De-NOx flue gas bypass device

Abstract

The utility model discloses a bypass device of flue gas denitration, including flue one, flue two and bypass flue, bypass flue fixedly connected between flue one and flue two, and bypass flue is linked with flue one and flue two, the bottom of flue one is installed with guide component, the guide component includes the electric telescopic handle of flue one bottom outer wall fixed mounting, and electric telescopic handle is vertically arranged, the output fixedly connected of electric telescopic handle has guide plate, the guide plate slide -in grafting in bypass flue inside, the whole is three prism setting, and guide plate inclined plane sets up towards flue one air inlet direction, the bottom outer wall slide -in grafting of flue one has stabilizer, the utility model discloses a guide component can be realized the flow of the initiative guide flue gas, and can adjust the guide amount of flue gas at will according to the need, and simple and convenient operation provides efficient energy -conserving new path for industrial flue gas treatment.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically to a denitrification flue gas bypass device. Background Technology

[0002] During boiler start-up and shutdown or low-load operation, the flue gas temperature may be lower than the optimal activity temperature range of the denitrification catalyst. Taking a coal-fired power plant as an example, the flue gas temperature may be far below 300℃ during the initial boiler startup. If the low-temperature flue gas is directly introduced into the denitrification device at this time, not only will the denitrification efficiency be extremely low, but it may also lead to catalyst poisoning and damage, affecting its service life. Therefore, the existence of a bypass device is particularly important.

[0003] A search revealed a utility model patent with Chinese patent publication number CN222210361U, which discloses a full-load denitrification bypass flue system. The system includes a bypass flue, with its two ends connected to the flue gas output end of a pulverized coal boiler and the flue gas input end of an SCR device, respectively. A first flue gas flow regulating device is installed on the bypass flue, and a second flue gas flow regulating device is installed on the main flue between the flue gas output end of the pulverized coal boiler and the flue gas input end of the SCR device.

[0004] The aforementioned device uses two electrically adjustable dampers and an electrically closed damper to control the flow rate of flue gas in the main flue and the bypass flue. Since there are a relatively large number of regulating devices, operators need to pay attention to the status of multiple dampers and precisely control their actions when performing flow regulation tasks, which makes the operation process more complicated. Utility Model Content

[0005] The purpose of this invention is to provide a bypass device for denitrification flue gas to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a denitrification flue gas bypass device, comprising flue one, flue two, and a bypass flue. The bypass flue is fixedly connected between flue one and flue two, and is connected to both flue one and flue two. A guide assembly is installed at the bottom of flue one. The guide assembly includes an electric telescopic rod fixedly installed on the outer wall of the bottom of flue one, and the electric telescopic rod is vertically arranged. A guide plate is fixedly connected to the output end of the electric telescopic rod. The guide plate is slidably inserted into the bypass flue. The whole assembly is triangular prism shaped, and the inclined surface of the guide plate faces the air inlet direction of flue one.

[0007] It can actively guide the flow of flue gas and adjust the amount of flue gas guided as needed. It is simple and convenient to operate, providing a new efficient and energy-saving path for industrial flue gas treatment. The electric telescopic rod is activated, and the electric telescopic rod drives the guide plate to move out of the bypass flue and into flue duct one. The flue gas flowing inside flue duct one will be separated. The flue gas at the top will flow upward under the guidance of the guide plate, bypassing the denitrification equipment and entering flue duct two, thereby realizing the diversion of flue gas. If the denitrification equipment needs to be repaired, the guide plate can be driven to fully enter the interior of flue duct one, and the flow of flue gas will be completely cut off, so that the denitrification device can be safely shut down for maintenance.

[0008] As a further preferred embodiment of this technical solution, a stabilizing frame is slidably inserted into the bottom outer wall of the flue, and the top outer wall of the stabilizing frame is fixedly connected to the bottom outer wall of the guide plate.

