A reactor for flue gas desulfurization and denitrification treatment

Abstract

The utility model discloses a reactor for flue gas desulfurization and denitration treatment belongs to flue gas treatment technical field, including the absorption tower, the bottom of absorption tower is provided with the liquid storage tank, the side of absorption tower is provided with the air inlet pipe, the end of air inlet pipe is provided with the denitration equipment, the top of absorption tower is provided with dust extraction mechanism, be provided with the spraying mechanism on absorption tower and liquid storage tank, the side of liquid storage tank is fixed with first suction pump of absorbing pulp and installs, in the utility model, gypsum pulp in the bottom of the inner chamber of liquid storage tank is extracted in time through third suction pump and slurry discharge pipe, and gypsum hydrocyclone is utilized to gypsum pulp and carries out solid -liquid separation to the subsequent collection, in addition, the desulfurizer in the external preparation tank is supplemented to the inner chamber of liquid storage tank through first suction pump and slurry extraction pipe, guarantees the amount of desulfurizer in the inner chamber of liquid storage tank, so that the desulfurizer is sprayed out to carry out desulfurization to flue gas through spraying mechanism, and the practicality is good.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and more specifically, to a reactor for flue gas desulfurization and denitrification treatment. Background Technology

[0002] Flue gas is a mixture of gases and dust, and is a major cause of air pollution in residential areas. The composition of flue gas is very complex, including water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. Therefore, flue gas treatment requires desulfurization and denitrification.

[0003] A search revealed a patent with publication number CN222943236U, which discloses an integrated coal-fired flue gas desulfurization and denitrification device, including a denitrification component, a desulfurization component, and a control component. The denitrification component includes a first static mixer, a second static mixer, and a catalytic reactor. The main inlet of the first static mixer is connected to an ammonia source, the gas filling port of the first static mixer is connected to an air source, the outlet of the first static mixer is connected to the main inlet of the second static mixer, the gas filling port of the second static mixer is connected to a flue gas source, and the outlet of the second static mixer is connected to a first gas supply pipe. The catalytic reactor includes a reaction cylinder, which is symmetrically arranged. The top of the reaction cylinder has an inlet end, and the bottom of the reaction cylinder has an outlet end. Both the outlet end and the inlet end are equipped with a three-way electric reversing air valve. One end of the first gas supply pipe is connected to the inlet of the three-way electric reversing air valve at the inlet end of the reaction cylinder. The above-mentioned patent has the following shortcomings: although it can replace the denitrification catalyst without interruption, it is not convenient to replenish the desulfurizing agent in time when using the desulfurizing agent to desulfurize the flue gas, nor is it convenient to discharge the gypsum slurry generated in the desulfurizing agent. In addition, it is not convenient to treat the flue gas dust after desulfurization. Therefore, we propose a reactor for flue gas desulfurization and denitrification treatment. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a reactor for flue gas desulfurization and denitrification treatment.

[0005] To solve the above problems, the present invention adopts the following technical solution: A reactor for flue gas desulfurization and denitrification includes an absorption tower, a storage tank at the bottom of the absorption tower, an air inlet pipe on the side of the absorption tower, a denitrification device at the end of the air inlet pipe, a dust collection mechanism at the top of the absorption tower, a spraying mechanism on the absorption tower and the storage tank, a first slurry pump fixedly installed on the side of the storage tank, the output end of the first slurry pump extending to the upper part of the inner cavity of the storage tank, a slurry suction pipe fixedly connected to the input end of the first slurry pump, a third slurry pump fixedly installed on the outside of the storage tank, the input end of the third slurry pump extending to the bottom of the inner cavity of the storage tank, a slurry discharge pipe fixedly connected to the output end of the third slurry pump, a gypsum hydrocyclone at the end of the slurry discharge pipe, and a liquid level sensor at the top of the inner cavity of the storage tank.

