Ammonia escape control equipment and control method of polymer denitration system

Abstract

The invention provides ammonia escape control equipment and a control method of a polymer denitration system, and relates to the technical field of removal of nitrogen oxides in flue gas. The equipment is applied to the method and comprises a denitration reactor, the denitration reactor is provided with a smoke inlet pipe and a smoke exhaust pipe, and a spraying agent grating and a reaction area are sequentially arranged between the smoke inlet pipe and the smoke exhaust pipe; the agent conveying pipeline is connected with the agent spraying grid; an adjusting mechanism; the ammonia escape detection mechanism is used for detecting ammonia escape in the smoke exhaust pipe; and the control mechanism is used for controlling the adjusting mechanism according to a detection result of the ammonia escape detection mechanism so as to adjust the flow in the agent conveying pipeline. When the ammonia escape detection mechanism detects that the content of ammonia in the smoke exhaust pipe is higher than a preset threshold value, the control mechanism controls the adjusting mechanism to reduce the flow in the agent conveying pipeline and reduce ammonia escape, and the situation that a denitration reactor and downstream equipment are blocked and corroded due to the fact that water vapor, SO3 and ammonia in smoke escape to generate ammonium bisulfate is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of removing nitrogen oxides in flue gas, and in particular to an ammonia escape control device and a control method for a polymer denitration system. Background Art

[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 the amino groups and the polymer will break, releasing a large number of amino-containing energy groups. These amino energy groups chemically react with nitrogen oxides in the flue gas to catalytically reduce NOx to N2 and H2O, thereby achieving the purpose of denitrification.

[0003] When the content of high molecular denitrifier sprayed into the denitrification reactor is too much, the ammonia generated by the high molecular denitrifier cannot be evenly mixed with the flue gas, and the ammonia is relatively excessive, thus forming ammonia escape. The ammonia escape phenomenon will affect the safe and stable operation of the unit. The main reason is that water vapor, SO3 and ammonia in the flue gas escape, and under certain conditions, ammonium bisulfate will be generated. Ammonium bisulfate is a very sticky and corrosive substance in liquid state, which will cause 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 escape control device and control method for a polymer denitrification system, aiming to reduce ammonia escape and avoid blockage and corrosion of the denitrification reactor and downstream equipment caused by the formation of ammonium bisulfate due to the escape of water vapor, SO3 and ammonia in the flue gas.

[0006] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides an ammonia escape control device for a polymer denitration system, comprising: A denitration reactor is provided with a smoke inlet pipe and a smoke exhaust pipe, wherein a spray grid and a reaction zone are sequentially arranged between the smoke inlet pipe and the smoke exhaust pipe, and the spray grid is used to uniformly spray a polymer denitration agent to the reaction zone; A liquid delivery pipeline connected to the liquid spray grid; regulating agency; an ammonia escape detection mechanism, used to detect ammonia escape in the exhaust pipe; The control mechanism is used to control the regulating mechanism according to the detection result of the ammonia escape detection mechanism, so as to adjust the flow rate in the agent delivery pipeline.

[0007] In some embodiments of the present invention, the ammonia slip detection mechanism includes an ammonia content sensor.

[0008] In some embodiments of the present invention, the ammonia escape detection mechanism further comprises: A fixed pipe, arranged in the smoke exhaust pipe; A movable tube is rotatably sleeved on the right end of the fixed tube, and the movable tube can slide left and right; A plurality of second air suction heads are arranged along the radial direction of the movable tube, and when the movable tube slides left and right, each of the second air suction heads can reciprocate along the radial direction of the movable tube; The detection column is arranged outside the smoke exhaust pipe, and air inlet holes and air outlet holes are arranged at intervals on the side wall of the detection column, and the air inlet hole is connected to the left end of the fixed pipe; the ammonia content sensor is arranged in the detection column.

