An alkali liquor washing device in a desulfurization tower

Abstract

The present invention relates to the technical field of desulfurization towers, and particularly to an alkali liquor washing device inside a desulfurization tower. It includes beams, angle steel rings, trays, overflow troughs, alkali liquor inlets, strip-shaped cap covers, trough-shaped trays and alkali liquor outlets; the angle steel rings are fixedly connected with a plurality of beams on the inner wall of the desulfurization tower to form a support frame, two trays and a plurality of trough-shaped trays are fixedly connected to the support frame, a plurality of trough-shaped trays are located in the middle, and two trays are located on both sides; the overflow trough is fixedly connected to one of the trays, the alkali liquor inlet is fixedly connected to the overflow trough, and the alkali liquor outlet is fixedly connected to the other tray; multiple rows and multiple columns of strip-shaped cap covers are fixedly connected to the trough-shaped trays. The present invention has low resistance, meets the pressure drop requirements of the gas system, has high desulfurization efficiency, and avoids the leakage of alkali liquor to the lower packing layer.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurization towers, and particularly to an alkali liquor washing device in a desulfurization tower. Background Art

[0002] Vacuum carbonate desulfurization is a common coke oven gas desulfurization process. To further reduce the H2S content in coke oven gas, an alkali liquor washing section is usually added at the upper part of the desulfurization tower, and 5% NaOH solution is used to wash H2S in the gas again. The desulfurized clean gas is then used for subsequent applications. However, the existing alkali liquor washing section has a high resistance, cannot meet the pressure drop requirements of the gas system, has a low desulfurization efficiency, and the alkali liquor is easily leaked into the lower packing layer. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an alkali liquor washing device in a desulfurization tower, which has a low resistance, meets the pressure drop requirements of the gas system, has a high desulfurization efficiency, and avoids the leakage of alkali liquor into the lower packing layer.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] An alkali liquor washing device in a desulfurization tower includes a beam, an angle steel ring, a tray, an overflow trough, an alkali liquor inlet, a strip-shaped cap hood, a trough-shaped tray and an alkali liquor outlet; the angle steel ring and a plurality of beams are fixedly connected to the inner wall of the desulfurization tower to form a support frame, two trays and a plurality of trough-shaped trays are fixedly connected to the support frame, a plurality of trough-shaped trays are located in the middle, and two trays are located on both sides; the overflow trough is fixedly connected to one of the trays, the alkali liquor inlet is fixedly connected to the overflow trough, and the alkali liquor outlet is fixedly connected to the other tray; multiple rows and columns of strip-shaped cap hoods are fixedly connected to the trough-shaped trays.

[0006] The upper surfaces of the angle steel ring and the plurality of beams are on the same horizontal plane.

[0007] The tray is an arched plate with folded edges at the ends to form a weir plate, the end of the weir plate is fixedly connected to the inner wall of the desulfurization tower, and the arched plate is fixedly connected to the beam and the angle steel ring.

[0008] The overflow trough includes an overflow trough plate, an overflow trough end plate and an orifice plate; the overflow trough plate is a trough-shaped plate with a toothed weir at the end; the overflow trough end plate is a flat plate with a toothed weir at the end; the orifice plate is a flat plate with holes, the overflow trough plate is fixedly connected to the overflow trough end plate, and the orifice plate is fixedly connected to the inside of the overflow trough plate, at the position below the alkali liquor inlet.

[0009] The strip-shaped cap hood includes a strip-shaped cap hood side plate and a strip-shaped cap hood end plate; the strip-shaped cap hood side plate is provided with a folded-edge tooth slot, the strip-shaped cap hood end plate is provided with a tooth slot, and the strip-shaped cap hood end plate is fixedly connected to the end of the strip-shaped cap hood side plate.

[0010] The trough tray includes a trough plate and an end plate. The trough plate is in a trough shape and is fixedly connected to the support frame. The end plate is formed by bending a flat plate, with holes opened at the upper part and spot-welded bolts. The bottom of the end plate is fixedly connected to the support frame, and the side is fixedly connected to the trough plate.

