Device for regulating the amount of flue gases for an SCR system

Abstract

The utility model relates to industrial denitration technical field, concretely relates to be used for SCR system flue gas quantity adjusting device, include: air inlet pipe and set up preheater under air inlet pipe, still include: the adjusting mechanism sets up in the air outlet department of air inlet pipe, including a plurality of synchronous turnover's fan blade, the fan blade passes through fixed ring and pivot one installation on fixed column, the servo motor is connected with the adjusting mechanism through connecting shaft, is used for driving the turnover of fan blade to adjust flue gas flow, is connected with the preheater through pipeline, is used for carrying out denitration treatment to the flue gas after adjusting. The utility model discloses set up adjusting mechanism before air inlet pipe and preheater, drive pivot rotation through servo motor work, and further drive fan blade turnover, simultaneously drive the synchronous rotation of long board outside fixed ring through the linkage department outside fixed ring, and further drive fan blade synchronous turnover, thereby reach the effect of adjusting flue gas intake capacity.

Description

Technical Field

[0001] This utility model relates to the field of industrial denitrification technology, and in particular to a flue gas volume regulation device for SCR systems. Background Technology

[0002] SCR (Sequencing Catalytic Reduction) systems are one of the mainstream technologies for industrial flue gas denitrification. Their core principle is to inject a reducing agent (such as ammonia) into the flue gas, which, under the action of a catalyst, reduces nitrogen oxides into nitrogen and water. Stable regulation of the flue gas volume is crucial to the denitrification efficiency, reducing agent consumption, and operational safety of the SCR system. Flue gas volume regulation devices are designed to address fluctuations in flue gas volume caused by factors such as load fluctuations and fuel changes, ensuring the efficient and stable operation of the SCR system.

[0003] However, in most existing SCR denitrification devices, the amount of flue gas entering the system cannot be controlled, resulting in excessive flue gas in the preheater and insufficient preheating of the flue gas, thus reducing the quality of denitrification. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a flue gas volume adjustment device for SCR systems to solve the problem of not being able to adjust the intake volume of the required denitrification flue gas.

[0005] To achieve the above objectives, this utility model provides a flue gas volume regulating device for an SCR system, comprising:

[0006] The intake pipe and the preheater installed below the intake pipe also include:

[0007] An adjustment mechanism is provided at the air outlet of the air inlet pipe, and includes multiple fan blades that can be rotated synchronously. The fan blades are mounted on a fixed column by a fixing ring and a rotating shaft.

[0008] A servo motor, which is connected to the adjustment mechanism via a connecting shaft, is used to drive the fan blades to rotate in order to adjust the flue gas flow rate;

[0009] The denitrification tower, connected to the preheater via a pipeline, is used to denitrify the conditioned flue gas;

[0010] The discharge section is located at the outlet end of the denitrification tower and is used to discharge the treated flue gas.

[0011] Furthermore, the adjustment mechanism also includes a fixing ring, the upper and lower ends of which are fixedly connected to the outer walls of the air intake pipe and the preheater, respectively. A protective shell is provided on the outer periphery of the adjustment mechanism, and the protective shell is fixedly connected to the air intake pipe and the preheater, respectively. The servo motor is fixedly connected to the inner wall of the protective shell.

[0012] Furthermore, the outer circumference of the fixing ring is provided with multiple fixing blocks, which are fixedly connected to the connecting shaft. The fixing blocks are connected to adjacent fan blades through connecting rod one and connecting rod two, so as to realize the synchronous rotation of multiple sets of fan blades.

[0013] Furthermore, a long plate is fixedly connected to the lower end of the fixed block, and two rotating shafts are axially arranged on the long plate. Each pair of long plates is hinged to connecting rod one and connecting rod two through the rotating shaft two to form a linkage transmission structure.

[0014] Furthermore, the lower end of the fixed column is provided with a support frame in a cross shape, and there is a gap between the support frame and the fan blade.

[0015] Furthermore, a fixing groove is provided in the middle of the tail of the connecting shaft, and the height of the fixing groove is equal to the thickness of the fan blade.

[0016] The beneficial effects of this utility model are as follows: As can be seen from the above description, the flue gas volume adjustment device for SCR system provided by this utility model, by setting an adjustment mechanism before the air inlet pipe and the preheater, drives the rotating shaft to rotate through the operation of the servo motor, thereby driving the fan blades to rotate. At the same time, through the linkage part set outside the fixed ring, the long plate on the outer periphery of the fixed ring rotates synchronously, thereby driving the fan blades to rotate synchronously, thereby achieving the effect of adjusting the flue gas intake volume. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional representation of an embodiment of the present utility model;

[0019] Figure 2 This is a front view of an embodiment of the present utility model;

[0020] Figure 3 This is a cross-sectional view of the fixing ring according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the adjustment mechanism according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the adjustment mechanism flipping in an embodiment of the present invention.

