Synergistic removal device for flue gas particulate matters and sulfur trioxide

Abstract

The utility model relates to a flue gas particulate matter and sulfur trioxide synergistic removal device which comprises a box body, the inner space of the box body is divided into a desulfurization chamber and a dust removal chamber through a partition plate, a connecting shaft is vertically arranged in the desulfurization chamber, and a driving motor is arranged at the top of the box body. The top of the connecting shaft extends out of the box body and is in transmission connection with a driving motor, a spraying assembly, a packing layer and a stirring assembly are sequentially arranged on the connecting shaft from top to bottom, and a smoke inlet pipe and a smoke outlet pipe are further arranged on the box body; according to the application, a cyclone dust removal structure is utilized to filter flue gas, so that the flue gas discharged into the desulfurization chamber is relatively cleaner, and the absorption effect of an alkaline solution (limestone solution) in the desulfurization chamber is prevented from being influenced; the stirring assembly can effectively expand the contact range of the flue gas and the alkaline solution, so that the absorption effect of the flue gas is improved, the phenomenon that a large amount of SO3 escapes due to local saturation is avoided, and the purification effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of industrial exhaust gas treatment equipment, specifically to a device for the synergistic removal of particulate matter and sulfur trioxide from flue gas. Background Technology

[0002] SO2 and NOx are among the main air pollutants in flue gas from coal-fired power plants. To reduce NOx emissions, most coal-fired power plants have installed SCR (Selective Catalytic Reduction) denitrification devices. The SCR catalyst may catalytically oxidize some SO2 into SO3. Combined with the SO3 generated in the furnace, this brings the SO3 concentration to a certain level, causing harm to the power plant. SO3 emissions into the atmosphere exacerbate smog and cause environmental pollution. The problems caused by SO3 are even more severe when burning high-sulfur coal. Achieving deep SO3 removal is of great significance for the safe and economical operation of power plants and the improvement of the atmospheric environment.

[0003] In existing SO3 treatment equipment, the flue gas is often directly passed into an alkaline solution for absorption and precipitation. However, in actual treatment, the flue gas still contains a large number of particulate impurities. If it is directly discharged into the alkaline solution, the solution will quickly become turbid, affecting the absorption and neutralization of SO3 in the flue gas and requiring frequent replacement of the alkaline solution. Furthermore, the flue gas is passed through a fixed location at a fast speed, so when the solution around the gas becomes saturated, a large amount of SO3-containing flue gas cannot be absorbed and neutralized, affecting the actual effect of tail gas filtration. Utility Model Content

[0004] Based on the above description, this utility model provides a device for the synergistic removal of particulate matter and sulfur trioxide from flue gas, in order to solve the shortcomings of existing exhaust gas treatment equipment, which not only easily leads to rapid turbidity of alkaline solutions, requiring frequent replacement, but also has fixed ventilation parts, resulting in local liquid absorption saturation and affecting the subsequent filtration effect.

[0005] This utility model is achieved through the following technical solution:

[0006] A device for the synergistic removal of particulate matter and sulfur trioxide from flue gas includes a housing. The interior of the housing is divided into a desulfurization chamber and a dust removal chamber by a partition. A connecting shaft is vertically installed in the desulfurization chamber. A drive motor is installed at the top of the housing. The top of the connecting shaft extends to the outside of the housing and is connected to the drive motor for transmission. A spray assembly, a packing layer, and a stirring assembly are arranged sequentially from top to bottom on the connecting shaft. The stirring assembly is connected to the dust removal chamber through a gas supply pipe. The housing also has an inlet pipe and an outlet pipe. The inlet pipe is located on the side wall of the housing and is connected to the interior of the dust removal chamber. The outlet pipe is located at the top of the housing and is connected to the desulfurization chamber.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the internal space of the desulfurization chamber is rectangular, the internal space of the dust removal chamber is inverted conical, one end of the flue gas inlet pipe is connected to the external flue, and the other end of the flue gas inlet pipe extends obliquely along the inner wall of the dust removal chamber and connects to the interior of the dust removal chamber.

[0009] Furthermore, a transmission wheel is provided on the top end of the connecting shaft on the side wall outside the housing, and a drive wheel is provided on the output end of the drive motor, which is engaged with the transmission wheel.

[0010] Furthermore, the connecting shaft has an independent first cavity and a second cavity inside. The first cavity and the second cavity extend to the upper and lower ends respectively and form openings at both ends of the connecting shaft. Ball bearings are provided on the inner sidewalls of the openings.