[0009] In some embodiments of the present invention, the ammonia escape detection mechanism further comprises: The fan blades are fixed on the outer wall of the movable tube; A fixed plate is fixed on the fixed tube and is located on the left side of the movable tube; a plurality of arc-shaped grooves are provided on the right side of the fixed plate, the ends of the arc-shaped grooves are not connected, and the bottom of the arc-shaped grooves has a predetermined slope; The movable plate is connected to the left end of the movable tube. A transmission block is arranged on the left side of the movable plate. The left end of the transmission block can slide in contact with the right side of the fixed plate or the bottom of the arc groove.

[0010] In some embodiments of the present invention, the ammonia escape detection mechanism further includes a first air suction head connected to the right end of the movable tube.

[0011] In some embodiments of the present invention, the ammonia escape detection mechanism also includes a first branch pipe and a second branch pipe; the first branch pipe is connected to the first air suction head, and the second branch pipe is connected to the second air suction head; the first branch pipe is connected to the right end side wall of the movable tube; the first branch pipe is plugged into the second branch pipe, and any two adjacent second branches are plugged into each other.

[0012] 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.

[0013] In some embodiments of the present invention, the ammonia escape detection mechanism further comprises: A movable plug is longitudinally slidably fitted in the detection column; A transmission rod, one end of which is connected to the movable plug, and the other end of which slides through the detection column and then contacts the outer wall of the movable tube in a sliding manner; a plurality of convex rings are distributed on the outer wall of the movable tube along its axial direction; A rotating ring, an annular groove is provided on the inner wall of the detection column, and the rotating ring is rotatably connected in the annular groove; the rotating ring is provided with an air inlet connecting port and an exhaust connecting port, when the air inlet connecting port is aligned and connected with the air inlet hole, the exhaust connecting port is misaligned with the air outlet hole; when the air inlet connecting port is misaligned with the air inlet hole, the exhaust connecting port is aligned and connected with the air outlet hole.

[0014] In some embodiments of the present invention, the ammonia escape detection mechanism further comprises: A wedge-shaped block, located in the detection column and connected to the transmission rod; A guide plate, arranged on the inner wall of the detection column; A push rod, the middle part of which is laterally slidably connected to the guide plate; the left end of the push rod can be in sliding contact with the wedge block, and the right end of the push rod can be in sliding 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.

[0015] In a second aspect, the present invention provides a method for controlling ammonia escape in a polymer denitration system, comprising: Adjusting the positions of the first suction head and the second suction head to absorb smoke from multiple positions in the smoke exhaust pipe; The smoke is mixed and then guided into the detection column to contact with the ammonia content sensor for detection; the detected smoke is discharged from the detection column in a timely manner; The control mechanism enables the regulating mechanism to adjust the flow rate in the agent delivery pipeline according to the detection result of the ammonia content sensor.

[0016] The embodiments of the present invention have at least the following advantages or beneficial effects: When the ammonia escape detection mechanism detects that the ammonia content in the exhaust pipe is higher than the preset threshold, it means that there is a relative excess of ammonia in the denitrification reactor and the ammonia escape is serious. The control mechanism controls the regulating mechanism to reduce the flow in the agent pipeline and reduce the amount of ammonia in the denitrification reactor, thereby alleviating the relative excess of ammonia and reducing ammonia escape. This avoids the formation of ammonium bisulfate due to the escape of water vapor, SO3 and ammonia in the flue gas, which may cause blockage and corrosion to the denitrification reactor and downstream equipment.

[0017] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the ammonia escape control device of the polymer denitrification system; Figure 2 It is a structural schematic diagram of an ammonia escape detection mechanism; Figure 3 It is a structural schematic diagram of an arc-shaped slot that is not connected at the head and tail; Figure 4 It is a schematic diagram of the structure of the movable plug, the transmission rod and the rotating ring; Figure 5 for Figure 4 Section view along AA.

