Waste heat recovery type flue gas desulfurization and denitrification equipment and operation method thereof

Abstract

The present invention discloses a waste heat recovery type flue gas desulfurization and denitrification equipment and its operation method, the equipment includes a base, a filter assembly, a heat exchange assembly and a desulfurization assembly; a denitrification assembly is provided in the heat exchange assembly; the filter assembly includes a filter tank and a filter plate provided in the filter tank; the heat exchange assembly includes a heat exchange cylinder, a hollow tube clamped in the heat exchange cylinder and a heat exchange fan blade provided on the hollow tube; the denitrification assembly includes a carrier plate provided on the hollow tube and a water collecting box provided at the bottom end of the heat exchange cylinder; the desulfurization assembly includes a desulfurization box, an air uniforming component, a desulfurizer injection component, and an air compressor; the equipment structure of the present invention is reasonably designed, and by filtering and pre-treating the flue gas, particulate matter in the flue gas can be prevented from clogging the equipment connecting pipelines; by arranging the heat exchange fan blades inside the heat exchange cylinder, not only the resource utilization of the flue gas waste heat is realized, but also the damage to the equipment components caused by excessively high flue gas temperature can be avoided, thereby improving the desulfurization and denitrification effect of the equipment on the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization and denitrification, and in particular to a waste heat recovery type flue gas desulfurization and denitrification equipment and an operation method thereof. Background Art

[0002] Flue gas desulfurization and denitrification (FGD) is an environmental protection technology used to purify flue gas from industrial boilers. It primarily removes sulfur oxides (SOx) and nitrogen oxides (NOx), which are major sources of air pollution. The development and application of FGDD technology is crucial for improving ambient air quality. Currently, known FGDD technologies include various methods, such as wet desulfurization, dry desulfurization, selective catalytic reduction (SCR) denitrification, and selective non-catalytic reduction (SNCR) denitrification.

[0003] However, since the flue gas contains not only sulfur dioxide and nitrogen dioxide, but also particulate dust, when used for a long time, the pipes inside the desulfurization and denitrification equipment are easily clogged by smoke and dust, and are difficult to clean, resulting in a decrease in its service life; at the same time, since the temperature of the flue gas is high, it not only affects the flue gas denitrification efficiency, but also leads to waste of heat in the flue gas. Summary of the Invention

[0004] In response to the above-mentioned technical problems, the present invention provides a waste heat recovery flue gas desulfurization and denitrification equipment and an operation method thereof.

[0005] The technical solution of the present invention is: a waste heat recovery type flue gas desulfurization and denitrification equipment, comprising a base, a filter component, a heat exchange component and a desulfurization component arranged on the base and connected to each other; a denitrification component is arranged inside the heat exchange component;

[0006] The filter assembly includes a filter tank disposed on a base and a filter disc disposed inside the filter tank;

[0007] The heat exchange assembly includes a heat exchange cylinder arranged on the base, a hollow tube clamped inside the heat exchange cylinder, and a heat exchange fan blade arranged on the hollow tube; a water outlet pipe and a water inlet pipe are respectively arranged at both ends of the heat exchange cylinder;

[0008] The denitration component includes a carrier plate mounted on a hollow tube and a water collecting box at the bottom of the heat exchanger tube. The carrier plate is filled with a denitration catalyst. The denitration catalyst uses V2O5 with a particle size of 30 to 50 μm.

[0009] The desulfurization component includes a desulfurization box, an air uniforming component and a desulfurizer injection component arranged inside the desulfurization box, and an air compressor arranged on a base; the air uniforming component includes an air uniforming plate arranged at the top of the desulfurization box and an air uniforming branch pipe arranged at the lower bottom surface of the air uniforming plate; a plurality of air outlet grooves are distributed circumferentially on the side wall of the air uniforming branch pipe; the desulfurizer injection component includes a desulfurizer storage tank arranged at the bottom of the desulfurization box and an injection support arranged on the upper end surface of the desulfurizer storage tank; a vertical pipe is arranged on the injection support, and a nozzle is arranged on the vertical pipe; the air compressor is connected to the desulfurizer storage tank.

