Flue gas denitration device

Abstract

The utility model discloses a flue gas denitration device, which comprises a conveying component, a denitration component and a denitration component, the conveying component comprises a first conveying pipe, one end of the first conveying pipe is provided with a venturi tube, the venturi tube is provided with a first inlet and a second inlet, and the first conveying pipe is communicated with the first inlet; the catalytic component is arranged on one side of the Venturi tube, and one end of the catalytic component is communicated with the second inlet; the reaction component is connected with an outlet of the Venturi tube; the exhaust part is arranged on one side of the reaction part; according to the utility model, the Venturi tube is matched with the reaction component, so that the flue gas and the catalytic medium are contacted in the Venturi tube and are primarily mixed, the mixed flue gas and the catalytic medium enter the reaction component and are subjected to chemical reaction, and in the reaction process, the reaction component further mixes the flue gas and the catalytic medium; therefore, the condition of concentrated accumulation of flue gas and catalytic media is reduced, and the denitration efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas denitration device. Background Art

[0002] During the production processes in fields such as electric power, iron and steel, and chemical industry, flue gas containing a large amount of nitrogen oxides is usually generated. To protect the environment and human health, it is usually necessary to carry out denitration treatment on the flue gas to reduce the emission of nitrogen oxides.

[0003] In the actual treatment process, when the flue gas enters the denitration device, it is relatively concentrated, and it is difficult for the catalytic medium in the denitration device to be fully mixed and reacted with the flue gas, thus affecting the denitration efficiency. Therefore, this application particularly proposes a flue gas denitration device that can fully mix the flue gas with the catalyst. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a flue gas denitration device that can fully mix the flue gas with the catalyst.

[0005] To achieve the above purpose, the utility model provides a flue gas denitration device, including:

[0006] A conveying component, including a first conveying pipe for conveying flue gas. One end of the first conveying pipe is provided with a Venturi tube. The Venturi tube is respectively provided with a first inlet and a second inlet communicating with the converging tube section in the Venturi tube, and the outlet of the first conveying pipe is communicated with the first inlet of the Venturi tube;

[0007] A catalytic component, arranged on one side of the Venturi tube, and one end of the catalytic component is communicated with the second inlet of the Venturi tube. The catalytic component is used for conveying the catalytic medium into the Venturi tube;

[0008] A reaction component, connected to the outlet of the Venturi tube. The reaction component is used for promoting the reaction between the flue gas and the catalytic medium;

[0009] An exhaust component, arranged on one side of the reaction component, for exhausting the flue gas in the reaction component.

[0010] Further, the reaction component includes a furnace connected to the outlet of the Venturi tube. The furnace is used for providing a reaction temperature environment for the catalytic medium. A first stirring rod is vertically arranged in the furnace. A plurality of stirring blades are distributed on the first stirring rod. The first stirring rod is used for stirring the flue gas and the catalytic medium in the furnace. A first power unit is arranged below the furnace. The output end of the first power unit passes through the bottom end of the furnace and is connected to the first stirring rod. The connection part between the first power unit and the furnace is a dynamic seal connection. The first power unit is used for driving the first stirring rod to rotate.

[0011] Furthermore, the catalytic component includes a storage tank arranged on one side of the Venturi tube. The storage tank is used for storing a catalytic medium. A second delivery pipe is also provided between the storage tank and the Venturi tube. The inlet of the second delivery pipe communicates with the storage tank, and the outlet of the second delivery pipe communicates with the second inlet. The second delivery pipe is used for delivering the catalytic medium into the Venturi tube.

[0012] Furthermore, it is characterized in that a first storage bin and a second storage bin are formed in the storage tank, and the second storage bin is arranged below the first storage bin. The above-mentioned catalytic medium is stored in the second storage bin, and a dilution medium for diluting the concentration of the catalytic medium is stored in the first storage bin;

[0013] A stirring component is provided in the storage tank. The stirring component includes a second stirring rod arranged in the second storage bin. The second stirring rod is immersed in the catalytic medium. The second stirring rod is used for agitating the catalytic medium in the second storage bin. A second power unit is also provided on one side of the storage tank. The moving end of the second power unit extends into the second storage bin and is connected to the second stirring rod. The connection between the second power unit and the second storage bin is a dynamic seal connection. The second power unit is used for driving the second stirring rod to rotate. It also includes a control component arranged between the first storage bin and the second storage bin. The control component is used for controlling the on-off between the first storage bin and the second storage bin.

