Negative pressure ash removal device for thermal power plant

Abstract

The utility model relates to the technical field of thermal power plant dust removal, and discloses a thermal power plant negative pressure dust removal device which comprises an adsorption cover plate, an adsorption hose, a dust removal device and a negative pressure fan which are sequentially connected, the negative pressure fan is connected with a driving motor through a rotating rod, and the negative pressure fan is provided with an air outlet and an air inlet pipe. The air inlet pipe is connected with the ash removal device through the fixed air base, an air inlet is formed in the upper end of the interior of the adsorption cover plate, a sealing pressing plate is arranged outside the adsorption cover plate, a first air opening and a second air opening are formed in the ash removal device, an open flow channel is formed between the first air opening and the second air opening, and a purification device is arranged in the flow channel. The purification device comprises an inner plate, a baffle, a first filter screen, a second filter screen and a third filter screen, the inner plate is fixedly arranged at the bottom of the baffle, the baffle seals and covers the converging channel, and the first filter screen, the second filter screen and the third filter screen are all fixedly arranged at the bottom of the inner plate. According to the utility model, dust particles can be effectively captured, and dust in flue gas is prevented from being discharged into the atmosphere.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dust removal of thermal power plant, specifically to a negative pressure ash removal device of thermal power plant. BACKGROUND

[0002] Thermal power plant takes coal combustion as the core process, and its flue gas pollutant emission control is the key link of atmospheric pollution prevention and control.

[0003] The basic power generation process of coal-fired generating set usually includes: heating water to generate steam when fuel is burning, converting the chemical energy of fuel into heat energy, steam pressure driving the steam turbine to rotate, converting heat energy into mechanical energy, then the steam turbine drives the generator to rotate, converting mechanical energy into electrical energy, after the fuel is burned, a large amount of dust is contained in its flue gas, and the flue gas is purified by purification equipment and then discharged into the atmosphere through the chimney.

[0004] However, the existing purification equipment has insufficient removal efficiency for small particle size dust in the flue gas, which will be discharged into the atmosphere through the chimney, causing atmospheric pollution. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model aims at providing a negative pressure ash removal device of thermal power plant, which aims at solving the problem of insufficient removal efficiency of small particle size dust in the flue gas by the existing purification equipment.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a negative pressure ash removal device of thermal power plant, including adsorption cover plate, adsorption hose, ash removal device and negative pressure fan which are connected in sequence, the rear end of the negative pressure fan is connected with rotating rod in penetration, the rotating rod is connected with driving motor, the front end of the negative pressure fan is installed with air outlet, the top of the negative pressure fan is fixedly connected with air inlet pipe, the air inlet pipe is connected with the ash removal device through fixed air seat, the inside upper end of the adsorption cover plate is provided with air inlet, the bottom outer end of the adsorption cover plate is provided with sealing pressing plate, the inside left end of the ash removal device is provided with first air port, the inside right end of the ash removal device is provided with second air port, the first air port and the second air port form flow channel with an opening between them, the flow channel is provided with purification device, the purification device includes inner plate, baffle, first filter screen, second filter screen and third filter screen, the inner plate is fixedly arranged at the bottom of the baffle, the baffle seals and covers the flow channel, the first filter screen and the third filter screen are fixedly arranged at the both ends of the bottom of the inner plate respectively, and are symmetrical Z-shaped plate structure, the second filter screen is fixedly arranged at the middle of the bottom of the inner plate, and is straight plate structure.

[0007] In addition, the negative pressure ash removal device of thermal power plant according to the utility model also has the following additional technical features:

[0008] Further, the first filter screen and the third filter screen are made of pp cotton and activated carbon filter core material respectively, and the second filter screen is made by precisely winding textile fiber yarn on a porous framework.

[0009] Further, the material of the textile fiber yarn includes polypropylene fiber, acrylic fiber and absorbent cotton fiber.

