WO2017080507A1 - 一种脱硫除雾器内烟气流速的调节方法和装置 - Google Patents

一种脱硫除雾器内烟气流速的调节方法和装置 Download PDF

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Publication number
WO2017080507A1
WO2017080507A1 PCT/CN2016/105459 CN2016105459W WO2017080507A1 WO 2017080507 A1 WO2017080507 A1 WO 2017080507A1 CN 2016105459 W CN2016105459 W CN 2016105459W WO 2017080507 A1 WO2017080507 A1 WO 2017080507A1
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desulfurization
flue gas
shaft
flow rate
baffle
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PCT/CN2016/105459
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English (en)
French (fr)
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徐凤琦
郭明春
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上海霍林环保工程设备有限公司
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Priority claimed from CN201510766936.XA external-priority patent/CN106669351A/zh
Priority claimed from CN201520896391.XU external-priority patent/CN205145911U/zh
Application filed by 上海霍林环保工程设备有限公司 filed Critical 上海霍林环保工程设备有限公司
Publication of WO2017080507A1 publication Critical patent/WO2017080507A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
    • B01D51/10—Conditioning the gas to be cleaned

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  • the invention belongs to the technical field of a defogger, and particularly relates to a method and a device for adjusting the flow rate of a flue gas in a desulfurization and demisters.
  • Flue gas produced after combustion of coal-fired boilers contains a variety of harmful substances, which contains NO x, SO 2, dust and the like. In order to remove harmful substances, it is removed by a desulfurization and denitration system process.
  • mist droplets After the flue gas passes through the desulfurization process, many mist droplets are generated, and a part of the dust is also entrained in the mist droplets, which are introduced into the flue gas along with the flue gas flow, and are directly discharged into the atmospheric environment, and have a large desulfurization back-end equipment and chimney. Corrosive and discharged into the atmosphere to form secondary pollution.
  • a mist eliminator is installed at the outlet of the smoke mist in the desulfurization system.
  • the mist eliminator removes the droplets by physical methods, namely gravity, inertial force, centrifugal force, water film, and the like.
  • the basic parameters of the performance design are the flue gas flow rate through the demisters, and the flue gas flow rate at 100% load is the demister design basis.
  • the demisting performance of the mist eliminator and the defogging efficiency are directly related to the flue gas flow rate.
  • the high demisting efficiency requires the flue gas flow rate to be within a certain suitable range, the flue gas flow rate is too low or too high, and the demisting efficiency is high. Will drop, will not meet the export removal fog indicator standards.
  • a baffle plate type or a swirl plate type mist eliminator is used, which is a static device, and the optimal working state of the device is adapted to the flow rate of the flue gas in the range of 3.3 to 3.8 m/s. In the interval, the device itself cannot adjust any parameters to adapt to changes in the flue gas condition.
  • the use of wet electrostatic precipitator has strict requirements on the droplet content at the front end, and the power consumption is huge.
  • the object of the present invention is to provide a method and a device for adjusting the flow rate of the flue gas in the desulfurization and demisters according to the above problems, and to meet the flow rate of the flue gas in the range of 3.3 to 3.8 m/s, so that the demisters can achieve the demisting efficiency. High purpose.
  • a method for adjusting a flow rate of a flue gas in a desulfurization and mist eliminator characterized in that a plurality of openable and closable baffles are arranged in a direction perpendicular to the flow of the flue gas before, after or in the front or rear portion of the desulfurization demister, and The plurality of baffles are located on the same plane, and the flow area of the flue gas in the desulfurization and demisters is adjusted by controlling the number of opening and closing of the baffles to achieve adjustment of the flue gas flow rate.
  • the opening and closing action of the baffle is realized by a manual or automatic driving mechanism driving a shaft connected to the bottom center of the baffle.
  • the number of opening and closing of the baffle is performed by a manual or automatic driving mechanism according to a load parameter change of a coal-fired boiler operating condition.
