Ammonia slip control apparatus and control method for a polymer denitration system

Abstract

The application provides a kind of high molecular denitration system ammonia escape control equipment and control method, it is related to the technical field of removing nitrogen oxides in flue gas.The method applies the equipment, the equipment includes: denitration reactor, with the flue gas inlet pipe and the flue gas outlet pipe, the flue gas inlet pipe and the flue gas outlet pipe are sequentially provided with spray grid and reaction zone;Agent pipeline is connected with the spray grid;Adjusting mechanism;Ammonia escape detection mechanism is used to detect the ammonia escape in the flue gas outlet pipe;Control mechanism is used to control the adjusting mechanism according to the detection result of the ammonia escape detection mechanism, to adjust the flow size in the agent pipeline.When ammonia escape detection mechanism detects that the ammonia content in the flue gas outlet pipe is higher than the preset threshold, the flow in the agent pipeline is reduced by controlling the adjusting mechanism through the control mechanism, the ammonia escape is reduced, and the blockage and corrosion of the denitration reactor and downstream equipment caused by the generation of ammonium bisulfate due to water vapor, SO3 and ammonia escape in flue gas are avoided.

Description

Technical Field

[0001] This invention relates to the field of nitrogen oxide removal technology in flue gas, and in particular to an ammonia escape control device and control method for a polymer denitrification system. Background Technology

[0002] Polymer denitrification technology uses polymer materials (containing amino groups) as denitrification agents. The polymer denitrification system includes a denitrification reactor. Under the high temperature inside the denitrification reactor, the chemical bonds connecting amino groups and polymers break, releasing a large number of amino-containing energy groups. These amino energy groups react chemically with nitrogen oxides in flue gas, catalytically reducing NOx to N2 and H2O, thereby achieving the purpose of denitrification.

[0003] When the amount of polymeric denitrifying agent injected into the denitrification reactor is excessive, the ammonia produced by the agent cannot mix evenly with the flue gas, resulting in a relative excess of ammonia and thus ammonia escape. Ammonia escape affects the safe and stable operation of the unit, mainly because water vapor, SO3, and ammonia escape from the flue gas, which under certain conditions can generate ammonium bisulfate. Ammonium bisulfate is a highly viscous and corrosive substance in its liquid state, causing blockage and corrosion to the denitrification reactor and downstream equipment.

[0004] Therefore, measures need to be taken to control ammonia escape from polymer denitrification systems. Summary of the Invention

[0005] In view of the above situation, the present invention provides an ammonia slip control device and control method for a polymer denitrification system, which aims to reduce ammonia slip and avoid blockage and corrosion of the denitrification reactor and downstream equipment caused by the formation of ammonium bisulfate from water vapor, SO3 and ammonia in flue gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] In a first aspect, the present invention provides an ammonia slip control device for a polymer denitrification system, comprising:

[0008] A denitrification reactor has an inlet pipe and an outlet pipe, and a spray grid and a reaction zone are arranged sequentially between the inlet pipe and the outlet pipe. The spray grid is used to uniformly spray a polymeric denitrification agent into the reaction zone.

[0009] The infusion pipeline is connected to the spray grid;

[0010] Adjustment mechanism;

[0011] An ammonia escape detection mechanism is used to detect ammonia escape within the exhaust pipe.

[0012] A control mechanism is used to control the regulating mechanism based on the detection result of the ammonia escape detection mechanism, so as to regulate the flow rate in the infusion pipeline.

[0013] In some embodiments of the present invention, the ammonia escape detection mechanism includes an ammonia content sensor.

[0014] In some embodiments of the present invention, the ammonia escape detection mechanism further includes:

[0015] A fixed pipe is installed inside the exhaust pipe;

[0016] A movable tube is rotatably fitted onto the right end of the fixed tube, and the movable tube can slide left and right.

[0017] Multiple second suction heads are arranged radially along the movable tube, and each second suction head can reciprocate radially along the movable tube when the movable tube slides left and right;

[0018] A detection column is installed outside the exhaust pipe. The side wall of the detection column is provided with air inlets and outlets at intervals. The air inlets are connected to the left end of the fixed pipe. The ammonia content sensor is installed inside the detection column.

[0019] In some embodiments of the present invention, the ammonia escape detection mechanism further includes:

[0020] The fan blades are fixed to the outer wall of the movable tube.

