WO2020029039A1 - 低温含尘尾气在线清灰除尘装置 - Google Patents

低温含尘尾气在线清灰除尘装置 Download PDF

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Publication number
WO2020029039A1
WO2020029039A1 PCT/CN2018/099052 CN2018099052W WO2020029039A1 WO 2020029039 A1 WO2020029039 A1 WO 2020029039A1 CN 2018099052 W CN2018099052 W CN 2018099052W WO 2020029039 A1 WO2020029039 A1 WO 2020029039A1
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dust
furnace wall
mesh
driving wheel
driven wheel
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English (en)
French (fr)
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刘祥斌
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Jiangsu Dongjiu Heavy Industry Co Ltd
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Jiangsu Dongjiu Heavy Industry Co Ltd
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Priority to PCT/CN2018/099052 priority Critical patent/WO2020029039A1/zh
Publication of WO2020029039A1 publication Critical patent/WO2020029039A1/zh
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases
    • F27D17/22—Arrangements for treatment or cleaning of waste gases for removing solid constituents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to an on-line ash and dust removal device for low-temperature dust-containing exhaust gas, and belongs to the technical field of low-temperature waste heat recovery.
  • the extended heating surface of the waste heat boiler cannot be used.
  • the heating surface of the boiler layout is large, and the boiler structure is large; Material, which increases the heat resistance of the heat transfer, resulting in a large heating surface.
  • the invention aims at the shortcomings of the prior art and provides an on-line ash and dust removal device for low-temperature dust-containing exhaust gas, which can remove most of the dust in the exhaust gas without affecting the low-temperature exhaust gas waste heat, and ensure the safe and normal operation of the waste heat recovery device.
  • An on-line ash and dust removal device for low-temperature dust-containing exhaust gas includes a furnace wall disposed in a cavity, and the furnace wall is provided with a furnace wall smoke inlet and a furnace wall smoke outlet; and a net-shaped dust catching device is provided.
  • the device is arranged near the smoke inlet of the furnace wall.
  • the mesh dust catching device includes a mesh dust catching belt, a driving device, a driving wheel and a driven wheel.
  • the driving wheel and the driven wheel are respectively supported on the outside of the furnace wall through a bracket, and the driving wheel It is connected with the output end of the driving device; the mesh dust catching belt is wound around the periphery of the driving wheel and the driven wheel; at the same time, the driving wheel and the driven wheel are placed in a sealed cavity which is sealed with the wall surface of the furnace wall.
  • the inner wall of the sealing cavity on the driven wheel side is connected to the dust cleaning device, and a slag removal port is provided on the side sealing cavity.
  • the cleaning device is a steel brush, and the brush head of the steel brush is provided facing the mesh dust catching belt; or the cleaning device is a high-pressure water washing device, and the nozzle of the high-pressure water cleaning device is installed on the inner wall of the sealed cavity; or the cleaning device is a compressed air washing device The nozzle of the compressed air flushing device is installed on the inner wall of the sealed cavity.
  • the mesh-shaped dust-trapping belt is composed of a filter layer composed of multiple layers of wire mesh; the mesh-shaped dust-trapping belt is arranged perpendicular to the flow direction of the flue gas in the furnace wall.
  • the temperature drop of the smoke is small, and generally does not exceed 10 ° C;
  • the smoke resistance is small, and generally does not exceed 300Pa;
  • FIG. 1 is a schematic structural diagram of the present invention
  • furnace wall 1 furnace cavity heating surface 11; driving device 2; driving wheel 3; mesh dust catching belt 4; dust cleaning device 5; driven wheel 6;
  • the low-temperature dust-containing exhaust gas on-line ash and dust removal device of the present invention includes a cavity wall provided with a cavity wall, the furnace wall is provided with a furnace wall smoke inlet and a furnace wall smoke outlet; and a net-shaped dust trap is also included.
  • the net-shaped dust catching device is arranged near the smoke inlet of the furnace wall.
  • the net-shaped dust catching device includes a net-like dust catching belt, a driving device, a driving wheel, and a driven wheel. The driving wheel and the driven wheel are respectively supported by the brackets.
  • the outer side of the furnace wall, and the driving wheel is connected to the output end of the driving device; a mesh dust trap belt is wound around the periphery of the driving wheel and the driven wheel; at the same time, the driving wheel and the driven wheel are placed in a sealed cavity, which is connected with the furnace wall.
  • the inner wall of the sealing cavity on the driven wheel side is connected to the dust cleaning device, and a slag removal port is provided on the side sealing cavity.
  • the cleaning device is a steel brush, and the brush head of the steel brush is provided facing the mesh dust catching belt; or the cleaning device is a high-pressure water washing device, and the nozzle of the high-pressure water cleaning device is installed on the inner wall of the sealed cavity; or the cleaning device is a compressed air washing device The nozzle of the compressed air flushing device is installed on the inner wall of the sealed cavity.
  • the mesh-shaped dust-trapping belt is composed of a filter layer composed of multiple layers of wire mesh; the mesh-shaped dust-trapping belt is arranged perpendicular to the flow direction of the flue gas in the furnace wall.
  • the driving device is composed of a motor, a reduction device and a transmission device. It is arranged outside the flue and is not affected by exhaust gas.
  • the transmission device is generally arranged on the top of the equipment and can be arbitrarily arranged according to the actual situation on site.
  • the cleaning device is arranged in the flue.
  • different cleaning methods are set according to the characteristics of the dust, such as: steel brushes, water washing, compressed air washing, or a combination of several methods;
  • the mesh dust trap belt is composed of multiple layers of wire mesh, which is selected according to the nature of the ash Different screens;
  • the filter layer is arranged perpendicular to the exhaust gas flow direction, and the filter layer fills the entire cross-sectional area of the flue gas flow.
  • the dust-containing exhaust gas at a temperature of about 400 ° C is passed through the mesh dust catch belt at a low speed, and the dust in the exhaust gas is captured by the filter of the mesh dust catch belt; the mesh dust catch belt is driven on the cross section of the flue by the driving device.
  • Rotate when the net-like dust trap belt containing dust is run to the cleaning device outside the flue, perform the ash cleaning treatment, and the net-like dust trap belt after turning the dust is rotated into the flue to capture dust; during the running process Adjust the rotation speed according to the characteristics of the ash and the amount of ash.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Cleaning In General (AREA)