  • a device for adjusting a flow rate of a flue gas in a desulfurization and demisters characterized in that the method for adjusting a flow rate of a flue gas in a desulfurization and demisters is used, comprising:
  • baffle plate mounted in a front, rear or front or rear portion of the desulfurization demister in a direction perpendicular to the flow of the flue gas
  • the shaft is installed at the center of the bottom surface of the baffle and extends outside the desulfurization demister;
  • a manual or automatic drive mechanism connected to an end of the shaft located outside the desulfurization demister through a link mechanism;
  • the manual or automatic driving mechanism drives the linkage mechanism to act, thereby driving the shaft to rotate, so that the baffle is turned around the shaft, and the flow area of the flue gas in the desulfurization and demisters is controlled to realize the adjustment of the flue gas flow rate. .
  • the baffle is mounted on the front, rear or front or rear portion of the desulfurization demister through the shaft support;
  • the shaft support is a frame structure composed of two fixed rods and two mounting rods, two The fixing rods are suspended parallel to each other on the inner wall of the desulfurization demister, and the two mounting rods are vertically connected between the two fixing rods;
  • the baffle is disposed on the two fixing rods and the two mounting rods Inside the frame, the shaft is connected to two mounting rods and a baffle between the two mounting rods, and the baffle is installed in the front, rear or front or rear portion of the desulfurization demister.
  • the shaft is connected to the two mounting rods by a shaft supporting bearing fixed on the two mounting rods respectively.
  • the shaft is further reinforced by a fixing bracket mounted on the outer wall of the desulfurization demister;
  • the fixing frame comprises two support rods and one connecting rod, and the two supporting rods are respectively located on both sides of the shaft and the shaft
  • the rod is fixed in parallel on the outer wall of the desulfurization demister, and the connecting rod is vertically connected between the ends of the two support rods; the end of the shaft passes through the connecting rod and passes through the link mechanism and the manual or automatic driving mechanism Connected.
  • a baffle perpendicular to the flow direction of the flue gas may be locally installed, and the pressure difference between the sides of the desulfurization demister may be adjusted by controlling the number of opening and closing of the baffle to control the passage
  • the flue gas flow of the desulfurization and demisting device changes, and the flue gas flow rate is operated in the range of 3.3 to 3.8 m/s, so that the desulfurization and demisters can reach the highest efficiency of demisting.
  • FIG. 1 is a top plan view of an adjusting device for installing a flue gas flow rate in a circular desulfurization mist eliminator.
  • Figure 2 is a partial enlarged view of Figure 1.
  • Fig. 3 is a side structural view showing an adjusting device for installing a flue gas flow rate in a square desulfurization mist eliminator.
  • a method for adjusting a flue gas flow rate in a desulfurization mist eliminator wherein a plurality of openable and baffable baffles are arranged in a direction perpendicular to the flow of the flue gas in front of or behind the front or rear portion of the desulfurization demister, and a plurality of baffles are located On the same plane, the flow area of the flue gas in the desulfurization demister is adjusted by controlling the number of opening and closing of the baffle to achieve the adjustment of the flue gas flow rate.
  • the opening and closing action of the baffle is realized by a manual or automatic driving mechanism driving the shaft connected to the bottom center of the baffle; and the opening and closing quantity of the baffle is controlled by a manual or automatic driving mechanism according to the load condition of the coal-fired boiler operating condition. Change execution.
  • the adjusting device of the flue gas flow rate in the desulfurization and demisters can be designed by using the method for adjusting the flue gas flow rate in the desulfurization and demisters, as shown in FIG. 1 and FIG. 2, including the baffle 1, the shaft 2 and the manual. Or automatic drive mechanism 3.
  • the baffle 1 is mounted to the front, rear or front or rear portion of the desulfurization demister through the shaft support 5 in a direction perpendicular to the flow of the flue gas.
  • the shaft support base 5 is a frame structure composed of two fixing rods 51 and two mounting rods 52.
  • the two fixing rods 51 are suspended parallel to each other on the inner wall of the desulfurization and demister, and the two mounting rods 52 are They are vertically connected between the two fixing rods 51, respectively.
