Fan energy-saving adjusting device of power plant air and smoke system

Abstract

The utility model discloses a fan energy-saving adjusting device of a power plant air and smoke system, which belongs to the technical field of power plant air and smoke systems and comprises an air feeder and an air inlet duct mounted at the air inlet end of the air feeder, a mounting frame is vertically and slidably arranged between the upper end and the lower end of the air inlet duct, and filter screens are mounted at the top and the bottom of the mounting frame. The filter screen is as high as the interior of the air inlet duct, and partition plates are symmetrically arranged on the two sides of the interior of the air inlet duct. The installation frame is vertically arranged in the air inlet duct in a sliding mode, the filter screens are arranged at the upper end and the lower end of the installation frame, and the air inlet duct is used in cooperation with a lifting mechanism composed of the partition plate, the air inlet duct side edge blocking plate, the horizontal rack, the gear, the vertical rack, the installation groove, the conical insertion block, the insertion groove and the spring. And after the filter screen at the bottom of the mounting frame is blocked, the lifting mechanism is automatically triggered through air pressure, the mounting frame is controlled to move downwards, the position of the filter screen is replaced, the air inlet effect in the using process is ensured, and practicability is higher.

Description

Technical Field

[0001] This utility model relates to an energy-saving regulating device, and in particular to an energy-saving regulating device for a fan in a power plant flue gas system, belonging to the technical field of power plant flue gas systems. Background Technology

[0002] In the prior art, such as the invention with application number 202110362564.X, an energy-saving utilization device for the flue gas system of a thermal power plant is disclosed. This device addresses the problem that during boiler operation, variations in ambient temperature and air density lead to significant differences in the operating conditions of the boiler flue gas system. In summer, the increased output of the flue gas system can easily cause a decrease in the stability of the fans, particularly the induced draft fan, which is prone to stalling and other unsafe events, resulting in a deterioration in the safe and stable operation of the unit. The device addresses this by installing two filters in the inlet ducts of the forced draft fan and primary air fan. These filters can be used alternately, facilitating cleaning without affecting air filtration, reducing obstruction, improving filtration efficiency, and preventing poor air intake. The incoming air is cooled by a heat exchange device within the duct, reducing the air temperature in the inlet area of ​​the forced draft fan and primary air fan and increasing the air density. Finally, a heating device within the outlet ducts of the forced draft fan and primary air fan increases the air temperature in the outlet ducts, thereby improving the boiler's combustion rate.

[0003] The above-mentioned applications still have shortcomings:

[0004] Although two sets of filters are staggered during the air filtration process and can be replaced when cleaning the filters, they cannot be automatically replaced according to the degree of clogging. This makes it impossible to ensure a stable air intake for the flue gas system during use, affecting the normal operation of the boiler.

[0005] To address this issue, an energy-saving regulating device for the fan in a power plant flue gas system was designed. Utility Model Content

[0006] The main purpose of this utility model is to provide an energy-saving regulating device for the fan of a power plant flue gas system, so as to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] An energy-saving regulating device for a power plant flue gas system includes a blower and an air inlet duct installed at the air inlet end of the blower. A mounting frame is vertically slidably arranged between the upper and lower ends of the air inlet duct. Filter screens are installed at the top and bottom of the mounting frame. The height of the filter screens is the same as the internal height of the air inlet duct. Baffles are symmetrically arranged on both sides inside the air inlet duct. The side of the mounting frame fits against the inner side of the baffle. A lifting mechanism for controlling the vertical sliding of the mounting frame is provided between the inner wall of the air inlet duct and the baffle.

[0009] Preferably, a protective cover is fixed to the top of the air inlet duct, the top of the mounting frame is located inside the protective cover, and a support rod is fixed between the side of the protective cover and the top of the air inlet duct.

[0010] Preferably, the filter screen is installed inside the mounting frame, and a handle is fixed at the middle position of the bottom of the mounting frame.

[0011] Preferably, the lifting mechanism includes a blocking plate, a horizontal rack, a gear, a vertical rack, and a positioning component. The blocking plate is slidably disposed between the partition and the air inlet duct, and the side of the blocking plate is in contact with the inner wall of the air inlet duct and the side of the partition. A horizontal rack is vertically fixed to the side of the blocking plate. A gear that meshes with the horizontal rack is rotatably mounted on the top of the side of the partition. A vertical rack is vertically disposed on the side of the mounting frame, and the vertical rack meshes with the gear. A positioning component for fixing and releasing the blocking plate is provided on the side of the air inlet duct.

