锅炉烟道

The experiment results prove that the boiler coking is largely reduced and the temperature difference of two sides of horizontal gas-pass is very small, when the 330MW boiler operate, the pressure of primary hot air parison is controlled beyond 12.0～12.5KPa, the O2 content of air pheheater is controlled about 3.0%, the door of OFA is opened to 30%, the buffle of the inner secondary air sleeve is adjusted to the minimum, the outer secondary air swirling strength and the baffle of the outer secondary air sleeve is regulated to the maximum and the outlet temperature of pulvervised mill is kept in 70℃.

试验结果表明，330MW运行时，一次热风母管压力控制在12.0～12.5kPa以上、空气预热器实际氧量控制在3.0％左右、燃尽风门开至30％、内二次风量套筒挡板调整在最小、外二次旋流强度和外二次风套筒挡板调整到最大、磨煤机出口温度维持在70℃，此时锅炉结焦大幅度减轻，水平烟道两侧烟温差非常小。优化试验完成后，进行了单烧灵武烟煤对比，结果是：掺烧高灰熔点的银北煤后，炉膛结焦大幅度减轻，锅炉过热器减温水量较小，主蒸汽压力易提高，带负荷能力正常；再热器烟气挡板开度较大、减温水量较小；风机电耗较小。

Shared facilities and equipment means the residential district or single houses, the construction cost has been assessed on entering the shared home sales prices up and down the main water pipeline legislation, water pipe, flue, water storage tanks, pressure pumps, boiler, elevator , antenna, lighting, power lines, heating lines, safety facilities, fire facilities, roads, green spaces, trenches, drains, ponds, wells, non-operating car garage, public sports facilities and shared facilities and equipment used in housing.

共用设施和设备是指住宅小区或单房屋，建筑成本已分摊进入房屋销售价格共用上下水管道的主要立法，水管，烟道，水箱，压力泵，锅炉，电梯，天线，照明，供电线路，暖气线路，安全设施，消防设施，道路，绿地，沟，沟渠，池塘，水井，非经营性车库，公共体育设施和共用设施和设备中使用的住房。

Research expressed, if the twist angle and the intergradation surface of the screwy SH panels are suitable the velocity deviation of the tangentially fired boiler horizontal gas pass can be cut down to zero.

研究表明，在合适的扭曲角度和过渡面下，采用扭曲分隔屏可以将四角喷燃锅炉水平烟道烟速偏差降到最小。

The effect of division platen superheater arrangement on velocity deviation has been studied for the first time.

通过对炉内流场的详细测量，研究了切向燃烧锅炉水平烟道烟速偏差的形成机理。

The thermal imbalance test of the panel and high temperature reheater was carried out.

在锅炉的水平烟道中的屏式再热器和高温再热器上开展了热偏差试验。

It is about the ring screw thread smoke channel of the boiler shell type gas tube in the boiler field.

锅壳式烟管锅炉烟管内置水管的环形螺纹烟道，它涉及锅炉领域。

Reduction in the amount of flue gas and fuel due to higher boiler thermal efficiency under oxygen-rich atmosphere results in dust decrease in the exhaust gas, which makes it possible to improve flue gas velocity for utility boilers.

富氧气氛下由于烟气量的减少以及锅炉热效率提高所带来的燃料量的减少使得烟气中的粉尘量得到一定的降低，为电站锅炉水平烟道烟气流速的提高带来了可能。

For coal-fired boilers: coal rate of 8 ~ 20%; clear coking coal-fired system 50 ~ 95%; to reduce sulfur emissions 20 ~ 30%; to reduce harmful gas emissions 50 to 95 percent; firepower improve about 20%; lower value of about 14% of spontaneous combustion, and life brought about by the extension of the boiler to reduce the repair cycle of the furnace, flue, heating surface, such as equipment maintenance Qing Jiao role in enhancing the stability of combustion, reducing harmful gas emissions and other benefits.

对于燃煤锅炉：节煤率为8～20％；清除燃煤系统结焦50～95％；降低硫排放20～30％；降低有害气体排放50～95％；火力提高20％左右；降低自燃值14％左右，并带来延长锅炉使用寿命，减少维修周期，对炉膛、烟道、受热面等设备具有清焦保养作用，提高燃烧的稳定性，减少有害气体的排放等效益。

These factors have seriously influenced the security and economical operation of the unit. This paper firstly summarizes the research background and the general situation of resarch about the overheating problem of boiler's high-temperature surface ,introduces the aspects and research findings in this field such as flux deviation、thermal deviation、flue gas velocity deviation at the exit of furnace and tee bends,et al.Then analyses the reason why high-temperature surfaces are overheated from such aspects as design、manufacture、operation, et al and points out one of the main factors that cause the overheating of reheaters is the flue gas velocity deviation caused by the remaining turning at the exit of furnace.

本文首先综合论述了课题的研究背景和目前电站锅炉高温受热面超温问题的研究概况，介绍了国内外流量偏差、热偏差、炉膛出口残余旋转、&三通&等研究方向和研究成果，然后从锅炉的设计、制造、运行等方面分析了高温再热器超温的原因，指出水平烟道内气流的残余旋转是造成再热器超温的主要原因之一。

Results show that a combustion technique by increasing upper half counter offsetting auxiliary airs progressively and biasing superheater division panels can eliminate gas imbalance and heat deviation , decrease slagging on furnace and reduce NOx emission effectively.

某300MW 逆时针切向布置燃烧器锅炉在不同二次风反切方式下分隔屏向左偏置一定角度时，炉膛、烟道气流流动特性模型试验和数值模拟的研究结果表明：燃烧器上半部分二次风递增反切分隔屏偏置一定角度的燃烧技术能显著改善烟道偏流现象，可防止过大热偏差引起高温对流受热面超温、爆管，同时能降低炉内燃烧器区域结渣程度、减少NOx 生成，且改造方便、效果明显。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