解读电厂高加设备泄漏原因及处理办法

1、high plus resecti onbig shaft解读电厂高加设备泄漏原因及处理办法Read high power plant equipment leakagereas on and treatme nt method某厂两台135MW机组高压加热器（以下简称高加）为立式 U型管高加，每台机组有两台高加，具有蒸汽冷却段及疏水冷却段，疏水 选用逐级自流自下一级加热器。135MW机组的高加切除运转，机组供 电煤耗要进步3%即l1g每度左右，致使机组发电的经济性大大下 降。外表式高加水侧压力大于汽侧压力，一旦管系走漏，给水就会冲 入壳体，若是发现不及时就会致使汽侧满水。Two 135 mw

2、 high p ressure heater at a factory (here in after referred to as high) for the vertical U tube high, each unit has two high, with steam cooling segment and hydrophobic watercooling section,hydrophobic choose themselves go step by stepfrom the next level of heater. 135 mw operation, unit power suppl

3、y coal consumption want to progress 3%, n amely l1g each degrees or so, the po wer gen eratio n efficie ncy drops greatly. App eara nee type high side pr essure is greater tha n the p ressure of steam side of water, once the piping leakage, the water will into the housing, if found will cause n ot i

4、n time with water steam side.水将有能够沿着抽汽管道倒灌入汽轮机，形成汽轮机机组振荡、 动态碰摩甚至大轴曲折等恶性事端。这类因为加热器走漏而致使汽轮 机进水的事端在国内外发作过多起。 因而剖析加热器走漏缘由，找出 对策，以尽能够削减走漏具有十分重要的含义。Water along the extraction steam piping will be able to flowbackward into the steam turbine, steam turbinegeneratoroscillatio n, dyn amic rubb ing malig nant

5、trouble eve n winding, etc. http:/ p:/ htt p:/ http:/ this ki nd of heater leakage in turb ineinletdisturbaneeattack too much at home and abroad. And analyze the heater leakage reason, find out the countermeasures, in order to try to cut has very imp orta nt meanings to leak.汽轮机选用回热加热体系是进步机组运转经济性的重要

6、手法之。回热加热体系的运转可靠性和运转功能的凹凸，直接影响整套机 组的运转经济性，加热器的投入率是经济目标中重要的一项查核目 标。跟着火力发电厂机组向大容量高参数开展，高加接受的给水压力 和温度相应进步；在运转中还将遭到机组负何骤变、给水泵毛病、旁 路切换等致使的压力和温度的骤变，这些都会给高加带来危害。为此, 除了在高加的描绘、制作和装置时有必要保证质量外，还要在运转保 护等方面采纳必要的办法，才干保证高加的长时间安全运转。http:/ p:/ htt p:/ http:/ turbine choose regenerative heating system is one ofthe imp

7、 orta nttech niqueadva nces the work efficie ncy.Rege nerativeheati ng system op erati onreliability op erati on fun cti on of con cave and conv ex, directly affects the op erati on efficie ncy of a comp lete set of, the heater TouRuLv is important in the economic objectives of an audit objectives.F

8、ollow to large cap acity, high p arameter unit in coal-fired power plants, high and accept the feed pressure and temperature of corres ponding p rogress; Will have bee n in the running load sudde n cha nge, feed water pump fault and the byp ass switch of sudden change in pressure and temperature, wh

9、ich has a harmful effect on high added. Therefore, in addition to high and paint,it isn ecessary to en sure the quality,p roducti onandin stallati onin op erati onpr otecti onto adopt n ecessary measures, ability en sure the safety of the high and long time running.高加在运转中存在的疑问及影响， 高加在运转时，无论汽侧或水 侧，温度

10、和压力都很高，因而对高加的描绘、原料、制作、装置、检 修和运转都提出了很高需求，因为有些未满意需求，使得高加体系的存在许多疑问，高加体系的存在疑问大致有四种类型：管系走漏，水http:/ p:/ htt p:/ http:/ and路管制阻塞，进出水侧短路和传热特性不良。High on questi ons that exist in the op eratio nand its in flue nee, high in op erati on, both steam side and water side,temp erature and p ressure are high, so for

11、 the high add paint,raw materials,production,installation, op erati on are put forward very high dema nd, because some not satisfied with the dema nd, makesthe high system existe nee many questi ons, plus high system existe nee questi on there are four typ es: piping leakage, water con trol block, i

12、n and out of the water side short circuit and poor heat tran sfer.据有关的统计资料标明，高加体系的走漏毛病占整个高加体系毛 病停运的65%左右，因而，内泄外漏是高加存在的最主要疑问。高 加内管制走漏的缘由剖析，钢管胀口走漏的缘由剖析泰山奇石， 管板 变形，高加管板水侧压力高、温度低，汽侧则压力低、温度高。若是 管板的厚度不行，则管板会会向汽侧鼓凸，发作必定的变形。在机组 负荷改变时，尤其在调峰起伏大、调峰速度过快或负荷骤变时起重机, 高加水侧压力也会发作较大的改变。Accord ing to related statistica

13、l data in dicate that high plus system leakage p roblem of the high and about 65% of thehttp:/ p:/ htt p:/ http:/ faultshutdow n, therefore,in sideleak ingoutsideleakage was high and there are the main questions. Highscon trol leakage reas on an alysis, steel pipe expansion mouthleakage reas on an a

14、lysis, tube p late deformatio n, high waterside tube plates with high pressure,low temperature,lowpressure, high temperature steam side. If not the thicknessofthe tube p late, tube p late to ride to the gas side bulge, theattack will be deformati on. When the load cha nges, esp eciallyin the large l

15、oad fluctuation,peak shaving speed too fast,orload change, high side pressure of water will attack the largercha nge.这些改变会使管板发作变形致使管制胀口走漏。 我厂管板厚度在400mn左右，彻底满意运转需求，能够扫除此条缘由钢塑土工格栅。高加的管板原料是合金钢，板上堆焊了一层低碳钢，钢管选用爆破胀接技能，胀接在管板上，往往因为堆焊技能不过关，致使留有焊接缺点。These cha nges will swell the on set of tubep latedeformati on led to con trol leakage. Our factory at about 400mm tube platethick ness,thoroughly satisfiedop erati onrequirements, to eliminate the cause. High tube plate materialhttp:/ p:/ htt p:/ http:/