CN115888465B - A rotary drive system suitable for long-term operation in high-temperature and high-dust flue gas - Google Patents
A rotary drive system suitable for long-term operation in high-temperature and high-dust flue gas Download PDFInfo
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- 239000000428 dust Substances 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000003546 flue gas Substances 0.000 title claims abstract description 20
- 230000007774 longterm Effects 0.000 title claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 48
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 1
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
本发明公开了一种适应高温高尘烟气长期运行的旋转驱动系统，包括电机、第一转轴、第二转轴、第三转轴、保护罩、旋转装置及烟道；保护罩的出口位于烟道内，保护罩的入口位于烟道外，电机的输出轴与第一转轴的一端相连接，第一转轴的另一端与第二转轴的一端相连接，第二转轴的另一端经保护罩的入口插入于保护罩内后与第三转轴的一端相连接，第三转轴的另一端经保护罩的出口伸出到保护罩后与旋转装置相连接，第三转轴上设置有抽气叶轮，该系统减轻传动系统的热变形，消除转轴附近出现堵灰及磨损，保证旋转机构长期稳定运行。
The present invention discloses a rotary drive system suitable for long-term operation of high-temperature and high-dust flue gas, comprising a motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a protective cover, a rotating device and a flue; the outlet of the protective cover is located in the flue, the inlet of the protective cover is located outside the flue, the output shaft of the motor is connected to one end of the first rotating shaft, the other end of the first rotating shaft is connected to one end of the second rotating shaft, the other end of the second rotating shaft is inserted into the protective cover through the inlet of the protective cover and then connected to one end of the third rotating shaft, the other end of the third rotating shaft extends out of the protective cover through the outlet of the protective cover and then connected to the rotating device, and an exhaust impeller is arranged on the third rotating shaft. The system reduces thermal deformation of the transmission system, eliminates dust blockage and wear near the rotating shaft, and ensures long-term stable operation of the rotating mechanism.
Description
技术领域Technical Field
本发明属于火电厂烟气污染物治理领域，涉及一种适应高温高尘烟气长期运行的旋转驱动系统。The invention belongs to the field of flue gas pollutant treatment in thermal power plants and relates to a rotary drive system suitable for long-term operation of high-temperature and high-dust flue gas.
背景技术Background technique
目前，我国火电厂普遍采用SCR(选择性催化还原)脱硝工艺来脱除燃料燃烧后产生的氮氧化物，由于SCR催化剂活性最佳的温度约350℃左右，因此脱硝装置一般布置在烟温约300～400℃的省煤器与空预器之间，能够满足SCR脱硝工艺的需求，但同时此处的烟尘浓度也非常高，可达几十克每立方米。一般脱硝入口烟气需要进行局部的混合和导流等措施，以达到一定的浓度和速度均匀性的要求。目前采用的方法是在烟道11内加装静态混合器，以强制烟气产生涡流、分散和混合，达到一定的混合效果，是一种依靠流体自身动能的被动混合方法，其优点是检修维护方便，不易产生故障，但静态混合器的混合效果非常有限，很多情况下无法达到大范围的充分混合。如果能够开发一种动态旋转强制混合的主动混合装置，其混合效果将可以大大改善，但其核心问题是如何确保旋转机构在高温、高烟尘环境中运行的可靠性和稳定性，如何避免其旋转部件不易堵灰、磨损和出现高温变形等，以达到能够长期稳定运行。因此迄今为止，在SCR脱硝工艺中还没有开发出相应的装置，也无应用案例。At present, my country's thermal power plants generally use SCR (selective catalytic reduction) denitrification process to remove nitrogen oxides produced after fuel combustion. Since the temperature at which the SCR catalyst is most active is about 350°C, the denitrification device is generally arranged between the economizer and the air preheater at a flue gas temperature of about 300-400°C, which can meet the needs of the SCR denitrification process. However, the smoke concentration here is also very high, reaching tens of grams per cubic meter. Generally, the flue gas at the inlet of denitrification needs to be mixed and diverted locally to achieve certain concentration and velocity uniformity requirements. The method currently used is to install a static mixer in the flue 11 to force the flue gas to produce vortexes, dispersion and mixing to achieve a certain mixing effect. It is a passive mixing method that relies on the kinetic energy of the fluid itself. Its advantages are easy maintenance and troubleshooting, and it is not easy to cause failures. However, the mixing effect of the static mixer is very limited, and in many cases, it is impossible to achieve a large range of sufficient mixing. If an active mixing device with dynamic rotation forced mixing can be developed, the mixing effect will be greatly improved, but the core problem is how to ensure the reliability and stability of the rotating mechanism in a high temperature and high smoke environment, and how to prevent its rotating parts from being blocked by dust, worn, and deformed at high temperature, so as to achieve long-term stable operation. Therefore, so far, no corresponding device has been developed in the SCR denitrification process, and there are no application cases.