[0010] Furthermore, a plurality of filter discs are provided, each of which is arranged side by side up and down inside the filter tank; the aperture of each filter disc increases from top to bottom; a rotating shaft that passes through each filter disc in sequence is rotatably engaged at the top of the filter tank; a cleaning scraper located below each filter disc is sleeved on the rotating shaft; each cleaning scraper is respectively in contact with the lower bottom surface of each filter disc in a one-to-one correspondence; a first bevel gear is sleeved on the bottom end of the rotating shaft;

[0011] The hollow tube is rotatably clamped inside the heat exchange cylinder, and the water outlet pipe and the water inlet pipe are respectively connected to the hollow tube through a rotary joint; an auxiliary shaft passing through the filter tank is provided at one end of the hollow tube close to the filter tank; a second bevel gear is sleeved on the auxiliary shaft and meshed with the first bevel gear;

[0012] Description: After entering the heat exchange cylinder, the high-pressure flue gas impacts the heat exchange fan blades, which drive the hollow tube and the auxiliary shaft to rotate simultaneously, so that the rotating shaft rotates under the meshing action of the first bevel gear and the second bevel gear, and drives each cleaning scraper to rotate at the bottom of the corresponding filter disc, cleaning the smoke and dust particles blocked at the bottom of the filter disc, thereby ensuring the reliability of the filter disc.

[0013] Furthermore, a sealing plate is provided inside the hollow tube at a position corresponding to each heat exchange blade; the heat exchange blade is composed of a plurality of blades, each of which is spirally provided with a heat exchange coil, and the two ends of each heat exchange coil are respectively connected to the two sides of the sealing plate located at the corresponding position inside the hollow tube;

[0014] Note: After the external water source enters the hollow tube, it passes through the heat exchange coil on each blade in turn under the action of the sealing plate, which is beneficial to improving the heat exchange efficiency of the heat exchange fan blades, thereby improving the utilization rate of the waste heat in the flue gas.

[0015] Furthermore, the carrier plate includes an inner chuck sleeved on the hollow tube, an outer chuck rotatably clamped on the inner side wall of the heat exchange cylinder, and two grids slidably clamped between the inner chuck and the outer chuck; the denitration catalyst is filled in the area between the inner chuck, the outer chuck and the two grids; and a compression spring is provided inside each of the inner and outer chucks on the side away from each other of the two grids.

[0016] Furthermore, the inner side of the outer chuck is provided with a toggle frame which is sleeved on the outside of the hollow tube and is slidably engaged with the inner wall of the outer chuck through a clamping block. A return spring is provided on the inner wall of the outer chuck to abut against the clamping block. An inner gear ring is provided on the inner side of the toggle frame. An incomplete gear is sleeved on the hollow tube and meshed with the inner gear ring.

[0017] Description: By movably connecting the two grids between the inner chuck and the outer chuck, the two grids are brought close to each other under the action of the compression spring, so that the denitrification catalyst is always in a compressed state, preventing the flue gas from slipping through the gaps between the denitrification catalysts; at the same time, during the rotation of the hollow tube, the meshing action of the incomplete gear and the inner ring gear is utilized to make the toggle frame swing back and forth inside the outer chuck, to toggle the denitrification catalyst, which is beneficial to improve the contact efficiency between the flue gas and the denitrification catalyst.

[0018] Furthermore, a reversing pipe is provided on the outer side wall of the gas-uniform branch pipe and at a position corresponding to each gas outlet slot;

[0019] Each injection support is rotatably connected to the desulfurization agent storage tank, and a limit frame located above the desulfurization agent storage tank is provided inside the desulfurization box; each injection support passes through the limit frame, and each injection support is sleeved with a swing gear; a rack integrated frame is slidably connected to the limit frame and meshed with each swing gear at the same time, and a sliding rod passing through the desulfurization box is provided on the rack integrated frame; a swing motor is provided on the outer wall of the desulfurization box, and the output end of the swing motor is connected to a swing disk, and the swing disk and the slide rod are movably hinged by a pull rod;

[0020] Description: By setting the reversing pipe, the flue gas discharged from the gas uniforming branch pipe is distributed in a ring shape, which is beneficial to prolonging the contact time between the flue gas and the desulfurizer; at the same time, the swing motor is used to drive the swing plate to rotate. During the rotation of the swing plate, the pull rod is used to push the slide bar to move back and forth on the desulfurization box, so that the rack integrated frame can drive the swing gear and the injection support to swing back and forth; it is beneficial to improve the contact efficiency between the desulfurizer and the flue gas, and improve the desulfurization effect of the flue gas.

