CN110975547A

CN110975547A - High-efficient whirl tower tray suitable for boats and ships exhaust gas scrubbing tower

Info

Publication number: CN110975547A
Application number: CN201911368681.6A
Authority: CN
Inventors: 王德智; 郑浣琪; 沈海涛; 王汝能; 王兴如; 沈敏强; 余国成; 仲亚; 汪成
Original assignee: Zhejiang Zheneng Mailing Environmental Technology Co Ltd
Current assignee: Zhejiang Zheneng Mailing Environmental Technology Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-10
Also published as: WO2021128495A1

Abstract

The invention discloses a high-efficiency cyclone tower tray suitable for a ship exhaust gas washing tower, which comprises a connecting plate and a plurality of cyclone assemblies arranged on the connecting plate; wherein, a plurality of through holes are arranged on the connecting plate, the rotational flow component comprises an outer cylinder, an inner cylinder and rotational flow blades arranged on the outer peripheral wall of the inner cylinder, and the bottom of the outer cylinder is provided with a drainage inlet for the absorbent to pass through. The cyclone assembly comprises a peripheral cyclone assembly arranged on the inner peripheral wall of the cyclone tray and an internal cyclone assembly close to the center of the cyclone tray, a drainage assembly for an absorbent to pass through is arranged on the peripheral cyclone assembly, the drainage assembly comprises a drainage tube and an annular tube arranged on the inner wall of an outer tube, one end of the drainage tube is arranged on the outer side of the outer tube and extends outwards, and the other end of the drainage tube is communicated with the annular tube. One side of the annular pipe close to the rotational flow blades is provided with a plurality of round holes. The absorbent is crushed into tiny liquid drops by the cyclone effect of the cyclone assembly, the tiny liquid drops fully react with the flue gas, the flue gas escaping from the peripheral area is effectively captured, and the flue gas desulfurization efficiency is improved.

Description

High-efficient whirl tower tray suitable for boats and ships exhaust gas scrubbing tower

Technical Field

The invention relates to the field of desulfurization environmental protection equipment, in particular to a washing tower device for ship waste gas treatment.

Background

With the stricter environmental protection policy of China, most of tail gas for ships needs to be subjected to desulfurization treatment. The ship desulfurization technology mainly absorbs the polluted gas through a washing tower. The main working principle is as follows: the flue gas enters the washing tower to react with the sprayed absorbent, harmful gas and particles contained in the flue gas are absorbed by the absorbent, and the flue gas is discharged to the atmosphere through the demister after being purified to reach the standard. Therefore, the purification effect of the washing tower is directly related to whether the whole set of desulfurization equipment reaches the standard or not.

Most of the washing towers used at present are spray towers, packed towers, sieve plate towers and the like. Most of the tower is a packed tower, the packed tower is simple in structure, but the packing is easy to block, the loss of the packing is large during cleaning and maintenance, and the blocking probability is greatly increased under the dry-burning working condition. The pressure drop of the tray column is large and the operational flexibility is small, and the operation is often difficult to regulate. The main purification function of the spray tower depends too much on the performance of the nozzles, and smaller nozzles are usually needed to achieve better atomization, increasing the risk of nozzle blockage. Generally, the absorption efficiency of the scrubber is mainly related to the reaction time of the flue gas and the absorbent, the contact area of the flue gas and the absorbent, and the pressure loss of the flue gas, and the absorption efficiency of the existing scrubber is still to be improved.

Disclosure of Invention

Aiming at mainly solving the problem of poor mixing effect of alkali liquor and an absorbent in the existing waste gas desulfurization treatment device, the invention provides the high-efficiency cyclone tower tray suitable for the ship waste gas washing tower, which has the aim of desulfurization treatment of tail gas for ships.

In order to solve the technical problems, the invention adopts the following technical scheme:

a high-efficiency cyclone tower tray suitable for a ship exhaust gas washing tower comprises a connecting plate and a plurality of cyclone assemblies arranged on the connecting plate; wherein, a plurality of through holes are arranged on the connecting plate, the rotational flow component comprises an outer cylinder, an inner cylinder and rotational flow blades arranged on the outer peripheral wall of the inner cylinder, and the bottom of the outer cylinder is provided with a drainage inlet for the absorbent to pass through.

Optionally, the connecting plate is provided with mounting holes matched with the cyclone assemblies, the plurality of cyclone assemblies are symmetrically arranged on the connecting plate, and each cyclone assembly comprises a peripheral cyclone assembly arranged on the inner peripheral wall of the cyclone tray and an internal cyclone assembly close to the center of the cyclone tray.

Optionally, a drainage assembly for an absorbent to pass through is arranged on the peripheral rotational flow assembly, the drainage assembly comprises a drainage tube and an annular tube arranged on the inner wall of the outer barrel, one end of the drainage tube is arranged on the outer side of the outer barrel and extends outwards, and the other end of the drainage tube is communicated with the annular tube.

