A boiler flue gas dust removal and desulfurization equipment

Abstract

This utility model discloses a boiler flue gas dust removal and desulfurization device, belonging to the field of flue gas purification technology. It includes a desulfurization and dust removal tower, a mounting base hood movably installed at the bottom of the tower, a desulfurization module located inside the tower, and a dust removal module mounted on the mounting base hood. The tower has an exhaust port at its upper end. The dust removal module on the mounting base hood performs graded filtration and removal, significantly improving the overall dust removal effect. The boiler flue gas after dust removal forms a counter-current with the downward-falling absorbent liquid, greatly increasing the contact area and contact time between the absorbent liquid and the flue gas, thus significantly improving the desulfurization effect. The desulfurization and dust removal tower and the mounting base hood are movably connected, with sealing components to ensure no leakage of flue gas and residual liquid, and to facilitate quick separation for replacing the suction strip or cleaning the dust removal screen, improving maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification technology, specifically to a boiler flue gas dust removal and desulfurization equipment. Background Technology

[0002] With the development of industry, boilers are widely used as important thermal energy equipment. However, the combustion process of boilers produces a large amount of flue gas, which contains pollutants such as dust and sulfur dioxide. If these pollutants are directly emitted into the atmosphere, they will cause serious environmental pollution, not only forming acid rain, corroding buildings and damaging vegetation, but also endangering human health and affecting the ecological balance. Therefore, it is crucial to treat boiler flue gas for dust removal and desulfurization. Thus, there is an urgent need for a boiler flue gas dust removal and desulfurization equipment.

[0003] However, the existing boiler flue gas dust removal and desulfurization equipment has a component connection method that is not conducive to maintenance. Replacing components or cleaning internal dirt may require a long period of downtime, which affects production efficiency. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a boiler flue gas dust removal and desulfurization device.

[0005] The technical solution of this utility model is: a boiler flue gas dust removal and desulfurization equipment, including a desulfurization and dust removal tower, an installation bottom cover movably installed at the bottom of the desulfurization and dust removal tower, a desulfurization module disposed inside the desulfurization and dust removal tower, a dust removal module disposed on the installation bottom cover, and an exhaust port provided at the upper end of the desulfurization and dust removal tower;

[0006] The dust removal module includes an inlet located at the bottom of the mounting base, an annular mounting plate located inside the mounting base, a dust removal mesh plate located at the center of the annular mounting plate, and an upper cover connected to the annular mounting plate via an annular mounting cylinder. An air outlet is provided at the center of the upper end of the upper cover, and an arc-shaped cover is connected to the air outlet via a connecting rod.

[0007] Furthermore, the desulfurization module includes a liquid distribution rack located at the top of the desulfurization and dust removal tower and having several spray holes at the bottom, and a container connected to the liquid distribution rack and having a liquid pump at the connection point.

[0008] Explanation: When the flue gas after dust removal flows out of the outlet, the absorbent liquid in the container is drawn into the distribution rack by the liquid pump and evenly sprayed through various spray holes. At this time, the downward falling absorbent liquid and the upward flowing flue gas form a counter-current, which can greatly increase the contact area and contact time between the absorbent liquid and the flue gas, allowing the absorbent liquid to react more fully with the sulfides in the flue gas, thereby significantly improving the desulfurization effect.

[0009] Furthermore, the upper cover is an arc-shaped structure with a raised upper end and a downward sloping edge, and several guide grooves are distributed in a radiating pattern on the upper cover.

[0010] Explanation: After the flue gas flows out from the outlet at the center of the upper cover, it flows in the opposite direction to the downward-falling absorbent liquid and undergoes desulfurization treatment. The treated residual liquid is quickly guided to the annular mounting plate along a fixed path through various guide grooves on the upper cover, preventing the residual liquid from flowing, accumulating or dripping randomly on the surface of the upper cover.

[0011] Furthermore, the outer diameter of the upper cover is smaller than the outer diameter of the annular mounting plate, and an absorbent strip is placed on the upper end of the annular mounting plate.

[0012] Note: When the residual liquid after desulfurization flows through the guide grooves on the upper cover to the annular mounting plate, it will fall onto the absorbent strip. When the absorbent strip is saturated or reaches a certain service life, you only need to replace it with a new absorbent strip. There is no need to perform complicated cleaning or wiping on the annular mounting plate.

[0013] Furthermore, there are multiple dust removal screens. The dust removal screen at the bottom is movably installed at the center of the annular mounting plate, and the remaining dust removal screens are movably installed on the inner wall of the annular mounting cylinder from top to bottom. The mesh count of each dust removal screen distributed from bottom to top increases sequentially.

