Flue gas dust removal and denitration device based on coal-fired boiler of power plant

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a flue gas dust removal and denitration device based on a coal-fired boiler of a power plant, which comprises a platform, a flue gas filtering mechanism is arranged on the platform and is used for flue gas dust removal, and the flue gas filtering mechanism comprises a main body assembly, a plurality of box bodies and a plurality of flue gas purification devices, the mounting assembly comprises a pattern plate fixed in the box body; when the filter assembly is installed, the filter assembly is inserted into the tubesheet from bottom to top, and the installation head penetrates through the limiting notch from bottom to top; then a pin rod is pressed to drive an extrusion head to move downwards, the filtering assembly is rotated by 45 degrees clockwise, a mounting head drives the pin rod to slide into an arc-shaped notch from a limiting notch, then the pressed pin rod is released, the pin rod is pushed to move upwards through the springback pressure of a spring, and the pin rod drives the extrusion head to press the pattern plate; therefore, the filter assemblies are positioned in the mounting holes in the pattern plate, so that the filter assemblies cannot shake after being mounted, and a plurality of subsequent filter assemblies can be conveniently fixed together.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology used in chemical industries that produce a lot of nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution, so the application of this technology has many benefits for environmental air purification.

[0003] According to the publication number: CN221619064U, a boiler flue gas nitrogen oxide catalytic denitrification device is disclosed. This technology discloses "a boiler flue gas nitrogen oxide catalytic denitrification device, including a flue gas duct, a bag dust collector, a smoke conveying duct, a photocatalytic reaction device, a denitrification device and a chimney, the output end of the flue gas duct is connected to the input end of the bag dust collector, the bag dust collector is connected to a heat exchanger, the heat exchanger is connected to the smoke conveying duct, and the photocatalytic reaction device includes an outer shell, a homogenizing disk, a corrosion-resistant supporting plate, a metal mesh frame, a catalyst filler and a light source." The technical effects include "a homogenizing disk is provided on the top of the photocatalytic reaction device to homogenize the flue gas, and the flue gas is diverted and contacts the catalyst fillers on opposite sides of the corrosion-resistant supporting plate. The contact is sufficient to effectively oxidize nitric oxide, and then it is sent to the denitrification device for denitrification, thereby achieving efficient denitrification of boiler flue gas."

[0004] Because dust collectors are equipped with numerous filter bags, these must be manually removed and installed one by one during maintenance. This is especially true when all filter bags need to be removed, thoroughly cleaned, and then reinstalled. Each filter bag must undergo the tedious process of reinstallation and securing. This one-by-one handling significantly increases maintenance time and significantly impacts worker efficiency. Utility Model Content

[0005] In response to the deficiencies of the prior art, the utility model provides a flue gas dust removal and pinning device based on a coal-fired boiler in a power plant. When installing the filter assembly, the filter assembly is inserted into the flower plate from bottom to top, and the installation head passes through the limit slot from bottom to top; then the pin rod is pressed to drive the extrusion head to move downward, and the filter assembly is rotated 45° clockwise, so that the installation head drives the pin rod to slide from the limit slot to the arc-shaped slot, and then the pressed pin rod is released and the pressure of the spring rebound is used to push the pin rod upward, and the pin rod drives the extrusion head to press the flower plate, thereby positioning the filter assembly in the installation hole on the flower plate, so that the filter assembly will not shake after installation, which is convenient for fixing several subsequent filter assemblies together.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flue gas dust removal and desulfurization device based on a coal-fired boiler in a power plant, comprising a platform, on which a flue gas filtering mechanism is provided for flue gas dust removal, the flue gas filtering mechanism comprising:

[0007] A main assembly, including a plurality of boxes mounted on a platform;

[0008] The mounting assembly includes a flower plate fixed inside the box, a plurality of mounting holes provided on the flower plate, limiting notches provided at both ends of the mounting holes, and an arc-shaped notch provided at the other end of the limiting notches;

[0009] The filter assembly includes a ring seat installed in the mounting hole, a fixed frame at the bottom of the ring seat, a filter bag fixed at the lower end of the ring seat and sleeved on the frame, a mounting head fixed at both ends of the ring seat, a pin rod slidingly installed inside the mounting head, an extrusion head fixed at the bottom of the pin rod, and a spring installed inside the mounting head and sleeved on the pin rod.

