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HSM-15型伸缩式短杆蒸汽吹灰器


发布时间:

2022-10-18

来源:

企业内部

HSM-15型伸缩式短杆吹灰器,是我公司认真研究了国内外同类产品的设计、运行、维护特点,总结本公司长期对各类吹灰器维修维护经验后,研发的一种新型吹灰器。与国内外同类产品相比较,该吹灰器具有以下显著特点

综述

HSM-15型伸缩式短杆吹灰器,采用双喷嘴前伸到位后定点旋转吹灰,主要用于吹扫锅炉水冷壁上的结灰和结渣。其吹扫弧度、吹灰压力都可根据要求调整,以达到最理想的吹灰效果。

1.1 特点

HSM-15型伸缩式短杆吹灰器,是我公司认真研究了国内外同类产品的设计、运行、维护特点,总结本公司长期对各类吹灰器维修维护经验后,研发的一种新型吹灰器。与国内外同类产品相比较,该吹灰器具有以下显著特点:

首先,对吹灰器的关键部件—阀体作了重大改进。其优点是:

Ø 拆卸容易,维修方便。

Ø 降低维护成本。

1.2 吹灰原理

HSM-15型伸缩式短杆吹灰器,可近控、远控和程控。吹灰时,按下启动按钮,减速传动机构驱动喷头、枪管及后部的凸轮沿导向杆前移,喷头及枪管旋转伸出。当枪管伸到前极限位置即喷嘴中心距水冷壁约50mm时,在喷嘴接近吹灰面时,凸轮开启阀门,吹灰开始。吹灰过程可分为手动及自动控制。完成360度旋转,完成吹扫后控制系统使电机反转,喷嘴、枪管和凸轮停止转动而退至待机位置,当碰到后行程开关直至电源断开,凸轮停在起始位置。至此,吹灰器完成了一次吹灰过程。

1.3 主要技术参数

行程(mm)

210~260

电机电流(A)

0.58~0.62

行走度(mm/min)

750

喷嘴数量及口径(mm)

2Xφ16

吹灰枪转速(rpm)

3.5

喷嘴后倾角

吹灰介质

过热蒸汽

介质耗量(kg/圈)

≤30

吹灰压力(MPa)

0.8~1.9

每次工作时间(S)

95

有效吹灰半径(m)

1.5~2.5

吹灰时间(S)

20

电机型号

 

外型尺寸(mm)

 

电机参数

AC380V  50HZ 0.4KW 1400rpm

总重量

130kg

主要结构介绍

HSM-15型伸缩式短杆吹灰器主要由阀体、内外管、减速传动机构、支承板和导向杆机构、电气控制机构、罩壳等组成。有关各部件的主要结构如下图示:

HSM-15型伸缩式短杆蒸汽吹灰器

(1)法兰  (2)阀体部件  (3)开发机构  (4)导向机构  (5)枪管

(6)传动部件   (7)箱体部件

2.1 阀体

阀体是吹灰器的主要部件,位于吹灰器的下部,可根据现场的吹灰要求进行压力调整。其上部装有启动臂,由凸轮操作启动臂,开启和关闭阀门。

2.2 内外管

内管为表面镜面抛光的不锈钢管,其功能是把吹灰介质输送到吹灰枪。外管即枪管,亦称螺纹管,它既是吹灰器的吹灰枪,又是重要的传动部件,伸缩运动是靠枪管上的双头螺旋槽来完成的。外管的后端焊有填料室,装入填料后,实施吹灰枪与内管间的密封。其前端加工有内螺纹,与喷头连接。喷头尾部带有螺纹,可根据炉墙厚度来调节喷头旋入螺纹管的长度。

2.3 传动机构

此机构由电动机、减速箱、齿轮、驱动销及螺纹管等组成,吹灰器的旋转和伸缩运动通过两个驱动销和螺纹管来完成。驱动销用定位螺塞固定在末端大齿轮的内孔内,起到内螺牙的作用。驱动销用硬质合金制成,不仅耐磨性好,而且减少了传动中的卡涩现象,同时也便于更换。

