阅读说明：本技术 一种用于烟气脱硫塔的高通气率气液分布器 (High-ventilation-rate gas-liquid distributor for flue gas desulfurization tower ) 是由 刘玉英 梁志超 赵磊 赵雷江 张茹 车怡蕾 雷风林 刘复民 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种用于烟气脱硫塔的高通气率气液分布器,包括多根支撑梁、底板和多个箱体,多根支撑梁的两端分别横穿并焊接于烟气脱硫塔的塔壁,底板焊接在多根支撑梁的顶面,底板与塔壁之间固定有下凹的集液槽,底板和集液槽的正投影覆盖塔壁的内腔的横截面,塔壁上设有与集液槽的内腔相通的浆液排出口,多个箱体间隔布设在底板上,每个箱体上下导通,每个箱体的下端竖穿并焊接于底板,每个箱体的上端覆盖并固定有溢流槽,每个箱体的上部开设有供烟气通过的缺口,缺口的外侧设置有挡板,每块挡板自上而下斜向对应的缺口所在的箱体的外侧。本发明气液分布器结构简单,易加工制造和喷涂施工,且通气率高,能够实现气体的均匀分布。(The invention discloses a high-ventilation-rate gas-liquid distributor for a flue gas desulfurization tower, which comprises a plurality of supporting beams, a bottom plate and a plurality of box bodies, wherein two ends of the supporting beams respectively transversely penetrate through and are welded on the tower wall of the flue gas desulfurization tower, the bottom plate is welded on the top surfaces of the supporting beams, a concave liquid collecting tank is fixed between the bottom plate and the tower wall, the orthographic projection of the bottom plate and the liquid collecting tank covers the cross section of an inner cavity of the tower wall, a slurry outlet communicated with the inner cavity of the liquid collecting tank is arranged on the tower wall, the box bodies are distributed on the bottom plate at intervals, each box body is communicated up and down, the lower end of each box body vertically penetrates through and is welded on the bottom plate, an overflow groove is covered and fixed at the upper end of each box body, a notch for flue gas to pass through is formed in the upper part of each box body, baffles are arranged on the outer sides of the notches, and each baffle obliquely corresponds to the outer sides of the box bodies from top to bottom. The gas-liquid distributor disclosed by the invention is simple in structure, easy to process, manufacture and spray construction, high in ventilation rate and capable of realizing uniform distribution of gas.)

1. A high-ventilation-rate gas-liquid distributor for a flue gas desulfurization tower is characterized by comprising a plurality of supporting beams, a bottom plate and a plurality of box bodies, wherein two ends of the supporting beams respectively transversely penetrate through and are welded on the tower wall of the flue gas desulfurization tower, the bottom plate is welded on the top surfaces of the supporting beams, a concave liquid collecting tank is fixed between the bottom plate and the tower wall, the orthographic projection of the bottom plate and the liquid collecting tank covers the cross section of an inner cavity of the tower wall, a slurry outlet communicated with the inner cavity of the liquid collecting tank is arranged on the tower wall, the box bodies are arranged on the bottom plate at intervals, each box body is communicated up and down, the lower end of each box body vertically penetrates through and is welded on the bottom plate, an overflow groove is covered and fixed at the upper end of each box body, and a notch for flue gas to pass through is formed in the upper part of each box body, the outer side of the notch is provided with a baffle, and each baffle slants to the outer side of the box body where the corresponding notch is located from top to bottom.

2. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower as recited in claim 1, wherein the number of the notches formed in the upper part of each box body is two, and the two notches are symmetrically arranged on two sides of the upper part of the box body.

3. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower as claimed in claim 2, wherein each box body is of a cubic structure formed by assembling and welding two first vertical plates and two second vertical plates, the height of each first vertical plate is greater than that of each second vertical plate, the width of each first vertical plate is less than that of each second vertical plate, the bottom ends of the two first vertical plates and the two second vertical plates are parallel and level, and the positions corresponding to the fall of the top ends of the two first vertical plates and the two second vertical plates are the two notches.

4. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of claim 1, 2 or 3, wherein each overflow chute is made of a channel steel or a channel steel-like structure made of rolled steel plates.

5. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower as claimed in claim 1, wherein each baffle is fixedly connected with the box body where the corresponding notch is located through a cross rod.

6. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of claim 1, wherein each baffle is fixedly connected with the overflow chute through a vertical rod.

7. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of claim 1, wherein the lower end of each box body is welded with the bottom plate and the corresponding support beam respectively.

8. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of claim 7, wherein the support beams are arranged in parallel at equal intervals, the bottom plate is provided with a plurality of rows of mounting holes, each row of mounting holes is opposite to the gap between two adjacent support beams, and the lower end of each box body penetrates through one mounting hole and is welded to the bottom plate and the corresponding support beam respectively.

9. The high-flux gas-liquid distributor for a flue gas desulfurization tower of claim 1, wherein the sump is integrally formed with the bottom plate, the outer side of the sump is welded to the tower wall, the bottom of the sump is welded to a reinforcing beam, the reinforcing beam traverses and is welded to the tower wall, and reinforcing rods are welded between the side surfaces of the reinforcing beam and the tower wall.

10. The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of claim 9, wherein the plurality of supporting beams are all made of square steel, and the surfaces of the supporting beams are provided with non-metallic anti-corrosion coating layers.

Technical Field

The invention relates to a gas-liquid distributor of a flue gas desulfurization tower in petrochemical industry, coal chemical industry, power plants and the like, in particular to a high-ventilation-rate gas-liquid distributor for a flue gas desulfurization tower.

Background

At present, most countries in the world treat pollutants in the exhaust gas, particularly sulfur dioxide, nitrogen oxide, particulate matters and the like. In recent years, with the environmental problems becoming more and more prominent on a global scale, environmental governance is increasingly applied to various countries in the world.

Removal of SO₂The method comprises three methods of dry desulfurization, semi-dry desulfurization and wet desulfurization, wherein the wet desulfurization technology takes alkaline solution as a desulfurizing agent to generate gas-liquid chemical reaction, and the application is the most extensive and accounts for more than 90 percent.

The flue gas desulfurization tower is the core equipment among the flue gas dust removal desulphurization unit, for reaching super clean emission index, has set up internals such as alkali lye shower, gas-liquid distributor, defoamer, demister, multistage cyclone defroster in the tower, and wherein gas-liquid distributor plays key effect. The gas-liquid distributor has the functions of redistributing the flue gas sprayed from the flue gas inlet by the alkali liquor and collecting and discharging the upper washing liquid. The ventilation rate of the general draft tube type gas-liquid distributor can not meet the requirement due to the characteristics of large treatment capacity, low flow speed, small pressure drop and the like of the flue gas.

By adopting a wet desulphurization technology, the corrosion environment in the tower is severe, the slurry in the tower of a specific desulphurization device has strong acidity (the pH value is less than or equal to 1), and 316L stainless steel materials can not meet the corrosion resistance requirement. For this reason, the following two solutions are generally adopted to solve the above problems: scheme 1, partial tower shell and tower internal member materials are upgraded to super dual-phase steel such as 2205, 2507, C-276, AL6XN and the like, and the one-time investment of the scheme is high; scheme 2, desulfurizing tower and tower internals adopt carbon steel lining non-metallic anti-corrosive paint, like carbon steel lining glass scale, carbon steel lining modified Polyurea (PU), carbon steel lining nano-material etc. though disposable investment is low, tower internals are not suitable for removable bolted connection structure, are not suitable for removable groove dish gas-liquid distributor.

In addition, because the diameter of the flue gas desulfurization tower is large (more than 10 meters), the weight of the internal parts of the tower and the weight of supported slurry are heavy (more than 200 tons), and a plurality of supporting beams are required to be arranged, so that the structure in the tower is complex and the manufacturing cost is high.

Disclosure of Invention

The invention aims to solve the technical problem of providing a high-ventilation-rate gas-liquid distributor for a flue gas desulfurization tower aiming at the defects of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a high-ventilation-rate gas-liquid distributor for a flue gas desulfurization tower comprises a plurality of supporting beams, a bottom plate and a plurality of box bodies, wherein two ends of the supporting beams respectively transversely penetrate through and are welded on the tower wall of the flue gas desulfurization tower, the bottom plate is welded on the top surfaces of the supporting beams, a concave liquid collecting tank is fixed between the bottom plate and the tower wall, the orthographic projection of the bottom plate and the liquid collecting tank covers the cross section of an inner cavity of the tower wall, a slurry outlet communicated with the inner cavity of the liquid collecting tank is arranged on the tower wall, the box bodies are arranged on the bottom plate at intervals, each box body is communicated up and down, the lower end of each box body vertically penetrates through and is welded on the bottom plate, an overflow groove is covered and fixed at the upper end of each box body, and a notch for flue gas to pass through is formed in the upper part of each box body, the outer side of the notch is provided with a baffle, and each baffle slants to the outer side of the box body where the corresponding notch is located from top to bottom.

