Flue gas purification synergistic disc

Abstract

The utility model discloses a flue gas purification synergistic disc, which belongs to the technical field of flue gas treatment and comprises a tubesheet, a tubesheet pore passage is arranged on the tubesheet, and a sawtooth part is arranged on the outer side of the tubesheet pore passage. The sawtooth parts of the pore channels of the tubesheet form a complex surface structure, so that the boundary length of the pore channels is increased, the contact area of gas and liquid is increased, gas-liquid mass transfer is promoted, and the gas-liquid mass transfer efficiency is improved. The device has the characteristics of simple structure, low desulfurization resistance and high desulfurization efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a flue gas purification efficiency enhancement disc. Background Art

[0002] After years of technological development, wet flue gas desulfurization equipment has evolved from the early empty tower spray technology to auxiliary efficiency enhancement devices such as Venturi rod layers, desulfurization trays and turbulators to solve the problem of original flue gas deviation and increase desulfurization efficiency. Traditional desulfurization tray technology uses sieve plates with a larger opening rate, and arranges the sieve plates on the entire cross-section of the desulfurization tower. For those with higher desulfurization efficiency requirements, two layers of desulfurization trays are generally used. Desulfurization trays can improve the desulfurization effect in two ways: (1) improve the slurry flow and reaction conditions from the desulfurization slurry side, thereby improving the desulfurization efficiency; (2) the desulfurization tray can guide the flue gas to be evenly distributed in the tower, so that the flue gas and slurry are fully in contact, which is beneficial to improving the desulfurization effect. However, when the flue gas flow rate is too high or the slurry spray volume is too large, liquid overflow is likely to occur above the desulfurization tray, resulting in unstable resistance.

[0003] Therefore, it is necessary to develop a new type of efficiency-enhancing disc to adapt to the requirements of changes in flue gas volume and circulating slurry volume and to achieve the purpose of improving efficiency and reducing resistance. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, the utility model provides a flue gas purification efficiency enhancement disk, which can improve the gas-liquid mass transfer efficiency and improve the desulfurization effect.

[0005] The utility model discloses a flue gas purification efficiency enhancement disc, comprising a flower plate, a flower plate hole channel is arranged on the flower plate, and a sawtooth portion is arranged on the outer side of the flower plate hole channel.

[0006] Preferably, a maximum inscribed circle is provided inside the flower plate hole.

[0007] Preferably, a plurality of flower plate channels are arranged at intervals on the flower plate; and a connecting portion is provided between two adjacent flower plate channels.

[0008] Preferably, the utility model further comprises a cofferdam, and the flower plate is installed on the inner side of the cofferdam.

[0009] Preferably, a bending portion bent to the side is provided on the upper side of the cofferdam; the width of the bending portion is 2-10 cm, and the height of the cofferdam is 5-25 cm.

[0010] Preferably, a plurality of reinforcing ribs are provided on the flower plate; the spacing between two adjacent reinforcing ribs is 0.4-0.6m, and the minimum distance between the reinforcing ribs and the flower plate holes on both sides is 10-50mm.

[0011] Preferably, the flue gas purification efficiency enhancement disk is a stainless steel part, and the thickness of the stainless steel part is less than or equal to 2 mm.

[0012] Preferably, the length of the flue gas purification efficiency enhancement disk is not more than meters, and the width is not more than 1.5 meters; the radius of the maximum inscribed circle on the inner side of the flower plate channel is 7.5-22.5mm, and the spacing between two adjacent flower plate channels is not more than 4mm; the ratio of the circumference to the area of ​​the flower plate channel is 0.2-0.5; the opening rate of the flower plate is 35%-55%.

[0013] Preferably, the hole of the faceplate is circular or polygonal as a whole.

