WO2021128496A1 - Cross-flow composite tray suitable for ship exhaust gas washing column - Google Patents
Cross-flow composite tray suitable for ship exhaust gas washing column Download PDFInfo
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- WO2021128496A1 WO2021128496A1 PCT/CN2020/071280 CN2020071280W WO2021128496A1 WO 2021128496 A1 WO2021128496 A1 WO 2021128496A1 CN 2020071280 W CN2020071280 W CN 2020071280W WO 2021128496 A1 WO2021128496 A1 WO 2021128496A1
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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
- B01D53/50—Sulfur oxides
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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
- B01D53/78—Liquid phase processes with gas-liquid contact
Definitions
- the invention relates to the field of ship waste gas desulfurization, in particular to a composite tray for ship waste gas desulfurization.
- the mainstream tower type in the ship exhaust gas desulfurization device is a packed tower, and an empty tower spray + tray configuration can also be used.
- the packing height of the packed tower is generally set at about 1m, and metal plate corrugated packing is usually used, which can be arranged in one or more layers.
- Each layer of packing is equipped with a spray layer, and the spray layer generally has fewer nozzles.
- the packed tower can obtain a lower liquid-to-gas ratio, it is usually designed to have a lower gas flow rate, resulting in a larger diameter of the tower.
- each packing layer is usually stacked by one or more packing modules.
- the packing module is installed with an interference fit.
- the packing module is inconvenient to disassemble and assemble, and the packing surface is easily damaged during disassembly and assembly.
- the advantage of using the empty tower spray + tray method is that it can reduce the maintenance of the scrubber, but the tray should be selected appropriately to run at a high flow rate without causing flooding of the tower. Due to the limit of the installation height, the tower The number of trays should be as small as possible and have a certain degree of flexibility in operation to meet the frequent load changes of the ship.
- the purpose of the present invention is to provide a new type of composite tray with reasonable structure and convenient implementation, which can meet the desulfurization efficiency of the scrubber and basically does not require maintenance in view of some of the problems existing in the current ship exhaust gas scrubber.
- This technical solution provides a through-flow composite tray suitable for a ship's exhaust gas scrubber, which is placed in the scrubber body, and at least includes:
- the uniform sieve layer, the packing unit layer and the broken wall flow circle are laid sequentially from bottom to top.
- the uniform sieve layer is provided with uniform holes, and the liquid film is laid on the uniform sieve layer.
- the packing unit layer includes In the packing module, the wall-broken flow ring is a circular ring.
- the opening ratio of the uniformly distributed holes on the uniformly distributed sieve layer is controlled between 70% and 90%, and the opening diameter of the uniformly distributed holes is controlled between 3-6 mm.
- the uniformly distributed holes are evenly arranged on the uniformly distributed screen layer.
- the opening density of the uniform holes at the periphery of the uniform screen layer is greater than the opening density of the uniform holes at the center of the uniform screen layer.
- the packing unit layer is composed of 1-2 layers of metal plate corrugated packing module groups.
- the specific surface area of the packing module should be controlled within the range of 100-200 m 2 /m 3 , and the porosity should be greater than 95%.
- the plate corrugated packing of the metal plate corrugated packing module group of the packing unit layer is designed to reserve a portion of straight sections at the upper and lower ends of the waveform.
- the wall-broken flow ring is a ring of annular plates, on which wall-broken holes are opened, and the wall of the wall-broken flow ring is inclinedly arranged on the tower wall.
- the angle of inclination of the broken wall flow ring and the tower wall is controlled between 30-50°, broken wall holes with a diameter of 10-14 mm are uniformly opened on the broken wall flow ring, and the opening rate is controlled at 30 %-40%.
- the uniformly distributed sieve plate layer, the packing unit layer, and the broken wall flow ring are all made of stainless steel materials that are resistant to corrosion by seawater and alkaline solutions.
- the tower tray design of the present invention has effectively reduced the tower height, and there is no need to set up 3-4 or more spray layers to ensure the desulfurization efficiency, usually 2 layers of trays + 2 Layer spraying can meet the desulfurization efficiency of more than 97%.
- the tray design of the present invention has a higher design flow rate, and the actual tower diameter can be reduced by about 20%, which will reduce the overall size of the scrubber. The size and materials are more economical, and at the same time it is more convenient for on-site layout and installation.
- the invention has a stainless steel structure with good component strength and high stability. After installation, the system is stable and reliable under the exhaust gas load. At the same time, there is no need to set up exhaust gas bypass, and it can be dry burned, that is, the exhaust gas can be directly passed through without spraying.
- the uniformly distributed sieve plate and the broken wall flow circle are easy to clean, and basically will not be blocked under operating conditions. Due to the low layer height of the packing unit layer, the spray can cover from top to bottom, and it is not easy to be blocked. Even if the blockage is caused by special working conditions, it is easy to flush with a water gun.
- Fig. 1 is a structural diagram of a through-flow composite tray suitable for a marine exhaust gas scrubbing tower according to an embodiment of the present invention.
- Figure 2 is a top view of the uniformly distributed sieve layer
- Figure 3 is a top view of the packing unit layer
- Figure 4 is a top view of the broken wall flow ring
- Fig. 5 is an installation method of a through-flow composite tray suitable for a marine exhaust gas scrubbing tower according to an embodiment of the present invention.
- uniformly distributed sieve plate layer 1 packing unit layer 2, broken wall flow ring 3, spray layer 4, washing tower body 5, and washing tower inlet 6.
- the term “a” should be understood as “at least one” or “one or more”, that is, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element The number can be multiple, and the term “one” cannot be understood as a restriction on the number.
