JP3242613U - Tray support structure for absorption tower - Google Patents

Abstract

A tray support structure for an absorber tower is provided. A plurality of tray support suspension fixed beams (12), each tray support suspension fixed beam (12) is fixed below the spray layer support beam, a tray support beam (13) is fixed between each tray support suspension fixed beam (13), and a hole is provided. The trays with holes are fixed to the tray support beams by alloy bolts, and each tray with holes is located between two adjacent spray layers of the desulfurization absorption tower, and the structure can meet the tray support demand of the absorption tower. At the same time, it has the characteristics of a short construction period and a low cost of refurbishment. [Selection drawing] Fig. 7

Description

The present invention belongs to the field of flue gas desulphurization and relates to a tray support structure for an absorber tower.

Against the background of the target desulfurization efficiency improvement and energy-saving modification, in order to further improve the mass transfer ability between flue gas and slurry in the absorber tower, especially in the low-concentration _SO2 area in the upper part of the spray area, the substance of _SO2 As migration forces decline, relying solely on spraying methods requires large liquid/gas ratios to ensure that effluent concentrations meet environmental protection standards. When an alloy tray with holes is added below the spray layer of the low-concentration _SO2 area, the slurry forms a liquid film on the tray, and after contacting and mixing with the flue gas flowing back up, the gas-liquid two-phase substance It enhances the transfer effect, so that high desulfurization efficiency can be obtained under the operating condition of low liquid/gas ratio, realizing the purpose of energy saving and efficiency improvement of the absorption tower. The trays also serve to homogenize the flue gas flow field, improve the operating conditions of the downstream mist eliminator, and enhance the absorption of fine particles.

The tray support structure currently in common use mounts the tray beams inside the absorber tower and the trays are secured to the top of the tray support beams by alloy fasteners. For new absorption towers, this structure is already mature, but it has obvious deficiencies when it comes to efficiency improvement or energy saving retrofitting to conventional absorption towers. Taking an absorber tower used in combination with a 300 MW coal-fired power unit as an example, the centerline distance of the two-layer spray layer pipe is typically 2000 mm, and the diameter Φ of the spray layer pipe is 750 mm. A tray support structure commonly used today is used to place a layer of alloy trays between two spray layer pipes, and the height of the tray support beams is 500mm, the spray layer nozzle and tray The distance is less than 750 mm, failing to meet the process requirement of a nozzle to tray distance of at least 1000 mm. In this case, it is usually only possible to cut the wall of the absorption tower between the two spray layers, increase the distance between the spray layers by a jack-up method, and readjust the arrangement. However, in this way, in addition to the high construction risk and long construction period, the pump head of the slurry circulation pump in the upper spray layer is insufficient, and it is necessary to replace the equipment used in combination. Higher refurbishment costs.

The purpose of the present invention is to overcome the above-mentioned drawbacks of the prior art, and to provide a tray support structure for absorption tower, which can meet the needs of absorption tower tray support, and has a short construction cycle and retrofitting. It is characterized by low cost.

To achieve the above objectives, the tray support structure for absorption tower of the present invention comprises a plurality of tray support suspension fixed beams, each tray support suspension fixed beam is fixed below a spray layer support beam, and a tray support beam is fixed between each tray support suspension fixed beam, a perforated tray is fixed to the tray support beam by an alloy bolt, each perforated tray is located between two adjacent spray layers of the desulfurization absorber.

The tray support suspension fixed beam is welded below the spray layer support beam,
The tray support beam is welded to the tray support suspension fixed beam.

Glass flakes or rubber linings are provided on the surfaces of both the tray support suspension fixed beam and the tray support beam.

The section of the tray support suspension fixed beam has a rectangular structure with a size of 650 mm x 200 mm,
The cross-section of the tray support beam is a rectangular structure with a size of 120mm x 120mm.

The distance between the perforated tray and the spray layer pipe is 1310 mm.

The interval between adjacent tray support suspension fixed beams is 3000 mm.

The number of tray support suspension fixed beams is four.

The interval between the center lines of two adjacent tray support beams is 1450 mm.

Each tray support suspension fixed beam is parallel and equidistantly distributed.