Abstract

本发明公开了一种低温含尘尾气在线清灰除尘装置，包括呈空腔设置的炉墙以及网状捕尘装置，炉墙设置有炉墙进烟口和炉墙出烟口；网状捕尘装置靠近炉墙进烟口设置，该网状捕尘装置包括网状捕尘带、驱动装置、主动轮以及从动轮，所述主动轮和从动轮分别通过支架相对地支撑在炉墙的外侧，且主动轮与驱动装置的输出端连接；网状捕尘带绕在主动轮和从动轮的外围；同时主动轮以及从动轮置于密封腔内，该密封腔与炉墙的壁面封接。本发明可以在不影响低温尾气余热的前提下，清除尾气中大部分灰尘，确保余热回收装置安全、正常运行。

Description

低温含尘尾气在线清灰除尘装置 技术领域
本发明涉及一种低温含尘尾气在线清灰除尘装置，属于低温余热回收技术领域。
背景技术
随着节能减排政策的进一步深入，一些低温(温度在400℃左右)含尘尾气的余热得到了利用，在利用这些尾气时，普遍存在以下问题：
1、由于尾气中存在有大量的粉尘，各种粉尘的性质不一样，导致受热面管积灰严重，严重阻碍了余热回收；例如：硅铁矿热炉烟气中含有大量二氧化硅粉尘，导致受热面积灰严重，现有余热锅炉都不能正常投入运行。
2、由于尾气中含有大量的粉尘，特别对低温尾气，余热锅炉不能采用扩展受热面，锅炉布置受热面大，锅炉结构庞大；例如：转底炉余热烟气在低温段时会析出一种油性物质，增加换热热阻，导致受热面庞大。
3、在余热回收装置之间设置常用的除尘装置，例如：重力或旋风除尘器分离效果差，电除尘设备投资大、温降大，布袋除尘器耐温不高；而且这些设备都存在设备阻力大的问题；对于黏结性和吸附性灰无法处理，需定期停炉清理。如果能有效解决这些问题，将进一步推动低温含尘尾气的余热利用，产生更大的经济和社会效益。
发明内容
本发明针对现有技术的不足，提供一种低温含尘尾气在线清灰除尘装置，在不影响低温尾气余热的前提下，清除尾气中大部分灰尘，确保余热回收装置安全、正常运行。
为实现以上的技术目的，本发明将采取以下的技术方案：
一种低温含尘尾气在线清灰除尘装置，包括呈空腔设置的炉墙，炉墙设置有炉墙进烟口和炉墙出烟口；还包括网状捕尘装置，该网状捕尘装置靠近炉墙进烟口设置，网状捕尘装置包括网状捕尘带、驱动装置、主动轮以及从动轮，主动 轮和从动轮分别通过支架相对地支撑在炉墙的外侧，且主动轮与驱动装置的输出端连接；网状捕尘带绕在主动轮和从动轮的外围；同时主动轮以及从动轮置于密封腔内，该密封腔与炉墙的壁面封接。从动轮侧的密封腔的内壁与清尘装置连接，且该侧密封腔上设置有除渣口。清理装置为钢刷，钢刷的刷头面向网状捕尘带设置；或者清理装置为高压水冲洗装置，该高压水清洗装置的喷头安装在密封腔的内壁；或者清理装置为压缩空气冲洗装置，该压缩空气冲洗装置的喷头安装在密封腔的内壁。网状捕尘带采用由多层丝网组成的过滤层构成；该网状捕尘带垂直于炉墙中的烟气流动方向设置。