- the through-flow composite tray suitable for a ship's waste gas scrubber at least includes: The uniform sieve deck layer (1), the packing unit layer (2) and the broken wall flow circle (3) laid from bottom to top in the washing tower body (5), of which the uniform sieve deck layer (1) There are uniformly distributed holes, and a liquid film is laid on the uniformly distributed sieve plate layer (1), the packing unit layer (2) includes packing modules, and the wall-broken flow ring (3) is a circular ring.
- the opening rate of the uniformly distributed holes on the uniformly distributed sieve layer (1) is controlled between 70% and 90%, which can be 80%, in order to achieve a thorough exhaust gas uniformity while ensuring more More exhaust gas passes through to improve the efficiency of uniform distribution.
- the opening rate of uniformly distributed holes is controlled at 70%.
- the aperture diameter of the uniformly distributed holes is controlled between 3-6mm, which can be 4, 5, 3.5, 4.5, etc.
- the aperture diameter of the uniformly distributed holes is preferably In order to minimize the pressure drop through the gas flow.
- uniform distribution refers to uniform distribution.
- the uniformly-distributed holes may be holes with the same aperture shape.
- the uniformly distributed holes are evenly arranged on the uniformly distributed sieve layer (1); or, the opening density of the uniformly distributed holes in the peripheral position of the uniformly distributed sieve layer (1) is greater than that of the uniformly distributed sieve The opening density of uniformly distributed holes in the center of layer (1).
- the liquid film laid on the uniformly distributed sieve plate layer (1) is prepared from the desulfurization material.
- the uniformly distributed sieve layer (1) can uniformly distribute the exhaust gas entering the tower to the greatest extent, so that the exhaust gas can evenly and the spray slurry fully contact and react, reducing the factor Insufficient gas-liquid contact or exhaust gas escape caused by uneven local flow field, and at the same time can reduce the impact of ship shaking on the flow of exhaust gas in the tower.
- the packing unit layer (2) is composed of 1-2 layers of metal plate corrugated packing modules, and the specific surface area of the packing modules should be controlled within the range of 100-200m 2 /m 3 , which can be 120, 150, 170m 2 /m 3 , the void ratio must be greater than 95% to ensure sufficient reaction area and minimum pressure drop.
- the tray design of the present invention has a higher design flow rate, and the actual tower diameter is It can be reduced by about 20%.
- the plate corrugated packing of the metal plate corrugated packing module group of the packing unit layer (2) is designed to reserve a part of straight sections at the upper and lower ends of the waveform.
- the packing unit layer (2) is arranged at a position about 0.5-1 m above the uniformly distributed sieve plate layer (1).
- the height of the packing unit layer (2) should be controlled at about 400mm to avoid flooding in the tower at high gas velocity.
- the packing unit layer should not be set too high, otherwise the design flow rate of the gas in the tower will be too small, and the tower will easily cause flooding, and the pressure drop of the overall operation will be relatively large.
- the packing type of packing unit layer (2) is selected and designed according to actual operating conditions and design flow rate.
- the wall-broken flow ring (3) is a ring plate with broken wall holes, and the wall-broken flow ring (3) is arranged obliquely on the tower wall.
- the location of the broken wall flow ring (3) should be determined according to the nozzle layout of the spray layer. It is necessary to ensure that the spray layer sprayed by the spray layer has a certain distance from the weld between the ring plate and the tower body, so that the spray slurry does not Wash directly on the broken wall flow circle (3).
- the angle of inclination of the broken wall flow ring (3) and the tower wall is controlled between 30-50°, preferably set at 45°, and the ring plate is evenly provided with diameters ranging from 10-14mm Broken hole, preferably
- the opening rate of the small holes is controlled in the range of 30%-40%, preferably 35%, to control the gas velocity through the small holes and the flow rate of the slurry.
- the uniformly distributed sieve layer (1), the packing unit layer (2), and the broken wall flow ring (3) are all made of stainless steel that can withstand corrosion by seawater and lye, and can operate in dry mode. That is, when the spray layer (4) is closed, the exhaust gas can be directly discharged through the scrubber unit without a bypass.
- this technical solution provides a scrubbing tower, including the above-mentioned through-flow composite tray, wherein the above-mentioned composite tray is placed in the scrubbing tower body (5), and the scrubbing tower One end of the body (5) is provided with a scrubbing tower inlet (6), and the scrubbing tower inlet (6) is placed under the composite tray.
- the scrubbing tower body (5) is provided with a spray layer (4), spraying
- the leaching layer (4) is placed above the composite tray.
- the composite tray is placed at a position about 0.5 m to 1 m above the inlet (6) of the scrubbing tower.
- the through-flow composite tray is suitable for washing towers of sea water method, sea water + sodium hydroxide method, sea water + magnesium hydroxide method and other mixed methods, and has high desulfurization efficiency.
- this technical solution provides a through-flow composite tray suitable for a marine waste gas scrubber, which can be provided with one layer or multiple layers in the scrubber.
- the flow field of the exhaust gas has been evenly distributed due to the first-level tray and spray layer, so the uniformly distributed sieve layer (1) of the second-level tray can be omitted or increased. Porosity to further reduce the pressure drop of the entire tower under multi-layer tray operation.
- the present invention is not limited to the above-mentioned best embodiment. Under the enlightenment of the present invention, anyone can derive other products in various forms, but regardless of any changes in its shape or structure, any product that is the same or similar to the present application Approximate technical solutions fall within the protection scope of the present invention.
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Abstract
A cross-flow composite tray suitable for a ship exhaust gas washing column, placed in a washing column body (5), and at least comprising a uniform distribution sieve plate layer (1), a filler unit layer (2), and a wall flow breaking ring (3) which are paved in sequence from bottom to top. Uniform distribution holes are formed on the uniform distribution sieve plate layer (1), and a liquid film is paved on the uniform distribution sieve plate layer (1); the filler unit layer (2) comprises a filler module; the wall flow breaking ring (3) is a circular ring. The composite tray of the present invention is reasonable in structure, convenient to operate, and capable of satisfying desulfurization efficiency of a washing column, and basically requires no maintenance.