[0010] Preferably, the mounting assembly further comprises guide rods slidingly mounted on the four corners of the flower plate, a hole plate fixed between the tops of the four guide rods, a bolt rod threadedly mounted through the middle of the hole plate, and the lower end of the bolt rod is rotatably mounted on the flower plate.

[0011] Preferably, the main body assembly further includes a box door installed at the front end of the box body, and a dust cleaning system installed on the box body is used for dust removal.

[0012] Preferably, the dust cleaning system includes an air bag fixed at the rear end of the box, multiple pulse valves installed on the air bag, a blow pipe installed on the pulse valve and extending to the inside of the box, and a reinforcement frame fixed to the inner wall of the front end of the box and used to fix the blow pipe.

[0013] Preferably, the smoke filtering mechanism further includes a sealing ring installed on the top of the ring seat.

[0014] Preferably, the upper ends of the boxes are connected to a fixed upper pipe, the end of the upper pipe is connected to a fixed filter, the other end of the filter is connected to a fixed reactor, and the lower ends of the boxes are connected to a fixed lower pipe, the end of the lower pipe is connected to a fixed chimney.

[0015] Beneficial effects

[0016] The utility model provides a flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant. Compared with the existing technology, it has the following advantages:

[0017] (1) When installing the filter assembly, insert the filter assembly into the flower plate from bottom to top, and pass the installation head through the limit slot from bottom to top; then press the pin rod to drive the extrusion head to move downward, and rotate the filter assembly clockwise 45 degrees, so that the installation head drives the pin rod to slide from the limit slot to the arc slot, and then release the pressed pin rod and push the pin rod upward by the pressure of the spring rebound. The pin rod drives the extrusion head to press the flower plate, thereby positioning the filter assembly in the installation hole on the flower plate, so that the filter assembly will not shake after being installed, which is convenient for fixing several subsequent filter assemblies together.

[0018] (2) By rotating the bolt rod clockwise and driving the orifice plate downward with the cooperation of the guide rod, the orifice plate presses down and fixes each filter component at the same time; and, when releasing the fixation, just rotate the bolt rod counterclockwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the smoke filtering mechanism in the present utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the smoke filter mechanism in the utility model;

[0022] Figure 4 It is a cross-sectional view of the installation component in the present utility model;

[0023] Figure 5 This is a structural diagram of the center plate of the utility model;

[0024] Figure 6 It is a cross-sectional view of the filter assembly in the present utility model;

[0025] Figure 7 For this utility model Figure 6 Schematic diagram of the structure of local A in the figure.

[0026] In the figure: 1. Platform; 2. Flue gas filtering mechanism; 21. Main assembly; 211. Box body; 212. Box door; 213. Cleaning system; 2131. Air bag; 2132. Pulse valve; 2133. Injection pipe; 2134. Reinforcement frame; 22. Mounting assembly; 221. Flower plate; 222. Mounting hole; 223. Limiting notch; 224. Arc notch; 225. Guide rod; 226. Orifice plate; 227. Bolt rod; 23. Filter assembly; 231. Ring seat; 232. Skeleton; 233. Filter bag; 234. Mounting head; 235. Pin rod; 236. Extrusion head; 237. Spring; 24. Sealing ring; 3. Upper pipe; 4. Filter; 5. Reactor; 6. Lower pipe; 7. Chimney. DETAILED DESCRIPTION

[0027] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1 - Figure 7 The utility model provides a technical solution: a flue gas dust removal and desulfurization device based on a coal-fired boiler in a power plant, comprising a platform 1, a flue gas filtering mechanism 2 is provided on the platform 1 and is used for flue gas dust removal, and the flue gas filtering mechanism 2 comprises:

[0029] The main assembly 21 includes a plurality of boxes 211 mounted on the platform 1;