[0012] Preferably, the side of the blocking plate is provided with a rubber sealing ring, and the rubber sealing ring is in contact with the inner wall of the air inlet duct and the outer side of the partition.

[0013] Preferably, the positioning component includes a mounting groove, a tapered insert, a slot, and a spring. The mounting groove is located on both sides of the air inlet duct. A tapered insert is slidably disposed inside the mounting groove. A spring is provided between the tapered insert and the inner end of the mounting groove. A slot that mates with the tapered insert is provided on the side of the blocking plate.

[0014] Preferably, a contact switch is installed on the outer side of the partition below the lifting mechanism, and a buzzer is installed on the outer side of the air inlet duct. The contact switch is electrically connected to the buzzer via a wire.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model features a vertically sliding mounting frame inside the air inlet duct, with filters installed at both the top and bottom. Combined with a lifting mechanism consisting of a partition, side blocking plate of the air inlet duct, horizontal rack, gear, vertical rack, mounting groove, conical insert, slot, and spring, the mechanism automatically triggers the lifting mechanism when the filter at the bottom of the mounting frame becomes clogged. This causes the mounting frame to move downwards, replacing the filter and ensuring effective air intake during use, thus enhancing its practicality.

[0017] 2. This utility model has a buzzer installed on the side of the air inlet duct, which works in conjunction with a contact switch located below the gear on the side of the blocking plate. After the filter screen on the mounting frame is adjusted downwards, the blocking plate can be used to squeeze the contact switch to control the buzzer to turn on and provide a replacement reminder, making it more practical. Attached Figure Description

[0018] Figure 1This is the front view of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 This is a top sectional view of the air inlet duct of this utility model;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle.

[0022] In the diagram: 1. Blower; 2. Air inlet duct; 3. Mounting frame; 4. Filter screen; 5. Protective cover; 6. Partition plate;

[0023] 7. Lifting mechanism; 701. Blocking plate; 702. Horizontal rack; 703. Gear; 704. Vertical rack; 705. Mounting groove; 706. Conical insert; 707. Slot; 708. Spring; 8. Buzzer; 9. Contact switch. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes an energy-saving regulating device for a power plant flue gas system fan, including a blower 1 and an air inlet duct 2 installed at the air inlet end of the blower 1. A mounting frame 3 is vertically slidably arranged between the upper and lower ends of the air inlet duct 2. Filter screens 4 are installed at the top and bottom of the mounting frame 3. The height of the filter screens 4 is the same as the internal height of the air inlet duct 2. Partitions 6 are symmetrically arranged on both sides inside the air inlet duct 2. The side of the mounting frame 3 is attached to the inner side of the partition 6. A lifting mechanism 7 for controlling the vertical sliding of the mounting frame 3 is provided between the inner wall of the air inlet duct 2 and the partition 6.

[0031] During the operation of the flue gas system, the blower 1 starts to draw air from the inside of the air inlet duct 2. In the initial state, the filter 4 at the bottom of the mounting frame 3 is located inside the air inlet duct 2, and the filter 4 at the top is located at the top of the air inlet duct 2. After the outside air enters the air inlet duct 2, it is filtered by the filter 4 at the bottom of the mounting frame 3. After the filter 4 at the bottom of the mounting frame 3 has been used for a long time, it will become clogged. At this time, there is a large pressure difference between the two sides of the filter 4 at the bottom of the mounting frame 3, which will trigger the lifting mechanism 7 to release the positioning of the mounting frame 3 and control the downward movement of the mounting frame 3. The filter 4 at the top of the mounting frame 3 is moved down into the air inlet duct 2, while the filter 4 at the bottom is moved out of the air inlet duct 2 for cleaning and replacement. After the filter 4 at the bottom of the mounting frame 3 is replaced or cleaned, the mounting frame 3 is controlled to move upward, and the air is filtered again by the filter 4 at the bottom of the mounting frame 3. The filter 4 at the top is used for emergency purposes.

[0032] Example 2

[0033] The solution in Example 1 will be further described below with reference to its specific working method.

[0034] like Figure 1As shown, in a preferred embodiment, based on the above method, a protective cover 5 is fixed to the top of the air inlet duct 2, the top of the mounting frame 3 is located inside the protective cover 5, and a support rod is fixed between the side of the protective cover 5 and the top of the air inlet duct 2. The use of the protective cover 5 can protect the filter screen 4 on the top of the mounting frame 3 during use.