[0010] Further, the thermal power plant negative pressure ash removal device further comprises a base, and the negative pressure fan and the bottom of the driving motor are fixed on the base through the mounting seat.

[0011] Further, the outer part of the rotating rod is rotatably connected with an axle bracket, the axle bracket is installed on the upper end of the mounting seat, and the rotating rod is of a split structure and is connected with a shaft coupling.

[0012] Further, the bottom corners of the base are provided with movable wheel sets, the movable wheel set comprises movable wheels, supporting plates, shaft rods, bearings, cross plates, supporting columns, shaft seats and top plates, the top plates are installed on the bottom corners of the base, the supporting columns are fixedly arranged at the bottom middle part of the top plates, the shaft seats are fixedly arranged at the upper end of the cross plates, the supporting columns are rotatably connected with the upper end of the shaft seats, the supporting plates are symmetrically fixedly arranged at the lower end of the cross plates, the shaft rods are fixedly arranged at the lower end between the supporting plates, the bearings are rotatably connected with the outer middle part of the shaft rods, and the movable wheels are fixedly arranged outside the bearings.

[0013] Further, the top of the baffle is fixedly provided with a pull ring.

[0014] Further, the front and rear ends of the ash removal device are provided with positioning holes, the front and rear ends of the baffle are fixedly provided with convex plates, and the lower end of the convex plate is threadedly connected with a positioning bolt matched with the positioning hole.

[0015] Further, the top of the adsorption cover plate is fixedly provided with a lifting device at both ends.

[0016] Further, the corners of the sealing plate are connected with locking bolts, the lower end of the locking bolt is externally sleeved with a sealing gasket, the upper end of the locking bolt is fixedly provided with a nut, and the bottom of the nut is fixedly provided with a nut gasket.

[0017] The utility model discloses an advantageous effect at least includes: through the drive structure control negative pressure fan flexible rotation, can adapt to the dust removal demand under different working conditions, through the mobile wheel group installed in the base bottom corner, make the whole ash removal device can easily move and deploy in the inside of thermal power plant, need not rely on complex hoisting or transport equipment, guarantee the stability of moving, reduced deployment cost, through the ash removal device installed between adsorption hose and fixed wind stand, effectively capture dust particle, carry out classification filtration purification to different particle size's particulate matter, improved purification effect, through the adsorption cover plate and sealing press plate set up in adsorption hose lower extreme, ensure the close adhesion between adsorption cover plate and thermal power plant pipeline surface, effectively prevent the occurrence of air leakage phenomenon, thereby improve the dust removal efficiency, strengthen the sealing performance of equipment, prolong the service life of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view structure schematic drawing of the utility model;

[0019] Figure 2 It is the whole front left upper view angle structure schematic drawing of the utility model;

[0020] Figure 3 It is the whole side rear view angle structure schematic drawing of the utility model;

[0021] Figure 4 It is the adsorption cover plate lower structure schematic drawing of the utility model;

[0022] Figure 5 It is the locking bolt structure schematic drawing of the utility model;

[0023] Figure 6 It is the ash removal device inside one end structure schematic drawing of the utility model;

[0024] Figure 7 It is the ash removal device inside other end structure schematic drawing of the utility model;

[0025] Figure 8 It is the purification device lower view angle structure schematic drawing of the utility model;

[0026] Figure 9 It is the purification device upper view angle structure schematic drawing of the utility model;

[0027] Figure 10 It is the mobile wheel structure schematic drawing of the utility model.