[0011] Furthermore, the spray assembly includes a cross-shaped mounting bracket, which is fixedly mounted on the connecting shaft. The interior of the mounting bracket is also hollow and communicates with the first cavity. Several spray nozzles are arranged at intervals on the bottom surface of the mounting bracket.

[0012] Furthermore, a water pump is fixedly installed on the side wall of the box. One end of the water pump extends horizontally into the inside of the box and is connected to the bottom of the desulfurization chamber. The other end of the water pump is provided with a water supply pipe. The water supply pipe extends upward along the side wall of the box, and the end of the water supply pipe is vertically inserted into the center of the ball bearing at the top of the connecting shaft and is connected to the first cavity.

[0013] Furthermore, the stirring assembly includes a stirring frame fixedly installed on the side wall of the connecting shaft, and the interior of the stirring frame is hollow and communicates with the second cavity, and a plurality of nozzles are arranged on the bottom surface of the stirring frame.

[0014] Furthermore, the top of the gas supply pipe is inserted into the center of the ball bearing at the bottom of the connecting shaft and communicates with the second cavity, while the other end of the gas supply pipe extends vertically downward into the dust removal chamber and communicates with it.

[0015] Furthermore, the dust removal chamber is provided with a dust discharge port at the bottom, and a dust hopper is connected below the dust discharge port.

[0016] Furthermore, a drain pipe is provided at the bottom of the desulfurization chamber, a water stop valve is provided on the drain pipe, and the other end of the drain pipe extends outward into the interior of the filter tank.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] 1. This application improves upon existing exhaust gas treatment equipment by using a cyclone dust removal structure to prioritize the filtration of flue gas, thereby filtering out a large number of particulate impurities in the flue gas. The flue gas discharged into the desulfurization chamber is relatively cleaner, thus avoiding the impact on the absorption effect of the alkaline solution (limestone solution) in the desulfurization chamber. This significantly improves the absorption capacity of the alkaline solution for flue gas pollutants, eliminating the need for frequent replacement or replenishment of the solution.

[0019] 2. The stirring components used in the desulfurization chamber can effectively expand the contact range between the flue gas and the alkaline solution, thereby improving its absorption effect and avoiding the phenomenon of a large amount of SO3 escaping due to local saturation. In conjunction with the spray components and packing layer at the top, the alkaline solution can be used to perform secondary filtration of the flue gas containing SO3, effectively capturing SO3 in the flue gas and improving the purification effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the box structure in this embodiment;

[0021] Figure 2 This is a schematic diagram of the internal structure of the box in this embodiment;

[0022] Figure 3 This is a schematic diagram of the connecting shaft in this embodiment;

[0023] Figure 4 This is a schematic diagram of the dust removal chamber in this embodiment;

[0024] The components are as follows: 1. Box body; 11. Inlet pipe; 12. Outlet pipe; 13. Desulfurization chamber; 14. Dust removal chamber; 15. Drainage pipe; 2. Connecting shaft; 21. First cavity; 22. Second cavity; 3. Drive motor; 4. Spray assembly; 41. Mounting frame; 42. Spray head; 43. Water pump; 44. Water supply pipe; 5. Mixing assembly; 51. Gas supply pipe; 52. Mixing rack; 6. Packing layer; 7. Ash hopper. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] Combination Figure 1-4 As shown, a device for the synergistic removal of particulate matter and sulfur trioxide from flue gas includes:

[0028] The box 1 is divided into a desulfurization chamber 13 and a dust removal chamber 14 by a partition, and the two are connected to each other. The top and bottom are respectively provided with a flue pipe 11 and a flue pipe 12. The flue gas inside the flue enters the dust removal chamber 14 and the desulfurization chamber 13 through the flue pipe 11, and then is discharged through the flue pipe 12.

[0029] Connecting shaft 2 is vertically installed inside housing 1 and is rotatably connected to housing 1 and partition via ball bearings;

[0030] The drive motor 3 is located on the top of the housing 1 and is connected to the connecting shaft 2 for drive the connecting shaft 2 to rotate in a specific direction;

[0031] The spray assembly 4 is located inside the desulfurization chamber 13. By spraying limestone solution, the limestone solution can be used to absorb SO3 in the flue gas. At the bottom of the assembly 4, there is a packing layer 6 filled with a large number of Pall rings or Raschig rings, which allows the limestone solution to form a large water film on its surface, thereby enhancing the absorption of SO3.

