A dust removal, desulfurization and denitrification device and method for flue gas

Abstract

The present invention relates to the technical field of flue gas purification, and discloses a dust removal, desulfurization and denitrification device and method for flue gas. Among them, a dust removal, desulfurization and denitrification device for flue gas includes a purification tower, a smoke transmission pipe and a maintenance pipe arranged outside the purification tower, a smoke exhaust pipe arranged at the top of the purification tower, a spraying device arranged inside the purification tower, and also includes a dispersion component arranged inside the purification tower. The dispersion component includes a fixed base arranged inside the purification tower and an installation frame arranged above the fixed base. In this dust removal, desulfurization and denitrification device for flue gas, by arranging the dispersion component, after the flue gas enters the purification tower and floats upward, when the flue gas contacts the upper dispersion net, part of the flue gas passes through the upper dispersion net, and part of the flue gas flows along the lower surface of the upper dispersion net and penetrates the upper dispersion net from other parts. In this way, the flue gas can be dispersed, avoiding the concentration of the flue gas in one place, which is beneficial to the full reaction of ammonia water and the flue gas, and improves the flue gas purification effect.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and particularly to a dust removal, desulfurization and denitrification device and method for flue gas. Background Art

[0002] Among numerous environmental problems, air pollution is one of the important factors affecting human health and the ecological environment. Flue gas emitted in industrial production contains a large amount of pollutants such as particulate matter, sulfur oxides and nitrogen oxides, which have caused serious damage to the atmospheric environment.

[0003] In recent years, China has continuously increased its efforts in air pollution control, introduced a series of strict environmental protection standards and regulations, and required industrial enterprises to take effective measures to reduce the content of pollutants in flue gas emissions. Against this background, dust removal, desulfurization and denitrification devices for flue gas have become essential environmental protection equipment for industrial enterprises.

[0004] A common dust removal, desulfurization and denitrification device is a desulfurization and denitrification reaction tower. During operation, flue gas is introduced from the bottom of the reaction tower, and reaction solutions such as ammonia water are sprayed in the reaction tower to react with the upward-floating flue gas to remove sulfides and nitrogen oxides in the flue gas. The sprayed water droplets can also remove dust in the flue gas.

[0005] In the patent with the publication number CN219596285U, a flue gas desulfurization, denitrification and purification dust removal device is disclosed, including a box body; a denitrator communicated with the box body; a desulfurization chamber, in which a group of conduits arranged in parallel in the vertical direction is provided, and a first spray head is installed on each conduit of the conduit group, and the first spray heads on two parallel conduit groups are arranged staggeredly. The flue gas desulfurization, denitrification and purification dust removal device provided by this utility model cleans the captured dust through the water flow sprayed by the spray heads on the wet electrostatic precipitator. The elastically arranged slide plate in the dust collection assembly collects the dust washed down by the water flow. By generating vibration through the elastically arranged slide plate, the dust moves towards the bottom surface of the slide plate to complete the collection of the dust. The denitrator communicated with the box body filters the nitrate in the flue dust, effectively filters and collects the dust and harmful gases in the flue dust, and avoids the dust and harmful gases in the flue dust being discharged into the air to pollute the air.

[0006] The existing technology has the following defects:

[0007] When purifying flue gas, reaction solutions such as ammonia water can be evenly sprayed through various atomizing nozzles, so that they are evenly scattered in the reaction tower to comprehensively cover the flue gas. However, when the flue gas is transported into the reaction tower, the flue gas will directly float upward, and the internal space of the reaction tower is wide. In this way, the flue gas may gather locally, resulting in a large amount of scattered reaction solution not participating in the reaction, causing serious waste, or the flue gas concentration in some areas is too high, and the proportion of the reaction solution in the unit space is too low, resulting in insufficient reaction of the flue gas and failing to meet the emission standards. Summary of the Invention

[0008] In view of the problem that the flue gas in the reaction tower is concentrated and cannot react fully with the reaction solution in the prior art, a dust removal, desulfurization and denitrification device and method for flue gas are proposed.

[0009] The present application provides a dust removal, desulfurization and denitrification device and method for flue gas, and its purpose is to disperse the flue gas so that it can contact the reaction solution more fully.