[0014] Furthermore, the control component includes a water delivery pipe arranged at the top end of the second storage bin. The water inlet of the water delivery pipe communicates with the bottom of the first storage bin. The water outlet of the water delivery pipe is aligned with the catalytic medium in the second storage bin. A stop valve is provided on the water delivery pipe. The stop valve is used for controlling the on-off of the water delivery pipe. It also includes a detection unit arranged in the second storage bin. The detection unit is used for detecting the concentration of the catalytic medium, and the detection unit is in signal connection with the stop valve. The detection unit is used for controlling the on-off of the stop valve.

[0015] Furthermore, the exhaust component includes a third delivery pipe vertically arranged at the top of the furnace chamber. A plurality of air guiding strips are provided in the third delivery pipe, and each of the air guiding strips is spirally distributed on the inner wall of the third delivery pipe. When the flue gas enters the third delivery pipe, each of the air guiding strips guides the flue gas and the catalytic medium to be spirally conveyed in the third delivery pipe. A blower is also provided at the outlet of the third delivery pipe. The blower is used for guiding the flue gas and the catalytic medium to flow towards the outlet direction of the third delivery pipe.

[0016] The beneficial effects of the present utility model are embodied in:

[0017] In this utility model, through the cooperation of the Venturi tube and the reaction component, the flue gas and the catalytic medium come into contact and are initially mixed inside the Venturi tube. The mixed flue gas and catalytic medium enter the reaction component and undergo a chemical reaction. During the reaction process, the reaction component further mixes the flue gas and the catalytic medium, thereby reducing the situation of concentrated accumulation of the flue gas and the catalytic medium and improving the denitrification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional view of the front of a flue gas denitrification device according to this utility model;

[0019] Figure 2 is a cross-sectional view of the reaction component;

[0020] Figure 3 is a cross-sectional view of the stirring component.

[0021] Description of the reference numerals:

[0022] 1. Conveying component; 11. First conveying pipe; 12. Venturi tube; 121. First inlet; 122. Second inlet; 123. Converging pipe section; 2. Catalytic component; 21. Storage tank; 211. First storage bin; 212. Second storage bin; 22. Second conveying pipe; 3. Reaction component; 31. Furnace; 32. First stirring rod; 321. Stirring blade; 33. First power unit; 4. Exhaust component; 41. Third conveying pipe; 42. Air guiding strip; 43. Fan; 5. Stirring component; 51. Second stirring rod; 52. Second power unit; 53. Control assembly; 531. Water supply pipe; 532. Stop valve; 533. Detection unit. SPECIFIC EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all of the embodiments. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0024] See Figures 1-3 。

[0025] This utility model discloses a flue gas denitrification device, including:

[0026] A conveying component 1, including a first conveying pipe 11 for conveying flue gas. One end of the first conveying pipe 11 is provided with a Venturi tube 12. The Venturi tube 12 is respectively provided with a first inlet 121 and a second inlet 122 communicated with the converging pipe section 123 inside the Venturi tube 12, and the outlet of the first conveying pipe 11 is communicated with the first inlet 121 of the Venturi tube 12;

[0027] The catalytic component 2 is arranged on one side of the Venturi tube 12, and one end of the catalytic component 2 is communicated with the second inlet 122 of the Venturi tube 12. The catalytic component 2 is used for conveying the catalytic medium into the Venturi tube 12;

[0028] The reaction component 3 is connected to the outlet of the Venturi tube 12. The reaction component 3 is used for promoting the reaction between the flue gas and the catalytic medium;

[0029] The exhaust component 4 is arranged on one side of the reaction component 3 and is used for discharging the flue gas in the reaction component 3.

[0030] In a specific implementation, the flue gas filtered by impurities is first conveyed into the first conveying pipe 11. The flue gas enters the Venturi tube 12 through the first conveying pipe 11 and flows towards the catalytic component 2. When the flue gas passes through the converging pipe section 123, the flow rate of the flue gas increases. At this time, the negative pressure generated by the flow of the flue gas conveys the catalytic medium in the catalytic component 2 into the converging pipe section 123 of the Venturi tube 12. At this time, the flue gas contacts the catalytic medium and is compressed in the Venturi tube 12. When the flue gas carrying the catalytic medium moves to the outlet of the Venturi tube 12, the flue gas and the catalytic medium disperse from each other. At this time, the flow rate and pressure of the flue gas and the catalytic medium both decrease to a predetermined value. During the dispersion process, the flue gas and the catalytic medium are in full contact. At this time, the catalytic medium reacts with the flue gas in the reaction component 3. While promoting the reaction between the catalytic medium and the flue gas, the reaction component 3 further mixes the flue gas and the catalytic medium. After the reaction, the flue gas completes the denitrification process and is discharged from the exhaust component 4.