[0014] Preferably, the flue gas purification efficiency enhancement disk is arranged on the efficiency enhancement layer of the desulfurization tower, and the efficiency enhancement layer is arranged on the lower side of the spray layer of the desulfurization tower; or the efficiency enhancement layer is arranged between two spray layers; the flue gas purification efficiency enhancement disk includes a square disk and a peripheral disk, and a plurality of square disks are arranged on the inner side of the efficiency enhancement layer, and the inner side of the peripheral disk is attached to the square disk, and the outer arc is attached to the side wall of the desulfurization tower.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the serrations of the flower plate channel form a complex surface structure, which increases the boundary length of the channel, increases the contact area between gas and liquid, promotes the occurrence of gas-liquid mass transfer, and improves the gas-liquid mass transfer efficiency. It has the characteristics of simple structure, low desulfurization resistance and high desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the efficiency enhancement disk;

[0017] Figure 2 It is a structural diagram of the flower board;

[0018] Figure 3 It is the horizontal distribution diagram of the efficiency enhancement disk in the desulfurization tower;

[0019] Figure 4 It is a longitudinal distribution diagram of the efficiency enhancement disk in the desulfurization tower;

[0020] Figure 5 This is another longitudinal distribution diagram of the efficiency enhancement disk in the desulfurization tower.

[0021] Markings in the figure: 1 efficiency disk, 11 cofferdam, 12 bending part, 15 square disk, 16 peripheral disk,

[0022] 2 flower plate, 21 flower plate channel, 22 serrated part, 23 connecting part, 3 reinforcing ribs, 5 desulfurization tower, 51 spray layer, 52 efficiency enhancement layer,

[0023] a The maximum inscribed circle radius of the flower plate channel, b The first spacing between adjacent flower plate channels, c The second spacing between adjacent flower plate channels, e The width of the enhancement disk, f The length of the enhancement disk, g The height of the enhancement disk, h The thickness of the bending part, l The distance between the reinforcing rib and the flower plate channel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0026] A flue gas purification efficiency enhancement disc 1, such as Figure 1 and Figure 2 , comprising a flower plate 2, the flower plate 2 is provided with a flower plate channel 21, and the outer side of the flower plate channel 21 is provided with a serration 22. Among them, the serration 22 is evenly distributed.

[0027] The serrations 22 of the plate channel 21 form a complex surface structure, which increases the boundary length of the channel, increases the contact area between gas and liquid, promotes gas-liquid mass transfer, and improves gas-liquid mass transfer efficiency. The plate 2 also has the characteristics of simple structure, low desulfurization resistance, and high desulfurization efficiency, which can reduce the operating cost of the flue gas purification system. The construction and modification cost of the efficiency-enhancing disk is low, which is very suitable for the efficiency-enhancing and consumption-reducing modification of the flue gas purification system.

[0028] like Figure 2 , a maximum inscribed circle is provided inside the flower plate hole 21. A plurality of flower plate holes 21 are arranged on the flower plate 2 at intervals; a connecting portion 23 is provided between two adjacent flower plate holes 21.

[0029] like Figure 1 The utility model also includes a cofferdam 11, and the flower plate 2 is installed on the inner side of the cofferdam 11. A bending portion 12 bent to the side is provided on the upper side of the cofferdam 11 to improve the overall strength. The bending portion 12 is preferably processed by integral bending, or the cofferdam can be welded to the edge of the flower plate. A plurality of reinforcing ribs 3 are provided on the flower plate 2 to improve the overall strength of the utility model. The flue gas purification efficiency enhancement disc 1 and its various parts are made of stainless steel, such as 316L stainless steel and above, preferably 2205 stainless steel.

