CN113134291B - L-shaped flue gas side inlet device for ship flue gas desulfurization tower - Google Patents
L-shaped flue gas side inlet device for ship flue gas desulfurization towerInfo
- Publication number
- CN113134291B CN113134291B CN202110564514.XA CN202110564514A CN113134291B CN 113134291 B CN113134291 B CN 113134291B CN 202110564514 A CN202110564514 A CN 202110564514A CN 113134291 B CN113134291 B CN 113134291B
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- air inlet
- flue gas
- umbrella cap
- shaped
- inlet device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a novel air inlet structure for a ship tail gas desulfurization tower, namely an L-shaped flue gas side air inlet device, which comprises an L-shaped flue gas side air inlet device positioned at the bottom of a desulfurization tower (6), wherein an air inlet (1) is arranged on the side surface of the air inlet device, the air inlet (1) is connected with an air inlet channel (2), an annular flue is arranged in the device, a primary umbrella cap (4) and a secondary umbrella cap (5) are arranged above the annular flue, the primary umbrella cap (4) and the secondary umbrella cap (5) are respectively communicated with the inside of the desulfurization tower, and the bottom of the air inlet device is a water outlet (3). The invention is arranged at the bottom of the desulfurizing tower, the air inlet is arranged on the side surface of the air inlet device, the exhaust pipeline of the engine is directly communicated to the desulfurizing tower through the air inlet, and high-temperature and high-speed flue gas exhausted by the engine can be cooled and slowed down after passing through the L-shaped side air inlet device with special flow field simulation design, and finally enters a spraying reaction zone in desulfurization at a certain temperature and stable flow rate.
Description
Technical Field
The invention relates to an L-shaped flue gas side air inlet device for a ship flue gas desulfurization treatment tower, and belongs to the technical field of flue gas desulfurization cleaning systems for ships.
Background
The ship flue gas desulfurization treatment tower is communicated with a ship engine flue gas pipeline mainly through an air inlet device on the desulfurization tower, the design of the air inlet device is required to meet two requirements, the ship flue gas desulfurization treatment tower can be conveniently communicated with an engine flue gas exhaust pipe, and the ship flue gas desulfurization treatment tower is required to realize the cooling and speed reducing effects on flue gas. As the flue gas exhausted by the engine is the mixed gas with high temperature and high flow speed, when the flue gas is required to be desulfurized through the full neutralization reaction with the alkaline spray liquid in the desulfurizing tower, the flue gas needs to flow into the neutralization reaction area in the desulfurizing tower at a certain temperature and speed, and therefore, the cooling and speed reduction processes of the flue gas need to be completed when the flue gas passes through the air inlet device.
Disclosure of Invention
The invention aims to solve the technical problem of providing an L-shaped flue gas side inlet device for a ship flue gas desulfurization treatment tower.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention provides an L-shaped flue gas side air inlet device for a ship flue gas desulfurization tower, which comprises an L-shaped flue gas side air inlet device, wherein the L-shaped flue gas side air inlet device is positioned at the bottom of a desulfurization tower (6), an air inlet (1) is arranged on the side surface of the air inlet device, the air inlet (1) is connected with an air inlet channel (2), the air inlet channel (2) is an annular flue (9), a primary umbrella cap (4) and a secondary umbrella cap (5) are arranged above the air inlet channel (2), the primary umbrella cap (4) and the secondary umbrella cap (5) are respectively communicated with the inside of the desulfurization tower (6), and the bottom of the air inlet device is a water outlet (3).
The upper part of the desulfurizing tower (6) is provided with a spraying device (7) for spraying alkaline spraying liquid, and the space inside the inner wall of the annular flue (9) of the air inlet channel (2) is a region in which the two-stage umbrella caps are communicated with the inside of the desulfurizing tower and is also a region in which waste water after the spraying liquid reacts with flue gas flows out of the desulfurizing tower. The inner wall space can be used for separating waste water from a smoke inlet and preventing the waste water from flowing back into a smoke pipeline of the engine.
Through the L-shaped side inlet device, high-temperature and high-speed flue gas exhausted by the engine is annularly and uniformly distributed and flows upwards through the annular flue, and enters the desulfurizing tower at a certain temperature and speed after passing through the two-stage umbrella caps. The alkaline spray liquid falls from the upper part of the desulfurizing tower, contacts and neutralizes the flue gas flowing in the desulfurizing tower through the umbrella cap, and the reacted waste water flows away from the water outlet at the lower part of the inner wall space.