Description
本发明涉及船舶废气脱硫领域，尤其涉及一种船舶废气脱硫的复合型塔盘。The invention relates to the field of ship waste gas desulfurization, in particular to a composite tray for ship waste gas desulfurization.
为了减少船舶尾气中SO2对大气环境的影响，国际海事组织(英文：International Maritime Organization，IMO)第70届海洋环境保护委员会会议规定全球船用燃油硫含量应不超过0.5％，欧洲排放控制区域(ECA)不超过0.1％。In order to reduce the impact of SO2 in ship exhaust on the atmospheric environment, the 70th Marine Environmental Protection Committee meeting of the International Maritime Organization (English: International Maritime Organization, IMO) stipulated that the sulfur content of global marine fuel should not exceed 0.5%. The European Emission Control Area (ECA) ) Does not exceed 0.1%.
目前有三种措施达到IMO对硫排放的要求：使用低硫燃油、使用液化天然气(LNG)、采用船舶废气脱硫装置实现脱硫技术，其中低硫燃油以及液化天然气的燃油成本较高，比对而言，船舶废气脱硫装置被应用于现有的燃油脱硫，在降低成本的同时还提高其适用性。Currently, there are three measures to meet the IMO's sulfur emission requirements: use low-sulfur fuel oil, use liquefied natural gas (LNG), and use ship exhaust gas desulfurization equipment to achieve desulfurization technology. Among them, low-sulfur fuel oil and liquefied natural gas have higher fuel costs. , The ship exhaust gas desulfurization device is applied to the existing fuel desulfurization, which reduces the cost and improves its applicability.
目前船舶废气脱硫装置中的主流塔型为填料塔，也可采用空塔喷淋+塔盘配置。其中填料塔的填料高度一般设置在1m左右，多采用金属板波纹填料，可分1层或多层设置，每层填料上面配置一层喷淋层，喷淋层一般设置的喷嘴较少。填料塔虽然能获得较低的液气比，但通常设计气流速较低，造成塔的直径偏大。且，每层填料层通常由一层或多层填料模块堆叠而成，由于燃油废气中黏性物质较多，如果填料层高度过高，冲洗只能冲洗到表层填料，下层填料模块的无法清洗到，在安装方面：填料模块安装是过盈配合，填料模块拆装不便，拆装过程容易损坏填料表面。采用空塔喷淋+塔盘的方式优点在于可以减少洗涤塔的维护，但是塔盘应进行合适的选型，以在高流速下运行不引起塔的液泛，由于 安装高度的限值，塔盘的数量应尽可能少，并具备一定的操作弹性，以满足船舶经常性的负荷变化。At present, the mainstream tower type in the ship exhaust gas desulfurization device is a packed tower, and an empty tower spray + tray configuration can also be used. The packing height of the packed tower is generally set at about 1m, and metal plate corrugated packing is usually used, which can be arranged in one or more layers. Each layer of packing is equipped with a spray layer, and the spray layer generally has fewer nozzles. Although the packed tower can obtain a lower liquid-to-gas ratio, it is usually designed to have a lower gas flow rate, resulting in a larger diameter of the tower. Moreover, each packing layer is usually stacked by one or more packing modules. Because there are more viscous substances in the fuel exhaust gas, if the height of the packing layer is too high, the flushing can only wash to the surface packing, and the lower packing module cannot be cleaned. In terms of installation, the packing module is installed with an interference fit. The packing module is inconvenient to disassemble and assemble, and the packing surface is easily damaged during disassembly and assembly. The advantage of using the empty tower spray + tray method is that it can reduce the maintenance of the scrubber, but the tray should be selected appropriately to run at a high flow rate without causing flooding of the tower. Due to the limit of the installation height, the tower The number of trays should be as small as possible and have a certain degree of flexibility in operation to meet the frequent load changes of the ship.
另外，无论填料塔或空塔+塔盘，目前已有的船舶废气脱硫装置都没有很好解决壁流问题，洗涤塔内部的喷淋均会产生壁流，壁流层的存在减少了实际参与反应的浆液，增大了实际需要的液气比。同时由于塔中心区域的喷淋密度大，周边喷淋密度小，废气会有向塔周边串流的趋势。实测中发现塔壁区域的SO
2浓度是最大的，越往中心区域SO
2浓度越小，为了提高整套***的脱硫效率，急需解决塔壁区域的SO
2脱除问题。
In addition, regardless of the packed tower or the empty tower + tray, the existing ship exhaust gas desulfurization devices currently do not solve the wall flow problem well. The spray inside the scrubber will produce wall flow, and the existence of the wall flow layer reduces the actual participation. The reacted slurry increases the liquid-gas ratio actually required. At the same time, due to the high spray density in the center of the tower and the low spray density around the tower, the exhaust gas will have a tendency to stream to the periphery of the tower. In the actual measurement, it was found that the SO 2 concentration in the tower wall area was the largest, and the SO 2 concentration in the center area became smaller. In order to improve the desulfurization efficiency of the entire system, it is urgent to solve the SO 2 removal problem in the tower wall area.
发明内容Summary of the invention
本发明的目的在于针对目前船舶废气洗涤塔存在的一些问题，提出一种结构合理、实施方便，能够满足洗涤塔脱硫效率且基本无需维护的一种新型复合塔盘。The purpose of the present invention is to provide a new type of composite tray with reasonable structure and convenient implementation, which can meet the desulfurization efficiency of the scrubber and basically does not require maintenance in view of some of the problems existing in the current ship exhaust gas scrubber.