[0020] icon: 1- denitrification reactor, 11- smoke inlet pipe, 12- smoke exhaust pipe, 13- spray grid, 14- reaction zone 2- Drug delivery pipeline, 31-Flow regulating valve, 4- ammonia escape detection mechanism, 41- ammonia content sensor, 42- fixed tube, 43- movable tube, 44- first air suction head, 45- second air suction head, 46- detection column, 461- air inlet, 462- air outlet, 463- catheter, 47-fan blade, 48-fixed plate, 481-arc groove, 49-movable plate, 491-transmission block, 51-first branch pipe, 52-second branch pipe, 53-connecting rod, 54-movable plug, 55-transmission rod, 56-rotating ring, 561-intake connecting port, 562-exhaust connecting port, 57-convex ring, 58-annular groove, 59-wedge block, 61-guide plate, 62-push rod, 63-guide groove, 64-spring. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can realize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0022] In the description of the embodiments of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "up", "down", "left", "right", "bottom", "inside", "outside", "counterclockwise", "axial", "radial", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] “Several” means one or more than one, unless otherwise clearly and specifically defined.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] The embodiments of the present invention are described in detail below.

[0027] Example

[0028] First, see Figure 1~Figure 5 This embodiment provides an ammonia escape control device for a polymer denitration system, including a denitration reactor 1, a transport agent pipeline 2, a regulating mechanism, an ammonia escape detection mechanism 4 and a control mechanism (not shown in the figure).

[0029] The denitration reactor 1 comprises a smoke inlet pipe 11 and a smoke exhaust pipe 12, between which a spray grid 13 and a reaction zone 14 are arranged in sequence, and the spray grid 13 is used to uniformly spray the polymer denitration agent to the reaction zone 14 so that the polymer denitration agent is uniformly mixed with the flue gas.

[0030] The agent delivery pipeline 2 is connected to the spray grid 13 .

[0031] The regulating mechanism is used to adjust the flow rate in the drug delivery pipeline 2.

[0032] The ammonia escape detection mechanism 4 is used to detect ammonia escape in the smoke exhaust pipe 12 , that is, to detect the ammonia content in the smoke exhaust pipe 12 .

[0033] The control mechanism is used to control the regulating mechanism according to the detection result of the ammonia escape detection mechanism 4 so as to adjust the flow rate in the agent delivery pipeline 2 .

[0034] When the ammonia escape detection mechanism 4 detects that the ammonia content in the smoke exhaust pipe 12 is higher than the preset threshold value, it means that there is a relative excess of ammonia in the denitrification reactor 1 and the ammonia escape situation is serious. The control mechanism controls the regulating mechanism to reduce the flow in the agent delivery pipeline 2, thereby reducing the amount of ammonia in the denitrification reactor 1, thereby alleviating the relative excess of ammonia, reducing ammonia escape, and avoiding the formation of ammonium bisulfate due to the escape of water vapor, SO3 and ammonia in the flue gas, which may cause blockage and corrosion to the denitrification reactor 1 and downstream equipment.

[0035] 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 end of the ammonia content sensor 41 is electrically connected to the input end of the controller, and the input and output ends of the controller are electrically connected to the control end of the flow regulating valve 31. When the ammonia content sensor 41 detects that the ammonia content in the smoke exhaust pipe 12 is higher than a preset threshold, the opening of the flow regulating valve 31 is reduced to reduce the flow in the agent delivery pipeline 2.

[0036] In this embodiment, the ammonia escape detection mechanism 4 further includes a fixed tube 42 , a movable tube 43 , a first air suction head 44 , a second air suction head 45 and a detection column 46 .

[0037] The fixed pipe 42 is arranged at a fixed position in the smoke exhaust pipe 12 through a support plate. Preferably, the fixed pipe 42 and the smoke exhaust pipe 12 are arranged coaxially.

[0038] The movable tube 43 is rotatably sleeved on the right end of the fixed tube 42 and can slide left and right. The movable tube 43 is connected to the fixed tube 42.

[0039] The first suction head 44 is connected to the right end of the movable pipe 43 .

[0040] The plurality of second air suction heads 45 are arranged along the radial direction of the movable tube 43 , and when the movable tube 43 slides left and right, each second air suction head 45 can reciprocate along the radial direction of the movable tube 43 .

[0041] The detection column 46 is arranged outside the smoke exhaust pipe 12 , and an air inlet 461 and an air outlet 462 are arranged at intervals on the side wall of the detection column 46 . 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 arranged inside the detection column 46 .

