A high-efficiency cyclone tray suitable for ship exhaust gas scrubber

Abstract

The invention discloses a high-efficiency cyclone tray suitable for a ship exhaust gas scrubber, comprising a connecting plate and a plurality of cyclone components placed on the connecting plate; wherein a plurality of through holes are provided on the connecting plate, the cyclone component comprises an outer cylinder, an inner cylinder and cyclone blades arranged on the outer peripheral wall of the inner cylinder, and a drainage inlet for the absorbent to pass through is provided at the bottom of the outer cylinder. The cyclone component comprises a peripheral cyclone component placed on the inner peripheral wall of the cyclone tray and an internal cyclone component close to the center of the cyclone tray, a drainage component for the absorbent to pass through is provided on the peripheral cyclone component, and the drainage component comprises a drainage pipe and an annular pipe placed on the inner wall of the outer cylinder, one end of the drainage pipe is arranged on the outer side of the outer cylinder, extending outward, and the other end is connected to the annular pipe. A plurality of circular holes are provided on one side of the annular pipe close to the cyclone blades. The absorbent is broken into tiny droplets by the cyclone effect of the cyclone component, fully reacts with the flue gas, and effectively captures the flue gas escaping from the surrounding area, thereby improving the flue gas desulfurization efficiency.

Description

Technical Field

[0001] The invention relates to the field of desulfurization environmental protection equipment, in particular to ship exhaust gas treatment washing tower equipment. Background Art

[0002] As the national environmental protection policy becomes increasingly strict, most ship exhaust gases need to be desulfurized. Ship desulfurization technology mainly absorbs polluted gases through a scrubber. Its main working principle is: the flue gas enters the scrubber and reacts with the sprayed absorbent, and the harmful gases and particulate matter contained in it are absorbed by the absorbent. After the flue gas is purified to meet the standards, it is discharged into the atmosphere through a demister. Therefore, the purification effect of the scrubber is directly related to whether the entire desulfurization equipment meets the standards.

[0003] The scrubbers currently used are mostly spray towers, packed towers, sieve plate towers, etc. Most of them are packed towers. Although the packed tower has a simple structure, the packing is easy to clog. During cleaning and maintenance, the packing loss is large, and the probability of clogging under dry burning conditions is greatly increased. The sieve plate tower has a large pressure drop and low operating flexibility, and the operation is usually difficult to adjust. The main purification function of the spray tower is too dependent on the performance of the nozzle. To achieve a better atomization effect, it is usually necessary to use a smaller nozzle, which increases the risk of nozzle clogging. Generally, the absorption efficiency of the scrubber is mainly related to the reaction time of the flue gas and the absorbent, the contact area between the flue gas and the absorbent, and the pressure loss of the flue gas, and the absorption efficiency of the existing scrubbers still needs to be improved. Summary of the invention

[0004] The present invention mainly solves the problem that the existing exhaust gas desulfurization treatment device has a poor mixing effect of alkali solution and absorbent, and provides a high-efficiency cyclone tower plate suitable for ship exhaust gas washing tower, which has the purpose of desulfurization treatment of ship exhaust gas. This solution reduces the pressure loss of flue gas while improving the flue gas purification efficiency.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A high-efficiency cyclone tray suitable for a ship exhaust gas scrubber comprises a connecting plate and a plurality of cyclone components placed on the connecting plate; wherein a plurality of through holes are provided on the connecting plate, the cyclone components comprise an outer cylinder, an inner cylinder and cyclone blades arranged on the outer peripheral wall of the inner cylinder, and a drainage inlet for an absorbent to pass through is provided at the bottom of the outer cylinder.

[0007] Optionally, the connecting plate is provided with mounting holes matching the cyclone components, and a plurality of cyclone components are symmetrically mounted on the connecting plate. The cyclone components include a peripheral cyclone component disposed on the inner wall of the cyclone tray and an internal cyclone component close to the center of the cyclone tray.

[0008] Optionally, a drainage assembly for the absorbent to pass through is provided on the peripheral vortex assembly, the drainage assembly includes a drainage pipe and an annular tube arranged on the inner wall of the outer cylinder, one end of the drainage pipe is arranged on the outside of the outer cylinder and extends outward, and the other end is connected to the annular tube.

[0009] Optionally, a plurality of circular holes are opened on one side of the annular tube close to the swirl blades, the plurality of circular holes are arranged on the inner circumferential wall of the annular tube and are spaced apart from each other along the circumferential direction of the annular tube, and a discharge hole is arranged at the lower end of the annular tube.

