An energy-saving device for a wet flue gas desulfurization spray tower

Abstract

The present invention provides an energy-saving device for a wet desulfurization spray tower, which is arranged on the tower wall of the wet desulfurization spray tower between the inlet of the wet desulfurization spray tower and the lowest spray layer. The device includes a reinforcing plate fixed on the inner side of the tower wall, a bottom plate connected to the reinforcing plate, a side plate installed on the inner side of the bottom plate, a pull rod, a sealing plate, a breather pipe and a guide plate. At least two pull rods are arranged between the side plate and the bottom plate, and two ends of each pull rod are respectively connected to the inner wall of the side plate and the upper wall of the bottom plate. An inclined sealing plate is welded between the lower bottom surface of the bottom plate and the tower wall. At least two breather pipes are arranged on the tower wall below the bottom plate. Guide plates are arranged at two ends of the bottom plate. One end of each guide plate is connected to the reinforcing plate, and a liquid discharge outlet is formed between the other end of the guide plate and the side plate. The device can effectively solve the problem of solid accumulation at the tower inlet, avoid the "waterfall" phenomenon, reduce the flue gas resistance and achieve energy saving.

Description

Technical Field

[0001] The present invention relates to the technical field of wet flue gas desulfurization spray towers, and in particular to an energy-saving device for a wet flue gas desulfurization spray tower.

Background Art

[0002] At present, in industries such as thermal power, iron and steel, metallurgy, and cement in China, wet flue gas desulfurization spray towers are mainly used to remove sulfur dioxide in flue gas. After the spray nozzles in the spray layer near the tower wall spray the absorption liquid onto the inner wall of the desulfurization spray tower, the absorption liquid will flow downward along the tower wall. When the absorption liquid flows to the flue gas inlet, it will flow down in a "waterfall" shape.

[0003] On the one hand, when the absorption liquid flows to the flue gas inlet, it flows down in a "waterfall" shape. The "waterfall"-shaped absorption liquid will block the flue gas entering the spray tower, increasing the flue gas resistance, and thus increasing the energy consumption of the desulfurization fan. On the other hand, the "waterfall" will cause solid substances to accumulate in the flue gas inlet flue, increasing the flue gas resistance, and thus increasing the energy consumption of the desulfurization fan.

[0004] In order to overcome the above problems, the patent with the Chinese authorization announcement number CN 208260533 U discloses an inlet device for a wet desulfurization tower. Although this device reduces the energy consumption to a certain extent, there are still some deficiencies. For example, the structure is not simple enough; there are many tie rods between the trough side plate and the tower wall, there are many weld points on the tower wall, and the anti-corrosion construction difficulty in the connection area between the tie rod and the tower wall is large, increasing the safety hazard of the tower wall and the maintenance cost; since the tower wall is in an arc structure, the slurry discharged from both sides of the slurry discharge tank will directly impact the tower wall, increasing the risk of the tower wall being worn through; the trough bottom plate, the tower body, and the inclined sealing plate form a closed structure, and the stress generated by the change of the internal air pressure will have an adverse impact on the welds and the internal structure. Now, an energy-saving device for a wet flue gas desulfurization spray tower is proposed.

Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art, and propose an energy-saving device for a wet flue gas desulfurization spray tower, which can effectively solve the problem of solid substance accumulation at the tower inlet, and at the same time avoid the "waterfall" phenomenon, reduce the flue gas resistance, and achieve energy saving.

[0006] To achieve the above object, the present invention provides an energy-saving device for a wet desulfurization spray tower, which is arranged on the tower wall of the wet desulfurization spray tower between the inlet of the wet desulfurization spray tower and the lowermost spray layer, and includes a reinforcing plate fixed on the inner side of the tower wall, a bottom plate connected to the reinforcing plate, a side plate installed on the inner side of the bottom plate, a pull rod, a sealing plate, a breather pipe and a deflector. At least two pull rods are provided between the side plate and the bottom plate, and the two ends of the pull rod are respectively connected to the inner wall of the side plate and the upper wall of the bottom plate. An inclined sealing plate is welded between the lower bottom surface of the bottom plate and the tower wall. At least two breather pipes are provided on the tower wall below the bottom plate. Deflectors are provided at both ends of the bottom plate. One end of the deflector is connected to the reinforcing plate, and a liquid discharge outlet is formed between the other end of the deflector and the side plate.

[0007] Preferably, the bottom plate is horizontally installed, the reinforcing plate and the side plate are vertically installed, and the included angle between the side plate and the bottom plate is 90°.

[0008] Preferably, the reinforcing plate and the side plate are arc-shaped, the bottom plate is fan-shaped, and the outer side of the bottom plate is connected to the middle position of the height of the reinforcing plate.

[0009] Preferably, the bottom plate is symmetrically arranged with respect to the center line of the inlet of the wet desulfurization spray tower, being high in the middle and low on both sides.

[0010] Preferably, the pull rods are arranged at equal intervals, and the included angle between the pull rod and the bottom plate is 10° to 80°.

[0011] Preferably, the side plate is a stepped structure, the height of the middle part of the side plate is the smallest, and the height of the side plate gradually increases step by step from the middle part to both sides.