[0021] A fixed plate is fixed to the fixed tube and located on the left side of the movable tube; the right side of the fixed plate has several arc-shaped grooves, the beginning and end of the arc-shaped grooves are not connected, and the bottom of the arc-shaped grooves has a predetermined slope.

[0022] A movable disc is connected to the left end of the movable tube. A transmission block is provided on the left side of the movable disc. The left end of the transmission block can slide in contact with the right side of the fixed disc or slide in contact with the bottom of the arc-shaped groove.

[0023] In some embodiments of the present invention, the ammonia escape detection mechanism further includes a first suction head, which is connected to the right end of the active tube.

[0024] In some embodiments of the present invention, the ammonia escape detection mechanism further includes a first branch pipe and a second branch pipe; the first branch pipe is connected to the first suction head, and the second branch pipe is connected to the second suction head; the first branch pipe is connected to the right side wall of the movable pipe; the first branch pipe and the second branch pipe are inserted into each other, and any two adjacent second branch pipes are inserted into each other.

[0025] In some embodiments of the present invention, the ammonia escape detection mechanism further includes a connecting rod, one end of which is hinged to the movable tube and the other end of which is hinged to the second branch tube.

[0026] In some embodiments of the present invention, the ammonia escape detection mechanism further includes:

[0027] The movable plug slides longitudinally within the detection column;

[0028] The transmission rod has one end connected to the movable plug and the other end sliding through the detection column and then making sliding contact with the outer wall of the movable tube; several convex rings are distributed along the axial direction on the outer wall of the movable tube;

[0029] A rotating ring is provided, with an annular groove on the inner wall of the detection column, and the rotating ring is rotatably connected in the annular groove; the rotating ring has an air inlet and an air outlet, when the air inlet is aligned and connected with the air inlet hole, the air outlet is misaligned with the air outlet hole; when the air inlet is misaligned with the air inlet hole, the air outlet is aligned and connected with the air outlet hole.

[0030] In some embodiments of the present invention, the ammonia escape detection mechanism further includes:

[0031] A wedge-shaped block is located inside the detection column and connected to the transmission rod;

[0032] A guide plate is disposed on the inner wall of the detection column;

[0033] The push rod has its middle part slidably connected to the guide plate; the left end of the push rod can slide in contact with the wedge block, and the right end can slide in contact with the bottom of the guide groove.

[0034] A guide groove is located inside the rotating ring; the bottom of the guide groove has a predetermined slope.

[0035] A spring is used to reset the rotating ring after rotation.

[0036] Secondly, the present invention provides a method for controlling ammonia slip in a polymer denitrification system, comprising:

[0037] Adjust the positions of the first and second suction heads to draw in smoke from multiple locations within the exhaust pipe;

[0038] The collected flue gas is mixed and guided into the detection column to contact the ammonia content sensor for detection; the detected flue gas is then promptly discharged from the detection column.

[0039] The control mechanism adjusts the flow rate in the infusion pipeline based on the detection results of the ammonia content sensor.

[0040] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0041] When the ammonia escape detection device detects that the ammonia content in the flue gas pipe is higher than the preset threshold, it indicates that there is a relative excess of ammonia in the denitrification reactor and the ammonia escape situation is serious. By controlling the regulating mechanism to reduce the flow rate in the delivery pipeline, the amount of ammonia in the denitrification reactor is reduced, thereby alleviating the relative excess of ammonia, reducing ammonia escape, and avoiding the formation of ammonium bisulfate due to water vapor, SO3 and ammonia escape in the flue gas, which would cause blockage and corrosion to the denitrification reactor and downstream equipment.

[0042] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 A schematic diagram of the ammonia slip control device in a polymer denitrification system;

[0045] Figure 2 This is a schematic diagram of the ammonia escape detection mechanism;

[0046] Figure 3 A schematic diagram of an arc-shaped groove whose ends are not connected.

[0047] Figure 4 A schematic diagram of the movable piston, transmission rod, and rotating ring;

[0048] Figure 5 for Figure 4 A sectional view along direction AA.