[0010] The technical solution of the present invention is: a dust removal, desulfurization and denitrification device for flue gas, including a purification tower, a flue gas transmission pipe and a maintenance pipe arranged outside the purification tower, a smoke exhaust pipe arranged at the top of the purification tower, a spraying device arranged inside the purification tower, and further including a dispersion component arranged inside the purification tower. The dispersion component includes a fixed base arranged inside the purification tower, an installation frame arranged above the fixed base, and an upper dispersion net arranged inside the installation frame;

[0011] The dispersion component is located above the flue gas transmission pipe, the spraying device is located above the installation frame, the fixed base and the installation frame are annular, the center of the upper dispersion net protrudes upward, and its overall shape is frustum-shaped.

[0012] Further, the purification tower sequentially includes a tower base, a first purification area, a second purification area, and a top platform from bottom to top. The flue gas transmission pipe is connected to the tower base, the smoke exhaust pipe is connected to the top platform, and a maintenance pipe, a spraying device, and a dispersion component are arranged outside both the first purification area and the second purification area. The spraying device and the dispersion component are distributed on the upper and lower sides of the maintenance pipe.

[0013] Further, the dispersion component further includes a connecting column outside the upper dispersion net, a lower dispersion net and a limit seat arranged outside the connecting column;

[0014] The connecting column penetrates from above the upper dispersion net to below, the center of the lower dispersion net protrudes downward, and its overall shape is frustum-shaped. The lower dispersion net and the upper dispersion net are concentrically arranged, and the limit seat supports below the lower dispersion net.

[0015] Further, the dispersion component further includes a convex platform arranged outside the connecting column;

[0016] The convex platform is frustum-shaped and is placed on the upper surface of the lower dispersion net, and the two are concentrically arranged.

[0017] Furthermore, both the upper dispersion net and the connecting column are woven by warp and weft threads, and a detachable guiding column is provided at the intersection of the warp and weft threads, and the guiding column is perpendicular to the horizontal plane.

[0018] Furthermore, a vibration assembly is also provided in the purification tower. The vibration assembly includes an upper elastic gasket and a lower elastic gasket respectively arranged on the upper and lower sides of the installation frame, a placement box arranged on the inner wall of the purification tower, a vibration device arranged inside the placement box, and a notch arranged on the surface of the upper elastic gasket;

[0019] The upper elastic gasket is located between the installation frame and the placement box, the lower elastic gasket is located between the fixed base and the installation frame, the power output end of the vibration device passes through the placement box and the notch and fits on the surface of the installation frame, and the vibration devices are distributed in an annular array around the installation frame.

[0020] Furthermore, the vibration assembly also includes a limiting ring arranged at the bottom of the placement box and the top of the fixed base.

[0021] Furthermore, the vibration assembly also includes a sliding opening formed at the bottom of the placement box, a driving rod arranged inside the placement box, and a fixed clamping block arranged above the fixed base;

[0022] Both the upper elastic gasket and the lower elastic gasket are L-shaped, and the upper elastic gasket and the lower elastic gasket are symmetrically arranged based on the installation frame. The driving rod passes through the sliding opening and is connected to the fixed clamping block. The fixed clamping block is "n"-shaped, and both ends of the fixed clamping block extend towards the upper elastic gasket and the lower elastic gasket respectively and fit with them.

[0023] Furthermore, the present invention also provides a method for dust removal, desulfurization and denitration of flue gas, which is used in a device for dust removal, desulfurization and denitration of flue gas, and includes the following steps:

[0024] Step 1: Preparation work, check the integrity of the spray reaction tower and prepare sufficient ammonia water to be replenished into the storage tank;

[0025] Step 2: Flue gas guidance, guide the industrial flue gas to enter the tower from the smoke inlet at the bottom of the spray reaction tower, and ensure that the speed and flow rate of the flue gas entering are stable. During the upward flow of the flue gas, it is evenly dispersed by the dispersion assembly;

[0026] Step 3: Spray purification, after the flue gas enters, the upper and lower layers of spray devices evenly spray out the ammonia water, sprinkle the ammonia water into the flue gas, and remove sulfides, nitrogen oxides and dust in the flue gas;

