壁

The existence of larger size vortexes was identified as the major cause of wall-wetting according to the investigation of a DSI FGD reactor from NFK Co., Japan. Another cause is dewing results from the great temperature difference between the reactor wall and the main flow.

通过对一套工业试验性半干半湿FGD系统反应塔湿壁现象的测试分析发现：塔内涡流滞流区的存在，是湿壁的主要原因；塔壁与主流间过大的温差也经常导致结露湿壁。

According to failure analyses of the cooling wall of No.5 blast furnace in No.1Iron Making Plant of Jigang in heavy repair in 2000, the main cause of longitudinal crack of cooling wall with ribs enchased in bricks is the temperature instability of hot side of cooling wall.

根据济钢第一炼铁厂5＃高炉在2000年大修中的破损情况，分析筋条镶砖式冷却壁纵裂原因是冷却壁热面温度不稳定，而全覆盖式冷却壁由于其结构能使冷却壁本体温度变化幅度小，且有很强的抵抗裂纹扩展的能力，因而破损速度较慢。

The robot can undertake the dangerous work of sweeping and inspecting water-cooling tubes. When the minimum thickness of the tube lower than the prefabricating value is inspected, an alarm is given and a sign is spraged on the tube. It has many advantages,such as high efficiency and safety, low cost, less work intension etc., so it is worth generalizing.

介绍了一种新研制开发的永磁吸附式双履带结构爬壁机器人，主要应用于火力发电站的大型排管锅炉中的水冷壁排管壁面的清扫和检测，并能够在检测到壁面厚度小于预置的极限值处发出报警信号、打标记，具有较高的推广应用价值。

The results show that the side wall angle is the major factor, the influence of the friction coefficient between the roller and the tube billet on the external diameter ovality and the wall thickness unevenness is secondary, and the influence of the ratio of side wall radius on the rolling force and the wall thickness unevenness is the least.

结果表明：侧壁角是最重要的影响因素，管坯和轧辊间的摩擦因数对外径椭圆度和壁厚不均的影响居于次位，侧壁半径比对轧制力和壁厚不均的影响最小。

Methods:The self-made potassium chloride monopha- sic action potential recording electrodes(KCI-MAP elec- trodes)were pluged into the canine left anterior ventricu- lar wall,where isoprenalinewas administered through the KCI-MAP electrodes to mimic the increase of local sympathetic nervous tension,monophasic action potentialof the three layers(endocardium,mid-myoeardium and epicardium)at left anterior ventricular wall were re- corded simultaneously before and after Iso been administered.

方法经自制跨室壁氯化钾单相动作电位记录电极(KC1-MAP电极)于左心室前壁局部给予异丙肾上腺素模拟局部交感神经张力增加，记录给药前后三层心肌的单向动作电位，分析动作电位时程、图形特征和跨室壁复极离散度的变化，观察VT的诱发情况和VT发作时室壁激动顺序。

Wall thickness is a key index for water-wall tube inspection in power plant,in order to inspect the tube quickly and evaluate the wall thickness quantitatively,a new method combining the magnetic main flux with ultrasonic technique was proposed.

壁厚是电站锅炉水冷壁管质量监测的一个关键指标，为了实现对水冷壁管的快速无损检测和质量评价，提出了主磁通检测与超声波检测相融合的壁厚检测新方法。

The wire winding wheel has one left disc with two sections of circular wall to form the power cable inlet and embedding opening and positioning hole in the peripheral of the shaft pipe; one right disc with central shaft pipe, positioning expansion pipe capable of being inserted into the positioning hole and circular wall in the same radius as that in the left disc; and one power cable winding shaft inserted into the circular walls to form one integral and with power cable inlet.

本发明在左内凹盘的反面圆台上相对位置突出2段弧形围壁，成为电源线导入口和对侧的嵌入豁口，轴管外围分设定位孔；右内凹盘反面圆台中央也突出轴管，其外围对应定位孔的位置上设置可插入孔内的定位胀管，环设的环围壁与左内凹盘的反面圆台上弧形围壁对应等径；嵌入围壁插入嵌入豁口而成为一体的设有电源线导入口的绕线轴。

Two pairs of chutes and holes on the cleaning base and the brushes form the double chute swing mechanisms by the connection of an axis and cause the brush to cling to the wall surface to clean by the friction feedback, thus achieving effective cleaning when walking error occurs and the pipe section changes, furthermore, the larger the friction on the wall surface is, the larger the forward pressure on the wall surface is, therefore, the dirtier the wall surface is, the higher the cleaning efficiency is.

清扫底座与刷子夹上的两对滑槽和孔通过轴的连接形成双滑槽摆动机构，并通过摩擦力反馈使得刷子能够紧贴壁面进行清洗，从而在出现行走误差和管道截面变化时都能够有效清洗，并且壁面摩擦力越大刷子作用在壁面上的正压力越大，因此壁面越脏时清扫效率越高。

In the present work, based on the mechanism of low - temperature corrosion, an opinion was presented by theoretical analysis and computation, that is the vacuum boiler can not avoid being corroded completely under low temperature, but the corrosion is very weak no matter if the exhaust gas temperature is higher than the flue gas dew point; it was obtained the relationship between the corrosion velocity of metal wall and wall temperature along gas pass of vacuum boiler, and the one between the corrosion velocity of metal wall and wall temperature under the condition that the flue gas temperature is lower than the acid dew point.

文章从锅炉发生低温腐蚀的机理人手，通过理论分析计算并通过实践检验，提出了真空相变锅炉虽然不能完全避免低温腐蚀问题，但不论排烟温度是否高于烟气露点，低温腐蚀的程度都很弱的观点；给出了真空相变锅炉沿烟气流程金属壁面的腐蚀速度与壁面温度的关系曲线，和烟气温度低于酸露点时金属壁面的腐蚀速度与壁面温度的关系曲线；同时，文章推荐真空相变锅炉的设计排烟温度取130℃左右的低排烟温度。

In the present work, based on the mechanism of low-temperature corrosion, an opinion was presented by theoretical analysis and computation, that is the vacuum boiler can not avoid being corroded completely under low temperature, but the corrosion is very weak no matter if the exhaust gas temperature is higher than the flue gas dew point; it was obtained the relationship between the corrosion velocity of metal wall and wall temperature along gas pass of vacuum boiler, and the one between the corrosion velocity of metal wall and wall temperature under the condition that the flue gas temperature is lower than the acid dew point.

本文从锅炉发生低温腐蚀的机理入手，通过理论分析计算并通过实践检验，提出了真空相变锅炉虽然不能完全避免低温腐蚀问题，但不论排烟温度是否高于烟气露点，低温腐蚀的程度都很弱的观点；给出了真空相变锅炉沿烟气流程金属壁面的腐蚀速度与壁面温度的关系曲线，和烟气温度低于酸露点时金属壁面的腐蚀速度与壁面温度的关系曲线；笔者专门从事真空相变锅炉的设计研究已十多年，根据上述观点设计的数百台产品已经过多年实际运行，未发现明显低温腐蚀。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。