[0035] like Figure 2 As shown, in a preferred embodiment, based on the above method, the filter screen 4 is further installed inside the mounting frame 3, and a handle is fixed at the middle position of the bottom end of the mounting frame 3. After the filter screen 4 is replaced, the mounting frame 3 can be pushed up and reset by holding the handle.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, the lifting mechanism 7 further includes a blocking plate 701, a horizontal rack 702, a gear 703, a vertical rack 704, and a positioning component. The blocking plate 701 is slidably disposed between the partition 6 and the air inlet 2, and the side of the blocking plate 701 is in contact with the inner wall of the air inlet 2 and the side of the partition 6. The horizontal rack 702 is vertically fixed to the side of the blocking plate 701. The gear 703, which meshes with the horizontal rack 702, is rotatably mounted on the top of the side of the partition 6. The vertical rack 704 is vertically disposed on the side of the mounting frame 3, and the vertical rack 704 meshes with the gear 703. The side of the air inlet 2 is provided with a positioning component for fixing and releasing the blocking plate 701.

[0037] After the filter 4 becomes clogged, the air pressure pushing the blockage plate 701 is greater than the resistance applied to the blockage plate 701 by the positioning component, automatically releasing the lock on the blockage plate 701. The blockage plate 701 slides horizontally between the inner wall of the air inlet duct 2 and the partition plate 6. The blockage plate 701 drives the horizontal rack 702 to move and controls the gear 703 to rotate. The rotation of the gear 703 controls the vertical rack 704 to move downward, thereby controlling the mounting frame 3 to move downward. When the filter 4 at the top of the mounting frame 3 is completely inside the air inlet duct 2, the blockage plate 701 reaches the side of the gear 703. The blockage plate 701 is blocked by the gear 703 and will not move again. At this time, the position of the mounting frame 3 is fixed.

[0038] like Figure 3 As shown, in a preferred embodiment, based on the above method, the side of the blocking plate 701 is further provided with a rubber sealing ring, and the rubber sealing ring is in contact with the inner wall of the air inlet duct 2 and the outer side of the partition plate 6. The use of the rubber sealing ring ensures the sealing effect of the side of the blocking plate 701.

[0039] like Figure 4As shown, in a preferred embodiment, based on the above method, the positioning component further includes a mounting groove 705, a conical insert 706, a slot 707, and a spring 708. The mounting groove 705 is opened on both sides of the air inlet duct 2. The conical insert 706 is slidably disposed inside the mounting groove 705. A spring 708 is provided between the conical insert 706 and the inner end of the mounting groove 705. The side of the blocking plate 701 is provided with a slot 707 that cooperates with the conical insert 706.

[0040] In the initial state, the conical insert 706 is inserted into the slot 707 under the force of the spring 708, positioning the blocking plate 701. When the air pressure pushing the blocking plate 701 is greater than the pushing force applied to the blocking plate 701 by the spring 708 through the conical insert 706, the conical insert 706 is pushed into the mounting groove 705, releasing the positioning state of the blocking plate 701. After the filter screen 4 is replaced or cleaned, the mounting frame 3 moves upward, and in conjunction with the transmission of the gear 703 and rack, controls the resetting of the blocking plate 701, returning it to the positioning state.

[0041] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, a contact switch 9 is further installed on the outer side of the partition 6 below the lifting mechanism 7, and a buzzer 8 is provided on the outer side of the air inlet duct 2. The contact switch 9 is electrically connected to the buzzer 8 through a wire. When the blockage plate 701 reaches the side of the gear 703, it will squeeze the contact switch 9, control the buzzer 8 to sound, and provide a prompt.