  • the baffle 1 is mounted by a shaft 2 in a frame composed of two fixing rods 51 and two mounting rods 52.
  • the connection between the shaft 2 and the baffle 1 and the two mounting rods 52 is specifically: the shaft 2 is mounted at the center of the bottom surface of the baffle 1 between the two mounting rods 52, and is fixed to the two mounting rods 52 respectively.
  • the shaft support bearing 6 is connected with two mounting rods 52, and one end of the shaft 2 extends to desulfurization and defogging Outside the device, the end of the shaft 2 outside the desulfurization demister is also connected to the manual or automatic drive mechanism 3 via a linkage mechanism 4.
  • the shaft 2 is further passed through a fixing frame 7 mounted on the outer wall of the desulfurization demister.
  • the fixing frame 7 specifically includes two supporting rods 71 and a connecting rod 72.
  • the two supporting rods 71 are respectively located on two sides of the shaft rod 2 and are fixed in parallel with the shaft rod 2 on the outer wall of the desulfurization and demister, and the connecting rod 72 It is then vertically connected between the ends of the two support rods 71.
  • the end of the shaft 2 passes through the connecting rod 72 and is connected to the manual or automatic drive mechanism 3 via the link mechanism 4.
  • the device drives the link mechanism 4 by the manual or automatic drive mechanism 3, thereby driving the shaft 2 to rotate, so that the baffle 1 is turned around the shaft 2 to obtain the purpose of controlling the flow area of the flue gas in the desulfurization demister. To achieve adjustment of the flue gas flow rate.
  • the automatic drive mechanism 3 can specifically adopt an electric actuator.
  • a plurality of mutually parallel fixing rods 51 are usually suspended on the inner wall of the desulfurization demister, and then the connecting rod 52 is vertically connected between the connecting fixing rods 51.
  • two baffles 1 are mounted side by side in each of the shaft support seats 5 of the frame structure composed of the fixed rod 51 and the mounting rod 52, and the shafts 2 respectively connected to the two side baffles 1 are connected by the connecting rods
  • the mechanism 4 is connected to a manual or automatic drive mechanism 3 such that each manual or automatic drive mechanism 3 can simultaneously control the flipping of the two flaps 1.
  • the baffle 1 functions as a damper; when the manual or automatic drive mechanism 3 drives the two baffles 1 to be turned over, it is equivalent to opening the wind. When the manual or automatic drive mechanism 3 does not operate, the two baffles 1 remain side by side, which is equivalent to closing the damper.
  • the number of the baffles 1 installed depends on the specific conditions, and is generally installed in front of or behind the desulfurization and demisters, or in front of or behind the parts (including baffle type or swirl plate type mist eliminator), and the baffle 1 can cover all or part of several An area where the flow area can be adjusted. As shown in Fig. 1, in order to symmetrically install the baffle 1 in front of and behind the desulfurization demister, the baffle 1 in the figure covers a portion of the desulfurization demister that has a plurality of adjustable flow areas.
  • the load parameter change of the operating condition of the coal-fired boiler is given an execution value, and the manual or automatic drive mechanism 3 performs value information according to the obtained load parameter to cause the baffle 1 to be fully or partially inverted to adjust the inside of the desulfurization defogger.
  • the flow area of the flue gas flow can control the flue gas flow rate in the desulfurization demister to operate in the range of 3.3 to 3.8 m/s, and achieve the highest efficiency of defogging of the desulfurization and demisters.