本技术方案提供一种适用于船舶废气洗涤塔的穿流型复合塔盘，置于洗涤塔塔体内，至少包括：This technical solution provides a through-flow composite tray suitable for a ship's exhaust gas scrubber, which is placed in the scrubber body, and at least includes:
自下而上依次铺设的均布筛板层，填料单元层以及破壁流圈，其中均布筛板层上设有均布孔，且均布筛板层上铺设液膜，填料单元层包括填料模块，破壁流圈为圆环。The uniform sieve layer, the packing unit layer and the broken wall flow circle are laid sequentially from bottom to top. The uniform sieve layer is provided with uniform holes, and the liquid film is laid on the uniform sieve layer. The packing unit layer includes In the packing module, the wall-broken flow ring is a circular ring.
在一些实施例中，均布筛板层上的均布孔的开孔率控制在70％-90％之间，均布孔的开孔直径控制在3-6mm之间。In some embodiments, the opening ratio of the uniformly distributed holes on the uniformly distributed sieve layer is controlled between 70% and 90%, and the opening diameter of the uniformly distributed holes is controlled between 3-6 mm.
在一些实施例中，均布孔均匀布置在均布筛板层上。In some embodiments, the uniformly distributed holes are evenly arranged on the uniformly distributed screen layer.
在一些实施例中，均布筛板层周边位置的均布孔的开口密度大于均布筛板层中心位置的均布孔的开口密度。In some embodiments, the opening density of the uniform holes at the periphery of the uniform screen layer is greater than the opening density of the uniform holes at the center of the uniform screen layer.
在一些实施例中，填料单元层由1-2层金属板波纹填料模块组构成。In some embodiments, the packing unit layer is composed of 1-2 layers of metal plate corrugated packing module groups.
在一些实施例中，填料模块的比表面积宜控制在100～200m
2/m
3范围内，空隙率需大于95％。
In some embodiments, the specific surface area of the packing module should be controlled within the range of 100-200 m 2 /m 3 , and the porosity should be greater than 95%.
在一些实施例中，填料单元层的金属板波纹填料模块组的板波纹填料设计波形上下端预留一部分直段。In some embodiments, the plate corrugated packing of the metal plate corrugated packing module group of the packing unit layer is designed to reserve a portion of straight sections at the upper and lower ends of the waveform.
在一些实施例中，破壁流圈为一圈环板，其上开设有破壁孔，且破壁流圈塔壁倾斜设置。In some embodiments, the wall-broken flow ring is a ring of annular plates, on which wall-broken holes are opened, and the wall of the wall-broken flow ring is inclinedly arranged on the tower wall.
在一些实施例中，破壁流圈与塔壁倾斜的角度控制在30-50°之间，破壁流圈上均匀开设直径在10-14mm之间的破壁孔，开孔率控制在30％-40％范围内。In some embodiments, the angle of inclination of the broken wall flow ring and the tower wall is controlled between 30-50°, broken wall holes with a diameter of 10-14 mm are uniformly opened on the broken wall flow ring, and the opening rate is controlled at 30 %-40%.
在一些实施例中，均布筛板层、填料单元层、破壁流圈均采用能够耐海水、碱液腐蚀的不锈钢材料制备制作。In some embodiments, the uniformly distributed sieve plate layer, the packing unit layer, and the broken wall flow ring are all made of stainless steel materials that are resistant to corrosion by seawater and alkaline solutions.
相较现有技术，本技术方案具有以下的特点和有益效果：Compared with the prior art, this technical solution has the following characteristics and beneficial effects:
1、可有效提高脱硫效率，且塔盘运行稳定。废气通过均布筛板层时，均布废气的同时与筛板层上液膜发生一级反应，随后进入填料单元层，与填料表面的浆液发生二级反应，多级反应全面脱除SO
2，破壁流圈收集利用塔壁壁流，有效捕集周边逃逸的SO
2，减少壁流问题，通过多级的反应，废气中的SO
2能得到更加彻底的脱除，从而有效提高脱硫效率。
1. It can effectively improve the desulfurization efficiency, and the tray runs stably. When the exhaust gas passes through the uniformly distributed sieve layer, the uniformly distributed exhaust gas will react with the liquid film on the sieve layer at the same time, and then enter the packing unit layer and react with the slurry on the surface of the packing in the second stage. The multi-stage reaction completely removes SO 2 The wall-broken flow loop collects and utilizes the tower wall flow to effectively capture the escaped SO 2 from the surrounding area and reduce the wall flow problem. Through multi-stage reactions, the SO 2 in the exhaust gas can be removed more thoroughly, thereby effectively improving the desulfurization efficiency .
2、有效减少塔高塔径，更方便布置安装。相比与空塔喷淋+塔盘的塔，本发明的塔盘设计塔高得到了有效降低，无需设置3-4层或以上喷淋层来保证脱硫效率，通常设置2层塔盘+2层喷淋即可满足97％以上的脱硫效率，相比于填料塔，本发明的塔盘设计具有更高的设计流速，实际塔径将能减少20％左右，这都将缩小洗涤塔的整体尺寸，用材更加节省，同时更便于现场的布置安装。2. Effectively reduce the tower height and tower diameter, making it easier to arrange and install. Compared with the empty tower spray + tray tower, the tower tray design of the present invention has effectively reduced the tower height, and there is no need to set up 3-4 or more spray layers to ensure the desulfurization efficiency, usually 2 layers of trays + 2 Layer spraying can meet the desulfurization efficiency of more than 97%. Compared with the packed tower, the tray design of the present invention has a higher design flow rate, and the actual tower diameter can be reduced by about 20%, which will reduce the overall size of the scrubber. The size and materials are more economical, and at the same time it is more convenient for on-site layout and installation.