发明内容Summary of the invention
本发明的目的在于克服上述现有技术的缺点，提供了一种适应高温高尘烟气长期运行的旋转驱动系统，该系统减轻传动系统的热变形，消除转轴附近出现堵灰及磨损，保证旋转机构长期稳定运行。The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a rotary drive system that can adapt to long-term operation in high-temperature and high-dust flue gas. The system reduces thermal deformation of the transmission system, eliminates dust blockage and wear near the rotating shaft, and ensures long-term stable operation of the rotating mechanism.
为达到上述目的，本发明所述的适应高温高尘烟气长期运行的旋转驱动系统包括电机、第一转轴、第二转轴、第三转轴、保护罩、旋转装置及烟道；To achieve the above-mentioned purpose, the rotary drive system adapted to long-term operation in high-temperature and high-dust flue gas of the present invention comprises a motor, a first rotating shaft, a second rotating shaft, a third rotating shaft, a protective cover, a rotating device and a flue;
保护罩的出口位于烟道内，保护罩的入口位于烟道外，电机的输出轴与第一转轴的一端相连接，第一转轴的另一端与第二转轴的一端相连接，第二转轴的另一端经保护罩的入口插入于保护罩内后与第三转轴的一端相连接，第三转轴的另一端经保护罩的出口伸出到保护罩后与旋转装置相连接，第三转轴上设置有抽气叶轮。The outlet of the protective cover is located in the flue, and the inlet of the protective cover is located outside the flue. The output shaft of the motor is connected to one end of the first rotating shaft, and the other end of the first rotating shaft is connected to one end of the second rotating shaft. The other end of the second rotating shaft is inserted into the protective cover through the inlet of the protective cover and then connected to one end of the third rotating shaft. The other end of the third rotating shaft extends out of the protective cover through the outlet of the protective cover and is connected to the rotating device. An exhaust impeller is arranged on the third rotating shaft.
保护罩与第二转轴及第三转轴之间通过支架相连接。The protective cover is connected to the second rotating shaft and the third rotating shaft through a bracket.
电机的输出轴与第一转轴之间通过联轴器相连接。The output shaft of the motor is connected to the first rotating shaft via a coupling.
电机的输出轴及第一转轴位于所述轴承座上。The output shaft and the first rotating shaft of the motor are located on the bearing seat.
支架与第一转轴及第二转轴之间均设置有轴承。Bearings are arranged between the bracket and the first rotating shaft and the second rotating shaft.
保护罩的入口处设置有过滤网。A filter screen is arranged at the entrance of the protective cover.
所述保护罩为┏形结构。The protective cover is a ┏-shaped structure.
第一转轴与第二转轴之间和第二转轴与第三转轴之间均通过齿轮组相连接。The first rotating shaft and the second rotating shaft, and the second rotating shaft and the third rotating shaft are connected via a gear set.