2.4 墙箱

墙箱是吹灰器与锅炉预留口连接的密封接口箱,同时也是将吹灰器固定在炉墙上的支承点。它有负压墙箱和正压墙箱两种。

负压墙箱仅为一接口法兰和密封环,不需接密封空气,炉膛负压吸引空气由吹灰器前端支座导入,对吹灰器接口处进行密封,并使墙箱和吹灰器零件免受烟气倒灌的污染。

正压墙箱内装有风环,高压风从风环导入,对吹灰枪与密封环间的间隙进行密封。它还有另一个作用:正压锅炉运行时,若需要从墙箱上卸下吹灰器,接通压缩空气流过风环形成风幕,封住裸露的开口,直到盖上盖板。

安装与调整

HSM-15型伸缩式短杆吹灰器的安装正确与否,将直接影响吹灰器运行是否正常及吹灰效果的好坏。因此,一定要按照下面的方法安装。

3.1 吹灰器本体就位

安装吹灰器本体时,必须保证吹灰器螺纹管与水冷壁垂直。吹灰时,喷嘴中心距水冷壁向火面约50mm。

HSM-15型伸缩式短杆蒸汽吹灰器

 

3.1.1 检查接口导管

按照安装图的要求,检查套管的规格、长度和垂直度是否符合要求,只有符合要求后,才能安装吹灰器。(导管规格一般为φ89×4.5,与向火面垂直要求为90°)。

3.1.2 焊接墙箱

吹灰器出厂时,墙箱用螺栓固定在吹灰器本体的前端接口法兰上。将墙箱从吹灰器前端接口法兰上卸下,将止口套进炉墙上的接墙套管,焊接定位。焊接时,一定要保证垂直度和法兰孔的方位符合安装图的要求。

3.1.3 吹灰器喷嘴的定位及起吹点的确定

a   准确测量墙箱法兰外表面到向火面距离“A”;

b   将吹灰器的枪管前伸到极限位置,将装有锁紧螺母的喷头旋入枪管,使喷嘴中心至本体前端接口法兰的距离为A+50mm

c   在吹灰器处于全伸位置时,继续操作吹灰器,让转动臂至凸轮工作面大外圆处(吹灰器阀门开始开启)。

d   根据安装部位、吹灰方位和弧度的要求,将喷嘴旋至相应要求的起吹点位置,拧紧锁紧螺母,将锁紧螺母与喷头和枪管点焊,并在螺纹管后端的法兰上做上标记,示出喷嘴方位,以备以后检查、调试之用。

3.2 固定吹灰器

用螺栓将本体上的接口法兰与墙箱固定,吹灰器就安装在锅炉上了。接通电源,启动吹灰器几次,检查喷头与套管间是否有磨擦卡涩现象。若存在磨擦卡涩现象,说明垂直度不够,应及时进行处理。

3.3 吹灰器与管道的连接

² 管道规格应能保证吹灰流量的要求;

² 吹灰介质是蒸汽时,所有蒸汽管道至少有10º的疏水斜度;

² 不能把吹灰器作为管道的支承点。管道应有足够的膨胀弯,不论冷态和热态,都应避免使吹灰器承受不合理的张力;

² 所有的吹灰管道与系统连接前,必须“吹扫” ,将管内的杂物吹净。为此,卸下疏水阀,将管道法兰与吹灰器法兰脱开,在两法兰间插入一金属片,使两法兰错开,确保冲管时吹出的杂物不进入吹灰器的阀门;

² 上紧吹灰器法兰,压紧垫片时,所有的螺栓应十字交叉地分布均匀拧紧,防止受力不匀而使垫片变形损坏。

热态调试

吹灰器安装完毕至正式投运前,必须进行试运行检查与调整。只有经过热态下的试运行、调试,吹灰器才能正式投入运行。

4.1 热态试运行前的检查与准备

n 处理好冷态运行时发现的问题,冷态一切正常后,方可进行热态试运行;

n 吹灰枪管应后退至正确位置。

4.2 试运行

冷态完全正常后,吹灰器接通蒸汽进行试运行,要注意观察、处理以下问题:

u 运行电流是否正常,热态时由于水冷壁的下移和蒸汽的导入是否使吹灰器增加不应有的负荷,喷头与接墙套管是否有磨擦发生;

u 阀门连接法兰与内管连接法兰是否上紧,若存在漏气现象,及时上紧;

u 调整阀杆填料和内管填料到合适的松紧程度。

注意:调整阀杆填料和内管填料的松紧程度时,拧到能防止蒸汽泄漏即可。过紧会缩短填料的寿命。而且填料过紧会影响阀杆的正常复位;内管填料过紧会增加吹灰器负荷,甚至拉伤内管。因此,阀门刚开启时,沿此二处有少量蒸汽和水的泄漏是正常现象。