[0028] Main element symbol explanation:

[0029] Suction cover plate 1, air inlet 10, sealing pressure plate 11, locking bolt 12, sealing gasket 121, nut washer 122, nut 123, lifting device 13, suction hose 2, suction seat 21, ash removal device 3, first air inlet 301, second air inlet 302, positioning hole 303, purification device 31, inner plate 311, baffle 312, convex plate 313, first filter screen 314, second filter screen 315, third filter screen 316, pull ring 317, flange plate 32, negative pressure fan 4, air inlet pipe 41, fixed air seat 411, air outlet 42, driving motor 43, shaft coupling 431, shaft bracket 44, mounting seat 45, base 5, moving wheel 51, support plate 511, shaft rod 512, bearing 513, cross plate 514, support column 515, shaft seat 516, top plate 517, mounting plate 6, reinforcing plate 61. DETAILED DESCRIPTION

[0030] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Please refer to Figures 1 to 10This utility model provides a negative pressure ash removal device for a thermal power plant, comprising an adsorption cover plate 1, an adsorption hose 2, an ash removal device 3, and a negative pressure fan 4 connected in sequence. A rotating rod is connected through the rear end of the negative pressure fan 4, and a drive motor 43 is connected to the rotating rod. A mounting base 45 is installed at the bottom of the negative pressure fan 4 and the drive motor 43. The mounting base 45 is fixedly installed on the upper end of a base 5. Movable wheels are installed at the bottom corners of the base 5 for supporting ground movement. A mounting plate 6 is fixedly installed on the inner side of the base 5, and the mounting plate 6 and the base 5 form an L-shaped plate structure. A reinforcing plate 61 is fixed between the front and rear ends of the mounting plate 6 and the base 5. The mounting plate 6 is used to install onto the side wall or upper end of the flue gas exhaust pipe of the thermal power plant. An air outlet 42 is installed at the front end of the negative pressure fan 4, and an air inlet pipe 41 is fixedly connected to the top of the negative pressure fan 4. A fixed air seat 411 is connected to the left end of the air inlet pipe 41. The dust removal device 3 is installed at the left end of the fixed air seat 411. A first air inlet 301 is opened at the left end of the interior of the dust removal device 3, and a second air inlet 302 is opened at the right end. An open flow channel is formed between the first air inlet 301 and the second air inlet 302. The arrangement of the first air inlet 301, the second air inlet 302, and the flow channel provides a smooth passage for airflow. The purification device 31 extends into the flow channel from the opening and is ultimately positioned within the flow channel. The adsorption hose 2 is installed at the left end of the dust removal device 3, and a suction seat 21 is fixedly installed at the bottom of the adsorption hose 2. The adsorption cover plate 1 is fixedly installed at the bottom of the suction seat 21. An air inlet 10 is opened at the upper end of the interior of the adsorption cover plate 1, which is used to introduce air into the adsorption hose 2. A sealing pressure plate 11 is fixedly installed at the outer bottom end of the adsorption cover plate 1.

[0034] In some alternative embodiments, such as Figure 6 , Figure 7 As shown, flange plates 32 are fixed at both ends of the ash removal device 3. The flange plates 32 are used to quickly disassemble and install the ash removal device 3 between the adsorption hose 2 and the fixed air seat 411.

[0035] In some alternative embodiments, such as Figure 6 , Figure 7 As shown, the ash removal device 3 has positioning holes 303 distributed at its front and rear ends. The purification device 31 includes an inner plate 311 and a baffle 312. The inner plate 311 is fixedly installed at the bottom of the baffle 312. The front and rear ends of the baffle 312 are fixedly distributed with protruding plates 313. The lower end of the protruding plate 313 is threaded through and connected with a positioning bolt that mates with the positioning hole 303, so as to facilitate the disassembly and assembly of the baffle 312 and the ash removal device 3.

[0036] In some alternative embodiments, such as Figure 9 As shown, a pull ring 317 is fixedly provided on the top of the baffle 312. The pull ring 317 is used for hand-held disassembly and assembly of the purification device 31, making operation more convenient.

