WO2019015443A1 - 脱硫塔加热除雾装置 - Google Patents

脱硫塔加热除雾装置 Download PDF

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Publication number
WO2019015443A1
WO2019015443A1 PCT/CN2018/092104 CN2018092104W WO2019015443A1 WO 2019015443 A1 WO2019015443 A1 WO 2019015443A1 CN 2018092104 W CN2018092104 W CN 2018092104W WO 2019015443 A1 WO2019015443 A1 WO 2019015443A1
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Prior art keywords
heating
desulfurization tower
flue gas
defogging
heating pipe
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PCT/CN2018/092104
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English (en)
French (fr)
Inventor
钱学略
范国军
刘茂玲
刘兵
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上海伏波环保设备有限公司
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Publication of WO2019015443A1 publication Critical patent/WO2019015443A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

Definitions

  • the invention relates to a wet desulfurization flue gas desulfurization device, in particular to a desulfurization tower defogging device with heating function.
  • the wet desulfurization of sulfur-containing flue gas by the wet desulfurization system by limestone gypsum method is widely used in domestic coal-fired thermal power units, which has the advantages of fast desulfurization reaction, high efficiency and high utilization rate of desulfurization additives.
  • the flue gas after wet desulfurization has high water content, low temperature, easy to coagulate, and also contains strong corrosive substances such as fluoride and chloride. It is easy to form low temperature and high humidity acid corrosion for the downstream equipment of flue gas, that is, Downstream equipment, such as chimneys, are highly corrosive.
  • a defogger and a heater are generally arranged on the discharge path after flue gas desulfurization, and the defogger is used to remove droplets in the flue gas, and these droplets not only contain water It also contains corrosive substances, which are the main sources of corrosion of the equipment; heaters are used to increase the temperature of the flue gas, reduce the amount of condensation of the droplets, and prevent the occurrence of corrosion reactions.
  • the existing demister plate includes plates which are bent along the discharge path of the flue gas, and the adjacent plates form a curved passage for the passage of the flue gas, and the droplets with the droplets pass through the curved passage, the droplets therein Under the action of inertia, the flow path cannot be changed in time, and the plate is struck and trapped on the plate to achieve the purpose of defogging.
  • the demister cannot completely and efficiently remove the droplets in the flue gas, the flue gas containing corrosive substances and a large amount of moisture will further flow to the heater, so that the heater is in a harsh working environment and is more susceptible to corrosion. Small service life.
  • the Chinese invention patent specification with the application number 201611216437.4 discloses a desulfurization tower defogger, the desulfurization tower includes a desulfurization tower body, the lower side of the desulfurization tower body is provided with an air inlet port and a circulating water discharge port, and the top portion is provided with an air outlet port.
  • the mist eliminator includes a wave baffle and a jet tube that are respectively connected to the contour support members of the inner wall of the desulfurization tower.
  • the technical problem to be solved by the present invention is to provide a desulfurization tower heating and demisting device to overcome the above-mentioned drawbacks of the prior art.
  • the present invention provides a desulfurization tower defogging device comprising at least one heating defogging unit; each heating defogging unit comprises a plurality of plates arranged in a row, leaving between adjacent plates The spacing forms a flue gas passage for the flow of flue gas, and the plate is provided with a guiding surface; each of the plates for heating the demisting unit is connected by a heating pipe, and the plate is fixedly connected to the heating pipe.
  • the intermediate position of the plate is provided with a connecting hole, and the heating pipe sequentially passes through the connecting hole of each of the plates.
  • the heating tube is a serpentine tube or a U-shaped tube.
  • the heating pipe comprises a heating manifold, and the heating manifold is provided with a plurality of heating pipes, and each heating pipe is connected with a corresponding plate.
  • the heating and defogging unit is provided with two or more, arranged in order along the flow direction of the flue gas.
  • the sheet is streamlined or broken.
  • the heating medium in the heating pipe is hot water or hot air.
  • the sheet and the heating tube are made of stainless steel, fluoroplastic, polypropylene or fiber reinforced material.
  • the desulfurization tower defogging device has the following advantageous effects: the invention has the defogging plate piece connected in series through the heating pipe, and can completely and efficiently remove the liquid droplets in the flue gas while heating into the downstream. Flue gas, better maintain the downstream flue gas reheater from low temperature corrosion.