[0031] In the present utility model, through the cooperation of the Venturi tube 12 and the reaction component 3, the flue gas and the catalytic medium come into contact and are initially mixed in the Venturi tube 12. The mixed flue gas and catalytic medium enter the reaction component 3 and undergo a chemical reaction. During the reaction process, the reaction component 3 further mixes the flue gas and the catalytic medium, thereby reducing the situation of concentrated accumulation of the flue gas and the catalytic medium and improving the denitrification efficiency.

[0032] It should be noted that the Venturi tube 12 is common knowledge for those skilled in the art, so its structure and function will not be described in detail here.

[0033] Preferably, the catalytic medium can be ammonia water.

[0034] In one embodiment, the reaction component 3 includes a furnace chamber 31 connected to the outlet of the Venturi tube 12. The furnace chamber 31 is used to provide a reaction temperature environment for the catalytic medium. A first stirring rod 32 is vertically arranged in the furnace chamber 31, and a plurality of stirring blades 321 are distributed on the first stirring rod 32. The first stirring rod 32 is used to stir the flue gas and the catalytic medium in the furnace chamber 31. A first power unit 33 is arranged below the furnace chamber 31. The output end of the first power unit 33 penetrates through the bottom end of the furnace chamber 31 and is connected to the first stirring rod 32. The connection between the first power unit 33 and the furnace chamber 31 is a dynamic seal connection. The first power unit 33 is used to drive the first stirring rod 32 to rotate.

[0035] With such a design, when the flue gas and the catalytic medium enter the furnace chamber 31, the furnace chamber 31 provides a suitable temperature environment for the catalytic medium. At this time, the catalytic medium undergoes pyrolysis and generates ammonia. The ammonia reacts with the nitrogen oxides in the flue gas to produce nitrogen and water. The water evaporates due to the high temperature in the furnace chamber 31. The first power unit 33 drives the first stirring rod 32 to rotate, and the first stirring rod 32 stirs the flue gas and the catalytic medium in the furnace chamber 31, enabling the flue gas and the catalytic medium to further contact each other, thereby accelerating the process of denitrification of the flue gas.

[0036] It should be noted that a heat insulation layer can be provided between the first power unit 33 and the furnace chamber 31, so as to avoid the leakage of the high temperature in the furnace chamber 31 and at the same time play a role in protecting the first power unit 33.

[0037] Preferably, the first power unit 33 can adopt a high-temperature motor in the prior art.

[0038] In one embodiment, the catalytic component 2 includes a storage tank 21 arranged on one side of the Venturi tube 12. The storage tank 21 is used to store the catalytic medium. A second delivery pipe 22 is also arranged between the storage tank 21 and the Venturi tube 12. The inlet of the second delivery pipe 22 is communicated with the storage tank 21, and the outlet of the second delivery pipe 22 is communicated with the second inlet 122. The second delivery pipe 22 is used to deliver the catalytic medium into the Venturi tube 12.

[0039] With such a design, when the flue gas passes through the contraction section 123 of the Venturi tube 12, a negative pressure is generated in the contraction section 123. At this time, the catalytic medium is attracted by the negative pressure in the tube and flows into the second delivery pipe 22 until the catalytic medium flows from the second delivery pipe 22 into the Venturi tube 12 and mixes with the flue gas.

[0040] In one embodiment, a first storage bin 211 and a second storage bin 212 are formed in the storage tank 21, and the second storage bin 212 is arranged below the first storage bin 211. The above-mentioned catalytic medium is stored in the second storage bin 212, and a dilution medium for diluting the concentration of the catalytic medium is stored in the first storage bin 211;

[0041] The storage tank 21 is provided with a stirring component 5. The stirring component 5 includes a second stirring rod 51 disposed in the second storage bin 212. The second stirring rod 51 is immersed in the catalytic medium. The second stirring rod 51 is used to stir the catalytic medium in the second storage bin 212. A second power unit 52 is further provided on one side of the storage tank 21. The moving end of the second power unit 52 extends into the second storage bin 212 and is connected to the second stirring rod 51. The connection between the second power unit 52 and the second storage bin 212 is a dynamic seal connection. The second power unit 52 is used to drive the second stirring rod 51 to rotate. It further includes a control component 53 disposed between the first storage bin 211 and the second storage bin 212. The control component 53 is used to control the on-off between the first storage bin 211 and the second storage bin 212.