[0049] icon:

[0050] 1-Denitrification reactor, 11-Inlet pipe, 12-Exhaust pipe, 13-Injector grid, 14-Reaction zone

[0051] 2-Infusion pipeline,

[0052] 31-Flow regulating valve,

[0053] 4-Ammonia escape detection mechanism; 41-Ammonia content sensor; 42-Fixed tube; 43-Moving tube; 44-First suction head; 45-Second suction head; 46-Detection column; 461-Inlet port; 462-Outlet port; 463-Conduit tube.

[0054] 47-Fan blade, 48-Fixed disc, 481-Arc groove, 49-Moving disc, 491-Transmission block,

[0055] 51-First branch pipe, 52-Second branch pipe, 53-Connecting rod,

[0056] 54-Moving plug, 55-Drive rod, 56-Rotating ring, 561-Intake port, 562-Exhaust port, 57-Protruding ring, 58-Annular groove

[0057] 59-Wedge block, 61-Guide plate, 62-Push rod, 63-Guide groove, 64-Spring. Detailed Implementation

[0058] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention.

[0059] In the description of the embodiments of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "upper", "lower", "left", "right", "bottom", "inner", "outer", "counterclockwise", "axial", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of the present invention 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. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] "Several" means one or more, unless otherwise explicitly specified.

[0062] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0063] The embodiments of the present invention will be described in detail below.

[0064] Example

[0065] Firstly, see [the following] Figures 1-5 This embodiment provides an ammonia slip control device for a polymer denitrification system, including a denitrification reactor 1, a delivery pipeline 2, a regulating mechanism, an ammonia slip detection mechanism 4, and a control mechanism (not shown in the figure).

[0066] The denitrification reactor 1 has a flue gas inlet pipe 11 and a flue gas outlet pipe 12. A spray grid 13 and a reaction zone 14 are arranged sequentially between the flue gas inlet pipe 11 and the flue gas outlet pipe 12. The spray grid 13 is used to uniformly spray a polymer denitrification agent into the reaction zone 14 so that the polymer denitrification agent is mixed evenly with the flue gas.

[0067] The infusion pipeline 2 is connected to the spray grid 13.

[0068] The regulating mechanism is used to regulate the flow rate in the infusion pipeline 2.

[0069] The ammonia escape detection mechanism 4 is used to detect ammonia escape in the flue pipe 12, that is, to detect the ammonia content in the flue pipe 12.

[0070] The control mechanism is used to control the regulating mechanism based on the detection results of the ammonia escape detection mechanism 4, so as to regulate the flow rate in the infusion pipeline 2.

[0071] When the ammonia escape detection mechanism 4 detects that the ammonia content in the flue gas pipe 12 is higher than the preset threshold, it indicates that there is a relative excess of ammonia in the denitrification reactor 1 and the ammonia escape is serious. The control mechanism controls the regulating mechanism to reduce the flow rate in the delivery pipeline 2, thereby reducing the amount of ammonia in the denitrification reactor 1, thus alleviating the relative excess of ammonia, reducing ammonia escape, and avoiding the formation of ammonium bisulfate due to water vapor, SO3 and ammonia escape in the flue gas, which would cause blockage and corrosion to the denitrification reactor 1 and downstream equipment.

[0072] The regulating mechanism includes a flow regulating valve 31; the ammonia escape detection mechanism 4 includes an ammonia content sensor 41; and the control mechanism includes a controller. The output terminal of the ammonia content sensor 41 is electrically connected to the input terminal of the controller, and the output terminal of the controller is electrically connected to the control terminal of the flow regulating valve 31. When the ammonia content sensor 41 detects that the ammonia content in the flue pipe 12 is higher than a preset threshold, the opening of the flow regulating valve 31 is reduced to decrease the flow rate in the delivery pipeline 2.

[0073] In this embodiment, the ammonia escape detection mechanism 4 also includes a fixed tube 42, a movable tube 43, a first suction head 44, a second suction head 45, and a detection column 46.

[0074] The fixed pipe 42 is set in a fixed position inside the smoke exhaust pipe 12 by a support plate. Preferably, the fixed pipe 42 is coaxially arranged with the smoke exhaust pipe 12.

[0075] The movable tube 43 is rotatably sleeved on the right end of the fixed tube 42, and the movable tube 43 can slide left and right. The movable tube 43 is connected to the fixed tube 42.

[0076] The first suction head 44 is connected to the right end of the active tube 43.

[0077] Multiple second suction heads 45 are arranged radially along the movable tube 43, and each second suction head 45 can reciprocate radially along the movable tube 43 when the movable tube 43 slides left and right.