3、可干烧，不易堵塞，检修方便。本发明为不锈钢结构，构件强度好，稳 定性高，安装完成后在废气载荷作用下***稳定可靠，同时无须设置废气旁路，可干烧，即在不喷淋的情况下直接通过废气。均布筛板与破壁流圈清洗方便，运行工况下基本不会堵塞。填料单元层由于层高较低，喷淋能够从上到下覆盖，也不易堵塞，即便因特殊工况导致堵塞，也易于用水枪进行冲洗。3. It can be burned dry, not easy to be blocked, and easy to repair. The invention has a stainless steel structure with good component strength and high stability. After installation, the system is stable and reliable under the exhaust gas load. At the same time, there is no need to set up exhaust gas bypass, and it can be dry burned, that is, the exhaust gas can be directly passed through without spraying. The uniformly distributed sieve plate and the broken wall flow circle are easy to clean, and basically will not be blocked under operating conditions. Due to the low layer height of the packing unit layer, the spray can cover from top to bottom, and it is not easy to be blocked. Even if the blockage is caused by special working conditions, it is easy to flush with a water gun.
图1是本发明的一实施例的适用于船舶废气洗涤塔的穿流型复合塔盘的构成图。Fig. 1 is a structural diagram of a through-flow composite tray suitable for a marine exhaust gas scrubbing tower according to an embodiment of the present invention.
图2为均布筛板层的俯视图；Figure 2 is a top view of the uniformly distributed sieve layer;
图3为填料单元层的俯视图；Figure 3 is a top view of the packing unit layer;
图4为破壁流圈的俯视图；Figure 4 is a top view of the broken wall flow ring;
图5为根据本发明一实施例的适用于船舶废气洗涤塔的穿流型复合塔盘的安装方式。Fig. 5 is an installation method of a through-flow composite tray suitable for a marine exhaust gas scrubbing tower according to an embodiment of the present invention.
附图说明：均布筛板层1，填料单元层2，破壁流圈3，喷淋层4，洗涤塔塔体5，洗涤塔入口6。Brief description of the drawings: uniformly distributed sieve plate layer 1, packing unit layer 2, broken wall flow ring 3, spray layer 4, washing tower body 5, and washing tower inlet 6.
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.
本领域技术人员应理解的是，在本发明的揭露中，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、 “顶”、“底”“内”、“外”等指示的方位或位置关系是基于附图所示的方位或位置关系，其仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此上述术语不能理解为对本发明的限制。Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and The description is simplified, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above-mentioned terms should not be construed as limiting the present invention.
可以理解的是，术语“一”应理解为“至少一”或“一个或多个”，即在一个实施例中，一个元件的数量可以为一个，而在另外的实施例中，该元件的数量可以为多个，术语“一”不能理解为对数量的限制。It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element The number can be multiple, and the term "one" cannot be understood as a restriction on the number.
如图1所示，一种适用于船舶废气洗涤塔的穿流型复合塔盘的结构被展示，结构组成见图1，该适用于船舶废气洗涤塔的穿流型复合塔盘至少包括：置于洗涤塔塔体(5)内的自下而上依次铺设的均布筛板层(1)，填料单元层(2)以及破壁流圈(3)，其中均布筛板层(1)上设有均布孔，且均布筛板层(1)上铺设液膜，填料单元层(2)包括填料模块，破壁流圈(3)为圆环。As shown in Figure 1, the structure of a through-flow composite tray suitable for a ship's waste gas scrubber is shown, and the structure is shown in Figure 1. The through-flow composite tray suitable for a ship's waste gas scrubber at least includes: The uniform sieve deck layer (1), the packing unit layer (2) and the broken wall flow circle (3) laid from bottom to top in the washing tower body (5), of which the uniform sieve deck layer (1) There are uniformly distributed holes, and a liquid film is laid on the uniformly distributed sieve plate layer (1), the packing unit layer (2) includes packing modules, and the wall-broken flow ring (3) is a circular ring.
如图2所示，均布筛板层(1)上的均布孔的开孔率控制在70％-90％之间，可以是80％，以期在达彻底的废气均布的同时保证更多的废气通过，提高均布的效率。优选地，在本技术方案中，均布孔的开孔率控制在70％。As shown in Figure 2, the opening rate of the uniformly distributed holes on the uniformly distributed sieve layer (1) is controlled between 70% and 90%, which can be 80%, in order to achieve a thorough exhaust gas uniformity while ensuring more More exhaust gas passes through to improve the efficiency of uniform distribution. Preferably, in this technical solution, the opening rate of uniformly distributed holes is controlled at 70%.
均布孔的开孔直径控制在3-6mm之间，可以是4、5、3.5、4.5等，在本技术方案中优选均布孔的开孔直径为
以尽可能减少气体流经的压降。在本技术方案中，均布指的是均匀分布的意思。
The aperture diameter of the uniformly distributed holes is controlled between 3-6mm, which can be 4, 5, 3.5, 4.5, etc. In this technical solution, the aperture diameter of the uniformly distributed holes is preferably In order to minimize the pressure drop through the gas flow. In this technical solution, uniform distribution refers to uniform distribution.
在本技术方案的一实施例中，均布孔可为相同孔径形状的孔洞。In an embodiment of the present technical solution, the uniformly-distributed holes may be holes with the same aperture shape.
在本技术方案的一实施例中，均布孔均匀布置在均布筛板层(1)上；或者，均布筛板层(1)周边位置的均布孔的开口密度大于均布筛板层(1)中心位置的均布孔的开口密度。In an embodiment of the present technical solution, the uniformly distributed holes are evenly arranged on the uniformly distributed sieve layer (1); or, the opening density of the uniformly distributed holes in the peripheral position of the uniformly distributed sieve layer (1) is greater than that of the uniformly distributed sieve The opening density of uniformly distributed holes in the center of layer (1).