[0006] As a preferred embodiment of this utility model, the dust collection mechanism includes an air guide pipe fixedly connected to the top of the absorption tower, a filter box fixedly sleeved at the end of the air guide pipe, a door hinged to the outside of the filter box, an exhaust pipe fixedly sleeved to the outside of the filter box, an external threaded ring fixedly connected to the top of the inner cavity of the filter box, an internal threaded ring threaded to the outside of the external threaded ring, and a dust collection bag fixedly connected to the bottom surface of the internal threaded ring.

[0007] As a preferred embodiment of this utility model, the spraying mechanism includes a second slurry pump fixedly installed on the outside of the storage tank. The input end of the second slurry pump extends into the inner cavity of the storage tank. The output end of the second slurry pump is fixedly connected to a slurry guide pipe. Multiple slurry spraying main pipes are fixedly connected to the side of the slurry guide pipe. The ends of the multiple slurry spraying main pipes are respectively fixedly sleeved to the inner cavity of the absorption tower and fixedly connected to multiple slurry spraying ring pipes. Multiple atomizing spray holes are provided on the bottom surface of both the slurry spraying ring pipes and the slurry spraying main pipes.

[0008] As a preferred embodiment of this utility model, a pressurizing fan is provided on the air intake pipe.

[0009] As a preferred embodiment of this utility model, a controller is fixedly installed on the outside of the filter box.

[0010] As a preferred embodiment of this utility model, the inner cavity of the absorption tower is provided with multiple demisters.

[0011] Compared with existing technologies, the advantages of this utility model are: (1) In this utility model, the gypsum slurry at the bottom of the inner cavity of the storage tank is extracted by the third suction pump and the slurry discharge pipe at regular intervals, and the gypsum cyclone separator is used to separate the solid and liquid of the gypsum slurry for subsequent collection. In addition, the first suction pump and the slurry discharge pipe are used to supplement the desulfurizing agent in the external slurry preparation tank into the inner cavity of the storage tank to ensure the amount of desulfurizing agent in the inner cavity of the storage tank so that the spraying mechanism can spray out the desulfurizing agent to desulfurize the flue gas. It has good practicality.

[0012] (2) In this utility model, the flue gas after desulfurization and denitrification is introduced into the dust collection bag in the inner cavity of the filter box through the air guide pipe. The dust collection bag is used to intercept and collect the dust contained in the flue gas. The flue gas enters the inner cavity of the filter box through the dust collection bag and is discharged from the exhaust pipe, thus realizing the function of treating the dust in the flue gas. It has good practicality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the front of this utility model; Figure 2 This is a schematic diagram of the overall structure of the back of this utility model; Figure 3 This is a cross-sectional schematic diagram of the absorption tower of this utility model; Figure 4 This is a schematic diagram of the absorption tower of this utility model.