[0014] Explanation: When flue gas enters through the inlet, it flows from bottom to top through various dust removal screens with gradually increasing mesh sizes, thereby classifying and filtering dust of various particle sizes in the flue gas. Compared with dust removal screens with a single mesh size, it can more comprehensively cover the complex distribution of dust particles in the flue gas, greatly improving the overall dust removal effect.

[0015] The beneficial effects of this utility model are:

[0016] In operation, the boiler flue gas dust removal and desulfurization equipment of this utility model allows boiler flue gas to enter through the bottom of the mounting hood. The flue gas is then filtered and removed in stages by the dust removal module installed on the hood, which comprehensively covers the complex dust particle distribution in the flue gas, significantly improving the overall dust removal effect. After dust removal, the boiler flue gas forms a counter-current with the downward-falling absorbent liquid, greatly increasing the contact area and contact time between the absorbent liquid and the flue gas. This allows the absorbent liquid to react more fully with the sulfides in the flue gas, thus significantly improving the desulfurization effect. After desulfurization, the flue gas is discharged through the outlet. The desulfurization and dust removal tower and the mounting hood are connected movably, with sealing components to ensure no leakage of flue gas and residual liquid, and to facilitate quick separation for replacing the suction strips or cleaning the dust removal screen, improving maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the distribution structure of the guide groove on the upper cover of this utility model.

[0019] Among them, 1-desulfurization and dust removal tower, 10-emission port, 2-installation base cover, 3-desulfurization module, 30-spray hole, 31-liquid distribution rack, 32-containment box, 320-liquid pump, 4-dust removal module, 40-inlet, 41-ring mounting plate, 42-dust removal mesh plate, 43-upper cover, 430-ring mounting cylinder, 431-air outlet, 432-connecting support rod, 433-arc cover, 434-guide groove. Detailed Implementation

[0020] Example 1: As Figure 1 , 2 As shown, a boiler flue gas dust removal and desulfurization device includes a desulfurization and dust removal tower 1, an installation base cover 2 movably installed at the bottom of the desulfurization and dust removal tower 1, a desulfurization module 3 disposed inside the desulfurization and dust removal tower 1, and a dust removal module 4 disposed on the installation base cover 2. The upper end of the desulfurization and dust removal tower 1 is provided with an exhaust port 10. When the bottom end of the desulfurization and dust removal tower 1 is connected to the installation base cover 2, it is sealed by an existing sealing component to prevent leakage. The sealing component can be one of fluororubber, nitrile rubber or polytetrafluoroethylene.

[0021] The dust removal module 4 includes an inlet 40 at the bottom of the mounting base 2, an annular mounting plate 41 inside the mounting base 2, a dust removal mesh plate 42 at the center of the annular mounting plate 41, and an upper cover 43 connected to the annular mounting plate 41 via an annular mounting cylinder 430. An air outlet 431 is provided at the center of the upper end of the upper cover 43, and an arc-shaped cover 433 is connected to the air outlet 431 via a connecting support rod 432.

[0022] The desulfurization module 3 includes a liquid distribution rack 31 located at the top of the desulfurization and dust removal tower 1 and having 21 spray holes 30 at the bottom, and a container 32 connected to the liquid distribution rack 31 and having a liquid pump 320 at the connection point. When the flue gas treated by dust removal flows out through the outlet 431, the liquid pump 320 draws the absorbent liquid in the container 32 into the liquid distribution rack 31 and sprays it evenly through each spray hole 30. At this time, the downward-falling absorbent liquid and the upward-flowing flue gas form a counter-current, which can greatly increase the contact area and contact time between the absorbent liquid and the flue gas, so that the absorbent liquid reacts more fully with the sulfides in the flue gas, thereby significantly improving the desulfurization effect. The liquid pump 320 adopts existing technology, such as a desulfurization pump of model 50DT-30.

[0023] The upper cover 43 is an arc-shaped structure with a raised upper end and a downward sloping edge. Ten guide grooves 430 are distributed in a radiating pattern on the upper cover 43. After the flue gas flows out from the gas outlet 431 at the center of the upper cover 43, it flows in the opposite direction to the downward falling absorbent liquid and is desulfurized. The residual liquid after treatment is quickly guided to the annular mounting plate 41 along a fixed path through the guide grooves 430 on the upper cover 43, so as to prevent the residual liquid from flowing, accumulating or dripping randomly on the surface of the upper cover 43.

[0024] The outer diameter of the upper cover 43 is 2 / 3 of the outer diameter of the annular mounting plate 41. A water-absorbing strip 410 is placed on the upper end of the annular mounting plate 41. When the residual liquid after desulfurization flows through the guide grooves 430 on the upper cover 43 to the annular mounting plate 41, it will fall onto the water-absorbing strip 410. When the water-absorbing strip 410 is saturated or reaches a certain service life, it is only necessary to directly replace the water-absorbing strip 410. There is no need to perform complicated cleaning or wiping on the annular mounting plate 41. The dust removal screen plate 42 can be installed with the annular mounting plate 41 and the annular mounting cylinder 430 by means of slot sliding installation, quick-release bolt fixing or snap fastening, as long as it can meet the requirements of movable installation. The water-absorbing strip 410 adopts existing technology, such as existing polymer water-absorbing resin composite strips.

