在线LOW-E镀膜玻璃生产线

600t/d在线LOW-E镀膜玻璃生产线

一、产品概述

1985年英国皮尔金顿公司在世界上率先开发出低辐射镀膜玻璃（简称Low—E玻璃），用它制成的Low—E中空玻璃传热系数可以降到1.8w/m2•k左右，产品投入生产后效果非常好，从此Low—E玻璃走向了市场。

在生产玻璃过程中，在锡槽末端设置一套镀膜装置，可生产低辐射膜（Low—E）玻璃和遮阳膜（Sun—E）玻璃，称为在线镀膜技术。

普通浮法玻璃的热辐射率 E=0.84，对可见光和红外线都有很高的透射比；而低辐射膜玻璃辐射率最低可达到0.10以下，低辐射膜双层中空玻璃比普通浮法中空玻璃可减少辐射热损失60%，节能效果非常明显。

Low—E、Sun—E玻璃的性能参数如下。

低辐射膜玻璃对太阳光中可见光有高的透射比，可达80%以上，对近红外线部分透射比较低，而对室内物体辐射的远红外线却有很高的反射比，减少室内的热能通过热辐射传到室外，这对我国北方地区的冬季节约取暖能耗具有重大的作用，同时可避免冬季窗户结霜。低辐射玻璃还能阻挡紫外线，改善居住环境。 阳光控制膜与低辐射膜不同，对整个太阳辐射光波段都有较低的透射比，使太阳辐射能很少进入室内，减少室内对太阳辐射热量的吸收，降低室内夏天温度的升高，节约炎热地区夏天的空调能耗。

二、国内外市场概况

低辐射玻璃在国内市场的应用前景令人看好，北京、广州、上海等大城市已就有关建筑镀膜玻璃的使用做出明确规定，为尽量避免过度使用镀膜玻璃所产生的光反射等副作用，禁止在幕墙工程中采用落后的普通蒸发真空镀膜、普通化学镀膜工艺生产的镀膜玻璃，幕墙用玻璃可见光反射率要控制在30%以下，城市主干道、立交桥、高架桥来往观测的建筑物20m以下，其余路段10m以下的玻璃幕墙采用反射比在12%以下的低反射玻璃。Low—E玻璃的可见光反射率≤12%、Sun—E玻璃的可见光反射率≤9%，这将为Low—E、Sun—E玻璃在中国城市化进程中提供十分广阔的市场发展空间。

“国家提出的建筑节能目标是到2010年，全国新增建筑的1/3达到节能50%的目标；到2020年，全国新增建筑全部达到节能65%的目标。按2010年的目标计算，今后5年将新增节能建筑面积约30亿m2，涉及节能玻璃面积约6亿m2，平均每年新增节能玻璃约1.2亿m2，Low—E玻璃的将出现跳跃式增长的趋势。

在国际市场上，美国是Low—E玻璃用量最多的国家，其最新的建筑立法规定窗户的传热系数不应高于2w/m2•k，而在目前的材料中只有Low—E中空玻璃符合此标准。欧州各国Low—E中空玻璃用量也较大，由于欧州要求窗户的传热系数在要达到1.8w/m2•k以下，预计今后5年欧州各国对Low—E中空玻璃需求量将以10%的速度递增。

三、生产规模选择 根据市场需求发展预测，低辐射镀膜玻璃市场发展空间将会十分广阔。据此推荐本项目规模为600t/d（日熔化玻璃液量），可年产各种厚度的优质浮法玻璃334万重量箱。生产低辐射镀膜玻璃多少，可根据市场需求确定，如按占产量10%则可年产低辐射镀膜玻璃33.4万重量箱。

四、投资及经济效益

建设一条600t/d在线镀膜玻璃生产线，总投资约45800万元，年销售收入65000万元，年利税总额17300万元，投资利税率约为37.77%。

PRODUCTIVE LINE OF ON-LINE LOW-E FILM-COATED GLASS WITH THE

OUTPUT OF 600 T/D

1. Product Description

In 1985, England PILKINGTON was the first one to develop low–radiation film-coated glass

(calling “Low-E glass” for short) all over the world. The thermal transmission coefficient of the

Low-E hollow glass made of the low-radiation film-coated glass can be lowered to about

1.8w/m2•k, and after the this product was put into operation, the effect was very good, so the

Low-E glass was gone into markets.

In the productive process of glass, a set of film-coated device is installed at the end of tin

groove slot to produce the low-radiation film (Low-E) glass and sun film (sun-E) glass, calling the

on-line film-coated technology. The thermal radiation rate E of the common floating glass is 0.84, and has very high

transmittance on any visible light and infrared. The radiation rate of the low-radiation film glass is

up to below 0.10 at minimum. In comparison with the common floating hollow glass, the

low-radiation double hollow glass can reduce the radiation thermal loss of 60%, with very obvious

energy-saving effect.

The Performance parameters of the Low-E glass and Sun-E glass are shown as follows:

The low-radiation film glass has high transmittance on the visible light in the sunlight, up to

above 80%, and low transmittance on the infrared but very high reflectivity on the far-infrared ray

radiated from the indoor objects so that the transmission of the indoor thermal energy through

thermal radiation to the outdoor is reduced. The low-radiation glass can also stop the ultra-violet

to improve residence environment.

The sunlight control film is different from the low-radiation film, and has lower transmittance

for the whole sun radiation light wave range to keep little sunlight entering the room and reduce

the indoor absorption of sunny radiation, and reduce the indoor temperature rising in summer in

order to save air conditioning energy consumption at the hot area in summer. 2. General Introduction to the Markets both Home and Abroad

The application prospect of the low-radiation glass is good in the domestic markets, in some big

cities like Beijing, Guangzhou, Shanghai, etc., the regulations on the utilization of the building

film-coated glass are made definitely in order to avoid the side effect of light reflection because of

the excessive using of film-coated glass and it is forbidden to use the coated glass made through

the poor common evaporated vacuum film-coating and traditional chemical film-coating process

flow in the project of curtain wall, and the visible light reflectivity of glass used for curtain wall

should be controlled below 30%. Below the 20m of the buildings around the urban key roads,

crossroads and viaducts, and below the 10m of the buildings around the other roads, their glass

curtain walls should adopt the low reflection glass with the reflectivity of below 12%. The visible

light reflectivity of the Low-E glass is ≤12%, and the visible light reflectivity of the Sun-E glass is

≤9% so that the vast developing space in the urbanization process in China is provided to the

Low-E glass and Sun-E glass.

The constructive energy-saving target issued by the State is that up to 2010, the one third of the