  • the baffle 1 on the left side is in a closed state, that is, the damper is closed; the baffle 1 on the right side is in a reversed state, that is, the damper is opened.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

一种脱硫除雾器内烟气流速的调节方法和装置，通过在脱硫除雾器内的前后或者前或者后部位沿垂直于烟气流动的方向设置若干可开闭的挡板（1），且挡板（1）位于同一平面上，通过控制挡板（1）的开闭数量调节脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。

Description

一种脱硫除雾器内烟气流速的调节方法和装置 技术领域
本发明属于一种除雾器技术领域，特别涉及一种脱硫除雾器内烟气流速的调节方法和装置。
背景技术
燃煤锅炉燃烧后产生的烟气中含有多种有害物质，其中含有NOx、SO2、粉尘等。为了去除有害物质，采用脱硫、脱硝系统工艺对其进行去除。
烟气经过脱硫工艺后，产生许多雾滴，其中雾滴中也夹带一部分粉尘，都会随着烟气气流带入烟道中，直接排入大气环境中，对脱硫后端设备及烟囱有很大的腐蚀性和排入大气中形成二次污染。为了解决雾滴的腐蚀性和二次污染问题，在脱硫系统中的烟气雾滴出口处安装了除雾器。
除雾器是利用物理方法，即重力、惯性力、离心力、水膜等对雾滴进行去除。性能设计的基础性参数为通过除雾器的烟气流速，而且是以100％负荷的烟气流速为除雾器设计基准。除雾器的除雾性能的发挥和除雾效率的高低与烟气流速有着直接关系，除雾效率高就要求烟气流速在一定的适合区间，烟气流速过低或过高，除雾效率都会下降，都会不满足出口去除雾滴指标标准。
现有的烟气脱硫除雾技术中，采用的是折流板式或旋流板式除雾器，它们是一种静态设备，设备的最佳工作状态适应烟气流速在3.3～3.8m/s范围区间，这种设备自身不能调节任何参数来适应烟气工况的变化。而采用湿式电除尘，对前端的雾滴含量有着严格要求，且功耗巨大。
发明内容
本发明的目的在于针对上述问题，提供了一种脱硫除雾器内烟气流速的调节方法和装置,满足烟气流速在3.3～3.8m/s范围区间运行，使除雾器达到除雾效率高的目的。
本发明的目的是这样实现的：
一种脱硫除雾器内烟气流速的调节方法，其特征在于，在脱硫除雾器内的前后或者前或者后部位沿垂直于烟气流动的方向设置若干可开闭的挡板，且所述若干挡板位于同一平面上，通过控制挡板的开闭数量调节脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。
其中，所述挡板的开闭动作通过手动或自动驱动机构驱动与挡板的底部中心相连的轴杆实现。
其中，所述挡板的开闭数量由手动或自动驱动机构根据燃煤锅炉运行工况的负荷参数变化执行。
一种脱硫除雾器内烟气流速的调节装置，其特征在于，使用前述的一种脱硫除雾器内烟气流速的调节方法，包括：
挡板，沿垂直于烟气流动的方向安装在脱硫除雾器内的前后或者前或者后部位；
轴杆，安装在挡板的底面中心并延伸至脱硫除雾器外；
手动或自动驱动机构，通过连杆机构与位于脱硫除雾器外的轴杆的端部相连；
所述手动或自动驱动机构驱动连杆机构动作，进而带动轴杆转动，使得挡板以轴杆为中心进行翻转，控制脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。