[0032] The stirring component 5 is located at the bottom of the desulfurization chamber 13. A certain amount of limestone solution is injected into the desulfurization chamber 13. After the flue gas is discharged into the chamber, the stirring expands the contact range between the limestone and the flue gas, thus preventing the absorption of SO3 from being affected by local absorption saturation.

[0033] Specifically, in this embodiment, the connecting shaft 2 has a first cavity 21 and a second cavity 22 inside, which are respectively arranged at both ends of the connecting shaft 2. The first cavity 21, located at the top, extends upward and forms an opening at the center of the top surface of the connecting shaft 2, while the second cavity 22, located at the bottom, extends downward and forms an opening at the center of the bottom surface of the connecting shaft 2. Both openings are equipped with ball bearings on their inner sidewalls and are connected to water or gas pipelines by plugging in. Both sides are sealed with elastic sealing gaskets.

[0034] The internal space of the desulfurization chamber 13 is rectangular, while the internal space of the dust removal chamber 14 is inverted conical. One end of the flue gas inlet pipe 11 extends along the tangent of the side wall of the dust removal chamber 14 and communicates with the interior of the dust removal chamber 14, while the flue gas outlet pipe 12 is arranged vertically and communicates with the desulfurization chamber 13.

[0035] The stirring assembly 5 includes a cross-shaped stirring frame 52. The interior of the stirring frame 52 is hollow and communicates with the second cavity 22. An air supply pipe 51 is inserted into the opening at the bottom of the connecting shaft 2. The top end of the air supply pipe 51 extends downward into the dust removal chamber 14, and its bottom is lower than the connection between the smoke inlet pipe 11 and the dust removal chamber 14. A large number of air holes are arranged sequentially on the bottom surface of the stirring frame 52. Therefore, when air is transmitted from the dust removal chamber 14 to the second cavity 22, it is discharged through the air holes on the stirring frame 52. At this time, the connecting shaft 2 is in a rotating state. Thus, the stirring frame 52 can both stir the limestone solution inside the box 1 and stir the solution itself, preventing the solution near the exhaust gas from becoming saturated due to continuous exhaust gas, which would affect the subsequent spraying effect.

[0036] In the above structure, since the gas transmission pipe 51 is located at the top center of the dust removal chamber 14 and its bottom end is located below the connection between the flue gas inlet pipe 11 and the dust removal chamber 14, the flue gas will rotate around the inside of the dust removal chamber 14 after entering it, thereby achieving the effect of cyclone dust removal. That is, the centrifugal force is used to throw the particulate impurities in the flue gas into the dust removal chamber 14, causing them to fall down along the inner wall of the dust removal chamber 14, and finally completing the separation of gas and solid. This makes the air subsequently discharged into the desulfurization chamber 13 relatively cleaner, avoiding the rapid deactivation of limestone solution due to excessive impurities, which would affect its absorption effect.

[0037] At the bottom of the dust removal chamber 14, there is also a dust discharge port with a dust hopper 7 installed at the bottom, which facilitates the staff to regularly collect and process the dust and impurities in the flue gas.

[0038] The spray assembly 4 includes a water pump 43 installed on the side wall of the tank 1. The water inlet of the water pump 43 is connected to the water tank storing limestone solution via a water pipe. At the same time, a branch pipe can be branched off from the water pipe to connect with the interior of the desulfurization chamber 13 to recover the limestone solution stored inside the tank 1. A filter screen is arranged at the connection between the two.

[0039] The top of the water pump 43 is connected to a water supply pipe 44, which extends along the side wall of the housing 1 to the top of the housing 1 and is vertically inserted into the center of the top surface of the connecting shaft 2, thereby injecting limestone solution into the first cavity 21. A cross-shaped mounting bracket 41 is also arranged on the outer side wall of the connecting seat. The mounting bracket 41 is hollow inside and communicates with the first cavity 21. After the external limestone solution is quickly injected into its interior, it is discharged downward through several nozzles 42 at the bottom of the mounting plate, forming a large amount of water film with the packing layer 6. The flue gas that has been preliminarily cleaned and filtered by the limestone solution at the bottom passes through the packing layer 6 again, which can effectively remove SO3 contained in the flue gas.

[0040] Moreover, due to the rotation of the connecting shaft 2, the mounting bracket 41 can effectively expand its spray range and effectively cover the Raschig rings or Pall rings inside the filler layer 6.