[0027] The ammonia water reacts with sulfur dioxide in the flue gas to generate ammonium sulfite;

[0028] Ammonia water also undergoes a reduction reaction with nitrogen oxides in the flue gas, converting the nitrogen oxides into nitrogen and water;

[0029] The dust particles in the flue gas combine with the water molecules in the ammonia water, and the wetted dust particles become heavier and fall;

[0030] Step 4: When a large amount of solidified matter adheres to the surface of the dispersion component, start the vibration component, and make the solidified matter fall off through vibration;

[0031] Step 5: The treated flue gas is discharged from the top of the spray reaction tower, and the discharged flue gas is sampled and inspected. After passing the inspection, it is discharged into the atmosphere.

[0032] The beneficial effects of the present invention:

[0033] 1. By setting the dispersion component, after the flue gas enters the purification tower and floats upward, when the flue gas contacts the upper dispersion net, part of the flue gas passes through the upper dispersion net. If the flue gas is relatively concentrated and the flow rate per unit time of the upper dispersion net is limited, part of the flue gas passes through the upper dispersion net, and part of the flue gas flows along the lower surface of the upper dispersion net and penetrates the upper dispersion net from other parts. In this way, the flue gas can be dispersed, avoiding the flue gas from gathering in one place, which is beneficial to the full reaction of ammonia water and flue gas and improves the flue gas purification effect.

[0034] 2. By installing a lower dispersion net below the upper dispersion net, after the flue gas enters the purification tower and floats upward, when the flue gas contacts the lower dispersion net, part of the flue gas passes through the lower dispersion net, and part diffuses outward along the lower dispersion net floor and then contacts the upper dispersion net. Part of it passes through the upper dispersion net, and part flows toward the center. In this way, the flue gas and the upper dispersion net can be fully contacted, maximizing the dispersion effect of the upper dispersion net.

[0035] 3. The upper dispersion net and the connecting columns are both woven by warp and weft, and a removable guiding column is provided at the intersection of the warp and weft. The guiding column is perpendicular to the horizontal plane. After the flue gas penetrates the upper dispersion net and the lower dispersion net, the guiding column still plays a role in separating the flue gas, extending the dispersion channel of the flue gas without increasing the thickness of the upper dispersion net and the lower dispersion net, avoiding the dispersion channel from being too short and the flue gas re-aggregating before being fully dispersed, enhancing the dispersion effect of the dispersion component on the flue gas, and at the same time reducing the cleaning difficulty of the dispersion channel.

[0036] 4. By setting the vibration component, when a large amount of solidified matter adheres to the surface of the dispersion component, the vibration device is started, and the dispersion component as a whole is continuously vibrated through the installation frame. Then, combined with the spraying and scouring of ammonia water and flue gas, the solidified matter adhering to the surface of the dispersion component falls off, thus playing an automatic cleaning role, extending the cycle required for the pores on the upper dispersion net and the lower dispersion net to be blocked, and reducing the equipment maintenance cost.

[0037] 5. By setting the fixed clamping block, before cleaning, the fixed clamping block is clamped outside the installation frame, the upper elastic gasket and the lower elastic gasket to fix them, so that the dispersion component can still maintain a certain stability under the impact of the flue gas. After the vibration cleaning of the dispersion component is completed, the fixed clamping block moves away from the installation frame, and a buffer space appears outside the upper elastic gasket and the lower elastic gasket, which can have a better vibration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a perspective view of the dust removal, desulfurization and denitration device for flue gas of the present invention;

[0039] Figure 2 is a schematic diagram of the inside of a purification area of the present invention;

[0040] Figure 3 is an exploded view of the dispersion component of the present invention;

[0041] Figure 4 is a front view cross-sectional view of the present invention;

[0042] Figure 5 For the present invention Figure 4 is an enlarged view of the dispersion component in;

[0043] Figure 6 For the present invention Figure 5 is an enlarged view of part A in;

[0044] Figure 7 is a schematic diagram of the vibration device of the present invention;

[0045] Figure 8 is an exploded view of the placement box of the present invention;

[0046] Figure 9 is a schematic diagram of the upper dispersion net of the present invention;

[0047] Figure 10 is a schematic diagram of the placement box of the present invention;

[0048] Figure 11 For the present invention Figure 8 is an enlarged view of part B in;

[0049] Figure 12 For the present invention Figure 9 is an enlarged view of part C in;

[0050] Figure 13 For the present invention Figure 10 is an enlarged view of part D in.