[0011] The trough height of the trough plate is higher than the weir plate of the tray.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] In the present invention, the lye enters the full-flow tank from the lye inlet. The tank plate, end plate, and orifice plate of the full-flow tank form a lye full-flow buffer structure. The lye enters evenly and stably from the lye inlet, with low resistance, meeting the pressure drop requirements of the gas system and having high desulfurization efficiency. In the present invention, the trough height of the trough tray is higher than the weir plate of the tray, and the lye does not leak to the lower packing layer, meeting the process operation requirements. Description of the Drawings

[0014] Figure 1 It is the main view of the structure schematic diagram of the present invention;

[0015] Figure 2 It is the top view of the structure schematic diagram of the present invention;

[0016] Figure 3 It is the main view of the tray structure schematic diagram of the present invention;

[0017] Figure 4 It is the side view of the tray structure schematic diagram of the present invention;

[0018] Figure 5 It is the main view of the full-flow tank structure schematic diagram of the present invention;

[0019] Figure 6 It is Figure 5 the M-direction view of;

[0020] Figure 7 It is the schematic diagram of the orifice plate structure of the present invention;

[0021] Figure 8 It is Figure 2 the A-direction view of;

[0022] Figure 9 It is Figure 2 the B-direction view of;

[0023] Figure 10 It is Figure 9 the C-direction view of;

[0024] Figure 11 It is Figure 2 the E-direction view of;

[0025] Figure 12 It is Figure 2 the F-direction view of.

[0026] In the figure: 1 - beam; 2 - angle steel ring; 3 - tray; 4 - full-flow trough plate; 5 - lye inlet; 6 - full-flow trough end plate; 7 - orifice plate; 8 - strip cap side plate; 9 - strip cap end plate; 10 - trough-shaped plate; 11 - end plate; 12 - lye outlet; 13 - flanged tooth seam Specific embodiments

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0028] As Figure 1-12 shown, a lye washing device in a desulfurization tower includes a beam 1, an angle steel ring 2, a tray 3, a full-flow trough, a lye inlet 5, a strip cap, a trough-shaped tower plate, and a lye outlet 12.

[0029] The angle steel ring 2 is a circular structure made of angle steel. The angle steel ring 2 is fixedly connected to the inner wall of the desulfurization tower. The beam 1 is in the shape of an I-beam, and multiple beams 1 are fixedly connected in parallel in the desulfurization tower. The upper surfaces of the angle steel ring 2 and the multiple beams 1 are on the same horizontal plane, forming a support frame, which constitutes the support structure of the present invention.

[0030] The main body of the tray 3 is an arched plate with flanged ends, forming a weir plate. The end of the weir plate is welded to the inner wall of the desulfurization tower, and the arched plate is welded to the beam 1 and the angle steel ring 2.

[0031] The full-flow trough includes a full-flow trough plate 4, a full-flow trough end plate 6, and an orifice plate 7. The full-flow trough is a lye full-flow buffer structure. The full-flow trough plate 4 is a trough-shaped plate with a toothed weir at the end; the full-flow trough end plate 6 is a flat plate with a toothed weir at the end; the orifice plate 7 is a flat plate with holes. The full-flow trough plate 4 is welded to the full-flow trough end plate 6, and the orifice plate 7 is welded inside the full-flow trough plate 4, at the position below the lye inlet 5.

[0032] The strip cap side plate 8 and the strip cap end plate 9 constitute the strip cap. The strip cap side plate 8 is provided with a flanged tooth seam 13, and the liquid flow direction is as shown by the arrow. The strip cap end plate 9 is provided with a tooth seam, and the strip cap end plate 9 is welded to the end of the strip cap side plate 8.

[0033] The trough-shaped plate 10 and the end plate 11 constitute the trough-shaped tower plate, which is a lye tower plate. The trough-shaped plate 10 is a steel plate bent into a trough shape and is evenly arranged in the desulfurization tower. Both ends are supported and welded to the beam 1 or the angle steel ring 2. The end plate 11 is a flat plate bent, with holes in the upper part, and spot-welded bolts are used to fix the cap. The bottom of the end plate 11 is supported and welded to the beam 1 or the angle steel ring 2, and the side is welded to the trough-shaped plate 10.