[0021] The present invention also provides an operating method of a waste heat recovery type flue gas desulfurization and denitrification device, based on the above-mentioned waste heat recovery type flue gas desulfurization and denitrification device, comprising the following steps:

[0022] S1. The industrial boiler flue gas is pressurized and passed into the filter tank. The flue gas is filtered through the filter disc and then enters the heat exchange cylinder.

[0023] S2. Connect the water inlet pipe to an external water source and the water outlet pipe to an external water collection device. After the flue gas enters the heat exchange cylinder, it comes into contact with the heat exchange blades. The heat exchange blades transfer the heat in the flue gas to the water source flowing through the hollow tube, recovering the waste heat of the flue gas. At the same time, when the flue gas passes through the denitrification catalyst inside the carrier plate, the nitrogen oxides in the flue gas react with the catalyst to produce water and nitrogen. The water enters the water collection box and is discharged.

[0024] S3, the flue gas and nitrogen after denitrification enter the interior of the gas uniforming disk. Under the action of the gas uniforming disk, the flue gas enters the interior of each gas uniforming branch pipe respectively and is discharged through the gas outlet groove around the gas uniforming branch pipe. NaHCO3 desulfurizer with a particle size of 200-300 mesh is added to the desulfurizer storage tank. Under the action of the air compressor, the NaHCO3 desulfurizer is sprayed out through each nozzle and contacts with the flue gas. The sulfur oxides in the flue gas react with NaHCO3 to generate Na2SO3 and CO2. Na2SO3 is deposited at the bottom of the desulfurization box, and CO2 is discharged from the desulfurization box.

[0025] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0026] First, the device structure of the present invention is reasonably designed. Before the flue gas desulfurization and denitrification treatment, the filter disc is used to filter the flue gas for pre-treatment, which can prevent the particulate matter in the flue gas from clogging the equipment connecting pipes and adhering to the heat exchange component, denitrification component and desulfurization component, which is conducive to improving the operating stability of the equipment;

[0027] Secondly, the device of the present invention provides heat exchange blades inside the heat exchange tube, so that after the flue gas contacts the heat exchange blades, the heat in the flue gas is transferred to the water flow inside the hollow tube. This not only realizes the resource utilization of the flue gas waste heat and provides stable conditions for the desulfurization and denitrification of the flue gas, but also can prevent the damage of the equipment components caused by excessively high flue gas temperature, thereby improving the desulfurization and denitrification effect of the equipment on the flue gas.

[0028] Third, the equipment of the present invention utilizes the impact of flue gas to realize the synchronous rotation of the heat exchange fan blades and the hollow tube, which not only improves the heat exchange efficiency between the flue gas and the heat exchange fan blades, but also can drive the cleaning scraper to rotate during the rotation of the hollow tube to clean the filter plate; using the impact force of the flue gas as the power source, the energy consumption of the equipment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a longitudinal sectional view of the apparatus of the present invention;

[0030] Figure 2 is a front view of the device of the present invention;

[0031] Figure 3 is a schematic structural diagram of the filter assembly of the present invention;

[0032] Figure 4 Schematic diagram of the connection between the heat exchange coil and the heat exchange fan blades of the present invention;

[0033] Figure 5 Schematic diagram of the connection between the carrier plate and the hollow tube of the present invention;

[0034] Figure 6 It is a schematic diagram of the connection between the toggle frame and the outer chuck of the present invention;

[0035] Figure 7 This is a distribution diagram of the reversing tubes of the present invention on the gas-uniform branch pipe;

[0036] Figure 8 This is a schematic diagram of the connection between the reversing pipe and the gas uniforming branch pipe of the present invention;

[0037] Figure 9 This is a schematic diagram of the connection between the swing motor and the rack integrated frame of the present invention;

