Wet desulphurization slurry stirring and oxidation aeration device

Abstract

The utility model discloses a wet desulphurization slurry stirring and oxidation aeration device which comprises an aeration tank, a plurality of aeration stirring assemblies are arranged at the bottom of the aeration tank, each aeration stirring assembly comprises a breather pipe and a reducer pipe which are arranged in a sleeved mode, and the reducer pipe is a pipeline which is gradually shrunk and then gradually expanded. A throat section is arranged between the reducing section and the diverging section of the reducer pipe, a gap is reserved between the inlet end of the reducer pipe and the bottom of the aeration tank, wet desulphurization slurry enters the reducer pipe through the gap, the outlet end of the breather pipe is arranged at the throat section of the reducer pipe, and the opening of the breather pipe faces the outlet end of the reducer pipe. The utility model can simultaneously realize stirring and aeration of slurry, does not need to rotate blades, and has a simple structure.

Description

Technical Field

[0001] The utility model relates to an aeration device for wet desulfurization slurry, belonging to the technical field of gas-liquid contact devices. Background Art

[0002] The absorption tower slurry in wet flue gas desulfurization is a liquid mixture used to absorb sulfur dioxide in the flue gas during the desulfurization process. The absorption tower slurry needs to be stirred and ventilated to increase the oxygen content for oxidation operation.

[0003] In the existing technology, absorption tower slurry stirring mainly involves mechanical stirring and pulse suspension stirring. The main drawbacks are: the mechanical stirring device has a complex structure and high cost; the stirring blades and pulse pump are subject to severe wear and tear, and require high maintenance. The oxidation system, on the other hand, uses two methods: an oxidation air pipe network and an oxidation air spray gun. The former has a complex pipeline layout and high cost, and the pipe aeration holes are prone to structural blockage, making maintenance difficult. The oxidation air spray gun has fewer aeration points, making oxidation efficiency difficult to guarantee. It must be used in conjunction with a mechanical agitator, but its structure hinders stirring, reducing stirring efficiency and causing severe wear and tear on the spray gun. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the task of the present invention is to provide a wet desulfurization slurry stirring and oxidation aeration device, the purpose of which is to achieve simultaneous stirring and oxidation of the slurry and make the equipment easy to maintain.

[0005] The technical solution of the present utility model is as follows: A wet desulfurization slurry stirring and oxidation aeration device includes an aeration tank, wherein a plurality of aeration stirring components are provided at the bottom of the aeration tank, wherein the aeration stirring components are sleeved vent pipes and reducers, wherein the reducer is a pipe which first gradually contracts and then gradually expands, and the throat section is between the gradually contracting section and the gradually expanding section of the reducer, and a distance is left between the inlet end of the reducer and the bottom of the aeration tank, and the wet desulfurization slurry enters the reducer through the distance, and the outlet end of the vent pipe is provided at the throat section of the reducer and opens toward the outlet end of the reducer.

[0006] Furthermore, the outlet end of the reducer is provided with a dividing blade, and the dividing blade forms a flow area and a non-flow area on the cross section of the reducer.

[0007] Furthermore, a triangular ridge is provided on a surface of the split blade facing the inlet of the reducer.

[0008] Furthermore, the area of ​​the non-circulation region gradually increases from the center of the cross section of the reducer toward the outside.

[0009] Furthermore, the outlet end of the vent pipe is arranged on the central axis of the reducer.

[0010] Furthermore, the outlet end of the reducer is provided with a straight section, and the split blades are arranged in the straight section.

[0011] Furthermore, the reducer is vertically arranged in the aeration tank.

[0012] The advantages of this utility model compared with the prior art are:

[0013] This utility model utilizes the Venturi principle through a reducer. While the vent pipe ejects air, the inlet of the reducer rapidly draws in wet desulfurization slurry. This drives solids such as crystals deposited at the bottom of the aeration tank upward along with the liquid. During the air mixing process, stirring occurs, achieving simultaneous stirring and aeration, which is beneficial to the reaction of materials in the slurry. Furthermore, no rotating blades are required, making maintenance easier. Furthermore, split blades are provided to further pulverize bubbles generated within the gradually expanding reducer, thereby increasing the gas-liquid contact area and improving the slurry oxidation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the aeration and stirring assembly of the wet desulfurization slurry stirring and oxidation aeration device in an embodiment.

[0015] Figure 2 It is a cross-sectional schematic diagram of the aeration and stirring assembly of the wet desulfurization slurry stirring and oxidation aeration device in an embodiment.

[0016] Figure 3 Schematic diagram of the structure of a split blade (one) in the embodiment.

[0017] Figure 4 It is a structural schematic diagram of the wet desulfurization slurry stirring and oxidation aeration device of an embodiment.

[0018] Figure 5 It is a schematic top view of the structure of the wet desulfurization slurry stirring and oxidation aeration device of the embodiment. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments, but they are not intended to limit the present invention.