根据以上的技术方案，可以实现以下的有益效果：
1、在线清除尾气中黏结性和吸附性灰，保证装置连续运行，确保经济和社会效益；
2、烟气通过本装置时，烟气温降小，一般不超过10℃；
3、烟气通过本装置时，烟气阻力小，一般不超过300Pa；
4、在不停炉的情况下，将尾气中黏结性和吸附性灰进行清除，而且尾气的温降小，阻力降小。
附图说明
图1是本发明的结构示意图；
其中：炉墙1；炉腔受热面11；驱动装置2；主动轮3；网状捕尘带4；清尘装置5；从动轮6；
具体实施方式
附图非限制性地公开了本发明所涉及优选实施例的结构示意图；以下将结合附图详细地说明本发明的技术方案。
如图1所示，本发明的低温含尘尾气在线清灰除尘装置，包括呈空腔设置的炉墙，炉墙设置有炉墙进烟口和炉墙出烟口；还包括网状捕尘装置，该网状捕尘装置靠近炉墙进烟口设置，该网状捕尘装置包括网状捕尘带、驱动装置、主动轮以及从动轮、主动轮和从动轮分别通过支架相对地支撑在炉墙的外侧，且主动轮与驱动装置的输出端连接；网状捕尘带绕在主动轮和从动轮的外 围；同时主动轮以及从动轮置于密封腔内，该密封腔与炉墙的壁面封接。从动轮侧的密封腔的内壁与清尘装置连接，且该侧密封腔上设置有除渣口。清理装置为钢刷，钢刷的刷头面向网状捕尘带设置；或者清理装置为高压水冲洗装置，该高压水清洗装置的喷头安装在密封腔的内壁；或者清理装置为压缩空气冲洗装置，该压缩空气冲洗装置的喷头安装在密封腔的内壁。网状捕尘带采用由多层丝网组成的过滤层构成；该网状捕尘带垂直于炉墙中的烟气流动方向设置。驱动装置由电机、减速装置和传动装置组成；布置在烟道之外，不受尾气冲刷，传动装置一般布置在设备的顶部，也可根据现场的实际情况进行任意布置；清理装置布置在烟道之外，根据灰尘的特性设置不同的清理方式，如：钢刷、水冲洗、压缩空气冲洗等或几种方式的结合体；网状捕尘带由多层丝网组成，根据灰的性质选择不同的丝网；过滤层垂直于尾气流动方向布置，过滤层充满整个烟气流通截面积。使用时，将温度在400℃左右的含尘尾气低速通过网状捕尘带，尾气中灰尘被网状捕尘带的滤网捕捉；网状捕尘带在驱动装置带动下在烟道截面上进行转动，当含有灰尘的网状捕尘带运行到烟道之外的清理装置时，进行清灰处理，清灰过后的网状捕尘带又转动到烟道中进行捕捉灰尘；在运行过程中根据灰的特性和灰量的大小进行转速调整。