[0051] In the figure:

[0052] 1. Purification tower; 11. Tower base; 12. First-stage purification area; 13. Second-stage purification area; 14. Top platform; 2. Smoke transmission pipe; 3. Smoke exhaust pipe; 4. Maintenance pipe; 5. Spraying equipment; 6. Dispersion assembly; 61. Fixed base; 62. Installation frame; 63. Upper dispersion net; 64. Connecting column; 65. Lower dispersion net; 66. Limit seat; 67. Boss; 7. Vibration assembly; 71. Upper elastic gasket; 72. Lower elastic gasket; 73. Placement box; 731. Cover plate; 74. Vibration equipment; 75. Notch; 76. Limit ring; 77. Sliding opening; 78. Driving rod; 79. Fixed clamping block. Specific embodiments

[0053] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0054] Example 1, referring to Figures 1-6 , which is the first embodiment of the present invention, provides a dust removal, desulfurization, and denitrification device for flue gas, including a purification tower 1, a smoke transmission pipe 2 and a maintenance pipe 4 arranged outside the purification tower 1, a smoke exhaust pipe 3 arranged on the top of the purification tower 1, a spraying equipment 5 arranged inside the purification tower 1, and a dispersion assembly 6 arranged inside the purification tower 1. The dispersion assembly 6 includes a fixed base 61 arranged inside the purification tower 1, an installation frame 62 arranged above the fixed base 61, and an upper dispersion net 63 arranged inside the installation frame 62.

[0055] The purification tower 1 successively includes a tower base 11, a first-stage purification area 12, a second-stage purification area 13, and a top platform 14 from bottom to top. The smoke transmission pipe 2 is connected to the tower base 11, the smoke exhaust pipe 3 is connected to the top platform 14, and maintenance pipes 4, spraying equipment 5, and dispersion assemblies 6 are arranged on the outer sides of both the first-stage purification area 12 and the second-stage purification area 13. The spraying equipment 5 and the dispersion assemblies 6 are distributed on the upper and lower sides of the maintenance pipe 4.

[0056] Specifically, one end of the smoke transmission pipe 2 extends into the tower base 11 and the two are welded. The other end of the smoke transmission pipe 2 is connected to a flue gas conveying device. The smoke exhaust pipe 3 is fixed to the top of the top platform 14 by bolts. The maintenance pipe 4 is welded to the first-stage purification area 12 and the second-stage purification area 13. Both the upper and lower layers of spraying equipment 5 extend to the outside of the purification tower 1, and the extended ends are connected through a conveying pipe. The other end of the conveying pipe is connected into a storage tank filled with ammonia water. The dispersion assembly 6 is located above the smoke transmission pipe 2, the spraying equipment 5 is located above the installation frame 62. The fixed base 61 and the installation frame 62 are annular, the fixed base 61 is fixedly connected to the inside of the purification tower 1, and the center of the upper dispersion net 63 protrudes upward, and the whole is in a frustum shape.

[0057] By setting the dispersion component 6, after the flue gas enters the purification tower 1 and floats upward, when the flue gas contacts the upper dispersion mesh 63, part of the flue gas passes through the upper dispersion mesh 63. If the flue gas is relatively concentrated and the flow rate per unit time of the upper dispersion mesh 63 is limited, part of the flue gas passes through the upper dispersion mesh 63, and part of the flue gas flows along the lower surface of the upper dispersion mesh 63 and penetrates the upper dispersion mesh 63 from other parts. In this way, the flue gas can be dispersed, avoiding the concentration of the flue gas in one place, which is conducive to the full reaction of ammonia water and flue gas and improves the flue gas purification effect.

[0058] The dispersion component 6 further includes a connecting column 64 outside the upper dispersion mesh 63, a lower dispersion mesh 65 and a limit seat 66 arranged outside the connecting column 64, and a boss 67 arranged outside the connecting column 64.