[0037] In some alternative embodiments, as shown in Figure 8 , Figure 9 the purification device 31 further comprises a first filter screen 314, a second filter screen 315 and a third filter screen 316. The first filter screen 314 and the third filter screen 316 are both symmetric Z-shaped plate structures and are respectively fixed at the two ends of the bottom of the inner plate 311. The second filter screen 315 is a straight plate structure and is fixed at the middle of the bottom of the inner plate 311. In this embodiment, the first filter screen 314 and the third filter screen 316 with Z-shaped plate structure and the second filter screen 315 with straight plate structure greatly improve the dust removal effect.

[0038] In some alternative embodiments, the first filter screen 314 and the third filter screen 316 are made of pp cotton and activated carbon filter core materials respectively, which can effectively filter impurities in dust. The second filter screen 315 is made of textile fiber yarn precisely wound on a porous framework. Alternatively, the yarn material includes polypropylene fiber, acrylic fiber and cotton fiber.

[0039] In some alternative embodiments, as shown in Figure 3 the rotating rod is externally rotatably connected with a shaft bracket 44, and the shaft bracket 44 is installed at the upper end of the mounting seat 45. The rotating rod is of a split structure and is connected with a shaft coupling 431. In this embodiment, the shaft bracket 44 is used to stably support the rotation of the rotating rod to avoid jamming, and the shaft coupling 431 is used to link the rotating rod.

[0040] In some alternative embodiments, as shown in Figure 10 the bottom corners of the base 5 are each installed with a moving wheel set. The moving wheel set comprises a moving wheel 51, a support plate 511, a shaft rod 512, a bearing 513, a cross plate 514, a support column 515, a shaft seat 516 and a top plate 517. The top plate 517 is installed at the bottom corner of the base 5. The support column 515 is fixedly arranged at the middle of the bottom of the top plate 517. The shaft seat 516 is fixedly arranged at the upper end of the cross plate 514. The support column 515 is rotatably connected to the upper end of the shaft seat 516. The support plates 511 are symmetrically fixedly arranged at the lower end of the cross plate 514. The shaft rods 512 are fixedly arranged at the lower ends between the support plates 511. The bearings 513 are rotatably connected to the middle of the outer part of the shaft rods 512. The moving wheels 51 are fixedly arranged at the outer part of the bearings 513. In this embodiment, the top plate 517 is used to install the moving wheel set to the bottom of the base 5. The support column 515 and the shaft seat 516 are used for omnidirectional rotation adjustment. The bearing 513 is used to support the rotating moving wheel 51.

[0041] In some alternative embodiments, as shown in Figure 4 the top two ends of the adsorption cover plate 1 are fixedly provided with a lifting device 13. In this embodiment, the lifting device 13 is used for two-handed operation of the adsorption cover plate 1.

[0042] In some alternative embodiments, as shown inFigure 4 、 Figure 5 As shown in the drawings, the locking bolt 12 is connected through the corner of the sealing pressing plate 11, the lower end of the locking bolt 12 is externally sleeved with a sealing gasket 121, the upper end of the locking bolt 12 is fixedly provided with a nut 123, and the bottom of the nut 123 is fixedly provided with a nut gasket 122. In this embodiment, the locking bolt 12 is used to fasten and install the sealing pressing plate 11 to the outer surface of the power plant pipeline, and the sealing gasket 121 and the nut gasket 122 are both used for sealing installation and improving the fastening degree.

[0043] It should be noted that the specific model and specifications need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail. The power supply and its principle are clear to those skilled in the art, and will not be described in detail here.