其中，所述挡板通过轴杆支撑座安装在脱硫除雾器内的前后或者前或者后部位；所述轴杆支撑座为由两根固定杆和两根安装杆组成的框架结构，两根固定杆呈相互平行悬空架设于脱硫除雾器的内壁上，两根安装杆则分别垂直连接在两根固定杆之间；所述挡板设置于由两根固定杆和两根安装杆组成的框架内，轴杆与两根安装杆和位于两根安装杆之间的挡板相连，将挡板安装在脱硫除雾器内的前后或者前或者后部位。
其中，所述轴杆通过分别固定在两根安装杆上的轴杆支撑轴承与两根安装杆进行连接。
其中，所述轴杆还通过安装在脱硫除雾器外壁上的固定架进行加固；所述固定架包括两根支撑杆和一根连接杆，两根支撑杆分别位于轴杆两侧并与轴杆保持平行固定在脱硫除雾器外壁上，连接杆则垂直连接于两根支撑杆的端部之间；所述轴杆的端部穿过连接杆后通过连杆机构与手动或自动驱动机构相连。
本发明的有益效果为：
在脱硫除雾器的烟气流通区域内，可在局部加装垂直于烟气流动方向的挡板，通过控制挡板的开闭数量，调节脱硫除雾器两侧的压差，以控制通过脱硫除雾器的烟气流通变化，实现满足烟气流速在3.3～3.8m/s范围区间运行，使脱硫除雾器达到除雾的最高效率。
附图说明
图1为圆形脱硫除雾器内安装烟气流速的调节装置的俯视结构图。
图2为图1的局部放大图。
图3为方形脱硫除雾器内安装烟气流速的调节装置的侧视结构图。
具体实施方式
下面结合具体实施例和附图，进一步阐述本发明。
一种脱硫除雾器内烟气流速的调节方法，通过在脱硫除雾器内的前后或者前或者后部位沿垂直于烟气流动的方向设置若干可开闭的挡板，且若干挡板位于同一平面上，通过控制挡板的开闭数量调节脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。其中，挡板的开闭动作通过手动或自动驱动机构驱动与挡板的底部中心相连的轴杆实现；而挡板的开闭数量由手动或自动驱动机构根据燃煤锅炉运行工况的负荷参数变化执行。
利用前述脱硫除雾器内烟气流速的调节方法，可设计出一种脱硫除雾器内烟气流速的调节装置，如图1和图2所示，包括挡板1、轴杆2和手动或自动驱动机构3。
挡板1通过轴杆支撑座5沿垂直于烟气流动的方向安装在脱硫除雾器内的前后或者前或者后部位。所述轴杆支撑座5为由两根固定杆51和两根安装杆52组成的框架结构，两根固定杆51呈相互平行悬空架设于脱硫除雾器的内壁上，两根安装杆52则分别垂直连接在两根固定杆51之间。挡板1通过轴杆2安装于由两根固定杆51和两根安装杆52组成的框架内。
轴杆2与挡板1及两根安装杆52的连接具体为：轴杆2安装在位于两根安装杆52之间挡板1的底面中心，并通过分别固定在两根安装杆52上的轴杆支撑轴承6与两根安装杆52进行连接，轴杆2的一端部延伸至脱硫除雾 器外，该位于脱硫除雾器外的轴杆2的端部还通过连杆机构4与手动或自动驱动机构3相连。
为使轴杆2的安装更加稳固，轴杆2还通过安装在脱硫除雾器外壁上的固定架7进一步。所述固定架7具体包括两根支撑杆71和一根连接杆72，两根支撑杆71分别位于轴杆2两侧并与轴杆2保持平行固定在脱硫除雾器外壁上，连接杆72则垂直连接于两根支撑杆71的端部之间。轴杆2的端部穿过连接杆72后再通过连杆机构4与手动或自动驱动机构3相连。
本装置通过手动或自动驱动机构3驱动连杆机构4动作，进而带动轴杆2转动，使得挡板1以轴杆2为中心进行翻转，得到控制脱硫除雾器内烟气的流通面积的目的，以实现对烟气流速的调节。
其中，自动驱动机构3可具体采用电动执行器。
在脱硫除雾器内的前后或者前或者后部位安装本装置时，通常在脱硫除雾器的内壁上悬空架设若干相互平行的固定杆51，然后在相连固定杆51之间垂直连接安装杆52，然后在每个由固定杆51和安装杆52组成的框架结构的轴杆支撑座5内并排安装两块挡板1，而分别与并排的两块挡板1相连的轴杆2通过连杆机构4与一个手动或自动驱动机构3相连，即使得每个手动或自动驱动机构3可同时控制两块挡板1的翻转。本装置中，挡板1起到风门的作用；当手动或自动驱动机构3驱动两块挡板1翻转时，相当于打开风 门；当手动或自动驱动机构3没有动作时，两块挡板1保持并排不动，相当于关闭风门。