均布筛板层(1)上铺设的液膜由脱硫材料制备得到。The liquid film laid on the uniformly distributed sieve plate layer (1) is prepared from the desulfurization material.
其工作原理如下：船舶废气经洗涤塔入口进入塔内后，经均布筛板层(1)进行均布，废气经筛孔穿流通过进行均布，同时与均布筛板层(1)上的液膜接触，进行第一级的脱硫反应，均布筛板层(1)能够最大程度上均布进入塔内的废气，使废气能够均匀地与喷淋浆液进行充分接触反应，减少因局部流场不均匀导致的气液接触不充分或废气逃逸等问题，同时能够减少船舶晃动对塔内废气流动的影响。Its working principle is as follows: after the ship exhaust enters the tower through the inlet of the scrubber, it is uniformly distributed through the uniformly distributed sieve layer (1), and the exhaust gas flows through the sieve holes for uniform distribution, and at the same time it is uniformly distributed with the uniformly distributed sieve layer (1). The liquid film on the upper surface is in contact with the first stage of the desulfurization reaction. The uniformly distributed sieve layer (1) can uniformly distribute the exhaust gas entering the tower to the greatest extent, so that the exhaust gas can evenly and the spray slurry fully contact and react, reducing the factor Insufficient gas-liquid contact or exhaust gas escape caused by uneven local flow field, and at the same time can reduce the impact of ship shaking on the flow of exhaust gas in the tower.
如图3所示，填料单元层(2)由1-2层金属板波纹填料模块组构成，且填料模块的比表面积宜控制在100～200m
2/m
3范围内，可以是120，150，170m
2/m
3，空隙率需大于95％，以保证足够的反应面积与最小的压降。
As shown in Figure 3, the packing unit layer (2) is composed of 1-2 layers of metal plate corrugated packing modules, and the specific surface area of the packing modules should be controlled within the range of 100-200m 2 /m 3 , which can be 120, 150, 170m 2 /m 3 , the void ratio must be greater than 95% to ensure sufficient reaction area and minimum pressure drop.
在本技术方案中，通常设置2层塔盘+2层喷淋即可满足97％以上的脱硫效率，相比于填料塔，本发明的塔盘设计具有更高的设计流速，实际塔径将能减少20％左右。In this technical solution, usually two-layer tray + two-layer spray can meet the desulfurization efficiency of more than 97%. Compared with the packed tower, the tray design of the present invention has a higher design flow rate, and the actual tower diameter is It can be reduced by about 20%.
为了保证洗涤塔浆液流通更加顺畅，减少运行压降，填料单元层(2)的金属板波纹填料模块组的板波纹填料设计波形上下端预留一部分直段。In order to ensure smoother circulation of the scrubber slurry and reduce operating pressure drop, the plate corrugated packing of the metal plate corrugated packing module group of the packing unit layer (2) is designed to reserve a part of straight sections at the upper and lower ends of the waveform.
且，填料单元层(2)设置在距离均布筛板层(1)上方约0.5-1m的位置。Moreover, the packing unit layer (2) is arranged at a position about 0.5-1 m above the uniformly distributed sieve plate layer (1).
填料单元层(2)的高度宜控制400mm左右，以避免高气速下塔内形成液泛。换言之，填料单元层不宜设置过高，否则塔内气体设计流速会偏小，同时塔易引起液泛，整体操作的压降会较大。The height of the packing unit layer (2) should be controlled at about 400mm to avoid flooding in the tower at high gas velocity. In other words, the packing unit layer should not be set too high, otherwise the design flow rate of the gas in the tower will be too small, and the tower will easily cause flooding, and the pressure drop of the overall operation will be relatively large.
填料单元层(2)的填料选型根据实际运行工况、设计流速进行选型设计。The packing type of packing unit layer (2) is selected and designed according to actual operating conditions and design flow rate.
工作原理：废气在填料单元层(2)的填料表面与浆液进行第二级充分反应，脱除废气中的SO
2，经过二级脱硫反应，废气中的主要部分SO
2能够被脱除，此时塔中心区域的SO
2浓度维持在较低水平，而塔周边由于实际覆盖的喷淋密度小，且由于壁流的存在，周边填料表面不能得到很好的湿润，实际脱硫反应的 效率远不如中心区域。因此大部分的SO
2其实是从周边逃逸的。所以，经过二级脱硫反应后，在填料单元层(2)上方设置破壁流圈(3)。
Working principle: The waste gas reacts fully with the slurry on the filler surface of the filler unit layer (2) in the second stage to remove SO 2 from the waste gas. After a secondary desulfurization reaction, the main part of SO 2 in the waste gas can be removed. At this time, the SO 2 concentration in the center of the tower is maintained at a low level, while the actual coverage of the spray density around the tower is small, and the surface of the surrounding packing cannot be well moistened due to the existence of wall flow, and the actual desulfurization reaction efficiency is far worse. Central region. Therefore, most of the SO 2 actually escapes from the surrounding area. Therefore, after the secondary desulfurization reaction, a broken wall flow ring (3) is arranged above the packing unit layer (2).
如图3所示，破壁流圈(3)为一圈环板，其上开设有破壁孔，且破壁流圈(3)塔壁倾斜设置。破壁流圈(3)设置的位置应根据喷淋层喷嘴的布置来确定，需保证喷淋层喷淋的浆液距圈板与塔体的焊缝有一定的距离，以使得喷淋浆液不直接冲刷在破壁流圈(3)上。As shown in Fig. 3, the wall-broken flow ring (3) is a ring plate with broken wall holes, and the wall-broken flow ring (3) is arranged obliquely on the tower wall. The location of the broken wall flow ring (3) should be determined according to the nozzle layout of the spray layer. It is necessary to ensure that the spray layer sprayed by the spray layer has a certain distance from the weld between the ring plate and the tower body, so that the spray slurry does not Wash directly on the broken wall flow circle (3).