[0009] As a further preferred embodiment of this technical solution, a maintenance assembly is installed on the outside of the bypass flue. The maintenance assembly includes a mounting bracket fixedly connected to the outer wall of one end of the bypass flue, a movable bracket slidably sleeved on the outside of the mounting bracket, a vertically arranged sealing plate fixedly connected to the outer wall of one end of the movable bracket, and a maintenance port adapted to the sealing plate is opened at the other end of the bypass flue.

[0010] As a further preferred embodiment of this technical solution, a horizontally arranged lead screw is rotatably connected inside the mounting frame. The lead screw is threaded inside the movable frame. A motor is fixedly installed on the outer wall of one end of the mounting frame, and the output end of the motor is coaxially fixed with one end of the lead screw.

[0011] If the guide plate needs to be inspected or impurities inside the bypass flue need to be cleaned, start the motor on the outside of the mounting bracket. The motor drives the lead screw to rotate, and the lead screw drives the movable bracket connected to it to move along the mounting bracket toward the bypass flue. The movable bracket moves the sealing plate away from the bypass flue, so that the maintenance port on the outside of the bypass flue, which was originally blocked by the sealing plate, is connected to the outside, and the staff can easily enter to carry out the operation.

[0012] As a further preferred embodiment of this technical solution, a sealing frame is fixedly connected to the bottom outer wall of the flue, and the output end of the electric telescopic rod and the four sliding rods of the stabilizing frame are all slidably inserted into the sealing frame, and a sealing ring is provided inside the sliding groove of the sealing frame.

[0013] As a further preferred embodiment of this technical solution, the inclined surface of the guide plate is arranged in an arc shape.

[0014] As a further preferred embodiment of this technical solution, the inner walls of the bypass flue and the surface of the guide plate are all provided with a ceramic coating, and the outer walls of the bypass flue are provided with an anti-rust coating.

[0015] This utility model provides a bypass device for denitrification flue gas, which has the following beneficial effects:

[0016] (1) By setting up a guide component, this utility model can actively guide the flow of flue gas and adjust the amount of flue gas guided as needed. It is simple and convenient to operate and provides a new path for efficient and energy-saving industrial flue gas treatment. When the electric telescopic rod is started, the electric telescopic rod drives the guide plate to move out of the bypass flue and into flue one. The flue gas flowing inside flue one will be separated. The flue gas at the top will flow upward under the guidance of the guide plate, bypass the denitrification equipment and enter flue two, thereby realizing the diversion of flue gas. If the denitrification equipment needs to be repaired, the guide plate can be driven to fully enter the interior of flue one, and the flow of flue gas will be completely cut off, so that the denitrification device can be safely shut down for maintenance.

[0017] (2) By setting up maintenance components, if it is necessary to maintain the guide plate or clean the impurities inside the bypass flue, start the motor on the outside of the mounting frame. The motor drives the lead screw to rotate, and the lead screw can drive the movable frame connected to it to move closer to the bypass flue along the mounting frame. The movable frame drives the sealing plate away from the bypass flue, so that the maintenance port opened on the outside of the bypass flue, which was originally blocked by the sealing plate, is connected to the outside, and the staff can easily enter to carry out the operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall third-view structure of this utility model;

[0021] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A;

[0022] In the diagram: 1. Flue 1; 2. Flue 2; 3. Bypass flue; 4. Guiding assembly; 5. Maintenance assembly; 401. Electric telescopic rod; 402. Guide plate; 403. Stabilizer; 404. Sealing frame; 501. Inspection port; 502. Mounting frame; 503. Moving frame; 504. Lead screw; 505. Motor; 506. Sealing plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a technical solution: such as Figure 2 and Figure 3As shown, in this embodiment, the denitrification flue gas bypass device includes flue 1, flue 2, and bypass flue 3. The bypass flue 3 is fixedly connected between flue 1 and flue 2, and is connected to flue 1 and flue 2. A guide component 4 is installed at the bottom of flue 1. The guide component 4 includes an electric telescopic rod 401 fixedly installed on the outer wall of the bottom of flue 1. The electric telescopic rod 401 is vertically arranged. A guide plate 402 is fixedly connected to the output end of the electric telescopic rod 401. The guide plate 402 is slidably inserted into the inside of the bypass flue 3. The guide plate 402 is generally triangular prism-shaped, and the inclined surface of the guide plate 402 faces the air intake direction of flue 1.