本发明具有以下有益效果：The present invention has the following beneficial effects:
本发明所述的适应高温高尘烟气长期运行的旋转驱动系统在具体操作时，电机带动抽气叶轮转动，使得外界空气通过所述保护罩，通过外界空气对传动系统进行冷却，同时避免烟道中的烟气进入到保护罩内，消除转轴附近出现堵灰及磨损，保证旋转机构长期稳定运行，解决传动系统的自冷却和自屏蔽烟尘问题，为进一步开发出高温高尘环境动态旋转搅拌混合装置提供了核心技术支持。During specific operation, the rotary drive system adapted to long-term operation in high-temperature and high-dust flue gas described in the present invention drives the exhaust impeller to rotate by a motor, so that outside air passes through the protective cover, and the transmission system is cooled by the outside air. At the same time, smoke in the flue is prevented from entering the protective cover, and dust blockage and wear near the rotating shaft are eliminated, thereby ensuring long-term and stable operation of the rotating mechanism, solving the self-cooling and self-shielding smoke problems of the transmission system, and providing core technical support for the further development of a dynamic rotary stirring and mixing device in a high-temperature and high-dust environment.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明的结构示意图。FIG1 is a schematic structural diagram of the present invention.
其中，1为电机、2为轴承座、3为联轴器、4为齿轮组、5为支架、6为轴承、71为第一转轴、72为第二转轴、73为第三转轴、8为保护罩、9为抽气叶轮、10为旋转装置、11为烟道、12为过滤网。Among them, 1 is a motor, 2 is a bearing seat, 3 is a coupling, 4 is a gear set, 5 is a bracket, 6 is a bearing, 71 is a first rotating shaft, 72 is a second rotating shaft, 73 is a third rotating shaft, 8 is a protective cover, 9 is an exhaust impeller, 10 is a rotating device, 11 is a flue, and 12 is a filter.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明方案，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的实施例，不是全部的实施例，而并非要限制本发明公开的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要的混淆本发明公开的概念。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.
在附图中示出了根据本发明公开实施例的结构示意图。这些图并非是按比例绘制的，其中为了清楚表达的目的，放大了某些细节，并且可能省略了某些细节。图中所示出的各种区域、层的形状及它们之间的相对大小、位置关系仅是示例性的，实际中可能由于制造公差或技术限制而有所偏差，并且本领域技术人员根据实际所需可以另外设计具有不同形状、大小、相对位置的区域/层。The accompanying drawings show schematic diagrams of structures according to embodiments disclosed in the present invention. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions/layers with different shapes, sizes, and relative positions according to actual needs.
参考图1，本发明所述的适应高温高尘烟气长期运行的旋转驱动系统包括电机1、轴承座2、联轴器3、齿轮组4、支架5、轴承6、第一转轴71、第二转轴72、第三转轴73、保护罩8、抽气叶轮9、旋转装置10、烟道11及过滤网12；1 , the rotary drive system adapted to long-term operation in high-temperature and high-dust flue gas of the present invention comprises a motor 1, a bearing seat 2, a coupling 3, a gear set 4, a bracket 5, a bearing 6, a first rotating shaft 71, a second rotating shaft 72, a third rotating shaft 73, a protective cover 8, an exhaust impeller 9, a rotating device 10, a flue 11 and a filter 12;
保护罩8的出口位于烟道11内，保护罩8的入口位于烟道11外，电机1的输出轴与第一转轴71的一端相连接，第一转轴71的另一端与第二转轴72的一端相连接，第二转轴72的另一端经保护罩8的入口插入于保护罩8内后与第三转轴73的一端相连接，第三转轴73的另一端经保护罩8的出口伸出到保护罩8后与旋转装置10相连接，保护罩8的入口处设置有过滤网12；The outlet of the protective cover 8 is located in the flue 11, and the inlet of the protective cover 8 is located outside the flue 11. The output shaft of the motor 1 is connected to one end of the first rotating shaft 71, and the other end of the first rotating shaft 71 is connected to one end of the second rotating shaft 72. The other end of the second rotating shaft 72 is inserted into the protective cover 8 through the inlet of the protective cover 8 and then connected to one end of the third rotating shaft 73. The other end of the third rotating shaft 73 extends out of the protective cover 8 through the outlet of the protective cover 8 and then connected to the rotating device 10. A filter screen 12 is provided at the inlet of the protective cover 8.