[0030] In a specific design, the width h of the bending portion 12 is 2-10cm, the height g of the cofferdam 11 is 5-25cm, the spacing between two adjacent reinforcing ribs 3 is 0.4-0.6m, the distance l between the reinforcing ribs and the flower plate channels on both sides is 10-50mm, and no channel is provided at the connection between the reinforcing ribs and the flower plate channels. The thickness of the stainless steel part is less than or equal to 2mm (≮2mm), preferably 3-5mm. The length f of the flue gas purification efficiency enhancement disc 1 is not greater than 2 meters (≯2m), preferably 1-1.6m; the width e is not greater than 1.5 meters (≯1.5m), preferably 0.7-1m. The radius a of the maximum inscribed circle inside the flower plate channel 21 is 7.5-22.5mm, and the spacing b and c between two adjacent flower plate channels 21 are not greater than 4mm; the circumference to area ratio of the flower plate channel 21 is 0.2-0.5; the opening rate of the flower plate 2 is 35%-55%. When the flue gas empty tower velocity reaches 3.9m / s or above, the recommended opening ratio is ≮47%.

[0031] When the efficiency enhancement disk is arranged on the cross section of the absorption tower, the flue gas velocity at the windward position is high, and the opening rate of this part of the position should be reduced. It is recommended to control the opening rate of this area to be 2%-4% lower than that of other areas.

[0032] When the material thickness is 3 mm, a reinforcing rib is preferably provided every 0.4-0.6 m, and when the material thickness is 5 mm, a reinforcing rib is preferably provided every 0.6-1 m. The contact position between the reinforcing rib and the flower plate is connected by welding.

[0033] The shape of the faceplate hole can include but is not limited to circular, triangular, square or polygonal, and the ratio of perimeter to area is 0.2-0.5, preferably 0.25-0.35. Figure 2 The flower disc hole is triangular in shape as a whole.

[0034] like Figure 4 and Figure 5 The efficiency enhancement disk 1 is assembled in a modular manner and can be arranged in a single layer or in multiple layers. The flue gas purification efficiency enhancement disk 1 is arranged on the efficiency enhancement layer 52 of the desulfurization tower 5, and the efficiency enhancement layer 52 is arranged on the lower side of the spray layer 51 of the desulfurization tower 5; or the efficiency enhancement layer 52 is arranged between two spray layers 51; Figure 3 The flue gas purification efficiency enhancement disk 1 includes a square disk 15 and a peripheral disk 16. Multiple square disks 15 are arranged on the inner side of the efficiency enhancement layer 52. The inner side of the peripheral disk 16 is attached to the square disk 15, and the outer arc is attached to the side wall of the desulfurization tower 5.

[0035] The utility model has a simple structure and is suitable for wet purification of flue gas in thermal power plant boilers, steelmaking, aluminum smelting, ships and other chemical and non-electrical factories.

[0036] During use, the flue gas passes through the flower plate from the bottom of the efficiency enhancement disk, and the desulfurization slurry is sprayed from the spray layer of the desulfurization tower above to the top of the efficiency enhancement disk. On the flower plate of the efficiency enhancement disk, the gas and liquid first come into contact, and a large number of unstable bubbles are formed at the openings on the flower plate, which increases a large amount of gas-liquid contact area. At the same time, the continuous breakage and continuous generation of bubbles form a large number of fine droplets above the efficiency enhancement disk, which also increase the gas-liquid mass transfer contact area. The cofferdam of the efficiency enhancement disk can play the role of reinforcing ribs on the one hand, and on the other hand, it can prevent the slurry from gathering in the low place due to the tilt of the installation surface of the efficiency enhancement disk. The reinforcing ribs strengthen the structural strength of the efficiency enhancement disk, so as to reduce the thickness of the plate and save manufacturing costs.

[0037] Compared with the traditional ordinary tray (round hole desulfurization tray), the efficiency-enhancing tray of the utility model adopts a special fractal principle to design the shape of the opening, and forms a complex surface structure by setting a series of interconnected small holes or channels on the tray. These structures can greatly increase the boundary length of the opening, increase the contact area between the gas and the liquid, promote the occurrence of gas-liquid mass transfer, and thus improve the gas-liquid mass transfer efficiency of the tray. At the same time, the special structure makes the tray have excellent anti-scaling performance, so that it can maintain a very low desulfurization resistance for a long time.