[0038] Among them, 1-base, 2-filter assembly, 20-filter tank, 200-support column, 201-inlet pipe, 21-filter plate, 22-conical collection bucket, 220-cleaning pipe, 23-rotating shaft, 230-first bevel gear, 24-cleaning scraper, 3-heat exchange assembly, 30-heat exchange cylinder, 300-support, 31-hollow pipe, 310-outlet pipe, 3100-rotating joint, 311-inlet pipe, 312-auxiliary shaft, 3120-second bevel gear, 313-blocking plate, 314-incomplete gear, 32-heat exchange fan blade, 320-blade, 33-gas collection cover, 34-heat exchange coil, 4-denitrification assembly, 40-carrying plate, 400-inner chuck, 401-outer chuck, 4010-reset spring, 402 -grid, 403-compression spring, 404-sliding frame, 4040-block, 4041-inner gear ring, 41-water collecting box, 410-drain pipe, 5-desulfurization component, 50-desulfurization box, 500-exhaust pipe, 501-partition plate, 51-gas uniform component, 510-gas uniform disk, 511-gas uniform branch pipe, 5110-air outlet groove, 512-reversing pipe, 5120-air flow dividing plate, 513-porous pipe, 52-desulfurizer injection component, 520-desulfurizer storage tank, 521-injection support, 522-riser, 523-nozzle, 524-swing gear, 53-air compressor, 54-limiting frame, 540-rack integrated frame, 541-slide rod, 55-swing motor, 550-swing disk, 551-pull rod. DETAILED DESCRIPTION

[0039] Example 1

[0040] like Figure 1The waste heat recovery type flue gas desulfurization and denitrification equipment shown includes a base 1, a filter component 2, a heat exchange component 3 and a desulfurization component 5 which are sequentially arranged on the base 1 and are interconnected; a denitrification component 4 is arranged inside the heat exchange component 3;

[0041] like Figure 1 、 2 As shown, the filter assembly 2 includes a filter tank 20 set on the base 1 through a support column 200 and a filter plate 21 set inside the filter tank 20; a conical collection hopper 22 is set at the bottom end of the filter tank 20, and a cleaning pipe 220 is set at the bottom end of the conical collection hopper 22; an air inlet pipe 201 is set on the outer wall of the filter tank 20;

[0042] like Figure 1 As shown, the heat exchange assembly 3 includes a heat exchange cylinder 30 set on the base 1 through a support 300, a hollow tube 31 clamped inside the heat exchange cylinder 30, and three heat exchange fan blades 32 equidistantly distributed on the hollow tube 31; the left end of the heat exchange cylinder 30 is provided with a water outlet pipe 310 connected to the hollow tube 31, and the right end is provided with a water inlet pipe 311 connected to the hollow tube 31; the left end of the heat exchange cylinder 30 is provided with an air collecting hood 33 sleeved on the outside of the water outlet pipe 310 and connected to the interior of the heat exchange cylinder 30; the air collecting hood 33 is connected to the top of the filter tank 20 through a conduit;

[0043] like Figure 1 、 2 As shown, the denitration assembly 4 includes three carrier plates 40 that are movably mounted on the hollow tube 31 and slidably engaged with the inner wall of the heat exchange tube 30, and a water collection box 41 that is disposed at the bottom end of the heat exchange tube 30 and is in communication with the interior of the heat exchange tube 30. Each carrier plate 40 is filled with a denitration catalyst, and each carrier plate 40 is located between two adjacent heat exchange blades 32. A drain pipe 410 is provided on the outer wall of the water collection box 41. The denitration catalyst uses V2O5 with a particle size of 30 to 50 μm.