Optionally, one side of the annular pipe close to the swirl vanes is provided with a plurality of round holes, the round holes are arranged on the inner circumferential wall of the annular pipe and are spaced from each other along the circumferential direction of the annular pipe, and the lower end of the annular pipe is provided with a drain hole.

Optionally, the swirl vane further comprises a plurality of vanes spaced from each other in a circumferential direction of the inner cylinder, wherein the vanes comprise a vane body, a bent portion, wherein an inner end of the vane body is connected to an outer circumferential wall of the inner cylinder, an inner end of the bent portion is connected to a tip of the vane body, and a middle section of the vane body is bent by an angle of 5 to 15 °.

Optionally, a sealing plate is arranged at the upper part and/or the bottom of the inner barrel and is used for preventing the flue gas from directly passing through the inner barrel to react with the absorbent.

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

Optionally, the circular holes of the annular tube have a diameter of 6-12mm and a pitch of 80-120 mm.

Optionally, the number of cyclone assemblies is no less than 5.

According to another aspect of the invention, the high efficiency cyclone tray is used in a marine exhaust gas scrubbing system.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

1. by arranging the cyclone tower tray, a plurality of whirlwind with the same cyclone direction is formed when the flue gas passes through the tower tray, the retention time of the flue gas in the washing tower is prolonged, the reaction time of the flue gas and the absorbent is longer, and the flue gas purification effect is improved.

2. The sprayed absorbent is broken into smaller fog drops by cyclone tearing of the cyclone tower tray, so that the contact area of the flue gas and the absorbent is increased, and the desulfurization efficiency of the waste gas is improved.

3. The pressure drop of the flue gas passing through the cyclone tower tray is smaller. In the washing tower with the same tower diameter, the flow velocity of the flue gas passing through the cyclone tower is higher than that of the packed tower, and the higher the flow velocity is, the more obvious the cyclone effect of the flue gas passing through the tower tray is. Under the same flue gas purification effect, the height of the body of the cyclone tower can be properly reduced, so that the manufacturing cost of the washing tower is reduced, the engineering installation and maintenance are more convenient, and particularly, the height of the washing tower can be reduced by using the cyclone tower tray structure due to the limited structural space of a ship, the weight of the washing tower is reduced, and the influence of the weight of the washing tower on the navigation safety of the ship body is reduced.

4. Flue gas is under the high low velocity of flow, and the homoenergetic effectively reacts, compares packed tower, can not take place the flood on the tray, and the design factor of safety of tower is little, in the absorbent composition moreover, even there is the great suspended solid of granule, can not take place the danger that the tray blockked up yet. For the working condition of dry burning, the cyclone tower tray can well operate, and the system operates more safely and reliably.

5. The cyclone tower tray is composed of each cyclone assembly and a connecting plate, is simple to install and convenient to maintain, and reduces the cost of engineering installation and maintenance.

6. The blade interlude is bent and is formed certain angle, through the angle of bending, not only can adjust the resistance loss of flue gas, and the absorbent that erodees down simultaneously also can cushion on the tower tray, increases the reaction time of absorbent and flue gas. The blade tail end folded plate type can effectively reduce the escape of the smoke around the blade and enhance the cyclone effect of the smoke.

Drawings

FIG. 1 is a schematic diagram of the overall configuration of one embodiment of a high efficiency cyclone tray suitable for use in a marine exhaust gas scrubbing tower;

FIG. 2 is a block diagram of a swirler assembly in an embodiment;

FIG. 3 is a schematic view of the swirl vanes of an embodiment of a high efficiency swirl tray suitable for use in a marine exhaust gas scrubbing tower;

FIG. 4 is a schematic illustration of a cyclone tray installation of an embodiment of a high efficiency cyclone tray suitable for use in a marine exhaust gas scrubbing tower.

The reference numbers in the figures illustrate:

1-connecting plate, 2-cyclone component, 3-drainage tube, 4-drainage inlet, 5-inner cylinder, 6-cyclone blade, 7-annular tube, 8-outer cylinder, 9-cyclone tray, 10-spraying layer, 11-washing tower and 12-demister.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

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

As shown in fig. 1, to solve the above problem, an embodiment of the present invention provides a high-efficiency cyclone tray suitable for a ship exhaust gas washing tower, which is applied in a ship exhaust gas washing system, and the cyclone assembly 2 is arranged to enable flue gas and an absorbent to better react, thereby improving desulfurization efficiency.