[0078] The detection column 46 is located outside the exhaust pipe 12. The side wall of the detection column 46 is provided with an air inlet 461 and an air outlet 462 at intervals. The air inlet 461 is connected to the left end of the fixed pipe 42 through a conduit 463. The ammonia content sensor 41 is located inside the detection column 46.

[0079] The working principle of the ammonia escape detection mechanism 4 is as follows: by rotating the movable tube 43, the second suction head 45 can move along a circular trajectory; by sliding the movable tube 43 left and right, the second suction head 45 can move back and forth along the radial direction of the movable tube 43, and the radius of the circular trajectory can be adjusted, so that the second suction head 45 can suck up the flue gas from multiple positions in the exhaust pipe 12. Under the action of the rotation of the movable tube 43, the flue gas sucked from each position is mixed evenly and then enters the detection column 46 to contact the ammonia content sensor 41. In this way, there are many sampling points and a wide coverage area. Under the premise of meeting the requirements for detecting ammonia escape, it can overcome the problem of uneven distribution of ammonia in the exhaust pipe 12 (ammonia in the exhaust pipe 12 is generally not evenly distributed), and improve the detection accuracy.

[0080] The ammonia escape detection mechanism 4 also includes a fan blade 47, a fixed plate 48, and a movable plate 49.

[0081] The fan blade 47 is fixed to the outer wall of the movable tube 43.

[0082] The fixed plate 48 is fixed to the fixed tube 42 and located on the left side of the movable tube 43; the right side of the fixed plate 48 has several arc-shaped grooves 481, the beginning and end of each arc-shaped groove 481 are not connected (e.g., Figure 3 As shown, along the circumference of the arc groove 481, the depth of the arc groove 481 gradually decreases or increases, that is, the bottom of the arc groove 481 has a predetermined slope.

[0083] The movable disc 49 is connected to the left end of the movable tube 43. A transmission block 491 is provided on the left side of the movable disc 49. The left end of the transmission block 491 can slide in contact with the right side of the fixed disc 48 or slide in contact with the bottom of the arc groove 481.

[0084] Driven by the airflow, the fan blade 47 can rotate the movable tube 43 and the movable disk 49 together; during the rotation of the movable disk 49, the left end of the transmission block 491 can first slide into contact with the bottom of the arc-shaped groove 481 (e.g., Figure 2 As shown), it slides along the bottom of the arc-shaped groove 481 to the outside of the arc-shaped groove 481 and slides into contact with the right side of the fixed plate 48, and then re-enters the arc-shaped groove 481. During the above process, the bottom of the arc-shaped groove 481 with a predetermined slope cooperates with the transmission block 491, which enables the transmission block 491 to move back and forth left and right, thereby driving the movable plate 49, the movable tube 43, the first suction head 44 and the second suction head 45 to move back and forth left and right. That is, through the arrangement of the fan blade 47, the fixed plate 48 and the movable plate 49, the left and right position adjustment of the first suction head 44 and the second suction head 45 is realized.

[0085] In this embodiment, the multiple second suction heads 45 are arranged radially along the movable tube 43 in the following manner: the ammonia escape detection mechanism 4 also includes a first branch tube 51 and a second branch tube 52; the first branch tube 51 is connected to the first suction head 44, and the second branch tube 52 is connected to the second suction head 45; the first branch tube 51 is connected to the right side wall of the movable tube 43; the first branch tube 51 and the second branch tube 52 are inserted into each other, and any two adjacent second branch tubes 52 are inserted into each other.

[0086] The ammonia escape detection mechanism 4 also includes a connecting rod 53, one end of which is hinged to the movable tube 43 and the other end of which is hinged to the second branch tube 52. In this way, during the reciprocating movement of the movable tube 43, the connecting rod 53 can drive each second branch tube 52 and the second suction tube to reciprocate radially along the movable tube 43.

[0087] To facilitate the intake of flue gas from the exhaust pipe 12 by the first intake head 44 and the second intake head 45, the ammonia escape detection mechanism 4 also includes a movable plug 54, a transmission rod 55, and a rotating ring 56.

[0088] The movable plug 54 slides longitudinally within the detection column 46.