The tray support structure for absorption tower of the present invention uses tray support suspension fixed beams and tray support beams to place perforated trays between two adjacent spray layers of the desulfurization absorption tower during specific operation. , the desulfurization efficiency and energy saving effect of the absorption tower can be improved, and there is no need to increase the pump head of the slurry circulation pump in the spray layer. Compared to the tray support structure currently in general use, the amount of work involved in remodeling the absorption tower is obviously reduced, and there is no need to increase the tower height, shortening the remodeling construction period and improving the flue and slurry circulation. The amount of modification work corresponding to related equipment such as pumps is reduced, thereby greatly reducing the modification investment.

1 is a schematic diagram of a commonly used desulfurization absorption tower 1. FIG. 1 is a schematic plan view of a current tray support structure; FIG. 1 is a perspective layout schematic diagram of a current tray support structure; FIG. 4 is a schematic diagram of a tray with holes 9. FIG. FIG. 4 is a structural schematic diagram of the spray layer and support beams; FIG. 2 is a schematic plan view of the structure of the present invention; FIG. 2 is a schematic perspective view of the present invention in Embodiment 1; FIG. 2 is a schematic perspective view of the second embodiment of the present invention;

In order for those skilled in the art to better understand the means of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. In addition, the described embodiments are merely some embodiments of the present invention, not all embodiments, and are not intended to limit the scope disclosed in the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts disclosed in the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

The drawings show structural schematic diagrams according to the embodiments disclosed in the present invention. These figures are not drawn to scale and certain details may be exaggerated and certain details may be omitted for clarity of illustration. The shapes of the various regions, layers and their relative sizes and positions shown are merely exemplary and in practice deviations may occur due to manufacturing tolerances or technical limitations, and those skilled in the art will appreciate Regions/layers with different shapes, sizes and relative positions can be designed differently according to actual needs.

As shown in FIGS. 1-6, coal flue gas enters the desulfurization absorber 1 through the inlet flue 2, passes through the absorber's spray region 6 where it is purified, and then enters the absorber's mist eliminator region 7. The droplets carried by the flue are removed and finally discharged through the outlet flue 3 . The lower part of the desulfurization absorption tower 1 is a slurry pool, and the slurry in the slurry pool is sucked from the circulating slurry outlet nose 4 by the corresponding slurry circulating pump, further sent to the circulating slurry inlet nose 5 by the corresponding slurry circulating pump, and the corresponding Entering the spray layer pipe 11 of each layer, the spray layer pipe 11 is equipped with a downward slurry nozzle, and the slurry discharged vertically downward comes into contact with the flue gas flowing backward to complete the flue gas cleaning process. Inside some absorber towers that have undergone ultra-low emission retrofit projects, a single layer of perforated trays 9 is placed between the bottom spray layer pipe 11 and the inlet flue 2, FIG. As shown in FIGS. 3 and 4, the conventional arrangement is provided with a layer of tray support beams 13, with alloy bolts welded on the top, and trays 9 with holes are fixed above the tray support beams 13. Although the structure is simple, the height of the tray support beam 13 is high, usually 500 mm or more, so that it can be used in some positions where the space is small, such as between the upper and lower spray layer pipes 11. , it is not possible to mount the perforated tray 9 in this configuration while maintaining the process requirement that the distance between the spray layer nozzle and the surface of the perforated tray 9 is at least 1000 mm.

Example 1
As shown in FIG. 7, one layer of perforated trays 9 is added below the uppermost spray layer pipe 11 in the desulfurization absorber 1, and a typical 300 MW coal-fired power unit desulfurization absorber is used as an example. The diameter Φ of the tower is 13.0 m. First, the tray support suspension fixed beam 12 needs to be welded below the conventional top layer spray layer support beam 10, and four tray support suspension fixed beams are installed in the cross section. 12 are installed in parallel, the interval between the adjacent tray support suspension fixed beams 12 is 3000 mm, and they are fixed to the inner wall of the desulfurization absorption tower 1 by welding. use. The tray support beam 13 has a rectangular structure with a cross section of 120 mm×120 mm, and is welded slightly below between the tray support suspension fixed beams 12. A bolt made of 2205 material is previously welded to the upper surface of the tray support beam 13. . Corrosion prevention is applied to the surfaces of the tray support suspension fixed beams 12 and the tray support beams 13 using glass flakes or rubber lining. After the above construction is completed, the perforated tray 9 is fixed on the upper surface of the tray support beam 13 by alloy bolts, and the distance between the perforated tray 9 and the top spray layer pipe 11 is 1310 mm, which meets the process requirements.

