Cyclone separator for fly ash sampling of coal-fired boiler of thermal power plant

Abstract

The invention relates to the technical field of cyclone separators, and discloses a cyclone separator for fly ash sampling of a coal-fired boiler of a thermal power plant. The rotary air inlet pipe is communicated with the side wall of the barrel; a flue gas inlet is formed in one end, far away from the barrel, of the rotary air inlet pipe; the air guide plate is movably connected into the cylinder body in the vertical direction; the extension plate and the stretching assembly are arranged close to the smoke inlet, one end of the extension plate is connected with the end, close to the smoke inlet, of the air guide plate, the middle of the extension plate abuts against the lower end of the smoke inlet, and the other end of the extension plate is connected with the stretching assembly in the direction away from the smoke inlet; the stretching assembly is used for driving the other end of the extension plate to move away from the flue gas inlet; the exhaust pipe penetrates through the top plate of the cylinder body. One end of the extension plate is connected with one end, close to the flue gas inlet, of the air guide plate, so that the extension plate can lift along with the air guide plate all the time, and the influence on the flowing speed of flue gas in the cyclone separator due to the fact that one end of the extension plate protrudes out of the air guide plate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cyclone separators, in particular to a cyclone separator used for sampling fly ash of a coal-fired boiler in a thermal power plant. Background Art

[0002] In modern thermal power plants, coal-fired boilers are the main power generation equipment. However, if the fly ash generated during the coal combustion process is not handled in time, it will not only reduce the efficiency of the boiler, but also have a serious impact on the environment. Therefore, accurate and efficient collection of fly ash samples is crucial for monitoring and optimizing the combustion process. Traditional fly ash sampling methods have many defects and cannot meet the needs of modern thermal power plants. Cyclone separators, as a new type of fly ash sampling device, have received widespread attention in recent years.

[0003] The patent with publication number CN117259039A discloses a cyclone separator for sampling fly ash from coal-fired boilers in thermal power plants. The invention can adjust the separation efficiency through the cooperation of the support rod and the guide plate, adapt to the needs under different working conditions, and ensure the representativeness of fly ash sampling. Through the cooperation of the scale rod and the paddle, the three-level adjustment of the inlet flow rate and the insertion depth of the telescopic tube can be achieved, further improving the adjustment accuracy of the separation efficiency.

[0004] However, the above-mentioned cyclone separator still has the following defects: on the one hand, during the up and down movement of the movable plate, one end of the guide plate is always placed on the movable plate, and the other end of the guide plate is rotatably connected to the smoke inlet, which requires a longer overlap length between the guide plate and the movable plate. When the movable plate rises to a small height, one end of the guide plate will be reserved above the movable plate; on the other hand, the insertion depth of the telescopic tube and the height adjustment process of the movable plate are both adjusted step by step, and the effect of continuous adjustment cannot be achieved, resulting in limited adaptability to working conditions. Summary of the invention

[0005] The present invention aims to provide a cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant, so as to overcome the above-mentioned shortcomings.

[0006] In order to achieve the above object, the technical solution of the present invention is: a cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant, comprising:

[0007] Cylinder;

[0008] A rotating air inlet pipe communicated with the side wall of the cylinder, wherein a smoke inlet is provided at one end of the rotating air inlet pipe away from the cylinder;

[0009] An air guide plate movably connected to the cylinder body along the vertical direction;

[0010] An extension plate and a stretching assembly are arranged near the smoke inlet, one end of the extension plate is connected to the end of the air guide plate near the smoke inlet, the middle of the extension plate abuts against the lower end of the smoke inlet, and the other end of the extension plate is connected to the stretching assembly in a direction away from the smoke inlet, and the stretching assembly is used to drive the other end of the extension plate to move in a direction away from the smoke inlet; and

[0011] An exhaust pipe passes through the top plate of the cylinder.

[0012] Furthermore, the stretching assembly comprises:

[0013] A plurality of stoppers fixedly connected to the lower bottom surface of the rotating air inlet pipe, wherein the stoppers are located at a side of the other end of the extension plate away from the smoke inlet; and

[0014] A plurality of tension springs are connected to the plurality of limit heads in a one-to-one correspondence, one end of the tension spring is connected to the other end of the extension plate, the other end of the tension spring is connected to the limit head, and the plurality of tension springs are spaced apart along the width direction of the extension plate.

[0015] Furthermore, a guide roller is rotatably connected to the lower end of the smoke inlet, and the guide roller is frictionally connected to the middle part of the extension plate.

[0016] Furthermore, a plurality of nuts are fixedly connected to the bottom plate of the rotating air inlet duct, and the nuts are threadedly connected to bolts one by one. The bolts penetrate the bottom plate of the rotating air inlet duct and abut against the lower surface of the air guide plate.

[0017] Furthermore, a plurality of guide rods are arranged in the vertical direction in the rotating air inlet pipe, and the air guide plate is slidably connected to the guide rods.