[0042] The working principle of the above-mentioned ammonia escape detection mechanism 4 is: by rotating the movable tube 43, the second suction head 45 can be moved along a circular trajectory; by sliding the movable tube 43 left and right, the second suction head 45 can be reciprocated 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 absorb smoke from multiple positions in the smoke exhaust pipe 12, and under the action of the rotation of the movable tube 43, the smoke absorbed from various positions 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 range. On the premise of meeting the demand for detecting ammonia escape, it is possible to overcome the problem of uneven distribution of ammonia in the smoke exhaust pipe 12 (the ammonia in the smoke exhaust pipe 12 is generally unevenly distributed), thereby improving the detection accuracy.

[0043] The ammonia escape detection mechanism 4 further includes a fan blade 47 , a fixed disk 48 and a movable disk 49 .

[0044] The fan blades 47 are fixed on the outer wall of the movable tube 43 .

[0045] The fixed plate 48 is fixed on the fixed tube 42 and is located on the left side of the movable tube 43; the right side of the fixed plate 48 has a plurality of arc grooves 481, and the ends of the arc grooves 481 are not connected (such as Figure 3 As shown in FIG. 4 ), along the circumference direction of the arc-shaped groove 481, the depth of the arc-shaped groove 481 gradually decreases or increases, that is, the bottom of the arc-shaped groove 481 has a predetermined slope.

[0046] The movable disk 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 disk 49 . The left end of the transmission block 491 can slide in contact with the right side of the fixed disk 48 or the bottom of the arc groove 481 .

[0047] The fan blades 47 can drive the movable tube 43 and the movable disk 49 to rotate together under the drive of the airflow; during the rotation of the movable disk 49, the left end of the transmission block 491 can first slide in contact with the bottom of the arc groove 481 (such as Figure 2 As shown), then slide along the bottom of the arc groove 481 to the outside of the arc groove 481 and slide in contact with the right side of the fixed disk 48, and then re-enter the arc groove 481; in the above process, the bottom of the arc groove 481 with a predetermined slope cooperates with the transmission block 491, so that the transmission block 491 can move back and forth left and right, thereby driving the movable disk 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 blades 47, the fixed disk 48 and the movable disk 49, the left and right position adjustment of the first suction head 44 and the second suction head 45 is realized.

[0048] In this embodiment, the following method is adopted to realize the radial arrangement of multiple second air suction heads 45 along the movable tube 43: the ammonia escape detection mechanism 4 also includes a first branch pipe 51 and a second branch pipe 52; the first branch pipe 51 is connected to the first air suction head 44, and the second branch pipe 52 is connected to the second air suction head 45; the first branch pipe 51 is connected to the right end side wall of the movable tube 43; the first branch pipe 51 and the second branch pipe 52 are plugged in, and any two adjacent second branch pipes 52 are plugged in.

[0049] The ammonia escape detection mechanism 4 further 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 the second branch tubes 52 and the second air intake to reciprocate along the radial direction of the movable tube 43.

[0050] In order to facilitate the first suction head 44 and the second suction head 45 to absorb the smoke in the smoke exhaust pipe 12 , the ammonia escape detection mechanism 4 also includes a movable plug 54 , a transmission rod 55 and a rotating ring 56 .

[0051] The movable plug 54 is longitudinally slidably fitted in the detection column 46 .

[0052] 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; a plurality of convex rings 57 (there can be one or more convex rings 57) are distributed on the outer wall of the movable tube 43 along its axial direction, and the cross-section of the convex ring 57 is semicircular.

[0053] The rotating ring 56 is coaxially arranged with the detection column 46, and an annular groove 58 is opened on the inner wall of the detection column 46. The rotating ring 56 is rotatably connected in the annular groove 58; the rotating ring 56 is provided with an air inlet connecting port 561 and an exhaust connecting port 562. When the air inlet connecting port 561 is aligned and connected with the air inlet hole 461, the exhaust connecting port 562 is misaligned with the air outlet hole 462; when the air inlet connecting port 561 is misaligned with the air inlet hole 461, the exhaust connecting port 562 is aligned and connected with the air outlet hole 462.