  • the mist eliminator of the invention can be flexibly arranged, can be installed in the desulfurization tower as a defogger alone, can also be installed in the middle position of the multi-stage defogger, or placed downstream of the desulfurization tower as a part of the flue gas reheater. It is used together with the flue gas reheater; the invention can also be used independently as a heater, and is arranged before the demister or after the defogger.
  • Fig. 1 is a schematic view showing the structure of a first embodiment of a heating and defogging unit.
  • FIG. 2 is a schematic structural view of a second embodiment of a heated defogging unit.
  • Fig. 3 is a schematic view showing the structure of a third embodiment of the heating and defogging unit.
  • Fig. 4 is a schematic view showing the structure of a fourth embodiment of the heating and defogging unit.
  • Figure 5 is a schematic view of the structure of the present invention.
  • the present invention provides a desulfurization tower defogging device, which is installed in a desulfurization tower or connected to a rear side of a desulfurization tower, and the desulfurization tower is in the field.
  • the desulfurization tower heating demisting device comprises one, two or more heating defogging units 1, as shown in FIG.
  • the desulfurization tower heating defogging device further includes a flushing device 5 for cleaning the heated defogging unit 1.
  • the heating and defogging unit 1 involved in the present invention may be arranged horizontally or vertically.
  • the heating and defogging unit 1 is horizontally arranged as a reference direction, wherein the directions of the arrows in FIGS. 1 to 4 and 5 represent The flow direction of the flue gas, as shown in FIG. 1 to FIG. 4, each of the heating and demisting units 1 includes a plurality of sheets 2, and the plurality of sheets 2 are sequentially arranged in a row.
  • the sheets 2 are identical in shape and should be parallel. Arrangement.
  • a spacing is formed between adjacent sheets 2 to form a flue gas passage 3 for the flow of flue gas, and the sheet 2 is provided with a guiding surface 21 for guiding the flow of flue gas, and the flue gas with droplets passes through the flue gas passage.
  • the heating defogging unit 1 of the present invention further comprises a heating unit through the heating tube.
  • each heated demisting unit 1 is connected in series or in parallel via a heating tube 4, the plate 2 being fixed on the heating tube 4, the plate 2 and the heating tube 4 being
  • the heating and demisting unit 1 can also be integrally formed, and the heating tube 4 can increase the temperature of the flue gas and reduce the amount of condensation of the droplets, thereby avoiding the occurrence of low temperature corrosion.
  • the first and second embodiments are in which the sheets 2 are connected in series by a heating tube 4, and in the third embodiment, the sheets 2 are connected in parallel via a heating tube 4. :
  • a connecting hole (not shown) is disposed at an intermediate position of each of the plates 2, and the heating tube 4 passes through each of the plates 2 in sequence.
  • the connecting holes are such that all the plates 2 are sequentially fixed on the heating pipe 4, and the heating pipe 4 can increase the temperature of the flue gas in the flue gas passage 3 and avoid acid dew corrosion of the downstream equipment.
  • the heating tube 4 is a serpentine tube or a U-shaped tube.
  • the U-tube can be used to carry the sheet. 2 Connection, when the sheet 2 is disposed more than two, the sheet 2 may be sequentially connected by a serpentine tube.
  • the heating tube 4 is a serpentine tube or a U-row tube, so that the temperature in each of the flue gas passages 3 is more uniform, and the amount of condensation of the droplets is more reliably reduced.
  • the heating pipe 4 includes a heating main pipe, and the heating main pipe is provided with a plurality of heating pipes, each heating pipe is connected with the heating main pipe, and each heating pipe is connected with a corresponding plate (fig. Not shown in the middle), the diameter of the heating pipe can be selected according to the specific applicable environment, and the heating temperature is changed by adjusting the flow rate of the entering heating medium.
  • the sheet 2 is in a streamlined or polygonal shape, so that when the flue gas with droplets passes through the curved passage, the droplets therein cannot change the flow path in time under the action of inertia.
  • the impact plate is trapped on the plate to achieve the purpose of defogging.
  • the heating medium in the heating pipe 4 is hot water or hot air.
  • the sheet 2 and the heating tube 4 are made of stainless steel, fluoroplastic, polypropylene or fiber reinforced material.
  • the mist eliminator of the invention can be flexibly arranged, can be installed in the desulfurization tower as a defogger alone, can also be installed in the middle position of the multi-stage defogger, or placed downstream of the desulfurization tower as a part of the flue gas reheater. It is used together with the flue gas reheater; the invention can also be used independently as a heater, and is arranged before the demister or after the defogger.
  • the invention is convenient to manufacture and use, and can better maintain the downstream flue gas reheater from low temperature corrosion, and has high economic value and social benefit.
  • the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

Abstract

一种脱硫塔加热除雾装置，包括至少一个加热除雾单元(1)；每个加热除雾单元(1)包括成排布置的多个板片(2)，相邻的板片(2)之间留有间距形成供烟气流动的烟气通道(3)，板片(2)上设有导向面(21)；每个加热除雾单元(1)的板片(2)通过加热管(4)连接，板片(2)固定连接在加热管(4)上。