[0012] Preferably, the included angle α between the bottom plate and the sealing plate is 30° to 60°.

[0013] Preferably, the breather pipes are arranged at equal intervals, the breather pipe is an L-shaped elbow pipe, and includes a first branch pipe arranged horizontally and a second branch pipe arranged obliquely. One end of the first branch pipe is connected to the inner side of the tower wall, and the other end of the first branch pipe extends with a downwardly bent second branch pipe.

[0014] Preferably, the included angle α between the deflector and the center line of the desulfurization spray tower inlet is 30° to 60°, and a support rod is further provided between the deflector and the bottom plate, and the support rod is arranged on the side of the deflector away from the liquid discharge outlet.

[0015] Preferably, the reinforcing plate, the bottom plate, the side plate, the pull rod, the sealing plate, the breather pipe, the deflector and the support rod are all made of corrosion-resistant alloy steel or carbon steel lined with anti-corrosion materials.

[0016] Advantages of the present invention: Through the cooperation of the reinforcing plate, bottom plate, side plate, tie rod, sealing plate, air permeable pipe and flow guiding plate, etc., the bottom plate and side plate can effectively collect the wall flow liquid above the inlet of the wet flue gas desulfurization spray tower, lead it out by the flow guiding plate, and discharge it to the slurry pool from both sides of the inlet of the wet flue gas desulfurization spray tower, avoiding the formation of a "waterfall" phenomenon at the inlet of the desulfurization spray tower, and at the same time avoiding the direct scouring of the tower wall by the wall flow liquid, reducing the flue gas resistance and achieving energy conservation.

[0017] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the drawings.

Description of the Drawings

[0018] Figure 1 is a top view structural schematic diagram of an energy-saving device for a wet flue gas desulfurization spray tower of the present invention;

[0019] Figure 2 is Figure 1 side view in the AA direction of

[0020] Figure 3 is Figure 1 view in the B direction of

[0021] Figure 4 is Figure 1 enlarged schematic diagram at position I of

[0022] Figure 5 is Figure 3 enlarged schematic diagram at position II of

Specific Embodiments

[0023] Refer to Figures 1 to 5 An energy-saving device for a wet flue gas desulfurization spray tower of the present invention is arranged on the tower wall 9 of the wet flue gas desulfurization spray tower between the inlet 10 of the wet flue gas desulfurization spray tower and the lowermost spray layer 11, and includes a reinforcing plate 1 fixed on the inner side of the tower wall 9, a bottom plate 2 connected to the reinforcing plate 1, a side plate 3 installed on the inner side of the bottom plate 2, a tie rod 4, a sealing plate 5, an air permeable pipe 6 and a flow guiding plate 7. At least two tie rods 4 are arranged between the side plate 3 and the bottom plate 2, and two ends of the tie rod 4 are respectively connected to the inner wall of the side plate 3 and the upper wall of the bottom plate 2. An inclined sealing plate 5 is welded between the lower bottom surface of the bottom plate 2 and the tower wall 9 for supporting the bottom plate 2, side plate 3, tie rod 4 and the collected wall flow liquid; meanwhile, it plays a role in guiding the flue gas and reducing the flue gas resistance; at least two air permeable pipes 6 are arranged on the tower wall 9 below the bottom plate 2 to ensure that the closed structure formed by the bottom plate 2, sealing plate 5 and tower wall 9 is not under positive or negative pressure, ensuring the structural stability and safety; flow guiding plates 7 are arranged at both ends of the bottom plate 2, one end of the flow guiding plate 7 is connected to the reinforcing plate 1, and a liquid discharge outlet is formed between the other end of the flow guiding plate 7 and the side plate 3. The liquid discharge outlet is on the side of the bottom plate 2 away from the tower wall 9, and the flow guiding plate 7 discharges the collected wall flow liquid to the slurry pool, which can avoid the direct scouring of the tower wall 9 by the wall flow liquid.

[0024] Further, the bottom plate 2 is horizontally installed, the reinforcing plate 1 and the side plate 3 are vertically installed, and the included angle between the side plate 3 and the bottom plate 2 is 90°. Specifically, the reinforcing plate 1 and the side plate 3 are arc-shaped, the bottom plate 2 is fan-shaped, and the outer side of the bottom plate 2 is connected to the middle position of half of the height of the reinforcing plate 1.

[0025] Further, the bottom plate 2 is symmetrically arranged with respect to the center line of the inlet 10 of the wet flue gas desulfurization spray tower, being high in the middle and low on both sides, which is beneficial to guiding the collected wall flow liquid from the middle to both sides and flowing out from the liquid discharge outlet.

[0026] Further, the pull rods 4 are arranged at equal intervals, and the included angle between the pull rods 4 and the bottom plate 2 is 10 - 80°.

[0027] Further, the side plate 3 is a stepped structure, see the appendix Figure 4 . The height of the middle part of the side plate 3 is the smallest, and the height of the side plate 3 gradually increases step by step from the middle part to both sides, which is beneficial to saving materials while meeting the requirement of collecting wall flow.