Analysis and comparison of the present invention with the prior art:
The existing air inlet device mainly comprises an I-shaped air inlet device (shown in figure 2) and a U-shaped air inlet device (shown in figure 3), wherein the I-shaped air inlet device is arranged at the bottom of the desulfurizing tower, an air inlet is arranged at the lower part, an engine exhaust pipeline is directly communicated with the desulfurizing tower from the lower part, the design and arrangement structure is compact, and the occupied ship space is small during installation. Because of the direct through communication, no bend exists, and the back pressure resistance of the pipeline on the engine is small. The alkaline spray liquid falls in a mist form from the upper part of the desulfurizing tower and contacts with the flue gas flowing upwards to carry out neutralization reaction, and sulfur in the flue gas is taken away by the spray liquid to form acidic wastewater as a result of the neutralization reaction, and the wastewater flows away from a water outlet on the side surface of the air inlet device. The I-type air inlet device achieves the speed reducing effect through the air inlet channel and the two-stage umbrella caps. The cooling of the flue gas is achieved by heat exchange between the two-stage umbrella caps and the spray liquid, heat is transferred to the umbrella caps when high-temperature flue gas flows through the umbrella caps, and the spray liquid absorbs and takes away the heat when scattered on the umbrella caps, so that the purpose of cooling the flue gas is achieved. The I-type air inlet device is characterized in that the engine smoke exhaust pipe is required to be directly communicated with the desulfurizing tower from the lower part, and the size of the desulfurizing tower is generally larger than that of the ship chimney, so that the desulfurizing tower for installing the I-type air inlet device is required to dismantle and rebuild the ship chimney on a large scale, and the reconstruction workload of the ship is relatively large.
The U-shaped air inlet device is provided with an external vertical cooling pipeline which is positioned at the side part of the desulfurizing tower and forms an appearance similar to a letter U with the desulfurizing tower, and the cooling pipeline is mainly used for cooling and reducing the speed of flue gas. The lower part of the cooling pipeline is communicated with the side lower part of the desulfurizing tower, the upper part of the cooling pipeline is communicated with the flue gas pipeline, and a cooling spray device (8) is arranged in the cooling pipeline. The flue gas enters from the upper part of the cooling pipeline, the temperature is reduced after pre-cooling and spraying, then the flue gas flows downwards through the cooling pipeline to gradually slow down, then enters from the side lower part of the desulfurizing tower, and finally flows out from the outlet at the upper part of the desulfurizing tower. In the whole process, the smoke needs to flow downwards and then flow upwards, and a relatively large smoke back pressure resistance is caused to the engine. The desulfurizing tower with the U-shaped air inlet device can be designed and arranged outside a ship chimney because of the existence of an external cooling pipeline, and the flue pipe is led out and communicated to the inlet of the cooling pipeline after the side surface of the chimney is simply perforated, so the desulfurizing tower adopting the U-shaped air inlet device is relatively easy to design and arrange, and the defect that a part of space except the ship chimney is occupied is overcome.
The two air inlet devices have advantages and disadvantages, the I-type air inlet device has the advantages of compact structure, small occupied space, small back pressure resistance of a flue gas pipeline and contribution to the flow of the flue gas, but the expansion reconstruction of a ship chimney is needed, and the workload of the ship reconstruction is large. The U-shaped air inlet device has the advantages that the smoke exhaust pipe can be led out from the smoke tube of the ship to be connected to the desulfurizing tower, so that the desulfurizing tower can be arranged in a relatively free area on the ship without being limited by the space in the smoke tube, the whole size of the desulfurizing tower is relatively large, a large ship space is occupied, and because of a cooling pipeline, the smoke needs to be changed in a plurality of large angles when passing through, the back pressure resistance of the engine smoke is relatively large, and the flow of the smoke is not facilitated.
Although the technology of the U-shaped air inlet device and the I-shaped air inlet device on the existing ship tail gas desulfurization tower products is relatively mature through years of development, the prominent defects of the two structural forms still plagues manufacturers and shipmen of the desulfurization towers, and if a new air inlet type desulfurization tower can be adopted, the defects or partial defects of the two air inlet devices can be avoided, namely, the air inlet form of the desulfurization tower with small occupied space of the ship, small back pressure resistance of the flue gas and easy installation and arrangement can be solved, so that more and better alternative schemes are provided for the design and arrangement of the desulfurization tower for cleaning the ship tail gas.