[0044] like Figure 1 、 7As shown in Figure 9, the desulfurization assembly 5 includes a desulfurization box 50, an air-leveling component 51 and a desulfurizing agent injection component 52 arranged inside the desulfurization box 50, and an air compressor 53 arranged on the base 1 and connected to the desulfurizing agent injection component 52; an exhaust pipe 500 is provided on the side of the desulfurization box 50 away from the heat exchange tube 30; the air-leveling component 51 includes an air-leveling plate 510 arranged at the top of the desulfurization box 50 and connected to the heat exchange tube 30 through a conduit, and 25 air-leveling branches 511 equidistantly distributed on the lower bottom surface of the air-leveling plate 510 and closed at the bottom end; 6 air outlet grooves 5110 are circumferentially distributed on the side wall of each air-leveling branch 511; the desulfurizing agent injection component 52 includes an air-leveling plate 510 and a desulfurizing agent injection component 52; the air-leveling plate 510 is connected to the heat exchange tube 30 through a conduit ... It includes a desulfurizer storage tank 520 arranged at the bottom of the desulfurizer box 50 and 25 injection supports 521 equidistantly distributed on the upper end surface of the desulfurizer storage tank 520 and corresponding to the upper and lower positions of each gas distribution branch 511; each injection support 521 is provided with 6 vertical pipes 522 located at corresponding positions outside the gas distribution branch 511; each vertical pipe 522 is provided with a nozzle 523 on the side close to the gas distribution branch 511; the output end of the air compressor 53 is connected to the desulfurizer storage tank 520 through a conduction; the desulfurizer box 50 is provided with a partition plate 501 located above the desulfurizer storage tank 520 and sleeved on the outside of each injection support 521.

[0045] Example 2

[0046] This embodiment describes an operating method of a waste heat recovery flue gas desulfurization and denitrification device, based on a waste heat recovery flue gas desulfurization and denitrification device in Example 1, comprising the following steps:

[0047] S1. The industrial boiler flue gas is pressurized and passed into the filter tank 20 through the air inlet pipe 201. The flue gas is filtered by the filter disc 21 and then enters the heat exchange cylinder 30 through the gas collecting hood;

[0048] S2. Connect the water inlet pipe 311 to an external water source, and the water outlet pipe 310 to an external water source collection device. After the flue gas enters the heat exchange cylinder 30, it comes into contact with the heat exchange blades 32. The heat exchange blades 32 transfer the heat in the flue gas to the water source flowing through the hollow tube 31, thereby recovering the waste heat of the flue gas. At the same time, when the flue gas passes through the denitration catalyst inside the carrier plate 40, the nitrogen oxides in the flue gas react with the catalyst to produce water and nitrogen. The water enters the water collection box 41 and is discharged through the drain pipe 410.

[0049] S3, the flue gas and nitrogen after denitrification enter the interior of the gas uniforming disk 510, and the flue gas enters the interior of each gas uniforming branch 511 under the action of the gas uniforming disk 510, and is discharged through the circumferential gas outlet groove 5110 of the gas uniforming branch 511; NaHCO3 desulfurizer with a particle size of 200-300 mesh is added to the interior of the desulfurizer storage tank 520, and the NaHCO3 desulfurizer is sprayed out through each nozzle 523 under the action of the air compressor 53 and contacts with the flue gas. The sulfur oxides in the flue gas react with NaHCO3 to generate Na2SO3 and CO2, and Na2SO3 is deposited at the bottom of the desulfurization box 50, and CO2 is discharged from the desulfurization box 50 through the exhaust pipe 500.

[0050] Example 3

[0051] This embodiment differs from embodiment 1 in that:

[0052] like Figure 3 As shown, three filter discs 21 are provided, and each filter disc 21 is arranged side by side in the filter tank 20; the aperture of each filter disc 21 increases from top to bottom; a rotating shaft 23 is rotatably connected to the top of the filter tank 20, which passes through each filter disc 21 in sequence; a cleaning scraper 24 is sleeved on the rotating shaft 23 and is located below each filter disc 21; each cleaning scraper 24 abuts against the lower bottom surface of each filter disc 21 in a one-to-one correspondence; a first bevel gear 230 is sleeved on the bottom end of the rotating shaft 23; the aperture of each filter disc 21 is 50μm, 90μm, and 150μm from top to bottom, respectively;

[0053] like Figure 1 、 3 As shown, the hollow tube 31 is rotatably clamped inside the heat exchange cylinder 30, and the water outlet pipe 310 and the water inlet pipe 311 are respectively connected to the hollow tube 31 through a rotary joint 3100; an auxiliary shaft 312 that passes through the filter tank 20 is provided at one end of the hollow tube 31 close to the filter tank 20; a second bevel gear 3120 that is meshed with the first bevel gear 230 is sleeved on the auxiliary shaft 312.