[0028] Further, the included angle α between the bottom plate 2 and the sealing plate 5 is 30 - 60°.

[0029] Further, the vent pipes 6 are arranged at equal intervals, the vent pipes 6 are L-shaped bent pipes, including a first branch pipe arranged horizontally and a second branch pipe arranged obliquely. One end of the first branch pipe is communicated with the inner side of the tower wall 9, and the other end of the first branch pipe extends with a second branch pipe bent downward.

[0030] Further, the included angle α between the baffle plate 7 and the center line of the desulfurization spray tower inlet 10 is 30 - 60°. A support rod 8 is also arranged between the baffle plate 7 and the bottom plate 2, and the support rod 8 is arranged on the side of the baffle plate 7 away from the liquid discharge outlet to strengthen the strength of the baffle plate 7.

[0031] Further, the reinforcing plate 1, the bottom plate 2, the side plate 3, the pull rods 4, the sealing plate 5, the vent pipes 6, the baffle plate 7 and the support rod 8 are all made of corrosion-resistant alloy steel or carbon steel lined with anti-corrosion materials.

[0032] The working process of the present invention:

[0033] An energy-saving device for a wet flue gas desulfurization spray tower according to the present invention can collect the wall flow liquid above the inlet 10 of the wet flue gas desulfurization spray tower by arranging a bottom plate 2, side plates 3 and a guide plate 7, and export the collected wall flow liquid to both sides, and discharge it to the slurry pond through a liquid discharge outlet, so as to avoid the wall flow liquid directly scouring the tower wall 9. The device effectively solves the problem of solid accumulation at the tower inlet, improves the operating environment of the flue gas inlet of the desulfurization spray tower, prolongs the service life of the material, and at the same time avoids the "waterfall" phenomenon, reduces the flue gas resistance, and realizes energy saving.

[0034] The above embodiments are illustrative of the present invention and not restrictive thereof. Any scheme obtained by simply transforming the present invention belongs to the protection scope of the present invention.

Claims

1. An energy-saving device for a wet flue gas desulfurization spray tower, which is arranged on the tower wall (9) of the wet flue gas desulfurization spray tower between the inlet (10) of the wet flue gas desulfurization spray tower and the lowest spray layer (11), and is characterized in that: It includes a reinforcing plate (1) fixed to the inner side of the tower wall (9), a bottom plate (2) connected to the reinforcing plate (1), a side plate (3) installed inside the bottom plate (2), a tie rod (4), a sealing plate (5), a breather pipe (6) and a baffle plate (7). At least two tie rods (4) are provided between the side plate (3) and the bottom plate (2). The two ends of the tie rod (4) are respectively connected to the inner wall of the side plate (3) and the upper wall of the bottom plate (2). An inclined sealing plate (5) is welded between the lower bottom surface of the bottom plate (2) and the tower wall (9). At least two breather pipes (6) are provided on the tower wall (9) below the bottom plate (2). Baffle plates (7) are provided at both ends of the bottom plate (2). One end of the baffle plate (7) is connected to the reinforcing plate (1), and a liquid discharge outlet is formed between the other end of the baffle plate (7) and the side plate (3).

2. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The bottom plate (2) is horizontally installed, the reinforcing plate (1) and the side plate (3) are vertically installed, and the included angle between the side plate (3) and the bottom plate (2) is 90°.

3. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1 or 2, characterized in that: The reinforcing plate (1) and the side plate (3) are arc-shaped, the bottom plate (2) is fan-shaped, and the outer side of the bottom plate (2) is connected to the middle position of half of the height of the reinforcing plate (1).

4. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The bottom plate (2) is symmetrically arranged with respect to the center line of the wet flue gas desulfurization spray tower inlet (10), with the middle part being high and the two sides being low.

5. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The tie rods (4) are arranged at equal intervals, and the included angle between the tie rod (4) and the bottom plate (2) is 10 to 80°.

6. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The side plate (3) is a stepped structure, the height of the middle part of the side plate (3) is the smallest, and the height of the side plate (3) gradually increases step by step from the middle part to both sides.

7. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The included angle α between the bottom plate (2) and the sealing plate (5) is 30 to 60°.

8. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The breather pipes (6) are arranged at equal intervals. The breather pipe (6) is an L-shaped elbow pipe, including a first branch pipe arranged horizontally and a second branch pipe arranged obliquely. One end of the first branch pipe is connected to the inside of the tower wall (9), and the other end of the first branch pipe extends with a downwardly bent second branch pipe.

9. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 1, characterized in that: The included angle α between the baffle plate (7) and the center line of the desulfurization spray tower inlet (10) is 30 to 60°. A support rod (8) is also provided between the baffle plate (7) and the bottom plate (2), and the support rod (8) is arranged on the side of the baffle plate (7) away from the liquid discharge outlet.

10. The energy-saving device for a wet flue gas desulfurization spray tower according to claim 9, characterized in that: The reinforcing plate (1), the bottom plate (2), the side plate (3), the tie rod (4), the sealing plate (5), the breather pipe (6), the baffle plate (7) and the support rod (8) are all made of corrosion-resistant alloy steel or carbon steel lined with anti-corrosion materials.

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