[0054] During the movement of the movable tube 43 to the left, the transmission rod 55 can be lifted up by the convex ring 57 and then fall down; during the movement of the movable tube 43 to the right, the transmission rod 55 can also be lifted up by the convex ring 57 and then fall down. That is, during the movement of the movable tube 43 to the left and right, the cooperation of the transmission rod 55 and the convex ring 57 can 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 is reciprocated once, so that the first suction head 44 and the second suction head 45 can realize a suction and exhaust process, so that in the process of adjusting the positions of the first suction head 44 and the second suction head 45, the smoke suction detection column 46 at different positions can be brought into contact with the ammonia content sensor 41 for detection.

[0055] Furthermore, in order to facilitate the reciprocating rotation of the rotating ring 56 once when 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.

[0056] The wedge block 59 is located in the detection column 46 and connected to the transmission rod 55 .

[0057] The guide plate 61 is disposed on the inner wall of the detection column 46 .

[0058] The middle part of the push rod 62 is slidably connected to the guide plate 61 in a transverse direction; the left end of the push rod 62 can be in sliding contact with the wedge block 59 , and the right end can be in sliding contact with the bottom of the guide groove 63 .

[0059] The guide groove 63 is located inside the rotating ring 56 , and the depth of the guide groove 63 gradually decreases or increases along the length direction of the guide groove 63 , that is, the bottom of the guide groove 63 has a predetermined slope.

[0060] The spring 64 is used to return the rotating ring 56 to its original position after rotation.

[0061] When the transmission rod 55 moves upward, the wedge block 59 can push the push rod 62 to the right, and 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 (such as Figure 5 As shown in the figure, the rotating ring 56 is rotated counterclockwise to align and connect the air inlet connecting port 561 with the air inlet hole 461, and to misalign the exhaust connecting port 562 with the air outlet hole 462, so that the smoke can enter the detection column 46 from the air inlet connecting port 561; when the transmission rod 55 moves downward, under the action of the reset force of the spring 64, the rotating ring 56 rotates and resets in the opposite direction, so that the air inlet connecting port 561 is misaligned with the air inlet hole 461, and the exhaust connecting port 562 is aligned and connected with the air outlet hole 462, so that the smoke after detection is discharged from the exhaust connecting port 562 to the outside of the detection column 46 in a timely manner, so as to avoid the smoke after detection being retained in the detection column 46 and mixed with the smoke to be detected that enters the detection column 46 later, so as to improve the accuracy of detection.

[0062] Second, see Figure 1~Figure 5 This embodiment provides an ammonia escape control method for a polymer denitration system, which uses the ammonia escape control device for the polymer denitration system; the ammonia escape control method for the polymer denitration system comprises the following steps: Step S1, adjusting the positions of the first suction head 44 and the second suction head 45 to absorb smoke from multiple positions in the smoke exhaust pipe 12; Step S2, the smoke to be sucked is mixed and guided into the detection column 46 to contact with the ammonia content sensor 41 for detection; the detected smoke is discharged from the detection column 46 in time; Step S3: The control mechanism enables the regulating mechanism to adjust the flow rate in the agent delivery pipeline 2 according to the detection result of the ammonia content sensor 41 .

[0063] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ammonia escape control device for a polymer denitration system, characterized in that: include: A denitration reactor is provided with a smoke inlet pipe and a smoke exhaust pipe, wherein a spray grid and a reaction zone are sequentially arranged between the smoke inlet pipe and the smoke exhaust pipe, and the spray grid is used to uniformly spray a polymer denitration agent to the reaction zone; A liquid delivery pipeline connected to the liquid spray grid; regulating agency; an ammonia escape detection mechanism, used to detect ammonia escape in the exhaust pipe; The control mechanism is used to control the regulating mechanism according to the detection result of the ammonia escape detection mechanism, so as to adjust the flow rate in the agent delivery pipeline.

2. The ammonia escape control device of the polymer denitration system according to claim 1, characterized in that: The ammonia slip detection mechanism includes an ammonia content sensor.