[0054] Example 4

[0055] This embodiment describes an operating method of a waste heat recovery flue gas desulfurization and denitrification device, which is based on a waste heat recovery flue gas desulfurization and denitrification device of Example 3. The difference from Example 2 is that:

[0056] In step S1, the flue gas is filtered and processed by each filter disc 21 in turn; at the same time, the high-pressure flue gas enters the heat exchange cylinder 30 and impacts the heat exchange fan blades 32, which drive the hollow tube 31 and the auxiliary shaft 312 to rotate simultaneously, so that the rotating shaft 23 rotates under the meshing action of the first bevel gear 230 and the second bevel gear 3120, and drives each cleaning scraper 24 to rotate at the bottom of the corresponding filter disc 21, cleaning the smoke particles blocked at the bottom of the filter disc 21; the smoke particles fall into the conical collecting hopper 22 for collection, and are finally discharged through the cleaning pipe 220.

[0057] Example 5

[0058] This embodiment differs from embodiment 3 in that:

[0059] like Figure 1 、 4 As shown, a sealing plate 313 is provided inside the hollow tube 31 and at a position corresponding to each heat exchange blade 32; the heat exchange blade 32 is composed of four blades 320, and a heat exchange coil 34 is spirally provided on each blade 320, and the two ends of each heat exchange coil 34 are respectively connected to the two sides of the sealing plate 313 located at the corresponding position inside the hollow tube 31.

[0060] Example 6

[0061] This embodiment describes an operating method of a waste heat recovery flue gas desulfurization and denitrification device, which is based on a waste heat recovery flue gas desulfurization and denitrification device of Example 5. The difference from Example 4 is that:

[0062] In step S2 , after the external water source enters the hollow tube 31 , it passes through the heat exchange coil 34 on each blade 320 in sequence under the action of the blocking plate 313 .

[0063] Example 7

[0064] This embodiment differs from embodiment 5 in that:

[0065] like Figure 5 、 6As shown, the carrier plate 40 includes an inner chuck 400 sleeved on the hollow tube 31, an outer chuck 401 rotatably clamped on the inner side wall of the heat exchange cylinder 30, and two grids 402 slidably clamped between the inner chuck 400 and the outer chuck 401; the denitration catalyst is filled in the area between the inner chuck 400, the outer chuck 401 and the two grids 402; the inner chuck 400 and the outer chuck 401 are both provided with a space between the two grids 402. A compression spring 403 is provided on one side; a toggle frame 404 is provided on the inner side of the outer chuck 401, which is sleeved on the outside of the hollow tube 31 and is slidably engaged with the inner wall of the outer chuck 401 through a clamping block 4040, and a return spring 4010 is provided on the inner wall of the outer chuck 401, which abuts against the clamping block 4040; an inner ring gear 4041 is provided on the inner side of the toggle frame 404; an incomplete gear 314 is sleeved on the hollow tube 31 and meshed with the inner ring gear 4041.

[0066] Example 8

[0067] This embodiment differs from embodiment 7 in that:

[0068] like Figure 1 、 7 As shown in FIG9 , a reversing pipe 512 is provided on the outer wall of the gas-uniform branch pipe 511 and at the position corresponding to each gas outlet groove 5110; a porous pipe 513 connected to the gas-uniform disk 510 is provided inside each gas-uniform branch pipe 511; each injection support 521 is respectively rotatably connected to the desulfurization agent storage tank 520, and a limiting frame 54 located above the desulfurization agent storage tank 520 is provided inside the desulfurization box 50; each injection support 521 passes through the limiting frame 54, and each Each injection support 521 is provided with a swing gear 524; a rack integrated frame 540 is slidably engaged with each swing gear 524 on the limit frame 54, and a slide rod 541 passing through the desulfurization box 50 is provided on the rack integrated frame 540; a swing motor 55 is provided on the outer wall of the desulfurization box 50, and the output end of the swing motor 55 is connected to the swing disk 550, and the swing disk 550 and the slide rod 541 are movably hinged by a pull rod 551.

[0069] Example 9

[0070] This embodiment describes an operating method of a waste heat recovery flue gas desulfurization and denitrification device, which is based on a waste heat recovery flue gas desulfurization and denitrification device of Example 8. The difference from Example 6 is that:

[0071] In step S3, the flue gas is discharged through the reversing pipe 512 circumferentially of the gas uniforming branch pipe 511; at the same time, the swing motor 55 is used to drive the swing disk 550 to rotate. During the rotation of the swing disk 550, the pull rod 551 pushes the slide rod 541 to move back and forth on the desulfurization box 50, so that the rack integrated frame 540 can drive the swing gear 524 and the injection support 521 to swing back and forth.