[0020] Please combine Figures 1 to 5 As shown, the wet flue gas desulfurization slurry stirring and oxidation aeration device of the present invention includes an aeration tank 1. The specific shape of the aeration tank 1 is not particularly required and can be configured according to the site of use. A plurality of aeration stirring assemblies 2 are disposed at the bottom of the aeration tank 1. These aeration stirring assemblies 2 can be arranged in a matrix of rows and columns, or in a staggered arrangement of rows and columns to achieve uniform distribution at the bottom of the aeration tank.

[0021] Each aeration and stirring assembly 2 primarily consists of two components: a vent pipe 201 and a reducer 202. The reducer 202 is mounted on the vent pipe 201. Specifically, the vent pipe 201 is a conventional circular tube. All vent pipes 201 are connected by a single intake manifold 3, which is connected to the oxidation blower. This allows all aeration and stirring assemblies 2 to perform aeration and stirring simultaneously. The vent pipes 201 can also be grouped and connected to different intake manifolds 3. By controlling the opening and closing of different intake manifolds 3 and the ventilation flow rate, the aeration and stirring level at different locations within the aeration tank can be adjusted, facilitating control according to different operating conditions.

[0022] The reducer 202 is a pipe that first gradually converges and then gradually expands. The throat section 202c is located between the converging section 202a and the expanding section 202b of the reducer 202. In this embodiment, for optimal performance, the reducer 202 is vertically positioned at the bottom of the aeration tank 1. The lower end of the reducer 202 is the inlet, and the upper end is the outlet. A gap is left between the inlet of the reducer 202 and the bottom of the aeration tank 1. After aeration begins, the wet desulfurization slurry is drawn into the reducer 202 through this gap. The vent pipe 201 extends from the inlet of the reducer 202 into the reducer 202. The outlet of the vent pipe 201 is located at the throat section 202c of the reducer 202 and is located on the central axis of the reducer 202. The opening of the vent pipe 201 faces the outlet of the reducer 202, meaning that the outlet of the vent pipe 201 is also oriented vertically upward.

[0023] When using this device, it should be ensured that the outlet end of the reducer 202 is located below the slurry surface. When aeration and stirring are required, air is introduced through the air inlet main pipe 3 and ejected from the outlet end of the vent pipe 201. As the air is ejected, a low-pressure area is formed in the throat section 202c of the reducer 2. The thick slurry on the lower side quickly converges to the low-pressure area at the throat section 202c, and further flows upward with the air ejected from the outlet end of the vent pipe 201. In this process, the air and slurry are mixed and broken to form small bubbles, completing the stirring and mixing of the slurry.

[0024] To further enhance the mixing effect, this embodiment also includes a straight section 202d at the outlet of the reducer 202. Within this section are split blades 4, which can be sleeved onto the outlet of the reducer 202 for easy maintenance and replacement. After the straight section 202d is installed, the top surface of the straight section 202d should be positioned below the slurry level during use. The split blades 4 create a barrier between the slurry and air in the cross-section of the reducer 202. Specifically, the split blades 4 create a flow area and a non-flow area within the cross-section of the reducer 202. The presence of the split blades 4 reduces the flow rate of the slurry and air in the non-flow area, further dispersing them and improving the mixing effect. In this embodiment, the split blades 4 are multiple fan-shaped blades, with the non-flow area gradually increasing in size from the center of the reducer's cross-section outward. Triangular ridges 4a are provided on the bottom surface of the split blades 4, the side facing the reducer's inlet, to enhance the bubble separation effect.

Claims

1. A wet desulfurization slurry stirring and oxidation aeration device, comprising an aeration tank, characterized in that: A plurality of aeration and stirring components are provided at the bottom of the aeration tank. The aeration and stirring components are sleeved vent pipes and reducers. The reducer is a pipe that first gradually contracts and then gradually expands. The throat section is between the gradually contracting section and the gradually expanding section of the reducer. A distance is left between the inlet end of the reducer and the bottom of the aeration tank. The wet desulfurization slurry enters the reducer through the distance. The outlet end of the vent pipe is provided at the throat section of the reducer and opens toward the outlet end of the reducer.

2. The wet desulfurization slurry stirring and oxidation aeration device according to claim 1 is characterized in that: The outlet end of the reducer is provided with a dividing blade, and the dividing blade forms a flow area and a non-flow area on the cross section of the reducer.

3. The wet desulfurization slurry stirring and oxidation aeration device according to claim 2, characterized in that: A triangular ridge is provided on one side of the split blade facing the inlet of the reducer.

4. The wet desulfurization slurry stirring and oxidation aeration device according to claim 2, characterized in that: The area of ​​the non-circulation region gradually increases from the center of the cross section of the reducer toward the outside.

5. The wet desulfurization slurry stirring and oxidation aeration device according to claim 1, characterized in that: The outlet end of the vent pipe is arranged on the central axis of the reducer.

6. The wet desulfurization slurry stirring and oxidation aeration device according to claim 2, characterized in that: The outlet end of the reducer is provided with a straight section, and the split blades are arranged in the straight section.

7. The wet desulfurization slurry stirring and oxidation aeration device according to claim 1, characterized in that: The reducing pipe is vertically arranged in the aeration tank.

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