In the working process of the gas-liquid distributor, the liquid flowing area for slurry flowing is arranged outside each box body, and the gas flowing area for flue gas flowing is arranged inside each box body, so that the structure is simple, and the ventilation rate is high. The working principle of the gas-liquid distributor is as follows: the flue gas which enters the flue gas desulfurization tower from a flue gas inlet of the flue gas desulfurization tower and is sprayed and washed by alkali liquor flows upwards to the gas-liquid distributor and flows from bottom to top in each box body, and flows out from a notch at the upper part of the box body through a baffle due to the blockage of an overflow groove at the upper end of the box body. The washing slurry above the gas-liquid distributor drops from top to bottom, flows to the through liquid flowing area outside each box body through the overflow groove, is collected by the liquid collecting groove and is discharged from the slurry outlet.

Because the diameter of the flue gas desulfurization tower is larger (more than 10 meters), the weight of the bottom plate, the plurality of box bodies and the supported slurry can reach more than 200 tons, and a plurality of supporting beams are adopted in the invention. Two ends of the supporting beams respectively cross and are welded on the tower wall of the flue gas desulfurization tower, and the supporting weight is borne by the tower wall, so that the welding workload and the welding defects in the tower can be reduced.

The liquid flowing areas outside the box bodies are communicated, so that flowing and collecting of slurry are facilitated, and rust removal, polishing and anticorrosive paint construction are facilitated. The design of the liquid collecting tank is convenient for collecting and discharging the slurry.

Preferably, the number of the notches formed in the upper part of each box body is two, and the two notches are symmetrically arranged on two sides of the upper part of the box body.

Preferably, each box body is of a cubic structure formed by assembling and welding two first vertical plates and two second vertical plates, the height of each first vertical plate is greater than that of each second vertical plate, the width of each first vertical plate is smaller than that of each second vertical plate, the bottom ends of the two first vertical plates and the bottom ends of the two second vertical plates are parallel and level, and the positions corresponding to the fall of the top ends of the two first vertical plates and the top ends of the two second vertical plates are the two notches.

Preferably, each overflow groove is of a channel steel structure or a channel steel-like structure formed by rolling steel plates, the structure is simple, and raw materials are easy to obtain.

Preferably, each baffle is fixedly connected with the box body where the corresponding notch is located through a cross rod.

Preferably, each baffle is fixedly connected with the overflow groove through a vertical rod.

Preferably, the lower end of each box body is respectively welded with the bottom plate and the corresponding support beam, so that the overall rigidity of the gas-liquid distributor is improved.

Preferably, the plurality of support beams are arranged in parallel at equal intervals, the bottom plate is provided with a plurality of mounting holes in rows, each row of mounting holes is opposite to the gap between two adjacent support beams, and the lower end of each box body is penetrated through one mounting hole and is welded to the bottom plate and the corresponding support beam respectively.

Preferably, the sump is integrally formed with the bottom plate, the outer side of the sump is welded to the tower wall, the bottom of the sump is welded to a reinforcing beam, the reinforcing beam traverses and is welded to the tower wall, and reinforcing rods are welded between the side surfaces of the reinforcing beam and the tower wall.

Preferably, the supporting beams are all made of square steel, and a non-metal anti-corrosion coating layer is arranged on the surfaces of the supporting beams. The square steel is adopted as the supporting beam, the structure is simple, the welding workload and the welding deformation of the supporting beam are reduced, and the rust removal, the polishing and the construction of anticorrosive paint are easy. The surface of the square steel is provided with the non-metallic anti-corrosion coating layer, so that the cost is low and the corrosion resistance is good.

Compared with the prior art, the invention has the following advantages:

(1) the gas-liquid distributor has high ventilation rate and can realize uniform distribution of gas;

(2) the liquid flowing areas outside the box bodies are communicated, so that the flowing and the collection of the slurry are facilitated, the rust removal polishing and the construction of anticorrosive paint are facilitated, and meanwhile, the collection and the drainage of the slurry are facilitated due to the design of the liquid collecting tank;

(3) two ends of the support beams respectively cross and are welded on the tower wall of the flue gas desulfurization tower, and the support weight is borne by the tower wall, so that the welding workload and the welding defects in the tower can be reduced;

(4) the gas-liquid distributor has simple structure and is easy to process, manufacture and spray construction.