[0018] Furthermore, a plurality of the guide rods are sleeved with a plurality of compression springs in a one-to-one correspondence, the upper ends of the compression springs are connected to the top plate of the rotating air inlet duct, and the lower ends of the compression springs are connected to the air guide plate.

[0019] Furthermore, it also includes a telescopic tube slidably connected to the exhaust pipe.

[0020] Furthermore, it also includes a driving component for driving the telescopic tube to move along the axial direction of the exhaust pipe.

[0021] Furthermore, the driving assembly comprises:

[0022] The side wall of the exhaust pipe located above the cylinder is provided with a sliding groove along the vertical direction; and

[0023] The outer side wall of the side wall of the telescopic tube is fixedly connected with a sliding rod, and the sliding rod is slidably connected with the sliding groove.

[0024] Furthermore, the driving assembly further comprises:

[0025] The sliding rod passes through the sliding slot and is fixedly connected to a driving block;

[0026] A mounting base fixedly connected to the upper end of the cylinder; and

[0027] A drive screw connected to the mounting seat is rotated, and the drive screw is threadedly connected to the drive block.

[0028] Compared with the prior art, the present invention has at least the following advantages:

[0029] ① In the present invention, the air guide plate is movably connected in the cylinder along the vertical direction, one end of the extension plate is connected to the end of the air guide plate close to the smoke inlet, and the other end of the extension plate moves away from the smoke inlet under the action of the stretching assembly, so that the extension plate can always be raised and lowered with the air guide plate, and there will be no situation where one end of the extension plate is reserved above the air guide plate, thereby reducing the impact of one end of the extension plate protruding from the air guide plate on the flow velocity of the smoke in the cyclone separator.

[0030] ② By turning the bolt, the air guide plate can be raised and lowered in the vertical direction, and continuous adjustment can be achieved.

[0031] ③ By rotating the driving screw, the telescopic tube can be moved along the axial direction of the exhaust duct, thereby achieving a continuous adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the overall structure of the cyclone separator used for sampling fly ash from a coal-fired boiler in a thermal power plant according to the present invention;

[0034] Figure 2 A cross-sectional view of a cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to the present invention;

[0035] Figure 3 It is a cross-sectional view from another perspective of the cyclone separator used for sampling fly ash from a coal-fired boiler in a thermal power plant according to the present invention.

[0036] Figure numerals: 1. cylinder; 2. rotating air inlet pipe; 3. smoke inlet; 4. air guide plate; 5. extension plate; 6. limit head; 7. tension spring; 8. guide roller; 9. nut; 10. bolt; 11. guide rod; 12. compression spring; 13. exhaust pipe; 14. telescopic tube; 15. sliding groove; 16. sliding rod; 17. drive block; 18. mounting seat; 19. drive screw. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figure 1-3 The present invention provides a cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant, comprising a cylinder 1, a rotating air inlet pipe 2, an air guide plate 4, an extension plate 5, a stretching assembly and an exhaust pipe.

[0040] The cylinder 1 is the main structure of the cyclone separator, which is used to contain and guide the flow of smoke. The rotating air inlet pipe 2 is connected to the side wall of the cylinder 1, and a smoke inlet 3 is provided at one end thereof away from the cylinder 1. The design of the rotating air inlet pipe 2 helps to make the smoke entering the cylinder 1 undergo a preliminary rotational motion, thereby promoting the separation of dust particles.

[0041] The air guide plate 4 is movably connected in the cylinder 1 along the vertical direction, and is mainly used to adjust the flow rate of the smoke entering the rotating air inlet pipe 2. By adjusting the position of the air guide plate 4, the flow speed and direction of the smoke in the cyclone separator can be controlled, thereby affecting the separation efficiency.

[0042] The extension plate 5 and the stretching assembly are arranged near the smoke inlet 3. One end of the extension plate 5 is connected to the end of the air guide plate 4 near the smoke inlet 3, and the middle part abuts against the lower end of the smoke inlet 3. The other end of the extension plate 5 moves away from the smoke inlet 3 through the stretching assembly. This design allows more precise control by operating the extension plate 5 when the position of the air guide plate 4 needs to be changed. The exhaust pipe runs through the top plate of the cylinder 1 to discharge the treated gas. This ensures that the entire system can work continuously and stably.

[0043] The stretching assembly includes a limit head 6 and a stretching spring 7. The limit head 6 is fixedly connected to the bottom surface of the rotating air inlet pipe 2 and is located at the other end of the extension plate 5 away from the smoke inlet 3. The plurality of limit heads 6 are connected to the stretching springs 7 one by one, one end of the stretching spring 7 is connected to the other end of the extension plate 5, and the other end of the stretching spring 7 is connected to the limit head 6. These stretching springs 7 are arranged at intervals along the width direction of the extension plate 5. This not only increases the stability of the device, but also facilitates users to flexibly adjust according to actual needs.

[0044] A rotatable guide roller 8 is installed below the smoke inlet 3 and is in frictional contact with the middle of the extension plate 5 to help reduce the wear problem caused by excessive friction.