[0059] Specifically, the connecting column 64 penetrates from above the upper dispersion mesh 63 to below. The center of the lower dispersion mesh 65 bulges downward, and its overall shape is frustum-shaped. The lower dispersion mesh 65 and the upper dispersion mesh 63 are concentrically arranged. The limit seat 66 supports below the lower dispersion mesh 65, and the limit seat 66 is threadedly connected to the connecting column 64; the boss 67 is frustum-shaped, the boss 67 is placed on the upper surface of the lower dispersion mesh 65, and the two are concentrically arranged. The boss 67 is threadedly connected to the connecting column 64. The boss 67 can prevent the solidified matter generated in the purification tower 1 from accumulating inside the lower dispersion mesh 65.

[0060] By installing the lower dispersion mesh 65 below the upper dispersion mesh 63, after the flue gas enters the purification tower 1 and floats upward, when the flue gas contacts the lower dispersion mesh 65, part of the flue gas passes through the lower dispersion mesh 65, and part diffuses outward along the ground of the lower dispersion mesh 65 and then contacts the upper dispersion mesh 63. Part of it passes through the upper dispersion mesh 63, and part flows toward the center. In this way, the flue gas and the upper dispersion mesh 63 can be fully contacted, maximizing the dispersion effect of the upper dispersion mesh 63.

[0061] Specifically, both the upper dispersion mesh 63 and the connecting column 64 are woven by warp and weft, and a detachable guiding column is arranged at the intersection of the warp and weft. The guiding column is perpendicular to the horizontal plane. After the flue gas penetrates the upper dispersion mesh 63 and the lower dispersion mesh 65, the guiding column still plays a role in separating the flue gas, extending the dispersion channel of the flue gas without increasing the thickness of the upper dispersion mesh 63 and the lower dispersion mesh 65, avoiding the dispersion channel being too short and the flue gas re-aggregating before being fully dispersed, enhancing the dispersion effect of the dispersion component 6 on the flue gas, and at the same time reducing the cleaning difficulty of the dispersion channel.

[0062] Example 2, refer to Figures 1-13, which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a vibration assembly 7 is further provided in the purification tower 1. The vibration assembly 7 includes an upper elastic gasket 71 and a lower elastic gasket 72 respectively arranged on the upper and lower sides of the installation frame 62, a placement box 73 arranged on the inner wall of the purification tower 1, a vibration device 74 arranged inside the placement box 73, and a notch 75 arranged on the surface of the upper elastic gasket 71; the vibration assembly 7 further includes a limit ring 76 arranged at the bottom of the placement box 73 and the top of the fixed base 61.

[0063] Specifically, the upper elastic gasket 71 and the lower elastic gasket 72 are respectively attached to the upper and lower surfaces of the installation frame 62. The main bodies of the upper elastic gasket 71 and the lower elastic gasket 72 are both annular. The upper elastic gasket 71 is located between the installation frame 62 and the placement box 73, and the lower elastic gasket 72 is located between the fixed base 61 and the installation frame 62. The placement box 73 is fixed to the purification tower 1 by bolts. A cover plate 731 is installed on the top of the placement box 73. The power output end of the vibration device 74 passes through the placement box 73 and the notch 75 and fits on the surface of the installation frame 62. The vibration devices 74 are distributed in an annular array around the installation frame 62. The vibration devices 74 are fixed in the placement box 73 by bolts. Both the upper elastic gasket 71 and the lower elastic gasket 72 are attached to the limit ring 76. The limit ring 76 plays a role in limiting the upper elastic gasket 71 and the lower elastic gasket 72 to prevent offset and dislocation during vibration. A monitoring sensor is arranged in the purification tower 1.

[0064] By setting the vibration assembly 7, when a large amount of solidified substances adhere to the surface of the dispersion assembly 6, the vibration device 74 is started, and the dispersion assembly 6 as a whole is continuously vibrated through the installation frame 62. Then, combined with the spraying and scouring of ammonia water and flue gas, the solidified substances adhering to the surface of the dispersion assembly 6 fall off, thus playing an automatic cleaning role, extending the cycle required for the pores on the upper dispersion net 63 and the lower dispersion net 65 to be blocked, and reducing the equipment maintenance cost.

