1、 防止保温材料空洞材料塌陷的产品（一）保温材料性能对比成型微孔硅酸钙产品具有质地较硬、抗热震性、可塑性差，容易碎裂粉化、容重较高、材料规格种类多、材料管理工作量大等缺点。(a) thermal insulation material performance comparison forming microporous calcium silicate products with a hard, poor thermal shock resistance and plasticity, shatter easily pulverization, high bulk density, materi
2、al specifications, variety, materials management workload big shortcoming. 复合硅酸盐纤维板和复合硅酸盐膏产品具有质地柔软、密度低、导热系数小、优良的热稳定性及抗热震性、优良的抗拉强度、无腐蚀无污染、施工简便可塑性强、使用寿命长，受热膨胀小，外包铁皮不会有拉裂、凹凸等优点，其保温效果特别好。http:/ http:/ http:/ http:/ Composite silicate fiberboard and composite silicate paste products with a soft, low dens
3、ity, low coefficient of thermal conductivity, excellent thermal stability and thermal shock resistance, good tensile strength, no corrosion, no pollution, easy construction of plasticity, long service life, small thermal expansion, outsourcing tin there will be no cracking, and the advantages of con
4、cave and convex, the heat preservation effect is very good. （二）产品综合经济效益(2) the product comprehensive economic benefits 复合硅酸盐纤维板和复合硅酸盐膏保温材料在相同工艺条http:/ http:/ http:/ http:/ 件下，其使用厚度为硬质成型微孔硅酸钙保温材料的五分之三，可使管道外保护层用量相应减少 18，散热损失相应减少 20。无论是一次性投资，还是每年的散热损失费用等方面，均以使用复合硅酸盐纤维板和复合硅酸盐膏保温材料为最经济，且具有良好的综合经济效益。Compo
5、site silicate fiberboard and composite silicate paste insulation materials under the same process conditions, its use hard molding thickness for three 5 of the microporous calcium silicate insulation material, can make the pipe outer protective layer corresponding to reduce 18%, corresponding to red
6、uce heat loss by 20%. Whether one-time investment, or a year of heat loss, etc., are to use composite silicate fiberboard and composite silicate paste insulation materials for the economy, and has good comprehensive economic benefits. （三）保温材料的选择http:/ http:/ http:/ http:/ (3) the thermal insulation
7、material selection 通过以上对比，主蒸汽管道的保温材料采用复合硅酸盐纤维板和复合硅酸盐膏保温材料。Through the above comparison, the main steam pipe of heat preservation material with composite silicate fiberboard and composite silicate paste thermal insulation material. 三、改造的施工技术方案及工艺要求（一）拆除从锅炉主蒸汽出口集箱至汽轮机高压缸范围内管道上的原保温结构，清除干净管道表面的灰尘和铁锈。Thr
8、ee schemes, the transformation of the construction http:/ http:/ http:/ http:/ technology and technical requirements (1) removed from the outlet of the boiler main steam header to the steam turbine high pressure cylinder piping within the scope of the original heat preservation structure, clean up d
9、irt and rust on the surface of the pipe. （二）使用复合硅酸盐膏保温材料直接在管道、阀门表面进行涂抹，形成厚度为 20mm 的基础保温层。(2) using composite silicate insulation paste materials directly coated on the surface of pipes, valves, formed the basis of 20 mm thick insulation. （三）在主蒸汽管道基础保温层上用细铁丝捆扎 3 层复合硅http:/ http:/ http:/ http:/ 酸盐纤维板，
10、每层厚度为 25mm，将它错缝粘贴，并用复合硅酸盐膏保温材料涂抹保温层的缝隙， 钢塑土工格栅保证其保温的密封性能。在第 1、2、3 层复合硅酸盐纤维板外用细铁丝网整体捆扎、勒紧，防止保温层滑动、错位。外使用复合硅酸盐膏保温材料进行厚度为 20mm 的密封涂抹，形成厚度为 95mm 的主保温 层。(3) in the main steam pipe based on the thermal insulation layer with fine wire strapping three layer composite silicate fiberboard, each layer thicknes
11、s is 25 mm, will it be done paste, composite silicate paste insulation materials insulation daub and aperture, assure its insulation sealing performance. In 1, 2, 3 layer composite silicate fiberboard topical fine wire overall strapping and tighten, prevent the thermal insulation layer sliding and d
12、islocation. Outside using composite silicate insulation paste material thickness is 20 mm sealing daub, forming the main insulation layer thickness is 95 mm. http:/ http:/ http:/ http:/ （四）在主蒸汽管道主保温层上，用细铁丝捆扎一层复合硅酸盐纤维板，厚度为 25mm，将它错缝粘贴，并用复合硅酸盐膏保温材料涂抹保温层的缝隙，保证小型升降机其保温的密封性能。在第 4 层复合硅酸盐纤维板外用细铁丝网整体捆扎、勒紧，防
13、止保温层滑动、错位。外使用复合硅酸盐膏保温材料进行厚度为 10mm 的密封涂抹，形成厚度为 35mm 的加强保温层。(4) on the main steam pipe main insulation layer, with fine wire banding layer compound silicate fiberboard, thickness is 25 mm, will it be done paste, composite silicate paste insulation materials insulation daub and aperture, ensure the sea
14、ling performance of the heat preservation. In the fourth layer composite silicate fiberboard topical fine wire bundling, tighten, prevent the thermal insulation layer sliding and dislocation. Outside using composite silicate insulation paste material thickness is 10 mm sealing daub, formation thickn
15、ess for the strengthening of 35 mm. http:/ http:/ http:/ http:/ （五） 主蒸汽管道保温层构成为基础保温层（20mm）、主保温层（95mm）和加强保温 层（35mm ）， 总 厚度为 150mm。(5) main steam pipeline insulation structure based on the thermal insulation layer (20 mm), the main insulation layer (95 mm), and strengthen the insulation layer (35 mm),