[0034] The trough height of the trough-shaped plate 10 is higher than the weir plate of the tray 3 to prevent lye from leaking to the lower packing layer.

[0035] The angle steel ring 2 is fixedly connected to the inner wall of the desulfurization tower with multiple beams 1 to form a support frame. Two trays 3 and multiple trough-shaped tower plates are fixedly connected to the support frame. The multiple trough-shaped tower plates are located in the middle, and the two trays 3 are located on both sides. The full-flow trough is fixedly connected to the left tray 3, the lye inlet 5 is fixedly connected to the full-flow trough, and the lye outlet 12 is fixedly connected to the right tray 3. Multiple rows and columns of strip-shaped caps are fixedly connected to the trough-shaped tower plates.

[0036] The lye enters the full-flow trough from the lye inlet 5. After the buffering effect of the anti-punching plate 7, the lye passes through the toothed weir of the full-flow trough and overflows to the left tray 3. The lye level on the tray 3 rises, enters the trough-shaped tower plate through the weir plate, the lye level in the tower plate gradually rises, overflows to the weir plate of the right tray 3, flows into the right tray 3, and is discharged through the lye outlet 12. At the same time, the gas in the tower enters the cap through the gap between the trough-shaped tower plates, flows downward through the cap and contacts the lye in the trough-shaped tower plate to complete the absorption of H2S by the lye, and the gas is discharged upward through the tooth gap.

[0037] The present invention has low resistance, meets the pressure drop requirements of the gas system, has high desulfurization efficiency, and avoids the leakage of lye to the lower packing layer.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An alkali solution washing device in a desulfurization tower, characterized in that: It includes beams, angle steel rings, trays, overflow troughs, caustic liquid inlets, strip cap covers, trough-shaped trays and caustic liquid outlets; the angle steel rings are fixedly connected with multiple beams on the inner wall of the desulfurization tower to form a support frame, two trays and multiple trough-shaped trays are fixedly connected to the support frame, multiple trough-shaped trays are located in the middle, and two trays are located on both sides; the overflow trough is fixedly connected to one of the trays, the caustic liquid inlet is fixedly connected to the overflow trough, and the caustic liquid outlet is fixedly connected to the other tray; multiple rows and columns of strip cap covers are fixedly connected to the trough-shaped trays; The tray is an arched plate with flanged ends at the ends, forming a weir plate, the end of the weir plate is fixedly connected to the inner wall of the desulfurization tower, and the arched plate is fixedly connected to the beams and angle steel rings; The overflow trough includes an overflow trough plate, an overflow trough end plate and an orifice plate; the overflow trough plate is a trough-shaped plate with a toothed weir at the end; the overflow trough end plate is a flat plate with a toothed weir at the end; the orifice plate is a flat plate with holes, the overflow trough plate is fixedly connected to the overflow trough end plate, and the orifice plate is fixedly connected inside the overflow trough plate, at the position below the caustic liquid inlet; The strip cap cover includes a strip cap cover side plate and a strip cap cover end plate; the strip cap cover side plate has a flanged tooth slot, the strip cap cover end plate has a tooth slot, and the strip cap cover end plate is fixedly connected to the end of the strip cap cover side plate; The trough-shaped tray includes a trough-shaped plate and an end plate, the trough-shaped plate is trough-shaped and is fixedly connected to the support frame; the end plate is a flat plate bent, with holes in the upper part, spot-welded bolts, the bottom of the end plate is fixedly connected to the support frame, and the side is fixedly connected to the trough-shaped plate; The trough height of the trough-shaped plate is higher than the weir plate of the tray.

2. The lye washing device in a desulfurization tower according to claim 1, characterized in that: The upper surfaces of the angle steel rings and the multiple beams are on the same horizontal plane.

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