[0044] Example 1

[0045] The whole device is supported by the ground through the plurality of moving wheels 51 at the lower end of the base 5 and moves to stop beside the power plant pipeline;

[0046] The sealing pressing plate 11 is pressed and combined to the power plant pipeline by the lifting device 13 held by both hands, and the locking bolt 12 is sealed and installed through the corner of the sealing pressing plate 11, the sealing gasket 121 and the nut gasket 122;

[0047] The driving motor 43 is started to automatically control the rotation of the coupling 431, so that the wind blade in the negative pressure fan 4 rotates, air is sucked through the air inlet pipe 41 and the fixed air seat 411, and air is discharged from the air outlet 42;

[0048] Air is sucked through the air inlet 10 of the adsorption cover plate 1, the multi-angle curved air inlet of the adsorption hose 2, and the first air inlet 301 of the dust removal device 3, so that the first filter screen 314, the second filter screen 315 and the third filter screen 316 of the purification device 31 are filtered and purified, and then enter the fixed air seat 411 from the second air inlet 302;

[0049] The flange plate 32 can be disassembled for maintenance, and the first filter screen 314, the second filter screen 315 and the third filter screen 316 of the purification device 31 can be conveniently maintained and replaced by disassembling the flange plate 32.

[0050] Example 2

[0051] The whole device is installed to the outside of the power plant pipeline through the mounting plate 6;

[0052] The sealing pressing plate 11 is pressed and combined to the power plant pipeline by the lifting device 13 held by both hands, and the locking bolt 12 is sealed and installed through the corner of the sealing pressing plate 11, the sealing gasket 121 and the nut gasket 122;

[0053] The drive motor 43 is started to automatically control the coupling 431 to rotate, which causes the internal fan blades of the negative pressure fan 4 to rotate. Air is drawn in through the air inlet pipe 41 and the fixed fan seat 411 and then discharged from the air outlet 42.

[0054] Air enters through the air inlet 10 of the adsorption cover plate 1, then through the adsorption hose 2 which bends at multiple angles, and then through the first air inlet 301 of the dust removal device 3. After being filtered and purified by the first filter screen 314, the second filter screen 315 and the third filter screen 316 of the purification device 31, the air enters the fixed air seat 411 from the second air inlet 302.

[0055] The protruding plate 313 can be removed by hand using the pull ring 317, making it convenient to maintain and replace the first filter 314, second filter 315 and third filter 316 of the purification device 31. The flange plate 32 can be removed for maintenance.

[0056] This utility model comprises an adsorption cover plate 1, an air inlet 10, a sealing pressure plate 11, a locking bolt 12, a sealing gasket 121, a nut and washer ring 122, a nut 123, a lifting device 13, an adsorption hose 2, an air suction base 21, a dust removal device 3, a first air outlet 301, a second air outlet 302, a positioning hole 303, a purification device 31, an inner plate 311, a baffle 312, a protruding plate 313, a first filter screen 314, a second filter screen 315, a third filter screen 316, and a pull ring 317. Flange plate 32, negative pressure fan 4, air inlet pipe 41, fixed fan seat 411, air outlet 42, drive motor 43, coupling 431, shaft bracket 44, mounting base 45, base 5, caster wheel 51, support plate 511, shaft 512, bearing 513, cross plate 514, support column 515, shaft seat 516, top plate 517, mounting plate 6, reinforcing plate 61. All components are general standard parts or parts known to those skilled in the art, and their structure and principles are readily understood by those skilled in the art. According to technical manuals or conventional experimental methods, this utility model, through the combination of the above-mentioned components and the flexible rotation of the negative pressure fan 4 controlled by the drive structure, can adapt to dust removal needs under different working conditions. The movable wheels installed at the bottom corner of the base 5 allow the entire ash removal device to be easily moved and deployed within the thermal power plant without relying on complex hoisting or transportation equipment, ensuring stable movement and reducing deployment costs. The ash removal device 3 installed between the adsorption hose 2 and the fixed fan seat 411 effectively captures dust particles, performing graded filtration and purification for particles of different sizes, thus improving the purification effect. The adsorption cover plate 1 and sealing pressure plate 11 installed at the lower end of the adsorption hose 2 ensure a tight fit between the adsorption cover plate 1 and the surface of the thermal power plant pipeline, effectively preventing air leakage, thereby improving dust removal efficiency, enhancing the sealing performance of the equipment, and extending the service life of the equipment.