[0045] A plurality of nuts 9 are fixedly connected to the bottom of the rotating air inlet pipe 2 , and each nut 9 is equipped with a corresponding bolt 10 that passes through the bottom plate and abuts against the lower surface of the air guide plate 4 .

[0046] A plurality of vertically arranged guide rods 11 are arranged inside the rotating air inlet pipe 2, and the air guide plate 4 can slide freely on these guide rods 11. At the same time, a compression spring 12 is also provided next to each guide rod 11, and its upper and lower ends are respectively connected to the top plate of the rotating air inlet pipe 2 and the air guide plate 4.

[0047] By rotating the bolt 10 , the air guide plate 4 can be lifted and lowered in the vertical direction, and continuous adjustment can be achieved.

[0048] Preferably, the driving assembly includes: a side wall of the exhaust pipe 13 located above the cylinder 1 is provided with a sliding groove 15 along the vertical direction; and a sliding rod 16 is fixedly connected to the outer side wall of the side wall of the telescopic tube 14, and the sliding rod 16 is slidably connected to the sliding groove 15.

[0049] In addition, the driving assembly also includes a driving block 17, a mounting seat 18 and a driving screw 19. Among them, the sliding rod 16 passes through the sliding groove 15 and is fixedly connected to the driving block 17; the mounting seat 18 is fixedly connected to the upper end of the cylinder 1; the driving screw 19 is rotatably connected to the mounting seat 18, and the driving screw 19 is threadedly connected to the driving block 17.

[0050] By rotating the driving screw 19, the telescopic tube 14 can be moved along the axial direction of the exhaust pipe 13, so that a continuous adjustment effect can be achieved.

[0051] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant, characterized in that: include: Cylinder (1); a rotating air inlet pipe (2) connected to the side wall of the cylinder (1), wherein a smoke inlet (3) is provided at one end of the rotating air inlet pipe (2) away from the cylinder (1); An air guide plate (4) movably connected to the cylinder (1) in a vertical direction; an extension plate (5) and a stretching assembly arranged near the smoke inlet (3), one end of the extension plate (5) being connected to one end of the air guide plate (4) near the smoke inlet (3), a middle portion of the extension plate (5) abutting against the lower end of the smoke inlet (3), and the other end of the extension plate (5) being connected to the stretching assembly in a direction away from the smoke inlet (3), the stretching assembly being used to drive the other end of the extension plate (5) to move in a direction away from the smoke inlet (3); and An exhaust pipe passes through the top plate of the cylinder (1).

2. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 1, characterized in that: The stretching assembly comprises: a plurality of limit heads (6) fixedly connected to the lower bottom surface of the rotating air inlet pipe (2), the limit heads (6) being located on a side of the other end of the extension plate (5) away from the smoke inlet (3); and A plurality of tension springs (7) are connected to the plurality of limit heads (6) in a one-to-one correspondence, one end of the tension spring (7) is connected to the other end of the extension plate (5), and the other end of the tension spring (7) is connected to the limit head (6), and the plurality of tension springs (7) are arranged at intervals along the width direction of the extension plate (5).

3. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 1, characterized in that: The lower end of the smoke inlet (3) is rotatably connected to a guide roller (8), and the guide roller (8) is frictionally connected to the middle part of the extension plate (5).

4. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 3, characterized in that: The bottom plate of the rotating air inlet pipe (2) is fixedly connected with a plurality of nuts (9), and the nuts (9) are threadedly connected with bolts (10) in a one-to-one correspondence. The bolts (10) penetrate the bottom plate of the rotating air inlet pipe (2) and abut against the lower surface of the air guide plate (4).

5. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 4, characterized in that: A plurality of guide rods (11) are arranged in the vertical direction inside the rotating air inlet pipe (2), and the air guide plate (4) is slidably connected to the guide rods (11).

6. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 5, characterized in that: A plurality of the guide rods (11) are sleeved with a plurality of compression springs (12) in a one-to-one correspondence, the upper ends of the compression springs (12) are connected to the top plate of the rotating air inlet pipe (2), and the lower ends of the compression springs (12) are connected to the air guide plate (4).

7. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 6, characterized in that: It also includes a telescopic tube (14) slidably connected to the exhaust tube (13).

8. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 7, characterized in that: It also includes a driving assembly for driving the telescopic tube (14) to move along the axial direction of the exhaust pipe (13).

9. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 8, characterized in that: The drive assembly comprises: The side wall of the exhaust pipe (13) located above the cylinder (1) is provided with a sliding groove (15) along the vertical direction; and A sliding rod (16) is fixedly connected to the outer side wall of the telescopic tube (14), and the sliding rod (16) is slidably connected to the sliding groove (15).

10. The cyclone separator for sampling fly ash from a coal-fired boiler in a thermal power plant according to claim 9, characterized in that: The drive assembly also includes: The sliding rod (16) passes through the sliding groove (15) and is fixedly connected to a driving block (17); a mounting seat (18) fixedly connected to the upper end of the cylinder (1); and A driving screw (19) connected to the mounting seat (18) is rotatably connected, and the driving screw (19) is threadedly connected to the driving block (17).

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