电机1的输出轴与第一转轴71之间通过联轴器3相连接，电机1的输出轴及第一转轴71位于所述轴承座2上，第一转轴71与第二转轴72之间和第二转轴72与第三转轴73之间均通过齿轮组4相连接。The output shaft of the motor 1 is connected to the first rotating shaft 71 via a coupling 3. The output shaft of the motor 1 and the first rotating shaft 71 are located on the bearing seat 2. The first rotating shaft 71 and the second rotating shaft 72 and the second rotating shaft 72 and the third rotating shaft 73 are connected via a gear set 4.
保护罩8与第二转轴72及第三转轴73之间通过支架5相连接，其中，支架5与第一转轴71及第二转轴72之间均设置有轴承6，第三转轴73上设置有抽气叶轮9，所述保护罩8为┏形结构。The protective cover 8 is connected to the second rotating shaft 72 and the third rotating shaft 73 through the bracket 5, wherein bearings 6 are arranged between the bracket 5 and the first rotating shaft 71 and the second rotating shaft 72, and an exhaust impeller 9 is arranged on the third rotating shaft 73, and the protective cover 8 is a ┏-shaped structure.
本发明的具体工作过程为：The specific working process of the present invention is:
启动电机1，电机1经第一转轴71、第二转轴72及第三转轴73带动抽气叶轮9及旋转装置10工作，抽气叶轮9转动，使得外界空气经过滤网12过滤后进入到保护罩8内，再穿过保护罩8后从保护罩8的出口排出，并吹扫到旋转装置10上，在此过程中，通过外界空气对第一转轴71、第二转轴72、第三转轴73、抽气叶轮9及旋转装置10进行吹扫及降温，以减轻传动系统的热变形，同时避免烟气进入到保护罩8内，避免转轴附近出现堵灰及磨损，保证旋转机构长期稳定运行。Start the motor 1, and the motor 1 drives the exhaust impeller 9 and the rotating device 10 to work via the first rotating shaft 71, the second rotating shaft 72 and the third rotating shaft 73. The exhaust impeller 9 rotates, so that the outside air enters the protective cover 8 after being filtered by the filter screen 12, and then passes through the protective cover 8 and is discharged from the outlet of the protective cover 8 and blown onto the rotating device 10. In this process, the first rotating shaft 71, the second rotating shaft 72, the third rotating shaft 73, the exhaust impeller 9 and the rotating device 10 are purged and cooled by the outside air to reduce the thermal deformation of the transmission system, while preventing the smoke from entering the protective cover 8, avoiding dust blockage and wear near the rotating shaft, and ensuring the long-term stable operation of the rotating mechanism.
需要说明的是，本发明中的保护罩8起到三个作用：一是作为内部支架5的固定端，保持内部轴系的位置；二是可以保护内部的传动构件不与烟气直接接触，防止受到烟尘磨损；三是可以提供一个空气可以进入的通道，以提供冷却风进入，过滤网12起到过滤空气的作用，防止杂物吸入保护罩8中。It should be noted that the protective cover 8 in the present invention has three functions: first, it serves as the fixed end of the internal bracket 5 to maintain the position of the internal shaft system; second, it can protect the internal transmission components from direct contact with the flue gas and prevent them from being worn by smoke and dust; third, it can provide a channel for air to enter to provide cooling wind to enter, and the filter screen 12 plays the role of filtering the air to prevent debris from being sucked into the protective cover 8.
本发明中的抽气叶轮9作用为：一方面对轴、轴承6、齿轮组等构件进行冷却，另一方面将冷却空气从保护罩8的出口喷射入烟气，可以将烟气中的烟尘吹离保护罩8的出口，防止烟尘进入传动系统，对内构件产生磨损，起到隔绝烟尘的作用。The functions of the exhaust impeller 9 in the present invention are: on the one hand, to cool the shaft, bearing 6, gear set and other components; on the other hand, to spray cooling air into the flue gas from the outlet of the protective cover 8, so as to blow the smoke in the smoke away from the outlet of the protective cover 8, prevent the smoke from entering the transmission system and causing wear to the internal components, thereby isolating the smoke.
Claims (7)
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| CN213528139U (en) * | 2020-07-17 | 2021-06-25 | 西安西矿环保科技有限公司 | Vortex structure and flue gas denitration mixing arrangement |
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| CN115888465A (en) | 2023-04-04 |
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