[0042] Example 3

[0043] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0044] During the operation of the flue gas system, the blower 1 starts to draw air from the inside of the air inlet duct 2. Initially, the filter 4 at the bottom of the mounting frame 3 is located inside the air inlet duct 2, and the filter 4 at the top is located at the top of the air inlet duct 2. After the outside air enters the air inlet duct 2, it is filtered by the filter 4 at the bottom of the mounting frame 3. After prolonged use, the filter 4 at the bottom of the mounting frame 3 will become clogged. At this time, there is a large pressure difference between the two sides of the filter 4 at the bottom of the mounting frame 3. When the air pressure pushes the blocking plate 701, it is greater than the push exerted by the spring 708 on the blocking plate 701 through the conical insert 706. This pushes the conical insert 706 into the mounting groove 705, releasing the blocking plate 701 from its positioning state. The blocking plate 701 then slides horizontally between the inner wall of the air inlet duct 2 and the partition 6. The blocking plate 701 drives the horizontal movement of the air inlet duct 2. The rack 702 moves and controls the gear 703 to rotate. The rotation of the gear 703 controls the vertical rack 704 to move downward, which in turn controls the mounting frame 3 to move downward. When the filter 4 at the top of the mounting frame 3 is completely inside the air inlet duct 2, the blocking plate 701 reaches the side of the gear 703. The blocking plate 701 is blocked by the gear 703 and will not move again. At this time, the position of the mounting frame 3 is fixed. At the same time, when the blocking plate 701 reaches the side of the gear 703, it will squeeze the contact switch 9, control the buzzer 8 to sound, and provide a cleaning reminder. After the filter 4 at the bottom of the mounting frame 3 is replaced or cleaned, the mounting frame 3 is controlled to move upward, and the filter is filtered again through the filter 4 at the bottom of the mounting frame 3. The upward movement of the mounting frame 3, in conjunction with the transmission of the gear 703 and the rack, controls the blocking plate 701 to reset and enter the positioning state again.

[0045] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. An energy-saving regulating device for a power plant flue gas system fan, comprising a blower (1) and an air inlet duct (2) installed at the air inlet end of the blower (1), characterized in that: An installation frame (3) is vertically slidably installed between the upper and lower ends of the air inlet duct (2). A filter screen (4) is installed on the top and bottom of the installation frame (3). The height of the filter screen (4) is the same as the height inside the air inlet duct (2). A partition (6) is symmetrically arranged on both sides inside the air inlet duct (2). The side of the installation frame (3) is attached to the inner side of the partition (6). A lifting mechanism (7) for controlling the vertical sliding of the installation frame (3) is provided between the inner wall of the air inlet duct (2) and the partition (6).

2. The energy-saving regulating device for a power plant flue gas system fan according to claim 1, characterized in that: A protective cover (5) is fixed to the top of the air inlet duct (2), the top of the mounting frame (3) is located inside the protective cover (5), and a support rod is fixed between the side of the protective cover (5) and the top of the air inlet duct (2).

3. The energy-saving regulating device for a power plant flue gas system fan according to claim 1, characterized in that: The filter screen (4) is snapped into the inside of the mounting frame (3), and a handle is fixed at the middle position of the bottom end of the mounting frame (3).

4. The energy-saving regulating device for a power plant flue gas system fan according to claim 1, characterized in that: The lifting mechanism (7) includes a blocking plate (701), a horizontal rack (702), a gear (703), a vertical rack (704), and a positioning component. The blocking plate (701) is slidably disposed between the partition (6) and the air inlet (2), and the side of the blocking plate (701) is in contact with the inner wall of the air inlet (2) and the side of the partition (6). The side of the blocking plate (701) is vertically fixed with a horizontal rack (702). The top of the side of the partition (6) is rotatably mounted with a gear (703) that meshes with the horizontal rack (702). The side of the mounting frame (3) is vertically provided with a vertical rack (704), and the vertical rack (704) meshes with the gear (703). The side of the air inlet (2) is provided with a positioning component for fixing and releasing the blocking plate (701).

5. The energy-saving regulating device for a power plant flue gas system fan according to claim 4, characterized in that: The side of the blocking plate (701) is provided with a rubber sealing ring, and the rubber sealing ring is in contact with the inner wall of the air inlet duct (2) and the outer side of the partition plate (6).

6. The energy-saving regulating device for a power plant flue gas system fan according to claim 5, characterized in that: The positioning components include a mounting groove (705), a tapered insert (706), a slot (707), and a spring (708). The mounting groove (705) is located on both sides of the air inlet duct (2). The tapered insert (706) is slidably disposed inside the mounting groove (705). A spring (708) is provided between the tapered insert (706) and the inner end of the mounting groove (705). The side of the blocking plate (701) is provided with a slot (707) that mates with the tapered insert (706).

7. An energy-saving regulating device for a power plant flue gas system fan according to any one of claims 4, 5, or 6, characterized in that: A contact switch (9) is installed on the outside of the partition (6) below the lifting mechanism (7), and a buzzer (8) is installed on the outside of the air inlet duct (2). The contact switch (9) is electrically connected to the buzzer (8) through a wire.

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