[0010] Optionally, the swirl blade further includes a plurality of blades spaced apart from each other along the circumferential direction of the inner tube, wherein the blade includes a blade body and a curved portion, wherein the inner end of the blade body is connected to the outer circumferential wall of the inner tube, the inner end of the curved portion is connected to the end of the blade body, and the bending angle of the middle section of the blade body is 5-15°.

[0011] Optionally, a sealing plate is provided on the upper part and / or the bottom part of the inner cylinder, and the sealing plate is used to prevent the flue gas from directly passing through the inner cylinder and reacting with the absorbent.

[0012] Optionally, the diameter of the outer cylinder is 400-800 mm, and the diameter of the inner cylinder is 30-60 mm.

[0013] Optionally, the diameter of the circular holes of the annular tube is 6-12 mm, and the distance between the circular holes is 80-120 mm.

[0014] Optionally, the number of swirl components is not less than 5.

[0015] According to another aspect of the present invention, the high-efficiency cyclone tray is applied to a ship exhaust gas scrubbing system.

[0016] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0017] 1. By setting up a cyclone tray, multiple cyclones with the same rotation direction are formed when the flue gas passes through the tray, which increases the residence time of the flue gas inside the scrubbing tower, makes the reaction time of the flue gas and the absorbent longer, and improves the flue gas purification effect.

[0018] 2. The sprayed absorbent is broken into smaller droplets by the cyclone tearing of the cyclone tray, which increases the contact area between the flue gas and the absorbent and improves the desulfurization efficiency of the exhaust gas.

[0019] 3. Make the pressure drop of flue gas through the cyclone tray smaller. For the same diameter scrubber, the flow rate of flue gas through the cyclone tower is higher than that of the packed tower. The higher the flow rate, the more obvious the cyclone effect of flue gas through the tray. Under the same flue gas purification effect, the height of the cyclone tower can be appropriately reduced, thereby reducing the manufacturing cost of the scrubber and making it more convenient for engineering installation and maintenance. Especially for ship scrubbers, due to the limited space of the ship structure, the use of the cyclone tray structure can reduce the height of the scrubber, reduce the weight of the scrubber, and reduce the impact of the weight of the scrubber on the navigation safety of the ship.

[0020] 4. Flue gas can react effectively at high and low flow rates. Compared with packed towers, no flooding will occur on the trays. The tower design safety factor is small. Even if there are large suspended solids in the absorbent components, there is no danger of tray blockage. For dry burning conditions, the cyclone trays can also operate well, and the system operation is safer and more reliable.

[0021] 5. The cyclone tray is composed of cyclone components and connecting plates. It is easy to install and maintain, reducing the cost of engineering installation and maintenance.

[0022] 6. The middle section of the blade is bent at a certain angle. The bending angle can not only adjust the resistance loss of the flue gas, but also buffer the washed absorbent on the tray, increasing the reaction time between the absorbent and the flue gas. The folded plate at the end of the blade can effectively reduce the escape of the flue gas around the blade and enhance the swirl effect of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of the overall structure of an embodiment of a high-efficiency cyclone tray suitable for a ship exhaust gas scrubber;

[0024] Figure 2 is a structural diagram of a swirl assembly in an embodiment;

[0025] Figure 3 The present invention is a schematic diagram of a swirl blade of an embodiment of a high-efficiency swirl tray applicable to a ship exhaust gas scrubber;

[0026] Figure 4 The present invention is a schematic diagram of the installation of a cyclone tray of an embodiment of a high-efficiency cyclone tray suitable for a ship exhaust gas washing tower.

[0027] Description of the numbers in the figure:

[0028] 1-connecting plate, 2-swirl assembly, 3-drainage pipe, 4-drainage inlet, 5-inner cylinder, 6-swirl blade, 7-annular tube, 8-outer cylinder, 9-swirl tray, 10-spray layer, 11-washing tower, 12-demister. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0030] Those skilled in the art should understand that, in the disclosure of the present invention, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0031] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0032] Exemplary embodiments according to the present invention will be described below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, in order to solve the above problems, an embodiment of the present invention provides a high-efficiency cyclone tray suitable for a ship exhaust gas washing tower, which is applied to a ship exhaust gas washing system. By setting a cyclone component 2, the flue gas and the absorbent react better, thereby improving the desulfurization efficiency.