Description

脱硫塔加热除雾装置 技术领域
本发明涉及一种湿法脱硫烟气脱硫装置，特别是涉及一种带加热功能的脱硫塔除雾装置。
背景技术
现阶段，利用石灰石石膏法通过湿法脱硫系统对含硫烟气进行湿法脱硫被广泛应用在国内燃煤火电机组，其具有脱硫反应快、效率高、脱硫添加剂利用率高等优点。但是，湿法脱硫后的烟气含水量高、温度低、易凝结，还含有氟化物和氯化物等强腐蚀性物质，对于烟气下游设备较易形成低温高湿稀酸型腐蚀，即对下游设备，如烟囱等具有较强的腐蚀性。
为了减小脱硫后的烟气对设备的腐蚀程度，一般在烟气脱硫后的排出路径上设置除雾器和加热器，除雾器用于除去烟气中的液滴，这些液滴不仅含有水分，还含有腐蚀性物质，是设备的主要腐蚀源；加热器用于提高烟气温度，减少液滴的凝结量，而阻止腐蚀反应的发生。现有的除雾器板片，包括沿烟气的排出路径弯折的各板片，相邻板片形成弯曲通道供烟气通过，带液滴的烟气通过弯曲通道时，其中的液滴在惯性作用下不能够及时改变流动路径，而撞击板片并被捕集在板片上，达到除雾的目的。
由于除雾器不能彻底、高效地除去烟气中的液滴，含有腐蚀性物质和大量水分的烟气将进一步地流向加热器，使加热器处于恶劣的工作环境，较易受到腐蚀，而减小使用寿命。
申请号为201611216437.4的中国发明专利说明书中公开了一种脱硫塔除雾器，脱硫塔包括脱硫塔体,脱硫塔体下方一侧设有进气口和循环水排放口，顶部设有出气口，除雾器包括分别与脱硫塔体内壁的等高支撑件连接的波浪式折流件和喷流管。上述脱硫塔除雾器虽然可以除去烟气中的液滴，但是后面的加热器仍处在恶劣环境下，仍然容易腐蚀。
因此，如何提供一种带加热功能的除雾装置，使其具有较好的除雾效果，同时能够有效减缓烟气对下游设备的腐蚀，是本领技术人员需要解决的技术问题。
发明内容
本发明要解决的技术问题是提供一种脱硫塔加热除雾装置，以克服现有技术的上述缺陷。
为实现上述目的，本发明提供一种脱硫塔加热除雾装置，包括至少一个加热除雾单元；每个加热除雾单元包括成排布置的多个板片，相邻的板片之间留有间距形成供烟气流动的烟气通道，所述板片上设有导向面；每个加热除雾单元的板片通过加热管连接，所述板片固定连接在所述加热管上。
优选地，所述板片的中间位置设有连接孔，所述加热管依次穿过每个板片的连接孔。
优选地，所述加热管为蛇形管或U型管。
优选地，所述加热管包括加热总管，所述加热总管上设有多根加热分管，每根加热分管上连接相应的板片。
优选地，所述加热除雾单元设有两个或多个，沿烟气流动方向依次布置。
优选地，所述板片呈流线型或折线形。
优选地，所述加热管中的加热介质为热水或热风。
优选地，所述板片和加热管采用不锈钢、氟塑料、聚丙烯或纤维增强材料制成。
如上所述，本发明涉及的脱硫塔加热除雾装置，具有以下有益效果：本发明将除雾板片通过加热管串联，能够彻底、高效地除去烟气中的液滴的同时加热进入下游的烟气，较好地维护下游烟气再热器不受低温腐蚀。本发明除雾器可灵活布置，可以安装在脱硫塔内单独作为除雾器使用，也可以安装在多级除雾器的中间位置，或置于脱硫塔的下游作为烟气再热器的一部分与烟气再热器配套使用；本发明还可独立作为加热器使用，设置在除雾器前或除雾器后。
附图说明
图1为加热除雾单元的第一种实施例的结构示意图。
图2为加热除雾单元的第二种实施例的结构示意图。
图3为加热除雾单元的第三种实施例的结构示意图。
图4为加热除雾单元的第四种实施例的结构示意图。
图5为本发明的结构示意图。
元件标号说明
1                     加热除雾单元
2                     板片
21                    导向面
3                     烟气通道
4                     加热管
5                     冲洗装置
具体实施方式
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
须知，本说明书所附图式所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容得能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”等的用语，亦仅为便于叙述的明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。
如图1至图5所示，本发明提供一种脱硫塔加热除雾装置，所述脱硫塔加热除雾装置安装在脱硫塔内或者连接在脱硫塔后侧，所述脱硫塔为本领域的常规技术，可参考背景技术的脱硫塔，在此不再赘述。所述脱硫塔加热除雾装置包括一个、两个或多个加热除雾单元1，如图5所示，当加热除雾单元1设有两个或者多个时，沿烟气流动方向布置，可以更有效地去除烟气中的液滴，脱硫塔加热除雾装置还包括用于清洗所述加热除雾单元1的冲洗装置5。
本发明中涉及的加热除雾单元1可以水平布置或垂直布置，在以下实施例中，均以加热除雾单元1水平布置为参考方向，其中图1至图4、图5中的箭头方向表示烟气流动方向，如图1至图4所示，每个加热除雾单元1包括多个板片2，多个板片2依次排列成一排，通常所述各板片2形状相同，应平行布置。相邻的板片2之间留有间距形成供烟气流动的烟气通道3，所述板片2上设有引导烟气流动的导向面21，当带液滴的烟气经过烟气通道3时，烟气的液滴在惯性作用下不能够及时改变流动路径，撞击板片2从而被捕集在板片2上，本发明中的加热除雾单元1还包括加热单元，通过加热管4实现，每个加热除雾单元1的板片2通过加热管4串联或并联在一起，所述板片2固定在所述加热管4上，所述板片2和所述加热管4可以分段制成，也可一体成型制成所述加热除雾单元1，所述加热管4可提高烟气温度，减少液滴的凝结量，而避免低温腐蚀的发生。
以下给出加热除雾单元1的三种实施方式，其中第一种和第二种实施方式为板片2通过加热管4串联连接，第三种实施方式为板片2通过加热管4并联连接：
第一种实施方式，如图1和图2所示，每个所述板片2的中间位置均设有连接孔(图中未显示)，所述加热管4依次穿过每个板片2的连接孔，使得所有的板片2依次固定在所述加热管4上，加热管4可以提高烟气通道3中的烟气温度，避免下游设备的酸露腐蚀。
第二种实施方式，如图3和图4所示，所述加热管4为蛇形管或U形管，当所述板片2 设有两个，可采用U行管将所述板片2连接，当所述板片2设置超过两个，可采用蛇形管将所述板片2依次连接。将所述加热管4为蛇形管或U行管，使得所述烟气通道3中的各处温度更均匀，更可靠地减少液滴的凝结量。
第三种实施方式，所述加热管4包括一根加热总管，所述加热总管上设有多根加热分管，每根加热分管与加热总管连通，每根加热分管上连接相应的板片(图中未显示)，加热分管的直径可以根据具体适用环境选用，通过调节进入的加热介质流量改变加热温度。
如图1至图4所示，优选地，所述板片2呈流线型或折线形，使带液滴的烟气通过弯曲通道时，其中的液滴在惯性作用下不能够及时改变流动路径，而撞击板片并被捕集在板片上，达到除雾的目的。
优选地，所述加热管4中的加热介质为热水或热风。优选地，所述板片2和加热管4采用不锈钢、氟塑料、聚丙烯或纤维增强材料制成。本发明除雾器可灵活布置，可以安装在脱硫塔内单独作为除雾器使用，也可以安装在多级除雾器的中间位置，或置于脱硫塔的下游作为烟气再热器的一部分与烟气再热器配套使用；本发明还可独立作为加热器使用，设置在除雾器前或除雾器后。本发明制造、使用方便，能够较好地维护下游烟气再热器不受低温腐蚀，具有很高的经济价值和社会效益。
综上所述，本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。