Claims (4)

  1. 一种低温含尘尾气在线清灰除尘装置，包括呈空腔设置的炉墙，炉墙设置有炉墙进烟口和炉墙出烟口；其特征在于：还包括网状捕尘装置，网状捕尘装置靠近炉墙进烟口设置，该网状捕尘装置包括网状捕尘带、驱动装置、主动轮以及从动轮，主动轮和从动轮分别通过支架相对地支撑在炉墙的外侧，且主动轮与驱动装置的输出端连接；网状捕尘带绕在主动轮和从动轮的外围；同时主动轮以及从动轮置于密封腔内，该密封腔与炉墙的壁面封接。
  2. 根据权利要求1的低温含尘尾气在线清灰除尘装置，其特征在于：从动轮侧的密封腔的内壁与清尘装置连接，且该侧密封腔上设置有除渣口。
  3. 根据权利要求2的低温含尘尾气在线清灰除尘装置，其特征在于：清理装置为钢刷，钢刷的刷头面向网状捕尘带设置；或者清理装置为高压水冲洗装置，该高压水清洗装置的喷头安装在密封腔的内壁；或者清理装置为压缩空气冲洗装置，该压缩空气冲洗装置的喷头安装在密封腔的内壁。
  4. 根据权利要求1的低温含尘尾气在线清灰除尘装置，其特征在于：网状捕尘带采用由多层丝网组成的过滤层构成；该网状捕尘带垂直于炉墙中的烟气流动方向设置。
PCT/CN2018/099052 2018-08-06 2018-08-06 低温含尘尾气在线清灰除尘装置 Ceased WO2020029039A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000018886A (ja) * 1998-06-30 2000-01-18 Furukawa Co Ltd 熱交換器のダスト清掃装置
CN2467162Y (zh) * 2001-01-14 2001-12-26 于巍 三级脱硫除尘器
CN2573057Y (zh) * 2002-08-26 2003-09-17 胡继杰 高压水雾、滤网除尘设备
CN102401572A (zh) * 2011-11-03 2012-04-04 盐城市锅炉制造有限公司 低温含尘尾气在线清灰除尘装置
CN202304459U (zh) * 2011-11-03 2012-07-04 盐城市锅炉制造有限公司 低温含尘尾气在线清灰除尘装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000018886A (ja) * 1998-06-30 2000-01-18 Furukawa Co Ltd 熱交換器のダスト清掃装置
CN2467162Y (zh) * 2001-01-14 2001-12-26 于巍 三级脱硫除尘器
CN2573057Y (zh) * 2002-08-26 2003-09-17 胡继杰 高压水雾、滤网除尘设备
CN102401572A (zh) * 2011-11-03 2012-04-04 盐城市锅炉制造有限公司 低温含尘尾气在线清灰除尘装置
CN202304459U (zh) * 2011-11-03 2012-07-04 盐城市锅炉制造有限公司 低温含尘尾气在线清灰除尘装置

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