[0034] Specifically, the high-efficiency cyclone tray at least includes a connecting plate 1 and a plurality of cyclone components 2 placed on the connecting plate 1. The connecting plate 1 is provided with a plurality of through holes, through which the flue gas can react with the lower liquid holding layer on the tray, thereby ensuring the desulfurization efficiency while minimizing the pressure drop of the entire tray. The through hole shape can be a square hole or a round hole. The connecting plate is provided with mounting holes for the cyclone components 2, and the plurality of cyclone components 2 are symmetrically mounted on the connecting plate 1.

[0035] The cyclone assembly 2 includes an outer cylinder 8, an inner cylinder 5, and cyclone blades 6 arranged on the outer peripheral wall of the inner cylinder 5. The bottom of the outer cylinder 8 is provided with a drainage inlet 4 for the absorbent to pass through. A part of the flue gas passing through the cyclone tray 9 goes upward through the through holes on the connecting plate 1, and the other part of the flue gas passes through the cyclone assembly 2 to form multiple cyclones in the same direction. The flue gas swirling upward fully contacts and reacts with the absorbent sprayed down, and the purified flue gas is finally discharged to the atmosphere through the demister 12.

[0036] Optionally, the cyclone assembly 2 includes a peripheral cyclone assembly placed on the inner wall of the cyclone tray 9 and an internal cyclone assembly near the center of the cyclone tray 9. The peripheral cyclone assembly is provided with a drainage assembly for the absorbent to pass through, and the drainage assembly includes a drainage pipe 3 and an annular pipe 7 placed on the inner wall of the outer tube 8. One end of the drainage pipe 3 is arranged on the outer side of the outer tube 8 and extends outward, and the other end is connected to the annular pipe 7. Specifically, compared with the central area of ​​the cyclone tray 9, the spray density in the peripheral area is relatively small, so the possibility of smoke escaping from the peripheral area is greater. By setting the drainage pipe 3, a part of the absorbent is introduced into the peripheral cyclone assembly.

[0037] More specifically, a plurality of circular holes are provided on one side of the annular tube 7 close to the swirl blade 6, and the plurality of circular holes are provided on the inner peripheral wall of the annular tube 7 and are spaced apart from each other along the circumferential direction of the annular tube 7. By introducing the absorbent into the peripheral swirl assembly, the actual spray absorbent density in the peripheral area of ​​the swirl tray 9 is increased, and the absorbent is broken into tiny droplets by the swirl effect of the swirl assembly 2, and fully reacts with the flue gas. Thus, the flue gas escaping from the peripheral area is effectively captured, and the desulfurization efficiency of the flue gas is improved.

[0038] In addition, the swirl blade 6 further includes a plurality of blades spaced from each other along the circumferential direction of the inner tube 5, wherein the blade includes a blade body and a curved portion, wherein the inner end of the blade body is connected to the outer peripheral wall of the inner tube 5, the inner end of the curved portion is connected to the end of the blade body, and the middle section of the blade body is bent to form 5-15°. When the swirl blade 6 is installed, the angle between the blade and the horizontal direction is about 45°, the blade height is about 60-100mm, and the angle formed by the bending of the middle section of the blade is about 10 degrees. Through the bending angle, not only the resistance loss of the flue gas can be adjusted, but also the absorbent washed down will be buffered on the tower plate, increasing the reaction time between the absorbent and the flue gas. The type of the folding plate at the end of the blade can effectively reduce the escape of the flue gas around the blade and enhance the swirl effect of the flue gas. The number of blades is not less than 8.

[0039] In addition, a sealing plate is provided on the upper part and / or the bottom part of the inner tube 5 , and the sealing plate is used to prevent the flue gas from directly passing through the inner tube 5 and reacting with the absorbent.

[0040] In this embodiment, the size of the outer cylinder 8 is about 400-800 mm; under the premise of ensuring installation and manufacturing, in order to improve the swirl effect, the inner cylinder 5 needs to be as small as possible, generally about 50 mm. According to the different tower diameters, the swirl components 2 are arranged in a centrally symmetrical manner, and the number of swirl components 2 is not less than 5.

[0041] It is worth noting that the diameter of the circular holes on the annular tube 7 is 6-12 mm to ensure that the absorbent will not be blocked in the aperture, and the spacing of the circular holes is about 100 mm. In addition, the circular holes are opened at a 45° angle to prevent the absorbent from being difficult to flow and blocking the circular holes in the absence of pressure.