[0042] With such a design, when it is necessary to dilute the concentration of the catalytic medium, the control component 53 is used to connect the first storage bin 211 and the second storage bin 212. At this time, the dilution medium flows into the second storage bin 212. The second power unit 52 drives the second stirring rod 51 to rotate, so that the second stirring rod 51 stirs the catalytic medium and the dilution medium in the second storage bin 212, accelerating the mixing speed of the catalytic medium and the dilution medium. When the concentration of the catalytic medium reaches the specified value, the control component 53 disconnects the first storage bin 211 and the second storage bin 212, and the dilution medium no longer flows into the second storage bin 212.

[0043] It should be noted that water inlets can be opened on both the first storage bin 211 and the second storage bin 212. When it is necessary to increase the concentration of the catalytic medium, the catalytic medium can be transported into the second storage bin 212 through the water inlet on the second storage bin 212. When it is necessary to supplement the dilution medium, the dilution medium can be transported into the first storage bin 211 through the water inlet on the first storage bin 211.

[0044] Preferably, the second power unit 52 can adopt a motor in the prior art.

[0045] Preferably, the dilution medium can adopt water.

[0046] In an embodiment, the control component 53 includes a water delivery pipe 531 disposed at the top end of the second storage bin 212. The water inlet of the water delivery pipe 531 is communicated with the bottom of the first storage bin 211. The water outlet of the water delivery pipe 531 is aligned with the catalytic medium in the second storage bin 212. A stop valve 532 is provided on the water delivery pipe 531. The stop valve 532 is used to control the on-off of the water delivery pipe 531. It further includes a detection unit 533 disposed in the second storage bin 212. The detection unit 533 is used to detect the concentration of the catalytic medium, and the detection unit 533 is signal-connected to the stop valve 532. The detection unit 533 is used to control the on-off of the stop valve 532.

[0047] With such a design, when the concentration of the catalytic medium is higher than a predetermined value, the detection unit 533 sends a signal to the cut-off valve 532 to open the cut-off valve 532. At this time, the first storage bin 211 communicates with the second storage bin 212, and the dilution medium flows into the second storage bin 212 through the water delivery pipe 531. When the concentration of the catalytic medium reaches the predetermined value, the detection unit 533 no longer sends a signal to the cut-off valve 532, and the cut-off valve 532 closes. At this time, the first storage bin 211 is disconnected from the second storage bin 212.

[0048] In one embodiment, the exhaust component 4 includes a third delivery pipe 41 vertically arranged at the top of the furnace chamber 31. A plurality of air guiding strips 42 are provided in the third delivery pipe 41, and each air guiding strip 42 is spirally distributed on the inner wall of the third delivery pipe 41. When the flue gas enters the third delivery pipe 41, each air guiding strip 42 guides the flue gas and the catalytic medium to be spirally conveyed in the third delivery pipe 41. A fan 43 is further provided at the outlet of the third delivery pipe 41, and the fan 43 is used to guide the flue gas and the catalytic medium to flow towards the outlet direction of the third delivery pipe 41.

[0049] With such a design, after the flue gas and the catalytic medium react in the furnace chamber 31, the fan 43 starts and drives the flue gas and the catalytic medium in the furnace chamber 31 into the third delivery pipe 41. At this time, the air flow drives the flue gas and the catalytic medium to rotate along the spiral direction of the air guiding strip 42, so as to further mix the residual nitrogen oxides in the flue gas with the catalytic medium in the third delivery pipe 41 and further improve the denitration efficiency.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. In addition, "a plurality of", "multiple groups", and "several" mean more than two.