Specifically, this high-efficient whirl tray includes connecting plate 1 at least and arranges a plurality of whirl subassemblies 2 on connecting plate 1 in, sets up a plurality of through-holes on the connecting plate 1, and the flue gas passes through the through-hole can react with the lower liquid layer that holds on the tray, has reduced the pressure drop of whole tray as far as when guaranteeing desulfurization efficiency, and the through-hole shape can be square hole or round hole. Reserve the mounting hole of whirl subassembly 2 on the connecting plate, a plurality of whirl subassemblies 2 symmetries are installed on connecting plate 1.

Wherein, whirl subassembly 2 includes urceolus 8, inner tube 5 and establishes the whirl blade 6 on the outer peripheral wall of

inner tube

5, and 8 bottoms in the urceolus are equipped with the drainage entry 4 that supplies the absorbent to pass through. One part of the smoke passing through the cyclone tower tray 9 passes through the through holes on the connecting plate 1 upwards, the other part of the smoke passes through the cyclone assembly 2 to form a plurality of strands of cyclones in the same direction, the smoke passing through the cyclone tower tray and the sprayed absorbent are fully contacted and reacted, and the purified smoke is finally discharged to the atmosphere through the demister 12.

Optionally, the cyclone assembly 2 includes a peripheral cyclone assembly disposed on the inner peripheral wall of the cyclone tray 9 and an inner cyclone assembly proximate the center of the cyclone tray 9. The peripheral rotational flow component is provided with a drainage component for absorbent to pass through, the drainage component comprises a drainage tube 3 and an annular tube 7 arranged on the inner wall of the outer barrel 8, one end of the drainage tube 3 is arranged on the outer side of the outer barrel 8 and extends outwards, and the other end of the drainage tube is communicated with the annular tube 7. In particular, the spray density of the peripheral region is relatively low compared to the central region of the cyclone tray 9, and therefore the likelihood of flue gas escaping from the peripheral region is greater. By providing a draft tube 3, a portion of the absorbent is introduced into the peripheral cyclone assembly.

More specifically, the annular tube 7 is opened at a side close to the swirl vanes 6 with a plurality of circular holes provided on the inner circumferential wall of the annular tube 7 and spaced apart from each other in the circumferential direction of the annular tube 7. By introducing the absorbent into the peripheral cyclone assembly, the actual spraying absorbent density in the peripheral area of the cyclone tray 9 is increased, and the absorbent is damaged into tiny liquid drops by the cyclone effect of the cyclone assembly 2 to fully react with the flue gas. Thereby effectively trapping the flue gas escaping from the peripheral area and improving the desulfurization efficiency of the flue gas.

In addition, the swirl vane 6 further includes a plurality of vanes spaced from each other in the circumferential direction of the inner cylinder 5, wherein the vanes include a vane body, a bent portion, wherein an inner end of the vane body is connected to the outer circumferential wall of the inner cylinder 5, an inner end of the bent portion is connected to a tip of the vane body, and an intermediate section of the vane body is bent to form 5 to 15 °. When the swirl vanes 6 are installed, the included angle between the vanes and the horizontal direction is about 45 degrees, the height of the vanes is about 60-100mm, and the angle formed by bending the middle sections of the vanes is about 10 degrees. Through the angle of bend, not only can adjust the resistance loss of flue gas, the absorbent that washes down simultaneously also can cushion on the tray, increases the reaction time of absorbent and flue gas. The escape of the flue gas around the blades can be effectively reduced by the form of the blade tail end folded plate, the cyclone effect of the flue gas is enhanced, and the number of the blades is not less than 8.

In addition, the upper part and/or the bottom of the inner cylinder 5 are/is provided with sealing plates which are used for preventing the flue gas from directly passing through the inner cylinder 5 to react with the absorbent.

In this embodiment, the size of the outer cylinder 8 is about 400-800 mm; on the premise of ensuring the installation and manufacture, the inner cylinder 5 needs to be as small as possible, generally about 50mm, in order to improve the cyclone effect. According to the difference of tower footpath, whirl subassembly 2 adopts central symmetry mode to arrange, and whirl subassembly 2 quantity is no less than 5.

It is noted that the annular tube 7 is provided with circular holes having a diameter of 6-12mm to ensure that the absorbent does not clog in the holes, the pitch of the holes being about 100 mm. In addition, the round hole is obliquely opened at an angle of 45 degrees, so that the phenomenon that the absorbent is difficult to flow and block the round hole under the condition of no pressure is prevented.