[0089] One end of the transmission rod 55 is connected to the movable plug 54, and the other end slides through the detection column 46 and then slides into contact with the outer wall of the movable tube 43; several convex rings 57 (there may be one or more convex rings 57) are distributed along the axial direction on the outer wall of the movable tube 43, and the cross-section of the convex ring 57 is semi-circular.

[0090] The rotating ring 56 is coaxially arranged with the detection column 46. An annular groove 58 is provided on the inner wall of the detection column 46, and the rotating ring 56 is rotatably connected in the annular groove 58. The rotating ring 56 has an air inlet 561 and an exhaust outlet 562. When the air inlet 561 is aligned and connected with the air inlet 461, the exhaust outlet 562 is misaligned with the air outlet 462. When the air inlet 561 is misaligned with the air inlet 461, the exhaust outlet 562 is aligned and connected with the air outlet 462.

[0091] During the leftward movement of the movable tube 43, the transmission rod 55 is first lifted by the convex ring 57 and then falls; during the rightward movement of the movable tube 43, the transmission rod 55 is also first lifted by the convex ring 57 and then falls. That is, during the leftward and rightward movement of the movable tube 43, the transmission rod 55 and the convex ring 57 work together to drive the movable plug 54 to move up and down at least once; while the movable plug 54 moves up and down once, the rotating ring 56 rotates back and forth once, which enables the first suction head 44 and the second suction head 45 to complete one intake and exhaust process, thereby facilitating the intake of flue gas from different positions into the detection column 46 and the ammonia content sensor 41 for detection during the adjustment of the positions of the first suction head 44 and the second suction head 45.

[0092] Furthermore, in order to facilitate the reciprocating rotation of the rotating ring 56 once while the movable plug 54 moves up and down once, the ammonia escape detection mechanism 4 also includes a wedge block 59, a guide plate 61, a push rod 62, a guide groove 63, and a spring 64.

[0093] The wedge block 59 is located inside the detection column 46 and connected to the transmission rod 55.

[0094] The guide plate 61 is set on the inner wall of the detection column 46.

[0095] The middle part of the push rod 62 is laterally slidably connected to the guide plate 61; the left end of the push rod 62 can slide in contact with the wedge block 59, and the right end can slide in contact with the bottom of the guide groove 63.

[0096] The guide groove 63 is located inside the rotating ring 56. Along the length of the guide groove 63, the depth of the guide groove 63 gradually decreases or increases, that is, the bottom of the guide groove 63 has a predetermined slope.

[0097] Spring 64 is used to reset the rotating ring 56 after rotation.

[0098] When the transmission rod 55 moves upward, the wedge block 59 can push the push rod 62 to the right. The push rod 62 then applies a rightward thrust to the bottom of the guide groove 63 and generates a component force that causes the rotating ring 56 to rotate counterclockwise (e.g., Figure 5 As shown, the rotating ring 56 rotates counterclockwise to align the air inlet 561 with the air inlet 461 and to misalign the exhaust outlet 562 with the exhaust port 462, facilitating the entry of flue gas into the detection column 46 through the air inlet 561. When the transmission rod 55 moves down, the rotating ring 56 rotates in the opposite direction to reset under the restoring force of the spring 64, misaligning the air inlet 561 with the air inlet 461 and aligning the exhaust outlet 562 with the exhaust port 462, facilitating the timely discharge of the detected flue gas from the exhaust outlet 562 to the outside of the detection column 46, preventing the detected flue gas from remaining in the detection column 46 and mixing with the flue gas to be tested that subsequently enters the detection column 46, thereby improving the accuracy of the detection.

[0099] Secondly, see Figures 1-5 This embodiment provides a method for controlling ammonia slip in a polymer denitrification system, which utilizes the aforementioned ammonia slip control device for the polymer denitrification system. The method for controlling ammonia slip in a polymer denitrification system includes the following steps:

[0100] Step S1: Adjust the position of the first suction head 44 and the second suction head 45 to draw in smoke from multiple locations in the exhaust pipe 12;

[0101] Step S2: After mixing the flue gas, guide it into the detection column 46 to contact the ammonia content sensor 41 for detection; the detected flue gas is then discharged from the detection column 46 in a timely manner.

[0102] Step S3: The control mechanism adjusts the flow rate in the infusion pipeline 2 based on the detection result of the ammonia content sensor 41.