[0072] Example 10

[0073] This embodiment differs from embodiment 8 in that:

[0074] like Figure 8 As shown, an air flow dividing plate 5120 is provided inside each reversing tube 512 .

[0075] Example 11

[0076] This embodiment describes an operating method of a waste heat recovery flue gas desulfurization and denitrification device. The waste heat recovery flue gas desulfurization and denitrification device is based on Example 10, and differs from Example 9 in that:

[0077] In step S3, when the flue gas is discharged through the reversing pipe 512, it is divided into multiple streams by the airflow dividing plate 5120, which can promote the diffusion range of the flue gas and increase the reaction rate of the flue gas and the desulfurizer.

[0078] It should be noted that the nozzle 523, air compressor 53 and swing motor 5 used in the present invention all adopt existing technologies and are not particularly limited here. The corresponding products can be selected according to actual needs.

Claims

1. A waste heat recovery flue gas desulfurization and denitrification equipment, characterized in that: It comprises a base (1), a filter assembly (2) arranged on the base (1) and in communication with each other, a heat exchange assembly (3) and a desulfurization assembly (5); a denitrification assembly (4) is arranged inside the heat exchange assembly (3); The filter assembly (2) comprises a filter tank (20) arranged on a base (1) and a filter disc (21) arranged inside the filter tank (20); The heat exchange assembly (3) comprises a heat exchange cylinder (30) arranged on the base (1), a hollow tube (31) clamped inside the heat exchange cylinder (30), and a heat exchange fan blade (32) arranged on the hollow tube (31); a water outlet pipe (310) and a water inlet pipe (311) are respectively provided at both ends of the heat exchange cylinder (30); The denitration component (4) comprises a carrier plate (40) sleeved on the hollow tube (31) and a water collecting box (41) arranged at the bottom end of the heat exchange cylinder (30), and the interior of the carrier plate (40) is filled with a denitration catalyst; The desulfurization assembly (5) comprises a desulfurization box (50), an air-leveling component (51) and a desulfurizer injection component (52) arranged inside the desulfurization box (50), and an air compressor (53) arranged on a base (1); the air-leveling component (51) comprises an air-leveling plate (510) arranged at the top of the desulfurization box (50) and an air-leveling branch pipe (511) arranged at the bottom surface of the air-leveling plate (510); a gas-leveling branch pipe (511) is provided on the side wall of the gas-leveling branch pipe (511). Several air outlet grooves (5110) are distributed in a circular direction; the desulfurizer injection component (52) includes a desulfurizer storage tank (520) arranged at the bottom of the desulfurizer storage tank (50) and an injection support (521) arranged on the upper end surface of the desulfurizer storage tank (520); a vertical pipe (522) is arranged on the injection support (521), and a nozzle (523) is arranged on the vertical pipe (522); the air compressor (53) is connected to the desulfurizer storage tank (520); A blocking plate (313) is provided inside the hollow tube (31) and at a position corresponding to each of the heat exchange blades (32); the heat exchange blades (32) are composed of a plurality of blades (320), and a heat exchange coil (34) is spirally provided on each of the blades (320), and both ends of each of the heat exchange coils (34) are respectively connected to both sides of the blocking plate (313) located at a corresponding position inside the hollow tube (31); The carrier disc (40) comprises an inner chuck (400) sleeved on the hollow tube (31), an outer chuck (401) rotatably clamped on the inner side wall of the heat exchange cylinder (30), and two grids (402) slidably clamped between the inner chuck (400) and the outer chuck (401); the denitration catalyst is filled in the area between the inner chuck (400), the outer chuck (401) and the two grids (402); and a compression spring (403) is provided inside each of the inner chuck (400) and the outer chuck (401) and is located on a side away from each other of the two grids (402); The outer chuck (401) is provided with a toggle frame (404) which is sleeved on the outside of the hollow tube (31) and is slidably engaged with the inner wall of the outer chuck (401) through a clamping block (4040); the inner wall of the outer chuck (401) is provided with a return spring (4010) which abuts against the clamping block (4040); the inner side of the toggle frame (404) is provided with an inner gear ring (4041); and the hollow tube (31) is provided with an incomplete gear (314) which is sleeved and meshed with the inner gear ring (4041).