在本技术方案中，破壁流圈(3)与塔壁倾斜的角度控制在30-50°之间，优选地呈45°设置，环板上均匀开设直径在10-14mm之间不等的破壁孔，优选为
的小孔，开孔率控制在30％-40％范围内，优选为35％，以控制通过小孔的气速及浆液通过的流量。
In this technical solution, the angle of inclination of the broken wall flow ring (3) and the tower wall is controlled between 30-50°, preferably set at 45°, and the ring plate is evenly provided with diameters ranging from 10-14mm Broken hole, preferably The opening rate of the small holes is controlled in the range of 30%-40%, preferably 35%, to control the gas velocity through the small holes and the flow rate of the slurry.
工作原理：壁流经破壁流圈(3)收集后，通过圈上的破壁孔均匀地覆盖住周边填料模块。同时，通过破壁孔的一部分废气与破壁流圈(3)上收集的浆液进行反应，有效脱除一部分从周边逃逸的SO
2，另一部分废气则因为破壁流圈(3)的导流作用，绕过破壁流圈(3)，从中心区域通过喷淋区，实现周边SO
2的捕集。
Working principle: After the wall flow is collected by the broken wall flow ring (3), the surrounding packing modules are evenly covered by the broken wall holes on the ring. At the same time, part of the exhaust gas passing through the broken wall hole reacts with the slurry collected on the broken wall ring (3), effectively removing part of the SO 2 escaping from the periphery, and the other part of the exhaust gas is caused by the diversion of the broken wall ring (3). The function is to bypass the wall-broken flow circle (3) and pass through the spray area from the central area to achieve the capture of surrounding SO 2.
值得注意的是，均布筛板层(1)、填料单元层(2)、破壁流圈(3)均采用能够耐海水、碱液腐蚀的不锈钢材料制备制作，同时能够在干模式下运行，即在喷淋层(4)关闭的情况下，废气能够直接通过洗涤塔单元直接排放，而无须设置旁路。It is worth noting that the uniformly distributed sieve layer (1), the packing unit layer (2), and the broken wall flow ring (3) are all made of stainless steel that can withstand corrosion by seawater and lye, and can operate in dry mode. That is, when the spray layer (4) is closed, the exhaust gas can be directly discharged through the scrubber unit without a bypass.
如图4所示，本技术方案提供一洗涤塔，包括其上提到的穿流型复合塔盘，其中其上提到的复合塔盘置于洗涤塔塔体(5)内，洗涤塔塔体(5)的一端设有洗涤塔入口(6)，且洗涤塔入口(6)置于复合塔盘的下方，另，洗涤塔塔体(5)内部设有喷淋层(4)，喷淋层(4)置于复合塔盘的上方。优选的，复 合塔盘置于洗涤塔入口(6)上方约0.5m～1m左右的位置。As shown in Figure 4, this technical solution provides a scrubbing tower, including the above-mentioned through-flow composite tray, wherein the above-mentioned composite tray is placed in the scrubbing tower body (5), and the scrubbing tower One end of the body (5) is provided with a scrubbing tower inlet (6), and the scrubbing tower inlet (6) is placed under the composite tray. In addition, the scrubbing tower body (5) is provided with a spray layer (4), spraying The leaching layer (4) is placed above the composite tray. Preferably, the composite tray is placed at a position about 0.5 m to 1 m above the inlet (6) of the scrubbing tower.
值得一提的是，该穿流型复合塔盘适用于海水法、海水+氢氧化钠法、海水+氢氧化镁法以及其他混合法的洗涤塔内，具有高效的脱硫效率。It is worth mentioning that the through-flow composite tray is suitable for washing towers of sea water method, sea water + sodium hydroxide method, sea water + magnesium hydroxide method and other mixed methods, and has high desulfurization efficiency.
总结而言，本技术方案提供一种适用于船舶废气洗涤塔的穿流型复合塔盘，其在洗涤塔内可以设置1层也可以设置多层。当多层设置时，由于经过第一级的塔盘及喷淋层，废气的流场已经得到了均布，因此第二层塔盘的均布筛板层(1)可以省去或提高开孔率，以进一步减小多层塔盘工作下的整塔压降。In summary, this technical solution provides a through-flow composite tray suitable for a marine waste gas scrubber, which can be provided with one layer or multiple layers in the scrubber. When multiple layers are set up, the flow field of the exhaust gas has been evenly distributed due to the first-level tray and spray layer, so the uniformly distributed sieve layer (1) of the second-level tray can be omitted or increased. Porosity to further reduce the pressure drop of the entire tower under multi-layer tray operation.
本发明不局限于上述最佳实施方式，任何人在本发明的启示下都可得出其他各种形式的产品，但不论在其形状或结构上作任何变化，凡是具有与本申请相同或相近似的技术方案，均落在本发明的保护范围之内。The present invention is not limited to the above-mentioned best embodiment. Under the enlightenment of the present invention, anyone can derive other products in various forms, but regardless of any changes in its shape or structure, any product that is the same or similar to the present application Approximate technical solutions fall within the protection scope of the present invention.