运行与保养

对吹灰设备维修前先切断电源、汽源,以防止吹灰器的意外启动和吹灰器阀门的开启。即使阀门是关闭的,密封面由于蒸汽的冲蚀或变形,存在轻微的泄漏是可能的。在进行设备维修时,要特别注意这一点。

5.1 运行常规与吹灰秩序

吹灰器运行前要特别注意:有时要调整锅炉的运行工况,一般按烟气流向吹扫锅炉,先炉膛吹灰器,后过热器和省煤器的吹灰器。对特别严重的积灰,有必要将尾部烟道的吹灰器与前面的吹灰器交替启动,以防锅炉出口区段的严重阻塞。

5.2 日常检查的内容

² 吹灰器的传动系统与阀门开启机构是否可靠;吹灰器的润滑是否良好;

² 阀门是否存在泄漏现象;阀杆填料和内管填料是否需要收紧或更换;

² 吹灰效果如何;喷嘴距水冷壁的距离是否合适;吹灰的角度是否正确;

² 喷嘴是否有烧损情况。

5.3 润滑

HSM-15型伸缩式短杆吹灰器的润滑见下表:

 

润 滑 部 位

润  滑  剂

附    注

油嘴

4#钙基润滑脂 GB491

3处

螺纹管

MoS2(0#)+2#防锈油GB4879

气相防锈纸Ⅰ类2级QB868

刷涂

大齿轮、棘爪组件、阀门填料室外螺纹、驱动销定位螺孔、定位螺塞、配对法兰螺栓

MoS2(0#)+2#防锈油GB4879

刷涂

 

前支座轴承为特制轴承(非标),内面填充二硫化钼润滑脂,平时不必润滑。

5.4 喷嘴前后位置的调整

吹灰器吹灰时,喷嘴中心到水冷壁向火面的距离为约50mm,此尺寸非常重要,安装时务必保证。当调整好后将螺母与螺纹导管点焊。但锅炉运行一段时间后,由于水冷壁变形或其它原因,有些吹灰器的这一尺寸可能会变化,有必要再进行调整。

5.5 阀门和阀杆填料

当阀门开启,沿阀杆有蒸汽泄漏时,可上紧填料螺母来调整。有时需要增加填料环或更换填料。操作时,用专用工具压下弹簧(见下图),取出阀杆卡子,就可旋出填料螺母,添加或更换填料了。

向下拧紧填料螺母到足够的圈数,保证在开启阀门时,启动臂不得将弹簧压盖压得与填料螺母接触。

填料螺母的松紧程度在启动吹灰器时调整,调整到能防止泄漏即可,过紧会缩短填料寿命,甚至影响阀杆复位。

若阀门关闭后仍有少量蒸汽泄漏,则说明密封面被冲蚀或阀瓣翘曲变形,这时,必须重新研磨密封面,若密封面严重损坏,则要堆焊密封面,然后再行研磨。

5.6 内管填料

若填料处漏气,在填料压盖与填料室法兰间尚有间隙时,可上紧填料压盖。当已无调节余地,但填料情况良好时,可增加一圈填料,不必全部更换。增加填料圈时,先取出端环,将添加的填料圈放在旧填料组与端环之间。当填料变硬变干时,就需要更换全部填料。增加和更换填料时,注意填料圈的方向(见下图),且开口环的切口相互错开90º。

 

HSM-15型伸缩式短杆蒸汽吹灰器

注意:填料压盖压紧螺母的螺牙必须上满。

注意:上紧填料压盖螺母,到吹灰器开始运行时有轻微泄漏即可,随着填料膨胀,泄漏将会停止,过紧会缩短填料寿命并使吹灰器增加额外负荷。


关键词:精密钣金、自动化

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