2. The waste heat recovery type flue gas desulfurization and denitrification equipment according to claim 1, characterized in that: A plurality of filter discs (21) are provided, and each filter disc (21) is arranged vertically and side by side inside the filter tank (20); the aperture of each filter disc (21) increases from top to bottom; a rotating shaft (23) is rotatably connected to the top of the filter tank (20) and passes through each filter disc (21) in sequence; a cleaning scraper (24) is sleeved on the rotating shaft (23) and is located below each filter disc (21); each cleaning scraper (24) is in contact with the lower bottom surface of each filter disc (21) in a one-to-one correspondence; a first bevel gear (230) is sleeved on the bottom end of the rotating shaft (23); The hollow tube (31) is rotatably engaged with the interior of the heat exchange cylinder (30), and the water outlet pipe (310) and the water inlet pipe (311) are respectively connected to the hollow tube (31) via a rotary joint (3100); an auxiliary shaft (312) penetrating the filter tank (20) is provided at one end of the hollow tube (311) close to the filter tank (20); a second bevel gear (3120) meshingly connected to the first bevel gear (230) is sleeved on the auxiliary shaft (312).

3. The waste heat recovery flue gas desulfurization and denitrification equipment according to claim 1, characterized in that: A reversing tube (512) is provided on the outer side wall of the gas-uniform branch pipe (511) at a position corresponding to each of the gas outlet grooves (5110); Each of the injection supports (521) is rotatably engaged with the desulfurization agent storage tank (520), and a limiting frame (54) located above the desulfurization agent storage tank (520) is provided inside the desulfurization box (50); each of the injection supports (521) passes through the limiting frame (54), and each of the injection supports (521) is sleeved with a swing gear (524); a rack integrated frame (540) is slidably engaged with the limiting frame (54) and is meshed with each of the swing gears (524), and a sliding rod (541) passing through the desulfurization box (50) is provided on the rack integrated frame (540); a swing motor (55) is provided on the outer wall of the desulfurization box (50), and the output end of the swing motor (55) is connected to a swing disk (550), and the swing disk (550) and the sliding rod (541) are movably hinged through a pull rod (551).

4. The waste heat recovery flue gas desulfurization and denitrification equipment according to claim 1, characterized in that: A reversing tube (512) is provided on the outer side wall of the gas-uniform branch tube (511).

5. An operating method of a waste heat recovery type flue gas desulfurization and denitrification equipment, based on the waste heat recovery type flue gas desulfurization and denitrification equipment according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, the industrial boiler flue gas is pressurized and passed into the interior of the filter tank (20), and the flue gas is filtered through the filter disc (21) and then enters the interior of the heat exchange cylinder (30); S2, connecting the water inlet pipe (311) to an external water source, and connecting the water outlet pipe (310) to an external water source collection device; After the flue gas enters the heat exchange cylinder (30), it contacts the heat exchange blades (32). The heat exchange blades (32) transfer the heat in the flue gas to the water source flowing through the hollow tube (31), thereby recovering the waste heat of the flue gas. At the same time, when the flue gas passes through the denitration catalyst inside the carrier plate (40), the nitrogen oxides in the flue gas react with the catalyst to generate water and nitrogen. The water enters the water collecting box (41) and is discharged. S3, the flue gas after denitrification and the nitrogen enter the interior of the gas-uniform plate (510). Under the action of the gas-uniform plate (510), the flue gas enters the interior of each gas-uniform branch pipe (511) and is discharged through the gas outlet groove (5110) on the circumference of the gas-uniform branch pipe (511). A NaHCO3 desulfurizer with a particle size of 200-300 mesh is added to the interior of the desulfurizer storage tank (520). The NaHCO3 desulfurizer is sprayed through each nozzle (523) under the action of the air compressor (53) and contacts the flue gas. The sulfur oxides in the flue gas react with the NaHCO3 to generate Na2SO3 and CO2. The Na2SO3 is deposited at the bottom of the desulfurization box (50), and the CO2 is discharged from the desulfurization box (50).

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