3. The ammonia escape control device of the polymer denitration system according to claim 2, characterized in that: The ammonia escape detection mechanism also includes: A fixed pipe, arranged in the smoke exhaust pipe; A movable tube is rotatably sleeved on the right end of the fixed tube, and the movable tube can slide left and right; A plurality of second air suction heads are arranged along the radial direction of the movable tube, and when the movable tube slides left and right, each of the second air suction heads can reciprocate along the radial direction of the movable tube; The detection column is arranged outside the smoke exhaust pipe, and air inlet holes and air outlet holes are arranged at intervals on the side wall of the detection column, and the air inlet hole is connected to the left end of the fixed pipe; the ammonia content sensor is arranged in the detection column.

4. The ammonia escape control device of the polymer denitration system according to claim 3, characterized in that: The ammonia escape detection mechanism also includes: The fan blades are fixed on the outer wall of the movable tube; A fixed plate is fixed on the fixed tube and is located on the left side of the movable tube; a plurality of arc-shaped grooves are provided on the right side of the fixed plate, the ends of the arc-shaped grooves are not connected, and the bottom of the arc-shaped grooves has a predetermined slope; The movable plate is connected to the left end of the movable tube. A transmission block is arranged on the left side of the movable plate. The left end of the transmission block can slide in contact with the right side of the fixed plate or the bottom of the arc groove.

5. The ammonia escape control device of the polymer denitration system according to claim 3, characterized in that: The ammonia escape detection mechanism also includes a first air suction head, which is connected to the right end of the movable tube.

6. The ammonia escape control device of the polymer denitration system according to claim 5, characterized in that: The ammonia escape detection mechanism also includes a first branch pipe and a second branch pipe; the first branch pipe is connected to the first air suction head, and the second branch pipe is connected to the second air suction head; the first branch pipe is connected to the right end side wall of the movable pipe; the first branch pipe is plugged into the second branch pipe, and any two adjacent second branch pipes are plugged into each other.

7. The ammonia escape control device of the polymer denitration system according to claim 6, characterized in that: The ammonia escape detection mechanism also includes a connecting rod, one end of which is hinged to the movable pipe, and the other end of which is hinged to the second branch pipe.

8. The ammonia escape control device of the polymer denitration system according to claim 7, characterized in that: The ammonia escape detection mechanism also includes: A movable plug is longitudinally slidably fitted in the detection column; A transmission rod, one end of which is connected to the movable plug, and the other end of which slides through the detection column and then contacts the outer wall of the movable tube in a sliding manner; a plurality of convex rings are distributed on the outer wall of the movable tube along its axial direction; A rotating ring, an annular groove is provided on the inner wall of the detection column, and the rotating ring is rotatably connected in the annular groove; the rotating ring is provided with an air inlet connecting port and an exhaust connecting port, when the air inlet connecting port is aligned and connected with the air inlet hole, the exhaust connecting port is misaligned with the air outlet hole; when the air inlet connecting port is misaligned with the air inlet hole, the exhaust connecting port is aligned and connected with the air outlet hole.

9. The ammonia escape control device of the polymer denitration system according to claim 8, characterized in that: The ammonia escape detection mechanism also includes: A wedge-shaped block, located in the detection column and connected to the transmission rod; A guide plate, arranged on the inner wall of the detection column; A push rod, the middle part of which is laterally slidably connected to the guide plate; the left end of the push rod can be in sliding contact with the wedge block, and the right end of the push rod can be in sliding 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.

10. A method for controlling ammonia escape of a polymer denitration system, which uses the ammonia escape control device of the polymer denitration system as claimed in any one of claims 5 to 9, characterized in that: include: Adjusting the positions of the first suction head and the second suction head to absorb smoke from multiple positions in the smoke exhaust pipe; The smoke is mixed and then guided into the detection column to contact with the ammonia content sensor for detection; the detected smoke is discharged from the detection column in a timely manner; The control mechanism enables the regulating mechanism to adjust the flow rate in the agent delivery pipeline according to the detection result of the ammonia content sensor.

Images