Drawings

Fig. 1 is a top view (perspective view) of a gas-liquid distributor of an embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2;

fig. 4 is a sectional view taken along line B-B in fig. 1.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The high-ventilation-rate gas-liquid distributor for the flue gas desulfurization tower of the embodiment comprises a plurality of supporting beams 1, a bottom plate 2 and a plurality of box bodies 3, wherein two ends of the supporting beams 1 respectively traverse and are welded on a tower wall 5 of the flue gas desulfurization tower, the bottom plate 2 is welded on the top surfaces of the supporting beams 1, a butt welding seam of the bottom plate 2 is arranged at the central line position of the top surface of each supporting beam 1, a concave liquid collecting tank 4 is fixed between the bottom plate 2 and the tower wall 5, the orthographic projection of the bottom plate 2 and the liquid collecting tank 4 covers the cross section of an inner cavity of the tower wall 5, a slurry outlet 51 communicated with the inner cavity of the liquid collecting tank 4 is arranged on the tower wall 5, the box bodies 3 are arranged on the bottom plate 2 at intervals, each box body 3 is communicated from top to bottom, the lower end of each box body 3 vertically penetrates through and is welded on the bottom plate 2 and the corresponding supporting beam 1, the upper end of each box body 3 covers and is fixed with an overflow groove 31, two notches 32 for flue gas to pass through are symmetrically arranged on two sides of the upper part of each box body 3, baffles 33 are arranged on the outer sides of the notches 32, each baffle 33 slants to the outer side of the box body 3 where the corresponding notch 32 is located from top to bottom at an inclined angle of 45 degrees, and each baffle 33 is fixedly connected with the box body 3 where the corresponding notch 32 is located through a cross rod 34.

In this embodiment, each box 3 is a cube structure formed by assembling and welding two first vertical plates 35 and two second vertical plates 36, the height of each first vertical plate 35 is greater than the height of each second vertical plate 36, the width of each first vertical plate 35 is less than the width of each second vertical plate 36, the bottom ends of the two first vertical plates 35 and the two second vertical plates 36 are flush, and the positions corresponding to the top end fall of the two first vertical plates 35 and the two second vertical plates 36 are two notches 32.

In this embodiment, each overflow groove 31 is of a channel steel or a channel steel-like structure formed by rolling a steel plate, each of the plurality of support beams 1 is made of square steel, a non-metal anticorrosive coating layer is disposed on the surface of each of the plurality of support beams, the liquid collection tank 4 and the bottom plate 2 are integrally arranged, the outer side of the liquid collection tank 4 is welded to the tower wall 5, the bottom of the liquid collection tank 4 is welded to a reinforcing beam 41, the reinforcing beam 41 transversely penetrates through and is welded to the tower wall 5, and a reinforcing rod 42 is welded between the side surface of the reinforcing beam 41 and the tower wall 5. In addition, the inner wall of the flue gas desulfurization tower and the surfaces of the tower internals such as the box body 3, the overflow groove 31, the liquid collecting groove 4, the bottom plate 2, the baffle plate 33 and the like need to be sprayed with non-metallic anticorrosive paint in the prior art.

In this embodiment, a plurality of supporting beams 1 are arranged in parallel at equal intervals, a plurality of mounting holes 21 are formed in a row on the bottom plate 2, each row of mounting holes 21 is opposite to the gap between two adjacent supporting beams 1, and the lower end of each box body 3 penetrates through one mounting hole 21 and is welded to the bottom plate 2 and the corresponding supporting beam 1 respectively.

In the working process of the gas-liquid distributor, the liquid flowing area S1 for flowing slurry is arranged outside each box body 3, and the gas flowing area S2 for flowing smoke is arranged inside each box body. The working principle of the gas-liquid distributor is as follows: the flue gas which enters the flue gas desulfurization tower from a flue gas inlet (not shown in the figure) of the flue gas desulfurization tower and is sprayed and washed by alkali liquor flows upwards to a gas-liquid distributor, flows from bottom to top in each box body 3, and flows out from a notch 32 at the upper part of the box body 3 through a baffle 33 due to the blockage of an overflow groove 31 at the upper end of the box body 3. The scrubbing slurry above the gas-liquid distributor drops from top to bottom, flows to the through liquid flow regions S1 outside the respective tanks 3 through the overflow tank 31, is collected by the collecting tank 4, and is discharged from the slurry discharge port 51.