[0023] The diagram is marked as follows:

[0024] 1. Inlet pipe; 2. Protective shell; 3. Preheater; 4. Adjustment mechanism; 411. Fixing ring; 412. Fan blade; 413. Rotating shaft one; 414. Fixing column; 415. Support frame; 42. Servo motor; 43. Connecting shaft; 431. Fixing block; 432. Long plate; 433. Rotating shaft two; 434. Connecting rod one; 435. Connecting rod two; 5. Pipeline; 6. Denitrification tower; 7. Discharge section. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the flue gas volume regulating device for an SCR system includes: an inlet pipe 1 and a preheater 3 installed below the inlet pipe 1, a denitrification tower 6 for denitrifying the flue gas, and an outlet 7, and further includes:

[0028] Adjustment mechanism 4 is located at the air outlet of air inlet pipe 1 and includes multiple fan blades 412 that can rotate synchronously. The fan blades 412 are mounted on fixed column 414 through fixed ring 411 and rotating shaft 413.

[0029] Servo motor 42, connected to adjustment mechanism 4 via connecting shaft 43, is used to drive the fan blades 412 to rotate and adjust the flue gas flow.

[0030] Specifically, when using the SCR system for denitrification, the flue gas requiring denitrification enters the preheater 3 through the inlet pipe 1. After being heated, it enters the denitrification tower 6 through the pipe 5 for denitrification treatment and is then discharged through the outlet 7. When the flue gas enters the preheater 3, the servo motor 42 is started. When the servo motor 42 is working, it can drive the connecting shaft 43 connected to it to rotate. Then, through the connecting rod 434 or connecting rod 435 between the two long plates 432, it drives the adjacent long plates 432 to rotate, which in turn drives the remaining fan blades 412 to rotate synchronously. The degree of rotation can be adjusted according to the situation, thereby controlling the amount of flue gas entering. Subsequently, the flue gas enters the preheater 3 for heating and then enters the denitrification tower 6 through the pipe 5 for denitrification. The denitrified gas is then discharged through the outlet 7.

[0031] It should be further explained that the denitrification process of the flue gas, namely the process of the flue gas entering the denitrification tower 6 through pipeline 5 for denitrification, is an existing technology in the existing SCR denitrification process, so it will not be described in detail here.

[0032] Preferably, the adjustment mechanism 4 further includes a fixing ring 411, the upper and lower ends of which are fixedly connected to the outer walls of the air intake pipe 1 and the preheater 3, respectively. A protective shell 2 is provided on the outer periphery of the adjustment mechanism 4, and the protective shell 2 is fixedly connected to the air intake pipe 1 and the preheater 3, respectively. The servo motor 42 is fixedly connected to the inner wall of the protective shell 2.

[0033] Specifically, the upper and lower ends of the fixing ring 411 are connected to the air outlet of the air inlet pipe 1 and the air inlet of the preheater 3, respectively, so that the amount of flue gas entering the preheater 3 can be adjusted. The inner diameter of the protective shell 2 matches the outer diameter of the air inlet pipe 1 and the preheater 3. The protective shell 2 can cover the adjustment mechanism 4 inside the protective shell 2, which not only protects the adjustment mechanism 4, but also looks more beautiful.

[0034] It should be further explained that the servo motor 42 is a self-locking motor, which can keep the connecting shaft 43 from rotating after rotation adjustment. Its control signal is linked with the denitrification efficiency parameter of the SCR system and is dynamically adjusted according to the denitrification situation.

[0035] Preferably, the fixing block 431 is fixedly connected to the connecting shaft 43, and the fixing block 431 is connected to the adjacent fan blades 412 through the first connecting rod 434 and the second connecting rod 435 to realize the synchronous rotation of multiple sets of fan blades 412; two rotating shafts 433 are axially arranged on the long plate 432, and every two long plates 432 are hinged to the first connecting rod 434 and the second connecting rod 435 through the rotating shaft 433 to form a linkage transmission structure.

[0036] Specifically, when the servo motor 42 drives a connecting shaft 43 to rotate, the long plate 432 fixed to the connecting shaft 43 also rotates. When the long plate 432 rotates, it can drive the adjacent long plate 432 to rotate through the connecting rod 434 or connecting rod 435 between the two long plates 432. Each pair of long plates 432 is provided with a connecting rod 434 or connecting rod 435. When the long plate 432 connected to the servo motor 42 is driven to rotate, the connecting rod 434 and connecting rod 435 can drive the other fixed blocks 431 on the outer periphery of the fixed ring 411 to rotate synchronously, thereby driving the other fan blades 412 to rotate synchronously.