Claims (10)
- 一种适用于船舶废气洗涤塔的穿流型复合塔盘，置于洗涤塔塔体(5)内，其特征在于，至少包括：A through-flow composite tray suitable for a ship exhaust gas scrubber, which is placed in the scrubber body (5), and is characterized in that it at least includes:自下而上依次铺设的均布筛板层(1)，填料单元层(2)以及破壁流圈(3)，其中均布筛板层(1)上设有均布孔，且均布筛板层(1)上铺设液膜，填料单元层(2)包括填料模块，破壁流圈(3)为圆环。The uniform sieve layer (1), the packing unit layer (2) and the broken wall flow ring (3) are laid sequentially from bottom to top, and the uniform sieve layer (1) is provided with uniformly distributed holes and uniformly distributed A liquid film is laid on the sieve layer (1), the packing unit layer (2) includes packing modules, and the wall-broken flow ring (3) is a circular ring.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，均布筛板层(1)上的均布孔的开孔率控制在70％-90％之间，均布孔的开孔直径控制在3-6mm之间。The through-flow composite tray suitable for marine exhaust gas scrubbers according to claim 1, characterized in that the opening rate of the uniformly distributed holes on the uniformly distributed sieve layer (1) is controlled to be between 70% and 90% In between, the opening diameter of the uniformly distributed holes is controlled between 3-6mm.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，均布孔均匀布置在均布筛板层(1)上。The through-flow composite tray suitable for a marine exhaust gas scrubber according to claim 1, characterized in that the uniformly distributed holes are evenly arranged on the uniformly distributed sieve plate layer (1).
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，均布筛板层(1)周边位置的均布孔的开口密度大于均布筛板层(1)中心位置的均布孔的开口密度。The through-flow composite tray suitable for a marine exhaust gas scrubber according to claim 1, characterized in that the opening density of the uniformly distributed holes at the peripheral position of the uniformly distributed sieve layer (1) is greater than that of the uniformly distributed sieve layer (1). ) The opening density of the uniformly distributed holes in the center.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，填料单元层(2)由1-2层金属板波纹填料模块组构成。The through-flow composite tray suitable for a marine exhaust gas scrubber according to claim 1, wherein the packing unit layer (2) is composed of 1-2 layers of metal plate corrugated packing module groups.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，填料模块的比表面积宜控制在100～200㎡/m 3范围内，空隙率需大于95％。 The through-flow composite tray suitable for marine exhaust gas scrubbers according to claim 1, characterized in that the specific surface area of the packing module should be controlled within the range of 100-200 square meters/m 3 , and the porosity must be greater than 95%.
- 根据权利要求5所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，填料单元层(2)的金属板波纹填料模块组的板波纹填料设计波形上下端预留一部分直段。The through-flow composite tray suitable for marine exhaust gas scrubbers according to claim 5, characterized in that the plate corrugated packing design of the metal plate corrugated packing module group of the packing unit layer (2) reserves a part of the straight at the upper and lower ends of the waveform. segment.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，破壁流圈(3)为一圈环板，其上开设有破壁孔，且破壁流圈(3)塔 壁倾斜设置。The through-flow composite tray suitable for the ship exhaust gas scrubbing tower according to claim 1, characterized in that the broken wall flow ring (3) is a ring of annular plate, and broken wall holes are opened on it, and the broken wall flow Ring (3) The tower wall is inclined.
- 根据权利要求8所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，破壁流圈(3)与塔壁倾斜的角度控制在30-50°之间，破壁流圈(3)上均匀开设直径在10-14mm之间的破壁孔，开孔率控制在30％-40％范围内。The through-flow composite tray suitable for the ship exhaust gas scrubbing tower according to claim 8, characterized in that the inclination angle of the wall-broken flow circle (3) and the tower wall is controlled between 30-50°, and the wall-broken flow The ring (3) is evenly provided with broken wall holes with a diameter between 10-14mm, and the opening rate is controlled within the range of 30%-40%.
- 根据权利要求1所述的适用于船舶废气洗涤塔的穿流型复合塔盘，其特征在于，均布筛板层(1)、填料单元层(2)、破壁流圈(3)均采用能够耐海水、碱液腐蚀的不锈钢材料制备制作。The through-flow composite tray suitable for marine exhaust gas scrubbing towers according to claim 1, characterized in that the uniformly distributed sieve plate layer (1), packing unit layer (2), and broken wall flow circle (3) are all adopted The stainless steel material can be made of corrosion-resistant seawater and lye.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358510.5 | 2019-12-25 | ||
| CN201911358510.5A CN110975545A (en) | 2019-12-25 | 2019-12-25 | Flow-through type composite tower tray suitable for ship exhaust gas washing tower |
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| WO2021128496A1 true WO2021128496A1 (en) | 2021-07-01 |
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| PCT/CN2020/071280 WO2021128496A1 (en) | 2019-12-25 | 2020-01-10 | Cross-flow composite tray suitable for ship exhaust gas washing column |
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| WO (1) | WO2021128496A1 (en) |
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| CN111939726B (en) * | 2020-07-17 | 2023-01-24 | 淮阴工学院 | Filler absorption tower and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201510831U (en) * | 2009-09-16 | 2010-06-23 | 辽阳辽东精细化工有限公司 | Waste gas absorber |
| CN107913581A (en) * | 2017-09-26 | 2018-04-17 | 朱智慧 | A kind of industrial waste gas processing packed tower |
| KR20190060368A (en) * | 2017-11-24 | 2019-06-03 | 한국에너지기술연구원 | High purity process for gases containing amines |
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2019
- 2019-12-25 CN CN201911358510.5A patent/CN110975545A/en active Pending
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201510831U (en) * | 2009-09-16 | 2010-06-23 | 辽阳辽东精细化工有限公司 | Waste gas absorber |
| CN107913581A (en) * | 2017-09-26 | 2018-04-17 | 朱智慧 | A kind of industrial waste gas processing packed tower |
| KR20190060368A (en) * | 2017-11-24 | 2019-06-03 | 한국에너지기술연구원 | High purity process for gases containing amines |
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