[0025] A stabilizing frame 403 is slidably inserted into the bottom outer wall of flue 1. The top outer wall of the stabilizing frame 403 is fixedly connected to the bottom outer wall of the guide plate 402. With the cooperation of the stabilizing frame 403, the guide plate 402 can move stably.

[0026] When the electric telescopic rod 401 is activated, it drives the guide plate 402 to move out of the bypass flue 3 and into flue 1. The flue gas flowing inside flue 1 will be separated. The flue gas at the top will flow upward under the guidance of the guide plate 402, bypassing the denitrification equipment and entering flue 2, thereby achieving flue gas diversion. If the denitrification equipment needs to be repaired, the guide plate 402 can be driven to fully enter the interior of flue 1, and the flue gas flow will be completely cut off, allowing the denitrification device to be safely shut down for maintenance.

[0027] like Figure 2 and Figure 4 As shown, an inspection component 5 is installed on the outside of the bypass flue 3. The inspection component 5 includes a mounting bracket 502 fixedly connected to the outer wall of one end of the bypass flue 3. A movable bracket 503 is slidably sleeved on the outside of the mounting bracket 502. A vertically arranged sealing plate 506 is fixedly connected to the outer wall of one end of the movable bracket 503. An inspection port 501 adapted to the sealing plate 506 is opened at the other end of the bypass flue 3.

[0028] The mounting bracket 502 is internally rotatably connected to a horizontally arranged lead screw 504, which is threaded into the interior of the movable bracket 503. A motor 505 is fixedly mounted on the outer wall of one end of the mounting bracket 502, and the output end of the motor 505 is coaxially fixed with one end of the lead screw 504.

[0029] If it is necessary to inspect or clean the impurities inside the bypass flue 3, start the motor 505 on the outside of the mounting bracket 502. The motor 505 drives the lead screw 504 to rotate, and the lead screw 504 drives the movable bracket 503 connected to it to move along the mounting bracket 502 toward the bypass flue 3. The movable bracket 503 moves the sealing plate 506 away from the bypass flue 3, so that the inspection port 501 on the outside of the bypass flue 3, which was originally blocked by the sealing plate 506, is connected to the outside, and the staff can easily enter to carry out the operation.

[0030] like Figure 3 As shown, a sealing frame 404 is fixedly connected to the bottom outer wall of flue 1. The output end of the electric telescopic rod 401 and the four sliding rods of the stabilizer 403 are all slidably inserted into the sealing frame 404. The sliding groove of the sealing frame 404 is equipped with a sealing ring, which can prevent the flue gas from escaping outward through the connection between the electric telescopic rod 401 and the stabilizer 403 and flue 1, without affecting normal movement.

[0031] like Figure 3 As shown, the inclined surface of the guide plate 402 is set in an arc shape, which makes the flow of flue gas smooth enough and avoids the formation of eddies.

[0032] like Figure 2 and Figure 3 As shown, the inner walls of the bypass flue 3 and the surface of the guide plate 402 are all provided with a ceramic coating, which can prevent the flue gas from corroding the bypass flue 3 and reducing its service life. The outer walls of the bypass flue 3 are provided with an anti-rust coating.