The invention has the beneficial effects that the L-shaped side air inlet device can be connected to the desulfurizing tower from the side without a cooling pipeline of the U-shaped air inlet device, so that the L-shaped side air inlet device can be arranged in an area outside a chimney of a ship, but the occupied space is smaller than that of the desulfurizing tower of the U-shaped air inlet device. The L-shaped side air inlet device redesigns the middle two-stage umbrella cap adopted by the original I type into an inward-inclined annular two-stage umbrella cap by using computer flow field simulation design software, so that the smoke after flowing out of the umbrella cap is diffused from annular rising to peripheral rising. The redesigned umbrella cap structure reduces the escape phenomenon caused by uneven smoke in the ascending diffusion process, increases the contact area of the smoke and the spray liquid, and improves the neutralization reaction efficiency. The L-shaped side air inlet device is provided with only one bend, the smoke flow is relatively smooth, and the back pressure resistance of the smoke of the engine is relatively small.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 is a block diagram of an L-shaped flue gas side air intake device of the present invention.
Fig. 2 is a structural view of an I-type air intake device according to the related art.
Fig. 3 is a structural view of a U-shaped air intake device according to the prior art.
Fig. 4 is a physical structure diagram of the L-shaped flue gas side air intake device.
In the accompanying drawings:
1 air inlet, 2 air inlet, 3 water outlet, 4 first-stage umbrella cap, 5 second-stage umbrella cap, 6 desulfurizing tower, 7 spray device, 8 cooling spray device and 9 annular flue.
In fig. 1-3, the solid arrows indicate spray liquid flow direction and the open arrows indicate flue gas flow direction.
Detailed Description
Example 1
The embodiment provides an L type flue gas side air inlet unit for on boats and ships flue gas desulfurization processing tower, includes L type flue gas side air inlet unit is located the bottom of desulfurizing tower (6), is equipped with air inlet (1) in air inlet unit's side, and air inlet (1) are connected with intake duct (2), and intake duct (2) are inside to be annular flue, set up one-level umbrella cap (4) and second grade umbrella cap (5) in intake duct (2) top, one-level umbrella cap (4) and second grade umbrella cap (5) communicate with desulfurizing tower is inside respectively, and air inlet unit bottom is outlet (3).
The upper part of the desulfurizing tower (6) is provided with a spraying device (7) for spraying alkaline spraying liquid, and the space inside the inner wall of the annular flue of the device is a region in which the two-stage umbrella caps are communicated with the inside of the desulfurizing tower and is also a region in which wastewater after neutralization reaction of the spraying liquid flows out of the desulfurizing tower. The inner wall space can be used for separating waste water from a smoke inlet and preventing the waste water from flowing back into a smoke pipeline of the engine.
Specifically, the L-shaped flue gas side air inlet device is positioned at the bottom of the desulfurizing tower, and an air inlet is arranged on the side surface of the air inlet device. The inside of the air inlet device is an annular flue and an inner wall space, a first-stage umbrella cap and a second-stage umbrella cap are arranged above the annular flue, the first-stage umbrella cap and the second-stage umbrella cap are communicated with the inside of the desulfurizing tower, and a drain hole is arranged at the lower part of the inner wall space. The specific working process of the L-shaped smoke side air inlet device is that firstly, an engine smoke exhaust pipeline is directly communicated with an air inlet of the air inlet device, and smoke enters an annular flue through the air inlet. The flue gas is initially slowed down in the annular flue and is annularly distributed and lifted, after the flue gas reaches the first-stage umbrella cap, a part of flue gas flows in an s shape at the first-stage umbrella cap to be slowed down, heat is transferred to the umbrella cap, the umbrella cap takes away the heat through spraying liquid sprayed on the umbrella cap, and after the flue gas finally flows into the desulfurizing tower. The residual flue gas continuously rises to reach the second-level umbrella cap, and flows into the desulfurizing tower after the same speed reduction and temperature reduction process as the first-level umbrella cap. After passing through the two-stage umbrella caps, the flow speed and the temperature of the flue gas reach the state suitable for contacting with alkaline spray liquid and carrying out neutralization desulfurization reaction, and the flue gas uniformly rises and diffuses from the middle part to the periphery and inwards to the desulfurization tower through the upper parts of the umbrella caps, thereby being beneficial to improving the desulfurization efficiency and effect. The alkaline spray liquid is sprayed and falls on the upper part of the desulfurizing tower in a mist form uniformly, contacts with the rising flue gas to perform neutralization reaction, and acidic wastewater generated after the neutralization reaction flows out through a water outlet in the middle of the lower part of the desulfurizing tower. The flue gas after desulfurization treatment accords with the relevant emission standard, and is discharged into the atmosphere from an outlet at the top of the desulfurizing tower.
