized in that: The top of the base (1) is fixedly connected to a spray tower (3), and the dust removal tower (2) is equipped with a dust removal mechanism that can remove dust from flue gas. The dust removal mechanism includes a support plate (4) slidably connected inside the dust removal tower (2). A dust removal filter bag (5) extending to the bottom of the support plate (4) is fixedly connected to the top of the support plate (4). An installation frame (6) is fixedly connected inside the dust removal tower (2). A dual-shaft motor (7) is fixedly installed on the top of the installation frame (6). An eccentric wheel (8) extending to the bottom of the installation frame (6) is fixedly connected to the output shaft of the dual-shaft motor (7). The lower surface of the eccentric wheel (8) abuts against the upper surface of the support plate (4). A floating valve tower plate (16) is fixedly connected to the inner wall of the spray tower (3). A floating plate (17) is fixedly connected to the top of the floating valve tower plate (16). An opening (18) adapted to the floating plate (17) is opened inside the floating valve tower plate (16). There are four floating valve tower plates (16). A first overflow plate (19) and a second overflow plate (20) are fixedly connected to the side of the four floating valve tower plates (16) away from the inner wall of the spray tower (3). The sum of the number of the first overflow plate (19) and the second overflow plate (20) is four.

2. The boiler flue gas denitrification reaction spray device according to claim 1, characterized in that: The dust removal tower (2) is fixedly connected to a positioning guide rod (9) inside, and a positioning sleeve (10) is slidably connected to the outside of the positioning guide rod (9). A reset spring (11) is fixedly connected between the positioning sleeve (10) and the dust removal tower (2). A connecting block is fixedly connected between the support plate (4) and the positioning sleeve (10).

3. The boiler flue gas denitrification reaction spray device according to claim 1, characterized in that: The dust removal tower (2) has an air inlet pipe (12) fixedly connected to the side away from the spray tower (3), and the top of the dust removal tower (2) has an air supply pipe (13) connected to the spray tower (3).

4. The boiler flue gas denitrification reaction spray device according to claim 1, characterized in that: The dust removal tower (2) has a collection box (14) that extends to its front side slidably connected to the inner bottom wall, and a guide bucket (15) that communicates with the collection box (14) is fixedly connected inside the dust removal tower (2).

5. The boiler flue gas denitrification reaction spray device according to claim 1, characterized in that: The spray tower (3) is fixedly connected to a liquid delivery pipe (21) extending into it on the side away from the dust removal tower (2). The end of the liquid delivery pipe (21) located inside the spray tower (3) is fixedly connected to a spray steel pipe (22). A filter plate (23) is fixedly installed on the top inside the spray tower (3).

6. The boiler flue gas denitrification reaction spray device according to claim 1, characterized in that: The top of the spray tower (3) is fixedly connected to an exhaust pipe (24) that communicates with its interior, and the bottom of one side of the spray tower (3) is fixedly connected to a drain pipe (25) that extends into its interior.

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