[0038] In a specific embodiment, the flower plate channel of the efficiency disk 1 is an equilateral triangle as a whole, with a maximum inscribed circle diameter of 21mm, a spacing of 6mm between channels, and an absorption tower diameter of 17.5 meters. After flow field simulation, the flue gas velocity is high opposite the flue gas inlet, so the first efficiency disk with an opening rate of 48% is arranged in this part of the area, and the second efficiency disk with an opening rate of 50% is arranged in other areas, that is, a comprehensive arrangement of square disks with two opening rates. The empty tower flow rate is 3.9m / s, and the maximum liquid-gas ratio is 14.3. After actual operation, it is found that the efficiency disk resistance is less than 600Pa, which can reduce the operation of one spray layer and ensure that the flue gas emission meets the requirements, achieving the purpose of improving efficiency, saving energy and reducing resistance.

[0039] Therefore, the efficiency enhancement disk of the embodiment of the utility model, also called the SPC efficiency enhancement disk, has a simple structure, low desulfurization resistance, high desulfurization efficiency, and can reduce the operating cost of the flue gas purification system. Its construction and transformation costs are low, and it is very suitable for the efficiency improvement and consumption reduction transformation of the flue gas purification system.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas purification efficiency enhancement disc, characterized in that: It comprises a flower plate (2), the flower plate (2) is provided with a flower plate channel (21), and the outer side of the flower plate channel (21) is provided with a serration portion (22); A maximum inscribed circle is provided inside the flower plate hole (21); a plurality of flower plate holes (21) are arranged at intervals on the flower plate (2); A connecting portion (23) is provided between two adjacent flower plate holes (21).

2. The flue gas purification efficiency enhancement disk according to claim 1 is characterized in that: It also comprises a cofferdam (11), and the flower plate (2) is installed on the inner side of the cofferdam (11).

3. The flue gas purification efficiency enhancement disk according to claim 2 is characterized in that: The upper side of the cofferdam (11) is provided with a bending portion (12) bent toward the side; The width of the bending portion (12) is 2-10 cm, and the height of the cofferdam (11) is 5-25 cm.

4. The flue gas purification efficiency enhancement disk according to claim 2 is characterized in that: The flower plate (2) is provided with a plurality of reinforcing ribs (3); The distance between two adjacent reinforcing ribs (3) is 0.4-0.6m. The minimum distance between the reinforcing ribs and the flower plate holes on both sides is 10-50mm.

5. The flue gas purification efficiency enhancement disk according to claim 2 is characterized in that: The flue gas purification efficiency enhancement disk is made of stainless steel. The thickness of the stainless steel part is less than or equal to 2 mm.

6. The flue gas purification efficiency enhancement disk according to claim 2 is characterized in that: The length of the flue gas purification efficiency enhancement disk is not more than meters, and the width is not more than 1.5 meters; The radius of the maximum inscribed circle inside the flower plate hole (21) is 7.5-22.5 mm. The distance between two adjacent flower plate holes (21) is no greater than 4 mm; The ratio of the perimeter to the area of ​​the flower plate channel (21) is 0.2-0.5; The opening rate of the flower plate (2) is 35%-55%.

7. The flue gas purification efficiency enhancement disk according to claim 1 is characterized in that: The faceplate hole (21) is circular or polygonal in shape as a whole.

8. The flue gas purification efficiency enhancement disk according to any one of claims 1 to 7, characterized in that: The flue gas purification efficiency enhancement disk is arranged on the efficiency enhancement layer (52) of the desulfurization tower (5). The efficiency enhancement layer (52) is arranged on the lower side of the spray layer (51) of the desulfurization tower (5); or the efficiency enhancement layer (52) is arranged between two spray layers (51); The flue gas purification efficiency enhancement disk (1) comprises a square disk (15) and an outer peripheral disk (16). A plurality of square disks (15) are arranged on the inner side of the efficiency enhancement layer (52); the inner side of the peripheral disk (16) is attached to the square disk (15) and the outer arc is attached to the side wall of the desulfurization tower (5).

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