[0065] The vibration assembly 7 further includes a sliding opening 77 opened at the bottom of the placement box 73, a driving rod 78 arranged inside the placement box 73, and a fixed clamping block 79 arranged above the fixed base 61.

[0066] Specifically, both the upper elastic gasket 71 and the lower elastic gasket 72 are L-shaped, and the upper elastic gasket 71 and the lower elastic gasket 72 are symmetrically arranged based on the installation frame 62. The driving rod 78 passes through the sliding opening 77 and is fixedly connected to the fixed clamping block 79. The driving rod 78 is connected to a driving device. The driving device is fixed in the placement box 73 by bolts. The driving rod 78 is also connected inside the sliding opening 77. The fixed clamping block 79 is "n"-shaped. The two ends of the fixed clamping block 79 extend towards the upper elastic gasket 71 and the lower elastic gasket 72 respectively and are attached to them. The fixed clamping blocks 79 are distributed in an annular array around the installation frame 62.

[0067] By setting the fixed clamping block 79, before cleaning, the fixed clamping block 79 is clamped outside the installation frame 62, the upper elastic gasket 71 and the lower elastic gasket 72 to fix them, so that the dispersion component 6 can still maintain a certain stability under the impact of the flue gas. After the vibration cleaning of the dispersion component 6 is completed, the fixed clamping block 79 moves away from the installation frame 62, and a buffer space appears outside the upper elastic gasket 71 and the lower elastic gasket 72, which can have a better vibration effect.

[0068] Example 3, refer to Figures 1-13 , which is the fourth embodiment of the present invention, provides: a method for dust removal, desulfurization and denitrification of flue gas, which is used in a dust removal, desulfurization and denitrification device for flue gas, and includes the following steps:

[0069] Step 1: Preparation work, check the integrity of the spray reaction tower and prepare sufficient ammonia water to be replenished into the storage tank;

[0070] Step 2: Flue gas guidance, guide the industrial flue gas to enter the tower from the smoke inlet at the bottom of the spray reaction tower, and ensure that the speed and flow rate of the flue gas entering are stable. During the upward flow of the flue gas, it is evenly dispersed by the dispersion component 6;

[0071] Step 3: Spray purification, after the flue gas enters, the upper and lower layers of spray devices 5 evenly spray out the ammonia water, sprinkle the ammonia water into the flue gas to remove sulfides, nitrogen oxides and dust in the flue gas;

[0072] Ammonia water reacts with sulfur dioxide in the flue gas to form ammonium sulfite;

[0073] Ammonia water also undergoes a reduction reaction with nitrogen oxides in the flue gas to convert nitrogen oxides into nitrogen and water;

[0074] The dust particles in the flue gas combine with the water molecules in the ammonia water, and the wet dust particles become heavier and fall;

[0075] Step 4: When a large amount of solidified substances adhere to the surface of the dispersion component 6, start the vibration component 7 to make the solidified substances fall off through vibration;

[0076] Step 5: The treated flue gas is discharged from the top of the spray reaction tower, and the discharged flue gas is sampled and inspected. After passing the inspection, it is discharged into the atmosphere.

[0077] Combining Examples 1-2, the working principle of a dust removal, desulfurization and denitrification device for flue gas of the present invention is as follows:

[0078] During installation, insert the connecting column 64 vertically downward through the upper dispersion mesh 63. Then, slip the boss 67 onto the connecting column 64 and fix it in place with threads. Next, slip the lower dispersion mesh 65 and the limit seat 66 onto the outside of the connecting column 64 in sequence. The limit seat 66 is fixed to the connecting column 64 with threads. The limit seat 66 and the boss 67 together clamp and fix the lower dispersion mesh 65, thus completing the installation of the dispersion assembly 6.

[0079] Attach the upper elastic gasket 71 and the lower elastic gasket 72 to the upper and lower sides of the installation frame 62 respectively. Then, clip the fixing block 79 onto the upper and lower sides of the upper elastic gasket 71 and the placement box 73. Install all the upper elastic gaskets 71, lower elastic gaskets 72, and fixing blocks 79 in this way. Then, place the dispersion assembly 6 into the purification tower 1. The installation frame 62, upper elastic gasket 71, lower elastic gasket 72, and fixing block 79 are all lapped above the fixed base 61. The lower elastic gasket 72 is slipped over the outside of the limit ring 76. Insert the placement box 73 into the purification tower 1 so that the drive rod 78 is inserted into the sliding opening 77 and the vibration device 74 is inserted into the notch 75. Finally, fix the placement box 73 with bolts.