[0030] The mounting assembly 22 includes a flower plate 221 fixed to the interior of the box 211, a plurality of mounting holes 222 defined in the flower plate 221, limiting notches 223 defined at both ends of the mounting holes 222, and an arc-shaped notch 224 defined at the other end of the limiting notch 223;

[0031] The filter assembly 23 includes a ring seat 231 installed in the mounting hole 222, a frame 232 fixed at the bottom of the ring seat 231, a filter bag 233 fixed at the lower end of the ring seat 231 and sleeved on the frame 232, a mounting head 234 fixed at both ends of the ring seat 231, a pin rod 235 slidingly installed inside the mounting head 234, an extrusion head 236 fixed at the bottom of the pin rod 235, and a spring 237 installed inside the mounting head 234 and sleeved on the pin rod 235.

[0032] In this embodiment, when installing the filter assembly 23, the filter assembly 23 is inserted into the flower plate 221 from bottom to top, and the installation head 234 passes through the limiting slot 223 from bottom to top; then the pin rod 235 is pressed to drive the extrusion head 236 to move downward, and the filter assembly 23 is rotated 45° clockwise, so that the installation head 234 drives the pin rod 235 to slide from the limiting slot 223 to the arc-shaped slot 224, and then the pressed pin rod 235 is released and the pressure of the spring 237 rebounds to push the pin rod 235 upward, and the pin rod 235 drives the extrusion head 236 to press the flower plate 221, thereby positioning the filter assembly 23 in the installation hole 222 on the flower plate 221, so that the filter assembly 23 will not shake after being installed, which is convenient for fixing several subsequent filter assemblies 23 together.

[0033] Specifically, the mounting assembly 22 also includes guide rods 225 that are slidably installed at the four corners of the flower plate 221, a hole plate 226 fixed between the tops of the four guide rods 225, a bolt rod 227 with a threaded installation passing through the middle of the hole plate 226, and the lower end of the bolt rod 227 is rotatably installed with the flower plate 221.

[0034] In this embodiment, after several filter assemblies 23 are installed in the corresponding mounting holes 222 on the flower plate 221, the orifice plate 226 is driven downward by rotating the bolt rod 227 and with the cooperation of the guide rod 225, so that the orifice plate 226 presses down and fixes each filter assembly 23 at the same time.

[0035] Specifically, the main body assembly 21 further includes a box door 212 installed at the front end of the box body 211, and a dust cleaning system 213 installed on the box body 211 for removing dust.

[0036] In this embodiment, by standing on the platform 1 and opening the box door 212 , it is convenient to operate the installation component 22 and the filter component 23 inside the box body 211 .

[0037] Specifically, the cleaning system 213 includes an air bag 2131 fixed at the rear end of the box body 211, multiple pulse valves 2132 installed on the air bag 2131, a blow pipe 2133 installed on the pulse valve 2132 and extending to the interior of the box body 211, and a reinforcement frame 2134 fixed to the inner wall of the front end of the box body 211 and used to fix the blow pipe 2133.

[0038] In this embodiment, when the dust on the filter bag 233 is too thick to affect filtration, the pulse valve 2132 can be opened, and the compressed air can expand rapidly in a very short time and flow into the filter assembly 23, causing the filter bag 233 to expand, deform and vibrate. Under the action of the reverse airflow, the dust attached to the outer surface of the filter bag 233 is peeled off, thereby achieving cleaning.

[0039] Specifically, the smoke filtering mechanism 2 further includes a sealing ring 24 installed on the top of the ring seat 231 .

[0040] In this embodiment, when the orifice plate 226 presses down and compacts the filter assembly 23 , the sealing performance between the two can be improved through the sealing ring 24 .

[0041] Specifically, the upper ends of the boxes 211 are connected to a fixed upper pipe 3, the end of the upper pipe 3 is connected to a fixed filter 4, the other end of the filter 4 is connected to a fixed reactor 5, and the lower ends of the boxes 211 are connected to a fixed lower pipe 6, the end of the lower pipe 6 is connected to a fixed chimney 7.