Example 2
As shown in FIG. 8, in the desulfurization absorber 1, one layer of perforated trays 9 is added between the second spray layer pipe 11 and the third spray layer pipe 11 from top to bottom. Taking the desulfurization absorption tower of a typical 300MW coal-fired power unit as an example, the diameter Φ of the absorption tower is 13.0m. Four tray support suspension fixed beams 12 are attached in parallel to the cross section, and the interval between adjacent tray support suspension fixed beams 12 is 3000 mm. The beam 12 is made of 650 mm×200 mm square steel and carbon steel. The tray support beam 13 has a rectangular structure with a cross section of 120 mm×120 mm, and is welded slightly below between the tray support suspension fixed beams 12. A bolt made of 2205 material is previously welded to the upper surface of the tray support beam 13. . Glass flakes or rubber lining is applied to the surfaces of both the tray support suspension fixed beams 12 and the tray support beams 13 to prevent corrosion. 13, the distance between the perforated tray 9 and the upper spray layer pipe 11 is 1310 mm, which meets the process requirements.

Although the tray support structure commonly used today is relatively simple and suitable for new absorption towers, the present invention is more suitable for retrofit projects to add trays between the spray layers of conventional absorption towers. Are suitable.

It should be noted that the above examples are not intended to limit the technical solution of the present invention, but are merely used to describe it. It should be understood that modifications and equivalent substitutions can be made to the specific embodiments of the present invention, and any modifications and equivalent substitutions that do not depart from the spirit and scope of the present invention are not covered by the claim for utility model registration of the present invention. should be included in the scope.

a brief description of the sign

1 desulfurization absorber 2 inlet flue 3 outlet flue 4 circulating slurry outlet nose 5 circulating slurry inlet nose 6 absorber spray area 7 absorber mist eliminator area 8 tray beam 9 perforated tray 10 spray layer support beam 11 spray layer Piping 12 tray support suspension fixed beam 13 tray support beam

Claims (9)

A tray support structure for an absorber tower, comprising a plurality of tray support suspended fixed beams (12), each tray supported suspended fixed beam (12) fixed below a spray bed support beam (10) and comprising a tray support beam ( 13) are fixed between each tray support suspension fixed beam (12), the perforated trays (9) are fixed to the tray support beams (13) by alloy bolts, and each perforated tray (9) is attached to the desulfurization absorption tower. A tray support structure for an absorber tower, characterized in that it is located between two adjacent spray layers. the tray support suspension fixed beam (12) is welded below the spray layer support beam (10);
The tray support structure for an absorber tower according to claim 1, characterized in that the tray support beam (13) is welded to the tray support suspension fixed beam (12). 2. The tray support structure for an absorption tower according to claim 1, wherein the surfaces of both the tray support suspension fixed beams (12) and the tray support beams (13) are provided with glass flakes or rubber linings. The cross section of the tray support suspension fixed beam (12) is a rectangular structure with a size of 650mm x 200mm,
The tray support structure for an absorption tower according to claim 1, characterized in that the cross section of the tray support beam (13) is a rectangular structure with a size of 120 mm x 120 mm. 2. The tray support structure for an absorption tower according to claim 1, characterized in that the distance between the perforated tray (9) and the spray bed conduit (11) is 1310 mm. The tray support structure for an absorber tower according to claim 1, characterized in that the spacing between adjacent tray support suspension fixed beams (12) is 3000 mm. 2. The tray support structure for an absorption tower according to claim 1, wherein the number of tray support suspension fixed beams (12) is four. 2. The tray support structure for an absorption tower according to claim 1, characterized in that the distance between the center lines of two adjacent tray support beams (13) is 1450 mm. 2. A tray support structure for an absorber tower according to claim 1, characterized in that each tray support suspension fixed beam (12) is parallel and equidistantly distributed.

Images