[0103] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ammonia slip control device for a polymer denitrification system, characterized in that, include: A denitrification reactor has an inlet pipe and an outlet pipe, and a spray grid and a reaction zone are arranged sequentially between the inlet pipe and the outlet pipe. The spray grid is used to uniformly spray a polymeric denitrification agent into the reaction zone. The infusion pipeline is connected to the spray grid; Adjustment mechanism; An ammonia escape detection mechanism is used to detect ammonia escape within the exhaust pipe. A control mechanism is used to control the regulating mechanism based on the detection result of the ammonia slip detection mechanism, so as to regulate the flow rate in the infusion pipeline; The ammonia escape detection mechanism includes an ammonia content sensor; and also includes: A fixed pipe is installed inside the exhaust pipe; A movable tube is rotatably fitted onto the right end of the fixed tube, and the movable tube can slide left and right. Multiple second suction heads are arranged radially along the movable tube, and each second suction head can reciprocate radially along the movable tube when the movable tube slides left and right; A detection column is installed outside the exhaust pipe. An air inlet and an air outlet are arranged at intervals on the side wall of the detection column. The air inlet is connected to the left end of the fixed pipe. The ammonia content sensor is installed inside the detection column. The first suction head is connected to the right end of the movable tube.

2. The ammonia slip control device for the polymer denitrification system according to claim 1, characterized in that, The ammonia slip detection device also includes: The fan blades are fixed to the outer wall of the movable tube. A fixed plate is fixed to the fixed tube and located on the left side of the movable tube; the right side of the fixed plate has several arc-shaped grooves, the beginning and end of the arc-shaped grooves are not connected, and the bottom of the arc-shaped grooves has a predetermined slope. A movable disc is connected to the left end of the movable tube. A transmission block is provided on the left side of the movable disc. The left end of the transmission block can slide in contact with the right side of the fixed disc or slide in contact with the bottom of the arc-shaped groove.

3. The ammonia slip control device for the polymer denitrification system according to claim 1, characterized in that, The ammonia escape detection mechanism further includes a first branch pipe and a second branch pipe; the first branch pipe is connected to the first suction head, and the second branch pipe is connected to the second suction head; the first branch pipe is connected to the right side wall of the movable pipe; the first branch pipe and the second branch pipe are inserted into each other, and any two adjacent second branch pipes are inserted into each other.

4. The ammonia slip control device for the polymer denitrification system according to claim 3, characterized in that, The ammonia escape detection mechanism also includes a connecting rod, one end of which is hinged to the movable tube and the other end of which is hinged to the second branch tube.

5. The ammonia slip control device for the polymer denitrification system according to claim 4, characterized in that, The ammonia slip detection device also includes: The movable plug slides longitudinally within the detection column; The transmission rod has one end connected to the movable plug and the other end sliding through the detection column and then making sliding contact with the outer wall of the movable tube; several convex rings are distributed along the axial direction on the outer wall of the movable tube; A rotating ring is provided, with an annular groove on the inner wall of the detection column, and the rotating ring is rotatably connected in the annular groove; the rotating ring has an air inlet and an air outlet, when the air inlet is aligned and connected with the air inlet hole, the air outlet is misaligned with the air outlet hole; when the air inlet is misaligned with the air inlet hole, the air outlet is aligned and connected with the air outlet hole.

6. The ammonia slip control device for the polymer denitrification system according to claim 5, characterized in that, The ammonia slip detection device also includes: A wedge-shaped block is located inside the detection column and connected to the transmission rod; A guide plate is disposed on the inner wall of the detection column; The push rod has its middle part slidably connected to the guide plate; the left end of the push rod can slide in contact with the wedge block, and the right end can slide in contact with the bottom of the guide groove. A guide groove is located inside the rotating ring; the bottom of the guide groove has a predetermined slope. A spring is used to reset the rotating ring after rotation.

7. A method for controlling ammonia slip in a polymer denitrification system, comprising using the ammonia slip control device for a polymer denitrification system as described in any one of claims 1 to 6, characterized in that, include: Adjust the positions of the first and second suction heads to draw in smoke from multiple locations within the exhaust pipe; The collected flue gas is mixed and guided into the detection column to contact the ammonia content sensor for detection; the detected flue gas is then promptly discharged from the detection column. The control mechanism adjusts the flow rate in the infusion pipeline based on the detection results of the ammonia content sensor.

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