Double-inlet wet desulphurization absorption tower

Abstract

The utility model discloses a double-inlet wet desulphurization absorption tower which comprises an absorption tower body, a tray is arranged in the absorption tower body, air inlets are arranged on two sides of the absorption tower body, the two air inlets are positioned below the tray, the air inlets are connected with an air inlet pipe, a vertical middle partition plate is arranged in the absorption tower body, and the middle partition plate is connected with an air outlet pipe. The middle partition plate is located between the two air inlets. According to the utility model, a single inlet of the absorption tower is changed into double inlets, and the middle partition plate is additionally arranged between the tray of the absorption tower and the slurry tank, so that the flow field distribution in the flue and the absorption tower is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of absorption towers, in particular to the technical field of a double-inlet wet desulfurization absorption tower. Background Art

[0002] The absorption tower is the core component of the wet flue gas desulfurization system. The flue gas inlet of the absorption tower in the prior art is mostly a single-side inlet. By adding a tray or other rectifying device at the bottom of the spray layer, the uniformity of flue gas distribution in the tower can be improved.

[0003] After the flue gas from one side enters the absorption tower, due to reasons such as the flue structure, it is difficult for the flue gas to quickly achieve uniform distribution in front of the tray, resulting in the slurry and flue gas not being quickly mixed and evenly, affecting the desulfurization efficiency. Although pressure equalization devices such as trays and venturi rods are added inside the desulfurization tower, the uniformity of the airflow at the first spray layer cannot be guaranteed. Moreover, the flue gas enters from one side, and the flow rate at the entrance of the absorption tower is relatively high, resulting in insufficient liquid-gas mixing, reduced slurry residence time, and affecting the desulfurization efficiency. The uneven distribution of flue gas at the spray layer is also prone to the following problems:

[0004] 1. The slurry and flue gas cannot be mixed quickly and evenly, the liquid-gas contact ratio decreases, and the desulfurization efficiency decreases;

[0005] 2. Generate local backflow and vortex, which will increase the smoke resistance, increase the fan energy consumption and increase the operating cost;

[0006] 3. The partially swirling flue gas carries droplets from the spray layer that easily capture gypsum particles in the tower, depositing on the inner wall of the tower and the internal support rods, easily forming hard scale. Utility Model Content

[0007] The purpose of the utility model is to solve the problems in the prior art and to provide a double-inlet wet desulfurization absorption tower which can solve the above problems.

[0008] To achieve the above-mentioned purpose, the utility model proposes a double-inlet wet desulfurization absorption tower, including an absorption tower body, a tray is provided in the absorption tower body, air inlets are provided on both sides of the absorption tower body, the two air inlets are located below the tray, the air inlets are connected to air inlet pipes, and a vertical middle partition is provided in the absorption tower body, and the middle partition is located between the two air inlets.

[0009] Preferably, two air inlet pipes are symmetrically arranged on both sides of the middle partition.

[0010] Preferably, a spray layer is provided above the tray, and a demisting layer is provided above the spray layer.

[0011] Preferably, a guide plate is provided in the air inlet pipe, and the guide plate is arranged close to the air inlet.

[0012] Preferably, the connecting section between the air inlet pipe and the air inlet is arranged to be inclined downward.

[0013] Beneficial effects of the utility model: The utility model improves the flow field distribution in the flue and the absorption tower by changing the single inlet of the absorption tower to a double inlet and adding a middle partition between the absorption tower tray and the slurry pool. The utility model improves the flow field distribution in the absorption tower, and at the same time, the slurry and the flue gas can be quickly and fully mixed, the gas-liquid contact time can be extended, and the desulfurization efficiency can be improved; the reflux and vortex in the tower can be eliminated, the pressure loss can be reduced, the energy consumption can be reduced, and the cost can be reduced; the deposition of dust particles on the inner wall of the tower and the internal support rods can be reduced, and hard scale can be effectively reduced.

[0014] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is a flow field simulation test diagram of the utility model;

[0018] Figure 4 This is a cross-sectional flow field simulation test diagram of the utility model;

[0019] Figure 5 It is a flow field simulation test diagram of the prior art;

[0020] Figure 6 It is a cross-sectional flow field simulation test diagram of the prior art.

[0021] In the figure: 1-absorption tower body, 2-tray, 3-air inlet pipe, 4-middle partition, 5-spray layer, 6-demist layer. DETAILED DESCRIPTION

[0022] See also Figure 1 , Figure 2 A double-inlet wet desulfurization absorption tower comprises an absorption tower body 1, a tray 2 is arranged in the absorption tower body 1, air inlets are arranged on both sides of the absorption tower body 1, the two air inlets are located below the tray 2, the air inlets are connected to the air inlet pipe 3, a vertical middle partition 4 is arranged in the absorption tower body 1, the middle partition 4 is located between the two air inlets, two air inlet pipes 3 are symmetrically arranged on both sides of the middle partition 4, a spray layer 5 is arranged above the tray 2, a demisting layer 6 is arranged above the spray layer 5, a guide plate is arranged in the air inlet pipe 3, the guide plate is arranged close to the air inlet, and the connecting section between the air inlet pipe 3 and the air inlet is arranged downwardly inclined.

[0023] The flow field simulation test was carried out by computational fluid dynamics software CFD. The test results are as follows Figure 3 and Figure 4 As shown, Figure 5 and Figure 6 This is a test result diagram of the prior art. By comparison, it can be concluded that the flow field distribution in the absorption tower and in front of the spray layer is significantly improved. After optimization, the flow field in front of the first spray layer is basically uniform, which effectively eliminates the local vortex caused by uneven flue gas.

[0024] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A double-inlet wet desulfurization absorption tower, characterized in that: The invention comprises an absorption tower body (1), wherein a tray (2) is arranged inside the absorption tower body (1), air inlets are arranged on both sides of the absorption tower body (1), the two air inlets are located below the tray (2), the air inlets are connected to air inlet pipes (3), and a vertical middle partition (4) is arranged inside the absorption tower body (1), and the middle partition (4) is located between the two air inlets.

2. The double-inlet wet desulfurization absorption tower according to claim 1, characterized in that: The two air intake pipes (3) are symmetrically arranged on both sides of the middle partition plate (4).

3. The double-inlet wet desulfurization absorption tower according to claim 1, characterized in that: A spray layer (5) is provided above the tray (2), and a demisting layer (6) is provided above the spray layer (5).

4. The double-inlet wet desulfurization absorption tower according to claim 1, characterized in that: A guide plate is arranged in the air inlet pipe (3), and the guide plate is arranged close to the air inlet.

5. The double-inlet wet desulfurization absorption tower according to claim 1, characterized in that: The connecting section between the air inlet pipe (3) and the air inlet is arranged to be inclined downward.

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