[0033] This utility model provides a bypass device for denitrification flue gas, the specific working principle of which is as follows:

[0034] When the device is working, during boiler start-up and shutdown or low-load operation, if the external temperature sensor (K-type thermocouple temperature sensor) detects a low temperature, it can control the electric telescopic rod 401 to start. The electric telescopic rod 401 drives the guide plate 402 to move out of the bypass flue 3 and into flue 1. The flue gas flowing inside flue 1 will be separated. The flue gas at the top will flow upward under the guidance of the guide plate 402, bypassing the denitrification equipment and entering flue 2, thereby achieving flue gas diversion. If the denitrification equipment needs to be repaired, the guide plate 402 can be driven to fully enter the interior of flue 1, and the flue gas flow will be completely cut off, so that the denitrification device can be safely shut down for maintenance. With the cooperation of the stabilizer 403, the guide plate 402 can move stably. If it is necessary to inspect or clean the impurities inside the bypass flue 3, start the motor 505 on the outside of the mounting bracket 502. The motor 505 drives the lead screw 504 to rotate, and the lead screw 504 drives the movable bracket 503 connected to it to move along the mounting bracket 502 toward the bypass flue 3. The movable bracket 503 moves the sealing plate 506 away from the bypass flue 3, so that the inspection port 501 on the outside of the bypass flue 3, which was originally blocked by the sealing plate 506, is connected to the outside, and the staff can easily enter to carry out the operation.

[0035] 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 denitrification flue gas bypass device, comprising flue one (1), flue two (2) and bypass flue (3), characterized in that: The bypass flue (3) is fixedly connected between flue one (1) and flue two (2), and the bypass flue (3) is connected to flue one (1) and flue two (2). A guide component (4) is installed at the bottom of flue one (1). The guide component (4) includes an electric telescopic rod (401) fixedly installed on the outer wall of the bottom of flue one (1). The electric telescopic rod (401) is vertically arranged. A guide plate (402) is fixedly connected to the output end of the electric telescopic rod (401). The guide plate (402) is slidably inserted into the bypass flue (3). The (402) is set in a triangular prism shape, and the inclined surface of the guide plate (402) is set towards the air intake direction of flue one (1).

2. The denitrification flue gas bypass device according to claim 1, characterized in that: A stabilizing frame (403) is slidably inserted into the bottom outer wall of the flue (1), and the top outer wall of the stabilizing frame (403) is fixedly connected to the bottom outer wall of the guide plate (402).

3. The denitrification flue gas bypass device according to claim 1, characterized in that: The bypass flue (3) is equipped with an inspection component (5). The inspection component (5) includes a mounting bracket (502) fixedly connected to the outer wall of one end of the bypass flue (3). A movable bracket (503) is slidably sleeved on the outside of the mounting bracket (502). A vertically arranged sealing plate (506) is fixedly connected to the outer wall of one end of the movable bracket (503). An inspection port (501) adapted to the sealing plate (506) is opened at the other end of the bypass flue (3).

4. The denitrification flue gas bypass device according to claim 3, characterized in that: The mounting bracket (502) is rotatably connected to a horizontally arranged lead screw (504), which is threadedly connected to the inside of the movable frame (503). A motor (505) is fixedly installed on the outer wall of one end of the mounting bracket (502), and the output end of the motor (505) is coaxially fixed with one end of the lead screw (504).

5. The denitrification flue gas bypass device according to claim 1, characterized in that: A sealing frame (404) is fixedly connected to the bottom outer wall of the flue (1). The output end of the electric telescopic rod (401) and the four slide rods of the stabilizer (403) are all slidably inserted into the sealing frame (404), and a sealing ring is provided inside the sliding groove of the sealing frame (404).

6. The denitrification flue gas bypass device according to claim 1, characterized in that: The inclined surface of the guide plate (402) is set in an arc shape.

7. The denitrification flue gas bypass device according to claim 1, characterized in that: The inner walls of the bypass flue (3) and the surface of the guide plate (402) are all provided with ceramic coating, and the outer walls of the bypass flue (3) are provided with anti-rust coating.

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