The working principle and the using process of the invention are as follows: flue gas enters from the bottom of the washing tower 11 and passes through a cyclone tower tray 9 inside the cyclone tower tray, and the cyclone tower tray 9 comprises a connecting plate 1, a cyclone component 2 and a drainage component. Wherein, the connecting plate 1 is provided with a through hole, and the aperture ratio of the connecting plate 1 is determined according to the pressure loss of the flue gas and the design consideration; reserve the mounting hole of whirl subassembly 2 on the connecting plate 1, a plurality of whirl subassemblies 2 symmetry are installed on connecting plate 1. One part of the smoke passing through the cyclone tower tray 9 passes through the through holes on the connecting plate 1 upwards, the other part of the smoke passes through the cyclone assembly 2 to form a plurality of strands of cyclones in the same direction, the smoke which flows upwards in the cyclone tower tray is fully contacted with the sprayed absorbent and reacts, and the purified smoke is finally discharged to the atmosphere through the demister 12. Meanwhile, the absorbent is sprayed into the peripheral cyclone assembly through the round holes, the actual spraying absorbent density of the peripheral area of the cyclone tray 9 is increased, and the absorbent is damaged into tiny liquid drops by the cyclone effect of the cyclone assembly 2 to fully react with the flue gas. Thereby effectively trapping the flue gas escaping from the peripheral area and improving the desulfurization efficiency of the flue gas. The 8 bottoms of urceolus still are equipped with the drainage entry 4 that supplies the absorbent to pass through, and drainage entry 4 is regular semicircle orifice for the absorption liquid of detaining on connecting plate 1 can enter into whirl subassembly 2 under the drainage effect through the aperture, reacts once more with the flue gas.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

It should be noted that:

while preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes in the structure, characteristics and principles of the inventive concept are included in the scope of protection of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A high-efficiency cyclone tray suitable for a marine exhaust gas scrubbing tower, comprising at least:

the device comprises a connecting plate (1) and a plurality of cyclone assemblies (2) arranged on the connecting plate (1);

wherein, a plurality of through holes are arranged on the connecting plate (1), the rotational flow component (2) comprises an outer cylinder (8), an inner cylinder (5) and rotational flow blades (6) arranged on the outer peripheral wall of the inner cylinder (5), and the bottom of the outer cylinder (8) is provided with a drainage inlet (4) for the absorbent to pass through.

2. The efficient cyclone tray suitable for the ship exhaust gas washing tower is characterized in that mounting holes matched with the cyclone assemblies (2) are formed in the connecting plate (1), the cyclone assemblies (2) are symmetrically arranged on the connecting plate (1), and each cyclone assembly (2) comprises a peripheral cyclone assembly arranged on the inner peripheral wall of the cyclone tray (9) and an internal cyclone assembly close to the center of the cyclone tray (9).

3. The efficient cyclone tray suitable for the ship exhaust gas washing tower according to claim 2, wherein the peripheral cyclone assembly is provided with a drainage assembly for an absorbent to pass through, the drainage assembly comprises a drainage tube (3) and a ring-shaped tube (7) arranged on the inner wall of the outer cylinder (8), one end of the drainage tube (3) is arranged on the outer side of the outer cylinder (8) and extends outwards, and the other end of the drainage tube is communicated with the ring-shaped tube (7).

4. The high-efficiency cyclone tray suitable for the ship exhaust gas washing tower according to claim 3, wherein a plurality of round holes are formed in one side of the annular pipe (7) close to the cyclone blades (6), the round holes are formed in the inner peripheral wall of the annular pipe (7) and are spaced from each other along the circumferential direction of the annular pipe (7), and a drain hole is formed in the lower end of the annular pipe (7).

5. The high efficiency cyclone tray suitable for a marine vessel exhaust gas scrubbing tower according to claim 1, wherein the cyclone blade (6) further comprises a plurality of blades spaced from each other in a circumferential direction of the inner tube (5), wherein the blades comprise a blade body, a bent portion, an inner end of the blade body is connected to an outer circumferential wall of the inner tube (5), an inner end of the bent portion is connected to a distal end of the blade body, and a middle section of the blade body is bent at an angle of 5 ° to 15 °.

6. The high-efficiency cyclone tray suitable for the ship exhaust gas washing tower is characterized in that sealing plates are arranged at the upper part and/or the bottom part of the inner cylinder (5) and are used for preventing flue gas from directly reacting with an absorbent through the inner cylinder (5).

7. The high-efficiency cyclone tray suitable for the marine exhaust gas washing tower according to claim 1, wherein the diameter of the outer cylinder (8) is 400mm-800mm, and the diameter of the inner cylinder (5) is 30mm-60 mm.

8. The high-efficiency cyclone tray suitable for the ship exhaust gas washing tower according to claim 1, wherein the diameter of the circular holes of the annular pipe (7) is 6mm-12mm, and the distance between the circular holes is 80mm-120 mm.

9. A high efficiency cyclone tray suitable for use in a marine vessel exhaust gas scrubbing tower as claimed in claim 1, wherein the number of cyclone assemblies (2) is not less than 5.

10. A marine exhaust gas scrubbing system comprising a cyclone tray (9) according to any one of claims 1-9.