[0014] Explanation of the labels in the diagram: 1. Absorption tower; 2. Storage tank; 3. Air inlet pipe; 4. Denitrification equipment; 5. Dust collection mechanism; 6. Spraying mechanism; 7. Third slurry pump; 8. Slurry discharge pipe; 9. Gypsum hydrocyclone; 10. First slurry pump; 11. Slurry extraction pipe; 12. Liquid level sensor; 13. Air guide pipe; 14. Filter box; 15. Box door; 16. Exhaust pipe; 17. External threaded ring; 18. Internal threaded ring; 19. Dust collection bag; 20. Controller; 21. Second slurry pump; 22. Slurry guide pipe; 23. Main spraying pipe; 24. Spraying ring pipe; 25. Atomizing nozzle; 26. Pressurized fan; 27. Demister. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example 1: like Figures 1 to 4 As shown, a reactor for flue gas desulfurization and denitrification includes an absorption tower 1, a storage tank 2 at the bottom of the absorption tower 1, an air inlet pipe 3 on the side of the absorption tower 1, and a denitrification device 4 at the end of the air inlet pipe 3. The denitrification device 4 is prior art and will not be described in detail. A dust collection mechanism 5 is provided at the top of the absorption tower 1, and a spraying mechanism 6 is provided on the absorption tower 1 and the storage tank 2. A first slurry pump 10 is fixedly installed on the side of the storage tank 2, with its output end extending to the upper part of the inner cavity of the storage tank 2. A slurry suction pipe 11 is fixedly connected to the input end of the first slurry pump 10, and its end is connected to an external desulfurizing agent slurry preparation tank, so that the lime desulfurizing agent in the slurry preparation tank is added to the inner cavity of the storage tank 2. A third slurry pump 7 is fixedly installed on the outside of the storage tank 2, with its input end extending to the bottom of the inner cavity of the storage tank 2. A slurry discharge device is fixedly connected to the output end of the third slurry pump 7. The end of the pipe 8 and the discharge pipe 8 is equipped with a gypsum hydrocyclone 9. The gypsum hydrocyclone 9 is used to separate the gypsum slurry into solid and liquid, so that the liquid is discharged from the pipe above the gypsum hydrocyclone 9 and the solid is discharged from the pipe below the gypsum hydrocyclone 9. The top of the inner cavity of the storage tank 2 is equipped with a liquid level sensor 12. The spraying mechanism 6 includes a second suction pump 21 fixedly installed on the outside of the storage tank 2. The input end of the second suction pump 21 extends into the inner cavity of the storage tank 2. The output end of the second suction pump 21 is fixedly connected to a guide pipe 22. Multiple spraying main pipes 23 are fixedly connected to the side of the guide pipe 22. The ends of the multiple spraying main pipes 23 are respectively fixedly sleeved to the inner cavity of the absorption tower 1 and fixedly connected to multiple spraying ring pipes 24. Multiple atomizing spray holes 25 are provided on the bottom surface of the spraying ring pipes 24 and the spraying main pipes 23. A pressurizing fan 26 is provided on the air inlet pipe 3. Multiple demisters 27 are provided in the inner cavity of the absorption tower 1.

[0019] Example 2: Based on Example 1, such as Figures 1 to 4As shown, the dust collection mechanism 5 includes an air duct 13 fixedly connected to the top of the absorption tower 1. A filter box 14 is fixedly sleeved at the end of the air duct 13. A door 15 is hinged to the outside of the filter box 14. An exhaust pipe 16 is fixedly sleeved to the outside of the filter box 14. An external threaded ring 17 is fixedly connected to the top of the inner cavity of the filter box 14. An internal threaded ring 18 is threaded onto the outside of the external threaded ring 17. A dust collection bag 19 is fixedly connected to the bottom surface of the internal threaded ring 18. The dust collection bag 19 can be disassembled by the cooperation of the external threaded ring 17 and the internal threaded ring 18 so as to clean the dust collected by the dust collection bag 19.

[0020] Example 3: Based on Embodiment 1 and Embodiment 2, such as Figures 1 to 4 As shown, a controller 20 is fixedly installed on the outside of the filter box 14. The controller 20 is electrically connected to the pressurizing fan 26, the liquid level sensor 12, the third slurry pump 7, the second slurry pump 21, and the first slurry pump 10 through wires. The controller 20 controls the pressurizing fan 26, the liquid level sensor 12, the third slurry pump 7, the second slurry pump 21, and the first slurry pump 10. In addition, the power supply of the external device supplies power to the controller 20, the pressurizing fan 26, the liquid level sensor 12, the third slurry pump 7, the second slurry pump 21, and the first slurry pump 10 through wires.