[0080] Assemble the tower base 11, the first purification zone 12, the second purification zone 13, and the top platform 14 in sequence from bottom to top.

[0081] During use, first turn on the spraying device 5. The spraying device 5 evenly sprays out ammonia water, which spills downward in the purification tower 1. Then, the smoke pipe 2 sends the flue gas into the tower base 11. Subsequently, the flue gas floats upward. When the flue gas contacts the lower dispersion mesh 65, part of the flue gas directly penetrates the lower dispersion mesh 65 and flows upward. Since the flow rate of the upper dispersion mesh 63 per unit time is limited, the flue gas that fails to penetrate the lower dispersion mesh 65 diffuses outward along the bottom contour of the lower dispersion mesh 65. Subsequently, the flue gas flows below the upper dispersion mesh 63. Part of the flue gas penetrates the upper dispersion mesh 63 and floats upward, and part of the flue gas flows toward the center along the bottom contour of the upper dispersion mesh 63 at the bottom, enabling the flue gas to evenly penetrate through various parts of the upper dispersion mesh 63. The flue gas reacts with the ammonia water and is purified.

[0082] After the equipment has been working for a period of time, a large amount of solidified matter (the solidified matter includes the products of flue gas reaction and dust in the flue gas) will be generated in the purification tower 1. These solidified matter may adhere to the surface of the dispersion component 6. When the sensor detects that the upper dispersion net 63 and the connecting column 64 are blocked, the vibration component 7 is started, and the driving device drives the fixed block 79 to move away from the installation frame 62 through the driving rod 78, so that a large number of vacant areas appear between the upper elastic gasket 71 and the placement box 73, and between the lower elastic gasket 72 and the fixed base 61, and the supporting effect obtained by the upper elastic gasket 71 and the lower elastic gasket 72 is weakened. Then the vibration device 74 is started, and the vibration The moving device 74 drives the installation frame 62 to vibrate, and the installation frame 62 transmits the vibration to all the dispersion components 6, the upper dispersion net 63 and the lower dispersion net 65 vibrate, and then with the flushing of ammonia water and flue gas, the attachments on their surfaces fall off; after cleaning, the vibration device 74 stops vibrating, and the driving device drives the fixed block 79 to approach the installation frame 62 through the driving rod 78, and the two ends of the fixed block 79 are inserted into the vacant area between the upper elastic gasket 71 and the placement box 73, and between the lower elastic gasket 72 and the fixed base 61, so that the upper elastic gasket 71 and the lower elastic gasket 72 obtain sufficient support, the state becomes stable, and the fixing effect on the installation frame 62 is also more stable.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dust removal, desulfurization and denitrification device for flue gas, comprising a purification tower (1), a smoke transmission pipe (2) and a maintenance pipe (4) arranged outside the purification tower (1), a smoke exhaust pipe (3) arranged at the top of the purification tower (1), and a spraying device (5) arranged inside the purification tower (1), characterized in that: It further includes a dispersion component (6) arranged inside the purification tower (1). The dispersion component (6) includes a fixed base (61) arranged inside the purification tower (1), a mounting frame (62) arranged above the fixed base (61), and an upper dispersion net (63) arranged inside the mounting frame (62). The dispersion component (6) is located above the smoke transmission pipe (2), the spraying device (5) is located above the mounting frame (62), the fixed base (61) and the mounting frame (62) are annular, the center of the upper dispersion net (63) protrudes upward, and its overall shape is frustum-shaped. A vibration component (7) is also arranged inside the purification tower (1). The vibration component (7) includes an upper elastic gasket (71) and a lower elastic gasket (72) respectively arranged on the upper and lower sides of the mounting frame (62), a placement box (73) arranged on the inner wall of the purification tower (1), a vibration device (74) arranged inside the placement box (73), and a notch (75) arranged on the surface of the upper elastic gasket (71). The vibration component (7) further includes a sliding opening (77) opened at the bottom of the placement box (73), a driving rod (78) arranged inside the placement box (73), and a fixed clamping block (79) arranged above the fixed base (61). Both the upper elastic gasket (71) and the lower elastic gasket (72) are L-shaped, and the upper elastic gasket (71) and the lower elastic gasket (72) are symmetrically arranged based on the mounting frame (62). The driving rod (78) passes through the sliding opening (77) and is connected to the fixed clamping block (79). The fixed clamping block (79) is "n"-shaped, and both ends of the fixed clamping block (79) extend towards the upper elastic gasket (71) and the lower elastic gasket (72) respectively and are in contact with them.