[0025] There are three dust removal screens 42. The bottom dust removal screen 42 is movably installed at the center of the annular mounting plate 41. The remaining dust removal screens 42 are movably installed on the inner wall of the annular mounting cylinder 430 from top to bottom. The mesh size of each dust removal screen 42 increases sequentially from bottom to top. When the flue gas enters from the inlet 40, it flows through each dust removal screen 42 with a gradually increasing mesh size from bottom to top, thereby filtering and removing dust of various particle sizes in the flue gas in a graded manner. Compared with a single mesh size dust removal screen 42, it can more comprehensively cover the complex dust particle distribution in the flue gas and greatly improve the overall dust removal effect. The mesh sizes of the three dust removal screens 42 are 40 mesh, 100 mesh, and 200 mesh, respectively.

[0026] In actual use, the boiler flue gas dust removal and desulfurization equipment of this embodiment is operated as follows:

[0027] S1. External boiler flue gas enters the interior of the mounting base hood 2 through the inlet 40 at the bottom end of the mounting base hood 2, and flows from bottom to top through the dust removal mesh plates 42 with gradually increasing mesh size, thereby classifying and filtering out dust of various particle sizes in the flue gas.

[0028] S2. The flue gas from the boiler after dust removal flows out from the outlet 431 at the top of the upper cover 43 and flows out from the bottom of the arc cover 433 into the desulfurization and dust removal tower 1. At this time, the absorbent liquid in the container 32 is pumped into the distribution rack 31 by the liquid pump 320 and sprayed evenly through each spray hole 30. At this time, the downward falling absorbent liquid and the upward flowing flue gas form a counter-current, so that the absorbent liquid reacts more fully with the sulfides in the flue gas, thereby achieving the desulfurization effect.

[0029] S3. The flue gas from the boiler after desulfurization is discharged from the discharge port 10, while the residual liquid after desulfurization is quickly guided along a fixed path to the water absorption strip 410 on the annular mounting plate 41 through the guide grooves 430 on the upper cover 43.

[0030] S4. When it is necessary to clean the dust removal screen plate 42 or replace the water suction strip 410, simply separate the mounting base 2 from the bottom of the desulfurization and dust removal tower 1.

Claims

1. A boiler flue gas dust removal and desulfurization device, characterized in that, It includes a desulfurization and dust removal tower (1), an installation cover (2) movably installed at the bottom of the desulfurization and dust removal tower (1), a desulfurization module (3) located inside the desulfurization and dust removal tower (1), and a dust removal module (4) located on the installation cover (2). The upper end of the desulfurization and dust removal tower (1) is provided with an exhaust port (10). The dust removal module (4) includes an inlet (40) at the bottom of the mounting base (2), an annular mounting plate (41) inside the mounting base (2), a dust removal mesh plate (42) at the center of the annular mounting plate (41), and an upper cover (43) connected to the annular mounting plate (41) via an annular mounting cylinder (430). An air outlet (431) is provided at the center of the upper end of the upper cover (43), and an arc-shaped cover (433) is connected to the air outlet (431) via a connecting support rod (432).

2. The boiler flue gas dust removal and desulfurization equipment according to claim 1, characterized in that, The desulfurization module (3) includes a liquid distribution rack (31) located at the top of the desulfurization and dust removal tower (1) and having several spray holes (30) at the bottom, and a container (32) connected to the liquid distribution rack (31) and having a liquid pump (320) at the connection point.

3. The boiler flue gas dust removal and desulfurization equipment according to claim 1, characterized in that, The upper cover (43) is an arc-shaped structure with a raised upper end and a downward sloping edge. Several guide grooves (434) are distributed in a radiating pattern on the upper cover (43).

4. The boiler flue gas dust removal and desulfurization equipment according to claim 1, characterized in that, The outer diameter of the upper cover (43) is smaller than the outer diameter of the annular mounting plate (41), and a water-absorbing strip (410) is placed on the upper end of the annular mounting plate (41).

5. The boiler flue gas dust removal and desulfurization equipment according to claim 1, characterized in that, There are multiple dust removal mesh plates (42). The dust removal mesh plate (42) at the bottom is movably installed at the center of the annular mounting plate (41). The remaining dust removal mesh plates (42) are movably installed on the inner wall of the annular mounting cylinder (430) from top to bottom, and the mesh count of each dust removal mesh plate (42) distributed from bottom to top increases sequentially.

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