[0042] The working principle and use process of the present invention are as follows: the flue gas enters from the bottom of the scrubbing tower 11 and passes through the cyclone tray 9 inside the cyclone tray. The cyclone tray 9 includes a connecting plate 1, a cyclone component 2 and a drainage component. A through hole is provided on the connecting plate 1. The opening rate of the connecting plate 1 is determined according to the flue gas pressure and the pressure loss considered in the design. The mounting holes of the cyclone components 2 are reserved on the connecting plate 1, and a plurality of cyclone components 2 are symmetrically installed on the connecting plate 1. A part of the flue gas passing through the cyclone tray 9 goes upward through the through hole on the connecting plate 1, and another part of the flue gas passes through the cyclone component 2 to form multiple cyclones in the same direction. The flue gas swirling upward fully contacts and reacts with the absorbent sprayed down. The purified flue gas is finally discharged into the atmosphere through the demister 12. At the same time, the absorbent is sprayed into the surrounding cyclone components through the circular holes to increase the actual spray absorbent density in the surrounding area of ​​the cyclone tray 9. Relying on the cyclone effect of the cyclone component 2, the absorbent is broken into tiny droplets to fully react with the flue gas. Thereby, the flue gas escaping from the surrounding area is effectively captured, and the desulfurization efficiency of the flue gas is improved. The bottom of the outer cylinder 8 is also provided with a drainage inlet 4 for the absorbent to pass through. The drainage inlet 4 is a regular semicircular hole, so that the absorption liquid retained on the connecting plate 1 can pass through the small hole and enter the cyclone component 2 under the drainage effect to react with the flue gas again.

[0043] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] It should be noted that:

[0045] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. In addition, it should be noted that the shapes, names, etc. of the parts and components of the specific embodiments described in this specification may be different. All equivalent or simple changes made based on the structure, features and principles of the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the technical field to which the present invention belongs may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A high-efficiency cyclone tray suitable for a ship exhaust gas scrubber, characterized in that: At least: A connecting plate (1) and a plurality of swirl components (2) disposed on the connecting plate (1); A plurality of through holes are provided on the connecting plate (1); the cyclone assembly (2) comprises an outer cylinder (8), an inner cylinder (5) and cyclone blades (6) arranged on the outer peripheral wall of the inner cylinder (5); a flow inlet (4) for the absorbent to pass through is provided at the bottom of the outer cylinder (8); a mounting hole matching the cyclone assembly (2) is provided on the connecting plate (1); a plurality of cyclone assemblies (2) are symmetrically mounted on the connecting plate (1); the cyclone assembly (2) comprises a peripheral cyclone assembly arranged on the inner peripheral wall of a cyclone tray (9) and an internal cyclone assembly close to the center of the cyclone tray (9); The peripheral vortex assembly is provided with a drainage assembly for the absorbent to pass through, the drainage assembly comprising a drainage pipe (3) and an annular pipe (7) arranged on the inner wall of the outer tube (8), one end of the drainage pipe (3) is arranged on the outer side of the outer tube (8) and extends outward, and the other end is connected to the annular pipe (7); a plurality of circular holes are provided on a side of the annular pipe (7) close to the vortex blades (6), the plurality of circular holes are provided on the inner peripheral wall of the annular pipe (7) and are spaced apart from each other along the circumferential direction of the annular pipe (7), and a discharge hole is provided at the lower end of the annular pipe (7); The swirl blade (6) further includes a plurality of blades spaced apart from each other along the circumferential direction of the inner tube (5), wherein the blade includes a blade body and a curved portion, the inner end of the blade body is connected to the outer circumferential wall of the inner tube (5), the inner end of the curved portion is connected to the end of the blade body, and the angle formed by the bending of the middle section of the blade body is 5°-15°.

2. The high-efficiency cyclone tray suitable for a ship exhaust gas scrubber according to claim 1, characterized in that: A sealing plate is provided on the upper part and / or the bottom part of the inner cylinder (5), and the sealing plate is used to prevent the flue gas from directly passing through the inner cylinder (5) and reacting with the absorbent.

3. The high-efficiency cyclone tray suitable for a ship exhaust gas scrubber according to claim 1, characterized in that: The diameter of the outer cylinder (8) is 400 mm-800 mm, and the diameter of the inner cylinder (5) is 30 mm-60 mm.

4. The high-efficiency cyclone tray suitable for a ship exhaust gas scrubber according to claim 1, characterized in that: The diameter of the circular holes of the annular tube (7) is 6 mm to 12 mm, and the distance between the circular holes is 80 mm to 120 mm.

5. The high-efficiency cyclone tray suitable for a ship exhaust gas scrubber according to claim 1, characterized in that: The number of swirl components (2) is no less than 5.

6. A ship exhaust gas scrubbing system, characterized in that: It comprises a cyclone tray (9) as described in any one of claims 1 to 5.

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