[0041] During the absorption process, the limestone solution reacts with SO2 and SO3 to form CaSO4, which then precipitates in the solution. The precipitate in the desulfurization chamber 13 needs to be discharged periodically. Therefore, in this embodiment, a drain pipe 15 should be installed on the outer wall of the box 1. The drain pipe 15 is connected to the inside of the desulfurization chamber 13, and a valve is installed at its connection point to facilitate the opening or closing by the staff.

[0042] In the above structure, the connecting shaft 2 needs to maintain rotation and also needs to cooperate with the water inlet pipe and the air supply pipe 51 for transportation. Therefore, a transmission wheel should be set on the outer side wall at the top of the connecting shaft 2, and a drive wheel should be set at the end of the drive motor 3. The transmission wheel and the drive wheel can be set as meshing bevel gears, or a transmission structure combined with belts.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A device for the synergistic removal of particulate matter and sulfur trioxide from flue gas, characterized in that, The enclosure includes a housing (1), which is divided into a desulfurization chamber (13) and a dust removal chamber (14) by a partition. A connecting shaft (2) is vertically installed in the desulfurization chamber (13). A drive motor (3) is installed on the top of the housing (1). The top of the connecting shaft (2) extends to the outside of the housing (1) and is connected to the drive motor (3) for transmission. A spray assembly (4), a packing layer (6) and a stirring assembly (5) are arranged sequentially from top to bottom on the connecting shaft (2). The stirring assembly (5) is connected to the dust removal chamber (14) through a gas supply pipe (51). The housing (1) is also provided with a flue gas inlet pipe (11) and a flue gas outlet pipe (12). The flue gas inlet pipe (11) is installed on the side wall of the housing (1) and is connected to the inside of the dust removal chamber (14). The flue gas outlet pipe (12) is installed on the top of the housing (1) and is connected to the desulfurization chamber (13).

2. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 1, characterized in that, The internal space of the desulfurization chamber (13) is rectangular, and the internal space of the dust removal chamber (14) is inverted conical. One end of the flue gas inlet pipe (11) is connected to the external flue, and the other end of the flue gas inlet pipe (11) extends obliquely along the inner wall of the dust removal chamber (14) and connects to the inside of the dust removal chamber (14).

3. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 1, characterized in that, The top of the connecting shaft (2) is provided with a transmission wheel on the side wall outside the housing (1), and the output end of the drive motor (3) is provided with a drive wheel and is connected to the transmission wheel.

4. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 1, characterized in that, The connecting shaft (2) has an independent first cavity (21) and a second cavity (22) inside. The first cavity (21) and the second cavity (22) extend to the upper and lower ends respectively and form openings at both ends of the connecting shaft (2). Ball bearings are provided on the inner sidewalls of the openings.

5. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 4, characterized in that, The spray assembly (4) includes a cross-shaped mounting bracket (41), which is fixedly mounted on the connecting shaft (2). The interior of the mounting bracket (41) is also hollow and communicates with the first cavity (21). Several nozzles (42) are arranged at intervals on the bottom surface of the mounting bracket (41).

6. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 5, characterized in that, A water pump (43) is also fixedly installed on the side wall of the box (1). One end of the water pump (43) extends horizontally into the inside of the box (1) and is connected to the bottom of the desulfurization chamber (13). The other end of the water pump (43) is provided with a water supply pipe (44). The water supply pipe (44) extends upward along the side wall of the box (1), and the end of the water supply pipe (44) is vertically inserted into the center of the ball bearing at the top of the connecting shaft (2) and communicates with the first cavity (21).

7. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 4, characterized in that, The stirring assembly (5) includes a stirring frame (52) fixedly installed on the side wall of the connecting shaft (2), and the interior of the stirring frame (52) is hollow and communicates with the second cavity (22), and a number of nozzles (42) are arranged on the bottom surface of the stirring frame (52).

8. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 7, characterized in that, The top of the gas supply pipe (51) is inserted into the center of the ball bearing at the bottom of the connecting shaft (2) and communicates with the second cavity (22). The other end of the gas supply pipe (51) extends vertically downward into the dust removal chamber (14) and communicates with it.

9. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 1, characterized in that, The dust removal chamber (14) is provided with a ash discharge port at the bottom, and an ash hopper (7) is connected below the ash discharge port.

10. The synergistic removal device for particulate matter and sulfur trioxide in flue gas according to claim 1, characterized in that, The bottom of the desulfurization chamber (13) is also provided with a drain pipe (15), which is equipped with a water stop valve, and the other end of the drain pipe (15) extends outward into the filter pool.

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