Claims (8)

  1. 一种脱硫塔加热除雾装置，其特征在于，包括至少一个加热除雾单元(1)；每个加热除雾单元(1)包括成排布置的多个板片(2)，相邻的板片(2)之间留有间距形成供烟气流动的烟气通道(3)，所述板片(2)上设有导向面(21)；每个加热除雾单元(1)的板片(2)通过加热管(4)连接，所述板片(2)固定连接在所述加热管(4)上。
  2. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述板片(2)的中间位置设有连接孔，所述加热管(4)依次穿过每个板片(2)的连接孔。
  3. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述加热管(4)为蛇形管或U型管。
  4. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述加热管包括加热总管，所述加热总管上设有多根加热分管，每根加热分管上连接相应的板片。
  5. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述加热除雾单元(1)设有两个或多个，沿烟气流动方向依次布置。
  6. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述板片(2)呈流线型或折线形。
  7. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述加热管(4)中的加热介质为热水或热风。
  8. 根据权利要求1所述的脱硫塔加热除雾装置，其特征在于：所述板片(2)和加热管(4)采用SUS316L钢、SUS317L钢、氟塑料、聚丙烯或纤维增强材料制成。
PCT/CN2018/092104 2017-07-19 2018-06-21 脱硫塔加热除雾装置 WO2019015443A1 (zh)

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CN109395494A (zh) * 2018-12-12 2019-03-01 稳中环保科技投资(广州)有限公司 一种智能化有害物质处理装置
CN111974192A (zh) * 2019-05-22 2020-11-24 镇江东亚碳素焦化有限公司 一种脱硫系统
CN111729407A (zh) * 2020-06-09 2020-10-02 范兰 一种除油脱白装置

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