[0037] Preferably, the lower end of the fixed column 414 is provided with a support frame 415 in a cross shape, and there is a gap between the support frame 415 and the fan blade 412.

[0038] Specifically, the gap between the support frame 415 and the fan blade 412 is greater than half the width of the fan blade 412, so that the fan blade 412 can rotate without restriction.

[0039] Preferably, a fixing groove is provided in the middle of the tail of the connecting shaft 43, and the height of the fixing groove is equal to the thickness of the fan blade 412.

[0040] Specifically, the tail of the connecting shaft 43 holds the fan blade 412 in the middle of the rotating shaft, locking it in the middle from both the top and bottom surfaces of the fan blade 412, making the fan blade 412 more stable when it rotates.

[0041] The flue gas volume adjustment device for SCR systems provided by this utility model, when used in an SCR system for denitrification, the flue gas requiring denitrification enters the preheater 3 through the inlet pipe 1, and after being heated, enters the denitrification tower 6 through the pipe 5 for denitrification treatment, and then is discharged through the outlet 7. When the flue gas enters the preheater 3, the servo motor 42 is started. When the servo motor 42 is working, it can drive the connecting shaft 43 connected to it to rotate. When the connecting shaft 43 rotates, it can drive the fan blades 412 to rotate. At the same time, the fan blades 412 also rotate on the inner wall of the fixed column 414. Each fixed ring 411 has a connecting shaft 43 and a rotating shaft 413 at both ends. When the servo motor 42 drives the fan blades 412 to rotate, the fan blades 412 ... When one of the connecting shafts 43 rotates, the long plate 432 fixed to the connecting shaft 43 also rotates. When the long plate 432 rotates, it can drive the adjacent long plate 432 to rotate through the connecting rod 434 or connecting rod 435 between the two long plates 432. Each pair of long plates 432 is provided with a connecting rod 434 or connecting rod 435. When the long plate 432 connected to the servo motor 42 is driven to rotate, the other fixed blocks 431 on the outer periphery of the fixed ring 411 can be driven to rotate synchronously through the connecting rod 434 and connecting rod 435, which can then drive the other fan blades 412 to rotate synchronously. The degree of rotation can be adjusted according to the situation, thereby achieving the effect of controlling the amount of flue gas entering.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0043] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flue gas volume regulating device for an SCR system, comprising an inlet pipe (1) and a preheater (3) disposed below the inlet pipe (1), characterized in that, Also includes: Adjustment mechanism (4), the adjustment mechanism (4) is set at the air outlet of the air inlet pipe (1), including multiple fan blades (412) that can be rotated synchronously, the fan blades (412) are installed on the fixed column (414) through the fixing ring (411) and the rotating shaft (413); Servo motor (42), which is connected to the adjustment mechanism (4) via a connecting shaft (43), is used to drive the fan blades (412) to rotate to adjust the flue gas flow rate; The denitrification tower (6) is connected to the preheater (3) via a pipe (5) and is used to denitrify the regulated flue gas; The discharge section (7) is located at the outlet end of the denitrification tower (6) and is used to discharge the treated flue gas.

2. The flue gas volume regulating device for an SCR system according to claim 1, characterized in that, The adjustment mechanism (4) also includes a fixing ring (411), the upper and lower ends of which are fixedly connected to the outer walls of the air inlet pipe (1) and the preheater (3), respectively. A protective shell (2) is provided on the outer periphery of the adjustment mechanism (4), and the protective shell (2) is fixedly connected to the air inlet pipe (1) and the preheater (3), respectively. The servo motor (42) is fixedly connected to the inner wall of the protective shell (2).

3. The flue gas volume regulating device for an SCR system according to claim 1, characterized in that, The outer circumference of the fixing ring (411) is provided with multiple fixing blocks (431). The fixing blocks (431) are fixedly connected to the connecting shaft (43). The fixing blocks (431) are connected to the adjacent fan blades (412) through connecting rod one (434) and connecting rod two (435) to realize the synchronous rotation of multiple sets of fan blades (412).

4. The flue gas volume regulating device for an SCR system according to claim 3, characterized in that, The lower end of the fixed block (431) is fixedly connected to a long plate (432). Two rotating shafts (433) are axially arranged on the long plate (432). Each pair of long plates (432) are hinged to connecting rod one (434) and connecting rod two (435) through the rotating shaft two (433) to form a linkage transmission structure.

5. The flue gas volume regulating device for an SCR system according to claim 1, characterized in that, The lower end of the fixed column (414) is provided with a support frame (415) in a cross shape, and there is a gap between the support frame (415) and the fan blade (412).

6. The flue gas volume regulating device for an SCR system according to claim 1, characterized in that, A fixing groove is provided in the middle of the tail of the connecting shaft (43), and the height of the fixing groove is equal to the thickness of the fan blade (412).

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