[0021] It should be noted that this utility model is a reactor for flue gas desulfurization and denitrification. In use, the flue gas is first denitrified by the catalyst inside the denitrification device 4. The denitrified flue gas is then introduced into the inner cavity of the absorption tower 1 through the inlet pipe 3. At the same time, the second suction pump 21 is started to introduce the desulfurizing agent in the inner cavity of the storage tank 2 into the inner cavity of the spray pipe 23 and the spray ring pipe 24 through the guide pipe 22. This allows the desulfurizing agent to be sprayed downward from the atomizing nozzle 25 and come into contact with the flue gas, thereby desulfurizing the flue gas. Then, the desulfurized flue gas is demisted by the demister 27. The demisted flue gas enters the inner cavity of the filter box 14 through the air guide pipe 13 and then enters the inner cavity of the dust collection bag 19. The dust in the flue gas is filtered by the dust collection bag 19. The filtered flue gas is discharged from the exhaust pipe 16 on the side of the filter box 14. The dust is intercepted and collected by the dust collection bag 19. Finally, the controller 20 controls the third suction pump 7 to run for a predetermined time. The gypsum slurry at the bottom of the inner cavity of the storage tank 2 is drawn into the inner cavity of the gypsum hydrocyclone 9 for separation by the discharge pipe 8 and the third suction pump 7. The controller 20 controls the first suction pump 10 to start, so that the suction pipe 11 generates suction to add the desulfurizing agent in the external slurry preparation tank into the inner cavity of the storage tank 2. The first suction pump 10 stops running when the top liquid level of the desulfurizing agent is detected by the liquid level sensor 12.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A reactor for flue gas desulfurization and denitrification treatment, comprising an absorption tower (1), characterized in that: The absorption tower (1) is provided with a liquid storage tank (2) at the bottom, an air inlet pipe (3) is provided on the side of the absorption tower (1), a denitrification device (4) is provided at the end of the air inlet pipe (3), a dust collection mechanism (5) is provided at the top of the absorption tower (1), a spraying mechanism (6) is provided on the absorption tower (1) and the liquid storage tank (2), and a first slurry pump (10) is fixedly installed on the side of the liquid storage tank (2), with the output end of the first slurry pump (10) extending to the liquid storage tank (2). In the upper part of the inner cavity, the input end of the first slurry pump (10) is fixedly connected to the slurry pipe (11), the outer side of the storage tank (2) is fixedly installed with the third slurry pump (7), the input end of the third slurry pump (7) extends to the bottom of the inner cavity of the storage tank (2), the output end of the third slurry pump (7) is fixedly connected to the slurry discharge pipe (8), the end of the slurry discharge pipe (8) is provided with a gypsum hydrocyclone (9), and the top of the inner cavity of the storage tank (2) is provided with a liquid level sensor (12).

2. The reactor for flue gas desulfurization and denitrification treatment according to claim 1, characterized in that: The dust collection mechanism (5) includes an air guide pipe (13) fixedly connected to the top of the absorption tower (1). A filter box (14) is fixedly sleeved at the end of the air guide pipe (13). A door (15) is hinged to the outside of the filter box (14). An exhaust pipe (16) is fixedly sleeved to the outside of the filter box (14). An external threaded ring (17) is fixedly connected to the top of the inner cavity of the filter box (14). An internal threaded ring (18) is threaded to the outside of the external threaded ring (17). A dust collection bag (19) is fixedly connected to the bottom surface of the internal threaded ring (18).

3. The reactor for flue gas desulfurization and denitrification treatment according to claim 2, characterized in that: The spraying mechanism (6) includes a second suction pump (21) fixedly installed on the outside of the storage tank (2). The input end of the second suction pump (21) extends into the inner cavity of the storage tank (2). The output end of the second suction pump (21) is fixedly connected to a slurry guide pipe (22). The side of the slurry guide pipe (22) is fixedly connected to a plurality of spraying main pipes (23). The ends of the plurality of spraying main pipes (23) are respectively fixedly sleeved into the inner cavity of the absorption tower (1) and fixedly connected to a plurality of spraying ring pipes (24). The bottom surfaces of the spraying ring pipes (24) and the spraying main pipes (23) are provided with a plurality of atomizing spray holes (25).

4. The reactor for flue gas desulfurization and denitrification treatment according to claim 1, characterized in that: A pressurizing fan (26) is installed on the air intake pipe (3).

5. The reactor for flue gas desulfurization and denitrification treatment according to claim 2, characterized in that: A controller (20) is fixedly installed on the outside of the filter box (14).

6. The reactor for flue gas desulfurization and denitrification treatment according to claim 1, characterized in that: The inner cavity of the absorption tower (1) is equipped with multiple demisters (27).

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