2. The dust removal, desulfurization and denitrification device for flue gas according to claim 1, wherein: The purification tower (1) sequentially includes a tower base (11), a first-stage purification area (12), a second-stage purification area (13), and a top platform (14) from bottom to top. The smoke transmission pipe (2) is connected to the tower base (11), the smoke exhaust pipe (3) is connected to the top platform (14), and a maintenance pipe (4), a spraying device (5), and a dispersion component (6) are arranged on the outer sides of both the first-stage purification area (12) and the second-stage purification area (13). The spraying device (5) and the dispersion component (6) are distributed on the upper and lower sides of the maintenance pipe (4).

3. The dust removal, desulfurization and denitrification device for flue gas according to claim 2, characterized in that: The dispersion component (6) further includes a connecting column (64) outside the upper dispersion net (63), a lower dispersion net (65) and a limit seat (66) arranged outside the connecting column (64). The connecting column (64) penetrates from above the upper dispersion net (63) to below. The center of the lower dispersion net (65) protrudes downward, and its overall shape is frustum-shaped. The lower dispersion net (65) and the upper dispersion net (63) are concentrically arranged, and the limit seat (66) supports below the lower dispersion net (65).

4. The dust removal, desulfurization and denitrification device for flue gas according to claim 3, characterized in that: The dispersion component (6) further includes a convex platform (67) arranged outside the connecting column (64). The convex platform (67) is frustum-shaped, the convex platform (67) is placed on the upper surface of the lower dispersion net (65), and the two are concentrically arranged.

5. The dust removal, desulfurization and denitrification device for flue gas according to claim 4, characterized in that: Both the upper dispersion net (63) and the connecting column (64) are woven by warp and weft, and a removable guiding column is arranged at the intersection of the warp and weft, and the guiding column is perpendicular to the horizontal plane.

6. The dust removal, desulfurization and denitration device for flue gas according to claim 5, characterized in that: The upper elastic gasket (71) is located between the installation frame (62) and the placement box (73), the lower elastic gasket (72) is located between the fixed base (61) and the installation frame (62), and the power output end of the vibration device (74) penetrates through the placement box (73) and the notch (75) and fits on the surface of the installation frame (62). The vibration devices (74) are distributed in an annular array around the installation frame (62).

7. The dust removal, desulfurization and denitrification device for flue gas according to claim 6, characterized in that: The vibration assembly (7) further includes a limit ring (76) provided at the bottom of the placement box (73) and the top of the fixed base (61).

8. A method for dedusting, desulfurizing and denitrifying flue gas, which uses the device for dedusting, desulfurizing and denitrifying flue gas as described in claim 7, is characterized in that, It includes the following steps: Step 1: Preparation work, check the integrity of the equipment and prepare sufficient ammonia water; Step 2: Flue gas guidance, guide the industrial flue gas to enter the tower from the flue gas inlet at the bottom of the equipment, and ensure that the speed and flow rate of the flue gas entering are stable. During the upward flow of the flue gas, it is evenly dispersed by the dispersion assembly (6); Step 3: Spray purification, after the flue gas enters, the upper and lower layers of spray devices (5) evenly spray out the ammonia water and sprinkle the ammonia water into the flue gas to remove sulfides, nitrogen oxides and dust in the flue gas; Step 4: When a large amount of solidified substances adhere to the surface of the dispersion assembly (6), start the vibration assembly (7) to make the solidified substances fall off through vibration; Step 5: The treated flue gas is discharged from the top of the equipment, and the discharged flue gas is sampled and inspected. After passing the inspection, it is discharged into the atmosphere.

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