Fig. 1, fig. 2 and fig. 3 show scheme diagrams of desulfurizing towers of different air inlet devices under the same design working condition, the occupied space is I type > L type > U type sequentially from low to high, the difficulty of equipment installation is L type > U type > I type sequentially from easy to difficult, and the back pressure resistance to engine smoke is I type > L type > U type sequentially from small to large. Therefore, the L-shaped side inlet device has obvious comprehensive advantages, namely the advantages of I type and U type are compatible, and breakthrough is made. The L-shaped side air inlet device scheme is realized, so that a choice is further provided for manufacturers and shipowners of the desulfurizing tower.
By comparing the technical structural characteristics of the document figures 1-3, it can be seen that the L-shaped air inlet device is arranged at the bottom of the desulfurizing tower, the air inlet is arranged on the side surface of the air inlet device, and the exhaust pipeline of the engine is directly communicated to the desulfurizing tower through the air inlet. After the high-temperature and high-speed flue gas exhausted by the engine passes through the L-shaped side air inlet device with a special flow field simulation design, the temperature reduction and the speed reduction can be realized, and finally the flue gas enters a spraying reaction zone in desulfurization at a certain temperature and a stable flow rate. The desulfurizing tower that installation L type side was admitted air can design the region of installing outside boats and ships chimney, and the exhaust pipe of engine need not pass through external cooling pipeline like on the U type air inlet unit, also need not dismantle the extension on a large scale like I type air inlet unit with the chimney and reform transform in order to satisfy the condition of installation, but follow the simple trompil on the boats and ships chimney and draw forth the exhaust pipe to on the L type air inlet unit. Therefore, the L-shaped air inlet device occupies space on the ship better than the U-shaped air inlet device, is easier to design, arrange and realize than the I-shaped air inlet device, has only one large-angle reversing bend, has smoother flue gas flow and has lower flue gas back pressure resistance to the engine.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that various changes, modifications, additions and substitutions can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110564514.XA CN113134291B (en) | 2021-05-24 | 2021-05-24 | L-shaped flue gas side inlet device for ship flue gas desulfurization tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110564514.XA CN113134291B (en) | 2021-05-24 | 2021-05-24 | L-shaped flue gas side inlet device for ship flue gas desulfurization tower |
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| CN113134291A CN113134291A (en) | 2021-07-20 |
| CN113134291B true CN113134291B (en) | 2025-09-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204220015U (en) * | 2014-11-14 | 2015-03-25 | 河北宇清环保设备有限公司 | A kind of desulfurizing tower deduster |
| CN206276217U (en) * | 2016-11-10 | 2017-06-27 | 盱眙绿环水处理有限公司 | A kind of ladder shunting spray column |
| CN216024050U (en) * | 2021-05-24 | 2022-03-15 | 海德威科技集团(青岛)有限公司 | A L type flue gas side is advanced gas device for on boats and ships flue gas desulfurization treatment tower |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07102300B2 (en) * | 1989-02-07 | 1995-11-08 | 宇部興産株式会社 | Gas absorption tower |
| KR101108932B1 (en) * | 2010-01-08 | 2012-01-31 | (주)현보산업 | Pollutant Purifier |
| CN202983506U (en) * | 2012-12-18 | 2013-06-12 | 北京威肯众合环保科技有限公司 | Oil furnace smoke purification combined tower integrating dust collection, smoke elimination and desulfurization |
| CN205252881U (en) * | 2015-12-29 | 2016-05-25 | 杨文瑞 | Chimney exhaust recovery device |
-
2021
- 2021-05-24 CN CN202110564514.XA patent/CN113134291B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204220015U (en) * | 2014-11-14 | 2015-03-25 | 河北宇清环保设备有限公司 | A kind of desulfurizing tower deduster |
| CN206276217U (en) * | 2016-11-10 | 2017-06-27 | 盱眙绿环水处理有限公司 | A kind of ladder shunting spray column |
| CN216024050U (en) * | 2021-05-24 | 2022-03-15 | 海德威科技集团(青岛)有限公司 | A L type flue gas side is advanced gas device for on boats and ships flue gas desulfurization treatment tower |
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| CN113134291A (en) | 2021-07-20 |
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