16、 the total thickness of 150 mm. （ 六） 最外层金属保护层的材料用 0.8mm 铝皮封包， 相邻搭接不小于 40mm，并在适当的位置留出自由膨胀余量。安装时，应紧贴保温层，环向接缝、纵向接缝和水平接缝必须上搭下，成顺水方向。弯头铝皮的 吊车外弧段另外增加一条宽度为 50mm 的铝皮纵向连接，使弯头铝皮的环向、纵向都http:/ http:/ http:/ http:/ 能连接成牢固的整体，不会产生脱节现象。(6) the outermost layer of metal material with 0.8 mm aluminum skin packet, adj
17、acent lap should not less than 40 mm, and in the proper place to set aside free expansion space. When installation, should be close to the thermal insulation layer, the link to the joints, longitudinal seams and horizontal seam must be set, as well. Bend aluminum skin segment also increase a longitu
18、dinal connection width is 50 mm aluminum skin, make the toroidal bend aluminum skin, longitudinal can connect into a solid whole, wont produce disconnectedness. （七）施工后的保温层，不得覆盖设备的铭牌、仪表等。设备的名称、介质流向标识、色标及时按原样恢复。(7) after construction of insulation layer, and may not cover equipment nameplate, instrume
19、nts, etc. The flow direction of medium equipments name, logo, color code as-is to restore in http:/ http:/ http:/ http:/ time. 四、改造后的效果及经济性分析Four, after transforming the effect and economy analysis （一）改造前后监测点的外表面温度对比将弯头作为监测点， 对其改造前、后弯头监测点处的外表面温度测温。实施了保温节能改造后，外表面温度完全符合 gb4272 92 规定的标准，原超温点已经消除，平均温度下降
20、 22，保温效果得到了明显的提高。(a) monitoring before and after the modification of the surface temperature compared to the elbow as monitoring points, the http:/ http:/ http:/ http:/ transformation before and after elbow outside surface temperature of the temperature monitoring. Thermal insulation implemented aft
21、er modification, the surface temperature completely conform to the standards prescribed by the gb4272-92, the original overtemperature points have been eliminated, the average temperature drop 22 , the heat preservation effect is improved obviously. （二）改造前后的散热损失对比(2) heat dissipation loss of contras
22、t before and after the transformation 散热损失通常以热流密度 q（w/m2）表示。散热损失与散热面http:/ http:/ http:/ http:/ 积之乘积，就是该面积的散热量，所以散热面积内的散热损失表示了该区域的保温状况，该项指标是检验热力设备保温效果的主要指标 1. 改造前散热损失:主蒸汽温度为 550，平均外表面温度为 w 前 55，按同一 环境温度 25计算： 改造前 为 10.92w/（m2.k）；q 改造前为 327.6w/m2。Heat loss is usually expressed as a heat flux q (w/m2)
23、. Heat loss and heat dissipation area of the product, it is the heat dissipating capacity of the area, so the heat loss of heat dissipation area according to the insulation condition of the area, the index is a major index to examine the effects of thermal equipment insulation 1. Heat losses before
24、modification: the main steam temperature is 550 , the average surface temperature for the former t w = 55 , calculated on the same environment temperature 25 : alpha before modification is 10.92 w/(m2, k); Q is 327.6 w/m2 before modification. 可看出，改造前的散热损失已经超过标准值。http:/ http:/ http:/ http:/ Before we
25、 can see, transform the heat loss is more than standard values. 2. 改造后散热损失:2. After transforming heat loss: 平均外表面温度为 w 后 33，按同一 环境温度 25计算： 改造后 为 9.82w/（m2.k）；q 改造后为 78.56w/m2。After the average surface temperature is t w = 33 , calculated on the same environment temperature 25 : alpha after transform
26、ing is 9.82 w/(m2. K); After reforming the q is 78.56 http:/ http:/ http:/ http:/ w/m2. 可以看出，改造后的散热损失比标准值降低。It can be seen that after the transformation of the heat loss lower than the standard values. （三）改造后的经济性分析(3) after the transformation of the economic analysis http:/ http:/ http:/ http:/ 单位换热
27、量的对比分析计算， 其中主蒸汽管道保温后外表面换热面积900m2。Units in contrast analysis and calculation of heat, of which the main steam pipe insulation outside surface after heat exchange area a = 900 m2. 降低散热损失 q q 改造前-q 改造后 249.04w/m2， 降低率 q 76，减少 热流量损失 q 224136 。To reduce heat loss after reconstruction of the delta q = q b
28、efore - q = 249.04 w/m2, lower rate q % = 76%, reducing the loss of heat flow delta phi a delta q = 224136 w. http:/ http:/ http:/ http:/ 改造后 1h 内减少散热量，即节能 h 806889.6kj， 以机组年运行 6000h，锅炉热效率 90计算，运行 1 年即可节约标准煤量 b qbqh 183540kg，燃煤单价按 1000 元/t 计算，每年节约资金：183.541000 183540 元，取得了显著的经济效益。Within 1 h after re
29、construction to reduce heat loss, saving energy q = the delta phi x h = 806889.6 kj, unit to run 6000 h, eta = 90% thermal efficiency calculation of boiler operation one year can save amount of standard coal b = b QBQ eta x h = 183540 kg, coal-fired unit price calculated at 1000 yuan/t, save money each year: 183.54 x 1000 = 1000 yuan, has obtained the remarkable economic benefits.