[0057] The basic principle and main features of the present application and the advantages of the present application are shown and described above. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0058] In addition, it should be understood that, although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A negative pressure ash removal device for a thermal power plant, characterized in that, The device includes an adsorption cover plate, an adsorption hose, a dust removal device, and a negative pressure fan connected in sequence. A rotating rod is connected to the rear end of the negative pressure fan, and a drive motor is connected to the rotating rod. An air outlet is installed at the front end of the negative pressure fan, and an air inlet pipe is fixedly connected to the top of the negative pressure fan. The air inlet pipe is connected to the dust removal device via a fixed air seat. An air inlet is opened at the upper interior of the adsorption cover plate, and a sealing pressure plate is provided at the outer bottom of the adsorption cover plate. A first air outlet is opened at the left interior of the dust removal device. A second air vent is provided at the right end of the part. An open flow channel is formed between the first air vent and the second air vent. A purification device is provided in the flow channel. The purification device includes an inner plate, a baffle, a first filter, a second filter, and a third filter. The inner plate is fixed to the bottom of the baffle, and the baffle seals and covers the flow channel. The first filter and the third filter are respectively fixed to the bottom ends of the inner plate and are both symmetrical Z-shaped plate structures. The second filter is fixed to the bottom middle of the inner plate and is a straight plate structure.

2. The negative pressure ash removal device for thermal power plants according to claim 1, characterized in that, The first filter and the third filter are made of PP cotton and activated carbon filter material, respectively, and the second filter is made of textile fiber yarn precisely wound on a porous skeleton.

3. The negative pressure ash removal device for thermal power plants according to claim 2, characterized in that, The textile fiber yarns are made of polypropylene fiber, acrylic fiber and degreased cotton fiber.

4. The negative pressure ash removal device for thermal power plants according to claim 1, characterized in that, The negative pressure ash removal device for thermal power plants also includes a base, and the bottoms of the negative pressure fan and the drive motor are both fixed to the base by mounting brackets.

5. The negative pressure ash removal device for thermal power plants according to claim 4, characterized in that, The rotating rod is externally rotatably connected to a shaft bracket, which is mounted on the upper end of the mounting base. The rotating rod has a split structure and is connected to a coupling.

6. The negative pressure ash removal device for thermal power plants according to claim 4, characterized in that, Each corner of the base is equipped with a set of movable wheels, which includes a movable wheel, a support plate, a shaft, a bearing, a cross plate, a support column, a bearing seat, and a top plate. The top plate is installed at the bottom corner of the base, the support column is fixed at the bottom middle of the top plate, the bearing seat is fixed at the upper end of the cross plate, and the support column is rotatably connected to the upper end of the bearing seat. The support plates are symmetrically and fixedly distributed at the lower end of the cross plate, the shaft is fixedly installed near the lower end between the support plates, the bearing is rotatably connected to the outer middle of the shaft, and the movable wheel is fixed to the outside of the bearing.

7. The negative pressure ash removal device for thermal power plants according to any one of claims 1 to 6, characterized in that, A pull ring is fixedly provided on the top of the baffle.

8. The negative pressure ash removal device for thermal power plants according to any one of claims 1 to 6, characterized in that, The ash removal device has positioning holes at its front and rear ends, and the baffle has protruding plates fixedly distributed at its front and rear ends. The lower end of the protruding plate is threaded through and connected to a positioning bolt that mates with the positioning hole.

9. The negative pressure ash removal device for thermal power plants according to any one of claims 1 to 6, characterized in that, The top two ends of the adsorption cover are fixed with lifting devices.

10. The negative pressure ash removal device for thermal power plants according to any one of claims 1 to 6, characterized in that, A locking bolt is connected through the corner of the sealing plate. A sealing gasket is sleeved on the lower end of the locking bolt. A nut is fixed on the upper end of the locking bolt, and a nut washer is fixed on the bottom of the nut.

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