Claims

1. A flue gas denitrification device, characterized in that, Comprising: A conveying component (1), including a first conveying pipe (11) for conveying flue gas, one end of the first conveying pipe (11) is provided with a Venturi tube (12), the Venturi tube (12) is respectively provided with a first inlet (121) and a second inlet (122) communicating with a contraction pipe section (123) inside the Venturi tube (12), and the outlet of the first conveying pipe (11) communicates with the first inlet (121) of the Venturi tube (12); A catalytic component (2), arranged on one side of the Venturi tube (12), and one end of the catalytic component (2) communicates with the second inlet (122) of the Venturi tube (12), the catalytic component (2) is used for conveying a catalytic medium into the Venturi tube (12); A reaction component (3), connected to the outlet of the Venturi tube (12), the reaction component (3) is used for promoting the reaction between the flue gas and the catalytic medium; An exhaust component (4), arranged on one side of the reaction component (3), for exhausting the flue gas in the reaction component (3).

2. The flue gas denitration device according to claim 1, characterized in that, The reaction component (3) includes a furnace chamber (31) connected to the outlet of the Venturi tube (12), the furnace chamber (31) is used for providing a reaction temperature environment for the catalytic medium, a first stirring rod (32) is vertically arranged in the furnace chamber (for stirring the flue gas and the catalytic medium in the furnace chamber (31), a first power unit (33) is arranged below the furnace chamber (31), the output end of the first power unit (33) passes through the bottom end of the furnace chamber (31) and is connected to the first stirring rod (32), the connection part of the first power unit (33) and the furnace chamber (31) is in dynamic seal connection, and the first power unit (33) is used for driving the first stirring rod (32) to rotate.

3. The flue gas denitration device according to claim 1, wherein The catalytic component (2) includes a storage tank (21) arranged on one side of the Venturi tube (12), the storage tank (21) is used for storing the catalytic medium, a second conveying pipe (22) is further arranged between the storage tank (21) and the Venturi tube (12), the inlet of the second conveying pipe (22) communicates with the storage tank (21), the outlet of the second conveying pipe (22) communicates with the second inlet (122), and the second conveying pipe (22) is used for conveying the catalytic medium into the Venturi tube (12).

4. The flue gas denitration device according to claim 3, wherein The storage tank (21) is provided with a first storage bin (211) and a second storage bin (212), and the second storage bin (212) is arranged below the first storage bin (211), the above-mentioned catalytic medium is stored in the second storage bin (212), and a dilution medium for diluting the concentration of the catalytic medium is stored in the first storage bin (211); A stirring component (5) is provided in the storage tank (21). The stirring component (5) includes a second stirring rod (51) disposed in the second storage bin (212). The second stirring rod (51) is immersed in the catalytic medium, and the second stirring rod (51) is used to agitate the catalytic medium in the second storage bin (212). A second power unit (52) is further provided on one side of the storage tank (21). The moving end of the second power unit (52) extends into the second storage bin (212) and is connected to the second stirring rod (51). And the connection between the second power unit (52) and the second storage bin (212) is a dynamic seal connection. The second power unit (52) is used to drive the second stirring rod (51) to rotate. It further includes a control component (53) disposed between the first storage bin (211) and the second storage bin (212). The control component (53) is used to control the on-off between the first storage bin (211) and the second storage bin (212).

5. The flue gas denitration device according to claim 4, characterized in that, The control component (53) includes a water delivery pipe (531) disposed at the top of the second storage bin (212). The water inlet of the water delivery pipe (531) is communicated with the bottom of the first storage bin (211). The water outlet of the water delivery pipe (531) is aligned with the catalytic medium in the second storage bin (212). A stop valve (532) is provided on the water delivery pipe (531). The stop valve (532) is used to control the on-off of the water delivery pipe (531). It further includes a detection unit (533) disposed in the second storage bin (212). The detection unit (533) is used to detect the concentration of the catalytic medium, and the detection unit (533) is signal-connected to the stop valve (532). The detection unit (533) is used to control the on-off of the stop valve (532).

6. The flue gas denitration device according to claim 2, characterized in that, The exhaust component (4) includes a third delivery pipe (41) vertically disposed at the top of the furnace chamber (31). A plurality of air guiding strips (42) are provided in the third delivery pipe (41), and each of the air guiding strips (42) is spirally distributed on the inner wall of the third delivery pipe (41). When the flue gas enters the third delivery pipe (41), each of the air guiding strips (42) guides the flue gas and the catalytic medium to be spirally conveyed in the third delivery pipe (41). A blower (43) is further provided at the outlet of the third delivery pipe (41). The blower (43) is used to guide the flue gas and the catalytic medium to flow in the direction of the outlet of the third delivery pipe (41).

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