挡板1的安装数量视具体情况而定，一般安装在脱硫除雾器的前后或者前或者后部位(包括折流板式或旋流板式除雾器)，挡板1可以覆盖全部或部分若干个可调节流通面积的区域。如图1所示，为在脱硫除雾器的前后对称安装挡板1，图中的挡板1覆盖了脱硫除雾器的部分若干个可调节流通面积的区域。
使用时，由燃煤锅炉运行工况的负荷参数变化给定执行值，手动或自动驱动机构3根据得到的负荷参数执行值信息使得挡板1全部或部分翻转，以调节脱硫除雾器内的烟气流通面积，从而可使得脱硫除雾器内的烟气流速控制在3.3～3.8m/s范围区间运行，达到脱硫除雾器除雾的最高效率。如图3所示，左侧的挡板1为闭合状态，即风门关闭；右侧的挡板1为翻转状态，即风门打开。

Claims (7)

  1. 一种脱硫除雾器内烟气流速的调节方法，其特征在于，在脱硫除雾器内的前后或者前或者后部位沿垂直于烟气流动的方向设置若干可开闭的挡板，且所述若干挡板位于同一平面上，通过控制挡板的开闭数量调节脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。
  2. 根据权利要求1所述的一种脱硫除雾器内烟气流速的调节方法，其特征在于，所述挡板的开闭动作通过手动或自动驱动机构驱动与挡板的底部中心相连的轴杆实现。
  3. 根据权利要求2所述的一种脱硫除雾器内烟气流速的调节方法，其特征在于，所述挡板的开闭数量由手动或自动驱动机构根据燃煤锅炉运行工况的负荷参数变化执行。
  4. 一种脱硫除雾器内烟气流速的调节装置，其特征在于，使用权利要求1中所述的一种脱硫除雾器内烟气流速的调节方法，包括：
    挡板(1)，沿垂直于烟气流动的方向安装在脱硫除雾器内的前后或者前或者后部位；
    轴杆(2)，安装在挡板(1)的底面中心并延伸至脱硫除雾器外；
    手动或自动驱动机构(3)，通过连杆机构(4)与位于脱硫除雾器外的轴杆(2)的端部相连；
    所述手动或自动驱动机构(3)驱动连杆机构(4)动作，进而带动轴杆(2)转动，使得挡板(1)以轴杆(2)为中心进行翻转，控制脱硫除雾器内烟气的流通面积，以实现对烟气流速的调节。
  5. 根据权利要求4所述的一种脱硫除雾器内烟气流速的调节装置，其特征在于，所述挡板(1)通过轴杆支撑座(5)安装在脱硫除雾器内的前后或者前或者后部位；所述轴杆支撑座(5)为由两根固定杆(51)和两根安装杆(52)组成的框架结构，两根固定杆(51)呈相互平行悬空架设于脱硫除雾器的内壁上，两根安装杆(52)则分别垂直连接在两根固定杆(51)之间；所述挡板(1)设置于由两根固定杆(51)和两根安装杆(52)组成的框架内，轴杆(2)与两根安装杆(52)和位于两根安装杆(52)之间的挡板(1)相连，将挡板(1)安装在脱硫除雾器内的前后或者前或者后部位。
  6. 根据权利要求5所述的一种脱硫除雾器内烟气流速的调节装置，其特征在于，所述轴杆(2)通过分别固定在两根安装杆(52)上的轴杆支撑轴承(6)与两根安装杆(52)进行连接。
  7. 根据权利要求4所述的一种脱硫除雾器内烟气流速的调节装置，其特征在于，所述轴杆(2)还通过安装在脱硫除雾器外壁上的固定架(7)进行加固；所述固定架(7)包括两根支撑杆(71)和一根连接杆(72)，两根支撑杆(71)分别位于轴杆(2)两侧并与轴杆(2)保持平行固定在脱硫除雾器外壁上，连接杆(72)则垂 直连接于两根支撑杆(71)的端部之间；所述轴杆(2)的端部穿过连接杆(72)后通过连杆机构(4)与手动或自动驱动机构(3)相连。
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