[0042] In this embodiment, after the flue gas from the coal-fired boiler of the power plant is discharged into the reactor 5, the nitrogen oxides in the flue gas are reduced to nitrogen and water by a reducing agent under the action of a catalyst; the remaining is then filtered through a filter 4 and enters the flue gas filtration mechanism 2 from the upper pipe 3 for dust removal, and finally is discharged to the outside from the chimney 7 through the lower pipe 6.

[0043] The working principle and usage process of the present invention are as follows: First, when installing the filter assembly 23, the filter assembly 23 is inserted into the flower plate 221 from bottom to top, and the installation head 234 passes through the limiting notch 223 from bottom to top; then the pin rod 235 is pressed to drive the extrusion head 236 to move downward, and the filter assembly 23 is rotated 45 degrees clockwise, so that the installation head 234 drives the pin rod 235 to slide from the limiting notch 223 to the arc-shaped notch 224, and then the pressed pin rod 235 is released, and the pressure of the spring 237 rebounds and pushes the pin rod 235 upward, and the pin rod 235 drives the extrusion head 236 to press the flower plate 221, thereby positioning the filter assembly 23 in the installation hole 222 on the flower plate 221;

[0044] Then, the orifice plate 226 is driven downward by rotating the bolt rod 227 and in cooperation with the guide rod 225 , so that the orifice plate 226 presses down and fixes each filter assembly 23 at the same time.

[0045] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas dust removal and de-dusting device based on a coal-fired boiler in a power plant, comprising a platform (1), characterized in that: The platform (1) is provided with a smoke filtering mechanism (2) for smoke dust removal, and the smoke filtering mechanism (2) comprises: A main assembly (21) includes a plurality of boxes (211) mounted on the platform (1); The mounting assembly (22) includes a flower plate (221) fixed inside the box (211), a plurality of mounting holes (222) provided on the flower plate (221), limiting notches (223) provided at both ends of the mounting holes (222), and an arc-shaped notch (224) provided at the other end of the limiting notch (223); The filter assembly (23) comprises a ring seat (231) mounted in the mounting hole (222), a frame (232) fixed at the bottom of the ring seat (231), a filter bag (233) fixed at the lower end of the ring seat (231) and sleeved on the frame (232), a mounting head (234) fixed at both ends of the ring seat (231), a pin rod (235) slidingly mounted inside the mounting head (234), an extrusion head (236) fixed at the bottom of the pin rod (235), and a spring (237) mounted inside the mounting head (234) and sleeved on the pin rod (235).

2. The flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant according to claim 1 is characterized in that: The mounting assembly (22) further includes guide rods (225) slidably mounted on the four corners of the flower plate (221), a hole plate (226) fixed between the tops of the four guide rods (225), a bolt rod (227) threadedly mounted through the middle of the hole plate (226), and the lower end of the bolt rod (227) is rotatably mounted on the flower plate (221).

3. The flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant according to claim 1 is characterized in that: The main body assembly (21) further comprises a box door (212) installed at the front end of the box body (211), and a dust cleaning system (213) installed on the box body (211) for removing dust.

4. The flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant according to claim 3 is characterized in that: The dust cleaning system (213) includes an air bag (2131) fixed to the rear end of the box (211), a plurality of pulse valves (2132) installed on the air bag (2131), a blowpipe (2133) installed on the pulse valve (2132) and extending into the interior of the box (211), and a reinforcement frame (2134) fixed to the inner wall of the front end of the box (211) and used to fix the blowpipe (2133).

5. The flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant according to claim 1 is characterized in that: The smoke filtering mechanism (2) further comprises (24) mounted on the top of the ring seat (231).

6. The flue gas dust removal and denitrification device based on a coal-fired boiler in a power plant according to claim 1 is characterized in that: The upper ends of the boxes (211) are connected to a fixed upper pipe (3), the end of the upper pipe (3) is connected to a fixed filter (4), the other end of the filter (4) is connected to a fixed reactor (5), and the lower ends of the boxes (211) are connected to a fixed lower pipe (6), the end of the lower pipe (6) is connected to a fixed chimney (7).

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